| 摘要 |
<p>PURPOSE:To realize a stable cassette loading state by preventing the movement of a cassette holder in the ejecting direction via a lock means even in case the engagement is released between a worm having the reaction absorbing effect and a worm wheel. CONSTITUTION:When a cassette holder is loaded, this holder moves horizontally in its loading direction with the horizontal movement of a guide pin 4b. Then the cassette holder moves vertically to load a cassette when the guide pins 4a and 4b reach the bending parts of the guide grooves 20a and 20b respectively. A gear 36 and an intermediate plate gear 44 turn clockwise in one body via a drive motor while the cassette is loaded. The toothless part of a worm wheel is set opposite to a worm as soon as the position control is applied to an interlocking pin 42. Thus the driving force of a motor is not transmitted and the cassette loading action is through. In this case, the movement of the cassette holder is prevented in the ejecting direction since the revolving force of the gear 36 is not applied via the pin 42 even though the gear 44 tries to turn counterclockwise.</p> |
