Miniature diaphragm electromagnetic valve for ink-jet printer

Abstract

The utility model relates to a miniature diaphragm solenoid valve for an ink-jet printer, which comprises a valve body, the valve body is provided with a valve core and a control part, the valve body is provided with a circulation cavity and an ink outlet channel communicated with the circulation cavity, the circulation cavity is also provided with an ink inlet, and the ink inlet is communicated with an ink inlet channel communicated with the outer wall of the valve body. The valve body is fixedly provided with a diaphragm sealing plug in the circulation cavity, the diaphragm sealing plug is divided into a first cavity and a second cavity by the diaphragm sealing plug, the ink inlet is located in the first cavity, and the valve element is located in the second cavity and matched with the diaphragm sealing plug. The valve element can drive the diaphragm sealing plug to seal the ink inlet under the control of the control component, ink flowing through the circulation cavity is completely isolated from the valve element and the like through the action of the diaphragm sealing plug, and therefore it is not needed to worry about the influence of the dried ink on the components such as the valve element and the like. And the structure is more compact, and the nozzle is more suitable for the ink-jet printer.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a micro diaphragm electromagnetic valve for an inkjet printer. Background Art

[0002] Inkjet printers often use solenoid valves to control the injection of ink, and small-character inkjet printers generally use quick-drying basic solvent inks. During the use of existing solenoid valves for inkjet printers, the ink needs to flow through the circulation chamber to contact the valve core, spring and other components. For example, the existing patent number is CN217977649U, which is a micro solenoid valve with a special structure. During use, the ink enters the circulation chamber 11 from the medium inlet 12, and leaves from the medium outlet 14 and flows out from the outflow channel 13 when the valve core 6 is open. When the ink is in the circulation chamber 11, it will directly contact the valve core 6, spring 7 and other components. Therefore, when the inkjet printer is shut down for a long time, the ink in the circulation chamber 11 dries up and the valve core is easily frozen, making it difficult to work again. In addition, since the valve core 6 is closed, the ink in the circulation chamber 11 cannot be discharged. After a large amount of ink accumulates in the circulation chamber 11 and dries up, the solenoid valve needs to be disassembled for ultrasonic cleaning in the lightest case, and the solenoid valve is scrapped in the worst case, which seriously affects the normal use of the inkjet printer and brings great challenges to maintenance. The present application makes improvements to the above-mentioned problems. Utility Model Content

[0003] The utility model provides a micro diaphragm solenoid valve for an inkjet printer, which does not require worrying about the ink affecting components such as a valve core after drying, and has a compact structure and is easy to maintain, thus solving the above-mentioned problems existing in the use process of the prior art.

[0004] The technical solution of the utility model is achieved as follows: a micro diaphragm solenoid valve for an inkjet printer comprises a valve body, valve cores and a control component for controlling the left and right movement of the valve core are provided on the left and right ends of the valve body, a circulation cavity is provided on the outer wall of the valve body, an ink outlet channel leading to the circulation cavity is provided, the circulation cavity is also provided with an ink inlet at its center position, the ink inlet is connected with the ink inlet channel leading out of the outer wall of the valve body, a diaphragm sealing plug is fixedly provided in the circulation cavity of the valve body, the diaphragm sealing plug separates the diaphragm sealing plug into a first cavity and a second cavity, the ink inlet is located in the first cavity, the valve core is located in the second cavity and cooperates with the diaphragm sealing plug, and the valve core can drive the diaphragm sealing plug to form a seal around the ink inlet under the control of the control component.

[0005] Preferably, the diaphragm sealing plug includes an isolation rubber membrane and an isolation butt, the isolation butt protrudes toward the ink inlet, and the valve core includes a connecting top, which is fixedly inserted in the isolation butt.

[0006] Preferably, a pressure seat is provided in the second cavity, and a limiting platform is provided on the inner wall of the flow cavity of the valve body. The edge of the isolation rubber membrane facing the first cavity abuts against the limiting platform. The pressure seat is fixedly arranged between the control component and the diaphragm sealing plug and presses the side of the isolation rubber membrane facing the second cavity. A movable opening is provided on the pressure seat for the isolation abutment to pass through.

[0007] Preferably, an insertion cavity is provided in the isolation butt, the connecting head is inserted in the insertion cavity, an annular groove is provided on the connecting head, and a fixing ring which is clamped in the annular groove is provided in the insertion cavity of the isolation butt.

[0008] Preferably, the control component includes a fixing frame, a coil assembly and a U-shaped iron. The fixing frame is detachably connected to the valve body. The fixing frame includes a connecting pipe. The coil assembly is sleeved on the connecting pipe. The connecting pipe is fixedly connected to a fixed iron core on a side away from the valve body. The valve core is movably arranged on the other side of the connecting pipe. The middle part of the U-shaped iron is abutted against an end of the coil assembly away from the valve body. Both sides of the U-shaped iron are wrapped around the outer wall of the coil assembly. The fixed iron core penetrates the U-shaped iron and is connected to a limiting member.

[0009] Preferably, the control component further comprises a spring sleeved outside the valve core, the valve core is provided with a stop plate, and two ends of the spring respectively abut between the stop plate and the fixing frame.

[0010] Preferably, the limit member includes a retaining ring, and an annular groove is formed on the outer side wall of the fixed iron core at one end away from the valve body, the retaining ring fits in the annular groove, and the retaining ring is supported on the side of the U-shaped iron away from the coil assembly.

[0011] In summary, the beneficial effects of the present invention are:

[0012] 1. In the utility model, the ink flowing through the circulation cavity is completely isolated from the valve core and the like by the action of the diaphragm sealing plug, so there is no need to worry about the ink affecting the valve core and the like after drying up. When working, the valve core drives the diaphragm sealing plug to move through the action of the control component. When the valve core drives the diaphragm sealing plug to seal the ink inlet, the ink cannot flow into the circulation cavity, so a large amount of ink will not accumulate in the circulation cavity.

[0013] 2. The coil assembly is made of a coil that is sealed as a whole by pouring nylon, which is insulated, sealed and moisture-proof. In addition, when disassembling the present invention, first remove the retaining ring, then remove the U-shaped iron and the coil assembly, and then remove the fixing frame to directly clean the interior of the present invention, which has high maintainability.

[0014] 3. The utility model uses only one valve body, and separate coil assemblies are used at both ends of the valve body to drive the valve core to work, thereby achieving the effect of two solenoid valves, with a compact structure, and is more suitable for inkjet printer nozzles. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the explosion of the structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 4 for Figure 3 A partial enlarged schematic diagram of one side;

[0020] Figure 5 This is a schematic diagram of the structure of the utility model in which only one side has an isolation rubber membrane and a pressure seat.

[0021] In the figure: 1. valve body; 11. circulation cavity; 111. first cavity; 112. second cavity; 12. ink outlet channel; 13. ink inlet; 14. ink inlet channel; 15. limit table; 2. valve core; 21. connecting head; 211. annular groove; 22. butt plate; 3. diaphragm sealing plug; 31. isolation rubber membrane; 32. isolation butt; 321. fixing ring; 322. inserted cavity; 4. pressure seat; 41. movable; 51. fixing frame; 52. connecting pipe; 53. coil assembly; 54. U-shaped iron; 55. fixed iron core; 551. annular groove; 56. retaining ring; 6. spring. DETAILED DESCRIPTION

[0022] The following will be combined with the attached embodiment of the present utility model Figure 1-5 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example:

[0024] like Figures 1 to 4 As shown, the utility model discloses a micro diaphragm solenoid valve for inkjet printer, including a valve body 1, a valve core 2 and a control component for controlling the valve core 2 to move left and right are arranged on the left and right sides of the valve body 1, in addition, a circulation cavity 11 is opened on the left and right ends of the valve body 1, an ink outlet channel 12 leading to the circulation cavity 11 is opened on the outer wall of the valve body 1, and the circulation cavity 11 is also opened at its central position. The ink inlet 13 is connected to the ink inlet channel 14 leading to the outer wall of the valve body 1, wherein the valve body 1 is fixedly provided with a diaphragm sealing plug 3 in the circulation cavity 11, and the diaphragm sealing plug 3 separates the diaphragm sealing plug 3 into a first cavity 111 and a second cavity 112, the ink inlet 13 is located in the first cavity 111, and the ink outlet channel 12 is also only connected to the first cavity 11 1 is connected, the valve core 2 is located in the second cavity 112 and cooperates with the diaphragm sealing plug 3. The valve core 2 can drive the diaphragm sealing plug 3 to form a seal on the ink inlet 13 under the control of the control component. The utility model can avoid direct contact between ink and components such as the valve core 2 through the provision of the diaphragm sealing plug 3, thereby avoiding the difficulty of the valve core 2 to work due to ink drying. When working, the valve core 2 drives the diaphragm sealing plug 3 to move through the action of the control component, and can open or close the ink inlet 13. When the valve core 2 drives the diaphragm sealing plug 3 to seal the ink inlet 13, ink cannot flow into the circulation cavity 11, and the ink in the circulation cavity 11 will quickly flow out from the ink outlet channel 12, so a large amount of ink will not accumulate in the circulation cavity 11.

[0025] Specifically, the diaphragm sealing plug 3 of the utility model includes an isolation rubber membrane 31 and an isolation butt 32, both of which can be deformed, wherein the isolation butt 32 protrudes toward the ink inlet 13, and the valve core 2 includes a connecting head 21, which is fixedly inserted in the isolation butt 32. Furthermore, the specific structure of the connecting head 21 fixedly inserted in the isolation butt 32 is as follows: an insertion cavity 322 is provided in the isolation butt 32, the connecting head 21 is inserted in the insertion cavity 322, and an annular groove 211 is provided on the connecting head 21, and the isolation butt 32 is provided with a fixing ring 321 clamped in the annular groove 211 in the insertion cavity 322. Through this structure, the connecting head 21 can be reliably fixedly inserted in the isolation butt 32, and it is easy to disassemble during maintenance and cleaning.

[0026] The specific structure of the diaphragm sealing plug 3 arranged in the circulation cavity 11 is as follows: a pressure seat 4 is arranged in the second cavity 112, a limiting platform 15 is provided on the inner wall of the circulation cavity 11 of the valve body 1, and the edge of one side of the isolation rubber membrane 31 facing the first cavity 111 abuts against the limiting platform 15, wherein the pressure seat 4 is fixedly arranged between the control component and the diaphragm sealing plug 3 and presses the side of the isolation rubber membrane 31 facing the second cavity 112. In addition, in order to facilitate the left and right movement of the valve core 2, a movable opening 41 for the isolation abutment 32 to pass through is provided on the pressure seat 4.

[0027] The control component of the utility model specifically includes a fixing frame 51, a coil assembly 53 and a U-shaped iron 54. The fixing frame 51 is detachably connected to the valve body 1 through a screw. The fixing frame 51 includes a connecting pipe 52, wherein the coil assembly 53 is movably sleeved on the connecting pipe 52. The coil assembly 53 is made of a coil sealed as a whole by nylon pouring, which can play the role of insulation, sealing and moisture-proof. The connecting pipe 52 is fixedly connected with a fixed iron core 55 on the side away from the valve body 1, and the valve core 2 is movably arranged on the other side of the connecting pipe 52. The middle part of the U-shaped iron 54 is against the end of the coil assembly 53 away from the valve body 1, and the two sides of the U-shaped iron 54 are wrapped in the coil assembly. On the outer wall of 53, the U-shaped iron 544 surrounds the coil assembly 533 to form a closed magnetic circuit, the fixed iron core 55 penetrates the U-shaped iron 54 and is connected to the limiting member, the limiting member is used to fix the coil assembly 53 and the U-shaped iron 54 to prevent them from falling off from the fixing frame 51, and the specific limiting member includes a retaining ring 56. The fixed iron core 55 is provided with an annular groove 551 on the outer wall of the end away from the valve body 1, and the retaining ring 56 is fitted in the annular groove 551. The retaining ring 56 is supported on the side of the U-shaped iron 54 away from the coil assembly 53, thereby limiting the position of the U-shaped iron 54 and fixing the position of the coil assembly 53 to prevent it from falling off from the connecting pipe 52.

[0028] In addition, the control component also includes a spring 6 sleeved on the valve core 2 . A stop plate 22 is provided on the valve core 2 . Two ends of the spring 6 are respectively abutted between the stop plate 22 and the fixing frame 51 .

[0029] In the present invention, when the coil assembly 53 is not energized, the spring 6 pushes the valve core 2 to move toward the ink inlet 13, and the valve core 2 drives the isolating butt 32 on the diaphragm sealing plug 3 to block the ink inlet 13. At this time, the ink in the ink inlet channel 14 cannot enter. When the coil assembly 53 is energized, the valve core 2 moves toward the fixed iron core 55, driving the isolating butt 32 on the diaphragm sealing plug 3 to leave the ink inlet 13. Therefore, the ink in the ink inlet channel 14 enters the first cavity 111 of the circulation cavity 11 through the ink inlet 13 and leaves the ink outlet channel 12.

[0030] Finally, it should be noted that the utility model can be Figure 3As shown, both sides have the same structure, both with diaphragm sealing plug 3 and pressure seat 4, which can also be Figure 5 One side shown is a structure with a diaphragm sealing plug 3 and a pressure seat 4, and the other side is designed to be the same structure as the prior art. The specific design can be selected according to the ink flowing through. In addition, if only one solenoid valve is needed during use, only one side of the flow chamber 11, valve core 2, control components and other structures can be retained.

[0031] It should also be pointed out that the terms used in the present invention, such as "front", "rear", "vertical", "horizontal", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A micro diaphragm solenoid valve for an inkjet printer, comprising a valve body, a valve core and a control component for controlling the valve core to move left and right are provided on both sides of the valve body, characterized in that: A circulation cavity is provided on both left and right ends of the valve body, an ink outlet channel leading into the circulation cavity is provided on the outer wall of the valve body, an ink inlet is provided at the center of the circulation cavity, the ink inlet is connected with the ink inlet channel leading out of the outer wall of the valve body, a diaphragm sealing plug is fixedly provided in the circulation cavity of the valve body, the diaphragm sealing plug separates the diaphragm sealing plug into a first cavity and a second cavity, the ink inlet is located in the first cavity, the valve core is located in the second cavity and cooperates with the diaphragm sealing plug, and the valve core can drive the diaphragm sealing plug to seal the ink inlet under the control of the control component.

2. The micro diaphragm solenoid valve for inkjet printer according to claim 1, characterized in that: The diaphragm sealing plug includes an isolation rubber membrane and an isolation butt, the isolation butt protrudes toward the ink inlet, and the valve core includes a connecting top, which is fixedly inserted in the isolation butt.

3. The micro diaphragm solenoid valve for inkjet printer according to claim 2, characterized in that: A pressure seat is provided in the second cavity, and a limiting platform is provided on the inner side wall of the flow cavity of the valve body. The edge of the isolation rubber membrane facing the first cavity abuts against the limiting platform. The pressure seat is fixedly arranged between the control component and the diaphragm sealing plug and presses the side of the isolation rubber membrane facing the second cavity. A movable opening is provided on the pressure seat for the isolation abutment to pass through.

4. The micro diaphragm solenoid valve for inkjet printer according to claim 2, characterized in that: An inserting cavity is provided in the isolating butt head, the connecting head is inserted in the inserting cavity, an annular groove is provided on the connecting head, and a fixing ring which is clamped in the annular groove is provided in the inserting cavity of the isolating butt head.

5. The micro diaphragm solenoid valve for inkjet printer according to claim 1, characterized in that: The control component includes a fixing frame, a coil assembly and a U-shaped iron. The fixing frame is detachably connected to the valve body. The fixing frame includes a connecting pipe. The coil assembly is sleeved on the connecting pipe. The coil assembly is made of a coil that is sealed as a whole by nylon casting. The connecting pipe is fixedly connected to a fixed iron core on the side away from the valve body. The valve core is movably arranged on the other side of the connecting pipe. The middle part of the U-shaped iron is abutted against the end of the coil assembly away from the valve body. Both sides of the U-shaped iron are wrapped on the outer wall of the coil assembly. The fixed iron core penetrates the U-shaped iron and is connected to a limiting piece.

6. The micro diaphragm solenoid valve for inkjet printer according to claim 5, characterized in that: The control component also includes a spring sleeved outside the valve core, the valve core is provided with a stop plate, and two ends of the spring are respectively abutted between the stop plate and the fixing frame.

7. The micro diaphragm solenoid valve for inkjet printer according to claim 5, characterized in that: The limiter comprises a retaining ring, and an annular groove is formed on the outer side wall of the fixed iron core at one end away from the valve body. The retaining ring is fitted in the annular groove and abuts against the side of the U-shaped iron away from the coil assembly.

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