Patent ID: 8836745

Claim:
An image forming apparatus for forming an image on a recording medium, the image forming apparatus comprising: an image bearing member; an exposure device including a plurality of light emitting elements arrayed along a longitudinal direction of the image bearing member so as to expose with light different positions of the image bearing member in the longitudinal direction; first positioning members provided at both longitudinal end portions of the exposure device, and configured to position the exposure device relative to the image bearing member at both longitudinal end portions, respectively; a first elastic member configured to urge the exposure device toward the image bearing member so as to maintain a positioned state of the first positioning members; a holding member configured to hold the exposure device at a mounting portion between the first positioning members provided at both longitudinal end portions of the exposure device; a second positioning member provided on the holding member, and configured to position the holding member relative to the image bearing member so as to position the exposure device relative to the image bearing member at the mounting portion; a second elastic member configured to urge the holding member toward the image bearing member so as to maintain a positioned state of the second positioning member, a first adjusting member configured to adjust, by the first positioning members, a distance in a direction of an optical axis between the image bearing member and the exposure device at both longitudinal end portions of the exposure device; and a second adjusting member configured to adjust, by the second positioning member, a distance in the direction of the optical axis between the image bearing member and the exposure device at the mounting portion of the exposure device, wherein the holding member has a rigidity necessary to curve the exposure device in the longitudinal direction when the second adjusting member adjusts, by the second positioning member, the distance in the direction of the optical axis between the image bearing member and the exposure device at the mounting portion of the exposure device.