| 摘要 |
A vibratory driving device (1) comprising an electromechanical transducer (3) which causes mechanical displacement according to an applied voltage, a driving shaft (4) which is held so as to be displaced in its axial direction by the electromechanical transducer and which is provided on its surface with two resistive bodies (8) extending in the axial direction and connected to the electromechanical transducer at one end, a movable member (5) which slidably engages on the driving shaft so as to contact with the two resistive bodies to connect electrically the contacted points of the resistive bodies each other, a driving circuit (13) which applies a periodical driving voltage to the electromechanical transducer, and a measuring circuit (15) which measures electric resistance between the two resistive bodies can determine a position of the movable member and has a simplified wiring (7) with low risk of disconnection. |
