US 12,436,355 B2
Lens drive device, camera module, and camera mount device
Tomohiko Osaka, Tokyo (JP); and Shun Suzuki, Tokyo (JP)
Assigned to Mitsumi Electric Co., Ltd., Tokyo (JP)
Appl. No. 17/785,463
Filed by Tomohiko Osaka, Tokyo (JP); and Shun Suzuki, Tokyo (JP)
PCT Filed Dec. 21, 2020, PCT No. PCT/JP2020/047620
§ 371(c)(1), (2) Date Jun. 15, 2022,
PCT Pub. No. WO2021/132129, PCT Pub. Date Jul. 1, 2021.
Claims priority of application No. 2019-236300 (JP), filed on Dec. 26, 2019.
Prior Publication US 2023/0022577 A1, Jan. 26, 2023
Int. Cl. G02B 7/02 (2021.01); G01D 5/14 (2006.01); G03B 5/00 (2021.01); G03B 13/36 (2021.01); H02N 2/02 (2006.01); H04N 23/51 (2023.01); H04N 23/80 (2023.01)
CPC G02B 7/021 (2013.01) [G03B 5/00 (2013.01); G03B 13/36 (2013.01); G01D 5/145 (2013.01); G03B 2205/0046 (2013.01); G03B 2205/0084 (2013.01); H02N 2/026 (2013.01); H04N 23/51 (2023.01); H04N 23/80 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A lens driving device, comprising:
a first movable part and a second movable part arranged in a direction of an optical axis, wherein the first movable part is capable of holding a first movable lens, and the second movable part is capable of holding a second movable lens; and
a first driving part and a second driving part that respectively drive the first movable part and the second movable part in the direction of the optical axis,
wherein:
the first driving part and the second driving part respectively include a first ultrasonic motor and a second ultrasonic motor, the first ultrasonic motor and the second ultrasonic motor are disposed so as to be opposite to each other with respect to the optical axis, the first ultrasonic motor independently drives the first movable part in the direction of the optical axis, and the second ultrasonic motor independently drives the second movable part in the direction of the optical axis;
the first driving part includes a first frame and a first drive shaft both disposed on the side on which the first ultrasonic motor is disposed with respect to the optical axis;
the first frame is connected to the first movable part;
the second driving part includes a second frame and a second drive shaft both disposed on the side on which the second ultrasonic motor is disposed with respect to the optical axis; and
the second frame is connected to the second movable part.