| 摘要 |
A damper device is provided to stably maintain braking force over a long period of time by applying braking force to movement of a piston body by transferring a shaft pat having a valve shape inserted into a through hole formed in a cylinder body. A damper device comprises a cylinder body(1) and a piston body(2). A braking object is attached on at least one of the cylinder body and the piston body, so that braking force is applied to movement of the braking object. A through hole(14d) is formed in an inner wall(14) of the cylinder body disposed opposite the piston body. A valve shape body(4) is provided with a shaft part(40) inserted into the through hole to form a gap between the shaft part and the through hole passing fluid. A length inserted into the through hole is changed by pressure variation caused by movement of the piston body. |
