| 摘要 |
<p>PURPOSE:To simplify the constitution of a tape driving device and miniaturize the device by using a transmission roller for both transmitting turning force to its reel board and stopping the travelling of a tape. CONSTITUTION:When the travelling of tape 2 is suspended by the end of tape 2 or troubles generated during tape travelling, the rotation load of driving shaft 7 is sharply increased and motor 5 generates extensive turning force. As the result, more extensive force tries to rewind the tape in spite of suspension of the travelling of tape 2. Transmission roller 9 makes take-up reel board 1 rotate against the energizing force of spring 21, rotates around driving shaft 7 and moves to the 2nd position 9 shown by the two-dot chain lines. The movement is detected by holding part 13 and switch 25 is changed, so that motor 5 is stopped by the operation of electric circuit 27.</p> |
