CN219372772U - Box body connecting fitting and display screen box body assembly - Google Patents

Abstract

The utility model relates to a display screen box fitting, which is used for connecting two adjacent boxes, wherein the box connecting fitting comprises a first connecting component and a second connecting component; the first connecting piece comprises a first fixing piece and a first connecting piece which is connected with the first fixing piece in a sliding way, and a connecting groove is formed in one end of the first connecting piece; the second connecting assembly comprises a second fixing piece and a second connecting piece which is in sliding connection with the second fixing piece, the second connecting piece comprises a rotating connecting part positioned at one end, and the rotating connecting part is rotationally connected with the first connecting piece through being embedded into the connecting groove. Among the above-mentioned box connection fittings, the one end of first connecting piece has the spread groove, and the first rotation connecting portion that has with spread groove looks adaptation of second connecting piece can consolidate the connection of adjacent box through the cooperation connection of first connecting piece and second connecting piece, avoids producing the dislocation between two adjacent boxes, and this simple structure, low in production cost has higher economic nature.

Description

Box body connecting fitting and display screen box body assembly

Technical Field

The utility model relates to the technical field of LED display screen assembly, in particular to a box connecting fitting and a display screen box assembly.

Background

With the high-speed development of the LED display screen industry, arc-shaped LED display screen products are increasingly popular in our lives, and particularly, the arc-shaped LED display screen products are widely applied to stages and virtual shooting.

At present, the assembly of a large-scale arc-shaped LED display screen is generally realized by the following two modes: firstly, the assembly is carried out by adopting a conventional box body and angle blocks, the assembly mode has higher precision but high cost, and time and labor are wasted when the angle of the box body is adjusted, so that the quick assembly and disassembly scenes can not be met; secondly, adopt the arc lock to assemble, but the display screen box size is great generally, if the quantity of arc lock that adopts is less, can lead to the span between the arc lock great, and the weight of display screen box is great, therefore the display screen box produces bending deformation easily. For example, in the case where only two arc locks are provided, the display screen case will typically bend to a greater extent at the midpoint of the line connecting the two arc locks. When the bending amplitude of two adjacent display screen boxes is different, front-back dislocation can be generated between the adjacent LED screen boxes, so that the display effect of the display screen is greatly affected. Although the problem of dislocation of the screen body can be solved by adding the arc-shaped lock, the arc-shaped lock has higher production or purchase cost and poorer economy.

Disclosure of Invention

Based on the problems, that the existing arc-shaped LED display screen cannot simultaneously generate screen body dislocation and high equipment cost when being assembled, the box body connecting fitting and the display screen box body assembly are provided.

A box connection fitting for connecting two adjacent boxes, the box connection fitting comprising:

the first connecting assembly comprises a first fixing piece and a first connecting piece which is connected with the first fixing piece in a sliding manner, and a connecting groove is formed in one end of the first connecting piece;

the second connecting assembly comprises a second fixing piece and a second connecting piece which is in sliding connection with the second fixing piece, the second connecting piece comprises a rotating connecting part positioned at one end, and the rotating connecting part is rotationally connected with the first connecting piece by being embedded into the connecting groove.

In one embodiment, the rotation connection portion is a universal ball, and the universal ball is adapted to the connection groove.

In one embodiment, a first chute is arranged in the first fixing piece, one end of the first chute is provided with a first opening, and the first connecting piece is arranged in the first chute in a sliding manner;

one end of the first sliding groove, which is far away from the first opening, is provided with a first elastic piece, and one end of the first connecting piece, which is far away from the connecting groove, is connected with the first elastic piece.

In one embodiment, a first limiting groove is formed in the side wall of the first connecting piece, the first limiting groove extends along the length direction parallel to the first sliding groove, a first limiting piece is connected to the first fixing piece, and one end of the first limiting piece is located in the first limiting groove to limit the sliding stroke of the first limiting piece.

In one embodiment, a second chute is arranged in the second fixing piece, one end of the second chute is provided with a second opening, and the second connecting piece is arranged in the second chute in a sliding manner;

one end of the second sliding groove, which is far away from the second opening, is provided with a second elastic piece, and one end of the second connecting piece, which is far away from the second opening, is connected with the second elastic piece.

In one embodiment, a second limiting groove is formed in the side wall of the second connecting piece, the second limiting groove extends along a length direction parallel to the second sliding groove, a second limiting piece is connected to the second fixing piece, and one end of the second limiting piece is located in the second limiting groove to limit the sliding stroke of the second limiting piece.

In one embodiment, the second fixing member is provided with a yielding groove, and the second connecting member is connected with a handle portion, and the handle portion is arranged in the yielding groove in a penetrating manner.

In one embodiment, a positioning groove is formed in one side of the yielding groove, the positioning groove is communicated with the yielding groove, and the positioning groove is used for accommodating the handle portion.

In one embodiment, the relative rotation angle between the first and second connection members is in the range of 0 ° -10 °.

A display screen box assembly comprising at least two mutually spliced boxes, at least one box connection fitting as defined in any one of the above being provided between two adjacent boxes.

In the above-mentioned box connection accessory, the one end of first connecting piece has the spread groove, the first rotation connecting portion that has with spread groove looks adaptation of second connecting piece, thereby after two adjacent boxes pass through the arc lock and connect, can make the rotation connecting portion embedding of second connecting piece in the spread groove of first connecting piece, thereby realized consolidating the connection of adjacent box, avoid producing the dislocation between two adjacent boxes, and this simple structure, manufacturing cost is lower, avoided producing the dislocation between two adjacent boxes and adopted more arc locks and lead to reducing the economic nature of product.

Drawings

FIG. 1 is a schematic diagram of a box connection fitting and a frame assembly of a box according to an embodiment of the present utility model;

FIG. 2 is a schematic structural view of a box connection fitting according to an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of a tank connection fitting according to an embodiment of the present utility model;

FIG. 4 is a schematic structural view of a second connecting member according to an embodiment of the present utility model;

FIG. 5 is a schematic structural view of a first connecting member according to an embodiment of the present utility model;

reference numerals illustrate:

10. the box body is connected with the fittings; 100. a first connection assembly; 110. a first fixing member; 111. a first chute; 112. a first opening; 113. a first inclined surface; 120. a first connector; 121. a connecting groove; 122. a first limit groove; 130. a first elastic member; 140. a first limiting member; 200. a second connection assembly; 210. a second fixing member; 211. a second chute; 212. a second opening; 213. a second inclined surface; 214. a relief groove; 215. a positioning groove; 220. a second connector; 221. a slide bar; 222. a rotary connection part; 223. the second limit groove; 224. a notch; 225. a handle portion; 230. a second elastic member; 240. a second limiting piece; 300. a frame; 400. an arc lock.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1, an embodiment of the present utility model provides a display screen case assembly, which is formed by splicing at least two cases, wherein the case includes a mounting frame and an LED panel disposed at one side of the mounting frame, and a plurality of cases are spliced to form the display screen case assembly having a large-sized LED panel. The display screen box body assembly comprises a plurality of arc locks 400 for connecting two adjacent box bodies, wherein the arc locks 400 are common devices on the display screen box body assembly, and the structure of the arc locks 400 is not repeated in the embodiment. For example, the number of the arc locks 400 is two, the two arc locks 400 are arranged at the joint of the two boxes at intervals, and one of the two arc locks 400 is close to the upper end of the box, and the other is close to the lower end of the box, so that the left box and the right box are firmly connected through the two arc locks 400. The display screen box assembly further comprises a box connecting fitting 10, wherein the box connecting fitting 10 is connected between two adjacent boxes, and when two arc locks 400 are connected between the two adjacent boxes, the box connecting fitting 10 is positioned between the two arc locks 400 so as to further connect and reinforce the two adjacent boxes. For example, the tank connector fitting 10 is located at the midpoint of the line connecting the two arcuate locks 400.

Specifically, as shown in fig. 1 to 3, the case connecting fitting 10 includes a first connecting member 100 and a second connecting member 200, the first connecting member 100 is disposed on one of two adjacent cases, and the second connecting member 200 is disposed on the other case. The first connecting assembly 100 includes a first fixing member 110 and a first connecting member 120, the first fixing member 110 is fixedly connected to the frame 300 of one of the boxes, and the first connecting member 120 is slidably connected to the first fixing member 110. The second connecting assembly 200 includes a second fixing member 210 and a second connecting member 220 slidably connected to the second fixing member 210, where the second fixing member 210 is fixedly connected to the frame 300 of the other case, and when the display case assembly is in an assembled state, the second fixing member 210 is disposed opposite to the first fixing member 110. As shown in fig. 5, an end of the first connecting member 120 adjacent to the second connecting member 220 is provided with a connecting groove 121. As shown in fig. 3 and 4, the second link 220 includes a rotational link 222 at one end, and the rotational link 222 is rotatably coupled with the first link 120 by being inserted into the link groove 121.

It will be appreciated that after two adjacent cases are fixedly connected by two arc locks 400, the case is easy to bend and deform, especially at the midpoint of the line connecting the two arc locks 400, because the case is generally large in size, the span of the two arc locks 400 disposed up and down is also large, and the weight of the case is large. When the bending amplitude of two adjacent boxes is different, front-back dislocation can be generated between the adjacent LED screen bodies, so that the display effect of the display screen box assembly is greatly affected. In this embodiment, the case connecting fitting 10 is disposed between the two arc locks 400, so that two adjacent cases can be reinforced in the middle of the display screen case assembly. After two adjacent cases are connected through the arc lock 400, the second connecting member 220 may be slid until the end of the second connecting member 220 is inserted into the connecting groove 121 of the first connecting member 120, thereby realizing reinforcement of connection of the adjacent cases and avoiding dislocation between the two adjacent cases.

It should be noted that, since the second connector 220 is rotatably connected to the first connector 120 after the second connector 220 is inserted into the connecting groove 121, even when two adjacent cases are spliced into an LED panel having an arc shape by relative rotation, the first connector 120 and the second connector 220 can be kept connected by relative rotation, i.e., the first connector 120 and the second connector 220 automatically follow rotation when the two cases are operated to rotate relative to each other, and the connection between the first connector 120 and the second connector 220 does not interfere with the rotation between the cases.

In one embodiment, as shown in fig. 3 and 4, the second connecting piece 220 further includes a sliding rod 221, one end of the sliding rod 221 is connected to a rotating connecting portion 222, and the rotating connecting portion 222 is a universal ball head, and the universal ball head is adapted to the connecting groove 121. The second connecting piece 220 can rotate relatively to the first connecting piece 120 in any direction by matching the universal ball head with the connecting groove 121.

Optionally, the relative rotation angle between the first connector 120 and the second connector 220 ranges from 0 ° to 10 °, so as to meet the rotation amplitude requirement between two adjacent cases. Wherein the range of the relative rotation angle between the first link 120 and the second link 220 is 0 ° -10 °, which means that the first link 120 can rotate 10 ° in any direction with respect to the second link 220. Of course, since the rotation between the cases is only performed in two directions, that is, the adjacent two cases are rotated in opposite directions by a certain angle to make the spliced LED screen concave or rotated in opposite directions to make the spliced LED screen convex, the first connecting member 120 is also rotated in opposite directions with respect to the second connecting member 220 during use. It should be noted that, the relative rotation angle range between the first connecting member 120 and the second connecting member 220 can be adjusted according to the angle rotation range of the adjacent boxes, and only the automatic rotation between the first connecting member 120 and the second connecting member 220 can be ensured when the angle between the two adjacent boxes is adjusted, so that the rotation of the boxes is not interfered.

In one embodiment, as shown in fig. 2, in the connected state of the two adjacent cases, a first inclined surface 113 is disposed on a side of the first fixing member 110 facing the second fixing member 210, a second inclined surface 213 is disposed on a side of the second fixing member 210 facing the first fixing member 110, the first inclined surface 113 is disposed obliquely from an end close to the frame 300 to a direction away from the frame 300 and away from the second fixing member 210, and the second inclined surface 213 is disposed obliquely from an end close to the frame 300 to a direction away from the frame 300 and away from the first fixing member 110. When the included angle between two adjacent boxes is zero degrees, the first inclined surface 113 and the second inclined surface 213 are arranged in a V shape. The first opening 112 is located on the first inclined surface 113, and the second opening 212 is located on the second inclined surface 213. By providing the first inclined surface 113 and the second inclined surface 213, when the adjacent box body needs to rotate outwards by a certain angle relatively to make the spliced LED screen take the shape of an outer convex arc, the first fixing piece 110 and the second fixing piece 210 cannot interfere with the rotation of the box body.

In one embodiment, as shown in fig. 3, a first chute 111 is disposed in the first fixing member 110, one end of the first chute 111 away from the second fixing member 210 is closed, and one end of the first chute near the second fixing member 210 is provided with a first opening 112. The first connecting piece 120 is slidably disposed in the first sliding groove 111, and an end of the first connecting piece 120 having the connecting groove 121 may extend out of the first opening 112 from the first sliding groove 111 or retract into the first sliding groove 111 from the first opening 112. The first sliding groove 111 is provided with a first elastic member 130 at an end far away from the first opening 112, and the first connecting member 120 is connected with the first elastic member 130 at an end far away from the connecting groove 121. For example, the first elastic member 130 is a spring. The connection between the first connecting member 120 and the first elastic member 130 may be a contact connection or a fixed connection, which is not limited in this embodiment.

It can be appreciated that by disposing the first elastic member 130 in the first sliding groove 111, when the first elastic member 130 is in a compressed state, the first elastic member 130 can apply a certain force to the first connecting member 120, so that the first connecting member 120 has a tendency to move in the direction of the corresponding second connecting member 220, and the embedding of the rotating connecting portion 222 in the connecting groove 121 is more stable.

Optionally, as shown in fig. 3 and 5, a first limiting groove 122 is provided on a side wall of the first connecting piece 120, and the first limiting groove 122 extends along a length direction parallel to the first sliding groove 111; the first fixing member 110 is connected with a first limiting member 140, and one end of the first limiting member 140 is located in the first limiting groove 122 to limit the sliding stroke of the first limiting member 140. For example, the first limiting member 140 is a limiting bolt, the limiting bolt is perpendicular to the first connecting member 120, the first limiting groove 122 is disposed towards one end of the limiting bolt, and one end of the limiting bolt is located in the first sliding groove 111 and extends into the first limiting groove 122 to limit the sliding stroke of the first limiting member 140.

It can be appreciated that when two cases are assembled or two adjacent cases are disassembled by the arc lock 400, the first connecting member 120 has a tendency to extend out of the first opening 112 under the elastic supporting force of the first elastic member 130, but after the lower end of the first limiting member 140 abuts against the inner wall of the end of the first limiting groove 122, which is close to the first elastic member 130, the first connecting member 120 cannot move continuously, so that the length of the first connecting member 120 extending out of the first opening 112 is controlled within a certain range, and interference during the assembling or disassembling operation of the cases is avoided. In addition, when the first elastic member 130 and the first connecting member 120 are in contact connection, the first limiting member 140 can also prevent the first connecting member 120 from being separated from the first sliding groove 111, which results in loss of components.

In one embodiment, as shown in fig. 3, a second sliding groove 211 is disposed in the second fixing member 210, one end of the second sliding groove 211 away from the first fixing member 110 is closed, and one end of the second sliding groove close to the first fixing member 110 is provided with a second opening 212. The second connecting piece 220 is slidably disposed in the second sliding groove 211, and the rotating connecting portion 222 of the second connecting piece 220 may extend from the second sliding groove 211 out of the second opening 212 or retract from the second opening 212 into the second sliding groove 211. The second elastic member 230 is disposed at an end of the second sliding groove 211 away from the second opening 212, and an end of the second connecting member 220 away from the second opening 212 is connected to the second elastic member 230. For example, the second elastic member 230 is a spring. The connection between the second connecting member 220 and the second elastic member 230 may be a contact connection or a fixed connection, which is not limited in this embodiment.

It can be appreciated that, by disposing the second elastic member 230 in the second sliding groove 211, when the second elastic member 230 is in a compressed state, the second elastic member 230 can apply a certain force to the second connecting member 220, so that the second connecting member 220 has a tendency to move in the direction of the corresponding first connecting member 120, and the embedding of the rotating connecting portion 222 in the connecting groove 121 is more stable.

In addition, since the case has a certain thickness, the connection portion of the first and second connection members 120 and 220 is not generally located on the rotation axes of the two cases, and thus when the adjacent two cases are relatively rotated to achieve the splicing of the LED panels having the arc, the first and/or second connection members 120 and 220 are displaced with respect to the case, and by slidably disposing the first connection member 120 in the first sliding slot 111 and the second connection member 220 in the second sliding slot 211, the first and/or second connection members 120 and 220 are prevented from interfering with the relative rotation between the cases, i.e., when the adjacent two cases are relatively rotated, the first connection member 120 slides in the first sliding slot 111, the second connection member 220 slides in the second sliding slot 211, and simultaneously the relative rotation of the first connection member 120 with respect to the second connection member 220 is completed, and the rotational connection of the first and second connection members 120 and 220 is maintained under the action of the first and second elastic members 130 and 230.

Optionally, as shown in fig. 3 and 4, a second limiting groove 223 is provided on a sidewall of the second connecting piece 220, and the second limiting groove 223 extends along a length direction parallel to the second sliding groove 211; the second fixing member 210 is connected with a second limiting member 240, and one end of the second limiting member 240 is located in the second limiting groove 223 to limit the sliding stroke of the second limiting member 240. For example, the second limiting member 240 is a limiting bolt, the limiting bolt is perpendicular to the second connecting member 220, the second limiting groove 223 is disposed towards one end of the limiting bolt, and one end of the limiting bolt is located in the second sliding groove 211 and extends into the second limiting groove 223 to limit the sliding stroke of the second limiting member 240.

It can be appreciated that when two cases are assembled or two adjacent cases are disassembled by the arc lock 400, the second connecting member 220 has a tendency to extend out of the second opening 212 under the elastic supporting force of the first elastic member 130, but after the lower end of the second limiting member 240 abuts against the inner wall of the end of the second limiting groove 223, which is close to the second elastic member 230, the second connecting member 220 cannot move continuously, so that the length of the second connecting member 220 extending out of the second opening 212 is controlled within a certain range, and interference during the assembling or disassembling operation of the cases is avoided. In addition, when the second elastic member 230 and the second connecting member 220 are in contact connection, the second limiting member 240 can also prevent the second connecting member 220 from being separated from the second sliding slot 211, thereby preventing the loss of components.

In addition, when the second connecting member 220 is in the connecting state with the first connecting member 120, by the cooperation of the first limiting member 140 and the first sliding groove 111 and the cooperation of the second limiting member 240 and the second limiting groove 223, it is also possible to avoid that the end portion of the second connecting member 220 enters the first sliding groove 111 due to the transitional extrusion of the first connecting member 220 by the second connecting member 220 or that the end portion of the first connecting member 120 enters the second sliding groove 211 due to the transitional extrusion of the first connecting member 120 by the first connecting member 120, and the relative rotation of the box body is interfered no matter whether the first connecting member 120 is inserted into the second sliding groove 211 or the second connecting member 220 is inserted into the first sliding groove 111.

In one embodiment, as shown in fig. 2, the second fixing member 210 is provided with a yielding groove 214, and a length direction of the yielding groove 214 is parallel to a length direction of the second sliding groove 211. For example, relief groove 214 is a kidney-shaped aperture. The second connecting piece 220 is connected with a handle portion 225, and the handle portion 225 is arranged in the yielding groove 214 in a penetrating manner. By holding the handle 225 and pulling the handle 225 along the direction of the yielding groove 214, the second connecting member 220 can be driven to move in the second sliding groove 211. It can be appreciated that when two boxes are assembled or two adjacent boxes are disassembled by the arc lock 400, in order to avoid interference between the rotating connection portion 222 at one end of the second connecting member 220 and the assembly or disassembly of the boxes, the handle portion 225 may be pulled to drive the second connecting member 220 to integrally retract into the second sliding slot 211, so as to avoid the exposing of the rotating connection portion 222 and the interference between the assembly or disassembly of the boxes.

Further, as shown in fig. 2, a positioning groove 215 is provided on one side of the relief groove 214, the positioning groove 215 is in communication with the relief groove 214, and the positioning groove 215 is used for accommodating the handle portion 225. When the rotating connection portion 222 needs to be retracted into the second sliding groove 211, the handle portion 225 can be held by hand to be pulled into the second sliding groove 211, but after the pulling force exerted by the hand is removed, the second elastic member 230 has a certain elastic supporting force on the second connection member 220, so that the second connection member 220 cannot be kept completely retracted into the second sliding groove 211, and therefore, the handle portion 225 can be rotated by a certain angle, so that the handle portion 225 is clamped in the positioning groove 215, and the second connection member 220 is positioned in the second sliding groove 211 and cannot move towards the second opening 212.

Further, since the second connector 220 also rotates synchronously during the process of sliding the handle portion 225 from the yielding groove 214 into the positioning groove 215, the end portion of the second stopper 240 is embedded in the second stopper groove 223 of the second connector 220. Therefore, as shown in fig. 4, in order to avoid the interference of the second limiting member 240 on the rotation of the handle portion 225, a notch 224 is formed on one side of the second limiting groove 223, the notch 224 is in communication with the second limiting groove 223, and the notch 224 is located on a side of the second limiting groove 223 facing away from the positioning groove 215. When the handle 225 is held by hand and the handle 225 is rotated from the yielding groove 214 to the positioning groove 215, the second connecting member 220 is also rotated synchronously until the end of the second limiting member 240 is inserted into the notch 224.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A box connection fitting for connecting two adjacent boxes, the box connection fitting comprising:

the first connecting assembly comprises a first fixing piece and a first connecting piece which is connected with the first fixing piece in a sliding manner, and a connecting groove is formed in one end of the first connecting piece;

the second connecting assembly comprises a second fixing piece and a second connecting piece which is in sliding connection with the second fixing piece, the second connecting piece comprises a rotating connecting part positioned at one end, and the rotating connecting part is rotationally connected with the first connecting piece by being embedded into the connecting groove.

2. The case connection fitting according to claim 1, wherein the rotational connection portion is a universal ball, the universal ball being adapted to the connection groove.

3. The case connection fitting according to claim 1, wherein a first chute is provided in the first fixing member, one end of the first chute has a first opening, and the first connecting member is slidably disposed in the first chute;

one end of the first sliding groove, which is far away from the first opening, is provided with a first elastic piece, and one end of the first connecting piece, which is far away from the connecting groove, is connected with the first elastic piece.

4. The case connecting fitting according to claim 3, wherein a first limit groove is provided on a side wall of the first connecting member, the first limit groove extends in a length direction parallel to the first slide groove, a first limit member is connected to the first fixing member, and one end of the first limit member is located in the first limit groove to limit a sliding stroke of the first limit member.

5. The case connection fitting according to claim 1, wherein a second chute is provided in the second fixing member, one end of the second chute has a second opening, and the second connecting member is slidably disposed in the second chute;

one end of the second sliding groove, which is far away from the second opening, is provided with a second elastic piece, and one end of the second connecting piece, which is far away from the second opening, is connected with the second elastic piece.

6. The case connecting fitting according to claim 5, wherein a second limiting groove is provided on a side wall of the second connecting member, the second limiting groove extends in a direction parallel to a length direction of the second sliding groove, a second limiting member is connected to the second fixing member, and one end of the second limiting member is located in the second limiting groove to limit a sliding stroke of the second limiting member.

7. The case connection fitting according to claim 5, wherein a relief groove is provided in the second fixing member, a handle portion is connected to the second connecting member, and the handle portion is inserted into the relief groove.

8. The case connection fitting according to claim 7, wherein one side of the relief groove is provided with a positioning groove, the positioning groove being in communication with the relief groove, the positioning groove being for accommodating the handle portion.

9. The tank attachment fitting of any of claims 1-8, wherein the relative angle of rotation between the first connector and the second connector is in the range of 0 ° -10 °.

10. A display screen box assembly comprising at least two boxes spliced with each other, at least one box connection fitting according to any one of claims 1-9 being provided between two adjacent boxes.