A lifting table

Abstract

The application provides a lifting table, belonging to the technical field of lifting tables. The table top is horizontally arranged above the bottom frame, the upper surface of the bottom frame is arrayed with support columns at the four corners, the support columns are located at the bottom of the table top, and the table top is internally provided with multiple drawers; the upper surface of the table top is sequentially paved with multiple table panels, the multiple table panels can be independently adjusted in height, the bottom of each table panel is symmetrically provided with a first support plate, the bottom of the first support plate is connected with a second support plate, and the bottom of the second support plate is connected with the inner wall of the table top; the central part of the bottom frame is provided with a drive box, and the inside of the drive box is provided with a controller and a power supply. The application sets multiple table panels on the surface of the table top, each of which can be independently adjusted in height, breaks the limitation that the table top of the traditional lifting table always remains single and flat, can flexibly adjust the table top form according to the requirements of different use scenes such as drawing, design and handcrafting, and effectively expands the use space and functional diversity of the table top.

Description

Technical Field

[0001] This invention relates to the field of height-adjustable desks, and particularly to a height-adjustable desk. Background Technology

[0002] As an indispensable piece of furniture in daily life, tables have long existed with a fixed height and a fixed tabletop. The legs of traditional tables are rigidly connected to the tabletop, and the tabletop height is not adjustable. Users can only passively adapt to the table height, and long-term use can easily lead to health problems such as cervical and lumbar spine issues due to the mismatch between table and chair height.

[0003] Existing technologies include height-adjustable desks that use electric actuators, gas springs, or lead screws to extend and retract the table legs, thereby adjusting the overall height of the desktop. This allows users to flexibly switch between sitting and standing positions. However, these desks only change the absolute height of the desktop; the desktop itself remains a single plane. The desktop's usage and function are relatively fixed, often leading to insufficient desktop space in daily life and crafting scenarios. For example, when painting, designing, or crafting, multiple tools and materials are needed simultaneously. If all are laid flat on the same plane, it not only occupies a large area but also easily leads to tools being mixed up and inconvenient to access. Therefore, the inventor proposes a height-adjustable desk. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a height-adjustable desk to solve the problem that existing height-adjustable desks can only change the absolute height of the desktop, the desktop itself always maintains a single plane structure, and the scope of use and functional form of the desktop are relatively fixed.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A height-adjustable desk includes support columns, a tabletop, and a base frame. The tabletop is horizontally positioned above the base frame. Support columns are arrayed at the four corners of the upper surface of the base frame and are located at the bottom of the tabletop. Multiple drawers are located inside the tabletop. Multiple desktop panels are sequentially laid on the upper surface of the tabletop, and each desktop panel can be independently adjusted in height. First support plates are symmetrically positioned on both sides of the bottom of each desktop panel, with second support plates connected to the bottom of the first support plates. The bottom of the second support plates is connected to the inner wall of the tabletop. A drive box is centrally located in the base frame, ensuring a centered center of gravity for the entire desk and a smoother, non-tilting lifting process. The controller and power supply are integrated inside the drive box, resulting in simple and centralized wiring, a neat and aesthetically pleasing appearance, and easy unified management and maintenance. The drive box contains the controller and power supply, and the multiple desktop panels can be independently adjusted in height. Users can flexibly adjust the height of each area according to different needs such as painting, crafting, and office work, expanding the versatility of the desktop functionality.

[0007] Optionally, the first support plate is rotatably connected to the bottom surface of the desktop board, and the first support plate and the second support plate are rotatably connected via a rotating shaft.

[0008] Optionally, the outer walls on both sides of the first support plate are symmetrically provided with inner sliding grooves, and guide sliders are slidably installed inside the inner sliding grooves.

[0009] Optionally, a rotating shaft is rotatably connected to the side wall of the guide slider in the direction of sliding out. The rotating shaft is horizontally set, and an operating rod is fixedly connected to the other end.

[0010] Optionally, the operating lever has an L-shaped structure, with a limiting block integrally formed at one end of the rotating shaft. The L-shaped structure makes it easy for fingers to grip and apply force naturally, and the operation direction is intuitive and clear. The limiting block is integrally formed with the rotating shaft, requiring no additional assembly. The structure is compact and not easily lost, making it easy to quickly complete the locking operation.

[0011] Optionally, a fixing hole is provided on the side wall of the second support plate, and the limiting block is adapted to be inserted into the fixing hole.

[0012] Optionally, the outer wall of the operating lever is provided with a retaining groove.

[0013] Optionally, a vertically installed electric telescopic rod is embedded inside the support column. The telescopic end of the electric telescopic rod is fixedly connected to an installation plate. The electric telescopic rod is embedded inside the support column, which does not occupy the external space of the table and has a simple and beautiful overall appearance. The installation plate, as an intermediate connecting part, evenly transmits the thrust of the telescopic rod to the bottom of the table, avoids local stress concentration, and ensures that the lifting process is smooth and unbiased.

[0014] Optionally, the mounting plate is threaded to the bottom end face of the table.

[0015] Optionally, the controller and power supply inside the drive box are connected to the electrically telescopic rod via wires.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] In the above solution, the present invention sets multiple independently adjustable and height-adjustable desktop panels on the table surface, and coordinates them with a linkage adjustment mechanism consisting of a first support plate, a second support plate, and an operating lever. This allows each desktop panel to be adjusted individually, breaking the limitation of traditional height-adjustable tables where the desktop always remains a single plane. The desktop shape can be flexibly adjusted according to the needs of different usage scenarios such as painting, design, and handicrafts, effectively expanding the usable space and functional diversity of the desktop. The adjustment of the desktop panels is achieved through structures such as operating levers, rotating shafts, guide sliders, and internal sliding grooves. The operation is simple, and after adjustment, the panels can be reliably locked through the insertion of limit blocks and fixed holes, ensuring good stability. The support columns on the base frame are embedded with electric telescopic rods, which are uniformly controlled by the controller in the drive box, enabling electric adjustment of the overall height of the table. This allows users to freely switch between sitting and standing postures. The overall structure combines overall desktop height adjustment with local angle adjustment, taking into account both height adaptability and desktop function flexibility, effectively solving the problems of insufficient desktop space and limited functional form of traditional height-adjustable tables. Attached Figure Description

[0018] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the height-adjustable desk;

[0020] Figure 2 This is a schematic diagram of the desktop panel lifting structure;

[0021] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0022] Figure 4 This is a schematic diagram of the operating lever and guide slider structure;

[0023] Figure 5 A schematic diagram of the fixing structure between the first support plate and the second support plate;

[0024] Figure 6 This is a schematic diagram of the base frame structure;

[0025] Figure 7 This is a schematic diagram of the table in its raised state.

[0026] Figure label:

[0027] 1. Table; 2. Support column; 3. Base frame; 4. Drive box; 5. Desktop; 6. First support plate; 7. Second support plate; 8. Rotating shaft; 9. Operating lever; 10. Inner slide groove; 12. Clip groove; 13. Guide slider; 14. Limiting block; 15. Fixing hole; 16. Mounting plate.

[0028] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0029] The present invention provides a height-adjustable desk in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0030] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when describing a specific feature, structure, or characteristic in conjunction with embodiments, the implementation of such feature, structure, or characteristic in conjunction with other embodiments, whether or not explicitly described, should be within the knowledge of those skilled in the art.

[0031] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0032] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0033] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0034] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a height-adjustable table, including support columns 2, a tabletop 1, and a base frame 3. The tabletop 1 is horizontally positioned above the base frame 3. Support columns 2 are arrayed at the four corners of the upper surface of the base frame 3, and the support columns 2 are located at the bottom of the tabletop 1. The tabletop 1 has multiple drawers inside. The base frame 3 is welded from Q235 carbon structural steel, providing sufficient load-bearing rigidity. The frame of the tabletop 1 is assembled from aluminum alloy profiles, effectively reducing the overall weight while ensuring structural strength, facilitating handling and installation. The outer shell of the drive box 4 is injection molded from ABS engineering plastic, and integrates a microcontroller, relay module, and switching power supply. The microcontroller can receive external button or remote control signals and output control commands, precisely adjusting the extension speed and stroke of the electric telescopic rod through PWM pulse width modulation. The power module converts 220V AC mains power into a safe 24V DC voltage for the entire system. Multiple desktop panels 5 are sequentially laid on the upper surface of the tabletop 1, and the desktop panels 5 can be independently adjusted in height. The bottom of the desktop panels 5 has two... A first support plate 6 is symmetrically arranged on both sides. The bottom of the first support plate 6 is connected to a second support plate 7. The bottom of the second support plate 7 is connected to the inner wall of the table 1. The tabletop 5 is made of high-density fiberboard with a non-slip and wear-resistant PVC finish. Both the first support plate 6 and the second support plate 7 are made of cold-rolled steel plate by stamping and bending. The surface is treated with electrostatic powder coating to prevent rust. There is a 2-5mm gap between each tabletop 5 so that they do not interfere with each other. A drive box 4 is located in the center of the base frame 3. The drive box 4 contains a controller and a power supply. The outer shell of the drive box 4 is made of ABS engineering plastic injection molding, with a waterproof and dustproof rating of IP54. It integrates an STM32 series microcontroller, a four-channel relay drive module, and a 24V / 5A switching power supply. The microcontroller can receive signals from the four touch buttons on the panel of the drive box 4 or 2.4G wireless remote control signals, and output PWM pulse width modulation signals to control the forward and reverse rotation and speed of the electric telescopic rod. The 24V switching power supply converts the 220V AC mains power into a safe DC voltage to power the entire lifting system.

[0035] like Figures 3-5The first support plate 6 is rotatably connected to the bottom surface of the desktop plate 5, and the first support plate 6 is rotatably connected to the second support plate 7 via a rotating shaft. The rotating shaft is made of stainless steel pin, and both ends are equipped with open retaining rings to prevent axial detachment and ensure reliable connection. The outer walls on both sides of the first support plate 6 are symmetrically provided with inner sliding grooves 10, and guide sliders 13 are slidably installed inside the inner sliding grooves 10. The effective length of the inner sliding groove 10 is 80-120mm, and the sliding stroke of the guide slider 13 in the groove directly determines the lifting stroke range of the desktop plate 5. Both the inner sliding groove 10 and the guide slider 13 are made of 45# steel. The inner surface of the groove is high-frequency quenched to HRC45-50 to improve wear resistance. The outer wall of the slider is inlaid with a self-lubricating PA66 nylon liner to reduce the sliding friction coefficient to below 0.1.

[0036] A rotating shaft 8 is rotatably connected to the side wall of the guide slider 13 in the direction of sliding out. The rotating shaft 8 is horizontally positioned, and an operating rod 9 is fixedly connected to the other end. The operating rod 9 has an L-shaped structure, and a limiting insert 14 is integrally formed at one end of the rotating shaft 8. A fixing hole 15 is provided on the side wall of the second support plate 7, and the limiting insert 14 is fitted into the fixing hole 15. A retaining groove 12 is provided on the outer wall of the operating rod 9. During operation, the user inserts their finger into the groove 12 on the outer wall of the operating lever 9, applies force to pull and rotate it. The operating lever 9 drives the rotating shaft 8 to rotate synchronously. The rotating shaft 8 drives the guide slider 13 to slide outward or inward along the inner groove 10. After adjustment, the operating lever 9 is rotated to align the limiting plug 14 and insert it into the fixed plug hole 15 on the side wall of the second support plate 7. The angle is locked by the mechanical self-locking of the plug-in engagement, preventing the desktop panel 5 from falling back under external force. The entire angle adjustment process of a single desktop panel 5 does not require any electric components. The purely mechanical structure has a rapid response and zero failure rate.

[0037] like Figure 6 , Figure 7As shown, a vertically installed electric telescopic rod is embedded inside the support column 2. The electric telescopic rod adopts a DC brushless motor driven by a ball screw transmission structure, with a rated thrust of not less than 500N and a stroke range of 600mm-1250mm, which can meet the needs of users of different heights to switch between sitting and standing postures. The ball screw pair adopts a C7-grade precision ground screw and a circulating ball nut. The telescopic end of the electric telescopic rod is fixedly connected to the mounting plate 16. The mounting plate 16 is threaded to the bottom end face of the table 1. The mounting plate 16 is laser-cut from 6061-T6 aluminum alloy plate and is fastened to the threaded hole on the bottom end face of the table 1 by four M8 high-strength bolts. Rubber shock-absorbing pads are added between the connection surfaces to effectively absorb vibrations during the lifting process. The controller and power supply in the drive box 4 are connected to the electric telescopic rod through wires. During operation, the user sends a lifting command via the touch button on the drive box 4 or the wireless remote control transmitter. After receiving the signal, the controller determines the target height using an internal algorithm and controls the electric telescopic rod to rotate forward or backward via the H-bridge drive circuit. At the same time, the built-in Hall sensor detects the actual travel of the telescopic rod in real time. When the actual height matches the target height, the power supply to the motor is automatically cut off and the brake is engaged to prevent the table 1 from sliding down due to its own weight after a power outage. The electric telescopic rods in the four support columns 2 are coordinated and synchronized by the controller to ensure that the table 1 remains horizontal during the lifting process and avoids tilting or jamming. The speed of the entire lifting process can be switched through three preset modes by the controller.

[0038] The working principle of the technical solution provided by this invention is as follows: First, the controller inside the drive box 4 located in the center of the base frame 3 activates the electric telescopic rod inside the support column 2. The telescopic end of the electric telescopic rod drives the mounting plate 16 to rise and fall. The mounting plate 16 is threadedly connected to the bottom surface of the table 1, thereby driving the entire table 1 to rise and fall vertically along the support column 2, realizing the adjustment of the absolute height of the tabletop. When it is necessary to adjust the angle of a single tabletop panel 5 locally, the tabletop panel 5 is first pulled up. As the tabletop panel 5 is continuously raised, the first support plate 6 and the second support plate 7 at its bottom flip and unfold accordingly. After flipping to a vertical state, that is... It can be fixed by holding the buckle 12 on the outer wall of the operating rod 9 and pulling it outward and rotating it. The operating rod 9 drives the rotating shaft 8 to rotate, and the rotating shaft 8 drives the guide slider 13 to slide in the inner slide groove 10 of the first support plate 6 until the operating rod 9 leaves the inner slide groove 10 and rotates downward. When the limiting plug 14 corresponds to the fixing plug 15, push the operating rod 9 in the opposite direction. The limiting plug 14 is inserted into the fixing plug 15 on the side wall of the second support plate 7 to complete the locking and fixation, preventing the desktop plate 5 from falling back on its own. The desktop plate 5 can then be adjusted. At this time, the desktop plate 5 and the upper surface of the table 1 can be used to support items.

[0039] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0040] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A height-adjustable desk, characterized in that, It includes support columns (2), table (1) and base frame (3). The table (1) is horizontally set above the base frame (3). Support columns (2) are arrayed at the four corners of the upper surface of the base frame (3). The support columns (2) are located at the bottom of the table (1). The table (1) has multiple drawers inside. The upper surface of the table (1) is covered with multiple tabletop panels (5) in sequence. The multiple tabletop panels (5) can be independently adjusted and raised. The bottom sides of the tabletop panels (5) are symmetrically provided with first support plates (6). The bottom of the first support plates (6) is connected to a second support plate (7). The bottom of the second support plate (7) is connected to the inner wall of the table (1). The base frame (3) is provided with a drive box (4) in the center, and the drive box (4) is provided with a controller and a power supply.

2. The height-adjustable desk according to claim 1, characterized in that, The first support plate (6) is rotatably connected to the bottom surface of the desktop plate (5), and the first support plate (6) and the second support plate (7) are rotatably connected by a rotating shaft.

3. The height-adjustable desk according to claim 1, characterized in that, The outer walls of the first support plate (6) are symmetrically provided with inner sliding grooves (10), and guide sliders (13) are slidably installed inside the inner sliding grooves (10).

4. The height-adjustable desk according to claim 3, characterized in that, The guide slider (13) is rotatably connected to a rotating shaft (8) on the side wall corresponding to the sliding direction. The rotating shaft (8) is horizontally set and the other end is fixedly connected to an operating rod (9).

5. The height-adjustable desk according to claim 4, characterized in that, The operating lever (9) has an L-shaped structure, and a limiting block (14) is integrally formed at one end of the principle rotating shaft (8).

6. The height-adjustable desk according to claim 5, characterized in that, The second support plate (7) has a fixed insertion hole (15) on its side wall, and the limiting plug (14) is adapted to be inserted into the fixed insertion hole (15).

7. The height-adjustable desk according to claim 4, characterized in that, The outer wall of the operating lever (9) is provided with a groove (12).

8. The height-adjustable desk according to claim 1, characterized in that, The support column (2) is internally fitted with a vertically installed electric telescopic rod, and the telescopic end of the electric telescopic rod is fixedly connected to an installation plate (16).

9. The height-adjustable desk according to claim 8, characterized in that, The mounting plate (16) is threaded to the bottom end face of the table (1).

10. The height-adjustable desk according to claim 8, characterized in that, The controller and power supply inside the drive box (4) are connected to the electric telescopic rod via wires.

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