Safety zipper with double-layer zipper cloth and zipper teeth

Abstract

The invention discloses a safety zipper with double-layer zipper cloth and zipper teeth. The zipper comprises first zipper cloth, second zipper cloth and a double-layer zipper head formed integrally. The first zipper cloth comprises first left zipper cloth, first right zipper cloth and first zipper teeth. The second zipper cloth comprises second left zipper cloth, second right zipper cloth and second zipper teeth. The double-layer zipper head comprises first zipper teeth and a second zipper head. The sum of the width of the first left zipper cloth and two meshed first zipper teeth is equal to that of the second left zipper cloth, the sum of the width of the second right zipper cloth and the two meshed second zipper teeth is equal to that of the first right zipper cloth, the meshed first zipper teeth and the meshed second zipper teeth are arranged at intervals through the second left zipper cloth, and the meshed first zipper teeth and the meshed second zipper teeth are not located on the same horizontal level. After the zipper piece is pulled, the first zipper head can move synchronously between the first zipper teeth, the second zipper head can move synchronously between the second zipper teeth. The safety zipper has the advantages of being high in safety and anti-theft performance and the like.

Description

technical field [0001] The invention relates to the technical field of slide fasteners, in particular to a safety slide fastener with double-layer chain cloth chain teeth. Background technique [0002] Bags are used to load clothes, luggage and other daily necessities in our daily life, especially in travel, and the closure function of the zipper of the bag is very important. Traditional bags are usually single-layer chain-tooth nylon zippers. The zipper is tied to the inner side of the two cloth strips and stitched with a spiral coil chain. One end of each chain buckle unit of the chain is pressed into a wide buckle. Therefore, when a slide fastener puller slides, the fastening parts of the two chains can be fastened or disengaged from each other. However, the anti-theft mechanism of this single-layer zipper is weak, and the single-layer zipper is easy to be damaged and stolen. In response to this problem, a double-layer zipper design has appeared on the market. The doubl...

AI Technical Summary

Problems solved by technology

[0004] 2) Since the zipper has upper and lower layers, and the existing zipper puller is mainly composed of the upper guide plate and the lower guide plate, and then the space for the movement of the chain teeth is formed between the upper guide plate and the lower guide plate, because the respective edges of the upper and lower guide plates are horizontal. Therefore, when the zipper is closed, the positions of the upper and lower and left and right chain teeth are unstable, making it impossible to smoothly engage the teeth, often resulting in the phenomenon that the teeth can be engaged on one side, and the teeth on the other side are violent, especially at the curved surface, it is easy to pull unsmoothly , the phenomenon of abnormal sliding has caused some inconvenience to users

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