Developing roller limiting structure and developing box

Abstract

The utility model discloses a developing roller limiting structure and a developing cartridge, the developing roller limiting structure comprises a developing roller, a mounting seat and a sleeving piece arranged at the end of the developing roller in a sleeving manner, a limiting groove is formed in the mounting seat, and the sleeving piece is arranged to be capable of being mounted into the limiting groove in the first direction; and in other directions, the sleeving piece cannot be mounted in the limiting groove and cannot be separated from the limiting groove. According to the technical scheme, the positioning problem in the mounting process of the developing roller is effectively solved, and the assembly time is remarkably shortened. Close fit of the sleeving piece and the limiting groove reduces clearance between parts, it is ensured that the developing roller keeps a stable posture during working, printing defects caused by uneven carbon powder conveying are avoided, and the structure simplifies the operation process and enhances the reliability of equipment operation. According to the developing box adopting the developing roller limiting structure, the developing roller is stable and reliable to install, the production efficiency is high, and the production cost is low.

Description

Technical Field

[0001] This application relates to the field of laser printer technology, and in particular to a developing roller limiting structure and a developing cartridge. Background Technology

[0002] In laser printers, toner, as a consumable, is stored in the toner cartridge. A developing roller is located at the toner cartridge's delivery port. This developing roller is in close contact with the drum unit and is electrically charged during operation, ensuring even toner adsorption by the drum unit. Currently, the developing roller is installed with one end fixed to a roughly perforated mounting point integrally formed with the housing, and the other end secured to a cylindrical structure on a detachable side cover. This installation method is simple, convenient, and suitable for most cartridge installations. However, this method has several drawbacks. During installation, the developing roller end must be aligned with the mounting point before the side cover mounting structure can be installed, a cumbersome process that reduces installation efficiency. Furthermore, to ensure successful installation of the developing roller end onto the mounting point or structure, the hole diameter of the mounting point or structure is often larger than the developing roller end diameter. This causes the developing roller to wobble relative to the housing, potentially affecting printer stability and image quality. Therefore, existing technology urgently needs improvement to address these issues. Utility Model Content

[0003] The purpose of this application is to provide a developing roller limiting structure, which has the advantages of convenient installation, accurate positioning and prevention of developing roller shaking.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] On one hand, a developing roller limiting structure is provided, including a developing roller, a mounting base, and a sleeve sleeved on the end of the developing roller. The mounting base is provided with a limiting groove, and the sleeve is configured to be able to be installed into the limiting groove in a first direction, while in other directions the sleeve can neither be installed into the limiting groove nor disengaged from the limiting groove.

[0006] Optionally, the limiting groove is a circular hole opened on the plane of the mounting base perpendicular to the axis of the developing roller, and the first direction is the axial direction of the circular hole.

[0007] Optionally, the limiting groove is provided with an directional groove in the radial direction of the circular hole, and the sleeve is provided with an directional plate corresponding to the directional groove. When the directional groove and the directional plate are aligned, the sleeve can pass through the circular hole and the directional groove and be installed into the limiting groove.

[0008] Optionally, a baffle is provided on the sleeve at an axial distance from the directional plate. The size of the baffle is larger than the size of the directional groove. A first slot is formed between the directional plate and the baffle. When the sleeve is inserted into the limiting groove, the side wall of the mounting base with the limiting groove is engaged in the first slot.

[0009] Optionally, the limiting groove is a circular hole opened on the plane of the mounting base perpendicular to the axis of the developing roller, and the first direction is the diameter direction of the circular hole.

[0010] Optionally, the limiting groove has a notch in the radial direction of the circular hole, the size of the notch being smaller than the diameter of the circular hole. The socket has a main body portion with a width matching the circular hole and a flat portion with a width corresponding to the size of the notch. When the flat portion corresponds to the notch, the socket can pass through the notch and be inserted into the limiting groove. When the main body portion corresponds to the notch, it cannot pass through the notch and be removed from the limiting groove.

[0011] Optionally, the socket has a second slot in the circumferential direction, and the limiting groove has a limiting boss in the circumferential direction. When the socket is inserted into the limiting groove, the second slot and the limiting boss engage to restrict the circumferential movement of the socket.

[0012] Optionally, the second slot has a first slot wall and a second slot wall on each side, and the outline dimension of the first slot wall is larger than the outline dimension of the second slot wall.

[0013] Optionally, the device may also include a housing, wherein the mounting base is detachably mounted on the housing, or the mounting base and the housing are integrally formed.

[0014] Optionally, the socket is provided with a control handle, which can be moved by moving the control handle.

[0015] On the other hand, a developing cartridge is provided, including the developing roller limiting structure as described above.

[0016] The beneficial effects of this application are as follows: by limiting the installation angle through the cooperation of the sleeve and the limiting groove, the developing roller can only be installed at a specific angle and cannot be removed, which solves the problems of complicated installation and developing roller shaking in the prior art. It has the advantages of convenient installation, accurate positioning and high stability. The developing box with the above-mentioned developing roller limiting structure has stable and reliable developing roller installation, high production efficiency and low production cost. Attached Figure Description

[0017] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the developing roller installation state structure according to an embodiment of this application;

[0019] Figure 2 This is an exploded view of the developing roller mounting structure described in the embodiments of this application;

[0020] Figure 3 for Figure 2 A magnified view of a specific area is shown in section I.

[0021] Figure 4 This is another perspective view of the exploded view of the developing roller mounting structure described in the embodiments of this application;

[0022] Figure 5 for Figure 4 A magnified view of a section in section II;

[0023] Figure 6 This is a schematic diagram of the structure of the developing roller in the embodiment of this application, in the state of being installed but not locked.

[0024] Figure 7 This is a schematic diagram of the developing roller being installed and locked in accordance with the embodiments of this application.

[0025] Figure 8 This is a three-dimensional structural diagram of a socket according to an embodiment of this application;

[0026] Figure 9 This is a three-dimensional structural diagram of a socket according to an embodiment of this application from another perspective;

[0027] Figure 10 This is a schematic diagram of another socket structure according to an embodiment of this application;

[0028] Figure 11 This is a three-dimensional structural diagram of another socket described in an embodiment of this application.

[0029] In the picture:

[0030] 100. Developing roller; 200. Mounting base; 210. Limiting groove; 220. Orientation groove; 230. Notch; 240. Limiting boss; 300. Socket; 310. Orientation plate; 320. Baffle; 330. First slot; 340. Main body; 350. Flat part; 360. Second slot; 361. First groove wall; 362. Second groove wall; 370. Control handle; 400. Equipment housing. Detailed Implementation

[0031] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0037] In existing technologies, the developing roller of a laser printer's processing cartridge is typically installed with one end fixed and the other end detachable. This structure requires the operator to precisely align the end of the developing roller with the fixing hole before assembling the side cover, a cumbersome and time-consuming process. Because the diameter of the fixing hole needs to be larger than the diameter of the developing roller end for easy installation, the developing roller is prone to radial misalignment during actual operation, leading to unstable toner delivery and affecting print quality.

[0038] Based on the above, such as Figure 1-11 As shown, this application provides a developing roller limiting structure, including a developing roller 100, a mounting base 200, and a sleeve 300 sleeved on the end of the developing roller 100. The mounting base 200 is provided with a limiting groove 210. The sleeve 300 is configured to be able to be installed into the limiting groove 210 in a first direction, and the sleeve 300 cannot be installed into or removed from the limiting groove 210 in other directions.

[0039] Specifically, after the operator rotates the socket 300 to a preset angle, it can be pushed axially into the limiting groove 210 to complete the assembly. When the developing roller 100 is in the working position, the socket 300 and the limiting groove 210 form a circumferential constraint, preventing the developing roller 100 from swinging radially. If an attempt is made to disassemble at an angle other than the set angle, the outer contour of the socket 300 will interfere with the inner wall of the limiting groove 210, forming a physical lock.

[0040] Compared with existing technologies, this solution automatically achieves positioning and calibration during assembly through the directional engagement of the socket 300 and the limiting groove 210. Traditional installation methods require visual inspection for alignment, while this solution simplifies the complex two-dimensional positioning into a single rotation angle adjustment by guiding the operation through physical structure.

[0041] Through the above technical solution, this application effectively solves the positioning problem during the installation of the developing roller 100, significantly shortening the assembly time. The tight fit between the socket 300 and the limiting groove 210 reduces the clearance between components, ensuring that the developing roller 100 maintains a stable posture during operation and avoiding printing defects caused by uneven toner delivery. This structure simplifies the operation process while enhancing the reliability of equipment operation.

[0042] As a preferred technical solution in an embodiment of this application, refer to Figure 2-5As shown, the limiting groove 210 is a circular hole opened on the plane of the mounting base 200 perpendicular to the axis of the developing roller 100, and the first direction is the axial direction of the circular hole.

[0043] The circular hole refers to a through-hole structure on the mounting base 200 that is perpendicular to the axis of the developing roller 100. Its shape is circular, and it can be achieved through machining or injection molding. The inner diameter of the circular hole matches the outer diameter of the sleeve 300. The sleeve 300 is inserted from the end of the developing roller 100, and its cylindrical body is pushed linearly into the limiting groove 210 along the axial direction of the circular hole. After the sleeve 300 is fully inserted, the outer wall of the sleeve 300 forms a clearance fit with the inner wall of the circular hole, at which point the developing roller 100 is confined within the limiting groove 210.

[0044] Furthermore, this application provides specific solutions for implementing the aforementioned directional loading, referring to... Figure 4 , 5 As shown in Figures 8 and 9, the limiting groove 210 is provided with an directional groove 220 in the radial direction of the circular hole. The sleeve 300 is provided with a directional plate 310 corresponding to the directional groove 220. When the directional groove 220 and the directional plate 310 are aligned, the sleeve 300 can pass through the circular hole and the directional groove 220 and be installed into the limiting groove 210. The sleeve 300 can be withdrawn from the limiting groove 210 in the first direction without changing the relative orientation (rotating around the axis).

[0045] The directional groove 220 refers to a groove structure extending radially along the circular hole. Specifically, it can be achieved by creating a strip-shaped groove on the edge of the circular hole, providing a circumferential positioning guide path for the socket 300. The directional plate 310 refers to a protruding structure connected to the socket 300, used to form a complementary fit with the directional groove 220, ensuring that the socket 300 can only be installed at a specific angle.

[0046] When the socket 300 needs to be inserted into the limiting groove 210, the guide plate 310 must be fully aligned with the guide groove 220 of the mounting base 200. At this time, the axis of the socket 300 coincides with the axis of the circular hole, and the guide plate 310 can slide into the limiting groove 210 along the extension direction of the guide groove 220. (Refer to...) Figure 6 , 7 As shown, after installation, the control sleeve 300 is rotated so that the guide plate 310 is misaligned with the guide groove 220. At this time, the guide plate 310 on the sleeve 300 abuts against the wall of the mounting base 200, preventing it from exiting along the axial direction.

[0047] In the above structure, the rotation after insertion restricts the retraction of the sleeve 300 along the axial direction, but it can still continue to move along the axial direction, thereby contacting the end of the developing roller 100 and forming friction, resulting in a gap between the developing roller 100 and the mounting base 200. Based on the above, the embodiments of this application provide a further solution, referring to... Figure 8 , 9 As shown, a baffle 320 is provided on the sleeve 300 at an axial distance from the directional plate 310. The size of the baffle 320 is larger than the size of the directional groove 220. A first slot 330 is formed between the directional plate 310 and the baffle 320. When the sleeve 300 is inserted into the limiting groove 210, the side wall of the mounting base 200 formed by the limiting groove 210 is engaged in the first slot 330.

[0048] When the socket 300 is inserted into the limiting groove 210, the directional plate 310 needs to be aligned with the directional groove 220 to allow the socket 300 to pass through the limiting groove 210. When the socket 300 reaches the predetermined installation position, the baffle 320 cannot continue to move inward because its size is larger than the directional groove 220. At this time, the side wall of the limiting groove 210 is restricted in the first slot 330 between the directional plate 310 and the baffle 320, thereby achieving double-sided fixation in the axial direction.

[0049] This application embodiment also provides another structure and assembly method for the limiting groove 210 and the socket 300, see reference. Figure 2 , 3 As shown in Figures 10 and 11, the limiting groove 210 is a circular hole opened on the plane of the mounting base 200 perpendicular to the axis of the developing roller 100. In this embodiment, the first direction is the diameter direction of the circular hole.

[0050] It should be noted that since there can be an infinite number of radial directions for a circular hole, the embodiment of this application uses the direction of the horizontal direction facing the mounting base 200 as an example. In other optional embodiments of this application, other diameter directions can also be used, as long as they are convenient for installation and disassembly operations and make reasonable use of space.

[0051] Installing along the diameter means that the sleeve 300 passes through the circular hole in a radial moving path. Since both ends of the developing roller 100 need to be installed in the mounting base 200, the length of the developing roller 100 will be greater than the distance between the two mounting bases 200. Therefore, at least one mounting base 200 needs to be able to achieve radial installation of the developing roller 100, so as to ensure that the developing roller 100 can be installed smoothly.

[0052] During installation, the sleeve 300 at the end of the developing roller 100 only needs to be inserted into the circular hole along a single radial path, without the need for circumferential alignment. After the sleeve 300 is fully inserted into the limiting groove 210, its outer diameter and the contact surface with the inner wall of the circular hole form a circumferential constraint, preventing the developing roller 100 from shaking during rotation.

[0053] Preferred, refer to Figure 3 As shown, the limiting groove 210 has a notch 230 in the radial direction of the circular hole. The size of the notch 230 is smaller than the diameter of the circular hole. The socket 300 has a main body portion 340 with a width that matches the circular hole, and a flat portion 350 with a width corresponding to the size of the notch 230. When the flat portion 350 corresponds to the notch 230, the socket 300 can pass through the notch 230 and be inserted into the limiting groove 210. When the main body portion 340 corresponds to the notch 230, it cannot pass through the notch 230 and be removed from the limiting groove 210. Only by rotating the socket 300 so that the flat portion 350 corresponds to the notch 230 can the socket 300 be removed from the limiting groove 210.

[0054] In this embodiment, notch 230 refers to a radially extending recessed channel on the side of the circular hole of the mounting base 200, used to restrict the installation of the socket 300 to a specific angle. The main body 340 refers to the conventional structural area of ​​the outer circumference of the socket 300, which can be implemented using a cylindrical structure, with its radial dimension matching the inner diameter of the circular hole. The flat portion 350 refers to a partially reduced structural area of ​​the outer circumference of the socket 300, with its radial dimension matching the width of notch 230, allowing the socket 300 to pass through notch 230 and be inserted into the circular hole when the flat portion 350 and notch 230 are aligned, thus assembling and fixing the developing roller 100. (Refer to...) Figure 6 , 7 As shown, after the socket 300 is inserted into the limiting groove, the main body 340 can be aligned with the notch 230 by rotation. Since the size of the main body 340 is larger than the size of the notch 230, it cannot be removed from the notch 230 at this time.

[0055] Meanwhile, the axial positioning structure of this structure has been designed in this embodiment, referring to... Figure 10 , 11As shown, the socket 300 has a second groove 360 ​​formed in the circumferential direction, and the limiting groove 210 has a limiting boss 240 formed in the circumferential direction. When the socket 300 is inserted into the limiting groove 210, the second groove 360 ​​and the limiting boss 240 engage to restrict the circumferential movement of the socket 300. This design prevents the socket 300 from moving relative to the mounting base 200 in the axial direction, ensuring assembly stability.

[0056] Preferred, refer to Figure 11 As shown, in this embodiment of the application, the second slot 360 has a first slot wall 361 and a second slot wall 362 on both sides, and the outline dimension of the first slot wall 361 is larger than the outline dimension of the second slot wall 362. This arrangement can be used to identify the installation direction of the socket 300, and avoid the socket 300 affecting the installation when it is fitted onto the developing roller 100.

[0057] In this application, the mounting base 200 can be configured in various ways. For example, in one optional embodiment of this application, it further includes a device housing 400, and the mounting base 200 is detachably mounted on the device housing 400. Alternatively, in other embodiments, the mounting base 200 and the device housing 400 are an integral structure.

[0058] Furthermore, refer to Figure 8-11 As shown, the socket 300 is provided with a control handle 370, and the socket 300 can be moved by moving the control handle 370.

[0059] The control handle 370 provides an operating position for the operating socket 300, and its lever arm reduces the difficulty of rotating the control socket 300.

[0060] Optionally, this application embodiment also provides a developing cartridge, which installs the developing roller through the developing roller limiting structure described above. By setting a sleeve to limit the installation of the developing roller, the assembly efficiency can be improved and the production cost reduced while ensuring structural stability.

[0061] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A developing roller limiting structure, characterized in that, The device includes a developing roller (100), a mounting base (200), and a sleeve (300) sleeved on the end of the developing roller (100). The mounting base (200) is provided with a limiting groove (210). The sleeve (300) is configured to be able to be installed into the limiting groove (210) in a first direction, and the sleeve (300) cannot be installed into or removed from the limiting groove (210) in other directions.

2. The developing roller limiting structure according to claim 1, characterized in that, The limiting groove (210) is a circular hole opened on the plane of the mounting base (200) perpendicular to the axis of the developing roller (100), and the first direction is the axial direction of the circular hole.

3. The developing roller limiting structure according to claim 2, characterized in that, The limiting groove (210) has an orientation groove (220) in the radial direction of the circular hole. The sleeve (300) has an orientation plate (310) corresponding to the orientation groove (220). When the orientation groove (220) and the orientation plate (310) are aligned, the sleeve (300) can pass through the circular hole and the orientation groove (220) and be installed into the limiting groove (210).

4. The developing roller limiting structure according to claim 3, characterized in that, A baffle (320) is provided on the sleeve (300) at an axial distance from the directional plate (310). The size of the baffle (320) is larger than the size of the directional groove (220). A first slot (330) is formed between the directional plate (310) and the baffle (320). When the sleeve (300) is inserted into the limiting groove (210), the side wall of the mounting base (200) with the limiting groove (210) is engaged in the first slot (330).

5. The developing roller limiting structure according to claim 1, characterized in that, The limiting groove (210) is a circular hole opened on the plane of the mounting base (200) perpendicular to the axis of the developing roller (100), and the first direction is the diameter direction of the circular hole.

6. The developing roller limiting structure according to claim 3, characterized in that, The limiting groove (210) has a notch (230) in the radial direction of the circular hole. The size of the notch (230) is smaller than the diameter of the circular hole. The sleeve (300) has a main body (340) with a width that matches the circular hole, and a flat part (350) with a width corresponding to the size of the notch (230). When the flat part (350) corresponds to the notch (230), the sleeve (300) can pass through the notch (230) and be inserted into the limiting groove (210). When the main body (340) corresponds to the notch (230), it cannot pass through the notch (230) and be dislodged from the limiting groove (210).

7. The developing roller limiting structure according to claim 6, characterized in that, The socket (300) has a second slot (360) formed in the circumferential direction, and the limiting groove (210) has a limiting boss (240) formed in the circumferential direction. When the socket (300) is inserted into the limiting groove (210), the second slot (360) and the limiting boss (240) engage and cooperate to restrict the circumferential movement of the socket (300).

8. The developing roller limiting structure according to claim 7, characterized in that, The second slot (360) has a first slot wall (361) and a second slot wall (362) on both sides, and the outline size of the first slot wall (361) is larger than the outline size of the second slot wall (362).

9. The developing roller limiting structure according to claim 1, characterized in that, It also includes a device housing (400), the mounting base (200) being detachably mounted on the device housing (400), or the mounting base (200) and the device housing (400) being an integral structure.

10. The developing roller limiting structure according to claim 1, characterized in that, The socket (300) is provided with a control handle (370), and the socket (300) can be moved by moving the control handle (370).

11. A developing cartridge, characterized in that, The developing roller limiting structure includes any one of claims 1-10.

Images