| 摘要 |
<p>PURPOSE:To adjust and control the noise of a rotary head device and the jitter of a reproducing signal generated at a part where a magnetic head starts and completes to abut with a magnetic tape so as to reduce fitting in every specification and every solid of a VTR. CONSTITUTION:A protrusive part 11 capable of performing fine adjustment is mounted on a specific part on the outer peripheral cylindrical plane 1a of a fixed drum 1 via a protrusive member 10 or an actuator. The vibration of the magnetic tape 5 can be minimized by performing the fine adjustment of the position of the protrusive part 11 in a circumferential direction at a part where the magnetic head starts or completes to come into contact with the magnetic tape 5, and the protrusive quantity of the protrusive part 11 can be controlled corresponding to the operating mode of the VTR.</p> |
