POSITION DETECTING MECHANISM FOR MOTOR DRIVER

PROBLEM TO BE SOLVED: To accurately detect and control the position of a moving member by constituting the mechanism in such a way that the actuation of the driven- side member of an intermittent mechanism can become less than one revolution over the full actuating extent of the moving member and a switch actuating section can be actuated one time only even when the moving member moves to the last of the extent. SOLUTION: Over the full actuating extent in the left-right direction of a lens driving member 3, a driven gear 14 is actuated less than one revolution. With camera release, a stepping motor 10, the lens driving member 3, a lens 1, etc., are actuated and, at the same time, an idler gear 12 meshed with an idler gear 4 and a driving gear 13 are rotated and a switch 11 is switched to a turned-on state from a turned-off state until the meshing between a carry gear and a tooth section ends. Thereafter, the driving gear 13 continuously rotates following the rotation of a rotor R, but the driven gear 14 rotates within the meshing extent of the carry gear and tooth section and the lens driving member 3 is moved to a prescribed position while the driven gear 14 is made to make intermittent motions.