Patent ID: 7793923

Claim:
A wave coil spring comprising: a spring main body which comprises a spiral structure of a wave-shaped spring material, the spring main body bearing an axial compressive load in such a state that surfaces of the spring main body which face each other are brought into contact with each other at a plurality of contact portions, the plurality of contact portions including: a first contact portion formed on a slope of the wave-shaped spring material so as to generate a component of force in accordance with application of the compressive load, the component of force attempting to cause the spring main body to slide in a direction in which the spring main body is wound spirally; and a second contact portion formed on a slope of the wave-shaped spring material so as to generate a component of force in accordance with application of the compressive load, the component of force attempting to cause the spring main body to slide in a direction in which the spring main body is unwound spirally.