High-stability ergonomic office chair

Abstract

The invention particularly relates to a high-stability ergonomic office chair, and belongs to the field of office chairs, the high-stability ergonomic office chair comprises an armrest, the armrest comprises a support plate and a multi-angle hovering column; the multi-angle hovering column comprises an elastic rubber sleeve and a hovering supporting column, the hovering supporting column is sleeved with the elastic rubber sleeve, one end of the hovering supporting column is assembled on the ergonomic office chair body, and the other end of the hovering supporting column is assembled on the supporting plate; the hovering supporting column comprises a supporting top cover, a telescopic column and a supporting base, the supporting top cover is assembled at the bottom of the supporting plate, and the supporting base is assembled on the ergonomic office chair main body; the telescopic column is assembled between the supporting top cover and the supporting base, and the telescopic column is spherically hinged to the supporting top cover and the supporting base; the supporting top cover and the supporting base are each provided with a limiting structure. The arm can be suspended and supported at any position in multiple dimensions, it is guaranteed that the armrest can support the arm at any angle and at any position through the simplest structure, and the use stability is improved.

Description

Technical Field

[0001] This invention relates to the field of office chairs, specifically to a highly stable ergonomic office chair. Background Technology

[0002] Ergonomic office chairs, also known as ergonomic chairs, are specialized seats designed based on ergonomic principles to provide health support for those who work at desks for extended periods. Their core design concept is to reduce muscle strain and spinal pressure caused by prolonged sitting by actively intervening in and supporting the user's posture. Among the many components of an ergonomic office chair, the armrests, as key components that directly support the user's arms and affect shoulder and neck comfort, have always been a focus of research and development in terms of adjustability. To meet users' personalized needs for arm support position and angle in different work scenarios (such as typing, reading, and reclining), the industry has developed various complex multi-degree-of-freedom adjustable armrests. Existing technical solutions mainly focus on expanding the adjustment dimensions and range of the armrests, generally achieved by superimposing multiple independent mechanical adjustment modules on a single arm.

[0003] Current mainstream high-end adjustable armrest technologies generally pursue multi-dimensional adjustment capabilities. These adjustments typically include: height adjustment (achieved through gear screws or pin locking mechanisms), fore-aft adjustment, left-right width adjustment, planar rotation, and linkage or angle adjustment with the chair back tilt. For example, some advanced designs adopt the "6D bionic joint armrest" concept, integrating multiple functions such as up-down, fore-aft, horizontal rotation, inward-outward translation, vertical rotation, and synchronized tilting, aiming to achieve a comprehensive fit for the arms. Another approach decomposes the armrest into a hinged structure of a "first support component" (supporting the arm) and a "second support component" (supporting the elbow), equipped with a precision positioning structure with stop teeth and locking teeth, to achieve segmented support for the arms and elbows when tilting back, preventing the arms from slipping. A common feature of these solutions is the use of multiple structural layers to achieve broader adaptability.

[0004] To achieve a wide range of adjustment for the handrails, multiple individual adjustment mechanisms (such as lifting, sliding, and rotating) are mechanically stacked and combined, inevitably leading to a surge in the number of parts. These parts typically include numerous metal bushings, plastic clips, micro gears, springs, pins, and complex locking bolts. The increased number of parts directly results in complex assembly, high costs, and the need for specialized tools and skilled workers for assembly. The failure rate also increases; failure at any connection point or locking mechanism can cause the entire handrail to lose its function or produce abnormal noises and wobbling. The structure is redundant and bulky, which is not conducive to lightweight design and transportation. The multi-level stacked structure inevitably introduces more gaps and tolerance accumulation. Each hinge point and each section of the slide rail has a small clearance. When multiple such nodes are connected in series, they will have a significant amplification effect at the end of the handrail, resulting in insufficient overall support rigidity and easy wobbling and loosening during use. This instability is particularly noticeable when users frequently adjust or apply lateral pressure (such as when standing up for leverage), seriously affecting the quality and safety of use. The long-term durability of such complex structures faces severe challenges; critical kinematic pairs and locking mechanisms are highly susceptible to wear, fatigue, or plastic deformation during long-term, high-frequency adjustment cycles. For example, springs may fail, leading to insufficient locking force; plastic teeth may wear down, causing positioning failure, ultimately resulting in loose adjustment functions or even complete failure. This not only reduces product lifespan but also poses safety hazards.

[0005] Taking the Chinese patent "A Comfortable Adjustable Ergonomic Office Chair" with application number 202110924300.9 as an example, its armrest adjustment scheme is a typical manifestation of this type of problem. In order to pursue a wide range and multi-angle support, this design also adopts the idea of ​​multi-layer mechanical structure superposition. Analyzing its structure, it can be seen that in order to achieve a specific function, its armrest connection mechanism must contain multiple pivots and connecting rods, and corresponding locking points need to be set. Although this design achieves flexible adjustment on the drawings, in the actual product, each additional joint is a potential loosening point and a source of wear. After long-term use, users may find that the armrest cannot be stably locked at a certain angle, or that it will wobble when a little force is applied. This is a specific manifestation of the inherent defects of multi-level superposition structures, confirming the dilemma of "the more functions, the more fragile the structure" that is common in the prior art. Summary of the Invention

[0006] To improve the range of adjustable support positions, some ergonomic office chair armrests incorporate numerous adjustment mechanisms. However, these overlapping structures, with their many components, are prone to damage and instability. To address these issues, this invention provides the following technical solution: A highly stable ergonomic office chair includes an ergonomic chair body. Each ergonomic chair body has an armrest on each side. Each armrest includes a support plate and a multi-angle suspension column. One end of the multi-angle suspension column is attached to the ergonomic chair body, and the other end is attached to the support plate, which supports the arms. The multi-angle suspension column includes an elastic rubber sleeve and a suspension support column. The elastic rubber sleeve is fitted onto the suspension support column, and one end of the suspension support column is attached to the ergonomic chair body, while the other end is attached to the support plate. The suspension support column includes a support top cover, a telescopic column, and a support base. The support top cover is attached to the bottom of the support plate, and the support base is attached to... On the main body of the ergonomic office chair, a telescopic column is assembled between the support top cover and the support base, with the telescopic column and both the support top cover and the support base connected by ball joints. Limiting structures are provided on both the support top cover and the support base. The suspended support column, connected to the support base by the telescopic column, can rotate at any angle. The support plate for the armrest can be adjusted to any angle by connecting to the support top cover by the telescopic column. Finally, by combining the telescopic column to adjust the position of the support plate, the armrest can be suspended at any position in multiple dimensions (see figure for details). This ensures that the armrest can be supported at any angle and position with the simplest structure, improving stability during use.

[0007] Furthermore, the telescopic column includes a telescopic column body, a first support ball fixed at one end of the telescopic column body, and a second support ball fixed at the other end of the telescopic column body. Both the first and second support balls are made of magnetic metal material. The telescopic column body, the first support ball, and the second support ball are arranged in a straight line.

[0008] Furthermore, the telescopic column body and the second support ball are connected by a connecting column, and the telescopic column body, the second support ball and the connecting column are integrally fixedly connected.

[0009] Furthermore, the main body of the telescopic column is an electric telescopic rod, a hydraulic telescopic rod, or a pneumatic telescopic rod.

[0010] Furthermore, the limiting structure on the supporting top cover is a first magnetic limiting structure, which becomes magnetic after being energized, and is used to limit the ball joint between the telescopic column and the supporting top cover.

[0011] Furthermore, the limiting structure on the support base is a second magnetic limiting structure, which becomes magnetic after being energized, and is used to limit the ball joint between the telescopic column and the support base.

[0012] Furthermore, the first magnetic limiting structure and the second magnetic limiting structure adopt the same structure. The first magnetic limiting structure includes a limiting post, on which an electromagnetic coil is laid. The first magnetic limiting structure and the second magnetic limiting structure are connected by a cable. The cable is used to switch power on and off the first magnetic limiting structure and the second magnetic limiting structure.

[0013] Furthermore, the supporting top cover includes a top cover platform, on which a first spherical cavity is formed. The interior of the first spherical cavity is smooth and is used to support the base and the telescopic column ball hinge. The side of the top cover platform away from the first spherical cavity is connected to a connecting plate, which is used to fix it to the supporting plate.

[0014] Furthermore, the support base includes a base platform, on which a second spherical cavity is formed. The interior of the second spherical cavity is smooth, and the second spherical cavity is used to support the hinge connection between the base and the telescopic column.

[0015] Furthermore, the support base also includes a mounting column, which is integrally fixed to the base platform. A mounting plate is fixed to the end of the mounting column away from the base platform, and the mounting plate is used to install on the main body of the ergonomic office chair.

[0016] Therefore, during use, the arm directly acts on the support plate, releasing the first magnetic limiting structure from restricting the first support ball and the first spherical cavity. The telescopic column and the support top cover are hinged through the first support ball and the first spherical cavity, allowing rotation at any angle. After adjusting the outer wall, the first magnetic limiting structure re-restricts the first support ball and the first spherical cavity. The second magnetic limiting structure then releases the second support ball and the second spherical cavity, allowing the telescopic column and the support base to be hinged through the second support ball and the second spherical cavity, enabling rotation adjustment at any angle. Finally, the telescopic column, combined with an electric, hydraulic, or pneumatic telescopic rod, adjusts the position of the support plate, enabling the arm to be suspended at any position in multiple dimensions. This ensures that the arm can be supported at any angle and position with the simplest structure, improving the stability of use.

[0017] Upper angle adjustment: When the user applies force to the support plate with their arm, the magnetic limiting structure can be released from adsorption and locking of the first support ball and the first spherical cavity. At this time, the upper end of the telescopic column connecting the support plate can swing relative to the support top cover at any angle through the ball hinge point. After adjustment, the magnetic force is automatically reset, achieving a silent and secure lock. Lower layer angle adjustment: By releasing the second magnetic limiting structure from restricting the second support ball and the second spherical cavity, the lower end of the telescopic column can be rotated at any angle relative to the support base in a second degree of freedom; this provides a basis for the composite adjustment of the tilt angle and direction of the upper support plate.

[0018] Column expansion and contraction: The expansion column itself, which serves as the central axis, can expand and contract linearly based on the universal degrees of freedom provided by the upper and lower ball joints; this step ultimately determines the absolute spatial position of the supporting plane.

[0019] The rotation of the upper ball joint, the rotation of the lower ball joint, and the extension and retraction of the column are not isolated, but constitute a series of "double ball joint-telescopic linkage" spatial motion models. The joint state of the two ball joints is controlled by the rapid switching of magnetic force, and combined with the change in the length of the telescopic column, the support plate at the end is finally driven to achieve stepless adjustment and stable suspension at any position and angle within the spherical workspace with the support base as the origin.

[0020] Compared with existing technologies, the high-stability ergonomic office chair of this invention can achieve the following: 1. The suspension support column can rotate at any angle through a ball joint between the telescopic column and the support base; the support plate used for supporting the arm can be adjusted at any angle through a ball joint between the telescopic column and the support top cover; finally, the telescopic column is combined to adjust the position of the support plate, realizing the suspension of the support arm at any position in multiple dimensions, ensuring that the arm can be supported at any angle and position with the simplest structure, thus improving the stability of use. 2. Traditional multi-degree-of-freedom adjustment relies on the series connection of multiple independent slide rails, rotating shafts, and locking bolts, and the accumulation of tolerances leads to end-effector wobbling. The main moving parts of this invention are integrated into two precision ball joints and a linear actuator, resulting in an extremely short kinematic chain. When the first magnetic limiting structure and the second magnetic limiting structure are attracted and locked, the first support ball and the first spherical cavity, and the second support ball and the second spherical cavity, actually form two huge, full-circumference contact points, which together with the telescopic column constitute an exceptionally stable triangular force transmission path. The arm pressure is directly transmitted to the base, avoiding the bending moment and gap wobbling in traditional layered mechanisms, thus providing omnidirectional adjustment while achieving ultra-high static and dynamic rigidity comparable to fixed handrails. 3. Traditional mechanical locking relies on tooth meshing or bolt friction. Frequent adjustments cause wear, leading to a decrease in locking force and loosening. This invention uses a magnetic limiting structure as the locking method. Magnetic adsorption is a surface contact locking method without relative mechanical movement. This brings three major advantages: zero-wear locking, self-adaptive fit, and elegant operation. Zero-wear locking means there is no physical scratching during locking and unlocking. The lifespan of the mechanism is almost synchronized with the decay of the magnet's magnetic properties, far exceeding that of mechanical structures. Self-adaptive fit means that the magnetic force enables the ball and the ball cavity to automatically find the maximum contact area and adhere and lock, improving the reliability of locking. Elegant operation means that the user only needs to overcome the magnetic attraction to start adjusting. During the adjustment process, the ball joint rotates smoothly, and automatically locks with a "click" when in place, providing a smooth and sophisticated operation. 4. The electric, hydraulic, or pneumatic telescopic rods themselves possess lockable rigidity, and the two ball joints are also magnetically locked, forming a multi-layered interlocking safety system. During normal use, the three work together to ensure stability. When encountering abnormally large impact forces (such as when a user suddenly leans sideways to stand up by the handrail), the magnetic limiting structures of the first and second magnetic limiting structures can preferentially and controllably disengage instantaneously, avoiding rigid damage to the mechanism. After the impact, it can easily return to its original position. This design gives the handrail yielding and buffering capabilities under extreme conditions, protecting the core structure and improving the overall product's safety redundancy. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of a highly stable ergonomic office chair according to one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a multi-angle hovering column in one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the hovering support column in one embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a telescopic column in one embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the support base in one embodiment of the present invention; Figure 6 This is a schematic diagram of the supporting top cover in one embodiment of the present invention; Figure 7 for Figure 3 A demonstration diagram showing the suspension of the central suspension support column at any position.

[0022] In the picture: Ergonomic office chair body 1, armrests 2, support plate 3, multi-angle suspension column 4; Elastic rubber sleeve 41, hovering support column 42, support top cover 43, telescopic column 44, cable 45, support base 46, connecting plate 431, first magnetic limiting structure 432, top cover platform 433, first spherical cavity 434, first support ball 441, telescopic column body 442, connecting column 443, second support ball 444, second magnetic limiting structure 461, second spherical cavity 462, base platform 463, mounting column 464, mounting plate 465. Detailed Implementation

[0023] The technical solution of the present invention will be further described in detail below with reference to specific embodiments. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more.

[0024] In one embodiment of the present invention, please refer to Figures 1-3A highly stable ergonomic office chair includes an ergonomic office chair body 1. The ergonomic office chair body 1 is equipped with an armrest 2 on each of its two sides. The armrest 2 includes a support plate 3 and a multi-angle suspension column 4. One end of the multi-angle suspension column 4 is mounted on the ergonomic office chair body 1, and the other end is mounted on the support plate 3. The support plate 3 is used to support the arms. The following needs to be specifically explained regarding the main body 1 of the ergonomic office chair: it includes a headrest, backrest, seat, and support legs, etc., all of which are existing technologies; those skilled in the art can easily learn about the specific structure of the main body 1 of the ergonomic office chair through existing literature and products on the market, and it is not what this application seeks to protect, so it will not be described in detail here. The multi-angle suspension column 4 includes an elastic rubber sleeve 41 and a suspension support column 42. The elastic rubber sleeve 41 is fitted onto the suspension support column 42. One end of the suspension support column 42 is mounted on the ergonomic office chair body 1, and the other end is mounted on the support plate 3. The elastic rubber sleeve 41 is existing technology, and its specific material is not limited. Of course, it can also be other elastic materials, as long as it can follow the deformation of the multi-angle suspension column 4. At the same time, it can be purchased directly on the market, and there are relevant descriptions in relevant journal literature. It is not what this invention is trying to protect, so it will not be described in detail here. The hovering support column 42 includes a support top cover 43, a telescopic column 44, and a support base 46. The support top cover 43 is mounted on the bottom of the support plate 3, and the support base 46 is mounted on the ergonomic office chair body 1. The telescopic column 44 is mounted between the support top cover 43 and the support base 46, and the telescopic column 44 is ball-jointed with both the support top cover 43 and the support base 46. Limiting structures are provided on both the support top cover 43 and the support base 46. Therefore, to address the issue that some ergonomic office chair armrests incorporate numerous adjustment mechanisms to increase the range of adjustable support, these mechanisms, with their many components, are prone to damage and instability. This application addresses this problem by: The hovering support column 42 is connected to the support base 46 via a ball joint of the telescopic column 44, allowing it to rotate at any angle. The support plate 3 for the support arm is connected to the support top cover 43 via the telescopic column 44, allowing it to rotate and be adjusted at any angle. Finally, by combining the telescopic column 44 to extend and retract, the position of the support plate 3 can be adjusted, enabling the support arm to be hovered at any position in multiple dimensions (see details). Figure 7 This ensures that the handrail 2 can support the arm at any angle and position with the simplest structure, thus improving the stability of use.

[0025] In another embodiment of the present invention, please refer to Figure 3 and Figure 4The telescopic column 44 includes a telescopic column body 442, with a first support ball 441 fixed at one end of the telescopic column body 442 and a second support ball 444 fixed at the other end of the telescopic column body 442. The first support ball 441 and the second support ball 444 are both made of magnetic metal material. The telescopic column body 442 and the first support ball 441 and the second support ball 444 are arranged in a straight line.

[0026] The magnetic metal materials of the first support ball 441 and the second support ball 444 are existing technologies, and there is no limitation on the specific materials used. Of course, other magnetic materials can also be used, as long as they can achieve magnetic adsorption. At the same time, they can be purchased directly on the market, and there are relevant descriptions in relevant journal articles. They are not the subject of this invention and will not be described in detail here.

[0027] For further details, please see Figure 4 The telescopic column body 442 and the second support ball 444 are connected by a connecting column 443, and the telescopic column body 442, the second support ball 444 and the connecting column 443 are integrally fixedly connected.

[0028] Please see Figure 4 The telescopic column body 442 is an electric telescopic rod, a hydraulic telescopic rod, or a pneumatic telescopic rod.

[0029] The telescopic column body 442 is existing technology, and its specific structure is not limited. Of course, it can also be other telescopic structures, as long as it can achieve telescopic movement. At the same time, it can be purchased directly on the market, and there are relevant descriptions in relevant journal articles. It is not what this invention is trying to protect, so it will not be described in detail here.

[0030] In another embodiment of the present invention, please refer to Figure 3 and Figure 6 The limiting structure on the supporting top cover 43 is a first magnetic limiting structure 432, which becomes magnetic after being energized and is used to limit the ball joint between the telescopic column 44 and the supporting top cover 43.

[0031] For further details, please see Figure 3 and Figure 5 The limiting structure on the support base 46 is a second magnetic limiting structure 461. When the second magnetic limiting structure 461 is energized, it becomes magnetic and is used to limit the ball joint between the telescopic column 44 and the support base 46.

[0032] Please see Figure 5 and Figure 6The first magnetic limiting structure 432 and the second magnetic limiting structure 461 adopt the same structure. The first magnetic limiting structure 432 includes a limiting post, on which an electromagnetic coil is laid. The first magnetic limiting structure 432 and the second magnetic limiting structure 461 are connected by a cable 45. The cable 45 is used to turn the first magnetic limiting structure 432 and the second magnetic limiting structure 461 on and off.

[0033] Regarding electromagnetic coils, it is necessary to clarify that electromagnetic coils belong to existing technology; those skilled in the art can easily learn about the specific structure of electromagnetic coils through existing literature and products on the market, and they are not the subject of this application, so they will not be described in detail here.

[0034] In another embodiment of the present invention, please refer to Figure 3 and Figure 6 The supporting top cover 43 includes a top cover platform 433, on which a first spherical cavity 434 is formed. The interior of the first spherical cavity 434 is smooth. The first spherical cavity 434 is used to support the base 46 and the telescopic column 44 for ball hinge connection (specifically, the telescopic column body 442 is ball hinged inside the first spherical cavity 434 through the first support ball 441, and the telescopic column 44 and the supporting top cover 43 are ball hinged through the first support ball 441 and the first spherical cavity 434; and a first magnetic limiting structure 432 is installed on the top cover platform 433, and the limiting post of the first magnetic limiting structure 432 extends into the interior of the first spherical cavity 434); the side of the top cover platform 433 away from the first spherical cavity 434 is connected to a connecting plate 431, and the connecting plate 431 is used to fix it to the supporting plate 3.

[0035] In another embodiment of the present invention, please refer to Figure 3 and Figure 5 The supporting base 46 includes a base platform 463, on which a second spherical cavity 462 is formed. The interior of the second spherical cavity 462 is smooth. The second spherical cavity 462 is used to support the base 46 and the telescopic column 44 for spherical hinge connection (specifically, the telescopic column body 442 is spherically hinged to the second spherical cavity 462 through the second supporting ball 444, and the telescopic column 44 and the supporting base 46 are spherically hinged through the second supporting ball 444 and the second spherical cavity 462; and a second magnetic limiting structure 461 is installed on the base platform 463, and the limiting post of the second magnetic limiting structure 461 extends into the interior of the second spherical cavity 462).

[0036] For further details, please see Figure 5 The support base 46 also includes a mounting column 464, which is integrally fixed on the base platform 463. A mounting plate 465 is fixed to the end of the mounting column 464 away from the base platform 463. The mounting plate 465 is used to install on the ergonomic office chair body 1.

[0037] Therefore, during use, the arm directly acts on the support plate 3, releasing the first magnetic limiting structure 432 from limiting the first support ball 441 and the first spherical cavity 434. The telescopic column 44 and the support top cover 43 are connected by the first support ball 441 and the first spherical cavity 434, allowing rotation at any angle. After adjusting the outer wall, the first magnetic limiting structure 432 is re-limited to the first support ball 441 and the first spherical cavity 434. The second magnetic limiting structure 461 is released from limiting the second support ball 444 and the second spherical cavity 462. The telescopic column 44 and the support base 46 are connected by the second support ball 444 and the second spherical cavity 462, allowing rotation adjustment at any angle. Finally, the telescopic column 44, which is combined into an electric telescopic rod, a hydraulic telescopic rod, or a pneumatic telescopic rod, adjusts the position of the support plate 3, enabling the arm to be suspended at any position in multiple dimensions. This ensures that the armrest 2 can be supported at any angle and position with the simplest structure, improving the stability of use.

[0038] In summary: Upper angle adjustment: When the user applies force to the support plate 3 with their arm, the magnetic limiting structure 432 can release the adsorption and locking of the first support ball 441 and the first spherical cavity 434. At this time, the upper end of the telescopic column 44 connecting the support plate 3 can swing relative to the support top cover 43 at any angle through the ball hinge point. After adjustment, the magnetic force is automatically reset, achieving a silent and secure locking without jamming. Lower layer angle adjustment: By releasing the second magnetic limiting structure 461 from limiting the second support ball 444 and the second spherical cavity 462, the lower end of the telescopic column 44 can be rotated at any angle relative to the support base 46 in the second degree of freedom; this provides a basis for the composite adjustment of the tilt angle and direction of the upper support plate 3.

[0039] Column telescopic: The telescopic column 44, which serves as the central axis, can extend and retract linearly based on the universal degrees of freedom provided by the upper and lower ball joints; this step ultimately determines the absolute spatial position of the supporting plane.

[0040] The three links of upper ball joint rotation, lower ball joint rotation, and column extension are not isolated, but constitute a series of "double ball joint - telescopic linkage" spatial motion model. The joint state of the two ball joints is controlled by the rapid switching of magnetic force. Combined with the length change of the telescopic column 44, the support plate 3 at the end is finally driven to achieve stepless adjustment and stable suspension at any position and angle in the spherical workspace with the support base 46 as the origin.

[0041] Traditional multi-degree-of-freedom adjustment relies on the series connection of multiple independent slide rails, rotating shafts, and locking bolts, and the accumulation of tolerances leads to end-effector wobbling. The main moving parts of this invention are integrated into two precision ball joints and a linear actuator, resulting in an extremely short kinematic chain. When the first magnetic limiting structure 432 and the second magnetic limiting structure 461 are attracted and locked, the first support ball 441 and the first spherical cavity 434, and the second support ball 444 and the second spherical cavity 462 actually form two huge, full-circumference contact fixed points, which together with the telescopic column 44 form an exceptionally stable triangular force transmission path. The arm pressure is directly transmitted to the base, avoiding the bending moment and gap wobbling in traditional layered mechanisms, thus providing omnidirectional adjustment while achieving ultra-high static and dynamic rigidity comparable to fixed handrails.

[0042] Traditional mechanical locking relies on tooth meshing or bolt friction, which can lead to wear and tear with frequent adjustments, resulting in weakened locking force and loosening. This invention employs a magnetic limiting structure as the locking method; magnetic adsorption is a surface contact locking mechanism without relative mechanical movement. This brings three major advantages: zero-wear locking, self-adaptive fit, and elegant operation. Zero-wear locking means there is no physical scraping during locking and unlocking, and the lifespan of the mechanism is almost synchronized with the decay of the magnet's magnetic properties, far exceeding that of mechanical structures. Self-adaptive fit means that the magnetic force enables the ball and the ball cavity to automatically find the maximum contact area and adhere and lock, improving the reliability of the lock. Elegant operation means that the user only needs to overcome the magnetic attraction to begin adjustment; the ball joint rotates smoothly during adjustment, and automatically locks with a "click" when in place, providing a smooth and sophisticated experience.

[0043] Electric, hydraulic, or pneumatic telescopic rods possess lockable rigidity, and the two ball joints are also magnetically locked, forming a multi-layered interlocking safety system. During normal use, the three work together to ensure stability. When encountering abnormally large impact forces (such as a user suddenly leaning to the side to stand up), the magnetic limiting structures of the first magnetic limiting structure 432 and the second magnetic limiting structure 461 can preferentially and controllably disengage instantaneously, avoiding rigid damage to the mechanism. After the impact, it can easily return to its original position. This design gives the handrail 2 yielding and buffering capabilities under extreme conditions, protecting the core structure and improving the overall product's safety redundancy.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A highly stable ergonomic office chair, comprising an ergonomic office chair body (1), wherein an armrest (2) is respectively mounted on both sides of the ergonomic office chair body (1), the armrest (2) comprising a support plate (3) and a multi-angle suspension column (4); one end of the multi-angle suspension column (4) is mounted on the ergonomic office chair body (1), and the other end is mounted on the support plate (3), the support plate (3) being used to support the arm; characterized in that, The multi-angle suspension column (4) includes an elastic rubber sleeve (41) and a suspension support column (42). The elastic rubber sleeve (41) is fitted onto the suspension support column (42). One end of the suspension support column (42) is mounted on the ergonomic office chair body (1), and the other end is mounted on the support plate (3). The hovering support column (42) includes a support top cover (43), a telescopic column (44), and a support base (46). The support top cover (43) is mounted on the bottom of the support plate (3), and the support base (46) is mounted on the ergonomic office chair body (1). The telescopic column (44) is mounted between the support top cover (43) and the support base (46), and the telescopic column (44) is ball-jointed with both the support top cover (43) and the support base (46). Limiting structures are provided on both the support top cover (43) and the support base (46).

2. The highly stable ergonomic office chair according to claim 1, characterized in that, The telescopic column (44) includes a telescopic column body (442), with a first support ball (441) fixed at one end of the telescopic column body (442) and a second support ball (444) fixed at the other end. The first support ball (441) and the second support ball (444) are both made of magnetic metal material. The telescopic column body (442), the first support ball (441), and the second support ball (444) are arranged in a straight line.

3. The highly stable ergonomic office chair according to claim 2, characterized in that, The telescopic column body (442) and the second support ball (444) are connected by a connecting column (443), and the telescopic column body (442), the second support ball (444) and the connecting column (443) are integrally fixedly connected.

4. The highly stable ergonomic office chair according to claim 3, characterized in that, The telescopic column body (442) is an electric telescopic rod, a hydraulic telescopic rod, or a pneumatic telescopic rod.

5. The highly stable ergonomic office chair according to claim 1, characterized in that, The limiting structure on the supporting top cover (43) is a first magnetic limiting structure (432), which becomes magnetic after being energized and is used to limit the ball joint between the telescopic column (44) and the supporting top cover (43).

6. The highly stable ergonomic office chair according to claim 5, characterized in that, The limiting structure on the support base (46) is a second magnetic limiting structure (461), which becomes magnetic after being energized and is used to limit the ball joint between the telescopic column (44) and the support base (46).

7. The highly stable ergonomic office chair according to claim 6, characterized in that, The first magnetic limiting structure (432) and the second magnetic limiting structure (461) adopt the same structure. The first magnetic limiting structure (432) includes a limiting post, on which an electromagnetic coil is laid. The first magnetic limiting structure (432) and the second magnetic limiting structure (461) are connected by a cable (45). The cable (45) is used to turn the first magnetic limiting structure (432) and the second magnetic limiting structure (461) on and off.

8. The highly stable ergonomic office chair according to claim 1, characterized in that, The supporting top cover (43) includes a top cover platform (433), on which a first spherical cavity (434) is provided. The interior of the first spherical cavity (434) is smooth. The first spherical cavity (434) is used to support the base (46) and the telescopic column (44) in a ball joint. The side of the top cover platform (433) away from the first spherical cavity (434) is connected to a connecting plate (431). The connecting plate (431) is used to fix it to the supporting plate (3).

9. The highly stable ergonomic office chair according to claim 1, characterized in that, The support base (46) includes a base platform (463), on which a second spherical cavity (462) is provided. The interior of the second spherical cavity (462) is smooth. The second spherical cavity (462) is used to support the spherical hinge of the base (46) and the telescopic column (44).

10. The highly stable ergonomic office chair according to claim 9, characterized in that, The support base (46) also includes a mounting column (464), which is integrally fixed on the base platform (463). The end of the mounting column (464) away from the base platform (463) is fixed with a mounting plate (465), which is used to install on the ergonomic office chair body (1).

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