A processing cartridge, detachably installed in an electronic image forming device that includes a first pushing element and a second pushing element. The processing cartridge includes a developing roller and a first housing supporting the developing roller; a photo-sensitive drum and a second housing supporting the photo-sensitive drum; a first force receiving element, configured to be abutted against the second pushing element to separate the developing roller from the photo-sensitive drum; and a second force receiving element, configured to be abutted against the first pushing element for enabling the second force receiving element to push the first force receiving element to rotate about an axis. A rotation axis of the first force receiving portion is substantially perpendicular to a direction in which the processing cartridge is installed into or taken out of the electronic image forming device.

An image-forming apparatus includes: a main casing; a drawer movable in a first direction relative to the main casing; a process cartridge detachably mountable on the drawer; and a toner cartridge. The drawer includes a first drawer side plate and a second drawer side plate spaced apart from each other in a second direction crossing the first direction. The process cartridge includes: a photosensitive drum rotatable about an axis extending in the second direction when the process cartridge is mounted on the drawer; and a developing device for supplying toner to the photosensitive drum. When the process cartridge is mounted on the drawer and the toner cartridge is attached to the process cartridge, the toner cartridge has a length in the second direction greater than a distance in the second direction between the first drawer side plate and the second drawer side plate.

An image forming apparatus includes: a first guide that is provided in an apparatus housing and configured to suspend and hold a first unit including an image holder so that the first unit is movable in an insertion and removal direction; a second guide that is provided in the apparatus housing and configured to suspend and hold a second unit including a developer holder so that the second unit is movable in an insertion and removal direction; and a pedestal that is disposed on a front side in the insertion and removal direction with respect to the first guide and the second guide, supports, from below in a gravity direction, the first unit and the second unit while the first unit and the second unit are inserted into the apparatus housing, and does not contact with the first unit and the second unit located in the apparatus housing.

A developing cartridge may include a developing roller, a casing capable of containing a developer therein, a developing electrode movable with the casing and the developing roller and pivotable about a developing roller shaft of the developing roller in a direction, a first lever movable relative to the casing, and a holder configured to hold the first lever relative to the casing, in case where the developing electrode pivots from one side of the direction to an other side of the direction, the first lever stops the pivotable movement of the developing electrode from one side of the direction to the other side of the direction and the holder prevents the first lever from coming off the holder from the one side of the direction to the other side of the direction.

An image forming apparatus includes a cartridge including a portion-to-be-positioned, and an apparatus main body on which the cartridge is mounted in a mounting direction. The apparatus main body includes a positioning portion and a regulating portion. The positioning portion positions the cartridge by engaging with the portion-to-be-positioned. The regulating portion is provided on an upstream side of the positioning portion in the mounting direction. The cartridge includes a portion-to-be-regulated provided on an upstream side of the portion-to-be-positioned in the mounting direction. The portion-to-be-positioned engages with the regulating portion before engaging with the positioning portion, to regulate movement of the cartridge in the direction orthogonal to the mounting direction. The portion-to-be-regulated engages with the regulating portion before the portion-to-be-positioned engages with the positioning portion, to regulate movement of the cartridge in the direction orthogonal to the mounting direction.

In a cartridge assembly, a cartridge frame is configured to limit a movable amount of a photosensitive drum with respect to the frame in a longitudinal direction of the photosensitive drum to a first amount in the case where a cover member is apart from the frame, and the cover member has a held portion held by the frame and a limiting portion configured to limit the movable amount of the photosensitive drum with respect to the frame to a second amount smaller than the first amount by contacting with a longitudinal end surface of the photosensitive drum in the case where the photosensitive drum moves in the longitudinal direction when the cover member is mounted on the frame.

An image forming apparatus to form a toner image on a recording material includes a photosensitive member and an optical scanning unit. The optical scanning unit includes an optical scanning unit, an optical box, a cover member, and a moving unit movable to an outside of the image forming apparatus. The optical scanning unit and the moving unit are arranged so that the moving unit and the optical scanning unit are opposed to each other when the moving unit is located in an inside of the image forming apparatus. The optical scanning unit is disposed so as to allow a user to touch the optical scanning unit through a space generated in the inside of the image forming apparatus when the moving unit is moved to the outside of the image forming apparatus. Between the optical box and the cover member, the cover member is opposed to the moving unit.

A cassette drawing-in device includes a guide portion to guide a pin protruding from a paper feed cassette, a first member in which the guide portion is formed, a second member facing the first member, a first rotation shaft, a first link rotationally supported by the first rotation shaft, a second rotation shaft provided on the first link, a second link rotationally supported by the second rotation shaft and including an engagement groove which engages the pin and slides on the pin in a direction intersecting the moving direction of the pin, and a protruding portion on one or both of the first member and the second member within a range of movement of the second link that accompanies the rotation of the first link about the first rotation shaft.

An image forming apparatus includes a photosensitive drum and an apparatus main body, the apparatus main body includes a transfer roller exerting a transfer pressing force on the photosensitive drum, a positioning portion positioning the photosensitive drum in first and second directions by being contacted by a bearing portion holding a rotation axis of the photosensitive drum, the first direction being in a virtual plane perpendicular to the rotation axis, and the second direction being a direction intersecting the first direction, and a pressing member exerting a holding-and-pressing force pressing the bearing portion toward the positioning portion, and, in a state in which the bearing portion is in contact with the positioning portion, the holding-and-pressing force has a component force in the first direction, and the transfer pressing force has a component force in the second direction that is oriented to press the bearing portion toward the positioning portion.

An image forming apparatus includes a mounting portion for mounting a process cartridge, the process cartridge including a first unit having an image bearing drum, and a second unit having a developing roller, the second unit being movable between a contact position in which the roller contacts the drum and a spaced position in which they are mutually spaced; an engageable member engageable with a force receiving portion provided on the second unit; wherein the engageable member is movable between a first position for maintaining the second unit in the spaced position by engaging with the force receiving portion, a second position for permitting movement of the second unit from the spaced position to the contact position; and a third position for permitting the process cartridge to be mounted, by being pressed by the process cartridge to retract, when the process cartridge is mounted to the mounting portion.