Developing box and drum assembly

Abstract

A developing cartridge and a drum assembly wherein the developing cartridge comprises: a cartridge body for storing a developer; the developing roller is rotatably arranged on the box body in the first direction, and in the second direction, the developing roller is closer to the third end than the fourth end; the power receiving part is located at the first end of the box body, and the power receiving part is used for receiving power output by the image forming device; the second chip frame is arranged at the first end of the box body; the second chip is used for storing information of the developing box; a second electrical contact surface, the second electrical contact surface is electrically connected with the chip, and the second electrical contact surface is detachably arranged on the second chip frame; when the developing box is mounted on the drum assembly, the forcible pushing assembly enables the developing roller and the photosensitive drum to have acting force facing each other so as to be attached to each other; and the electrode is used for supplying power to the developing roller, and the electrode is positioned at the second end.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic imaging, and particularly relates to a developing cartridge and a drum unit. Background Art

[0002] A developing cartridge is a detachable part widely used in an image forming apparatus. The developing cartridge can be installed on a drum unit and then installed on the image forming apparatus together with the drum unit. When the developing cartridge and the drum unit are working, it is required that the developing roller on the developing cartridge is closely attached to the photosensitive drum on the drum unit. In the prior art, there are often cases where the developing roller and the drum unit are not well attached, resulting in unstable developing work. Therefore, it is necessary to provide a developing cartridge and a drum unit that can operate stably. Summary of the Utility Model

[0003] According to one aspect of the present utility model, there is provided a developing cartridge that can be detachably installed on a drum unit and can be detachably installed on an image forming apparatus. The drum unit includes a photosensitive drum. The developing cartridge includes:

[0004] A cartridge body for storing a developer. The cartridge body has a first end and a second end oppositely arranged in a first direction, a third end and a fourth end oppositely arranged in a second direction, and a fifth end and a sixth end oppositely arranged in a third direction;

[0005] A developing roller rotatably arranged on the cartridge body along the first direction. In the second direction, the developing roller is closer to the third end than the fourth end;

[0006] A power receiving portion located at the first end of the cartridge body. The power receiving portion is used for receiving the power output by the image forming apparatus;

[0007] A second chip frame arranged at the first end of the cartridge body;

[0008] A second chip for storing information of the developing cartridge;

[0009] A second electrical contact surface electrically connected to the chip. The second electrical contact surface is detachably arranged on the second chip frame;

[0010] A pressing assembly. When the developing cartridge is installed on the drum unit, the pressing assembly enables the developing roller and the photosensitive drum to have a force towards each other and thus be attached; and

[0011] An electrode for supplying power to the developing roller. The electrode is located at the second end.

[0012] By setting the pressing assembly, the present utility model enables the developing roller and the photosensitive drum to be closely attached, ensuring the stable operation of the developing cartridge and the drum unit.

[0013] In some embodiments, the pushing component includes a first pusher. The first pusher includes a first force - applying portion disposed on the second chip frame and a first elastic member connected between the second chip frame and the first force - applying portion. When the developing cartridge is mounted to the drum assembly, the first force - applying portion abuts against a first force - receiving surface on the drum assembly, thereby compressing the first elastic member. Under the action of the first elastic member, the developing roller and the photosensitive drum are brought into contact with each other.

[0014] In some embodiments, the drum assembly includes a first chip frame, and the first force - receiving surface is disposed on the first chip frame.

[0015] In some embodiments, the developing cartridge further includes a stirring gear. In a second direction, the first force - applying portion is located outside the rotation axes of the power - receiving portion and the stirring gear.

[0016] In some embodiments, the first force - applying portion is farther from the developing roller than the second chip frame in the second direction.

[0017] In some embodiments, the pushing component includes a third pusher. The third pusher includes a third force - applying portion disposed at the second end of the cartridge body and a third elastic member connected to the third force - applying portion. When the developing cartridge is mounted to the drum assembly, the third force - applying portion abuts against the drum assembly, thereby compressing the third elastic member. Under the action of the third elastic member, the developing roller and the photosensitive drum are brought into contact with each other.

[0018] In some embodiments, a concave platform is provided at the second end of the developing cartridge. A first accommodating portion is provided in the concave platform, and the third elastic member is disposed between the first accommodating portion and the third force - applying portion.

[0019] In some embodiments, the developing cartridge further includes a stirring gear. The third force - applying portion is closer to the developing roller than the second chip frame in the second direction, and the third force - applying portion is located inside the rotation axes of the power - receiving portion and the stirring gear.

[0020] In some embodiments, the developing cartridge further includes a locking portion. The locking portion is provided at the first end of the cartridge body. When the developing cartridge is mounted to the drum assembly, the locking portion cooperates with the drum assembly so that the developing cartridge is fixedly mounted on the drum assembly.

[0021] In some embodiments, the locking portion includes a clamping portion. The clamping portion includes a connecting arm extending in a third direction and an abutting portion connected to the end of the connecting arm in the extending direction. The abutting portion is used to be embedded in a clamping recess of the drum assembly so that the developing cartridge and the drum assembly are clamped and fixed.

[0022] In some embodiments, there are multiple clamping portions and multiple clamping recesses. The clamping portions are in one - to - one correspondence with the clamping recesses to clamp and fix the developing cartridge and the drum assembly.

[0023] In some embodiments, the drum assembly includes a first chip frame, and the locking portion includes a snap portion for snap-fixing with the first chip frame.

[0024] In some embodiments, the snap portion is formed with a catch at the bottom in the third direction, and the catch is used for snap-fixing with the first chip frame.

[0025] In some embodiments, the locking portion is farther from the developing roller than the second chip frame in the second direction. The developing cartridge further includes a stirring gear, and the snap portion is located outside the rotation axes of the power receiving portion and the stirring gear.

[0026] In some embodiments, a first chip frame is further provided at the first end of the cartridge body, and a first chip is detachably provided on the first chip frame for storing information of the drum assembly.

[0027] In some embodiments, the first chip frame is farther from the developing roller than the second chip frame in the second direction.

[0028] The present utility model further provides a drum assembly for detachably mounting a developing cartridge and capable of being detachably mounted on an image forming apparatus. The image forming apparatus is provided with a track on which a first protrusion, a first electrical contact pin, a second protrusion, and a second electrical contact pin are sequentially provided. The developing cartridge includes a second chip for storing information of the developing cartridge. The drum assembly includes:

[0029] A frame;

[0030] A first chip for storing information of the drum assembly; and

[0031] An elastic component provided on the frame. When the developing cartridge and the drum assembly are mounted on the track of the image forming apparatus, when the first chip receives a downward pressing force applied by the first protrusion and / or the second chip receives a downward pressing force applied by the second protrusion, the developing cartridge and the drum assembly move downward together in the third direction. The elastic component abuts against the bottom wall of the image forming apparatus and is compressed. After the first chip passes over the first protrusion and / or the second chip passes over the second protrusion, the elastic component is released, so that the developing cartridge and the drum assembly move upward together in the third direction, thereby bringing the first chip into contact with the first electrical contact pin and / or the second chip into contact with the second electrical contact pin.

[0032] In some embodiments, the frame includes a first wall and a second wall opposite to each other in the first direction, and a third wall connecting the first wall and the second wall; the elastic component is provided on the third wall;

[0033] The elastic component includes a mounting portion, a movable member, and an elastic member. The mounting portion is fixedly provided on the third wall, the movable member is connected to the mounting portion through the elastic member, and the movable member is used for abutting against the bottom wall of the image forming apparatus.

[0034] The present utility model further provides a drum assembly, which is used for detachably mounting a developing cartridge and can be detachably mounted on an image forming apparatus. The drum assembly includes:

[0035] A frame, which includes a first wall and a second wall opposite to each other in a first direction, and a third wall connecting the first wall and the second wall;

[0036] A first chip frame, which is detachably disposed on the first wall, and a first chip for storing information of the drum assembly is provided on the first chip frame; and

[0037] A second chip frame, which is detachably disposed on the first wall, and a second chip for storing information of the developing cartridge is provided on the second chip frame. Description of the Drawings

[0038] Figure 1 is a schematic structural diagram of the developing cartridge in the first embodiment;

[0039] Figure 2 is a schematic structural diagram of the developing cartridge with the cover at the first end hidden in the first embodiment;

[0040] Figure 3 is an exploded structural diagram of the transmission assembly at the first end of the developing cartridge in the first embodiment;

[0041] Figure 4 is a schematic structural diagram of the drum assembly in the first embodiment;

[0042] Figure 5 is a schematic structural diagram of the developing cartridge with a cover at the first end in the first embodiment;

[0043] Figure 6 is an exploded schematic diagram of the chip frame at the first end of the developing cartridge in the first embodiment;

[0044] Figure 7 is a schematic diagram of the first end of the cooperation between the developing cartridge and the drum assembly in the first embodiment;

[0045] Figure 8 is a schematic structural diagram of the second end of the developing cartridge in the first implementation manner in the first embodiment;

[0046] Figure 9 is a schematic structural diagram of the cooperation between the second end of the developing cartridge and the drum assembly in the first implementation manner in the first embodiment;

[0047] Figure 10 is a schematic structural diagram of the second end of the developing cartridge in the second implementation manner in the first embodiment;

[0048] Figure 11 is an exploded structural diagram of the force application part on the second end of the developing cartridge in the second implementation manner in the first embodiment;

[0049] Figure 12 It is a schematic cross-sectional view of the second end of the developing cartridge cooperating with the drum assembly in the second implementation manner of Embodiment 1;

[0050] Figure 13 It is a schematic structural view of the drum assembly in Embodiment 2;

[0051] Figure 14 It is an exploded schematic view of the elastic component in Embodiment 2;

[0052] Figure 15 It is a simplified schematic view of the developing cartridge installed in the drum assembly and abutting against the bottom of the image forming apparatus in Embodiment 2;

[0053] Figure 16 It is a schematic structural view of the developing cartridge and the drum assembly cooperating and installed in the image forming apparatus in Embodiment 2;

[0054] Figure 17 It is a schematic structural view of the developing cartridge and the drum assembly cooperating and completing with the image forming apparatus in Embodiment 2;

[0055] Figure 18 It is a schematic structural view of the fourth end of the developing cartridge in Embodiment 3;

[0056] Figure 19 It is Figure 18 An enlarged front view of B in

[0057] Figure 20 It is a schematic structural view of the drum assembly in Embodiment 3;

[0058] Figure 21 It is a schematic view of the cooperating structure of the developing cartridge and the drum assembly in Embodiment 3;

[0059] Figure 22 It is a schematic structural view of the first end of the developing cartridge in Embodiment 4;

[0060] Figure 23 It is a schematic view of the structure of the first end of the cooperating developing cartridge and drum assembly in Embodiment 4;

[0061] Figure 24 It is Figure 23 An enlarged view of the structure of C in

[0062] Figure 25 It is a schematic structural view of the drum assembly in Embodiment 5;

[0063] Figure 26 It is a schematic structural view of the developing cartridge in Embodiment 5;

[0064] In the figure:

[0065] 1. Developing cartridge; 10. Cartridge body; 11. First end; 12. Second end; 13. Third end; 14. Fourth end; 15. Fifth end; 16. Sixth end; 17. Clamping portion; 171. Connecting arm; 172. Clamping surface; 173. Abutting portion; 18. Buckling portion; 181. Buckling surface; 19. Protective cover; 121. Electrode; 122. Second stress-receiving portion; 1221. Second stress-receiving surface; 123. Powder filling port; 124. Concave platform; 125. First accommodating portion; 1251. Third card slot; 126. Third elastic member; 127. Third stress-applying portion; 1271. Third stress-applying surface; 1272. Third clamping claw; 131. Developing roller; 141. Handle; 31. First clamping recess; 311. First surface to be clamped; 32. Second clamping recess; 33. Third clamping recess; 40. Power receiving portion; 41. Powder feeding gear; 42. Developing gear; 431. Large-diameter driving gear; 432. Small-diameter driving gear; 44. Idler gear; 45. Stirring gear; 47. Second chip frame; 471. First card slot; 472. Protrusion; 48. First elastic member; 49. First stress-applying portion; 491. First stress-applying surface; 492. First clamping claw; 50. Second chip holder; 60. Second chip; 21. First wall; 22. Second wall; 230. Third wall; 28. Mounting portion; 281. Fixed column; 282. Guiding portion; 29. Movable member; 291. Abutting portion; 292. Guiding portion; 30. Compression spring 90. Bottom wall; 91. Side wall; 92. First electrical contact pin; 93. Second electrical contact pin; 94. First protrusion; 95. Second protrusion; 96. Track; 961. Upper track; 962. Lower track. Detailed implementation mode

[0066] The following further describes the present utility model in detail with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0067] It should be noted that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0068] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0069] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0070] In the above description, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0071] As Figures 1 - 4 shown, this embodiment provides a developing cartridge 1, and the developing cartridge can be detachably installed on the drum unit 2.

[0072] As Figure 1As shown, the developing cartridge 1 has a cartridge body 10. The cartridge body 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, and a fifth end 15 and a sixth end 16 in a third direction. The developing cartridge 1 further has a developing roller 131 which can rotate about an axis parallel to the first direction. In the second direction, the developing roller 131 is closer to the third end 13 than to the fourth end 14. In the third direction, the developing roller 131 is closer to the fifth end 15 than to the sixth end 16. It should be noted that in this specification, the two expressions of the first end 11 of the cartridge body 10 and the first end 11 of the developing cartridge 1 are not distinguished. When stating that a certain component is provided at the first end 11 of the cartridge body 10 or the first end 11 of the developing cartridge 1, it includes both the case where the component is directly provided at the first end 11 of the cartridge body 10 and the case where the component is provided on the cover 19 located at the first end 11 of the cartridge body 10.

[0073] 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). The developing roller 131, the stirring frame and the powder feeding roller are all rotatably installed in the accommodating cavity 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 along the first direction. The powder feeding roller is disposed adjacent to the developing roller 131, and in the second direction, the developing roller 131 is closer to the third end 13 of the cartridge body 1 than the powder feeding roller. The stirring frame is used to stir the developer in the accommodating cavity to cause friction of the developer and prevent the developer from caking.

[0074] As Figure 2 and Figure 3 As shown, the transmission assembly is disposed at the first end 11 of the cartridge body 1. The transmission assembly includes a driving part rotatably installed on the first end 11 of the cartridge body 1, and the rotation axis of the driving part is parallel to the first direction. The driving part includes a driving gear and a power receiving part 40 integrally formed coaxially. The driving gear is closer to the first end 11 of the cartridge body 1 than the power receiving part 40 in the first direction. The driving gear includes a large-diameter driving gear 431 and a small-diameter driving gear 432. In the first direction, the large-diameter driving gear 431 is closer to the first end 11 than the small-diameter driving gear 432. The power receiving part 40 is used to be coupled with the power output shaft on the image forming device to receive the power output by the image forming device.

[0075] The transmission assembly further includes a developing gear 42, a powder feeding gear 41, an idler gear 44, and a stirring gear 45. The developing gear 42 is coaxially and fixedly installed at one end of the developing roller 131 close to the first end 11 of the cartridge 1. The powder feeding gear 41 is coaxially and fixedly installed at one end of the powder feeding roller close to the first end 11 of the cartridge 1. The stirring gear 45 is coaxially and fixedly installed at one end of the stirring frame close to the first end 11 of the cartridge 1. The idler gear 44 is rotatably installed at the first end 11 of the cartridge 1. After the power receiving part 40 receives the output power of the image formation, it can transmit the power to each gear of the transmission assembly through the driving gear and make them rotate.

[0076] As Figure 4 shown, the drum assembly 2 includes a frame 20, a first chip frame 23, a first chip holder 24, a first chip 25, and a photosensitive drum (not shown). Among them, the frame 20 includes a first wall 21, a second wall 22, and a third wall 230 connecting the first wall 21 and the second wall 22. The photosensitive drum is rotatably supported by the frame 20. In the state where the developing cartridge 1 is installed on the drum assembly 2, the frame 20 carries the developing cartridge 1. The first wall 21 and the second wall 22 are oppositely arranged in the first direction. The first chip frame 23 is arranged on the first wall 21. A movable first chip holder 24 is arranged between the first chip frame 23 and the first wall 21. A first chip 25 and a first electrical contact surface are arranged on one side of the first chip holder 24 in the third direction. The first electrical contact surface is electrically connected to the first chip 25. The first electrical contact surface is used to contact a first terminal in the image forming apparatus so that the image forming apparatus can read the information in the first chip 25. In this embodiment, the first electrical contact surface is fixedly arranged on the first chip. In other embodiments, the first chip and the first electrical contact surface can also be respectively arranged at different positions of the drum assembly and electrically connected through a conductive member such as a wire. In this case, only the first electrical contact surface needs to be arranged on the first chip frame 23. The first chip frame 23 is arranged away from the photosensitive drum in the second direction. A first force receiving surface 231 is provided on the side of the first chip frame 23 close to the photosensitive drum.

[0077] A third force receiving part 26 or a second force applying part 27 is further arranged at a position where the drum assembly 2 is close to the second wall 22 in the first direction. The third force receiving part 26 is arranged farther away from the photosensitive drum than the second force applying part 27 in the second direction. The second force applying part 27 is closer to the second wall 22 than the third force receiving part 26. Both the third force receiving part 26 and the second force applying part 27 have a third force receiving surface 261 and a second force applying surface 271 on the side facing the photosensitive drum. The third force receiving part 26 and the second force applying part 27 can be arranged on the drum assembly 2 simultaneously or singly. The developing cartridge 1 in which the second force receiving part 122 cooperates with the second force applying part 27 is the first implementation manner of the first embodiment. The developing cartridge 1 in which the third force applying part 127 cooperates with the third force receiving part 26 is the second implementation manner of the second embodiment.

[0078]

The First Embodiment of the First Implementation Mode of the First Embodiment

[0079] As shown in Figures 4 - 8 , the pushing component of the first implementation mode of the first embodiment. The developing cartridge includes a first pusher and a second pusher. The pushing component is configured to receive the pushing force applied by the drum component 2 so that the developing roller 131 is in close contact with the photosensitive drum.

[0080] As shown in Figures 6 - 7 , the first pusher includes a first force-applying portion 49, and the first force-applying portion 49 is arranged to act on the first force-receiving surface 231 on the drum component 2. A second chip frame 47 is provided on the cover 19. A second chip bracket 50 is provided between the second chip frame 47 and the cover 19. A second chip 60 and a second electrical contact surface are provided at the end of the second chip bracket 50 close to one side surface in the third direction. The second electrical contact surface is electrically connected to the second chip 60. The second electrical contact surface is used to contact a second terminal in the image forming apparatus so that the image forming apparatus can read the information in the second chip. In this embodiment, the second electrical contact surface is fixedly arranged on the second chip. In other embodiments, the second chip and the second electrical contact surface can also be respectively arranged at different positions of the cartridge body and electrically connected through a conductive member such as a wire. In this case, only the second electrical contact surface needs to be arranged on the second chip bracket 50. The second chip 60 can be fixed on the second chip bracket 50 by a snap connection method or by an adhesive bonding method. On the side of the second chip frame 47 away from the developing roller 131 in the second direction, a first elastic member 48 and a first force-applying portion 49 are provided. A first concave portion is provided on the side of the second chip frame 47 away from the developing roller 131 in the second direction. The first concave portion can be used to accommodate the first elastic member 48 and the first force-applying portion 49. A protrusion 472 is provided on the side of the first concave portion close to the developing roller 131 for fixing the first elastic member 48. A first card slot 471 is provided on the side wall of the first concave portion. A first claw 492 is provided on the first force-receiving portion 49. The first force-applying portion 49 further has a first force-applying surface 491. When the first elastic member 48 and the first force-applying portion 49 cooperate with the first concave portion on the second chip frame 47, the first claw 492 cooperates with the first card slot 471, so that the first force-applying portion 49 can move along the second direction in the first concave portion, and further the first elastic member 48 can be compressed in the first concave portion, and it can also prevent the first force-applying portion 49 from separating from the first concave portion.

[0081] As shown in Figure 5 , Figure 6As shown, the first end 11 of the first embodiment cooperates with the first wall 21. The first force - applying portion 49 is provided on the side of the second chip frame 47 away from the developing roller 131 in the second direction. The first force - receiving surface 231 is provided on the side of the first chip frame 23 close to the photosensitive drum in the second direction, and the first force - receiving surface 231 is located outside the rotation axes of the power - receiving portion 40 and the stirring gear 45 in the second direction, that is, in the second direction, the first force - receiving surface 231 is not located between the rotation axes of the power - receiving portion 40 and the stirring gear 45. When the developing cartridge 1 is installed in the drum assembly 2, the first force - applying surface 491 abuts against the first force - receiving surface 231, and the first force - applying portion 49 moves in the direction of the developing roller 131 along the first card slot 47 in the second direction, compressing the first elastic member 48, so that the first elastic member 48 generates a force on the developing cartridge 1 in the same direction as the movement direction of the first force - applying portion 49.

[0082] As Figure 8 shown, an electrode 121 and a powder filling port 123 are further provided on the second end 12. The electrode 121 protrudes outward relative to the second end 12 in the first direction. The electrode 121 is electrically connected to the developing roller 131 and the powder feeding roller. The electrode 121 can contact the power - supply portion of the image - forming device to receive the electric energy output from the image - forming device and transmit the electric energy to the developing roller 131 and the powder feeding roller. In some embodiments, the electrode 121 can also be electrically connected to only one of the developing roller 131 or the powder feeding roller. The developing roller 131 includes a developing roller shaft made of a conductive material and a developing roller main body fixedly connected and surrounding the circumferential surface of the developing roller shaft and electrically connected to the developing roller shaft. In some embodiments, the electrode 131 can directly contact and be electrically connected to the developing roller shaft to supply power to the developing roller 131. In some embodiments, the developing roller shaft can also be made of an insulating material or an insulating material is coated on the surface of the developing roller shaft to block the electrical connection between the developing roller shaft and the developing roller main body. In this case, the electrode 131 can be arranged to be electrically connected to the developing roller main body without being electrically connected to the developing roller shaft, and can also supply power to the developing roller 131.

[0083] The powder filling port 123 penetrates the second end 12 in the first direction. The powder filling port 123 is used to allow the developer to enter the cartridge body 10. The powder filling port is provided with a matching cover for sealing the powder filling port 123 to prevent the developer in the cartridge body 10 from leaking. The fourth end 14 also has a handle 141, and the user can pick up the developing cartridge 1 by holding the handle 141.

[0084] The second urging member includes a second force - receiving portion 122 for acting with the second force - applying portion 27 on the drum assembly 2 (see Figure 4 and Figure 9 ), the second force - receiving portion 122 is provided on the second end 12, the second force - receiving portion 122 protrudes from the second end 12, and a second force - receiving surface 1221 is provided on the side of the second force - receiving portion 122 close to the electrode 121.

[0085] As shown Figure 9 in the figure, after the developing cartridge 1 is installed on the drum unit 2, the second force-receiving surface 1221 on the second force-receiving portion 122 can abut against the second force-applying surface 271 on the second force-applying portion 27 on the drum unit 2, and the second force-applying portion 27 generates a force on the developing cartridge 1 to approach the photosensitive drum along the second direction through a second elastic member (not shown in the figure).

[0086] The first force-receiving surface 231 is provided on the drum unit 2, and the second force-receiving portion 122 is provided on the developing cartridge 1. When the developing cartridge 1 is engaged with the drum unit 2, in the third direction, the first force-receiving surface 231 is closer to the fifth end 15 than the second force-receiving portion 122, and in the second direction, the first force-receiving surface 231 is farther from the developing roller 131 (or farther from the photosensitive drum) than the second force-receiving portion 122. The first force-applying portion 49 is provided on the developing cartridge 1, and the second force-applying portion 27 is provided on the drum unit 2. When the developing cartridge 1 is engaged with the drum unit 2, in the third direction, the first force-applying portion 49 is closer to the fifth end 15 than the second force-applying portion 27, and in the second direction, the first force-applying portion 49 is farther from the developing roller 131 (or farther from the photosensitive drum) than the second force-applying portion 27.

[0087] In this embodiment, in the second direction, the first force-applying portion is located outside the rotation axis of the power-receiving portion and the rotation axis of the stirring gear. The first force-applying portion is farther from the developing roller than the second chip frame in the second direction.

[0088] When the developing cartridge 1 is installed and engaged with the drum unit 2, the first force-applying portion 49 of the first pushing member on the developing cartridge 1 abuts against the first force-receiving surface 231 of the drum unit 2, and the second force-applying portion 27 of the second pushing member of the drum unit 2 abuts against the second force-receiving portion 122, applying a force on the developing cartridge 1 in the installation direction, so that the developing roller 131 is in close contact with the photosensitive drum.

[0089]

The second implementation manner of the first embodiment

[0090] Compared with the first implementation manner of the first embodiment, the difference in the second implementation manner is that at the second end 12, the developing cartridge 1 is provided with a third force-applying portion 127, and the drum unit 2 has a third force-receiving portion 26, replacing the second force-applying portion 27 and the second force-receiving portion 122 in the first implementation manner of the first embodiment, and the remaining structures are the same as those of the first implementation manner of the first embodiment.

[0091] As shown Figures 10 - 12 in the figure, the pushing assembly of the second implementation manner of the first embodiment includes a first pushing member and a third pushing member, and the pushing assembly is used to receive the pushing force applied by the drum unit 2 so that the developing roller 131 and the photosensitive drum are in close contact.

[0092] The third urging member includes a third biasing portion 127 for acting on the third receiving portion 26. The second end 12 is provided with a concave portion 124. The concave portion 124 is away from the developing roller 131 in the third direction and close to the fourth end 14. A first receiving portion 125 is provided in the concave portion 124. A third elastic member 126 and a third biasing portion 127 are provided in the first receiving portion 125. The first receiving portion 125 has a second concave portion on the side away from the developing roller 131. A second protrusion (not shown in the figure) is provided on the side of the second concave portion close to the developing roller 131 for fixing the third elastic member 126. The side wall of the second concave portion has a third card slot 1251. A third claw 1272 is provided on the third receiving portion 127. The third biasing portion 127 further has a third biasing surface 1271 provided on the side of the third biasing portion 127 away from the developing roller 131 in the second direction. When the third elastic member 126 and the third biasing portion 127 cooperate with the concave portion on the first receiving portion 125, the third claw 1272 cooperates with the third card slot 1251, so that the third biasing portion 127 can move in the second direction within the concave portion, thereby enabling the third elastic member 126 to be compressed and also preventing the third biasing portion 127 from separating from the concave portion.

[0093] After the developing cartridge 1 is installed on the drum unit 2, the third biasing surface 261 on the third receiving portion 26 of the drum unit 2 can be abutted by the third biasing surface 1271 on the third biasing portion 127 of the developing cartridge 1. The third biasing portion 127 generates a force on the developing cartridge 1 in the second direction close to the photosensitive drum through the third elastic member 126.

[0094] In the third direction, the first biasing portion 49 is closer to the fifth end 15 than the third biasing portion 127. In the second direction, the third receiving portion 26 is farther away from the photosensitive drum than the first biasing surface 231. In the third direction, the first biasing surface 231 is closer to the fifth end 15 than the third biasing surface 261. When the developing cartridge 1 is engaged with the drum unit 2, in the third direction, the first biasing portion 49 is closer to the fifth end 15 than the second biasing portion 27. In the second direction, the first biasing portion 49 is farther away from the developing roller 131 than the second biasing portion 27.

[0095] When the developing cartridge 1 is installed and engaged with the drum unit 2, the first biasing portion 49 of the first urging member of the developing cartridge 1 abuts against the first biasing surface 231 of the drum unit 2, and the third biasing portion 127 of the third urging member of the developing cartridge 2 abuts against the third receiving portion 26, applying a force on the developing cartridge 1 in the installation direction, so that the developing roller 131 is closely attached to the photosensitive drum. When the developing cartridge 1 is installed and engaged with the drum unit 2, the first biasing portion 49 can also abut against the inclined surface of the drum unit 2 on the left side of the first biasing surface 231 in the second direction, and similarly, the developing roller 131 can be closely attached to the photosensitive drum.

[0096] In this embodiment, at the first end 11, the first force - applying part 49 is arranged on the second chip frame 47 on the first end 11. At the second end 12, a second force - receiving part 122 or a third force - applying part 127 is arranged. When the developing cartridge 1 is installed on the drum assembly, the first force - applying part 49 abuts against the first chip frame on the drum assembly 2, the second force - receiving part 122 abuts against the second force - applying part 27 on the drum assembly 2, generating a force on the developing cartridge 1 towards the installation direction. Or the first force - applying part 49 abuts against the first chip frame 23 on the drum assembly 2, and the third force - applying part 127 on the developing cartridge 1 abuts against the third force - receiving part 26 on the drum assembly 2, also generating a force towards the installation direction. Such a force can make the developing roller 131 of the developing cartridge 1 closely fit with the photosensitive drum. In this embodiment, the force - applying parts originally arranged on the drum assembly are arranged on the developing cartridge (the first force - applying part 49 and the third force - applying part 127). When the developing cartridge is installed on the drum assembly, the force - applying parts on the developing cartridge abut against the components of the drum assembly itself, achieving a pushing effect. This setting improves the adaptability of the developing cartridge, enabling the developing cartridge not to be fixedly matched with the drum assembly. According to different requirements, the position of the pushing force on the developing cartridge can be changed, increasing the versatility of the developing cartridge.

[0097] The pushing component can also be arranged such that the force - applying part is arranged on the drum assembly 2 and the force - receiving part is arranged on the developing cartridge 1. When the developing cartridge 1 is installed on the drum assembly 2, the force - receiving part receives the pushing force applied by the force - applying part, so that the developing cartridge 1 drives the developing roller 131 to abut against the photosensitive drum, making the developing roller 131 closely fit with the photosensitive drum.

[0098] In this embodiment, the third force - applying part is closer to the developing roller than the second chip frame in the second direction, and the third force - applying part is located within the rotation axes of the power - receiving part and the stirring gear.

[0099]

Embodiment 2

[0100] Unless otherwise specified, the structure of the developing cartridge in this embodiment is the same as that in Embodiment 1, and the structure of the drum assembly in this embodiment is the same as that in Embodiment 1. The difference between this embodiment and Embodiment 1 is that a set of elastic components is arranged on the third wall 230 in this embodiment, which can enable the developing cartridge 1 and the drum assembly 2 to move relative to the image - forming device together.

[0101] Such as Figures 13 - 15As shown, an elastic component is provided on the drum component. In this embodiment, there are two sets of elastic components, and the structures of the two sets of elastic components are the same. In other embodiments, the number of elastic components can be set according to actual needs. The elastic component is located on the third wall 230 of the drum component 2 in the third direction. An optimal solution is that this set of elastic components is respectively arranged at positions close to the first wall 21 and the second wall 22 of the drum component 2 on the third wall 230 of the drum component 2 in the first direction. The paper guiding part (not shown in the figure) is located in the middle of the elastic component. The elastic component includes a mounting part 28, a movable part 29, and an elastic part. In this embodiment, the elastic part is preferably a compression spring 30, and in other embodiments, it can be other elastic materials. In this embodiment, the mounting part 28 is recessed inward along the third wall 230 in the third direction and is symmetrically arranged on the third wall 230 in the first direction. In other embodiments, the mounting part 28 can be formed by protruding outward on the third wall 230. The recessed formation of the mounting part 28 saves space compared to the protruding formation. The mounting part 28 can be integrally formed with the drum component 2 or fixedly installed on the third wall 230. The inside of the mounting part 28 is hollow, and a guiding part 282 is provided on the mounting part 28. The guiding part 282 is a strip-shaped opening or an arc-shaped opening. In this embodiment, two guiding parts 282 are provided on each mounting part 28 and are respectively located on both sides of the mounting part 28 in the first direction. A fixing column 281 is also provided inside the mounting part 28. The fixing column 281 is arranged at the bottom of the mounting part 28 in the third direction and is in a "cross" shape. The fixing column 281 is used to cooperate with the compression spring 30 to fix and limit the compression spring 30 in the mounting part 28. The fixing column 281 can be in a "star" shape or more recessed than the bottom wall of the mounting part 28 in the third direction, as long as it can fix the compression spring 30 and prevent the compression spring 30 from moving inside the mounting part 28 and affecting the elastic effect, and no specific limitation is made. The movable part 29 is movably installed on the mounting part 28. A guiding part 292 and a abutting part 291 are provided on the movable part 29. Two guiding parts 292 are provided on each movable part 29, corresponding to the guiding parts 282 inside the mounting part 28. The guiding parts 292 are inserted into the guiding parts 282 and match with the guiding parts 282 so that the movable part 29 moves relative to the drum component 2 inside the mounting part 28. The compression spring 30 is installed inside the mounting part 28. One end of the compression spring 30 abuts against the bottom wall of the mounting part 28, specifically cooperates with the fixing column 281 on the bottom wall of the mounting part 28, is sleeved on the fixing column 281, and the other end abuts against the movable part 29. When the movable part 29 moves relative to the drum component 2, the compression spring 30 is compressed. In this embodiment, an elastic component is provided on the drum component 1. After the developing cartridge 1 is installed on the drum component 2, and after the developing cartridge 1 and the drum component 2 are jointly installed in the image forming apparatus, the drum component 2 can move relative to the image forming apparatus when an external force is applied.That is, the abutting portion 291 of the movable member 29 can abut against the bottom wall 90 inside the image forming apparatus after the drum unit 2 is installed in the image forming apparatus, so that the drum unit can move relative to the bottom wall 90 of the image forming apparatus, and at the same time, can also drive the developing cartridge 1 to move relative to the bottom wall 90 of the image forming apparatus. In this embodiment, the specific structure and position of the elastic component are not specifically limited, as long as the drum unit 2 can move relative to the image forming apparatus is achievable.

[0102] Such as Figure 16 , Figure 17As shown, a rail 96 is provided on the side wall 91 of the image forming apparatus. The rail 96 of the image forming apparatus is divided into an upper rail 961 and a lower rail 962. In the third direction, the upper rail 961 is located above the lower rail 962. The first protrusion 94 and the second protrusion 95 are both located on the upper rail 961. A first electrical contact pin 92 is provided on the left side of the first protrusion 94 in the second direction, and a second electrical contact pin 93 is provided on the left side of the second protrusion 95 in the second direction. During the process of installing the developing cartridge 1 and the drum unit 2 onto the image forming apparatus, the first chip 25 on the drum unit 2 needs to move over the first protrusion 94 along the installation direction of the developing cartridge 1 and the drum unit 2 before it can contact the first electrical contact pin 92. During the process of installing the developing cartridge 1 and the drum unit 2 onto the image forming apparatus, the second chip 60 on the developing cartridge 1 needs to move over the second protrusion 95 along the installation direction of the developing cartridge 1 and the drum unit 2 to be able to contact the second electrical contact pin 93. During the process of installing the developing cartridge 1 and the drum unit 2 onto the image forming apparatus, when the first chip 25 moves to the position of the first protrusion 94, the first chip 25 is interfered by the first protrusion 94. Specifically, the first chip 25 is downwardly abutted by the first protrusion 94 in the third direction. The first chip 25 transmits the downward abutting force applied by the first protrusion 94 to the drum unit 2 through the integrally formed first chip bracket 24 and first chip frame 23. The elastic component on the drum unit 2 is compressed, causing the drum unit 2 to move downward along the third direction relative to the image forming apparatus. Specifically, when the abutting force is transmitted to the drum unit, since the abutting portion 291 of the movable member 29 abuts against the bottom 90 of the image forming apparatus, the compression spring 30 is compressed, and the movable member 29 moves relative to the drum unit 2 in the third direction within the mounting portion 28. When the drum unit 2 moves downward by a certain distance, the first chip 25 on the drum unit smoothly moves over the first protrusion 94. When the first chip 25 loses the abutment of the first protrusion 94, the transmitted abutting force of the first protrusion 94 disappears, and the compressed compression spring 90 returns. At this time, under the action of the elastic force when the compression spring 30 returns, the movable member 29 moves in the third direction within the mounting portion 28, driving the drum unit 2 to move in the direction opposite to the abutting force in the third direction, and the first chip 25 contacts the first electrical contact pin 92.During the process of installing the developing cartridge 1 and the drum unit 2 onto the image forming apparatus, when the second chip 60 moves to the position of the second protrusion 95, the second chip 60 is interfered by the second protrusion 95. Specifically, the second chip 60 is downwardly abutted by the second protrusion 95 in the third direction. The second chip 60 transmits the downward abutting force applied by the second protrusion 95 to the developing cartridge 1 through the integrally formed second chip holder 50 and the second chip frame 47, and then to the drum unit 2 through the developing cartridge 1. The elastic component on the drum unit 2 is compressed, causing the drum unit 2 and the developing cartridge 1 to move downward along the third direction relative to the image forming apparatus. Specifically, when the abutting force is transmitted to the drum unit 2 through the developing cartridge 1, since the abutting portion 291 of the movable member 29 abuts against the bottom 90 of the image forming apparatus, the compression spring 30 is compressed, and the movable member 29 moves in the third direction relative to the drum unit 2 within the mounting portion 28. After the drum unit 2 and the developing cartridge 1 move downward a certain distance, the second chip 60 smoothly passes over the second protrusion 95. When the second chip 60 loses the abutment of the second protrusion 95, the abutting force transmitted to the drum unit 2 through the developing cartridge 1 by the second protrusion 95 disappears, and the compressed compression spring 90 returns. At this time, under the action of the elastic force when the compression spring 30 returns, the movable member 29 moves in the third direction within the mounting portion 28, driving the drum unit 2 and the developing cartridge 1 to move in the third direction in the direction opposite to the abutting force. The second chip 60 contacts the second electrical contact pin 93. The contact process between the first chip 25 on the drum unit 1 and the first electrical contact pin 92 can be synchronized with the contact process between the second chip 60 on the developing cartridge 2 and the second electrical contact pin 93, or the drum unit 2 can be installed and contacted first, and the developing cartridge 1 contacts when it is installed onto the drum unit 2 after the drum unit 2 is installed. Whether the drum unit 2 is installed first or the developing cartridge 1 and the drum unit 2 are installed simultaneously, when the second chip 60 on the developing cartridge 1 contacts the second electrical contact pin 93, the contraction of the elastic component will cause the developing cartridge 1 and the drum unit 2 to move relative to the image forming apparatus simultaneously.

[0103] In this embodiment, by providing an elastic component on the third wall 230, after the developing cartridge 1 and the drum unit 2 are installed onto the image forming apparatus, when the second chip 60 and the first chip 25 respectively contact the second electrical contact pin 92 and the first electrical contact pin 93 on the image forming apparatus, the developing cartridge 1 and the drum unit 2 can move relative to the image forming apparatus simultaneously under the action of the elastic component, achieving the purpose of the chip contacting the electrical contact pin. Such a setting of the elastic component makes the process of the drum unit 2 and the developing cartridge 1 moving and contacting more stable.

[0104]

Embodiment 3

[0105] Unless otherwise specified, the structure of the developing cartridge in this embodiment is the same as that in Embodiment 2, and the structure of the drum assembly in this embodiment is the same as that in Embodiment 2. The difference between this embodiment and Embodiment 2 is that a clamping portion 17 is provided at the first end 11 in this embodiment. After the developing cartridge 1 is engaged with the drum assembly 2, the clamping portion 17 can be engaged with the clamping recesses (including the first clamping recess 31, the second clamping recess 32, and the third clamping recess 33) on the drum assembly 2 to fix the developing cartridge 1 on the drum assembly 2.

[0106] As Figure 18 , Figure 19 shown, a clamping portion 17 is provided on the first end 11. The clamping portion 17 includes a connecting arm 171, a clamping surface 172, and an abutting portion 173. The clamping portion 17 is farther from the developing roller 131 than the second chip frame 47 in the second direction. The connecting arm 171 is integrally connected to the cover 19, or can be integrally connected to the first end 11, or can be detachably connected to the first end 11 or the cover 19 in a split manner, which is not limited herein. The clamping surface 172 is formed by the connecting arm 171 extending along the second direction toward the developing roller 131 after extending in the third direction. The abutting portion 173 is semi-circular in this embodiment.

[0107] As Figure 20 shown, the first wall 21 has a first clamping recess 31, which is farther from the photosensitive drum (not shown in the figure) than the first chip frame 23 in the second direction. The first clamping recess 31 is hollowly provided. The upper surface in the third direction thereof is the first clamped surface 311. Below the first clamping recess 31 in the third direction, there are also two recesses, namely the second clamping recess 32 and the third clamping recess 33. The second clamped surface 312 and the third clamped surface 313 are both provided above the second clamping recess 32 and the third clamping recess 33 in the third direction.

[0108] As Figures 18 - 21 shown, when the developing cartridge 1 is installed on the assembly 2, the clamping portion 17 on the developing cartridge 1 can be engaged with the first clamping recess 31 on the drum assembly 2 to fix the developing cartridge 1 on the drum assembly 2. Specifically: after the developing cartridge 1 is engaged with the drum assembly, in the second direction, the clamping portion 17 is farther from the photosensitive drum than the first clamping recess 31. In the third direction, the connecting arm 171 extends downward so that the clamping surface 172 is flush with the first clamped surface 311 of the first clamping recess 31. When the developing cartridge 1 is installed on the drum assembly 2, the semi-circular abutting portion 173 first abuts against the first clamped surface 311 of the first clamping recess 31. The installation direction of the developing cartridge 1 and the drum assembly 2 is the second direction. The developing cartridge 1 and the drum assembly 2 continue to cooperate in the installation direction. The abutting portion 173 enters the first clamping recess 31, and the clamping surface 172 abuts against the first clamped surface 311, and the developing cartridge 1 and the drum assembly 2 are clamped and fixed.

[0109] In this embodiment, the length of the connecting arm 171 is not fixed. The connecting arm 171 can extend longer in the third direction, so that the engaging portion 17 can be engaged with the second engaging recess 32 or the third engaging recess 33. At the same time, the number of the engaging surfaces 172 is not fixed. Multiple engaging surfaces 172 can extend from the connecting arm 171 and be engaged with multiple engaging recesses simultaneously, as long as the developing cartridge 1 can be engaged and fixed with the engaging recesses after being installed on the drum unit 2, and no specific limitation is made. Further, the abutting portion 173 is semicircular in this embodiment, and can also be an elastic member or an inclined surface, as long as it is convenient for the engaging portion 17 to enter the engaging recess, and no specific limitation is made. The setting of multiple engaging recesses can improve the applicability between the drum unit and the developing cartridge, enabling different models of drum units and developing cartridges to be used in combination. In addition, multiple engaging recesses and multiple engaging surfaces 172 form multiple engagements, which can increase the firmness of the engagement.

[0110]

Embodiment 4

[0111] Except as otherwise specified, the structure of the developing cartridge in this embodiment is the same as that in Embodiment 3, and the structure of the drum unit in this embodiment is the same as that in Embodiment 3. The difference between this embodiment and Embodiment 3 is that a buckle portion 18 is provided at the first end 11 in this embodiment. After the developing cartridge 1 is matched with the drum unit 2, the buckle portion 18 can be engaged and matched with the first chip frame 23 to fix the developing cartridge 1 on the drum unit 2.

[0112] As Figures 22 - 24 shown, a buckle portion 18 is provided at the first end 11. In the second direction, the buckle portion 18 is farther from the developing roller 131 than the second chip frame 47. After the developing cartridge 1 is matched with the drum unit 2, the buckle portion 18 is located between the first chip frame 23 and the second chip frame 47 in the second direction, and the buckle portion 18 extends toward the first chip frame 23 in the second direction, forming a buckle surface 181.

[0113] When the developing cartridge 1 is installed on the drum unit 2, the buckle portion 18 can be engaged and matched with the first chip frame 23 to fix the developing cartridge 1 on the drum unit 2. Specifically, a hook is formed at the bottom of the buckle portion 18 in the third direction, and a buckle surface 181 is formed on the hook. The buckle surface 181 is engaged with the bottom of the first chip frame 23 close to the third wall 230 in the third direction and close to the photosensitive drum in the second direction to fix the developing cartridge on the drum unit 2.

[0114] The buckle part 18 can be integrally formed with the cover 19 or detachably connected to the cover 19. The buckle part 18 can be made of a rigid elastic material, which can deform during clamping for easy clamping and is also convenient for releasing the clamping when the developing cartridge 1 is detached from the drum unit 2. The buckle surface 181 can be a smooth inclined surface or a curved surface with a radian on the side facing the first chip frame 25, which can facilitate clamping with the first chip frame 25 during clamping. No specific limitation is made here.

[0115] In Embodiment 3 and Embodiment 4, a locking part (the clamping part 17 in Embodiment 3 and the buckle part 18 in Embodiment 4) is provided on the developing cartridge 1 near the chip. When the developing cartridge is installed on the drum unit, it is clamped with the recess or chip frame originally provided on the drum unit, thereby fixing the developing cartridge 1 on the drum unit without additionally providing a locking part on the drum unit. In this way, the clamping position between the developing cartridge and the drum unit is on the side of the chip of the developing cartridge, greatly increasing the clamping strength between the developing cartridge and the drum unit on the side with the chip, reducing the possibility of movement of the developing cartridge chip. At the same time, since no additional locking part needs to be provided on the drum unit, the manufacturing cost of the drum unit is also reduced.

[0116] In this embodiment, the locking part is farther from the developing roller than the second chip frame in the second direction, and the clamping part is located outside the rotation axes of the power receiving part and the stirring gear.

[0117]

Embodiment 5

[0118] Unless otherwise specified, the structure of the developing cartridge in this embodiment is the same as that in Embodiment 4, and the drum unit in this embodiment is the same as that in Embodiment 4. The difference between this embodiment and Embodiment 4 is that in this embodiment, the first chip 25 and the second chip 60 are arranged on the same component, that is: the second chip 60 originally located on the developing cartridge 1 is now arranged on the drum unit 2, or the first chip 25 originally located on the drum unit is now arranged on the developing cartridge 1.

[0119] As Figure 25 shown, the second chip 60 is arranged on the first wall 21 of the drum unit 2 in the second direction through the second chip frame 47, and the position of the second chip 60 is the same as the position of the second chip 60 after the original developing cartridge 1 with the second chip 60 is installed on the original drum unit 2 with the first chip 25.

[0120] In some other embodiments, as Figure 26 shown, the first chip 25 is arranged on the first end 11 through the first chip frame 23, and the position of the first chip 25 is the same as the position of the first chip 25 after the original drum unit 2 with the first chip 25 is matched with the original developing cartridge 1 with the second chip 60.

[0121] Since the service lives of the first chip 25 and the second chip 60 are different, and the service life of the first chip 25 is four times that of the second chip 60, that is, a drum assembly 2 can be adapted to four developing cartridges 1 before the first chip 25 needs to be replaced, while the second chip 60 needs to be replaced as soon as the developing cartridge 1 is used up.

[0122] When the first chip 25 and the second chip 60 are both arranged on the developing cartridge 1, the first chip 25 is arranged to be detachable relative to the developing cartridge 1. When a new developing cartridge 1 is replaced, only the second chip 60 is carried on the new developing cartridge 1. The first chip 25 removed from the old developing cartridge is installed on the new developing cartridge, and then the new developing cartridge is installed on the drum assembly 2 for continued use. Similarly, when the first chip 25 and the second chip 60 are both arranged on the drum assembly 2, the second chip 60 is arranged to be detachable relative to the drum assembly 2. When the developing cartridge 1 is used up, a new developing cartridge 1 and a new second chip 60 are replaced.

[0123] In this embodiment, by arranging the first chip 25 and the second chip 60 on the developing cartridge 1 or the drum assembly 2 at the same time, when the first and second chips are arranged on the same component, when the developing cartridge 1 and the drum assembly 2 are cooperatively installed on the image forming apparatus, the first and second chips can move synchronously to contact the electrical contact pins of the image forming apparatus and be simultaneously recognized. If there is a deviation, they will not be recognized simultaneously, and only reinstallation is required. In the prior art, when the first and second chips are respectively arranged on different components, it may occur that one chip is recognized while the other is not. Especially when the position cooperation between the developing cartridge and the drum assembly is inaccurate, it is easy to occur that one is recognized while the other is not, that is, it is difficult for the two chips to be recognized simultaneously, making the installation difficult. The new chip arrangement method provided in this embodiment avoids this situation.

[0124] In this embodiment, in the second direction, the first chip frame is farther from the developing roller than the second chip frame.

[0125] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several deformations and improvements can be made, or the above technical solutions can be freely combined, including freely combining the technical features between the above different embodiments. These all belong to the protection scope of the present invention.

Claims

1. A developing cartridge that can be detachably mounted on a drum unit and can be detachably mounted on an image forming apparatus, the drum unit including a photosensitive drum, characterized in that, The developing cartridge includes: a cartridge body for storing a developer, the cartridge body having a first end and a second end oppositely disposed in a first direction, a third end and a fourth end oppositely disposed in a second direction, and a fifth end and a sixth end oppositely disposed in a third direction; a developing roller rotatably disposed on the cartridge body along the first direction, and in the second direction, the developing roller is closer to the third end than the fourth end; a power receiving portion located at the first end of the cartridge body, the power receiving portion being configured to receive power output from the image forming apparatus; a second chip frame disposed at the first end of the cartridge body; a second chip for storing information of the developing cartridge; a second electrical contact surface electrically connected to the chip, the second electrical contact surface being detachably disposed on the second chip frame; a pushing assembly, when the developing cartridge is mounted to the drum assembly, the pushing assembly causes the developing roller and the photosensitive drum to have a force toward each other and thus to be in contact; and an electrode for supplying power to the developing roller, the electrode being located at the second end.

2. The developing cartridge according to claim 1, wherein The pushing assembly includes a first pushing member, the first pushing member including a first force applying portion disposed on the second chip frame and a first elastic member connected between the second chip frame and the first force applying portion. When the developing cartridge is mounted to the drum assembly, the first force applying portion abuts against a first force receiving surface on the drum assembly, thereby compressing the first elastic member. Under the action of the first elastic member, the developing roller and the photosensitive drum are in contact.

3. The developing cartridge according to claim 2, wherein, The drum assembly includes a first chip frame, and the first force receiving surface is disposed on the first chip frame.

4. The developing cartridge according to claim 3, characterized in that, It further includes a stirring gear. In the second direction, the first force applying portion is located outside the rotation axis of the power receiving portion and the rotation axis of the stirring gear.

5. The developing cartridge according to claim 3, wherein The first force applying portion is farther from the developing roller than the second chip frame in the second direction.

6. The developing cartridge according to claim 2, wherein, The pushing assembly includes a third pushing member, the third pushing member including a third force applying portion disposed at the second end of the cartridge body and a third elastic member connected to the third force applying portion. When the developing cartridge is mounted to the drum assembly, the third force applying portion abuts against the drum assembly, thereby compressing the third elastic member. Under the action of the third elastic member, the developing roller and the photosensitive drum are in contact.

7. The developing cartridge according to claim 6, wherein, A concave platform is provided at the second end of the developing cartridge, and a first accommodating portion is provided in the concave platform. The third elastic member is disposed between the first accommodating portion and the third force applying portion.

8. The developing cartridge according to claim 7, wherein The developing cartridge further includes a stirring gear. The third force applying portion is closer to the developing roller than the second chip frame in the second direction, and the third force applying portion is located inside the rotation axis of the power receiving portion and the rotation axis of the stirring gear.

9. The developing cartridge according to claim 1, wherein The developing cartridge further includes a locking portion disposed at the first end of the cartridge body. When the developing cartridge is mounted to the drum assembly, the locking portion cooperates with the drum assembly to fix the developing cartridge to the drum assembly.

10. The developing cartridge according to claim 9, wherein, The locking part includes a clamping part, the clamping part includes a connecting arm extending in the third direction and an abutting part connected to the end of the connecting arm in the extending direction, and the abutting part is used for being embedded into a clamping recess of the drum assembly, so that the developing cartridge and the drum assembly are clamped and fixed.

11. The developing cartridge according to claim 10, wherein There are multiple clamping parts and multiple clamping recesses, and the clamping parts are respectively clamped with the clamping recesses one by one, so that the developing cartridge and the drum assembly are clamped and fixed.

12. The developing cartridge according to claim 9, wherein, The drum assembly includes a first chip frame, and the locking part includes a buckling part, and the buckling part is used for being clamped and fixed with the first chip frame.

13. The developing cartridge according to claim 12, characterized in that, A hook is formed at the bottom of the buckling part in the third direction, and the hook is used for being clamped and fixed with the first chip frame.

14. The developing cartridge according to any one of claims 10-11, characterized in that, The locking part is farther from the developing roller than the second chip frame in the second direction. The developing cartridge further includes a stirring gear, and the clamping part is located outside the rotation axes of the power receiving part and the stirring gear.

15. The developing cartridge according to any one of claims 1 to 7, characterized in that, A first chip frame is further provided at the first end of the cartridge body, and a first chip is detachably provided on the first chip frame, and the first chip is used for storing information of the drum assembly.

16. The developing cartridge according to claim 15, wherein, In the second direction, the first chip frame is farther from the developing roller than the second chip frame.

17. A drum unit is configured to be detachably mounted to a developing cartridge and is further configured to be detachably mounted to an image forming apparatus. The image forming apparatus is provided with a rail on which a first protrusion, a first electrical contact pin, a second protrusion, and a second electrical contact pin are sequentially provided. It is characterized in that, The developing cartridge includes a second chip for storing information of the developing cartridge, and the drum assembly includes: A frame; A first chip for storing information of the drum assembly; and An elastic component, the elastic component is arranged on the frame; when the first chip receives a pressing force applied downward by the first protrusion and / or the second chip receives a pressing force applied downward by the second protrusion when the developing cartridge and the drum assembly are installed on a track of the image forming apparatus, the developing cartridge and the drum assembly move downward together in the third direction, the elastic component abuts against the bottom wall of the image forming apparatus and is compressed, and after the first chip passes over the first protrusion and / or the second chip passes over the second protrusion, the elastic component is released, so that the developing cartridge and the drum assembly move upward together in the third direction, thereby enabling the first chip to contact the first electrical contact pin and / or the second chip to contact the second electrical contact pin.

18. The drum assembly according to claim 17, wherein, The frame includes a first wall and a second wall opposite to each other in the first direction, and a third wall connecting the first wall and the second wall; the elastic component is arranged on the third wall; The elastic component includes a mounting part, a movable part and an elastic part, the mounting part is fixedly arranged on the third wall, the movable part is connected to the mounting part through the elastic part, and the movable part is used for abutting against the bottom wall of the image forming apparatus.

19. A drum unit, which is configured to detachably mount a developing cartridge and is detachably mountable to an image forming apparatus, is characterized in that, The drum assembly includes: A frame, which includes a first wall and a second wall opposite to each other in the first direction, and a third wall connecting the first wall and the second wall; A first chip frame, which is detachably arranged on the first wall, and a first chip for storing information of the drum assembly is arranged on the first chip frame; and A second chip frame, which is detachably arranged on the first wall, and a second chip for storing information of the developing cartridge is arranged on the second chip frame.

Images