CAMERA DRIVE DEVICE

摘要

A camera driving apparatus according to the present invention includes: a camera section with an imaging plane; a movable unit which houses the camera section inside and includes an attracting magnet and a convex partial sphere on its outer surface; a fixed unit which has a depressed portion in which a magnetic body and the movable unit are loosely fit, which brings the convex partial sphere of the movable unit into a point or line contact with the depressed portion under magnetic attractive force of the attracting magnet to the magnetic body, and which allows the movable unit to rotate freely on the spherical centroid of the first convex partial sphere; a panning driving section; a tilting driving section; a rolling driving section; a camera driving section which shifts an image sensor two-dimensionally in a plane that intersects with the optical axis at right angles and which rotates the image sensor on the optical axis; a first detector which detects the tilt angles of the camera section in the panning and tilting directions; a second detector which detects the angle of rotation of the camera section that is rotating in the rolling direction; and a third detector which detects the magnitudes of shift of the image sensor along the panning rotation axis and the tilting rotation axis.

主权项

1. A camera driving apparatus comprising:
a camera section including an image sensor which has an imaging plane, a lens which has an optical axis and which produces a subject image on the imaging plane, and a lens barrel to support the lens; a movable unit which includes at least one attracting magnet, houses the camera section inside, and has a first convex partial sphere on outer surface thereof; a fixed unit which has a depressed portion in which at least one magnetic body and at least a portion of the movable unit are loosely fit and which brings the first convex partial sphere of the movable unit into a point or line contact with the depressed portion under magnetic attractive force of the at least one attracting magnet to the at least one magnetic body, the fixed unit allowing the movable unit to rotate freely on the spherical centroid of the first convex partial sphere; a panning driving section which tilts the camera section in a panning direction with respect to the fixed unit; a tilting driving section which tilts the camera section in a tilting direction that intersects with the panning direction at right angles with respect to the fixed unit; a rolling driving section which rotates the camera section in a rolling direction around the optical axis of the lens with respect to the fixed unit; an image sensor driving section which shifts the image sensor with respect to the movable unit in a panning rotation axis direction that defines the axis of rotation in the panning direction and in a tilting rotation axis direction that defines the axis of rotation in the tilting direction; a first detector which detects the tilt angles of the camera section in the panning and tilting directions with respect to the fixed unit; a second detector which detects the angle of rotation of the camera section that rotates in the rolling direction; and a third detector which detects the magnitudes of shift of the image sensor in the panning rotation axis direction and in the tilting rotation axis direction.