Spliced display screen box

Abstract

The utility model relates to the technical field of display screens, in particular to a spliced display screen box body, which comprises a plurality of box bodies, two adjacent box bodies are respectively a first box body and a second box body, and a first positioning hole and a second positioning hole are respectively arranged on adjacent side walls of the first box body and the second box body. The first positioning hole penetrates through the side wall of the first box body, a screw hole is formed in the side wall, away from the end of the second positioning hole on one side of the first box body, of the second box body, elastic pins are arranged in the first positioning hole and the second positioning hole, and bolts penetrate through the elastic pins and the screw hole. According to the spliced display screen box body, the adjacent display screen box bodies can be positioned and connected through the design of the corresponding first positioning holes, the corresponding second positioning holes and the corresponding screw holes in the adjacent display screen box bodies in cooperation with the bolts and the elastic pins, and under the condition that reasonable errors exist in machining of the positioning holes in the display screen box bodies, the positioning accuracy of the display screen box bodies is greatly improved. And the elastic pin can be automatically adjusted so as to ensure the accuracy and stability of positioning.

Description

Technical Field

[0001] The utility model relates to the technical field of display screens, in particular to a spliced ​​display screen box. Background Art

[0002] As for the technology of splicing display cabinets, at present, the positioning and connection between display cabinets are generally achieved by using positioning pins and connecting bolts. The installation of positioning pins and connecting bolts requires the opening of positioning holes and connecting screw holes on the display cabinet. This takes up more space and requires a large processing cost. Of course, there are also methods that combine the positioning pins and connecting bolts into one, where the end of the connecting bolt is a screw rod and the middle part is a positioning rod. This form uses the positioning rod for positioning and the screw rod for connection.

[0003] However, this form also has certain defects. First, the positioning pin and the connecting bolt need to be combined into one, which requires customization. The processing cost of the workpiece is relatively high. In addition, high precision requirements are required for the workpiece and the positioning hole to achieve high-precision positioning. Utility Model Content

[0004] In order to solve the above technical deficiencies, the utility model provides a spliced ​​display screen box, which reduces the accuracy requirements for the first positioning holes and the second positioning holes, but can ensure the positioning accuracy.

[0005] The utility model discloses a spliced ​​display screen box, comprising a plurality of boxes, wherein two adjacent boxes are respectively a first box and a second box, and a first positioning hole and a second positioning hole are respectively arranged on the side walls adjacent to the first box and the second box, the central axis of the first positioning hole coincides with the central axis of the second positioning hole, and the diameter of the first positioning hole is consistent with the diameter of the second positioning hole, the first positioning hole passes through the side wall of the first box, and a screw hole is arranged on the side wall of the second box at the end of the second positioning hole away from the first box, the screw hole coincides with the central axis of the second positioning hole, and the inner diameter of the screw hole is smaller than the inner diameter of the second positioning hole; an elastic pin is arranged in the first positioning hole and the second positioning hole, and a bolt is passed through the elastic pin and the screw hole; the outer diameter of the elastic pin in a natural state is greater than or equal to the diameter of the first positioning hole, and the minimum outer diameter of the elastic pin in a compressed state is less than or equal to the diameter of the first positioning hole.

[0006] As an optimization, the bolt includes a rod body with an external thread and a bolt head located at the end of the rod body, the elastic pin is sleeved on the rod body, the diameter of the bolt head is larger than the diameter of the first positioning hole, the diameter of the bolt head is larger than the inner diameter of the elastic pin in a natural state, the outer diameter of the rod body is smaller than the minimum inner diameter of the elastic pin in a compressed state, and the elastic pin is an elastic cylindrical structure with an opening set at one of the circumferential side walls, the opening penetrates the side wall thickness of the cylindrical structure, and the opening penetrates the side wall of the cylindrical structure axially.

[0007] As an optimization, the rod body of the bolt near the bolt head end is a smooth rod, and the rod body of the bolt away from the bolt head end is a screw rod, and the smooth rod and the screw rod are an integral structure; a step is formed at the junction of the screw rod and the smooth rod, the outer diameter of the smooth rod is smaller than the outer diameter of the screw rod, the outer diameter of the smooth rod is smaller than the minimum inner diameter of the elastic pin in the compressed state, the outer diameter of the step is larger than the inner diameter of the elastic pin in the natural state, and the outer diameter of the step is smaller than the diameter of the first positioning hole.

[0008] As an optimization, a retaining ring is sleeved on the smooth rod, and the elastic pin is sleeved on the smooth rod between the retaining ring and the bolt head. The outer diameter of the step is smaller than the outer diameter of the retaining ring, the outer diameter of the retaining ring is larger than the inner diameter of the elastic pin in its natural state, and the outer diameter of the retaining ring is smaller than the minimum outer diameter of the elastic pin in its compressed state.

[0009] As an optimization, a compression spring is sleeved on the outside of the elastic pin, the inner diameter of the compression spring is larger than the outer diameter of the elastic pin in a natural state, and the inner diameter of the compression spring is smaller than the outer diameter of the bolt head.

[0010] As an optimization, a limiting ring is sleeved on the polished rod between the bolt head and the compression spring, the inner diameter of the limiting ring is smaller than the outer diameter of the bolt head, and the outer diameter of the limiting ring is larger than the inner diameter of the compression spring.

[0011] The utility model provides a spliced ​​display screen box body, which can realize the positioning and connection between adjacent display screen boxes through the design of corresponding first positioning holes, second positioning holes and screw holes on adjacent display screen boxes, and in combination with bolts and elastic pins. In addition, when there is a reasonable error in the machining of the positioning holes on the display screen boxes, the elastic pins can be automatically adjusted to ensure accurate and stable positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional schematic diagram of two adjacent display screen boxes of the present utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the bolt and the elastic pin of Example 1 of the utility model;

[0014] Figure 3 This is an exploded view of the structure of the bolt and the elastic pin of Example 1 of the utility model;

[0015] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present utility model;

[0016] Figure 5 for Figure 4 A local enlarged schematic diagram of point A;

[0017] Figure 6 for Figure 4 A local enlarged schematic diagram of point B;

[0018] Figure 7 for Figure 4A schematic diagram of a local cross section at A;

[0019] Figure 8 for Figure 4 A schematic diagram of a local cross section at point B;

[0020] Fig. 9 This is a schematic diagram of the structure of the bolt and the elastic pin of Example 2 of the utility model;

[0021] Fig.10 This is a structural cross-sectional view of a bolt and an elastic pin in Example 2 of the utility model;

[0022] Fig.11 This is a structural stereogram of a bolt and an elastic pin according to Embodiment 2 of the present utility model;

[0023] Fig.12 This is a schematic diagram of the structure of the bolt and the elastic pin of Example 3 of the utility model;

[0024] Fig.13 This is a structural cross-sectional view of a bolt and an elastic pin in Example 3 of the utility model;

[0025] Fig.14 This is a structural explosion diagram of the bolt and the elastic pin of Example 3 of the utility model. DETAILED DESCRIPTION

[0026] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0027] Embodiment 1:

[0028] like Figure 2 , Figure 3 As shown, the utility model discloses a spliced ​​display screen box, such as Figure 1As shown, it includes a plurality of boxes 6, two adjacent boxes 6 are respectively a first box 6-1 and a second box 6-2, and a first positioning hole 13 and a second positioning hole 14 are respectively arranged on the side walls adjacent to the first box 6-1 and the second box 6-2, the central axis of the first positioning hole 13 coincides with the central axis of the second positioning hole 14, and the diameter of the first positioning hole 13 is consistent with the diameter of the second positioning hole 14, the first positioning hole 13 passes through the side wall of the first box 6-1, and a screw hole 15 is arranged on the side wall of the second box 6-2 at the end of the second positioning hole 14 away from the first box 6-1, the screw hole 15 coincides with the central axis of the second positioning hole 14, and the inner diameter of the screw hole 15 is smaller than the inner diameter of the second positioning hole 14; an elastic pin 2 is arranged in the first positioning hole 13 and the second positioning hole 14, and a bolt 1 is passed through the elastic pin 2 and the screw hole 15; the outer diameter of the elastic pin 2 in the natural state is greater than or equal to the diameter of the first positioning hole 13, and the minimum outer diameter of the elastic pin 2 in the compressed state is less than or equal to the diameter of the first positioning hole 13. Of course, under normal circumstances, the diameter of the first positioning hole 13 is smaller than the outer diameter of the elastic pin 2 in the natural state, and larger than the minimum outer diameter of the elastic pin 2 in the compressed state.

[0029] The bolt 1 includes a rod body 4 with an external thread and a bolt head 3 located at the end of the rod body 4. The elastic pin 2 is sleeved on the rod body 4. The diameter of the bolt head 3 is larger than the inner diameter of the elastic pin 2 in the natural state. The outer diameter of the rod body 4 is smaller than the minimum inner diameter of the elastic pin 2 in the compressed state. The elastic pin 2 is an elastic cylindrical structure with an opening 5 set at one of the circumferential side walls. The opening 5 penetrates the side wall thickness of the cylindrical structure, and the opening 5 penetrates the side wall of the cylindrical structure along the axial direction.

[0030] The above-mentioned form adopts the cooperation of the bolt 1 and the elastic pin 2, has a simple structure and low use cost.

[0031] In actual use, the two display screen boxes 6 are butted, and the first positioning hole 13 and the second positioning hole 14 are butted. The elastic pin 2 is sleeved on the rod body 4 of the bolt 1, and then inserted into the first positioning hole 13 and the second positioning hole 14. The external thread of the rod body 4 of the bolt 1 cooperates with the screw hole 15, and the bolt head 3 is turned. In the process of screwing the bolt 1 into the screw hole 15, since the end of the elastic pin 2 abuts against the bolt head 3, the elastic pin 2 is pressed into the first positioning hole 13 and the second positioning hole 14 until the bolt head 3 fits the side wall of the first box 6-1, and the elastic pin 2 is distributed in the first positioning hole 13 of the first box 6-1 and the second positioning hole 14 of the second box 6-2. At this time, the elastic pin 2 is used for positioning, and the bolt 1 is used for connection. This form is simple to assemble, low in cost, and has a good positioning effect. Because the elastic pin 2 is used for positioning, even if there is an error in the two positioning holes, the elastic pin 2 can automatically adapt.

[0032] In order to facilitate the disassembly of the connection and positioning device, the total length of the two positioning holes needs to be designed to be greater than the length of the elastic pin 2, so that the elastic pin 2 can be pulled out of the positioning hole by a corresponding tool. The above tool can be in the form of a small puller, and the specific form of the tool is not limited here.

[0033] Embodiment 2:

[0034] like Figure 4-11 As shown, the utility model discloses a spliced ​​display screen box, such as Figure 1 As shown, it includes a plurality of boxes 6, two adjacent boxes 6 are respectively a first box 6-1 and a second box 6-2, and a first positioning hole 13 and a second positioning hole 14 are respectively arranged on the side walls adjacent to the first box 6-1 and the second box 6-2, the central axis of the first positioning hole 13 coincides with the central axis of the second positioning hole 14, and the diameter of the first positioning hole 13 is consistent with the diameter of the second positioning hole 14, the first positioning hole 13 passes through the side wall of the first box 6-1, and a screw hole 15 is arranged on the side wall of the second box 6-2 at the end of the second positioning hole 14 away from the first box 6-1, the screw hole 15 coincides with the central axis of the second positioning hole 14, and the inner diameter of the screw hole 15 is smaller than the inner diameter of the second positioning hole 14; an elastic pin 2 is arranged in the first positioning hole 13 and the second positioning hole 14, and a bolt 1 is passed through the elastic pin 2 and the screw hole 15; the outer diameter of the elastic pin 2 in the natural state is greater than or equal to the diameter of the first positioning hole 13, and the minimum outer diameter of the elastic pin 2 in the compressed state is less than or equal to the diameter of the first positioning hole 13. Of course, under normal circumstances, the diameter of the first positioning hole 13 is smaller than the outer diameter of the elastic pin 2 in the natural state, and larger than the minimum outer diameter of the elastic pin 2 in the compressed state.

[0035] The bolt 1 includes a rod body 4 with an external thread and a bolt head 3 located at the end of the rod body 4. The elastic pin 2 is sleeved on the rod body 4. The diameter of the bolt head 3 is larger than the inner diameter of the elastic pin 2 in the natural state. The outer diameter of the rod body 4 is smaller than the minimum inner diameter of the elastic pin 2 in the compressed state. The elastic pin 2 is an elastic cylindrical structure with an opening 5 set at one of the circumferential side walls. The opening 5 penetrates the side wall thickness of the cylindrical structure, and the opening 5 penetrates the side wall of the cylindrical structure along the axial direction.

[0036] The rod body 4 of the bolt 1 at one end close to the bolt head 3 is a smooth rod 10, and the rod body 4 of the bolt 1 at one end away from the bolt head 3 is a screw rod 11, and the smooth rod 10 and the screw rod 11 are an integral structure; a step 9 is formed at the junction of the screw rod 11 and the smooth rod 10, the outer diameter of the smooth rod 10 is smaller than the outer diameter of the screw rod 11, the outer diameter of the smooth rod 10 is smaller than the minimum inner diameter of the elastic pin 2 in the compressed state, the outer diameter of the step 9 is larger than the inner diameter of the elastic pin 2 in the natural state, and the outer diameter of the step 9 is smaller than the diameter of the first positioning hole 13 on the box body 6.

[0037] A compression spring 7 is sleeved on the outside of the elastic pin 2 . The inner diameter of the compression spring 7 is larger than the outer diameter of the elastic pin 2 in a natural state, and the inner diameter of the compression spring 7 is smaller than the outer diameter of the bolt head 3 .

[0038] A limiting ring 8 is sleeved on the polished rod 10 between the bolt head 3 and the compression spring 7 . The inner diameter of the limiting ring 8 is smaller than the outer diameter of the bolt head 3 , and the outer diameter of the limiting ring 8 is larger than the inner diameter of the compression spring 7 .

[0039] The rod body 4 of the bolt 1 is processed into a polished rod 10 at one end close to the bolt head 3, and a step 9 is formed at the connection between the polished rod 10 and the screw rod 11. The outer diameter of the step 9 is larger than the inner diameter of the elastic pin 2 in the natural state. Of course, when the elastic pin 2 is assembled into the polished rod 10, it can be expanded to a certain extent by external force to ensure that it passes through the step 9.

[0040] During assembly, the screw rod 11 of the bolt 1 is connected to the screw hole, the elastic pin 2 is pressed into the corresponding positioning hole, and the compression spring 7 is compressed at the same time, so that it is very convenient to complete the assembly of the positioning pin and the bolt 1, and realize the positioning and connection of adjacent display screens.

[0041] During disassembly, it is only necessary to twist the bolt head 3 to withdraw the screw rod 11 from the screw hole, release the elastic force of the compression spring 7, and push the bolt 1 out of the positioning hole. During this process, since the step 9 can block the elastic pin 2, when the bolt 1 is pushed out of the positioning hole, the elastic pin 2 is also brought out of the positioning hole. The elastic pin 2 can be disassembled without using additional tools, which is extremely convenient. In addition, during disassembly, even if there is no other connecting force between two adjacent display screen boxes 6, when the screw rod 11 is withdrawn from the screw hole, the pressure release of the compression spring 7 can also keep the two display screen boxes 6 in a fitted state until the screw rod 11 is completely withdrawn from the screw hole. Therefore, it is only necessary to make the screw rod 11 long enough and the elastic force of the compression spring 7 large enough to take the elastic pin 2 out of the positioning hole when the screw rod 11 is withdrawn. It is suitable for splicing and disassembling between display screen boxes 6 under any circumstances.

[0042] Embodiment 3:

[0043] like Figure 12-14 As shown, the utility model discloses a spliced ​​display screen box, such as Figure 1As shown, it includes a plurality of boxes 6, two adjacent boxes 6 are respectively a first box 6-1 and a second box 6-2, and a first positioning hole 13 and a second positioning hole 14 are respectively arranged on the side walls adjacent to the first box 6-1 and the second box 6-2, the central axis of the first positioning hole 13 coincides with the central axis of the second positioning hole 14, and the diameter of the first positioning hole 13 is consistent with the diameter of the second positioning hole 14, the first positioning hole 13 passes through the side wall of the first box 6-1, and a screw hole 15 is arranged on the side wall of the second box 6-2 at the end of the second positioning hole 14 away from the first box 6-1, the screw hole 15 coincides with the central axis of the second positioning hole 14, and the inner diameter of the screw hole 15 is smaller than the inner diameter of the second positioning hole 14; an elastic pin 2 is arranged in the first positioning hole 13 and the second positioning hole 14, and a bolt 1 is passed through the elastic pin 2 and the screw hole 15; the outer diameter of the elastic pin 2 in the natural state is greater than or equal to the diameter of the first positioning hole 13, and the minimum outer diameter of the elastic pin 2 in the compressed state is less than or equal to the diameter of the first positioning hole 13. Of course, under normal circumstances, the diameter of the first positioning hole 13 is smaller than the outer diameter of the elastic pin 2 in the natural state, and larger than the minimum outer diameter of the elastic pin 2 in the compressed state.

[0044] The bolt 1 includes a rod body 4 with an external thread and a bolt head 3 located at the end of the rod body 4. The elastic pin 2 is sleeved on the rod body 4. The diameter of the bolt head 3 is larger than the inner diameter of the elastic pin 2 in the natural state. The outer diameter of the rod body 4 is smaller than the minimum inner diameter of the elastic pin 2 in the compressed state. The elastic pin 2 is an elastic cylindrical structure with an opening 5 set at one of the circumferential side walls. The opening 5 penetrates the side wall thickness of the cylindrical structure, and the opening 5 penetrates the side wall of the cylindrical structure along the axial direction.

[0045] The rod body 4 of the bolt 1 at one end close to the bolt head 3 is a smooth rod 10, and the rod body 4 of the bolt 1 at one end away from the bolt head 3 is a screw rod 11, and the smooth rod 10 and the screw rod 11 are an integral structure; a step 9 is formed at the junction of the screw rod 11 and the smooth rod 10, the outer diameter of the smooth rod 10 is smaller than the outer diameter of the screw rod 11, the outer diameter of the smooth rod 10 is smaller than the minimum inner diameter of the elastic pin 2 in the compressed state, the outer diameter of the step 9 is larger than the inner diameter of the elastic pin 2 in the natural state, and the outer diameter of the step 9 is smaller than the diameter of the first positioning hole 13 on the first box body 6-1.

[0046] A retaining ring 12 is sleeved on the polished rod 10, and the elastic pin 2 is sleeved on the polished rod 10 between the retaining ring 12 and the bolt head 3. The outer diameter of the step 9 is smaller than the outer diameter of the retaining ring 12, and the outer diameter of the retaining ring 12 is larger than the inner diameter of the elastic pin 2 in the natural state.

[0047] Compared with the spliced ​​display screen box of Example 2, the spliced ​​display screen box of this embodiment does not use the compression spring 7, so its cost is lower. In actual use, the assembly effect is the same as the device effect of Example 2. However, its scope of application is: it is mainly applicable to the case where there is an additional connection force between two adjacent display screen boxes 6. Since there is a certain extrusion friction between the elastic pin 2 and the positioning hole, if the screw rod 11 of the bolt 1 is directly withdrawn from the screw hole when there is no connection force between the two adjacent display screen boxes 6, the two display screen boxes 6 can only be separated at this time, and the elastic pin 2 cannot be pushed out of the positioning hole. Therefore, the solution of this embodiment is applicable to the case where there is a connection force between the display screen boxes 6, and it is also convenient for disassembly. Of course, the connection force between the display screen boxes 6 can be additionally applied during disassembly.

[0048] The assembly and disassembly process of the positioning connection between the display screen boxes 6 in this embodiment is the same as that of the second embodiment.

[0049] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0050] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be an interactive relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0052] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simplified modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A spliced ​​display screen box, comprising a plurality of boxes, wherein two adjacent boxes are respectively a first box and a second box, wherein: A first positioning hole and a second positioning hole are respectively provided on the side walls adjacent to the first box body and the second box body, the central axes of the first positioning hole and the second positioning hole coincide with each other, and the diameter of the first positioning hole is consistent with the diameter of the second positioning hole, the first positioning hole passes through the side wall of the first box body, and a screw hole is provided on the side wall of the second box body at the end of the second positioning hole away from the side of the first box body, the screw hole coincides with the central axis of the second positioning hole, and the inner diameter of the screw hole is smaller than the inner diameter of the second positioning hole; elastic pins are provided in the first positioning hole and the second positioning hole, and bolts are passed through the elastic pin and the screw hole; the outer diameter of the elastic pin in a natural state is greater than or equal to the diameter of the first positioning hole, and the minimum outer diameter of the elastic pin in a compressed state is less than or equal to the diameter of the first positioning hole.

2. The spliced ​​display screen box according to claim 1 is characterized in that: The bolt includes a rod body with an external thread and a bolt head located at the end of the rod body, the elastic pin is sleeved on the rod body, the diameter of the bolt head is larger than the diameter of the first positioning hole, the diameter of the bolt head is larger than the inner diameter of the elastic pin in a natural state, the outer diameter of the rod body is smaller than the minimum inner diameter of the elastic pin in a compressed state, and the elastic pin is an elastic cylindrical structure with an opening set at one of the circumferential side walls, the opening penetrates the side wall thickness of the cylindrical structure, and the opening penetrates the side wall of the cylindrical structure along the axial direction.

3. The spliced ​​display screen box according to claim 2 is characterized in that: The rod body of the bolt near the bolt head is a smooth rod, and the rod body of the bolt away from the bolt head is a screw rod, and the smooth rod and the screw rod are an integral structure; a step is formed at the junction of the screw rod and the smooth rod, the outer diameter of the smooth rod is smaller than the outer diameter of the screw rod, the outer diameter of the smooth rod is smaller than the minimum inner diameter of the elastic pin in the compressed state, the outer diameter of the step is larger than the inner diameter of the elastic pin in the natural state, and the outer diameter of the step is smaller than the diameter of the first positioning hole.

4. A spliced ​​display screen box according to claim 3, characterized in that: A retaining ring is sleeved on the polished rod, and the elastic pin is sleeved on the polished rod between the retaining ring and the bolt head. The outer diameter of the step is smaller than the outer diameter of the retaining ring, the outer diameter of the retaining ring is larger than the inner diameter of the elastic pin in the natural state, and the outer diameter of the retaining ring is smaller than the minimum outer diameter of the elastic pin in the compressed state.

5. A spliced ​​display screen box according to claim 3 or 4, characterized in that: A compression spring is sleeved on the outside of the elastic pin, the inner diameter of the compression spring is larger than the outer diameter of the elastic pin in a natural state, and the inner diameter of the compression spring is smaller than the outer diameter of the bolt head.

6. The spliced ​​display screen box according to claim 5 is characterized in that: A limiting ring is sleeved on the polished rod between the bolt head and the compression spring. The inner diameter of the limiting ring is smaller than the outer diameter of the bolt head, and the outer diameter of the limiting ring is larger than the inner diameter of the compression spring.

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