Camera drive device

摘要

A camera driving apparatus according to the present invention includes: a camera portion having an imaging plane; a movable unit incorporating the camera portion, including an attracting magnet, and having an outer shape formed as a convex partial spherical surface; a fixing unit which includes a magnetic body and a concave portion to which the movable unit is loosely fitted, and in which a magnetic attraction force of the attracting magnet with respect to the magnetic body causes the convex partial spherical surface of the movable unit and the concave portion to be held in point contact or linear contact with each other, thereby enabling the movable unit to freely rotate about a spherical center of the first convex partial spherical surface; a panning drive portion; a tilting drive portion; a rolling drive portion; and a detector for detecting a tilt angle of the camera portion in a panning direction with respect to the fixing unit, a tilt angle of the camera portion in a tilting direction with respect to the fixing unit, and a rotation angle of the camera unit to be rotated in a rolling direction with respect to the fixing unit.

主权项

1. A camera driving apparatus, comprising:
a camera portion comprising:
an imaging element having an imaging plane;a lens for forming an object image on the imaging plane, the lens having an optical axis; anda lens barrel for holding the lens; a movable unit comprising at least one attracting magnet, incorporating the camera portion, and having an outer shape formed as a first convex partial spherical surface; a fixing unit which comprises at least one magnetic body and a concave portion to which at least a part of the movable unit is loosely fitted, and in which a magnetic attraction force of the at least one attracting magnet with respect to the at least one magnetic body causes the first convex partial spherical surface of the movable unit and the concave portion to be held in point contact or linear contact with each other, thereby enabling the movable unit to freely rotate about a spherical center of the first convex partial spherical surface; a panning drive portion for tilting the camera portion in a panning direction with respect to the fixing unit, the panning drive portion comprising:
a pair of panning drive magnets arranged in the movable unit symmetrically with respect to the optical axis;a pair of panning magnetic yokes arranged in the fixing unit so as to respectively face the pair of panning drive magnets; anda pair of panning drive coils wound respectively around the pair of panning magnetic yokes; a tilting drive portion for tilting the camera portion in a tilting direction, which is orthogonal to the panning direction, with respect to the fixing portion, the tilting drive portion comprising:
a pair of tilting drive magnets arranged in the movable unit symmetrically with respect to the optical axis;a pair of tilting magnetic yokes arranged in the fixing unit so as to respectively face the pair of tilting drive magnets; anda pair of tilting drive coils wound respectively around the pair of tilting magnetic yokes; a rolling drive portion for rotating the camera portion in a rolling direction, in which the camera portion is rotated about the optical axis of the lens, with respect to the fixing unit; a detector for detecting:
a tilt angle of the camera portion in the panning direction with respect to the fixing unit;a tilt angle of the camera portion in the tilting direction with respect to the fixing unit; anda rotation angle of the camera portion to be rotated in the rolling direction with respect to the fixing unit; and wiring components connected to the camera portion and each formed of a flexible printed wiring board; wherein the wiring components are linearly symmetrically arranged with respect to the optical axis, and are fixed to the movable unit in a direction in which an angle of 45 degrees is formed with respect to a line connecting the pair of tilting drive magnets to each other or a line connecting the pair of panning drive magnets to each other in a plane perpendicular to the optical axis.