Abstract: An image forming apparatus includes a main body portion including an image carrier, an image-carrier driving unit, a latent-image forming unit, a developing-unit attachment section, and a transfer-unit attachment section. The developing-unit attachment section receives a first developing unit having plural developing members or a second developing unit having a single developing member. The transfer-unit attachment section receives a first transfer unit, which includes a first transfer member capable of retaining a recording medium and a first transfer driving unit that rotates the first transfer member, and a second transfer unit, which includes a second transfer member that cannot retain the recording medium. When the first developing unit and the first transfer unit are attached to the developing-unit attachment section and the transfer-unit attachment section, respectively, the first transfer driving unit is mechanically connected to the first developing unit.

Abstract: A process cartridge, which includes a developing cartridge and a photosensitive cartridge for use with an image forming apparatus including a driving force output part and a feeding part, is provided. The developing cartridge includes a developer carrier, a first electrode provided at one side thereof, and a driving force receiving part provided at another side thereof and aligned with the first electrode such that the driving force receiving part overlaps the first electrode in a side view. The photosensitive cartridge, to which the developing cartridge is removably mounted, includes a photosensitive member, and a second electrode that contacts the first electrode when the developing cartridge is mounted in the photosensitive cartridge and that contacts the feeding part when the photosensitive cartridge is mounted in the image forming apparatus. The first electrode is pressed toward the driving force receiving part by contact with the second electrode.

Abstract: A cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus includes a developer carrying member for developing an electrostatic latent image formed on an image bearing member, and an electroconductive developer layer thickness regulating member for regulating a layer thickness of a developer deposited on the developer carrying member. A part of the developer layer thickness regulating member is directly contactable to the main assembly electrical contact.

Abstract: The present invention provides a configuration in which an electrically connected condition can further be stabilized in electrical-connection zones between a body of an image-forming apparatus, and an image-forming unit and a plurality of image-forming cartridges. Developing electrode members and wire power-feed electrodes are attached to a slide frame. Each of the developing electrode members has a first body-side contact. The developing electrode members are electrically connected with the developing-roller output terminals. The wire power-feed electrodes are electrically connected with wire output terminals through contact with the wire output terminals. The developing electrode members are elastically deformed as a result of their first body-side contacts being pressed in a direction, which is along a slide direction, by the developing-roller output terminals. The wire power-feed electrodes are pressed in a paper width direction by the wire output terminals.

Abstract: A conductive chassis plate faces a printed circuit board at a distance. One end of the conductive chassis plate is aligned with one end of the printed circuit board. One end of the conductive chassis plate is electrically connected to a ground wiring pattern provided on one end of the printed circuit board. One end of the conductive chassis plate is electrically connected to a conductive member that extends from one end of the conductive chassis plate toward the other end. As a result, in transmitting or receiving a signal with respect to external equipment attached to a connector, an influence of electrostatic discharge is reduced with a simple configuration.

Abstract: An image forming apparatus is disclosed. The image forming apparatus includes a body having an opening perforated in one side thereof, a developing unit detachably mounted to the body through the opening, a body cover configured to cover a rear portion of the developing unit in a mounting direction of the developing unit and adapted to open or close the opening, and a memory unit provided at the rear portion of the developing unit and having a developing device terminal. The body cover includes a body terminal to come into contact with the memory unit. Accordingly, an electrical connection between the developing unit and the body can be made less susceptible to vibration, etc. caused during operation of a drive motor.

Abstract: A flange assembly for a drum of an image forming apparatus. The flange assembly including a flange having a hollow portion that extends from a first end of the flange to a second end of the flange, and a grounding member provided within the hollow portion of the flange. The grounding member is configured to ground the drum by contacting a ground pin of the image forming apparatus when the drum and the flange assembly are mounted to the image forming apparatus. When the grounding member is provided within the hollow portion of the flange, an open space is provided along an entire length from the first end of the flange to the second end of the flange. The driving flange has a generally triangular-shaped drive member at a terminal end thereof, and the drive member is configured to mate with a drum drive assembly of the image forming apparatus.

Abstract: A driving unit for a photo conductor drum cartridge is assembled with a shaft of the photo conductor drum cartridge, including a gear and a conducting plate mounted on the gear. The conducting plate is provided with an elastic arm and defines an imaginary axis parallel to the shaft. When the elastic arm of the conducting plate is perpendicular to the imaginary axis, a distance L is defined between a distal end of the elastic arm and the imaginary axis. The distance L is longer than or equal to a radius d of an annular groove portion of the shaft and shorter than a radius D of the shaft. By means of this design, the driving unit can be reusable and provide a convenient detachment of a photo conductor drum.

Abstract: According to an embodiment, there is provided a mechanism for electrification of a rotating body used in an image forming apparatus. In the mechanism, compression of an elastically-deformable pressing member brings a portion of a cloth-like or sheet-like conductive member into contact with an electrification object and presses the rest of the conductive member against a conductive contact member, which is any one of the rotating body, a rotating shaft that rotates together with the rotating body, and a shaft that rotatably supports the rotating body. A connecting between the electrification object and the contact member is achieved via the conductive member.

Abstract: An image forming apparatus has a body frame and a slide frame. The slide frame is configured to be pulled out from the body frame along a sliding direction. A plurality of image forming cartridges is detachably mounted on the slide frame. A plurality of electrode members is mounted on the slide frame and aligned along the sliding direction so as to correspond to the image forming cartridges. A body-side contact portion of each of the electrode members is electrically connected to the body frame. A cartridge-side contact portion of the electrode member is electrically connected to the image forming cartridge. The image forming cartridge is connected to the body via the corresponding electrode member when the slide frame mounting the image forming cartridges is inserted to the body frame.

Abstract: A developing device detachably coupled to an electrophotographic image forming apparatus which includes a housing including a photoconductive drum and at least one roller; and an electrical contact member disposed in the housing, connected to the at least one roller, and formed of a conductive metallic plate to provide an electrical path between the at least one roller and a power supply when the developing device is attached to the electrophotographic image forming apparatus, wherein the electrical contact member includes a base including a coupling unit to engage with the housing, a first elastic member to bend from the base in a first direction; a second elastic member to bend from the first elastic member in a second direction and including a contact to contact the at least one roller; and an anti-deformation unit to bend from the base and to face a surface of the first elastic member in the second direction of the second elastic member to prevent the first elastic member from bending in the second direct

Abstract: A developing cartridge having a collar member provided over an axially end portion of a developing roller shaft and movable in an axial direction thereof. The collar member includes a cap portion covering the axial end portion of the rotation shaft and electrically contacted with the rotation shaft, and a power-feed receiving portion electrically connected to the cap portion and electrically contactable with an external electrode. The power-feed receiving portion is provided integrally with the cap portion.

Abstract: A developer cartridge according to one aspect of the invention is attachable to a photoconductor unit that comprises a photoconductive drum. The developer cartridge comprises: a developing frame; a developing roller rotatably supported by the developing frame, and pressed to the photoconductive drum in a pressing direction when the developer cartridge is attached to the photoconductor cartridge; a memory unit attached to the developing frame; and a terminal electrically connected to the memory unit and disposed at an outer portion of the developing frame at a position substantially opposite to the developing roller with respect to the pressing direction.

Abstract: An image processing apparatus is provided that includes plural devices, a device control unit associated with each of the devices for controlling a power status of each of the devices according to a relevant power mode, and power mode setting unit for setting the relevant power mode to the device control unit.

Abstract: A cartridge is detachably mountable to an electrophotographic image forming apparatus having a main assembly electrical contact. The cartridge includes: an electrophotographic photosensitive member; a memory; a cartridge electrical contact electrically connectable to the main assembly electrical contact; a contact including the cartridge electrical contact; and a support supporting the contact. The support includes first and second regulators of the contact member in widthwise and thickness directions, respectively, with a gap therebetween. Also provided is an opening permitting insertion of the contact into the support that opens in one direction perpendicular to the widthwise and thickness directions. The main assembly electrical contact includes a spring movable by a stroke in the contact thickness direction, and the gap of the second regulator W1, a length W2 of the contact in the thickness direction, the stroke U satisfy, W2<W1, and (W1?W2)<U.

Abstract: A developing cartridge includes a case having a first sidewall and a second sidewall opposite to the first sidewall, and a developing roller disposed between the first sidewall and second sidewall. The developing roller can include a developing roller shaft and a developing roller member configured to carry a developing agent thereon, the developing roller member disposed around the developing roller shaft. Also, the developing cartridge can include an electrode disposed on the first sidewall adjacent to the developing roller shaft, the electrode electrically connected to the developing roller member, and a driven coupling disposed on the second sidewall. The electrode can include, an extending portion extending in a direction away from the first sidewall. An outermost periphery of the driven coupling defines a projection plane projecting in a direction towards the electrode, wherein at least a part of the extending portion is disposed within the projection plane.

Abstract: An electrophotographic image forming apparatus includes a main assembly mounting a process cartridge, a movable member movable from outside to inside the main assembly while supporting the cartridge, and an intermediary electrical contact supplying a bias voltage to the cartridge and disposed at a downstream side of the movable member. The cartridge includes an electrophotographic photosensitive drum, process means actable on the drum, an input electrical contact at a leading end with respect to the moving direction of the movable member when the cartridge is supported on the movable member and contacting the intermediary electrical contact when the cartridge is supported on the movable member, a contact portion provided at an upstream side with respect to the moving direction and contactable to the movable member when the input electrical contact is contacted by the intermediary electrical contact and is elastically urged by the intermediary electrical contact.

Abstract: Provided is an image forming apparatus having a network connecting portion, a control portion, and a status information storage portion. When a status request is sent from an external apparatus while the image forming apparatus is in a power-saving status, based on a condition set by a setting portion, the control portion makes a determination of whether (a) to perform supply of power to the main body of the image forming apparatus and acquire a status information to transmit it through the network portion or (b) not to perform supply of power to the main body of the image forming apparatus, but to transmit through the network portion a status information that has been stored in the status information storage portion before the status request, and performs controls based on the determination.

Abstract: A cartridge set in a main body of an image forming apparatus including a developer roller positioned opposite a photosensitive member and a frame including the developer roller and in contact with an urging unit, wherein the urging unit is structured to urged the developer roller towards the photosensitive member, also the urging unit is structured to transfer a voltage from a power supply unit to the developer roller.

Abstract: A fixing device for fixing an unfixed image formed on a sheet by passing the sheet through a fixing nip, the fixing device comprising: a pair of ring-shaped electrodes each disposed along a different one of edges of endless belt and flanking a sheet-passing region on an external circumferential surface of the belt; and a pair of power feeders each being in contact with a different one of the ring-shaped electrodes at a contact area and feeding power to a resistive heat layer included in the belt, at least one of the power feeders being located at a position upstream from the fixing nip in a rotation direction of the belt and allowing a portion of the belt between the fixing nip and the contact area to be in close contact with the first roller while the belt is being rotated.

Abstract: An image forming device includes a main body, a grounding member, and a supporting member. The supporting member is slidably movable between a mounting position and a drawn-out position with respect to the main body. The supporting member includes a plurality of photosensitive drums, a pair of side plates, a contact portion, and a connecting portion. The pair of side plates supports each photosensitive drum. At least one side plate is electrically connected to the grounding member when the supporting member is disposed at the mounting position. A user contacts to the contact portion when the user draws the supporting member to move from the mounting position. The contact portion and the at least one side plate are electrically connected with each other via the connecting portion. Each of the pair of side plates, contact portion, and connecting portion is made of an electrically conductive material.

Abstract: An image forming apparatus includes a main body, a developing unit, a drawer movably installed at the main body and including a tray and a cover. The cover includes a first operation section and a second operation section, an interlocking member to be moved along with the drawer in the first operation section of the cover, and a lift member to be vertically moved according to movement of the interlocking member, wherein the developing unit is provided with a first connection terminal. The lift member is arranged with a second connection terminal, and the tray is arranged with a third connection terminal connected to the second connection terminal according to the position of the second connection terminal so that the second and third connection terminals are disconnected prior to extraction of the tray from the main body.

Abstract: A fixing device includes a first alternating electric current power supply that outputs a first alternating electric current having a first frequency that causes a magnetic flux generated by an exciting coil to reach a first heat generation layer of a fixing rotary body; a second alternating electric current power supply that outputs a second alternating electric current having a second frequency that is lower than the first frequency and causes the magnetic flux to reach the first heat generation layer of the fixing rotary body and a second heat generation layer of a heat generator; and a switch circuit connected to the exciting coil, the first alternating electric current power supply, and the second alternating electric current power supply to selectively connect the first alternating electric current power supply or the second alternating electric current power supply to the exciting coil.

Abstract: An image forming apparatus includes installation/separation of a high-voltage connector to apply high-voltage current to a developing unit, a connector to transmit developing information, and a coupling connector to connect or disconnect a coupling to transmit power to rollers of the developing unit is performed as a drawer is pushed into or pulled out of a main body.

Abstract: An electrically conducting structure includes: an electrically conductive bar member; a frame member supporting the bar member; and a conducting metal plate, provided with a base portion for mounting the conducting metal plate to the frame member and provided with a contact portion, extending out from the base portion and bending to make contact with a side face of the bar member.

Abstract: An image forming apparatus including an image forming apparatus body, a cassette attaching section, a media cassette, a release portion, a first ground conducting route and a second ground conducting route is provided. The cassette attaching section includes a media supplying roller. The media cassette is removably installed in the cassette attaching section. The media cassette includes a loading plate, a pushing up member and a plate holding portion. The release portion engages the plate holding portion. The first ground conducting route conducts static electricity charged on the media and includes a conducting portion. The second ground conducting route conducts static electricity charged on the media when the media is conveyed by the media supplying roller.

Abstract: An image forming apparatus having a mounting/demounting structure between a main body and an image carrying unit. The image forming apparatus includes a main body provided with a first electrical connecting part, an image carrying unit removably mounted in the main body and provided with a second electrical connecting part, and a guide device to guide the image carrying unit in an insertion direction and a lateral direction so that the second electrical connecting part of the image carrying unit is connected to the first electrical connecting part of the main body.

Abstract: An electrical connection structure includes a holder that holds an electric terminal provided with an electrical contact portion having elasticity and held such that the electrical contact portion is elastically deformable; a guiding member fitted to the holder and capable of guiding the holder in first and second directions, which are substantially orthogonal to each other, to move the electrical contact portion to a predetermined contact position on a conductive member, the first direction being a direction in which the electrical contact portion is elastically deformed by being pressed against the conductive member; and a restraining member that comes into contact with the holder that has been guided by the guiding member to move the electrical contact portion to the contact position, the restraining member restraining the holder from being moved in a direction opposite to the first direction by an elastic reaction force applied to the holder.

Abstract: A color electrophotographic image forming apparatus is usable with process cartridges that each include an electrophotographic photosensitive drum. The image forming apparatus includes a movable member that is movable between an inside of the main assembly of the apparatus and an outside of the main assembly of the apparatus in a direction crossing with a longitudinal direction of the drum while carrying the cartridges. A main assembly electrical contact is provided inside the main assembly along a movement path of the movable member. An intermediary electrical contact is provided and includes a first electrical contact portion that is disposed inside the movable member, with the intermediary electrical contact being electrically connectable to a cartridge electrical contact of a cartridge, and a second electrical contact portion is disposed outside the movable member, with the second electrical contact portion electrically connectable to a main assembly electrical contact provided in the main assembly.

Abstract: An image forming apparatus may include an apparatus body, and a photosensitive-member unit slidably attached to the apparatus body and retaining a plurality of photosensitive members. The apparatus body includes side wall portions opposing each other with a unit receiving section sandwiched therebetween, and a plurality of apparatus-body-side electrode members provided on the side wall portions, and each urged inward in an opposing direction of the side wall portions. The photosensitive-member unit includes a plurality of unit-side electrode members each protruding outward in the opposite direction and a guide path comprising a flat surface formed in a flat shape so that each of the apparatus-body-side electrode members slidably contacts to the flat surface during attachment of the photosensitive-member unit with respect to the unit receiving section, and that each of the apparatus-body-side electrode members slidably contacted maintains a constant inward and outward position in the opposite direction.

Abstract: An image forming apparatus includes a plurality of developing devices, a voltage generating part to generate a developing voltage, first switching parts to supply the voltage generated in the voltage generating part to a predetermined developing device out of the plurality of developing devices, a second switching part to selectively supply the developing voltage generated in the voltage generating part to the first switching parts, and a controller to control the first switching parts and the second switching part.

Abstract: An electrical contact member for electrically connecting to an external contact which is electrically connected with an electroconductive cylindrical member having a photosensitive layer on an outer surface thereof and which is provided outside the cylindrical member, the electrical contact member comprising a first contact portion contacted with the cylindrical member; a second contact portion contacted with the external contact; a first extension connected electrically with the first contact portion and extending in a diametrical direction across an axis of the cylindrical member; and a second extension electrically connecting with the first extension and extending the diametrical direction toward the axis, the second extension being provided with the second contact portion, wherein when second contact portion is contacted by the external contact, second contact portion displaces along the axis.

Abstract: A surface heating type heating unit for a fixing device, and a fixing device and an image forming apparatus including the same. The surface heating type heating unit includes a planar heating element on an outer circumferential surface of a supporter having cylindrical shape, a power feeding terminal at each end of the supporter, and a connector disposed between the planar heating element and the power feeding terminal. The connector is formed on a first region on the power feeding terminal, and includes an adhesive material for adhering the planar heating element and the power feeding terminal, and a conductive material formed on a second region of the power feeding terminal excluding the first region.

Abstract: A developing apparatus includes a developing roller for developing an electrostatic latent image formed on a photosensitive member. A drive transmission member is provided at one end of the developing roller for receiving a driving force and transmitting the driving force to the developing roller. The developing apparatus also includes an urging member, provided at other end of the developing roller, for urging the developing roller. An abutting portion is abutted by the shaft of the developing roller by an urging force of the urging member to position the developing roller with respect to the axial direction of the developing roller, and a contact member contacts a peripheral surface of the shaft of the developing roller to apply a voltage to the developing roller.

Abstract: An image forming apparatus includes an image forming apparatus body including a driving force transmitting portion and a process cartridge. The process cartridge includes a housing, a photosensitive drum disposed in the housing, a first bearing rotatably supporting an axial end portion of the photosensitive drum, a driving force input portion, which is provided on the axial end portion of the photosensitive drum and is configured to engage the driving force transmitting portion in order to drive the photosensitive drum by a driving force transmitted from the driving force transmitting portion when the driving force transmitting portion is pressed against the driving force input portion, and a second bearing, which rotatably supports the other axial end of the photosensitive drum, and which comprises a first contact portion which contacts the image forming apparatus body when the driving force transmitting portion is pressed against the driving force input portion.

Abstract: A cartridge is detachably mountable to an electrophotographic image forming apparatus having a main assembly electrical contact. The cartridge includes: an electrophotographic photosensitive member; a memory; a cartridge electrical contact electrically connectable to the main assembly electrical contact; a contact including the cartridge electrical contact; and a support supporting the contact. The support includes first and second regulators of the contact member in widthwise and thickness directions, respectively, with a gap therebetween. Also provided is an opening permitting insertion of the contact into the support that opens in one direction perpendicular to the widthwise and thickness directions. The main assembly electrical contact includes a spring movable by a stroke in the contact thickness direction, and the gap of the second regulator W1, a length W2 of the contact in the thickness direction, the stroke U satisfy, W2<W1, and (W1?W2)<U.

Abstract: An image forming apparatus, having: a transfer device that adjusts a second charge amount so that a first charge amount of charges which flow toward a core from the region of a conductive layer which comes into contact with a power feeding member when a voltage is applied to the power feeding member from a power source becomes greater than the second charge amount of charges which flow toward the region which comes into contact with an intermediate transfer body from the core.

Abstract: An image forming apparatus includes an image carrier, and a rotation device having image-forming devices each containing a toner and forming a toner image on the image carrier with the toner. The apparatus further includes: a detector attached to at least one of the image-forming devices to detect a quantity of the toner, thereby outputting an analog signal representing the quantity; and a transmission path transmitting the analog signal to the outside of the rotation device. The transmission path includes: a rotation terminal mounted on and rotating with the rotation device; and a contact terminal provided outside the rotation device, and maintaining continuity with the rotation terminal by contacting a surface of the rotation terminal even when the rotation terminal rotates. The apparatus further includes a correction section correcting the analog signal transmitted by the transmission path, according to a contact resistance between the rotation terminal and the contact terminal.

Abstract: A process cartridge is provided detachably mountable to a main assembly of an electrophotographic image forming apparatus. The process cartridge includes an electrophotographic photosensitive drum, a frame for supporting the electrophotographic photosensitive drum, a developing roller, and a developer supplying roller. The process cartridge further includes portions-to-be-supported, portions-to-be-positioned, a portion-to-be-urged, and a cartridge side developer supply roller bias contact. The process cartridge can be positioned with high accuracy relative to the main assembly of an image forming apparatus.

Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus includes an electrophotographic photosensitive drum, a developing roller, a developer accommodator including two frames two end portion members, supporting the roller, a first member providing an electrostatic capacity between itself and the roller when a developing bias voltage is applied to the developing roller, and a second member including a contact portion elastically contacting to a bent portion of the accommodator, and a first electrical contact portion, electrically connected to the contact portion, for transmitting, to the main assembly, an electric signal corresponding to a value of the electrostatic capacity provided between the developing roller and the first member. The second member is mounted to one end portion member such that the contact portion is inside the one end portion member and the first electrical contact portion is outside the one end portion member.

Abstract: A process cartridge, which includes a developing cartridge and a photosensitive cartridge for use with an image forming apparatus including a driving force output part and a feeding part, is provided. The developing cartridge includes a developer carrier, a first electrode provided at one side thereof, and a driving force receiving part provided at another side thereof and aligned with the first electrode such that the driving force receiving part overlaps the first electrode in a side view. The photosensitive cartridge, to which the developing cartridge is removably mounted, includes a photosensitive member, and a second electrode that contacts the first electrode when the developing cartridge is mounted in the photosensitive cartridge and that contacts the feeding part when the photosensitive cartridge is mounted in the image forming apparatus. The first electrode is pressed toward the driving force receiving part by contact with the second electrode.

Abstract: A developing device to prevent damage of a memory unit and poor connection between terminals of the memory unit and a main body of an image forming apparatus, by improving a mounting position of the memory unit. The developing device is removably mounted to a main body of the image forming apparatus. The memory unit includes terminals exposed through a rear side of the developing device. The memory unit is disposed closer to a power reception unit formed at one side of the developing device than to a driving force reception unit formed at an other side of the developing device.

Abstract: An image forming apparatus includes an image carrier; a developing device configured to hold a developer carrier to supply developer to the image carrier, the developing device movable to a contacting position where the developer carrier contacts the image carrier and to a spaced position where the developer carrier is spaced from the image carrier; and a memory element disposed in the developing device. The developing device comprises: a pressing force input portion configured to receive pressing force to make the developer carrier contact the image carrier; and a spacing force input portion configured to receive spacing force to make the developing device move from the contacting position to the spaced position. At least one of the pressing force input portion and the spacing force input portion comprises a terminal electrically connected to the memory element.

Abstract: Provided is a method of orienting a printer chip to enable interoperation between the printer chip and more than one type of printer. The printer chip has a plurality of sets of contacts, each set of contacts capable of interoperation with a different type of printer, cartridge, or photoconductor unit. The chip is installed on the cartridge with the chosen set of contacts oriented to mate with the electrical contacts in the printer cartridge receiving cavity of the printer. The result is a printer chip that can be installed on a printer cartridge or photoconductor unit in a plurality of orientations in order to allow the printer cartridge or photoconductor unit to interoperate with a plurality of types of printers, or allow a plurality of types of printer cartridges or photoconductor units to interoperate with a printer.

Abstract: A developing cartridge having a memory unit and an image forming apparatus in which the developing cartridge is separably installed. Once the developing cartridge is installed in the image forming apparatus, the memory unit of the developing cartridge is arranged to face a recording medium delivery path. The memory unit is connectable to a connection unit of a board placed in a lower region of the image forming apparatus.

Abstract: The present invention provides a configuration in which an electrically connected condition can further be stabilized in electrical-connection zones between a body of an image-forming apparatus, and an image-forming unit and a plurality of image-forming cartridges. Developing electrode members 161 and wire power-feed electrodes 162 are attached to a slide frame 140. Each of the developing electrode members 161 has a first body-side contact 161e3. The developing electrode members 161 are electrically connected with developing-roller output terminals 171 through contact with the developing-roller output terminals 171. The wire power-feed electrodes 162 are electrically connected with wire output terminals 172 through contact with the wire output terminals 172. The developing electrode members 161 are elastically deformed as a result of their first body-side contacts 161e3 being pressed in an M2 direction, which is along a slide direction S, by the developing-roller output terminals 171.

Abstract: The image forming device includes a main body and a cartridge that is detachably mountable on the main body. The cartridge includes the image bearing member, the first and second cleaning roller, and the state changing unit. The first cleaning roller cleans the image bearing member and the second cleaning roller cleans the first cleaning roller. The state changing unit is configured to irreversibly change an electrically disconnected state between the first cleaning roller and the second cleaning roller into an electrically connected state between the first cleaning roller and the second cleaning roller. The resetting unit is configured to reset the cumulative value when the current detecting unit does not detect current before the image bearing member rotates and detects current after the image bearing member rotates.

Abstract: An image forming apparatus includes a placement tray, an image forming unit, a drive unit, a control board, a power supply substrate, a high-voltage board, and low-voltage power supply harnesses. The placement tray holds a recording sheet thereon. The image forming unit forms an image on the recording sheet. The drive unit supplies driving force to the image forming unit. The control board controls the drive unit. The power supply substrate supplies electric power to the control board. The high-voltage board is disposed in one side of the placement tray. In the high-voltage board, voltage is generated higher than voltage in the power supply substrate. The low-voltage power supply harnesses are disposed in another side of the placement tray so as to supply electric power from the power supply substrate to the control board.

Abstract: An image forming apparatus is described. The image forming apparatus may include: a main body provided with an accommodation chamber partitioned by an inner side surface; a photosensitive unit configured to slid between an accommodated position and a drawn position; a first electrode disposed on a first outer side surface on the photosensitive unit; a second electrode disposed on a second outer side surface on the photosensitive unit to protrude toward the inner side surface beyond the first outer side surface; a third electrode disposed on a first inner side surface on the inner side surface; and a fourth electrode disposed on a second inner side surface on the inner side surface to protrude toward the photosensitive unit beyond the first inner side surface.

Abstract: A fixing device includes: a fixing device main body; a heating member that is installed in the fixing device main body and heats a developer image transferred to a recording medium; and a power line that supplies power to the heating member, the fixing device main body including a first retaining part and a second retaining part formed following the first retaining part, and the heating member being retained by the first retaining part and the power line being retained by the second retaining part.