Processing box driving head assembly and processing box

Abstract

The processing box driving head assembly comprises a driving head, a driving gear, a positioning support, a reset spring, a limiting support and a driving block, the reset spring, the limiting support and the driving block are arranged in an inner cavity of the driving gear, and a rod body of the driving head sequentially penetrates through the positioning support, the limiting support and the driving block; the second end of the driving head is provided with a buckling part; a driving head supporting part is arranged at the bottom of an inner cavity of the driving gear, a through hole extending along the axis of the driving gear is formed in the driving head supporting part, at least one buckling rib is arranged at the bottom of the through hole, and the buckling part can penetrate through the buckling rib in an extruding mode, is exposed out of the driving gear and is buckled with the buckling rib. And the buckling rib can limit the buckling part from returning into the inner cavity of the driving gear. According to the utility model, the driving head, the driving gear, the limiting bracket, the positioning bracket and the driving block are assembled into an integral assembly through the buckling part on the driving head and the buckling rib on the driving gear, so that the delivery quantity of materials is reduced, the assembly steps are simplified, and the assembly efficiency of finished products is improved.

Description

Technical Field

[0001] This utility model belongs to the field of electronic imaging and photography technology, specifically relating to a processing box and a processing box drive head assembly for an image forming device. Background Technology

[0002] Laser printers, copiers, and other image forming apparatuses typically have an image processing unit and a developing unit. The developing unit uses toner or other developing agents to develop the electrostatic latent image formed on the image processing unit, thus creating a visible image on a medium such as paper. The developing unit includes a processing cartridge, which is a detachable box that fits into the main unit of the image forming apparatus. The processing cartridge has multiple rotating components, such as a developing roller, a stirring rack, a magnetic roller, and a photosensitive drum. These rotating components require rotational driving force from the image forming apparatus to rotate. The processing cartridge usually has a drive head. After the processing cartridge is installed, the drive head cooperates with the rotational drive components on the image forming equipment, receiving the rotational driving force from the image forming apparatus and transmitting it to the gears of each rotating component, thereby driving each rotating component to rotate around its respective axis.

[0003] In the existing processing box structure, the drive head is assembled with a drive positioning bracket, a limit bracket, a drive block, a return spring, and a drive gear. When the drive head rotates, it drives the drive gear to rotate as well, and the rotational driving force is transmitted through the meshing of the drive gear and other gears. During processing box assembly, the developing roller, developing roller gear, gear end bracket, and conductive end bracket are assembled onto the powder hopper body. Then, the drive head, positioning bracket, limit bracket, drive block, return spring, and drive gear are sequentially assembled onto the gear end bracket. Finally, the positioning end cover is installed to complete the assembly. Because the drive head and related components such as the positioning bracket, limit bracket, drive block, return spring, and drive gear are scattered, each component needs to be installed sequentially. This results in a large volume of output materials, complex assembly, and reliance on manual assembly, reducing the efficiency of finished product assembly. Utility Model Content

[0004] The purpose of this utility model is to provide a drive head assembly and processing box that can simplify assembly steps and improve assembly efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A processing box drive head assembly includes: a drive head, a drive gear, a positioning bracket, and a return spring, a limiting bracket, and a drive block disposed in the inner cavity of the drive gear. The rod of the drive head passes sequentially through the positioning bracket, the limiting bracket, the drive block, the return spring, and the drive gear. The second end of the drive head has a snap-fit ​​portion. The bottom of the inner cavity of the drive gear is provided with a drive head support portion, which has a through hole extending along the axis of the drive gear. At least one snap-fit ​​rib is provided at the bottom of the through hole. The snap-fit ​​portion can be squeezed through the snap-fit ​​rib, protrude outside the drive gear, and snap-fit ​​with the snap-fit ​​rib. The snap-fit ​​rib can restrict the snap-fit ​​portion from retracting into the inner cavity of the drive gear.

[0007] In some embodiments, the latching portion is frustum-shaped and protrudes radially outward.

[0008] In some embodiments, the snap-fit ​​rib is an arc-shaped rib.

[0009] In some embodiments, a pair of oppositely arranged snap-fit ​​ribs are provided at the bottom of the through hole.

[0010] In some embodiments, the snap-fit ​​rib has an inclined guide slope.

[0011] This utility model also provides a processing box, including: a powder hopper body, with a first support and a second support respectively provided at both ends of the powder hopper body, a positioning end cap provided on the outer side of the second support, and the aforementioned processing box drive head assembly provided on the second support, the processing box drive head assembly being located between the second support and the positioning end cap.

[0012] As can be seen from the above technical solution, the present invention provides a snap-fit ​​part and a snap-fit ​​rib on the drive head and drive gear respectively, which can be snapped together. After the drive head and drive gear snap together, the reset spring, drive block, limit bracket and positioning bracket are assembled into a whole. The number of parts shipped has been reduced from 6 to 1, which not only reduces the number of materials shipped, but also simplifies the assembly of 6 parts to 1 part, simplifying the assembly steps and improving the assembly efficiency of the finished product. Attached Figure Description

[0013] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1This is a schematic diagram of the structure of the processing box in an embodiment of the present invention;

[0015] Figure 2 This is a partially exploded structural diagram of the processing box according to an embodiment of the present invention;

[0016] Figure 3 This is an exploded structural diagram of the drive head assembly according to an embodiment of the present utility model;

[0017] Figure 4 This is a cross-sectional view of the drive head assembly assembled according to an embodiment of the present invention;

[0018] Figure 5 This is a top view of the drive gear in an embodiment of the present invention;

[0019] Figure 6 This is a cross-sectional view of the drive gear in an embodiment of the present invention.

[0020] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings. In the detailed description of the embodiments of the present invention, for ease of explanation, the drawings illustrating the device structure will be partially enlarged without adhering to the general scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. It should be noted that the drawings are in a simplified form and use non-precise scales, solely for the purpose of conveniently and clearly illustrating the embodiments of the present invention. Additionally, in the description of this application, terms such as "first" and "second" are used only to distinguish descriptions and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Terms such as "positive," "negative," "bottom," "upper," "lower," "front," "rear," "left," and "right" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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 also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figure 1 and Figure 2 As shown, the processing box in this embodiment includes a toner cartridge body 1 and a toner cartridge cover 2. After the toner cartridge cover 2 and the toner cartridge body 1 are assembled together, they can form a closed space for containing toner. The toner cartridge body 1 is provided with a toner outlet 1a, and a toner dispensing blade 1-1 is provided on the outside of the toner outlet 1a, as well as a developing roller 3 that can rotate around its own axis. A developing roller gear 3-1 is provided at one end of the developing roller 3.

[0024] A first support 4 and a second support 5 are respectively provided at both ends of the powder hopper 1. The first support 4 is a conductive end support, and the second support 5 is a gear end support. The drive head assembly and various transmission gears (such as developing roller gears) are all located on the side where the second support 5 is located.

[0025] A positioning end cap 6 is provided on the outer side of the second bracket 5. The drive head assembly is mounted on the second bracket 5, located between the second bracket 5 and the positioning end cap 6. Figure 3 and Figure 4 As shown, the drive head assembly of this embodiment includes a drive head 7, a drive gear 8, a reset spring 9, a positioning bracket 10, a limiting bracket 11, and a drive block 12.

[0026] The drive gear 8 has an inner cavity that accommodates the return spring 9, the limiting bracket 11, and the drive block 12. A drive head support 8a is provided at the bottom of the inner cavity of the drive gear 8, and the drive head support 8a has a through hole 8b extending along the axis of the drive gear 8. The first end of the drive head 7 has a drive engagement part 7a that mates with the rotary drive component of the image forming apparatus. The second end can extend into the inner cavity of the drive gear 8, and the second end has a frustum-shaped latching part 7b that passes through the through hole 8b of the drive head support 8a and protrudes outside the drive gear 8. For ease of description, the side of the drive head where the drive engagement part is located is defined as the head of the drive head, and the side of the drive head where the latching part is located is defined as the tail of the drive head. The upper bottom surface (smaller diameter bottom surface) of the latching part 7b (frustum) is the end face of the second end of the drive head 7, and the latching part 7b protrudes radially outward. The drive head 7 is inserted into the inner cavity of the drive gear 8. After it is fully inserted, the latching part 7b passes through the through hole 8b and extends out of the drive gear 8.

[0027] like Figure 5 and Figure 6 As shown, at least one locking rib 8c protruding radially inward along the through hole 8b is provided at the bottom of the through hole 8b of the drive head support 8a. The locking rib 8c is used to engage with the latching part 7b of the drive head 7, restricting the latching part 7b from moving axially along the drive gear 8 and preventing the latching part 7b from retracting into the inner cavity of the drive gear 8, thereby allowing it to separate from the drive gear 8.

[0028] In this embodiment, a pair of opposing arc-shaped locking ribs 8c are provided at the bottom of the through hole 8b. The distance between the two locking ribs 8c is slightly smaller than the maximum outer diameter of the locking part 7b. Thus, when the locking part 7b passes through the through hole 8b, the bottom surface of the locking part 7b can be locked onto the locking rib 8c, and the drive head 7 will not disengage from the drive gear 8. To facilitate the locking part 7b passing through the locking rib 8c, the locking rib 8c has an inclined guide slope s. When the locking part 7b of the drive head 7 is inserted into the bottom of the through hole 8b, the locking part 7b moves along the guide slope s. Since the locking part 7b itself is also a frustum shape with a small front end and a large rear end, it can pass through the locking rib 8c under the action of extrusion force and exit the through hole 8b.

[0029] The number of locking ribs 8c is not limited. The function of the locking ribs 8c is to form a lock with the bottom surface of the locking part 7b after the locking part 7b passes through, preventing the drive head 7 from disengaging from the drive gear 8. When there is only one locking rib 8c, the minimum distance between the locking rib 8c and the inner wall of the through hole 8b should be slightly less than the maximum outer diameter of the locking part 7b. When there are two or more locking ribs 8c, the diameter of the inscribed circle of the locking rib 8c should be slightly less than the maximum outer diameter of the locking part 7b. In this way, after the locking part 7b passes through the locking rib 8c, it will be locked and will not disengage. In some embodiments, an expansion joint can be processed at the tail of the drive head 7. The snap-fit ​​part 7b is divided into two symmetrical halves by the expansion joint. When the snap-fit ​​part 7b is squeezed through the snap-fit ​​rib 8c, the snap-fit ​​part 7b will squeeze towards the middle, so as to pass through the snap-fit ​​rib 8c more smoothly. After passing through, it will restore its deformation and the snap-fit ​​part 7b can be snapped with the snap-fit ​​rib 8c and will not fall back into the drive gear 8.

[0030] The reset spring 9, drive block 12, limit bracket 11, and positioning bracket 10 are installed sequentially. The reset spring 9, drive block 12, and limit bracket 11 are housed within the inner cavity of the drive gear 8, with the reset spring 9 located between the bottom wall of the inner cavity of the drive gear 8 and the drive block 12. First, the reset spring 9 is installed into the inner cavity of the drive gear 8. Then, the drive block 12, limit bracket 11, and positioning bracket 10 are assembled sequentially. Finally, the drive head 7 passes through the positioning bracket 10, limit bracket 11, and drive block 12 sequentially. The reset spring 9, drive block 12, limit bracket 11, and positioning bracket 10 in this embodiment have the same structure and connection relationship as the reset spring, drive block, limit bracket, and positioning bracket in a conventional processing box. After the drive head 7 passes through the positioning bracket 10, the limiting bracket 11, and the drive block 12 in sequence, the snap-fit ​​part 7b passes through the through hole 8b of the drive head support part 8a and snaps with the snap-fit ​​rib 8c, thereby assembling the return spring 9, the positioning bracket 10, the limiting bracket 11, the drive block 12, and the drive gear 8 together. The drive head 7, the drive gear 8, the return spring 9, the positioning bracket 10, the limiting bracket 11, and the drive block 12 form an integral drive head assembly.

[0031] When assembling the processing box, first assemble the developing roller gear 3-1, developing roller 3, first bracket 4, and second bracket 5 onto the powder hopper body 1, then assemble the drive head assembly onto the second bracket 5, and finally assemble the positioning end cover 6.

[0032] This utility model provides snap-fit ​​parts and snap-fit ​​ribs on the drive head and drive gear, which can be interlocked. After the drive head and drive gear are interlocked, the reset spring, drive block, limit bracket and positioning bracket are assembled into a whole. The number of parts shipped has been reduced from 6 to 1, which not only reduces the number of materials shipped, but also simplifies the assembly of 6 parts to 1 part, simplifying the assembly steps and improving the assembly efficiency of the finished product (automated assembly can be used).

[0033] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Processing box driver head assembly, including: The drive head, drive gear, positioning bracket, and reset spring, limiting bracket and drive block disposed in the inner cavity of the drive gear, wherein the rod of the drive head passes through the positioning bracket, the limiting bracket and the drive block in sequence; Its features are: The second end of the drive head has a latching part; The bottom of the inner cavity of the drive gear is provided with a drive head support. The drive head support is provided with a through hole extending along the axis of the drive gear. At least one snap-fit ​​rib is provided at the bottom of the through hole. The snap-fit ​​part can be squeezed through the snap-fit ​​rib, protrude outside the drive gear, and snap-fit ​​with the snap-fit ​​rib. The snap-fit ​​rib can restrict the snap-fit ​​part from retracting into the inner cavity of the drive gear.

2. The processing box drive head assembly as described in claim 1, characterized in that: The latching part is frustum-shaped and protrudes outward radially.

3. The processing box drive head assembly as described in claim 1, characterized in that: The fastening reinforcement is an arc-shaped reinforcement.

4. The processing box drive head assembly as described in claim 1 or 3, characterized in that: A pair of oppositely arranged locking ribs are provided at the bottom of the through hole.

5. The processing box drive head assembly as described in claim 1, characterized in that: The snap-fit ​​reinforcement bar has an inclined guide slope.

6. Processing box, including: The powder hopper body has a first support and a second support at its two ends, a positioning end cap on the outer side of the second support, and a processing box drive head assembly as described in any one of claims 1 to 5 on the second support, the processing box drive head assembly being located between the second support and the positioning end cap.

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