Lens drive device, camera module, and camera mount device

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;
• 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;
• and
• a housing that houses at least the first movable part, the second movable part, the first driving part, and the second driving part,
• 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;
• and
• the housing includes
• a pair of wall parts extending in the direction of the optical axis on both sides on which the first ultrasonic motor and the second ultrasonic motor are respectively disposed with respect to the optical axis, and
• a metal plate bridging the pair of wall parts.

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;
• each of the first ultrasonic motor and the second ultrasonic motor includes a vibration element that generates vibration by applying a high frequency voltage, and a resonance part that causes a resonance according to the vibration of the vibration element so that the resonance part vibrates in an inclined direction inclined with respect to the direction of the optical axis;
• the first driving part includes a moving part connected to the first movable part and the second driving part includes a moving part connected to the second movable part in such a way that each of the moving parts performs movement in the direction of the optical axis according to the resonance of the resonance part and transmits the movement in the direction of the optical axis to a corresponding one of the first movable part and the second movable part;
• and
• the moving parts respectively include
• a first frame and a second frame that are supported so as to be movable in the direction of the optical axis, and
• the moving parts respectively include
• a first interposition part and a second interposition part, each of the first interposition part and the second interposition part being disposed in contact with the corresponding resonance part so as to slide in the direction of the optical axis by being pressed from the resonance part in the inclined direction, the first interposition part and the second interposition part being respectively fixed to the first frame and the second frame,
• wherein
• the first frame is connected to the first movable part via a first elastic member, and
• the second frame is connected to the second movable part via a second elastic member.