Developing box and drum assembly thereof

Abstract

The invention relates to the technical field of image printing, in particular to a developing box and a drum assembly thereof. The developing box and the drum assembly are detachably installed on the image forming equipment together, the developing box comprises a box body, a developing roller, a powder feeding roller, a power receiving part and an electrode assembly, the developing roller, the powder feeding roller, the power receiving part and the electrode assembly are installed on the box body, and the box body is provided with a first end and a second end which are oppositely arranged in the first direction. The developing roller, the powder feeding roller and the power receiving part can rotate around the 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 external voltage with the developing roller and / or the powder feeding roller, and in the first direction, the distance between the contact part of the electrode assembly and the external voltage and the first end is smaller than the distance between the power receiving part and the second end. Compared with an electrode protruding out of the developing box on one side wall of the axial non-driving end of the developing box, the volume of the developing box is reduced, so that the manufacturing cost of the developing box is reduced, and the assembling process of the developing box is optimized.

Description

Technical Field

[0001] The present application relates to the technical field of image printing, and in particular to a developing box and a drum assembly thereof. Background Art

[0002] 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.

[0003] 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.

[0004] 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. Summary of the invention

[0005] An embodiment of the present application provides a developer box and a drum assembly thereof, which are intended to change the position of the electrode and reduce the axial volume of the developer box.

[0006] The 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: 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.

[0007] In a 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 electrode assembly of the assembly circuit.

[0008] In a 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.

[0009] In a possible design, the voltage stabilizing component is a voltage stabilizing diode.

[0010] In a possible design, after the electrode assembly receives 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.

[0011] In a possible design, the developing roller and the grounding resistor are connected in parallel to the voltage stabilizing component.

[0012] In one possible design, the drum assembly has a corona wire and a grid, and the corona wire and the grid can be electrically connected to the image forming device.

[0013] In a possible design, the assembly circuit receiving part is directly electrically connected to the grid so as to have a certain voltage.

[0014] In a possible design, the receiving portion can be influenced by the corona wire potential and thus be provided with a voltage.

[0015] In a possible design, the receiving portion is a conductive member detachably disposed on the box body, and the conductive member is a plate-shaped conductive material disposed at the fifth end.

[0016] 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.

[0017] In a possible design, the drum assembly further includes an external device part, the external device part 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.

[0018] 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.

[0019] In a possible design, the developing box further includes 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.

[0020] The embodiment of the present application also provides a drum assembly, which can cooperate with any of the developer boxes described above and be electrically connected to the developer box.

[0021] In one possible design, the drum assembly has a corona wire and a grid, and the corona wire and the grid can be electrically connected 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.

[0022] 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.

[0023] In an embodiment of the present application, an electrode assembly is provided on the developer box, and then a drum assembly is used or a component is provided on the developer 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 the powder feeding roller of the developer box. Compared with providing an electrode protruding from the developing box on a side wall of the axial non-driving end of the developer box, the volume of the developing box is reduced, thereby reducing the manufacturing cost of the developing box and optimizing the developing box installation process.

[0024] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the three-dimensional structure of the drum assembly in the first embodiment; Figure 2 is a three-dimensional schematic diagram of the developing box in the first embodiment; Figure 3 is an exploded schematic diagram of the first end of the developing cartridge in the first embodiment; Figure 4 The three-dimensional diagram of the cooperation between the developing box and the drum assembly in the first embodiment Figure 1 ; Figure 5 The three-dimensional diagram of the cooperation between the developing box and the drum assembly in the first embodiment Figure 2 ; Figure 6 It is a schematic diagram of the overall structure of the first end of the developing box and the drum assembly in the first embodiment; Figure 7 It is a schematic diagram of the three-dimensional structure of the developing box power supply assembly and the drum assembly in the first embodiment; Figure 8 It is a schematic diagram of the cooperation between the developing box and the drum assembly and the image forming device in the first embodiment; Fig. 9 is a three-dimensional schematic diagram of another implementation of the drum assembly in Example 1; Fig.10is an exploded schematic diagram of another implementation method of the drum assembly in Example 1; Fig.11 This is a schematic diagram of the first circuit connection when the voltage is too large in the first embodiment; Fig.12 This is a second circuit connection schematic diagram when the voltage is too large in the first embodiment; Fig.13 This is a schematic diagram of the third circuit connection when the voltage is too large in the first embodiment; Fig.14 is a schematic diagram of the three-dimensional structure of the first end of the developing box in the second embodiment; Fig.15 It is a schematic diagram of the three-dimensional structure of the power supply assembly and the developing box in the second embodiment; Fig.16 is an overall schematic diagram of the developing box in the third embodiment; Fig.17 yes Fig.14 A magnified schematic diagram of middle I; Fig.18 is a schematic structural diagram of the first end of the developing cartridge in the third embodiment; Fig.19 is an exploded schematic diagram of the first end of the developing cartridge in the third embodiment; Fig. 20 It is a three-dimensional structural diagram of the cooperation between the power supply assembly and the developing box in the third embodiment; Fig.21 This is a schematic diagram of another power supply component in Embodiment 3; Fig. 22 is a three-dimensional structural diagram of the first end of the developing cartridge in the fourth embodiment; Fig.23 is an exploded schematic diagram of the first end of the developing cartridge in the fourth embodiment; Fig.24 It is a three-dimensional structural diagram of the developing box power supply assembly and the developing box in the fourth embodiment; Fig.25 It is a schematic diagram of a first circuit connection mode of the developing cartridge in the fourth embodiment; Fig.26 is a schematic diagram of a second circuit connection method of the developing cartridge in the fourth embodiment; Fig. 27 is a three-dimensional structural diagram of the cooperation between the power supply assembly and the developing box in a modified example of the fourth embodiment; Fig.28 is a three-dimensional diagram of a transformer module in a modified example of the fourth embodiment; Fig.29 is an exploded structural diagram of the second end of the developing cartridge in the fourth embodiment; Fig.30 is a schematic diagram of a first circuit connection method of a developing cartridge in a modified example of the fourth embodiment; Fig.31It is a schematic diagram of a second circuit connection method of the developing box in a modified example of the fourth embodiment.

[0026] Reference numerals: 2. Drum assembly; 21. Right frame; 22. Left frame; 21a. Mounting area; 23. Locking piece; 231. Locking part; 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 forced push piece; 213. First elastic piece; 221. Second guide rail; 222. Second forced push piece; 1. developer box; 10. box 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 part; 113. powder filling port; 114. locked part; 115. first mounting hole; 116. bearing; 1161. slotted part; 121. second guide part; 131. developer roller; 132. powder discharge knife; 133. powder feeding roller; 141. first forced pushing part; 17. chip; 171. chip terminal; 18. chip frame; 40. power receiving part; 41. developer gear; 42. powder feeding gear; 43. driving gear; 44. idler; 45. stirring gear; 47. transmission gear; 51. assembly circuit; 511. connection point; 512. 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 member; 9. Image forming device; 91. Grounding part. 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

[0027] 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.

[0028] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0029] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0030] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0031] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0032] This embodiment provides an image forming device, which is a multifunctional image forming device with functions such as printing, copying, scanning, and faxing. The image forming device includes a device body, a drum assembly, and a developer box. The developer box is detachably mounted on the drum assembly. After the developer box is mounted on the drum assembly, the two are equivalent to an integrated structure to form a processing box. The developer box and the drum assembly can be detachably mounted on the device body together. Among them, the developer box is used to absorb the developer, and the developer is mainly toner. The drum assembly is used to receive the developer provided by the developer box, form an electrostatic latent image, and display the image on an imaging sheet (such as paper).

[0033] The following will describe in detail the possible matching structure of the developing box and the drum assembly in conjunction with the accompanying drawings.

[0034] It should be explained first that, taking the drum assembly as a reference, the left and right direction of the drum assembly is a first direction, the front and back direction is a second direction, and the up and down direction is a 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.

[0035] like Figure 1The structure diagram of the drum assembly is shown, and 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 arranged opposite to each other, and there is a mounting area 21a for mounting a developing cartridge between the right frame 21 and the left frame 22. The chip mounting hole 24 is used to avoid the chip on the developing cartridge so that the chip can be exposed outside the drum assembly 2.

[0036] 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 installation of the developing box 1 to the drum assembly 2.

[0037] The drum assembly 2 is also provided with a first pushing member 212 and a second pushing member 222, which are symmetrically arranged in the first direction. An elastic member is also arranged between the first pushing member 212 and the second pushing member 222 and the drum assembly 2 in the second direction. Due to the presence of the elastic member, when the developing cartridge is installed on the drum assembly 2, the elastic member applies a pushing force toward the photosensitive drum 25 in the second direction to the developing cartridge through the pushing member.

[0038] 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 developing cartridge is installed in the drum assembly 2, the locking portion 231 can cooperate with the developing cartridge to fix the developing cartridge 1 in the drum assembly 2 to prevent the developing cartridge from moving in the drum assembly 2. When the developing cartridge needs to be removed from the drum assembly 2, the locking member 23 is pressed to make the removal portion contact the developing cartridge, so that the user can remove the developing cartridge 1 from the drum assembly 2.

[0039] like Figure 2 It is a schematic structural diagram of a developing box, wherein the developing box 1 comprises a box body 10, a transmission assembly, a first protective cover 111 and a conductive assembly.

[0040] The box body 10 has a first end 11 (driving end) and a second end 12 (non-driving end) arranged oppositely in the first direction, a third end 13 and a fourth end 14 arranged oppositely in the second direction, and a fifth end 15 and a sixth end 16 arranged oppositely in the third direction. The first protective cover 111 is detachably arranged at the first end 11 of the box body 10, and at least covers a part of the transmission component and the conductive component to protect the transmission component.

[0041] like Figure 3FIG. 1 is a schematic diagram of the exploded structure of the first end of the developing 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 the first direction away from the cartridge body 10. Figure 1 The first guide portion 112 is used to cooperate with the first guide rail 211 on the drum assembly 2 during the process of installing the developer cartridge 1 to the drum assembly 2. The locked portion 114 is arranged at the rear side of the first protective cover 111 in the second direction, and is used to engage with the locking portion 231 on the drum assembly 2 when the developer cartridge 1 is installed in the drum assembly 2, so as to fix the developer cartridge 1 in the drum assembly 2.

[0042] The following will describe in detail the structure of the drum assembly and the developing box to realize the developing work in conjunction with the accompanying drawings. Please continue to refer to 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 also provided with a grid 26 and a corona wire 27 on the side close to the photosensitive drum 25 in the second direction, and in the third direction, the grid 26 is located between the corona wire 27 and the photosensitive drum 25. The drum assembly 2 is also provided with a first connection point 261 and a second connection point 271 on the left side in the first direction close to the photosensitive drum 25, the first connection point 261 is electrically connected to the grid 26, and the second connection point 271 is electrically connected to the corona wire 27. When the photosensitive drum 25 is installed on the device body 9, the first connection point 261 is electrically connected to the device body 9 to supply power to the grid 26, and the second connection point 271 is electrically connected to the device body 9 to supply power to the corona wire 27.

[0043] It should be noted that, in general, the voltage on the corona wire 27 is much greater than the voltage on the grid 26, and the voltage on the corona wire 27 is relatively unstable. The corona wire 27 ionizes the surrounding air. The surface of the photosensitive drum 25 has an insulating film. The corona wire 27 can attach electrons to the surface of the photosensitive drum 25 after being energized. Specifically, after the corona wire 27 is energized, it will ionize the air, and the ionized electrons will attach to the photosensitive drum 25 through the grid 26. After the grid 26 is energized, the electrons ionized by the corona wire 27 can be scattered when passing through the grid 26, and then evenly attached to the photosensitive drum 25. That is, it is equivalent to the grid 26 and the corona wire 27 charging the photosensitive drum 25 together.

[0044] 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 the voltage and the corona wire 27 is greater.

[0045] like Figure 4The figure shows a schematic diagram of the developer box and the drum assembly after being assembled. After the developer box 1 is installed on the drum assembly 2, the developer box 1 and the drum assembly 2 are equivalent to a whole, and the developer box 1 and the drum assembly share an end surface.

[0046] Please refer to Figure 1 and Figure 4 At the photosensitive drum 25 of the drum assembly 2, the outer frame is also provided with a track, on which a cleaning block 28 is arranged, and the cleaning block 28 can move left and right along the first direction on the track. The track is located above the corona wire 27 in the third direction, and when the cleaning block 28 is installed on the drum assembly 2, part of the cleaning block 28 is in contact with the corona wire 27. When the cleaning block 28 moves left and right along the first direction, it can clean the corona wire 27 to prevent impurities from sticking to the corona wire 27 and affecting the ionization effect.

[0047] Please continue to refer to Figure 2 The developing box 1 is provided with a developing roller 131, a powder discharge knife 132 and a powder feeding roller (not shown in the figure) at the third end 13, and the developing roller 131, the powder discharge knife 132 and the powder feeding roller all extend in the first direction. The developing roller 131 and the powder feeding roller are supported by both ends of the box body 10 in the first direction and can rotate relative to the box body 10, and the rotation axis extends in the first direction. In the second direction, the developing roller 131 is closer to the third end 13 than the fourth end 14.

[0048] Please refer to Figure 1 and Figure 2 After the developing roller 131 is installed on the drum assembly 2, the developing roller 131 contacts the photosensitive drum 25 on the drum assembly 2, so that the developing roller 131 receives the developer transferred by the powder feeding roller and transfers the developer to the photosensitive drum 25. The powder discharge knife 132 extends along the first direction, and the powder discharge knife 132 is used to contact the developing roller 131 and control the thickness of the developer layer on the roller body of the developing roller 131.

[0049] Please refer to Figure 2 and Figure 3 , the fourth end 14 of the developing box 1 in the second direction is provided with a forced pushing portion. Specifically, a first force-bearing member 141 is provided near the first end 11, and a second force-bearing member (not shown in the figure) is provided near the second end 12. The first force-bearing member 141 and the second force-bearing member are in contact with the first forced pushing member 212 and the second forced pushing member 222 of the drum assembly 2 when the developing box 1 is installed on the drum assembly 2, so as to receive the forced pushing force of the forced pushing member toward the photosensitive drum 25 in the second direction, so that the developing roller 131 on the developing box 1 can be closely attached to the photosensitive drum 25.

[0050] The first force-bearing member 141 and the second force-bearing member protrude away from the developing roller 131 in the second direction, and the pushing member may be a U-shaped, C-shaped or V-shaped protrusion, which may be specifically set according to actual conditions and is not limited in this embodiment.

[0051] It should be noted that the powder knife 132 in this embodiment is a steel knife. When viewed from the first direction, the knife holder of the powder knife 132 is roughly L-shaped, including a blade in contact with the developing roller 131 and a knife holder fixed to the box body 10. In this embodiment, the portion of the powder knife 132 in contact with the box body 10 is made of metal, and the portion in contact with the developing roller 131 is made of insulating material. In some embodiments, the powder knife 132 can be made of other materials, such as the knife holder of the powder knife 132 in contact with the box body and the blade in contact with the developing roller 131 are both made of metal. The specific setting can be based on actual conditions, and this embodiment is not limited here.

[0052] The transmission assembly is arranged at the first end 11 of the box body 10, and the transmission assembly includes a driving part rotatably mounted on the first end 11 of the box body 10, and the rotation axis of the driving part is parallel to the first direction. The driving part includes a driving gear 43 and a power receiving part 40 which are coaxially integrally formed, and the driving gear 43 is closer to the first end 11 of the box body 10 than the power receiving part 40 in the first direction. A driving protection part extending in the first direction is arranged on the first protective cover 111 of the first end 11 of the box body 10, and the middle of the driving protection part is a first mounting hole 115 penetrating the first protective cover 111 in the first direction, and the driving part is rotatably mounted on the driving protection part along the first mounting hole 115. The power receiving part 40 is used to receive the driving force output by the image forming device and transmit the driving force to the gear on the transmission assembly.

[0053] The transmission assembly also includes a driving 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 driving 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 is meshed with the driving gear 43 and the stirring gear 45 at the same time to transmit the driving force to the stirring gear. At the same time, the driving gear 43 is meshed with the developing gear 41 and the powder feeding gear 42 at the same time. That is, the gears on the transmission assembly drive the roller shafts in the developing box to move and work, and transmit the developer to the photosensitive drum 25, so that the photosensitive drum 25 completes the imaging work.

[0054] 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. The opening is also provided with a cover 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.

[0055] Figure 5The figure shows a schematic diagram of the developer box and the drum assembly after being assembled. The developer box 1 also includes a chip 17 and a chip terminal 171. The chip terminal 171 is detachably mounted on the chip 17. The chip 17 is provided with a buckle. The chip 17 is detachably mounted on the first protective cover 111 through the buckle. The chip 17 is used to store relevant information of the developer box 1, and transmit the relevant information of the developer box 1 to the image forming device when the developer box 1 and the drum assembly 2 are installed in the device body. The chip terminal 171 can be directly located on the chip 17 to realize electrical connection with the chip 17, or it can be realized by an intermediate piece to realize electrical connection with the chip 17. The chip terminal 171 is used to electrically connect with the image forming device to transmit the information in the chip 17 to the image forming device.

[0056] It is known that the existing chip 17 is mostly provided with a plurality of chip terminals 171, and the specific number of chip terminals 171 is the same as the number of contact pins on the image forming device. It is known that no matter how many chip terminals 171 are provided, there is always a chip terminal 171 that is a ground terminal, which is used to form a ground loop when the chip 17 is electrically connected to the image forming device. When the developing cartridge 1 is installed in the drum assembly 2, the chip 17 is exposed through the chip mounting hole 24 on the drum assembly 2 and contacts the image forming device.

[0057] In some embodiments, the developer box further includes an electrode assembly, which is electrically connected to an external voltage and a developer roller and / or a powder feeding roller to provide power to the developer roller and / or the powder feeding roller. The electrode assembly is disposed in an area other than the non-driving end of the developer box to reduce the axial volume of the developer box, thereby reducing the manufacturing cost of the developer box and optimizing the developer box installation process. The external voltage can be a voltage provided by a drum assembly, a voltage provided by an image forming device, or a power supply voltage provided by the developer box.

[0058] Furthermore, in other embodiments, the electrode assembly is electrically connected to an external voltage and a developing roller body or to an external voltage and a 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.

[0059] A possible structure for supplying power to the developing roller and the powder feeding roller in the developing box will be described in detail below with reference to the accompanying drawings.

[0060] Embodiment 1 like Figure 6 The figure shows the structure of the first end after the developer box and the drum assembly are assembled. The developer box 1 also includes a conductive component (equivalent to the electrode component mentioned above) for conducting electricity to the developer roller 131 and the powder feeding roller 133. The conductive component includes an assembly circuit 51, a grounding circuit 52, and a power supply circuit 53. The assembly circuit 51 is fixed to the developer box 1 by a nut. The grounding circuit 52 and the power supply circuit 53 are connected in parallel to the assembly circuit 51, and the parallel connection point is H.

[0061] Specifically, Figure 7 The schematic diagram shows the electrical connection between the power supply assembly and the developing roller and the powder feeding roller in the developing box. The distance between the receiving part of the conductive assembly for receiving the external voltage and the first end 11 in the first direction is smaller than the distance between the second end 12 and 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 part is the connection point 511, and the voltage stabilizing component is a voltage stabilizing 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 smaller than the distance between the second end 12 and the first end. The voltage stabilizing diode 512 is used to stabilize the voltage when the assembly circuit 51 is connected to the grid 26 through the connection point 511. That is, when the grid 26 transmits the voltage through the connection point 511, the voltage is transmitted to the grounding circuit 52 and the power supply circuit 53 connected in parallel with each other through the voltage stabilizing diode 512. 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 causing circuit damage. In other embodiments, the voltage stabilizing component can be other electronic components or circuits as long as it can stabilize the voltage.

[0062] like Figure 8 The figure shows a schematic diagram of the developer box and the drum assembly being installed on the device body, and a grounding resistor 521 and a grounding point 522 (equivalent to the grounding member mentioned above) are provided on the grounding circuit 52. Among them, the grounding point 522 of the grounding circuit 52 on the developer box 1 is used to connect with the grounding part 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 part 91 on the device body 9 through the grounding point 522 to complete the grounding. The purpose of setting the grounding resistor 521 in this embodiment is to prevent the voltage of the grounding circuit 52 and the power supply circuit 53 from being unbalanced due to excessive voltage.

[0063] 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.

[0064] 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 .

[0065] Specifically, in this embodiment, the first power supply point 531 and the second power supply point 532 are both arranged at the first end of the developing box 1 in the first direction, that is, the end having the driving assembly. The first power supply point 531 supplies power to the developing roller 131, and the second power supply point 532 supplies power to the powder feeding roller 133. The first power supply point 531 and the second power supply point 532 act as electrodes.

[0066] 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.

[0067] Alternatively, in other embodiments, the second power supply point 532 and the first power supply point 531 may be separately arranged, and the second power supply point 532 may be connected to any place of 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., which are not specifically limited here.

[0068] 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 point 531 and the second power supply point 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 configuration may be based on actual conditions, and this embodiment does not limit this.

[0069] Specifically, after the developing box 1 and the drum assembly 2 are installed together on 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 (the grid is the external voltage mentioned above at this time), and the assembly circuit 51 is connected to the grid 26 through the connection point 511. After the voltage passes through the voltage-stabilizing diode 512 on the assembly circuit 51, it is stably transmitted to the power supply circuit 53 and the grounding circuit 52. The voltage of the grounding circuit 52 is connected to the grounding portion 91 via the grounding resistor 521 to complete the grounding. The voltage of 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, thereby completing the attachment of the toner to the photosensitive drum 25.

[0070] Further, such as Figure 9-10As shown, in other embodiments, the drum assembly 2 also includes an external part 29, which is detachably fixed on the drum assembly 2 and is made of a conductive material, such as 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 a first end to receive the driving force of the image forming device and then drive the photosensitive drum 25. In a first direction (the extension direction of the grid), 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.

[0071] 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.

[0072] In this embodiment, the developing roller 131 and the powder feeding roller 133 are powered by 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.

[0073] Since different developing cartridges 1 and drum assemblies 2 have different voltages entering assembly circuit 51 when installed in image forming device 9, different circuits need to be provided according to the different voltages provided by grid 26. The circuit function of this embodiment will be described below.

[0074] like Figures 11 to 13 The figure shows a circuit connection diagram when the voltage is too large. Since the voltage provided by the grid 26 is too large, a voltage regulator diode 512 is added to the assembly circuit 51 to prevent the circuit from breaking down and ensure stable voltage transmission. In addition, in order to ensure the integrity of the circuit loop, a grounding circuit 52 is required, and a grounding resistor 521 is required on the grounding circuit 52 to balance the voltage on the grounding circuit 52 and the power supply circuit 53.

[0075] The difference is, please refer to Fig.11, when the grid 26 provides the 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 the 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 Fig.10 , when the grid 26 provides the voltage, only the developing roller 131 or the powder feeding roller 133 is connected in parallel with the grounding circuit 52. Alternatively, please refer to Fig.13 When the grid 26 provides the voltage, the powder feeding roller 133 is connected in parallel to the assembly circuit 51 before the voltage stabilizing diode 512, that is, the powder feeding roller 133 is connected in parallel with the voltage stabilizing diode 512, and the developing roller 131 is connected in parallel with the grounding circuit 52. The specific circuit connection method can be set according to actual conditions, and this embodiment is not limited here.

[0076] 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 may not be set, that is, the power supply circuit 53 is connected in series with the assembly circuit 51.

[0077] The difference is that, when the grid 26 provides the voltage, the developing roller 131 and the powder feeding roller 133 can be connected in parallel to each other and then connected in series to the grid 26 through the voltage stabilizing diode 512. When the grid 26 provides the voltage, the developing roller 131 and / or the powder feeding roller 133 are connected in series to the grid 26 through the voltage stabilizing diode 512. When the grid 26 provides the voltage, the powder feeding roller 133 is connected in parallel to the assembly circuit 51 before the voltage stabilizing diode 512, that is, the powder feeding roller 133 is connected in parallel to the voltage stabilizing diode 512, and the developing roller 131 is connected in series to the voltage stabilizing diode 512 and then connected in parallel to the powder feeding roller 133. The specific circuit connection method can be set according to actual conditions, and this embodiment is not limited here.

[0078] When the voltage is slightly larger, that is, the voltage provided by the grid 26 is slightly larger and cannot cause circuit breakdown, the voltage stabilizing diode 512 may not be provided on the assembly circuit 51, but a grounding circuit 52 is still required to be provided, connected in parallel with the power supply circuit 53 and then connected to the grid 26. When the grid 26 provides the voltage, the grounding circuit 52 needs to be provided with a grounding resistor 521.

[0079] The difference is that, when the grid 26 provides the voltage, the developing roller 131 and / or the powder feeding roller 133 can be connected in parallel with the grounding circuit 52 and then connected to the grid 26. Alternatively, when the grid 26 provides the voltage, the developing roller 131 can be connected in parallel with the powder feeding roller 133 and then connected in parallel with the grounding circuit 52 and then connected to the grid 26. The specific circuit connection method can be set according to actual conditions, and this embodiment is not limited here.

[0080] 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 cannot cause circuit breakdown, and when the operation is stable, the assembly circuit 51 does not need the voltage regulator diode 512 and the grounding circuit 52.

[0081] The difference is that, when the grid 26 provides the voltage, the developing roller 131 and / or the powder feeding roller 133 can be directly connected in series with the grid 26. Alternatively, when the grid 26 provides the voltage, the powder feeding roller 133 is first connected in parallel with the developing roller 131 and then connected in series with the grid 26. In this embodiment, the voltage is appropriate, 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 feeding roller 133 to work normally. The specific circuit connection method can be set according to actual conditions, and this embodiment is not limited here.

[0082] When the grid 26 is connected in series with one of 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 on the developing roller 131 and the powder feeding roller 133 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.

[0083] 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. As long as other voltage stabilizing components and other circuit connection methods can be used, 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, no specific limitation is made here.

[0084] Embodiment 2 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, and the other corresponding structures and corresponding power supply methods are exactly the same as those in the first embodiment.

[0085] Please refer to Fig.14 and Fig.15 , Fig.14 is a schematic diagram of the first end of the developing box in another embodiment, Fig.15 Shown Fig.14Schematic diagram of the cooperation between the power supply assembly and the developing roller, powder feeding roller and powder discharge knife in the developing box, the powder discharge knife 132 is located at the third end 13 of the developing box 1 in the second direction, and extends along the first direction. The powder discharge knife 132 can contact with the developing roller 131 to control the thickness of the toner on the developing roller 131, so that the toner attached to the developing roller 131 can be uniform, and prevent the toner layer thickness delivered to the developing roller 131 by the powder feeding roller 133 from being uneven, resulting in changes in the depth of the image color during imaging, affecting the imaging quality. Among them, the powder discharge knife 132 includes a knife holder and a blade, and the knife holder is fixed on the box body 10. In this embodiment, the knife holder is made of metal conductive material, and the connection point 511 of the assembly circuit 51 is fixed to the box body 10 together with the knife holder of the powder discharge knife 132 by screws.

[0086] In this embodiment, when the developing box 1 and the drum assembly 2 are installed in the device body 9 together, the grid 26 and the corona wire 27 are both electrically connected to the device body 9 and have voltage. At this time, because the powder knife 132 is close to the corona wire, under the action of the potential of the corona wire 27, the metal conductive knife frame (the powder knife and the power supply assembly are equivalent to the electrode assembly mentioned above) of the powder knife 132 (the powder knife 132 is equivalent to the conductive member, that is, in this embodiment, the receiving part is the powder knife) also has voltage, and the difference with the voltage on the grid 26 is not much. 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-stabilizing diode 512 on the assembly circuit 51, it is stably transmitted to the power supply circuit 53 and the grounding circuit 52. The voltage through the grounding 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.

[0087] Compared with the first embodiment, the present embodiment is equivalent to using the powder discharge knife 132 instead of the grid 26 to transmit the 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 the first embodiment, and will not be elaborated here.

[0088] It should be noted that, since the corona wire 27 is energized and the air needs to be ionized, the voltage on the corona wire 27 is very large. The corona wire 27 is equivalent to a divergent magnetic field. The closer the metal conductive part is to the corona wire 27, the greater the voltage. Therefore, the powder knife 132 is set close to the corona wire 27, and can be affected by the voltage on the corona wire 27 and have a certain voltage (similar to the principle of wireless charging). The powder knife 132 is connected to the developing roller 131. The powder knife 132 with voltage supplies power to the developing roller 131, ionizes the developer on the developing roller 131, and the developing roller 131 is in contact with the photosensitive drum. The developer with a certain amount of electrons adheres to the photosensitive drum with a certain amount of electrons, thereby completing the development, which is equivalent to the developer box electrode being set at the third end 13 in this embodiment.

[0089] 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 described in detail here.

[0090] Furthermore, the knife holder on the powder 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, but metal conductive materials are a preferred implementation in this embodiment. The specific setting can be based on actual conditions, and this embodiment is not limited here.

[0091] Further, in the present embodiment, the powder knife 132 is arranged at the third end 13 of the box body 10, and 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, or, 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 extending distance is not too long, it can be regarded as meeting the above-mentioned distance comparison requirements.

[0092] Embodiment 3 In this embodiment, what is different from the second embodiment is that a conductive member capable of receiving the voltage of the corona wire 27 is provided on the developing box 1, that is, the conductive member is the receiving part. In this embodiment, the conductive member 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.

[0093] Fig.16The figure shows a schematic diagram of a developing box in another embodiment, wherein a conductive sheet 54 is provided on the fifth end 15 of the developing box 1, 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.

[0094] 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 this embodiment is not limited here.

[0095] It should be noted that, since the corona wire 27 is energized and the air needs to be ionized, the voltage on the corona wire 27 is very large (the corona wire is the external voltage mentioned above). A conductive sheet 54 is arranged near the developing roller of the developing box (the conductive sheet and the power supply assembly are the electrode assembly mentioned above, and the conductive sheet is equivalent to the receiving part), which can be affected by the voltage on the corona wire 27 and have a certain voltage (similar to the principle of wireless charging). The conductive sheet 54 is connected to the developing roller 131, and the conductive sheet 54 with voltage supplies power to the developing roller 131, ionizes the developer on the developing roller 131, and the developing roller 131 is in contact with the photosensitive drum, and the developer with a certain amount of electrons adheres to the photosensitive drum with a certain amount of electrons, thereby completing the development.

[0096] Fig.17 The first end of the developing box is a schematic diagram of the structure in another embodiment, the developing box 1 further includes a chip frame 18, which is arranged on the first protective cover 111 of the developing box 1, and the chip 17 and the chip terminal 171 are arranged on the chip frame 18. In the second direction, the chip terminal 171 is farther from the developing roller 131 than the power receiving part 40.

[0097] like Figures 18 to 20 When the developing box 1 and the drum assembly 2 are installed in the device body 9 together, the grid 26 and the corona wire 27 are both electrically connected to the device body 9 and have voltage. At this time, under the action of the potential of the corona wire 27, the conductive sheet 54 also has voltage, and the connection point 511 on the assembly circuit 51 is connected to the conductive sheet 54. After the voltage passes through the voltage-stabilizing diode 512 on the assembly circuit 51, it is stably transmitted to the power supply circuit 53 and the grounding circuit. The voltage of the grounding circuit 52 is connected to the grounding part 91 via the grounding resistor 521 to complete the grounding. The voltage of 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 developing roller 131 and / or the powder feeding roller 133 are supplied with power through the conductive sheet 54, thereby completing the attachment of the toner to the photosensitive drum 25.

[0098] 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. Compared with the second embodiment, this embodiment is equivalent to using a conductive sheet 54 to replace 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 the second embodiment, and will not be elaborated here.

[0099] Furthermore, the distance between the conductive sheet 54 and the corona wire 27 and the size of the conductive sheet 54 can affect the voltage generated by the conductive sheet 54 receiving the potential of the corona wire 27. The farther the conductive sheet 54 is from the corona wire 27, the smaller the voltage generated thereon. Alternatively, the smaller the area of ​​the conductive sheet 54, the smaller the voltage generated thereon. That is, when the area of ​​the conductive sheet 54 remains unchanged, the voltage generated thereon is related to the distance between the conductive sheet 54 and the corona wire 27; when the distance between the conductive sheet 54 and the corona wire 27 remains unchanged, the voltage generated thereon is related to the area size of the conductive sheet 54.

[0100] In this embodiment, the conductive sheet 54 remains in the same position 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 about half of the developer box 1. In other embodiments, the conductive sheet 54 may be as long as the developer box 1 or occupy one-third of the total length of the developer box 1. The length and area of ​​the conductive sheet 54 are different, and the voltage provided to the developing roller 131 and / or the powder feeding roller 133 is also different. The conductive sheet 54 may also be disposed in other positions, and its area may also be different. The specific setting may be based on actual conditions, and this embodiment is not limited here.

[0101] In this embodiment, the conductive sheet 54 can be integrally formed with the assembly circuit 51, or can be separately provided. When the conductive sheet 54 is fixedly installed in the developer box 1, the voltage on the conductive sheet 54 is determined by the area of ​​the conductive sheet 54. Different developer boxes 1 require different voltages when supplying power to the developer roller 131 and / or the powder feeding roller 133. Conductive sheets 54 of different areas can be manufactured in advance according to different products. Compared with the first and second embodiments, the voltage provided to the developer box 1 can be adjusted, which simplifies the subsequent steps.

[0102] 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. There may be different circuit implementations depending on the voltage on the conductive sheet 54. These different circuit implementations are exactly the same as those in Example 2 and will not be elaborated on here.

[0103] This embodiment also provides a new way for the power supply assembly to contact the developing roller 131 and the powder feeding roller 133 to supply power. Fig.19 and Fig. 20The 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, and the connecting portion 533 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.

[0104] Compared with the first embodiment, this embodiment only changes the connection mode between the power supply circuit 53 and the developing roller 131 and the powder feeding roller 133, and does not change the position where the power supply circuit 53 provides voltage to the powder feeding roller 133 and / or the developing roller 131. The connection mode of this embodiment saves more space of the developing box 1 than the first embodiment, and is also more stable. In other embodiments, there may be other connection modes, without making too many restrictions.

[0105] like Fig.21 The figure shows a schematic diagram of a power supply component in another embodiment. In this embodiment, a separate power supply module 55 can be provided. The power supply module 55 is provided with a voltage stabilizing element 551 (equivalent to a voltage stabilizing diode 512) and a power consumption element 552 (equivalent to a 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 a voltage-providing element (grid 26 or a conductive sheet 54, etc.), the second port 554 is connected to a developing roller 131 and / or a 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 a grounding portion 91 on a device body 9. By providing such a power supply module 55, the number of power supply components can be effectively simplified. By arranging a power supply assembly on the developing box and connecting it to the developing box, and then arranging a drum assembly or a component on the developing box that can receive the potential of the corona wire on the drum assembly and then generate voltage to power the developing roller and / or the powder feeding roller of the developing box, compared with arranging an electrode protruding from the developing box on the side wall of the axial non-driving end of the developing box, the volume of the developing box is reduced. 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 cost-saving.

[0106] Embodiment 4 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.

[0107] Fig. 22 is a schematic diagram of the first end of the developing box in another embodiment, Fig.23 for Fig. 22 Please refer to the exploded diagram of the structure in the middle part. Fig. 22 and Fig.23 The fifth end 15 of the developing box 1 has a mounting recess 152, in which a power module 56 and a transformer module 57 are mounted (the power module is the external voltage mentioned above). The developing box 1 also includes a protective cover 151, which can cover the mounting recess 152 to protect the power module 56 and the transformer module 57.

[0108] like Fig.24 The figure shows the electrical connection between the power supply assembly and the developing roller and the powder feeding roller in the developing box. Fig. 22 and Fig.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.

[0109] like Fig.25 and Fig.26 The schematic diagram of the circuit connection mode of the developer box is shown in FIG. 5 . The power module 56 is combined with the second interface 571 through the first interface 561, so as to transmit the voltage to the transformer module 57, and the transmitted voltage is increased through the transformer coil 574. The increased voltage passes through the grounding resistor 521 to the third interface 572, and then is connected to the grounding circuit 52, and finally connected 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, so as to connect the developing roller 131 and / or the powder feeding roller 133, and power the developing roller 131 and / or the powder feeding roller 133, so that the developer box 1 can work.

[0110] 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 from the power module 56 to the transformer module 57 can be increased to reach the voltage required for the developing roller 131 and / or the powder feeding roller 133 to work, and it is ensured that it can be transmitted stably without fluctuations.

[0111] Furthermore, in this embodiment, the power module 56 may be a storage battery. In other embodiments, the power module 56 may be other components that can store and release electrical energy, which is not specifically limited herein.

[0112] 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. Furthermore, in this embodiment, the electronic components on the transformer module 57 are not fixed in number and type. Any module that can change the voltage transmitted by the power module 56 and output it stably is acceptable, and no specific restrictions are made here.

[0113] like Fig. 27 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. Fig.26 This is a schematic diagram of the transformer module. Please refer to Fig.26 and Fig. 27 (Variation of Embodiment 4), the transformer module 57 is provided with a magnetic induction component 578, and the developer box 1 is provided with a magnetic member 58 on the side of the protective cover 153 at the fifth end 15 close to the first end 11 of the developer box 1, and the magnetic induction component 578 and the magnetic member 58 are arranged correspondingly in the second direction. The magnetic induction component 578 can play the role of 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.

[0114] Specifically, if Fig.29 is a schematic diagram of the second end of the developing box, Fig.30 and Fig.31Schematic diagram of the circuit connection mode of the developing box, when the power module 56 transmits the voltage to the transformer module 57, and the developing box 1 is not installed on the device body 9, in order to protect the voltage on the power module 56 from being consumed in advance, the present 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 the magnetic sensing component 578 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, which is used to drive the detection part located at the second end. The rotating transfer gear 47 interferes with the magnetic sensing component 578 to receive the magnetic force on the magnetic component 58, that is, the magnetic sensing component 578 is closed, and the transformer module 57 is in a connected state, so that the voltage transmitted from the power 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 repeated here.

[0115] In other embodiments, the developing box 1 may not be provided with a detection component at the second end, and may also not be provided with a transfer gear 47. The power module 56 is provided 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 driving gear 43, so as to achieve the above-mentioned effect. The details will not be elaborated here.

[0116] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope 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