| 摘要 |
<p>PURPOSE:To keep a cassette holder and a cassette in parallel in all of the operating processes by setting the width of a groove for sliding an arm lever on a driving side larger than that of the groove for sliding the arm lever on a driven side. CONSTITUTION:The center of a driving post 4 on the driving side comes off that of the arm lever 13a by setting the width Wa of the groove 14a for sliding formed on the arm lever 13a on the driving side larger than the width Wb of the groove 14b for sliding formed on the arm lever 13b on the driven side. As a result, it is possible to perform the phase alignment of a driving post 4 on the driving side with the driving post 4 on the driven side by almost conforming the phase delay of the arm lever 13b due to backlash in gears (11a, 18a) and (11b, 18b) in operating to that of the driving post 4 on the driving side. In such a way, the cassette holder and the cassette can be held in parallel in all of the operating processes.</p> |
