Coaxial rotating seat

Abstract

The utility model discloses a coaxial rotating seat which comprises a bottom support, a cushion and a back supporting assembly, and connecting arms extending upwards are arranged on the two sides of the bottom support; the cushion is arranged between the two connecting arms; the back supporting assembly comprises a connecting frame, a backrest and a control mechanism, the left side and the right side of the connecting frame are rotationally connected with the two connecting arms respectively, the backrest is connected to the connecting frame, and the control mechanism is used for connecting the front end of the cushion and the lower end of the connecting frame, so that rotation of the connecting frame can be controlled; the connecting positions of the connecting frame and the two connecting arms are first connecting points, the connecting line between the two first connecting points is a first axis, the first axis is located above the rear portion of the cushion, and the connecting frame and the backrest can rotate around the first axis. According to the coaxial rotating seat disclosed by the embodiment of the utility model, the rotating axis of the backrest component is arranged above the rear part of the cushion and is kept coaxial with the rotating shaft of the waist of the human body, so that the problem that the backrest and the human body do not move synchronously when the traditional seat is tilted is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, and in particular to a coaxial rotating seat. Background Technology

[0002] In the field of seats and ergonomic chairs, traditional chassis designs integrate the connection of the gas spring, the seat, and the backrest tilt function. However, since the backrest is connected to the chassis and the chassis is under the seat, the backrest and the human back are often out of sync when tilting, which can easily cause discomfort such as "back rubbing" or "back of the head" and affect the user experience. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a coaxial rotating seat, which effectively solves the technical problem of the backrest and human body movement being out of sync when the seat is tilted by setting the rotation axis of the backrest assembly above the rear of the seat cushion and keeping it coaxial with the rotation axis of the human waist.

[0004] The coaxial rotating seat provided according to an embodiment of the present invention includes:

[0005] The bottom support has upward-extending connecting arms on both the left and right sides.

[0006] A seat cushion, connected to the bottom support and located between the two connecting arms;

[0007] The back support assembly includes a connecting frame, a backrest, and a control mechanism. The connecting frame is disposed between two connecting arms and is rotatably connected to the two connecting arms on its left and right sides, respectively. The backrest is connected to the connecting frame and located at the rear of the seat cushion. One end of the control mechanism is connected to the front end of the seat cushion, and the other end is connected to the lower end of the connecting frame. The control mechanism is configured to control the rotation of the connecting frame.

[0008] The connection point between the connecting frame and the two connecting arms is the first connection point, and the line connecting the two first connection points is the first axis. The first axis is located above the rear of the seat cushion, and the connecting frame and the backrest can rotate around the first axis.

[0009] The coaxial rotating seat has at least the following beneficial effects: the rotating axis of the backrest assembly is arranged above the rear part of the cushion, and is coaxial with the rotating shaft of the human waist, thereby effectively solving the technical problem that the backrest is not synchronized with the human body movement when the conventional seat is tilted; when the user leans back, the backrest assembly rotates around the first axis, and the physiological curvature of the user's lumbar spine naturally fits the curved surface of the backrest, thereby forming a synchronous rotating movement mode, and the relative sliding friction between the back and the chair back is significantly reduced; the structure design makes the backrest fulcrum height correspond to the positions of the third and fourth lumbar vertebrae in the sitting state of the human body, thereby conforming to the ergonomic principle, maintaining the continuous support of the waist and back when the tilting function is realized, and completely eliminating the "back rubbing" phenomenon; in addition, the bottom support is used to replace the conventional bottom disc structure to support the cushion and the back support assembly, thereby realizing the bottom disc-free of the seat, saving the production cost, and the layout mode of arranging the rotating axis above the supporting surface of the cushion effectively shortens the backrest rotating radius compared with the conventional lower-mounted bottom disc structure, thereby realizing a larger effective tilt angle in the limited space, and maintaining that the front edge of the cushion does not be displaced significantly.

[0010] The coaxial rotating seat has at least the following beneficial effects: the rotating axis of the backrest assembly is arranged above the rear part of the cushion, and is coaxial with the rotating shaft of the human waist, thereby effectively solving the technical problem that the backrest is not synchronized with the human body movement when the conventional seat is tilted; when the user leans back, the backrest assembly rotates around the first axis, and the physiological curvature of the user's lumbar spine naturally fits the curved surface of the backrest, thereby forming a synchronous rotating movement mode, and the relative sliding friction between the back and the chair back is significantly reduced; the structure design makes the backrest fulcrum height correspond to the positions of the third and fourth lumbar vertebrae in the sitting state of the human body, thereby conforming to the ergonomic principle, maintaining the continuous support of the waist and back when the tilting function is realized, and completely eliminating the "back rubbing" phenomenon; in addition, the bottom support is used to replace the conventional bottom disc structure to support the cushion and the back support assembly, thereby realizing the bottom disc-free of the seat, saving the production cost, and the layout mode of arranging the rotating axis above the supporting surface of the cushion effectively shortens the backrest rotating radius compared with the conventional lower-mounted bottom disc structure, thereby realizing a larger effective tilt angle in the limited space, and maintaining that the front edge of the cushion does not be displaced significantly.

[0011] The coaxial rotating seat has at least the following beneficial effects: the rotating axis of the backrest assembly is arranged above the rear part of the cushion, and is coaxial with the rotating shaft of the human waist, thereby effectively solving the technical problem that the backrest is not synchronized with the human body movement when the conventional seat is tilted; when the user leans back, the backrest assembly rotates around the first axis, and the physiological curvature of the user's lumbar spine naturally fits the curved surface of the backrest, thereby forming a synchronous rotating movement mode, and the relative sliding friction between the back and the chair back is significantly reduced; the structure design makes the backrest fulcrum height correspond to the positions of the third and fourth lumbar vertebrae in the sitting state of the human body, thereby conforming to the ergonomic principle, maintaining the continuous support of the waist and back when the tilting function is realized, and completely eliminating the "back rubbing" phenomenon; in addition, the bottom support is used to replace the conventional bottom disc structure to support the cushion and the back support assembly, thereby realizing the bottom disc-free of the seat, saving the production cost, and the layout mode of arranging the rotating axis above the supporting surface of the cushion effectively shortens the backrest rotating radius compared with the conventional lower-mounted bottom disc structure, thereby realizing a larger effective tilt angle in the limited space, and maintaining that the front edge of the cushion does not be displaced significantly.

[0012] The coaxial rotating seat has at least the following beneficial effects: the rotating axis of the backrest assembly is arranged above the rear part of the cushion, and is coaxial with the rotating shaft of the human waist, thereby effectively solving the technical problem that the backrest is not synchronized with the human body movement when the conventional seat is tilted; when the user leans back, the backrest assembly rotates around the first axis, and the physiological curvature of the user's lumbar spine naturally fits the curved surface of the backrest, thereby forming a synchronous rotating movement mode, and the relative sliding friction between the back and the chair back is significantly reduced; the structure design makes the backrest fulcrum height correspond to the positions of the third and fourth lumbar vertebrae in the sitting state of the human body, thereby conforming to the ergonomic principle, maintaining the continuous support of the waist and back when the tilting function is realized, and completely eliminating the "back rubbing" phenomenon; in addition, the bottom support is used to replace the conventional bottom disc structure to support the cushion and the back support assembly, thereby realizing the bottom disc-free of the seat, saving the production cost, and the layout mode of arranging the rotating axis above the supporting surface of the cushion effectively shortens the backrest rotating radius compared with the conventional lower-mounted bottom disc structure, thereby realizing a larger effective tilt angle in the limited space, and maintaining that the front edge of the cushion does not be displaced significantly.

[0013] The coaxial rotating seat has at least the following beneficial effects: the rotating axis of the backrest assembly is arranged above the rear part of the cushion, and is coaxial with the rotating shaft of the human waist, thereby effectively solving the technical problem that the backrest is not synchronized with the human body movement when the conventional seat is tilted; when the user leans back, the backrest assembly rotates around the first axis, and the physiological curvature of the user's lumbar spine naturally fits the curved surface of the backrest, thereby forming a synchronous rotating movement mode, and the relative sliding friction between the back and the chair back is significantly reduced; the structure design makes the backrest fulcrum height correspond to the positions of the third and fourth lumbar vertebrae in the sitting state of the human body, thereby conforming to the ergonomic principle, maintaining the continuous support of the waist and back when the tilting function is realized, and completely eliminating the "back rubbing" phenomenon; in addition, the bottom support is used to replace the conventional bottom disc structure to support the cushion and the back support assembly, thereby realizing the bottom disc-free of the seat, saving the production cost, and the layout mode of arranging the rotating axis above the supporting surface of the cushion effectively shortens the backrest rotating radius compared with the conventional lower-mounted bottom disc structure, thereby realizing a larger effective tilt angle in the limited space, and maintaining that the front edge of the cushion does not be displaced significantly.

[0014] The coaxial rotating seat has at least the following beneficial effects: the rotating axis of the backrest assembly is arranged above the rear part of the cushion, and is coaxial with the rotating shaft of the human waist, thereby effectively solving the technical problem that the backrest is not synchronized with the human body movement when the conventional seat is tilted; when the user leans back, the backrest assembly rotates around the first axis, and the physiological curvature of the user's lumbar spine naturally fits the curved surface of the backrest, thereby forming a synchronous rotating movement mode, and the relative sliding friction between the back and the chair back is significantly reduced; the structure design makes the backrest fulcrum height correspond to the positions of the third and fourth lumbar vertebrae in the sitting state of the human body, thereby conforming to the ergonomic principle, maintaining the continuous support of the waist and back when the tilting function is realized, and completely eliminating the "back rubbing" phenomenon; in addition, the bottom support is used to replace the conventional bottom disc structure to support the cushion and the back support assembly, thereby realizing the bottom disc-free of the seat, saving the production cost, and the layout mode of arranging the rotating axis above the supporting surface of the cushion effectively shortens the backrest rotating radius compared with the conventional lower-mounted bottom disc structure, thereby realizing a larger effective tilt angle in the limited space, and maintaining that the front edge of the cushion does not be displaced significantly.

[0015] According to the coaxial rotating seat provided in the embodiment of this utility model, the second rotating seat has screw holes on both sides, and fasteners are inserted into the screw holes to fix the second rotating seat to the lower side of the seat cushion.

[0016] According to the coaxial rotating seat provided in this embodiment of the utility model, the rear side of the connecting frame has a crossbar, and the lower end of the backrest is connected to the crossbar.

[0017] According to the coaxial rotating seat provided in the embodiment of this utility model, the lower end of the connecting frame has a hinge rod extending downward and toward the gas spring, and the end of the gas spring is hinged to the middle of the hinge rod.

[0018] According to the coaxial rotating seat provided in the embodiment of this utility model, the upper side of the bottom bracket is provided with a support plate, and the bottom of the seat cushion is fixed to the support plate by fasteners.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is an overall schematic diagram of the coaxial rotating seat according to an embodiment of the present invention;

[0022] Figure 2 This is an exploded view of the bottom bracket and back support assembly according to an embodiment of the present invention.

[0023] Figure 3 This is an exploded view of the seat cushion and back support assembly according to an embodiment of the present invention.

[0024] The attached icons are numbered as follows:

[0025] Bottom bracket 100; connecting arm 110; first connection point 111; support plate 120;

[0026] Seat cushion 200;

[0027] Back support assembly 300; connecting frame 310; crossbar 311; hinge rod 312; backrest 320; control mechanism 330; gas spring 331; paddle 332; control line 333; handle 334; spring 335; first rotating seat 336; second rotating seat 337. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, left, right, etc., indicating the directional or positional relationship, are based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] The present invention provides a coaxial rotating seat. The specific structure and function of the coaxial rotating seat provided by the present invention will be further described below with reference to the text and the accompanying drawings.

[0033] Reference Figures 1 to 3The coaxial rotating seat provided according to an embodiment of the present invention includes: a bottom support 100, a seat cushion 200, and a back support assembly 300. The bottom support 100 has upwardly extending connecting arms 110 on its left and right sides. The seat cushion 200 is connected to the bottom support 100 and located between the two connecting arms 110. The backrest assembly 320 includes a connecting frame 310, a backrest 320, and a control mechanism 330. The connecting frame 310 is located between the two connecting arms 110, and its left and right sides are rotatably connected to the two connecting arms 110 respectively. The backrest is connected to the connecting frame 310 and located behind the seat cushion 200. One end of the control mechanism 330 is connected to the front end of the bottom support 100, and the other end is connected to the lower end of the connecting frame 310. The connection point between the connecting frame 310 and the two connecting arms 110 is a first connection point 111, and the line connecting the two first connection points 111 is a first axis. The first axis is located above the rear of the seat cushion 200, ensuring that the connecting frame 310 and the backrest can rotate around the first axis. During use, when a user sits on the seat cushion 200, their lumbar rotation axis coincides with the first axis. When the user turns backward, their waist and backrest 320 can rotate synchronously, thus effectively avoiding the discomfort such as "back rubbing" or "back of the head" commonly found in traditional chairs.

[0034] The coaxial rotating seat provided according to the embodiments of this utility model has at least the following beneficial effects: By setting the rotation axis of the backrest 320 component above the rear of the seat cushion 200 and keeping it coaxial with the rotation axis of the human waist, the technical problem of the backrest 320 and human body movement being asynchronous when the traditional seat is tilted is effectively solved. When the user tilts back, the backrest 320 component rotates around the first axis, and the physiological curvature of the user's lumbar spine naturally conforms to the curved surface of the backrest 320, forming a synchronous rotation movement mode, which significantly reduces the relative sliding friction between the back and the chair back. This structural design makes the fulcrum height of the backrest 320 correspond to the position of the third and fourth lumbar vertebrae in the human sitting posture, which conforms to the ergonomic principle, maintains continuous support for the waist and back when realizing the tilting function, and completely eliminates the "back rubbing" phenomenon. Furthermore, by using the bottom bracket 100 to support the seat cushion 200 and the back support component 300 instead of the traditional chassis structure, the seat is chassisless, which helps to save production costs. Moreover, the layout of setting the rotation axis above the support surface of the seat cushion 200 effectively shortens the rotation radius of the backrest 320 compared to the traditional under-mounted chassis structure, achieving a larger effective tilt angle in a limited space, while keeping the front edge of the seat cushion 200 from displacing significantly.

[0035] Understandably, the connecting arms 110, symmetrically arranged on both sides of the bottom support 100, extend upwards to form a U-shaped support structure. The seat cushion 200 is fixed to the bottom support 100 by bolts and can be a composite structure of memory foam and breathable mesh fabric. In the backrest 320 assembly, the left and right side plates of the connecting frame 310 can be rotatably connected to the upper end of the connecting arms 110 via connecting shafts or studs. The first axis formed by the center line of the connecting shaft or stud is located 10-15cm above the rear edge of the seat cushion 200, corresponding to the position of the third lumbar vertebra when a person is sitting, so that the user's waist and the backrest 320 can rotate synchronously when rotating. The control component can be a telescopic rod, a multi-stage gas spring 335 mechanism, etc. When the user applies a backward leaning force, the backrest 320 assembly rotates synchronously around the first axis, and the control component provides progressive damping support to ensure that the lumbar support surface always conforms to the curve of the human body.

[0036] Reference Figure 2 and Figure 3 According to the coaxial rotating seat provided in this embodiment of the present invention, the control mechanism 330 includes a gas spring 331, a paddle 332, a control cable 333, and a handle 334. One end of the gas spring 331 is connected to the front end of the seat cushion 200 via a rotating connector, and the other end is connected to the lower end of the connecting frame 310 via a connector. The handle 334 is located on one side of the seat cushion 200 for easy user operation. The paddle 332 is located on one side of the gas spring 331 and is used to control the extension and retraction of the gas spring 331. The handle 334 and the paddle 332 are connected by the control cable 333. By operating the handle 334, the user can drive the paddle 332 to move via the control cable 333, thereby controlling the extension and retraction of the gas spring 331. This allows the user to easily adjust the tilt angle of the backrest 320 according to their own needs, further improving the comfort of the seat and the user experience.

[0037] In actual use, after the user sits on the seat cushion 200, by gripping the handle 334 and applying appropriate force, the control cable 333 will drive the paddle 332 to move, which in turn controls the extension and retraction of the gas spring 331. When the gas spring 331 extends or retracts, the connecting frame 310 rotates around the first axis, causing the backrest 320 to tilt. Because the extension and retraction of the gas spring 331 can be precisely controlled by the user, the tilt angle of the backrest 320 can be flexibly adjusted according to the user's posture and needs. This control method is simple and convenient to operate, and users can achieve their ideal seat posture without complicated adjustments. It is especially suitable for scenarios that require frequent adjustments to the seat posture, such as office environments or places where the chair is used for extended periods of time.

[0038] Reference Figures 1 to 3According to the coaxial rotating seat provided in this embodiment of the present invention, the control mechanism 330 further includes a spring 335, which is sleeved on the outer periphery of the gas spring 331, with both ends of the spring 335 abutting against both ends of the gas spring 331. When the gas spring 331 extends or retracts, the spring 335 can extend or retract accordingly following the movement of the gas spring 331, playing a role in buffering and auxiliary support.

[0039] In actual use, when the user operates the lever 332 via the handle 334 and control cable 333 to extend or retract the gas spring 331, the spring 335 will elastically deform along with the movement of the gas spring 331. This allows the spring 335 to provide a certain amount of elastic support during the extension and retraction of the gas spring 331, making the tilting motion of the backrest 320 more stable and preventing seat swaying or instability caused by rapid extension and retraction of the gas spring 331. At the same time, the elasticity of the spring 335 can also absorb and alleviate the force applied by the user during the tilting process to a certain extent, thereby improving the comfort of the seat.

[0040] Furthermore, the inclusion of spring 335 extends the lifespan of gas spring 331. Because spring 335 distributes some of the force, it reduces the direct impact on gas spring 331 during extension and retraction, thereby lowering wear and the risk of failure. This design is suitable for chairs requiring frequent adjustments to the backrest angle (320°), such as office chairs or gaming chairs, effectively improving the chair's durability and reliability.

[0041] Reference Figure 2 and Figure 3 According to the coaxial rotating seat provided in this embodiment of the present invention, a first rotating seat 336 is provided on the lower side of the front end of the seat cushion 200. The first rotating seat 336 includes two downwardly extending and spaced connecting plates. A rotating shaft is provided between the two connecting plates, and one end of the gas spring 331 is connected to the rotating shaft through a rotating connector, thereby realizing the rotatable connection between the gas spring 331 and the seat cushion 200. Through the structure of the first rotating seat 336 and the rotating shaft, it can be ensured that the gas spring 331 maintains a stable rotational state during the extension and retraction process, avoiding seat shaking or functional failure caused by loosening or instability of the connection parts. At the same time, the design of the first rotating seat 336 can also provide sufficient space so that the end of the gas spring 331 can rotate flexibly on the rotating shaft, thereby better adapting to the user's adjustment needs for the tilt angle of the backrest 320 in different postures.

[0042] In practical applications, when the user operates the lever 332 via the handle 334 and control cable 333 to extend or retract the gas spring 331, the end of the gas spring 331 will rotate around the pivot. Due to the cooperation between the first rotating seat 336 and the pivot, the rotation process is smoother and more stable, effectively reducing friction and wobbling caused by the extension and retraction of the gas spring 331, thereby improving the overall stability and comfort of the seat. Furthermore, this connection method facilitates installation and maintenance, increasing the seat's lifespan and reliability.

[0043] Reference Figure 2 and Figure 3 According to the coaxial rotating seat provided in this embodiment of the present invention, the control mechanism 330 further includes a second rotating seat 337, which is located on the right side of the seat cushion 200. A handle 334 is mounted on the second rotating seat 337 via a rotating connector, allowing the handle 334 to rotate outwards relative to the second rotating seat 337. This not only provides a stable support point for the handle 334 but also ensures the flexibility and stability of the handle 334 during operation. In actual use, the user can operate the control components by gripping the handle 334 and applying appropriate force. Because the handle 334 and the second rotating seat 337 are rotatably connected, the user can adjust the tilt angle of the backrest 320 without complex operations.

[0044] Understandably, the second rotating seat 337 can also effectively distribute the force on the handle 334 during operation, reduce the friction between the handle 334 and the control line 333, thereby extending the service life of the control components.

[0045] Reference Figure 2 and Figure 3 According to the coaxial rotating seat provided in this embodiment of the present invention, a paddle 332 is disposed on a first rotating seat 336 and has a pressing portion extending toward the gas spring 331. The pressing portion is used to directly contact the gas spring 331 and apply pressure, thereby controlling the extension and retraction of the gas spring 331. The paddle 332 is mounted on a rotating shaft via a rotating connector, allowing the paddle 332 to rotate around the rotating shaft. The user operates the handle 334, which drives the paddle 332 to rotate via the control line 333, thereby causing the pressing portion to abut against the gas spring 331, thus controlling the extension and retraction of the gas spring 331.

[0046] In actual use, when the user grips the handle 334 and applies appropriate force, the control line 333 transmits force to the lever 332, causing the lever 332 to rotate around the pivot. As the lever 332 rotates, the pressing part gradually approaches and eventually abuts against the gas spring 331. By applying pressure to the gas spring 331 through the pressing part, the extension and retraction of the gas spring 331 can be controlled, thereby achieving the tilt adjustment of the backrest 320. This allows the user to easily adjust the angle of the backrest 320 through simple operation to adapt to different usage postures and needs.

[0047] Reference Figure 2 and Figure 3 According to the coaxial rotating seat provided in this embodiment of the present invention, the first rotating seat 336 has screw holes (not shown in the figure) on both sides. The screw holes are used to pass fasteners, such as bolts or screws. By passing the fasteners through the screw holes and tightening them, the first rotating seat 336 can be firmly fixed to the underside of the seat cushion 200. This not only provides a stable support point for the end of the gas spring 331, but also ensures the stability and reliability of the entire control assembly during operation.

[0048] Reference Figure 2 and Figure 3 According to the coaxial rotating seat provided in this embodiment of the present invention, the rear side of the connecting frame 310 has a crossbar 311, and the lower end of the backrest 320 is fixedly connected to the crossbar 311 by a connector (such as bolts, welding or other fastening methods). This not only provides a stable support point for the backrest 320, but also ensures that the backrest 320 can remain stable and reliable during rotation.

[0049] In actual use, when a user sits on the seat cushion 200 and leans back, the backrest 320 rotates around the first axis along with the connecting frame 310. Since the lower end of the backrest 320 is connected to the crossbar 311, this ensures that the backrest 320 maintains synchronized movement with the connecting frame 310 during rotation, preventing wobbling or loosening due to unstable connection. The design of the crossbar 311 also disperses the force on the backrest 320 during rotation, thereby extending the service life of the backrest 320 assembly.

[0050] Reference Figure 2 and Figure 3According to the coaxial rotating seat provided in this embodiment of the present invention, the lower end of the connecting frame 310 has a hinge rod 312 extending downward and toward the gas spring 331. The end of the gas spring 331 is connected to the middle of the hinge rod 312 through a hinge (such as a pin or a rotating connector), thereby realizing a hinged connection between the gas spring 331 and the connecting frame 310. This allows the end of the gas spring 331 to rotate flexibly around the middle of the hinge rod 312, enabling the gas spring 331 to better adapt to the movement trajectory of the connecting frame 310 during extension and retraction. At the same time, the structure of the hinge rod 312 provides a stable support point for the gas spring 331, ensuring that the gas spring 331 remains stable during extension and retraction, and avoiding seat shaking or functional failure caused by loosening or instability of the connection part.

[0051] In actual use, when the user operates the lever 332 via the handle 334 and control cable 333 to extend or retract the gas spring 331, the end of the gas spring 331 will rotate around the middle of the hinge rod 312. With the hinge rod 312 connecting it, the rotation process between the connecting frame 310 and the chair back is smoother and more stable, effectively reducing friction and wobbling caused by the extension and retraction of the gas spring 331, thereby improving the overall stability and comfort of the seat. Furthermore, this connection method facilitates installation and maintenance, increasing the service life and reliability of the seat.

[0052] Reference Figure 2 Figure 3 Figure 2 According to the coaxial rotating seat provided in this embodiment of the present invention, a support plate 120 is provided on the upper side of the bottom bracket 100, and the bottom of the seat cushion 200 is fixed to the support plate 120 by fasteners (such as bolts, screws or other fixing devices). This provides a stable support platform for the seat cushion 200 and also ensures the stability and reliability of the seat cushion 200 during use.

[0053] In the actual assembly process, the support plate 120 is first installed on the upper side of the bottom bracket 100, and then the bottom of the seat cushion 200 is fixed to the support plate 120 using fasteners. The support plate 120 effectively distributes the pressure on the seat cushion 200, preventing deformation or damage to the seat cushion 200 due to excessive local stress. At the same time, the use of fasteners ensures a firm connection between the seat cushion 200 and the support plate 120, allowing the seat cushion 200 to remain stable during user use without shaking or loosening.

[0054] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A coaxial rotating seat, characterized in that, The utility model relates to a chair, including: A bottom support is provided with upward extending connecting arms on the left and right sides; A seat cushion is connected to the bottom support and located between the two connecting arms; A back support assembly includes a connecting frame, a backrest and a control mechanism, the connecting frame is arranged between the two connecting arms and rotatably connected to the two connecting arms on the left and right sides, the backrest is connected to the connecting frame and located at the rear side of the seat cushion, one end of the control mechanism is connected to the front end of the seat cushion, the other end is connected to the lower end of the connecting frame, and the control mechanism is configured to control the rotation of the connecting frame; Wherein, the connecting frame and the two connecting arms are connected at the first connecting point, the connecting line between the two first connecting points is the first axis, and the first axis is located above the rear part of the seat cushion, and the connecting frame and the backrest can rotate around the first axis.

2. The swivel chair according to claim 1, wherein The control mechanism includes a gas rod, a toggle, a control line and a handle, one end of the gas rod is rotatably connected to the front end of the seat cushion, the other end is connected to the lower end of the connecting frame, the handle is arranged on one side of the seat cushion, the toggle is arranged on one side of the gas rod, the handle and the toggle are connected through the control line, and the toggle can be driven through the handle and the control line to make the toggle control the extension and retraction of the gas rod.

3. The swivel chair of claim 2, wherein The control mechanism further includes a spring, the spring is sleeved on the outer periphery of the gas rod, and the spring is configured to follow the extension and retraction of the gas rod.

4. The swivel chair of claim 2, wherein The lower side of the front end of the seat cushion is provided with a first rotating seat, the first rotating seat is provided with two downward extending and spaced connecting plates, a rotating shaft is arranged between the two connecting plates, and the end of the gas rod is rotatably connected to the rotating shaft.

5. The swivel chair of claim 4, wherein The control mechanism further includes a second rotating seat, the second rotating seat is located on the right side of the seat cushion, and the handle is rotatably connected to the second rotating seat.

6. The swivel chair of claim 4, wherein The toggle has a pressing portion extending towards the gas rod, the toggle is rotatably connected to the rotating shaft, and the pressing portion can be abutted to the gas rod by rotating the toggle through the handle and the control line.

7. The swivel chair of claim 4, wherein Both sides of the first rotating seat are provided with screw holes, and a fastener is arranged in the screw hole to fix the first rotating seat to the lower side of the seat cushion.

8. The swivel chair of claim 1, wherein The rear side of the connecting frame has a cross bar, and the lower end of the backrest is connected to the cross bar.

9. The swivel chair of claim 2, wherein, The lower end of the connecting frame has a hinge rod extending downward and towards the gas rod, and the end of the gas rod is hingedly connected to the middle part of the hinge rod.

10. The swivel chair of claim 1, wherein, The upper side of the bottom support is provided with a support plate, and the bottom of the seat cushion is fixed to the support plate through a fastener.

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