Patent ID: 6840355

Claim:
A rotary damper device comprises: a case in which a viscous fluid is filled and sealed; a rotation shaft relatively rotatably supported by the case; a rotation vane formed protruded from the rotation shaft, a check valve mounted on a tip part of the rotation vane, wherein a passage where the viscous fluid passes through is formed in the rotation vane, the check valve is provided with an opposing face part facing the passage and a frame body interposed in the rotation vane; and an elastic member for energizing the opposing face part of the check valve for closing the passage of the rotation vane is formed in either the rotation vane or the opposite side of the frame body of the opposing face part, wherein the check valve is provided with the elastic member integrally formed at the frame body opposite the opposing face part so as to abut the rotation vane, and wherein a regulating part is formed between the rotation vane and the opposite side of the frame body to the opposing face part for restricting elastic deformation of the elastic member.