Patent ID: 8177042

Claim:
A rotary damper comprising: a driven rotation member integrally formed with a rotation portion engagable with a driving member; a fixing and supporting member that holds the driven rotation member rotatably; an accommodation portion that is defined between the fixing and supporting member and the driven rotation member, and a viscous fluid that is stored in the accommodation portion and damps a relative rotation of the driven rotation member and the fixing and supporting member, wherein a center shaft is provided in the center of the fixing and supporting member, a hole into which the center shaft is rotatably inserted is provided in the driven rotation member, a seal member that prevents a leakage of the viscous fluid from a portion between the driven rotation member and the fixing and supporting member is provided, a first path is provided between the center shaft and a surrounding face forming the hole, and a second path that allows a bottom side of the seal member inside the accommodation portion to communicate with the first path is provided in the driven rotation member and extends in a radial direction.