A device for inspecting defects in silver paste lines on touch screens

Abstract

This utility model discloses a device for inspecting defects in silver paste lines of touch screens, belonging to the technical field of silver paste line defect inspection. It includes a support plate, with a support frame fixedly connected to its upper surface. An infrared detector is fixedly installed on the inner top wall of the support frame. A DC power supply body is fixedly connected to the upper surface of the support plate. A screw is rotatably connected to the inner wall of the support plate, and an adjusting block is threadedly connected to the outer surface of the screw. This device, through the coordination of a vacuum pump, connecting pipe, and adsorption tank, can stably adsorb and fix the touch screen under test, avoiding workpiece displacement during inspection and affecting the test results. Simultaneously, rotating the screw drives the adjusting block to move the pressing block and the docking probe, achieving precise docking between the probe and the pins of the silver paste line. Power is supplied by the DC power supply body to apply a certain current to the silver paste line, while the infrared detector performs infrared detection on the silver paste line.

Description

Technical Field

[0001] This utility model belongs to the field of silver paste line defect inspection technology, and in particular relates to a touch screen silver paste line defect inspection device. Background Technology

[0002] Silver paste line defect inspection usually refers to the detection of defects that may occur during the coating, printing or soldering process of silver paste material used in electronic components, especially circuit boards. Silver paste is mainly used in circuit connections and conductive layers, and checking these defects is very important for ensuring the quality of electronic products.

[0003] Currently, existing touch screen silver paste line defect inspection devices mainly rely on appearance and impedance testing to inspect touch screen silver paste lines in actual use. However, due to the excellent conductivity of silver paste itself, some hidden defects inside the silver paste, such as minor scratches, cracks, and foreign objects, cannot be effectively detected, posing potential functional risks to the product.

[0004] To address this issue, we propose a device for inspecting defects in silver paste lines on touchscreens. Utility Model Content

[0005] The purpose of this invention is to solve the problem that existing technologies cannot better detect hidden defects, and to propose a touch screen silver paste line defect inspection device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A device for inspecting silver paste line defects in touch screens includes a support plate, a support frame fixedly connected to the upper surface of the support plate, an infrared detector fixedly installed on the inner top wall of the support frame, a DC power supply body fixedly connected to the upper surface of the support plate, a screw rotatably connected to the inner wall of the support plate, an adjusting block threadedly connected to the outer surface of the screw, two pressing blocks fixedly installed on the upper surface of the adjusting blocks, a mating probe fixedly connected to the outer surface of each pressing block, an adsorption groove formed on the upper surface of the support plate, a connecting pipe fixedly connected to the inside of the adsorption groove, a vacuum pump fixedly connected to the end of the connecting pipe away from the adsorption groove, the upper surface of the vacuum pump fixedly connected to the bottom surface of the support plate, and a solenoid valve fixedly connected to the outer surface of the connecting pipe.

[0008] Preferably, the bottom surface of the support plate is fixedly connected to four positioning frames, and each positioning frame has a positioning hole on its upper surface.

[0009] Preferably, two reinforcing blocks are fixedly connected to one side of the support frame near the adsorption tank, and the bottom surface of each reinforcing block is fixedly connected to the upper surface of the support plate.

[0010] Preferably, a rotating block is fixedly connected to the left end of the screw, and a plurality of anti-slip protrusions are fixedly connected to the outer surface of the rotating block.

[0011] Preferably, two guide posts are fixedly connected to the outer surface of the support plate, and the outer surface of each guide post is slidably connected to the inner wall of the adjusting block.

[0012] Preferably, a display is fixedly connected to one side of the support frame near the adsorption tank, and the display is electrically connected to the infrared detector via a wire.

[0013] Preferably, a pressure relief pipe is fixedly connected to the outer surface of the connecting pipe, and a control valve is fixedly connected to the outer surface of the pressure relief pipe.

[0014] Preferably, a stabilizing block is fixedly connected to the outer surface of the pressure relief pipe, and the upper surface of the stabilizing block is fixedly connected to the bottom surface of the support plate.

[0015] In summary, the technical effects and advantages of this utility model are as follows:

[0016] By coordinating a vacuum pump, connecting pipes, and adsorption tank, the touchscreen under test can be stably adsorbed and fixed, preventing workpiece displacement during testing from affecting the test results. Simultaneously, rotating the screw drives the adjusting block to move the pressing block and docking probe, achieving precise docking between the probe and the silver paste wire pins. Power is supplied by the DC power supply unit, applying a certain current to the silver paste wire. At the same time, an infrared detector head performs infrared detection on the silver paste wire, quickly identifying foreign object areas based on the presence of abnormal temperatures. This effectively avoids product malfunctions caused by undetected latent defects, significantly improving the factory quality and reliability of touchscreen products. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the support plate of this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the support frame of this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the screw of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the adjusting block of this utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of the support plate of this utility model viewed from below.

[0022] In the diagram: 1. Support plate; 2. Support frame; 3. DC power supply body; 4. Positioning frame; 5. Positioning hole; 6. Reinforcing block; 7. Infrared detector; 8. Display; 9. Screw; 10. Adjusting block; 11. Adsorption tank; 12. Guide column; 13. Rotating block; 14. Anti-slip protrusion; 15. Pressing block; 16. Docking probe; 17. Connecting pipe; 18. Vacuum pump; 19. Solenoid valve; 20. Pressure relief pipe; 21. Control valve; 22. Stabilizing block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figure 1-5 A touch screen silver paste line defect inspection device includes a support plate 1, a support frame 2 fixedly connected to the upper surface of the support plate 1, and four positioning frames 4 fixedly connected to the bottom surface of the support plate 1. Each positioning frame 4 has a positioning hole 5 on its upper surface. During the installation of the device, the positioning frame 4 can provide initial support and positioning for the support plate 1, ensuring that the support plate 1 will not shift during installation. The positioning hole 5 facilitates the use of bolts or other fasteners to fix the positioning frame 4 to the installation base, such as a workbench, further enhancing the stability of the entire device installation.

[0025] An infrared detector 7 is fixedly installed on the inner top wall of the support frame 2. A DC power supply body 3 is fixedly connected to the upper surface of the support plate 1. A screw 9 is rotatably connected to the inner wall of the support plate 1. A rotating block 13 is fixedly connected to the left end of the screw 9. Several anti-slip protrusions 14 are fixedly connected to the outer surface of the rotating block 13. The rotating block 13 increases the contact area between the hand and the screw 9, making it easier for the operator to apply force. The anti-slip protrusions 14 can increase the friction between the hand and the rotating block 13, effectively preventing slippage during rotation.

[0026] The outer surface of the screw 9 is threaded with an adjusting block 10. Two pressing blocks 15 are fixedly installed on the upper surface of the adjusting block 10. A docking probe 16 is fixedly connected to the outer surface of each pressing block 15. An adsorption groove 11 is opened on the upper surface of the support plate 1. Two reinforcing blocks 6 are fixedly connected to the side of the support frame 2 near the adsorption groove 11. The bottom surface of each reinforcing block 6 is fixedly connected to the upper surface of the support plate 1. The reinforcing blocks 6 can effectively enhance the connection strength between the support frame 2 and the support plate 1. An infrared detector 7 is installed on the inner top wall of the support frame 2. When the device is running, the support frame 2 needs to bear the weight of the infrared detector 7 and may be subject to slight external collisions or vibrations. The presence of the reinforcing blocks 6 can disperse the force at the connection between the support frame 2 and the support plate 1 and prevent the support frame 2 from deforming or loosening due to long-term force or accidental force.

[0027] The adsorption tank 11 is fixedly connected to the connecting pipe 17. Two guide posts 12 are fixedly connected to the outer surface of the support plate 1. The outer surface of each guide post 12 is slidably connected to the inner wall of the adjusting block 10. The guide post 12 can guide and restrict the movement direction of the adjusting block 10, so as to prevent the adjusting block 10 from rotating or deviating due to the thread transmission of the screw 9 during the movement, and ensure that the adjusting block 10 can move smoothly along the set straight direction.

[0028] A vacuum pump 18 is fixedly connected to the end of the connecting pipe 17 away from the adsorption tank 11. A display 8 is fixedly connected to the side of the support frame 2 near the adsorption tank 11. The display 8 is electrically connected to the infrared detector 7 through a wire. After the infrared detector 7 detects the defect information of the silver paste line of the touch screen, it can transmit the signal to the display 8 through the wire. The display 8 can then intuitively display the defect information to the operator in the form of an image.

[0029] The upper surface of the vacuum pump 18 is fixedly connected to the bottom surface of the support plate 1. The outer surface of the connecting pipe 17 is fixedly connected to the pressure relief pipe 20. The outer surface of the pressure relief pipe 20 is fixedly connected to the control valve 21. When it is necessary to remove the touch screen that has completed the test or replace the touch screen to be tested, the negative pressure in the adsorption tank 11 can be quickly released through the pressure relief pipe 20 by opening the control valve 21, so that the touch screen can be easily removed from the adsorption tank 11, which is convenient to operate.

[0030] A solenoid valve 19 is fixedly connected to the outer surface of the connecting pipe 17, and a stabilizing block 22 is fixedly connected to the outer surface of the pressure relief pipe 20. The upper surface of the stabilizing block 22 is fixedly connected to the bottom surface of the support plate 1. The stabilizing block 22 can fix and support the pressure relief pipe 20. During the operation of the device, the pressure relief pipe 20 may shake or shift due to the flow of internal airflow or the influence of external factors. The stabilizing block 22 can stably fix the pressure relief pipe 20 on the support plate 1.

[0031] The working principle of this utility model is as follows: In use, the operator first connects the infrared detector 7, display 8, vacuum pump 18, and solenoid valve 19 to an external power supply and controller. Then, the workpiece to be tested is placed on the adsorption tank 11 of the support plate 1 and its position is adjusted. Next, the vacuum pump 18 and solenoid valve 19 are turned on. The vacuum pump 18 evacuates the adsorption tank 11 through the connecting pipe 17, creating a negative pressure within the adsorption tank 11. This stably adsorbs the touchscreen to be tested onto the adsorption tank 11, preventing workpiece displacement from affecting the test results during the testing process. Then, the solenoid valve 19 is closed to maintain pressure. Next, the operator rotates the rotating block 13, which drives the screw 9 to rotate. Since the screw 9 is threadedly connected to the adjusting block 10, and the adjusting block 10 is restricted by the guide post 12 to move only in a straight line, the rotation of the screw 9 drives the adjusting block 10 to move smoothly along the guide post 12. The movement of the adjusting block 10 drives the pressing block... 15 and docking probe 16 are moved until docking probe 16 is precisely docked and pressed with the pins of the touch screen silver paste line. Then, the DC power supply body 3 is connected to the positive and negative terminals of docking probe 16 through wires. Then, a certain current is applied to the silver paste line by turning on the DC power supply body 3. The current is gradually increased from 0.1A to the silver paste line. At the same time, the infrared detector 7 performs infrared detection on the silver paste line. The infrared detector 7 can detect the temperature change of the silver paste line caused by the current passing through it, and determine whether there is a foreign object area based on whether there is an abnormal temperature. The slight heat is caused by the increase in resistance of the tiny defects inside the silver paste line when the current passes through it. The infrared detection can effectively detect the abnormal position, effectively solving the problem of defect inspection that is invisible to the naked eye and cannot be detected by existing impedance. After the inspection is completed, the control valve 21 is opened to quickly release the negative pressure in the adsorption tank 11, so that the inspected touch screen can be easily removed.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A touch screen silver paste line defect inspection apparatus comprising a support plate (1), characterized in that: A support frame (2) is fixedly connected to the upper surface of the support plate (1). An infrared detector (7) is fixedly installed on the inner top wall of the support frame (2). A DC power supply body (3) is fixedly connected to the upper surface of the support plate (1). A screw (9) is rotatably connected to the inner wall of the support plate (1). An adjusting block (10) is threadedly connected to the outer surface of the screw (9). Two pressing blocks (15) are fixedly installed on the upper surface of the adjusting block (10). A docking probe (16) is fixedly connected to the outer surface of each pressing block (15). An adsorption groove (11) is opened on the upper surface of the support plate (1). A connecting pipe (17) is fixedly connected inside the adsorption groove (11). A vacuum pump (18) is fixedly connected to the end of the connecting pipe (17) away from the adsorption groove (11). The upper surface of the vacuum pump (18) is fixedly connected to the bottom surface of the support plate (1). A solenoid valve (19) is fixedly connected to the outer surface of the connecting pipe (17).

2. The apparatus for inspecting a silver paste line defect of a touch screen according to claim 1, wherein: The bottom surface of the support plate (1) is fixedly connected to four positioning frames (4), and each positioning frame (4) has a positioning hole (5) on its upper surface.

3. The apparatus for inspecting a silver paste line defect of a touch screen according to claim 1, wherein: Two reinforcing blocks (6) are fixedly connected to one side of the support frame (2) near the adsorption tank (11), and the bottom surface of each reinforcing block (6) is fixedly connected to the upper surface of the support plate (1).

4. The apparatus for inspecting a silver paste line defect of a touch screen according to claim 1, wherein: The left end of the screw (9) is fixedly connected to a rotating block (13), and a number of anti-slip protrusions (14) are fixedly connected to the outer surface of the rotating block (13).

5. The apparatus for inspecting a silver paste line defect of a touch screen according to claim 1, wherein: Two guide posts (12) are fixedly connected to the outer surface of the support plate (1), and the outer surface of each guide post (12) is slidably connected to the inner wall of the adjusting block (10).

6. The touchscreen silver paste line defect inspection device according to claim 1, characterized in that: A display (8) is fixedly connected to one side of the support frame (2) near the adsorption tank (11), and the display (8) is electrically connected to the infrared detector (7) through a wire.

7. The apparatus of claim 1, wherein: The outer surface of the connecting pipe (17) is fixedly connected to a pressure relief pipe (20), and the outer surface of the pressure relief pipe (20) is fixedly connected to a control valve (21).

8. The apparatus of claim 7, wherein: The outer surface of the pressure relief pipe (20) is fixedly connected to a stabilizing block (22), and the upper surface of the stabilizing block (22) is fixedly connected to the bottom surface of the support plate (1).

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