Maintenance mechanism

Abstract

The invention discloses a maintenance mechanism which comprises a fixing seat, a connecting rod assembly and a loading seat, and the fixing seat is used for being installed on an adjacent display screen box body of a display screen box body to be maintained; the connecting rod assembly comprises at least two connecting rods rotationally connected in sequence, and one end of the connecting rod assembly is rotationally connected with the fixing base. The end, away from the fixing base, of the connecting rod assembly is rotationally connected with the loading base. The loading base is used for being connected with a to-be-maintained display screen box. The connecting rod assembly can be operated so that the display screen box body to be maintained can move towards the front side direction and / or the rear side direction of the display screen box body. When the display screen box body to be maintained needs to be maintained, the maintenance mechanism can bear the display screen box body to be maintained, so that the display screen box body to be maintained can be conveniently transferred to a required position for maintenance. And after the display screen box body to be maintained is maintained, the maintenance mechanism can also conveniently transfer the display screen box body to be maintained to an initial position for reuse.

Description

Technical Field

[0001] The present invention relates to the technical field of display screens, and in particular to a maintenance mechanism. Background Art

[0002] In the related art, large-screen display devices are typically composed of multiple display cabinets. If maintenance is required on a portion of these display cabinets, workers are typically required to dismantle the connecting structures surrounding the display cabinets to be maintained. After dismantling the connecting structures surrounding the display cabinets to be maintained, workers can remove the display cabinets to be maintained from the large-screen display device, thereby facilitating repairs on the display cabinets to be maintained. However, due to the heavy weight of the display cabinets to be maintained, the work intensity of the workers involved in repairing the display cabinets is relatively high. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention proposes a maintenance mechanism to facilitate the maintenance of a display screen box to be maintained.

[0004] In a first aspect, an embodiment of the present application provides a maintenance mechanism, including:

[0005] A fixing base, used for being installed on a display screen box adjacent to the display screen box to be maintained;

[0006] A connecting rod assembly comprising at least two connecting rods rotatably connected in sequence, one end of the connecting rod assembly being rotatably connected to the fixing seat;

[0007] A loading seat, wherein one end of the connecting rod assembly away from the fixing seat is rotatably connected to the loading seat, and the loading seat is used to be connected to the display screen box to be maintained;

[0008] The connecting rod assembly can be operated to enable the display screen box to be maintained to move toward the front side and / or the rear side thereof.

[0009] According to some embodiments of the present invention, each rotation position of the connecting rod assembly is provided with a parallel first rotation axis, and each first rotation axis is arranged parallel to the plane where the display screen box to be maintained is located.

[0010] According to some embodiments of the present invention, there are at least two connecting rod assemblies, and the ends of each connecting rod assembly are respectively provided with the fixing seat. Each connecting rod assembly is rotatably connected to the same loading seat, and the first rotating axes of the two connecting rod assemblies are not arranged in parallel.

[0011] According to some embodiments of the present invention, the connecting rod assembly includes a first connecting rod and a second connecting rod that are rotatably connected, the first connecting rod is rotatably connected to the fixing seat, and the second connecting rod is rotatably connected to the loading seat;

[0012] The maintenance mechanism further includes a first retaining component, wherein the first retaining component is used to maintain a rotation angle of the first connecting rod relative to the fixing seat.

[0013] According to some embodiments of the present invention, the first retaining assembly comprises:

[0014] a positioning pin, slidably disposed on one of the fixing seat and the first connecting rod, the other of which is provided with a first positioning hole for inserting the positioning pin;

[0015] An elastic member is used to keep the positioning pin inserted in the first positioning hole.

[0016] According to some embodiments of the present invention, the maintenance mechanism further comprises a connecting joint, wherein one end of each of the link assemblies away from the fixing seat is rotatably connected to the connecting joint, and the loading seat is rotatably connected to the connecting joint via a second rotating shaft, and the second rotating shaft is arranged parallel to the plane where the display screen box to be maintained is located;

[0017] The maintenance mechanism also includes a second holding component, and the second holding component is used to maintain the rotation angle of the loading seat relative to the connecting joint.

[0018] According to some embodiments of the present invention, the maintenance mechanism further comprises:

[0019] a first locking handwheel, rotatably disposed on the fixing seat, wherein the first locking handwheel is provided with a first screw threadedly connected to the display screen box;

[0020] The second locking hand wheel is rotatably arranged on the loading seat, and the second locking hand wheel is provided with a second screw which is threadedly connected with the display screen box.

[0021] According to some embodiments of the present invention, the loading base is movably provided with a latch for plugging and connecting with the display screen box to be maintained.

[0022] According to some embodiments of the present invention, the latch is threadedly connected to the loading seat.

[0023] According to some embodiments of the present invention, the maintenance mechanism further comprises a rotating hand wheel rotatably disposed on the loading seat, wherein the rotating hand wheel is engaged with a tail portion of the latch.

[0024] As can be seen from the above technical solution, the embodiments of the present application have the following advantages: When the display screen cabinet requires maintenance, the maintenance mechanism can carry the display screen cabinet, thereby conveniently moving the display screen cabinet to the required location for repair. After the maintenance of the display screen cabinet is completed, the maintenance mechanism can also conveniently move the display screen cabinet to its original location for reuse. Compared to the laborious process of transporting the display screen cabinet, the maintenance mechanism facilitates the maintenance of the display screen cabinet, reducing the workload of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the overall structure of a maintenance mechanism according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic structural diagram of a first connecting rod and a fixing seat according to an embodiment of the present invention;

[0027] Figure 3 This is a structural schematic diagram of a loading base, a second locking wheel, and a rotating hand wheel according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic structural diagram of a rotary handle and a latch according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic structural diagram of a first working state of a maintenance mechanism according to an embodiment of the present invention;

[0030] Figure 6 A schematic structural diagram of a second working state of the maintenance mechanism according to an embodiment of the present invention;

[0031] Figure 7 Schematic diagram of the third working state structure of the maintenance mechanism according to an embodiment of the present invention;

[0032] Figure 8 Schematic diagram of the fourth working state structure of the maintenance mechanism according to an embodiment of the present invention;

[0033] Figure 9 This is a structural diagram of the fifth working state of the maintenance mechanism according to an embodiment of the present invention.

[0034] The meanings of the reference numerals are as follows:

[0035] 10. Display device; 11. Display screen cabinet;

[0036] 100, fixing seat; 11, lug; 111, arc hole; 112, positioning hole; 200, connecting rod assembly; 210, first connecting rod; 220, second connecting rod; 230, first rotating shaft; 300, loading seat; 310, guide sleeve; 320, latch; 321, second tooth portion; 400, first retaining assembly; 410, positioning pin; 420, elastic member; 500, connecting joint; 510, extension arm; 520, second rotating shaft; 600, first locking handwheel; 700, second locking handwheel; 710, second screw; 800, rotating handwheel; 810, annular periphery; 811, first tooth portion; 900, second retaining assembly. DETAILED DESCRIPTION

[0037] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0038] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, upper, lower, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In the description of the present invention, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0041] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0042] The present invention will be further described in detail below with reference to the accompanying drawings.

[0043] See also Figure 1 and Figure 5 , a maintenance mechanism provided by an embodiment of the present invention, is used to assist in the maintenance of a display screen box 11. The maintenance mechanism includes a fixing seat 100, a connecting rod assembly 200 and a loading seat 300. The fixing seat 100 is used to be installed on a display screen box 11 adjacent to the display screen box 11 to be maintained; the connecting rod assembly 200 includes at least two connecting rods that are rotatably connected in sequence, and one end of the connecting rod assembly 200 is rotatably connected to the fixing seat 100; the end of the connecting rod assembly 200 away from the fixing seat 100 is rotatably connected to the loading seat 300, and the loading seat 300 is used to be connected to the display screen box 11 to be maintained; wherein, the connecting rod assembly 200 can be operated to enable the display screen box 11 to be maintained to move toward its front side and / or rear side.

[0044] In specific applications, the fixing base 100 is fixedly installed on the other display screen boxes 11 of the display screen box 11 to be maintained, for example, the fixing base 100 is fixedly installed on the back of the adjacent display screen box 11 of the display screen box 11 to be maintained, and the loading base 300 is fixedly installed on the back of the display screen box 11 to be maintained. Then, the fixing structure corresponding to the display screen box 11 to be maintained is disassembled. If it is necessary to perform front maintenance on the display screen box 11 to be maintained, the staff can push the connecting rod assembly 200 toward the front side of the display screen box 11 to be maintained, so that the various joint positions of the connecting rod assembly 200 rotate forward, and the loading base 300 moves toward the front side of the display device 10, thereby driving the display screen box 11 to be maintained to move toward the front side of the display device 10, so as to facilitate the maintenance of the display screen box 11 to be maintained (refer to Figure 5 and Figure 6); If it is necessary to perform rear maintenance on the display screen box 11 to be maintained, the staff can pull the connecting rod assembly 200 toward the rear side of the display screen box 11 to be maintained, so that the various joint positions of the connecting rod assembly 200 rotate backward, and the loading seat 300 moves toward the rear side of the display device 10, thereby driving the display screen box 11 to be maintained to move toward the rear side of the display device 10, so as to facilitate the maintenance of the display screen box 11 to be maintained (refer to Figure 5 and Figure 9 In other possible application forms, the display screen box 11 to be maintained can also be moved toward the front side of the display device 10 to adjust its posture. The adjusted display device 10 moves toward the rear side of the display device 10 to facilitate the staff to repair the display screen box 11 to be maintained at the rear side of the display device 10. When the display screen box 11 to be maintained is maintained, the staff controls the connecting rod assembly 200 to transfer the display screen box 11 to be maintained to the corresponding position of the display device 10 for reuse (refer to 5 to Figure 9 ).

[0045] As can be seen from the above, when the display screen housing 11 requires maintenance, the maintenance mechanism can carry the display screen housing 11, thereby conveniently moving the display screen housing 11 to the desired location for repair. After the maintenance of the display screen housing 11 is completed, the maintenance mechanism can also conveniently move the display screen housing 11 to its original location for reuse. Compared to the laborious process of transporting the display screen housing 11, the maintenance mechanism facilitates maintenance of the display screen housing 11, reducing the workload of the staff.

[0046] In some embodiments, see Figures 1 to 2 Each rotation position of the connecting rod assembly 200 is provided with a parallel first rotating shaft 230, and the first rotating shaft 230 is arranged parallel to the plane where the display screen housing 11 to be maintained is located. For example, the connecting rod assembly 200 includes two connecting rods, namely a first connecting rod 210 and a second connecting rod 220. The first connecting rod 210 is rotatably connected to the fixing base 100 via a first rotating shaft 230, the first connecting rod 210 is rotatably connected to the second connecting rod 220 via a first rotating shaft 230, and the third connecting rod is rotatably connected to the loading base 300 via a first rotating shaft 230. The three rotating shafts are arranged in parallel and are also arranged parallel to the plane where the display screen housing 11 to be maintained is located.

[0047] It can be understood that the first rotating shaft 230 of each rotating position of the connecting rod assembly 200 is arranged parallel to the plane where the display screen box 11 is located. With this arrangement, the staff can conveniently control the transfer of the box to be maintained toward the front and rear directions of the display device 10 by rotating the first connecting rod 210 relative to the fixed base 100, the second connecting rod 220 relative to the first connecting rod 210, and the loading base 300 relative to the second connecting rod 220, thereby facilitating the maintenance of the box to be maintained.

[0048] In other possible embodiments, the connecting rod assembly 200 may also be formed by three or more connecting rods that are rotatably connected in sequence, which will not be described in detail.

[0049] In some embodiments, see Figures 1 to 2 There are at least two connecting rod assemblies 200, and a fixing seat 100 is provided at the end of each connecting rod assembly 200. Each connecting rod assembly 200 is rotatably connected to the same loading seat 300, and the first rotating shafts 230 of the two connecting rod assemblies 200 are not arranged in parallel.

[0050] For example, two connecting rod assemblies 200 are provided, and the fixing bases 100 of the two connecting rod assemblies 200 are respectively fixed to two adjacent display screen boxes 11 of the display screen boxes 11 to be maintained. In use, the first rotation axes 230 of the two connecting rod assemblies 200 are not arranged in parallel, that is, one connecting rod assembly 200 allows movement in one plane, and the other connecting rod assembly 200 allows movement in another plane. The two connecting rod assemblies 200 are both connected to the same loading base 300. Therefore, the movement planes of the two connecting rod assemblies 200 intersect, thereby allowing the loading base 300 to move linearly in the front-to-back direction of the display device 10, thereby conveniently controlling the front-to-back movement of the display screen boxes 11 to be maintained toward the display device 10.

[0051] In some embodiments, see Figures 1 to 2 The maintenance mechanism further includes a first retaining assembly 400, which is used to maintain the rotation angle of the first connecting rod 210 relative to the fixing base 100. For example, the first retaining assembly 400 is disposed on the fixing base 100 and connected to the first connecting rod 210, thereby maintaining the angle of the first connecting rod 210 relative to the fixing base 100; or the first retaining assembly 400 is disposed on the first connecting rod 210 and connected to the fixing base 100, thereby maintaining the angle of the first connecting rod 210 relative to the fixing base 100.

[0052] It is understood that when the display screen housing 11 to be maintained is moved to the desired position, the first retaining assembly 400 locks the rotation angle of the first connecting rod 210 relative to the fixing base 100. At this time, although the two second connecting rods 220 can rotate, the movement directions of the two second connecting rods 220 interfere with each other. Therefore, the loading base 300 remains in the corresponding position, thereby maintaining the display screen housing 11 to be maintained in the corresponding position. Therefore, the staff only needs to control the first retaining assembly 400 to lock the display screen housing 11 to be maintained, thereby facilitating maintenance or angle adjustment of the display screen housing 11 to be maintained.

[0053] Instead of the first retaining assembly 400 being provided on the fixing base 100, in other possible embodiments, the first retaining assembly 400 is used to maintain the rotational angle between the first connecting rod 210 and the second connecting rod 220. In this configuration, the first retaining assembly 400 can also maintain the position of the display screen housing 11 to be maintained, thereby facilitating maintenance of the display screen housing 11 to be maintained.

[0054] In some embodiments, see Figures 1 to 2 The first retaining assembly 400 includes a positioning pin 410 and an elastic member 420. Specifically, two lugs 11 are provided on the fixing base 100, and the end of the first connecting rod 210 is rotatably connected between the two lugs 11 through the first rotating shaft 230. Among them, a circular arc hole 111 is provided on one lug 11 with the first rotating shaft 230 as the center, and at least two positioning holes 112 are provided on the other lug 11. The positioning pin 410 is slidably inserted into the end of the first connecting rod 210, one end of the positioning pin 410 is inserted into the circular arc hole 111, and the other end is inserted into the positioning hole 112. The elastic member 420 is sleeved on the outside of the positioning pin 410, and one end of the elastic member 420 close to the plug-in hole is in contact with the axis of the positioning pin 410, and the other end is in contact with the inner wall of the first connecting rod 210. As a result, the elastic member 420 applies a force toward the positioning hole 112 to the positioning pin 410, so that the positioning pin 410 is inserted into the positioning hole 112.

[0055] It can be understood that when the first link 210 needs to be rotated, the staff pushes the positioning pin 410 to separate from the positioning hole 112, so that the positioning pin 410 releases the restriction on the first link 210, and the first link 210 can be rotated in any direction; when the first link 210 is rotated, the staff releases the restriction on the positioning pin 410, and the positioning pin 410 is inserted into the corresponding positioning hole 112 under the action of the elastic member 420, thereby limiting the rotation of the first link 210, and then maintaining the position of the maintenance box.

[0056] In some embodiments, see Figures 1 to 3The maintenance mechanism also includes a connecting joint 500. The end of each connecting rod assembly 200 away from the fixing base 100 is rotatably connected to the connecting joint 500. The loading base 300 is rotatably connected to the connecting joint 500 via a second rotating shaft 520. The second rotating shaft 520 is arranged parallel to the plane where the display screen box 11 to be maintained is located. Specifically, three extension arms 510 extend from the four sides of the connecting joint 500. The connecting rod assembly 200 is provided with two. The second connecting rods 220 of the two connecting rod assemblies 200 are rotatably connected to two of the extension arms 510. The loading base 300 is rotatably connected to the other extension arm 510 via the second rotating shaft 520. The second rotating shaft 520 is not arranged parallel to the first rotating shaft 230. The second rotating shaft 520 is arranged parallel to the plane where the display screen box 11 to be maintained is located.

[0057] It can be understood that when the display screen box 11 to be maintained is being repaired, the staff can flexibly adjust the angle of the display screen box 11 to be maintained, so that the display screen box 11 to be maintained is adjusted to the required angle, thereby facilitating the maintenance of the display screen box 11 to be maintained; and, when the display screen box 11 to be maintained needs to be transferred from the front position of the display device 10 to the rear position of the display device 10, the staff can adjust the display screen box 11 to be maintained to the required posture, such as adjusting the display screen box 11 to be maintained to a vertical posture relative to the display device 10, so that the display screen box 11 to be maintained can be conveniently transferred from the front position of the display device 10, through the display device 10 to the rear position of the display device 10.

[0058] Furthermore, the maintenance mechanism includes a second retaining assembly 900. The structure of the second retaining assembly 900 is substantially identical to that of the first retaining assembly 400, and will not be described in detail. In use, after the angle of the display screen housing 11 to be maintained is adjusted, the second retaining assembly 900 locks the position of the loading base 300 relative to the second connecting rod 220, thereby maintaining the position of the display screen housing 11 to be maintained.

[0059] In some embodiments, see Figure 1 and Figure 3 The maintenance mechanism further includes a first locking handwheel 600, which is provided with a first screw that is rotatably inserted into the fixing base 100. The end of the first screw is used to be threadedly connected to the back of the display box 11, thereby fixing the fixing base 100 to the back of the display box 11. Similarly, the maintenance mechanism further includes a second locking handwheel 700, which is provided with a second screw 710 that is inserted into the loading base 300. The end of the second screw 710 is used to be threadedly connected to the back of the display box 11 to be maintained, thereby fixing the loading base 300 to the back of the display box 11.

[0060] It is understood that the display screen box 11 to be maintained and the second locking hand wheel 700 adopt the above-mentioned structural form, and the display screen box 11 to be maintained can be adjusted to a corresponding angle at will to facilitate the maintenance of the display screen box 11 to be maintained; and when it is necessary to move the display screen box 11 to be maintained from the front side of the display device 10 to the rear side of the display device 10, the staff can rotate the display screen box 11 to be maintained to 45 degrees. After the display screen box 11 to be maintained is rotated 45 degrees, it is then rotated around the second rotation axis 520 to adjust the posture of the display screen box 11 to be maintained, so that the display screen box 11 to be maintained can be more smoothly moved from the front side of the display device 10 to the rear side of the display device 10.

[0061] In order to keep the display screen box 11 to be maintained in the position after rotation adjustment, in some embodiments, refer to Figure 1 、 Figure 3 and Figure 4 The loading seat 300 is movably provided with a pin 320 which is plugged into the display screen box 11 to be maintained. A socket is provided on the back side of the display screen box 11 to be maintained. The pin 320 is used to be inserted into the back side of the display screen box 11 to be maintained, thereby limiting the rotation of the display screen box 11 to be maintained, and thus maintaining the position of the display screen box 11 to be maintained.

[0062] Furthermore, the latch 320 is threadedly connected to the loading base 300. It will be appreciated that the latch 320 is threadedly connected to the loading base 300. This arrangement allows the latch 320 to remain inserted into the receptacle after position adjustment, thereby maintaining the position of the display screen housing 11 to be maintained. Alternatively, an elastic structure such as a spring may be employed, acting on the latch 320 to maintain the latch 320 inserted into the receptacle on the back side of the display screen housing 11 to be maintained.

[0063] Furthermore, the maintenance mechanism includes a rotating handwheel 800 rotatably mounted on the loading base 300. The rotating handwheel 800 engages with the tail of the latch 320 to drive the latch 320 to slide axially. Specifically, a guide sleeve 310 is provided on the back of the loading base 300. The second screw 710 of the second locking handwheel 700 is rotatably mounted through the guide sleeve 310 and is threadedly connected to the back of the display screen housing 11 to be maintained. The rotating handwheel 800 is rotatably mounted on the guide sleeve 310 and is located between the loading base 300 and the second locking handwheel 700. The rotating handwheel 800 has an annular periphery 810 around its periphery. The inner wall of the annular periphery 810 has a first tooth portion 811. The tail of the latch 320 has a second tooth portion 321, and the first tooth portion 811 engages with the second tooth portion 321. It can be understood that when the staff rotates the rotating handwheel 800, the rotating handwheel 800 engages with the second tooth portion 321 through the first tooth portion 811 to drive the pin 320 to rotate, and the pin 320 is threadedly connected to the loading seat 300, so that the pin 320 is plugged into or separated from the socket on the back of the display screen box 11 to be maintained.

[0064] The technical means disclosed in the solutions of the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A maintenance mechanism, characterized in that: Used for maintenance of the display cabinet, the maintenance mechanism includes: A fixing base, used for being installed on a display screen box adjacent to the display screen box to be maintained; A connecting rod assembly comprising at least two connecting rods rotatably connected in sequence, one end of the connecting rod assembly being rotatably connected to the fixing seat; A loading seat, wherein one end of the connecting rod assembly away from the fixing seat is rotatably connected to the loading seat, and the loading seat is used to be connected to the display screen box to be maintained; The connecting rod assembly can be operated to enable the display screen box to be maintained to move toward the front side and / or the rear side thereof.

2. The maintenance mechanism according to claim 1, characterized in that: Each rotation position of the connecting rod assembly is provided with a parallel first rotating shaft, and each first rotating shaft is arranged parallel to the plane where the display screen box to be maintained is located.

3. The maintenance mechanism according to claim 2, characterized in that: There are at least two connecting rod assemblies, and the ends of each connecting rod assembly are respectively provided with the fixing seat. Each connecting rod assembly is rotatably connected to the same loading seat, and the first rotating shafts of the two connecting rod assemblies are not arranged in parallel.

4. The maintenance mechanism according to claim 3, characterized in that: The connecting rod assembly includes a first connecting rod and a second connecting rod that are rotatably connected, the first connecting rod is rotatably connected to the fixing seat, and the second connecting rod is rotatably connected to the loading seat; The maintenance mechanism further includes a first retaining assembly, the first retaining member being used to maintain a rotation angle of the first connecting rod relative to the fixing seat; or the first retaining assembly being used to maintain a rotation angle between the first connecting rod and the second connecting rod.

5. The maintenance mechanism according to claim 4, characterized in that: The first retaining assembly comprises: a positioning pin, slidably disposed on one of the fixing seat and the first connecting rod, the other of which is provided with a first positioning hole for inserting the positioning pin; An elastic member is used to keep the positioning pin inserted in the first positioning hole.

6. The maintenance mechanism according to claim 3, characterized in that: The maintenance mechanism further includes a connecting joint, wherein one end of each connecting rod assembly away from the fixing seat is rotatably connected to the connecting joint, and the loading seat is rotatably connected to the connecting joint via a second rotating shaft, and the second rotating shaft is arranged parallel to the plane where the display screen box to be maintained is located; The maintenance mechanism further includes a second holding assembly, which is used to maintain a rotation angle of the loading seat relative to the connecting joint.

7. The maintenance mechanism according to claim 1, characterized in that: The maintenance mechanism also includes: a first locking handwheel, rotatably disposed on the fixing seat, wherein the first locking handwheel is provided with a first screw threadedly connected to the display screen box; The second locking hand wheel is rotatably arranged on the loading seat, and the second locking hand wheel is provided with a second screw which is threadedly connected with the display screen box.

8. The maintenance mechanism according to any one of claims 1 to 7, characterized in that: The loading seat is movably provided with a latch which is plug-connected with the display screen box to be maintained.

9. The maintenance mechanism according to claim 8, characterized in that: The latch is threadedly connected to the loading seat.

10. The maintenance mechanism according to claim 9, characterized in that: The maintenance mechanism further comprises a rotating hand wheel rotatably arranged on the loading seat, and the rotating hand wheel is engaged with the tail of the latch.

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