| 摘要 |
PURPOSE:To obtain a shutter mechanism with a small-sized and simplified structure, by combing <=2 shutter plates supported in cases in such a way that they are slidable in the same direction while crossing a window for the rotation driving and recording and reproduction of a disk. CONSTITUTION:A shutter plate 4 floats by downward projections 10a-10d at four corners at prescribed height from an upper case body 2 and is guided by collar edges 5a and 5b of an upper cover body 5 to slide laterally. The other shutter plate 3 is positioned between the shutter plate 4 and upper case body 2 and is guided by the collar edges 5a and 5b to slide laterally. In notch grooves 9a and 9b of the shutter plate 3, projections 10a and 10b on the left-hand side of the shutter plate 4 are engaged loosely, and the shutter plate 4 stops where the upper cover body 5 engage the right end part of a pressing plate 11a. When the shutter plate 3 is moved to right, and right end part of the shutter plate 3 engages with projections 10c and 10b and the shutter plate 4 also moves to right. |
