Printing head with ink suction assembly, printing device and ink suction assembly

Abstract

The utility model relates to a printing nozzle with ink suction assembly, printing equipment and ink suction assembly, printing nozzle with ink suction assembly, including nozzle body, it is equipped with injection part, injection part is equipped with a plurality of injection holes, a plurality of injection holes form injection area, ink suction assembly sets up in nozzle body, and ink suction assembly includes a plurality of first ink suction hole, at least one first ink suction cavity that communicates with a plurality of first ink suction hole, a plurality of first ink suction hole and first ink suction cavity are located at the periphery of injection area and are located at at least one side of injection area, and first ink suction cavity is communicated with first negative pressure interface. It can adsorb the non - expected ink drop or ink flow or ink mist etc. that generates in the printing nozzle working process, guarantees the reliability of printing nozzle work and improves printing quality. Ink suction assembly sets up in nozzle body, does not occupy the space of printing equipment and is convenient for ink suction operation.

Description

Technical Field

[0001] This utility model relates to the field of printing technology, and in particular to a printhead with an ink-absorbing component, a printing device, and an ink-absorbing component. Background Technology

[0002] During the inkjet printer's process of ejecting ink from the nozzles onto the printing media, if the printer is not in a stable operating state for ink ejection, unwanted ink droplets or streams may be ejected. These can adhere to the nozzle surface, causing nozzle clogging, and fall onto the printing media, resulting in color defects and reduced print quality. Furthermore, during the ejection process, environmental factors such as excessive ejection speed, poor printhead condition, and airflow and humidity in the printing environment can also generate unwanted ink droplets or ink mist. These can adhere to the nozzle surface, causing poor ink ejection, or adhere to other components of the inkjet printer, causing contamination. Utility Model Content

[0003] This invention addresses the problems existing in the prior art by providing a printhead with an ink absorption component. This component absorbs unwanted ink droplets, ink streams, or ink mist generated during the printhead's operation, ensuring printhead reliability and print quality without affecting the normal operation of the printhead or occupying existing space in the printing equipment.

[0004] In a first aspect, this utility model provides a printhead with an ink-absorbing assembly, comprising: a printhead body having a jetting section having a plurality of jet holes forming a jetting area; and an ink-absorbing assembly disposed on the printhead body, the ink-absorbing assembly including a plurality of first ink-absorbing holes and at least one first ink-absorbing chamber communicating with the plurality of first ink-absorbing holes, the plurality of first ink-absorbing holes and the first ink-absorbing chamber being located on the periphery of the jetting area and on at least one side of the jetting area, the first ink-absorbing chamber being connected to a first negative pressure interface.

[0005] In one embodiment, the plurality of nozzles are arranged in at least one row along the length direction of the ejection section, and the plurality of first ink-absorbing holes are located on both sides of the ejection section along the length direction; or, the plurality of first ink-absorbing holes are arranged around the ejection section.

[0006] In one embodiment, there are at least two first ink-absorbing cavities, which are distributed at least on both sides of the ejection section.

[0007] In one embodiment, the printhead body includes a main body, the jetting part is mounted on the main body, the main body portion is recessed to form the first ink absorption chamber, and the ink absorption assembly includes an ink absorption plate covering the first ink absorption chamber, with the first ink absorption hole disposed on the ink absorption plate.

[0008] In one embodiment, the ink-absorbing plate is disposed on the jetting section, and the middle part of the ink-absorbing plate is provided with a groove that exposes all the nozzles of the jetting section to the outside; And / or, the ink-absorbing plate is made of a hydrophilic material, or, the surface of the ink-absorbing plate is provided with a hydrophilic layer; And / or, the outline of the first ink-absorbing hole is composed of a continuous smooth curve; And / or, the plurality of first ink suction holes are composed of first ink suction holes of two or more profile sizes; And / or, the main body is provided with a second ink-absorbing chamber spaced apart from the first ink-absorbing chamber, the second ink-absorbing chamber is connected to a second negative pressure interface, and the ink-absorbing plate is provided with a plurality of second ink-absorbing holes connected to the second ink-absorbing chamber, the outline size of the second ink-absorbing hole being larger than the outline size of the first ink-absorbing hole.

[0009] In one embodiment, the main body is provided with a receiving cavity spaced apart from the first ink absorption cavity, and the ejection part is placed in the receiving cavity.

[0010] In one embodiment, the negative pressure interface is connected to an ink suction channel, and the printhead body includes a shell covering at least a portion of the body. The shell is provided with a waste ink outlet, which is connected to the ink suction channel or the waste ink outlet allows the ink suction channel to pass through. A receiving space is formed between the outer shell and the main body, and the ink absorption channel is disposed in the receiving space; Alternatively, the ink absorption channel may be located within the main body.

[0011] In one embodiment, the printhead includes a second ink suction chamber and a plurality of second ink suction holes communicating with the second ink suction chamber. The first ink suction chamber and the second ink suction chamber are configured to communicate with two independent negative pressure sources respectively. The second ink suction holes are located in at least one of the printhead body, the jetting section, or the ink suction assembly. The outline size of the second ink suction hole is larger than the outline size of the first ink suction hole.

[0012] In one embodiment, the cross-sectional area of ​​the second ink-absorbing hole gradually decreases in the ink-absorbing direction of the ink-absorbing assembly.

[0013] In one embodiment, the hole wall on the side of the second ink suction hole away from the nozzle is referred to as the first hole wall, and the first hole wall gradually extends outward along the direction from the nozzle to the second ink suction hole; And / or, the projected outline of the second ink-absorbing hole in the ink-absorbing direction is a semi-circle.

[0014] Secondly, based on the above-mentioned printhead with ink-absorbing component, this utility model also provides a printing device, including: a printhead mounting component; at least one printhead with ink-absorbing component as described above mounted on the printhead mounting component; a first negative pressure source connected to the first negative pressure interface of the printhead; and a first waste ink collector connected to the first negative pressure source.

[0015] In one embodiment, the printing device includes an adsorption component and a third negative pressure source. The adsorption component is disposed on the printhead mounting component or is disposed independently of the printhead mounting component and the printhead. The adsorption component includes a third ink suction chamber disposed independently of the first ink suction chamber and a plurality of third ink suction holes communicating with the third ink suction chamber. The third ink suction chamber is connected to the third negative pressure source.

[0016] Thirdly, based on the above-mentioned printhead with ink-absorbing component, this utility model also provides an ink-absorbing component, which is disposed on the printhead body of the printhead with ink-absorbing component as described above. The printhead body is provided with a jetting section, and the jetting section is provided with a plurality of jet holes. The plurality of jet holes form a jetting area. The ink-absorbing component includes a plurality of first ink-absorbing holes and at least one first ink-absorbing chamber communicating with the plurality of first ink-absorbing holes. The plurality of first ink-absorbing holes and the first ink-absorbing chamber are located on the periphery of the jetting area and on at least one side of the jetting area. The first ink-absorbing chamber is connected to a first negative pressure interface.

[0017] By adopting the above structure, this utility model has the following advantages compared with the prior art: This invention employs a printhead with an ink suction assembly. Because the first ink suction orifice and the first ink suction chamber are located on the periphery of the ejection zone, they effectively absorb unwanted ink droplets, ink flows, or ink mist generated during printhead operation. Simultaneously, the ink suction operation of the first ink suction orifice does not interfere with the stable ejection of ink droplets or flows from the nozzle, ensuring the reliability of the printhead and improving print quality. Furthermore, the ink suction assembly is located within the printhead body, saving space in the printing equipment and providing convenient ink suction operation, thus improving printing efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a printhead with an ink-absorbing component according to an embodiment of the present utility model. Figure 2 for Figure 1 A three-dimensional structural diagram from another angle; Figure 3 for Figure 1 Top view; Figure 4 for Figure 3 Sectional view along direction AA; Figure 5 for Figure 4 Enlarged structural diagram of section B in the middle; Figure 6 This is an exploded view of a portion of the structure of a printhead with an ink-absorbing component according to an embodiment of the present invention. Figure 7 for Figure 6 Enlarged structural diagram of section C; Figure 8 for Figure 6 A three-dimensional structural diagram of the first housing and ink-absorbing plate from another angle is omitted; Figure 9 For along Figure 3 A partial view of another section view along the AA direction; Figure 10 This is a partial cross-sectional schematic diagram of another ink-absorbing plate according to an embodiment of the present utility model; Figure 11 For along Figure 3 A partial view of another sectional view along the AA direction; Figure 12 This is a three-dimensional structural diagram of the main body of an embodiment of the present utility model; Figure 13 for Figure 12 Another structural diagram; Figure 14 This is a schematic diagram of the printing device according to an embodiment of the present utility model; Figure 15 This is another structural schematic diagram of the printing device according to an embodiment of the present utility model.

[0019] In the attached diagram: Printer head 100; Printer body 10; Housing 1; Ink inlet 11; Waste ink outlet 13; Receiving space 14; Jet section 2; Nozzle 21; Ink suction assembly 3; Ink suction plate 31; First ink suction hole 311; Groove 312; Ink suction channel 313; First negative pressure source 33; Waste ink collector 34; Waste ink pipe 35; One-way valve 36; First ink suction chamber 37; First negative pressure interface 371; Main body 4; Receiving cavity 41; Second ink suction hole 71; Second ink suction chamber 72; Third ink suction hole 81; Third ink suction chamber 82; Printer mounting component 200. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1

[0022] like Figure 1-11As shown, this application embodiment provides a printhead 100 with an ink-absorbing assembly 3, which includes a printhead body 10 and an ink-absorbing assembly 3. One end of the printhead body 10 is provided with a jetting section 2, and the jetting section 2 is provided with a plurality of jet holes 21, which form a jetting area. The ink-absorbing assembly 3 is disposed on the printhead body 10, and the ink-absorbing assembly 3 includes a plurality of first ink-absorbing holes 311 and at least one first ink-absorbing chamber 37 communicating with the plurality of first ink-absorbing holes 311. The plurality of first ink-absorbing holes 311 and the first ink-absorbing chamber 37 are located on the periphery of the jetting area and on at least one side of the jetting area. The first ink-absorbing chamber 37 is connected to a first negative pressure connection. The port 371 can be a first negative pressure interface 371 opened on the cavity wall of the first ink suction chamber 371, or the first ink suction chamber 37 can be connected to the first negative pressure interface 371 through a pipe or channel. When the ink suction assembly 3 is working, the first negative pressure interface 371 of the first ink suction chamber 37 is connected to the waste ink collector 34. The waste ink collector 34 is connected to the first negative pressure source 33. The operation of the first negative pressure source 33 creates a negative pressure in the first ink suction chamber 37. Undesired ink droplets, ink flow, ink splatter, ink mist, etc. generated during the operation of the print head 100 are sucked into the first ink suction chamber 37 through the first ink suction hole 311 and finally enter the waste ink collector 34, which helps to reduce the clogging of the nozzle 21.

[0023] Since the first ink suction hole 311 and the first ink suction cavity 37 are located on the periphery of the ejection zone and on at least one side of the ejection zone, and are spaced apart from the ejection zone, and are not located on the ejection section 2, they can prevent unwanted ink droplets, ink streams, ink splatter, ink mist, etc., generated during the operation of the printhead 100. Simultaneously, the ink suction operation of the first ink suction hole 311 will not interfere with the stable ejection of ink droplets or ink streams from the nozzle 21, ensuring the reliability of the printhead operation and improving print quality. Furthermore, the ink suction assembly 3 is located on the printhead body 10, which does not occupy existing space in the printing device and makes the ink suction operation more convenient, improving printing efficiency. The printhead body 10 is provided with a liquid flow path that guides the liquid to the nozzle 21 of the jetting section 2. The first ink suction hole 311 and the first ink suction chamber 37 are located on the periphery of the jetting area. The first ink suction chamber 37 is spaced apart from the jetting section 2, so that the first ink suction chamber 37 and the liquid flow path communicating with the nozzle 21 can be independent of each other in spatial layout, without nesting or overlapping, thus reducing the manufacturing difficulty and maintenance cost of the printhead 100.

[0024] The ejection section 2 is a component from which liquid is ejected from the nozzle 21. As a specific example, the ejection section 2 can be a microporous structure with multiple nozzles 21, without an actuator. In a preferred embodiment, the ejection section 2 can be a nozzle plate structure. As another specific example, the ejection section 2 can be a microelectronic device manufactured based on semiconductor technology. In a preferred embodiment, the ejection section 2 includes a nozzle layer with multiple nozzles 21 and an actuator coupled to the nozzles 21. The printhead 100 may or may not include an actuator, depending on the actual printing requirements. The printhead 100 with ink suction assembly 3 of this invention is applicable to on-demand inkjet printing, as well as other liquid jet systems such as continuous inkjet printing.

[0025] The ink-absorbing assembly 3 is disposed on the printhead body 10. Specifically, the ink-absorbing assembly 3 can be entirely mounted on the printhead body 10, or a portion of the structure of the printhead body 10 can constitute a part of the ink-absorbing assembly 3, with another part of the ink-absorbing assembly 3 mounted on the printhead body 10. Alternatively, the ink-absorbing assembly 3 can be integrally formed with the printhead body 10, with the printhead body 10 having recessed or protruding features forming the first ink-absorbing cavity 37 and the first ink-absorbing hole 311. For the ink-absorbing assembly 3 being entirely mounted on the printhead body 10, as some examples, the ink-absorbing assembly 3 can be entirely mounted on the outer side wall of the printhead body 10 or inside the printhead body 10; or, a portion of the ink-absorbing assembly 3 can be mounted inside the printhead body 10, with another portion of the ink-absorbing assembly 3 exposed on the outside of the printhead body 10.

[0026] In some embodiments, such as Figure 3As shown, the plurality of nozzles 21 are arranged in at least one row along the length of the ejection section 2, and the plurality of first ink-absorbing holes 311 are located on both sides of the ejection section 2 along the length of the ejection section 2; or, the plurality of first ink-absorbing holes 311 are arranged around the ejection section 2. This is beneficial for improving ink absorption efficiency and making ink droplet adsorption more thorough. In addition to the above, the plurality of first ink-absorbing holes 311 can be located on one side of the ejection section 2 along the length of the ejection section 2, and are not limited to being distributed on both sides of the ejection section 2 or arranged around the ejection section 2. The arrangement parameters such as the number of first ink-absorbing holes 311, the size of the outline of the first ink-absorbing holes 311, the arrangement of the first ink-absorbing holes 311, and the spacing between adjacent first ink-absorbing holes 311 are selectively set according to factors such as the arrangement and number of nozzles 21, adsorption pressure, and ink absorption effect. Under the condition of satisfying the adsorption pressure, the first ink-absorbing holes 311 can adsorb ink droplets gathered at the nozzles 21 and ink splatter and ink mist around the print head 100. In some embodiments, the distance between the first ink-absorbing hole 311, which is closest to the nozzle 21, and the nozzle 21 is 1mm-5mm, so that the first ink-absorbing hole 311 can better adsorb the ink droplets gathered at the nozzle 21. Of course, while meeting manufacturing size requirements and ink absorption effect, the distance between the first ink-absorbing hole 31, which is closest to the nozzle 21, and the nozzle 21 can be less than 1mm and greater than 5mm.

[0027] In some embodiments, such as Figure 11 As shown, the plurality of first ink-absorbing holes 311 are composed of first ink-absorbing holes 311 with two or more contour sizes. The combination of first ink-absorbing holes 311 with different contour sizes is beneficial to improving the ink absorption effect.

[0028] In some embodiments, such as Figure 7 As shown, the outline of the first ink-absorbing hole 311 is composed of a continuous smooth curve. The outline of the first ink-absorbing hole 311 can be circular, elliptical, or gourd-shaped, etc., so that the edge of the first ink-absorbing hole 311 is relatively smooth. When the ink droplet P comes into contact with the edge of the first ink-absorbing hole 311, it is subjected to uniform shear force, which is conducive to the ink droplet being absorbed more completely. In addition, the smooth edge of the first ink-absorbing hole 311 can reduce the adsorption resistance, making it easier for the ink droplet to be absorbed, which is conducive to improving the efficiency of ink droplet adsorption.

[0029] In some embodiments, such as Figure 6 and Figure 8As shown, there are at least two first ink-absorbing chambers 37, distributed on both sides of the jet section 2 along its length. Providing two or more first ink-absorbing chambers 37 ensures that the adsorption pressure of each first ink-absorbing hole 311 meets the set requirements, which is beneficial for improving ink absorption efficiency. The number of first ink-absorbing chambers 37 is not limited to one or two; it can be more than two. The number of ink-jet chambers 37 can be determined based on the number of first ink-absorbing holes 311 to meet requirements such as adsorption pressure and adsorption efficiency. The first ink-absorbing chambers 37 are not limited to being distributed on both sides of the jet section 2; they can be arranged around the jet section 2.

[0030] In some embodiments, such as Figure 5 and Figure 6 as well as Figure 8 As shown, the printhead body 10 includes a main body 4, the spraying part 2 is mounted on the main body 4, and the main body 4 is partially recessed to form the first ink absorption chamber 37. The ink absorption assembly 3 includes an ink absorption plate 31 covering the first ink absorption chamber 37, and the first ink absorption hole 311 is disposed on the ink absorption plate 31. The ink absorption plate 31 and the first ink absorption chamber 37 are manufactured separately and then assembled into a whole. The ink absorption plate 31 and the main body 4 can be made of different or the same materials, which facilitates the installation, maintenance, and cleaning of the ink absorption assembly 3 and reduces manufacturing difficulty. Preferably, the ink absorption plate 31 is made of a hydrophilic material, or the surface of the ink absorption plate 31 is provided with a hydrophilic layer. The hydrophilic material and the hydrophilic layer facilitate the first ink absorption hole 311 in attracting ink droplets. The hydrophilic material can be glass, steel, etc. In other embodiments, the ink-absorbing plate 31 and the main body 4 are an integral structure, eliminating the need for later assembly. The main body 4 has a first ink-absorbing hole 311 on the cavity wall that forms the first ink-absorbing cavity 37, that is, the first ink-absorbing hole 311 communicating with the first ink-absorbing cavity 37 is directly machined on the main body 4.

[0031] In some embodiments, such as Figure 5 As shown, the main body 4 has a receiving cavity 41 spaced apart from the first ink-absorbing cavity 37. The ejector 2 is placed in the receiving cavity 41 and is directly installed into the receiving cavity 41 of the main body 4, eliminating the need for other components to connect the ejector 2 to the main body 4, thus simplifying the assembly steps of the ejector 2. Furthermore, the first ink-absorbing cavity 37 and the receiving cavity 41 are spaced apart on the main body 4, allowing them to be spatially independent. This ensures that the first ink-absorbing cavity 37 and the liquid flow channel communicating with the nozzle 21 are spatially independent, without nesting or overlapping, reducing the manufacturing difficulty and maintenance cost of the printhead 100. In other embodiments, when the main body 4 does not have a receiving cavity 41, the ejector 2 can be connected to the main body 4 through other components such as supports, holders, or mounting parts.

[0032] In some embodiments, such as Figure 5-7As shown, the ink-absorbing plate 31 covers the jetting section 2, and the middle of the ink-absorbing plate 31 has a groove 312 that exposes all the nozzles 21 of the jetting section 2 to the outside. The ink-absorbing plate 31 provides a certain degree of protection for the jetting section 2, reducing the possibility of contamination and scratching of the nozzles 21. Furthermore, the ink-absorbing plate 31 is an integral structure, i.e., a continuous plate structure, requiring only one installation. Simultaneously, the ink-absorbing plate 31 presses the jetting section 2 towards one side of the main body 4, enhancing the sealing installation. In other embodiments, the ink-absorbing plate 31 may be composed of two or more perforated plates joined together, forming the groove 312 between the perforated plates; alternatively, the ink-absorbing plate 31 may comprise two or more spaced-apart perforated plates, without needing to be joined into a single unit. In other embodiments, the ink-absorbing plate 31 is not covered by the jetting section 2, and the ink-absorbing plate 31 is arranged side-by-side with the jetting section 2.

[0033] In some embodiments, such as Figure 1 and Figure 8 As shown, the first negative pressure interface 371 is connected to the ink absorption channel 313. The printhead body 10 also includes a shell 1 covering at least part of the main body 4. For ease of assembly, the shell 1 is composed of two half-shells 1a and 1b joined together. The shell 1 has a waste ink outlet 13, which is connected to the ink absorption channel 313. Alternatively, the waste ink outlet 13 allows the ink absorption channel 313 to pass through. A receiving space 14 is formed between the shell 1 and the main body 4. The ink absorption channel 313 is located in the receiving space 14. The ink absorption channel 313 can be a pipe, which facilitates the arrangement of the ink absorption channel 313 and makes assembly and maintenance easier. Alternatively, the ink absorption channel 313 can be located in the main body 4. Correspondingly, the main body 4 has a receiving cavity (not shown) connected to the waste ink outlet 13. The ink absorption channel 313 is located in the receiving cavity. Figure 12 and Figure 13As shown, the main body 4 can also have an ink-absorbing channel 313 communicating with the first ink-absorbing chamber 37. This arrangement does not require increasing the size of the outer shell 1 or the overall volume of the print head 100. Only the first ink-absorbing chamber 37 and the ink-absorbing channel 313 need to be machined on the main body 4, and the waste ink outlet 13 needs to be machined on the outer shell 1. The shape and specific location of the ink-absorbing channel 313 on the main body 4 can be set according to actual needs. As a specific example, the ink-absorbing channel 313 includes a first channel 3131 directly connected to the first negative pressure interface 371, and a second channel 3132 connected to the first channel 3131. The second channel 3132 communicates with the waste ink outlet 13. The first channel 3131 and the second channel 3132 are arranged at a predetermined angle. The first channel 3131 is located on the side wall of the main body 4 and exposed outside the main body 4. The ink-absorbing channel 313 can communicate with one or more first negative pressure interfaces 371. In some embodiments, the ink suction channel 313 may not be provided inside the printhead body 10, and the first negative pressure interface 371 is directly connected to the waste ink outlet 13. In some other embodiments, the printhead body 10 does not include the outer shell 1.

[0034] Example 2

[0035] like Figure 11 As shown, this application provides another printhead 100 with an ink-absorbing assembly 3. This second embodiment adds a second ink-absorbing hole 71 and a second ink-absorbing chamber 72 to the first embodiment, while the other structures and connection methods are exactly the same as the first embodiment. Specifically, the printhead 100 includes a second ink-absorbing chamber 72 and a plurality of second ink-absorbing holes 71 communicating with the second ink-absorbing chamber 72. The first ink-absorbing chamber 37 and the second ink-absorbing chamber 72 are configured to communicate with two independent negative pressure sources respectively. The second ink-absorbing holes 71 are provided in at least one of the printhead body 10, the ejection section 2, or the ink-absorbing assembly 3. The second ink-absorbing holes 71 are used to absorb ink splatter, ink mist, etc. generated during the ejection process of the nozzle 21, reducing the impact of ink splatter and ink mist on the stability of the ink flow or ink droplets ejected from the nozzle 21 and the ink droplet splatter. The design mitigates adverse effects such as ink splatter and ink mist, thereby improving print quality and preventing ink splatter and ink mist from adhering to the printhead surface or other components, which would increase cleaning and maintenance costs. By adjusting the working pressure of the two negative pressure sources, the first ink suction hole 311 and the second ink suction hole 71 can both reach their respective optimal adsorption pressures, improving the ink suction effect. The outline size of the second ink suction hole 71 is larger than that of the first ink suction hole 311. When the adsorption pressure of the second ink suction hole 71 is sufficient, it helps to increase the spatial range and adsorption efficiency for absorbing ink splatter and ink mist.

[0036] Preferably, the second ink suction hole 71 is independently provided from the ejection section 2. The second ink suction hole 71 is located on the ink suction plate 31, the outer casing 1, or the main body 4. As a preferred embodiment, the second ink suction chamber 72 is located on the side of the first ink suction chamber 37 away from the ejection section 2, and the second ink suction hole 71 is located on the side of the first ink suction hole 311 away from the ejection section 2. Figure 11 As shown, the main body 4 is provided with a second ink-absorbing chamber 72 spaced apart from the first ink-absorbing chamber 37. The second ink-absorbing chamber 72 is connected to a second negative pressure interface. The ink-absorbing plate 2 is provided with a plurality of second ink-absorbing holes 71 connected to the second ink-absorbing chamber 72. The first ink-absorbing hole 311 and the second ink-absorbing hole 71 can be provided on the same ink-absorbing plate 31 or on two separate ink-absorbing plates 31.

[0037] Preferably, such as Figure 11 As shown, in the ink absorption direction of the ink absorption assembly, the cross-sectional area of ​​the second ink absorption hole 71 gradually decreases, and the ink absorption direction is... Figure 11 In the direction indicated by the middle arrow, to achieve a gradual decrease in the cross-sectional area of ​​the second ink-absorbing hole 71, in the first preferred embodiment, the hole wall on the side of the second ink-absorbing hole 71 away from the nozzle 21 is designated as the first hole wall 711. The first hole wall 711 gradually expands outward along the direction from the nozzle 21 to the second ink-absorbing hole 71. The first hole wall 711 can be a slope or a curved surface, etc. During the ejection process, ink splatter and ink mist generated by the nozzle 21 enter the second ink-absorbing chamber 72 along the first hole wall 711, which to a certain extent increases the space range for absorbing ink splatter and ink mist, making it easier for ink splatter and ink mist to be absorbed into the second ink-absorbing chamber 72, improving the effect of absorbing ink splatter and ink mist, and improving print quality. In the second preferred embodiment, based on the gradual decrease in the cross-sectional area of ​​the second ink-absorbing hole 71 in the ink-absorbing direction of the ink-absorbing assembly, such as... Figure 10 As shown, the projection of the second ink-absorbing hole 71 in the ink-absorbing direction is semi-circular or circular, which is beneficial to improving the ink-absorbing effect. Of course, the cross-sectional shape of the second ink-absorbing hole 71 can also be other shapes, not limited to semi-circular or circular. In other preferred embodiments, the first preferred embodiment and the second preferred embodiment described above can be combined.

[0038] Example 3

[0039] like Figure 14 As shown, based on the printhead 100 with ink suction component 3 provided in Embodiment 1 or Embodiment 2 above, this application embodiment also provides a printing device, which includes a printhead mounting component 200, at least one printhead 100 with ink suction component 3 as described in Embodiment 1 mounted on the printhead mounting component 200, a first negative pressure source 33, and a waste ink collector 34. The first negative pressure source 33 is connected to the first negative pressure interface 371 of the printhead 100, and the waste ink collector 34 is connected to the first negative pressure source 33.

[0040] In some embodiments, the first negative pressure source 33, the waste ink collector 34, and the waste ink outlet 13 of the printhead body 10 are connected through a waste ink pipe 35. The waste ink pipe 35 is also provided with a one-way valve 36 to prevent the ink from the waste ink collector 34 from flowing back into the printhead body 10. The first negative pressure source 33 is a mechanism capable of generating negative pressure. The first negative pressure source 33 can be a vacuum pump. The suction end of the vacuum pump is connected to the waste ink collector 34. The adsorption pressure of the first ink suction hole 31 is adjusted by adjusting the speed of the vacuum pump. In order to improve adsorption stability, increase response speed and extend the service life of the vacuum pump, a gas storage tank is also provided between the vacuum pump and the waste ink collector 34. The gas storage tank is equipped with a vacuum gauge and a safety valve. Alternatively, the first negative pressure source 33 includes a gas source and a vacuum generator connected to the gas source. The vacuum generator is connected to the waste ink collector 34. The pipeline connected to the gas source and the vacuum generator is equipped with a pressure regulating valve. Adjusting the pressure regulating valve changes the gas supply pressure, thereby adjusting the adsorption pressure of the first ink suction hole 311. Alternatively, the first negative pressure source 33 includes an exhaust device, such as an exhaust fan. The exhaust device creates a negative pressure in the first ink suction chamber 37, thereby sucking the ink droplets gathered around the nozzle 21 and the ink spray and ink mist around the print head 100 into the first ink suction chamber 37.

[0041] like Figure 15 As shown, preferably, the printing device includes an adsorption component and a third negative pressure source (not shown). The adsorption component is disposed on the printhead mounting component 200 or independently disposed relative to the printhead mounting component 200 and the printhead 100. The adsorption component includes a third ink suction chamber 82 independently disposed relative to the first ink suction chamber 37 and a plurality of third ink suction holes 81 communicating with the third ink suction chamber 82. The third ink suction chamber 82 is connected to the third negative pressure source. By controlling the operation of the third negative pressure source, a negative pressure is formed inside the third ink suction chamber 82, thereby causing the third ink suction holes 81 to adsorb ink splatter, ink mist, etc. in the air. The adsorption component can be installed on the printhead mounting 200, with a gap between the adsorption component and the printhead. Airborne ink, ink mist, etc., are drawn into the third ink suction chamber 82 through the gap. Alternatively, the third ink suction chamber 82 and the third ink suction hole 81 are formed by the printhead mounting 200 with recesses or protrusions. Multiple third ink suction holes 81 can be arranged around the printhead 100. Alternatively, the adsorption component can be set independently relative to the printhead mounting 200 and the printhead 100. The adsorption component can be fixedly installed on the frame and set close to the printhead 100. The frame can be set independently of the printhead mounting 200 or the printhead 100. Alternatively, the adsorption component can move between an initial position and a working position. The initial position is a position at a certain distance from the printhead 100 in the height direction, and the working position is located on one side of the printhead 100. During operation, the adsorption component moves from the initial position to the working position.

[0042] Example 4

[0043] like Figure 1-15 As shown, based on the printhead 100 with ink-absorbing component 3 described above, this application embodiment also provides an ink-absorbing component 3. This ink-absorbing component 3 is disposed on the printhead body 10 of the printhead 100 with ink-absorbing component 3 as described in Embodiment 1 or Embodiment 2. The printhead body 10 has a jetting section 2, which has a plurality of nozzles 21 forming a jetting area. The ink-absorbing component 3 includes a plurality of first ink-absorbing holes 311 disposed near the jetting section 2 and at least one first ink-absorbing chamber 37 communicating with the plurality of first ink-absorbing holes 311. The plurality of first ink-absorbing holes 311 and the first ink-absorbing chamber 37 are located on the periphery of the jetting area and on at least one side of the jetting area. The first ink-absorbing chamber 37 is connected to a first negative pressure interface 371. The specific structure of the ink-absorbing component 3 and its positional relationship with the printhead body 10 and the jetting section 2 are described in Embodiment 1 and will not be repeated here.

[0044] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] Although embodiments of the present invention have been shown and described above, they should not be construed as limiting the scope of the claims. The present invention is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A printhead with an ink suction assembly, characterized in that, include: The nozzle body has a spray section, which has multiple spray holes, and the multiple spray holes form a spray area; An ink-absorbing assembly is disposed on the printhead body, the ink-absorbing assembly including a plurality of first ink-absorbing holes and at least one first ink-absorbing chamber communicating with the plurality of first ink-absorbing holes; The plurality of first ink suction holes and first ink suction chambers are located on the periphery of the jetting area and on at least one side of the jetting area, and the first ink suction chamber is connected to a first negative pressure interface.

2. The printhead with an ink-absorbing assembly as described in claim 1, characterized in that, The plurality of nozzles are arranged in at least one row along the length of the ejection section, and the plurality of first ink-absorbing holes are located on both sides of the ejection section along the length of the ejection section; Alternatively, multiple first ink-absorbing holes may be arranged around the ejector section.

3. The printhead with an ink-absorbing assembly as described in claim 2, characterized in that, There are at least two first ink-absorbing cavities, and they are distributed at least on both sides of the ejection section.

4. The printhead with an ink-absorbing assembly as described in any one of claims 1-3, characterized in that, The printhead body includes a main body, the spraying part is installed on the main body, the main body is recessed to form the first ink absorption chamber, and the ink absorption assembly includes an ink absorption plate covering the first ink absorption chamber, and the first ink absorption hole is disposed on the ink absorption plate.

5. The printhead with an ink-absorbing assembly as described in claim 4, characterized in that, The ink-absorbing plate is disposed on the jetting section, and the middle part of the ink-absorbing plate is provided with a groove that exposes all the nozzles of the jetting section to the outside. And / or, the ink-absorbing plate is made of a hydrophilic material, or, the surface of the ink-absorbing plate is provided with a hydrophilic layer; And / or, the outline of the first ink-absorbing hole is composed of a continuous smooth curve; And / or, the plurality of first ink suction holes are composed of first ink suction holes of two or more profile sizes; And / or, the main body is provided with a second ink-absorbing chamber spaced apart from the first ink-absorbing chamber, the second ink-absorbing chamber is connected to a second negative pressure interface, and the ink-absorbing plate is provided with a plurality of second ink-absorbing holes connected to the second ink-absorbing chamber, the outline size of the second ink-absorbing hole being larger than the outline size of the first ink-absorbing hole.

6. The printhead with an ink-absorbing assembly as described in claim 4, characterized in that, The main body has a receiving cavity spaced apart from the first ink absorption cavity, and the ejection part is placed in the receiving cavity.

7. The printhead with an ink-absorbing assembly as described in claim 4, characterized in that, The negative pressure interface is connected to an ink suction channel, and the printhead body includes a shell covering at least part of the body. The shell is provided with a waste ink outlet, and the waste ink outlet is connected to the ink suction channel or the waste ink outlet is through which the ink suction channel passes. A receiving space is formed between the outer shell and the main body, and the ink absorption channel is disposed in the receiving space; Alternatively, the ink absorption channel may be located within the main body.

8. The printhead with an ink-absorbing assembly as described in claim 1, characterized in that, The printhead includes a second ink suction chamber and a plurality of second ink suction holes communicating with the second ink suction chamber. The first ink suction chamber and the second ink suction chamber are configured to communicate with two independent negative pressure sources respectively. The second ink suction holes are located in at least one of the printhead body, the jetting section, or the ink suction assembly. The outline size of the second ink suction hole is larger than the outline size of the first ink suction hole.

9. The printhead with an ink-absorbing assembly as described in claim 8, characterized in that, In the ink absorption direction of the ink absorption assembly, the cross-sectional area of ​​the second ink absorption hole gradually decreases.

10. The printhead with an ink-absorbing assembly as described in claim 9, characterized in that, The side of the second ink-absorbing hole away from the nozzle is referred to as the first hole wall, and the first hole wall gradually extends outward along the direction from the nozzle to the second ink-absorbing hole; And / or, the projected outline of the second ink-absorbing hole in the ink-absorbing direction is a semi-circle.

11. A printing device, characterized in that, include: A printhead mounting assembly, and at least one printhead with an ink suction assembly as described in any one of claims 1-10 mounted on the printhead mounting assembly; The first negative pressure source is connected to the first negative pressure interface of the print head; The first waste ink collector is connected to the first negative pressure source.

12. The printing apparatus as claimed in claim 11, characterized in that, The printing device includes an adsorption component and a third negative pressure source. The adsorption component is disposed on the printhead mounting component or is disposed independently of the printhead mounting component and the printhead. The adsorption component includes a third ink suction chamber disposed independently of the first ink suction chamber and a plurality of third ink suction holes communicating with the third ink suction chamber. The third ink suction chamber is connected to the third negative pressure source.

13. An ink-absorbing assembly disposed in the printhead body of a printhead having an ink-absorbing assembly as described in any one of claims 1-10, wherein the printhead body has an ejection section having a plurality of nozzles forming an ejection zone, characterized in that, include: The ink suction assembly includes a plurality of first ink suction holes and at least one first ink suction chamber communicating with the plurality of first ink suction holes. The plurality of ink suction holes and the first ink suction chamber are located around the ejection area of ​​the print head according to any one of claims 1-10 and are located on at least one side of the ejection area. The first ink suction chamber is connected to a first negative pressure interface.

Images