Control valve for inkjet printers

Abstract

The utility model discloses a control valve for inkjet printer, including valve body, support part, electromagnetic assembly and permanent magnet. The valve body has the passageway of ink inlet and ink outlet intercommunication, support part sets up in the valve body one side, and the electromagnetic assembly includes the fixed iron core, movable iron core and first electromagnetic coil of setting up on support part, and the permanent magnet is set in the magnetic conductive pipe outside and is close to the valve body one end, and movable iron core moves when at least part is located in the permanent magnet. The utility model discloses through setting permanent magnet in movable iron core outside, when movable iron core moves to and fixed iron core keep the suction position, can disconnect the current of first electromagnetic coil, utilizes the magnetic lock force of first permanent magnet, makes movable iron core keep in suction position, thereby ensures the passageway maintenance intercommunication state. The design not only saves the energy consumption, also avoided the coil heating problem that electromagnetic valve caused because of long -time power -on, improved the service life of control valve.

Description

Technical Field

[0001] This utility model relates to the field of printing device technology, and in particular to a control valve for an inkjet printer. Background Technology

[0002] Inkjet printers mainly consist of a printing mechanism, a paper feeding mechanism, a cleaning system, and a circuit system. Among these, the ink cartridge is the core component, used to store ink and eject it onto paper through the printhead to complete the printing task. The ink cartridge typically works in conjunction with components such as a control valve and a negative pressure system. During use, the timing and flow rate of ink ejection are adjusted by controlling the opening and closing of the control valve, thereby ensuring printing accuracy.

[0003] In practical applications, the inventors discovered that the control valves in existing inkjet printers have at least the following problems: During inkjet printer operation, the control valve needs to be continuously energized to maintain the connection between the ink inlet and outlet channels. However, prolonged energization of the control valve causes the coil to overheat, which not only shortens its lifespan but may also lead to malfunctions such as burnout. Utility Model Content

[0004] The main objective of this invention is to provide a control valve for inkjet printers, aiming to solve the aforementioned technical problems.

[0005] The technical problem solved by this utility model is achieved by the following technical solution:

[0006] A control valve for an inkjet printer, characterized in that it comprises:

[0007] The valve body is provided with a channel connecting the ink inlet and the ink outlet;

[0008] A support component is disposed on one side of the valve body. The support component includes a bracket and a guide tube, a magnetic tube, and a sleeve disposed on the bracket. The guide tube communicates with the channel, and the magnetic tube and the sleeve are both sleeved on the outside of the guide tube.

[0009] An electromagnetic component includes a fixed iron core, a movable iron core, and a first electromagnetic coil. The fixed iron core is fixed to the bracket and extends into the guide tube. The movable iron core is disposed opposite to the fixed iron core and can reciprocate along the axial direction of the guide tube to control the opening and closing of the channel. The first electromagnetic coil is wrapped around the sleeve.

[0010] A permanent magnet is sleeved on the outside of the magnetic tube and close to one end of the valve body, and the movable iron core is at least partially located inside the permanent magnet when it moves.

[0011] In some embodiments, the fixed iron core is connected to the movable iron core via a return spring.

[0012] In some embodiments, the electromagnetic component further includes:

[0013] A second electromagnetic coil is disposed between the guide tube and the sleeve, and the magnetic flux direction of the second electromagnetic coil is opposite to that of the first electromagnetic coil.

[0014] In some embodiments, the ink outlet includes multiple connectors.

[0015] In some embodiments, the bracket is provided with a magnetic shielding element, which is located between the permanent magnet and the valve body.

[0016] In some embodiments, the support component further includes a high-temperature resistant insulating layer disposed on the bracket.

[0017] In some embodiments, the channel includes:

[0018] The first channel is connected to the ink inlet;

[0019] The second channel is connected to the ink outlet.

[0020] A connecting cavity is provided on the side of the valve body facing the guide tube. The connecting cavity connects the first channel and the second channel. The bottom surface of the connecting cavity is provided with an annular protrusion that protrudes towards the movable iron core.

[0021] In some embodiments, the top surface of the annular protrusion that contacts the seal at the end of the movable iron core is arc-shaped.

[0022] In some embodiments, the sidewall of the movable iron core is provided with a guide portion that is adapted to the inner hole of the guide tube.

[0023] In some embodiments, the support member is provided with a heat dissipation component at one end near the valve body.

[0024] The beneficial effects of this utility model are:

[0025] This invention relates to a control valve for inkjet printers. By placing a permanent magnet on the outside of a movable iron core, when the movable iron core moves to a position where it is attracted to a fixed iron core, the current to the first electromagnetic coil is disconnected. The magnetic locking force of the first permanent magnet keeps the movable iron core in the attracted position, thus ensuring the channel remains connected. This design not only effectively saves energy consumption but also avoids the coil overheating problem caused by prolonged energization of the electromagnetic valve, effectively improving the overall service life of the control valve. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional structural diagram of a control valve for an inkjet printer according to an embodiment of the present invention.

[0028] Figure 2 This is a top view of a control valve for an inkjet printer according to an embodiment of the present invention.

[0029] Figure 3 for Figure 2 Sectional view along the middle AA line;

[0030] Figure 4 This is a cross-sectional view of a control valve for an inkjet printer according to another embodiment of the present invention.

[0031] The above figure labels:

[0032] 10-Valve body; 11-Ink inlet; 12-Ink outlet; 13-Channel; 131-First channel; 132-Second channel; 133-Connecting cavity; 1331-Annular protrusion;

[0033] 20-Supporting component; 21-Bracket; 22-Guide tube; 23-Magnetic tube; 24-Sleeve; 25-Magnetic shielding component; 26-High temperature resistant insulation layer;

[0034] 30-Electromagnetic assembly; 31-Fixed iron core; 32-Modible iron core; 321-Guide part; 322-Seal; 33-First electromagnetic coil; 34-Reset spring; 35-Second electromagnetic coil;

[0035] 40-Permanent magnet. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0037] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing the present invention 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 the present invention. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] The inkjet printer includes... The inventors discovered that during the operation of an inkjet printer, the solenoid valve needs to be continuously energized to maintain the connection between the ink inlet and outlet channels. However, prolonged energization of the solenoid valve causes the coil to overheat, which not only shortens its lifespan but may also lead to burnout and other malfunctions. Therefore, this application provides a control valve for an inkjet printer. By setting a permanent magnet 40 on the outside of the movable iron core 32, when the movable iron core 32 moves to a position where it is attracted to the fixed iron core 31, the current to the first solenoid coil 33 can be disconnected. The magnetic locking force of the first permanent magnet 40 keeps the movable iron core 32 in the attracted position, thereby ensuring that the channel 13 remains connected. This design not only effectively saves energy consumption but also avoids the coil overheating problem caused by prolonged energization of the solenoid valve, effectively improving the overall lifespan of the control valve.

[0042] Please see Figures 1 to 3 As shown, the control valve for an inkjet printer includes a valve body 10, a support component 20, an electromagnetic component 30, and a permanent magnet 40.

[0043] The upper end face of the valve body 10 is provided with an ink inlet 11, which is used to connect with ink supply devices such as ink cartridges. The lower end face opposite to the ink inlet 11 is provided with an ink outlet 12, which may include multiple connectors connected to the printer printhead. The inside of the valve body 10 is provided with a channel 13 that connects the ink inlet 11 and the ink outlet 12.

[0044] A support component 20 is disposed on one side of the valve body 10, mainly serving a supporting function to support the electromagnetic assembly 30 and the electromagnetic component 30. The support component 20 may include a bracket 21 and a guide tube 22, a magnetic tube 23, and a sleeve 24 disposed on the bracket 21. The bracket 21 may be a frame structure, one end of which can be detachably fastened to the valve body 10 by bolts, screws, or other fasteners. One end of the guide tube 22 can be connected to the valve body 10 by bolts, screws, or other fasteners. The inner cavity of the guide tube 22 is connected to the channel 13. The magnetic tube 23 is sleeved on the outside of the guide tube 22, and the sleeve 24 is sleeved on the outside of the magnetic tube 23.

[0045] The electromagnetic assembly 30 includes a fixed iron core 31, a movable iron core 32, and a first electromagnetic coil 33. One end of the fixed iron core 31 is fixedly connected to the end of the bracket 21 away from the valve body 10 by bolts or other fasteners, and the other end extends into the interior of the guide tube 22. The movable iron core 32 is arranged opposite to the fixed iron core 31, and a certain distance is reserved between the end faces of the movable iron core 32 and the fixed iron core 31. When the movable iron core 32 moves back and forth along the axial direction of the guide tube 22, it can control the connection or disconnection of the channel 13. The first electromagnetic coil 33 is arranged around the sleeve 24, and the fixed iron core 31 and the movable iron core 32 are at least partially located within the area covered by the first electromagnetic coil 33. The permanent magnet 40 is an annular body with an internal through hole, which is sleeved on the outside of the magnetic tube 23 near the end of the valve body 10. When the movable iron core 32 moves, it is at least partially located inside the permanent magnet 40.

[0046] Specifically, when the first electromagnetic coil 33 is energized, the movable iron core 32 moves towards the fixed iron core 31 under magnetic force, keeping the channel 13 connected. When the movable iron core 32 moves to a position where it is attracted to the fixed iron core 31, the current to the first electromagnetic coil 33 can be disconnected. The magnetic locking force of the first permanent magnet 40 keeps the movable iron core 32 in the attracted position, thus ensuring that the channel 13 remains connected. When the first electromagnetic coil 33 is energized in the reverse direction, the attraction force of the first permanent magnet 40 is canceled out, the magnetic field direction is reversed, and a magnetic repulsive force is generated between the movable iron core 32 and the fixed iron core 31, causing the movable iron core 32 to detach from the fixed iron core 31 and abut against the side of the valve body 10, blocking the channel 13.

[0047] The channel 13 may include a first channel 131 and a connecting cavity 133. The first channel 131 is located at the upper part of the valve body 10 and is connected to the ink inlet 11; the second channel 132 is located at the lower part of the valve body 10 and is connected to the ink outlet 12; the connecting cavity 133 is located on the side of the valve body 10 facing the guide tube 22, and the connecting cavity 133 connects the first channel 131 and the second channel 132. The end of the movable iron core 32 away from the fixed iron core 31 is provided with a sealing element 322 that cooperates with the connecting cavity 133. The sealing element 322 can move axially back and forth with the movable iron core 32, and can be in close contact with or separate from the connecting cavity 133, thereby realizing the opening and closing of the channel 13.

[0048] Furthermore, the bottom surface of the connecting cavity 133 is provided with an annular protrusion 1331 protruding towards the movable iron core 32. The annular protrusion 1331 is located at the entrance end of the second channel 132. The outer diameter of the annular protrusion 1331 is smaller than the outer diameter of the sealing member 322 at the end of the movable iron core 32, so that the sealing member 322 can completely cover the annular protrusion 1331. By providing the annular protrusion 1331, the sealing effect between the sealing member 322 and the connecting cavity 133 can be improved, preventing ink from seeping into the second channel 132 from the gap between the connecting cavity 133 and the sealing member 322.

[0049] Furthermore, the top surface of the annular protrusion 1331 that contacts the seal 322 at the end of the movable iron core 32 is arc-shaped. By making the top surface of the annular protrusion 1331 arc-shaped, the connection sealing between the connecting cavity 133 and the movable iron core 32 is further improved.

[0050] In some embodiments of this application, the fixed iron core 31 can be connected to the movable iron core 32 via a return spring 34. When the movable iron core 32 moves toward the fixed iron core 31, the return spring 34 is compressed. If the first electromagnetic coil 33 is de-energized at this time, the permanent magnet 40 can provide a holding force for the movable iron core 32, allowing the channel 13 to remain connected. When the first electromagnetic coil 33 is energized in the reverse direction, the attraction force of the first permanent magnet 40 is weakened, the holding force on the movable iron core 32 decreases, the return spring 34 resets and pushes the movable iron core 32 toward the valve body 10 until the sealing member 322 at its end abuts against the annular protrusion 1331 on the bottom surface of the communicating cavity 133, thereby blocking the channel 13.

[0051] Please see Figure 4 In some other embodiments of this application, the electromagnetic component 30 may further include a second electromagnetic coil 35, which is disposed between the guide tube 22 and the sleeve 24, and the magnetic flux direction of the second electromagnetic coil 35 is opposite to that of the first electromagnetic coil 33.

[0052] Specifically, when the first electromagnetic coil 33 is energized, the movable iron core 32 moves toward the fixed iron core 31, connecting the channel 13. After the movable iron core 32 and the fixed iron core 31 are fully attracted, the current to the first electromagnetic coil 33 is disconnected. At this time, the attraction generated by the permanent magnet 40 keeps the movable iron core 32 in that position, thus keeping the channel 13 connected. When it is necessary to disconnect the channel 13, current is supplied to the second electromagnetic coil 35. Since the magnetic field direction of the second electromagnetic coil 35 is opposite to that of the first electromagnetic coil 33, the magnetic field generated by the second electromagnetic coil 35 can cancel the residual magnetic field of the first electromagnetic coil 33. At the same time, a repulsive force is generated in the gap between the movable iron core 32 and the fixed iron core 31, pushing the movable iron core 32 away from the fixed iron core 31, thus disconnecting the channel 13.

[0053] In some embodiments of this application, a magnetic shielding element 25 is provided on the bracket 21, and the magnetic shielding element 25 is located between the permanent magnet 40 and the valve body 10. By providing the magnetic shielding element 25, external electromagnetic interference can be reduced, ensuring the normal operation of the solenoid valve assembly 30.

[0054] In some embodiments of this application, the support component 20 may further include a high-temperature resistant insulating layer 26 disposed on the bracket 21. By providing the high-temperature resistant insulating layer 26 on the bracket, it is possible to ensure that the solenoid valve assembly 30 operates normally in high-temperature environments.

[0055] In some embodiments of this application, the sidewall of the movable iron core 32 is provided with a guide portion 321 that is adapted to the inner hole of the guide tube 22. By providing the guide portion 321, the movable iron core 32 can slide along the inner wall of the guide tube 22, thereby improving the movement accuracy of the movable iron core 32.

[0056] Furthermore, in some embodiments of this application, the support component 20 is provided with a heat dissipation element near the valve body 10, which can be a heat sink. By providing a heat dissipation element, the high temperature generated by the electromagnetic component 30 can be effectively reduced, thereby extending the service life of the entire control valve.

[0057] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0058] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above are only preferred embodiments of this utility model. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this utility model, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A control valve for an inkjet printer, characterized in that, include: The valve body (10) is provided with a channel (13) connecting the ink inlet (11) and the ink outlet (12). A support component (20) is disposed on one side of the valve body (10). The support component (20) includes a bracket (21) and a guide tube (22), a magnetic tube (23) and a sleeve (24) disposed on the bracket (21). The guide tube (22) communicates with the channel (13). The magnetic tube (23) and the sleeve (24) are both sleeved on the outside of the guide tube (22). The electromagnetic assembly (30) includes a fixed iron core (31), a movable iron core (32), and a first electromagnetic coil (33). The fixed iron core (31) is fixed on the bracket (21) and extends into the guide tube (22). The movable iron core (32) is arranged opposite to the fixed iron core (31) and can reciprocate along the axial direction of the guide tube (22) to control the opening and closing of the channel (13). The first electromagnetic coil (33) is wrapped around the sleeve (24). The permanent magnet (40) is sleeved on the outside of the magnetic tube (23) and close to one end of the valve body (10). When the movable iron core (32) moves, it is at least partially located inside the permanent magnet (40).

2. The control valve for an inkjet printer according to claim 1, characterized in that, The fixed iron core (31) is connected to the movable iron core (32) via a return spring (34).

3. The control valve for an inkjet printer according to claim 1, characterized in that, The electromagnetic component (30) also includes: The second electromagnetic coil (35) is disposed between the guide tube (22) and the sleeve (24), and the magnetic flux direction of the second electromagnetic coil (35) is opposite to that of the first electromagnetic coil (33).

4. The control valve for an inkjet printer according to any one of claims 1 to 3, characterized in that, The ink outlet (12) includes multiple connectors.

5. The control valve for an inkjet printer according to any one of claims 1 to 3, characterized in that, The bracket (21) is provided with a magnetic shielding component (25), which is located between the permanent magnet (40) and the valve body (10).

6. The control valve for an inkjet printer according to claim 1, characterized in that, The support component (20) also includes a high-temperature resistant insulating layer (26) disposed on the bracket (21).

7. The control valve for an inkjet printer according to claim 1, characterized in that, The channel (13) includes: The first channel (131) is connected to the ink inlet (11); The second channel (132) is connected to the ink outlet (12); A connecting cavity (133) is provided on the side of the valve body (10) facing the guide tube (22). The connecting cavity (133) connects the first channel (131) and the second channel (132). The bottom surface of the connecting cavity (133) is provided with an annular protrusion (1331) that protrudes toward the movable iron core (32).

8. The control valve for an inkjet printer according to claim 7, characterized in that, The top surface of the annular protrusion (1331) that contacts the seal (322) at the end of the movable iron core (32) is arc-shaped.

9. The control valve for an inkjet printer according to any one of claims 1 to 3, characterized in that, The side wall of the movable iron core (32) is provided with a guide portion (321) that is adapted to the inner hole of the guide tube (22).

10. The control valve for an inkjet printer according to claim 1, characterized in that, The support component (20) has a heat dissipation component at one end near the valve body (10).

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