| 摘要 |
<p>PURPOSE:To obtain a switching system of simple constitution by providing a selective means for selecting the traveling direction of both the constant speed travelling and the high speed travelling of a tape. CONSTITUTION:When a tape 120 is made to travel at a constant speed in the direction as indicated with an arrow 240 from its stop state by means of the operating button, the motor 28 rotates in the direction as indicated with an arrow 164, this rotation is transmitted to the pulley 156, and also it is transmitted to the triangle cam 172 through the gear 158 by the one-way clutch 162. The cam follower 184 is driven by rotation of the triangle cam 172 and is displaced in the direction as indicated with an arrow 246, by which the shaft 198 moves along the cam surface 190a, and rotates and displaces the switching plate 190. Displacement of the switching plate 190 is transmitted to the selective plate 138 through the selective plate 144 and the lever 148. When the triangle cam 172 rotates by 180 deg. from the position shown in the figure, the selective plate 144 slides in the direction as indicated with an arrow 240, is displaced, contacts with the gear arm 96, and the selective plate 138 slides in the direction as indicated with an arrow 242, and is displaced.</p> |
