US 11,703,776 B2
Light deflector, light scanning apparatus and image forming apparatus
Takatoshi Tanaka, Shizuoka (JP); Yoshihiko Tanaka, Shizuoka (JP); and Naoki Matsushita, Shizuoka (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 2, 2021, as Appl. No. 17/517,221.
Claims priority of application No. 2020-185008 (JP), filed on Nov. 5, 2020.
Prior Publication US 2022/0137528 A1, May 5, 2022
Int. Cl. G03G 15/04 (2006.01); G02B 26/12 (2006.01)
CPC G03G 15/04036 (2013.01) [G02B 26/121 (2013.01); G03G 15/0409 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A light deflector comprising:
a rotary polygon mirror including a plurality of reflecting surfaces configured to reflect light emitted from a light source and a hole portion provided at a center of rotation along a rotational axis direction of the rotary polygon mirror; and
a motor configured to rotate the rotary polygon mirror,
wherein the motor includes a shaft portion inserted into the hole portion and a support member configured to support the rotary polygon mirror in the rotational axis direction,
wherein the support member is fixed to the shaft portion, is coaxial with the shaft portion, and includes an insertion portion inserted into the hole portion with the shaft portion,
wherein the rotary polygon mirror further includes a protruded portion in a vicinity of the hole portion,
wherein, with respect to the rotational axis direction, the protruded portion of the rotary polygon mirror is protruded from at least one surface of the rotary polygon mirror orthogonal to the rotational axis direction,
wherein the protruded portion includes a fitting portion in which a portion continued from a surface forming the hole portion is protruded toward the center of the rotation more than the surface forming the hole portion, and is fitted to the shaft portion or the support member, and
wherein, with respect to the rotational axis direction, the fitting portion is provided in an area outside an area where the plurality of reflecting surfaces are provided.