| 摘要 |
<p>PURPOSE:To prevent the wound-out in advance, by mechanically sensing and detecting the change in the revolution of the winding reel to the revolution of the supply reel caused by the wound out phenomenon of magnetic tape quickly. CONSTITUTION:When the magnetic tape 8 is moved to the forward direction, if the magnetic tape, for example, 8 is wound up on the capstan 10, the supply reel feeds still the magnetic tape 8. Since the winding reel is turned reverse with the wound-out,the part in contact with the winding reel for the shaking plate 3 is moved toward the dotted line arrow by taking the moving point which is moved with the normal revolution of the supply reel as a fulcrum. Thus, the operating plate 4 linked with the shaking plate 3 via the link pin 7 is moved to the arrow in dotted lines to turn off SW1 and to stop the entire unit. Then, the wound-out of the magnetic tape 8 can be prevented.</p> |
