Patent ID: 8099741

Claim:
A disk drive to be loaded with a disk cartridge that houses a disk therein, the drive comprising: a cartridge holder for holding the disk cartridge, the holder having a holder opening, through which the disk cartridge is inserted from outside of the drive into the cartridge holder and ejected out of the cartridge holder; a pair of guide walls, which is arranged in the vicinity of the holder opening of the cartridge holder to define a direction in which the disk cartridge is supposed to be inserted; a disk motor for rotating the disk that has been mounted thereon; a head for reading and/or writing information from/on the disk; a base for supporting the head and the disk motor thereon; a first opening/closing lever, which has a first engaging portion that engages with a portion of the disk cartridge and which rotates while the disk cartridge is being inserted or ejected; and a second opening/closing lever, which has a second engaging portion that engages with another portion of the disk cartridge and which rotates while the disk cartridge is being inserted or ejected, wherein the first and second opening/closing levers rotate and get engaged with the disk cartridge so as to leave a narrower gap between the first and second engaging portions than between the guide walls when the disk cartridge is being inserted but to leave a broader gap between the first and second engaging portions than between the guide walls when the drive gets loaded with the disk cartridge, thereby opening a window in the disk cartridge so as to allow the head to access the disk and also allow the disk motor to mount the disk.