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    • 3. 发明授权
    • Ultrasonic motor
    • 超声波电机
    • US07508114B2
    • 2009-03-24
    • US11371517
    • 2006-03-08
    • Yasuaki KasaiMakoto Harada
    • Yasuaki KasaiMakoto Harada
    • H01L41/09
    • H01L41/0906
    • It is an object to provide an ultrasonic motor that can stably and finely (that is, minutely) move a driven body. The invention provides an ultrasonic motor comprising an ultrasonic vibrator which includes an electromechanical transducer and which is configured to simultaneously generate two different vibration modes to produce substantially elliptical vibrations at output terminals by supplying two sets of alternating-current voltages with a predetermined phase difference and a predetermined driving frequency to the electromechanical transducer; and a pressing unit for pressing the output terminals of the ultrasonic vibrator against a driven body. The output terminals include first friction-contact members disposed at positions substantially corresponding to antinodes of a flexural vibration and a second friction-contact member disposed substantially at the center in the longitudinal direction of the ultrasonic vibrator.
    • 本发明的目的是提供一种能够稳定且精细(即精细地)移动被驱动体的超声波马达。 本发明提供一种超声波电动机,其包括超声波振动器,该超声波振动器包括机电换能器,其被配置为同时产生两种不同的振动模式,以在输出端产生基本上椭圆的振动,通过提供具有预定相位差的两组交流电压, 预定的机电换能器的驱动频率; 以及用于将超声波振动器的输出端子压靠在被驱动体上的按压单元。 输出端子包括设置在基本上对应于弯曲波动的波腹的位置处的第一摩擦接触构件和基本上设置在超声波振动器的纵向方向上的中心的第二摩擦接触构件。