| 摘要 |
PURPOSE:To attain the centering with accuracy by forming a face at the downstream in the drive direction of a throughhole of a drive pin delivering a torque to a disk in a shape opened at the peripheral side of a turntable and supporting the drive pin with the support member freely movably in the radial direction of the turntable. CONSTITUTION:When the disk cartridge 24 descends toward the turntable 3 and reaches the load position, the lower face of a metallic hub 35 contacts the tip 19a of the pin 19 and when a rigid body is used for the support member 31, only a part of the hub 25 contacts the turntable 3, while a part of a tip 2a of a spindle shaft 2 is inserted to the chucking hole 23, only the turntable 3 is driven in the arrow A. The drive pin 19 is inserted into a hole 27 at a position where the drive pin 19 and the hole 27 are coincident, the entire face of the hub 25 is adsorbed to the turntable 3 to complete the loading. In driving the turntable 3 further, the drive pin 19 is pushed by a slope face 32 of the hole 13 to push the inner face 27a of the peripheral side of the hole 27 in a direction of arrow D to complete the centering.
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