| 摘要 |
<p>PURPOSE:To make a driving source which is exclusively used for locking a cassette holder and releasing the holder from a locked state unnecessary by installing a lock arm which can engage a lock plate with another lock plate to a link supporting the cassette holder in a projecting state. CONSTITUTION:When a cassette holder 3 is pushed down, a link 4 supporting the holder 3 throws down and a lock arm 6 is engaged with the hook section 52 of a lock plate 5 while the arm 6 pushes the descending lock plate 5 toward a head cylinder 11 and as a result, the holder 3 is tied to its descending position. When a sub-chassis 2 advances, the lock plate 5 hits the releasing piece 7 of a main chassis 1, but the rotation is prevented by a stopper 54 and gets over the releasing piece 7 by pushing the piece 7 away. When the mode is switched to the eject mode, the sub-chassis 2 retreats. While the sub-chassis 2 retreats, the lock plate 5 hits the releasing piece 7 and rotates and the engagement of the lock plate 5 with the lock arm 6 is released. As a result, the cassette holder 3 is lifted up by the force of a spring. Therefore, a special driving source which is exclusively used for locking the holder 3 and releasing the holder from a locked state becomes unnecessary.</p> |
