| 摘要 |
<p>PURPOSE:To absorb and reduce overload due to abnormal operation at the time of ejecting a cassette and to protect the damage of a driving part by enlarging a clutch effective stroke range which is formed by means of an engage hole provided between first and second racks. CONSTITUTION:A clutch structure has at least one oblong hole 40 which can be shifted nearly horizontally, and is guided by plural guide parts, respectively provided in the first and the second racks 17 and 16, and a gap 44 is formed between the end of the oblong hole 40 and the guide part in a first position where the cassette can be attached and detached. In such a case, the length of the engage hole 25 which is formed in the second rack 16 is set in such a way that the cassette can slide by a distance in which a length that the first rack 17 can slide at least an area equivalent to a cassette horizontal shift distance and a length of the gap 44 formed between the first oblong hole and one of the guide parts are added. Thus, the damage of the device can be prevented in all the areas where the cassette horizontally shifts at the time of ejecting the cassette even if any impulsive force by a user operates.</p> |
