GB2453399A

GB2453399A - Zipper having two protrusions retaining position of a locking tooth

Info

Publication number: GB2453399A
Application number: GB0805164A
Authority: GB
Inventors: Yu-Pau Lin
Original assignee: Chung Chwan Enterprise Co Ltd
Current assignee: Chung Chwan Enterprise Co Ltd
Priority date: 2007-10-03
Filing date: 2008-03-20
Publication date: 2009-04-08
Anticipated expiration: 2028-03-20
Also published as: FR2921801A3; GB2453399B; TWM335960U; FR2921801B3; GB0805164D0; JP3143517U; TR200802265U

Abstract

A zipper head includes a zipper body 1, a horse hook 2 which can project into guide grooves 11 to engage zip fastening elements and maintain the position of the zipper head, an elastic piece 3, a cap 4 and a pulling piece 5. An end portion 51 of the pulling piece is located between the zip body and the locking prong 2. The elastic piece abuts the locking hook and biases the hook into engagement with zip fastening elements; one end of the elastic piece is fixed on the slider body 1 preferably by deformable fixing protrusions 16. Two locking hook retaining protrusions 42 are provided in the interior of the cover 4, one protrusion 42 on each side of the cover 4. The two protrusions 42 of the cap 4 are located above the fulcrum portion of the horse hook 2. The protrusions 42 block and restrict the position of the fulcrum portion of a horse hook and prevent excessive displacement or deformation of locking prong 2.

Description

ZIPPER HEAD

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention is related to an improved zipper head, and more particular to an improved zipper head that can restrict the position of a horse hook, have a better structural strength and can be assembled more easily.

2. Description of Related Art

Conventional zipper puller includes a puller, a horse hook, an elastic piece, a cap and a pulling piece. The horse hook is pressed to fit in guiding grooves of the puller via the elastic piece. One end of the pulling piece is positioned under the horse hook. The cap is fixed on the puller and covers above the horse hook and the elastic piece. For example, Taiwan Patent Publication No.M292296 discloses an assembled structure (II) of a zipper head.

However, in the conventional zipper head, the horse hook is pressed to fit in the guiding grooves of the puller via the elastic piece. Since the horse hook can be fixed only by means of the elastic force of the elastic piece, the fulcrum portion of the horse hook may be displaced excessively due to an extreme pulling force of the pulling piece. As a result, the horse hook may get deformed or deviate from a predetermined position.

Consequently, because of the above technical defects, the inventor keeps on carving unflaggingly through wholehearted experience and research to develop the present invention, which can effectively improve the defects described above.

SUMMARY OF THE INVENTION

The object of the present invention is to provide an improved zipper head that can provide a function of blocking and restricting the position of the fulcrum portion of a horse hook, so that the fulcrum portion of the horse hook cannot be displaced excessively due to an extreme pulling force of the pulling piece. Therefore, the horse hook can be prevented from getting deformed or deviating from a predetermined position.

For achieving the object described above, the present invention provides an improved zipper head, which includes: a puller formed with guiding grooves therein, the top of the puller having an accommodating portion and a penetrating hole, the penetrating hole communicating with the guiding grooves; a horse hook having a hook portion and a fulcrum portion, the top surface of the horse hook being formed into an abutting surface, the horse hook being accommodated in the accommodating portion of the puller; a pulling piece having an end portion at one end thereof, the end portion being disposed under the horse hook; an elastic piece, one end thereof being fixed on the puller, the elastic piece abutting against the abutting surface of the horse hook to make the hook portion of the horse hook to penetrate through the penetrating hole of the puller and extend into the guiding grooves; a cap provided with a protrusion on both sides in the interior thereof, the cap covering on the horse hook and the elastic piece, the cap being fixed on the puller, the two protrusions of the cap being located above the fulcrum portion of the horse hook.

The present invention has advantageous effects as follows. The horse hook of the present invention can be fixed via the elastic force of the elastic piece. In addition, two protrusions are provided above the fulcrum portion of the horse hook, thereby providing a function of blocking and restricting the position of the fulcrum portion of the horse hook. Therefore, even when the pulling force of the pulling piece is too large, the fulcrum portion of the horse hook cannot be displaced excessively and thus the horse hook can be prevented from getting deformed or deviating from a predetermined position. Further, the two protrusions are integrally formed on both sides in the interior of the cap. Via this arrangement, the structural strength is good and the assembling process is simple, so that the cost can be reduced efficiently.

In order to further understand the characteristics and technical contents of the present invention, a detailed description is made with reference to the accompanying drawings. However, it should be understood that the drawings are illustrative only but not used to limit the present invention thereto.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is an exploded perspective view showing the zipper head of the present invention; Fig. 2 is a perspective view showing the zipper head of the present invention; Fig. 3 is a perspective view showing the zipper head of the present invention without a cap; Fig. 4 is a cross-sectional view showing the zipper head of the present invention; and Fig. 5 is a perspective view showing the cap of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer to Figs. 1 to 4. The present invention is to provide an improved zipper head including a puller 1, a horse hook 2, an elastic piece 3, a cap 4 and a pulling piece 5. The interior of the puller 1 is formed with guiding grooves 11 for allowing a zipper (not shown) to be fitted therein. The top of the puller 1 has an accommodating portion 12 for allowing the horse hook 2 to be fitted therein. Both sides of the accommodating portion 12 are provided with a blocking portion 13. Both ends of the accommodating portion 12 are provided with a penetrating hole 14 and a platen 15 respectively. The penetrating hole 14 communicating with the guiding grooves 11. One end of the top of the puller I is provided with a fixing base 16.

One end of the horse hook 2 is formed with a hook portion 21, and the other end of the horse hook 2 is formed with a fulcrum portion 22. The top surface of the horse hook 2 is formed with an abutting surface 23 against which the elastic piece 3 abuts. The horse hook 2 is accommodated in the accommodating portion 12 of the puller 1. The blocking portions 13 block both sides of the horse hook 2, thereby preventing the leftward or rightward displacement of the horse hook 2. The hook portion 21 of the horse hook 2 is fitted in the penetrating hole 14. The fulcrum portion 22 of the horse hook 2 is supported on the platen 15. One end of the pulling piece 5 has an end portion 51 that is positioned under the middle section of the horse hook 2.

The elastic piece 3 is made of metallic materials having a better elasticity.

The elastic piece 3 has a shape of a sheet body. One end of the elastic piece 3 is fixed on the fixing base 16 of the puller 1. The other end of the elastic piece 3 is formed into a free end and abuts against the abutting surface 23 of the horse hook 2, so that the hook portion 21 of the horse hook 2 can penetrate through the penetrating hole 14 of the puller I and extend into the guiding grooves 11, thereby engaging on chain teeth of the zipper. Also, the pulling piece 5 can be pulled to separate the hook portion 21 of the horse hook 2 from the chain teeth of the zipper.

The cap 4 is a hollow cap having an opening on the bottom thereof. Both sides of the cap 4 are formed with a notch 41 respectively (Figs. 4 and 5). The end portion 51 of the pulling piece 5 penetrates through the two notches 41. A protrusion 42 is provided on both sides within the cap 4. The lower end of each protrusion 42 has a restricting surface 421. The cap 4 covers the top of the puller 1. Further, the cap 4 covers above the horse hook 2 and the elastic piece 3. Both sides of the cap 4 are fixed on the puller 1 via four rivets, thereby combining the puller I, the horse hook 2 and the elastic piece 3 to form a zipper head. The restricting surfaces 421 of the two protrusions 42 of the cap 4 are located above the fi.ilcrum portion 22 of the horse hook 2, so that the restricting surfaces 421 of the two protrusions 42 can provide a function of restricting the position of the fulcrum portion 22 of the horse hook 2. Via the above construction, the improved zipper head of the present invention can be formed.

In the present invention, the horse hook 2 can be fixed by means of the elastic force of the elastic piece 3. In addition, two protrusions 42 are provided above the fulcrum portion 22 of the horse hook 2, thereby providing a function of blocking and restricting the position of the fulcrum portion 22 of the horse hook 2. Therefore, even when the pulling force of the pulling piece is too large, the fulcrum portion 22 of the horse hook 2 cannot be displaced excessively and thus the horse hook 2 can be prevented from getting deformed or deviating from a predetermined position.

Further, the two protrusions 42 are integrally formed on both sides in the interior of the cap 4. Via this arrangement, the structural strength is good and the assembling process is simple, so that the cost can be reduced efficiently.

While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention needs not be limited to the disclosed embodiment. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.

Claims

WHAT IS CLAIMED IS: 1. A zipper head, comprising: a puller formed with guiding grooves therein, a top of the puller having an accommodating portion and a penetrating hole, the penetrating hole communicating with the guiding grooves; a horse hook having a hook portion and a fulcrum portion, a top surface of the horse hook being formed into an abutting surface, the horse hook being accommodated in the accommodating portion of the puller; a pulling piece having an end portion at one end thereof, the end portion being disposed under the horse hook; an elastic piece, one end thereof being fixed on the puller, the elastic piece abutting against the abutting surface of the horse hook to make the hook portion of the horse hook to penetrate through the penetrating hole of the puller and extend into the guiding grooves; and a cap having a protrusion on both sides in an interior thereof, the cap covering on the horse hook and the elastic piece, the cap being fixed on the puller, the two protrusions of the cap being located above the fulcrum portion of the horse hook.
2. The zipper head according to claim 1, wherein one end of the accommodating portion is provided with a platen, and the fulcrum portion of the horse hook is supported on the platen.
3. The zipper head according to claim 1 or 2, wherein the lower end of each of the two protrusions has a restricting surface, and the restricting surfaces of the two protrusions are located above the fulcrum portion of the horse hook.
4. The zipper head according to claim 1, wherein both sides of the accommodating portion are provided with blocking portions, and the blocking portions block on both sides of the horse hook.
5. The zipper head according to claim 1, wherein the top of the puller is provided with a fixing base, and one end of the elastic piece is fixed on the fixing base of the puller.
6. The zipper head according to claim 1, wherein the hook portion is formed on one end of the horse hook, and the fulcrum portion is formed on the other end of the horse hook.
7. The zipper head according to claim 1, wherein both sides of the cap are formed with a notch, and the end portion of the pulling piece penetrates through the two notches.
8. A zipper head substantially as hereinbe fore described with reference to and as shown in Figures 1 to 5 of the accompanying drawings.