Assembly structure of powder outletting knife for selenium drum

Abstract

This utility model discloses an assembly structure for a toner cartridge powder ejector blade, comprising: a blade holder detachably mounted on a developing cartridge housing; and a blade, the blade including a connecting part connected to the blade holder and a working part in contact with the surface of the developing roller, the connecting part of the blade being bonded to the blade holder; characterized in that: the blade holder has an "L"-shaped cross-section, the developing cartridge housing has a supporting step, the blade holder is in contact with the surface of the supporting step, both ends of the blade holder have through holes, the developing cartridge housing has threaded holes opposite the through holes, and the blade holder and the developing cartridge housing are fixedly connected by screws. This assembly structure for a toner cartridge powder ejector blade has the advantages of improving the installation accuracy and stability of the blade holder, extending its service life, and improving reliability.

Description

Technical Field

[0001] This utility model relates to the field of laser printer technology, and in particular to an assembly structure for a toner cartridge ejector blade. Background Technology

[0002] In laser printing technology, the toner cartridge is a core component, and its performance directly affects print quality and efficiency. The toner ejector blade, as a key component of the toner cartridge, plays an indispensable role. The toner ejector blade primarily performs two important tasks: first, it contacts the surface of the developing roller, causing the toner particles to become charged—a crucial step in achieving precise toner transfer to the printing medium; second, it precisely controls the thickness of the toner layer on the surface of the developing roller sleeve, ensuring that the toner is ejected evenly, thereby guaranteeing the clarity and color uniformity of the printed image. If the toner ejector blade malfunctions, uneven toner distribution will result, leading to defects in the printed image such as gray undertones, pale colors, and toner splatter, severely impacting visual quality.

[0003] Currently, the structure of common toner cartridge ejector blades on the market includes a blade holder and blades bonded to the blade holder. The blade holder has perforations at both ends, and the assembly of the blade holder to the developer cartridge housing is solely through screws at both ends—a two-point connection structure. This has the following problems: 1. During operation, the ejector blade needs to maintain continuous contact with the surface of the developer roller, generating frictional pressure. This assembly method results in a lack of effective fixation in the middle area of ​​the blade holder, leading to deformation of the ejector blade over time, resulting in uneven printing color depth and even toner leakage; 2. The lack of a positioning structure during the assembly of the blade holder and the developer cartridge housing, relying on the operator's assembly experience, easily leads to blade holder tilting, causing inconsistent contact pressure between the two ends of the blade and the developer roller, further exacerbating the problem of uneven toner distribution; 3. Short service life. When problems occur, the toner cartridge needs to be disassembled, which is cumbersome, time-consuming, and labor-intensive. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this patent application is how to provide an assembly structure for the toner cartridge powder discharge blade that can improve the installation accuracy and stability of the blade holder, extend its service life, and improve its reliability.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] An assembly structure for a toner cartridge dispensing blade includes:

[0007] A blade holder, which is detachably mounted on the developing cartridge housing;

[0008] The blade includes a connecting part connected to the blade holder and a working part in contact with the surface of the developing roller, wherein the connecting part of the blade is bonded to the blade holder;

[0009] The blade holder has an "L" shaped cross-section. The developing cartridge housing has a supporting step. The blade holder fits into the surface of the supporting step. Both ends of the blade holder have through holes. The developing cartridge housing has threaded holes opposite the through holes. The blade holder and the developing cartridge housing are fixedly connected by screws.

[0010] The developer cartridge is the core component of the toner cartridge, and it mainly includes the developer cartridge housing, the developer roller which is rotatably installed in the housing, and the toner dispensing blade which is in contact with the developer roller.

[0011] In the above technical solution, the blade holder is detachably connected to the developing cartridge housing via screws at both ends, which improves the convenience of assembly and maintenance. To improve the installation accuracy of the toner ejector blade, a support step is provided on the developing cartridge housing, and the blade holder is set in an L-shape. The blade holder fits snugly against the surface of the support step, which enables the blade holder to be positioned. During the use of the toner ejector blade, the force on the blade is transmitted out of the developing cartridge through the support step, which reduces the shaking and displacement of the blade holder during use, ensures the contact force between the blade and the developing roller, and thus improves the control accuracy of the toner.

[0012] Preferably, the supporting step of the developing cartridge housing is recessed downward to form a limiting groove. Several limiting structures are spaced apart in the limiting groove. The limiting structure includes four rectangular limiting blocks, which are spaced apart from each other. The four limiting blocks form a cross-shaped slot. The blade holder is fixed with a limiting post that can be inserted into the slot. The limiting post is cross-shaped.

[0013] Preferably, a plurality of stiffening plates are fixed inside the limiting groove, and the two sides of the stiffening plates are fixedly connected to the side wall of the limiting groove.

[0014] Preferably, all the limiting blocks are provided with weight reduction holes.

[0015] Preferably, the limiting post includes a cylinder and four inserts integrally formed with the cylinder, and the limiting blocks are provided with clearance openings corresponding to the cylinder.

[0016] Preferably, the developing cartridge housing has a sealing groove facing the blade holder, and a sealing gasket is fixedly installed in the sealing groove, with the blade holder pressed against the outside of the sealing gasket.

[0017] Preferably, the tool holder is provided with a mounting groove, which is U-shaped, and the connecting end of the blade is bonded to the mounting groove.

[0018] In summary, the assembly structure of the toner cartridge's dispensing blade has the advantages of improving the installation accuracy and stability of the blade holder, extending its service life, and enhancing its reliability. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the assembly structure of a toner cartridge dispensing blade according to the present invention.

[0020] Figure 2 for Figure 1 A schematic diagram illustrating the fit between the powder discharge blade assembly structure and the developing roller.

[0021] Figure 3 for Figure 1 A schematic diagram of the splitting mechanism.

[0022] Figure 4 This is a schematic diagram of the tool holder structure.

[0023] Figure 5 This is a schematic diagram of the back structure of the developer cartridge housing.

[0024] Figure 6 for Figure 5 A magnified structural diagram of point A in the middle. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. In the description of the present invention, it should be understood that directional terms such as "upper," "lower," "top," and "bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional terms 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 limiting the scope of protection of the present invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0026] like Figure 1-6 As shown, an assembly structure for a toner cartridge's toner dispensing blade includes:

[0027] Blade holder 1, which is detachably mounted on the developing cartridge housing 2;

[0028] Blade 3, the blade includes a connecting part connected to the blade holder and a working part in contact with the surface of the developing roller, the connecting part of the blade being bonded to the blade holder;

[0029] The blade holder has an "L" shaped cross section. The developing cartridge housing has a supporting step 4. The blade holder is in contact with the surface of the supporting step. Both ends of the blade holder have through holes 5. The developing cartridge housing has a threaded hole 6 opposite to the through holes. The blade holder and the developing cartridge housing are fixedly connected by screws 7.

[0030] The developing cartridge is the core component of the toner cartridge, and it mainly includes the developing cartridge housing 2, the developing roller 8 which is rotatably installed in the housing, and the toner dispensing blade that contacts the developing roller.

[0031] In the above technical solution, the blade holder is detachably connected to the developing cartridge housing via screws at both ends, which improves the convenience of assembly and maintenance. To improve the installation accuracy of the toner ejector blade, a support step is provided on the developing cartridge housing, and the blade holder is set in an L-shape. The blade holder fits snugly against the surface of the support step, which enables the blade holder to be positioned. During the use of the toner ejector blade, the force on the blade is transmitted out of the developing cartridge through the support step, which reduces the shaking and displacement of the blade holder during use, ensures the contact force between the blade and the developing roller, and thus improves the control accuracy of the toner.

[0032] In practice, the supporting steps of the developing cartridge housing are recessed downward to form a limiting groove. Several limiting structures are spaced apart in the limiting groove. The limiting structure includes four rectangular limiting blocks 9, which are spaced apart from each other. The four limiting blocks form a cross-shaped slot 10. The blade holder is fixed with a limiting post 11 that can be inserted into the slot. The limiting post is cross-shaped.

[0033] In the above technical solution, to further improve the installation accuracy between the blade holder and the developing cartridge housing, a limiting groove is provided in the developing cartridge housing. Four limiting blocks form slots, which are then engaged with limiting posts to achieve positioning of the blade holder and the developing cartridge. This limiting structure improves the assembly accuracy of the blade holder, reduces the problem of poor contact between the blade and the developing roller caused by blade holder installation deviations, effectively enhances the stability of the toner delivery blade during use, and improves print quality.

[0034] In implementation, multiple stiffening plates 12 are fixed inside the limiting groove, and the two sides of the stiffening plates are fixedly connected to the side walls of the limiting groove. The presence of the stiffening plates significantly enhances the structural strength of the limiting groove area, enabling it to better withstand the pressure transmitted by the blade holder during operation and preventing the limiting groove from deforming due to long-term stress. At the same time, the reinforcement effect of the stiffening plates helps to disperse the contact stress between the blade holder and the developing cartridge housing, extending the service life of the developing cartridge housing and improving the reliability of the entire powder dispensing blade assembly structure in complex working environments.

[0035] In implementation, each of the limiting blocks is equipped with weight-reducing holes 13. Without affecting the positioning and support functions of the limiting blocks, the overall weight of the developing cartridge housing is effectively reduced, thus lowering manufacturing costs.

[0036] In implementation, the limiting post includes a cylinder and four insert blocks integrally formed with the cylinder, with each limiting block having a clearance opening corresponding to the cylinder. The integral forming of the cylinder and insert blocks into the limiting post increases the strength between adjacent insert blocks, improving the reliability of the connection between the blade holder and the developing roller housing.

[0037] In implementation, the developing cartridge housing has a sealing groove directly opposite the blade holder, and a sealing gasket 14 is fixedly installed within the sealing groove. The blade holder is pressed against the outside of the sealing gasket. The sealing gasket at this location effectively prevents toner leakage from the connection between the blade holder and the developing cartridge housing, avoiding toner contamination of other internal printer components and affecting normal printer operation. Simultaneously, the sealing gasket also acts as a buffer, reducing friction between the blade holder and the developing cartridge housing caused by vibration, extending the service life of both, improving print quality, and ensuring the toner cartridge maintains good sealing performance throughout long-term use.

[0038] In practice, the tool holder is provided with a mounting groove 15, which is U-shaped, and the connecting end of the blade is bonded to the mounting groove. The structure of the U-shaped groove can effectively wrap the connecting part of the blade, increase the bonding area between the blade and the tool holder, improve the bonding strength, and at the same time position the blade so that the blade and the tool holder are accurately connected.

[0039] This assembly structure enables a stable connection between the toner dispenser blade and the developer cartridge housing, extending the service life of the toner dispenser blade, improving print quality, and reducing print defects.

[0040] Finally, it should be noted that those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An assembly structure for a toner cartridge dispensing blade, comprising: A blade holder (1) is detachably mounted on the developing cartridge housing (2); Blade (3), the blade includes a connecting part connected to the blade holder and a working part in contact with the surface of the developing roller, the connecting part of the blade is bonded to the blade holder; Its features are: The blade holder has an "L" shaped cross section. The developing cartridge housing has a supporting step (4). The blade holder is in contact with the surface of the supporting step. Both ends of the blade holder have through holes (5). The developing cartridge housing has a threaded hole (6) opposite the through hole. The blade holder and the developing cartridge housing are fixedly connected by screws (7).

2. The assembly structure of a toner cartridge dispensing blade according to claim 1, characterized in that, The supporting step of the developing cartridge housing is recessed downward to form a limiting groove. Several limiting structures are arranged at intervals in the limiting groove. The limiting structure includes four rectangular limiting blocks (9), which are spaced apart from each other. The four limiting blocks form a cross-shaped slot (10). The blade holder is fixed with a limiting post (11) that can be inserted and cooperate with the slot. The limiting post is cross-shaped.

3. The assembly structure of a toner cartridge dispensing blade according to claim 2, characterized in that, Multiple stiffeners (12) are fixed inside the limiting groove, and the two sides of the stiffeners are fixedly connected to the side wall of the limiting groove.

4. The assembly structure of a toner cartridge dispensing blade according to claim 2, characterized in that, Each of the limiting blocks is provided with a weight reduction hole (13).

5. The assembly structure of a toner cartridge dispensing blade according to claim 2, characterized in that, The limiting post includes a cylinder and four inserts integrally formed with the cylinder, and the limiting blocks are provided with clearance openings corresponding to the cylinder.

6. The assembly structure of a toner cartridge dispensing blade according to claim 1, characterized in that, The developing cartridge housing has a sealing groove facing the blade holder, and a sealing gasket (14) is fixedly installed in the sealing groove, with the blade holder pressed against the outside of the sealing gasket.

7. The assembly structure of a toner cartridge dispensing blade according to claim 1, characterized in that, The tool holder is provided with a mounting groove (15), which is U-shaped, and the connecting end of the blade is glued to the mounting groove.

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