Abstract: A pair of side plate portions of a duct unit are formed to continue from an upstream plate portion to a downstream plate portion. A partition wall portion partitions a space between the pair of side plate portions into branch flow paths and the other area. A plurality of flow-out openings formed in the downstream plate portion are smaller, in area and width in a first direction, than flow-in openings formed in the upstream plate portion. The pair of side plate portions are formed to extend along edges of the flow-in openings and edges of the flow-out openings. The edges of each of the flow-in openings and the flow-out openings are opposite to each other in the first direction. An interval between the pair of side plate portions in the first direction becomes gradually narrower from upstream to downstream.

Abstract: An image forming apparatus includes an image forming unit configured to form an image; a holding portion configured to hold the image forming unit; a supporting portion configured to support the holding portion; a fastening portion configured to fasten the holding portion and the supporting portion to each other; and an arcuate slit portion provided in at least one of the holding portion and the supporting portion and extending substantially about the fastening portion in a range at least not less than 180° and less than 360° around the fastening portion.

Abstract: An image forming apparatus includes: a drum cartridge to which one of a first toner cartridge and a second toner cartridge is attachable; a frame including a first slot and a second slot; and a controller including a control memory and a processor. The drum cartridge to which the one of the first toner cartridge and the second toner cartridges is attached is attachable to one of the first slot and the second slot. The control memory stores first color information allocated to the first slot, and second color information allocated to the second slot. In a state where the drum cartridge is attached to one of the first slot and the second slot and when the drum memory does not store any color information, the processor is configured to perform: writing, into the drum memory, one of the first color information and the second color information which is appropriate.

Abstract: According to an embodiment, a heater includes a heat-resistant insulating substrate, a plurality of heat generating members arrayed on a first surface of the insulating substrate, and a heat radiating body disposed on a surface different from the first surface of the insulating substrate corresponding to gap portions among the plurality of heat generating members and configured to actively or passively radiate stored heat.

Abstract: A developing cartridge includes: a housing extending in a first direction; a developing roller; a memory held at the housing; a holder holding an electrical contact surface; and a relay component electrically connecting the memory to the electrical contact surface. The developing roller is rotatable about an axis extending in the first direction. The developing roller is positioned at one end portion of the housing in a second direction. The holder is movable relative to the housing in at least one of the second direction and a third direction crossing the first direction and the second direction. The third direction also crosses the electrical contact surface.

Abstract: An image forming apparatus includes a fixing unit and an apparatus main body. The fixing unit fixes a toner image on a sheet while conveying the sheet. In the apparatus main body, the fixing unit is removably attached. The fixing unit includes a unit side connection part. The apparatus main body includes a main body side connection part and a first adjustment mechanism. The main body side connection part is electrically connected with the unit side connection part. The first adjustment mechanism is used for adjusting an angle of the fixing unit with respect to the apparatus main body. The main body side connection part is arranged at a side of a supporting point of angle adjustment of the fixing unit by the first adjustment mechanism.

Abstract: An image-forming device includes a main casing, a belt accommodated in the main casing, developing units arranged along the belt, a drawer configured to detachably support the developing units, the drawer configured to move to a position inside the main casing and to a position outside the main casing, and the drawer having a leading end and a trailing end in a pulling direction from the inside position to the outside position; and a guide configured to guide the drawer and to move between a first position and a second position when the drawer is at the inside position, the second position being farther from the belt than the first position from the belt. When the guide is at the second position, the guide is configured to be tilted downward relative to a horizontal direction such that the leading end is lower than the trailing end.

Abstract: A toner cartridge includes a photoconductive drum and a boss that protrudes outward from a first longitudinal end of the toner cartridge at a rotational axis of the photoconductive drum. An outermost axial segment of the boss along the rotational axis includes a partial cylinder having a cross-sectional shape of a circular segment. An outer circumferential surface of the partial cylinder is convex to a bottom of the toner cartridge and forms a bottom contact surface of the boss that is unobstructed to contact and sit in a corresponding V-block in an image forming device when the toner cartridge is installed in the image forming device. The outermost axial segment of the boss includes clearance above a topmost portion of the partial cylinder and within the radius of the outer circumferential surface of the partial cylinder permitting the clearance to accommodate one or more features in the image forming device.

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 developer cartridge according to one aspect described herein is attachable to a photoconductor unit that comprises a photoconductive drum. The developer cartridge may comprise a main body having an opening, the main body comprising an electric circuit, a front cover configured to move to an opening position in which the opening of the main body is exposed and to a closing position in which the opening of the main body is closed, a first terminal electrically connected to the electric circuit, a photosensitive drum, and a developer cartridge comprising a developing roller, developing frame having a pressed portion, memory unit and second terminal. The front cover may include a pressing portion configured to press the pressed portion of the developing frame in a direction from the developing roller toward the photosensitive drum, and wherein the second terminal faces to the front cover when the front cover is in the closed position.

Abstract: A developing cartridge includes a casing, a rotating member, and an electrode member. The casing may be configured to accommodate therein developer. The rotating member has a rotational shaft extending in an axial direction. The rotating member is configured to rotate about the rotational shaft and carries the developer thereon. The electrode member is configured to be electrically connected to the rotating member. The electrode member covers at least part of the rotational shaft from an orthogonal direction orthogonal to the axial direction and is arranged to confront the casing in the axial direction. The electrode member is configured to move in the orthogonal direction in accordance with a movement in the axial direction.

Abstract: A white toner for electrostatic image development includes white toner particles containing a binder resin and a white pigment. When in a circularity distribution of the white pigment determined by sectional observation of the white toner particles, the cumulative 10% circularity from the smaller side is C10, and the cumulative 50% circularity is C50, the following formula (1) and formula (2) are satisfied. 0.900?C50?1.000??Formula (1): 1.00?C50/C10?1.

Abstract: The present disclosure provides a toner cartridge for an image forming apparatus, a developing cartridge including the toner cartridge, and the image forming apparatus. The toner cartridge includes a housing, the housing includes a toner chamber configured to store toner, and a developing roller is disposed at a rear side of the housing. The toner cartridge also includes a storage member disposed on a lower surface of the housing and configured to store information of the toner cartridge; and with respect to the rear side of the housing for disposing the developing roller, the storage member is located closer to a front side of the housing opposite to the rear side.

Abstract: A developing cartridge includes a developing electrode and a supply electrode. The developing electrode includes a first electrical contact in contact with a developing roller shaft, and a second electrical contact positioned closer to the developing roller shaft than a second agitator gear is to the developing roller shaft. The second electrical contact is positioned farther from the developing roller shaft than the first electrical contact is from the developing roller shaft. The supply electrode includes a first electrical contact in contact with the supply roller shaft, and a second electrical contact positioned closer to the developing roller shaft than the second agitator gear is to the developing roller shaft. The second electrical contact of the supply electrode is positioned farther from the developing roller shaft than the second electrical contact of the developing electrode is from the developing roller shaft.

Abstract: A fixing device includes: a rotary body, a heater having one end and another end, a first power supply cord having one end portion connected to the one end of the heater, a first insulator, a second power supply cord having one end portion connected to the other end of the heater, a second insulator, a support frame, and a restriction member. The first insulator holds both the one end of the heater and the one end portion of the first power supply cord. The second insulator holds both the other end of the heater and the one end portion of the second power supply cord. The support frame includes a first support portion supporting the first insulator and a second support portion supporting the second insulator. The restriction member is detachably attachable to the support frame and restricts movement of the first insulator in a first direction.

Abstract: A terminal contact structure includes a first terminal provided on a removable body; a second terminal provided on an apparatus body in which the removable body is inserted, the second terminal not being in contact with the first terminal when the removable body is in a removable state, the second terminal being in contact with the first terminal when the removable body is in a fixed state; and a guide member provided on the apparatus body and having a first surface and a second surface, the first surface guiding the first terminal in an insertion direction in which the removable body is inserted, the second surface guiding the second terminal in a contact direction in which the second terminal comes into contact with the first terminal, the contact direction being a crossing direction that crosses the insertion direction.

Abstract: There are demands for stable connections of contact points between a process cartridge, including a development device, and an image forming device. A development contact point, a first contact point, and a second contact point are disposed in this order on the inside in a perpendicular direction with respect to an insertion direction in which a development device is inserted into an image forming apparatus.

Abstract: 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.

Abstract: A toner cartridge according to one example embodiment includes a housing having a reservoir for holding toner and an outlet in fluid communication with the reservoir for exiting toner from the toner cartridge. A rotatable media feed roll is positioned on an exterior portion of the housing to engage a corresponding media feed roll in the image forming device when the toner cartridge is installed in the image forming device for forming a media feed nip with the corresponding media feed roll in the image forming device when the toner cartridge is installed in the image forming device.

Abstract: There is provided an image forming apparatus including a main body and a cartridge having an image carrier and a first coupling configured to rotate the image carrier. The main body includes a second coupling, a rotator and a receiving member. The second coupling is configured to rotate together with the first coupling about a rotation axis coaxially with the first coupling. The rotator includes gear teeth. The rotator is configured to rotate the second coupling in response to receiving the drive force from the drive source, and to rotate together with the second coupling about the rotation axis coaxially with the second coupling. The rotator, which is configured to rotate about the rotation axis coaxially with the first coupling configured to rotate the image carrier, overlaps with the receiving member when viewed from an axial direction parallel to the rotation axis.

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 ground plate includes an electrically conductive planar member having a long axis and a perpendicular short axis. The planar member has an elongated hexagonal shape having two opposing long sides, two opposing relatively shorter sides, and four angled sides between the long sides and the relatively shorter sides with a hollow central opening. Spring clips extend from inner edges of the hollow central opening. The inner edges from which the spring clips extend are parallel to the long axis. Each spring clip includes a distal end portion curving outward from the hollow central opening and is configured to contact a shaft extending through the hollow central opening to form an electrical connection between the planar member and the shaft. A tab projection extends from an outer edge of each of the relatively shorter sides. Each tab projection is in the same plane as the planar member.

Abstract: A developing cartridge includes: a casing, a developing roller, a storage medium having an electrical contact surface, a holder, and a holder cover configured to cover the holder. The holder has: a first outer surface holding the electrical contact surface, a second outer surface spaced away from the first outer surface in a third direction, and a resilient member connected to the first outer surface and to the second outer surface. The resilient member is configured to expand and contract to change a distance between the first outer surface and the second outer surface. The resilient member has a first length in the third direction in a state where the holder cover is detached from the holder. The resilient member has a second length in the third direction smaller than the first length in a state where the holder cover is attached to the holder.

Abstract: A developing cartridge includes a storage medium and a holder. The developing cartridge may be configured to move from a first position to a second position and further from the second position to a third position. The holder may include a first outer surface, a second outer surface, and an engaging portion. The second outer surface may have a guide surface out of contact with part of an image forming apparatus in a case where the developing cartridge is at the first position. The guide surface may contact with the part of the image forming apparatus in a case where the developing cartridge is at the second position. The engaging portion may be configured to allow the holder to engage with the image forming apparatus in a state where an electric contact surface contacts with an electric connector in a case where the developing cartridge is at the third position.

Abstract: A developing cartridge includes a casing, a rotating member, and an electrode member. The casing may be configured to accommodate therein developer. The rotating member has a rotational shaft extending in an axial direction. The rotating member is configured to rotate about the rotational shaft and carries the developer thereon. The electrode member is configured to be electrically connected to the rotating member. The electrode member covers at least part of the rotational shaft from an orthogonal direction orthogonal to the axial direction and is arranged to confront the casing in the axial direction. The electrode member is configured to move in the orthogonal direction in accordance with a movement in the axial direction.

Abstract: A developer cartridge attachable to a drum cartridge including a photosensitive drum is provided. The developer cartridge includes a casing configured to store toner therein, a developer roller rotatable about a first axis extending in an axial direction, and a developer electrode electrically connectable with the developer roller. The developer electrode is configured to be in contact with a first electrode of an image forming apparatus along the axial direction. In a state where the developer cartridge is attached to the drum cartridge, a portion of the developer electrode faces a surface of a lateral wall of the drum cartridge on an opposite side to a surface facing the casing.

Abstract: A drum cartridge, comprising: a photosensitive drum; and a drum frame having a first state where a developing device is attached to the drum frame, the developing device including a developing roller, and a second state where a developing cartridge is detachably attachable to the drum frame, the developing cartridge including a developing roller and a developing frame which stores toner, wherein, in the first state, a toner cartridge is detachably attachable to the developing device.

Abstract: An image forming apparatus includes a body casing, a plurality of process cartridges, and a moving member. Each process cartridge includes a photosensitive drum having a rotation axis extending in a first direction. The plurality of process cartridges is configured to move between an engaging position and a release position in a second direction perpendicular to the first direction. The photosensitive drum and the positioning member engage with each other in the engaging position, and are disengaged from each other releasing the engagement in the release position. The moving member in a pressing position is configured to exert pressure so that the process cartridges are moved to the engaging position. The moving member in the non-pressing position is configured to release the pressure so that the process cartridges are moved to the release position.

Abstract: A developing roller rotatable about a first axis extending in a first direction is positioned at one end portion of a casing of a developing cartridge in a second direction. A holder, movable relative to the casing between first and second positions in a third direction crossing an electric contact surface of a storage medium, has one end portion, in the third direction, that holds the electric contact surface. A first lever is movable relative to the casing between third and fourth positions about a second axis extending in the first direction. A second lever movable together with the holder is movable between fifth and sixth positions relative to the first lever. The holder is at the first position in a case where the second lever is at the fifth position, and is at the second position in a case where the second lever is at the sixth position.

Abstract: A fixing device includes: first and second heaters; a frame; and first and second terminals. The frame includes first and second fixing surfaces. The first terminal is electrically-connected to the first heater and includes: a first plate-shaped portion including a first fixed portion fixed to the first fixing surface. The second terminal is electrically-connected to the second heater and includes: a second plate-shaped portion including a second fixed portion fixed to the second fixing surface; and a first electrical connection portion electrically-connected to a power source and including: a first intermediate portion bent from the second plate-shaped portion and extending in a first direction connecting the second fixed portion and the second fixing surface; and a first tip portion. The first intermediate portion has: a first end connected to the second plate-shaped portion; and a second end from which the first tip portion extends along the first plate-shaped portion.

Abstract: A printing device includes a platen roller, a pair of bearings, and a holder including a pair of fitting portions to which the bearings are fitted. The bearings rotatably support a rotational shaft of the platen roller. Each bearing includes a small-diameter portion, a large-diameter portion coaxially connected to the small-diameter portion, and a protrusion provided at an outer circumferential surface of the small-diameter portion. The larger-diameter portion has a peripheral surface and an end face connecting the peripheral surface to the outer circumferential surface. Each fitting portion includes: a receiving portion configured to receive the small-diameter portion; an opening to which the protrusion is fitted; and a receiving surface configured to contact the end face of the large-diameter portion from outward in an axial direction of the rotational shaft. At least one of the end face and the receiving surface includes a recessed portion.

Abstract: An image forming apparatus of the present invention includes a unit (18), a high-voltage board (36), a connecting member (43) and a holding member (44). The connecting member (43) is arranged in a current path from the high-voltage board (36) to the unit (18). The holding member (44) holds the connecting member (43). The connecting member (43) includes a spring terminal (68) and a protruding part (69). The protruding part (69) protrudes from the spring terminal (68) to an outer diameter side. The holding member (44) includes a housing (83) and a locking part (91). The housing (83) houses the spring terminal (68). The locking part (91) is arranged integrally with the housing (83). When the locking part (91) locks the protruding part (69), movement of the spring terminal (68) in an axial center direction is restricted.

Abstract: An image forming apparatus includes an option device, the option device is coupled with a lower surface of an apparatus main body. A second connector is configured to be displaced between a first position and a second position. A push portion is configured to be pressed toward an inside of the option device when the option device is coupled with the lower surface. A link portion is pivotably supported, coupled with both the push portion and the second connector, and configured to, interlocking with the push portion being pressed, cause the second connector to be displaced from second position to first position. A first coupling portion couples the push portion with the link portion. A second coupling portion is configured to couple the second connector with the link portion. The first coupling portion and/or the second coupling portion is configured to release the coupling with the link portion.

Abstract: A drum cartridge, to which a developer cartridge containing toner therein and including a memory medium with an electric contact is detachably attached, is provided. The drum cartridge includes a photosensitive drum; a drum frame to receive the developer cartridge; a lock lever configured to lock the developer cartridge to the drum frame; a first drum contact configured to be in contact with the electric contact in a state where the developer cartridge is locked to the drum frame; and a spring configured to urge the first drum contact toward the electric contact. In the state where the developer cartridge is locked to the drum frame, the first drum contact is pressed toward the electric contact by an urging force of the spring.

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: An image forming apparatus includes an apparatus main body, a conductive member, a contact spring, a hollow cylinder, and a drum unit attachable to and detachable from the apparatus main body. The conductive member is disposed in the drum unit. The contact spring is disposed in the apparatus main body and comes in electrically conductive contact with the conductive member. The hollow cylinder is disposed in the apparatus main body. The contact spring has a contact part and a helical spring part. The contact part is provided on the helical spring part. The contact part is retractable in and out of the hollow cylinder. The helical spring part is contained in the hollow cylinder and urges the contact part in a direction for causing the contact part to protrude from the hollow cylinder. The contact part has a longitudinal shape elongated along an axis of the helical spring part.

Abstract: An image forming apparatus includes a main body, a cartridge support member configured to have a process cartridge provided with first electrical contact points attachable thereto, and a holder configured to have second electrical contact points which are electrically contactable to the first electrical contact points. When the cartridge support member is moved from a first position to a second position in the main body, the second electrical contact points are electrically connected to the first electrical contact points while the cartridge support member is at the first position, while the cartridge support member moves between the first position and the second position, and while the cartridge support member is at the second position. The holder electrically disconnects the second electrical contact points from the first electrical contact points when the cartridge support member is moved to a third position outside the main body.

Abstract: An image forming apparatus is provided with an image holder that holds an electrostatic latent image, a developing unit that develops the electrostatic latent image of the image holder, a biasing unit that biases the developing unit toward the image holder; and a holding member that holds the biasing unit and is disposed so that a part which is opposite to a biasing direction of the biasing unit is in contact with an image forming apparatus main body directly or via another member.

Abstract: An image-forming apparatus includes: a main body; a toner cartridge having a first opening; a process cartridge having a photosensitive drum and a second opening; a positioning part; a transfer unit; and an urging member. The toner cartridge and process cartridge are attachable to and detachable from the main body in an axial direction of the photosensitive drum. The positioning part and transfer unit are positioned above the process cartridge attached to the main body. The positioning part fixes the attached process cartridge in position relative to the main body. The urging member urges the attached process cartridge toward the positioning part and urges the process cartridge such that such that the toner can be supplied from the toner cartridge to the process cartridge through the first opening and the second opening when the toner cartridge and the process cartridge are attached to the main body.

Abstract: An image forming apparatus includes an apparatus body including a mounting section provided with a first connection terminal, and a removable unit provided with a second connection terminal. The second connection terminal is held by a holding member that is mounted on a side surface portion of the removable unit while the holding member is displaceable in a direction that is orthogonal to a movement direction of the removable unit when the removable unit is mounted or removed and while the holding member is pushed towards an outer side of the side surface portion by an elastic member. When the removable unit is mounted, the holding member becomes displaced towards an inner side of the side surface portion, and the holding member becomes pushed towards the outer side of the side surface portion by the elastic member, so that the second connection terminal contacts the first connection terminal.

Abstract: Provided is a positioning structure into which a positioning protrusion provided at a member is inserted and which positions the member, wherein a metal plate is provided with a hole which is processed to have a shape protruding toward the positioning protrusion to be inserted therein and whose tip end portion on the protruding side has an increasing diameter toward a tip end and into which the positioning protrusion is inserted.

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: An apparatus body includes an elastic body-side terminal, which is a terminal for supplying electricity to a cartridge. The cartridge includes: a developing apparatus that develops as a developer image an electrostatic latent image formed on an image bearing member; a cartridge-side terminal for supplying electricity from the apparatus body; and a frame having an opening that exposes the cartridge-side terminal. In a process of attaching the cartridge to the apparatus body, the body-side terminal makes contact with the cartridge-side terminal by being inserted into the opening. The body-side terminal presses the cartridge-side terminal in a state in which the cartridge is attached to the apparatus body.

Abstract: A photosensitive member cartridge detachably mountable to a main assembly of an image forming apparatus for forming an image, includes a frame; a photosensitive drum on which and which is provided in the frame; a transfer member for transferring an image formed on the drum onto the sheet; a mounting portion for detachably mounting a developing cartridge including a developer carrying member onto the drum and a memory for storing information; a first electrical contact provided on the frame and electrically connectable with a main assembly electrical contact provided in the main assembly when the cartridge is mounted to the main assembly; and a second electrical contact provided on the frame for electrically connecting the memory and the first electrical contact portion with each other when the developing cartridge is mounted to the mounting portion.

Abstract: On a projection plane orthogonal to an axial line of a developing agent bearing member, forming an imaginary region surrounded by a plurality of straight lines and edges of electric contacts, while satisfying first, second, and third conditions, disposes the entirety of a positioning region inside an imaginary region. The first condition is that each of the ends of the plurality of straight lines is situated at an edge of the electric contacts or at the center of the developing agent bearing member. The second condition is that the center of the developing agent bearing member is situated at an intersection of the plurality of straight lines, or upon one of the straight lines. The third condition is that each of the straight lines is stipulated so that the area of the imaginary region is maximal, within the constrictions of the first and second conditions.

Abstract: An image forming apparatus includes an apparatus main body, an image carrier, a developing device, a developer housing container, and a connector. The connector includes a connector housing and elastically deformable second ground terminal and second input/output terminal. The connector housing includes an opening and an end edge. The end edge defines one side portion of the opening. The second ground terminal and the second input/output terminal are projected from the opening. The second ground terminal and the second input/output terminal contact the first ground terminal and the first input/output terminal, respectively by mounting the developer housing container to the internal space. The second ground terminal and the second input/output terminal each abut the end edges on the connector housing with elastic force. The abutment regulates a maximum amount of projection of the second ground terminal and the second input/output terminal with respect to the opening.

Abstract: Provided is an electrophotographic image forming apparatus including a developing device attached to/detached from a main body; a memory unit provided in the developing device to transfer information related to the developing device to the main body, and a contact portion for connecting to the main body; and a connection portion provided in the main body, and connecting to the contact portion when the developing device is attached to the main body, wherein one of the connection portion and the contact portion has a first location, where the connection portion or the contact portion is inclined with respect to the first direction of the developing device, and a second location, where the connection portion or the contact portion is in parallel with the first direction.

Abstract: 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.

Abstract: An image forming apparatus includes a fixed contact point and a movable contact point. The fixed contact point is provided in a unit side opposing part. A movable contact point is provided in a rail side opposing part. The rail side opposing part is formed with an opening. The movable contact point is a contact spring formed of an electrical conductive wire. The movable contact point has a fixing part, a contact part and a pull-out prevention part. The fixing part is fixed to the rail on an opposite side to the rail side opposing part. The contact part is biased with respect to the fixing part to protrude toward the fixed contact point through the opening. The pull-out prevention part restricts a protruding position of the contact part toward the fixed contact point. The pull-out prevention part is formed into a spiral shape.

Abstract: Provided is a process cartridge attachable to and detachable from a main body of an image forming apparatus. The process cartridge includes at least one roller, sidewalls on an axial direction of the at least one roller, and a first cartridge electric contact and a second cartridge electric contact provided on the sidewalls. One of the first cartridge electric contact and the second cartridge electric contact is a fixed electric contact, and the other is a movable electric contact that is movable in a direction protruding from the sidewalls.