Impact resistance testing device for LED display screen

Abstract

The impact resistance testing device comprises a supporting bottom plate, a protective frame is arranged on the upper portion of the supporting bottom plate, a supporting column is arranged on the portion, located on the longitudinal side of the protective frame, of the top of the supporting bottom plate, entrances and exits are formed in the two transverse sides of the protective frame, and two parallel sliding rails are arranged on the portion, located on the inner sides of the entrances and exits, of the top of the supporting bottom plate. At least two supporting limiting assemblies transversely slide between the sliding rails, a control device is arranged on the outer surface of the side, longitudinally away from the supporting column, of the protection frame, and a testing assembly is slidably connected to the supporting column in the vertical direction. The device has the beneficial effects that the device is reasonable in design, simple and stable in overall structure and high in practicability; the impact force borne by the display screen when the display screen is impacted can be captured and monitored, meanwhile, impact resistance testing can be conducted on the display screen at different positions and different angles, the impact position of the testing ball on the display screen can be predicted, and the impact force generated by the testing ball can be controlled.

Description

Technical Field

[0001] The invention relates to the technical field of display screen impact resistance testing, in particular to an impact resistance testing device for an LED display screen. Background Art

[0002] LED display is a display device made by light-emitting diode (LED) technology, with the advantages of high brightness, low energy consumption, long life, etc. It can display text, images, videos and other contents by arranging a large number of LED lamp beads into a matrix. At the same time, the display effect is bright and clear, and the brightness can be automatically adjusted according to the ambient light. It is an ideal choice for modern digital information display. The impact resistance of LED display 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, LED display screens need to be sampled and tested before leaving the factory to ensure the stability of product quality.

[0003] Chinese patent CN221173814U discloses an impact resistance detection device for the production of electronic display screens, which drives an upper pressure plate and an upper punch head through a cylinder to run on a slide seat and a slide rail through a T-shaped plate, and uses the upper pressure plate to hit the electronic display screen on the limit slot seat at the fastest speed, and then observes the degree of fragmentation of the impacted electronic display screen to determine the impact resistance of the electronic display screen, and a pressure gauge is provided on the filter air valve to observe the pressure value entering the cylinder.

[0004] In the above patent, the test method of using an air cylinder to drive the upper pressure plate to hit the display screen on the limit slot seat at the fastest speed to determine the impact resistance of the electronic display screen is easily affected by air pressure fluctuations, especially when the air cylinder starts or stops quickly. This instantaneous fluctuation will affect the acceleration of the upper pressure plate, and the display screen may be subjected to impact forces of different magnitudes at different time points. These changes are usually not easy to control accurately. At the same time, it is impossible to perform impact tests on different positions and angles of the display screen, which affects the accuracy of the test results and needs further development and improvement. Summary of the invention

[0005] The purpose of the present invention is to provide an impact resistance testing device for LED display screens in order to solve the problem that the existing impact resistance testing device for LED display screens is inconvenient to control the impact force on the display screen and cannot perform impact tests on different positions and angles of the display screen, resulting in inaccurate test results.

[0006] The present invention achieves the above-mentioned purpose through the following technical scheme: an impact resistance testing device for an LED display screen, comprising a supporting base plate, a protective frame is arranged on the upper part of the supporting base plate, a supporting column is arranged on the top of the supporting base plate on the longitudinal side of the protective frame, entrances and exits are opened on both lateral sides of the protective frame, two mutually parallel slide rails are arranged on the top of the supporting base plate on the inner side of the entrances and exits, at least two support limit assemblies slide laterally between the slide rails, a control device is arranged on the outer surface of the side of the protective frame away from the support column in the longitudinal direction, a test assembly is slidably connected to the support column in the vertical direction, and a linear transmission mechanism is arranged between the support limit assembly and the supporting base plate and between the test assembly and the support column.

[0007] Furthermore, the support and limiting assembly includes a movable support plate, a slider is provided at the bottom of the movable support plate corresponding to the position of the slide rail, the slider is slidably connected to the slide rail, the linear transmission mechanism is provided between one end of the top of the movable support plate and the support bottom plate, an electric turntable is provided on the top of the movable support plate, two support plug-in plates are equidistantly provided on the top of the electric turntable in a circumferential direction, a first pressure sensor is provided at the center of the top of the electric turntable, a lifting plug-in plate is vertically plugged and installed on the support plug-in plates, a first support connecting plate is provided between the inner bottom ends of the lifting plug-in plates, a first pressure plate is provided at the bottom of the first support connecting plate corresponding to the position of the first pressure sensor, and the bottom of the first pressure plate is in contact with the first pressure sensor. The lifting and lowering plug-in plate is provided with a first rotating shaft at one end away from the supporting plug-in plate, and a rotating support mounting plate is provided on the inner side of the lifting and lowering plug-in plate corresponding to the position of the first rotating shaft, a first rotating motor is provided on the outer side of the lifting and lowering plug-in plate at one end of the first supporting connecting plate, one side of the rotating support mounting plate is connected with the first rotating shaft, and the other side is provided with a U-shaped limiting bearing plate, the output end of the first rotating motor is connected with one end of the first rotating shaft, a second supporting connecting plate is provided between the U-shaped limiting bearing plates, a limiting pressure plate is provided on the inner side of the U-shaped limiting bearing plate, and first lifting devices are provided at both ends of the top of the U-shaped limiting bearing plate, and the bottom output end of the first lifting device extends into the inner side of the U-shaped limiting bearing plate and is connected with the top of the limiting pressure plate.

[0008] Furthermore, the test assembly includes a U-shaped sliding mounting seat, the inner surfaces on the two lateral sides of the U-shaped sliding mounting seat are respectively slidably connected with the outer surfaces on the two lateral sides of the support column in the vertical direction, the linear transmission mechanism is arranged between the longitudinal side surface of the U-shaped sliding mounting seat and the longitudinal side surface of the support column, the outer surface of the lateral side of the U-shaped sliding mounting seat is provided with a support socket, the support socket is plugged with a movable mounting plate, the outer surface of the U-shaped sliding mounting seat below the support socket is provided with a telescopic device, the output end of the telescopic device is installed with a support connecting block, and the support connecting The top of the connecting block is connected to the bottom of the movable mounting plate, a second lifting device is arranged on the top of one end of the movable mounting plate close to the support and limit assembly, a lifting support plate is installed on the output end of the bottom of the second lifting device through the movable mounting plate, a first guide plug-in rod is arranged on the top of the lifting support plate away from the end of the second lifting device, the first guide plug-in rod is plug-connected with the movable mounting plate, a support plug-in rod is plug-connected on the lifting support plate between the second lifting device and the first guide plug-in rod, and a second pressure rod is installed on one end of the support plug-in rod located above the lifting support plate The lifting support plate has a support plug rod at one end below the lifting support plate, a suction block is installed, a second guide plug rod is arranged at one end of the bottom of the second pressure plate, the second guide plug rod is plugged and connected with the lifting support plate, a second pressure sensor is arranged at the top of the lifting support plate between the support plug rod and the second guide plug rod, a height sensor is arranged on the outer surface of one longitudinal side of the lifting support plate, a support mounting ring is arranged on the circumferential outer surface of the suction block, the bottom of the suction block has a curved adsorption groove, the inner surface of the adsorption groove is arranged with a first electromagnet, and the bottom circumference of the support mounting ring is A number of infrared positioning lamps are equidistantly arranged around the periphery; a fixed mounting plate is arranged on the outer surface of one side of the U-shaped sliding mounting seat longitudinally close to the supporting and limiting assembly; a second rotating shaft is arranged on the fixed mounting plate; a material storage plate is arranged obliquely downwardly corresponding to the position of the second rotating shaft below the suction block; a higher end of the material storage plate is connected to a bottom end of the second rotating shaft; a second rotating motor is arranged on the top of the fixed mounting plate; an output end of the second rotating motor is connected to a top end of the second rotating shaft; a material storage trough is provided on the top of the material storage plate; a second electromagnet is arranged on the inner surface of the bottom of the material storage trough.

[0009] Furthermore, protective doors are slidably connected to the outer surfaces of the protective frame on both sides in a vertical direction corresponding to the entrances and exits, and a third lifting device is provided between the protective door and the protective frame.

[0010] Furthermore, the linear transmission mechanism includes a driving motor, the driving motor is equipped with a transmission gear, and the transmission gear is meshingly connected with a transmission rack.

[0011] Furthermore, a linear bushing is provided at the position of the lifting support plate corresponding to the first guide plug-in rod and a linear bushing is provided at the position of the second pressure plate corresponding to the second guide plug-in rod.

[0012] Furthermore, 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 light, the second rotating motor, the second electromagnet, the third lifting device and the driving motor in the linear transmission mechanism are all electrically connected to the control device.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention has a reasonable design, 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 can perform impact resistance tests on the display screen at different positions and angles, and can also predict the impact position of the test ball on the display screen and control the impact force that the test ball can generate, so as to improve the accuracy of the test results. In addition, the present invention can also realize automatic loading and replenishing of the test ball, thereby improving the test efficiency and being suitable for batch display screen testing.

[0015] 2. Specifically, the support and limit assembly is provided with a support plug plate, a lifting plug plate, a first support connecting plate, and a structure that cooperates with the first pressure plate, so that the first pressure sensor can capture and monitor the impact force borne by the display screen when it is impacted; the first lifting device drives the limit pressure plate to press against the display screen to achieve fixed limit of the display screen, ensure the stability of its position during the test, and avoid its easy displacement and affect the accuracy of the test results; the multiple support and limit assemblies can also be used in batch display screen testing. When one of the support and limit assemblies drives a display screen to be tested in the protective frame, it can be in another support and limit The display screen can be disassembled and assembled on the assembly to improve the test efficiency; the support and limit assembly on which the display screen is fixedly installed can be adjusted to different positions in the protective frame through the provided linear transmission mechanism, and the display screen installed between the U-shaped limit bearing plates can be driven to rotate to different directions in combination with the provided electric turntable, so that the impact resistance test can be performed on different positions of the display screen; the provided rotating support mounting plate, the first rotating motor, the first rotating shaft and the second supporting connecting plate can be coordinated to 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 realize the impact resistance test of the display screen at different angles.

[0016] 3. Specifically, the test assembly can be used to store multiple test balls through the storage trough on the storage plate. With the cooperation of the second rotating 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 for the test assembly to be lowered after a single test to manually replenish the test balls, which improves the continuity of the test and greatly improves the efficiency of the test. Among them, the second electromagnet can act on the test ball and adsorb it to ensure the stability of the relative position of the test ball during the rising and rotation of the storage plate, prevent it from easily slipping from the storage trough, and improve the safety of use; at the same time, through the cooperation of the second pressure sensor and the height sensor, the weight and height of the test ball can be monitored, and then the impact force generated by its free fall can be converted, so that the impact force generated by the test ball can be controlled by adjusting the height of the test ball; in addition, the support mounting ring and the infrared positioning lamp can predict the impact position of the test ball on the display screen, so that the specific position of the display screen impact test can be accurately set, further improving the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the support and limit assembly in the present invention;

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

[0020] Figure 4 for Figure 2 Enlarged view of part A in the middle;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the test assembly in the present invention;

[0022] Figure 6 It is a left view of the test assembly in the present invention;

[0023] Figure 7 for Figure 6 Enlarged view of middle part B;

[0024] Figure 8 It is a schematic diagram of the cross-sectional structure of the suction block in the present invention.

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

[0026] 601-movable 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 pressing plate, 608-first rotating shaft, 609-rotating support mounting plate, 610-first rotating motor, 611-U-shaped limiting bearing plate, 612-second supporting connecting plate, 613-limiting pressing plate, 614-first lifting device;

[0027] 801-U-shaped sliding mounting seat, 802-supporting plug-in seat, 803-movable mounting plate, 804-telescopic device, 805-second lifting device, 806-lifting support plate, 807-first guide plug-in rod, 808-supporting plug-in rod, 809-second pressing plate, 810-suction block, 811-second guide 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-material storage plate, 819-second rotating motor, 820-material storage trough, 821-second electromagnet. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present invention.

[0030] Combination Figures 1 to 8An impact resistance testing device for an LED display screen shown in the figure comprises a supporting base plate 1, a protective frame 2 is arranged on the upper part of the supporting base plate 1, a supporting column 3 is arranged on the top of the supporting base plate 1 on one longitudinal side of the protective frame 2, entrances and exits 4 are opened on both lateral sides of the protective frame 2, two mutually parallel slide rails 5 are arranged on the top of the supporting base plate 1 on the inner side of the entrances and exits 4, at least two support limit assemblies 6 are slid laterally between the slide rails 5, a control device 7 is arranged on the outer surface of the side of the protective frame 2 away from the support column 3 in the longitudinal direction, a test assembly 8 is slidably connected to the support column 3 in the vertical direction, and a linear transmission mechanism 9 is arranged between the support limit assembly 6 and the supporting base plate 1 and between the test assembly 8 and the support column 3.

[0031] The support and limit assembly 6 includes a movable support plate 601, a slider is arranged at the bottom of the movable support plate 601 corresponding to the position of the slide rail 5, 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 bottom plate 1, an electric turntable 602 is arranged on the top of the movable support plate 601, two support plug-in plates 603 are arranged equidistantly along the circumferential direction on the top of the electric turntable 602, a first pressure sensor 604 is arranged at the center of the top of the electric turntable 602, and a lifting plug-in plate 605 is vertically plugged and installed on the support plug-in plate 603, a first support connecting plate 606 is arranged between the inner bottom ends of the lifting plug-in plate 605, and the bottom of the first support connecting plate 606 corresponds to the first pressure sensor A first pressing plate 607 is arranged at position 604, and the bottom of the first pressing plate 607 contacts the first pressure sensor 604, a first rotating shaft 608 is arranged at one end of the lifting plug plate 605 away from the supporting plug plate 603, a rotating support mounting plate 609 is arranged at the inner side of the lifting plug plate 605 corresponding to the position of the first rotating shaft 608, a first rotating motor 610 is arranged on the outer side of the lifting plug plate 605 at one end of the first supporting connecting plate 606, one side of the rotating support mounting plate 609 is connected to the first rotating shaft 608, and a U-shaped limiting 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, and a second supporting connecting plate 606 is arranged between the U-shaped limiting bearing plates 611. The connecting plate 612, a limiting pressure plate 613 is arranged inside the U-shaped limiting bearing plate 611, and first lifting devices 614 are arranged at both ends of the top of the U-shaped limiting bearing plate 611. The bottom output end of the first lifting device 614 extends into the inside of the U-shaped limiting bearing plate 611 and is connected to the top of the limiting pressure plate 613; through the structure of the supporting plug-in plate 603, the lifting plug-in plate 605, the first supporting connecting plate 606, and the first pressure plate 607, the first pressure sensor 604 can capture and monitor the impact force borne by the display screen when it is impacted; the display screen to be tested is placed between the bottom inner surface of the U-shaped limiting bearing plate 611 and the limiting pressure plate 613, and the first lifting device 614 is used to connect the display screen to the U-shaped limiting bearing plate 611. 14 drives the limiting pressure plate 613 to press against the display screen to achieve fixed limiting of the display screen, ensure the stability of its position during the test, and avoid displacement that affects the accuracy of the test results; the linear transmission mechanism 9 is set to drive the support and limiting assembly 6 as a whole to make linear motion along the support base plate 1, which can not only drive the support and limiting assembly 6 with the display screen fixedly installed to enter and exit the protection frame 2 through the entrance 4, but also can be used in batch display screen testing in combination with the multiple support and limiting assemblies 6. When one of the support and limiting assemblies 6 drives a display screen to be tested in the protection frame 2, the display screen can be disassembled and assembled on another support and limiting assembly 6, thereby improving the test efficiency;The linear transmission mechanism 9 can be used to adjust the different positions of the support and limit assembly 6 on which the display screen is fixedly mounted in the protection frame 2. The electric turntable 602 can be used to drive the display screen mounted between the U-shaped limit bearing plates 611 to rotate to different directions, so as to achieve the impact resistance test of different positions of the display screen; the rotating support mounting plate 609, the first rotating motor 610, the first rotating shaft 608 and the second supporting connecting plate 612 can be used to drive the U-shaped limit bearing plate 611 to rotate, and adjust the inclination angle of the display screen fixedly clamped between the U-shaped limit bearing plates 611, so as to achieve the impact resistance test of the display screen at different angles. ;

[0032] The test assembly 8 includes a U-shaped sliding mounting seat 801, the inner surfaces on both sides of the U-shaped sliding mounting seat 801 are respectively connected to the outer surfaces on both sides of the supporting column 3 in a sliding manner in the vertical direction, a linear transmission mechanism 9 is arranged between the longitudinal surface of the U-shaped sliding mounting seat 801 and the longitudinal surface of the supporting column 3, a support socket 802 is arranged on the outer surface of the lateral side of the U-shaped sliding mounting seat 801, and a movable mounting plate 803 is installed on the support socket 802, and a telescopic device 804 is arranged on the outer surface of the U-shaped sliding mounting seat 801 below the support socket 802, and a support connection block is installed at the output end of the telescopic device 804, and 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 on the top of one end of the mobile mounting plate 803 close to the support and limit assembly 6, and a lifting support plate 806 is installed on the bottom output end of the second lifting device 805 through the mobile mounting plate 803. A first guide plug-in rod 807 is provided on the top of the lifting support plate 806 away from the second lifting device 805. The first guide plug-in rod 807 is plug-connected with the mobile mounting plate 803. The lifting support plate 806 is located between the second lifting device 805 and the first guide plug-in rod 807 and is plug-connected with a support plug-in rod 808. A second pressing plate 809 is installed on the end of the support plug-in rod 808 located above the lifting support plate 806. The support plug-in rod 808 is located between the lifting support plate 806 and the lifting support plate 806. A suction block 810 is installed at one end below, a second guide plug rod 811 is provided at one end of the bottom of the second pressure plate 809, the second guide plug rod 811 is plugged and connected with the lifting support plate 806, a second pressure sensor 812 is provided at the top of the lifting support plate 806 between the support plug rod 808 and the second guide plug rod 811, 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 suction block 810, a curved adsorption groove is provided at the bottom of the suction block 810, a first electromagnet 815 is provided on the inner surface of the adsorption groove, a plurality of infrared positioning lamps 816 are equidistantly provided on the circumference of the bottom of the support mounting ring 814, U A fixed mounting plate 817 is provided on the outer surface of one side of the sliding mounting seat 801 close to the support and limit assembly 6 in the longitudinal direction, and a second rotating shaft is provided on the fixed mounting plate 817. A material storage plate 818 is provided below the suction block 810 and is tilted downwardly corresponding to the position of the second rotating shaft. 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 on the top of the fixed mounting plate 817, and the output end of the second rotating motor 819 is connected to the top end of the second rotating shaft. A material storage trough 820 is provided on the top of the material storage plate 818, and a second electromagnet 821 is provided on the inner surface of the bottom of the material storage trough 820. The inner surface of the bottom of the material storage trough 820 and the top of the second electromagnet 821 are both tilted.The material storage trough 820 on the material storage plate 818 can be used to store multiple test balls. The material of the test balls is selected from metals that can be adsorbed by magnets, so that the second electromagnet 821 can act on the test balls and adsorb them, so as to ensure the stability of the relative position of the test balls during the rising and rotation of the material storage plate 818, prevent them from easily slipping from the material storage trough 820, and improve the safety of use; the second rotating motor 819 and the second rotating shaft cooperate to drive the material storage plate 818 to rotate, and at the same time, the movable mounting plate 803 is driven to move by the telescopic device 804, so that the test balls in the material storage trough 820 away from one end of the support column are directly below the first electromagnet 815 at the bottom of the suction block 810, and the suction block 810 is driven to descend by the second lifting device 805, so that the first electromagnet 815 adsorbs the test balls and then drives them to rise. At this time, the second rotating motor 819, with the cooperation of the second rotating shaft, drives the material storage plate 818 to rotate so that it is away from the movable mounting plate 803, then control the second electromagnet 821 to stop working, so that the test ball in the storage tank 820 will roll along the top of the second electromagnet 821 to the lower end, and the substitute is adsorbed to drive the position of the test ball, so that it can be used for the next adsorption of the first electromagnet 815, realizing the automatic replenishment and filling of the test ball, without moving the installation plate 803 to drop after a single test, and manually replenishing and filling the test ball, which improves the continuity of the test use and greatly improves the efficiency of the test; at the same time, the second pressure sensor 812 and the height sensor 813 are matched to monitor the weight and height of the test ball, and then calculate the impact force generated by its free fall, so as to control the impact force generated by the test ball by adjusting the height of the test ball; in addition, the support mounting ring 814 and the infrared positioning lamp 816 can predict the impact position of the test ball on the display screen, and then accurately set the specific position of the display screen impact resistance test, further improving the accuracy of the test results. ;

[0033] The outer surfaces of the two lateral sides of the protective frame 2 are connected with protective doors in a vertical sliding manner corresponding to the entrances and exits 4, and a third lifting device is arranged between the protective door and the protective frame 2 to prevent the test ball from passing through the entrance and exit 4 and jumping out of the protective frame 2, thereby further improving the safety of use; the linear transmission mechanism 9 includes a driving motor, and the driving motor is equipped with a transmission gear, which is meshingly connected with a transmission rack to drive the support and limit assembly 6 to perform linear motion in the lateral direction and drive the test assembly 8 to perform linear motion in the vertical direction, wherein 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 position of the support and limit assembly 6 and the test assembly 8 after stopping work; the lifting support plate 806 is provided with a linear bushing corresponding to the position of the first guide plug rod 807 and the second pressure plate 809 is provided with a linear bushing corresponding to the position of the second guide plug rod 811, so as to facilitate the smooth lifting and lowering of the first guide plug rod 807 and the second guide plug 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, wherein the first rotating motor 610 and the second rotating motor 819 are also 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 a cylinder or a servo electric cylinder, which is selected according to actual use requirements.

[0034] When in use, the display screen to be tested is placed between the U-shaped limit bearing plates, and then the first lifting device is controlled to drive the limit pressing plate to descend to fix the display screen, and then the linear transmission mechanism can be controlled to drive the mobile support plate to move, so that the support limit assembly with the display screen installed enters the protective frame as a whole, and then the linear transmission mechanism is continued to be controlled to drive the mobile installation to move, and the lateral position of the display screen is adjusted, and then the electric turntable is controlled to drive the display screen to rotate and adjust its direction, and then the first rotating motor is controlled to drive the rotating support installation disk to rotate and adjust the inclination angle of the display screen, that is, the position adjustment of the display screen and the fixed limit operation are completed;

[0035] Then, the linear transmission mechanism on the support column is controlled to drive the test assembly to descend. According to the test requirements, a number of test balls are placed in the material storage tank, and the second electromagnet is controlled to start working to adsorb and limit the test balls. With the cooperation of the second rotating motor and the second rotating shaft, the material storage plate is driven to rotate, and at the same time, the movable mounting plate is driven to move through the telescopic device provided, so that the test ball in the material storage tank away from one end of the support column is directly below the first electromagnet at the bottom of the material suction block, and the material suction block is driven to descend through the provided second lifting device. At the same time, the second electromagnet is controlled to stop working and the first electromagnet is controlled to start working, and the test ball is adsorbed by the first electromagnet, and then the second lifting device is controlled to drive it to rise, and the test ball in the material storage tank will roll along the top of the second electromagnet to the lower end, and the substitute is adsorbed to drive the position of the test ball so that it can be used for the next adsorption by the first electromagnet, and then the second electromagnet is controlled to start working again, and with the cooperation of the second rotating motor and the second rotating shaft, the material storage plate is driven to rotate to make it away from the movable mounting plate, and the automatic filling of the test ball is completed;

[0036] After the first electromagnet absorbs the test ball, the second pressure sensor will monitor the weight change of the suction block under the conduction of the support plug rod and the second pressure plate, and the control device will convert the weight of the test ball. Then, according to the impact force required for the test, with the cooperation of the height sensor, the test assembly is driven to rise and fall to the specified height through the linear transmission mechanism, so as to control the impact force that the test ball can generate by adjusting the height of the test ball, and then the infrared positioning light set at the bottom of the support mounting ring is used to predict the impact position of the test ball on the display screen, and then the first electromagnet can be controlled to stop working, so that the test ball can perform free fall motion to perform 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 automatically filling the test ball, it is possible to perform impact tests on the display screen at different positions and angles. The tested display screen can also be sent out of the protective frame by controlling the linear transmission mechanism, and a new display screen can be sent in to continue the test operation according to the above steps.

[0038] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An impact resistance testing device for an LED display screen, comprising a supporting base plate (1), a protective frame (2) being arranged on the upper part of the supporting base plate (1), characterized in that: A support column (3) is arranged on the top of the support base plate (1) on one longitudinal side of the protection frame (2); entrances and exits (4) are provided on both lateral sides of the protection frame (2); two mutually parallel slide rails (5) are arranged on the top of the support base plate (1) on the inner side of the entrances and exits (4); at least two support limit assemblies (6) slide between the slide rails (5) in the lateral direction; a control device (7) is arranged on the outer surface of the side of the protection frame (2) away from the support column (3) in the longitudinal direction; a test assembly (8) is slidably connected to the support column (3) in the vertical direction; and a linear transmission mechanism (9) is arranged between the support limit assembly (6) and the support base plate (1) and between the test assembly (8) and the support column (3).

2. The impact resistance testing device for LED display screen according to claim 1, characterized in that: The support and limit assembly (6) comprises a movable support plate (601), a slider is arranged at the bottom of the movable support plate (601) corresponding to the position of the slide rail (5), the slider is slidably connected to the slide rail (5), the linear transmission mechanism (9) is arranged between one end of the top of the movable support plate (601) and the support bottom plate (1), an electric turntable (602) is arranged at the top of the movable support plate (601), and two support plug-in plates (603) are arranged at equal distances along the circumferential direction on the top of the electric turntable (602), A first pressure sensor (604) is arranged at the center of the top of the electric turntable (602), a lifting plug plate (605) is vertically plugged and installed on the supporting plug plate (603), a first supporting connecting plate (606) is arranged between the inner bottom ends of the lifting plug plate (605), a first pressing plate (607) is arranged at the bottom of the first supporting connecting plate (606) corresponding to the position of the first pressure sensor (604), the bottom of the first pressing plate (607) is in contact with the first pressure sensor (604), and the lifting plug plate (603) is vertically plugged and installed on the supporting plug plate (603), a first supporting connecting plate (606) is arranged between the inner bottom ends of the lifting plug plate (605), and a first pressing plate (607) is arranged at the bottom of the first supporting connecting plate (606) corresponding to the position of the first pressure sensor (604), and the bottom of the first pressing plate (607) is in contact with the first pressure sensor (604). The plug-in board (605) is provided with a first rotating shaft (608) at one end away from the supporting plug-in board (603), and a rotating support mounting plate (609) is provided at the inner side of the lifting plug-in board (605) corresponding to the position of the first rotating shaft (608). A first rotating motor (610) is provided at the outer side of the lifting plug-in board (605) at one end of the first supporting connecting plate (606). One side of the rotating support mounting plate (609) is connected to the first rotating shaft, and the other side is provided with a U-shaped limiting bearing plate (611). The output end of the first rotating motor (610) is connected to one end of the first rotating shaft, a second supporting connecting plate (612) is arranged between the U-shaped limiting bearing plate (611), a limiting pressure plate (613) is arranged inside the U-shaped limiting bearing plate (611), and first lifting devices (614) are arranged at both ends of the top of the U-shaped limiting bearing plate (611), and the bottom output end of the first lifting device (614) extends into the inside of the U-shaped limiting bearing plate (611) and is connected to the top of the limiting pressure plate (613).

3. The impact resistance testing device for LED display screen according to claim 2, characterized in that: The test assembly (8) comprises a U-shaped sliding mounting seat (801), the inner surfaces on both sides of the U-shaped sliding mounting seat (801) are respectively connected to the outer surfaces on both sides of the supporting column (3) in a sliding manner in the vertical direction, the linear transmission mechanism (9) is arranged between the longitudinal surface of one side of the U-shaped sliding mounting seat (801) and the longitudinal surface of one side of the supporting column (3), the outer surface of one side of the U-shaped sliding mounting seat (801) is provided with a support socket (802), the support socket (802) is plugged with a movable mounting plate (803), the outer surface of the U-shaped sliding mounting seat (801) below the support socket (802) is provided with a telescopic device (804), the telescopic device (80 4) A support connection block is installed at the output end, the top of the support connection block is connected to the bottom of the movable mounting plate (803), a second lifting device (805) is arranged at the top of the end of the movable mounting plate (803) close to the support limit assembly (6), a lifting support plate (806) is installed at the output end of the bottom of the second lifting device (805) through the movable mounting plate (803), a first guide plug rod (807) is arranged at the top of the lifting support plate (806) away from the second lifting device (805), the first guide plug rod (807) is plug-connected with the movable mounting plate (803), and the lifting support plate (806) is located between the second lifting device (805) and the first guide plug rod. A support plug rod (808) is installed between the plug rods (807), and a second pressure plate (809) is installed at one end of the support plug rod (808) located above the lifting support plate (806). A suction block (810) is installed at one end of the support plug rod (808) located below the lifting support plate (806). A second guide plug rod (811) is provided at one end of the bottom of the second pressure plate (809). The second guide plug rod (811) is plug-connected with the lifting support plate (806). A second pressure sensor (812) is provided at the top of the lifting support plate (806) between the support plug rod (808) and the second guide plug rod (811). A height sensor (813) is provided on the outer surface of one longitudinal side of the plate (806); a support mounting ring (814) is provided on the circumferential outer surface of the suction block (810); a curved adsorption groove is provided at the bottom of the suction block (810); a first electromagnet (815) is provided on the inner surface of the adsorption groove; a plurality of infrared positioning lamps (816) are equidistantly provided on the circumference of the bottom of the support mounting ring (814); a fixed mounting plate (817) is provided on the outer surface of one side of the U-shaped sliding mounting seat (801) close to the support limit assembly (6) in the longitudinal direction; a second rotating shaft is provided on the fixed mounting plate (817); a material storage plate (818) is provided below the suction block (810) and is inclined downwardly corresponding to the position of the second rotating shaft;The higher end of the material storage plate (818) is connected to the bottom end of the second rotating shaft, the second rotating motor (819) is arranged 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 material storage plate (818) is provided with a material storage trough (820), and the bottom inner surface of the material storage trough (820) is provided with a second electromagnet (821).

4. The impact resistance testing device for LED display screen according to claim 3, characterized in that: The outer surfaces of both sides of the protection frame (2) are slidably connected with protection doors in the vertical direction corresponding to the entrances and exits (4), and a third lifting device is provided between the protection door and the protection frame (2).

5. The impact resistance testing device for LED display screen according to claim 4, characterized in that: The linear transmission mechanism (9) comprises a driving motor, the driving motor is equipped with a transmission gear, and the transmission gear is meshingly connected with a transmission rack.

6. The impact resistance testing device for LED display screen according to claim 3, characterized in that: The lifting support plate (806) is provided with a linear bushing at a position corresponding to the first guide plug-in rod (807), and the second pressing plate (809) is provided with a linear bushing at a position corresponding to the second guide plug-in rod (811).

7. The impact resistance testing device for LED display screen according to claim 5, 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 light (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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