Patent ID: 7917919

Claim:
A disc clamping mechanism comprising: a clamp board that rotatably clamps a disc in cooperation with a turntable to be rotated in a housing; a clamp base that rotatably supports the clamp board at a position opposite to the turntable such that the clamp board is movable so as to move away from or come into contact with the turntable; and a first supporting unit configured to come into contact with a first peripheral edge of the clamp board protruding from the clamp base when the clamp board moves away from the disc according to the movement of the clamp base, to exert pushing force in a direction of the turntable and pushing force in a direction of a movement fulcrum of the clamp base against the first peripheral edge wherein the clamp base includes a second supporting unit including a small piece and a pair of flanges provided at both sides of the small piece, wherein the small piece is opposite to a second peripheral edge of the clamp board situated at an opposite side to the first peripheral edge and the pair of flanges has surfaces opposite to the turntable, and when the first peripheral edge is pushed by the first supporting unit, the second peripheral edge gets on the small piece such that both sides of the second peripheral edge come into close contact with the surfaces of the flanges opposite to the turntable, which secures the clamp board.