Connecting lock, display screen frame and LED display screen

Abstract

The embodiment of the utility model discloses a connecting lock, a display screen frame and an LED display screen, a first fixed seat of the connecting lock is provided with a lock rod in a penetrating manner, one end of the lock rod is connected with a handle, the other end of the lock rod is provided with a lock pin, one surface, deviating from the handle, of the first fixed seat is provided with a positioning boss, and a second fixed seat is provided with an outer wall surface and an inner wall surface which are opposite to each other; the outer wall face is provided with a positioning groove capable of containing the positioning boss, the handle is rotated to drive the lock pin to rotate to a first angle to be aligned with the lock hole, and the lock rod is continuously pushed in the direction close to the second fixing base to drive the lock pin to penetrate through the lock hole; and then the handle is rotated again to drive the lock pin to rotate to a second angle to be staggered with the lock hole, so that the first fixed seat and the second fixed seat are locked and connected. According to the connecting lock disclosed by the embodiment of the utility model, the two display screens can be quickly and accurately aligned when spliced, the whole operation process is convenient and quick, and the splicing efficiency of the display screens can be greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of LED display technology, and in particular to a connecting lock, a display frame, and an LED display. Background Technology

[0002] When LED displays are used in large-scale events or stage performances, multiple LED displays are usually spliced ​​together to form a large screen for audience enjoyment and enhanced visual experience. Currently, splicing LED displays generally requires the use of a connecting lock. A connecting lock typically includes a mounting base, a locking rod, and a handle, with the locking rod passing through the mounting base. When splicing two displays, the locking rod is passed through a horizontal keyhole, then rotated to misalign it with the keyhole; then, one hand holds the locking rod while the other rotates the handle, bringing it closer to the mounting base until it abuts against it, locking the rod in place. While this method allows splicing two displays, it is cumbersome and lacks proper positioning during connection, easily leading to misalignment and requiring repeated attempts, thus affecting the splicing efficiency. Utility Model Content

[0003] In view of the above problems, embodiments of the present invention are proposed to provide a connection lock, a display frame, and an LED display screen that solve or at least partially solve the above problems.

[0004] In a first aspect, embodiments of the present invention provide a connection lock, comprising:

[0005] A first fixed base is provided with a locking rod, one end of which is connected to a handle and the other end of which is provided with a locking pin. The first fixed base has a positioning boss on the side opposite to the handle.

[0006] The second fixing seat has an outer wall surface and an inner wall surface that are opposite to each other, and a locking hole that passes through the outer wall surface and the inner wall surface. The outer wall surface is provided with a positioning groove that can accommodate the positioning boss.

[0007] Rotating the handle causes the locking pin to rotate to a first angle and align with the lock hole. Continuing to push the locking rod closer to the second fixed seat causes the locking pin to pass through the lock hole. Then, rotating the handle again causes the locking pin to rotate to a second angle and misalign with the lock hole, thereby achieving a locking connection between the first fixed seat and the second fixed seat.

[0008] Furthermore, the first fixed base has two positioning bosses at a diagonal position on the side opposite to the handle; the outer wall surface has two positioning grooves at positions corresponding to the two positioning bosses.

[0009] Furthermore, the positioning boss is provided with a bead, and the bottom of the positioning groove is provided with a bead groove that can accommodate the bead.

[0010] Furthermore, the locking pin is vertically disposed at the end of the locking rod away from the handle, and a guide portion is provided on the side of the locking pin opposite to the handle;

[0011] The lock hole is an elongated hole through which the locking pin can pass when it is rotated to the first angle.

[0012] Furthermore, the second fixing seat includes an arc-shaped locking tongue and an arc-shaped housing, wherein the arc-shaped locking tongue can slide back and forth within the arc-shaped housing;

[0013] The front end of the arc-shaped locking tongue is provided with a receiving groove that can accommodate the locking pin, and the groove walls facing the first fixing seat are the outer wall surface and the inner wall surface, respectively.

[0014] Furthermore, the second fixing seat also includes an angle lock;

[0015] The arc-shaped housing has a hollowed-out groove, through which the angle lock can pass to connect with the arc-shaped latch to lock the relative sliding between the arc-shaped latch and the arc-shaped housing.

[0016] Furthermore, the second fixed base also includes a sliding shaft;

[0017] A groove is provided along the arc length of the arc-shaped locking tongue, and the sliding shaft passes through the groove and is fixedly connected to the arc-shaped housing on both sides.

[0018] Furthermore, a rotating cylinder is provided inside the first fixed base, and the rotating cylinder is slidably connected to the first fixed base. A spring is provided inside the rotating cylinder, and the locking rod passes through the spring. One end of the spring abuts against the first fixed base, and the other end of the spring abuts against the locking rod. When the handle is rotated to drive the locking pin to rotate to the second angle, the spring can cause the locking pin to move towards the first fixed base and abut against the inner wall surface.

[0019] Furthermore, a rotary lock is provided on the handle, the rotary lock including a torsion spring, a rotary rod and a pressing part;

[0020] The outer wall of the rotating drum is provided with a locking groove. Under the action of the torsion spring, the rotating rod can be inserted into the locking groove to lock the rotating drum. Pressing the pressing part can drive the rotating rod to rotate and disengage from the locking groove to release the lock on the rotating drum.

[0021] Secondly, this utility model embodiment also provides a display screen frame, which includes a frame body and a connecting lock as described in any of the first aspects above, wherein the connecting lock is fixedly connected to the frame body.

[0022] Thirdly, this utility model embodiment also provides a display screen frame, which includes a frame body, an LED panel and a connecting lock as described in any of the first aspects above. The connecting lock is fixedly connected to the frame body, and the LED panel is connected to the side of the frame body opposite to the connecting lock.

[0023] In the technical solution provided by this utility model embodiment, a locking rod is provided through the first fixing seat of the connecting lock. One end of the locking rod is connected to a handle, and the other end of the locking rod is provided with a locking pin. The second fixing seat has an outer wall surface and an inner wall surface with opposite sides, and a lock hole penetrating the outer wall surface and the inner wall surface. Rotating the handle can drive the locking pin to rotate to a first angle and align with the lock hole. Continuing to push the locking rod closer to the second fixing seat can drive the locking pin to pass through the lock hole. Then, rotating the handle again can drive the locking pin to rotate to a second angle and misalign with the lock hole, so as to realize the locking connection between the first fixing seat and the second fixing seat. The entire operation process only requires rotating the handle, which is simple and quick. Furthermore, a positioning boss is provided on the side of the first fixing seat away from the handle, and a positioning groove is provided on the outer wall surface to accommodate the positioning boss, making it easy to align when used for display screen splicing, thereby improving the splicing efficiency of the display screen. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A three-dimensional structural schematic diagram of an LED display screen provided for an embodiment of this utility model;

[0026] Figure 2 A three-dimensional structural docking diagram of a connecting lock provided for an embodiment of this utility model;

[0027] Figure 3 An exploded three-dimensional structural diagram of a second lock seat for a connecting lock, provided for an embodiment of this utility model;

[0028] Figure 4 An exploded three-dimensional structural diagram of a first lock seat of a connecting lock provided for an embodiment of this utility model;

[0029] Figure 5 This is a three-dimensional structural diagram of a connecting lock provided for an embodiment of the present utility model. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the embodiments of this utility model.

[0031] It should be noted that in the description of this utility model, if the terms "first" or "second" appear, they are only used for the convenience of describing different components or names, and should not be construed as indicating or implying a sequential relationship, relative importance, or implicitly specifying the number of technical features indicated. Therefore, a feature specified with "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, if "and / or" appears throughout the text, it means that it includes three parallel solutions; taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0033] Please refer to Figure 1 This is a three-dimensional structural diagram of an LED display screen provided by an embodiment of the present utility model. The LED display screen 4 includes a frame body 1, an LED panel 2, and a connecting lock 3. The connecting lock 3 is fixedly connected to the frame body 1 to form a display screen frame for supporting the LED panel 2. The LED panel 2 is connected to the side of the frame body 1 opposite to the connecting lock 3. The connecting lock 3 is used to connect two display screen frames, or it can be understood as being used to connect two LED display screens 4. For the specific structure of the connecting lock and the beneficial technical effects it can achieve, please refer to the following embodiment.

[0034] Please combine Figure 2-5The connecting lock 3 includes a first fixing seat 10 and a second fixing seat 20. A locking rod 110 passes through the first fixing seat 10. One end of the locking rod 110 is connected to a handle 120, and the other end of the locking rod 110 is provided with a locking pin 130. A positioning boss 101 is provided on the side of the first fixing seat 10 facing away from the handle 120. The second fixing seat 20 has opposing outer wall surfaces 210 and inner wall surfaces 220, and a locking hole 230 penetrating the outer wall surface 210 and the inner wall surface 220. The outer wall surface 210... A positioning groove 201 is provided to accommodate the positioning boss 101; rotating the handle 120 can drive the locking pin 130 to rotate to a first angle and align with the lock hole 230; continuing to push the locking rod 110 towards the second fixing seat 20 can drive the locking pin 130 to pass through the lock hole 230; then rotating the handle 120 again can drive the locking pin 130 to rotate to a second angle and misalign with the lock hole 230, so as to achieve a locking connection between the first fixing seat 10 and the second fixing seat 20.

[0035] Specifically, the first fixing seat 10 and the second fixing seat 20 are both fixedly connected to the opposite sides of the frame body 1 using screws. That is, the first fixing seat 10 and the second fixing seat 20 are respectively fixedly connected to the opposite sides of the frame body 1. When the two frame bodies 1 are connected together, the first fixing seat 10 and the second fixing seat 20 are opposite to each other. One end of the locking rod 110 is provided with the handle 120, and the other end of the locking rod 110 passes through the first fixing seat 10 and extends to the second fixing seat 20. The locking pin 130 is also provided at the end of the locking rod 110 away from the handle 120. The front end of the second fixing seat 20 has the opposite outer wall surface 210 and the inner wall surface 220. The lock hole 230 passes through the outer wall surface 210 and the inner wall surface 220, allowing the locking pin 130 and the locking rod 110 to pass through.

[0036] In use, rotating the handle 120 causes the locking rod 110 to rotate, which in turn causes the locking pin 130 to rotate. When it rotates to the first angle, the locking pin 130 is just aligned with the lock hole 230. Continuing to push the locking rod 110 closer to the second fixing seat 20 causes the locking pin 130 to pass through the lock hole 230. That is, at this time, the locking pin 130 is located on one side of the inner wall surface 220. At this time, continuing to rotate the locking rod 110 and causing the locking pin 130 to rotate to the second angle causes the locking pin 130 to be misaligned with the lock hole 230. The locking pin 130 and the locking rod 110 can no longer come out of the lock hole 230, thereby achieving the locking connection between the first fixing seat 10 and the second fixing seat 20. To release the lock between the first fixing seat 10 and the second fixing seat 20, simply turn the handle 120 in the opposite direction, causing the locking pin 130 to rotate back to the first angle. The locking pin 130 will then align with the lock hole 230 again. Pulling the locking rod 110 away from the second fixing seat 20 will then disengage the locking pin 130 from the lock hole 230. The entire locking and unlocking process is simple and convenient, effectively improving the splicing efficiency of the display screen.

[0037] In addition, a positioning boss 101 is provided on the side of the first fixing base 10 opposite to the handle 120, and a positioning groove 201 is provided on the outer wall surface 210 to accommodate the positioning boss 101. When the two display screen frames are docked, the positioning boss 101 can quickly sink into the positioning groove 201, so that the two display screen frames can be quickly aligned when docking, further improving the splicing efficiency of the display screen. At the same time, the design of the positioning boss 101 facilitates quick positioning and, due to its large contact area, helps to prevent damage to the display screen.

[0038] Furthermore, in other preferred embodiments of this utility model, the first fixing seat 10 is provided with two positioning bosses 101 at a diagonal position on the side opposite to the handle 120; the outer wall surface 210 is provided with two positioning grooves 201 at positions corresponding to the two positioning bosses 101.

[0039] Specifically, the positioning protrusions 101 and positioning grooves 201 on the first fixing base 10 and the outer wall surface 210 are arranged in pairs, and their positions are corresponding, that is, they are located at the diagonal positions on the side of the first fixing base 10 away from the handle 120 and the diagonal positions on the side of the outer wall surface 210 facing the first fixing base 10, respectively. This diagonal arrangement of the positioning protrusions 101 and positioning grooves 201 has a foolproof function to ensure that the first fixing base 10 and the second fixing base 20 can be completely aligned when the two display screen frames are spliced.

[0040] Furthermore, in other preferred embodiments of the present invention, the positioning boss 101 is provided with a ball 1011, and the bottom of the positioning groove 201 is provided with a ball groove 2011 capable of accommodating the ball 1011.

[0041] Specifically, the ball 1011 protrudes from the positioning boss 101 and is disposed on the side of the positioning boss 101 facing the positioning groove 201, while the ball groove 2011 is disposed at the bottom of the positioning groove 201 opposite to the ball 1011. This design can guide the rapid positioning of the positioning boss 101 and the positioning groove 201, thereby improving the reliability of the rapid positioning connection between the first fixing seat 10 and the second fixing seat 20.

[0042] Furthermore, in other preferred embodiments of the present invention, the locking pin 130 is vertically disposed at the end of the locking rod 110 away from the handle 120, and a guide portion 1301 is provided on the side of the locking pin 130 facing away from the handle 120;

[0043] The lock hole 230 is an elongated hole through which the locking pin 130 can pass when it is rotated to the first angle.

[0044] Specifically, the locking pin 130 is vertically connected to the end of the locking rod 110 away from the handle 120, making the end of the locking rod 110 away from the handle 120 T-shaped. Guide portions 1301 are provided at both ends of the locking pin 130 on the side facing away from the handle 120. The elongated hole 230 has a length dimension slightly larger than the length of the locking pin 130 to ensure that the locking pin 130 can pass through the locking hole 230 when rotated to the first angle. The width of the elongated hole is larger than the diameter of the locking rod 110 to ensure that the ends of the locking pin 130 and the locking rod 110 can be inserted into the locking hole 230. Here, by providing the guide portion 1301 at the end of the locking pin 130, it helps the ends of the locking pin 130 and the locking rod 110 to be quickly inserted into the locking hole 230, thereby quickly forming a lock.

[0045] Furthermore, in other preferred embodiments of the present invention, the second fixing base 20 includes an arc-shaped locking tongue 240 and an arc-shaped housing 250, wherein the arc-shaped locking tongue 240 is capable of reciprocating within the arc-shaped housing 250;

[0046] The front end of the arc-shaped locking tongue 240 is provided with a receiving groove 260 that can accommodate the locking pin 130. The groove walls of the receiving groove 260 facing the first fixing seat 10 are the outer wall surface 210 and the inner wall surface 220, respectively.

[0047] Specifically, the arc-shaped housing 250 has an arc-shaped receiving space, and the arc-shaped locking tongue 240 is accommodated in the receiving space. The receiving groove 260 is provided at the front end of the arc-shaped locking tongue 240. The locking hole 230 is located on the outer groove wall of the receiving groove 260, which faces the groove wall of the first fixing seat 10. That is, the groove walls of the receiving groove 260 facing the first fixing seat 10 are the outer wall surface 210 and the inner wall surface 220, respectively. The receiving groove 260 is used to accommodate the ends of the locking pin 130 and the locking rod 110 when the first fixing seat 10 and the second fixing seat 20 are connected. The arc-shaped locking tongue 240 can slide back and forth in the receiving space to change its length and angle extending out of the arc-shaped housing 250, thereby adjusting the connection angle between the first fixing seat 10 and the second fixing seat 20, such as satisfying the connection between the arc-shaped display frame.

[0048] Furthermore, in other preferred embodiments of the present invention, the second fixing base 20 further includes an angle lock 270;

[0049] The arc-shaped housing 250 is provided with a hollowed-out groove 2501, and the angle lock 270 can pass through the hollowed-out groove 2501 to connect with the arc-shaped locking tongue 240 to lock the relative sliding between the arc-shaped locking tongue 240 and the arc-shaped housing 250.

[0050] Specifically, the angle lock 270 includes, but is not limited to, a horn bolt lock. The arcuate housing 250 has a hollowed-out groove 2501 along its arcuate length direction. The front end of the angle lock 270 passes through the hollowed-out groove 2501 and connects to the arcuate locking tongue 240. By tightening the angle lock 270, the arcuate housing 250 and the arcuate locking tongue 240 are pressed together to prevent the arcuate locking tongue 240 and the arcuate housing 250 from continuing to slide relative to each other. This serves to lock the length and angle of the arcuate locking tongue 240 extending out of the arcuate housing 250, that is, to lock the connection angle between the first fixing seat 10 and the second fixing seat 20.

[0051] In addition, the second fixed base 20 also includes a sliding shaft 280; a groove 2401 is provided along the arc length direction of the arc-shaped locking tongue 240, and the sliding shaft 280 passes through the groove 2401 and is fixedly connected to the arc-shaped housing 250 on both sides.

[0052] In other preferred embodiments of this utility model, the slide groove 2401 is also provided along the arc length direction of the arc-shaped housing 250, and the sliding shaft 280 is also provided at the corresponding position of the arc-shaped locking tongue 240. The two ends of the sliding shaft 280 can reciprocate in the slide groove 2401.

[0053] Specifically, a groove 2401 is provided along the arc length direction of the arc-shaped latch 240 and / or along the arc length direction of the arc-shaped housing 250. A sliding shaft 280 is respectively inserted into the two grooves 2401. The sliding shaft 280 can slide back and forth in the grooves 2401, thereby forming a track on the arc-shaped latch 240 and / or the arc-shaped housing 250 for the arc-shaped latch 240 to slide back and forth, so as to ensure the smoothness of the arc-shaped latch 240 in sliding back and forth within the accommodating space of the arc-shaped housing 250.

[0054] Furthermore, in other preferred embodiments of this utility model, a plurality of grooves 2402 are provided along the arc length direction of the arc-shaped locking tongue 240, and screw beads 290 are provided on both sides of the arc-shaped housing 250.

[0055] Specifically, the plurality of grooves 2402 are equally spaced along the arc length of the arc-shaped latch 240, and the plurality of grooves 2402 are provided on both sides of the arc-shaped latch 240. The screw ball 290 is provided on both sides of the arc-shaped housing 250. The front end of the screw ball 290 can be accommodated in the groove 2402, so that timely feedback can be provided from hearing and touch when the arc-shaped latch 240 slides back and forth in the arc-shaped housing 250.

[0056] In another preferred embodiment of this utility model, a rotating cylinder 140 is provided inside the first fixed base 10, and the locking rod 110 is inserted into the rotating cylinder 140, with the locking rod 110 and the rotating cylinder 140 being threadedly connected. The outer wall of the rotating cylinder 140 is provided with a sliding groove in the axial direction, and a guide post is provided on the first fixed base 10. The guide post extends into the sliding groove and can slide within the groove, thereby achieving a sliding connection between the rotating cylinder 140 and the first fixed base 10. A spring (not shown in the figure) is provided inside the rotating cylinder 140. The locking rod 110 passes through the spring. One end of the spring abuts against the first fixed seat 10, and the other end of the spring abuts against the locking rod 110. Here, the locking rod 110 is provided with a threaded protrusion, and the inner wall of the rotating cylinder 140 is provided with a threaded groove. One end of the spring abuts against the inner wall of the first fixed seat 10, and the other end of the spring abuts against the threaded protrusion. When the handle 120 is rotated to drive the locking pin 130 to rotate to the second angle, under the action of the spring force, the locking pin 130 can follow the locking rod 110 to move away from the lock hole 230, so that the locking pin 130 moves towards the first fixed seat 10 and abuts against the inner wall surface 220.

[0057] Specifically, the rotating cylinder 140 is disposed within the housing of the first fixed base 10. The rotating cylinder 140 is slidably connected to the first fixed base 10 so that the rotating cylinder 140 can rotate relative to the first fixed base 10. A spring is also disposed within the rotating cylinder 140, and the locking rod 110 passes through the spring. The two ends of the spring are respectively connected to the end of the rotating cylinder 140 near the handle 120 and the end of the locking rod 110 near the locking pin 130. By rotating the handle 120, the locking rod 110 is rotated, thereby causing the locking pin 130 to rotate to the first angle. The locking pin 130 is aligned with the lock hole 230. A forceful push moves the locking rod 110 closer to the second fixed seat 20, causing the locking pin 130 to pass through the lock hole 230. Then, the handle 120 is rotated further, causing the locking rod 110 and the locking pin 130 to rotate to the second angle. The pushing force on the locking rod 110 is then released, and the locking rod 110 moves away from the second fixed seat 20 under the tension of the spring, causing the locking pin 130 to abut against the inner wall surface 220, thus completing the locking connection between the first fixed seat 10 and the second fixed seat 20. Here, the spring provides a rebound force for the movement of the locking rod 110, allowing the locking pin 130 to quickly abut against the inner wall surface 220, improving the ease of locking.

[0058] Furthermore, a rotary lock 150 is provided on the handle 120, the rotary lock 150 including a torsion spring 1501, a rotating rod 1502 and a pressing part 1503;

[0059] The outer wall of the rotating drum 140 is provided with a locking groove 1401. Under the action of the torsion spring 1501, the rotating rod 1502 can be inserted into the locking groove 1401 to lock the rotating drum 140. Pressing the pressing part 1503 can drive the rotating rod 1502 to rotate and disengage from the locking groove 1401 to release the lock on the rotating drum 140.

[0060] Here, the rotary lock 150 is mounted on the handle 120 and can rotate with the handle 120. A locking groove 1401 is provided on the outer wall of the rotary cylinder 140. After the rotary lock 150 rotates with the handle 120 to a certain angle, the rotating rod 1502 can be inserted into the locking groove 1401 to prevent further rotation. Specifically, when rotating the handle 120, pressing the pressing part 1503 can drive the rotating rod 1502 to rotate and disengage from the locking groove 1401 to release the lock on the rotary cylinder 140, allowing the handle 120 to continue rotating. After rotating to a preset angle, the force of pressing the pressing part 1503 is removed, and under the action of the torsion spring 1501, the rotating rod 1502 rotates and can sink into the locking groove 1401 to lock the rotary cylinder 140. This design avoids accidental activation that could cause the locking rod 110 and the locking pin 130 to rotate ineffectively, thereby effectively improving the reliability of the locking connection between the first fixed seat 10 and the second fixed seat 20.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, and not to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A connection lock, characterized in that, include: A first fixed base is provided with a locking rod, one end of which is connected to a handle and the other end of which is provided with a locking pin. The first fixed base has a positioning boss on the side opposite to the handle. The second fixing seat has an outer wall surface and an inner wall surface that are opposite to each other, and a locking hole that passes through the outer wall surface and the inner wall surface. The outer wall surface is provided with a positioning groove that can accommodate the positioning boss. Rotating the handle causes the locking pin to rotate to a first angle and align with the lock hole. Continuing to push the locking rod closer to the second fixed seat causes the locking pin to pass through the lock hole. Then, rotating the handle again causes the locking pin to rotate to a second angle and misalign with the lock hole, thereby achieving a locking connection between the first fixed seat and the second fixed seat.

2. The connection lock according to claim 1, characterized in that, The first fixed base has two positioning bosses at a diagonal position on the side opposite to the handle; the outer wall surface has two positioning grooves at positions corresponding to the two positioning bosses.

3. The connection lock according to claim 1, characterized in that, The positioning boss is provided with a bead, and the bottom of the positioning groove is provided with a bead groove that can accommodate the bead.

4. The connection lock according to claim 1, characterized in that, The locking pin is vertically disposed at the end of the locking rod away from the handle, and a guide portion is provided on the side of the locking pin opposite to the handle; The lock hole is an elongated hole through which the locking pin can pass when it is rotated to the first angle.

5. The connection lock according to any one of claims 1-4, characterized in that, The second fixing seat includes an arc-shaped locking tongue and an arc-shaped housing, wherein the arc-shaped locking tongue can slide back and forth within the arc-shaped housing; The front end of the arc-shaped locking tongue is provided with a receiving groove that can accommodate the locking pin, and the groove walls facing the first fixing seat are the outer wall surface and the inner wall surface, respectively.

6. The connection lock according to claim 5, characterized in that, The second fixing base also includes an angle lock; The arc-shaped housing has a hollowed-out groove, through which the angle lock can pass to connect with the arc-shaped latch to lock the relative sliding between the arc-shaped latch and the arc-shaped housing.

7. The connection lock according to any one of claims 1-4, characterized in that, The first fixed base is provided with a rotating cylinder, which is slidably connected to the first fixed base. The rotating cylinder is provided with a spring, and the locking rod passes through the spring. One end of the spring abuts against the first fixed base, and the other end of the spring abuts against the locking rod. When the handle is turned, causing the locking pin to rotate to the second angle, the spring enables the locking pin to move toward the first fixed seat and press against the inner wall surface.

8. The connection lock according to claim 7, characterized in that, A rotary lock is provided on the handle, and the rotary lock includes a torsion spring, a rotating rod, and a pressing part; The outer wall of the rotating drum is provided with a locking groove. Under the action of the torsion spring, the rotating rod can be inserted into the locking groove to lock the rotating drum. Pressing the pressing part can drive the rotating rod to rotate and disengage from the locking groove to release the lock on the rotating drum.

9. A display screen frame, characterized in that, It includes a frame body and a connecting lock as described in any one of claims 1-8, wherein the connecting lock is fixedly connected to the frame body.

10. An LED display screen, characterized in that, Includes a frame body, an LED panel, and a connecting lock as described in any one of claims 1-8. The connecting lock is fixedly connected to the frame body, and the LED panel is connected to the side of the frame body opposite to the connecting lock.

Images