Double-head zipper and draw-bar box

Abstract

The invention discloses a double-head zipper and a draw-bar box, and relates to the technical field of nylon zippers. The double-head zipper comprises two tooth chain belts, two pullers, a first socket assembled at one end of each tooth chain belt, a first insertion pipe matched with the first socket, a second socket assembled at the other end of each tooth chain belt and a second insertion pipe matched with the second socket. A first supporting part is arranged at the end, close to the zipper teeth, of the first insertion pipe and away from the first insertion seat, a second supporting part symmetrical to the first supporting part is arranged on the first insertion seat, a third supporting part is arranged at the position, close to the zipper teeth and the second insertion seat, of the second insertion pipe, and a fourth supporting part symmetrical to the third supporting part is arranged on the second insertion seat. The draw-bar box comprises a box body, a box cover, a first placing layer, a second placing layer and a double-head zipper. The first placing layer is detachably connected into the box body through the double-head zipper, and the second placing layer is detachably connected into the box cover through the double-head zipper. According to the technical scheme, the double-head zipper and the draw-bar box have the advantages of being smooth in lifting, attractive, wide in application range and good in user experience.

Description

technical field [0001] The invention relates to the technical field of nylon zippers, in particular to a double-head zipper and a trolley case. Background technique [0002] Zipper is a connecting piece that relies on continuous arrangement of chain teeth to make items merge or separate, and is now widely used in clothing, bags, tents, etc. According to the material of the zipper, the zipper is divided into three categories: metal zipper, resin zipper and nylon zipper. Compared with metal zippers and resin zippers, nylon zippers have the characteristics of low cost, large output and high penetration rate. [0003] The commonly existing nylon zippers at present are single-head closed-end zippers and double-pull closed-end zippers, which can no longer meet the needs of users. The chain elements at the end of the socket and the insertion pipe will gradually become horizontal due to the extrusion of the socket or the insertion pipe, resulting in misalignment of the chain eleme...

AI Technical Summary

Problems solved by technology

[0003] The commonly existing nylon zippers at present are single-head closed-end zippers and double-pull closed-end zippers, which can no longer meet the needs of users. The chain teeth at the end of the socket and the insertion tube will gradually become horizontal due to the extrusion of the socket or the insertion tube, resulting in misalignment of the chain teeth and affecting the smoothness of the zipper pull

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