Lens drive device
AssigneeNidec Sankyo Corporation
InventorsYukio Furuya, Takeshi Sue, Akira Mori
Life of this patent
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Abstract
A lens drive device may include a support body, a movable body which holds a lens, a magnetic drive mechanism which drives the movable body, a spring member provided with an arm part whose both ends are connected with the movable body and the support body. Only one piece of the spring member may be disposed between an end part on one side in a lens optical axis direction of the movable body and the support body. A displacement prevention mechanism may be structured at an end part on the other side in the lens optical axis direction of the movable body. The displacement prevention mechanism may include a protruded part and a recessed part.
Claims25
A lens drive device for driving a lens, the lens drive device comprising:
- a support body;
- a movable body which holds the lens;
- a magnetic drive mechanism which drives the movable body in a lens optical axis direction;
- and
- a spring member which is provided with an arm part whose both ends are connected with the movable body and the support body;
- wherein only one piece of the spring member is disposed between an end part on one side in a lens optical axis direction of the movable body and the support body;
- and wherein a displacement prevention mechanism is structured at an end part on the other side in the lens optical axis direction of the movable body, the displacement prevention mechanism being comprised of a protruded part which is extended in the lens optical axis direction from one of the movable body and the support body and a recessed part which is provided in the other of the movable body and the support body and opened in the lens optical axis direction and into which the protruded part is fitted so that displacement in a radial direction perpendicular to the lens optical axis direction of the movable body, circumferential displacement around the lens optical axis of the movable body, and inclination of the movable body with respect to the lens optical axis are prevented.
The lens drive device according to claim 22, wherein the displacement prevention mechanism is structured so that an excessive movement of the movable body in the lens optical axis direction is also prevented by the end part of the protruded part and the bottom part of the recessed part.
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The lens drive device according to claim 22, wherein
- each of the support body and the movable body is provided with an external shape which is substantially a rectangular prism shape, and
- the displacement prevention mechanism is disposed at a position corresponding to corner portions of the support body and the movable body when viewed in the lens optical axis direction.
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Dependencies are inferred from the claim text.