Patent ID: 8855530

Claim:
An image forming apparatus comprising a main casing; a retaining unit configured to retain a plurality of photosensitive drums juxtaposedly arrayed with and spaced away from each other in a predetermined direction, the retaining unit being movable in the predetermined direction between an internal position within the main casing and an external position outside of the main casing, each of the plurality of photosensitive drums being movably supported on the retaining unit in a vertical direction and including a pressed portion; an endless belt disposed above the retaining unit that is in the internal position; and a moving member including a plurality of pressing portions each of which presses the pressed portion of a corresponding one of the plurality of photosensitive drums, the moving member being configured to be moved between a contact position and a separated position when the retaining unit is in the internal position, each of the plurality of pressing portions exerting upward pressure on the corresponding one of the plurality of photosensitive drums to bring the corresponding one of the plurality of photosensitive drums into contact with the endless belt when the moving member is in the contact position, each of the plurality of pressing portions releasing the upward pressure on the corresponding one of the plurality of photosensitive drums to separate the corresponding one of the plurality of photosensitive drums from the endless belt when the moving member is in the separated position, wherein the moving member is provided inside the retaining unit wherein each of the plurality of photosensitive drums has an axis extending in an axial direction and end portions in the axial direction, wherein the retaining unit includes a pair of side plate portions each of which is located on each of the end portions, each of the pair of side plate portions including a plurality of receiving portions each of which configured to receive the corresponding one of the plurality of photosensitive drums to be movable in the vertical direction, wherein each of the pressed portions protrudes outward from a corresponding one of the plurality of receiving portions in the axial direction, wherein the moving member is configured to exert upward pressure on the pressed portions of the plurality of photosensitive drums when the moving member is in the contact position, wherein each of the pair of side plate portions includes a first plate formed with the plurality of receiving portions and a second plate located outward of the first plate, and wherein the moving member is located between the first plate and the second plate.