Invention Grant
- Patent Title: Vibration wave motor, drive control system, optical apparatus, and electronic apparatus
-
Application No.: US16174898Application Date: 2018-10-30
-
Publication No.: US11258376B2Publication Date: 2022-02-22
- Inventor: Tatsuo Furuta , Akira Uebayashi , Tomohiro Watanabe , Shinya Koyama
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: Canon U.S.A., Inc. IP Division
- Priority: JPJP2017-214156 20171106,JPJP2018-185422 20180928
- Main IPC: H02N2/00
- IPC: H02N2/00 ; H01L41/04 ; H01L41/047 ; H01L41/187 ; H01L41/113 ; H02N2/16 ; H04N5/225 ; G02B7/08 ; G02B7/02

Abstract:
A vibration wave motor includes a driven body, a vibrator including an annular vibration plate and an annular piezoelectric element, and a vibration damping member, which are arranged in sequence, wherein the vibration plate has, on a side facing the driven body, radially extending groove portions at X places, and, when center depths of the groove portions at X places are sequentially denoted by D1 to DX in a circumferential direction, D1 to DX vary along a curve obtained by superposing one or more sine waves, and wherein the vibration plate is locally supported by the vibration damping member in some or all antinode portions of a standing wave occurring when the vibration wave motor is driven.
Public/Granted literature
- US20190140558A1 VIBRATION WAVE MOTOR, DRIVE CONTROL SYSTEM, OPTICAL APPARATUS, AND ELECTRONIC APPARATUS Public/Granted day:2019-05-09
Information query