A liquid crystal display screen anti-falling detection device

Abstract

The utility model discloses a kind of LCD anti-falling detection devices, including receiving box, receiving box longitudinal one side outer surface is provided with lifting support column, lifting support column longitudinal side surface close to receiving box is slidably connected with U-shaped lifting support plate along vertical direction, first rotating shaft is arranged in U-shaped lifting support plate inside, first rotating motor is arranged on the outer surface of the transverse side of U-shaped lifting support plate, first rotating motor output end is connected with one end of first rotating shaft, the circumferential outer surface of first rotating shaft is provided with L-shaped rotating mounting plate. The utility model has the beneficial effects that: the utility model is stably fixed display screen by vacuum suction mechanism, realizes accurate drop test using linear lifting mechanism;Different size products are adapted by adjustable support structure;With the help of three degrees of freedom adjusting mechanism, longitudinal, transverse and circumferential angle are accurately controlled, effectively simulate a variety of actual falling postures, such as side fall, angle fall, face fall, significantly improve the accuracy and practicality of anti-falling detection.

Description

Technical Field

[0001] This utility model relates to the field of liquid crystal display testing technology, specifically to a liquid crystal display drop resistance testing device. Background Technology

[0002] Liquid crystal displays (LCDs) are flat panel display technologies based on the electro-optic effect of liquid crystal materials. The core principle is to control the alignment of liquid crystal molecules using an electric field, thereby adjusting the transmittance of light emitted by the backlight module to form clear text, images, or videos on the panel. They are widely used in various electronic devices such as mobile phones, computers, televisions, automotive displays, and instruments, becoming one of the most prevalent display solutions in daily life and industrial settings.

[0003] In the factory quality inspection of LCD screens, drop resistance testing is a key step in ensuring product durability. However, the current mainstream testing methods usually only raise the LCD screen to a fixed height and let it fall freely. The drop posture is singular and cannot simulate actual application scenarios, resulting in inaccurate test results. Further development and improvement are needed. Utility Model Content

[0004] The purpose of this invention is to provide a liquid crystal display screen drop test device to solve the problem that the existing drop test methods for liquid crystal displays simply involve raising the liquid crystal display screen to a fixed height and allowing it to fall freely. The drop posture is singular and cannot simulate actual application scenarios, resulting in inaccurate test results.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: A liquid crystal display screen drop-resistant testing device includes a receiving box. A lifting support column is provided on the outer surface of one longitudinal side of the receiving box. A U-shaped lifting support plate is slidably connected to the lifting support column on the side of the receiving box in the vertical direction. A first rotating shaft is provided on the inner side of the U-shaped lifting support plate. A first rotating motor is provided on the outer surface of one transverse side of the U-shaped lifting support plate. The output end of the first rotating motor is connected to one end of the first rotating shaft. An L-shaped rotating mounting plate is provided on the outer circumference of the first rotating shaft. A second rotating shaft is provided on the L-shaped rotating mounting plate in the longitudinal direction. A second rotating motor is provided on the side of the L-shaped rotating mounting plate in the longitudinal direction near the lifting support column. The output end of the rotary motor is connected to one end of the second rotary shaft. A rotary support mounting plate is provided at one end of the second rotary shaft. A third rotary shaft is provided at one end of the rotary support mounting plate. A third rotary motor is provided on one side surface of the rotary support mounting plate. The output end of the third rotary motor is connected to one end of the third rotary shaft. A support mounting plate is provided at one end of the third rotary shaft. Several fixed support plates are equidistantly arranged on the circumferential surface of the support mounting plate. A telescopic support plate is inserted and installed at one end of the fixed support plate. A suction cup is provided at the bottom of one end of the telescopic support plate. A limit bolt is threadedly connected to the top of one end of the fixed support plate. A vacuum pump is provided on the rotary support mounting plate on one side of the third rotary motor. All suction cups are connected to the output end of the vacuum pump.

[0006] Furthermore, a linear transmission mechanism is provided between the lateral surface of the U-shaped lifting support plate and the lateral surface of the lifting support column. The linear transmission mechanism includes a fixed mounting plate on the lateral side of the U-shaped lifting support plate and a transmission rack on the lateral side of the lifting support column. A drive motor is provided on the fixed mounting plate, and a transmission gear is installed at the output end of the drive motor through the fixed mounting plate. The transmission gear meshes with the transmission rack.

[0007] Furthermore, rotary bearings are provided between the first rotary shaft and the U-shaped lifting support plate, between the second rotary shaft and the L-shaped rotary mounting plate, and between the third rotary shaft.

[0008] Furthermore, a cleaning door is provided on the horizontal side of the receiving box, and a detection plate is inserted and installed at the bottom of the vertical side of the receiving box.

[0009] Furthermore, a control device is provided on the outer surface of the receiving box on one side, and a height sensor is installed at the bottom of the support mounting plate. The height sensor, the first rotary motor, the second rotary motor, the third rotary motor, the vacuum pump, and the drive motor in the linear transmission mechanism are all electrically connected to the control device.

[0010] Furthermore, one end of the limiting bolt is provided with an adjustment handle, and the other end extends into the inner side of the fixed support plate and contacts the telescopic support plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are: the utility model has a reasonable design, simple and stable structure, and strong practicality; through the synergistic effect of the vacuum pump and the suction cup at the bottom of the telescopic support plate, it can stably adsorb the liquid crystal display screen, and under the drive of the linear transmission mechanism, it can accurately lift it to the preset height for free fall testing. The operation is simple and the reliability is high, effectively ensuring the repeatability and consistency of the drop test. By adjusting the insertion position of the telescopic support plate within the fixed support plate using limit bolts, rapid adaptation to LCD screens of different sizes and specifications is achieved, significantly improving the versatility and testing efficiency of the device and reducing the complexity of equipment adjustment. By cooperating with the first rotating motor and the first rotating shaft, the vertical tilt angle of the LCD screen can be precisely controlled; the linkage between the second rotating motor and the second rotating shaft can adjust the horizontal tilt angle of the screen; the coordination between the third rotating motor and the third rotating shaft supports the screen to rotate around the axis to change its orientation and position, so that this utility model can simulate a variety of complex drop postures in actual applications (such as side drop, corner drop, face drop, etc.), effectively overcoming the shortcomings of the single drop posture in the prior art, and greatly improving the accuracy and practicality of the drop test results. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of a partial structure of the present invention.

[0013] In the diagram: 1-Receiving box, 2-Lifting support column, 3-U-shaped lifting support plate, 4-First rotating shaft, 5-First rotating motor, 6-L-shaped rotating mounting plate, 7-Second rotating shaft, 8-Second rotating motor, 9-Rotating support mounting plate, 10-Third rotating shaft, 11-Third rotating motor, 12-Support mounting plate, 13-Fixed support plate, 14-Telescopic support plate, 15-Suction cup, 16-Limit bolt, 17-Vacuum pump, 18-Linear transmission mechanism, 19-Detection plate, 20-Control device. Detailed Implementation

[0014] 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.

[0015] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] Combination Figures 1 to 2 The drop-resistant testing device for a liquid crystal display screen includes a receiving box 1. A lifting support column 2 is provided on the outer surface of the receiving box 1 along its longitudinal direction. A U-shaped lifting support plate 3 is slidably connected to the lifting support column 2 along its longitudinal direction near the receiving box 1. A first rotating shaft 4 is provided on the inner side of the U-shaped lifting support plate 3. A first rotating motor 5 is provided on the outer surface of the U-shaped lifting support plate 3 along its transverse direction. The output end of the first rotating motor 5 is connected to one end of the first rotating shaft 4. An L-shaped rotating mounting plate 6 is provided on the outer circumference of the first rotating shaft 4. A second rotating shaft 7 is provided on the L-shaped rotating mounting plate 6 along its longitudinal direction. A second rotating motor 8 is provided on the surface of the L-shaped rotating mounting plate 6 along its longitudinal direction near the lifting support column 2. The output end of the second rotating motor 8 is connected to one end of the second rotating shaft 7. The system is connected as follows: a second rotating shaft 7 is provided with a rotating support mounting plate 9 at one end; a third rotating shaft 10 is provided with a rotating support mounting plate 9 at one end; a third rotating motor 11 is provided on one side surface of the rotating support mounting plate 9; the output end of the third rotating motor 11 is connected to one end of the third rotating shaft 10; a support mounting plate 12 is provided with one end of the third rotating shaft 10; several fixed support plates 13 are equidistantly arranged on the circumferential surface of the support mounting plate 12; a telescopic support plate 14 is inserted and installed at one end of the fixed support plate 13; a suction cup 15 is provided at the bottom of one end of the telescopic support plate 14; a limit bolt 16 is threadedly connected to the top of one end of the fixed support plate 13; a vacuum pump 17 is provided on the rotating support mounting plate 9 on one side of the third rotating motor 11; and the suction cups 15 are all connected to the output end of the vacuum pump 17.

[0017] A linear transmission mechanism 18 is provided between the transverse side surface of the U-shaped lifting support plate 3 and the transverse side surface of the lifting support column 2. The linear transmission mechanism 18 includes a fixed mounting plate on the transverse side of the U-shaped lifting support plate 3 and a transmission rack on the transverse side of the lifting support column 2. A drive motor is mounted on the fixed mounting plate, and a transmission gear is mounted on the output end of the drive motor through the fixed mounting plate. The transmission gear meshes with the transmission rack to ensure the smoothness of the LCD screen lifting process and the accuracy of height control, providing reliable initial height conditions for drop tests. Rotary bearings are provided between the first rotating shaft 4 and the U-shaped lifting support plate 3, between the second rotating shaft 7 and the L-shaped rotating mounting plate 6, and between the third rotating shaft 10. This effectively reduces the frictional resistance and wear between rotating components, ensuring not only the flexibility and smoothness of the rotation of the first rotating shaft 4, the second rotating shaft 7, and the third rotating shaft 10, but also improving the overall angle adjustment. The lifespan and operational reliability of the mechanism are improved; a cleaning door is provided on the horizontal side of the receiving box 1 to facilitate the cleaning of debris and residues after testing, keeping the receiving box 1 clean and avoiding affecting subsequent testing operations; a test plate 19 is inserted and installed at the bottom of the longitudinal side of the receiving box 1 to allow for the replacement of test plates 19 of different materials to simulate different ground scenarios and further improve the accuracy of test results; a control device 20 is provided on the outer surface of the horizontal side of the receiving box 1, and a height sensor is installed at the bottom of the support mounting plate 12. The height sensor, the first rotary motor 5, the second rotary motor 8, the third rotary motor 11, the vacuum pump 17, and the drive motor in the linear transmission mechanism 18 are all electrically connected to the control device 20 to control the working status of each drive component; one end of the limit bolt 16 is provided with an adjustment handle, and the other end extends into the inside of the fixed support plate 13 to contact the telescopic support plate 14 for easy operation and adjustment, improving testing efficiency.

[0018] First, based on the dimensions of the LCD screen to be tested, the extension length of the corresponding telescopic support plate is adjusted by rotating the limiting bolts on each fixed support plate to form a support frame that matches the size of the LCD screen. Then, the LCD screen is placed on the suction cup at the end of the telescopic support plate, and the vacuum pump is started. The negative pressure generated by the suction cup stably adsorbs and fixes the LCD screen.

[0019] When the drive motor of the linear transmission mechanism starts, it drives the U-shaped lifting support plate to rise to the preset height along the lifting support column through the meshing of the transmission gear and the transmission rack. At this time, the height sensor at the bottom of the support mounting plate monitors and feeds back the height data in real time.

[0020] When simulating specific fall postures, the control device can coordinate the operation of the first, second, and third rotary motors: the first rotary motor drives the L-shaped rotating mounting plate to rotate via the first rotating shaft, adjusting the vertical tilt angle of the LCD screen; the second rotary motor drives the rotating support mounting plate to rotate via the second rotating shaft, adjusting the horizontal tilt angle of the LCD screen; and the third rotary motor drives the support mounting plate to rotate via the third rotating shaft, adjusting the circumferential orientation of the LCD screen. Through the combined adjustment of these three degrees of freedom, various actual fall postures such as side falls, corner falls, and face falls can be accurately simulated.

[0021] Once the LCD screen is adjusted to the predetermined height and orientation, the vacuum pump stops working, the suction cup releases its grip, and the LCD screen undergoes free fall under gravity, landing on the detection plate inside the receiving bin, completing one drop test. The drop resistance can be assessed by observing the damage to the LCD screen. After the test, debris can be cleaned from the receiving bin through the cleaning door, and the detection plate can be replaced with one made of different materials to simulate different drop contact surfaces.

[0022] 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.

[0023] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A liquid crystal display screen drop resistance testing device, comprising a receiving box (1), characterized in that: A lifting support column (2) is provided on the outer surface of the receiving box (1) on one longitudinal side. A U-shaped lifting support plate (3) is slidably connected to the surface of the lifting support column (2) on the longitudinal side near the receiving box (1) in the vertical direction. A first rotating shaft (4) is provided on the inner side of the U-shaped lifting support plate (3). A first rotating motor (5) is provided on the outer surface of the U-shaped lifting support plate (3) on one transverse side. The output end of the first rotating motor (5) is connected to one end of the first rotating shaft (4). An L-shaped rotating mounting plate (6) is provided on the outer circumference of the first rotating shaft (4). A second rotating shaft (7) is provided on the L-shaped rotating mounting plate (6) on the longitudinal side. A second rotating motor (8) is provided on the surface of the L-shaped rotating mounting plate (6) on the longitudinal side near the lifting support column (2). The output end of the second rotating motor (8) is connected to one end of the second rotating shaft (7). One end of the second rotating shaft (7) is provided with A rotating support mounting plate (9) is provided. A third rotating shaft (10) is provided at one end of the rotating support mounting plate (9). A third rotating motor (11) is provided on one side surface of the rotating support mounting plate (9). The output end of the third rotating motor (11) is connected to one end of the third rotating shaft (10). A support mounting plate (12) is provided at one end of the third rotating shaft (10). Several fixed support plates (13) are equidistantly arranged on the circumferential surface of the support mounting plate (12). A telescopic support plate (14) is inserted and installed at one end of the fixed support plate (13). A suction cup (15) is provided at the bottom of one end of the telescopic support plate (14). A limit bolt (16) is threadedly connected to the top of one end of the fixed support plate (13). A vacuum pump (17) is provided on one side of the rotating support mounting plate (9) located on the third rotating motor (11). All suction cups (15) are connected to the output end of the vacuum pump (17).

2. The liquid crystal display screen drop resistance testing device according to claim 1, characterized in that: A linear transmission mechanism (18) is provided between the lateral side surface of the U-shaped lifting support plate (3) and the lateral side surface of the lifting support column (2). The linear transmission mechanism (18) includes a fixed mounting plate provided on the lateral side of the U-shaped lifting support plate (3) and a transmission rack provided on the lateral side of the lifting support column (2). A drive motor is provided on the fixed mounting plate, and a transmission gear is installed through the fixed mounting plate at the output end of the drive motor. The transmission gear meshes with the transmission rack.

3. The liquid crystal display screen drop resistance testing device according to claim 1, characterized in that: Rotary bearings are provided between the first rotating shaft (4) and the U-shaped lifting support plate (3), between the second rotating shaft (7) and the L-shaped rotating mounting plate (6), and between the third rotating shaft (10).

4. The liquid crystal display screen drop resistance testing device according to claim 1, characterized in that: The receiving box (1) has a cleaning door on one side in the horizontal direction, and a detection plate (19) is inserted and installed at the bottom of the receiving box (1) in the vertical direction.

5. The liquid crystal display screen drop resistance testing device according to claim 2, characterized in that: A control device (20) is provided on the outer surface of the receiving box (1) on one side. A height sensor is installed at the bottom of the support mounting plate (12). The height sensor, the first rotary motor (5), the second rotary motor (8), the third rotary motor (11), the vacuum pump (17), and the drive motor in the linear transmission mechanism (18) are all electrically connected to the control device (20).

6. The liquid crystal display screen drop resistance testing device according to claim 1, characterized in that: One end of the limiting bolt (16) is provided with an adjustment handle, and the other end extends into the inside of the fixed support plate (13) and contacts the telescopic support plate (14).

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