Push-pull force testing machine for LCD (Liquid Crystal Display) screen

Abstract

The utility model relates to a push-pull force testing machine for an LCD (liquid crystal display) screen in the field of testing machines, which comprises a base, a push-pull mechanism and a testing platform are arranged on the surface of the base, the testing platform is used for placing and fixing a base of the LCD screen to be tested, and the push-pull mechanism can clamp the edge of the LCD screen to be tested. The push-pull mechanism comprises a supporting frame, a lifting assembly, a screen clamp and a pressure sensor, the lifting assembly is fixedly installed on the base through the supporting frame, the screen clamp is connected with the lifting assembly through the pressure sensor, and the screen clamp can move in the vertical direction relative to the testing platform through the lifting assembly; the screen clamp is composed of a connecting frame, an upper clamping jaw, a lower clamping jaw, a first driving guide rail and a second driving guide rail, so that the testing machine can flexibly adapt to LCD screens with different heights, thicknesses and widths, and the universality and testing compatibility of equipment are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of testing machines, and in particular to a push-pull force testing machine for LCD screens. Background Technology

[0002] In the LCD screen manufacturing process, push-pull force testing is a crucial step in ensuring screen quality and reliability. LCD screens may be subjected to various mechanical forces during actual use. Push-pull force testing simulates these real-world stress conditions, testing the screen's compressive, tensile, and bending resistance, thereby assessing its structural strength and durability. The results of push-pull force testing directly affect the product's yield rate and lifespan; therefore, the accuracy and compatibility of the testing equipment are paramount.

[0003] Existing LCD screen push-pull force testing machines typically include a base, a test platform, and a push-pull mechanism. The test platform is used to fix the base of the screen under test, while the push-pull mechanism clamps the edge of the screen with fixtures and applies push-pull force for testing. Traditional fixtures usually adopt a fixed spacing design, which cannot flexibly adjust the spacing between the upper and lower jaws, making it difficult to adapt to LCD screens of different heights, thicknesses, and widths. Utility Model Content

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides a push-pull force testing machine for LCD screens, which can effectively solve the technical problems.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A push-pull force testing machine for LCD screens includes a base. The surface of the base is provided with a push-pull mechanism and a testing platform. The testing platform is used to place and fix the base of the LCD screen to be tested. The push-pull mechanism can clamp the edge of the LCD screen to be tested. The push-pull mechanism includes a support frame, a lifting assembly, a screen clamp, and a pressure sensor. The lifting assembly is fixedly mounted on the base via the support frame. The screen clamp is connected to the lifting assembly via the pressure sensor. The screen clamp can move vertically relative to the testing platform via the lifting assembly. The screen clamp consists of a connecting frame, an upper clamp, a lower clamp, a first drive rail, and a second drive rail. The upper and lower clamps are respectively mounted on the surface of the connecting frame via the first and second drive rails. The connecting frame is located at the end furthest from the lifting assembly from the pressure sensor. The upper and lower clamps can move vertically on the surface of the connecting frame via the first and second drive rails. The upper and lower clamps are used to clamp the upper and lower ends of the LCD screen to be tested, respectively.

[0007] Furthermore, the upper gripper includes a base plate, a gripper seat, and two gripping blocks. The surface of the gripper seat is provided with several positioning holes. The two ends of the gripping blocks are connected to the positioning holes by bolts to fix them to the surface of the gripper seat. The end of the gripper seat away from the gripping blocks is mounted on the base plate. The base plate is fixedly connected to the slide of the first drive guide rail.

[0008] Furthermore, the surface of the clamp is provided with a dovetail groove, and the end of the clamp block near the clamp is provided with a matching dovetail block that is inserted into the dovetail groove. The clamp block can move along the dovetail groove on the surface of the clamp via the dovetail block.

[0009] Furthermore, the surface of the base plate is provided with a third drive rail, and the clamp is installed on the base plate through the third drive rail. The third drive rail can drive the clamp to move back and forth relative to the test platform.

[0010] Furthermore, the lifting assembly includes a drive motor, a lead screw, a nut, a guide post, and a bushing. The lead screw and the guide post are vertically arranged inside the support frame. The two ends of the lead screw are rotatably connected to the support frame through bearings. The drive motor is connected to one end of the lead screw. The nut is sleeved with the lead screw. The end of the pressure sensor away from the screen clamp is connected to the nut through a lifting base plate. The lifting base plate is slidably connected to the guide post through the bushing.

[0011] Furthermore, a control box is provided inside the base, and a button box is provided on the surface of the base. The pressure sensor, lifting assembly, button box, first drive rail and second drive rail are all electrically connected to the control box.

[0012] Furthermore, the surface of the test platform is provided with a product pressing block and several evenly arranged screw holes. The product pressing block can be fixed to the surface of the test platform by connecting it to any one of the screw holes with a screw.

[0013] Compared with existing technologies, the advantages of this invention are as follows: the upper and lower jaws of the screen clamp are independently mounted on the surface of the connecting frame via the first and second drive guide rails, respectively, and their spacing can be adjusted individually in the vertical direction. This allows the testing machine to flexibly adapt to LCD screens of different heights, thicknesses, and widths. For example, for ultra-thin screens, precise clamping can be achieved by reducing the spacing between the upper and lower jaws; for large-size screens, the jaw spacing can be increased to ensure that the clamping range covers the screen edges. In addition, the independent adjustment function of the upper and lower jaws also supports the testing needs of asymmetrical screens, significantly improving the versatility and testing compatibility of the equipment. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the push-pull mechanism in this utility model;

[0016] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0017] Figure 4 This is a structural diagram of the lifting component in this utility model;

[0018] Figure 5 This is a left view of the screen clamp in this utility model.

[0019] The diagram is labeled as follows: 1-Base, 2-Push-pull mechanism, 3-Test platform, 4-Button box, 5-Control box, 6-Support frame, 7-Lifting assembly, 701-Drive motor, 702-Lead screw, 703-Nut, 704-Guide post, 705-Busset, 706-Lifting base plate, 8-Screw clamp, 801-Connecting frame, 802-Upper gripper, 8021-Base plate, 8022-Clamping seat, 8122-Dovetail slide, 8023-Clamping block, 8123-Dovetail block, 8024-Third drive guide rail, 803-Lower gripper, 804-First drive guide rail, 805-Second drive guide rail, 9-Pressure sensor, 10-Product pressing block. Detailed Implementation

[0020] 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.

[0021] The following is combined Figures 1-5 The present invention provides a detailed description of the push-pull force testing machine for LCD screens:

[0022] A push-pull force testing machine for LCD screens includes a base 1. A push-pull mechanism 2 and a testing platform 3 are provided on the surface of the base 1. The testing platform 3 is used to place and fix the base of the LCD screen to be tested. The push-pull mechanism 2 can clamp the edge of the LCD screen to be tested. The push-pull mechanism 2 includes a support frame 6, a lifting assembly 7, a screen clamp 8, and a pressure sensor 9. The lifting assembly 7 is fixedly mounted on the base 1 via the support frame 6. The screen clamp 8 is connected to the lifting assembly 7 via the pressure sensor 9. The screen clamp 8 can move vertically relative to the testing platform 3 via the lifting assembly 7. The screen clamp 8 is connected by a connecting frame. 801, upper gripper 802, lower gripper 803, first drive rail 804, and second drive rail 805. The upper gripper 802 and lower gripper 803 are respectively mounted on the surface of the connecting frame 801 via the first drive rail 804 and the second drive rail 805. The connecting frame 801 is located at the end of the pressure sensor 9 away from the lifting assembly 7. The upper gripper 802 and lower gripper 803 can move vertically on the surface of the connecting frame 801 via the first drive rail 804 and the second drive rail 805. The upper gripper 802 and lower gripper 803 are used to clamp the upper and lower ends of the LCD screen to be tested, respectively.

[0023] The upper jaw 802 and lower jaw 803 of the screen clamp 8 are independently mounted on the surface of the connecting frame 801 via the first drive guide rail 804 and the second drive guide rail 805, respectively. Their spacing can be adjusted individually in the vertical direction, allowing the testing machine to flexibly adapt to LCD screens of different heights, thicknesses, and widths. For example, for ultra-thin screens, precise clamping can be achieved by reducing the spacing between the upper and lower jaws 803; for large screens, the jaw spacing can be increased to ensure the clamping range covers the screen edges. Furthermore, the independent adjustment function of the upper and lower jaws 803 also supports the testing needs of asymmetrical screens, significantly improving the equipment's versatility and testing compatibility.

[0024] The upper gripper 802 includes a base plate 8021, a clamping seat 8022, and two clamping blocks 8023. The surface of the clamping seat 8022 is provided with several positioning holes. The two ends of the clamping blocks 8023 are connected to the positioning holes by bolts to fix them to the surface of the clamping seat 8022. The end of the clamping seat 8022 away from the clamping blocks 8023 is installed on the base plate 8021. The base plate 8021 is fixedly connected to the slide of the first drive guide rail 804. The position of the clamping blocks 8023 can be flexibly adjusted according to the shape and size of the edge of the LCD screen to ensure that the clamping force is evenly distributed and to avoid screen damage or test data deviation caused by uneven clamping. The surface of the clamping base 8022 is provided with a dovetail groove 8122. The end of the clamping block 8023 near the clamping base 8022 is provided with a dovetail block 8123 that is paired and inserted into the dovetail groove 8122. The clamping block 8023 can move along the dovetail groove 8122 on the surface of the clamping base 8022 through the dovetail block 8123, which improves the movement accuracy of the clamping block 8023 on the clamping base 8022 and also ensures that the clamping block 8023 will not shift or loosen during the test, further improving the stability and reliability of clamping. The structure of the lower jaw 803 is the same as that of the upper jaw 802, and the upper jaw 802 and the lower jaw 803 are arranged opposite to each other.

[0025] The base plate 8021 has a third drive rail 8024 on its surface. The clamp 8022 is mounted to the base plate 8021 via the third drive rail 8024. The third drive rail 8024 can drive the clamp 8022 to move back and forth relative to the test platform 3, allowing the clamp 8023 to accurately align with the edges of LCD screens of different sizes. This design further expands the adaptability of the test machine, especially suitable for testing large-size or irregularly shaped screens, improving the flexibility and testing efficiency of the equipment.

[0026] The lifting assembly 7 includes a drive motor 701, a lead screw 702, a nut 703, a guide post 704, and a bushing 705. The lead screw 702 and the guide post 704 are vertically arranged inside the support frame 6. The two ends of the lead screw 702 are rotatably connected to the support frame 6 through bearings. The drive motor 701 is connected to one end of the lead screw 702. The nut 703 is sleeved with the lead screw 702. The end of the pressure sensor 9 away from the screen clamp 8 is connected to the nut 703 through a lifting base plate 706. The lifting base plate 706 is slidably connected to the guide post 704 through the bushing 705. A control box 5 is provided inside the base 1, and a button box 4 is provided on the surface of the base 1. The pressure sensor 9, the lifting assembly 7, the button box 4, the first drive guide rail 804, and the second drive guide rail 805 are all electrically connected to the control box 5. Users can set test parameters, adjust the gripper spacing, and automate the test process through the button box 4 or an external control system, significantly improving test efficiency and ease of operation.

[0027] The surface of the test platform 3 is provided with a product pressure block 10 and several evenly arranged screw holes. The product pressure block 10 can be fixed to the surface of the test platform 3 by connecting it to any one of the screw holes with a screw. The position of the pressure block can be flexibly adjusted according to the size and shape of the LCD screen base to ensure that the LCD screen is firmly fixed during the test and to avoid test data deviation or screen damage caused by the base being loose.

[0028] Working process: The LCD screen to be tested is placed on the test platform 3. The base of the LCD screen is fixed by the product pressure block 10. The upper jaw 802 and the lower jaw 803 are moved to the periphery of the LCD screen by the first drive guide rail 804 and the second drive guide rail 805. The third drive guide rail 8024 drives the clamp 8022 to align with the edge of the LCD screen. The two clamping blocks 8023 on each clamp 8022 are attached to and fixed with the edge of the LCD screen. The drive motor 701 rotates and drives the lead screw 702 to move the nut 703. The nut 703 drives the entire screen clamp 8 to move through the lifting base plate 706 and the pressure sensor 9. The pressure sensor 9 collects the force on the LCD screen.

[0029] 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 push-pull force testing machine for LCD screens, comprising a base, a push-pull mechanism and a testing platform disposed on the surface of the base, the testing platform being used to place and fix the base of the LCD screen to be tested, and the push-pull mechanism being capable of clamping the edge of the LCD screen to be tested, characterized in that: The push-pull mechanism includes a support frame, a lifting assembly, a screen clamp, and a pressure sensor. The lifting assembly is fixedly mounted on the base via the support frame. The screen clamp is connected to the lifting assembly via the pressure sensor. The screen clamp can move vertically relative to the test platform via the lifting assembly. The screen clamp consists of a connecting frame, an upper clamp, a lower clamp, a first drive rail, and a second drive rail. The upper and lower clamps are respectively mounted on the surface of the connecting frame via the first and second drive rails. The connecting frame is located at the end away from the lifting assembly from the pressure sensor. The upper and lower clamps can move vertically on the surface of the connecting frame via the first and second drive rails. The upper and lower clamps are used to clamp the upper and lower ends of the LCD screen to be tested, respectively.

2. The push-pull force testing machine for LCD screens according to claim 1, characterized in that: The upper gripper includes a base plate, a gripper seat, and two gripping blocks. The surface of the gripper seat is provided with several positioning holes. The two ends of the gripping blocks are connected to the positioning holes by bolts to fix them to the surface of the gripper seat. The end of the gripper seat away from the gripping blocks is installed on the base plate. The base plate is fixedly connected to the slide of the first drive guide rail.

3. The push-pull force testing machine for LCD screens according to claim 2, characterized in that: The surface of the clamp is provided with a dovetail groove, and the end of the clamp block near the clamp is provided with a matching dovetail block that is inserted into the dovetail groove. The clamp block can move along the dovetail groove on the surface of the clamp through the dovetail block.

4. The push-pull force testing machine for LCD screens according to claim 2, characterized in that: The surface of the base plate is provided with a third drive rail, and the clamp is installed on the base plate through the third drive rail. The third drive rail can drive the clamp to move back and forth relative to the test platform.

5. The push-pull force testing machine for LCD screens according to any one of claims 1-4, characterized in that: The lifting assembly includes a drive motor, a lead screw, a nut, a guide post, and a bushing. The lead screw and the guide post are vertically arranged inside the support frame. The two ends of the lead screw are rotatably connected to the support frame through bearings. The drive motor is connected to one end of the lead screw. The nut is sleeved with the lead screw. The end of the pressure sensor away from the screen clamp is connected to the nut through a lifting base plate. The lifting base plate is slidably connected to the guide post through the bushing.

6. The push-pull force testing machine for LCD screens according to any one of claims 1-4, characterized in that: The base contains a control box, and the surface of the base is equipped with a button box. The pressure sensor, lifting assembly, button box, first drive rail and second drive rail are all electrically connected to the control box.

7. The push-pull force testing machine for LCD screens according to any one of claims 1-4, characterized in that: The surface of the test platform is provided with a product pressing block and several evenly arranged screw holes. The product pressing block can be fixed to the surface of the test platform by connecting it to any one of the screw holes with a screw.

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