A zero-gravity adjustable seat

Abstract

This utility model relates to the field of seating technology and discloses a zero-gravity adjustable seat, including a support frame; a seat body, the seat body including a front end side and a rear end side, the front end side being hinged to the support frame via a connecting rod structure; and a drive assembly located on the rear end side of the seat body, comprising a connecting arm with one end connected to the rear end side and the other end hinged to the support frame to form a hinge point, the drive assembly being able to drive the connecting arm to rotate around the hinge point and drive the connecting rod structure to lift or lower the front end side. The beneficial effect of this utility model is that it can effectively free up space at the front of the seat and allow for the integration of other functional components.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, and in particular to a zero-gravity adjustable seat. Background Technology

[0002] As users' demands for driving comfort and health experience continue to rise, seats with zero-gravity adjustment capabilities have gradually become an important feature in high-end automobiles, smart cockpits, and home health furniture. Currently, the mainstream technology for achieving zero-gravity posture adjustment in seats generally uses a lead screw motor as the core drive component. However, in existing designs, such lead screw motors are typically located in the front area of ​​the seat, specifically below the front of the seat cushion frame or near the front edge of the seat. While this layout facilitates direct connection with the seat cushion adjustment linkage, enabling efficient power transmission and motion response, it also introduces significant space occupation issues. Due to the large axial length and radial dimensions of the lead screw motor itself, its installation severely encroaches on the limited internal space at the front of the seat, resulting in a cramped structure in this area and consequently restricting the integration and arrangement of other functional components. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a zero-gravity adjustable seat with a rear-mounted drive component that can effectively release the front space of the seat and allow the integration of other functional components.

[0004] The technical solution adopted by this utility model to solve its technical problem is to provide a zero-gravity adjustable seat, including:

[0005] Support frame;

[0006] The seat body includes a front end side and a rear end side, and the front end side is hinged to the support frame via a linkage structure;

[0007] A drive assembly located at the rear end of the seat body includes a connecting arm with one end connected to the rear end and the other end hinged to the support frame to form a hinge point. The drive assembly can drive the connecting arm to rotate around the hinge point and drive the linkage structure to lift or lower the front end.

[0008] In the aforementioned zero-gravity adjustable seat, the drive assembly is an angle adjuster assembly or a toothed plate assembly.

[0009] In the aforementioned zero-gravity adjustable seat, when the driving component is an angle adjuster component, it includes a transmission wheel, a rotating shaft, and a first drive motor. The transmission wheel is rotatably mounted on the support frame and is engaged with the end of the connecting arm away from the seat body. The rotating shaft is connected to the output end of the first drive motor and passes through the transmission wheel. The first drive motor is detachably mounted on the support frame and can drive the rotating shaft to rotate the connecting arm through the transmission wheel.

[0010] In the aforementioned zero-gravity adjustable seat, the connecting arm is provided in two sets and is symmetrically arranged along the width direction of the seat body. The transmission wheel and the first drive motor are provided in two sets respectively. The two ends of the rotating shaft pass through the output ends of the two sets of the first drive motors and are then mounted on the transmission wheel. The connecting arm has a through hole for the rotating shaft to pass through.

[0011] In the aforementioned zero-gravity adjustable seat, when the drive assembly is a toothed plate assembly, it includes a transmission gear and a second drive motor. The transmission gear is located at the output end of the second drive motor, the second drive motor is detachably mounted on the support frame, and the connecting arm is provided with a serrated portion that meshes with the transmission gear.

[0012] In the aforementioned zero-gravity adjustable seat, two sets of connecting arms are provided and symmetrically arranged along the width direction of the seat body. The two sets of connecting arms are connected by a first synchronous shaft. At least one set of connecting arms is provided with a serrated portion that meshes with the transmission gear.

[0013] In the aforementioned zero-gravity adjustable seat, of the two sets of connecting arms, one set of connecting arms is located away from the serrated portion that meshes with the transmission gear, and the other set of connecting arms is hinged to the support frame via the first synchronous shaft.

[0014] In the aforementioned zero-gravity adjustable seat, the seat body is provided with a second synchronous shaft located on the rear end side. The second synchronous shaft extends along the width direction of the seat body, and the two sets of connecting arms on the side away from the support frame are respectively connected to the second synchronous shaft, and can drive the seat body to rotate around the hinge point through the second synchronous shaft.

[0015] In the aforementioned zero-gravity adjustable seat, the linkage structure includes a first linkage and a second linkage. One end of the first linkage is hinged to the front end of the seat body, and the other end is hinged to the second linkage. The end of the second linkage away from the first linkage is hinged to the support frame. When the connecting arm rotates around the hinge point, the first linkage can rotate relative to the second linkage, thereby lifting or lowering the front end of the seat body.

[0016] In the aforementioned zero-gravity adjustable seat, the linkage structure is provided in two sets and is symmetrically arranged along the width direction of the seat body, and the second linkage of the two sets of linkage structures is connected by a third synchronous shaft.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] 1. In this utility model, the drive assembly is located at the rear end of the seat body. It includes a connecting arm with one end connected to the rear end and the other end hinged to the support frame to form a hinge point. The drive assembly can drive the connecting arm to rotate around the hinge point and drive the linkage structure to lift or lower the front end of the seat body. This design effectively avoids the problem of cramped space in the front of the seat caused by the traditional front-drive layout, significantly freeing up the internal space under the front of the seat. This not only provides ample space for the integration of additional functional modules such as ventilation, heating, massage, or leg support, but also helps to optimize the leg extension posture of the occupant. At the same time, the drive component is far away from the occupant's feet and lower legs, fundamentally eliminating the safety hazard of mechanical interference between the motion mechanism and the human body, and improving safety and comfort during use.

[0019] 2. In this utility model, the driving component is either an angle adjuster assembly or a toothed plate assembly. This design provides two mature and reliable driving implementation methods, improving the feasibility and reliability of the solution, and allowing the selection of the most suitable driving method based on different cost control, performance requirements, and application scenarios, thus enhancing the flexibility and adaptability of the design.

[0020] 3. In this utility model, the linkage structure includes a first linkage and a second linkage. One end of the first linkage is hinged to the front end of the seat body, and the other end is hinged to the second linkage. The end of the second linkage away from the first linkage is hinged to the support frame. When the connecting arm rotates around the hinge point, the first linkage rotates relative to the second linkage, lifting or lowering the front end of the seat body. This design constitutes a stable four-bar linkage mechanism, which can realize smooth, continuous, and controllable lifting and lowering movements of the front end of the seat, effectively improving the comfort of the adjustment process. At the same time, compared with a single-link linkage structure, it can provide better force transmission efficiency and a larger adjustment angle range, making it easier for the seat to reach the ideal zero-gravity posture. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model.

[0022] Figure 2 for Figure 2 A structural diagram from another perspective.

[0023] Figure 3 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0024] Figure 4 for Figure 3 A structural diagram from another perspective.

[0025] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:

[0026] 100, Support frame; 110, Slide rail; 120, Mounting plate; 200, Seat body; 210, Seat frame; 201, Front side; 202, Rear side; 220, Backrest frame; 300, Linkage structure; 310, First link; 320, Second link; 400, Connecting arm; 410, Through hole; 420, Serrated part; 500, Adjuster assembly; 510, Drive wheel; 520, Rotating shaft; 530, First drive motor; 600, Tooth plate assembly; 610, Drive gear; 620, Second drive motor; 700, First synchronous shaft; 710, Second synchronous shaft; 720, Third synchronous shaft. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0028] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0029] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] like Figures 1 to 4 As shown, in this embodiment, a zero-gravity adjustable seat includes:

[0033] Support frame 100.

[0034] The seat body 200 includes a front side 201 and a rear side 202, the front side 201 being hinged to the support frame 100 via a linkage structure 300.

[0035] The drive assembly, located at the rear end 202 of the seat body 200, includes a connecting arm 400, one end of which is connected to the rear end 202, and the other end is hinged to the support frame 100 to form a hinge point. This drive assembly can drive the connecting arm 400 to rotate around the hinge point and drive the linkage structure 300 to lift or lower the front end 201. This design effectively avoids the problem of cramped space in the front of the seat caused by the traditional front-drive layout, significantly freeing up the internal space under the front of the seat. This not only provides ample space for the integration of additional functional modules such as ventilation, heating, massage, or leg support, but also helps to optimize the occupant's leg extension posture. At the same time, the drive component is far away from the occupant's feet and lower legs, fundamentally eliminating the safety hazard of mechanical interference between the motion mechanism and the human body, and improving safety and comfort during use.

[0036] Specifically, such as Figures 1 to 4 As shown, the zero-gravity adjustable seat includes a support frame 100, a seat body 200 hinged to the support frame 100, and a drive assembly disposed between the support frame 100 and the seat body 200 and capable of driving the seat body 200 to perform zero-gravity posture adjustment.

[0037] Furthermore, the support frame 100 is a basic support structure fixedly installed on the bottom of the seat or the vehicle body floor, providing a stable mounting platform for the seat body 200. The support frame 100 includes two sets of slide rails 110 symmetrically arranged along the width direction of the seat body 200. Each set of slide rails 110 has at least two sets of vertically spaced mounting plates 120 along its length direction. The mounting plates 120 are used for hinged or fixed connections with key components in the linkage structure 300 and drive assembly, providing a reliable rotation fulcrum and mounting reference for the seat's motion mechanism.

[0038] Furthermore, the mounting plate 120 is securely connected to the slide rail 110 by bolts or other fasteners. This design not only improves the overall rigidity of the support frame 100, but also facilitates assembly and subsequent maintenance, while providing structural assurance for the smooth movement of the linkage structure 300 and the precise transmission of the drive components.

[0039] In this embodiment, the seat body 200 includes a seat frame 210 and a backrest frame 220. The seat frame 210 is used to support the main weight of the occupant when seated, and its structure includes a front side 201 and a rear side 202. The backrest frame 220 is disposed above the rear side 202 of the seat frame 210 and is hinged to the seat frame 210 through an angle adjuster. Under the action of the drive mechanism, it can adjust the backrest angle relative to the seat frame 210 around the hinge axis to adapt to different sitting posture requirements and achieve independent control of the backrest angle.

[0040] Furthermore, the front end 201 of the seat frame 210 is hinged to the mounting plate 120 on the support frame 100 via a connecting rod structure 300, forming a front rotation fulcrum; the rear end 202 of the seat frame 210 is hinged to another mounting plate 120 on the support frame 100 via a connecting arm 400 of the drive assembly, forming a rear drive fulcrum. This dual-fulcrum layout allows the seat body 200 to rotate around the hinge point of the rear end 202 under the action of the drive assembly, while the front end 201 achieves lifting and lowering motion via the connecting rod structure 300, thus smoothly transitioning from a conventional sitting posture to a zero-gravity posture.

[0041] Furthermore, the linkage structure 300 includes a first linkage 310 and a second linkage 320. One end of the first linkage 310 is hinged to the inner side of the front end 201 of the seat body 200 via a pin, and the other end is hinged to the second linkage 320 via a pin. The end of the second linkage 320 away from the first linkage 310 is hinged to the mounting plate 120 of the support frame 100 via a pin, thus forming a stable four-bar linkage. This design enables smooth, continuous, and controllable lifting and lowering movements of the seat front end, effectively improving comfort during adjustment. Simultaneously, compared to a single-link linkage structure 300, it provides superior force transmission efficiency and a wider adjustment angle range, making it easier for the seat to achieve an ideal zero-gravity posture.

[0042] When the drive assembly drives the connecting arm 400 to rotate around the hinge point formed between it and the support frame 100 at the rear end 202, the rear end of the seat body 200 rotates accordingly, thereby driving the first link 310 to move through the seat frame 210. Since one end of the second link 320 is fixed to the support frame 100, forming a fixed fulcrum, the first link 310 rotates relative to the second link 320, thereby pushing the front end 201 of the seat body 200 to rise or fall smoothly. This movement process realizes the controllable lifting and lowering of the front end of the seat, completing the transition from a conventional sitting posture to a zero-gravity posture.

[0043] Furthermore, the linkage structure 300 is provided in two sets, symmetrically arranged on the left and right sides of the seat frame 210 along the width direction of the seat body 200, to ensure balanced force and smooth movement of the seat during posture adjustment. The second linkage 320 in the two sets of linkage structures 300 is connected by a third synchronous shaft 720 extending along the width direction of the seat body 200, ensuring that the two second linkages 320 rotate synchronously during movement. This design effectively avoids problems such as seat front tilting, jamming, or structural twisting caused by asynchronous movement of the left and right linkages, significantly improving the coordination of lifting and lowering actions and the overall rigidity of the structure, enhancing the stability and safety of the zero-gravity adjustment process.

[0044] In this embodiment, to ensure the consistency of movement on both sides of the seat and the overall rigidity of the structure, a second synchronous shaft 710 is provided on the rear end side 202 of the seat body 200. This second synchronous shaft 710 is arranged along the width direction of the seat and is connected to the connecting arms 400 on both sides respectively. This design not only ensures that the seat can move synchronously on both sides during zero-gravity posture adjustment, avoiding tilting or jamming caused by unilateral drive, but also enhances the stability and durability of the overall structure.

[0045] In this embodiment, the drive assembly is located inside the rear end side 202 of the seat body 200, and forms a stable hinge structure with the second synchronous shaft 710 and the mounting plate 120 on the support frame 100 through the connecting arm 400. Specifically, the drive assembly includes a connecting arm 400, one end of which is sleeved on the second synchronous shaft 710, and the other end is hinged to the mounting plate 120 of the support frame 100 to form a hinge point. When the drive assembly is activated, it drives the connecting arm 400 to rotate around the hinge point, thereby driving the rear end side 202 of the entire seat body 200 to move up or down through the second synchronous shaft 710. This action is further transmitted to the front end of the seat through the linkage structure 300, realizing the smooth lifting or lowering of the front end side 201, completing the transition from a conventional sitting posture to a zero-gravity posture.

[0046] Furthermore, the drive components can be common electric drive units such as the 500 angle adjuster assembly or the gear plate drive assembly, which can be flexibly selected according to product positioning, cost control and performance requirements, thereby improving the versatility and scalability of the solution.

[0047] Example 1

[0048] like Figures 1 to 2As shown, when the drive assembly is the adjuster assembly 500, it includes a drive wheel 510, a rotating shaft 520, and a first drive motor 530. The drive wheel 510 is rotatably mounted on the mounting plate 120 of the support frame 100 and engages with the end of the connecting arm 400 away from the seat body 200, driving the connecting arm 400 to rotate around its hinge point with the mounting plate 120 during operation. The rotating shaft 520 is connected to the output end of the first drive motor 530 and passes through the drive wheel 510, allowing the drive wheel 510 to rotate synchronously under the drive of the rotating shaft 520. The side of the first drive motor 530 away from its output end is fixed to the mounting plate 120 of the support frame 100 by bolts, clips, or other detachable connections, thus achieving stable motor installation and convenient future maintenance and replacement.

[0049] Furthermore, two sets of connecting arms 400 are provided, symmetrically arranged on the left and right sides of the seat body 200 along its width. The end of each connecting arm 400 furthest from the support frame 100 is sleeved on and fixedly connected to the second synchronous shaft 710, allowing the connecting arms 400 on both sides to synchronously drive the seat body 200 to rotate around the rear hinge point during movement. This design effectively ensures the left-right synchronicity of the seat during lifting and lowering, avoiding structural distortion, tilting, or jamming caused by unilateral force or drive deviation, significantly improving the smoothness of the adjustment process and passenger comfort.

[0050] Furthermore, two sets of transmission wheels 510 and first drive motors 530 are respectively arranged on the left and right sides of the seat to achieve symmetrical dual-side drive. The rotating shaft 520 is a through shaft extending along the width of the seat, with its two ends passing through the output ends of the two sets of first drive motors 530, and then passing through the corresponding transmission wheels 510 to form an integrated transmission structure. This shared rotating shaft 520 design not only achieves mechanical hard synchronization, eliminating the need for left-right coordination control by an electronic control system, but also improves transmission accuracy and system reliability. In addition, each connecting arm 400 is provided with a through hole 410 for the rotating shaft 520 to pass through. The through hole 410 and the rotating shaft 520 can be fitted with a clearance fit or supported by bearings to reduce frictional resistance during rotation.

[0051] Example 2

[0052] like Figures 3 to 4As shown, when the drive assembly is a gear plate assembly 600, it includes a transmission gear 610 and a second drive motor 620. The transmission gear 610 is located at the output end of the second drive motor 620 and rotates synchronously with the output shaft; the second drive motor 620 is detachably mounted on the mounting plate 120 of the support frame 100. Preferably, the second drive motor 620 is fixed to the side of the mounting plate 120 of the support frame 100 away from the connecting arm 400 by bolts, clips, or other detachable connection methods, and its output shaft passes through the side wall of the mounting plate 120 and extends to the inner side to facilitate the installation and positioning of the transmission gear 610. This design not only realizes the external installation of the drive unit, facilitating assembly and subsequent maintenance, but also effectively utilizes the lateral space of the support frame 100, avoiding encroachment on the internal functional areas of the seat.

[0053] Furthermore, the end of the connecting arm 400 is provided with a circumferentially arranged serrated portion 420, which meshes with the transmission gear 610 to form a gear-arc rack transmission pair. When the second drive motor 620 is started, its output shaft drives the transmission gear 610 to rotate. Through the meshing transmission with the serrated portion 420 on the connecting arm 400, the rotational motion is converted into the swinging motion of the connecting arm 400 about the hinge point between it and the support frame 100, thereby driving the rear end side 202 of the seat body 200 to rotate. This drive method reduces intermediate transmission mechanisms and can directly convert rotational motion into swinging output, significantly simplifying the overall drive system and improving the system's integration and reliability.

[0054] Furthermore, two sets of connecting arms 400 are provided, symmetrically arranged on the left and right sides of the seat body 200 along its width. The end of each connecting arm 400 furthest from the support frame 100 is fixed to the second synchronous shaft 710 by means of snap-fit, keying, or fasteners, allowing the connecting arms 400 on both sides to synchronously drive the seat body 200 to rotate around the rear hinge point during movement. This design ensures consistent movement on both sides of the seat during posture adjustment, avoiding uneven load distribution, tilting, or structural fatigue, significantly improving the smoothness of the adjustment process and ride comfort.

[0055] Furthermore, the two sets of connecting arms 400 are connected by a first synchronous shaft 700 extending along the width of the seat to achieve mechanical forced synchronization. Among them, the serrated portion 420 of at least one set of connecting arms 400 meshes with the transmission gear 610, serving as the active drive side; the other set of connecting arms 400 passively follows the movement through the first synchronous shaft 700, achieving power transmission and motion synchronization.

[0056] Preferably, in this embodiment, only one set of connecting arms 400 is provided with a serrated portion 420 and meshes with the transmission gear 610, and this side is the driving side; while the other set of connecting arms 400 is not provided with a serrated portion 420, and its end away from the second synchronous shaft 710 is hinged to the mounting plate 120 of the support frame 100 through the first synchronous shaft 700, that is, the first synchronous shaft 700 also serves as the rotation fulcrum of the connecting arm 400 on this side.

Claims

1. A zero-gravity adjustment seat, characterized by, include: Support frame; The seat body includes a front end side and a rear end side, and the front end side is hinged to the support frame via a linkage structure; A drive assembly located at the rear end of the seat body includes a connecting arm with one end connected to the rear end and the other end hinged to the support frame to form a hinge point. The drive assembly can drive the connecting arm to rotate around the hinge point and drive the linkage structure to lift or lower the front end.

2. A zero-gravity adjustment seat as claimed in claim 1, wherein, The drive component is an angle adjuster component or a toothed plate component.

3. A zero-gravity adjustment seat as claimed in claim 2, wherein, When the drive assembly is an angle adjuster assembly, it includes a transmission wheel, a rotating shaft, and a first drive motor. The transmission wheel is rotatably mounted on the support frame and is engaged with the end of the connecting arm away from the seat body. The rotating shaft is connected to the output end of the first drive motor and passes through the transmission wheel. The first drive motor is detachably mounted on the support frame and can drive the rotating shaft to rotate the connecting arm through the transmission wheel.

4. A zero-gravity adjustment seat as claimed in claim 3, wherein, The connecting arm is provided in two sets and is symmetrically arranged along the width direction of the seat body. The transmission wheel and the first drive motor are provided in two sets respectively. The two ends of the rotating shaft pass through the output ends of the two sets of the first drive motors and are then inserted into the transmission wheel. The connecting arm has a through hole for the rotating shaft to pass through.

5. A zero-gravity adjustment seat as claimed in claim 2, wherein, When the drive assembly is a toothed plate assembly, it includes a transmission gear and a second drive motor. The transmission gear is located at the output end of the second drive motor. The second drive motor is detachably mounted on the support frame, and the connecting arm is provided with a serrated part that meshes with the transmission gear.

6. A zero-gravity adjustment seat as claimed in claim 5, wherein, The connecting arms are provided in two sets and are symmetrically arranged along the width direction of the seat body. The two sets of connecting arms are connected by a first synchronous shaft. At least one set of connecting arms is provided with a serrated part that meshes with the transmission gear.

7. A zero-gravity adjustment seat as claimed in claim 6, wherein, Of the two sets of connecting arms, one set of connecting arms is located away from the serrated portion that meshes with the transmission gear, while the other set of connecting arms is hinged to the support frame via the first synchronous shaft.

8. A zero-gravity adjustment seat according to claim 4 or 5, wherein, The seat body is provided with a second synchronous shaft located on the rear end side. The second synchronous shaft extends along the width direction of the seat body, and the two sets of connecting arms on the side away from the support frame are respectively connected to the second synchronous shaft, and can drive the seat body to rotate around the hinge point through the second synchronous shaft.

9. A zero-gravity adjustment seat as claimed in claim 1, wherein, The linkage structure includes a first linkage and a second linkage. One end of the first linkage is hinged to the front end of the seat body, and the other end is hinged to the second linkage. The end of the second linkage away from the first linkage is hinged to the support frame. When the connecting arm rotates around the hinge point, the first linkage can rotate relative to the second linkage and lift or lower the front end of the seat body.

10. A zero-gravity adjustment seat as claimed in claim 9, wherein, The linkage structure has two sets, which are symmetrically arranged along the width direction of the seat body, and the second linkage of the two sets of linkage structures are connected by a third synchronous shaft.

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