Sliding assembly and multimedia device

Abstract

The application discloses a sliding assembly and a multimedia device. The sliding assembly comprises a mounting frame, a sliding structure and a plurality of universal balls. The mounting frame is fixedly arranged. The sliding structure is slidably connected to the mounting frame and can slide transversely relative to the mounting frame. The plurality of universal balls are arranged at the sliding connection position of the sliding structure or the mounting frame. The mounting frame has one or more supporting portions capable of supporting the sliding structure in a vertical plane and one or more limiting portions capable of limiting the sliding structure in a horizontal plane. The supporting portions and the limiting portions are slidably connected to the sliding structure through the corresponding universal balls. The supporting portions provide a supporting force for the sliding structure, and the limiting portions provide a limiting force for the sliding structure. In the horizontal direction and the vertical direction, the supporting force, the limiting force and the gravity of the sliding structure are balanced. The embodiment of the application has the beneficial effect that the sliding between the sliding structure and the mounting frame is smoother, and the sliding structure is not prone to being stuck or bitten by the track due to the torque.

Description

Technical Field

[0001] The present application relates to the technical field of multimedia devices, and in particular to a sliding component and a multimedia device. Background Art

[0002] In related technical fields, sliding blackboards (or whiteboards, or greenboards) are often used in classrooms, conferences, and other settings. These sliding structures typically utilize a concave pulley (or track wheel) that slides in a one-dimensional linear motion on a fixed convex track. Their basic design features are similar to the sliding mechanism of aluminum alloy doors and windows.

[0003] However, when the mass of the sliding structure is large and the eccentricity is large, gravity and eccentricity together form a lateral torque, which causes lateral pressure between the pulley and the track. The friction resistance increases significantly, and jamming and rail gnawing may occur. In severe cases, the track may become stuck and unable to slide. Summary of the Invention

[0004] The embodiments of the present application provide a sliding assembly and a multimedia device, which have the beneficial effect of making the sliding between the sliding structure and the mounting frame smoother and less prone to jamming and rail gnawing due to torque.

[0005] In a first aspect, an embodiment of the present application provides a sliding assembly, comprising a mounting frame, a sliding structure, and a plurality of universal ball bearings; the mounting frame is fixedly arranged; the sliding structure is slidably connected to the mounting frame, and the sliding structure can slide laterally relative to the mounting frame; and the plurality of universal ball bearings are installed at the sliding connection positions of the sliding structure and / or the mounting frame;

[0006] In which, the mounting frame has one or more supporting parts that can support the sliding structure in a vertical plane and one or more limiting parts that can limit the sliding structure in a horizontal plane, the supporting parts and the limiting parts are both slidably connected to the sliding structure through the corresponding universal ball bearings, the supporting parts provide a supporting force for the sliding structure, and the limiting parts provide a limiting force for the sliding structure, when the sliding structure is relatively stationary relative to the mounting frame, the supporting force, the limiting force and the gravity of the sliding structure are balanced; different positions of the sliding structure are respectively slidably connected to the supporting parts and the limiting parts through the universal ball bearings.

[0007] In some embodiments, the universal ball is installed on the sliding structure, and the sliding structure includes a plate-like body, a first connecting part and a second connecting part, the first connecting part is arranged at the bottom of the plate-like body; the second connecting part is arranged at the top of the plate-like body; the first connecting part or the second connecting part is slidably connected to the supporting part through the universal ball; at least one of the first connecting part and the second connecting part is slidably connected to the limiting part through the universal ball.

[0008] In some embodiments, the first connection portion is slidably connected to the support portion via the universal ball, and two limiting portions are provided, comprising a first limiting portion and a second limiting portion, the first limiting portion being adapted to the first connection portion, and the second limiting portion being adapted to the second connection portion, and the acting forces of the first limiting portion and the second limiting portion are in opposite directions;

[0009] The first connecting portion has a first supporting surface arranged horizontally, the universal ball is arranged on the first supporting surface, and the first supporting surface is supported on the supporting portion through the universal ball;

[0010] The side of the first connecting portion facing away from the plate-shaped body has a vertically arranged first limiting surface, the first limiting surface is provided with the universal ball, and the first limiting surface abuts against the first limiting portion through the universal ball;

[0011] The second connecting portion has a vertical portion, and the vertical portion has a second limiting surface on a side surface close to the plate-shaped body. The universal ball is provided on the second limiting surface, and the second limiting surface abuts against the second limiting portion through the universal ball.

[0012] In some embodiments, the second connection portion is slidably connected to the support portion via the universal ball, and two limiting portions are provided, including a first limiting portion and a second limiting portion, the first limiting portion is adapted to the first connection portion, and the second limiting portion is adapted to the second connection portion, and the acting forces of the first limiting portion and the second limiting portion are in opposite directions;

[0013] The side of the first connecting portion facing away from the plate-shaped body has a vertically arranged first limiting surface, the first limiting surface is provided with the universal ball, and the first limiting surface abuts against the first limiting portion through the universal ball;

[0014] The second connecting portion is partially vertically arranged, and the vertical portion has a second limiting surface close to the side surface of the plate-shaped body, the second limiting surface is provided with the universal ball, and the second limiting surface abuts against the second limiting portion through the universal ball;

[0015] A horizontally arranged second supporting surface is provided below the vertical portion of the second connecting portion, the universal ball is provided on the second supporting surface, and the second supporting surface is supported on the supporting portion through the universal ball.

[0016] In some embodiments, the first connecting portion includes a first connecting plate, the first connecting plate is connected to the plate-shaped body, and the first connecting plate extends toward a side away from the plate-shaped body;

[0017] The lower surface of the first connecting plate is a first supporting surface, and the side of the first connecting plate facing away from the plate-shaped body is a first limiting surface;

[0018] The second connecting portion includes a transition plate and a second connecting plate, wherein a first side of the transition plate is connected to the plate-shaped body; the second connecting plate is connected to a second side of the transition plate, and the second connecting plate is arranged at an angle to the transition plate and extends in a vertical downward direction;

[0019] The lower surface of the second connecting plate is a second supporting surface, and the side of the second connecting plate close to the plate-shaped body is a second limiting surface;

[0020] Wherein, the first supporting surface or the second supporting surface is slidably connected to the supporting portion via the universal ball; and at least one of the first limiting surface and the second limiting surface is slidably connected to the limiting portion via the universal ball.

[0021] In some embodiments, the plane on which the support portion and the sliding structure slide relative to each other is a curved surface and forms a sliding groove, one of the first connecting portion or the second connecting portion is adapted to the sliding groove, and the other is adapted to the limiting portion.

[0022] In some embodiments, the first connecting portion is adapted to the slide groove, and the first connecting portion includes a first extending portion extending obliquely downward in a direction away from the plate-shaped body, an end portion of the first extending portion is adapted to the slide groove, and at least two universal ball bearings are provided on the end portion of the first extending portion;

[0023] The second connecting portion includes a transition plate and a second connecting plate, the first side of the transition plate is connected to the plate-shaped main body; the second connecting plate is connected to the second side of the transition plate, the second connecting plate is set at an angle to the transition plate and extends in a vertical downward direction, and the side of the second connecting plate close to the plate-shaped main body is a second limiting surface, and the second limiting surface is adapted to the limiting portion.

[0024] In some embodiments, the first connecting portion includes a first connecting plate, the first connecting plate being connected to the plate-shaped body, the first connecting plate extending toward a side away from the plate-shaped body, the side of the first connecting plate away from the plate-shaped body being a first limiting surface, and the first limiting surface being adapted to the limiting portion;

[0025] The second connecting portion is adapted to the slide groove, and the second connecting portion includes a second extension portion extending obliquely downward in a direction close to the plate-like body, the end portion of the second extension portion is adapted to the slide groove, and at least two universal ball bearings are provided on the end portion of the second extension portion.

[0026] In some embodiments, along the sliding direction of the sliding structure, one universal ball is provided on each of the opposite sides of the surface on which the universal ball is mounted, or at least two universal balls are arranged on each surface on which the universal ball is mounted.

[0027] On the second aspect, an embodiment of the present application provides a multimedia device, including a sliding assembly as described above. Based on the sliding assembly of the embodiment of the present application, the mounting frame is used to carry the sliding structure, and the sliding structure can move relative to the mounting frame. The universal ball can reduce the friction between the sliding structure and the mounting frame, so that the relative sliding between the sliding structure and the mounting frame is smoother. The sliding structure can slide laterally relative to the mounting frame, and the mounting frame has one or more support parts that can support the sliding structure, specifically supporting the sliding structure in a vertical plane, that is, the support part can directly or indirectly overcome the weight of the sliding structure, and the support part can specifically be an oblique support or a vertical upward support; the mounting frame also has one or more limiting parts that can limit the sliding structure in a horizontal plane, and the limiting part can limit part of the structure of the sliding structure to a certain vertical plane, reducing the possibility of the sliding structure flipping or tipping over. The supporting portion and the limiting portion are both slidably connected to the sliding structure through the corresponding universal ball bearings, which can reduce the friction between the sliding structure and the mounting frame, making the relative sliding smoother. Compared with the connection method of the pulley structure in the prior art, no eccentric torque is generated due to gravity or deflection, and the universal ball bearings reduce or eliminate the eccentric torque by sliding in the corresponding direction. After the eccentric sliding, the universal ball bearings can still ensure the lateral sliding between the sliding structure and the mounting frame, making the relative sliding smoother and less prone to jamming or gnawing on the rails. The supporting portion can provide a supporting force for the sliding structure, and the limiting portion can provide a limiting force for the sliding structure. When the sliding structure is relatively stationary relative to the mounting frame, the supporting force, the limiting force and the gravity of the sliding structure are relatively balanced. The embodiments of the present application have the beneficial effect of making the sliding between the sliding structure and the mounting frame smoother and less prone to jamming or gnawing on the rails due to torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a perspective structural diagram of the connection between the mounting bracket and the sliding structure of the sliding assembly in one embodiment of the present application;

[0030] Figure 2 This is a structural diagram of a universal ball in an embodiment of the present application when it is installed in a sliding structure and is in a first mating position;

[0031] Figure 3 This is a structural diagram of a universal ball in an embodiment of the present application when it is installed in a sliding structure and is in a second mating position;

[0032] Figure 4 This is a structural diagram of an embodiment of the present application in which a universal ball is installed on a mounting frame and a sliding structure and is in a first mating position;

[0033] Figure 5 This is a structural diagram of an embodiment of the present application in which the universal ball is installed on the mounting frame and the sliding structure and is in the second mating position;

[0034] Figure 6 This is a structural diagram of a universal ball in an embodiment of the present application when it is installed on a mounting frame and is in a first mating position;

[0035] Figure 7 This is a structural diagram of a universal ball roller in an embodiment of the present application when it is installed on a mounting frame and is in a second mating position;

[0036] Figure 8 This is a structural diagram of the first embodiment of the present application when the mounting frame and the sliding structure are connected;

[0037] Figure 9 This is a schematic diagram of the forces acting on the various parts when the mounting frame and the sliding structure are connected in the first embodiment of the present application;

[0038] Figure 10 This is a structural diagram of the second embodiment of the present application when the mounting frame and the sliding structure are connected;

[0039] Figure 11 This is a schematic diagram of the forces acting on the various parts when the mounting frame and the sliding structure are connected in the second embodiment of the present application;

[0040] Figure 12 This is a structural diagram of the third embodiment of the present application when the mounting frame and the sliding structure are connected;

[0041] Figure 13 This is a schematic diagram of the forces acting on the various parts when the mounting frame and the sliding structure are connected in the third embodiment of the present application;

[0042] Figure 14 This is a structural diagram of the fourth embodiment of the present application when the mounting frame and the sliding structure are connected;

[0043] Figure 15 This is a schematic diagram of the forces acting on the various parts of the mounting frame and the sliding structure when they are connected in the fourth embodiment of the present application;

[0044] Figure 16 This is a structural diagram of the fifth embodiment of the present application when the mounting frame and the sliding structure are connected;

[0045] Figure 17 This is a structural diagram of the sixth embodiment of the present application when the mounting frame and the sliding structure are connected;

[0046] Reference numerals:

[0047] 100. Mounting frame; 110. Support portion; 111. Slide groove; 120. Limiting portion; 121. First limiting portion; 122. Second limiting portion; 200. Sliding structure; 210. Plate-shaped body; 220. First connecting portion; 221. First connecting plate; 222. First extension portion; 223. First supporting surface; 224. First limiting surface; 230. Second connecting portion; 231. Transition plate; 232. Second connecting plate; 233. Second extension portion; 234. Second supporting surface; 235. Second limiting surface; 300. Universal ball bearing. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0049] Please refer to Figures 1-17 As shown, the first aspect of the present application proposes a sliding assembly, which has the beneficial effect of making the sliding between the sliding structure 200 and the mounting frame 100 smoother and less prone to jamming and rail gnawing due to torque.

[0050] Reference Figures 1 to 7In some embodiments of the present application, the sliding assembly includes a mounting frame 100, a sliding structure 200, and a plurality of universal ball bearings 300; the mounting frame 100 is fixed; the sliding structure 200 is slidably connected to the mounting frame 100, and the sliding structure 200 can slide laterally relative to the mounting frame 100; the plurality of universal ball bearings 300 are installed at the sliding connection position of the sliding structure 200 and / or the mounting frame 100;

[0051] In which, the mounting frame 100 has one or more supporting parts 110 that can support the sliding structure 200 in a vertical plane and one or more limiting parts 120 that can limit the sliding structure 200 in a horizontal plane. The supporting part 110 and the limiting part 120 are both slidably connected to the sliding structure 200 through the corresponding universal ball 300. The supporting part 110 provides a supporting force for the sliding structure 200, and the limiting part 120 provides a limiting force for the sliding structure 200. When the sliding structure 200 is relatively stationary relative to the mounting frame 100, the supporting force, the limiting force and the gravity of the sliding structure 200 are balanced; different positions of the sliding structure 200 are slidably connected to the supporting part 110 and the limiting part 120 through the universal ball 300.

[0052] In the sliding assembly according to the embodiment of the present application, the mounting frame 100 is used to support the sliding structure 200. The sliding structure 200 can move relative to the mounting frame 100. The universal ball 300 can reduce the friction between the sliding structure 200 and the mounting frame 100, making the relative sliding between the sliding structure 200 and the mounting frame 100 smoother. The sliding structure 200 can slide laterally relative to the mounting frame 100. The mounting frame 100 has one or more support portions 110 that can support the sliding structure 200. Specifically, the support portion 110 supports the sliding structure 200 in a vertical plane. That is, the support portion 110 can directly or indirectly overcome the weight of the sliding structure 200. The support portion 110 can specifically be an oblique support or a vertical upward support. The mounting frame 100 also has one or more limiting portions 120 that can limit the sliding structure 200 in a horizontal plane. The limiting portion 120 can restrict part of the structure of the sliding structure 200 to a certain vertical plane, reducing the possibility of the sliding structure 200 flipping or tipping. The support portion 110 and the limiting portion 120 are both slidably connected to the sliding structure 200 via the corresponding universal ball 300. This reduces friction between the sliding structure 200 and the mounting frame 100, making relative sliding smoother. Compared to the pulley structure connection method in the prior art, no eccentric torque is generated due to gravity or deflection. The universal ball 300 reduces or eliminates eccentric torque by sliding in the corresponding direction. After eccentric sliding, the universal ball 300 can still ensure lateral sliding between the sliding structure 200 and the mounting frame 100, making relative sliding smoother and less prone to jamming or gnawing. The support portion 110 can provide support for the sliding structure 200, and the limiting portion 120 can provide limiting force for the sliding structure 200. When the sliding structure 200 is relatively stationary relative to the mounting frame 100, the support force, the limiting force, and the gravity of the sliding structure 200 are relatively balanced. The embodiment of the present application has the beneficial effect that the sliding between the sliding structure 200 and the mounting frame 100 is smoother and is less likely to cause jamming or gnawing of the rail due to torque.

[0053] It should be noted that the universal ball transfer 300 can be mounted on the sliding structure 200, or on the mounting frame 100, or partially on the sliding structure 200 and partially on the mounting frame 100. All sliding structures 200 are installed at the sliding connection position of the corresponding structure. Different positions of the sliding structure 200 are respectively slidably connected to the support portion 110 and the limit portion 120 via the universal ball transfer 300.

[0054] It should be noted that the sliding structure 200 can be at least one of a primary display, a secondary display, a blackboard, a whiteboard, a greenboard, and a drawing board. In other words, the sliding structure 200 can include a plate-like structure for writing, a display screen capable of displaying, a projection board capable of projection, or a plate-like structure combining multiple functions, such as a sliding structure 200 capable of simultaneously performing functions such as projection and writing.

[0055] Reference Figure 2 and Figure 3 In some embodiments of the present application, the universal ball 300 is installed on the sliding structure 200, and the sliding structure 200 includes a plate-shaped body 210, a first connecting part 220 and a second connecting part 230, the first connecting part 220 is arranged at the bottom of the plate-shaped body 210; the second connecting part 230 is arranged at the top of the plate-shaped body 210; the first connecting part 220 or the second connecting part 230 is slidingly connected to the support part 110 through the universal ball 300; at least one of the first connecting part 220 and the second connecting part 230 is slidingly connected to the limiting part 120 through the universal ball 300.

[0056] Based on the sliding assembly of the embodiment of the present application, the universal ball 300 can be installed on the sliding structure 200. In this case, the sliding structure 200 includes a plate-shaped body 210, a first connecting portion 220, and a second connecting portion 230. The plate-shaped body 210 is the main structure of the sliding structure 200 and is the part that embodies the function of the sliding structure 200. The plate-shaped body 210 can be at least one of a main screen display, a secondary screen display, a blackboard, a whiteboard, a green board, and a drawing board. The first connecting portion 220 is arranged at the bottom of the plate-shaped body 210 and is mainly used for sliding connection with the bottom of the mounting frame 100; the second connecting portion 230 is arranged at the top of the plate-shaped body 210 and is mainly used for sliding connection with the top of the mounting frame 100; the cooperation between the first connecting portion 220 and the second connecting portion 230 can realize lateral sliding between the sliding structure 200 and the mounting frame 100. The first connection part 220 or the second connection part 230 is slidably connected to the support part 110 through the universal ball 300, that is, the support part 110 can support the entire sliding structure 200 by supporting the first connection part 220, and the support part 110 can also support the entire sliding structure 200 by supporting the second connection part 230. Two support parts 110 can also be set as needed, and support the first connection part 220 and the second connection part 230 respectively; at least one of the first connection part 220 and the second connection part 230 is slidably connected to the limiting part 120 through the universal ball 300. At this time, the sliding structure 200 can be limited by the limiting part 120, so that the sliding structure 200 is not easily detached from the mounting frame 100, thereby improving the connection stability between the sliding structure 200 and the mounting frame 100. Only one limiting portion 120 may be provided, in which case the limiting portion 120 may cooperate with either the first connecting portion 220 or the second connecting portion 230. Alternatively, two limiting portions 120 may be provided, with one of the two limiting portions 120 cooperating with the first connecting portion 220 and the other cooperating with the second connecting portion 230, as long as the sliding structure 200 can be reduced or even prevented from separating from the mounting frame 100. A greater number of limiting portions 120 may also be provided as needed.

[0057] Reference Figures 2 to 7 It should be noted that the universal ball 300 can also be installed on the mounting frame 100 as needed; or part of the universal ball 300 can be installed on the mounting frame 100, and part of the universal ball 300 can be installed on the sliding structure 200. At this time, the sliding range of the sliding structure 200 can be limited by the universal ball 300 at different installation positions abutting against each other.

[0058] Reference Figure 8 and Figure 9In some embodiments of the present application, the first connection portion 220 is slidably connected to the support portion 110 via the universal ball 300. Two limiting portions 120 are provided, and the limiting portions 120 include a first limiting portion 121 and a second limiting portion 122. The first limiting portion 121 is adapted to the first connection portion 220, and the second limiting portion 122 is adapted to the second connection portion 230. The acting forces of the first limiting portion 121 and the second limiting portion 122 are in opposite directions.

[0059] The first connecting portion 220 has a first support surface 223 arranged horizontally. The universal ball 300 is arranged on the first support surface 223. The first support surface 223 is supported on the support portion 110 through the universal ball 300.

[0060] The first connection portion 220 has a vertically arranged first limiting surface 224 on the side facing away from the plate-shaped body 210. The universal ball 300 is arranged on the first limiting surface 224. The first limiting surface 224 abuts against the first limiting portion 121 through the universal ball 300.

[0061] The second connection portion 230 has a vertical portion, and the vertical portion has a second limiting surface 235 close to the side of the plate-like body 210. The universal ball 300 is provided on the second limiting surface 235, and the second limiting surface 235 abuts against the second limiting portion 122 through the universal ball 300.

[0062] Based on the sliding assembly of the embodiment of the present application, the above structure is an embodiment of the sliding structure 200 and the mounting frame 100 in the present application. In this embodiment, the support portion 110 is provided with one and supported below the first connecting portion 220, and the limiting portion 120 is provided with two, including a first limiting portion 121 and a second limiting portion 122. The first limiting portion 121 is used to limit the first connecting portion, and the second connecting portion 230 is used to limit the second connecting portion 230. When the directions of the forces acting on the first limiting portion 121 and the second limiting portion 122 are opposite, the first limiting force and the second limiting force can form a limiting torque, which can prevent the sliding structure 200 from easily separating from the mounting frame 100. The force acting on the first connecting portion 220 by the first limiting portion 121 is the first limiting force, and the force acting on the second connecting portion 230 by the second limiting portion 122 is the second limiting force. The limiting torque is opposite to the deflection torque generated during the deflection of the sliding structure 200 , so as to prevent the sliding structure 200 from being easily deflected and separated from the mounting bracket 100 .

[0063] The horizontally arranged first supporting surface 223 can be supported by the supporting part 110. After the universal ball 300 is arranged on the first supporting surface 223, the first supporting surface 223 can be supported on the supporting part 110 through the universal ball 300, thereby reducing the relative friction between the first connecting part 220 and the supporting part 110, and making the sliding structure 200 slide relative to the supporting part 110 smoother. The first limiting surface 224 arranged vertically can be limited by the first limiting part 121. After the universal ball 300 is provided on the first limiting surface 224, the first limiting surface 224 can be abutted against the first limiting part 121 through the universal ball 300, reducing the relative friction between the first connecting part 220 and the first limiting part 121, so that the sliding structure 200 slides relative to the first limiting part 121 more smoothly; the vertical part of the second connecting part 230 is close to the side of the plate-shaped main body 210 and has a second limiting surface 235. The second limiting surface 235 can be limited by the second limiting part 122. After the universal ball 300 is provided on the second limiting surface 235, the second limiting surface 235 can be abutted against the second limiting part 122 through the universal ball 300, reducing the relative friction between the second connecting part 230 and the second limiting part 122, so that the sliding structure 200 slides relative to the second limiting part 122 more smoothly.

[0064] It should be noted that the above embodiment can include six universal ball transfers 300: four at the bottom and two at the top. Of the four universal ball transfers 300 at the bottom, two are mounted on the first support surface 223, specifically at either end of the first support surface 223 relative to the sliding direction, and the other two are mounted on the first limiting surface 224, specifically at either end of the first limiting surface 224 relative to the sliding direction. The two universal ball transfers 300 at the top are mounted on the second limiting surface 235, specifically at either end of the second limiting surface 235 relative to the sliding direction. In this embodiment, the two universal ball transfers 300 at the bottom of the sliding structure 200 are mounted vertically downward, sliding on the plane of the support portion 110 and providing vertical support for the entire sliding structure 200. The other four universal ball transfers 300 are mounted in the opposite direction and can also slide on the plane of the corresponding limiting portion 120, providing horizontal balancing force for the sliding structure 200. The weight of the entire sliding structure 200 can be considered to be standing on the support portion 110.

[0065] It should be noted that in the above embodiment, the support force exerted by the support portion 110 on the sliding structure 200 is F10, the first limiting force exerted by the first limiting portion 121 on the sliding structure 200 is F20, the second limiting force exerted by the second limiting portion 122 on the sliding structure 200 is F21, and the gravity of the sliding structure 200 is g. The above four forces can achieve a state of force balance.

[0066] Reference Figure 10 and Figure 11 In some embodiments of the present application, the second connection portion 230 is slidably connected to the support portion 110 via the universal ball 300. The limiting portion 120 is provided with two, including a first limiting portion 121 and a second limiting portion 122. The first limiting portion 121 is adapted to the first connection portion 220, and the second limiting portion 122 is adapted to the second connection portion 230. The acting forces of the first limiting portion 121 and the second limiting portion 122 are in opposite directions.

[0067] The first connection portion 220 has a vertically arranged first limiting surface 224 on the side facing away from the plate-shaped body 210. The universal ball 300 is arranged on the first limiting surface 224. The first limiting surface 224 abuts against the first limiting portion 121 through the universal ball 300.

[0068] The second connection portion 230 is partially vertically arranged, and the vertical portion has a second limiting surface 235 near the side of the plate-shaped body 210. The universal ball 300 is arranged on the second limiting surface 235, and the second limiting surface 235 abuts against the second limiting portion 122 through the universal ball 300.

[0069] A second support surface 234 is horizontally provided below the vertical portion of the second connecting portion 230 . The universal ball 300 is provided on the second support surface 234 . The second support surface 234 is supported on the support portion 110 through the universal ball 300 .

[0070] Based on the sliding assembly of the embodiment of the present application, the above structure is another embodiment of the sliding structure 200 and the mounting frame 100 in the present application. In this embodiment, a support portion 110 is provided and supported below the second connecting portion 230, and two limiting portions 120 are provided, including a first limiting portion 121 and a second limiting portion 122. The first limiting portion 121 is used to limit the first connecting portion, and the second connecting portion 230 is used to limit the second connecting portion 230. When the directions of the forces acting on the first limiting portion 121 and the second limiting portion 122 are opposite, the first limiting force and the second limiting force can form a limiting torque, which can prevent the sliding structure 200 from being easily separated from the mounting frame 100. The force acting on the first connecting portion 220 by the first limiting portion 121 is the first limiting force, and the force acting on the second connecting portion 230 by the second limiting portion 122 is the second limiting force. The limiting torque is opposite to the deflection torque generated during the deflection of the sliding structure 200 , so as to prevent the sliding structure 200 from being easily deflected and separated from the mounting bracket 100 .

[0071] The first limiting surface 224 arranged vertically can be limited by the first limiting part 121. After the universal ball 300 is provided on the first limiting surface 224, the first limiting surface 224 can be abutted against the first limiting part 121 through the universal ball 300, reducing the relative friction between the first connecting part 220 and the first limiting part 121, so that the sliding structure 200 slides relative to the first limiting part 121 more smoothly; the vertical part of the second connecting part 230 is close to the side of the plate-shaped main body 210 and has a second limiting surface 235. The second limiting surface 235 can be limited by the second limiting part 122. After the universal ball 300 is provided on the second limiting surface 235, the second limiting surface 235 can be abutted against the second limiting part 122 through the universal ball 300, reducing the relative friction between the second connecting part 230 and the second limiting part 122, so that the sliding structure 200 slides relative to the second limiting part 122 more smoothly. The horizontally arranged second support surface 234 can be supported by the support portion 110. After the universal ball transfer 300 is provided on the second support surface 234, the second support surface 234 can be supported on the support portion 110 via the universal ball transfer 300, thereby reducing the relative friction between the second connecting portion 230 and the support portion 110, and making the sliding structure 200 slide more smoothly relative to the support portion 110. The weight of the entire sliding structure 200 can be understood as being suspended from the top.

[0072] It should be noted that the above embodiment can be provided with six universal ball transfers 300, two at the bottom and four at the top. The two universal ball transfers 300 at the bottom are mounted on the first limiting surface 224, specifically at the ends of the first limiting surface 224 relative to the sliding direction; of the four universal ball transfers 300 at the top, two are mounted on the second support surface 234, specifically at the ends of the second support surface 234 relative to the sliding direction, and the other two are mounted on the second limiting surface 235, specifically at the ends of the second limiting surface 235 relative to the sliding direction. In this embodiment, two universal ball transfers 300 are mounted vertically downward at the top of the sliding structure 200, and can slide on the plane of the support portion 110, providing vertical support force for the entire sliding structure 200. The other four universal ball transfers 300 are installed in the opposite direction and can also slide on the plane of the corresponding limiting portion 120, providing horizontal balancing force for the sliding structure 200.

[0073] It should be noted that, in the present application, the first limiting portion 121 is adapted to the first connecting portion 220 and has a first limiting force, and the second limiting portion 122 is adapted to the second connecting portion 230 and has a second limiting force, and the directions of the first limiting force and the second limiting force are opposite.

[0074] It should be noted that in the above embodiment, the support force exerted by the support portion 110 on the sliding structure 200 is F11, the first limiting force exerted by the first limiting portion 121 on the sliding structure 200 is F20, the second limiting force exerted by the second limiting portion 122 on the sliding structure 200 is F21, and the gravity of the sliding structure 200 is g. The above four forces can achieve a state of force balance.

[0075] Reference Figures 8 to 11 In some embodiments of the present application, the first connecting portion 220 includes a first connecting plate 221, the first connecting plate 221 is connected to the plate-shaped body 210, and the first connecting plate 221 extends toward a side away from the plate-shaped body 210;

[0076] The lower surface of the first connecting plate 221 is a first supporting surface 223 , and the side of the first connecting plate 221 facing away from the plate-shaped body 210 is a first limiting surface 224 ;

[0077] The second connecting portion 230 includes a transition plate 231 and a second connecting plate 232. The first side of the transition plate 231 is connected to the plate-shaped body 210. The second connecting plate 232 is connected to the second side of the transition plate 231. The second connecting plate 232 is arranged at an angle to the transition plate 231 and extends in a vertically downward direction.

[0078] The lower surface of the second connecting plate 232 is a second supporting surface 234 , and the side of the second connecting plate 232 close to the plate-shaped body 210 is a second limiting surface 235 ;

[0079] The first support surface 223 or the second support surface 234 is slidably connected to the support portion 110 via the universal ball 300 ; at least one of the first limiting surface 224 and the second limiting surface 235 is slidably connected to the limiting portion 120 via the universal ball 300 .

[0080] Based on the sliding assembly of the embodiment of the present application, the above structure is a further definition of the first connecting portion 220 and the second connecting portion 230. The first connecting portion 220 includes a first connecting plate 221, which is connected to the plate-shaped body 210 and extends toward a side away from the plate-shaped body 210. Specifically, the plane where the first connecting plate 221 is located can be perpendicular to the plate-shaped body 210, or the first connecting plate 221 can be set at an angle to the plate-shaped structure; the lower surface of the first connecting plate 221 is a first supporting surface 223, which is provided when the support portion 110 is aligned with the first connecting portion 220. When combined, a universal ball 300 can be installed on the first support surface 223, and the first connecting plate 221 can be slidably connected to the support part 110 through the universal ball 300. The side of the first connecting plate 221 facing away from the plate-like body 210 is the first limiting surface 224. The first limiting surface 224 can be set in conjunction with the first limiting part 121. The universal ball 300 can be installed on the first limiting surface 224, and the first connecting plate 221 can be slidably connected to the first limiting part 121 through the universal ball 300.

[0081] The second connecting portion 230 includes a transition plate 231 and a second connecting plate 232. The sliding connection portion in the second connecting portion 230 can be only the second connecting plate 232. The transition plate 231 can fix the second connecting plate 232 relative to the plate-like structure; the lower surface of the second connecting plate 232 is a second supporting surface 234. When the support portion 110 is matched with the second connecting portion 230, a universal ball 300 can be installed on the second supporting surface 234, and the second connecting plate 232 is slidably connected to the support portion 110 through the universal ball 300. The side of the second connecting plate 232 close to the plate-like body 210 is a second limiting surface 235. The second limiting surface 235 can be set in conjunction with the second limiting portion 122. The universal ball 300 can be installed on the second limiting surface 235, and the second connecting plate 232 is slidably connected to the second limiting portion 122 through the universal ball 300.

[0082] Reference Figures 12 to 15 In some embodiments of the present application, the plane on which the support portion 110 and the sliding structure 200 slide relative to each other is a curved surface and forms a sliding groove 111, one of the first connecting portion 220 or the second connecting portion 230 is adapted to the sliding groove 111, and the other is adapted to the limiting portion 120.

[0083] Based on the sliding assembly of the embodiment of the present application, the slide groove 111 can apply an oblique supporting force to the sliding structure 200, and the supporting force can have two supporting components in the horizontal direction and the vertical direction, wherein the supporting component in the horizontal direction is balanced with the limiting force of the limiting part 120, and the supporting component in the vertical direction is balanced with the gravity of the sliding structure 200.

[0084] It should be noted that the shape of the chute 111 can be set as needed and is not limited to the chute 111 formed by the curved surface mentioned above. The chute 111 can also be formed by splicing multiple planes.

[0085] The above embodiment of the present application can utilize a supporting plane / curved surface instead of a one-dimensional linear convex guide rail, allowing the universal ball 300 to roll freely on the plane or curved surface to avoid lateral pressure.

[0086] Reference Figure 12 and Figure 13 In some embodiments of the present application, the first connecting portion 220 is adapted to the slide groove 111. The first connecting portion 220 includes a first extending portion 222 extending obliquely downward in a direction away from the plate-shaped body 210. The end of the first extending portion 222 is adapted to the slide groove 111. At least two universal ball bearings 300 are provided on the end of the first extending portion 222.

[0087] The second connecting portion 230 includes a transition plate 231 and a second connecting plate 232, the first side of the transition plate 231 is connected to the plate-shaped body 210; the second connecting plate 232 is connected to the second side of the transition plate 231, the second connecting plate 232 is set at an angle to the transition plate 231 and extends in a vertical downward direction, and the side of the second connecting plate 232 close to the plate-shaped body 210 is a second limiting surface 235, and the second limiting surface 235 is adapted to the limiting portion 120.

[0088] Based on the sliding assembly of the embodiment of the present application, the above structure is a third embodiment of the sliding structure 200 and the mounting bracket 100 in this application. In this embodiment, the first connecting portion 220 is adapted to the slide groove 111. The gravity of the sliding structure 200 acts on the slide groove 111 through the first extension portion 222. The slide groove 111 generates a support force opposite to the extension direction. This support force can have two support components: horizontal and vertical. The horizontal support component is balanced by the first limiting force of the first limiting portion 121, and the vertical support component is balanced by the gravity of the sliding structure 200. At least two universal ball transfers 300 can be disposed at the end of the first extension portion 222.

[0089] The second connecting portion 230 includes a transition plate 231 and a second connecting plate 232. The sliding connection portion of the second connecting portion 230 may be solely the second connecting plate 232. The transition plate 231 secures the second connecting plate 232 relative to the plate-like structure. The side of the second connecting plate 232 proximal to the plate-like body 210 is a second limiting surface 235. This second limiting surface 235 is configured to mate with the second limiting portion 122. A universal ball transfer 300 may be mounted on the second limiting surface 235, allowing the second connecting plate 232 to be slidably connected to the second limiting portion 122 via the universal ball transfer 300.

[0090] The above embodiment can only be provided with four universal ball transfers 300. Compared with the first embodiment, the support portion 110 and the first limiting portion 121 are combined and simplified into the above-mentioned support portion 110 with the slide groove 111. When the structural design and processing conditions permit, the universal ball transfer 300 at the bottom can slide in conjunction with the slide groove 111 formed by the curved surface, which can better exert the flexibility of the universal ball transfer 300.

[0091] It should be noted that in the above embodiment, the oblique supporting force of the support portion 110 supporting the sliding structure 200 is F13, the second limiting force of the second limiting portion 122 on the sliding structure 200 is F21, and the gravity of the sliding structure 200 is g. The above three forces can achieve a force balance state.

[0092] Reference Figure 14 and Figure 15 In some embodiments of the present application, the first connecting portion 220 includes a first connecting plate 221, the first connecting plate 221 is connected to the plate-shaped body 210, and the first connecting plate 221 extends toward a side away from the plate-shaped body 210. The side of the first connecting plate 221 away from the plate-shaped body 210 is a first limiting surface 224, and the first limiting surface 224 is adapted to the limiting portion 120;

[0093] The second connecting portion 230 is adapted to the slide groove 111, and the second connecting portion 230 includes a second extension portion 233 extending obliquely downward in a direction close to the plate-like body 210. The end of the second extension portion 233 is adapted to the slide groove 111, and at least two universal ball transfers 300 are provided on the end of the second extension portion 233.

[0094] Based on the sliding assembly of the embodiment of the present application, the above structure is the fourth embodiment of the sliding structure 200 and the mounting bracket 100 in the present application. In this embodiment, the first connecting plate 221 is connected to the plate-like body 210, and the first connecting plate 221 extends toward the side away from the plate-like body 210. Specifically, the plane on which the first connecting plate 221 is located can be perpendicular to the plate-like body 210, or the first connecting plate 221 can be arranged at an angle to the plate-like structure. The side of the first connecting plate 221 facing away from the plate-like body 210 is a first limiting surface 224, which is adapted to the limiting portion 120. A universal ball 300 can be installed on the first limiting surface 224, and the first connecting plate 221 can be slidably connected to the first limiting portion 121 through the universal ball 300.

[0095] The second connecting portion 230 is adapted to the slide groove 111. The gravity of the sliding structure 200 acts on the slide groove 111 through the second extending portion 233. The slide groove 111 generates a supporting force opposite to the extension direction. This supporting force can have two supporting components: horizontal and vertical. The horizontal supporting component is balanced by the second limiting force of the second limiting portion 122, while the vertical supporting component is balanced by the gravity of the sliding structure 200. At least two universal ball bearings 300 can be provided at the end of the second extending portion 233.

[0096] It should be noted that the above four embodiments of the present application are merely exemplary embodiments and do not represent all embodiments of the present application. The number of universal ball transfers 300 in the present application is not limited to four or six, and other numbers of universal ball transfers 300 may be provided as needed. Each plane on which the universal ball transfers 300 are provided may further include more universal ball transfers 300 as needed.

[0097] The above embodiment can only be provided with four universal ball transfers 300. Compared with the second embodiment, the support portion 110 and the second limiting portion 122 are combined and simplified into the above-mentioned support portion 110 with the slide groove 111. When the structural design and processing conditions permit, the universal ball transfer 300 at the bottom can slide in conjunction with the slide groove 111 formed by the curved surface, which can better exert the flexibility of the universal ball transfer 300.

[0098] It should be noted that the curved surfaces used in the third and fourth embodiments of the present application can better adapt to the directional changes of the universal ball 300. This is because the slight deformation caused by factors such as overall structural deformation and sliding can be ignored.

[0099] It should be noted that in the above embodiment, the oblique supporting force of the support portion 110 supporting the sliding structure 200 is F14, the first limiting force of the first limiting portion 121 on the sliding structure 200 is F20, and the gravity of the sliding structure 200 is g. The above three forces can achieve a force balance state.

[0100] In some embodiments of the present application, along the sliding direction of the sliding structure 200, a universal ball 300 is respectively provided on the opposite sides of each surface on which the universal ball 300 is installed, or at least two universal balls 300 are arranged on each surface on which the universal ball 300 is installed.

[0101] In the sliding assembly of the embodiments of the present application, the number of universal ball transfers 300 is set according to actual needs. The four embodiments described above describe arrangements of four or six universal ball transfers 300. Taking six universal ball transfers 300 as an example, the six universal ball transfers 300 are divided into three groups, with two universal ball transfers in each group positioned at corresponding ends. A certain number of universal ball transfers 300 can be added between the two universal ball transfers 300 in each group as needed.

[0102] It should be noted that the universal ball transfer 300 of the present application can also be used in transmission systems, feeding systems, processing systems, processing machinery, and packaging machinery auxiliary equipment. Specifically, it can be installed in the sliding components of such systems or equipment to facilitate steering, rotation, and translational motion. The material of the universal ball transfer 300 can be selected and matched according to different usage environments, occasions, and applications. If necessary, an appropriate amount of lubricant can be added to reduce rolling resistance and extend service life.

[0103] It should be noted that the present application can avoid the generation of lateral forces, and the sliding structure 200, such as a blackboard, can slide smoothly without jamming or blocking. Both the bottom support structure and the top suspension structure can minimize the bending deformation of the structural parts. This reduces the gaps between parts and reduces the processing requirements for the tolerance dimensions of the parts. In addition, the sliding assembly of the present application only needs to use fewer universal ball transfers 300 to achieve the corresponding sliding effect, and has the beneficial effects of light weight, low cost, simple design and processing, and flexible and convenient installation and maintenance. During long-term normal use, no subsequent maintenance is required.

[0104] Reference Figure 16 and Figure 17 , respectively showing the fifth and sixth embodiments of the sliding assembly of the present application, wherein, Figure 16 The second connection portion 230 is connected to two limiting portions 120 at the same time, and the two limiting portions 120 are located on opposite sides of the second connection portion 230. Figure 17The second connection portion 230 is connected to the two limiting portions 120 and the support portion 110 at the same time, wherein the two limiting portions 120 are respectively located on opposite sides of the second connection portion 230, and the two limiting portions 120 and the support portion 110 cooperate to form a sliding groove with the opening facing the left.

[0105] In a second aspect, an embodiment of the present application provides a multimedia device, comprising the sliding assembly as described above.

[0106] The sliding assembly of the embodiment of the present application and multimedia devices equipped with the sliding assembly can achieve smoother sliding between the sliding structure 200 and the mounting frame 100, reducing the likelihood of jamming or rail gnawing due to torque. The mounting frame 100 is used to support the sliding structure 200, which is movable relative to the mounting frame 100. The universal ball transfer 300 can reduce friction between the sliding structure 200 and the mounting frame 100, thereby achieving smoother relative sliding between the sliding structure 200 and the mounting frame 100. The sliding structure 200 can slide laterally relative to the mounting frame 100. The mounting frame 100 has one or more supporting parts 110 that can support the sliding structure 200, specifically supporting the sliding structure 200 in a vertical plane, that is, the supporting part 110 can directly or indirectly overcome the weight of the sliding structure 200. The supporting part 110 can specifically be an oblique support or a vertical upward support; the mounting frame 100 also has one or more limiting parts 120 that can limit the sliding structure 200 in a horizontal plane. The limiting part 120 can limit part of the structure of the sliding structure 200 to a certain vertical plane, thereby reducing the possibility of the sliding structure 200 flipping or tipping over. The support portion 110 and the limiting portion 120 are both slidably connected to the sliding structure 200 via the corresponding universal ball 300. This reduces friction between the sliding structure 200 and the mounting frame 100, making relative sliding smoother. Compared to the pulley structure connection method in the prior art, no eccentric torque is generated due to gravity or deflection. The universal ball 300 reduces or eliminates eccentric torque by sliding in the corresponding direction. After eccentric sliding, the universal ball 300 can still ensure lateral sliding between the sliding structure 200 and the mounting frame 100, making relative sliding smoother and less prone to jamming or gnawing. The support portion 110 can provide support for the sliding structure 200, and the limiting portion 120 can provide limiting force for the sliding structure 200. When the sliding structure 200 is relatively stationary relative to the mounting frame 100, the support force, the limiting force, and the gravity of the sliding structure 200 are relatively balanced. The embodiment of the present application has the beneficial effect that the sliding between the sliding structure 200 and the mounting frame 100 is smoother and is less likely to cause jamming or gnawing of the rail due to torque.

[0107] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0108] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A sliding assembly, characterized in that: include: A mounting frame, wherein the mounting frame is fixedly arranged; a sliding structure, slidably connected to the mounting frame, the sliding structure being capable of sliding laterally relative to the mounting frame; a plurality of universal ball bearings, mounted at sliding connection positions of the sliding structure and / or the mounting frame; The mounting frame includes one or more supporting parts capable of supporting the sliding structure in a vertical plane and one or more limiting parts capable of limiting the sliding structure in a horizontal plane. The supporting parts and the limiting parts are both slidably connected to the sliding structure via the corresponding universal ball bearings. The supporting parts provide a supporting force for the sliding structure, and the limiting parts provide a limiting force for the sliding structure. When the sliding structure is relatively stationary with respect to the mounting frame, the supporting force, the limiting force, and the gravity of the sliding structure are balanced. The universal ball is mounted on the sliding structure, and the sliding structure includes: plate-like body; A first connecting portion is provided at the bottom of the plate-shaped body; a second connecting portion, disposed on the top of the plate-shaped body; The first connecting portion or the second connecting portion is slidably connected to the supporting portion via the universal ball; at least one of the first connecting portion and the second connecting portion is slidably connected to the limiting portion via the universal ball; There are two limiting parts, including a first limiting part and a second limiting part. The first limiting part is adapted to the first connecting part, and the second limiting part is adapted to the second connecting part. The directions of the forces acting on the first limiting part and the second limiting part are opposite.

2. The sliding assembly according to claim 1, wherein: The first connecting portion is slidably connected to the supporting portion via the universal ball; The first connecting portion has a first supporting surface arranged horizontally, the universal ball is arranged on the first supporting surface, and the first supporting surface is supported on the supporting portion through the universal ball; The side of the first connecting portion facing away from the plate-shaped body has a vertically arranged first limiting surface, the first limiting surface is provided with the universal ball, and the first limiting surface abuts against the first limiting portion through the universal ball; The second connecting portion has a vertical portion, and the vertical portion has a second limiting surface on a side surface close to the plate-shaped body. The universal ball is provided on the second limiting surface, and the second limiting surface abuts against the second limiting portion through the universal ball.

3. The sliding assembly according to claim 1, wherein: The second connecting portion is slidably connected to the supporting portion via the universal ball; The side of the first connecting portion facing away from the plate-shaped body has a vertically arranged first limiting surface, the first limiting surface is provided with the universal ball, and the first limiting surface abuts against the first limiting portion through the universal ball; The second connecting portion is partially vertically arranged, and the vertical portion has a second limiting surface close to the side surface of the plate-shaped body, the second limiting surface is provided with the universal ball, and the second limiting surface abuts against the second limiting portion through the universal ball; A horizontally arranged second supporting surface is provided below the vertical portion of the second connecting portion, the universal ball is provided on the second supporting surface, and the second supporting surface is supported on the supporting portion through the universal ball.

4. The sliding assembly according to claim 1, wherein: The first connecting portion includes a first connecting plate, the first connecting plate is connected to the plate-shaped body, and the first connecting plate extends toward a side away from the plate-shaped body; The lower surface of the first connecting plate is a first supporting surface, and the side of the first connecting plate facing away from the plate-shaped body is a first limiting surface; The second connecting portion includes: a transition plate, a first side of the transition plate being connected to the plate-shaped body; a second connecting plate connected to a second side of the transition plate, the second connecting plate being arranged at an angle to the transition plate and extending in a vertically downward direction; The lower surface of the second connecting plate is a second supporting surface, and the side of the second connecting plate close to the plate-shaped body is a second limiting surface; Wherein, the first supporting surface or the second supporting surface is slidably connected to the supporting portion via the universal ball; and at least one of the first limiting surface and the second limiting surface is slidably connected to the limiting portion via the universal ball.

5. The sliding assembly according to claim 1, wherein: The plane on which the support portion and the sliding structure slide relative to each other is a curved surface and forms a sliding groove. One of the first connecting portion or the second connecting portion is adapted to the sliding groove, and the other is adapted to the limiting portion.

6. The sliding assembly according to claim 5, wherein: The first connecting portion is adapted to the slide groove, and the first connecting portion includes a first extending portion extending obliquely downward in a direction away from the plate-shaped body, an end portion of the first extending portion is adapted to the slide groove, and at least two universal ball bearings are provided on the end portion of the first extending portion; The second connecting portion includes: a transition plate, a first side of the transition plate being connected to the plate-shaped body; A second connecting plate is connected to the second side of the transition plate. The second connecting plate is set at an angle to the transition plate and extends in a vertical downward direction. The side of the second connecting plate close to the plate-like body is a second limiting surface, and the second limiting surface is adapted to the limiting portion.

7. The sliding assembly according to claim 5, wherein: The first connecting portion includes a first connecting plate, the first connecting plate is connected to the plate-shaped body, the first connecting plate extends toward a side away from the plate-shaped body, the side of the first connecting plate away from the plate-shaped body is a first limiting surface, and the first limiting surface is adapted to the limiting portion; The second connecting portion is adapted to the slide groove, and the second connecting portion includes a second extension portion extending obliquely downward in a direction close to the plate-like body, the end portion of the second extension portion is adapted to the slide groove, and at least two universal ball bearings are provided on the end portion of the second extension portion.

8. The sliding assembly according to any one of claims 1 to 7, wherein: Along the sliding direction of the sliding structure, one universal ball is respectively provided on two opposite sides of each surface on which the universal ball is mounted, or at least two universal balls are arranged on each surface on which the universal ball is mounted.

9. A multimedia device, characterized in that: Comprising the sliding assembly according to any one of claims 1 to 8.

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