Angular compensation apparatus for cylindrically-curved eyewear on vertical crown headgear

Abstract

An apparatus for mounting cylindrically-curved eyewear to vertical crown headgear addresses the problem of lens misalignment when hat visors are tilted. A compensation mechanism connects lens securing apparatuses to paired guide rails mounted on opposite lateral sides of the headgear crown, automatically adjusting the lens angle as the eyewear moves through a visor slit in the visor, maintaining the lens substantially parallel to the user's face. The mechanism operates substantially at or below a nominal visor plane to preserve crown graphics visibility. The present invention provides intentional angular compensation through specific mechanical features that function independently of crown curvature. Embodiments include multi-position curved path systems, single-position systems, two-piece articulating systems, and dual-position graduated release systems with main and lesser locking tabs providing selective angular adjustment. Side-mounted locking tab configurations enable synchronized release via continuous flexible connectors. A tether retraction system with constant force spring provides automatic retraction.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This is a continuation-in-part (CIP) patent application claiming the benefit and priority of a co-pending U.S. Non-provisional patent application Ser. No. 19/074,695, filed on Mar. 10, 2025, which claimed priority to U.S. Provisional Patent Application Ser. No. 63/635,637, filed on Apr. 18, 2024, the entire contents of both priority applications are incorporated herein by reference.

BACKGROUND OF THE INVENTION

Technical Field

The invention relates generally to an eyeshield, such as sunglasses, safety glasses, eye visors, and prescription glasses, and, more particularly, the invention relates to eyeshield positioning mechanisms for headgears, specifically an angular compensation apparatus that maintains cylindrically-curved cycling-style eyewear parallel to the user's face when mounted on vertical crown headgear with variable visor angles.

Description of Related Art

Eyeshields that protect the eye from various hazards, such as, but not limited to, impact, debris, chemicals, water, light, or UV-rays such as sun glasses, blue light glasses, safety glasses, swim goggles, and eye visors are well known in the art. Eyeshields with additional functionalities, such as, but not limited to, prescription glasses, 3D glasses, augmented reality glasses, and even virtual reality headsets, are well known in the art.

Various headgears, such as, but not limited to, hats, caps, beanies, berets, helmets, and cowboy hats are known in the art. Some headgears with attached eyeshields, such as protective face shields, and helmets for activities such as snowboarding and motorcycling, are well known in the art.

Wide-format cycling and action sports eyewear typically employs cylindrical lens curvature (single-axis horizontal curve) for optical clarity and peripheral vision. Integration of such eyewear with snapback or trucker-style hats having vertical crown profiles creates a geometric incompatibility causing lens flare-out and user discomfort.

The parent application discloses an eye protection apparatus with a positioning mechanism allowing an eyeshield to move through a slit in a hat visor. While providing basic functionality, it lacks angular compensation necessary for wide-format cylindrical lenses on vertical crown headgear.

Japanese Patent JP2007138350A to Mitani discloses a hat with glasses having a slide support with rail (element 31) and slider (element 32) system. Mitani's hat is designed for small reading glasses (<100 mm width) and graphics on the hat is obstructed when the glasses is not fully lowered. Furthermore, the rails follow spherical crown curvature, requiring curved crowns to function and cannot accommodate vertical crown architecture. Mitani's disclosure also does not provide compensation for cylindrical lens geometry. Therefore, Mitani's system cannot provide angular compensation on vertical crown headgear because vertical crowns have no curvature for the rails to follow. The rails would remain straight and vertical, providing zero angular adjustment and leaving cylindrical lenses in flare-out position.

Korean Patent Application KR1011796252 potentially shows vertical crown compatibility but lacks angular adjustment capability.

U.S. Patent Publication 20080028501 to Schimpf describes motorcycle helmet visor controls using Bowden cables and actuators. This disclosure addresses rounded motorcycle helmets, but not vertical crown geometry or cylindrical lens compensation requirement.

U.S. Patent Publication 20210330019 to Scharpenack covers ballistic forehead shields for military/tactical helmets, which protects the forehead of the wearer. This disclosure does not address eyewear angular adjustment.

Prior art fails to recognize the specific geometric incompatibility between cylindrical lens curves (single-axis horizontal curve, 8-10″ radius, widths configured to span substantially between the lateral sides of typical headgear crowns), vertical crown architecture (90-105° crown-to-visor angle in snapbacks/truckers), and variable visor angles (users adjust visors 0-30° from horizontal). This creates a “flare-out” problem where cylindrical lens edges move away from the temples while the bottom edge lifts away from the cheeks, allowing sun, wind, and debris to enter from below—a problem non-existent with spherical lenses or rounded crowns addressed by prior art.

BRIEF SUMMARY OF THE INVENTION

The present invention is an eye protection apparatus comprising a headgear 110, 210, 310, an eyeshield 120, 220, 320, and a positioning mechanism 130, 230, 330. The headgear 110, 210, 310 comprises a head covering 111, 211, 311 and a protruding portion 113, 213, 313 with a slit 114, 214, 314. The protruding portion 113, 213, 313 is attached to an outer portion 112, 212, 312 of the head covering 111, 211, 311. The eyeshield 120, 220, 320 has an eye-shielding surface 121, 221, 321. The positioning mechanism 130, 230, 330 comprises at least one attachment portion 131, 231, 331, at least one securing apparatus 132, 232, 332, and at least one movement apparatus 133, 233, 333. The attachment portion 131, 231, 331 is for attaching the positioning mechanism 130, 230, 330 to the head covering 111, 211, 311 of the headgear 110, 210, 310. The securing apparatus 132, 232, 332 secures the eyeshield 120, 220, 320 to the positioning mechanism 130, 230, 330. The movement apparatus 133, 233, 333 is configured to allow movement of the securing apparatus 132, 232, 332 and the eyeshield 120, 220, 320 secured to the securing apparatus 132, 232, 332 through the slit 114, 214, 314 of the protruding portion 113, 213, 313 of the headgear 110, 210, 310. The movement apparatus 133, 233, 333 is also configured to allow the securing apparatus 132, 232, 332 and the eyeshield 120, 220, 320 secured to the securing apparatus 132, 232, 332 to tilt at an angle when the eyeshield 120, 220, 320 is positioned below the slit 114, 214, 314. The positioning mechanism 130, 230, 330 is configured to alleviate pressure of the eyeshield 120, 220, 320 on a user's face and head.

In a preferred embodiment, the headgear 110, 210, 310 is a cap and the protruding portion 113, 213, 313 is a visor of the cap.

In a preferred embodiment, the movement apparatus 133, 233, 333 is comprised of a guide rail 234, 334 and the securing apparatus 132, 232, 332 is configured to move along the guide rail 234, 334 of the movement apparatus 133, 233, 333.

In an embodiment, the positioning mechanism 130, 230, 330 is configured to allow a user to manually control the movement of the securing apparatus 132, 232, 332 and the eyeshield 120, 220, 320 secured to the securing apparatus 132, 232, 332 through the slit 114, 214, 314 of the protruding portion 113, 213, 313 of the headgear 110, 210, 310.

In another embodiment, the positioning mechanism 130, 230, 330 is configured to allow a user to mechanically control the movement of the securing apparatus 132, 232, 332 and the eyeshield 120, 220, 320 secured to the securing apparatus 132, 232, 332 through the slit 114, 214, 314 of the protruding portion 113, 213, 313 of the headgear 110, 210, 310.

In yet another embodiment, the positioning mechanism 130, 230, 330 is configured to allow a user to electromechanically control the movement of the securing apparatus 132, 232, 332 and the eyeshield 120, 220, 320 secured to the securing apparatus 132, 232, 332 through the slit 114, 214, 314 of the protruding portion 113, 213, 313 of the headgear 110, 210, 310. The positioning mechanism 130, 230, 330 can further comprise a button 139 configured to allow the user to electromechanically control the movement of the securing apparatus 132, 232, 332 and the eyeshield 120, 220, 320 secured to the securing apparatus 132, 232, 332 through the slit 114, 214, 314 of the protruding portion 113, 213, 313 of the headgear 110, 210, 310.

In an embodiment, the eyeshield 120, 220, 320 embodies one or more properties, which can be UV protection, radiation protection, visible light filtration, impact resistance, durability, polarization, optometric prescription, ANSI Z87.1, 3D binocular vision, multifocal, prism correction, high refraction index, scratch resistant, anti-reflective, water-repellant, light-responsive, and flash mirrored. The eye-shielding surface 121, 221, 321 of the eyeshield 120, 220, 320 can be made of glass, plastic, polycarbonate, trivex, high-index plastic, acetate, CR39 plastic, or polyacrylate, or any other material known in the art. A position of the eyeshield 120, 220, 320 can be locked by a locking mechanism 560 of the positioning mechanism 130, 230, 330, such as detents, springs, or magnetic material, or any other locking mechanism known in the art.

In an embodiment, the headgear 110, 210, 310 and the positioning mechanism 130, 230, 330 can be comprised of one or more of fiber, fabric, metal polymer, and composite materials, and any other materials and mixture of materials known in the art. The headgear 110, 210, 310 and the positioning mechanism 130, 230, 330 can be made of multiple portions, with each portion using different materials.

In an embodiment, the eye protection apparatus 100, 200, 300 may be just comprised of an eyeshield 120, 220, 320 having an eye-shielding surface 121, 221, 321 and a positioning mechanism 130, 230, 330, the positioning mechanism 130, 230, 330 comprising at least one attachment portion 131, 231, 331, at least one securing apparatus 132, 232, 332, and at least one movement apparatus 133, 233, 333. The securing apparatus 132, 232, 332 secures the eyeshield 120, 220, 320 to the positioning mechanism 130, 230, 330. The attachment portion 131, 231, 331 of the positioning mechanism 130, 230, 330 can be used to attach the eye protection apparatus 100, 200, 300 to a separately manufactured or provided headgear 110, 210, 310. The movement apparatus 133, 233, 333 is configured to allow movement of the securing apparatus 132, 232, 332 and the eyeshield 120, 220, 320 secured to the securing apparatus 132, 232, 332 through a slit 114, 214, 314 in a protruding portion 113, 213, 313 of the headgear 110, 210, 310.

The present invention provides an angular compensation apparatus specifically solving the geometric incompatibility between cylindrically-curved wide-format eyewear and vertical crown headgear with adjustable visors.

The apparatus maintains cylindrical lenses parallel to the user's facial plane 586 regardless of visor angle, preventing the flare-out problem unique to this geometry combination. This enables integration of popular cycling eyewear styles with snapback and trucker hats.

Multiple mechanical configurations achieve the compensation, including multi-position curved path systems, single-position systems, two-piece articulating systems, dual-position graduated release systems, and side-mounted locking tab systems with synchronized release. In preferred embodiments, paired guide rails 434a, 434b are positioned on opposite lateral sides of the headgear crown, with corresponding lens securing apparatuses 432a, 432b (hereinafter “LSA”) at each end of the lens 420 traveling synchronously through their respective rails.

BRIEF DESCRIPTIONS OF THE DRAWINGS

FIG. 1A is a side perspective view of an embodiment of the eye protection apparatus 100 having a headgear 110 having a head covering 111 and a protruding portion 113 with a slit 114, an eyeshield 120, and a positioning mechanism 130 having two attachment portions 131, two securing apparatuses 132, and two movement apparatuses 133, with the eyeshield 120 positioned below the slit 114. A handle 170 is provided for manual control of the positioning mechanism 130.

FIG. 1B is a side perspective view of the embodiment of the eye protection apparatus 100 shown in FIG. 1A, with the eyeshield 120 positioned above the slit 114.

FIG. 1C is the side perspective view of the embodiment of the eye protection apparatus 100 shown in FIG. 1B, with a button 139 provided for mechanical control 180 of the positioning mechanism 130.

FIG. 1D is the side perspective view of the embodiment of the eye protection apparatus 100 shown in FIGS. 1B-1C, with a button 139 provided for electromechanical control 190 of the positioning mechanism 130.

FIG. 2A is a front view of another embodiment of the eye protection apparatus 200 having a headgear 210 having a head covering 211 and a protruding portion 213 with a slit 214, an eyeshield 220, and a positioning mechanism 230 having two attachment portions 231, two securing apparatuses 232, and two movement apparatuses 233, with the eyeshield 220 positioned above the slit 214.

FIG. 2B is a front view of the embodiment of the eye protection apparatus 200 shown in FIG. 2A, with the eyeshield 220 positioned below the slit 214.

FIG. 3A is a left side view of the embodiment of the eye protection apparatus 200 shown in FIGS. 2A-2B, with the eyeshield 220 positioned above the slit 214.

FIG. 3B is a left side view of the embodiment of the eye protection apparatus 200 shown in FIGS. 2A-3A, with the eyeshield 220 positioned below the slit 214.

FIG. 4A is a back view of the embodiment of the eye protection apparatus 200 shown in FIGS. 2A-3B, with the eyeshield 220 positioned above the slit 214.

FIG. 4B is a back view of the embodiment of the eye protection apparatus 200 shown in FIGS. 2A-4A, with the eyeshield 220 positioned below the slit 214.

FIG. 5A is a right side view of the embodiment of the eye protection apparatus 200 shown in FIGS. 2A-4B, with the eyeshield 220 positioned above the slit 214.

FIG. 5B is a right side view of the embodiment of the eye protection apparatus 200 shown in FIGS. 2A-5A, with the eyeshield 220 positioned below the slit 214.

FIG. 6A is a top view of the embodiment of the eye protection apparatus 200 shown in FIGS. 2A-5B.

FIG. 6B is a bottom view of the embodiment of the eye protection apparatus 200 shown in FIGS. 2A-6A.

FIG. 7A is a side view of another embodiment of the eye protection apparatus 300 having a headgear 310 having a head covering 311 and a protruding portion 313 with a slit 314, an eyeshield 320, and a positioning mechanism 330 having two attachment portions 331, two securing apparatuses 332, and two movement apparatuses 333, showing that the movement apparatus 333 is configured to allow the securing apparatus 332 and the attached eyeshield 320 to tilt at an angle 339 when the eyeshield 320 is positioned below the slit 314.

FIG. 7B is a side view of the eye protection apparatus 300 shown in FIG. 7A, also showing that the movement apparatus 333 is configured to allow the securing apparatus 332 and the attached eyeshield 320 to tilt at an angle 339 when the eyeshield 320 is positioned below the slit 314.

FIG. 8A is a front view of an embodiment of the eyeshield 420 and a positioning mechanism 430 of the eye protection apparatus 400.

FIG. 8B is a back view of the eyeshield 420 and the positioning mechanism 430 of the eye protection apparatus 400 shown in FIG. 8A.

FIG. 8C is a side view of the eyeshield 420 and the positioning mechanism 430 of the eye protection apparatus 400 shown in FIGS. 8A-8B.

FIG. 8D is a top view of the eyeshield 420 and the positioning mechanism 430 of the eye protection apparatus 400 shown in FIGS. 8A-8C.

FIG. 9A is a side above perspective view of the embodiment of the positioning mechanism 430 of the eye protection apparatus 400 of FIGS. 8A-8D, showing an attachment portion 431, a securing apparatus 432, a movement apparatus 433 that comprises a guide rail 434, with ends of the guide rail 434 capped by a first cap 437 and a second cap 438 to prevent the securing apparatus 432 from falling out.

FIG. 9B is a front view of the movement apparatus 433 of the positioning mechanism 430 of the eye protection apparatus 400 shown in FIG. 8A-9A.

FIG. 9C is a side view of the movement apparatus 433 of the positioning mechanism 430 of the eye protection apparatus 400 shown in FIGS. 8A-9B, showing the securing apparatus 432 at a first end 435 of the guide rail 434 of the movement apparatus 433.

FIG. 9D is a side view of the movement apparatus 433 of the positioning mechanism 430 of the eye protection apparatus 400 shown in FIGS. 8A-9C, showing the securing apparatus 432 at a second end 436 of the guide rail 434 of the movement apparatus 433, showing the securing apparatus 432 tilted at an angle.

FIG. 10A is a side angled view of an eyeshield 520 and a positioning mechanism 530 of an embodiment of the eye protection apparatus 500, with a spring 580 shown in the guide rail 534 of one of the movement apparatuses 533 for mechanical control of the positioning mechanism 530, and the first cap 537 of the movement apparatus 533 and the securing apparatus 532 serving as a locking mechanism 560 together.

FIG. 10B is a front view of the first cap 537 of the movement apparatus 533 and the securing apparatus 532 of the positioning mechanism 530 shown in FIG. 10A, showing how the two parts work together as the locking mechanism 560.

FIG. 10C is a top view of the first cap 537 of the movement apparatus 533 of the positioning mechanism 530 shown in FIGS. 10A-10B, showing slots 560 of the locking mechanism 560.

FIG. 10D is a close-up side angled perspective view of the first cap 537 of the movement apparatus 533 and the securing apparatus 532 of the positioning mechanism 530 shown in FIG. 10A-10C, showing how the two parts work together as the locking mechanism 560, with a portion of the first cap 537 of the movement apparatus 533 partially cut out.

FIG. 10E is a close-up side angled perspective view of the first cap 537 of the movement apparatus 533 and the securing apparatus 532 of the positioning mechanism 530 shown in FIGS. 10A-10D, showing how the two parts work together as the locking mechanism 560, with a portion of the securing apparatus 532 and a portion of the first cap 537 of the movement apparatus 533 partially cut out.

FIG. 11 is an exploded side perspective view of a positioning mechanism 630 of an embodiment of the eye protection apparatus 600 with a spring 680 shown for mechanical control of the positioning mechanism 630, and a second cap 638 with magnets 660, a securing apparatus 632 with magnets 660, and a movement apparatus 633 with magnets 660 forming a locking mechanism 660.

FIG. 12A is an upper perspective view of an embodiment of the securing apparatus 732 showing a magnet 760 and a slot for the magnet 760, to serve as a part of a locking mechanism 760.

FIG. 12B is a below perspective view of an embodiment of the second cap 738 of the movement apparatus showing a magnet 760 and a slot for the magnet 760, to serve as a part of a locking mechanism 760.

FIG. 13 is an embodiment of the positioning mechanism 830 that allows the user to electromechanically control the movement of a securing apparatus 832 and an eyeshield secured to the securing apparatus 832 (eyeshield not shown) along the movement apparatus 833 using a motor 890.

FIG. 14 is an embodiment of the securing apparatus 932 having a tilting mechanism 991 that assists in tilting to an angle at a second end of a guide rail of a movement apparatus.

FIG. 15A is a side view showing the flare-out problem on a headgear 412 with a visor 414 in tilted-upward position. A cylindrically-curved lens 420 mounted without angular compensation is parallel to a vertical crown face, with a flare-out zone 584 showing lens edges flaring away from temples and a lower lens edge gap 590 between the lens bottom and user's cheek. A reference head profile is included for context.

FIG. 15B is a side view showing a corrected lens 420 position with angular compensation, achieving face-parallel orientation 586 on a headgear 412 with visor 414 in tilted-upward position. Lens securing apparatus 432 is shown in deployed position with a lens 420 passing through a visor slit 415. A reference head profile demonstrating proper lens-to-face alignment with no gap at bottom is shown.

FIG. 15C is an isometric view showing a complete paired rail system on the vertical crown headgear 412 with visor 414 in tilted-upward position. Paired guide rails 434a, 434b are visible on opposite lateral sides of crown, first and second lens securing apparatuses 432a, 432b are in deployed position, cylindrically-curved lens 420 spans between both LSAs and passes through the visor slit 415, and crown graphics area 418 is preserved and clearly visible as shown. A reference head profile is shown for context.

FIG. 16A is an exploded view of a single guide rail assembly showing a guide rail 434 with an internal channel 1037, a curved transition section 1035, a straight vertical section 1036, and a flexible locking tab 1045 with locking teeth 1047. A constant force spring housing 472 at top/rear of the rail 434, a tether cable 474 routed from the housing 472 through the channel 1037, a lens securing apparatus 432 with an upper guide protrusion 1038, a lower guide protrusion 1039, a locking ridge 1049, and a tether attachment point 476, and a partial cylindrically-curved lens 420 showing one end are shown. A second guide rail assembly configured as mirror image on opposite lateral side is also shown.

FIG. 16B is an isometric view of an assembled paired guide rail assembly showing a first guide rail 434a and a second guide rail 434b with a cylindrically-curved lens 420 spanning between a first lens securing apparatus 432a and a second lens securing apparatus 432b in deployed, angularly compensated position.

FIG. 17A is a side view of a single-position system showing a guide rail 434 with a rounded cutout 1042 at a lower exterior portion for angular positioning. A rotation stop surface 1041 is configured to contact a bridge portion of LSA 432 to prevent over-rotation. A lens securing apparatus 432 with a single cylindrical guide protrusion 1040 extends through the LSA body and is positioned within the rounded cutout 1042 for pivoting. A single locking detent on a flexible locking tab 1045 engages LSA 432 when rotated into position.

FIG. 17B is a side view cutaway of a two-piece articulating system showing a straight guide rail 434, a rail interface member 562 positioned within the rail 434 maintaining vertical orientation, a lens holding member 564 pivoted to achieve angular compensation, an internal pivot joint 566 connecting the two pieces perpendicular to a direction of travel, a flexible locking tab 1045 with a larger protrusion engaging the rail interface member 562 for a vertical position lock and a smaller angled protrusion engaging ratcheting teeth 568 on the lens holding member 564 for an angular position lock.

FIG. 17C is an exploded view of the two-piece articulating system of FIG. 17B showing the rail interface member 562 with guide protrusions and a cylindrical section, the lens holding member 564 with ratcheting teeth 568 on the back, and the internal pivot joint 566 assembly showing how the lens holding member 564 pivots around the rail interface member 562.

FIG. 18A is a cross-sectional side view of an embodiment of the guide rail 1034 showing a lens securing apparatus in a first position within the straight vertical section 1036, oriented vertically with no angular compensation. The upper guide protrusion 1038 and lower guide protrusion 1039 are aligned vertically within the internal channel 1037.

FIG. 18B is a cross-sectional side view of the guide rail 1034 of FIG. 18A showing the lens securing apparatus in a second position entering the curved transition section 1035, beginning to rotate as the guide protrusions 1038, 1039 follow the arcuate path of the internal channel 1037.

FIG. 18C is a cross-sectional side view of the guide rail 1034 of FIGS. 18A-18B showing the lens securing apparatus in a third position further into the curved transition section 1035 with increased rotation.

FIG. 18D is a cross-sectional side view of the guide rail 1034 of FIGS. 18A-18C showing the lens securing apparatus in a fourth position at full angular compensation.

FIG. 19A is a three-quarter perspective view of a rounded crown headgear for comparison, showing a traditional baseball cap with a curved crown profile, guide rails following the crown curvature naturally, lens in a fully lowered use position, and the crown graphics area visible above the lens.

FIG. 19B is a three-quarter perspective view of the rounded crown headgear of FIG. 19A showing the lens in a partially raised position and the lens blocking and obstructing the crown graphics area, to illustrate the prior art problem where the lens blocks graphics in any position except fully lowered, contrasting with the present invention which operates at or below the visor plane to preserve graphics visibility.

FIG. 20A is an isometric view of a dual-position graduated release system showing a guide rail 434 with a lens securing apparatus 632 in a deployed position, a locking tab assembly 610 with a main locking tab 612 visible, lateral actuator protrusions 616 on sides of the main tab 612, a lesser locking tab 618a visible on one side, a lens holding portion 1140 of LSA 632, and a tether cable 474.

FIG. 20B is a side view cutaway of the dual-position system of FIG. 20A showing LSA 632 at 0° neutral position, a cylindrical pivot portion 1134, the main locking tab 612 engaging the pivot portion 1134, the lesser locking tabs 618a, 618b flexed against the cylindrical surface but not engaged in cutouts, a rotation-enabling protrusion 1138 positioned in a rotation-enabling cutout 1142, and angular position cutouts 1136 visible but not aligned with the lesser tabs 618a, 618b.

FIG. 20C is a side view cutaway of the dual-position system of FIGS. 20A-20B, showing LSA 632 rotated to 11° compensated position, the cylindrical pivot portion 1134, the main locking tab 612 still engaging the pivot portion 1134, the lesser locking tabs 618a, 618b now engaged in the angular position cutouts 1136, and the rotation-enabling protrusion 1138 moved within the rotation-enabling cutout 1142.

FIG. 21A is an isometric view of a side-mounted locking tab embodiment showing a guide rail 434 with a side-mounted flexible locking tab 670 on a lateral face of the rail 434, a lens securing apparatus 632 in an angularly compensated position, a side-mounted locking cutout 674 on LSA 632 aligned with and engaged by the tab 670, a rotation-enabling protrusion 1138 visible, and a lens holding portion 1140.

FIG. 21B is a top schematic view of a synchronized release system 650 showing a first guide rail 434a and a second guide rail 434b, both side-mounted flexible locking tabs 670 facing inboard toward the center, a continuous flexible connector 676 comprising a spring steel strip running between both tabs 670 along a headband interior, and a release actuator 652 positioned on or near one rail assembly, illustrating a single-point actuation releasing both locking mechanisms simultaneously.

DETAILED DESCRIPTION

One of the problems with headgears with attached eyeshields is that they are made with the intention of protecting the entire face and head of a user from hazards such as flying debris and chemical spills, and impacts in cases of accidents and falls, and are bulky and cumbersome for everyday use and activities, such as walking around the town on a sunny day. As an option, one can wear an eyeshield and a headgear, such as sunglasses and a cap, together at the same time to avoid wearing headgears with attached eyeshields. However, wearing a headgear and an eyeshield together can become cumbersome and inconvenient, as parts of the headgear can put pressure on the eyeshield, and the eyeshield consequently will transfer the pressure onto the wearer's face, such as the nose bridge, and head, such as the temple, causing discomfort.

For example, when a wearer wears a cap and eyeglasses together, the weight of the cap visor sits on top of the eyeglasses, creating discomfort on the nose bridge area of the wearer. The pressure from the cap's sweatband and the eyeglasses temples can also pose discomfort to the ear area of the wearer. Thus, wearers will often stow their eyeshield on top of their headgear when the eyeshield, such as sunglasses, is not in use to prevent additional pressure on their face or head. However, such a method of alleviating pressure is not secure and the eyeshield can fall or be knocked off of the headgear, causing damage or loss of the eyeshield.

Therefore, an eye protection apparatus that combines an eyeshield with a headgear while providing a mechanism to control the position of the eyeshield and alleviates pressure of the eyeshield on a user's face and head is needed.

In general reference to FIGS. 1A-14, different embodiments of the eye protection apparatus 100, 200, 300, 400, 500, 600 are shown. The eye protection apparatus 100, 200, 300 comprises a headgear 110, 210, 310, an eyeshield 120, 220, 320, and a positioning mechanism 130, 230, 330. In some embodiments, the eye protection apparatus 400, 500, 600 are shown without the headgear, comprising an eyeshield 420, 520, and a positioning mechanism 430, 530, 630, 830. The headgear 110, 210, 310 comprises a head covering 111, 211, 311 and a protruding portion 113, 213, 313 with a slit 114, 214, 314. The protruding portion 113, 213, 313 attaches to an outer portion 112, 212, 312 of the head covering 111, 211, 311. As shown in FIGS. 1A-7B, the headgear 110, 210, 310 can be a cap 110, 210, 310. However, other headgear, such as hats, cowboy hats, berets, helmets, and any other headgear known in the art can be a part of the eye protection apparatus. The protruding portion 113, 213, 313 can be a part of the headgear 110, 210, 310, such as a visor 113, 213, 313 of a cap 110, 210, 310 or can be a part of the eye protection apparatus that can be attached to an existing headgear. The headgear 110, 210, 310 can be comprised of one or more of fiber, fabric, metal polymer, and composite materials, or any other known materials in the art.

The eyeshield 120, 220, 320, 420, 520 has an eye-shielding surface 121, 221, 321, 421, 521. The eyeshield 120, 220, 320, 420, 520 can embody one or more properties, such as UV protection, radiation protection, visible light filtration, impact resistance, durability, polarization, optometric prescription, ANSI Z87.1, 3D binocular vision, multifocal, prism correction, high refraction index, scratch resistant, anti-reflective, water-repellant, light-responsive, and flash mirrored, and any other properties of eyeshield known in the art. At least one material for the eye-shielding surface 121, 221, 321, 421, 521 of the eyeshield 120, 220, 320, 420, 520 is glass, plastic, polycarbonate, trivex, high-index plastic, acetate, CR39 plastic, or polyacrylate, or any other material known in the art for making lenses for eyeshields. Eyeshield can be of any shape or function known in the art, such as an eye-visor, sunglasses, safety glasses, 3D-glasses, prescription glasses, or any other eyeshields known in the art, such as augmented reality glasses.

The positioning mechanism 130, 230, 330, 430, 530, 630, 830 comprises at least one attachment portion 131, 231, 331, 431, 531, 631, at least one securing apparatus 132, 232, 332, 432, 532, 632, 732, 832, 932 and at least one movement apparatus 133, 233, 333, 433, 533, 633, 833. The attachment portion 131, 231, 331, 431, 531, 631 attaches the positioning mechanism 130, 230, 330, 430, 530, 630, 830 to the head covering 111, 211, 311 of the headgear 110, 210, 310. The attachment portion 131, 231, 331, 431, 531, 631 can be attached to the headgear 110, 210, 310 by being sewn or glued onto the headgear 110, 210, 310, or by any other means of attachment known in the art, such as manufacturing directly onto the headgear 110, 210, 310. The attachment portion 131, 231, 331, 431, 531, 631 can be attached to an outer portion 112, 212, 312 of the head covering 111, 211, 311, an inner portion of the head covering 111, 211, 311, or through the head covering 111, 211, 311. The securing apparatus 132, 232, 332, 432, 532, 632, 732, 832, 932 secures the eyeshield 120, 220, 320, 420, 520 to the positioning mechanism 130, 230, 330, 430, 530, 630, 830. In FIGS. 1A-1D, the securing apparatus 132 is not visible due to the eyeshield 120 being positioned in front of it. The movement apparatus 133, 233, 333, 433, 533, 633, 833 is configured to allow movement of the securing apparatus 132, 232, 332, 432, 532, 632, 732, 832, 932 and the eyeshield 120, 220, 320, 420, 520 secured to the securing apparatus 132, 232, 332, 432, 532, 632, 732, 832, 932 through the slit 114, 214, 314 of the protruding portion 113, 213, 313 of the headgear 110, 210, 310. The positioning mechanism 130, 230, 330, 430, 530, 630, 830 can be comprised of one or more of fiber, fabric, metal polymer, and composite materials, and any other materials known in the art. The positioning mechanism 130, 230, 330, 430, 530, 630, 830 is configured to alleviate pressure of the eyeshield 120, 220, 320, 420, 520 on a user's face and head, since the eyeshield 120, 220, 320, 420, 520 is attached to the positioning mechanism 130, 230, 330, 430, 530, 630, 830 attached to the headgear 110, 210, 310 and therefore supported by the headgear 110, 210, 310.

The eyeshield 120, 220, 320, 420, 520 is retractable, as in it can be moved to one position from an original position and then counter moved to the original position. While the FIGS. show the preferred embodiment of the eyeshield 120, 220, 320, 420, 520 pulled fully down or up, the eyeshield 120, 220, 320, 420, 520 can be in any position between fully down and fully up positions. Further, the movement can be sideways and is not limited to up and down vertical movement. While the FIGS. show linear movement of the eyeshield 120, 220, 320, 420, 520, the movement of the eyeshield 120, 220, 320, 420, 520 is not limited to linear movement.

FIG. 1A shows an embodiment of the eye protection apparatus 100, with the positioning mechanism 130 comprising two attachment portions 131 attached to the outer portion 112 of the head covering 111 of the headgear 110, two movement apparatuses 133, and two securing apparatuses 132 (not shown, placed behind the eyeshield surface 121). The eyeshield 120 with the eye-shielding surface 121 is held by the two securing apparatuses 132 (not shown). The securing apparatuses 132 are connected to a handle 170 for manual control of the movement and position of the eyeshield 120. A user can also push or pull on the eyeshield 120 to manually control the eyeshield 120. In FIG. 1A, the eyeshield 120 is shown in the down position 140, fully pulled down through the slit 114 on the protruding portion 113 of the headgear 110.

FIG. 1B shows the embodiment of the eye protection apparatus 100 shown in FIG. 1A, with the eyeshield 120 shown in the up position 150, fully pulled up through the slit 114 on the protruding portion 113 of the headgear 110.

FIG. 1C shows the embodiment of the eye protection apparatus 100 shown in FIGS. 1A-1B, with the eyeshield 120 shown in the up position 150, fully pulled up through the slit 114 on the protruding portion 113 of the headgear 110. Instead of the handle 170 seen in FIGS. 1A-1B, a button 139 is provided for mechanically controlling 180 the movement.

FIG. 1D shows the embodiment of the eye protection apparatus 100 shown in FIGS. 1A-1C, with the eyeshield 120 shown in the up position 150, fully pulled up through the slit 114 on the protruding portion 113 of the headgear 110. The button 139 here is provided for electromechanically controlling 190 the movement. Actuator tab, button, or other methods known in the art can be used to control the movement. Automatic movements can be achieved using detents, springs, or magnetic materials.

FIGS. 2A-2B show front views of another embodiment of the eye protection apparatus 200, with the positioning mechanism 230 comprising two attachment portions 231 (not shown in FIGS. 2A-2B) attached to the outer portion 212 of the head covering 211 of the headgear 210, two securing apparatuses 232, and two movement apparatuses 233. In this embodiment, each movement apparatus 233 has a guide rail 234 for a securing apparatus 232 to move up and down. The guide rail 234 has a first end 235 (shown in FIG. 2A) at the bottom of the guide rail 234, and a second end 236 (shown in FIG. 2B) at the top of the guide rail 234. In FIG. 2A, the eyeshield 220 with eyeshield surface 221 is shown in the up position 250, fully pulled up through the slit 214 (not shown in FIGS. 2A-2B) on the protruding portion 213 of the headgear 210. In FIG. 2B, the eyeshield 220 with eyeshield surface 221 is shown in the down position 240, fully pulled down through the slit 214 (not shown in FIGS. 2A-2B) on the protruding portion 213 of the headgear 210.

FIGS. 3A-3B show side views of the embodiment of the eye protection apparatus 200 in FIGS. 2A-2B, with one of the attachment portions 231 of the positioning mechanism 230 visible. FIGS. 5A-5B show opposite side views of the embodiment of the eye protection apparatus 200 in FIGS. 3A-3B. In FIGS. 3A and 5A, the eyeshield 220 with eyeshield surface 221 is shown in the up position 250, fully pulled up through the slit 214, visible in FIGS. 3A-3B and 5A-5B, on the protruding portion 213 of the headgear 210. In FIGS. 3B and 5B, the eyeshield 220 with eyeshield surface 221 is shown in the down position 240, fully pulled down through the slit 214 on the protruding portion 213 of the headgear 210. In FIGS. 3A-3B and 5A-5B, you can also clearly see that the securing apparatus 232 is shaped to clamp the eyeshield 220 to secure it. Any other attachment means known in the art, such as glue, screws, tongue in groove, and other means can be used to attach the eyeshield 220 to the securing apparatus 232. The securing apparatus 232 slides up and down in the guide rail 234 of the movement apparatus 233.

FIGS. 4A-4B show back views of the embodiment of the eye protection apparatus 200 in FIGS. 2A-3B, 5A-5B. In FIG. 4A, the eyeshield 220 (shown in FIG. 4B) is not visible because the eyeshield 220 is in fully up position. In FIG. 4B, the eyeshield 220 is shown in full down position 240.

FIG. 6A shows a top view of the embodiment of the eye protection apparatus 200 in FIGS. 2A-5B, showing the securing apparatuses 232 of the positioning mechanism 230 in the guide rails 234 (not shown) of the movement apparatuses 233. The second ends 236 of the guide rails 234/the movement apparatuses 233 are shown. The slit 214 on the protruding portion 213 of the headgear 210 can be seen as having a curvature when viewed from the top or the bottom (shown in FIG. 6B), and the eyeshield 220 is shaped to fit through the slit 214. The eyeshield 220 and the slit 214 are not limited to the shapes seen in the FIGS. and can be of any shape or form known in the art as long as the eyeshield 220 is capable of fitting through the slit 214.

FIG. 6B shows a bottom view of the embodiment of the eye protection apparatus 200 in FIGS. 2A-6A, with the attachment portions 231 of the positioning mechanism 230 shown inside of the headgear 210, manufactured to be a part of the headgear 210. The attachment portions 231 can be attached the outer portion 212 (shown in FIG. 6A) of the head covering 211 of the headgear 210 instead. The first ends 235 of the guide rails 234 (not shown)/the movement apparatuses 233 are also shown.

FIGS. 7A-7B show side views of another embodiment of the eye protection apparatus 300, having a headgear 310 comprising head covering 311 with an outer portion 312 and a protruding portion 313 with a slit 314, an eyeshield 320 with an eye-shielding surface 321, and a positioning mechanism 330. The positioning mechanism 330 comprises two attachment portions 331 (only one shown) attached to the outer portion 312 of the head covering 311 of the headgear 310, two securing apparatuses 332 (only one shown), and two movement apparatuses 333 (only one shown). In this embodiment, each movement apparatus 333 also has a guide rail 334 with a first end 335 (not shown) at the bottom and a second end 336 at the top for the securing apparatus 332 to move up and down. When the securing apparatus 332 and the attached eyeshield 320 are pulled all the way down to a down position 340, the movement apparatus 333 is shaped to allow the securing apparatus 332 and the attached eyeshield 320 to tilt an angle 339 at the first end 335 (not shown), allowing the eyeshield 320 to fit comfortably around the face for the user.

FIGS. 8A-8D show another embodiment of the eye protection apparatus 400, without a headgear. However, the eye protection apparatus 400 can be manufactured or attached onto a headgear and a headgear can be a component of the eye protection apparatus 400 as seen in FIGS. 1A-7B. The eye protection apparatus 400 comprises an eyeshield 420 with an eyeshield surface 421, and a positioning mechanism 430 having two attachment portions 431, two securing apparatuses 432, and two movement apparatuses 433. The movement apparatus 433 is formed to have a guide rail 434 (or a channel) having a first end 435 at the bottom and a second end 436 at the top. However, the movement apparatus 433 is not limited to be guide rails, and can be cam grooves, strings, or hinge points that allow movement of the securing apparatus 432. The movement apparatus 433 is shaped (curved) at the first end 435 to allow the securing apparatus 432 to tilt as shown in FIGS. 7A-7B. In the embodiment shown, a first cap 437 is attached to the first end 435 of the guide rail 434/movement apparatus 433 and prevents the securing apparatus 432 from falling out. A second cap 438 is attached to the second end 436 of the guide rail 434/movement apparatus 433 and prevents the securing apparatus 432 from falling out.

FIGS. 9A-9D show the positioning mechanism 430 of the eye protection apparatus 400 shown in FIGS. 8A-8D. FIG. 9A is a perspective view for providing a better view of the first cap 437 and the second cap 438. The first and second caps 437, 438 limit the movement of the securing apparatus 432 to within the guide rail 434 of the movement apparatus 433, thereby preventing the securing apparatus 432 from falling out or flying off the guide rail 434. FIG. 9B is a front view of the positioning mechanism 430, with the securing apparatus 432 within the guide rail 434 of the movement apparatus 433, but the first and second caps 437, 438 removed from the first and second ends 435, 436. FIG. 9C shows a side view of the positioning mechanism 430, showing how the securing apparatus 432 can be at the second end 436 (the top) of the guide rail 434 of the movement apparatus 433 and is prevented by the second cap 438 from falling off the top. FIG. 9D shows a side view of the positioning mechanism 430, showing how the securing apparatus 432 can be at the first end 435 (the bottom) of the guide rail 434 of the movement apparatus 433 and is prevented by the first cap 437 from falling out of the bottom. The tilt and angling of the securing apparatus 432 at the bottom of the guide rail 434 is also shown.

FIG. 10A shows another embodiment of the eye protection apparatus 500, without a headgear. The eye protection apparatus 500 comprises an eyeshield 520 with an eyeshield surface 521, and a positioning mechanism 530 having two attachment portions 531 (only one shown), one securing apparatus 532, and two movement apparatuses 533. The movement apparatus 533 is formed to have a guide rail 534 having a first end 535 at the bottom and a second end 536 at the top. The movement apparatus 533 has a first cap 537 attached to the first ends 535 of the guide rails 534/movement apparatuses 533 that prevents the securing apparatus 532 from falling out. Two second caps 538 are attached to the second ends 536 of the guide rails 534/movement apparatuses 533 and prevents the securing apparatus 532 from falling out. A locking mechanism 560 is provided for this embodiment (see FIGS. 10B-10E). Further, a spring 580 is placed inside each of the guide rail 534 of the movement apparatus 533 as a means to mechanically control the movement, where the force from the compressed spring 580 will mechanically move the securing apparatus 532 and the eyeshield 520 attached back to the up position when unlocked.

FIGS. 10B-10E show the locking mechanism 560 in detail. FIG. 10B is a front view of the securing apparatus 532 locked with the first cap 537 of the movement apparatus 533, to prevent movement of the securing apparatus 532 and the attached eyeshield 520 (not shown) when locked, to hold the eyeshield 520 in the down position. In given embodiment, the first cap 537 has slots 560 for protruding portions 560 of the securing apparatus 532 to slide in and lock in place with. The slot 560 can be seen clearly in FIGS. 10C and 10E. The shape of the slot is not limited to what is shown in FIGS. 10B-10E, and can be of any shape known in the art that works with the shape of the protruding portion 560 of the securing apparatus 532. The protruding portion 560 of the securing apparatus 532 can be also of any shape known in the art. The locking mechanism 560 is not limited to just being a hook and slot type as shown in FIGS. 10B-10E, and can be any locking mechanism known in the art.

FIG. 11 shows an exploded side perspective view of yet another embodiment of the eye protection apparatus 600, without a headgear and an eyeshield. The eye protection apparatus 600 comprises a positioning mechanism 630 having one attachment portion 631, one securing apparatus 632 with two magnets 660, and two movement apparatuses 633 with magnets 660. Each of the movement apparatuses 633 is formed to have a guide rail 634 (only one shown) having a first end 635 at the bottom and a second end 636 at the top. The movement apparatus 633 is shaped so there is no need for a first cap at the first end 635. A second cap 638 with magnets 660 attach to the second ends 636 of the guide rails 634/movement apparatuses 633 and prevents the securing apparatus 632 from falling out. The magnets 660 in the second cap 638, the movement apparatuses 633, and the securing apparatus 632 work together as the locking mechanism 660. When the securing apparatus 632 (and the attached eyeshield) is at fully up position, the magnets 660 in the securing apparatus 632 and the magnets 660 in the second cap 638 lock the securing apparatus 632 in place, until the force between the magnet is overcome manually, mechanically, or electromagnetically. When the securing apparatus 632 (and the attached eyeshield) is at fully down position, the magnets 660 in the securing apparatus 632 and the magnets 660 in the movement apparatuses 633 lock the securing apparatus 632 in place, until the force between the magnet is overcome manually, mechanically, or electromagnetically. The force between the magnets 660 can be overcome manually by pushing or pulling on the securing apparatus 632 (or the eyeshield) or through mechanical or electromechanical means known in the art (see FIG. 13). Further, a spring 680 is placed inside the positioning mechanism 630 as a means to mechanically control the movement. The force from the compressed spring 680 will mechanically move the securing apparatus 632 and the eyeshield attached back to the up position when unlocked from the down position. Other means of mechanically or electromechanically controlling the movement of the securing apparatus 632 known in the art can be used.

FIG. 12A shows an embodiment of the securing apparatus 732 with a slot for a magnet 760 for a locking mechanism 760. FIG. 12B shows an embodiment of the second cap 738 with a slot for a magnet 760 for the locking mechanism 760 in FIG. 12A.

FIG. 13 shows an embodiment of the positioning mechanism 830 that has one securing apparatus 832 and two movement apparatuses 833 each with a guide rail 834. In this embodiment, a motor 890 with gear wheels housed inside that wind and rewind wire or string is shown. The motor 890 allows the user to electromechanically control the movement of the securing apparatus 832 and the eyeshield (not shown) secured to the securing apparatus 832 along the movement apparatuses 833. Other means of electromechanically controlling the movement of the securing apparatus 832 also can be used. The motor 890 can be coupled to a button (as seen in FIGS. 1C-1D) or any other means of controlling the motor.

FIG. 14 is an embodiment of the securing apparatus 932 having a tilting mechanism 991 that assists in tilting to an angle (see FIGS. 7A and 7B) at a second end of the guide rail of the movement apparatus (not shown). Other tilting mechanisms known in the art can be also used instead of the embodiment shown.

Users typically wear sunglasses with hats by tilting the visor 414 upward to accommodate both, prioritizing increased field of view and comfort. This creates multiple problems with fixed-angle cylindrically-curved lenses 420 on vertical crown headgear 412. One problem is an aesthetic problem. When the hat is tilted upward 15-30° (typical wearing position), fixed-angle lenses become parallel or near-parallel to the vertical crown face, creating an awkward appearance. Another problem is a functional problem. When lenses flare out creating a flare-out zone 584, the bottom edge moves away from the face creating a lower lens edge gap 590, allowing sun, wind, and debris to enter from below.

A critical aspect of the present invention is that all angular adjustment mechanisms operate substantially at or below the nominal visor plane 416. The “nominal visor plane” 416 is defined as a reference plane approximating the lower surface of the visor 414 in the region proximate to the guide rails 434a, 434b. For visors having a curved or bowed profile, the nominal visor plane 416 is understood as an average or representative plane approximating the visor geometry in the region where the guide rails 434a, 434b are mounted.

By constraining all mechanical elements to operate substantially at or below the nominal visor plane 416, the crown graphics area 418 remains fully visible and unobstructed when the eyewear is in deployed use positions. This contrasts with prior art like Mitani, where the eyeshield travels across the crown area, blocking graphics in all positions except fully lowered (illustrated in FIG. 19B). Additionally, the area at and below the nominal visor plane 416 coincides with the visor's 414 structural attachment to the crown, providing a stable mounting area for the paired guide rails 434a, 434b.

The present invention solves the previously unrecognized multi-faceted problem of cylindrical lens mounting on vertical crowns, addressing both aesthetic failures (awkward lens-to-crown parallel alignment) and functional failures (flare-out zone 584 and lower lens edge gap 590). All adjustments occur substantially at or below the nominal visor plane 416, preserving hat crown graphics area 418. Unlike prior art where angular change is merely a byproduct of rails following crown curvature, the present invention provides deliberate, controlled angular compensation through specific mechanical features that function independently of crown shape.

Now in general reference to FIGS. 15A-21B, an angular compensation apparatus for a cylindrically-curved eyewear on a vertical crown headgear 412 comprises a mounting structure 410, at least one lens securing apparatus 432, at least one guide rail 434, and a compensation mechanism. The mounting structure 410 is configured for attachment to the headgear 412 having a vertical crown profile with a crown-to-visor angle 588 of 90-105°. The at least one lens securing apparatus 432 is configured to secure a cylindrically-curved lens 420 having a width configured to span substantially between the lateral sides of the headgear crown. The at least one guide rail 434 is configured to receive the at least one lens securing apparatus 432. The compensation mechanism operatively connects the at least one lens securing apparatus 432 to the mounting structure 410. The compensation mechanism provides angular adjustment sufficient to maintain the cylindrically-curved lens 420 substantially parallel to a user's facial plane 586 when the headgear visor 414 is tilted from a neutral position. The compensation mechanism operates substantially at or below a nominal visor plane 416 defined by the lower surface of the visor 414 proximate to the guide rails 434, thereby preserving visibility of crown graphics area 418 during use. For visors having curved profiles, the nominal visor plane 416 is understood as a reference plane approximating the average visor surface geometry in the region of the guide rails 434a, 434b. The at-or-below limitation applies to deployed locked positions of the lens securing apparatus 432.

In an embodiment, the compensation mechanism provides angular adjustment in a range of approximately 5-45°. In another embodiment, the compensation mechanism provides a plurality of angular positions including a first position with substantially zero angular compensation and one or more additional positions with angular compensation, allowing user selection between an uncompensated position and one or more compensated positions.

In an embodiment, the guide rail 434 is fabricated from a material selected from the group consisting of injection molded engineering plastic, stamped sheet metal, and additively manufactured polymer.

In an embodiment, the mounting structure 410 comprises a first guide rail 434a, a second guide rail 434b, a first lens securing apparatus 432a, and a second lens securing apparatus 432b. The first guide rail 434a is positioned on a first lateral side of the headgear crown. The second guide rail 434b is positioned on a second lateral side of the headgear crown opposite the first lateral side. The first lens securing apparatus 432a is configured to travel within the first guide rail 434a. The second lens securing apparatus 432b is configured to travel within the second guide rail 434b. The cylindrically-curved lens 420 spans between and is operatively connected to both the first and second lens securing apparatuses 432a, 432b.

In such embodiment, each guide rail 434a, 434b can further comprise a substantially vertical section 1036 for initial travel of the lens securing apparatus 432, and an angular adjustment mechanism at a lower portion configured to create angular adjustment. All angular adjustment occurs substantially at or below the nominal visor plane 416, with an upper edge of each lens securing apparatus 432 positioned approximately level with or just below the nominal visor plane 416 when deployed.

In such embodiment, the angular compensation apparatus can further comprise a synchronized release system 650 configured to enable single-point actuation for simultaneous release of locking mechanisms associated with both the first guide rail 434a and the second guide rail 434b. The synchronized release system 650 comprises a release actuator 652 positioned at a user-accessible location, and a transmission linkage 654 operatively connecting the release actuator 652 to locking mechanisms at both guide rails 434a, 434b. Actuation of the release actuator 652 causes simultaneous disengagement of locking mechanisms at both guide rails 434a, 434b, permitting synchronized retraction of both lens securing apparatuses 432a, 432b.

In an embodiment, each of the first guide rail 434a and the second guide rail 434b comprises a curved guide section 1035 configured to create angular adjustment through a controlled arcuate path. The first and second lens securing apparatuses 432a, 432b travel synchronously through their respective curved guide sections 1035 to maintain uniform angular positioning of the lens 420.

In another embodiment, each guide rail 434a, 434b comprises a side-mounted flexible locking tab 670 positioned on a lateral face of the guide rail 434, and wherein each lens securing apparatus 432a, 432b comprises a side-mounted locking cutout 674 configured to receive the corresponding locking tab 670 when the lens securing apparatus 432 is in an angularly compensated position. In such embodiment, both side-mounted flexible locking tabs 670 can face the same direction, and further comprise a synchronized release mechanism including a release actuator 652 and a continuous flexible connector 676 extending from the release actuator 652 to both side-mounted flexible locking tabs 670. The actuation of the release actuator 652 deflects both locking tabs 670 outward simultaneously, releasing both lens securing apparatuses 432a, 432b for retraction. Additionally, the continuous flexible connector 676 can comprise a spring steel strip configured to conform to a curved headband geometry while transmitting release force, the spring steel strip routed along an interior surface of a headband of the headgear 412.

In an embodiment, the angular compensation apparatus further comprises a visor slit 415 extending across the headgear visor 414 proximate to a junction between the visor 414 and the crown. The cylindrically-curved lens 420 passes through the visor slit 415 during deployment and retraction. The first and second lens securing apparatuses 432a, 432b travel along paths positioned at lateral ends of the visor slit 415.

In an embodiment, the angular compensation apparatus further comprises a locking mechanism configured to retain at least one lens securing apparatus 432 at one or more positions along the compensation mechanism. In such embodiment, the locking mechanism comprises a flexible locking tab 1045 with locking teeth 1047 and a corresponding locking ridge 1049 on the at least one lens securing apparatus 432. The locking teeth 1047 engage the locking ridge 1049 to provide multiple discrete angular positions with tactile feedback. In such embodiment, the locking mechanism can further include cam or ramp geometry 678 configured to assist return of the lens securing apparatus 432 from a compensated angular position toward a neutral position during release actuation. Deflection of the locking mechanism contacts a surface of the lens securing apparatus 432 and imparts a force urging the lens securing apparatus 432 to rotate out of a locked angular orientation.

In an embodiment, the angular compensation apparatus further comprises a retraction system. The retraction system comprises a constant force spring housing 472 providing retraction force and a tether cable 474 routed through the guide rail 434 to an attachment point 476 on at least one lens securing apparatus 432. The spring of the housing 472 maintains upward bias to automatically retract the lens securing apparatus 432 when disengaged.

In an embodiment, the compensation mechanism is configured as one of a multi-position curved path system, a single-position system, a two-piece articulating system, and a dual-position system. In the multi-position curved path system, each guide rail 434 includes a curved transition section 1035, and the lens securing apparatus 432 includes upper and lower guide protrusions 1038, 1039 and a locking ridge 1049 engaging locking teeth 1047. In the single-position system, each guide rail 434 includes a rounded cutout 1042 at a lower exterior portion and a rotation stop surface 1041, the lens securing apparatus 432 includes a single cylindrical guide protrusion 1040 configured to pivot within the guide rail 434, and a single locking detent retains the lens securing apparatus 432. The two-piece articulating system comprises a rail interface member 562 and an independently pivoting lens holding member 564. The rail interface member 562 maintains vertical orientation in the guide rail 434. The independently pivoting lens holding member 564 is connected by an internal pivot joint 566, with a flexible locking tab 1045 having a larger protrusion engaging the rail interface member 562 for vertical position lock and a smaller angled protrusion engaging ratcheting teeth 568 on the lens holding member 564 for angular position lock. In the dual-position system, the lens securing apparatus 632 has a cylindrical pivot portion 1134 with angular position cutouts 1136, and a locking tab assembly 610 comprises a main locking tab 612 for position retention and lesser locking tabs 618a, 618b for angular position locking.

In an embodiment, the compensation mechanism comprises a dual-position graduated release system. The dual-position graduated release system comprises a lens securing apparatus 632, a guide rail 434, and a locking tab assembly 610. The lens securing apparatus 632 has a cylindrical pivot portion 1134 with angular position cutouts 1136 and a rotation-enabling protrusion 1138. The guide rail 434 has a straight vertical section 1036 constraining the rotation-enabling protrusion 1138 to prevent lens securing apparatus 632 rotation during vertical travel, and a rotation-enabling cutout 1142 at a lower portion providing clearance for the rotation-enabling protrusion 1138 to move arcuately. The locking tab assembly 610 comprises a main locking tab 612 engaging the cylindrical pivot portion 1134 for position retention, and paired lesser locking tabs 618a, 618b configured to engage the angular position cutouts 1136 when the lens securing apparatus 632 is rotated to a compensated angular position. The lens securing apparatus 632 is selectively positionable in a neutral position with approximately 0° angular compensation and a compensated position with angular compensation.

In such embodiment, the locking tab assembly 610 can further comprise a release lever 614 extending from the main locking tab 612 and lateral actuator protrusions 616 extending horizontally from the main locking tab 612 and positioned to contact the lesser locking tabs 618a, 618b upon actuation of the release lever 614. Partial actuation of the release lever 614 deflects the lesser locking tabs 618a, 618b to disengage from the angular position cutouts 1136 while the main locking tab 612 remains engaged with the cylindrical pivot portion 1134, permitting angular adjustment without full retraction. Full actuation of the release lever 614 disengages the main locking tab 612 from the cylindrical pivot portion 1134, permitting full retraction of the lens securing apparatus 632.

In an embodiment, each lens securing apparatus 432 comprises a lens attachment feature configured to releasably secure the cylindrically-curved lens 420. The lens attachment feature comprises an angled locking geometry 1160 configured to engage a corresponding cutout 1162 formed in the lens 420. The lens 420 is installed by flexing the lens securing apparatus 432 and snapping the lens 420 into the locked position, and removed by flexing the lens securing apparatus 432 to disengage the angled locking geometry 1160 from the lens cutout 1162.

In an embodiment, the crown-to-visor angle 588 is 92-98° and the cylindrically-curved lens 420 has a width of 140-160 mm.

In an embodiment, a graduated release mechanism for an angular compensation apparatus comprises a main locking tab 612, and paired lesser locking tabs 618a, 618b. The main locking tab 612 has an angled engagement surface 620 configured to engage a cylindrical pivot portion 1134 of a lens securing apparatus 632, a release lever 614, and lateral actuator protrusions 616. The paired lesser locking tabs 618a, 618b are positioned laterally of the main locking tab 612 and are configured to engage angular position cutouts 1136 in the cylindrical pivot portion 1134. The lateral actuator protrusions 616 are positioned to deflect the lesser locking tabs 618a, 618b upon partial actuation of the release lever 614. Partial actuation of the release lever 614 disengages the lesser locking tabs 618a, 618b from the angular position cutouts 1136 while maintaining engagement of the main locking tab 612 with the cylindrical pivot portion 1134. Full actuation of the release lever 614 disengages the main locking tab 612 from the cylindrical pivot portion 1134.

In an embodiment of an integrated headgear system, the integrated headgear system comprises a snapback or trucker style hat 412, a visor slit 415, a retractable cylindrically-curved lens 420, paired guide rails 434a, 434b, paired lens securing apparatuses 432a, 432b, and the angular compensation apparatus as discussed in previous paragraphs. The snapback or trucker style hat 412 has a crown-to-visor angle 588 of 90-105°. The visor slit 415 extends across the visor 414 proximate to the crown of the snapback or trucker style hat 412. The retractable cylindrically-curved lens 420 has a width configured to span substantially between the lateral sides of the headgear crown. The paired guide rails 434a, 434b are mounted on opposite lateral sides of the crown. The paired lens securing apparatuses 432a, 432b are each configured to travel within a corresponding guide rail 434a, 434b and to secure a respective end of the lens 420. In such embodiment, users can naturally tilt the hat 412 upward for comfort and visibility while the apparatus maintains proper lens 420 positioning substantially parallel to the user's facial plane 586.

A method for accommodating natural user behavior when wearing eyewear with headgear, can comprise steps of: providing a mounting structure 410 comprising paired guide rails 434a, 434b positioned on opposite lateral sides of headgear 412 having a vertical crown profile; securing opposite ends of a cylindrically-curved lens 420 to corresponding lens securing apparatuses 432a, 432b; guiding the lens securing apparatuses 432a, 432b through the paired guide rails 434a, 434b and through a visor slit 415; and achieving angular compensation sufficient to maintain the cylindrically-curved lens 420 substantially parallel to a user's facial plane 586 through synchronized movement of both lens securing apparatuses 432a, 432b through curved or articulating sections of their respective guide rails 434a, 434b.

First Example Embodiment: Multi-Position Curved Path System

The apparatus comprises paired guide rails 434a, 434b positioned on opposite lateral sides of the headgear crown, with corresponding lens securing apparatuses 432a, 432b configured to travel within their respective rails. Each lens securing apparatus 432 comprises: an upper guide protrusion 1038, positioned on upper portion of LSA sides and rides in internal channel 1037; a lower guide protrusion 1039, positioned on lower portion of LSA sides and rides in internal channel 1037; a locking ridge 1049, which is a single protruding ridge on back of LSA for engagement with locking teeth 1047; and a lens attachment feature for securing respective end of cylindrically-curved lens 420.

The lens securing apparatus 432, 632 includes a lens attachment feature configured to secure a respective end of the cylindrically-curved lens 420. Multiple attachment configurations are contemplated, which are: 1) snap-fit engagement, 2) friction-fit engagement, 3) threaded fastener attachment, 4) adhesive attachment, and 5) integrated construction. In the snap-fit engagement configuration, the lens attachment feature comprises an angled locking geometry 1160 configured to engage a corresponding cutout or notch 1162 formed in the lens 420. This configuration provides tool-free lens installation and removal, enabling users to swap lenses for different lighting conditions. The snap-fit engagement configuration is preferred for consumer applications. In the friction-fit engagement configuration, a slot or channel 1164 is sized to receive the lens edge with an interference fit. In the threaded fastener attachment configuration, a threaded bore is configured to receive a fastener 1166, suitable for high-vibration or impact environments. In the adhesive attachment configuration, a bonding surface is provided for permanent assembly. In the integrated construction configuration, the lens 420 and lens securing apparatuses 432a, 432b are manufactured as a unitary assembly.

The dimensions provided herein represent one functional configuration validated through prototype construction using additive manufacturing methods. Production embodiments utilizing injection molding may achieve body envelopes of approximately 8-10×22-26×8-10 mm. Stamped sheet metal construction may achieve approximately 5-8×20-24×5-8 mm. All dimensional ranges are intended as representative values, and variations of ±20% or more may maintain equivalent functionality depending on material selection and manufacturing method.

Example features for guide rails 434a, 434b may be 70-80 mm total height, upper 80-90% of travel for straight vertical section 1036, 12-16 mm radius for curved transition section 1035, 8-10 mm curve length, and 3.0-3.5 mm internal channel 1037 width.

The locking mechanism for each guide rail 434 comprises a flexible locking tab 1045 positioned at lower portion of rail with locking teeth 1047. The locking teeth 1047 have triangular profile (angled surface on top allows downward ratcheting, flat surface on bottom prevents upward movement under tether tension), providing 5-7 discrete positions. Corresponding locking ridge 1049 on the lens securing apparatus 432 engages with locking teeth 1047. Alternative locking mechanisms may be spring-loaded detents, ball-and-detent mechanisms, magnetic retention systems, cam-lock mechanisms, over-center toggle latches, or friction-fit arrangements. In embodiments with multiple discrete locking positions, the first locking position may provide minimal or zero angular compensation, allowing user selection between an uncompensated position and various compensated positions. The range of angular compensation may span from approximately 0° to 45°.

Operation sequence for multi-position curved path system can be: 1) deployment, 2) straight travel, 3) curve entry, 4) lock engagement, and 5) retraction. During deployment, a user pulls lens 420 downward, causing both lens securing apparatuses 432a, 432b to descend against spring tension from constant force spring housing 472. During straight travel, both LSAs 432a, 432b travel through straight vertical sections 1036, remaining parallel to the rails. During curve entry, as each LSA 432 enters its curved transition section 1035, the guide protrusions 1038, 1039 follow the arcuate path, causing synchronized rotation. During lock engagement, locking teeth 1047 engage with LSA locking ridge 1049, providing discrete angular positions. During retraction, the user flexes tabs 1045 outward, disengaging teeth 1047. Spring housing 472 retracts both LSAs 432a, 432b through visor slit 415 to storage position.

Second Example Embodiment: Single-Position System

The apparatus comprises simplified single-position configuration for each guide rail 434. Single cylindrical guide protrusion 1040 extends through the LSA body, configured to pivot within the internal channel 1037. Rounded cutout 1042 at a lower exterior portion of the guide rail 434 is present for angular positioning. Rotation stop surface 1041 is configured to contact the bridge portion of the LSA 432 to prevent over-rotation. Single locking detent on flexible locking tab 1045 engages LSA 432 when rotated into position. The simplified single-position configuration provides single optimized angular position (typically 10-15°) and can be a most cost-effective implementation.

Third Example Embodiment: Two-Piece Articulating System

The apparatus comprises two-piece configuration for each lens securing apparatus 432. The two-piece configuration comprises a rail interface member 562, a lens holding member 564, an internal pivot joint 566, and a flexible locking tab 1045. The rail interface member 562 maintains vertical orientation in straight guide rail 434 and contains guide protrusions that ride in channel 1037. The lens holding member 564 is pivotally connected to rail interface member 562, and rotates independently to achieve angular compensation. The lens holding member 564 contains ratcheting teeth 568 on its back. The internal pivot joint 566 is perpendicular to the direction of travel and allows lens holding member 564 to rotate while rail interface member 562 stays vertical. The flexible locking tab 1045 has dual-function design. A larger protrusion engages rail interface member 562 for vertical position lock, and a smaller angled protrusion engages ratcheting teeth 568 on lens holding member 564 for angular position lock. This design allows the rail to be straight with no curves since all rotation happens at the pivot joint 566.

Fourth Example Embodiment: Dual-Position Graduated Release System

The apparatus provides two discrete angular positions (0° neutral and approximately 11° compensated) with independent release mechanisms for angular adjustment versus full retraction. The lens securing apparatus 632 of this embodiment comprises a cylindrical pivot portion 1134, angular position cutouts 1136, a rotation-enabling protrusion 1138, and a lens holding portion 1140. The cylindrical pivot portion 1134 is configured to rotate within a corresponding cylindrical bore in the guide rail 434. The angular position cutouts 1136 are formed in the cylindrical pivot portion 1134 and are positioned to align with lesser locking tabs 618a, 618b only when rotated to the compensated position. The rotation-enabling protrusion 1138 extends laterally and is configured to travel within a rotation-enabling cutout 1142 in the guide rail 434. The lens holding portion 1140 is configured to secure one end of the lens 420.

The guide rail 434 for this embodiment includes a straight vertical section 1036 where the rotation-enabling protrusion 1138 is constrained between opposing rail walls, preventing LSA 632 rotation during vertical travel, and a rotation-enabling cutout 1142 at a lower portion providing clearance for rotation. The locking tab assembly 610 for this embodiment comprises a main locking tab 612 and paired lesser locking tabs 618a, 618b. The main locking tab 612 has angled engagement surface 620 for engaging the cylindrical pivot portion 1134, a release lever 614, and lateral actuator protrusions 616. The paired lesser locking tabs 618a, 618b are configured to engage angular position cutouts 1136 when the LSA 632 is in the compensated position.

During operation, partial actuation of the release lever 614 causes the lateral actuator protrusions 616 to deflect the lesser locking tabs 618a, 618b outward, disengaging the angular lock while the main locking tab 612 retains LSA 632, permitting angular readjustment without full redeployment. Full actuation clears main locking tab 612, permitting full retraction. The 11° angular compensation value represents an optimized position for typical vertical crown headgear with crown-to-visor angles 588 of 90-100°. Alternative embodiments may provide different compensation angles by repositioning the angular position cutouts 1136.

Fifth Example Embodiment: Side-Mounted Locking Tab with Synchronized Release

This fifth embodiment provides a side-mounted locking tab configuration optimized for synchronized release across paired guide rails 434a, 434b. The locking tab is positioned on a lateral side of the guide rail 434, and both locking tabs face the same direction (preferably inboard). The guide rail 434 comprises a side-mounted flexible locking tab 670 on a lateral face, configured to deflect outward when disengaged and spring inward when engaging the LSA 632. The lens securing apparatus 632 comprises a side-mounted locking cutout 674 on a lateral face, configured to align with the side-mounted flexible locking tab 670 only when rotated to the angularly compensated position.

The synchronized release mechanism comprises a release actuator 652 and a continuous flexible connector 676 extending from the release actuator 652 along the interior of the headband to both side-mounted flexible locking tabs 670. The flexible connector 676 preferably comprises a spring steel strip having thickness of approximately 0.2-0.5 mm and width of approximately 3-8 mm. Alternative materials include phosphor bronze strip, flexible polymer, or braided stainless steel cable.

In certain embodiments, the locking tab may include cam or ramp geometry 678 configured to assist return of the lens securing apparatus 632 from a compensated angular position toward a neutral position during release actuation. In certain embodiments, the visor slit 415 extends across the headgear visor 414 proximate to the junction between the visor 414 and the crown, configured as a single continuous opening through which the cylindrically-curved lens 420 passes during deployment and retraction.

All embodiments incorporate an embodiment of a tether retraction system. The tether retraction system comprises a constant force spring housing 472, a tether cable 474, and an attachment point 476 on the lens securing apparatus 432. The constant force spring housing 472 is usually positioned at upper rear of guide rail 434, providing 2-5N retraction force. The spring housing 472 may alternatively be positioned on a lateral side of the guide rail 434, or integrated into the body of the guide rail 434. The tether cable 474 is routed over top of rail and down through internal channel 1037, usually 60-100 mm in travel length.

In embodiments utilizing paired guide rails 434a, 434b, a synchronized release system 650 may enable single-point actuation for simultaneous release of both locking mechanisms. The synchronized release system 650 comprises a release actuator 652, a transmission linkage 654, and cam elements 656 at each locking mechanism. The release actuator 652 is positioned at a user-accessible location. The transmission linkage 654 operatively connects the release actuator 652 to both locking mechanisms. The transmission linkage 654 can be implemented as Bowden cable, rigid linkage, or hybrid configuration, or other configurations known in the art.

In reference to FIG. 15A, a side view shows the flare-out problem on a headgear 412 with a visor 414 in tilted-upward position. A cylindrically-curved lens 420 mounted without angular compensation is parallel to a vertical crown face, with a flare-out zone 584 showing lens edges flaring away from temples and a lower lens edge gap 590 between the lens bottom and user's cheek. A reference head profile is included for context.

FIG. 15B is a side view showing a corrected lens 420 position with angular compensation, achieving face-parallel orientation 586 on a headgear 412 with visor 414 in tilted-upward position. Lens securing apparatus 432 is shown in deployed position with a lens 420 passing through a visor slit 415. A reference head profile demonstrating proper lens-to-face alignment with no gap at bottom is shown.

FIG. 15C is an isometric view showing a complete paired rail system on the vertical crown headgear 412 with visor 414 in tilted-upward position. Paired guide rails 434a, 434b are visible on opposite lateral sides of crown, first and second lens securing apparatuses 432a, 432b are in deployed position, cylindrically-curved lens 420 spans between both LSAs and passes through the visor slit 415, and crown graphics area 418 is preserved and clearly visible as shown. A reference head profile is shown for context.

FIG. 16A is an exploded view of a single guide rail assembly showing a guide rail 434 with an internal channel 1037, a curved transition section 1035, a straight vertical section 1036, and a flexible locking tab 1045 with locking teeth 1047. A constant force spring housing 472 at top/rear of the rail 434, a tether cable 474 routed from the housing 472 through the channel 1037, a lens securing apparatus 432 with an upper guide protrusion 1038, a lower guide protrusion 1039, a locking ridge 1049, and a tether attachment point 476, and a partial cylindrically-curved lens 420 showing one end are shown. A second guide rail assembly configured as mirror image on opposite lateral side is also shown.

FIG. 16B is an isometric view of an assembled paired guide rail assembly showing a first guide rail 434a and a second guide rail 434b with a cylindrically-curved lens 420 spanning between a first lens securing apparatus 432a and a second lens securing apparatus 432b in deployed, angularly compensated position.

FIG. 17A is a side view of a single-position system showing a guide rail 434 with a rounded cutout 1042 at a lower exterior portion for angular positioning. A rotation stop surface 1041 is configured to contact a bridge portion of LSA 432 to prevent over-rotation. A lens securing apparatus 432 with a single cylindrical guide protrusion 1040 extends through the LSA body and is positioned within the rounded cutout 1042 for pivoting. A single locking detent on a flexible locking tab 1045 is engaging LSA 432 when rotated into position.

FIG. 17B is a side view cutaway of a two-piece articulating system showing a straight guide rail 434, a rail interface member 562 positioned within the rail 434 maintaining vertical orientation, a lens holding member 564 pivoted to achieve angular compensation, an internal pivot joint 566 connecting the two pieces perpendicular to a direction of travel, a flexible locking tab 1045 with a larger protrusion engaging the rail interface member 562 for a vertical position lock and a smaller angled protrusion engaging ratcheting teeth 568 on the lens holding member 564 for an angular position lock.

FIG. 17C is an exploded view of the two-piece articulating system of FIG. 17B showing the rail interface member 562 with guide protrusions and a cylindrical section, the lens holding member 564 with ratcheting teeth 568 on the back, and the internal pivot joint 566 assembly showing how the lens holding member 564 pivots around the rail interface member 562.

FIG. 18A is a cross-sectional side view of an embodiment of the guide rail 1034 showing a lens securing apparatus in a first position within the straight vertical section 1036, oriented vertically with no angular compensation. The upper guide protrusion 1038 and lower guide protrusion 1039 are aligned vertically within the internal channel 1037.

FIG. 18B is a cross-sectional side view of the guide rail 1034 of FIG. 18A showing the lens securing apparatus in a second position entering the curved transition section 1035, beginning to rotate as the guide protrusions 1038, 1039 follow the arcuate path of the internal channel 1037.

FIG. 18C is a cross-sectional side view of the guide rail 1034 of FIGS. 18A-18B showing the lens securing apparatus in a third position further into the curved transition section 1035 with increased rotation.

FIG. 18D is a cross-sectional side view of the guide rail 1034 of FIGS. 18A-18C showing the lens securing apparatus in a fourth position at full angular compensation.

FIG. 19A is a three-quarter perspective view of a rounded crown headgear for comparison, showing a traditional baseball cap with a curved crown profile, guide rails following the crown curvature naturally, lens in a fully lowered use position, and the crown graphics area visible above the lens.

FIG. 19B is a three-quarter perspective view of the rounded crown headgear of FIG. 19A showing the lens in a partially raised position and the lens blocking and obstructing the crown graphics area, to illustrate the prior art problem where the lens blocks graphics in any position except fully lowered, contrasting with the present invention which operates at or below the visor plane to preserve graphics visibility.

FIG. 20A is an isometric view of a dual-position graduated release system showing a guide rail 434 with a lens securing apparatus 632 in a deployed position, a locking tab assembly 610 with a main locking tab 612 visible, lateral actuator protrusions 616 on sides of the main tab 612, a lesser locking tab 618a visible on one side, a lens holding portion 1140 of LSA 632, and a tether cable 474.

FIG. 20B is a side view cutaway of the dual-position system of FIG. 20A showing LSA 632 at 0° neutral position, a cylindrical pivot portion 1134, the main locking tab 612 engaging the pivot portion 1134, the lesser locking tabs 618a, 618b flexed against the cylindrical surface but not engaged in cutouts, a rotation-enabling protrusion 1138 positioned in a rotation-enabling cutout 1142, and angular position cutouts 1136 visible but not aligned with the lesser tabs 618a, 618b.

FIG. 20C is a side view cutaway of the dual-position system of FIGS. 20A-20B, showing LSA 632 rotated to 11° compensated position, the cylindrical pivot portion 1134, the main locking tab 612 still engaging the pivot portion 1134, the lesser locking tabs 618a, 618b now engaged in the angular position cutouts 1136, and the rotation-enabling protrusion 1138 moved within the rotation-enabling cutout 1142.

FIG. 21A is an isometric view of a side-mounted locking tab embodiment showing a guide rail 434 with a side-mounted flexible locking tab 670 on a lateral face of the rail 434, a lens securing apparatus 632 in an angularly compensated position, a side-mounted locking cutout 674 on LSA 632 aligned with and engaged by the tab 670, a rotation-enabling protrusion 1138 visible, and a lens holding portion 1140.

FIG. 21B is a top schematic view of a synchronized release system 650 showing a first guide rail 434a and a second guide rail 434b, both side-mounted flexible locking tabs 670 facing inboard toward the center, a continuous flexible connector 676 comprising a spring steel strip running between both tabs 670 along a headband interior, and a release actuator 652 positioned on or near one rail assembly, illustrating a single-point actuation releasing both locking mechanisms simultaneously.

Applicant constructed functional prototypes demonstrating the invention's feasibility. An example embodiment of the apparatus prototype has paired guide rails 434a, 434b, each approximately 75-80 mm height and approximately 10 mm thickness, positioned on opposite lateral sides of crown front. The apparatus prototype further comprises internal channel 1037, approximately 3-3.5 mm width, in each rail 434a, 434b. The curved transition section 1035 in each rail 434a, 434b is approximately 14-15 mm radius over approximately 8-10 mm length. The first lens securing apparatus 432a and second lens securing apparatus 432b of the apparatus prototype are each approximately 11×27×12 mm envelope. The locking mechanism of the apparatus prototype has locking teeth 1047 on flexible locking tab 1045 engaging with corresponding locking ridge 1049 on each LSA 432a, 432b. The tether system of the apparatus prototype has a constant force spring housing 472 with 2-5N retraction force via cable 474. The cylindrically-curved lens 420 of the apparatus prototype is approximately 145-150 mm in width x 65-70 mm in height, spanning between paired LSAs 432a, 432b. The visor slit 415 of the apparatus prototype is a single continuous slit extending across the visor 414 at crown junction. The demonstrated angular compensation range 582 is 10-30°. The apparatus prototype confirmed mechanical principle functionality with 5-7 discrete locking positions per rail. Variations within ±10-15% are anticipated to maintain functionality depending on specific headgear geometry and lens selection. Prototype dimensions represent one functional configuration and does not limit the present invention.

The angular compensation required compensation proportional to visor angle and crown-to-visor angle 588 (90-105°). A radius of approximately 14-15 mm was determined through prototyping to provide effective angular compensation for typical vertical crown headgear with 90-100° crown angles 588. The apparatus functions effectively across a range of crown angles (90-105°), lens widths corresponding to various headgear sizes, and angular adjustments.

The guide rail 434 and associated components may be fabricated from injection molded plastic (ABS, polycarbonate, POM, glass-filled nylon), stamped sheet metal (stainless steel, aluminum, zinc-plated steel), or additive manufacturing. For embodiments requiring fine angular increments (2-5° per position), spring steel or stainless steel is preferred for the flexible locking tabs 1045.

The various embodiments and features disclosed herein are intended to be modular and combinable. Non-limiting examples include: the dual-position graduated release system combined with side-mounted locking tabs 670 for synchronized two-position operation; the multi-position curved path system combined with the synchronized release mechanism; any embodiment combined with alternative materials or lens attachment methods.

The indefinite articles “a” and “an,” as used herein in the specification and in the claims, unless clearly indicated to the contrary, should be understood to mean “at least one.”

In the claims, as well as in the specification above, all transitional phrases such as “comprising,” “including,” “carrying,” “having,” “containing,” “involving,” “holding,” “composed of,” and the like are to be understood to be open-ended, i.e., to mean including but not limited to.

A preferred embodiment of the present disclosure has been described with reference to the preferred embodiments illustrated in the attached drawing figures. However, equivalents may be employed and substitutions made herein without departing from the scope of the invention as recited in the claims. Therefore, it will be apparent to those skilled in the art that many changes and modifications may be made without departing from the claimed subject matter in its broader aspects. The appended claims are intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.

Claims

1. An angular compensation apparatus for a cylindrically-curved eyewear on a vertical crown headgear, comprising:

a mounting structure configured for attachment to the vertical crown headgear having a vertical crown profile with a crown-to-visor angle of 90-105°;

at least one lens securing apparatus configured to secure a cylindrically-curved lens having a width configured to span substantially between lateral sides of the vertical crown of the vertical crown headgear;

at least one guide rail configured to receive the at least one lens securing apparatus; and

a compensation mechanism operatively connecting the at least one lens securing apparatus to the mounting structure;

wherein the compensation mechanism provides angular adjustment sufficient to maintain the cylindrically-curved lens substantially parallel to a user's facial plane when a visor of the vertical crown headgear is tilted from a neutral position;

wherein the compensation mechanism operates substantially at or below a nominal visor plane defined by a lower surface of the visor proximate to the guide rails, thereby preserving visibility of crown graphics during use;

wherein for visors having curved profiles, the nominal visor plane is understood as a reference plane approximating the average visor surface geometry in the region of the guide rails; and

wherein the at-or-below limitation applies to deployed locked positions of the lens securing apparatus.

2. The apparatus of claim 1, wherein the mounting structure comprises:

a first guide rail positioned on a first lateral side of the vertical crown;

a second guide rail positioned on a second lateral side of t the vertical crown opposite the first lateral side;

a first lens securing apparatus configured to travel within the first guide rail; and

a second lens securing apparatus configured to travel within the second guide rail;

wherein the cylindrically-curved lens spans between and is operatively connected to both the first and second lens securing apparatuses.

3. The apparatus of claim 2, wherein each of the first guide rail and the second guide rail comprises a curved guide section configured to create angular adjustment through a controlled arcuate path, and wherein the first and second lens securing apparatuses travel synchronously through their respective curved guide sections to maintain uniform angular positioning of the lens.

4. The apparatus of claim 2, further comprising a visor slit extending across the visor proximate to a junction between the visor and the crown; wherein the cylindrically-curved lens passes through said visor slit during deployment and retraction, and wherein the first and second lens securing apparatuses travel along paths positioned at lateral ends of said visor slit.

5. The apparatus of claim 1, further comprising a locking mechanism configured to retain at least one lens securing apparatus at one or more positions along the compensation mechanism.

6. The apparatus of claim 5, wherein the locking mechanism comprises: wherein the locking teeth engage the locking ridge to provide multiple discrete angular positions with tactile feedback.

a flexible locking tab with locking teeth; and

a corresponding locking ridge on the at least one lens securing apparatus;

7. The apparatus of claim 1, further comprising a retraction system comprising: wherein the spring maintains upward bias to automatically retract the lens securing apparatus when disengaged.

a constant force spring housing providing retraction force; and

a tether cable routed through the guide rail to an attachment point on at least one lens securing apparatus;

8. The apparatus of claim 1, wherein the compensation mechanism is configured as one of:

a multi-position curved path system wherein each guide rail includes a curved transition section, and the lens securing apparatus includes upper and lower guide protrusions and a locking ridge engaging locking teeth;

a single-position system wherein each guide rail includes a rounded cutout at a lower exterior portion and a rotation stop surface, the lens securing apparatus includes a single cylindrical guide protrusion configured to pivot within the guide rail, and a single locking detent retains the lens securing apparatus;

a two-piece articulating system comprising a rail interface member maintaining vertical orientation in the guide rail, and an independently pivoting lens holding member connected by an internal pivot joint,

with a flexible locking tab having a larger protrusion engaging the rail interface member for vertical position lock and a smaller angled protrusion engaging ratcheting teeth on the lens holding member for angular position lock; and

a dual-position system wherein the lens securing apparatus has a cylindrical pivot portion with angular position cutouts, and a locking tab assembly comprises a main locking tab for position retention and lesser locking tabs for angular position locking.

9. An integrated headgear system comprising: wherein users can naturally tilt the hat upward for comfort and visibility while the apparatus maintains proper lens positioning substantially parallel to the user's facial plane.

a snapback or trucker style hat with a crown-to-visor angle of 90-105°;

a visor slit extending across the visor proximate to the crown;

a retractable cylindrically-curved lens having a width configured to span substantially between the lateral sides of the headgear crown;

paired guide rails mounted on opposite lateral sides of the crown;

paired lens securing apparatuses each configured to travel within a corresponding guide rail and to secure a respective end of the lens; and

the angular compensation apparatus of claim 1;

10. The apparatus of claim 2, wherein each guide rail comprises: wherein all angular adjustment occurs substantially at or below the nominal visor plane, with an upper edge of each lens securing apparatus positioned approximately level with or just below the nominal visor plane when deployed.

a substantially vertical section for initial travel of the lens securing apparatus; and

an angular adjustment mechanism at a lower portion configured to create angular adjustment;

11. The apparatus of claim 1, wherein the compensation mechanism provides angular adjustment in a range of approximately 5-45°.

12. The apparatus of claim 1, wherein the compensation mechanism provides a plurality of angular positions including a first position with substantially zero angular compensation and one or more additional positions with angular compensation, allowing user selection between an uncompensated position and one or more compensated positions.

13. The apparatus of claim 1, wherein the compensation mechanism comprises a dual-position graduated release system including: wherein the lens securing apparatus is selectively positionable in a neutral position with approximately 0°angular compensation and a compensated position with angular compensation.

a lens securing apparatus having a cylindrical pivot portion with angular position cutouts and a rotation-enabling protrusion;

a guide rail having a straight vertical section constraining the rotation-enabling protrusion to prevent lens securing apparatus rotation during vertical travel, and a rotation-enabling cutout at a lower portion providing clearance for the rotation-enabling protrusion to move arcuately;

a locking tab assembly comprising a main locking tab engaging the cylindrical pivot portion for position retention, and paired lesser locking tabs configured to engage the angular position cutouts when the lens securing apparatus is rotated to a compensated angular position;

14. The apparatus of claim 13, wherein the locking tab assembly further comprises: wherein partial actuation of the release lever deflects the lesser locking tabs to disengage from the angular position cutouts while the main locking tab remains engaged with the cylindrical pivot portion, permitting angular adjustment without full retraction; and wherein full actuation of the release lever disengages the main locking tab from the cylindrical pivot portion, permitting full retraction of the lens securing apparatus.

a release lever extending from the main locking tab; and

lateral actuator protrusions extending horizontally from the main locking tab and positioned to contact the lesser locking tabs upon actuation of the release lever;

15. The apparatus of claim 1, wherein the guide rail is fabricated from a material selected from the group consisting of: injection molded engineering plastic, stamped sheet metal, and additively manufactured polymer.

16. The apparatus of claim 2, further comprising a synchronized release system configured to enable single-point actuation for simultaneous release of locking mechanisms associated with both the first guide rail and the second guide rail, comprising: wherein actuation of the release actuator causes simultaneous disengagement of locking mechanisms at both guide rails, permitting synchronized retraction of both lens securing apparatuses.

a release actuator positioned at a user-accessible location; and

a transmission linkage operatively connecting the release actuator to locking mechanisms at both guide rails;

17. The apparatus of claim 2, wherein each guide rail comprises a side-mounted flexible locking tab positioned on a lateral face of the guide rail, and wherein each lens securing apparatus comprises a side-mounted locking cutout configured to receive the corresponding locking tab when the lens securing apparatus is in an angularly compensated position.

18. The apparatus of claim 17, wherein both side-mounted flexible locking tabs face the same direction, and further comprising a synchronized release mechanism including: wherein actuation of the release actuator deflects both locking tabs outward simultaneously, releasing both lens securing apparatuses for retraction.

a release actuator; and

a continuous flexible connector extending from the release actuator to both side-mounted flexible locking tabs;

19. The apparatus of claim 18, wherein the continuous flexible connector comprises a spring steel strip configured to conform to a curved headband geometry while transmitting release force, the spring steel strip routed along an interior surface of a headband of the headgear.

20. A method for accommodating natural user behavior when wearing eyewear with headgear, comprising:

providing a mounting structure comprising paired guide rails positioned on opposite lateral sides of headgear having a vertical crown profile;

securing opposite ends of a cylindrically-curved lens to corresponding lens securing apparatuses;

guiding the lens securing apparatuses through the paired guide rails and through a visor slit; and

achieving angular compensation sufficient to maintain the cylindrically-curved lens substantially parallel to a user's facial plane through synchronized movement of both lens securing apparatuses through curved or articulating sections of their respective guide rails.

21. A graduated release mechanism for an angular compensation apparatus, comprising: wherein the lateral actuator protrusions are positioned to deflect the lesser locking tabs upon partial actuation of the release lever; wherein partial actuation of the release lever disengages the lesser locking tabs from the angular position cutouts while maintaining engagement of the main locking tab with the cylindrical pivot portion; and wherein full actuation of the release lever disengages the main locking tab from the cylindrical pivot portion.

a main locking tab with an angled engagement surface configured to engage a cylindrical pivot portion of a lens securing apparatus, a release lever, and lateral actuator protrusions; and

paired lesser locking tabs positioned laterally of the main locking tab and configured to engage angular position cutouts in the cylindrical pivot portion;

22. The apparatus of claim 1, wherein each lens securing apparatus comprises a lens attachment feature configured to releasably secure the cylindrically-curved lens, the lens attachment feature comprising an angled locking geometry configured to engage a corresponding cutout formed in the lens, wherein the lens is installed by flexing the lens securing apparatus and snapping the lens into the locked position, and removed by flexing the lens securing apparatus to disengage the angled locking geometry from the lens cutout.

23. The apparatus of claim 5, wherein the locking mechanism includes cam or ramp geometry configured to assist return of the lens securing apparatus from a compensated angular position toward a neutral position during release actuation, wherein deflection of the locking mechanism contacts a surface of the lens securing apparatus and imparts a force urging the lens securing apparatus to rotate out of a locked angular orientation.

24. The apparatus of claim 1, wherein the crown-to-visor angle is 92-98° and the cylindrically-curved lens has a width of 140-160 mm.