Zipper tooth strip and zipper

Abstract

The zipper tooth strip comprises a plurality of zipper teeth arranged at intervals, each zipper tooth is provided with a meshing head portion and a pair of leg portions symmetrically extending backwards from the meshing head portion, and a cloth seam cavity allowing cloth or cloth belts to penetrate through is formed between the pair of leg portions. A sewing thread positioning groove is concavely formed in at least one side of the leg part in the width direction of the leg part, the sewing thread positioning groove penetrates through two opposite surfaces of the leg part in the thickness direction of the leg part, and a plurality of zipper teeth which are arranged at intervals are sequentially connected in series through a connecting rope in the width direction of the leg part to form a zipper tooth strip. The sewing thread positioning grooves are formed in the side faces, in the width direction, of the chain tooth legs, so that when chain tooth strips are sewn to cloth or cloth belts, sewing needles can be positioned and guided through the sewing thread positioning grooves, the production efficiency is improved, meanwhile, after sewing is completed, sewing threads are embedded in the sewing thread positioning grooves, the chain teeth are better fixed, and the service life of the chain teeth is prolonged. The situation that the zipper teeth slide relative to the cloth or the cloth belt after the zipper is used for a long time is avoided, and the stability of the zipper structure is improved.

Description

Technical Field

[0001] This utility model relates to the field of zipper technology, specifically to a zipper tooth and a zipper. Background Technology

[0002] A zipper is a connector consisting of two interlocking flexible toothed strips and a slider that allows it to be repeatedly opened and closed. Zippers are generally classified into metal zippers, injection-molded zippers, and nylon zippers. Injection-molded and nylon zippers are both made by first creating a strip of teeth arranged at intervals using a molding process, and then sewing this strip of teeth onto fabric or a fabric strip to form the zipper. However, existing injection-molded and nylon zippers lack a specific structure to position the sewing thread, causing the teeth to easily slip relative to the fabric or fabric strip during use, affecting the normal operation of the zipper. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a chain tooth and zipper that can prevent the chain teeth from sliding relative to the fabric or fabric strip, thereby improving the stability of the zipper structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A zipper tooth strip includes a plurality of spaced-apart teeth. Each tooth has an engaging head and a pair of legs symmetrically extending rearward from the engaging head. A fabric cavity is formed between the legs for fabric or tape to pass through. At least one side of each leg has a thread positioning groove recessed along its width direction. The thread positioning groove extends through two opposite surfaces of the leg along its thickness direction. The plurality of spaced-apart teeth are sequentially connected by a connecting cord along the width direction of the legs to form the zipper tooth strip. By providing a thread positioning groove on the side of the zipper tooth legs in the width direction, the needle can be positioned and guided when the zipper tooth strip is sewn onto the fabric or tape, improving production efficiency. Furthermore, after sewing, the thread is embedded in the thread positioning groove, better securing the teeth and preventing slippage of the teeth relative to the fabric or tape after long-term use, thus improving the stability of the zipper structure.

[0006] As a preferred technical solution, the engaging head has a first protrusion extending along the width direction of the leg.

[0007] As a preferred technical solution, the end of the leg is formed with a tail, and the connecting rope passes through the tail to connect a number of spaced-apart chain teeth.

[0008] As a preferred technical solution, the leg is provided with stitch positioning grooves on both sides along its width direction.

[0009] As a preferred technical solution, the leg is provided with a second protrusion along its width direction, and the tail is provided with a third protrusion along its width direction, and the seam positioning groove is formed between the second protrusion and the third protrusion.

[0010] As a preferred technical solution, the tail portion is provided with a fourth protrusion along its thickness direction on the side away from the fabric seam cavity.

[0011] As a preferred technical solution, the opposing surfaces of the two legs on the same chain tooth are smooth surfaces.

[0012] As a preferred technical solution, the side surface of the leg away from the fabric cavity and located between the engaging head and tail is a smooth surface, which is naturally formed by bending a flat surface.

[0013] A zipper includes the aforementioned chain teeth, wherein a piece of cloth or cloth strip is threaded through the fabric cavity of the chain teeth, and the chain teeth are sewn to the cloth or cloth strip by a sewing thread to form a toothed chain band. The sewing thread located on both sides of the leg of the chain teeth extends along the sewing thread positioning groove, and a pull head is provided between two of the toothed chain bands to pull the chain teeth of the two together or apart.

[0014] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, by setting a seam positioning groove on the side of the chain tooth leg in the width direction, the sewing needle can be positioned and guided by the seam positioning groove when the chain tooth strip is sewn onto the fabric or tape, thereby improving production efficiency. At the same time, after sewing is completed, the seam is embedded in the seam positioning groove, thereby better fixing the chain tooth and preventing the chain tooth from sliding relative to the fabric or tape after long-term use, thus improving the stability of the zipper structure.

[0015] To more clearly illustrate the structural features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments: Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the chain tooth after molding according to an embodiment of the present utility model;

[0017] Figure 2 This is a side view of the chain teeth after molding according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the outer surface structure of the chain tooth before molding, according to an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the inner surface structure of the chain tooth before molding, according to an embodiment of this utility model;

[0020] Figure 5This is a schematic diagram of the tooth chain belt according to an embodiment of the present invention;

[0021] Figure 6 yes Figure 5 Enlarged view of point A in the middle;

[0022] Figure 7 This is a schematic diagram of the cross-sectional structure of the toothed chain belt according to an embodiment of the present invention;

[0023] Figure 8 This is a schematic diagram of the zipper structure according to an embodiment of the present invention.

[0024] Explanation of reference numerals in the attached diagram:

[0025] 10. Chain teeth 11. Engaging head 12. Legs

[0026] 13. Fabric seam cavity; 14. Sewing thread positioning groove; 15. Tail end

[0027] 16. The first convex part 17, the second convex part 18, the third convex part

[0028] 19. Fourth protrusion; 20. Connecting rope; 30. Cloth or cloth strip.

[0029] 40. Sewing thread 100. Chain teeth 200. Chain strap

[0030] 300. Zipper. Detailed Implementation

[0031] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the position or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] First, please refer to... Figure 1-2As shown, a chain tooth includes a plurality of spaced-apart chain teeth 10. Each chain tooth 10 has an engaging head 11 and a pair of legs 12 symmetrically extending rearward from the engaging head 11. A fabric cavity 13 is formed between the pairs of legs 12 for fabric or fabric tape to pass through. The legs 12 are recessed on both sides along their width direction with seam positioning grooves 14. The seam positioning grooves 14 penetrate the two opposite surfaces of the legs 12 along their thickness direction. The plurality of spaced-apart chain teeth 10 are connected in series by a connecting rope 20 along the width direction of the legs 12 to form a chain tooth strip 100. By providing a thread positioning groove 14 on the side of the leg 12 of the chain tooth 10 in the width direction, the thread positioning groove 14 can position and guide the sewing needle when the chain tooth strip 100 is sewn onto the fabric or tape, thereby improving production efficiency. At the same time, after sewing is completed, the thread is embedded in the thread positioning groove 14, thereby better fixing the chain tooth 10 and preventing the chain tooth 10 from sliding relative to the fabric or tape after long-term use of the zipper, thus improving the stability of the zipper structure.

[0034] In this invention, the end of the leg 12 is formed with a tail 15, and the connecting rope 20 passes through the tail 15 to connect a plurality of spaced-apart chain teeth 10. The engaging head 11 has a first protrusion 16 extending along the width direction of the leg 12, the leg 12 has a second protrusion 17 extending along its width direction, and the tail 15 has a third protrusion 18 extending along its width direction. The seam positioning groove 14 is formed between the second protrusion 17 and the third protrusion 18. The tail 15 has a fourth protrusion 19 extending along its thickness direction away from the fabric seam cavity 13. It should be understood that in actual use, the seam positioning groove 14 can also be provided only on one side of the leg 12, and the seam positioning groove 14 can also be directly recessed on the side of the leg 12.

[0035] like Figure 3-4 As shown, the chain teeth of this invention are laid flat before molding. During molding, they are folded along the center line to fix the shape, thus obtaining... Figure 1 The chain tooth 100 is shown. In this invention, the opposing surfaces of the two legs 12 on the same chain tooth 10 are smooth surfaces. The side surface of the leg 12 away from the sewn cavity 13 and located between the engaging head 11 and the tail 15 is a smooth surface, which is naturally formed by bending a flat surface.

[0036] like Figure 5-8 As shown, this utility model also provides a zipper 300, including the aforementioned chain teeth 100. A cloth or cloth strip 30 is threaded through the fabric sewing cavity 13 of the chain teeth 100. The chain teeth 100 and the cloth or cloth strip 30 are sewn together by a sewing thread 40 to form a toothed chain band 200. The sewing thread 40 located on both sides of the leg 12 of the chain teeth 10 extends along the sewing thread positioning groove 14. A pull head 50 is provided between the two toothed chain bands 200 to pull the chain teeth 10 of the two together or apart.

[0037] In summary, this utility model provides a seam positioning groove on the side of the chain tooth leg in the width direction. This allows the sewing needle to be positioned and guided when the chain tooth is sewn onto the fabric or tape, improving production efficiency. Furthermore, after sewing, the thread is embedded in the seam positioning groove, better securing the chain tooth and preventing it from sliding relative to the fabric or tape after long-term use, thus improving the stability of the zipper structure.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Therefore, any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the actual technical aspects of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A fastener stringer comprising a plurality of spaced fastener elements, said fastener elements having an engaging head portion and a pair of legs extending symmetrically rearwardly from the engaging head portion, the pair of legs defining a web space therebetween for the passage of a web or webbing, characterised in that, The leg part is recessed with a suture positioning groove along at least one side of its width direction, the suture positioning groove penetrates through the opposite two surfaces of the leg part along its thickness direction, and a plurality of interval-arranged clasps are connected by a connecting rope along the width direction of the leg part to form a clasp strip.

2. A fastener string according to claim 1, wherein The engaging head part has a first protrusion protruding along the width direction of the leg part.

3. The fastener strip according to claim 1, wherein The end of the leg part is formed with a tail part, and the connecting rope penetrates through the tail part to connect the plurality of interval-arranged clasps.

4. The fastener strip according to claim 1, wherein The leg part is provided with a suture positioning groove along both sides of its width direction.

5. The fastener strip according to claim 3, wherein The leg part is provided with a second protrusion protruding along its width direction, the tail part is provided with a third protrusion protruding along its width direction, and the suture positioning groove is formed between the second protrusion and the third protrusion.

6. A fastener strip according to claim 5 wherein, The tail part is provided with a fourth protrusion protruding along its thickness direction away from the cloth sewing cavity.

7. The fastener strip according to claim 1, wherein The opposite surfaces of the two leg parts on the same clasp are smooth surfaces.

8. The fastener strip of claim 3 wherein, The part of the leg part away from the cloth sewing cavity and between the engaging head part and the tail part is a smooth surface, which is naturally formed by bending a plane.

9. A zipper characterized by, The clasp strip of any one of claims 1-8 is provided with cloth or cloth tape in the cloth sewing cavity, the clasp strip and the cloth or cloth tape are sewn together by a suture to form a clasp belt, the suture on both sides of the leg part of the clasp extends along the suture positioning groove, and a puller is arranged between the two clasp belts to pull the clasps of the two clasp belts together or apart.

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