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1. 发明授权

US5233258A Ultrasonic sheet feeder, low-profile ultrasonic motor, and method of driving the same 失效
标题翻译：超声波送纸机，低调超声波电机及其驱动方法
公开(公告)号：US5233258A
公开(公告)日：1993-08-03
申请号：US854541
申请日：1992-03-19
申请人： Osamu Myoga , Takeshi Inoue , Michihisa Suga
发明人： Osamu Myoga , Takeshi Inoue , Michihisa Suga
IPC分类号： B65H5/00 , H01L41/09 , H02N2/16
CPC分类号： B65H5/008 , H02N2/0025 , H02N2/026
摘要： An ultrasonic sheet feeder includes a convex shell, piezoelectric ceramic elements, a base, a roller, and a driving power source. The convex shell has a protruding middle portion. Each piezoelectric ceramic element has one end in contact with a corresponding one of the two ends of the convex shell. The base serves to fix the other end of each of the piezoelectric ceramic elements. The roller is arranged to oppose the protruding middle portion of the convex shell so as to urge a paper sheet against the convex shell when the paper sheet is loaded. The coefficient of friction of a contact portion of the roller with respect to the paper sheet is smaller than that of a contact portion of the convex shell with respect to the paper sheet. The driving power source applies AC voltages having a phase difference to the two piezoelectric ceramic elements. A low-profile ultrasonic motor used for the ultrasonic sheet feeder and methods of driving the motor and the sheet feeder are also disclosed.
摘要翻译：超声波供纸器包括凸壳，压电陶瓷元件，基座，辊子和驱动电源。凸壳具有突出的中间部分。每个压电陶瓷元件的一端与凸壳的两端中相应的一端接触。基座用于固定每个压电陶瓷元件的另一端。辊被布置成与凸壳的突出的中间部分相对，以便当纸张被装载时将纸张推压到凸壳上。辊相对于纸张的接触部分的摩擦系数小于凸壳相对于纸张的接触部分的摩擦系数。驱动电源向两个压电陶瓷元件施加具有相位差的交流电压。还公开了一种用于超声波供纸器的低调超声波马达以及驱动马达和送纸器的方法。

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