US 12,242,130 B2
Vibration-type driving apparatus and apparatus having the same
Kota Asano, Tochigi (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Sep. 17, 2021, as Appl. No. 17/477,938.
Claims priority of application No. 2020-166207 (JP), filed on Sep. 30, 2020.
Prior Publication US 2022/0099915 A1, Mar. 31, 2022
Int. Cl. G02B 7/04 (2021.01); G03B 13/34 (2021.01); H02N 2/00 (2006.01); H02N 2/02 (2006.01)
CPC G02B 7/04 (2013.01) [G03B 13/34 (2013.01); H02N 2/0065 (2013.01); H02N 2/026 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A vibration-type driving apparatus comprising:
a vibrator unit including:
a vibrator in which vibration is excited by an electro-mechanical energy convertor; and
a holder configured to hold the vibrator;
a contact body in contact with the vibrator, and
a pressurizing unit configured to pressurize the vibrator so as to make the vibrator come into contact with the contact body,
wherein the pressurizing unit includes:
a first pressurizing plate;
a vibration isolating member provided between the first pressurizing plate and the vibrator;
a second pressurizing plate facing the first pressurizing plate on an opposite side from the vibration isolating member, and having a protrusion coming into contact with the first pressurizing plate, and
a pressurizing member configured to provide the second pressurizing plate with a pressurizing force,
wherein the vibrator and the contact body move relative to each other when vibration at a frequency higher than an audible range is excited in the vibrator, and
wherein the contact body has a shape that satisfies a following condition:
fD±fSMN≠fSL
where fD represents a driving frequency of the vibrator, fSMN (N is an integer) represents a frequency of a vibration mode in the audible range among a plurality of vibration modes of the vibrator unit, and fSL represents a frequency of out-of-plane vibration occurring in the contact body.