US 12,411,433 B2
Scanning optical device having positioning part on reinforced wall for positioning of the device relative to main body of image-forming apparatus
Junichi Yokoi, Nagoya (JP); and Koji Abe, Okazaki (JP)
Assigned to BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed by BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed on Oct. 25, 2023, as Appl. No. 18/494,439.
Claims priority of application No. 2022-184677 (JP), filed on Nov. 18, 2022.
Prior Publication US 2024/0168403 A1, May 23, 2024
Int. Cl. G03G 15/04 (2006.01)
CPC G03G 15/04036 (2013.01) 15 Claims
OG exemplary drawing
 
1. A scanning optical device mounted on a main body of an image-forming apparatus, the scanning optical device comprising:
a light source configured to emit a light beam;
a deflector comprising a polygon mirror configured to deflect the light beam from the light source, the polygon mirror being rotatable about an axis extending in a first direction;
a scanning optical system configured to form an image on an image plane using the light beam from the polygon mirror; and
a frame to which the light source, the deflector and the scanning optical system are fixed, the frame comprising:
a base wall on which the deflector is mounted;
a first wall extending from the base wall toward one side in the first direction;
a crossing wall extending in a direction crossing the first direction from the first wall;
a second wall extending toward another side in the first direction from the crossing wall; and
a boss provided on the crossing wall for positioning of the scanning optical device relative to the main body, the boss protruding from the crossing wall.