WO2023024816A1

WO2023024816A1 - Zero-gravity seat structure

Info

Publication number: WO2023024816A1
Application number: PCT/CN2022/108557
Authority: WO
Inventors: 马志; 龚晓
Original assignee: 延锋国际汽车技术有限公司
Priority date: 2021-08-26
Filing date: 2022-07-28
Publication date: 2023-03-02
Also published as: CN113547961A; CN113547961B

Abstract

A zero-gravity seat structure, which comprises a backrest (700), a seat cushion (500), and a leg rest component (200), and the leg rest component (200) is movable relative to the seat cushion (500). The zero-gravity seat structure further comprises a drive motor (800) and a connecting rod mechanism (100), the drive motor (800) drives the seat cushion (500) and the leg rest component (200) synchronously by means of the connecting rod mechanism (100) and drives the backrest (700) synchronously by means of the seat cushion (500), so as to achieve simultaneous adjustment of the backrest (700), the seat cushion (500), and the leg rest component (200).

Description

Zero Gravity Seat Structure

technical field

The invention relates to the field of car seats, in particular to a zero-gravity seat structure.

Background technique

Zero-gravity seats are one of the current development trends in car seats. Most of the zero-gravity seats currently on the market use multiple motors to achieve adjustment, which makes the structure of the zero-gravity seat complex and expensive.

Chinese invention patent application CN113147531A discloses a compact multi-directional adjustable zero-gravity seat frame, which includes: a base, a seat frame is arranged above the base, and a backrest frame is connected to the rear of the seat frame through a recliner. The front part and the rear part are respectively provided with seat frame adjustment links between the base, and these seat frame adjustment links can rotate in the vertical plane, and each seat frame adjustment link is hinged with the base through a hinge shaft respectively, wherein, The seat frame adjusting link located at the rear of the seat frame is hinged with the seat frame, the seat frame adjusting link located at the front is connected with the seat frame through an inclination adjusting link, and the seat frame adjusting links located at the front and rear are respectively connected with When the driving mechanism is rotated, the seat frame side plate of the seat frame on the same side and the backrest side plate of the backrest frame are all provided with reinforcement structures, and the rear side of the backrest side plate is provided with a guiding and restraining mechanism for guiding the safety belt to slide. In this prior art, the height adjustment and inclination adjustment of the seat frame can be realized, providing stable support for the seat frame, and ensuring the safety of the seat belt system.

In this prior art, the height adjustment and inclination adjustment of the seat frame are realized by using double motors in conjunction with an adjustment structure formed by multiple connecting rods and a rotating drive mechanism, and this adjustment structure has not been applied to a synchronously driven leg rest mechanism.

Contents of the invention

The technical problem to be solved by the present invention is to solve the problem of complex structure and high cost in the existing zero-gravity seat that uses more than two motors in conjunction with the linkage mechanism to realize the synchronous adjustment of the backrest, seat cushion and leg rest. The invention provides a zero-gravity seat structure which realizes the synchronous adjustment of the backrest, the seat cushion and the leg rest under the condition of adopting a common motor and a link mechanism, and has a simple structure and low cost.

In order to achieve the above object, the technical solution adopted in the present invention is:

A zero-gravity seat structure includes a backrest, a seat cushion and a leg rest part. Preferably, the bottom of the backrest is hinged to the rear end of the seat cushion through a recliner. The leg rest part is movable relative to the seat cushion. Preferably, the upper end of the leg rest part is hinged to the front end of the seat cushion.

According to the present invention, the zero-gravity seat structure further includes a driving motor, especially exactly one driving motor and a link mechanism, the driving motor is configured to synchronously drive the seat cushion and the leg rest part through the link mechanism And the backrest is synchronously driven by the seat cushion.

In a preferred embodiment of the present invention, the zero-gravity seat structure further includes a seat installation part, and the seat cushion and the motor are both installed on the seat installation part. Preferably, the seat mounting part is supported on a fixed foundation; or mounted on a pair of slide rails, and the seat mounting part is configured to carry the backrest, seat cushion, leg rest part and driving motor along the A pair of slide rails move back and forth.

In a preferred embodiment of the present invention, the seat mounting part includes a pair of seat cushion frame side panels.

In a preferred embodiment of the present invention, the linkage mechanism includes:

a drive link rotatably mounted on a first end thereof about a first axis of rotation, the drive motor configured to drive the drive link to rotate about the first axis of rotation;

a seat cushion side panel of the seat cushion, the seat cushion side panel having a first sliding groove;

A leg support link, the rear end of the leg support link is hinged to the second end of the drive link opposite to the first end, and the hinged part of the leg support link and the drive link is at the first Guided in a chute, the leg rest link has a second chute, in which the slider protruding from the seat cushion is guided, and the front end of the leg rest link is connected, in particular hinged, to the leg rest part .

In a preferred embodiment of the present invention, the hinge between the leg rest link and the drive link is realized by a first stepped bolt, wherein the first stepped bolt passes through the first sliding slot and the drive link mounting hole and is screwed Insert it into the rear mounting hole of the leg rest link.

In a preferred embodiment of the present invention, the sliding member is realized by a connecting rod fixed with the seat cushion and a second stepped bolt, wherein the second stepped bolt passes through the second slide groove and is screwed into the seat cushion fixed. in the mounting hole of the connecting rod.

In a preferred embodiment of the present invention, the front end of the leg support link is hinged to the leg support component through fasteners.

In a preferred embodiment of the present invention, the zero-gravity seat structure includes a pair of link mechanisms, that is, a left link mechanism and a right link mechanism, wherein one of the pair of link mechanisms Exactly one drive motor is provided, or each link mechanism is provided with one drive motor, and the two drive motors can work synchronously.

In a preferred embodiment of the present invention, a sector gear is arranged at the first end of the driving link, and the sector gear meshes with the output gear of the driving motor.

In a preferred embodiment of the present invention, the side panel of the cushion is hinged to the side panel of the cushion bracket of the seat mounting part at its rear side.

In a preferred embodiment of the present invention, the linkage mechanism includes at least one driving link, at least one seat cushion sliding part, at least one leg rest link, at least one intermediate sliding part, at least one intermediate sliding part link and At least one leg rest sliding part; the seat cushion sliding part is slidably connected with the seat cushion, the leg rest sliding part is slidably connected with the leg rest part, and one end of the driving link is connected to the power output of the driving motor end drive connection, the other end of the drive link is hinged with the seat cushion sliding part; one end of the leg rest link is hinged with the seat cushion slide part, and the other end of the leg rest link is hinged with the The leg rest sliding part is hinged, the leg rest connecting rod is slidably connected to the middle sliding part, one end of the middle sliding part connecting rod is fixedly connected to the seat cushion, one end of the middle sliding part connecting rod is connected to the The middle sliding part is hinged.

In a preferred embodiment of the present invention, the seat installation part includes a pair of seat cushion support side panels, and the seat cushion includes a pair of seat cushion side panels and a seat pan fixed on the pair of seat cushion side panels. In a preferred embodiment of the present invention, the rear ends of the pair of seat cushion side panels are hinged to the rear ends of the pair of seat cushion frame side panels through a first synchronous hinge shaft. In a preferred embodiment of the present invention, the bottom of the backrest is hinged to the rear ends of the pair of side panels of the seat cushion through an adjuster. In a preferred embodiment of the present invention, the driving motor is mounted on one of the side plates of the seat cushion support, and an output gear is keyed to the power output end of the driving motor. In a preferred embodiment of the present invention, one end of the driving link is hinged to the side plate of the seat cushion support through a second synchronous hinge shaft. In a preferred embodiment of the present invention, a sector gear is arranged at one end of the driving link, and the sector gear meshes with the output gear.

In a preferred embodiment of the present invention, the seat cushion sliding part consists of a first long groove arranged on the side plate of the seat cushion and passes through the first long groove and can be positioned on the first The first stepped bolt sliding in the elongated slot is formed, and the other end of the driving link is hinged to one end of the leg support link by the first stepped bolt.

In a preferred embodiment of the present invention, the middle sliding part consists of a second long slot arranged on the leg support link and passes through the second long slot and can be positioned at the second long slot. The second stepped bolt sliding in the bar groove is formed, one end of the connecting rod of the intermediate sliding part is fixedly connected with the basin, and the second stepped bolt is connected with the other end of the connecting rod of the intermediate sliding part.

In a preferred embodiment of the present invention, the leg rest part comprises a leg rest base and a leg rest sliding part, the upper end of the leg rest base is hinged on the front side of the bidet; the leg rest The sliding part is a leg rest panel, and the leg rest panel is slidably arranged on the leg rest base. Preferably, the other end of the leg rest link is hinged on the leg rest panel.

In a preferred embodiment of the present invention, a leg rest comfort layer is arranged on the leg rest panel.

In a preferred embodiment of the present invention, the backrest, the seat cushion and the leg rest parts respectively have soft covers.

The beneficial effects of the present invention are:

A zero-gravity seat structure provided by the present invention, wherein, through the simple structure and low-cost linkage mechanism, if necessary, under the condition of using a single motor, the linkage between the inclination angle of the seat basin, the inclination angle of the backrest and the extension of the leg rest mechanism is realized Adjustment function.

The technical features mentioned above, the technical features to be mentioned below and the technical features shown individually in the drawings can be combined with each other arbitrarily, as long as the combined technical features are not mutually contradictory. All possible combinations of features are technical contents explicitly recorded in this document. Any one of a plurality of sub-features included in the same sentence may be applied independently without necessarily being applied together with other sub-features.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings that are required in the description of the embodiments or the prior art.

Fig. 1 is an overall structural diagram of the zero-gravity seat structure of the present invention.

Fig. 2 is a structural schematic diagram of the side panel of the seat cushion bracket of the zero-gravity seat structure of the present invention.

Fig. 3 is a structural schematic diagram of the seat cushion side panel of the zero-gravity seat structure of the present invention.

Fig. 4 is an assembly diagram of the seat cushion side panel and the seat cushion support side panel of the zero-gravity seat structure of the present invention.

Fig. 5 is a structural schematic diagram of the leg rest link of the zero-gravity seat structure of the present invention.

Fig. 6 is an assembly diagram of the driving link and the second synchronous hinge shaft of the zero-gravity seat structure of the present invention.

Fig. 7 is an assembly diagram of the seat cushion side panel, the seat cushion support side panel and the linkage mechanism of the zero-gravity seat structure of the present invention.

Fig. 8 is a structural schematic diagram of the leg rest part of the zero-gravity seat structure of the present invention.

Fig. 9 is an assembly diagram of the leg rest panel and the leg rest link of the leg rest component of the present invention.

Fig. 10 is an exploded view of the zero-gravity seat structure of the present invention.

Fig. 11 is a schematic diagram of the zero-gravity seat structure of the present invention in an initial adjustment state.

Fig. 12 is a schematic diagram of the zero-gravity seat structure of the present invention during adjustment.

Fig. 13 is a schematic diagram of the zero-gravity seat structure of the present invention in the final adjustment state.

Fig. 14 is a schematic diagram of the principle of the zero-gravity seat structure in the initial adjustment state of the present invention.

Fig. 15 is a schematic diagram of the principle of the zero-gravity seat structure in the adjustment process of the present invention.

Fig. 16 is a schematic diagram of the principle of the zero-gravity seat structure in the final adjustment state of the present invention.

Detailed ways

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "longitudinal", "vertical", "lateral" etc. indicate Orientation or positional relationship is a technical term in the field of automotive engineering. In order to indicate the orientation or positional relationship based on the drawings, it is convenient to describe the simplified description of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation. Specific orientation configurations and operations, therefore, are not to be construed as limitations on the invention.

The detailed structure of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

FIG. 1 shows a zero-gravity seat structure, which mainly includes a seat back 700 , a seat cushion 500 , a seat installation part 300 , a leg rest part 200 and a link mechanism 100 . The seat back 700 is hinged to the seat cushion 500 via the recliner 600 so that on the one hand the seat back can turn together with the seat cushion and on the other hand the seat back can turn independently of the seat cushion. The seat mounting part 300 is provided on the slide rail 900 . The seat cushion 500 is connected with the seat mounting part 300 through the link mechanism 100 and the first synchronous hinge shaft 120 (see FIG. 4 , FIG. 10 and FIG. 11 ). The leg rest member 200 is provided at the front end of the seat cushion 500 . The link mechanism 100 can be driven by the driving motor 800 for adjusting the longitudinal angle of the seat cushion 500 and controlling the unfolding and closing of the leg rest member 200 .

In FIG. 1 , for the seat back 700 , the seat cushion 500 , and the leg rest member 200 , the corresponding upholstery is omitted, respectively, and thus only their skeletons are described in FIG. 1 .

The seat mounting part 300 may include a pair of cushion support side panels. The left-hand side panel 401 of the cushion support is depicted in FIG. 2 . The seat cushion bracket side plate 401 is sequentially provided with a mounting hole 403 for the second synchronous hinge shaft 121 , a motor transmission through hole 404 , and a mounting hole 402 for the first synchronous hinge shaft 120 opened above the rear side. The driving motor 800 is fixed on the side plate 401 of the cushion support, and the driving motor 800 is provided with an outwardly protruding motor output gear 801 , which extends through the motor transmission through hole 404 to the inside of the side plate 401 of the cushion support. The right side cushion support side panel can be formed substantially symmetrically with the left cushion support side panel 401, but the right seat cushion support side panel can not be equipped with a drive motor 800 and therefore does not need to be provided with a drive motor 800. the mounting holes. In the case where a pair of seat cushion bracket side panels are respectively equipped with driving motors 800, the two driving motors should work synchronously. Furthermore, instead of the drive motor 800 being provided on the left side cushion frame side panel 401, the drive motor may be provided only on the right side cushion frame side panel.

As shown in FIG. 1 , the seat cushion 500 includes a seat pan 500a disposed at the front end and seat cushion side panels 301 at both sides. 3 and 4 depict the cushion side panel 301 on the left side. The seat cushion side panel 301 is provided with a mounting slot 304 for the first elongated slot 106 and a mounting hole 302 for the first synchronous hinge shaft 120 sequentially from front to back. Wherein, the opening direction of the mounting groove 304 on the plane of the seat cushion side panel 301 is inclined, and the vertical position of the front end is lower than that of the rear end. The first elongated groove 106 may form a first sliding groove of the cushion side panel 301 , and the first stepped bolt 105 a forms a first sliding member guided in the first sliding groove. The rear end of the seat cushion side panel 301 is respectively provided with two mounting holes 305 for the connecting plate, which are used to be fixedly connected with the connecting plate of the recliner 600 by fasteners. The right side cushion side panel can be formed substantially symmetrically to the left side cushion side panel 301 . When assembling, the seat cushion side plate 301 can be arranged on the upper outer side of the seat cushion support side plate 401, and the first synchronous hinge shaft 120 passes through the mounting holes for the first synchronous hinge shaft 120 of a pair of seat cushion support side plates 402 and a pair of mounting holes 302 for the first synchronous hinge shaft 120 of the seat cushion side plate, so that the seat cushion support side plate 401 and the seat cushion side plate 301 on each side are connected together by hinges, so that the seat The pad 500 can rotate relative to the seat installation part 300 around the first synchronous hinge shaft 120 .

The pair of link mechanisms 100 may be substantially symmetrically arranged left and right in the zero-gravity seat structure. Referring to Fig. 5 to Fig. 10, the linkage mechanism 100 on the left side is described, and the linkage mechanism 100 includes a leg rest link 100c (see Fig. 5), a drive link 100d (see Fig. 6), an intermediate sliding part 100b (see Fig. 5) Seat cushion sliding part 100a (see Fig. 4 and Fig. 10 ) and intermediate sliding part link 100e (see Fig. 8 to Fig. 10 ). The intermediate slide member link 100e is provided below the seat pan 500a. The seat cushion sliding part 100a is composed of a first elongated groove 106 and a first stepped bolt 105a, wherein the first elongated groove 106 is installed in the installation groove 304 of the seat cushion side plate 301 . The middle sliding part 100b is composed of the second elongated groove 102 and the second stepped bolt 105b provided on the side wall of the leg rest link 100c. As shown in FIG. 5 , the leg support connecting rod 100 c is provided with a front mounting hole 103 for the leg support connecting rod at its front end, and a rear mounting hole 104 for the leg support connecting rod is provided at its rear end. As shown in Figure 6, the drive link 100d is provided with an installation 112 for the second synchronous hinge shaft 121 on the lower side wall, and the drive link 100d is arranged with an arc-shaped rack 111 on the lower rear side, and the drive link 100d is provided with a driving link mounting hole 113 at its top end, and the driving link 100d is also provided with a limiting slot 114 at its bottom end. Cooperating with the limit groove 114 , a limit pin (not shown in the figure) is provided on the seat cushion support side plate 401 to limit the rotation angle range of the driving link 100 d relative to the seat cushion support side plate 401 .

When installed, the corresponding one end of the second synchronous hinge shaft 121 passes through the installation hole 112 for the second synchronous hinge shaft 121 of the drive link 100d and the hole 112 for the second synchronous hinge shaft 121 of the seat cushion bracket side plate 401 . Mounting hole 403 . The second synchronous hinge shaft 121 can rotate freely, and the limit pin on the seat cushion support side plate 401 is inserted into the corresponding limit slot 114 to limit the rotation angle of the driving link 100d relative to the seat cushion support side plate 401 . The first stepped bolt 105a (see FIG. 7 ) passes through the first elongated slot 106 and the rear mounting hole 104 of the leg support connecting rod from the outermost side, and is finally locked in the driving connecting rod mounting hole 113 . The rack 111 of the drive link 100d meshes with the motor output gear 801 , and the drive link 100d is driven to rotate forward or reverse around the second synchronous hinge shaft 121 by controlling the drive motor output gear 801 to rotate forward or reverse. The driving link 100d can be configured to push the leg rest link 100c to move forward along the first elongated slot 106 while raising the front end of the seat cushion side panel 301 . The second synchronous hinge shaft 121 makes the linkage mechanism 100 on both sides move synchronously, more specifically, makes the real drive link 100d (which is equipped with the drive motor 800 ) of the linkage mechanism 100 on the left side and the linkage mechanism 100d on the right side. The "drive link" 100d of the rod mechanism 100 (which is not equipped with a drive motor 800) moves synchronously.

Referring to FIG. 8 to FIG. 9 , the leg rest component 200 includes a leg rest base 210 and leg rest panels 230 disposed on both sides and the top surface of the leg rest base 210 in a semi-surrounding manner. The leg rest base 210 includes a long straight portion 214 of the base at the front end and a short straight portion 213 of the base at the rear end, the two are connected by the bent portion 212 of the base, and the fastener passes through the top of the leg rest base 210 And the leg rest part 200 or its leg rest base 210 is installed under the front end of the seat basin 500a. The leg support panel 230 is made up of the leg support panel outer plates 231 on both sides and the leg support horizontal plate 240 connected between the leg support panel outer plates 231 . The base sliding groove 211 is disposed on the side wall of the long straight portion 214 of the base, and the leg rest panel 230 can slide along the base sliding groove 211 relative to the leg rest base 210 . For this reason, two base reinforcing plates 220 are clamped on both sides of the base chute 211, and two reinforcing plate screws 221 pass through the first base reinforcing plate 220, the base chute 211, the second base The reinforcing plate 220 is finally fixed on the leg rest panel 230 so that the leg rest panel 230 can slide along the direction of the base slide groove 211 . Referring to Fig. 5, Fig. 9 and Fig. 10, during installation, the second stepped bolt 105b passes through the second elongated groove 102 and is fixed in the installation hole 108 of the connecting rod 100e of the intermediate sliding part under the seat pot 500a, and the front of the leg rest connecting rod The mounting hole 103 is mounted on the outer panel 231 of the leg rest panel through the fastener 107 .

11 to 16, when the seat cushion 500 is at the initial adjustment position of the lowest point, the free end of the driving link 100d is at its lowest point, and the first stepped bolt 105a is at the far right of the first elongated groove 106, The length of the leg rest link 100 c protruding forward from the seat cushion is the shortest, so that the leg rest member 200 hangs down relative to the seat cushion 500 . After starting the drive motor 800, the drive motor 800 pushes the drive link 100d to rotate counterclockwise, the position of the drive link mounting hole 113 continues to rise, and the first step bolt 105a makes a circular motion around the second synchronous hinge shaft 121 to drive The seat cushion side panel 301 drives the front end of the entire seat cushion 500 to lift. Simultaneously, the first stepped bolt 105a moves forward along the first elongated groove 106, pushing the leg rest connecting rod 100c to protrude forward. 105a moves in the opposite direction, so that the front end of the leg support link 100c of the link mechanism 100 is pushed forward by the first stepped bolt 105a and protrudes forward, and at the same time, it also circles the second stepped bolt 105b with the intermediate sliding part link 100e as the fulcrum Do a clockwise upward and upward rotation motion. During the movement of the leg rest link 100c, the leg rest component 200 is pushed to rotate clockwise around the top of the leg rest base 210 on the seat pan 500a, and the leg rest panel 230 is driven by the link mechanism 100 to move clockwise. The base chute 211 continues to move toward the other end of the base chute 211 , and finally the leg rest component 200 is lifted. When the drive motor 800 stroke ends, the drive link installation hole 113 can be located at the highest point, the first stepped bolt 105a can be located at the leftmost end of the first elongated slot 106, and the second stepped bolt 105b can be located at the end of the second elongated slot 102 At the far right end, the leg rest part 200 can be raised to the highest point, and the seat cushion 500 and the backrest 700 can complete the reclining motion.

In a non-illustrated embodiment, in the transverse direction of the vehicle seat, the drive motor is arranged centrally and can drive the second synchronous hinge shaft 121 in rotation, so that The drive links rotate synchronously. For this purpose, the second synchronous hinge shaft 121 may be provided with a driven gear which meshes with the output gear of the drive motor.

It should be noted that the terminology used herein is for the purpose of describing specific aspects only, and is not used to limit the disclosure. As used herein, the singular forms "a" and "the one" shall include plural forms unless the context clearly dictates otherwise. It will be understood that the terms "comprises" and "comprises" and other similar terms, when used in the application documents, specify the existence of stated operations, elements and/or parts, but do not exclude one or more other operations, elements , the presence or addition of components and/or combinations thereof. As used herein, the term "and/or" includes all arbitrary combinations of one or more of the associated listed items. Like reference numerals denote like elements throughout the description of the drawings.

Thicknesses of elements in the drawings may be exaggerated for clarity. It will also be understood that if an element is referred to as being on, coupled to, or connected to another element, that element may be directly formed on, coupled to, or connected to the other element. Connected thereto, or there may be one or more intervening elements between them. In contrast, if the expressions "directly on," "directly coupled to," and "directly connected to" are used herein, there are no intervening elements present. Other words used to describe the relationship between elements should be interpreted similarly, such as "between" and "directly between", "attached" and "directly attached", "adjacent" and " directly adjacent" and so on.

Terms such as "top", "bottom", "above", "beneath", "above", "underneath", etc. are used herein to describe one element, layer or region relative to another as shown in the figures. Relationships between elements, layers, or regions. It will be understood that these terms are intended to encompass other orientations of the device in addition to the orientation depicted in the figures.

It will be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Thus, a first element could be termed a second element without departing from the teachings of the inventive concept.

It is also conceivable that all exemplary embodiments disclosed here can be combined with one another in any desired way. Finally, it should be pointed out that the above embodiments are only used for understanding the present invention, and do not limit the protection scope of the present invention. For those skilled in the art, modifications can be made on the basis of the above-mentioned embodiments, and these modifications do not depart from the protection scope of the present invention.

Claims

A zero-gravity seat structure, which includes a backrest (700), a seat cushion (500) and a leg rest part (200), the leg rest part is movable relative to the seat cushion, and it is characterized in that the The zero-gravity seat structure also includes a drive motor (800) and a link mechanism (100), the drive motor is configured to synchronously drive the seat cushion and leg rest components through the link mechanism and synchronously drive all the components through the seat cushion. Said backrest.
The zero-gravity seat structure according to claim 1, wherein the upper end of the leg rest is hinged at the front end of the seat cushion.
The zero-gravity seat structure according to claim 1 or 2, characterized in that the bottom of the backrest is hinged to the rear end of the seat cushion through a recliner (600).
The zero-gravity seat structure according to any one of claims 1 to 3, characterized in that, the zero-gravity seat structure further comprises a seat installation part (300), and both the seat cushion and the motor are installed on the seat mount.
The zero-gravity seat structure according to claim 4, characterized in that,

the seat mounting member is supported on a fixed foundation; or

The seat installation part is installed on a pair of slide rails, and the seat installation part is configured to move back and forth along the pair of slide rails carrying the backrest, seat cushion, leg rest part and driving motor.
The zero-gravity seat structure according to any one of claims 1 to 5, wherein the linkage mechanism comprises:

a drive link (100d) rotatably mounted on a first end thereof about a first axis of rotation, the drive motor configured to drive the drive link to rotate about the first axis of rotation;

A seat cushion side plate (301) of the seat cushion, the seat cushion side plate has a first slide groove;

A leg support link (100c), the rear end of the leg support link is hinged to the second end of the drive link opposite to the first end, and the hinge of the leg support link to the drive link Guided in the first chute, the leg rest link has a second chute, the sliding piece protruding from the seat cushion is guided in the second chute, and the front end of the leg rest link is connected to the leg rest component.
The zero-gravity seat structure according to claim 6, characterized in that, the hinged part of the leg support link and the drive link is realized by a first stepped bolt (105a), wherein the first stepped bolt passes through the first Slide slot and drive link mounting hole (113) and screw into leg rest link rear mounting hole (104).
The zero-gravity seat structure according to claim 6 or 7, wherein the sliding member is realized by a connecting rod (100e) fixed to the seat cushion and a second stepped bolt (105b), wherein the second stepped bolt Pass through the second channel and screw into the mounting hole (108) of the connecting rod fixed to the seat cushion.
The zero-gravity seat structure according to any one of claims 6 to 8, characterized in that the front end of the leg rest connecting rod is hinged to the leg rest component through a fastener (107).
According to the zero-gravity seat structure according to any one of claims 6 to 9, it is characterized in that a sector gear is arranged at the first end of the drive link, and the sector gear is connected to the drive motor. The output gear meshes.
The zero-gravity seat structure according to any one of claims 1 to 10, characterized in that, the zero-gravity seat structure comprises a pair of linkage mechanisms, that is, a left linkage mechanism and a right linkage mechanism. A link mechanism, wherein one of a pair of link mechanisms is provided with exactly one drive motor, or each link mechanism is provided with a drive motor, and the two drive motors can operate synchronously.
The zero-gravity seat structure according to claim 4, wherein the link mechanism comprises at least one driving link, at least one cushion sliding part, at least one leg rest link, at least one intermediate sliding part, at least one An intermediate sliding part connecting rod and at least one leg rest sliding part; the seat cushion sliding part is slidably connected with the seat cushion, the leg rest sliding part is slidably connected with the leg rest part, and one end of the driving link is connected with the The power output end of the driving motor is driven and connected, and the other end of the driving link is hinged to the seat cushion sliding part; one end of the leg rest connecting rod is hinged to the seat cushion sliding part, and the leg rest is connected to the seat cushion sliding part. The other end of the rod is hinged to the leg rest sliding part, the leg rest connecting rod is slidably connected to the middle sliding part, one end of the middle sliding part connecting rod is fixedly connected to the seat cushion, and the middle sliding part One end of the connecting rod is hinged with the intermediate sliding part.
The zero-gravity seat structure according to claim 12, wherein the seat mounting part comprises a pair of seat cushion bracket side panels, and the seat cushion comprises a pair of seat cushion side panels and is fixed on a pair of seat cushion The seat basin on the side plate, the rear end of the pair of seat cushion side plates is hinged with the rear end of a pair of seat cushion bracket side plates through a first synchronous hinge shaft; the bottom of the backrest is hinged on the On the rear end of the pair of seat cushion side panels; the drive motor is installed on one of the seat cushion support side panels, and an output gear is keyed on the power output end of the drive motor; one end of the drive link It is hinged on the side plate of the seat cushion support through a second synchronous hinge shaft; a sector gear is arranged at the one end of the drive link, and the sector gear meshes with the output gear.
The zero-gravity seat structure according to claim 12 or 13, wherein the seat cushion sliding part consists of a first long groove arranged on the side plate of the seat cushion and passing through the first long groove. A bar groove and a first stepped bolt that can slide in the first elongated groove is formed, and the other end of the driving link is hinged to one end of the leg support link by the first stepped bolt.
The zero-gravity seat structure according to any one of claims 12 to 14, characterized in that, the middle sliding part consists of a second elongated slot arranged on the leg rest link and passing through the The second elongated groove is formed by a second stepped bolt that can slide in the second elongated groove, one end of the connecting rod of the middle sliding part is fixedly connected with the bidet, and the second stepped bolt is connected to the said seat basin. The other end of the connecting rod of the intermediate sliding part is connected.
The zero-gravity seat structure according to any one of claims 6 to 15, wherein the leg rest component comprises a leg rest base and a leg rest sliding part, and the upper end of the leg rest base is hinged On the front side of the sitting basin; the leg rest sliding part is a leg rest panel, the leg rest panel is slidably arranged on the leg rest base, and the other end of the leg rest connecting rod is hinged on the on the leg rest panel.
The zero-gravity seat structure according to any one of claims 1 to 16, wherein the zero-gravity seat structure is configured to switch between an initial position and a final position, and in the initial position, the The seat cushion extends substantially horizontally, the leg rest member extends downwardly from the seat cushion, in the final position, the front end of the seat cushion is lifted upwards by the linkage mechanism, the leg rest member is lifted by the linkage mechanism Stretched forwards and lifted upwards, the backrest is carried along by the seat cushion and is therefore correspondingly angled rearwards so that the zero-gravity seat structure is in a zero-gravity position.