Patent ID: 6983474

Claim:
A disc clamp device for holding a disc by sandwiching it by a turn table and a clamp ( 6 ), the disc clamp device comprising: a clamp arm capable of rotating in a direction moving close to the turn table and a direction moving away from it; a plate spring member ( 5 ), a part of which is fixed to the clamp arm, and which has first tongue pieces ( 5 b , 5 b ′) located under a flange ( 6 b ) of the clamp ( 6 ) for lifting the clamp by the first tongue pieces ( 5 b , 5 b ′) upon an unclamping state and pressing an upper center of the clamp in a direction of the turn table during a clamping state; second tongue pieces ( 4 a , 4 a ′) provided at the clamp arm to press third tongue pieces ( 5 a , 5 a ′) of the plate spring member on both sides of a portion pressing a center projection ( 6 a ) and wherein the plate spring member ( 5 ) is configured so that the plate spring member 5 is pressed against a fixing member ( 8 ) and elastically deformed by the reaction caused by the pressure against the fixing member ( 8 ), upon the unclamping state.