An LED display screen

Abstract

An LED display screen includes a box frame assembly, an LED display module arranged on the front of the box frame assembly, and a power control box arranged on the back of the box frame assembly. The box frame assembly includes a frame body, upper and lower eccentric locks arranged on the upper and lower sides of the frame body, and left and right arc-shaped locks arranged on the left and right sides of the frame body. The upper and lower eccentric locks are used to connect two adjacent LED display screens in the up-down direction, and the left and right arc-shaped locks are used to connect two adjacent LED display screens in the left-right direction at a predetermined angle. The power control box is arranged on the back of the frame body and includes a control box shell and a cooling fan assembly. The cooling fan assembly is mounted in the control box shell. The LED display screen further includes a display screen wind-resistant frame configured to be unfolded or folded on the frame body. The LED display screen has the characteristics of high heat dissipation, angle connection support, convenient operation, and stability and reliability.

Description

Technical Field

[0001] This utility model relates to the field of display screen technology, and specifically to an LED display screen. Background Technology

[0002] With the development of the times, LED displays are widely used in squares, National Day celebrations, leisure squares, large entertainment squares, bustling commercial centers, advertising information boards, commercial streets, railway stations, waiting rooms, performing arts centers, live television broadcasts, exhibition halls, concert venues and other places.

[0003] Currently, LED displays suffer from low heat dissipation efficiency. If components such as driver ICs and switching power supplies inside the power control box operate continuously in a high-temperature environment, it will accelerate the aging of electronic components, thereby shortening the lifespan of the display. Furthermore, the curved locks and top and bottom locks of common LED displays are generally cumbersome to operate. In addition, the windproof frames of traditional LED displays mostly use bolt-fixed connections, which require disassembly and reassembly when they need to be opened or closed, resulting in low work efficiency and inconvenience. Therefore, there is an urgent need for an LED display to solve the above problems. Utility Model Content

[0004] In view of this, an LED display screen with high heat dissipation, supports angle connection, is easy to operate, and is stable and reliable is provided.

[0005] An LED display screen includes a cabinet frame assembly, an LED display module disposed on the front of the cabinet frame assembly, and a power control box disposed on the back of the cabinet frame assembly. The cabinet frame assembly includes a frame body, an upper eccentric lock and a lower eccentric lock disposed on the upper and lower sides of the frame body, and a left arc lock and a right arc lock disposed on the left and right sides of the frame body. The upper eccentric lock and the lower eccentric lock are used to connect two adjacent LED displays in the vertical direction, and the left arc lock and the right arc lock are used to connect two adjacent LED displays in the horizontal direction at a predetermined angle. The power control box is disposed on the back of the frame body and includes a control box housing and a cooling fan assembly. The cooling fan assembly is mounted on the control box housing. The LED display screen also includes a display screen windproof frame, which is designed to be able to unfold or retract into the frame body.

[0006] Furthermore, the cooling fan assembly is mounted on the surface of the control box housing away from the frame body. The surface of the control box housing away from the frame body has multiple vertical heat dissipation strips arranged at equal intervals. The cooling fan assembly includes two fan mounting brackets, which are arranged side by side and detachably connected to the vertical heat dissipation strips.

[0007] Furthermore, the cooling fan assembly also includes a fan body and a mounting cover. The fan body has a mounting hole facing the center of the fan mounting bracket, and the fan mounting bracket has a mounting shaft facing the center of the fan body. The fan body is rotatably connected to the inside of the fan mounting bracket by cooperating with the mounting hole and the mounting shaft. The mounting cover covers the fan body and the fan mounting bracket. The mounting cover is in the shape of a straight grid and is fixed to the four corners of the fan mounting bracket.

[0008] Furthermore, the left arc-shaped lock includes a hanging rod lock component, and the right arc-shaped lock includes a rotary lock base. The rotary lock base includes a lock cylinder and a multi-path radial support integral with the lock cylinder. The lock cylinder is rotatably connected to the frame body via a positioning pin. Each radial support has a lock hook at its end and a lock surface at a predetermined angle to the main surface of the radial support. The main surface of the radial support is substantially parallel to the back of the box frame assembly. The hanging rod lock component includes a mounting base and a U-shaped hanging rod. The mounting base is fixed to the frame body by fasteners, and the U-shaped hanging rod is rotatably connected to the mounting base. When two adjacent LED displays are angularly connected, the U-shaped hanging rod is hooked into the lock hook, and the mounting surface of the mounting base is in contact with the lock surface.

[0009] Furthermore, the hanging rod lock also includes a button, a synchronizing button, and a connecting shaft. The button and the synchronizing button are fixed at both ends of the connecting shaft, and the two ends of the opening of the U-shaped hanging rod are respectively fixed to the button and the synchronizing button. The hanging rod lock also includes an unlocking button, a handle, a first torsion spring, and a second torsion spring. The two ends of the first torsion spring act on the unlocking button and the handle respectively. The second torsion spring has a U-shaped structure with a central elastic section and two U-shaped ends. The two ends of the U-shape act on the button and the synchronizing button respectively, and the central elastic section abuts against the handle. The rotating lock base also includes a fixed handle. The lock cylinder has a stepped through hole and is equipped with a ball bearing turntable to achieve a rotatable connection with the positioning pin. The upper surface of the lock cylinder has annularly distributed positioning ball grooves, and the lower surface of the fixed handle has a corresponding ball limiting groove. The positioning ball grooves achieve the rotational positioning of the lock cylinder by the cooperation of the ball with the positioning ball grooves.

[0010] Furthermore, the upper eccentric lock includes an upper locking member, and the lower eccentric lock includes a lower locking member. The upper locking member has a locking part with a lock hole, and the lower locking member includes a locking rod and a rotating handle. The locking rod includes a round rod part and a flat head. The rotating handle is angularly fixedly connected to the round rod part. The cross-section of the flat head includes a semi-circular segment and a transition arc segment. The locking rod is eccentrically set with the lock hole. The transition arc segment of the flat head is clearance-fitted with the lock hole so that the flat head can be inserted into the lock hole. The semi-circular segment is eccentrically frictionally contacted with the lock hole to form a radial interference fit to achieve locking.

[0011] Furthermore, the lower locking component also includes a locking channel and an insertion position. The locking part is inserted into the insertion position, and the locking rod is coaxially mounted in the locking channel. A transverse opening is provided on the side wall of the locking channel. An unlocking groove and a locking groove are provided on the upper side of the transverse opening. The rotating handle passes through the transverse opening and can rotate into the unlocking groove or the locking groove. The unlocking groove and the locking groove are arranged sequentially facing the locking part. When the rotating handle rotates into the unlocking groove, the flat head is located outside the lock hole. When it rotates into the locking groove, the semi-circular section makes eccentric frictional contact with the inner wall of the lock hole. The inner wall of the lock hole is provided with a wear-resistant metal sleeve, or the locking part is made of stainless steel. The round rod part is provided with multiple positioning glass ball grooves around its circumference. The lower locking component also includes a glass ball screw, which cooperates with the positioning glass ball grooves to achieve auxiliary locking.

[0012] Furthermore, the wind-resistant frame for the display screen includes a main support rod, two first movable parts, and two second movable parts. The frame body has a first mounting position and a second mounting position. The two first movable parts are arranged side by side, with one end connected to the upper and lower parts of the main support rod, and the other end rotatably connected to the upper and lower parts of the first mounting position. The two second movable parts are arranged side by side, with one end rotatably connected to the upper and lower parts of the second mounting position. The first movable parts are equipped with a latch, and the main support rod is equipped with a locking position. In the open state, the main support rod rotates away from the frame body, and the other end of the second movable part is inserted into the locking position through an elastic pin to lock the main support rod. In the closed state, the main support rod rotates closer to the frame body, and the other end of the second movable part is inserted into the latch through an elastic pin to lock the first movable part.

[0013] Furthermore, the first movable component has a sleeve at its end, through which the main support rod passes and is fixed to the inner wall of the sleeve. The second movable component has an elastic pin at its end, and the sleeve has a through hole corresponding to the locking position. When the windproof frame of the display screen is opened, the elastic pin passes through the through hole and locks with the locking position. The second movable component has a semi-circular claw at its end, the inner semi-circular surface of which contacts the outer wall of the sleeve. The semi-circular claw has a pin limiting groove and a pin hole communicating with the pin limiting groove. The elastic pin is installed... The elastic pin, installed in the pin limiting groove, includes an elastic element, an unlocking button, and a pin extending into the pin hole. The unlocking button is fixed to the pin. One end of the elastic element acts on the pin and the other end acts on the semi-circular claw portion. The latch has a through hole. When the display screen windproof frame is retracted, the surface of the second movable member facing the frame body fits against the surface of the first movable member facing away from the frame body. The center line of the through hole coincides with the center line of the elastic pin so that the elastic pin can be aligned and inserted into the through hole.

[0014] Furthermore, the windproof frame of the display screen also includes a secondary support assembly. The secondary support assembly has a T-shaped structure and includes a horizontal part and a vertical part that is perpendicularly connected to the horizontal part. The two ends of the horizontal part are respectively connected to the middle of the two first movable parts, and the vertical part is connected to the middle of the first mounting position.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] First, this type of LED display not only increases the heat dissipation area of ​​the power control box by setting multiple vertical heat dissipation strips, but also installs a cooling fan assembly in the control box housing. The fan accelerates airflow and drives heat dissipation more quickly, thus improving heat dissipation efficiency.

[0017] Secondly, the left and right arc-shaped locks of this LED display screen can be locked by cooperating with the locking hooks of the multi-path support through the U-shaped hanging rod. At the same time, the rotation action supports multi-angle docking. The upper and lower eccentric locks adopt an eccentric friction contact design. When the rotating handle is turned into the locking groove, the semi-circular section makes eccentric friction contact with the inner wall of the lock hole to lock it. The operation is convenient and quick.

[0018] Third, the wind-resistant frame of this LED display screen can switch between open and closed states by pressing a single finger to unlock it with a flexible pin, and it is also equipped with a secondary support component to enhance stability. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of an LED display screen according to an embodiment of the present utility model.

[0020] Figure 2 This is an exploded view of the structure of a cooling fan assembly for an LED display screen according to an embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the left and right arc-shaped locks of an LED display screen according to an embodiment of this utility model.

[0022] Figure 4 This is an exploded view of the structure of the hanging rod lock of the left and right arc-shaped lock of an LED display screen according to an embodiment of the present invention.

[0023] Figure 5 This is an exploded view of the rotating lock base of the left and right arc-shaped locks of an LED display screen according to an embodiment of the present invention.

[0024] Figure 6 This is an exploded view of the upper and lower eccentric locks of an LED display screen according to an embodiment of the present invention.

[0025] Figure 7This is a schematic diagram of the structure of the upper and lower eccentric lock rods of an LED display screen cooperating with the rotating handle, according to an embodiment of this utility model.

[0026] Figure 8 This is a cross-sectional schematic diagram of the upper and lower eccentric locks of an LED display screen according to an embodiment of this utility model.

[0027] Figure 9 yes Figure 8 A magnified view of part A in the diagram.

[0028] Figure 10 yes Figure 8 A magnified view of part B in the diagram.

[0029] Figure 11 This is a three-dimensional structural diagram of an LED display screen with its wind-resistant frame in an open state, according to an embodiment of this utility model.

[0030] Figure 12 This is an exploded view of the structure of an LED display screen with its wind-resistant frame in an open state, according to an embodiment of this utility model.

[0031] Figure 13 This is an exploded view of the structure of the second movable component of the wind-resistant frame of an LED display screen according to an embodiment of the present invention.

[0032] Figure 14 This is a three-dimensional structural diagram of the wind-resistant frame of an LED display screen in the retracted state, according to an embodiment of this utility model.

[0033] Figure 15 This is a three-dimensional structural diagram of an LED display screen wind-resistant frame that is folded into the main frame body according to an embodiment of this utility model.

[0034] In the picture,

[0035] 1. LED display module; 2. Power control box; 3. Frame body; 4. Control box housing; 5. Display screen windproof frame; 6. Vertical heat dissipation strip; 7. Fan mounting bracket; 8. Fan body; 9. Fixing cover; 10. Hanging rod lock; 11. Rotary lock seat; 12. Lock cylinder; 13. Radial support; 14. Positioning pin; 15. Lock hook; 16. Main surface; 17. Lock face; 18. U-shaped hanging rod; 19. Mounting base; 20. Mounting surface; 21. Button; 22. Synchronization button; 23. Connecting shaft; 24. Unlock button; 25. Handle; 26. First torsion spring; 27. Second torsion spring; 28. Elastic segment; 29. ​​Fixed handle; 30. Stepped through hole; 31. Ball bearing turntable; 32. Locking component; 33. Lower locking component; 34. Locking part; 35. Lock hole; 36. Locking rod; 37. Rotary handle; 38. Round rod part; 39. Flat head; 40. Semicircular section; 41. Transition arc section; 42. Lock track; 43. Insertion position; 44. Unlocking groove; 45. Locking groove; 46. Main support rod; 47. First moving part; 48. Second moving part; 49. First mounting position; 50. Second mounting position; 51. Locking buckle; 52. Locking position; 53. Elastic pin; 54. Sleeve; 55. Through hole; 56. Semicircular claw part; 57. Pin limiting groove; 58. Pin hole; 59. Elastic element; 60. Unlocking button; 61. Pin part; 62. Through hole; 63. Horizontal part; 64. Vertical part. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0037] Please see Figures 1 to 15This illustration shows an LED display screen provided by an embodiment of the present invention, including a cabinet frame assembly, an LED display module 1 disposed on the front of the cabinet frame assembly, and a power control box 2 disposed on the back of the cabinet frame assembly. The cabinet frame assembly includes a frame body 3, an upper eccentric lock and a lower eccentric lock disposed on the upper and lower sides of the frame body 3, and a left arc lock and a right arc lock disposed on the left and right sides of the frame body 3. The upper eccentric lock and the lower eccentric lock are used to connect two adjacent LED displays in the vertical direction, and the left arc lock and the right arc lock are used to connect two adjacent LED displays in the horizontal direction at a predetermined angle. The power control box 2 is disposed on the back of the frame body 3. The power control box 2 includes a control box housing 4 and a cooling fan assembly. The cooling fan assembly is mounted on the control box housing 4 to dissipate heat from the control box housing 4. The LED display screen also includes a display screen windproof frame 5, which is configured to be able to unfold or retract into the frame body 3.

[0038] Specifically, the cooling fan assembly is mounted on the surface of the control box housing 4 away from the frame body 3. The surface of the control box housing 4 away from the frame body 3 has multiple vertical heat dissipation strips 6 arranged at equal intervals. The cooling fan assembly includes two fan mounting brackets 7, which are arranged side by side and detachably connected to the vertical heat dissipation strips 6.

[0039] More specifically, the cooling fan assembly further includes a fan body 8 and a mounting cover 9. The fan body 8 has a mounting hole facing the center of the fan mounting bracket 7, and the fan mounting bracket 7 has a mounting shaft facing the center of the fan body 8. The fan body 8 is rotatably connected to the inside of the fan mounting bracket 7 through the mounting hole and the mounting shaft. The mounting cover 9 covers the fan body 8 and the fan mounting bracket 7. The mounting cover 9 is preferably in the shape of a straight grid. Preferably, the mounting cover 9 is fixed to the four corners of the fan mounting bracket 7.

[0040] Specifically, the left arc-shaped lock includes a hanging rod lock 10, and the right arc-shaped lock includes a rotating lock seat 11. The rotating lock seat 11 includes a lock cylinder 12 and a multi-path radial support 13 integral with the lock cylinder 12. The lock cylinder 12 is rotatably connected to the frame body 3 via a positioning pin 14. Each radial support 13 has a locking hook 15 at its end and a locking surface 17 at a predetermined angle to the main surface 16 of the radial support 13. The main surface 16 of the radial support 13 is substantially parallel to the back of the box frame assembly. The hanging rod lock 10 includes a mounting base 19 and a U-shaped hanging rod 18. The mounting base 19 is fixed to the frame body 3 by fasteners, and the U-shaped hanging rod 18 is rotatably connected to the mounting base 19. When two adjacent LED displays are angularly connected, the U-shaped hanging rod 18 hooks into the locking hook 15, and the mounting surface 20 of the mounting base 19 fits against the locking surface 17.

[0041] More specifically, the hanging rod lock 10 further includes a button 21, a synchronization button 22, and a connecting shaft 23. The connecting shaft 23 fixes the button 21 and the synchronization button 22 at both ends, and the opening ends of the U-shaped hanging rod 18 are respectively fixed to the button 21 and the synchronization button 22. The hanging rod lock 10 also includes an unlocking button 24, a handle 25, a first torsion spring 26, and a second torsion spring 27. The two ends of the first torsion spring 26 act on the unlocking button 24 and the handle 25 respectively. The second torsion spring 27 has a U-shaped structure and a central elastic segment 28. The U-shaped section 28 abuts against the handle 25 at both ends. The rotating lock base 11 also includes a fixed handle 29. The lock cylinder 12 has a stepped through hole 30 and is fitted with a ball bearing disc 31 to achieve rotatable connection with the positioning pin 14. The upper surface of the lock cylinder 12 has annularly distributed positioning ball grooves, and the lower surface of the fixed handle 29 has correspondingly provided ball limiting grooves. The positioning ball grooves are used to achieve rotational positioning of the lock cylinder 12 through the cooperation of the balls. Preferably, the sides of the button 21 and the synchronizing button 22 facing each other are respectively provided with torsion spring grooves. The two ends of the U-shaped opening of the second torsion spring 27 extend into the torsion spring groove and act on the sidewall of the torsion spring groove, so that the button 21 and the synchronizing button 22 can rotate synchronously under the action of the second torsion spring 27, thereby driving the U-shaped hanging rod 18 fixed to the button 21 and the synchronizing button 22 to rotate.

[0042] In some specific embodiments, when the unlock button 24 is pressed down, the first torsion spring 26 drives the bottom of the handle 25 to rotate around the connecting shaft 23 toward the mounting base 19, thereby pressing the elastic segment 28 of the second torsion spring 27. This causes the two ends of the U-shaped opening of the second torsion spring 27 to synchronously drive the button 21 and the synchronizing button 22 to rotate counterclockwise, thereby lifting the U-shaped hanging rod 18 upward to unlock. When locking is required, first align the mounting surface 20 of one side of the adjacent LED display screen with the locking surface 17 of the other side, press the button 21 to hook the U-shaped hanging rod 18 into the locking hook 15 to lock it. After locking, release the unlock button 24 to stop the lock. At this time, to release the locked state, simply press the unlock button 24 to unlock, and then flick the button 21 to quickly separate the U-shaped hanging rod 18 from the locking hook 15.

[0043] Specifically, the upper eccentric lock includes an upper locking member 32, and the lower eccentric lock includes a lower locking member 33. The upper locking member 32 is provided with a locking part 34 with a lock hole 35. The lower locking member 33 includes a locking rod 36 and a rotating handle 37. The locking rod 36 includes a round rod part 38 and a flat head 39. The rotating handle 37 is angularly fixedly connected to the round rod part 38. The cross-section of the flat head 39 includes a semi-circular segment 40 and a transition arc segment 41. The locking rod 36 is eccentrically positioned with the lock hole 35. The transition arc segment 41 of the flat head 39 is clearance-fitted with the lock hole 35 so that the flat head 39 can be inserted into the lock hole 35. The semi-circular segment 40 and the lock hole 35 are eccentrically frictionally contacted to form a radial interference fit to achieve locking.

[0044] More specifically, the lower locking member 33 also includes a locking channel 42 and an insertion position 43. The locking part 34 is inserted into the insertion position 43. The locking rod 36 is coaxially mounted in the locking channel 42. A transverse opening is opened on the side wall of the locking channel 42. An unlocking groove 44 and a locking groove 45 are provided on the upper side of the transverse opening. The rotating handle 37 passes through the transverse opening and can be rotated into the unlocking groove 44 or the locking groove 45. The unlocking groove 44 and the locking groove 45 are arranged sequentially facing the locking part 34. When the rotating handle 37 is rotated into the unlocking groove 44, the flat head 39 is located outside the lock hole 35. When it is rotated into the locking groove 45, the semi-circular section 40 makes eccentric frictional contact with the inner wall of the lock hole 35. The inner wall of the lock hole 35 is provided with a wear-resistant metal sleeve or the locking part 34 is entirely made of stainless steel. The round rod part 38 is provided with multiple positioning glass ball grooves around its circumference. The lower locking member 33 also includes a glass ball screw. The glass ball screw cooperates with the positioning glass ball grooves to achieve auxiliary locking.

[0045] In some specific embodiments, to lock two adjacent LED displays, the adjacent frame bodies 3 must first be aligned, and the locking part 34 is inserted into the insertion position 43 of the lower locking piece 33. At this time, the lock hole 35 is opposite to the locking channel 42. Then, the rotating handle 37 is moved to directly below the locking groove 45. The rotation of the handle 37 will drive the locking rod 36 to move along the locking channel 42 until the flat head 39 is inserted into the lock hole 35. The transition arc section 41 of the flat head 39 is fitted with the lock hole 35 with a clearance to ensure that the flat head 39 can be smoothly inserted into the lock hole 35. Then, the rotating handle 37 is rotated upwards, and the rotating handle 37 drives the locking rod 36 to rotate approximately 90°. At this time, the semi-circular section 40 of the flat head 39 is in eccentric contact with the inner wall of the lock hole 35. A radial clamping force is generated, forming an interference fit friction lock. At the same time, the rotating handle 37 is engaged in the locking groove 45 of the lock channel 42 for limiting. The glass ball part of the glass ball screw is embedded in the positioning glass ball groove, producing a glass ball positioning sound and significantly increasing the frictional resistance to prevent loosening. When unlocking, the rotating handle 37 is rotated downwards, and the rotating handle 37 drives the locking rod 36 to rotate approximately 90°. At this time, the transition arc 41 of the flat head 39 is engaged with the lock hole 35 with a clearance, allowing the locking rod 36 to move in the direction of exiting the lock hole 35. When the rotating handle 37 moves to directly below the unlocking groove 44, the flat head 39 completely exits the lock hole 35, completing the unlocking. At this time, the rotating handle 37 is rotated upwards, and the rotating handle 37 is engaged in the unlocking groove 44 for limiting.

[0046] Specifically, the windproof frame 5 for the display screen includes a main support rod 46, two first movable parts 47, and two second movable parts 48. The frame body 3 is provided with a first mounting position 49 and a second mounting position 50. The two first movable parts 47 are arranged side by side, with one end connected to the upper and lower parts of the main support rod 46 respectively, and the other end rotatably connected to the upper and lower parts of the first mounting position 49. The two second movable parts 48 are arranged side by side, with one end rotatably connected to the upper and lower parts of the second mounting position 50. The first movable parts 47 are provided with a latch 51, and the main support rod 46 is provided with a locking position 52. When the frame body 3 is open, the main support rod 46 rotates away from the frame body 3, and the other end of the second movable part 48 is inserted into the locking position 52 through an elastic pin 53 to lock the main support rod 46. When the frame body 3 is closed, the main support rod 46 rotates closer to the frame body 3, and the other end of the second movable part 48 is inserted into the latch 51 through an elastic pin 53 to lock the first movable part 47.

[0047] More specifically, the end of the first movable member 47 is provided with a sleeve 54, the main support rod 46 passes through the sleeve 54 and is fixed to the inner wall of the sleeve 54, the end of the second movable member 48 is provided with the elastic pin 53, the sleeve 54 is provided with a through hole 55 corresponding to the locking position 52, when the display screen windproof frame 5 is opened, the elastic pin 53 passes through the through hole 55 and locks with the locking position 52; the end of the second movable member 48 is provided with a semi-circular claw portion 56, the semi-circular inner surface of the semi-circular claw portion 56 contacts the outer wall of the sleeve 54, the semi-circular claw portion 56 has a pin limiting groove 57 and a pin hole 58 communicating with the pin limiting groove 57, the elastic pin 53 Installed in the pin limiting groove 57, the elastic pin 53 includes an elastic element 59, an unlocking button 60, and a pin 61 extending into the pin hole 58. The unlocking button 60 is fixed to the pin 61. One end of the elastic element 59 acts on the pin 61, and the other end acts on the semi-circular claw portion 56. The latch 51 has a through hole 62. When the display screen windproof frame 5 is retracted, the surface of the second movable member 48 facing the frame body 3 is in contact with the surface of the first movable member 47 facing away from the frame body 3. The center line of the through hole 62 coincides with the center line of the elastic pin 53 so that the elastic pin 53 can be aligned and inserted into the through hole 62.

[0048] In some specific embodiments, pressing the unlock button 60 elastically retracts the pin 61, pushes the main support rod 46 inward so that the second movable part 48 fits against the first movable part 47, and the through hole 62 of the latch 51 automatically aligns with the pin 61. The insertion end of the pin 61 is inserted into the through hole 62 under the elastic force of the elastic member 59 to complete the closing and locking action. When it needs to be opened, pressing the unlock button 60 again elastically retracts the pin 61, pushes the main support rod 46 outward to rotate, and drives the pin 61 at the end of the second movable part 48 to insert into the through hole 55 of the sleeve 54. When the pin 61 is aligned with the locking position 52, the elastic member 59 drives it to vertically insert into the locking position 52 to complete the locking. At this time, the first movable part 47, the second movable part 48 and the main support rod 46 form a stable triangular support structure.

[0049] More specifically, the windproof frame 5 of the display screen also includes a secondary support assembly. The secondary support assembly has a T-shaped structure and includes a horizontal part 63 and a vertical part 64 that is perpendicularly connected to the horizontal part 63. The two ends of the horizontal part 63 are respectively connected to the middle of the two first movable members 47, and the vertical part 64 is connected to the middle of the first mounting position 49.

[0050] In summary, this LED display screen not only increases the heat dissipation area of ​​the power control box 2 by setting multiple vertical heat dissipation strips 6, but also installs a cooling fan assembly in the control box housing 4. The fan accelerates airflow and heat dissipation, improving the heat dissipation efficiency of the control box housing 4. The left and right arc locks of this LED display screen can be locked by cooperating with the locking hooks 15 of the multi-path support 13 through the U-shaped hanging rod 18. At the same time, the rotation action supports multi-angle docking. The upper and lower eccentric locks adopt an eccentric friction contact design. When the handle 37 is rotated into the locking groove 45, the semi-circular section 40 makes eccentric friction contact with the inner wall of the lock hole 35 to lock, making the operation convenient and quick. The windproof frame 5 of this LED display screen can switch between open and closed states by pressing the unlock button 60 with a single finger through the setting of elastic pin 53. It is also equipped with a secondary support component to enhance stability.

[0051] It should be noted that this utility model is not limited to the above-described embodiments. Based on the inventive spirit of this utility model, those skilled in the art can make other changes, and these changes made based on the inventive spirit of this utility model should be included within the scope of protection claimed by this utility model.

Claims

1. An LED display screen, comprising a cabinet frame assembly, an LED display module disposed on the front side of the cabinet frame assembly, and a power control box disposed on the back side of the cabinet frame assembly, characterized in that, The enclosure frame assembly includes a frame body, upper and lower eccentric locks on the upper and lower sides of the frame body, and left and right arc-shaped locks on the left and right sides of the frame body. The upper and lower eccentric locks are used to connect two adjacent LED displays in the vertical direction, and the left and right arc-shaped locks are used to connect two adjacent LED displays in the horizontal direction at an angle. The power control box is located on the back of the frame body. The power control box includes a control box housing and a cooling fan assembly. The cooling fan assembly is mounted on the control box housing. The LED display also includes a display windproof frame, which is designed to be able to unfold or retract into the frame body.

2. The LED display screen as described in claim 1, characterized in that, The cooling fan assembly is mounted on the surface of the control box housing away from the main frame. The surface of the control box housing away from the main frame has multiple vertical heat dissipation strips arranged at equal intervals. The cooling fan assembly includes two fan mounting brackets, which are arranged side by side and detachably connected to the vertical heat dissipation strips.

3. An LED display screen as described in claim 2, characterized in that, The cooling fan assembly also includes a fan body and a mounting cover. The fan body has a mounting hole in the middle of the fan mounting bracket, and the fan mounting bracket has a mounting shaft in the middle of the fan body. The fan body is rotatably connected to the inside of the fan mounting bracket by cooperating with the mounting hole and the mounting shaft. The mounting cover covers the fan body and the fan mounting bracket. The mounting cover is a straight grid shape, and the mounting cover is fixed to the four corners of the fan mounting bracket.

4. An LED display screen as described in claim 1, characterized in that, The left arc-shaped lock includes a hanging rod lock component, and the right arc-shaped lock includes a rotating lock base. The rotating lock base includes a lock cylinder and a multi-path radial support integral with the lock cylinder. The lock cylinder is rotatably connected to the frame body by a positioning pin. Each radial support has a lock hook at its end and a lock surface at a predetermined angle to the main surface of the radial support. The main surface of the radial support is substantially parallel to the back of the box frame assembly. The hanging rod lock component includes a mounting base and a U-shaped hanging rod. The mounting base is fixed to the frame body by fasteners, and the U-shaped hanging rod is rotatably connected to the mounting base. When two adjacent LED displays are angularly connected, the U-shaped hanging rod is hooked into the lock hook, and the mounting surface of the mounting base is in contact with the lock surface.

5. An LED display screen as described in claim 4, characterized in that, The hanging rod lock also includes a button, a synchronization button, and a connecting shaft. The button and synchronization button are fixed at both ends of the connecting shaft, and the two ends of the opening of the U-shaped hanging rod are fixed to the button and synchronization button, respectively. The hanging rod lock also includes an unlocking button, a handle, a first torsion spring, and a second torsion spring. The two ends of the first torsion spring act on the unlocking button and the handle, respectively. The second torsion spring has a U-shaped structure with a central elastic section and two U-shaped ends. The two ends of the U-shape act on the button and the synchronization button, respectively, and the central elastic section abuts against the handle. The rotating lock base also includes a fixed handle. The lock cylinder has a stepped through hole and is equipped with a ball bearing turntable to achieve rotatable connection with the positioning pin. The upper surface of the lock cylinder has annularly distributed positioning ball grooves, and the lower surface of the fixed handle has correspondingly provided ball limiting grooves. The positioning ball grooves achieve the rotational positioning of the lock cylinder by the cooperation of the ball with the positioning ball grooves.

6. An LED display screen as described in claim 1, characterized in that, The upper eccentric lock includes an upper locking component, and the lower eccentric lock includes a lower locking component. The upper locking component has a locking part with a lock hole, and the lower locking component includes a locking rod and a rotating handle. The locking rod includes a round rod part and a flat head. The rotating handle is angularly fixedly connected to the round rod part. The cross-section of the flat head includes a semi-circular segment and a transition arc segment. The locking rod is eccentrically set with the lock hole. The transition arc segment of the flat head is clearance-fitted with the lock hole so that the flat head can be inserted into the lock hole. The semi-circular segment is eccentrically frictionally contacted with the lock hole to form a radial interference fit to achieve locking.

7. An LED display screen as described in claim 6, characterized in that, The lower locking component also includes a locking channel and an insertion position. The locking part is inserted into the insertion position. The locking rod is coaxially mounted in the locking channel. A transverse opening is opened on the side wall of the locking channel. An unlocking groove and a locking groove are provided on the upper side of the transverse opening. The rotating handle passes through the transverse opening and can rotate into the unlocking groove or the locking groove. The unlocking groove and the locking groove are arranged sequentially facing the locking part. When the rotating handle rotates into the unlocking groove, the flat head is located outside the lock hole. When it rotates into the locking groove, the semi-circular section makes eccentric frictional contact with the inner wall of the lock hole. The inner wall of the lock hole is provided with a wear-resistant metal sleeve or the locking part is made of stainless steel. The round rod part is provided with multiple positioning glass ball grooves around its circumference. The lower locking component also includes a glass ball screw. The glass ball screw cooperates with the positioning glass ball grooves to achieve auxiliary locking.

8. An LED display screen as described in claim 1, characterized in that, The wind-resistant frame for the display screen includes a main support rod, two first movable parts, and two second movable parts. The main frame body has a first mounting position and a second mounting position. The two first movable parts are arranged side by side, with one end connected to the upper and lower parts of the main support rod, and the other end rotatably connected to the upper and lower parts of the first mounting position. The two second movable parts are also arranged side by side, with one end rotatably connected to the upper and lower parts of the second mounting position. The first movable parts are equipped with latches, and the main support rod is equipped with a locking position. In the open state, the main support rod rotates away from the main frame body, and the other end of the second movable part is inserted into the locking position through an elastic pin to lock the main support rod. In the closed state, the main support rod rotates closer to the main frame body, and the other end of the second movable part is inserted into the latch through an elastic pin to lock the first movable part.

9. An LED display screen as described in claim 8, characterized in that, The first movable component has a sleeve at its end, through which the main support rod passes and is fixed to the inner wall of the sleeve. The second movable component has an elastic pin at its end, and the sleeve has a through hole corresponding to the locking position. When the windproof frame of the display screen is opened, the elastic pin passes through the through hole and locks into the locking position. The second movable component has a semi-circular claw at its end, with the semi-circular inner surface of the claw contacting the outer wall of the sleeve. The semi-circular claw has a pin limiting groove and a pin hole communicating with the pin limiting groove. The elastic pin is installed on the... The aforementioned pin limiting groove, wherein the elastic pin includes an elastic element, an unlocking button, and a pin extending into the pin hole, the unlocking button being fixed to the pin, one end of the elastic element acting on the pin, and the other end acting on the semi-circular claw portion; the latch has a through hole, and when the display screen windproof frame is retracted, the surface of the second movable element facing the frame body is in contact with the surface of the first movable element facing away from the frame body, and the center line of the through hole coincides with the center line of the elastic pin so that the elastic pin can be aligned and inserted into the through hole.

10. An LED display screen as described in claim 8, characterized in that, The wind-resistant frame for the display screen also includes a secondary support assembly. The secondary support assembly has a T-shaped structure and includes a horizontal portion and a vertical portion that is perpendicularly connected to the horizontal portion. The two ends of the horizontal portion are respectively connected to the middle portions of the two first movable parts, and the vertical portion is connected to the middle portion of the first mounting position.

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