Extension device and table using the same

Abstract

An expansion device includes a shielding member, a rotating mechanism, and a lifting mechanism. The rotating mechanism includes a rotating shaft, a fixed frame, and a locking assembly. The shielding member is slidably connected to the outer periphery of the fixed frame. The inner periphery of the fixed frame and the locking assembly are sleeved outside the rotating shaft. By rotating the shielding member, the shielding member is controlled to rise or fall relative to the fixed frame. The locking assembly is used to lock or release the rotating shaft. The lifting mechanism includes a connecting frame, multiple lifting assemblies, and a pressure plate. Each lifting assembly is slidably connected to the connecting frame. The pressure plate is connected to the fixed frame. The connecting frame is rotatably connected to the rotating shaft. By rotating the connecting frame, the lifting assembly is controlled to extend and extend. The above-mentioned expansion device can be used on a table to control the extension and contraction of the table top, thereby achieving control of the desktop area.

Description

Technical Field

[0001] The present application relates to the field of structural design, and in particular to an expansion device and a table using the expansion device. Background Art

[0002] Tables are widely used in daily homes and offices. The traditional table structure consists of supporting legs and a table top, which has a relatively simple structure. When there are many people, the size of the table top cannot be changed according to the number of people. When there are few people, a table with a larger table top takes up more space. Summary of the Invention

[0003] In view of this, it is necessary to provide an extension device and a table using the extension device.

[0004] An embodiment of the present application provides an expansion device, which includes a shielding member, a rotating mechanism and a lifting mechanism. The rotating mechanism includes a rotating shaft, a fixed frame and a locking assembly. The shielding member is slidably connected to the outer periphery of the fixed frame, and the inner periphery of the fixed frame and the locking assembly are sleeved outside the rotating shaft. By rotating the shielding member, the shielding member is controlled to rise or fall relative to the fixed frame. The locking assembly is used to lock or release the rotating shaft. The lifting mechanism includes a connecting frame, multiple lifting assemblies and a pressure plate. Each lifting assembly is slidably connected to the connecting frame, the pressure plate is connected to the fixed frame, and the connecting frame is rotatably connected to the rotating shaft. By rotating the connecting frame, the lifting assembly is controlled to extend and lower.

[0005] Furthermore, in some embodiments of the present application, the shielding member includes a plurality of connecting plates connected end to end, the inner wall of each connecting plate is provided with a sliding groove, and each of the sliding grooves is inclined and has the same inclination direction.

[0006] Furthermore, in some embodiments of the present application, the fixed frame includes a first locking position and a second locking position, and the first locking position and the second locking position are arranged on the periphery of the fixed frame. The shielding member is also provided with a handle, and the handle is used to clamp in the first locking position or the second locking position to limit the rotation position of the shielding member.

[0007] Furthermore, in some embodiments of the present application, the locking assembly includes a snap ring, a rotating rod, a gripper, a push rod and an elastic member. The snap ring is sleeved on the outside of the rotating shaft. One end of the rotating rod is connected to the snap ring, and the other end is connected to the gripper. The elastic member is connected to the rotating rod and the gripper. The push rod is fixed on the connecting plate. By pushing the gripper, the snap ring is controlled to lock or release the rotating shaft.

[0008] Furthermore, in some embodiments of the present application, each of the lifting components includes a support frame, a plurality of lifting frames and a connecting frame, the support frame is slidably connected to the fixed frame and the connecting frame, and one end of each lifting frame is connected to the support frame and the other end is connected to the connecting frame.

[0009] Furthermore, in some embodiments of the present application, the lifting assembly also includes a lifting bearing and a limit bearing, the lifting bearing is installed on the connecting bracket, the limit bearing is installed on the support frame, the lifting bearing and the limit bearing are arranged tangent to each other, and the pressure plate points to the tangent point of the lifting bearing and the limit bearing. By controlling the position of the pressure plate, the spacing between the lifting bearing and the limit bearing is adjusted.

[0010] Furthermore, in some embodiments of the present application, the lifting frame includes a hinged first bracket, two second brackets and a third bracket, the two sides of one end of the two second brackets are respectively connected to the first bracket and the support frame, one side of the third bracket is connected to the connecting bracket, and the other side is respectively connected to the two second brackets, and the first bracket and the third bracket are located on opposite sides of the two second brackets.

[0011] Furthermore, in some embodiments of the present application, one end of the pressure plate is angular, and the pressure plate is used to support the lifting bearing and the limit bearing, and the other end is an arc-shaped structure, and the arc-shaped structure is concentrically arranged with the rotating shaft.

[0012] Furthermore, in some embodiments of the present application, the fixed frame also includes a plurality of first slide rails, which are arranged to radiate outward from the center of the fixed frame, the connecting frame includes a frame body and a plurality of extension arms connected to the frame body, the frame body is connected to the rotating shaft, each of the extension arms is provided with a second slide rail, and the support frame is slidably arranged on the first slide rail and the second slide rail respectively.

[0013] An embodiment of the present application also provides a table using the above-mentioned expansion device, including a bracket and a table board assembly, which are respectively connected to the expansion device, and the table board assembly includes a first table board, a second table board and a third table board, the first table board and the second table board are arranged on the connecting frame of the lifting mechanism, and the third table board is accommodated in the covering member and fixedly arranged on the lifting assembly, and the third table board is exposed from the covering member by rotating the covering member, and the second table board is driven to rotate the connecting frame, and the connecting frame drives the lifting assembly to extend and rise, so that the lifting assembly drives the third table board to extend from the covering member and makes the third table board rise to be flush with the second table board.

[0014] The above-mentioned expansion device can be used on the table. Through the cooperation between the shielding part, the rotating mechanism and the lifting mechanism, the extension and retraction of the table top can be controlled, thereby realizing the control of the desktop area. The size of the desktop can be controlled according to needs, and it is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the exploded structure of a table in one embodiment of the present application.

[0016] Figure 2 This is a partially enlarged schematic diagram of a handle in one embodiment of the present application.

[0017] Figure 3 Schematic diagram of the structure of the rotating mechanism in one embodiment of the present application.

[0018] Figure 4 This is a structural schematic diagram of the rotation mechanism from another perspective in one embodiment of the present application.

[0019] Figure 5 This is a schematic structural diagram of a handle from another perspective in one embodiment of the present application.

[0020] Figure 6 Schematic diagram of the structure of the locking assembly in one embodiment of the present application.

[0021] Figure 7 Schematic diagram of the structure of the lifting mechanism in one embodiment of the present application.

[0022] Figure 8 Schematic diagram of the structure of the lifting assembly in one embodiment of the present application.

[0023] Figure 9 This is a structural schematic diagram of the lifting assembly from another perspective in one embodiment of the present application.

[0024] Figure 10 This is a schematic diagram of the exploded structure of the lifting assembly in one embodiment of the present application.

[0025] Figure 11 This is a schematic structural diagram of a table in one embodiment of the present application.

[0026] Figure 12 This is a schematic diagram of the state changes of a table in one embodiment of the present application.

[0027] Figure 13 This is a schematic diagram of the state changes of a table in one embodiment of the present application.

[0028] Figure 14 This is a schematic diagram of the state changes of a table in one embodiment of the present application.

[0029] Description of main component symbols

[0030]

[0031]

[0032] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0034] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] An embodiment of the present application provides an expansion device, which includes a covering member, a rotating mechanism and a lifting mechanism. The rotating mechanism includes a rotating shaft, a fixed frame and a locking assembly. The covering member is slidably connected to the outer periphery of the fixed frame, and the inner periphery of the fixed frame and the locking assembly are sleeved outside the rotating shaft. By rotating the covering member, the covering member is controlled to rise or fall relative to the fixed frame. The locking assembly is used to lock or release the rotating shaft. The lifting mechanism includes a connecting frame, multiple lifting assemblies and a pressure plate. Each lifting assembly is slidably connected to the connecting frame, the pressure plate is connected to the fixed frame, and the connecting frame is rotatably connected to the rotating shaft. By rotating the connecting frame, the lifting assembly is controlled to extend and lower.

[0037] An embodiment of the present application also provides a table using the above-mentioned expansion device, including a bracket and a table board assembly, which are respectively connected to the expansion device, and the table board assembly includes a first table board, a second table board and a third table board, the first table board and the second table board are arranged on the connecting frame of the lifting mechanism, and the third table board is accommodated in the covering member and fixedly arranged on the lifting assembly, and the third table board is exposed from the covering member by rotating the covering member, and the second table board is driven to rotate the connecting frame, and the connecting frame drives the lifting assembly to extend and rise, so that the lifting assembly drives the third table board to extend from the covering member and makes the third table board rise to be flush with the second table board.

[0038] The above-mentioned expansion device can be used on the table. Through the cooperation between the shielding part, the rotating mechanism and the lifting mechanism, the extension and retraction of the table top can be controlled, thereby realizing the control of the desktop area. The size of the desktop can be controlled according to needs, and it is highly practical.

[0039] Some implementation methods of the present application are described in detail below with reference to the accompanying drawings.

[0040] See also Figure 1 , Figure 1 The table 200 shown includes a bracket 201, a table top assembly 202 and an expansion device 100. The bracket 201 and the table top assembly 202 are respectively connected to the expansion device 100. In one embodiment, the table top assembly 202 includes a first table top 2021, a second table top 2022 and a third table top 2023, and the first table top 2021, the second table top 2022 and the third table top 2023 are all connected to the expansion device 100, wherein the second table top 2022 is rotatably arranged around the outer periphery of the first table top 2021, and the first table top 2021 and the second table top 2022 are concentrically arranged. The third table top 2023 can be selectively hidden or revealed around the second table top 2022. Specifically, when the table 200 is retracted, the third table top 2023 is located in the accommodating space of the expansion device 100, and when the table 200 is unfolded, the third table top 2023 surrounds the outer periphery of the second table top 2022. In one embodiment, the first table top 2021 is a circular structure, the second table top 2022 is a ring structure with an inner diameter substantially the same as the outer diameter of the first table top 2021, and the third table top 2023 is composed of a plurality of sector-shaped panels. In one embodiment, the third table top 2023 is composed of six sector-shaped panels, each of which is provided with a connector for connecting the third table top 2023 to the expansion device 100. It is understood that the number of third table tops 2023 is not limited to the above and can be adjusted according to actual needs.

[0041] The expansion device 100 includes a shielding member 10, a rotating mechanism 20 and a lifting mechanism 30. The rotating mechanism 20 is connected to the bracket 201 and is disposed in the shielding member 10. One end of the lifting mechanism 30 is connected to the rotating mechanism 20 and the other end is connected to the third table top 2023.

[0042] Please also refer to Figure 2 , the shielding member 10 includes a plurality of connecting plates 11, and the plurality of connecting plates 11 are connected end to end to form a hollow ring structure, and the third table top 2023, the rotating mechanism 20 and the lifting mechanism 30 are all accommodated in the ring structure. A slide groove 111 is provided on the inner wall of each of the connecting plates 11, and each of the slide grooves 111 is inclined and has the same inclination direction. In one embodiment, the two ends of the slide groove 111 extend to the diagonal positions of the connecting plate 11 respectively. In another embodiment, the two ends of the slide groove 111 extend to the opposite side edges of the connecting plate respectively. In one embodiment, the connecting plate 11 is an arc-shaped plate, and the outer diameter of the circular ring formed by splicing a plurality of the connecting plates 11 is roughly the same as the inner diameter of the circular ring formed by splicing the third table top 2023.

[0043] The shielding member 10 further includes a handle 12. The handle 12 is disposed on the inner side of the connecting plate 11 via a fixing member. By rotating the position of the handle 12, it is used to cooperate with the rotating mechanism 20 to unlock or clamp the shielding member 10, thereby maintaining the expanded or retracted state of the table 200.

[0044] Please also refer to Figure 3 and Figure 4The rotating mechanism 20 includes a rotating shaft 21, a fixed frame 22 sleeved around the rotating shaft, and a locking assembly 23. The fixed frame 22 is provided with a plurality of rollers 221 slidably disposed within the chute 111. By rotating the shielding member 10, the rollers 221 slide within the chute 111, thereby causing the shielding member 10 to be raised or lowered by rotation. In one embodiment, the shielding member 10 can be raised by rotating clockwise or lowered counterclockwise, or lowered by rotating clockwise or raised counterclockwise, by adjusting the inclination direction of the chute 111. In one embodiment, the shielding member 10 is lowered by rotating the shielding member 10 clockwise or counterclockwise, the third table board 2023 is extended from the shielding member 10 and raised by rotating the second table board 2022, the third table board 2023 is retracted into the shielding member 10 by rotating the second table board 2022 in the opposite direction, and the shielding member 10 is raised and tightly connected to the second table board 2022 by rotating the shielding member 10 in the opposite direction. The fixed frame 22 further includes a plurality of first slide rails 222, which are arranged to diverge outward from the center of the fixed frame 22 and are connected to the lifting mechanism 30. In one embodiment, the first slide rails 222 are curved slide rails, and the number of the first slide rails 222 is the same as the number of the third table boards 2023.

[0045] Please also refer to Figure 2 and Figure 5 The fixed frame 22 is provided with a first locking position 224 and a second locking position 225. The first locking position 224 and the second locking position 225 are located on the outer periphery of the fixed frame 22 and are used to clamp the handle 12, thereby maintaining the table 200 in an expanded or retracted state. Specifically, by rotating the handle 12, it is clamped in the first locking position 224 to maintain the table 200 in a retracted state, and by rotating the handle 12, it is clamped in the second locking position 225 to maintain the table 200 in an expanded state.

[0046] See also Figure 6The locking assembly 23 includes a snap ring 231, a rotating rod 232, a grip 233, a push rod 234 and an elastic member 235. The snap ring 231 is sleeved on the outer circumference of the rotating shaft 21. One end of the rotating rod 232 is connected to the snap ring 231, and the other end is connected to the grip 233. The push rod 234 is arranged on the inner side of the connecting plate 11 through a fixing member, and is used to cooperate with the grip 233 to push the grip 233 to rotate clockwise or counterclockwise. The elastic member 235 connects the rotating rod 232 and the grip 233, and is used to limit the grip 233 and provide partial elastic force when the snap ring 231 locks or releases the position of the rotating shaft 21, so as to facilitate the rotation of the grip 233. During use, by rotating the shielding member 10, the push rod 234 pushes the gripping handle 233 to rotate, thereby driving the rotating rod 232 to rotate. Through the principle of leverage, the snap ring 231 is controlled to lock or release the rotating shaft 21. In one embodiment, rotating the shielding member 10 counterclockwise causes the snap ring 231 to release the rotating shaft 21, while rotating the shielding member 10 clockwise causes the snap ring 231 to lock the rotating shaft 21.

[0047] See also Figure 7 The lifting mechanism 30 includes a connecting frame 31, a plurality of lifting components 32, and a plurality of pressure plates 33. The connecting frame 31 is connected to the rotating shaft 21, the lifting components 32 are slidably connected to the connecting frame 31 and fixedly connected to the third table top 2023, and the plurality of pressure plates 33 are fixed to the outer periphery of the fixed frame 22.

[0048] The connecting frame 31 includes a frame body 311 and a plurality of extension arms 312 connected to the frame body 311. The frame body 311 is connected to the inner periphery of the rotating shaft 21 and is used to drive the connecting frame 31 to rotate. The plurality of extension arms 312 are arranged to diverge outward from the outer periphery of the frame body 311. The first table top 2021 and the second table top 2022 are mounted on the frame body 311 and the extension arms 312. Each of the extension arms 312 is provided with a second slide rail 3121, and each of the second slide rails 3121 is slidably connected to the corresponding lifting assembly 32. In one embodiment, the frame body 311 is further provided with a guide portion 313, which is used to facilitate the rotation of the first table top 2021 and / or the second table top 2022. In one embodiment, the plurality of extension arms 312 are evenly arranged on the outer periphery of the frame body 311, and the number of the extension arms 312 is the same as the number of the third table top 2023.

[0049] See also Figure 8 、 Figure 9 and Figure 10Each lifting assembly 32 includes a support frame 321, a plurality of lifting frames 322, a connecting bracket 323, a lifting bearing 324, a limit bearing 325, and a fixing plate 326. The limit bearing 325 and a pulley 3211 are provided at one end of the support frame 321, and a plurality of sliders 3212 are provided at the other end. The pulley 3211 is slidably mounted on the first slide rail 222, and the sliders 3212 are slidably connected to the second slide rail 3121 of the extension arm 312. The fixing plate 326 is fixed to the support frame 321 and is used to mount the third table top 2023. The lifting frames 322 are mounted on both sides of the support frame 321. The connecting bracket 323 is connected to the lifting frames 322 at both ends. The lifting bearing 324 is mounted on the connecting bracket 323 and is substantially perpendicular to the connecting bracket 323. The lifting bearing 324 and the limit bearing 325 are arranged opposite each other. In one embodiment, the lifting frame 322 includes a first bracket 3221, two second brackets 3222, and a third bracket 3223. The ends of the first bracket 3221 are movably connected to the two second brackets 3222 and are located on the same side of the second brackets 3222. The other sides of the two second brackets 3222 are connected to the support frame 321. One side of the third bracket 3223 is connected to the connecting bracket 323, and the two ends of the other side are connected to the two second brackets 3222. The first bracket 3221 and the third bracket 3223 are located on opposite sides of the second bracket 3222. In one embodiment, the first bracket 3221, the two second brackets 3222, and the third bracket 3223 are hinged.

[0050] See also Figure 4The pressure plate 33 is disposed on the outer periphery of the fixed frame 22 and is used to cooperate with the lifting assembly 32 to adjust the rise or fall of the support frame 321. The pressure plate 33 is generally arc-shaped. One end of the pressure plate 33 is angular to facilitate the expansion of the lifting bearing 324 and the limit bearing 325. The arc of the other end is concentric with the rotating shaft 21, which is used to guide the pressure plate 33 to the center of the rotating shaft 21, so that the inner circumference of the third table top 2023 is closely attached to the outer circumference of the second table top 2022. Specifically, when the table 200 is in the retracted state, the lifting bearing 324 and the limit bearing 325 are set tangently. When the connecting frame 31 rotates, one end of the pressure plate 33 presses against the tangent point of the lifting bearing 324 and the limit bearing 325 and continues to rotate. The distance between the lifting bearing 324 and the limit bearing 325 is stretched by the pressure plate 33, so that the connecting bracket 323 is forced to move outward, thereby driving the lifting frame 322 to rise. When the distance between the lifting bearing 324 and the limit bearing 325 is stretched to the maximum, the height of the third table board 2023 is roughly in the same plane as the positions of the first table board 2021 and the second table board 2022. It continues to rotate so that the lifting bearing 324 and the limit bearing 325 are at the end of the pressure plate 33. Since the arc of the end of the pressure plate 33 points to the center of the circle, the inner circumference of the third table board 2023 is close to the outer circumference of the second table board 2022. In one embodiment, when the distance between the lifting bearing 324 and the limiting bearing 325 is maximized, the lifting bearing 324 is located in the middle of the pressure plate 33. In one embodiment, the fixed frame 22 is provided with a guide member for guiding the pressure plate 33 between the lifting bearing 324 and the limiting bearing 325. In one embodiment, the pressure plate 33 is crescent-shaped.

[0051] See also Figure 11 、 Figure 12 、 Figure 13 and Figure 14In one embodiment, when in use, the table is unfolded as follows: the table 200 is initially in a retracted state, the snap ring 231 locks the shaft 21, first adjust the position of the handle 12, rotate the shielding member 10, so that the push rod 234 drives the gripper 233 to rotate, so that the snap ring 231 loosens the shaft 21, and the position of the shielding member 10 is lowered through the first slide rail 222, and the second table top 2022 is rotated, and the lifting assembly 32 slides out through the first slide rail 222 and the second slide rail 3121, so that the lifting assembly 32 is located at the lifting position. The third table top 2023 on the assembly 32 is unfolded from the accommodating space between the shielding member 10 and the table top assembly 202, and the second table top 2022 is continued to be rotated. The inner peripheral side of the third table top 2023 is pressed against the outer periphery of the second table top 2022 by the pressure plate 33, and the handle 12 is adjusted to the second locking position 225. The third table top 2023 is extended from the shielding member 10 and the third table top 2023 is raised to be flush with the second table top 2022, so that the table 200 remains in the unfolded state.

[0052] In one embodiment, when in use, the table is retracted in the following manner: first, the position of the handle 12 is adjusted, the shielding member 10 is rotated to lower the position of the shielding member 10, the second table top 2022 is rotated, the lifting assembly 32 is retracted into the accommodating space between the shielding member 10 and the table top assembly 202, the shielding member 10 is rotated in the opposite direction to make the shielding member 10 rise and abut against the second table top 2022, and the handle 12 is adjusted to the first locking position 224 to keep the table 200 in a retracted state.

[0053] It is understood that in order to control the shielding member 10 to rise or fall relative to the fixed frame 22, the slide groove 111 on the connecting plate 11 can be vertically arranged, and the shielding member 10 can rise or fall vertically along the slide groove 111. In another embodiment, the shielding member 10 and the fixed frame 22 can also be connected by a gear rack connection.

[0054] It is understandable that there can be two lifting frames 322 on the lifting assembly 32, and the connecting bracket 323 on the lifting assembly 32 can be omitted, that is, one end of the lifting frame 322 is directly connected to the third table board 2023, and the other end is connected to the support frame 321.

[0055] It is understandable that the third table top 2023 can be controlled to extend or retract by rotating the first table top 2021 .

[0056] The above-mentioned table rotates the covering part to expose the third table top from the covering part, and rotates the second table top to drive the connecting frame to rotate, so that the lifting assembly drives the third table top to extend or retract from the covering part, thereby achieving control of the table top area. The size of the table top can be controlled according to needs, and it is highly practical.

[0057] Those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present application and are not intended to limit the present application. As long as they are within the spirit of the present application, appropriate changes and modifications to the above embodiments are within the scope of disclosure required by the present application.

Claims

1. A table comprising a bracket, a table top assembly and an extension device, wherein the bracket and the table top assembly are respectively connected to the extension device, characterized in that: The expansion device comprises: Covering parts; The rotating mechanism includes a rotating shaft, a fixed frame, and a locking assembly, wherein the shielding member is slidably connected to the outer periphery of the fixed frame, and the inner periphery of the fixed frame and the locking assembly are sleeved outside the rotating shaft. By rotating the shielding member, the shielding member is controlled to rise or fall relative to the fixed frame, and the locking assembly is used to lock or release the rotating shaft; The lifting mechanism includes a connecting frame, a plurality of lifting assemblies and a pressure plate. The connecting frame is rotatably connected to the rotating shaft. Each of the lifting assemblies includes a plurality of lifting frames, lifting bearings and limit bearings. The lifting bearings and limit bearings are arranged tangentially. The pressure plate is connected to the fixed frame. The pressure plate points to the tangent point of the lifting bearings and limit bearings. The pressure plate is used to support the lifting bearings and limit bearings and drive the lifting frame to rise. One end of the pressure plate is angular and the other end is an arc-shaped structure. The arc structure is concentrically arranged with the rotating shaft. The table board assembly includes a first table board, a second table board and a third table board. The first table board and the second table board are arranged on the connecting frame. The third table board is accommodated in the covering member and is fixedly arranged on the lifting assembly. The covering member is rotated to expose the third table board from the covering member. The connecting frame is driven to rotate by rotating the second table board. The pressure plate supports the lifting bearing and the limit bearing, and drives the lifting assembly to drive the third table board to extend out of the covering member and make the third table board rise to be flush with the second table board. When the lifting bearing and the limit bearing are at the end of the pressure plate, the end arc of the pressure plate points to the center of the rotating shaft, and the inner circumference of the third table board is close to the outer circumference of the second table board.

2. The table according to claim 1, wherein: The shielding member includes a plurality of connecting plates connected end to end, and the inner wall of each connecting plate is provided with a sliding groove, and each sliding groove is inclined and has the same inclination direction.

3. The table according to claim 2, wherein: The fixed frame includes a first locking position and a second locking position, which are arranged on the outer periphery of the fixed frame. The shielding member is also provided with a handle, which is used to be clamped in the first locking position or the second locking position to limit the rotation position of the shielding member.

4. The table according to claim 2, wherein: The locking assembly includes a snap ring, a rotating rod, a gripper, a push rod and an elastic member. The snap ring is sleeved on the rotating shaft. One end of the rotating rod is connected to the snap ring, and the other end is connected to the gripper. The elastic member is connected to the rotating rod and the gripper. The push rod is fixed to the connecting plate. By pushing the gripper, the snap ring is controlled to lock or release the rotating shaft.

5. The table according to claim 1, wherein: Each of the lifting assemblies includes a supporting frame and a connecting frame. The supporting frame is slidably connected to the fixed frame and the connecting frame. One end of each lifting frame is connected to the supporting frame, and the other end is connected to the connecting frame.

6. The table according to claim 5, characterized in that: The lifting bearing is mounted on the connecting bracket, and the limiting bearing is mounted on the supporting frame. The distance between the lifting bearing and the limiting bearing is adjusted by controlling the position of the pressure plate.

7. The table according to claim 5, characterized in that: The lifting frame includes a hinged first bracket, two second brackets and a third bracket, the two sides of one end of the two second brackets are respectively connected to the first bracket and the support frame, one side of the third bracket is connected to the connecting bracket, and the other side is respectively connected to the two second brackets, and the first bracket and the third bracket are located on opposite sides of the two second brackets.

8. The table according to claim 5, wherein: The fixed frame also includes a plurality of first slide rails, which are arranged to radiate outward from the center of the fixed frame. The connecting frame includes a frame body and a plurality of extension arms connected to the frame body. The frame body is connected to the rotating shaft. Each of the extension arms is provided with a second slide rail, and the support frame is slidably arranged on the first slide rail and the second slide rail respectively.

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