| 摘要 |
<p>A disc cartridge includes a shutter member (34) movably supported by a cartridge main body (31) accommodating a disc (2) and provided with an aperture (41) to expose a part of the major surface to outside between the inner periphery and the outer periphery of the disc, and a holding member (18) having its proximal end rotatably supported within the cartridge main body (31) to hold the shutter member (34) in a position of closing the aperture (41). The shutter member includes a plate portion (37) to open and close the aperture (41) of the cartridge main body (31), a mating engaging portion (39) engaged by a part of a free end (19) of the holding member (18), an inserting portion (38) to be inserted into a shutter opening groove (17) provided in a lateral side of the cartridge main body (31) and a connecting portion (35) to connect the plate portion (37) and the inserting portion (38) to each other. The plate portions (37), the mating engaging portion (39), the inserting portion (38) and the connecting portion (35) are formed integrally from a metal material or a synthetic material. When the shutter member is moved to a position closing the aperture (41) in the cartridge main body (31), the mating engaging portion (39) of the shutter member is engaged with and maintained by the free end (19) of the holding member (18) to maintain the aperture (41) in the closed state. When the disc cartridge is loaded in position in disc recording and/or reproducing apparatus, a shutter opening member provided in the disc recording and/or reproducing apparatus intrudes into the shutter opening groove (17) of the cartridge main body to rotate the holding member (18) to disengage the mating engaging portion (39) of the shutter member (34) from the holding member (18) and simultaneously move the shutter member (34) in the direction to open the shutter member (34). <IMAGE></p> |
