Easy-to-maintain inkjet printer printhead

Abstract

This application relates to the field of inkjet printing technology and provides an easy-to-maintain inkjet printer printhead, including a solenoid valve assembly, a nozzle assembly, and an ink droplet control assembly. The solenoid valve assembly includes at least one solenoid valve, each solenoid valve including a separable valve head, valve body, valve core, and coil. The valve head is fixed to the plane of the printhead's semi-circular base. The lower end of the valve body is connected to the valve head by a screw, and the upper end of the valve body is threaded. The valve core is located in the hollow channel of the valve body, and the coil is wrapped around the outer wall of the valve body. The coil is fixed to the valve body by a nut. This application eliminates the valve connection module, reducing potential problems caused by sealing issues in redundant connections. The valve head, valve body, valve core, and coil in the solenoid valve are all separable. The coil and valve body, and the valve body and valve head are fixedly connected by screws and nuts. The valve core can be quickly disassembled and cleaned for maintenance, thereby reducing maintenance difficulty and workload and improving maintenance efficiency.

Description

Technical Field

[0001] This application belongs to the field of inkjet printing technology, and in particular relates to an easy-to-maintain inkjet printer printhead. Background Technology

[0002] Inkjet printers print by atomizing liquid ink into tiny particles and spraying them onto paper. If an inkjet printer is not used for an extended period, the printhead, immersed in ink, is prone to clogging. Most printheads can be repaired through cleaning and maintenance. However, when clogging occurs, the solenoid valve in the printhead may dry out after prolonged shutdown. Since the valve core is difficult to disassemble, cleaning becomes challenging. This defect makes inkjet printer printhead maintenance difficult, inefficient, and labor-intensive, often resulting in poor cleaning outcomes and ultimately affecting print quality.

[0003] In addition, the solenoid valves on traditional inkjet printer printheads are usually assembled together with valve connection modules, and then connected to the nozzles through valve connection modules. This structure is complex, and the various connections increase the risk of sealing failure. Summary of the Invention

[0004] This application provides an easy-to-maintain inkjet printer printhead that can solve the problems of numerous potential sealing issues and high maintenance difficulty in inkjet printer printheads.

[0005] Based on this, the present invention adopts the following technical solution:

[0006] This application provides an easy-to-maintain inkjet printer printhead, characterized in that the inkjet printer printhead includes a printhead tubing connector and a printhead semi-circular base located behind the printhead tubing connector, and a solenoid valve assembly, a nozzle assembly and an ink droplet control assembly are sequentially fixed on the plane of the printhead semi-circular base.

[0007] The solenoid valve assembly is connected to the printhead pipeline connector and the nozzle assembly respectively, and the ink droplet control assembly is correspondingly provided with the nozzle assembly;

[0008] The solenoid valve assembly includes at least one solenoid valve, each of the solenoid valves including a separable valve head, valve body, valve core and coil;

[0009] The valve head is fixed on the plane of the semi-circular base of the nozzle; the valve body has an inverted T-shaped cross-section and a hollow structure; the lower end of the valve body is connected to the valve head by a screw, and the upper end of the valve body is threaded.

[0010] The valve core is located in the hollow channel of the valve body, the coil is wrapped around the outer wall of the valve body, and the coil is fixed to the valve body by a nut.

[0011] In one embodiment, the nozzle assembly includes a nozzle adjusting bracket and a nozzle;

[0012] The nozzle adjusting bracket is fixed on the plane of the semi-circular base of the nozzle, and the nozzle is mounted on the nozzle adjusting bracket.

[0013] In one embodiment, the droplet control assembly includes a charging electrode, a phase detection board, and a high-voltage board;

[0014] The upper end of the charging electrode is provided with a slot, which corresponds to the outlet of the nozzle;

[0015] The high-voltage plate and the phase detection plate are arranged side by side, and the space between the high-voltage plate and the phase detection plate corresponds to the slot.

[0016] In one embodiment, an ink line recovery groove is also fixed on the plane of the printhead semi-circular base, and the ink line recovery groove is located behind the ink droplet control component;

[0017] The ink line recovery tank is equipped with a bent tube, the opening of which corresponds to the nozzle outlet.

[0018] In one embodiment, the nominal diameter of the solenoid valve is 15 mm.

[0019] In one embodiment, the solenoid valve assembly includes an ink supply solenoid valve;

[0020] The printhead pipe connector is equipped with an ink supply pipe, and the ink supply solenoid valve is connected to the ink cartridge through the ink supply pipe.

[0021] In one embodiment, the ink supply solenoid valve has an inkjet channel on its valve head, and the ink supply solenoid valve is connected to the nozzle assembly through the inkjet channel.

[0022] In one embodiment, the solenoid valve assembly further includes a drain solenoid valve;

[0023] The nozzle pipe connector is also provided with a vent pipe, and the vent solenoid valve is connected to the return pipe through the vent pipe.

[0024] In one embodiment, the valve head of the venting solenoid valve is provided with a venting pipe, and the venting solenoid valve is connected to the nozzle assembly through the venting pipe.

[0025] In one embodiment, the nozzle pipe connector is also provided with a positive air pipe.

[0026] The beneficial effects of this utility model are:

[0027] The valve connection module was eliminated, and large solenoid valves were used directly as ink supply solenoid valves and venting solenoid valves. Both ink supply solenoid valves and venting solenoid valves are directly connected to the nozzle assembly, which simplifies the structure and reduces the potential risks caused by sealing problems in redundant connections.

[0028] The large solenoid valve has the characteristic of rapid opening and closing, and can complete the opening and closing of ink supply and air pressure in a short time to meet the needs of inkjet printers.

[0029] The valve head, valve body, valve core, and coil in the solenoid valve can all be separated. The coil and valve body, as well as the valve body and valve head, are fixed and connected by screws and nuts, replacing the traditional welding method. This allows for repeated disassembly and assembly of the electrical connection, and the valve core can be quickly disassembled and cleaned for maintenance, thereby reducing maintenance difficulty and workload and improving maintenance efficiency. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of an easy-to-maintain inkjet printer printhead provided in one embodiment of this application;

[0032] Figure 2 This is an exploded schematic diagram of a solenoid valve in an inkjet printer printhead that is easy to maintain, according to an embodiment of this application.

[0033] Legend:

[0034] 1. Printhead tubing connector; 2. Printhead semi-circular base; 3. Solenoid valve assembly; 4. Nozzle assembly; 5. Droplet control assembly; 31. Ink supply solenoid valve; 32. Drain solenoid valve; 41. Nozzle adjustment bracket; 42. Nozzle; 51. Charging electrode; 52. Phase detection board; 53. High voltage board; 61. Ink line recovery trough; 62. Bend; 71. Ink supply tubing; 72. Drain tubing; 73. Inkjet tubing; 74. Drain tubing; 8. Positive air pipe; 311. Valve head; 312. Valve body; 313. Valve core; 314. Coil; 315. Screw; 316. Nut. Detailed Implementation

[0035] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0036] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0037] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0039] This application provides an easy-to-maintain inkjet printer printhead, see [link to relevant documentation]. Figure 1 The inkjet printer printhead includes a printhead tube connector 1 and a printhead semi-circular base 2 located behind the printhead tube connector 1, wherein the printhead tube connector 1 and the printhead semi-circular base 2 are through hollow structures.

[0040] In this embodiment, a solenoid valve assembly 3, a nozzle assembly 4, and an ink droplet control assembly 5 are fixed sequentially from front to back on the plane of the printhead semi-circular base 2. The solenoid valve assembly 3 is connected to the printhead pipeline connector 1 and the nozzle assembly 4 respectively, and the ink droplet control assembly 5 is correspondingly arranged with the nozzle assembly 4.

[0041] Furthermore, the solenoid valve assembly 3 includes at least one solenoid valve, specifically, see [link to documentation]. Figure 1 The solenoid valve assembly 3 includes an ink supply solenoid valve 31 and a venting solenoid valve 32. The ink supply solenoid valve 31 is used to control the on / off state and flow rate of the ink supply, ensuring that the inkjet printer printhead accurately picks up ink; the venting solenoid valve 32 is used to discharge excess air or residual ink from various pipelines to prevent blockages and abnormal pressure.

[0042] As an example, see Figure 2 Taking the ink supply solenoid valve 31 as an example, the solenoid valve includes a separable valve head 311, a valve body 312, a valve core 313, and a coil 314. The valve head 311 is fixed on the plane of the printhead semi-circular base 2, while the valve body 312, valve core 313, and coil 314 do not directly contact the printhead semi-circular base 2, but are fixed on the valve head 311.

[0043] Specifically, the valve body 312 has an inverted T-shaped cross-section and a hollow structure. The lower end of the valve body 312 is connected to the valve head 311 via a screw 315, and the upper end of the valve body 312 is threaded. The valve core 313 is located within the hollow channel of the valve body 312, and the coil 315 is wrapped around the outer wall of the valve body 312. Figure 2 As shown, the coil 315 is designed as a hollow cylindrical shell with a protective cover on the outermost layer. It is directly fitted onto the valve body 312, and then the coil 315 and the valve body 312 are fixed by the nut 316.

[0044] In one feasible embodiment, the solenoid valve in solenoid valve assembly 3 is selected as a large solenoid valve with a nominal diameter of 15 mm.

[0045] Furthermore, the nozzle assembly 4 includes a nozzle adjusting bracket 41 and a nozzle 42. The nozzle adjusting bracket 41 is fixed on the plane of the printhead semi-circular base 2, and the nozzle 42 is mounted on the nozzle adjusting bracket 41. The nozzle adjusting bracket 41 is used to mechanically adjust the height and angle of the nozzle 42; the nozzle 42 is used to spray ink into ink streams formed by ink droplets.

[0046] Furthermore, the droplet control assembly 5 includes a charging electrode 51, a phase detection plate 52, and a high-voltage plate 53. The upper end of the charging electrode 51 is provided with a slot, which corresponds to the nozzle outlet of the nozzle 42. That is, the ink line ejected by the nozzle 42 passes through the slot. The charging electrode 51 is used to apply a certain amount of electricity to some of the ink droplets that pass through the slot of the charging electrode 51 to obtain charged ink droplets and uncharged ink droplets. The amount of electricity carried by each charged ink droplet is controlled by the printing signal of the inkjet printer.

[0047] In one feasible embodiment, the phase detection plate 52 and the high-voltage plate 53 are arranged side by side, with the space between them corresponding to the slot in the charging electrode 51. The phase detection plate 52 detects the phase (time and position) of ink ejection, preventing misalignment and ensuring synchronization between the ink and the object being ejected. The high-voltage plate 53 provides the necessary high voltage to the charging electrode 51, enabling effective charging of the ink droplets, and dynamically adjusts the voltage based on feedback from the phase detection plate 53, ensuring precise synchronization between the charging process and the ink droplet splitting phase.

[0048] Furthermore, the phase detection plate 52 and the high voltage plate 53 form a deflection electric field space. The ink droplets after passing through the charging electrode 51 just enter the deflection electric field space. Under the action of the electric field force, the charged ink droplets deflect to different displacements according to the magnitude of their own charge, and then fall on the object to be printed to form different texts or patterns.

[0049] In this embodiment, an ink line recovery groove 61 is also fixed on the plane of the printhead semi-circular base 2, and the ink line recovery groove 61 is located behind the ink droplet control component 5.

[0050] Furthermore, such as Figure 1 As shown, the ink line recovery tank 61 is equipped with a bent tube 62, the opening of which corresponds to the nozzle outlet of the nozzle 42. The ink line recovery tank 61 is used to recover uncharged ink droplets or undeflected ink droplets. Specifically, ink droplets ejected from the nozzle outlet of the nozzle 42 can enter the ink line recovery tank 61 through the opening of the bent tube 62 without being deflected.

[0051] Furthermore, the printhead pipe connector 1 is equipped with an ink supply pipe 71 and an evacuation pipe 72. Figure 1 Only one end of the ink supply line 71 and one end of the drain line 72 are shown. One end of the ink supply line 71 is connected to the ink supply solenoid valve 31, and one end of the drain line 72 is connected to the drain solenoid valve 32. In the unshown parts, the other end of the drain line 72 is connected to the ink supply line 71, and the other end of the ink supply line 71 is connected to the ink cartridge.

[0052] Furthermore, the ink supply solenoid valve 31 is provided with an inkjet pipe 73 on its valve head. The ink supply solenoid valve 31 is connected to the nozzle assembly 4 through the inkjet pipe 73. Specifically, the nozzle 42 is provided with an inkjet inlet, and the inkjet pipe 73 is connected to the inkjet inlet on the nozzle 42.

[0053] Furthermore, the valve head of the venting solenoid valve 32 is provided with a venting pipe 74. The venting solenoid valve 32 is connected to the nozzle assembly 4 through the venting pipe 74. Specifically, the nozzle 42 is provided with a venting port, which is higher than the inkjet inlet and inside the nozzle 42. The venting port is connected to the inkjet inlet, and the venting pipe 74 is connected to the venting port on the nozzle 42.

[0054] In one feasible embodiment, the ink line recovery tank 61 is connected to a return pipeline, which is connected to the aforementioned inkjet pipeline 71 and vent pipeline 72, thus forming a printhead pipeline system. This printhead pipeline system is located inside the printhead pipeline connector 1 and the printhead semi-circular base 2. When the ink supply solenoid valve 31 is closed, the vent solenoid valve 32 provides a certain air pressure by opening and closing, which is used to return the ink collected in the ink line recovery tank 61 back to the printhead pipeline system.

[0055] In this embodiment, the printhead pipeline connector 1 is also provided with a positive gas pipe 8, which is connected to the printhead pipeline system. The positive gas pipe 8 is used to provide stable positive pressure gas to assist the ink flow in the printhead pipeline system and maintain the system pressure balance.

[0056] Based on the above embodiments, the beneficial effects of this utility model can be obtained as follows:

[0057] 1. The valve connection module has been eliminated, and a large solenoid valve is directly used as the ink supply solenoid valve and the venting solenoid valve. Both the ink supply solenoid valve and the venting solenoid valve are directly connected to the nozzle assembly, which simplifies the structure and reduces the potential risks caused by sealing problems in redundant connections.

[0058] 2. The large solenoid valve has the characteristic of rapid opening and closing, and can complete the opening and closing of ink supply and air pressure in a short time to meet the needs of inkjet printers.

[0059] 3. The valve head, valve body, valve core, and coil in the solenoid valve can all be separated. The coil and valve body, as well as the valve body and valve head, are fixed and connected by screws and nuts, replacing the traditional welding method. This allows for repeated disassembly and assembly of the electrical connection, and the valve core can be quickly disassembled and cleaned for maintenance, thereby reducing maintenance difficulty and workload and improving maintenance efficiency.

[0060] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An inkjet printer head that is easy to maintain, characterized by, The inkjet printer printhead includes a printhead tubing connector and a printhead semicircular base located behind the printhead tubing connector. A solenoid valve assembly, a nozzle assembly, and an ink droplet control assembly are sequentially fixed on the plane of the printhead semicircular base. The solenoid valve assembly is connected to the printhead pipeline connector and the nozzle assembly respectively, and the ink droplet control assembly is correspondingly provided with the nozzle assembly; The solenoid valve assembly includes at least one solenoid valve, each of the solenoid valves including a separable valve head, valve body, valve core and coil; The valve head is fixed on the plane of the semi-circular base of the nozzle; the valve body has an inverted T-shaped cross-section and a hollow structure; the lower end of the valve body is connected to the valve head by a screw, and the upper end of the valve body is threaded. The valve core is located in the hollow channel of the valve body, the coil is wrapped around the outer wall of the valve body, and the coil is fixed to the valve body by a nut.

2. The easy-to-maintain inkjet printer printhead of claim 1, wherein, The nozzle assembly includes a nozzle adjustment frame and a nozzle; The nozzle adjusting bracket is fixed on the plane of the semi-circular base of the nozzle, and the nozzle is mounted on the nozzle adjusting bracket.

3. The easy-to-maintain inkjet printer printhead of claim 2, wherein, The droplet control assembly includes a charging electrode, a phase detection board, and a high-voltage board; The upper end of the charging electrode is provided with a slot, which corresponds to the outlet of the nozzle; The high-voltage plate and the phase detection plate are arranged side by side, and the space between the high-voltage plate and the phase detection plate corresponds to the slot.

4. The easy-to-maintain inkjet printer printhead as described in claim 2, characterized in that, An ink line recovery groove is also fixed on the plane of the printhead semi-circular base, and the ink line recovery groove is located behind the ink droplet control component; The ink line recovery tank is equipped with a bent tube, the opening of which corresponds to the nozzle outlet.

5. The easy-to-maintain inkjet printer printhead as described in claim 1, characterized in that, The nominal diameter of the solenoid valve is 15 mm.

6. The easy-to-maintain inkjet printer printhead as described in claim 1, characterized in that, The solenoid valve assembly includes an ink supply solenoid valve; The printhead pipe connector has one end of an ink supply pipe, and the ink supply solenoid valve is connected to the ink cartridge through one end of the ink supply pipe.

7. The easy-to-maintain inkjet printer printhead as described in claim 6, characterized in that, The ink supply solenoid valve has an inkjet tube on its valve head, and the ink supply solenoid valve is connected to the nozzle assembly through the inkjet tube.

8. The easy-to-maintain inkjet printer printhead as described in claim 6, characterized in that, The solenoid valve assembly also includes a vent solenoid valve. The printhead pipe connector is also provided with one end of a drain pipe, and the drain solenoid valve is connected to the ink supply pipe through one end of the drain pipe.

9. The easy-to-maintain inkjet printer printhead as described in claim 8, characterized in that, The valve head of the venting solenoid valve is provided with a venting pipe, and the venting solenoid valve is connected to the nozzle assembly through the venting pipe.

10. The easy-to-maintain inkjet printer printhead as described in claim 1, characterized in that, The nozzle pipe connector is also equipped with a positive air pipe.

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