Stress detection equipment for LED screen shell

Abstract

The invention discloses stress detection equipment for an LED screen shell, which comprises a workbench and a top plate, one end of a vertical rod is vertically fixed on the upper end surface of the workbench, the other end of the vertical rod is fixed on the top plate, an adjusting table is arranged above the workbench, and an LED transparent protective shell is mounted on the adjusting table. According to the stress detection equipment for the LED screen shell, the profiling block structure is adopted, production can be carried out according to LED transparent protective shells of different shapes and structures, perfect matching of the LED transparent protective shells and the profiling block is guaranteed, accordingly, fixing of the LED transparent protective shells is facilitated, basic guarantee is provided for later detection, and the stress detection efficiency is improved through cooperation with a linkage self-locking mechanism. According to the plastic part detection device, the self-locking function can be achieved during plastic part feeding, the stability of the plastic part is guaranteed, automatic unlocking can be achieved after detection is completed, the plastic part is convenient to disassemble and assemble, and therefore the detection efficiency of the plastic part is greatly improved.

Description

Technical Field

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

[0002] The LED transparent screen shell is a mechanism used to wrap and protect the edge of the LED screen, which can effectively prevent the edge of the LED transparent screen from being damaged due to bumps. The existing LED transparent screen shells are mainly mass-produced through mold injection molding. In order to ensure the quality of the LED transparent screen shells, it is necessary to perform stress detection on the produced LED transparent screen shells. In actual use, the existing stress detection equipment has a plastic structure with poor rigidity. During detection, the traditional positioning mechanism clamps and fixes the LED transparent screen shell, which can easily cause deformation and damage to the LED transparent screen shell, thereby affecting the normal progress of the detection. In addition, when the LED transparent screen shell is fixed, cumbersome operations need to be performed, which greatly affects the detection efficiency. To this end, in view of the above problems, a stress detection device for the LED screen shell is designed to better meet actual use needs. Summary of the invention

[0003] The purpose of the present invention is to provide a stress detection device for an LED screen housing to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a stress detection device for an LED screen shell, comprising a workbench and a top plate, wherein one end of a vertical rod is vertically fixed to the upper end surface of the workbench, and the other end of the vertical rod is fixed to the top plate, an adjustment table is arranged above the workbench, an LED transparent protective shell is installed on the adjustment table, and a movable plate is also arranged on the adjustment table, a cylinder is fixed to the lower end surface of the top plate, a mounting bracket is fixed to the output end of the cylinder, the mounting bracket is arranged above the rear side of the adjustment table, a guide rod is connected to the mounting bracket, and a mounting plate is fixed to the guide rod.

[0005] Preferably, the lower end surface of the workbench is evenly fixed with supporting feet, and the upper end surface of the workbench is fixed with an elliptical protrusion, and the elliptical protrusion is located below the adjusting table, and the lower end surface of the workbench is also fixed with a fixing plate. The supporting feet can achieve stable support for the entire device, and the action of the elliptical protrusion can provide basic guarantee for the later automatic clamping and unlocking of the LED transparent protective shell.

[0006] Preferably, the bearing on the fixed plate is connected to the rotating shaft, and a driving gear is fixed to the front end of the rotating shaft, and a transmission gear is fixed to the rear end of the rotating shaft. At the same time, the rotating shaft rotates by 180° each time. The transmission mechanism is formed by the above structure, thereby providing a basic guarantee for the normal operation of the device, and the normal operation of the device can be guaranteed by limiting the rotation angle of the rotating shaft.

[0007] Preferably, the vertical rods are symmetrically distributed about the center line of the workbench, and four vertical rods are provided. Through the action of the vertical rods, the top plate can be supported and fixed to ensure the stability of the device.

[0008] Preferably, a contour block is fixed on the adjusting table by bolts, and a rotating rod is fixed at the lower end of the adjusting table, and the rotating rod is connected to the workbench through a bearing, and at the same time, a driven gear is fixed at the lower end of the rotating rod passing through the workbench, and the driven gear is meshed with the driving gear to realize transmission. When the driving gear rotates, the transmission action between the driven gear and the driving gear can provide a basic force for the rotation of the rotating rod and the adjusting table, thereby realizing automatic feeding.

[0009] Preferably, the profiling block is made of rubber material, and the profiling block and the LED transparent protective shell are nested and connected, and the maximum distance between the profiling block and the movable plate is greater than the width of the LED transparent protective shell. The nesting of the profiling block and the LED transparent protective shell can facilitate the installation and positioning of the LED transparent protective shell, providing a basic guarantee for the subsequent detection of the LED transparent protective shell, and by limiting the distance between the profiling block and the movable plate, the disassembly and assembly of the LED transparent protective shell can be facilitated.

[0010] Preferably, a pressure block is fixed symmetrically on the rear end surface of the movable plate, and the pressure block can achieve a clamping and limiting effect by contacting the LED transparent protective shell; a vertical rod is fixed on the lower end surface of the movable plate, and the vertical rod is slidably connected to the adjusting table, and the vertical rod can slide by contacting the elliptical protrusion; a guide rod is fixed on the front end surface of the movable plate, and the guide rod is slidably connected to the adjusting table; one end of a first spring is fixed to the front end surface of the movable plate, and the other end of the first spring is fixed to the adjusting table; the clamping and limiting of the LED transparent protective shell can be achieved through the action of the pressure block, and the stability of the fixation of the LED transparent protective shell can be ensured; the contact and sliding action between the vertical rod and the elliptical protrusion can provide a basic force for the movement of the movable plate, thereby providing a basic guarantee for the automatic unlocking of the LED transparent protective shell; the sliding guiding action of the guide rod can ensure the stability of the movement of the movable plate, and the action of the first spring can provide a basic force for the automatic resetting of the movable plate.

[0011] Preferably, a convex tooth rod is also fixed on the mounting frame, and the convex tooth rod passes through the workbench and can slide, and the convex tooth rod is engaged with the transmission gear to realize transmission effect, and at the same time, the number of teeth on the convex tooth rod is half of the number of teeth on the transmission gear, and the convex tooth rod contacts with the adjustment platform to realize a limiting effect, and when the mounting frame is forced to move downward, the convex tooth rod is synchronously driven to move downward, and through the transmission effect between the convex tooth rod and the transmission gear, a basic force can be provided for the rotation of the rotating shaft, and by limiting the number of teeth on the convex tooth rod, the rotation angle of the rotating shaft can be limited.

[0012] Preferably, the guide rod and the mounting frame are slidably connected, and three guide rods are distributed at equal angles about the center of the mounting frame, and one end of a second spring is fixed to the guide rod, and the other end of the second spring is fixed to the mounting frame. The sliding action between the guide rod and the mounting frame can ensure the normal movement of the guide rod, and with the action of the second spring, it can provide a force to the guide rod and the mounting plate during detection, so that the LED transparent protective shell is deformed for stress detection, and can also provide a basic force for the automatic resetting of the guide rod when no detection is performed.

[0013] Preferably, a pressure ball is installed on the lower end surface of the mounting plate, and the pressure ball is in contact with the LED transparent protective shell and can roll. A rubber pad is also fixed on the mounting plate, and the thickness of the rubber pad is 2mm-3mm, and a stress sensor is fixed on the rubber pad. At the same time, the stress sensor is flush with the end surface of the pressure ball. Through the action of the pressure ball, pressure can be provided to the LED transparent protective shell during detection, thereby deforming the LED transparent protective shell. In combination with the action of the stress sensor, the stress detection function of the LED transparent protective shell can be realized.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the stress detection equipment of the LED screen shell adopts a contoured block structure, and can be produced according to LED transparent protective shells of different shapes and structures, ensuring the perfect match between the LED transparent protective shell and the contoured block, thereby facilitating the fixation of the LED transparent protective shell and providing a basic guarantee for subsequent detection. In combination with the linked self-locking mechanism, it can achieve self-locking when plastic parts are loaded to ensure the stability of the plastic parts, and can achieve automatic unlocking after the detection is completed, facilitating the disassembly and assembly of plastic parts, thereby greatly improving the detection efficiency of plastic parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall isometric three-dimensional structure of the device of the present invention;

[0016] Figure 2 It is a schematic diagram of the overall three-dimensional structure of the device of the present invention when viewed from above;

[0017] Figure 3 It is a schematic diagram of the overall side view of the stereoscopic structure of the device of the present invention;

[0018] Figure 4 This is a schematic diagram of a three-dimensional structure composed of an adjustment platform and a movable plate of the present invention;

[0019] Figure 5 This is a schematic diagram of the upward-looking three-dimensional structure of the adjustment platform of the present invention;

[0020] Figure 6 Schematic diagram of the three-dimensional structure composed of the elliptical protrusion and the vertical pole of the present invention

[0021] Figure 7 This is a schematic diagram of the three-dimensional structure of the mounting frame of the present invention when viewed from above;

[0022] Figure 8 It is a schematic diagram of the three-dimensional structure of the mounting plate of the present invention.

[0023] In the figure: 1. workbench; 101. support foot; 102. elliptical protrusion; 103. fixed plate; 2. rotating shaft; 201. driving gear; 202. transmission gear; 3. vertical rod; 4. top plate; 5. adjustment table; 501. profiling block; 502. rotating rod; 503. driven gear; 6. LED transparent protective shell; 7. movable plate; 701. pressure block; 702. vertical rod; 703. guide rod; 704. first spring; 8. cylinder; 9. mounting frame; 901. convex tooth rod; 10. guide rod; 1001. second spring; 11. mounting plate; 1101. pressure ball; 1102. rubber pad; 1103. stress sensor. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figure 1-Figure 8 The present invention provides a technical solution: a stress detection device for an LED screen shell, comprising a workbench 1 and a top plate 4, wherein one end of a vertical rod 3 is vertically fixed to the upper end surface of the workbench 1, and the other end of the vertical rod 3 is fixed to the top plate 4, an adjustment platform 5 is arranged above the workbench 1, and an LED transparent protective shell 6 is installed on the adjustment platform 5, and a movable plate 7 is also arranged on the adjustment platform 5, a cylinder 8 is fixed to the lower end surface of the top plate 4, and a mounting bracket 9 is fixed to the output end of the cylinder 8, and the mounting bracket 9 is arranged above the rear side of the adjustment platform 5, a guide rod 10 is connected to the mounting bracket 9, and a mounting plate 11 is fixed to the guide rod 10.

[0026] The lower end surface of the workbench 1 is evenly fixed with supporting feet 101, and the upper end surface of the workbench 1 is fixed with an elliptical protrusion 102, and the elliptical protrusion 102 is located below the adjustment platform 5, and the lower end surface of the workbench 1 is also fixed with a fixing plate 103; the upper bearing of the fixing plate 103 is connected to the rotating shaft 2, and the front end of the rotating shaft 2 is fixed with a driving gear 201, and the rear end of the rotating shaft 2 is fixed with a transmission gear 202, and the rotating shaft 2 rotates at an angle of 180° each time; the vertical rods 3 are symmetrically distributed about the center line of the workbench 1, and four vertical rods 3 are provided; a profiling block 501 is fixed on the adjustment platform 5 by bolts, and a rotating rod 502 is fixed at the lower end of the adjustment platform 5, and the rotating rod 502 is connected to the workbench 1 through a bearing, and the rotating rod 502 is connected to the workbench 1 through a bearing, and the vertical rod 3 is symmetrically distributed about the center line of the workbench 1, and four vertical rods 3 are provided; a profiling block 501 is fixed on the adjustment platform 5 by bolts, and a rotating rod 502 is fixed at the lower end of the adjustment platform 5, and the rotating rod 502 is connected to the workbench 1 through a bearing, and the vertical rod 3 is symmetrically distributed about the center line of the workbench 1, and the vertical rod 3 is provided with four vertical rods 3; a profiling block 501 is fixed on the adjustment platform 5 by bolts, and a rotating rod 502 is fixed at the lower end of the adjustment platform 5, and the rotating rod 502 is connected to the workbench 1 through a bearing, and the vertical rod 3 is symmetrically distributed about the center line of the The lower end of the rotating rod 502 passes through the workbench 1 and is fixed with a driven gear 503, which meshes with the driving gear 201 to achieve a transmission effect; the profiling block 501 is made of rubber material, and the profiling block 501 and the LED transparent protective shell 6 are nested and connected, and the maximum distance between the profiling block 501 and the movable plate 7 is greater than the width of the LED transparent protective shell 6; a convex tooth rod 901 is also fixed on the mounting frame 9, and the convex tooth rod 901 passes through the workbench 1 and can slide, and the convex tooth rod 901 meshes with the transmission gear 202 to achieve a transmission effect, and the number of teeth on the convex tooth rod 901 is half of the number of teeth on the transmission gear 202, and the convex tooth rod 901 contacts the adjustment table 5 to achieve a limiting effect;

[0027] When using the stress detection device of the LED screen housing, if Figure 1-Figure 8 As shown, the entire device is supported by the support legs 101 and powered by an external power source. Figure 1 As shown, the first spring 704 is in a contracted state, and then a suitable profiling block 501 made according to the structure of the LED transparent protective shell 6 is fixed on the adjustment platform 5 by bolts. When testing, the LED transparent protective shell 6 can be positioned by nesting the profiling block 501, and then the cylinder 8 is controlled to extend to drive the mounting frame 9 to move downward. At this time, the convex gear rod 901 is forced to slide downward, and the meshing transmission between the convex gear rod 901 and the transmission gear 202 can force the rotating shaft 2 and the driving gear 201 to rotate, and then cooperate with the driving gear 201 and the driven gear 202 to rotate. The meshing transmission between 503 can force the rotating rod 502 and the adjusting platform 5 to rotate counterclockwise, and because the number of teeth on the convex gear rod 901 is half of the number of teeth on the transmission gear 202, when the convex tooth block on the convex gear rod 901 is separated from the transmission gear 202, the adjusting platform 5 just rotates 180°, and at this time the protruding end of the adjusting platform 5 just contacts the convex gear rod 901 to achieve the limit of the adjusting platform 5, so that the LED transparent protective shell 6 on the profiling block 501 is just located below the mounting plate 11, and at this time the pressure ball 1101 and the stress sensor 1103 at the lower end of the mounting plate 11 are not in contact with the LED transparent protective shell 6;

[0028] A pressure block 701 is fixed symmetrically on the rear end surface of the movable plate 7, and the pressure block 701 contacts the LED transparent protective shell 6 to achieve a clamping and limiting effect. A vertical rod 702 is fixed on the lower end surface of the movable plate 7, and the vertical rod 702 is slidably connected to the adjustment platform 5, and the vertical rod 702 contacts the elliptical protrusion 102 to slide. A guide rod 703 is fixed on the front end surface of the movable plate 7, and the guide rod 703 is slidably connected to the adjustment platform 5. One end of a first spring 704 is fixed on the front end surface of the movable plate 7, and the other end of the first spring 704 is fixed on the adjustment platform 5.

[0029] When the adjusting platform 5 is forced to rotate counterclockwise, Figure 1-Figure 6 As shown, the rotation of the adjusting platform 5 synchronously drives the movable plate 7 to rotate. At this time, the movable plate 7 can be moved toward the LED transparent protective shell 6 under the elastic action of the first spring 704, and the sliding guiding action between the vertical rod 702 and the adjusting platform 5 can ensure the stability of the movement of the movable plate 7 until the pressing block 701 contacts the LED transparent protective shell 6. At this time, the first spring 704 provides a force for the movable plate 7 and the pressing block 701, which can realize the pressing and fixing effect of the LED transparent protective shell 6 to ensure the stability of the LED transparent protective shell 6. When the processing is completed, the adjusting platform 5 is forced to rotate clockwise to reset. During the process, when the vertical rod 702 contacts the elliptical protrusion 102, the vertical rod 702 slides along the arc edge of the elliptical protrusion 102, so that the vertical rod 702 is forced to move away from the LED transparent protective shell 6, thereby driving the movable plate 7 and the pressing block 701 away from the LED transparent protective shell 6, so that the first spring 704 is forced to contract, thereby realizing the unlocking effect of the LED transparent protective shell 6, which is convenient for the disassembly and assembly of the LED transparent protective shell 6;

[0030] The guide rod 10 is slidably connected to the mounting frame 9, and three guide rods 10 are distributed at equal angles about the center of the mounting frame 9, and one end of the second spring 1001 is fixed on the guide rod 10, and the other end of the second spring 1001 is fixed on the mounting frame 9; a pressure ball 1101 is installed on the lower end surface of the mounting plate 11, and the pressure ball 1101 contacts the LED transparent protective shell 6 and can roll, and a rubber pad 1102 is also fixed on the mounting plate 11, and the thickness of the rubber pad 1102 is 2mm-3mm, and a stress sensor 1103 is fixed on the rubber pad 1102, and the stress sensor 1103 is flush with the end surface of the pressure ball 1101;

[0031] When the adjusting platform 5 is forced to rotate counterclockwise and drive the LED transparent protective shell 6 to rotate to the bottom of the mounting plate 11, Figure 1-Figure 7As shown, at this time, the cylinder 8 continues to extend to drive the mounting frame 9 to move downward, and at this time, the convex tooth block on the convex tooth rod 901 is separated from the transmission gear 202 and no longer meshed. When the mounting frame 9 continues to move downward, it also drives the guide rod 10 and the mounting plate 11 to move downward. When the pressure ball 1101 contacts the stress sensor 1103 LED transparent protective shell 6, the cylinder 8 continues to extend, so that the guide rod 10 is forced to slide, and the second spring 1001 is forced to contract until the elastic action of the second spring 1001 provides a force for the guide rod 10, the mounting plate 11 and the pressure ball 1101, so that the pressure ball 1101 generates a certain pressure on the LED transparent protective shell 6, so that the LED transparent protective shell 6 is deformed. At this time, the stress sensor 1103 can realize the detection of stress when the LED transparent protective shell 6 is deformed;

[0032] In summary, when using the stress detection device of the LED screen housing, if Figure 1-Figure 8As shown, the LED transparent protective shell 6 can be positioned by nesting the LED transparent protective shell 6 with the profiling block 501, and then the mounting frame 9 is driven downward by the cylinder 8, and the transmission action between the convex gear rod 901 and the transmission gear 202 and the transmission action between the driven gear 503 and the driving gear 201 can be coordinated, so that the adjustment platform 5 can drive the LED transparent protective shell 6 to rotate 180° counterclockwise to the bottom of the mounting plate 11, and during the rotation process, the movable plate 7 and the pressing block 70 can be moved by the action of the first spring 704. 1 moves to clamp and fix the LED transparent protective shell 6. At this time, the cylinder 8 drives the mounting frame 9, the guide rod 10 and the mounting plate 11 to continue to move downward. When the pressure ball 1101 contacts the stress sensor 1103 and the LED transparent protective shell 6, the mounting frame 9 and the guide rod 10 continue to move downward, which will cause the second spring 1001 to contract under force. Through the elastic action of the second spring 1001, a force can be provided for the guide rod 10, the mounting plate 11 and the pressure ball 1101, so that the pressure ball 1101 exerts pressure on the LED transparent protective shell 6. When the adjusting table 5 rotates clockwise to reset, when the adjusting table 5 rotates, when the vertical rod 702 contacts the elliptical protrusion 102 and slides along the edge of the elliptical protrusion 102, the movable plate 7 and the pressing block 701 are forced to move away from the LED transparent protective shell 6, so as to realize the automatic unlocking of the LED transparent protective shell 6 and facilitate the disassembly and assembly of the LED transparent protective shell 6. At this time, the first spring 704 is forced to shrink so as to facilitate the next detection. During the use of the whole device, the profiling block 501 can facilitate the positioning of the LED transparent protective shell 6, and the self-locking mechanism can realize the automatic fixing and unlocking of the LED transparent protective shell 6, without other fixings, and the operation is convenient and simple, which can greatly improve the detection efficiency. This is the working principle of the stress detection device of the LED screen shell.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stress detection device for an LED screen housing, comprising a workbench (1) and a top plate (4), characterized in that: One end of a vertical rod (3) is vertically fixed to the upper end surface of the workbench (1), and the other end of the vertical rod (3) is fixed to the top plate (4). An adjustment platform (5) is arranged above the workbench (1), and an LED transparent protective shell (6) is installed on the adjustment platform (5). A movable plate (7) is also arranged on the adjustment platform (5). A cylinder (8) is fixed to the lower end surface of the top plate (4). A pressure block (701) is symmetrically fixed to the rear end surface of the movable plate (7), and the pressure block (701) can achieve a clamping and limiting effect by contacting with the LED transparent protective shell (6). A vertical rod (702) is fixed to the lower end surface of the movable plate (7), and the vertical rod (702) and the adjustment platform (5) are slidably connected, and the vertical rod (702) can slide by contacting with the elliptical protrusion (102). A guide rod (703) is fixed to the front end surface of the movable plate (7), and the guide rod ( The movable plate (703) is slidably connected to the adjusting platform (5), one end of the first spring (704) is fixed to the front end surface of the movable plate (7), and the other end of the first spring (704) is fixed to the adjusting platform (5). The adjusting platform (5) rotates synchronously to drive the movable plate (7) to rotate. At this time, under the elastic action of the first spring (704), the movable plate (7) can be moved toward the LED transparent protective shell (6) until the pressing block (701) contacts the LED transparent protective shell (6). At this time, the first spring (704) provides a force for the movable plate (7) and the pressing block (701), so as to achieve the pressing and fixing effect of the LED transparent protective shell (6). When the adjusting platform (5) is forced to rotate clockwise to reset, when the vertical rod (702) contacts the elliptical protrusion (102), the movable plate (7) and the pressing block (701) are away from the LED transparent protective shell (6).

2. The stress detection device for a LED screen housing according to claim 1, characterized in that: The lower end surface of the workbench (1) is evenly fixed with supporting feet (101), and the upper end surface of the workbench (1) is fixed with an elliptical convex block (102), and the elliptical convex block (102) is located below the adjustment platform (5), and the lower end surface of the workbench (1) is also fixed with a fixing plate (103).

3. The stress detection device for a LED screen housing according to claim 2, characterized in that: The bearing on the fixed plate (103) is connected to the rotating shaft (2), and a driving gear (201) is fixed at the front end of the rotating shaft (2), and a transmission gear (202) is fixed at the rear end of the rotating shaft (2), and the rotating shaft (2) rotates at an angle of 180 degrees each time.

4. The stress detection device for a LED screen housing according to claim 1, characterized in that: The vertical rods (3) are symmetrically distributed about the center line of the workbench (1), and four vertical rods (3) are provided.

5. The stress detection device for a LED screen housing according to claim 3, characterized in that: A profiling block (501) is fixed to the adjusting platform (5) by bolts, and a rotating rod (502) is fixed to the lower end of the adjusting platform (5), and the rotating rod (502) is connected to the working platform (1) by a bearing, and a driven gear (503) is fixed to the lower end of the rotating rod (502) passing through the working platform (1), and the driven gear (503) is meshed with the driving gear (201) to realize transmission.

6. The stress detection device for a LED screen housing according to claim 5, characterized in that: The profiling block (501) is made of rubber material, and the profiling block (501) and the LED transparent protective shell (6) are nested and connected, and the maximum distance between the profiling block (501) and the movable plate (7) is greater than the width of the LED transparent protective shell (6).

7. The stress detection device for a LED screen housing according to claim 2, characterized in that: A mounting frame (9) is fixed to the output end of the cylinder (8), and the mounting frame (9) is arranged above the rear side of the adjustment platform (5). A guide rod (10) is connected to the mounting frame (9), and a mounting plate (11) is fixed to the guide rod (10).

8. The stress detection device for a LED screen housing according to claim 3, characterized in that: A convex toothed rod (901) is also fixed on the mounting frame (9), and the convex toothed rod (901) penetrates the workbench (1) and can slide, and the convex toothed rod (901) meshes with the transmission gear (202) to achieve a transmission effect, and the number of teeth on the convex toothed rod (901) is half the number of teeth on the transmission gear (202), and the convex toothed rod (901) contacts the adjustment platform (5) to achieve a limiting effect.

9. The stress detection device for a LED screen housing according to claim 1, characterized in that: The guide rod (10) is slidably connected to the mounting frame (9), and three guide rods (10) are distributed at equal angles with respect to the center of the mounting frame (9). One end of a second spring (1001) is fixed to the guide rod (10), and the other end of the second spring (1001) is fixed to the mounting frame (9).

10. The stress detection device for a LED screen housing according to claim 1, characterized in that: A pressure ball (1101) is mounted on the lower end surface of the mounting plate (11), and the pressure ball (1101) contacts the LED transparent protective shell (6) and can roll. A rubber pad (1102) is also fixed on the mounting plate (11), and the thickness of the rubber pad (1102) is 2 mm to 3 mm. A stress sensor (1103) is fixed on the rubber pad (1102), and the stress sensor (1103) is flush with the end surface of the pressure ball (1101).

Images