Abstract: A knob-driven adjusting mechanism has two fastening belts, one adjusting device, two base seats and two shafts. The fastening belt goes through a long groove. The fastening belt is formed with a tooth row on the side of the long groove. The adjusting device has a shell seat and a knob, and each fastening belt respectively goes through the shell seat. The knob is configured on the shell seat in a rotary form to drive the fastening belts. Each base seat is respectively used for the two side parts configured on an object. The base seat has two protruding support parts. Each shaft is respectively configured on each base seat. The two ends of the shaft respectively goes into each support part in the axial direction. Each shaft is respectively connected to each fastening belt, so that each fastening belt can respectively rotate in relation to the base seat.

Abstract: A helmet comprising: an inner shell; an outer shell; a sliding interface between the inner shell and the outer shell; and a switch configured to be selectively switchable between first and second discrete modes, the first mode allowing relative sliding between the inner shell and the outer shell at the sliding interface in response to an impact to the helmet, the second mode preventing relative sliding between the inner shell and the outer shell at the sliding interface.

Abstract: A helmet for work or sports, including a structure having a substantially convex outer surface and a substantially concave inner surface; a protective body of polystyrene, having a first portion engageable to the inner surface and a second portion having a concavity for receiving the head of a user. The protective body includes: a base element made up of a first material for shock and/or impacts absorption having a predetermined first density value, the base element having a concave surface defining the concavity and a housing cavity facing away with respect to the concave surface; a protective insert made of a second material for shock and/or impact absorption having a second predetermined different density value, preferably lower, than the first density value of the first material, the protective insert being at least partially insertable in the housing cavity.

Abstract: A head-mounted display system includes a head-mounted display unit and a positioning and stabilising structure structured and arranged to hold the head-mounted display unit in an operational position over a user's face in use. The positioning and stabilising structure includes a rear support structure adapted to contact posterior regions of a user's head and a forehead support connector, which includes a forehead support strap, which extends generally along and in the direction of the sagittal plane and connects the rear support structure to a superior edge region of the head-mounted display unit. The forehead support connector further includes a forehead support rigidiser that provides rigidification to a portion of the forehead support connector.

Abstract: A headband assembly, having a preferred orientation relative to a wearer's head, and including a closed form headband adapted to encircle a human head horizontally, thereby defining an inner surface and wherein at least one hard portion of the headband is hard relative to another portion of the headband. Also, a resiliently deformable wingset is supported by the headstrap subassembly on the inner surface, about the hard portion and includes a central part and two wings, each wing extending laterally outwardly from the central part, each wing extending forward as it extends laterally from the central part and having a wing end. A wingset holder, engaged to both the wing ends, so that at least a portion of the holder is suspended between the wing ends, thereby holding a wearer's head away from the hard portion when in use.

Abstract: The disclosed adjustable strap apparatus may include a left strap having a first rack member and a right strap having a second rack member. An electrical unit may have an opening through which a shaft passes. A pinion member may be affixed to a proximal end of the shaft and may be adapted to (a) engage the first rack member and the second rack member and (b) translate the first rack member and the second rack member in opposite directions via rotation of the shaft. A ratcheting member may be coupled to a distal end of the shaft and may include one or more pawls adapted to prevent rotation of the shaft when engaged. Various other methods, systems, and devices are also disclosed.

Abstract: A head-mounted display includes a display host, a head belt base, a first lateral head belt, a second lateral head belt, an auxiliary head belt, a knob, a first driving component and a second driving component. The head belt base is connected to the display host through the first and second lateral head belts and the auxiliary head belt. The knob is pivoted to the head belt base, and the knob is coupled to the first and second lateral head belts through the first driving component and is coupled to the auxiliary head belt through the second driving component. The knob synchronously drives the first and second driving components, to drive the first and second lateral head belts through the first driving component and drive the auxiliary head belt through the second driving component. Alternatively, the knob drives one of the first driving component and the second driving component.

Abstract: There is disclosed a patient restraint assembly including a head restraint configured to extend around the patient's head, at least one securement member (4) extending from the first end of the head restraint, and at least one securement member (5) extending from the second end of the head restraint, said securement members (4, 5) being configured to releasably secure said head restraint to a support table, an adjustment unit (15) to adjust the tension in the securement member(s) (4, 5), wherein adjustment of the adjustment unit (15) applies the same force simultaneously to the securement member(s) (4) at the first end and the securement member(s) (5) at the second end of the head restraint.

Abstract: A ratchet mechanism for a hard hat and method of assembling the same are provided. The ratchet mechanism includes a knob with knob protrusions. The ratchet mechanism also includes a ratchet gear. The ratchet gear includes teeth engagement mechanisms. Each teeth engagement mechanism includes a hooking mechanism and a tooth protrusion. Each hooking mechanism is configured to engage with the knob protrusions. The ratchet mechanism also includes a band housing configured to allow a band to ratchetably move within the housing. The band housing also includes a knob engagement protrusion and a ratchet gear aperture configured with one or more teeth defining a ramped surface. The ratchet gear is disposed on the knob engagement protrusion and includes one or more ratchet gear teeth configured to engage with a set of band teeth on the band, such that the rotation of the ratchet gear tightens or loosens the band during operation.

Abstract: A safety helmet with a helmet shell, with a bearing ring, with a rotatable actuating element (14) and with a transmission unit (15.1, 15.2). The transmission unit (15.1, 15.2) transmits a rotation of the actuating element to the bearing ring, so that the head size provided is changed. A helmet shell-side transmission piece (15.1) is non-rotatably connected to the actuating element (14) such that they rotate in unison, and a bearing ring-side transmission piece (15.2) is connected mechanically to the bearing ring. The helmet shell-side transmission piece (15.1) can move both relative to the actuating element (14) and relative to the bearing ring-side transmission piece (15.2) linearly in two opposite directions. The distance between the actuating element (14) and the bearing ring can be changed thereby.

Abstract: An adjustable helmet includes a main shell having a first side portion, and a second side portion. The first side portion and the second side portion are laterally flexible with respect to one another. The adjustable helmet includes a secondary shell coupled to the main shell at a location between the first side portion and the second side portion. At least a portion of the first side portion and at least a portion of the second side portion each extends over at least a portion of a top surface of the secondary shell. The adjustable helmet includes a tensioning device. A first end of the tensioning device is coupled to the first side portion and a second end of the tensioning device is coupled to the second side portion so as to provide a tension force between the first side portion and the second side portion.

Abstract: A comfortable construction helmet easy to assembly and adjust is revealed. The construction helmet includes a support frame mounted therein and a head cushion fixed on the support frame for allowing a user's forehead to abut against. Left and right straps are extended from two sides of the support frame while an adjustment assembly is disposed between the left and right straps for adjusting the length of the straps. The adjustment assembly includes a base, a rotating member mounted in the base, an outer cap, and a toothed disc arranged over the rotating member and positioned in the outer cap. Two connecting strip are extended from two sides of the rotating member and connected to the left and right straps respectively. The toothed disc which is driven by the outer cap further drives the rotating member to rotate for changing the length of the connecting strips.

Abstract: A binding band adjusting device and a head-mounted display device having the binding band adjusting device are provided. The binding band adjusting device includes a support assembly provided with a through hole, a rotating assembly matching the through hole, two side binding bands connected to the rotating assembly, a trigger assembly disposed on the support assembly and used for being triggered by the rotating assembly, and a front-back binding band that can fix with respect to the trigger assembly; when the rotating assembly rotates in different directions with respect to the through hole, the two side binding bands expand and contract with respect to the support assembly; when the rotating assembly moves in the axial direction of the through hole and triggers the trigger assembly, the trigger assembly loosens or clamps the front-back binding band.

Abstract: A head-mounted device is provided. The head-mounted device includes a longitudinal headband, a horizontal headband unit and a headband adjustment mechanism. The headband adjustment mechanism is connected to the longitudinal headband and the horizontal headband unit. In a first configuration, the headband adjustment mechanism is adapted to adjust the tightness of the horizontal headband unit. In a second configuration, the headband adjustment mechanism is adapted to adjust the tightness of the longitudinal headband.

Abstract: An orthopedic guide that can comprise a base, a first attachment and a second attachment is disclosed. The base can have a plurality of connection features spaced from one another along a longitudinal extent. The base can be configured to seat on a rim of a bone. The first attachment can be selectively coupled to the base at a first end portion thereof and can be selectively coupled to the base at a second end portion thereof. The first attachment can be arch shaped when coupled to the base. The first attachment can define a first plurality of apertures. The second attachment can be selectively coupled to the base at a first end portion thereof and can be selectively coupled to the base at a second end portion thereof. The second attachment can be arch shaped when coupled to the base. The first attachment can define a second plurality of apertures.

Abstract: A helmet attachment may include a body, a connector, and a fastener. The body may have a rim and a concave inner surface configured to engage convex outer surface of a helmet. The connector may be coupled to the inner surface of the body and the connector may be configured to engage a helmet connector. The fastener may extend from the rim and be configured to engage an element coupled to the helmet.

Abstract: A helmet that includes vents in the shell and removable plugs that may be positioned in the vents to provide an airtight seal while maintaining the aerodynamic shape of the helmet. The vent has an outer vent opening in the outer wall surface of the shell and an inner vent opening in the inner wall surface of the shell. The plug includes a resilient lower surface and an upper surface opposite the resilient lower surface. The resilient lower surface has a lower peripheral lip that compresses when the plug is pushed through the outer vent opening and the inner vent opening and that subsequently expands after the lower peripheral lip passes through the inner vent opening so that the lower peripheral lip engages a portion of the inner wall surface of the shell. The upper surface has an upper peripheral lip configured to conform to a portion of the outer wall surface of the shell when the plug is inserted in the vent.

Abstract: Aspects of the present invention are directed to helmet padding systems. One helmet padding system includes a rigid shell and a spacing pad. The rigid shell is configured to cover a top of a user's head and be worn under a baseball cap. The rigid shell includes an opening formed in an area of the rigid shell opposite the front of the user's head when the rigid shell is worn on the user's head. The spacing pad is positioned within the rigid shell. The spacing pad includes a layer of elastomeric material. The helmet padding system may further include the baseball cap positioned overtop the rigid shell. The baseball cap has a cut-out in a rear portion thereof.

Abstract: An adjustment mechanism for allowing a user to adjust a length of a headband includes a stationary case, a clutch, and a knob. The stationary case defines an opening and a circular recess. The clutch includes a cam arranged within the circular recess and a pinion extending axially from the cam such that the pinion is positioned outside the case via the opening to engage with the headband. The clutch also includes a roller located adjacent to a first cam portion of the cam. The knob has an actuating element arranged between the roller and a tab of the cam. The knob is rotatable in a first direction for allowing the user to shorten the length of the headband. The knob is rotatable in a second direction allowing the user to increase the length of the headband.

Abstract: A head-mounted display includes a wearing portion, a display body, a first strap, a second strap, an adjustment assembly, and a switching assembly. The display body is connected to the wearing portion. The first strap and the second strap are respectively connected to two opposite sides of the wearing portion. The first strap, the second strap, and the wearing portion define a wearing space, and the first portion of the first strap and the second portion of the second strap are overlapped with each other. The adjustment assembly is adapted to be coupled to the first strap and the second strap and is configured to adjust the degree of overlap of the first portion and the second portion to thereby change the wearing space. The switching assembly is disposed at the adjustment assembly to switch the adjustment assembly to a coupled state or a decoupled state.

Abstract: A helmet for receiving a head of a hockey or lacrosse player, the helmet comprising a front shell; a rear shell, the rear shell comprising inner and outer surfaces and an elongated slot extending along a longitudinal axis of the helmet; a rear inner pad for facing the back and left and right side regions of the head, the rear inner pad being mounted to the rear shell; an occipital inner pad located below the rear inner pad for facing the occipital region of the head; a central member extending along the longitudinal axis of the helmet, the central member comprising an upper part hingedly mounted with respect to the rear shell and a lower part mounted to the occipital inner pad; and a single wedging member located between the rear shell and the central member, the single wedging member being movable along the longitudinal axis of the helmet from a first position to a second position wherein, in use, in the first position, the occipital inner pad applies a first pressure upon the occipital region of the head, a

Abstract: A head-mounted display device includes a wearable assembly, at least one cushion and at least one adjustable fixing assembly. The wearable assembly is adapted to be worn on a head of a user. The at least one cushion is floatingly connected to the wearable assembly and contact the head of the user. The at least one adjustable fixing assembly includes a first positioning structure and a second positioning structure. The first positioning structure is connected to the wearable assembly, and the second positioning structure is connected to the at least one cushion. A structural interference generated between the first positioning structure and the second positioning structure positions the at least one cushion to the wearable assembly.

Abstract: A head-mounted-display adjustment apparatus may include a strap that includes (1) a proximal section coupled to a proximal area of a head-mounted display and (2) a distal section coupled to a distal area of the head-mounted display in a manner that holds the head-mounted display, when being worn by a user, against the user's face. The apparatus may also include a spring that couples the proximal section of the strap to the proximal area of the head-mounted display. In addition, the apparatus may include an adjustment mechanism connected to the spring such that (1) actuation of the adjustment mechanism adjusts the spring and (2) adjusting the spring changes an amount of force that the head-mounted display, when being worn by the user, applies to the user's face. Various other head-mounted-display adjustment devices, systems, and methods are also disclosed.

Abstract: A head-mounted resilient auxiliary locking mechanism and a head-mounted display, wherein the mechanism comprises a connecting band (3), a rear housing (1) provided at a rear of the connecting band (3), a locking module (4) provided in the rear housing (1), racks (2) provided at the two ends of the connecting band (3) and inserted into the rear housing (1) to engage with the locking module (4), and a resilient band (7) connected between the connecting band (3) and the rear housing (1); when the locking module (4) locks the racks (2), the resilient band (7) prevents the engaging between the racks (2) and the locking module (4) from loosing; and when the locking module (4) releases the racks (2), the resilient band (7) drives the racks (2) to return. The head-mounted display comprises a display (8) and the head-mounted resilient auxiliary locking mechanism.

Abstract: A head-mounted display device including a front piece, a plurality of headbands, and an adjustment mechanism is provided. The front piece is provided with or adapted to house a display device. An end of each of the headbands is connected to the front piece. The adjustment mechanism includes a base, a turntable, and a knob. The turntable and the knob are pivoted to the base on an axis of rotation. The turntable has a plurality of satellite points. Each of the satellite points is spaced apart from the axis of rotation, and another end of each of the headbands is connected to the corresponding satellite point. By turning the knob to rotate the turntable, the headbands are wound around the periphery of the satellite points to simultaneously reduce the length of use of the headbands.

Abstract: A head-mounted display includes a body, a bearing base, a knob, a guiding element, and a head belt set. The knob is pivoted to the bearing base and located outside the bearing base. The guiding element is pivoted to the bearing base and located inside the bearing base and is configured to be driven by the knob to rotate. The guiding element includes a first gear and a second gear. The head belt set connects the body and the bearing base. The head belt set includes a first side head belt, a second side head belt, and an auxiliary head belt. The first gear is configured to drive the first side head belt and the second side head belt to move. The second gear is configured to drive the auxiliary head belt to move.

Abstract: An impact absorbing liner apparatus and impact reduction apparel are disclosed. An impact absorbing liner has a size and a configuration, such as multiple extending impact absorbing members, which can be formed and shaped around a part of a wearer's body. The impact absorbing liner is at least partially obscured from external view by apparel worn over the part of the wearer's body. The apparatus further includes a rigid frame connected with the impact absorbing liner and having at least a distal end and a proximal end. The distal end and proximal end each have a connection mechanism to connect together to provide the size and the configuration for the impact absorbing liner, and to conform to the impact reduction apparel.

Abstract: An adjustable strap and a head mounted display device are provided. The adjustable strap includes a body, a sliding member, a limiting member, and an engaging member. The body has a slot section and a control section. The slot section has a slot and an engaging portion. The control section has a through hole. The slot section and the control section overlap. The sliding member and the limiting member pass through the slot and the through hole for connection. The engaging member and the control section pass through the slot for fixed connection. The sliding member and the limiting member are configured to slide between a first end and a second end of the through hole. When the sliding member and the limiting member are at the first end, the limiting member restricts an engaging end of the engaging member to be away from the engaging portion, such that the slot section and the control section are relatively slidable.

Abstract: A belt connection structure of a wearable product is provided. A first transmission rack is provided on a side wall of a first elongate hole. A second transmission rack is provided on a side wall of a second elongate hole facing the first transmission rack. A gear is engaged with the first and second transmission racks respectively. A connecting member coaxial with the gear is provided on a side surface of the gear. A sleeve communicating with a slide way is provided on the outer side wall of an outer cover. The inner side wall of the sleeve is provided with teeth extending in the axial direction. At least two annular grooves are formed on the outer side wall of the sleeve. A belt button is mounted on the sleeve, and comprises a pressing portion and a connecting column. The pressing portion and the connecting column are slidable in the axial direction but are not rotatable relative to each other. Position limiting teeth are provided on the outer side surface of the connecting column.

Abstract: A helmet that includes vents in the shell and removable plugs that may be positioned in the vents to provide an airtight seal while maintaining the aerodynamic shape of the helmet. The vent has an outer vent opening in the outer wall surface of the shell and an inner vent opening in the inner wall surface of the shell. The plug includes a resilient lower surface and an upper surface opposite the resilient lower surface. The resilient lower surface has a lower peripheral lip that compresses when the plug is pushed through the outer vent opening and the inner vent opening and that subsequently expands after the lower peripheral lip passes through the inner vent opening so that the lower peripheral lip engages a portion of the inner wall surface of the shell. The upper surface has an upper peripheral lip configured to conform to a portion of the outer wall surface of the shell when the plug is inserted in the vent.

Abstract: A football helmet is disclosed that includes a shell constructed of fiber reinforced epoxy resin, a thin resilient outer liner adjacent the inner shell surface, a thicker resilient middle liner and a thin resilient inner liner. The three liners are preferably fabricated from expanded polypropylene or suitable substitute having comparable resilient energy absorbing properties. The inner and outer liners are made from higher impact absorbing material than the impact absorbing material of the middle liner. The helmet also includes fitment pads, jaw pads, a face mask, and moisture absorbing cloth material.

Abstract: The present invention provides a helmet comprising a main body having a concave interior for receiving a user's head, a head strap coupled to the body, and an adjustment mechanism coupled to the head strap. The head strap is positioned in a loop that spans at least 1.5 wraps around the interior of the main body. Preferably, the head strap is fully recessed into the concave interior of the main body. The head strap can include an occipital pad and a flexible belt (e.g., two flexible belts) secured to the occipital pad and engaged with the adjustment mechanism. Preferably, at least a portion of the flexible belt is spaced rearward from the occipital pad. The helmet can further include a belt guide (e.g., two side belt guides and a front belt guide) secured to the main body and adapted to allow the head strap to slide through the belt guide.

Abstract: An adjustment structure of a bridle including a bridle, rotating shaft, and a knob is provided. The bridle has a rack. The rotating shaft has a first ring gear and a second ring gear both around an axis, wherein the first ring gear is coupled to the rack, such that the rotating shall moves along the bridle by rotating about the axis itself. The knob is rotated about the axis and moved along the axis to be movably coupled to the rotating shaft. The knob has a third ring gear to be engaged with or released from the second ring gear by the knob moving along the axis. When the third ring gear is engaged with the second ring gear, the knob is forced to drive the rotating shaft to rotate about the axis.

Abstract: Embodiments provide a retention apparatus for a head-mounted device and a head-mounted apparatus including the retention apparatus and the head-mounted device. The retention apparatus includes left and right band portions arranged on respective sides of a user's head, which connect to the head-mounted device at one end, and include opposing free ends that are arrangeable toward a back side of the wearer's head. The retention apparatus includes left and right elastic straps and an adjustment mechanism. The adjustment mechanism is arrangeable at the back of the user's head and includes arms the telescope into and out of the adjustment mechanism. The elastic straps are attached to the left and right band portions at first ends and to respective arms of the adjustment mechanism at second ends. Adjustably moving the arms of the adjustment mechanism stretches or relaxes the elastic straps, adjusting tension of the retention apparatus.

Abstract: A helmet having a chin bar fastened at two points on each side of the shell. The shell is molded with recessed portions designed to receive the two branches of the chin bar on each side where they will be fastened to the shell so that the outer surfaces of the chin guard are flush with the shell at the locations of attachment to provide a smooth transition and reduce weight. An adjustment device to adjust the fit of the helmet to the user includes a star wheel on each side of the helmet attached to an arcuate flexible strip extending rearwardly around the occipital area of the skull. A sliding mechanism attached to the strip allows the strip to be moved forward and backward to allow it to be tightened or loosened, respectively, with respect to the player's head. A ratcheting lateral adjustment device is also disclosed.

Abstract: The present invention relates to a headband including an adjustment band which is worn on a wearer's head and has the length adjusted; a support band which is connected to the adjustment band and is supported on the upper part of the wearer's head; and a length adjustment lever for adjusting the length of the adjustment band, wherein a cushion case of a flexible resilient material is integrally formed on the length adjustment lever.

Abstract: A protective headgear device including a fabric cap (102) into which a hard shell (120) of reinforced fibers is inserted. A foam liner 140 or foam inserts (1500) are secured to the hard outer shell 120 and serve a shock absorbing function. The foam liner (14) and/or foam inserts (120) include or form grooves and/or channels used to direct hot air towards the top center of the headgear assembly where the hot air can be vented through holes which extend through the cap (102) and hard outer shell (120). The holes may pass through the foam liner 140 or meet up with holes on channels in or between the foam inserts through which air can pass. The hard outer shell may be thinnest on top and thicker on the left and right sides. The center front and rear may be the same thickness as the top of the hard shell.

Abstract: A football helmet including a one-piece outer shell defining an exterior and an interior. The shell includes a plurality of slots penetrating at least partially through the shell from the exterior to the interior of the shell. Each slot may be disposed adjacent to at least one other slot and each pair of adjacent slots defines an energy absorbing beam portion between the adjacent slots. Each beam portion is configured to deform and absorb energy when the exterior of the shell is impacted from a normal direction.

Abstract: A hockey or lacrosse helmet with a rear shell having a central elongated slot extending along a longitudinal axis of the helmet; a rear inner pad for facing the back and left and right side regions of the head, the rear inner pad being mounted to the rear shell; an occipital inner pad located below the rear inner pad for facing the occipital region of the head; and a single wedging member located between the rear shell and the occipital inner pad, the single wedging member being movable along the longitudinal axis of the helmet from a first position to a second position.

Abstract: A helmet can include a helmet body formed of a foam energy-absorbing material in which the helmet body includes inner and outer opposing surfaces. A plurality of lower slots can be formed completely through the helmet body and can be open at a lower edge of the helmet body. A plurality of upper slots can be formed completely through the helmet body and be open at a top portion of the helmet body to form a star shape. An S-shaped panel of the helmet body can include an undulating form from the alternating and overlapping positions of the plurality of lower slots and the plurality of upper slots. A reinforcing halo can be disposed within the helmet body to reinforce areas of weakness in the helmet body resulting from the plurality of lower slots and the plurality of upper slots.

Abstract: The present invention relates to the technical field of massagers and provides a head massager and a helmet size adjusting structure thereof.

Abstract: According to an embodiment, a method of assembling a reel includes coupling a drive component with a tightening component and coupling the tightening component with a top end of a housing. A spool component is then inserted within a bottom end of the housing so that the spool component is positioned within the housing's interior region and faces a bottom surface of the drive component. An attachment component is then coupled with the bottom end of the housing. The attachment component includes a coupling member that couples with the drive component. Coupling of the coupling member with the drive component operationally couples the drive component and the spool component so that operation of the tightening component causes the spool component to rotate within the housing in a first direction while preventing rotation of the spool component in a second direction.

Abstract: An integrated fit and retention system is provided that includes a first rigid strap and a second rigid strap, each having a first end and a second end. The first end of each rigid strap is coupled to a helmet body proximate a front of the helmet body, and the second end of each rigid strap is coupled to the helmet body proximate a rear of the helmet body. The integrated fit and retention system also includes a chin strap operable to couple the first and second rigid straps beneath a chin of a wearer. In particular embodiments, the integrated fit and retention system may further include a fit strap coupling the first and second rigid straps, that may be configured to sit below an occipital lobe of the wearer.

Abstract: The impact protection cap manufactured from a bendable synthetic material comprises at least one middle shell (3), connected in the forehead area of the wearer by means of flexible areas (12, 13) to lateral shells (1, 2) appended to the sides thereof, characterized in that the lateral shells (1, 2) extend at least partially over the middle shell (3) thereby building overlapping areas (22, 22?) wherebetween ventilation slots (7, 8) are formed.

Abstract: A novelty apparel includes multiple attached conformable, selectable and viewable occupational role playing indicia. A baseball cap includes a dome shaped crown of compound curves and a forward facing sun visor brim portion, a transparent window in a central front face portion of the dome shaped crown, where the window displays a single indicium selectable from a number of different indicia carried on a display surface conformable to said dome shaped crown. The selected indicium is displayed centered above the brim. The display surface conforms to the curved interior of the dome shaped crown, wherein the baseball cap does not deviate substantially from the look of a typical baseball cap with a single permanent indicium.

Abstract: An adjustment mechanism for a headband arrangement having a headband member with a notched track positioned on an end thereof, the adjustment mechanism including: a rotatable knob having a first contact member and a second contact member; and a rotatable hub member having a gear portion with teeth to engage the notched track of the headband member, such that rotation of the hub member in a first direction causes the headband member to tighten and rotation of the hub member in a second direction causes the headband member to loosen; wherein, upon rotation of the knob in the first direction, contact between the first contact member and the hub member causes the hub member to rotate in the first direction, and upon rotation of the knob in the second direction, contact between the second contact member and the hub member causes the hub member to rotate in the second direction.

Abstract: An accessory for a hat is disclosed which a wearer can use to show support for a team, cause or event and/or to protect the wearer from rain and damaging UV rays. In particular, the hat accessory may receive a protective covering with printed indicia on the exterior surface thereof. The protective covering may also be coated with a water repellent and also embedded with a treatment for UV protection. The protective covering may be removably attachable to the hat accessory so that the wearer can show support to a particular team, event or cause depending on the circumstances.

Abstract: An adjustable headband device for a helmet has a base, a headband, a driven wheel, a resilient element, a cover plate and an adjusting knob. The headband is mounted on the base and has two toothed racks. The driven wheel has a gear engaging the toothed racks, multiple engaging tabs and multiple ratchet pawls. The cover plate is mounted on the base and has multiple ratchet teeth selectively engaging the ratchet pawls. The adjusting knob of the adjustable headband device rotates to control increase and decrease of an inner diameter defined by the looped headband without being depressed.

Abstract: A head circumference adjustment device of a helmet includes: a main body formed with a cavity; an annular strap having a first end and a second end passing through the cavity, each of the first and second ends being formed with a rack section, a thumb section and a shoulder section; and a controller mounted in the cavity. The controller has a gear engaged with the rack sections of the strap. By means of rotating the controller, the position of the strap can be adjusted to adjust the head circumference. The head circumference adjustment device can be easily operated and truly fixed to overcome the shortcomings existing in the conventional adjustment device that the strap is likely to slip and the position of the strap can be hardly truly adjusted and the strap is likely to detach from the adjustment device.

Abstract: An adjustable hockey helmet includes a front shell that is longitudinally movable relative to a rear shell to adjust the length of the helmet. One or more substantially rigid straps or similar elements are attached to the front shell and extend to the interior of the rear shell. A cam mechanism or similar device is included on the rear shell for securing the straps directly or indirectly against the interior of the rear shell to prevent longitudinal movement of the front shell relative to the rear shell once the helmet is adjusted to a desired length. Alternatively, the one or more straps may be attached to the rear shell and the cam mechanism may be included on the front shell.