| 摘要 |
<p>[Problem] To provide a rotational damper having excellent response and exhibiting a damping effect only in one direction, and a vehicle seat provided with the rotational damper. [Solution] A rotational damper (10) comprising: a casing (13) provided therein with a partition wall section (12) provided with a flow path (11); a rotation body (16) rotatably disposed within the casing and provided with a pair of rotation blades (14, 15) for partitioning the inside of the casing into two chambers (R1, R2) in cooperation with the casing; a viscous fluid (L) contained within the casing; lip seals (17) mounted to the pair of rotation blades in such a manner that, only when the rotation body rotates and moves in one direction, the lip seals (17) expand in the direction perpendicular to the vertical direction to prevent the viscous fluid from flowing between the two chambers; and a lid body (18) for closing the opening of the casing.</p> |
