Zero-gravity seat and vehicle with same

Abstract

The utility model discloses a zero-gravity seat and a vehicle with the zero-gravity seat, the zero-gravity seat comprises a supporting slide rail and a cushion framework, the cushion framework is arranged on the supporting slide rail in a sliding mode, and the zero-gravity seat further comprises a seat adjusting mechanism. The seat adjusting mechanism comprises a linear driving assembly, a front-end rotating connecting rod assembly and a rear-end rotating connecting rod assembly which are in transmission connection in sequence; the cushion framework, the linear driving assembly, the front-end rotating connecting rod assembly, the rear-end rotating connecting rod and the supporting sliding rail are in transmission connection to form a closed multi-connecting-rod rotating mechanism, and the output end of the linear driving assembly linearly moves in the extending direction of the supporting sliding rail. One side of the front-end rotating connecting rod assembly is driven to rotate relative to the supporting sliding rail, the other side of the front-end rotating connecting rod assembly is linked with the front end of the bottom side of the cushion framework to rotate relative to the supporting sliding rail, and the rear end of the cushion framework is linked to drive the rear-end rotating connecting rod assembly to rotate relative to the rear end of the supporting sliding rail. The zero-gravity seat is simple in structure and smooth in linear adjustment.

Description

Technical Field

[0001] The utility model relates to the technical field related to seats, in particular to a zero-gravity seat. Background Art

[0002] Zero-gravity seats are the current development trend of car seats. Zero-gravity seats can improve the riding comfort of car seats. Multiple connections between the various parts of the seat frame are designed as adjustable connections to facilitate the adjustment of the seat posture, thereby providing sufficient and appropriate support for various parts of the body.

[0003] See also Figure 1 Taking a zero-gravity seat in a certain application as an example, the zero-gravity seat structure has a double-link structure on the front side. After the angle adjustment motor 1 rotates and the angle adjuster 6 is unlocked, the front link 2 is driven to rotate around the fixed shaft 3, driving the driven rod 4 to move, so that the angle between the front link 2 and the driven rod 4 increases, thereby driving the entire seat to rotate around the rear shaft 5, realizing the rotation movement of the entire seat, that is, zero gravity adjustment. However, a angle adjuster 6 is provided at the angle adjustment motor 1, and the action or unlocking is controlled by the angle adjuster 6.

[0004] The core driver of this solution is the rotation of the angle adjustment motor → unlocking of the angle adjuster → rotation of the angle adjuster → connecting rod drives the seat to adjust → movement stops, the motor stops rotating → the angle adjuster is locked, wherein the power of the angle adjustment motor is first output to the angle adjuster, and then the power is transmitted to the seat frame through the angle adjuster to adjust the seat, resulting in a delay in the power transmission of the mechanism; secondly, after the seat moves, the locking mechanism of the angle adjuster is also used to lock the seat movement, which requires an additional locking mechanism. In addition, the eccentric movement of the angle adjuster will make the seat adjustment process not smooth; therefore, this solution results in a complex overall structure of the seat, heavy weight, high cost, and a higher risk of potential problems.

[0005] For example, a Chinese patent with application number CN202210755728.X discloses a zero-gravity seat and a vehicle including the seat, which is provided with a seat cushion recliner, a leg support recliner and a lumbar pad recliner. The seat cushion frame is rotatably connected to the support base through the seat cushion recliner, the leg support frame is rotatably connected to the seat cushion frame through the leg support recliner, and the lumbar pad frame is rotatably connected to the seat cushion frame through the lumbar pad recliner. The recliner must be used to adjust the seat.

[0006] Therefore, the zero-gravity chair in the prior art needs to be applied with a recliner, which leads to the problem of delayed power transmission of the mechanism and the existence of problems of heavy weight and high cost. Utility Model Content

[0007] The purpose of the utility model is to solve the problems in the prior art that a zero-gravity seat needs to be applied to a recliner, which leads to a hysteresis in the power transmission of the mechanism and the existence of heavy weight and high cost.

[0008] To solve the above technical problems, an embodiment of the utility model discloses a zero-gravity seat, comprising a supporting slide rail and a seat cushion frame, wherein the seat cushion frame is slidably disposed on the supporting slide rail, and further comprising a seat adjustment mechanism, which is linkedly disposed between the supporting slide rail and the seat cushion frame.

[0009] The seat adjustment mechanism includes a linear drive assembly, a front end rotating link assembly and a rear end rotating link assembly which are sequentially connected in transmission; the linear drive assembly is arranged at the front end of the bottom side of the seat cushion frame, and the output end is transmission-connected to the input end of the front end rotating link assembly; one side of the front end rotating link assembly is pivotally arranged at the front part of the supporting slide rail, and the other side is pivotally connected to the front end of the bottom side of the seat cushion frame; one end of the rear end rotating link assembly is pivotally connected to the rear end of the supporting slide rail, and the other end is connected to the rear end of the bottom side of the seat cushion frame.

[0010] The seat frame, linear drive assembly, front end rotating link assembly, rear end rotating link and support slide rail are connected to form a closed multi-link rotating mechanism. The output end of the linear drive assembly moves linearly along the extension direction of the support slide rail, driving one side of the front end rotating link assembly to rotate relative to the support slide rail, and through the other side of the front end rotating link assembly, the bottom front end of the seat frame is linked to rotate relative to the support slide rail, and the rear end of the seat frame is linked to drive the rear end rotating link assembly to rotate relative to the rear end of the support slide rail.

[0011] By adopting the above-mentioned technical scheme, the present application discloses a zero-gravity seat, which reduces the additional locking mechanism (angle adjuster) and sets a front-end rotating link assembly and a rear-end rotating link assembly, so that the seat cushion frame, the linear drive assembly and the supporting slide rail are linked together to form a closed multi-link rotating mechanism. Therefore, the seat cushion frame can be smoothly adjusted, the NVH performance is better, and the seat cushion frame layout is more flexible, providing layout space for other seat accessories (controller, wiring harness, etc.). Therefore, the zero-gravity seat provided by the present application has a simpler structure, lower cost, and more linear and smooth adjustment.

[0012] The embodiment of the utility model also discloses a zero-gravity chair, wherein the linear drive assembly includes a drive motor, a transmission screw and a screw slider, wherein the drive motor is arranged at the bottom front end of the seat frame, the transmission screw is arranged at the output end of the drive motor, and extends obliquely toward the rear and lower side along the extension direction of the support slide rail, and the screw slider is sleeved on the transmission screw and can slide back and forth along the transmission screw. In addition, the screw slider is pivotally connected to the input end of the front rotating connecting rod assembly, driving the input end of the front rotating connecting rod assembly to reciprocate along the transmission screw.

[0013] By adopting the above technical solution, a screw drive structure is used to achieve self-locking after the mechanism moves, reducing additional locking mechanisms, meeting the requirements of lightweight seats and reducing costs, and having the advantages of high-precision motion control capabilities, strong load capacity, smooth operation and low noise.

[0014] The embodiment of the utility model further discloses a zero-gravity chair, wherein the supporting slide rails include two slide rails arranged in parallel, and each slide rail is provided with a front rotation connection part and a rear rotation connection part at intervals in the length direction;

[0015] One side of the front end rotating link assembly is pivotally connected to the front end rotating connection part, and the rear end rotating link assembly includes a rear end rotating link, one end of the rear end rotating link is pivotally connected to the rear end rotating connection part, and the other end is connected to the bottom rear end of the seat cushion frame.

[0016] By adopting the above technical solution, two slide rails are set, and a front end rotating connection part and a rear end rotating connection part are arranged at intervals in the length direction of each slide rail, providing a rotatable mounting structure for the front end rotating link assembly and the rear end rotating link, so as to facilitate the installation of the front end rotating link assembly and the rear end rotating link on the slide rail.

[0017] The embodiment of the utility model also discloses a zero-gravity seat, wherein the front end rotating link assembly includes a driven link, an intermediate link extending along the width direction of the seat cushion frame, and two pairs of seat cushion end links and a slide rail end link respectively arranged at both ends of the intermediate link.

[0018] One end of each cushion end link is fixed to the corresponding end of the middle link, and the other end is pivotally connected to the bottom front end of the corresponding side of the cushion frame. One end of each rail end link is pivotally connected to the middle of a corresponding cushion end link, and the other end is pivotally connected to the front end of the supporting rail on the corresponding side. The driven link is arranged along the extension direction of the supporting rail, one end is pivotally connected to the lead screw slider, and the other end is pivotally sleeved on the middle of the middle link.

[0019] When viewed along the width direction of the seat cushion frame, when the zero gravity seat is in the initial state, the seat cushion end link extends in the rearward and downward direction, and the other end of the seat cushion end link is aligned with one end of the slide rail end link in the vertical direction. In addition, when the drive motor drives the lead screw slider to slide back and forth along the length direction of the transmission lead screw, the lead screw slider drives the driven link to rotate relatively, the driven link drives the intermediate link to rotate, and the seat cushion end link and the slide rail end link rotate relative to the support slide rail, and drives the seat cushion frame as a whole to rotate relative to the support slide rail.

[0020] By adopting the above technical solution, when the zero-gravity seat is in motion, the driving motor drives the lead screw slider to slide back and forth along the length direction of the transmission lead screw, and the lead screw slider drives the driven connecting rod to rotate relatively, thereby converting the linear sliding of the lead screw slider into the rotation of the driven connecting rod, and the driven connecting rod, the intermediate connecting rod, the seat end connecting rod and the slide rail end connecting rod further link the seat frame as a whole to rotate relative to the supporting slide rail, making the control and rotation smoother and more precise.

[0021] The embodiment of the utility model further discloses a zero-gravity seat, when viewed from the top of the seat cushion frame along the height direction toward the seat cushion frame, the middle connecting rod, the seat cushion end connecting rod and the slide rail end connecting rod are arranged in a "П" shape. When viewed along the width direction of the seat cushion frame, when the zero-gravity seat is in the initial state, a variable angle is formed between the seat cushion end connecting rod and the slide rail end connecting rod. When the zero-gravity seat is in the open state, the angle of the variable angle between the seat cushion end connecting rod and the slide rail end connecting rod becomes larger, and the front end of the seat cushion frame moves in a direction away from the slide rail.

[0022] An embodiment of the utility model also discloses a zero-gravity seat, which also includes a leg rest assembly linked to a seat adjustment mechanism. The leg rest assembly is pivotally arranged at the front end of a seat cushion frame. The leg rest assembly includes a leg rest assembly and a leg rest linkage link. One end of the leg rest linkage link is pivotally connected to the leg rest assembly, and the other end is pivotally connected between the front end rotating link assembly and the seat cushion frame.

[0023] When viewed along the width direction of the seat cushion frame, when the zero-gravity seat is in the initial state, the leg rest assembly is located at the front end of the seat cushion frame and is closed relative to the seat cushion frame. When the zero-gravity seat is in the open state, the front end rotating link assembly links the leg rest linkage link to rotate, and the leg rest linkage link drives the leg rest assembly to open relative to the seat cushion frame.

[0024] By adopting the above-mentioned technical scheme, the zero-gravity seat disclosed in the present application also includes a leg rest assembly linked to the seat adjustment mechanism. The leg rest assembly and the seat cushion frame share a driving system and are linked through a leg rest linkage rod. Therefore, it has a simple structure, the seat cushion and the leg rest can respond in a linked manner, and the cost of the zero-gravity seat is reduced.

[0025] An embodiment of the utility model also discloses a zero-gravity chair, wherein a leg rest assembly includes a leg rest frame and a leg rest connecting rod group, the leg rest connecting rod group includes a leg rest driven connecting rod, a first folding connecting rod and a second folding connecting rod which are rotatably connected in sequence, one end of the leg rest driven connecting rod is pivotally connected to the seat cushion frame, and the other end is pivotally connected to the leg rest linkage connecting rod.

[0026] One end of the first folding link is pivotally connected to the leg rest linkage link, and the other end is pivotally connected to the leg rest frame. One end of the second folding link is pivotally connected to the leg rest driven connecting rod, and the other end is pivotally connected to the leg rest frame. When viewed along the width direction of the seat cushion frame, when the zero gravity seat is in the initial state, the leg rest frame abuts against the front end of the seat cushion frame, and the first folding link and the second folding link are in a retracted state.

[0027] An embodiment of the utility model also discloses a zero-gravity seat, wherein the first folding link and the second folding link both comprise a "V"-shaped folding link, and the middle portion of the first folding link and the second folding link are provided with a pivot shaft, and the first folding link and the second folding link both can be folded and rotated relative to the pivot shaft, and the first folding link and the second folding link are spaced apart and arranged near one end of the leg support frame.

[0028] A connecting shaft is also provided between the first folding link and the second folding link, so that the first folding link and the second folding link can rotate crosswise, and when the zero gravity seat is in an open state, the leg rest linkage link drives the leg rest driven connecting rod to rotate, and links the first folding link and the second folding link to open at the same time, and the leg rest frame opens relative to the seat cushion frame and moves toward one end away from the leg rest frame.

[0029] By adopting the above technical solution, through the setting of the leg rest frame, the leg rest driven connecting rod, the first folding link and the second folding link, when the leg rest linkage link links the leg rest driven connecting rod, the first folding link and the second folding link open at the same time, and the leg rest frame is linked to open, which has the advantages of simple structure, timely response and smooth movement.

[0030] The embodiment of the utility model also discloses a zero-gravity chair, comprising a backrest frame, the backrest frame and the rear end of the seat cushion frame are pivotally connected;

[0031] The driving motor is fixedly connected to the bottom front end of the seat cushion frame by bolts, and the pivotable connection includes any one of movable riveting, movable bolts, pivots and movable rotating shafts.

[0032] The embodiment of the utility model further discloses a vehicle, comprising a passenger cabin, wherein any one of the above-mentioned zero-gravity seats is arranged in the passenger cabin.

[0033] The beneficial effects of the utility model are:

[0034] The utility model discloses a zero-gravity seat, including a support rail, a seat frame and a seat adjustment mechanism, wherein the seat adjustment mechanism is arranged in linkage between the support rail and the seat frame, wherein the linear drive assembly of the seat adjustment mechanism adopts a motor screw transmission mechanism, thereby reducing an additional locking mechanism (angle adjuster), and wherein a front-end rotating connecting rod assembly and a rear-end rotating connecting rod assembly are arranged, so that the seat frame, the linear drive assembly and the support rail are linked together to form a closed multi-link rotating mechanism, thereby being able to smoothly adjust the seat frame, achieving better NVH performance, and providing a more flexible layout of the seat frame, providing a layout space for other seat accessories (controller, wiring harness, etc.), and having the characteristics of simpler structure, lower cost, and more linear and smooth adjustment. The utility model also includes a leg rest assembly arranged in linkage, wherein the leg rest assembly and the seat frame share a set of driving systems, wherein the overall structure is simpler, the seat cushion and the leg rest can respond in linkage, and the cost of the zero-gravity seat is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of a zero-gravity chair in the prior art;

[0036] Figure 1a is a schematic diagram of a zero-gravity chair in the prior art in a normal state;

[0037] Figure 1b is a schematic diagram of a zero-gravity seat in the prior art in an open state;

[0038] Figure 2 A schematic diagram of the exploded structure of a zero-gravity chair provided by an embodiment of the utility model;

[0039] Figure 3 A schematic diagram of a partial structure of a zero-gravity chair provided by an embodiment of the utility model showing a transmission screw;

[0040] Figure 4 Another partial structural schematic diagram of the zero-gravity chair provided by an embodiment of the utility model;

[0041] Figure 5 A schematic diagram of a structure of a closed multi-link mechanism of a zero-gravity seat provided by an embodiment of the utility model;

[0042] Figure 6 Another structural schematic diagram of a closed multi-link mechanism of a zero-gravity seat provided by an embodiment of the utility model;

[0043] Figure 7 A schematic diagram of a partial structure of a zero-gravity seat provided in an embodiment of the utility model when a leg rest assembly is provided;

[0044] Figure 8A schematic diagram of a structure of a closed multi-link mechanism composed of a zero-gravity seat and a leg rest assembly provided in an embodiment of the utility model;

[0045] Fig. 9 Another structural schematic diagram of a closed multi-link mechanism composed of a zero-gravity seat and a leg rest assembly provided in an embodiment of the utility model;

[0046] Fig.10 A schematic diagram of the structure of the zero-gravity seat and the leg rest assembly provided by the embodiment of the utility model in a normal state;

[0047] Fig.11 A schematic diagram of the structure of the zero-gravity seat and the leg rest assembly provided by the embodiment of the utility model in the open state;

[0048] Fig.12 A partial structural schematic diagram of a seat adjustment mechanism and a leg rest assembly of a zero-gravity seat provided in an embodiment of the utility model;

[0049] Fig.13 A schematic diagram of a seat adjustment mechanism and a leg rest assembly of a zero-gravity seat provided by an embodiment of the utility model during deployment;

[0050] Fig.14 A schematic diagram of the seat adjustment mechanism and the leg rest assembly of the zero-gravity seat provided in an embodiment of the utility model during the closing process.

[0051] Description of reference numerals:

[0052] Prior art reference numerals:

[0053] 1. Angle adjustment motor; 2. Front connecting rod; 3. Fixed shaft; 4. Driven rod; 5. Rear shaft; 6. Angle adjuster;

[0054] Reference numerals of this application:

[0055] 100. Supporting slide rails;

[0056] 110, slide rail; 120, front end rotating connection part; 130, rear end rotating connection part;

[0057] 200, seat frame;

[0058] 300. Seat adjustment mechanism;

[0059] 310, driving motor; 320, transmission screw; 330, screw slider;

[0060] 340, driven connecting rod; 350, intermediate connecting rod; 360, cushion end connecting rod; 370, slide rail end connecting rod; 380, rear end rotating connecting rod;

[0061] 301, first rotating pair; 302, first sliding pair; 303, second rotating pair; 304, third rotating pair; 305, fourth rotating pair; 306, fifth rotating pair; 307, sixth rotating pair;

[0062] 400, leg support assembly;

[0063] 410, leg support assembly;

[0064] 411, leg support frame; 412, leg support driven connecting rod; 413, first folding connecting rod; 414, second folding connecting rod;

[0065] 420, leg support linkage rod;

[0066] 401, seventh rotation pair; 402, eighth rotation pair;

[0067] 500. Backrest frame; A. Variable angle. DETAILED DESCRIPTION

[0068] Zero-gravity seats can improve the riding comfort of car seats. Multiple connections between the various parts of the seat frame are designed to be adjustable to facilitate the adjustment of the seat posture, thereby providing adequate and appropriate support for various parts of the body. However, the zero-gravity seats used in the prior art generally require the use of a recliner.

[0069] by Figure 1 Take the zero-gravity seat shown as an example. The front double-link structure of the zero-gravity seat structure is driven by the angle adjustment motor 1 to rotate. After the angle adjuster 6 is unlocked, the front link 2 is driven to rotate around the fixed shaft 3, driving the driven rod 4 to move, so that the angle between the front link 2 and the driven rod 4 increases, thereby driving the seat as a whole to rotate around the rear shaft 5, realizing the rotation of the seat as a whole, that is, zero-gravity adjustment. However, the angle adjuster 6 is provided at the angle adjustment motor 1, and the action or unlocking is controlled by the angle adjuster 6. Figure 1a This is a schematic diagram of the zero-gravity chair in a normal state when it is not activated. Figure 1b This is a schematic diagram of a zero-gravity seat in the open state. However, this type of zero-gravity seat requires the use of a recliner. The power of the recliner motor is first output to the recliner, which transmits the power to the seat frame to adjust the seat, causing a delay in the power transmission of the mechanism, resulting in a complex overall structure, heavy weight, and high cost. And when the zero-gravity seat is equipped with a leg rest, this drive and control method requires an additional leg rest drive mechanism, further increasing the complexity of the zero-gravity seat.

[0070] In order to solve the above technical problems, the implementation method of this embodiment discloses a zero-gravity chair without a recliner. Figure 2 as well as Fig. 9(Overall structural diagram), the zero-gravity seat includes a support rail 100 and a seat cushion frame 200, the seat cushion frame 200 is slidably arranged on the support rail 100, and also includes a seat adjustment mechanism 300, the seat adjustment mechanism 300 is linkedly arranged between the support rail 100 and the seat cushion frame 200.

[0071] It should be noted that the adjustment method of the seat cushion frame 200 and the support rail 100 is the same as the common seat sliding adjustment method, so this embodiment will not be repeated.

[0072] The seat adjustment mechanism 300 includes a linear drive assembly, a front rotating link assembly, and a rear rotating link 380 assembly which are sequentially connected in transmission; the linear drive assembly is arranged at the front end of the bottom side of the seat cushion frame 200, and the output end is in transmission connection with the input end of the front rotating link assembly; one side of the front rotating link assembly is pivotally arranged at the front part of the support rail 100, and the other side is pivotally connected to the front end of the bottom side of the seat cushion frame 200. One end of the rear rotating link 380 assembly is pivotally connected to the rear end of the support rail 100, and the other end is connected to the rear end of the bottom side of the seat cushion frame 200.

[0073] The seat frame 200, the linear drive assembly, the front end rotating link assembly, the rear end rotating link 380 and the support rail 100 are connected by transmission to form a closed multi-link rotating mechanism. The output end of the linear drive assembly moves linearly along the extension direction of the support rail 100, driving one side of the front end rotating link assembly to rotate relative to the support rail 100, and through the other side of the front end rotating link assembly, the bottom front end of the seat frame 200 is linked to rotate relative to the support rail 100, and the rear end of the seat frame 200 is linked to drive the rear end rotating link 380 assembly to rotate relative to the rear end of the support rail 100.

[0074] Those skilled in the art should understand that the linear drive assembly can be a common screw transmission mechanism, a worm gear mechanism, a linear motor, etc. The linear drive motor 310 can realize linear movement of the output end along the extension direction of the support slide rail 100 and has a locking function, thereby eliminating the use of the angle adjuster, making the overall structure of the seat adjustment mechanism 300 simpler.

[0075] More specifically, in the present embodiment, the front-end rotating connecting rod assembly is composed of a plurality of connecting rods. Because the front-end connecting rod assembly includes a plurality of connecting rods, when the output end of the linear drive motor 310 makes linear movement, it can drive the front-end connecting rod assembly to rotate, and convert the linear movement into the rotation of the connecting rod. The front-end connecting rod assembly can further link the seat cushion frame 200 to rotate relative to the supporting slide rail 100, thereby realizing the adjustment of the zero-gravity seat. The seat adjustment and rotation process is smoother, and the NVH performance is also more superior.

[0076] It should also be noted that the pivotable or pivotable connection mentioned in this embodiment can be various common rotational connection methods, such as setting a pivot, setting a rotating shaft, setting a bushing and a rivet for rotational connection, setting a bushing and a rotatable bolt for rotational connection, etc. Technical personnel in this field can design and select according to actual needs, and this embodiment does not make any specific limitations on this.

[0077] Therefore, the present application discloses a zero-gravity seat, which reduces the additional locking mechanism (angle adjuster), and sets a front-end rotating link assembly and a rear-end rotating link 380 assembly, so that the seat cushion frame 200, the linear drive assembly and the support slide rail 100 are linked together to form a closed multi-link rotating mechanism, so that the seat cushion frame 200 can be smoothly adjusted, the NVH performance is better, and the layout of the seat cushion frame 200 is more flexible, providing layout space for other seat accessories (controller, wiring harness, etc.). Therefore, the zero-gravity seat provided by the present application has the characteristics of simpler structure, lower cost, and more linear and smooth adjustment.

[0078] The implementation of this embodiment also discloses a zero-gravity chair, see Figure 2 and Figure 3 The linear drive assembly includes a drive motor 310, a transmission screw 320 and a screw slider 330, wherein the drive motor 310 is disposed at the bottom front end of the cushion frame 200, the transmission screw 320 is disposed at the output end of the drive motor 310, and extends obliquely toward the rear and lower side along the extension direction of the support slide rail 100, and the screw slider 330 is sleeved on the transmission screw 320 and can slide back and forth along the transmission screw 320. In addition, the screw slider 330 is pivotally connected to the input end of the front rotating link assembly, driving the input end of the front rotating link assembly to reciprocate along the transmission screw 320.

[0079] Specifically, in the present embodiment, when looking from the top of the seat cushion frame 200 toward the seat cushion frame 200 in the height direction, the drive motor 310 is arranged at the front end of the bottom side of the seat cushion frame 200 and is located in the middle part of the seat cushion frame 200 along the width direction of the seat cushion frame 200, and the transmission screw 320 extends obliquely toward the rear and downward along the extension direction of the support slide rail 100. For example, when the drive motor 310 drives the transmission screw 320 to rotate clockwise, the screw slider 330 rotates along the transmission screw 320 toward the side close to the drive motor 310; when the drive motor 310 drives the transmission screw 320 to rotate counterclockwise, the screw slider 330 rotates along the transmission screw 320 toward the side away from the drive motor 310, further linking the front end rotation connecting rod assembly and driving the seat cushion frame 200 to rotate in the direction away from the slide rail 110 or in the direction close to the slide rail 110.

[0080] By adopting the above-mentioned structural setting, a screw drive structure is used to achieve self-locking after the mechanism moves, reducing additional locking mechanisms, meeting the requirements of lightweight seats and reducing costs, and having the advantages of high-precision motion control capabilities, strong load capacity, smooth operation and low noise.

[0081] The embodiment of the utility model also discloses a zero-gravity chair, see Figure 2 The support rail 100 includes two parallel rails 110, each rail 110 is provided with a front rotation connection portion 120 and a rear rotation connection portion 130 at intervals in the length direction; wherein

[0082] One side of the front end rotating link assembly is pivotally connected to the front end rotating connection part 120, and the rear end rotating link 380 assembly includes a rear end rotating link 380, one end of the rear end rotating link 380 is pivotally connected to the rear end rotating connection part 130, and the other end is connected to the rear end of the bottom side of the cushion frame 200.

[0083] It should be noted that in the present embodiment, the side where the front end rotating connecting rod assembly and the front end rotating connecting part 120 are connected is in the following embodiments, that is, the slide rail end connecting rod 370, and is rotatably connected to the front end rotating connecting part 120 of the slide rail 110 through the slide rail end connecting rod 370. Similarly, the input end of the front end rotating connecting rod assembly is in the following embodiments, that is, the driven connecting rod 340, and this embodiment will not be repeated here.

[0084] The above-mentioned structural design is adopted to set two slide rails 110, and each slide rail 110 is provided with a front end rotating connection part 120 and a rear end rotating connection part 130 at intervals in the length direction, providing a rotatable mounting structure for the front end rotating link assembly and the rear end rotating link 380, thereby facilitating the installation of the front end rotating link assembly and the rear end rotating link 380 on the slide rail 110.

[0085] Next, the specific structure of the front end rotating connecting rod assembly is described in detail:

[0086] See also Figure 2 to Figure 4 The front end rotating link assembly includes a driven link 340 (i.e., the input end of the front end rotating link assembly in the previous text), an intermediate link 350 extending along the width direction of the seat cushion frame 200, two pairs of seat cushion end links 360 and a slide rail end link 370 (i.e., the side where the front end rotating link assembly in the previous text and the front end rotating connecting part 120 are connected) respectively arranged at both ends of the intermediate link 350.

[0087] One end of each cushion end link 360 is fixed to the corresponding end of the intermediate link 350, and the other end is pivotally connected to the bottom front end of the corresponding side of the cushion frame 200. One end of each rail end link 370 is pivotally connected to the middle of a corresponding cushion end link 360, and the other end is pivotally connected to the front end of the supporting rail 100 on the corresponding side. The driven link 340 is arranged along the extension direction of the supporting rail 100, one end of which is pivotally connected to the lead screw slider 330, and the other end of which is pivotally sleeved on the middle of the intermediate link 350.

[0088] When viewed along the width direction of the seat cushion frame 200, when the zero-gravity seat is in the initial state, for example Figure 3 As shown, the cushion end link 360 extends in the rearward and downward direction, and the other end of the cushion end link 360 is aligned with one end of the rail end link 370 in the vertical direction. In addition, when the driving motor 310 drives the lead screw slider 330 to slide back and forth along the length direction of the transmission lead screw 320, the lead screw slider 330 drives the driven link 340 to rotate relatively, and the driven link 340 drives the intermediate link 350 to rotate, and the cushion end link 360 and the rail end link 370 to rotate relative to the support rail 100, and drives the cushion frame 200 to rotate relative to the support rail 100 as a whole.

[0089] In order to make the movement process of the zero-gravity chair disclosed in this embodiment more obvious, the moving pairs or rotating pairs composed of each connecting rod are described in turn:

[0090] See also Figure 3 and Figure 4 First, the driving motor 310 drives the transmission screw 320 to rotate to form a first rotating pair 301. When the transmission screw 320 rotates, it drives the screw slider 330 to slide to form a first sliding pair 302. Further, the screw slider 330 and the driven connecting rod 340 can be pivotally connected to form a second rotating pair 303. The intermediate connecting rod 350 and the seat end connecting rod 360 are fixedly connected. The seat end connecting rod 360 and the slide rail end connecting rod 370 can be pivotally connected to form a third rotating pair 304. The slide rail end connecting rod 370 and the front end rotating connection part 120 of the slide rail 110 can be pivotally connected to form a fourth rotating pair 305. The seat end connecting rod 360 and the seat frame 200 can be pivotally connected to form a fifth rotating pair 306. The rear end rotating connecting rod 380 and the rear end rotating connection part 130 of the slide rail 110 can be pivotally connected to form a sixth rotating pair 307.

[0091] Specifically, during the operation of the zero-gravity chair, the first rotating pair 301 rotates to drive the first sliding pair 302 to slide, and the first sliding pair 302 drives the second rotating pair 303, the third rotating pair 304, the fourth rotating pair 305, the fifth rotating pair 306 and the sixth rotating pair 307 to rotate in conjunction with each other, and finally drives the rotation of the seat cushion frame 200. The operation process can be seen in Figure 5 and Figure 6 The specific structural actions are as follows: the driving motor 310 drives the screw slider 330 to slide back and forth along the length direction of the transmission screw 320, and the screw slider 330 drives the driven connecting rod 340 to rotate relatively, converting the linear sliding of the screw slider 330 into the rotation of the driven connecting rod 340, and the driven connecting rod 340, the intermediate connecting rod 350, the seat end connecting rod 360 and the slide rail end connecting rod 370 further link the seat frame 200 to rotate as a whole relative to the supporting slide rail 100, and the control and rotation are smoother and more precise.

[0092] And for details, please refer to Figure 5 and Figure 6 ,exist Figure 5 The zero gravity seat is not activated, and Figure 5 In the figure, multiple rotation pairs are indicated, and a schematic diagram of a closed multi-link mechanism formed when the zero-gravity seat is not opened is also shown. The closed multi-link mechanism is shown in FIG. Figure 5 As shown in the connecting lines between the rotating pairs, Figure 6 The zero gravity seat opens. Figure 6 Multiple rotation pairs are also indicated in FIG. 1 , and a schematic diagram of a closed multi-link mechanism formed when the zero-gravity seat is opened is also shown. The closed multi-link mechanism is shown in FIG. Figure 6 It is shown by the connecting lines between the various rotating pairs, and it should be noted that the markings on the various rotating pairs in this application are only for more clearly showing the movement principle and action process of the zero-gravity chair, and do not uniquely limit or indicate specific rotating pairs or moving pairs.

[0093] The implementation of this embodiment also discloses a zero-gravity chair. When looking from the top of the cushion frame 200 toward the cushion frame 200 in the height direction, the middle link 350, the cushion end link 360 and the rail end link 370 are arranged in a "П" shape. When looking along the width direction of the cushion frame 200, when the zero-gravity chair is in the initial state, a variable angle A is formed between the cushion end link 360 and the rail end link 370. When the zero-gravity chair is in the open state, the angle of the variable angle A between the cushion end link 360 and the rail end link 370 becomes larger, and the front end of the cushion frame 200 moves in a direction away from the rail 110. The variable angle A can be seen in FIG. Figure 5 and Figure 6 Indicated in.

[0094] For those skilled in the art, the maximum angle of the variable angle A between the cushion end link 360 and the slide rail end link 370 can be adjusted according to actual needs. The larger the maximum angle of the variable angle A, the larger the zero gravity adjustment range of the cushion frame 200, and the smaller the maximum angle of the variable angle A, the smaller the zero gravity adjustment range of the cushion frame 200. For example, the maximum angle of the variable angle A can be between 100° and 180°. For example, the maximum angle of the variable angle A can be set to 100°, 120°, 140°, 180°, etc. according to needs, and this embodiment does not make any specific limitations on this.

[0095] Furthermore, the zero-gravity seat is described in the normal state, the open state, and the zero-gravity seat recovery state:

[0096] See also Figure 3 and Figure 5 In the initial state of the zero-gravity chair, the transmission screw 320 extends in an obliquely downward direction, and the screw slider 330 is located at the end farthest from the drive motor 310. When the zero-gravity chair needs to be opened, the drive motor 310 starts to rotate and drives the transmission screw 320 to rotate, and the screw slider 330 on the transmission screw 320 slides toward the side close to the drive motor 310, and the screw slider 330 drives the driven connecting rod 340 to rotate, and the driven connecting rod 340 drives the cushion end connecting rod 360 to rotate, and the cushion end connecting rod 360 drives the cushion frame 200 to move in a direction away from the slide rail 110 and props up the cushion frame 200 upward through the slide rail end connecting rod 370. At this time, the zero-gravity chair is in an open state. When the zero-gravity seat needs to be restored to the initial state from the open state, the screw slider 330 on the transmission screw 320 slides toward the side away from the drive motor 310, and the screw slider 330 drives the driven connecting rod 340 to rotate, and the driven connecting rod 340 drives the cushion end connecting rod 360 to rotate, and the cushion end connecting rod 360 drives the cushion frame 200 to move toward the direction close to the slide rail 110. At this time, the zero-gravity seat returns to the initial state.

[0097] Next, the zero-gravity chair disclosed in the present invention is provided with a leg rest assembly 400 and a scheme for linkage with the leg rest assembly 400 is described:

[0098] See also Figure 7The zero-gravity seat also includes a leg support assembly 400 linked to the seat adjustment mechanism 300. The leg support assembly 400 is pivotally arranged at the front end of the seat cushion frame 200. The leg support assembly 400 includes a leg support component 410 and a leg support linkage link 420. One end of the leg support linkage link 420 is pivotally connected to the leg support component 410, and the other end is pivotally connected between the front rotating link assembly and the seat cushion frame 200. It should be noted that the other end of the leg support linkage link 420 is pivotally connected between the front rotating link assembly and the seat cushion frame 200, which means that one end of the leg support linkage link 420 connected to the seat adjustment mechanism 300 is rotatably connected to one of the movable ends of the front rotating link assembly, for example, it is rotatably connected to the intermediate link 350, the driven link 340, the seat cushion end link 360, etc. In this embodiment, it is preferably configured that the leg support linkage link 420 and the intermediate link 350 are rotatably connected. For details, see Figure 2 The middle connecting rod 350 extends along the width direction of the seat cushion frame 200, providing a better rotatable installation position for the leg support linkage connecting rod 420.

[0099] When viewed along the width direction of the seat cushion frame 200, when the zero gravity seat is in the initial state, the leg rest assembly 410 is located at the front end of the seat cushion frame 200 and is closed relative to the seat cushion frame 200. When the zero gravity seat is in the open state, the front end rotating link assembly links the leg rest linkage link 420 to rotate, and the leg rest linkage link 420 drives the leg rest assembly 410 to open relative to the seat cushion frame 200.

[0100] It should be noted that the leg rest assembly 410 can be a common leg rest that is rotationally controlled and connected by a rotating connecting rod, which can realize the linkage between the leg rest and the leg rest linkage connecting rod 420 and make the leg rest relatively open and separate with respect to the seat cushion frame 200.

[0101] Adopting the above-mentioned structural design, the zero-gravity seat disclosed in the present application also includes a leg rest assembly 400 linked to the seat adjustment mechanism 300. The leg rest assembly 400 and the seat cushion frame 200 share a driving system, that is, they share a driving motor 310 and are linked through a leg rest linkage rod 420. Therefore, it has a simple structure, the seat cushion and the leg rest can respond in a linked manner, and the cost of the zero-gravity seat is reduced.

[0102] An embodiment of the utility model also discloses a zero-gravity chair, in which a leg rest assembly 410 includes a leg rest frame 411 and a leg rest connecting rod group, the leg rest connecting rod group includes a leg rest driven connecting rod 412, a first folding connecting rod 413 and a second folding connecting rod 414 which are rotatably connected in sequence, one end of the leg rest driven connecting rod 412 is pivotally connected to the seat cushion frame 200, and the other end is pivotally connected to the leg rest linkage connecting rod 420.

[0103] One end of the first folding link 413 is pivotally connected to the leg support linkage link 420, and the other end is pivotally connected to the leg support frame 411. One end of the second folding link 414 is pivotally connected to the leg support driven connecting rod 412, and the other end is pivotally connected to the leg support frame 411. When viewed along the width direction of the seat cushion frame 200, when the zero gravity chair is in the initial state, the leg support frame 411 abuts against the front end of the seat cushion frame 200, and the first folding link 413 and the second folding link 414 are in a retracted state.

[0104] Furthermore, a seventh rotational pair 401 is formed between one end of the leg support linkage link 420 and the driven link 340, and an eighth rotational pair 402 is formed between the other end and the leg support driven connecting rod 412. It should be noted that, in this embodiment, for ease of understanding, only the seventh rotational pair 401 and the eighth rotational pair 402 are marked, and the leg support assembly 400 includes but is not limited to the seventh rotational pair 401 and the eighth rotational pair 402. For further reference, Figure 8 and Fig. 9 ,in Figure 8 A schematic diagram of the revolving pairs and the closed multi-link mechanism formed when the zero-gravity seat is not opened and has a leg rest is shown. The multi-link mechanism is shown by the connecting lines between the revolving pairs. Fig. 9 A schematic diagram of the revolving pairs and the closed multi-link mechanism formed when the zero-gravity seat is in an open state with a leg rest is shown, and the multi-link mechanism is shown as the connecting lines between the revolving pairs.

[0105] Further, refer to Fig.10 and Fig.11 ,in Fig.10 FIG. 4 shows a schematic diagram of the overall structure of a zero-gravity chair with a leg rest assembly 400 when the chair is not opened. Fig.11 A schematic diagram of the overall structure of a zero-gravity chair with a leg rest assembly 400 in an open state is shown.

[0106] The implementation of this embodiment also discloses a zero-gravity chair, see Fig.12 The first folding link 413 and the second folding link 414 both include a "V"-shaped folding link, and a pivot shaft is provided in the middle of the first folding link 413 and the second folding link 414. The first folding link 413 and the second folding link 414 can be folded and rotated relative to the pivot shaft. The first folding link 413 and the second folding link 414 are spaced apart and arranged near one end of the leg support frame 411.

[0107] A connecting shaft is also provided between the first folding link 413 and the second folding link 414, so that the first folding link 413 and the second folding link 414 can rotate crosswise, and when the zero gravity seat is in an open state, the leg rest linkage link 420 drives the leg rest driven connecting rod 412 to rotate, and links the first folding link 413 and the second folding link 414 to open at the same time, and the leg rest frame 411 opens relative to the seat cushion frame 200 and moves toward one end away from the leg rest frame 411.

[0108] By adopting the above technical solution, through the setting of the leg rest frame 411, the leg rest driven connecting rod 412, the first folding link 413 and the second folding link 414, when the leg rest linkage link 420 links the leg rest driven connecting rod 412, the first folding link 413 and the second folding link 414 are opened at the same time, and the leg rest frame 411 is linked to open, which has the advantages of simple structure, timely response and smooth movement.

[0109] The implementation of this embodiment also discloses a zero-gravity chair, including a backrest frame 500, the backrest frame 500 is pivotally connected to the rear end of the seat cushion frame 200;

[0110] The driving motor 310 is fixedly connected to the bottom front end of the seat cushion frame 200 by bolts, and the pivotable connection includes any one of movable riveting, movable bolts, pivots and movable rotating shafts.

[0111] In summary, the utility model discloses a zero-gravity seat, including a support rail 100, a seat frame 200 and a seat adjustment mechanism 300, the seat adjustment mechanism 300 is arranged in linkage between the support rail 100 and the seat frame 200, the linear drive assembly of the seat adjustment mechanism 300 adopts a motor screw transmission mechanism, reducing an additional locking mechanism (angle adjuster), and a front-end rotating link assembly and a rear-end rotating link 380 assembly are arranged, so that the seat frame 200, the linear drive assembly and the support rail 100 are linked together to form a closed multi-link rotating mechanism, so that the seat frame 200 can be smoothly adjusted, the NVH performance is better, the layout of the seat frame 200 is more flexible, and space is provided for arrangement of other seat accessories (controllers, wiring harnesses, etc.), with a simpler structure, lower cost, and more linear and smooth adjustment. And also includes a leg rest assembly 400 arranged in linkage, the leg rest assembly 400 and the seat frame 200 share a set of drive systems, the overall structure is simpler, the seat cushion and the leg rest can respond in linkage, and the cost of the zero-gravity seat is reduced.

[0112] Finally, the zero-gravity seat linkage leg rest assembly 400 is described in a normal state, an open state, and a zero-gravity seat recovery state:

[0113] See also Fig.13 and Fig.14 In the initial state, the leg support assembly 400 is located on the side close to the seat frame, the transmission screw 320 extends in an oblique downward direction, and the screw slider 330 is located at the end farthest from the drive motor 310. When the zero gravity seat needs to be opened, for example, the drive motor 310 starts to rotate and drives the transmission screw 320 to rotate, and the screw slider 330 on the transmission screw 320 slides toward the side close to the drive motor 310, and the screw slider 330 drives the driven connecting rod 340 to rotate. At this time, the driven connecting rod 340 drives the seat cushion end connecting rod 360 to rotate clockwise, and the slide rail end connecting rod 370 rotates counterclockwise. The seat cushion end connecting rod 360 simultaneously drives the seat cushion frame 200 to move in a direction away from the slide rail 110 and props up the seat cushion frame 200 through the slide rail end connecting rod 370. At the same time, the seat cushion frame 200 There is also a clockwise rotation action, and the leg rest linkage link 420 will move forward and link the leg rest driven connecting rod 412, the leg rest linkage link 420 and the leg rest driven connecting rod 412 drive the first folding link 413 and the second folding link 414 to rotate, the folding angles of the first folding link 413 and the second folding link 414 become larger, the first folding link 413 and the second folding link 414 will gradually open during the rotation process and make the leg rest frame 411 rotate in the direction away from the seat cushion frame 200, at this time the zero gravity seat and the leg rest frame 411 are both in an open state.

[0114] When the zero gravity chair needs to be restored from the open state to the initial state, refer to Fig.14 The lead screw slider 330 on the transmission lead screw 320 slides toward the side away from the drive motor 310, the lead screw slider 330 drives the driven connecting rod 340 to rotate, the driven connecting rod 340 drives the cushion end connecting rod 360 to rotate counterclockwise, the slide rail end connecting rod 370 rotates clockwise, the cushion end connecting rod 360 drives the cushion frame 200 to move toward the direction close to the slide rail 110, the cushion frame 200 also rotates counterclockwise, and the leg support linkage connecting rod 420 will move backward and link the leg support driven connecting rod 4 12. The leg rest linkage link 420 and the leg rest driven connecting rod 412 drive the first folding link 413 and the second folding link 414 to rotate, and the folding angles of the first folding link 413 and the second folding link 414 become smaller. The first folding link 413 and the second folding link 414 will gradually close during the rotation and drive the leg rest frame 411 to rotate toward the direction close to the seat cushion frame 200. Finally, the zero-gravity seat returns to its initial state, and the leg rest assembly 400 is close to one end of the seat cushion frame 200.

[0115] It should be noted that, in this embodiment, for ease of understanding, only the seat cushion frame 200, the backrest frame 500 and the leg support frame 411 are shown for example and explanation. The actual zero-gravity seat should also include other fillings such as sponge, leather, etc., and this embodiment does not make specific limitations on this.

[0116] Example 2

[0117] The implementation manner of this embodiment also discloses a vehicle, including a passenger cabin, in which any of the zero-gravity seats described above is arranged. Taking a sedan as an example, the zero-gravity seat can be arranged on the main driver's or co-driver's side of the sedan. Taking an MPV model as an example, the zero-gravity seat can be arranged not only in the front row of the MPV model, but also in the second row of the MPV model. Those skilled in the art can design and use it according to actual needs, and this embodiment does not make any specific limitation on this.

[0118] It should be noted that, in addition to the implementation methods of the utility model described in the above-mentioned specific specific embodiments, those skilled in the art can easily understand other advantages and functions of the utility model from the contents disclosed in this specification. Although the description of the utility model will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation method. On the contrary, the purpose of introducing the utility model in conjunction with the implementation method is to cover other options or modifications that may be extended based on the claims of the utility model. In order to provide an in-depth understanding of the utility model, the above description contains many specific details, and the utility model can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the utility model, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0119] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0120] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0121] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0122] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0123] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A zero-gravity chair, comprising a support rail and a seat cushion frame, wherein the seat cushion frame is slidably arranged on the support rail, characterized in that: It also includes a seat adjustment mechanism, which is linked and arranged between the support rail and the seat cushion frame; in The seat adjustment mechanism includes a linear drive assembly, a front end rotating link assembly and a rear end rotating link assembly which are sequentially connected in transmission; the linear drive assembly is arranged at the front end of the bottom side of the seat cushion frame, and the output end is transmission-connected to the input end of the front end rotating link assembly; one side of the front end rotating link assembly is pivotally arranged at the front part of the supporting slide rail, and the other side is pivotally connected to the front end of the bottom side of the seat cushion frame; one end of the rear end rotating link assembly is pivotally connected to the rear end of the supporting slide rail, and the other end is connected to the rear end of the bottom side of the seat cushion frame; and The seat cushion frame, the linear drive assembly, the front end rotating link assembly, the rear end rotating link and the support slide rail are driven and connected to form a closed multi-link rotating mechanism, and the output end of the linear drive assembly moves linearly along the extension direction of the support slide rail, driving one side of the front end rotating link assembly to rotate relative to the support slide rail, and through the other side of the front end rotating link assembly, the bottom front end of the seat cushion frame is linked to rotate relative to the support slide rail, and the rear end of the seat cushion frame is linked to drive the rear end rotating link assembly to rotate relative to the rear end of the support slide rail.

2. The zero gravity chair according to claim 1, characterized in that: The linear drive assembly includes a drive motor, a transmission screw and a screw slider; in The drive motor is arranged at the front end of the bottom side of the seat frame, the transmission screw is arranged at the output end of the drive motor and extends obliquely toward the rear and downward along the extension direction of the support slide rail, and the screw slider is sleeved on the transmission screw and can slide back and forth along the transmission screw; and The lead screw slider is pivotally connected to the input end of the front end rotating link assembly, driving the input end of the front end rotating link assembly to reciprocate along the transmission lead screw.

3. The zero gravity chair according to claim 2, characterized in that: The supporting slide rail comprises two slide rails arranged in parallel, and each of the slide rails is provided with a front rotating connecting portion and a rear rotating connecting portion at intervals in the length direction; wherein One side of the front end rotating link assembly is pivotally connected to the front end rotating connection portion; The rear end rotating link assembly comprises a rear end rotating link, one end of which is pivotally connected to the rear end rotating connection portion, and the other end of which is connected to the rear end of the bottom side of the seat cushion frame.

4. The zero gravity chair according to claim 2, characterized in that: The front end rotating link assembly includes a driven link, an intermediate link extending along the width direction of the seat frame, and two pairs of seat end links and a slide rail end link respectively arranged at both ends of the intermediate link; One end of each of the cushion end links is fixed to the corresponding end of the intermediate link, and the other end is pivotally connected to the bottom front end of the corresponding side of the cushion frame; One end of each of the slide rail end connecting rods is pivotally connected to the middle portion of a corresponding one of the seat cushion end connecting rods, and the other end is pivotally connected to the front end of the supporting slide rail on the corresponding side; The driven connecting rod is arranged along the extension direction of the supporting slide rail, one end of which is pivotally connected to the lead screw slider, and the other end of which is pivotally sleeved on the middle part of the intermediate connecting rod; and When viewed along the width direction of the seat cushion frame, when the zero-gravity seat is in an initial state, the seat cushion end link extends in a rearward and downward direction, and the other end of the seat cushion end link is aligned with one end of the slide rail end link in a vertical direction; and When the driving motor drives the screw slider to slide back and forth along the length direction of the transmission screw, the screw slider drives the driven connecting rod to rotate relatively, and the driven connecting rod drives the intermediate connecting rod to rotate, and links the seat cushion end connecting rod and the slide rail end connecting rod to rotate relative to the supporting slide rail, and drives the seat cushion frame as a whole to rotate relative to the supporting slide rail.

5. The zero gravity chair according to claim 4, characterized in that: When viewed from the top of the seat cushion frame in the height direction toward the seat cushion frame, the intermediate connecting rod, the seat cushion end connecting rod and the slide rail end connecting rod are arranged in a "П" shape; and When viewed along the width direction of the seat cushion frame, when the zero gravity seat is in the initial state, a variable angle is formed between the seat cushion end link and the slide rail end link. When the zero gravity seat is in the open state, the variable angle between the seat cushion end link and the slide rail end link becomes larger, and the front end of the seat cushion frame moves in the direction away from the slide rail.

6. The zero-gravity chair according to any one of claims 1 to 5, characterized in that: It also includes a leg support assembly linked to the seat adjustment mechanism, the leg support assembly is pivotally arranged at the front end of the seat cushion frame, the leg support assembly includes a leg support component and a leg support linkage link, one end of the leg support linkage link is pivotally connected to the leg support component, and the other end is pivotally connected between the front end rotation link assembly and the seat cushion frame; and When viewed along the width direction of the seat cushion frame, when the zero-gravity seat is in an initial state, the leg rest assembly is located at the front end of the seat cushion frame and is closed relative to the seat cushion frame; when the zero-gravity seat is in an open state, the front end rotating link assembly links the leg rest linkage link to rotate, and the leg rest linkage link drives the leg rest assembly to open relative to the seat cushion frame.

7. The zero gravity chair according to claim 6, characterized in that: The leg support assembly comprises a leg support frame and a leg support link group, the leg support link group comprises a leg support driven connecting rod, a first folding connecting rod and a second folding connecting rod which are rotatably connected in sequence, one end of the leg support driven connecting rod is pivotally connected to the seat cushion frame, and the other end is pivotally connected to the leg support linkage connecting rod; One end of the first folding link is pivotally connected to the leg support linkage link, and the other end is pivotally connected to the leg support frame; one end of the second folding link is pivotally connected to the leg support driven connecting rod, and the other end is pivotally connected to the leg support frame; and When viewed along the width direction of the seat cushion frame, when the zero-gravity seat is in an initial state, the leg support frame abuts against the front end of the seat cushion frame, and the first folding link and the second folding link are in a retracted state.

8. The zero gravity chair according to claim 7, characterized in that: The first folding link and the second folding link each comprise a "V"-shaped folding link, a pivot shaft is disposed in the middle of the first folding link and the second folding link, the first folding link and the second folding link can be folded and rotated relative to the pivot shaft, and the first folding link and the second folding link are spaced apart and disposed near one end of the leg support frame; and A connecting shaft is also provided between the first folding link and the second folding link, so that the first folding link and the second folding link can rotate crosswise; and When the zero-gravity seat is in an open state, the leg rest linkage link drives the leg rest driven connecting rod to rotate, and links the first folding link and the second folding link to open simultaneously, and the leg rest frame opens relative to the seat cushion frame and moves toward one end away from the leg rest frame.

9. The zero gravity chair according to claim 2, characterized in that: It includes a backrest frame, the backrest frame is pivotally connected to the rear end of the seat cushion frame; in The driving motor is fixedly connected to the bottom front end of the seat cushion frame by bolts, and the pivotable connection includes any one of active riveting, active bolts, pivots and active rotating shafts.

10. A vehicle comprising a passenger cabin, characterized in that: The passenger cabin is provided with a zero-gravity seat as claimed in any one of claims 1 to 9.

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