DURABLE NYLON ZIP FASTENER

Abstract

A durable nylon zip fastener is formed from a pull and two chains. A chain is formed from chain teeth joined to a cloth tape by means of sewing thread. The pull comprises an upper wing plate and a lower wing plate, the upper wing plate and the lower wing plate being connected together by means of a support core therebetween, forming an accommodation cavity permitting the chains to pass through. The accommodation cavity is provided with two guide inlet openings near a support core end, used to guide in each of the two chains. Another end of the accommodation chamber is provided with a meshing exit opening, used to guide out the two meshed chains. The upper wing plate comprises an upper plate body holding the chain teeth from above and an upper flange part holding the chain teeth from two sides.

Description

TECHNICAL FIELD

The present disclosure relates to the technical field of nylon zippers, and particularly provides a durable nylon zipper.

BACKGROUND

Zippers are classified into three categories according to their materials: metal zippers, resin zippers, and nylon zippers. The zipper teeth of the nylon zipper are formed by winding a nylon monofilament around a central line through a heating and pressing die. Compared with metal zippers and resin zippers, the nylon zipper has the characteristics of low cost, large yield, and high popularization rate.

Refuting to FIG. 1, the zipper teeth 22 of the nylon zipper in the prior art are formed by winding a nylon monofilament around a central line 23 through a heating and pressing die, the zipper teeth on two sides and cloth tapes 24 on two sides are combined through sewing lines 21 to form two zipper belts 02 of the zipper, and then the two zipper belts are combined through a puller 01 to form the zipper capable of being opened and closed. Since the zipper teeth 22 are made of hard materials, the sewing line 21 necessarily protrudes from the upper surfaces of the zipper teeth.

The puller 01 combines the two zipper belts by pressing the zipper teeth through an inner wall of the accommodating cavity. The puller includes an upper wing plate a wing plate that contacts and presses the zipper teeth) and a lower wing plate (a wing plate that contacts and presses the cloth tapes). The upper wing plate and the lower wing plate are connected into a whole through a supporting core to form an accommodating cavity for the zipper belts to pass through. The upper wing plate includes an upper plate body which is configured for clamping the zipper teeth from above and an upper flange part which is configured for clamping the zipper teeth from two sides. Because an inner wall of the upper plate body of the puller of the nylon zipper in the prior art has a flat surface, the sewing line protruding from the zipper teeth is subjected to the maximum pressing force and is in sliding friction with the inner wall of the accommodating cavity of the puller, so that the sewing line is easily broken by abrasion. The sewing line is broken by abrasion, which is the most cause of damage to the nylon zipper. if the sewing line can be prevented from being broken by abrasion, the service life of the nylon zipper can be greatly prolonged.

SUMMARY

An object of the present disclosure is to avoid the abrasion failure of sewing lines and prolong the service life of the nylon zipper by optimizing the structure of the zipper.

In order to achieve the above object of the present disclosure, a nylon zipper of the present disclosure includes zipper belts and a puller. A puller combines the two zipper belts to form the zipper which can be opened and closed. The zipper belt is formed by combining zipper teeth and a cloth tape through a sewing line. The puller includes an upper wing plate and a lower wing plate. The upper wing plate and the lower wing plate are connected into a whole through a supporting core to form an accommodating cavity for the zipper belts to pass through. The accommodating cavity is provided with two leading-in ports which is configured for leading in the two zipper belts, at one end adjacent to the supporting core, of the accommodating cavity. The accommodating cavity is provided with a meshing outlet which is configured for leading out the two meshed zipper belts at the other end thereof. The upper wing plate includes an upper plate body which is configured for clamping the zipper teeth from above and an upper flange part which is configured for clamping the zipper teeth from two sides. Two avoiding grooves are arranged at positions of an inner surface of the upper plate body corresponding to the sewing lines of the zipper belts. The avoiding grooves are recessed from the inner surface of the upper plate body, and extend through the upper plate body from the end where the leading-in ports are located to the end where the meshing outlet is located, which are used for avoiding sliding friction between the sewing lines and the upper plate body.

Preferably, two convex teeth are provided at two sides of the inner surface of the upper plate body (namely, the corner positions adjacent to the upper flange part), respectively. The convex teeth extend from the end where the leading-in ports are located, of the upper plate body to the end where the meshing outlet is located, and are used for filling the chamfering space of the zipper teeth and generating oblique inward and downward pressure on the zipper teeth, so that the zipper teeth are meshed. The convex teeth and the inner surface of the upper plate body form a stepped shape. The convex teeth are in arc transition with the upper flange part. The convex teeth structure enables the zipper teeth to have elastic retractable space in the horizontal direction, and the zipper teeth are automatically meshed at an optimal position.

Preferably, the lower wing plate includes a lower plate body configured for clamping the zipper teeth upwardly and a lower flange part configured for clamping the cloth tapes upwardly from two sides. The lower flange part protrudes from an inner surface of the lower plate body to form a groove. Under normal conditions, the sewing lines can be recessed in the surfaces of the cloth tapes due to a force, and there will be no direct contact between the sewing lines and the lower plate body. However, the lower wing plate can reduce the function force between the cloth tape and the lower plate body and prolong the service life of the zipper.

Preferably, an upper rib is provided at a connecting part of the upper plate body and the supporting core. The upper rib protrudes from the inner surface of the upper plate body. A lower rib is provided at a connecting part of the lower wing plate and the supporting core. The lower rib protrudes from an inner surface of the lower wing plate. The upper rib and the lower rib are used for filling the chamfering space of the zipper teeth and generating pressure on the zipper teeth, so that the zipper teeth are convenient to be meshed.

According to the nylon zipper of the present disclosure, the upper plate body is provided with the avoiding grooves, and the zipper teeth are in contact with the inner surface of the upper plate body, so that sliding friction between the sewing lines and the puller is avoided, and the service life of the zipper is prolonged.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view of a nylon zipper in the prior art.

FIG. 2 is a schematic view of a nylon zipper according to Embodiment 1.

FIG. 3 is a schematic view of zipper belts according to Embodiment 1.

FIG. 4 is a schematic view of a puller according to Embodiment 1.

FIG. 5 is an enlarged view of portion A of FIG. 4.

FIG. 6 is a schematic view of a nylon zipper according to Embodiment 2.

FIG. 7 is a schematic view of a puller according to Embodiment 2.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The preferred embodiments of the present disclosure will be further described with reference to the accompanying drawings.

Embodiment 1

A zipper in this embodiment is a positive nylon zipper. Referring to FIGS. 2-5, the nylon zipper in this embodiment includes zipper belts 102 and a puller 101. One puller 101 combines the two zipper belts 102 to form the zipper which can be opened and closed. The zipper belt 102 is formed by combining zipper teeth 122 wound around a central line 123 and a cloth tape 124 through a sewing line 121. The puller 101 includes a pull tab 131, an upper wing plate 132, and a lower wing plate 133. The upper wing plate 132 and the lower wing plate 133 are connected into a whole through a supporting core 134 to form an accommodating cavity for the zipper belts to pass through. The accommodating cavity is provided with two leading-in ports which is configured for respectively leading in the two zipper belts at one end adjacent to the supporting core, of the accommodating cavity. The accommodating cavity is provided with a meshing outlet which is configured for leading out the two meshed zipper belts at the other end thereof. The upper wing plate 132 includes an upper plate body 1321 which is configured for clamping the zipper teeth from above and an upper flange part 1322 which is configured for clamping the zipper teeth from two sides. Two avoiding grooves 111 are arranged at positions of an inner surface of the upper plate body 1321 corresponding to the sewing lines of the zipper belts. The avoiding grooves 111 are recessed from the inner surface of the upper plate body 1321, and extend through the upper plate body from the leading-in port end to the meshing outlet end, which can avoid sliding friction between the sewing lines and the upper plate body. A depth of the avoiding groove 111 can be set according to the protruding amount of the sewing line, and generally set to be 1 mm-3 mm. The pull tab 131 is connected above the upper wing plate 132.

Two convex teeth 202 are provided at two sides of an inner surface 201 of the upper plate body 1321 (namely, the corner positions adjacent to the upper flange part), respectively. The convex teeth 202 extend from the leading-in port end of the upper plate body to the meshing outlet end, and are used for filling the chamfering space of the zipper teeth and generating oblique inward and downward pressure on the zipper teeth, so that the zipper teeth are meshed. The convex teeth 202 and the inner surface of the upper plate body 1321 form a stepped shape, and the convex teeth 202 are in arc transition with the upper flange part 1322. The convex tooth structure enables the zipper teeth to have elastic retractable space in the horizontal direction, and the zipper teeth are automatically meshed at an optimal position.

The lower wing plate 133 includes a lower plate body 1331 configured for clamping the zipper teeth upwardly and a lower flange part 1332 configured for clamping the cloth tapes upwardly from two sides. The lower flange part 1332 protrudes from an inner surface of the lower plate body 1331 to form a groove 112. The lower wing plate structure can reduce the friction force between the cloth tapes 124 and the lower plate body 1331 and prolong the service life of the zipper.

An upper rib 141 is provided at a connecting part of the upper plate body 1321 of the upper wing plate 132 and the supporting core 134. The upper rib 141 protrudes from the inner surface of the upper plate body 1321. A lower rib 142 is provided at a connecting part of the lower wing plate 133 and the supporting core 134. The lower rib 142 protrudes from an inner surface of the lower wing plate. The upper rib and the lower rib are used for filling the chamfering space of the zipper teeth and generating pressure on the zipper teeth, so that the zipper teeth are convenient to be meshed.

Embodiment 2

A zipper in this embodiment is a negative nylon zipper. Referring to FIGS. 6 and 7, the nylon zipper in this embodiment includes zipper belts 102 and a puller 101. One puller 101 combines the two zipper belts 102 to form the zipper which can be opened and closed. The zipper belt 102 is formed by combining zipper teeth 122 wound around a central line 123 and a cloth tape 124 through a sewing line 121. The puller 101 includes a pull tab 131, an upper wing plate 132, and a lower wing plate 133. The upper wing plate 132 and the lower wing plate 133 are connected into a whole through a supporting core 134 to form an accommodating cavity for the zipper belts to pass through. The accommodating cavity is provided with two leading-in ports which is configured for respectively leading in the two zipper belts at one end adjacent to the supporting core, of the accommodating cavity. The accommodating cavity is provided with a meshing outlet which is configured for leading out the two meshed zipper belts at the other end thereof. The upper wing plate 132 includes an upper plate body 1321 which is configured for clamping the zipper teeth from above and an upper flange part 1322 which is configured for clamping the zipper teeth from two sides. Two avoiding grooves 111 are arranged at positions of an inner surface of the upper plate body 1321 corresponding to the sewing lines of the zipper belts. The avoiding grooves 111 are recessed from the inner surface of the upper plate body 1321, and extend through the upper plate body from the leading-in port end to the meshing outlet end, which can avoid sliding friction between the sewing lines and the upper plate body. The pull tab 131 is connected to an outer surface of the lower wing plate 133.

Two convex teeth are provided at two sides of the inner surface of the upper plate body 1321 (namely, the corner positions adjacent to the upper flange part), respectively. The convex teeth extend from the leading-in port end of the upper plate body to the meshing outlet end, and are used for filling the chamfering space of the zipper teeth and generating oblique inward and downward pressure on the zipper teeth, so that the zipper teeth are meshed. The convex teeth and the inner surface of the upper plate body 1321 form a stepped shape, and the convex teeth are in arc transition with the upper flange part 1322. The convex tooth structure enables the zipper teeth to have elastic retractable space in the horizontal direction, and the zipper teeth are automatically meshed at an optimal position.

The lower wing plate 133 includes a lower plate body 1331 configured for damping the zipper teeth upwardly and a lower flange part 1332 configured for clamping the cloth tapes upwardly from two sides. The lower flange part 1332 protrudes from an inner surface of the lower plate body 1331 to form a groove 112. The lower wing plate structure can reduce the friction force between the cloth tape 124 and the lower plate body 1331 and prolong the service life of the zipper.

An upper rib 141 is provided at a connecting part of the upper plate body 1321 of the upper wing plate 132 and the supporting core 134. The upper rib 141 protrudes from the inner surface of the upper plate body 1321. A lower rib 142 is provided at a connecting part of the lower wing plate 133 and the supporting core 134. The lower rib 142 protrudes from an inner surface of the lower wing plate. The upper rib and the lower rib are used for filling the chamfering space of the zipper teeth and generating pressure on the zipper teeth, so that the zipper teeth are convenient to be meshed.

Claims

1. A durable nylon zipper, formed by combining two zipper belts by a puller; the zipper belt being formed by combining zipper teeth and a cloth tape through a sewing line, wherein: the puller comprises an upper wing plate and a lower wing plate; the upper wing plate and the lower wing plate are connected into a whole through a supporting core to form an accommodating cavity for the zipper belts to pass through; the accommodating cavity is provided with two leading-in ports which is configured for leading in the two zipper belts, at one end adjacent to the supporting core, of the accommodating cavity; the accommodating cavity is provided with a meshing outlet which is configured for leading out the two meshed zipper belts at the other end thereof;the upper wing plate comprises an upper plate body configured to clamp the zipper teeth from above and an upper flange part configured to clamp the zipper teeth from two sides;two avoiding grooves are arranged at positions of an inner surface of the upper plate body corresponding to the sewing lines of the zipper belts; the avoiding grooves are recessed from the inner surface of the upper plate body, and extend through the upper plate body from the end where the leading-in ports are located to the end where the meshing outlet is located.

2. The durable nylon zipper of claim 1, wherein two convex teeth are provided at two sides of the inner surface of the upper plate body, respectively; the convex teeth extend from the end where the leading-in ports of the upper plate body are located to the end where the meshing outlet is located.

3. The durable nylon zipper of claim 2, wherein the convex teeth and the inner surface of the upper plate body form a stepped shape, and the convex teeth are in arc transition with the upper flange part.

4. The durable nylon zipper of claim 1, wherein the lower wing plate comprises a lower plate body configured to upwardly clamp the zipper teeth and a lower flange part configured to upwardly clamp the cloth tapes from two sides; the lower flange part protrudes from an inner surface of the lower plate body to form a groove.

5. The durable nylon zipper of claim 1, wherein an upper rib is provided at a connecting part of the upper plate body and the supporting core, and the upper rib protrudes from the inner surface of the upper plate body; a lower rib is provided at a connecting part of the lower wing plate and the supporting core, and the lower rib protrudes from an inner surface of the lower wing plate.