Back pull head of nylon zipper

Abstract

The invention discloses a back pull head of a nylon zipper. A long-strip-shaped belt separation column is arranged on an upper boat plate. An upper zipper guide concave part and a lower zipper guide convex part are correspondingly arranged on the opposite inner surfaces, in a pull head inner cavity, of the upper boat plate and a lower boat plate, and a zipper guide groove is formed between the upper zipper guide concave part and the lower zipper guide convex part. A long-strip-shaped protrusion is formed in the middle of the lower zipper guide convex part arranged on the lower boat plate and is arranged corresponding to the belt separation column, and the left side, the right side, the front end and the rear end of the long-strip-shaped protrusion are inclined surfaces so that the lower zipper guide convex part with the front, the rear, the left and the right lower and the middle higher can be formed. The upper zipper guide concave part arranged on the upper boat plate comprises a left inclined block and a right inclined block which are arranged on the left side and the right side of the belt separation column, the left inclined block and the right inclined block incline upwards oppositely, and the front end and the rear end of the left inclined block and the front end and the rear end of the right inclined block are inclined surfaces so that the upper zipper guide concave part with the front, the rear, the left and the right lower and the middle higher can be formed. According to the zipper, a hook can act on zipper teeth more accurately, the probability that the zipper slips down is reduced, and the self-locking strength of the zipper is obviously improved.

Description

technical field [0001] The invention relates to a slide fastener, in particular to the improvement of the structure of the back pull head of the nylon slide fastener. Background technique [0002] Nylon zippers are different from metal and plastic-steel zippers. The front and back of metal and plastic-steel zippers are the same, and the chain teeth are directly on the outside, wrapping the cloth belt. The nylon zipper is sewn up, one side is outside, and the other side is sewn up with a cloth tape. The side where the chain teeth are exposed is called the front side, and the side where the chain teeth cannot be seen is called the back side. The back pull product is a product that uses the nylon back (only the side of the cloth tape) as the front of the zipper. If this zipper is equipped with an automatic head with a self-locking function, the automatic head with the self-locking function needs to be clothed first. The covered chain teeth are exposed, so that the horse hook o...

AI Technical Summary

Problems solved by technology

Because the cloth tape can easily interfere with the effect of the hook on the chain teeth, the back pull zipper of the current nylon zipper generally has problems such as insufficient self-locking and easy slipping of the product.

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