| 摘要 |
<p>PURPOSE:To move a cassette holder from an insertion and taking-out position to a play position quietly with relaxing the descending speed of the cassette holder by reversing the decelerating unit from the motor of a cam part, which operates an ascending and descending material moving the cassette holder to the taking-out position, through the cam part. CONSTITUTION:The rotation of a motor is decelerated through pinion 12 and idle gear 18 to rotate cam gear 33, and roller 39 is depressed by inclined cam 35 to rotate arm 38 in the left direction, thereby causing cassette holder linked with roller 40 to ascend. Cam 33 is provided with reverse cam part 99 which has an inclined direction opposite to inclined cam 35 and has a rapid inclined angle; and when the rotation of cam gear 33 is broken in the insertion and taking-out position, roller 39 and part 99 are held in an opposition state. When a cassette is inserted and the lock of the lock arm is released, the cassette arm descends rapidly, however, cam gear 33 is rotated because roller 39 strikes the inclined face of reverse cam part 99. Therefore, idle gear 18 is rotated reversely to give a large load to cam gear 33, and the descending speed of the cassette holder to the play position is relaxed.</p> |
