An inkjet printhead with convenient replacement

Abstract

The application belongs to the technical field of inkjet printing, and discloses a convenient-to-replace inkjet printing head, which comprises a printer main body and a cleaning frame fixed to the side surface of the printer main body, a nozzle cleaning machine is installed on the side surface of the cleaning frame, an ink carriage box is arranged in the printer main body, a printing head and an ink supply frame are arranged in the ink carriage box. When the printing head is inserted into the ink carriage box for assembly, the inclined block will first extrude and move the one end of the first L-shaped clamping plate outward, and drive the first tension spring to stretch, until the printing head is completely inserted into the bottom of the ink carriage box, then the one end of the first L-shaped clamping plate will be automatically clamped on the first clamping groove, so as to prevent the printing head from moving in the ink carriage box at will, and the stability of the printing head in the ink carriage box is enhanced, when the ink supply frame is inserted into the ink carriage box and assembled with the printing head, the bottom of the positioning plate will first push and move the one end of the second L-shaped clamping plate outward, until the ink supply frame is completely inserted in place.

Description

Technical Field

[0001] This invention belongs to the field of inkjet printing technology, specifically an inkjet printhead that is easy to replace. Background Technology

[0002] Inkjet printers spray colored liquid ink, atomized into tiny particles, onto printing paper through nozzles. Some inkjet printers have three or four printheads to print the four colors: yellow, magenta, cyan, and black; others use a single printhead for each of the four colors. The thermal inkjet technology used in inkjet printers employs a thin-film resistor to heat less than 0.5% of the ink in the ink ejection zone, forming a bubble. This bubble expands extremely rapidly (less than 10 microseconds), forcing ink droplets out of the nozzle. The bubble continues to grow for a few more microseconds before disappearing back onto the resistor. As the bubble disappears, the ink in the nozzle retracts. Then, surface tension creates an attractive force, drawing new ink to replenish the ink ejection zone.

[0003] For example, application CN222004762U discloses an inkjet printer with automatic printhead cleaning, relating to the field of inkjet printing technology. It includes an inkjet printer body, a cleaning chamber fixedly connected to the front of the body, a movable component fixedly connected to the top of the inner cavity of the cleaning chamber, an upper surface of the rear portion of the movable component fixedly connected to the inner cavity of the inkjet printer body, a movable carriage slidably connected to the lower surface of the middle portion of the movable component, a printhead fixedly mounted on the lower surface of the carriage, and a cleaning component fixedly connected to the bottom of the inner cavity of the cleaning chamber, with the left portion of the cleaning component located below the printhead. This inkjet printer with automatic printhead cleaning, through the action of a motor, threaded rod, and cleaning brush, allows the printhead to be cleaned after use. Furthermore, since the cleaning structure, including the cleaning brush, is located within the inner cavity of the cleaning chamber, it facilitates maintenance during use, thereby preventing damage to the internal parts of the inkjet printer body. After prolonged use, piezoelectric inkjet printheads are prone to clogging of their nozzles, and the internal ink channels accumulate a large amount of impurities, hindering normal ink flow. While the aforementioned solutions utilize a motor, threaded rod, and cleaning brush to clean the bottom of the printhead, the cleaning only targets the lower part, failing to thoroughly clean the internal ink channels. Furthermore, current technologies often involve removing the printhead and injecting cleaning fluid using a syringe. This method is inefficient, requires specialized tools for disassembly and reassembly, is complex, and time-consuming, reducing printhead replacement efficiency and increasing operator workload. Therefore, this paper proposes an easily replaceable inkjet printhead to address the problems described in the background technology. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention provides an easily replaceable inkjet printhead, effectively solving the problems of low cleaning efficiency, complex operation steps, and long time consumption caused by using a syringe to inject cleaning fluid into the printhead for cleaning, requiring special tools to disassemble and fix the printhead, or using a cleaning brush to clean the bottom of the printhead.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an easily replaceable inkjet printhead, comprising a printer body and a cleaning frame fixed to the side of the printer body, wherein a printhead cleaning machine is mounted on the side of the cleaning frame, an ink carriage is disposed inside the printer body, a printhead and an ink supply frame are disposed inside the ink carriage, an ink supply box is disposed inside the ink supply frame, and the ink outlet of the ink supply box is connected to the ink inlet of the printhead, a first positioning mechanism for limiting printhead displacement is provided on both the left and right sides of the ink carriage, and a first positioning mechanism for limiting printhead displacement is provided on both the front and rear sides of the ink carriage. The printer body is equipped with a second positioning mechanism to limit the displacement of the ink supply frame. The inner bottom wall of the ink carriage is provided with a first elastic ejector mechanism. A second elastic ejector mechanism is provided between the ink supply frame and the printhead. Two ejector rods are fixed to the inner wall of the cleaning frame. The two ejector rods are used to release the two second positioning mechanisms from fixing the ink supply frame. The top of the printer body is provided with a lifting mechanism for moving the ink supply frame away from the ink carriage. The top of the cleaning frame is provided with a cleaning mechanism for cleaning the printhead, and the cleaning mechanism is connected to the printhead cleaning machine.

[0006] Preferably, the printhead has a first slot and a wedge block fixed at each of its four corners, with the wedge block located below the first slot. The first positioning mechanism includes two first L-shaped plates, one end of each of the two first L-shaped plates sliding through into the ink cartridge and engaging with the corresponding first slot. A pull plate is fixed between the two first L-shaped plates. A first mounting hole is provided on the inner side of each first L-shaped plate, and a first tension spring is fixed to the inner wall of each first mounting hole. The other end of the first tension spring is fixed to the surface of the ink cartridge.

[0007] Preferably, positioning plates are fixedly connected to both the front and rear of the ink supply frame, and a second slot is opened on the surface of both positioning plates. The second positioning mechanism includes a second L-shaped plate. One end of the second L-shaped plate slides through into the ink carriage and is engaged in the corresponding second slot. A second mounting hole is opened on the inner side of the second L-shaped plate. A second tension spring is fixedly connected to the inner wall of the second mounting hole, and the other end of the second tension spring is fixedly connected to the surface of the ink carriage.

[0008] Preferably, the printhead has a second clearance groove on both the front and rear sides, and the diameter of the second clearance groove is larger than the end of the second L-shaped plate that extends into the ink cartridge.

[0009] Preferably, the second L-shaped plate has a trapezoidal groove on its side, and one end of the top rod is adapted to the inclined surface of the inner wall of the trapezoidal groove.

[0010] Preferably, a first positioning hole is provided at each of the four corners of the bottom surface of the printhead. The first elastic ejector mechanism includes four first positioning cylinders. The four first positioning cylinders are respectively fixed to the four corners of the bottom wall of the ink cartridge. A first compression spring is fixed to the inner bottom wall of each first positioning cylinder. An ejector cylinder is fixed to the top of each first compression spring. The ejector cylinder is slidably sleeved on the surface of the first positioning cylinder. The top of each ejector cylinder is slidably inserted into the corresponding first positioning hole.

[0011] Preferably, a second positioning hole is provided at each of the four corners of the upper surface of the print head. The second elastic ejector mechanism includes four positioning rods, which are respectively fixedly connected to the four corners of the bottom surface of the ink supply frame. A second compression spring is fixedly connected to the bottom end of each positioning rod, and a second positioning cylinder is fixedly connected to the bottom end of each second compression spring. The second positioning cylinder is slidably sleeved on the surface of the positioning rod, and the bottom end of each second positioning cylinder is slidably inserted into the corresponding second positioning hole.

[0012] Preferably, the upper surface of the ink supply frame is provided with a mounting bracket, both ends of which are detachably connected to the ink supply frame. An inverted U-shaped plate is fixedly connected to the middle of the mounting bracket. The material lifting mechanism includes a first electric telescopic rod, which is installed at the top inside the printer body. A lifting rod is fixedly connected to the telescopic end of the first electric telescopic rod, and the lifting rod is adapted to the inverted U-shaped plate.

[0013] Preferably, a first clearance groove is provided on the right side of the ink cartridge, and the cleaning mechanism includes a second electric telescopic rod. The second electric telescopic rod is installed on the top inside the cleaning frame. A lifting pipe is fixedly connected to the telescopic end of the second electric telescopic rod. Several flushing pipes are connected to the surface of the lifting pipe, and each flushing pipe corresponds to an ink inlet on the printhead. The top of each flushing pipe is connected to a liquid supply pipe, and the liquid supply pipe passes through the cleaning frame and is connected to the printhead cleaning machine.

[0014] Preferably, the inner bottom wall of the cleaning frame is provided with a liquid collection box, and the top of the liquid collection box is at a level lower than the horizontal plane of the inkjet nozzle of the printhead. The liquid collection box is located directly below the lifting tube, and a drain pipe is connected to the side of the liquid collection box, and the drain pipe extends to the outside of the cleaning frame.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, by setting up a cleaning frame, a printhead cleaning machine, an ink carriage, a printhead, an ink supply frame, an ink supply box, a first positioning mechanism, and a second positioning mechanism, ensures that when the printhead is inserted into the ink carriage for assembly, the inclined block first pushes one end of the first L-shaped clamping plate outward, causing the first tension spring to stretch until the printhead is fully inserted into the bottom of the ink carriage. Then, one end of the first L-shaped clamping plate automatically engages with the first slot, preventing the printhead from moving freely within the ink carriage and enhancing the stability of the printhead within the ink carriage. When the ink supply frame is inserted into the printhead cartridge and assembled with the printhead, the bottom of the positioning plate will first push one end of the second L-shaped clamping plate outward until the ink supply frame is fully inserted. Then, under the elastic force of the second tension spring, the second L-shaped clamping plate will move inward, so that one end of the second L-shaped clamping plate will automatically insert into the second slot, thereby completing the quick assembly and fixation of the ink supply frame. When the two second L-shaped clamping plates are pulled outward, the positioning of the ink supply frame is easily released, which facilitates the quick removal of the ink supply frame from the printhead cartridge.

[0016] This invention, by setting up a first elastic ejector mechanism and a second elastic ejector mechanism, ensures that during the printhead assembly process within the ink cartridge, the ejector cylinder inserts into the corresponding first positioning hole. As the printhead moves downwards, the ejector cylinder compresses the first spring within the first positioning cylinder until the printhead is fixed in the ink cartridge by the first positioning mechanism. This ensures the printhead is securely assembled within the ink cartridge and prevents it from moving arbitrarily. When the first positioning mechanism is released from fixing the printhead, the elastic force of the first spring causes the ejector cylinder to lift the printhead upwards, thus ensuring that the mechanism not only... It can guide the installation of the printhead and facilitate the removal and replacement of the printhead from the printhead cartridge. When the ink supply frame is assembled towards the printhead, the second positioning cylinder will be inserted into the second positioning hole and squeeze the second compression spring until the ink supply frame is fixed in the printhead cartridge by the second positioning mechanism. When the second positioning mechanism releases the fixation of the ink supply frame, the elastic force of the second compression spring will cause the positioning rod to push the ink supply frame upward, so that the second slot is away from one end of the second L-shaped plate. This makes it easier for personnel to remove the ink supply frame from the printhead cartridge, making the operation more flexible and convenient.

[0017] This invention incorporates a cleaning mechanism, a lifting mechanism, and a printhead cleaning machine. When the second L-shaped clamping plate moves close to the top rod, the top rod inserts into the trapezoidal groove. As the ink carriage continues to move, it pushes the second L-shaped clamping plate outward, releasing the ink supply frame from its fixation. Then, the inverted U-shaped plate automatically mounts onto the lifting rod. The movement of the ink carriage stops, and the first electric telescopic rod pulls the ink supply frame out of the ink carriage, detaching it from the ink carriage. The ink carriage then moves to the right again, positioning the lifting tube smoothly in the center of the ink carriage. The second electric telescopic rod is controlled to move the lifting tube downward, aligning the flushing tube with the printhead's ink inlet. The printhead cleaning machine then injects cleaning fluid into the printhead through the supply and flushing tubes for cleaning. The cleaned cleaning fluid flows into the collection box and is finally discharged through the drain pipe. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the cleaning frame of the present invention; Figure 3 This is a schematic diagram of the overall structure of the ink cartridge of the present invention; Figure 4 This is a schematic diagram of the structure of the ink cartridge after the ink supply frame is removed; Figure 5 This is a schematic diagram of the internal structure of the ink cartridge of the present invention; Figure 6 This is a partial cross-sectional view of the ink cartridge of the present invention; Figure 7 This is a top view of the printhead structure of the present invention; Figure 8 This is a schematic diagram of the bottom structure of the printhead of the present invention; Figure 9 This is a schematic diagram of the bottom structure of the ink supply frame of the present invention; Figure 10 This is a schematic diagram showing the connection between the two first L-shaped card plates and the pull plate of the present invention; Figure 11 This is a schematic diagram of the structure of the second L-shaped card plate of the present invention; Figure 12 This is a partial cross-sectional view of the second positioning cylinder of the present invention; Figure 13 This is a schematic diagram showing the connection between the nozzle cleaning machine and the cleaning mechanism of the present invention; Figure 14 This is a schematic diagram of the structure after the top rod of the present invention is inserted into the trapezoidal groove.

[0019] In the diagram: 1. Printer body; 2. Cleaning frame; 3. Printhead cleaner; 4. Ink carriage; 5. Top rod; 6. Liquid collection box; 7. Second electric telescopic rod; 8. Lifting pipe; 9. Liquid supply pipe; 10. First electric telescopic rod; 11. Lifting rod; 12. Inverted U-shaped plate; 13. Mounting bracket; 14. Ink supply frame; 15. Ink supply cartridge; 16. First L-shaped clamp; 17. Pull plate; 18. Flushing pipe; 19. Second L-shaped clamp; 20. Trapezoidal groove; 1. First clearance groove; 22. Print head; 23. First positioning cylinder; 24. First tension spring; 25. First compression spring; 26. Second positioning hole; 27. First slot; 28. Inclined block; 29. ​​First positioning hole; 30. Second positioning cylinder; 31. Positioning rod; 32. Positioning plate; 33. Second slot; 34. Second compression spring; 35. Second tension spring; 36. First mounting hole; 37. Second mounting hole; 38. Second clearance groove; 39. Top material cylinder. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1 to 14 As shown, the present invention provides an easily replaceable inkjet printhead, including a printer body 1 and a cleaning frame 2 fixed to the side of the printer body 1. A printhead cleaning machine 3 is installed on the side of the cleaning frame 2. An ink carriage 4 is disposed inside the printer body 1. A printhead 22 and an ink supply frame 14 are disposed inside the ink carriage 4. An ink supply cartridge 15 is installed inside the ink supply frame 14, and the ink outlet of the ink supply cartridge 15 is connected to the ink inlet of the printhead 22. First positioning mechanisms for limiting the displacement of the printhead 22 are provided on both the left and right sides of the ink carriage 4. First positioning mechanisms for limiting the displacement of the printhead 22 are provided on the front and rear sides of the ink carriage 4. The second positioning mechanism restricts the displacement of the ink supply frame 14. The inner bottom wall of the ink carriage 4 is provided with a first elastic ejector mechanism. A second elastic ejector mechanism is provided between the ink supply frame 14 and the print head 22. Two ejector rods 5 are fixedly connected to the inner wall of the cleaning frame 2. The two ejector rods 5 are used to release the two second positioning mechanisms from fixing the ink supply frame 14. The top of the printer body 1 is provided with a lifting mechanism for the ink supply frame 14 to move away from the ink carriage 4. The top of the cleaning frame 2 is provided with a cleaning mechanism for cleaning the print head 22, and the cleaning mechanism is connected to the print head cleaning machine 3.

[0022] The above solution involves assembling multiple ink supply cartridges 15 within an ink supply frame 14 for easy, unified disassembly. Individual disassembly of each cartridge is unnecessary; simply removing the ink supply frame 14 from the printhead cartridge 4 allows for the removal of each cartridge as a whole. The first positioning mechanism enables quick assembly of the printhead 22 into the printhead cartridge 4, and the second positioning mechanism enables quick assembly of the ink supply frame 14 into the printhead cartridge 4, connecting the ink supply cartridges 15 to the printhead 22. This eliminates the need for tools to secure the printhead 22 and ink supply frame 14 to the printhead cartridge 4 with screws. Pulling the first and second positioning mechanisms quickly removes the ink supply frame 14 and printhead 22 from the printhead cartridge 4, facilitating component replacement. Furthermore, the first and second elastic ejector mechanisms enable the printhead... The printhead 22 and ink supply frame 14 have an automatic pop-up feature within the ink carriage 4, making it convenient for personnel to remove the printhead 22 and ink supply frame 14. This avoids the inconvenience of reaching out and picking them up due to the narrow space inside the ink carriage 4. When the second positioning mechanism moves with the ink carriage 4 to the top rod 5, the top rod 5 can automatically release the second positioning mechanism from fixing the ink supply frame 14, thereby automatically lifting the ink supply frame 14 upwards inside the ink carriage 4. Then, the material lifting mechanism pulls the ink supply frame 14 up, detaching it from the ink carriage 4. This ensures that the subsequent cleaning mechanism moves into the ink carriage 4, allowing the cleaning mechanism and the printhead cleaning machine 3 to clean the printhead 22 in conjunction. This makes the printhead 22 not only easy to disassemble and replace but also automatically cleanable. In addition, the surface of the cleaning frame 2 is equipped with a transparent sealed door, which can be easily opened to maintain the internal components of the cleaning frame 2.

[0023] It is worth noting that the printhead 22, ink cartridge 15, printhead cleaning machine 3, and ink carriage 4 are all existing mature components. Their specific structures will not be detailed here. The ink carriage 4 can be moved into the cleaning frame 2 via an electric track inside the printer body 1, so that the printhead 22 can be cleaned by the cleaning mechanism without removing the printhead 22 from the ink carriage 4. The ink cartridge 15 can be installed in the ink supply frame 14 by a snap-fit ​​elastic buckle for easy replacement. The mechanics, parts, and equipment in this device all use conventional models in the existing technology, and the circuit connection also uses conventional connection methods in the existing technology, which will not be detailed here.

[0024] like Figures 2 to 8 and Figure 10As shown, each of the four corners of the printhead 22 is provided with a first slot 27 and a wedge 28 fixedly connected thereto, and the wedge 28 is located below the first slot 27. The first positioning mechanism includes two first L-shaped plates 16. One end of each of the two first L-shaped plates 16 slides through into the ink cartridge 4 and is engaged with the corresponding first slot 27. A pull plate 17 is fixedly connected between the two first L-shaped plates 16. Each first L-shaped plate 16 has a first mounting hole 36 on its inner side. Each first mounting hole 36 has a first tension spring 24 fixedly connected to its inner wall. The other end of the first tension spring 24 is fixedly connected to the surface of the ink cartridge 4.

[0025] Using the above solution: when the printhead 22 is inserted into the ink cartridge 4 for assembly, the inclined block 28 will first push one end of the first L-shaped clamping plate 16 outward and move it, and drive the first tension spring 24 to stretch until the printhead 22 is fully inserted into the bottom of the ink cartridge 4. Then, one end of the first L-shaped clamping plate 16 will automatically engage with the first slot 27 to prevent the printhead 22 from moving freely in the ink cartridge 4. The first elastic ejector mechanism is used to strengthen the stability of the printhead 22 in the ink cartridge 4.

[0026] like Figures 2 to 6 , Figure 9 , Figure 11 and Figure 14 As shown, positioning plates 32 are fixedly connected to both the front and rear of the ink supply frame 14. The surfaces of the two positioning plates 32 are provided with second slots 33. The second positioning mechanism includes a second L-shaped plate 19. One end of the second L-shaped plate 19 slides through into the ink carriage 4 and engages with the corresponding second slot 33. The inner side of the second L-shaped plate 19 is provided with a second mounting hole 37. A second tension spring 35 is fixedly connected to the inner wall of the second mounting hole 37. The other end of the second tension spring 35 is fixedly connected to the surface of the ink carriage 4.

[0027] Using the above scheme: When the ink supply frame 14 is inserted into the ink carriage 4 and assembled with the print head 22, the bottom of the positioning plate 32 will first push one end of the second L-shaped card plate 19 outward until the ink supply frame 14 is fully inserted. Then, under the elastic force of the second tension spring 35, the second L-shaped card plate 19 will move inward, so that one end of the second L-shaped card plate 19 will automatically insert into the second slot 33, thereby completing the quick assembly and fixation of the ink supply frame 14. When the two second L-shaped card plates 19 are pulled outward, the positioning of the ink supply frame 14 is easily released, which is conducive to quickly removing the ink supply frame 14 from the ink carriage 4.

[0028] like Figure 4 , Figure 7 and Figure 8 As shown, the front and rear of the printhead 22 are provided with second clearance grooves 38, and the diameter of the second clearance grooves 38 is larger than the end of the second L-shaped card plate 19 that extends into the ink cartridge 4.

[0029] By adopting the above solution: with the setting of the second clearance groove 38, when the print head 22 is assembled in the ink carriage 4, it will avoid one end of the second L-shaped card plate 19. When the print head 22 is taken out of the ink carriage 4 for replacement, it can also avoid contact with the second L-shaped card plate 19, thereby ensuring that the print head 22 can be taken out normally without being obstructed by the second L-shaped card plate 19, and ensuring that the print head 22 can pop up normally in the ink carriage 4.

[0030] like Figure 2 , Figure 4 , Figure 5 , Figure 11 and Figure 14 As shown, a trapezoidal groove 20 is provided on the side of the second L-shaped plate 19, and one end of the top rod 5 is adapted to the inclined surface of the inner wall of the trapezoidal groove 20.

[0031] Using the above scheme: when the ink carriage 4 moves to the right, the top rod 5 is inserted into the trapezoidal groove 20, which pushes the inclined surface in the trapezoidal groove 20, thereby causing the second L-shaped card plate 19 to move outward, so that the second L-shaped card plate 19 is disengaged from the second card groove 33, thus releasing the ink supply frame 14 from fixation. Finally, the ink supply frame 14 automatically pops up in the ink carriage 4.

[0032] like Figure 5 , Figure 6 and Figure 8 As shown, the four corners of the bottom surface of the printhead 22 are provided with first positioning holes 29. The first elastic ejector mechanism includes four first positioning cylinders 23. The four first positioning cylinders 23 are respectively fixed to the four corners of the bottom wall of the ink cartridge 4. The bottom wall of each first positioning cylinder 23 is fixedly connected to a first compression spring 25. The top of each first compression spring 25 is fixedly connected to an ejector cylinder 39. The ejector cylinder 39 is slidably sleeved on the surface of the first positioning cylinder 23. The top of each ejector cylinder 39 is slidably inserted into the corresponding first positioning hole 29.

[0033] The above solution is adopted as follows: When the printhead 22 is assembled in the ink cartridge 4, the top material cylinder 39 will be inserted into the corresponding first positioning hole 29. After the printhead 22 moves downward, it will drive the top material cylinder 39 to squeeze and compress the first compression spring 25 in the first positioning cylinder 23 until the printhead 22 is fixed in the ink cartridge 4 by the first positioning mechanism. This ensures that the printhead 22 is stably assembled in the ink cartridge 4 and prevents the printhead 22 from moving at will. When the first positioning mechanism is released from fixing the printhead 22, the top material cylinder 39 will lift the printhead 22 upward under the elastic force of the first compression spring 25. This mechanism not only guides the installation of the printhead 22, but also makes it convenient to remove the printhead 22 from the ink cartridge 4 for replacement.

[0034] like Figure 4 , Figure 7 , Figure 9 and Figure 12 As shown, a second positioning hole 26 is provided at each of the four corners of the upper surface of the print head 22. The second elastic ejector mechanism includes four positioning rods 31. The four positioning rods 31 are respectively fixed to the four corners of the bottom surface of the ink supply frame 14. A second compression spring 34 is fixed to the bottom end of each positioning rod 31. A second positioning cylinder 30 is fixed to the bottom end of each second compression spring 34. The second positioning cylinder 30 is slidably sleeved on the surface of the positioning rod 31. The bottom end of each second positioning cylinder 30 is slidably inserted into the corresponding second positioning hole 26.

[0035] Using the above scheme: when the ink supply frame 14 is assembled onto the print head 22, the second positioning cylinder 30 will be inserted into the second positioning hole 26 and squeeze and compress the second compression spring 34 until the ink supply frame 14 is fixed in the ink carriage 4 by the second positioning mechanism. When the second positioning mechanism releases the fixation of the ink supply frame 14, the positioning rod 31 will lift the ink supply frame 14 upward under the elastic force of the second compression spring 34, so that the second slot 33 is away from one end of the second L-shaped card plate 19. This makes it easier for personnel to remove the ink supply frame 14 from the ink carriage 4, making the operation more flexible and convenient, and also making it easier to replace the print head 22.

[0036] like Figure 2 , Figure 3 and Figure 9 As shown, a mounting bracket 13 is provided on the upper surface of the ink supply frame 14. The two ends of the mounting bracket 13 are detachably connected to the ink supply frame 14. An inverted U-shaped plate 12 is fixedly connected to the middle of the mounting bracket 13. The lifting mechanism includes a first electric telescopic rod 10. The first electric telescopic rod 10 is installed on the top inside the printer body 1. A lifting rod 11 is fixedly connected to the telescopic end of the first electric telescopic rod 10, and the lifting rod 11 is adapted to the inverted U-shaped plate 12.

[0037] Using the above scheme: As the ink cartridge 4 moves into the cleaning frame 2, the left ends of the two push rods 5 are respectively inserted into the trapezoidal slots 20 in the two second L-shaped clamping plates 19, automatically pushing the second L-shaped clamping plates 19 outwards. This further releases the two second L-shaped clamping plates 19 from the two second clamping slots 33. Under the action of the second elastic ejector mechanism, the ink supply frame 14 is automatically lifted upwards on the print head 22. The lifted inverted U-shaped plate 12 corresponds exactly to the lifting rod 11. As the ink cartridge 4 continues to move, the inverted U-shaped plate 12 will fit onto the lifting rod 11. At the same time, the ink cartridge 4 temporarily stops moving, and the operation of the first electric telescopic rod 10 drives the ink supply frame 14 upwards, thereby completely removing the ink supply frame 14 from the ink cartridge 4, ensuring that the ink cartridge 4 moves normally to the right afterwards. The system moves the ink carriage 4 to the left to facilitate cleaning of the printhead 22 via the cleaning mechanism. After the printhead 22 is cleaned, the ink supply frame 14 is moved to the left until it is aligned with the ink carriage 4. The movement of the ink carriage 4 is then stopped. The first electric telescopic rod 10 is then used to push the lifting rod 11 to press the inverted U-shaped plate 12 downward, further pressing the ink supply frame 14 into the ink carriage 4 and fixing it in place. The ink supply frame 14 is then automatically fixed in the ink carriage 4 by the second positioning mechanism. The ink carriage 4 is then moved to the left again, causing the inverted U-shaped plate 12 to automatically detach from the lifting rod 11. Finally, the first electric telescopic rod 10 drives the lifting rod 11 to reset. In addition, the two ends of the mounting bracket 13 can be connected to the ink supply frame 14 with screws, making it convenient to remove the mounting bracket 13 from the ink supply frame 14 and then remove and replace the ink supply cartridge 15.

[0038] like Figures 2 to 6 and Figure 13 As shown, a first clearance groove 21 is provided on the right side of the ink cartridge 4. The cleaning mechanism includes a second electric telescopic rod 7, which is installed at the top inside the cleaning frame 2. The telescopic end of the second electric telescopic rod 7 is fixedly connected to a lifting pipe 8. Several flushing pipes 18 are connected to the surface of the lifting pipe 8, and each flushing pipe 18 corresponds to an ink inlet on the printhead 22. The top of each flushing pipe 18 is connected to a liquid supply pipe 9, which passes through the cleaning frame 2 and is connected to the printhead cleaning machine 3. A liquid collection box 6 is provided on the inner bottom wall of the cleaning frame 2. The top of the liquid collection box 6 is lower than the horizontal plane of the ink nozzle of the printhead 22. The liquid collection box 6 is located directly below the lifting pipe 8. A drain pipe is connected to the side of the liquid collection box 6, and the drain pipe passes through to the outside of the cleaning frame 2.

[0039] Using the above solution: When the ink cartridge 4 moves into the cleaning frame 2 via the slide rail inside the printer body 1, the lifting tube 8 and the flushing tube 18 will enter the printer body 1 through the first clearance groove 21, ensuring that the flushing tube 18 can properly connect with the ink inlet of the printhead 22. After connection, the lifting tube 8 is moved downward by the operation of the second electric telescopic rod 7, so that the bottom of the flushing tube 18 is inserted into the ink inlet of the corresponding printhead 22. Since the liquid supply tube 9 is a flexible tube, it will not obstruct the flow of cleaning fluid in the printhead cleaning machine 3. The liquid supply pipe 9 enters the flushing pipe 18, and then the cleaning liquid is poured into the printhead 22 through the flushing pipe 18 by the operation of the printhead cleaning machine 3, thus achieving automatic cleaning of the printhead 22. The liquid collection box 6 facilitates the collection and discharge of the cleaning liquid after rinsing the printhead 22, and also helps to dry the bottom of the printhead 22 to ensure normal use in the future. In addition, the inner bottom wall of the liquid collection box 6 is sloping, so that the personnel can open the valve of the drain pipe outside the cleaning frame 2 to discharge it.

[0040] The working principle and usage process of this invention are as follows: When personnel need to remove and replace the printhead 22 from the ink carriage 4, firstly, pull the two second L-shaped clamping plates 19 outwards, causing them to be pulled out of the two second clamping slots 33 respectively, thus releasing the fixation on the ink supply frame 14. At the same time, under the elastic force of each second compression spring 34, the ink supply frame 14 is automatically lifted upwards. Then, personnel can directly remove the ink supply frame 14 from the ink carriage 4. Next, pull the two pulling plates 17 outwards, causing the first L-shaped clamping plates 16 to move away from the corresponding first clamping slots 27 respectively. Then, under the elastic force of each first compression spring 25, the top material cylinder 39 is automatically lifted upwards on the printhead 22. Then, personnel can directly remove the printhead 22 from the ink carriage. Remove the printhead 22 from cartridge 4 and assemble it in the ink cartridge 4. Insert the printhead 22 directly into the bottom of the ink cartridge 4, causing the wedge block 28 to move the corresponding first L-shaped clamping plate 16 outward until one end of the first L-shaped clamping plate 16 is inserted into the first slot 27, quickly positioning the printhead 22. At this time, the top material cylinder 39 compresses the first compression spring 25 downward to ensure the printhead 22 is securely in the ink cartridge 4 and prevent it from loosening. After the printhead 22 is assembled, insert the ink supply frame 14 directly into the ink cartridge 4 to connect the ink supply cartridge 15 with the printhead 22. During this process, the bottom of the positioning plate 32 will first press the second L-shaped clamping plate 19 outward until the second L-shaped clamping plate 19 is aligned with the second slot 33. Then, the second L-shaped card plate 19 automatically inserts into the second card slot 33, quickly positioning and fixing the ink supply frame 14. After the ink supply frame 14 is fixed, the bottom of the positioning rod 31 will squeeze and compress the second compression spring 34, allowing for quick replacement of the print head 22 without the need for manual operation. In addition, the print head 22 has an automatic cleaning feature within the cleaning frame 2. Specifically, the ink carriage 4 is moved via an electric slide rail. When the two second L-shaped card plates 19 move to the point of disengagement from the top rod 5, the top rod 5 will insert into the trapezoidal slot 20 and push the second L-shaped card plates 19 outward, thereby automatically lifting the ink supply frame 14 upward within the ink carriage 4. As the ink carriage 4 moves, the inverted U-shaped plate 12 smoothly fits onto the surface of the lifting rod 11, stopping the ink carriage. The ink supply frame 14 is pulled up from the ink carriage 4 by the operation of the first electric telescopic rod 10, disengaging it from the 4. The ink carriage 4 is then moved to the right, positioning the lifting tube 8 in the center of the 4. The second electric telescopic rod 7 is then operated to move the lifting tube 8 downwards, aligning the flushing tube 18 with the ink inlet of the printhead 22. The printhead cleaning machine 3 then injects cleaning fluid into the printhead 22 through the supply tube 9 and flushing tube 18 for cleaning. The cleaning fluid flows into the collection box 6 and is finally discharged through the drain tube. After cleaning, the printhead 22 is raised by the second electric telescopic rod 7, allowing the printhead 22 to dry in the collection box 6.To ensure proper operation, control the ink carriage 4 to move to the left, aligning the bottom of the ink supply frame 14 with the ink carriage 4. Once aligned, stop moving the ink carriage 4. Utilize the operation of the first electric telescopic rod 10 to cause the lifting rod 11 to press the mounting bracket 13 and the ink supply frame 14 downwards until the ink supply frame 14 is automatically positioned inside the ink carriage 4, requiring no manual assembly. After the ink supply frame 14 is fixed, the ink carriage 4 continues to move to the left, allowing the inverted U-shaped plate 12 to detach smoothly from the lifting rod 11. Finally, reset the first electric telescopic rod 10.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An easily replaceable inkjet printhead, comprising a printer body (1) and a cleaning frame (2) fixed to the side of the printer body (1), wherein a printhead cleaning machine (3) is mounted on the side of the cleaning frame (2), characterized in that: The printer body (1) contains an ink cartridge (4), which contains a print head (22) and an ink supply frame (14). An ink supply box (15) is installed inside the ink supply frame (14), and the ink outlet of the ink supply box (15) is connected to the ink inlet of the print head (22). The left and right sides of the ink cartridge (4) are each equipped with a first positioning mechanism to limit the displacement of the print head (22). The front and rear sides of the ink cartridge (4) are each equipped with a second positioning mechanism to limit the displacement of the ink supply frame (14). The inner bottom wall of the ink cartridge (4) is equipped with a second positioning mechanism. A second elastic ejector mechanism is provided between the ink supply frame (14) and the print head (22). Two ejector rods (5) are fixed to the inner wall of the cleaning frame (2). The two ejector rods (5) are used to release the two second positioning mechanisms from the fixed restriction of the ink supply frame (14). A lifting mechanism for the ink supply frame (14) to move away from the ink carriage (4) is provided at the top inside the printer body (1). A cleaning mechanism for cleaning the print head (22) is provided at the top inside the cleaning frame (2), and the cleaning mechanism is connected to the print head cleaning machine (3).

2. The easily replaceable inkjet printhead according to claim 1, characterized in that: The printhead (22) has a first slot (27) and a wedge (28) fixed at each of its four corners. The wedge (28) is located below the first slot (27). The first positioning mechanism includes two first L-shaped plates (16). One end of each of the two first L-shaped plates (16) slides through into the ink cartridge (4) and is engaged in the corresponding first slot (27). A pull plate (17) is fixed between the two first L-shaped plates (16). A first mounting hole (36) is opened on the inner side of each first L-shaped plate (16). A first tension spring (24) is fixed to the inner wall of each first mounting hole (36). The other end of the first tension spring (24) is fixed to the surface of the ink cartridge (4).

3. The easily replaceable inkjet printhead according to claim 1, characterized in that: Positioning plates (32) are fixedly connected to the front and back of the ink supply frame (14). The surfaces of the two positioning plates (32) are provided with second slots (33). The second positioning mechanism includes a second L-shaped plate (19). One end of the second L-shaped plate (19) slides through into the ink carriage (4) and is engaged in the corresponding second slot (33). The inner side of the second L-shaped plate (19) is provided with a second mounting hole (37). The inner wall of the second mounting hole (37) is fixedly connected with a second tension spring (35). The other end of the second tension spring (35) is fixedly connected to the surface of the ink carriage (4).

4. The easily replaceable inkjet printhead according to claim 3, characterized in that: The printhead (22) has a second clearance groove (38) on both the front and back, and the diameter of the second clearance groove (38) is larger than the end of the second L-shaped card plate (19) that extends into the ink cartridge (4).

5. The easily replaceable inkjet printhead according to claim 3, characterized in that: The second L-shaped card plate (19) has a trapezoidal groove (20) on its side, and one end of the top rod (5) is adapted to the inner wall slope of the trapezoidal groove (20).

6. The easily replaceable inkjet printhead according to claim 1, characterized in that: The printhead (22) has four corners of the bottom surface with first positioning holes (29). The first elastic ejector mechanism includes four first positioning cylinders (23). The four first positioning cylinders (23) are fixedly connected to the four corners of the bottom wall of the ink cartridge (4). The bottom wall of each first positioning cylinder (23) is fixedly connected to a first compression spring (25). The top of each first compression spring (25) is fixedly connected to an ejector cylinder (39). The ejector cylinder (39) is slidably sleeved on the surface of the first positioning cylinder (23). The top of each ejector cylinder (39) is slidably inserted into the corresponding first positioning hole (29).

7. The easily replaceable inkjet printhead according to claim 1, characterized in that: The printhead (22) has four corners on its upper surface, each with a second positioning hole (26). The second elastic ejector mechanism includes four positioning rods (31). The four positioning rods (31) are fixedly connected to the four corners on the bottom surface of the ink supply frame (14). Each positioning rod (31) has a second compression spring (34) fixedly connected to its bottom end. Each second compression spring (34) has a second positioning cylinder (30) fixedly connected to its bottom end. The second positioning cylinder (30) is slidably sleeved on the surface of the positioning rod (31). The bottom end of each second positioning cylinder (30) is slidably inserted into the corresponding second positioning hole (26).

8. The easily replaceable inkjet printhead according to claim 1, characterized in that: The upper surface of the ink supply frame (14) is provided with a mounting bracket (13). The two ends of the mounting bracket (13) are detachably connected to the ink supply frame (14). The middle part of the mounting bracket (13) is fixedly connected to an inverted U-shaped plate (12). The material lifting mechanism includes a first electric telescopic rod (10). The first electric telescopic rod (10) is installed on the top inside the printer body (1). The telescopic end of the first electric telescopic rod (10) is fixedly connected to a lifting rod (11), and the lifting rod (11) is adapted to the inverted U-shaped plate (12).

9. The easily replaceable inkjet printhead according to claim 1, characterized in that: The right side of the ink cartridge (4) is provided with a first clearance groove (21). The cleaning mechanism includes a second electric telescopic rod (7). The second electric telescopic rod (7) is installed at the top inside the cleaning frame (2). The telescopic end of the second electric telescopic rod (7) is fixedly connected to a lifting pipe (8). The surface of the lifting pipe (8) is connected to several flushing pipes (18). The flushing pipes (18) correspond one-to-one with the ink inlet on the print head (22). The top of each flushing pipe (18) is connected to a liquid supply pipe (9). The liquid supply pipe (9) passes through the cleaning frame (2) and is connected to the print head cleaning machine (3).

10. The easily replaceable inkjet printhead according to claim 9, characterized in that: The bottom wall of the cleaning frame (2) is provided with a liquid collection box (6), and the top of the liquid collection box (6) is lower than the horizontal plane of the ink nozzle of the print head (22). The liquid collection box (6) is located directly below the lifting tube (8). The side of the liquid collection box (6) is connected to a drain pipe, and the drain pipe extends to the outside of the cleaning frame (2).

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