A lock catch assembly and LED display for a control box

Abstract

The utility model relates to a kind of lock catch assembly of LED display screen and control box, the control box is housed in the back of the box frame assembly of display screen;Control box includes upper cover and bottom cover, lock catch assembly includes buckle, the box frame assembly is equipped with the buckle position of buckle buckle;Buckle includes upper fastener, installation base plate, first pivot, limit board and elastic member;The upper fastener is housed on the installation base plate by the first pivot, elastic member has first end and second end, the limit board is located between the first end of the elastic member and first pivot, the second end of elastic member is on the lock catch assembly, the upper fastener has buckle part to be able to buckle in the buckle position, when the upper fastener buckle in the buckle position the elastic member is in compression state, the elastic member is after releasing the upper fastener act on limit board to make limit board limit the first pivot.Control box can be quickly housed in box frame assembly by buckle, disassembly and installation are very convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of LED display technology, specifically to a locking assembly for a control box and an LED display. Background Technology

[0002] Currently, large outdoor LED displays have various applications, such as advertising displays and rental displays. Among them, rental displays are usually rented in various locations, which inevitably requires frequent moving, disassembly, and installation. Therefore, for easy handling, they need to be made thin and light, and for easy assembly and disassembly, they need to adopt a structure that is easy to disassemble and assemble, while also saving time and facilitating operation.

[0003] LED displays typically consist of LED display modules, cabinet frame components, and control boxes. To facilitate assembly and disassembly, the LED display modules and cabinet frame components are assembled together using magnetic attraction, while the control boxes are usually fastened to the cabinet frame components, making assembly relatively inconvenient. Utility Model Content

[0004] In view of this, a locking assembly for a control box and an LED display screen that are easy and quick to install and remove are provided.

[0005] A locking assembly for a control box used for a display screen; the control box is mounted on the back of a cabinet frame assembly of the display screen; the control box includes a top cover and a bottom cover, the locking assembly includes a latch, and the cabinet frame assembly has a latching position for the latch to engage; the latch includes an upper fastener, a mounting base plate, a first rotating shaft, a limiting plate, and an elastic member; the upper fastener is mounted on the mounting base plate via the first rotating shaft, the elastic member has a first end and a second end, the limiting plate is disposed between the first end of the elastic member and the first rotating shaft, the second end of the elastic member abuts against the locking assembly, the upper fastener has a latching portion to engage with the latching position, the elastic member is under pressure when the upper fastener is engaged with the latching position, and the elastic member acts on the limiting plate after releasing the upper fastener to restrict the first rotating shaft.

[0006] Specifically, the mounting base plate includes a base plate and two side plates disposed on both sides of the base plate. The two side plates are respectively provided with V-shaped grooves or V-shaped holes at opposite positions. The two ends of the first rotating shaft are respectively disposed in the V-shaped grooves or V-shaped holes of the two side plates. The two ends of the first rotating shaft are respectively provided with protruding rings. Each protruding ring is locked outside the V-shaped groove or V-shaped hole. The first rotating shaft can slide back and forth on the V-shaped inclined wall of the V-shaped groove or V-shaped hole.

[0007] Specifically, the limiting plate includes a vertical plate, a top plate, and two side baffles. One side of the vertical plate abuts against the elastic member, and the other side abuts against the first rotating shaft. The top plate is located above the first rotating shaft to limit the height of the first rotating shaft's upward movement. The two side baffles are located on both sides of the elastic member.

[0008] Preferably, the elastic element is a spring and there are two springs arranged side by side; the mounting base plate is provided with a stop at a predetermined distance from the first rotating shaft, and the two ends of each elastic element act on the limiting plate and the stop respectively.

[0009] Furthermore, the buckle also includes a middle cover, and the stop is a second pivot, which is parallel to the first pivot. The two ends of the second pivot are respectively mounted on the two side plates. The middle cover has two lower edge plates, which are respectively attached to the outer sides of the two side plates. The two lower edge plates are respectively provided with a front axle hole and a rear axle hole. Each front axle hole is an oblong hole. The second pivot passes through the two side plates and is mounted in the rear axle hole. The first pivot passes through the front axle hole. The front axle hole is engaged with the inner side of the convex ring and the outer side of the side plate of the mounting base plate.

[0010] Furthermore, the upper fastener has two rotating feet extending rearward from one end, which are respectively rotatably mounted on the two first rotating shafts and fit against the outer side of the middle cover; the fastening part is a fastening tongue; the fastening tongue is located at the other end of the upper fastener away from the rotating feet and extends horizontally inward; the middle cover has an upwardly extending rear stop, and the middle cover also has a lower extension at the end near the fastening position, the second end of the elastic member abuts against the lower extension, the lower extension has a sleeve post, and the spring is sleeved on the sleeve post; the upper fastener has a waist located between the two rotating feet, and the height of the rear stop protruding from the middle cover body is greater than the distance between the waist and the first rotating shaft so that when the upper fastener is lifted, the waist can rest against the rear stop.

[0011] Furthermore, an LED display screen includes an LED display module, a cabinet frame assembly, and a control box. The LED display module is mounted on the front side of the cabinet frame assembly, and the control box is mounted on the back side of the cabinet frame assembly. The control box is mounted on the back side of the cabinet frame assembly via a locking assembly as described above. The control box includes an upper cover and a bottom cover. The upper cover is provided with the latch, and the cabinet frame assembly is provided with a fastening position for the latch to engage.

[0012] Preferably, the upper cover is provided with a plurality of buckles, which are evenly distributed around the upper cover; there are a plurality of buckle positions, each of which includes a buckle groove or a hook; the groove wall of the buckle groove has an inner groove; the hook of the hook extends in the opposite direction to the buckle extension direction to form an interlocking structure, and the buckle part of each upper fastener can be inserted into and locked in the inner groove.

[0013] Furthermore, the control box also has a drive board located between the upper cover and the bottom cover. The drive board has multiple signal line interfaces, and the bottom cover has multiple through holes, each corresponding to a signal line interface passing through. The housing frame assembly has a middle frame with the fasteners. When the control box is mounted on the middle frame, the middle frame has multiple alignment holes corresponding to the through holes. Each through hole has a post protruding from the bottom cover, and the post is fitted with a silicone waterproof ring.

[0014] Furthermore, the enclosure frame assembly includes a 90-degree locking rod assembly; the 90-degree locking rod assembly includes a left lock cylinder and a right lock member respectively located on the left and right sides, the left lock cylinder and the right lock member being locked in place respectively; the enclosure frame assembly also includes a multi-angle rotary lock assembly, a flat lock, an upper lock cylinder and a lower lock seat; the multi-angle rotary lock assembly includes a left push rod and a right rotary seat respectively located on the left and right sides; the left push rod and the right rotary seat are locked in place respectively, and the upper lock cylinder and the lower lock seat are locked in place respectively; the flat lock includes a left insert cylinder and a right lock seat that can lock into each other; the 90-degree locking rod The component is offset inward by a predetermined span relative to the multi-angle rotary lock assembly, flat lock, upper lock cylinder, and lower lock seat on the same side so that when the box frame assembly is installed at a 90-degree angle, the left and right components of the multi-angle rotary lock assembly, flat lock, upper lock cylinder, and lower lock seat are respectively avoided; the box frame assembly also includes a climbing handle, an upper handle, a left handle, and a right handle; the climbing handle is located on the lower frame edge of the box frame assembly; the upper surface of the climbing handle has an anti-slip texture and its thickness is greater than that of the upper handle and the left handle; the upper handle is located on the upper frame edge of the box frame assembly.

[0015] In the aforementioned locking assembly of the LED display screen and control box, the control box can be quickly mounted onto the cabinet frame assembly via a latch, and the upper latch can be lifted for easy and quick disassembly. Furthermore, the latch has an elastic element; when the latch is released, the upper latch lifts upwards, at which point the elastic element abuts against the first pivot, keeping the upper latch away from its original position and preventing it from becoming entangled in the cabinet frame assembly when the other latches are released. In addition, the rear stop of the middle cover allows the upper latch to rest, making it less likely to fall back into its original position, thus providing greater convenience for disassembly. Attached Figure Description

[0016] Figure 1This is a three-dimensional structural diagram of an LED display screen provided in an embodiment of the present utility model.

[0017] Figure 2 for Figure 1 A three-dimensional exploded view of the LED display screen.

[0018] Figure 3 for Figure 1 A three-dimensional exploded view of the LED display screen from another perspective.

[0019] Figure 4 for Figure 1 An exploded three-dimensional structural diagram of the control box for an LED display screen.

[0020] Figure 5 for Figure 1 A three-dimensional exploded view of the control box for the LED display screen from another perspective.

[0021] Figure 6 for Figure 1 A three-dimensional structural diagram of the locking assembly on the control box of the LED display screen.

[0022] Figure 7 for Figure 1 An exploded three-dimensional structural diagram of the locking assembly on the control box of the LED display screen.

[0023] Figure 8 for Figure 1 A three-dimensional exploded view of the locking assembly on the control box of the LED display screen from another perspective.

[0024] Figure 9 for Figure 3 A magnified schematic diagram of part A in the middle.

[0025] Figure 10 For two Figure 1 A schematic diagram of the right-angle splicing structure of an LED display screen.

[0026] In the attached image: 10. Buckle; 100. Control box; 101. Top cover; 102. Bottom cover; 103. Wiring hole; 104. Hole post; 105. Silicone waterproof ring; 107. Upper lock cylinder; 108. Lower lock seat; 109. Drive plate; 11. Upper fastener; 115. Waist; 116. Rotating shaft hole; 15. Rotating foot; 16. Buckle tongue; 20. Mounting base plate; 201. Fixing hole; 22. Side plate; 24. Spring; 27. V-groove; 31. First rotating shaft; 32. Second rotating shaft; 35. Middle cover; 351. Rear stop; 352. Lower extension. 353. Sleeve post; 36. Lower edge plate; 37. Front axle hole; 38. Rear axle hole; 40. Limiting plate; 41. Vertical plate; 42. Top plate; 43. Side baffle; 54. Signal line interface; 71. Left lock cylinder; 73. Right lock piece; 75. Flat lock; 76. Left mortise cylinder; 77. Right lock seat; 80. Box frame assembly; 82. Middle frame; 83. Hook; 84. Alignment hole; 85. Climbing handle; 86. Top handle; 87. Left handle; 88. Right handle; 91. Multi-angle rotary lock assembly; 92. Left push rod; 93. Right rotary seat. Detailed Implementation

[0027] 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.

[0028] Please see Figures 1 to 6This illustration shows a locking assembly for an LED display screen and a control box according to an embodiment of the present invention. The LED display screen includes an LED display module 19, a housing frame assembly 80, and a control box 100. The LED display module 19 is mounted on the front of the housing frame assembly 80, and the control box 100 is mounted on the back of the housing frame assembly 80. The control box 100 includes an upper cover 101 and a bottom cover 102. The locking assembly includes a latch 10, and the housing frame assembly 80 has a latching position for the latch 10 to engage. The latch 10 includes an upper fastener 11, a mounting base plate 20, a first rotating shaft 31, a limiting plate 40, and an elastic member. The upper fastener 11 is mounted on the mounting base plate 20 via the first rotating shaft 31. The elastic member has a first end and a second end. The limiting plate 40 is located between the first end of the elastic member and the first rotating shaft 31. The second end of the elastic member abuts against the locking assembly. In this embodiment, the second end of the elastic member abuts against the end of the latching position near the 35. The upper fastener 11 has a fastening portion that can be fastened to the fastening position. When the upper fastener 11 is fastened to the fastening position, the elastic element is in a compressed state. After the upper fastener 11 is released, the elastic element acts on the limiting plate 40 so that the limiting plate 40 abuts against the first rotating shaft 31. In use, the limiting plate 40 is held against the first rotating shaft 31 by the elastic element. When the upper fastener 11 is released from the fastening position, the elastic element will continue to abut against the first rotating shaft 31. On the one hand, it can push the first rotating shaft 31 away from the fastening position. On the other hand, it also restricts the rotation of the first rotating shaft 31 to a certain extent, which can prevent the upper fastener 11 from falling back and maintain a relatively upright position, which facilitates the next fastening and installation operation.

[0029] In some specific embodiments, such as Figures 6 to 8 As shown, the mounting base plate 20 includes a base plate and two side plates 22 disposed on both sides of the base plate. The two side plates 22 are respectively provided with V-shaped grooves or V-shaped holes at opposite positions. The two ends of the first rotating shaft 31 are respectively disposed in the V-shaped grooves or V-shaped holes of the two side plates 22. The two ends of the first rotating shaft 31 are respectively provided with protruding rings, each of which is engaged outside the V-shaped groove or V-shaped hole. The first rotating shaft 31 can slide back and forth along the V-shaped inclined wall of the V-shaped groove or V-shaped hole. In this embodiment, the V-shaped groove 27 is shown in the figure. On one hand, it provides guidance and space for the first rotating shaft 31 to move back and forth; on the other hand, it provides vertical space for the first rotating shaft 31, thus giving the upper fastener 11 considerable flexibility and freedom when fastened downwards.

[0030] Preferably, the limiting plate 40 includes a vertical plate 41, a top plate 42, and two side baffles 43. One side of the vertical plate 41 abuts against the elastic member, and the other side abuts against the first rotating shaft 31. The top plate 42 is located above the first rotating shaft 31 to limit the upward movement height of the first rotating shaft 31. The two side baffles 43 are respectively located on both sides of the elastic member. When the upper fastener 11 is active, the first rotating shaft 31 moves in the V-groove or V-hole. At this time, the limiting plate 40 provides the upper part of the first rotating shaft 31 with a top pressure and the forward elastic pressure, thereby limiting the upward movement range of the first rotating shaft and the degree of suppressed (requiring overcoming the elastic force) movement towards the fastener. The two side baffles 43 can limit the predetermined space on both sides of the elastic member or limit the offset of the elastic member to both sides.

[0031] In some preferred embodiments, the elastic element is a spring 24, and there are two springs 24 arranged side by side. The mounting base plate 20 is provided with a stop at a predetermined distance from the first rotating shaft 31. The two ends of each elastic element act on the limiting plate 40 and the stop, respectively. Two side baffles 43 are located on both sides of the two springs 24. The two springs 24 can provide sufficient elastic force and are durable. At the same time, since the two springs 24 provide two forces in the same direction, the action is more stable and reliable when the two springs 24 act in the same direction at the same time. This provides strong retention for the locking and unlocking of the upper fastener 11 and the stable and reliable operation after unlocking, and brings a skillful, stable, convenient, safe and reliable user experience.

[0032] In some specific embodiments, the buckle 10 further includes a middle cover 35, the stop is a second pivot 32, the second pivot 32 is parallel to the first pivot 31; the two ends of the second pivot 32 are respectively mounted on the two side plates 22; the middle cover 35 has two lower edge plates 36, the two lower edge plates 36 are respectively attached to the outer side of the two side plates 22, preferably, the sides of the two lower edge plates 36 that are attached to the two side plates 22 are smooth surfaces. The two lower edge plates 36 are respectively provided with a front axle hole 37 and a rear axle hole 38. Each front axle hole 37 is an oblong hole, which has a predetermined length in the direction of the elastic force or in the direction of the upper fastener moving towards the fastening position, so that the upper fastener 11 can be pulled closer to the fastening position and retracted to provide a predetermined horizontal stroke. At the same time, the middle cover 35 itself is mounted on the mounting base 20 closer to the fastening position via the second pivot 32. The middle cover and its mounting structure enable it to cooperate with the upper fastener 11 in movement. For example, when the upper fastener 11 is released, the middle cover 35 will restrict the movement of the upper fastener 11 to a certain extent, because the middle cover 35 can only rotate around the second pivot 32. Meanwhile, the front axle hole 37 of the oblong hole provides a forward and backward movement stroke. The second pivot 32 passes through the two side plates 22 and is mounted in the rear axle hole 38; the first pivot 31 passes through the front axle hole 37; the front axle hole 37 is engaged with the inner side of the convex ring and the outer side of the side plate 22 of the mounting base 20. The upper fastener 11 has a pivot hole 116, and the front pivot hole 37 corresponds to the pivot hole 116, allowing the first pivot 31 to pass through. The mounting base plate 20 of the upper fastener 11 also has a fixing hole 201, through which the entire locking assembly is mounted on the upper cover 101 of the control box 100 with fasteners.

[0033] In some specific embodiments, the upper fastener 11 has two rotating feet 15 extending rearward from one end. The two rotating feet 15 are rotatably mounted on the two first rotating shafts 31, respectively, and are attached to the outer side of the middle cover 35. The fastening part is a fastening tongue 16. The fastening tongue 16 is located at the other end of the upper fastener 11 away from the rotating feet 15 and extends horizontally inward, essentially extending inward parallel to the direction of the elastic force. It can also be appropriately tilted, the main purpose being to provide a firm grip, ensuring the control box is securely mounted on the housing frame assembly 80. Furthermore, the middle cover 35 has an upwardly extending rear stop 351. The middle cover 35 also has a lower extension 352 near the fastening position. The second end of the elastic element abuts against the lower extension 352. The lower extension 352 has a sleeve post 353, and the spring is sleeved on the sleeve post 353. The sleeve posts 353 are generally horizontally positioned or parallel to the extension direction of the latch tongue, and preferably there are two, each sleeved onto one of the two sleeve posts 353. The upper fastener 11 has a waist portion 115 located between the two rotating feet 15. The rear stop portion 351 protrudes from the body of the middle cover 35 at a height greater than the distance between the waist portion 115 and the first rotating shaft 31, so that when the upper fastener 11 is lifted, the waist portion 115 can rest against the rear stop portion 351. In this way, the waist portion 115 and the entire upper fastener 11 can rest against the rear stop portion 351 of the middle cover 35. Preferably, the rear stop portion 351 extends obliquely backward, so that the upper fastener can lean backward when resting, making it less likely to fall back into the fastening position.

[0034] Preferably, the control box 100 is mounted on the back of the housing frame assembly 80 via the locking assembly of the display control box 100 as described above. The control box 100 includes an upper cover 101 and a bottom cover 102. The upper cover 101 is provided with the buckle 10, and the housing frame assembly 80 is provided with a fastening position for the buckle 10 to be fastened.

[0035] In a specific embodiment, the upper cover 101 is provided with a plurality of the aforementioned buckles 10, such as... Figures 1 to 3 As shown, multiple buckles 10 are evenly distributed around the upper cover 101; the example shown has four. There are multiple fastening positions, corresponding to the number and position of the buckles 10. Figure 9 As shown, each of the fastening positions includes a fastening groove or a hook 83; the groove wall of the fastening groove has an inner groove; the example shown is a hook 83. Figure 2 and Figure 9 As shown, the hook portion of the hook 83 extends in the opposite direction to the buckle portion to form an interlocking structure, and the buckle portion of each upper fastener 11 can be inserted into and locked into the inner groove. The hook 83 is integrally formed into the box frame assembly 80.

[0036] In addition, the control box 100 also has a drive board 109, which is located between the upper cover 101 and the bottom cover 102. The drive board 109 has multiple signal line interfaces 54, and the bottom cover 102 has multiple wire holes 103, each of which corresponds to a signal line interface 54 passing through. The box frame assembly 80 has a middle frame 82, which has the fasteners. When the control box 100 is mounted on the middle frame 82, the middle frame 82 has multiple alignment holes 84 corresponding to the wire holes 103. Each wire hole 103 has a post 104 protruding from the bottom cover 102, and the post 104 is fitted with a silicone waterproof ring 105 to improve the sealing and waterproof performance.

[0037] Furthermore, the box frame assembly 80 includes a 90-degree locking rod assembly; the 90-degree locking rod assembly includes a left lock cylinder 71 and a right lock member 73 respectively disposed on the left and right sides, the left lock cylinder 71 and the right lock member 73 respectively locking in place; for the specific structure of the 90-degree locking rod assembly, please refer to the invention patent application filed by the same applicant on April 23, 2023, with application number 202310466758.3, entitled "Multifunctional Chamfered Box Device". This allows two identical box frame assemblies 80 to be formed as follows: Figure 10 The diagram shows a right-angle splicing structure. The box frame assembly 80 also includes a multi-angle rotary lock assembly 91, a flat lock, an upper lock cylinder 107, and a lower lock seat 108; the multi-angle rotary lock assembly 91 has a left push rod 92 and a right rotary seat 93 on the left and right sides respectively; the left push rod 92 and the right rotary seat 93 are respectively locked, and the upper lock cylinder 107 and the lower lock seat 108 are respectively locked; the flat lock includes a left insert 76 and a right lock seat 77 that can lock with each other; the 90-degree lock rod assembly is oriented inward relative to the multi-angle rotary lock assembly 91, the flat lock, the upper lock cylinder 107, and the lower lock seat 108 on the same side. The predetermined span is offset so that when the box frame assembly 80 is installed at a 90-degree angle, the left and right components of the multi-angle rotary lock assembly 91, the flat lock, the upper lock cylinder 107, and the lower lock seat 108 are respectively avoided; the box frame assembly 80 also includes a climbing handle 85, an upper handle 86, a left handle 87, and a right handle 88; the climbing handle 85 is located on the lower frame edge of the box frame assembly 80; the upper surface of the climbing handle 85 is provided with an anti-slip texture and its thickness is greater than that of the upper handle 86 and the left handle 87; the upper handle 86 is located on the upper frame edge of the box frame assembly 80.

[0038] 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. A locking assembly for a control box, the control box being used for a display screen; the control box being mounted on the back of a cabinet frame assembly of the display screen; the control box comprising a top cover and a bottom cover, characterized in that, The locking assembly includes a latch, and the housing frame assembly has a latching position for the latch to engage. The latch includes an upper fastener, a mounting base, a first rotating shaft, a limiting plate, and an elastic element. The upper fastener is mounted on the mounting base via the first rotating shaft. The elastic element has a first end and a second end. The limiting plate is located between the first end of the elastic element and the first rotating shaft. The second end of the elastic element abuts against the locking assembly. The upper fastener has a latching portion that can engage with the latching position. When the upper fastener is engaged with the latching position, the elastic element is under pressure. After releasing the upper fastener, the elastic element acts on the limiting plate to restrict the first rotating shaft.

2. The locking assembly of the control box as described in claim 1, characterized in that, The mounting base plate includes a base plate and two side plates disposed on both sides of the base plate. The two side plates are respectively provided with V-shaped grooves or V-shaped holes at opposite positions. The two ends of the first rotating shaft are respectively disposed in the V-shaped grooves or V-shaped holes of the two side plates. The two ends of the first rotating shaft are respectively provided with convex rings. Each convex ring is locked outside the V-shaped groove or V-shaped hole. The first rotating shaft can slide back and forth on the V-shaped inclined wall of the V-shaped groove or V-shaped hole.

3. The locking assembly of the control box as described in claim 1, characterized in that, The limiting plate includes a vertical plate, a top plate, and two side baffles. One side of the vertical plate abuts against the elastic member, and the other side abuts against the first rotating shaft. The top plate is located above the first rotating shaft to limit the height of the first rotating shaft's upward movement. The two side baffles are located on both sides of the elastic member.

4. The locking assembly of the control box as described in claim 2, characterized in that, The elastic element is a spring, and there are two springs arranged side by side; the mounting base plate is provided with a stop at a predetermined distance from the first rotating shaft, and the two ends of each elastic element act on the limiting plate and the stop respectively.

5. The locking assembly of the control box as described in claim 4, characterized in that, The buckle also includes a middle cover, and the stop is a second pivot, which is parallel to the first pivot. The two ends of the second pivot are respectively mounted on the two side plates. The middle cover has two lower edge plates, which are respectively attached to the outer sides of the two side plates. The two lower edge plates are respectively provided with a front axle hole and a rear axle hole. Each front axle hole is an oblong hole. The second pivot passes through the two side plates and is mounted in the rear axle hole. The first pivot passes through the front axle hole. The front axle hole is engaged with the inner side of the convex ring and the outer side of the side plate of the mounting base.

6. The locking assembly of the control box as described in claim 5, characterized in that, The upper fastener has two rotating feet extending rearward from one end. The two rotating feet are rotatably mounted on the two first rotating shafts respectively, and the two rotating feet are in contact with the outer side of the middle cover. The fastening part is a fastening tongue. The fastening tongue is located at the other end of the upper fastener away from the rotating feet and extends horizontally inward. The middle cover has an upwardly extending rear stop. The middle cover also has a lower extension at the end near the fastening position. The second end of the elastic member abuts against the lower extension. The lower extension has a sleeve post, and the spring is sleeved on the sleeve post. The upper fastener has a waist located between the two rotating feet. The height of the rear stop protruding from the middle cover body is greater than the distance between the waist and the first rotating shaft so that when the upper fastener is raised, the waist can rest against the rear stop.

7. An LED display screen, comprising an LED display module, a cabinet frame assembly, and a control box, wherein the LED display module is assembled on the front side of the cabinet frame assembly, and the control box is mounted on the back side of the cabinet frame assembly; characterized in that, The control box is mounted on the back of the housing frame assembly via a locking assembly of the control box as described in any one of claims 1-6. The control box includes an upper cover and a bottom cover. The upper cover is provided with the buckle, and the housing frame assembly is provided with a fastening position for the buckle to engage.

8. The LED display screen as described in claim 7, characterized in that, The upper cover is provided with a plurality of buckles, which are evenly distributed around the perimeter of the upper cover; there are a plurality of buckle positions, each of which includes a buckle groove or a hook; the groove wall of the buckle groove has an inner groove; the hook of the hook extends in the opposite direction to the buckle extension direction to form an interlocking structure, and the buckle of each upper fastener can be inserted into and locked in the inner groove.

9. The LED display screen as described in claim 7, characterized in that, The control box also has a drive board located between the upper cover and the bottom cover. The drive board has multiple signal line interfaces, and the bottom cover has multiple through holes, each corresponding to a signal line interface. The housing frame assembly has a middle frame with the fasteners. When the control box is mounted on the middle frame, the middle frame has multiple alignment holes corresponding to the through holes. Each through hole has a post protruding from the bottom cover, and the post is fitted with a silicone waterproof ring.

10. The LED display screen as described in claim 7, characterized in that, The enclosure frame assembly includes a 90-degree locking rod assembly; the 90-degree locking rod assembly includes a left lock cylinder and a right lock piece respectively located on the left and right sides, the left lock cylinder and the right lock piece being locked in place respectively; the enclosure frame assembly also includes a multi-angle rotary lock assembly, a flat lock, an upper lock cylinder and a lower lock seat; the multi-angle rotary lock assembly includes a left push rod and a right rotary seat respectively located on the left and right sides; the left push rod and the right rotary seat are locked in place respectively, and the upper lock cylinder and the lower lock seat are locked in place respectively; the flat lock includes a left insert cylinder and a right lock seat that can lock into each other; the 90-degree locking rod assembly... The multi-angle rotary lock assembly, flat lock, upper lock cylinder, and lower lock seat on the same side are offset inward by a predetermined span so that when the box frame assembly is installed at a 90-degree angle, the left and right components of the multi-angle rotary lock assembly, flat lock, upper lock cylinder, and lower lock seat can avoid each other; the box frame assembly also includes a climbing handle, an upper handle, a left handle, and a right handle; the climbing handle is located on the lower frame edge of the box frame assembly; the upper surface of the climbing handle has an anti-slip texture and its thickness is greater than that of the upper handle and the left handle; the upper handle is located on the upper frame edge of the box frame assembly.

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