Invention Grant
- Patent Title: Vibration wave motor
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Application No.: US14797731Application Date: 2015-07-13
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Publication No.: US10230312B2Publication Date: 2019-03-12
- Inventor: Shunsuke Ninomiya
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Cowan, Liebowitz & Latman, P.C.
- Priority: JP2014-145638 20140716
- Main IPC: H02N2/02
- IPC: H02N2/02 ; H02N2/00

Abstract:
A vibration wave motor includes a vibration plate having a flat plate portion and protruding portions, a piezoelectric element that performs high-frequency vibration, a friction member contacting the protruding portions, and a first natural vibration mode and a second natural vibration mode, which are excited in the vibration plate by the high-frequency vibration, the vibration plate and the friction member moving relatively to each other, maximum amplitude generated on tip ends of the protruding portions by the first natural vibration mode is larger than maximum amplitude generated on tip ends of the protruding portions by the second natural vibration mode, a resonance frequency of the first natural vibration mode is lower than a resonance frequency of the second natural vibration mode, and amplitudes of the first natural vibration mode and the second natural vibration mode in a frequency range at a time of drive substantially coincide with each other.
Public/Granted literature
- US20160020712A1 VIBRATION WAVE MOTOR Public/Granted day:2016-01-21
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