Patent ID: 6246539
Filing Date: 2001-06-12
Classification: G11B

Abstract:
A disk chucking mechanism for selectively chucking a first disk and a second disk onto a turntable, the first disk having a first hub which has a chucking hole into which and through which a spindle is inserted and a positioning hole into which and through which a drive pin is inserted, the second disk having a second hub which has a second chucking hole into which and through which a spindle is inserted and a ring-like projection, comprising:a first magnet provided on an inner periphery of the turntable, the first magnet configured so as to attract the first hub and the second hub; anda second magnet provided on an outer periphery of the turntable, the second magnet having an attracting surface positioned further toward the outer periphery of the turntable than an attracting surface of the first magnet and opposite the projection formed on the second hub so as to attract only the second hub.