| 摘要 |
PURPOSE: To provide a rotary damper which is not given any damage even though excessive rotary force is further given to a moving body in the maximum rotation-limit position. CONSTITUTION: The rotary damper comprises a cylinder member(3) having a wall(8) along a radius line on an inner periphery of a cylinder chamber(2) filled by viscous fluid, and a rotor member(4) having a vane(7) moving along the inner periphery of the cylinder chamber. Rotary resisting force caused by the viscous fluid is given to a space between the cylinder member and the rotor member in the rotary damper. Greater rotary resisting force is further generated in the rotary damper, and a torque cancel means 5 capable of idling is arranged on an axial end of the cylinder member or the rotor member when relative rotation between the cylinder member and the rotor member is limited. When rotary force is further increased at a rotation-limit position of the rotary damper, transmission of excessive torque to the cylinder member or the rotor member is shut off by actions of the torque cancel means.
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