| 摘要 |
A rotary damper D includes a housing 11; a viscous fluid 21 filled in the housing 11; a rotor 31 disposed inside the housing 11 and having a shaft part 32 partially protruding from the housing 11 and resistance parts 36 provided on the shaft part 32 for moving in the viscous fluid 21 inside the housing 11; and a seal member 71 for sealing between the shaft part 32 and the housing 11 to prevent leakage of the viscous fluid 21, the resistance part 36 comprises a flat pate 37 extending radially from the shaft part 32, and an arc-shaped plate 38 attached to the flat plate 37. The arc-shaped plate 38 includes a first sloping part 39A provided on an upstream side of the rotating resistance part 36 and having a distance relative to an inner surface 14a of the housing 11 gradually decreasing toward a downstream side; and a second sloping part 39B provided on a downstream side of the rotating resistance part 36 and having a distance relative to the inner surface 14a of the housing 11 gradually increasing toward a downstream side.
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