| 摘要 |
PROBLEM TO BE SOLVED: To provide a disc spring advantageous in enhancing durability while securing a large amount of a stroke in use, also advantageous in enlarging an extent of use.SOLUTION: A disc spring 10 includes a body board 14 of a circular board shape in which a hole 12 is formed at its center. The body board 14 has an inside surface 14A directed toward the inside, and an outside surface 14B directed toward the outside. The inner circumferential part of the inside surface 14A has a first thick part 16A installed thereat that protrudes from the inside surface 14A while making the inner circumferential part thick. At the outer circumferential part of the inside surface 14A, a second thick part 16B is formed that projects from the inside surface 14A so as to make the outer circumferential part thick. |
