Developing box

Abstract

The utility model relates to a developing box which comprises a box body, a driving part, a transmission assembly, a cover plate and a detected piece, and the box body is provided with a first end, a second end and a fifth end; the driving part is arranged at the first end, at least part of the transmission assembly is arranged at the fifth end, the transmission assembly receives the driving force transmitted by the driving part and transmits the driving force to the second end from the first end, the transmission assembly comprises a plurality of gears, the rotation axes of the gears extend in the third direction, and the gears comprise bevel gears; the cover plate is arranged at the fifth end and covers at least part of the gears; the detected piece is arranged at the second end and receives the driving force transmitted by the transmission assembly to move relative to the box body. The driving force is transmitted from the first end to the second end through the plurality of gears, and the plurality of gears are protected through the cover plate, so that the power transmission structure is not easy to damage, and the detection accuracy of the image forming device on the developing box is high.

Description

Technical Field

[0001] This application relates to the field of imaging equipment technology, and more particularly to a developing cartridge. Background Technology

[0002] The developing cartridge is a detachable component widely used in image forming apparatuses. It is mounted to the drum assembly and, together with the drum assembly, is installed within the image forming apparatus. The developing cartridge includes a drive assembly and a detection element. The drive assembly, located at the first end of the cartridge, receives external power for movement, while the detection element, located at the second end of the cartridge, receives power from the drive assembly and moves accordingly. The movement of the detection element triggers a detection element within the image forming apparatus, causing the apparatus to detect the developing cartridge.

[0003] In existing technology, a transmission rod is installed inside the casing to transmit power from one end to the other. Because this transmission rod is easily damaged, the accuracy of the image forming apparatus's detection of the developing cartridge is easily affected.

[0004] This application provides a developing cartridge with a novel power transmission structure, which includes multiple gears. Utility Model Content

[0005] This application provides a developing cartridge to solve the technical problem of poor detection accuracy of the developing cartridge by the image forming apparatus due to easy damage to the power transmission structure.

[0006] An embodiment of this application provides a developing cartridge, comprising:

[0007] The box body has a first end and a second end arranged opposite to each other in a first direction, a third end and a fourth end arranged opposite to each other in a second direction, and a fifth end and a sixth end arranged opposite to each other in a third direction.

[0008] The developing roller rotates about a developing axis extending in the first direction;

[0009] The drive unit, which rotates about a drive axis extending in the first direction, is located at the first end;

[0010] A transmission component, at least partially disposed at the fifth end, receives the driving force transmitted by the driving unit and transmits the driving force from the first end to the second end. The transmission component includes a plurality of gears, the rotation axes of the plurality of gears extending upward in a third direction. The plurality of gears transmit the driving force from the first end to the second end. The plurality of gears include bevel gears.

[0011] A cover plate, disposed at the fifth end, covers at least a portion of the plurality of gears;

[0012] The tested component, located at the second end, moves relative to the housing by receiving the driving force transmitted by the transmission component.

[0013] In one possible design, the plurality of gears is ten.

[0014] In one possible design, the plurality of gears includes a control gear that contacts the object being tested. The control gear has a limiting portion, and the cover plate has a limiting portion that can cooperate with the limiting portion to restrict the rotation of the control gear.

[0015] In one possible design, the limiting portion is a first protrusion extending toward the cover plate in the third direction, the limiting portion being cantilevered, and the end of the cantilever having a second protrusion extending toward the transmission assembly in the third direction, the second protrusion blocking the first protrusion.

[0016] In one possible design, the control gear has an abutment portion extending away from the cover plate in the third direction, and the detected object is abutted by the abutment portion and swings relative to the housing, the axis of its swing extending in the second direction.

[0017] In one possible design, the transmission assembly further includes: a first gear whose axis of rotation extends in the first direction, the plurality of gears including a second gear whose axis of rotation extends in the third direction, the first gear and the second gear being bevel gears, the first gear meshing with the second gear to transmit driving force.

[0018] In one possible design, the plurality of gears further includes a third gear, of which eight are arranged and mesh sequentially in the first direction, the third gear being located between the second gear and the control gear in the first direction, the third gear transmitting driving force from the second gear to the control gear.

[0019] In one possible design, the control gear has a missing tooth portion, and the control gear is capable of disengaging from the third gear.

[0020] In one possible design, the developing cartridge further includes an electrode that receives an external voltage, the developing roller includes a first roller body and a first roller shaft, the first roller shaft drives the first roller body to rotate according to the rotation of the drive unit, the electrode is electrically connected to the first roller body, and the first roller shaft is not electrically connected to the first roller body.

[0021] In one possible design, the developing cartridge further includes a conductive element, one end of which contacts the electrode and the other end of which contacts the first roller body; the conductive element is a conductive spring.

[0022] In this application, the driving force is transmitted from the first end to the second end through multiple gears, and the gears are protected by a cover plate, making the power transmission structure less prone to damage, thereby ensuring high accuracy of the image forming apparatus in detecting the developing cartridge.

[0023] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0024] Figure 1 A schematic diagram of the developing cartridge provided in this application in a specific embodiment;

[0025] Figure 2 for Figure 1 A structural schematic diagram of the developing chamber from another perspective;

[0026] Figure 3 for Figure 1 Exploded view of part of the developing chamber structure;

[0027] Figure 4 for Figure 1 A partial structural diagram of the first end of the developing cartridge;

[0028] Figure 5 This is a structural schematic diagram of some of the transmission components, transfer components, the object being tested, and the detection components of the image forming apparatus in the developing cartridge;

[0029] Figure 6 for Figure 5 A schematic diagram of the control gear, the part being tested, and the testing part in the diagram;

[0030] Figure 7 for Figure 5 A schematic diagram of the structure of some transmission components and some transmission components in the process;

[0031] Figure 8 for Figure 3 A partial structural diagram of the cover plate in the middle;

[0032] Figure 9 for Figure 1 Exploded view of the second end of the developing cartridge in the image;

[0033] Figure 10 for Figure 9 A schematic diagram of the structure of the second protective cover;

[0034] Figure 11 for Figure 9 A schematic diagram of the electrode structure in the diagram;

[0035] Figure 12 for Figure 9 A schematic diagram of the structure of the second bearing in the diagram.

[0036] Figure label:

[0037] 1-Developer cartridge; 11-First end; 111-First cover; 1111-First pusher; 12-Second end; 121-Second cover; 1211-Second pusher; 122-Second bearing; 1221-Through hole; 123-Electrode; 1231-First electrical contact; 1232-Second electrical contact; 124-Conductive component; 125-Powder filling port; 13-Third end; 131-Developer roller; 1311-First roller body; 1312-First roller shaft; 132-Powder feeding roller; 133-Powder discharge knife; 14-Fourth end; 15-Fifth end; 151-Cover plate; 1511-Limiting part; 152-Security plate Slot; 153-First support column; 16-Sixth end; 161-Reinforcing member; 2-Storage medium; 31-First gear; 311-First tooth; 312-Second tooth; 32-Second gear; 321-Third tooth; 322-Fourth tooth; 34-Control gear; 341-Fifth tooth; 342-Abutting part; 343-Limited part; 35-Detected part; 351-Abutting part; 352-Pivoting part; 353-Triggering part; 40-Drive part; 401-Power receiving part; 402-Drive gear; 41-Developing gear; 42-Powder feeding gear; 43-Stirring gear; 44-Idler wheel.

[0038] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Detailed Implementation

[0039] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0040] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0041] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0042] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0043] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0044] This application provides a developing cartridge 1 that can be detachably mounted on a drum assembly and can be installed together with the drum assembly into an image forming apparatus. The image forming apparatus includes a detection element 91 for detecting the developing cartridge 1. When triggered by the developing cartridge 1, the detection element 91 moves, enabling the image forming apparatus to recognize the developing cartridge 1.

[0045] For ease of description, the left-right direction of the developing cartridge 1 is defined as the first direction X, the front-back direction as the second direction Y, and the up-down direction as the third direction Z. Wherein, Figure 1 The left side of the developer cartridge 1 shown is left, the right side is right, the top side is top, and the bottom side is bottom.

[0046] like Figures 1-3 As shown, the developing cartridge 1 has a cartridge body with a cavity for storing developer. The cartridge body has a first end 11 and a second end 12 disposed opposite each other in a first direction X, a third end 13 and a fourth end 14 disposed opposite each other in a second direction Y, and a fifth end 15 and a sixth end 16 disposed opposite each other in a third direction Z.

[0047] The developing cartridge 1 includes a developing assembly, a transmission assembly, a transfer assembly, and a test piece 35. The transmission assembly is located at the first end 11, and the test piece 35 is located at the second end 12. The transfer assembly can transmit the power of the transmission assembly to the test piece 35, so that the test piece 35 moves and triggers the detection element 91.

[0048] The transmission component includes multiple gears, whose rotation axes extend in the third direction Z. These gears transmit driving force from the first end 11 to the second end 12. Because the transmission of driving force from the first end 11 to the second end 12 is achieved through multiple gears, it has the advantage of being less prone to damage, thereby enabling the image forming apparatus to detect the developing cartridge 1 with high accuracy.

[0049] Specifically, the developing cartridge 1 has a first cover 111 at its first end 11. The first cover 111 is detachably connected to the cartridge body and covers at least part of the transmission components to protect them. The developing cartridge 1 has a second cover 121 at its second end 12. The second cover 121 is detachably connected to the cartridge body and covers at least part of the tested item 35 to protect it.

[0050] The developing cartridge 1 is provided with a storage medium 2, which stores relevant information of the developing cartridge 1 and can transmit the relevant information of the developing cartridge 1 to the image forming apparatus. The storage medium 2 includes an electrical contact surface electrically connected thereto. In this embodiment, the storage medium 2 is preferably fixedly supported by the first cover 111; in other embodiments, the storage medium 2 may also be supported by the cartridge body or by both the cartridge body and the first cover 111.

[0051] like Figure 1 As shown, the developing assembly includes a developing roller 131, a powder feeding roller 132, and a stirring frame (not shown). The developing roller 131, powder feeding roller 132, and stirring frame are all rotatably mounted within a receiving cavity between a first end 11 and a second end 12 about an axis extending along a first direction X. The powder feeding roller 132 is disposed adjacent to the developing roller 131 and delivers developer to the developing roller 131. The stirring frame stirs the developer within the receiving cavity, preventing developer agglomeration and providing sufficient developer to the powder feeding roller 132, enabling the powder feeding roller 132 to properly supply powder to the developing roller 131. The developing roller 131 contacts the photosensitive drum on the drum assembly, transferring developer to the photosensitive drum.

[0052] The developing roller 131 includes a first roller body 1311 and a first roller shaft 1312. The first roller body 1311 at least partially covers the first roller shaft 1312 and rotates together with the first roller shaft 1312. The first roller body 1311 is insulated from the first roller shaft 1312. In this embodiment, it is preferable that an insulating layer is provided on the outer surface of the first roller shaft 1312.

[0053] The powder feeding roller 132 includes a second roller body and a second roller shaft. The second roller body at least partially covers the second roller shaft and rotates together with it. The first roller body 1311 and the second roller body contact each other to transfer developer. Both the first roller body 1311 and the second roller body are made of conductive material. In this embodiment, the conductive material is preferably conductive resin or conductive sponge.

[0054] The developing assembly also includes a powder discharge blade 133, which contacts the developing roller 131 to control the thickness of the developer on the developing roller 131, so that the thickness of the developer transferred from the developing roller 131 to the photosensitive drum is uniform, and to prevent the developer on the developing roller 131 from being too thick, which would affect the developing quality.

[0055] like Figure 2As shown, the developing cartridge 1 is provided with a pushing assembly, which receives the pushing force applied by the drum assembly to ensure close contact between the developing roller 131 and the photosensitive drum. The pushing assembly includes a first pushing member 1111 and a second pushing member 1211. The first pushing member 1111 is disposed at the rear end of the first cover 111 and protrudes rearward, and the second pushing member 1211 is disposed at the rear end of the second cover 121 and protrudes rearward. In other embodiments, the first pushing member 1111 and the second pushing member 1211 may also be integrally formed with the cartridge body.

[0056] like Figure 9 As shown, the second end 12 is also provided with a powder filling port 125, which penetrates the side wall of the second end 12 in the first direction X, so that developer can be poured into the cartridge body through the powder filling port 125. In order to prevent developer leakage, a matching sealing cap is provided at the powder filling port 125.

[0057] like Figure 2 As shown, the sixth end 16 has a reinforcing member 161, which consists of multiple staggered ribs to enhance the strength of the box body. Furthermore, a shielding member can be provided at the sixth end 16 to cover the reinforcing member 161.

[0058] like Figure 4 As shown, the transmission assembly includes a drive unit 40 rotatably mounted on the first end 11, with the rotation axis of the drive unit 40 extending in a first direction X. The drive unit 40 includes a power receiving unit 401 and a drive gear 402 coaxially arranged. In the first direction X, the power receiving unit 401 is further away from the first end 11 than the drive gear 402. The power receiving unit 401 is capable of receiving driving force from the image forming apparatus and transmitting the driving force through the drive gear 402 to drive the developing cartridge 1. Furthermore, a through hole is provided on the first cover 111, through which the power receiving unit 401 is exposed to receive driving force from the image forming apparatus.

[0059] The transmission assembly also includes: a developing gear 41, a powder feeding gear 42, a stirring gear 43, and an idler gear 44. The developing gear 41 is coaxially fixedly mounted on the end of the developing roller 131 near the first end 11, and can receive the driving force from the drive gear 402 to rotate the developing roller 131. The powder feeding gear 42 is coaxially fixedly mounted on the end of the powder feeding roller 132 near the first end 11 of the cartridge, and can receive the driving force from the drive gear 402 to rotate the powder feeding roller 132. The stirring gear 43 is coaxially fixedly mounted on the end of the stirring frame near the first end 11 of the cartridge, and can receive the driving force from the drive gear 402 to rotate the stirring frame. The idler gear 44 is rotatably mounted on the first end 11, connecting the drive gear 402 and the stirring gear 43, to transmit the driving force received by the drive unit 40 to the stirring gear 43. In other embodiments, the stirring gear 43 can directly mesh with the drive gear 402. It is understood that this embodiment does not limit the number of gears in the transmission assembly or the meshing relationship of the gears. The number of gears in the transmission assembly and the meshing relationship of the gears can be set according to actual needs.

[0060] like Figure 5 and Figure 6 As shown, the tested item 35 is capable of movement relative to the housing. In this embodiment, the tested item 35 preferably moves relative to the housing in a swinging manner, with the swing axis of the tested item 35 intersecting the first direction X and preferably extending in the second direction Y. In other embodiments, the tested item 35 may move relative to the housing in a linear motion.

[0061] Specifically, the detected component 35 includes a contact portion 351, a pivot portion 352, and a trigger portion 353. In the first direction X, the pivot portion 352 is located between the contact portion 351 and the trigger portion 353, and the trigger portion 353 is further away from the first end 11 than the contact portion 351. When the contact portion 351 is subjected to a driving force, the detected component 35 can pivot relative to the housing about the pivot portion 352 as the pivot point, and the pivot axis extends in the second direction Y. When the contact portion 351 swings downward, the trigger portion 353 swings upward to trigger the detected component 91.

[0062] Preferably, the trigger portion 353 extends in the second direction Y and has an inclined surface whose extension direction intersects the second direction Y and the third direction Z, and the inclined surface can directly contact the detection element 91.

[0063] like Figure 5 and Figure 7 As shown, the transmission components include: a first gear 31, a second gear 32, a third gear 33, and a control gear 34.

[0064] The first gear 31 is located at the first end 11 and can receive the driving force transmitted by the transmission assembly to rotate around a first axis, which extends in the first direction X. The second gear 32 is located at the fifth end 15 of the housing and adjacent to the first end 11. It can rotate around a second axis as the first gear 31 rotates. The second axis intersects the first direction X, and preferably, the rotation axis of the second gear 32 extends in the third direction Z. The third gear 33 is located at the fifth end 15 and can rotate around a third axis as the second gear 32 rotates. The third axis extends in the third direction Z. The control gear 34 is located at the fifth end 15 and adjacent to the second end 12. It can rotate around a fourth axis as the third gear 33 rotates. The fourth axis extends in the third direction Z. Through the transmission of the first gear 31, the second gear 32, the third gear 33, and the control gear 34, the driving force is transmitted from the first end 11 to the second end 12.

[0065] Specifically, the first gear 31 includes a first tooth portion 311 and a second tooth portion 312. The first tooth portion 311 meshes with the stirring gear 43 to receive driving force. In other embodiments, the first tooth portion 311 may also mesh with the idler gear 44 or the drive gear 402. The second tooth portion 312 is a bevel tooth. In the first direction X, the first tooth portion 311 is further away from the sidewall of the first end 11 than the second gear 312.

[0066] The second gear 32 includes a third tooth 321 and a fourth tooth 322. The fourth tooth 322 is a bevel tooth that can mesh with the second tooth 312, allowing driving force to be transmitted from the first gear 31 to the second gear 32. The second gear 32 rotates with the first gear 31. In the third direction Z, the third tooth 321 is located above the fourth tooth 322.

[0067] Multiple third gears 33 are provided, and the multiple third gears 33 are sequentially meshed in the first direction X. In this embodiment, the number of third gears 33 is preferably 8. Under the premise that the size of the third gears 33 meets the size of the developing cartridge 1, the number of third gears 33 is minimized, which ensures stable transmission of driving force and controls the assembly difficulty and cost of the developing cartridge 1. In other embodiments, the number of third gears 33 can be set according to actual needs. That is, in this embodiment, the gears extending in the third direction Z of the rotation axis are preferably 10.

[0068] In the first direction X, the third gear 33 closest to the first end 11 among the plurality of third gears 33 meshes with the third tooth 321 of the second gear 32, and can rotate with the second gear 32, thereby transmitting the driving force from the second gear 32 to the remaining third gears 33, driving the remaining third gears 33 to rotate.

[0069] like Figure 5 and Figure 6As shown, the control gear 34 includes a fifth tooth 341 and an abutment portion 342. In the first direction X, the third gear 33 closest to the second end 12 among a plurality of third gears 33 meshes with the fifth tooth 341 of the control gear 34, allowing driving force to be transmitted from the third gear 33 to the control gear 34, causing the control gear 34 to rotate following the third gear 33. In the third direction Z, the fifth tooth 341 is located above the abutment portion 342. The abutment portion 342 protrudes downward in the third direction Z, and when the control gear 34 rotates, the abutment portion 342 contacts the abutted portion 351, causing the detected element 35 to move.

[0070] The abutment portion 342 includes a plurality of spaced protrusions arranged sequentially in the rotation direction of the control gear 34. The protrusion height of the plurality of protrusions and the arc length corresponding to the rotation direction of the control gear 34 may be the same or different. The included angle between the plurality of protrusions and the third direction Z may be the same or different, and can be set according to actual needs.

[0071] Furthermore, the fifth tooth 341 is missing a tooth, meaning it can either rotate with the transmission gear 33 or disengage from the transmission gear 33 and stop rotating. When the fifth tooth 341 rotates while meshing with the transmission gear 33, multiple protrusions on the abutting part 342 sequentially abut against the abutted part 351, causing the detected element 35 to swing multiple times, thereby triggering the triggering part 353 to trigger the detection element 91. When the abutted part 351 is located at the interval between the multiple protrusions, the detected element 35 swings in the opposite direction under the action of the detection element 91, gravity, or the elastic element, causing the detected element 35 to stop triggering the detection element 91. It is understood that the number of protrusions and the angle between the inclined surface on the protrusion and the third direction Z determine the number of swings and the swing speed of the detected element 35, respectively. This embodiment does not specifically limit these, and they can be set according to actual needs.

[0072] When the fifth tooth 341 disengages from the transmission gear 33 and stops rotating, the detected element 35 stops oscillating and no longer triggers the detection element 91. In some embodiments, missing teeth may be provided on the first gear 31, the second gear 32, or the third gear 33 to achieve the purpose of preventing the detected element 35 from continuously triggering the detection element 91.

[0073] like Figure 2 As shown, the developing cartridge 1 also includes a cover plate 151, which is disposed at the fifth end 15 and covers at least part of the second gear 32, the third gear 33 and the control gear 34 to provide protection and prevent them from detaching from the cartridge body.

[0074] like Figure 6 As shown, a limiting part 343 is provided at the upper end of the control gear 34, and the limiting part 343 is a first protrusion protruding in the third direction Z. Figure 8As shown, a limiting part 1511 is provided on the cover plate 151 corresponding to the control gear 34. The limiting part 1511 is in the shape of an elastic cantilever. A second protrusion (not shown in the figure) protruding downward in the third direction Z is provided at the end of the cantilever. An inclined surface is provided on the second protrusion, which can block the first protrusion.

[0075] When the control gear 34 rotates to the point where it disengages from the transmission gear 33, the restricted part 343 interacts with the limiting part 1511. The limiting part 1511 prevents the control gear 34 from rotating unpredictably after disengagement, thus preventing the tested item 35 from moving and preventing the tested item 35 from accidentally contacting the detection item 91. In other words, the cooperation between the restricted part 343 and the limiting part 1511 restricts the rotation of the control gear 34 during non-detection processes, thereby limiting the movement of the tested item 35 during non-detection processes, improving the stability of the tested item 35 during non-detection processes, and making the tested item 35 less prone to damage.

[0076] When the fifth tooth 341 of the control gear 34 needs to mesh with the transmission gear 33 again, the operator only needs to rotate the control gear 34 so that the limited part 343 abuts against the inclined surface of the limiting part 1511, the limiting part 1511 elastically avoids, and then the limited part 343 passes over the limiting part 1511, and the fifth tooth 341 meshes with the transmission gear 33 again.

[0077] Furthermore, such as Figure 9 As shown, the box body is provided with a mounting groove 152 recessed in the third direction Z. A first support column 153 extending in the third direction Z is provided in the mounting groove 152. The control gear 34 is installed in the mounting groove 152. The first support column 153 rotatably supports the control gear 34.

[0078] Optionally, the mounting groove 152 is provided with a clearance groove on the side or bottom, so that the abutting part 351 can contact the abutting part 342 through the clearance groove.

[0079] like Figure 10 As shown, the second cover 121 is provided with a second support post 1212 extending in the second direction Y. Preferably, the second support post 1212 is cylindrical, and the pivot portion 352 is a hole. The second support post 1211 is inserted into the pivot portion 352 so that the second cover 121 rotatably supports the tested item 35. In other embodiments, the tested item 35 may be rotatably supported by other components.

[0080] like Figure 9As shown, the second end 12 is also provided with a second bearing 122 and an electrode 123. The second bearing 122 is used to support the ends of the developing roller 131 and the powder feeding roller 132 near the second end 12 in the first direction X. The electrode 123 is supported by the second bearing 122 and is used to contact the power supply terminal in the image forming apparatus to receive the voltage output by the image forming apparatus.

[0081] like Figure 11 As shown, electrode 123 includes a first electrical contact portion 1231 and a second electrical contact portion 1232. In the second direction Y, the distance between the first electrical contact portion 1231 and the tested object 35 is less than the distance between the second electrical contact portion 1232 and the tested object 35, that is, the first electrical contact portion 1231 is closer to the tested object 35.

[0082] like Figure 12 As shown, the bearing 122 is provided with a through hole 1221, and the first electrical contact portion 1231 is exposed to the outside through the through hole 1221, so that it can contact the power supply terminal to receive voltage.

[0083] In one embodiment, the second electrical contact 1232 contacts the powder feeding roller 132 to transmit voltage to the powder feeding roller 132. Since the second roller body of the powder feeding roller 132 contacts the first roller body 1311 of the developing roller 131, the powder feeding roller 132 can transmit voltage to the first roller body 1311 while transmitting developer.

[0084] like Figure 9 As shown, in another embodiment, the second end 12 is further provided with a conductive element 124. One end of the conductive element 124 contacts the electrode 123, and the other end contacts the end of the first roller body 1311, so that the electrode 123 and the first roller body 1311 are electrically connected. Preferably, the conductive element 124 is a conductive spring to ensure the stability of voltage transmission. An auxiliary component such as a conductive sponge or a pad can also be added between the conductive element 124 and the first roller body 1311 to further stabilize the voltage transmission between them.

[0085] In this embodiment, both electrode 123 and conductive element 124 are made of conductive steel. In other embodiments, they may be made of conductive resin or other conductive materials.

[0086] In other embodiments, the conductive element 124 may not be provided separately; the powder discharge knife 133 may be used as a conductive element to transmit voltage to the first roller 1311, or other components may be used as conductive elements.

[0087] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A developing cartridge, characterized by, The application relates to a cartridge body, a developing roller, a driving part, a transmission assembly, a cover plate and a detected piece. The cartridge body is provided with a first end and a second end in a first direction, a third end and a fourth end in a second direction, and a fifth end and a sixth end in a third direction. The developing roller rotates around a developing axis extending in the first direction. The driving part rotates around a driving axis extending in the first direction and is located at the first end. The transmission assembly is located at least partially at the fifth end, receives driving force transmitted by the driving part and transmits the driving force from the first end to the second end. The transmission assembly comprises a plurality of gears, the rotation axes of the plurality of gears extend in the third direction, the plurality of gears transmit the driving force from the first end to the second end, and the plurality of gears comprise bevel gears. The cover plate is located at the fifth end and covers at least part of the plurality of gears.

2. The process cartridge according to claim 1, wherein, The detected piece is located at the second end and moves relative to the cartridge body by receiving the driving force transmitted by the transmission assembly.

3. The process cartridge of claim 1, wherein, The plurality of gears are ten gears.

4. The process cartridge of claim 3 wherein, The plurality of gears comprise a control gear, the control gear is in contact with the detected piece, the control gear has a limiting part, the cover plate has a limiting part, the limiting part can cooperate with the limiting part to limit the rotation of the control gear.

5. The process cartridge of claim 3 wherein, The limiting part is a first protrusion extending towards the cover plate in the third direction, the limiting part is in a cantilever shape, the end of the cantilever has a second protrusion extending towards the transmission assembly in the third direction, and the second protrusion blocks the first protrusion.

6. The process cartridge of claim 3 wherein, The control gear has an abutting part away from the cover plate in the third direction, the detected piece swings relative to the cartridge body by abutting against the abutting part, and the swinging axis of the detected piece extends in the second direction.

7. The process cartridge of claim 6 wherein, The transmission assembly further comprises a first gear, the rotation axis of the first gear extends in the first direction, the plurality of gears comprise a second gear, the rotation axis of the second gear extends in the third direction, the first gear and the second gear are bevel gears, the first gear is engaged with the second gear to transmit the driving force.

8. The process cartridge of claim 7 wherein, The plurality of gears further comprise a third gear, the third gear is provided with eight gears and is engaged in sequence in the first direction, the third gear is located between the second gear and the control gear in the first direction, and the third gear transmits the driving force from the second gear to the control gear.

9. The developer cartridge of any one of claims 1-8, wherein, The control gear has a toothless part, and the control gear can be disengaged from the third gear.

10. The process cartridge of claim 9 wherein, The application further comprises an electrode, the electrode receives an external voltage, the developing roller comprises a first roller body and a first roller shaft, the first roller shaft drives the first roller body to rotate according to the rotation of the driving part, the electrode is electrically connected with the first roller body, and the first roller shaft is not electrically connected with the first roller body. The application further comprises a conductive piece, one end of the conductive piece is in contact with the electrode, the other end of the conductive piece is in contact with the first roller body, and the conductive piece is a conductive spring.

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