Developing box

Abstract

The utility model relates to a developing box, and relates to the technical field of electronic imaging. The developing box is used for being detachably installed on the image forming device and comprises a box body, a driving part, a developing roller, a powder feeding roller and a powder discharging knife. The box body is provided with a first end and a second end which are oppositely arranged in a first direction, the box body is also provided with a third end and a fourth end which are oppositely arranged in a second direction, the driving part rotates around a driving axis extending in the first direction, the driving part is positioned at the first end, the developing roller rotates around a developing axis extending in the first direction, and the developing roller is positioned at the third end; the developing roller comprises a developing roller shaft and a developing roller main body, the developing roller shaft drives the developing roller main body to rotate, the powder feeding roller rotates around a powder feeding axis extending in a first direction, the powder outlet knife extends in the first direction and is in contact with the developing roller, the developing box further comprises an electrode, and the electrode is electrically connected with the developing roller main body. The developing roller of the developing box can be reliably electrified, so that the developing roller can reliably adsorb the developing agent.

Description

Technical Field

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

[0002] A developing cartridge is a detachable structure widely used in image forming apparatuses. It can be mounted together with the drum assembly. The developing cartridge includes a developing roller and a toner delivery roller. The toner delivery roller delivers developer (also known as developer powder or toner) to the developing roller, which in turn delivers developer to the photosensitive drum of the drum assembly, enabling the drum to form an electrostatic latent image. The developing cartridge also includes electrodes that receive current output from the image forming apparatus. These electrodes can transfer current to the developing roller, allowing the charged roller to attract developer. However, in related technologies, the developing roller cannot reliably attract developer. Utility Model Content

[0003] In view of this, this application provides a developing cartridge that can improve the problem that the developing roller cannot effectively adsorb the developer.

[0004] This application provides a developing cartridge for detachable installation in an image forming apparatus. The developing cartridge includes a cartridge body, a drive unit, a developing roller, a toner feeding roller, and a toner dispensing blade. The cartridge body has a first end and a second end disposed opposite to each other in a first direction, and a third end and a fourth end disposed opposite to each other in a second direction. The drive unit rotates about a drive axis extending in the first direction and is located at the first end. The developing roller rotates about a developing axis extending in the first direction and is located at the third end. The developing roller includes a developing roller shaft and a developing roller body. The developing roller shaft drives the developing roller body to rotate. The toner feeding roller rotates about a toner feeding axis extending in the first direction. The toner dispensing blade extends in the first direction and contacts the developing roller. The developing cartridge also includes electrodes electrically connected to the developing roller body.

[0005] Optionally, the electrode is not electrically connected to the powder feeding roller, but is electrically connected to the powder discharging knife.

[0006] Optionally, the powder discharge blade contacts the developing roller body, and the electrode receives external voltage and transmits it to the developing roller body through the powder discharge blade.

[0007] Optionally, the powder feeding roller includes a powder feeding roller shaft and a powder feeding roller body. The powder feeding roller shaft drives the powder feeding roller body to rotate. The powder feeding roller is electrically connected to the electrode, and the powder feeding roller body contacts the developing roller body to transmit voltage.

[0008] Optionally, the developing roller body is not electrically connected to the developing roller shaft.

[0009] Optionally, an insulating layer is provided between the developing roller shaft and the developing roller body.

[0010] Optionally, the image forming apparatus includes a power supply terminal, which includes a first power supply terminal and a second power supply terminal. The electrode includes a first sub-electrode, a second sub-electrode, and a third sub-electrode. A portion of the first sub-electrode, the second sub-electrode, and the third sub-electrode are in contact with the first power supply terminal, and another portion of the sub-electrode are in contact with the second power supply terminal. The first sub-electrode is electrically connected to the developing roller, the second sub-electrode is electrically connected to the powder feeding roller, and the third sub-electrode is electrically connected to the powder exiting blade.

[0011] Optionally, the first sub-electrode and the second sub-electrode are both in contact with the first power supply terminal, and the third sub-electrode is in contact with the second power supply terminal.

[0012] Optionally, the first sub-electrode is in contact with the first power supply terminal, and the second and third sub-electrodes are both in contact with the second power supply terminal.

[0013] Optionally, an insulating element is provided between the first sub-electrode, the second sub-electrode, and the third sub-electrode.

[0014] Optionally, the first sub-electrode includes a first electrical receiving portion, the second sub-electrode includes a second electrical receiving portion, and the third sub-electrode includes a third electrical receiving portion. The first electrical receiving portion, the third electrical receiving portion, and the second electrical receiving portion are all in contact with the power supply terminal and are arranged sequentially in the second direction.

[0015] Optionally, in the second direction, the distance between the first electrical receiver and the second electrical receiver is greater than the distance between the second electrical receiver and the third electrical receiver.

[0016] With the above settings, the developing roller can be reliably energized, thereby allowing the developing roller to reliably adsorb the developer.

[0017] 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

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the developing cartridge in one embodiment;

[0020] Figure 2 for Figure 1 A schematic diagram of the developing chamber from another perspective;

[0021] Figure 3This is a schematic diagram showing the distribution of the photosensitive drum, developing roller, powder feeding roller, and powder discharging blade in one embodiment;

[0022] Figure 4 for Figure 1 A schematic diagram of the transmission assembly of the developing cartridge;

[0023] Figure 5 for Figure 2 A schematic diagram of the central support component from a three-dimensional perspective;

[0024] Figure 6 This is a schematic diagram of a partial assembly structure of an electrode, a developing roller, a powder feeding roller, and a powder discharging blade in one embodiment;

[0025] Figure 7 for Figure 6 A schematic diagram of the local structure of the medium structure from another perspective;

[0026] Figure 8 This is a schematic diagram of a partial assembly structure of the electrode, developing roller, powder feeding roller, and powder discharging blade in another embodiment;

[0027] Figure 9 This is a schematic diagram of a partial assembly structure of the electrode, developing roller, powder feeding roller, and powder discharging blade in another embodiment;

[0028] Figure 10 This is a schematic diagram of the developing cartridge in another embodiment;

[0029] Figure 11 for Figure 10 A schematic diagram of the transmission assembly of the developing cartridge;

[0030] Figure 12 This is a partial structural diagram of the developing cartridge from the second end view.

[0031] Figure 13 for Figure 12 Schematic diagram of the exploded structure of the medium-sized structure;

[0032] Figure 14 for Figure 10 A partial assembly diagram of the support components, electrode assembly, developing roller, powder feeding roller, and powder exiting blade in the developing cassette;

[0033] Figure 15 for Figure 10 A partial assembly structure diagram of the first electrical receiver, the second electrical receiver, the third electrical receiver, and the insulating component in the developing cartridge;

[0034] Figure 16 for Figure 15 A schematic diagram of the circuit connections of the first power supply terminal, the second power supply terminal, the first sub-electrode, the second sub-electrode, the third sub-electrode, the developing roller, the powder feeding roller, and the powder discharging blade in the developing cartridge;

[0035] Figure 17 This is a partial structural diagram of the developing cartridge in yet another embodiment;

[0036] Figure 18 for Figure 17 Schematic diagram of the exploded structure of the medium-sized structure;

[0037] Figure 19 for Figure 17 A partial assembly diagram of the first electrical receiver, second electrical receiver, third electrical receiver, and insulating components in the developing cartridge;

[0038] Figure 20 for Figure 17 A schematic diagram of the circuit connections of the first power supply terminal, the second power supply terminal, the first sub-electrode, the second sub-electrode, the third sub-electrode, the developing roller, the powder feeding roller, and the powder discharging blade in the developing cartridge;

[0039] Figure 21 This is a partial structural diagram of the developing cartridge in another embodiment;

[0040] Figure 22 for Figure 21 A schematic diagram of a partial assembly structure of the first sub-electrode, developing roller, and powder feeding roller of the developing cartridge in one embodiment;

[0041] Figure 23 for Figure 21 A schematic diagram of the circuit connections for the first power supply terminal, the second power supply terminal, the first sub-electrode, the second sub-electrode, the developing roller, the powder feeding roller, and the powder exiting blade in the developing cartridge.

[0042] Figure label:

[0043] 1-Box body, 11-First end, 111-First cover, 1111-Locked part, 1112-First guide, 1113-First pushing part, 12-Second end, 121-Second cover, 1211-Second pushing part, 122-Support, 1221-Second guide, 1222-Support hole, 1223-Insulating part, 13-Third end, 14-Fourth end, 141-Handle, 15-Fifth end, 151-Cover plate, 16-Sixth end, 161-Guide plate, 21-Bracket, 22-Storage medium, 3-Developing roller, 31-Developing roller body, 32-Developing roller shaft, 4-Powder feeding roller, 41-Powder feeding roller body, 42-Powder feeding roller shaft, 5-Powder discharge knife, 51-Knife holder, 52-Blade, 61-Stirring rack, 62-Detection rotating part, 621-Detection Gear, 71-Drive unit, 711-Power receiving unit, 712-Drive gear, 72-Developing gear, 73-Powder feeding gear, 74-First idler wheel, 75-Second idler wheel, 76-Third idler wheel, 77-Stirring gear, 78-Idle wheel, 8-Electrode, 81-Electrical receiving unit, 82-Electrical transmission unit, 821-First electrical transmission unit, 822-Second electrical transmission unit, 91-First sub-electrode, 911-First electrical receiving unit, 912-First electrical transmission unit, 913-Second electrical transmission unit, 92-Second sub-electrode, 921-Second electrical receiving unit, 922-Second electrical transmission unit, 923-Third electrical transmission unit, 93-Third sub-electrode, 931-Third electrical receiving unit, 932-Third electrical transmission unit, 20-Photosensitive drum, 30-First power supply terminal, 40-Second power supply terminal. Detailed Implementation

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0048] In the accompanying figures, the left-right direction is the first direction, the front-back direction is the second direction, and the up-down direction is the third direction.

[0049] The electrical connection described in this article refers to a connection between two conductive structural components that can conduct electricity through a connection. The two conductive structural components can be in direct physical contact and conduct electricity, or the two conductive structural components can be indirectly in physical contact and conduct electricity through other conductive structural components.

[0050] This application provides some embodiments regarding a developing cartridge for detachably mounting to a drum assembly of an image forming apparatus. The image forming apparatus includes a detection element for detecting the developing cartridge. When the developing cartridge is mounted to the image forming apparatus, the detection element is triggered by the developing cartridge, causing it to move and allowing the image forming apparatus to identify the developing cartridge. The drum assembly includes a photosensitive drum that can form an electrostatic latent image under laser irradiation. The developing cartridge can contain developer (also known as developer powder or toner), and the developing cartridge can transfer developer to the photosensitive drum. The photosensitive drum absorbs the required developer from the developing cartridge, thereby forming a visible developer image (also known as a developer powder image or toner image). The photosensitive drum then transfers the developer image to a printing medium (e.g., paper, photographic paper, labels, envelopes) to form an image (e.g., text, symbols, drawings, photographs, tables) on the printing medium.

[0051] In some embodiments, please refer to Figure 1 As shown, the box body 1 has a first end 11 and a second end 12 arranged opposite to each other in the first direction, a third end 13 and a fourth end 14 arranged opposite to each other in the second direction, and a fifth end 15 and a sixth end 16 arranged opposite to each other in the third direction.

[0052] In some embodiments, please refer to Figure 1 As shown, the box body 1 may include a handle 141, which may be located at the fourth end 14, allowing the user to pick up the developing box by grasping the handle 141.

[0053] In some embodiments, please refer to Figure 1 As shown, the developing cartridge includes a cover plate 151, which is located on the fifth end 15 and is detachably installed on the cartridge body 1.

[0054] In some embodiments, please refer to Figure 2As shown, the cartridge 1 may include a guide plate 161, which may be disposed at the sixth end 16. The guide plate 161 may extend along a first direction and be located between the first end 11 and the second end 12. When the developing cartridge is mounted on the drum assembly and the developing cartridge and the drum assembly are jointly mounted to the image forming apparatus, the guide plate 161 may be exposed through the placement hole of the drum assembly. When the image forming apparatus is in operation, the guide plate 161 is used to guide the movement of the printing medium (also known as the sheet).

[0055] In some embodiments, please refer to Figures 1-2 As shown, the developing cartridge may further include a first cover 111, a second cover 121, a transmission assembly, and a component to be tested. The first cover 111 is detachably mounted on the first end 11, and the first cover 111 can at least cover a portion of the transmission assembly, thus protecting the transmission assembly. The second cover 121 is detachably mounted on the second end 12, and the second cover 121 can at least cover a portion of the component to be tested, thus protecting the component to be tested.

[0056] In some embodiments, please refer to Figure 2 As shown, the developing cartridge may include a support 21 and a storage medium 22. The storage medium 22 is detachably mounted on the support 21, which is provided with a latch (not shown in the figure). The support 21 is detachably mounted to the first cover 111 or the cartridge body 1 via the latch. The storage medium 22 is used to store relevant information of the developing cartridge, and can transmit the relevant information of the developing cartridge to the image forming apparatus. The storage medium 22 is provided with an electrical contact surface (not shown in the figure). The electrical contact surface may be directly located on the storage medium and directly electrically connected to the storage medium, or it may be indirectly electrically connected to the storage medium through other conductive media. The electrical contact surface is used for direct contact with the image forming apparatus, and the information in the storage medium can be transmitted to the image forming apparatus through the electrical contact surface.

[0057] In some embodiments, please refer to Figure 3 As shown, the developing cartridge may include a developing roller 3, a powder feed roller 4, a powder exit blade 5, and a stirring frame (not shown). The stirring frame is used to stir the developer inside the cartridge to prevent the developer from clumping. The powder feed roller 4 contacts the developing roller 3 and is used to transfer the developer to the developing roller 3. The powder exit blade 5 contacts the developing roller 3 and is used to limit the thickness of the developer adsorbed on the developing roller 3 so that the developing roller 3 can transfer a relatively uniform thickness of developer to the photosensitive drum 20.

[0058] In some embodiments, the developing roller 3, the powder feeding roller 4, and the stirring frame can all be supported by the housing 1. The developing roller 3 rotates about a developing axis extending in a first direction, the powder feeding roller 4 rotates about a powder feeding axis extending in the first direction, and the stirring frame rotates about a stirring axis extending in the first direction.

[0059] In some embodiments, please refer to Figure 3 As shown, the developing roller includes a developing roller body 31 and a developing roller shaft 32 connected to each other. The developing roller body 31 may be made of conductive rubber material and is used to absorb developer and to transfer developer to the photosensitive drum 20. The developing roller shaft 32 is rotatably connected to the cartridge 1, and both the developing roller shaft 32 and the developing roller body 31 can rotate relative to the cartridge about the developing axis. The developing roller shaft 32 may be a steel shaft, which allows for relatively high structural strength.

[0060] In some embodiments, the developing roller may be located at the third end.

[0061] In some embodiments, please refer to Figure 3 As shown, the powder feeding roller 4 includes a powder feeding roller body 41 and a powder feeding roller shaft 42 connected to each other. The powder feeding roller body 41 is in contact with the developing roller body 31. The powder feeding roller body 41 is used to transfer developer to the developing roller body 31. The powder feeding roller shaft 42 is rotatably connected to the cartridge body 1. Both the powder feeding roller shaft 42 and the powder feeding roller body 41 can rotate relative to the cartridge body around the powder feeding axis.

[0062] In some embodiments (not shown in the figures), where it is not necessary to use a powder feeding roller to transmit current to the developing roller, a powder feeding roller may not be required. Instead, other materials such as sponges can be used as powder feeding components to transfer developer to the developing roller. Alternatively, neither a powder feeding roller nor a sponge may be used for powder feeding, and the developing roller can absorb the developer itself.

[0063] In some embodiments, please refer to Figure 3 As shown, the powder ejector 5 may include a blade holder 51 and a blade 52. The blade holder 51 supports the blade 52, and the blade 52 can be mounted on the blade holder 51 by welding or gluing. The blade holder 51 can be mounted on the cartridge. The blade 52 can contact the developing roller body 31 to limit the thickness of the developer adsorbed on the developing roller body 31.

[0064] In some embodiments, at least a portion of the powder dispensing blade may be made of a conductive material. For example, the powder dispensing blade may be a steel blade to ensure good conductivity.

[0065] In some embodiments, the transmission component may be disposed at the first end; please refer to... Figure 4As shown, the transmission assembly may include a drive unit 71 rotatably mounted on the first end 11, the drive unit 71 rotating about a drive axis extending in a first direction. A drive unit mounting post (not shown) extending in the first direction away from the first end 11 may be provided on the sidewall of the first end 11. The drive unit 71 is rotatably connected to the drive unit mounting post, and the drive unit 71 can rotate relative to the drive unit mounting post. The drive unit 71 may include a power receiving unit 711 and a drive gear 712. The power receiving unit 711 is connected to the power output shaft of the image forming apparatus. The power receiving unit 711 can receive power output from the power output shaft and can transmit power to the drive gear 712, the drive gear 712 being closer to the first end 11 in the first direction than the power receiving unit 711.

[0066] In some embodiments, please refer to Figure 4 As shown, the transmission assembly may also include a developing gear 72, a powder feeding gear 73, a first idler wheel 74, a second idler wheel 75, a third idler wheel 76, a stirring gear 77, and a detection rotating component 62.

[0067] In some embodiments, please refer to Figure 4 As shown, the developing gear 72 can be coaxially fixedly installed on one end of the developing roller shaft in the first direction near the first end 11. The developing gear 72 can mesh with the driving gear 712. The developing gear 72 can receive the power transmitted by the driving gear 712 so that the developing gear 72 can drive the developing roller shaft to rotate.

[0068] In some embodiments, please refer to Figure 4 As shown, the powder feeding gear 73 can be coaxially fixedly installed on the end of the powder feeding roller shaft near the first end 11 in the first direction. The powder feeding gear 73 can mesh with the drive gear 712. The powder feeding gear 73 can receive the power transmitted by the drive gear 712 so that the powder feeding gear 73 can drive the powder feeding roller shaft to rotate.

[0069] In some embodiments, please refer to Figure 4 As shown, the first idler wheel 74, the second idler wheel 75, and the third idler wheel 76 are all rotatably connected to the first end 11. The stirring gear 77 can be coaxially fixedly mounted on the end of the stirring frame 61 near the first end 11 in a first direction. The first idler wheel 74 meshes with the drive gear 712, the first idler wheel 74 meshes with the second idler wheel 75, the second idler wheel 75 meshes with the third idler wheel 76, and the third idler wheel 76 meshes with the stirring gear 77. The power transmitted by the drive gear 712 can be transmitted to the stirring gear 77 through the first idler wheel 74, the second idler wheel 75, and the third idler wheel 76, so that the stirring gear 77 can drive the stirring frame 61 to rotate.

[0070] In some embodiments, please refer to Figure 4As shown, the detection rotating member 62 includes a detection gear 621, and a stirring gear 77 can mesh with the detection gear 621. The stirring gear 77 can drive the detection gear 621 to rotate, thereby causing the detection rotating member 62 to rotate. The detection rotating member 62 is provided with a detection protrusion structure (not shown in the figure) protruding along a first direction and located at the second end 12. During the rotation of the detection rotating member, the detection protrusion structure can trigger a detection element within the image forming apparatus, enabling the image forming apparatus to identify the developing cartridge.

[0071] In some embodiments, please refer to Figure 2 As shown, the first cover 111 includes a locking portion 1111, a first guide 1112, and a first pushing portion 1113. The locking portion 1111 is a protruding structure extending away from the developing roller, and is locked by a locking member on the drum assembly to prevent the developing cartridge from detaching from the drum assembly. The first guide 1112 is a cylindrical protruding structure extending outward in a first direction. The first guide 1112 can be located at the front end of the first cover 111, and during the installation of the developing cartridge onto the drum assembly, the first guide 1112 guides the developing cartridge to be smoothly installed onto the drum assembly. The first pushing portion 1113 can be located at the rear end of the first cover 111. The first pushing portion 1113 is a protruding structure extending away from the developing roller, and is used to receive the pushing force applied by the drum assembly to the developing cartridge, ensuring close contact between the developing roller and the photosensitive drum.

[0072] In some embodiments, please refer to Figure 2 As shown, the second cover 121 includes a second pusher 1211, which is a protruding structure that protrudes in the direction away from the developing roller. The second pusher 1211 has the same function as the first pusher 1113. The second pusher 1211 is used to receive the pushing force applied by the drum assembly to the developing cartridge, so that the developing roller and the photosensitive drum are in close contact.

[0073] In some embodiments, please refer to Figure 2 As shown, the first cover 111 at least covers the drive unit portion. The first cover 111 is provided with a through hole (not shown in the figure) extending through the first cover 111 in a first direction. The through hole is used to allow the power receiving unit 711 to be exposed, so that the power receiving unit 711 can receive the power output from the image forming apparatus.

[0074] In some embodiments, please refer to Figure 2As shown, the second end 12 may be provided with a support member 122. The end of the developing roller shaft located at the second end 12 in the first direction may be supported by the support member 122, and the end of the developing roller shaft located at the second end 12 in the first direction may be rotatably connected to the support member 122. The end of the powder feeding roller shaft located at the second end 12 in the first direction may be supported by the support member 122, and the end of the powder feeding roller shaft located at the second end 12 in the first direction may be rotatably connected to the support member 122.

[0075] In some embodiments, please refer to Figure 5 As shown, the support member 122 may be provided with a second guide member 1221 and a support hole 1222. The second guide member 1221 has the same function as the first guide member. During the process of installing the developing cartridge into the drum assembly, the second guide member 1221 can guide the developing cartridge to be smoothly installed into the drum assembly. The support hole 1222 is a through hole extending along the first direction.

[0076] In some embodiments, please refer to Figures 6-7 As shown, the developing cartridge may also include an electrode 8, which includes an electrical receiving part 81 and an electrical transmitting part 82. The electrical receiving part 81 may be supported by a support hole 1222 and exposed to the outside through the support hole 1222 so that the electrical receiving part 81 can contact and be electrically connected to the power supply terminal (not shown) of the image forming apparatus.

[0077] In some embodiments, the electrode 8 may not be electrically connected to the powder feeding roller 4, and the powder exiting blade 5 serves as an intermediate component, through which the electrode 8 is electrically connected to the developing roller body 31 to transfer electrical energy. In other embodiments, a separate intermediate component may be used to transfer electrical energy, or the electrode 8 may be in direct contact with the developing roller body 31.

[0078] The electrical transfer unit 82 can contact and be electrically connected to the conductive powder dispensing blade 5, which in turn contacts and is electrically connected to the developing roller body 31. In this configuration, the power supply terminal, the electrical receiving unit 81, the electrical transfer unit 82, the powder dispensing blade 5, and the developing roller body 31 can be connected in series. The power supply terminal can transmit current sequentially through the electrode 8 and the powder dispensing blade 5 to the developing roller body 31, thereby energizing the developing roller body 31. The energized developing roller body 31 can then attract developer using electrostatic attraction.

[0079] In some embodiments, if the powder discharge blade conducts electricity to the developing roller body, the developing roller body and the developing roller shaft may not be electrically connected, that is, the developing roller shaft does not receive or conduct current. For example, the developing roller shaft may be made of a plastic shaft, or, for example, an insulating layer may be provided between the developing roller body and the developing roller shaft.

[0080] In some embodiments, the electrode may be an iron sheet, or the electrode may be made of a conductive material such as a conductive resin.

[0081] Besides the electrode being electrically connected to the developing roller body via the powder discharge blade, there are other embodiments with different electrical connection methods.

[0082] In some other embodiments (not shown in the figures), the electrode may include an electrical receiving section and an electrical transmitting section. The electrical receiving section is in contact with and electrically connected to the power supply terminal of the image forming apparatus, and the electrical transmitting section is in contact with and electrically connected to the developing roller shaft. The powder ejector is made of insulating material and is not electrically connected to the developing roller body. The developing roller shaft is made of conductive material and is electrically connected to the developing roller body. In this configuration, the power supply terminal, electrical receiving section, electrical transmitting section, developing roller shaft, and developing roller body are connected in series. The power supply terminal can transmit current sequentially through the electrical receiving section, electrical transmitting section, and developing roller shaft to the developing roller body. The powder ejector is not used to conduct electricity to the developing roller body, and the powder ejector is also uncharged, which effectively prevents the developing cartridge from malfunctioning due to excessive developer adsorption by the powder ejector.

[0083] In some other embodiments, please refer to Figure 8 As shown, electrode 8 may include an electrical receiving part 81 and an electrical transmitting part 82. The electrical receiving part 81 is in contact with and electrically connected to the power supply terminal (not shown) of the image forming apparatus, and the electrical transmitting part 82 is in contact with and electrically connected to the powder feeding roller shaft 42. The powder feeding roller shaft 42 is electrically connected to the powder feeding roller body 41, and the powder feeding roller body 41 is in contact with and electrically connected to the developing roller body 31. In this configuration, the power supply terminal, electrical receiving part 81, electrical transmitting part 82, powder feeding roller shaft 42, powder feeding roller body 41, and developing roller body 31 are connected in series. The power supply terminal can transmit current sequentially through the electrical receiving part 81, the electrical transmitting part 82, the powder feeding roller shaft 42, and the powder feeding roller body 41 to the developing roller body 31, so that the developing roller body 31 can be in a charged state, thereby allowing the developing roller body 31 to electrostatically adsorb the developer.

[0084] In some embodiments, please refer to Figure 9As shown, electrode 8 may include an electrical receiving part 81, a first electrical transmission part 821, and a second electrical transmission part 822. The electrical receiving part 81 is in contact with and electrically connected to the power supply terminal (image forming apparatus) of the image forming apparatus. The first electrical transmission part 821 is in contact with and electrically connected to the blade holder 51 of the powder discharge blade 5. The second electrical transmission part 822 is in contact with and electrically connected to the developing roller shaft 32. The blade 52 of the powder discharge blade 5 is in contact with and electrically connected to the developing roller body 31. The developing roller shaft 32 is electrically connected to the developing roller body 31. In this configuration, the power supply terminal can transmit current through the electrical receiving part 81 to the first electrical transmission part 821 and the second electrical transmission part 822 respectively. The current can be transmitted sequentially through the first electrical transmission part 821 and the powder discharge blade 5 to the developing roller body 31. The current can also be transmitted sequentially through the second electrical transmission part 822 and the developing roller shaft 32 to the developing roller body 31. This parallel current transmission method allows the developing roller body 31 to be reliably energized and allows the developing agent to be reliably adhered to the developing roller body 31.

[0085] This application also provides some other embodiments regarding the developing cartridge, such as Figures 10-15 The main differences between the developing cartridge shown and the developing cartridge described above lie in the detection rotating component, electrode assembly, insulating component, and idler wheel. Figures 10-15 In the developer cartridge shown, the detection gear 621 for detecting the rotating component is located at the second end 12. The detection gear 621 at the second end can receive power transmitted from the drive unit and rotate. The electrodes of the developer cartridge include an electrode assembly, which includes at least two sub-electrodes. The support member 122 in the developer cartridge may also be provided with an insulating member 1223, which can be used to insulate and separate the at least two sub-electrodes. In the developer cartridge, the drive gear 712 meshes with an idler wheel 78, which meshes with a stirring gear 77. The drive gear 712 transmits power to the stirring gear 77 through the idler wheel 78.

[0086] The following content mainly focuses on Figures 10-15 The electrode assembly and insulating components of the developer cartridge are described below. For other aspects of the structure and function of the developer cartridge, please refer to the embodiments of the developer cartridge described above, which will not be repeated here.

[0087] In some embodiments, the developing cartridge includes an electrode assembly for receiving current from a power supply terminal of the image forming apparatus and for transmitting current to components within the developing cartridge that require current. At least a portion of the electrode assembly may be located at a second end. In other embodiments, at least a portion of the electrode assembly may be located at a first end.

[0088] In some embodiments, please refer to Figure 12 As shown, the electrode assembly may include a first sub-electrode 91, a second sub-electrode 92, and a third sub-electrode 93. Please refer to... Figure 13As shown, the first sub-electrode 91 may include a first electrical receiving part 911 and a first electrical transmitting part 912; the second sub-electrode 92 may include a second electrical receiving part 921 and a second electrical transmitting part 922; and the third sub-electrode 93 may include a third electrical receiving part 931 and a third electrical transmitting part 932. The first electrical receiving part 911, the second electrical receiving part 921, and the third electrical receiving part 931 are used to contact and be electrically connected to the power supply terminals of the image forming apparatus. The first electrical transmitting part 912 contacts and is electrically connected to the developing roller 3; the second electrical transmitting part 922 contacts and is electrically connected to the powder feeding roller 4; and the third electrical transmitting part 932 contacts and is electrically connected to the powder exiting blade 5. The powder feeding roller 4 contacts and is electrically connected to the developing roller 3, and the powder exiting blade 5 contacts and is electrically connected to the developing roller 3. The power supply terminal can transmit current to the developing roller 3 via the first sub-electrode 91, the second sub-electrode 92 and the powder feeding roller 4, and the third sub-electrode 93 and the powder exiting blade 5. This parallel current transmission method ensures that the developing roller is reliably energized, thereby enabling the developing roller 3 to reliably adsorb developer. Furthermore, transmitting external current through three different sub-electrodes to the developing roller 3, the powder feeding roller 4, and the powder exiting blade 5 respectively ensures that the voltage applied to the developing roller 3 is relatively stable, thus ensuring that the developing roller 3 is reliably energized and adsorbs developer.

[0089] In some embodiments, the first sub-electrode, the second sub-electrode, and the third sub-electrode may all be made of conductive resin or of metal sheet.

[0090] In some embodiments, please refer to Figure 12 As shown, the first sub-electrode 91, the second sub-electrode 92, and the third sub-electrode 93 can be supported by the support member 122 located at the second end. The first sub-electrode 91, the second sub-electrode 92, and the third sub-electrode 93 can also be separated by the insulating member 1223 of the support member 122. The support member 122 and the insulating member 1223 can be made of insulating material so that the first sub-electrode 91, the second sub-electrode 92, and the third sub-electrode 93 can be electrically connected without direct contact.

[0091] In some other embodiments (not shown in the figures), the first sub-electrode, the second sub-electrode, and the third sub-electrode may also be directly supported by the housing.

[0092] In some embodiments, the first electrical receiver, the second electrical receiver, and the third electrical receiver may be arranged sequentially in any order in the second direction. For example, please refer to... Figure 15As shown, the first electrical receiver 911, the third electrical receiver 931, and the second electrical receiver 921 are arranged sequentially in the second direction. The distance between the first electrical receiver 911 and the second electrical receiver 921 can be greater than the distance between the second electrical receiver 921 and the third electrical receiver 931. Accordingly, the insulating member 1223 can separate the second electrical receiver and the third electrical receiver.

[0093] In some embodiments (not shown in the figures), both the first and second electrical transmission parts may include cylindrical holes. The end of the developing roller located at the second end can be inserted into the cylindrical hole of the first electrical transmission part, and the end of the powder feeding roller located at the second end can be inserted into the cylindrical hole of the second electrical transmission part, so that the first electrical transmission part is rotatably connected to the developing roller, and the second electrical transmission part is rotatably connected to the powder feeding roller, so as to meet the need for the first electrical transmission part to transmit current to the developing roller in a rotating state, and to meet the need for the second electrical transmission part to transmit current to the powder feeding roller in a rotating state.

[0094] In some embodiments (not shown in the figures), the third electrical transmission part may include an elastic structural member (e.g., a spring). When the third electrical transmission part contacts the powder discharge knife, the third electrical transmission part is in an elastic deformation state. The third electrical transmission part has elastic force inside. Under the action of the elastic force, the third electrical transmission part can stably contact the powder discharge knife, and the third electrical transmission part can reliably transmit current to the powder discharge knife.

[0095] In some other embodiments (not shown in the figure), the third electrical transmission unit and the powder discharge blade can also be fixedly connected by a fastener.

[0096] In some embodiments, please refer to Figure 16 As shown, the power supply terminals of the image forming apparatus may include a first power supply terminal 30 and a second power supply terminal 40, which are used to output current or voltage with different parameters. A first electrical receiver 911 can contact and be electrically connected to the first power supply terminal 30, and both a second electrical receiver 921 and a third electrical receiver 931 can contact and be electrically connected to the second power supply terminal 40. The first power supply terminal 30 can transmit current to the developing roller 3 via a first sub-electrode 91, the second power supply terminal 40 can transmit current to the developing roller 3 sequentially via a second sub-electrode 92 and a powder feeding roller 4, and the second power supply terminal 40 can transmit current to the developing roller 3 sequentially via a third sub-electrode 93 and a powder exit blade 5.

[0097] In some embodiments (not shown in the figures), the first electrical receiving part may be provided with an arcuate recess adapted to the first power supply terminal, the second electrical receiving part may be provided with an arcuate recess adapted to the second power supply terminal, and the third electrical receiving part may be provided with an arcuate recess adapted to the third power supply terminal, so as to have the advantage of stable electrical connection.

[0098] In some other embodiments, please refer to Figures 17-19 In the developer cartridge shown, the first electrical receiving part 911 of the first sub-electrode 91 and the second electrical receiving part 921 of the second sub-electrode 92 can both contact and be electrically connected to the first power supply terminal, and the third electrical receiving part 931 of the third sub-electrode 93 can contact and be electrically connected to the second power supply terminal. In this configuration, please refer to... Figure 20 As shown, the first power supply terminal 30 can transmit current to the developing roller 3 via the first sub-electrode 91, and the first power supply terminal 30 can transmit current to the developing roller 3 sequentially via the second sub-electrode 92 and the powder feeding roller 4. The second power supply terminal 40 can transmit current to the developing roller 3 sequentially via the third sub-electrode 93 and the powder exiting blade 5. Please refer to... Figure 19 As shown, the first electrical receiver 911 and the second electrical receiver 921 can be separated by an insulating member 1223. The distance between the first electrical receiver 911 and the third electrical receiver 931 can be greater than the distance between the first electrical receiver 911 and the second electrical receiver 921.

[0099] In some other embodiments (not shown in the figures), the first electrical receiving portion of the first sub-electrode and the third electrical receiving portion of the third sub-electrode can both contact and be electrically connected to the first power supply terminal, and the second electrical receiving portion of the second sub-electrode can contact and be electrically connected to the second power supply terminal. In this configuration, the first power supply terminal can transmit current to the developing roller via the first sub-electrode, and the first power supply terminal can transmit current to the developing roller sequentially via the third sub-electrode and the powder discharge blade, and the second power supply terminal can transmit current to the developing roller sequentially via the second sub-electrode and the powder delivery roller. Alternatively, the first electrical receiving portion of the first sub-electrode and the third electrical receiving portion of the third sub-electrode can both contact and be electrically connected to the second power supply terminal, and the second electrical receiving portion of the second sub-electrode can contact and be electrically connected to the first power supply terminal. In this configuration, the second power supply terminal can transmit current to the developing roller via the first sub-electrode, and the second power supply terminal can transmit current to the developing roller sequentially via the third sub-electrode and the powder discharge blade, and the first power supply terminal can transmit current to the developing roller sequentially via the second sub-electrode and the powder delivery roller. The distance between the first electrical receiving part and the third electrical receiving part may be less than the distance between the first electrical receiving part and the second electrical receiving part, or the distance between the first electrical receiving part and the third electrical receiving part may be less than the distance between the third electrical receiving part and the second electrical receiving part, and the first electrical receiving part and the third electrical receiving part may be separated by an insulating member.

[0100] In some other embodiments (not shown in the figures), the power supply terminals may include a first power supply terminal, a second power supply terminal, and a third power supply terminal. The first power supply terminal may contact and be electrically connected to a first electrical receiving unit, the second power supply terminal may contact and be electrically connected to a second electrical receiving unit, and the third power supply terminal may contact and be electrically connected to a third electrical receiving unit. In this configuration, the first power supply terminal can transmit current to the developing roller via a first sub-electrode, the second power supply terminal can transmit current to the developing roller sequentially via a second sub-electrode and a powder feeding roller, and the third power supply terminal can transmit current to the developing roller sequentially via a third sub-electrode and a powder exit blade. If one of the sub-electrodes is damaged, the other two sub-electrodes can still transmit current normally, or if two of the sub-electrodes are damaged, the other sub-electrode can still transmit current normally. Therefore, this parallel current transmission method allows the developing roller body to be reliably energized and allows the developing roller body to reliably adhere to the developing agent.

[0101] In some other embodiments, please refer to Figure 21 As shown, the electrode assembly may include a first sub-electrode 91 and a second sub-electrode 92. Correspondingly, the power supply terminals may include a first power supply terminal and a second power supply terminal.

[0102] Please refer to Figure 22 As shown, the first sub-electrode 91 may include a first electrical receiving part 911, a first electrical transmitting part 912, and a second electrical transmitting part 913. The first electrical receiving part 911 can contact and be electrically connected to the first power supply terminal, the first electrical transmitting part 912 can contact and be electrically connected to the developing roller 3, and the second electrical transmitting part 913 can contact and be electrically connected to the powder feeding roller 4. The second sub-electrode may include a second electrical receiving part and a third electrical transmitting part. The second electrical receiving part can contact and be electrically connected to the second power supply terminal, and the third electrical transmitting part can contact and be electrically connected to the powder discharging blade. In this configuration, please refer to... Figure 23 As shown, the first power supply terminal 30 can conduct current through the first electrical receiving unit 911 to the first electrical transmitting unit 912 and the second electrical transmitting unit 913 respectively. The current can be transmitted to the developing roller 3 through the first electrical transmitting unit 912, and the current can also be transmitted to the developing roller through the second electrical transmitting unit 913 and the powder feeding roller 4 in sequence. The second power supply terminal 40 can transmit current to the developing roller 3 through the second electrical receiving unit 921, the third electrical transmitting unit 923 and the powder exiting blade 5 in sequence. Therefore, this parallel current transmission method enables the developing roller 3 to be reliably energized and enables the developing agent to be reliably adhered to the developing roller 3.

[0103] In some embodiments (not shown in the figures), only one electrode may be provided. This electrode includes an electrical receiving part and a first electrical transmitting part, a second electrical transmitting part, and a third electrical transmitting part. The electrical receiving part is in contact with and electrically connected to a first power supply terminal, or the electrical receiving part is in contact with and electrically connected to a second power supply terminal, the first electrical transmitting part is in contact with and electrically connected to the developing roller, the second electrical transmitting part is in contact with and electrically connected to the powder feeding roller, and the third electrical transmitting part is in contact with and electrically connected to the powder exiting blade. That is, one electrode supplies power to the developing roller, the powder feeding roller, and the powder exiting blade.

[0104] In some embodiments (not shown in the figure), a step-down device or a step-up device, such as a diode, can be provided on the electrode to adjust the voltage applied to the developing cartridge at the power supply terminal to meet the power requirements of the developing cartridge.

[0105] 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, the developing cartridge being detachably mounted on an image forming apparatus, the developing cartridge comprising: The box body has a first end and a second end disposed opposite to each other in a first direction, and the box body also has a third end and a fourth end disposed opposite to each other in a second direction; A drive unit, which rotates about a drive axis extending in a first direction, and the drive unit is located at the first end; A developing roller, which rotates about a developing axis extending in a first direction, is located at the third end, and includes a developing roller shaft and a developing roller body, wherein the developing roller shaft drives the developing roller body to rotate; A powder feeding roller that rotates about a powder feeding axis extending in a first direction; A powder discharge blade extends in a first direction and contacts the developing roller; The developing cartridge is characterized by further including an electrode, which is electrically connected to the developing roller body.

2. The developing cartridge according to claim 1, characterized in that, The electrode is not electrically connected to the powder feeding roller, but is electrically connected to the powder discharging knife.

3. The developing cartridge according to claim 2, characterized in that, The powder discharge blade contacts the developing roller body, and the electrode receives external voltage and transmits it to the developing roller body through the powder discharge blade.

4. The developing cartridge according to claim 1, characterized in that, The powder feeding roller includes a powder feeding roller shaft and a powder feeding roller body. The powder feeding roller shaft drives the powder feeding roller body to rotate. The powder feeding roller is electrically connected to the electrode. The powder feeding roller body contacts the developing roller body to transmit voltage.

5. The developing cartridge according to any one of claims 2 to 4, characterized in that, The developing roller body is not electrically connected to the developing roller shaft.

6. The developing cartridge according to claim 5, characterized in that, An insulating layer is provided between the developing roller shaft and the developing roller body.

7. The developing cartridge according to claim 1, characterized in that, The image forming apparatus includes a power supply terminal, which includes a first power supply terminal and a second power supply terminal. The electrode includes a first sub-electrode, a second sub-electrode, and a third sub-electrode. A portion of the first sub-electrode, the second sub-electrode, and the third sub-electrode are in contact with the first power supply terminal, and another portion of the sub-electrodes are in contact with the second power supply terminal. The first sub-electrode is electrically connected to the developing roller, the second sub-electrode is electrically connected to the powder feeding roller, and the third sub-electrode is electrically connected to the powder exiting blade.

8. The developing cartridge according to claim 7, characterized in that, The first sub-electrode and the second sub-electrode are both in contact with the first power supply terminal, and the third sub-electrode is in contact with the second power supply terminal.

9. The developing cartridge according to claim 7, characterized in that, The first sub-electrode is in contact with the first power supply terminal, and the second sub-electrode and the third sub-electrode are both in contact with the second power supply terminal.

10. The developing cartridge according to claim 7, characterized in that, An insulating element is provided between the first sub-electrode, the second sub-electrode, and the third sub-electrode.

11. The developing cartridge according to claim 7, characterized in that, The first sub-electrode includes a first electrical receiving part, the second sub-electrode includes a second electrical receiving part, and the third sub-electrode includes a third electrical receiving part. The first electrical receiving part, the third electrical receiving part, and the second electrical receiving part are all in contact with the power supply terminal and are arranged sequentially in the second direction.

12. The developing cartridge according to claim 11, characterized in that, In the second direction, the distance between the first electrical receiver and the second electrical receiver is greater than the distance between the second electrical receiver and the third electrical receiver.

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