Abstract: A magnetic spring was developed, which consists of two magnetic rings with different dimension, locating concentrically with same direction of magnetization. One of two magnetic rings is fixed and the other can move axially. Because of the function of magnetic field, two magnetic rings keep each other with a due distance axially. If the relative position between two magnetic rings is changed, a rehabitation force, namely, elastic force, is produced. The measurements demonstrated that the relation of elasticity and the displacement is quite linear and the elasticity increases along with the dimension of the magnetic rings.

Key words: Elasticity, Magnetic spring, Spring