| 摘要 |
A "child-proof" device incorporated in a record player is comprised of a vertically displaceable arm carrier having a self-positioning means for a pickup arm and to be depressed upon closure of a cabinet lid so that the stylus of a pickup head automatically engages with a starting point of the recorded groove of a record mounted on a turntable. A first switch means is provided which becomes operative upon closure of the lid to close a circuit including an electric motor and a power supply therefor. Second and third switch means become operative to close the circuit only when the pickup arm is positioned correctly by the self-positioning means. Upon termination of the sound reproduction of the entire recorded groove of the record, the pickup head is automatically lifted above and away from the record surface as then the pickup arm slides upwardly on a tapered face means.
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