Split type electrofluid nozzle, jet printing device and ink-jet printing system

Abstract

The invention relates to a split type electrofluid sprayer, a jet printing device and an ink-jet printing system, and the split type electrofluid sprayer comprises a main body part which is provided with a connecting hole in one end face; the liquid supply assembly comprises a liquid supply sleeve, and the liquid supply sleeve is matched with the main body part in an inserted mode; the needle body part is inserted and matched with one end, deviating from the main body part, of the liquid supply sleeve; the electrode assembly comprises an electrode holder and an electrode wire, the electrode holder comprises a fixed section and an abutting section, the fixed section is inserted into the end, extending to the connecting hole, of the liquid supply sleeve, so that the electrode holder and the liquid supply sleeve are in insertion fit, the abutting section is located in the connecting hole and abuts against the end face of the liquid supply sleeve, and the electrode wire penetrates into the needle body part. The main body part, the needle body part, the liquid supply assembly and the electrode assembly are designed in a split mode, and when the four parts are assembled, the relative positions of the four parts are ensured to be consistent through cooperation of an inserting mode and the like, 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 split-type 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 split-type 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 split type electric fluid nozzle is provided, comprising:

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

[0009] A liquid supply assembly, the liquid supply assembly comprising a liquid supply sleeve and a liquid supply member, the liquid supply member supplies functional liquid into the liquid supply sleeve; one end of the liquid supply sleeve is inserted into the connecting hole so that the liquid supply sleeve is plugged and matched with the main body;

[0010] A needle body portion, the needle body portion is plug-fitted with an end of the liquid supply sleeve away from the main body portion;

[0011] 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 one end of the liquid supply sleeve extending to the connecting hole so that the electrode seat and the liquid supply sleeve form a plug-in fit, the abutment section being located in the connecting hole and abutting against the end face of the liquid supply sleeve, the electrode seat being used to be electrically connected to an external power supply device, and the electrode wire being passed through the needle body.

[0012] In some embodiments, the electrode assembly further comprises a plurality of screws, the plurality of screws are evenly distributed circumferentially about the center line of the electrode seat, and the screw threads are threaded through the electrode seat, and one end of the plurality of screws are pressed against the electrode wire to fix and electrically connect the electrode wire to the electrode seat.

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

[0014] In some embodiments, the connecting hole includes a receiving hole section, a first threaded hole section and a first sealing hole section; the portion of the liquid supply sleeve inserted into the main body includes a first threaded section and a first matching section;

[0015] The abutting section of the electrode seat is located in the accommodating hole section, the first threaded section is threadedly connected to the first threaded hole section, and the circumferential outer side surface of the first matching section is tightly attached to the hole wall of the first sealing hole section.

[0016] In some embodiments, the position of the liquid supply sleeve through which the needle body is inserted is a mounting hole, and the mounting hole includes a second threaded hole section and a second sealing hole section; the portion of the needle body inserted into the main body includes a second threaded section and a second matching section;

[0017] The second threaded section is threadedly connected to the second threaded hole section, and the circumferential outer side surface of the second matching section is in close contact with the hole wall of the second sealing hole section.

[0018] In some embodiments, the split type electrofluid nozzle further includes a sealing ring, which is disposed at the bottom of the mounting hole, and the needle body presses the sealing ring against the bottom of the mounting hole, and the inner ring diameter of the sealing ring is smaller than the inner hole diameter of the needle body.

[0019] In some embodiments, the split-type electrofluid nozzle also includes a needle tube, which is passed through the needle body, the liquid inlet end of the needle tube abuts against the sealing ring, the needle tip of the needle tube is located outside the needle body, 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] In some embodiments, the split-type fluid nozzle further includes an elastic member, wherein the elastic member is located in the connecting hole, and both 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 liquid supply sleeve.

[0021] In some embodiments, the main body is made of conductive material, the liquid supply sleeve and the needle body are made of 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.

[0022] In some embodiments, the liquid supply member includes:

[0023] A liquid supply pipe, one end of which is connected to the side of the liquid supply sleeve and communicated with the liquid supply sleeve, the liquid supply pipe is arranged obliquely to the liquid supply sleeve, and the height of the connection between the liquid supply pipe and the liquid supply sleeve is the lowest;

[0024] A liquid storage barrel, wherein the functional liquid is filled in the liquid storage barrel, the bottom end of the liquid storage barrel is connected to the liquid supply pipe, and the top end of the liquid storage barrel is connected to an external air supply device;

[0025] The piston is slidably disposed in the liquid storage barrel, and the circumferential side surface of the piston is in contact with the inner side surface of the liquid storage barrel. The piston is pushed by gas to squeeze the functional liquid in the liquid storage barrel.

[0026] The beneficial effects of the technical solution provided by this application include:

[0027] The embodiment of the present application provides a split type electric fluid nozzle. Since the main body, liquid supply assembly, needle body and electrode assembly are separately arranged, 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 liquid supply sleeve, thereby ensuring the printing quality. Only the needle body can be replaced without replacing the electrode assembly, liquid supply assembly or main body, thereby reducing costs.

[0028] In addition, the split design of the main body, liquid supply assembly, electrode assembly and needle body facilitates separate processing of the main body, liquid supply assembly, electrode assembly and needle body, and subsequent assembly to form an electrofluid nozzle, so as to facilitate mass production and save the manufacturing cost of the electrofluid nozzle.

[0029] Furthermore, since the electrode seat of the electrode assembly is plugged into the liquid supply sleeve, the liquid supply sleeve is plugged into the main body, and the needle body is plugged into the liquid supply sleeve, the assembly form of the four is simple and the assembly efficiency is high.

[0030] More importantly, since the electrode wire is connected to the electrode holder, the relative position of the electrode wire, the liquid supply sleeve and the needle body can be determined by determining the relative position of the electrode holder and the liquid supply sleeve. The fixed section of the electrode holder is inserted into the liquid supply sleeve to form a plug-in fit, and the position of the electrode assembly is determined in the radial direction of the liquid supply sleeve and the needle body, and the position of the electrode assembly is determined in the axial direction of the liquid supply sleeve and the needle body by the abutment of the abutment section of the electrode holder and the end face of the liquid supply sleeve. Therefore, after the needle body, the electrode assembly, the liquid supply 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 liquid before and after the needle body is replaced can be 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.

[0031] In a second aspect, a printing device is provided, comprising the split-type electrofluid nozzle as described above.

[0032] Another embodiment of the present application provides a printing device. Since the printing device includes the split-type electrofluid nozzle as described above, the beneficial effects of the printing device are consistent with the beneficial effects of the split-type electrofluid nozzle described above, which will not be repeated here.

[0033] In a third aspect, an inkjet printing system includes the split electrofluid nozzle as described above, and / or the printing device as described above.

[0034] Another embodiment of the present application provides an inkjet printing system. Since the inkjet printing system includes the split electric fluid 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 split electric fluid nozzle and the printing device as described above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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.

[0036] Figure 1 A schematic diagram of a split-type electric fluid nozzle provided in an embodiment of the present application;

[0037] Figure 2 An internal schematic diagram of a split-type electric fluid nozzle provided in an embodiment of the present application;

[0038] Figure 3 for Figure 2 Partial schematic diagram in;

[0039] Figure 4 A partial exploded view of a split-type electric fluid nozzle provided in an embodiment of the present application;

[0040] Figure 5 A schematic diagram of a needle body, a liquid supply sleeve and an electrode assembly provided in an embodiment of the present application.

[0041] In the figure: 1, main body; 1a, connecting hole; 1a1, accommodating hole section; 1a2, first threaded hole section; 1a3, first sealing hole section; 2, liquid supply assembly; 21, liquid supply sleeve; 211, first threaded section; 212, first matching section; 21a, mounting hole; 21a1, second threaded hole section; 21a2, second sealing hole section; 21b, first step surface; 22, liquid supply part; 221, liquid supply pipe; 222, liquid storage barrel; 223, piston; 3, needle body; 31, second threaded section; 32, second matching section; 3a, second step surface; 3b, glue hole; 4, electrode assembly; 41, electrode seat; 411, fixing section; 412, abutting section; 42, electrode wire; 43, screw; 5, sealing ring; 6, needle tube; 7, elastic member; 8, positioning seat. DETAILED DESCRIPTION

[0042] 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.

[0043] The embodiment of the present application provides a split-type electrofluid nozzle, a printing device and an inkjet printing system, wherein the main body, the needle body, the liquid supply assembly and the electrode assembly are designed in a split type, and when the four are assembled, the relative positions of the four 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.

[0044] Reference Figure 1-Figure 3 A split type electric fluid nozzle comprises a main body 1, a liquid supply assembly 2, a needle body 3 and an electrode assembly 4. The liquid supply assembly 2 comprises a liquid supply sleeve 21, and the electrode assembly 4 comprises an electrode holder 41 and an electrode wire 42 fixed to each other. The electrode holder 41 is inserted at one end of the liquid supply sleeve 21, and is placed in the liquid supply sleeve 21 and the main body 1 as the liquid supply sleeve 21 is inserted and matched with the main body 1. The needle body 3 is plugged and matched with the liquid supply sleeve 21. In order to realize the split arrangement of the main body 1, the liquid supply assembly 2, the needle body 3 and the electrode assembly 4, the main body 1, the liquid supply assembly 2, the needle body 3 and the electrode assembly 4 are assembled in the form of plug-in.

[0045] Since the main body 1, the liquid supply assembly 2, the needle body 3 and the electrode assembly 4 are separately arranged, when the needle body 3 is damaged or reaches the end of its service life, resulting in poor printing effect, the needle body 3 can be replaced with a new one by removing the needle body 3 from the liquid supply sleeve 21, thereby ensuring the printing quality. Only the needle body 3 can be replaced without replacing the electrode assembly 4, the liquid supply assembly 2 or the main body 1, thereby reducing the cost.

[0046] In addition, the split design of the main body 1, liquid supply assembly 2, electrode assembly 4 and needle body 3 facilitates separate processing of the main body 1, liquid supply assembly 2, electrode assembly 4 and needle body 3, and then assembles them into an electrofluid nozzle, so as to facilitate mass production and save the manufacturing cost of the electrofluid nozzle.

[0047] Reference Figure 1-Figure 3 Furthermore, since the electrode holder 41 of the electrode assembly 4 is plugged into the liquid supply sleeve 21, the liquid supply sleeve 21 is plugged into the main body 1, and the needle body 3 is plugged into the liquid supply sleeve 21, the assembly form of the four is simple and the assembly efficiency is high.

[0048] Reference Figure 1-Figure 3, wherein a connecting hole 1a is provided at one end of the main body 1, and one end of the liquid supply sleeve 21 is inserted into the connecting hole 1a to be plugged with the main body 1. The hole section inside the end of the liquid supply sleeve 21 away from the main body 1 is the mounting hole 21a, and one end of the needle body 3 is inserted into the mounting hole 21a to be plugged with the liquid supply sleeve 21. In this way, the main body 1, the liquid supply sleeve 21 and the needle body 3 are separated and detachably connected. It is convenient to replace the needle body 3, and it is convenient to replace the needle body 3 that does not meet the printing requirements, so as to ensure the printing quality.

[0049] It should be noted that if the needle body 3 is damaged or contaminated, the needle body 3 needs to be replaced.

[0050] Reference Figure 1-Figure 3 , wherein the electrode holder 41 includes a fixed section 411 and an abutting section 412, the electrode wire 42 is connected to the abutting section 412, and the electrode passes through the liquid supply sleeve 21 and is inserted into the needle body 3. The fixed section 411 is inserted into one end of the liquid supply sleeve 21 extending to the connecting hole 1a, so that the electrode holder 41 and the liquid supply sleeve 21 form a plug-in fit. In this embodiment, the circumferential outer side surface of the abutting fixed section 411 is in contact with the circumferential inner side surface of the liquid supply sleeve 21 to determine the radial position of the electrode holder 41 in the liquid supply sleeve 21.

[0051] Reference Figure 2-Figure 5 The abutting section 412 is located in the connecting hole 1a and abuts against the end surface of the liquid supply sleeve 21 to determine the axial position of the electrode holder 41 in the liquid supply sleeve 21. In this embodiment, the electrode holder 41 is integrally formed, and for the convenience of introduction, the electrode holder 41 is divided into a fixing section 411 and an abutting section 412.

[0052] In this way, the radial and axial positions of the electrode holder 41 on the liquid supply sleeve 21 are determined to ensure the installation accuracy of the electrode holder 41 on the liquid supply sleeve 21, and to ensure that the relative positions of the electrode holder 41 and the liquid supply sleeve 21 are consistent each time the electrode holder 41 and the liquid supply sleeve 21 are assembled, thereby ensuring that the consistency of large batches of electric fluid nozzles is better when electric fluid nozzles are mass-produced.

[0053] Reference Figure 1-Figure 3 Furthermore, since the electrode holder 41 is connected to the electrode wire 42, after determining the position of the electrode holder 41 relative to the liquid supply sleeve 21, the position of the electrode wire 42 relative to the liquid supply sleeve 21 can be determined. And the needle body 3 is plugged into the liquid supply sleeve 21 to determine the relative position of the needle body 3 and the liquid supply sleeve 21. Therefore, the position of the electrode wire 42 relative to the needle body 3 is also determined. After replacing the needle body 3, the relative position of the needle body 3 and the electrode wire 42 remains unchanged before and after replacement, and the electric field force exerted on the functional liquid in the needle body 3 does not change, thereby ensuring the printing quality. Even if the printing point of the electrofluid nozzle needs to be calibrated, the calibration efficiency is higher.

[0054] The electrode holder 41 is used to be electrically connected to an external power supply device. By supplying voltage to the electrode holder 41 , the voltage is transmitted to the electrode wire 42 , and the electrode wire 42 is used to apply an electric field force to the functional fluid at the outlet of the needle body 3 .

[0055] Reference Figure 2-Figure 4 , wherein the electrode assembly 4 further includes a plurality of screws 43, the plurality of screws 43 are evenly distributed around the center line of the electrode holder 41, and the screws 43 are threadedly penetrated through the electrode holder 41. In this embodiment, the screws 43 are penetrated through the abutment section 412. The electrode wire 42 is penetrated through the electrode holder 41, and a gap is left between the electrode holder 41. In this embodiment, the center line of the electrode wire 42 is consistent with that of the electrode holder 41.

[0056] One end of each of the plurality of screw rods 43 is pressed against the electrode wire 42, so that the electrode wire 42 is fixed and electrically connected to the electrode holder 41. In this embodiment, the screw rods 43 include two, and the two screw rods 43 face and clamp the electrode wire 42.

[0057] In this arrangement, the electrode wire 42 is clamped by tightening the screw 43, and the electrode wire 42 is electrically connected to the electrode holder 41 through the screw 43, so as to improve the electrical connection stability between the electrode wire 42 and the electrode holder 41, and the generated electric field force is more stable, thereby ensuring the printing quality. In addition, by changing the clamping position of the electrode wire 42 by multiple screws 43, the relative position of the electrode wire 42 and the electrode holder 41 is adjusted to ensure that the relative position of the electrode wire 42 and the electrode holder 41 is consistent each time the electrode wire 42 and the electrode holder 41 are assembled. In this embodiment, the electrode wire 42 is adjusted to be consistent with the center line of the electrode holder 41.

[0058] In this embodiment, the screw rod 43 includes a top screw.

[0059] There is a gap between the electrode wire 42 and the inner wall of the needle body 3 , and one end of the electrode wire 42 extends to the outlet of the needle body 3 .

[0060] In this arrangement, the electrode wire 42 does not contact the inner wall of the needle body 3, so as to avoid mutual influence between the electrode wire 42 and the needle body 3, ensure the conductivity of the electrode wire 42, and ensure the surface roughness of the inner wall of the needle body 3, so as to ensure the normal operation of the electrofluid nozzle. By extending one end of the electrode wire 42 to the outlet of the needle body 3, and applying voltage to the functional liquid 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 adjusted later.

[0061] Reference Figure 2-Figure 4 The connecting hole 1a includes a receiving hole section 1a1, a first threaded hole section 1a2 and a first sealing hole section 1a3. The portion of the liquid supply sleeve 21 inserted into the main body 1 includes a first threaded section 211 and a first matching section 212.

[0062] Reference Figure 2-Figure 4 The abutting section 412 of the electrode holder 41 is located in the receiving hole section 1a1. In this embodiment, a gap is left between the circumferential outer side surface of the abutting section 412 and the hole wall of the receiving hole section 1a1, so as to facilitate the placement of the electrode holder 41 in the receiving hole section 1a1 and reduce the difficulty of assembly.

[0063] The first threaded section 211 is threadedly connected with the first threaded hole section 1a2, and the circumferential outer side surface of the first matching section 212 is in close contact with the hole wall of the first sealing hole section 1a3. Since there is still an assembly gap in the threaded connection between the first threaded section 211 and the first threaded hole section 1a2, the plug-in matching of the first matching section 212 and the first sealing hole section 1a3 is provided to ensure the sealing of the connection between the liquid supply sleeve 21 and the main body 1, reduce the risk of liquid leakage and gas leakage, and keep the air pressure environment inside the liquid supply sleeve 21 and the needle body 3 stable.

[0064] In this way, the liquid supply sleeve 21 and the main body 1 are connected by threads, which not only facilitates the disassembly and assembly of the liquid supply sleeve 21 and the main body 1, but also improves the connection strength between the liquid supply sleeve 21 and the main body 1, and utilizes the cooperation of the first matching section 212 and the first sealing hole section 1a3 to improve the connection sealing at the connection between the liquid supply sleeve 21 and the main body 1.

[0065] Reference Figure 2-Figure 4 Furthermore, a first step surface 21b is provided on the circumferential side of the liquid supply sleeve 21. After the main body 1 is plugged into the liquid supply sleeve 21, one end surface of the main body 1 is pressed against the first step surface 21b.

[0066] By arranging the first step surface 21b for the main body 1 to press against, not only the threaded connection between the main body 1 and the liquid supply sleeve 21 is locked, but also the relative position of the main body 1 and the liquid supply sleeve 21 after connection can be positioned, thereby improving the consistency of each assembly of the liquid supply sleeve 21 and the main body 1.

[0067] Reference Figure 2-Figure 4 The installation hole 21a of the liquid supply sleeve 21 through which the needle body 3 passes includes a second threaded hole section 21a1 and a second sealing hole section 21a2. The portion of the needle body 3 inserted into the main body 1 includes a second threaded section 31 and a second matching section 32.

[0068] Reference Figure 2-Figure 4 The second threaded section 31 is threadedly connected with the second threaded hole section 21a1, and the circumferential outer side surface of the second matching section 32 is tightly attached to the hole wall of the second sealing hole section 21a2. Since there is still an assembly gap in the threaded connection between the second threaded section 31 and the second threaded hole section 21a1, the plug-in matching of the second matching section 32 and the second sealing hole section 21a2 is provided to ensure the sealing of the connection between the liquid supply sleeve 21 and the needle body 3, reduce the risk of liquid leakage and gas leakage, and keep the air pressure environment inside the liquid supply sleeve 21 and the needle body 3 stable.

[0069] In this way, the liquid supply sleeve 21 and the needle body 3 are connected by a thread, which not only facilitates the disassembly and assembly of the liquid supply sleeve 21 and the needle body 3, but also improves the connection strength between the liquid supply sleeve 21 and the needle body 3, and utilizes the cooperation of the second matching section 32 and the second sealing hole section 21a2 to improve the connection sealing at the connection between the liquid supply sleeve 21 and the needle body 3. The connection strength and sealing are ensured after the needle body 3 is replaced.

[0070] Reference Figure 2-Figure 4 Furthermore, a second step surface 3a is provided on the circumferential side of the needle body 3. After the needle body 3 is plugged into and matched with the liquid supply sleeve 21, one end surface of the liquid supply sleeve 21 is pressed against the second step surface 3a.

[0071] By arranging the second step surface 3a for the liquid supply sleeve 21 to press against, not only the threaded connection between the needle body 3 and the liquid supply sleeve 21 is locked, but also the relative position of the needle body 3 and the liquid supply sleeve 21 after connection can be positioned, thereby improving the consistency of each assembly of the liquid supply sleeve 21 and the needle body 3. Since the electrode assembly 4 is positioned by plugging with the liquid supply sleeve 21, the relative position consistency of the electrode assembly 4 and the needle body 3 is better each time they are assembled, so after the needle body 3 is replaced, the electric field force on the functional liquid in the needle body 3 is more consistent.

[0072] The split type electric fluid nozzle also includes a sealing ring 5, which is arranged at the bottom of the mounting hole 21a, and the needle body 3 presses the sealing ring 5 against the bottom of the mounting hole 21a. The inner ring diameter of the sealing ring 5 is smaller than the inner hole diameter of the needle body 3.

[0073] In this way, by providing a sealing ring 5 at the bottom of the mounting hole 21 a , the sealing performance of the connection between the liquid supply sleeve 21 and the needle body 3 is further improved.

[0074] Reference Figure 3-Figure 5 The split type electrofluid nozzle further comprises a needle tube 6, which is passed through the needle body 3, the needle tip of the needle tube 6 is located outside the needle body 3, the electrode wire 42 is passed through the needle tube 6, and one end of the electrode wire 42 extends to the needle tip of the needle tube 6.

[0075] The needle tube 6 is used to replace the needle body 3 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 3. On the other hand, the needle tube 6 and the needle body 3 are manufactured separately and then assembled, which makes it easier to ensure processing efficiency and quality, and is more suitable for mass production needs.

[0076] Reference Figure 3-Figure 5 Furthermore, the liquid inlet end of the needle tube 6 abuts against the sealing ring 5 to position the installation position of the needle tube 6 relative to the needle body 3, ensuring better consistency in the relative position of the needle body 3 and the needle tube 6 of each electric fluid nozzle.

[0077] 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.

[0078] Reference Figure 3-Figure 5 Furthermore, a plurality of glue holes 3b are provided on the side wall of the needle body 3, and the glue holes 3b are connected to the interior of the needle body 3, and the needle tube 6 and the needle body 3 are firmly fixed by filling the glue holes 3b with fixing glue.

[0079] Reference Figure 2-Figure 4 , wherein the split type electric fluid nozzle further comprises an elastic member 7, the elastic member 7 is located in the connection hole 1a, and the two ends of the elastic member 7 are respectively pressed against the electrode holder 41 and the bottom of the connection hole 1a. In this embodiment, the elastic member 7 is located in the receiving hole section 1a1. The elastic force of the elastic member 7 presses the electrode holder 41 against the liquid supply sleeve 21. In this embodiment, the elastic member 7 comprises a spring.

[0080] With this arrangement, the elastic member 7 can also be removed along with the disassembly of the liquid supply sleeve 21, the main body 1 and the electrode assembly 4, thereby improving the assembly flexibility of the electrofluid nozzle. The elastic force of the elastic member 7 presses against the electrode holder 41, ensuring that the relative position of the electrode holder 41 and the liquid supply sleeve 21 is fixed and not prone to relative change. This ensures both assembly accuracy and power supply stability of the electrode assembly 4 during printing.

[0081] Furthermore, the main body 1 is made of conductive material, the liquid supply sleeve 21 and the needle body 3 are made of 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 4 through the elastic member 7.

[0082] In this arrangement, the voltage is introduced to the electrode assembly 4 by using the main body 1, and there is no need to arrange a wiring structure in the main body 1, the liquid supply sleeve 21, and the needle body 3 to electrically connect the electrode assembly 4, thereby simplifying the structure of the electric fluid nozzle. The main body 1 and the electrode assembly 4 are electrically connected through the elastic member 7. Due to the elastic force of the elastic member 7, the elastic member 7 is stably pressed against the main body 1 and the electrode assembly 4, thereby ensuring the stability of the electrical connection between the main body 1 and the electrode assembly 4. It should be noted that the elastic member 7 is made of a conductive material.

[0083] Since the needle body 3 and the liquid supply sleeve 21 contain functional liquid and are provided with electrode wires 42, the needle body 3 and the liquid supply sleeve 21 are made of insulating materials, and the needle body 3 and the liquid supply sleeve 21 are not easily corroded by electrochemical means, so as to increase the service life of the needle body 3 and the liquid supply sleeve 21 and ensure the printing effect of the needle body 3. In addition, the needle body 3 will not discharge and cause electric field crosstalk to the functional liquid, so as to ensure the printing accuracy.

[0084] Reference Figure 2-Figure 4 Optionally, the modularized electrofluid nozzle further comprises a positioning seat 8, which is sleeved on the main body 1, and the positioning seat 8 comprises a positioning surface. In this embodiment, the top surface and the bottom surface of the positioning seat 8 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 8 is made of a conductive material, and the positioning seat 8 is electrically connected to the main body 1, and the positioning seat 8 is electrically connected to the external power supply device.

[0085] With this arrangement, the arrangement of the positioning seat 8 not only facilitates the rapid and accurate installation of the fluid nozzle on the nozzle seat, but also utilizes the positioning seat 8 to be electrically connected to the power supply device, making it convenient to lead the voltage to the main body 1 and then to the electrode assembly 4, so that the form of powering the electrode assembly 4 is more flexible.

[0086] Reference Figure 1-Figure 4 The liquid supply assembly 2 further comprises a liquid supply part 22 for supplying functional liquid to the liquid supply sleeve 21. The liquid supply part 22 comprises a liquid supply pipe 221, a liquid storage barrel 222 and a piston 223.

[0087] Reference Figure 1-Figure 4 One end of the liquid supply tube 221 is connected to the side of the liquid supply sleeve 21 and communicates with the liquid supply sleeve 21. In this embodiment, the liquid supply tube 221 and the liquid supply sleeve 21 are integrally formed. The liquid supply tube 221 is arranged obliquely to the liquid supply sleeve 21, and the height of the connection between the liquid supply tube 221 and the liquid supply sleeve 21 is the lowest, so that the functional liquid in the liquid supply tube 221 can flow into the liquid supply sleeve 21.

[0088] Reference Figure 1-Figure 4 The liquid storage barrel 222 is filled with functional liquid, and the bottom end of the liquid storage barrel 222 is connected to the liquid supply pipe 221. In this embodiment, the liquid storage barrel 222 and the end of the liquid supply pipe 221 away from the liquid supply sleeve 21 are plugged together and can be threadedly connected.

[0089] Reference Figure 1-Figure 4 The piston 223 is slidably disposed in the liquid storage barrel 222, and the circumferential side of the piston 223 is attached to the inner side of the liquid storage barrel 222. The top of the liquid storage barrel 222 is connected to the external gas supply device, and the piston 223 is pushed by the gas to squeeze the functional liquid in the liquid storage barrel 222.

[0090] With this arrangement, gas is supplied into the liquid storage barrel 222 to push the piston 223 to squeeze the functional liquid, and the functional liquid is squeezed into the liquid supply tube 221 and the liquid supply sleeve 21 to supply the functional liquid into the needle body 3, thereby supporting long-term printing.

[0091] In addition, the interior of the needle body 3 is connected to the liquid storage barrel 222 through the liquid supply sleeve 21 and the liquid supply tube 221, so that the functional liquid in the needle body 3 can be pressed down by the piston 223 to provide pressure to the functional liquid in the needle body 3 to meet the required pressure environment in the needle body 3.

[0092] The embodiment of the present application provides a split type electric fluid nozzle. Since the main body 1, the liquid supply assembly 2, the needle body 3 and the electrode assembly 4 are separately arranged, when the needle body 3 is damaged or reaches the end of its service life, resulting in poor printing effect, the needle body 3 can be replaced with a new one by removing the needle body 3 from the liquid supply sleeve 21, thereby ensuring the printing quality. Only the needle body 3 can be replaced without replacing the electrode assembly 4, the liquid supply assembly 2 or the main body 1, thereby reducing the cost.

[0093] In addition, the split design of the main body 1, liquid supply assembly 2, electrode assembly 4 and needle body 3 facilitates separate processing of the main body 1, liquid supply assembly 2, electrode assembly 4 and needle body 3, and then assembles them into an electrofluid nozzle, so as to facilitate mass production and save the manufacturing cost of the electrofluid nozzle.

[0094] Furthermore, since the electrode holder 41 of the electrode assembly 4 is plugged into the liquid supply sleeve 21, the liquid supply sleeve 21 is plugged into the main body 1, and the needle body 3 is plugged into the liquid supply sleeve 21, the assembly form of the four is simple and the assembly efficiency is high.

[0095] More importantly, since the electrode wire 42 is connected to the electrode holder 41, the relative position of the electrode holder 41 and the liquid supply sleeve 21 can be determined by determining the relative position of the electrode wire 42, the liquid supply sleeve 21 and the needle body 3. The fixed section 411 of the electrode holder 41 is inserted into the liquid supply sleeve 21 to form a plug-in fit, and the position of the electrode assembly 4 is determined in the radial direction of the liquid supply sleeve 21 and the needle body 3, and the abutment section 412 of the electrode holder 41 is abutted against the end surface of the liquid supply sleeve 21 to determine the position of the electrode assembly 4 in the axial direction of the liquid supply sleeve 21 and the needle body 3. Therefore, after the needle body 3, the electrode assembly 4, the liquid supply assembly 2 and the main body 1 are assembled, the relative position of the needle body 3 and the electrode assembly 4 is determined. Even if the needle body 3 is replaced, the relative position of the electrode assembly 4 and the needle body 3 can still be guaranteed to remain unchanged, and the consistency of the electric field force on the functional liquid before and after the needle body 3 is replaced is guaranteed, thereby ensuring the printing quality. In addition, when the electrofluidic nozzles are mass-produced, since the electrode assembly 4 is positioned relative to the needle body 3, the spraying consistency of the electrofluidic nozzles in large quantities is better, and it is easier to ensure the printing accuracy.

[0096] In a second aspect, a printing device is provided, comprising the split-type electrofluid nozzle as described above.

[0097] Another embodiment of the present application provides a printing device. Since the printing device includes the split-type electrofluid nozzle as described above, the beneficial effects of the printing device are consistent with the beneficial effects of the split-type electrofluid nozzle described above, which will not be repeated here.

[0098] In a third aspect, an inkjet printing system includes the split electrofluid nozzle as described above, and / or the printing device as described above.

[0099] Another embodiment of the present application provides an inkjet printing system. Since the inkjet printing system includes the split electric fluid 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 split electric fluid nozzle and the printing device as described above, and will not be repeated here.

[0100] 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.

[0101] 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.

[0102] 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 split type electric fluid nozzle, characterized in that: It includes: A main body, wherein one end surface of the main body is provided with a connecting hole; A liquid supply assembly, the liquid supply assembly comprising a liquid supply sleeve and a liquid supply member, the liquid supply member supplies functional liquid into the liquid supply sleeve; one end of the liquid supply sleeve is inserted into the connecting hole so that the liquid supply sleeve is plugged and matched with the main body; A needle body portion, the needle body portion is plug-fitted with an end of the liquid supply sleeve away from the main body portion; 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 one end of the liquid supply sleeve extending to the connecting hole so that the electrode seat and the liquid supply sleeve form a plug-in fit, the abutment section being located in the connecting hole and abutting against the end face of the liquid supply sleeve, the electrode seat being used to be electrically connected to an external power supply device, and the electrode wire being passed through the needle body.

2. The split type electric fluid nozzle according to claim 1, characterized in that: The electrode assembly also includes a plurality of screws, which are evenly distributed around the center line of the electrode seat and are threadedly passed through the electrode seat. One end of each of the screws is pressed against the electrode wire to fix and electrically connect the electrode wire to the electrode seat.

3. The split type electric fluid nozzle according to claim 1 or 2, characterized in that: A gap is left between the electrode wire and the inner wall of the needle body, and one end of the electrode wire extends to the outlet of the needle body.

4. The split type electric fluid nozzle according to claim 1, characterized in that: The connecting hole includes a receiving hole section, a first threaded hole section and a first sealing hole section; the portion of the liquid supply sleeve inserted into the main body includes a first threaded section and a first matching section; The abutting section of the electrode seat is located in the accommodating hole section, the first threaded section is threadedly connected to the first threaded hole section, and the circumferential outer side surface of the first matching section is tightly attached to the hole wall of the first sealing hole section.

5. The split type electric fluid nozzle according to claim 1 or 4, characterized in that: The position of the liquid supply sleeve for the needle body to pass through is a mounting hole, and the mounting hole includes a second threaded hole section and a second sealing hole section; the portion of the needle body inserted into the main body includes a second threaded section and a second matching section; The second threaded section is threadedly connected to the second threaded hole section, and the circumferential outer side surface of the second matching section is in close contact with the hole wall of the second sealing hole section.

6. The split type electric fluid nozzle according to claim 5, characterized in that: It also includes a sealing ring, which is arranged at the bottom of the installation hole. The needle body presses the sealing ring against the bottom of the installation hole, and the inner ring diameter of the sealing ring is smaller than the inner hole diameter of the needle body.

7. The split type electric fluid nozzle according to claim 6, characterized in that: It also includes a needle tube, which is inserted into the needle body, the liquid inlet end of the needle tube abuts against the sealing ring, the needle tip of the needle tube is located outside the needle body, 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.

8. The split type electric fluid nozzle according to claim 1 or 4, 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 liquid supply sleeve.

9. The split type electric fluid nozzle according to claim 8, characterized in that: The main body is made of conductive material, the liquid supply sleeve and the needle body are made of 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.

10. The split type electric fluid nozzle according to claim 1, characterized in that: The liquid supply part comprises: A liquid supply pipe, one end of which is connected to the side of the liquid supply sleeve and communicated with the liquid supply sleeve, the liquid supply pipe is arranged obliquely to the liquid supply sleeve, and the height of the connection between the liquid supply pipe and the liquid supply sleeve is the lowest; A liquid storage barrel, wherein the functional liquid is filled in the liquid storage barrel, the bottom end of the liquid storage barrel is connected to the liquid supply pipe, and the top end of the liquid storage barrel is connected to an external air supply device; The piston is slidably disposed in the liquid storage barrel, and the circumferential side surface of the piston is in contact with the inner side surface of the liquid storage barrel. The piston is pushed by gas to squeeze the functional liquid in the liquid storage barrel.

11. A printing device, characterized in that: It comprises a split-type electric fluid spray head as claimed in any one of claims 1 to 10.

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

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