Compression spring is the more common form of life.
It is to bear the pressure of the coil spring, it mostly with a circular cross section of material is also useful in rectangular and multi-unit Ying rolled steel, the spring is usually so pitch.
Compression spring shape: cylindrical, conical, in the concave and convex and a small amount of non-circular, etc., compression spring ring with a certain gap between the circle, when the spring when subjected to external load deformation, storage deformation energy.
