Image forming apparatus

An image forming apparatus comprising:

• a housing having an opening;
• a cover configured to cover the opening and being movable between a closed position at which the cover covers the opening and an opened position at which the opening is opened;
• a developing cartridge including a developing roller and a developing frame having a toner accommodation chamber configured to accommodate therein toner;
• a drum cartridge including a drum frame, to which the developing cartridge is detachably mountable, a photosensitive drum, a pressing member configured to press the developing roller to the photosensitive drum in a state where the developing cartridge is mounted to the drum frame, and a lock lever configured to lock the developing cartridge to the drum frame and releasing the lock based on a manual operation, the drum cartridge being mountable to an inside of the housing in a state where the developing cartridge is mounted to the drum cartridge;
• an arm arranged to be engageable with the lock lever;
• a slide guide configured to guide sliding of the arm;
• and
• a link configured to couple the arm to the cover,
• wherein the link is rotatably coupled to the arm and the cover,
• wherein in a state where the cover moves from the closed position to the opened position, the lock lever moves from a locked position at which the developing cartridge is prevented from being demounted from the drum frame to a non-locked position at which the developing cartridge is allowed to be demountable from the drum frame,
• wherein the cover opens the opening by swinging about a first swinging axis, and
• wherein the arm is coupled to the cover and moves the lock lever from the locked position to the non-locked position in a state where the cover moves from the closed position to the opened position.