Process cartridge

Abstract

A process cartridge (100), detachably installed in an image forming apparatus, the image forming apparatus being provided with an output electrode therein. The process cartridge (100) comprises: a photosensitive frame (21); a charging roller (24), disposed on the photosensitive frame (21) in an X direction; a charging roller electrode (25), configured to receive power from the output electrode and transmit the power to the charging roller (24), the charging roller electrode (25) being retractably disposed on the photosensitive frame (21); and an elastic member (27), configured to cause the charging roller electrode (25) to have a tendency to extend outwards relative to the photosensitive frame (21). When the charging roller electrode (25) is in abutment with the output electrode, the charging roller electrode (25) retracts inwards relative to the photosensitive frame (21), and the elastic member (27) stores force, so that the charging roller electrode (25) is maintained in abutment with the output electrode under the action of the elastic member (27). After the process cartridge (100) is installed in place, the charging roller electrode (25) slightly retracts inwards under contact with the output electrode and maintains elastic abutment with the output electrode, thereby avoiding abrasion caused by rigid contact between the charging roller electrode and the output electrode, and prolonging the service life of the process cartridge (100).

Description

A processing cartridge

[0001] This application claims priority to 2 pieces of Chinese patent applications, one of which was filed on June 04, 2024 with the Chinese Patent Office and assigned application number 202421275080.7, and titled "A processing cartridge", and the other of which was filed on April 10, 2024 with the Chinese Patent Office and assigned application number 202420741772.X, and titled "A processing cartridge", the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to the field of electronic imaging equipment, in particular to a processing cartridge. BACKGROUND

[0003] The processing cartridge is an important component for imaging in the image forming device (such as a printer) and is detachably installed. In the prior art, the processing cartridge has a photosensitive frame and a developing frame. The photosensitive frame and the developing frame are respectively provided with electrodes connected to a charging roller and a developing roller, which are respectively a charging roller electrode and a developing roller electrode. The charging roller electrode receives power from the image forming device and transmits it to the photosensitive drum. The developing roller electrode receives power from the image forming device and transmits it to the developing roller. The photosensitive drum and the developing roller rotate relative to each other to form a potential difference, thereby performing normal printing work.

[0004] The end of the photosensitive frame of the existing processing cartridge is provided with a protrusion. The charging roller electrode is installed on the protrusion and can be in contact with the output electrode of the image forming device to receive power. The charging roller electrode and the output electrode are in rigid contact, which can easily cause the electrodes to wear and thin. After the electrodes wear and thin, they cannot be normally contacted, which is not conducive to the long-term use of the processing cartridge.

[0005] In addition, in the prior art, the developing frame is provided with a detachable end cover, and the developing roller electrode is installed on the end cover. The photosensitive frame is provided in an integrated structure, and the charging roller electrode is installed on the photosensitive frame and cannot be detached alone. If the charging roller electrode installed on the photosensitive frame is damaged, the photosensitive frame needs to be disassembled to a large extent for repair. Moreover, the charging roller electrode is always exposed, and the longer the repair time, the higher the risk of damage. Therefore, the prior art has the defect of low repair performance. SUMMARY

[0006] To solve at least one of the above technical problems, the present application provides a processing cartridge which is detachably installed in an image forming device provided with an output electrode. The processing cartridge comprises:

[0007] a photosensitive frame;

[0008] a charging roller arranged on the photosensitive frame along an X direction;

[0009] A charging roller electrode is arranged on the photosensitive frame and is arranged to be retractable, the charging roller electrode is arranged to receive power from the output electrode and to transmit power to the charging roller, and the charging roller electrode is arranged to be retractable relative to the photosensitive frame.

[0010] An elastic member is arranged to cause the charging roller electrode to have a tendency to extend outward relative to the photosensitive frame, and the charging roller electrode is arranged to retract inward relative to the photosensitive frame when the charging roller electrode is in abutment with the output electrode, and the elastic member is arranged to store energy so that the charging roller electrode remains in abutment with the output electrode under the force of the elastic member.

[0011] The charging roller electrode is arranged to retract slightly inward under the abutment of the output electrode when the processing cartridge is installed in place and to remain in elastic abutment with the output electrode, thereby avoiding rigid contact between the two and wear, and thereby extending the service life of the processing cartridge.

[0012] In some embodiments, the charging roller electrode is arranged on the photosensitive frame along a first axis;

[0013] The photosensitive frame is arranged with a protrusion, and the protrusion is arranged with a guide slope, and the guide slope is arranged to be inclined relative to the X direction.

[0014] The processing cartridge further comprises a movable member and a linkage member, the first end of the movable member is connected to the charging roller electrode, and the second end of the movable member is connected to the linkage member, and the movable member and the linkage member are arranged to be retractable on the photosensitive frame, and the movable member is arranged to be able to swing about the first axis while moving along the guide slope, and the linkage member is arranged to act with a guide rail of the image forming apparatus so as to move relative to the photosensitive frame from a first position to a second position.

[0015] When the processing cartridge is not installed, the movable member is in abutment with the guide slope so as to be in a retracted position relative to the photosensitive frame, the charging roller electrode is in the retracted position with the movable member, and the linkage member is in the first position, and when the processing cartridge is installed in the image forming apparatus, the linkage member is in abutment with the guide rail of the image forming apparatus and moves from the first position to the second position, thereby causing the movable member to swing about the first axis and move along the guide slope so that the movable member extends outward relative to the photosensitive frame, and the charging roller electrode extends outward relative to the photosensitive frame with the movable member, and when the processing cartridge is installed in place, the charging roller electrode is in abutment with the output electrode, causing the charging roller electrode to retract inward relative to the photosensitive frame, and the elastic member stores energy, causing the charging roller electrode to remain in abutment with the output electrode under the force of the elastic member, and the movable member retracts inward relative to the photosensitive frame with the charging roller electrode.

[0016] In some embodiments, the first axis is parallel to the X direction, and the retractable direction of the movable member and the charging roller electrode relative to the photosensitive frame is parallel to the X direction.

[0017] In some embodiments, the linkage member is arranged to move from the first position to the second position relative to the photosensitive frame in the +Z direction.

[0018] The elastic member is further configured to cause the linkage member to have a tendency to move in the -Z direction; after the process cartridge is detached, the linkage member is separated from the guide rail and is reset from the second position to the first position in the -Z direction under the action of the elastic member.

[0019] In some embodiments, the first end of the movable member is fixedly connected with the charging roller electrode;

[0020] The second end of the movable member is movably connected with the linkage member, the movable member is configured to extend in a direction perpendicular to the X direction, and the linkage member is configured to be movable relative to the extending direction of the movable member.

[0021] In some embodiments, the protrusion is formed on the inner side of the photosensitive frame, the movable member is arranged inside the photosensitive frame, the charging roller electrode is exposed outward through the side wall of the photosensitive frame, and the linkage member is exposed outward through the first hole on the photosensitive frame and is movable in the first hole between the first position and the second position.

[0022] In some embodiments, the two ends of the elastic member are connected with the movable member and the photosensitive frame respectively.

[0023] In some embodiments, the movable member is made of an electrically conductive material, the process cartridge further comprises an electrically conductive sheet, the charging roller electrode, the movable member and the electrically conductive sheet are electrically connected in sequence, and the electrically conductive sheet transmits power to the charging roller.

[0024] In some embodiments, the protrusion has an abutting side wall on at least one side of the guide slope;

[0025] The electrically conductive sheet comprises an electrically conductive slope and at least one first abutting portion, the electrically conductive slope is arranged on the guide slope, and the first abutting portion is arranged on the abutting side wall;

[0026] The movable member has an abutting slope and a second abutting portion on at least one side of the abutting slope; the abutting slope can abut on the electrically conductive slope so that the movable member can move along the guide slope, and the second abutting portion is used for abutting with the first abutting portion;

[0027] After the process cartridge is installed in place, the charging roller electrode abuts against the output electrode, the charging roller electrode is retracted inward relative to the photosensitive frame, the movable member is retracted inward relative to the photosensitive frame along with the charging roller electrode, the abutting slope is separated from the electrically conductive slope, and the second abutting portion is retracted inward along with the movable member so as to move relative to the first abutting portion, the second abutting portion at least partially contacts the first abutting portion, so that the movable member and the electrically conductive sheet remain electrically connected.

[0028] In some embodiments, the first end of the charging roller electrode is arranged outside the photosensitive frame, the elastic member abuts between the first end of the charging roller electrode and the photosensitive frame, and the second end of the charging roller electrode is connected with the charging roller through the photosensitive frame.

[0029] The application further provides a processing box which is detachably installed in an image forming device, comprising:

[0030] A developing unit comprising a developing frame and a developing roller, the developing roller being installed in the developing frame;

[0031] A drum unit comprising a photosensitive frame, a charging roller and a charging roller electrode, the charging roller being installed in the photosensitive frame, and the charging roller electrode being used to receive power from the image forming device and transmit the power to the charging roller; and

[0032] A mounting portion which is detachably arranged at an end of the photosensitive frame, and the charging roller electrode is arranged on the mounting portion.

[0033] In some embodiments, the developing unit further comprises a driving side end cover and a developing roller electrode, the driving side end cover being detachably arranged at an end of the developing frame, and the developing roller electrode being arranged on the driving side end cover.

[0034] The driving side end cover is integrally formed with the mounting portion, or the driving side end cover is separately arranged from the mounting portion.

[0035] In some embodiments, the mounting portion is provided with a second protruding portion and a third hole, a first end of the charging roller electrode is arranged on the second protruding portion, and a second end of the charging roller electrode extends into the photosensitive frame through the third hole and is in conductive connection with the charging roller.

[0036] In some embodiments, the first end of the charging roller electrode is a clamping portion, and the second end is a conductive portion, the clamping portion is clamped with the second protruding portion for fixing the charging roller electrode, and the conductive portion is in conductive connection with the charging roller through the third hole.

[0037] The conductive portion comprises a first folding portion and a second folding portion, the first folding portion is attached to the mounting portion, and the second folding portion is in conductive connection with the charging roller through the third hole.

[0038] In some embodiments, the charging roller electrode is in conductive connection with the charging roller through a charging roller spring, and the second folding portion is provided with a bayonet, and the charging roller spring is clamped with the bayonet. BRIEF DESCRIPTION OF DRAWINGS

[0039] FIG. 1 is a structural schematic view of the processing box according to the first embodiment of the application;

[0040] FIG. 2 is a structural exploded view of the processing box according to the first embodiment of the application;

[0041] FIG. 3 is a structural schematic view of the drum unit according to the first embodiment of the application;

[0042] FIG. 4 is a structural exploded view of the developing unit at the driving end according to the first embodiment of the application;

[0043] FIG. 5 is a schematic view of the linkage rod and the charging roller electrode according to the first embodiment of the application;

[0044] Fig. 6 is a schematic view of the drum unit of the present application in a mounted state;

[0045] Fig. 7 is an enlarged view of portion A in Fig. 6;

[0046] Fig. 8 is a schematic view of the structure of the conductive sheet of the present application;

[0047] Fig. 9 is a schematic view of the drum unit of the present application in an unmounted state;

[0048] Fig. 10 is a schematic view of the conductive sheet cooperating with the linkage lever after the linkage lever is moved;

[0049] Fig. 11 is an exploded view of the partial structure of the driving side of the drum unit of the present application;

[0050] Fig. 12 is an exploded view of the partial structure of the driving side of the drum unit of the present application from another perspective;

[0051] Fig. 13 is a schematic view of the structure of the drum unit of the present application in an embodiment two;

[0052] Fig. 14 is a schematic view of the structure of the drum unit of the present application in an embodiment two;

[0053] Fig. 15 is a schematic view of the drum unit of the present application in an embodiment two from another perspective;

[0054] Fig. 16 is a schematic view of the structure of the process cartridge of the present application in an embodiment three;

[0055] Fig. 17 is a schematic view of the structure of the process cartridge of the present application in an embodiment three;

[0056] Fig. 18 is a schematic view of the structure of the drum unit of the present application in an embodiment three;

[0057] Fig. 19 is a schematic view of the driving end of the process cartridge of the present application in an embodiment three, omitting the driving side end cover and the charging roller electrode;

[0058] Fig. 20 is a schematic view of the structure of the charging roller electrode of the present application in an embodiment three;

[0059] Fig. 21 is a schematic view of the structure of the driving end of the process cartridge of the present application in an embodiment three;

[0060] Fig. 22 is a schematic view of the structure of the driving end of the process cartridge of the present application in an embodiment three;

[0061] Fig. 23 is a schematic view of another embodiment of the mounting portion of the process cartridge of the present application in an embodiment three.

[0062] 100 - process cartridge, 101 - driving end, 102 - non-driving end, 1 - developing unit, 11 - developing frame, 111 - powder tank, 12 - developing roller, 13 - developing gear, 14 - idler, 15 - driving side end cover, 151 - mounting portion, 152 - second protruding portion, 153 - third hole, 16 - non-driving side end cover, 17 - developing roller electrode, 2 - drum unit, 21 - photosensitive frame, 211 - waste powder tank, 212 - first hole, 213 - protruding portion, 2131 - guide slope, 2132 - abutting side wall, 214 - second hole, 22 - photosensitive drum, 221 - power receiving portion, 222 - photosensitive gear, 23 - spring, 24 - charging roller, 25 - charging roller electrode, 251 - claw portion, 252 - conductive portion, 2521 - first folding portion, 2522 - second folding portion, 2523 - bayonet, 26 - conductive sheet, 261 - first abutting portion, 262 - conductive slope, 27 - first elastic member, 28 - second elastic member, 29 - linkage lever, 291 - linkage, 214 - first hook portion, 292 - second hook portion, 293 - second abutting portion, 294 - abutting slope, 295 - guide groove, 281 - clamping groove. DETAILED DESCRIPTION

[0063] The application will be further described in conjunction with the drawings, obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the application.

[0064] It should be noted that the terms "first", "second" and the like are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0065] In the application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection; it can be direct connection, or indirect connection through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0066] In the present application, unless otherwise explicitly specified and limited, a first feature is "on" or "under" a second feature can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature can be "over", "above" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature can be "under", "below" and "underneath" the second feature can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0067] In the above description, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0068] The present application relates to a process cartridge 100 which is detachably mountable in an image forming apparatus including, for example, an electrophotographic copying machine, an electrophotographic printer (LED printer, laser printer, etc.), a facsimile machine of an electrophotographic printer type, and the like.

[0069] The present application will be described in further detail below with reference to the accompanying drawings.

[0070] Embodiment 1

[0071] Fig. 1 schematically shows a process cartridge 100 according to an embodiment of the present application. For the convenience of description, the length direction of the process cartridge 100 is taken as the X-axis direction, the driving side of the process cartridge 100 is taken as the +X-axis direction, the non-driving side of the process cartridge 100 is taken as the -X-axis direction, the width direction of the process cartridge 100 is taken as the Y-axis direction including the +Y-axis direction and the -Y-axis direction, and the height direction of the process cartridge 100 is taken as the Z-axis direction including the +Z-axis direction and the -Z-axis direction, the three-axis directions being orthogonal to each other. Among them, the process cartridge 100 has a driving end 101 in the +X-axis direction for receiving power from an image forming apparatus, and a non-driving end 102 at one end thereof in the -X-axis direction, as shown in Fig. 2, the process cartridge 100 including a developing unit 1 and a drum unit 2.

[0072] As shown in FIG. 2 and FIG. 4, the developing unit 1 comprises a developing frame 11, a developing roller 12, a developing gear 13, an idler gear 14, a driving side end cover 15 and a non-driving side end cover 16. The developing frame 11 is generally rectangular body structure, and has a powder bin 111 inside for accommodating toner, and a stirring frame (not shown) is installed in the powder bin 111 for stirring the toner in the powder bin 111 to prevent caking. The developing roller 12 is rotatably installed at the powder outlet of the developing frame 11, and the axial direction of the developing roller 12 is parallel to the X-axis direction. The developing gear 13 is coaxially arranged at the +X-axis side of the developing roller 12, and can transmit the received driving force to the developing roller 12. The idler gear 14 is rotatably arranged at the +X-axis side of the developing frame 11, and can engage with the developing gear 13. The idler gear 14 is used to transmit the driving force for stirring the stirring frame, and the stirring frame can rotate through the idler gear 14 when the developing gear 13 rotates. The driving side end cover 15, i.e., the developing end cover, is detachably arranged at the +X-axis side of the developing frame 11, and can surround the driving gears such as the developing gear 13 and the idler gear 14. The developing roller 12 is rotatably supported on the driving side end cover 15. The non-driving side end cover 16 is arranged at the non-driving end 102, and is detachably connected at the -X-axis side of the developing frame 11.

[0073] As shown in FIG. 2 and FIG. 3, the drum unit 2 comprises a photosensitive frame 21, a photosensitive drum 22, a charging roller spring 23 and a charging roller 24. The photosensitive frame 21 is an open shell structure, which can rotatably support the photosensitive drum 22 and the charging roller 24. The photosensitive frame 21 has a waste powder bin 211 for storing waste powder from the photosensitive drum 22. The photosensitive frame 21 can be connected with the driving side end cover 15, and the driving side end cover 15 can connect the photosensitive frame 21 with the developing unit 1. In the X-axis direction, the driving side end cover 15 can cover part of the photosensitive frame 21. The photosensitive drum 22 is rotatably installed in the photosensitive frame 21. The +X-axis side of the photosensitive drum 22 has a power receiving portion 221 for receiving power from the image forming apparatus, so that the photosensitive drum 22 can be driven to rotate. The axial direction of the photosensitive drum 22 and the charging roller 24 is parallel to the X-axis direction. The charging roller 24 abuts against the photosensitive drum 22 for charging the photosensitive drum 22. The two ends of the charging roller 24 in the X-axis direction abut against the charging roller spring 23, which abuts against the photosensitive frame 21 for providing the charging roller 24 with pressure for abutting against the photosensitive drum 22, and also has a conductive effect. The +X-axis side of the photosensitive drum 22 is coaxially provided with a photosensitive gear 222, which can be driven to rotate by the power receiving portion 221. The photosensitive frame 21 is further provided with a charging roller electrode 25, which is in contact with the electrode of the image forming apparatus for electric conduction. The charging roller 24 is in electric conduction with the charging roller electrode 25 for transmitting power to the photosensitive drum 22. When the process cartridge 100 is installed in the image forming apparatus, the power output shaft (not shown) of the image forming apparatus is connected with the power receiving portion 221. Meanwhile, the photosensitive gear 222 and the developing gear 13 are in meshing with each other for transmitting the power received by the power receiving portion 221 to the developing roller 12, so that the photosensitive drum 22 and the developing roller 12 rotate relatively to form a potential difference for electrostatic imaging.

[0074] In order to avoid the rigid contact between the charging roller electrode 25 and the electrode of the image forming apparatus when the process cartridge 100 is installed, the charging roller electrode 25 of the present embodiment is provided in a structure capable of elastically contacting the output electrode of the image forming apparatus. On the one hand, this can avoid the wear caused by the rigid contact of the charging roller electrode 25. On the other hand, the charging roller electrode 25 can ensure the effectiveness of electric conduction through elastic contact, and avoid the poor contact during electric conduction.

[0075] In the present embodiment, as shown in FIG. 5, the process cartridge 100 further comprises a movable member 29. As shown in FIG. 7, the photosensitive frame 21 further has a conductive sheet 26 and an elastic member, which is specifically a first elastic member 27 in the present embodiment. Both of them are arranged on the +X-axis side of the photosensitive frame 21. The charging roller electrode 25 transmits power to the charging roller 24 through the movable member 29 and the conductive sheet 26.

[0076] Specifically, as shown in FIG. 6, the movable member 29 is roughly in the shape of a rod with corners, made of conductive material, and is telescopically arranged on the photosensitive frame 21. The movable member 29 has two ends, one end away from the developing unit 1 is the first end, and the first end is connected with the charging roller electrode 25. The end close to the developing unit 1 is the second end, and the second end is connected with the linkage member 291. The linkage member 291 is movably arranged on the movable member 29. The movable member 29 extends along a direction perpendicular to the X direction, and the linkage member 291 can slide on the movable member 29 along the extension direction of the movable member 29. Specifically, the movable member 29 is provided with a guide groove 295 extending along the extension direction of the movable member 29, and the linkage member 291 is slidably arranged in the guide groove 295. In order to ensure the strength of the linkage member 291, the linkage member 291 can be made of non-conductive material. When the process cartridge 100 is installed, the linkage member 291 can abut against the guide rail of the image forming apparatus to drive the movable member 29 to move along the +Z direction, thereby driving the linkage member 291 and the charging roller electrode 25 to move along the +X direction. The photosensitive frame 21 is further provided with a first hole 212 located on the +X axis side of the photosensitive frame 21 and penetrating the side wall of the photosensitive frame 21. The first hole 212 has a height dimension in the Z axis direction, and the linkage member 291 can be inserted into the first hole 212 and move along the first hole 212, that is, the movement direction of the linkage member 291 after abutting against the guide rail is limited through the first hole 212. At the same time, the linkage member 291 can be telescopically arranged in the first hole 212 relative to the photosensitive frame 21 along the X direction, thereby driving the movable member 29 to telescopically arrange relative to the photosensitive frame 21 along the X direction.

[0077] Specifically, when the process cartridge 100 is installed, the linkage member 291 can abut against the guide rail of the image forming apparatus, and the first hole 212 moves along the +Z direction from the first position to the second position, thereby driving the movable member 29 to swing around the axis (i.e. the first axis L) of the charging roller electrode 25 connected at the first end thereof. In FIG. 9, the linkage member 291 is located at the first position, and in FIG. 6, the linkage member 291 is located at the second position. In this embodiment, the first hole 212 is a straight hole. When the linkage member 291 moves along the +Z direction from the first position to the second position in the first hole 212, the movable member 29 swings around the axis of the charging roller electrode 25, and at the same time, the linkage member 291 slides along the extension direction of the movable member 29 to the direction close to the first end of the movable member 29. In other embodiments, the second hole 212 can be an arc-shaped hole, and the shape of the second hole 212 corresponds to the arc swing track of the second end of the movable member 29. At this time, the linkage member 291 slides along the arc in the second hole 212, and the linkage member 291 does not have to be arranged to be able to slide along the extension direction of the movable member 29.

[0078] The charging roller electrode 25 has a columnar structure, and has a first axis L. The charging roller electrode 25 is telescopically arranged on the photosensitive frame 21 along the first axis L, and can rotate relative to the photosensitive frame 21 around the first axis L. In the embodiment, the first axis L is parallel to the X direction. The movable piece 29 is fixedly connected with the charging roller electrode 25, and is preferably integrally designed with the charging roller electrode 25. Specifically, the photosensitive frame 21 is provided with a second hole matched with the charging roller electrode 25, so that the charging roller electrode 25 can telescopically and rotatably move relative to the photosensitive frame 21 along the X direction. When the electrode of the image forming device abuts against the charging roller electrode 25, the charging roller electrode 25 can be subjected to a force in the -X direction, and is retracted in the -X direction.

[0079] As shown in FIG. 7, the first elastic member 27 is used to provide the charging roller electrode 25 with a restoring force and an elastic contact force. The first elastic member 27 is preferably a tension spring. The first elastic member 27 is arranged on the photosensitive frame 21 and connected with the movable piece 29. Specifically, the first elastic member 27 is arranged on the inner side of the photosensitive frame 21. The photosensitive frame 21 is provided with a first hook portion 214, and the movable piece 29 is provided with a second hook portion 292. One end of the first elastic member 27 is connected with the first hook portion 214, and the other end of the first elastic member 27 is connected with the second hook portion 292. The first elastic member 27 can provide the movable piece 29 with a restoring tension. Specifically, in the X direction, the first elastic member 27 is used to make the charging roller electrode 25 have a tendency to extend outward relative to the photosensitive frame 21. When the charging roller electrode 25 abuts against the output electrode of the image forming device, the charging roller electrode 25 is retracted inward relative to the photosensitive frame 21, i.e., is retracted into the interior of the photosensitive frame 21, specifically, is retracted in the -X direction. The first elastic member 27 is charged in the X direction, so that the charging roller electrode 25 has a tendency to extend outward under the action of the first elastic member 27, thereby maintaining abutment with the output electrode. In the Z direction, the first elastic member 27 is used to make the movable piece 29 and the linkage 291 have a tendency to move in the -Z direction. When the process cartridge 100 is detached, the linkage 291 is away from the guide rail, and is reset from the second position to the first position in the -Z direction under the pulling action of the first elastic member 27 on the movable piece 29.

[0080] Referring to FIG. 11, the photosensitive frame 21 is provided with a protrusion 213. Specifically, the protrusion 213 is a structure protruding along the -X axis direction. The protrusion 213 is a triangular structure with a guide slope 2131. It can be understood that the guide slope 2131 causes the volume of the protrusion 213 to gradually decrease along the -X axis direction and gradually decrease along the +Z axis direction. The protrusion 213 has an abutting side wall 2132 on at least one side of the guide slope 2131. In this embodiment, the protrusion 213 has an abutting side wall 2132 on each side of the guide slope 2131. The movable piece 29 can abut on the protrusion 213 and can slide along the guide slope 2131, while oscillating around the first axis L of the charging roller electrode 25.

[0081] As shown in FIG. 9, in the initial state before the processing cartridge 100 is installed, the first elastic member 27 has a force on the movable piece 29 in the -Z direction, so that the movable piece 29 abuts on the guide slope 2131 at a position close to the -Z direction. At this time, the linkage 291 and the charging roller electrode 25 are in a retracted state in the X direction, i.e., the linkage 291 and the charging roller electrode 25 are close to the -X direction. The linkage 291 is located on the -Z axis side (lower side) of the first hole 212. The charging roller electrode 25 is in a retracted position relative to the photosensitive frame 21, avoiding exposure of the charging roller electrode 25 outside the photosensitive frame 21 to generate collision and wear with the outside. When the linkage 291 is moved in the +Z axis direction by an external force of the guide rail, the movable piece 29 moves in the +Z direction along the guide slope 2131 and oscillates around the first axis L, so that the movable piece 29 as a whole moves in the +X axis direction, causing the charging roller electrode 25 to extend outward from the photosensitive frame 21 in the +X direction. At this time, the first elastic member 27 is stretched to store elastic potential energy. The linkage 291 is located on the +Z axis side (upper side) of the first hole 212. After the processing cartridge 100 is disassembled, the linkage 291 is disengaged from the guide rail. The movable piece 29 reversely oscillates around the first axis L to reset under the action of the first elastic member 27. The linkage 291 resets in the -Z direction.

[0082] As shown in FIG. 8, the conductive sheet 26 is used to transmit power to the charging roller 24, the first end of the conductive sheet 26 is clamped on the protruding part 213 to achieve self-force support and receive power, and the second end of the conductive sheet 26 is in abutment with the charging roller spring 23 to transmit power to the charging roller 24. Among them, the part of the conductive sheet 26 clamped with the protruding part 213 can be in abutment with the movable piece 29, that is, in this embodiment, the conductive sheet 26 is clamped between the protruding part 213 and the movable piece 29 to receive power from the movable piece 29. In order to cater to the structure of the protruding part 213 and facilitate the swinging mode of the movable piece 29, the first end of the conductive sheet 26 clamped with the protruding part 213 is also roughly triangular with an inclined surface, please refer to FIG. 8, FIG. 11 and FIG. 12, specifically, the conductive sheet 26 has a first abutment part 261 and a conductive inclined surface 262, the first abutment part 261 and the conductive inclined surface 262 extend transversely, the conductive inclined surface 262 is arranged on the guide inclined surface 2131, the first abutment part 261 has a length in the X-axis direction, which is arranged on the abutment side wall 2132 of the protruding part 213 towards the Y direction, and the first abutment part 261 has at least one, in this embodiment, the first abutment part 261 has two, which are arranged on the two abutment side walls 2132 respectively.

[0083] Correspondingly, please refer to FIG. 5, FIG. 11 and FIG. 12, the movable piece has an abutment inclined surface 294 and a second abutment part 293 located on at least one side of the abutment inclined surface 294, in this embodiment, the second abutment part 293 has two, which are located on the two sides of the abutment inclined surface 294 respectively. The abutment inclined surface 294 can abut on the conductive inclined surface 262 to enable the movable piece 29 to move along the guide inclined surface 2131, and the second abutment part 293 is used to abut with the first abutment part 261. The conductive inclined surface 262 is designed integrally with the first abutment part 261, the conductive inclined surface 262 can fit and cover the guide inclined surface 2131 of the protruding part 213, and when the conductive inclined surface 262 abuts with the abutment inclined surface 294, the conductive inclined surface 262 and the abutment inclined surface 294 can contact conductive.

[0084] After the movable piece 29 drives the charging roller electrode 25 to extend out of the photosensitive frame 21, as the process cartridge 100 is installed in place, the charging roller electrode 25 abuts with the output electrode, since the charging roller electrode 25 is movably arranged on the photosensitive frame 21, the charging roller electrode 25 moves under the force of the output electrode of the image forming device and drives the movable piece 29 and the linkage 291 to slightly retract along the -X-axis direction, at this time, the abutment inclined surface 294 moves along the -X direction, causing the abutment inclined surface 294 to possibly disengage from the conductive inclined surface 262, but since the first abutment part 261 and the second abutment part 293 coincide more in the X-axis direction, even if the movable piece 29 slightly retracts along the -X-axis direction, at this time, at least part of the first abutment part 261 and the second abutment part 293 can still maintain abutment to realize contact conductive.

[0085] Working principle: Before the installation of the process cartridge 100, the tension of the first elastic member 27 makes the movable member 29 keep abutting against the -X axis and -Z axis side of the guide slope 2131 of the protruding portion 213, and the linkage member 291 and the charging roller electrode 25 are in the retracted state in the X direction (i.e. close to the -X direction). After the installation of the process cartridge 100, the guide rail of the image forming apparatus abuts against the linkage member 291 to make the linkage member 291 move along the +Z axis direction and drive the movable member 29 to move together, and at the same time, the movable member 29 is driven by the guide slope 2131 to make the movable member 29 swing around the first axis L of the charging roller electrode 25 along the conductive slope 262 of the conductive sheet 26 through the abutting slope 294, so that the movable member 29 moves along the guide slope 2131 to the +X direction and +Z direction, and the linkage member 291 and the charging roller electrode 25 move along the +X axis direction as a whole, so that the linkage member 291 and the charging roller electrode 25 extend to the +X direction, and then the process cartridge 100 is installed in place by closing the door cover of the image forming apparatus, the charging roller electrode 25 abuts against the output electrode of the image forming apparatus, and the charging roller electrode 25 is driven to retract by the force of the output electrode in the -X axis direction, and at the same time, the movable member 29 is driven to retract together, as shown in FIG. 10, so that the abutting slope 294 is disengaged from the conductive slope 262, and the second abutting portion 293 slides along the -X axis relative to the first abutting portion 261 and keeps abutting against at least a part of the first abutting portion 261, so that the movable member 29 can continuously transmit power to the conductive sheet 26. At the same time, the retraction of the charging roller electrode 25 in the -X direction makes the first elastic member 27 store power, and under the action of the force of the first elastic member 27, the charging roller electrode 25 continuously contacts the output electrode of the image forming apparatus. Similarly, after the disassembly of the process cartridge 100, the linkage member 291 is disengaged from the guide rail, and the movable member 29 swings around the first axis L in the reverse direction to reset under the action of the first elastic member 27, the linkage member 291 resets in the -Z direction, and the charging roller electrode 25 is in the retracted state.

[0086] In summary, when the process cartridge 100 is not installed, the charging roller electrode 25 is in the retracted state to avoid collision and wear with the outside world, during the installation of the process cartridge 100, the charging roller electrode 25 extends to the outside of the photosensitive frame in the +X direction to contact the output electrode of the image forming apparatus, when the door cover of the image forming apparatus is closed to install the process cartridge 100 in place, the charging roller electrode 25 slightly retracts inward under the abutment of the output electrode and keeps in elastic abutment with the output electrode to avoid rigid contact between the two to cause wear, and when the process cartridge 100 is disassembled, the charging roller electrode 25 returns to the retracted state as when the process cartridge 100 is not installed.

[0087] Therefore, before the processing cartridge 100 is installed, the charging roller electrode 25 is retracted in the photosensitive frame, avoiding the problem of exposure of the charging roller electrode 25 to the outside of the processing cartridge 100 before installation, which is touched and worn by the outside. On the other hand, the charging roller electrode 25 can also elastically abut against the electrode of the image forming device, avoiding the problem of wear caused by rigid contact between the two, effectively prolonging the service life of the charging roller electrode 25.

[0088] Embodiment Two

[0089] As shown in FIGS. 13-15, the present embodiment is mostly the same as that of Embodiment One, except that the processing cartridge 100 of the present embodiment does not provide a movable member, a linkage member, and a conductive sheet, the charging roller electrode 25 of the present embodiment directly conducts electricity with the charging roller 24, and also can achieve elastic abutment with the electrode of the image forming device. Unlike the charging roller electrode 25 of Embodiment One, which is retracted in the initial state, and undergoes a movement trajectory of retraction- extension- slight retraction after being installed from not being installed to being installed in place, the charging roller electrode 25 of the present embodiment is extended in the initial state, and only has a movement trajectory of extension- slight retraction after being installed from not being installed to being installed in place.

[0090] Specifically, as shown in FIG. 14, the elastic member of the present embodiment is a second elastic member 28, which is preferably a spring. The second elastic member 28 is telescopically arranged on the side wall of the photosensitive frame 21 on the +X axis side. One end of the second elastic member 28 abuts against the photosensitive frame, and the other end thereof abuts against the charging roller electrode 25. Preferably, a clamping groove 281 is provided on the side wall of the photosensitive frame 21, and the second elastic member 28 is clamped in the clamping groove 281, so as to position the second elastic member 28, avoiding deviation of the second elastic member 28 when compressed. The charging roller electrode 25 of the present embodiment adopts a bent metal sheet structure, which is movably arranged on the photosensitive frame 21. A second end of the charging roller electrode 25 is connected with the charging roller spring 23, so as to transmit electricity to the charging roller 24. A first end (the end exposed on the side wall of the photosensitive frame 21) of the charging roller electrode 25 abuts against the second elastic member 28, so as to achieve elastic contact with the output electrode of the image forming device through the elastic force of the second elastic member 28. The charging roller electrode 25 passes through the side wall of the photosensitive frame 21 through a through hole structure to conduct electricity with the charging roller 24.

[0091] When in use, the processing cartridge 100 is installed to the image forming device, the door cover of the image forming device is closed to enable the processing cartridge 100 to be installed in place, the charging roller electrode 25 abuts against the output electrode of the image forming device and transmits electricity, the charging roller electrode 25 receives a force in the -X axis direction, the second elastic member 28 is compressed and stored with elastic force, and under the action of the second elastic member 28, the charging roller electrode 25 generates a counterforce in the +X axis direction, so as to be able to elastically abut against the electrode of the image forming device.

[0092] In some embodiments, the second elastic member 28 is arranged on the inner side of the photosensitive frame 21, the second elastic member 28 is preferably a tension spring, the charging roller electrode 25 extends out of the structure connected with the second elastic member 28 on the inner side of the photosensitive frame 21, the other end of the second elastic member 28 is connected with the photosensitive frame 21, so that the second elastic member 28 can still drive the charging roller electrode 25 to stretch and contract along the X-axis direction, the first end of the charging roller electrode 25 is exposed on the outer side of the photosensitive frame 21, so that the charging roller electrode 25 can also elastically stretch and contract on the photosensitive frame 21 after abutting against the electrode of the image forming device, and the problem of wear of the charging roller electrode 25 caused by rigid contact can still be avoided.

[0093] Embodiment three

[0094] As shown in FIGS. 21 and 22, in order to facilitate the disassembly and maintenance of the charging roller electrode 25 and the developing roller electrode 17, the charging roller electrode 25 and the developing roller electrode 17 are arranged on the developing unit 1 and specifically located at the driving end 101, so that the charging roller electrode 25 and the developing roller electrode 17 can be simultaneously disassembled without greatly disassembling the photosensitive frame 21 or the developing frame 11, thereby facilitating the maintenance and repair.

[0095] Specifically, the charging roller electrode 25 and the developing roller electrode 17 are arranged on the driving side end cover 15, the developing roller electrode 17 is sleeved on the driving side end cover 15, and the driving side end cover 15 can rotate to support the developing roller 12 and at the same time can make the developing roller electrode 17 electrically connected with the developing roller 12. Since the driving side end cover 15 can be detachably connected with the photosensitive frame 21 and the developing frame 11, the developing roller electrode 17 can be disassembled together when the driving side end cover 15 is disassembled along the +X-axis direction, so that the developing roller electrode 17 is separated from the developing roller 12. In this embodiment, the charging roller electrode 25 is also arranged on the driving side end cover 15, that is, the charging roller electrode 25 is not directly arranged on the photosensitive frame 21, and the charging roller electrode 25 is arranged in a separable manner with the photosensitive frame 21. Specifically, the driving side end cover 15 at least partially covers the end of the photosensitive frame 21 along the +X-axis direction, so that the driving side end cover 15 supports the charging roller electrode 25, and the charging roller electrode 25 extends to the charging roller 24 for electrical connection. Therefore, the charging roller electrode 25 can be disassembled and separated at the same time when the driving side end cover 15 is disassembled and separated, so that the charging roller electrode 25 is electrically disconnected with the charging roller 24. Thus, one component of the driving side end cover 15 can be directly disassembled to quickly disassemble the charging roller electrode 25 and the developing roller electrode 17, thereby saving the maintenance time.

[0096] Specifically, the driving side end cover 15 has a mounting portion 151, which can be understood as that the driving side end cover 15 is integrally formed with the mounting portion 151, the mounting portion 151 is an extension part on the driving side end cover 15 and close to the direction of the photosensitive frame 21, the mounting portion 151 can be detachably connected with the photosensitive frame 21, is located at the +X axis side of the photosensitive frame 21, in the X axis direction, the mounting portion 151 can cover part of the photosensitive frame 21, that is, the projection of the mounting portion 151 in the X axis direction coincides with the part projection of the photosensitive frame 21, wherein the projection of the mounting portion 151 in the X axis direction does not coincide with the projection of the developing roller electrode 17. The charging roller electrode 25 is arranged on the mounting portion 151, the projection of the charging roller electrode 25 in the X axis direction coincides with the projection of the mounting portion 151, the mounting portion 151 is provided with a second protruding portion 152 and a third hole 153, the second protruding portion 152 is a convex structure along the +X axis direction, which is provided with a groove to facilitate the clamping and fixing of the charging roller electrode 25, and part of the charging roller electrode 25 is exposed on the second protruding portion 152 to facilitate receiving power of the image forming device. The third hole 153 is an opening structure penetrating through the mounting portion 151, so that the first end of the charging roller electrode 25 can be clamped on the second protruding portion 152, and the second end of the charging roller electrode 25 can extend into the photosensitive frame 21 through the third hole 153 to abut against the charging roller 24, in the X axis direction, the projection of the third hole 153 does not coincide with the projection of the second protruding portion 152.

[0097] As shown in FIG. 19, the charging roller electrode 25 is made of a bent metal conductive material, and includes a clamping jaw portion 251 and a conductive portion 252. The clamping jaw portion 251 is formed in a hook shape by a bent edge structure, so as to be more suitable for clamping with the second protruding portion 152, so that the entire charging roller electrode 25 is fixed on the driving side end cover 15 through the clamping jaw portion 251, and then extends into the photosensitive frame 21 through the conductive portion 252 to conductively connect with the charging roller 24. Moreover, the end of the clamping jaw portion 251 at the +X axis side is used to contact with an output electrode in the image forming device to receive power. The conductive portion 252 includes a first folding portion 2521 and a second folding portion 2522, the first folding portion 2521 and the second folding portion 2522 form a bent structure, the first folding portion 2521 is integrally formed with the clamping jaw portion 251, and the first folding portion 2521 is attached to and exposed on the mounting portion 151, and the end of the second folding portion 2522 extends into the photosensitive frame 21 along the -X axis direction through the third hole 153 and abuts against the charging roller spring 23, so as to transmit power to the charging roller 24.

[0098] Further, a bayonet 2523 is arranged at one end of the second folding portion 2522 in the extension direction, the bayonet 2523 penetrates the edge of the second folding portion 2522 to form an open structure, facilitating the insertion of the charging roller spring 23 to conduct electricity, and at the same time, when the drive side end cover 15 is disassembled, the charging roller electrode 25 can be easily separated from the charging roller spring 23. When the pawl portion 251 of the charging roller electrode 25 receives power from the image forming device, the power is transmitted to the charging roller 24 through the conductive portion 252 and the charging roller spring 23, and the charging roller 24 is in contact with the surface of the drum cylinder of the photosensitive drum 22 to uniformly charge the photosensitive drum 22.

[0099] It can be seen that the developing roller electrode 17 and the charging roller electrode 25 of the present application are both arranged on the drive side end cover 15, rather than being directly connected to the developing frame 11 and the photosensitive frame 21, and the drive side end cover 15 is used as a disassembled carrier, so that when the drive side end cover 15 is disassembled, the developing roller electrode 17 and the charging roller electrode 25 can be disassembled together with the drive side end cover 15, and after disassembly, the developing roller electrode 17 and the charging roller electrode 25 are both exposed on the drive side end cover 15, facilitating maintenance. Compared with the prior art, the process of disassembling the charging roller electrode 25 is greatly shortened, and the photosensitive frame 21 does not need to be disassembled to a large extent, achieving a convenient and efficient maintenance method.

[0100] In some embodiments, as shown in FIG. 23, the mounting portion 151 is a separate part, i.e., the drive side end cover 15 is provided separately from the mounting portion 151, and the mounting portion 151 is detachably connected to the +X-axis side of the photosensitive frame 21, for example, the mounting portion 151 is clamped on the photosensitive frame 21, the charging roller electrode 25 is arranged on the mounting portion 151, the drive side end cover 15 is detachably connected to the photosensitive frame 21 and the developing frame 11, and the developing roller electrode 17 is arranged on the drive side end cover 15. When the electrodes need to be disassembled, the developing roller electrode 17 can be separated from the developing roller 12 by disassembling the drive side end cover 15, and then the charging roller electrode 25 can be separated from the photosensitive frame 21 by disassembling the mounting portion 151, thereby realizing the separation of the developing roller electrode 17 and the charging roller electrode 25 along the +X-axis direction in sequence, and achieving the effect of facilitating the disassembly and separation of the charging roller electrode 25.

[0101] The above only describes some embodiments of the present application. For those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, or the above technical solutions can be freely combined, including the free combination of technical features among the above different embodiments, which all belong to the protection scope of the present application.

Claims

1. A process cartridge detachably mounted in an image forming device, wherein the image forming device is provided with an output electrode, wherein: The processing box includes: Photosensitive frame; a charging roller, arranged on the photosensitive frame along the X direction; a charging roller electrode, configured to receive power from the output electrode and transmit the power to the charging roller, wherein the charging roller electrode is retractably disposed on the photosensitive frame; and An elastic member is used to make the charging roller electrode tend to extend outward relative to the photosensitive frame; when the charging roller electrode abuts the output electrode, the charging roller electrode retracts inward relative to the photosensitive frame, and the elastic member accumulates force so that the charging roller electrode remains in abutment with the output electrode under the action of the elastic member.

2. The process cartridge according to claim 1, wherein The charging roller electrode is arranged on the photosensitive frame along the first axis; The photosensitive frame is provided with a protrusion, the protrusion is provided with a guiding slope, and the guiding slope is inclined with respect to the X direction; The process cartridge further includes a movable member and a linkage member, wherein a first end of the movable member is connected to the charging roller electrode, and a second end of the movable member is connected to the linkage member; the movable member and the linkage member are retractably disposed on the photosensitive frame; the movable member is capable of swinging about the first axis while moving along the guide slope; the linkage member is configured to interact with a guide rail of the image forming device to thereby move from a first position to a second position relative to the photosensitive frame; When the processing box is not installed, the movable part abuts against the guide slope and is in a retracted position relative to the photosensitive frame, the charging roller electrode is in a retracted position along with the movable part, and the linkage part is in the first position; when the processing box is installed in the image forming device, the linkage part abuts against the guide rail of the image forming device and moves from the first position to the second position, driving the movable part to swing around the first axis and move along the guide slope, so that the movable part extends outward relative to the photosensitive frame, and the charging roller electrode extends outward relative to the photosensitive frame along with the movable part; after the processing box is installed in place, the charging roller electrode abuts against the output electrode, so that the charging roller electrode retracts inward relative to the photosensitive frame, and the elastic part stores force, so that the charging roller electrode remains in abutment with the output electrode under the action of the elastic part, and the movable part retracts inward relative to the photosensitive frame along with the charging roller electrode.

3. The process cartridge according to claim 2, wherein: The first axis is parallel to the X direction, and the extension and contraction directions of the movable member and the charging roller electrode relative to the photosensitive frame are parallel to the X direction.

4. The process cartridge according to claim 3, wherein: The linkage member is configured to move from a first position to a second position along the +Z direction relative to the photosensitive frame; The elastic member is also configured to cause the linkage member to have a tendency to move in the -Z direction; after the processing box is disassembled, the linkage member leaves the guide rail and is reset from the second position to the first position along the -Z direction under the action of the elastic member.

5. The process cartridge according to claim 2, wherein The first end of the movable member is fixedly connected to the charging roller electrode; The second end of the movable member is movably connected to the linkage member. The movable member is configured to extend in a direction perpendicular to the X direction. The linkage member is configured to be movable relative to the extending direction of the movable member.

6. The process cartridge according to claim 2, wherein: The protrusion is formed on the inner side of the photosensitive frame, the movable part is arranged inside the photosensitive frame, the charging roller electrode is exposed outward through the side wall of the photosensitive frame, the linkage part is exposed outward through the first hole on the photosensitive frame, and the linkage part can move between a first position and a second position in the first hole.

7. The process cartridge according to claim 2, wherein: Two ends of the elastic member are respectively connected to the movable member and the photosensitive frame.

8. The process cartridge according to any one of claims 2 to 7, wherein: The movable member is made of conductive material. The processing box further comprises a conductive sheet. The charging roller electrode, the movable member and the conductive sheet are electrically connected in sequence. The conductive sheet transmits power to the charging roller.

9. The process cartridge according to claim 8, wherein The protrusion has an abutting side wall on at least one side of the guide slope; The conductive sheet includes a conductive inclined surface and at least one first abutting portion, the conductive inclined surface is arranged on the guide inclined surface, and the first abutting portion is arranged on the abutting side wall; The movable member has an abutting inclined surface and a second abutting portion located on at least one side of the abutting inclined surface; the abutting inclined surface can abut against the conductive inclined surface so that the movable member can move along the guide inclined surface, and the second abutting portion is used to abut against the first abutting portion; After the processing box is installed in place, the charging roller electrode abuts against the output electrode, so that the charging roller electrode retracts inward relative to the photosensitive frame, and the movable part retracts inward relative to the photosensitive frame along with the charging roller electrode, so that the abutting slope leaves the conductive slope, and at the same time, the second abutting portion retracts inward along with the movable part and moves relative to the first abutting portion, and the second abutting portion is in at least partial contact with the first abutting portion, so that the movable part maintains electrical connection with the conductive sheet.

10. The process cartridge according to claim 1, wherein The first end of the charging roller electrode is arranged outside the photosensitive frame, the elastic member abuts between the first end of the charging roller electrode and the photosensitive frame, and the second end of the charging roller electrode passes through the photosensitive frame and is electrically connected to the charging roller.

11. A process cartridge detachably mounted in an image forming apparatus, characterized in that: include: A developing unit comprising a developing frame and a developing roller, wherein the developing roller is mounted in the developing frame; a drum unit comprising a photosensitive frame, a charging roller, and a charging roller electrode, wherein the charging roller is mounted in the photosensitive frame and the charging roller electrode is configured to receive power from the image forming device and transmit it to the charging roller; as well as A mounting portion is detachably provided at an end portion of the photosensitive frame, and the charging roller electrode is provided on the mounting portion.

12. The process cartridge according to claim 11, wherein The developing unit further includes a driving side end cover and a developing roller electrode, wherein the driving side end cover is detachably arranged at the end of the developing frame, and the developing roller electrode is arranged on the driving side end cover; The driving side end cover and the mounting portion are integrally formed, or the driving side end cover and the mounting portion are separately provided.

13. The process cartridge according to claim 11 or 12, wherein: The mounting portion is provided with a second protrusion and a third hole, the first end of the charging roller electrode is arranged on the second protrusion, and the second end of the charging roller electrode extends through the third hole into the photosensitive frame and is conductively connected to the charging roller.

14. The process cartridge according to claim 13, wherein The first end of the charging roller electrode is a claw portion, and the second end is a conductive portion. The claw portion is engaged with the second protrusion to fix the charging roller electrode, and the conductive portion passes through the third hole to be conductively connected to the charging roller. The conductive portion includes a first folded portion and a second folded portion. The first folded portion is attached to the mounting portion, and the second folded portion passes through the third hole and is conductively connected to the charging roller.

15. The process cartridge according to claim 14, wherein The charging roller electrode is conductively connected to the charging roller via a charging roller spring. The second folding portion is provided with a bayonet, and the charging roller spring is engaged with the bayonet.

Images