| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical disk device in which an optical head can be accurately moved by suppressing backlash without increasing the parts cost of the optical disk device and the manufacturing cost thereof. SOLUTION: The optical disk device is provided with a drive gear 50, a first rack 110 fixed to an optical head, and a second rack 120 movable relatively to the first rack. Drive of the optical head is performed in a double rack region in which both of the first rack and the second rack engage with the drive gear, elevation etc. of a turn table 32 is performed in a single rack region in which only the second rack engages with the drive gear. In the single rack region, when the second rack is in the prescribed region, the second rack moves the optical head through the first rack. When this rack unit is engaged with the drive gear in the prescribed region, a cam 112 of the first rack energizes the second rack to a drive gear side, so that backlash between the second rack and the drive gear is removed. COPYRIGHT: (C)2006,JPO&NCIPI
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