| 摘要 |
PURPOSE:To certainly obtain a prescribed torsion characteristic by fixing a side plate for supporting a spring onto a piston having a high strength on the outer peripheral part. CONSTITUTION:A side plate 13 for supporting a spring 38 is fixed onto a piston 10 having a high strength on the outer peripheral part 33. Therefore, the deformation and breakage of the side plate 13 can be prevented, and a prescribed torsion characteristic can be obtained certainly by supporting the spring 38 in the stable state. |
