Connecting device, supporting unit and wind-resistant frame

Abstract

The utility model belongs to the technical field of fixing structures, and discloses a connecting device, a supporting unit and a wind-resistant frame. The connecting device comprises a first connecting rod, an adjusting rod, a second connecting rod and a locking assembly. One end of the first connecting rod is connected with the supporting rod, and the other end is provided with a first connecting block fixedly connected with the display device; one end of the adjusting rod is connected with the supporting rod, and the other end extends away from the first connecting rod; one end of the second connecting rod is slidably connected to the second connecting rod, and the other end of the second connecting rod is provided with a second connecting block fixedly connected with the display device; the locking assembly is arranged on the adjusting rod and can abut against the second connecting rod so as to lock the adjusting rod and the second connecting rod. Therefore, when the connecting device is used, a plurality of connecting structures with different lengths do not need to be configured, the adaptability of the connecting device is effectively improved, meanwhile, the number of the structures can be effectively reduced, storage and arrangement are convenient, the disassembly and assembly difficulty can be effectively reduced, and then the disassembly and assembly efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of fixed structure technology, and in particular to connecting devices, support units and wind-resistant frames. Background Technology

[0002] The wind-resistant frame is the core support structure when installing outdoor display screens and other devices. The wind-resistant frame consists of multiple sets of support units that are assembled and fixed in sequence. Each support unit is fixedly connected to the display screen and other devices through connecting rods to ensure that the overall stability meets the requirements.

[0003] In the prior art, both ends of the connecting rod are equipped with high-strength bolts, and since the installation positions of different display screens and other devices are different, multiple sets of connecting rods of different sizes are configured accordingly. During installation, the corresponding length of the connecting rod is selected, and then one end of the connecting rod is fixedly connected to the support unit by bolts, while the other end is connected to the display screen and other devices.

[0004] The aforementioned wind-resistant frame not only requires the configuration of connecting rods of different lengths, resulting in a large number of parts and making storage difficult, but also requires the tightening of multiple bolts during the assembly and disassembly of the connecting rods, making the assembly and disassembly of the connecting rods difficult and inefficient, thus affecting the overall assembly and disassembly efficiency of devices such as display screens. Utility Model Content

[0005] The purpose of this utility model is to provide a connecting device, a support unit, and a wind-resistant frame, which solves the problems of large component structure and difficult storage of wind-resistant frames in the prior art. It also solves the problems of difficult and inefficient assembly and disassembly of connecting rods, resulting in low overall assembly and disassembly efficiency of display screens and other devices.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] In a first aspect, this utility model provides a connecting device, which includes:

[0008] The first connecting rod has one end connected to the support rod and the other end provided with a first connecting block that is fixedly connected to the display device;

[0009] The adjusting rod has one end connected to the support rod and the other end extending away from the first connecting rod;

[0010] The second connecting rod has one end slidably connected to the second connecting rod, and the other end of the second connecting rod is provided with a second connecting block that is fixedly connected to the display device;

[0011] A locking component is provided on the adjusting rod and can abut against the second connecting rod to lock the adjusting rod and the second connecting rod.

[0012] Optionally, the locking component includes:

[0013] A locking sleeve, one end of which is slidably connected to the adjusting rod, and the other end passes through the second connecting rod and is slidably connected to the second connecting rod;

[0014] A locking disc is provided at one end of the locking sleeve that extends out of the second connecting rod and can abut against and fix the second connecting rod.

[0015] Optionally, the surface of the second connecting rod is provided with a plurality of slots spaced apart along the sliding direction of the adjusting rod for the locking disc to be inserted.

[0016] Optionally, the locking component further includes:

[0017] An elastic element, one end of which abuts against the adjusting rod, and the other end of which abuts against the locking sleeve to push the locking sleeve and move the locking disc away from the second connecting rod;

[0018] The locking part has one end passing through the locking disc and extending into the adjusting rod, where it is threadedly connected to the adjusting rod. The other end abuts against the locking disc to push the locking disc closer to the second connecting rod.

[0019] Optionally, the connecting device further includes:

[0020] A guide portion is disposed on the side of the adjusting rod away from the locking assembly. The second connecting rod has a guide groove, and the guide portion extends at least partially into the guide groove and slides in cooperation with the guide groove.

[0021] Optionally, the connecting device further includes:

[0022] An elastic part is provided on the adjusting rod;

[0023] The inner side wall of the second connecting rod is provided with a limiting hole that engages with the elastic part.

[0024] Optionally, the first connecting block is rotatably connected to the first connecting rod; and / or

[0025] The second connecting block is rotatably connected to the second connecting rod; and / or

[0026] At least one of the first connecting rod and the second connecting rod is rotatably connected to the support rod.

[0027] Secondly, the support unit includes:

[0028] Support rod;

[0029] Multiple connecting devices as described in any one of the first aspects are spaced apart on the support rod and connected to the display device.

[0030] Optionally, the support unit includes:

[0031] A first connector is disposed at one end of the support rod;

[0032] The second connector is located at the other end of the support rod and is plugged into and fixed to the first connector.

[0033] Thirdly, a wind-resistant frame, used for fixing and installing the display device, includes:

[0034] Multiple support units as described in the second aspect are sequentially spliced ​​together and fixedly connected to the display device.

[0035] The beneficial effects of this utility model are:

[0036] Firstly, when connecting the display device, the length of the extended second connecting rod is adjusted according to the position of the connecting structure on the display device, thereby adjusting the distance between the first and second connecting blocks. When both the first and second connecting blocks correspond to the connecting structure, the locking component is pressed against the second connecting rod to lock it in place, and then the first and second connecting blocks are fixedly connected to the display device respectively. Therefore, when using this connecting device, the distance between the first and second connecting blocks can be flexibly adjusted according to different display devices, eliminating the need for multiple connecting structures of different lengths, effectively improving the adaptability of the connecting device. Furthermore, by directly mounting the first and second connecting rods on the support rod, separate disassembly and assembly are no longer required, effectively reducing the number of structures, facilitating storage and organization, and also effectively reducing the difficulty of disassembly and assembly, thereby improving efficiency.

[0037] Secondly, when the support unit is installed outdoors, it can quickly adapt to different types of display devices using the connecting device, thereby effectively improving the adaptability of the support unit and simplifying the installation and disassembly process, thus effectively improving the installation and disassembly efficiency.

[0038] Thirdly, when the wind-resistant frame is installed outdoors, two adjacent support units can be quickly assembled. Each support unit can also be fixedly connected to the display device through the connecting device, thereby reducing the number of bolts that need to be tightened during the installation process, effectively reducing the difficulty of installation and disassembly, and improving the efficiency of installation and disassembly of the display device. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the support unit in an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the structure of the connecting device when the adjusting rod and the second connecting rod are fully retracted in the embodiment of this utility model;

[0041] Figure 3This is a cross-sectional view of the structure of the connecting device when the adjusting rod and the second connecting rod are fully retracted in the embodiment of this utility model;

[0042] Figure 4 This is a schematic diagram of the structure of the connecting device when the adjusting rod and the second connecting rod are fully extended in the embodiment of this utility model;

[0043] Figure 5 This is a cross-sectional view of the structure of the connecting device when the adjusting rod and the second connecting rod are fully extended in the embodiment of this utility model;

[0044] Figure 6 This is a structural schematic diagram of the support unit when the included angle between the second connecting rod and the first connecting rod is less than 180° in an embodiment of this utility model.

[0045] Figure 7 This is a schematic diagram of the assembly of two sets of support units in the wind-resistant frame in this embodiment of the utility model.

[0046] In the picture:

[0047] 1. First connecting rod; 11. First connecting block; 2. Second connecting rod; 21. Second connecting block; 22. Slide rail; 23. Slot; 24. Guide groove; 25. Limiting hole; 3. Adjusting rod; 4. Locking assembly; 41. Locking sleeve; 42. Locking disc; 43. Elastic element; 44. Locking part; 45. Pressure head; 46. Knob; 5. Support rod; 6. Guide part; 7. Elastic part; 8. First connector; 9. Second connector. Detailed Implementation

[0048] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0049] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0050] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0052] This utility model discloses a connecting device, a support unit, and a wind-resistant frame.

[0053] Reference Figures 1 to 5 The connecting device includes a first connecting rod 1, a second connecting rod 2, an adjusting rod 3, and a locking assembly 4. One end of the first connecting rod 1 is connected to a support rod 5, and the other end is provided with a first connecting block 11 fixedly connected to the display device; one end of the adjusting rod 3 is connected to the support rod 5, and the other end extends away from the first connecting rod 1; one end of the second connecting rod 2 is slidably connected to the adjusting rod 3, and the other end is provided with a second connecting block 21 fixedly connected to the display device; the locking assembly 4 is provided on the adjusting rod 3 and can abut against the second connecting rod 2 to lock the adjusting rod 3 and the second connecting rod 2.

[0054] Specifically, the first connecting rod 1 and the adjusting rod 3 are located on both sides of the support rod 5. Both can be fixedly connected to the support rod 5, or rotatably connected to the support rod 5 via a hinge or other structure. Alternatively, one can be fixedly connected to the support rod 5 while the other is rotatably connected, facilitating adjustment of the angle between the first connecting rod 1 and the second connecting rod 2. A first connecting block 11 is provided at the end of the first connecting rod 1 furthest from the support rod 5. The first connecting block 11 can be adapted to the connection structure of the display device. The first connecting block 11 and the connection structure can be fixedly connected by bolts, or they can be plugged into each other to form a snap-fit ​​connection. In this embodiment, the first connecting block 11 has two through holes, each containing a screw that is threadedly connected to the connection structure. The second connecting block 21 has the same structure as the first connecting block 11, and will not be described further here.

[0055] The second connecting rod 2 is hollow, and the adjusting rod 3 is slidably connected inside the second connecting rod 2. The adjusting rod 3 can be a telescopic structure, allowing it to extend and retract. Alternatively, the adjusting rod 3 can be a straight rod, allowing the second connecting rod 2 to slide out or retract away from the supporting rod 5, thus achieving extension and retraction. The locking component 4 is disposed on the adjusting rod 3, and part of it passes through the second connecting rod 2 and slides in cooperation with it. The locking component 4 can selectively abut against the second connecting rod 2. That is, when the locking component 4 is not abutting against the second connecting rod 2, the second connecting rod 2 can slide relative to the adjusting rod 3, while when the locking component 4 abuts against the second connecting rod 2, the second connecting rod 2 will remain fixed to the adjusting rod 3.

[0056] When connecting the display device, the length of the second connecting rod 2 is adjusted according to the position of the connecting structure on the display device, thereby adjusting the distance between the first connecting block 11 and the second connecting block 21. When both the first connecting block 11 and the second connecting block 21 correspond to the connecting structure, the locking component 4 is pressed against the second connecting rod 2 to lock the second connecting rod 2, and then the first connecting block 11 and the second connecting block 21 are fixedly connected to the display device respectively. Therefore, when using this connecting device, the distance between the first connecting block 11 and the second connecting rod 21 can be flexibly adjusted according to different display devices, eliminating the need for multiple connecting structures of different lengths, effectively improving the adaptability of the connecting device. At the same time, the first connecting rod 1 and the second connecting rod 2 are directly set on the support rod 5, eliminating the need for separate disassembly and assembly. This not only effectively reduces the number of structures and facilitates storage and organization, but also effectively reduces the difficulty of disassembly and assembly, thereby improving the efficiency of disassembly and assembly.

[0057] Optionally, the locking assembly 4 includes a locking sleeve 41 and a locking disc 42. One end of the locking sleeve 41 is slidably connected to the adjusting rod 3, and the other end passes through the second connecting rod 2 and is slidably connected to the second connecting rod 2; the locking disc 42 is disposed at the end of the locking sleeve 41 that extends out of the second connecting rod 2 and can abut against and be fixed to the second connecting rod 2.

[0058] Specifically, a mounting hole is provided on the side of the adjusting rod 3, near the support rod 5. One end of the locking sleeve 41 extends into the mounting hole and slides in cooperation with it. The sliding direction intersects with the extension and retraction direction of the adjusting rod 3. In this embodiment, the two directions are perpendicular to each other. The other end of the locking sleeve 41 passes through the second connecting rod 2. A slide rail 22 is provided on the side of the second connecting rod 2 for the locking sleeve 41 to slide.

[0059] The locking sleeve 41 passes through the slide rail 22 and is provided with the aforementioned locking disc 42. The two can be an integral structure or fixed by means of threaded connection or bolt connection. The diameter of the locking disc 42 is larger than the diameter of the locking sleeve 41. The side of the locking disc 42 can abut against the side of the second connecting rod 2. The abutment can be achieved by snap-fit ​​or by pressing the locking disc 42 with other structures.

[0060] By setting a locking sleeve 41 and a locking disc 42, the locking disc 42 can be separated from the second connecting rod 2 when the adjusting rod 3 is extended or retracted, thus unlocking the rod. At this time, the adjusting rod 3 can extend or retract relative to the second connecting rod 2. When it is extended or retracted to the specified length, the locking disc 42 is pressed against the second connecting rod 2 to lock the adjusting rod 3. This reduces the difficulty of locking and unlocking the adjusting rod 3, saves time and effort, and improves the convenience of adjusting the extension length of the adjusting rod 3.

[0061] Optionally, the surface of the second connecting rod 2 is provided with a plurality of slots 23 for the locking disc 42 to be inserted into, spaced apart along the sliding direction of the adjusting rod 3.

[0062] Specifically, the slot 23 is shaped to match the locking disc 42, and the inner diameter of the slot 23 can be equal to the diameter of the locking disc 42, so that after the locking disc 42 is inserted into the slot 23, the side wall of the locking disc 42 completely fits against the groove wall of the slot 23. The inner diameter of the slot 23 can also be slightly larger than the locking disc 42, and elastic pads or elastic protrusions are provided in the groove side wall of the slot 23 to ensure that the locking disc 42 abuts against the side wall of the locking disc 42 after insertion. Alternatively, the inner diameter of the slot 23 can be smaller than the outer diameter of the locking disc 42. In this case, a plug or other structure that can be inserted into the slot 23 can be provided on the side of the locking disc 42 near the second connecting rod 2. The specific size of the slot 23 can be designed according to the actual operational difficulty. In this embodiment, the inner diameter of the slot 23 is equal to the diameter of the locking disc 42.

[0063] The number of slots 23 can be designed according to the actual extension range of the adjusting rod 3. There can be one, two or more. In this embodiment, two slots 23 are set at intervals, which correspond to the two cases of the second connecting rod 2 being fully extended and fully retracted, respectively.

[0064] By setting the slot 23, when the second connecting rod 2 needs to be locked, the locking disc 42 is inserted into the slot 23, and the locking disc 42 is fixed by the locking force between the locking disc 42 and the slot 23, thereby improving the locking effect of the locking disc 42.

[0065] Optionally, the locking assembly 4 further includes an elastic element 43 and a locking part 44. One end of the elastic element 43 abuts against the adjusting rod 3, and the other end abuts against the locking sleeve 41 to push the locking sleeve 41 to move the locking disc 42 away from the second connecting rod 2; one end of the locking part 44 passes through the locking disc 42 and extends into the adjusting rod 3 and is threadedly connected to the adjusting rod 3, and the other end abuts against the locking disc 42 to push the locking disc 42 closer to the second connecting rod 2.

[0066] Specifically, the elastic element 43 is located inside the mounting hole. It can be an elastic rod or a spring. In this embodiment, the elastic element 43 is a spring. One end of the spring is fixedly connected to the bottom wall of the mounting hole, and the other end is fixedly connected to the bottom wall of the locking sleeve 41. The spring is in a compressed state to maintain the tendency to push the locking sleeve 41 out of the adjusting rod 3.

[0067] The locking part 44 is rod-shaped, with one end extending into the mounting hole and a spring sleeved on its outer side. The end of the locking part 44 extending into the mounting hole is threaded. This thread can be on the outside of the locking part 44, in which case a threaded hole is formed at the bottom of the mounting hole, allowing the locking part 44 to form a threaded connection with the adjusting rod 3. Alternatively, the thread of the locking part 44 can be internal, with a threaded hole on the end face of the locking part 44, and a fixing stud threaded into the mounting hole, also enabling a threaded connection between the locking part 44 and the adjusting rod 3.

[0068] The locking part 44 has a pressure head 45 at one end located outside the locking disc 42. The pressure head 45 is larger than the locking part 44, and the bottom wall of the pressure head 45 can press against the side wall of the locking disc 42 to push the locking disc 42 closer to the second connecting rod 2. A knob 46 can also be provided on the end face of the pressure head 45, and locking and unlocking patterns can be engraved on the knob 46.

[0069] By incorporating the elastic element 43 and the locking part 44, when locking is required, the locking part 44 is screwed on to push the locking disc 42 closer to the second connecting rod 2. Once the locking disc 42 is pressed against the second connecting rod 2, the locking part 44 is fixed to the adjusting rod 3 by its threaded self-locking mechanism. When unlocking, the locking part 44 is reversed. When the locking part 44 separates from the locking disc 42, the elastic force generated by the elastic element 43 pushes the locking sleeve out, which in turn pushes the locking disc 42 away from the second connecting rod 2, thus quickly releasing the lock. Therefore, both locking and unlocking operations of the locking assembly 4 can be completed by simply screwing on the locking sleeve, making the operation more convenient, simple, time-saving, and labor-saving.

[0070] Optionally, the connecting device further includes a guide portion 6. The guide portion 6 is disposed on the side of the adjusting rod 3 away from the locking component 4, and the second connecting rod 2 has a guide groove 24. The guide portion 6 extends at least partially into the guide groove 24 and slides in cooperation with the guide groove 24.

[0071] Specifically, a threaded hole is provided at the end of the fixed stud away from the locking part 44. The guide part 6 is made of bolt, and its stud is threadedly connected in the threaded hole. The bolt head is slidably connected in the guide groove 24. The guide groove 24 extends along the extension and retraction direction of the adjusting rod 3. The width of the guide groove 24 is just equal to the diameter of the screw head, so that the side wall of the screw head slides against the groove wall of the guide groove 24. In order to reduce friction, a smooth film or other structure can also be provided on the groove wall of the guide groove 24.

[0072] By setting the guide part 6 and the guide groove 24, when the adjusting rod 3 slides, the guide part 6 can be driven to slide in the guide groove 24 to ensure that the adjusting rod 3 will not deviate during the extension and retraction process.

[0073] Optionally, the connecting device further includes an elastic part 7. The elastic part 7 is disposed on the adjusting rod 3; wherein, the inner side wall of the second connecting rod 2 is provided with a limiting hole 25 that engages with the elastic part 7.

[0074] Specifically, an elastic part 7 is provided on the side wall of the adjusting rod 3. The elastic part 7 can be a structure with a certain elasticity, such as a glass bead. The end of the elastic part 7 near the second connecting rod 2 is spherical to facilitate its adaptation to the limiting hole 25. Multiple elastic parts 43 can be provided at intervals. In this embodiment, two elastic parts 7 are provided and are distributed at intervals on both sides of the guide part 6 along the width direction of the adjusting rod 3. Two limiting holes 25 are provided on the inner side wall of the second connecting rod 2 at the position corresponding to the slot 23, so that when the adjusting rod 3 is locked, the elastic parts 7 can be engaged in the limiting holes 25.

[0075] Reference Figure 6 Optionally, the first connecting block 11 is rotatably connected to the first connecting rod 1.

[0076] Specifically, a pivot is provided at the end of the first connecting rod 1, and the first connecting block 11 is rotatably connected to the pivot to facilitate adjustment of the orientation of the first connecting block 11. Similarly, the second connecting block 21 can also adopt the same structure and be rotatably connected to the second connecting rod 2.

[0077] Optionally, at least one of the first connecting rod 1 and the adjusting rod 3 is rotatably connected to the support rod 5.

[0078] Specifically, taking the fixed connection between the first connecting rod 1 and the support rod 5 as an example, the adjusting rod 3 is rotatably connected to the support rod 5 via a hinge, so as to adjust the included angle between the first connecting rod 1 and the second connecting rod 2, and at the same time, to facilitate folding and storing the first connecting rod 1 and the second connecting rod 2 after disassembly. It should be understood that the first connecting rod 1 can also be rotatably connected to the support rod 5, while the adjusting rod 3 can be fixedly connected to the support rod 5, or both the first connecting rod 1 and the adjusting rod 3 can be rotatably connected to the support rod 5 at the same time. This utility model does not limit this.

[0079] The support unit includes a support rod 5 and multiple connecting devices as described above. These connecting devices are spaced apart on the support rod 5 and connected to the display device.

[0080] When installed outdoors, this support unit can quickly adapt to different types of display devices using the connecting device, thereby effectively improving the adaptability of the support unit and simplifying the installation and disassembly process, thus effectively improving the installation and disassembly efficiency.

[0081] Optionally, the support unit includes a first connector 8 and a second connector 9. The first connector 8 is disposed at one end of the support rod 5; the second connector 9 is disposed at the other end of the support rod 5 and is inserted and fixed to the first connector 8.

[0082] Specifically, the first connector 8 is cylindrical and can be inserted into a protrusion inside the second connector 9. The second connector 9 is at least partially rotatable to lock the protrusion of the first connector 8. This locking and tightening of adjacent support rods 5 via the first connector 8 and the second connector 9 not only further improves the assembly and disassembly efficiency of the support unit but also allows the fixing structure to be placed internally, thereby improving overall neatness.

[0083] Reference Figure 7 The wind-resistant frame is used to fix the display device in place, and it includes multiple support units as described above. The multiple support units are spliced ​​together in sequence and fixedly connected to the display device.

[0084] When the wind-resistant frame is installed outdoors, two adjacent support units can be quickly assembled. Each support unit can also be fixedly connected to the display device through the connecting device, thereby reducing the number of bolts that need to be tightened during the installation process, effectively reducing the difficulty of installation and disassembly, and improving the efficiency of installation and disassembly of the display device.

[0085] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A connection device, characterized in that Comprising: a first connecting rod (1) having one end connected with a supporting rod (5) and the other end provided with a first connecting block (11) fixedly connected with a display device; an adjusting rod (3) having one end connected with the supporting rod (5) and the other end extending away from the first connecting rod (1); a second connecting rod (2) having one end slidingly connected with the adjusting rod (3) and the other end provided with a second connecting block (21) fixedly connected with the display device; a locking assembly (4) provided on the adjusting rod (3) and capable of abutting against the second connecting rod (2) to lock the adjusting rod (3) and the second connecting rod (2).

2. The connection device according to claim 1, characterized in that The locking assembly (4) comprises: a locking sleeve (41) having one end slidingly connected with the adjusting rod (3) and the other end penetrating through the second connecting rod (2) and slidingly connected with the second connecting rod (2); a locking disc (42) provided on the end of the locking sleeve (41) extending out of the second connecting rod (2) and capable of abutting against the second connecting rod (2) to be fixed.

3. The connection device according to claim 2, characterized in that The surface of the second connecting rod (2) is provided with a plurality of clamping grooves (23) for the locking disc (42) to be inserted, which are spaced apart along the sliding direction of the adjusting rod (3).

4. The connection device of claim 2, wherein The locking assembly (4) further comprises: a resilient member (43) having one end abutting against the adjusting rod (3) and the other end abutting against the locking sleeve (41) to push the locking sleeve (41) to drive the locking disc (42) away from the second connecting rod (2); a locking portion (44) having one end penetrating through the locking disc (42) and extending into the adjusting rod (3) to be threadedly connected with the adjusting rod (3) and the other end abutting against the locking disc (42) to push the locking disc (42) to be close to the second connecting rod (2).

5. The connection device according to any one of claims 1 to 4, characterized in that The connecting device further comprises: a guide portion (6) provided on the side of the adjusting rod (3) away from the locking assembly (4), the second connecting rod (2) having a guide groove (24), and the guide portion (6) at least partially extending into the guide groove (24) to be slidingly matched with the guide groove (24).

6. The connection device according to any one of claims 1 to 4, characterized in that The connecting device further comprises: a resilient portion (7) provided on the adjusting rod (3); wherein the inner side wall of the second connecting rod (2) is provided with a limiting hole (25) for the resilient portion (7) to be clamped.

7. The connection device according to any one of claims 1 to 4, characterized in that The first connecting block (11) is rotationally connected with the first connecting rod (1); and / or The second connecting block (21) is rotationally connected with the second connecting rod (2); and / or At least one of the first connecting rod (1) and the second connecting rod (2) is rotationally connected with the supporting rod (5).

8. Support unit, characterized in that Comprising: a supporting rod (5); a plurality of connecting devices as claimed in any one of claims 1 to 7, which are spaced apart and provided on the supporting rod (5) and connected with the display device.

9. The support unit according to claim 8, characterized in that The supporting unit comprises: a first connector (8) provided on one end of the supporting rod (5); a second connector (9) provided on the other end of the supporting rod (5) and plug-in fixedly connected with the first connector (8).

10. A windbreak, characterised in that For fixedly installing a display device, comprising: A plurality of support units as claimed in claim 8 or 9, the plurality of support units being sequentially spliced and fixedly connected with the display device.

Images