Connecting lock capable of adjusting splicing angle and LED display screen

Abstract

The invention belongs to the technical field of LED display, and relates to a connecting lock capable of adjusting the splicing angle and an LED display screen, and the connecting lock comprises a first connecting piece, a second connecting piece, an angle adjusting block, a rotating shaft assembly and a lock rod assembly; the second connecting piece is fixedly connected with the angle adjusting block; the first connecting piece is rotationally connected with the angle adjusting block through a rotating shaft assembly. The lock rod assembly comprises a lock rod body, the first connecting piece is provided with a plurality of composite holes around the rotating shaft assembly, and the lock rod body penetrates through the angle adjusting block to be in locking fit with the composite holes so that the first connecting piece and the angle adjusting block can be locked together. Due to the fact that the connecting lock is provided with the first connecting piece and the second connecting piece which are independent of each other, when the first connecting piece and the angle adjusting block are unlocked, the first connecting piece can be rotated, and the splicing angle of the display box body which is fixed with the first connecting piece and the second connecting piece respectively is changed. And the splicing requirement of the special-shaped screen cannot be met.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a connection lock with adjustable splicing angle and an LED display screen. Background Art

[0002] An LED display is a flat panel display used to display text, images, video, and recordings. It's widely used in a variety of applications, including outdoor advertising and product image display. LED displays are typically constructed from multiple LED display cabinets spliced ​​together. Connectors are used to connect adjacent LED display units on the back to improve flatness. Bolts secure the connectors to the small LED display.

[0003] Existing connectors typically consist of a sheet-like body and multiple bolts, which securely connect two or four adjacent LED display cabinets together. For example, Chinese patent number CN202121802155.9 discloses a quick-locking connector mechanism for assembling LED display cabinets. However, due to its fixed structure, this connector is typically used for splicing conventional flat-panel displays. However, for special-shaped screens that may need to be spliced ​​at various splicing angles, this connector is difficult to meet the splicing requirements. Summary of the Invention

[0004] (1) Technical issues to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a connection lock and an LED display screen with adjustable splicing angle, which solves the technical problem that the existing connection pieces cannot adapt to the splicing requirements of special-shaped screens due to their fixed structure.

[0006] (2) Technical solution

[0007] In order to achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] In a first aspect, an embodiment of the present invention provides a connection lock with adjustable splicing angle, which is used to connect the back surfaces of two display cabinets to adjust and lock the splicing angle of the two display cabinets, and includes a first connection piece, a second connection piece, an angle adjustment block, a rotating shaft assembly, and a locking rod assembly; the second connection piece is fixedly connected to the angle adjustment block; the first connection piece and the angle adjustment block are rotatably connected together via the rotating shaft assembly;

[0009] The locking rod assembly includes a locking rod body, which is rotatably installed in the angle adjustment block. The first connecting piece is provided with several composite holes around the rotating shaft assembly. The locking rod body passes through the angle adjustment block and is locked with the composite holes to lock the first connecting piece and the angle adjustment block together.

[0010] Optionally, the composite hole includes a hemispherical segment and a threaded segment from front to back, and the rear end of the locking rod body is provided with an external thread. The locking rod body is used to be threadedly connected to the threaded segment of any composite hole to lock the first connecting piece; a positioning bead is fixedly installed on the rear side of the angle adjustment block, and the positioning bead is placed in the hemispherical segment of any composite hole that is not currently matched with the locking rod body. The distance from the locking rod body to the rotating shaft assembly is equal to the distance from the positioning bead to the rotating shaft assembly.

[0011] Optionally, two positioning beads are provided, and the two positioning beads are symmetrically arranged about the rotating shaft assembly.

[0012] Optionally, a handle is installed at the front end of the locking rod body, the locking rod body is inserted into the handle, and the two are fixedly connected together by a latch.

[0013] Optionally, the locking rod assembly further includes a spring, which is sleeved on the locking rod body and placed between the handle and the angle adjustment block.

[0014] Optionally, the first connecting piece includes a box connection area and an angle adjustment area, the box connection area is used to connect to the display box, the angle adjustment area is circular, a connecting through-hole is provided at the center of the circle, and composite holes are evenly provided around the connecting through-hole; the angle adjustment block is provided with a connecting through-hole; the shaft assembly includes an internal threaded column, a connecting piece and a gasket, the internal threaded column passes through the connecting through-hole and the connecting through-hole in turn, the connecting piece passes through the gasket and is screwed into the internal threaded column, and the gasket is pressed against the back of the angle adjustment area through a threaded connection.

[0015] Optionally, the second connecting piece is provided with a positioning hole; the angle adjustment block is provided with a positioning column, the positioning column is inserted into the positioning hole, and the second connecting piece and the angle adjustment block are connected together by bolts.

[0016] In a second aspect, an embodiment of the present invention provides an LED display screen, comprising a display box and the aforementioned connecting lock, wherein the backs of two adjacent display boxes are connected together via the connecting lock.

[0017] (3) Beneficial effects

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention provides a connecting lock and LED display screen with adjustable splicing angle. Since the connecting lock is provided with a first connecting piece and a second connecting piece that are independent of each other, the second connecting piece is fixedly connected to the angle adjustment block; the first connecting piece and the angle adjustment block are rotatably connected together through a rotating shaft assembly and are locked by a locking rod assembly. When the first connecting piece and the angle adjustment block are unlocked, the first connecting piece can be rotated to change the angle between the first connecting piece and the second connecting piece, thereby changing the splicing angle of the display box respectively connected to the first connecting piece and the second connecting piece. Compared with the existing technology, it solves the technical problem that the existing connecting pieces cannot adapt to the splicing requirements of special-shaped screens due to their fixed structure, thereby improving the splicing flexibility of the LED display screen.

[0020] 2. The angle adjustment block is provided with a positioning bead, and the first connecting piece is provided with multiple composite holes. The composite holes include a hemispherical segment and a threaded segment from front to back. The locking rod body can be locked with the threaded segment of any composite hole. The positioning bead is positioned with the hemispherical segment of any composite hole that is not currently matched with the locking rod body. When the locking rod body is rotated to withdraw the locking rod body from the composite hole, the first connecting piece and the angle adjustment block are unlocked, and the first connecting piece can be rotated to change the splicing angle of the display box fixed with the first connecting piece. Then the locking rod body is screwed to lock the first connecting piece to fix the splicing angle, thereby realizing the special-shaped splicing of two adjacent display boxes. The operation is simple and convenient.

[0021] 3. A circle of composite holes is set around the rotating shaft assembly. The positions of the positioning beads and the lock rod body correspond to the composite holes. Therefore, the composite holes can be used to cooperate with the positioning beads for positioning and can also be locked with the lock rod body, making the structure of the connecting lock more streamlined and compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional schematic diagram (front view) of a connecting lock with adjustable splicing angle and a connecting lock of an LED display screen embodiment 1 of the present invention;

[0023] Figure 2 This is an exploded schematic diagram (front view) of a connecting lock with adjustable splicing angle and a connecting lock of an LED display screen embodiment 1 of the present invention;

[0024] Figure 3 This is a three-dimensional schematic diagram of a connecting lock with adjustable splicing angle and a connecting lock of an LED display screen embodiment 1 of the present invention (backward facing);

[0025] Figure 4 This is an exploded schematic diagram of a connecting lock with adjustable splicing angle and a connecting lock of an LED display screen embodiment 1 of the present invention (backward facing);

[0026] Figure 5This is a front view schematic diagram of a connecting lock with adjustable splicing angle and a connecting lock of an LED display screen embodiment 1 of the present invention;

[0027] Figure 6 This is a rear view schematic diagram of a connecting lock with adjustable splicing angle and a connecting lock of an LED display screen embodiment 1 of the present invention;

[0028] Figure 7 for Figure 6 Schematic cross-sectional view at AA in the middle;

[0029] Figure 8 for Figure 7 Enlarged schematic diagram of point C in the middle;

[0030] Figure 9 for Figure 6 Schematic cross-sectional view at the middle BB;

[0031] Figure 10 This is a schematic diagram of an LED display screen according to Embodiment 2 of a connecting lock with adjustable splicing angle of the present invention and an LED display screen.

[0032] [Description of Reference Numerals]

[0033] 1. First connecting piece; 11. Box connecting area; 12. Angle adjustment area; 121. Connecting through hole; 122. Composite hole;

[0034] 2. Second connecting piece; 21. Positioning hole;

[0035] 3. Angle adjustment block; 31. Positioning bead; 32. Positioning column; 33. Lock rod connection hole; 331. Front hole; 332. Middle hole; 333. Rear hole; 34. Connection hole;

[0036] 4. Lock rod assembly; 41. Handle; 42. Lock rod body; 421. Head; 422. Neck; 423. Threaded rod; 43. Spring;

[0037] 5. Rotating shaft assembly; 51. Internal threaded column; 52. Connector; 53. Gasket;

[0038] 100. Connection lock; 200. Display box. DETAILED DESCRIPTION

[0039] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below with reference to the accompanying drawings and through specific embodiments. Figure 7 The orientation of is used as a reference, with the direction of the handle 41 being the "front" and the direction of the angle adjustment block 3 being the "back".

[0040] The embodiment of the present invention proposes a connecting lock and LED display screen with adjustable splicing angle, wherein the connecting lock is used to connect two display boxes, adjust and lock the splicing angle of the two display boxes, and includes a first connecting piece, a second connecting piece, an angle adjustment block, a rotating shaft assembly and a locking rod assembly; the second connecting piece is fixedly connected to the angle adjustment block; the first connecting piece and the angle adjustment block are rotatably connected together through the rotating shaft assembly; the locking rod assembly includes a locking rod body, the first connecting piece is provided with a plurality of composite holes around the rotating shaft assembly, and the locking rod body passes through the angle adjustment block and is tightly matched with the composite holes to lock the first connecting piece and the angle adjustment block together; since the connecting lock is provided with a first connecting piece and a second connecting piece that are independent of each other, when the first connecting piece and the angle adjustment block are unlocked, the first connecting piece can be rotated, thereby changing the angle between the first connecting piece and the second connecting piece, thereby changing the splicing angle of the display boxes respectively connected to the first connecting piece and the second connecting piece, and its beneficial effect is that it solves the technical problem that the existing connecting pieces cannot adapt to the splicing requirements of special-shaped screens due to their fixed structure.

[0041] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0042] Example 1:

[0043] Reference Figures 1 to 4 , this embodiment 1 provides a connecting lock with adjustable splicing angle, the connecting lock 100 is used to connect the right-angle position of the back of two adjacent display boxes 200, adjust and lock the splicing angle of the two display boxes 200, and includes a first connecting piece 1, a second connecting piece 2, an angle adjustment block 3, a rotating shaft assembly 5 and a locking rod assembly 4.

[0044] See Figures 5 to 7The second connecting piece 2 is fixedly connected to the angle adjustment block 3; the first connecting piece 1 is rotatably connected to the angle adjustment block 3 via the rotating shaft assembly 5; and the locking lever assembly 4 includes a locking lever body 42, which is rotatably mounted in the angle adjustment block 3. The first connecting piece 1 is provided with a plurality of composite holes 122 around the rotating shaft assembly 5. The locking lever body 42 passes through the angle adjustment block 3 and locks with the composite holes 122, locking the first connecting piece 1 and the angle adjustment block 3 together, preventing the first connecting piece 1 from rotating and preventing the angle between the first connecting piece 1 and the second connecting piece 2 from changing. In other words, the display case 200 fixed to the second connecting piece 2 is stationary, while the display case 200 fixed to the first connecting piece 1 rotates around the rotating shaft assembly 5 until it reaches a preset angle, at which point it is locked by the locking lever body 42.

[0045] See Figure 2 and Figure 9 In some feasible solutions, the composite hole 122 includes a hemispherical segment and a threaded segment from front to back. The hemispherical segment is used to cooperate with the positioning bead 31 to achieve positioning. The rear end of the locking rod body 42 is provided with an external thread, and the threaded segment is used to lock with the rear end of the locking rod body 42. The locking rod body 42 can be threadedly connected to the threaded segment of any composite hole 122 to lock the first connecting piece 1. The rear side of the angle adjustment block 3 is provided with a mounting hole, and the positioning bead 31 is fixed in the mounting hole by a threaded fastener. The positioning bead 31 is placed in the hemispherical segment of any composite hole 122 that is not currently engaged with the locking rod body 42. The distance from the locking rod body 42 to the shaft assembly 5 is equal to the distance from the positioning bead 31 to the shaft assembly 5. The multiple composite holes 122 form a circle with the shaft assembly 5 as the center. The locking rod body 42 and the positioning bead 31 respectively cooperate with one of the composite holes 122.

[0046] In actual production applications, the coaxiality tolerance of the hemispherical segment and the threaded segment of the composite hole 122 is ≤0.05mm, and the composite hole 122 is evenly divided at 30°±0.1° with the rotating shaft assembly 5 as the center on the angle adjustment area 12. The depth of the threaded segment of the composite hole 122 is usually 3mm-5mm, and the thread specification usually adopts the M4 standard fine thread. The positioning ball 31 includes a steel column and a built-in compression spring, which is a prior art and will not be described in detail here. The steel ball protrudes from the surface of the angle adjustment member 3 at a height of 1.5mm, and the pre-pressure applied to the composite hole 122 is 2-5N to ensure clear rotation gears. The depth of the threaded segment of the composite hole 122 can be adjusted according to actual conditions.

[0047] It should be explained that the maximum adjustable range of the first connecting piece 1 is 180 degrees, and the minimum adjustable range is 0 degrees. The angle adjustment block 3 is engraved with a scale, and each 30 degrees corresponds to an adjustment gear. In this embodiment, since twelve compound holes 122 and two positioning beads 31 are provided, the angle corresponding to each rotation of the first connecting piece 1 is 30 degrees, that is, the difference between the two scales is 30 degrees. In actual application, the angle corresponding to each rotation of the first connecting piece 1 is adjusted according to the actual splicing requirements. An arrow mark is provided on the first connecting piece 1, pointing to the scale of the angle adjustment block 3, indicating the rotation angle of the first connecting piece 1. The first connecting piece 1 and the second connecting piece 2 are both provided with mounting holes and positioning through holes adapted to the display box 200.

[0048] See Figure 4 Furthermore, two positioning beads 31 are provided, and the two positioning beads 31 are symmetrically arranged about the shaft assembly 5 to provide temporary positioning during the angle adjustment process to ensure smooth rotation.

[0049] See Figure 2 and Figure 7 In actual production operations, a handle 41 is installed at the front end of the locking rod body 42. The locking rod body 42 is inserted into the handle 41 and fixedly connected together by a pin. By rotating the handle 41, the locking rod body 42 is driven to rotate, so that the locking rod body 42 is screwed into or out of the composite hole 122 to achieve locking or unlocking, which is more labor-saving and more convenient to operate.

[0050] See Figure 7 In some feasible solutions, the locking rod assembly 4 also includes a spring 43, which is sleeved on the locking rod body 42 and placed between the handle 41 and the angle adjustment block 3. The front end of the spring 43 abuts the rear wall of the handle 41, and the rear end of the spring 43 abuts the outer edge of the locking rod connecting hole 33 of the angle adjustment block 3.

[0051] See Figure 7 and Figure 8The locking rod body 42 includes a head 421, a neck 422 and a threaded rod 423 from front to back, and the diameter of the neck 422 is less than the diameter of the threaded rod 423 and less than the diameter of the head 421. The threaded rod 423 is provided with an external thread, and the threaded rod 423 is adapted to the threaded section of the middle hole 332 and the composite hole 122. The locking rod connecting hole 33 is divided into a front hole 331, a middle hole 332 and a rear hole 333 from front to back. The aperture of the front hole 331 is greater than the aperture of the rear hole 333 and is greater than the aperture of the middle hole 332. A thread adapted to the threaded rod 423 is provided in the middle hole 332. When the locking rod body 42 is assembled with the angle adjustment block 3, the threaded rod 423 is first threadedly engaged with the middle hole 332, and then unscrewed from the middle hole 332 and extends into the rear hole 333. At this time, if the locking rod body 42 continues to move backward, when the head 421 moves backward in a straight line until it abuts against the side wall of the front hole 331, the locking rod body 42 cannot continue to move backward, preventing the locking rod body 42 from moving backward excessively; if the locking rod body 42 moves forward, when the threaded rod portion 423 moves forward in a straight line until it abuts against the side wall of the rear hole 333, the locking rod body 42 cannot continue to move forward in a straight line, and only by rotating the locking rod body 42 in the opposite direction can the threaded rod portion 423 be unscrewed from the middle hole 332 and removed. Therefore, after unlocking, the locking rod body will not fall off the angle adjustment block 3.

[0052] The aperture of the rear hole 333 is greater than the aperture of the middle hole 332. Firstly, it reduces the weight of the connecting lock 100; secondly, it reduces the area of ​​the threaded connection between the angle adjustment block 3 and the threaded rod 423; thirdly, it prevents threaded interference between the threaded rod 423 and the angle adjustment block 3 during the process of the threaded rod 423 withdrawing from the composite hole 122, and when the threaded rod 423 withdraws into the rear hole 333, it is stuck on the side wall of the rear hole 333, thereby making the assembly of the lock rod body 42 and the unlocking operation more convenient and labor-saving, and providing a better operating experience.

[0053] participate Figure 2 and Figure 4 As a feasible solution, the first connecting piece 1 includes a box connection area 11 and an angle adjustment area 12. The box connection area 11 is rectangular as a whole and is used to connect with the display box 200. The angle adjustment area 12 is circular and is used to rotate with the angle adjustment block 3. A connecting through hole 121 is provided at the center of the angle adjustment area 12, and composite holes 122 are evenly provided around the connecting through hole 121; the angle adjustment block 3 is provided with a connecting through hole 34; the shaft assembly 5 includes an internal threaded column 51, a connecting piece 52 and a gasket 53. The internal threaded column 51 passes through the connecting through hole 34 and the connecting through hole 121 in sequence, the connecting piece 52 passes through the gasket 53 and is screwed into the internal threaded column 51, and the gasket 53 is pressed against the back of the angle adjustment area 12 through a threaded connection. Therefore, the first connecting piece 1 and the angle adjustment block 3 are rotatably connected together.

[0054] The overall shape of the second connecting piece 2 is a rectangle with a notch, and the notch is used to avoid the angle adjustment area 12.

[0055] In addition, the angle adjustment block 3 is further provided with a locking rod connecting hole 33 , and the locking rod body 42 passes through the locking rod connecting hole 33 and is threadedly engaged with the threaded section of the composite hole 122 .

[0056] See Figure 4 In order to reduce the difficulty of fixing the second connecting piece 2 and the angle adjustment block 3, the second connecting piece 2 is provided with a positioning hole 21, and the angle adjustment block 3 is correspondingly provided with a positioning column. The positioning column 32 is inserted into the positioning hole 21 to facilitate the second connecting piece 2 and the angle adjustment block 3 to be connected together by bolts.

[0057] The working principle of the connecting lock 100 is as follows:

[0058] 1. Unlock: First, rotate the handle 41 to drive the locking rod body 42 out of the threaded section of the composite hole 122. The positioning ball 31 remains stuck in the hemispherical section of the other composite hole 122, temporarily fixing the first connecting piece 1. At this time, the first connecting piece 1 and the angle block 3 are unlocked.

[0059] 2. Adjusting the splicing angle: The first connecting piece 1 rotates around the rotating shaft assembly 5, and the positioning bead 31 automatically snaps into the hemispherical section of the composite hole 122 to provide temporary positioning and stability.

[0060] 3. Locking and fixing: When the desired angle (such as 90°, 120°, etc.) is reached, rotate the handle 41 and screw the locking rod body 42 into the threaded section of another composite hole 122 to fix the first connecting piece 1 and the angle adjustment block 3 by thread locking.

[0061] The first connecting piece 1 is rotatably connected to the angle adjustment block 3 through the rotating shaft assembly 5 and is locked together by the locking rod assembly 4. The second connecting piece 2 is fixedly connected to the angle adjustment block 3. In other words, the first connecting piece 1 and the second connecting piece 2 are indirectly rotatably connected, and the rotation angle is locked by the locking rod assembly 4. Each component acts as an organic whole and cooperates with each other to complete the adjustment and locking of the splicing angle of the display box 200. None of them can be missing.

[0062] Example 2:

[0063] Reference Figure 10 This embodiment provides an LED display screen, including a display box 200 and the aforementioned connecting lock 100. The backs of two adjacent display boxes 200 are connected together through the connecting lock 100, and special-shaped screens can be spliced.

[0064] in, Figure 10From left to right, the first, second, third and fourth splicing usage methods of the connecting lock 100 are shown in sequence. These four splicing methods can be used in combination according to actual conditions to splice special-shaped screens. The first splicing method is to splice two adjacent display boxes 200 in the longitudinal direction together through the connecting lock 100, and the angle between the first connecting piece 1 and the second connecting piece 2 is 180 degrees; the second splicing method is to splice two diagonally located display boxes 200 together through the connecting lock 100, and the angle between the first connecting piece 1 and the second connecting piece 2 is 90 degrees; the third splicing method is to splice two adjacent display boxes 200 in the transverse direction together through the connecting lock 100, and the angle between the first connecting piece 1 and the second connecting piece 2 is 0 degrees; the fourth splicing method is to splice two display boxes 200 together through the connecting lock 100, and the angle between the first connecting piece 1 and the second connecting piece 2 can be 30 degrees, 60 degrees, 90 degrees, 120 degrees, 150 degrees and 180 degrees, which can be flexibly adjusted according to the installation site conditions and the scale of the angle adjustment block 3. It should be noted that, from the first and third splicing methods, it can be seen that the placement of one of the display boxes 200 can be changed to horizontal or vertical placement by connecting the lock 100, which helps to splice special-shaped screens with rectangular display boxes 200 by changing the placement method.

[0065] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0066] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0067] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0068] In the description of this specification, the terms "one embodiment", "some embodiments", "embodiments", "examples", "specific examples" or "some examples" refer to the specific features, structures, materials or characteristics described in conjunction with the embodiment or example and included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples, unless they are mutually inconsistent.

[0069] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A connecting lock with adjustable splicing angle, characterized by: Used to connect the backs of two display boxes (200), adjust and lock the splicing angle of the two display boxes (200), comprising a first connecting piece (1), a second connecting piece (2), an angle adjustment block (3), a rotating shaft assembly (5) and a locking rod assembly (4); The second connecting piece (2) is fixedly connected to the angle adjustment block (3); The first connecting piece (1) and the angle adjustment block (3) are rotatably connected together via a rotating shaft assembly (5); The locking rod assembly (4) includes a locking rod body (42), which is rotatably installed in the angle adjustment block (3), and the first connecting piece (1) is provided with a plurality of composite holes (122) around the rotating shaft assembly (5). The locking rod body (42) passes through the angle adjustment block (3) and is locked with the composite holes (122) to lock the first connecting piece (1) and the angle adjustment block (3) together.

2. A connecting lock with adjustable splicing angle according to claim 1, characterized in that: The composite hole (122) includes a hemispherical segment and a threaded segment in sequence from front to back, and the rear end of the locking rod body (42) is provided with an external thread. The locking rod body (42) is used to be threadedly connected to the threaded segment of any one of the composite holes (122) to lock the first connecting piece (1); A positioning bead (31) is fixedly mounted on the rear side of the angle adjustment block (3), and the positioning bead (31) is placed in a hemispherical segment in any composite hole (122) that is not currently engaged with the locking rod body (42), and the distance from the locking rod body (42) to the rotating shaft assembly (5) is equal to the distance from the positioning bead (31) to the rotating shaft assembly (5).

3. The connecting lock with adjustable splicing angle according to claim 2, characterized in that: There are two positioning beads (31), and the two positioning beads (31) are symmetrically arranged about the rotating shaft assembly (5).

4. The connecting lock with adjustable splicing angle according to claim 2, characterized in that: A handle (41) is installed at the front end of the locking rod body (42), and the locking rod body (42) is inserted into the handle (41) and fixedly connected together by a latch.

5. The connecting lock with adjustable splicing angle according to claim 4, characterized in that: The locking rod assembly (4) further comprises a spring (43), wherein the spring (43) is sleeved on the locking rod body (42) and is placed between the handle (41) and the angle adjustment block (3).

6. The connecting lock with adjustable splicing angle according to claim 1, characterized in that: The first connecting piece (1) comprises a box connecting area (11) and an angle adjustment area (12), wherein the box connecting area (11) is used to connect to the display box (200), and the angle adjustment area (12) is circular, with a connecting through hole (121) provided at the center thereof, and the composite holes (122) are evenly provided around the connecting through hole (121); The angle adjustment block (3) is provided with a connecting through hole (34); The rotating shaft assembly (5) comprises an internal threaded column (51), a connecting piece (52) and a gasket (53); the internal threaded column (51) passes through the connecting hole (34) and the connecting through hole (121) in sequence; the connecting piece (52) is threadedly connected to the internal threaded column (51); and the gasket (53) is placed between the connecting piece (52) and the back side of the angle adjustment area (12).

7. The connecting lock with adjustable splicing angle according to claim 1, characterized in that: The second connecting piece (2) is provided with a positioning hole (21); The angle adjustment block (3) is provided with a positioning column, the positioning column (32) is inserted into the positioning hole (21), and the second connecting piece (2) and the angle adjustment block (3) are connected together by bolts.

8. An LED display screen, characterized in that: It comprises a display box (200) and a connecting lock (100) according to any one of claims 1 to 7, wherein the back surfaces of two adjacent display boxes (200) are connected together via the connecting lock (100).

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