US 11,656,477 B2
Optical unit with shake correction function
Takeshi Sue, Nagano (JP); Shinji Minamisawa, Nagano (JP); and Tsutomu Arai, Nagano (JP)
Assigned to NIDEC SANKYO CORPORATION, Nagano (JP)
Filed by NIDEC SANKYO CORPORATION, Nagano (JP)
Filed on Jun. 20, 2021, as Appl. No. 17/352,347.
Claims priority of application No. JP2020-106665 (JP), filed on Jun. 22, 2020.
Prior Publication US 2021/0397019 A1, Dec. 23, 2021
Int. Cl. G02B 27/64 (2006.01); G03B 5/06 (2021.01)
CPC G02B 27/648 (2013.01) [G03B 5/06 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An optical unit with a shake correction function, comprising:
a movable body comprising an optical element;
a swing support mechanism which swingably supports the movable body;
a fixed body which comprises a case surrounding an outer peripheral side of the movable body and supports the movable body through the swing support mechanism; and
a magnetic drive mechanism structured to swing the movable body;
wherein the magnetic drive mechanism comprises:
a first magnetic drive mechanism structured to swing the movable body around a first swing axis intersecting an optical axis of the optical element; and
a second magnetic drive mechanism structured to swing the movable body around a second swing axis which intersects the optical axis and intersects the first swing axis; and
wherein each of the first magnetic drive mechanism and the second magnetic drive mechanism comprises:
a coil, fixed to one of the movable body and the case; and
a magnet, fixed to an other of the movable body and the case;
wherein the magnet and the coil face each other in a direction intersecting the optical axis of the optical element;
wherein the swing support mechanism comprises:
a first plate spring which connects an end part of the movable body on one side in a direction of the optical axis with the case; and
a second plate spring which connects an end part of the movable body on an other side in the direction of the optical axis with the case; and
wherein each of the first plate spring and the second plate spring comprises:
a movable body side connecting part connected with the movable body;
a fixed body side connection part connected with the case; and
an arm part which connects the movable body side connecting part with the fixed body side connection part;
wherein the magnet and the coil of each of the first magnetic drive mechanism and the second magnetic drive mechanism are disposed between the first plate spring and the second plate spring when viewed in a direction intersecting the optical axis; and
wherein, when viewed in a direction of the optical axis, the fixed body side connection parts and the arm parts of the first plate spring and the second plate spring are disposed between the magnet and the coil facing each other of the first magnetic drive mechanism and the magnet and the coil facing each other of the second magnetic drive mechanism.