Patent ID: 8717398

Claim:
An image forming apparatus comprising: A photosensitive drum defining an axis line; an exposure unit including: a recess, a plurality of light emitting elements aligned along a first direction parallel to the axis line of the photosensitive drum, a first end portion, and a second end portion opposite to the first end portion in the first direction, the exposure unit facing the photosensitive drum in a second direction perpendicular to the first direction and being configured to expose the photosensitive drum; a first frame provided adjacent to the first end portion of the exposure unit and has a contact portion configured to position the exposure unit in the first direction, the contact portion being in contact with the first end portion of the exposure unit in the first direction parallel to the axis line of the photosensitive drum; a second frame provided adjacent to the second end portion of the exposure unit, the exposure unit being disposed between the first frame and the second frame in the first direction parallel to the axis line of the photosensitive drum; and a plate spring provided on the first frame, the plate spring including a pressing portion which presses the first end portion of the exposure unit against the contact portion, the plate spring having a fixed portion which is fixed to the first frame and engaging the recess of the exposure unit and pulling the first end portion of the exposure unit toward the contact portion along the first direction from the second end portion of the exposure unit toward the first end portion of the exposure unit.