Modularized electrofluid nozzle, jet printing device and ink-jet printing system

Abstract

The invention relates to a modular electrofluid nozzle, a jet printing device and an ink-jet printing system, and the nozzle comprises a main body part which is provided with a connecting hole in one end surface; the needle body part comprises a liquid outlet section and a connecting section, the liquid outlet section is provided with a liquid outlet hole, the connecting section is provided with a positioning hole, and the connecting section is inserted into the connecting hole so as to be in insertion fit with the main body part; the electrode assembly comprises an electrode holder and an electrode wire, the electrode holder comprises a fixing section and an abutting section, the fixing section is inserted into the positioning hole so that the electrode holder and the needle body part can be in inserted fit, the abutting section is located in the connecting hole and abuts against the end face of the connecting section, the electrode holder is used for being electrically connected with an external power supply device, and the electrode wire penetrates into the liquid outlet hole. The main body part, the needle body part and the electrode assembly are designed in a modularized mode and are matched in an inserting mode and the like when assembled, it is ensured that the relative positions of the main body part, the needle body part and the electrode assembly are consistent, the needle body part can be conveniently and independently replaced, after the needle body part is replaced, the relative positions of the needle body part and the electrode assembly can still be kept unchanged, and the printing quality is ensured.

Description

Technical Field

[0001] The present application relates to the field of inkjet printing technology, and in particular to a modular electrofluid nozzle, a printing device and an inkjet printing system. Background Art

[0002] Inkjet printing equipment has been widely used in recent years due to its advantages of saving materials, being environmentally friendly, and being easy to operate. Traditional inkjet printing technology has the disadvantages of low printing resolution, droplet size limited by nozzle diameter, easy nozzle clogging, and complex nozzle manufacturing process. Compared with traditional inkjet printing technology, electrohydrodynamic inkjet printing technology can produce smaller droplets and liquid filaments, with a diameter of nanometers. At the same time, electrohydrodynamic inkjet printing technology can print more materials such as polymer organic matter, making its application range wider, such as flexible electronic manufacturing, ceramic component manufacturing, tissue engineering, etc.

[0003] Electrofluidic printing technology uses electrohydrodynamics to pull liquid out of the nozzle to form a Taylor cone using an electric field. Since the nozzle has a high electric potential, the liquid at the nozzle will be subjected to electro-shear stress; when the local charge force exceeds the surface tension of the liquid, the charged liquid is ejected from the nozzle and then breaks into liquid columns or small droplets. By changing the flow rate, voltage, liquid properties and nozzle structure, electrofluidic printing modes with different jet shapes and breakup mechanisms can be formed, namely electrospinning, electrospray and electrospray.

[0004] In the related art, conductive filaments are arranged in the flow channel of the nozzle and the substrate to be printed is grounded to form an electric field between the nozzle and the substrate, so that the functional liquid is ejected from the nozzle by utilizing the electric field force.

[0005] However, due to the small size of the sprayed droplets, the size of the nozzle needle needs to be set very small, generally the nozzle needle tip diameter is in the micron level, so the nozzle needle is easily contaminated or even blocked by the functional liquid, and the nozzle needle is also very easy to be damaged by external force. In order to ensure the printing quality, the service life of the nozzle needle is short. When the nozzle needle does not meet the printing requirements, the entire nozzle is usually unusable, resulting in a waste of resources. In addition, even if the nozzle needle can be replaced, after replacing the nozzle needle, the relative position of the nozzle needle and the electrode wire inside the nozzle is difficult to guarantee, resulting in the electric field force on the functional liquid being difficult to restore to its original state, which has an adverse effect on the printing quality. Summary of the invention

[0006] The embodiments of the present application provide a modular electrofluid nozzle, a printing device and an inkjet printing system to solve the technical problems in the related art that the life of the nozzle needle in the electrofluid nozzle determines the life of the electrofluid nozzle, resulting in waste of resources, and it is difficult to ensure the relative position of the replaced nozzle needle and the electrode wire, thus affecting the printing quality.

[0007] In a first aspect, a modular electrofluidic showerhead is provided, comprising:

[0008] A main body, wherein one end surface of the main body is provided with a connecting hole;

[0009] A needle body, the needle body comprising a liquid outlet section and a connecting section, the liquid outlet section is provided with a liquid outlet hole, the connecting section is provided with a positioning hole, the positioning hole is communicated with the liquid outlet hole, and the connecting section is inserted into the connecting hole to form a plug-in fit with the main body;

[0010] An electrode assembly, the electrode assembly comprising an electrode seat and an electrode wire, the electrode wire being connected to the electrode seat, the electrode seat comprising a fixed section and an abutment section, the fixed section being inserted into the positioning hole so that the electrode seat and the needle body form a plug-in fit, the abutment section being located in the connecting hole and abutting against the end face of the connecting section, the electrode seat being used to be electrically connected to an external power supply device, and the electrode wire being passed through the liquid outlet.

[0011] In some embodiments, the electrode seat is provided with a penetrating air hole, the air hole connects the connecting hole, the positioning hole and the liquid outlet hole, and the connecting hole is used to connect with an external air pressure regulating device.

[0012] In some embodiments, the electrode assembly further comprises a plurality of screws, the plurality of screws are evenly distributed in a circle about the center line of the electrode seat, the screw threads are threaded through the electrode seat, the electrode wire is threaded through the pores and a gap is left between the electrode wire and the pore walls, one end of the plurality of screws extends into the pores and presses against the electrode wire so that the electrode wire is fixed to and electrically connected to the electrode seat.

[0013] In some embodiments, a gap is left between the electrode wire and the wall of the liquid outlet hole, and one end of the electrode wire extends to the outlet of the liquid outlet section.

[0014] In some embodiments, the connecting hole includes a receiving hole section, a threaded hole section and a sealing hole section, and the connecting section includes a threaded section and a mating section; the abutting section of the electrode seat is located in the receiving hole section, the threaded section is threadedly connected to the threaded hole section, and the circumferential outer side surface of the mating section is tightly attached to the hole wall of the sealing hole section.

[0015] In some embodiments, a positioning portion is provided on the circumferential outer side of the liquid outlet section, and the main body is suitable for pressing against the positioning portion.

[0016] In some embodiments, the modular electrofluid nozzle further includes an elastic member, wherein the elastic member is located in the connecting hole, and two ends of the elastic member are respectively pressed against the electrode seat and the bottom of the connecting hole, and the elastic force of the elastic member presses the electrode seat against the needle body.

[0017] In some embodiments, the main body of the modular electric fluid nozzle is made of a conductive material, the needle body is made of an insulating material, the main body is used to be electrically connected to an external power supply device, and the main body is electrically connected to the electrode assembly through an elastic member.

[0018] In some embodiments, the modular electrofluid nozzle also includes a positioning seat, which is sleeved on the main body, and the positioning seat includes a positioning surface, and the positioning surface of the positioning block is suitable for abutting against an external nozzle seat. The positioning seat is made of a conductive material, and the positioning seat is electrically connected to the main body, and the positioning seat is electrically connected to an external power supply device.

[0019] In some embodiments, the modular electrofluid nozzle also includes a needle tube, which is passed through the liquid outlet and the needle tip of the needle tube is located outside the liquid outlet, and the electrode wire is passed through the needle tube and one end of the electrode wire extends to the needle tip of the needle tube.

[0020] The beneficial effects of the technical solution provided by this application include:

[0021] The embodiment of the present application provides a modular electrofluid nozzle. Due to the modular arrangement of the main body, the needle body and the electrode assembly, when the needle body is damaged or reaches the end of its service life, resulting in poor printing effect, the needle body can be replaced with a new one by removing the needle body from the main body, thereby ensuring the printing quality. Only the needle body can be replaced without replacing the electrode assembly or the main body, thereby reducing costs. In addition, the modular design of the main body, the electrode assembly and the needle body facilitates the separate processing of the main body, the electrode assembly and the needle body, and then assembles the electrofluid nozzle to facilitate mass production and save the manufacturing cost of the electrofluid nozzle.

[0022] Furthermore, since the electrode holder of the electrode assembly is plug-fitted with the needle body, and the needle body is plug-fitted with the main body, the assembly form of the three is simple and the assembly efficiency is high. More importantly, since the electrode wire is connected to the electrode holder, the relative position of the electrode wire and the needle body can be determined by determining the relative position of the electrode holder and the needle body. Among them, the fixed section of the electrode holder is plug-fitted with the connecting section of the needle body to determine the position of the electrode assembly in the radial direction of the needle body, and the abutment of the abutment section of the electrode holder with the end face of the connecting section is used to determine the position of the electrode assembly in the axial direction of the needle body. Therefore, after the needle body, the electrode assembly and the main body are assembled, the relative position of the needle body and the electrode assembly is determined. Even if the needle body is replaced, the relative position of the electrode assembly and the needle body can still be guaranteed to remain unchanged, and the consistency of the electric field force on the functional fluid before and after the needle body is replaced is guaranteed, thereby ensuring the printing quality. In addition, when mass-producing electric fluid nozzles, since the position of the electrode assembly relative to the needle body is positioned, the spray consistency of a large number of electric fluid nozzles is better, and it is easier to ensure printing accuracy.

[0023] In a second aspect, a printing device is provided, comprising the modular electrofluidic printhead as described above.

[0024] Another embodiment of the present application provides a printing device. Since the printing device includes the modular electrofluid nozzle as described above, the beneficial effects of the printing device are consistent with the beneficial effects of the modular electrofluid nozzle, which will not be repeated here.

[0025] In a third aspect, an inkjet printing system is provided, comprising the modular electrofluidic nozzle as described above, and / or the printing device as described above.

[0026] Another embodiment of the present application provides an inkjet printing system. Since the inkjet printing system includes the modular electrofluid nozzle as described above, and / or the printing device as described above, the beneficial effects of the inkjet printing system are consistent with the beneficial effects of the above-mentioned modular electrofluid nozzle and printing device, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of a modular electrofluidic showerhead provided in an embodiment of the present application;

[0029] Figure 2 A partial longitudinal cross-sectional view of a modular electric fluid nozzle provided in an embodiment of the present application;

[0030] Figure 3 for Figure 2 Partial schematic diagram in;

[0031] Figure 4 A partial exploded view of a modular electrofluidic showerhead provided in an embodiment of the present application;

[0032] Figure 5 A schematic diagram of the assembly of the needle body and the electrode assembly provided in an embodiment of the present application.

[0033] In the figure: 1. main body; 1a. connecting hole; 1a1. accommodating hole section; 1a2. threaded hole section; 1a3. sealing hole section; 1b. vent; 2. needle body; 21. liquid outlet section; 21a. liquid outlet hole; 21b. glue hole; 22. connecting section; 221. threaded section; 222. matching section; 223. positioning part; 22a. positioning hole; 3. electrode assembly; 31. electrode seat; 311. fixing section; 312. abutting section; 31a. air hole; 32. electrode wire; 33. screw; 4. elastic member; 5. positioning seat; 6. needle tube. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0035] The embodiment of the present application provides a modular electrofluid nozzle, a printing device and an inkjet printing system, wherein the main body, the needle body and the electrode assembly are modularly designed, and when the three are assembled, the relative positions of the three are ensured to be consistent through plug-in and other forms of cooperation, which not only facilitates the replacement of the needle body alone, but also maintains the relative position of the needle body and the electrode assembly unchanged after the needle body is replaced, thereby ensuring the printing quality. The present application solves the technical problem in the related art that the life of the spray needle in the electrofluid nozzle determines the life of the electrofluid nozzle, resulting in a waste of resources, and it is difficult to ensure the relative position of the replaced spray needle and the electrode wire, thus affecting the printing quality.

[0036] Reference Figure 1-Figure 3 A modular electric fluid nozzle comprises a main body 1, a needle body 2 and an electrode assembly 3. The main body 1 and the needle body 2 are tubular structures, and the main body 1 and the needle body 2 are plugged in. The electrode assembly 3 is plugged in with the needle body 2, and the electrode assembly 3 is located inside the needle body 2 and the main body 1. The main body 1, the needle body 2 and the electrode assembly 3 are detachably connected, and the relative positions of their components are determined, which is convenient for replacing the damaged needle body 2, so as to extend the service life of the overall electric fluid nozzle and reduce resource waste. In addition, the relative positions of the needle body 2 and the electrode assembly 3 are consistent before and after the needle body 2 is replaced, so as to ensure the printing effect before and after the needle body 2 is replaced, and to ensure the printing quality. If the printing landing point position of the electric fluid nozzle needs to be recalibrated, the steps of recalibrating the electric fluid nozzle are easier and the printing efficiency is higher.

[0037] Specifically, the needle body 2 is pre-filled with the functional liquid, and then the needle body 2, the electrode assembly 3 and the main body 1 are assembled. The main body 1 is used to be mounted on the external nozzle seat, and the electrode assembly 3 is used to be electrically connected to the external power supply device to achieve voltage application at the needle body 2, and an electric field is formed between the needle body 2 and the substrate to be printed, and the electric field force drives the functional liquid in the needle body 2 to be ejected.

[0038] Reference Figure 1-Figure 3 The main body 1 includes a connecting hole 1a, and the main body 1 is plugged and matched with the needle body 2 through the connecting hole 1a. In this embodiment, the connecting hole 1a is colinear with the center line of the main body 1.

[0039] Reference Figure 1-Figure 3 The needle body 2 includes a liquid outlet section 21 and a connecting section 22. The connecting section 22 is inserted into the connecting hole 1a of the main body 1 so that the needle body 2 and the main body 1 form a plug-in fit. The liquid outlet section 21 is provided with a liquid outlet hole 21a, and the connecting section 22 is provided with a positioning hole 22a. The liquid outlet hole 21a is connected to the positioning hole 22a. In this embodiment, the center lines of the liquid outlet section 21, the liquid outlet hole 21a, the connecting section 22, and the positioning hole 22a are collinear.

[0040] After the needle body 2 is plugged into the main body 1, the connection hole 1a, the positioning hole 22a and the liquid outlet 21a are connected. The connection hole 1a is connected to the external air pressure control device so that the liquid outlet 21a is in the air pressure state required for printing, and the air pressure environment required for printing is provided in the needle body 2.

[0041] Reference Figure 1-Figure 3 Specifically, the main body 1 further includes a vent hole 1b, one end of which is connected to the end surface of the main body 1 away from the needle body 2, and the other end of which is connected to the connecting hole 1a. The air pressure regulating device is connected to the vent hole 1b at the end of the main body 1 through an air pipe to provide the needle body 2 with the air pressure environment required for printing.

[0042] Reference Figure 1-Figure 3 , wherein the electrode assembly 3 is inserted into the positioning hole 22a, and the relative position of the electrode assembly 3 and the needle body 2 is determined by the positioning hole 22a. Therefore, after the needle body 2, the main body 1 and the electrode assembly 3 are assembled, the relative positions of the three are determined, so that after the electrofluid nozzles are mass-produced, the printing consistency of the electrofluid nozzles in large quantities is better. In addition, after replacing the needle body 2, the relative position of the needle body 2 and the electrode assembly 3 remains unchanged, ensuring that the electric field force on the functional fluid in the needle body 2 remains unchanged, thereby ensuring the printing quality. When the printing landing point position of the electrofluid nozzle needs to be recalibrated, the calibration efficiency is also higher.

[0043] It should be noted that the needle body 2 needs to be replaced if the needle body 2 is damaged, contaminated, or the functional fluid in the needle body 2 is consumed.

[0044] Reference Figure 1-Figure 3 , wherein the electrode assembly 3 includes an electrode holder 31 and an electrode wire 32. The electrode wire 32 is connected to the electrode holder 31 and ensures the relative position of the electrode and the electrode holder 31.

[0045] Reference Figure 2-Figure 5 The electrode holder 31 includes a fixing section 311 and a contact section 312. The fixing section 311 is inserted into the positioning hole 22a so that the electrode holder 31 and the needle body 2 form a plug-in fit, wherein the circumferential outer side surface of the fixing section 311 is in contact with the hole wall of the positioning hole 22a. The contact section 312 is located in the connecting hole 1a and is tightly pressed against the end surface of the connecting section 22. The electrode wire 32 is inserted into the liquid outlet hole 21a.

[0046] In this arrangement, the position of the electrode wire 32 is determined by determining the position of the electrode holder 31. The radial position of the electrode assembly 3 in the needle body 2 is determined by the plug-in fit between the fixed section 311 and the positioning hole 22a. The axial position of the abutment section 312 in the needle body 2 is determined by the abutment section 312 abutting against the end face of the connecting section 22. Therefore, after the electrode assembly 3 and the needle body 2 are assembled, the relative position of the electrode assembly 3 and the needle body 2 is determined, so as to facilitate the replacement of the needle body 2 and ensure the installation position accuracy after the needle body 2 is replaced.

[0047] In this embodiment, after each assembly of the needle body 2, the position of the electrode wire 32 in the needle body 2 is consistent, and the position of the end of the electrode wire 32 away from the electrode holder 31 in the needle body 2 does not change. That is, the position where the voltage is applied to the functional fluid inside the needle body 2 is consistent, ensuring that after the needle body 2 is replaced, the electric field force on the functional fluid inside the needle body 2 remains consistent.

[0048] The electrode holder 31 is used to be electrically connected to an external power supply device, so that the electric field conditions required for printing can be formed by transmitting the electric field to the functional liquid through the electrode wire 32 .

[0049] Reference Figure 2-Figure 5 Furthermore, the electrode holder 31 is provided with an air hole 31a which runs through from top to bottom, and the air hole 31a connects the connection hole 1a and the positioning hole 22a. Therefore, the air hole 1b, the connection hole 1a, the air hole 31a, the positioning hole 22a, and the liquid outlet hole 21a are connected in sequence, so that the air pressure environment required for printing can be provided in the liquid outlet hole 21a at the air hole 1b.

[0050] Reference Figure 2-Figure 5 In this embodiment, one end of the electrode wire 32 is passed through the air hole 31 a and connected to the electrode holder 31 in the air hole 31 a.

[0051] Reference Figure 2-Figure 5Specifically, the electrode assembly 3 also includes a plurality of screws 33, and the plurality of screws 33 are evenly distributed circumferentially with respect to the center line of the electrode holder 31, and the screws 33 are threadedly penetrated through the electrode holder 31. In the present embodiment, in the present embodiment, the plurality of screws 33 are installed in the abutment section 312. The screw 33 includes a top screw. The electrode wire 32 is penetrated through the pore 31a and a gap is left between the electrode wire 32 and the pore wall of the pore 31a. One end of the plurality of screws 33 extends into the pore 31a and presses against the electrode wire 32, so that the electrode wire 32 is fixed and electrically connected to the electrode holder 31. In the present embodiment, two screws 33 are provided, and the two screws 33 are arranged opposite to each other and clamp the electrode wire 32.

[0052] In this arrangement, the electrode wire 32 is fixed to the screw 33 by clamping the electrode wire 32 with multiple screws 33, which facilitates the adjustment of the relative position of the electrode wire 32 and the electrode holder 31, and ensures that the relative position of each group of electrode wires 32 and the electrode holder 31 is more consistent. In this embodiment, the center lines of the electrode holder 31 and the electrode wire 32 are collinearly arranged to facilitate accurate adjustment of the relative position of the electrode wire 32 and the electrode holder 31. In addition, the screw 33 clamps the electrode wire 32 to make the electrical connection between the electrode holder 31 and the electrode wire 32 more stable, and the generated electric field force is more stable, thereby ensuring the printing quality.

[0053] Reference Figure 2-Figure 5 , wherein the gap reserved between the electrode wire 32 and the hole wall of the air hole 31a enables the connection hole 1a to communicate with the positioning hole 22a through the air hole 31a. By arranging the installation position and installation form of the electrode wire 32 on the electrode holder 31, it is not necessary to arrange an additional through hole on the electrode holder 31 for connecting the connection hole 1a and the positioning hole 22a, thereby simplifying the structure of the electrode holder 31.

[0054] Reference Figure 2-Figure 5 In this embodiment, after the electrode assembly 3 is assembled with the needle body 2 , a gap is left between the electrode wire 32 and the hole wall of the liquid outlet hole 21 a , and one end of the electrode wire 32 extends to the outlet of the liquid outlet section 21 .

[0055] In this arrangement, the electrode wire 32 does not contact the hole wall of the liquid outlet hole 21a, so as to avoid the mutual influence between the electrode wire 32 and the needle body 2, ensure the conductive performance of the electrode wire 32, and ensure the surface roughness of the hole wall of the liquid outlet hole 21a, so as to ensure the normal operation of the electrofluid nozzle. By extending one end of the electrode wire 32 to the outlet of the liquid outlet section 21, and the position where the voltage is applied to the functional liquid is as close as possible to the injection point, the feedback of the functional liquid is more sensitive and the control accuracy is higher when the voltage is subsequently adjusted.

[0056] Reference Figure 1-Figure 4The connecting hole 1a includes a receiving hole section 1a1, a threaded hole section 1a2 and a sealing hole section 1a3, which are arranged in sequence in the direction toward the needle body 2. The connecting section 22 includes a threaded section 221 and a matching section 222.

[0057] Reference Figure 1-Figure 4 The abutment section 312 of the electrode holder 31 is located in the accommodating hole section 1a1. In this embodiment, a gap is left between the circumferential outer side surface of the abutment section 312 and the hole wall of the accommodating hole section 1a1 to facilitate placing the electrode holder 31 in the accommodating hole section 1a1 and reduce the difficulty of assembly.

[0058] Reference Figure 1-Figure 4 The threaded section 221 is threadedly connected with the threaded hole section 1a2, and the circumferential outer side surface of the matching section 222 is in close contact with the hole wall of the sealing hole section 1a3. Since there is still an assembly gap in the threaded connection between the threaded section 221 and the threaded hole section 1a2, the plug-in matching of the matching section 222 and the sealing hole section 1a3 is provided to ensure the connection sealing of the connection between the needle body 2 and the main body 1, reduce the risk of liquid leakage and gas leakage, and keep the air pressure environment inside the needle body 2 stable.

[0059] With this arrangement, the needle body 2 and the main body 1 are connected by a thread, which not only facilitates the disassembly and assembly of the needle body 2 and the main body 1, but also improves the connection strength between the needle body 2 and the main body 1, and utilizes the cooperation of the matching section 222 and the sealing hole section 1a3 to improve the connection sealing at the connection between the needle body 2 and the main body 1.

[0060] Reference Figure 2-Figure 5 Furthermore, a positioning portion 223 is provided on the circumferential outer side of the liquid outlet section 21, and the main body 1 is adapted to be pressed against the positioning portion 223. In this embodiment, the positioning portion 223 is integrally formed with the liquid outlet section 21. When the main body 1 is threadedly connected with the needle body 2, the end surface of the main body 1 is pressed against one side of the positioning portion 223.

[0061] By arranging the positioning portion 223 for the main body 1 to press against, not only is the threaded connection between the main body 1 and the needle body 2 locked, but the relative position of the main body 1 and the needle body 2 after connection can also be positioned, thereby improving the consistency of each assembly of the needle body 2 and the main body 1.

[0062] Reference Figure 2-Figure 5 The modular electrofluid nozzle further comprises an elastic member 4, which is located in the connecting hole 1a, and the two ends of the elastic member 4 are respectively pressed against the electrode holder 31 and the bottom of the connecting hole 1a, and the elastic force of the elastic member 4 presses the electrode holder 31 against the needle body 2. In this embodiment, the elastic member 4 comprises a spring.

[0063] With this arrangement, the elastic member 4 can also be removed along with the disassembly of the needle body 2 and the electrode assembly 3, thereby improving the assembly flexibility of the electrofluid nozzle. The elastic force of the elastic member 4 presses against the electrode holder 31, ensuring that the relative position of the electrode holder 31 and the needle body 2 is fixed and not prone to relative changes. This ensures both assembly accuracy and power supply stability of the electrode assembly 3 during printing.

[0064] Reference Figure 2-Figure 5 In this embodiment, the elastic member 4 is located in the accommodating hole section 1a1.

[0065] Furthermore, the main body 1 is made of a conductive material, and the needle body 2 is made of an insulating material. The main body 1 is used to be electrically connected to an external power supply device, and the main body 1 is electrically connected to the electrode assembly 3 through the elastic member 4.

[0066] In this arrangement, the voltage is introduced to the electrode assembly 3 by using the main body 1, and there is no need to arrange a wiring structure in the main body 1 or the needle body 2 to electrically connect the electrode assembly 3, which simplifies the structure of the electric fluid nozzle. The main body 1 and the electrode assembly 3 are electrically connected through the elastic member 4. Due to the elastic force of the elastic member 4, the elastic member 4 is stably pressed against the main body 1 and the electrode assembly 3, thereby ensuring the stability of the electrical connection between the main body 1 and the electrode assembly 3. It should be noted that the elastic member 4 is made of a conductive material.

[0067] The needle body 2 is filled with functional liquid and arranged with electrode wire 32. Since the needle body 2 is made of insulating material, the needle body 2 is not easily corroded by electrochemical means, so as to increase the service life of the needle body 2 and ensure the printing effect of the needle body 2. In addition, the needle body 2 will not discharge and cause electric field crosstalk to the functional liquid, thus ensuring the printing accuracy.

[0068] Reference Figure 1-Figure 4 Optionally, the modularized electrofluid nozzle further comprises a positioning seat 5, which is sleeved on the main body 1, and the positioning seat 5 comprises a positioning surface. In this embodiment, the top surface and the bottom surface of the positioning seat 5 are both positioning surfaces. The positioning surface of the positioning block is suitable for abutting against the external nozzle seat to locate the installation position of the electrofluid nozzle. The positioning seat 5 is made of a conductive material, and the positioning seat 5 is electrically connected to the main body 1, and the positioning seat 5 is electrically connected to the external power supply device.

[0069] With this arrangement, the arrangement of the positioning seat 5 not only facilitates the rapid and accurate installation of the fluid nozzle on the nozzle seat, but also utilizes the positioning seat 5 to be electrically connected to the power supply device, so as to facilitate the voltage to be led to the main body 1 and then to the electrode assembly 3, so that the form of powering the electrode assembly 3 is more flexible.

[0070] Reference Figure 1-Figure 4The modular electrofluid nozzle further comprises a needle tube 6, which is inserted into the liquid outlet hole 21a, and the outer wall of the needle tube 6 is close to the liquid outlet hole 21a, and the needle tube 6 is clamped and fixed by the hole wall of the liquid outlet hole 21a. The needle tip of the needle tube 6 is located outside the liquid outlet hole 21a, and the electrode wire 32 is inserted into the needle tube 6, and one end of the electrode wire 32 extends to the needle tip of the needle tube 6.

[0071] In this arrangement, the needle tube 6 is used to replace the needle body 2 to spray the functional liquid. On the one hand, the structure of the needle tube 6 is simpler. By processing the needle tube 6 independently, it is easier to process a needle tip with a smaller injection port, reducing the manufacturing difficulty of the needle body 2. On the other hand, the needle tube 6 and the needle body 2 are manufactured separately and then assembled, and the processing efficiency and quality are easier to ensure, which is more suitable for mass production needs.

[0072] Furthermore, the hole wall of the liquid outlet 21a is provided with a step surface, and the top surface of the needle tube 6 is pressed against the step surface to position the needle tube 6 relative to the needle body 2, thereby ensuring better consistency in the relative position of the needle body 2 and the needle tube 6 of each electric fluid nozzle.

[0073] In this embodiment, the needle tube 6 is made of glass, which is easier to process the needle tip to a micrometer size to improve printing accuracy, and is less susceptible to electrochemical corrosion, thereby ensuring the spraying state of the needle tube 6.

[0074] Reference Figure 1 and Figure 5 Furthermore, a plurality of glue holes 21 b connected to the liquid outlet hole 21 a are provided on the side wall of the liquid outlet section 21 of the needle body 2 , and the needle tube 6 and the needle body 2 are firmly fixed by filling the glue holes 21 b with fixing glue.

[0075] The embodiment of the present application provides a modular electrofluid nozzle. Since the main body 1, the needle body 2 and the electrode assembly 3 are modularly arranged, when the needle body 2 is damaged or reaches the end of its service life, resulting in poor printing effect, the needle body 2 can be replaced with a new one by removing the needle body 2 from the main body 1, thereby ensuring the printing quality. Only the needle body 2 can be replaced without replacing the electrode assembly 3 or the main body 1, thereby reducing costs. In addition, the modular design of the main body 1, the electrode assembly 3 and the needle body 2 facilitates the separate processing of the main body 1, the electrode assembly 3 and the needle body 2, and then assembles the electrofluid nozzle to facilitate mass production and save the manufacturing cost of the electrofluid nozzle.

[0076] Furthermore, since the electrode holder 31 of the electrode assembly 3 is plugged in with the needle body 2, and the needle body 2 is plugged in with the main body 1, the assembly form of the three is simple and the assembly efficiency is high. More importantly, since the electrode wire 32 is connected to the electrode holder 31, the relative position of the electrode wire 32 and the needle body 2 can be determined by determining the relative position of the electrode holder 31 and the needle body 2. Among them, the fixed section 311 of the electrode holder 31 is plugged in with the connecting section 22 of the needle body 2 to determine the position of the electrode assembly 3 in the radial direction of the needle body 2, and the abutment section 312 of the electrode holder 31 is abutted with the end face of the connecting section 22 to determine the position of the electrode assembly 3 in the axial direction of the needle body 2. Therefore, after the needle body 2, the electrode assembly 3 and the main body 1 are assembled, the relative position of the needle body 2 and the electrode assembly 3 is determined. Even if the needle body 2 is replaced, the relative position of the electrode assembly 3 and the needle body 2 can still be guaranteed to remain unchanged, and the consistency of the electric field force on the functional fluid before and after the needle body 2 is guaranteed, thereby ensuring the printing quality. In addition, when the electrofluidic nozzles are mass-produced, since the electrode assembly 3 is positioned relative to the needle body 2, the spraying consistency of the electrofluidic nozzles in large quantities is better, and it is easier to ensure the printing accuracy.

[0077] In a second aspect, a printing device is provided, comprising the modular electrofluidic printhead as described above.

[0078] Another embodiment of the present application provides a printing device. Since the printing device includes the modular electrofluid nozzle as described above, the beneficial effects of the printing device are consistent with the beneficial effects of the modular electrofluid nozzle, which will not be repeated here.

[0079] In a third aspect, an inkjet printing system is provided, comprising the modular electrofluidic nozzle as described above, and / or the printing device as described above.

[0080] Another embodiment of the present application provides an inkjet printing system. Since the inkjet printing system includes the modular electrofluid nozzle as described above, and / or the printing device as described above, the beneficial effects of the inkjet printing system are consistent with the beneficial effects of the above-mentioned modular electrofluid nozzle and printing device, and will not be repeated here.

[0081] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0082] It should be noted that, in this application, relational terms such as "first" and "second" are only used 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. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0083] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A modular electrofluid showerhead, characterized in that: It includes: A main body, wherein one end surface of the main body is provided with a connecting hole; A needle body, the needle body comprising a liquid outlet section and a connecting section, the liquid outlet section is provided with a liquid outlet hole, the connecting section is provided with a positioning hole, the positioning hole is communicated with the liquid outlet hole, and the connecting section is inserted into the connecting hole to form a plug-in fit with the main body; An electrode assembly, the electrode assembly comprising an electrode seat and an electrode wire, the electrode wire being connected to the electrode seat, the electrode seat comprising a fixed section and an abutment section, the fixed section being inserted into the positioning hole so that the electrode seat and the needle body form a plug-in fit, the abutment section being located in the connecting hole and abutting against the end face of the connecting section, the electrode seat being used to be electrically connected to an external power supply device, and the electrode wire being passed through the liquid outlet.

2. The modular electrofluidic showerhead according to claim 1, characterized in that: The electrode seat is provided with a penetrating air hole, the air hole connects the connecting hole, the positioning hole and the liquid outlet hole, and the connecting hole is used to connect with an external air pressure regulating device.

3. The modular electrofluidic showerhead according to claim 2, characterized in that: The electrode assembly also includes a plurality of screws, which are evenly distributed in a circle around the center line of the electrode seat, and the screw threads are threaded through the electrode seat. The electrode wire is threaded through the pores with a gap between the electrode wire and the pore walls. One end of each of the screws extends into the pores and presses against the electrode wire to fix and electrically connect the electrode wire to the electrode seat.

4. The modular electrofluidic showerhead according to any one of claims 1 to 3, characterized in that: A gap is left between the electrode wire and the hole wall of the liquid outlet hole, and one end of the electrode wire extends to the outlet of the liquid outlet section.

5. The modular electrofluidic showerhead according to claim 1, characterized in that: The connecting hole includes a receiving hole section, a threaded hole section and a sealing hole section, and the connecting section includes a threaded section and a matching section; the abutting section of the electrode seat is located in the receiving hole section, the threaded section is threadedly connected to the threaded hole section, and the circumferential outer side surface of the matching section is tightly attached to the hole wall of the sealing hole section.

6. The modular electrofluidic showerhead according to claim 5, characterized in that: A positioning portion is provided on the circumferential outer side of the liquid outlet section, and the main body is suitable for pressing against the positioning portion.

7. The modular electrofluidic showerhead according to claim 1 or 5, characterized in that: It also includes an elastic member, which is located in the connecting hole. Two ends of the elastic member are respectively pressed against the electrode seat and the bottom of the connecting hole. The elastic force of the elastic member presses the electrode seat against the needle body.

8. The modular electrofluidic showerhead according to claim 7, characterized in that: The main body is made of a conductive material, the needle body is made of an insulating material, the main body is used to be electrically connected to an external power supply device, and the main body is electrically connected to the electrode assembly through an elastic member.

9. The modular electrofluidic showerhead according to claim 8, characterized in that: It also includes a positioning seat, which is sleeved on the main body. The positioning seat includes a positioning surface, and the positioning surface of the positioning block is suitable for abutting against an external nozzle seat. The positioning seat is made of conductive material, and is electrically connected to the main body and the external power supply device.

10. The modular electrofluidic showerhead according to claim 1, characterized in that: It also includes a needle tube, which is inserted into the liquid outlet, and the needle tip of the needle tube is located outside the liquid outlet, and the electrode wire is inserted into the needle tube, and one end of the electrode wire extends to the needle tip of the needle tube.

11. A printing device, characterized in that: Comprising a modular electric fluid showerhead as claimed in any one of claims 1 to 10.

12. An inkjet printing system, characterized in that: It comprises the modular electrofluidic nozzle as claimed in any one of claims 1 to 10, and / or the printing device as claimed in claim 11.

Images