US 12,422,694 B2
Optical unit with shake correction function
Tsutomu Arai, Nagano (JP); Takeshi Sue, Nagano (JP); and Shinji Minamisawa, Nagano (JP)
Assigned to NIDEC INSTRUMENTS CORPORATION, Nagano (JP)
Filed by NIDEC INSTRUMENTS CORPORATION, Nagano (JP)
Filed on May 23, 2023, as Appl. No. 18/322,568.
Claims priority of application No. 2022-086607 (JP), filed on May 27, 2022.
Prior Publication US 2023/0384612 A1, Nov. 30, 2023
Int. Cl. G02B 27/64 (2006.01); H04N 23/68 (2023.01)
CPC G02B 27/646 (2013.01) [H04N 23/687 (2023.01); G03B 2205/0007 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An optical unit with a shake correction function, comprising:
a movable body comprising a camera module;
an intermediate member that holds the movable body in a rotatable manner;
a fixed body that holds the intermediate member in a rotatable manner; and
a drive mechanism to rotate the movable body relative to the fixed body in such a manner that an optical axis of the camera module tilts in a selected direction, wherein,
the movable body comprises a cylindrical metal holder having an inner peripheral side on which the camera module is fixed, the movable body being rotatable relative to the intermediate member with a first intersecting direction being an axial direction of rotation, the first intersecting direction intersecting the optical axis of the camera module,
the intermediate member comprises a plate spring and is rotatable relative to the fixed body with a second intersecting direction being an axial direction of rotation, the second intersecting direction intersecting the first intersecting direction and the optical axis of the camera module,
the fixed body comprising a cylindrical resin case surrounding an outer peripheral surface of the holder, and a metal rotation regulating member being fixed to the case and being in contact with the holder to regulate a range of rotation of the movable body relative to the fixed body, and
when a direction of the optical axis of the camera module is an optical axis direction, and a direction orthogonal to the optical axis of the camera module positioned at a predetermined reference position is a first direction,
the outer peripheral surface of the holder has an edge comprising an end portion of an end surface in the optical axis direction of a metal part comprising at least a portion of the outer peripheral surface of the holder,
an inner peripheral side of the case has a case-side protrusion projecting toward the inner peripheral side of the case, and when the movable body moves in the first direction relative to the fixed body while the optical axis of the camera module has a maximum tilt, a portion of the metal part disposed farther inward than the edge in the optical axis direction comes into contact with the case-side protrusion before the edge comes into contact with an inner peripheral surface of the case, or a holder-side protrusion projecting toward an outer peripheral side of the holder is formed or fixed on the outer peripheral side of the holder, and
when the movable body moves in the first direction relative to the fixed body while the optical axis of the camera module has the maximum tilt, the holder-side protrusion comes into contact with the inner peripheral surface of the case before the edge comes into contact with the inner peripheral surface of the case.