Patent ID: 8380103

Claim:
An electrophotographic image forming apparatus comprising: a main body defining a sheet conveying path in which a recording sheet is conveyed, the main body including: a first wall and a second wall disposed opposite the first wall, the first wall including a reference surface; a force transmitting device configured to transmit a drive force; a pressing device disposed opposite the reference surface of the first wall; a cover attached to the main body, the cover being configured to pivot between an open position and a closed position; and a photosensitive member unit configured to move between an operational position in which the photosensitive member unit is stored in the main body and an image is ready to be formed and an outer position in which a portion of the photosensitive member unit extends out of the main body, the photosensitive member unit including: a first side frame facing the first wall of the main body when the photosensitive member unit is in the operational position; a second side frame facing the second wall of the main body when the photosensitive member unit is in the operational position; a plurality of photosensitive members each extending between the first and second side frames and arranged in tandem between the first and second side frames, each of the photosensitive members being configured to carry a toner image thereon; and a force receiving device disposed in the first side frame, the force receiving device being configured to engage the force transmitting device when the photosensitive member unit is in the operational position, and to receive the drive force from the force transmitting device; wherein when the photosensitive member unit moves from the outer position toward the operational position, the photosensitive member unit stops at a particular position located between the outer position and the operational position, wherein the reference surface of the first wall of the main body contacts the photosensitive member unit located in the operational position, wherein the pressing device of the main body is configured to press the photosensitive member unit toward the reference surface when the photosensitive member unit is located in the operational position, and wherein when the cover pivots from the open position to the closed position, the photosensitive member unit moves from the particular position, located between the outer position and the operational position, to the operational position.