| 摘要 |
PURPOSE:To attain simply and surely the control of high accuracy by providing a loading mechanism, two rack members driving a clamper mechanism and two transmission gear systems giving selectively a driving torque to the two rack members and being formed to be meshed at switching. CONSTITUTION:The forming of a notch tooth part 398 to a tooth part 393 of a moving rack 39 allows the overload state due to simultaneous meshing to be prevented when the torque of a motro 21 is transferred from a reducer gear 25 and a fixed rack 38 to a reducer gear 27 and the tooth part 393 of the moving rack 39, and smoother operation is attained and a countermeasure for power saving is progressed. Further, when a tray 20 reaches a disk drive position and comes to a stop, a lock member 28 is operated by driving the moving rack 39 by the reducer gear 27 and the tray 20 is locked to the disk drive position. Since the tray 20 is locked surely at the disk drive position, malfunction is prevented and the safety is improved. |
