US 12,013,587 B2
Optical unit
Takeshi Sue, Nagano (JP)
Assigned to NIDEC SANKYO CORPORATION, Nagano (JP)
Filed by NIDEC SANKYO CORPORATION, Nagano (JP)
Filed on Sep. 28, 2021, as Appl. No. 17/486,948.
Claims priority of application No. 2020-167694 (JP), filed on Oct. 2, 2020.
Prior Publication US 2022/0107479 A1, Apr. 7, 2022
Int. Cl. G02B 7/02 (2021.01); G02B 7/08 (2021.01); G02B 27/64 (2006.01); G03B 30/00 (2021.01); H02K 33/18 (2006.01)
CPC G02B 7/02 (2013.01) [G02B 7/08 (2013.01); G02B 27/646 (2013.01)] 4 Claims
OG exemplary drawing
 
1. An optical unit comprising:
a movable body, having an optical module;
a fixed body, configured to surround the movable body in a peripheral direction intersecting an optical axis direction of the optical module;
a turning support mechanism, configured to turnably support the movable body with respect to the fixed body with a direction intersecting the optical axis direction as a turning axis, wherein the turning support mechanism is a gimbal mechanism including: a gimbal frame part provided with a circular hole for passing the optical module, and a connection part connecting the movable body with the fixed body; and
a drive mechanism comprising:
a coil, being disposed on one of the movable body and the fixed body; and
a plurality of magnets, being disposed on the other of the movable body and the fixed body at a position facing the coil;
wherein an end part in the optical axis direction of the coil is bent in a direction approaching the turning axis; and
wherein the plurality of the magnets is disposed side by side so that faces of the plurality of the magnets facing the coil become approximately parallel to the coil when viewed in a direction of the turning axis in comparison with a case that the plurality of the magnets is arranged along the optical axis direction;
wherein
regions on both end part sides of the coil in the optical axis direction form two effective sides extended in the direction of the turning axis,
regions between the both end part sides of the coil in the optical axis direction form two ineffective sides;
the plurality of the magnets is disposed side by side in a state having a step with respect to an adjacent magnet,
the magnet facing one of the two effective sides and the adjacent magnet facing one of the two ineffective sides are spaced apart from each other with a distance in the direction of the turning axis to be as the step,
the magnet facing another of the two effective sides and the adjacent magnet facing another of the two ineffective sides are spaced apart from each other with a distance in the direction of the turning axis to be as the step.