Conductive structure for changing conductive method of developing magnetic roller, selenium drum powder box and conductive method

Abstract

The invention discloses a conductive structure for changing a conductive method of a developing magnetic roller, a selenium drum powder box and a conductive method, the conductive structure is applied to the selenium drum powder box, and the conductive structure comprises a conductive end side cover and a conductor; the electric conductor is arranged on the conductive end side cover, the electric conductor is provided with a first contact part and a second contact part, the first contact part can be arranged on the positioning structure in a sleeving manner, the second contact part is arranged on the outer side of the conductive end side cover, the first contact part is electrically connected with the end part of a magnetic roller of the selenium drum, and the second contact part is electrically connected with a powder feeding roller power supply contact on the printer. The conductor is integrated on the conductive end side cover, and the first contact part of the conductor is electrically connected with the end part of the magnetic roller, so that the internal structure of the toner cartridge powder box is simplified, and the whole structure is more compact and reasonable. Besides, a traditional powder feeding roller structure is omitted, and transmission of a rotating component is reduced, so that the rotating torque of the developing magnetic roller is effectively reduced, and the selenium drum runs more smoothly.

Description

Technical Field

[0001] This invention relates to the field of laser printing equipment technology, and in particular to a conductive structure, a toner cartridge, and a conductive method for changing the conductivity of the developing magnetic roller. Background Technology

[0002] The toner cartridge is the core imaging device of a laser printer. It mainly consists of a photosensitive drum assembly responsible for printing and an ink cartridge assembly filled with toner. Within the ink cartridge assembly, the developing roller is a key component affecting image quality. The developing roller effectively attracts toner from the ink cartridge and transfers it to the photosensitive drum through electrostatic attraction. The photosensitive drum is an aluminum drum body covered with an organic photoconductive material (OPC coating). It becomes charged by contact with the charging roller and is responsible for storing a latent electrostatic image. When the laser printer receives print data, the laser beam generated by the laser emitter sweeps across the photosensitive drum, first forming a latent image composed of charges on its surface. When this latent image passes through the developing roller in the ink cartridge assembly, toner is attracted to the photosensitive drum, and the latent image is converted into a real image. Then, the printing paper is fed in, and the toner on the photosensitive drum surface is transferred to the printing paper to form an image. After being heated at high temperature, the image is solidified on the printing paper, completing the printing process for one page. Toner (also known as ink powder) is mainly composed of resin, carbon black, and charging agents or magnetic powders.

[0003] Currently, some toner cartridges still use a combination of developing rubber rollers and toner feeding rollers made of sponge. Toner cartridges produced using this method have complex structures and assembly processes due to the combined developing method. In addition, the combined developing of the developing rubber roller and the toner feeding roller increases the working torque of the developing rubber roller, which ultimately leads to relatively poor working stability of the toner cartridge. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a conductive structure that changes the conductive method of the developing magnetic roller, eliminating the toner delivery roller and changing the conductive method of the developing magnetic roller, so that the power supply contacts of the toner delivery roller on the printer are electrically connected to the magnetic roller, satisfying the power supply requirements of the magnetic roller, thereby simplifying the internal structure of the toner cartridge.

[0005] The present invention also proposes a toner cartridge that uses a conductive structure designed according to the above-described conductive method.

[0006] The present invention also proposes a conductive method for the developing magnetic roller applied to the above-mentioned toner cartridge.

[0007] According to a first aspect of the present invention, the conductive structure of the developing magnetic roller is applied to a toner cartridge, the conductive structure comprising: Conductive end cap; and A conductor is disposed on the conductive end cover. The conductor has a first contact portion and a second contact portion. The first contact portion is disposed on the inner side of the conductive end cover and is electrically connected to the end of the developing magnetic roller of the toner cartridge. The second contact portion is disposed on the outer side of the conductive end cover and is electrically connected to the power supply contact of the printer's toner delivery roller.

[0008] The conductive structure according to embodiments of the present invention has at least the following beneficial effects: by integrating the conductor onto the conductive end cover and establishing an electrical connection between its first contact portion and the end of the developing magnetic roller, while simultaneously connecting the second contact portion to the power supply contact of the toner delivery roller on the printer, a highly integrated and stable electrostatic path is constructed. This conductive structure simplifies the internal structure of the toner cartridge, eliminating the need for a traditional toner delivery roller structure, resulting in a more compact and rational overall structure. Furthermore, by eliminating the traditional toner delivery roller structure, the transmission of rotating components is reduced, effectively lowering the rotational torque of the developing magnetic roller and making the toner cartridge operate more smoothly. The power supply contact of the toner delivery roller on the printer provides a stable and precise working electrostatic voltage to the developing magnetic roller, enabling uniform and efficient developing, thereby significantly improving the stability of the developing process and the consistency of printed image quality, and enhancing the overall working stability of the toner cartridge.

[0009] According to some embodiments of the present invention, a positioning structure is provided on the inner side of the conductive end cover, and the positioning structure is used to fix the conductor.

[0010] According to some embodiments of the present invention, the positioning structure includes a positioning post, the first contact portion can be sleeved on the outside of the positioning post, one end of the developing magnetic roller is inserted into the positioning post, the end of one end of the developing magnetic roller abuts against the side of the first contact portion, and the developing magnetic roller is electrically connected to the first contact portion.

[0011] According to some embodiments of the present invention, the positioning structure further includes a barrier portion disposed on the periphery of the positioning post, the barrier portion having a foolproof notch for avoiding the conductor.

[0012] According to some embodiments of the present invention, the positioning structure can be detachably installed on the inner side of the conductive end cover or integrally formed with the conductive end cover.

[0013] According to some embodiments of the present invention, the positioning structure further includes a mounting base disposed on the inner side of the conductive end cover, and the positioning post and the enclosure portion disposed on the inner side of the mounting base.

[0014] According to some embodiments of the present invention, the conductor has a plurality of bent portions, which are attached to the inner side of the positioning structure and the conductive end cap.

[0015] According to some embodiments of the present invention, the conductor is a metal conductor or a plastic conductor.

[0016] According to a second aspect of the present invention, the toner cartridge includes the conductive structure described in any one of the embodiments of the first aspect.

[0017] The toner cartridge according to the embodiments of the present invention has at least the following beneficial effects: the toner cartridge has all the beneficial effects brought about by the above-mentioned conductive structure, which will not be repeated here.

[0018] According to a third aspect embodiment of the present invention, the developing magnetic roller conductive method is applied to the toner cartridge described in the second aspect embodiment above. The developing magnetic roller conductive method includes the following steps: installing the conductor on the conductive end cover so that the first contact portion is connected to the end of the developing magnetic roller; installing the toner cartridge in a printer so that the second contact portion is electrically connected to the power supply contact of the printer's toner delivery roller; and electrically conducting the power supply contact of the printer's toner delivery roller to the end of the developing magnetic roller through the conductor.

[0019] The developing magnetic roller conductive method according to the embodiments of the present invention has at least the following beneficial effects: the developing magnetic roller conductive method has all the beneficial effects brought about by the toner cartridge mentioned above, which will not be repeated here.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of the toner cartridge according to a second aspect embodiment of the present invention; Figure 2 for Figure 1 The diagram shown illustrates the structure of the conductive structure in conjunction with the developing magnetic roller according to a first aspect embodiment of the present invention. Figure 3 for Figure 2 A schematic diagram of the conductive structure is shown. Figure 4 for Figure 3 The diagram shows a schematic of the conductive end cap of the conductive structure.

[0022] Icon labels: 1. Conductive structure; 2. Toner cartridge; 3. Developing magnetic roller; Conductive end cap 10; connecting hole 11; Conductor 20; First contact portion 21; Second contact portion 22; First bending portion 23; Second bending portion 24; Positioning structure 30; positioning post 31; enclosure part 32; foolproof notch 321; mounting base 33. Detailed Implementation

[0023] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0024] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0025] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0026] Reference Figures 2 to 4 According to the first aspect of the present invention, the conductive structure 1 is applied to the toner cartridge 2 (see reference 1). Figure 1 The conductive structure 1 includes a conductive end cover 10 and a conductive body 20. A positioning structure 30 is provided on the inner side of the conductive end cover 10. The conductive body 20 is disposed on the conductive end cover 10 and has a first contact portion 21 and a second contact portion 22. The first contact portion 21 can be disposed on the positioning structure 30, and the second contact portion 22 is disposed on the outer side of the conductive end cover 10. The first contact portion 21 is electrically connected to the end of the developing magnetic roller 3 of the toner cartridge 2, and the second contact portion 22 is electrically connected to the power supply contact of the toner feeding roller of the printer.

[0027] Specifically, the conductive structure 1 of the present invention is mainly used in the toner cartridge 2 of a laser printer, and its specific structure and installation connection relationship will be described below.

[0028] The conductive structure 1 of the present invention mainly includes a conductive end cover 10 and a conductive body 20. The conductive end cover 10 is typically integrally molded from engineering plastic with appropriate strength and insulation properties through injection molding. This end cover is used to encapsulate the end of the toner cartridge 2 and supports the internal rotating components. A through hole 11 can be provided on the wall of the end cover, which penetrates the inner and outer sides of the end cover. The conductive body 20 is an independent conductive plastic conductive body made of metal material with good elasticity and conductivity through stamping and bending or by injection molding of plastic with added conductive material. Its overall structure is mainly divided into two functional parts: a first contact part 21 and a second contact part 22. Correspondingly, the first contact part 21 can be set as an annular collar. During assembly, the first contact part 21 of the conductive sheet conductive body 20 is directly sleeved on the positioning structure 30, which makes the conductive body 20 accurately positioned and fixed on the conductive end cover 10. Simultaneously, the second contact portion 22 of the conductor 20 passes through the connecting hole 11, exposing part of its structure on the outside of the conductive end cover 10. The second contact portion 22 is preferably designed as a contact spring with a certain convex curvature or elasticity. It is conceivable that the first contact portion 21 can also be configured as a contact spring with a certain convex curvature or elasticity. Therefore, it should be noted that the specific shape of the first contact portion 21 of the conductor 20 provided by this invention is not specifically limited, as long as it enables the electrical connection between the developing magnetic roller 3 and the toner feeding roller power supply contacts on the printer via the conductor 20. It is also understood that a connecting groove (not shown in the figure) can be formed on the inner and outer surfaces of the conductive end cover 10. This connecting groove is used to avoid the conductor 20. The first contact portion 21 and the second contact portion 22 at both ends of the conductor 20 are respectively located on the inner and outer sides of the conductive end cover 10. In this case, the fixing method of the first contact portion 21 and the second contact portion 22 is not specifically limited, as long as it satisfies the requirement that the conductor 20 enables the connection of the power supply contacts on the inner and outer sides of the conductive end cover 10.

[0029] After the assembled conductive end cover 10 is installed onto the end of the toner cartridge 2, the first contact portion 21 of the conductor 20 maintains tight physical contact with the metal end of the developing magnetic roller 3 on the inner side of the end cover, thereby establishing a first electrical connection point. The second contact portion 22 of the conductor 20 is on the outer side of the end cover, maintaining elastic contact with the power supply contact of the toner delivery roller on the printer, thereby establishing a second electrical connection point. The high-voltage static electricity output by the printer is transmitted to the second contact portion 22 of the conductor 20 through the power supply contact of the toner delivery roller inside the printer, and then stably transmitted to the developing magnetic roller 3 by the first contact portion 21 of the conductor 20, providing it with the electrostatic charge required for operation. The conductive structure 1 of this embodiment highly integrates the power supply line on the end cover, forming a modular component. This design simplifies the internal structure of the toner cartridge 2, eliminates the structure of the toner delivery roller, thereby reducing the rotational resistance of the developing magnetic roller 3. At the same time, eliminating the structure of the toner delivery roller makes the structure more compact, easier to install, significantly improves production assembly efficiency, reduces material and manufacturing costs, and ensures the stability and reliability of current transmission.

[0030] Therefore, it is understood that the conductive structure 1 according to the embodiments of the present invention has at least the following beneficial effects: The conductive structure 1 provided by the present invention integrates the conductor 20 onto the conductive end cover 10 and establishes an electrical connection between its first contact portion 21 and the end of the developing magnetic roller 3. At the same time, the second contact portion 22 passes through the connecting hole 11 and contacts the power supply contact of the toner delivery roller on the printer. This constructs a highly integrated and stable electrostatic path, ensuring that the developing magnetic roller 3 can obtain a precise working electrostatic voltage, enabling it to perform uniform and efficient development. This significantly improves the stability of the development process and the consistency of the printed image quality, and enhances the overall working stability of the toner cartridge 2.

[0031] This integrated design simplifies the internal structure of the toner cartridge 2, eliminating the need for a traditional toner delivery roller, resulting in a more compact and rational overall structure.

[0032] Furthermore, by eliminating the traditional toner feeding roller structure and reducing the transmission of rotating parts, the rotational torque of the developing magnetic roller 3 is effectively reduced, making the toner cartridge 2 operate more smoothly. Moreover, from a production and manufacturing perspective, this optimized design, which eliminates the toner feeding roller, significantly reduces the material cost and assembly complexity of the toner cartridge 2, simplifies the production, assembly, and debugging processes, and achieves the goal of cost reduction and efficiency improvement.

[0033] Overall, this structure indirectly promotes the efficient use of toner by optimizing the fundamental aspect of electrical connections. It plays a positive role in reducing residual toner in the toner hopper and reducing environmental pollution, thus achieving the dual goals of performance improvement and environmental benefits.

[0034] Reference Figures 2 to 4In some embodiments of the present invention, a positioning structure 30 is provided on the inner side of the conductive end cover 10, which is used to fix the conductor 20. Specifically, on the inner side of the conductive end cover 10, the first contact portion 21 can be configured as an annular collar. During assembly, the first contact portion 21 of the conductor 20 is directly sleeved on the positioning structure 30, which allows the conductor 20 to be accurately positioned and fixed on the conductive end cover 10. At the same time, the second contact portion 22 of the conductor 20 passes through the connecting hole 11, exposing part of its structure to the outside of the conductive end cover 10. The second contact portion 22 is preferably designed as a contact spring with a certain convex curvature or elasticity. A positioning structure 30 is integrally formed or detachably provided, which is preferably a cylindrical pin.

[0035] Furthermore, referring to Figures 2 to 4 In some embodiments of the present invention, the positioning structure 30 includes a positioning post 31, a first contact portion 21 which can be sleeved on the outside of the positioning post 31, one end of the developing magnetic roller 3 is inserted into the positioning post 31, the end of one end of the developing magnetic roller 3 abuts against the side of the first contact portion 21, and the developing magnetic roller 3 is electrically connected to the first contact portion 21.

[0036] Specifically, in this embodiment, the positioning structure 30 is a positioning post 31. This positioning post 31 can be integrally molded with the conductive end cap 10 using an injection molding process. Preferably, it adopts a cylindrical structure with a precisely designed outer diameter to form an interference or transition fit with the first contact portion 21 of the conductor 20, ensuring stability after assembly. The positioning post 31 has a hollow cavity inside, the shape of which matches the end shape of the developing magnetic roller 3, used to accommodate and guide the insertion of one end of the developing magnetic roller 3. The first contact portion 21 of the conductor 20 is specifically a metal ring structure or an elastic retaining ring with an opening, its inner diameter matching the outer diameter of the positioning post 31. During installation, the operator directly places the first contact portion 21 onto the outer circumference of the positioning post 31, utilizing the elasticity of the metal material to tightly wrap around the positioning post 31, thereby achieving initial fixation and precise positioning of the conductor 20. One end of the developing magnetic roller 3 is machined to fit the internal cavity of the positioning post 31. During final assembly, this end is directly inserted into the hollow cavity of the positioning post 31. The axial length of the end of the developing magnetic roller 3 is precisely calculated so that, once inserted, its end face forms a tight mechanical contact with the inner surface of the first contact portion 21 of the conductor 20, which is sleeved on the outside of the positioning post 31. This contact surface constitutes a direct, stable, and low-resistance physical contact interface, ensuring that static electricity can be efficiently conducted from the metal end of the developing magnetic roller 3 to the first contact portion 21 of the conductor 20.

[0037] Understandably, the positioning post 31 acts as a mechanical skeleton, reliably fixing the conductor 20. Secondly, the positioning post 31 serves as a precision bearing seat at the end of the developing magnetic roller 3, ensuring the fixation, concentricity, and stability of the magnetic pole direction of the developing magnetic roller 3's rotation, which helps to reduce rotational torque. Finally, the positioning post 31 allows the end of the developing magnetic roller 3 to directly abut against the conductor 20, eliminating the need for additional conductive parts or cumbersome wiring processes, simplifying the assembly and debugging process, reducing material costs, and improving the reliability of electrical connections and product consistency.

[0038] Reference Figures 2 to 4 In some embodiments of the present invention, the positioning structure 30 further includes a blocking portion 32, which is disposed on the periphery of the positioning post 31. The blocking portion 32 has a foolproof notch 321, which is used to avoid the conductor 20 so that the first contact portion 21 can be connected to the second contact portion 22.

[0039] Specifically, in this embodiment, the positioning structure 30 adds a retaining portion 32 around the positioning post 31. This retaining portion 32, the conductive end cap 10, and the positioning post 31 can also be integrally formed by injection molding. Its height is slightly lower than the positioning post 31, forming a cylindrical or partially encircling fence-like structure surrounding the positioning post 31. The main function of the retaining portion 32 is to radially limit the conductive body 20 fitted onto the positioning post 31, thereby improving the overall stability and reliability of the structure. Furthermore, the retaining portion 32 is provided with a foolproof notch 321. This foolproof notch 321 is an opening or groove of a specific shape machined into the continuous wall of the retaining portion 32. Its position and shape are designed according to the specific configuration of the conductive body 20 (especially the transition portion connecting the first contact portion 21 and the second contact portion 22). During assembly, the operator needs to align the transition portion of the conductive body 20 and place it into this foolproof notch 321. This design ensures that the conductor 20 can only be installed in a single, correct direction and angle, effectively avoiding the possibility of reverse, misaligned, or tilted installation, thus achieving a Poka-yoke function. This not only simplifies assembly operations, reduces the skill requirements for operators, and improves assembly efficiency, but also eliminates the risk of poor electrical connections or short circuits caused by incorrect installation at the source. Simultaneously, the Poka-yoke notch 321 provides clearance for the conductor 20, while its sidewall also provides auxiliary positioning and support for the conductor 20, working in conjunction with the positioning post 31 to ensure the absolute stability of the conductor 20's position during operation, further guaranteeing the durability and reliability of contact with the end of the developing magnetic roller 3 and the printer's toner delivery roller power supply contacts. This design significantly improves the product's assembly yield, long-term stability, and operational safety with almost no additional cost.

[0040] In other embodiments of the present invention, besides the positioning structure 30 in the aforementioned embodiments being integrally molded with the conductive end cover 10 via injection molding, in this embodiment, the positioning structure 30 can also be designed to be detachably installed on the inner side of the conductive end cover 10. Specifically, in this embodiment, the positioning structure 30 (including the positioning post 31 and the enclosure part 32) is not integrally injection molded with the conductive end cover 10, but exists as an independent, detachable modular component. The positioning structure 30 is preferably manufactured separately using engineering plastics such as POM or nylon, which have good dimensional stability and wear resistance. To achieve detachable installation, a standard installation interface is pre-set on the inner side of the conductive end cover 10. This interface can be a snap-fit ​​groove, a threaded hole, or a guide groove, etc. Correspondingly, a matching connection structure, such as an elastic snap, a screw post, or a slider, is provided at the bottom of the positioning structure 30. During assembly, the positioning structure 30 can be firmly and accurately locked in the designated position on the inner side of the conductive end cover 10 by simple operations such as pressing, screwing, or sliding. By standardizing the design of the conductive end cover 10 and decoupling it from the positioning structure 30, different specifications of the positioning structure 30 can be flexibly replaced according to different application requirements. Specifically, different models of toner cartridges 2 or performance requirements may require the use of conductive bodies 20 with different shapes, sizes, or elasticities. By replacing the positioning structure 30 with positioning posts 31 of different outer diameters, enclosure parts 32 of different heights or opening angles, and foolproof notches 321, various conductive bodies 20 can be perfectly adapted to ensure that they always achieve the best fixing and positioning effect. Different models of laser printers have different requirements for the internal space of their toner cartridges 2, the position of the developing magnetic roller 3, and the power supply contacts of the toner delivery roller on the printer. By replacing the positioning structure 30 with different heights or radial dimensions, the final spatial position of the conductive body 20 can be adjusted so that its second contact part 22 can be accurately aligned with the power supply contacts of the toner delivery roller on the printer, while ensuring that the first contact part 21 maintains a stable electrical connection with the end of the developing magnetic roller 3. This allows the conductive end cover 10 of the same basic structure to be widely used in various toner cartridge 2 models in a product series, greatly improving the versatility of the parts.

[0041] Reference Figures 2 to 4In some embodiments of the present invention, the positioning structure 30 further includes a mounting base 33, which is disposed inside the conductive end cover 10. The positioning post 31 and the enclosure portion 32 are disposed inside the mounting base 33. Specifically, as can be seen from the above embodiments, in this embodiment, the positioning structure 30 is a complete sub-module, and its core component includes a mounting base 33. The mounting base 33 is the basic load-bearing component of the entire detachable function, and is usually made of engineering plastic into a plate-shaped or block-shaped structure with a specific contour. Its design purpose is to achieve quick and stable docking with the standardized mounting interface inside the conductive end cover 10 in the above embodiments. The positioning post 31 and the enclosure portion 32 are no longer directly connected to the conductive end cover 10, but are first integrated into the mounting base 33. Specifically, the positioning post 31 and the enclosure portion 32 extend integrally from the surface of the mounting base 33 toward the internal space of the conductive end cover 10 (i.e., the "inner side of the mounting base 33"). This design allows the height of the positioning post 31, the shape of the enclosure 32, and the position of the foolproof notch 321 to be precisely controlled and freely designed on the independent mounting base 33 module without modifying the conductive end cover 10 body.

[0042] Mounting base 33 concentrates all the precision positioning features on a single, replaceable module, reducing the machining accuracy and complexity requirements of the conductive end cap 10 body mold and significantly saving mold costs. Furthermore, mounting base 33 greatly enhances the modularity and serialization capabilities of the product design. By designing and manufacturing a series of mounting bases 33 with different positioning post heights 31, angles, or enclosure part 32 shapes, various models of developing magnetic rollers 3 and conductors 20 can be quickly adapted, enabling the coverage of the most product models with the fewest common parts (conductive end caps 10). This greatly improves production flexibility and material management efficiency, making it an excellent solution for achieving cost reduction and efficiency improvement goals.

[0043] Reference Figure 3 In some other embodiments of the present invention, the conductor 20 has a plurality of bent portions, which are attached to the positioning structure 30 and the conductive end cap 10.

[0044] Specifically, in this embodiment, the conductor 20 does not adopt a simple flat sheet structure, but rather has several bent portions stamped on its body. These can be one, two, or even more bent portions; the number of bent portions is not specifically limited in this embodiment and can be determined according to the specific shape of the positioning structure 30. These bent portions are specific angled bending structures made through precision stamping and bending processes of metal sheets. Their core design purpose is to enhance the overall mechanical strength, rigidity, and fatigue resistance of the conductor 20. Specifically, the location and manner of these bent portions are as follows: a portion of the bent portions are located in the first contact portion 21 area of ​​the conductor 20. The first contact portion 21, based on being fitted onto the outside of the positioning post 31, is bent outwards to form a reinforcing rib structure that closely adheres to the outer contour of the positioning structure 30. This not only increases the contact area and clamping force between the first contact portion 21 and the positioning structure 30, preventing it from loosening due to the rotational vibration of the developing magnetic roller 3, but also greatly enhances the ability of the first contact portion 21 to resist radial deformation. Another portion of the bending section is located in the transition area connecting the first contact portion 21 and the second contact portion 22. The U-shaped or V-shaped bend at the connecting hole 11 effectively disperses the stress generated during installation and operation, preventing metal fatigue fracture caused by stress concentration and ensuring the long-term reliability of the electrical connection path. Furthermore, bending sections extend and adhere to the inner surface of the mounting base 33 and / or the conductive end cap 10. These bending sections act like reinforcing ribs, transforming the conductor 20 from a simple two-dimensional spring into a partially three-dimensional, stable structure. Their close contact with the plane of the mounting base 33 or the end cap not only provides additional support points, greatly reducing the amplitude and plastic deformation risk of the conductor 20 under frequent stress, but also further optimizes the heat dissipation path of the conductor 20.

[0045] Furthermore, referring to Figure 3 In some other embodiments of the present invention, the conductor 20 has a first bending portion 23 and a second bending portion 24, the first bending portion 23 and the second bending portion 24 are connected in sequence, the first contact portion 21 and the second contact portion 22 are connected through the first bending portion 23 and the second bending portion 24, the first bending portion 23 is attached to the positioning structure 30, and the second bending portion 24 is attached to the inner side of the conductive end cover 10.

[0046] In this embodiment, the conductor 20 has several bends, designated as a first bend 23 and a second bend 24, thus forming two bends. These two bends are arranged sequentially on the substrate of the conductor 20 and interconnected, together forming the core conductive and supporting bridge connecting the first contact 21 and the second contact 22. Specifically, starting from the first contact 21, the metal material is first precisely bent to form the first bend 23. The angle and curvature of the first bend 23 are carefully designed so that it can adhere to the upper surface or side of the mounting base 33 over a large area after installation. This close fit provides a solid foundation support for this part of the conductor 20, effectively transmitting and dispersing the radial force and vibration from the developing magnetic roller 3 borne by the first contact 21 to the rigid mounting base 33 through the first bend 23, greatly reducing stress concentration at the root of the first contact 21. Subsequently, the material extending from the first bend 23 is bent a second time to form the second bend 24. The bending direction and angle of the second bend 24 allow it to extend naturally and fit snugly against the inner wall of the conductive end cap 10 and the wall of the connecting hole 11. This design achieves the connection of the conductor 20 to the second key fixing point of the main structure. By fitting snugly against the body of the conductive end cap 10, the second bend 24 not only provides additional support and effectively suppresses the swaying of the conductor 20 in the length direction, but more importantly, it also transmits the force on the middle part of the conductor 20 and the second contact part 22 area to the larger structure.

[0047] In some embodiments of the present invention, the second contact portion 22 is provided with a conductive contact (not shown in the figure), which is electrically connected to the power supply contact of the toner roller on the printer. In this embodiment, the conductive contact is preferably made of a material with excellent conductivity, high wear resistance, and arc corrosion resistance, such as gold- or silver-plated copper alloys, silver-nickel (AgNi) materials, or other high-performance electrical contact materials. The conductive contact can be designed as a protruding hemispherical, spherical, ellipsoidal, or a raised or recessed shape with a smooth arc transition. This shape design optimizes the contact method with the power supply contact of the toner roller on the printer from possible surface contact or uncertain line contact to a stable and reliable point contact.

[0048] Reference Figure 1According to a second aspect embodiment of the present invention, the toner cartridge 2 includes the conductive structure 1 of any one of the embodiments of the first aspect. The toner cartridge 2 of this embodiment mainly includes the conductive structure 1 as described in any one of the embodiments of the first aspect. It also includes components such as a photosensitive drum assembly and a toner cartridge assembly. The toner cartridge assembly contains toner and is equipped with a developing magnetic roller 3 (i.e., a developing roller) for adsorbing and developing the toner. The conductive structure 1 serves as a key electrical connection module of the toner cartridge 2. Its conductive end cover 10 is fixedly installed at the end of the toner cartridge assembly to seal the toner cartridge and provide support for the internal rotating components. In this toner cartridge 2, the specific form of the conductive structure 1 can be the structure described in any of the foregoing embodiments. For example, its first contact portion 21 of the conductor 20 maintains a stable electrical connection with the metal end of the developing magnetic roller 3, thereby obtaining operating voltage from the printer host; simultaneously, its second contact portion 22 (or a dedicated conductive contact on the second contact portion 22) maintains elastic contact with the printer's toner delivery roller power supply contact, reliably conducting the operating electrostatic voltage to the developing magnetic roller 3. By integrating the aforementioned conductive structure 1, the toner cartridge 2 of this embodiment achieves highly reliable electrical connection between the developing magnetic roller 3 and the printer's toner delivery roller power supply contacts. This optimized electrical connection ensures a continuous and stable electrostatic supply to the developing magnetic roller 3, enabling it to deliver toner accurately and evenly, thereby directly improving the consistency of printed image quality. Simultaneously, this structure eliminates the toner delivery roller mechanism, simplifies the overall internal layout of the toner cartridge 2, reduces the rotational resistance of the developing magnetic roller 3, and enhances operational stability. From a manufacturing perspective, this design significantly simplifies the assembly process of the toner cartridge 2 and improves production efficiency.

[0049] It is also understood that the developing magnetic roller 3 in the toner cartridge 2 with conductive structure 1 provided in this embodiment is electrically connected to the power supply contact of the printer's toner delivery roller. Therefore, it is conceivable that the toner cartridge 2 provided in this embodiment can also be applied to some printers with power supply contacts for the toner delivery roller.

[0050] According to a third aspect embodiment of the present invention, the developing magnetic roller conductive method is applied to the toner cartridge 2 of the second aspect embodiment described above. The developing magnetic roller conductive method includes the following steps: installing a conductor 20 on a conductive end cover 10 so that a first contact portion 21 is connected to the end of the developing magnetic roller 3; installing the toner cartridge 2 in a printer so that a second contact portion 22 is electrically connected to the power supply contact of the printer's toner delivery roller; and electrically conducting the power supply contact of the printer's toner delivery roller to the end of the developing magnetic roller 3 through the conductor 20.

[0051] The present invention provides a stable and reliable electrostatic path for the developing magnetic roller, ensuring electrostatic transmission between the developing magnetic roller 3 and the power supply contacts of the toner delivery roller. The core of this developing magnetic roller conductivity method lies in constructing a complete electrostatic path from the printer body to the power supply contacts of the toner delivery roller, and then through the conductor 20 to the end of the developing magnetic roller 3. The method specifically includes the following steps: First, the preparation and pre-assembly steps are performed. The conductor 20 is installed on the conductive end cover. In this step, the first contact portion 21 (e.g., a sleeve portion) of the conductor 20 is sleeved onto the positioning structure 30 inside the conductive end cover 10, and its second contact portion 22 (e.g., a contact point portion) is guided through the conductive end cover 10 (e.g., a connecting hole) to the outside of the conductive end cover 10, thereby forming an electrostatic path. Next, the electrostatic path connection step is performed. When the assembled conductive end cover 10 assembly is installed onto the toner cartridge end of the toner cartridge 2, the first contact portion 21 makes electrical contact with the metal end of the developing magnetic roller 3, thereby establishing a stable mechanical contact and electrical connection between the first contact portion 21 of the conductor 20 and the metal end of the developing magnetic roller 3. This allows the developing magnetic roller 3 to acquire its own working static electricity while also becoming an electrostatic conduction node. After the assembled toner cartridge 2 is installed into the printer, the second contact 22 makes electrical contact with the power supply contact of the toner delivery roller on the printer, thereby electrically connecting the second contact 22 of the conductor 20 to the power supply contact of the toner delivery roller on the printer. It should be noted that the power supply contact of the toner delivery roller on this printer is the power supply contact of the toner delivery roller provided inside the printer body.

[0052] Finally, during printer operation, the current path is established and operates as follows: high voltage static electricity is emitted from the printer, flows through the power supply contacts of the printer's toner roller, then flows into the body of the conductor 20 through the second contact portion 22 of the tightly contacting conductor 20, and is then transmitted to its first contact portion 21 via the conductive path of the conductor 20. Finally, it reaches and is electrically connected to the end of the developing magnetic roller 3 through the contact surface between the first contact portion 21 and the end of the developing magnetic roller 3.

[0053] It is conceivable that the developing magnetic roller conductive method provided in this embodiment of the invention can be applied to toner cartridge 2 where the developing rubber roller and toner delivery roller combination development is replaced by a single developing magnetic roller 3. However, due to the elimination of the traditional structure of the toner delivery roller, the original power supply method of the developing magnetic roller 3 cannot meet the requirements of print quality. Therefore, this method can eliminate the toner delivery roller structure in the toner cartridge 2 and replace the traditional developing rubber roller structure. Instead, the conductive body 20 structure cleverly utilizes the original toner delivery roller power supply contact on the printer to conduct the high voltage static electricity generated in the printer to the developing magnetic roller 3 through the power supply contact, thereby achieving a stable power supply to the developing magnetic roller 3. This ensures that the developing magnetic roller 3 can obtain a precise working static voltage, enabling it to develop evenly and efficiently, thus significantly improving the stability of the developing process and the consistency of the printed image quality, and enhancing the overall working stability of the toner cartridge 2.

[0054] Therefore, it can be inferred that the conductive method of the developing magnetic roller provided in this embodiment of the invention can be applied to printer models with a single developing roller developing method. Thus, this method can not only change the developing method of the toner cartridge 2 from the original combination of the toner feeding roller and the developing roller to a single developing magnetic roller developing method, but also simplify the internal structure of the toner cartridge 2, eliminate the traditional toner feeding roller, and make the overall structure more compact and reasonable. It can also simplify the assembly process of the toner cartridge 2, and significantly improve the reliability and consistency of the electrical connection, providing core support for ensuring the stability of printing quality.

[0055] Furthermore, by eliminating the traditional toner feeding roller structure and reducing the transmission of rotating parts, the rotational torque of the developing magnetic roller 3 is effectively reduced, making the toner cartridge 2 operate more smoothly. Moreover, from a production and manufacturing perspective, this optimized design, which eliminates the toner feeding roller, significantly reduces the material cost and assembly complexity of the toner cartridge 2, simplifies the production, assembly, and debugging processes, and achieves the goal of cost reduction and efficiency improvement.

[0056] Overall, this structure indirectly promotes the efficient use of toner by optimizing the fundamental aspect of electrical connections. It plays a positive role in reducing residual toner in the toner hopper and reducing environmental pollution, thus achieving the dual goals of performance improvement and environmental benefits.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A conductive structure for altering the conductivity of a developing magnetic roller, characterized in that, The conductive structure of the method for changing the conductivity of the developing magnetic roller is applied to the toner cartridge, and the conductive structure includes: Conductive end cap; and A conductor is disposed on the conductive end cover. The conductor has a first contact portion and a second contact portion. The first contact portion is disposed on the inner side of the conductive end cover and is electrically connected to the end of the developing magnetic roller of the toner cartridge. The second contact portion is disposed on the outer side of the conductive end cover and is electrically connected to the power supply contact of the printer's toner delivery roller.

2. The conductive structure of the method for changing the conductivity of the developing magnetic roller according to claim 1, characterized in that, A positioning structure is provided on the inner side of the conductive end cover, and the positioning structure is used to fix the conductor.

3. The conductive structure of the method for changing the conductivity of the developing magnetic roller according to claim 2, characterized in that, The positioning structure includes a positioning post, the first contact portion can be sleeved on the outside of the positioning post, one end of the developing magnetic roller is inserted into the positioning post, the end of one end of the developing magnetic roller abuts against the side of the first contact portion, and the developing magnetic roller is electrically connected to the first contact portion.

4. The conductive structure of the method for changing the conductivity of the developing magnetic roller according to claim 3, characterized in that, The positioning structure also includes a barrier portion disposed around the positioning post. The barrier portion has a foolproof notch for avoiding the conductor.

5. The conductive structure of the method for changing the conductivity of the developing magnetic roller according to claim 2, characterized in that, The positioning structure can be detachably installed on the inside of the conductive end cover or integrally formed with the conductive end cover.

6. The conductive structure of the method for changing the conductivity of the developing magnetic roller according to claim 4, characterized in that, The positioning structure also includes a mounting base, which is disposed on the inner side of the conductive end cover, and the positioning post and the enclosure portion are disposed on the inner side of the mounting base.

7. The conductive structure of the method for changing the conductivity of the developing magnetic roller according to claim 2, characterized in that, The conductor has several bent portions, which are attached to the inner side of the positioning structure and the conductive end cap.

8. The conductive structure of the method for changing the conductivity of the developing magnetic roller according to claim 1, characterized in that, The conductor is a metal conductor or a plastic conductor.

9. A toner cartridge, characterized in that, The conductive structure includes the method for changing the conductivity of the developing magnetic roller as described in any one of claims 1 to 8.

10. A method for conducting electricity on a developing magnetic roller, characterized in that, The toner cartridge according to claim 9, wherein the conductive method for the developing magnetic roller includes the following steps: installing the conductor on the conductive end cover so that the first contact portion is connected to the end of the developing magnetic roller; installing the toner cartridge on the printer so that the second contact portion is electrically connected to the power supply contact of the printer's toner delivery roller; and electrically connecting the power supply contact of the printer's toner delivery roller to the end of the developing magnetic roller through the conductor.

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