Learning desk

Abstract

The utility model discloses a study desk. The study desk comprises a desk board and a desk top, the plurality of learning table legs are respectively connected to the lower side of the table plate; the driving devices are fixed to the desk plate and / or the learning desk legs, and the driving devices drive the learning desk legs to ascend and descend in a one-to-one correspondence mode. According to the learning table, the multiple driving devices can drive the multiple learning table legs to ascend and descend in the one-to-one correspondence mode, the lifting stability of the learning table can be improved, the operation noise of the driving devices is small, and user experience is better.

Description

Technical Field

[0001] The utility model relates to the technical field of study desks, and particularly relates to a study desk. Background Art

[0002] The study desks in the related art generally include study desk legs and a desk board. The study desk legs are connected to the lower side of the desk board, and the study desk legs can be lifted or lowered through a driving device or manually to achieve the height adjustment of the study desk.

[0003] However, the study desks in the related art generally use a single driving device to simultaneously drive multiple study desk legs to lift or lower to achieve the lifting of the study desk. With such a setting, during the process of the driving device driving the study desk legs to lift or lower, the lifting stability of the multiple study desk legs is poor, and the running noise of the single driving device is relatively large, resulting in a poor user experience. Content of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. To this end, an object of the present utility model is to provide a study desk, which can drive multiple study desk legs to lift or lower one by one through multiple driving devices, is beneficial to improving the lifting stability of the study desk, has a relatively small running noise of the driving device, and provides a better user experience.

[0005] To achieve the above object, according to an embodiment of the present utility model, a study desk is provided, including: a desk board; a plurality of study desk legs, the plurality of study desk legs are respectively connected to the lower side of the desk board; a plurality of driving devices, the driving devices are fixed to the desk board and / or the study desk legs, and the plurality of driving devices drive the plurality of study desk legs to lift or lower one by one.

[0006] According to the embodiment of the present utility model, the study desk can drive the plurality of study desk legs to lift or lower one by one through the plurality of driving devices, which is beneficial to improving the lifting stability of the study desk, has a relatively small running noise of the driving device, and provides a better user experience.

[0007] According to some embodiments of the present utility model, the study desk further includes: a controller, the controller is disposed on the desk board and / or the study desk legs, and the controller is electrically connected to the plurality of driving devices respectively.

[0008] According to some embodiments of the present utility model, the study desk leg includes: a fixed leg for placing on the ground; a lifting leg connected to the desk board, and the lifting leg is sleeved on the fixed leg in a liftable manner. The driving device is fixed to one of the lifting leg and the fixed leg, and the driving device is in transmission connection with the other of the lifting leg and the fixed leg.

[0009] According to some embodiments of the present utility model, the study desk further includes: a mounting seat, the mounting seat is connected to the lifting legs and / or the tabletop, at least a part of the driving device is arranged in the mounting seat, and at least another part of the driving device extends out of the mounting seat and is in transmission connection with the fixed legs to drive the lifting legs to lift relative to the fixed legs.

[0010] According to some embodiments of the present utility model, the mounting seat is connected between the lifting legs and the tabletop, and an avoidance hole is provided on the lower side of the mounting seat, and the at least another part of the driving device extends into the study desk legs through the avoidance hole.

[0011] According to some embodiments of the present utility model, the driving device includes: a driving member, the driving member is arranged in the mounting seat and fixedly connected to the mounting seat; a transmission mechanism, one end of the transmission mechanism is in transmission connection with the driving member, and the other end of the transmission mechanism extends out of the avoidance hole and is in transmission connection with the fixed legs to drive the lifting legs to lift relative to the fixed legs.

[0012] According to some embodiments of the present utility model, the transmission mechanism includes: a lead screw, the lead screw is in transmission connection with the output shaft of the driving member, and the lead screw extends along the length direction of the lifting legs; a lead screw nut, the lead screw nut is fixed in the fixed legs, and the lead screw is in threaded cooperation with the lead screw nut.

[0013] According to some embodiments of the present utility model, the transmission mechanism further includes: a plurality of bearing seats, the bearing seats are fixed in the fixed legs and the lead screw passes through the bearing seats, and along the axial direction of the fixed legs, the plurality of bearing seats are respectively arranged on opposite sides of the lead screw nut.

[0014] According to some embodiments of the present utility model, the study desk further includes: an anti-friction member, the anti-friction member is connected to the fixed legs and / or the lifting legs, and at least a part of the anti-friction member is clamped between the fixed legs and the lifting legs.

[0015] According to some embodiments of the present utility model, the plurality of study desk legs include a first study desk leg and a second study desk leg; and the plurality of driving devices include a first driving device and a second driving device, the first driving device is fixed to the first study desk leg and / or the tabletop to drive the first study desk leg to lift, and the second driving device is fixed to the second study desk leg and / or the tabletop to drive the second study desk leg to lift.

[0016] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0017] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0018] Figure 1 is a schematic structural diagram of a study desk according to an embodiment of the present utility model;

[0019] Figure 2 is an exploded view of the study desk according to an embodiment of the present utility model;

[0020] Figure 3 is a schematic structural diagram of a mounting base and a study desk leg according to an embodiment of the present utility model;

[0021] Figure 4 is a schematic structural diagram of a driving device according to an embodiment of the present utility model.

[0022] Reference Numerals:

[0023] 100, study desk leg; 110, first study desk leg; 120, second study desk leg; 130, fixed leg; 140, lifting leg; 150, fixed rod;

[0024] 200, driving device; 210, driving member; 220, transmission mechanism; 221, lead screw; 222, lead screw nut; 223, bearing seat; 230, coupling;

[0025] 300, mounting base; 310, avoidance hole;

[0026] 400, anti-friction member. Detailed Description of the Embodiment

[0027] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.

[0028] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 limiting the present utility model.

[0029] In the description of the present utility model, the "first feature" and the "second feature" may include one or more of such features.

[0030] In the description of the present utility model, "a plurality of" means two or more, and "several" means one or more.

[0031] The study desk according to an embodiment of the present utility model will be described below with reference to the accompanying drawings.

[0032] As Figures 1-4 shown, the study desk according to an embodiment of the present utility model includes a tabletop, a plurality of study desk legs 100, and a plurality of driving devices 200.

[0033] The plurality of study desk legs 100 are respectively connected to the lower side of the tabletop. The driving devices 200 are fixed to the tabletop and / or the study desk legs 100, and the plurality of driving devices 200 drive the plurality of study desk legs 100 to lift one by one.

[0034] Specifically, the study desk legs 100 may be fixed to the lower side surface in the thickness direction of the tabletop. By lifting and lowering the study desk legs 100 along their axial directions, the tabletop can be driven to lift and lower, and thus the height of the study desk can be adjusted to meet different needs of users.

[0035] Moreover, the study desk legs 100 are provided in plurality, and the plurality of study desk legs 100 may be arranged at intervals along the length direction or the width direction of the tabletop. In this way, the plurality of study desk legs 100 can jointly support the tabletop, which is beneficial to improving the support stability of the tabletop. In addition, adjacent two study desk legs 100 may be connected and fixed by a fixing rod 150, which further improves the support stability of the study desk legs 100 for the tabletop.

[0036] In addition, the driving devices 200 are fixed to the tabletop and / or the study desk legs 100, which means that the driving devices 200 may be fixed to the tabletop, or the driving devices 200 may be fixed to the study desk legs 100, or the driving devices may be fixed to both the tabletop and the study desk legs 100 at the same time.

[0037] For the study desk according to an embodiment of the present utility model, by driving the plurality of study desk legs 100 to lift one by one with the plurality of driving devices 200, in this way, each driving device 200 can respectively drive one study desk leg 100 to lift and lower. Compared with the related art in which one driving device drives a plurality of table legs to lift and lower, the load of the driving device 200 in this embodiment can be smaller, and thus the running noise of the driving device 200 can be reduced. Moreover, the driving force of the plurality of driving devices 200 can be greater, and the stability of driving the plurality of study desk legs 100 to lift and lower simultaneously by the plurality of driving devices 200 is higher, and the user experience is better.

[0038] In this way, according to the embodiment of the present utility model, the study desk can drive a plurality of study desk legs 100 to lift one by one through a plurality of driving devices 200, which is beneficial to improving the lifting stability of the study desk, and the running noise of the driving devices 200 is relatively small, providing a better user experience.

[0039] In some specific embodiments of the present utility model, the study desk further includes a controller, which is disposed on the tabletop and / or the study desk legs 100, and the controller is electrically connected to a plurality of driving devices 200 respectively.

[0040] Wherein, the controller is disposed on the tabletop and / or the study desk legs 100 means that the controller can be disposed on the tabletop, or the controller can be disposed on the study desk legs 100, or the controller can be disposed on both the tabletop and the study desk legs 100 at the same time.

[0041] By electrically connecting the controller to a plurality of driving devices 200 respectively, in this way, the study desk can use one controller to simultaneously control a plurality of driving devices 200, so as to synchronously control the plurality of driving devices 200 to drive the plurality of study desk legs 100 to perform lifting adjustment. The synchronization of the lifting adjustment of the plurality of study desk legs 100 is better, further improving the stability of the lifting adjustment of the study desk. Moreover, such a setting can reduce the number of components of the controller and the plurality of driving devices 200, which is not only beneficial to reducing costs, but also can make the structural setting of the controller and the driving devices 200 simpler and easier to arrange.

[0042] In some specific embodiments of the present utility model, as Figure 1 and Figure 2 shown, the study desk leg 100 includes a fixed leg 130 and a lifting leg 140.

[0043] The fixed leg 130 is used to be placed on the ground, the lifting leg 140 is connected to the tabletop, and the lifting leg 140 is sleeved on the fixed leg 130 in a liftable manner. The driving device 200 is fixed to one of the lifting leg 140 and the fixed leg 130, and the driving device 200 is in transmission connection with the other of the lifting leg 140 and the fixed leg 130.

[0044] Wherein, the driving device 200 is fixed to one of the lifting leg 140 and the fixed leg 130, and the driving device 200 is in transmission connection with the other of the lifting leg 140 and the fixed leg 130 means that the driving device 200 can be fixed to the fixed leg 130 and in transmission connection with the lifting leg 140, or the driving device 200 can be fixed to the lifting leg 140 and in transmission connection with the fixed leg 130. In addition, since the lifting leg 140 is connected to the tabletop, that is, the relative position between the lifting leg 140 and the tabletop is fixed. If the driving device 200 is set to be fixed to the lifting leg 140, the driving device 200 can also be connected and fixed to the tabletop.

[0045] Thus, the lifting leg 140 and the fixed leg 130 can be driven by the driving device 200 to telescopically move along the axial direction of the study table leg 100, and then the height of the study table leg 100 can be adjusted to realize the height adjustment of the study table.

[0046] In some specific embodiments of the present utility model, as Figures 1-3 shown, the study table further includes a mounting seat 300. The mounting seat 300 is connected to the lifting leg 140 and / or the tabletop. At least a part of the driving device 200 is disposed in the mounting seat 300, and at least another part of the driving device 200 extends out of the mounting seat 300 and is in transmission connection with the fixed leg 130 to drive the lifting leg 140 to move up and down relative to the fixed leg 130.

[0047] Among them, the mounting seat 300 being connected to the lifting leg 140 and / or the tabletop means that the mounting seat 300 can be fixed to the lifting leg 140. For example, the mounting seat 300 can be fixed to the upper end of the lifting leg 140; or, the mounting seat 300 can be fixed to the tabletop. For example, the mounting seat 300 can be disposed on the lower side of the tabletop; or, the mounting seat 300 can be connected to both the lifting leg 140 and the tabletop at the same time. With such a setting, after the driving device 200 is disposed in the mounting seat 300, it can be closer to the study table leg 100, so as to facilitate the driving device 200 to drive the lifting leg 140 to move up and down relative to the fixed leg 130.

[0048] In addition, by providing the mounting seat 300, the mounting seat 300 can be used to accommodate and fix the driving device 200. It can not only provide an installation space for the driving device 200, but also prevent the driving device 200 from being directly exposed outside, and the structural layout is more reasonable. Moreover, multiple mounting seats 300 can be provided, and the multiple mounting seats 300 correspond to the multiple study table legs 100 one by one. In this way, each mounting seat 300 can respectively accommodate and fix a driving device 200, and the assembly is more convenient.

[0049] In addition, at least another part of the driving device 200 extends out of the mounting seat 300 and is in transmission connection with the fixed leg 130. In this way, the driving device can drive the lifting leg 140 and the fixed leg 130 to relatively telescopically move, so as to drive the study table leg 100 to move up and down.

[0050] Furthermore, as Figures 1-3 shown, the mounting seat 300 is connected between the lifting leg 140 and the tabletop, and an avoidance hole 310 is provided on the lower side of the mounting seat 300. At least another part of the driving device 200 extends into the study table leg 100 through the avoidance hole 310.

[0051] That is to say, the mounting base 300 can be respectively connected to the lifting legs 140 and the tabletop, that is, the tabletop and the lifting legs 140 are connected through the mounting base 300. And by providing an avoidance hole 310 on the lower side of the mounting base 300, the avoidance hole 310 can avoid the driving device 200, and further can prevent position interference between the lower side of the driving device 200 and the mounting base 300, so as to facilitate the transmission connection between the driving device 200 and the fixed leg 130.

[0052] In some specific embodiments of the present invention, as Figure 4 shown, the driving device 200 includes a driving member 210 and a transmission mechanism 220.

[0053] The driving member 210 is disposed in the mounting base 300 and fixedly connected to the mounting base 300. One end of the transmission mechanism 220 is in transmission connection with the driving member 210, and the other end of the transmission mechanism 220 extends out of the avoidance hole 310 and is in transmission connection with the fixed leg 130 to drive the lifting leg 140 to lift relative to the fixed leg 130.

[0054] Among them, the driving member 210 can be a motor.

[0055] By disposing the driving member 210 in the mounting base 300 and fixedly connecting it to the mounting base 300, this can prevent position interference between the driving member 210 and other components, and both ends of the transmission mechanism 220 are respectively in transmission connection with the driving member 210 and the fixed leg 130. In this way, the driving member 210 can drive the lifting leg 140 and the fixed leg 130 to relatively extend and contract through the transmission mechanism 220, and further can adjust the height of the learning table leg 100 to adjust the height of the tabletop from the ground.

[0056] Furthermore, as Figure 4 shown, the transmission mechanism 220 includes a lead screw 221 and a lead screw nut 222.

[0057] The lead screw 221 is in transmission connection with the output shaft of the driving member 210, and the lead screw 221 extends along the length direction of the lifting leg 140. The lead screw nut 222 is fixed in the fixed leg 130, and the lead screw 221 is in threaded cooperation with the lead screw nut 222.

[0058] Among them, the output shaft of the driving member 210 can be in transmission connection with one end of the lead screw 221 through a coupling 230.

[0059] In this way, the driving member 210 can drive the lead screw 221 to rotate through the coupling 230. The lead screw 221 and the lead screw nut 222 are in threaded cooperation, so that the lead screw 221 and the lead screw nut 222 can move relative to each other along the axial direction of the lead screw 221, so that the fixed leg 130 and the lifting leg 140 can relatively extend and contract along the axial direction of the lead screw 221, so that the learning table leg 100 can be lifted along the axial direction of the lead screw 221.

[0060] Moreover, the transmission mechanism 220 adopts a transmission structure of a lead screw 221 and a lead screw nut 222. The transmission structure is simpler and the transmission is stable, so that the driving device 200 can drive the learning table leg 100 to lift more stably. In addition, the assembly structure of the lead screw 221 and the lead screw nut 222 with the learning table leg 100 is simple and convenient for assembly.

[0061] In addition, when the driving member 210 stops operating, the lead screw nut 222 can be locked and hover at any position of the lead screw. In this way, within the height adjustable range of the learning table, the learning table can be adjusted to any height.

[0062] Furthermore, as Figure 4 shown, the transmission mechanism 220 further includes a plurality of bearing seats 223. The bearing seats 223 are fixed inside the fixed leg 130 and the lead screw 221 passes through the bearing seats 223. Along the axial direction of the fixed leg 130, the plurality of bearing seats 223 are respectively arranged on opposite sides of the lead screw nut 222.

[0063] By arranging the plurality of bearing seats 223 on opposite sides of the lead screw nut 222 along the axial direction of the fixed leg 130, the lead screw 221 can be radially limited by the plurality of bearing seats 223, avoiding radial swing of the lead screw 221 relative to the fixed leg 130, further improving the stability of power transmission of the transmission mechanism 220, and making the lifting of the learning table leg 100 smoother.

[0064] In some specific embodiments of the present invention, as Figure 2 shown, the learning table further includes an anti-friction member 400. The anti-friction member 400 is connected to the fixed leg 130 and / or the lifting leg 140, and at least part of the anti-friction member 400 is clamped between the fixed leg 130 and the lifting leg 140.

[0065] Wherein, the anti-friction member 400 is connected to the fixed leg 130 and / or the lifting leg 140 means that the anti-friction member 400 can be connected to the fixed leg 130, or the anti-friction member 400 can be connected to the lifting leg 140, or the anti-friction member 400 can be multiple and respectively connected to the fixed leg 130 and the lifting leg 140.

[0066] In this way, the anti-friction member 400 can be used to reduce the contact area between the lifting leg 140 and the fixed leg 130, thereby reducing the frictional force between the lifting leg 140 and the fixed leg 130, making it easier for the lifting leg 140 to move up and down. Moreover, the anti-friction member 400 can fill the gap between the fixed leg 130 and the lifting leg 140. When the lifting leg 140 moves up and down relative to the fixed leg 130, the lifting leg 140 is not prone to shaking. Furthermore, the stability of the learning desk leg 100 during lifting adjustment can be improved. After the lifting is in place, the lifting leg 140 will not tilt relative to the fixed leg 130, thus avoiding shaking or tilting of the learning desk leg 100, which is beneficial to improving the stability of the learning desk and providing a better user experience.

[0067] In some specific embodiments of the present invention, as Figure 1 and Figure 2 shown, multiple learning desk legs 100 include a first learning desk leg 110 and a second learning desk leg 120.

[0068] And multiple driving devices 200 include a first driving device and a second driving device. The first driving device is fixed to the first learning desk leg 110 and / or the tabletop to drive the first learning desk leg 110 to move up and down, and the second driving device is fixed to the second learning desk leg 120 and / or the tabletop to drive the second learning desk leg 120 to move up and down.

[0069] Wherein, the first learning desk leg 110 and the second learning desk leg 120 can be arranged at intervals along the length direction of the tabletop, and the first learning desk leg 110 and the second learning desk leg 120 can be connected by a fixing rod 150. By jointly supporting the tabletop with the first learning desk leg 110 and the second learning desk leg 120, the fixing stability of the tabletop can be improved.

[0070] In addition, the first driving device can be fixed to the first learning desk leg 110, or the first driving device can be fixed to the tabletop, or the first driving device can be fixed to both the first learning desk leg 110 and the tabletop at the same time. In this way, the first driving device can be closer to the first learning desk leg 120, facilitating power transmission and convenient assembly.

[0071] Furthermore, the second driving device can be fixed to the second learning desk leg 120, or the second driving device can be fixed to the tabletop, or the second driving device can be fixed to both the second learning desk leg 120 and the tabletop at the same time. In this way, the second driving device can be closer to the second learning desk leg 120, facilitating power transmission and convenient assembly.

[0072] In this way, the first driving device and the second driving device can respectively drive the first learning table leg 110 and the second learning table leg 120 to lift, with stronger driving force, smoother lifting drive of the learning table, and smaller operating noise of the first driving device and the second driving device, resulting in a better user experience.

[0073] Other configurations and operations of the learning table according to the embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail here.

[0074] In the description of this specification, the description with reference to terms such as "specific embodiments", "specific examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0075] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A study desk, characterized in that, Comprising: Tabletop; A plurality of learning table legs (100), and the plurality of learning table legs (100) are respectively connected to the lower side of the tabletop; A plurality of driving devices (200), the driving devices (200) are fixed to the tabletop and / or the learning table legs (100), and the plurality of driving devices (200) drive the plurality of learning table legs (100) to lift one by one.

2. The learning desk according to claim 1, wherein Further comprising: A controller, the controller is arranged on the tabletop and / or the learning table legs (100), and the controller is electrically connected to the plurality of driving devices (200) respectively.

3. The learning desk according to claim 1, wherein The learning table leg (100) includes; A fixed leg (130), the fixed leg (130) is used to be placed on the ground; A lifting leg (140), the lifting leg (140) is connected to the tabletop, and the lifting leg (140) is sleeved on the fixed leg (130) in a liftable manner. The driving device (200) is fixed to one of the lifting leg (140) and the fixed leg (130), and the driving device (200) is in transmission connection with the other of the lifting leg (140) and the fixed leg (130).

4. The study desk according to claim 3, characterized in that, Further comprising: A mounting seat (300), the mounting seat (300) is connected to the lifting leg (140) and / or the tabletop. At least a part of the driving device (200) is arranged in the mounting seat (300), and at least another part of the driving device (200) extends out of the mounting seat (300) and is in transmission connection with the fixed leg (130) to drive the lifting leg (140) to lift relative to the fixed leg (130).

5. The study desk according to claim 4, wherein The mounting seat (300) is connected between the lifting leg (140) and the tabletop, and an avoidance hole (310) is arranged on the lower side of the mounting seat (300). The at least another part of the driving device (200) extends into the learning table leg (100) from the avoidance hole (310).

6. The learning desk according to claim 5, wherein, The driving device (200) includes: A driving member (210), the driving member (210) is arranged in the mounting seat (300) and is fixedly connected to the mounting seat (300); A transmission mechanism (220), one end of the transmission mechanism (220) is in transmission connection with the driving member (210), and the other end of the transmission mechanism (220) extends out of the avoidance hole (310) and is in transmission connection with the fixed leg (130) to drive the lifting leg (140) to lift relative to the fixed leg (130).

7. The study desk according to claim 6, characterized in that, The transmission mechanism (220) includes: A lead screw (221), the lead screw (221) is in transmission connection with the output shaft of the driving member (210), and the lead screw (221) extends along the length direction of the lifting leg (140); A lead screw nut (222), the lead screw nut (222) is fixed in the fixed leg (130), and the lead screw (221) is in threaded cooperation with the lead screw nut (222).

8. The study desk according to claim 7, characterized in that, The transmission mechanism (220) further includes: A plurality of bearing seats (223), the bearing seats (223) are fixed within the fixed legs (130) and the lead screw (221) passes through the bearing seats (223), and along the axial direction of the fixed legs (130), the plurality of bearing seats (223) are respectively disposed on opposite sides of the lead screw nut (222).

9. The learning desk according to claim 3, characterized in that, Further included are: An anti-friction member (400), the anti-friction member (400) is connected to the fixed leg (130) and / or the lifting leg (140), and at least a part of the anti-friction member (400) is clamped between the fixed leg (130) and the lifting leg (140).

10. The learning desk according to claim 1, characterized in that, The plurality of learning table legs (100) include a first learning table leg (110) and a second learning table leg (120); and The plurality of driving devices (200) include a first driving device (200) and a second driving device (200), the first driving device (200) is fixed to the first learning table leg (110) and / or the tabletop to drive the first learning table leg (110) to lift, and the second driving device (200) is fixed to the second learning table leg (120) and / or the tabletop to drive the second learning table leg (120) to lift.

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