| 摘要 |
A disc cartridge apparatus including a cartridge main body wherein a disc having an information bearing surface is rotatably accommodated and which is provided with an opening confronted by an optical pickup for recording or reproducing information signals to or from the disc, a sliding shutter installed in the cartridge main body in capable of sliding between a position where it covers the opening of the cartridge main body an another position where it uncovers the opening, and a plurality of detecting slits defined in right and left symmetry position on the cartridge main body through two sides. <IMAGE> |
