Processing box

Abstract

The utility model provides a processing box, which comprises a powder supply bin, a powder discharge port, a powder discharge port, a powder discharge port and a powder discharge port, and is characterized in that the powder supply bin is provided with a carbon powder cavity; a developing roller; the sealing filter screen is arranged at the powder outlet and completely covers the powder outlet, and the mesh aperture of the sealing filter screen can be elastically converted between a sealing state and an expansion state; the stirring frame comprises a rotating shaft and a flexible sheet, and the stirring end of the flexible sheet is bent to abut against the inner circumferential wall of the carbon powder cavity or the inner side face, close to the carbon powder cavity, of the sealing filter screen; in a sealing state, the aperture of the grid is smaller than the particle size of the carbon powder, and the stirring end of the flexible sheet is bent to abut against the inner circumferential wall of the carbon powder cavity; and in the expansion state, the stirring end of the flexible sheet is bent and propped against the inner side surface of the sealing filter screen, so that the aperture of the grid is greater than the particle size of the carbon powder. According to the processing box, carbon powder can be prevented from leaking and being polluted, the powder supply amount is uniform and stable, so that the imaging quality is ensured, and a user does not need to pull open and tear off the sealing film when the processing box is used, so that the use experience of the user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic photographic imaging printing, in particular to a processing box which is detachably installed on an electronic photographic imaging device. Background Art

[0002] Electrophotographic imaging devices such as laser printers, copiers, fax machines, image processors, etc., are devices that use the principle of electrophotography to form images on image forming media such as paper through processes such as charging, exposure, development, transfer, fixing, and cleaning. Typically, imaging devices use a process cartridge that is detachably installed therein to provide toner.

[0003] In order to avoid toner leakage during transportation and storage, the existing processing box is provided with a sealing film at the powder outlet of the powder supply bin. The sealing film is used to seal the toner in the powder supply bin to prevent toner leakage. Therefore, when the processing box is installed on the imaging device for use, the user needs to first pull and tear off the sealing film to release the toner in the powder supply bin to participate in printing, so that the toner in the powder supply bin is in a state where it can be supplied from the powder outlet of the powder supply bin, and then install the processing box in the imaging device when the toner in the powder supply bin is in a state where it can be supplied.

[0004] However, after the sealing film of the existing processing box is pulled open and torn off, it is inevitable that foreign matter will enter the interior of the powder supply bin from the powder outlet, thereby contaminating the toner and affecting the imaging quality. In addition, the existing processing box uses the stirring rack in the powder supply bin to roll the toner inside from the powder supply bin to the powder outlet, so as to push the toner out of the powder outlet to supply the toner to the developing roller. Since the powder outlet cannot control the powder supply amount, the powder supply amount is unstable, and powder explosion is prone to occur. In addition, powder accumulation will occur on the side of the powder outlet close to the developing roller, affecting the stability of powder supply. Utility Model Content

[0005] In order to achieve the main purpose of the utility model, the utility model provides a processing box that prevents toner leakage, avoids toner contamination, and supplies toner evenly and stably, thereby ensuring imaging quality. The processing box does not require the user to pull open and tear off the sealing film when in use, thereby improving the user experience.

[0006] In order to achieve the main purpose of the utility model, the utility model provides a processing box, including: a powder supply bin, the powder supply bin has a toner cavity for accommodating toner, and the toner cavity has a powder outlet; a developing roller, the developing roller is rotatably supported between the two end walls of the powder supply bin around its own axis, and the developing roller is located on the outside of the powder outlet away from the toner cavity; a sealing filter screen, the sealing filter screen is arranged at the powder outlet and completely covers the powder outlet, and the mesh aperture of the sealing filter screen can be elastically changed between a sealed state and an expanded state; a stirring frame, the stirring frame includes a rotating shaft and a flexible sheet, and the rotating shaft can rotate around its own axis. The body axis is rotatably supported between the two end walls of the powder supply bin and is located in the carbon powder chamber, the mounting end of the flexible sheet is arranged on the rotating shaft, the stirring end of the flexible sheet is convexly arranged in the radial direction of the rotating shaft, and the stirring end of the flexible sheet is bent and pressed against the inner circumferential wall of the carbon powder chamber or the inner side surface of the sealing filter close to the carbon powder chamber; in the sealed state, the mesh aperture is smaller than the particle size of the carbon powder, and the stirring end of the flexible sheet is bent and pressed against the inner circumferential wall of the carbon powder chamber; in the expanded state, the stirring end of the flexible sheet is bent and pressed against the inner side surface of the sealing filter to force the mesh aperture to be larger than the particle size of the carbon powder.

[0007] It can be seen from the above scheme that after the processing box of the utility model contains the carbon powder into the carbon powder chamber of the powder supply bin before leaving the factory, the sealing filter is installed at the powder outlet of the carbon powder chamber and completely covers the powder outlet. At this time, the sealing filter is in a sealed state, and the stirring end of the flexible sheet of the stirring frame is bent and pressed against the inner wall of the carbon powder chamber. The stirring end of the flexible sheet of the stirring frame has no compressive force on the sealing filter, so that the mesh aperture of the elastically reset sealing filter is smaller than the particle size of the carbon powder, and the carbon powder in the carbon powder chamber cannot pass through the mesh aperture of the sealing filter, so that the sealing filter seals the powder outlet to prevent the carbon powder from leaking out, thereby preventing the carbon powder from leaking during transportation and storage of the processing box. When the processing box of the present invention needs to be installed on the imaging device for use, compared with the existing processing box, which requires the user to pull open and tear off the sealing film to release the toner in the powder supply bin to participate in printing, the processing box of the present invention does not require the user to pull open and tear off the sealing film when in use, thereby improving the user experience. The sealing filter seals the powder outlet to prevent toner from leaking out, and can also prevent external impurities from entering the toner chamber to contaminate the toner, thereby avoiding toner contamination and ensuring imaging quality. When the processing box of the utility model is installed in the imaging device to provide carbon powder, the rotating shaft of the stirring frame drives the flexible sheet to rotate around its own axis to stir the carbon powder in the carbon powder chamber. When the stirring end of the flexible sheet is bent and pressed against the inner side surface of the sealing filter, the sealing filter is in an expanded state. At this time, since the stirring end of the flexible sheet is bent and pressed against the inner side surface of the sealing filter, the grid holes of the sealing filter are forced to expand and deform elastically, so that the grid hole diameter of the sealing filter is larger than the particle diameter of the carbon powder. Therefore, the carbon powder in the carbon powder chamber passes through the grid holes of the sealing filter under the squeezing of the stirring end of the flexible sheet to supply powder to the developing roller. Since the sealing filter can control the amount of carbon powder passing through the powder outlet, it can quantitatively supply powder to the developing roller, so that the powder supply is uniform and stable, thereby ensuring the imaging quality.

[0008] A further solution is that the mesh number of the filter screen is between 30 meshes and 200 meshes; and / or, in the expanded state, the mesh aperture is between 325 microns and 175 microns.

[0009] A further solution is that the mesh size of the filter screen is between 50 meshes and 100 meshes.

[0010] A further solution is that a fixing part is arranged around the protruding powder outlet of the sealing filter screen, and the fixing part is installed on the powder supply bin.

[0011] A further solution is that a powder supply port communicating with the carbon powder chamber is formed through the powder supply bin, and a sealing cover is detachably mounted at the powder supply port.

[0012] A further solution is that the processing box includes a waste toner bin and a photosensitive drum, the photosensitive drum is rotatably supported around its own axis between the two end walls of the waste toner bin, and the two end walls of the waste toner bin are respectively connected to the two end walls of the powder supply bin.

[0013] A further solution is that the processing box also includes a rotational driving force receiving head and a rotational force transmission assembly, the rotational driving force receiving head is arranged on an axial end of the photosensitive drum and is used to receive the rotational driving force of the imaging device; the rotational force transmission assembly includes a first driving gear, a second driving gear, a third driving gear and a transmission gear group, the first driving gear is sleeved on the photosensitive drum, the second driving gear is sleeved on the developing roller and meshes with the first driving gear, and the third driving gear is sleeved on the rotating shaft and receives the rotational driving force of the second driving gear through the transmission gear group.

[0014] A further solution is that the transmission gear group includes a first transmission gear and a second transmission gear, and the first transmission gear and the second transmission gear are respectively rotatably supported on one end wall of the powder supply bin, the first transmission gear includes a primary gear and a secondary gear, the pitch circle diameter of the primary gear is larger than the pitch circle diameter of the secondary gear, and the second transmission gear includes a third gear and a fourth gear, the pitch circle diameter of the third gear is larger than the pitch circle diameter of the fourth gear; the primary gear is meshed with the second drive gear, the secondary gear is meshed with the third gear, and the fourth gear is meshed with the third drive gear.

[0015] A further solution is that the processing box also includes a first spring, and the two end walls of the waste powder bin are respectively rotatably hinged to the two end walls of the powder supply bin in a direction perpendicular to the axis of the developing roller, and the two ends of the first spring are respectively pressed between the powder supply bin and the waste powder bin to make the developing roller and the photosensitive drum move toward each other.

[0016] A further solution is that the processing box also includes a charging roller and two supporting assemblies, and the two supporting assemblies are respectively located at both ends of the charging roller in the axial direction of the charging roller; each supporting assembly includes a second spring and a supporting ring, and the supporting ring is provided with a supporting hole. One end of the charging roller is rotatably located in the supporting hole, and support frames are respectively provided at both ends of the waste toner bin, and the two ends of a second spring are respectively pressed between a supporting frame and a supporting ring to force the support ring to move toward the photosensitive drum in the axial direction perpendicular to the photosensitive drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of a processing box embodiment of the utility model from a first viewing angle.

[0018] Figure 2 It is a structural diagram of the processing box embodiment of the utility model from a second viewing angle.

[0019] Figure 3 It is a cross-sectional view of an embodiment of a processing box of the utility model.

[0020] Figure 4 It is an exploded view of an embodiment of a processing box of the utility model.

[0021] Figure 5 It is a structural diagram of the coordination between the charging roller and the supporting assembly in the processing box embodiment of the utility model.

[0022] Figure 6 It is an exploded view of the coordination between the charging roller and the supporting assembly in the processing box embodiment of the utility model.

[0023] Figure 7 It is a structural diagram of the cooperation between the rotational driving force receiving head and the rotational force transmission component in the processing box embodiment of the utility model.

[0024] Figure 8 It is a partial structural exploded view of the powder supply bin in the embodiment of the processing box of the utility model.

[0025] Fig. 9 It is a structural diagram of a stirring frame in an embodiment of a processing box of the utility model.

[0026] Fig.10 It is a schematic diagram of the sealing filter screen in the sealed state in the embodiment of the processing box of the utility model.

[0027] Fig.11 It is a schematic diagram of the sealing filter screen in the expanded state in the embodiment of the processing box of the utility model.

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0029] See also Figures 1 to 9The present embodiment discloses a processing box 10, including a powder supply bin 11, a developing roller 15, a sealing filter 16 and a stirring frame 17. The powder supply bin 11 has a toner chamber 111 for accommodating toner, and the toner chamber 111 has a powder outlet 112. The developing roller 15 is supported between the two end walls of the powder supply bin 11 so as to be rotatable around its own axis, and the developing roller 15 is located outside the powder outlet 112 away from the toner chamber 111. In this embodiment, the sealing filter 16 is arranged at the powder outlet 112 and completely covers the powder outlet 112, and the mesh aperture of the sealing filter 16 can be elastically changed between a sealed state and an expanded state. In addition, the stirring frame 17 of this embodiment includes a rotating shaft 171 and a flexible sheet 172. The rotating shaft 171 is rotatably supported around its own axis between the two end walls of the powder supply bin 11 and is located in the carbon powder chamber 111. The mounting end of the flexible sheet 172 is arranged on the rotating shaft 171. The stirring end of the flexible sheet 172 is arranged to protrude outward in the radial direction of the rotating shaft 171, and the stirring end of the flexible sheet 172 is bent and pressed against the inner peripheral wall of the carbon powder chamber 111 or the inner side surface of the sealing filter 16 close to the carbon powder chamber 111. In the sealed state, the mesh aperture of the sealing filter 16 is smaller than the particle size of the carbon powder, and the stirring end of the flexible sheet 172 is bent and pressed against the inner peripheral wall of the carbon powder chamber 111; in the expanded state, the stirring end of the flexible sheet 172 is bent and pressed against the inner side surface of the sealing filter 16 to force the mesh aperture of the sealing filter 16 to be larger than the particle size of the carbon powder.

[0030] In the present embodiment, after the toner is contained in the toner chamber 111 of the toner supply bin 11 before leaving the factory, the filter screen 16 is installed at the powder outlet 112 of the toner chamber 111 and completely covers the powder outlet 112. At this time, the filter screen 16 is in a sealed state (such as Fig.10As shown in the figure, the stirring end of the flexible sheet 172 of the stirring frame 17 is bent and pressed against the inner wall of the carbon powder chamber 111, and the stirring end of the flexible sheet 172 of the stirring frame 17 has no compressive force on the sealing filter 16, so that the mesh aperture D1 of the elastically reset sealing filter 16 is smaller than the particle size of the carbon powder, and the carbon powder in the carbon powder chamber 111 cannot pass through the mesh aperture of the sealing filter 16, so that the sealing filter 16 seals the powder outlet 112 to prevent the carbon powder from leaking out, thereby preventing the carbon powder leakage during the transportation and storage of the processing box 10. When the processing box 10 of this embodiment needs to be installed on an imaging device for use, compared with the existing processing boxes that need to pull open and tear off the sealing film to release the toner in the powder supply bin to participate in printing, the processing box 10 of this embodiment does not require the user to pull open and tear off the sealing film when in use, thereby improving the user experience. In addition, the sealing filter 16 seals the powder outlet 112 to prevent toner from leaking out, and can also prevent external impurities from entering the toner chamber 111 to contaminate the toner, thereby avoiding toner contamination and ensuring imaging quality. During the working process of the processing box 10 of this embodiment being installed in the imaging device to provide toner, the rotating shaft 171 of the stirring frame 17 drives the flexible sheet 172 to rotate around its own axis to stir the toner in the toner chamber 111. When the stirring end of the flexible sheet 172 bends and presses against the inner side of the sealing filter 16, the sealing filter 16 is in an expanded state (such as Fig.11 As shown in the figure, at this time, since the stirring end of the flexible sheet 172 is bent and pressed against the inner side of the sealing filter 16, the mesh holes of the sealing filter 16 can be forced to elastically expand and deform, so that the mesh hole diameter D2 of the sealing filter 16 is larger than the particle size of the carbon powder, so that the carbon powder in the carbon powder chamber 111 passes through the mesh holes of the sealing filter 16 under the squeezing of the stirring end of the flexible sheet 172 to supply powder to the developing roller 15. Since the sealing filter 16 can control the amount of carbon powder passing through the powder outlet 112, it can quantitatively supply powder to the developing roller 15, so that the powder supply is uniform and stable, thereby ensuring the imaging quality.

[0031] The toner set generally consists of four independent ceramic toners, namely black ceramic toner, yellow ceramic toner, cyan ceramic toner and red ceramic toner, wherein the particle size of the three-color toner is controlled between 7 microns and 12 microns, and the particle size of the red toner is controlled between 10 microns and 20 microns, so as to prevent the toner from leaking out during the transportation and storage of the processing box 10 and to ensure that the toner can pass through the sealing filter 16 to realize the powder feeding function when the pressure of the stirring end of the flexible sheet 172 is applied after installation. The mesh number of the sealing filter 16 in this embodiment is between 30 meshes and 200 meshes. Preferably, the mesh number of the sealing filter 16 in this embodiment is between 50 meshes and 100 meshes.

[0032] In order to ensure that the sealing filter 16 can smoothly supply toner when in the expanded state, in this embodiment, when the sealing filter 16 is in the expanded state, the mesh aperture D2 of the sealing filter 16 is between 325 microns and 175 microns, so that the toner in the toner chamber 111 can be squeezed by the stirring end of the flexible sheet 172 to evenly and smoothly pass through the mesh holes of the sealing filter 16 to supply powder to the developing roller 15.

[0033] The outer dimensions of the sealing filter 16 of the present embodiment are not limited, and are related to the size of the powder outlet 112. The sealing filter 16 can be fixed to the powder outlet 112 of the powder supply bin 11 in a variety of ways, such as gluing, ultrasonic welding, hot stamping, covering with fixing parts, etc. Specifically, the sealing filter 16 of the present embodiment is provided with a fixing portion 161 around the protruding powder outlet 112, and the fixing portion 161 is installed on the powder supply bin 11. Preferably, the fixing portion 161 on the sealing filter 16 of the present embodiment is fixedly attached to the powder supply bin 11 by gluing.

[0034] In order to enable the processing box 10 to be recycled and save energy, the powder supply bin 11 of the processing box 10 of this embodiment is provided with a powder adding port 119 connected to the toner chamber 111, and a sealing cover 120 is detachably installed at the powder adding port 119, so that the powder adding port 119 can be opened to add toner to the toner chamber 111 of the powder supply bin 11.

[0035] The processing box 10 of this embodiment includes a waste toner bin 12 and a photosensitive drum 14. The photosensitive drum 14 is supported between the two end walls of the waste toner bin 12 so as to be rotatable around its own axis. The two end walls of the waste toner bin 12 are respectively connected to the two end walls of the powder supply bin 11. Further, the processing box 10 of this embodiment also includes a rotational driving force receiving head 13 and a rotational force transmission assembly. The rotational driving force receiving head 13 is arranged on one axial end of the photosensitive drum 14 and is used to receive the rotational driving force of the imaging device. The rotational force transmission assembly includes a first driving gear 114, a second driving gear 115, a third driving gear 118 and a transmission gear set. The first driving gear 114 is sleeved on the photosensitive drum 14, the second driving gear 115 is sleeved on the developing roller 15 and meshes with the first driving gear 114, and the third driving gear 118 is sleeved on the rotating shaft 171 and receives the rotational driving force of the second driving gear 115 through the transmission gear set. Therefore, the rotational driving force receiving head 13 receives the rotational driving force of the imaging device to drive the photosensitive drum 14 to rotate. Since the first driving gear 114 on the photosensitive drum 14 and the second driving gear 115 on the developing roller 15 are meshed with each other, the developing roller 15 is synchronously driven to rotate, and the third driving gear 118 on the rotating shaft 171 of the stirring frame 17 receives the rotational driving force of the second driving gear 115 on the developing roller 15 through the transmission gear group, thereby synchronously driving the rotating shaft 171 of the stirring frame 17 to rotate, so that the reception and transmission of the rotational driving force are stable and reliable.

[0036] Specifically, the transmission gear group of this embodiment includes a first transmission gear 116 and a second transmission gear 117, and the first transmission gear 116 and the second transmission gear 117 are respectively rotatably supported on one end wall of the powder supply bin 11, and the first transmission gear 116 includes a first-stage gear 1161 and a second-stage gear 1162, and the pitch circle diameter of the first-stage gear 1161 is larger than the pitch circle diameter of the second-stage gear 1162, and the second transmission gear 117 includes a third-stage gear 1171 and a fourth-stage gear 1172, and the pitch circle diameter of the third-stage gear 1171 is larger than the pitch circle diameter of the fourth-stage gear 1172, and the first-stage gear 1161 is meshed with the second drive gear 115, the second-stage gear 1162 is meshed with the third-stage gear 1171, and the fourth-stage gear 1172 is meshed with the third drive gear 118, thereby ensuring that the transmission of the rotational driving force is stable and reliable.

[0037] In addition, the processing box 10 of this embodiment also includes a first spring 19, and the two end walls of the waste powder bin 12 are rotatably hinged to the two end walls of the powder supply bin 11 in a direction perpendicular to the axis of the developing roller 15, and the two ends of the first spring 19 are respectively pressed between the powder supply bin 11 and the waste powder bin 12 so that the developing roller 15 and the photosensitive drum 14 move toward each other. Therefore, the powder supply bin 11 of the processing box 10 of the present embodiment is rotatably arranged relative to the waste powder bin 12. When the photosensitive drum 14 needs to be cleaned, the driving member of the imaging device presses against the powder supply bin 11 to force the powder supply bin 11 to rotate away from the photosensitive drum 14 in the axial direction perpendicular to the photosensitive drum 14, thereby separating the developing roller 15 from the photosensitive drum 14, and the imaging device can then perform a cleaning operation on the photosensitive drum 14. At this time, the first spring 19 is in a compressed state; when the driving member of the imaging device is separated from the powder supply bin 11, the compression and reset force of the first spring 19 forces the powder supply bin 11 to drive the developing roller 15 to move toward the photosensitive drum 14, so that the developing roller 15 contacts the photosensitive drum 14 to perform printing.

[0038] In addition, the processing box 10 of this embodiment also includes a charging roller 18 and two supporting components, and the two supporting components are respectively located at the two ends of the charging roller 18 in the axial direction of the charging roller 18, each supporting component includes a second spring 113 and a supporting ring 110, and the supporting ring 110 is provided with a supporting hole 1101. One end of the charging roller 18 is rotatably located in the supporting hole 1101, and support frames 121 are respectively provided at both ends of the waste powder bin 12. The two ends of a second spring 113 are respectively pressed between a supporting frame 121 and a supporting ring 110 to force the supporting ring 110 to move toward the photosensitive drum 14 in a direction perpendicular to the axial direction of the photosensitive drum 14, so that the charging roller 18 can always maintain contact with the photosensitive drum 14, thereby improving working stability and reliability. Specifically, each support frame 121 is provided with a limiting groove 122, and two stoppers 123 protrude from the opening of the limiting groove 122. Each support ring 110 is provided with a sliding groove 1102 on two opposite side surfaces. The two sliding grooves 1102 can be slidably engaged on the opposite side walls of the limiting groove 122, and the stoppers 123 can be pressed against the end surface of the support ring 110 away from the support frame 121, thereby improving the stability and reliability of the active cooperation of the support ring 110 relative to the support frame 121.

[0039] The above embodiments are only preferred examples of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structure, features and principles of the present invention should be included in the scope of the present invention patent application.

Claims

1. Processing box, including: A powder supply bin, wherein the powder supply bin has a toner cavity for accommodating toner, and the toner cavity has a powder outlet; A developing roller, the developing roller is rotatably supported around its own axis between the two end walls of the powder supply bin, and the developing roller is located outside the powder outlet away from the toner chamber; Characterized in that the processing box also includes: A sealing filter screen, wherein the sealing filter screen is arranged at the powder outlet and completely covers the powder outlet, and the mesh aperture of the sealing filter screen can be elastically changed between a sealed state and an expanded state; A stirring frame, the stirring frame comprises a rotating shaft and a flexible sheet, the rotating shaft is rotatably supported around its own axis between the two end walls of the powder supply bin and is located in the carbon powder chamber, the mounting end of the flexible sheet is arranged on the rotating shaft, the stirring end of the flexible sheet is convexly arranged in the radial direction of the rotating shaft, and the stirring end of the flexible sheet is bent and pressed against the inner peripheral wall of the carbon powder chamber or the inner side surface of the sealing filter close to the carbon powder chamber; In the sealed state, the mesh aperture is smaller than the particle size of the carbon powder, and the stirring end of the flexible sheet is bent and pressed against the inner wall of the carbon powder chamber; in the expanded state, the stirring end of the flexible sheet is bent and pressed against the inner side surface of the sealing filter to force the mesh aperture to be larger than the particle size of the carbon powder.

2. The process cartridge according to claim 1, wherein: The mesh number of the sealing filter is between 30 mesh and 200 mesh; And / or, in the expanded state, the mesh aperture is between 325 microns and 175 microns.

3. The process cartridge according to claim 2, wherein: The mesh number of the sealing filter is between 50 meshes and 100 meshes.

4. The process cartridge according to claim 1, wherein: The sealing filter screen is protruded around the powder outlet and is provided with a fixing part, which is installed on the powder supply bin.

5. The process cartridge according to claim 1, wherein: The powder supply bin is provided with a powder adding port communicating with the carbon powder chamber, and a sealing cover is detachably mounted at the powder adding port.

6. The process cartridge according to any one of claims 1 to 5, characterized in that: The processing box comprises a waste toner bin and a photosensitive drum. The photosensitive drum is rotatably supported around its own axis between the two end walls of the waste toner bin. The two end walls of the waste toner bin are respectively connected to the two end walls of the powder supply bin.

7. The process cartridge according to claim 6, wherein: The process cartridge further comprises a rotational driving force receiving head and a rotational force transmitting assembly, wherein the rotational driving force receiving head is disposed on one axial end of the photosensitive drum and is used to receive the rotational driving force of the imaging device; The rotational force transmission assembly includes a first driving gear, a second driving gear, a third driving gear and a transmission gear group, the first driving gear is sleeved on the photosensitive drum, the second driving gear is sleeved on the developing roller and meshes with the first driving gear, and the third driving gear is sleeved on the rotating shaft and receives the rotational driving force of the second driving gear through the transmission gear group.

8. The process cartridge according to claim 7, wherein: The transmission gear set includes a first transmission gear and a second transmission gear, the first transmission gear and the second transmission gear are respectively rotatably supported on one end wall of the powder supply bin, the first transmission gear includes a primary gear and a secondary gear, the pitch circle diameter of the primary gear is larger than the pitch circle diameter of the secondary gear, and the second transmission gear includes a third gear and a fourth gear, the pitch circle diameter of the third gear is larger than the pitch circle diameter of the fourth gear; The first-stage gear is meshed with the second driving gear, the second-stage gear is meshed with the third-stage gear, and the fourth-stage gear is meshed with the third driving gear.

9. The process cartridge according to claim 6, wherein: The processing box also includes a first spring, and the two end walls of the waste powder bin are respectively rotatably hinged to the two end walls of the powder supply bin in a direction perpendicular to the axis of the developing roller, and the two ends of the first spring are respectively pressed between the powder supply bin and the waste powder bin to make the developing roller and the photosensitive drum move toward each other.

10. The process cartridge according to claim 6, wherein: The processing box also includes a charging roller and two supporting assemblies, wherein the two supporting assemblies are respectively located at two ends of the charging roller in the axial direction of the charging roller; Each of the supporting assemblies includes a second spring and a supporting ring, the supporting ring is provided with a supporting hole, one end of the charging roller is rotatably located in the supporting hole, and supporting frames are respectively provided at both ends of the waste toner bin, and the two ends of a second spring are respectively pressed between a supporting frame and a supporting ring to force the supporting ring to move toward the photosensitive drum in an axial direction perpendicular to the photosensitive drum.

Images