Patent ID: 7657902

Claim:
A disk holding device comprising: a plurality of disk holding members to be inserted into a center hole of a disk-formed recording medium and be moved from the inner periphery side toward the outer periphery side of said disk-formed recording medium when inserted in said center hole; and a disk receiving part for receiving a part, on the outer side of said center hole, of an inner peripheral part of said disk-formed recording medium, wherein said disk holding members are each provided with a holding projection part projected from the inner periphery side toward the outer periphery side of said disk-formed recording medium; said holding projection part is provided with an inclined surface displaced so as to be spaced away from said disk-formed recording medium as one goes from the inner periphery side toward the outer periphery side of said disk-formed recording medium in the condition where said disk holding members are inserted in said center hole; and when said disk holding members are moved from the inner periphery side toward the outer periphery side of said disk-formed recording medium, said inclined surfaces of said holding projection parts make sliding contact with an aperture edge of said center hole to move said disk-formed recording medium in the direction of approaching said disk receiving part, whereby said disk-formed recording medium is held in the state of being clamped between said disk receiving part and said plurality of holding projection parts.