| 摘要 |
PURPOSE:To make the device compact and lightweight to facilitate the manufacture and assembly and make it possible to reduce the generation of noise by arranging housings containing ultrasonic linear motor on a window panel, thereby driving the window. CONSTITUTION:A high frequency voltage is applied to a vibrator 28 consisting of an ultrasonic linear motor 25 attached through housing 4, 5 to a wind panel 6 to generate an expansive and contractive action in accordance with the frequency. By vibration-displacement of different phases generated in a pair of driving legs 27b, 27c which are different in their resonant frequencies, a moving member 27 runs along guide rails 2, 3 laid on a door panel. At this time, the driving legs 27b, 27c are constantly brought into contact with the faces of the guide rails 2, 3 with pressure by a spring means, and thus stabilized running of the moving member can be maintained. |
