| 摘要 |
<p>PURPOSE:To prevent the insertion mistake of a cassette and also to ensure the stable positioning at all times for cassettes of various sizes, by energizing a press-contact plate covering the upper surface of a cassette holder with a spring and pressing the cassette to its loading position. CONSTITUTION:A bottom surface guide groove 48 of a cassette 45 is engaged with a projected guide groove 22, and the cassette 45 is loaded with no vertical gap formed between a bottom plate 17 and a press-contact plate 24. A cassette holder is moved down to the loading position along an L-shaped guide groove 32 via three pairs of right and left rolls 20. In this case, the plate 24 is pulled by a spring 43 to press the cassette 45. The bottom surface 45b of the cassette 45 is engaged selectively on plural positioning pins 49 despite different sizes of cassettes, and the well-balanced positioning is secured for the cassette 45 by means of the plate 24 having a large area. In addition, the vertical size between plates 17 and 24 is also reduced and the thin and simple structure attains the cost reduction.</p> |
