| 摘要 |
<p>PURPOSE:To reduce the troublesome operation for erroneous operation by detecting erroneous insertion of a recording/reproducing medium and driving an eject motor with the detection output. CONSTITUTION:If another pack is erroneously inserted, the optical path of the first light emitting element 4 is intercepted, and photodetector 5 and 7 output low-level signals together momently. When outputs of the first and second photodetectors 5 and 7 are inverted by inverters 11 and 12 to input high level signals to an AND circuit 13, a high-level signal is inputted to a terminal CK of a flip flop 18 after a prescribed time. At this time, the high level is held in a terminal the inverse of Q, and a witching transistor 20 is turned on to drive an eject motor 21. When an eject completion switch 16 is depressed, a high-level signal is inputted to a terminal CL, and the terminal the inverse of Q goes to the low level, and the eject motor 21 is stopped, and consequently, the pack loaded till then is ejected.</p> |
