Developing box and processing box

Abstract

The embodiment of the utility model provides a developing box and a processing box. The developing box comprises a developing roller, a developing roller gear, a power receiving piece and a speed changing assembly. The developing roller gear is arranged at one end of the developing roller; the developing roller gear can drive the developing roller to rotate through rotation; the power receiving part is used for receiving driving force of the photosensitive unit, the speed change assembly comprises a first gear and a second gear which are coaxially arranged, and the radius of the first gear is different from that of the second gear. The power receiving part is in driving connection with the first gear, and the second gear is in driving connection with the developing roller gear, so that a force transmission path passing through the first gear, the second gear and the developing roller gear is formed between the power receiving part and the developing roller. The developing box provided by the embodiment of the utility model can reduce the manufacturing cost of the imaging equipment.

Description

Technical Field

[0001] This application relates to the field of electrophotographic imaging technology, and in particular to a developing cartridge and a processing cartridge. Background Technology

[0002] The processing cartridge, comprising a developing cartridge and a photosensitive unit, is widely used in imaging devices such as laser printers, copiers, and fax machines. However, in related technologies, both the developing cartridge and the photosensitive unit receive their driving force directly from the imaging device. This necessitates two separate power output components to drive the developing cartridge and the photosensitive unit, increasing the manufacturing cost of the imaging device. Utility Model Content

[0003] In view of this, the main objective of the embodiments of this application is to provide a developing cartridge and a processing cartridge that can reduce the manufacturing cost of imaging devices.

[0004] To achieve the above objectives, the technical solution of this application embodiment is implemented as follows:

[0005] The first aspect of this application provides a developing cartridge, comprising:

[0006] developing roller;

[0007] A developing roller gear is disposed at one end of the developing roller, and the developing roller gear can drive the developing roller to rotate by rotating;

[0008] A power receiver, the power receiver being used to receive the driving force of the photosensitive unit;

[0009] A transmission assembly, comprising a first gear and a second gear coaxially arranged, wherein the radii of the first gear and the second gear are different;

[0010] The power receiver is driven to the first gear, and the second gear is driven to the developing roller gear, so that a power transmission path is formed between the power receiver and the developing roller through the first gear, the second gear and the developing roller gear.

[0011] In one embodiment, the first gear and the second gear have different numbers of teeth.

[0012] In one embodiment, the radius of the second gear is larger than the radius of the first gear, and the number of teeth on the second gear is greater than the number of teeth on the first gear; and / or,

[0013] The ratio of the angular velocity of the developing roller to the angular velocity of the photosensitive drum of the photosensitive unit is greater than or equal to 2.

[0014] In one embodiment, the developing cartridge includes a housing assembly, on which the power receiver, the developing roller, and the developing roller gear are rotatably mounted;

[0015] The rotation axis of the power receiving component and the rotation axis of the developing roller are misaligned; or,

[0016] The rotation axis of the power receiver is coaxial with the rotation axis of the developing roller, and the power receiver can rotate relative to the developing roller and the developing roller gear respectively.

[0017] In one embodiment, the developing cartridge includes a housing assembly, on which the power receiver, the developing roller, and the developing roller gear are rotatably mounted. The rotation axis of the power receiver and the rotation axis of the developing roller are coaxially arranged, and the power receiver can rotate relative to the developing roller and the developing roller gear respectively.

[0018] The power receiving component is rotatably mounted on the roller shaft of the developing roller; or,

[0019] The power receiving element is rotatably mounted on the gear shaft of the developing roller gear.

[0020] In one embodiment, the developing cartridge includes a housing assembly and an end cap, the end cap being detachably disposed at one end of the housing assembly, a portion of the housing assembly protruding near the end cap to form a gear positioning post, the power receiving element being sleeved on the gear positioning post, and one end of the gear positioning post along the protruding direction being connected to the end cap.

[0021] In one embodiment, the outer diameter of the power receiving element is larger than the outer diameter of the developing roller gear.

[0022] In one embodiment, the developing cartridge further includes a first gear set, wherein the first gear is drivenly connected to the first gear set; and / or,

[0023] The developing cartridge also includes a second gear set, and the second gear is drivenly connected to the second gear set.

[0024] In one embodiment, the developing cartridge further includes a powder feeding roller, and one of the first gear set and the second gear set includes a powder feeding roller gear, the powder feeding roller gear being disposed at one end of the powder feeding roller; and / or,

[0025] The developing cartridge also includes a stirring frame, and one of the first gear set and the second gear set includes a stirring frame gear, the stirring frame gear being disposed on the stirring frame; and / or

[0026] The developing cartridge also includes a detection element, and one of the first gear set and the second gear set includes a detection element gear, which is disposed on the detection element.

[0027] A second aspect of this application provides a processing box, including:

[0028] any of the developing cartridges described above;

[0029] The photosensitive unit includes a photosensitive drum and a photosensitive drum gear. The photosensitive drum gear is disposed at one end of the photosensitive drum and is drivenly connected to the power receiver. The photosensitive drum gear receives driving force from the imaging device to drive the photosensitive drum and the power receiver to rotate.

[0030] This application provides a developing cartridge and a processing cartridge. The developing cartridge includes a developing roller, a developing roller gear, a power receiver, and a speed-changing assembly. The power receiver receives the driving force from the photosensitive unit. The speed-changing assembly includes a first gear and a second gear coaxially arranged, with different radii. The power receiver is drivenly connected to the first gear, and the second gear is drivenly connected to the developing roller gear, forming a force transmission path between the power receiver and the developing roller via the first gear, the second gear, and the developing roller gear. Thus, the power receiver of the developing cartridge works in conjunction with the photosensitive unit to receive the driving force from the photosensitive unit. In other words, the imaging device is not directly driven by the developing cartridge, but rather by connecting to the photosensitive unit, through which part of the driving force is transmitted to the developing cartridge, thereby enabling the developing cartridge to operate. Therefore, the imaging device only needs one power output component to work with the photosensitive unit to simultaneously drive both the photosensitive unit and the developing cartridge, thus reducing the manufacturing cost of the imaging device. On the other hand, by adding a speed-changing assembly between the power receiver and the developing roller gear, the power receiver does not directly drive the developing roller to rotate. Instead, the speed-changing assembly changes the speed, thus enabling the developing roller gear and the developing roller to rotate. Furthermore, since the first and second gears of the speed-changing assembly are coaxial but have different radii, the speed difference between the developing roller and the photosensitive drum can be adjusted by regulating the radius difference between the first and second gears. This allows the angular velocity of the developing roller to be adjusted to a better range, thereby improving the powder coating effect. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a developing cartridge according to an embodiment of this application;

[0032] Figure 2 This is a schematic diagram of the structure of a photosensitive unit according to an embodiment of this application;

[0033] Figure 3 for Figure 2Exploded view of the photosensitive unit;

[0034] Figure 4 for Figure 1 A schematic diagram showing the relationship between the developing cartridge and the photosensitive unit;

[0035] Figure 5 for Figure 1 Exploded view of part of the developing chamber structure;

[0036] Figure 6 for Figure 5 A magnified view of a section at point A in the middle;

[0037] Figure 7 for Figure 6 Schematic diagram of the intermediate speed change assembly;

[0038] Figure 8 for Figure 1 A structural schematic diagram of the developing cartridge from another perspective; the end cap is not shown in the figure.

[0039] Figure 9 for Figure 1 A schematic diagram showing the relationship between the structure of the developing cartridge and the photosensitive unit;

[0040] Figure 10 for Figure 9 A magnified view of a section at point B in the middle;

[0041] Figure 11 This is a schematic diagram illustrating the cooperation relationship between the developing cartridge and the photosensitive unit according to another embodiment of this application;

[0042] Figure 12 for Figure 11 A magnified view of a section at point C;

[0043] Figure 13 for Figure 11 A structural diagram from another perspective;

[0044] Figure 14 for Figure 11 Exploded view of part of the developing chamber structure;

[0045] Figure 15 for Figure 14 A magnified view of a section at point D.

[0046] Explanation of reference numerals in the attached figures

[0047] 10. Developing box; 11. Developing roller; 12. Developing roller gear; 13. Power receiver; 14. Speed ​​transmission assembly;

[0048] 141. First gear; 142. Second gear; 15. Housing assembly; 151. Gear locating pin; 16. End cap;

[0049] 17. Powder feeding roller gear; 18. Detector gear; 19. Powder feeding roller; 191. Detector; 20. Photosensitive unit;

[0050] 21. Photosensitive drum; 22. Photosensitive drum gear. Detailed Implementation

[0051] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0052] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0053] One embodiment of this application provides a developer cartridge 10, please refer to... Figure 1 , Figure 5 and Figure 6 The developing cartridge 10 includes a developing roller 11, a developing roller gear 12, a power receiving component 13, and a speed change assembly 14.

[0054] The developing roller gear 12 is located at one end of the developing roller 11, and the developing roller gear 12 can drive the developing roller 11 to rotate by rotating.

[0055] The power receiver 13 is used to receive the driving force of the photosensitive unit 20.

[0056] The transmission assembly 14 includes a first gear 141 and a second gear 142 arranged coaxially, and the radii of the first gear 141 and the second gear 142 are different.

[0057] The power receiver 13 is driven to the first gear 141, and the second gear 142 is driven to the developing roller gear 12, so that a power transmission path is formed between the power receiver 13 and the developing roller 11 through the first gear 141, the second gear 142 and the developing roller gear 12.

[0058] Another embodiment of this application provides a processing box; please refer to [link / reference]. Figures 1 to 4The processing box includes a photosensitive unit 20 and a developing box 10 as described in any embodiment of this application. The photosensitive unit 20 includes a photosensitive drum 21 and a photosensitive drum gear 22. The photosensitive drum gear 22 is disposed at one end of the photosensitive drum 21 and is drivenly connected to the power receiver 13. The photosensitive drum gear 22 drives the photosensitive drum 21 and the power receiver 13 to rotate by receiving driving force from the imaging device.

[0059] Specifically, the imaging device can be any type of imaging device such as a printer, copier, or fax machine. The processing cartridge is used to install on the imaging device to cooperate with it. When the imaging device is started, it transmits driving force to the photosensitive unit 20, and then through the photosensitive drum gear 22 of the photosensitive unit 20 to the developing cartridge 10, thereby realizing power transmission.

[0060] Under the driving force of the imaging device, the photosensitive drum gear 22 can drive the photosensitive drum 21 to rotate. Furthermore, since the photosensitive drum gear 22 is also driven and connected to the power receiver 13, the photosensitive drum gear 22 can also drive the power receiver 13 to rotate, thereby causing the developing roller 11 to rotate through the power receiver 13, the speed change assembly 14, and the developing roller gear 12.

[0061] In fact, the developing cartridge 10 includes a housing assembly 15, and the developing roller 11, developing roller gear 12, power receiver 13 and speed change assembly 14 are all rotatably mounted on the housing assembly 15.

[0062] The developing roller gear 12 is a gear structure used to drive the developing roller 11 to rotate.

[0063] The power receiver 13 can receive the driving force transmitted by the photosensitive unit 20, and the driving force of the photosensitive unit 20 comes from the imaging device.

[0064] The first gear 141 and the second gear 142 of the transmission assembly 14 are coaxial and can rotate synchronously. In fact, the first gear 141 and the second gear 142 are relatively fixed.

[0065] The first gear 141 is used to cooperate with the power receiver 13 to receive the driving force transmitted from the power receiver 13, and the second gear 142 is used to cooperate with the developing roller gear 12 to transmit the driving force to the developing roller gear 12.

[0066] It should be noted that the first gear 141 and the power receiver 13 can be directly meshed for transmission. Of course, in some embodiments, other gear structures can be provided between the first gear 141 and the power receiver 13 for indirect meshing transmission.

[0067] The second gear 142 and the developing roller gear 12 can also be directly meshed for transmission. Of course, in some embodiments, other gear structures can be provided between the second gear 142 and the developing roller gear 12 for indirect meshing for transmission.

[0068] Therefore, when the power receiver 13 receives the driving force from the photosensitive unit 20, the driving force can be transmitted along the force transmission path, passing through the first gear 141, the second gear 142 and the developing roller gear 12 in sequence, and thus to the developing roller 11 to realize the rotation of the developing roller 11.

[0069] Since the first gear 141 and the second gear 142 are coaxially arranged and have different radii, that is, the dimensions of the first gear 141 and the second gear 142 are different. During the force transmission process, the angular velocities of the first gear 141 and the second gear 142 are the same, but their linear velocities are different. Therefore, the linear velocity of the developing roller gear 12 can be different from the linear velocity of the photosensitive drum 21 of the photosensitive unit 20.

[0070] Depending on the actual situation, the radius of the first gear 141 can be larger, or the radius of the second gear 142 can be larger.

[0071] In practice, the dimensions of the first gear 141 and / or the second gear 142 can be selected as needed to adjust the linear velocity of the developing roller gear 12, thereby enabling the adjustment of the angular velocity of the developing roller gear 12 and the developing roller 11, so that the angular velocity of the developing roller 11 and the angular velocity of the photosensitive drum 21 are within the required set ratio range, thus achieving a better developing effect.

[0072] For example, the ratio of the angular velocity of the developing roller 11 to the angular velocity of the photosensitive drum 21 of the photosensitive unit 20 is greater than or equal to 2. That is, the angular velocity of the developing roller 11 is greater than or equal to twice the angular velocity of the photosensitive drum 21. By controlling the angular velocity of the developing roller 11 within the above range, a better developing effect can be achieved.

[0073] It should be noted that, apart from the difference in radius, other dimensions of the first gear 141 and the second gear 142 may also differ. For example, the number of teeth on the outer circumference of the first gear 141 and the second gear 142 may be different. That is, the number of teeth on the outer circumference of the first gear 141 and the second gear 142 may not be the same. Depending on the actual situation, either the first gear 141 or the second gear 142 may have more teeth on its outer circumference.

[0074] For example, please refer to Figure 7 The radius of the second gear 142 is larger than that of the first gear 141, and the number of teeth of the second gear 142 is greater than that of the first gear 141. This increases the rotational speed of the developing roller 11, resulting in better developing performance.

[0075] Understandably, there is no limit to the number of gear shift components 14; there can be one or more, and the number can be set according to the actual situation.

[0076] In the developing cartridge 10 of this application embodiment, the power receiver 13 of the developing cartridge 10 is used to receive the driving force of the photosensitive unit 20. The first gear 141 and the second gear 142 of the transmission assembly 14 are coaxially arranged and have different radii. The power receiver 13 is drivenly connected to the first gear 141, and the second gear 142 is drivenly connected to the developing roller gear 12, so that a force transmission path is formed between the power receiver 13 and the developing roller 11 through the first gear 141, the second gear 142 and the developing roller gear 12. Thus, on the one hand, the power receiver 13 of the developing cartridge 10 is used to cooperate with the photosensitive unit 20 to receive the driving force from the photosensitive unit 20. That is to say, the imaging device is not directly driven connected to the developing cartridge 10, but is driven connected to the photosensitive unit 20, and then the photosensitive unit 20 transmits part of the driving force to the developing cartridge 10, thereby enabling the developing cartridge 10 to work. Therefore, the imaging device only needs to have one power output component to work with the photosensitive unit 20, which can simultaneously drive the photosensitive unit 20 and the developing cartridge 10, thus reducing the manufacturing cost of the imaging device. On the other hand, by adding a speed-changing component 14 between the power receiver 13 and the developing roller gear 12, the power receiver 13 does not directly drive the developing roller 11 to rotate. Instead, the speed-changing component 14 changes the speed to achieve the rotation of the developing roller gear 12 and the developing roller 11. At the same time, since the first gear 141 and the second gear 142 of the speed-changing component 14 are coaxial and have different radii, the speed difference between the developing roller 11 and the photosensitive drum 21 can be adjusted by adjusting the radius difference between the first gear 141 and the second gear 142. This allows the angular velocity of the developing roller 11 to be adjusted to a better range, thereby improving the toner application effect.

[0077] In one embodiment, please refer to Figure 6 and Figure 8 The developing cartridge 10 includes a housing assembly 15, a power receiver 13, a developing roller 11 and a developing roller gear 12, all of which are rotatably mounted on the housing assembly 15. The rotation axis of the power receiver 13 and the rotation axis of the developing roller 11 are misaligned.

[0078] In other words, the power receiver 13 and the developing roller 11 are not coaxially arranged. The rotation axis of the power receiver 13 and the rotation axis of the developing roller 11 do not coincide, but are staggered.

[0079] Therefore, the power receiver 13 and the developing roller gear 12 are not on the same axis of rotation, which facilitates the structural layout of the power receiver 13 and the developing roller gear 12.

[0080] In one embodiment, please refer to Figures 11 to 15 The developing cartridge 10 includes a housing assembly 15, a power receiver 13, a developing roller 11 and a developing roller gear 12, all of which are rotatably mounted on the housing assembly 15. The rotation axis of the power receiver 13 is coaxial with the rotation axis of the developing roller 11, and the power receiver 13 can rotate relative to the developing roller 11 and the developing roller gear 12 respectively.

[0081] In other words, the power receiver 13, the developing roller 11, and the developing roller gear 12 are coaxially arranged. The rotation axes of the power receiver 13, the developing roller 11, and the developing roller gear 12 coincide and are not staggered. This saves space in the structural layout of the developing cartridge 10 and minimizes its size.

[0082] It should be noted that, among the power receiver 13, the developing roller 11, and the developing roller gear 12, the developing roller 11 and the developing roller gear 12 are relatively fixed, while the power receiver 13 rotates relative to both the developing roller 11 and the developing roller gear 12. That is, when the developing roller gear 12 rotates, the developing roller 11 rotates synchronously. However, when the power receiver 13 rotates, it does not directly cause the developing roller 11 and the developing roller gear 12 to rotate; instead, it is driven by the speed change assembly 14, which then causes the developing roller gear 12 and the developing roller 11 to rotate. This achieves a better speed change effect.

[0083] It should be noted that when the rotation axis of the power receiver 13 and the rotation axis of the developing roller 11 are coaxially arranged, and the power receiver 13 can rotate relative to the developing roller 11 and the developing roller gear 12 respectively, the specific arrangement of the power receiver 13 is not limited.

[0084] For example, the power receiver 13 is rotatably mounted on the roller shaft of the developing roller 11. That is, the power receiver 13 has a connecting hole through which the roller shaft of the developing roller 11 passes, and the power receiver 13 can rotate relative to the roller shaft of the developing roller 11. Thus, the power receiver 13 can be well coaxially arranged with the developing roller 11 and the developing roller gear 12.

[0085] For example, the power receiver 13 is rotatably mounted on the gear shaft of the developing roller gear 12. That is, the power receiver 13 has a connecting hole through which the gear shaft of the developing roller gear 12 passes, and the power receiver 13 can rotate relative to the gear shaft of the developing roller gear 12. Thus, the power receiver 13 can be well coaxially arranged with the developing roller gear 12 and the developing roller 11.

[0086] In one embodiment, please refer to Figure 1 and Figure 6The developing cartridge 10 includes a housing assembly 15 and an end cap 16. The end cap 16 is detachably disposed at one end of the housing assembly 15. A portion of the housing assembly 15 near the end cap 16 protrudes to form a gear positioning post 151. The power receiver 13 is sleeved on the gear positioning post 151, and one end of the gear positioning post 151 along the protruding direction is connected to the end cap 16. This design minimizes the risk of damage to the gear positioning post 151 and improves the installation stability of the power receiver 13.

[0087] Specifically, the end cap 16 and the power receiver 13 are located at the same end of the housing assembly 15, and the gear positioning post 151 is a protruding structure at the end of the housing assembly 15 near the end cap 16. The power receiver 13 is rotatably sleeved on the gear positioning post 151.

[0088] The outer end of the gear positioning post 151 is fixed to the end cover 16, thereby forming a double-end support, which can greatly improve the connection stability of the gear positioning post 151 and greatly reduce the risk of breakage of the gear positioning post 151, thus improving the installation stability of the power receiving component 13.

[0089] In one embodiment, please refer to Figure 8 The outer diameter of the power receiver 13 is larger than the outer diameter of the developing roller gear 12. This facilitates the meshing of the power receiver 13 with the developing roller gear 12, while preventing interference between the developing roller gear 12 and the photosensitive drum gear 22 caused by the power receiver 13 being too small.

[0090] In one embodiment, the developing cartridge 10 further includes a first gear set, with a first gear 141 drivenly connected to the first gear set. That is, in addition to being drivenly connected to the power receiver 13, the first gear 141 is also drivenly connected to the first gear assembly. Thus, when the power receiver 13 drives the first gear 141 to rotate, the second gear 142 rotates synchronously with the first gear 141. Simultaneously, the first gear assembly also rotates under the drive of the first gear 141. This facilitates the transmission of the driving force received by the power receiver 13 to other structures.

[0091] In one embodiment, the developing cartridge 10 further includes a second gear set, with the second gear 142 drivenly connected to the second gear set. That is, in addition to being drivenly connected to the developing roller gear 12, the second gear 142 is also drivenly connected to the second gear assembly. Therefore, when the power receiver 13 drives the first gear 141 to rotate, the second gear 142 rotates synchronously with the first gear 141. Besides the developing roller gear 12 rotating under the drive of the second gear 142, the second gear assembly also rotates under the drive of the second gear 142. This facilitates the transmission of the driving force received by the power receiver 13 to other structures.

[0092] It should be noted that, depending on the actual situation, the developing cartridge 10 may only have the first gear set, or only the second gear set, or both the first gear set and the second gear set may be provided.

[0093] It should be noted that the specific structural types of the first gear set and the second gear set are not limited.

[0094] For example, please see Figure 9 and Figure 10 The developing cartridge 10 also includes a toner delivery roller 19. One of the first gear set and the second gear set includes a toner delivery roller gear 17, which is disposed at one end of the toner delivery roller 19. That is, the first gear set may include the toner delivery roller gear 17, i.e., the toner delivery roller gear 17 is connected to the first gear 141. Alternatively, the second gear set may include the toner delivery roller gear 17, i.e., the toner delivery roller gear 17 is connected to the second gear 142. Thus, power can be transmitted to the toner delivery roller gear 17 to rotate the toner delivery roller 19.

[0095] For example, the developing cartridge 10 also includes a stirring rack, and one of the first gear set and the second gear set includes a stirring rack gear, which is mounted on the stirring rack. That is, the first gear set may include the stirring rack gear, i.e., the stirring rack gear is connected to the first gear 141. Alternatively, the second gear set may include the stirring rack gear, i.e., the stirring rack gear is connected to the second gear 142. This allows power to be transmitted to the stirring rack gear to achieve rotation of the stirring rack.

[0096] For example, please refer to Figure 9 and Figure 10 The developing cartridge 10 also includes a detection element 191. One of the first gear set and the second gear set includes a detection element gear 18, which is disposed on the detection element 191. That is, the first gear set may include the detection element gear 18, i.e., the detection element gear 18 is connected to the first gear 141. Alternatively, the second gear set may include the detection element gear 18, i.e., the detection element gear 18 is connected to the second gear 142. Thus, power can be transmitted to the detection element gear 18 to enable the movement of the detection element 191.

[0097] It should be noted that the detection component 191 can be switched between different positions by movement, thereby providing the corresponding detection information.

[0098] In one specific embodiment, the developing cartridge 10 further includes a first receiver and a second receiver that are separated from each other. Both the first receiver and the second receiver can be used to receive the driving force from the photosensitive unit 20. The first receiver is a power receiver 13, which is drivenly connected to the developing roller 11, and the second receiver is drivenly connected to the detection element 191. That is, the developing cartridge 10 is provided with two receivers for receiving the driving force from the photosensitive unit 20, one of which is used to drive the developing roller 11, and the other is used to drive the detection element 191.

[0099] In one specific embodiment, the photosensitive unit 20 may include a plurality of photosensitive drum gears 22, and the power receiving member 13 may mesh with any one of the photosensitive drum gears 22 to achieve power transmission.

[0100] In the description of this application, the references to terms such as "in one embodiment," "in some embodiments," "in a specific embodiment," or "exemplary," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine the different embodiments or examples described in this application, as well as the features of the different embodiments or examples.

[0101] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A developing cartridge, characterized by, The development roller; The development roller gear is arranged at one end of the development roller, and the development roller gear can drive the development roller to rotate by rotating; The power receiving member is used for receiving the driving force of the photosensitive unit; The variable speed assembly includes coaxially arranged first and second gears, and the radii of the first and second gears are different; The power receiving member and the first gear are drivingly connected, and the second gear and the development roller gear are drivingly connected, so that the power receiving member and the development roller form a force transmission path through the first gear, the second gear and the development roller gear. The number of teeth of the first gear and the second gear is different.

2. The process cartridge according to claim 1, wherein, The radius of the second gear is greater than the radius of the first gear, and the number of teeth of the second gear is greater than the number of teeth of the first gear; and / or, 3. The process cartridge of claim 1, wherein, The ratio of the angular velocity of the development roller to the angular velocity of the photosensitive drum of the photosensitive unit is greater than or equal to 2. The development cartridge includes a housing assembly, and the power receiving member, the development roller and the development roller gear are rotatably arranged on the housing assembly; 4. The process cartridge according to any one of claims 1 to 3, wherein The rotation axis of the power receiving member and the rotation axis of the development roller are arranged in a staggered manner; or, The rotation axis of the power receiving member and the rotation axis of the development roller are coaxially arranged, and the power receiving member can rotate relative to the development roller and the development roller gear, respectively. The development cartridge includes a housing assembly, and the power receiving member, the development roller and the development roller gear are rotatably arranged on the housing assembly, the rotation axis of the power receiving member and the rotation axis of the development roller are coaxially arranged, and the power receiving member can rotate relative to the development roller and the development roller gear, respectively; 5. The process cartridge according to any one of claims 1-3, wherein The power receiving member is rotatably sleeved on the roller shaft of the development roller; or, The power receiving member is rotatably sleeved on the gear shaft of the development roller gear. The development cartridge includes a housing assembly and an end cover, the end cover is detachably arranged at one end of the housing assembly, the part of the housing assembly close to the end cover protrudes in the direction of the end cover to form a gear positioning column, the power receiving member is sleeved on the gear positioning column, and one end of the gear positioning column in the protruding direction is connected with the end cover.

6. The process cartridge according to any one of claims 1-3, wherein The outer diameter of the power receiving member is greater than the outer diameter of the development roller gear.

7. The process cartridge according to any one of claims 1-3, wherein The development cartridge further includes a first gear set, the first gear is drivingly connected with the first gear set; and / or, 8. The process cartridge according to any one of claims 1-3, wherein The development cartridge further includes a second gear set, the second gear is drivingly connected with the second gear set. The development cartridge further includes a powder feeding roller, one of the first gear set and the second gear set includes a powder feeding roller gear, and the powder feeding roller gear is arranged at one end of the powder feeding roller; and / or, 9. The process cartridge of claim 8 wherein, The development cartridge further includes a stirring frame, one of the first gear set and the second gear set includes a stirring frame gear, and the stirring frame gear is arranged on the stirring frame; and / or, The development cartridge further includes a detection member, one of the first gear set and the second gear set includes a detection member gear, and the detection member gear is arranged on the detection member. The development roller; 10. A process cartridge, characterized by, ​ The developing cartridge according to any one of claims 1-9; A photosensitive unit, the photosensitive unit comprising a photosensitive drum and a photosensitive drum gear, the photosensitive drum gear being disposed at one end of the photosensitive drum, the photosensitive drum gear being drivingly connected with the power receiver, the photosensitive drum gear driving the photosensitive drum and the power receiver to rotate by receiving driving force from the image forming device.

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