发明授权
US5990597A Ultrasonic motor having high drive efficiency 失效
超声波电机具有较高的驱动效率

  • 专利标题: Ultrasonic motor having high drive efficiency
  • 专利标题(中): 超声波电机具有较高的驱动效率
  • 申请号: US999698
    申请日: 1997-06-27
  • 公开(公告)号: US5990597A
    公开(公告)日: 1999-11-23
  • 发明人: Tadao TakagiDaisuke Saya
  • 申请人: Tadao TakagiDaisuke Saya
  • 申请人地址: JPX Tokyo
  • 专利权人: Nikon Corporation
  • 当前专利权人: Nikon Corporation
  • 当前专利权人地址: JPX Tokyo
  • 优先权: JPX1-32085 19890210; JPX1-50711 19890301; JPX1-240375 19890916; JPX1-265793 19891012; JPX1-332299 19891221
  • 主分类号: H01L41/09
  • IPC分类号: H01L41/09 H02N2/12 H02N2/16 H01L41/08
Ultrasonic motor having high drive efficiency
摘要:
An ultrasonic motor has a stator having a piezoelectric member vibrated by a drive signal, and an elastic member for generating traveling vibration wave in a drive surface thereof upon vibration of the piezoelectric member, a rotor which is urged against the drive surface of the elastic member and is driven by the generated traveling vibration wave, a support member integrally molded on the elastic member, and a fixing member for holding the support member. In the ultrasonic motor, one end face of the support member is formed at the same level as the drive surface or the junction surface of the elastic member, an electrode of the piezoelectric member is grounded through the support member, a plurality of holes are regularly formed in the circumferential direction of the support member, or the support member is fixed to the fixing member by an adhesive, thereby improving drive efficiency.
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