| 摘要 |
The apparatus includes a turntable mounted on a drive spindle which is engageable in the first opening in the hub of the magnetic disc loaded on the turntable. A retractable drive pin is mounted eccentrically on the turntable so as to be sprung into engagement in the second opening in the disc hub upon register. To ensure engagement of the drive pin in the second opening in the disc hub immediately upon loading of the magnetic disc on the turntable, a disc drive motor for driving the turntable via the drive spindle is connected to a supply terminal, a switch control circuit closes the power control switch, for causing the rotation of the turntable relative to the magnetic disc.
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