专利名称：VIBRATION WAVE DEVICE发明人：OKUMURA ICHIRO,MUKOJIMA
HITOSHI,TSUKIMOTO TAKAYUKI,ATSUTAAKIO,UEDA KOICHI,KANAZAWA HAJIME
申请号：JP3534889申请日：19890214公开号：JPH02214477A公开日：19900827
摘要：PURPOSE:To suppress noise by providing irregular grooves, etc., on a specificpart of a member of a vibration wave device made of an elastic member, etc.CONSTITUTION:A vibration wave motor is composed of an elastic member 1, apiezoelectric element, a rotor as a moving element, etc. The member 1 is formed withmany grooves 1A each having a width t1 and a depth h1 on the whole periphery of thecontact face with the rotor. Parts of the grooves are deep grooves 1B each having adepth h2. If the number of the waves of the vibration generating noises is, for example, 3,six grooves 1B are formed at intervals of a pitch theta=60.
申请人：CANON INC
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