| 摘要 |
<p>Disk cartridge (1) having a shutter (9) that slides only on one side of a cartridge (5) to open or close the openings (7) and (8) where there are disposed pick-up devices (44) that are located on the upper and lower surfaces of the cartridge (5) to read or rewrite signals, the cartridge (5) holding a disk (6) which can record data signals on both sides thereof, such as an optical disk. The invention further relates to a device for opening and closing the shutter of the cartridge (1) in which a pair of shutter opening/closing arms (51) and (52) are disposed facing the direction for inserting the disk cartridge (1), in order to open or close the shutter (9) of the disk cartridge (1). A protuberance (57) or (58) is brought into engagement with an engaging hole (29) of the shutter (9), whereby the arm (51) or (52) is turned as the cartridge (1) is inserted, and the shutter (9) slides to open the openings (7) and (8). When the disk cartridge (1) is improperly inserted, the protuberance (57) or (58) is not engaged with the engaging hole (29), whereby the disk cartridge that is improperly inserted is detected.</p> |
