| 摘要 |
PROBLEM TO BE SOLVED: To surely attract/hold a disk onto a turntable by providing magnetic material transmitting magnetic flux of a magnet of a motor through between the magnet of the motor rotation driving the turntable and a clamping plate provided on the disk. SOLUTION: The coil 1114 of the motor 1030 is arranged oppositely to the magnet 1113 stuck to the turntable 1028 to be fixed to a pedestal 1021. The magnetic flux 1130 is generated from an end part 1128 of a yoke 1126 stuck to the magnet 1113 and a projected part 1129, and the clamping plate 1042 consisting of the magnetic material is attracted, and the disk 1023 is fixed to the turntable 1028. Since the pedestal 121 is constituted of the magnetic material, though the force so that the turntable 1028 is attracted in the direction of the pedestal 1021 occurs by the magnetic flux of the magnet 1113, a spring 1020 thrusts up a support shaft 1002 upward against the attracting force, and thus, keeps a gap between the magnet 1113 and the coil 1114.
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