CN110916298A

CN110916298A - Durable nylon zipper

Info

Publication number: CN110916298A
Application number: CN201911392274.9A
Authority: CN
Inventors: 钱真友
Original assignee: Guangzhou Tigernu Leather Co Ltd
Current assignee: Guangzhou Tigernu Leather Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-03-27
Also published as: EP4085786A1; US20230037363A1; WO2021136438A1; EP4085786A4

Abstract

The invention relates to the technical field of nylon zippers, and provides a durable nylon zipper formed by combining two zipper tapes through a pull head. The chain belt is formed by combining the chain teeth and the cloth belt by sewing threads. The pull head comprises an upper wing plate and a lower wing plate, wherein the upper wing plate and the lower wing plate are connected into a whole through a support core to form an accommodating cavity for the chain belt to pass through. Two leading-in ports are arranged at the end, close to the support core, of the accommodating cavity and are used for leading in the two chain belts respectively. The other end of the accommodating cavity is provided with an engaging outlet for leading out the two chain belts after being engaged. The upper wing plate comprises an upper plate body for clamping the zipper teeth from the upper part and an upper flange part for clamping the zipper teeth from two sides. Two abdicating grooves are arranged on the inner surface of the upper plate body corresponding to the positions of the chain belt sewing threads. The receding groove is recessed from the inner surface of the upper plate body and penetrates through the upper plate body from the inlet end to the engaging outlet end. According to the nylon zipper, the upper plate body is provided with the abdicating groove, so that sliding friction between a sewing line and the pull head is avoided, and the service life of the zipper is prolonged.

Description

Durable nylon zipper

Technical Field

The invention 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 teeth of the nylon zipper are formed by winding nylon monofilament around a central line through a heating pressing die. Compared with metal zippers and resin zippers, the nylon zipper has the characteristics of low cost, high yield and high popularization rate.

As shown in fig. 1, the teeth 22 of the nylon slide fastener in the prior art are formed by winding a nylon monofilament around a central line 23 by a heating die, and the teeth at both sides and a cloth tape 24 at both sides are combined by a sewing thread 21 to form two fastener tapes 02 of the slide fastener, and then the two fastener tapes are combined by a slider 01 to form a slide fastener which can be opened and closed. Since the sprocket 22 is a hard material, the sewing thread 21 is inevitably protruded from the upper surface of the sprocket.

The slider 01 combines the two chain belts by extruding the chain teeth through the inner wall of the containing cavity. The slider includes an upper wing plate (wing plate contacting and pressing the fastener element) and a lower wing plate (wing plate contacting and pressing the tape). The upper wing plate and the lower wing plate are connected into a whole through the support core to form an accommodating cavity for the chain belt to pass through. The upper wing plate comprises an upper plate body for clamping the zipper teeth from the upper part and an upper flange part for clamping the zipper teeth from two sides. Because the inner wall of the upper plate body of the pull head of the nylon zipper in the prior art is a flat plane, the sewing thread protruding from the zipper teeth is subjected to the maximum extrusion force and is in sliding friction with the inner wall of the containing cavity of the pull head, so that the sewing thread is easy to break. The thread is broken by abrasion, which is the most cause of damage to the nylon slide fastener. If the sewing thread can be prevented from being broken by grinding, the service life of the nylon zipper can be greatly prolonged.

Disclosure of Invention

The invention aims to avoid the abrasion failure of sewing threads and prolong the service life of the nylon zipper by optimizing the structure of the zipper.

In order to achieve the above object, the nylon slide fastener of the present invention includes a fastener tape and a slider. And a pull head combines the two chain belts to form a zipper which can be opened and closed. The chain belt is formed by combining chain teeth and a cloth belt through sewing threads. The pull head comprises an upper wing plate and a lower wing plate, wherein the upper wing plate and the lower wing plate are connected into a whole through a support core to form an accommodating cavity for the chain belt to pass through. Two leading-in ports are arranged at the end, close to the support core, of the accommodating cavity and used for leading in the two chain belts. The other end of the accommodating cavity is provided with an engaging outlet for leading out the two chain belts after being engaged. The upper wing plate comprises an upper plate body for clamping the zipper teeth from the upper part and an upper flange part for clamping the zipper teeth from two sides. Two abdicating grooves are arranged on the inner surface of the upper plate body corresponding to the positions of the chain belt sewing threads. The abdicating groove is sunken from the inner surface of the upper plate body and penetrates through the upper plate body from the leading-in port end to the meshing outlet end, and is used for avoiding sliding friction between a sewing line and the upper plate body.

Preferably, two sides of the inner surface of the upper plate body (i.e. the corner positions near the upper flange part) are respectively provided with a convex tooth. The convex teeth extend from the inlet end to the meshing outlet end of the upper plate body and are used for filling the chamfering space of the chain teeth and forming oblique inward and downward pressure on the chain teeth, so that the chain teeth are meshed conveniently. The convex teeth and the inner surface of the upper plate body are in a ladder shape. The convex teeth are in arc transition with the upper flange part. The convex tooth structure enables the chain teeth to have elastic expansion space in the horizontal direction, and the chain teeth are automatically meshed at the optimal position.

Preferably, the lower wing plate comprises a lower plate body which clamps the zipper teeth upwards and a lower flange part of which two sides clamp the cloth belt upwards. The lower flange part protrudes from the inner surface of the lower plate body to form a groove. Under normal conditions, the sewing thread can be sunken in the strap surface because of the atress, can not form direct contact between sewing thread and the lower plate body. But the lower wing plate structure can reduce the friction force between the cloth belt and the lower plate body and prolong the service life of the zipper.

Preferably, the connecting part of the upper plate body and the support core is provided with an upper rib. The upper ribs are protruded on the inner surface of the upper plate body. And a lower rib is arranged at the connecting part of the lower wing plate and the support core. The lower rib is protruded on the inner surface of the lower wing plate. The upper rib and the lower rib are used for filling the chamfering space of the sprocket and generating pressure on the sprocket, so that the sprocket is convenient to mesh.

According to the nylon zipper, the upper plate body is provided with the abdicating groove, and the zipper teeth are contacted with the inner surface of the upper plate body, so that sliding friction between a sewing line and a pull head is avoided, and the service life of the zipper is prolonged.

Drawings

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

FIG. 2 is a schematic view showing a nylon slide fastener according to an embodiment;

FIG. 3 is a schematic view of a chain belt according to an embodiment;

FIG. 4 is a schematic view of a slider according to an embodiment;

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

FIG. 6 is a schematic view showing the structure of a nylon slide fastener according to the second embodiment;

FIG. 7 is a schematic structural view of a second slider according to the embodiment.

Detailed Description

The preferred embodiments of the present invention will be further described with reference to the accompanying drawings in which:

the first embodiment is as follows:

the zipper of this embodiment is a positive nylon zipper. As shown in fig. 2 to 5, the nylon slide fastener of the present embodiment includes a fastener tape 102 and a slider 101. A slider 101 joins the two fastener tapes 102 to form a slide fastener which can be opened and closed. The fastener tape 102 is formed by joining a fastener element 122 wound around a center line 123 with a tape 124 by a sewing thread 121. The slider 101 comprises a pull tab 131, an upper wing plate 132 and a lower wing plate 133, wherein the upper wing plate 132 and the lower wing plate 133 are connected into a whole through a support core 134 to form an accommodating cavity for a chain belt to pass through. Two leading-in ports are arranged at the end, close to the support core, of the accommodating cavity and are used for leading in the two chain belts respectively. The other end of the accommodating cavity is provided with an engaging outlet for leading out the two chain belts after being engaged. The upper wing plate 132 includes an upper plate body 1321 that holds the sprocket from above and an upper flange 1322 that holds the sprocket from both sides. Two abdicating grooves 111 are formed on the inner surface of the upper plate body 1321 at positions corresponding to the chainbelt sewing threads. The receding groove 111 is recessed from the inner surface of the upper plate body 1321 and penetrates the upper plate body from the introduction port end to the engagement outlet end for avoiding sliding friction between the sewing thread and the upper plate body. The depth of the abdicating groove 111 can be set according to the protruding amount of the sewing thread, and generally set to 1-3 mm. A pull tab 131 is attached above the upper flap 132.

One convex tooth 202 is respectively arranged on both sides (i.e. near the corner position of the upper flange part) of the inner surface 201 of the upper plate body 1321. The convex teeth 202 extend from the inlet end to the meshing outlet end of the upper plate body, and are used for filling the chamfering space of the sprocket and forming oblique inward downward pressure on the sprocket, so that the sprocket is meshed conveniently. The teeth 202 are stepped with the inner surface of the upper plate body 1321 and are in arc transition with the upper flange 1322. The convex tooth structure enables the chain teeth to have elastic expansion space in the horizontal direction, and the chain teeth are automatically meshed at the optimal position.

The lower wing plate 133 includes a lower plate body 1331 gripping the fastener elements upward and a lower flange part 1332 gripping the cloth tape upward at both sides. The lower flange part 1332 protrudes from the inner surface of the lower plate body 1331 to form the groove 112. The lower wing plate structure can reduce the friction force between the cloth belt 124 and the lower plate body 1331 and prolong the service life of the zipper.

An upper rib 141 is arranged at the connecting part of the upper plate body 1321 of the upper wing plate 132 and the support core 134. The upper rib 141 protrudes from the inner surface of the upper plate body 1321. The connection part of the lower wing plate 133 and the core 134 is provided with a lower rib 142. The lower rib 142 protrudes from the inner surface of the lower wing panel. The upper rib and the lower rib are used for filling the chamfering space of the sprocket and generating pressure on the sprocket, so that the sprocket is convenient to mesh.

Example two:

the zipper of this embodiment is a reversed nylon zipper. As shown in fig. 6 and 7, the nylon slide fastener of the present embodiment includes a fastener tape 102 and a slider 101. A slider 101 joins the two fastener tapes 102 to form a slide fastener which can be opened and closed. The fastener tape 102 is formed by joining a fastener element 122 wound around a center line 123 with a tape 124 by a sewing thread 121. The slider 101 comprises a pull tab 131, an upper wing plate 132 and a lower wing plate 133, wherein the upper wing plate 132 and the lower wing plate 133 are connected into a whole through a support core 134 to form an accommodating cavity for a chain belt to pass through. Two leading-in ports are arranged at the end, close to the support core, of the accommodating cavity and are used for leading in the two chain belts respectively. The other end of the accommodating cavity is provided with an engaging outlet for leading out the two chain belts after being engaged. The upper wing plate 132 includes an upper plate body 1321 that holds the sprocket from above and an upper flange 1322 that holds the sprocket from both sides. Two abdicating grooves 111 are formed on the inner surface of the upper plate body 1321 at positions corresponding to the chainbelt sewing threads. The receding groove 111 is recessed from the inner surface of the upper plate body 1321 and penetrates the upper plate body from the introduction port end to the engagement outlet end for avoiding sliding friction between the sewing thread and the upper plate body. The pull tab 131 is attached to the outer surface of the lower flap 133.

Two sides of the inner surface of the upper plate body 1321 (i.e., the corner positions near the upper flange part) are respectively provided with a convex tooth. The convex teeth extend from the inlet end to the meshing outlet end of the upper plate body and are used for filling the chamfering space of the chain teeth and forming oblique inward and downward pressure on the chain teeth, so that the chain teeth are meshed conveniently. The teeth are stepped with the inner surface of the upper plate body 1321 and are in arc transition with the upper flange 1322. The convex tooth structure enables the chain teeth to have elastic expansion space in the horizontal direction, and the chain teeth are automatically meshed at the optimal position.

Claims

1. A durable nylon zipper is formed by combining two chain belts by a pull head; the chain belt is formed by combining the chain teeth and the cloth belt through a sewing thread, and is characterized in that:

the zipper head 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 support core to form an accommodating cavity for the zipper belt to pass through; two leading-in ports are arranged at the end, close to the support core, of the accommodating cavity and are used for leading in two chain belts; the other end of the accommodating cavity is provided with an engaging outlet for leading out the two meshed chain belts;

the upper wing plate comprises an upper plate body for clamping the zipper teeth from the upper part and an upper flange part for clamping the zipper teeth from two sides;

two abdicating grooves are arranged on the inner surface of the upper plate body at positions corresponding to the chain sewing threads of the chain belt; the receding groove is recessed from the inner surface of the upper plate body and penetrates through the upper plate body from the inlet end to the engaging outlet end.

2. A durable nylon zipper as recited in claim 1, wherein: two sides of the inner surface of the upper plate body are respectively provided with a convex tooth; the convex teeth extend from the inlet end to the meshing outlet end of the upper plate body.

3. A durable nylon zipper as recited in claim 2, wherein: the convex teeth and the inner surface of the upper plate body are in a ladder shape, and the convex teeth and the upper flange are in arc transition.

4. A durable nylon zipper as recited in claim 1, wherein: the lower wing plate comprises a lower plate body which clamps the zipper teeth upwards and a lower flange part of which two sides clamp the cloth belt upwards; the lower flange part protrudes from the inner surface of the lower plate body to form a groove.

5. A durable nylon zipper as claimed in any one of claims 1 to 4, wherein: the connecting part of the upper plate body and the supporting core is provided with an upper rib which protrudes out of the inner surface of the upper plate body; the connecting part of the lower wing plate and the support core is provided with a lower rib, and the lower rib protrudes out of the inner surface of the lower wing plate.