Split box and pre-installation method thereof

Abstract

The application provides a split box and a pre-installation method thereof. The split box comprises a drum assembly and a developing assembly. The drum assembly comprises a drum frame and a photosensitive drum. The drum frame is provided with a mounting position, a first fixed matching part and two positioning grooves. The photosensitive drum and the first fixed matching part are respectively arranged on both sides of the mounting position in the X direction. The two positioning grooves are respectively arranged on both sides of the mounting position in the Y direction. The positioning grooves extend along the Y direction. The developing assembly comprises a developing box and a developing roller. The developing box is provided with a second fixed matching part and two positioning columns. The developing roller and the second fixed matching part are respectively arranged on both sides of the developing box in the X direction. The two positioning columns are respectively arranged on both sides of the developing box in the Y direction. The developing roller is connected with the photosensitive drum in a matching mode. The positioning columns are positioned and matched with the positioning grooves to limit the separation of the developing assembly and the drum assembly in the X direction. The second fixed matching part is detachably connected with the first fixed matching part to limit the separation of the developing assembly and the drum assembly in the Z direction. The application has the advantages of simple structure and convenient assembly.

Description

Technical Field

[0001] This invention relates to the field of imaging equipment technology, specifically to a split box and its pre-installation method. Background Technology

[0002] Currently, image forming equipment typically includes consumable components, optical scanning components, developing components, and control components. Among these, the processing cartridge is one of the most commonly used consumables, and it can be divided into two types: integrated and separate. The separate processing cartridge includes a detachably connected drum assembly and developing assembly. When the developer runs out, the user only needs to replace the developing assembly, eliminating the need to discard the drum assembly. This improves ease of use and is also beneficial for environmental protection and resource conservation.

[0003] With continuous advancements in materials technology, the lifespan of drum assemblies is constantly being extended, while the developer cartridge, due to its smaller toner capacity, requires frequent replacement. This not only wastes raw materials, contradicting the concept of green environmental protection, but also easily affects print quality due to improper installation and positioning. Furthermore, the existing connection structure between the drum assembly and the developer assembly is relatively complex, making assembly difficult and causing inconvenience for manufacturers and users in disassembly and assembly operations. Summary of the Invention

[0004] The primary objective of this invention is to provide a modular box that is simple in structure and easy to assemble and disassemble.

[0005] A second objective of this invention is to provide a pre-installation method for the aforementioned split box.

[0006] To achieve the aforementioned first objective, the present invention provides a split-type cartridge comprising a detachably connected drum assembly and a developing assembly. The drum assembly includes a drum frame and a photosensitive drum. The drum frame is provided with a mounting position, a first fixed fitting part, and two positioning grooves. The photosensitive drum and the first fixed fitting part are respectively located on both sides of the mounting position in the X direction, and the two positioning grooves are respectively located on both sides of the mounting position in the Y direction, extending along the Y direction. The developing assembly includes a developing cartridge and a developing roller. The developing cartridge is provided with a second fixed fitting part and two positioning posts. The developing roller and the second fixed fitting part are respectively located on both sides of the developing cartridge in the X direction, and the two positioning posts are respectively located on both sides of the developing cartridge in the Y direction. The developing roller is connected to the photosensitive drum, and the positioning posts are positioned and fitted with the positioning grooves to restrict the separation of the developing assembly from the drum assembly in the X direction. The second fixed fitting part is detachably connected to the first fixed fitting part to restrict the separation of the developing assembly from the drum assembly in the Z direction. The X, Y, and Z directions are perpendicular to each other.

[0007] As can be seen from the above solution, by setting the precise cooperation between the positioning post and the positioning groove, the rapid alignment and installation of the developing assembly and the drum frame are achieved, effectively ensuring the preset distance between the developing roller and the photosensitive drum, thus guaranteeing print quality from the source. At the same time, the second fixing part is detachably connected to the first fixing part, which can effectively limit the two in the Z direction to prevent accidental loosening during transportation or use. The connection structure design of the drum assembly and the developing assembly of this invention is simple, which not only greatly reduces the difficulty of production and disassembly, making it convenient for users and manufacturers to operate, but also has high assembly stability, which is conducive to maintaining stable imaging effect in the long term.

[0008] A further design involves providing arms on both sides of the mounting position in the Y direction, with positioning grooves on the arms. The end of the developing cartridge in the Y direction is adjacent to or abuts against the corresponding arm to restrict the separation of the developing assembly and the drum assembly from the Y direction. The developing cartridge is equipped with a toner cartridge and an auxiliary toner cartridge. The developing roller is located at the outlet of the toner cartridge, and the auxiliary toner cartridge protrudes from the surface of the developing cartridge and is connected to the toner cartridge.

[0009] As can be seen from the above solution, by setting up an additional toner compartment connected to the original toner compartment, the total toner storage capacity of the developing cartridge is effectively expanded, which can significantly extend the single service life of the developing component and make it more compatible with the life cycle of the drum component. This greatly reduces the replacement frequency of the developing component. On the one hand, it reduces the user's maintenance burden and improves the user experience. On the other hand, it reduces the number of waste cartridges from the source, which is more in line with the development concept of green environmental protection and resource conservation.

[0010] A further option is to fix the first fixed mating part and the second fixed mating part together by using a first sticker.

[0011] As can be seen from the above scheme, the above settings achieve a stable connection between the developing component and the drum component. The overall structure is simple and compact, and the assembly operation is convenient and efficient, which has good practicality and promotion value.

[0012] A further embodiment is that the first fixing part includes a step part and a first adhesive part. The step part is located on the side of the first adhesive part near the installation position and is lower than the first adhesive part in the Z direction. The second fixing part is a boss, which overlaps the step part. The first sticker is respectively adhered to the boss and the first adhesive part.

[0013] As can be seen from the above scheme, on the one hand, the overlapping fit between the boss and the step can limit the developing assembly downward in the Z direction, preventing it from detaching from the drum frame; on the other hand, the first sticker is adhered between the boss and the first adhesive part, which can limit the developing assembly upward in the Z direction. Through bidirectional constraint, the installation stability of the developing assembly on the drum frame is effectively ensured.

[0014] A further option is to lock the first fixed mating part and the second fixed mating part together with a connector.

[0015] As can be seen from the above scheme, the fixed assembly of the developing component and the drum component can be easily achieved through the above settings. The overall structure is simple, the assembly operation is convenient, and it has good practicality and reliability.

[0016] A further option is that the first fixed fitting part is a first mounting hole, the second fixed fitting part is a second mounting hole, and the connector passes through the first mounting hole and connects to the second mounting hole.

[0017] A further option is to have the first fixed mating part and the second fixed mating part snap together.

[0018] As can be seen from the above scheme, the developing assembly and drum assembly can be quickly assembled without the need for additional fasteners. The overall structure is simple and compact, and the assembly operation is convenient and efficient, with good practicality and reliability.

[0019] A further embodiment is that the first fixed fitting part is a first protrusion, which protrudes towards the mounting position. The first protrusion is provided with a first inclined surface and a first stop surface. The first inclined surface is located above the first stop surface and extends downward along the Z direction. The first stop surface is parallel to the XY plane. The second fixed fitting part is a second protrusion, which is provided with a second inclined surface and a second stop surface. The second inclined surface is fitted with the first inclined surface, and the second stop surface is parallel to and abuts against the first stop surface.

[0020] As can be seen from the above scheme, the sliding engagement of the first inclined surface and the second inclined surface can guide the developing component to be smoothly installed into the drum frame from top to bottom; when the assembly is in place, the first stop surface and the second stop surface form a limiting abutment in the Z direction, which can effectively prevent the developing component from coming off the drum frame upward; this snap-fit ​​structure has both guiding assembly and anti-detachment limiting functions, and the structure is simple and reliable.

[0021] A further solution is that the separate box is also equipped with a release paper and a second sticker; the release paper is a single sheet, with the middle of the release paper placed between the photosensitive drum and the developing roller, and the two ends of the release paper extending to both sides of the drum assembly in the Z direction respectively; the first end of the second sticker is pasted between the release paper and the upper surface of the drum assembly, and the second end of the second sticker is pasted between the release paper and the lower surface of the drum assembly. Alternatively, two release sheets can be used. One end of the first release sheet is placed between the photosensitive drum and the charging roller, and the other end of the first release sheet extends to one side of the drum assembly in the Z direction. The middle of the second release sheet is placed between the photosensitive drum and the developing roller, and both ends of the second release sheet extend to both sides of the drum assembly in the Z direction. The first end of the second sticker is pasted between the same end of the two release sheets and the upper surface of the drum assembly, and the second end of the second sticker is pasted between the second release sheet and the lower surface of the drum assembly.

[0022] As can be seen from the above scheme, by setting up isolation paper, the photosensitive drum can be separated from the developing roller and the charging roller, thereby avoiding contact between the components during long-term storage or transportation, effectively preventing the surface of the photosensitive drum from being contaminated or scratched, and ensuring its cleanliness and imaging performance.

[0023] To achieve the second objective mentioned above, the present invention provides a pre-installation method for a split box, comprising the aforementioned split box, and including the following steps: Cover the surface of the photosensitive drum with release paper; The developing cartridge is installed on the drum frame of the drum assembly, so that the positioning post and the positioning groove are positioned and engaged, and the first fixed engagement part is connected to the second fixed engagement part.

[0024] As can be seen from the above solution, by pre-assembling the developing unit and the drum unit together, the developing cartridge and drum frame can be pre-installed and fixed in advance. On the one hand, this facilitates the transportation and warehousing management of the whole machine and reduces logistics and inventory costs. On the other hand, users do not need to assemble the developing cartridge themselves during use, which can effectively reduce the wear and tear of parts caused by repeated disassembly and assembly, and avoid the problem of reduced print quality caused by installation and positioning deviation. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the first embodiment of the split box of the present invention.

[0026] Figure 2 This is an exploded view of the first embodiment of the split box of the present invention from a first perspective.

[0027] Figure 3 This is an exploded view from a second perspective of the first embodiment of the split box of the present invention.

[0028] Figure 4 This is a top view of the first embodiment of the split box of the present invention.

[0029] Figure 5 yes Figure 4 Sectional view at point AA.

[0030] Figure 6 yes Figure 4 Sectional view at point BB.

[0031] Figure 7 yes Figure 4 Sectional view at point CC.

[0032] Figure 8 yes Figure 7 Enlarged view of point D in the middle.

[0033] Figure 9 This is a structural diagram of the second embodiment of the split box of the present invention.

[0034] Figure 10 This is an exploded view of the second embodiment of the split box of the present invention.

[0035] Figure 11 This is a cross-sectional view of the second embodiment of the split box of the present invention.

[0036] Figure 12 This is a structural diagram of the third embodiment of the split box of the present invention.

[0037] Figure 13 This is an exploded view of the third embodiment of the split box of the present invention.

[0038] Figure 14 This is a cross-sectional view of the third embodiment of the split box of the present invention.

[0039] Explanation of reference numerals in the attached figures: 1-Drum assembly, 11-Drum frame, 111-Mounting position, 112-Waste powder bin, 113-Positioning groove, 114-Arm, 115-Handle, 116-Protrusion, 1161-Inclined surface, 12-Photosensitive drum, 13-Charging roller, 1a / 1b / 1c-First fixed mating part, 1a1-Step part, 1a2-First adhesive part, 1a3-Second adhesive part, 1a4-Third adhesive part, 1c1-First inclined surface, 1c2-First stop surface; 2-Developing assembly, 21-Developing box, 211-Powder hopper, 212-Positioning post, 213-Additional powder hopper, 214-Limiting part, 22-Developing roller, 23-Powder discharge knife, 2a / 2b / 2c-Second fixed mating part, 2c1-Second inclined surface, 2c2-Second stop surface; 3-First sticker; 4-Connectors; 5a / 5b / 5c / 5d - Release paper; 6a / 6b / 6c - Second sticker.

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0041] First embodiment of the split box: See Figures 1 to 3 This embodiment provides a split box, including a detachably connected drum assembly 1 and a developing assembly 2.

[0042] The drum assembly 1 includes a drum frame 11, a photosensitive drum 12, a charging roller 13, and a cleaning blade. The drum frame 11 is provided with a mounting position 111, a waste toner bin 112, a first fixed fitting part 1a, and two positioning grooves 113. The photosensitive drum 12 is rotatably mounted at the inlet of the waste toner bin 112 and extends along the Y direction for conveying toner from the developing roller 22 to its surface for imaging. The photosensitive drum 12, the charging roller 13, and the cleaning blade are all arranged parallel to each other and adjacent to each other. The charging roller 13 is used to charge the surface of the photosensitive drum 12, and the cleaning blade is used to clean the surface of the photosensitive drum 12 of any remaining toner after transfer.

[0043] The drum assembly 1 also includes a transmission device and a drive head. The transmission device is located at one end of the drum assembly 1 in the Y direction and is used to transmit the rotational force of the photosensitive drum 12 to the various moving parts of the processing cartridge. The drive head is used to connect the driving force of the printing device to the transmission device of the processing cartridge. The drive head is located at the end of the photosensitive drum 12 and can drive the photosensitive drum 12 to rotate. The transmission device and the drive head are conventional technologies in the art and will not be described in detail here.

[0044] The developing assembly 2 includes a developing cartridge 21, a developing roller 22, and a toner discharge blade 23. The developing cartridge 21 is provided with a toner hopper 211, a developing chamber, a second fixed fitting part 2a, and two positioning posts 212. The toner hopper 211 communicates with the developing chamber and is used to store toner. A rotatable stirring rack is provided inside the toner hopper 211 to transport the toner in the toner hopper 211 to the developing chamber and to prevent the toner in the toner hopper 211 from clumping. A rotatable toner delivery roller is provided inside the developing chamber to transport the toner to the developing roller 22. The developing roller 22 and the toner discharge blade 23 are both located at the outlet of the developing chamber. The developing roller 22 can rotate around its own axis to transport the toner to the surface of the photosensitive drum 12. The toner discharge blade 23 is located on one side of the developing roller 22 and is used to control the thickness of the toner on the surface of the developing roller 22.

[0045] In this embodiment, the photosensitive drum 12 and the first fixed mating part 1a are respectively disposed on both sides of the mounting position 111 in the X direction, and two positioning grooves 113 are respectively disposed on both sides of the mounting position 111 in the Y direction, with the X, Y, and Z directions being perpendicular to each other. The positioning groove 113 extends along the Y direction and has an opening along the Z direction. The positioning groove 113 is a "U" shaped groove, and guide slopes are provided on both sides of its opening. The width of the positioning groove 113 is equal to or slightly larger than the outer diameter of the positioning post 212, so that the positioning post 212 can be accurately positioned within the positioning groove 113.

[0046] The developing roller 22 and the second fixed mating part 2a are respectively provided on both sides of the developing cartridge 21 in the X direction, and the two positioning posts 212 are respectively provided on both sides of the developing cartridge 21 in the Y direction, and the positioning posts 212 protrude from the end wall of the developing cartridge 21.

[0047] When the developing assembly 2 is assembled to the drum assembly 1, the developing roller 22 is connected to the photosensitive drum 12; the positioning post 212 is positioned and engaged with the positioning groove 113 to restrict the separation of the developing assembly 2 from the drum assembly 1 in the X direction; the second fixed engagement part 2a is detachably connected to the first fixed engagement part 1a to restrict the separation of the developing assembly 2 from the drum assembly 1 in the Z direction.

[0048] The mounting position 111 has arms 114 on both sides in the Y direction. Positioning grooves 113 are provided on the arms 114. The end of the developing cartridge 21 in the Y direction is adjacent to or abuts against the corresponding arm 114 to restrict the separation of the developing assembly 2 from the drum assembly 1 in the Y direction.

[0049] The processing cartridge 21 in this embodiment is further provided with an additional toner container 213, which protrudes upward along the Z-direction from the surface of the developing cartridge 21. Specifically, the additional toner container 213 includes a top wall and four side walls, both of which protrude from the surface of the developing cartridge 21. The top wall and the four side walls together form the additional toner container 213. The additional toner container 213 communicates with the toner container 211 to store more toner, which helps to extend the single-use life of the developing cartridge 21, reduce the number of times the developing cartridge 21 is replaced, and make it have a lifespan that is substantially equivalent to that of the drum assembly 1.

[0050] Both ends of the mounting position 111 in the X direction are provided with protrusions 116, which are located above the end of the photosensitive drum 12 and protrude towards the side where the mounting position 111 is located. An inclined surface 1161 is provided on the lower side of the protrusions 116. Limiting portions 214 are provided at both ends of the developing cartridge 21, and the limiting portions 214 can slide downward along the inclined surface 1161.

[0051] When the developing cartridge 21 is assembled onto the drum unit 11, the protrusion 116 is inserted below the protrusion 116, and the protrusion 116 can restrict the developing cartridge 21 from detaching upward in the Z direction.

[0052] Combination Figures 2 to 5 In one embodiment, the first fixed mating part 1a and the second fixed mating part 2a are fixed together by a first sticker 3.

[0053] A handle portion 115 is provided on one side of the drum frame 11 in the X direction, and a first fixing part 1a is provided on the handle portion 115. The first fixing part 1a includes a step portion 1a1 and a first adhesive portion 1a2. The first adhesive portion 1a2 is provided on the top wall of the handle portion 115, and the step portion 1a1 is provided on the side of the first adhesive portion 1a2 near the mounting position 111. In the Z direction, the step portion 1a1 is lower than the first adhesive portion 1a2, that is, a groove for accommodating the second fixing part 2a is formed in the handle portion 115.

[0054] The second fixing part 2a is a boss, which is embedded in the groove and overlaps the step part 1a1. The upper surface of the boss is basically flush with the upper surface of the first adhesive part 1a2. The first sticker 3 is respectively adhered to the boss and the first adhesive part 1a2. The first sticker 3 can be a label sticker or other stickers, which is not limited here.

[0055] Furthermore, the first fixing part 1a also includes a second adhesive part 1a3 and a third adhesive part 1a4. The second adhesive part 1a3 is disposed on the outer side wall of the handle part 115, and the third adhesive part 1a4 is disposed on the bottom wall of the handle part 115. The first sticker 3 can be simultaneously adhered to the first adhesive part 1a2, the second adhesive part 1a3, and the third adhesive part 1a4, such that one end of the first sticker 3 is located on the inner side of the drum frame 11, and the other end is located on the bottom wall of the handle part 115 of the drum frame 11. This helps to improve the adhesive strength of the first sticker 3 and prevents it from being accidentally torn apart during transportation or transfer.

[0056] Combination Figure 2 , Figure 3 and Figure 6 In another embodiment, the first fixed mating part 1b and the second fixed mating part 2b are locked together by the connector 4.

[0057] The first fixed fitting part 1b is a first mounting hole. The number of first mounting holes is set to one or more. In this embodiment, two are used as an example. The two first mounting holes are respectively set at both ends of the handle part 115 in the Y direction, and the first mounting holes penetrate the handle part 115 in the X direction.

[0058] The second fixing part 2b is a second mounting hole. The number of second mounting holes is equal to the number of first mounting holes, and the second mounting holes are arranged in a one-to-one correspondence with the first mounting holes and are connected. The connector 4 passes through the first mounting hole and connects to the second mounting hole. The connector 4 is preferably a screw.

[0059] To ensure that the connector 4 is securely connected to the second mounting hole and that the connector 4 does not penetrate the developing cartridge 21, this embodiment provides two protruding posts on one side of the developing cartridge 21, and the second mounting hole is opened inside the protruding posts.

[0060] Of course, the first mounting hole can also be set in other positions of the drum frame 11 except for the handle 115, and the second mounting hole is set in accordance with the first mounting hole, which will not be described in detail here.

[0061] Combination Figure 2 , Figure 3 , Figure 7 and Figure 8 In another embodiment, the first fixed fitting part 1c is engaged with the second fixed fitting part 2c.

[0062] The first fixed fitting part 1c is a first protrusion. There is one or more first protrusions. In this embodiment, two are used as an example. The two first protrusions are respectively provided on both ends of the handle part 115 in the Y direction, and the first protrusions protrude in the direction of the mounting position 111. The first protrusion is provided with a first inclined surface 1c1 and a first stop surface 1c2. The first inclined surface 1c1 is located above the first stop surface 1c2 in the Z direction. The first inclined surface 1c1 extends downward in the Z direction, and the first stop surface 1c2 is parallel to the XY plane.

[0063] The second fixed fitting part 2c is a second protrusion, and the number of second protrusions is equal to the number of first protrusions. The second protrusions correspond one-to-one with the first protrusions. The second protrusions extend from the side wall of the developing cartridge 21 and are provided with a second inclined surface 2c1 and a second stop surface 2c2. The second stop surface 2c2 is positioned above the second inclined surface 2c1 in the Z-direction. The second inclined surface 2c1 is fitted with the first inclined surface 1c1 to facilitate relative sliding between them during assembly. The second stop surface 2c2 is parallel to the first stop surface 1c2, and when assembled, the second stop surface 2c2 abuts against the first stop surface 1c2 in the Z-direction.

[0064] The above three types of fixed mating parts can be set individually on the same split box, or they can be combined in pairs and set on the same split box, or all three can be set on the same split box at the same time. There are no restrictions here.

[0065] exist Figure 5 , Figure 6 and Figure 7 In the figure, the powder hopper 211, the auxiliary powder hopper 213 and the waste powder hopper 112 are all chamber structures. The figure is only a simplified illustration and does not represent that the interior of each hopper is a solid structure.

[0066] Combination Figures 1 to 3 and combined Figure 5 The split box in this embodiment is also provided with a separating paper 5a and a second sticker 6a.

[0067] In this embodiment, the release paper 5a is a single sheet, with its center positioned between the photosensitive drum 12 and the developing roller 22. Both ends of the release paper 5a extend to the two sides of the drum assembly 1 in the Z direction. The first end of the second sticker 6a is attached between the first end of the release paper 5a and the upper surface of the drum assembly 1. The center of the second sticker 6a covers the outside of the waste toner container 112 of the drum frame 11, and the second end of the second sticker 6a is attached between the second end of the release paper 5a and the lower surface of the drum assembly 1.

[0068] Second embodiment of the split box: See Figures 9 to 11Based on the first embodiment of the split-type cartridge described above, in this embodiment, the release paper 5b is a single sheet. One end of the release paper 5b extends counterclockwise from the lower part of the drum assembly 1 around the outer periphery of the photosensitive drum 12, passes through the developing roller 22, and is inserted between the photosensitive drum 12 and the charging roller 13. The other end of the release paper 5b extends clockwise from the lower part of the drum assembly 1 around the outer side of the waste toner compartment 112 to the upper part of the drum assembly 1. The second sticker 6b is pasted between the end of the release paper 5b and the upper surface of the drum assembly 1.

[0069] Third embodiment of the split box: See Figures 11 to 13 Based on the first embodiment of the split box described above, the isolation paper 5c in this embodiment is set to two sheets.

[0070] The first end of the first isolation paper 5c is disposed between the photosensitive drum 12 and the charging roller 13, and the second end of the first isolation paper 5c extends to the upper side of the drum assembly 1 in the Z direction.

[0071] The middle part of the second release paper 5d is located between the photosensitive drum 12 and the developing roller 22, and the two ends of the second release paper 5d extend to both sides of the drum assembly 1 in the Z direction.

[0072] The first end of the second sticker 6c is pasted between the same end of the two release papers 5c and 5d and the upper surface of the drum assembly 1. The middle part of the second sticker 6c covers the outside of the waste powder container 112. The second end of the second sticker 6c is pasted between the second release paper 5d and the lower surface of the drum assembly 1.

[0073] Example of pre-installation method for split box: The pre-installation method for the split box provided in this embodiment, including the split box of any of the above embodiments, further includes the following steps: A release liner is placed over the surface of the photosensitive drum. When only one release liner is used, its center covers the outer surface of the photosensitive drum, and its two ends extend to both sides of the drum assembly in the Z-direction. When two release liners are used, the first end of the first release liner is positioned between the photosensitive drum and the charging roller, and its second end extends to the upper side of the drum assembly in the Z-direction. The center of the second release liner is positioned over the outer surface of the photosensitive drum, and its two ends extend to both sides of the drum assembly in the Z-direction.

[0074] The developing cartridge is installed on the drum frame of the drum assembly, so that the positioning post and the positioning groove are positioned and engaged, and the first fixed engagement part is connected to the second fixed engagement part.

[0075] The first fixed mating part and the second fixed mating part are fixed by a first sticker, the first fixed mating part and the second fixed mating part are locked together by a connector, and / or the first fixed mating part and the second fixed mating part are snapped together.

[0076] The specific connection method between the first fixed mating part and the second fixed mating part is the same as that in any of the above embodiments, and will not be repeated here.

[0077] In summary, this invention achieves rapid alignment and installation of the developing assembly and drum unit by precisely matching the positioning posts and positioning grooves, effectively ensuring the preset distance between the developing roller and the photosensitive drum, thus guaranteeing print quality from the source. Simultaneously, the detachable connection between the second and first fixing parts effectively limits their movement in the Z-axis, preventing accidental loosening during transportation or use. The simple connection structure between the drum assembly and the developing assembly significantly reduces production and disassembly difficulties, facilitating operation for users and manufacturers, while also providing high assembly stability, which is beneficial for maintaining stable imaging results over the long term.

[0078] Finally, it should be emphasized that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A split-type cartridge, comprising a detachably connected drum assembly and a developing assembly, characterized in that: The drum assembly includes a drum frame and a photosensitive drum. The drum frame is provided with a mounting position, a first fixed fitting part and two positioning grooves. The photosensitive drum and the first fixed fitting part are respectively located on both sides of the mounting position in the X direction. The two positioning grooves are respectively located on both sides of the mounting position in the Y direction and extend along the Y direction. The developing assembly includes a developing cartridge and a developing roller. The developing cartridge is provided with a second fixed fitting part and two positioning posts. The developing roller and the second fixed fitting part are respectively located on both sides of the developing cartridge in the X direction. The two positioning posts are respectively located on both sides of the developing cartridge in the Y direction. The developing roller is connected to the photosensitive drum. The positioning posts are positioned and fitted with the positioning groove to restrict the separation of the developing assembly from the drum assembly in the X direction. The second fixed fitting part is detachably connected to the first fixed fitting part to restrict the separation of the developing assembly from the drum assembly in the Z direction. The X, Y, and Z directions are perpendicular to each other.

2. The split box according to claim 1, characterized in that: Arms are provided on both sides of the mounting position in the Y direction, and positioning grooves are provided on the arms. The end of the developing cartridge in the Y direction is adjacent to or abuts against the corresponding arm to restrict the separation of the developing assembly from the drum assembly in the Y direction. The developing cartridge is provided with a toner cartridge and an auxiliary toner cartridge. The developing roller is located at the outlet of the toner cartridge. The auxiliary toner cartridge protrudes from the surface of the developing cartridge and is in communication with the toner cartridge.

3. The split box according to claim 1, characterized in that: The first fixed fitting part and the second fixed fitting part are fixed together by a first sticker.

4. The split box according to claim 3, characterized in that: The first fixed mating part includes a stepped part and a first adhesive part. The stepped part is disposed on the side of the first adhesive part near the mounting position and in the Z direction, the stepped part is lower than the first adhesive part. The second fixing part is a boss, which overlaps the step part, and the first sticker is respectively attached to the boss and the first adhesive part.

5. The split box according to claim 1, characterized in that: The first fixed mating part and the second fixed mating part are locked together by a connector.

6. The split box according to claim 5, characterized in that: The first fixing part is a first mounting hole, the second fixing part is a second mounting hole, and the connector passes through the first mounting hole and is connected in the second mounting hole.

7. The split box according to claim 1, characterized in that: The first fixed fitting part and the second fixed fitting part are engaged.

8. The split box according to claim 7, characterized in that: The first fixed mating part is a first protrusion. The first protrusion protrudes in the direction of the mounting position. The first protrusion is provided with a first inclined surface and a first stop surface. The first inclined surface is located above the first stop surface. The first inclined surface extends downward along the Z direction. The first stop surface is parallel to the XY plane. The second fixed fitting part is a second protrusion. The second protrusion is provided with a second inclined surface and a second stop surface. The second inclined surface is fitted with the first inclined surface, and the second stop surface is parallel to and abuts against the first stop surface.

9. The split box according to any one of claims 1 to 8, characterized in that: The split box is also provided with a release paper and a second sticker; The release paper is a single sheet, with its center positioned between the photosensitive drum and the developing roller. Both ends of the release paper extend to the two sides of the drum assembly in the Z direction. The first end of the second sticker is attached between the release paper and the upper surface of the drum assembly, and the second end of the second sticker is attached between the release paper and the lower surface of the drum assembly. Alternatively, the release paper can be in the form of two sheets. One end of the first release paper is positioned between the photosensitive drum and the charging roller, and the other end of the first release paper extends to one side of the drum assembly in the Z direction. The middle of the second release paper is positioned between the photosensitive drum and the developing roller, and both ends of the second release paper extend to both sides of the drum assembly in the Z direction. The first end of the second sticker is attached between the same end of the two release papers and the upper surface of the drum assembly, and the second end of the second sticker is attached between the second release paper and the lower surface of the drum assembly.

10. A pre-installation method for a split-type box, comprising the split-type box as described in claim 9, characterized in that, Includes the following steps: The release paper is placed over the surface of the photosensitive drum; The developing cartridge is installed on the drum frame of the drum assembly, such that the positioning post is positioned and engaged with the positioning groove, and the first fixing engagement part is connected with the second fixing engagement part.

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