Developing unit and processing box

Abstract

The embodiment of the utility model provides a developing unit and a processing box. The developing unit comprises a shell, a developing roller and a forced pushing assembly, the developing roller is rotatably arranged on the shell, at least partial area of the forced-pushed assembly is arranged on the developing roller, the forced-pushed assembly is provided with a forced-pushed surface, the forced-pushed surface is separated from the shell, and the forced-pushed surface is used for abutting against and being matched with a forced-pushing piece of a photosensitive unit. And under the pushing of the forced pushing piece, the developing roller is in contact with a photosensitive drum of the photosensitive unit. The developing unit provided by the embodiment of the utility model is low in maintenance cost.

Description

Technical Field

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

[0002] The printer's processing cartridge includes a developing unit and a photosensitive unit. In related technologies, the photosensitive unit abuts against the developing unit so that the developing roller and the photosensitive drum maintain contact, thereby facilitating the developing roller and the photosensitive drum to perform the developing operation.

[0003] However, in related technologies, the developing unit of the processing cartridge directly contacts the photosensitive unit through the housing. The contact point between the developing unit and the photosensitive unit, being a load-bearing component, is prone to breakage under the contact of the photosensitive unit. When breakage occurs, the entire housing of the developing unit needs to be replaced, resulting in high maintenance costs. Utility Model Content

[0004] In view of this, the main objective of the embodiments of this application is to provide a developing unit and processing cartridge that can reduce maintenance costs.

[0005] To achieve the above objectives, the technical solution of this application embodiment is implemented as follows:

[0006] The first aspect of this application provides a developing unit, including a housing, a developing roller, and a forced push assembly.

[0007] The developing roller is rotatably mounted on the housing;

[0008] At least a portion of the forced push assembly is disposed on the developing roller. The forced push assembly has a forced push surface, which is separately disposed from the housing. The forced push surface is used to abut against the forced push member of the photosensitive unit so that the developing roller contacts the photosensitive drum of the photosensitive unit under the pushing of the forced push member.

[0009] In one embodiment, the developing unit includes a powder feeding roller rotatably mounted on the housing. The forced pushing assembly includes a fixing bracket having a first mounting hole and a second mounting hole. The end of the powder feeding roller passes through the first mounting hole, and the end of the developing roller passes through the second mounting hole.

[0010] In one embodiment, the forced push assembly further includes a forced push member having the forced push surface, the forced push member having a third mounting hole, and the forced push assembly is provided at at least one end of the powder feeding roller along the axial direction, the forced push member being sleeved on the powder feeding roller through the third mounting hole.

[0011] In one embodiment, the fixed bracket and the forced pusher are spaced apart along the axial direction of the powder feeding roller; or,

[0012] The forced pusher and the fixed bracket are integrally formed.

[0013] In one embodiment, the fixed bracket has the forced pushing surface.

[0014] In one embodiment, the hardness of the forced-push component is greater than the hardness of the housing; and / or,

[0015] The forced pushing surface is a curved surface that protrudes toward one side of the forced pushing member.

[0016] In one embodiment, the forced pusher includes a connecting section and an abutting section, the abutting section having the forced push surface, the abutting section being located on the side of the connecting section close to the forced pusher along a first direction and being connected to the connecting section;

[0017] At the junction of the connecting segment and the abutting segment, the dimension of the abutting segment along the second direction is greater than the dimension of the connecting segment along the second direction, and the second direction is perpendicular to the first direction.

[0018] In one embodiment, the third mounting hole is located at the junction of the connecting section and the abutting section.

[0019] A second aspect of this application provides a developing unit, which includes a housing, a developing roller, and a forced pusher. The developing roller is rotatably disposed on the housing, and the forced pusher has a forced push surface that is separately disposed from the housing. The forced push surface is used to abut against and cooperate with the forced pusher of the photosensitive unit so that the developing roller contacts the photosensitive drum of the photosensitive unit under the pushing of the forced pusher.

[0020] A third aspect of this application provides a processing cartridge, which includes a photosensitive unit and any of the above-described developing units. The photosensitive unit includes a pusher and a photosensitive drum. The pusher abuts against the pusher surface to make the developing roller contact the photosensitive drum.

[0021] This application provides a developing unit and a processing cartridge. The developing unit includes a housing, a developing roller, and a forced push assembly. At least a portion of the forced push assembly is disposed on the developing roller. The forced push assembly has a forced push surface for abutting against a push member of the photosensitive unit, so that the developing roller contacts the photosensitive drum of the photosensitive unit under the pushing force of the push member. In other words, by abutting against the push member of the photosensitive unit, the developing roller and the photosensitive drum can maintain contact, facilitating the developing roller and the photosensitive drum during the developing process. Simultaneously, the forced push surface is separate from the housing; that is, the forced push surface and the housing are not a single integral structure and can be separated. Therefore, when the forced push surface of the forced push assembly is damaged or broken under the contact of the push member, only the forced push surface needs to be repaired and replaced, without needing to repair and replace the entire housing, thus significantly reducing the maintenance cost of the developing unit. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a processing box according to an embodiment of this application;

[0023] Figure 2 for Figure 1 Schematic diagram of the developing unit;

[0024] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0025] Figure 4 for Figure 1 Schematic diagram of the photosensitive unit;

[0026] Figure 5 for Figure 2 Exploded view of the developing unit;

[0027] Figure 6 for Figure 5 A schematic diagram of the structure of the forced pusher component;

[0028] Figure 7 for Figure 5 Schematic diagram of the fixed bracket in the middle;

[0029] Figure 8 for Figure 1 A cross-sectional view of the central processing box along its length;

[0030] Figure 9 for Figure 8 A magnified view of a section at point B in the middle;

[0031] Figure 10 for Figure 1 A cross-sectional view of the central processing box along the lateral direction;

[0032] Figure 11This is an exploded view of a processing box according to another embodiment of this application;

[0033] Figure 12 for Figure 11 A schematic diagram of the structure of the fixed bracket.

[0034] Explanation of reference numerals in the attached figures

[0035] 10. Developing unit; 11. Housing; 12. Developing roller; 13. Forced push assembly; 13a. Forced push surface; 131. Fixing bracket; 131a. First mounting hole; 131b. Second mounting hole; 132. Forced pusher; 132a. Third mounting hole; 1321. Connecting section; 1322. Abutting section; 14. Powder feeding roller; 20. Photosensitive unit; 21. Forced pusher; 22. Photosensitive drum. Detailed Implementation

[0036] In this application, the orientation or positional relationship of "first direction" and "second direction" is based on the appendix. Figure 6 The orientation or positional relationship shown is for illustrative purposes only and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0037] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0038] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0039] One embodiment of this application provides a developing unit 10, please refer to... Figure 2 , Figure 5 and Figure 8 The developing unit 10 includes a housing 11, a developing roller 12, and a forced push assembly 13.

[0040] The developing roller 12 is rotatably mounted on the housing 11.

[0041] Please see Figure 4 and Figure 10At least a portion of the forced push assembly 13 is disposed on the developing roller 12. The forced push assembly 13 has a forced push surface 13a, which is separately disposed from the housing 11. The forced push surface 13a is used to abut against the forced push member 21 of the photosensitive unit 20 so that the developing roller 12 contacts the photosensitive drum 22 of the photosensitive unit 20 under the pushing of the forced push member 21.

[0042] Another embodiment of this application provides a processing box; please refer to [link / reference]. Figure 1 The processing box includes a photosensitive unit 20 and a developing unit 10 as described in any embodiment of this application. The photosensitive unit 20 includes a pusher 21 and a photosensitive drum 22. The pusher 21 abuts against the pusher surface 13a so that the developing roller 12 contacts the photosensitive drum 22.

[0043] Specifically, the processing box is used in conjunction with an imaging device, which can be any type of imaging device such as a printer, copier, or fax machine.

[0044] The housing 11 is the housing structure of the developing unit 10, and the developing roller 12 can rotate on the housing 11.

[0045] The forced push assembly 13 is a structure on the developing unit 10 that cooperates with the forced push member 21 of the photosensitive unit 20. The forced push assembly 13 can be an integral structure or a separate structure.

[0046] When the forced push assembly 13 is an integral structure, the forced push assembly 13 is set on the developing roller 12, and the two can be directly connected or indirectly connected through other structures.

[0047] When the forced push assembly 13 is a split structure, depending on the actual situation, the entire forced push assembly 13 can be connected to the developing roller 12, or only a part of the part can be directly connected to the developing roller 12, while the other part is set on other structures.

[0048] However, regardless of the structural form of the forced push assembly 13, it must satisfy the following: when the forced push member 21 of the photosensitive unit 20 abuts against the forced push surface 13a, the forced push assembly 13 can keep the developing roller 12 and the photosensitive drum 22 in contact.

[0049] When the force applied by the pusher 21 of the photosensitive unit 20 is applied to the forced push surface 13a, the forced push assembly 13 can transmit the force to the developing roller 12, thereby making the developing roller 12 contact the photosensitive drum 22.

[0050] The forced pushing surface 13a is separately disposed from the housing 11, that is, the forced pushing surface 13a of the forced pushing assembly 13 and the housing 11 are not an integral structure, and the two can be separated from each other. Depending on the actual situation, the forced pushing surface 13a and the housing 11 may not be in contact, or they may be in contact and separable.

[0051] It should be noted that, for the forced push assembly 13, at least its forced push surface 13a is separated from the housing 11. Depending on the actual situation, the forced push assembly 13 may be entirely separated from the housing 11. When the forced push assembly 13 is a split structure, a portion of the forced push assembly 13 may be connected to the housing 11, while the area of ​​the forced push surface 13a may be separated from the housing 11.

[0052] Since the forced pushing surface 13a of the forced pushing assembly 13 is separated from the housing 11, the material type of the forced pushing surface 13a can be easily adjusted. In other words, different material types can be used between the forced pushing surface 13a and the housing 11 depending on the actual situation.

[0053] For example, the hardness of the forced push component 13 is greater than that of the housing 11. In other words, the forced push component 13 is made of a material with greater hardness, which makes the material of the forced push component 13 more wear-resistant and pressure-resistant than that of the housing 11, thus reducing the risk of the forced push component 13 breaking.

[0054] Of course, in some embodiments, the same material type may also be used between the forced push component 13 and the housing 11.

[0055] It should be noted that the specific shape of the forced push surface 13a is not limited.

[0056] For example, please see Figure 3 and Figure 6 The forced pushing surface 13a is a curved surface that protrudes towards the forced pushing member 21, such as an arc surface. This facilitates the transmission of force between the forced pushing member 21 and the forced pushing assembly 13, while also reducing the overall size of the forced pushing assembly 13.

[0057] Of course, in some embodiments, the forced pushing surface 13a may also be a plane or other form.

[0058] In related technologies, when the developing unit is installed on the photosensitive unit, the pressing wall of the developing unit is pressed by the pressing component of the photosensitive unit. The pressing wall is a wall structure on the housing, and as a stress-bearing component, it is prone to breakage, which means that the entire housing needs to be repaired or replaced.

[0059] In the developing unit 10 of this application embodiment, at least a portion of the forced pushing assembly 13 is disposed on the developing roller 12. The forced pushing assembly 13 has a forced pushing surface 13a, which is used to abut against the forced pushing member 21 of the photosensitive unit 20, so that the developing roller 12 contacts the photosensitive drum 22 of the photosensitive unit 20 under the pushing of the forced pushing member 21. That is, by the abutting and engaging of the forced pushing assembly 13 with the forced pushing member 21 of the photosensitive unit 20, the developing roller 12 and the photosensitive drum 22 can be kept in contact, which facilitates the developing roller 12 and the photosensitive drum 22 to perform developing operations. At the same time, the forced pushing surface 13a is separately disposed from the housing 11, that is, the forced pushing surface 13a and the housing 11 are not an integral structure, and the two can be separated from each other. Therefore, when the forced pushing surface 13a of the forced pushing assembly 13 is damaged or broken by the abutment of the forced pushing member 21, only the forced pushing surface 13a can be repaired and replaced, without the need to repair and replace the entire housing 11, thus greatly reducing the maintenance cost of the developing unit 10.

[0060] Another embodiment of this application provides a developing unit 10, which includes a housing 11, a developing roller 12, and a forced pusher 132. The developing roller 12 is rotatably disposed on the housing 11. The forced pusher 132 has a forced push surface 13a, which is separately disposed from the housing 11. The forced push surface 13a is used to abut against the forced pusher 21 of the photosensitive unit 20 so that the developing roller 12 contacts the photosensitive drum 22 of the photosensitive unit 20 under the pushing of the forced pusher 21.

[0061] It should be noted that, in this embodiment, the relative positional relationship between the forced pusher 132 and the developing roller 12 is not limited. They can be interconnected (including direct connection or indirect connection through other structures). Depending on the actual situation, they may not be connected, as long as they can cooperate to ensure that the developing roller 12 contacts the photosensitive drum 22 when the forced pusher 21 abuts against the forced pusher surface 13a.

[0062] In one embodiment, please refer to Figure 5 , Figure 7 , Figure 8 and Figure 9 The developing unit 10 includes a powder feeding roller 14, which is rotatably mounted on the housing 11. The forced push assembly 13 includes a fixed bracket 131, which has a first mounting hole 131a and a second mounting hole 131b. The end of the powder feeding roller 14 passes through the first mounting hole 131a, and the end of the developing roller 12 passes through the second mounting hole 131b. Thus, when the forced push member 21 abuts against the forced push assembly 13, the fixed bracket 131 can transmit the force to the developing roller 12, thereby bringing the developing roller 12 into contact with the photosensitive drum 22.

[0063] Specifically, the first mounting hole 131a is a mounting hole on the fixed bracket 131 for the end of the powder feeding roller 14 to pass through, and the second mounting hole 131b is a mounting hole on the fixed bracket 131 for the end of the developing roller 12 to pass through.

[0064] By setting the fixed bracket 131, the positional stability between the powder feeding roller 14 and the developing roller 12 can be improved. At the same time, when the pushing member 21 abuts against the pushing assembly 13, the force applied by the pushing member 21 can be transmitted to the developing roller 12 through the fixed bracket 131, so that the developing roller 12 and the photosensitive drum 22 maintain contact.

[0065] It should be noted that there are no restrictions on the specific settings for the forced push surface 13a.

[0066] Depending on the actual situation, the forced push surface 13a can be mounted on the fixed bracket 131. Please refer to [link / reference]. Figure 11 and Figure 12 For example, the fixed bracket 131 has a forced pushing surface 13a. Thus, the forced pushing member 21 can directly abut and press against the fixed bracket 131 to maintain the contact state between the developing roller 12 and the photosensitive drum 22 through the fixed bracket 131.

[0067] In other embodiments, the forced pushing surface 13a may also be disposed on other structures.

[0068] For example, please see Figure 5 and Figure 6 The forced push assembly 13 also includes a forced push member 132 having a forced push surface 13a. The forced push member 132 has a third mounting hole 132a. The forced push assembly 13 is provided at least one end of the powder feeding roller 14 along the axial direction, and the forced push member 132 is sleeved on the powder feeding roller 14 through the third mounting hole 132a. Thus, when the forced push member 21 abuts against the forced push surface 13a of the forced push member 132, the forced push member 132 can transmit the abutment force to the developing roller 12 through the powder feeding roller 14 and the fixed bracket 131 to maintain the contact state between the developing roller 12 and the photosensitive drum 22.

[0069] Specifically, the end of the powder feeding roller 14 passes through both the third mounting hole 132a and the first mounting hole 131a.

[0070] Depending on the actual situation, the forced push component 13 may be provided at only one end of the powder feeding roller 14 along the axial direction, or the forced push component 13 may be provided at both opposite ends of the powder feeding roller 14 along the axial direction.

[0071] The specific arrangement between the forced pusher 132 and the fixed bracket 131 can be set according to the actual situation.

[0072] For example, please see Figure 9The fixed bracket 131 and the forced pusher 132 are spaced apart along the axial direction of the powder feeding roller 14. That is, the fixed bracket 131 and the forced pusher 132 are separated along the axial direction of the powder feeding roller 14. Therefore, when the forced pusher 132 needs to be maintained, the fixed bracket 131 does not need to be replaced, which can reduce maintenance costs.

[0073] The relative positions of the fixed bracket 131 and the forced pusher 132 are not limited. For example, the fixed bracket 131 may be located outside the forced pusher 132. Or, the fixed bracket 131 may be located inside the forced pusher 132.

[0074] For example, the forced pusher 132 and the fixed bracket 131 are integrally formed. That is to say, the forced pusher 132 and the fixed bracket 131 can adopt an integral structure, thereby improving the stability between the forced pusher 132 and the fixed bracket 131 and facilitating the transfer of the abutment force to the developing roller 12.

[0075] In one embodiment, please refer to Figure 6 The forced push member 132 includes a connecting section 1321 and an abutting section 1322. The abutting section 1322 has a forced push surface 13a. The abutting section 1322 is located on the side of the connecting section 1321 that is close to the forced push member 21 along the first direction and is connected to the connecting section 1321.

[0076] At the junction of the connecting section 1321 and the abutting section 1322, the dimension of the abutting section 1322 along the second direction is larger than the dimension of the connecting section 1321 along the second direction, and the second direction is perpendicular to the first direction. This reduces the overall size of the forced pusher 132, which helps to reduce costs.

[0077] Specifically, the contact section 1322 is the area on the forced pusher 132 that is used to contact the forced pusher 21, and the connecting section 1321 is the area on the forced pusher 132 that is used to connect with the powder feeding roller 14.

[0078] The abutment section 1322 is located on the side of the connecting section 1321 close to the pusher 21, and the two are set in the first direction.

[0079] In the second direction (perpendicular to the first direction), the abutment section 1322 is larger, which means that by reducing the size of the connecting section 1321 in the second direction, the overall size of the forced pusher 132 can be reduced.

[0080] For example, the cross-sectional shape of the connecting segment 1321 is rectangular, and the cross-sectional shape of the abutting segment 1322 is arc-shaped.

[0081] It should be noted that the specific location of the third mounting hole 132a can be determined according to the actual situation.

[0082] For example, please see Figure 6 The third mounting hole 132a is located at the junction of the connecting section 1321 and the abutting section 1322. As a result, the extension length of the connecting section 1321 along the first direction can be further reduced, which can further facilitate the miniaturization of the forced push member 132.

[0083] For example, the entire area of ​​the third mounting hole 132a is located in the connecting section 1321.

[0084] In the description of this application, the references to terms such as "in one embodiment," "in some embodiments," "in a specific embodiment," or "exemplary," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine the different embodiments or examples described in this application, as well as the features of the different embodiments or examples.

[0085] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A developing unit, characterized in that, include: case; A developing roller, which is rotatably mounted on the housing; A forced push assembly, at least a portion of which is disposed on the developing roller, the forced push assembly having a forced push surface that is separately disposed from the housing, the forced push surface being used to abut against and cooperate with the forced push member of the photosensitive unit, so that the developing roller contacts the photosensitive drum of the photosensitive unit under the pushing of the forced push member.

2. The developing unit according to claim 1, characterized in that, The developing unit includes a powder feeding roller rotatably mounted on the housing. The forced pushing assembly includes a fixed bracket having a first mounting hole and a second mounting hole. The end of the powder feeding roller passes through the first mounting hole, and the end of the developing roller passes through the second mounting hole.

3. The developing unit according to claim 2, characterized in that, The forced push assembly further includes a forced push member having the forced push surface, the forced push member having a third mounting hole, and the forced push assembly is provided at at least one end of the powder feeding roller along the axial direction, the forced push member being sleeved on the powder feeding roller through the third mounting hole.

4. The developing unit according to claim 3, characterized in that, The fixed bracket and the forced pusher are spaced apart along the axial direction of the powder feeding roller; or, The forced pusher and the fixed bracket are integrally formed.

5. The developing unit according to claim 2, characterized in that, The fixed bracket has the forced pushing surface.

6. The developing unit according to any one of claims 1-5, characterized in that, The hardness of the forced-push component is greater than the hardness of the housing; and / or, The forced pushing surface is a curved surface that protrudes toward one side of the forced pushing member.

7. The developing unit according to claim 3 or 4, characterized in that, The forced pusher includes a connecting section and an abutting section. The abutting section has the forced push surface. The abutting section is located on the side of the connecting section close to the forced pusher along a first direction and is connected to the connecting section. At the junction of the connecting segment and the abutting segment, the dimension of the abutting segment along the second direction is greater than the dimension of the connecting segment along the second direction, and the second direction is perpendicular to the first direction.

8. The developing unit according to claim 7, characterized in that, The third mounting hole is located at the junction of the connecting section and the abutting section.

9. A developing unit, characterized in that, include: case; A developing roller, which is rotatably mounted on the housing; A forced pusher has a forced push surface, which is separately disposed from the housing. The forced push surface is used to abut against the forced pusher of the photosensitive unit so that the developing roller contacts the photosensitive drum of the photosensitive unit under the pushing of the forced pusher.

10. A processing box, characterized in that, The processing cartridge includes a photosensitive unit and a developing unit as described in any one of claims 1-9. The photosensitive unit includes a pusher and a photosensitive drum. The pusher abuts against the pusher surface to make the developing roller contact the photosensitive drum.

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