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.

An image forming apparatus includes a body casing, a pressing member, a process cartridge, and a drawer. The body casing includes a positioning member. The pressing member is disposed inside the body casing. The process cartridge includes a photosensitive drum. The drawer is configured to support the process cartridge and to move, in a sliding direction orthogonal to an axis direction of the photosensitive drum, between an inside position that is a position inside the body casing and an outside position that is a position outside the body casing. The process cartridge includes an engagement portion and a spring. The engagement portion is configured to be positioned by the positioning member. The spring is configured to be pressed by the pressing member such that the engagement portion is pressed toward the positioning member.

An image forming apparatus includes a main body housing, a drawer, a drum cartridge and a toner cartridge. The drawer is movable in a first direction between an inner position at which the drawer is located inside the main body housing and an outer position at which the drawer is located outside the main body housing. The drum cartridge includes a photosensitive drum. The drum cartridge is attachable to and detachable from the drawer. The toner cartridge accommodates toner. When the drum cartridge is attached to the drawer and the drawer is at the inner position, the toner conveyor conveys toner from the toner cartridge to the drum cartridge.

In some examples, an apparatus can include a cartridge flange, and a grip structure including an inner surface to receive an expansion member included in an imaging device, where the expansion member is to expand from a first diameter to a second diameter to be received by the grip structure.

A replaceable unit for an electrophotographic image forming device includes a housing having a reservoir for holding toner. An electrical connector is positioned on a first side of the housing. The electrical connector includes an electrical contact for contacting a corresponding electrical contact in the image forming device. The electrical contact of the replaceable unit is electrically connected to processing circuitry mounted on the housing. The electrical connector is movable between a first position and a second position. The electrical contact of the replaceable unit moves outward from the first side of the housing along a side-to-side dimension of the housing when the electrical connector moves from the first position to the second position. The electrical contact of the replaceable unit faces downward when the electrical connector is in the second position permitting the corresponding electrical contact to contact the electrical contact of the replaceable unit from below.

An image forming apparatus includes a photosensitive member that is rotatable, a substrate, a lens array, a holder, and a conductive member provided on the holder. The substrate includes a plurality of light-emitting elements, a driver integrated circuit (IC), and a wiring pattern. The plurality of light-emitting elements is arrayed in a rotational axis direction of the photosensitive member to emit light to which a surface of the photosensitive member is exposed. The driver IC drives the plurality of light-emitting elements. The wiring pattern includes a supply line that supplies power to the driver IC and a ground wire that grounds the driver IC. The lens array collects the light emitted from the plurality of light-emitting elements on the photosensitive member. The holder holds the substrate and the lens array, is grounded, and is made of metal. The conductive member electrically connects the holder and the ground wire.

A drive transmission device includes a drive train including a plurality of drive transmitters, and a container. The plurality of drive transmitters of the drive train transmit a driving force of a drive source to a rotator rotatable around a shaft and a swing member rotatable around a shaft different from the shaft of the rotator. The container contains the drive train.

An assembly for an image forming device includes an access door movable between an open position permitting replacement of a replaceable unit and a closed position. An electrical connector in the image forming device is movable between a retracted position and an extended position. In the retracted position the electrical connector is disengaged from a corresponding electrical connector of the replaceable unit when the replaceable unit is installed in the image forming device. In the extended position the electrical connector is engaged with the corresponding electrical connector of the replaceable unit. The electrical connector is operatively connected to the access door such that movement of the access door from the closed to the open position moves the electrical connector from the extended to the retracted position and movement of the access door from the open to the closed position moves the electrical connector from the retracted to the extended position.

An image forming apparatus includes a first moving member moving between a first position which is a position not in contact with a recording material and a second position which is a position in contact with the recording material, and a second moving member positioned in a third position in a state where an attachable/detachable unit is not attached to an apparatus main body and in a fourth position in a state where the attachable/detachable unit is attached to the apparatus main body. An optical sensor includes a light-emitting portion and a light-receiving portion, and a flag member moves between a transmission position and a light-shielding position and moves in conjunction with movement of the first moving member from the first position to the second position and with a movement of the second moving member from the third position to the fourth position.

An image forming apparatus includes: a frame; a cover movable between a closed position and an open position; a fixing unit including a heating member and a pressure roller configured to form a nipping region therebetween; an adjustment mechanism configured to adjust a nipping pressure between the heating member and the pressure roller in conjunction with movement of the cover; and a link mechanism connected to both the adjustment mechanism and the cover. The adjustment mechanism includes an arm pressing the heating member such that the heating member and the pressure roller form the nipping region. The link mechanism includes: a first link connected to the cover; a second link connected to the first link and pivotally movable about an axis extending in a width direction; and a third link connected to both the second link and the adjustment mechanism. The third link is movable in a front-rear direction.