Processing box

Abstract

The utility model provides a processing box, the processing box comprises a developing assembly and a photosensitive assembly which are detachably connected, the developing assembly comprises a developing roller, a powder feeding roller and a pre-positioning piece, the developing roller is used for bearing a developing agent, and the powder feeding roller is used for transferring the developing agent to the developing roller; the developing roller and the powder feeding roller are arranged in parallel in the first direction, and the pre-positioning piece is arranged on the developing roller and the powder feeding roller in a sleeving mode to limit the positions of the developing roller and the powder feeding roller. The photosensitive assembly comprises a photosensitive drum extending in the first direction, and the photosensitive drum is used for adsorbing the developing agent on the developing roller to form an image. According to the embodiment of the utility model, the pre-positioning piece is arranged, so that the positions of the developing roller and the powder feeding roller can be limited in the mounting process of the processing box, the difficulty of aligning the developing roller, the powder feeding roller and the photosensitive drum with other parts for assembly is reduced, and the assembly operation of the processing box is simplified.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrostatic imaging, in particular to a processing box. Background Art

[0002] A processing box is a container that can be installed in an electronic imaging device and uses electrostatic imaging technology to form an image on an imaging medium. Due to technical and quality limitations, the components of the processing box are relatively complicated. The processing box mainly includes components such as a developing roller, a powder feeding roller, and a photosensitive drum. The assembly accuracy between the above components affects the imaging quality on the imaging medium, such as the assembly accuracy between the developing roller and the powder feeding roller, and the assembly accuracy between the developing roller and the photosensitive drum. In order to achieve assembly accuracy, the relevant technology needs to meet various positioning requirements, making the assembly process between the above components and between the above components and other parts more difficult and complicated to operate. Utility Model Content

[0003] In view of this, the utility model provides a processing box to solve the technical problem of how to reduce the difficulty of assembling the processing box.

[0004] The technical solution provided by the embodiment of the utility model is implemented as follows:

[0005] A processing box comprises: a developing assembly, including a developing roller, a powder feeding roller and a pre-positioning member, wherein the developing roller is used to carry a developer, and the powder feeding roller is used to transfer the developer to the developing roller; the developing roller and the powder feeding roller are arranged in parallel along a first direction, and the pre-positioning member is sleeved on the developing roller and the powder feeding roller to limit the positions of the developing roller and the powder feeding roller; a photosensitive assembly, including a photosensitive drum extending along the first direction, and the photosensitive drum is used to absorb the developer on the developing roller to form an image; wherein the photosensitive assembly is detachably connected to the developing assembly.

[0006] In some embodiments, the pre-positioning member defines a through hole extending along the first direction, and the developing roller and the powder feeding roller pass through the corresponding through holes respectively.

[0007] In some embodiments, the photosensitive drum is provided with a helical gear, and the helical gear is meshed with a gear provided on the developing roller.

[0008] In some embodiments, the processing box also includes: a powder silo shell, the powder silo shell has a cavity for accommodating the powder feeding roller and the developing roller, and the powder feeding roller is arranged between the powder silo shell and the developing roller; a first end cover, the first end cover is connected to the first end of the powder silo shell in the first direction, and is sleeved on the developing roller and the photosensitive drum; wherein the pre-positioning member is arranged between the first end cover and the powder silo shell.

[0009] In some embodiments, the developing roller has a first shaft portion passing through the pre-positioning member and the first end cover, and a first radial gap between the first shaft portion and the pre-positioning member is greater than a second radial gap between the first shaft portion and the first end cover.

[0010] In some embodiments, the processing box also includes: a conductive bracket, which is arranged near the second end of the powder bin shell in the first direction; the conductive bracket is sleeved on the second shaft portion of the developing roller to limit the position of the second shaft portion, and the second shaft portion and the first shaft portion are the opposite ends of the developing roller in the first direction.

[0011] In some embodiments, the processing box also includes: a powder outlet knife, which is installed on the powder bin shell; wherein the conductive end of the conductive bracket is electrically contacted with the conductive end of the second shaft portion of the developing roller and the conductive end of the powder outlet knife respectively.

[0012] In some embodiments, the powder feeding roller has a third shaft portion located at the end in the first direction; the third shaft portion passes through the pre-positioning member and the first end cover, or the third shaft portion passes through the pre-positioning member and is located inside the first end cover.

[0013] In some embodiments, in the first direction, the powder feeding roller further includes a conductive end of the powder feeding roller arranged opposite to the third shaft portion; the powder bin shell is provided with a fixing hole for the conductive end of the powder feeding roller to pass through, so as to limit the position of the conductive end of the powder feeding roller.

[0014] In some embodiments, the processing box also includes: a second end cover, the second end cover is connected to the second end of the powder bin shell in the first direction, and is sleeved on the developing roller and the photosensitive drum; wherein the first end cover and / or the second end cover are provided with a positioning hole, a conductive sleeve is arranged in the positioning hole to sleeve at least one of the developing roller and the powder feeding roller, and an oil structure groove is arranged on the inner wall of the sleeve along the circumferential direction.

[0015] The utility model embodiment provides a processing box, which includes a detachably connected developing assembly and a photosensitive assembly, the developing assembly includes a developing roller, a powder feeding roller and a pre-positioning member, the developing roller is used to carry a developer, and the powder feeding roller is used to transfer the developer to the developing roller; the developing roller and the powder feeding roller are both arranged in parallel along a first direction, and the pre-positioning member is sleeved on the developing roller and the powder feeding roller to limit the positions of the developing roller and the powder feeding roller; the photosensitive assembly includes a photosensitive drum extending along the first direction, and the photosensitive drum is used to absorb the developer on the developing roller to develop the electrostatic latent image. The utility model embodiment provides a pre-positioning member, so that during the installation process of the processing box, the positions of the developing roller and the powder feeding roller are limited by a simple structure, and the modular assembly of the developing assembly and the photosensitive assembly is not affected, and the difficulty of aligning the developing roller, the powder feeding roller and the photosensitive drum, and the developing roller, the powder feeding roller and the photosensitive drum with other components for assembly is reduced, which is conducive to simplifying the assembly operation of the processing box. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of a processing box provided by an embodiment of the utility model;

[0017] Figure 2 A three-dimensional assembly diagram of a processing box provided by an embodiment of the utility model;

[0018] Figure 3 A three-dimensional assembly diagram of a first end cover and a developing assembly provided in an embodiment of the utility model;

[0019] Figure 4 for Figure 2 Enlarged view of part A in the middle;

[0020] Figure 5 A three-dimensional assembly diagram of the second end cover and the developing assembly provided by an embodiment of the utility model;

[0021] Figure 6 A partial structural schematic diagram of a second end of a developing assembly exposed in a first direction provided by an embodiment of the utility model.

[0022] Description of reference numerals:

[0023] 1. developing assembly; 11. developing roller; 111. first shaft; 112. second shaft; 12. powder feeding roller; 121. third shaft; 122. fourth shaft; 1221. conductive end of powder feeding roller; 13. pre-positioning member; 131. through hole; 14. powder bin shell; 141. cavity; 142. first end; 143. second end; 144. fixing hole; 15. conductive bracket; 16. powder knife; 2. photosensitive assembly; 21. photosensitive drum; 211. bevel gear; 3. first end cover; 4. second end cover; 101. positioning hole; 102. bushing. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] The various specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction, for example, different embodiments and technical solutions can be formed by combining different specific technical features. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features in the utility model will not be described separately.

[0026] In the following description, the terms "first, second, etc." are only used to distinguish different objects, and do not mean that the objects have the same or related points. It should be understood that the directions "above", "below", "outside" and "inside" are all directions in normal use, and the directions "left" and "right" refer to the left and right directions shown in the corresponding schematic diagrams, which may or may not be the left and right directions in normal use.

[0027] It should be noted that the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. "Multiple" means greater than or equal to two.

[0028] Reference Figure 1 The present invention provides a processing box that can be detachably installed in an electronic imaging device, including but not limited to a laser printer, a copier, a fax machine, a scanner, and a multifunction machine. It should be noted that the application scenario type of the present invention does not limit the structure of the processing box of the present invention.

[0029] Reference Figure 2 The processing box includes a developing component 1 and a photosensitive component 2. The developing component 1 is detachably connected to the photosensitive component 2. A user or maintenance personnel can replace and repair each component in the developing component 1 and / or the photosensitive component 2 separately, and / or replace and repair each component to maximize energy saving and extend the overall service life of the processing box.

[0030] The developing assembly 1 includes a developing roller 11, a powder feeding roller 12 and a pre-positioning member 13, and the photosensitive assembly 2 includes a photosensitive drum 21. The developing roller 11, the powder feeding roller 12 and the photosensitive drum 21 all extend along a first direction and can rotate around the first direction, that is, the developing roller 11, the powder feeding roller 12 and the photosensitive drum 21 are all rotating bodies. The first direction can be understood as the length direction of the processing box 1, and the length direction is the maximum size direction of the processing box in the three-dimensional coordinate system, such as Figure 2 As shown, the first direction is represented as N1 direction. It can be understood that the first direction represents a collection of parallel line extension directions rather than a line extension direction. The powder feeding roller 12 is used to transfer the developer to the developing roller 11, the developing roller 11 is used to carry the developer, and the photosensitive drum 21 is used to receive the laser beam to form an electrostatic latent image. After the developing component 1 and the photosensitive component 2 are assembled into a whole, the photosensitive drum 21 can absorb the developer on the developing roller 11 to develop the electrostatic latent image.

[0031] Reference Figure 3 , wherein the photosensitive component 2 is omitted, and the pre-positioning member 13 is sleeved on the developing roller 11 and the powder feeding roller 12 to limit the positions of the developing roller 11 and the powder feeding roller 12. It can be understood that the developing roller 11 and the powder feeding roller 12 are both columnar members extending along the first direction N1, and the developing roller 11 and the powder feeding roller 12 both pass through the pre-positioning member 13, thereby forming a state in which the pre-positioning member 13 is sleeved on the outside of the developing roller 11 and the outside of the powder feeding roller 12 at the same time, then, the developing roller 11 and the powder feeding roller 12 are constrained by the pre-positioning member 13 to limit the relative position. During the assembly process, by sleeved the pre-positioning member 13 on the developing roller 11 and the powder feeding roller 12, the relative position between the developing roller 11 and the powder feeding roller 12 is limited, and the freedom of movement between the developing roller 11 and the powder feeding roller 12 is reduced, thereby reducing the difficulty of alignment required for assembly during the subsequent assembly of the photosensitive drum 21 and / or other components (such as the first end cover 3 and / or the second end cover 4).

[0032] The embodiment of the utility model provides a processing box, which includes a detachably connected developing assembly 1 and a photosensitive assembly 2, the developing assembly 1 includes a developing roller 11, a powder feeding roller 12 and a pre-positioning member 13, the photosensitive assembly 2 includes a photosensitive drum 21, the developing roller 11, the powder feeding roller 12 and the photosensitive drum 21 all extend along a first direction N1 and rotate around the first direction N1, the developing roller 11 is used to carry a developer, the powder feeding roller 12 is used to transfer the developer to the developing roller 11, and the photosensitive drum 21 is used to absorb the developer on the developing roller 11 to develop an electrostatic latent image. Among them, the pre-positioning member 13 is sleeved on the developing roller 11 and the powder feeding roller 12 to limit the positions of the developing roller 11 and the powder feeding roller 12. It can be simply understood that before the developer assembly 1 and the photosensitive assembly 2 are assembled, and / or before the developer assembly 1 and the photosensitive assembly 2 are assembled with other components (such as the first end cover 3 and / or the second end cover 4), the powder feeding roller 12 and the developing roller 11 have been installed in a "pre-positioned" manner, which will not affect the modular assembly of the developer assembly 1 and the photosensitive assembly 2, and thus will not increase the difficulty of assembling the developing roller 11, the powder feeding roller 12 and the photosensitive drum 21. In the post-assembly section where the developer assembly 1 and the photosensitive assembly 2 are assembled into a whole, the alignment of the powder feeding roller 12, the developing roller 11 and the photosensitive drum 21 can be completed by adjusting the position of the photosensitive drum 21 accordingly. The structure set in this way is relatively simple, and reduces the difficulty of aligning the developing roller 11, the powder feeding roller 12 and the photosensitive drum 21, and the developing roller 11, the powder feeding roller 12 and the photosensitive drum 21 with other components for assembly, which is conducive to simplifying the assembly operation of the processing box.

[0033] In some embodiments, reference Figure 4 The pre-positioning member 13 is provided with a through hole 131 extending along the first direction N1. The through hole 131 may be a closed contour surrounding the first direction N1 or an open contour. The number of the through holes 131 may be one or more and the shapes may be various, as long as the developing roller 11 and the powder feeding roller 12 can pass through and their relative positions are limited. For example, Figure 4 As shown, the pre-positioning 13 is provided with two mutually parallel through holes 131, and the developing roller 11 and the powder feeding roller 12 respectively pass through a corresponding through hole 131, that is, the shaft ends of the developing roller 11 and the powder feeding roller 12 are as shown in FIG. Figure 3 The pre-positioning member 13 is shown protruding. The embodiment of the utility model defines the positions of the powder feeding roller 12 and the developing roller 11 by opening a through hole 131 on the pre-positioning member 13. It can be seen that the structure of the pre-positioning member 13 is relatively simple, which is conducive to simplifying the processing difficulty of the pre-positioning member 13 and saving costs.

[0034] In some possible embodiments, reference Figure 4There are two through holes 131, and each through hole 131 has a closed contour surrounding the first direction N1. The through holes 131 do not reserve openings or grooves in the direction surrounding the first direction N1 for leaking the developing roller 11 and / or the powder feeding roller 12, which helps to reduce the risk of leakage of the developer in the developing assembly 1 from the pre-positioning member 13.

[0035] In some embodiments, reference Figure 2 , the photosensitive drum 21 and the developing roller 11 are driven by a gear structure, which has high transmission accuracy, stable torque transmission, and a more compact structure. Specifically, the photosensitive drum 21 is provided with a helical gear 211, which meshes with a gear provided on the developing roller 11. Compared with a spur gear, the gear tooth surface of the helical gear 211 is at an oblique angle, so that the helical gear 211 gradually contacts when meshing, reducing the impact and vibration when the gears are meshing, thereby reducing the noise and vibration generated during the transmission process of the photosensitive drum 21 and the developing roller 11; it also reduces the impact and mutation between the gear tooth surfaces, making the transmission of the photosensitive drum 21 and the developing roller 11 more stable. At the same time, since the tooth surface of the helical gear 211 is at an oblique angle, the helical gear 211 can withstand greater radial force and axial force during transmission, and has a stronger load capacity; and the contact area of ​​the oblique surface is larger, which makes the gear more stable when meshing, reducing energy loss and heat generation, and improving the transmission efficiency of the photosensitive drum 21 and the developing roller 11.

[0036] In some embodiments, reference Figure 3 and Figure 4 The developing assembly 1 further includes a powder bin housing 14, and the powder bin housing 14 has a cavity 141 for accommodating a powder feeding roller 12 and a developing roller 11, and the powder feeding roller 12 is located between the powder bin housing 14 and the developing roller 11. It can be understood that the powder feeding roller 12 and the developing roller 11 are installed in the cavity 141 inside the powder bin housing 14, and the developing roller 11 is located outside the powder feeding roller 12. When installing, the powder feeding roller 12 is installed first, and then the developing roller 11 is installed, which is conducive to sealing the powder feeding roller 12 in the cavity, thereby reducing the possibility of leakage of the developer such as toner when the developing roller 11 and the powder feeding roller 12 rotate.

[0037] Reference Figure 2 and Figure 4The processing box also includes a first end cover 3, which is used to sleeve the developing roller 11 and the photosensitive drum 21 to achieve modular assembly of the developing assembly 1 and the photosensitive assembly 2; the first end cover 3 is connected to the first end 142 of the powder bin housing 14 in the first direction N1, and the pre-positioning member 13 is arranged between the first end cover 3 and the powder bin housing 14. Specifically, after the pre-positioning member 13 sleeves the powder feeding roller 12 and the developing roller 11, the first end cover 3 is connected to the first end 142 of the powder bin housing 14, and sleeves the developing roller 11 and the photosensitive drum 21. Since the developing assembly 1 is provided with the pre-positioning member 13, the powder feeding roller 12 and the developing roller 11 are pre-positioned and installed in the developing assembly 1. Therefore, during the installation process of the first end cover 3, it is not necessary to align the developing roller 11 and the photosensitive drum 21 one by one. According to the hole position on the first end cover 3, the position of the photosensitive drum 21 is adjusted accordingly, so that the developing roller 11 and the photosensitive drum 21 can be aligned and installed, and the developing assembly 1 and the photosensitive assembly 2 are assembled into a whole. Such an arrangement not only simplifies the positioning structure, but also facilitates high-precision assembly of the components in the processing box.

[0038] In some embodiments, reference Figure 1 and Figure 3 , the developing roller 11 has a first shaft portion 111 passing through the pre-positioning member 13 and the first end cover 3, and the first radial gap between the first shaft portion 111 and the pre-positioning member 13 is greater than the second radial gap between the first shaft portion 111 and the first end cover 3. It can be understood that the developing roller 11 is similar to a cylinder, so the first shaft portion 111 and the two radial gaps can be defined according to the axial and radial directions of the cylinder. Specifically, the first direction N1 is the axial direction of the developing roller 11, and the radial direction is perpendicular to the first direction N1. The first radial gap represents the radial size of the gap between the first shaft portion 111 and the pre-positioning member 13, and the second radial gap represents the radial size of the gap between the first end cover 3 and the pre-positioning member 13. It can be seen that compared with the cooperation between the first shaft portion 111 and the pre-positioning member 13, the cooperation between the first shaft portion 111 and the first end cover 3 is tighter. The first radial gap between the first shaft portion 111 and the pre-positioning member 13 is large, so that the pre-positioning member 13 can be smoothly sleeved on the developing roller 11, and the second radial gap between the first shaft portion 111 and the first end cover 3 is small, so that the accuracy of the center distance between the developing roller 11 and the photosensitive drum 21 can be maintained. This arrangement can improve the assembly accuracy between the developing roller 11 and the photosensitive drum 21 without affecting the assembly efficiency.

[0039] In some embodiments, reference Figure 2 and Figure 5In order to further explain the specific structure of the developing assembly 1, the end of the powder bin housing 14 opposite to the first end 142 in the first direction N1 is defined as the second end 143, and the part of the developing roller 11 opposite to the first shaft portion 111 in the first direction N1 is defined as the second shaft portion 112. It should be noted that for the convenience of illustration, Figure 5 The photosensitive component 2 is omitted. The developing component 1 further includes a conductive bracket 15, which is mounted on the powder bin housing 14 and is disposed near the second end 143 of the powder bin housing 14 in the first direction N1. After the developing component 1 is assembled, the conductive bracket 15 is sleeved on the second shaft portion 112 of the developing roller 11 to define the position of the second shaft portion 112 (e.g. Figure 5 As shown). It can be understood that the conductive bracket 15 is conductive, which means that the conductive end of the developing roller is on the second shaft portion 112, so the end opposite to the conductive end of the developing roller is the developing roller driving end, that is, the pre-positioning member 13 limits the developing roller driving end to a position on the powder bin housing 14 close to the first end 142 (as shown in FIG. Figure 3 The conductive bracket 15 limits the conductive end of the developing roller to a position close to the second end 143 on the powder bin housing 14 (as shown in FIG. Figure 5 As shown in FIG. 1 , both opposite ends of the developing roller 11 are limited on the powder bin housing 14 , which further improves the assembly accuracy of the developing roller 11 on the powder bin housing 14 .

[0040] In some embodiments, reference Figure 2 The processing box also includes a powder discharge knife 16, which is mounted on the powder bin housing 14. By adjusting the pressure between the powder discharge knife 16 and the developing roller 11, the thickness of the developer passing between the powder discharge knife 16 and the developing roller 11 is controlled, and the developer is charged by the rotational friction between the powder discharge knife 16 and the developing roller 11. Figure 5 The conductive end of the conductive bracket 15 is in electrical contact with the conductive end of the second shaft portion 112 of the developing roller 11 and the conductive end of the powder knife 16, so as to provide the powder knife 16 with the same voltage as the developing roller 11. The charged powder knife 16 can reduce the possibility of developer residue or accumulation on the blade of the powder knife 16, and the blade of the powder knife 16 is not easy to adhere to the developer, so as to ensure that the developer is transferred to the photosensitive drum 11; and the pressure between the powder knife 16 and the developing roller 11 does not need to be too large, and the powder knife 16 and the developer 11 with the same voltage can also be used to make the developer carry the required charge to meet the printing blackness and imaging quality. The powder knife 16 and the developing roller 11 have the same voltage, which can make the electric field distribution inside the entire developing assembly 1 more uniform, stable and coordinated, reduce the failure and damage caused by uneven or unstable electric field, and extend the service life of the processing box; and the uniform electric field is conducive to the transfer of the developer between the developing roller 11 and the photosensitive drum, so as to ensure that the developer is uniformly adsorbed on the surface of the photosensitive drum, and improve the imaging quality and consistency.

[0041] In some embodiments, reference Figure 3 The powder feeding roller 12 has a third shaft portion 121 located at the end of the first direction N1, and the third shaft portion 121 passes through the pre-positioning member 13 and the first end cover 3, or the third shaft portion 121 passes through the pre-positioning member 13 and is located inside the first end cover 3. In the embodiment where the third shaft portion 121 passes through the pre-positioning member 13 and the first end cover 3, the position of the third shaft portion 121 of the powder feeding roller 12 is defined by the pre-positioning member 13 and the first end cover 3, and the assembly accuracy of the third shaft portion 121 is higher, which is conducive to maintaining the assembly accuracy of the powder feeding roller 12 on the powder bin housing 14. Since the center distance accuracy between the powder feeding roller 12 and the developing roller 11 has little influence on the imaging quality, the center distance accuracy between the powder feeding roller 12 and the developing roller 11 can be lower than the center distance accuracy between the developing roller 11 and the photosensitive drum. Therefore, the third shaft portion 121 can only pass through the pre-positioning member 13 and be located on the inner side of the first end cover 3. Under this embodiment, there is no need to reserve a hole on the first end cover 3 to limit the third shaft portion 121, which is conducive to reducing the processing difficulty of the first end cover 3. The first end cover 3 does not need to be additionally provided with the powder feeding roller 12, which is conducive to reducing the assembly difficulty of the first end cover 3.

[0042] In some embodiments, Figure 6 Schematic diagram of the structure of a part of the developing assembly 1. Specifically, for the convenience of illustration, Figure 6 The developer roller is omitted. Figure 3 and Figure 6 , defining the powder feeding roller 12 and the third shaft portion 121 (such as Figure 3 ) is a fourth shaft portion 122 (such as Figure 6 ), the free end of the fourth shaft portion 122 is the conductive end 1221 of the powder feeding roller (such as Figure 6 ), correspondingly, the free end of the third shaft portion 121 is the driving end of the powder feeding roller (such as Figure 3 ). Reference Figure 6 The powder bin housing 14 is provided with a fixing hole 144 for the conductive end 1221 of the powder feeding roller to pass through, so as to limit the position of the conductive end 1221 of the powder feeding roller. The charged powder feeding roller 12 can enhance the powder adsorption capacity, improve the developer transfer efficiency, and reduce the fluttering and diffusion of the developer during the developer transfer process, so as to ensure that the developer is more stable and uniform during the developer transfer process. The conductive end 1221 of the powder feeding roller is directly fixed to the powder bin housing 14, which is conducive to ensuring the assembly accuracy of the powder feeding roller 12 on the powder bin housing 14, so as to ensure that the powder feeding roller 12 is stably charged.

[0043] In some embodiments, reference Figure 2The processing box also includes a second end cover 4, which is connected to the second end 143 of the powder bin housing 14 in the first direction N1 and is sleeved on the developing roller 11 and the photosensitive drum 21. In other words, the second end cover 4 is arranged opposite to the first end cover 3. The first end cover 3 and / or the second end cover 4 have a positioning hole 101, and a sleeve 102 is arranged in the positioning hole 101 to sleeve at least one of the developing roller 11 and the powder feeding roller 12, so as to reduce the wear of the developing roller 11 and / or the powder feeding roller 12 during long-term rotation. Specifically, in the embodiment shown in the schematic diagram of the present application, refer to Figure 3 The powder feeding roller 12 is only provided with a pre-positioning member 13 and is located on the inner side of the first end cover 3. Therefore, only one sleeve 102 is provided in the first end cover 3 for sleeve-mounting the developing roller 11. Figure 5 Two sleeves 102 are provided in the second end cover 4, and the developing roller 11 and the powder feeding roller 12 pass through one sleeve 102 respectively. In some possible embodiments, the inner wall of the sleeve 102 is provided with an oil groove along the circumference to supply lubricating oil, so as to further reduce the wear of the developing roller 11 and / or the powder feeding roller 12 during long-term rotation.

[0044] In some possible implementations, reference Figure 5 The shaft sleeve 102 is conductive, and at least the shaft sleeve 102 in the second end cover 4 is conductive, so as to conduct electricity on the circumferential surface of the developing roller 11 and / or the powder feeding roller 12. Compared with the implementation method of electrical contact with the end surface of the developing roller 11 and / or the powder feeding roller 12, a conductive shaft sleeve 102 is provided in the embodiment of the utility model to electrically contact with the circumferential surface of the developing roller 11 and / or the powder feeding roller 12, thereby increasing the electrical contact area with the developing roller 11 and / or the powder feeding roller 12 and reducing the voltage imbalance caused by vibration or shaking of the developing roller 11 and / or the powder feeding roller 12.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A processing box, characterized in that: include: A developing assembly, comprising a developing roller, a powder feeding roller and a pre-positioning member, wherein the developing roller is used to carry the developer, and the powder feeding roller is used to transfer the developer to the developing roller; The developing roller and the powder feeding roller are arranged in parallel along a first direction, and the pre-positioning member is sleeved on the developing roller and the powder feeding roller to limit the positions of the developing roller and the powder feeding roller; The photosensitive component comprises a photosensitive drum extending along a first direction, wherein the photosensitive drum is used for absorbing the developer on the developing roller to form an image; wherein the photosensitive component is detachably connected to the developing component.

2. The process cartridge according to claim 1, wherein: The pre-positioning member is provided with a through hole extending along the first direction, and the developing roller and the powder feeding roller pass through the corresponding through holes respectively.

3. The process cartridge according to claim 1, wherein: The photosensitive drum is provided with a helical gear, and the helical gear is meshed with a gear provided on the developing roller.

4. The process cartridge according to claim 1, wherein: The processing box also includes: A powder silo housing, wherein the powder silo housing has a cavity for accommodating the powder feeding roller and the developing roller, and the powder feeding roller is arranged between the powder silo housing and the developing roller; A first end cover, the first end cover is connected to a first end of the powder bin housing in the first direction and is sleeved on the developing roller and the photosensitive drum; Wherein, the pre-positioning member is arranged between the first end cover and the powder bin shell.

5. The process cartridge according to claim 4, wherein: The developing roller has a first shaft portion passing through the pre-positioning member and the first end cover, and a first radial gap between the first shaft portion and the pre-positioning member is greater than a second radial gap between the first shaft portion and the first end cover.

6. The process cartridge according to claim 5, wherein: The processing box also includes: A conductive bracket is arranged near the second end of the powder bin shell in the first direction; the conductive bracket is sleeved on the second shaft portion of the developing roller to limit the position of the second shaft portion, and the second shaft portion and the first shaft portion are the opposite ends of the developing roller in the first direction.

7. The process cartridge according to claim 6, wherein: The processing box also includes: A powder discharging knife, the powder discharging knife being mounted on the powder bin housing; Wherein, the conductive end of the conductive bracket is in electrical contact with the conductive end of the second shaft portion of the developing roller and the conductive end of the powder discharge knife respectively.

8. The process cartridge according to claim 4, wherein: The powder feeding roller has a third shaft portion located at the end portion in the first direction; the third shaft portion passes through the pre-positioning member and the first end cover, or the third shaft portion passes through the pre-positioning member and is located inside the first end cover.

9. The process cartridge according to claim 8, wherein: In the first direction, the powder feeding roller further comprises a conductive end of the powder feeding roller arranged opposite to the third shaft portion; the powder bin shell is provided with a fixing hole for the conductive end of the powder feeding roller to pass through, so as to limit the position of the conductive end of the powder feeding roller.

10. The process cartridge according to claim 4, wherein: The processing box also includes: A second end cover, the second end cover is connected to a second end of the powder bin housing in the first direction and is sleeved on the developing roller and the photosensitive drum; The first end cover and / or the second end cover is provided with a positioning hole, a conductive sleeve is arranged in the positioning hole to sleeve at least one of the developing roller and the powder feeding roller, and an oil structure groove is arranged on the inner wall of the sleeve along the circumferential direction.

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