A printer 100 includes a housing, an image forming unit 120H, a body unit 150, positioning mechanisms and a lock lever 50. The positioning mechanism includes a unit biasing spring and a biasing projection, and positions the image forming unit 120H by biasing the image forming unit 120H mounted at a first position in the housing. The lock lever 50 is pivotably provided on the image forming unit 120H. The lock lever 50 can change the posture thereof between a first posture for locking the image forming unit 120H at the first position and a second posture for unlocking the image forming unit 120H and allowing the image forming unit 120H to be removed from the housing.

A developing cartridge includes a casing and a developing roller. The casing has an accommodation chamber, first and second ribs, a handle, and first and second pressure members. The accommodation chamber has one end portion and another end portion in a first direction, and an outer surface. The developing roller is positioned at one side of the accommodation chamber in a second direction. The ribs, the handle, and the pressure members are positioned at another side of the accommodation chamber in the second direction. The ribs and the pressure members are positioned at the outer surface. The handle is positioned between the first rib and the second rib in the first direction. The first pressure member is positioned between the handle and the first rib in the first direction. The second pressure member is positioned between the handle and the second rib in the first direction.

A printer 100 includes a housing, an image forming unit 120H, a body unit 150, positioning mechanisms and a lock lever 50. The positioning mechanism includes a unit biasing spring and a biasing projection, and positions the image forming unit 120H by biasing the image forming unit 120H mounted at a first position in the housing. The lock lever 50 is pivotably provided on the image forming unit 120H. The lock lever 50 can change the posture thereof between a first posture for locking the image forming unit 120H at the first position and a second posture for unlocking the image forming unit 120H and allowing the image forming unit 120H to be removed from the housing.

An imaging unit for an electrophotographic image forming device having positional control features for aligning the imaging unit in a supporting frame in the image forming device. The positional control features include on each end wall, first and second bullet noses and a stop arm positioned between the two bullet noses. The first and second bullet noses engage support or datum surfaces provided in corresponding openings in the frame. The stop arm receives a biasing force that rotates the imaging unit into its final operating position. A latching assembly is provided on one end wall to prevent the imaging unit from ejecting from the frame.

A developing device according to the present disclosure includes a developer container, a duct, a duct coupling portion and a handle portion, and is removable with respect to an image forming apparatus. The duct is formed in the developer container and sucks floating toner together with air within the developer container. The duct coupling portion is formed at an end of the duct and is coupled to a toner suction portion of the image forming apparatus. The handle portion is formed in the shape of a flat plate and is formed to protrude from immediately below the duct coupling portion in a horizontal direction. A hollow portion is formed within the handle portion. A through hole is formed in a portion of an upper surface of the handle portion that is protruded as compared with an opening surface of the duct coupling portion and communicates with the hollow portion.

Provided is an image forming apparatus, including a main body capable of attaching a cartridge thereto. The main body includes: a housing provided with an opening for allowing the cartridge to pass therethrough; and an opening/closing member capable of moving between a closed position and an open position. The opening/closing member includes a first cover portion that is opposed to an end surface of the cartridge on an upstream side in an attaching direction and a second cover portion that is opposed to a top surface of the cartridge on the upstream side when the opening/closing member is located at the closed position. The opening/closing member moves to the open position by rotating downward about a rotation axis provided at a lower end of the first cover portion when the opening/closing member is located at the closed position.

A developing device according to the present disclosure includes a developer container, a duct, a duct coupling portion and a handle portion, and is removable with respect to an image forming apparatus. The duct is formed in the developer container and sucks floating toner together with air within the developer container. The duct coupling portion is formed at an end of the duct and is coupled to a toner suction portion of the image forming apparatus. The handle portion is formed in the shape of a flat plate and is formed to protrude from immediately below the duct coupling portion in a horizontal direction. A hollow portion is formed within the handle portion. A through hole is formed in a portion of an upper surface of the handle portion that is protruded as compared with an opening surface of the duct coupling portion and communicates with the hollow portion.

A process unit includes a photosensitive drum rotatable about a rotational axis extending in a first direction. A development unit includes a development roller configured to supply toner to the photosensitive drum. A scanner unit is configured to expose the photosensitive drum. A reception portion is configured to receive toner from a toner container for supplying toner into the development unit. The scanner unit and the photosensitive drum overlap each other as viewed from a second direction perpendicular to the first direction and a gravitational direction. The scanner unit is arranged at a center in the first direction in an apparatus main body. The reception portion is arranged on a same side as the scanner unit with respect to the photosensitive drum in the second direction. The reception portion is closer to an end of the apparatus main body in the first direction than the scanner unit is.

An image forming apparatus includes a main housing, a movable drawer, and a process cartridge attachable to the drawer. The process cartridge includes a drum unit, and a developing unit. The drum unit includes a drum housing, and a photosensitive drum rotatable about a first axis extending in a first direction. The photosensitive drum is positioned at one end portion of the drum housing at one side in a second direction. The developing unit includes a developing casing, a developing roller, and a developing handle for detaching the process cartridge from the drawer toward another side in the second direction. The developing roller is positioned at one end portion of the developing casing at the one side in the second direction. The developing handle is positioned apart from the drum unit toward the another side in the second direction.

A cartridge attachable to/detachable from an apparatus main body of an image forming apparatus in a mounting direction, includes a storage portion storing toner, a stirring member rotating around a rotation axis and stirring the toner in the storage portion, and a gripping portion provided upstream of the storage portion in the mounting direction, wherein the gripping portion includes, when the cartridge is in a mounted orientation of being mounted in the apparatus main body, a concave portion whose an upper part is opened, the concave portion including a bottom surface and first and second walls extending upward from an upstream and a downstream of the bottom surface in the mounting direction, the concave part including an opening extended from the bottom surface to the first wall at a center in the longitudinal direction, and wherein the gripping portion includes a third wall facing the second wall through the opening.