Connecting device and display screen

Abstract

The utility model relates to a connecting device and a display screen. The connecting device is used for connecting a first frame and a second frame which are oppositely arranged to a truss, and comprises a rotating shaft, and a first mounting piece, a second mounting piece and a third mounting piece which are connected to the rotating shaft; the first mounting part is used for being connected with a first frame, the second mounting part is used for being connected with a second frame, and the third mounting part is used for being connected with a truss; the connecting device has a locking state and an unlocking state; in an unlocking state, the first mounting piece, the second mounting piece and the third mounting piece are configured to be capable of rotating relative to the rotating shaft so as to change included angles among the first frame, the second frame and the truss; in the locked state, the first mounting member, the second mounting member, and the third mounting member are configured to be fixed relative to each other. According to the connecting device and the display screen, the splicing requirement of the curved-surface-shaped display screen can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to display screen technical field especially, is a kind of connecting device and display screen. BACKGROUND

[0002] LED display screen is a kind of new imaging electronic equipment made by light emitting diode in order, because its stable performance, energy saving and environmental protection, high brightness, image gorgeous and long service life etc. LED display screen is usually composed of multiple LED boxes, and the LED box includes a box frame and an LED display module connected to the box frame. Further, the box frame is spliced together by a splicing assembly to form an LED display screen. However, the splicing assembly of the related art cannot meet the scene requirements of angular splicing, i.e. SUMMARY

[0003] Therefore, it is necessary to provide a connecting device and display screen that can meet the splicing requirements of a curved display screen.

[0004] The first aspect of the present application provides a connecting device for connecting a first frame and a second frame arranged opposite to a truss, the connecting device comprising a rotating shaft, a first mounting member, a second mounting member and a third mounting member connected to the rotating shaft.

[0005] The first mounting member is configured to be connected to the first frame, the second mounting member is configured to be connected to the second frame, and the third mounting member is configured to be connected to the truss.

[0006] The connecting device has a locked state and an unlocked state. In the unlocked state, the first mounting member, the second mounting member and the third mounting member are configured to rotate relative to the rotating shaft to change the included angle between the first frame, the second frame and the truss.

[0007] In the locked state, the first mounting member, the second mounting member and the third mounting member are configured to be fixed relative to each other.

[0008] In one embodiment, the first mounting member, the second mounting member and the third mounting member each have a portion overlapping each other in the axial direction of the rotating shaft, and the rotating shaft penetrates through each of the overlapping portions and is configured to abut the overlapping portions against each other in the axial direction of the rotating shaft in the locked state.

[0009] In one of the embodiments, the first mounting member comprises a first engaging portion and a second engaging portion, the second mounting member comprises a first positioning portion and a second positioning portion, the third mounting member comprises a third engaging portion, and the head of the rotating shaft is configured as a locally enlarged diameter portion;

[0010] The tail of the rotating shaft sequentially penetrates the first engaging portion, the third engaging portion, the first positioning portion, the second engaging portion and the second positioning portion in the axial direction of the rotating shaft, and is detachably connected with the second positioning portion, so that the head of the rotating shaft abuts against the first engaging portion.

[0011] In one of the embodiments, a through hole is provided on each of the first engaging portion, the second engaging portion, the third engaging portion, the first positioning portion and the second positioning portion, and the rotating shaft penetrates the through hole;

[0012] The tail of the rotating shaft is threadedly connected with the through hole of the second positioning portion.

[0013] In one of the embodiments, the first mounting member further comprises a first main body, the first engaging portion and the second engaging portion are connected to a first side edge of the first main body, and a first avoiding gap is further provided on the first side edge corresponding to the position of the third engaging portion;

[0014] The second mounting member further comprises a second main body, the first positioning portion and the second positioning portion are connected to a second side edge of the second main body, and a second avoiding gap is further provided on the second side edge corresponding to the position of the third engaging portion.

[0015] In one of the embodiments, the connecting device further comprises an abutting member, the abutting member penetrates from the outer surface of the first engaging portion to the through hole of the first engaging portion, and is used for abutting against the outer circumferential surface of the rotating shaft.

[0016] In one of the embodiments, a locally necked portion is provided on the rotating shaft corresponding to the position of the abutting member.

[0017] In one of the embodiments, the third mounting member further comprises a third main body and a clamp, the third engaging portion and the clamp are connected to two opposite end portions of the third main body, and the clamp is used for connecting with the truss.

[0018] In one of the embodiments, the clamp is connected to the first end face of the third main body away from the third engaging portion through a fastener;

[0019] The surface of the clamp facing the first end face is provided with a protruding portion, and the first end face is provided with a recessed portion, and the protruding portion is inserted into the recessed portion.

[0020] The second aspect of the embodiments of the present application provides a display screen comprising the above connecting device;

[0021] The display screen further comprises a plurality of frames arranged side by side along a preset direction, and each adjacent two frames are defined as a first frame and a second frame, and at least one connecting device is arranged between the first frame and the second frame.

[0022] The connecting device and the display screen have the following advantages:

[0023] The connecting device comprises a rotating shaft, a first mounting member, a second mounting member and a third mounting member connected to the rotating shaft, and the connecting device has an unlocked state, in which the first mounting member, the second mounting member and the third mounting member are configured to rotate relative to the rotating shaft to change the included angle between the first frame, the second frame and the truss. Therefore, when a display screen with a curved shape, such as an arc shape, is needed, the first mounting member and the second mounting member can be rotated relative to the rotating shaft in the unlocked state, so that the first frame connected to the first mounting member and the second frame connected to the second mounting member have an adjustable included angle relative to each other, and the display modules connected to the first frame and the second frame are adjusted to have a non-flat included angle, so that the display modules realize a curved shape. Since the connecting device has a locked state, in which the first mounting member, the second mounting member and the third mounting member are fixed relative to each other, the first frame, the second frame and the truss can be fixed relative to each other by setting the connecting state to the locked state, so that the display screen can maintain a curved shape, thereby meeting the splicing requirement of the display screen with a curved shape.

[0024] In addition, since the third mounting member can also rotate relative to the rotating shaft in the unlocked state, the included angle between the first frame and the second frame relative to the truss can be changed, which is convenient for an operator to adjust according to actual requirements. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A structural schematic diagram of the connecting device provided by the embodiment of the present application;

[0026] Figure 2 An exploded structural schematic diagram of the connecting device provided by the embodiment of the present application;

[0027] Figure 3 A structural schematic diagram of the connecting device provided by the embodiment of the present application applied to a display screen;

[0028] Figure 4 A partial enlarged view of the structure in the single-dot chain line frame of Figure 3 ;

[0029] Figure 5 A sectional view of the connecting device provided by the embodiment of the present application;

[0030] Figure 6Adjusting structure schematic view of connecting device provided by the embodiment of the application;

[0031] Figure 7 Adjusting structure schematic view of connecting device provided by the embodiment of the application.

[0032] Brief Description of the Drawings

[0033] 100, connecting device;

[0034] 10, first mounting member; 11, first fitting part; 111, through hole of first fitting part; 12, second fitting part; 121, through hole of second fitting part; 101, overlapping portion of first mounting member; 13, first main body; 131, first side edge; 1311, first avoiding notch; 132, first mounting hole;

[0035] 20, second mounting member; 21, first positioning part; 211, through hole of first positioning part; 22, second positioning part; 221, through hole of second positioning part; 201, overlapping portion of second mounting member; 23, second main body; 231, second side edge; 2311, second avoiding notch; 232, second mounting hole;

[0036] 30, third mounting member; 31, third fitting part; 311, through hole of third fitting part; 301, overlapping portion of third mounting member; 32, clamp; 320, protruding part; 33, third main body; 330, recessed part; 331, first end face;

[0037] 50, rotating shaft; 51, head portion of rotating shaft; 52, tail portion of rotating shaft; 53, local necked portion;

[0038] 60, abutting member;

[0039] 200, display screen; 201, frame; 2001, box frame; 210, first frame; 220, second frame; 230, truss;

[0040] F, preset direction; Y, first direction. DETAILED DESCRIPTION

[0041] In order to make the above objectives, characteristics and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without using these specific details. In other instances, well-known methods have not been described in detail in order to avoid unnecessarily obscuring the present application. Therefore, the present application is not limited to the specific embodiments disclosed in the following description.

[0042] In the description of the utility model, it is understood that the orientation or positional relationship indicated by 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" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0043] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0044] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0045] In the utility model, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0046] It is to be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0047] The connecting device and the display screen of the embodiments of the present application will be described below with reference to the accompanying drawings. It should be noted that the display screen in the present application can be an LED display screen, and the present application is not limited thereto, but can also be other types of display screens. For the case where the display screen is of other types, similar descriptions are provided, and thus will not be described herein.

[0048] Figure 1 A structural schematic diagram of the connecting device provided by the embodiments of the present application is shown in FIG. 1. Figure 2 An exploded structural schematic diagram of the connecting device provided by the embodiments of the present application is shown in FIG. 2. Figure 3 A structural schematic diagram of the connecting device provided by the embodiments of the present application applied to the display screen is shown in FIG. 3. Figure 4 A partial enlarged view of the structure in the single-dot chain line frame of FIG. 3 is shown in FIG. 4. Figure 3 A sectional view of the connecting device provided by the embodiments of the present application is shown in FIG. 5. Figure 5 An adjustment structural schematic diagram of the connecting device provided by the embodiments of the present application is shown in FIG. 6. Figure 6 An adjustment structural schematic diagram of the connecting device provided by the embodiments of the present application is shown in FIG. 6. Figure 7 An adjustment structural schematic diagram of the connecting device provided by the embodiments of the present application is shown in FIG. 6.

[0049] With reference to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the connecting device 100 provided by the embodiments of the present application is used to connect the first frame 210 and the second frame 220 arranged oppositely to the truss 230, and the connecting device 100 comprises a rotating shaft 50, and a first mounting member 10, a second mounting member 20 and a third mounting member 30 connected to the rotating shaft 50.

[0050] The first mounting member 10 is used to be connected to the first frame 210, the second mounting member 20 is used to be connected to the second frame 220, and the third mounting member 30 is used to be connected to the truss 230. In some embodiments, the first mounting member 10 and the first frame 210 can be connected by fasteners such as screws, bolts, etc., and the second mounting member 20 and the second frame 220 can also be connected by fasteners such as screws, bolts, etc.

[0051] The connecting device 100 has a locked state and an unlocked state. In the unlocked state, the first mounting member 10, the second mounting member 20 and the third mounting member 30 are configured to be rotatable relative to the rotation shaft 50 to change the included angle between the first frame 210, the second frame 220 and the truss 230.

[0052] In Figure 4 In the locked state shown, the first mounting member 10, the second mounting member 20 and the third mounting member 30 are configured to be fixed relative to each other.

[0053] By including the rotation shaft 50 and the first mounting member 10, the second mounting member 20 and the third mounting member 30 connected to the rotation shaft 50, and by having the connecting device 100 in the unlocked state in which the first mounting member 10, the second mounting member 20 and the third mounting member 30 are configured to be rotatable relative to the rotation shaft 50 to change the included angle between the first frame 210, the second frame 220 and the truss 230, when a display screen 200 with a curved shape, for example, an arc shape, is needed, the first mounting member 10, the second mounting member 20 and the third mounting member 30 can be rotated relative to the rotation shaft 50 in the unlocked state, so that the first frame 210 connected to the first mounting member 10 and the second frame 220 connected to the second mounting member 20 can have an adjustable included angle relative to each other, so that the display modules connected to the first frame 210 and the display modules connected to the second frame 220 can be adjusted to have a non-flat included angle, to realize the curved shape in the display screen 200. Since the connecting device 100 has the locked state in which the first mounting member 10, the second mounting member 20 and the third mounting member 30 are configured to be fixed relative to each other, when the connecting device 100 is set to the locked state, the first frame 210, the second frame 220 and the truss 230 can be fixed relative to each other, so that the display screen 200 can maintain the curved shape, thereby realizing the splicing requirement of the display screen 200 with a curved shape with a small number of parts and a simple operation process.

[0054] In addition, since the third mounting member 30 can also be rotated relative to the rotation shaft 50 in the unlocked state, the included angle between the first frame 210 and the second frame 220 relative to the truss 230 can be changed, which is convenient for the operator to adjust according to actual needs.

[0055] In some embodiments, the included angle between the first mounting member 10 and the third mounting member 30 can be equal to the included angle between the second mounting member 20 and the third mounting member 30.

[0056] Continuing to refer to Figure 1In the embodiment, the first mounting member 10, the second mounting member 20 and the third mounting member 30 each have an overlapping portion overlapping with each other in the axial direction of the rotating shaft 50, and the rotating shaft 50 penetrates through the overlapping portions and abuts against the overlapping portions in the axial direction of the rotating shaft 50 in the locked state.

[0057] The first mounting member 10, the second mounting member 20 and the third mounting member 30 each have an overlapping portion overlapping with each other in the axial direction of the rotating shaft 50, means that the overlapping portion 101 of the first mounting member, the overlapping portion 201 of the second mounting member and the overlapping portion 301 of the third mounting member overlap with each other in the projection in the plane perpendicular to the rotating shaft 50. The rotating shaft 50 abuts against the overlapping portions in the axial direction of the rotating shaft 50 in the locked state, means that the rotating shaft 50 can make the overlapping portion 101 of the first mounting member, the overlapping portion 201 of the second mounting member and the overlapping portion 301 of the third mounting member abut against each other and abut against each other in the axial direction of the rotating shaft 50 in the locked state.

[0058] In the embodiment, continuing to refer to Figure 1 and Figure 2 , the first mounting member 10 includes a first fitting portion 11 and a second fitting portion 12, the second mounting member 20 includes a first positioning portion 21 and a second positioning portion 22, the third mounting member 30 includes a third fitting portion 31, and the head portion 51 of the rotating shaft is configured as a locally enlarged diameter portion.

[0059] The first fitting portion 11 and the second fitting portion 12 partially or entirely form the overlapping portion 101 of the first mounting member. The first positioning portion 21 and the second positioning portion 22 partially or entirely form the overlapping portion 201 of the second mounting member. At least part of the third fitting portion 31 forms the overlapping portion 301 of the third mounting member.

[0060] The tail portion 52 of the rotating shaft penetrates through the first fitting portion 11, the third fitting portion 31, the first positioning portion 21, the second fitting portion 12 and the second positioning portion 22 in sequence in the axial direction of the rotating shaft and is detachably connected with the second positioning portion 22, so that the head portion 51 of the rotating shaft abuts against the first fitting portion 11.

[0061] When the head portion 51 of the rotating shaft abuts against the first fitting portion 11 and the tail portion 52 of the rotating shaft is detachably connected with the second positioning portion 22, the first fitting portion 11, the third fitting portion 31, the first positioning portion 21, the second fitting portion 12 and the second positioning portion 22 overlap with each other and generate frictional force, thereby preventing mutual rotation.

[0062] Further, the first fitting part 11, the second fitting part 12, the third fitting part 31, the first positioning part 21 and the second positioning part 22 are all provided with through holes for the rotation shaft 50 to pass through. The tail part 52 of the rotation shaft is screwed with the through hole 221 of the second positioning part. In this way, as long as the rotation shaft 50 is screwed, the rotation shaft 50 is unscrewed with the second positioning part 22, the switching from the locked state to the unlocked state can be realized.

[0063] In the implementation, the through hole 111 of the first fitting part, the through hole 121 of the second fitting part, the through hole 211 of the first positioning part and the through hole 221 of the second positioning part are all circular holes for the rotation shaft 50 to pass through. Among them, the through hole 221 of the second positioning part is a threaded hole, which is screwed with the tail part 52 of the rotation shaft.

[0064] In the embodiment, the first mounting part 10 further includes a first main body 13, and the first fitting part 11 and the second fitting part 12 are connected to the first side edge 131 of the first main body 13. The first side edge 131 is also provided with a first avoiding notch 1311 corresponding to the position of the third fitting part 31.

[0065] The second mounting part 20 further includes a second main body 23, and the first positioning part 21 and the second positioning part 22 are connected to the second side edge 231 of the second main body 23. The second side edge 231 is also provided with a second avoiding notch 2311 corresponding to the position of the third fitting part 31. In this way, the third fitting part 31 is provided with a moving space relative to the first main body 13 and the second main body 23.

[0066] In combination with Figure 2 and Figure 4 , the first main body 13 is provided with a plurality of first installation holes 132 in the shape of long circle, and the second main body 23 is also provided with a plurality of second installation holes 232 in the shape of long circle. The first installation holes 132 in the shape of long circle are used to connect with the first frame 210, and the relative position of the first main body 13 and the first frame 210 can be adjusted by moving in the length direction of the long circle. The second installation holes 232 in the shape of long circle are used to connect with the second frame 220, and the relative position of the second main body 23 and the second frame 220 can be adjusted by moving in the length direction of the long circle.

[0067] Further, in combination with Figure 2 and Figure 5The connecting device 100 further comprises a pressing member 60, which penetrates from the outer surface of the first fitting part 11 into the through hole 111 of the first fitting part and is used to press against the outer circumferential surface of the rotating shaft 50. In this way, the rotating shaft 50 can be prevented from being pulled out of the respective through holes of the first fitting part 11, the second fitting part 12, the third fitting part 31 and the first positioning part 21 after being disconnected from the second positioning part 22. In a specific implementation, the pressing member 60 is threadedly connected with the first fitting part 11, so that the pressing member 60 can be disconnected or pressed against the rotating shaft 50 by loosening or tightening the pressing member 60.

[0068] Further, the position on the rotating shaft 50 corresponding to the pressing member 60 is provided with a local necked part 53.

[0069] By providing the local necked part 53 on the rotating shaft 50, a step surface can be formed between the local necked part 53 and other parts of the rotating shaft 50. In this way, when the end of the pressing member 60 abuts into the local necked part 53, the step surface abuts against the end of the pressing member 60 when the rotating shaft 50 has a tendency to move along the axial direction of the rotating shaft 50, so that the rotating shaft 50 is limited and cannot move.

[0070] In the embodiments of the present application, in combination with Figure 1 and Figure 4 The third mounting member 30 further comprises a third main body 33 and a clamping hoop 32, the third fitting part 31 and the clamping hoop 32 are connected to the two opposite end portions of the third main body 33, and the clamping hoop 32 is used to be connected with the truss 230.

[0071] The clamping hoop 32 is connected to the first end face 331 of the third main body 33 away from the third fitting part 31 by a fastener. The surface of the clamping hoop 32 facing the first end face 331 is provided with a protruding part 320, and the first end face 331 is provided with a recessed part 330, and the protruding part 320 is inserted into the recessed part 330. In this way, when the clamping hoop 32 is installed on the first end face 331, the insertion fit of the protruding part 320 and the recessed part 330 can play a pre-positioning role.

[0072] In addition, in the embodiments of the present application, in combination with Figure 2 and Figure 6 The through hole on the third fitting part 31 for the rotating shaft 50 to penetrate, i.e., the through hole 311 of the third fitting part, can be configured as an oblong hole, and the length direction of the oblong hole can be along the extension direction of the third mounting member 30, so that the relative position of the third mounting member 30 relative to the rotating shaft 50 in the extension direction of the third mounting member 30 is adjustable.

[0073] For example, for Figure 6In the attached diagram on the left, the third mounting member 30 moves relative to the rotating shaft 50 to a position closer to the first mounting member 10 and the second mounting member 20, and abuts against the rotating shaft 50 through the through hole 311 of the third mating part. At this time, the distance between the third mounting member 30 and the first mounting member 10 and the second mounting member 20 is the smallest.

[0074] for Figure 6 In the attached diagram on the right, the third mounting member 30 moves away from the first mounting member 10 and the second mounting member 20 relative to the rotation shaft 50, and abuts against the through hole 311 of the third mating part. At this time, the distance between the third mounting member 30 and the first mounting member 10 and the second mounting member 20 is the largest.

[0075] Reference Figure 7 In the unlocked state, the first installer 10 and the second installer can be used as follows: Figure 7 As shown in the leftmost attached figure, the included angle is 180°. Thus, the included angle between the first frame 210 connected to the first mounting member 10 and the second frame 220 connected to the second mounting member 20 is 180°. In this way, the display module connected to the first frame 210 and the display module connected to the second frame 220 form a planar display screen (0-degree planar state).

[0076] The first mounting component 10 and the second mounting component can be as follows: Figure 7 As shown in the middle of the attached diagram, the included angle is 175°. Thus, the included angle between the first frame 210 connected to the first mounting member 10 and the second frame 220 connected to the second mounting member 20 on the display module side is 185°. In this way, the display module connected to the first frame 210 and the display module connected to the second frame 220 form an arched display screen (outer arc of 5 degrees).

[0077] The first mounting component 10 and the second mounting component can be as follows: Figure 7 As shown in the rightmost attached figure, the included angle is 170°. Thus, the included angle between the first frame 210 connected to the first mounting member 10 and the second frame 220 connected to the second mounting member 20 on the display module side is 170°. In this way, the display module connected to the first frame 210 and the display module connected to the second frame 220 form a concave display screen (with an inner arc of 10 degrees).

[0078] Reference Figure 3 This application also provides a display screen 200, including the connection device 100 as described above.

[0079] The display screen 200 also includes a plurality of frames 201 arranged side by side along a preset direction F. Each frame 201 may include a plurality of cabinet frames 2001 arranged in an array. A display module (not shown) is connected to the side of each cabinet frame 2001 facing away from the connecting device 100.

[0080] Among every two adjacent frames 201, one of the frames 201 is defined as a first frame 210, and the other frame 201 is defined as a second frame 220, and at least one connecting device 100 is connected between the first frame 210 and the second frame 220.

[0081] It can be understood that when there are multiple connecting devices 100 connected between the first frame 210 and the second frame 220, the connecting devices 100 can be arranged at intervals along a first direction Y which is perpendicular to the preset direction F.

[0082] The technical features of the above-described embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not contradict each other, they should be considered as falling within the scope of the present disclosure.

[0083] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be pointed out that, for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A connection device for connecting first and second frames, which are arranged opposite each other, to a truss, characterized in that The connecting device comprises a rotating shaft, and a first mounting member, a second mounting member and a third mounting member connected to the rotating shaft; The first mounting member is used for connecting with the first frame, the second mounting member is used for connecting with the second frame, and the third mounting member is used for connecting with the truss; The connecting device has a locking state and an unlocking state; in the unlocking state, the first mounting member, the second mounting member and the third mounting member are configured to be rotatable relative to the rotating shaft, so as to change the included angle between the first frame, the second frame and the truss; In the locking state, the first mounting member, the second mounting member and the third mounting member are configured to be fixed relative to each other.

2. The connection device according to claim 1, characterized in that The first mounting member, the second mounting member and the third mounting member each have a portion overlapping with each other in the axial direction of the rotating shaft, and the rotating shaft penetrates through each of the portions overlapping with each other and is used for abutting the portions overlapping with each other against each other in the axial direction of the rotating shaft in the locking state.

3. The connection device according to claim 2, characterized in that The first mounting member comprises a first fitting part and a second fitting part, the second mounting member comprises a first positioning part and a second positioning part, the third mounting member comprises a third fitting part, and the head of the rotating shaft is configured as a locally enlarged diameter part; The tail of the rotating shaft penetrates through the first fitting part, the third fitting part, the first positioning part, the second fitting part and the second positioning part in sequence in the axial direction of the rotating shaft, and is detachably connected with the second positioning part, so that the head of the rotating shaft is abutted against the first fitting part.

4. The connection device according to claim 3, characterized in that Holes are formed in the first fitting part, the second fitting part, the third fitting part, the first positioning part and the second positioning part, and the rotating shaft penetrates through the holes; The tail of the rotating shaft is threadedly connected with the hole of the second positioning part.

5. The connection device according to claim 4, characterized in that The first mounting member further comprises a first main body, the first fitting part and the second fitting part are connected to the first side edge of the first main body, and a first avoiding notch is formed in the first side edge corresponding to the position of the third fitting part; The second mounting member further comprises a second main body, the first positioning part and the second positioning part are connected to the second side edge of the second main body, and a second avoiding notch is formed in the second side edge corresponding to the position of the third fitting part.

6. The connection device of claim 4, wherein The connecting device further comprises an abutting member, the abutting member penetrates from the outer surface of the first fitting part to the hole of the first fitting part, and is used for abutting against the outer circumferential surface of the rotating shaft.

7. The connection device according to claim 6, characterized in that A locally constricted part is arranged on the rotating shaft corresponding to the position of the abutting member.

8. The connection device according to any one of claims 3-7, characterized in that, The third mounting member further comprises a third main body and a clamp, the third fitting part and the clamp are connected to the two opposite end portions of the third main body, and the clamp is used for connecting with the truss.

9. The connection device according to claim 8, characterized in that The clamp is connected to the first end face of the third main body away from the third fitting part through a fastener; The surface of the clamp facing the first end face is provided with a protruding part, and the first end face is provided with a recessed part, and the protruding part is inserted into the recessed part.

10. A display screen, characterized by The connecting device comprises a rotating shaft, and a first mounting member, a second mounting member and a third mounting member connected to the rotating shaft; The display screen further comprises a plurality of frames arranged side by side along a preset direction, and each adjacent two frames are defined as a first frame and a second frame, and at least one connecting device is connected between the first frame and the second frame.

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