CARTRIDGE FOR OPTICAL DISK DEVICE

摘要

PURPOSE:To suppress the generation of wear dust of a cartridge case due to the sliding actions of a shutter and to reduce the sliding resistance of the shutter, by forming a rib-shaped projection part on the surface of the cartridge case which is opposite to the shutter. CONSTITUTION:A disk recording medium 5 is stored in a cartridge case 1a and a hub 6 is fixed at the center of the medium 5. A spindle hole 2 and a head inserting hole 3 formed on the upper and rear surface sides of a shutter 7 have such sizes that can be closed. The shutter 7 is supported slidably by the case 1a and slides automatically when it is loaded on an optical disk device. Then both holes 2 and 3 are opened at a time. While small linear rib-shaped projections 8 extending in the sliding direction of the shutter 7 are formed at the upper and lower places of each case.