Patent ID: 11874626
Assignee: BROTHER KOGYO KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An image forming apparatus comprising:
a housing having an opening;
a drawer movable through the opening between:
an inner position where the drawer is accommodated within the housing; and
an outer position where a portion of the drawer is exposed to an outside of the housing;
a drum cartridge attachable to and detachable from the drawer, the drum cartridge comprising
a photosensitive drum having a first end portion and a second end portion, and
a drum frame supporting the photosensitive drum, the drum frame comprising
a first side frame having an upper end portion, and a lower end portion supporting the first end portion of the photosensitive drum,
a second side frame having an upper end portion, and a lower end portion supporting the second end portion of the photosensitive drum, and
an upper frame connecting the upper end portion of the first side frame and the upper end portion of the second side frame to each other; and

a developing cartridge attachable to and detachable from the drum frame, the developing cartridge comprising
a developing roller having a first end portion and a second end portion;
a handle, a portion of the handle being positioned above the upper frame in a state where the drum cartridge to which the developing cartridge has been attached is attached to the drawer, and
a developing frame supporting the developing roller, the developing frame comprising
a first side frame supporting the first end portion of the developing roller,
a second side frame supporting the second end portion of the developing roller, and
a protrusion provided at the first side frame of the developing frame, the protrusion extending from the first side frame of the developing frame in a direction away from the second side frame of the developing frame, the protrusion being configured to engage with a portion of the drum cartridge in a state where the developing cartridge is attached to the drum frame.