Patent ID: 8608577

Claim:
A damper device comprising: a first rotation member coupled to a power source; a second rotation member coupled to a drive member driven by power generated from the power source and capable of rotating relative to the first rotation member; and a coiled elastic member configured to transmit the power between the first rotation member and the second rotation member, and absorb a torque variation between the first rotation member and the second rotation member, wherein the coiled elastic member has an internal area and an outer area on a cross-sectional shape on a plane including a centerline of the coiled elastic member, the internal area having lower rigidity and lower density than those of the outer area, an internal area of the coiled elastic member on both ends in a direction of the centerline is smaller than an internal area on a central part of the coiled elastic member, and widths of the internal area of the coiled elastic member on both ends in the direction of the centerline are formed to be smaller than a width of the internal area on the central part of the coiled elastic member.