| 摘要 |
PROBLEM TO BE SOLVED: To prevent the axis misalignment between a turntable and a disk clamper at the time of a disk chucking by providing a conical recessed part at the center axis of either a disk guide or a disk clamper and also providing a projected part having a sphericality to be engaged with the recessed part at the center axis of another part. SOLUTION: When a misaligment is generated between the center axis of a turntable 3 and the center axis of a disk clamper 5 at the time of the disk chucking, the sphericality 12 of a projected part 11 hits on the upper part of the conical recessed part 3c of a turntable 3 and an arm part 14 increases a repulsive elastic force and the part operates so as to move the disk clamper 5 until the center axis of the projected part 11 reaches a position where the conical recessed part 3c is most recessed. Moreover, even in a constitution in which a transparent hole is formed coaxially with the center axis of the disk clamper 5 and a pin-shaped member is putted into the transparent hole and a sphericality is formed at the top end of the member and one end of the member is attached to the clamper 5 with a spring pushing the rear end part of the member, the pin-shaped member similarly operates so as to move the clamper 5.
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