Lens drive device
AssigneeNidec Sankyo Corporation
InventorsMakoto AKABANE, Akira MORI
Life of this patent
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Abstract
A lens drive device may include a thrust direction stopper mechanism which includes a thrust movement preventing abutting part of the movable body and a thrust movement preventing abutted part of the fixed body for restricting a moving range toward an object side of the movable body, and a radial direction stopper mechanism which includes a radial movement preventing abutting part of the movable body and a radial movement preventing abutted part of the fixed body for restricting a moving range in a radial direction of the movable body. The moving range in the radial direction under an inclined posture of the movable body with respect to an optic axis is restricted over all directions by the radial direction stopper mechanism and the thrust direction stopper mechanism.
Claims17
A lens drive device comprising:
- a fixed body;
- a movable body which includes a lens;
- a magnetic drive mechanism which includes a magnet disposed on the fixed body and a coil disposed on the movable body for magnetically driving the movable body in a lens optical axis direction;
- a spring member which connects the movable body with the fixed body;
- a thrust direction stopper mechanism which includes a thrust movement preventing abutting part of the movable body and a thrust movement preventing abutted part of the fixed body between the movable body and the fixed body for restricting a moving range toward an object to be photographed side of the movable body by abutting of the thrust movement preventing abutting part with the thrust movement preventing abutted part;
- and
- a radial direction stopper mechanism which includes a radial movement preventing abutting part of the movable body and a radial movement preventing abutted part of the fixed body between the movable body and the fixed body for restricting a moving range in a radial direction of the movable body by abutting of the radial movement preventing abutting part with the radial movement preventing abutted part;
- wherein the fixed body is provided with a top plate part for covering the movable body on the object to be photographed side and the top plate part is formed with a light transmission opening through which light is incident to the lens;
- wherein the thrust direction stopper mechanism and the radial direction stopper mechanism are provided with one of a structure continuously formed along an entire circumference and a structure formed at plural places in a circumferential direction;
- and
- the moving range in the radial direction under an inclined posture of the movable body with respect to an optic axis is restricted over all directions by the radial direction stopper mechanism and the thrust direction stopper mechanism.
Dependencies are inferred from the claim text.