A cleaning doctor with self-cleaning

Abstract

The utility model relates to printing equipment cleaning technical field, especially a kind of cleaning doctor with self-cleaning, including cleaning doctor, rail is connected in the side top of cleaning doctor, rail top is slidably connected with connecting plate, motor is installed in connecting plate, rail top is rotatably connected with gyro wheel, the output shaft of motor is coaxially connected with gyro wheel, connecting plate bottom is provided with mounting plate, mounting plate is screw-connected with several fixed screws, cleaning plate is connected on the side of cleaning doctor in mounting plate by fixed screw, cleaning plate is slidably connected with cleaning doctor, connecting assembly is arranged between connecting plate and mounting plate, connecting assembly is used to stabilize rail and connecting plate connection, and quickly separate rail and connecting plate. Through the sliding fit of scraper and rail, scraper continuously removes carbon powder particles on the surface of rail, maintains the friction coefficient of gyro wheel and rail contact surface stable, thereby reducing the residue of carbon powder at the edge of doctor blade and the microscopic recesses of photosensitive drum, improve cleaning efficiency.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment cleaning technology, and in particular to a self-cleaning cleaning scraper. Background Technology

[0002] In modern office equipment, laser printers, as core output devices, rely on the precise distribution of charge on the surface of the photosensitive drum and the uniform adsorption of toner for their imaging principle. The cleaning blade, a key component of the printer's drum assembly, plays a crucial role in removing residual toner from the photosensitive drum surface. Through physical contact with the drum surface, the blade must effectively strip toner while rotating at high speed, ensuring the drum surface is clean and residue-free before the next image capture. This guarantees the clarity and stability of the printed image, and its performance directly affects print quality and the lifespan of the equipment.

[0003] Existing cleaning blades are mostly made of flexible metal sheets or composite materials, and toner removal is achieved through preset blade angle and pressure control. During laser printer operation, residual toner on the photosensitive drum surface that has not been transferred needs to be scraped off by the blade into the waste toner container. Traditional blade designs focus on optimizing material wear resistance and blade sharpness, such as using beryllium bronze or stainless steel, combined with precision machining processes to ensure the straightness of the blade edge and surface finish, thereby achieving basic toner removal under normal operating conditions.

[0004] However, toner is prone to electrostatic adsorption between the doctor blade and the surface of the photosensitive drum, causing micron-sized toner particles to adhere to the doctor blade or the micro-pits of the photosensitive drum, forming a residue layer that is difficult to remove. The electrostatic field generated by long-term friction between the doctor blade and the photosensitive drum may cause secondary toner adhesion, reducing cleaning efficiency. Traditional doctor blades lack an active cleaning mechanism and rely solely on passive scraping. In continuous printing or high humidity environments, residual toner is prone to accumulating into clumps, resulting in incomplete scraping and causing problems such as background graying and blurry images. Utility Model Content

[0005] To overcome the drawbacks of electrostatic adsorption of toner residue, this invention provides a self-cleaning cleaning scraper, aiming to solve the aforementioned shortcomings.

[0006] A self-cleaning cleaning scraper, comprising a cleaning scraper body, a rail is connected to the top of the side edge of the cleaning scraper body, the cross section of the rail is in a "convex" shape, a connecting plate is slidably connected to the top of the rail, a motor is installed in the connecting plate, a roller is rotatably connected to the top of the rail, the output shaft of the motor is coaxially connected with the roller, a mounting plate is arranged at the bottom of the connecting plate, a plurality of fixing screws are threadedly connected to the mounting plate, the side of the mounting plate facing the cleaning scraper body is connected with a cleaning plate through the fixing screws, the cleaning plate is slidably connected with the cleaning scraper body, a connecting assembly is arranged between the connecting plate and the mounting plate, and the connecting assembly is used for stabilizing the connection between the rail and the connecting plate and quickly separating the rail and the connecting plate.

[0007] In a preferred embodiment of the present utility model, the connecting assembly comprises a guide rod, an L-shaped plate is connected to the top of the mounting plate, the L-shaped plate is slidably connected to the bottom of the rail, a return spring is arranged in the connecting plate, the guide rod is slidably connected in the connecting plate, the bottom of the guide rod is connected with the mounting plate, one end of the return spring is connected with the top of the guide rod, and the other end is connected in the connecting plate.

[0008] In a preferred embodiment of the present utility model, a cover plate for enclosing the motor is connected to the side edge of the connecting plate.

[0009] In a preferred embodiment of the present utility model, scrapers are connected to both the left and right sides of the top of the connecting plate, the scrapers are connected to both the left and right sides of the L-shaped plate, and the scrapers are slidably connected with the rail.

[0010] In a preferred embodiment of the present utility model, protective pads are arranged at all openings of the mounting plate for threaded connection with the fixing screws.

[0011] In a preferred embodiment of the present utility model, an auxiliary plate is connected to the mounting plate.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: 1. Through the sliding fit of the scrapers and the rail, the scrapers continuously scrape off toner particles on the surface of the rail, so as to maintain a stable friction coefficient of the contact surface between the roller and the rail, avoid the electrostatic adsorption effect caused by toner accumulation, thereby reducing the residual toner at the blade edge of the cleaning scraper and in the microscopic pits of the photosensitive drum, and improving the cleaning efficiency.

[0013] 2. Through the upper and lower clamping structure formed by the L-shaped plate and the roller, the bottom of the L-shaped plate is tightly attached to the lower surface of the rail to form a stable fit with the roller, which ensures no offset or shaking when the connecting plate slides, avoids the problem of incomplete toner scraping caused by unstable movement of the scraper, and reduces the risk of residual toner accumulation. Brief Description of the Drawings

[0014] Figure 1 is a schematic diagram of the overall structure of the present utility model.

[0015] Figure 2 is a cross-sectional view of the mounting structure of the roller and the connection plate of the present utility model.

[0016] Figure 3 is an exploded view of the connection relationship between the fixing screw and the mounting plate of the present utility model.

[0017] The marks of each component in the accompanying drawings are as follows: 1. Cleaning scraper, 2. Rail, 3. Connection plate, 4. Roller, 5. Motor, 6. Mounting plate, 7. Cleaning plate, 8. Fixing screw, 9. Guide rod, 10. L-shaped plate, 11. Return spring, 12. Cover plate, 13. Scraper plate, 14. Protective pad, 15. Auxiliary plate. DETAILED DESCRIPTION

[0018] First of all, it should be noted that in the differently described embodiments, identical components are provided with identical reference numerals or identical component names, wherein the disclosure contained throughout the specification can be transferred in meaning to identical components having identical reference numerals or identical component names. The position specifications selected in the specification, such as up, down, lateral direction and the like, also refer to the directly described and illustrated accompanying drawings and can be transferred in meaning to the new position when the position is changed.

[0019] Embodiment: A self-cleaning cleaning scraper, as shown in Figures 1-3 the figure, comprises a cleaning scraper 1, a rail 2, a connection plate 3, a roller 4, a motor 5, a mounting plate 6, a cleaning plate 7, a plurality of fixing screws 8 and a connection assembly. The top of the side edge of the cleaning scraper 1 is connected with the rail 2. The cross section of the rail 2 is in a "convex" shape, and the top end of the convex shape is connected with the cleaning scraper 1. The top of the rail 2 is slidably connected with the connection plate 3. The motor 5 is installed in the connection plate 3. The top of the rail 2 is rotatably connected with the roller 4. The output shaft of the motor 5 is coaxially connected with the roller 4. The bottom of the connection plate 3 is provided with the mounting plate 6. The mounting plate 6 is in threaded connection with a plurality of fixing screws 8. On the side facing the cleaning scraper 1, the mounting plate 6 is connected with the cleaning plate 7 through the fixing screws 8. The fixing screws 8 are in threaded connection with the cleaning plate 7. The cleaning plate 7 is slidably connected with the cleaning scraper 1. The connection assembly is arranged between the connection plate 3 and the mounting plate 6, and is used for stabilizing the connection between the rail 2 and the connection plate 3 and quickly separating the rail 2 from the connection plate 3. The rail 2 is made of aluminum alloy, and the surface thereof is anodized to improve wear resistance and corrosion resistance.

[0020] As shown in Figure 2As shown, the connecting assembly includes a guide rod 9, an L-shaped plate 10, and a return spring 11. The L-shaped plate 10 is connected to the top of the mounting plate 6 and is slidably connected to the bottom of the track 2. The L-shaped plate 10 is made of 304 stainless steel and is smooth and burr-free. The contact surface with the track 2 is polished to reduce sliding friction resistance. The return spring 11 is installed inside the connecting plate 3. The guide rod 9 is slidably connected inside the connecting plate 3. The bottom of the guide rod 9 is connected to the mounting plate 6. The sliding stroke length of the guide rod 9 inside the connecting plate 3 is greater than the sum of the heights of the protrusions at the top and bottom ends of the track. One end of the return spring 11 is connected to the top of the guide rod 9, and the other end is connected inside the connecting plate 3.

[0021] like Figure 2 As shown, it also includes a cover plate 12. The side of the connecting plate 3 is connected to a cover plate 12 for sealing the motor 5. The cover plate 12 is made of ABS engineering plastic injection molding, with uniform thickness and sealing strips on the edges, which effectively prevents carbon powder from entering the motor 5 area.

[0022] like Figure 2 As shown, it also includes a scraper 13. The top left and right sides of the connecting plate 3 are connected to scrapers 13, and the left and right sides of the L-shaped plate 10 are connected to scrapers 13. The scrapers 13 are slidably connected to the track 2. The scrapers 13 are made of silicone rubber and can effectively remove carbon powder particles from the surface of the track 2.

[0023] like Figure 2 As shown, it also includes a protective pad 14. The holes of the screws 8 for threaded connection of the mounting plate 6 are all provided with protective pads 14. The protective pads 14 are made of neoprene rubber, which has moderate elasticity and can prevent toner from seeping in from the screw holes.

[0024] like Figure 1 As shown, it also includes an auxiliary plate 15. The mounting plate 6 is connected to the auxiliary plate 15. The auxiliary plate 15 is made of aluminum alloy profile and has a sandblasted surface to increase the coefficient of friction and facilitate stable force application by the operator.

[0025] When motor 5 is started via an external control switch or the printer enters an idle state, it drives roller 4 to rotate along the grooved surface of the raised structure of track 2. At this time, roller 4 generates friction with the upper surface of track 2, pushing connecting plate 3 to slide smoothly along the length of track 2. Mounting plate 6 moves synchronously with connecting plate 3, causing cleaning plate 7 to adhere to the surface of cleaning scraper 1 for linear scraping action, removing residual toner. During this process, L-shaped plate 10 and roller 4 are located on the upper and lower sides of track 2 respectively, forming a clamping structure. The bottom of L-shaped plate 10 is in close contact with the lower surface of track 2, and the upper and lower cooperation with roller 4 ensures that connecting plate 3 slides without deviation or shaking. Scraper 13 moves synchronously with connecting plate 3 and L-shaped plate 10, and its blade continuously removes toner particles adhering to the surface of track 2, maintaining a stable coefficient of friction between roller 4 and track 2, and avoiding slippage due to toner accumulation.

[0026] If the cleaning effect of the cleaning scraper 1 decreases after long-term use, the operator should first pull the mounting plate 6 downwards using the auxiliary plate 15, causing the guide rod 9 to slide vertically within the connecting plate 3 and stretch the return spring 11. At this time, the bottom of the L-shaped plate 10 gradually detaches from the lower surface of the track 2, releasing its clamping state with the roller 4. Keeping the relative positions of the connecting plate 3 and the mounting plate 6 fixed, the connecting plate 3 is lifted horizontally away from the track 2. During this process, attention should be paid to the separation angle between the scraper 13 and the track 2 to avoid secondary adhesion of carbon powder. Then, the protective pad 14 is removed, and the fixing screws 8 are loosened to separate the cleaning plate 7 from the mounting plate 6, allowing the cleaning plate 7 to be cleaned or replaced. During reassembly, the cleaning plate 7 is first fixed to the designated position on the mounting plate 6 using the fixing screws 8, and the protective pad 14 is reinstalled. Then, the assembly of the connecting plate 3 and the mounting plate 6 is aligned with the mounting position on the track 2, ensuring that the roller 4 is embedded in the groove on the upper surface of the track 2, and the L-shaped plate 10 is located below the track 2. After the auxiliary plate 15 is released, the return spring 11 retracts and rebounds, pulling the mounting plate 6 and L-shaped plate 10 upwards via the guide rod 9, causing the L-shaped plate 10 to re-clamp into the lower surface of the track 2, forming a stable clamp with the roller 4. Finally, the cover plate 12 closes the area of ​​the motor 5, forming a toner protection barrier together with the protective pad 14 to prevent toner from flying and spreading during the cleaning process.

[0027] Although this disclosure has been described with respect to only a limited number of embodiments, those skilled in the art who benefit from this disclosure will understand that various other embodiments can be devised without departing from the scope of this invention. Therefore, the scope of this invention should be limited only by the appended claims.

Claims

1. A self-cleaning cleaning scraper, characterized in that, comprising a cleaning scraper (1), wherein the top of the side edge of the cleaning scraper (1) is connected with a rail (2), the cross section of the rail (2) is in a shape of a "convex" character, the top of the rail (2) is slidably connected with a connecting plate (3), a motor (5) is mounted inside the connecting plate (3), the top of the rail (2) is rotatably connected with a roller (4), the output shaft of the motor (5) is coaxially connected with the roller (4), the bottom of the connecting plate (3) is provided with a mounting plate (6), the mounting plate (6) is in threaded connection with a plurality of fixing screws (8), the side of the mounting plate (6) facing the cleaning scraper (1) is connected with a cleaning plate (7) via the fixing screws (8), the cleaning plate (7) is slidably connected with the cleaning scraper (1), a connection assembly is arranged between the connecting plate (3) and the mounting plate (6), and the connection assembly is used for stabilizing the connection between the rail (2) and the connecting plate (3) and quickly separating the rail (2) and the connecting plate (3).

2. A self-cleaning cleaning scraper according to claim 1, characterized in that, The connection assembly comprises a guide rod (9), the top of the mounting plate (6) is connected with an L-shaped plate (10), the L-shaped plate (10) is slidably connected to the bottom of the rail (2), a return spring (11) is arranged inside the connecting plate (3), the guide rod (9) is slidably connected inside the connecting plate (3), the bottom of the guide rod (9) is connected with the mounting plate (6), one end of the return spring (11) is connected with the top of the guide rod (9), and the other end is connected inside the connecting plate (3).

3. A self-cleaning cleaning scraper according to claim 2, characterized in that, The side edge of the connecting plate (3) is connected with a cover plate (12) for enclosing the motor (5).

4. A self-cleaning cleaning scraper according to claim 3, characterized in that, The left and right sides of the top of the connecting plate (3) are both connected with scrapers (13), the left and right sides of the L-shaped plate (10) are both connected with the scrapers (13), and the scrapers (13) are slidably connected with the rail (2).

5. A self-cleaning cleaning scraper according to claim 4, characterized in that, Protective gaskets (14) are respectively arranged at the opening positions where the mounting plate (6) is in threaded connection with the fixing screws (8).

6. A self-cleaning cleaning scraper according to claim 5, characterized in that, The mounting plate (6) is connected with an auxiliary plate (15).

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