| 摘要 |
PURPOSE:To position the center of a disk at the center of a turntable very accurately and surely at all times by increasing energizing force that shifts and energizes the disk in the direction to go away from the center of the turntable proportionally to load torque applied to the disk. CONSTITUTION:A driving pin 32 is pushed by load torque applied to the disk at a side 5a of front side in the direction of rotation of a driving pin insertion hole 5. The driving pin 32 is shifted gradually in the direction of receding from a center pin 31 of the turnable 30 while being shifted to rear side of direction of rotation of the turntable 30 resisting a spring 46. The driving pin 32 is thrusted strongly against outer peripheral side 5b of the driving pin insertion hole 5. Consequently, a center disk 3 is shifted and energized in the direction of receding from the center pin 31 of the turntable 30, and the center of the disk 1 is positioned at the center of turntable 30. The center disk 3 is welded into one body with the turntable 30, and the disk 1 unified with the turntable 30 and rotated in the direction of the arrow mark (b).
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