A uniform spraying structure for three-proof coating

Abstract

This utility model discloses a three-proof coating uniform spraying structure, including a placement base and baffles fixedly connected to its top front and rear sides. A slide rail is provided on the top of the baffles. A clamping plate is fixedly connected to the placement base, and a display screen is attached to the left side of the clamping plate. The structure also includes: a coating mechanism: the coating mechanism includes a material box slidably connected between the baffles, a feeding port on the top of the material box, a sliding plate slidably connected inside the material box, a coating roller rotatably connected to the bottom of the sliding plate, and a rod inserted into the top of the sliding plate, with a spring at the top of the rod; and a driving mechanism: the driving mechanism is fixedly connected to the rear side of the baffles. This utility model discloses a three-proof coating uniform spraying structure that provides a more uniform and controllable coating effect on the surface of an LED display screen.

Description

Technical Field

[0001] This utility model relates to the field of three-proof coating technology for display screens, and in particular to a uniform spraying structure for three-proof coating. Background Technology

[0002] Conformal coating refers to applying a very thin layer of special protective material to electronic components and related electronic parts. This material conforms to or fits the contours of the circuit board, acting like a protective shield to isolate the circuit and components from the harsh external environment. When LED electronic displays placed outdoors are manufactured, a layer of conformal coating is applied to the LED beads on their surface to protect the screen.

[0003] However, the traditional method of coating LED displays is to manually brush or spray. This method is highly dependent on the personal experience and skill of the operator. The operator holds a spray gun or brush and relies on visual observation and subjective judgment to coat the surface of the LED module, which may result in uneven coating, missed coating, etc., affecting the coating quality. For example, when manually spraying LED displays, operators need to hold the spray gun and quickly cover the module surface, which can easily lead to missed areas and dead zones. At the same time, it is difficult to maintain a uniform speed when moving the spray gun. Often, the paint will accumulate too thickly in the center area of ​​the module due to prolonged pausing, while the coating will be too thin in the edge area due to excessive speed. This uneven coating will cause circuit corrosion in the missed areas in a humid environment, while the excessively thick coating will cause the LED chip to be squeezed due to stress, resulting in color difference or even dim / bright defects, ultimately greatly reducing the reliability and lifespan of the display. Utility Model Content

[0004] This utility model discloses a three-proof coating uniform spraying structure, which aims to solve the technical problem that the traditional method of coating LED displays is to manually brush or spray. This method is highly dependent on the personal experience and skill of the operator. The operator holds a spray gun or brush and relies on visual observation and subjective judgment to coat the surface of the LED module, which may result in uneven coating, missed coating, and other technical problems that affect the coating quality.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A three-proof coating uniform spraying structure includes a placement base and baffles fixedly connected to its front and rear sides. The baffles have a slide rail on their top. The placement base is fixedly connected to a clamping plate. A display screen is attached to the left side of the clamping plate. The structure also includes: a coating mechanism: the coating mechanism includes a material box slidably connected between the baffles. The material box has a feeding port on its top. A sliding plate is slidably connected inside the material box. A coating roller is rotatably connected to the bottom of the sliding plate. A rod is inserted into the top of the sliding plate. A spring is provided on the top of the rod. A drive mechanism: the drive mechanism is fixedly connected to the rear side of the baffles.

[0006] By adopting the above technical solution, the inherent defects of manual coating are solved. After the display screen is fixed in place, the slide rail on the baffle guides the material box to move at a uniform speed. Under the guidance of the insertion rod and the pressure of the spring, the four sets of sliding plates in the material box drive the coating roller to adapt to the undulations of the display screen surface. When the coating roller rolls, it evenly transfers the coating to every corner, including the gaps between LED beads and the bottom of components. The mechanical constant pressure overcomes the problems of unstable hand gestures, uneven speed and obstructed vision in manual operation, completely eliminating coating thickness fluctuations, edge paint accumulation and local missed coating, forming a complete and uniform protective film layer, which significantly improves the reliability and service life of the product in harsh environments.

[0007] As a further embodiment of this utility model: the driving mechanism includes a connecting rod fixedly connected to the middle of the front and rear sides of the material box, a roller rotatably connected to the surface of the connecting rod, a connecting plate fixedly connected to the rear end of the connecting rod, a threaded seat fixedly connected to the middle of the rear side of the connecting plate, a bidirectional lead screw threadedly connected to the middle of the threaded seat, and a servo motor fixedly connected to the left end of the bidirectional lead screw.

[0008] By adopting the above technical solution, precise and stable automated control is achieved. The servo motor drives the bidirectional lead screw to rotate precisely, which in turn drives the threaded seat and connecting plate to achieve linear transmission. This allows the connecting rod to drive the roller to move smoothly and uniformly along the slide rail. This rigid transmission structure eliminates speed fluctuations and trajectory deviations in manual operation, ensuring that the material box always maintains a linear motion. This allows the coating roller to complete the coating operation with constant pressure and speed, solving defects such as uneven coating thickness and paint accumulation at the edges caused by uneven movement speed. At the same time, the precise speed control of the servo motor can achieve coating speed adjustment for different process requirements, significantly improving the stability and consistency of coating quality.

[0009] In summary, this application includes at least one of the following beneficial technical effects: 1. More uniform coating: The adaptive roller coating mechanism with spring pressure allows the coating roller to fully conform to the uneven surface of the display screen, completely solving the problems of uneven thickness, missed coating and paint accumulation at the edges caused by manual coating, forming a complete and uniform protective film layer, which significantly improves the reliability and service life of the product in harsh environments.

[0010] 2. Coating is more controllable. The use of servo motor drive and precision ball screw transmission mechanism ensures that the material box moves smoothly and uniformly along the slide rail, eliminating speed fluctuations and trajectory deviations caused by manual operation. This achieves high-precision automated control of the coating process, greatly improving the consistency of coating quality and process adaptability.

[0011] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a uniform spraying structure for three-proof coating proposed in this utility model.

[0013] Figure 2 This is a display screen showing a uniform sprayed structure with three-proof coating proposed in this utility model.

[0014] Figure 3 This is a diagram illustrating a roller with a uniform spraying structure for three-proof coating proposed in this utility model.

[0015] Figure 4 This is a cross-sectional view of the coating mechanism for a uniform spraying structure for three-proof coating proposed in this utility model.

[0016] Figure 5 This is a schematic diagram of the drive mechanism for a uniform spraying structure with three-proof coating proposed in this utility model.

[0017] Figure 6 for Figure 5 Enlarged view of a portion of point A in the middle.

[0018] In the attached diagram: 1. Placement seat; 2. Baffle; 3. Slide rail; 4. Clamping plate; 5. Display screen; 6. Material box; 7. Feeding port; 8. Slide plate; 9. Coating roller; 10. Insert rod; 11. Spring; 12. Connecting rod; 13. Roller; 14. Connecting plate; 15. Threaded seat; 16. Two-way lead screw; 17. Servo motor; 18. Clamping block; 19. Placement port. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Reference Figures 1 to 5A three-proof coating uniform spraying structure includes a placement base 1 and baffles 2 fixedly connected to the front and rear sides of its top. The baffles 2 have a slide rail 3 on the top. The placement base 1 is fixedly connected to a card plate 4. A display screen 5 is attached to the left side of the card plate 4. The structure also includes: a coating mechanism: the coating mechanism includes a material box 6 slidably connected between the baffles 2. The material box 6 has a feeding port 7 on its top. A slide plate 8 is slidably connected inside the material box 6. A coating roller 9 is rotatably connected to the bottom of the slide plate 8. A rod 10 is inserted into the top of the slide plate 8. A spring 11 is provided on the top of the rod 10. A drive mechanism: the drive mechanism is fixedly connected to the rear side of the baffles 2.

[0021] Specifically, the conformal coating is injected into the material box 6 through the feeding port 7. Then, the display screen 5 to be coated is fixed on the placement seat 1 by the clamping plate 4. The material box 6 moves horizontally along the slide rail 3 on the baffle 2. At this time, the sliding plate 8 pushes the coating roller 9 downward under the continuous pressure of the spring 11, so that it fits tightly against the surface of the display screen 5. When the material box 6 moves, the coating roller 9 is passively rotated under the action of surface friction, and the coating in the material box 6 is evenly transferred to the surface of the display screen 5. At the same time, the spring 11 guides the sliding plate 8 to float up and down through the insert rod 10, so that the coating roller 9 can adapt to the undulations of the surface of the display screen 5, ensuring that the coating can fully fill the gaps between the LED beads and the bottom of the components, and finally complete the uniform coating operation without dead corners.

[0022] The feeding port 7 is located on the top left and right sides of the material box 6. There are four sliding plates 8, which are symmetrically connected in pairs to the front and back sides inside the material box 6. The front and back ends of the coating roller 9 are rotatably connected between the sliding plates 8 through bearings. The surface of the coating roller 9 is a soft cloth that can absorb the coating. The elastic deformation characteristics of the soft cloth surface can not only evenly absorb the coating, but also completely conform to the concave and convex structure of the display screen 5 surface, ensuring that the coating can fully penetrate into the gaps between LED beads and the bottom of components, which are difficult to cover by traditional coating.

[0023] The bottom of the material box 6 is provided with an opening corresponding to the coating roller 9. The bottom of the coating roller 9 is slightly lower than the bottom of the opening of the material box 6. The position slightly lower than the opening of the box body ensures that it maintains sufficient contact pressure with the surface of the display screen 5. The top of the plug rod 10 is fixedly connected to the top of the material box 6. One end of the spring 11 is fixedly connected to the top of the slide plate 8, and the other end of the spring 11 is fixedly connected to the top of the material box 6. The pressure of the spring 11 makes the coating roller 9 adapt to the undulation of the components at different heights.

[0024] Reference Figure 1 , Figure 3 , Figure 5 and Figure 6In a preferred embodiment, the drive mechanism includes a connecting rod 12 fixedly connected to the middle of the front and rear sides of the material box 6, a roller 13 rotatably connected to the surface of the connecting rod 12, a connecting plate 14 fixedly connected to the rear end of the connecting rod 12, a threaded seat 15 fixedly connected to the middle of the rear side of the connecting plate 14, a bidirectional lead screw 16 threadedly connected to the middle of the threaded seat 15, and a servo motor 17 fixedly connected to the left end of the bidirectional lead screw 16.

[0025] Specifically, after the servo motor 17 is powered on, it drives the bidirectional lead screw 16 to rotate precisely. Through the thread engagement with the threaded seat 15, the rotational motion is converted into linear displacement, which drives the connecting plate 14 to move smoothly along the axial direction. The connecting plate 14 transmits power to the entire material box 6 through the connecting rod 12. At the same time, the rollers 13 at both ends of the connecting rod 12 roll in the slide rail 3, forming a double guiding guarantee to ensure that the material box 6 runs in a straight line without shaking. By programming and controlling the speed and direction of the bidirectional lead screw 16 through the servo motor 17, the uniform reciprocating motion, stroke adjustment and precise positioning of the material box 6 can be realized, so that the coating roller 9 always completes the continuous and uniform coating operation at a constant linear speed.

[0026] Among them, the roller 13 is slidably connected inside the slide rail 3, the material box 6 is slidably connected between the baffles 2 through the roller 13, and the connecting plate 14 is fixedly connected to the rear end of the rear connecting rod 12. Through the precise cooperation between the roller 13 and the slide rail 3, the material box 6 can completely avoid shaking and deviation when moving. At the same time, the rolling design can reduce friction and improve the smoothness of sliding.

[0027] The bidirectional lead screw 16 is rotatably connected to the rear side of the baffle 2 via rotating seats on both the left and right sides. Limit rings are provided on both the left and right sides of the bidirectional lead screw 16. The servo motor 17 is fixedly connected to the rear side of the baffle 2 via a motor plate. The axial movement range of the bidirectional lead screw 16 is controlled by the limit rings to prevent the threaded seat 15 from overtravel and causing equipment damage.

[0028] Reference Figure 1 and Figure 2 In a preferred embodiment, a pad is provided at the bottom of the placement seat 1, and a placement opening 19 is provided on the surface of the front baffle 2. A locking block 18 is engaged with the front side of the placement seat 1 and fits against the left front corner of the display screen 5. The top of the display screen 5 is slightly higher than the bottom of the coating roller 9.

[0029] Specifically, the pad at the bottom of the placement seat 1 can play a certain role in shock absorption, absorbing the slight vibrations generated during the operation of the device. The cooperation between the locking block 18 and the locking plate 4 can effectively fix the display screen 5 and prevent it from moving during the coating process.

[0030] Working principle: In use, the display screen 5 is first placed on the placement base 1 and positioned and fixed by the clamping plate 4 and the clamping block 18. Then, the three-proof coating is injected into the material box 6 through the left and right symmetrical feeding ports 7. The coating liquid level submerges part of the coating roller 9. The servo motor 17 is started to drive the bidirectional lead screw 16 to rotate. Through the threaded seat 15, the connecting plate 14 and the connecting rod 12 move linearly, so that the roller 13 rolls smoothly along the slide rail 3, driving the material box 6 to move at a uniform speed. During this process, the four symmetrically distributed sliding plates 8 slide vertically under the guidance of the insertion rod 10, and the spring 11 continuously applies downward pressure. The coating roller 9 is pressed tightly against the surface of the display screen 5. Under the action of friction, the coating roller 9 is passively rotated, and its soft cloth surface continuously carries the coating from the material box 6. The coating is evenly transferred to the surface of the display screen 5 by mechanical pressure. When it encounters uneven components, the spring 11 pushes the slide plate 8 to adjust the height adaptively, ensuring that the coating roller 9 always remains in contact. The limit rings at both ends of the bidirectional lead screw 16 precisely control the movement stroke, so that the coating roller 9 completely covers the coating area, eliminating problems such as uneven thickness and missed coating dead corners in manual operation, and forming a complete and uniform three-proof protective layer on the surface of the display screen 5.

[0031] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A three-proof coating uniform spraying structure, comprising a placement base (1) and baffles (2) fixedly connected to the front and rear sides of its top, wherein the baffles (2) have a slide rail (3) on their top, and a clamping plate (4) is fixedly connected to the placement base (1), wherein a display screen (5) is attached to the left side of the clamping plate (4), characterized in that, Also includes: Coating mechanism: The coating mechanism includes a material box (6) slidably connected between the baffles (2), a feeding port (7) is provided on the top of the material box (6), a sliding plate (8) is slidably connected inside the material box (6), a coating roller (9) is rotatably connected to the bottom of the sliding plate (8), an insert rod (10) is inserted into the top of the sliding plate (8), and a spring (11) is provided on the top of the insert rod (10); Drive mechanism: The drive mechanism is fixedly connected to the rear side of the baffle (2).

2. The uniform spraying structure for three-proof coating according to claim 1, characterized in that, The feeding port (7) is located on the top left and right sides of the material box (6). There are four sliding plates (8). The four sliding plates (8) are symmetrically connected in pairs to the front and back sides inside the material box (6). The front and back ends of the coating roller (9) are rotatably connected between the sliding plates (8) through bearings. The surface of the coating roller (9) is a soft cloth that can absorb coating.

3. The uniform spraying structure for three-proof coating according to claim 2, characterized in that, The bottom of the material box (6) is provided with an opening corresponding to the coating roller (9). The bottom of the coating roller (9) is slightly lower than the bottom of the opening of the material box (6). The top of the insert rod (10) is fixedly connected to the top of the material box (6). One end of the spring (11) is fixedly connected to the top of the slide plate (8), and the other end of the spring (11) is fixedly connected to the top of the material box (6).

4. The uniform spraying structure for three-proof coating according to claim 1, characterized in that, The driving mechanism includes a connecting rod (12) fixedly connected to the middle of the front and rear sides of the material box (6). A roller (13) is rotatably connected to the surface of the connecting rod (12). A connecting plate (14) is fixedly connected to the rear end of the connecting rod (12). A threaded seat (15) is fixedly connected to the middle of the rear side of the connecting plate (14). A two-way lead screw (16) is threadedly connected to the middle of the threaded seat (15). A servo motor (17) is fixedly connected to the left end of the two-way lead screw (16).

5. The uniform spraying structure for three-proof coating according to claim 4, characterized in that, The roller (13) is slidably connected inside the slide rail (3), the material box (6) is slidably connected between the baffles (2) via the roller (13), and the connecting plate (14) is fixedly connected to the rear end of the connecting rod (12) on the rear side.

6. The uniform spraying structure for three-proof coating according to claim 5, characterized in that, The two-way lead screw (16) is rotatably connected to the back of the baffle (2) on both sides through a rotating seat. Limiting rings are provided on both sides of the two-way lead screw (16). The servo motor (17) is fixedly connected to the back of the baffle (2) through a motor plate.

7. The uniform spraying structure for three-proof coating according to claim 1, characterized in that, The bottom of the placement seat (1) is provided with a pad, and the surface of the front baffle (2) is provided with a placement opening (19). The front side of the placement seat (1) is fitted with a locking block (18) which is attached to the left front corner of the display screen (5). The top of the display screen (5) is slightly higher than the bottom of the coating roller (9).

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