Patent ID: 6160780
Filing Date: 2000-12-12
Classification: G11B

Abstract:
A disc clamper which is used in a disc drive for playing back or recording and playing back a disc to be rotated by means of a turntable which is movable between a raised position and a lowered position, the disc clamper being adapted to be supported rotatably and movably in an up and down direction by a support member with an opening provided above the turntable so as to hold the disc between the disc clamper and the turntable moved to the raised position, the disc clamper comprising:a disc clamper main body including a flange part and a cylindrical part with an upper circumference and a lower outer circumference, the flange part being provided integrally with the upper circumference of the cylindrical part so as to be supported on an upper surface of the support member, the cylindrical part having a substantially cylindrical shape wherein said lower outer circumference has a diameter almost equal to a diameter of the turntable, and the cylindrical part being adapted to be inserted into the opening in the support member;attraction means provided in the disc clamper main body so as to be attracted to the turntable; anda plurality of disc pressing protrusions projecting outward in the radial direction from the lower outer circumference of the cylindrical part of the disc clamper main body.