Zipper is very common and common in our life. We can see it on many products in our life. Everyone is not unfamiliar with zipper. It relies on the continuous arrangement of fastener elements to combine or separate items. It is widely used in clothing, bags, tents, etc. A zipper is a chain attached to something to tighten, stabilize or guide it. The following will give you a detailed introduction to the little knowledge about zipper.
First, the principle of zipper
The working principle of the zipper is generally explained by the principle of resultant force and component force. When the zipper is opened, the triangular object moves together with the zipper between the two chains, and the pulling force of the hand produces two component forces on the triangular object;
In the case of a small angle, the force acting on the sharp corner is very large, and the two component forces exert force on the zipper and the component force is greater than the vertical downward resultant force, that is, the component force is greater than the pulling force of the hand, so it is difficult to directly separate Open zippers are easily separated by triangles.
Second, the overview of the zipper
1. The definition of zipper:
A fastener consisting of a row of metal or plastic teeth on each of two straps, used to connect the edges of an opening (such as a garment or bag mouth), and a slider that pulls the two rows of teeth into an interlocking position to close the opening; link A chain that is attached to something (as an object to be lifted or dropped) to tighten, stabilize or guide it.
2. The composition of the zipper
The zipper is composed of chain teeth, sliders, upper and lower stops (front and rear) or locking pieces. The fastener element is the key part, which directly determines the side pull strength of the zipper. Generally, the zipper has two pieces of chain belt, each chain belt has a row of fastener elements, and the two rows of fastener elements are arranged in a staggered manner. The fasteners on both sides are clamped by the slider, and the fasteners on both sides can be engaged or disengaged by sliding with the help of the pull tab.
