| 摘要 |
<p>PURPOSE:To prevent the production of malfunction, by controlling the power application time of a solenoid according to the rotary angle of drive gear itself, by detecting the rotary angle through photoelectric means, and providing a photodetection panel turned incorporatedly with a drive gear. CONSTITUTION:A drive gear 6 is driven and reduced with a flywheel gear 3, and it is the drive source for operating mode switching, and a slide bar 7 is slided toward the arrow B with the rotation of the drive gear 6 and moved to the playback position. At the back of the drive gear 6, a photodetection panel 24 is stuck which has a reflection section 25 and a black section 26, and a light emitting diode 27 and a photodetector 28 are provided opposingly. When a solenoid 23 is energized to select the respective operation mode, the rotary angle of the drive gear 6 is detected with the output signal caused in the photodetector 28 and power is applied to the solenoid 23 for the time corresponding to the rotary angle of the drive gear 6.</p> |
