| 摘要 |
<p>PURPOSE:To reduce the number of components and to improve operability by setting a ratio of the reduction ratio of a supply side gear train to that of a take-up side gear train equal to the ratio of torque required for tape winding in a reproduction mode to that in a reverse reproduction mode. CONSTITUTION:At the time of reproduction, a tape 31 is taken up on a reel 35 by rotating an output pulley 26 in a counterclockwise direction, and driving the take-up side A gear train via a driving pulley 21, a driving gear 25, and a rocking arm 13. Meanwhile, at the time of reverse reproduction, the tape 31 is taken up on a reel 34 by rotating a pulley 26 in a clockwise direction, and driving the supply side B gear train by turning an arm 13 in the clockwise direction. And in the reproduction and reverse reproduction modes, a difference is generated in tape tension. Therefore, the ratio of the reduction ratio by the A side gear train to that by the B side gear train is set equal to the ratio of the torque required for the winding of the tape in the reproduction mode to that in the reverse reproduction mode. In such a way, it is possible to make a clutch mechanism at every reel board unnecessary, and to improve assembling work by reducing the number of components.</p> |
