An automatic inkjet printing device

Abstract

The present invention discloses an automatic inkjet printing device, which relates to the field of printing devices, including a chassis and an inkjet head, wherein a telescopic box controlled by a telescopic component is installed in the chassis, a cleaning chamber for cleaning the inkjet head is arranged in the telescopic box, and a fixed platform is fixedly connected on both sides of the end, the fixed platform is provided with multiple groups of limiting structures facing each other, and a rotating plate is rotatably connected between the limiting structures, the rotating plate can slide in the direction of the retraction of the telescopic box, the top and bottom surfaces of the rotating plate are both connected with cleaning cotton, and toothed belts are arranged on both sides, a driving gear for meshing with the toothed belt is arranged in the chassis, the driving gear is rotated to make the rotating plate slide in the direction of the retraction of the telescopic box, and the elastic component is compressed during the sliding process of the rotating plate to accumulate elastic potential energy. The present invention effectively cleans the nozzle of the inkjet head to avoid poor ink ejection at the nozzle of the inkjet head.

Description

Technical Field

[0001] The invention relates to the field of printing equipment, in particular to an inkjet automatic printing equipment. Background Art

[0002] Inkjet printing is a contactless, pressure-free, plateless printing method. The information stored in the computer can be input into the inkjet printer for printing. No plate making or color registration is required, and higher printing quality can be produced than traditional methods. It is easy to operate, has stable performance and high precision.

[0003] The existing inkjet printer is composed of a system controller, an inkjet controller, a nozzle, a substrate drive mechanism, etc.; under the control of the inkjet controller, the ink is sprayed out from the nozzle of the nozzle and printed on the substrate; according to the printing requirements, the driver transports the substrate, and the system controller is responsible for the operation of the entire machine.

[0004] With regard to the above-mentioned related technologies, when the existing inkjet automatic printing equipment has not been in operation for a long time, the ink at the nozzle is prone to dryness, and the ink particles will adhere to the inner wall of the nozzle, resulting in poor ink discharge from the nozzle. In summary, the existing inkjet automatic printing equipment is prone to poor ink discharge from the nozzle after not being used for a long time. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide an inkjet automatic printing device to solve the technical problem that the existing inkjet automatic printing device is prone to poor ink ejection from the nozzle after being not used for a long time.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an inkjet automatic printing device, comprising a chassis and an inkjet head, a telescopic box which is controlled to be telescopic by a telescopic component installed in the chassis, a cleaning chamber for cleaning the inkjet head is arranged in the telescopic box, and a fixed platform is fixedly connected to both sides of the end, the fixed platform is provided with a plurality of sets of limiting structures facing each other, and a rotating plate is rotatably connected between the limiting structures, the rotating plate can slide in the direction of retraction of the telescopic box, the top and bottom surfaces of the rotating plate are both connected to cleaning cotton, and toothed belts are arranged on both sides, a driving gear for engaging with the toothed belt is arranged in the chassis, the driving gear is rotated to make the rotating plate slide in the direction of retraction of the telescopic box, and the elastic component will be compressed during the sliding of the rotating plate to accumulate elastic potential energy.

[0007] By adopting the above technical solution, a telescopic box is arranged in the chassis, and a cleaning chamber for cleaning the inkjet head is arranged in the telescopic box. The cleaning chamber is covered with a rotating sheet with cleaning cotton on both sides. After the inkjet head is cleaned in the cleaning chamber, the surface of the cleaning cotton is wiped to effectively clean the nozzle of the inkjet head, thereby avoiding poor ink spraying at the nozzle of the inkjet head.

[0008] The present invention is further configured as follows: a plurality of nozzles are arranged on the inkjet head, heating wires are arranged at intervals in the nozzles, a lifting groove is provided below the heating wires, a hollow lifting column is slidably connected in the lifting groove, and the bottom end of each lifting column corresponding to the nozzle is fixedly connected with an elastic constriction, the inner wall diameter of the elastic constriction is the same as the outer wall diameter of the lifting column, and the bottom end is an inverted cone constriction structure, the top end of the lifting column is in contact with a pressure strip, and the pressure strip is fixedly connected in the lifting groove and is elastic.

[0009] By adopting the above technical solution, the ink at the elastic bundle opening is prevented from dripping naturally.

[0010] The present invention is further configured such that an ink tank filled with ink is provided between the heating wire and the lifting tank.

[0011] By adopting the above technical solution, the ink in the ink tank is heated by the electric heating wire to generate a small air cavity so that the pressure in the ink tank changes to realize inkjet.

[0012] The present invention is further configured such that both ends of the rotating plate are fixedly connected with rotating shafts of the same diameter, the fixed platform is provided with a first limiting plate, a second limiting plate, a third limiting plate, and a fourth limiting plate facing each other, and the rotating shaft is rotatably arranged between the first limiting plate, the second limiting plate, the third limiting plate, and the fourth limiting plate.

[0013] By adopting the above technical solution, the rotating plate can be turned over by rotating around the rotating shaft, so that after the telescopic box is extended, the clean cleaning cotton faces upward and is staggered with the cleaning chamber in the horizontal direction.

[0014] The present invention is further configured such that the first limiting plate and the second limiting plate are arranged to be inclined in opposite directions, and the spacing between the ends is smaller than the diameter of the rotating shaft, the third limiting plate is parallel to the top surface of the telescopic box, and the bottom surface is tangent to the annular surface of the rotating shaft, and the fourth limiting plate is parallel to the second limiting plate.

[0015] By adopting the above technical solution, it is effectively prevented that the cleaning cotton on the rotating plate is turned over or bent when the rotating plate is subjected to vertical downward pressure.

[0016] The present invention is further configured such that two limit blocks are fixedly connected inside the chassis, the bottom surfaces of the two limit blocks are respectively in contact with the two sides of the top surface of the rotating plate, a drive shaft is rotatably connected between the two limit blocks, a drive gear is coaxially connected to the drive shaft, and the drive shaft is connected to a drive motor through a transmission assembly.

[0017] By adopting the above technical solution, when the telescopic box is extended and the rotating plate is not completely separated from the limit block, the limit block plays a role in limiting the rotation of the rotating plate.

[0018] The present invention is further configured such that the telescopic box is provided with an elastic sheet groove at a position away from the fixed platform, an elastic sheet is fixedly connected in the elastic sheet groove, and the distance between the elastic sheet and the fixed platform is less than the length of the rotating plate.

[0019] By adopting the above technical solution, the elastic potential energy accumulated when the spring piece is compressed is utilized to enable the rotating plate to rotate around the rotating shaft after being released from the limit of the limit block.

[0020] The present invention is further configured such that a vibration plate is provided in the cleaning chamber.

[0021] By adopting the above technical solution, the liquid in the cleaning chamber is vibrated at a high frequency by using a vibration plate, thereby efficiently cleaning the nozzles of the inkjet head that has not been used for a long time.

[0022] The present invention is further configured such that the rotating plate can cover the top surface of the cleaning chamber, and the cleaning cotton can completely enter the cleaning chamber.

[0023] By adopting the above technical solution, the rotating plate plays a role of closing the cleaning chamber after covering the cleaning chamber, and the cleaning cotton on the bottom of the rotating plate is placed in the cleaning chamber. After the telescopic box is retracted into the chassis, the cleaning cotton is cleaned.

[0024] The present invention is further configured such that a three-degree-of-freedom moving stage is provided on the chassis, and the position of the inkjet head is controlled by the three-degree-of-freedom moving stage.

[0025] By adopting the above technical solution, the spatial position of the inkjet head is controlled by a three-degree-of-freedom translation stage.

[0026] In summary, the present invention mainly has the following beneficial effects:

[0027] 1. The present invention arranges a telescopic box in the chassis, and arranges a cleaning chamber for cleaning the inkjet head in the telescopic box, and covers the cleaning chamber with a rotating sheet with cleaning cotton on both sides. After the inkjet head is cleaned in the cleaning chamber, it is wiped on the surface of the cleaning cotton, so that the nozzle of the inkjet head is effectively cleaned to avoid poor ink ejection at the nozzle of the inkjet head;

[0028] 2. The present invention provides a rotating shaft structure that can be rotatably connected to the telescopic box at both ends of the rotating plate. After the telescopic box is retracted into the chassis, the rotating plate can also be retracted into the chassis by the driving structure, and in the next process of extending the telescopic box, the rotating plate can be rotated and opened by the elastic action of the elastic component, so that the cleaning cotton on the rotating plate can also be placed in the cleaning chamber for cleaning after the telescopic box is retracted into the chassis, which is convenient for wiping the inkjet head next time, and the cleanliness of the cleaning cotton stored in the cleaning chamber can also be effectively guaranteed;

[0029] 3. The present invention provides a limiting structure that cannot be compressed and deformed on the fixed platform. After the rotating shaft of the rotating plate is limited by the limiting structure, the vertical force that the rotating plate can withstand can be effectively increased, thereby preventing the rotating plate from being bent when the inkjet head is wiping on the cleaning cotton.

[0030] 4. The present invention sets a lifting groove below each electric heating wire at the nozzle, and slides a lifting column in the lifting groove, and uses the deformation of the pressure strip to control the extension and contraction of the lifting column. During each inkjet process, the lifting column is extended to squeeze the elastic bundle opening, and the ink droplets are sprayed while scraping the inner wall of the elastic bundle opening, which can effectively prevent the ink droplets from solidifying at the inkjet opening and reducing the smoothness of inkjet. When the inkjet head is cleaned in the cleaning chamber, multiple inkjet operations at the inkjet opening can further improve the cleaning effect of the elastic bundle opening.

[0031] 5. The present invention generates negative pressure through the elastic bundle mouth to prevent the ink in the ink tank from directly flowing out. During the inkjet process, the lifting column can stretch to deform the elastic bundle mouth, and a vertical downward ink channel is formed at the nozzle. When the ink is sprayed, a single liquid bead is formed. When a trailing liquid bead is about to be formed, the lifting column moves upward due to the elastic reset of the pressure strip. The negative pressure generated by the contraction of the elastic bundle mouth causes the trailing liquid bead to be sucked back, effectively preventing the trailing liquid bead from dripping, thereby further improving the quality of inkjet printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A perspective view of the present invention;

[0033] Figure 2 It is a three-dimensional diagram of the internal structure of the present invention;

[0034] Figure 3 For the present invention Figure 2 A magnified view of middle;

[0035] Figure 4 It is a three-dimensional diagram of the telescopic box of the present invention being extended and the rotating piece not being rotated;

[0036] Figure 5 For the present invention Figure 4 Enlarged view of middle B;

[0037] Figure 6 It is a three-dimensional diagram of the telescopic box of the present invention being extended and the rotating piece being rotated;

[0038] Figure 7 For the present invention Figure 6 Enlarged view of middle C;

[0039] Figure 8 is a three-dimensional diagram of an inkjet head of the present invention;

[0040] Fig. 9It is a schematic cross-sectional view of the nozzle position of the inkjet head of the present invention;

[0041] Fig.10 This is a cross-sectional schematic diagram of the nozzle position of the inkjet head from another perspective of the present invention.

[0042] In the figure: 1. chassis; 2. inkjet head; 201. nozzle; 202. ink tank; 203. lifting tank; 3. telescopic box; 301. cleaning chamber; 302. fixed table; 303. first limit plate; 304. second limit plate; 305. third limit plate; 306. fourth limit plate; 307. spring clip slot; 4. rotating plate; 401. rotating shaft; 402. toothed belt; 5. cleaning cotton; 6. spring clip; 7. limit block; 8. driving shaft; 9. driving gear; 10. vibration plate; 11. heating wire; 12. pressure strip; 13. lifting column; 14. elastic band mouth; 15. chassis cover; 16. bearing platform; 17. three-degree-of-freedom moving stage. DETAILED DESCRIPTION

[0043] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0044] The following describes an embodiment of the present invention based on its overall structure.

[0045] Embodiment 1

[0046] An automatic inkjet printing device, such as Figure 1-10 As shown, it includes a chassis 1 and an inkjet head 2, a carrying platform 16 and a chassis cover 15 are provided on the chassis 1, a telescopic box 3 controlled by a telescopic component is installed in the chassis 1, specifically, a hydraulic rod, a gas rod, an electric telescopic rod and other telescopic components can be installed in the chassis 1 to control the telescopic movement of the telescopic box 3, in this embodiment, an electric telescopic rod is specifically used to control the telescopic movement of the telescopic box 3, a cleaning chamber 301 for cleaning the inkjet head 2 is provided in the telescopic box 3, and fixed tables 302 are fixedly connected on both sides of the end, the fixed tables 302 are provided with a plurality of sets of limiting structures facing each other, and a rotating plate 4 is rotatably connected between the limiting structures, specifically, the limiting structure is used to limit the rotation axis 401 of the rotating plate 4 from sliding in the direction of extending the telescopic box 3, and the rotating plate 4 can slide in the direction of retracting the telescopic box 3.

[0047] Furthermore, the top and bottom surfaces of the rotating plate 4 are connected to cleaning cotton 5, and toothed belts 402 are provided on both sides. A driving gear 9 for meshing with the toothed belt 402 is provided in the chassis 1. Specifically, the driving gear 9 is coaxially connected to the driving shaft 8, and the driving shaft 8 is rotatably connected to the limit block 7. A driving motor for driving the driving gear 9 to rotate is provided in the chassis 1. The driving motor transmits power to the driving shaft 8 through a transmission belt. The rotation of the driving gear 9 is used to make the rotating plate 4 slide in the direction of retracting the telescopic box 3. During the sliding process of the rotating plate 4, the elastic component will be compressed to accumulate elastic potential energy.

[0048] See also Figure 9-10 The inkjet head 2 is provided with a plurality of nozzles 201, in which heating wires 11 are arranged at intervals, and an ink tank 202 filled with ink is provided between the heating wires 11 and the lifting tank 203. The ink in the ink tank 202 is heated by the heating wires 11 to generate a small air cavity so that the pressure in the ink tank 202 changes to realize inkjet. The nozzle 201 is provided with a lifting tank 203 below the heating wire 11, and a hollow lifting column 13 is slidably connected in the lifting tank 203. The nozzle 201 is fixedly connected with an elastic tie port 14 at the bottom end of each lifting column 13, and the inner wall diameter of the elastic tie port 14 is the same as the outer wall diameter of the lifting column 13, and the bottom end is an inverted cone tie port structure. The elastic tie port 14 can prevent the ink from dripping naturally due to its own gravity, and the top of the lifting column 13 is slidably connected to the pressure column 13. The pressure strip 12 contacts the lifting column 13, and the pressure strip 12 is fixedly connected in the lifting groove 203 and is elastic. Each electric heating wire 11 of the nozzle 201 instantly heats the nearby ink to generate a small air cavity in the ink groove 202. The ink pressure below the electric heating wire 11 increases to squeeze and deform the pressure strip 12, and at the same time, it is sprayed out through the lifting column 13. The squeezed and deformed pressure strip 12 pushes the lifting column 13 to move downward, and the bottom end of the lifting column 13 scratches the inner wall of the elastic bundle opening 14 to prevent ink from accumulating on the inner wall of the elastic bundle opening 14. At the same time, the ink is sprayed out in a vertical channel, which effectively reduces the generation of tail ink droplets. After the pressure in the ink groove 202 is restored, the pressure strip 12 is restored by its own elastic force, the lifting column 13 rises and resets, and at the same time, the elastic bundle opening 14 returns to its original state, keeping the ink at the elastic bundle opening 14 from dripping naturally.

[0049] See also Figure 2-7 Both ends of the rotating plate 4 are fixedly connected with a rotating shaft 401 with the same diameter, and the fixed platform 302 is provided with a first limiting piece 303, a second limiting piece 304, a third limiting piece 305, and a fourth limiting piece 306 facing each other. The rotating shaft 401 is rotatably arranged between the first limiting piece 303, the second limiting piece 304, the third limiting piece 305, and the fourth limiting piece 306, so that the rotating plate 4 can be rotated and turned over with the rotating shaft 401 as the axis, so that the clean cleaning cotton 5 is facing upward after the telescopic box 3 is extended and is staggered with the cleaning bin 301 in the horizontal direction.

[0050] See also Figure 2-7There are two limit blocks 7 fixedly connected in the chassis 1, and the bottom surfaces of the two limit blocks 7 are respectively in contact with the two sides of the top surface of the rotating plate 4, and a driving shaft 8 is rotatably connected between the two limit blocks 7. A driving gear 9 is coaxially connected to the driving shaft 8, and the driving shaft 8 is connected to a driving motor through a transmission assembly. When the limit blocks 7 are in the process of extending the telescopic box 3 and the rotating plate 4 is not completely separated from the limit blocks 7, the rotation of the rotating plate 4 is restricted. At the same time, when the rotating plate 4 is driven by the driving gear 9 to slide in the contraction direction of the telescopic box 3, the rotating plate 4 is close to the top surface of the telescopic box 3, so that the rotating plate 4 covers the cleaning bin 301 tightly.

[0051] See also Figure 2-7 The telescopic box 3 is provided with a spring plate groove 307 at a position away from the fixed platform 302, and the spring plate 6 is fixedly connected in the spring plate groove 307. The distance between the spring plate 6 and the fixed platform 302 is less than the length of the rotating plate 4. The elastic potential energy accumulated when the spring plate 6 is compressed enables the rotating plate 4 to rotate around the rotating shaft 401 after breaking away from the limit of the limit block 7. Specifically, after the rotating plate 4 breaks away from the contact with the limit block 7, it rotates due to the oblique force of the spring plate 6. The elastic force generated by the spring plate 6 can be decomposed into two forces, one vertically upward and one horizontally toward the extension direction of the telescopic box 3. The vertically upward force can push the rotating plate 4 to rotate and open, while the horizontal force is offset by the limit reaction force of the first limit plate 303 and the second limit plate 304, thereby enabling the rotating plate 4 to rotate around its own rotating shaft 401. After the rotating angle of the rotating plate 4 exceeds ninety degrees, it can continue to flip downward due to its own gravity until it flips a total of one hundred and eighty degrees.

[0052] See also Figure 2-5 The rotating plate 4 can cover the top surface of the cleaning chamber 301, and the cleaning cotton 5 can completely enter the cleaning chamber 301, so that the rotating plate 4 plays a role of closing the cleaning chamber 301 after covering the cleaning chamber 301, and the cleaning cotton 5 on the bottom surface of the rotating plate 4 is placed in the cleaning chamber 301. After the telescopic box 3 is retracted into the chassis 1, the cleaning cotton 5 is cleaned, so that the cleaning cotton 5 facing upward when the telescopic box 3 is extended next time remains in a clean state. A three-degree-of-freedom shifting stage 17 is provided on the chassis 1. Specifically, the three degrees of freedom are the horizontal direction, the longitudinal direction, and the vertical direction. The three-degree-of-freedom shifting stage 17 is not improved in this application and will not be elaborated here. The position of the inkjet head 2 is controlled by the three-degree-of-freedom shifting stage 17, and the spatial position of the inkjet head 2 is controlled by the three-degree-of-freedom shifting stage 17.

[0053] Embodiment 2

[0054] An automatic inkjet printing device, such as Figure 1-10As shown, on the basis of the first embodiment, the difference from the first embodiment is that the first limiting piece 303 and the second limiting piece 304 are arranged in an oppositely inclined manner, and the distance between the ends is smaller than the diameter of the shaft 401, the third limiting piece 305 is parallel to the top surface of the telescopic box 3, and the bottom surface is tangent to the annular surface of the shaft 401, and the fourth limiting piece 306 is parallel to the second limiting piece 304, so that the shaft 401 can pass through the first limiting piece 303 and the second limiting piece 304 in the contraction direction of the telescopic box 3 without The extension direction of the normal telescopic box 3 is through the first limit plate 303 and the second limit plate 304, and the fourth limit plate 306 is the same. The third limit plate 305 prevents the rotating plate 4 from flipping over due to vertical pressure, with the line contact between the rotating plate 4 and the edge of the telescopic box 3, and the line contact between the rotating shaft 401 and the bottom surface of the third limit plate 305 as two force points, which effectively prevents the cleaning cotton 5 on the rotating plate 4 from flipping over or bending when the rotating plate 4 is subjected to vertical downward pressure.

[0055] See also Figure 5 A vibration plate 10 is arranged in the cleaning chamber 301. The vibration plate 10 specifically adopts at least one or more piezoelectric ceramic vibration plates. Specifically, after the bottom end of the inkjet head 2 is immersed in the cleaning liquid in the cleaning chamber 301, the vibration plate 10 vibrates at a high frequency and a low amplitude. In order to further improve the cleaning quality, the inkjet head 2 can also perform inkjet several times simultaneously. After the inkjet head 2 is cleaned, the telescopic box 3 is retracted into the chassis 1. At the same time, when the rotating plate 4 slides back and covers the cleaning chamber 301, the vibration plate 10 vibrates at a low frequency and a high amplitude, so that the cleaning liquid in the cleaning chamber 301 splashes to the height of the cleaning cotton 5, and the cleaning cotton 5 is cleaned. The vibration plate 10 is used to make the liquid in the cleaning chamber 301 vibrate at a high frequency, thereby efficiently cleaning the nozzle 201 of the inkjet head 2 that has not been used for a long time.

[0056] The working principle of the present invention is:

[0057] When the inkjet head 2 of the printing device has difficulty in jetting ink, the telescopic component in the chassis 1 controls the telescopic box 3 to extend. During the extension of the telescopic box 3, the limit block 7 contacts the top surface of the side of the rotating plate 4, and continuously limits the rotation of the rotating plate 4 until the rotating plate 4 is out of contact with the limit block 7. After the rotating plate 4 is rotated 180 degrees under the elastic potential energy accumulated by the spring 6, the clean cleaning cotton 5 on the rotating plate 4 is directed upward, and the cleaning chamber 301 is opened at the same time. The inkjet head 2 first extends into the cleaning chamber 301 under the movement of the three-degree-of-freedom moving stage 17, and is cleaned under the vibration of the vibration plate 10, so that impurities in the elastic bundle 14 and the lifting column 13 that cause the inkjet to be difficult to jet are separated from the inkjet head 2. After the inkjet head 2 is cleaned in the cleaning chamber 301, the three-degree-of-freedom moving stage 17 controls the inkjet head 2 to move above the cleaning cotton 5, wipes the bottom surface of the inkjet head 2, and completes further cleaning work, so that the inkjet head 2 can continue to jet ink smoothly and perform high-quality inkjet printing.

[0058] After the inkjet head 2 leaves, the telescopic assembly in the chassis 1 controls the telescopic box 3 to retract. When the toothed belt 402 on the rotating plate 4 and the driving gear 9 are in contact and mesh with each other, the limit block 7 presses the edge of the top surface of the rotating plate 4. As the driving gear 9 rotates, the rotating plate 4 slides and retracts in the direction of the retraction of the telescopic box 3. The rotating shaft 401 originally located between the first limit plate 303, the second limit plate 304, the third limit plate 305, and the fourth limit plate 306 presses the fourth limit plate 306 and then moves toward the direction of the spring plate 6 until another rotating shaft 401 presses the first limit plate 303 and the second limit plate 304. When it reaches between the first limit plate 303, the second limit plate 304, the third limit plate 305 and the fourth limit plate 306, the driving gear 9 can stop rotating. During this process, the rotating plate 4 presses down the spring in the spring slot 307 to accumulate elastic potential energy for the next flip of the rotating plate 4. The rotating plate 4 covering the cleaning chamber 301 plays the role of closing the cleaning chamber 301, and the cleaning cotton 5 on the bottom of the rotating plate 4 is located in the cleaning chamber 301 at this time. The vibrating plate 10 vibrates to clean the cleaning cotton 5. After cleaning, the clean cleaning cotton 5 is located in the cleaning chamber 301 to be used for wiping the inkjet head 2 next time.

[0059] Although an embodiment of the present invention has been shown and described, this specific embodiment is only an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An inkjet automatic printing device, comprising a housing (1) and an inkjet head (2), characterized in that: A telescopic box (3) which is controlled to be telescopic by a telescopic assembly is installed in the chassis (1); a cleaning chamber (301) for cleaning the inkjet head (2) is arranged in the telescopic box (3); and fixed platforms (302) are fixedly connected to both sides of the end; the fixed platforms (302) are provided with a plurality of sets of limiting structures facing each other, and a rotating plate (4) is rotatably connected between the limiting structures; the rotating plate (4) is capable of sliding in the direction of retraction of the telescopic box (3); and the top and bottom surfaces of the rotating plate (4) are both connected to cleaning plates. Cotton (5), and toothed belts (402) are arranged on both sides, a driving gear (9) for meshing with the toothed belt (402) is arranged in the chassis (1), and the driving gear (9) is rotated to make the rotating plate (4) slide in the direction of retracting the telescopic box (3), and the elastic component is compressed during the sliding process of the rotating plate (4) to accumulate elastic potential energy, and a plurality of nozzles (201) are arranged on the inkjet head (2), and electric heating wires (11) are arranged at intervals in the nozzles (201). (201) A lifting groove (203) is provided below the electric heating wire (11), a hollow lifting column (13) is slidably connected in the lifting groove (203), the nozzle (201) is fixedly connected to an elastic constriction (14) at the bottom end of each lifting column (13), the inner wall diameter of the elastic constriction (14) is the same as the outer wall diameter of the lifting column (13), and the bottom end is an inverted cone constriction structure, the top end of the lifting column (13) is in contact with the pressure strip (12), and the pressure strip (12) is fixed The rotating plate (4) is connected to the lifting groove (203) and has elasticity. Both ends of the rotating plate (4) are fixedly connected to a rotating shaft (401) with the same diameter. The fixed platform (302) is provided with a first limiting piece (303), a second limiting piece (304), a third limiting piece (305), and a fourth limiting piece (306) facing each other. The rotating shaft (401) is rotatably arranged between the first limiting piece (303), the second limiting piece (304), the third limiting piece (305), and the fourth limiting piece (306).

2. The automatic inkjet printing device according to claim 1, characterized in that: An ink tank (202) filled with ink is provided between the heating wire (11) and the lifting tank (203).

3. The automatic inkjet printing device according to claim 1, characterized in that: The first limiting piece (303) and the second limiting piece (304) are arranged to be tilted in opposite directions, and the distance between the ends is smaller than the diameter of the rotating shaft (401); the third limiting piece (305) is parallel to the top surface of the telescopic box (3), and the bottom surface is tangent to the annular surface of the rotating shaft (401); and the fourth limiting piece (306) is parallel to the second limiting piece (304).

4. The automatic inkjet printing device according to claim 1, characterized in that: Two limit blocks (7) are fixedly connected inside the chassis (1), the bottom surfaces of the two limit blocks (7) are in contact with the two sides of the top surface of the rotating plate (4) respectively, a driving shaft (8) is rotatably connected between the two limit blocks (7), a driving gear (9) is coaxially connected to the driving shaft (8), and the driving shaft (8) is connected to a driving motor via a transmission assembly.

5. The automatic inkjet printing device according to claim 1, characterized in that: The telescopic box (3) is provided with a spring plate slot (307) at a position away from the fixed platform (302), a spring plate (6) is fixedly connected in the spring plate slot (307), and the distance between the spring plate (6) and the fixed platform (302) is less than the length of the rotating plate (4).

6. The automatic inkjet printing device according to claim 1, characterized in that: A vibration sheet (10) is arranged in the cleaning chamber (301).

7. The automatic inkjet printing device according to claim 1, characterized in that: The rotating plate (4) can cover the top surface of the cleaning chamber (301), and the cleaning cotton (5) can completely enter the cleaning chamber (301).

8. The automatic inkjet printing device according to claim 1, characterized in that: A three-degree-of-freedom moving platform (17) is arranged on the chassis (1), and the position of the inkjet head (2) is controlled by the three-degree-of-freedom moving platform (17).

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