The principle of zipper of textile and garment accessories

　　Zipper, a frequent role in our lives, it looks like a simple garment accessories, but there is a lot of knowledge in, you really understand the principle of its work?

　　① The chain teeth of the zipper are divided into sizes, and the tooth shape is different, at the same time, the chain teeth on both sides of the same zipper must be the same size. The shape of the zipper head is rich in changes, which can be used as a handle and decoration. The zipper head can also be used as an insurance that will not automatically slide open when the zipper is pulled. The working principle of the zipper is very simple, that is, the two zipper belts through the role of the pull head, so that it can be pulled or pulled open at will, or it can be locked and opened at will.

　　Each tooth of a zipper chain is a small hook that can be matched with a hole under a small tooth on another cloth belt next to and opposite. The zipper is so strong that it can only be pulled open when the teeth are opened by sliding.

　　③ Working principle: The matching two chain teeth belt can be pulled or pulled apart at will by pulling the role of the head. When the pull head moves forward, the chain teeth feet of the two chain teeth belt are pushed due to the shape of the closing Angle of the inner cavity of the pull head, so that each other has regular mesh, which forms the closed state of the zipper. When the pull head is pulled to the top of the zipper, because the width after the top stop is greater than the width of the pull head cavity narrow, and the pull head plays a limiting role, so that the pull head will not fall off from the chain band, when the pull head is pulled back, because the split Angle (dihedral Angle) of the split Angle composed of the two sides of the pull head cavity column, the teeth of the chain teeth are separated from the valley one by one, so that the two chain teeth are separated. When the pull head is pulled to the bottom of the chain, the width of the lower top stop (also called the upper and lower code) is greater than the width of the mouth of the pull head, so that the pull head will not fall off from the chain band.