| 摘要 |
<p>A disc cartridge holding a flexible magnetic disc with a recording capacity exceeding 100 MB. The disc cartridge includes a main cartridge body portion holding a disc-shaped recording medium of an increased capacity, first and second positioning reference holes formed at left and right corners in the lower surface of the main cartridge body portion encircled by the front wall section in the direction of insertion of the main cartridge body portion into a disc drive device, left and right sidewall sections extending perpendicular to the front wall section and the outer rim of the disc-shaped recording medium housed in the main cartridge body portion. The disc cartridge includes a first capacity discriminating hole and a mistaken recording inhibiting unit provided at left and right corners encircled by the back side wall section of the main cartridge body portion, left and right sidewall sections extending perpendicular to the back side wall section and the outer rim of the disc-shaped recording medium housed in the main cartridge body portion and a second capacity discriminating hole towards the outer rim of the disc-shaped recording medium housed in the main cartridge body portion in proximity to the first positioning reference hole. The portions detected by the detection switches are arranged distributed on the lower surface of the main cartridge body portion in order to detect reliably the state of the disc cartridges such as the sorts of the magnetic discs. <IMAGE></p> |
