Coating device with multi-point coating liquid level height control function

Abstract

The invention discloses a coating device with a multi-point coating liquid level height control function, and relates to the technical field of coating and encapsulating equipment, the coating device comprises a mounting table and a connecting line, and a thermistor, a coating mechanism, an adjusting mechanism and a moving mechanism are mounted at the bottom end of the connecting line. According to the invention, the coating mechanism is arranged, and after the heights of the orifices of the coating pipes are adjusted to be consistent through processing and assembly precision, the heights and shapes of the slightly convex surfaces naturally formed after the liquid level overflows each time are consistent, so that coating surfaces with consistent heights can be provided for multiple points; as the coating surface is naturally formed when the liquid level overflows every time, the coating surface with very high repeated precision can be provided; due to the fact that the viscous coating liquid is large in surface tension, the section of the coating pipe is small, the slightly-convex coating surface can be naturally repaired when the viscous coating liquid is extruded from the interior, influences such as air involved in external force of a scraper blade and the like are avoided, bad coating such as bubbles and pits can be reduced to the maximum extent, and coating of the thermistor is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of coating encapsulation equipment, in particular to a coating device with a multi-point coating liquid level control function. Background Art

[0002] A thermistor is a resistor whose resistance is extremely sensitive to temperature. It is also called a semiconductor thermistor. It can be made of single crystal, polycrystalline, glass, plastic and other semiconductor materials. This resistor has a series of special electrical properties. The most basic characteristic is that its resistance changes significantly with temperature and its volt-ampere curve is nonlinear. Within the operating temperature range, the resistance value increases with rising temperature in the positive temperature coefficient (PTC) thermistor; the resistance value decreases with rising temperature in the negative temperature coefficient (NTC) thermistor.

[0003] When thermistors are produced, they need to be coated with epoxy resin. The existing coating method uses a larger open container according to the distribution area of ​​the coating points. The liquid level drops each time the coating is applied, and manual or automatic adjustment is required. The manual adjustment accuracy is not high, resulting in unstable coating dimensions. The automatic adjustment mechanism is complex and difficult to adjust accurately. Before each coating, a scraper is required to eliminate the pits caused by the previous coating and level the liquid surface to improve coating accuracy. A large amount of air will be drawn in, causing bubbles, pits and other poor coating. After a certain number of coatings, the liquid level needs to be adjusted at any time due to the drop in the liquid level. It is difficult to accurately control the liquid level either manually or automatically, resulting in unstable coating dimensions. Some multi-component coating liquids with added curing agents have a limited use period. Using a large open container results in a large amount of coating material waste. In order to facilitate the coating of thermistors, a coating device with a multi-point coating liquid level control function is provided. Summary of the Invention

[0004] The object of the present invention is to provide a coating device with a multi-point coating liquid level control function in order to facilitate coating of a thermistor.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a coating device with a multi-point coating liquid level control function, comprising a mounting platform and a connecting line, a thermistor installed at the bottom end of the connecting line, and coating performed by a coating mechanism, wherein the coating mechanism comprises an overflow trough, the overflow trough being fixedly connected to the top of the mounting platform, the bottom end of the mounting platform being located below the overflow trough and fixedly connected to a connecting box, one side of the connecting box being fixedly connected to a liquid inlet pipe, a liquid pump being installed on the outer wall of the liquid inlet pipe, one end of the liquid inlet pipe being fixedly connected to a vacuum degassing mixer, the top of the connecting box being fixedly connected to a coating pipe, the coating pipe extending to the inner cavity of the overflow trough, the coating pipe being switched by an adjusting mechanism, and the thermistor being displaced by a moving mechanism.

[0006] As a further solution of the present invention: the adjusting mechanism includes a movable plate, the movable plate is arranged below the connecting box, one side of the connecting box is fixedly connected to the limiting rod, and the other side of the connecting box is installed with a first motor, the output end of the first motor is connected to the first threaded rod, the first threaded rod and the limiting rod both pass through the movable plate, the interior of the connecting box is slidably connected to the blocking column, and the blocking column contacts with the top of the movable plate, the interior of the movable plate is located on one side of the blocking column and is rotatably connected to the rotating frame, the top of the rotating frame is fixedly connected to the cross plate, the bottom outer wall of the blocking column is provided with a cross groove, the interior of the blocking column is symmetrically slidably connected to a card block, the card block extends out of the blocking column, and a first spring is connected between the two blocking blocks, and the interior of the blocking column is located at the bottom end of the card block and is slidably connected to an extrusion frame, and the extrusion frame extends to the inner cavity of the cross groove.

[0007] The top of the movable frame is provided with a movable frame, and the movable frame is provided with a movable frame.

[0008] As a further solution of the present invention: a first threaded hole and a limiting hole are respectively opened on both sides of the movable plate, the first threaded hole matches the first threaded rod, and the inner wall of the limiting hole fits the outer wall of the limiting rod.

[0009] As a further solution of the present invention: the inner wall of the shielding column is in contact with the inner wall of the coating tube, and the end of the blocking block extending out of the shielding column is provided with a first inclined surface.

[0010] As a further solution of the present invention: a second inclined surface is provided at the bottom end of the clamping block, and the top end of the extrusion frame contacts the second inclined surface.

[0011] As a further solution of the present invention: the outer wall of the horizontal plate is in contact with the inner wall of the horizontal groove, and the extrusion frame is provided with a semicircular surface at one end located in the inner cavity of the horizontal groove.

[0012] As a further solution of the present invention: a displacement groove for sliding of the displacement plate is provided at the top of the mounting frame, a second threaded hole is provided on the outer wall of the displacement plate, and the second threaded hole matches the second threaded rod.

[0013] As a further solution of the present invention: a third inclined surface is provided on one end of the lower pressing plate facing the fixed block.

[0014] As a further solution of the present invention: the outer wall of the slide rod is in contact with the inner wall of the slide groove, and the slide groove is inclined.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up a coating mechanism and adjusting the height of each coating tube mouth to be consistent through processing and assembly precision, the height and shape of the micro-convex surface naturally formed after each liquid overflow are consistent, which can provide a highly consistent coating surface for multiple points; since the coating surface is naturally formed each time the liquid overflows, a coating surface with very high repeatability can be provided; since the surface tension of the viscous coating liquid is large, the cross-section of the coating tube is small, and extrusion from the inside can naturally repair the micro-convex coating surface, and there is no influence of air being drawn in by external forces such as scrapers, it can minimize bubbles, depressions and other coating defects, making it easier to coat the thermistor; 2. By setting an adjustment mechanism, the operation of the first motor drives the movable plate to move, and the upward displacement of the movable plate drives the shielding column to move, and the shielding column is displaced and inserted into the coating tube. When the top of the shielding column passes through the shielding column, the shielding column on the unused coating tube, the blocking block is displaced out of the shielding column by the elastic force of the first spring, and the shielding column is engaged in the coating tube to close the coating tube. Thereafter, the movable plate is displaced downward to reset, and the displacement of the movable plate drives other shielding columns to move downward to reset, so as to facilitate the switching operation of the coating tube, thereby avoiding the waste of coating liquid discharged from the unused coating tube, and at the same time, the coating tube can be blocked by the movement of the shielding column. 3. By setting up a moving mechanism, when the thermistor is being painted, the positioning rod moves toward the top of the overflow tank. At this time, the lower pressure plate is separated from the fixed block, and the lower pressure plate is reset by the elastic force of the second spring. At this time, the clamping block moves into the circular hole to automatically clamp and fix the connecting wire. When the connecting wire moves to the top of the coating tube, the electric push rod is started to drive the connecting wire and the thermistor to move downward for the coating operation, which is convenient for the displacement operation of the thermistor and can automatically clamp and fix the connecting wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 Schematic diagram of the installation of the thermistor of the present invention; Figure 3 is a cross-sectional view of the overflow trough of the present invention; Figure 4 is a cross-sectional view of the movable panel of the present invention; Figure 5 is a cross-sectional view of the shielding column of the present invention; Figure 6 It is a structural schematic diagram of the mounting frame of the present invention; Figure 7 is a partial cross-sectional view of the mounting bracket of the present invention; Figure 8 It is a structural schematic diagram of the positioning rod of the present invention; Figure 9 is a cross-sectional view of a positioning rod of the present invention; Figure 10 It is a structural schematic diagram of the clamping block of the present invention.

[0017] In the figure: 1. Connecting wire; 2. Thermistor; 3. Mounting platform; 4. Coating mechanism; 401. Overflow tank; 402. Coating pipe; 403. Connecting box; 404. Liquid inlet pipe; 405. Liquid pump; 406. Vacuum degassing mixer; 5. Adjusting mechanism; 501. Movable plate; 502. First motor; 503. First threaded rod; 504. Limiting rod; 505. Blocking column; 506. Rotating frame; 507. Horizontal plate; 508. Horizontal groove; 509 , clamping block; 510, first spring; 511, extrusion frame; 6, moving mechanism; 601, mounting frame; 602, displacement plate; 603, second motor; 604, second threaded rod; 605, electric push rod; 606, displacement frame; 607, positioning rod; 608, round hole; 609, lower pressure plate; 610, second spring; 611, movable rod; 612, clamping block; 613, sliding rod; 614, slide groove; 615, fixed block; 616, support plate. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or connected in one piece; they can be mechanically connected or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internal connections between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following describes an embodiment of the present invention based on its overall structure.

[0020] See also Figures 1 to 10In an embodiment of the present invention, a coating device with a multi-point coating liquid level control function includes a mounting platform 3 and a connecting line 1. A thermistor 2 is installed at the bottom end of the connecting line 1. The thermistor 2 is coated by a coating mechanism 4. The coating mechanism 4 includes an overflow trough 401. The overflow trough 401 is fixedly connected to the top of the mounting platform 3. The bottom end of the mounting platform 3 is located below the overflow trough 401 and is fixedly connected to a connecting box 403. A liquid inlet pipe 404 is fixedly connected to one side of the connecting box 403. A liquid pump 405 is installed on the outer wall of the liquid inlet pipe 404. One end of the liquid inlet pipe 404 is fixedly connected to a vacuum degassing mixer 406. A coating pipe 402 is fixedly connected to the top of the connecting box 403. The coating pipe 402 extends to the inner cavity of the overflow trough 401. The coating pipe 402 is switched by an adjusting mechanism 5, and the thermistor 2 is displaced by a moving mechanism 6.

[0021] In this embodiment: the vacuum degassing mixer 406 stirs and degases the ingredients to form a coating liquid, the liquid pump 405 is started, and the coating liquid is injected into the connection box 403 through the liquid inlet pipe 404. The coating liquid passes through the connection box 403 and is squeezed into each coating tube 402, and appropriately overflows into the overflow tank 401 to eliminate errors; when the coating tube 402 is in a full cup overflowing state, the mobile connecting line 1 drives the thermistor 2 to move, and the thermistor 2 moves into the coating tube 402 and then moves out, thereby completing the coating operation; After the height of the tube mouths of each coating tube 402 is adjusted to be consistent through processing and assembly precision, the height and shape of the micro-convex surface naturally formed after each liquid overflow are consistent, so a highly consistent coating surface can be provided to multiple points; since the coating surface is naturally formed each time the liquid overflows, a coating surface with very high repeatability precision can be provided; since the surface tension of the viscous coating liquid is large, the cross-section of the coating tube 402 is small, and extrusion from the inside can naturally repair the micro-convex coating surface, and there is no influence of external forces such as scrapers to draw in air, etc., which can minimize bubbles, dents and other coating defects, making it easier to coat the thermistor 2.

[0022] Please refer to Figures 3 to 5The adjustment mechanism 5 includes a movable plate 501, which is arranged below the connection box 403. One side of the connection box 403 is fixedly connected to a limit rod 504. A first motor 502 is installed on the other side of the connection box 403. The output end of the first motor 502 is connected to a first threaded rod 503. The first threaded rod 503 and the limit rod 504 both pass through the movable plate 501. A shielding column 505 is slidably connected to the interior of the connection box 403. The shielding column 505 contacts the top of the movable plate 501. The movable plate 50 1 is rotatably connected to a rotating frame 506 on one side of the shielding column 505, and a horizontal plate 507 is fixedly connected to the top of the rotating frame 506. A horizontal groove 508 is provided on the bottom outer wall of the shielding column 505. A clamping block 509 is symmetrically slidably connected to the inside of the shielding column 505. The clamping block 509 extends out of the shielding column 505. A first spring 510 is connected between the two clamping blocks 509. The inside of the shielding column 505 is slidably connected to the bottom end of the clamping block 509. The extrusion frame 511 extends to the inner cavity of the horizontal groove 508.

[0023] In this embodiment, when the coating tube 402 is switched on and off, the rotating frame 506 is rotated, and the rotating frame 506 drives the horizontal plate 507 to rotate, so that the horizontal plate 507 is rotated out from the shielding column 505 below the unused coating tube 402. At this time, the block 509 is displaced out of the shielding column 505 by the elastic force of the first spring 510; on the shielding column 505 below the used coating tube 402, the horizontal plate 507 rotates into the horizontal groove 508, and the horizontal plate 507 contacts the extrusion frame 511, pushing the extrusion frame 511 to move, and the displacement of the extrusion frame 511 pushes the block 509 to move, so that the block 509 moves into the shielding column 505, causing the first spring 510 to be squeezed. When the top of the shielding column 505 passes through the shielding column 505, the shielding column 505 on the unused coating tube 402 is displaced and the block 509 is displaced out of the shielding column 505 by the elastic force of the first spring 510, and the shielding column 505 is engaged in the coating tube 402 to close the coating tube 402. Then the movable plate 501 is displaced downward for reset, and the displacement of the movable plate 501 drives other shielding columns 505 to displace and reset downward, which is convenient for the opening and closing operation of the coating tube 402, avoiding the coating liquid from being discharged from the unused coating tube 402 and causing waste. At the same time, the coating tube 402 can be blocked by the movement of the shielding column 505.

[0024] Please refer to Figures 6 to 10The moving mechanism 6 includes a mounting frame 601, which is fixedly connected to the top of the mounting platform 3. The top of the mounting frame 601 is slidably connected to a displacement plate 602. A second motor 603 is installed on the outer wall of the mounting frame 601. The output end of the second motor 603 is connected to a second threaded rod 604. The second threaded rod 604 passes through the displacement plate 602. An electric push rod 605 is installed on the top of the displacement plate 602. The output end of the electric push rod 605 is connected to a displacement frame 606. A positioning rod 607 is fixedly connected to one side of the bottom of the displacement frame 606. A circular hole 608 is opened on the outer wall of the positioning rod 607. The interior of the displacement frame 606 is slidably connected to an extension rod. The lower pressure plate 609 extends out of the displacement frame 606, and a second spring 610 is connected between the lower pressure plate 609 and the displacement frame 606. The outer wall of the lower pressure plate 609 is fixedly connected to a movable rod 611, and the movable rod 611 is slidably connected to the inside of the positioning rod 607. The inside of the positioning rod 607 is symmetrically slidably connected to the clamping blocks 612 on both sides of the circular hole 608. The outer wall of the clamping block 612 is provided with a sliding groove 614. The outer wall of the movable rod 611 is fixedly connected to a sliding rod 613, and the sliding rod 613 is slidably connected to the inner wall of the sliding groove 614. The outer wall of the mounting frame 601 is fixedly connected to a support plate 616, and the outer wall of one side of the mounting frame 601 is fixedly connected to a fixed block 615.

[0025] The second motor 603 is started, and the second motor 603 drives the second threaded rod 604 to rotate. The second threaded rod 604 rotates and drives the displacement plate 602 to move. The displacement of the displacement plate 602 drives the positioning rod 607 to move through the electric push rod 605 and the displacement frame 606, so that the positioning rod 607 moves to the top of the supporting plate 616. At this time, the lower pressing plate 609 contacts the fixed block 615, and the lower pressing plate 609 is forced to move downward, causing the second spring 610 to be squeezed. The displacement of the lower pressing plate 609 drives the movable rod 611 to move, and the displacement of the movable rod 611 drives the sliding rod 613 to move synchronously. The sliding rod 613 slides in the sliding groove 614 and drives the clamping block 612 to move. The clamping block 612 moves out of the circular hole 608. At this time, the connecting wire 1 can be moved into the circular hole 608, and the thermistor 2 contacts the top of the supporting plate 616, so that the bottom of the thermistor 2 can be kept flush. When the thermistor 2 is being painted, the positioning rod 607 moves toward the top of the overflow tank 401. At this time, the lower pressure plate 609 is separated from the fixed block 615, and the lower pressure plate 609 is reset by the elastic force of the second spring 610. At this time, the clamping block 612 moves into the circular hole 608 to automatically clamp and fix the connecting wire 1. When the connecting wire 1 moves to the top of the coating tube 402, the electric push rod 605 is started to drive the connecting wire 1 and the thermistor 2 to move downward for the coating operation, which is convenient for the displacement operation of the thermistor 2 and can automatically clamp and fix the connecting wire 1.

[0026] Please refer to Figures 3 to 5 A first threaded hole and a limiting hole are respectively opened on both sides of the movable plate 501. The first threaded hole matches the first threaded rod 503, and the inner wall of the limiting hole fits with the outer wall of the limiting rod 504.

[0027] In this embodiment, the first motor 502 drives the first threaded rod 503 to rotate, and the rotation of the first threaded rod 503 drives the movable plate 501 to move. At this time, the limiting rod 504 slides in the limiting hole to limit the displacement of the movable plate 501.

[0028] Please refer to Figures 3 to 5 The inner wall of the shielding column 505 is in contact with the inner wall of the coating tube 402 , and one end of the block 509 extending out of the shielding column 505 is provided with a first inclined surface.

[0029] In this embodiment: the movable plate 501 moves upward to drive the shielding column 505 to move, and the shielding column 505 is moved and inserted into the coating tube 402. When the top of the shielding column 505 passes through the shielding column 505, the shielding column 505 on the unused coating tube 402, the blocking block 509 is displaced out of the shielding column 505 by the elastic force of the first spring 510, and the shielding column 505 is engaged in the coating tube 402 to close the coating tube 402.

[0030] Please refer to Figures 3 to 5 The bottom end of the block 509 is provided with a second inclined surface, the top of the extrusion frame 511 is in contact with the second inclined surface, the outer wall of the horizontal plate 507 is in contact with the inner wall of the horizontal groove 508, and the extrusion frame 511 is provided with a semicircular surface at one end of the inner cavity of the horizontal groove 508.

[0031] In this embodiment: the horizontal plate 507 rotates into the horizontal groove 508, the horizontal plate 507 contacts the extrusion frame 511, pushing the extrusion frame 511 to move, and the displacement of the extrusion frame 511 pushes the block 509 to move, so that the block 509 moves into the blocking column 505, causing compression on the first spring 510.

[0032] Please refer to Figures 6 to 10 The top of the mounting frame 601 is provided with a displacement groove for the displacement plate 602 to slide, and the outer wall of the displacement plate 602 is provided with a second threaded hole, which matches the second threaded rod 604.

[0033] In this embodiment, the second motor 603 rotates to drive the second threaded rod 604 to rotate, and the rotation of the second threaded rod 604 drives the displacement plate 602 to displace.

[0034] Please refer to Figures 6 to 10 A third inclined surface is provided on one end of the lower pressing plate 609 facing the fixing block 615 .

[0035] In this embodiment: the positioning rod 607 is displaced to the top of the supporting plate 616, at which time the lower pressure plate 609 contacts the fixed block 615, and the lower pressure plate 609 is forced to displace downward, causing compression on the second spring 610, and the displacement of the lower pressure plate 609 drives the movable rod 611 to displace.

[0036] Please refer to Figures 6 to 10 The outer wall of the slide rod 613 fits with the inner wall of the slide groove 614, and the slide groove 614 is inclined.

[0037] In this embodiment, the displacement of the lower pressing plate 609 drives the movable rod 611 to move, the displacement of the movable rod 611 drives the sliding rod 613 to move synchronously, and the sliding rod 613 slides in the sliding groove 614 to drive the clamping block 612 to move.

[0038] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A coating device with a multi-point coating liquid level control function, comprising a mounting platform (3) and a connecting line (1), wherein a thermistor (2) is mounted at the bottom end of the connecting line (1), characterized in that: The thermistor (2) is coated by a coating mechanism (4), wherein the coating mechanism (4) comprises an overflow trough (401), the overflow trough (401) is fixedly connected to the top of the mounting platform (3), the bottom end of the mounting platform (3) is located below the overflow trough (401) and is fixedly connected to a connection box (403), one side of the connection box (403) is fixedly connected to a liquid inlet pipe (404), an outer wall of the liquid inlet pipe (404) is installed with a liquid pump (405), one end of the liquid inlet pipe (404) is fixedly connected to a vacuum degassing mixer (406), the top end of the connection box (403) is fixedly connected to a coating pipe (402), the coating pipe (402) extends to the inner cavity of the overflow trough (401), the coating pipe (402) is switched on and off by an adjustment mechanism (5), and the thermistor (2) is displaced by a moving mechanism (6).

2. A coating device with a multi-point coating liquid level control function according to claim 1, characterized in that: The regulating mechanism (5) includes a movable plate (501), the movable plate (501) is arranged below the connecting box (403), one side of the connecting box (403) is fixedly connected to a limiting rod (504), the other side of the connecting box (403) is installed with a first motor (502), the output end of the first motor (502) is connected to a first threaded rod (503), the first threaded rod (503) and the limiting rod (504) both pass through the movable plate (501), the interior of the connecting box (403) is slidably connected to a shielding column (505), the shielding column (505) is in contact with the top of the movable plate (501), and the movable plate (50 1) is rotatably connected to a rotating frame (506) located on one side of the shielding column (505), the top of the rotating frame (506) is fixedly connected to a horizontal plate (507), a horizontal groove (508) is provided on the bottom outer wall of the shielding column (505), a clamping block (509) is symmetrically slidably connected to the inside of the shielding column (505), the clamping block (509) extends out of the shielding column (505), a first spring (510) is connected between the two clamping blocks (509), an extrusion frame (511) is slidably connected to the bottom end of the clamping block (509) inside the shielding column (505), and the extrusion frame (511) extends to the inner cavity of the horizontal groove (508).

3. A coating device with a multi-point coating liquid level control function according to claim 2, characterized in that: The moving mechanism (6) comprises a mounting frame (601), the mounting frame (601) is fixedly connected to the top of the mounting platform (3), the top of the mounting frame (601) is slidably connected to a displacement plate (602), a second motor (603) is mounted on the outer wall of the mounting frame (601), the output end of the second motor (603) is connected to a second threaded rod (604), the second threaded rod (604) passes through the displacement plate (602), an electric push rod (605) is mounted on the top of the displacement plate (602), the output end of the electric push rod (605) is connected to the displacement frame (606), a positioning rod (607) is fixedly connected to one side of the bottom of the displacement frame (606), a circular hole (608) is opened on the outer wall of the positioning rod (607), and a hole (608) is extended from the inner wall of the displacement frame (606). The displacement frame (606) has a lower pressure plate (609), a second spring (610) is connected between the lower pressure plate (609) and the displacement frame (606), the outer wall of the lower pressure plate (609) is fixedly connected to a movable rod (611), the movable rod (611) is slidably connected to the interior of the positioning rod (607), the interior of the positioning rod (607) is symmetrically slidably connected to clamping blocks (612) on both sides of the circular hole (608), the outer wall of the clamping block (612) is provided with a sliding groove (614), the outer wall of the movable rod (611) is fixedly connected to a sliding rod (613), the sliding rod (613) is slidably connected to the inner wall of the sliding groove (614), the outer wall of the mounting frame (601) is fixedly connected to a supporting plate (616), and the outer wall of one side of the mounting frame (601) is fixedly connected to a fixed block (615).

4. A coating device with a multi-point coating liquid level control function according to claim 2, characterized in that: A first threaded hole and a limiting hole are respectively provided on both sides of the movable plate (501); the first threaded hole matches the first threaded rod (503); and the inner wall of the limiting hole fits the outer wall of the limiting rod (504).

5. The coating device with multi-point coating liquid level control function according to claim 2, characterized in that: The inner wall of the shielding column (505) is in contact with the inner wall of the coating tube (402), and one end of the clamping block (509) extending out of the shielding column (505) is provided with a first inclined surface.

6. The coating device with multi-point coating liquid level control function according to claim 2, characterized in that: A second inclined surface is provided at the bottom end of the clamping block (509), and the top end of the extrusion frame (511) is in contact with the second inclined surface.

7. The coating device with multi-point coating liquid level control function according to claim 2, characterized in that: The outer wall of the transverse plate (507) is in contact with the inner wall of the transverse groove (508), and a semicircular surface is provided at one end of the extrusion frame (511) located in the inner cavity of the transverse groove (508).

8. The coating device with multi-point coating liquid level control function according to claim 3, characterized in that: A displacement groove for the displacement plate (602) to slide is provided at the top of the mounting frame (601), and a second threaded hole is provided on the outer wall of the displacement plate (602), and the second threaded hole matches the second threaded rod (604).

9. The coating device with multi-point coating liquid level control function according to claim 3, characterized in that: A third inclined surface is provided on one end of the lower pressing plate (609) facing the fixing block (615).

10. The coating device with multi-point coating liquid level control function according to claim 3, characterized in that: The outer wall of the slide rod (613) fits into the inner wall of the slide groove (614), and the slide groove (614) is inclined.

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