| 摘要 |
<p>PURPOSE:To prevent damages of a gear, etc., constituting a power transmission mechanism by moving a cassette holding means between a cassette inserting/ detaching position and an attaching position inside a device main body by a power transmission mechanism. CONSTITUTION:A worm wheel 12 is provided on a worm wheel shaft 9 freely rotatably and capable of moving in a thrust direction, pressed upward by a compression spring 72 via washers 70 and engaged with the gear 10. Then, when a tray pulled out of the device main body is strongly pushed and when the tray is suddenly pulled in a disposing direction and impactly stopped touching a stopper, the worm wheel 12 is rotated integrally with a motor 18 following it. Then, the worm wheel 12 is moved downward, the gear 10b of the right can gear 10 and the gear 12b of the worm wheel 12 are disengaged and the right side can gear 10 is rotated alone.</p> |
