| 摘要 |
A positioning mechanism for a moving member (62) moved linearly by the rotation of a thread member (64) driven by a stepping motor (80), wherein a drive shaft (80a) drivingly rotated by the stepping motor (80) is connected rotatably and transmittably to the thread member (64) threaded with the linearly movable moving member (62), means for preventing the moving member (62) from turning as the thread member (64) is turned is provided, the movement of the movement member (62) provided by drivingly rotating the motor (80) in one direction is stopped by a stopper (68) for centering an origin, the movement member (62) is positioned according to the rotating step of the motor (80) in the other direction after centering the origin, and the drive shaft (80a) and thread member (64) are fitted rotatably and transmittably to each other through an elastic body (82). <IMAGE> |
