Display screen box mounting and fixing device and display screen

Abstract

The utility model belongs to the technical field of display screens, and particularly relates to a display screen box installing and fixing device and a display screen. Comprising a corner buckling piece and a locking shaft. The corner buckling piece comprises a base plate, a first vertical plate and a second vertical plate. The free end of the first vertical plate and the free end of the second vertical plate extend outwards to form a first connecting wing and a second connecting wing respectively, and axial limiting pieces matched with the connecting screw rod are arranged on the first connecting wing and the second connecting wing so as to limit the axial displacement of the connecting screw rod. The locking shaft rotationally penetrates through the first vertical plate and the second vertical plate in sequence, the shaft section, corresponding to the containing cavity, of the locking shaft is provided with a non-circular section, and the non-circular section is provided with a plane part; when the plane part faces the accommodating cavity, an assembly gap is formed between the non-circular section section and the accommodating cavity; when the curved surface part of the non-circular section section of the locking shaft faces the accommodating cavity, the peripheral surface of the curved surface part is propped against the outer wall surface of the fixing rod; the assembling end of the locking shaft is provided with an axial restraining structure expanding in the radial direction so as to limit the axial displacement of the locking shaft.

Description

Technical Field

[0001] This utility model belongs to the field of display screen technology, and in particular relates to a display screen cabinet mounting and fixing device and a display screen. Background Technology

[0002] With the rapid development of modern technology, large LED displays have been widely used in advertising, information display, stage performances, and many other fields. Large LED displays are typically composed of numerous individual display cabinets assembled together. The rationality and stability of their installation and fixing structure play a crucial role in the normal operation and safety of the display.

[0003] In traditional display cabinet installation and fixing methods, the corner clips typically use a combination of a U-shaped corner clip 10 and a straight corner clip 11. The corner clips are then fixed to the fixing rod 1 by installing bolts at the four corners. For a detailed structure, please refer to [reference needed]. Figure 1 However, in real-world applications, especially for taller display screens, this installation method has revealed a series of significant problems.

[0004] First, traditional installation methods involve numerous components, each requiring manual assembly and securing. During assembly, some bolts, though inserted into their corresponding holes, are often not fully tightened. In this situation, workers operating at heights in confined spaces face significant challenges; even slight swaying or accidental contact can easily cause these loosened components to fall off. Furthermore, bolts require washers before insertion; however, workers at heights are prone to hand tremors, causing washers to easily detach. This risk of components falling from heights poses a serious threat to the safety of personnel and equipment below. A fall could cause irreparable damage, disrupt installation, increase costs, and create significant safety hazards.

[0005] Secondly, the combination of numerous components greatly increases the difficulty of working at heights. Workers at height must precisely position and install each component, as well as perform delicate operations such as tightening bolts. This makes manual operation extremely inconvenient, the installation process cumbersome and lengthy, requiring significant manpower and time costs, and resulting in low installation efficiency.

[0006] Based on this, the present invention provides a novel display screen cabinet mounting and fixing device and display screen to overcome the above-mentioned defects. Utility Model Content

[0007] One objective of this utility model is to provide a display screen cabinet mounting and fixing device and a display screen. The display screen cabinet mounting and fixing device is an integral component. When this integral component is installed on the fixing rod, the risk of parts falling from a height during the installation process is reduced, which effectively ensures the safety of high-altitude operations.

[0008] The present invention adopts the following technical solution: a display screen cabinet mounting and fixing device, including corner fasteners and locking shafts;

[0009] The corner fastener includes a base plate, and a first vertical plate and a second vertical plate disposed opposite to each other on both sides of the base plate. The first vertical plate, the second vertical plate and the base plate together form a receiving cavity for accommodating the fixing rod.

[0010] The free ends of the first vertical plate and the second vertical plate extend outward to form a first connecting wing and a second connecting wing, respectively. At least two first mounting holes are provided on the first connecting wing and the second connecting wing, which are spaced apart along the length direction of the corner clip. A connecting screw for connecting the display screen housing is inserted into each first mounting hole. An axial limiting member that cooperates with the connecting screw is provided on the first connecting wing and the second connecting wing to limit the axial displacement of the connecting screw.

[0011] The locking shaft rotatably passes through the first vertical plate and the second vertical plate in sequence. The shaft segment of the locking shaft corresponding to the receiving cavity has a non-circular cross-section segment, and the non-circular cross-section segment is provided with a flat portion. When the flat portion faces the receiving cavity, an assembly gap is formed between the non-circular cross-section segment and the receiving cavity. When the locking shaft is rotated to the point where the curved surface of the non-circular cross-section segment faces the receiving cavity, the outer peripheral surface of the curved surface abuts against the outer wall surface of the fixing rod.

[0012] The locking shaft has an operating end and an assembly end. The assembly end of the locking shaft is provided with an axial constraint structure that extends radially to limit the axial displacement of the locking shaft.

[0013] Furthermore, the substrate has a padding layer on the side facing the receiving cavity.

[0014] Furthermore, the substrate, the first vertical plate, the second vertical plate, the first connecting wing, and the second connecting wing are sheet metal structures integrally formed by continuous bending of metal sheets.

[0015] Furthermore, a first pad and a second pad are respectively fixedly provided on the side of the first connecting wing and the second connecting wing near the receiving cavity. The first pad and the second pad are each provided with a second mounting hole that is opposite to the first mounting hole. The connecting screw passes through the first mounting hole and the second mounting hole in sequence and is threadedly connected to the display screen housing.

[0016] Furthermore, the connecting screw is divided into a screw head, a smooth shaft, and a threaded connection part arranged along the axial direction. The outer diameter of the threaded connection part and the screw head is larger than the outer diameter of the smooth shaft part.

[0017] The axial limiting member is disposed on the first pad and the second pad. The axial direction of the axial limiting member is perpendicular to the axial direction of the connecting screw, and the end of the axial limiting member is close to the outer wall of the optical axis portion of the connecting screw and forms a limiting fit with the threaded connection portion.

[0018] Furthermore, the diameter of the first mounting hole is equal to that of the second mounting hole, and is smaller than the outer diameter of the screw head.

[0019] Furthermore, the first pad has stepped through holes, the stepped through holes including a first through hole and a second through hole connected in sequence; the first vertical plate has a third through hole; the second vertical plate has a fourth through hole; and the second pad has blind holes.

[0020] The mounting end of the locking shaft passes through the first through hole, the second through hole, the third through hole, and the fourth through hole in sequence and is then inserted into the blind hole; wherein the diameters of the second through hole and the third through hole are larger than the maximum outer dimension of the axial constraint structure; the diameters of the first through hole and the fourth through hole are smaller than the maximum outer dimension of the axial constraint structure, so as to form a bidirectional axial constraint.

[0021] Furthermore, the operating end of the locking shaft is wrapped with a silicone layer.

[0022] Furthermore, both the first vertical plate and the second vertical plate are perpendicular to the substrate;

[0023] And / or, both the first connecting wing and the second connecting wing are parallel to the substrate, and the first connecting wing and the second connecting wing are located in the same plane.

[0024] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0025] In this utility model, the display screen cabinet mounting and fixing device effectively restricts the axial displacement of the connecting screw by providing axial limiting members on the first and second connecting wings that cooperate with the connecting screw, preventing the connecting screw from falling out of the mounting hole. Furthermore, the locking shaft assembly end is provided with a radially expanding axial constraint structure to restrict the axial displacement of the locking shaft and prevent it from falling off, thus forming a single integrated component for the display screen cabinet mounting and fixing device. When this integrated component is installed on the fixing rod, the risk of components falling from height during installation is significantly reduced, effectively ensuring the safety of high-altitude operations.

[0026] Furthermore, when assembling the display screen cabinet mounting and fixing device, the operator first holds the operating end of the locking shaft and pulls its assembly end to the side of the first vertical plate away from the second vertical plate. Then, the receiving cavity of the display screen cabinet mounting and fixing device is aligned and fitted onto the preset position of the fixing rod. With the flat part facing the receiving cavity, the assembly end of the locking shaft is passed through the first and second vertical plates in sequence. Because an assembly gap is formed between the non-circular cross-section and the receiving cavity when the flat part faces the receiving cavity, this design greatly facilitates the insertion of the locking shaft and effectively reduces the installation difficulty. After insertion, the operator only needs to rotate the locking shaft to make the outer circumference of the curved part tightly abut against the outer wall of the fixing rod, easily achieving the locking and fixing of the display screen cabinet mounting and fixing device on the fixing rod. The entire process greatly simplifies the installation procedure and improves installation efficiency.

[0027] The second objective of this utility model is to provide a display screen, which includes a plurality of display screen housings and a display screen housing mounting and fixing device, wherein the display screen housing mounting and fixing device is the aforementioned display screen housing mounting and fixing device. Attached Figure Description

[0028] 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the assembled structure of the display screen cabinet mounting and fixing device and the fixing rod according to a specific embodiment of this utility model;

[0030] Figure 2 This is a schematic diagram of the display screen cabinet mounting and fixing device according to a specific embodiment of the present utility model;

[0031] Figure 3 for Figure 1 A partial cross-sectional view of the curved surface of the locking shaft facing the receiving cavity;

[0032] Figure 4 for Figure 1 Partial cross-section of the flat portion of the locking shaft facing the receiving cavity. Figure 1 The main focus is on showcasing the structural design of the connecting screw and the axial limiting component;

[0033] Figure 5 for Figure 1 Partial cross-section of the flat portion of the locking shaft facing the receiving cavity. Figure 2 The main focus is on showcasing the structural design of the locking shaft;

[0034] Figure 6 for Figure 1 Schematic diagram of the installation process of the mounting and fixing device for the central display screen cabinet;

[0035] Figure 7 This is a photo of a real object with a corner notch, based on existing technology.

[0036] The components include: a fixing rod 1, a U-shaped buckle 10, a straight buckle 11; a buckle piece 2, a base plate 20, a first vertical plate 21, a third through hole 211, a second vertical plate 22, a fourth through hole 221, a first connecting wing 23, a second connecting wing 24, a first mounting hole 25; a locking shaft 3, a flat part 30, an operating end 31, an assembly end 32; a connecting screw 4, a screw head 40, a light shaft part 41, a threaded connection part 42; an axial limiting component 5; a first pad 6, a second mounting hole 60, a first through hole 61, a second through hole 62; a second pad 7, a blind hole 70; and an axial constraint structure 8. Detailed Implementation

[0037] 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 this utility model, and 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 this utility model.

[0038] The following is in conjunction with the appendix Figure 1 To be continued Figure 6 The present invention will be described in detail with reference to specific embodiments:

[0039] like Figures 1 to 6 As shown, this utility model provides a display screen cabinet mounting and fixing device, which is used to lock and fix the display screen cabinet to a fixing rod 1, thereby realizing the fixed installation of the display screen cabinet. The display screen cabinet mounting and fixing device includes corner fasteners 2 and locking shafts 3.

[0040] The corner fastener 2 includes a base plate 20, and a first vertical plate 21 and a second vertical plate 22 disposed opposite to each other on both sides of the base plate 20. The first vertical plate 21, the second vertical plate 22, and the base plate 20 together form a receiving cavity for accommodating the fixing rod 1. In this embodiment, the first vertical plate 21 and the second vertical plate 22 are both perpendicular to the base plate 20, and the fixing rod 1 is a square tube. Correspondingly, three sides of the square tube are in contact with the first vertical plate 21, the second vertical plate 22, and the base plate 20, respectively, to enhance the connection strength.

[0041] The free ends of the first vertical plate 21 and the second vertical plate 22 extend outward to form a first connecting wing 23 and a second connecting wing 24, respectively. Each of the first connecting wing 23 and the second connecting wing 24 has at least two first mounting holes 25 spaced apart along the length of the corner fastener 2. A connecting screw 4 for connecting the display screen housing passes through each first mounting hole 25. The first connecting wing 23 and the second connecting wing 24 are provided with axial limiting members 5 that cooperate with the connecting screw 4 to limit the axial displacement of the connecting screw 4 and prevent the connecting screw 4 from falling out of the mounting hole. In this embodiment, the first connecting wing 23 and the second connecting wing 24 are both parallel to the substrate 20, and the first connecting wing 23 and the second connecting wing 24 are located in the same plane.

[0042] The locking shaft 3 rotatably passes through the first vertical plate 21 and the second vertical plate 22 in sequence. The shaft segment of the locking shaft 3 corresponding to the receiving cavity has a non-circular cross-section segment, and the non-circular cross-section segment is provided with a flat portion 30. When the flat portion 30 faces the receiving cavity, as... Figure 4 , 5 As shown, an assembly gap is formed between the non-circular cross-section segment and the receiving cavity, facilitating the locking shaft 3 to sequentially pass through the first vertical plate 21 and the second vertical plate 22 along the axial direction; when the locking shaft 3 rotates until the curved surface of the non-circular cross-section segment faces the receiving cavity, as... Figure 3 As shown, the outer peripheral surface of the curved surface abuts against the outer wall surface of the fixing rod 1, thereby locking and fixing the display screen cabinet mounting and fixing device on the fixing rod 1.

[0043] The locking shaft 3 has an operating end 31 and an assembly end 32. The assembly end 32 of the locking shaft 3 is provided with an axial constraint structure 8 that extends radially to limit the axial displacement of the locking shaft 3 and prevent the locking shaft 3 from falling off.

[0044] Preferably, the locking shaft 3 is positioned between two adjacent first mounting holes 25. As shown in this embodiment, there are two first mounting holes 25, and the locking shaft 3 is positioned at the exact center of the two first mounting holes 25.

[0045] In this utility model, the display screen housing mounting and fixing device effectively restricts the axial displacement of the connecting screw 4 by providing axial limiting members 5 on the first connecting wing 23 and the second connecting wing 24 that cooperate with the connecting screw 4, preventing the connecting screw 4 from falling out of the mounting hole. Furthermore, the mounting end 32 of the locking shaft 3 is provided with a radially expanding axial constraint structure 8 to restrict the axial displacement of the locking shaft 3 and prevent it from falling out, thus forming a single integrated component for the display screen housing mounting and fixing device. When this integrated component is installed on the fixing rod 1, the risk of components falling from height during installation is significantly reduced, effectively ensuring the safety of high-altitude operations.

[0046] Furthermore, when assembling the display screen housing mounting and fixing device, the operator first holds the operating end 31 of the locking shaft 3 and pulls its assembly end 32 to the side of the first vertical plate 21 away from the second vertical plate 22, such as... Figure 6 As shown. Then, align the receiving cavity of the display screen housing mounting device and fit it onto the preset position of the fixing rod 1. With the flat part 30 facing the receiving cavity, pass the mounting end 32 of the locking shaft 3 sequentially through the first vertical plate 21 and the second vertical plate 22, as shown. Figure 5 As shown. Because when the flat part 30 faces the receiving cavity, an assembly gap will be formed between the non-circular cross-section and the receiving cavity. This design greatly facilitates the insertion of the locking shaft 3 and effectively reduces the installation difficulty. After insertion, the operator only needs to rotate the locking shaft 3 to make the outer peripheral surface of the curved part tightly abut against the outer wall of the fixing rod 1, which can easily achieve the locking and fixing of the display cabinet mounting device on the fixing rod 1. The whole process greatly simplifies the installation process and improves installation efficiency.

[0047] Furthermore, in some specific embodiments, the substrate 20 is provided with a soft pad layer on the side facing the receiving cavity. When the soft pad layer contacts the fixing rod 1, it can immediately form a preliminary friction limiting effect, effectively increasing the coefficient of friction. During the rotation of the locking shaft 3, the soft pad layer will be compressed and deformed. This compression increases the contact pressure between the fixing rod 1 and the corner fastener 2, thereby increasing the friction between the two and further enhancing the tightness of the connection.

[0048] Furthermore, in some specific embodiments, such as Figure 2 As shown, the substrate 20, the first vertical plate 21, the second vertical plate 22, the first connecting wing 23, and the second connecting wing 24 are sheet metal structures integrally formed from metal sheets through continuous bending. The integral forming of the substrate 20, the first vertical plate 21, the second vertical plate 22, etc., into a sheet metal structure reduces costs, minimizes material waste and processing steps, and eliminates weak points in the connections, thereby improving strength and stability. It also ensures consistent dimensional accuracy, facilitating installation and mass production.

[0049] Furthermore, in some specific embodiments, a first pad 6 and a second pad 7 are respectively fixedly disposed on the side of the first connecting wing 23 and the second connecting wing 24 near the receiving cavity. Both the first pad 6 and the second pad 7 are provided with a second mounting hole 60 opposite to the first mounting hole 25. The connecting screw 4 passes through the first mounting hole 25 and the second mounting hole 60 in sequence and is threadedly connected to the display screen housing to achieve fixed installation of the display screen housing. The provision of the first pad 6 and the second pad 7 can increase the connection strength between the connecting screw 4 and the corner clip 2. It should be noted that the present invention does not limit how the first pad 6 and the second pad 7 are fixedly installed on the first connecting wing 23 and the second connecting wing 24; bolt and screw connections, snap-fit ​​connections, or welding are all acceptable.

[0050] Furthermore, in some specific embodiments, a design scheme for preventing the connecting screw 4 from falling out of the mounting hole is provided, and the specific technical solution is as follows:

[0051] The connecting screw 4 is divided into a screw head 40 arranged axially, a smooth shaft portion 41, and a threaded connection portion 42, as shown below. Figure 3 , 4 As shown. The outer diameters of both the threaded connection portion 42 and the screw head 40 are larger than the outer diameter of the optical axis portion 41. The screw head 40 can be designed with reference to the bolt head structure. In this embodiment, the first mounting hole 25 and the second mounting hole 60 are equal in size and smaller than the outer diameter of the screw head 40 of the connecting screw 4. Correspondingly, the connecting screw 4 will not detach from the direction along the screw head 40 to the threaded connection portion 42.

[0052] The axial limiting member 5 is disposed on the first pad 6 and the second pad 7. The axial direction of the axial limiting member 5 is perpendicular to the axial direction of the connecting screw 4, and the end of the axial limiting member 5 is close to the outer wall of the optical axis portion 41 of the connecting screw 4 and forms a limiting fit with the threaded connection portion 42, thereby preventing the connecting screw 4 from falling off along the direction from the threaded connection portion 42 to the screw head 40, thereby realizing the bidirectional axial limiting of the connecting screw 4.

[0053] In this embodiment, the axial limiting component 5 can be a bolt, screw, etc., which can be designed and selected by those skilled in the art based on the actual situation.

[0054] Furthermore, in some specific embodiments, a detailed design for preventing the locking shaft 3 from falling off is provided. The specific design scheme is as follows: a stepped through hole is also provided on the first pad 6, the stepped through hole including a first through hole 61 and a second through hole 62 connected in sequence; a third through hole 211 is provided on the first vertical plate 21; a fourth through hole 221 is provided on the second vertical plate 22; a blind hole 70 is provided on the second pad 7, such as... Figure 5 , 6 As shown.

[0055] The mounting end 32 of the locking shaft 3 passes sequentially through the first through hole 61, the second through hole 62, the third through hole 211, and the fourth through hole 221 before being inserted into the blind hole 70. The diameters of the second through hole 62 and the third through hole 211 are larger than the maximum outer dimension of the axial constraint structure 8; the diameters of the first through hole 61 and the fourth through hole 221 are smaller than the maximum outer dimension of the axial constraint structure 8, thus forming a bidirectional axial constraint. In this embodiment, the screw structure is installed perpendicular to the axial direction of the locking shaft 3 as the axial constraint structure 8, resulting in low manufacturing costs.

[0056] In use, because the second through hole 62 and the third through hole 211 have relatively large diameters, the mounting end 32 of the locking shaft 3 can be pulled to the side of the first vertical plate 21 away from the second vertical plate 22; and because the first through hole 61 has a relatively small diameter, it can prevent the locking shaft 3 from being completely pulled out, thereby preventing the locking shaft 3 from separating from the corner fastener 2. Afterwards, align the receiving cavity of the display screen housing mounting and fixing device and fit it onto the preset position of the fixing rod 1. When the flat part 30 faces the receiving cavity, pass the mounting end 32 of the locking shaft 3 through the first vertical plate 21 and the second vertical plate 22 in sequence. At this time, the fourth through hole 221 has a relatively small diameter, which can prevent the locking shaft 3 from being over-inserted, achieving bidirectional axial limiting.

[0057] Furthermore, in some specific embodiments, the operating end 31 of the locking shaft 3 is wrapped with a silicone layer. The silicone layer is soft and has good anti-slip properties, effectively conforming to the operator's hand. In addition, friction textures can be provided on the outer surface of the silicone layer, which further increases the surface roughness, thereby increasing the friction when the hand grips the operating end 31.

[0058] It should be noted that the connecting screw is fitted with ordinary washers and elastic washers, and then inserted into the corresponding mounting holes. These are all conventional technical means and will not be described in detail in this utility model.

[0059] Based on the aforementioned display screen cabinet mounting and fixing device, this utility model also provides a display screen, which includes a plurality of display screen cabinets and a display screen cabinet mounting and fixing device, wherein the display screen cabinet mounting and fixing device is the aforementioned display screen cabinet mounting and fixing device. This utility model's display screen incorporates all the technical solutions of the aforementioned display screen cabinet mounting and fixing device and possesses at least all the advantages of the aforementioned display screen cabinet mounting and fixing device, which will not be elaborated further here.

[0060] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A display screen cabinet mounting and fixing device, characterized in that: Includes corner clips and locking pins; The corner fastener includes a base plate, and a first vertical plate and a second vertical plate disposed opposite to each other on both sides of the base plate. The first vertical plate, the second vertical plate and the base plate together form a receiving cavity for accommodating the fixing rod. The free ends of the first vertical plate and the second vertical plate extend outward to form a first connecting wing and a second connecting wing, respectively. At least two first mounting holes are provided on the first connecting wing and the second connecting wing, which are spaced apart along the length direction of the corner clip. A connecting screw for connecting the display screen housing is inserted into each first mounting hole. An axial limiting member that cooperates with the connecting screw is provided on the first connecting wing and the second connecting wing to limit the axial displacement of the connecting screw. The locking shaft rotatably passes through the first vertical plate and the second vertical plate in sequence. The shaft segment of the locking shaft corresponding to the receiving cavity has a non-circular cross-section segment, and the non-circular cross-section segment is provided with a flat portion. When the flat portion faces the receiving cavity, an assembly gap is formed between the non-circular cross-section segment and the receiving cavity. When the locking shaft is rotated to the point where the curved surface of the non-circular cross-section segment faces the receiving cavity, the outer peripheral surface of the curved surface abuts against the outer wall surface of the fixing rod. The locking shaft has an operating end and an assembly end. The assembly end of the locking shaft is provided with an axial constraint structure that extends radially to limit the axial displacement of the locking shaft.

2. The display screen cabinet mounting and fixing device according to claim 1, characterized in that: The substrate has a padding layer on the side facing the receiving cavity.

3. The display screen cabinet mounting and fixing device according to claim 1, characterized in that: The substrate, the first vertical plate, the second vertical plate, the first connecting wing, and the second connecting wing are sheet metal structures integrally formed by continuous bending of metal plates.

4. The display screen cabinet mounting and fixing device according to claim 1, characterized in that: A first pad and a second pad are respectively fixedly provided on the side of the first connecting wing and the second connecting wing near the receiving cavity. The first pad and the second pad are each provided with a second mounting hole that is opposite to the first mounting hole. The connecting screw passes through the first mounting hole and the second mounting hole in sequence and is threadedly connected to the display screen housing.

5. The display screen cabinet mounting and fixing device according to claim 4, characterized in that: The connecting screw is divided into a screw head, a smooth shaft, and a threaded connection part arranged along the axial direction. The outer diameter of the threaded connection part and the screw head is larger than the outer diameter of the smooth shaft part. The axial limiting member is disposed on the first pad and the second pad. The axial direction of the axial limiting member is perpendicular to the axial direction of the connecting screw, and the end of the axial limiting member is close to the outer wall of the optical axis portion of the connecting screw and forms a limiting fit with the threaded connection portion.

6. The display screen cabinet mounting and fixing device according to claim 5, characterized in that: The first mounting hole has the same diameter as the second mounting hole, but is smaller than the outer diameter of the screw head.

7. The display screen cabinet mounting and fixing device according to claim 4, characterized in that: The first pad has a stepped through hole, which includes a first through hole and a second through hole connected in sequence; the first vertical plate has a third through hole; the second vertical plate has a fourth through hole; and the second pad has a blind hole. The mounting end of the locking shaft passes through the first through hole, the second through hole, the third through hole, and the fourth through hole in sequence and is then inserted into the blind hole; wherein the diameters of the second through hole and the third through hole are larger than the maximum outer dimension of the axial constraint structure; the diameters of the first through hole and the fourth through hole are smaller than the maximum outer dimension of the axial constraint structure, so as to form a bidirectional axial constraint.

8. The display screen cabinet mounting and fixing device according to claim 7, characterized in that: The operating end of the locking shaft is covered with a silicone layer.

9. The display screen cabinet mounting and fixing device according to claim 1, characterized in that: Both the first vertical plate and the second vertical plate are perpendicular to the substrate; And / or, both the first connecting wing and the second connecting wing are parallel to the substrate, and the first connecting wing and the second connecting wing are located in the same plane.

10. A display screen, characterized in that: It includes several display screen cabinets and display screen cabinet mounting and fixing devices, wherein the display screen cabinet mounting and fixing devices are the display screen cabinet mounting and fixing devices according to any one of claims 1 to 9.

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