| 摘要 |
PURPOSE:To restrict actuation of a lock motor for a telescopic tube every time adjustment is repeated, and reduce noise by maintaining the lock motor unlocked for a predetermined time after an adjustment switch is changed from on to off. CONSTITUTION:An unillustrated telescopic tube is supported by an unillustrated bracket to be reciprocating along the axial line. The telescopic tube is driven to reciprocate by a drive motor 26, and it is locked to be unable to reciprocate by a lock motor 54. In the meanwhile, when an adjustment switch 62 operated by vehicle crew is put on, control means 66 controls to release lock by the lock motor 54 and drive the drive motor 26. At this time, the control means 66 controls to keep the lock motor 54 unlocked for a predetermined time after a timing when the adjustment switch 62 is changed from on into off. Noise of the lock motor 54 can thus be reduced. |
