Patent ID: 8902268
Filing Date: 2014-12-02
Classification: G02B,G03G

Abstract:
1. An optical scanning apparatus including a light source configured to emit a light beam, a rotating polygonal mirror configured to deflect the light beam emitted from the light source so that a photosensitive member is scanned with the light beam, an optical member configured to guide the light beam deflected by the rotating polygonal mirror to the photosensitive member, and a casing accommodating the optical member therein, the optical scanning apparatus comprising: a supporting portion formed integrally with the casing inside the casing and supporting the optical member; a gap forming portion formed integrally with the casing inside the casing so a gap is formed between the optical member supported by the supporting portion and the gap forming portion; and a plate spring including a pressing portion configured to press the optical member, and a contact portion in contact with the gap forming portion, and configured to be elastically deformed so that a relative position between the pressing portion and the contact portion changes, and to cause the pressing portion to press the optical member toward the supporting portion by being fitted in the gap to be elastically deformed, wherein the gap forming portion is provided with a through hole and the plate spring is provided with an engaging portion configured to engage with an inner wall of the through hole, and the elastically deformed plate spring does not separate from the gap due to the engaging portion and the inner wall of the through hole engaging each other.