Self-service printing device with electrostatic dust removal function

Abstract

The utility model discloses a kind of self-service printing equipment with electrostatic dust removal function, including shell, its two ends are respectively provided with the paper outlet of the communication with the printing area of self-service printer and the paper inlet of the communication with the paper outlet area of self-service printer, electrostatic dust removal unit, micro dust removal unit and dust suction unit are sequentially arranged in shell inside along paper transmission path from paper inlet side to paper outlet side, conveyor is installed on the load-bearing pedestal built-in shell, paper guide plate is equipped between the joint of conveyor and paper inlet and paper outlet, electrostatic dust removal unit includes cantilever one fixed in shell top wall, the end of cantilever one is fixedly connected with support frame, high-voltage generator is installed in the side of support frame, support frame is installed with bracket, high-voltage generator and tungsten needle electrode array installed on the bottom surface of bracket are electrically connected, the top wall of shell is also fixedly connected with cantilever two, the end is fixedly connected with load-bearing frame, and positive pressure source is installed on the side wall of load-bearing frame.

Description

Technical Field

[0001] This utility model relates to the field of self-service printing technology, specifically a self-service printing device with electrostatic dust removal function. Background Technology

[0002] Self-service printing equipment is widely used in public service scenarios due to its unattended and 24-hour service characteristics. The equipment integrates advanced printing technology, network communication and payment system. Users can authenticate their identity and upload files through ID card, QR code or online account, so as to print various materials such as documents, photos and certificates by themselves.

[0003] In existing technologies, during the printing process, a large amount of paper dust often adheres to the surface of the paper. The particle size of this paper dust is in the tiny range of 5-50μm. When the paper enters the printing stage, this paper dust is easily adsorbed, resulting in obvious defects such as "white spots" and "blur" in the printed output, which greatly reduces the pass rate of image quality. The traditional electrostatic dust removal method has extremely low capture efficiency when facing such tiny particles. Even after dust removal, a considerable amount of residual dust still exists. This residual dust not only seriously shortens the service life of the print head, but also adheres to the surface of key components such as rollers and drums. In order to ensure the normal operation of the equipment, it is necessary to manually disassemble and clean the machine every week. Each cleaning requires a long downtime, which greatly affects the continuity and efficiency of printing work. Utility Model Content

[0004] The purpose of this utility model is to provide a self-service printing device with electrostatic dust removal function to solve the problem mentioned in the background art that paper dust on the surface of the paper is easily adsorbed during printing, resulting in defects such as "white spots" and "blurriness" in the images and text, which reduces the pass rate.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A self-service printing device with electrostatic dust removal function includes a housing, with a paper output port communicating with the printing area of ​​the self-service printer and a paper input port communicating with the paper output area of ​​the self-service printer at both ends. Inside the housing, along the paper transport path from the paper input port side to the paper output port side, an electrostatic dust removal unit, a micro-dust removal unit, and a dust collection unit are arranged sequentially. A conveyor is installed on the support base inside the housing. Paper guide plates are provided at the connection points between the conveyor and the paper input port and the paper output port. The electrostatic dust removal unit includes a cantilever fixed to the top wall of the housing. A support frame is fixed to the end of the cantilever. The side of the support frame... A high-voltage generator is installed, and a support frame is installed inside the support frame. The high-voltage generator is electrically connected to a tungsten needle electrode array installed on the bottom surface of the support frame. A cantilever is also fixed to the top wall of the outer shell, and a support frame is fixed to its end. A positive pressure source is installed on the side wall of the support frame. The positive pressure source is electrically connected to an arc-shaped adsorption plate set inside the support frame. A micro-dust removal unit is used to remove residual particles, and a dust collection unit is set at the end of the transmission path to collect free dust particles that have detached from the paper surface. When the paper passes through the electrostatic dust removal area, the tungsten needle electrode array excites corona discharge, causing the dust suspended on the paper surface to be negatively charged. Under the action of the electric field force, the dust is adsorbed onto the surface of the arc-shaped adsorption plate of the positive electrode.

[0006] Based on the preferred embodiment of this technical solution, the dust removal unit includes a support plate one and a support plate two fixedly mounted on the upper surface of the conveyor housing. The surface of the support plate one is provided with a bearing seat, and the surface of the support plate two is equipped with a servo motor. A cleaning roller is rotatably connected inside the bearing seat. One end of the cleaning roller is fixedly connected to the output shaft of the servo motor. The servo motor is used to drive the cleaning roller to rotate. Nylon tendrils are provided on the outer wall surface of the cleaning roller. A dust collection box is detachably connected between the support plate one and the support plate two. A cleaning scraper that contacts the surface of the cleaning roller is provided on the dust collection box. Dust slides down into the dust collection box through the cleaning scraper.

[0007] According to the preferred embodiment of this technical solution, the dust collection unit includes a partition plate fixed to the upper surface of the conveyor housing. An electric push rod is provided on the upper surface of the partition plate. A connecting rod is installed on the air outlet side of the electric push rod. A top plate is fixed to the end of the connecting rod. A dust collection pipe is provided on the surface of the top plate through a retaining ring. A dust collection hood is provided at the air inlet of the dust collection pipe. A hose is connected to the air outlet of the dust collection pipe. A dust collection fan is also provided on the upper surface of the partition plate. The air outlet side of the dust collection fan is connected to one end of the hose through a filter mechanism.

[0008] According to the preferred embodiment of this technical solution, the filtration mechanism includes a filter box disposed on the upper surface of the enclosure plate, at least two sets of filter plates are slidably connected inside the filter box, a filter membrane is disposed on the filter plate, a convex rail is integrally fixed to the side wall of the filter plate, and a sliding groove is provided on the inner wall of the filter box, with the convex rail and the sliding groove being slidably connected.

[0009] Based on the preferred embodiment of this technical solution, the side wall of the dust collection box is integrally fixed with a convex rail two, and the inner walls of both the support plate one and the support plate two are provided with sliding groove two, and the convex rail two is slidably connected to the sliding groove two.

[0010] In the preferred embodiment of this technical solution, a magnet is provided on the contact surface between the convex rail and the slide groove, and the convex rail and the slide groove are magnetically connected.

[0011] In the preferred embodiment of this technical solution, magnets are also provided on the contact surfaces of the second convex rail and the second slide groove, and the second convex rail and the second slide groove are magnetically connected.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. The combination of tungsten needle electrode array and arc-shaped curved adsorption plate enables the directional migration of dust through a high-voltage electric field, improving the removal efficiency of suspended particles (such as toner and paper fibers) on paper surface without the need for physical contact. 2. The nylon whisker cleaning roller adapts to the microscopic unevenness of the paper surface through elastic deformation, which can remove residual micron-sized particles while avoiding rigid contact that could damage the paper. 3. The vacuum fan generates negative pressure, which draws the suspended dust that the nylon whisker cleaning rollers failed to capture and the dust scraped off by the scraper into the filter box, thus avoiding secondary pollution; 4. The dust collection box adopts a magnetic sliding rail structure, which can be replaced without tools and can be disassembled within 5 seconds. Compared with the traditional bolt fixing method, the maintenance efficiency is improved. The filter plate is fixed by magnetic attraction, which supports quick replacement with one hand and avoids the wear and tear problem caused by frequent operation of the traditional buckle structure. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of one embodiment of a self-service printing device with electrostatic dust removal function according to this utility model; Figure 2 This is a schematic diagram of the electrostatic dust removal unit of this utility model; Figure 3 This is a schematic diagram of the micro-dust removal unit of this utility model; Figure 4 This is a schematic diagram of the dust collection unit of this utility model; Figure 5 This is a schematic diagram of the structure of the filter box of this utility model; Figure 6 This is a schematic diagram of the dust collection box of this utility model.

[0014] In the diagram: 1. Outer casing; 2. Paper outlet; 3. Paper inlet; 4. Conveyor; 5. Guide plate; 6. Cantilever 1; 7. Support frame; 8. High-voltage generator; 9. Support bracket; 10. Tungsten needle electrode array; 11. Cantilever 2; 12. Bearing frame; 13. Positive pressure source; 14. Arc-shaped curved surface adsorption plate; 15. Support plate 1; 16. Support plate 2; 17. Bearing seat; 18. Servo motor; 19. Cleaning... 20. Cleaning roller; 21. Dust collection box; 22. Cleaning scraper; 23. Enclosure panel; 24. Electric push rod; 25. Connecting rod; 26. Top plate; 27. Suction pipe; 28. Dust collection hood; 29. ​​Hose; 30. Suction fan; 31. Filter box; 32. Filter plate; 33. Filter membrane; 34. Convex rail one; 35. Slide rail one; 36. Convex rail two; 37. Sealed door; 38. Glass window. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-6This utility model provides an embodiment: a self-service printing device with electrostatic dust removal function, including a housing 1, with a paper output port 2 communicating with the printing area of ​​the self-service printer and a paper input port 3 communicating with the paper output area of ​​the self-service printer at both ends. Inside the housing 1, along the paper transport path from the paper input port 3 side to the paper output port 2 side, an electrostatic dust removal unit, a micro-dust removal unit, and a dust suction unit are arranged sequentially. A conveyor 4 is installed on the support base inside the housing 1. Paper guide plates 5 are provided at the connection between the conveyor 4 and the paper input port 3 and the paper output port 2. The electrostatic dust removal unit includes a cantilever 6 fixed to the top wall of the housing 1, with the end of the cantilever 6... A support frame 7 is fixedly attached, and a high-voltage generator 8 is mounted laterally on the support frame 7. A support frame 9 is installed inside the support frame 7. The high-voltage generator 8 is electrically connected to a tungsten needle electrode array 10 installed on the bottom surface of the support frame 9. A cantilever 11 is also fixedly attached to the top wall of the outer casing 1, and a support frame 12 is fixedly attached to its end. A positive pressure source 13 is installed on the side wall of the support frame 12, and the positive pressure source 13 is electrically connected to an arc-shaped curved surface adsorption plate 14 disposed inside the support frame 12. A micro-dust removal unit is used to remove residual particles, and a dust collection unit is located at the end of the transmission path to collect free dust particles that have detached from the paper surface. When the paper passes through the electrostatic dust removal area, the tungsten needle electrode array 10... A corona discharge is induced, causing dust particles to suspend on the paper surface and become negatively charged. Under the action of an electric field, the dust particles are adsorbed onto the surface of the arc-shaped adsorption plate at the positive electrode. A synchronous belt conveyor 4 driven by a stepper motor is installed on the support base. The speed is adjustable to accommodate different paper sizes. The guide plate 5 is made of stainless steel guide paper (coated with Teflon for low friction) to ensure smooth paper transport without electrostatic interference. The cantilever 6 is made of aluminum alloy and fixed to the top wall of the outer casing 1. A CVM-15KV high-voltage generator 8 is installed laterally on the support frame 7 to power the tungsten needle electrode array 10. The tungsten needle electrode array 10 consists of tungsten needles with a diameter of 0.5mm, spaced at 10m... The particles are arranged in a matrix with spacing m. The high-voltage generator 8 applies high voltage to excite corona discharge, which ionizes the surrounding air and generates a large number of electrons and negative ions. The electrons collide with the dust on the paper surface (such as paper fibers and toner), causing the dust to be negatively charged. The cantilever 11 is also made of aluminum alloy and is connected to the support frame 12 at the end. The positive pressure source 13 adopts an ITV0030-3BL type electric proportional valve to output positive pressure. The arc-shaped curved adsorption plate 14 is made of stainless steel (surface anodized treatment) and forms a 30° angle with the paper transport direction to increase the adsorption area. It is connected to a positive high voltage to form an electric field. The negatively charged dust migrates to the plate under the action of the electric field force and is adsorbed on the surface.

[0017] Please see Figure 1 and Figure 3A further solution based on this embodiment is as follows: The dust removal unit includes a first support plate 15 and a second support plate 16 fixedly mounted on the upper surface of the outer shell 1 of the conveyor 4. A bearing seat 17 is provided on the surface of the first support plate 15, and a servo motor 18 is mounted on the surface of the second support plate 16. A cleaning roller 19 is rotatably connected inside the bearing seat 17. One end of the cleaning roller 19 is fixedly connected to the output shaft of the servo motor 18, which drives the cleaning roller 19 to rotate. Nylon whiskers are provided on the outer wall of the cleaning roller 19. A dust collection box 20 is detachably connected between the first support plate 15 and the second support plate 16. A cleaning scraper 21 that contacts the surface of the cleaning roller 19 is provided on the dust collection box 20. Dust slides down into the dust collection box 20 through the cleaning scraper 21. Both the first support plate 15 and the second support plate 16 are made of aluminum alloy and are fixedly mounted on the upper surface of the outer shell 1 of the conveyor 4. The first support plate 15 provides a bearing seat. At mounting position 17, support plate 2 16 fixes servo motor 18, forming a support and drive frame for cleaning roller 19. Cleaning roller 19 has a stainless steel shaft (hard chrome plated on the surface), and nylon tendrils are 0.2mm diameter PA66 fibers, spirally wound on the surface of the roller body. Servo motor 18 (A5 series MSMD042G1U) is connected to cleaning roller 19. Servo motor 18 drives cleaning roller 19 to rotate. Nylon tendrils contact the paper surface and capture residual small-diameter dust particles through van der Waals force + mechanical hooking action. In addition, the elastic deformation of nylon tendrils adapts to the slight protrusions on the paper surface to avoid scratches. Dust collection box 20 is made of ABS plastic, and cleaning scraper 21 is made of polytetrafluoroethylene (PTFE) material, which contacts the surface of cleaning roller 19 and is used to scrape off the dust adsorbed by nylon tendrils. The dust slides down the inclined surface of the scraper into dust collection box 20.

[0018] Please see Figure 1 and Figure 4 A further embodiment of this solution is as follows: The dust collection unit includes a surrounding plate 22 fixed to the upper surface of the outer casing 1 of the conveyor 4. An electric push rod 23 is provided on the upper surface of the surrounding plate 22. A connecting rod 24 is installed on the air outlet side of the electric push rod 23. A top plate 25 is fixed to the end of the connecting rod 24. A dust collection pipe 26 is provided on the surface of the top plate 25 through a retaining ring. A dust collection hood 27 is provided at the air intake of the dust collection pipe 26. A flexible hose 28 is connected to the air outlet of the dust collection pipe 26. A dust collection fan is also provided on the upper surface of the surrounding plate 22. 29. The air outlet side of the vacuum fan 29 is connected to one end of the hose 28 through a filter mechanism. The enclosure 22 is made of cold-rolled steel plate (with powder coating), and is fixed to the upper end face of the outer shell 1 of the conveyor 4 to form a vacuum unit mounting base. The electric push rod 23 is of type LA36, which drives the top plate 25 to rise and fall vertically and adjusts the height of the vacuum pipe 26 to adapt to different paper thicknesses. The vacuum pipe 26 is a PVC hose 28 (with smooth inner wall). The dust collection hood 27 focuses the airflow to improve the suction efficiency and ensure that the dust is completely sucked in. Please see Figure 4 and Figure 5A further solution based on this embodiment is as follows: The filtration mechanism includes a filter box 30 disposed on the upper surface of the enclosure 22. At least two sets of filter plates 31 are slidably connected inside the filter box 30. A filter membrane 32 is disposed on the filter plate 31. A convex rail 33 is integrally fixed to the side wall of the filter plate 31. A sliding groove 34 is opened on the inner wall of the filter box 30. The convex rail 33 is slidably connected to the sliding groove 34. The filter box 30 is made of ABS material and has two sets of sliding filter plates 31 inside. The filter membrane 32 is a PTFE microporous membrane with high filtration efficiency, which avoids dust from entering the dust collection fan 29. Please see Figure 3 and Figure 6 A further solution based on this embodiment is as follows: the side wall of the dust collection box 20 is integrally fixed with a convex rail 35, and the inner walls of the support plate 15 and the support plate 26 are both provided with a sliding groove 36. The convex rail 35 and the sliding groove 36 are slidably connected. Through the sliding cooperation between the convex rail 35 and the sliding groove 36, the dust collection box 20 is very convenient to replace and clean, saving time.

[0019] Please see Figure 5 A further solution based on this embodiment is: a magnet is provided on the contact surface of the convex rail 33 and the slide groove 34, and the convex rail 33 and the slide groove 34 are magnetically connected. The convex rail 33 and the slide groove 34 are magnetically connected, which overcomes the problem of easy wear of traditional buckle structure. The filter plate 31 can be pulled out and replaced by one hand.

[0020] Please see Figure 6 A further solution based on this embodiment is as follows: magnets are also provided on the contact surfaces of the second convex rail 35 and the second slide groove 36. The second convex rail 35 and the second slide groove 36 are magnetically connected. The magnetic connection replaces the traditional bolt fixing. When the dust collection box 20 is pushed in, it is automatically adsorbed and positioned. When it is pulled out, it can be separated by overcoming the magnetic attraction.

[0021] In another embodiment based on the tungsten needle electrode array 10, other structures in the prior art can also be used, such as a carbon nanotube bundle electrode array, to replace the original tungsten needle electrode array 10. This array consists of carbon nanotube bundles arranged in a honeycomb pattern and connected to the high-voltage generator 8 through a graphene conductive layer. The advantages are that the tip discharge effect of carbon nanotubes is stronger, the corona discharge efficiency is improved, the dust charging effect is more significant, the honeycomb arrangement expands the electric field coverage area, and wider paper can be processed. The oxidation resistance of carbon nanotubes is better than that of tungsten needles, the lifespan is extended, and the need for high-frequency maintenance is reduced.

[0022] Based on another embodiment of the filtration mechanism, other structures in the prior art can also be used, such as a rotary filter cartridge, to replace the original sliding filter plate 31. The rotary filter cartridge includes a stainless steel filter cartridge, a drive motor and a pulse backflushing structure. The surface of the filter cartridge is covered with a PTFE film. It is driven to rotate by the motor, and the pulse airflow periodically cleans the surface of the filter cartridge. The advantage is that the 360° filtration area of ​​the filter cartridge is several times that of the original flat plate structure, and the pulse backflushing structure achieves self-cleaning without disassembly.

[0023] Working principle: The device is installed on the inner wall of the self-service printer, with its two ends connected to the printing area and the paper output area of ​​the self-service printer, respectively. After the paper enters the electrostatic dust removal area, it is fixed on the support frame 7 at the end of the aluminum alloy cantilever 6 on the top wall of the outer shell 1. The installed tungsten needle electrode array 10 starts to work. The high voltage generator 8 applies high voltage to stimulate corona discharge, which ionizes the surrounding air and generates a large number of electrons and negative ions. These electrons collide with the dust (such as paper fibers and toner) on the paper surface, causing the dust to be charged with negative charge. At the same time, the arc-shaped adsorption plate 14 set inside the support frame 12 at the end of the aluminum alloy cantilever 11 on the top wall of the outer shell 1 forms an electric field. The negatively charged dust migrates to the arc-shaped adsorption plate under the action of the electric field force and is adsorbed on its surface. After electrostatic dust removal, the paper continues to be conveyed and enters the micro-dust removal unit area. The cleaning roller 19, which is fixed between the aluminum alloy support plate 15 and support plate 2 16 on the upper end face of the outer shell 1 of the conveyor 4, rotates under the drive of the servo motor 18. The nylon tentacles contact the paper surface and capture residual small-diameter dust particles through the action of "van der Waals force + mechanical hook". The elastic deformation of the nylon tentacles can adapt to the micro-protrusions on the paper surface and avoid scratching the paper. The cleaning scraper 21 set on the dust collection box 20, which is detachably connected between support plate 15 and support plate 2 16, contacts the surface of the cleaning roller 19 and scrapes off the dust adsorbed by the nylon tentacles. The dust slides down the inclined surface of the scraper into the dust collection box 20. After the dust removal process, the paper continues forward to the end of the conveyor path. At this point, the electric push rod 23, fixed to the cold-rolled steel plate enclosure 22 on the upper surface of the conveyor 4 housing 1, drives the top plate 25 to rise and fall vertically. This adjusts the height of the PVC flexible hose 28 (smooth inner wall) and the suction pipe 26, which is set on the surface of the top plate 25 via a retaining ring, to accommodate different paper thicknesses. The dust collection hood 27 at the suction port of the suction pipe 26 focuses the airflow to improve suction efficiency. Simultaneously, the dust collection fan 29 on the upper surface of the enclosure 22 operates, connecting to the air outlet of the suction pipe 26 through a filter mechanism. The flexible hose 28 sucks in the free dust particles that have detached from the paper. In the filtration mechanism, at least two sets of filter plates 31 (each filter plate 31 is provided with a PTFE microporous membrane filter 32) are slidably connected in the filter box 30 located on the upper surface of the enclosure plate 22 to filter the sucked-in gas and prevent dust from entering the vacuum fan 29. The convex rail 33 integrally fixed to the side wall of the filter plate 31 is magnetically connected to the sliding groove 34 opened in the inner wall of the filter box 30 (the contact surface between the convex rail 33 and the sliding groove 34 is provided with a magnet). The filter plate 31 can be pulled out and replaced with one hand. During the vacuuming process, the dust collection box 20 collects the dust scraped off from the cleaning roller 19. The convex rail 25 integrally fixed to the side wall of the dust collection box 20 is connected to the slide groove 26 opened on the inner wall of the support plate 15 and the support plate 26 by magnetic attraction (the contact surface between the convex rail 25 and the slide groove 26 is also provided with magnets). When the dust collection box 20 is pushed in, it automatically adsorbs and positions itself. When it is pulled out, it can be separated by overcoming the magnetic attraction, which is convenient for replacement and cleaning. After a series of dust removal treatments, the paper is output from the paper outlet 2 and enters the printing area of ​​the self-service printer.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-service printing device with electrostatic dust removal function, characterized in that: The device includes an outer casing (1), with a paper output port (2) connected to the printing area of ​​the self-service printer and a paper input port (3) connected to the paper output area of ​​the self-service printer at both ends. Inside the outer casing (1), along the paper transport path from the paper input port (3) to the paper output port (2), there are an electrostatic dust removal unit, a micro-dust removal unit, and a dust collection unit arranged in sequence. A conveyor (4) is installed on the bearing base inside the outer casing (1). Paper guide plates (5) are provided at the connection between the conveyor (4) and the paper input port (3) and the paper output port (2). The electrostatic dust removal unit includes a cantilever (6) fixed to the top wall of the outer casing (1). A support frame is fixed to the end of the cantilever (6). A high-voltage generator (8) is installed on the side of the support frame (7), and a support frame (9) is installed inside the support frame (7). The high-voltage generator (8) is electrically connected to the tungsten needle electrode array (10) installed on the bottom surface of the support frame (9). A cantilever (11) is also fixed to the top wall of the outer shell (1), and a support frame (12) is fixed to its end. A positive pressure source (13) is installed on the side wall of the support frame (12). The positive pressure source (13) is electrically connected to the arc-shaped curved surface adsorption plate (14) set inside the support frame (12). The micro-dust removal unit is used to peel off the residual particles, and the dust collection unit is set at the end of the transmission path to collect the free dust particles that have detached from the paper surface.

2. The self-service printing device with electrostatic dust removal function according to claim 1, characterized in that: The dust removal unit includes a support plate 1 (15) and a support plate 2 (16) fixedly mounted on the upper surface of the outer shell (1) of the conveyor (4). The surface of the support plate 1 (15) is provided with a bearing seat (17), and the surface of the support plate 2 (16) is equipped with a servo motor (18). A cleaning roller (19) is rotatably connected inside the bearing seat (17). One end of the cleaning roller (19) is fixedly connected to the output shaft of the servo motor (18). The servo motor (18) is used to drive the cleaning roller (19) to rotate. Nylon whiskers are provided on the outer wall of the cleaning roller (19). A dust collection box (20) is detachably connected between the support plate 1 (15) and the support plate 2 (16). A cleaning scraper (21) is provided on the dust collection box (20) to contact the surface of the cleaning roller (19). Dust slides down into the dust collection box (20) through the cleaning scraper (21).

3. The self-service printing device with electrostatic dust removal function according to claim 1, characterized in that: The dust collection unit includes a partition plate (22) fixed to the upper surface of the outer shell (1) of the conveyor (4). An electric push rod (23) is provided on the upper surface of the partition plate (22). A connecting rod (24) is installed on the air outlet side of the electric push rod (23). A top plate (25) is fixed to the end of the connecting rod (24). A dust collection pipe (26) is provided on the surface of the top plate (25) through a retaining ring. A dust collection hood (27) is provided at the air inlet of the dust collection pipe (26). A hose (28) is connected to the air outlet of the dust collection pipe (26). A dust collection fan (29) is also provided on the upper surface of the partition plate (22). The air outlet side of the dust collection fan (29) is connected to one end of the hose (28) through a filter mechanism.

4. A self-service printing device with electrostatic dust removal function according to claim 3, characterized in that: The filtration mechanism includes a filter box (30) disposed on the upper surface of the enclosure (22). At least two sets of filter plates (31) are slidably connected inside the filter box (30). A filter membrane (32) is disposed on the filter plate (31). A convex rail (33) is integrally fixed to the side wall of the filter plate (31). A sliding groove (34) is opened on the inner wall of the filter box (30). The convex rail (33) and the sliding groove (34) are slidably connected.

5. A self-service printing device with electrostatic dust removal function according to claim 2, characterized in that: The side wall of the dust collection box (20) is integrally fixed with a convex rail (35), and the inner walls of the support plate (15) and the support plate (16) are provided with a sliding groove (36), and the convex rail (35) and the sliding groove (36) are slidably connected.

6. A self-service printing device with electrostatic dust removal function according to claim 4, characterized in that: Magnets are provided on the contact surfaces of the convex rail (33) and the slide groove (34), and the convex rail (33) and the slide groove (34) are magnetically connected.

7. A self-service printing device with electrostatic dust removal function according to claim 5, characterized in that: Magnets are also provided on the contact surfaces of the second convex rail (35) and the second slide (36), and the second convex rail (35) and the second slide (36) are magnetically connected.

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