DAMPER AND VEHICLE SEAT WITH THE DAMPER

摘要

A damper (1) has a container (2), a partition member (6) for dividing the inside of the container (2) into two receiving chambers (4, 5) that receive a viscous fluid (3), rotatable in the direction R together with the container (2), and movable in the axial direction A; movement force application means (7) for providing the partition member (6), when rotation in the direction R1 is inputted, with force for movement of the partition member (6) in the direction A1; elastic means (8) for elastically urging the partition member (6) in the direction A2; a through-hole (9) for interconnecting the two receiving chambers (4, 5) in the container (2); and a permission/limitation member (10) for permitting the viscous fluid (3), which is received in the two receiving chambers (4, 5) in the container (2), to flow between the two receiving chambers (4, 5) through the through-hole (9) and limiting, when an inner pressure exceeding a predetermined level and acting in the direction A1 occurs in the viscous fluid (3) in the receiving chamber (4) due to movement of the partition member (6) in the direction A1, flow of that viscous fluid (3) flowing through the through-hole (9) in the direction A2 into the receiving chamber (5).