An ink stack device and an inkjet printer

Abstract

The utility model belongs to the technical field of printing head maintenance, solve the deficiency that printing head of prior art is easy to dry and block, provide ink stack device and ink jet printer. Ink stack device includes: ink stack mechanism, including ink stack body, ink stack body is used for to print the moisturizing of printing head on trolley, is equipped with UV device on printing trolley, cover plate mechanism, including cover plate and displacement assembly, when ink stack mechanism enters the working condition, displacement assembly drives cover plate to move away from its initial displacement and thereby exposes ink stack body, when ink stack mechanism enters the non - working condition, displacement assembly drives cover plate to return its initial displacement and thereby covers ink stack body, cover plate blocks the UV light that UV device's UV lamp sent to make ink stack body not be irradiated by UV light. The utility model provides ink stack device and ink jet printer have the advantage that can avoid printing head dry and block.

Description

Technical Field

[0001] This utility model relates to the field of printhead maintenance technology, and in particular to an ink stack device and an inkjet printer. Background Technology

[0002] Inkjet printers have extremely fine printheads. During daily use, after printing, the printheads need to be cleaned and moisturized in a timely manner to prevent residual ink from solidifying on the printhead surface and causing blockages.

[0003] In existing technology, inkjet printers are often equipped with an ink stack device that cleans and moisturizes the printhead. This ink stack device mainly includes a base located directly below the initial zero position of the printhead, a scraper mounted on the base, a movable seat movably mounted on the base, an ink stack assembly assembled on the movable seat, and a power module for driving the movable seat to move back and forth relative to the printhead. After the inkjet printer completes printing, the print carriage moves the printhead back and stops at the initial zero position. At this time, through program control, the power module drives the movable seat to rise to a height position at a suitable distance from the printhead. Then, the scraper cleans the printhead to remove any residual ink, and the ink stack assembly on the movable seat moisturizes the printhead to prevent it from drying out and clogging.

[0004] However, existing inkjet printers often have UV devices installed on the upstream and downstream sides of the printing carriage in the direction of movement. As a result, the UV light emitted by the UV device can easily shine on the ink stack of the ink stack, causing the ink on the surface of the ink stack to solidify. This can lead to blockage of the ink stack, making the print head prone to drying and clogging. In addition, if the UV light can also shine on the doctor blade of the ink stack, it can easily cause the ink on the doctor blade to solidify, which can then damage the print head.

[0005] Therefore, there is an urgent need to provide an ink stack device and inkjet printer that can prevent printhead drying and clogging. Utility Model Content

[0006] This invention addresses the shortcomings of existing technologies, such as the printhead's tendency to dry out and clog. To achieve one objective, it provides an ink stack device, comprising: an ink stack mechanism including an ink stack body for moisturizing the printhead on a printing carriage; and a cover plate mechanism including a cover plate and a displacement component. When the ink stack mechanism is in operation, the displacement component drives the cover plate to move away from its initial position, thereby exposing the ink stack body. When the ink stack mechanism is in a non-operating state, the displacement component drives the cover plate to move back to its initial position, thereby covering the ink stack body. The cover plate blocks the UV light emitted by the UV lamp of the UV device, preventing the ink stack body from being irradiated by UV light.

[0007] Furthermore, the ink stack mechanism also includes a scraper and a drive assembly. The scraper is used to clean residual ink on the print head. When the ink stack mechanism is in working condition, the displacement assembly drives the cover plate to move, thereby exposing the scraper. The drive assembly drives the scraper to rotate until it protrudes beyond the plane of the cover plate, so that the scraper interferes with the print head. When the ink stack mechanism is not in working condition, the drive assembly drives the scraper to rotate in the opposite direction until it is below the plane of the cover plate. The displacement assembly drives the cover plate to move, thereby covering the scraper.

[0008] Furthermore, the displacement component includes a push-pull rod, a pair of guide rods, and a telescopic motor. The push-pull rod is fixedly connected to the cover plate. When the ink stack mechanism is in a non-working state, the telescopic motor drives the push-pull rod to move the cover plate under the guidance of the guide rods to cover the ink stack body and the doctor blade. When the ink stack mechanism is in a working state, the telescopic motor drives the push-pull rod to move the cover plate under the guidance of the guide rods to expose the ink stack body and the doctor blade.

[0009] Furthermore, the drive assembly includes a drive cylinder, a transmission plate, and a rotating shaft. The scraper is fixedly connected to the rotating shaft, which is rotatably mounted in the ink stack mechanism. The transmission plate is connected to both the drive cylinder and the rotating shaft. The piston rod of the drive cylinder drives the transmission plate through a contraction motion, thereby causing the scraper to rotate forward or in reverse.

[0010] Furthermore, the ink stack mechanism also includes an ink stack housing. The ink stack body includes an ink pad, an ink stack support plate extending protruding from the side of the ink pad, and an ink stack support portion disposed on the ink stack support plate. The ink pad is used to abut against the print head to keep it moist. At least one pair of inclined grooves are symmetrically provided on a pair of sides of the ink stack housing. At least one pair of sliding posts are symmetrically fixed on a pair of sides of the ink stack body. The sliding posts are slidably connected to the corresponding inclined grooves. When the exposed ink stack support portion is subjected to the pushing force of the print carriage, the ink stack body in its original position slides upward relative to the ink stack housing and moves obliquely upward along the direction of abutting against the print head until the ink pad abuts against the print head. When the exposed ink stack support portion is no longer subjected to the pushing force of the print carriage, the ink stack body slides downward relative to the ink stack housing and moves obliquely downward away from the print head until the ink pad disengages from the print head. The ink stack body is then covered by a cover plate driven by a displacement component.

[0011] Furthermore, the sloping groove is set as an inclined strip groove. After the force-bearing part of the ink stack is no longer subjected to the pushing force, the ink stack body returns to its original position under its own weight.

[0012] Furthermore, the inclined groove is configured to include connected inclined strip grooves and parallel grooves. The ink stack mechanism also includes a return spring located in the ink stack housing. The two ends of the return spring are connected to the ink stack housing and the ink stack body, respectively. After the force-bearing part of the ink stack is no longer subjected to the pushing force, the ink stack body returns to its original position from the parallel groove and then through the inclined strip groove under the combined action of its own weight and the elastic restoring force of the return spring.

[0013] Furthermore, the stress-bearing parts of the ink stack are made of bolts, balls, or rollers.

[0014] Furthermore, two pairs of inclined grooves are symmetrically provided on a pair of sides of the ink stack housing, and two pairs of sliding pillars are symmetrically fixed on a pair of sides of the ink stack body. The sliding pillars and the inclined grooves are configured in pairs, and each pair of inclined grooves and each pair of sliding pillars have a symmetrical center plane that coincides, and the extension direction of the symmetrical center plane is parallel to the movement direction of the printing carriage.

[0015] To achieve another objective of this utility model, an inkjet printer is provided, comprising: a body, an inkjet unit, a curing unit, and any one of the above-mentioned ink stack devices. The body includes a frame and a housing mounted on the frame. The inkjet unit, curing unit, and ink stack device are all supported by the frame. The inkjet unit includes a carriage, a print carriage, and a print head. The print carriage reciprocates on the carriage. The print head for jetting ink is mounted on the print carriage. The curing unit includes a UV lamp disposed on at least one side of the print carriage in the reciprocating direction. The UV lamp irradiates the ink to cure it. A cover plate mechanism is disposed at one end adjacent to the carriage, and the moving direction of the cover plate is perpendicular to the reciprocating direction of the print carriage. The UV device is movably located between the print carriage and one end of the carriage. A pressure plate is provided on the UV device for applying a pushing force to the ink stack force-bearing part of the ink stack.

[0016] The beneficial effects of this utility model are as follows: The ink stack device and inkjet printer provided by this utility model drive the cover plate to move relative to the ink stack body through the displacement component of the cover plate mechanism. So when the ink stack mechanism is not working, the cover plate can cover the ink stack body, and when the ink stack mechanism is working, the cover plate moves away to expose the ink stack body. Thus, when the UV device is working, that is, when the inkjet printing operation is performed and the ink stack mechanism is not working, the UV light emitted by the UV lamp of the UV device can be prevented from shining on the ink stack body, preventing the ink on the surface of the ink stack body from solidifying, avoiding the ink stack body from becoming blocked, and ensuring that the print head does not dry out and become blocked. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this utility model.

[0018] Figure 1 This is a schematic diagram of the overall structure of an inkjet printer provided in an embodiment of the present utility model; Figure 2 A schematic diagram of the internal structure of an inkjet printer provided in an embodiment of the present invention, viewed from a top-down direction. Figure 3 A schematic diagram of the internal structure of an inkjet printer provided in an embodiment of the present invention, viewed from a low angle. Figure 4 A schematic diagram of the ink stack mechanism of the ink stack device provided in this embodiment of the utility model from one side view. Figure 5 A schematic diagram of the ink stack mechanism of the ink stack device provided in an embodiment of this utility model from another side view. Figure 6 A schematic diagram of the inkjet printer's inkjet device and curing device provided in an embodiment of this utility model; Figure 7 A simplified structural diagram showing the relative position of the ink stack mechanism to the printing carriage when it is in a non-working state, as provided in this embodiment of the utility model. Figure 8 A simplified structural diagram showing the relative position of the ink stack mechanism with the printing carriage when it is in operation, as provided in this embodiment of the utility model. Figure 9 A schematic diagram of another specific embodiment of the inclined groove of the ink stack mechanism of the ink stack device provided in this utility model embodiment; Explanation of reference numerals in the attached figures: 1. Ink stack device; 11. Ink stack mechanism; 111. Ink stack body; 1111. Ink pad; 1112. Ink stack bearing plate; 1113. Ink stack bearing part; 112. Ink stack shell; 113. Inclined groove; 114. Sliding column; 115. Return spring; 12. Cover plate mechanism; 121. Cover plate; 122. Displacement component; 1221. Push-pull rod; 1222. Guide rod; 1223. Telescopic motor; 13. Doctor blade; 14. Drive component; 141. Drive cylinder; 1411. Piston rod; 142. Transmission plate; 143. Rotating shaft; 2. Machine body; 21. Frame; 22. Shell; 3. Inkjet unit; 31. Carriage; 32. Printing carriage; 33. Printing nozzle; 4. Curing unit; 41. UV lamp; 42. Push plate. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. 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 entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. 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 a process, method, article, or apparatus. Without further limitation, an element limited by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, embodiments of the present invention and the various features thereof can be combined with each other, all within the protection scope of the present invention.

[0020] Refer to Figure 1 to Figure 8 As an objective of this utility model, an ink stack device 1 is provided, which includes an ink stack mechanism 11 and a cover plate mechanism 12. The ink stack mechanism 11 includes an ink stack body 111, which specifically utilizes an ink pad 1111 to moisturize the print head 33 on the printing carriage 32. The printing carriage 32 is equipped with a UV device. The cover plate mechanism 12 includes a cover plate 121 and a displacement assembly 122, such as... Figure 8 As shown, when the ink stack mechanism 11 enters the working state, the displacement component 122 drives the cover plate 121 to move away from its initial position, thereby exposing the ink stack body 111, as... Figure 7 As shown, when the ink stack mechanism 11 enters the non-working state, the displacement component 122 drives the cover plate 121 to move back to its initial position, thereby covering the ink stack body 111. The cover plate 121 blocks the UV light emitted by the UV lamp 41 of the UV device so that the ink stack body 111 is not irradiated by UV light. In addition, the structure of the ink stack device 1, such as the ink pump, is conventional technology in the art and will not be described in detail here.

[0021] The ink stack device 1 provided by this utility model drives the cover plate 121 to move relative to the ink stack body 111 through the displacement component 122 of the cover plate mechanism 12. Thus, when the ink stack mechanism 11 is not working, the cover plate 121 can cover the ink stack body 111, and when the ink stack mechanism 11 is working, the cover plate 121 moves away to expose the ink stack body 111. Thus, when the UV device is working, that is, when the inkjet printing operation is performed and the ink stack mechanism 11 is not working, the UV light emitted by the UV lamp 41 of the UV device can be prevented from shining on the ink stack body 111, preventing the ink on the surface of the ink stack body 111 from solidifying, preventing the ink stack body 111 from becoming blocked, and ensuring that the print head 33 will not dry out and become blocked.

[0022] Please refer to the reference. Figure 4 and Figure 5 Preferably, the ink stack mechanism 11 further includes a scraper 13 and a drive assembly 14. The scraper 13 is used to clean residual ink on the print head 33. When the ink stack mechanism 11 is in working condition, the displacement assembly 122 drives the cover plate 121 to move, thereby exposing the scraper 13. The drive assembly 14 drives the scraper 13 to rotate until its tip protrudes beyond the plane of the cover plate 121, so that the scraper 13, especially its tip, interferes with the print head 33 to scrape off the residual ink attached to the print head 33. When the ink stack mechanism 11 is not in working condition, the drive assembly 14 drives the scraper 13 to rotate in the opposite direction until it is below the plane of the cover plate 121. The displacement assembly 122 drives the cover plate 121 to move, thereby covering the scraper 13. In this way, when the UV device is working and the ink stack mechanism 11 is not working, the cover plate 121 can block UV light from shining on the doctor blade 13, preventing the ink on the doctor blade 13 from solidifying, thereby preventing the doctor blade 13 from damaging the print head 33 in the future.

[0023] Please refer to the reference. Figure 3 Specifically, the displacement assembly 122 includes a push-pull rod 1221, a pair of guide rods 1222, and a telescopic motor 1223. The push-pull rod 1221 is fixedly connected to the cover plate 121. When the ink stack mechanism 11 is in a non-working state, the telescopic motor 1223 drives the push-pull rod 1221 to move the cover plate 121 under the guidance of the guide rods 1222 to cover the ink stack body 111 and the doctor blade 13. When the ink stack mechanism 11 is in a working state, the telescopic motor 1223 drives the push-pull rod 1221 to move the cover plate 121 under the guidance of the guide rods 1222 to expose the ink stack body 111 and the doctor blade 13. In this way, the displacement assembly 122 can reliably move the cover plate 121, ensuring accurate positioning of the cover plate 121 and reliably protecting the ink stack body 111 and the doctor blade 13 from UV light irradiation.

[0024] Please refer to the reference. Figure 4 and Figure 5Specifically, the drive assembly 14 includes a drive cylinder 141, a transmission plate 142, and a rotating shaft 143. The doctor blade 13 is fixedly connected to the rotating shaft 143, which is rotatably mounted in the ink stack mechanism 11. The transmission plate 142 is connected to both the drive cylinder 141 and the rotating shaft 143. The piston rod 1411 of the drive cylinder 141 drives the transmission plate 142 through a contraction motion, thereby causing the doctor blade 13 to rotate forward or in reverse. Because the drive assembly 14 is not only compact in structure but also has high transmission precision, the forward or reverse rotation of the doctor blade 13 can be reliably completed, ensuring that the doctor blade 13 can reliably scrape the print head 33 and accurately return to the plane of the cover plate 121 to avoid the adverse situation of the doctor blade 13 colliding with the cover plate 121.

[0025] Please refer to the reference. Figure 4 and Figure 5 Preferably, the ink stack mechanism 11 further includes an ink stack housing 112. The ink stack body 111 includes an ink pad 1111, an ink stack force plate 1112 that extends tangentially to the side of the ink pad 1111, and an ink stack force-bearing part 1113 disposed on the ink stack force plate 1112. The ink pad 1111 is used to abut against the print head 33 to keep it moist. At least one pair of inclined grooves 113 are symmetrically provided on a pair of sides of the ink stack housing 112. At least one pair of sliding posts 114 are symmetrically fixed on a pair of sides of the ink stack body 111. The sliding posts 114 are slidably connected to the corresponding inclined grooves 113. By utilizing the sliding engagement between the sliding posts 114 and the grooves, the movement of the ink stack body 111 relative to the ink stack housing 112 is smooth and accurate.

[0026] When the ink stack mechanism 11 enters the working state, the cover plate 121 exposes the ink stack body 111 under the drive of the displacement component 122. The printing carriage 32 moves along the approach direction close to the ink stack mechanism 11. The printing carriage 32 applies a pushing force to the ink stack force-bearing part 1113, causing the ink stack body 111 in the original position to slide upward relative to the ink stack shell 112 and move obliquely upward along the line that abuts against the printing nozzle 33 until the ink pad 1111 abuts against the printing nozzle 33. In this way, the kinetic energy of the printing carriage 32 itself can be used to apply a pushing force to the ink stack force-bearing part 1113, eliminating the need for a separate power mechanism to drive the ink stack body 111 to produce the movement that abuts against the printing nozzle 33. This saves costs and simplifies the structure, and is especially beneficial for the miniaturization of the ink stack device 1 in desktop 3D inkjet printers, which are a type of inkjet printer.

[0027] When the ink stack mechanism 11 enters the non-working state, the printing carriage 32 moves away from the ink stack mechanism 11. The force-bearing part 1113 of the ink stack gradually no longer experiences the pushing force applied by the printing carriage 32, causing the ink stack body 111 to slide relative to the ink stack housing 112 and move obliquely downward away from the print head 33 until the ink pad 1111 disengages from the print head 33. The cover plate 121 then covers the ink stack body 111 under the drive of the displacement component 122. Similarly, there is no need to set up a separate power mechanism to drive the ink stack body 111 to return to its original position, thus saving costs and simplifying the structure.

[0028] Please refer to the reference. Figure 4 , Figure 5 , Figure 7 and Figure 8 Preferably, as a specific embodiment of the inclined groove 113, it is configured as an inclined strip groove. After the ink stack force-bearing part 1113 is no longer subjected to the pushing force, the ink stack body 111 returns to its original position under its own weight. When the inclined groove 113 is configured as an inclined strip groove, it requires high precision in the fit of the whole machine. If the pushing force applied by the printing carriage 32 is not in place, it may cause the ink pad 1111 and the print head 33 to not make sufficient contact. Therefore, it is particularly suitable for occasions where the travel distance of the printing carriage 32 acting on the ink stack force-bearing part 1113 is relatively long.

[0029] Please refer to the reference. Figure 9 Preferably, as another specific embodiment of the inclined groove 113, it is configured to include connected inclined strip grooves and parallel grooves. The ink stack mechanism 11 also includes a return spring 115 disposed in the ink stack housing 112. The two ends of the return spring 115 are respectively connected to the ink stack housing 112 and the ink stack body 111. After the force-bearing part 1113 of the ink stack is no longer subjected to the pushing force, the ink stack body 111 returns to its original position from the parallel groove and then through the inclined strip groove under the combined action of its own weight and the elastic restoring force of the return spring 115. When the inclined groove 113 has connected inclined strip grooves and parallel grooves, the fitting accuracy requirements of the whole machine can be reduced. As for the lack of return power of the sliding column 114 in the parallel groove, the return spring 115 can pull the ink stack body 111 downward to return to its original position.

[0030] Please refer to the reference. Figure 4 and Figure 5 Specifically, if the ink stack force-bearing part 1113 is made of bolts, it is easy to replace after long-term use and wear. If the ink stack force-bearing part 1113 is made of ball bearings or rollers, the friction and resistance between the ink stack force-bearing part 1113 and the printing carriage 32 will be reduced, and the structural life will be improved.

[0031] Please refer to the reference. Figure 4 and Figure 5Preferably, two pairs of inclined grooves 113 are symmetrically provided on a pair of sides of the ink stack housing 112, and two pairs of sliding pillars 114 are symmetrically fixed on a pair of sides of the ink stack body 111. The sliding pillars 114 and the inclined grooves 113 are configured in pairs. Each pair of inclined grooves 113 and each pair of sliding pillars 114 have a symmetrical center plane that coincides, and the extension direction of the symmetrical center plane is parallel to the moving direction of the printing carriage 32. This ensures that the ink stack body 111 can move to accurately align with the printing nozzle 33 during the process of the ink stack force-bearing part 1113 receiving the pushing force, thereby effectively ensuring the moisturizing effect on the printing nozzle 33.

[0032] Please refer to the reference. Figures 1 to 3 , Figures 6 to 8 As another objective of this utility model, this utility model also provides an inkjet printer that uses UV light to cure ink, such as a 3D inkjet printer or an inkjet flatbed printer. It includes a body 2, an inkjet device 3, a curing device 4, and an ink stack device 1 of any of the above embodiments. The body 2 includes a frame 21 and a shell 22 covering the frame 21. The shell 22 includes a rotatable cover. During printing, the cover is closed to form a sealed space to protect the user and ensure that the printing quality is not easily affected by external debris. After printing is completed, the cover is opened to facilitate the removal of the printed material. The inkjet unit 3, curing unit 4, and ink stack unit 1 are all supported by the frame 21. The inkjet unit 3 includes a frame 31, a printing carriage 32, and a print head 33. The printing carriage 32 reciprocates on the frame 31. The print head 33 for jetting ink is located on the printing carriage 32. The curing unit 4 includes a UV lamp 41 located on at least one side of the printing carriage 32 in the reciprocating direction. In this invention, a curing unit 4 is provided on each side of the printing carriage 32. The UV lamp 41 irradiates the ink to cure it. The cover plate mechanism 12 is located at one end adjacent to the frame 31, and the moving direction of the cover plate 121 is perpendicular to the reciprocating direction of the printing carriage 32. The UV device is movably located between the printing carriage 32 and one end of the frame 31. A push plate 42 is provided on the UV device for applying a pushing force to the ink stack force-bearing part 1113 of the ink stack body 111. The inkjet printer can obtain the beneficial effects brought by any of the ink stack units 1, which will not be described in detail here. Therefore, the printhead 33 of the inkjet printer will not dry out and become clogged due to UV light exposure of the ink stack 111. In addition, the printhead 33 will not be damaged by UV light exposure of the scraper 13.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An ink stack device, characterized in that, include: The ink stack mechanism includes an ink stack body, which is used to keep the print head on the printing carriage moist, and the printing carriage is equipped with a UV device. The cover plate mechanism includes a cover plate and a displacement component. When the ink stack mechanism enters the working state, the displacement component drives the cover plate to move away from its initial position to expose the ink stack body. When the ink stack mechanism enters the non-working state, the displacement component drives the cover plate to move back to its initial position to cover the ink stack body. The cover plate blocks the UV light emitted by the UV lamp of the UV device so that the ink stack body is not irradiated by UV light.

2. The ink stack device according to claim 1, characterized in that, The ink stack mechanism also includes a scraper and a drive assembly. The scraper is used to clean residual ink on the print head. When the ink stack mechanism is in operation, the displacement assembly drives the cover plate to move, thereby exposing the scraper. The drive assembly drives the scraper to rotate until it protrudes beyond the plane of the cover plate, thereby interfering with the print head. When the ink stack mechanism is not in operation, the drive assembly drives the scraper to rotate in the opposite direction until it is below the plane of the cover plate. The displacement assembly drives the cover plate to move, thereby covering the scraper.

3. The ink stack device according to claim 2, characterized in that, The displacement component includes a push-pull rod, a pair of guide rods, and a telescopic motor. The push-pull rod is fixedly connected to the cover plate. When the ink stack mechanism is in a non-working state, the telescopic motor drives the push-pull rod to move the cover plate under the guidance of the guide rods to cover the ink stack body and the scraper. When the ink stack mechanism is in a working state, the telescopic motor drives the push-pull rod to move the cover plate under the guidance of the guide rods to expose the ink stack body and the scraper.

4. The ink stack device according to claim 2, characterized in that, The drive assembly includes a drive cylinder, a transmission plate, and a rotating shaft. The scraper is fixedly connected to the rotating shaft, which is rotatably mounted in the ink stack mechanism. The transmission plate is connected to both the drive cylinder and the rotating shaft. The piston rod of the drive cylinder drives the transmission plate through a contraction motion, thereby causing the scraper to rotate forward or in reverse.

5. The ink stack device according to claim 1, characterized in that, The ink stack mechanism further includes an ink stack housing. The ink stack housing includes an ink pad, an ink stack force plate that extends protrudingly from the side of the ink pad, and an ink stack force-bearing part disposed on the ink stack force plate. The ink pad is used to abut against the print head to keep it moist. At least one pair of inclined grooves are symmetrically provided on a pair of sides of the ink stack housing. At least one pair of sliding posts are symmetrically fixed on a pair of sides of the ink stack housing. The sliding posts are slidably connected to the corresponding inclined grooves. When the exposed force-bearing part of the ink stack is subjected to the pushing force of the printing carriage, the ink stack body in the original position slides upward relative to the ink stack shell and moves obliquely upward along the line that abuts against the print head until the ink pad abuts against the print head. When the exposed force-bearing part of the ink stack is no longer subjected to the pushing force of the printing carriage, the ink stack body slides down relative to the ink stack housing and moves obliquely downward away from the print head until the ink pad disengages from the print head, and the ink stack body is covered by the cover plate driven by the displacement component.

6. The ink stack device according to claim 5, characterized in that, The inclined groove is configured as an inclined strip groove. After the force-bearing part of the ink stack is no longer subjected to the pushing force, the ink stack body returns to the original position under its own weight.

7. The ink stack device according to claim 5, characterized in that, The inclined groove is configured to include an inclined strip groove and a parallel groove connected together. The ink stack mechanism also includes a return spring disposed in the ink stack housing. The two ends of the return spring are respectively connected to the ink stack housing and the ink stack body. After the force-bearing part of the ink stack is no longer subjected to the pushing force, the ink stack body returns to the original position from the parallel groove and then through the inclined strip groove under the combined action of its own weight and the elastic restoring force of the return spring.

8. The ink stack device according to claim 5, characterized in that, The force-bearing part of the ink stack is provided by bolts, balls or rollers.

9. The ink stack device according to claim 5, characterized in that, Two pairs of inclined grooves are symmetrically provided on a pair of sides of the ink stack housing. Two pairs of sliding columns are symmetrically fixed on a pair of sides of the ink stack housing. The sliding columns and the inclined grooves are configured in pairs. Each pair of inclined grooves and each pair of sliding columns have a symmetrical center plane that coincides with each other. The extension direction of the symmetrical center plane is parallel to the movement direction of the printing carriage.

10. An inkjet printer, comprising a body, an inkjet unit, a curing unit, and an ink stack assembly as described in any one of claims 1 to 9, wherein the body comprises a frame and a housing mounted on the frame, the inkjet unit, the curing unit, and the ink stack assembly are all supported by the frame, the inkjet unit comprises a carriage, a print carriage, and a print head, the print carriage reciprocating on the carriage, the print head for jetting ink being disposed on the print carriage, the curing unit comprising a UV lamp disposed on at least one side of the print carriage in the reciprocating direction, the UV lamp irradiating the ink to cure it, a cover plate mechanism disposed adjacent to one end of the carriage, and the moving direction of the cover plate being perpendicular to the reciprocating direction of the print carriage, the UV unit being movably located between the print carriage and one end of the carriage, and a pressure plate disposed on the UV unit for applying a pushing force to the ink stack force-bearing portion of the ink stack assembly.

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