CN112932031B

CN112932031B - Self-aligning zipper with decoration

Info

Publication number: CN112932031B
Application number: CN202110153094.6A
Authority: CN
Inventors: 刘新伟
Original assignee: Shenzhen Longxin Zipper Co ltd
Current assignee: Shenzhen Longxin Zipper Co ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2022-09-23
Anticipated expiration: 2041-02-03
Also published as: CN112932031A

Abstract

A self-aligning zipper with trim, comprising: a first end body made of a first color material and having a first magnet and a protruding hook; a first link belt fixed to the first end body; a first decorative member made of a material of a second color and detachably connected to the first end body; a second end body made of a material of a first color and having a second magnet, a concave hook and a concave arc surface; a second link belt fixed to the second end body; a second trim piece made of a material of a second color removably attached to the second end body; and (5) pulling the body. The decorative piece not only has decorative effect, but also can be used as holding component of magnet, so that the structure and process of whole zipper can be simplified, and its cost can be reduced. And, owing to reach decorative effect through the material that decoration and tip body adopted different colours, can further reduce the cost of zip fastener.

Description

Self-aligning zipper with decoration

Technical Field

The invention relates to the field of zippers, in particular to a self-aligning zipper with a decoration piece.

Background

The zipper is widely applied to clothes, bags and the like. On the other hand, by arranging magnets on the end body of the fastener tape, the end portions of the fastener tape can be automatically combined by utilizing the attractive force between the magnets, thereby improving the convenience of use of the slide fastener. On the other hand, by providing a garnish on the teeth of the slide fastener or on the slider for opening and closing the slide fastener, the slide fastener can be provided with a decorative feature to improve its appearance.

However, the above-mentioned arrangement of the decoration on the teeth or the slider of the slide fastener has the disadvantages of difficult process, high cost, etc., and particularly, for the self-aligned slide fastener with the magnet, the process difficulty of the slide fastener is greatly increased, and the cost of the slide fastener is increased.

For self-aligning zippers, there are also the following drawbacks: 1. there is a contradiction between stability and convenience. When the attractive force of the magnet is small, the two chain belts of the zipper can be conveniently separated, but the joint strength of the two chain belts combined together by utilizing the attractive force is small, so that the stability is poor; on the contrary, when the attractive force of the magnet is large, the joint strength of the two links combined together is good, and the stability is good, but when the two links need to be separated, a large force needs to be applied, which results in poor convenience. 2. The reliability of self-alignment is poor. The magnets of the two link belts may catch from an incorrect position (e.g., from the sides of the magnets).

Disclosure of Invention

It is an object of the present invention to provide a self-aligning zipper with a trim element that addresses at least to some extent at least one of the above-identified deficiencies in the related art.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a self-aligning zipper with trim, comprising:

the first end part body is made of a material with a first color and is provided with a first magnet and a convex hook;

a first link belt having a plurality of teeth and fixed to the first end body;

a first ornamental piece made of a material of a second color, detachably connected to an end of the first end body remote from the second end body, and holding the first magnet inside the first end body;

a second end body made of a material of a first color and having a second magnet, a concave hook, and a concave arc surface for guiding the convex hook of the first end body to be correctly hooked with the concave hook of the second end body by an attractive force of the second magnet and the first magnet;

a second link belt having a plurality of teeth and fixed to the second end body;

the second decorating part is made of a material with a second color, is detachably connected to the end part of the second end part body far away from the first end part body, and keeps the second magnet in the second end part body; and

and the pulling body is slidably connected to the second chain belt and is used for meshing or separating the teeth of the first chain belt with or from the teeth of the second chain belt by sliding the pulling body.

Preferably, the first color is one of red and green and the second color is the other of red and green, or the first color is one of black and white and the second color is the other of black and white.

Preferably, the first decoration piece includes a first substrate, a first protruding buckle and a first limiting post, the first protruding buckle is disposed on a first protrusion at two opposite edges of the back surface of the first substrate and used for being buckled and connected with a first hole on the first end body, the thickness of the first protrusion satisfies that the first protrusion can deform when the side portion of the first protrusion is acted by an external force, and the first limiting post is disposed at the center of the back surface of the first substrate and used for being matched with the end portion of the first magnet to limit the movement of the first magnet and the movement of the first decoration piece; the second decoration includes the protruding knot of second base plate, second and the spacing post of second, the protruding knot of second sets up on the second arch of two edges that face each other at the back of second base plate, be used for with second hole on the second end body is buckled the joint, the bellied thickness of second satisfies when the bellied lateral part of second receives external force the second arch can take place deformation, the spacing post setting of second is in the center department at the back of second base plate, be used for with the tip cooperation restriction of second magnet the activity of second magnet and restriction the activity of second decoration.

Preferably, the first hole buckle is a through hole penetrating through the cavity wall of the accommodating cavity of the first magnet, and the second hole buckle is a through hole penetrating through the cavity wall of the accommodating cavity of the second magnet.

Preferably, at least a partial region of the front surface of the first substrate of the first deco member has a phosphor layer, and at least a partial region of the front surface of the second substrate of the second deco member has a phosphor layer.

Preferably, the first end body further includes a first magnetic conductive cover covering the four side portions and the rear end portion of the first magnet, and the second end body further includes a second magnetic conductive cover covering the four side portions and the rear end portion of the second magnet.

Preferably, the first end body further has a first outer extending sheet extending to the first chain belt, the first outer extending sheet has a first inclined edge, and the first inclined edge is used for pushing the first end body to move in a direction overcoming the attractive force of the first magnet and the second magnet by the extrusion force of the partition plate inside the pulling body to the first inclined edge.

Preferably, the second end body further has a second extending piece extending toward the second chain belt, the second extending piece has a first straight edge and a second oblique edge, the first straight edge is used for being matched with the outer side portion of the pull body to guide the pull body to slide linearly, and the second oblique edge is used for guiding the pull body to enable the outer side portion of the pull body to be aligned with the first straight edge of the second extending piece correctly.

Preferably, the first epitaxial wafer of the first end body and the second epitaxial wafer of the second end body are respectively provided with a clamping groove, the first epitaxial wafer of the first end body and the second epitaxial wafer of the second end body are respectively provided with a plurality of small holes in the groove wall of the clamping groove, the surface of the end of the first chain belt and the surface of the end of the second chain belt are respectively provided with a film in a melting manner, the film at the end of the first chain belt is embedded in the clamping groove of the first epitaxial wafer of the first end body and is melted into the small holes in the groove wall of the clamping groove to form a whole with the first epitaxial wafer, and the film at the end of the second chain belt is embedded in the clamping groove of the second epitaxial wafer of the second end body and is melted into the small holes in the groove wall of the clamping groove to form a whole with the second epitaxial wafer.

Compared with the prior art, the invention at least has the following beneficial effects:

the cost is low. The decorative part is arranged on the end body of the chain belt and is far away from the end body of the other chain belt, so that the decorative part can be used as a holding part of the magnet besides the decorative effect, the structure and the process of the whole zipper are simplified, and the cost is reduced. In addition, compared with the decorative effect of a structure or a shape, the decorative effect is achieved by adopting materials with different colors for the decorative part and the end body, namely the decorative effect is achieved by adopting the color, and the cost of the zipper can be further reduced.

Has both stability and convenience. Further behind the first epitaxial wafer of first end body sets up first hypotenuse, when the pull body slides to the direction that makes the tooth separation of two chain belts and is close the terminal point, the inside baffle of pull body can extrude first hypotenuse to promote the first end body to the direction motion of the attraction force of overcoming first magnet and second magnet, resistance when having reduced two end body separations, this makes can be with the great of the appeal setting of two magnets, and the phenomenon that is difficult to parts can not appear, thereby it has stability and convenience concurrently to make it.

The reliability of self-alignment is high. After the magnetic conductive cover is further arranged, the magnetic force lines on the back and the periphery of the magnet can be guided to the front of the magnet, so that the magnet of the two chain belts can be always attracted from the correct position, and the self-aligning reliability is better.

The decoration piece is firmly combined and is easy to replace. Further set up arch, protruding knot and spacing post at the base plate of decoration, after the hole that the tip body set up the through-hole structure was detained, spacing post can effectively avoid the decoration activity to drop, and sees through the through-hole and can promote protruding emergence deformation for protruding knot is deviate from the hole knot, thereby can conveniently pull down the decoration and change.

And further, after the front surface of the substrate of the decorating part is provided with the fluorescent layer, the effects of warning traffic participants and preventing traffic accidents can be achieved.

Drawings

FIG. 1 is a perspective view schematically showing a slide fastener of the present embodiment;

FIG. 2 is a state diagram thereof after separation;

FIG. 3 is an exploded view;

FIG. 4 is a back schematic view of the trim piece;

reference numerals:

1. a first trim piece; 2. a first magnet; 3. a first end body; 4. a convex hook; 5. a concave hook; 6. a second end body; 7. a second magnet; 8. a second decorative piece; 9. a second chain belt; 10. pulling the body; 11. a first chain belt; 12. teeth; 13. a clamping groove; 14. a first beveled edge; 15. a first epitaxial wafer; 16. a small hole; 17. a first straight side; 18. a second beveled edge; 19. a second epitaxial sheet; 31. an accommodating cavity; 32. a first hole buckle; 51. a concave arc surface; 1-1, a first substrate; 1-2, a first protrusion; 1-3, a first convex buckle; 1-4 and a first limit column.

Detailed Description

The invention is further described below with reference to the following figures and examples.

Referring to fig. 1 to 4, the zipper of the present embodiment is a self-aligned zipper with a decoration, which specifically includes: the first end body 3, the first chain belt 11, the first decorating part 1, the second end body 6, the second chain belt 9, the second decorating part 8 and the pulling body 10.

The first end body 3 is made of a material of a first color and has a first magnet 2 and a protruding hook 4. Specifically, the first end body 3 is opened with an accommodating cavity 31 for the first magnet 2, and the first decoration 1 is clamped at the mouth of the accommodating cavity 31, and plays a role of decoration on one hand and a role of holding the first magnet 2 at the first end body 3 on the other hand.

The first chain belt 11 has a plurality of teeth 12 and is fixed to the first end body 3. The base material of the first chain belt 11 is preferably, but not limited to, cloth or other fabric. In this embodiment, the first chain belt 11 and the first end body 3 are fixed in a manner that the first end body 3 has a first epitaxial wafer 15 extending toward the first chain belt 11, the first epitaxial wafer 15 has a clamping groove 13, the first epitaxial wafer 15 has a plurality of small holes 16 in a wall of the clamping groove 13, films are respectively melt-mounted on a surface of an end of the first chain belt 11, and the films at an end of the first chain belt 11 are embedded in the clamping groove 13 of the first epitaxial wafer 15 of the first end body 3 and are melted into the small holes 16 in the wall of the clamping groove 13 to form a whole with the first epitaxial wafer 15, so as to fix the first chain belt 11 to the first end body 3.

The first trim part 1 is made of a material of a second colour. Preferably, the second color and the first color are two contrasting colors, e.g., when the first color is black, the second color is white, or vice versa; when the first color is red, the second color is green, or vice versa. This has the advantage of low cost, as no changes in shape or structure are required to produce a decorative effect. As a better embodiment, a fluorescent layer may be further provided on at least a partial region of the front surface of the first substrate 1-1 of the first decoration element 1, so that the fluorescent layer can remind surrounding traffic participants while playing a decorative effect, thereby achieving an effect of avoiding traffic accidents.

As mentioned above, the first decoration 1 is snap-fitted (detachably attached) to the first end body 3, and functions to fix the first magnet 2 in addition to its decoration function. Specifically, in this embodiment, the first decorative member 1 includes a first substrate 1-1, a first buckle 1-3, and a first positioning post 1-4. The first convex buckles 1-3 are arranged on the back surface of the first base plate 1-1, the number of the first convex buckles is two, the first convex buckles are respectively arranged on the first bulges 1-2 at the two opposite edges, the first convex buckles 1-3 are used for being jointed with the first hole buckles 32 on the first end body 3, and the thickness of the first bulges 1-2 meets the following conditions: the first bulge 1-2 can deform when the side part of the first bulge 1-2 is acted by external force. The first hole fastener 32 is a through hole penetrating through the wall of the accommodating cavity 31 of the first magnet 2, so that when a small tool, such as a needle, is used to push the first protrusion 1-2 inwards through the through hole, the first protrusion 1-3 can be pulled out from the first hole fastener 32, and the first decoration 1 can be conveniently detached for replacement. The first limiting column 1-4 is arranged in the center of the back face of the first substrate 1-1 and used for being matched with the end part of the first magnet 2 to limit the movement of the first magnet 2 and the movement of the first decorating part 1, so that the first decorating part 1 can be prevented from moving and falling off, and the reliability is improved. The specific positions of the first trim 1 at the first end body 3 are: at the end remote from the second end body 6, does not affect the attraction of the first magnet 2 and the second magnet 7.

The second end body 6 is made of a material of a first color and has a second magnet 7, a concave hook 5 and a concave arc surface 51, the concave arc surface 51 is used for guiding the convex hook 4 of the first end body 3 to be correctly hooked with the concave hook 5 of the second end body 6 by the attraction force of the second magnet 7 and the first magnet 2. In particular, the second end body 6 is equipped with a housing cavity for the second magnet 7, and the second decoration 8 is clamped at the mouth of the housing cavity, so as to perform a decoration function on the one hand and a function of holding the second magnet 7 at the second end body 6 on the other hand.

The second chain band 9 has a plurality of teeth 12 and is fixed to the second end body 6. The base material of the second chain belt 9 is preferably, but not limited to, cloth or other fabric. In this embodiment, the second chain belt 9 and the second end body 6 are fixed in a manner that the second end body 6 has a second epitaxial wafer 19 extending toward the second chain belt 9, the second epitaxial wafer 19 is provided with a clamping groove, the second epitaxial wafer 19 is provided with a plurality of small holes 16 in the groove wall of the clamping groove, the surfaces of the ends of the second chain belt 9 are respectively provided with a film in a melting manner, the film at the end of the second chain belt 9 is embedded in the clamping groove of the second epitaxial wafer 19 of the second end body 6 and is melted into the small holes 16 in the groove wall of the clamping groove to form a whole with the second epitaxial wafer 19, so as to fix the second chain belt 9 to the second end body 6.

The second trim piece 8 is made of a material of a second color. The selection of the second color and the first color is as described above and will not be described further herein.

As mentioned above, the second ornamental piece 8 is snap-fitted (detachably attached) to the second end body 6, and functions to fix the second magnet 7 in addition to its ornamental function. In one embodiment, the second decorative member 8 includes a second base plate, a second stud, and a second post. The setting of the protruding knot of second is in the back of second base plate, quantity is two, sets up respectively on the second arch of two edges that face each other, and the protruding knot of second is used for detaining the joint with the second hole on the second end body 6, and the bellied thickness of second satisfies following condition: the second protrusion can deform when the side of the second protrusion is acted by external force. The second hole is a through hole penetrating through the wall of the accommodating cavity 31 of the second magnet 7, so that when a small tool, such as a needle, is used to push the second protrusion inwards through the through hole, the second protrusion can be pulled out of the second hole, and the second decoration part 8 can be conveniently detached for replacement. The second limiting column is arranged at the center of the back of the second substrate and used for being matched with the end part of the second magnet 7 to limit the movement of the second magnet 7 and the movement of the second decorating part 8, so that the second decorating part 8 can be prevented from moving and falling off, and the reliability is improved. The second garnish 8 has substantially the same structure and the same manner of installation as the first garnish 1. The specific positions of the second garnish 8 at the second end body 6 are: at the end remote from the first end body 3, does not affect the attraction of the first magnet 2 and the second magnet 7.

A pull body 10 is slidably connected to the second chain belt 9 for engaging or disengaging the teeth 12 of the first chain belt 11 with or from the teeth 12 of the second chain belt 9 by pulling the pull body 10.

The first end body 3 may further include a first magnetic conductive cover covering four side portions and a rear end portion of the first magnet 2, and the second end body 6 may further include a second magnetic conductive cover covering four side portions and a rear end portion of the second magnet 7. The magnetic conducting cover respectively guides the magnetic force lines around the first magnet 2 and the magnetic force lines around the second magnet 7 to the front surface of the magnets, so that the magnets of the two chain belts can be always attracted from the correct positions, and the self-alignment reliability of the first chain belt 11 and the second chain belt 9 is ensured.

The first external extension 15 of the first end body 3 also has a first inclined edge 14, said first inclined edge 14 being used for pushing the first end body 3 to move in a direction overcoming the attraction force of the first magnet 2 and the second magnet 7 by the pressing force of the partition inside the pull body 10 on the first inclined edge 14. That is, the first inclined edge 14 assists the first end body 3 and the second end body 6 to be separated by a pulling force during pulling the pulling body 10, which makes it possible to design the attractive force of the first magnet 2 and the second magnet 7 a little more without causing difficulty in separating them, and it is possible to achieve the object of combining good stability and convenience in separation.

The second end body 6 further has a second outer extension 19 extending towards the second chain belt 9, the second outer extension 19 has a first straight edge 17 and a second inclined edge 18, the first straight edge 17 is used for matching with the outer side of the pull body 10 to guide the pull body 10 to slide linearly, and the second inclined edge 18 is used for guiding the pull body 10 to make the outer side of the pull body 10 align with the first straight edge 17 of the second outer extension 19 correctly.

The use method of the zipper is as follows: when the first end body 3 is close to the second end body 6, the attractive force of the first magnet 2 and the second magnet 7 causes the first end body 3 and the second end body 6 to be jointed, in the process, the convex hook 4 on the first end body 3 moves along the concave arc surface 51 on the second end body 6, so that the convex hook 4 is correctly hooked with the concave hook 5 on the second end body 6, and the first end body 3 and the second end body 6 are kept in the jointed state. The pull bodies 10 are then pulled along the second chain 9, the sliding of the pull bodies 10 causing the teeth 12 of the first chain 11 to engage with the teeth 12 of the second chain 9. Then, when the pulling body 10 is pulled in the reverse direction, the teeth 12 of the first chain belt 11 and the teeth 12 of the second chain belt 9 are separated by the sliding of the pulling body 10. When the pulling body 10 slides to the outside of the pulling body 10 and contacts with the second inclined edge 18 on the second outer extension 19 of the second end body 6, the second inclined edge 18 guides the pulling body 10 to be correctly aligned with the first inclined edge 17 on the second outer extension 19, and then when the pulling body 10 slides further, the first inclined edge 17 plays a role in supporting and guiding the sliding of the pulling body 10, and in the process of the further sliding, the partition board inside the pulling body 10 generates a pressing force on the first inclined edge 14 on the first outer extension 15 of the first end body 3, and the pressing force pushes the first end body 3 to move in a direction overcoming the attraction force of the first magnet 2 and the second magnet 7, so that the resistance force for separating the first end body 3 from the second end body 6 is reduced, and the first chain belt 11 can be separated from the second chain belt 9 by one hand.

As can be seen from the above, the slide fastener of the present embodiment has the following advantageous effects:

Has both stability and convenience. The first extension piece 15 of the first end body 3 has a first bevel edge 14, when the pull body 10 slides to a direction of separating the teeth 12 of the two chain belts to approach a terminal point, the first bevel edge 14 is squeezed by a partition plate inside the pull body 10, so that the first end body 3 is pushed to move in a direction overcoming the attractive force of the first magnet 2 and the second magnet 7, the resistance when the two end bodies are separated is reduced, the attractive force of the two magnets can be set to be larger, the phenomenon of difficult separation cannot occur, and the stability and convenience are achieved.

The reliability of self-alignment is high. The magnetic conductive cover can guide the magnetic force lines on the back and the periphery of the magnet to the front of the magnet, so that the magnets of the two chain belts can be always attracted from the correct position, and the self-aligning reliability is better.

The decoration piece is firmly combined and is easy to replace. Because the base plate at the decoration sets up arch, protruding knot and spacing post, sets up the hole of through-hole structure at the tip body and detains, spacing post can effectively avoid the decoration activity to drop, and sees through the through-hole and can promote protruding emergence deformation for protruding knot is deviate from the hole is detained, thereby can conveniently pull down the decoration and change.

And a fluorescent layer is further arranged on the front surface of the substrate of the decorating part, so that the effects of warning traffic participants and preventing traffic accidents can be achieved.

The present invention has been described in detail with reference to the specific embodiments, and the detailed description is only for the purpose of helping those skilled in the art understand the present invention, and is not to be construed as limiting the scope of the present invention. Various modifications, equivalent changes, etc. made by those skilled in the art under the spirit of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-aligning zipper with a trim element, comprising:

a first end body (3) made of a material of a first color and having a first magnet (2) and a protruding hook (4);

a first chain belt (11) having a plurality of teeth (12) and fixed to the first end body (3);

a first ornamental piece (1), made of a material of a second colour, removably connected to the end of the first end body (3) remote from the second end body (6) and retaining the first magnet (2) inside the first end body (3);

a second end body (6) made of a material of a first colour and having a second magnet (7), a female hook (5) and a female arc surface (51), said female arc surface (51) being intended to guide the male hook (4) of the first end body (3) to be correctly hooked with the female hook (5) of the second end body (6) by the attraction of the second magnet (7) and the first magnet (2);

a second chain band (9) having a plurality of teeth (12) and fixed to the second end body (6);

a second ornamental piece (8), made of a material of a second colour, removably connected to the end of the second end body (6) remote from the first end body (3) and retaining the second magnet (7) inside the second end body (6);

a pull body (10) slidably connected to the second chain belt (9) for engaging or disengaging the teeth (12) of the first chain belt (11) with or from the teeth (12) of the second chain belt (9) by sliding the pull body (10);

the first decorating part (1) comprises a first base plate (1-1), a first convex buckle (1-3) and a first limiting column (1-4), the first convex buckles (1-3) are arranged on the first bulges (1-2) at two opposite edges of the back surface of the first base plate (1-1) and used for being jointed with the first hole buckles (32) on the first end body (3), the thickness of the first bulge (1-2) meets the requirement that the first bulge (1-2) can deform when the side part of the first bulge (1-2) is acted by external force, the first limit column (1-4) is arranged at the center of the back surface of the first substrate (1-1), for limiting the movement of the first magnet (2) and the movement of the first decoration (1) in cooperation with the end of the first magnet (2);

the second decorating part (8) comprises a second base plate, a second convex buckle and a second limiting column, the second convex buckle is arranged on a second bulge at two opposite edges of the back surface of the second base plate and used for being connected with a second hole buckle on the second end body (6), the thickness of the second bulge meets the requirement that the second bulge can deform when the side part of the second bulge is acted by external force, and the second limiting column is arranged at the center of the back surface of the second base plate and used for being matched with the end part of the second magnet (7) to limit the movement of the second magnet (7) and limit the movement of the second decorating part (8);

the first hole buckle (32) is a through hole penetrating through the cavity wall of the accommodating cavity (31) of the first magnet (2), and the second hole buckle is a through hole penetrating through the cavity wall of the accommodating cavity of the second magnet (7);

the first end body (3) further comprises a first magnetic conduction cover, the first magnetic conduction cover covers four side portions and a rear end portion of the first magnet (2), the second end body (6) further comprises a second magnetic conduction cover, and the second magnetic conduction cover covers four side portions and a rear end portion of the second magnet (7).

2. The self-aligning zipper with trim of claim 1, wherein the first color is one of red and green and the second color is the other of red and green, or the first color is one of black and white and the second color is the other of black and white.

3. Self-aligning zipper with trim according to claim 1, characterized in that at least a partial area of the front face of the first substrate (1-1) of the first trim (1) has a fluorescent layer and at least a partial area of the front face of the second substrate of the second trim (8) has a fluorescent layer.

4. A self-aligning zipper with trim according to claim 1, wherein the first end body (3) further has a first outer tab (15) extending towards the first stringer (11), the first outer tab (15) having a first bevelled edge (14), the first bevelled edge (14) being adapted to push the first end body (3) towards a direction overcoming the attractive forces of the first magnet (2) and the second magnet (7) by the pressing force of a partition inside the pull body (10) against the first bevelled edge (14).

5. A self-aligning zipper with a decorative element according to claim 4 wherein the second end body (6) further has a second outer tab (19) extending towards the second stringer (9), the second outer tab (19) having a first straight edge (17) and a second bevelled edge (18), the first straight edge (17) being adapted to cooperate with an outer side of the puller (10) to guide the puller (10) for linear sliding movement, the second bevelled edge (18) being adapted to guide the puller (10) such that the outer side of the puller (10) is correctly aligned with the first straight edge (17) of the second outer tab (19).

6. A self-aligning zipper with trim according to claim 5, characterized in that the first outer extension (15) of the first end body (3) and the second outer extension (19) of the second end body (6) are provided with a clip groove (13), respectively, the first outer extension (15) of the first end body (3) and the second outer extension (19) of the second end body (6) are provided with a plurality of small holes (16) in the groove wall of the clip groove (13), respectively, the surface of the end of the first link belt (11) and the surface of the end of the second link belt (9) are respectively provided with a film melt, the film of the end of the first link belt (11) is embedded in the clip groove (13) of the first outer extension (15) of the first end body (3) and is melted into the small holes (16) of the groove wall of the clip groove (13) to be integrated with the first outer extension (15), the film at the end part of the second chain belt (9) is embedded in the clamping groove of the second extension sheet (19) of the second end part body (6) and is fused into the small hole (16) of the groove wall of the clamping groove to form a whole with the second extension sheet (19).