Clamp for detecting liquid crystal display screen
By using a cylinder-driven clamping block and a motor adjustment assembly, the clamping force control and adaptability issues of the LCD screen detection fixture are solved, achieving stable clamping and angle adjustment, thereby improving detection accuracy and applicability.
Patent Information
- Application Number
- CN202423293157.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing LCD screen testing fixtures are difficult to control the clamping force precisely, have poor adaptability, are prone to scratching or damaging the screen, and lack testing stability.
The design features a cylinder-driven clamping block with a sponge pad, combined with a motor-driven disc adjustment component, enabling stable clamping and angle adjustment to accommodate displays of different shapes.
It improves clamping stability, prevents screen scratches, ensures detection accuracy and stability, simplifies the operation process, and adapts to displays of different shapes.
Smart Images
Figure CN223863734U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of liquid crystal display screen testing technology, and in particular to a fixture for testing liquid crystal display screens. Background Technology
[0002] A liquid crystal display (LCD) screen uses liquid crystal material as its basic component. The liquid crystal material is filled between two parallel plates. By changing the arrangement of the molecules inside the liquid crystal material through voltage, the purpose of blocking and transmitting light is achieved to display images of varying depths and staggered patterns. It is a common flat panel display technology that is widely used in various electronic devices. An LCD screen is composed of multiple pixels, and each pixel is composed of liquid crystal molecules and transparent electrodes.
[0003] Currently used fixtures for testing LCD screens typically consist of basic components such as a fixed frame and clamping arms. The clamping arms are generally manually adjusted using mechanical structures such as screws and nuts, while some use simple elastic clamps to provide clamping force. The fixed frame supports the overall structure and is mostly made of metal to ensure sufficient strength.
[0004] While current fixtures can hold LCD screens, they often suffer from difficulties in precisely controlling the clamping force, poor adaptability to screens of different sizes and shapes, and relatively cumbersome operation. Furthermore, some fixtures lack effective cushioning designs and structures that fit snugly against the screen, making them prone to scratching or damaging the screen during clamping. They also cannot guarantee the stability of the screen during testing, leading to frequent displacement and shaking problems that affect testing accuracy. Therefore, a new fixture for LCD screen testing is proposed to solve the above problems. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a fixture for testing liquid crystal displays, which aims to improve the problem that some existing fixtures lack effective buffer design and a structure that fits tightly to the screen, making it easy to scratch the display screen during clamping and affecting the accuracy of testing.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A fixture for testing liquid crystal displays includes a worktable, a support column fixedly connected to the bottom of the worktable, a disc rotatably connected to the middle of the worktable, a clamping assembly installed on the outside of the disc, and an adjustment assembly installed inside the disc.
[0008] The clamping assembly includes a fixing plate, which is fixedly connected to the outside of the disc. A slide rod is fixedly connected inside the fixing plate. A connecting block is slidably connected to the outside of the slide rod. A clamping block is fixedly connected to the outside of the connecting block. A sponge pad is fixedly connected inside the clamping block. A cylinder is fixedly connected to the outside of the connecting block. The end of the cylinder is fixedly connected to the outside of the fixing plate.
[0009] As a further description of the above technical solution:
[0010] The adjustment assembly includes a motor base, which is fixedly connected to the bottom of the workbench. A drive motor is fixedly connected inside the motor base. A second gear is fixedly connected to the output end of the drive motor. A first gear is rotatably connected to the middle of the workbench. The second gear meshes with the first gear.
[0011] As a further description of the above technical solution:
[0012] A fixed shaft is fixedly connected inside the fixed plate, a rotating block is rotatably connected outside the fixed shaft, a connecting rod is fixedly connected outside the rotating block, and the other end of the connecting rod is fixedly connected outside the connecting block.
[0013] As a further description of the above technical solution:
[0014] A slider is fixedly connected to the bottom of the connecting block, and the slider is slidably connected to the outside of the slide rod;
[0015] As a further description of the above technical solution:
[0016] Limit blocks are fixedly connected to both ends of the slide rod;
[0017] As a further description of the above technical solution:
[0018] A fixed plate is fixedly connected to the middle of the workbench, and the gear is rotatably connected to the outside of the fixed plate.
[0019] As a further description of the above technical solution:
[0020] A fixing rod is fixedly connected inside the gear one, and the fixing rod is fixedly connected inside the disk;
[0021] As a further description of the above technical solution:
[0022] A circular groove is provided in the middle of the workbench, and the disc is rotatably connected inside the circular groove.
[0023] This utility model has the following beneficial effects:
[0024] 1. In this utility model, a cylinder drives the clamping block to extend and retract, thereby achieving stable clamping of the LCD screen. The clamping block is equipped with a sponge pad, which can effectively cushion the impact and prevent the clamping block from scratching or damaging the screen. It can also fit tightly against the screen, improving the clamping stability and preventing displacement or shaking during testing due to unstable fixation. This ensures accurate and reliable test results, makes the horizontal movement of the clamping block more stable, and can be adapted to screens of different shapes, thus broadening the applicability of the clamp.
[0025] 2. In this invention, the drive motor is activated to rotate the gear two, causing the disc to rotate inside the circular groove, thereby adjusting the angle of the clamping assembly. During the inspection process, the display screen can be precisely rotated to a specific angle as needed, allowing the inspection equipment to scan and inspect all parts of the display screen without blind spots. This eliminates the need to move or reinstall the display screen, simplifying the operation process, saving manpower and time costs, and avoiding damage caused by frequent screen movement. This allows for comprehensive and efficient completion of the inspection work. Attached Figure Description
[0026] Figure 1 This is a three-dimensional schematic diagram of a fixture for testing a liquid crystal display screen according to the present invention;
[0027] Figure 2 This is a schematic diagram of the clamping block of a liquid crystal display screen testing fixture proposed in this utility model;
[0028] Figure 3 This is a schematic diagram of the drive motor of a fixture for testing liquid crystal displays proposed in this utility model;
[0029] Figure 4 This is a schematic diagram of the gear two in a fixture for testing liquid crystal displays proposed in this utility model.
[0030] Legend:
[0031] 1. Workbench; 2. Disc; 3. Clamping block; 4. Limiting block; 5. Connecting block; 6. Slide rod; 7. Support column; 8. Sponge pad; 9. Rotating block; 10. Cylinder; 11. Slider; 12. Fixing plate; 13. Connecting rod; 14. Fixing shaft; 15. Fixing rod; 16. Gear 1; 17. Gear 2; 18. Drive motor; 19. Motor base; 20. Circular groove; 21. Fixing disc. Detailed Implementation
[0032] 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.
[0033] Reference Figure 1 and Figure 2 This utility model provides an embodiment of a fixture for testing liquid crystal displays, including a worktable 1. A support column 7 is fixedly connected to the bottom of the worktable 1 to support it, facilitating operation. A disc 2 is rotatably connected to the center of the worktable 1. A clamping assembly is installed on the outside of the disc 2, and an adjusting assembly is installed inside the disc 2. The clamping assembly includes a fixing plate 12, which is fixedly connected to the outside of the disc 2. A slide rod 6 is fixedly connected inside the fixing plate 12. A connecting block 5 is slidably connected to the outside of the slide rod 6. A clamping block 3 is fixedly connected to the outside of the connecting block 5. A sponge pad 8 is fixedly connected inside the clamping block 3. A cylinder 10 is fixedly connected to the outside of the connecting block 5. When the liquid crystal display needs to be fixed, the cylinder 10 is activated, and its extension and retraction cause the connecting block 5 to slide along the axial direction of the slide rod 6. The slide rod 6 serves as a guide and limiter, ensuring that the connecting block 5 moves smoothly in a predetermined direction, avoiding deviation or shaking. The clamping block 3 moves closer to the liquid crystal display. The clamping block 3 contains a sponge pad 8. When the clamping block 3 contacts the display screen, the sponge pad 8 bears the force first. Using the sponge pad 8 buffers the pressure applied by the clamping block 3, preventing scratches and damage to the surface of the LCD screen; it also makes the clamping effect more stable, ensuring the display screen is firmly fixed in the predetermined position, preventing displacement or loosening during subsequent testing processes, and ensuring accurate and reliable test data. It can adapt to LCD screens of different shapes to a certain extent. The end of the cylinder 10 is fixedly connected to the outside of the fixing plate 12. A fixing shaft 14 is fixedly connected inside the fixing plate 12, and a rotating block 9 is rotatably connected to the outside of the fixing shaft 14. A connecting rod 13 is fixedly connected to the outside of the rotating block 9. During the sliding process of the connecting block 5, it also drives the connecting rod 13 to move. One end of the connecting rod 13 is fixed to the connecting block 5, and the other end is connected to the fixing shaft 14 and the fixing plate 12 through the rotating block 9. This structure makes the clamping block 3 more stable when moving horizontally and can adapt to LCD screens of different shapes to a certain extent. The other end of the connecting rod 13 is fixedly connected to the outside of the connecting block 5. A slider 11 is fixedly connected to the bottom of the connecting block 5, and the slider 11 is slidably connected to the outside of the slide rod 6. Limiting blocks 4 are fixedly connected to both ends of the slide rod 6. The limiting blocks 4 at both ends of the slide rod 6 can effectively prevent the connecting block 5 from sliding out of the range of the slide rod 6 during sliding.
[0034] Reference Figure 1 , Figure 3 and Figure 4 The adjustment assembly includes a motor base 19, which is fixedly connected to the bottom of the worktable 1. A drive motor 18 is fixedly connected inside the motor base 19, and a second gear 17 is fixedly connected to the output end of the drive motor 18. A first gear 16 is rotatably connected to the center of the worktable 1. The second gear 17 meshes with the first gear 16. Starting the drive motor 18 drives the second gear 17 to rotate. When the second gear 17 rotates, it drives the first gear 16 to rotate. Under the action of the fixed rod 15, the first gear 16 then drives the disc 2 to rotate. A fixed disk 21 is fixedly connected to the center of the worktable 1. The first gear 16 is rotatably connected to the outside of the fixed disk 21, providing a support point for rotation. The first gear 16 rotates around the central axis of the fixed disk 21. A fixing rod 15 is fixedly connected inside the gear 16. The fixing rod 15 is fixedly connected inside the disc 2. The connection between the fixing rod 15 and the disc 2 allows the disc 2 to rotate synchronously with the rotation of the gear 16. A circular groove 20 is provided in the middle of the worktable 1. The disc 2 is rotatably connected inside the circular groove 20. The disc 2 rotates smoothly within the circular groove 20, causing the clamping assembly installed on the outside of the disc 2 to rotate accordingly. This enables the adjustment of the LCD screen angle, facilitating the testing of different parts of the LCD screen.
[0035] Working principle: When clamping the LCD screen is required, cylinder 10 retracts. Since the end of cylinder 10 is fixed to the outside of fixed plate 12, and connecting block 5 is fixedly connected to the other end of cylinder 10, connecting block 5 slides on slide rod 6. The movement of connecting block 5 will cause clamping block 3 to move closer to the LCD screen. The sponge pad 8 inside clamping block 3 can act as a buffer to prevent clamping block 3 from damaging the LCD screen, and at the same time, it can better fit the screen surface, making the clamping more stable. Limiting block 4 can prevent connecting block 5 from slipping off slide rod 6. During the sliding process, connecting block 5 will also drive connecting rod 13 to move. One end of connecting rod 13 is fixed to connecting block 5, and the other end is connected to fixed plate 12 via rotating block 9 and fixed shaft 14. This structure makes clamping block 3 more stable when moving in the horizontal direction and can adapt to LCD screens of different shapes to a certain extent.
[0036] The drive motor 18 is activated to rotate gear 17. Gear 17 meshes with gear 16. When gear 17 rotates, it drives gear 16 to rotate, which in turn drives the disc 2 to rotate under the action of the fixed rod 15. The disc 2 is rotatably connected in the circular groove 20 in the middle of the worktable 1. This rotatable connection ensures that the disc 2 can rotate smoothly. By rotating the disc 2, the angle of the clamping assembly can be adjusted, facilitating the inspection of the LCD screen in different directions. The screen can be rotated to a specific angle, allowing the inspection equipment to better inspect various parts of the screen.
[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A fixture for testing liquid crystal displays, comprising a worktable (1), characterized in that: The bottom of the workbench (1) is fixedly connected to a support column (7), and the middle of the workbench (1) is rotatably connected to a disc (2). A clamping assembly is installed on the outside of the disc (2), and an adjustment assembly is installed inside the disc (2). The clamping assembly includes a fixing plate (12), which is fixedly connected to the outside of the disc (2). A slide rod (6) is fixedly connected inside the fixing plate (12). A connecting block (5) is slidably connected to the outside of the slide rod (6). A clamping block (3) is fixedly connected to the outside of the connecting block (5). A sponge pad (8) is fixedly connected inside the clamping block (3). A cylinder (10) is fixedly connected to the outside of the connecting block (5). The end of the cylinder (10) is fixedly connected to the outside of the fixing plate (12).
2. The fixture for testing a liquid crystal display screen according to claim 1, characterized in that: The adjustment assembly includes a motor base (19), which is fixedly connected to the bottom of the workbench (1). A drive motor (18) is fixedly connected inside the motor base (19). A gear two (17) is fixedly connected to the output end of the drive motor (18). A gear one (16) is rotatably connected to the middle of the workbench (1). The gear two (17) meshes with the gear one (16).
3. The fixture for testing a liquid crystal display screen according to claim 1, characterized in that: The fixed plate (12) is fixedly connected to a fixed shaft (14) inside, and a rotating block (9) is rotatably connected to the outside of the fixed shaft (14). A connecting rod (13) is fixedly connected to the outside of the rotating block (9), and the other end of the connecting rod (13) is fixedly connected to the outside of the connecting block (5).
4. The fixture for testing a liquid crystal display screen according to claim 1, characterized in that: The bottom of the connecting block (5) is fixedly connected to a slider (11), which is slidably connected to the outside of the slide rod (6).
5. A fixture for testing a liquid crystal display screen according to claim 1, characterized in that: Limiting blocks (4) are fixedly connected to both ends of the slide rod (6).
6. A fixture for testing a liquid crystal display screen according to claim 2, characterized in that: A fixed disk (21) is fixedly connected to the middle of the workbench (1), and the gear (16) is rotatably connected to the outside of the fixed disk (21).
7. A fixture for testing a liquid crystal display screen according to claim 6, characterized in that: A fixing rod (15) is fixedly connected inside the gear (16), and the fixing rod (15) is fixedly connected inside the disk (2).
8. A fixture for testing a liquid crystal display screen according to claim 2, characterized in that: The workbench (1) has a circular groove (20) in the middle, and the disc (2) is rotatably connected inside the circular groove (20).