| 摘要 |
<p>PURPOSE: To make a cassette to be stably arranged at specified position in a holder at the time of cassette insertion in a front loading mechanism. CONSTITUTION: A gear lever 24 for moving the holder energized by a coil spring 62 in the direction of cassette ejection and a 1st gear 27 which is furnished with a 1st tooth lacked part 27d1, 2nd tooth lacked part 27d2 and stopper tooth 27f between both tooth lacked parts, are coaxially provided in the mechanism, and it is constituted of a 2nd gear 28 having a pressurizing pin 28a for operating a switch 61 by engaging with a gear part 24a and relaying gears 35, 36 for transmitting the force driving the gear lever. When the cassette is inserted against the pressing force of the coil spring, the spring is elongated by the amount of a specified moving stroke of the holder in the state the 1st tooth lacked part of the 1st gear is confronted and disengaged with the 2nd gear. On the other hand, the switch is operated with the rotation of the 2nd gear to move the holder in the result the driving force of a motor overcomes the restoring force of the spring. After that, the stopper tooth is engaged or disengaged with the 2nd gear, and finally it becomes the engaged state to move the holder.</p> |
