Drum assembly and developing box

Abstract

The utility model discloses a drum assembly capable of detachably containing a developing box, the drum assembly and the developing box can be detachably installed on an image forming device together, the image forming device is provided with a first electric contact pin and a second electric contact pin, and the drum assembly comprises a drum frame, a first electric contact pin, a second electric contact pin and a second electric contact pin, and the drum frame is provided with a first side wall and a second side wall in the first direction; a photosensitive drum that rotates about an axis extending in a first direction; the first chip is arranged on the first side wall, information of the drum assembly is stored in the first chip, and the first chip is directly and electrically connected with the first electric contact pin; the second chip is arranged on the first side wall, information of the developing box is stored in the second chip, and the second chip is not directly and electrically connected with the second electric contact pin. The first chip and the second chip are arranged on the drum assembly, and the first chip and the second chip respectively record different identification information, so that the universality of the drum assembly is improved, the diversity of the developing box is increased, and one drum assembly is adaptive to different developing boxes.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic imaging equipment field, concretely relates to a drum assembly and developing box. BACKGROUND

[0002] The processing box is a widely used detachable part on the image forming device, and the processing box comprises a developing box and a drum assembly. The developing box can be installed on the drum assembly and installed to the image forming device together with the drum assembly. The drum assembly is provided with a first chip for storing information of the drum assembly. The developing box is provided with a second chip for storing information of the developing box. The sidewall of the image forming device has a first electric contact needle and a second electric contact needle. When the developing box and the drum assembly are installed to the image forming device in cooperation, the first electric contact surface on the first chip is in contact with the first electric contact needle. The image forming device identifies the information of the drum assembly. The second electric contact surface on the second chip is in contact with the second electric contact needle. The image forming device identifies the information of the developing box. After identification, the developing box and the drum assembly start to work.

[0003] The above processing box has different chips in the drum assembly and the developing box respectively to store different information. However, the chips of some developing boxes can be externally arranged in other parts, i.e. not arranged on the developing box. The chips cannot be used to identify the information of the developing box and the drum assembly at the same time. In addition, the information of the second chip arranged in the developing box needs to be adapted. Therefore, a processing box capable of adapting to multiple types of developing box chips is needed. UTILITY MODEL CONTENT

[0004] The drum assembly and the developing box of the utility model can effectively solve the problem that the existing processing box cannot effectively adapt to different developing box chips.

[0005] According to one aspect of the utility model, a drum assembly can detachably accommodate a developing box. The drum assembly and the developing box can be detachably installed on an image forming device together. The image forming device has a first electric contact needle and a second electric contact needle. The drum assembly comprises:

[0006] a drum frame having a first sidewall and a second sidewall in a first direction;

[0007] a photosensitive drum rotating around an axis extending in the first direction;

[0008] a first chip arranged on the first sidewall. The first chip stores information of the drum assembly. The first chip is directly electrically connected with the first electric contact needle;

[0009] a second chip arranged on the first sidewall. The second chip stores information of the developing box. The second chip is not directly electrically connected with the second electric contact needle.

[0010] In some embodiments, a second chip holder is movably disposed on the first sidewall, the second chip is disposed on the second chip holder, and the second chip holder is movable relative to the drum frame.

[0011] In some embodiments, a first holder is disposed on the first sidewall, the second chip holder is movably disposed on the first holder, and an elastic member is disposed between the second chip holder and the first holder, the elastic member enabling the second chip holder to return to an original position after being moved.

[0012] In some embodiments, a pivot is further disposed between the second chip holder and the first holder, and the elastic member is disposed on the pivot, the second chip holder being rotatable relative to the first holder via the pivot.

[0013] In some embodiments, the first sidewall is provided with a first holder, and the second chip is fixedly disposed on a side of the first holder facing the photosensitive drum in a second direction, the second direction being orthogonal to the first direction.

[0014] In some embodiments, the first holder is provided with a recess on a side thereof close to the photosensitive drum in the second direction, and the second chip is fixedly installed in the recess.

[0015] In some embodiments, the second chip is disposed on a side of the drum frame away from the first chip in a third direction, and the second chip is closer to the second sidewall than the first chip in the first direction, the first direction being orthogonal to the third direction.

[0016] In some embodiments, the first chip is movable relative to the drum frame.

[0017] In some embodiments, the developing cartridge comprises a cartridge holder, and the cartridge holder is provided with a cartridge chip, when the developing cartridge is installed on the drum assembly and installed on the image forming apparatus together with the drum assembly, the second chip is not electrically connected with the second electrical contact pin, and the cartridge chip is electrically connected with the second electrical contact pin.

[0018] According to another aspect of the present application, a developing cartridge is provided, which is detachably installed on any one of the drum assemblies described above, and the developing cartridge comprises:

[0019] a cartridge body for accommodating a developer, the cartridge body having a first end and a second end in a first direction;

[0020] a developing roller rotatable about an axis extending in the first direction;

[0021] an electrical contact portion disposed on the first end;

[0022] The electric contact part is electrically connected with the second chip when the developing cartridge is installed on the drum assembly.

[0023] Compared with the prior art, the drum assembly has the following beneficial effects:

[0024] The first chip can be electrically connected with the image forming device and be recognized, and the second chip can be electrically connected with the image forming device and be recognized, so that the drum assembly can be matched with the developing cartridge without the chip and matched with the developing cartridge with the cartridge chip on the cartridge body, the versatility of the drum assembly is improved, the diversity of the developing cartridge is increased, and one drum assembly can be matched with different developing cartridges. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of the drum assembly in embodiment one;

[0026] Figure 2 is a schematic diagram of the overall structure of the drum assembly in embodiment one from another perspective;

[0027] Figure 3 is a schematic diagram of the overall structure of the drum assembly in embodiment one from another perspective;

[0028] Figure 4 is a schematic diagram of the overall structure of the drum assembly in embodiment one from another perspective;

[0029] Figure 5 is a schematic diagram of the overall structure of the drum assembly in embodiment one from another perspective;

[0030] Figure 6 is a schematic diagram of the overall structure of the drum assembly in embodiment one from another perspective;

[0031] Figure 7 is a schematic diagram of the overall structure of the drum assembly in embodiment one from another perspective;

[0032] Figure 8 is a schematic diagram of the overall structure of the drum assembly in embodiment one from another perspective;

[0033] Figure 9 is a schematic diagram of the overall structure of the drum assembly in embodiment one from another perspective;

[0034] Figure 10 is a schematic diagram of the overall structure of the drum assembly in embodiment one from another perspective;

[0035] Figure 11 is a schematic diagram of the overall structure of the drum assembly in embodiment one from another perspective; is a schematic diagram of the overall structure of the drum assembly in embodiment one from another perspective;

[0036] Figure 12 This is a three-dimensional schematic diagram of the processing box in Embodiment 2;

[0037] Figure 13 This is a three-dimensional schematic diagram of the first end of the drum assembly in Embodiment 3;

[0038] Figure 14 This is a partial cross-sectional schematic diagram of the developing cartridge installed at the first end of the drum assembly in Embodiment 3. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0040] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] This utility model relates to a drum assembly. The processing box includes a developing box and a drum assembly, which can be detachably installed in an image forming apparatus, such as an electronic photographic printer, electronic copier, fax machine, etc.

[0042] The present invention will now be described in further detail with reference to the accompanying drawings.

[0043] Example 1

[0044] like Figure 1 , Figure 2 The diagram schematically illustrates a drum assembly 2 according to one embodiment of the present invention. As shown in the figure, for ease of description, the left-right direction is taken as the first direction, the front-back direction as the second direction, and the up-down direction as the third direction. These directions are merely one set for the convenience of describing the components of this solution and are not specifically defined. In other embodiments, the directions may be defined in other ways. The drum assembly 2 can detachably accommodate the developing cartridge 1.

[0045] The drum assembly 2 has a drum frame 20 and a photosensitive drum 23, the drum frame 20 is generally a frame structure, the drum frame 20 includes a first side wall 21 and a second side wall 22 in the first direction, the photosensitive drum 23 is rotatably supported by the first side wall 21 and the second side wall 22, and the photosensitive drum 23 can rotate around an axis extending in the first direction. The first side wall 21 of the drum assembly 2 has a first guide rail 211, and the second side wall 22 has a second guide rail 221, the first guide rail 211 and the second guide rail 221 are symmetrically arranged in the first direction, and the first guide rail 211 and the second guide rail 221 are formed by opening a notch, which serves as a guide when the developing cartridge 1 is installed in the drum assembly 2, facilitating the smooth installation of the developing cartridge 1 into the drum assembly 2. In the state that the developing cartridge 1 is installed in the drum assembly 2, the first side wall 21 is adjacent to the right side of the developing cartridge 1, and the second side wall 22 is adjacent to the left side of the developing cartridge 1.

[0046] The drum assembly 2 is further provided with a first drum guide 213 and a second drum guide 223 at both ends of the photosensitive drum 23, the first drum guide 213 and the second drum guide 223 adopt the structure of a circular shaft, and in the first direction, the first drum guide 213 and the second drum guide 223 are symmetrically arranged, which are used to cooperate with the tracks on the side walls of the image forming apparatus when the drum assembly 2 is installed in the image forming apparatus, facilitating the drum assembly 2 to be more conveniently installed in the image forming apparatus. In the second direction, the outer surfaces of the two side walls of the drum frame 20 are further provided with a first drum protrusion 212 and a second drum protrusion 222 at positions close to the rear sides of the first guide rail 211 and the second guide rail 221, the first drum protrusion 212 and the second drum protrusion 222 are symmetrically arranged in the first direction, close to the lower side of the drum frame 20, which are used to further cooperate with the left and right side walls of the image forming apparatus when the drum assembly 2 is installed in the image forming apparatus, that is, jointly act with the first drum guide 213 and the second drum guide 223, so that the drum assembly 2 is more conveniently installed in the image forming apparatus. In the second direction, a drum handle 27 is arranged at the rear side of the drum frame 20 and between the two side walls of the drum frame 20, and a user can install / dismount the drum assembly 2 in the image forming apparatus by gripping the drum handle 27.

[0047] The bottom of the drum frame 20 in the third direction is further provided with a paper guide roller 28 and a paper inlet 29. When the developing cartridge 1 and the drum assembly 2 are installed in the image forming device and start to work, the paper guide roller 28 facilitates the transfer carrier (such as paper and the like) to enter the paper inlet 29 more conveniently, and the paper guide roller 28 guides the paper. The paper enters the inside of the drum assembly 2 through the paper inlet 29, and then transfers the developer to the paper to complete the developing work. The drum frame 20 is provided with a first force applying member 214 and a second force applying member 224 on the side of the first side wall 21 and the second side wall 22, respectively, which is close to the handle 27 in the first direction. The first force applying member 214 and the second force applying member 224 are symmetrically arranged in the first direction, and are used to apply a pushing force to the developing cartridge 1 in the second direction (forward) when the developing cartridge 1 is installed in the drum assembly 2.

[0048] The drum assembly 2 further comprises a charging assembly 24. In the third direction, the charging assembly 24 is arranged on the upper side of the photosensitive drum 23. The charging assembly 24 comprises a corona wire 242, a grid (not shown), and a drum electrode 225 arranged on the second side wall 22. When the drum assembly 2 is installed in the image forming device, the drum electrode 225 is electrically connected with the image forming device, so as to charge the corona wire 242 and the grid. The corona wire 242 ionizes the air, and the ionized air is charged by the grid to charge the photosensitive drum 23. Then, the developing cartridge 1 is used to complete the developing work. The drum frame 20 further comprises a cleaning member 241, which can move left and right in the first direction and act on the corona wire 242, so as to clean the corona wire 242 and prevent impurities from depositing on the corona wire 242 to affect the ionization effect.

[0049] As shown in Figures 3-5 The developing cartridge 1 comprises a cartridge body 10, a developing assembly, a driving part 40, a first cover 111, and a bearing part 121.

[0050] The cartridge 10 has a cuboid shape and a hollow structure inside to store the developer. The cartridge 10 has a first end 11 and a second end 12 in a first direction, a third end 13 and a fourth end 14 in a second direction, a fifth end 15 and a sixth end 16 in a third direction. In this application, the developing cartridge 1 is detachably installed in the drum assembly 2, so it shares the end face with the drum assembly 2. The fourth end 14 is provided with a handle part 141, and the user can install / detach the developing cartridge 1 in the drum assembly 2 through the handle part 141. The third end 13 is also provided with a powder outlet knife 132 and a plurality of ribs 133 arranged in the first direction. The powder outlet knife 132 abuts against the developing roller 131 to control the thickness of the developer on the developing roller 131, preventing the developer on the developing roller 131 from being too thick and affecting the developing quality. The plurality of ribs 133 are used to reinforce the third end 13 of the cartridge 10 to prevent it from deforming and causing the developing roller 131 to be unable to be installed or sealed, thereby causing the developer to leak. The second end 12 is also provided with a powder filling port 125 for filling the cartridge 10 with developer. The powder filling port 125 is provided with a cover matched therewith, and the cover is used to seal the powder filling port 127 to prevent the developer in the cartridge 10 from leaking. The second end 12 is also provided with a protruding part 126. When the developing cartridge 1 and the drum assembly 2 are installed in the image forming device but not in place, the protruding part 126 can cooperate with the image forming device to enable the developing cartridge 1 and the drum assembly 2 to be installed in place.

[0051] Further, the second end 12 is also provided with a locked part 122, and the drum frame 20 is provided with a locking part 226 arranged at the second side wall 22. The locked part 122 can be fixed with the locking part 226, and when the developing cartridge 1 is installed in the drum assembly 2 and does not cooperate with the image forming device, the locking part 226 and the locked part have a certain distance therebetween.

[0052] The developing assembly includes a developing roller 131, a stirring frame (not shown in the figure) and a powder feeding roller (not shown in the figure), which are all rotatably installed between the first end 11 and the second end 12. The rotation axes of the developing roller 131, the stirring frame and the powder feeding roller all extend in the first direction. The powder feeding roller is arranged adjacent to the developing roller 131. The developing roller 131 is partially exposed to the third end 13 (front side). The stirring frame is used to stir the developer in the containing cavity to prevent the developer from caking and to provide sufficient developer for the powder feeding roller, so that the powder feeding roller can normally supply powder to the developing roller 131. After the developing cartridge 1 and the drum assembly 2 are installed in the image forming device, the developing roller 131 can abut against the photosensitive drum 23 to realize the developing operation.

[0053] The first end 11 is further provided with a first pushing part (not shown in the figure), which can receive a pushing force exerted by the first force applying part 214 on the drum assembly 2 when the developing cartridge 1 is installed in the image forming device. The second end 12 is provided with a second pushing part 123, which is symmetrically arranged with the first pushing part in the first direction and can cooperate with the second force applying part 224 to receive a pushing force exerted by the second force applying part 224. When the developing cartridge 1 is installed on the drum assembly 2, the second pushing part 123 and the first pushing part respectively receive the pushing forces exerted by the second force applying part 224 and the first force applying part 214 in the second direction to force the developing cartridge 1 to approach the photosensitive drum 23, so that the developing roller 131 contacts the photosensitive drum 23, facilitating development.

[0054] The driving part 40 is rotatably arranged at the first end 11 of the cartridge body 10, used to receive a driving force output by the image forming device and transmit the driving force to the developing cartridge 1. In the first direction, the driving part 40 can be exposed through the first cover 111. The driving part 40 receives the driving force and transmits the driving force to the developing roller 131, the stirring frame and the powder feeding roller through a gear meshing transmission structure, so that the developing roller 131, the stirring frame and the powder feeding roller rotate.

[0055] The first cover 111 is arranged at the first end 11 and used to surround and protect part of the structure of the gear transmission structure and the driving part 40. The first cover 111 is detachably mounted at the first end 11. The first cover 111 is provided with a first guide part 112, which is a columnar structure extending in the first direction. The first guide part 112 extends close to one side of the axis direction of the developing roller 131. When the developing cartridge 1 is installed on the drum assembly 2, the first guide part 112 can cooperate with the first guide rail 211 to have a guiding effect for installation. The first cover 111 is further provided with a first lifting part 114, which is closer to the fourth end 14 than the third end 13 in the second direction. The second end 12 is further provided with a second lifting part 124. The first lifting part 114 and the second lifting part 124 are symmetrically arranged in the first direction and protrude from the cartridge body 10 in the second direction. The first lifting part 114 and the second lifting part 124 can cooperate with the image forming device.

[0056] Further, in other embodiments, the first pushing part, the first guide part 112 and the first lifting part 114 are all arranged on the first cover 111, which is more convenient for installation and disassembly and reduces the cost.

[0057] A bearing portion 121 is disposed at the second end 12. In the second direction, the bearing portion 121 is close to the front side of the cartridge body 10. The bearing portion 121 is provided with a second guide portion 1211 and a cartridge electrode 1212. The second guide portion 1211 can cooperate with the second guide rail 221 on the drum assembly 2, and has the function of guiding installation. In the first direction, the first guide portion 112 and the second guide portion 1211 are symmetrically arranged and cooperate with the first guide rail 211 and the second guide rail 221 on the drum assembly 2, respectively, so that the developing cartridge 1 can be installed in the drum assembly 2 more conveniently. The cartridge electrode 1212 can be electrically connected to the image forming apparatus, thereby supplying power to the developing roller 131, so that the developing cartridge 1 can complete the developing operation.

[0058] In other configurations, the cartridge electrode 1212 may power only the main body of the developing roller 131, without powering the roller shaft, and the roller shaft may not be electrically connected to the main body. Alternatively, the cartridge electrode 1212 may not be electrically connected to the developing roller 131, but only to the powder delivery roller and the powder exit blade 132. The powder delivery blade 132 and the powder delivery roller power the main body of the developing roller 131, without powering the roller shaft, and the roller shaft may not be electrically connected to the main body.

[0059] Furthermore, in this application, the first cover 111 also has protrusions (not shown in the figure) symmetrical to the protrusions 126 on the second end 12. When the developing cartridge 1 and the drum assembly 2 are installed in the image forming apparatus, in order to prevent them from not being installed in place, the symmetrical protrusions can cooperate with the image forming apparatus to install the developing cartridge 1 and the drum assembly 2 in place and be recognized by the image forming apparatus.

[0060] It should be noted that, as Figure 6 , Figure 7 As shown, the image forming apparatus has a door cover 91, on which two rear cover protrusions 911 are provided. The two rear cover protrusions 911 are symmetrically arranged along a first direction. The rear cover protrusions 911 can abut against the first lifting part 114 and the second lifting part 124 respectively, and have the function of lifting the developing cartridge 1. A track 901 is provided on the right side wall 90 of the image forming apparatus. The track 901 is divided into an upper track 902 and a lower track 903. In a third direction, the upper track 902 is located above the lower track 903. The right side wall 90 also has a first recess 905 and a second recess 908. The first recess 905 contains a first electrical contact 906, and the second recess 908 contains a second electrical contact 909. In the second direction, the rear end of the first recess 905 has a first protrusion 904, and the rear end of the second recess 908 has a second protrusion 907. After the developing cartridge 1 and the drum assembly 2 are installed in the image forming apparatus, the cover 90 can be rotated counterclockwise from WA to WB to close, and the image forming apparatus starts to work.

[0061] In other embodiments, the first push portion can be arranged at the protruding portion 126 and the first end 11 (the protrusion on the first cover 111) symmetrical to the protruding portion 126, i.e. after the developing cartridge 1 is installed in the drum assembly 2, without cooperating with the force applying member, the developing cartridge 1 can receive the pushing force applied by the force applying member, or arranged at the second direction close to the fourth end 14 of the cartridge body 10, after the developing cartridge 1 is installed in the drum assembly 2 in the image forming apparatus, cooperating with the rear cover protrusion 911 on the door cover 91 of the image forming apparatus, and then receiving the pushing force applied by the door cover 91 on the developing cartridge 1 when the door cover 91 is closed, so that the developing roller 131 is in contact with the photosensitive drum 23.

[0062] The processing cartridge of the utility model discloses solve the problem of compatible multiple developing cartridge type, make new improvement to developing cartridge 1 and drum assembly 2, specifically:

[0063] The first support 25 is arranged at the first side wall 21 of the drum frame 20, and the first support 25 protrudes from the first side wall 21 in the first direction. In the second direction, the first support 25 is closer to the rear side of the drum frame 20. The first support 25 is provided with a first chip holder 26. The first chip holder 26 is movable relative to the first support 25. The first chip holder 26 is fixedly provided with a first chip 27 at one end in the third direction. The first chip 27 can move with the first chip holder 26 relative to the drum assembly 2. The first chip 27 stores information (first information) of the drum assembly 2. The first chip 27 has a first electrical contact surface 271. When the drum assembly 2 is installed in the image forming apparatus, the first electrical contact surface 271 can be directly electrically connected with the image forming apparatus to transmit the information of the drum assembly 2 to the image forming apparatus. In this embodiment, the first support 25 is further provided with a second chip holder 30. The second chip holder 30 has a second chip 31. The second chip 31 stores corresponding information (second information) of the developing cartridge 1. The second chip 31 is not directly electrically connected with the image forming apparatus. The second chip holder 30 can adopt a plate-shaped structure. The second chip holder 30 is rotatably arranged at the front side wall of the first support 25, i.e. at one end close to the photosensitive drum 23 in the second direction. A rotating shaft 32 is arranged between the first support 25 and the second chip holder 30. The second chip holder 30 can rotate relative to the first support 25 around the rotating shaft 32. An elastic member 33 is sleeved on the rotating shaft 32 to reset the second chip holder 30 after rotation relative to the first support 25. Preferably, in this embodiment, the elastic member 33 is a torsion spring. In other embodiments, the elastic member 33 can also be a spring, as long as it can reset the second chip holder 30 after rotation.

[0064] The developing cartridge 1 further comprises an electric contact part 50 made of electrically conductive material, which is shaped as a bent sheet, and comprises a first electric contact end 501 and a second electric contact end 502, the first electric contact end 501 is used for fixing transmission, and the second electric contact end 502 is used for electrically connecting with the second chip 31. The first end 11 of the cartridge body 10 is further provided with a cover support 113, which is integrally formed with the first cover 111 in the embodiment, and can be separately provided with the first cover 111 in other embodiments. The first electric contact end 501 is fixedly arranged on the cover support 113, and the second electric contact end 502 is arranged in suspension relative to the first electric contact end 501. In the embodiment, the electric contact part 50 is preferably made of elastic metal material, which can transmit electric information.

[0065] In the embodiment, the developing cartridge 1 only needs to be provided with the electric contact part 50 capable of electrically connecting with the image forming device, and does not need to be provided with the chip. When the developing cartridge 1 is installed on the drum assembly 2, the second electric contact end 502 of the first contact part 50 can contact the second chip 31 on the drum assembly 2, and the second chip 31 can transmit information through the first contact part 50. At this time, the second chip holder 30 is in the first position.

[0066] In the process of installing the developing cartridge 1 and the drum assembly 2 on the image forming device, the first chip 27 on the drum assembly 2 needs to pass the first protruding part 904 in the installation direction of the developing cartridge 1 and the drum assembly 2, and then reach the first recess part 905 to contact the first electric contact pin 906, so that the first chip 27 is directly electrically connected with the first electric contact pin 906, and the information of the drum assembly 2 stored in the first chip 27 is transmitted to the image forming device through the first electric contact surface 271. In the process of installing the developing cartridge 1 and the drum assembly 2 on the image forming device, when the first electric contact end 501 of the developing cartridge 1 passes the second protruding part 907 to reach the second recess part 908, the first electric contact end 501 has a certain distance from the second electric contact pin 909 in the third direction before the door cover 91 is closed.

[0067] Specifically, the third chip holder 30 travels along the track past the first recess 905 and the second protrusion 907, finally reaching a position directly opposite the second recess 908 in the third-order direction. The first electrical contact 501 and the second electrical contact pin 909 are directly opposite each other. The first chip 27 on the first support 25 reaches a position directly opposite the first recess 905, and the developing cartridge 1 and drum assembly 2 are fully installed into the image forming apparatus. At this time, the first support 25 abuts against the lower track 903, causing the first electrical contact surface 271 on the first chip 27 to contact the first electrical contact pin 906, allowing the image forming apparatus to recognize the information of the drum assembly 2. At this point, the first electrical contact 501 is positioned directly opposite the second recess 915 in the third-order direction, but still maintains a certain distance from the second electrical contact pin 909 in the third-order direction.

[0068] like Figure 7 As shown, when the developing cartridge 1 and the drum assembly 2 are installed in place, the door cover 91 rotates from WA to WB to close. When the door cover 91 rotates counterclockwise from WA to WB to close, the rear cover protrusion 911 on the door cover 91 abuts against the first lifting part 114 and the second lifting part 124. The door cover 91 abuts against the lifting part through the rear cover protrusion 911, forcing the developing cartridge 1 to move a certain distance relative to the drum assembly 2 in a third direction. As a result, the first electrical contact 501 contacts the second electrical contact pin 909. The second chip 31 located on the second chip holder 30 of the drum assembly 2 is electrically connected to the image forming apparatus through the electrical contact part 50, transmitting the information of the developing cartridge 1 stored in the period to the image forming apparatus, thereby recognizing the developing cartridge and starting the developing operation.

[0069] The first chip 27 is directly electrically connected to the first electrical contact 906, and the second chip 31 is not directly electrically connected to the second electrical contact. In this application, not being directly electrically connected includes the second chip 31 being electrically connected to the second electrical contact through an intermediate part (electrical contact part 50), or the second chip not being electrically connected to the second electrical contact.

[0070] In this application, the first chip 27 and the first electrical contact surface 271 are integrally disposed. In other embodiments, the first chip and the first electrical contact surface 271 are separately disposed, and the first chip 27 is electrically connected to the first electrical contact pin through the separately disposed first electrical contact surface 271, which is also a direct electrical connection.

[0071] When the rear cover protrusion 911 on the door cover 91 abuts against the lifting part, causing the developing cartridge 1 to move relative to the drum assembly 2, if the moving distance is too large, the first electrical contact 501 may interfere with the second protrusion 907. At this time, the first electrical contact 501 will undergo a certain deformation and become bent, so as not to affect the contact between the second electrical contact 502 and the second chip 31.

[0072] like Figure 8 , Figure 9As shown, in another use case of the developing cartridge 1, the developing cartridge 1 itself has a cartridge support 60 supporting the chip, when the drum assembly 2 in this embodiment is installed with the developing cartridge 1 having the chip, at this time, the cartridge support 60 needs to be loaded into the drum assembly 2 along the mounting direction, the cartridge support 60 interferes with the second chip holder 30, the cartridge support 60 forces the second chip holder 30 to rotate relative to the first holder 25 around the rotation shaft 32 to avoid the cartridge support 60, and the elastic member 33 is compressed, when the developing cartridge 1 is installed in place, the second chip holder 30 is in the second position (the cartridge support 60 abuts against the second chip holder 30), that is, in the second direction, the second chip holder 30 is between the cartridge support 60 and the first holder 25. At this time, when the developing cartridge 1 is installed together with the drum assembly 2 in the image forming device, the chip on the cartridge support 60 can be in contact with the second electrical contact pin 909 to achieve electrical connection with the image forming device. When the developing cartridge 1 is dismounted from the drum assembly 2, the cartridge support 60 no longer interferes with the second chip holder 30, at this time the elastic force of the elastic member 33 is released, so that the second chip holder 30 rotates from the second position to the first position (returns to the initial position), that is, the drum assembly 2 in this embodiment can adapt to the developing cartridge 1 having the cartridge support 60 and the chip arranged on the cartridge support 60, and can also adapt to the developing cartridge 1 without the chip and only with the electrical contact part 50, and both can complete the developing work.

[0073] In other embodiments, the second chip holder 30 can be avoided by the rotation shaft 32, for example, a groove (not shown) is formed on the first holder 25, the groove has a depth dimension in the third direction, and the second chip holder 30 is arranged in the groove and can move in the third direction, when the developing cartridge 1 itself has the chip is installed on the drum assembly 2, the cartridge support 60 interferes with the second chip holder 30 and pushes the second chip holder 30 to move downward, which can also achieve the effect of avoiding the developing cartridge 1 having the cartridge support 60, and the elastic member such as a tension spring / spring for resetting is arranged between the second chip holder 30 and the first holder 25, and the specific arrangement is not limited here.

[0074] Among them, after the developing cartridge 1 is installed on the drum assembly 2, the locking part 226 on the drum assembly 2 and the locked part 122 arranged on the cartridge body 10 have a certain spacing, which is marked as D1, similarly, when the developing cartridge 1 and the drum assembly 2 are installed in the image forming device, and the door cover 91 is not closed, the first electrical contact end 501 on the developing cartridge 1 also has a certain spacing between the second electrical contact pin 909 in the third direction, which is marked as D2. Preferably, the spacing between the locking part 226 and the locked part 122 is equal to the spacing between the first electrical contact end 501 and the second electrical contact pin 909, that is, D1=D2.

[0075] Further, the electric contact part 50 has elasticity, and in the embodiment, the distance between the locking part 226 and the locked part 122 can be greater than the distance between the first electric contact end 501 and the second electric contact pin 909, that is, D1>D2. When the door cover 90 is closed, the electric contact part 50 interferes with the second protruding part 907 and deforms, and the distance difference (marked as D) between the distance before deformation and the distance after deformation is equal to the distance difference between D1 and D2, that is, D=D1-D2.

[0076] In the present application, by arranging the second chip holder 30 capable of moving relative to the first support 25 on the drum assembly 2, and arranging the second chip 31 storing the developing cartridge information on the second chip holder 30, the drum assembly 2 can cooperate with the developing cartridge 1 only having the electric contact part 50 to complete the developing work, without the need to arrange the corresponding chip on the developing cartridge 1. Meanwhile, the drum assembly 2 of the embodiment can also adapt to the developing cartridge 1 provided with the cartridge chip on the cartridge body 10. When the developing cartridge 1 is installed on the drum assembly 2, the second chip holder 30 can move relative to the first support 25 to avoid the developing cartridge 1, thereby completing the developing work. The scheme of the embodiment improves the versatility of the drum assembly 2, increases the diversity of the developing cartridge 1, and enables one drum assembly 2 to adapt to different developing cartridges 1.

[0077] Embodiment Two

[0078] In the embodiment, compared with the first embodiment, the second chip holder 30 is not arranged, or the second chip 31 is integrally formed in the drum assembly 2, and the rest of the structure is completely the same as the first embodiment.

[0079] As shown in Figures 10-12 In the embodiment, a groove (not marked in the figure) capable of accommodating the second chip 31 is arranged on the side (front side) of the first support 25 close to the photosensitive drum 23 in the second direction, and the second chip 31 is fixedly installed on the first support 25 through the groove. The groove can also not be arranged, and the second chip 31 is directly pasted and fixed on the side (front side) of the first support 25 facing the photosensitive drum 23 in the second direction.

[0080] In the present embodiment, the distance (labeled as X1) between the first support 25 and the third support 113 on the side of the photosensitive drum 23 in the second direction is less than the distance (labeled as X2) between the second electrical contact 502 and the third support 113 in the second direction, i.e., X1 is less than X2, so that when the developing cartridge 1 of the present embodiment is installed in the drum assembly 2, in order to make the second electrical contact 502 contact the second chip 31, the electrical contact portion 50 is forced to be bent and deformed elastically, making the contact between the second electrical contact 502 and the second chip 31 more stable. At the same time, when the door cover 91 is closed, the developing cartridge 1 moves a certain distance relative to the drum assembly 2, so that the first electrical contact 501 contacts the second electrical contact 909. At this time, the electrical contact portion 50 elastically recovers a certain distance and is still in a bent state, the contact between the second electrical contact 502 and the second chip 31 is stable and will not be disconnected, avoiding the problem of unstable or inaccurate recognition.

[0081] Further, in the present embodiment, the electrical contact portion 50 is made of a material that has a certain elasticity and can transmit electrical signals. In the second direction, the distance of the electrical contact portion 50 is longer than the distance between the first support 25 and the third support 113, so that when the developing cartridge 1 is installed in the drum assembly 2, the electrical contact portion 50 is pressed to deform elastically and will not easily fall off and cause a broken contact.

[0082] Further, in the present embodiment, the second chip 31 is arranged by setting a groove on the second chip support 25, i.e., the second chip 31 is attached to the second chip support 25. Compared with the first embodiment, the drum assembly 2 does not need to set a second chip support 30 to avoid being able to adapt to the developing cartridge 1 with a chip, i.e., when the developing cartridge 1 with the cartridge support 60 is installed in the drum assembly 2, by setting the second chip 31 in the groove, the cartridge support 60 can be directly avoided, so that the installation of the developing cartridge 1 is not affected, and the chip of the developing cartridge 1 can be normally electrically connected and recognized by the image forming apparatus.

[0083] Further, by setting the distance between the side of the first support 25 close to the photosensitive drum 23 in the second direction to the third support 113 smaller than the distance between the second electrical contact end 502 to the third support 113 in the second direction, when the developing cartridge 1 is installed in the drum assembly 2, the second electrical contact end 502 contacts the second chip 31, and the first contact portion 50 is bent and deformed by the elastic force, and the second electrical contact end 502 stably contacts the second chip 31. At the same time, in order to prevent the developing cartridge 1 from moving a certain distance relative to the drum assembly 2 when the door cover 91 is closed, so that the electrical contact portion 50 is no longer bent and deformed, thereby affecting the contact effect of the second electrical contact end 502 and the second chip 31, in the embodiment, the bending and deforming amount of the first contact portion 50 is greater than the restoring amount of the door cover 91 when lifting the developing cartridge 1, that is, the door cover 91 will not make the electrical contact portion 50 completely restore when lifting the developing cartridge 1, and when the door cover 91 is closed, the first electrical contact end 501 contacts the second electrical contact pin 909, at this time, the electrical contact portion 50 is still in the state of elastic deformation, and the second electrical contact end 502 still stably contacts the second chip 31.

[0084] In the present application, by opening a groove structure on the first support 25 of the drum assembly 2, the second chip 31 storing the information of the developing cartridge 1 is fixedly arranged in the opened groove, and the second chip holder is cancelled, so that the drum assembly 2 can cooperate with the developing cartridge 1 only having the electrical contact portion 50 to complete the developing work, without the need to arrange the cartridge chip on the developing cartridge 1. At the same time, the drum assembly 2 of the embodiment can also adapt to the developing cartridge 1 provided with the cartridge chip on the cartridge body 10, and can be installed and completed without avoiding to perform the developing work. The scheme of the embodiment improves the versatility of the drum assembly 2, increases the diversity of the developing cartridge 1, so that one drum assembly 2 can adapt to different developing cartridges 1, and further reduces the manufacturing cost of the drum assembly 2 and simplifies the structure of the drum assembly 2.

[0085] Embodiment Three

[0086] Compared with Embodiment Two, the second chip 31 in the present embodiment is not arranged on the first support 25, but is arranged at other positions in the drum assembly 2, and the rest is the same as Embodiment Two.

[0087] As Figure 13 , Figure 14As shown, in the third direction, the second chip 31 storing the developing cartridge 1 information is arranged at the bottom (lower side, the side away from the first chip 27) of the drum frame 20, specifically, in the second direction, the second chip 31 is arranged at the rear side of the first force applying member 214, and in the first direction, the second chip 31 is closer to the second side wall 22 than the first chip 27, specifically, the second chip 31 is located at the inner side of the first side wall 21, and the first chip 27 is located at the outer side of the first side wall 21. The electrical contact portion 50 on the developing cartridge 1 extends and is attached to the first cover 111.

[0088] When the developing cartridge 1 is installed to the drum assembly 2, the second electrical contact end 502 will be elastically deformed when in contact with the second chip 31, which prevents the developing cartridge 1 from moving relative to the drum assembly 2 when the door cover 91 is closed, avoiding the second electrical contact end 502 from being out of contact with the second chip 31, and the specific principle is the same as that of Embodiment Two, which will not be repeated here.

[0089] In the present embodiment, the second chip 31 is arranged at the bottom of the drum frame 20, which does not affect the compatibility of the drum assembly 2 with the developing cartridge 1 with a chip.

[0090] In other embodiments, the second chip 31 can also be arranged at other positions of the drum frame 20, such as being arranged on the first side wall 21 of the drum frame 20, being arranged at the position close to the paper inlet 29 of the drum frame 20, or other positions, as long as it does not affect the normal installation of the developing cartridge 1 and ensures that the electrical contact portion 50 can be in contact with the second electrical contact pin 909, and at the same time, it does not affect the compatibility of the drum assembly 2 with the developing cartridge 1 with a chip, which will not be limited here.

[0091] In the present embodiment, by arranging the cartridge chip at the bottom of the drum frame 20 instead of on the second chip holder 30, the drum assembly 2 can be matched with the developing cartridge 1 with only the electrical contact portion 50 to complete the developing work, without the need to arrange the cartridge chip on the developing cartridge 1. At the same time, the drum assembly 2 of the present embodiment can also be adapted to the developing cartridge 1 with the cartridge chip arranged on the cartridge body 10, and can be installed without avoiding to complete the developing work. The scheme of the present embodiment improves the versatility of the drum assembly 2, increases the diversity of the developing cartridge 1, makes one drum assembly 2 adapt to different developing cartridges 1, and further reduces the manufacturing cost of the drum assembly 2 and simplifies the structure of the drum assembly 2.

[0092] In other embodiments, a developing cartridge is provided, a cartridge holder 60 can be arranged on the developing cartridge 1, and a tool component for taking out the cartridge chip is attached to the packaging box when the product is sold. After the user receives the new developing cartridge, the tool component for taking out the cartridge chip attached to the packaging box is used to dismount the chip on the old developing cartridge which has been used by the customer, and install the chip on the newly purchased developing cartridge which does not have the chip but has the chip holder, and install the developing cartridge on the drum assembly, so that the same can be used.

[0093] The above is only a preferred embodiment of the present application, in order to make the description simple, all possible combinations of each technical feature in the above embodiment are not described, and the present application is not limited in any form. Any modification, equivalent change and modification of the above embodiment according to the technical essence of the present application, which does not deviate from the technical scheme content of the present application, still belongs to the scope of the technical scheme of the present application.

Claims

1. A drum assembly capable of detachably accommodating a developing cartridge, the drum assembly and the developing cartridge being capable of being detachably installed together in an image forming apparatus, the image forming apparatus having a first electrical contact pin and a second electrical contact pin, characterized in that, The drum assembly comprises: a drum frame having a first side wall and a second side wall in a first direction; a photosensitive drum rotating around an axis extending in the first direction; a first chip disposed on the first side wall, the first chip storing information of the drum assembly, the first chip being directly electrically connected with the first electrical contact pin; a second chip disposed on the first side wall, the second chip storing information of the developing cartridge, the second chip not being directly electrically connected with the second electrical contact pin.

2. The drum assembly of claim 1, wherein, A second chip holder is movably disposed on the first side wall, the second chip is disposed on the second chip holder, and the second chip holder is forced to move relative to the drum frame together with the second chip.

3. The drum assembly of claim 2, wherein, A first bracket is disposed on the first side wall, and the second chip holder is movably disposed on the first bracket. An elastic member is disposed between the second chip holder and the first bracket, and the elastic member resets the second chip holder after the second chip holder is moved.

4. The drum assembly of claim 3, wherein, A pivot is further disposed between the second chip holder and the first bracket, and the elastic member is disposed on the pivot. The second chip holder rotates relative to the first bracket through the pivot.

5. The drum assembly of claim 1, wherein, The first side wall is provided with a first bracket, and the second chip is fixedly disposed on a side of the first bracket facing the photosensitive drum in a second direction, the second direction being orthogonal to the first direction.

6. The drum assembly of claim 5, wherein, A recess is formed on a side of the first bracket close to the photosensitive drum in the second direction, and the second chip is fixedly installed in the recess.

7. The drum assembly of claim 1, wherein The second chip is disposed on a side of the drum frame away from the first chip in a third direction. In the first direction, the second chip is closer to the second side wall than the first chip, and the first direction is orthogonal to the third direction.

8. The drum assembly of claim 1, wherein, The first chip is movable relative to the drum frame.

9. The drum assembly of claim 1, wherein, The developing cartridge comprises a cartridge bracket, and a cartridge chip is disposed on the cartridge bracket. When the developing cartridge is installed on the drum assembly and installed on the image forming device together with the drum assembly, the second chip is not electrically connected with the second electrical contact pin, and the cartridge chip is electrically connected with the second electrical contact pin.

10. A developing cartridge, characterized by, The developing cartridge is detachably installed on the drum assembly of any one of claims 1-8, and the developing cartridge comprises: a cartridge body for accommodating a developer, the cartridge body having a first end and a second end in a first direction; a developing roller rotatable around an axis extending in the first direction; an electrical contact portion disposed on the first end; When the developing cartridge is installed on the drum assembly, the electrical contact portion is electrically connected with the second chip.

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