| 摘要 |
<p>PURPOSE:To maintain the aligning state of a track pattern and to obtain a reproducing picture without a noise bar by supporting a drum shaft and a center axis of an annular part on specified points respectively under either coaxial or inclined state of the drum shaft and the center axis. CONSTITUTION:The drum shaft 18 integrally supporting a tape guide drum 10, etc., is supported by a bearing 31 of a bottom surface part 53 of a lead member 12. Consequently, under the normal reproducing or recording mode, the coaxiality of the center axis of the member 12 and the shaft 18 is maintained with high precision, and under a trick play mode, a straight line CL1 to be an inclined turning center axis of the shaft 18 is maintained in a fixed position, and a rotary locus formed by magnetic heads Ha and Hb on a magnetic tape is shown to be of good linearity. Consequently, an FM signal envelope to be reproduced under the trick play becomes flat during a period of each vertical scanning, and hence a good reproducing picture can be obtained without a noise bar.</p> |
