| 摘要 |
<p>PURPOSE:To obtain stable and high-grade pictures in a special reproduction mode such as the slow motion reproduction, the still reproduction, etc., by actuating a loading pole with a lead mechanism of a screw drive type, etc. CONSTITUTION:A move-back nut part 20 of a pole base drive mechanism 18 which loads and unloads a magnetic tape is screwed to a pair of guide shafts 11 and 11 containing a screw part 11a and has a linear shift at both sides of a guide drum 10. As a result, the installing space is reduced for a tape loading drive mechanism and the structure of a tape loading device is simplified. Furthermore, a base plate 19 can be stopped easily by a lead mechanism consisting of the shafts 11 and a mobile nut part 20 when it is desired that a loading pole is stopped at a middle position before the loading end position in a special reproduction mode like the slow motion reproduction, the still reproduction, etc. Thus it is possible to obtain the stable and high-grade pictures.</p> |
