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Title:
VIBRATION WAVE MOTOR, DRIVE CONTROL SYSTEM, AND OPTICAL APPARATUS
Document Type and Number:
Japanese Patent JP2019216589
Kind Code:
A
Abstract:
To provide a vibration wave motor with improved driving efficiency and reduced power consumption and a drive control system and an optical apparatus using the same.SOLUTION: The vibration wave motor for solving the above-mentioned problems includes: an annular vibrator; and an annular mobile body. The vibrator has an annular diaphragm in contact with the mobile body and a piezoelectric element. The piezoelectric element has a plurality of drive phase electrodes. When an area of the vibrator in which the drive phase electrode is disposed is a driving area and the other vibrator areas are non-driving areas, a contact area ratio S1 between the diaphragm and the mobile body in the non-driving area is smaller than a contact area ratio S2 between the diaphragm and the mobile body in the driving area.SELECTED DRAWING: Figure 12

Inventors:
KAMIBAYASHI AKIRA
WATANABE TOMOHIRO
FURUTA TATSUO
KOYAMA SHINYA
Application Number:
JP2019104726A
Publication Date:
December 19, 2019
Filing Date:
June 04, 2019
Export Citation:
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Assignee:
CANON KK
International Classes:
H02N2/16; G02B7/04
Attorney, Agent or Firm:
Okabe
Takao Ochi
Koji Yoshizawa
Masami Saito