Optical disk drive and recording and reproducing apparatus with magnetic clamping
AssigneeSony Corporation
InventorYoshitaka Aoki
Life of this patent
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Abstract
An optical disk drive having a turntable for carrying an optical disk with a clamping plate made of a magnetic material having a clamping area. A magnet is included for attracting to a turntable side the clamping plate of the optical disk placed on the turntable in a noncontact state. A motor is included for rotating the turntable with the optical disk placed thereon, wherein an attraction force of the magnet attracting the clamping plate is a value by which bending of the optical disk accompanied with the attraction of the clamping plate becomes within a permissible error range. A recording and reproducing apparatus may also incorporate the optical disk drive.
Claims8
A recording and reproducing apparatus comprising:
- a turntable configured to carry an optical disk with a clamping plate made of a magnetic material attached in a vicinity of a clamping area thereon;
- a magnet configured to attract said clamping plate of said optical disk placed on said turntable to a turntable side in a noncontact state;
- a motor configured to rotate said turntable with said optical disk placed thereon;
- and
- a recording and reproducing unit configured to record the information with respect to the rotating optical disk or reproduce the recorded information from the rotating optical disk, wherein
- the attraction force of said magnet attracting said clamping plate is a value by which bending of said optical disk accompanied with the attraction of said clamping plate becomes within a permissible error range, and
- said attraction force has a value by which said optical disk does not detach from the top of said turntable when said optical disk is rotated by about 60 degrees for about 0.25 second around a vertical axis vertical to the rotation axis of the rotation of said optical disk by said motor.
Dependencies are inferred from the claim text.