| 摘要 |
PURPOSE:To attain excellent recording/reproduction by providing a shutter opening/closing in common the 1st and 2nd openings in interlocking with the loading/unloading to/from a driver so as to prevent the invasion of dust/dirt into a cassette. CONSTITUTION:A cassette 1 is loaded from the tip shown in arrow C to a disk driver and the shutter 8 is displaced to a position in the arrow A shown in full lines by the operation of a shutter closing mechanism at the driver side. Each of opertures 8a, 8b of the shutter 8 is matched to a head window 5 and a center hole 6 at the said position to open the window 5 and the hole 6. On the other hand, when the cassette 1 is taken out of the driver, the restriction to the shutter 8 is lost and the shutter 8 is moved up to a position in the arrow B shown in double dotted chain lines. Then the positions of the operatures 8a, 8b are parted from the window 5 and the hole 6 which are closed both by the shutter 8.
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