Hand controller for electric lifting table and electric lifting table

Abstract

The utility model discloses a hand controller for an electric lifting table and the electric lifting table, and belongs to the technical field of furniture, the hand controller comprises a base, a rotating shell rotatably arranged on the base, an electric control board fixedly arranged on the base, and a detection sensor arranged between the electric control board and the rotating shell, the electric control board is electrically connected with the detection sensor and obtains rotation angle data of the rotating shell through the detection sensor, the hand controller further comprises a pressing plate and a display screen which is kept fixed relative to the pressing plate, and the display screen is electrically connected with the electric control board and used for displaying set information; the pressing plate is arranged in the rotating shell and is in clearance fit with the inner wall of the rotating shell, a trigger button is arranged on the side, facing the pressing plate, of the electric control plate, the pressing plate can downwards press the trigger button, and the electric control plate is configured to send a corresponding lifting control signal to the electric lifting table according to the rotating angle data after the trigger button is pressed down. By means of the device, a user can conveniently and rapidly conduct screwing operation, and the lifting height is accurately controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of furniture, in particular to a hand controller for an electric lifting table and an electric lifting table. Background Art

[0002] Electric lifting tables are commonly used for desks, writing desks, kitchen countertops, etc., and the height of the tabletop can be conveniently adjusted through the electric lifting table. In related technologies, the lifting action of the electric lifting table is generally controlled by a hand controller, and structures such as mechanical switches, paddles, buttons, touch screens, and knobs are arranged on the hand controller to output operation instructions to the electric lifting table. Among them, the knob scheme is widely used because of its advantages such as not being prone to dust accumulation, not being prone to accidental triggering, and being convenient for users to operate. To ensure stability and safety, the lifting and lowering adjustment speed of the electric lifting table cannot be too fast. In related technologies, when using the knob scheme, users need to deliberately turn the knob slowly to adapt to the lifting speed of the electric lifting table, which reduces the user experience. In addition, users cannot obtain the tabletop height information of the electric lifting table during the process of turning the knob and can only rely on feeling to judge whether the adjustment is in place. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a hand controller for an electric lifting table and an electric lifting table, which can facilitate the user to quickly turn the hand controller and accurately control the lifting height.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A hand controller for an electric lifting table, the hand controller includes a base, a rotating shell rotatably arranged on the base, an electronic control board fixedly arranged on the base, and a detection sensor arranged between the electronic control board and the rotating shell. The electronic control board is electrically connected to the detection sensor and obtains the rotation angle data of the rotating shell through the detection sensor. The hand controller further includes a pressing plate and a display screen fixed relative to the pressing plate. The display screen is electrically connected to the electronic control board and is used for displaying setting information. The setting information at least includes tabletop height data corresponding to the rotation angle data;

[0006] The pressing plate is arranged in the rotating shell and is in clearance fit with the inner wall of the rotating shell. The pressing plate has an initial position and a pressing-down position relative to the rotating shell. A trigger button is arranged on one side of the electronic control board facing the pressing plate. The pressing plate is separated from the trigger button when in the initial position, and presses the trigger button when in the pressing-down position. The electronic control board is configured to be able to send a corresponding lifting control signal to the electric lifting table according to the rotation angle data after the trigger button is pressed.

[0007] Preferably, the hand controller further includes a reset member disposed between the pressing plate and the electronic control board, and the reset member presses on the pressing plate so that the pressing plate has a tendency to move towards the initial position.

[0008] Preferably, the hand controller further includes a connecting frame disposed between the pressing plate and the electronic control board. The connecting frame is slidably disposed within the rotating housing. The connecting frame includes a connecting plate. The pressing plate and the display screen are both fixed to the connecting plate, and the pressing plate covers the upper side of the display screen. The pressing plate is provided with a transparent area corresponding to the position of the display screen. The reset member is disposed between the connecting frame and the electronic control board, and the hand controller further includes a limiting structure disposed between the connecting frame and the electronic control board. The limiting structure is used to prevent the connecting frame from detaching from the electronic control board.

[0009] Preferably, the electronic control board is provided with a through hole. The limiting structure includes a vertical plate disposed on the connecting plate, a limiting claw formed on the vertical plate, and a clamping portion formed on the electronic control board near the through hole. The vertical plate passes through the through hole and is slidably disposed within the through hole. The limiting claw is engaged with the clamping portion when the pressing plate is in the initial position.

[0010] Preferably, a partition is formed on the inner peripheral wall of the rotating housing. The connecting plate and the electronic control board are respectively located on both sides of the partition. The partition is provided with an opening for the vertical plate to pass through. The reset member is an elastic column fixedly disposed on the connecting plate. The lower end of the elastic column abuts against the partition. The rotating housing is kept stable relative to the base along the axial direction of the rotating housing under the pressing action of the elastic column.

[0011] Preferably, the detection sensor is an angle sensor. The detection sensor is fixedly disposed on the electronic control board and electrically connected to the electronic control board. The detection sensor is provided with an opening for the vertical plate to pass through. The cable for the display screen to be electrically connected to the electronic control board sequentially passes through the opening and the opening.

[0012] Preferably, the base includes a bottom plate and an annular border formed on the bottom plate. The annular border and the bottom plate cooperate to form a cavity. The electronic control board is disposed within the cavity and is fixedly locked to the bottom plate by screws. The lower end surface of the rotating housing is in rotational contact with the upper end surface of the annular border.

[0013] Preferably, a lamp bead is disposed on the electronic control board. The annular border is made of a transparent material. The lamp bead is configured to emit light during the rotation of the rotating housing.

[0014] Preferably, the electronic control board is further configured to generate corresponding user height data according to the rotation angle data. The setting information further includes the user height data.

[0015] In addition, to achieve the above object, the present utility model also adopts the following technical solutions:

[0016] An electric lifting table, comprising electric lifting table legs, the electric lifting table further comprising a hand controller as described in any one of the above technical solutions, and an electronic control board in the hand controller is electrically connected to the electric lifting table legs.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] A pressing plate and a trigger button are added, and only after the trigger button is pressed down by the pressing plate will the electronic control board send a control signal to the electric lifting table. When the user operates, the rotating shell can be quickly screwed, and the desktop height data corresponding to the rotation angle data can be viewed through the display screen. When the desktop height data reaches the expected value, the rotation operation is stopped, and then the pressing plate is pressed to trigger the electronic control board to send a control signal, which is convenient for the user to quickly screw the hand controller and accurately control the lifting height. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. 1 is a schematic structural diagram of a hand controller for an electric lifting table provided by an embodiment of the present application;

[0020] Figure 2 FIG. 2 is an exploded view of the hand controller;

[0021] Figure 3 FIG. 3 is a sectional view of the hand controller;

[0022] Figure 4 FIG. 4 is an assembly schematic diagram of a connecting frame, a display screen and an electronic control board;

[0023] Figure 5 FIG. 5 is a schematic diagram of a display interface of the display screen.

[0024] Wherein, 1, base; 10, bottom plate; 11, annular edge; 12, connecting rod; 13, mounting plate; 2, rotating shell; 20, partition; 200, opening; 3, electronic control board; 30, trigger button; 31, through hole; 32, lamp bead; 4, detection sensor; 40, opening; 5, pressing plate; 50, transparent window; 6, display screen; 7, connecting frame; 70, connecting plate; 71, vertical plate; 72, limiting claw; 73, pressing column; 8, reset member. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Next, in combination with the accompanying drawings and specific embodiments, the present utility model will be further described. It should be noted that, on the premise of non-conflict, any combination can be formed between the following-described embodiments or technical features to form new embodiments. Except as otherwise specifically stated, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described by referring to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0026] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically and precisely defined.

[0027] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "connected", "communicated", "connected" should be understood in a broad sense. For example, it can be a fixed connection, or it can be connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0028] This embodiment provides a hand controller for an electric lifting table, and this hand controller can be used to control the lifting of the electric lifting table. As Figure 1 and Figure 2As shown in the figure, the hand controller includes a base 1, a rotating housing 2 rotatably arranged on the base 1, an electronic control board 3 fixedly arranged on the base 1, and a detection sensor 4 arranged between the electronic control board 3 and the rotating housing 2. The electronic control board 3 is electrically connected to the detection sensor 4 and obtains the rotation angle data of the rotating housing 2 through the detection sensor 4. The electronic control board 3 can generate corresponding lifting control signals according to the obtained rotation angle data. For example, when rotating a set angle value in the clockwise direction, a control signal capable of controlling the electric lifting table to rise by a set height value is correspondingly generated; correspondingly, when rotating a set angle value in the counterclockwise direction, a control signal capable of controlling the electric lifting table to descend by a set height value is correspondingly generated. There can be a pre-set functional correspondence between the set angle value and the set height value. The hand controller provided in this embodiment further includes a pressing plate 5 and a display screen 6 fixedly held relative to the pressing plate 5. The display screen 6 is electrically connected to the electronic control board 3 and is used to display set information, and the set information at least includes the desktop height data corresponding to the rotation angle data. Among them, the pressing plate 5 is arranged in the rotating housing 2 and is in clearance fit with the inner wall of the rotating housing 2. The pressing plate 5 has an initial position and a pressed position relative to the rotating housing 2. A trigger button 30 is arranged on the side of the electronic control board 3 facing the pressing plate 5. The pressing plate 5 is separated from the trigger button 30 when in the initial position, and the trigger button 30 is pressed when the pressing plate 5 is in the pressed position. The electronic control board 3 is configured to be able to send corresponding lifting control signals to the electric lifting table according to the rotation angle data after the trigger button 30 is pressed.

[0029] That is to say, when the hand controller provided in this embodiment is in use, after the user twists the rotating housing 2, the electric lifting table cannot be directly lifted or lowered. It is also necessary to press the pressing plate 5 to press the trigger button 30 to trigger the electronic control board 3 to send corresponding lifting control signals to the electric lifting table. The addition of the pressing plate 5 and the trigger button 30 will cause the electronic control board 3 to send control signals to the electric lifting table only after the trigger button 30 is pressed by the pressing plate 5. When operating, the user can quickly twist the rotating housing 2 and view the desktop height data corresponding to the rotation angle data through the display screen 6. When the desktop height data reaches the expected value, stop the rotation operation, and then press the pressing plate 5 to trigger the electronic control board 3 to send control signals, which is convenient for the user to quickly twist the hand controller and accurately control the lifting height.

[0030] The rotation angle data described in this embodiment refers to the angle by which the rotating shell 2 is rotated each time the user twists the rotating shell 2. When the pressing plate 5 is pressed once, the position information of the rotating shell 2 is cleared, and when the user twists the rotating shell 2 again, the counting will start over. The electronic control board 3 can obtain the rotation angle data of the rotating shell 2 by detecting the sensor 4. The electronic control board 3 can generate the desktop height data corresponding to the rotation angle data. In this way, as the user twists the rotating shell 2, the desktop height data can be dynamically displayed on the display screen 6 until the desktop height data viewed by the user meets the expectation, and then the user can stop twisting the rotating shell 2. If the user accidentally twists too much and the desktop height data exceeds the adjustment expectation, the rotating shell 2 can be twisted in the reverse direction for adjustment.

[0031] Further, to facilitate the user to accurately adjust the desktop height, the electronic control board 3 in this embodiment is further configured to be able to generate the corresponding user height data according to the rotation angle data. The setting information displayed on the display screen 6 described above further includes the user height data. That is, after obtaining the rotation angle data, the electronic control board 3 can not only generate the desktop height data according to the rotation angle data, but also generate the user height data according to the rotation angle data. It should be noted that both the user height data and the desktop height data correspond to the rotation angle data. Through the above design, when the user twists the rotating shell 2, the user height data obtained by converting the rotation angle data can be displayed on the display screen 6. At the same time, the desktop height data adapted to both the rotation angle data and the user height data can also be displayed on the display screen 6. The conversion relationship between the desktop height data and the user height data can be obtained by the enterprise through experimental research and user feedback from market research. Figure 5 As shown in [reference], after the user twists the rotating shell 2 to a certain angle value, the corresponding height of 136 cm and the recommended desktop height value of 74.2 cm preset to match this height are obtained. Through the above design, by presetting the height value corresponding to the user height data, a reference standard can be given to the user, and the electric lifting table can be directly controlled by the electronic control board 3 to lift and lower to this height, reducing the number of times the user tries to adjust by relying on their own feeling and improving the operation convenience.

[0032] As shown in [reference], Figure 3 the hand controller further includes a reset member 8 disposed between the pressing plate 5 and the electronic control board 3. The reset member 8 applies pressure to the pressing plate 5 so that the pressing plate 5 has a tendency to move to the initial position. In this way, after the user completes the pressing operation, the pressing plate 5 can be driven by the reset member 8 to return to the initial position.

[0033] Specifically in this embodiment, the hand controller further includes a connecting frame 7 disposed between the pressing plate 5 and the electronic control board 3. The connecting frame 7 is slidably disposed within the rotating housing 2. The connecting frame 7 includes a connecting plate 70. Both the pressing plate 5 and the display screen 6 are fixed to the connecting plate 70, and the pressing plate 5 covers the upper side of the display screen 6. The pressing plate 5 is provided with a transparent area corresponding to the position of the display screen 6. Specifically, as Figure 1 shown, a transparent window 50 is provided on the pressing plate 5, and directly below the transparent window 50 is the display screen 6 fixedly installed on the connecting plate 70. The display screen 6 can be snap-fitted into a positioning groove provided on the connecting plate 70, and the pressing plate 5 can be fixedly installed on the connecting plate 70 by means of glue or a snap structure. In this way, when the user presses down the pressing plate 5, it can drive the pressing plate 5, the connecting frame 7, and the display screen 6 to move downward as a whole. It is easy to understand that through the above design, during the pressing-down action, the connecting frame 7 directly contacts the trigger button 30 on the electronic control board 3. As Figure 4 shown, in this embodiment, a pressing post 73 is further provided on the side of the connecting plate 70 facing the electronic control board 3. After pressing down the pressing plate 5, the pressing post 73 moves downward to contact and press down the trigger button 30.

[0034] The aforementioned reset member 8 is disposed between the connecting frame 7 and the electronic control board 3, and the hand controller further includes a limiting structure disposed between the connecting frame 7 and the electronic control board 3. The limiting structure is used to limit the connecting frame 7 from detaching from the electronic control board 3. That is, the reset member 8 has an upward acting force on the connecting frame 7 and the pressing plate 5. To prevent the connecting frame 7 and the pressing plate 5 from detaching from the electronic control board 3 and the base 1 fixed to the electronic control board 3, a limiting structure is provided between the connecting frame 7 and the electronic control board 3. Combining Figure 3 and Figure 4 shown, the electronic control board 3 is provided with a through hole 31. The limiting structure includes a vertical plate 71 provided on the connecting plate 70, a limiting claw 72 formed on the vertical plate 71, and a clamping portion formed on the electronic control board 3 near the through hole 31. The vertical plate 71 passes through the through hole 31 and is slidably disposed within the through hole 31. It is easy to understand that the clamping portion is the part of the lower surface of the electronic control board 3 near the through hole 31. When the pressing plate 5 is in the initial position, the limiting claw 72 is in the highest position. At this time, the limiting claw 72 is engaged with the clamping portion, which can limit the connecting frame 7 and the pressing plate 5 fixed to the connecting frame 7 from moving upward further.

[0035] Combining Figure 2 and Figure 3As shown, in this embodiment, the rotating shell 2 is kept stable relative to the base 1 along the axial direction of the rotating shell 2 under the pressing action of the reset member 8. Specifically, a partition 20 is formed on the inner circumferential wall of the rotating shell 2 in this embodiment. The connecting plate 70 and the electronic control board 3 are respectively located on both sides of the partition 20. The partition 20 is provided with an opening 200 for the vertical plate 71 to pass through. The reset member 8 is an elastic column fixedly arranged on the connecting plate 70, and the lower end of the elastic column abuts against the partition 20. The lower end of the rotating shell 2 is rotatably arranged on the base 1, the electronic control board 3 is fixedly arranged on the base 1, and the connecting frame 7 and the pressing plate 5 fixed on the connecting frame 7 are kept stable relative to the electronic control board 3 in the circumferential and radial directions. The rotating shell 2 and the pressing plate 5 are in clearance fit. Restricted by the pressing plate 5, the rotating shell 2 can be kept stable relative to the base 1 in the radial direction. In addition, under the pressing action of the reset member 8 on the partition 20, the rotating shell 2 is kept stable relative to the base 1 along the axial direction of the rotating shell 2.

[0036] Specifically, the detection sensor 4 in this embodiment is an angle sensor. The detection sensor 4 is fixedly arranged on the electronic control board 3 and electrically connected to the electronic control board 3. An angle sensor generally includes a detection element with a shaft hole and a rotating shaft extending into the shaft hole. When the rotating shaft rotates a certain angle (related to the accuracy of the angle sensor), the detection element will count, and thus the rotation angle of the rotating shaft can be obtained. In use, the detection element is electrically connected to the electronic control board 3, and the rotating shaft is fixedly assembled with the rotating shell 2. When the rotating shell 2 is rotated, it will drive the rotating shaft to rotate, and thus the rotation angle data of the rotating shell 2 can be detected by the detection element.

[0037] In this embodiment, an opening 40 for the vertical plate 71 to pass through is also provided in the detection sensor 4. The display screen 6 is used for the cable electrically connected to the electronic control board 3 to pass through the opening 200 and the opening 40 in sequence. By providing the opening 40 and the opening 200, it is convenient for the display screen 6 to be electrically connected and assembled with the electronic control board 3.

[0038] The base 1 in this embodiment includes a bottom plate 10 and an annular edge 11 formed on the bottom plate 10. The annular edge 11 and the bottom plate 10 cooperate to form a cavity. The electronic control board 3 is arranged in the cavity and is fixedly locked to the bottom plate 10 by screws. The lower end surface of the rotating shell 2 is in rotational contact with the upper end surface of the annular edge 11. Specifically, a connecting rod 12 is further formed on the bottom plate 10, a threaded hole is provided on the connecting rod 12, and a mounting hole is provided on the electronic control board 3. The screw passes through the mounting hole and is locked in the threaded hole.

[0039] It should be noted that the above "upper" and "lower" orientations in this embodiment are based on Figure 3 the placement form of the hand controller shown, that is, the side where the base 1 is located in the hand controller is set as the lower side, and the side where the display screen 6 is located is set as the upper side.

[0040] In this embodiment, a lamp bead 32 is further arranged on the electronic control board 3. At the same time, the annular edge 11 is made of a transparent material, and the lamp bead 32 is configured to emit light during the rotation of the rotating shell 2. In this way, when the user rotates the rotating shell 2, the user can confirm whether the operation is effective through the light emitted by the lamp bead 32.

[0041] This hand controller can be applied to an electric lifting table. The electric lifting table includes electric lifting table legs, and the electronic control board 3 in the hand controller is electrically connected to the electric lifting table legs. The user rotates the rotating shell 2 and confirms the data (user height data or tabletop height data) through the display screen 6. After the data reaches the expectation, the user presses the pressing plate 5, and then the corresponding control instruction can be sent to the electric lifting table legs through the electronic control board 3 to control the lifting of the electric lifting table legs.

[0042] To facilitate the assembly of the hand controller and the table body in the electric lifting table, the base 1 in this embodiment further includes a mounting plate 13 formed on the bottom plate 10. During assembly, the hand controller can be locked and fixed to the table body by screws passing through the mounting holes on the mounting plate 13.

[0043] Finally, it should be noted that the above embodiments are only optional embodiments of the present invention, and the protection scope of the present invention cannot be limited by this. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention belong to the protection scope required by the present invention.

Claims

1. A hand controller for an electric lifting table, the hand controller comprising a base, a rotating shell rotatably arranged on the base, an electronic control board fixedly arranged on the base, and a detection sensor arranged between the electronic control board and the rotating shell, the electronic control board being electrically connected to the detection sensor and obtaining the rotation angle data of the rotating shell through the detection sensor, characterized in that, The hand controller further includes a pressing plate and a display screen fixedly held relative to the pressing plate. The display screen is electrically connected to the electronic control board and is used for displaying setting information, and the setting information at least includes tabletop height data corresponding to the rotation angle data. The pressing plate is disposed inside the rotating housing and is in clearance fit with the inner wall of the rotating housing. The pressing plate has an initial position and a depressed position relative to the rotating housing. A trigger button is disposed on one side of the electronic control board facing the pressing plate. The pressing plate is separated from the trigger button when in the initial position, and presses the trigger button when in the depressed position. The electronic control board is configured to be able to send a corresponding lifting control signal to the electric lifting table according to the rotation angle data after the trigger button is pressed.

2. The hand controller according to claim 1, characterized in that, The hand controller further includes a reset member disposed between the pressing plate and the electronic control board, and the reset member presses on the pressing plate so that the pressing plate has a tendency to move towards the initial position.

3. The hand controller according to claim 2, characterized in that, The hand controller further includes a connecting frame disposed between the pressing plate and the electronic control board. The connecting frame is slidably disposed inside the rotating housing. The connecting frame includes a connecting plate. The pressing plate and the display screen are both fixed on the connecting plate, and the pressing plate covers the upper part of the display screen. The pressing plate is provided with a transparent area corresponding to the position of the display screen. The reset member is disposed between the connecting frame and the electronic control board, and the hand controller further includes a limiting structure disposed between the connecting frame and the electronic control board, and the limiting structure is used to limit the connecting frame from separating from the electronic control board.

4. The hand controller according to claim 3, characterized in that, The electronic control board is provided with a through hole. The limiting structure includes a vertical plate disposed on the connecting plate, a limiting claw formed on the vertical plate, and a clamping portion formed on the electronic control board near the through hole. The vertical plate passes through the through hole and is slidably disposed in the through hole, and the limiting claw is engaged with the clamping portion when the pressing plate is in the initial position.

5. The hand controller according to claim 4, wherein A partition is formed on the inner circumferential wall of the rotating housing. The connecting plate and the electronic control board are respectively located on both sides of the partition. The partition is provided with an opening for the vertical plate to pass through. The reset member is an elastic column fixedly disposed on the connecting plate, and the lower end of the elastic column abuts against the partition. The rotating housing is kept stable along the axial direction of the rotating housing relative to the base under the pressing action of the elastic column.

6. The hand controller according to claim 5, characterized in that, The detection sensor is an angle sensor. The detection sensor is fixedly disposed on the electronic control board and is electrically connected to the electronic control board. The detection sensor is provided with an opening for the vertical plate to pass through. The cable for the display screen to be electrically connected to the electronic control board sequentially passes through the opening and the opening.

7. The hand controller according to any one of claims 1 to 6, characterized in that, The base includes a bottom plate and an annular edge formed on the bottom plate. The annular edge and the bottom plate cooperate to form a cavity. The electronic control board is disposed in the cavity and is fixedly locked to the bottom plate by screws. The lower end surface of the rotating housing is in rotational contact with the upper end surface of the annular edge.

8. The hand controller according to claim 7, wherein Light beads are disposed on the electronic control board. The annular edge is made of a transparent material, and the light beads are configured to be able to emit light during the rotation of the rotating housing.

9. The hand controller according to any one of claims 1 to 6, characterized in that, The electronic control board is further configured to be able to generate corresponding user height data according to the rotation angle data, and the setting information further includes the user height data.

10. Electric lifting table, including electric lifting table legs, characterized in that, The electric lifting table further includes a hand controller as described in any one of claims 1 to 9, and the electronic control board in the hand controller is electrically connected to the electric lifting table legs.

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