A process cartridge is detachably mountable to a main assembly of an electrophotographic image forming apparatus. The cartridge includes an electrophotographic photosensitive drum, a developing roller, a drum unit containing the drum, a developing unit containing the roller and being movable so the roller contacts and is spaced from the drum, and a first force receiver receiving a force from a main-assembly first force applier by movement of a door from open to closed positions when mounting the cartridge and a second force receiver movable from a stand-by position by movement of the first force receiver by a force received from the first force applier. The second force receiver takes a projected position receiving a force from the second force applier to move the developing unit so the roller moves out of contact with the drum, the projected position being higher than the stand-by position.

The present disclosure provides a printer and integrated light source module thereof, comprising a chassis, a light source integration module, and a cover assembly. A receptacle within the chassis facilitates the placement of the light source integration module. This module comprises a photosensitive component, a light source component, and several toner cartridges. The light source component is positioned amidst the spaces of these toner cartridges. The cover assembly is affixed to the chassis, sealing the receptacle of the chassis and situated atop the aforementioned toner cartridges. The present invention is characterized by its integrated design, where the light source component is situated within the assembly gap between the photosensitive component and the toner cartridges, thereby forming an easily assembled and disassembled light source integration module. This innovation enhances the internal structural design of the printer, facilitating assembly, maintenance, and disassembly.

An image formation apparatus according to an embodiment may include: an exposure unit configured, when a cover member is opened from a closed position to an open position, to move from a first position to a second position with respect to the cover member; and a lock mechanism. When the cover member is in the open position, the exposure unit is movable between the second position and a third position in which the angle of the exposure unit relative to the cover member is different from that in the second position. The lock mechanism locks a position of the exposure unit when the exposure unit is in the third position. The lock mechanism releases the lock of the position of the exposure unit, when the cover member is moved from the open position to the closed position in the state where the exposure unit is in the third position.

An image forming apparatus includes a body housing, an opening and closing unit, an image carrier, a transfer roller, a power supply line, a power supply line side contact and a transfer roller side contact. The body housing has an opening. The opening and closing unit can be opened and closed in the opening. The image carrier is provided in the body housing. The transfer roller is provided in the opening and closing unit. The power supply line includes a first contact, and a second contact. The opening and closing unit includes a contact portion which comes into contact with the second contact and moves the second contact. The contact portion makes the second contact come into contact with the first contact when the opening and closing unit is closed, and makes the second contact separate from the first contact when the opening and closing unit is opened.

An image forming apparatus includes an apparatus body, a detachable unit detachably attached to the apparatus body, a metal plate component, an insertion cover, and a stopper. The insertion cover has an insertion opening into which the detachable unit is insertable in an insertion direction. The stopper includes a blocking projection and a contact. The blocking projection is inside the insertion opening of the insertion cover. The blocking projection has a shape that matches with a groove of the detachable unit compatible with the apparatus body and does not match with a groove of the detachable unit incompatible with the apparatus body. The contact contacts the metal plate component in a direction orthogonal to the insertion direction.

A cover is turned in a closing direction, and thus a first pressing portion starts to press a unit-side reception portion, after a contact point of a hook portion with a boss portion passes through the lowest point of the boss portion, a second pressing portion starts to press a hook-side reception portion, and the hook portion engages with the boss portion, until the cover reaches a closed position, the unit-side reception portion is separated from the first pressing portion and the turning of the cover in the closing direction is continued, and thus the second pressing portion rides over the hook-side reception portion to release the pressing of the hook-side reception portion performed by the second pressing portion.

An image forming apparatus includes an image forming unit, a casing, a door, a connecting member, a guide member, and an operating portion. The operating portion moves, through an operation by a user when the door is at a first opened position, from a regulating position where the connecting member is regulated from moving from a first guide to a second guide, to an allowing position where the connecting member is allowed to move from the first guide to the second guide. When the operating portion is at the regulating position, the door is configured to be retained at the first opened position by engagement of the connecting member and the first guide. When the operating portion is at the allowing position, the door is configured to be retained at the second opened position by movement of the connecting member from the first guide to the second guide.

A medium transport apparatus includes an apparatus body provided with a medium transport path, first and second components disposed in the apparatus body, a first cover covering a first area in which the first component is housed, a second cover covering a second area in which the second component is housed, a first coupling portion coupling both covers, and a second coupling portion coupling the apparatus body and the second cover. The second cover has a wall portion located between the first and second areas in a state where the first cover opened and the second cover are closed. In a state where the first cover is opened, the first component is attachable and detachable while the wall portion restricts access to the second area. In a state where the second cover is opened, the first component and the second component are attachable and detachable.

A sheet conveying device includes a body, a first guide in the body, a cover, a second guide in the cover, a detector, and a positioner. The first and second guides form a conveyance path at a closed state of the cover. The detector detects a sheet in the conveyance path and includes a photosensor in the body and a feeler in the cover. The feeler includes a detected portion movable in conjunction with the sheet passing through the conveyance path and a contacted portion. The photosensor has a detection region in which the detected portion entering the detection region is detected. The positioner in the body contacts the contacted portion to position the detected portion in the detection region.

An image forming apparatus includes an apparatus body provided with an opening portion, an opening/closing member, a fixing unit, a unit configured to be attached to and detached from the apparatus body through the opening portion, and a control unit configured to execute a predetermined initializing operation based on a movement of the opening/closing member from the open position to the closed position, in a case where the control unit detects a movement of the fixing unit during a period from a movement of the opening/closing member from the closed position to the open position to the movement of the opening/closing member from the open position to the closed position, and not execute the predetermined initializing operation even if the opening/closing member is moved to the closed position, in a case where the control unit does not detect the movement of the fixing unit during the period.