An apparatus body of an image forming apparatus has a first guide portion having an inlet shape corresponding to an outer shape of an engagement portion provided in a cartridge when seen in an attachment direction of the cartridge to the apparatus body and guiding the engagement portion, a second guide portion for guiding a positioning target portion which is provided on the cartridge for positioning an attachment completion position of the cartridge with respect to the apparatus body, and a movable member being at a regulation position at which a guiding path of the positioning target portion by the second guide portion is blocked is immovable from the regulation position unless being pressed by the engagement portion.

An image forming apparatus includes an apparatus main body, a process cartridge, a scanner unit, and a toner cartridge. The process cartridge is detachably mounted on the apparatus main body. The process cartridge includes: a photosensitive drum configured to rotate about a rotational axis extending in a first direction; and a development unit configured to supply toner to the photosensitive drum. The toner cartridge is configured to store toner. At least part of the photosensitive drum, at least part of the scanner unit, and at least part of the toner cartridge are aligned in a second direction in this order. The second direction is perpendicular to both the first direction and to a vertical direction. The at least part of the photosensitive drum, the at least part of the scanner unit, and the at least part of the toner cartridge overlap one another as viewed from the second direction.

A cartridge includes a rotatable member, a rotatable rotational force receiving member, a preventing member including an accommodating portion, a rotatable coupling member including a free end portion which includes a rotational force receiving portion and including a connecting portion connected with the preventing portion to be partly accommodated in the accommodating portion so that a rotational axis of the coupling member permits tilting thereof relative to a rotational axis of the rotational force receiving member, a shaft portion. The preventing member includes a supporting portion for supporting ends of the shaft portion so as to prevent the shaft portion from moving in a rotational direction of the rotatable member to transmit the rotational force received from the shaft portion via the supporting portion to the rotational force receiving member.

An image forming device, including: a housing; a drawer movable between an inside position at which the drawer is located inside the housing and an outside position at which the drawer is located outside the housing; a drum cartridge including a photoconductive drum and a developer roller and mountable on the drawer; and a toner cartridge storing toner to be supplied to the developer roller and mountable on the drawer, wherein the drum cartridge and the toner cartridge are mountable on the drawer in a state in which the drawer is located at the outside position, and wherein the drum cartridge and the toner cartridge are arranged in a drawer moving direction in which the drawer moves, in the state in which the drum cartridge and the toner cartridge are mounted on the drawer.

The present invention provides a developing cartridge, including a chip and conductive connecting pieces, provided on the developing cartridge, a cover of a printer is provided with chip contact heads, where one end of each of the conductive connecting pieces is connected to a chip terminal, and when the developing cartridge is inserted into the printer and the cover is closed, the other end of the conductive connecting piece contact with side surface of the chip contact head on the cover and squeezes the developing cartridge, preventing the developing cartridge from vibrating up and down during use.

In an image forming apparatus, a tray unit to which a cartridge is detachably mounted, and that is configured to be capable of moving between an internal position situated within the apparatus main body and an external position situated outside, includes first and second side plates configured to support the cartridge, and they are each made of metal, and include a supporting portion and an outer side portion, the supporting portions includes positioning portions configured to come into contact with the cartridge to position the cartridge as to an image forming position. The apparatus main body includes first and second pressing members each capable of moving between pressing positions at which the cartridge is pressed, and separated positions separated from the cartridge. The first and second pressing members are disposed each intersecting with imaginary planes that is orthogonal to the longitudinal direction and intersect the positioning portions.

An image forming apparatus includes an apparatus main body and a unit. The apparatus main body includes a positioning hole extending in a first direction intersecting with a mounting direction of the unit, and a pair of first inner edges extending in the first direction. The unit includes a sheet metal member and a positioning unit formed on a distal end side of the sheet metal member in the mounting direction. The sheet metal member includes a first surface extending along the mounting direction and a second surface located on an opposite side from the first surface. The positioning unit includes a projection piece inserted into the positioning hole, and a protrusion. The protrusion is formed by deforming the sheet metal member such that the second surface of the projection piece is partially perpendicular to the mounting direction and projects to a second direction perpendicular to the first direction.

A detachable unit has a unit housing and a grip portion thereon. The detachable unit is insertable and removal along an insertion/removal trajectory formed inside the body of an image forming apparatus and forming a depression angle as seen from the removal direction. The grip portion has a pressed face facing the upstream side of the unit housing in its removal direction and substantially perpendicular to the insertion/removal trajectory, a first side extending along the lower-end edge of the pressed face, and a second side extending along the upper-end edge of the pressed face. No face extending on the upstream side of the unit housing in the removal direction connects to the first side, and a finger insertion portion into which a finger can be inserted from the side of the first side along the pressed face is formed in the first side.

The present invention relates to a rotational force driving assembly and a process cartridge used for being engaged with a rotational force driving head inside an electrophotographic image forming device. The rotational force driving assembly can comprise a hub, a rotational force receiving component, a side plate, and an axis offset adjusting mechanism. When the axis offset adjusting mechanism is not subjected to external force, the axis offset adjusting mechanism enables the axis of the rotational force receiving component to be parallel and offset to the axis of the hub. When the axis offset adjusting mechanism is subjected to external force, the rotational force receiving component extends out to be engaged with the rotational force driving head.

A drum unit includes: a frame; a first photosensitive drum; a second photosensitive drum; a charger; and a storage medium. The frame includes: a first frame plate; a second frame plate spaced apart from the first frame plate in a first direction; a third frame plate connecting one end of the first frame plate to one end of the second frame plate; and a fourth frame plate connecting another end of the first frame plate to another end of the second frame plate. The first photosensitive drum and the second photosensitive drum are rotatably supported by the frame. The second photosensitive drum is spaced apart from the first photosensitive drum and positioned closer to the third frame plate than the first photosensitive drum to the third frame plate in a second direction. The storage medium has an electrical contact surface positioned at an outer surface of the fourth frame plate.