ADJUSTABLE-BARREL CURLING IRON
An adjustable barrel, a barrel-adjustment assembly, and an adjustable distal tip assembly. The barrel is radially adjustable between an expanded position and a contracted position having different diameters. The barrel-adjustment assembly includes a barrel cam, a gear-set, and a rotary adjustment ring. The barrel cam rotates to unwrap and wrap the barrel thereabout between the expanded and contracted positions. The gear-set rotationally drives the barrel cam. The adjustment ring can be longitudinally translated from a disengaged position to an engaged position. In the disengaged position the gear-set is disengaged (but an anti-rotation assembly is engaged) and in the engaged position the gear-set is engaged (and the anti-rotation assembly is disengaged). Once in the disengaged position, the adjustment ring can be rotated, which causes the engaged gear-set to rotate the barrel cam, which in turn wraps and unwraps the barrel about the cam into increased or decreased diameters.
This application claims the priority benefit of U.S. Provisional Patent Application Ser. No. 61/241,526, filed Sep. 11, 2009, which is hereby incorporated herein by reference.
BACKGROUNDMany women use electric hair-care appliances such as hair dryers, flat irons, and curling irons to style their hair. Conventional curling irons have a heated barrel that is used to create curls in the hair. Different-sized curls are sometimes desirable to create different styles suited for an occasion, outfit, trend, preference, current hair-length, etc. To create different-sized curls, different-sized curling iron barrels must be used. Thus, in order to be able to style their hair with different-sized curls, many women have several different curling irons each with a different-sized barrel. However, many women have limited storage space for curling irons and other hair-care appliances, and arranging for sufficient storage space can be a real problem.
In addition, there are usually a limited number of electrical outlets available in bathrooms, where most hairstyling is done. For women who use multiple electric hair-care appliances, it's common to add plug-in outlet expansions and/or power strips. This can lead to a potential safety hazard by too much current draw interfering with GFCI operation and/or causing circuit overloads.
Accordingly, it can be seen that there exists a need for a better way for women to conveniently and safely create different-sized curls in their hair. It is to the provision of solutions to this and other problems that the present invention is primarily directed.
SUMMARYThe present invention relates to adjustable-barrel curling irons for curling hair into different-sized curls. In one example embodiment there is provided a curling iron comprising a handle, a pivotal clip, a barrel-adjustment assembly, and an adjustable end assembly. The barrel-adjustment assembly comprises an adjustment ring, a fixed ring, an adjustable diameter barrel, and a barrel cam, wherein the adjustment ring and the fixed ring can be manipulated to change the diameter of the barrel by wrapping the barrel upon the barrel cam. The barrel is a coiled sheet comprising a flexible heating element. The adjustable end assembly comprises a plurality of fan blades, constructed to provide coverage for the end of the barrel as the diameter of the barrel is changed.
In other example embodiments, adjustable-barrel curling irons are provided with adjustable heated fingers, a telescoping barrel, a swappable/invertible barrel, an extending heated coil barrel, and a woven cylinder barrel.
These and other aspects, features, and advantages of the invention will be understood with reference to the drawing figures and detailed description herein, and will be realized by means of the various elements and combinations particularly pointed out in the appended claims. It is to be understood that both the foregoing general description and the following brief description of the drawings and detailed description of the invention are explanatory of example embodiments of the invention, and are not restrictive of the invention, as claimed.
The present invention may be understood more readily by reference to the following detailed description of the invention taken in connection with the accompanying drawing figures, which form a part of this disclosure. It is to be understood that this invention is not limited to the specific devices, methods, conditions, or parameters of the example embodiments described and/or shown herein, and that the terminology used herein is for the purpose of describing particular embodiments by way of example only. Thus, the terminology is intended to be broadly construed and is not intended to be unnecessarily limiting of the claimed invention. For example, as used in the specification including the appended claims, the singular forms “a,” “an,” and “the” include the plural, the term “or” means “and/or,” and reference to a particular numerical value includes at least that particular value, unless the context clearly dictates otherwise. In addition, any methods described herein are not intended to be limited to the sequence of steps described but can be carried out in other sequences, unless expressly stated otherwise herein. Any and all patents and other publications identified in this specification are incorporated by reference as though fully set forth herein.
With reference now to the drawing figures, wherein like reference numbers represent corresponding parts throughout the several views,
The handle 12 can be of a conventional type used in commercially available curling irons, with a generally cylindrical and elongated shape, as depicted. A user interface 13 and controls (not shown) are included, for example, as part of the handle 12. The user interface 13 and controls can be of a conventional type used in commercially available curling irons, for example, including a temperature control circuit for controlling the temperature, an on/off switch, and other operational controls of the curling iron 10.
The pivotal clip 14 can be of a conventional typical used in commercially available curling irons. Thus, the pivotal clip 14 is pivotally coupled to a fixed component of the curling iron 10 so it can pivot between an open position (not shown) and a closed position (see
The barrel-adjustment assembly 20 is located at the distal end portion of the handle 12 and the proximal end portion of the barrel 26. The barrel-adjustment assembly 20 includes a fixed ring 24, a rotary adjustment ring 22, a rotation-transferring linkage such as an adjustment gear-set 34, and a barrel cam 28. These components can be made of a material such as a hard plastic material.
The fixed ring 24 is fixedly attached to a stationary component of the curling iron 10. For example, the fixed ring 24 can be fixedly attached to the handle 12 by a center connection rod along the longitudinal axis of the curling iron 10 (not shown) or by conventional connecting structures as would be understood by persons of ordinary skill in the art.
The rotary adjustment ring 22 is positioned adjacent the fixed ring 24, for example, between the handle 12 and the fixed ring. In addition, the rotary adjustment ring 22 is rotationally and translationally mounted to a stationary component of the curling iron 10, for example, the handle 12. For example, the rotary adjustment ring 22 can include a circumferential flange 35 that rotationally mounts it to the handle 12 and a clutch-plate spring 31 that translationally mounts it to the handle. In this way, the rotary adjustment ring 22 rotates (as indicated by the rotary directional arrows of
The rotary adjustment ring 22 axially translates between an engaged position (see
The adjustment ring 22 further includes an anti-rotation assembly that prevents it from rotating when in the engaged position. The anti-rotation assembly includes at least one protrusion that either extends distally from the rotary adjustment ring 22 to engage a stationary component of the curling iron 10 such as the fixed ring 24 (as depicted), or that extends proximally from a stationary component of the curling iron such as the fixed ring to engage the rotary adjustment ring 22. In a typical embodiment, for example, the anti-rotation assembly includes a plurality of evenly spaced protrusions 23 arranged in a circle on the distal surface of the clutch plate 21 that are received in a plurality of alignable recesses 25 on the proximal surface of the fixed ring 24 (see
In alternative embodiments, the protrusions extend proximally from the fixed ring and the recesses are formed in the distal surface of the clutch plate. And in other alternative embodiments, the at least one protrusion of the anti-rotation assembly is provided by a pawl of a ratchet assembly, a tab or hook, or another protruding structure that selectively interferes with another element to prevent rotation of the adjustment ring 22 when its in the engaged position.
The adjustment gear-set 34 includes an adjustment drive gear 27 and a barrel cam gear 29 that meshingly engage each other when the adjustment ring 22 is in the engaged position (see
The barrel cam 28 extends longitudinally from the barrel cam gear 29 and is non-concentric with the fixed ring 24 (see
The barrel 26 is constructed from a strong, flexible, thermal-conductive material, such as light gage steel. The material is initially in the shape of a flat sheet, and is then rolled into a generally cylindrical shape. In cross-section, the cylindrical barrel 26 has overlapping inner and outer ends 36 and 37 in a spiral configuration. The inner end 36 of the barrel 26 is attached to the barrel cam 28, and the barrel is coiled around the barrel cam non-concentrically. The barrel 26 is radially adjustable between an expanded position (see
The heater 30 can be provided by a flexible heating element made of kapton, mylar, silicone, or another material, that is bonded or otherwise attached to the inner surface of the barrel 26 to provide heat to the barrel. The heater 30 is sized and constructed so that it coils around the barrel cam 28 when the barrel 26 is adjusted smaller. This enables the heater 30 to remain in constant and continuous contact with the barrel 26 to provide even and uniform heating. To insure proper heating of the barrel 26, a thermistor can be attached to the bottom of the heater 30 and barrel to provide feedback to the temperature control circuit. All wires for the heater 30 and thermistor can be routed through an aperture in an inner surface of the fixed ring 24 near the barrel cam 28. By positioning the wires through this aperture in this location, bending and flexing of the wires is minimized during the adjustment of the barrel 26, and the wires are concealed and protected from the moving parts throughout the entire range of motion. In alternative embodiments, the heater can be provided by electric heating rods, coils, or other conventional heating elements that are attached to or positioned proximate the barrel to provide heat to the barrel.
The adjustable distal end assembly 40 is located at and forms the distal end of the curling iron 10. The adjustable distal end assembly 40 includes a plurality of fan blades 42 and a distal tip cover 16. The fan blades 42 are coupled to and extend between the tip cover 16 and the distal end of the barrel 26 such that they overlap and layer upon one another in a decreased-diameter arrangement when the barrel 26 is in the contracted position and they fan out into an increased-diameter arrangement when the barrel is in the expanded position (see
For example, in the depicted embodiment, the fan blades 42 are elongated and generally triangular, and are made from a flexible and heat resistant material. The wide ends of the fan blades 42 are attached to the distal end portion of the barrel 26 and the narrow ends are attached to the tip cover 16. And the tip cover 16 is attached to the distal end of the barrel cam 28, which in the depicted embodiment has a length that extends longer than that of the barrel 26.
Having described the major components and construction of the curling iron 10, its operation and use will now be described. In
To adjust the diameter of the barrel 26 smaller to make small-diameter curls, the user grasps the adjustment ring 22 and translationally moves it to the engaged position of
As can be seen by the position of the inner end 36 of the barrel 26 in
This same adjustment process can be used to adjust the diameter of the barrel 26 larger back to the expanded position or smaller to the contracted position (see
The barrel-adjustment assembly 20 and the barrel 26 can be constructed to provide a plurality of preset barrel diameters that are commonly used and seen in the market. For example, the protrusions 23 and the recesses 25 can be positioned and spaced to align and mate at positions of the adjustment ring 22 that produce a minimum and maximum diameter of the barrel 26 of 0.75 and 1.75 inches, respectively, with 0.25 inch increments. In this example, the curling iron 10 can be adjusted to five positions having barrel diameters of 0.75, 1.00, 1.25, 1.50, and 1.75 inches, thereby enabling a single one of the curling irons 10 to do the job of five conventional curling irons. In addition, the protrusions 23 and recesses 22 of the anti-rotation assembly form detents, and their circumferential spacings can be selected to define discrete adjustment positions of the barrel 26. One skilled in the art will recognize that a number of possible combinations and permutations for the sizing and arrangement of the barrel 26 and the barrel-adjustment assembly 20 can be provided to produce a number of different barrel sizes and discrete adjustment positions.
With reference now to
The adjustment gear-set 135 includes a cam gear 129 that rotates the barrel cam 128, and a drive gear 127 that drives the cam gear, similar to those described with respect to the first example embodiment. In this embodiment, however, the adjustment gear-set 135 includes a ring gear 154 and a ring-driven gear 152. The ring gear 154 is mounted to the adjustment ring 122, for example, with its teeth facing radially inward, and drives the ring-driven gear 152. The ring-driven gear 152 is coupled to the drive gear 127, for example by a connecting body 156, so that they rotate together. In this way, as the adjustment ring 122 is rotated, the ring gear 154 rotationally drives the ring-driven gear 152, which in turn rotates the drive gear 127, which in turn rotationally drives the cam gear 129, which rotates the barrel cam 128, thereby adjusting the diameter of the barrel.
In addition, the ball detent assembly 131 can be provided by a cylinder with an detent ball recessed therein and outwardly spring-biased. The ball detent assembly 131 is positioned and configured so that the detent ball engages with the teeth of the ring gear 154. The ball detent assembly 131 thereby provides a resistive force against the teeth of the ring gear 154 that prevents the ring gear from accidently rotating. However, the outward force of the ball detent assembly 131 can be overcome by applying a strong enough rotational force to the adjustment ring 122, allowing the barrel 126 to still be adjusted by the user as desired. Thus, the ball detent assembly 131 serves as an anti-rotation assembly to prevent unintended rotating of the adjustment ring 122 and mis-adjustment of the barrel 126. The ball detent assembly 131 can be mounted to the fixed ring or another stationary component of the curling iron.
As used herein, a ball detent assembly is any type of detent mechanism with a spring-biased extension and retraction member (not just a ball) that is biased into engagement with the ring gear teeth to hold the adjustment ring from rotation unless a sufficiently large rotary overcoming force is applied to the adjustment ring.
With reference now to
In this way, when the rotary adjustment ring 222 is rotated, the ring gear 227 attached to it rotationally drives the planet gears 229. And the rotating planet gears 229 then rotationally drive the finger cam arms 228, which causes the heated fingers 230 to swing between the expanded position of
In addition, the guide plate 221 can include a plurality of curved cam-arm guide tracks 225 formed in it and the finger cam arms 228 can include guide extensions (not shown) extending proximally from them and riding along the cam-arm guide tracks. In this way, the cam-arm guide tracks 225 and the cam-arm guide extensions cooperatively provide additional guidance for a smooth and easy radial-adjustment motion. In the depicted embodiment, the am-arm guide tracks 225 are provided by curved slots extending through the guide plate 221 and through which electrical wires can be routed for powering the heated fingers 230.
While the invention has been shown and described in example forms, it will be apparent to those skilled in the art that many modifications, additions, and deletions can be made therein without departing from the spirit and scope of the invention as defined by the following claims.
Claims
1. An adjustable-barrel curling iron, comprising:
- a handle;
- a pivotal clip;
- a radially-adjustable barrel having an outer end and an inner end that overlap each other in a spiral configuration;
- at least one heater that provides heat to the barrel; and
- a barrel-adjustment assembly including a rotary adjustment ring, a rotation-transferring linkage, and a barrel cam, wherein the rotary adjustment ring rotates relative to the handle and is operably coupled to the rotation-transferring linkage, and the inner end of the barrel is coupled to the barrel cam, wherein when the rotary adjustment ring is rotated its rotary motion is transferred to the barrel cam by the rotation-transferring linkage, and the rotation of the barrel cam wraps and unwraps the barrel about the barrel cam to change the diameter of the barrel and radially adjust the barrel between an expanded position and a contracted position.
2. The adjustable-barrel curling iron of claim 1, wherein the heater is a flexible heating element attached to an inner surface of the barrel to provide heat to the barrel.
3. The adjustable-barrel curling iron of claim 1, wherein the rotary adjustment ring longitudinally translates relative to the handle between an engaged position and a disengaged position, wherein in the engaged position the rotation-transferring linkage is engaged to rotate the barrel cam and in the disengaged position it is not.
4. The adjustable-barrel curling iron of claim 3, wherein the rotary adjustment ring is spring-biased to toward the disengaged position.
5. The adjustable-barrel curling iron of claim 3, wherein the rotary adjustment ring includes an anti-rotation assembly having at least one protrusion that engages another component of the curling iron when the rotary adjustment ring is in the disengaged position to prevent rotation of the rotary adjustment ring when the rotary adjustment ring is in the disengaged position.
6. The adjustable-barrel curling iron of claim 5, further comprising a fixed ring that does not rotate relative to the handle, wherein the anti-rotation assembly includes a plurality of protrusions extending from one of the rotary adjustment ring and the fixed ring and a plurality of mating recesses formed in the other of the rotary adjustment ring and the fixed ring.
7. The adjustable-barrel curling iron of claim 1, wherein the rotation-transferring linkage comprises an adjustment gear-set.
8. The adjustable-barrel curling iron of claim 7, wherein the adjustment gear-set includes a drive gear and a cam gear, the drive gear is operably coupled to and rotates with the rotary adjustment ring, the cam gear is rotationally driven by the drive gear, and the barrel cam is coupled to and rotates with the cam gear.
9. The adjustable-barrel curling iron of claim 1, further comprising an adjustable distal end assembly comprising a plurality of fan blades configured to cover a distal end of the barrel as the diameter of the barrel is changed.
10. The adjustable-barrel curling iron of claim 9, wherein the adjustable distal end assembly further comprises a distal tip cover, wherein the fan blades are coupled to and extend between the tip cover and the distal end of the barrel so that they overlap and layer upon one another in a decreased-diameter arrangement when the barrel is in the contracted position and they fan out into an increased-diameter arrangement when the barrel is in the expanded position.
11. An adjustable-barrel curling iron, comprising:
- a handle;
- a pivotal clip;
- a radially-adjustable barrel having an outer end and an inner end that overlap each other in a spiral configuration;
- at least one heater that provides heat to the barrel; and
- a barrel-adjustment assembly including a fixed ring, a rotary adjustment ring, an adjustment gear-set, and a barrel cam, wherein the rotary adjustment ring rotates relative to the handle and the fixed ring and is operably coupled to the adjustment gear-set, and the inner end of the barrel is coupled to the barrel cam,
- wherein when the rotary adjustment ring is rotated its rotary motion is transferred to the barrel cam by the adjustment gear-set, and the rotation of the barrel cam wraps and unwraps the barrel about the barrel cam to change the diameter of the barrel and radially adjust the barrel between an expanded position and a contracted position, and
- wherein the rotary adjustment ring longitudinally translates relative to the handle and the fixed ring between an engaged position and a disengaged position, in the engaged position the adjustment gear-set is engaged to rotate the barrel cam and in the disengaged position it is not, and the rotary adjustment ring is spring-biased to toward the disengaged position.
12. The adjustable-barrel curling iron of claim 11, wherein barrel cam extends longitudinally from the adjustment gear-set and is non-concentric with the fixed ring.
13. The adjustable-barrel curling iron of claim 11, wherein the heater is a flexible heating element attached to an inner surface of the barrel to provide heat to the barrel.
14. The adjustable-barrel curling iron of claim 13, wherein the flexible heating element is made of kapton, mylar, or silicone.
15. The adjustable-barrel curling iron of claim 11, wherein the adjustment gear-set includes a drive gear and a cam gear, the drive gear is operably coupled to and rotates with the rotary adjustment ring, the cam gear is rotationally driven by the drive gear, and the barrel cam is coupled to and rotates with the cam gear.
16. The adjustable-barrel curling iron of claim 11, wherein the rotary adjustment ring includes an anti-rotation assembly having at least one protrusion extending from one of the rotary adjustment ring and the fixed ring that matingly engages a component of the other of the rotary adjustment ring and the fixed ring to prevent rotation of the rotary adjustment ring when the rotary adjustment ring is in the disengaged position.
17. The adjustable-barrel curling iron of claim 11, wherein the rotary adjustment ring includes an anti-rotation assembly having a plurality of protrusions extending from one of the rotary adjustment ring and the fixed ring and a plurality of recessed formed in the other of the rotary adjustment ring and the fixed ring that matingly engage each other when the rotary adjustment ring is in the disengaged position to prevent rotation of the rotary adjustment ring when the rotary adjustment ring is in the disengaged position.
18. The adjustable-barrel curling iron of claim 11, further comprising an adjustable distal end assembly comprising a plurality of fan blades configured to cover a distal end of the barrel as the diameter of the barrel is changed.
19. The adjustable-barrel curling iron of claim 18, wherein the adjustable distal end assembly further comprises a distal tip cover, wherein the fan blades are coupled to and extend between the tip cover and the distal end of the barrel so that they overlap and layer upon one another in a decreased-diameter arrangement when the barrel is in the contracted position and they fan out into an increased-diameter arrangement when the barrel is in the expanded position.
20. The adjustable-barrel curling iron of claim 18, wherein the fan blades are elongated and generally triangular, with wide ends of the fan blades attached to the distal end of the barrel and narrow ends attached to the tip cover.
Type: Application
Filed: Sep 13, 2010
Publication Date: Mar 17, 2011
Inventors: Christopher Ryan YAHNKER (Raleigh, NC), Cyan GODFREY (Chapel Hill, NC), Nathan WANG (Raleigh, NC), David Milton (Garner, NC)
Application Number: 12/880,427
International Classification: A45D 1/04 (20060101);