A kind of detection equipment for LED display screen

Abstract

The present invention discloses a detection device for an LED display screen, which belongs to the technical field of display screen detection, and includes a detection platform and an end detection sealing plate for placing a display screen component to be tested, and the upper side walls of the front and rear ends of the detection platform are both provided with a push groove, and the inner end surface of the push groove is connected to a U-shaped seat through a hydraulic push rod, and the upper side walls at both ends of the U-shaped seat are both connected to a lower arc panel. The present invention can detect the concave and convex surface on the sealing surface of the display screen component by using a plurality of pressure-testing contacts through the arrangement of a pressure-testing contact and a deflection-testing assembly, and then amplify the deflection of the pressure-testing contact caused by the concave and convex surface through a polarization magnifying plate, so that the small-angle deflection caused by the subtle concave and convex surface can also be accurately and intuitively detected, and at the same time, the arrangement of a strong spring rod and a limit assembly can use the strong spring rod to continuously simulate the state of pressure and impact on the edge of the rubber surface of the display screen component during use, and detect the condition of the rubber surface after the application state.

Description

Technical Field

[0001] The invention relates to the technical field of display screen detection, and in particular to a detection device for an LED display screen. Background Art

[0002] LED display is a display method that controls semiconductor light emitting diodes. It is composed of tens of thousands to hundreds of thousands of semiconductor light emitting diode pixels evenly arranged. The rental display adopts SMD surface mount three-in-one packaging technology. It is ultra-light, ultra-thin, space-saving, and can be spliced ​​in any direction, size, and shape. It is suitable for theme parks, bars, auditoriums, theaters, parties, building curtain walls and other occasions.

[0003] During the production of rental display screens for outdoor use, after the display screen panel is locked with the bottom shell, waterproof glue is poured between the LED lamp beads of the display screen and the PCB board to prevent the intrusion of moisture and dust and improve the reliability and stability of the display screen. However, during the production and assembly process, the display screen needs to be constantly moved on the conveyor belt and assembled with other shell components, which can easily lead to uneven penetration of the potting glue during movement or assembly collision, affecting the potting effect and the performance of the display screen. In addition, during daily use of rental display screens, outdoor display screens need to be frequently transported and assembled. If the user does not add a back panel or the back panel is not sealed with glue during installation, water will enter the electronic components, affecting the viscosity of the glue, causing the glue at the edge or joint of the screen to crack, fall off or overflow, which is called glue collision. Since the potting glue is adhered to the LED lamp beads, the glue collision phenomenon can easily cause the LED lamp beads to fall off, thereby damaging the entire display screen. Therefore, a detection device for LED display screens is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that users fail to add a back panel or apply sealant to the back panel during installation, resulting in water ingress into electronic components, affecting the viscosity of the glue, and causing the glue at the edge or joint of the screen to crack, fall off or overflow, namely, the glue collision phenomenon. Since the potting glue is adhered to the LED lamp beads, the glue collision phenomenon can easily cause the LED lamp beads to fall off, thereby damaging the entire display screen. A detection device for an LED display screen is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A detection device for an LED display screen, comprising a detection platform and an end detection sealing plate for placing a display screen component to be tested, wherein the upper side walls of the front and rear ends of the detection platform are provided with a push groove, the inner end surface of the push groove is connected to a U-shaped seat through a hydraulic push rod, the upper side walls at both ends of the U-shaped seat are connected to a lower arc panel, the upper side walls of the left and right ends of the detection platform are provided with a storage groove, the inner end surface of the storage groove is connected to an upper arc panel through a reset telescopic rod, the top end of the upper arc panel is fixedly connected to the side wall of the end detection sealing plate through a right-angle plate, and a limit groove for placing a display screen component is provided at the center position of the detection platform;

[0007] An air pump and an air pressure sensor are fixedly connected to the top of the end measuring sealing plate, respectively; a sealing frame is fixedly connected to the bottom of the end measuring sealing plate; electric control rails are provided on the left and right inner walls of the sealing frame; a plurality of pressure measuring contacts are connected to the inner walls of the electric control rails via guide cross bars; a deflection measuring assembly is provided on one side of the plurality of pressure measuring contacts; a plurality of mounting grooves are provided on the U-shaped seat; a double arc surface ring is connected to the inner walls of the mounting grooves via strong spring rods; and limit position assemblies are provided on both the left and right sides of the double arc surface ring.

[0008] Preferably, a plurality of supports are fixedly connected to the bottom end of the detection platform, the inner end surface of the propulsion groove on the detection platform is fixedly connected to the side wall of the hydraulic push rod, and the output end of the hydraulic push rod is fixedly connected to the two lower arc panels through a U-shaped seat.

[0009] Preferably, the upper arc panel is provided with two arc surfaces, the arc surfaces on the upper arc panel are matched with the lower arc panel, and the top end of the resetting telescopic rod is fixedly connected to the bottom end of the upper arc panel through a platform plate.

[0010] Preferably, the inner side wall of the electric control guide rail in the sealing frame is slidably connected to the end of the guide cross bar, the side wall of the guide cross bar is rotatably connected to the inner side wall of the pressure measuring contact, the inner side wall of the pressure measuring contact is provided with an annular groove, and the inner side wall of the annular groove is connected to a torsion spring.

[0011] Preferably, the deflection measuring assembly consists of an inner arc plate and two opposing photoelectric sensors, the end side wall of the guide cross bar is fixedly connected to the inner side wall of the inner arc plate through a fixing rod, and the two ends of the inner arc plate are respectively fixedly connected to the two opposing photoelectric sensors.

[0012] Preferably, a polarization magnifying plate is fixedly connected to the outer side wall of the pressure-test contact, and the polarization magnifying plate is located on the horizontal line of the center of the inner arc plate.

[0013] Preferably, the inner side wall of the mounting groove on the U-shaped seat is fixedly connected to the outer side wall of the fixed end of the strong spring rod, and the outer side wall of the piston rod end of the strong spring rod is fixedly connected to the inner side wall of the double-arc collar.

[0014] Preferably, the limit assembly consists of a hyperbolic limit magnetic plate and an electromagnetic plate, the inner side wall of the U-shaped seat is fixedly connected to a slide slot seat, the inner side wall of the slide slot seat is fixedly connected to the electromagnetic plate, and the side wall of the electromagnetic plate is fixedly connected to the plane end of the hyperbolic limit magnetic plate by adjusting the telescopic rod.

[0015] Preferably, the side wall of the hyperbolic limiting magnetic plate is slidably connected to the inner wall of the slide slot seat, and the hyperbolic surface end of the hyperbolic limiting magnetic plate is in contact with the outer side wall of the piston rod end of the strong spring rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This scheme can use multiple pressure measuring contacts to detect the concave and convex surfaces on the sealing surface of the display screen component through the setting of pressure measuring contacts and deflection measuring components, and then amplify the deflection of the pressure measuring contacts caused by the concave and convex surfaces through the polarization magnifying plate, so that the small angle deflection caused by the subtle concave and convex surfaces can also be accurately and intuitively detected.

[0018] 2. This solution uses a strong spring rod and a limit assembly to continuously simulate the pressure and impact state of the edge of the rubber surface of the display screen during use, and detect the condition of the rubber surface after the application, so that the detection is more in line with the daily use of the rental display screen, making the detection more comprehensive and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a detection device for an LED display screen proposed by the present invention;

[0020] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0021] Figure 3 An assembly diagram of a detection device for an LED display screen proposed by the present invention;

[0022] Figure 4 This is a structural schematic diagram of the position of a guide crossbar in a detection device for an LED display screen proposed by the present invention;

[0023] Figure 5 This is a structural schematic diagram of the positions of multiple pressure-testing contacts in a detection device for an LED display screen proposed by the present invention;

[0024] Figure 6 for Figure 5 The enlarged view of point B in the middle;

[0025] Figure 7 This is a structural schematic diagram of the position of a torsion spring in a detection device for an LED display screen proposed by the present invention;

[0026] Figure 8 This is a structural schematic diagram of the positions of multiple strong spring rods in a detection device for an LED display screen proposed by the present invention;

[0027] Fig. 9 The present invention is a schematic structural diagram of a limit assembly in a detection device for an LED display screen.

[0028] In the figure: 1. detection platform; 2. end measuring sealing plate; 3. display screen; 4. hydraulic push rod; 5. U-shaped seat; 6. lower arc panel; 7. upper arc panel; 8. platform plate; 9. resetting telescopic rod; 10. air pump; 11. air pressure sensor; 12. sealing frame; 13. guide cross bar; 14. pressure measuring contact; 15. inner arc plate; 16. through-beam photoelectric sensor; 17. polarization amplifying plate; 18. torsion spring; 19. strong spring rod; 20. double arc surface ring; 21. slide slot seat; 22. electromagnetic plate; 23. adjusting telescopic rod; 24. hyperbolic limit magnetic plate. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are 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 position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Example, see Figures 1 to 9, a detection device for an LED display screen, comprising a detection platform 1 for placing a display screen component 3 to be tested and an end test sealing plate 2, the upper side walls of the front and rear ends of the detection platform 1 are provided with a push groove, the inner end surface of the push groove is connected to a U-shaped seat 5 through a hydraulic push rod 4, the upper side walls of both ends of the U-shaped seat 5 are connected to a lower arc panel 6, the upper side walls of the left and right ends of the detection platform 1 are provided with a storage groove, the inner end surface of the storage groove is connected to an upper arc panel 7 through a reset telescopic rod 9, the top of the upper arc panel 7 is fixedly connected to the side wall of the end test sealing plate 2 through a right-angle plate, a limit groove for placing a display screen component 3 is provided at the center position of the detection platform 1, and a plug-in circuit for energizing the display screen component 3 is arranged in the limit groove, which is used to check whether the display of the display screen component 3 is normal after each stage of testing;

[0033] The top of the end measuring sealing plate 2 is respectively fixedly connected with an air pump 10 and an air pressure sensor 11, wherein the sensing probe of the air pressure sensor 11 is arranged at the bottom of the end measuring sealing plate 2, and the bottom of the end measuring sealing plate 2 is fixedly connected with a sealing frame 12, and the left and right inner walls of the sealing frame 12 are provided with electric control rails, and the inner wall of the electric control rail is connected with a plurality of pressure measuring contacts 14 through a guide cross bar 13, and a deflection measuring component is arranged on one side of the plurality of pressure measuring contacts 14;

[0034] Furthermore, a plurality of supports are fixedly connected to the bottom end of the detection platform 1, the inner end surface of the push groove on the detection platform 1 is fixedly connected to the side wall of the hydraulic push rod 4, the output end of the hydraulic push rod 4 is fixedly connected to the two lower arc panels 6 through the U-shaped seat 5, the upper arc panel 7 is provided with two arc surfaces, the arc surface on the upper arc panel 7 is adapted to the lower arc panel 6, the top end of the reset telescopic rod 9 is fixedly connected to the bottom end of the upper arc panel 7 through the platform plate 8, the inner side wall of the electric control guide rail in the sealing frame 12 is slidably connected to the end of the guide cross bar 13, and the side wall of the guide cross bar 13 It is rotatably connected to the inner side wall of the pressure measuring contact 14, and an annular groove is provided on the inner side wall of the pressure measuring contact 14. A torsion spring 18 is connected to the inner side wall of the annular groove. The deflection measuring assembly is composed of an inner arc plate 15 and two opposing photoelectric sensors 16. The side wall at the end of the guide cross bar 13 is fixedly connected to the inner side wall of the inner arc plate 15 through a fixing rod. The two ends of the inner arc plate 15 are respectively fixedly connected to the two opposing photoelectric sensors 16. A polarization magnifying plate 17 is fixedly connected to the outer side wall of the pressure measuring contact 14, and the polarization magnifying plate 17 is located on the horizontal line of the center of the inner arc plate 15.

[0035] It should be noted that: the display screen component 3 to be tested is inserted obliquely from the top of the U-shaped seat 5 into the limit groove on the detection platform 1 with the side encapsulated with waterproof glue facing up, and the circuit is connected with the plug-in circuit in the limit groove, and then the hydraulic push rods 4 at the front and rear ends are started synchronously. The start of the hydraulic push rods 4 will push the U-shaped seat 5 toward the position of the display screen component 3 for a distance and then stop, thereby driving the two lower arc panels 6 to move in the same direction, and the lower arc surfaces move to the arc surface of the upper arc panel 7 to contact each other, and the upper arc panel 7 and the platform plate 8 are continuously pressed into the storage groove through the resetting telescopic rod 9, then the downward movement of the upper arc panel 7 will drive the end test sealing plate 2 and the sealing frame 12 to move downward together, and the downward movement of the sealing frame 12 will drive the guide cross bar 13 and multiple pressure test contacts 14 to move downward synchronously, so that the pressure test contacts 14 move downward and slightly press on the display On the sealing surface of the screen component 3, the hydraulic push rod 4 stops pushing at this time, and the continuous downward pressure of the pressure measuring contact 14 also stops, and then the guide cross bar 13 is controlled to slide in the electric control guide rail of the sealing frame 12, so that multiple pressure measuring contacts 14 can slide on the sealing surface of the display screen component 3. If the sealing surface of the display screen component 3 is not evenly penetrated and there are concave and convex surfaces, the pressure measuring contact 14 will deviate on the concave and convex surface and deflect at a small angle on the guide cross bar 13. The deflection of the pressure measuring contact 14 will drive the polarization magnifying plate 17 to rotate together. The long diameter deflection of the polarization magnifying plate 17 will make the arc deflection path of its end larger. The arc deviation of the polarization magnifying plate 17 will block the laser path of the opposite photoelectric sensor 16, and then the opposite photoelectric sensor 16 on the inner arc plate 15 will sense it and transmit the change through the output signal.

[0036] The above advantages are as follows: in this way, the concave and convex surfaces on the sealing surface of the display screen component 3 can be detected by using multiple pressure measuring contacts 14, and then the deflection of the pressure measuring contacts 14 caused by the concave and convex surfaces can be amplified by the polarization magnifying plate 17, so that the small angle deflection caused by the subtle concave and convex surfaces can also be accurately and intuitively detected;

[0037] The U-shaped seat 5 is provided with a plurality of mounting grooves, the inner side wall of the mounting groove is connected with a double arc surface collar 20 through a strong spring rod 19, and both sides of the double arc surface collar 20 are provided with limit position components;

[0038] Further, the inner wall of the mounting groove on the U-shaped seat 5 is fixedly connected to the outer wall of the fixed end of the strong spring rod 19, the outer wall of the piston rod end of the strong spring rod 19 is fixedly connected to the inner wall of the double arc surface ring 20, the limiting assembly is composed of a hyperbolic limiting magnetic plate 24 and an electromagnetic plate 22, the inner wall of the U-shaped seat 5 is fixedly connected to a slide seat 21, the inner wall of the slide seat 21 is fixedly connected to the electromagnetic plate 22, the side wall of the electromagnetic plate 22 is fixedly connected to the plane end of the hyperbolic limiting magnetic plate 24 by adjusting the telescopic rod 23, the side wall of the hyperbolic limiting magnetic plate 24 is slidably connected to the inner wall of the slide seat 21, and the hyperbolic end of the hyperbolic limiting magnetic plate 24 is in contact with the outer wall of the piston rod end of the strong spring rod 19;

[0039] It should be noted that: after the flatness of the sealing surface of the display screen component 3 is detected, the hydraulic push rod 4 is continued to be started to push the U-shaped seat 5 toward the display screen component 3. With continuous pushing, first, the sealing frame 12 will continue to move down and press on the sealing surface of the display screen component 3 to form a sealed space. Secondly, the piston rod end of the strong spring rod 19 will be pushed to the edge of the rubber surface of the display screen component 3, and the edge of the rubber surface of the display screen component 3 will be continuously pressed to simulate the state of the display screen component 3 being compressed during daily use. When the strong spring rod 19 is continuously pressed, the double-arc surface ring 20 thereon will be pressed on the curved surface of the hyperbolic limit magnetic plate 24, and the hyperbolic limit magnetic plate 24 will compress the adjusting telescopic rod 23. After the double-arc surface ring 20 passes through the hyperbolic surface of the hyperbolic limit magnetic plate 24, the hyperbolic limit magnetic plate 24 will be reset under the action of the adjusting telescopic rod 23, and the pop-up limit of the strong spring rod 19 will be set, and then the hydraulic push rod 4 will be returned to its original position. A short distance is set, and multiple electromagnetic plates 22 are energized to allow the electromagnetic plates 22 to magnetically attract the hyperbolic limit magnetic plate 24, so that the hyperbolic limit magnetic plate 24 is separated from the limit of the double arc surface ring 20. After the strong spring rod 19 is released from the limit, its piston rod end will instantly impact the edge of the rubber surface of the display screen component 3, so as to simulate the state that the edge of the display screen component 3 is impacted during daily use. Then, the air pump 10 is started to slowly pass gas into the sealing frame 12, and the internal air pressure change is monitored in real time through the air pressure sensor 11. When the filled gas gradually increases and the internal air pressure of the sealing frame 12 gradually decreases (it should be particularly noted that the gas filling rate in this process is extremely slow, and the continued filling of gas is stopped after the internal air pressure of the sealing frame 12 reaches a constant for the first time), it means that during the pressure and impact detection process, the rubber surface of the display screen component 3 has cracked and other damages;

[0040] The above advantages are: in this way, the strong spring rod 19 can be used to continuously simulate the pressure and impact state of the edge of the rubber surface of the display screen 3 during use, and the rubber surface condition after the application state can be detected, so that the detection is more in line with the daily use state of the rental display screen, making the detection more comprehensive and reliable;

[0041] When the present invention is in use, the display screen component 3 to be inspected is placed with the side of the waterproof glue being potted upward, and is obliquely inserted from the top of the U-shaped seat 5 into the limit groove on the inspection platform 1, and the circuit is connected with the plug-in circuit in the limit groove, and then the hydraulic push rods 4 at the front and rear ends are synchronously started. When the hydraulic push rods 4 are started, the U-shaped seat 5 is pushed toward the position where the display screen component 3 is located for a distance and then stops, thereby driving the two lower arc panels 6 to move in the same direction, and the lower arc panels 6 move to the arc surface of the upper arc panel 7 to contact each other. The upper arc panel 7 and the platform plate 8 are continuously pressed into the storage groove through the resetting telescopic rod 9, and the downward movement of the upper arc panel 7 will drive the end test sealing plate 2 and the sealing frame 12 to move downward together, and the downward movement of the sealing frame 12 will drive the guide cross bar 13 and the multiple pressure measuring contacts 14 to move downward synchronously, so that the pressure measuring contacts 14 move downward and slightly press on the sealing surface of the display screen component 3. At this time, the pushing of the hydraulic push rod 4 stops, and the continuous downward pressure of the pressure measuring contacts 14 also stops, and then the guide cross bar 13 is controlled to move in the electric control guide of the sealing frame 12. Sliding in the rail is achieved by controlling the end of the guide cross bar 13 to slide in its groove by an electrically controlled guide rail. This is an existing technical means and will not be described in detail here. Allow multiple pressure measuring contacts 14 to slide on the sealing surface of the display screen component 3. If the sealing surface of the display screen component 3 is not evenly penetrated and there are concave and convex surfaces, the pressure measuring contact 14 will deviate on the concave and convex surface and deflect at a small angle on the guide cross bar 13. The deflection of the pressure measuring contact 14 will drive the polarization magnifying plate 17 to rotate together. The long diameter deflection of the polarization magnifying plate 17 will make the arc deflection path of its end larger. The arc deviation of the polarization magnifying plate 17 will block the laser path of the opposite photoelectric sensor 16, and then the opposite photoelectric sensor 16 on the inner arc plate 15 will sense it. In this way, multiple pressure measuring contacts 14 can be used to detect the concave and convex surface on the sealing surface of the display screen component 3, and then the deflection of the pressure measuring contact 14 caused by the concave and convex surface will be amplified by the polarization magnifying plate 17, so that the small angle deflection caused by the subtle concave and convex surface can also be accurately and intuitively detected.

[0042] After the flatness of the sealing surface of the display screen component 3 is detected, the hydraulic push rod 4 is continued to be started to push the U-shaped seat 5 toward the display screen component 3. With continuous pushing, first, the sealing frame 12 will continue to move downward and press on the sealing surface of the display screen component 3 to form a sealed space. Secondly, the piston rod end of the strong spring rod 19 will be pushed to the edge of the rubber surface of the display screen component 3, and the edge of the rubber surface of the display screen component 3 will be continuously pressed to simulate the state of the display screen component 3 being pressed during daily use. When the strong spring rod 19 is continuously pressed The double-arc collar 20 thereon will press on the curved surface of the hyperbolic limit magnetic plate 24, and allow the hyperbolic limit magnetic plate 24 to compress the adjustment telescopic rod 23. After the double-arc collar 20 passes through the hyperbolic surface of the hyperbolic limit magnetic plate 24, the hyperbolic limit magnetic plate 24 will reset under the action of the adjustment telescopic rod 23, and the pop-up limit of the strong spring rod 19 will be set. Then, the hydraulic push rod 4 will return a short distance, and multiple electromagnetic plates 22 will be energized to allow the electromagnetic plates 22 to magnetically attract the hyperbolic limit magnetic plate 24, so that the hyperbolic limit magnetic plate 24 will be separated from the For the limitation of the double arc surface ring 20, after the strong spring rod 19 is released from the limitation, its piston rod end will instantly impact on the edge of the rubber surface of the display screen component 3, so as to simulate the state that the edge of the display screen component 3 is impacted during daily use, and then the air pump 10 is started to slowly pass gas into the sealing frame 12, and the internal air pressure change is monitored in real time through the air pressure sensor 11. When the internal air pressure of the sealing frame 12 gradually decreases during the process of gradually increasing the filled gas (it should be particularly noted that the filling rate of the gas in this process is extremely slow, and the continuous filling of the gas is stopped after the internal air pressure of the sealing frame 12 reaches a constant for the first time), it means that during the detection process of pressure and impact, the rubber surface of the display screen component 3 has cracks and other damages. In this way, the strong spring rod 19 can be used to continuously simulate the pressure and impact state of the edge of the rubber surface of the display screen component 3 during use, and the rubber surface condition after the application state is detected, so that the detection is more in line with the daily use state of the rental display screen, and the detection is more comprehensive and reliable.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A testing device for an LED display screen, comprising a testing platform (1) for placing a display screen component (3) to be tested and an end testing sealing plate (2), characterized in that: The upper side walls of the front and rear ends of the detection platform (1) are provided with a push groove, the inner end surface of the push groove is connected to a U-shaped seat (5) through a hydraulic push rod (4), the upper side walls at both ends of the U-shaped seat (5) are connected to a lower arc panel (6), the upper side walls of the left and right ends of the detection platform (1) are provided with a storage groove, the inner end surface of the storage groove is connected to an upper arc panel (7) through a reset telescopic rod (9), the top end of the upper arc panel (7) is fixedly connected to the side wall of the end test sealing plate (2) through a right angle plate, and a limit groove for placing a display screen (3) is provided at the center position of the detection platform (1); The top end of the end measuring sealing plate (2) is respectively fixedly connected to an air pump (10) and an air pressure sensor (11), and the bottom end of the end measuring sealing plate (2) is fixedly connected to a sealing frame (12). The left and right inner walls of the sealing frame (12) are provided with electric control rails. The inner walls of the electric control rails are connected to a plurality of pressure measuring contacts (14) via a guide cross bar (13). A deflection measuring component is arranged on one side of the plurality of pressure measuring contacts (14). The U-shaped seat (5) is provided with a plurality of mounting grooves. The inner walls of the mounting grooves are connected to a double arc surface ring (20) via a strong spring rod (19). Limiting components are arranged on both the left and right sides of the double arc surface ring (20).

2. The detection device for an LED display screen according to claim 1, characterized in that: The bottom end of the detection platform (1) is fixedly connected to a plurality of supports, the inner end surface of the push groove on the detection platform (1) is fixedly connected to the side wall of the hydraulic push rod (4), and the output end of the hydraulic push rod (4) is fixedly connected to two lower arc panels (6) via a U-shaped seat (5).

3. The detection device for an LED display screen according to claim 1, characterized in that: The upper arc panel (7) is provided with two arc surfaces, the arc surfaces on the upper arc panel (7) are adapted to the lower arc panel (6), and the top end of the resetting telescopic rod (9) is fixedly connected to the bottom end of the upper arc panel (7) via a platform plate (8).

4. The detection device for an LED display screen according to claim 1, characterized in that: The inner side wall of the electric control guide rail in the sealing frame (12) is slidably connected to the end of the guide cross bar (13), the side wall of the guide cross bar (13) is rotatably connected to the inner side wall of the pressure measuring contact (14), the inner side wall of the pressure measuring contact (14) is provided with an annular groove, and the inner side wall of the annular groove is connected to a torsion spring (18).

5. The detection device for an LED display screen according to claim 1, characterized in that: The deflection measuring assembly is composed of an inner arc plate (15) and two opposing photoelectric sensors (16); the end side wall of the guide cross bar (13) is fixedly connected to the inner side wall of the inner arc plate (15) via a fixing rod; and the two ends of the inner arc plate (15) are respectively fixedly connected to the two opposing photoelectric sensors (16).

6. The detection device for an LED display screen according to claim 5, characterized in that: A polarization magnifying plate (17) is fixedly connected to the outer side wall of the pressure measuring contact (14), and the polarization magnifying plate (17) is located on a horizontal line at the center of the inner arc plate (15).

7. The detection device for an LED display screen according to claim 1, characterized in that: The inner side wall of the mounting groove on the U-shaped seat (5) is fixedly connected to the outer side wall of the fixed end of the strong spring rod (19), and the outer side wall of the piston rod end of the strong spring rod (19) is fixedly connected to the inner side wall of the double arc surface ring (20).

8. The detection device for an LED display screen according to claim 1, characterized in that: The limit assembly is composed of a hyperbolic limit magnetic plate (24) and an electromagnetic plate (22); the inner side wall of the U-shaped seat (5) is fixedly connected to a slide seat (21); the inner side wall of the slide seat (21) is fixedly connected to the electromagnetic plate (22); and the side wall of the electromagnetic plate (22) is fixedly connected to the plane end of the hyperbolic limit magnetic plate (24) by adjusting the telescopic rod (23).

9. The detection device for an LED display screen according to claim 8, characterized in that: The side wall of the hyperbolic limit magnetic plate (24) is slidably connected to the inner side wall of the slide slot seat (21), and the hyperbolic surface end of the hyperbolic limit magnetic plate (24) is in contact with the outer side wall of the piston rod end of the strong spring rod (19).

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