Hair fastening device

Abstract: A toothed hair fastening device (10) having leaf-spring elements (4) situated between one or more of the teeth (3) of the fastener, and suitable for both thick and thin hair. Preferably, the leaf-springs (4) are integrally formed as part of the toothed hair fastener (10).

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to hair fastening devices, and more particularly to toothed hair fasteners having leaf-spring elements situated between the teeth of the device, and suitable for both thick and thin hair. 2. Related Art Hair combs and related hair fastening devices, such as chignon pins, have traditionally been made with narrow-spaced teeth or prongs for use with thin hair, and with wide-spaced teeth for use with thick hair. Devices having narrow-spaced teeth are difficult to insert into thick hair, and devices having wide-spaced teeth tend to be easily dislodged when used in thin hair. Therefore, it has been common for merchants to maintain an inventory of both types of devices to accommodate hair of different thicknesses. Therefore, it would be desirable to provide a single type of hair fastening device that can be used with either thin or thick hair and which can be easily and inexpensively manufactured. FR-A-2642622 discloses a hair fastening device comprising a plurality of teeth, with a leaf spring positioned between each pair of adjacent teeth. The teeth and leaf springs are made as separate units and the leaf springs are unattached to the teeth. According to the present invention there is provided a hair fastening device including a support structure; a plurality of spaced-apart teeth fastened to the support structure for separating strands of hair; and at least one leaf spring positioned between a pair of adjacent teeth for clasping hair passing between the teeth, characterised in that the leaf spring is attached to one of the pair of teeth. BRIEF DESCRIPTION OF THE DRAWINGS FIGURE 1 is a front view of a curved-back hair comb. FIGURE 2 is a front view of a hair fastening pin. FIGURE 3 is a front view of a first curve-backed hair comb. FIGURE 4 is a front view of a second curve-backed hair comb. FIGURE 5 is a front view of a circular hair fastening device. FIGURE 6 is a front view of a chignon pin. Like reference numbers and designations in the drawings refer to like elements. DETAILED DESCRIPTION OF THE INVENTION Throughout this description, the preferred embodiment and examples shown should be considered as exemplars, rather than limitations on the structure of the present invention. FIGURE 1 shows a front view of a curved-back hair comb 10. The comb 10 includes a curved spine 2 having a number of projecting teeth 3. As known in the art, the comb teeth 3 can be integrally formed with the back 2 of the comb 10, or separately manufactured and affixed thereto. The teeth 3 are generally, but not necessarily, parallel. Further, the teeth 3 may be straight, or curved (e.g., wavy) in any dimension. Affixed at intervals to one or more of the teeth 3 are leaf-springs 4 formed of a resilient material, such as a flexible plastic. Each leaf-spring 4 is attached to its associated tooth 3 so as to leave open space between the leaf-spring 4 and the tooth 3. As shown in FIGURE 1, leaf-springs 4 from adjacent teeth 3 are preferably designed to approximately conform to each other's shape. Such conformance leaves little or no gap between adjacent leaf-springs 4. In the preferred embodiment of the invention, the leaf-springs 4 are integrally injection molded as part of the teeth 3 using a suitable flexible elastic material such as for example polypropylene, polyethylene, nylon or acetate celloluse. However, if desired, the leaf-springs 4 can be separately manufactured, and affixed to the teeth 3 in any desired fashion (for example, by heat welding, gluing, or ultrasonic bonding). The purpose of the larger teeth 3 is to "split" relatively large groups of hair strands apart. Because the teeth 3 are relatively widely spaced (comparable to the widely spaced teeth used for combs designed for thick hair), hair fastening devices in accordance with this design can be inserted into thick hair relatively easily. As the teeth 3 of a comb 10 penetrate into a user's hair, each group of strands of the user's hair slides in between the leaf-springs 4, which are flexibly displaced during such insertion. The restorative spring force of adjacent leaf-springs 4 exerts a clamping force against the hair, and thus the leaf-springs 4 firmly clasp even thin hair. Therefore, the stronger, more widely spaced teeth 3 of the comb 10 are used to initially penetrate hair, while the leaf-springs 4 are used to clamp the comb 10 to the hair and maintain the comb 10 in position after insertion. FIGURE 2 is an alternative comb or pin-like device 20 showing an alternative configuration of the teeth 3 and leaf-springs 4. The principle of operation of this device 20 is the same as the curved-back comb 10 in FIGURE 1. FIGURE 3 shows a curve-backed comb 30, having a straight back 5 rather than the curved back 20 of the comb shown in FIGURE 1. However, the principle of operation of the straight-backed comb 30 is the same as the curved-back comb 10 in FIGURE 1. FIGURE 4 shows an alternative embodiment of a curve-backed comb 40 having a slightly different configuration for the leaf-springs 4. FIGURE 5 shows a circular hair pin 50. The pin 50 comprises two pivoting semi-circular halves 6,7 each having a set of teeth 3 and one of them having associated leaf springs 4. A clasp or locking mechanism 8 is provided such that the two semi-circular halves 6,7 can be locked together after insertion of the device into a user's hair. The circular hair pin 50 operates in the same fashion as the embodiments discussed above, except that both of the semi-circular halves 6,7 are inserted into the hair (for example, when used with a "pony tail"). FIGURE 6 shows a chignon pin 60 having teeth 3 and leaf-springs 4. The teeth 3 of the chignon pin 60 may also be referred to as tines or prongs. Between at least some of the teeth 3 are leaf-springs 4 that function in the same manner as the leaf-springs 4 shown in the devices of FIGURES 1-5. The illustrated embodiments show the leaf-springs 4 as being connected to a tooth 3 at both ends of each spring 4. However, the leaf-springs 4 can be made such that they are not connected at one end to a tooth 3. In some uses, this may have the drawback of catching hair either upon insertion or withdrawal of a hair fastening device. In other uses, such a characteristic may be desirable. Although the illustrated embodiments show leaf-springs 4 between each pair of teeth 3, it is not necessary that every pair of teeth 3 have leaf-springs 4 situated therebetween. Further, the leaf-springs 4 may be formed attached to only one of a pair of teeth 3, as shown in FIGURE 5. In this configuration, the restorative spring force of the single leaf-spring 4 exerts a clamping force against the hair, pressing the hair against the adjacent opposing tooth 3. Various modifications may be made. For example, the spacing between adjacent paired leaf-springs 4, or between a single leaf spring 4 and an adjacent opposing tooth 3, can be varied as desired during manufacture to alter the clamping force exerted by the leaf-springs 4. The thickness of the leaf-springs 4 can also be varied during manufacture to alter the clamping force.

Claims: A hair fastening device (10,20,30,40,50,60) including a support structure (2,5,6,7); a plurality of spaced-apart teeth (3), fastened to the support structure (2,5,6,7) for separating strands of hair; and at least one leaf spring (4) positioned between a pair of adjacent teeth for clasping hair passing between the teeth, characterised in that the leaf spring (4) is attached to one of the pair of teeth. The hair fastening device of claim 1, wherein at least one leaf spring (4) is positioned between each pair of adjacent teeth (3), each leaf spring (4) being attached to a tooth of the corresponding pair. The hair fastening device of any preceding claim, wherein the support structure (5) is straight. The hair fastening device of any one of claims 1 and 2, wherein the support structure (2,6,7) is curved. The hair fastening device of any preceding claim, wherein the hair fastening device (10,20,30,40) is a comb. The hair fastening device of any one of claims 1 to 4, wherein the hair fastening device is a chignon pin (60). The hair fastening device of any preceding claim, wherein each leaf spring (4) is integrally formed as part of a tooth (3).

Inventors: WU FU-CHI, WU, FU-CHI
Applicants: WU FU CHI, WU, FU-CHI
Application year: 1990
Main classification: A45D8
IPC codes: A45D8