A digital inkjet printer and inkjet assembly

Abstract

The present application relates to inkjet printing device technical field, specifically to digital inkjet printer, including fuselage, be equipped with installation shell on the fuselage, be slidably arranged with adjusting plate in installation shell, and the space in installation shell is divided into water storage cavity and wetting cavity by adjusting plate, and the side away from adjusting plate of wetting cavity is equipped with opening, still including the wetting part of fixed installation on adjusting plate, and the wetting part of wetting part is located in wetting cavity, and the water absorption part of wetting part extends into the inside of water storage cavity, and the top of wetting part and the top of water absorption part are integrated as a whole.The nozzle of inkjet head will be resisted on wetting part when idle state, effectively prevent the ink solidification in nozzle when inkjet head is not used for a long time, cause nozzle to appear to be blocked, and the present application utilizes humidity sensor to monitor the humidity of wetting part, again cooperate with the water level in water storage cavity can be adjusted, ensure that wetting part can always obtain the appropriate moisture supply, thereby guarantee the wetting effect of inkjet head.

Description

Technical Field

[0001] This invention relates to the field of inkjet printing equipment technology, specifically to a digital inkjet printer and inkjet components. Background Technology

[0002] Inkjet printers are output devices that use nozzles to spray liquid ink into tiny droplets, which then adhere to printing media such as paper to form text. Inkjet printers mainly use two technologies: thermal inkjet (heating ink to generate bubbles for inkjet spraying) or piezoelectric (deformation of piezoelectric elements to expel ink).

[0003] Thermal foaming technology: The heating element inside the nozzle instantly heats up to over 300°C, causing local ink to vaporize and form bubbles. The bubbles expand and squeeze out the ink droplets. After heating stops, the bubbles contract and create negative pressure to draw in new ink.

[0004] Piezoelectric technology: Piezoelectric crystals deform under voltage, squeezing the ink cavity to eject ink droplets. The size of the ink droplets and the ejection speed can be precisely adjusted by controlling the voltage waveform.

[0005] Both technologies use precision stepper motors to control the lateral movement of the printhead, and digital signals to control the jetting sequence of thousands of nozzles, achieving droplet positioning accuracy of up to 1 / 600 inch.

[0006] Inkjet printers have a wide range of applications, including home users, office environments, commercial printing, and industrial fields.

[0007] Advantages of inkjet typewriters:

[0008] Low printing costs: Compared to laser printers, inkjet printers have lower printing costs and are more suitable for printing documents.

[0009] Wide range of applications: Inkjet printers are suitable for printing on various materials, including paper, cloth, plastics, etc.

[0010] Quick start: Inkjet printers typically do not require preheating and can quickly start printing tasks.

[0011] In practical applications of inkjet printing technology, inkjet printers are key equipment. When the equipment is idle for a long time, the ink on the nozzle surface will solidify due to physical and chemical processes such as solvent evaporation and pigment / dye deposition, forming solid or semi-solid ink stains. This causes the nozzle orifice to shrink or even become completely blocked, leading to quality defects such as broken lines and color shifts, which seriously affect the output quality.

[0012] To address this issue, existing technologies commonly employ wetting pads as nozzle moisturizing components. Wetting pads are typically made of porous polymer materials (such as polyurethane foam) with a porous structure that can adsorb and slowly release moisturizing liquid, thereby inhibiting ink evaporation and curing. However, due to the intermittent operation of the equipment and fluctuations in ambient temperature and humidity, the moisturizing liquid in the wetting pad undergoes a continuous evaporation-adsorption cycle. When the equipment is shut down for an extended period or when operators fail to replenish the moisturizing liquid regularly according to maintenance procedures, the porous structure of the wetting pad will gradually lose its capillary adsorption capacity due to liquid phase change (liquid → gas), causing its liquid content to fall below the critical threshold. The wetting pad then dries out, severely affecting the wetting effect on the nozzle.

[0013] It should be noted that as the equipment is used repeatedly, the wetting pad will gradually absorb non-volatile components such as pigment particles and resin binders from the ink, forming ink residue. These residues will not only clog the pore structure of the wetting pad and reduce its performance, leading to a decrease in the nozzle's moisturizing effect, but may also breed bacteria and mold, which will have an adverse effect on the hygiene and lifespan of the printing equipment.

[0014] Currently, the cleaning and maintenance of wetting pads mainly relies on manual intervention. Operators need to use special tools (such as tweezers and plastic scrapers) to carefully disassemble the wetting pad assembly and then transfer it to the cleaning tank for ink removal. Afterward, the wetting pad needs to be reinstalled, which is a time-consuming and labor-intensive process. Summary of the Invention

[0015] In view of the above situation and to overcome the defects of the prior art, the present invention provides a digital inkjet printer and inkjet assembly to solve the above problems.

[0016] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0017] A digital inkjet printer includes a machine body with a mounting shell. An adjustment plate is slidably disposed inside the mounting shell, dividing the space inside the mounting shell into a water storage chamber and a wetting chamber. The wetting chamber has an opening on the side away from the adjustment plate. The printer also includes a wetting component fixedly mounted on the adjustment plate. The wetting part of the wetting component is located inside the wetting chamber, and the water-absorbing part of the wetting component extends into the interior of the water storage chamber. The top of the wetting part is integrated with the top of the water-absorbing part.

[0018] The mounting housing is equipped with a cylinder and a humidity sensor. The cylinder is electrically connected to the humidity sensor. The detection part of the humidity sensor is matched with the wetting part. An elastic connector is installed between the free end of the cylinder and the adjustment plate. A water squeezing component is rotatably arranged between the adjustment plate and the wetting part. The water squeezing component is equipped with a rotating mechanism, which is linked to the adjustment plate.

[0019] Preferably, the mounting housing is provided with a water inlet, which is in fluid communication with the water storage chamber, and a float valve matching the water inlet is installed in the water storage chamber;

[0020] The bottom of the mounting housing is provided with a sewage collection chamber, and the top of the sewage collection chamber is in fluid communication with the bottom of the wetting chamber.

[0021] Preferably, the rotating mechanism includes a ball screw mounted on the mounting housing, and a one-way bearing is coaxially mounted on the free end of the ball screw, and the water-squeezing component is fixedly connected to the one-way bearing.

[0022] Preferably, it also includes an electric guide rail set on the top of the machine body, on which a plurality of platforms are set. A nozzle support is slidably set on the machine body along the direction of platform movement. The nozzle support is provided with a receiving component. When the platform moves to the point of hitting the receiving component, the platform drives the nozzle support to move synchronously.

[0023] Preferably, the receiving component includes a rotating unit mounted on the receiving component, and the output end of the rotating unit is provided with a receiving body.

[0024] Preferably, a sleeve is installed on the top of the machine body, and an annular piston is slidably and sealed inside the sleeve. A fixing tube is fixedly connected to one side of the annular piston, and the other end of the fixing tube extends out of the sleeve and is fixedly connected to the nozzle support. A spring is sleeved on the fixing tube between the nozzle support and the sleeve. One-way valves are provided on the sleeve and inside the fixing tube.

[0025] Preferably, the water inlet of the mounting shell is in fluid communication with the output end of the fixed pipe.

[0026] An inkjet assembly, used in a digital inkjet printer, includes a displacement adjustment mechanism and an inkjet head, wherein the displacement adjustment mechanism is mounted on a printhead support.

[0027] Preferably, it also includes a cooling pipe, the input end of which is in fluid communication with the output end of the fixed pipe.

[0028] Preferably, the displacement adjustment mechanism consists of a vertical electric guide rail module, a horizontal electric guide rail module, and an electric telescopic rod.

[0029] The beneficial effects of this invention are as follows:

[0030] 1. When the inkjet head is idle, the nozzle of the inkjet head will press against the wetting part, effectively preventing the ink in the nozzle from solidifying and causing the nozzle to become clogged when the inkjet head is not used for a long time. In addition, the present invention uses a humidity sensor to monitor the humidity of the wetting part, and can adjust the water level in the water storage chamber to ensure that the wetting part always receives an appropriate amount of water supply, thereby ensuring the wetting effect of the inkjet head.

[0031] 2. As the number of times the equipment is used accumulates, a large amount of water and ink residue will gradually accumulate in the wetting section. By repeatedly extending and retracting the cylinder, the squeezing component rotates intermittently, applying pressure to the wetting section. The water and ink mixture will be continuously squeezed out of the wetting section. Through the periodic rotation and cleaning operation of the squeezing component, these residues can be removed in time, restoring the performance of the wetting section and ensuring that the printing equipment is always in good working condition, thus improving the stability and reliability of printing.

[0032] 3. During the printing process of this invention, the platform moves linearly under the drive of the electric guide rail. When it reaches the top of the support, the inkjet head moves synchronously with the platform. While the platform is in motion, the inkjet head performs the printing operation, thereby improving the working efficiency of the equipment.

[0033] 4. During the printing process of this invention, water can be replenished into the water storage chamber and water can be injected into the cooling pipe. The cooling pipe is used to cool down the components of this invention, preventing the components of this invention from becoming too hot during the printing process and affecting the operation, so that this invention can continue to operate. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0035] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0036] Figure 3 This is a cross-sectional structural diagram of the mounting shell of the present invention.

[0037] Figure 4 This is a cross-sectional structural diagram of the sleeve of the present invention.

[0038] Figure 5 For the present invention Figure 2 A magnified structural diagram of part A in the middle.

[0039] In the attached diagram: 1. Body; 2. Electric guide rail; 3. Platform; 4. Mounting housing; 5. Adjustment plate; 6. Water storage chamber; 7. Wetting chamber; 8. Wetting component; 9. Wetting section; 10. Water suction section; 11. Cylinder; 12. Humidity sensor; 13. Flexible connector; 14. Water squeezing component; 15. Float valve; 16. Wastewater collection chamber; 17. Ball screw; 18. One-way bearing; 19. Rotating unit; 20. Support body; 21. Sleeve; 22. Annular piston; 23. Fixed tube; 24. Spring; 25. One-way valve; 26. Inkjet head; 27. Cooling pipe; 28. Printhead support component; 29. ​​Vertical electric guide rail module; 30. Horizontal electric guide rail module; 31. Electric telescopic rod. Detailed Implementation

[0040] The following will be for reference. Figures 1 to 5 The various embodiments of the present invention will be described in detail below. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0041] Digital inkjet printers, such as Figures 1-3 As shown, the device includes a body 1, on which a mounting shell 4 is provided. An adjusting plate 5 is slidably disposed inside the mounting shell 4. The adjusting plate 5 divides the space inside the mounting shell 4 into a water storage chamber 6 and a wetting chamber 7. The wetting chamber 7 has an opening on the side away from the adjusting plate 5. The device also includes a wetting component 8 fixedly mounted on the adjusting plate 5. The wetting component 8 is made of a hydrophilic material, such as polyurethane foam. The wetting part 9 of the wetting component 8 is located inside the wetting chamber 7. The water-absorbing part 10 of the wetting component 8 extends into the interior of the water storage chamber 6, and the top of the wetting part 9 is integrated with the top of the water-absorbing part 10.

[0042] The water storage chamber 6 serves as a water reservoir for the wetting system, possessing sufficient volume and excellent sealing performance to provide a continuous water supply to the water absorption section 10. The water absorption section 10, with its superior hydrophilicity and capillary structure, can actively absorb water from the water storage chamber 6 and transport it to the wetting section 9 via an internal water transfer mechanism. After obtaining sufficient water, the wetting section 9, through its close contact with the inkjet head 26, evenly coats the nozzle surface with water, effectively preventing ink from solidifying inside the nozzle when the inkjet head 26 is not used for extended periods or is in a dry environment. This avoids nozzle clogging and ensures efficient and stable operation of the printing equipment and high print quality.

[0043] like Figure 3 As shown, a cylinder 11 and a humidity sensor 12 are mounted on the mounting housing 4. The cylinder 11 and the humidity sensor 12 are electrically connected. The detection part of the humidity sensor 12 is matched with the wetting part 9. The humidity sensor 12 is used to monitor the humidity change of the wetting part 9. An elastic connector 13 is installed between the free end of the cylinder 11 and the adjustment plate 5. The elastic connector 13 is a mechanical connection element with elastic deformation capability, such as a rubber or spring connector.

[0044] The position of the adjusting plate 5 can be adjusted by extending and retracting the cylinder 11. The volume and shape of the water storage chamber 6 will change with the position of the adjusting plate 5, thereby adjusting the water level in the water storage chamber 6 and ensuring that the wetting component 8 can always obtain an appropriate amount of water supply, thus ensuring the wetting effect of the inkjet head 26, effectively preventing nozzle clogging, improving printing quality and equipment reliability.

[0045] A water-squeezing component 14 is rotatably disposed between the adjusting plate 5 and the wetting part 9. The water-squeezing component 14 is provided with a rotating mechanism, which is linked with the adjusting plate 5. A sewage collection chamber 16 is provided at the bottom of the mounting shell 4, and the top of the sewage collection chamber 16 is in fluid communication with the bottom of the wetting chamber 7.

[0046] As the number of times the equipment is used accumulates, a large amount of ink residue will gradually accumulate in the wetting section 9. This residue will not only affect the normal wetting effect of the wetting section 9 on the inkjet head 26, but may also breed bacteria and mold, thus adversely affecting the hygiene and service life of the printing equipment.

[0047] When the water-squeezing member 14 rotates, it applies pressure to the wetting part 9, and the water-ink mixture is continuously squeezed out from the wetting part 9. The squeezed water-ink mixture flows into the interior of the sewage collection chamber 16 for subsequent unified treatment and recycling.

[0048] By periodically rotating the desqueezing component 14, these ink residues can be removed in a timely manner, restoring the performance of the wetting section 9, ensuring that the printing equipment is always in good working condition, and improving the stability and reliability of printing.

[0049] like Figure 3 As shown, the mounting housing 4 is provided with a water inlet, which is in fluid communication with the water storage chamber 6. A float valve 15 matching the water inlet is installed in the water storage chamber 6.

[0050] The rotating mechanism includes a ball screw 17 mounted on the mounting housing 4. The ball screw 17 is securely mounted on the mounting housing 4 through a specific mechanical connection method, such as a bearing seat. Its axial direction matches the movement direction of the adjusting plate 5. A one-way bearing 18 is coaxially mounted on the free end of the ball screw 17. The water squeezing component 14 is fixedly connected to the one-way bearing 18.

[0051] During the ink residue cleaning process of this device, the adjusting plate 5 moves linearly under the driving force of the cylinder 11. When the adjusting plate 5 moves to the side of the opening, the ball screw 17 cooperates with the one-way bearing 18. At this time, the torque applied by the ball screw 17 to the one-way bearing 18 causes the one-way bearing 18 to be in a free rotation state, which in turn drives the water squeezing component 14 connected to it to rotate, applying a squeezing action to the ink mixture in the wetting part 9, squeezing it out of the wetting part 9, and realizing the ink residue cleaning operation.

[0052] When the adjusting plate 5 moves in the reverse direction, the direction of movement of the ball screw 17 also changes. At this time, the direction of the torque applied to the one-way bearing 18 makes the one-way bearing 18 rotate in a stationary state, so the water squeezing part 14 connected to it will not rotate.

[0053] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, it also includes an electric guide rail 2 set on the top of the body 1, with several platforms 3 set on the electric guide rail 2. A nozzle support 28 is slidably set on the body 1 along the direction of movement of the platform 3. A sleeve 21 is installed on the top of the body 1. An annular piston 22 is slidably and sealed inside the sleeve 21. A fixing tube 23 is fixedly connected to one side of the annular piston 22. The other end of the fixing tube 23 extends out of the sleeve 21 and is fixedly connected to the nozzle support 28. The cooperation between the sleeve 21 and the fixing tube 23 ensures the stability of the linear movement of the nozzle support 28. A receiving part is provided on the nozzle support 28. When the platform 3 moves to the receiving part, the platform 3 drives the nozzle support 28 to move synchronously. A spring 24 is sleeved on the fixing tube 23 between the nozzle support 28 and the sleeve 21.

[0054] The receiving component includes a rotating unit 19 mounted on the receiving component, and the output end of the rotating unit 19 is provided with a receiving body 20.

[0055] The platform 3 moves linearly under the drive of the electric guide rail 2. When it reaches the support body 20, the platform 3 applies a pushing force to the support body 20, causing the nozzle support 28 to move synchronously with the platform 3. At the same time, the fixing tube 23 is retracted into the sleeve 21. It should be noted that the spring 24 is compressed to provide a buffering effect when the platform 3 reaches the support body, reducing the impact force on the components.

[0056] like Figure 1 As shown, the inkjet assembly, used in a digital inkjet printer, includes a displacement adjustment mechanism and an inkjet head 26. The inkjet head 26 has its own rotation system, such as a rotary motor, and the inkjet head 26 can adjust its direction as needed. The displacement adjustment mechanism is mounted on the printhead support 28.

[0057] By having the inkjet head 26 move synchronously with the platform 3, the inkjet head 26 prints on the cardboard on the platform 3 while the platform 3 is in motion, thereby improving the overall operating efficiency of the equipment.

[0058] like Figures 2-4 As shown, a one-way valve 25 is provided on both the sleeve 21 and inside the fixed pipe 23. The water inlet of the mounting shell 4 is in fluid communication with the output end of the fixed pipe 23. The one-way valve 25 on the sleeve 21 is connected to an external water storage facility, such as a water storage tank.

[0059] It also includes cooling pipes 27, which are distributed on components such as the displacement adjustment mechanism and the inkjet head 26. The input end of the cooling pipes 27 is in fluid communication with the output end of the fixed pipe 23. The cooling pipes 27 are used to cool down the components of this device to prevent them from being too hot and affecting the operation of this device, so that this device can operate continuously.

[0060] After the printing job is completed, the rotating unit 19 drives the receiving body 20 to rotate, causing the receiving body 20 to separate from the platform 3, and the spring 24 pushes against the nozzle support 28 to reset it.

[0061] It should be noted that during the printing process of this device, the annular piston 22 performs linear reciprocating motion within the sleeve 21. Combined with the setting of two one-way valves 25, water can be injected into the water storage chamber 6 and the cooling pipe 27.

[0062] The displacement adjustment mechanism consists of a vertical electric guide rail module 29, a horizontal electric guide rail module 30, and an electric telescopic rod 31. The displacement adjustment mechanism is used to drive the inkjet head 26 to move in multiple directions to adapt to the printing operation of this device.

[0063] During the printing process, the platform 3 moves linearly under the drive of the electric guide rail 2. When it reaches the support body 20, the platform 3 applies a pushing force to the support body 20, causing the printhead support 28 to move synchronously with the platform 3. At the same time, the fixing tube 23 retracts into the sleeve 21 and is compressed by the spring 24 to provide a buffering effect when the platform 3 reaches the support body, reducing the impact force on the parts. The inkjet head 26 moves synchronously with the platform 3. While the platform 3 is in continuous motion, the inkjet head 26 prints on the cardboard on the platform 3. Compared with traditional printers, where the conveyor belt needs to stop intermittently to allow the printhead to print on the cardboard above it, this device has a higher printing efficiency.

[0064] After each printing job is completed, the rotating unit 19 drives the receiving body 20 to rotate, causing the receiving body 20 to disengage from the platform 3, and the spring 24 pushes against the nozzle support 28 to reset it. During the continuous printing operation of this device, the annular piston 22 performs linear reciprocating motion in the sleeve 21. With the help of the two one-way valves 25, water can be injected into the water storage chamber 6 and the cooling pipe 27. The cooling pipe 27 is used to cool down the components of this device to prevent them from overheating and affecting the operation of this device, so that this device can operate continuously.

[0065] It should be noted that during the entire water replenishment process, the float valve 15 continuously monitors the water level in the water storage chamber 6 in real time. As the water level rises, the buoyancy of the float assembly gradually increases. When the water level reaches the set maximum water level, the float assembly stops rising and drives its own lever mechanism to rotate, so that the valve core re-fits tightly with the valve seat sealing surface, cutting off the water flow channel, thereby accurately controlling the water level in the water storage chamber 6 to maintain within the preset range.

[0066] After the printing operation is completed by this device, Figure 1For reference, control the inkjet head 26 to move to the left so that it is stored on one side, and make its nozzle press against the wetting part 9. The close contact between the wetting part 9 and the inkjet head 26 effectively prevents the ink in the nozzle from solidifying when the inkjet head 26 is not used for a long time, thereby avoiding the problem of nozzle clogging.

[0067] It should be noted that when the inkjet head 26 contacts the wetting part 9, the adjusting plate 5 can slide slightly due to the setting of the elastic connector 13, thereby providing a buffer. After the adjusting plate 5 slides, the water level in the water storage chamber 6 rises, and the length of the water absorption part 10 immersed in the water increases, ensuring that the wetting part 8 can obtain an appropriate amount of water supply, thereby ensuring the wetting effect of the inkjet head 26.

[0068] When the device is in a stopped state, the wetting part 8 will undergo a continuous water evaporation-adsorption cycle due to the influence of ambient temperature and humidity. The water level in the water storage chamber 6 will gradually decrease. If the water level decreases to the point where the water absorption part 10 is no longer immersed in water, the humidity of the wetting part 9 will continue to decrease, causing the wetting part 9 to enter a dry state, which will seriously affect the wetting effect on the inkjet head 26.

[0069] When the humidity sensor 12 detects that the humidity of the wetting part 9 is too low, the cylinder 11 contracts, causing the regulating plate 5 to move and the water level in the water storage chamber 6 to rise, ensuring that the wetting part 8 can always obtain an appropriate amount of water supply, thereby ensuring the wetting effect of the inkjet head 26, effectively preventing nozzle clogging, improving printing quality and equipment reliability.

[0070] It is worth noting that as the number of times the equipment is run accumulates, a large amount of water and ink residue will gradually accumulate in the wetting section 9. By controlling the cylinder 11 to repeatedly extend and retract, and in conjunction with the setting of the ball screw 17, the water squeezing component 14 is made to rotate intermittently. The water squeezing component 14 applies squeezing pressure to the wetting section 9, and the water and ink mixture will be continuously squeezed out from the wetting section 9. The squeezed water and ink mixture will flow into the interior of the sewage collection chamber 16 for subsequent unified treatment and recycling.

[0071] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0072] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A digital inkjet printer, comprising a machine body (1), characterized in that, The body (1) is provided with a mounting shell (4), and an adjustment plate (5) is slidably provided inside the mounting shell (4). The adjustment plate (5) divides the space inside the mounting shell (4) into a water storage chamber (6) and a wetting chamber (7). The wetting chamber (7) has an opening on the side away from the adjustment plate (5). It also includes a wetting component (8) fixedly installed on the adjustment plate (5). The wetting part (9) of the wetting component (8) is located inside the wetting chamber (7). The water absorption part (10) of the wetting component (8) extends into the interior of the water storage chamber (6), and the top of the wetting part (9) is connected to the top of the water absorption part (10). The mounting housing (4) is equipped with a cylinder (11) and a humidity sensor (12). The cylinder (11) and the humidity sensor (12) are electrically connected. The detection part of the humidity sensor (12) is matched with the wetting part (9). An elastic connector (13) is installed between the free end of the cylinder (11) and the adjustment plate (5). A water squeezing part (14) is rotatably provided between the adjustment plate (5) and the wetting part (9). The water squeezing part (14) is provided with a rotating mechanism, which is linked with the adjustment plate (5). The mounting shell (4) is provided with a water inlet, which is in fluid communication with the water storage chamber (6). A float valve (15) matching the water inlet is installed in the water storage chamber (6). The bottom of the mounting shell (4) is provided with a sewage collection chamber (16), and the top of the sewage collection chamber (16) is in fluid communication with the bottom of the wetting chamber (7). It also includes an electric guide rail (2) set on the top of the body (1), on which a number of platforms (3) are set. A nozzle support (28) is slidably set on the body (1) along the direction of movement of the platform (3). A receiving part is provided on the nozzle support (28). When the platform (3) moves to the point of hitting the receiving part, the platform (3) drives the nozzle support (28) to move synchronously. The receiving component includes a rotating unit (19) mounted on the receiving component, and the output end of the rotating unit (19) is provided with a receiving body (20).

2. The digital inkjet printer according to claim 1, characterized in that, The rotating mechanism includes a ball screw (17) mounted on the mounting housing (4), and a one-way bearing (18) is coaxially mounted on the free end of the ball screw (17). The water squeezing component (14) is fixedly connected to the one-way bearing (18).

3. The digital inkjet printer according to claim 1, characterized in that, A sleeve (21) is installed on the top of the body (1). An annular piston (22) is slidably and sealed inside the sleeve (21). A fixed tube (23) is fixedly connected to one side of the annular piston (22). The other end of the fixed tube (23) extends out of the sleeve (21) and is fixedly connected to the nozzle support (28). A spring (24) is sleeved on the fixed tube (23) between the nozzle support (28) and the sleeve (21). A one-way valve (25) is provided on both the sleeve (21) and inside the fixed tube (23).

4. The digital inkjet printer according to claim 3, characterized in that, The water inlet of the mounting shell (4) is in fluid communication with the output end of the fixed pipe (23).

5. An inkjet assembly, used in the digital inkjet printer as described in claim 3, characterized in that, It includes a displacement adjustment mechanism and an inkjet head (26), wherein the displacement adjustment mechanism is mounted on the printhead support (28).

6. The inkjet assembly according to claim 5, characterized in that, It also includes a cooling pipe (27), the inlet of which is in fluid communication with the outlet of the fixed pipe (23).

7. The inkjet assembly according to claim 5, characterized in that, The displacement adjustment mechanism consists of a vertical electric rail module (29), a horizontal electric rail module (30), and an electric telescopic rod (31).

Images