A spring is a mechanical component that works by utilizing elasticity. Parts made of elastic materials deform under external force and return to their original state after the external force is removed. Also known as ‘spring’. Generally made of spring steel. There are many complex and diverse types of springs, mainly classified by shape, including coil springs, torsion springs, leaf springs, etc.

Compressed springs (also known as pressure springs) are helical springs that bear axial loads. The cross-section of the materials used is mostly circular, but there are also rectangular and multi-strand steel versions. Springs are generally of uniform pitch, and the shapes of compressed springs include cylindrical, conical, convex, and concave, as well as a small number of non-circular shapes. There is a certain gap between the coils of a compressed spring, which allows it to contract and deform when subjected to external loads, storing deformation energy. The products have a wide range of applications in electronics, motors, computers, information technology, automobiles, bicycles, hardware tools, gifts, toys, and even the defense industry, because their design and principle are easy to grasp, and the manufacturing control is relatively simple.