Patent ID: 6507556
Filing Date: 2003-01-14
Classification: G11B

Abstract:
A disc clamping device comprising a disc clamper having a boss for penetrating a center hole of a disc, the edge of the outer periphery of the boss being formed as a first tapered surface for centering the disc, a hung pin provided in the center of the disc clamper, and a clamp support member having a circular hole penetrated by the hung pin, the hung pin having a head greater in diameter than the circular hole so that the disc clamper is supported by the clamp support member, the clamp support member being capable of causing the disc clamper to approach a turntable for clamping the disc between the turntable and the disc clamper while centering the disc with said first tapered surface, wherein:at least one of the portions of the edge of the circular hole and the head of the hung pin to be in engagement with each other is formed as a second tapered surface for centering the disc clamper; and an elastic member is attached to the clamp support member for causing the head to be engaged in the edge of the circular hole through said second tapered surface; whereby said disc clamper is centered with respect to the clamp support member by said second tapered surface for centering the disc clamper in a state thereof spaced apart from the turntable.