Abstract: A developing cartridge has a casing accommodating toner therein; a developing roller rotatable about a first axis extending an axial direction; a cam electrically connected to the developing roller and rotatable about a second axis extending the axial direction from a first position to a second position, the cam being positioned at a third position distant from the casing by a first distance in the axial direction at the first position, and the cam being positioned at a fourth position distant from the casing by a second distance at the second position in the axial direction, the second distance being greater than the first distance; and a gear rotatable about the second axis, the gear engaging with the cam in a case where the cam is at the first position, and the gear disengaging from the cam in a case where the cam is at the second position.

Abstract: A developing cartridge includes: a casing; a developing roller; a developing electrode; a gear; a rack gear including a protrusion; and a cam having first and second cam surfaces. The rack gear meshes with the gear and is movable in a direction from one end toward another end of the casing. The cam is movable from a first position to a second position. The first cam surface of the cam at the first position contacts the protrusion, and causes the cam to move to the second position as the rack gear moves in the direction in a state where the first cam surface is in contact with the protrusion. A second cam surface moves the developing electrode in a direction away from the cam different from moving directions of the rack gear and the cam while contacting the developing electrode as the cam moves to the second position.

Abstract: A developing cartridge has a casing accommodating toner therein; a developing roller rotatable about a first axis extending an axial direction; a cam electrically connected to the developing roller and rotatable about a second axis extending the axial direction from a first position to a second position, the cam being positioned at a third position distant from the casing by a first distance in the axial direction at the first position, and the cam being positioned at a fourth position distant from the casing by a second distance at the second position in the axial direction, the second distance being greater than the first distance; and a gear rotatable about the second axis, the gear engaging with the cam in a case where the cam is at the first position, and the gear disengaging from the cam in a case where the cam is at the second position.

Abstract: An image forming apparatus includes: a frame; a plate including first and second electrical contact portions; and a developing cartridge detachably mountable to the frame. At least a portion of the first electrical contact portion is movable relative to the plate and separated farther from the plate than the second electrical contact portion The developing cartridge includes: a storage medium and a pressing portion. The storage medium includes first and second electrical contact surfaces. The pressing portion is configured to press the first electrical contact surface toward the first electrical contact portion to bring the first electrical contact surface into contact with the first electrical contact portion and to press the second electrical contact surface toward the second electrical contact portion to bring the second electrical contact surface into contact with the second electrical contact portion in a state where the developing cartridge is mounted to the frame.

Abstract: In a developing cartridge, a tubular member is rotatable about an axis. The tubular member includes a protrusion extending along a portion of a peripheral surface of a shaft. The relay member is positioned between a gear and the tubular member. The relay member is movable in an axial direction of the shaft during rotation of the gear from a first rotational position to a second rotational position. In a case where the gear is at the first rotational position, the gear and the relay member engage with each other and the relay member and the tubular member engage with each other to rotate the tubular member. In a case where the gear is at the second rotational position, the engagement between the gear and the relay member or the engagement between the relay member and the tubular member is released.

Abstract: In a cartridge, a developing roller is configured to rotate around a first rotational axis extending in a predetermined direction and to carry developer thereon, the developing roller having a first end and a second end apart from each other in the predetermined direction, a from-first-to-second direction being defined along the predetermined direction as being directed from the first end to the second end. A developing electrode is formed of a conductive material and is configured to be electrically connected to the developing roller, the developing electrode including a main part and a protruding portion protruding from the main part in the from-first-to-second direction. A detection body is formed of an insulating material and is rotatably supported by the protruding portion, the detection body including a first opening that exposes part of the protruding portion and a covering portion covering part of the protruding portion.

Abstract: A process cartridge including: a photosensitive member cartridge including a photosensitive member; and a developing cartridge including a developer carrier. The developing cartridge further includes: an inputting portion; a first cover; and a second cover. The first cover has a first engagement portion configured to move the developer carrier away from the photosensitive member. The first engagement portion is positioned between an axis of the developer carrier extending in an axial direction and an axis of the inputting portion extending in the axial direction, when projected in the axial direction. The second cover has a second engagement portion configured to move the developer carrier away from the photosensitive member. The second engagement portion is positioned between the axis of the developer carrier and the axis of the inputting portion, when projected in the axial direction.

Abstract: A developing cartridge includes: a first gear; a second gear; a gear cover; and a protrusion. The first gear is rotatable about a first axis extending in a predetermined direction. The first gear is movable from a first position to a second position. The second gear is rotatable about a second axis extending in the predetermined direction upon receipt of a drive force from the first gear. The gear cover has an opening and covers at least a portion of the second gear. The protrusion extends in the predetermined direction. The protrusion is movable with the rotation of the second gear while the first gear moves from the first position to the second position. The protrusion is further movable past the opening at least once after the protrusion moves past the opening once, while the protrusion moves with the rotation of the second gear.

Abstract: A developing cartridge includes: a casing configured to store developer; a developing roller configured to rotate about a first axis extending in a first direction; a shaft provided at one end of the casing in the first direction; and an electrode configured to rotate about the shaft and supply power to the developing roller. The shaft extends in the first direction and has a peripheral surface. The electrode has a first protrusion configured to rotate together with the electrode, the first protrusion extending along a portion of the peripheral surface of the shaft. The electrode has a second protrusion extending along the peripheral surface of the shaft, the second protrusion being spaced apart from the first protrusion in the rotating direction. The first protrusion has a first length in the rotating direction, and the second protrusion has a second length different from the first length in the rotating direction.

Abstract: A developing cartridge may include: a casing for accommodating developer therein; a developing roller rotatable about an axis extending in a first direction and positioned at one side of the casing in a second direction; a storage medium having an electric contact surface; and a holder movable relative to the casing in the second direction with the electric contact surface between a first position and a second position, the holder having an outer surface at which the electric contact surface is positioned.

Abstract: A developing cartridge includes a casing to accommodate toner; an agitator to agitate the toner and rotatable about a first axis extending in a predetermined direction, the agitator including one end portion and another end portion in the predetermined direction, the agitator being movable in the predetermined direction between a first position and a second position; a first gear mounted to the one end portion and rotatable along with the agitator; an input gear engaging with the first gear; a second gear mounted to the another end portion and rotatable along with the agitator; a third gear; and a protrusion. The second gear is mounted to the another end portion while the first gear engages with the input gear in the first position. And the second gear is separated from the another end portion while the first gear engages with the input gear in the second position.

Abstract: In a cartridge, a housing has a developer accommodating portion and includes a first side wall and a second side wall. A coupling member is disposed at a position opposite to the developer accommodating portion with respect to the first side wall. A detection body is disposed at a position opposite to the developer accommodating portion with respect to the second side wall. A first driving force transmission member is positioned at the same side with the coupling member with respect to the first side wall, and transmits driving force from the coupling member to a rotating member. A second driving force transmission member is positioned at the same side with the detection body with respect to the second side wall, and transmits driving force from the rotating member to the detection body.

Abstract: In a developing cartridge, a tubular member is rotatable about an axis. The tubular member includes a protrusion extending along a portion of a peripheral surface of a shaft. The relay member is positioned between a gear and the tubular member. The relay member is movable in an axial direction of the shaft during rotation of the gear from a first rotational position to a second rotational position. In a case where the gear is at the first rotational position, the gear and the relay member engage with each other and the relay member and the tubular member engage with each other to rotate the tubular member. In a case where the gear is at the second rotational position, the engagement between the gear and the relay member or the engagement between the relay member and the tubular member is released.

Abstract: A developing cartridge includes a casing, a developing roller, a shaft, a tubular member, an elastic member, and a gear. The tubular member is rotatable about the shaft and is movable from a first position and a second position. The tubular member at the second position is farther from an outer surface of the casing in an axial direction than at the first position. The gear is rotatable about the shaft from a first rotational position to a second rotational position. In case where the gear is at the first rotational position, the gear engages with the tubular member and the tubular member is rotatable together with the gear at the first position. In a case where the gear is at the second rotational position, the engagement of the gear with the tubular member is released and the tubular member stops rotating at the second position.

Abstract: A developing cartridge attachable to an image forming apparatus includes a developing roller, a housing, and a storage medium. The developing roller may be rotatable about a first axis extending in a first direction. The housing may be pivotable between a first position and a second position with respect to the image forming apparatus in a state where the developing roller is positioned at one end portion of the housing and the developing cartridge is attached to the image forming apparatus. The storage medium may include an electric contact surface. The electric contact surface may be out of contact with an electric connector of the image forming apparatus in a state where the housing is at the first position, the electric contact surface being in contact with the electric connector of the image forming apparatus in a state where the housing is at the second position.

Abstract: A developing cartridge includes a housing, a developing roller, a lever, and a storage medium. The housing may be configured to store a developing agent. The developing roller may be rotatable about a first axis extending in a first direction. The storage medium may be swingable together with the lever in a swing direction. The storage medium may have an electric contact surface. The electric contact surface may be swingable between a retreat position and an advance position. The electric contact surface may be positioned at the retreat position when the lever is positioned at a first position. The electric contact surface may be positioned at the advance position in a case where the lever is positioned at a second position. The housing may be movable in the second direction relative to the lever and the electric contact surface in a case where the electric contact surface is positioned at the advance position.

Abstract: A developing cartridge includes: a casing, a developing roller, a coupling, a coupling gear, a detection gear, an agitator, a first gear cover, a second gear cover, and a lock rib. The casing accommodates developing agent. The developing roller is rotatable about a first axis. The coupling and the coupling gear are rotatable about a second axis. The detection gear is rotatable about a third axis. The agitator agitates developing agent in the casing and performs power transmission from the coupling gear to the detection gear. The first gear cover covers at least the coupling gear. The second gear cover covers at least a portion of the detection gear. The lock rib is positioned at the other end of the casing. The lock rib is configured to be locked to a portion of a drum cartridge in a state where the developing cartridge is attached to the drum cartridge.

Abstract: A developer cartridge includes a casing and a developer container detachably attached to the casing. The developer container includes a tubular member, a conveyor, an end member, and a sealing member. The tubular member is configured to contain developer therein and has an axis. The conveyor is disposed in the tubular member and is configured to convey the developer toward one end of the tubular member along the axis. The end member is disposed at a predetermined distance away from the one end of the tubular member. The sealing member is attached to an outer peripheral surface of the end member and an outer peripheral surface of the tubular member, and is configured to be broken with rotation of at least one of the tubular member and the conveyor.

Abstract: A developing cartridge includes: a developing roller; a casing for accommodating therein developing agent; a storage medium including an electric contact surface; a holder movable along with the electric contact surface in a first direction crossing the electric contact surface, the holder being movable between a first position and a second position relative to the casing in the first direction; and a pressure member for pressing the holder while being moved in a second direction crossing the first direction when the holder is moved between the first position and the second position. A distance in the first direction between the electric contact surface and the pressure member when the holder is positioned at the first position is greater than a distance in the first direction between the electric contact surface and the pressure member when the holder is positioned at the second position.

Abstract: A process cartridge including: a photosensitive member cartridge including a photosensitive member; and a developing cartridge including a developer carrier. The developing cartridge further includes: an inputting portion; a first cover; and a second cover. The first cover has a first engagement portion configured to move the developer carrier away from the photosensitive member. The first engagement portion is positioned between an axis of the developer carrier extending in an axial direction and an axis of the inputting portion extending in the axial direction, when projected in the axial direction. The second cover has a second engagement portion configured to move the developer carrier away from the photosensitive member. The second engagement portion is positioned between the axis of the developer carrier and the axis of the inputting portion, when projected in the axial direction.