| 摘要 |
<p>PURPOSE:To detect a mode with high reliability by providing a noncontact system detection means for detecting a loading state in the driving path of a loading mechanism. CONSTITUTION:A magnet 14 for generating magnetic field and a Hall element 15 for detecting the magnetic flux of the magnet 14 without contacting with the magnet 14 are provided in a pulley 5 provided with a gear in a loading mechanism driving system consisting of a loading motor 2, etc. The loading of a tape is started when unloading is completed, that means, the actuating state of a detection switch 13 becomes a reference state. Meanwhile the element 15 outputs once per one rotation of the pulley 5. Since the relative position of the loading mechanism is discriminated by counting the output by a system controller(microcomputer) 18 after shaping the waveform thereof, the mode of a device is detected with high reliability.</p> |
