What are the advantages of the extension spring?

　　Tension spring (also known as tension spring, referred to as tension spring) is a spiral spring that bears axial tension. Generally, tension spring is made of circular section material. In the case of no load, the tension spring is generally tight without clearance between the rings.

　　The working principle of the tension spring is just opposite to that of the compression spring. The compression spring has a reverse effect when there is pressure, while the tension spring has a reverse effect when it is stretched. When the tension spring is pulled apart, the spring wants to pull back, which creates a force.

　　Tension spring can absorb and store energy. The difference between tension spring and compression spring is that under certain tension or without tension, the initial state determines the tightness of tension spring. In this way, the initial force can be controlled to meet the demand of non conditional.