A cartridge configured to be attachable to an apparatus main body of an image forming apparatus includes a first unit including a photosensitive drum, a second unit attached to the first unit and including a developing roller, and a second frame member including a toner storage portion and including a toner reception port, the toner storage portion including a first end portion and a second end portion in a rotational axis direction of the photosensitive drum, the toner reception port provided in the first end portion, a toner container configured to be attachable to the second unit, the toner container including a toner discharge port configured to discharge the toner to the toner storage portion through the toner reception port, and a memory, the memory provided in an end portion of the cartridge on the same side as the second end portion of the toner storage portion.

A toner cartridge includes a casing, a developing roller, a holder, a toner memory, an electrical contact and a wiring. The holder is positioned at an outer surface of one side in a first direction of the casing. The electric contact surface is positioned at an outer surface of one side in a second direction of the holder. The second direction crosses the electric contact surface. The electrical contact is positioned on an outer surface of another side in the second direction of the holder. The wiring electrically connects the electrical contact and the electric contact surface. The electric contact surface includes a first electric contact surface and a second electric contact surface. The first electric contact surface electrically is connected to the electrical contact through the wiring. The second electric contact surface electrically is connected to the toner memory.

An image forming apparatus has a main casing including an opening provided at an upper portion of the main casing, a process cartridge attachable to the main casing through the opening, and a top cover movable between an open position where the top cover opens the opening and a close position where the top cover closes the opening. The process cartridge includes a photosensitive drum and a memory provided with a first electrical contact. The top cover supports an LED head configured to emit light to expose the photosensitive drum, and a second electrical contact electrically connected to the first electrical contact in a state where the process cartridge is attached to the main casing and in a state where the top cover is positioned at the close position.

A developer container includes a memory device with a first marker; and a main body with a second marker, the main body being configured to accommodate a developer. The memory device is attached to the main body such that both the first marker and the second marker are visually recognized.

A nondrive-side side member forms a part of a cartridge and includes a frame portion, and a regulation frame portion provided in the frame portion, to regulate movement of the cartridge. The frame portion has a hole provided to expose an electric contact. Further, a drive-side side member forms a part of a cartridge and includes a frame portion having a first hole and a second hole with a diameter larger than a diameter of the first hole, and a slit portion into which a memory for storing information is to be inserted.

Movement and/or urging of a developer carrying member is carried out with high precision.

A cartridge that is mountable to an apparatus main assembly of an image forming apparatus, the cartridge includes a developing roller; a frame supporting the developing roller; a movable part movably supported by the frame and movable to a first position and to a second position relative to the frame; and an elastic part provided between the frame and the movable part to urge the movable part. The movable part includes a first force receiving part that receives force from the apparatus main assembly, in a direction of moving from the first position to the second position, and a second force receiving part that receives force from the apparatus main assembly, in a direction of moving from the second position to the first position. When the movable part receives force from the apparatus main assembly at the first force receiving part and is at the second position, the movable part receives urging force from the elastic part in a direction of moving the movable part from the second position to the first position.

A photosensitive member cartridge detachably mountable to a main assembly of an image forming apparatus for forming an image, includes a frame; a photosensitive drum on which and which is provided in the frame; a transfer member for transferring an image formed on the drum onto the sheet; a mounting portion for detachably mounting a developing cartridge including a developer carrying member onto the drum and a memory for storing information; a first electrical contact provided on the frame and electrically connectable with a main assembly electrical contact provided in the main assembly when the cartridge is mounted to the main assembly; and a second electrical contact provided on the frame for electrically connecting the memory and the first electrical contact portion with each other when the developing cartridge is mounted to the mounting portion.

Disclosed in the present invention is a developing cartridge, which is detachably mounted in an image forming device, comprising: a housing; a developing roller rotatably supported by the housing, the developing roller rotating about an axis extending in a first direction; a supply roller rotatably supported by the housing and configured to convey a developer to the developing roller, the supply roller having a supply roller shaft made of metal; a driving gear disposed on a driving side of the housing in the first direction; and an electrode electrically connected to the developing roller shaft, comprising a first part, a second part, and an intermediate electrical connection part connecting the first part and the second part; wherein the first part is located on an opposite side of the driving side of the housing, the second part is located on the driving side of the housing, and the opposite side of the driving side and the driving side are opposite ends of the housing in the first direction; and the second part is simultaneously in contact with the supply roller shaft and the developing roller shaft.

A drum cartridge includes: a photosensitive drum rotatable about an axis extending in a first direction; a first drum frame to which a developing cartridge is attachable; and a second drum frame having an outer surface; and a memory having an electrical contact surface. The first drum frame is at one end portion of the drum cartridge in a second direction and the second drum frame is at another end portion of the drum cartridge in the second direction. The electrical contact surface is positioned at the outer surface of the second drum frame and is movable in a predetermined direction relative to the second drum frame.

An image forming apparatus includes a cartridge provided with a memory. The apparatus main body includes a frame, a movable electric contact unit including an electric contact portion contacting with the memory, and a holding member holding the electric contact portion and including an urging member urging the electric contact unit toward the memory in a mounted state of the cartridge, and a positioning portion positioning the electric contact unit in an unmounted state of the cartridge.