US 12,443,124 B2
Optical scanning device and image forming apparatus mounted with it
Jun Nagatoshi, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 5, 2024, as Appl. No. 18/596,336.
Claims priority of application No. 2023-034317 (JP), filed on Mar. 7, 2023.
Prior Publication US 2024/0302767 A1, Sep. 12, 2024
Int. Cl. G03G 15/04 (2006.01); G02B 26/12 (2006.01); G03G 15/043 (2006.01)
CPC G03G 15/0435 (2013.01) [G02B 26/12 (2013.01); G03G 15/0409 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An optical scanning device comprising:
a light source;
a deflection unit configured to deflect a light beam emitted from the light source;
a casing including a bottom portion on which the deflection unit is disposed and a side wall stood from the bottom portion;
a circuit board provided on the side wall in a state of being exposed to an outside of the casing and mounted with a plurality of electric elements for driving the light source; and
a cover member configured to close an opening, formed by the side wall, of the casing,
wherein the side wall includes a first side wall provided with the circuit board and a second side wall parallel to a direction perpendicular to a plane of the circuit board,
wherein the second side wall includes a through hole elongated in the direction perpendicular to the plane, a first side surface of the through hole forming a side close to the circuit board, and a second side surface of the through hole forming a side far from the circuit board,
wherein the cover member includes a protective portion for protecting the circuit board in a state in which the cover member closes the opening, and a restricted portion disposed in a position corresponding to the through hole in the state in which the cover member closes the opening, the restricted portion including a first end portion closed to the first side surface and a second end portion closed to the second side surface,
wherein the restricted portion includes a first insertion portion provided adjacent to the first end portion and inserted into the through hole when the cover member is assembled to the casing, and a second insertion portion provided adjacent to the second end portion and inserted into the through hole when the cover member is assembled to the casing, and
wherein a distance between the second end portion and the second side surface in the direction perpendicular to the plane is smaller than a distance between the protective portion and a closest electric element of the plurality of electric elements to the protective portion in a state in which the first insertion portion and the second insertion portion are inserted into the through hole.