| 摘要 |
<p>PURPOSE:To simplify the slide mechanism of a switch plate used for the forward/reverse mechanism of a switch gear by using a rotary driver which is directly driven to give the forward/reverse revolutions to the switch gear and the horizontal slides to the switch plate respectively. CONSTITUTION:When rotary drives 1 and 2 are revolved in a single direction, a transmission gear 19 of a large diameter engaging a drive gear is revolved in the prescribed direction. Thus a reel shaft at one side is revolved and a tape running at a fixed speed is taken up by a capstan set at one side and a pinch roller. When the tape is taken up to its terminal, a detecting device works and drives 1 and 2 are revolved in the opposite direction. Thus the gear 19 is also reverses. Thus an oscillating arm 30 has oscillations in the opposite direction and also oscillates a reverse plate 56. Thus a projected bar 58 of the plate 56 pushes a projection 38. As a result, a switch gear 34 engages a transmission gear of a small diameter and the gear 34 is revolved. Then the reverse plate slides to press the pinch rollers 52 and 53 set at the opposite side to the capstan. Then the pinch rollers pressed to the capstan are separated. In such a way, the tape is driven in the opposite direction at a fixed speed for execution of the reverse reproduction.</p> |
