A cleaning device for a print head of an inkjet printer

Abstract

The present application belongs to the technical field of ink-jet printer, and particularly relates to a kind of ink-jet printer's print head cleaning device, including open box, flushing component, cleaning fluid scraping component and linear reciprocating drive mechanism;Through linear reciprocating drive mechanism drive open box moves to the below of print head, the inside of elastic air bag is inflated, makes its upper surface rise, and is closely combined with the edge of print head, opens electric control valve one, closes electric control valve two, so that open box inside forms negative pressure, print head sprays cleaning fluid, flushes print head, flushes, closes electric control valve one, gas-liquid mixing pump opens exhaust, then opens electric control valve two, subsequently electromagnetic lock and scraper are separated, the top of scraper passes along the surface of print head, and the cleaning fluid on the surface of print head is scraped, so that the cleaning operation of print head is completed, open box moves below print head, is not susceptible to the influence of narrow space, the whole process does not need manual operation, and the cleaning process is more smooth and fast.

Description

Technical Field

[0001] This invention belongs to the field of inkjet printer technology, specifically relating to a printer head cleaning device for inkjet printers. Background Technology

[0002] Currently, after the design is printed on the packaging paper, a QR code is also printed on the packaging using an inkjet printer to facilitate people's access to product information. For example, when printing QR codes on cigarette labels, before cutting, multiple cigarette labels are still a single sheet, which is conveyed under tension by a roller conveyor and passes under the inkjet head to print the QR code.

[0003] During the inkjet printing and proofing process, the appearance of QR codes is often affected by contamination at the nozzle of the printhead, resulting in continuous white lines that appear intermittently, leading to substandard QR code quality. Adjusting the encoder parameters of the inkjet printer (printhead voltage, pulse width waveform, and spray frequency, etc.) cannot solve the problem. The only solution is to stop the equipment and manually clean the printhead.

[0004] When printing QR codes on cigarette labels, the inkjet printing equipment typically has multiple printheads positioned horizontally above a roller conveyor. Because the height difference between the printheads and the rollers is only millimeters, and the printheads are located between two rollers, coupled with the limited space provided by the roller mounting brackets, the working space for workers to clean the printheads is cramped. This is especially true for printheads located in the middle, which are difficult to clean and require a significant amount of time, thus impacting production efficiency. Furthermore, after cleaning the printheads, the first few QR codes printed upon restarting the machine are often damaged or substandard, and these cigarette labels are scrapped, resulting in further waste. Summary of the Invention

[0005] This invention provides a printhead cleaning device for an inkjet printer, which solves the problem that existing inkjet printers are difficult to operate due to limited operating space when cleaning the printhead.

[0006] To achieve the above objectives, the present invention provides a printer head cleaning device for an inkjet printer, comprising:

[0007] An open box body, the top of which is provided with an elastic airbag around the perimeter, the elastic airbag being connected to a conduit, the other end of which is connected to an air pressure regulating component for controlling the height of the elastic airbag;

[0008] The rinsing assembly includes a nozzle disposed in an open box, a second conduit connected to the nozzle, a water pump connected to the end of the second conduit, and a gas-liquid mixing pump. The gas-liquid mixing pump is connected to the bottom of the open box via a third conduit, and an electrically controlled valve is provided on the third conduit.

[0009] A cleaning fluid scraping assembly includes a scraper slidably disposed within an open box, a rope fixedly connected to the end of the scraper, a piston fixedly connected to the rope, a cylinder connected to a conduit, and an electromagnetic lock. The piston is slidably disposed within the cylinder, and the cylinder is equipped with an electrically controlled valve. The scraper penetrates the side wall of the open box, and the electromagnetic lock can be embedded in the bottom of the scraper to fix it in place.

[0010] A linear reciprocating drive mechanism is mounted on a support for mounting rollers and is connected to the open box body for driving the open box body to reciprocate at the bottom of the print head.

[0011] Optionally, it also includes a pre-coding mechanism, which includes a fixed winding execution mechanism, a long strip wound on the winding execution mechanism, and a guide roller that rotates on a fixed axis. One end of the long strip is connected to the side of the open box, and the guide roller abuts against the bottom of the long strip.

[0012] Optionally, the winding actuator includes a motor and a winch connected to the motor drive, with the long strip wound on the winch.

[0013] Optionally, a fastener is connected to the end of the long strip away from the winding actuator, and the fastener is rigidly connected to the side wall of the open box.

[0014] Optionally, the fastener has an L-shaped cross-section, and the end of the long strip is connected to the top of the fastener.

[0015] Optionally, the air pressure regulating assembly includes an air pump, and the air pump is equipped with an air pressure regulating valve.

[0016] Optionally, the linear reciprocating drive mechanism includes two crossbeams rigidly connected to the bracket, a second slide rail disposed on the crossbeams, and a fixedly disposed linear reciprocating driver. The open box body is slidably connected to the second slide rail, and the output end of the linear reciprocating driver is rigidly connected to the open box body.

[0017] Optionally, a mounting bracket is fixedly connected to the open box body, and the gas-liquid mixing pump is rigidly connected to the mounting bracket.

[0018] Optionally, the scraper includes a rigid plate one, a rigid plate two fixedly connected to one side of the rigid plate one, several vertical plates disposed on the top of the rigid plate one, flexible strips disposed on the vertical plates, and a long strip fixedly disposed on the top of the rigid plate two. A connecting cylinder is fixedly disposed on the inner wall of the open box body. The rigid plate two is slidably disposed in the connecting cylinder and its end extends to the outside of the open box body. The long strip slides in cooperation with the inner wall of the connecting cylinder.

[0019] Optionally, the electromagnetic lock includes an electromagnet rigidly connected to the open box body, a connecting rod movably disposed within the electromagnet body, a spring sleeved on the connecting rod, and a locking tongue connected to the end of the connecting rod. The bottom of the scraper is provided with a groove, and the locking tongue cooperates with the groove.

[0020] Optionally, both the first and second conduits are flexible tubes.

[0021] The beneficial effects of this invention are as follows: The inkjet head cleaning device for inkjet printers provided by this invention can drive the open box to move under any inkjet head via a linear reciprocating drive mechanism. At this time, the air pressure regulating component and the conduit are activated to inflate the elastic air bladder, raising the upper surface of the elastic air bladder so that it can fit tightly against the edge of the inkjet head. The gas-liquid mixing pump is activated to extract air, while simultaneously opening the first electronic control valve and closing the second electronic control valve, creating a negative pressure inside the open box. Then, the water pump is activated to extract cleaning fluid, which is sprayed out through the printhead to rinse the inkjet head of the inkjet printer. After rinsing is complete, the first electronic control valve is closed, the gas-liquid mixing pump is opened to exhaust air, and then the second electronic control valve is opened again. Subsequently... The electromagnetic lock disengages from the scraper. At this point, the scraper accelerates to a certain speed under negative pressure, causing its top to scrape across the surface of the printhead, removing the cleaning fluid. Afterward, the air pressure regulating component stops working, the open container disengages from the printhead, and the gas-liquid mixing pump is activated to draw air, which drives the piston back to its original position, and consequently, the scraper. A linear reciprocating drive mechanism moves the open container under the next printhead, and the above operation is repeated, thus completing the printhead cleaning process. The open container moves under the printhead, making it less susceptible to confined spaces, and the entire process requires no manual intervention, resulting in a smoother and faster cleaning process. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the printhead cleaning device provided in an embodiment of the present invention;

[0023] Figure 2 for Figure 1 Enlarged view of area A in the image;

[0024] Figure 3 This is a partial structural side view of the printhead cleaning device provided in an embodiment of the present invention;

[0025] Figure 4 for Figure 3 Enlarged view of area B in the image;

[0026] Figure 5 This is a top view of the printhead cleaning device provided in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the scraper structure provided in an embodiment of the present invention;

[0028] Figure 7 A cross-sectional view of the elastic airbag provided in an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the coding principle of an inkjet printer.

[0030] In the diagram: 10. Open box body; 11. Elastic airbag; 12. Conduit 1; 13. Air pressure regulating component; 14. Slide rail 1; 15. Connecting cylinder; 21. Nozzle; 22. Conduit 2; 23. Water pump; 24. Gas-liquid mixing pump; 25. Conduit 3; 26. Electrically controlled valve 1; 27. Mounting bracket; 31. Scraper; 311. Rigid plate 1; 312. Rigid plate 2; 313. Vertical plate; 314. Flexible strip; 315. Long strip plate; 316. Groove; 32. Rope; 33. Piston; 34. Cylinder; 35. Electrically controlled valve 2 36. Electromagnetic lock; 361. Electromagnet; 362. Linkage rod; 363. Spring; 364. Locking tongue; 37. Fixed pulley; 40. Linear reciprocating drive mechanism; 41. Crossbeam; 42. Slide rail II; 43. Linear reciprocating driver; 50. Pre-printing mechanism; 51. Motor; 52. Winch; 53. Long strip; 54. Guide roller; 55. Support; 56. Fixing component; 60. Bracket; 1. Nozzle panel; 2. Ceramic panel; 3. Ink chamber; 4. Piezoelectric ceramic; 5. Electrode; 6. Vibration diaphragm; 7. Drive power supply. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0032] like Figure 1-6As shown, the present invention provides a printer head cleaning device for an inkjet printer, comprising: an open box body 10, a rinsing assembly, a cleaning fluid scraping assembly, and a linear reciprocating drive mechanism 40. The top of the open box body 10 is provided with an elastic airbag 11 surrounding the perimeter. The elastic airbag 11 is connected to a first conduit 12, and the other end of the first conduit 12 is connected to an air pressure regulating assembly 13 for controlling the height of the elastic airbag 11. The rinsing assembly includes a printhead 21 disposed within the open box body 10, a second conduit 22 connected to the printhead 21, a water pump 23 connected to the end of the second conduit 22, and a gas-liquid mixing pump 24. The gas-liquid mixing pump 24 is connected to the bottom of the open box body 10 via a third conduit 25. The tube 3 25 is equipped with an electrically controlled valve 26; the cleaning fluid scraping assembly includes a scraper 31 slidably disposed in the open box 10, a rope 32 fixedly connected to the end of the scraper 31, a piston 33 fixedly connected to the rope 32, a cylinder 34 connected to the tube 3 25, and an electromagnetic lock 36. The piston 33 is slidably disposed in the cylinder 34, and the cylinder 34 is equipped with an electrically controlled valve 35. The scraper 31 penetrates the side wall of the open box 10, and the electromagnetic lock 36 can be embedded in the bottom of the scraper 31 to fix the scraper 31; the linear reciprocating drive mechanism 40 is disposed on the bracket 60 for mounting the roller and is drivenly connected to the open box 10 to drive the open box 10 to reciprocate at the bottom of the print head.

[0033] Compared with the prior art, the inkjet head cleaning device for the inkjet printer provided in this embodiment of the invention can drive the open box 10 to move under any inkjet head via the linear reciprocating drive mechanism 40. At this time, the air pressure regulating component 13 and the first conduit 12 are activated to inflate the elastic air bag 11, raising the upper surface of the elastic air bag 11 so that it can fit tightly against the edge of the inkjet head. The gas-liquid mixing pump 24 is activated to extract air, and at the same time, the first electronic control valve 26 is opened and the second electronic control valve 35 is closed, so that a negative pressure is formed inside the open box 10. Then, the water pump 23 is activated to extract cleaning fluid, which is sprayed out through the printhead 21 to rinse the inkjet printer head. After rinsing is completed, the first electronic control valve 26 is closed, the gas-liquid mixing pump 24 is opened to exhaust air, and the second electronic control valve 35 is opened again. 5. Subsequently, the electromagnetic lock 36 disengages from the scraper 31. At this time, the scraper 31 accelerates to a certain speed under the action of negative pressure, causing the top of the scraper 31 to slide across the surface of the printhead, scraping off the cleaning fluid on the surface of the printhead. After that, the air pressure regulating component 13 stops working, the open box 10 disengages from the printhead, and the gas-liquid mixing pump 24 is started to draw air, which can drive the piston 33 to return to its position, and then drive the scraper 31 to return to its position. The open box 10 can be moved to the bottom of the next printhead through the linear reciprocating drive mechanism 40. The above operation can be repeated to complete the cleaning operation of the printhead. The open box 10 moves under the printhead and is not easily affected by narrow space. The whole process does not require manual operation, and the cleaning process is smoother and faster.

[0034] In addition, the cleaning fluid sprayed from the nozzle 21 can be quickly extracted into the open box 10 by the gas-liquid mixing pump 24, which can prevent the cleaning fluid from accumulating in the open box 10 and having an excessive impact on the negative pressure value in the system, causing the cleaning fluid to splash out, thereby avoiding potential damage to the equipment. At the same time, it can also reduce the subsequent cleaning work.

[0035] It should be noted that you should refer to [link / reference]. Figure 8 The printer uses piezoelectric inkjet printing technology. The printhead consists of a nozzle panel 1, a ceramic panel 2, an ink chamber 3, a piezoelectric ceramic 4, an electrode 5, a vibrating diaphragm 6, and a driving power supply 7. The piezoelectric ceramic 4 is energized and deformed to compress the ink chamber 3 and eject ink. Except for the ink outlet, the surface of the printhead is relatively flat, which is conducive to the adhesion of the elastic airbag 11.

[0036] In this embodiment, under natural conditions, the height difference between the top of the elastic airbag 11 and the printhead 21 does not exceed 3mm, preferably not more than 1mm, so as to ensure that the elastic airbag 11 and the printhead have sufficient fit.

[0037] To avoid friction between the rope 32 and the open box 10, which would reduce its service life and increase the resistance of the scraper 31, two fixed pulleys 37 are also provided on the open box 10, and the rope 32 passes over the two fixed pulleys 37.

[0038] Specifically, please refer to Figure 7 The elastic airbag 11 is made of rubber, latex or silicone and has a hollow structure. It extends around the top of the open box 10. The elastic airbag 11 is glued or heat-bonded to the open box 10. The bottom of the elastic airbag 11 is provided with a through hole and the open box 10 is provided with a corresponding through hole for connecting the conduit 12.

[0039] In this embodiment, the printhead cleaning device further includes a pre-printing code mechanism 50. The pre-printing code mechanism 50 includes a fixedly mounted winding execution mechanism, a long strip 53 wound on the winding execution mechanism, and a guide roller 54 rotatably mounted on a fixed axis. One end of the long strip 53 is connected to the side of the open box 10, and the guide roller 54 abuts against the bottom of the long strip 53.

[0040] Specifically, the pre-printing mechanism 50 is fixedly installed on the outside of the bracket 60, the guide roller 54 is fixedly mounted on the support 55, the support 55 is mounted on the bracket 60, preferably on the top of the bracket 60, the long strip 53 is pulled out and attached to the guide roller 54, the end of the long strip 53 is fixed to the side of the open box 10 and close to the top, wherein the height difference between the long strip 53 and the top of the elastic airbag 11 does not exceed 0.5mm, preferably, the long strip 53 and the top of the elastic airbag 11 are flush. With this setup, after the printhead is cleaned, the open box 10 moves to the end away from the winding actuator under the action of the linear reciprocating drive mechanism 40, keeping the long strip 53 taut throughout the process. The printhead can pause during this process to print the first few QR codes onto the long strip 53. The quality of the QR codes printed on the long strip 53 can be observed before proceeding to the next step. This is equivalent to preheating the printing equipment, ensuring that the QR codes printed on the packaging paper are directly qualified, thus reducing waste of packaging materials (cigarette labels). Furthermore, after the long strip 53 is wound up, it can be removed, cleaned, and reused to remove the QR codes.

[0041] In this embodiment, the long strip 53 is a thin steel strip or plastic strip with good flexibility and a thickness of no more than 1 mm.

[0042] In one embodiment, the winding actuator includes a motor 51 and a winch 52 driven by the motor 51, with a long strip 53 wound around the winch 52. Specifically, the motor 51 is fixedly mounted on the bracket 60. When the long strip 53 is pulled out, the motor 51 rotates, which, in conjunction with the linear reciprocating drive mechanism 40, can tighten the long strip 53. The motor 51 reverses and maintains a certain tension to wind the long strip 53 back to the winch 52.

[0043] In this embodiment, a fastener 56 is connected to the end of the long strip 53 away from the winding actuator, and the fastener 56 is rigidly connected to the side wall of the open box 10. Specifically, the fastener 56 can be fixed to the side wall of the open box 10 with screws, which facilitates quick disassembly of the long strip 53 and makes cleaning of the long strip 53 convenient; of course, the fastener 56 can also be welded to the side wall of the open box 10, and the long strip 53 is fixed to the fastener 56 with screws.

[0044] Further, please refer to Figure 4 The fastener 56 has an L-shaped cross-section, and the end of the long strip 53 is connected to the top of the fastener 56.

[0045] Specifically, the fastener 56 is made of steel and has high rigidity. One side of the fastener 56 is welded and fixed to the open box body 10. The long strip 53 is bent at a right angle and passes around the upper end of the fastener 56, and is fixed to the fastener 56 on the other side by screws.

[0046] In this embodiment, the air pressure regulating component 13 includes an air pump, which is equipped with an air pressure regulating valve. Specifically, when the elastic airbag 11 is inflated to a certain pressure, the air pressure inside the elastic airbag 11 can be controlled by the air pressure regulating valve to make the air pressure relatively stable, and the air can be vented to detach the elastic airbag 11 from the print head.

[0047] In this embodiment, the linear reciprocating drive mechanism 40 includes two crossbeams 41 rigidly connected to the bracket 60, a second slide rail 42 disposed on the crossbeams 41, and a fixedly disposed linear reciprocating driver 43. The open box 10 is slidably connected to the second slide rail 42, and the output end of the linear reciprocating driver 43 is rigidly connected to the open box 10.

[0048] Specifically, two crossbeams 41 are located slightly below the two rollers of the roller conveyor, with a certain distance between them. Both ends of the crossbeams 41 are fixedly connected to the support 60. A linear reciprocating drive 43 is fixedly connected to the support 60. Driven by the linear reciprocating drive 43, the open box 10 moves along the slide rail 42 to the designated position. The linear reciprocating drive 43 is an electric cylinder, a pneumatic cylinder, or a hydraulic cylinder.

[0049] In this embodiment, a mounting bracket 27 is fixedly connected to the open box body 10, and the gas-liquid mixing pump 24 is rigidly connected to the mounting bracket 27. This ensures that the gas-liquid mixing pump 24 moves synchronously, allowing the conduit 35 and the cylinder 34 to be made of materials with greater rigidity, such as steel, which can ensure the stability of the negative pressure in the system and sufficient strength, as well as the smoother movement of the piston 33.

[0050] In this embodiment, please refer to Figure 6 The scraper 31 includes a rigid plate 311, a rigid plate 312 fixedly connected to one side of the rigid plate 311, a plurality of upright plates 313 disposed on the top of the rigid plate 311, a flexible strip 314 disposed on the upright plate 313, and a long strip 315 fixedly disposed on the top of the rigid plate 312. A connecting cylinder 15 is fixedly disposed on the inner wall of the open box 10. The rigid plate 312 is slidably disposed in the connecting cylinder 15 and its end extends to the outside of the open box 10. The long strip 315 is slidably engaged with the inner wall of the connecting cylinder 15.

[0051] Specifically, two parallel slide rails 42 are fixedly installed on the inner side wall of the open box 10. The rigid plate 311 is slidably connected to the slide rails 42. After the print head is rinsed, the open box 10 is under negative pressure. The electromagnetic lock 36 is energized and disengages from the rigid plate 312. Under the action of the pressure difference between the inside and outside, the side wall of the long strip 315 serves as the pressure surface and slides rapidly in the connecting cylinder 15 until it is disengaged. Then, the scraper 31 moves along the slide rail 14 at a certain speed, thereby scraping off the cleaning fluid on the surface of the print head through the flexible strip 314.

[0052] In this embodiment, the electromagnetic lock 36 includes an electromagnet 361 rigidly connected to the open box body 10, a connecting rod 362 movably disposed within the electromagnet 361, a spring 363 sleeved on the connecting rod 362, and a locking tongue 364 connected to the end of the connecting rod 362. The bottom of the scraper 31 is provided with a groove 316, and the locking tongue 364 cooperates with the groove 316.

[0053] Specifically, when the electromagnet 361 is energized, it attracts the connecting rod 362, causing the locking tongue 364 to move downwards, compressing the spring 363 and gradually disengaging from the groove 316, thus engaging the fixing action on the scraper 31. When the scraper 31 is pulled back, the locking tongue 364 aligns with the groove 316. When the electromagnet 361 is not energized, the spring 363 pushes the locking tongue 364 into the groove 316 to fix the scraper 31. Furthermore, one side of the locking tongue 364 is an arc surface, which facilitates the smoother insertion of the locking tongue 364 into the groove 316.

[0054] In this embodiment, both conduit 12 and conduit 22 are flexible tubes with a certain degree of rigidity and toughness.

[0055] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0056] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A cleaning device for a print head of an inkjet printer, characterized in that The utility model relates to a kind of inkjet head cleaning device, including: Open box (10), the top of the open box (10) is provided with elastic air bag (11) around a week, the elastic air bag (11) is communicated with pipe one (12), the other end of pipe one (12) is connected with air pressure regulating assembly (13), for controlling the height of elastic air bag (11); Rinse assembly, the rinse assembly includes the spray head (21) being arranged in open box (10), the pipe two (22) being connected with spray head (21), the water pump (23) being connected with the end of pipe two (22), the pipe three being connected with the bottom of open box (10), the gas-liquid mixing pump (24) being connected with the end of pipe three (25), the electric control valve one (26) being arranged on pipe three (25); Cleaning fluid scraping assembly, the cleaning fluid scraping assembly includes the scraper (31) being slidably arranged in open box (10), the rope (32) being fixedly connected to the end of scraper (31), the piston (33) being fixedly connected with rope (32), the cylinder (34) being connected with pipe three (25) and electromagnetic lock (36), the piston (33) is slidably arranged in cylinder (34), the cylinder (34) is provided with electric control valve two (35), the scraper (31) penetrates the side wall of open box (10), and the electromagnetic lock (36) can be embedded in the bottom of scraper (31) for fixing scraper (31);And Linear reciprocating drive mechanism (40), the linear reciprocating drive mechanism (40) is arranged on the bracket (60) of mounting roller and is drivenly connected with open box (10), for driving open box (10) to reciprocate at the bottom of print head; The print head cleaning device further includes pre-spraying code mechanism (50), the pre-spraying code mechanism (50) includes fixedly arranged winding execution mechanism, long strip (53) wound on winding execution mechanism and fixed shaft rotationally arranged guide roller (54), one end of long strip (53) is connected to the side of open box (10), and guide roller (54) abuts on the bottom of long strip (53).

2. The cleaning device for a print head of an inkjet printer according to claim 1, characterized in that The winding execution mechanism includes motor (51), and winch (52) is drivingly connected with motor (51), and long strip (53) is wound on winch (52).

3. The cleaning device for the print head of the inkjet printer according to claim 1, wherein One end of long strip (53) away from winding execution mechanism is connected with fixing part (56), and fixing part (56) is rigidly connected with the side wall of open box (10).

4. The cleaning device for the print head of the inkjet printer according to claim 3, characterized in that, The cross section of fixing part (56) is L-shaped, and the end of long strip (53) is connected to the top of fixing part (56).

5. The cleaning device for the print head of the inkjet printer according to claim 1, wherein The air pressure regulating assembly (13) includes air pump, and the air pump is provided with air pressure regulating valve.

6. The cleaning device for the print head of the inkjet printer according to claim 1, wherein The linear reciprocating drive mechanism (40) includes two cross beams (41) rigidly connected on bracket (60), slide rail two (42) arranged on cross beam (41) and fixedly arranged linear reciprocating drive (43), and open box (10) is slidably connected with slide rail two (42), and the output end of linear reciprocating drive (43) is rigidly connected with open box (10).

7. The cleaning device for the print head of the inkjet printer according to claim 1, wherein The open box body (10) is fixedly connected with a mounting rack (27), and the gas-liquid mixing pump (24) is rigidly connected to the mounting rack (27).

8. The cleaning device for the print head of the inkjet printer according to any one of claims 1 to 7, characterized in that, The scraper (31) comprises a rigid plate one (311), a rigid plate two (312) fixedly connected with one side of the rigid plate one (311), a plurality of vertical plates (313) arranged on the top of the rigid plate one (311), flexible strips (314) arranged on the vertical plates (313), and a long strip plate (315) fixedly arranged on the top of the rigid plate two (312); the inner side wall of the open box body (10) is fixedly provided with a connecting cylinder (15); the rigid plate two (312) is slidingly arranged in the connecting cylinder (15) and extends to the outside of the open box body (10) at the end; and the long strip plate (315) is in sliding fit with the inner wall of the connecting cylinder (15).

9. The cleaning device for the print head of the inkjet printer according to any one of claims 1 to 7, characterized in that, The electromagnetic lock (36) comprises an electromagnet (361) rigidly connected to the open box body (10), a connecting rod (362) movably arranged in the electromagnet (361), a spring (363) sleeved on the connecting rod (362), and a lock tongue (364) connected to the end of the connecting rod (362); the bottom of the scraper (31) is provided with a groove (316); and the lock tongue (364) is matched with the groove (316).

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