LED display screen

Abstract

This invention provides an LED display screen, comprising a housing, a power supply box, a display module, and a sealing assembly. Electrical components within the power supply box are electrically connected to the display module via connecting wires passing through a first wiring hole. The sealing assembly includes: a sealing frame disposed at the first wiring hole, the sealing frame having a second wiring hole to avoid the connecting wires, and a floating gap between the sealing frame and the power supply box; a first elastic sealing ring disposed on the sealing frame and surrounding the second wiring hole, the display module being connected to the sealing frame and abutting against the first elastic sealing ring; and a second elastic sealing ring, the outer side of the second elastic sealing ring connected to the power supply box, and the inner side of the second elastic sealing ring connected to the sealing frame and surrounding the second wiring hole, the second elastic sealing ring supporting the sealing frame to allow the sealing frame to float relative to the power supply box. The technical solution provided in this application solves the problem of water leakage due to sealing ring failure in related technologies.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of LED display screen, in particular to an LED display screen. BACKGROUND

[0002] LED display screen has been widely used in stage, commercial performance, advertisement, exhibition and other industries, and has excellent display effect. The demand for outdoor LED display screen is increasing. Although the outdoor LED display screen has certain waterproof capability, the waterproof effect is poor, and rainwater can easily enter the power box through the opening of the power box for wiring with the display module, causing the circuit board in the power box to short circuit, and further causing the LED display screen to be scrapped.

[0003] In the related art, a sealing ring is arranged between the display module and the power box, and the compression deformation of the sealing ring enables the display module and the power box to be sealed and waterproof. However, the sealing ring in the related art still has the risk of water leakage due to failure. SUMMARY

[0004] The present application provides an LED display screen to solve the problem of the risk of water leakage due to failure of the sealing ring in the related art.

[0005] The present application provides an LED display screen, which comprises a box body, a power box, a display module and a sealing assembly. The power box and the display module are arranged on the box body. The power box has a first wiring hole. An electrical device in the power box is electrically connected to the display module through a connecting line arranged in the first wiring hole. The sealing assembly comprises: a sealing frame arranged at the first wiring hole, the sealing frame having a second wiring hole for avoiding the connecting line, and a floating gap between the sealing frame and the power box; a first elastic sealing ring arranged on the sealing frame and surrounding the second wiring hole, the display module being connected to the sealing frame and abutting against the first elastic sealing ring to seal the connection between the display module and the sealing frame; and a second elastic sealing ring, the outer side of the second elastic sealing ring being connected to the power box, and the inner side of the second elastic sealing ring being connected to the sealing frame and surrounding the second wiring hole to seal the floating gap, the sealing frame being supported by the second elastic sealing ring to be arranged floatingly relative to the power box.

[0006] Further, the second elastic sealing ring comprises a first connecting segment, a first deformed segment and a second connecting segment connected in sequence from the outside to the inside, the first connecting segment, the first deformed segment and the second connecting segment all being annular, the first connecting segment being connected to the power box, the second connecting segment being connected to the sealing frame and located outside the second wiring hole, and at least part of the longitudinal section of the first deformed segment being in arc-shaped structure.

[0007] Further, the entire longitudinal section of the first deformed segment is in arc-shaped structure, and the middle part of the first deformed segment protrudes towards the direction away from the sealing frame.

[0008] Further, the sealing assembly further comprises: a first annular pressing plate connected with the power box, the first connecting segment being clamped between the first annular pressing plate and the power box; and / or a second annular pressing plate connected with the sealing frame, the second connecting segment being clamped between the second annular pressing plate and the sealing frame.

[0009] Further, the sealing frame comprises a base and a first connecting cylinder arranged on the base, an inner space of the first connecting cylinder forming a second wire hole, the display module having a second connecting cylinder, the first connecting cylinder and the second connecting cylinder being insertedly matched, the first elastic sealing ring being clamped between the first connecting cylinder and the second connecting cylinder in a radial direction of the second wire hole.

[0010] Further, the first elastic sealing ring comprises a third connecting segment, a second deformation segment and a fourth connecting segment connected in sequence along an axial direction of the second wire hole, the third connecting segment, the second deformation segment and the fourth connecting segment all being annular, the third connecting segment and the fourth connecting segment both abutting against a cylinder wall of the first connecting cylinder, the second deformation segment protruding from the third connecting segment and the fourth connecting segment in a radial direction of the second wire hole, the second deformation segment abutting against a cylinder wall of the second connecting cylinder, wherein at least part of a longitudinal section of the second deformation segment is in a wave shape.

[0011] Further, a limiting structure is arranged between the sealing frame and the power box to limit a moving stroke of the sealing frame when floating relative to the power box.

[0012] Further, the limiting structure comprises a limiting cylinder arranged on a bottom wall of the sealing frame and surrounding the second wire hole, the limiting cylinder extending downward into the first wire hole, the floating gap comprising a transverse floating gap formed between the limiting cylinder and a hole wall of the first wire hole.

[0013] Further, an inner side of the second elastic sealing ring is connected with the bottom wall of the sealing frame and located at an inner side of the limiting cylinder, and an outer side of the second elastic sealing ring is connected with an inner surface of a top wall of the power box.

[0014] Further, the limiting structure further comprises: an annular limiting plate arranged on a side wall of the sealing frame and surrounding the second wire hole, the limiting cylinder extending upward to a lower surface of the annular limiting plate; and an annular boss arranged on an outer surface of the top wall of the power box, the annular boss surrounding the first wire hole, the floating gap further comprising a longitudinal floating gap formed between the lower surface of the annular limiting plate and an upper surface of the annular boss.

[0015] The LED display screen provided by the technical scheme of the present application comprises a box body, a power supply box, a display module and a sealing assembly, the connecting position of the display module and the sealing frame is sealed by a first elastic sealing ring, the connecting position of the sealing frame and the display module is sealed by a second elastic sealing ring, rainwater is prevented from entering the power supply box through the first wire hole or the second wire hole, and internal circuit short circuit and scrapping of the power supply box are avoided. Since the sealing frame and the power supply box have a floating gap, the sealing frame is supported by the second elastic sealing ring, when position deviation occurs between the display module and the power supply box, the elastic deformation of the second elastic sealing ring is utilized to make the sealing frame float relative to the power supply box, the position deviation between the display module and the power supply box is eliminated, the position deviation between the sealing frame and the display module is reduced, the compression deformation amount of the first elastic sealing ring in the circumferential direction is uniformly distributed, the use reliability of the sealing assembly is improved, the internal circuit short circuit caused by water entering the power supply box is avoided, and the service life and use safety of the LED display screen are improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the description of the present application, serve to explain the present application. In the drawings:

[0017] Figure 1 A structure schematic diagram of an LED display screen provided by an embodiment of the present application is shown;

[0018] Figure 2 An exploded view of the LED display screen provided by the embodiment of the present application is shown;

[0019] Figure 3 An exploded view of a sealing assembly of the LED display screen provided by the embodiment of the present application is shown;

[0020] Figure 4 A sectional view of the LED display screen provided by the embodiment of the present application is shown;

[0021] Figure 5 A sectional view of the LED display screen provided by the embodiment of the present application is shown; Figure 4 A partial enlarged view of position A in FIG. 8 is shown;

[0022] Figure 6 Another sectional view of the LED display screen provided by the embodiment of the present application is shown;

[0023] Figure 7 A partial enlarged view of position B in FIG. 9 is shown. Figure 6

[0024] In the above drawings, the following reference signs are used:

[0025] 10, box body; 20, power supply box; 21, first wire hole; 30, display module; 31, second connecting cylinder;​

[0026] 40. Sealing assembly; 41. Sealing frame; 411. Second wiring hole; 412. Base; 413. First connecting cylinder; 42. First elastic sealing ring; 421. Third connecting section; 422. Second deformable section; 423. Fourth connecting section; 43. Second elastic sealing ring; 431. First connecting section; 432. First deformable section; 433. Second connecting section; 44. First annular pressure plate; 45. Second annular pressure plate;

[0027] 50. Limiting structure; 51. Limiting cylinder; 53. Annular limiting plate; 54. Annular boss. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1 to 7 As shown, this embodiment of the invention provides an LED display screen, which includes a housing 10, a power supply box 20, a display module 30, and a sealing assembly 40. Both the power supply box 20 and the display module 30 are mounted on the housing 10. The power supply box 20 has a first wiring hole 21, and the electrical components inside the power supply box 20 are electrically connected to the display module 30 via connecting wires passing through the first wiring hole 21. The sealing assembly 40 includes a sealing frame 41, a first elastic sealing ring 42, and a second elastic sealing ring 43. The sealing frame 41 is disposed at the first wiring hole 21 and has a second wiring hole 411 to avoid the connecting wires. There is a floating gap between the frame 41 and the power supply box 20. The first elastic sealing ring 42 is disposed on the sealing frame 41 and surrounds the second wiring hole 411. The display module 30 is connected to the sealing frame 41 and abuts against the first elastic sealing ring 42 to seal the connection between the display module 30 and the sealing frame 41. The outer side of the second elastic sealing ring 43 is connected to the power supply box 20, and the inner side of the second elastic sealing ring 43 is connected to the sealing frame 41 and surrounds the second wiring hole 411 to seal the floating gap. The sealing frame 41 is supported by the second elastic sealing ring 43 so that the sealing frame 41 can be floated relative to the power supply box 20.

[0030] The LED display screen provided by the embodiment comprises a box body 10, a power supply box 20, a display module 30 and a sealing assembly 40. The connection part of the display module 30 and the sealing frame 41 is sealed by the first elastic sealing ring 42, and the connection part of the sealing frame 41 and the display module 30 is sealed by the second elastic sealing ring 43, so as to avoid rainwater entering the power supply box 20 through the first wire hole 21 or the second wire hole 411 and avoid internal circuit short circuit and scrap of the power supply box 20. Since the floating gap exists between the sealing frame 41 and the power supply box 20, the sealing frame 41 is supported by the second elastic sealing ring 43. When the position offset exists between the display module 30 and the power supply box 20, the elastic deformation of the second elastic sealing ring 43 can be utilized to make the sealing frame 41 float relative to the power supply box 20, eliminate the position offset between the display module 30 and the power supply box 20, reduce the position offset between the sealing frame 41 and the display module 30, and thus ensure the uniform distribution of the compression deformation of the first elastic sealing ring 42 in the circumferential direction, improve the use reliability of the sealing assembly 40, avoid the internal circuit short circuit caused by water entering the power supply box 20, and improve the service life and use safety of the LED display screen.

[0031] In the related art, the sealing structure between the display module 30 and the power supply box 20 comprises the following two ways.

[0032] The first way (comparative example 1) is that the elastic sealing ring is arranged on the front surface of the power supply box 20 and surrounds the first wire hole 21, the display module 30 is arranged on the box body 10, so that the first wire hole 21 and the second wire hole 411 are aligned, the elastic sealing ring is clamped between the power supply box 20 and the display module 30 in the front-rear direction, and the longitudinal section of the elastic sealing ring adopts a hollow structure.

[0033] The second way (comparative example 2) is that one end of the sealing frame is fixed on the front surface of the power supply box 20 and surrounds the first wire hole 21, the elastic sealing ring is sleeved on the sealing frame and surrounds the first wire hole 21, the display module 30 is arranged on the box body 10, so that the other end of the sealing frame is arranged in the wire hole arranged on the display module, the elastic sealing ring is clamped between the outer wall of the sealing frame and the hole wall of the wire hole, and the outer side wall of the elastic sealing ring is provided with a ring-shaped protrusion around the axis thereof.

[0034] However, the comparative example 1 has the problems of unreliable sealing effect of the elastic sealing ring or poor display effect of the LED display screen, and the comparative example 2 has the problems of poor sealing effect of the elastic sealing ring or poor display effect of the LED display screen when the installation error exists between the display module 30 and the power supply box 20.

[0035] And, the inventor found that, in the comparative example 1, the compression deformation force of the elastic sealing ring acts on the back of the display module 30 when the elastic sealing ring is arranged on the front of the power box 20, the elastic sealing ring can push the display module 30 to be separated from the box body 10 or deform the display module 30, so that the elastic sealing ring cannot normally seal the first wire hole 21 and the second wire hole 411, or the elastic sealing ring can deform the display module 30, which affects the display effect of the LED display screen; in the comparative example 2, when there is an installation error between the display module 30 and the power box 20, the sealing frame is offset in the radial direction of the wire hole relative to the wire hole, and since the elastic sealing ring is clamped between the outer wall of the sealing frame and the hole wall of the wire hole, the compression amount of the elastic sealing ring in the circumferential direction is uneven, on the one hand, the position with small compression amount of the elastic sealing ring cannot effectively seal the first wire hole 21 and the second wire hole 411, so that the power box 20 is waterlogged to cause internal circuit short circuit, on the other hand, the compression deformation force of the elastic sealing ring in the circumferential direction is uneven, the second wire hole 411 is subjected to unbalanced force in the circumferential direction by the elastic sealing ring, when the second wire hole 411 reaches force balance, the position of the display module 30 on the box body 10 is offset by the action of the elastic sealing ring, which causes the spacing between the display modules 30 to be uneven, and further causes the LED display screen to produce bright lines or dark lines, which affects the display effect of the LED display screen.

[0036] Wherein, the power box 20 and the box body 10 are a split structure, the front of the power box 20 is provided with the first wire hole 21, the back of the power box 20 is attached to the front of the box body 10, and the power box 20 is fixed on the front of the box body 10 by the fastener.

[0037] As Figure 5 And Figure 7As shown, the second elastic sealing ring 43 includes a first connecting section 431, a first deformation section 432 and a second connecting section 433 connected in sequence from outside to inside, the first connecting section 431, the first deformation section 432 and the second connecting section 433 are all annular, the first connecting section 431 is connected with the power box 20, the second connecting section 433 is connected with the sealing frame 41 and located outside the second wire hole 411, at least part of the longitudinal section of the first deformation section 432 is in arc structure. When the position offset occurs between the display module 30 and the power box 20, since the first connecting section 431, the first deformation section 432 and the second connecting section 433 are all annular, the second elastic sealing ring 43 can absorb the position offset between the display module 30 and the power box 20 in all directions, while reducing the position offset between the sealing frame 41 and the display module 30, so that the axis of the second wire hole 411 of the sealing frame 41 is always perpendicular to the cabinet 10, avoiding the failure of the sealing assembly 40 causing the internal circuit of the display module 30 to short circuit, improving the service life and use safety of the LED display screen. Moreover, since at least part of the longitudinal section of the first deformation section 432 is in arc structure, when the position offset occurs between the display module 30 and the power box 20, the first deformation section 432 can be deformed to absorb the position offset between the display module 30 and the power box 20, further ensuring the sealing and waterproof effect of the first elastic sealing ring 42 on the display module 30.

[0038] It should be noted that the longitudinal section of the first deformation section 432 includes arc structure means that the longitudinal section of the first deformation section 432 is all arc structure, or part of the longitudinal section of the first deformation section 432 is arc structure.

[0039] Wherein, the longitudinal section of the first deformation section 432 means that Figure 5 The cross section of the first deformation section 432 in the up-down direction includes arc structure.

[0040] As shown in Figure 5 and Figure 7 The longitudinal section of the first deformation section 432 is all arc, and the middle part of the first deformation section 432 protrudes away from the sealing frame 41. Since the longitudinal section of the first deformation section 432 is all arc, when the first deformation section 432 is subjected to the same force, the deformation amount of the first deformation section 432 increases, the first deformation section 432 is more likely to deform, when the position offset occurs between the display module 30 and the power box 20, the first deformation section 432 can absorb most of the position offset between the display module 30 and the power box 20, further reducing the position offset between the sealing frame 41 and the display module 30, and ensuring the sealing and waterproof effect of the first elastic sealing ring 42 on the display module 30.

[0041] As shown in Figure 3 ,Figure 5 as well as Figure 7 As shown, the sealing assembly 40 also includes a first annular pressure plate 44, which is connected to the power supply box 20. A first connecting segment 431 is sandwiched between the first annular pressure plate 44 and the power supply box 20. By sandwiching the first connecting segment 431 between the first annular pressure plate 44 and the power supply box 20, when the first deformable segment 432 undergoes elastic deformation, the connection between the first connecting segment 431 and the power supply box 20 is ensured to be reliable, thereby improving the reliability of the LED display screen.

[0042] like Figure 3 , Figure 5 as well as Figure 7 As shown, the sealing assembly 40 also includes a second annular pressure plate 45, which is connected to the sealing frame 41. A second connecting section 433 is sandwiched between the second annular pressure plate 45 and the sealing frame 41. By sandwiching the second connecting section 433 between the second annular pressure plate 45 and the sealing frame 41, the connection between the second connecting section 433 and the sealing frame 41 is ensured to be reliable when the first deformable section 432 undergoes elastic deformation, thereby improving the reliability of the LED display screen.

[0043] like Figure 5 As shown, the sealing frame 41 includes a base 412 and a first connecting cylinder 413 disposed on the base 412. The internal space of the first connecting cylinder 413 forms a second wiring hole 411. The display module 30 has a second connecting cylinder 31. The first connecting cylinder 413 and the second connecting cylinder 31 are inserted into each other. In the radial direction of the second wiring hole 411, a first elastic sealing ring 42 is sandwiched between the first connecting cylinder 413 and the second connecting cylinder 31. When the first connecting cylinder 413 and the second connecting cylinder 31 are inserted into each other, and the first elastic sealing ring 42 is sandwiched between the first connecting cylinder 413 and the second connecting cylinder 31, the first elastic sealing ring 42 is compressed and deformed in its radial direction by the pressure of the first connecting cylinder 413 and the second connecting cylinder 31. The first elastic sealing ring 42 seals the gap between the first connecting cylinder 413 and the second connecting cylinder 31, preventing rainwater from entering the interior of the display module 30 through the first mounting hole (i.e., the through hole formed by the second connecting cylinder 31), thereby improving the service life and safety of the LED display screen. Furthermore, since the direction of the compressive deformation force of the first elastic sealing ring 42 acting on the display module 30 is parallel to the display module 30, the display module 30 is not subjected to the compressive deformation force of the first elastic sealing ring 42 in the front-back direction. This prevents the first elastic sealing ring 42 from pushing the display module 30 out of the housing 10 or deforming the display module 30, ensuring that the first elastic sealing ring 42 properly seals the first wiring hole 21 and the second wiring hole 411, ensuring the display screen of the display module 30, and ensuring the display effect of the LED display screen.

[0044] like Figure 5As shown, in this embodiment, the first connecting cylinder 413 passes through the second connecting cylinder 31, and the first elastic sealing ring 42 is sandwiched between the outer side wall of the first connecting cylinder 413 and the inner side wall of the second connecting cylinder 31. In other embodiments, the second connecting cylinder 31 passes through the first connecting cylinder 413, and the first elastic sealing ring 42 is sandwiched between the inner side wall of the first connecting cylinder 413 and the outer side wall of the second connecting cylinder 31.

[0045] like Figure 5 and Figure 7 As shown, the first elastic sealing ring 42 includes a third connecting section 421, a second deformable section 422, and a fourth connecting section 423 connected sequentially along the axial direction of the second wiring hole 411. The third connecting section 421, the second deformable section 422, and the fourth connecting section 423 are all annular. The third connecting section 421 and the fourth connecting section 423 abut against the cylinder wall of the first connecting cylinder 413. The second deformable section 422 protrudes radially from the third connecting section 421 and the fourth connecting section 423 in the second wiring hole 411. The second deformable section 422 abuts against the cylinder wall of the second connecting cylinder 31. At least a portion of the longitudinal section of the second deformable section 422 is wavy. When the deformation of the second deformation section 422 is constant, since at least part of the longitudinal section of the second deformation section 422 is wavy, the second deformation section 422 can provide a large elastic force, ensuring the sealing effect of the second deformation section 422 on the gap between the first mounting hole (i.e. the through hole surrounded by the second connecting cylinder 31) and the sealing frame 41, thereby improving the service life and safety of the LED display screen.

[0046] It should be noted that the second deformed segment 422 protruding radially from the third connecting segment 421 and the fourth connecting segment 423 of the sealing frame 41 means that, viewed axially along the sealing frame 41, the maximum diameter of the second deformed segment 422 is greater than the maximum diameter of the third connecting segment 421, and the maximum diameter of the second deformed segment 422 is greater than the maximum diameter of the fourth connecting segment 423.

[0047] Among them, the radial direction of the sealing frame 41 refers to Figure 5 In the left and right directions, the axial direction of the sealing frame 41 refers to... Figure 5 The up and down directions in the middle.

[0048] It should be noted that the longitudinal section of the second deformed segment 422 including the wavy structure means that the entire longitudinal section of the second deformed segment 422 is a wavy structure, or that part of the longitudinal section of the second deformed segment 422 is a wavy structure.

[0049] The longitudinal section of the second deformed segment 422 refers to... Figure 5 The second deformed segment 422 is cut off in the vertical direction, and the cross section of the second deformed segment 422 in this direction includes a wave-shaped structure.

[0050] In this embodiment, the first deformable segment 432 is more easily deformable than the second deformable segment 422. When a positional shift occurs between the display module 30 and the power supply box 20, because the first deformable segment 432 is more easily deformable than the second deformable segment 422, the deformation of the first deformable segment 432 is greater than that of the second deformable segment 422. This allows the first deformable segment 432 to absorb most of the positional shift between the display module 30 and the power supply box 20, further reducing the positional shift between the sealing frame 41 and the display module 30, and ensuring the sealing and waterproofing effect of the second deformable segment 422 on the display module 30.

[0051] It should be noted that, assuming the first deformable segment 432 and the second deformable segment 422 are made of the same material, the first deformable segment 432 is more easily deformed than the second deformable segment 422. This can be achieved in the following three ways:

[0052] In the first method, the longitudinal section of the first deformable segment 432 is an arc, and the longitudinal section of the second deformable segment 422 is a wave shape with multiple acute angle bends. Since the bending frequency and bending degree of the first deformable segment 432 are both less than those of the second deformable segment 422, the first deformable segment 432 is easier to deform than the second deformable segment 422.

[0053] In the second approach, the thickness of the first deformable segment 432 is less than that of the second deformable segment 422, making the first deformable segment 432 more easily deformable than the second deformable segment 422.

[0054] In the third method, the longitudinal section of the first deformable segment 432 is an arc shape, the longitudinal section of the second deformable segment 422 is a wave shape with multiple acute angle bends, and the thickness of the first deformable segment 432 is less than that of the second deformable segment 422, making the first deformable segment 432 more easily deformable than the second deformable segment 422.

[0055] Of course, the first deformation segment 432 is more easily deformed than the second deformation segment 422, and it is not limited to the above three methods. As long as the first deformation segment 432 and the second deformation segment 422 are subjected to the same magnitude of force, the deformation of the first deformation segment 432 is greater than the deformation of the second deformation segment 422.

[0056] like Figure 5 and Figure 7 As shown, a limiting structure 50 is provided between the sealing frame 41 and the power supply box 20 to limit the movement of the sealing frame 41 relative to the power supply box 20. By limiting the movement of the sealing frame 41 relative to the power supply box 20 when it floats, the limiting structure 50 prevents the movement of the sealing frame 41 relative to the power supply box 20 from being too large, ensuring that the deformation of the second deformation segment 422 is within the range of structural reliability, avoiding damage to the second deformation segment 422, and improving the reliability of the LED display screen.

[0057] It should be noted that the travel distance of the sealing frame 41 relative to the power supply box 20 refers to the displacement of the sealing frame 41 relative to its initial state where it is not under force.

[0058] like Figure 5 and Figure 7 As shown, the limiting structure 50 includes a limiting cylinder 51, which is disposed on the bottom wall of the sealing frame 41 and surrounds the second wiring hole 411. The limiting cylinder 51 extends downward into the first wiring hole 21. The floating gap includes a lateral floating gap formed between the limiting cylinder 51 and the hole wall of the first wiring hole 21. When the sealing frame 41 moves radially relative to the power supply box 20, the lateral floating gap between the limiting cylinder 51 and the hole wall of the first wiring hole 21, combined with the limiting effect of the first wiring hole 21 on the limiting cylinder 51, prevents the sealing frame 41 from moving too far relative to the power supply box 20, avoids damage to the first deformed section 432, and improves the reliability of the LED display screen. Furthermore, given a fixed size for the second wiring hole 411, the size of the limiting cylinder 51 can be reduced by extending downward into the first wiring hole 21.

[0059] like Figure 5 As shown, the inner side of the second elastic sealing ring 43 is connected to the bottom wall of the sealing frame 41 and located inside the limiting cylinder 51, while the outer side of the second elastic sealing ring 43 is connected to the inner surface of the top wall of the power supply box 20. With this structure, the second elastic sealing ring 43 can seal the lateral floating gap, ensuring the sealing effect of the sealing assembly 40 and improving the service life and safety of the LED display screen.

[0060] Since the outer diameter of the limiting cylinder 51 is smaller than the diameter of the first wiring hole 21, the limiting cylinder 51 is movably inserted through the first wiring hole 21. The limiting effect of the first wiring hole 21 on the limiting cylinder 51 prevents the sealing frame 41 from moving too far relative to the power box 20, avoids damage to the first deformed section 432, and improves the reliability of the LED display screen.

[0061] It should be noted that the limiting cylinder 51 surrounding the second wiring hole 411 means that the limiting cylinder 51 is arranged around the outside of the second wiring hole 411, and the limiting cylinder 51 and the second wiring hole 411 are equally spaced.

[0062] like Figure 5 and Figure 7As shown, the limiting structure 50 also includes an annular limiting plate 53 and an annular boss 54. The annular limiting plate 53 is disposed on the side wall of the sealing frame 41 and surrounds the second wiring hole 411. The limiting cylinder 51 extends upward to the lower surface of the annular limiting plate 53. The annular boss 54 is disposed on the outer surface of the top wall of the power supply box 20 and surrounds the first wiring hole 21. The floating gap also includes a longitudinal floating gap formed between the lower surface of the annular limiting plate 53 and the upper surface of the annular boss 54. When the sealing frame 41 moves closer to the housing 10 relative to the power supply box 20, due to the longitudinal floating gap between the lower surface of the annular limiting plate 53 and the upper surface of the annular boss 54, when the lower surface of the annular limiting plate 53 abuts against the upper surface of the annular boss 54, the limiting effect of the annular boss 54 on the annular limiting plate 53 prevents the sealing frame 41 from moving too far relative to the power supply box 20, avoids damage to the first deformed section 432, and improves the reliability of the LED display screen.

[0063] It should be noted that the longitudinal floating gap between the lower surface of the annular limiting plate 53 and the upper surface of the annular boss 54 refers to the gap between the lower surface of the annular limiting plate 53 and the upper surface of the annular boss 54. When the first deformation section 432 is deformed by force, the sealing frame 41 can float relative to the power box 20 within this gap.

[0064] In this embodiment, the LED display screen includes multiple display modules 30 and multiple sealing components 40, with each display module 30 and sealing component 40 corresponding to one another. Therefore, the LED display screen can achieve a sealing and waterproofing effect on the display module 30 corresponding to the sealing component 40 through the multiple sealing components.

[0065] It should be noted that the first elastic sealing ring 42 is disposed on the sealing frame 41 and abuts against the display module 30, including the following two embodiments:

[0066] (1) The first elastic sealing ring 42 is sleeved on the side wall of the sealing frame 41, and the first elastic sealing ring 42 abuts against the display module 30 in a direction perpendicular to the axis of the first elastic sealing ring 42.

[0067] (2) In the axial direction of the first elastic sealing ring 42, the first elastic sealing ring 42 includes a first segment and a second segment connected to each other. The first segment of the first elastic sealing ring 42 is sleeved on the side wall of the sealing frame 41, and the second segment of the first elastic sealing ring 42 is disposed on the end wall of the sealing frame 41 away from the power box 20. In the axial direction of the first elastic sealing ring 42, the second segment of the first elastic sealing ring 42 abuts against the display module 30.

[0068] The LED display screen provided in this embodiment has the following beneficial effects:

[0069] (1) When there is a positional offset between the display module 30 and the power box 20, the elastic deformation of the second elastic sealing ring 43 can be used to make the sealing frame 41 float relative to the power box 20, thereby eliminating the positional offset between the display module 30 and the power box 20, thereby reducing the positional offset between the sealing frame 41 and the display module 30, thereby ensuring that the compression deformation of the first elastic sealing ring 42 in its circumferential direction is evenly distributed, improving the reliability of the sealing component 40, thereby preventing water from entering the power box 20 and causing a short circuit in the internal circuit, improving the service life and safety of the LED display screen;

[0070] (2) When there is a positional shift between the display module 30 and the power box 20, since the first deformation segment 432 is easier to deform than the second deformation segment 422, the deformation of the first deformation segment 432 is greater than that of the second deformation segment 422. This allows the first deformation segment 432 to absorb most of the positional shift between the display module 30 and the power box 20, further reducing the positional shift between the sealing frame 41 and the display module 30, and ensuring the sealing and waterproofing effect of the second deformation segment 422 on the display module 30.

[0071] (3) By limiting the movement of the sealing frame 41 relative to the power box 20 by the limiting structure 50, the movement of the sealing frame 41 relative to the power box 20 is not too large, ensuring that the deformation of the first deformation section 432 is within the range of structural reliability, avoiding damage to the first deformation section 432, and improving the reliability of the LED display screen.

[0072] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An LED display screen, characterized in that, The LED display screen comprises a box body (10), a power supply box (20), a display module (30) and a sealing assembly (40), the power supply box (20) and the display module (30) are arranged on the box body (10), the power supply box (20) has a first wiring hole (21), electrical devices in the power supply box (20) are electrically connected with the display module (30) through a connecting line penetrating the first wiring hole (21), and the sealing assembly (40) comprises: a sealing frame (41) arranged at the first wiring hole (21), the sealing frame (41) has a second wiring hole (411) avoiding the connecting line, and the sealing frame (41) and the power supply box (20) have a floating gap therebetween; a first elastic sealing ring (42) arranged on the sealing frame (41) and surrounding the second wiring hole (411), the display module (30) is connected to the sealing frame (41) and abuts against the first elastic sealing ring (42) to seal the connection between the display module (30) and the sealing frame (41); a second elastic sealing ring (43), the outer side of the second elastic sealing ring (43) is connected with the power supply box (20), the inner side of the second elastic sealing ring (43) is connected with the sealing frame (41) and surrounds the second wiring hole (411) to seal the floating gap, and the sealing frame (41) is supported by the second elastic sealing ring (43) to be arranged floatingly relative to the power supply box (20); wherein the outer side of the second elastic sealing ring (43) is located outside the floating gap, and the inner side of the second elastic sealing ring (43) is located inside the floating gap.

2. The LED display screen of claim 1, wherein, The second elastic sealing ring (43) comprises a first connecting section (431), a first deformation section (432) and a second connecting section (433) connected in sequence from outside to inside, the first connecting section (431), the first deformation section (432) and the second connecting section (433) are annular, the first connecting section (431) is connected with the power supply box (20), the second connecting section (433) is connected with the sealing frame (41) and located outside the second wiring hole (411), and at least part of the longitudinal section of the first deformation section (432) is in an arc structure.

3. The LED display screen of claim 2, wherein, The longitudinal section of the first deformation section (432) is entirely in an arc shape, and the middle part of the first deformation section (432) protrudes towards a direction away from the sealing frame (41).

4. The LED display screen of claim 2, wherein, The sealing assembly (40) further comprises: a first annular pressing plate (44), the first annular pressing plate (44) is connected with the power supply box (20), and the first connecting section (431) is clamped between the first annular pressing plate (44) and the power supply box (20); and / or a second annular pressing plate (45), the second annular pressing plate (45) is connected with the sealing frame (41), and the second connecting section (433) is clamped between the second annular pressing plate (45) and the sealing frame (41).

5. The LED display screen of claim 2, wherein, The sealing frame (41) comprises a base (412) and a first connecting cylinder (413) arranged on the base (412), and an inner space of the first connecting cylinder (413) forms the second wire hole (411); the display module (30) has a second connecting cylinder (31), the first connecting cylinder (413) and the second connecting cylinder (31) are inserted and matched, and the first elastic sealing ring (42) is clamped between the first connecting cylinder (413) and the second connecting cylinder (31) in the radial direction of the second wire hole (411).

6. The LED display screen of claim 5, wherein, The first elastic sealing ring (42) comprises a third connecting section (421), a second deformation section (422) and a fourth connecting section (423) connected in sequence in the axial direction of the second wire hole (411); the third connecting section (421), the second deformation section (422) and the fourth connecting section (423) are annular; the third connecting section (421) and the fourth connecting section (423) abut against the cylinder wall of the first connecting cylinder (413); the second deformation section (422) protrudes from the third connecting section (421) and the fourth connecting section (423) in the radial direction of the second wire hole (411); the second deformation section (422) abuts against the cylinder wall of the second connecting cylinder (31); and at least part of the longitudinal section of the second deformation section (422) is in a wave shape.

7. The LED display screen according to any one of claims 1 to 6, characterized in that, A limiting structure (50) is arranged between the sealing frame (41) and the power box (20) to limit the movement stroke of the sealing frame (41) when floating relative to the power box (20).

8. The LED display screen of claim 7, wherein, The limiting structure (50) comprises a limiting cylinder (51) arranged on the bottom wall of the sealing frame (41) and surrounding the second wire hole (411); the limiting cylinder (51) extends downward into the first wire hole (21); and the floating gap comprises a transverse floating gap formed between the limiting cylinder (51) and the hole wall of the first wire hole (21).

9. The LED display screen of claim 8, wherein, The inner side of the second elastic sealing ring (43) is connected to the bottom wall of the sealing frame (41) and located inside the limiting cylinder (51); and the outer side of the second elastic sealing ring (43) is connected to the inner surface of the top wall of the power box (20).

10. The LED display screen of claim 8, wherein, The limiting structure (50) further comprises: An annular limiting plate (53) arranged on the side wall of the sealing frame (41) and surrounding the second wire hole (411); the limiting cylinder (51) extends upward to the lower surface of the annular limiting plate (53); An annular boss (54) arranged on the outer surface of the top wall of the power box (20); the annular boss (54) surrounds the first wire hole (21); and the floating gap further comprises a longitudinal floating gap formed between the lower surface of the annular limiting plate (53) and the upper surface of the annular boss (54).

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