Developing cartridge, toner cartridge, and electronic image forming apparatus

Abstract

The application provides a developing box, a selenium drum frame and an electronic imaging device. The electronic imaging device comprises the developing box and the selenium drum frame. The developing box comprises a box body and an end cover. The box body is provided with a developing roller, a powder feeding roller and a stirring frame. The stirring frame is provided with a rotating shaft. The axial direction of the developing roller, the axial direction of the powder feeding roller and the axial direction of the rotating shaft are parallel to each other. The end cover is detachably arranged on the box body and located in the axial direction of the rotating shaft. The side of the end cover facing the box body is provided with a positioning protrusion. The selenium drum frame is provided with an elastic assembly. The elastic assembly comprises a spring and an abutting block. The spring is connected between the selenium drum frame and the abutting block. The spring drives the abutting block to abut against the positioning protrusion. When the developing box and the drum frame are not matched, the positioning protrusion on the end cover can be replaced or the end cover can be replaced. Other components on the box body do not need to be disassembled, replaced and reinstalled after the box body is replaced. The installation efficiency of the developing box is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of carbon powder imaging equipment, in particular to a developing box, a selenium drum frame and an electronic imaging equipment. BACKGROUND

[0002] The existing electronic photographic imaging equipment such as laser printer is provided with a detachable developing box. The developing box comprises a shell and a developing box body. The split type developing box is provided with a rotatable developing roller, a rotatable powder feeding roller, a rotatable stirring frame and a powder outlet knife. The shell covers the chamber of the developing box body provided with the stirring frame. The developing roller gear is arranged on the developing box body. The stirring frame gear and the powder feeding roller gear are driven to rotate by driving the developing roller gear to rotate, so as to realize the work of the developing box.

[0003] In the electronic photographic imaging equipment, when the developing box is detachably mounted on the selenium drum frame, the developing box has a positioning member for positioning and clamping when the developing box is connected with the selenium drum frame. When the developing box is mounted on the selenium drum frame, the positioning member on the developing box is in contact with the elastic member of the bottom surface of the selenium drum frame, and the positioning member extrudes the elastic member on the selenium drum frame. The elastic member of the selenium drum frame lifts the developing box to the upper left of the selenium drum frame. Under the action of other fixing structures, the developing box is elastically abutted and mounted on the selenium drum frame.

[0004] Since the main parts such as the gear assembly in the transmission system and the positioning member on the developing box are arranged on the box body respectively, but different developing boxes correspond to different selenium drum frames, different positioning members need to be arranged. When different developing boxes are positioned on the selenium drum frame, only the developing box body provided with the positioning member can be replaced. Therefore, the transmission system, the developing roller and the powder feeding roller and other components on the developing box body need to be disassembled and reinstalled, thereby increasing the assembly difficulty of the developing box body. SUMMARY

[0005] The first object of the present application is to provide a developing box which reduces the assembly difficulty of the box body.

[0006] The second object of the present application is to provide a selenium drum frame comprising the above-mentioned developing box.

[0007] The third object of the present application is to provide an electronic imaging equipment comprising the above-mentioned developing box and selenium drum frame.

[0008] In order to achieve the above-mentioned first object, the developing box provided by the present application comprises a box body and an end cover. The box body is provided with a developing roller, a powder feeding roller and a stirring frame. A rotating shaft is arranged on the stirring frame. The axial direction of the developing roller, the axial direction of the powder feeding roller and the axial direction of the rotating shaft are parallel to each other. The end cover is detachably arranged on the box body and located in the axial direction of the rotating shaft. A positioning protrusion is arranged on the side of the end cover facing the box body.

[0009] From the above scheme, it can be seen that the end cover is arranged on the box body through a detachable structure, and the positioning protrusion for realizing the positioning and connecting of the developing box and the selenium drum frame is arranged on the end cover. When the developing box is not matched with the drum frame, the positioning protrusion on the end cover can be replaced or the end cover is replaced, so that the positioning protrusion on the replaced end cover can be matched with the elastic component on the selenium drum frame, thereby avoiding the need to disassemble other components on the box body, replace the box body and then reinstall, and effectively improving the installation efficiency of the developing box.

[0010] Further, the box body is provided with a gear transmission assembly, the gear transmission assembly drives the developing roller, the powder feeding roller and the stirring frame to rotate respectively, the end cover covers the gear transmission assembly, and the protruding direction of the positioning protrusion extends along the axial direction of the developing roller and towards the gear transmission assembly.

[0011] It can be seen that, since the end cover covers the gear transmission assembly, there is a certain installation space between the end cover and the box body, and the positioning protrusion is towards the installation space, so that the positioning protrusion is arranged in the installation space, so that the components of the developing box are more concentrated, and the positioning protrusion is prevented from protruding away from the box body relative to the end cover, so that the length of the developing box is lengthened and the installation of the developing box is affected.

[0012] Further, the developing box comprises an outer cover, the box body is provided with a carbon powder placing cavity, the outer cover covers the carbon powder placing cavity, and the gear transmission assembly is arranged between the outer cover and the positioning protrusion.

[0013] It can be seen that the gear transmission assembly is arranged between the outer cover and the positioning protrusion, so that the positioning protrusion is close to the bottom of the developing box, thereby being closer to the elastic component on the selenium drum frame and being more closely connected with each other.

[0014] Further, along the paper feeding direction of the developing box, the stirring frame, the powder feeding roller, the developing roller and the paper outlet of the developing box are arranged in sequence, and the positioning protrusion is located between the powder feeding roller and the stirring frame.

[0015] It can be seen that the powder feeding roller and the developing roller are close to each other, and there is a larger installation space between the stirring frame and the powder feeding roller, and the positioning protrusion is located between the powder feeding roller and the stirring frame, thereby reducing the influence of the positioning protrusion on other components of the developing box.

[0016] Further, the end cover is arranged at least one of the two ends along the axial direction of the rotating shaft of the box body.

[0017] To achieve the second purpose, the selenium drum frame is provided with an elastic component, the elastic component is used to abut against the positioning protrusion of the developing box, the elastic component comprises a spring and an abutting block, the spring is connected between the selenium drum frame and the abutting block, and the spring drives the abutting block to abut against the positioning protrusion.

[0018] It can be seen that when the developing cartridge is installed on the selenium drum frame, the positioning protrusion abuts against the abutting block and compresses the spring, thereby realizing positioning of the developing cartridge on the selenium drum frame, enabling components on the developing cartridge to accurately cooperate with components on the printer, and ensuring normal operation of the printer.

[0019] Further, the abutting block is provided with a guide slope and a supporting slope, the guide slope and the supporting slope are located on a side of the abutting block away from the spring, the guide slope is located above the supporting slope based on the bottom of the selenium drum frame, and an included angle between the guide slope and the bottom of the selenium drum frame is greater than an included angle between the supporting slope and the bottom of the selenium drum frame.

[0020] It can be seen that the guide slope and the supporting slope have different included angles with the bottom of the selenium drum frame, the guide slope guides the positioning protrusion to move to the supporting slope, the supporting slope supports the positioning protrusion, and the guide slope and the supporting slope are respectively adjacent to the positioning protrusion, so that the positioning protrusion accurately compresses the spring, and when the developing cartridge is disassembled from the selenium drum frame, the bending between the guide slope and the supporting slope can accurately pop up the positioning protrusion while reducing the possibility of deviation of the positioning protrusion in the process of popping up.

[0021] Further, the elastic assembly comprises a limiting assembly, the limiting assembly comprises a first fixed plate, a first limiting plate and a second limiting plate, the first limiting plate and the second limiting plate are oppositely arranged, the first fixed plate, the spring and the abutting block are respectively arranged between the first limiting plate and the second limiting plate, and one end of the spring is arranged on the first fixed plate.

[0022] It can be seen that the elastic assembly is arranged between the first limiting plate and the second limiting plate, so that the elastic block moves between the first limiting plate and the second limiting plate, the direction of the elastic force of the spring is fixed, and the positioning protrusion can be quickly and accurately popped up.

[0023] Further, the side wall of the end cover away from the cartridge body is provided with a protruding clamping column, the selenium drum frame is provided with a clamping groove, the opening direction of the clamping groove is opposite to the direction of the elastic force of the spring, and the protruding clamping column is located in the clamping groove.

[0024] It can be seen that the protruding clamping column on the end cover is matched with the clamping groove on the selenium drum frame, so that the end cover and the selenium drum frame are connected.

[0025] To achieve the third purpose, the electronic imaging device provided by the application comprises a selenium drum frame and a developing cartridge, the developing cartridge is the developing cartridge described above, the selenium drum frame is the selenium drum frame described above, and the developing cartridge is arranged on the selenium drum frame. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a perspective view of an embodiment of the developing cartridge of the application.

[0027] Figure 2is an exploded view of the developing box embodiment of the present application.

[0028] Figure 3 is a perspective view of the selenium drum holder embodiment of the present application.

[0029] Figure 4 is Figure 3 is an enlarged view of A.

[0030] Figure 5 is a matching connection view of the developing box embodiment of the present application and the selenium drum holder.

[0031] Figure 6 is a sectional view of the matching connection of the developing box embodiment of the present application and the selenium drum holder.

[0032] Figure 7 is a matching connection view of the developing box embodiment of the present application and the selenium drum holder from another perspective.

[0033] Figure 8 is Figure 7 is an enlarged view of B.

[0034] The present application is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0035] The electronic imaging device of the present application can be a printer or a copier, wherein the developing box and the selenium drum holder are necessary components in the working process of the electronic imaging device. The developing box of the present application is provided with a positioning protrusion on the detachable end cover, which matches with the elastic component on the selenium drum holder. Since the positioning protrusion is arranged on the end cover, and the end cover is detachable, when the developing box is matched and connected with different selenium drum holders, only the end cover needs to be replaced, without the need of dismounting and reinstalling the components on the box body, thus effectively improving the working efficiency.

[0036] Referring to Figure 1 , the developing box 1 comprises an outer cover 11, a box body 12, a gear transmission assembly 13 and at least one end cover 14. The box body 12 is provided with a developing roller 15, a powder feeding roller 16 and a carbon powder placing cavity 17. The carbon powder placing cavity 17 is provided with a stirring frame 18, and the stirring frame 18 is provided with a rotating shaft 181. The axial direction of the developing roller 15, the axial direction of the powder feeding roller 16 and the axial direction of the rotating shaft 181 are parallel to each other. The gear transmission assembly 13 is arranged in the axial direction of the rotating shaft 181, and is used to drive the developing roller 15, the powder feeding roller 16 and the stirring frame 18 to rotate. In this embodiment, the developing box 1 is a split type developing box 1.

[0037] The at least one end cover 14 is detachably arranged on the cartridge body 12, and the at least one end cover 14 is located in the axial direction of the rotation shaft 181. If two end covers 14 are arranged on the developing cartridge 1, the two end covers 14 are located in the axial direction of the rotation shaft 181, and the two end covers 14 are oppositely arranged along the axial direction of the rotation shaft 181. If one end cover 14 is arranged on the developing cartridge 1, the end cover 14 is arranged on one of the two ends of the cartridge body 12 along the axial direction of the rotation shaft 181. The end cover 14 is provided with a positioning protrusion 2 on the side facing the cartridge body 12. Since the end cover 14 is arranged on the cartridge body 12 by a detachable structure, the positioning protrusion 2 for realizing the positioning connection between the developing cartridge 1 and the drum holder is arranged on the end cover 14. When the developing cartridge 1 is not matched with the drum holder, the positioning protrusion 2 on the end cover 14 can be replaced or the end cover 14 is replaced, so that the positioning protrusion 2 on the replaced end cover 14 can be matched with the elastic assembly on the drum holder, thereby avoiding the disassembly and replacement of other components on the cartridge body 12 after the replacement of the cartridge body 12 and the reinstallation, and effectively improving the installation efficiency of the developing cartridge 1. In this embodiment, a plurality of assembly holes 141 are arranged on the end cover 14, and a plurality of assembly columns 121 are arranged on the side wall of the cartridge body 12 facing the end cover 14. The assembly holes 141 on the end cover 14 correspond to the assembly columns 121 on the cartridge body 12 one by one, and the assembly holes 141 on the end cover 14 and the assembly columns 121 on the cartridge body 12 are connected by bolts, so that the end cover 14 is detachably arranged on the cartridge body 12.

[0038] Referring to Figure 2In the embodiment, the end cover 14 and the gear transmission assembly 13 are installed on the same side of the cartridge body 12, and the end cover 14 covers the gear transmission assembly 13, i.e. the gear transmission assembly 13 is arranged between the cartridge body 12 and the end cover 14, so that the intermediate transmission member between the gear transmission assembly 13 and the rotating member on the cartridge body 12 can be reduced. The end cover 14 covers the gear transmission assembly 13 in the following manner: an open mounting chamber 142 is arranged on the side wall of the end cover 14 facing the gear transmission assembly 13, and a mounting space with a certain volume is formed between the open mounting chamber 142 and the cartridge body 12, and the gear transmission assembly 13 is arranged in the mounting space. The positioning protrusion 2 on the end cover 14 is arranged in the mounting chamber 142, and the positioning protrusion 2 protrudes in the axial direction of the developing roller 15 towards the gear transmission assembly 13, so that the components on the developing cartridge 1 are better concentrated in the mounting space, and the positioning protrusion 2 is prevented from protruding in the direction away from the cartridge body 12 of the end cover 14, so that the length of the developing cartridge 1 is lengthened, and the installation of the developing cartridge 1 is affected. In the developing cartridge 1, the outer cover 11 is used to cover the carbon powder placing cavity 17 outside, and when the carbon powder placing cavity 17 is the bottom, in the direction from the outer cover 11 to the carbon powder placing cavity 17, i.e. in the downward direction, the gear transmission assembly 13 is arranged between the outer cover 11 and the positioning protrusion 2, the positioning protrusion 2 is arranged between the gear transmission assembly 13 and the carbon powder placing cavity 17, and in the direction from the developing roller 15 to the carbon powder placing cavity 17, or in the paper feeding direction of the developing cartridge 1, the stirring frame 18, the powder feeding roller 16, the developing roller 15 and the paper outlet of the developing cartridge 1 are arranged in sequence, and the positioning protrusion 2 is located between the powder feeding roller 16 and the stirring frame 18; because the transfer roller and the developing roller 15 are close to each other, there is more installation space between the stirring frame 18 and the powder feeding roller 16, and the positioning protrusion 2 is located between the powder feeding roller 16 and the stirring frame 18 and the positioning protrusion 2 is located between the gear transmission assembly 13 and the bottom of the carbon powder placing cavity 17, which is beneficial to reduce the influence of the arrangement of the positioning protrusion 2 on other components of the developing cartridge 1.

[0039] The positioning protrusion 2 is arranged on the end cover 14 in a fixed manner or a detachable manner. In the embodiment, the positioning protrusion 2 is arranged on the end cover 14 in a fixed direction, and the positioning protrusion 2 is arranged in an integral manner with the end cover 14. As another embodiment, when the positioning protrusion 2 is arranged on the end cover 14 in a detachable manner, the positioning protrusion 2 can be a positioning column, and a first assembly hole can be arranged on the positioning column. A second assembly hole is arranged on the end cover 14. The first assembly hole on the positioning column and the second assembly hole on the end cover 14 are correspondingly connected, and then a bolt is used for connection. When the developing cartridge 1 needs to be matched with other selenium drum frames and the positioning protrusion 2 needs to be replaced, the positioning protrusion 2 can be arranged on a connecting block. The connecting block can be provided with different lengths to adapt to different selenium drum frames, and the connecting block can be connected with the end cover 14 through the assembly hole and the bolt. In order to avoid the connecting block being arranged away from the side wall protrusion of the cartridge body 12 relative to the end cover 14, a stepped avoiding portion can be arranged on the connecting block, and the assembly hole on the connecting block is located at the stepped avoiding portion.

[0040] Referring to Figure 3 The selenium drum frame 3 is installed in the electronic imaging equipment, and the elastic assembly 4 is arranged on the selenium drum frame 3. The elastic assembly 4 is used to abut against the positioning protrusion 2 of the developing cartridge 1, so as to realize the positioning and installation of the developing cartridge 1 in the electronic imaging equipment, and make the components on the developing cartridge 1 cooperate with the components in the electronic imaging equipment, such as the developing roller 15 on the developing cartridge 1 and the photosensitive roller in the electronic imaging equipment.

[0041] In the embodiment, two groups of elastic assemblies 4 are arranged on the selenium drum frame 3. The positions of the two groups of elastic assemblies 4 are respectively set corresponding to the positions of the end covers 14 on the two ends of the developing cartridge 1 along the rotation axis 181. One group of elastic assemblies 4 can correspond to one end cover 14. The selenium drum frame 3 is provided with two groups of elastic assemblies 4, which can adapt to the developing cartridges 1 with different numbers of end covers 14.

[0042] Referring to Figure 4The elastic assembly 4 includes a spring 41 and an abutting block 42, the spring 41 is connected between the selenium drum holder 3 and the abutting block 42, and the spring 41 drives the abutting block 42 to abut the positioning protrusion 2. The abutting block 42 is provided with a guide slope 421 and a supporting slope 422, the guide slope 421 and the supporting slope 422 are located on the side of the abutting block 42 away from the spring 41, based on the bottom of the selenium drum holder 3, the guide slope 421 is located above the supporting slope 422, and the included angle between the guide slope 421 and the bottom of the selenium drum holder 3 is greater than the included angle between the supporting slope 422 and the bottom of the selenium drum holder 3; the included angles of the guide slope 421, the supporting slope 422 and the bottom of the selenium drum holder 3 are different, the guide slope 421 is arranged to guide the positioning protrusion 2 to move to the supporting slope 422, the supporting slope 422 supports the positioning protrusion 2, and the guide slope 421 and the supporting slope 422 abut the positioning protrusion 2 respectively, so that the positioning protrusion 2 is accurately compressed to the spring 41, and when the developing cartridge 1 is disassembled from the selenium drum holder 3, the bending between the guide slope 421 and the supporting slope 422 can accurately pop up the positioning protrusion 2 while reducing the possibility of deviation of the positioning protrusion 2 in the process of popping up. The elastic assembly 4 includes a limiting assembly 43, which is used to fix the elastic direction of the spring 41, so that the positioning protrusion 2 can be quickly and accurately popped up, the limiting assembly includes a first fixed plate 433, a first limiting plate 431 and a second limiting plate 432, the first limiting plate 431 and the second limiting plate 432 are arranged opposite to each other, the first fixed plate 433, the spring 41 and the abutting block 42 are arranged between the first limiting plate 431 and the second limiting plate 432 respectively, and one end of the spring 41 is arranged on the first fixed plate 422.

[0043] Referring to Figure 5 In the embodiment, the end cover 14 is provided with a protruding clamping column on the side wall away from the cartridge body 12, and the selenium drum holder 3 is provided with a clamping groove 31, and the opening direction of the clamping groove 31 is opposite to the elastic direction of the spring 41. Referring to Figure 6 When the developing cartridge 1 is arranged on the selenium drum holder 3, the developing cartridge 1 is inclined to enter the electronic imaging equipment, so that the protruding clamping column is clamped in the clamping groove 31, and the cartridge body 12 presses the elastic assembly 4 on the selenium drum holder 3, thereby completing the positioning of the developing cartridge 1 on the selenium drum holder 3, and then the developing cartridge 1 is fixed on the selenium drum holder 3 through the fixing structure, so that it is fixed on the selenium drum holder 3 to maintain the working state; since the opening direction of the clamping groove 31 is opposite to the elastic direction of the spring 41, the protruding clamping column moves away from the opening of the clamping groove 31 under the action of the elastic force of the spring 41, so that the protruding clamping column is stably located in the clamping groove 31, thereby maintaining the positioning state of the developing cartridge 1 on the selenium drum holder 3. In the embodiment, referring to Figure 7 and Figure 8The fixing structure of the developing cartridge 1 on the selenium drum frame 3 is that a fixing column 19 is arranged on the side wall of one end of the developing cartridge 1 along the rotation axis 181, the fixing column 19 is arranged protruding based on the cartridge body 12, and the fixing column 19 extends along the axial direction of the rotation axis 181. The locking block 32 and the compression spring are arranged on the selenium drum frame 3 opposite the fixing column 19, the locking block 32 comprises a handle block 321, a rotation connecting rod 322 and a locking block 323, the rotation connecting rod 322 penetrates the side wall of the selenium drum frame 3, the handle block 321 and the locking block 323 are connected with the axial two ends of the rotation connecting rod 322 respectively, the handle block 321 is located outside the selenium drum frame 3, and the handle block 321 protrudes along the radial direction of the rotation connecting rod 322. The locking block 323 is located inside the selenium drum frame 3, the locking block 323 protrudes along the radial direction of the rotation connecting rod 322, the free end of the locking block 323 is provided with a hooking part 324, the hooking part 324 is used for hooking the fixing column 19, and the clamping spring is sleeved outside the rotation connecting rod 322, and the two ends of the clamping spring are respectively adjacent to the handle block 321 and the locking block 323. When the selenium drum frame 3 fixes the developing cartridge 1, the handle block 321 is rotated to drive the locking block 323 to rotate, so that the hooking part 324 on the locking block 323 is tightly hooked with the fixing column 19, and the developing cartridge 1 is fixed on the selenium drum frame 3. When it is needed to remove the developing cartridge 1 on the selenium drum frame 3, the handle block 321 is only driven to make the locking block 323 release the fixing column 19, and then the protruding clamping column is taken out from the clamping groove 31, and the removal of the developing cartridge 1 on the selenium drum frame 3 is completed.

[0044] In the embodiment, the positioning protrusion 2 is provided with an avoiding part 21, the avoiding part 21 is used for avoiding the components on the cartridge body 12, and interference between the two components is avoided.

[0045] The electronic imaging equipment provided by the application comprises the selenium drum frame 3 and the developing cartridge 1, the developing cartridge 1 is the developing cartridge 1 as described above, the selenium drum frame 3 is the selenium drum frame 3 as described above, and the developing cartridge 1 is arranged on the selenium drum frame 3.

[0046] Finally, it should be emphasized that the above is only the preferred embodiment of the application, and is not used to limit the application, and the application can have various changes and modifications for the person skilled in the art, and any modification, equivalent replacement, improvement and the like within the spirit and principle of the application should be included in the protection range of the application.

Claims

1. A process cartridge, characterized by: The developing box comprises a box body and an end cover, the box body is provided with a developing roller, a powder feeding roller and a stirring frame, the stirring frame is provided with a rotating shaft, the axial direction of the developing roller, the axial direction of the powder feeding roller and the axial direction of the rotating shaft are parallel to each other, the end cover is detachably arranged on the box body, the end cover is located in the axial direction of the rotating shaft, and a positioning protrusion is arranged on the side of the end cover facing the box body. The positioning protrusion is integrally formed with the end cover, or The positioning protrusion is detachably mounted on the end cover. The box body is provided with a gear transmission assembly, the gear transmission assembly drives the developing roller, the powder feeding roller and the stirring frame to rotate respectively, the end cover covers the gear transmission assembly, and the protruding direction of the positioning protrusion extends along the axial direction of the developing roller and towards the gear transmission assembly. The positioning protrusion is located between the powder feeding roller and the stirring frame, the positioning protrusion is located between the gear transmission assembly and the bottom of the carbon powder placing cavity, the positioning protrusion is used for adapting to an elastic assembly on a selenium drum frame, and the positioning of the developing box on the selenium drum frame is realized.

2. The developing box according to claim 1, wherein: The developing box comprises an outer cover, the box body is provided with the carbon powder placing cavity, the outer cover covers the carbon powder placing cavity, and the gear transmission assembly is arranged between the outer cover and the positioning protrusion.

3. The developing box according to claim 1, wherein: Along the paper feeding direction of the developing box, the stirring frame, the powder feeding roller, the developing roller and the paper outlet of the developing box are arranged in sequence.

4. The developing box according to any one of claims 1 to 3, wherein: At least one of the two ends of the box body along the axial direction of the rotating shaft is provided with the end cover.

5. A toner cartridge holder characterized by: The selenium drum frame is provided with an elastic assembly, the elastic assembly is used for abutting against the positioning protrusion of the developing box according to any one of claims 1 to 4, the elastic assembly comprises a spring and an abutting block, the spring is connected between the selenium drum frame and the abutting block, and the spring drives the abutting block to abut against the positioning protrusion.

6. The selenium drum frame according to claim 5, wherein: The abutting block is provided with a guide inclined surface and a supporting inclined surface, the guide inclined surface and the supporting inclined surface are located on the side of the abutting block away from the spring, the guide inclined surface is located above the supporting inclined surface based on the bottom of the selenium drum frame, and the included angle between the guide inclined surface and the bottom of the selenium drum frame is greater than the included angle between the supporting inclined surface and the bottom of the selenium drum frame.

7. The selenium drum frame according to claim 5, wherein: The elastic assembly comprises a limiting assembly, the limiting assembly comprises a first fixed plate, a first limiting plate and a second limiting plate, the first limiting plate and the second limiting plate are oppositely arranged, the first fixed plate, the spring and the abutting block are arranged between the first limiting plate and the second limiting plate respectively, and one end of the spring is arranged on the first fixed plate.

8. The selenium drum frame according to claim 5, wherein: The end cover is provided with a protruding clamping column on the side wall away from the box body, the selenium drum frame is provided with a clamping groove, the opening direction of the clamping groove is opposite to the elastic force direction of the spring, and the protruding clamping column is located in the clamping groove.

9. An electrophotographic image forming apparatus, characterized by: The selenium drum frame and the developing box are included, the developing box is the developing box as claimed in any one of claims 1 to 4, the selenium drum frame is the selenium drum frame as claimed in any one of claims 5 to 8, and the developing box is arranged on the selenium drum frame.

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