Patent ID: 9733613
Date: 2017-08-15
CPC Classifications: G03G

Claim:
1. An image forming apparatus comprising: a main casing; a process cartridge including a photosensitive drum; a belt unit including a belt and configured to move between a contact position, at which the belt contacts the photosensitive drum, and a separated position, at which the belt is separate from the photosensitive drum; a drawer configured to support the process cartridge and move in a sliding direction between an internal position inside of the main casing and an external position outside of the main casing, the sliding direction being perpendicular to an axial direction of the photosensitive drum; an exposure unit configured to expose the photosensitive drum to light, the exposure unit being disposed such that when the drawer supporting the process cartridge is in the internal position, the belt unit, the process cartridge, and the exposure unit are arranged in this order in a first direction such that the belt unit is positioned at an upstream side of the process cartridge in the first direction and the exposure unit is positioned at a downstream side of the process cartridge in the first direction; a positioning member configured such that the photosensitive drum is engaged to the positioning member from an upstream side of the positioning member in the first direction so as to be positioned by the positioning member; and a pressing member configured to press the process cartridge from the upstream side toward the downstream side of the process cartridge in the first direction so as to position the photosensitive drum relative to the positioning member, the pressing member being configured to move between a first position, at which the pressing member presses the process cartridge, and a second position, at which pressing of the pressing member to the process cartridge is released.