| 摘要 |
<p>PURPOSE:To avoid the production of noise bar by regulating the recording tracks of a magnetic tape and the rotation track surface of a rotary magnetic head so as to agree with each other and, further inclining the drum shaft and the center axis of a lower drum. CONSTITUTION:In a normal reproducing mode, if a magnetic tape T runs at a required speed while the reference edge Te of the tape T is being guided by the lead 16 of a lead ring LR, the rotation tracks of magnetic heads Ha and Hb agree approximately with track patterns recorded on the tape T. In order to change a reproduction mode from the normal mode to an FF mode, a motor is driven and geared screws 4 and 5 are made to protrude upward from the middle positions in accordance with the speed multiplying number for fast feed. If the screw 4 is made to protrude, the tip of the screw 4 is pressed against the bottom of a lower drum Dd and a drum shaft 3 is turned around a straight line L4. If the screw 5 is made to protrude, the lead ring LR is turned around a straight line L3. With this constitution, even in the case of the FF reproduction or FB reproduction at a high multiplied speed, an excellent reproduced picture can be obtained.</p> |
