WO2020133919A1

WO2020133919A1 - Flat desk

Info

Publication number: WO2020133919A1
Application number: PCT/CN2019/089878
Authority: WO
Inventors: 吴先锋; 李桂玉
Original assignee: 李桂玉
Priority date: 2018-12-26
Filing date: 2019-06-03
Publication date: 2020-07-02
Also published as: JP3224271U; CN109431073A

Abstract

A flat desk. Supporting rods (2) under a desktop board (1) comprise first supporting rods (21) and second supporting rods (22). Strip-shaped grooves (23) are provided on the inside of the supporting rods (2). The top end of a part of the strip-shaped grooves (23) arranged at the first supporting rods (21) and the bottom end of a part arranged at the second supporting rods (22) respectively are provided with fixing pins (24). Two supporting rods (2) arranged on either short side of the desktop board (1) are connected via a telescoping element (3). The telescoping elements (3) respectively are fixed on either end in the strip-shaped grooves (23) via the corresponding fixing pins (24). The telescoping elements (3) are connected to a controller (8) via driving elements. A lifting/lowering knob (41) is provided on the surface of the desktop board (1). The lifting/lowering knob (41) is connected to the controller (8). The controller (8) detects the degree of rotation of the lifting/lowering knob (41), controls the extension and retraction of the telescoping elements (3) via the driving elements, and controls the separation and joining of the first supporting rods (21) and the second supporting rods (22), thus implementing the lifting and lowering of the desktop board (1). The flat desk allows the height at which same is used to be adjusted autonomously as required for use, is applicable for people of different ages and height; moreover, the need for manual locking is obviated, and the tendency of becoming loose and unstable when being lifted/lowered is prevented.

Description

Flat table

This application requires the priority of one Chinese patent application, which is submitted to the Chinese Patent Office on December 26, 2018, with the application number 201811603657.1 and the name of the invention as "a flat table", the entire contents of which are incorporated by reference in this application.

Technical field

This application relates to the field of smart home technology, in particular to a flat table.

Background technique

A flat table is a commonly used furniture with a flat surface on top and a pillar on the bottom. You can put things on it, read books, eat, write, work, etc. The flat table has a smooth flat panel, furniture fixed by the legs and other supports. The flat table is indispensable in daily life and work, and plays a huge role. In order to meet the needs of the public, the table type is rich and diverse.

At present, the height of commonly used flat tables cannot be adjusted up and down, and cannot meet the needs of various heights. In order to achieve the purpose that the table can be raised and lowered, a lifting table appears on the market, which generally includes a base, a tabletop board, and a lifting frame installed between the base and the tabletop board, and a locking mechanism is provided on the lifting frame. At present, the locking structure used to lock the lifting frame is generally a hand-tightening bolt, that is, after the hand-tightening bolt is tightened, the lifting frame can be locked, and when the hand-tightening bolt is loosened, the height of the lifting frame can be changed to achieve Adjust the height of the desktop board.

However, the method of tightening the lifting frame by hand-tightening bolts has the disadvantage of relatively laboriousness, that is, people need to tighten the hand-tightening bolts hardly, which requires a lot of effort, and the hand-tightening bolts are prone to loosen after tightening, so there is locking The disadvantage of unreliability.

Summary of the invention

The present application provides a flat table to solve the problem that the existing flat table needs to be manually adjusted in use height and is easy to loose and unstable.

The invention provides a flat table, comprising: a table board and four supporting rods evenly distributed under the table board, and further comprising a controller and a driving part;

The support bar includes a first support bar and a second support bar; the first support bar is fixed at the bottom of the desktop board, the second support bar is located below the first support bar, and the second support bar is telescopic Connected to the first support rod; the two support rods located on the short side of the desktop board are connected by a telescopic member;

The first support rod and the second support rod are provided with a bar-shaped groove on the inner side; the bar-shaped groove is provided with a fixing pin at the top of the portion of the first support bar, and the bar-shaped groove is located on the second support bar A fixing pin is provided at the bottom end of the base, and both ends of the telescopic piece are respectively fixed in the bar grooves by corresponding fixing pins, and the telescopic piece rotates around the fixing pin; the telescopic piece is connected to the controller through the driving piece; The controller is set in the desktop board;

The control panel on the surface of the desktop board is provided with a lifting button, the lifting button is connected with a controller, the controller detects the rotation of the lifting button, controls the expansion and contraction of the telescopic member through the driving member, and controls the first support The rod and the second support rod are separated and combined to realize the rise and fall of the desktop board.

As can be seen from the above technical solutions, a flat table provided by an embodiment of the present invention includes a support bar under a desktop board including a first support bar and a second support bar, and a bar-shaped groove is provided on the inner side of the support bar; the bar-shaped groove is located at the first The top of the part of the support bar is provided with a fixing pin, and the bottom end of the part of the second support bar is provided with a fixing pin. The two support bars on the short side of the desktop board are connected by a telescopic member; the two ends of the telescopic member are It is fixed in the bar groove by the corresponding fixing pin, and the telescopic part rotates around the fixing pin; the telescopic part is connected to the controller through the driving part; the control panel on the surface of the desktop board is provided with a lifting button, and the lifting button is connected to the controller to control The device detects the rotation degree of the lifting button, controls the extension and contraction of the telescopic member through the driving member, and controls the separation and combination of the first support rod and the second support rod, so as to realize the rise and fall of the desktop board. It can be seen that the flat table provided in this embodiment can adjust the use height according to the use requirements, and is suitable for people of different ages and heights; and does not need to be manually locked by itself, and does not appear to be loose and unstable when lifting.

BRIEF DESCRIPTION

In order to more clearly explain the technical solution of the present application, the following will briefly introduce the drawings needed in the embodiments. Obviously, for those of ordinary skill in the art, without paying creative labor, Other drawings can also be obtained from these drawings.

1 is a perspective view of a flat table provided by an embodiment of this application;

2 is a side view of a flat table provided by an embodiment of this application;

3 is a top view of a flat table provided by an embodiment of this application;

4 is a partial structural schematic diagram of a support rod provided by an embodiment of the present application;

5 is a side view of the extended state of the flat table provided by the embodiment of the present application;

6 is a cross-sectional view of an upper desktop board provided by an embodiment of the present application.

detailed description

1 is a perspective view of a flat table provided by an embodiment of the present invention; FIG. 2 is a side view of a flat table provided by an embodiment of the present invention; and FIG. 3 is a top view of the flat table provided by an embodiment of the present invention.

Referring to FIG. 1, FIG. 2 and FIG. 3, a flat table provided by an embodiment of the present invention can be extended up and down to adjust the use height of the flat table to suit people of different ages and heights. Specifically, the flat table includes: a desk board 1 and four support rods 2 evenly distributed under the desk board 1, each support rod 2 is fixed at each corner of the desk board 1 for supporting the desk board 1, so that The desktop board 1 is kept stable in the horizontal direction.

In order to achieve the requirement of adjusting the height of the flat table, in this embodiment, the support bar 2 is composed of two parts, that is, the support bar 2 includes a first support bar 21 and a second support bar 22; the first support bar 21 is fixed on the tabletop At the bottom of 1, the second support bar 22 is located below the first support bar 21, the center lines of the first support bar 21 and the second support bar 22 coincide, so that the support composed of the first support bar 21 and the second support bar 22 The rod 2 can have a strong supporting force.

In order to realize the lifting between the first support rod 21 and the second support rod 22, in this embodiment, the second support rod 22 is connected to the first support rod 21 through the telescopic member 3, and the telescopic member 3 has a telescopic function. The piece 3 is telescopic, which can realize the lifting between the first support rod 21 and the second support rod 22, and further realize the use requirement of the self-adjusting height of the flat table.

When the flat table is used, in order to prevent the telescopic member 3 from interfering with the normal use of the user, the telescopic member 3 is arranged on both sides of the flat table, that is, between the two supporting rods 2 located on the short side of the table board 1 through the telescopic member 3 connection. The flat table has two telescopic pieces 3, and each telescopic piece 3 is located on two sides of the flat table respectively. The telescopic piece 3 is used to connect the two supporting rods 2 located on the side of the flat table.

To realize the expansion and contraction of the telescopic member 3 to drive the first support rod 21 to rise and fall along the second support rod 22, the two ends of the telescopic member 3 and the first support rod 21 and the second support rod 22 need to be Two support rods 2 are fixed. Therefore, in this embodiment, the strip groove 23 is provided on the opposite sides of the two support rods 2, that is, on the inner side of the first support rod 21 and the second support rod 22.

As shown in FIG. 4, the bar-shaped groove 23 is located on the first support bar 21 and the second support bar 22 together. The bar-shaped groove 23 is provided with a fixing pin 24 at the top of the portion of the first support bar 21 for fixing the telescopic member One end of the 3; the groove 23 is located at the bottom end of the portion of the second support rod 22 is provided with a fixing pin 24 for fixing the other end of the telescopic member 3. Each end of the telescopic member 3 is fixed to the two support rods 2 respectively, that is, the upper end of the telescopic member 3 is fixed in the fixing pin 24 at the upper end of the two support rods 2, and the lower end is fixed at the fixing pin 24 at the lower end of the two support rods 2 Inside.

Each supporting rod 2 is provided with two fixing pins 24, which are respectively fixed on the upper and lower ends of the bar groove 23. The connection between the telescopic element 3 and the fixed pin 24 is a shaft connection, so that the telescopic element 3 rotates around the fixed pin 24.

In order to realize the requirement of automatic height adjustment, in this embodiment, the flat table further includes a controller 8 and a driving member. The telescopic member 3 is connected to the controller 8 through the driving member; the controller 8 is provided in the desktop board 1.

As shown in FIG. 5, a control panel 4 is provided on the surface of the desktop board 1 to facilitate user control. The control panel 4 is provided with a lifting button 41. The lifting button 41 is connected to the controller 8. The controller 8 detects the rotation degree of the lifting button 41, controls the expansion and contraction of the telescopic member 3 through the driving member, and controls the first support rod 21 and the second The two support rods 22 are separated and combined to realize the ascent and descent of the desktop board 1.

Press the knob 41 clockwise to activate the automatic ascent function. The state of the lifting button 41 is detected by the signal collection module in the controller 8 in real time. When the user rotates the lifting button 41 clockwise, the signal collection module detects the signal, and after a series of analysis by the data processing module in the controller 8, A control command is sent to the execution module in the controller 8 to control the activation of the driver by the execution module. After the driving member is started, the extension member 3 is controlled to extend, and the upper end of the extension member 3 moves upward to drive the first support rod 21 to move upward and separate from the second support rod 22, thereby realizing the rise of the desktop board 1 and increasing the use height of the flat table Up.

When you press counterclockwise to turn up and down button 41, you can start the automatic lowering function. The signal collection module detects the status of the lifting button 41 in real time. When the user rotates the lifting button 41 counterclockwise, the signal collection module detects the signal and sends a control command to the controller after a series of analysis by the data processing module in the controller 8 The execution module in 8 is to be controlled by the execution module. After the drive member is started, the retractable member 3 is controlled to contract, and the upper end of the retractable member 3 moves downward, driving the first support rod 21 to move downward, combined with the second support rod 22, thereby realizing the lowering of the desktop board 1, and the flat table Use height to lower or restore the initial state.

When the lifting knob 41 rotates clockwise and counterclockwise, the signal detected by the controller 8 is different, so as to distinguish whether the user wants to increase the use height of the flat table or decrease the use height. The lifting button 41 is not unlimitedly rotatable. When the lifting height of the flat table exceeds the threshold value, the lifting button 41 will not rotate; or when the flat table has been lowered to the original state, the lifting button 41 will not rotate.

In this embodiment, the telescopic member 3 includes a first telescopic member 31 and a second telescopic member 32; both ends of the first telescopic member 31 are fixed to the two ends of the strip groove 23 by fixing pins 24, respectively. The two ends are respectively fixed to the two ends of the strip groove 23 by fixing pins 24; the first telescopic member 31 and the second telescopic member 32 are connected by a pin shaft to realize rotation.

The first telescopic element 31 and the second telescopic element 32 have the same structure and the same arrangement. Taking the first telescopic member 31 as an example, the first telescopic member 31 includes several connecting rods, and each connecting rod is sequentially connected through a shaft, so that two adjacent connecting rods can rotate. Both ends of the first telescopic member 31 are fixed in the bar groove 23 by corresponding fixing pins 24, and when installed, the two ends of the first telescopic member 31 can be fixed together in two fixing pins 24 on the same support rod 2 ; One end can also be fixed in a fixed pin 24 on a support rod 2 and the other end fixed in a fixed pin 24 on another support rod 2. The specific fixing method of the first telescopic element 31 may be determined according to the specific structure of the telescopic element, which is not specifically limited in this embodiment. The drawings show that both ends of the first telescopic element 31 are fixed to two support rods 2 On the situation.

When the use height of the flat table is increased, the first support bar 21 and the second support bar 22 will be separated, but in order to ensure the stability of the flat table after the first support bar 21 and the second support bar 22 are separated, this embodiment In between, the first support rod 21 and the second support rod 22 are connected by a fixing rod 25, and the fixing rod 25 penetrates through the first support rod 21 and the second support rod 22.

The size of the fixing rod 25 is smaller than that of the support rod 2 so that the fixing rod 25 can be inserted into the first support rod 21 and the second support rod 22. In order to fix the first support rod 21 and the second support rod 22, the fixing rod 25 can play the role of fixing the first support rod 21 and the second support rod 22, so in this embodiment, the length of the fixing rod 25 is set The total length when combined with the first support rod 21 and the second support rod 22 is the same.

Due to the large size of the flat table, in order to facilitate people of any age to move the flat table to adjust the optimal placement position, in this embodiment, a universal wheel 25 and a lock 26 are provided at the bottom of the second support rod 22 The lock 26 is used to lock the universal wheel 25. The user only needs to push the flat table, and use the universal wheel 25 to achieve movement and adjust the direction. When the position is adjusted, the lock wheel 26 is used to lock the universal wheel 25 to avoid the sudden change of the universal wheel 25 during use. Rotate and drive the flat table to ensure the stability of the flat table in use.

The surface of a flat table is usually flat, but according to different usage habits of users, such as reading books, people need the angle of eyes and writing to be within a comfortable range, so the book will be raised slightly to make the book and the desktop angle. However, this requires the user to hold the book by hand, which will increase the user's burden. Therefore, in order to improve the user's experience, in this embodiment, the desktop board 1 of the flat table can be raised at a certain angle and placed in the book When it is on the desktop, the user can hold the book, and the angle between the book and the eyes of the user can be within a comfortable range. For this reason, in this embodiment, the desktop board 1 includes an upper desktop board 11 and a lower desktop board 12, and the upper desktop board 11 is rotatably connected to the lower desktop board 12 through a rotating shaft 13 so that the upper desktop board 11 and the lower desktop board 12 are at an angle ; The rotating shaft 13 is connected to the controller 8 through the drive member.

In order to prevent the upper desktop board 11 from tilting, the book will not slide down along the desktop. The size of the upper desktop board 11 is smaller than the size of the lower desktop board 12, so that the portion of the desktop board 1 close to the body side of the user still has a flat structure.

The control panel 4 is provided with an angle knob 42 which is connected to the controller 8. The controller 8 detects the rotation of the angle knob 42 and controls the rotation of the rotating shaft 13 through the driving member to drive one end of the upper desktop board 11 to raise The lower table board 12 is angled.

Turn the angle knob 42 clockwise to activate the automatic ascent function. The signal acquisition module in the controller 8 detects the state of the angle knob 42 in real time. When the user rotates the angle knob 42 clockwise, the signal acquisition module detects the signal, and after a series of analysis by the data processing module in the controller 8, A control command is sent to the execution module in the controller 8 to control the activation of the driver by the execution module. After the driver is started, the rotating shaft 13 is controlled to rotate clockwise, which drives the upper desktop board 11 to rotate upward with the rotating shaft 13 as the origin to form an angle with the lower desktop board 12, thereby tilting the upper desktop board 11 to adjust the use angle of the desktop board 1 purpose.

When the angle knob 42 is turned counterclockwise, the automatic lowering function can be activated. The signal acquisition module detects the status of the lifting button 41 in real time. When the user rotates the angle knob 42 counterclockwise, the signal acquisition module detects the signal and sends a control command to the controller after a series of analysis by the data processing module in the controller 8 The execution module in 8 is to be controlled by the execution module. After the driver is started, the rotating shaft 13 is controlled to rotate counterclockwise, driving the upper table board 11 to rotate downward with the rotating shaft 13 as the origin, so as to reduce the angle with the lower table board 12, and then restore the upper table board 11 to a flat state. The purpose of adjusting the use angle of the desktop board 1 is achieved.

When the angle knob 42 rotates clockwise and counterclockwise, the signal detected by the controller 8 is different, so as to distinguish whether the user wants to tilt the upper table board 11 or restore the upper table board 11 to a flat state. The angle knob 42 is not infinitely rotatable. When the inclination angle of the upper plane plate 11 of the flat table exceeds the threshold value, the angle knob 42 cannot be rotated; or when the flat table has been lowered to the original state, the angle knob 42 cannot be rotated.

When the upper table board 11 is tilted, in order to be able to support the user's usage requirements and maintain the stability of the flat table, to avoid the tendency of the upper table board 11 to return to its original position due to pressure, in this embodiment, the upper The desktop board 11 and the lower desktop board 12 are connected by an auxiliary support bar 14. When the upper desktop board 11 and the lower desktop board 12 are at an angle, the auxiliary support bar 14 is used to support the upper desktop board 11.

When the upper table board 11 is tilted upward, the auxiliary support rod 14 is gradually expanded to support the upper table board 11 to avoid a downward movement trend, so as to ensure the stability of the use of the flat table.

As shown in FIG. 6, since the flat table is used for four seasons, in winter, the desktop will be relatively cold. In order to allow the user to use the flat table comfortably, in this embodiment, the desktop can be heated according to the needs of use to improve the user’s Experience. Therefore, a protective plate 5, a heating layer 6 and a heat insulation layer 7 are provided in the upper table board 11; the protective plate 5 is located on the top of the upper table board 11, and the heating layer 6 is provided below the protective board 5, and the heating layer 6 is below A heat insulation layer 7 is provided; the heating layer 6 is connected to the controller 8, and the controller is provided between the heat insulation layer 7 and the bottom of the upper table board 11.

The heating layer 6 for heating the table top is provided in the upper table board 11, in order to prevent affecting the heating temperature of the upper table board 11, a heat insulation layer 7 is provided below the heating layer 6 to prevent heat from being transferred to the lower table board 12, resulting in The temperature of the upper table board 11 is not as expected. The protective plate 5 is used to protect the heating layer 6 and also supports the pressure of the user.

The control panel 4 is provided with a temperature knob 43. The temperature knob 43 is connected to the controller 8. The controller 8 detects the rotation of the temperature knob 43 and controls the work of the heating layer 6, so that the upper table board 11 is heated or cooled.

Turn the temperature knob 43 clockwise to activate the automatic temperature rise function. The state of the temperature knob 43 is detected by the signal acquisition module in the controller 8 in real time. When the user turns the temperature knob 43 clockwise, the signal acquisition module detects the signal, and after a series of analysis by the data processing module in the controller 8, A control command is sent to the execution module in the controller 8 to control the activation of the driver by the execution module. After the driver is started, the heating layer 6 is controlled to heat, so that the surface temperature of the upper table board 11 gradually increases.

When the temperature knob 43 is turned counterclockwise, the automatic lowering function can be activated. The signal acquisition module detects the status of the lifting button 41 in real time. When the user rotates the temperature knob 43 counterclockwise, the signal acquisition module detects the signal and sends a control command to the controller after a series of analysis by the data processing module in the controller 8 The execution module in 8 is to be controlled by the execution module. After the driver is started, the heating layer 6 is controlled to reduce the degree of heating or stop heating, so that the surface temperature of the upper table board 11 gradually decreases or decreases to zero.

When the temperature knob 43 rotates clockwise and counterclockwise, the signal detected by the controller 8 is different, so as to distinguish whether the user wants to increase the temperature of the desktop or lower the temperature of the desktop. The temperature knob 43 is not infinitely rotatable. When the temperature on the surface of the flat table exceeds the threshold, the temperature knob 43 cannot be rotated to prevent the temperature from being too high and causing burns to the user's body; or when the temperature on the surface of the flat table is room temperature, the temperature The knob 43 is also not rotatable.

In addition, in order to provide the power demand when the flat table is used, in this embodiment, the flat table further includes a power supply device, and the power supply device is connected to the controller 8. The power supply device provides energy for the flat table, so that the flat table can work normally, and realize the functions of automatic lifting, adjusting angle and controlling temperature.

It can be seen from the above technical solutions that in a flat table provided by an embodiment of the present invention, the support bar 2 under the table top 1 includes a first support bar 21 and a second support bar 22, and a strip groove 23 is provided inside the support bar 2; The bar-shaped groove 23 is provided with a fixing pin 24 at the top end of the portion of the first support rod 21, a fixing pin 24 is provided at the bottom end of the portion of the second support rod 22, and two support rods 2 on the short side of the desktop board 1 They are connected by a telescopic member 3; both ends of the telescopic member 3 are fixed in the bar grooves 23 by corresponding fixing pins 24, and the telescopic member 3 rotates around the fixing pin 24; the telescopic member 3 is connected to the controller 8 through a driving member; The control panel 4 on the surface of the desktop board 1 is provided with a lifting button 41. The lifting button 41 is connected to the controller 8. The controller 8 detects the rotation degree of the lifting button 41 and controls the expansion and contraction of the telescopic member 3 through the driving member to control the first A support bar 21 and a second support bar 22 are separated and combined to realize the ascent and descent of the desktop board 1. It can be seen that the flat table provided in this embodiment can adjust the use height according to the use requirements, and is suitable for people of different ages and heights; and does not need to be manually locked by itself, and does not appear to be loose and unstable when lifting.

Claims

A flat table, comprising: a desktop board and four supporting rods evenly distributed under the desktop board, characterized in that it also includes a controller and a driving part;

The support bar includes a first support bar and a second support bar; the first support bar is fixed at the bottom of the desktop board, the second support bar is located below the first support bar, and the second support bar is telescopic Connected to the first support rod; the two support rods located on the short side of the desktop board are connected by a telescopic member;

The first support rod and the second support rod are provided with a bar-shaped groove on the inner side; the bar-shaped groove is provided with a fixing pin at the top of the portion of the first support bar, and the bar-shaped groove is located on the second support bar A fixing pin is provided at the bottom end of the base, and both ends of the telescopic piece are respectively fixed in the bar grooves by corresponding fixing pins, and the telescopic piece rotates around the fixing pin; the telescopic piece is connected to the controller through the driving piece; The controller is set in the desktop board;

The control panel on the surface of the desktop board is provided with a lifting button, the lifting button is connected with a controller, the controller detects the rotation of the lifting button, controls the expansion and contraction of the telescopic member through the driving member, and controls the first support The rod and the second support rod are separated and combined to realize the rise and fall of the desktop board.
The flat table according to claim 1, wherein the telescopic member comprises a first telescopic member and a second telescopic member; the two ends of the first telescopic member are fixed to the two ends of the strip groove by fixing pins, respectively The two ends of the second telescopic element are respectively fixed to the two ends of the strip groove by fixing pins; the first telescopic element and the second telescopic element are connected by a pin shaft to realize rotation.
The flat table according to claim 1, wherein the desktop board includes an upper desktop board and a lower desktop board, and the upper desktop board is rotatably connected to the lower desktop board through a rotating shaft to make the upper desktop board and the lower desktop board The desktop board is at an angle; the rotating shaft is connected to the controller through a driving member.
The flat table according to claim 3, characterized in that an angle knob is provided on the control panel, the angle knob is connected to a controller, the controller detects the rotation degree of the angle knob, and controls the rotation of the rotating shaft through the driving member to drive One end of the upper tabletop is raised to make an angle with the lower tabletop.
The flat table according to claim 3, wherein the upper table board and the lower table board are connected by an auxiliary support bar, and when the upper table board and the lower table board are at an angle, the auxiliary support bar is used to Support the desktop board.
The flat table according to claim 3, wherein the upper table top is provided with a protective plate, a heating layer, and a heat insulation layer; the protective plate is located on the top of the upper table top, and the lower side of the protective plate is provided There is a heating layer, and a heat insulation layer is provided below the heating layer; the heating layer is connected with a controller, and the controller is arranged between the heat insulation layer and the bottom of the upper table board.
The flat table according to claim 6, wherein a temperature knob is provided on the control panel, the temperature knob is connected to a controller, the controller detects the rotation of the temperature knob, and controls the work of the heating layer, so that The upper table board can be heated or cooled.
The flat table according to claim 1, wherein the first support rod and the second support rod are connected by a fixing rod, and the fixing rod penetrates through the first support rod and the second support rod .
The flat table according to claim 1, wherein the bottom of the second support rod is provided with a universal wheel and a lock catch, and the lock catch is used to lock the universal wheel.
The flat table according to claim 1, further comprising a power supply device, the power supply device being connected to the controller.