A LCD screen stress testing device

Abstract

The utility model relates to LCD screen test technical field discloses a kind of LCD screen stress testing device, including test table and the LCD screen component of engagement in test table, the top of test table one side is fixed with fixed plate, another side is fixed with two support plates, and the top between two support plates is fixed with connecting plate;The top of fixed plate is fixed with fixed block one, the side of fixed block one is equipped with servo motor one, and the movable plate driven by servo motor one is arranged between fixed plate and connecting plate, the pressure head can be made transverse motion and can be made longitudinal motion by driving, so that pressure can be applied in the different positions of screen body, so that stress test is realized in the different positions of screen body, the stress condition of screen body local position is conveniently obtained, and the test effect is more accurate by the test of multiple points, and whether screen body is good product can be judged more.

Description

Technical Field

[0001] This utility model relates to the field of LCD screen testing technology, specifically to an LCD screen force testing device. Background Technology

[0002] LCD stands for Liquid Crystal Display, also known as a liquid crystal display screen. LCD screens are currently the most mature display technology, and due to factors such as cost, yield rate, and market acceptance, they are the most widely used screen display technology. After LCD screens are manufactured, they often undergo stress testing to ensure product yield and guarantee normal product use.

[0003] As mentioned in the patent publication CN219573759U, a screen LCD force testing mechanism specifically describes: "It includes a testing platform, with cylinders fixedly connected to both sides of the testing platform. Connecting blocks are fixedly connected to the piston rods of the two cylinders. A testing plate is fixedly connected between the two connecting blocks. A pressure sensor is fixedly installed on the upper end of the testing plate. A pressure table is fixedly connected to the lower end of the testing plate. A limiting groove is opened at the upper end of the testing platform. Slide plates are slidably arranged on the two side walls of the limiting groove. Multiple base plates are fixedly connected between the two slide plates. A side plate is fixedly connected to one side of the two slide plates. A feeding mechanism is provided on one side of the two slide plates. The feeding mechanism includes a rectangular groove, a lead screw, and a lead screw nut. The rectangular groove is opened inside the testing platform. The feeding mechanism, slide plates, base plates, pressure sensors, and cylinders work together to facilitate the feeding of the LCD screen into the limiting groove, which is convenient for testing."

[0004] Through the search of the above solutions, we found that there are still some defects in the solution. When conducting force tests on the LCD screen, the force on the LCD screen is achieved by pressing down on the pressure table, that is, the entire surface of the LCD screen is subjected to force. However, this method is difficult to obtain the force situation of local parts of the LCD screen, that is, it is inconvenient to conduct force tests at different locations of the LCD screen. Summary of the Invention

[0005] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an LCD screen force testing device, comprising a test platform and an LCD screen assembly fitted in the test platform. A fixed plate is fixed on one side of the top of the test platform, and two support plates are fixed on the other side. A connecting plate is fixed at the top between the two support plates. A first fixed block is fixed at the top of the fixed plate, and a first servo motor is installed on one side of the first fixed block. A movable plate driven by the first servo motor is provided between the fixed plate and the connecting plate. A second servo motor is installed on one side of the top of the movable plate. A movable groove is opened at the bottom of the movable plate, and a movable block driven by the second servo motor is slidably connected in the movable groove. An electric telescopic rod is installed at the bottom of the movable block, and a pressure head is fixed at the bottom of the power output shaft of the electric telescopic rod.

[0007] As a further embodiment of this utility model: the top of the test platform is provided with a test groove, and the inner walls of the test groove are provided with limiting grooves on both sides, and a rubber pad is fixed in the inner wall of each limiting groove. The LCD screen assembly includes an outer frame and a screen body disposed inside the outer frame. The two sides of the outer frame are respectively placed into the two limiting grooves, and the screen body is located below the pressure head.

[0008] As a further embodiment of this utility model: threaded rods are threadedly connected to the front and rear sides of the test platform and to the positions corresponding to the center of the limiting groove. One end of the threaded rod is fixed with a handle, and the other end movably passes through the test platform and is fixed with a circular extrusion block. The side of the extrusion block is movably fitted with a rubber pad.

[0009] As a further embodiment of this utility model: a lead screw is driven and connected to the power output shaft of the servo motor, and the end of the lead screw away from the servo motor is rotatably connected to the connecting plate. A fixing block is fixed at the center of the top of the movable plate, and the fixing block is threadedly connected to the lead screw.

[0010] As a further embodiment of this utility model: the front and rear sides of the movable plate are movably connected by limit rods, and the two ends of the limit rods are respectively fixed to the fixed plate and the support plate.

[0011] As a further embodiment of this utility model: the power output shaft of the servo motor 2 extends movably through a cavity opened on one side of the bottom of the movable plate and is connected to a bevel gear 1. A bevel gear 2 meshes with one side of the bevel gear 1, and a lead screw 2 is connected to one side of the bevel gear 2. The end of the lead screw 2 away from the bevel gear 2 is threaded through the movable block and rotatably connected to the inner wall of the movable groove.

[0012] As a further embodiment of this utility model: the pressure head is made of silicone and designed as a spherical structure.

[0013] As a further embodiment of this utility model: the movable plate is kept away from the top of the test platform by the support of the fixed plate and the support plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] In this application, through the design of the test platform, servo motor one, servo motor two, movable plate, and pressure head, the pressure head can be driven to move both horizontally and vertically, thereby applying pressure to different positions on the screen body. This enables force testing at different locations on the screen body, facilitating the determination of the force on local areas of the screen body. Testing at multiple points makes the test results more accurate and allows for better determination of whether the screen body is a good product, effectively preventing defective products from being used or entering the market. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0017] Figure 2 This is a side sectional view of the test bench of this utility model.

[0018] Figure 3 This is a three-dimensional structural diagram of the movable plate of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the LCD screen assembly of this utility model in the limiting groove.

[0020] The reference numerals and names in the figure are as follows:

[0021] 1. Test bench; 2. Test slot; 201. Limit slot; 202. Rubber pad; 3. Fixing plate; 4. Fixing block one; 5. Servo motor one; 501. Lead screw one; 6. Support plate; 7. Connecting plate; 8. Limiting rod; 9. Movable plate; 901. Fixing block two; 902. Movable slot; 10. Threaded rod; 1001. Extrusion block; 11. Servo motor two; 1101. Bevel gear one; 12. Electric telescopic rod; 13. Pressure head; 14. Bevel gear two; 1401. Lead screw two; 15. Movable block; 16. LCD screen assembly; 1601. Outer frame; 1602. Screen body. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-4 An LCD screen stress testing device includes a test platform 1 and an LCD screen assembly 16 engaged in the test platform 1. A fixing plate 3 is fixed to one side of the top of the test platform 1, and two support plates 6 are fixed to the other side. A connecting plate 7 is fixed at the top between the two support plates 6. A fixing block 4 is fixed to the top of the fixing plate 3, and a servo motor 5 is installed on one side of the fixing block 4. A movable plate 9 driven by the servo motor 5 is disposed between the fixing plate 3 and the connecting plate 7. The movable plate 9 is supported by the fixing plate 3 and the support plates 6, keeping it away from the top of the test platform 1. The movable plate 9 has a certain height, allowing the operator to easily observe the test. A servo motor 11 is installed on one side of the top. A movable groove 902 is opened at the bottom of the movable plate 9. A movable block 15 driven by the servo motor 11 is slidably connected in the movable groove 902. An electric telescopic rod 12 is installed at the bottom of the movable block 15. A pressure head 13 is fixed at the bottom of the power output shaft of the electric telescopic rod 12. The electric telescopic rod 12 can drive the pressure head 13 to rise or fall. The pressure head 13 is made of silicone and designed with a spherical structure. The spherical silicone pressure head 13 has good softness, which can avoid causing pressure damage to the screen body 1602, and can also simulate the touch pressure applied by the finger to the screen body 1602 during daily use.

[0024] Please see Figure 1 , Figure 2 and Figure 4 In this embodiment, a test groove 2 is provided on the top of the test platform 1. Limiting grooves 201 are provided on both sides of the inner wall of the test groove 2, and a rubber pad 202 is fixed in the inner wall of each limiting groove 201. The LCD screen assembly 16 includes an outer frame 1601 and a screen body 1602 disposed inside the outer frame 1601. The two sides of the outer frame 1601 are respectively placed into the two limiting grooves 201, and the screen body 1602 is located below the pressure head 13.

[0025] Specifically, the outer frame 1601 has power cords, which can easily power the screen body 1602. The limiting groove 201 can easily insert the outer frame 1601 of the LCD screen assembly 16, thereby providing a limiting and stabilizing effect for the entire LCD screen assembly 16. In conjunction with the rubber pad 202 set inside the limiting groove 201, damage to the outer frame 1601 can be avoided during insertion or removal, and soft support can also be provided for the outer frame 1601 during testing. The screen body 1602 is located below the pressure head 13, which can facilitate the pressure head 13 to perform pressure testing on the top of the screen body 1602.

[0026] Please see Figure 1 and Figure 2 In this embodiment, threaded rods 10 are threadedly connected to both the front and rear sides of the test platform 1 at positions corresponding to the middle of the limiting groove 201. One end of the threaded rod 10 is fixed with a handle, and the other end moves through the test platform 1 and is fixed with a circular extrusion block 1001. The side of the extrusion block 1001 is in movable contact with the rubber pad 202.

[0027] Specifically, after the LCD screen assembly 16 is placed in the limiting groove 201, the threaded rod 10 can be turned to drive the extrusion block 1001 to extrude the rubber pad 202. The pressure of the extrusion block 1001 can be used to make the force-bearing position of the rubber pad 202 tightly fit against the outer frame 1601, thereby clamping the entire LCD screen assembly 16 and ensuring the stability of the LCD screen assembly 16 during testing.

[0028] Please see Figure 1 , Figure 2 and Figure 3 In this embodiment, a lead screw 501 is driven and connected to the power output shaft of the servo motor 5. The end of the lead screw 501 away from the servo motor 5 is rotatably connected to the connecting plate 7. A fixing block 901 is fixed at the center of the top of the movable plate 9. The fixing block 901 is threadedly connected to the lead screw 501. Limiting rods 8 are movably passed through both the front and rear sides of the movable plate 9. The two ends of the limiting rods 8 are fixed to the fixing plate 3 and the support plate 6, respectively.

[0029] Specifically, after the servo motor 5 starts, it can drive the lead screw 501 to rotate, thereby causing the fixed block 901 to move. The movement of the fixed block 901 causes the movable plate 9 to move. When the movable plate 9 moves, the movable silicone of the movable plate 9 can be limited by the limit rods 8 on both sides, making its movement more stable. When the movable plate 9 moves, it can drive the pressure head 13 to move laterally.

[0030] Please see Figure 1 and Figure 2In this embodiment, the power output shaft of the servo motor 11 extends through a cavity on one side of the bottom of the movable plate 9 and is connected to a bevel gear 1101. One side of the bevel gear 1101 meshes with a bevel gear 14, and one side of the bevel gear 14 is connected to a lead screw 1401. The end of the lead screw 1401 away from the bevel gear 14 is threaded through the movable block 15 and rotatably connected to the inner wall of the movable groove 902.

[0031] Specifically, after the servo motor 11 is started, it can drive the bevel gear 1101 to rotate, thereby driving the bevel gear 14 meshing with it to rotate, which in turn drives the lead screw 1401 to rotate. When the lead screw 1401 rotates, it can drive the movable block 15 threaded with it to move inside the movable groove 902, thereby driving the electric telescopic rod 12 and the pressure head 13 to move longitudinally.

[0032] When using:

[0033] The staff can first slide the LCD screen assembly 16 to be tested between the two limiting slots 201 of the test slot 2, tighten the threaded rod 10 to achieve stable clamping of the LCD screen assembly 16, and then start the electric telescopic rod 12. The power output shaft of the electric telescopic rod 12 pushes the pressure head 13 down, so that the bottom of the pressure head 13 presses on the screen body 1602, thereby making the screen body 1602 bear force.

[0034] After servo motor 5 is started, the power output shaft of servo motor 5 drives lead screw 501 to rotate, thereby driving the movable plate 9 to move laterally above the test platform 1, which can drive the pressure head 13 to adjust its lateral position. By starting servo motor 11, lead screw 1401 can be driven to rotate, thereby driving movable block 15 to move longitudinally at the bottom of movable plate 9, which can drive the pressure head 13 to adjust its longitudinal position. Through the drive of servo motor 5 and servo motor 11, the pressure head 13 can be moved to different positions on the top of the screen body 1602, thereby realizing force testing at different positions of the screen body 1602.

[0035] After the screen body 1602 has undergone stress tests at different locations, the wires on the LCD screen assembly 16 can be connected to an external power source to power and illuminate the screen body 1602. The staff can observe the situation after the screen body 1602 is illuminated to determine whether the LCD screen assembly 16 is a qualified product. That is, if the screen body 1602 can still display completely and function normally after multiple stress tests at different locations, it means that the LCD screen assembly 16 is a qualified product. Conversely, if the LCD screen assembly 16 cannot display completely or functions abnormally, it means that the LCD screen assembly 16 is a defective product.

[0036] The LCD screen assembly 16 can also be powered on during the test. The specific method can be determined according to the actual test situation. The distance that the electric telescopic rod 12 drives the pressure head 13 to descend can be set in advance. It can be standardized with reference to the test distance of qualified products. The specific descent distance can be determined according to the actual test situation.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A stress testing device for an LCD screen, comprising a test platform (1) and an LCD screen assembly (16) engaged in the test platform (1), characterized in that, The test bench (1) has a fixed plate (3) on one side of its top and two support plates (6) on the other side. A connecting plate (7) is fixed between the two support plates (6). The top of the fixed plate (3) is fixed with a fixed block (4), and a servo motor (5) is installed on one side of the fixed block (4). A movable plate (9) driven by the servo motor (5) is provided between the fixed plate (3) and the connecting plate (7). A servo motor (11) is installed on one side of the top of the movable plate (9). A movable groove (902) is opened at the bottom of the movable plate (9). A movable block (15) driven by the servo motor (11) is slidably connected in the movable groove (902). An electric telescopic rod (12) is installed at the bottom of the movable block (15). A pressure head (13) is fixed at the bottom of the power output shaft of the electric telescopic rod (12).

2. The LCD screen force testing device according to claim 1, characterized in that, The test bench (1) has a test slot (2) on its top. The inner walls of the test slot (2) are provided with limit slots (201) on both sides. Each limit slot (201) has a rubber pad (202) fixed in its inner wall. The LCD screen assembly (16) includes an outer frame (1601) and a screen body (1602) disposed inside the outer frame (1601). The two sides of the outer frame (1601) are respectively placed into the two limit slots (201). The screen body (1602) is located below the pressure head (13).

3. The LCD screen force testing device according to claim 2, characterized in that, The front and rear sides of the test bench (1) and the corresponding positions in the middle of the limiting groove (201) are threaded with threaded rods (10). One end of the threaded rod (10) is fixed with a handle, and the other end moves through the test bench (1) and is fixed with a circular extrusion block (1001). The side of the extrusion block (1001) is in contact with the rubber pad (202).

4. The LCD screen force testing device according to claim 1, characterized in that, A lead screw (501) is connected to the power output shaft of the servo motor (5). The end of the lead screw (501) away from the servo motor (5) is rotatably connected to the connecting plate (7). A fixing block (901) is fixed at the center of the top of the movable plate (9). The fixing block (901) is threadedly connected to the lead screw (501).

5. The LCD screen force testing device according to claim 4, characterized in that, The front and rear sides of the movable plate (9) are movably connected to the limiting rods (8), and the two ends of the limiting rods (8) are fixed on the fixed plate (3) and the support plate (6) respectively.

6. The LCD screen force testing device according to claim 1, characterized in that, The power output shaft of the servo motor 2 (11) extends through a cavity opened on one side of the bottom of the movable plate (9) and is connected to a bevel gear 1 (1101). A bevel gear 2 (14) meshes with one side of the bevel gear 1 (1101). A lead screw 2 (1401) is connected to one side of the bevel gear 2 (14). The end of the lead screw 2 (1401) away from the bevel gear 2 (14) is threaded through the movable block (15) and rotatably connected to the inner wall of the movable groove (902).

7. The LCD screen force testing device according to claim 1, characterized in that, The pressure head (13) is made of silicone and designed as a spherical structure.

8. The LCD screen force testing device according to claim 1, characterized in that, The movable plate (9) is moved away from the top of the test bench (1) by the support of the fixed plate (3) and the support plate (6).

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