Optical scanning apparatus and image forming apparatus including optical scanning apparatus

摘要

At the time of forming an image, a rise in a temperature of a drive motor generates distortion in a bottom of a optical box of an optical scanning apparatus. If an opening is formed on the optical box to release heat, the optical box becomes easily distorted. To solve such a problem, according to the present invention, the optical scanning apparatus includes a rib which crosses over the opening formed at the bottom of the optical box.

主权项

1. An optical scanning apparatus comprising:
a light source to emit a light beam; a rotational polygon mirror configured to deflect the light beam so the deflected light beam scans a photosensitive member; a motor configured to drive the rotational polygonal mirror; a bearing configured to bear a rotational shaft of the motor; an optical box on which an opening is formed and in which the rotational polygon mirror, the motor and the bearing are disposed, the bearing being inserted into the opening, and a gap being formed between the bearing and the optical box into which the bearing is inserted; and a connecting portion integral with the optical box and extending across the opening, wherein a portion of the connecting portion that extends across the opening is opposed to an end face of the bearing.