Patent ID: 6898795
Filing Date: 2005-05-24
Classification: G11B

Abstract:
1. A disk drive unit for recording and/or reproducing information on and/or from a disk-like recording medium rotatably housed in a disk cartridge including an inner rotor rotatably housed therein and a shutter for opening/closing, from inside, a pickup insertion port by rotation of said inner rotor, said disk drive unit comprising: a rack member having a shutter opening/closing starting projection, a rack portion, and a shutter opening/closing ending projection, which are to be sequentially engaged with a shutter opening/closing starting recess, a partial gear, and a shutter opening/closing ending recess or projection formed in or on the outer periphery of said inner rotor; and driving means for rotating said inner rotor from a shutter opening/closing starting position to a shutter opening/closing ending position by sliding said rack member relative to said disk cartridge; wherein said drive means moves at least one of said rack member and said disk cartridge in such a manner that said shutter opening/closing starting recess and said shutter opening/closing ending recess or projection of said inner rotor are engaged with and released from said shutter opening/closing starting projection and said shutter opening/closing ending projection of said rack member.