Drum unit including photosensitive drum, drum frame, and pressure member pressing developing cartridge attached to drum frame toward photosensitive drum

A drum unit comprising:

• a photosensitive drum rotatable about a drum axis extending in a first direction;
• a drum frame to which a developing cartridge including a developing roller is attachable, the drum frame including:
• a guide frame positioned at one end portion in the first direction of the drum frame, the guide frame having a guide groove allowing a portion of the developing cartridge to be inserted therein;
• and
• a pressure member positioned at the guide frame at a position inward relative to the guide groove in the first direction, the pressure member being pivotally movable about a pressure axis extending in the first direction, the pressure member pressing the developing cartridge toward the photosensitive drum in a state where the developing cartridge is attached to the drum frame;
• wherein the developing cartridge further includes:
• a memory having an electrical contact surface,
• the drum unit further comprising:
• an electrical contact in contact with the electrical contact surface in a state where the developing cartridge is attached to the drum frame,
• wherein the pressure member is positioned inward relative to the electrical contact in the first direction.