An impact resistance test device for an LED display screen

Abstract

The present invention discloses an impact resistance test device for an LED display screen, which includes a supporting bottom plate. A protective frame is arranged on the upper part of the supporting bottom plate. A supporting column is arranged on the top of the supporting bottom plate on the longitudinal side of the protective frame. Entrances and exits are provided on both transverse sides of the protective frame. Two mutually parallel slide rails are arranged on the top of the supporting bottom plate inside the entrances and exits. At least two supporting and limiting components slide along the transverse direction between the slide rails. A control device is arranged on the outer surface of the longitudinal side of the protective frame far from the supporting column. A test component is slidably connected to the supporting column along the vertical direction. The beneficial effects of the present invention are as follows: The present invention is reasonably designed, with a simple and stable overall structure and strong practicability. It can not only capture and monitor the magnitude of the impact force suffered by the display screen when it is impacted, but also conduct impact resistance tests on the display screen at different positions and different angles. Moreover, it can predict the impact position of the test ball on the display screen and control the magnitude of the impact force that the test ball can generate.

Description

Technical Field

[0001] The present invention relates to the technical field of anti - impact testing for display screens, and particularly to an anti - impact testing device for an LED display screen. Background Art

[0002] An LED display screen is a display device made using light - emitting diode (LED) technology, which has the advantages of high brightness, low energy consumption, long lifespan, etc. By arranging a large number of LED beads in a matrix, it can display various contents such as text, images, videos, etc. At the same time, the display effect is bright and clear, and it can automatically adjust the brightness according to the ambient light, making it an ideal choice for modern digital information display. The anti - impact performance of an LED display screen is one of its important performance indicators to ensure that it can withstand certain external physical impacts during transportation, installation, and use without being easily damaged. Therefore, before the LED display screen leaves the factory, it needs to be sampled and tested to ensure the stability of product quality.

[0003] Chinese Patent CN221173814U discloses an anti - impact detection device for electronic display screen production. It drives an upper pressure plate and an upper punching head to run on a sliding seat and a sliding rail through a cylinder via a T - shaped plate, uses the upper pressure plate to impact the electronic display screen on the limit groove seat at the fastest speed, and then observes the degree of fragmentation of the impacted electronic display screen to determine the magnitude of the anti - impact force of the electronic display screen. A pressure gauge is provided on the filter air valve to observe the pressure value entering the cylinder.

[0004] In the above - mentioned patent, the test method of using a cylinder to drive the upper pressure plate to impact the display screen on the limit groove seat at the fastest speed to determine the magnitude of the anti - impact force of the electronic display screen is easily affected by air pressure fluctuations. Especially when the cylinder starts or stops quickly, this instantaneous fluctuation will affect the acceleration of the upper pressure plate. The display screen may receive impact forces of different magnitudes at different time points, and these changes are usually not easily controlled precisely. At the same time, it is impossible to perform impact tests on different positions and different angles of the display screen, affecting the accuracy of the test results, and further development and improvement are needed. Summary of the Invention

[0005] The purpose of the present invention is to provide an anti - impact testing device for an LED display screen to solve the problems that the existing anti - impact testing device for an LED display screen is inconvenient to control the impact force on the display screen, and at the same time, it is impossible to perform impact tests on different positions and different angles of the display screen, resulting in inaccurate test results.

[0006] The present invention realizes the above object through the following technical solutions: An impact resistance test device for an LED display screen, comprising a support bottom plate, a protective frame is arranged on the upper part of the support bottom plate, a support column is arranged on the top of the support bottom plate on the longitudinal side of the protective frame, access openings are provided on both transverse sides of the protective frame, two parallel slide rails are arranged on the top of the support bottom plate inside the access openings, at least two support and limit components are slidably arranged between the slide rails along the transverse direction, a control device is arranged on the outer surface of the longitudinal side of the protective frame away from the support column, a test component is slidably connected to the support column along the vertical direction, and linear transmission mechanisms are arranged between the support and limit components and the support bottom plate and between the test component and the support column respectively.

[0007] Further, the support and limit component includes a moving support plate, sliders are arranged at the positions corresponding to the slide rails at the bottom of the moving support plate, the sliders are slidably connected to the slide rails, a linear transmission mechanism is arranged between one end of the top of the moving support plate and the support bottom plate, an electric turntable is arranged on the top of the moving support plate, two support plug-in plates are arranged equidistantly along the circumferential direction on the top of the electric turntable, a first pressure sensor is arranged at the center of the top of the electric turntable, lifting plug-in plates are vertically inserted and installed on the support plug-in plates, a first support connecting plate is arranged between the inner bottom ends of the lifting plug-in plates, a first pressing plate is arranged at the position corresponding to the first pressure sensor at the bottom of the first support connecting plate, the bottom of the first pressing plate is in contact with the first pressure sensor, first rotating shafts are arranged at the ends of the lifting plug-in plates away from the support plug-in plates, rotating support mounting disks are arranged at the positions corresponding to the first rotating shafts inside the lifting plug-in plates, a first rotating motor is arranged on the outside of the lifting plug-in plate at one end of the first support connecting plate, one side of the rotating support mounting disk is connected to the first rotating shaft, and a U-shaped limit bearing plate is installed on the other side, the output end of the first rotating motor is connected to one end of the first rotating shaft, a second support connecting plate is arranged between the U-shaped limit bearing plates, a limit pressing plate is arranged inside the U-shaped limit bearing plates, and first lifting devices are arranged at both ends of the top of the U-shaped limit bearing plates, and the output ends of the bottoms of the first lifting devices extend into the inside of the U-shaped limit bearing plates and are connected to the tops of the limit pressing plates.

[0008] Further, the test component includes a U-shaped sliding mounting seat. The inner surfaces of the two lateral sides of the U-shaped sliding mounting seat are respectively slidably connected to the outer surfaces of the two lateral sides of the support column in the vertical direction. A linear transmission mechanism is provided between one longitudinal side surface of the U-shaped sliding mounting seat and one longitudinal side surface of the support column. A support socket is provided on the outer surface of one lateral side of the U-shaped sliding mounting seat. A movable mounting plate is inserted into the support socket. A telescopic device is provided on the outer surface of the U-shaped sliding mounting seat below the support socket. A support connection block is installed at the output end of the telescopic device. The top of the support connection block is connected to the bottom of the movable mounting plate. A second lifting device is provided at the top of one end of the movable mounting plate close to the support limiting component. The bottom output end of the second lifting device passes through the movable mounting plate and is installed with a lifting support plate. A first guiding insertion rod is provided at one end of the top of the lifting support plate away from the second lifting device. The first guiding insertion rod is inserted and connected to the movable mounting plate. A support insertion rod is inserted and installed between the second lifting device and the first guiding insertion rod on the lifting support plate. A second pressing plate is installed at one end of the support insertion rod above the lifting support plate. A material suction block is installed at one end of the support insertion rod below the lifting support plate. A second guiding insertion rod is provided at one end of the bottom of the second pressing plate. The second guiding insertion rod is inserted and connected to the lifting support plate. A second pressure sensor is provided between the support insertion rod and the second guiding insertion rod on the top of the lifting support plate. A height sensor is provided on the outer surface of one longitudinal side of the lifting support plate. A support mounting ring is provided on the outer circumferential surface of the material suction block. The bottom of the material suction block has an adsorption groove with a curved surface. A first electromagnet is provided on the inner surface of the adsorption groove. A number of infrared positioning lights are equidistantly arranged on the bottom circumference of the support mounting ring. A fixed mounting plate is provided on the outer surface of one longitudinal side of the U-shaped sliding mounting seat close to the support limiting component. A second rotating shaft is provided on the fixed mounting plate. A storage plate is inclined downward corresponding to the position of the second rotating shaft below the material suction block. The higher end of the storage plate is connected to the bottom end of the second rotating shaft. A second rotating motor is provided on the top of the fixed mounting plate. The output end of the second rotating motor is connected to the top end of the second rotating shaft. The top of the storage plate has a storage groove. A second electromagnet is provided on the inner surface of the bottom of the storage groove.

[0009] Further, on the outer surfaces of the two lateral sides of the protective frame corresponding to the entrance and exit, protective doors are slidably connected in the vertical direction. A third lifting device is provided between the protective doors and the protective frame.

[0010] Further, the linear transmission mechanism includes a driving motor. A transmission gear is installed on the driving motor. The transmission gear is meshed and connected with a transmission rack.

[0011] Further, linear bushings are provided at the positions of the lifting support plate corresponding to the first guiding and plugging rod and the second pressing plate corresponding to the second guiding and plugging rod.

[0012] Further, the drive motors in the electric turntable, the first pressure sensor, the first rotating motor, the first lifting device, the telescopic device, the second lifting device, the second pressure sensor, the height sensor, the first electromagnet, the infrared positioning lamp, the second rotating motor, the second electromagnet, the third lifting device, and the linear transmission mechanism are all electrically connected to the control device.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. The present invention is reasonably designed, with a simple and stable overall structure and strong practicability. It can not only capture and monitor the impact force borne by the display screen when it is impacted, but also perform impact resistance tests on the display screen at different positions and angles. Moreover, it can predict the impact position of the test ball on the display screen and control the impact force generated by the test ball, so as to improve the accuracy of the test results. In addition, it can also automatically load and replenish the test ball, improve the test efficiency, and is suitable for batch testing of display screens.

[0015] 2. Specifically, in the support and limit assembly, the structure formed by the cooperation of the support plugging plate, the lifting plugging plate, the first support connecting plate, and the first pressing plate enables the first pressure sensor to capture and monitor the impact force borne by the display screen when it is impacted. The first lifting device drives the limit pressing plate to press against the display screen to fix and limit the display screen, ensuring the stability of its position during the test and preventing it from being easily displaced and affecting the accuracy of the test results. The multiple support and limit assemblies can also be applied to batch testing of display screens. When one support and limit assembly drives a display screen to be tested in the protection frame, the disassembly and assembly operations of the display screen can be carried out on another support and limit assembly, improving the test efficiency. The linear transmission mechanism can adjust the position of the support and limit assembly fixedly installed with the display screen at different positions in the protection frame. Combined with the electric turntable, it can drive the display screen installed between the U-shaped limit bearing plates to rotate to different directions, enabling impact resistance tests on different positions of the display screen. The cooperation of the rotating support mounting disc, the first rotating motor, the first rotating shaft, and the second support connecting plate can drive the U-shaped limit bearing plate to rotate and adjust the inclination angle of the display screen fixedly clamped between the U-shaped limit bearing plates, so as to perform impact resistance tests on the display screen at different angles.

[0016] 3. Specifically, the test component can store multiple test balls through the storage grooves on the set storage plate. With the cooperation of the second rotation motor, the telescopic device, and the second lifting device, the test balls can be automatically replenished and filled to the bottom of the first electromagnet and adsorbed by it. There is no need to manually replenish and fill the test balls after each single test by lowering the test component. This improves the continuity of the test use and thus greatly improves the test efficiency. Among them, the set second electromagnet can act on the test balls to adsorb them, ensuring the stability of the relative positions of the test balls during the rising and rotating processes of the storage plate, preventing them from easily slipping out of the storage grooves, and improving the safety of use. At the same time, through the cooperation of the set second pressure sensor and height sensor, the weight and height of the test balls can be monitored, and then the impact force that can be generated by their free fall can be calculated, so as to control the size of the impact force generated by the test balls by adjusting the height of the test balls. In addition, through the set support mounting ring and infrared positioning lamp, the impact position of the test balls on the display screen can be predicted, and thus the specific position of the impact resistance test of the display screen can be accurately set, further improving the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 is a three-dimensional structural diagram of the support and limit component in the present invention;

[0019] Figure 3 is the front view of the support and limit component in the present invention;

[0020] Figure 4 is Figure 2 the enlarged view of part A in

[0021] Figure 5 is a three-dimensional structural diagram of the test component in the present invention;

[0022] Figure 6 is the left view of the test component in the present invention;

[0023] Figure 7 is Figure 6 the enlarged view of part B in

[0024] Figure 8 is a cross-sectional structural diagram of the material suction block in the present invention.

[0025] In the figure: 1 - support bottom plate, 2 - protective frame, 3 - support column, 4 - entrance and exit, 5 - slide rail, 6 - support and limit component, 7 - control device, 8 - test component, 9 - linear transmission mechanism;

[0026] 601 - Moving support plate, 602 - Electric turntable, 603 - Support plug-in plate, 604 - First pressure sensor, 605 - Lifting plug-in plate, 606 - First support connecting plate, 607 - First pressure plate, 608 - First rotating shaft, 609 - Rotating support mounting disc, 610 - First rotating motor, 611 - U-shaped limit bearing plate, 612 - Second support connecting plate, 613 - Limit pressure plate, 614 - First lifting device;

[0027] 801 - U-shaped sliding mounting seat, 802 - Support plug-in seat, 803 - Moving mounting plate, 804 - Telescopic device, 805 - Second lifting device, 806 - Lifting support plate, 807 - First guiding plug-in rod, 808 - Support plug-in rod, 809 - Second pressure plate, 810 - Suction block, 811 - Second guiding plug-in rod, 812 - Second pressure sensor, 813 - Height sensor, 814 - Support mounting ring, 815 - First electromagnet, 816 - Infrared positioning lamp, 817 - Fixed mounting plate, 818 - Storage plate, 819 - Second rotating motor, 820 - Storage tank, 821 - Second electromagnet. Detailed implementation manners

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0030] Combined with Figures 1 to 8An impact resistance test device for an LED display screen as shown includes a support bottom plate 1. A protective frame 2 is arranged on the upper part of the support bottom plate 1. A support column 3 is arranged at the top of the support bottom plate 1 on the longitudinal side of the protective frame 2. Entrance and exit openings 4 are provided on both transverse sides of the protective frame 2. Two parallel slide rails 5 are arranged at the top of the support bottom plate 1 inside the entrance and exit openings 4. At least two support and limit assemblies 6 slide along the transverse direction between the slide rails 5. A control device 7 is arranged on the outer surface of the longitudinal side of the protective frame 2 away from the support column 3. A test assembly 8 is slidably connected to the support column 3 along the vertical direction. A linear transmission mechanism 9 is arranged between the support and limit assembly 6 and the support bottom plate 1 and between the test assembly 8 and the support column 3 respectively.

[0031] The support and limit assembly 6 includes a movable support plate 601. At the bottom of the movable support plate 601, sliders are provided corresponding to the positions of the slide rails 5, and the sliders are slidably connected to the slide rails 5. A linear transmission mechanism 9 is provided between one end of the top of the movable support plate 601 and the support bottom plate 1. An electric turntable 602 is provided on the top of the movable support plate 601. Two support plug-in plates 603 are equidistantly arranged along the circumferential direction on the top of the electric turntable 602. A first pressure sensor 604 is provided at the center of the top of the electric turntable 602. Lifting plug-in plates 605 are vertically plugged and installed on the support plug-in plates 603. A first support connecting plate 606 is provided between the inner bottom ends of the lifting plug-in plates 605. A first pressing plate 607 is provided at the position corresponding to the first pressure sensor 604 at the bottom of the first support connecting plate 606. The bottom of the first pressing plate 607 is in contact with the first pressure sensor 604. A first rotating shaft 608 is provided at one end of the lifting plug-in plate 605 away from the support plug-in plate 603. Rotating support mounting disks 609 are provided at the positions corresponding to the first rotating shafts 608 on the inner sides of the lifting plug-in plates 605. A first rotating motor 610 is provided on the outer side of the lifting plug-in plate 605 at one end of the first support connecting plate 606. One side of the rotating support mounting disk 609 is connected to the first rotating shaft 608, and a U-shaped limit bearing plate 611 is installed on the other side. The output end of the first rotating motor 610 is connected to one end of the first rotating shaft 608. A second support connecting plate 612 is provided between the U-shaped limit bearing plates 611. A limit pressing plate 613 is provided on the inner side of the U-shaped limit bearing plate 611. First lifting devices 614 are provided at both ends of the top of the U-shaped limit bearing plate 611. The bottom output ends of the first lifting devices 614 extend into the inner side of the U-shaped limit bearing plate 611 and are connected to the top of the limit pressing plate 613; through the structure of the support plug-in plate 603, the lifting plug-in plate 605, the first support connecting plate 606, and the first pressing plate 607 in cooperation, the first pressure sensor 604 can capture and monitor the magnitude of the impact force borne by the display screen when it is impacted; the display screen to be tested is placed between the inner surface of the bottom of the U-shaped limit bearing plate 611 and the limit pressing plate 613, and the limit pressing plate 613 is driven by the first lifting device 614 to press against the display screen to achieve fixed limit of the display screen and ensure the stability of its position during the test process, avoiding its easy displacement and affecting the accuracy of the test results; through the linear transmission mechanism 9 provided, the whole support and limit assembly 6 can move linearly horizontally along the support bottom plate 1, which can not only drive the support and limit assembly 6 fixedly installed with the display screen to enter and exit the protection frame 2 through the entrance and exit 4, but also, combined with the multiple support and limit assemblies 6 provided, can be applicable to batch testing of display screens. When one support and limit assembly 6 drives one display screen to be tested in the protection frame 2, the disassembly and assembly operations of the display screen can be carried out on another support and limit assembly 6, improving the test efficiency;The provided linear drive mechanism 9 can adjust the support and limit assembly 6 with the display screen fixedly installed at different positions within the protective frame 2. Combining with the provided electric turntable 602, it can drive the display screen installed between the U-shaped limit bearing plates 611 to rotate to different directions, so as to realize the anti-impact test on different positions of the display screen. Through the cooperation of the provided rotary support mounting disc 609, the first rotary motor 610, the first rotary shaft 608 and the second support connecting plate 612, the U-shaped limit bearing plate 611 can be driven to rotate, and the tilt angle of the display screen fixedly clamped between the U-shaped limit bearing plates 611 can be adjusted, so as to realize the anti-impact test on the display screen at different angles.

[0032] The test component 8 includes a U-shaped sliding mounting seat 801. The inner surfaces of the two lateral sides of the U-shaped sliding mounting seat 801 are respectively in sliding connection with the outer surfaces of the two lateral sides of the support column 3 in the vertical direction. A linear transmission mechanism 9 is provided between one surface in the longitudinal direction of the U-shaped sliding mounting seat 801 and one surface in the longitudinal direction of the support column 3. A support socket 802 is provided on the outer surface of one lateral side of the U-shaped sliding mounting seat 801. A movable mounting plate 803 is inserted and mounted on the support socket 802. A telescopic device 804 is provided on the outer surface of the U-shaped sliding mounting seat 801 below the support socket 802. A support connection block is mounted at the output end of the telescopic device 804. The top of the support connection block is connected to the bottom of the movable mounting plate 803. A second lifting device 805 is provided at the top of one end of the movable mounting plate 803 close to the support limiting component 6. The output end of the bottom of the second lifting device 805 passes through the movable mounting plate 803 and is provided with a lifting support plate 806. A first guiding plugging rod 807 is provided at one end of the top of the lifting support plate 806 away from the second lifting device 805. The first guiding plugging rod 807 is in plugging connection with the movable mounting plate 803. A support plugging rod 808 is inserted and mounted between the second lifting device 805 and the first guiding plugging rod 807 on the lifting support plate 806. A second pressing plate 809 is mounted at one end of the top of the support plugging rod 808 above the lifting support plate 806. A material suction block 810 is mounted at one end of the bottom of the support plugging rod 808 below the lifting support plate 806. A second guiding plugging rod 811 is provided at one end of the bottom of the second pressing plate 809. The second guiding plugging rod 811 is in plugging connection with the lifting support plate 806. A second pressure sensor 812 is provided between the support plugging rod 808 and the second guiding plugging rod 811 on the top of the lifting support plate 806. A height sensor 813 is provided on the outer surface of one side in the longitudinal direction of the lifting support plate 806. A support mounting ring 814 is provided on the circumferential outer surface of the material suction block 810. The bottom of the material suction block 810 has an adsorption groove with a curved surface. A first electromagnet 815 is provided on the inner surface of the adsorption groove. A plurality of infrared positioning lights 816 are equidistantly provided on the bottom circumference of the support mounting ring 814. A fixed mounting plate 817 is provided on the outer surface of one side in the longitudinal direction of the U-shaped sliding mounting seat 801 close to the support limiting component 6. A second rotating shaft is provided on the fixed mounting plate 817. A storage plate 818 is obliquely downward provided at a position corresponding to the second rotating shaft below the material suction block 810. The higher end of the position of the storage plate 818 is connected to the bottom end of the second rotating shaft. A second rotating motor 819 is provided on the top of the fixed mounting plate 817. The output end of the second rotating motor 819 is connected to the top end of the second rotating shaft. The top of the storage plate 818 has a storage groove 820. A second electromagnet 821 is provided on the inner surface of the bottom of the storage groove 820. The inner surface of the bottom of the storage groove 820 and the top of the second electromagnet 821 are both obliquely arranged;The storage groove 820 on the set storage plate 818 can be used to store multiple test balls. The material of the test balls is selected as a metal that can be adsorbed by a magnet, so that the second electromagnet 821 can act on the test balls to adsorb them, ensuring the stability of the relative positions of the test balls during the rising and rotating processes of the storage plate 818, avoiding their easy slipping from the storage groove 820, and improving the safety of use; with the cooperation of the set second rotating motor 819 and the second rotating shaft, the storage plate 818 is driven to rotate. At the same time, the telescopic device 804 is set to drive the moving mounting plate 803 to move, enabling the test balls at the end of the storage groove 820 far from the support column to be directly below the first electromagnet 815 at the bottom of the suction block 810. The second lifting device 805 is set to drive the suction block 810 to descend, allowing the first electromagnet 815 to adsorb the test balls and then drive them to rise. At this time, the second rotating motor 819, in cooperation with the second rotating shaft, drives the storage plate 818 to rotate, making it move away from the moving mounting plate 803. Then, the second electromagnet 821 is controlled to stop working, so that the test balls in the storage groove 820 will roll along the top of the second electromagnet 821 towards the lower end, replacing the position of the test balls adsorbed and driven, for use in the next adsorption by the first electromagnet 815, realizing the automatic replenishment and filling of the test balls. There is no need for the moving mounting plate 803 to descend after a single test and manually replenish and fill the test balls by hand, improving the continuity of the test use, and thus greatly improving the test efficiency; at the same time, with the cooperation of the set second pressure sensor 812 and height sensor 813, the weight and height of the test balls can be monitored, and then the impact force that can be generated by their free fall can be calculated, so as to control the magnitude of the impact force generated by the test balls by adjusting the height of the test balls; in addition, with the set support mounting ring 814 and infrared positioning lamp 816, the impact position of the test balls on the display screen can be predicted, and thus the specific position of the anti-impact test of the display screen can be accurately set, further improving the accuracy of the test results.;

[0033] On the outer surfaces of the two lateral sides of the protection frame 2 corresponding to the entrance and exit 4, protection doors are slidably connected vertically. A third lifting device is provided between the protection doors and the protection frame 2 to prevent the test ball from escaping from the protection frame 2 through the entrance and exit 4, further improving the safety of use. The linear transmission mechanism 9 includes a driving motor. The driving motor is equipped with a transmission gear, and the transmission gear is meshed with a transmission rack to drive the support and limit assembly 6 to move linearly horizontally and drive the test assembly 8 to move linearly vertically. The driving motor is a servo motor with a brake, which is convenient for improving the accuracy of the moving position and the stability of the positions of the support and limit assembly 6 and the test assembly 8 after stopping work. Linear bushings are provided at the positions of the lifting support plate 806 corresponding to the first guiding and inserting rod 807 and the second pressing plate 809 corresponding to the second guiding and inserting rod 811, so as to facilitate the smooth lifting of the first guiding and inserting rod 807 and the second guiding and inserting rod 811 and improve their service life. The electric turntable 602, the first pressure sensor 604, the first rotating motor 610, the first lifting device 614, the telescopic device 804, the second lifting device 805, the second pressure sensor 812, the height sensor 813, the first electromagnet 815, the infrared positioning lamp 816, the second rotating motor 819, the second electromagnet 821, the third lifting device and the driving motor in the linear transmission mechanism 9 are all electrically connected to the control device 7 to receive the signals transmitted by the first pressure sensor 604, the second pressure sensor 812 and the height sensor 813, and control the working states of the electric turntable 602, the first rotating motor 610, the first lifting device 614, the telescopic device 804, the second lifting device 805, the first electromagnet 815, the infrared positioning lamp 816, the second rotating motor 819, the second electromagnet 821, the third lifting device and the driving motor in the linear transmission mechanism 9 respectively. The first rotating motor 610 and the second rotating motor 819 also select servo motors with brakes, and the first lifting device 614, the telescopic device 804, the second lifting device 805 and the third lifting device are one of cylinders or servo electric cylinders, which are selected according to actual use requirements.

[0034] During use, place the display screen to be tested between the U-shaped limit bearing plates, and then control the first lifting device to drive the limit pressing plate to descend to fix and limit the display screen. Then, control the linear transmission mechanism to drive the moving support plate to move, so that the support and limit assembly installed with the display screen enters the protection frame as a whole. Then, continue to control the linear transmission mechanism to drive the movement of the moving installation to adjust the horizontal position of the display screen. Then, control the electric turntable to drive the display screen to rotate to adjust its direction. Then, control the first rotating motor to drive the rotating support mounting plate to rotate to adjust the tilt angle of the display screen, that is, complete the position adjustment and fixed limit operation of the display screen.

[0035] Then, control the linear drive mechanism on the support column to drive the test assembly to descend. According to the test requirements, place several test balls in the storage tank. Control the second electromagnet to start working to adsorb and limit the test balls. Under the cooperation of the second rotary motor and the second rotary shaft, drive the storage plate to rotate. At the same time, drive the movable mounting plate to move through the set telescopic device, so that the test balls at the end of the storage tank far from the support column are directly below the first electromagnet at the bottom of the suction block. Drive the suction block to descend through the set second lifting device. At the same time, control the second electromagnet to stop working and control the first electromagnet to start working. Adsorb the test balls through the first electromagnet, and then control the second lifting device to drive it to rise. The test balls in the storage tank will roll along the top of the second electromagnet to the lower end to replace the position of the test balls adsorbed and driven, so as to be used for the next adsorption by the first electromagnet. Then, control the second electromagnet to start working again. Under the cooperation of the second rotary motor and the second rotary shaft, drive the storage plate to rotate to make it away from the movable mounting plate, that is, complete the automatic loading and replenishment of the test balls.

[0036] After the first electromagnet adsorbs the test balls, under the conduction of the support insertion rod and the second pressure plate, the second pressure sensor will monitor the weight change of the suction block. The control device will calculate the weight of the test balls. Then, according to the required impact force size set for the test, with the cooperation of the height sensor, drive the test assembly to rise and fall to the specified height through the linear transmission mechanism, so as to control the impact force size generated by the test balls by adjusting the height of the test balls. Then, combined with the infrared positioning lamp set at the bottom of the support mounting ring, predict the impact position of the test balls on the display screen. Then, control the first electromagnet to stop working, so that the test balls do free fall motion to conduct an impact test on the display screen.

[0037] By repeating the above steps of adjusting the position, direction and angle of the display screen and the automatic loading and replenishment of the test balls, it can be used for the impact resistance test of different positions and different angles of the display screen. It can also control the linear transmission mechanism to send out the tested display screen from the protection frame and send in a new display screen to continue the test operation according to the above steps.

[0038] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0039] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard 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. An impact resistance test device for an LED display screen, comprising a support bottom plate (1), wherein a protective frame (2) is arranged on the upper part of the support bottom plate (1), and it is characterized in that: At the top of the support base plate (1), a support column (3) is arranged on the longitudinal side of the protective frame (2). Entrance and exit openings (4) are provided on both lateral sides of the protective frame (2). At the top of the support base plate (1) and inside the entrance and exit openings (4), two mutually parallel slide rails (5) are arranged. At least two support and limit assemblies (6) slide along the lateral direction between the slide rails (5). A control device (7) is arranged on the outer surface of the longitudinal side of the protective frame (2) away from the support column (3). A test assembly (8) is slidably connected to the support column (3) in the vertical direction. A linear transmission mechanism (9) is arranged between the support and limit assembly (6) and the support base plate (1), and between the test assembly (8) and the support column (3); The support and limit assembly (6) includes a movable support plate (601). At the position corresponding to the slide rail (5) at the bottom of the movable support plate (601), a slider is provided, and the slider is slidably connected to the slide rail (5). A linear transmission mechanism (9) is arranged between one end of the top of the movable support plate (601) and the support base plate (1). An electric rotary table (602) is arranged on the top of the movable support plate (601). Two support plug-in plates (603) are equidistantly arranged along the circumferential direction on the top of the electric rotary table (602). A first pressure sensor (604) is arranged at the center of the top of the electric rotary table (602). Lift plug-in plates (605) are vertically plugged and installed on the support plug-in plates (603). A first support connecting plate (606) is arranged between the inner bottom ends of the lift plug-in plates (605). At the position corresponding to the first pressure sensor (604) at the bottom of the first support connecting plate (606), a first pressure plate (607) is provided. The bottom of the first pressure plate (607) is in contact with the first pressure sensor (604). First rotating shafts (608) are arranged at the ends of the lift plug-in plates (605) away from the support plug-in plates (603). Rotating support mounting discs (609) are arranged at the positions corresponding to the first rotating shafts (608) inside the lift plug-in plates (605). A first rotating motor (610) is arranged on the outside of the lift plug-in plate (605) at one end of the first support connecting plate (606). One side of the rotating support mounting disc (609) is connected to the first rotating shaft, and a U-shaped limit bearing plate (611) is installed on the other side. The output end of the first rotating motor (610) is connected to one end of the first rotating shaft. A second support connecting plate (612) is arranged between the U-shaped limit bearing plates (611). A limit pressure plate (613) is arranged inside the U-shaped limit bearing plates (611). First lifting devices (614) are arranged at both ends of the top of the U-shaped limit bearing plates (611). The bottom output ends of the first lifting devices (614) extend into the inside of the U-shaped limit bearing plates (611) and are connected to the top of the limit pressure plate (613); The test component (8) includes a U-shaped sliding mounting seat (801). The inner surfaces of the two lateral sides of the U-shaped sliding mounting seat (801) are slidably connected to the outer surfaces of the two lateral sides of the support column (3) in the vertical direction. A linear transmission mechanism (9) is provided between one longitudinal side surface of the U-shaped sliding mounting seat (801) and one longitudinal side surface of the support column (3). A support plugging seat (802) is provided on the outer surface of one lateral side of the U-shaped sliding mounting seat (801). A movable mounting plate (803) is plugged and installed in the support plugging seat (802). A telescopic device (804) is provided on the outer surface of the U-shaped sliding mounting seat (801) below the support plugging seat (802). A support connection block is installed at the output end of the telescopic device (804). The top of the support connection block is connected to the bottom of the movable mounting plate (803). A second lifting device (805) is provided at the top of one end of the movable mounting plate (803) close to the support limiting component (6). The bottom output end of the second lifting device (805) passes through the movable mounting plate (803) and is installed with a lifting support plate (806). A first guiding plugging rod (807) is provided at one end of the top of the lifting support plate (806) away from the second lifting device (805). The first guiding plugging rod (807) is plugged and connected to the movable mounting plate (803). A support plugging rod (808) is plugged and installed between the second lifting device (805) and the first guiding plugging rod (807) on the lifting support plate (806). A second pressing plate (809) is installed at one end of the support plugging rod (808) above the lifting support plate (806). A material suction block (810) is installed at one end of the support plugging rod (808) below the lifting support plate (806). A second guiding plugging rod (811) is provided at one end of the bottom of the second pressing plate (809). The second guiding plugging rod (811) is plugged and connected to the lifting support plate (806). A second pressure sensor (812) is provided between the support plugging rod (808) and the second guiding plugging rod (811) on the top of the lifting support plate (806). A height sensor (813) is provided on the outer surface of one longitudinal side of the lifting support plate (806). A support mounting ring (814) is provided on the circumferential outer surface of the material suction block (810). The bottom of the material suction block (810) has an adsorption groove with a curved surface. A first electromagnet (815) is provided on the inner surface of the adsorption groove. A plurality of infrared positioning lights (816) are equidistantly arranged on the bottom circumference of the support mounting ring (814). A fixed mounting plate (817) is provided on the outer surface of one longitudinal side of the U-shaped sliding mounting seat (801) close to the support limiting component (6). A second rotating shaft is provided on the fixed mounting plate (817). A storage plate (818) is inclined downward corresponding to the position of the second rotating shaft below the material suction block (810).The higher end of the material storage plate (818) is connected to the bottom end of the second rotating shaft. A second rotating motor (819) is provided at the top of the fixed mounting plate (817). The output end of the second rotating motor (819) is connected to the top end of the second rotating shaft. The top of the material storage plate (818) has a material storage groove (820). A second electromagnet (821) is provided on the inner surface of the bottom of the material storage groove (820).

2. The anti-impact test device for an LED display screen according to claim 1, wherein: On the outer surfaces of the two lateral sides of the protection frame (2) corresponding to the entrance and exit (4), protection doors are slidably connected in the vertical direction, and a third lifting device is provided between the protection doors and the protection frame (2).

3. The anti-shock test device for an LED display according to claim 2, wherein: The linear transmission mechanism (9) includes a driving motor, a transmission gear is installed on the driving motor, and the transmission gear is meshed with a transmission rack.

4. The anti-impact test device for an LED display according to claim 3, characterized in that: Linear bushings are provided at the positions of the lifting support plate (806) corresponding to the first guiding and inserting rod (807) and at the positions of the second pressing plate (809) corresponding to the second guiding and inserting rod (811).

5. A shock resistance test device for an LED display according to claim 3, characterized in that: The electric turntable (602), the first pressure sensor (604), the first rotating motor (610), the first lifting device (614), the telescopic device (804), the second lifting device (805), the second pressure sensor (812), the height sensor (813), the first electromagnet (815), the infrared positioning lamp (816), the second rotating motor (819), the second electromagnet (821), the third lifting device and the driving motor in the linear transmission mechanism (9) are all electrically connected to the control device (7).

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