| 摘要 |
A disk drive unit is provided that is capable of reasonably, smoothly opening/closing a shutter by rotation of an inner rotor. The disk drive unit is configured such that an inner rotor (4) is reasonably, smoothly rotated by sequentially engaging a shutter opening/closing starting projection (72), a rack portion (74), and a shutter opening/closing ending projection (76) of a rack member (71) with a shutter opening/closing starting recess (26), a partial gear (27), and a shutter opening/closing ending recess (28) in the outer periphery of the inner rotor (4). <IMAGE> |
