Arc-shaped LED display screen with spliced front maintenance bottom shell

Abstract

The utility model provides a front maintenance bottom shell spliced arc-shaped LED display screen, which comprises an arc-shaped box body and an LED module arranged on the arc-shaped box body, the arc-shaped box body comprises an arc surface, the arc surface is divided into a plurality of mounting areas, the mounting areas are thin and long planes, and the LED module is arranged on the arc-shaped box body. The plurality of mounting areas are arranged on the cambered surface in an array and are closely distributed, the plurality of LED modules correspond to the mounting areas in number, and the plurality of LED modules are arranged in the plurality of mounting areas in a one-to-one correspondence manner; the LED module comprises a front maintenance bottom shell, a PCB arranged on the front maintenance bottom shell, an LED lamp electrically connected to the PCB and a mask arranged on the LED lamp in a sleeving mode, the front maintenance bottom shell is a long and thin flat plate corresponding to the installation area, and the front maintenance bottom shell is detachably connected to the installation area. The front maintenance bottom shell has the advantages that different curvatures can be spliced through the front maintenance bottom shell, and the production and installation cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of LED display screen especially relates to a front maintenance bottom shell spliced arc LED display screen. BACKGROUND

[0002] In the modern information display field, LED display screen becomes the important tool of modern information dissemination, advertisement display, stage effect and the like field with its excellent performance and wide application scene. The excellent performance of LED display screen cannot leave its behind key technology and component part, wherein, the appearance of LED front maintenance bottom shell technology, the design original intention of LED front maintenance bottom shell is to solve the maintenance problem of traditional rear maintenance display screen in the space limited environment.

[0003] In addition, on the basis that the traditional rectangular display screen gradually meets the conventional demand, the arc LED display screen gradually becomes one of the important trends of new generation display technology with its unique visual effect and space adaptability.

[0004] The arc LED display screen in the prior art, for example, the invention involved in the authorized publication no. CN100468488C, relates to the arc LED display screen, including the arc support, the arc support is provided with a plurality of arc LED dot matrix module unit boards of same shape, a plurality of arc LED dot matrix module unit boards are arranged in ring shape, the bottom surface of arc LED dot matrix module unit board is plane, the outer surface is arc surface, arc LED dot matrix module unit board is composed of arc surface LED dot matrix module, each arc surface LED dot matrix module is composed of the plate shell with reflection hole, circuit board, LED lamp or chip, the shape of its plate shell is arc body, the shape of circuit board is plane board.

[0005] However, the arc LED display screen in the prior art needs to adopt a set of plate shell of the curvature under one curvature, and needs to produce plate shell of different curvatures for different curvatures, and the height of LED lamp in each arc surface LED dot matrix module is different, therefore, the precision requirement is high, and the production and installation cost is high. UTILITY MODEL CONTENTS

[0006] In order to improve the problems of high precision requirement, high production and installation cost of the prior art, the utility model provides an arc LED display screen capable of being spliced by using the same front maintenance bottom shell under different curvatures.

[0007] The utility model provides a front maintenance bottom shell spliced arc LED display screen adopts the following technical scheme:

[0008] The application discloses a front-maintenance bottom shell spliced arc-shaped LED display screen, which comprises an arc-shaped box body and LED modules arranged on the arc-shaped box body.

[0009] The LED module comprises a front-maintenance bottom shell, a PCB board arranged on the front-maintenance bottom shell, LED lamps electrically connected to the PCB board and a mask sleeved on the LED lamps, the front-maintenance bottom shell is an elongated plate corresponding to the installation area, and the front-maintenance bottom shell is detachably connected to the installation area.

[0010] According to the technical scheme, the front-maintenance bottom shells are connected to the installation areas one by one, and the LED modules are assembled, so that arc surfaces with different curvatures are spliced according to the arc-shaped box bodies with different curvatures, the LED screen with different curvatures is formed, the fluency of the arc surface depends on the overall width of the LED module, the smaller the overall width of the LED module is, the higher the fluency of the arc surface is, different widths can be selected according to actual production needs, flexibility is improved, effect diversification is realized, and the same LED module can be used under different curvatures. Since the plane is easier to manufacture than the curved surface, the PCB board is a plate, uniform LED lamps can be assembled, the controllability of the precision is high, and production and manufacturing costs are reduced.

[0011] Preferably, the front-maintenance bottom shell is made of PC+GF15% material.

[0012] According to the technical scheme, the PC+GF15% has high mechanical strength, impact resistance and better wear resistance, ensures excellent stability and durability of the bottom shell during transportation, installation and use, the PC+GF15% material has good thermal stability, is favorable for resisting high-temperature environments, in addition, the anti-ultraviolet property of the PC+GF15% material is favorable for preventing discoloration, aging or embrittlement.

[0013] Preferably, the front-maintenance bottom shell is provided with a positioning column, the installation area is provided with a positioning hole corresponding to the positioning column, and the positioning hole and the positioning column are matched with each other.

[0014] According to the technical scheme, when the front-maintenance bottom shell is installed, the positioning column is inserted into the positioning hole, so that the front-maintenance bottom shell can be quickly positioned, and the front-maintenance bottom shell is ensured to be installed in the corresponding installation area.

[0015] Preferably, the front maintenance bottom shell is provided with a plurality of inner reinforcing ribs arranged in a longitudinal and transverse staggered manner, and the back surface of the front maintenance bottom shell is provided with a plurality of outer reinforcing ribs arranged in a staggered manner.

[0016] According to the above technical solution, the front maintenance bottom shell is small in width and easy to be bent and deformed by external force. The inner reinforcing ribs are beneficial to enhance the overall structural strength. The plurality of inner reinforcing ribs are arranged in a longitudinal and transverse staggered manner, which can disperse the stress in the transverse and longitudinal directions to avoid the bending of the front maintenance bottom shell. The outer reinforcing ribs further enhance the structural strength of the bottom plate. The outer reinforcing ribs can disperse the stress in the inclined direction. Therefore, the inner reinforcing ribs and the outer reinforcing ribs can effectively improve the structural strength, durability and stability of the front maintenance bottom shell.

[0017] Preferably, the LED module further comprises a fixing bolt, the front surface of the front maintenance bottom shell is provided with a stud, the PCB plate is provided with a through hole corresponding to the stud, the through hole and the stud are matched with each other, the through hole penetrates the inner and outer surfaces of the PCB plate, and the face cover is provided with a through hole matched with the stud.

[0018] According to the above technical solution, during installation, the insertion part of the stud is inserted into the through hole and the through hole, and the PCB plate and the face cover are installed on the bottom shell body. The fixing bolt and the fixing screw hole are matched, so that the PCB plate and the face cover can be fixed.

[0019] Preferably, the front maintenance bottom shell is provided with a side wall reinforcing rib, the PCB plate is provided with a positioning groove corresponding to the side wall reinforcing rib, and the cross-sectional shape of the positioning groove and the side wall reinforcing rib is matched with each other.

[0020] According to the above technical solution, the side wall reinforcing rib is beneficial to increase the structural strength of the wall of the front maintenance bottom shell. When the PCB plate is installed on the front maintenance bottom shell, the contact area of the PCB plate and the front maintenance bottom shell can be increased, and the PCB plate can be prevented from falling off.

[0021] Preferably, the front maintenance bottom shell is integrally formed with a mounting seat, the mounting seat is provided with an electrical connection port, the electrical connection port penetrates the front maintenance bottom shell, the mounting seat is provided with a connection cover for opening or closing the electrical connection port, the connection cover covers the mounting seat, the connection cover is detachably connected to the mounting seat, the connection cover is provided with a wire outlet, and the wire outlet faces downward.

[0022] According to the above technical solution, during installation, when the external power device is electrically connected with the PCB plate, the connection cover is connected to the mounting seat, so that the external power device and the PCB plate are electrically connected through the wire outlet, and the connection cover has a waterproof and dustproof effect.

[0023] Preferably, the mounting base is provided with a waterproof slot, the waterproof slot is arranged on the electric connection port, a waterproof ring is arranged in the waterproof slot, and the waterproof ring and the waterproof slot are matched with each other.

[0024] Through the technical scheme, the waterproof ring is used for preventing water from entering the electric connection port from between the connecting cover and the mounting base, and further waterproof effect is achieved, so that the mounting base is suitable for outdoor or humid environment.

[0025] Compared with the prior art, the mounting base has the following beneficial effects:

[0026] According to the embodiment of the present application, the arc-shaped box body with different curvatures is spliced with the arc surface with different curvatures, the LED screen with different curvatures is formed, the fluency of the arc surface depends on the overall width of the LED module, the smaller the overall width of the LED module is, the higher the fluency of the arc surface is, different widths can be selected according to actual production needs, so that flexibility is improved, effect diversification is realized, and the same LED module can be used under different curvatures.

[0027] Since the plane is easier to manufacture than the curved surface, and the PCB is a flat plate, the LED lamp with uniform specifications can be assembled, the precision controllability is high, and the production and manufacturing cost is reduced.

[0028] The inner reinforcing ribs are beneficial to enhancing the overall structural strength, the inner reinforcing ribs are longitudinally and transversely intersected, stress can be dispersed in the transverse and longitudinal directions, the front maintenance bottom shell is prevented from being bent, the outer reinforcing ribs further enhance the structural strength of the bottom plate, the outer reinforcing ribs can disperse stress in the inclined direction, therefore, the inner reinforcing ribs and the outer reinforcing ribs jointly act to effectively improve the structural strength, durability and stability of the front maintenance bottom shell. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 is a schematic view of the overall structure of the embodiment of the present application.

[0031] Figure 2 is a schematic view of the LED module structure in the embodiment of the present application.

[0032] Figure 3 is Figure 2 is an enlarged view of A in FIG.

[0033] Figure 4 is a schematic view of the structure of the outer reinforcing rib in the embodiment of the present application.

[0034] Figure 5 It is the relation explosion map of the connecting cover, the waterproof ring and the mounting seat of the embodiment of the utility model.

[0035] Among them, the part number explanation is: 1, arc-shaped box; 11, arc surface; 12, plane; 2, LED module; 21, front maintenance bottom shell; 22, PCB board; 23, mask; 24, alignment column; 25, inner reinforcing rib; 26, outer reinforcing rib; 27, stud; 271, support part; 272, plug-in part; 28, side wall reinforcing rib; 29, mounting seat; 30, connecting cover; 31, waterproof ring; 3, mounting area; 4, alignment hole; 5, through hole; 6, fixing screw hole; 7, alignment groove; 8, electrical connection port; 9, wire inlet and outlet; 10, waterproof slot. DETAILED DESCRIPTION

[0036] The utility model embodiments will be described below with reference to the accompanying drawings. Figures 1 to 5 The technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0037] A front maintenance bottom shell spliced arc-shaped LED display screen, referring to Figure 1 And Figure 2 , including arc-shaped box 1, LED module 2 arranged on the arc-shaped box. The arc-shaped box 1 is long strip-shaped and along the vertical direction, and the arc-shaped box 1 includes arc surface 11 and plane 12. The arc surface 11 of the arc-shaped box 1 is divided into a plurality of mounting areas 3, and the mounting area 3 is an elongated rectangular plane 12, and the plurality of mounting areas 3 are arrayed on the arc surface 11 and are closely distributed. The LED module 2 is provided with a plurality of corresponding mounting areas 3, and the plurality of LED modules 2 are one-to-one corresponding to the plurality of mounting areas 3, that is, when the plurality of LED modules 2 are installed on the arc surface 11, the plurality of LED modules 2 are arc-shaped, and the plurality of LED modules 2 completely cover the arc surface 11.

[0038] Specifically, referring to Figure 2 And Figure 3 , the LED module 2 includes front maintenance bottom shell 21, PCB board 22, LED lamp and mask 23.

[0039] Referring to Figure 2 And Figure 3, the front maintenance bottom shell 21 corresponds to the mounting area 3 in an elongated rectangular shape, and the front maintenance bottom shell 21 is a flat plate, that is, the width of the front maintenance bottom shell 21 is small. The front maintenance bottom shell 21 is a front maintenance bottom shell 21 made of PC+GF15% material, which has high mechanical strength, impact resistance and better wear resistance, ensuring excellent stability and durability of the bottom shell during transportation, installation and use, and the PC+GF15% material has good thermal stability, which is beneficial to resist high temperature environment, in addition, the anti-ultraviolet properties of the PC+GF15% material are beneficial to prevent discoloration, aging or embrittlement. The front maintenance bottom shell 21 is detachably connected to the mounting area 3 by bolts, so as to connect the front maintenance bottom shell 21 and the mounting area 3 by bolts.

[0040] Referring to Figure 2 With Figure 4 , the back of the front maintenance bottom shell 21 is provided with a positioning column 24, which is in the shape of a cylinder, and the positioning column 24 is distributed along the thickness direction of the front maintenance bottom shell 21. The mounting area 3 corresponds to the positioning hole 4, which is circular, and the positioning hole 4 and the positioning column 24 are matched with each other. When installing the front maintenance bottom shell 21, the positioning column 24 is inserted into the positioning hole 4, so that the front maintenance bottom shell 21 can be quickly positioned, ensuring that the front maintenance bottom shell 21 is installed in the corresponding mounting area 3. The positioning column 24 is provided with two, and the two positioning columns 24 are arranged along the length direction of the front maintenance bottom shell 21. The positioning hole 4 corresponds to the number of positioning columns 24 and is provided with two, and the two positioning columns 24 are one-to-one matched with the two positioning holes 4. The two positioning columns 24 make the front maintenance bottom shell 21 stable after positioning, make the front maintenance bottom shell 21 distributed along the vertical direction, and prevent shaking.

[0041] When installing, referring to Figure 2 With Figure 4 , by aligning and inserting the two positioning columns 24 one by one into the two positioning holes 4, the front maintenance bottom shell 21 is distributed along the vertical direction, preventing shaking, and the front maintenance bottom shell 21 is connected with the mounting area 3 by bolts, so as to install the front maintenance bottom shell 21 in the corresponding mounting area 3.

[0042] Referring to Figure 3 With Figure 4The front of the front maintenance bottom shell 21 is provided with inner reinforcing ribs 25, which are integrally formed with the front maintenance bottom shell 21. Several inner reinforcing ribs 25 are provided, and they are distributed in a crisscross pattern. Because the front maintenance bottom shell 21 is relatively narrow, it is easily bent and deformed by external forces. The inner reinforcing ribs 25 help to enhance the overall structural strength. The crisscrossing of the inner reinforcing ribs 25 can distribute the force in the lateral and longitudinal directions, preventing the front maintenance bottom shell 21 from bending. The back of the front maintenance bottom shell 21 is provided with outer reinforcing ribs 26, which are also integrally formed with the front maintenance bottom shell 21. Several outer reinforcing ribs 26 are provided, and they are distributed in a cross pattern. The outer reinforcing ribs 26 further enhance the structural strength of the bottom plate, and they can further distribute the force in the inclined direction. Therefore, the combined effect of the inner reinforcing ribs 25 and the outer reinforcing ribs 26 can effectively improve the structural strength, durability, and stability of the front maintenance bottom shell 21.

[0043] Reference Figure 3 The front maintenance base 21 has studs 27 on its front side, distributed along the thickness direction of the front maintenance base 21. Several studs 27 are provided, and both the studs 27 and the front maintenance base 21 are integrally formed. Each stud 27 includes a cylindrical support portion 271 and a connector portion 272, both distributed along the thickness direction of the front maintenance base 21. One end of the support portion 271 is connected to one end of the connector portion 272. The support portion 271, facing away from the connector portion 272, is connected to the front maintenance base 21. The diameter of the connector portion 272 is smaller than the diameter of the support portion 271, and the connector portion 272 and the support portion 271 are on the same central axis, forming a stepped shape.

[0044] Reference Figure 2 and Figure 3 The PCB board 22 is rectangular and flat, and is distributed along the length of the front maintenance base 21. The PCB board 22 is electrically connected to the LED lights; that is, the LED lights are mounted on the PCB board 22. Because the PCB board 22 is flat, LED lights of uniform specifications can be used, facilitating assembly. The PCB board 22 has through holes 5 corresponding to the insertion parts 272. The through holes 5 are circular and fit with the insertion parts 272. The through holes 5 penetrate the inner and outer surfaces of the PCB board 22. When the insertion part 272 passes through the through hole 5, the support part 271 limits the PCB board 22. Several through holes 5 are provided corresponding to the number of studs 27, with each through hole 5 corresponding to one of the insertion parts 272 of the studs 27, thus facilitating the installation of the PCB board 22 onto the base body.

[0045] In addition, refer to Figure 1 and Figure 3The inner side wall of the front maintenance bottom shell 21 is provided with a side wall reinforcing rib 28. The side wall reinforcing rib 28 is in a long strip shape, and the cross section of the inner side wall is semicircular. The side wall reinforcing rib 28 is distributed along the thickness direction of the front maintenance bottom plate. The side wall reinforcing rib 28 is provided with a plurality of side wall reinforcing ribs 28. The plurality of side wall reinforcing ribs 28 are divided into four groups. The four groups of side wall reinforcing ribs 28 are one-to-one corresponding to the four side walls of the front maintenance bottom shell 21. The distance between the adjacent two side wall reinforcing ribs 28 in each group is the same. Therefore, the structural strength of the wall of the front maintenance bottom shell 21 is increased. The PCB board 22 is provided with a positioning groove 7 corresponding to the side wall reinforcing rib 28. The cross-sectional shape of the positioning groove 7 and the side wall reinforcing rib 28 is adapted to each other. The positioning groove 7 is provided with a plurality of positioning grooves 7 corresponding to the side wall reinforcing rib 28. The plurality of side wall reinforcing ribs 28 are one-to-one corresponding to the plurality of side wall reinforcing ribs 28. Therefore, when the PCB board 22 is installed on the front maintenance bottom shell 21, the contact area between the PCB board 22 and the front maintenance bottom shell 21 is increased, and the PCB board 22 is prevented from falling off.

[0046] Referring to Figure 2 With Figure 3 The mask 23 corresponding to the front maintenance bottom shell 21 is also in a rectangular shape. The mask 23 is away from the front maintenance bottom shell 21. The mask 23 is sleeved on the LED lamp. The mask 23 is provided with a through hole corresponding to the plug-in part 272. The plug-in part 272 penetrates through the PCB board 22 and the mask 23. The mask 23 is beneficial to protect the LED lamp and improve the display contrast. The through hole is also provided with a plurality of through holes corresponding to the number of studs 27. The plurality of through holes are one-to-one corresponding to the plurality of plug-in parts 272. Therefore, the mask 23 is conveniently installed on the front maintenance bottom shell 21.

[0047] In addition, the LED module 2 also includes a fixing bolt. Referring to Figure 3 The plug-in part 272 is provided with a fixing hole 6 threadedly matched with the fixing bolt. During installation, the plug-in part 272 of the stud 27 is inserted into the through hole 5 and the through hole. The PCB board 22 and the mask 23 are installed on the bottom shell body. The fixing bolt is matched with the fixing hole 6. The PCB board 22 and the mask 23 can be fixed.

[0048] Referring to Figure 4 With Figure 5The mounting seat 29 is provided with an electric connection port 8, and the electric connection port 8 penetrates the front maintenance bottom shell 21. The electric connection port 8 is used for electrically connecting the external power device and the PCB 22. The mounting seat 29 is provided with a connecting cover 30. The connecting cover 30 is used for opening or closing the electric connection port 8. The connecting cover 30 is matched with the mounting seat 29. The connecting cover 30 is covered on the mounting seat 29. The connecting cover 30 is detachably connected to the mounting seat 29 through bolts. The connecting cover 30 is provided with a wire outlet 9, and the wire outlet 9 faces downward. Thus, the external power device and the PCB 22 are electrically connected through the wire outlet 9, and the connecting cover 30 is used for waterproof and dustproof. During installation, when the external power device and the PCB 22 are electrically connected, the connecting cover 30 is connected to the mounting seat 29, and the waterproof and dustproof effect is achieved.

[0049] In addition, referring to Figure 4 With Figure 5 The mounting seat 29 is provided with a waterproof slot 10. The waterproof slot 10 is in a square box shape, and the waterproof slot 10 is arranged in the electric connection port 8. The waterproof slot 10 is provided with a waterproof ring 31, and the waterproof ring 31 is matched with the waterproof slot 10. The waterproof ring 31 is used for preventing water from entering the electric connection port 8 from between the connecting cover 30 and the mounting seat 29, and further plays a waterproof role, so as to be suitable for outdoor or humid environment.

[0050] The implementation principle of the application is as follows: during installation, the two alignment columns 24 are aligned one by one and inserted into the two alignment holes 4, so that the front maintenance bottom shell 21 is distributed in the vertical direction, and the front maintenance bottom shell 21 is prevented from shaking. The front maintenance bottom shell 21 is connected to the mounting area 3 through bolts, so that the front maintenance bottom shell 21 is installed in the corresponding mounting area 3. The insertion part 272 of the stud 27 is inserted into the through hole 5 and the through hole, and the PCB 22 and the mask 23 are installed on the bottom shell body. The PCB 22 and the mask 23 are fixed through the cooperation of the fixing bolt and the fixing screw hole 6. When the external power device and the PCB 22 are electrically connected, the connecting cover 30 is connected to the mounting seat 29, and the waterproof and dustproof effect is achieved. The waterproof ring 31 further prevents water from entering the electric connection port 8 from between the connecting cover 30 and the mounting seat 29.

[0051] When the arc surfaces 11 with different curvatures are spliced, the LED screens with different curvatures can be formed by splicing the arc-shaped boxes 1 with different curvatures, thereby improving flexibility and enabling the same LED module 2 to be used under different curvatures. In addition, the smoothness of the arc surface 11 depends on the overall width of the LED module 2, and the smaller the overall width of the LED module 2, the higher the smoothness of the arc surface 11. Different widths can be selected according to actual production needs to achieve diversified effects. Since the plane 12 is easier to manufacture than the curved surface, and the PCB board 22 is a flat plate, a uniform specification LED lamp can be used for assembly, the precision is controllable, and production and manufacturing costs are reduced.

[0052] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements shall be encompassed within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A circular arc-shaped LED display screen with a front-maintenance bottom shell splicing, characterized in that: The utility model relates to an arc box (1), LED module (2) set up on the arc box (1), the arc box (1) includes camber (11), the camber (11) is divided and has several installation areas (3), the installation area (3) is the plane (12) of elongated, several installation areas (3) are arrayed and are closely distributed on camber (11), the LED module (2) is provided with several corresponding installation area (3) number, several LED module (2) are set up in one to one corresponding several installation areas (3). The LED module (2) includes front maintenance bottom shell (21), the PCB board (22) of front maintenance bottom shell (21) is set up, the LED lamp of electric connection in the PCB board (22) and the face shield (23) of the sleeve set up in the LED lamp, front maintenance bottom shell (21) corresponding installation area (3) is the plate of elongated, front maintenance bottom shell (21) can be connected to installation area (3) in detachable.

2. The arc-shaped LED display screen of claim 1, wherein: The front maintenance bottom shell (21) is made of PC+GF15% material. 3.The arc-shaped LED display screen of a front-maintenance bottom shell splicing according to claim 1, characterized in that: The front maintenance bottom shell (21) is provided with a positioning column (24), and the installation area (3) is provided with a positioning hole (4) corresponding to the positioning column (24).

4. The arc-shaped LED display screen of claim 1, wherein: The front surface of the front maintenance bottom shell (21) is provided with a plurality of inner reinforcing ribs (25), and the plurality of inner reinforcing ribs (25) are distributed in a longitudinal and transverse interlaced manner.

5. The arc-shaped LED display screen of claim 1, wherein: The LED module (2) further comprises a fixing bolt, the front surface of the front maintenance bottom shell (21) is provided with a threaded stud (27), the PCB board (22) is provided with a through hole (5) corresponding to the threaded stud (27), the through hole (5) and the threaded stud (27) are matched with each other, the through hole (5) penetrates the inner and outer surfaces of the PCB board (22), and the face shield (23) is provided with a perforation hole matched with the threaded stud (27); the threaded stud (27) is provided with a fixing screw hole (6) matched with the fixing bolt in a threaded manner.

6. The arc-shaped LED display screen of claim 1, wherein: The front maintenance bottom shell (21) is provided with a side wall reinforcing rib (28), the PCB board (22) is provided with a positioning groove (7) corresponding to the side wall reinforcing rib (28), and the positioning groove (7) and the side wall reinforcing rib (28) are matched with each other in cross-sectional shape.

7. The arc-shaped LED display screen of claim 1, wherein: The front maintenance bottom shell (21) is integrally formed with a mounting seat (29), the mounting seat (29) is provided with an electrical connection port (8), the electrical connection port (8) penetrates the front maintenance bottom shell (21), the mounting seat (29) is provided with a connecting cover (30) used for opening or closing the electrical connection port (8), the connecting cover (30) covers the mounting seat (29), the connecting cover (30) can be detachably connected to the mounting seat (29), and the connecting cover (30) is provided with a wire access port (9) facing downward.

8. The arc-shaped LED display screen of claim 7, wherein: The waterproof slot (10) is arranged on the mounting seat (29), and the waterproof slot (10) is arranged on the electric connection port (8). The waterproof ring (31) is arranged in the waterproof slot (10), and the waterproof ring (31) and the waterproof slot (10) are matched with each other.

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