Interlocking lock device and display screen

Abstract

The utility model discloses an embodiment provides a kind of linkage lock device, including up-down linkage lock and left-right linkage lock, wherein up-down linkage lock includes the lock bolt group and first lock groove piece of locking each other or unlocking, two corner frames on one side along up-down direction are equipped with lock bolt group, and two corner frames on the other side are equipped with first lock groove piece with lock bolt group one-to-one and can be moved simultaneously and with rotating. To realize the locking or unlocking of all lock bolt group and corresponding first lock groove piece. Left-right linkage lock includes the second lock head and second lock groove piece of locking each other or unlocking, two corner frames on one side along left-right direction are equipped with the second lock head that can be moved simultaneously, and two corner frames on the other side are equipped with second lock groove piece with second lock head one-to-one and can be rotated simultaneously. To realize the locking or unlocking of all second lock head and corresponding second lock groove piece, need not be operated separately, so the locking or unlocking operation between the adjacent two display screens is efficient and convenient.

Description

Technical Field

[0001] This utility model relates to the field of display equipment technology, and in particular to a linkage lock device and a display screen. Background Technology

[0002] Large display screens are typically composed of multiple smaller displays pieced together sequentially. Two adjacent displays, either vertically or horizontally, are locked together using interlocking locks to ensure that no individual display detaches after the screen is assembled and to guarantee the strength of the connection between adjacent displays. However, to ensure that adjacent displays do not shift relative to their connection points after locking, typically at least two interlocking locks are installed on adjacent edges to restrict the displacement of individual displays and ensure the stability of the entire large display screen connection.

[0003] Currently, the connection locks are typically independent, requiring individual operation of each lock during display installation or removal. This means that installing a single display requires not only individual operation of multiple locks on the left and right sides, but also multiple locks on the top and bottom sides. Repeated locking and unlocking actions make the process cumbersome, time-consuming, and inefficient. Furthermore, too many independent steps increase the risk of errors; overlooking a lock could affect the stability of the display connection or make disassembly difficult. Therefore, the existing display connection lock structure no longer meets the demands for convenience and efficiency in practical applications. Utility Model Content

[0004] In view of the above problems, this utility model embodiment is proposed. The purpose of this utility model embodiment is to provide a linkage lock device that can simultaneously lock or unlock all locks on the same side of the display screen.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A linkage locking device, wherein corner frames are provided at each corner of the circumferential direction on the side of the display screen away from the screen body, the linkage locking device comprising:

[0007] The vertical linkage lock includes bolt assemblies that lock or unlock each other and a first locking groove. At least one bolt assembly is provided on each of the two corner frames on one side along the vertical direction, and the first locking groove is provided on the two corner frames on the other side, corresponding one-to-one with the bolt assemblies and capable of moving and rotating simultaneously.

[0008] The left-right linkage lock includes a second lock head and a second lock groove that lock or unlock each other. At least one movable second lock head is provided on each of the two corner frames on one side along the left-right direction, and the second lock groove is provided on the two corner frames on the other side, which corresponds to the second lock head and can rotate simultaneously.

[0009] Optionally, the left and right linkage lock further includes:

[0010] A linkage assembly, angle-adjustable, is located between two adjacent corner frames, having at least a first angle and a second angle, and both ends of the linkage assembly are provided with the second lock head;

[0011] The second lock head has a connecting end at one end and a locking end at the other end. The connecting end can move through the corner frame and connect to the linkage group. The locking end has a third position that is retracted into the corner frame and a fourth position that is extended out of the corner frame.

[0012] When the linkage is at the first angle, the locking end is located at the third position;

[0013] When the linkage is at the second angle, the locking end is located at the fourth position.

[0014] Optionally, the linkage assembly includes:

[0015] Two connecting rods and a connector located between the two connecting rods;

[0016] The two ends of the two connecting rods, which are close to each other, are coaxially and rotatably mounted on the connecting member;

[0017] The two ends of the two connecting rods that are far apart are slidably mounted on the corner frame at the corresponding ends;

[0018] The connecting end is rotatably and slidably mounted on the connecting rod;

[0019] The connector can slide along the left and right sides of the display screen.

[0020] Optionally, the connecting rod is provided with a sliding groove extending along the length of the connecting rod;

[0021] The connecting end is provided with a protruding pin facing the connecting rod, and the protruding pin is slidably and rotatably disposed in the sliding groove.

[0022] Optionally, the left and right linkage lock further includes:

[0023] The second operating lever has two ends that are rotatably mounted in the corner frame on the corresponding side, and both are provided with the second locking groove.

[0024] Optionally, the upper and lower linkage lock further includes:

[0025] The first operating lever has sliding grooves on the two opposite sides of the two corner frames. Both ends of the first operating lever can slide and rotate in the corresponding sliding grooves, and both ends of the first operating lever are provided with the first locking groove. The corner frame is provided with a through hole that matches the bolt assembly.

[0026] Optionally, the bolt assembly includes:

[0027] The first lock head has a limiting end at one end and a through end at the other. The through end is movable through the corner frame. The limiting end has a first position retracted into the corner frame and a second position extended out of the corner frame.

[0028] The telescopic handle has a boss at one end that protrudes toward the corner frame, the boss abuts against the corner frame, and the through end is connected to the end of the telescopic handle located at the boss.

[0029] Optionally, the limiting end includes a sliding part and a limiting part, wherein the diameter of the limiting part is larger than the diameter of the sliding part;

[0030] The first locking groove has a through hole, and the end of the first operating rod is sleeved on the end of the through hole;

[0031] One side of the through hole is provided with a receiving hole, a sliding hole and a limiting hole connected in sequence;

[0032] The sliding hole extends along the axial direction of the first operating rod, and the receiving hole and the limiting hole are respectively provided at both ends of the sliding end;

[0033] The diameter of the receiving hole is larger than the diameter of the limiting part;

[0034] The width of the sliding hole and the diameter of the limiting hole are both smaller than the diameter of the limiting part but larger than the diameter of the sliding part.

[0035] Optionally, the axis of the portion of the through hole located at the limiting hole has a gap with the axis of the first operating lever.

[0036] Another objective of this utility model is to provide a display screen that can be locked or unlocked efficiently and conveniently with adjacent display screens.

[0037] To achieve this objective, the present invention adopts the following technical solution:

[0038] A display screen, comprising:

[0039] Screen body;

[0040] Corner frames, wherein corner frames are provided at each corner of the circumferential direction of the back of the screen; and

[0041] The linkage lock device installed on the corner frame is the linkage lock device described above.

[0042] The technical solution provided by this utility model embodiment includes a linkage locking device. This device comprises vertical linkage locks located on the top and bottom sides of the display screen and horizontal linkage locks located on the left and right sides of the display screen. The vertical linkage locks include first locking slots that can move and rotate simultaneously, allowing multiple first locking slots and corresponding bolt groups to lock or unlock simultaneously without requiring individual operation of the first locking slots and bolt groups. Similarly, the horizontal linkage locks include multiple second lock heads that can move simultaneously and corresponding second locking slots that can rotate simultaneously, allowing multiple second lock heads and corresponding second locking slots to lock or unlock simultaneously without requiring individual operation of the second locking slots and second lock heads. Therefore, it enables simultaneous locking or unlocking of all locks on the same side of the display screen, making locking or unlocking operations between adjacent display screens efficient and convenient. Attached Figure Description

[0043] 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.

[0044] Figure 1 This is a schematic diagram of the structure of the back of the display screen according to an embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of the structure of the second lock head and a partial connecting rod provided in an embodiment of the present invention;

[0046] Figure 3 This is a schematic diagram of the structure of the second operating lever and the second locking groove provided in an embodiment of the present utility model;

[0047] Figure 4 This is a schematic diagram of the structure of a bolt assembly provided in an embodiment of the present invention;

[0048] Figure 5 A schematic diagram of the structure of the first operating lever and the first locking groove is provided for one embodiment of the present utility model.

[0049] In the picture:

[0050] 100. Interlocking device; 200. Corner frame; 300. Screen body;

[0051] 1. Upper and lower linkage lock; 11. First lock groove; 111. Through hole; 112. Accommodating hole; 113. Sliding hole; 114. Limiting hole; 12. Lock bolt assembly; 121. Telescopic handle; 1211. Boss; 122. First lock head; 1221. Limiting end; 1201. Sliding part; 1202. Limiting part; 1222. Through end; 13. First operating lever;

[0052] 2. Left and right linkage lock; 21. Second lock groove; 211. Through hole; 212. Lock hole; 2121. First hole; 2122. Second hole; 22. Second lock head; 221. Connecting end; 222. Locking end; 2221. Limiting head; 2222. Moving section; 23. Linkage group; 231. Linkage; 2311. Sliding groove; 232. Connecting piece; 24. Second operating lever; 241. Rod body; 242. Operating handle;

[0053] 201. Frame; 202. Reinforcing beam. Detailed Implementation

[0054] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0055] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0056] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0057] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0058] Please refer to Figure 1 As shown in the illustration, this application provides a display screen, including a screen body 300, corner frames 200, and a linkage locking device 100. Corner frames 200 are provided at each corner of the back circumferential direction of the screen body 300. The linkage locking device 100 is disposed on multiple corner frames 200. The linkage locking device 100 can lock or unlock the display screen to be installed with adjacent displays above and below, or left and right, to ensure the structural strength and stability of the display screen formed by sequentially connecting multiple displays. The linkage locking device 100 ensures that there are at least two locking points between two adjacent displays, and locking points located on the same side of the displays can be locked or unlocked simultaneously. Therefore, when installing the display screen to be installed with adjacent displays, only one operation is needed to lock or unlock the two adjacent displays to the left and right, and several operations are needed to lock or unlock the two adjacent displays to the top and bottom. There is no need to operate or unlock individual locking points, thus reducing repetitive locking or unlocking actions and making the installation or disassembly process of the display screen simpler and more efficient. It also prevents the stability of the display screen connection from being affected by missing the operation of a single lock.

[0059] Specifically, please refer to Figure 1As shown, in some embodiments of this application, the corner frame 200 includes two side frames 201 connected at both ends, and the angle between the two frame sides is the same as the circumferential angle of the corresponding back of the display screen, as well as an inclined reinforcing beam 202. The two ends of the reinforcing beam 202 are respectively connected to the center of the two side frames 201 to strengthen the corner frame 200. The linkage locking device 100 includes an upper and lower linkage lock 1 and a left and right linkage lock 2. The upper and lower linkage lock 1 includes a bolt group 12 and a first locking groove member 11 that can be locked or unlocked. At least one bolt group 12 is provided on each of the two corner frames 200 on one side along the upper and lower direction of the display screen, and the other two corner frames 200 are provided with first locking groove members 11 that correspond one-to-one with the bolt group 12 and can move and rotate simultaneously. By operating all the first locking groove members 11 to rotate and move simultaneously, all locking groove members and the corresponding bolt group 12 can be locked or unlocked. The left-right linkage lock 2 includes second lock heads 22 and second lock slots 21 that lock or unlock each other. At least one movable second lock head 22 is provided on each of the two corner frames 200 on one side of the display screen, and the other two corner frames 200 are provided with second lock slots 21 that correspond one-to-one with the second lock heads 22 and can rotate simultaneously. Locking or unlocking of all the second lock heads 22 and their corresponding second lock slots 21 can be achieved by moving all the second lock heads 22 and rotating all the second lock slots 21.

[0060] It should be noted that the above directions (up, down, left, right) refer to the orientation based on the formation of a vertical large screen by multiple displays.

[0061] Please refer to Figure 1As shown, in some embodiments of this application, the vertical linkage lock 1 includes two pairs of mutually locking first locking grooves 11 and bolt groups 12. Along the vertical direction, a first locking groove 11 is provided on the side facing away from the display screen on the opposite side of the two corner frames 200 on one side of the display screen. On the other side of the display screen, a bolt group 12 corresponding to the corresponding first locking groove 11 is provided on the opposite side of the two corner frames 200 on the opposite side of the display screen. The two pairs of mutually locking first locking grooves 11 and bolt groups 12 ensure reliable connection strength between two adjacent vertical displays and limit the position of the display screen, preventing positional movement after the two adjacent vertical displays are connected. The horizontal linkage lock 2 includes two pairs of mutually locking second lock heads 22 and second locking grooves 21. Along the horizontal direction, a second locking groove 21 is provided on the side facing away from the display screen on the opposite side of the two corner frames 200 on one side of the display screen. On the other side of the display screen, the two corner frames 200 opposite each other on the frame 201 are provided with second lock heads 22 corresponding to the second locking groove 21 on the side facing away from the display screen. The two pairs of mutually locking second locking grooves 21 and second lock heads 22 ensure reliable connection between the two adjacent vertical displays and limit the position of the display screen, preventing the two adjacent horizontal displays from shifting after connection. Of course, in other embodiments, the mutually locking first locking grooves 11 and bolt groups 12 of the vertical linkage lock 1 may have 4 pairs, 6 pairs, or other quantities, as long as the actual needs are met. This application does not make specific limitations. The following will explain in detail using the vertical linkage lock 1, which includes two pairs of first locking grooves and bolt groups 12, and the horizontal linkage lock 2, which includes two pairs of second locking grooves and second lock heads 22 as examples.

[0062] Please refer to Figures 1-2 As shown, in some feasible embodiments of this utility model, one possible implementation of the left-right linkage lock 2 is to further include a linkage group 23. The linkage group 23 is angle-adjustably disposed between two adjacent corner frames 200, having at least a first angle and a second angle. Both ends of the linkage group 23 are provided with second lock heads 22. One end of the second lock head 22 is a connecting end 221, and the other end is a locking end 222. The connecting end 221 can move through the corner frame 200 and connect to the linkage group 23. The locking end 222 has a third position retracted into the corner frame 200 and a fourth position extended out of the corner frame 200. When the linkage group 23 is at the first angle, the locking end 222 is located in the third position; when the linkage group 23 is at the second angle, the locking end 222 is located in the fourth position. By adjusting the angle of the linkage group 23, the multiple locking ends 222 can be switched between the third and fourth positions, making operation easy.

[0063] For details, please refer to Figures 1-2As shown in the embodiment of this application, the linkage group 23 includes two links 231 and a connector 232 located between the two links 231. The two proximal ends of the two links 231 are coaxially and rotatably mounted on the connector 232, while the two distal ends are slidably mounted on the corresponding corner frames 200. The connector 232 can slide along the left and right direction of the display screen. When the connector 232 moves, it drives the proximal ends of the two links 231 to move together and rotate around the connector 232. The ends of the links 231 that are far from the connector 232 move along the corresponding corner frames 200, thereby changing the angle of the two links 231, thus realizing the angle adjustment of the linkage group 23. The connecting end 221 is rotatably and slidably mounted on the connecting rod 231. As the angle and position of the connecting rod 231 change, the connecting rod 231 rotates relative to the connecting end 221 and drives the connecting end 221 to move along the corner frame 200. By applying a force to the connecting part 232 to move left and right along the display frame, the second lock head 22 can be switched between the third and fourth positions. The structure is simple and the operation is easy.

[0064] The ends of the two connecting rods 231 that are far apart are slidably disposed on the frame 201 of the corresponding corner frame 200 and located between the reinforcing beam 202 and the display screen. The reinforcing beam 202 plays the role of restricting the connecting rods 231, preventing the connecting rods 231 from moving away from the screen body 300 and preventing them from detaching from the frame 201.

[0065] Please refer to Figures 1-2 As shown, one possible way to achieve the connection structure between the connecting end 221 and the connecting rod 231 is that the connecting rod 231 is provided with a sliding groove 2311 extending along the length direction of the connecting rod 231, and the connecting end 221 is provided with a protruding pin facing the connecting rod 231. The protruding pin is slidably and rotatably disposed in the sliding groove 2311. Thus, when the connecting rod assembly 23 switches between the first angle and the second angle, the sliding groove 2311 can rotate and move relative to the protruding pin to counteract the rotation of the connecting rod 231 on the connecting end 221 and the moving force along the vertical direction of the display screen. This allows the connecting rod 231 to act only on the moving force of the connecting end 221 along the horizontal direction of the display screen, enabling the connecting end 221 to move on the corner frame 201.

[0066] Please refer to Figures 1-3As shown, in some embodiments of this application, the left-right linkage lock 2 further includes a second operating lever 24. Two opposing frame edges 201 on the two corner frames 200 on the opposite side of the display screen from the linkage group 23 are provided with rotating grooves. The two ends of the second operating lever 24 are rotatably disposed in the rotating grooves on the corresponding sides, and both ends of the second operating lever 24 are provided with second locking slots 21, meaning the second locking slots 21 are also located in the rotating grooves. The frame edge 201 with the rotating grooves has through holes on the side facing away from the display screen in the left-right direction, allowing the second lock head 22 to pass through and connect with the second locking slot 21. Rotating the second operating lever 24 allows the two second locking slots 21 to rotate simultaneously, resulting in a simple structure and convenient operation.

[0067] Further, please refer to Figures 1-3 As shown, the second locking groove 21 has a through hole 211, and the end of the second operating rod 24 passes through one end of the through hole 211. The diameter of the through hole 211 is larger than the locking end 222 of the second lock head 22. The through hole 211 has a through lock hole 212 on the central hole wall. The lock hole 212 extends circumferentially along the second locking groove 21 and is perpendicular to the axis of the through hole 211. The through hole 211 includes a first hole 2121 and a second hole 2122 that are connected. The locking end 222 includes a limiting head 2221 and a moving section 2222. The limiting head 2221 is located at the end of the moving section 2222 away from the connecting end 221. The diameter of the limiting head 2221 is larger than the diameter of the moving section 2222. The diameter of the first hole 2121 is larger than the diameter of the limiting head 2221. The width of the second hole 2122 is larger than the diameter of the moving section 2222 but smaller than the diameter of the limiting head 2221. Therefore, when the locking end 22 of the second lock head 22 is locked... When aligned with the first hole 2121, the second locking member 2222 can be accommodated in the first hole 2121. As the second operating lever 24 rotates, the moving section 2222 slides in the second hole 2122 until the second hole 2122 abuts against the hole wall away from the first hole 2121 and the moving section 2222. Meanwhile, the limiting head 2221 abuts against the hole wall of the through hole 211 in the second hole 2122 away from the first hole 2121, thereby enabling the second locking groove member 21 to lock the second lock head 22.

[0068] To ensure the stability of the locking mechanism, in some embodiments of this application, there is a gap between the axis of the through hole 211 located at the second hole 2122 and the axis of the second operating lever 24. This allows the second hole 2122 to rotate eccentrically when the second operating lever 24 rotates. Consequently, when the second locking groove 21 locks the second lock head 22, the second hole 2122 can tighten the locking end 222 of the second lock head 22. The interaction force between the second hole 2122 away from the hole wall of the first hole 2121 and the end of the moving section 2222 is relatively large, resulting in a relatively large frictional force between them. This makes the locking between the second lock head 22 and the second locking groove 21 more stable, preventing slight shaking of the display screen after installation and increasing the overall rigidity of the large display screen.

[0069] For ease of use, please refer to... Figures 1-3 As shown, one possible structure of the second operating lever 24 is as follows: the second operating lever 24 includes a lever body 241 and an operating handle 242 located in the middle of the lever body 241. When the display screen is not installed, the operating handle 242 is located within the display screen area and is parallel to or abuts against the display screen to avoid protruding from the display screen, so as to facilitate storage, transportation, etc. When locking the display screen to be installed with an adjacent display screen, a force is first applied to the operating handle 242 in the direction outward of the display screen, so that the second operating lever 24 rotates in the direction outward of the display screen, so that the first hole 2121 of the lock hole 212 is aligned with the locking end 222. At this time, the connecting member 232 is pushed in the direction outward of the display screen. Under the action of the connecting rod 231, the locking end 222 of the second lock head 22 moves from the third position to the fourth position, so that the locking end 222 passes through the first hole 2121 and is accommodated in the through hole 211. Then, the rotational force is continued to be applied to the operating handle 242. At this time, the moving section 2222 on the second lock head 22 moves to the second hole 2122 until it abuts against the hole wall of the second hole 2122 away from the first hole 2121, thereby achieving locking. At this time, the second operating lever 24 rotates exactly 180°, and the operating handle 242 is screwed into the range of the adjacent display screen, abutting against or parallel to the adjacent display screen, to ensure that the operating handle 242 will not protrude from the display screen after locking, avoiding interference with external objects. The unlocking step is exactly the reverse of the locking step, and will not be described in detail here.

[0070] In some embodiments of this application, please refer to Figure 1 , Figure 5As shown, the vertical linkage lock 1 also includes a first operating lever 13. Along the vertical direction, two opposing frame edges 201 on two corner frames 200 located on one side of the display screen are provided with sliding grooves. The two ends of the first operating lever 13 are rotatable and slidably disposed in the corresponding sliding grooves. Both ends of the first operating lever 13 are provided with first locking slots 11, meaning the first locking slots 11 are also located in the sliding grooves. The frame edge 201, along the vertical direction facing away from the display screen, has through holes matching the bolt assembly 12, allowing the bolt assembly 12 to pass through the through holes and connect with the first locking slots 11. Rotating and moving the first operating lever 13 allows for the simultaneous rotation and movement of both first locking slots 11, resulting in a simple structure and convenient operation.

[0071] When one of the displays in a large screen composed of multiple displays needs maintenance, if the bolt group 12 of the upper and lower linkage lock 1 is fixedly set on the corner frame 200, then even if it is in the unlocked state, the display screen still cannot be moved under the limiting action of the first lock slot 11, so it is not convenient to disassemble.

[0072] To address the aforementioned issues, please refer to some embodiments of this application. Figure 1 , Figure 4 As shown, the bolt assembly 12 includes a first lock head 122 and a telescopic handle 121. One end of the first lock head 122 is a limiting end 1221 and the other end is a through end 1222. The through end 1222 can move through the corner frame 200. The limiting end 1221 has a first position retracted into the corner frame 200 and a second position extended out of the corner frame 200. One end of the telescopic handle 121 has a boss 1211 protruding towards the corner frame 200. The boss 1211 abuts against the corner frame 200. The through end 1222 is connected to the boss 1211 end of the telescopic handle 121. When pressure is applied to the side of the telescopic handle 121 away from the boss 1211 towards the corner, the telescopic handle 121 rotates around the point of contact between the boss 1211 and the corner frame 200, thereby causing the through end 1222 to move along the corner frame 200, so that the limiting end 1221 can switch from the second position to the first position. At this time, the first lock head 122 disengages from the first lock groove 11, and the display screen can be moved, thereby enabling disassembly.

[0073] Further, please refer to Figure 1 , Figures 4-5As shown, in some embodiments of this application, the limiting end 1221 includes a sliding part 1201 and a limiting part 1202, the diameter of the limiting part 1202 being larger than the diameter of the sliding part 1201. The first locking groove member 11 is provided with a through hole 111, the end of the first operating rod 13 passing through one end of the through hole 111, the diameter of the through hole 111 being larger than the limiting end 1221 of the first lock head 122, the through hole 111 having a accommodating hole 112, a sliding hole 113 and a limiting hole 114 connected in sequence on the central hole wall, the sliding hole 113 extending along the axial direction of the first operating rod 13, the accommodating hole 112 and the limiting hole 114 being correspondingly provided on the same side of both ends of the sliding end, the diameter of the accommodating hole 112 being larger than the diameter of the limiting part 1202, and the width of the sliding hole 113 and the diameter of the limiting hole 114 being smaller than the diameter of the limiting part 1202 but larger than the diameter of the sliding part 1201. Therefore, when the limiting end 1221 of the first lock head 122 is aligned with the receiving hole 112, it can enter the through hole 111 through the receiving hole 112. As the first operating lever 13 rotates, the sliding part 1201 enters the sliding hole 113. As the first operating lever 13 moves, the sliding part 1201 moves along the sliding hole 113 to be aligned with the limiting hole 114. When the first operating lever 13 is rotated in the opposite direction, the sliding part 1201 slides into the limiting hole 114. The limiting hole 114 is away from the hole wall of the sliding hole 113 and abuts against the sliding part 1201. The limiting part 1202 abuts against the hole wall of the through hole 111 at the limiting hole 114, thereby realizing that the first lock groove member 11 locks the first lock head 122.

[0074] To ensure the stability of the lock, please refer to... Figure 1 , Figures 4-5 As shown, in some embodiments of this application, the axis of the through hole 111 located at the limiting hole 114 is spaced from the axis of the first operating lever 13. Thus, when the first operating lever 13 rotates, the limiting hole 114 rotates eccentrically. Thus, when the first locking groove 11 locks the first lock head 122, the limiting hole 114 can tighten the sliding part 1201 of the first lock head 122. The interaction force between the limiting hole 114 away from the hole wall of the sliding hole 113 and the sliding part 1201 is relatively large, so the friction between the two is also relatively large. This makes the locking between the first lock head 122 and the first locking groove 11 more stable, preventing the upper and lower displays from slightly shifting relative to each other after locking, thus avoiding shaking of the display and increasing the rigidity of the large display screen.

[0075] For accurate alignment of the display screen during installation, please refer to... Figure 1 , Figures 4-5As shown, in some embodiments of this application, magnetic components are provided on the corner frames 200 along the upper and lower sides of the display screen. Therefore, when the display screen to be installed is placed on top of the already installed display screen, the magnetic force between the magnetic components can quickly and accurately install the display screen to be installed, so as to ensure that the first lock head 122 is aligned with the first lock groove 11 and the second lock head 22 is aligned with the second lock groove 21, which facilitates subsequent locking.

[0076] Normally, the first lock head 122 is in the first position. Therefore, with the magnetic components precisely aligned, the limiting end 1221 of the first lock head 122 is accommodated in the through hole 111 through the receiving hole 112. Please refer to... Figure 1 , Figures 4-5 As shown in the embodiments of this application, the structure of the first operating lever 13 is the same as that of the second operating lever 24. When the display screen to be installed is not installed, the operating handle 242 is located within the range of the display screen to be installed and parallel to the screen body 300 to avoid protruding from the display screen, thereby facilitating movement and storage. When the display screen to be installed needs to be installed with adjacent upper and lower display screens, a rotational force is first applied to the operating handle 242 in a direction away from the display screen to be installed, so that the sliding part 1201 of the limiting end 1221 of the first lock head 122 slides from the receiving hole 112 into the sliding hole 113. Then, a pushing force is applied to the operating handle 242 in the left and right direction, so that the sliding part 1201 moves along the sliding hole 113 to be aligned with the limiting hole 114. A reverse rotational force is applied to the operating handle 242, and the sliding part 1201 slides into the limiting hole 114 until it abuts against the hole wall of the limiting hole 114. At this time, the operating handle 242 returns to the initial angle, thereby ensuring that the operating handle 242 will not protrude from the display screen after locking, avoiding interference with external objects. The unlocking steps are the exact opposite of the locking steps, so I won't go into detail here.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such 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 this utility model.

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