Patent ID: 7159229
Filing Date: 2007-01-02
Classification: G11B

Abstract:
1. A disk cartridge to be inserted into a disk drive apparatus through an insertion opening of the disk drive apparatus upon use, the disk cartridge comprising: a shell with at least an opening portion through which a disk table provided in the disk drive apparatus is inserted; a disk-shaped recording medium rotatably housed in the shell; four positioning holes or four positioning grooves formed on the shell as positioning portions to the disk drive apparatus, said first positioning portion and said second positioning portion are formed at a same position in the X direction; said third positioning portion and said fourth positioning portion are formed at a same position in the X direction but different from the position of said first positioning portion and said second positioning portion; said first positioning portion and said third positioning portion are formed at a same position in the Y direction; said second positioning portion and said fourth positioning portion are formed at a same position in the Y direction but different from the position of said first positioning portion and said third positioning portion; and wherein at least two of said four positioning portions are used in positioning the disk cartridge to the disk drive apparatus at insertion of the disk cartridge into the disk drive apparatus through the insertion opening.