Invention Grant
- Patent Title: Method of driving vibration actuator with enhanced sliding efficiency, vibration drive device, and mechanical apparatus
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Application No.: US15363504Application Date: 2016-11-29
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Publication No.: US10516349B2Publication Date: 2019-12-24
- Inventor: Satoshi Tsuchiya , Takao Mori
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Venable LLP
- Priority: JP2015-237395 20151204
- Main IPC: H02N2/12
- IPC: H02N2/12 ; H02N2/00 ; H02N2/10 ; H02N2/14 ; H02N2/16 ; H04N5/232 ; G02B7/14 ; H04N5/225

Abstract:
A vibration actuator includes a vibration element including a piezoelectric element as an electromechanical energy conversion element and an elastic body which is joined to the piezoelectric element, and a driven element which is brought into pressure contact with the elastic body. Driving vibration is excited in the vibration element by applying a drive signal to the piezoelectric element, whereby the vibration element and the driven element are moved relative to each other. The driving vibration is a vibration in which at least n-th-order vibration and 2n-th-order vibration are combined, n being a natural number.
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