US 11,747,642 B2
Optical unit
Tomohiro Egawa, Kyoto (JP); Keishi Otsubo, Kyoto (JP); Kazuhiro Sazai, Kyoto (JP); Genki Tanaka, Kyoto (JP); and Takayuki Iwase, Kyoto (JP)
Assigned to NIDEC CORPORATION, Kyoto (JP)
Filed by NIDEC CORPORATION, Kyoto (JP)
Filed on Feb. 15, 2021, as Appl. No. 17/175,697.
Claims priority of application No. 2020-051171 (JP), filed on Mar. 23, 2020.
Prior Publication US 2021/0294111 A1, Sep. 23, 2021
Int. Cl. G02B 27/64 (2006.01); G02B 26/08 (2006.01); G03B 5/00 (2021.01); G02B 7/18 (2021.01)
CPC G02B 27/646 (2013.01) [G02B 7/1805 (2013.01); G02B 26/0816 (2013.01); G03B 5/00 (2013.01); G03B 2205/0007 (2013.01); G03B 2205/0069 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An optical unit, comprising:
an optical element that has a reflecting surface reflecting light in a first axis direction;
a holder configured to hold the optical element;
a case configured to swingably support the holder;
a first swing mechanism configured to cause the holder to swing with respect to the case with reference to a second axis direction orthogonal to the first axis direction; and
a second swing mechanism configured to cause the holder to swing with respect to the case with reference to a third axis direction orthogonal to each of the first axis direction and the second axis direction, wherein:
the holder has
a first protrusion provided on a first case facing surface facing the case and projecting toward the case, and
a second protrusion provided on a second case facing surface facing the case and projecting toward the case;
the case has
a first recess provided on a first holder facing surface facing the first case facing surface of the holder and accommodating at least a part of the first protrusion, and
a second recess provided on a second holder facing surface facing the second case facing surface of the holder and accommodating at least a part of the second protrusion;
the first recess has
a first side surface located on one side in the third axis direction of the first protrusion,
a second side surface located on the other side in the third axis direction of the first protrusion, and
a bottom surface connecting the first side surface of the first recess and the second side surface of the first recess;
the second recess has
a first side surface located on one side in the third axis direction of the second protrusion,
a second side surface located on the other side in the third axis direction of the second protrusion, and
a bottom surface connecting the first side surface of the second recess and the second side surface of the second recess;
the first protrusion is configured to move in the first recess, in which the first protrusion is accommodated, while the holder is caused to swing by the first swing mechanism:
the first protrusion is configured to move in the first recess, in which the first protrusion is accommodated, while the holder is caused to swing by the second swing mechanism:
the second protrusion is configured to move in the second recess, in which the second protrusion is accommodated, while the holder is caused to swing by the first swing mechanism; and
the second protrusion is configured to move in the second recess, in which the second protrusion is accommodated, while the holder is caused to swing by the second swing mechanism.