Developing cartridge and drum assembly

Abstract

The present application relates to the technical field of image printing, and in particular to a developing cartridge and a drum assembly. The developing cartridge and the drum assembly are together detachably installed on an image forming device; the developing cartridge comprises a cartridge body, and a developing roller, a powder feeding roller, a power receiving part and an electrode assembly that are installed on the cartridge body; and the cartridge body has a first end and a second end which are oppositely arranged in a first direction. The developing roller, the powder feeding roller and the power receiving part can rotate around an axis extending in the first direction, and the power receiving part is installed at the first end. The electrode assembly is used for electrically connecting an external voltage to the developing roller and / or the powder feeding roller, and in the first direction, the distance between the electrode assembly and the first end and the distance between a contact part of the external voltage and the first end are smaller than the distance between the power receiving part and the second end. Compared with providing on one side wall of an axial non-driving end of the developing cartridge an electrode protruding out of the developing cartridge, the present application reduces the size of the developing cartridge, thereby reducing the manufacturing cost of the developing cartridge, and optimizing the assembling process of the developing cartridge.

Description

A developing box and its drum assembly

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 14, 2023, with application number 202323436682.4 and invention name “A developing box and its drum assembly”, and claims priority to the Chinese patent application filed with the China Patent Office on December 26, 2023, with application number 202323572714.3 and invention name “A developing box and its drum assembly”, and claims priority to the Chinese patent application filed with the China Patent Office on January 30, 2024, with application number 202420225768.8 and invention name “A developing box and its drum assembly”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of image printing technology, and in particular to a developing box and a drum assembly thereof. Background Art

[0003] The developing cartridge is a detachable part widely used in image forming apparatuses. The developing cartridge can be mounted on a drum assembly and can be detachably mounted to the image forming apparatus together with the drum assembly.

[0004] An electrode is also provided on the non-driving side of the developing box, and the electrode can contact the drum assembly to supply power to the developing roller and the powder feeding roller for developing work.

[0005] Since the electrode is installed on the side wall of the non-driving side of the developing box in the axial direction, the volume of the developing box is increased, resulting in an increase in the cost of the developing box, which affects the installation process.

[0006] Application Contents

[0007] An embodiment of the present application provides a developer box and a drum assembly thereof, which are intended to change the position of the electrodes and reduce the axial volume of the developer box.

[0008] An embodiment of the present application provides a developing cartridge, which is detachably mounted on an image forming device together with a drum assembly, and includes:

[0009] The box body has a first end and a second end opposite to each other in the first direction, a third end and a fourth end opposite to each other in the second direction, and a fifth end and a sixth end opposite to each other in the third direction;

[0010] a developing roller rotatable about a first axis extending in a first direction;

[0011] a power receiving portion mounted on the first end, the power receiving portion being rotatable about a second axis extending along the first direction;

[0012] an electrode assembly for electrically connecting the drum assembly and the developing roller, wherein in a first direction, a distance between a receiving portion of the electrode assembly for receiving a voltage on the drum assembly and the first end is smaller than a distance between the second end and the first end;

[0013] The electrode assembly includes a grounding member electrically connected to a ground portion within the image forming apparatus.

[0014] In one possible design, the grounding circuit has an electrode assembly and also includes a grounding resistor. The grounding circuit is connected to the assembly circuit through the grounding resistor to reduce the voltage transmitted by the assembly circuit electrode assembly.

[0015] In one possible design, the assembly circuit electrode assembly has a voltage stabilizing component, and the assembly circuit receives an external voltage through the voltage stabilizing component to stabilize the voltage transmitted by the electrode assembly, thereby stabilizing the external voltage.

[0016] In a possible design, the voltage stabilizing component is a voltage stabilizing diode.

[0017] In a possible design, after the electrode assembly receives the voltage from the drum assembly, the voltage on the electrode assembly first passes through the voltage stabilizing component and then passes through the grounding resistor.

[0018] In a possible design, the developing roller and the grounding resistor are connected in parallel to the voltage stabilizing component.

[0019] In one possible design, the drum assembly has a corona wire and a grid, and the corona wire and the grid are electrically connectable to the image forming device.

[0020] In a possible design, the assembly circuit receiving portion is directly electrically connected to the grid, thereby having a certain voltage.

[0021] In a possible design, the receiving portion can be influenced by the corona wire potential and thus has a voltage.

[0022] In a possible design, the receiving portion is a conductive member detachably provided on the box body, and the conductive member is a plate-shaped conductive material provided at the fifth end.

[0023] In a possible design, the developing box includes a powder discharge knife, the powder discharge knife is arranged in contact with the developing roller, and the receiving portion is the powder discharge knife.

[0024] In a possible design, the drum assembly further includes an external portion, the external portion is made of a conductive material, and is electrically connected to the grid, and the receiving portion is directly electrically connected to the external portion.

[0025] In a possible design, the drum assembly further includes a cleaning block, which is movable along the grid to clean the corona wire, and the peripheral device does not interfere with the movement of the cleaning block.

[0026] In a possible design, the developing box further includes a power module having its own voltage and a voltage transformation module for regulating the voltage, and the power module and the voltage transformation module are both installed in the box body;

[0027] The voltage conversion module is a boost module, which is used to increase the voltage output by the power module.

[0028] An embodiment of the present application further provides a drum assembly, which can cooperate with any of the above-mentioned developing boxes and be electrically connected to the developing box.

[0029] In one possible design, the drum assembly has a corona wire and a grid, and the corona wire and the grid are electrically connectable to the image forming device;

[0030] The drum assembly has a cleaning block that can move back and forth along the grid to clean the corona wire;

[0031] The drum assembly further comprises an external portion, which is made of a conductive material and can be electrically connected to the grid and / or the corona wire without interfering with the movement of the cleaning block;

[0032] The developing box can be electrically connected to the peripheral part.

[0033] In one possible design, the drum assembly also includes a drum drive unit for receiving the driving force of the image forming device. In the extension direction of the grid, the distance from the peripheral unit to the drum drive unit is smaller than the distance from one end to the other end of the drum drive unit.

[0034] In the embodiment of the present application, by providing an electrode assembly on the developer cartridge, and then providing a component on the developer cartridge that can receive the potential of the corona wire on the drum assembly and generate voltage to power the developer roller and / or powder feed roller of the developer cartridge, compared to providing an electrode protruding from the developer cartridge on a side wall of the axial non-driving end of the developer cartridge, the volume of the developer cartridge is reduced, thereby reducing the manufacturing cost of the developer cartridge and optimizing the developer cartridge installation process. It should be understood that the above general description and the detailed description below are merely exemplary and do not limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG1 is a schematic diagram of the three-dimensional structure of the drum assembly in Example 1;

[0036] Figure 2 is a perspective schematic diagram of the developing cartridge in Example 1;

[0037] FIG3 is an exploded schematic diagram of the first end of the developing cartridge in Example 1;

[0038] FIG4 is a perspective schematic diagram of the cooperation between the developing cartridge and the drum assembly in the first embodiment;

[0039] Figure 5 is a second perspective schematic diagram of the cooperation between the developing cartridge and the drum assembly in the first embodiment;

[0040] 6 is a schematic diagram of the overall structure of the first end of the developing cartridge and the drum assembly in the first embodiment;

[0041] 7 is a schematic diagram of the three-dimensional structure of the developing cartridge power supply assembly and the drum assembly in the first embodiment;

[0042] 8 is a schematic diagram of the developing cartridge and the drum assembly in conjunction with the image forming apparatus in Example 1;

[0043] FIG9 is a perspective schematic diagram of another embodiment of the drum assembly in Example 1;

[0044] FIG10 is an exploded schematic diagram of another embodiment of the drum assembly in Example 1;

[0045] FIG11 is a schematic diagram of a first circuit connection when the voltage is too large in Example 1;

[0046] FIG12 is a schematic diagram of a second circuit connection when the voltage is too large in Example 1;

[0047] FIG13 is a schematic diagram of a third circuit connection when the voltage is too large in Example 1;

[0048] Figure 14 is a schematic diagram of the three-dimensional structure of the first end of the developing cartridge in Example 2;

[0049] 15 is a schematic diagram of the three-dimensional structure of the power supply assembly and the developing cartridge in the second embodiment;

[0050] Figure 16 is an overall schematic diagram of the developing cartridge in Example 3;

[0051] FIG17 is an enlarged schematic diagram of I in FIG14;

[0052] Figure 18 is a schematic structural diagram of the first end of the developing cartridge in Example 3;

[0053] Figure 19 is an exploded schematic diagram of the first end of the developing cartridge in Example 3;

[0054] 20 is a perspective structural diagram of the power supply assembly and the developing cartridge in the third embodiment;

[0055] FIG21 is a schematic diagram of another power supply assembly in Example 3;

[0056] Figure 22 is a three-dimensional structural diagram of the first end of the developing cartridge in Example 4;

[0057] Figure 23 is an exploded schematic diagram of the first end of the developing cartridge in Example 4;

[0058] 24 is a perspective structural diagram of the developing cartridge power supply assembly and the developing cartridge in the fourth embodiment;

[0059] Figure 25 is a schematic diagram of a first circuit connection method of the developing cartridge in Example 4;

[0060] Figure 26 is a schematic diagram of a second circuit connection method of the developing cartridge in Example 4;

[0061] 27 is a perspective structural diagram of the power supply assembly and the developing cartridge in a modified example of the fourth embodiment;

[0062] FIG28 is a perspective view of a transformer module in a modified example of the fourth embodiment;

[0063] Figure 29 is an exploded structural diagram of the second end of the developing cartridge in Example 4;

[0064] 30 is a schematic diagram of a first circuit connection mode of the developing cartridge in a fourth modified example of the embodiment;

[0065] Figure 31 is a schematic diagram of the second circuit connection method of the developing box in the modified example of embodiment 4.

[0066] Figures and Symbols: 2, drum assembly; 21, right frame; 22, left frame; 21a, mounting area; 23, locking member; 231, locking portion; 24, chip mounting hole; 25, photosensitive drum; 26, grid; 261, first connection point; 27, corona wire; 271, second connection point; 28, cleaning block; 29-peripheral part; 211, first guide rail; 212, first pushing member; 213, first elastic member; 221, second guide rail; 222, second pushing member; 1, developer cartridge; 10, cartridge body; 11, first end; 12, second end; 13, third end; 14, fourth end; 15, Fifth end; 151, protective cover; 152, mounting recess; 153, protective cover; 16, sixth end; 111, first protective cover; 112, first guide portion; 113, powder filling port; 114, locked portion; 115, first mounting hole; 116, bearing; 1161, slotted portion; 121, second guide portion; 131, developing roller; 132, powder discharge knife; 133, powder feed roller; 141, first pushing portion; 17, chip; 171, chip terminal; 18, chip holder; 40, power receiving portion; 41, developing gear; 42, powder feed gear; 43, driving gear; 44, idler; 45, stirring gear; 47, transmission gear; 51, assembly circuit; 511, connection point; 51 2. Zener diode; 52. Grounding circuit; 521. Grounding resistor; 522. Grounding point; 53. Power supply circuit; 531. First power supply point; 532. Second power supply point; 533. Connecting part; 54. Conductive sheet; 55. Power supply module; 551. Voltage stabilizing element; 552. Power consumption element; 553. First port; 554. Second port; 555. Third port; 56. Power supply module; 561. First interface; 57. Transformer module; 571. Second interface; 572. Third interface; 573. Fourth interface; 574. Transformer coil; 576. Voltage stabilizing element; 577. Capacitor; 578. Magnetic induction component; 58. Magnetic part; 9. Image forming device; 91. Grounding part.

[0067] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0068] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0069] This embodiment provides an image forming device that is a multifunctional image forming device with printing, copying, scanning, and faxing functions. The image forming device includes a device body, a drum assembly, and a developer cartridge. The developer cartridge is removably mounted to the drum assembly. When the developer cartridge is mounted to the drum assembly, the two form a single, integrated process cartridge. The developer cartridge and drum assembly are removably mounted together to the device body. The developer cartridge is used to absorb a developer, primarily toner. The drum assembly receives the developer provided by the developer cartridge, forms an electrostatic latent image, and displays the image on an imaging sheet (e.g., paper).

[0070] The following will describe in detail the possible matching structure of the developing box and the drum assembly with reference to the accompanying drawings.

[0071] It should be noted that the drum assembly is used as a reference, wherein the left and right direction of the drum assembly is the first direction, the front and back direction is the second direction, and the up and down direction is the third direction. The first direction, the second direction and the third direction are arranged perpendicular to each other, and the direction reference of the developing box and the drum assembly is shared.

[0072] Figure 1 shows a schematic diagram of the drum assembly. The drum assembly 2 includes a right frame 21, a left frame 22, a locking member 23, a chip mounting hole 24, and a photosensitive drum 25. In a first direction, the right frame 21 and the left frame 22 are positioned opposite each other, with a mounting area 21a for a developer cartridge defined between the right and left frames 21 and 22. The chip mounting hole 24 allows the chip on the developer cartridge to be exposed outside the drum assembly 2.

[0073] The drum assembly 2 also includes a first guide rail 211 and a second guide rail 221. The first guide rail 211 is located on the right frame 21, and the second guide rail 221 is located on the left frame 22. The first guide rail 211 and the second guide rail 221 are used to guide the developing box 1 to be installed on the drum assembly 2 more conveniently during the process of installing the developing box 1 to the drum assembly 2.

[0074] The drum assembly 2 is further provided with a first urging member 212 and a second urging member 222, which are symmetrically arranged in the first direction. An elastic member is further provided between the first urging member 212 and the second urging member 222 and the drum assembly 2 in the second direction. Due to the presence of the elastic member, when the developer cartridge is installed in the drum assembly 2, the elastic member exerts an urging force on the developer cartridge in the second direction toward the photosensitive drum 25 through the urging member.

[0075] A locking member 23 is also provided on the drum assembly 2 near the right frame. The locking member 23 includes a locking portion 231 and a removal portion 232. When the developer cartridge is installed in the drum assembly 2, the locking portion 231 can cooperate with the developer cartridge to fix the developer cartridge 1 in the drum assembly 2 and prevent the developer cartridge from moving in the drum assembly 2. When the developer cartridge needs to be removed from the drum assembly 2, the locking member 23 is pressed to make the removal portion abut against the developer cartridge, allowing the user to remove the developer cartridge 1 from the drum assembly 2.

[0076] FIG2 is a schematic structural diagram of a developing cartridge. The developing cartridge 1 includes a cartridge body 10 , a transmission assembly, a first protective cover 111 and a conductive assembly.

[0077] The housing 10 has a first end 11 (driving end) and a second end 12 (non-driving end) oppositely disposed in a first direction, a third end 13 and a fourth end 14 oppositely disposed in a second direction, and a fifth end 15 and a sixth end 16 oppositely disposed in a third direction. A first protective cover 111 is removably disposed at the first end 11 of the housing 10 and covers at least a portion of the transmission assembly and the conductive assembly to protect the transmission assembly.

[0078] Figure 3 shows an exploded schematic diagram of the structure of the first end of the developer cartridge. The first protective cover 111 includes a first mounting hole 115, a first guide portion 112, and a locked portion 114. The first guide portion 112 is a cylindrical protrusion extending in a first direction away from the cartridge body 10. Referring to Figure 1 , the first guide portion 112 is configured to engage with the first guide rail 211 on the drum assembly 2 during installation of the developer cartridge 1 into the drum assembly 2. The locked portion 114 is disposed on the rear side of the first protective cover 111 in the second direction and is configured to engage with the locking portion 231 on the drum assembly 2 when the developer cartridge 1 is installed into the drum assembly 2, thereby securing the developer cartridge 1 within the drum assembly 2.

[0079] The following will describe in detail the structure of the drum assembly and the developing box to achieve the developing work with the accompanying drawings.

[0080] Continuing with Figure 1 , the photosensitive drum 25 is at least partially covered by the front frame of the drum assembly 2. The drum assembly 2 is further provided with a grille 26 and a corona wire 27 on the side of the drum assembly 2 proximate the photosensitive drum 25 in the second direction. In the third direction, the grille 26 is located between the corona wire 27 and the photosensitive drum 25. The drum assembly 2 also has a first connection point 261 and a second connection point 271 on the left side of the drum assembly 2 in the first direction, proximate the photosensitive drum 25. The first connection point 261 is electrically connected to the grille 26, and the second connection point 271 is electrically connected to the corona wire 27. When the photosensitive drum 25 is mounted on the device body 9, the first connection point 261 is electrically connected to the device body 9 to power the grille 26, and the second connection point 271 is electrically connected to the device body 9 to power the corona wire 27.

[0081] It should be noted that, under normal circumstances, the voltage on the corona wire 27 is much greater than the voltage on the grid 26 and is relatively unstable. The corona wire 27 ionizes the surrounding air. Since the surface of the photosensitive drum 25 has an insulating film, the corona wire 27, when energized, can attach electrons to the surface of the photosensitive drum 25. Specifically, when energized, the corona wire 27 ionizes the air, and the ionized electrons are attached to the photosensitive drum 25 through the grid 26. When energized, the grid 26 disperses the electrons ionized by the corona wire 27 as they pass through it, allowing them to evenly attach to the photosensitive drum 25. In other words, the grid 26 and the corona wire 27 effectively charge the photosensitive drum 25.

[0082] Moreover, the corona wire 27 is equivalent to a divergent magnetic field. When the developer box 1 and the drum assembly 2 are installed together on the device body 9 and power is supplied, the voltage on the metal conductive component that is closer to the corona wire 27 is greater, and the closer it is to the voltage on the corona wire 27. The voltage on the metal conductive component that is farther away from the corona wire 27 is smaller, and the difference between it and the voltage on the corona wire 27 is greater.

[0083] FIG4 is a schematic diagram of the developer cartridge and the drum assembly after assembly. After the developer cartridge 1 is installed on the drum assembly 2 , the developer cartridge 1 and the drum assembly 2 are integrated, and the developer cartridge 1 and the drum assembly share an end surface.

[0084] Referring to Figures 1 and 4 , a track is provided on the outer frame of the drum assembly 2 at the photosensitive drum 25. A cleaning block 28 is mounted on the track and can move left and right along a first direction. The track is positioned above the corona wire 27 in a third direction. When installed in the drum assembly 2, the cleaning block 28 partially contacts the corona wire 27. As the cleaning block 28 moves left and right along the first direction, it cleans the corona wire 27, preventing impurities from sticking to the corona wire 27 and affecting the ionization effect.

[0085] Continuing with Figure 2 , the developer cartridge 1 is provided with a developing roller 131, a powder discharge knife 132, and a powder feed roller (not shown) at the third end 13. The developing roller 131, the powder discharge knife 132, and the powder feed roller all extend in a first direction. The developing roller 131 and the powder feed roller are supported by both ends of the cartridge body 10 in the first direction and are rotatable relative to the cartridge body 10, with their rotational axes extending in the first direction. In the second direction, the developing roller 131 is closer to the third end 13 than to the fourth end 14.

[0086] Referring to Figures 1 and 2 , after the developing roller 131 is mounted on the drum assembly 2, it contacts the photosensitive drum 25 on the drum assembly 2, so that the developing roller 131 receives the developer transferred from the powder feed roller and transfers the developer to the photosensitive drum 25. A powder discharge knife 132 extends in a first direction and is configured to contact the developing roller 131 and control the thickness of the developer layer on the roller body of the developing roller 131.

[0087] Referring to Figures 2 and 3 , the developer cartridge 1 has a pushing portion disposed at its fourth end 14 in the second direction. Specifically, a first force-bearing member 141 is disposed near the first end 11, and a second force-bearing member (not shown) is disposed near the second end 12. When the developer cartridge 1 is mounted on the drum assembly 2, the first force-bearing member 141 and the second force-bearing member abut against the first and second force-bearing members 212 and 222 of the drum assembly 2 to receive the pushing force of the force-bearing members in the second direction toward the photosensitive drum 25, thereby enabling the developing roller 131 on the developer cartridge 1 to closely adhere to the photosensitive drum 25.

[0088] The first force-bearing member 141 and the second force-bearing member protrude away from the developing roller 131 in the second direction. The pushing member can be a U-shaped, C-shaped or V-shaped protrusion, which can be set according to actual conditions and is not limited in this embodiment.

[0089] It should be noted that the powder discharge knife 132 in this embodiment is a steel knife. When viewed from the first direction, the knife holder of the powder discharge knife 132 is roughly L-shaped, including a blade that contacts the developing roller 131 and a knife holder fixed to the box body 10. In this embodiment, the portion of the powder discharge knife 132 that contacts the box body 10 is made of metal, and the portion that contacts the developing roller 131 is made of insulating material. In some embodiments, the powder discharge knife 132 can be made of other materials, for example, the knife holder of the powder discharge knife 132 that contacts the box body and the blade that contacts the developing roller 131 are both made of metal. The specific setting can be based on actual conditions and is not limited in this embodiment.

[0090] The transmission assembly is provided at the first end 11 of the box body 10. The transmission assembly includes a driving portion rotatably mounted on the first end 11 of the box body 10, and the rotation axis of the driving portion is parallel to the first direction. The driving portion includes a driving gear 43 and a power receiving portion 40 that are coaxially integrally formed. The driving gear 43 is closer to the first end 11 of the box body 10 than the power receiving portion 40 in the first direction. A driving protection portion extending in the first direction is provided on the first protective cover 111 at the first end 11 of the box body 10. The middle of the driving protection portion is a first mounting hole 115 that penetrates the first protective cover 111 in the first direction. The driving portion is rotatably mounted on the driving protection portion along the first mounting hole 115. The power receiving portion 40 is used to receive the driving force output by the image forming device and transmit the driving force to the gears on the transmission assembly.

[0091] The transmission assembly also includes a drive gear 43, a developing gear 41, a powder feeding gear 42, an idler gear 44, and a stirring gear 45. The developing gear 41 receives the power transmitted by the drive gear 43 and drives the roller shaft of the developing roller 131 to rotate together. The powder feeding gear 42 is coaxially fixedly mounted on one end of the powder feeding roller 133 and rotates together with the powder feeding roller 133. The stirring gear 45 is coaxially fixedly mounted on one end of the stirring frame and rotates together with the stirring frame. The idler gear 44 meshes with both the drive gear 43 and the stirring gear 45 to transmit the driving force to the stirring gear. At the same time, the drive gear 43 meshes with the developing gear 41 and the powder feeding gear 42. In other words, the gears on the transmission assembly drive the various roller shafts in the developing cartridge to work, transferring the developer to the photosensitive drum 25, allowing the photosensitive drum 25 to complete the imaging process.

[0092] The developer box 1 is also provided with a powder filling port 113 at the first end 11 for filling powder into the box body 10 of the developer box 1. It also has a cover at the mouth for sealing the powder filling port 113 through the cover after the powder filling is completed to prevent carbon powder from leaking to the outside of the box body 10 through the powder filling port 113.

[0093] Figure 5 shows a schematic diagram of the developer cartridge and drum assembly after assembly. The developer cartridge 1 also includes a chip 17 and a chip terminal 171. The chip terminal 171 is removably mounted on the chip 17. The chip 17 is provided with a snap, and the chip 17 is removably mounted on the first protective cover 111 via the snap. The chip 17 is used to store relevant information about the developer cartridge 1 and transmit the relevant information about the developer cartridge 1 to the image forming device when the developer cartridge 1 and drum assembly 2 are installed in the device body. The chip terminal 171 can be located directly on the chip 17 to achieve electrical connection with the chip 17, or it can be electrically connected to the chip 17 through an intermediary. The chip terminal 171 is used to electrically connect to the image forming device to transmit the information in the chip 17 to the image forming device.

[0094] As can be seen, conventional chips 17 are often equipped with multiple chip terminals 171. The specific number of chip terminals 171 is the same as the number of contact pins on the image forming device. Regardless of the number of chip terminals 171, one chip terminal 171 is always a ground terminal, used to form a ground circuit when the chip 17 is electrically connected to the image forming device. When the developer cartridge 1 is installed in the drum assembly 2, the chip 17 is exposed through the chip mounting hole 24 in the drum assembly 2, making contact with the image forming device.

[0095] In some embodiments, the developer cartridge further includes an electrode assembly electrically connected to an external voltage and the developer roller and / or powder feed roller to provide power to the developer roller and / or powder feed roller. The electrode assembly is disposed in an area of ​​the developer cartridge excluding the non-driven end to reduce the axial volume of the developer cartridge, thereby lowering the manufacturing cost of the developer cartridge and optimizing the developer cartridge installation process. The external voltage can be the voltage provided by the drum assembly, the voltage provided by the image forming device, or the power supply voltage provided by the developer cartridge itself.

[0096] Furthermore, in other embodiments, the electrode assembly is electrically connected to the external voltage and the developing roller body or electrically connected to the external voltage and the developing roller shaft, and regardless of whether the developing roller body and the developing roller shaft are insulated, it provides voltage to the developing roller as described below.

[0097] The following will describe in detail a possible structure for supplying power to the developing roller and the powder feeding roller in the developing cartridge with reference to the accompanying drawings.

[0098] Example 1

[0099] Figure 6 shows the structure of the first end of the developer cartridge and drum assembly after assembly. The developer cartridge 1 also includes a conductive assembly (equivalent to the electrode assembly mentioned above) for conducting electricity to the developer roller 131 and the powder feed roller 133. The conductive assembly includes an assembly circuit 51, a ground circuit 52, and a power supply circuit 53. The assembly circuit 51 is fixed to the developer cartridge 1 via a nut. The ground circuit 52 and the power supply circuit 53 are connected in parallel to the assembly circuit 51, with the parallel connection point being H.

[0100] Specifically, Figure 7 shows a schematic diagram of the electrical connection between the power supply assembly and the developing roller and powder feed roller in the developer cartridge. The receiving portion of the conductive assembly, which is used to receive external voltage, is located at a distance from the first end 11 in the first direction that is shorter than the distance from the second end 12 to the first end 11. The assembly circuit 51 is provided with a connection point 511 and a voltage stabilizing component. In this embodiment, the receiving portion is the connection point 511, and the voltage stabilizing component is a Zener diode 512. The connection point 511 is directly electrically connected to the grid 26, and the distance between the contact point and the first end 11 in the first direction is shorter than the distance from the second end 12 to the first end. The Zener diode 512 is used to stabilize the voltage between the assembly circuit 51 and the grid 26 via the connection point 511. That is, when the grid 26 transmits voltage through the connection point 511, the voltage is transmitted through the Zener diode 512 to the ground circuit 52 and the power supply circuit 53, which are connected in parallel. In this embodiment, a voltage stabilizing diode 512 is provided to prevent the voltage of each node of the circuit from being broken down due to the electricity on the grid 26 or other reasons, thereby preventing the circuit from being damaged. In other embodiments, the voltage stabilizing component can be other electronic components or circuits as long as it can stabilize the voltage.

[0101] Figure 8 shows a schematic diagram of the developer cartridge and drum assembly mounted on the device body. A grounding resistor 521 and a grounding point 522 (equivalent to the grounding member mentioned above) are provided on the grounding circuit 52. The grounding point 522 of the grounding circuit 52 on the developer cartridge 1 is used to connect to the grounding portion 91 of the device body 9 to complete the grounding. Specifically, the voltage of the grounding circuit 52 first passes through the grounding resistor 521, and then contacts the grounding portion 91 on the device body 9 through the grounding point 522 to complete the grounding. The purpose of providing the grounding resistor 521 in this embodiment is to prevent voltage imbalance between the grounding circuit 52 and the power supply circuit 53 due to excessive voltage.

[0102] In other embodiments, the grounding circuit 52 may also be connected to a grounding terminal within the chip terminal 171 on the chip 17 to achieve grounding.

[0103] The power supply circuit 53 is provided with a first power supply point 531 and a second power supply point 532 . The voltage of the power supply circuit 53 is used to supply power to the developing roller 131 through the first power supply point 531 and to supply power to the powder feeding roller 133 through the second power supply point 532 .

[0104] Specifically, in this embodiment, the first power supply point 531 and the second power supply point 532 are both disposed at the first end of the developer cartridge 1 in the first direction, i.e., the end having the drive assembly. The first power supply point 531 supplies power to the developer roller 131, and the second power supply point 532 supplies power to the powder feed roller 133. The first power supply point 531 and the second power supply point 532 function as electrodes.

[0105] The second power supply point 532 can be directly connected to the first power supply point 531, that is, the first power supply point 531 and the second power supply point 532 are integrally formed. When connected to the power supply circuit 53, the first power supply point 531 and the second power supply point 532 are connected in series.

[0106] Alternatively, in other embodiments, the second power supply point 532 and the first power supply point 531 may be separate, and the second power supply point 532 may be connected to any location in any circuit and may be adapted to different circuits. For example, the developing roller 131 and the powder feeding roller 133 may be connected in parallel, or the circuit may be connected only to the powder feeding roller 133 or only to the developing roller 131, etc., without specific limitation herein.

[0107] Alternatively, in other embodiments, the first power supply point 531 and the second power supply point 532 may not be provided, and the power supply points 531 and 532 may be directly connected to the developing roller shaft and the powder feeding roller shaft, or may be connected to the rubber layer outside the developing roller 131. The specific setting may be based on actual conditions and is not limited in this embodiment.

[0108] Specifically, after the developer cartridge 1 and drum assembly 2 are installed together in the device body 9, the first connection point 261 and the second connection point 271 on the drum assembly 2 are electrically connected to the device body 9, and provide voltage to the grid 26 and the corona wire 27. The grid 26 has a voltage (in this case, the grid is the external voltage mentioned above). The assembly circuit 51 is connected to the grid 26 via the connection point 511. After passing through the voltage-stabilizing diode 512 on the assembly circuit 51, the voltage is stably transmitted to the power supply circuit 53 and the ground circuit 52. The voltage of the ground circuit 52 is connected to the ground portion 91 via the grounding resistor 521 to complete the grounding. The voltage of the power supply circuit 53 is then transmitted to the first power supply point 531 and the second power supply point 532 to respectively power the developing roller 131 and the powder feed roller 133, thereby completing the attachment of the toner to the photosensitive drum 25.

[0109] Furthermore, as shown in Figures 9-10, in other embodiments, the drum assembly 2 also includes an external part 29, which is detachably fixed to the drum assembly 2 and is made of a conductive material, which may be a conductive resin, a metal part, etc., and is electrically connected to the grid 26 and / or the corona wire 27. The assembly circuit 51 is directly electrically connected to the external part 29 through the connection point 511, and then receives the voltage on the grid 26 and / or the corona wire 27. The cleaning block 28 moves along the grid 26 to clean the corona wire 27. The external part 29 does not interfere with the movement of the cleaning block 28. The drum assembly 2 also includes a drum drive part, which is located at the first end to receive the driving force of the image forming device and then drive the photosensitive drum 25. In the first direction (the direction in which the grid extends), the distance between the external part 29 and the drum drive part is less than the distance from the first end to the second end of the drum assembly 2, that is, the distance between the external part 29 and the drum drive part is less than the distance from the end of the drum assembly 2 having the drum drive part to the other end.

[0110] Furthermore, the voltages carried by the corona wire 27 and the grid 26 are affected by the voltage provided by the device body 9. Since different image forming devices provide different voltages, the voltages carried by the corona wire 27 and the grid 26 are also different. In most cases, the voltage carried by the corona wire 27 is greater than the voltage carried by the grid 26.

[0111] In this embodiment, power is supplied to the developing roller 131 and the powder feeding roller 133 through the grid 26. Since the grid 26 and the connection point 511 in this embodiment are close to the corona wire 27 and are affected by the electric potential, the voltage entering the assembly circuit 26 is too large and also fluctuates. Therefore, a voltage regulator diode 512 is required to stabilize the voltage, and a grounding resistor 521 is required to be set on the grounding circuit 52 to balance the voltage with the power supply circuit 53.

[0112] Since different developing cartridges 1 and drum assemblies 2 have different voltages entering the assembly circuit 51 when installed in the image forming apparatus 9, different circuits need to be configured according to the voltages provided by the grid 26. The circuit function of this embodiment will be described below.

[0113] Figures 11 through 13 illustrate circuit connections for situations where voltage is too high. Because the voltage provided by grid 26 is excessive, a voltage regulator diode 512 is added to the assembly circuit 51 to prevent circuit breakdown and ensure stable voltage transmission. Furthermore, to ensure circuit integrity, a grounding circuit 52 is required, along with a grounding resistor 521 to balance the voltage between the grounding circuit 52 and the supply circuit 53.

[0114] The difference is, please refer to Figure 11, when the grid 26 provides this voltage, the developing roller 131 and the powder feeding roller 133 can be connected to the power supply circuit 53 in parallel. Alternatively, when the grid 26 provides this voltage, the developing roller 131 and the powder feeding roller 133 can be connected to the power supply circuit 53 in series. Alternatively, please refer to Figure 10, when the grid 26 provides this voltage, only the developing roller 131 or the powder feeding roller 133 is connected in parallel with the ground circuit 52. Alternatively, please refer to Figure 13, when the grid 26 provides this voltage, the powder feeding roller 133 is connected in parallel to the assembly circuit 51 before the voltage regulator diode 512, that is, the powder feeding roller 133 is connected in parallel with the voltage regulator diode 512, and the developing roller 131 is connected in parallel with the ground circuit 52. The specific circuit connection method can be set according to actual conditions and is not limited in this embodiment.

[0115] When the voltage is large, that is, the voltage provided by the grid 26 is large, it is still necessary to add a voltage regulator diode 512 to the assembly circuit 51 to prevent circuit breakdown and ensure stable voltage transmission. However, at this voltage, the grounding circuit 52 can be omitted, that is, the power supply circuit 53 is connected in series with the assembly circuit 51.

[0116] The difference is that when the grid 26 provides this voltage, the developing roller 131 and the powder feed roller 133 can be connected in parallel with each other and then connected in series to the grid 26 via the Zener diode 512. When the grid 26 provides this voltage, the developing roller 131 and / or the powder feed roller 133 are connected in series with the grid 26 via the Zener diode 512. When the grid 26 provides this voltage, the powder feed roller 133 is connected in parallel to the assembly circuit 51 before the Zener diode 512, that is, the powder feed roller 133 is connected in parallel with the Zener diode 512, and the developing roller 131 is connected in series with the Zener diode 512 and then connected in parallel with the powder feed roller 133. The specific circuit connection method can be set according to actual conditions and is not limited in this embodiment.

[0117] When the voltage is slightly higher, that is, when the voltage provided by the grid 26 is slightly higher and does not cause circuit breakdown, the voltage stabilizing diode 512 can be omitted from the assembly circuit 51. However, a grounding circuit 52 is still required, connected in parallel with the power supply circuit 53 and then to the grid 26. When the grid 26 provides this voltage, the grounding circuit 52 must be provided with a grounding resistor 521.

[0118] The difference is that, when the grid 26 provides this voltage, the developing roller 131 and / or the powder feeding roller 133 can be connected in parallel with the ground circuit 52 before being connected to the grid 26. Alternatively, when the grid 26 provides this voltage, the developing roller 131 can be connected in parallel with the powder feeding roller 133 first, then in parallel with the ground circuit 52, and finally connected to the grid 26. The specific circuit connection method can be set according to actual conditions and is not limited in this embodiment.

[0119] When the voltage is appropriate, when the voltage provided by the grid 26 is almost the same as the voltage required by the developing roller 131 and / or the powder feeding roller 133, and no circuit breakdown occurs, and when the operation is stable, the assembly circuit 51 does not need the voltage regulator diode 512 and the grounding circuit 52.

[0120] The difference is that when the grid 26 provides this voltage, the developing roller 131 and / or the powder feed roller 133 can be directly connected in series with the grid 26. Alternatively, when the grid 26 provides this voltage, the powder feed roller 133 and the developing roller 131 are first connected in parallel and then connected in series with the grid 26. In this embodiment, the voltage is suitable, which specifically means that the voltage provided by the grid 26 is the same as the voltage required for the developing roller 131 and / or the powder feed roller 133 to operate normally. The specific circuit connection method can be set according to actual conditions and is not limited in this embodiment.

[0121] When the grid 26 is connected in series with either the powder feeding roller 133 or the developing roller 131, the voltage on the developing roller 131 or the powder feeding roller 133 is greater than the voltage when the grid 26 is connected in series with the powder feeding roller 133 and the developing roller 131. When the grid 26 is connected in series with the powder feeding roller 133 and the developing roller 131, the voltage on the developing roller 131 and the powder feeding roller 133 is less than the voltage when the developing roller 131 and the powder feeding roller 133 are first connected in parallel and then connected in series with the grid 26.

[0122] The various circuit connection methods described above are merely several preferred circuit change methods proposed according to different voltages when the voltage on the grid 26 changes. The use of other voltage stabilizing components and other circuit connection methods are acceptable as long as the voltage can be stably transmitted to the developing roller 131 and / or the powder feeding roller 133 through the grid 26, and no specific limitation is made here.

[0123] Example 2

[0124] In this embodiment, what is different from the first embodiment is that the connection point 511 of the assembly circuit 51 is not connected to the grid 26, but to the powder knife 132. The rest of the corresponding structures and the corresponding power supply methods are exactly the same as those in the first embodiment.

[0125] Please refer to Figures 14 and 15 for details. Figure 14 is a schematic diagram of the first end of the developer cartridge in another embodiment. Figure 15 shows a schematic diagram of the power supply assembly in Figure 14 cooperating with the developing roller, powder feed roller, and powder discharge blade in the developer cartridge. The powder discharge blade 132 is located at the third end 13 of the developer cartridge 1 in the second direction and extends along the first direction. The powder discharge blade 132 is capable of contacting the developing roller 131 to control the thickness of the toner on the developing roller 131, ensuring a uniform toner layer adhered to the developing roller 131. This prevents uneven thickness of the toner layer delivered to the developing roller 131 by the powder feed roller 133, which can cause color variations during imaging and affect image quality. The powder discharge blade 132 includes a blade holder and a blade, and the blade holder is fixed to the cartridge body 10. In this embodiment, the blade holder is made of a conductive metal material. The connection point 511 of the assembly circuit 51 is fixed to the cartridge body 10 together with the blade holder of the powder discharge blade 132 via screws.

[0126] In this embodiment, when the developer cartridge 1 and drum assembly 2 are installed together in the device body 9, the grid 26 and corona wire 27 are both electrically connected to the device body 9 and have a voltage. At this point, because the powder knife 132 is relatively close to the corona wire, the potential of the corona wire 27 also applies to the metal conductive blade holder (the powder knife and power supply assembly are equivalent to the electrode assembly described above) of the powder knife 132 (the powder knife 132 is equivalent to the conductive member, that is, in this embodiment, the receiving portion is the powder knife) and the voltage is not much different from that on the grid 26. The connection point 511 on the assembly circuit 51 is connected to the knife holder of the powder discharge knife 132. After the voltage passes through the voltage regulator diode 512 on the assembly circuit 51, it is stably transmitted to the power supply circuit 53 and the ground circuit 52. The voltage through the ground circuit 52 is connected to the grounding part 91 through the grounding resistor 521 to complete the grounding. The voltage through the power supply circuit 53 is respectively supplied to the developing roller 131 and the powder feeding roller 133 via the first power supply point 531 and the second power supply point 532, so that the knife holder has voltage through the potential of the induction corona wire 27, and then supplies power to the developing roller 131 and / or 133, thereby completing the attachment of the toner to the photosensitive drum 25.

[0127] Compared with Example 1, this embodiment is equivalent to using a powder discharge knife 132 instead of the grid 26 to transmit voltage to the assembly circuit 51, the grounding circuit 52, and the power supply circuit 53, and completes the power supply to the developing roller 131 and / or the powder feeding roller 133. The specific power supply process is exactly the same as that of Example 1 and will not be elaborated on here.

[0128] It should be noted that because corona wire 27 is energized and needs to ionize the air, the voltage on corona wire 27 is very high. Corona wire 27 acts as a divergent magnetic field, and the closer the metal conductive component is to corona wire 27, the greater the voltage. Therefore, the powder knife 132 is positioned near corona wire 27 so that it can be influenced by the voltage on corona wire 27 and possess a certain voltage (similar to the principle of wireless charging). Powder knife 132 is connected to developer roller 131. The voltage-carrying powder knife 132 supplies power to developer roller 131, ionizing the developer on developer roller 131. Since developer roller 131 is in contact with the photosensitive drum, the charged developer adheres to the charged photosensitive drum, completing the development process. This is equivalent to the developer cartridge electrode being positioned at third end 13 in this embodiment.

[0129] In this embodiment, the voltage of the powder knife 132 is similar to the voltage of the grid 26. The voltage on the powder knife 132 may also change due to reasons such as the image forming device. There may be different circuit implementations depending on the voltage on the powder knife 132. These different circuit implementations are exactly the same as those in Example 1 and will not be elaborated on here.

[0130] Furthermore, the blade holder on the powder discharge knife 132 can be made of other conductive materials that can be affected by the electric field and thus have voltage, in addition to being made of metal conductive materials. However, metal conductive materials are a preferred embodiment in this embodiment. The specific setting can be made according to actual conditions and is not limited in this embodiment.

[0131] Furthermore, in this embodiment, the powder knife 132 is arranged at the third end 13 of the box body 10. In the first direction, the distance from the powder knife 132 to the first end 11 is smaller than the distance from the first end 11 to the second end 12, that is, the distance from the center of the powder knife 1323 to the first end 11 is smaller than the distance from the first end 11 to the second end 12. Alternatively, in other embodiments, one end or both ends of the powder knife 132 extend out of the first end 11 and the second end 12 of the box body 10 respectively. As long as the extension distance is not too long, it can be regarded as meeting the above-mentioned distance comparison requirements.

[0132] Example 3

[0133] In this embodiment, what is different from the second embodiment is that a conductive part that can be used to receive the voltage of the corona wire 27 is provided on the developing box 1, that is, the conductive part is the receiving part. In this embodiment, the conductive part is a conductive sheet 54, and the connection point 511 of the assembly circuit 51 is connected to the conductive sheet 54. The remaining circuit elements and circuit connections are exactly the same as those in the second embodiment.

[0134] Figure 16 shows a schematic diagram of a developing box in another embodiment, in which a conductive sheet 54 is provided on the fifth end 15 of the developing box 1, and the conductive sheet 54 receives the electric potential of the corona wire 27 and forms a voltage. The assembly circuit 51 is connected to the conductive sheet 54, and the voltage is provided to the developing roller 131 and / or the powder feeding roller 133 through the power supply circuit 53.

[0135] In this embodiment, the conductive sheet 54 is fixed to the developing box 1 by screws. In other embodiments, the conductive sheet 54 can be fixed to the developing box 1 by means of snap connection, adhesive connection, etc. The specific setting can be made according to actual conditions and is not limited in this embodiment.

[0136] It should be noted that because the corona wire 27 is energized and needs to ionize the air, the voltage on the corona wire 27 is very high (the corona wire is referred to as the external voltage above). A conductive sheet 54 is positioned near the developer roller of the developer cartridge (the conductive sheet and the power supply assembly are referred to as the electrode assembly above, with the conductive sheet acting as the receiving portion). This sheet is influenced by the voltage on the corona wire 27 and possesses a certain voltage (similar to the principle of wireless charging). The conductive sheet 54 is connected to the developer roller 131. The voltage-carrying conductive sheet 54 supplies power to the developer roller 131, ionizing the developer on the developer roller 131. Since the developer roller 131 is in contact with the photosensitive drum, the charged developer adheres to the charged photosensitive drum, completing the development process.

[0137] Figure 17 is a schematic diagram of the structure of the first end of the developer cartridge in another embodiment. The developer cartridge 1 further includes a chip holder 18, which is disposed on the first protective cover 111 of the developer cartridge 1. The chip 17 and the chip terminal 171 are disposed on the chip holder 18. In the second direction, the chip terminal 171 is farther from the developing roller 131 than the power receiving portion 40.

[0138] As shown in Figures 18 to 20 , when the developer cartridge 1 and drum assembly 2 are installed together in the device body 9, the grid 26 and corona wire 27 are both electrically connected to the device body 9 and have voltage applied to them. At this point, the voltage applied to the conductive sheet 54 is also applied to the conductive sheet 54 due to the potential of the corona wire 27. Connection point 511 on the assembly circuit 51 is connected to the conductive sheet 54. After passing through the voltage-stabilizing diode 512 on the assembly circuit 51, the voltage is stably transmitted to the power supply circuit 53 and the ground circuit. The voltage on the ground circuit 52 is connected to the ground portion 91 via the grounding resistor 521, completing the grounding. The voltage on the power supply circuit 53 then supplies power to the developing roller 131 and the powder feed roller 133 via the first power supply point 531 and the second power supply point 532, respectively. This ensures that the developing roller 131 and / or the powder feed roller 133 are powered via the conductive sheet 54, thereby completing the attachment of toner to the photosensitive drum 25.

[0139] It should be noted that when the developing cartridge 1 is installed on the drum assembly 2, there is no contact between the conductive sheet 54 and the drum assembly 2.

[0140] Compared with Example 2, this embodiment is equivalent to using a conductive sheet 54 instead of the powder discharge knife 132 to transmit voltage to the assembly circuit 51, the grounding circuit 52, and the power supply circuit 53, and completes the power supply to the developing roller 131 and / or the powder feeding roller 133. The specific power supply process is exactly the same as that of Example 2 and will not be elaborated on here.

[0141] Furthermore, the distance between the conductive sheet 54 and the corona wire 27, as well as the size of the conductive sheet 54, can affect the magnitude of the voltage generated by the electrical potential of the corona wire 27. The farther the conductive sheet 54 is from the corona wire 27, the smaller the voltage generated. Alternatively, the smaller the area of ​​the conductive sheet 54, the smaller the voltage generated. Specifically, when the area of ​​the conductive sheet 54 remains unchanged, the magnitude of the voltage generated is related to the distance between the sheet 54 and the corona wire 27; when the distance between the sheet 54 and the corona wire 27 remains unchanged, the magnitude of the voltage generated is related to the area of ​​the conductive sheet 54.

[0142] In this embodiment, the position of the conductive sheet 54 remains unchanged and is disposed between the chip terminal 171 and the power receiving portion 40 in the second direction. Its length in the first direction is approximately half of the length of the developer cartridge 1. In other embodiments, the conductive sheet 54 may be as long as the developer cartridge 1 or occupy one-third of the total length of the developer cartridge 1. The length and area of ​​the conductive sheet 54 vary, and the voltage provided to the developing roller 131 and / or the powder feeding roller 133 also varies. The conductive sheet 54 may also be disposed in other positions and its area may also vary. The specific setting may be based on actual conditions and is not limited in this embodiment.

[0143] In this embodiment, the conductive sheet 54 can be integrally formed with the assembly circuit 51 or separately provided. When the conductive sheet 54 is fixedly mounted on the developer cartridge 1, the voltage across the conductive sheet 54 is determined by the area of ​​the conductive sheet 54. Different developer cartridges 1 require different voltages when powering the developer roller 131 and / or the powder feed roller 133. Conductive sheets 54 of varying areas can be manufactured in advance based on the specific product. Compared to the first and second embodiments, this allows for the voltage supplied to the developer cartridge 1 to be controlled, simplifying subsequent steps.

[0144] In this embodiment, the voltage on the conductive sheet 54 is similar to the voltage of the powder knife 132. The voltage on the conductive sheet 54 may also change due to reasons such as the image forming device. Depending on the voltage on the conductive sheet 54, there may be different circuit implementation methods. These different circuit implementation methods are exactly the same as those in Example 2 and will not be elaborated on here.

[0145] This embodiment also provides a new way for a power supply assembly to contact and supply power to the developing roller 131 and the powder feeding roller 133. For details, please continue to refer to Figures 19 and 20. The developing box includes a bearing 116, and the bearing 116 is provided with a slot portion 1161. The first supply point 531 and the second supply point 532 are both sleeve structures, which are correspondingly sleeved on the developing roller shaft and the powder feeding roller shaft, and are arranged between the bearing 116 and the first end 11 of the developing box 1. The developing roller 131 and the powder feeding roller 133 can rotate relative to the first power supply point 531 and the second power supply point 532. The first power supply point 531 is provided with a connecting portion 533, which cooperates with the slot portion 1161. The power supply circuit 53 is connected to the connecting portion 533 through the slot portion 1161 to provide voltage to the developing roller 131 and / or the powder feeding roller 133.

[0146] Compared to Example 1, this embodiment only changes the connection method between the power supply circuit 53 and the developing roller 131 and the powder feed roller 133, and does not change the location where the power supply circuit 53 provides voltage to the powder feed roller 133 and / or the developing roller 131. The connection method of this embodiment saves more space in the developing cartridge 1 than that of Example 1 and is also more stable. Other connection methods are also possible in other embodiments, and there is no excessive limitation.

[0147] As shown in Figure 21, it is a schematic diagram of the power supply component in another embodiment. In this embodiment, a separate power supply module 55 can be set up. The power supply module 55 is provided with a voltage stabilizing element 551 (equivalent to the voltage stabilizing diode 512) and a power consumption element 552 (equivalent to the grounding resistor 531). The power supply module 55 is also provided with a first port 553, a second port 554 and a third port 555. The first port 553 is connected to the element that provides voltage (grid 26 or conductive sheet 54, etc.), the second port 554 is connected to the developing roller 131 and / or the powder feeding roller 133 to supply power to the developing roller 131 and / or the powder feeding roller 133, and the third port 555 is connected to the grounding portion 91 on the device body 9. By providing such a power supply module 55, the number of power supply components can be effectively simplified.

[0148] By providing a power supply assembly on the developing box and connecting it to the developing box, and then providing a component on the developing box that can receive the electric potential of the corona wire on the drum assembly and then generate voltage to power the developing roller and / or powder feeding roller of the developing box, the volume of the developing box is reduced compared to providing an electrode protruding from the developing box on the side wall of the axial non-driving end of the developing box. Moreover, the electrical components used in the power supply assembly will not be installed on the image forming device and will not have excessive force abutting against the image forming device. In addition, the service life of the electrical components is relatively long, so that after using the power supply assembly, the convenience of subsequent recycling is enhanced, and it can be reused multiple times, which is more environmentally friendly and saves costs.

[0149] Example 4

[0150] The difference between this embodiment and the first embodiment is that this embodiment has its own power module 56, and the transformer module 57 connected to the power module 56 in this embodiment is also different from that in the first embodiment. Other than that, the rest of the structure is exactly the same as that in the first embodiment.

[0151] FIG22 is a schematic diagram of the first end of the developer cartridge in another embodiment, and FIG23 is an exploded schematic diagram of a portion of the structure in FIG22 . Referring to FIG22 and FIG23 , the fifth end 15 of the developer cartridge 1 has a mounting recess 152 , in which a power module 56 and a transformer module 57 are mounted (the power module in this case is the external voltage as described above). The developer cartridge 1 also includes a protective cover 151 , which can be covered on the mounting recess 152 to protect the power module 56 and the transformer module 57 .

[0152] As shown in Figure 24, it is a schematic diagram of the electrical connection between the power supply assembly and the developing roller and the powder feeding roller in the developing box. Please refer to Figures 22 and 23. The power module 56 has a first interface 561, and the transformer module 57 has a second interface 571, a third interface 572, a fourth interface 573, a transformer coil 574, a grounding resistor 521, a voltage stabilizing element 576 and a capacitor 577. The first interface 561 of the power module 56 is connected to the second interface 571 on the transformer module 57 to transfer the voltage to the transformer module 57. The third interface 572 on the transformer module 57 is connected to the grounding circuit 52, and the fourth interface 573 is connected to the power supply circuit 53.

[0153] Figures 25 and 26 are schematic diagrams of the circuit connection method of the developer box. The power module 56 is connected to the second interface 571 through the first interface 561, thereby transmitting the voltage to the transformer module 57. The transmitted voltage is increased by the transformer coil 574. The increased voltage passes through the grounding resistor 521 to the third interface 572, and then connects to the ground circuit 52, and finally connects to the grounding part 91 to complete the grounding. In addition, the increased voltage is connected to the power supply circuit 53 through the fourth interface 573, thereby connecting to the developing roller 131 and / or the powder feeding roller 133, supplying power to the developing roller 131 and / or the powder feeding roller 133, so that the developer box 1 can work.

[0154] Among them, after the power module 56 transmits the voltage to the transformer module 57, under the action of the transformer coil 574, the voltage stabilizing element 576, the capacitor 577 and other components, the voltage transmitted by the power module 56 to the transformer module 57 can be increased to reach the voltage required when the developing roller 131 and / or the powder feeding roller 133 are working, and it is ensured that it can be transmitted stably without fluctuations.

[0155] Furthermore, in this embodiment, the power module 56 may be a battery. In other embodiments, the power module 56 may be other components capable of storing and releasing electrical energy, which is not specifically limited herein.

[0156] Furthermore, in this embodiment, the voltage stabilizing element 576 on the voltage transformation module 57 is a voltage stabilizing diode. In other embodiments, it can be other voltage stabilizing elements, which are not specifically limited here.

[0157] Furthermore, in this embodiment, the number and type of electronic components on the transformer module 57 are not fixed. Any module that can change the voltage transmitted by the power module 56 and output it stably is acceptable, and no specific restrictions are imposed here.

[0158] FIG27 is a schematic diagram showing the electrical connection between the power supply assembly and the developing roller and the powder feeding roller in the developing cartridge, and FIG26 is a schematic diagram showing the voltage conversion module. Please refer to FIG26 and FIG27 (a modified example of the fourth embodiment) in combination. The voltage conversion module 57 is provided with a magnetic induction component 578. A magnetic member 58 is provided on the side of the protective cover 153 at the fifth end 15 of the developing cartridge 1 near the first end 11 of the developing cartridge 1. The magnetic induction component 578 is provided corresponding to the magnetic member 58 in the second direction. The magnetic induction component 578 can function as a switch, that is, when the magnetic induction component 578 senses the magnetic force of the magnetic member 58, it is equivalent to a disconnected state, and when the magnetic induction component 578 does not sense the magnetic force of the magnetic member 58, it is equivalent to a connected state.

[0159] Specifically, FIG29 is a schematic diagram of the second end of the developer cartridge, and FIG30 and FIG31 are schematic diagrams of the circuit connection method of the developer cartridge. When the power module 56 transmits the voltage to the transformer module 57 and the developer cartridge 1 is not installed on the device body 9, in order to protect the voltage on the power module 56 from being consumed prematurely, this embodiment is provided with a magnetic sensing component 578 on the transformer module 57. At this time, the magnetic sensing component 578 is directly opposite to the magnetic member 58 and can sense the magnetic force on the magnetic member 58, so that the magnetic sensing component 578 is in a disconnected state, which is equivalent to the power module 56 being in an unused state. When the developing box 1 is installed in the device body 9 and starts to start, the power receiving part 40 receives the driving force, thereby driving the transfer gear 47 to rotate, and the transfer gear 47 transfers the driving force to the second end 12 to drive the detection part located at the second end. The rotating transfer gear 47 interferes with the magnetic induction component 578 to receive the magnetic force on the magnetic component 58, that is, the magnetic induction component 578 is closed, and the transformer module 57 is in a connected state, so that the voltage transmitted from the power supply module 56 to the transformer module 57 can be transmitted. The specific process is exactly the same as that of Example 4, and will not be elaborated here.

[0160] In other embodiments, the developing box 1 may not have a detection component at the second end, and may also not have a transfer gear 47. The power module 56 is set at the first end, and the magnetic sensing component 578 can interfere with the magnetic force on the magnetic component 58 by driving gears such as the gear 43, thereby achieving the above-mentioned effect. The details will not be elaborated here.

[0161] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A developing cartridge, wherein the developing cartridge and the drum assembly are detachably mounted on an image forming device, wherein: The developing box comprises: The box body has a first end and a second end opposite to each other in the first direction, a third end and a fourth end opposite to each other in the second direction, and a fifth end and a sixth end opposite to each other in the third direction; a developing roller capable of rotating about a first axis extending along a first direction; a power receiving part, mounted on the first end, the power receiving part being rotatable about a second axis extending along the first direction; an electrode assembly, for electrically connecting the drum assembly and the developing roller, wherein in a first direction, a distance between a receiving portion of the electrode assembly for receiving a voltage on the drum assembly and the first end is smaller than a distance from the second end to the first end; The electrode assembly includes a grounding member electrically connected to a grounding portion within the image forming apparatus.

2. The developing cartridge according to claim 1, characterized in that: The electrode assembly further includes a grounding resistor for reducing the voltage transmitted by the electrode assembly.

3. The developing cartridge according to claim 1, characterized in that: The electrode assembly has a voltage stabilizing component for stabilizing the voltage transmitted by the electrode assembly.

4. The developing cartridge according to claim 3, characterized in that: The voltage stabilizing component is a voltage stabilizing diode.

5. The developing cartridge according to claim 3, characterized in that: After receiving the voltage on the drum assembly, the voltage on the electrode assembly first passes through the voltage stabilizing component and then passes through the grounding resistor.

6. The developing cartridge according to claim 5, characterized in that: The developing roller and the grounding resistor are connected in parallel to the voltage stabilizing component.

7. The developing cartridge according to claim 1, characterized in that: The drum assembly has a corona wire and a grid, and the corona wire and the grid are electrically connectable to the image forming device.

8. The developing cartridge according to claim 7, wherein: The receiving portion is directly electrically connected to the grid.

9. The developing cartridge according to claim 7, wherein: The receiving portion can be influenced by the corona wire potential and thus has a voltage.

10. The developing cartridge according to claim 9, characterized in that: The receiving portion is a conductive member detachably disposed on the box body, and the conductive member is a plate-shaped conductive material disposed on the fifth end.

11. The developing cartridge according to claim 9, characterized in that: The developing box comprises a powder discharge knife, the powder discharge knife is arranged in contact with the developing roller, and the receiving portion is the powder discharge knife.

12. The developing cartridge according to claim 7, characterized in that: The drum assembly further comprises an external device part, which is made of a conductive material and is electrically connected to the grid, and the receiving part is directly electrically connected to the external device part.

13. The developing cartridge according to claim 12, characterized in that: The drum assembly further comprises a cleaning block, which is movable along the grid to clean the corona wire, and the peripheral device does not interfere with the movement of the cleaning block.

14. The developing cartridge according to claim 1, wherein: The developing box further comprises a power module having a voltage and a voltage transformation module for adjusting the voltage, and the power module and the voltage transformation module are both installed on the box body; The voltage conversion module is a boost module, which is used to increase the voltage output by the power module.

15. A drum assembly, which can cooperate with the developer box according to any one of claims 1 to 14 and is electrically connected to the developer box.

16. The drum assembly according to claim 15, characterized in that The drum assembly has a corona wire and a grid, and the corona wire and the grid are electrically connectable to the image forming device; The drum assembly has a cleaning block that can move back and forth along the grid to clean the corona wire; The drum assembly further comprises an external part, which is made of a conductive material and can be electrically connected to the grid and / or the corona wire without interfering with the movement of the cleaning block; The developing box can be electrically connected to the peripheral device.

17. The drum assembly according to claim 16, characterized in that The drum assembly also includes a drum driving unit for receiving the driving force of the image forming device. In the extension direction of the grille, the distance from the peripheral unit to the drum driving unit is smaller than the distance from one end to the other end of the drum driving unit.

Images