Developing box and drum assembly thereof

Abstract

The utility model 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, in particular to a developing cartridge and a drum assembly thereof. BACKGROUND

[0002] The developing cartridge is a widely used detachable part on an image forming device, and the developing cartridge can be installed on the drum assembly and can be detachably installed to the image forming device together with the drum assembly.

[0003] The non-driving side of the developing cartridge is also provided with an electrode, which 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 cartridge in the axial direction, the volume of the developing cartridge is increased, the cost of the developing cartridge is increased, and the installation process is affected. INNOVATION CONTENT

[0005] The present application provides a developing cartridge and a drum assembly thereof, which aims to change the position of the electrode and reduce the axial volume of the developing cartridge.

[0006] The present application provides a developing cartridge, which can be detachably installed to an image forming device together with a drum assembly, and the developing cartridge comprises:

[0007] A cartridge body has a first end and a second end arranged oppositely in a first direction, a third end and a fourth end arranged oppositely in a second direction, and a fifth end and a sixth end arranged oppositely in a third direction;

[0008] A developing roller is rotatable around a first axis extending in the first direction;

[0009] A power receiving portion is installed on the first end, and the power receiving portion is rotatable around a second axis extending in the first direction;

[0010] An electrode assembly is used to electrically connect the drum assembly and the developing roller, and in the first direction, the distance between the receiving portion of the electrode assembly for receiving the voltage on the drum assembly and the first end is less than the distance from the second end to the first end;

[0011] The electrode assembly comprises a grounding member, which is electrically connected to a grounding portion in the image forming device.

[0012] In a possible design, the grounding circuit with the electrode assembly further comprises a grounding resistor, and the grounding circuit is connected to the assembly circuit through the grounding resistor, so as to reduce the voltage transmitted by the electrode assembly of the assembly circuit.

[0013] 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.

[0014] In one possible design, the voltage stabilizing component is a voltage stabilizing diode.

[0015] In one possible design, 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 a grounding resistor.

[0016] In one possible design, the developing roller is connected in parallel with the voltage stabilizing component and the grounding resistor.

[0017] In one possible design, the drum assembly has a corona wire and a grid, and the corona wire and the grid are electrically connected to the image forming device.

[0018] In one possible design, the assembly circuit receiving portion is directly electrically connected to the grid to have a certain voltage.

[0019] In one possible design, the receiving portion is affected by the electric potential of the corona wire to have a voltage.

[0020] In one possible design, the receiving portion is a conductive member detachably arranged on the cartridge body, and the conductive member is a plate-shaped conductive material arranged at the fifth end.

[0021] In one possible design, the developing cartridge includes a powder outlet knife arranged in contact with the developing roller, and the receiving portion is the powder outlet knife.

[0022] In one possible design, the drum assembly further includes an external device portion made of a conductive material and electrically connected to the grid, and the receiving portion is directly electrically connected to the external device portion.

[0023] In one possible design, the drum assembly further includes a cleaning block capable of moving along the grid to clean the corona wire, and the external device portion does not interfere with the movement of the cleaning block.

[0024] In one possible design, the developing cartridge further includes a power module having a voltage by itself and a voltage adjusting module, and the power module and the voltage adjusting module are both mounted on the cartridge body.

[0025] The voltage adjusting module is a voltage boosting module for increasing the voltage output by the power module.

[0026] The drum assembly can be matched with the developing cartridge and electrically connected with the developing cartridge.

[0027] In a possible design, the drum assembly has a corona wire and a grid, and the corona wire and the grid can be electrically connected with the image forming device.

[0028] The drum assembly has a cleaning block, which can move back and forth along the grid to clean the corona wire.

[0029] The drum assembly further includes an external device part made of conductive material, which can be electrically connected with the grid and / or the corona wire and does not interfere with the movement of the cleaning block.

[0030] The developing cartridge can be electrically connected with the external device part.

[0031] In a possible design, the drum assembly further includes a drum driving part to receive a driving force of the image forming device, and in the extension direction of the grid, the distance from the external device part to the drum driving part is less than the distance from one end of the drum driving part to the other end.

[0032] In the embodiment, the electrode assembly is arranged on the developing cartridge, and then a part capable of receiving the potential of the corona wire of the drum assembly is arranged on the developing cartridge or the drum assembly to generate a voltage, so as to supply power to the developing roller and / or the powder feeding roller of the developing cartridge. Compared with the electrode protruding from the developing cartridge arranged on the side wall of the non-driving end of the developing cartridge in the axial direction, the volume of the developing cartridge is reduced, so that the manufacturing cost of the developing cartridge is reduced, and the mounting process of the developing cartridge is optimized.

[0033] It should be understood that the foregoing general description and the following detailed description are only exemplary and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a schematic diagram of the drum assembly in embodiment one;

[0035] Figure 2 is a schematic diagram of the developing cartridge in embodiment one;

[0036] Figure 3 is an exploded schematic diagram of the first end of the developing cartridge in embodiment one;

[0037] Figure 4 is a schematic diagram of the developing cartridge and the drum assembly in embodiment one Figure 1 ;

[0038] Figure 5 is a schematic diagram of the developing cartridge and the drum assembly in embodiment one Figure 2 ;

[0039] Figure 6 is a schematic view of the first end of the developer cartridge and drum assembly of Example One;

[0040] Figure 7 is a schematic view of the power supply assembly and the drum assembly of Example One;

[0041] Figure 8 is a schematic view of the developer cartridge and drum assembly of Example One in cooperation with an image forming device;

[0042] Figure 9 is a schematic view of another embodiment of the drum assembly of Example One;

[0043] Figure 10 is a schematic view of another embodiment of the drum assembly of Example One;

[0044] Figure 11 is a schematic view of a first circuit connection when the voltage is too large of Example One;

[0045] Figure 12 is a schematic view of a second circuit connection when the voltage is too large of Example One;

[0046] Figure 13 is a schematic view of a third circuit connection when the voltage is too large of Example One;

[0047] Figure 14 is a schematic view of the first end of the developer cartridge of Example Two;

[0048] Figure 15 is a schematic view of the power supply assembly and the developer cartridge of Example Two;

[0049] Figure 16 is a schematic view of the developer cartridge of Example Three;

[0050] Figure 17 is a schematic view of the first end of the developer cartridge of Example Three;

[0051] Figure 18 is a schematic view of the power supply assembly and the developer cartridge of Example Three; Figure 16

[0052] Figure 19 is a schematic view of the power supply assembly and the developer cartridge of Example Three;

[0053] Figure 20 is a schematic view of another power supply assembly of Example Three;

[0054] Figure 21 is a schematic view of another power supply assembly of Example Three;

[0055] Figure 22 ​is the first end perspective view of the developing cartridge in Example 4;

[0056] Figure 23 is the first end exploded view of the developing cartridge in Example 4;

[0057] Figure 24 is the perspective view of the power supply assembly and the developing cartridge in Example 4;

[0058] Figure 25 is the first circuit connection mode of the developing cartridge in Example 4;

[0059] Figure 26 is the second circuit connection mode of the developing cartridge in Example 4;

[0060] Figure 27 is the perspective view of the power supply assembly and the developing cartridge in the modification of Example 4;

[0061] Figure 28 is the perspective view of the voltage conversion module in the modification of Example 4;

[0062] Figure 29 is the second end exploded view of the developing cartridge in Example 4;

[0063] Figure 30 is the first circuit connection mode of the developing cartridge in the modification of Example 4;

[0064] Figure 31 is the second circuit connection mode of the developing cartridge in the modification of Example 4.

[0065] Reference Signs:

[0066] 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, external portion; 211, first guide rail; 212, first urging member; 213, first elastic member; 221, second guide rail; 222, second urging member;

[0067] 1, developing 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, cover; 16, sixth end; 111, first 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 blade; 133, powder feeding roller; 141, first pushing portion; 17, chip; 171, chip terminal; 18, chip holder; 40, power receiving portion; 41, developing gear; 42, powder feeding gear; 43, drive gear; 44, idler gear; 45, stirring gear; 47, transmission gear; 51, assembly circuit; 511, connection point; 512, voltage stabilizing 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, connection portion; 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, voltage conversion module; 571, second interface; 572, third interface; 573, fourth interface; 574, voltage conversion coil; 576, voltage stabilizing element; 577, capacitor; 578, magnetic sensing component; 58, magnetic component; 9, image forming apparatus; 91, grounding portion.

[0068] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application. DETAILED DESCRIPTION

[0069] For a better understanding of the technical solutions of the present application, the embodiments of the present application are described in detail below with reference to the drawings.

[0070] It should be clear that the described embodiments are only some 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 those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0071] The terms used in the embodiments of the present application are only for the purpose of describing the 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 the plural forms, unless the context clearly indicates otherwise.

[0072] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0073] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0074] This embodiment provides an image forming apparatus, which is a multifunctional image forming apparatus with functions such as printing, copying, scanning, and faxing. The apparatus includes a main body, a drum assembly, and a developing cartridge. The developing cartridge is detachably mounted on the drum assembly, and the two, after being installed on the drum assembly, are essentially a single integrated processing unit. The developing cartridge and drum assembly can be detachably mounted together on the main body. The developing cartridge is used to absorb developer, primarily toner. The drum assembly receives the developer provided by the developing cartridge, forms an electrostatic latent image, and displays the image on an imaging sheet (e.g., paper).

[0075] The following section will describe in detail, with reference to the accompanying drawings, the possible mating structures of the developing cartridge and drum assembly.

[0076] It should be noted that, with the drum assembly as the reference, 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, second, and third directions are set perpendicular to each other, and the development cassette and the drum assembly share the same direction reference.

[0077] like Figure 1 The diagram shows the structure of the drum assembly 2, which 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 between the right frame 21 and the left frame 22 for mounting the developing cartridge. The chip mounting hole 24 is used to avoid the chip on the developing cartridge, allowing the chip to be exposed on the outside of the drum assembly 2.

[0078] 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 cartridge 1 to be installed more conveniently on the drum assembly 2 during the process of installing the developing cartridge 1 onto the drum assembly 2.

[0079] 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 provided 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 in the drum assembly 2, the elastic member applies a pushing force to the developing cartridge in the second direction toward the photosensitive drum 25 through the pushing member.

[0080] A locking element 23 is also provided on the drum assembly 2 near the right frame. The locking element 23 includes a locking part 231 and a removal part 232. When the developing cartridge is installed in the drum assembly 2, the locking part 231 can cooperate with the developing cartridge to fix the developing cartridge 1 in the drum assembly 2 and 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 element 23 is pressed to make the removal part abut against the developing cartridge, so that the user can remove the developing cartridge 1 from the drum assembly 2.

[0081] like Figure 2 The diagram shows the structure of the developing cartridge 1, which includes a cartridge body 10, a transmission assembly, a first protective cover 111, and a conductive assembly.

[0082] The housing 10 has a first end 11 (driving end) and a second end 12 (non-driving end) oppositely arranged in a first direction, a third end 13 and a fourth end 14 oppositely arranged in a second direction, and a fifth end 15 and a sixth end 16 oppositely arranged in a third direction. A first cover 111 is detachably arranged at the first end 11 of the housing 10, and at least covers a portion of the transmission component and the conductive component to protect the transmission component.

[0083] like Figure 3 The diagram shown is an exploded view of a portion of the structure at the first end of the developing cartridge. The first cover 111 includes a first mounting hole 115, a first guide portion 112, and a locking portion 114. The first guide portion 112 is a cylindrical protrusion extending in a first direction away from the cartridge body 10. Please refer to the reference diagram. Figure 1 The first guide part 112 is used to cooperate with the first guide rail 211 on the drum assembly 2 during the installation of the developing cartridge 1 to the drum assembly 2. The locking part 114 is provided on the rear side of the first cover 111 in the second direction, and is used to engage with the locking part 231 on the drum assembly 2 when the developing cartridge 1 is installed in the drum assembly 2, so as to fix the developing cartridge 1 inside the drum assembly 2.

[0084] The structure of the drum assembly and the developing cartridge to realize the developing work will be described in detail below with reference to the drawings

[0085] 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 close to the photosensitive drum 25 in the second direction, and the grid 26 is located between the corona wire 27 and the photosensitive drum 25 in the third direction. The drum assembly 2 is also provided with a first connecting point 261 and a second connecting point 271 close to the photosensitive drum 25 on the left side of the drum assembly 2 in the first direction, the first connecting point 261 is electrically connected with the grid 26, and the second connecting point 271 is electrically connected with the corona wire 27. When the photosensitive drum 25 is installed in the device body 9, the first connecting point 261 is electrically connected with the device body 9 to supply power to the grid 26, and the second connecting point 271 is electrically connected with the device body 9 to supply power to the corona wire 27.

[0086] It should be noted that, in general, the voltage on the corona wire 27 is much higher than the voltage on the grid 26, and the voltage on the corona wire 27 is relatively unstable. The corona wire 27 can ionize the surrounding air, and the surface layer of the photosensitive drum 25 has an insulating film. After the corona wire 27 is powered on, it can attach electrons to the surface of the photosensitive drum 25. Specifically, after the corona wire 27 is powered on, it can ionize the air, and the ionized electrons can be attached to the photosensitive drum 25 through the grid 26. After the grid 26 is powered on, the electrons ionized by the corona wire 27 can be scattered when passing through the grid 26, and then uniformly attached to the photosensitive drum 25. That is, the grid 26 and the corona wire 27 together charge the photosensitive drum 25.

[0087] In addition, the corona wire 27 is equivalent to a divergent magnetic field. When the developing cartridge 1 and the drum assembly 2 are installed in the device body 9 and powered on, the voltage on the metal conductive part closer to the corona wire 27 is higher, and the voltage on the metal conductive part farther from the corona wire 27 is lower.

[0088] As shown in Figure 4 The developing cartridge and the drum assembly are assembled as shown in the schematic view. After the developing cartridge 1 is installed in the drum assembly 2, the developing cartridge 1 and the drum assembly 2 are equivalent to an integral whole, and the developing cartridge 1 and the drum assembly share the end face.

[0089] Please refer to Figure 1 and Figure 4At the photosensitive drum 25 of the drum assembly 2, the outer frame further has a track, and a cleaning block 28 is arranged on the track and can move left and right on the track in the first direction. The track is above the corona wire 27 in the third direction, and the cleaning block 28 is partially in contact with the corona wire 27 when the drum assembly 2 is installed. When the cleaning block 28 moves left and right in the first direction, the cleaning block 28 can clean the corona wire 27, preventing impurities from adhering to the corona wire 27 and affecting ionization.

[0090] Please continue to refer to Figure 2 The developing cartridge 1 is provided with a developing roller 131, a powder outlet knife 132, and a powder feeding roller (not shown in the figure) on the third end 13, and the developing roller 131, the powder outlet knife 132, and the powder feeding roller all extend in the first direction. The developing roller 131 and the powder feeding roller are supported at both ends in the first direction by the cartridge body 10 and can rotate relative to the cartridge 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 relative to the fourth end 14.

[0091] Please refer to Figure 1 and Figure 2 After the developing roller 131 is installed to the drum assembly 2, the developing roller 131 is in contact with the photosensitive drum 25 on the drum assembly 2, so that the developing roller 131 can transmit the developer transmitted by the powder feeding roller to the photosensitive drum 25. The powder outlet knife 132 extends in the first direction, and the powder outlet 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.

[0092] Please refer to Figure 2 and Figure 3 The fourth end 14 of the developing cartridge 1 in the second direction is provided with a pushing part. Specifically, a first force receiving member 141 is arranged close to the first end 11, and a second force receiving member (not shown in the figure) is arranged close to the second end 12. The first force receiving member 141 and the second force receiving member are in abutment with the first pushing member 212 and the second pushing member 222 of the drum assembly 2 in the state that the developing cartridge 1 is installed to the drum assembly 2, so as to receive the pushing force of the pushing member in the second direction towards the photosensitive drum 25, so that the developing roller 131 on the developing cartridge 1 can be tightly attached to the photosensitive drum 25.

[0093] The first force receiving member 141 and the second force receiving member protrude away from the developing roller 131 in the second direction, and the pushing member can be a U-shaped or C-shaped or V-shaped protrusion, which can be specifically set according to actual conditions, and is not limited in the embodiment.

[0094] It should be noted that the powder outlet knife in the embodiment is a steel knife, and the knife holder of the powder outlet knife 132 is substantially L-shaped as viewed from the first direction, and includes a blade in contact with the developing roller 131 and a holder fixed to the cartridge body 10. In the embodiment, the part of the powder outlet knife 132 in contact with the cartridge body 10 is of metal material, and the part in contact with the developing roller 131 is of insulating material. In some embodiments, the powder outlet knife 132 can be of other materials, for example, the holder of the powder outlet knife 132 in contact with the cartridge body and the blade in contact with the developing roller 131 are both of metal material. The specific configuration can be set according to the actual situation, which is not limited in the embodiment.

[0095] The transmission assembly is arranged at the first end 11 of the cartridge body 10, and includes a driving part rotatably mounted on the first end 11 of the cartridge 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 and integrally formed, and the driving gear 43 is closer to the first end 11 of the cartridge body 10 than the power receiving part 40 in the first direction. The first cover 111 of the first end 11 of the cartridge body 10 is provided with a driving protection part extending in the first direction, and the middle of the driving protection part is a first mounting hole 115 penetrating the first 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 gears on the transmission assembly.

[0096] The transmission assembly further includes the driving gear 43, the developing gear 41, the powder feeding gear 42, the idler gear 44, and the stirring gear 45. The developing gear 41 receives the power transmitted by the driving gear 43 and drives the shaft of the developing roller 131 to rotate together. The powder feeding gear 42 is coaxially and 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 and fixedly mounted on one end of the stirring holder and rotates together with the stirring holder. The idler gear 44 is engaged with the driving gear 43 and the stirring gear 45 at the same time, so as to transmit the driving force to the stirring gear. At the same time, the driving gear 43 is engaged 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 rollers in the developing cartridge to work, and transmit the developer to the photosensitive drum 25, so that the photosensitive drum 25 completes the imaging work.

[0097] The developing cartridge 1 is further provided with a powder filling port 113 at the first end 11, which is used to fill powder into the inside of the cartridge body 10 of the developing cartridge 1. The powder filling port 113 also has a cover at the port, which is used to seal the powder filling port 113 after the powder filling is completed, so as to prevent the toner from leaking to the outside of the cartridge body 10 through the powder filling port 113.

[0098] Figure 5As shown in the schematic view of the assembled developing cartridge and drum assembly, the developing cartridge 1 further comprises a chip 17 and a chip terminal 171 detachably mounted on the chip 17. The chip 17 is provided with a buckle, and the chip 17 is detachably mounted on the first cover 111 through the buckle. The chip 17 is used to store the relevant information of the developing cartridge 1, and transmit the relevant information of the developing cartridge 1 to the image forming device in the state that the developing cartridge 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 can realize electrical connection with the chip 17 through an intermediate piece. 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.

[0099] As known, the existing chip 17 is mostly provided with a plurality of chip terminals 171. Specifically, the number of chip terminals 171 is the same as the number of stylus on the image forming device. As known, no matter how many chip terminals 171 are set, there is always one chip terminal 171 that is a grounding terminal, which is used to form a loop for grounding when the chip 17 is electrically connected with the image forming device. In the state that the developing cartridge 1 is installed to the drum assembly 2, the chip 17 is exposed through the chip mounting hole 24 on the drum assembly 2 to contact with the image forming device.

[0100] In some embodiments, the developing cartridge further comprises an electrode assembly electrically connecting an external voltage and the developing roller and / or the powder feeding roller, so as to realize power supply for the developing roller and / or the powder feeding roller. The electrode assembly is arranged in the area of the developing cartridge except the driving end, so as to reduce the axial volume of the developing cartridge, thereby reducing the manufacturing cost of the developing cartridge and optimizing the developing 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 voltage of the power supply self-provided on the developing cartridge.

[0101] Further, in other embodiments, the electrode assembly electrically connects the external voltage and the developing roller body or electrically connects the external voltage and the developing roller shaft, and whether the developing roller body is insulated from the developing roller shaft or not, it is all the voltage provided for the developing roller in the following description.

[0102] The possible structures for realizing power supply for the developing roller and the powder feeding roller in the developing cartridge will be described in detail below in combination with the drawings.

[0103] Embodiment One

[0104] As Figure 6Figure 1 shows the structure of the first end of the developing cartridge and the drum assembly after assembly. The developing cartridge 1 also includes a conductive assembly (corresponding to the electrode assembly described above) for conducting electricity to the developing roller 131 and the powder feeding roller 133. The conductive assembly includes an assembly circuit 51, a grounding circuit 52, and a power supply circuit 53. The assembly circuit 51 is fixed to the developing cartridge 1 by a nut. The grounding circuit 52 and the power supply circuit 53 are connected in parallel to the assembly circuit 51. The connection point of the parallel connection is H.

[0105] Specifically, as shown in Figure 2, the receiving part of the conductive assembly for receiving an external voltage is closer to the first end 11 than to the second end 12 in the first direction. Figure 7 Figure 3 shows the electrical connection between the power supply assembly and the developing roller and the powder feeding roller in the developing cartridge. The receiving part of the conductive assembly for receiving an external voltage is closer to the first end 11 than to the second end 12 in the first direction. 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. The point of contact is closer to the first end 11 than to the second end 12 in the first direction. 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 voltage through the connection point 511, the voltage is transmitted to the grounding circuit 52 and the power supply circuit 53 in parallel through the voltage stabilizing diode 512. In this embodiment, the voltage stabilizing diode 512 prevents voltage breakdown of the assembly circuit 51 / grounding circuit 52 / power supply circuit 53 when the voltage at each node of the circuit is unstable due to electricity or other reasons, thereby preventing damage to the circuit. In other embodiments, the voltage stabilizing component can be other electronic components or circuits as long as it can stabilize the voltage.

[0106] As shown in Figure 4, the receiving part of the conductive assembly for receiving an external voltage is closer to the first end 11 than to the second end 12 in the first direction. Figure 8 Figure 5 shows the developing cartridge and the drum assembly installed in the device body. The grounding circuit 52 is provided with a grounding resistor 521 and a grounding point 522 (corresponding to the grounding member described above). The grounding point 522 of the grounding circuit 52 on the developing cartridge 1 is used to connect with the grounding part 91 of the device body 9 to complete grounding. Specifically, the voltage of the grounding circuit 52 is first transmitted through the grounding resistor 521 and then through the grounding point 522 to contact the grounding part 91 on the device body 9 to complete grounding. The purpose of the grounding resistor 521 in this embodiment is to prevent voltage imbalance between the grounding circuit 52 and the power supply circuit 53 when the voltage is too high.

[0107] In other embodiments, the grounding circuit 52 can also be connected to the grounding terminal in the chip terminal 171 on the chip 17 to complete grounding.

[0108] The first power supply point 531 and the second power supply point 532 are arranged on the power supply circuit 53. 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 the powder feeding roller 133 through the second power supply point 532.

[0109] Specifically, in the embodiment, the first power supply point 531 and the second power supply point 532 are arranged at the first end of the developing cartridge 1 in the first direction, i.e. the end with the driving assembly. The first power supply point 531 is used to supply power to the developing roller 131, and the second power supply point 532 is used to supply power to the powder feeding roller 133. The first power supply point 531 and the second power supply point 532 function as electrodes.

[0110] The second power supply point 532 can be directly connected to the first power supply point 531, i.e. the first power supply point 531 and the second power supply point 532 are integrally formed. When the power supply circuit 53 is connected, the first power supply point 531 and the second power supply point 532 are connected in series.

[0111] Alternatively, in other embodiments, the second power supply point 532 and the first power supply point 531 can be separately arranged. The second power supply point 532 can be connected to any circuit at any location, and can be adapted to different circuits. For example, the developing roller 131 and the powder feeding roller 133 are connected in parallel, or the circuit is connected only to the powder feeding roller 133 or only to the developing roller 131, etc., which are not limited herein.

[0112] Alternatively, in other embodiments, the first power supply point 531 and the second power supply point 532 can not be arranged, and can be directly connected to the developing roller shaft and the powder feeding roller shaft, or can be connected to the rubber layer outside the developing roller 131. The specific arrangement can be determined according to the actual situation, which is not limited in the embodiment.

[0113] Specifically, after the developing cartridge 1 and the drum assembly 2 are installed 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 for the grid 26 and the corona wire 27. The grid 26 has voltage (at this time, the grid is the external voltage described above). The assembly circuit 51 is connected to the grid 26 through the connection point 511. The voltage is stabilized by the voltage stabilizing diode 512 on the assembly circuit 51, and then transmitted to the power supply circuit 53 and the grounding circuit 52. The voltage of the grounding circuit 52 is connected to the grounding part 91 through the grounding resistor 521 to complete grounding. 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 the powder feeding roller 133 through the second power supply point 532, thereby completing the attachment of the carbon powder to the photosensitive drum 25.

[0114] Further, as shown in FIG. 4, the first power supply point 531 and the second power supply point 532 are arranged on the power supply circuit 53. Figure 9-10As shown, in other embodiments, the drum assembly 2 further comprises an external device 29, which is detachably fixed on the drum assembly 2, is made of conductive material, such as conductive resin, metal piece, etc., and is electrically connected with the grid 26 and / or the corona wire 27. The assembly circuit 51 is directly electrically connected with the external device 29 through the connecting point 511, thereby receiving 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 device 29 does not interfere with the movement of the cleaning block 28. The drum assembly 2 further comprises a drum driving part, which is located at the first end, receives the driving force of the image forming device, and drives the photosensitive drum 25. In the first direction (the extension direction of the grid), the distance between the external device 29 and the drum driving part is less than the distance between the first end and the second end of the drum assembly 2, i.e., the distance between the external device 29 and the drum driving part is less than the distance between the end of the drum assembly 2 having the drum driving part and the other end.

[0115] Further, the voltage carried by the corona wire 27 and the grid 26 is affected by the voltage provided by the device body 9. Since different image forming devices provide different voltages, the voltage carried by the corona wire 27 and the grid 26 is also different. In most cases, the voltage carried by the corona wire 27 is greater than the voltage carried by the grid 26.

[0116] In the present embodiment, the grid 26 supplies power to the developing roller 131 and the powder feeding roller 133. Since the grid 26 and the connecting point 511 are close to the corona wire 27 in the present embodiment, they are affected by the electric potential. Therefore, the voltage entering the assembly circuit 26 is too large and has fluctuations. Therefore, a voltage stabilizing diode 512 is needed to stabilize the voltage, and a grounding resistor 521 is needed to be arranged on the grounding circuit 52 to balance the voltage on the power supply circuit 53.

[0117] Since different developing cartridges 1 and drum assemblies 2 are installed in different image forming devices 9, the voltage entering the assembly circuit 51 is also different. Therefore, different circuits need to be arranged according to the voltage provided by the grid 26. The functions of the circuit in the present embodiment will be described below.

[0118] As shown in Figures 11 to 13 When the voltage is too large, the circuit connection diagram is shown. Since the voltage provided by the grid 26 is too large, a voltage stabilizing diode 512 is added to the assembly circuit 51 to prevent the circuit from being broken and to ensure stable transmission of the voltage. At the same time, in order to ensure the completeness of the circuit loop, a grounding circuit 52 is needed to be arranged, and a grounding resistor 521 is needed to be arranged on the grounding circuit 52 to balance the voltage on the grounding circuit 52 and the power supply circuit 53.

[0119] The difference is that please refer to Figure 11When 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 Figure 10 When the grid 26 provides the voltage, only the developing roller 131 or the powder feeding roller 133 is connected to the grounding circuit 52 in parallel. Alternatively, please refer to Figure 13 When the grid 26 provides the voltage, the powder feeding roller 133 is connected to the assembly circuit 51 in parallel in front of the voltage stabilizing diode 512, that is, the powder feeding roller 133 is connected to the voltage stabilizing diode 512 in parallel, and the developing roller 131 is connected to the grounding circuit 52 in parallel. The specific circuit connection mode can be set according to the actual situation, which is not limited in the embodiment.

[0120] When the voltage is large, that is, the voltage provided by the grid 26 is large, the voltage stabilizing diode 512 still needs to be added to the assembly circuit 51 to prevent circuit breakdown and ensure stable voltage transmission, but the grounding circuit 52 can not be set under the voltage, that is, the power supply circuit 53 is connected to the assembly circuit 51 in series.

[0121] The difference is that, when the grid 26 provides the voltage, the developing roller 131 and the powder feeding roller 133 can be connected to each other in parallel and then connected to the grid 26 in series through the voltage stabilizing diode 512. When the grid 26 provides the voltage, that is, the developing roller 131 and / or the powder feeding roller 133 is connected to the grid 26 in series through the voltage stabilizing diode 512. When the grid 26 provides the voltage, the powder feeding roller 133 is connected to the assembly circuit 51 in parallel in front of the voltage stabilizing diode 512, that is, the powder feeding roller 133 is connected to the voltage stabilizing diode 512 in parallel, and the developing roller 131 is connected to the voltage stabilizing diode 512 in series and then connected to the powder feeding roller 133 in parallel. The specific circuit connection mode can be set according to the actual situation, which is not limited in the embodiment.

[0122] When the voltage is slightly large, that is, the voltage provided by the grid 26 is slightly large and cannot cause circuit breakdown, the voltage stabilizing diode 512 can not be set on the assembly circuit 51, but the grounding circuit 52 still needs to be set and connected to the grid 26 in parallel with the power supply circuit 53. In the case where the grid 26 provides the voltage, the grounding circuit 52 needs to be provided with the grounding resistor 521.

[0123] 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 to the grounding circuit 52 in parallel and then connected to the grid 26. Alternatively, when the grid 26 provides the voltage, the developing roller 131 can be connected to the powder feeding roller 133 in parallel first and then connected to the grounding circuit 52 in parallel and then connected to the grid 26. The specific circuit connection mode can be set according to the actual situation, which is not limited in the embodiment.

[0124] When the voltage is appropriate, 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 the circuit is not broken and runs smoothly, the assembly circuit 51 does not need the voltage stabilizing diode 512 and the grounding circuit 52.

[0125] The difference is that, under the voltage provided by the grid 26, the developing roller 131 and / or the powder feeding roller 133 can be directly connected in series with the grid 26. Alternatively, under the voltage provided by the grid 26, 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 the present embodiment, the voltage is appropriate, which specifically means that the voltage provided by the grid 26 is the same as the voltage required by the developing roller 131 and / or the powder feeding roller 133 to work normally. The specific circuit connection mode can be set according to the actual situation, which is not limited in the present embodiment.

[0126] 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.

[0127] The above-described various circuit connection modes are only several better circuit change modes proposed according to different voltages when the voltage on the grid 26 changes. For other voltage stabilizing components and other circuit connection modes, as long as the voltage can be stabilized and transmitted to the developing roller 131 and / or the powder feeding roller 133 through the grid 26, they are not specifically limited here.

[0128] Embodiment Two

[0129] In the present embodiment, the difference compared with embodiment one is that the connection point 511 of the assembly circuit 51 is not connected with the grid 26, but is connected with the powder outlet blade 132, and the rest of the corresponding structure and the corresponding power supply mode are the same as those of embodiment one.

[0130] For details, please refer to Figure 14 and Figure 15 , Figure 14 is a schematic view of the first end of the developing cartridge in another embodiment, Figure 15 as shown in Figure 14The schematic view of the power supply assembly cooperating with the developing roller, the powder feeding roller and the powder outlet knife in the developing cartridge. The powder outlet knife 132 is located at the third end 13 of the developing cartridge 1 in the second direction and extends along the first direction. The powder outlet knife 132 can contact 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, preventing the powder feeding roller 133 from feeding the toner layer with uneven thickness on the developing roller 131, resulting in color changes in the image during imaging, affecting the imaging quality. The powder outlet knife 132 includes a knife holder and a blade, and the knife holder is fixed on the cartridge body 10. In this embodiment, the knife holder is made of a metal conductive material, and the connection point 511 of the assembly circuit 51 is fixed on the cartridge body 10 together with the knife holder of the powder outlet knife 132 by a screw.

[0131] In this embodiment, when the developing cartridge 1 is installed in the device body 9 together with the drum assembly 2, the grid 26 and the corona wire 27 are electrically connected to the device body 9 and have a voltage. At this time, since the powder outlet knife 132 is close to the corona wire, under the action of the potential of the corona wire 27, the metal conductive knife holder of the powder outlet knife 132 (the powder outlet knife 132 is equivalent to a conductive part, i.e. in this embodiment, the receiving part is the powder outlet knife) also has a voltage, and the voltage difference with the voltage on the grid 26 is not large. The connection point 511 on the assembly circuit 51 is connected with the knife holder of the powder outlet knife 132, and the voltage is transmitted to the power supply circuit 53 and the grounding circuit 52 after passing through the voltage stabilizing diode 512 on the assembly circuit 51. The voltage passing through the grounding circuit 52 is connected to the grounding part 91 through the grounding resistor 521 to complete grounding, and the voltage passing through the power supply circuit 53 is supplied to the developing roller 131 and the powder feeding roller 133 through the first power supply point 531 and the second power supply point 532 respectively, realizing that the knife holder has voltage by inducting the potential of the corona wire 27, and then supplying power to the developing roller 131 and / or 133, thereby completing the attachment of toner to the photosensitive drum 25.

[0132] Compared with embodiment one, this embodiment is equivalent to using the powder outlet knife 132 to replace the grid 26 to deliver voltage to the assembly circuit 51, the grounding circuit 52 and the power supply circuit 53, and to complete 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 embodiment one, and will not be described in detail here.

[0133] Need to explain, because the corona wire 27 power, need to ionize air, so the voltage on the corona wire 27 is very big, the corona wire 27 equivalent to divergent magnetic field, the closer to the corona wire 27 metal conductive parts on the voltage is bigger. Therefore, the powder outlet knife 132 close to the corona wire 27 set, is able to be affected by the voltage on the corona wire 27 and have a certain voltage (similar to the principle of wireless charging). The powder outlet knife 132 and the developing roller 131 are connected, the powder outlet knife 132 with voltage for the developing roller 131 power supply, ionizing the developer on the developing roller 131, the developing roller 131 and the photosensitive drum is in contact, with a certain electronic developer attached to the photosensitive drum with a certain electron, and then complete the development, namely equivalent to the developing box electrode in this embodiment, is arranged at the third end 13.

[0134] In this embodiment, the voltage of the powder outlet knife 132 is similar to that of the grid 26, and the voltage on the powder outlet knife 132 will also change due to image forming equipment and other reasons. Different circuit implementations will be used according to the different voltages on the powder outlet knife 132. These different circuit implementations are completely the same as those in embodiment one, and will not be described in detail here.

[0135] Further, the holder on the powder outlet knife 132 can be made of other conductive materials that can be affected by the electric field and have voltage, in addition to being made of metal conductive materials. Metal conductive materials are the preferred embodiment in this embodiment. The specific settings can be made according to the actual situation, which is not limited in this embodiment.

[0136] Further, in this embodiment, the powder outlet knife 132 is arranged at the third end 13 of the box body 10. In the first direction, the distance from the powder outlet knife 132 to the first end 11 is less than the distance from the first end 11 to the second end 12, that is, the distance from the center of the powder outlet knife 1323 to the first end 11 is less 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 outlet knife 132 respectively extend out of the first end 11 and the second end 12 of the box body 10, as long as the extension distance is not too long, it can be considered to meet the above distance ratio requirements.

[0137] Embodiment three

[0138] In this embodiment, compared with embodiment two, the difference is that the developing box 1 is provided with a conductive piece capable of receiving the voltage of the corona wire 27, that is, the conductive piece is a receiving part. In this embodiment, the conductive piece is a conductive piece 54, and the connection point 511 of the assembly circuit 51 is connected with the conductive piece 54. The rest of the circuit elements and the circuit connection are the same as those in embodiment two.

[0139] Figure 16As shown in the schematic view of the developing cartridge in another embodiment, an electrically conductive sheet 54 is provided on the fifth end 15 of the developing cartridge 1, which receives the potential of the corona wire 27 and forms a voltage, and the assembly circuit 51 is connected with the electrically 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.

[0140] In the embodiment, the electrically conductive sheet 54 is fixed on the developing cartridge 1 by screws, and in other embodiments, the electrically conductive sheet 54 can be fixed on the developing cartridge 1 by clamping, gluing and the like. The specific setting can be determined according to the actual situation, which is not limited in the embodiment.

[0141] It should be noted that the voltage on the corona wire 27 is very large (the corona wire is the external voltage in the above) because the corona wire 27 needs to ionize the air. The electrically conductive sheet 54 provided near the developing roller of the developing cartridge (the electrically conductive sheet and the power supply assembly are the electrode assembly in the above, and the electrically conductive sheet is equivalent to the receiving part) can be affected by the voltage on the corona wire 27 to have a certain voltage (similar to the principle of wireless charging). The electrically conductive sheet 54 is connected with the developing roller 131, the electrically conductive sheet 54 with voltage supplies power to the developing roller 131, ionizes the developer on the developing roller 131, the developing roller 131 is in contact with the photosensitive drum, the developer with a certain electron is attached to the photosensitive drum with a certain electron, and then the developing is completed.

[0142] Figure 17 As shown in the structural schematic view of the first end of the developing cartridge in another embodiment, the developing cartridge 1 further comprises a chip rack 18 provided on the first cover 111 of the developing cartridge 1, and the chip 17 and the chip terminal 171 are provided on the chip rack 18. In the second direction, the chip terminal 171 is farther away from the developing roller 131 than the power receiving part 40.

[0143] As Figures 18 to 20 When the developing cartridge 1 is installed in the equipment body 9 together with the drum assembly 2, the grid 26 and the corona wire 27 are electrically connected with the equipment body 9 and have a voltage. At this time, under the action of the potential of the corona wire 27, the electrically conductive sheet 54 also has a voltage, the connecting point 511 on the assembly circuit 51 is connected with the electrically conductive sheet 54, the voltage is transmitted to the power supply circuit 53 and the grounding circuit through the voltage stabilizing diode 512 on the assembly circuit 51, the voltage through the grounding circuit 52 is connected with the grounding part 91 through the grounding resistor 521 to complete the grounding, and the voltage through the power supply circuit 53 is supplied to the developing roller 131 and the powder feeding roller 133 through the first power supply point 531 and the second power supply point 532 respectively, so as to realize the power supply to the developing roller 131 and / or the powder feeding roller 133 through the electrically conductive sheet 54, and thus complete the attachment of the toner to the photosensitive drum 25.

[0144] It should be noted that when the developing cartridge 1 is installed in the drum assembly 2, there is no contact between the electrically conductive sheet 54 and the drum assembly 2

[0145] Compared with the second embodiment, the present embodiment is equivalent to using the conductive sheet 54 to replace the powder outletting knife 132 to deliver voltage to the assembly circuit 51, the grounding circuit 52 and the power supply circuit 53, and to complete 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 described in detail here.

[0146] Further, the distance between the conductive sheet 54 and the corona wire 27 and the size of the conductive sheet 54 can affect the voltage formed by the conductive sheet 54 receiving the potential of the corona wire 27. The farther the distance between the conductive sheet 54 and the corona wire 27, the smaller the voltage formed on the conductive sheet 54. Alternatively, the smaller the area of the conductive sheet 54, the smaller the voltage formed on the conductive sheet 54. That is, when the area of the conductive sheet 54 is constant, the voltage 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 is constant, the voltage is related to the size of the area of the conductive sheet 54.

[0147] In the present embodiment, the conductive sheet 54 is fixed in position and is arranged between the chip terminal 171 and the power receiving portion 40 in the second direction, and the length of the conductive sheet 54 in the first direction is about half the length of the developing cartridge 1. In other embodiments, the conductive sheet 54 can be as long as the developing cartridge 1 or occupy one-third of the total length of the developing cartridge 1, etc. The length of the conductive sheet 54 is different, and the area is also different, and the voltage provided to the developing roller 131 and / or the powder feeding roller 133 is also different. The conductive sheet 54 can also be arranged at other positions, and the size of the area can also be different. The specific arrangement can be set according to the actual situation, and the present embodiment is not limited here.

[0148] In the present embodiment, the conductive sheet 54 can be integrally formed with the assembly circuit 51 or can be arranged in a split type. When the conductive sheet 54 is fixed in position after being installed on the developing cartridge 1, the voltage on the conductive sheet 54 is determined by the area of the conductive sheet 54. Different developing cartridges 1 require different voltages to supply power to the developing roller 131 and / or the powder feeding roller 133. Different areas of the conductive sheet 54 can be manufactured in advance according to different products. Compared with the first and second embodiments, the size of the voltage provided to the developing cartridge 1 can be controlled, and the subsequent steps are simplified.

[0149] In the present embodiment, the voltage on the conductive sheet 54 is similar to the voltage of the powder outletting knife 132. Due to reasons such as image forming equipment, the voltage on the conductive sheet 54 will also change. Different circuit embodiments can be used according to different voltages on the conductive sheet 54. These different circuit embodiments are exactly the same as those of the second embodiment, and will not be described in detail here.

[0150] The present embodiment also provides a new power supply assembly and a contact power supply method of the developing roller 131 and the powder feeding roller 133. For details, please continue to refer to Figure 19 andFigure 20 The developing cartridge includes a bearing 116, which has a slot 1161. The first supply point 531 and the second supply point 532 are both bushing structures, correspondingly sleeved on the developing roller shaft and the powder feeding roller shaft, and located between the bearing 116 and the first end 11 of the developing cartridge 1. The developing roller 131 and the powder feeding roller 133 are rotatable relative to the first power supply point 531 and the second power supply point 532. The first power supply point 531 has a connecting part 533, which cooperates with the slotted part 1161. The power supply circuit 53 is connected to the connecting part 533 through the slotted part 1161 to provide voltage to the developing roller 131 and / or the powder feeding roller 133.

[0151] Compared to Embodiment 1, this implementation only changes the connection method between the power supply circuit 53 and the developing roller 131 and the powder feeding roller 133, without changing the location where the power supply circuit 53 provides voltage to the powder feeding roller 133 and / or the developing roller 131. The connection method in this embodiment saves more space in the developing cartridge 1 than in Embodiment 1, and is also more stable. Other connection methods are also possible in other embodiments, without too many restrictions.

[0152] like Figure 21 The diagram shown is a schematic of the power supply assembly 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 regulator 551 (equivalent to a Zener diode 512) and a power dissipation 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 the voltage-providing element (such as the grid 26 or the conductive sheet 54). 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. The third port 555 is connected to the grounding part 91 on the device body 9. By providing such a power supply module 55, the number of power supply components can be effectively simplified.

[0153] By connecting a power supply component to the developing cartridge, and then using a component on the developing cartridge that receives the potential of the corona wire on the drum assembly to generate voltage, the developing roller and / or powder feed roller of the developing cartridge are powered. This reduces the size of the developing cartridge compared to having electrodes protruding from the developing cartridge on the axial non-drive sidewall. Furthermore, the electrical components used in the power supply component are not installed in the image forming equipment, avoiding excessive contact with the equipment. Additionally, the electrical components have a long service life, enhancing the ease of subsequent recycling after using this power supply component, allowing for multiple reuses, making it more environmentally friendly and cost-effective.

[0154] Example 4

[0155] The difference between the embodiment and the embodiment one is that the embodiment has a power module 56, and the transformer module 57 connected with the power module 56 in the embodiment is also different from that in the embodiment one. Except for the above, the rest of the structure is the same as that in the embodiment one.

[0156] Figure 22 The schematic view of the first end of the developing cartridge in another embodiment, Figure 23 The schematic view of the second end of the developing cartridge, Figure 22 The exploded schematic view of part of the structure, please refer to Figure 22 and Figure 23 The fifth end 15 of the developing cartridge 1 has a mounting recess 152, in which the power module 56 and the transformer module 57 are mounted (at this time, the power module is the external voltage mentioned above). The developing cartridge 1 further comprises a protective cover 151, which can be covered on the mounting recess 152 to protect the power module 56 and the transformer module 57.

[0157] As Figure 24 The schematic view of the power supply assembly and the electric connection of the developing roller and the powder feeding roller in the developing cartridge, please refer to Figure 22 and Figure 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 with the second interface 571 of the transformer module 57 to transmit voltage to the transformer module 57. The third interface 572 of the transformer module 57 is connected with the grounding circuit 52, and the fourth interface 573 is connected with the power supply circuit 53.

[0158] As Figure 25 and Figure 26 The schematic view of the circuit connection mode of the developing cartridge. The power module 56 is combined with the second interface 571 through the first interface 561 to transmit voltage to the transformer module 57. The transmitted voltage is increased through the transformer coil 574. The increased voltage is transmitted to the third interface 572 through the grounding resistor 521, and then connected with the grounding circuit 52, and finally connected with the grounding part 91 to complete grounding. In addition, the increased voltage is transmitted to the power supply circuit 53 through the fourth interface 573 to connect with 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, so that the developing cartridge 1 can work.

[0159] The power module 56 transmits voltage to the voltage transformation module 57, and under the action of the voltage transformation coil 574, the voltage stabilization element 576, the capacitor 577 and other components, the voltage transmitted by the power module 56 to the voltage transformation module 57 can be increased to the voltage required by the developing roller 131 and / or the powder feeding roller 133 when working, and ensure that it can be stably transmitted without fluctuation.

[0160] Further, in the present embodiment, the power module 56 can be a storage battery. In other embodiments, the power module 56 can be other components capable of storing and releasing electric energy, which are not limited in detail herein.

[0161] Further, in the present embodiment, the voltage stabilization element 576 on the voltage transformation module 57 is a voltage stabilization diode. In other embodiments, it can be other voltage stabilization elements, which are not limited in detail herein.

[0162] Further, in the present embodiment, the electronic components on the voltage transformation module 57 are not fixed in number and type, and any module that can change the voltage transmitted by the power module 56 and make it stable output is acceptable, which is not limited in detail herein.

[0163] As shown in Figure 27 is a schematic view of the power supply assembly and the electric connection of the developing roller and the powder feeding roller in the developing cartridge, Figure 26 is a schematic view of the voltage transformation module, please refer to Figure 26 and Figure 27 In the fourth embodiment, the voltage transformation module 57 is provided with a magnetic sensing component 578, and the developing cartridge 1 is provided with a magnetic member 58 on the cover 153 of the fifth end 15 close to the first end 11 of the developing cartridge 1. The magnetic sensing component 578 and the magnetic member 58 are arranged in correspondence in the second direction. The magnetic sensing component 578 can function as a switch, that is, when the magnetic sensing component 578 senses the magnetic force of the magnetic member 58, it is equivalent to the off state, and when the magnetic sensing component 578 does not sense the magnetic force of the magnetic member 58, it is equivalent to the on state.

[0164] Specifically, as shown in Figure 29 is a schematic view of the second end of the developing cartridge, Figure 30 and Figure 31As a schematic diagram of the circuit connection mode of the developing cartridge, when the power module 56 transmits voltage to the voltage conversion module 57 and the developing cartridge 1 is not installed in the device body 9, in order to protect the voltage on the power module 56 from being consumed in advance, the embodiment is provided with a magnetic sensing component 578 on the voltage conversion module 57. At this time, the magnetic sensing component 578 is 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 an open state, which is equivalent to that the power module 56 is in an unused state. When the developing cartridge 1 is installed in the device body 9 and starts to start, the power receiving portion 40 receives driving force, so as to drive the transmission gear 47 to rotate, and the transmission gear 47 transmits the driving force to the second end 12 for driving the detection member located at the second end. The rotating transmission gear 47 interferes with the magnetic sensing component 578 to receive the magnetic force on the magnetic member 58, that is, the magnetic sensing component 578 is closed, the voltage conversion module 57 is in a connected state, so that the voltage transmitted by the power module 56 to the voltage conversion module 57 can be transmitted out, and the specific process is completely the same as that of the fourth embodiment, which will not be described in detail here.

[0165] In other embodiments, the developing cartridge 1 can not be provided with a detection member at the second end, and also can not be provided with a transmission gear 47. The power module 56 is arranged at the first end, and the magnetic sensing component 578 can interfere with the magnetic force on the magnetic member 58 through the driving gear 43 and the like, so as to achieve the above-mentioned effect, which will not be described in detail here.

[0166] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement and the like 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 together in an image forming apparatus, characterized in that, The developing cartridge includes: The box body has a first end and a second end that are arranged opposite to each other in a first direction, a third end and a fourth end that are arranged opposite to each other in a second direction, and a fifth end and a sixth end that are arranged opposite to each other in a third direction. The developing roller is capable of rotating about a first axis extending in a first direction; A power receiving unit is installed at the first end, and the power receiving unit is rotatable about a second axis extending along a first direction; An electrode assembly for electrically connecting the drum assembly and the developing roller, wherein, in a first direction, the distance between the receiving portion of the electrode assembly for receiving voltage on the drum assembly and the first end is less than the distance from the second end to the first end; The electrode assembly includes a grounding element that is 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 also includes a grounding resistor to reduce the voltage transmitted by the electrode assembly.

3. The developing cartridge according to claim 1, characterized in that, The electrode assembly has a voltage regulator to stabilize the voltage transmitted by the electrode assembly.

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

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

6. The developing cartridge according to claim 5, characterized in that, The developing roller is connected in parallel with the grounding resistor 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, which are electrically connected to the image forming device.

8. The developing cartridge according to claim 7, characterized in that, The receiving unit is directly electrically connected to the grille.

9. The developing cartridge according to claim 7, characterized in that, The receiving part can be affected by the potential of the corona wire to have a voltage.

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

11. The developing cartridge according to claim 9, characterized in that, The developing cartridge includes a powder dispensing blade, which is disposed in contact with the developing roller, and the receiving part is the powder dispensing blade.

12. The developing cartridge according to claim 7, characterized in that, The drum assembly also includes a peripheral unit made of conductive material, which is electrically connected to the grille, and the receiving unit is directly electrically connected to the peripheral unit.

13. The developing cartridge according to claim 12, characterized in that, The drum assembly also includes a cleaning block that 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, characterized in that, The developing cartridge also includes a power supply module with its own voltage and a transformer module for adjusting the voltage, both of which are installed in the cartridge body; The transformer module is a boost module, used to increase the voltage output by the power supply module.

15. A drum assembly, characterized in that, The drum assembly is capable of cooperating with and being electrically connected to the developing cartridge according to any one of claims 1-14.

16. The drum assembly according to claim 15, characterized in that, The drum assembly has a corona wire and a grid, which are electrically connected to an 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 also includes an external part made of conductive material, which can be electrically connected to the grid and / or the corona wire without interfering with the movement of the cleaning block; The developing cartridge can be electrically connected to the peripheral unit.

17. The drum assembly according to claim 16, characterized in that, The drum assembly further includes a drum drive unit for receiving the driving force of the image forming apparatus, wherein, in the extension direction of the grid, the distance from the peripheral unit to the drum drive unit is less than the distance from one end of the drum drive unit to the other end.

Images