Optical actuator, camera module, and camera-mounted device
AssigneeMitsumi Electric Co., Ltd.
InventorsTomohiko Osaka, Yohei Enta
Life of this patent
Estimating the term…
Abstract
An optical actuator that comprises an inside holder that can hold an optical path bending member, an outside holder supporting the inside holder such that the inside holder can pivot around a first axis, and a drive unit making the inside holder pivot. Either end part of the inside holder is rotatably supported on the outside holder. The drive unit has: an ultrasonic motor supported on the outside holder, and an intermediate part supported on the inside holder. The ultrasonic motor has an oscillator that resonates, and the intermediate part has a fan-shaped contact part that contacts the oscillator.
Claims7
An optical actuator, comprising:
- an inner holder comprising a plated-shaped mount part including an upper surface and a lower surface and capable of holding an optical path bending member on the upper surface, the optical path bending member being configured to make a light entering in a Z direction emit in an X direction;
- an outer holder comprising:
- a pair of side plate parts configured to support the inner holder in a swayable manner about a first axis extending in parallel to a Y direction;
- and
- an inclined plate part provided between the pair of side plate parts in the Y direction and forming an accommodation space for the inner holder together with the pair of side plate parts;
- and
- a drive unit configured to sway the inner holder, wherein:
- the inner holder is rotatably supported through a bearing part with respect to the pair of side plate parts of the outer holder at both end portions of the inner holder in the Y direction,
- the drive unit includes an ultrasonic motor and an interposition part, the ultrasonic motor being supported by the outer holder, the interposition part being supported by the inner holder,
- the upper surface and the lower surface of the plated-shaped mount part are disposed to extend to be in parallel to the Y direction and inclined with respect to the X direction and the Z direction,
- the inclined plate part includes an upper surface disposed to extend to be in parallel to the Y direction and inclined with respect to the X direction and the Z direction to face the lower surface of the plated-shaped mount part to form an inclined gap therebetween,
- the ultrasonic motor includes a resonator including a transducer configured to resonate, the resonator being a plate-shaped member disposed on the upper surface of the inclined plate part in the inclined gap, and
- the interposition part includes a contact part disposed the inclined gap and configured to come into contact with the transducer, the contact part having a fan shape.
Dependencies are inferred from the claim text.