| 摘要 |
<p>PURPOSE:To provide a back tension less in the change of start and end of winding, by applying a rotating torque which changes at the same rate as the winding diameter of a tape to a supply reel, through a winding reel disc as a drive source. CONSTITUTION:An idler 20 is in rolling contact wit a motor pulley 19 together with a winding reel disc 6, and a reel motor 18 drives the winding reel disc 6 at a low speed of the degree that a tape 23 driven at the rated speed with a capstan 24 and a pinch roller 25 is wound. Thus, the disc 6 is turned counterclockwise at recording/reproduction and a supply reel disc 1 is also turned to the same direction with the tape 23, and a rotating disc 14 opposing to the supply reel disc 1 with a magnetic gap under the disc 1 is reversed. Eddy current is generated on an eddy current disc 4 with the magnetic flux of a magnet 17 and a rotating torque is exerted on the disc 1 clockwise.</p> |
