| 摘要 |
<p>PROBLEM TO BE SOLVED: To simplify a cassette loading mechanism and a cassette extruding mechanism by stopping a main rack by stopping a first rack until the opening and closing operation of the lid of a main holder becomes possible for a cassette when the cassette is loaded on the main holder. SOLUTION: When a cassette 30 is pushed in, an outer rack 17 begins to move, and the driving gear 27 meshed with the outer rack 17 begins to rotate. At this time, since a projecting part 16 is abutted on the outer peripheral part 28 of the driving gear 27, an inner rack (a first rack) 12 can not operate in the inserting direction of the cassette. Thus, the main holder 1 engaged with the inner rack 12 also can not operate in the direction of the cassette. The cassette 30 is further pushed in up to the cassette-in position where the opening and closing operation of the lid for the cassette is possible, whereby the driving gear 27 is rotated, the notched part 29 of the driving gear 27 coincides with the projecting part 16 of the inner rack 12, the inner rack 12 is also meshed with the driving gear 27 and the main holder 1 is also allowed to operate.</p> |
