Modular lifting mechanism for a lifting chair

Abstract

The utility model relates to the technical field of lifting chair, concretely to a modularization lifting mechanism for lifting chair, including support column and electric telescopic device, the top of support column is equipped with the installation cylinder, the bottom of support column is equipped with the support seat, the bottom of support column is equipped with the installation slot, the installation slot with the installation cylinder between is equipped with the through slot, be equipped with weight sensor on the installation slot, be equipped with the locating plate between weight sensor with the through slot, the locating plate extends to the installation cylinder and top and is equipped with the locating slot, the output of electric telescopic device is equipped with the butt joint board and is located on the locating slot, the both sides of locating slot are equipped with the locating hole, this structure passes through the modularization design, only needs to pull down the tooth column and to separate annular tooth groove in the later maintenance, rotates and takes down the threaded column to be able to split weight sensor and electric telescopic device, greatly reduces the operation difficulty of overhaul replacement, shortens the maintenance time.

Description

Technical Field

[0001] This utility model relates to the field of lifting chair technology, specifically a modular lifting mechanism for lifting chairs. Background Technology

[0002] As is well known, the lifting mechanisms of existing height-adjustable chairs generally suffer from low structural integration and cumbersome assembly and maintenance. Traditional lifting mechanisms often use welding or multiple sets of bolts to rigidly connect the drive components, such as electric push rods, to the support structure. This requires multiple calibrations and positioning during assembly, which is time-consuming and labor-intensive. Furthermore, core components such as sensors and drive devices are integrated with the support column. When a component fails, the entire lifting mechanism must be disassembled, or even the entire support frame must be replaced, resulting in high maintenance costs and complex operations. Meanwhile, the locking mechanisms of existing systems mostly rely on a single threaded connection. Over long-term use, vibration and load impacts can cause the threads to loosen, leading to displacement of the lifting position or structural swaying, posing safety hazards. Furthermore, most lifting mechanisms lack load monitoring capabilities, failing to detect the weight of the seat surface in real time and making overload protection difficult. Overloading can potentially cause mechanical damage or safety accidents. Furthermore, traditional lifting mechanisms suffer from poor component versatility. Different sizes of lifting chairs require specialized support structures and drive components, necessitating customized manufacturing processes, which hinders standardized production and cost control. Therefore, there is an urgent need for a lifting mechanism with modular rapid assembly, stable locking, load monitoring, and convenient maintenance functions to address the problems of low assembly efficiency, difficult maintenance, and insufficient safety in existing technologies. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a modular lifting mechanism for a height-adjustable chair.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a modular lifting mechanism for a height-adjustable chair, comprising a support column and an electric telescopic device. The support column has a mounting cylinder at its top and a support base at its bottom. A mounting groove is formed at the bottom of the support column. A through groove is formed between the mounting groove and the mounting cylinder. A weight sensor is provided on the mounting groove. A positioning plate is provided between the weight sensor and the through groove. The positioning plate extends into the mounting cylinder and has a positioning groove at its top. The output end of the electric telescopic device has a docking plate that abuts against the positioning groove. Positioning holes are formed on both sides of the positioning groove. A docking hole is formed on the docking plate. A threaded hole is formed on one side of the mounting cylinder. A threaded post is provided on the threaded hole. The threaded post passes through the positioning hole and the docking hole. An annular toothed groove is formed on the outer wall of the threaded post. A lifting groove is formed between the threaded hole and the bottom of the mounting cylinder. A toothed post is provided on the lifting groove. The toothed post meshes with and abuts against the annular toothed groove. An elastic support mechanism is provided between the toothed post and the lifting groove.

[0005] Furthermore, the present invention is improved in that the elastic support mechanism includes a fastening groove and a fastening plate. The fastening groove is opened on one side of the lifting groove, the fastening plate is located in the fastening groove and fixed on one side of the tooth column, and a compression spring is provided between the bottom end of the fastening plate and the bottom end of the fastening groove.

[0006] Furthermore, the present invention is improved by providing a rubber ring at the top end of the mounting cylinder.

[0007] Furthermore, an improvement of this utility model is that the rubber ring is made of a high and low temperature resistant rubber material.

[0008] Furthermore, the present invention is improved in that the compression spring is provided in two parts and arranged symmetrically.

[0009] Furthermore, an improvement of this utility model is that the electric telescopic device is an electric push rod.

[0010] Furthermore, the present invention is improved by providing an anti-slip silicone pad at the bottom of the support base, wherein the bottom of the anti-slip silicone pad is uniformly provided with anti-slip texture.

[0011] Compared with the prior art, this utility model provides a modular lifting mechanism for a height-adjustable chair, which has the following advantages: This adjustable chair utilizes a modular lifting mechanism. Through the slotted engagement of the positioning plate and mounting cylinder, and the precise alignment of the threaded post with the positioning hole and mating hole, the weight sensor and electric telescopic device can be quickly positioned and installed using a standardized structure. Assembly of core components can be completed without complex adjustments. For later maintenance, simply pull down the toothed post to disengage it from the annular toothed groove, and rotate to remove the threaded post to disassemble the component. This significantly reduces the difficulty of inspection and replacement, and shortens maintenance time. The threaded post achieves rigid fixation of the component through the positioning hole and mating hole. Under the action of the elastic support mechanism, the toothed post remains tightly engaged with the annular toothed groove of the threaded post, effectively preventing the threaded post from loosening due to vibration, load changes, or long-term use, and avoiding structural slippage during lifting. Simultaneously, the weight sensor monitors the load weight in real time and can trigger the electric telescopic device to achieve overload protection, further enhancing safety. Attached Figure Description

[0012] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a schematic diagram of the second-view structure of the present invention; Figure 3 This utility model Figure 1 Enlarged front half-sectional view of the central support column; Figure 4 This utility model Figure 1 Enlarged left half-section view of the central support column.

[0013] In the diagram: 1. Support column; 2. Electric telescopic device; 3. Mounting cylinder; 4. Support base; 5. Weight sensor; 6. Positioning plate; 7. Positioning hole; 8. Docking hole; 9. Threaded column; 10. Annular toothed groove; 11. Toothed column; 12. Fastening plate; 13. Compression spring; 14. Rubber ring; 15. Anti-slip silicone pad. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1-4This utility model relates to a modular lifting mechanism for a height-adjustable chair, comprising a support column 1 and an electric telescopic device 2. The support column 1 has a mounting cylinder 3 at its top and a support base 4 at its bottom. A mounting groove is formed at the bottom of the support column 1, and a through groove is formed between the mounting groove and the mounting cylinder 3. A weight sensor 5 is mounted on the mounting groove, and a positioning plate 6 is positioned between the weight sensor 5 and the through groove. The positioning plate 6 extends into the mounting cylinder 3 and has a positioning groove at its top. The output end of the electric telescopic device 2 has a docking plate that abuts against the positioning groove. Positioning holes 7 are formed on both sides of the positioning groove, and docking holes 8 are formed on the docking plate. A threaded hole is formed on one side of the mounting cylinder 3. A threaded post 9 is provided on the threaded hole, passing through the positioning hole 7 and the mating hole 8. An annular toothed groove 10 is formed on the outer wall of the threaded post 9. A lifting groove is formed between the threaded hole and the bottom end of the mounting cylinder 3. A toothed post 11 is provided on the lifting groove, meshing and abutting against the annular toothed groove 10. An elastic support mechanism is provided between the toothed post 11 and the lifting groove. In this embodiment, firstly, the weight sensor 5 is inserted into the through groove through the positioning plate 6, thereby extending the top end of the positioning plate 6 into the mounting cylinder 3. At this time, the positioning hole 7 of the positioning plate 6 is aligned with the threaded hole. Then, the mating plate at the output end of the electric telescopic device 2 is inserted into the mounting cylinder 3 and abuts against the positioning groove, thereby aligning the mating hole 8 of the mating plate with the threaded hole. Align the threaded hole and the positioning hole 7 to quickly assemble the electric telescopic device 2 and the weight sensor 5 into the designated position. Then, pull down the toothed column 11, causing the elastic support mechanism to contract and deform under the downward force. The toothed column 11 moves downward away from the threaded hole, and then the threaded column 9 is threaded into the threaded hole. One end of the threaded column 9 passes through the two positioning holes 7 and the mating hole 8, thus fixing the electric telescopic device 2 and the weight sensor 5. At this time, the annular groove of the threaded column 9 is aligned with the toothed column 11. Release the toothed column 11, and the elastic support mechanism will provide an upward elastic support force to the toothed column 11, causing the toothed column 11 to move upward and reset. The top of the toothed column 11 engages with the annular tooth groove 10 to prevent the threaded column 9 from becoming loose. This design ensures structural stability and enables modular, rapid assembly of the weight sensor 5 and the electric telescopic device 2. During later maintenance, the weight sensor 5 and support column 1 can be quickly removed simply by pulling down the toothed column 11, disengaging it from the annular toothed groove 10, and then rotating the threaded column 9 to remove it from the threaded hole. This facilitates the inspection and replacement of the electric telescopic device 2 or the weight sensor 5. The telescopic movement of the electric telescopic device 2 enables the lifting operation of this structure when assembled on a lifting chair. The weight sensor 5 can detect the load weight in real time. The mounting components of the lifting chair are fitted and fixed to the top of the electric telescopic device 2 using common screw and other component installation methods found in existing technologies, which will not be described in detail here.

[0016] To provide continuous elastic thrust to the toothed column 11, in this design, the elastic support mechanism includes a fastening groove and a fastening plate 12. The fastening groove is located on one side of the lifting groove, and the fastening plate 12 is located in the fastening groove and fixed to one side of the toothed column 11. A compression spring 13 is provided between the bottom end of the fastening plate 12 and the bottom end of the fastening groove. In its natural state, the compression spring 13 pushes the fastening plate 12 upward, causing the toothed column 11 to always tightly mesh with the annular tooth groove 10 of the threaded column 9, forming an elastic preload. The elastic preload ensures that the toothed column 11 and the annular tooth groove 10 mesh without gaps, preventing the threaded column 9 from loosening due to vibration or external force, and improving the fatigue resistance and reliability of the locking structure. When in use, the toothed column 11 is pulled downward, and the toothed column 11 leaves the toothed ring. The toothed column 11 drives the fastening plate 12 to move downward, thereby causing the compression spring 13 to be squeezed and deformed in the fastening groove. After the toothed column 11 is released, the compression spring drives the toothed column 11 to automatically return to its original position through the elastic support force.

[0017] To ensure the sealing between the mounting cylinder 3 and the electric telescopic device 2, a rubber ring 14 is provided at the top of the mounting cylinder 3 in this design. The rubber ring 14 at the top of the mounting cylinder 3 fills the gap between the mounting cylinder 3 and the electric telescopic device 2 through its own elastic deformation, forming a buffer layer. This reduces the hard contact collision between the mounting cylinder 3 and the upper structure during lifting and adjustment, thus reducing noise. At the same time, it prevents dust and liquid from entering the interior of the mounting cylinder 3, protecting the internal components. The rubber ring 14 is made of high and low temperature resistant rubber material, which has excellent temperature stability. It can still maintain elasticity and structural strength in environments ranging from -40℃ to 120℃, and is not prone to hardening, cracking, or softening due to temperature changes, thus extending the service life of the rubber ring 14 and enabling it to stably perform its buffering and sealing functions in both high and low temperature environments.

[0018] To further stabilize the elastic support tooth column 11, in this design, two compression springs 13 are provided and symmetrically arranged. The two symmetrically arranged compression springs 13 apply a balanced upward elastic force to the fastening plate 12 to ensure that the force on both sides of the tooth column 11 is consistent.

[0019] To improve the accuracy and stability of lifting and moving, in this solution, the electric telescopic device 2 is an electric push rod. As a mature linear drive component, the electric push rod achieves linear extension and retraction at the output end through motor-driven lead screw transmission, and has the characteristics of stable thrust, controllable stroke, and fast response speed.

[0020] To improve the overall stability of the structure, in this design, the bottom of the support base 4 is provided with an anti-slip silicone pad 15. The bottom of the anti-slip silicone pad 15 is evenly provided with anti-slip textures. The anti-slip silicone pad 15 at the bottom of the support base 4 utilizes the high coefficient of friction of silicone material, combined with the evenly distributed anti-slip textures at the bottom, to increase the friction with the ground. The elastic deformation of silicone can also adapt to the slight unevenness of the ground.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular lifting mechanism for a height-adjustable chair, comprising a support column (1) and an electric telescopic device (2), characterized in that, The top of the support column (1) is provided with an installation cylinder (3), and the bottom of the support column (1) is provided with a support base (4). The bottom of the support column (1) is provided with an installation groove. A through groove is provided between the installation groove and the installation cylinder (3). A weight sensor (5) is provided on the installation groove. A positioning plate (6) is provided between the weight sensor (5) and the through groove. The positioning plate (6) extends into the installation cylinder (3) and has a positioning groove at its top. The output end of the electric telescopic device (2) is provided with a docking plate and abuts against the positioning groove. Positioning grooves are provided on both sides of the positioning groove. Hole (7), the mating plate is provided with a mating hole (8), the mounting cylinder (3) is provided with a threaded hole on one side, the threaded hole is provided with a threaded post (9), the threaded post (9) passes through the positioning hole (7) and the mating hole (8), the outer wall of the threaded post (9) is provided with an annular toothed groove (10), a lifting groove is provided between the threaded hole and the bottom end of the mounting cylinder (3), the lifting groove is provided with a toothed post (11), the toothed post (11) meshes and abuts against the annular toothed groove (10), and an elastic support mechanism is provided between the toothed post (11) and the lifting groove.

2. The modular lifting mechanism for a height-adjustable chair according to claim 1, characterized in that, The elastic support mechanism includes a fastening groove and a fastening plate (12). The fastening groove is opened on one side of the lifting groove. The fastening plate (12) is located in the fastening groove and fixed on one side of the toothed column (11). A compression spring (13) is provided between the bottom end of the fastening plate (12) and the bottom end of the fastening groove.

3. The modular lifting mechanism for a height-adjustable chair according to claim 1, characterized in that, The top end of the mounting cylinder (3) is provided with a rubber ring (14).

4. The modular lifting mechanism for a height-adjustable chair according to claim 3, characterized in that, The rubber ring (14) is made of high and low temperature resistant rubber material.

5. A modular lifting mechanism for a height-adjustable chair according to claim 2, characterized in that, The compression spring (13) is provided in two symmetrical arrangements.

6. A modular lifting mechanism for a height-adjustable chair according to claim 1, characterized in that, The electric telescopic device (2) is an electric push rod.

7. A modular lifting mechanism for a height-adjustable chair according to claim 1, characterized in that, The bottom end of the support base (4) is provided with an anti-slip silicone pad (15), and the bottom end of the anti-slip silicone pad (15) is uniformly provided with anti-slip texture.

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