Patent ID: 6826771
Filing Date: 2004-11-30
Classification: G11B

Abstract:
A disk holding device comprising:a turntable which is provided rotatably by a driving mechanism; a center hub operable to engage with an internal diameter of a disk provided on said turntable; plural claw-shaped members contained in said center hub; elastic members operable to energize said plural claw-shaped members in the direction of the radius of the disk; a centering ring operable to adjust a center position of the disk, said centering ring being positioned beneath said center hub and being movable in a direction normal to the disk surface; an elastic member operable to energize said centering ring in the direction normal to the disk surface; and an inclined portion provided in said centering ring, said inclined portion being operable to engage with the internal diameter of the disk; wherein when the disk is not placed on said turntable, sliding of said claw-shaped members in the external disk diameter direction is restricted by engaging a part of each of said claw-shaped members with a corresponding part of said center hub, and wherein said inclined portion is positioned on the periphery of said center hub and is operable to engage with the internal diameter of the disk before a cylindrical portion of the internal diameter of the disk gets over the claw-shaped members.