| 摘要 |
PROBLEM TO BE SOLVED: To provide a disk cartridge which can accurately be positioned to a drive device for accessing a disk medium. SOLUTION: The disk cartridge 10 is provided with a case which rotatably houses a discoid disk medium 20 and has an arcuate side wall at the loading side of the drive device, and a shutter member formed on at least one surface of the case 30 for opening or closing an opening for access to the disk medium. Engaging portions 140, 142 are provided at the side wall to engage with a sensor member disposed in the drive device for accessing the disk medium 20 so as to carry out recording/reproduction of information.
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