Adjustment system and seat

Abstract

The application provides an adjusting system and a seat. The adjusting system comprises a seat pan and a seat pan frame, the seat pan comprises a front side and a rear side in a length direction; a front lifting assembly connects the seat pan frame with the front side of the seat pan, and the front lifting assembly can lift the front side; a rear lifting assembly connects the seat pan frame with the rear side of the seat pan, and the rear lifting assembly can lift the rear side; the front lifting assembly comprises a first connecting rod part which is rotatably connected to the seat pan frame on one side and rotatably connected to the front side of the seat pan on the other side; and the rear lifting assembly comprises a second connecting rod part which is rotatably connected to the seat pan frame on one side and connected to the rear side of the seat pan through a moving pair and a rotating pair on the other side.

Description

Technical Field

[0001] This application relates to an adjustment system and a seat. Background Technology

[0002] With the evolving needs of car users, in order to provide passengers with a comfortable riding experience, zero-gravity seats and seats with a bed-like mode have emerged. In zero-gravity mode, the seat cushion can be designed with an adjustable tilt angle, allowing passengers to adjust it according to their needs, thus achieving the function of a zero-gravity seat. As for the bed-like mode car seat, it can realize a reclining bed mode within the car cabin. When the user in the cabin needs to lie down and rest, the seat can be reclined, that is, the seat back can be laid down to be almost flush with the seat cushion. At this time, the seat is equivalent to a bed, which is the bed-like mode.

[0003] The inventors discovered that it is difficult to achieve both zero-gravity mode and double-bed mode in current chairs through a simple and compact structure. Utility Model Content

[0004] The purpose of this application is to provide a regulation system.

[0005] Another objective of this application is to provide a seat.

[0006] An adjustment system according to a first aspect of this application includes: a seat and a seat frame, the seat including a front side and a rear side in a length direction; a front lifting assembly, the front side of the seat being connected to the seat frame via the front lifting assembly, the front lifting assembly capable of lifting the front side; and a rear lifting assembly, the rear side of the seat being connected to the seat frame via the rear lifting assembly, the rear lifting assembly capable of lifting the rear side; wherein, the front lifting assembly includes: a first connecting rod portion, the first connecting rod portion being rotatably connected to the seat frame on one side and rotatably connected to the front side of the seat on the other side; the rear lifting assembly includes: a second connecting rod portion, the second connecting rod portion being rotatably connected to the seat frame on one side and connected to the rear side of the seat via a sliding joint and a rotating joint on the other side.

[0007] The technical solution of this application includes a front lifting assembly comprising a first connecting rod, which is rotatably connected to the seat frame on one side and rotatably connected to the front side of the seat on the other side. The rear lifting assembly comprises a second connecting rod, which is rotatably connected to the seat frame on one side and connected to the rear side of the seat on the other side via a sliding joint and a rotating joint. The front and rear lifting share a common sliding joint, realizing the function of the seat having both zero-gravity mode and double bed mode through a simple and compact structure.

[0008] In one or more embodiments of the adjustment system, the first linkage includes a first link, which is rotatably connected to the seat frame via a first hinge, the first link is rotatably connected to the front side of the seat via a second hinge, and the first link is rotatably connected to the output end of the first linear drive via a third hinge.

[0009] In one or more embodiments of the adjustment system, the first linkage includes a first link and a third link disposed on both sides in the width direction. The first linear drive is disposed on one side of the width direction where the first link is located and drives only the first link. The third link is connected to the first link through a second synchronizing rod so that the third link rotates synchronously with the first link.

[0010] In one or more embodiments of the adjustment system, the second linkage includes a second linkage and a slide groove fixedly connected to the second linkage. The rear side of the seat is connected to the slide groove via a pivot, such that the second linkage is connected to the rear side via a sliding joint and a rotating joint. The second linkage is connected to the seat frame via a fourth hinge.

[0011] In one or more embodiments of the adjustment system, the second linkage includes a pair of second linkages arranged on both sides in the width direction, and the second linkages on both sides in the width direction are connected by a first synchronizing rod, and the first synchronizing rod is connected to the sitz bath frame by a fourth hinge.

[0012] In one or more embodiments of the adjustment system, the first synchronizing rod is fixedly connected to a first bracket, the first bracket has the slide groove, the first synchronizing rod is fixedly connected to a second bracket, and the second bracket is rotatably connected to the output end of the second linear drive via a fifth hinge.

[0013] In one or more embodiments of the adjustment system, the first synchronizing rod is provided with a pair of first brackets on both sides of the width direction, and a pair of second brackets are provided. The second linear drive is located in the middle region of the first brackets on both sides of the width direction. The second linear drive is provided on the mounting bracket, the mounting bracket is fixed to the rear horizontal tube, and the rear horizontal tube is rotatably connected to the basin frame on both sides of the width direction.

[0014] In one or more embodiments of the adjustment system, the adjustment system provides a design state, a front-raised state, and a rear-raised state: In the front-raised state, compared to the design state, the first link is driven to rotate about the first hinge, such that the height of the second hinge and the front side is raised, while the second link is locked to maintain a constant height, and the rear side is driven to rotate about the pivot and drive the pivot to move along the slide; In the rear-raised state, compared to the design state, the second link is driven to rotate about the fourth hinge, such that the height of the pivot and the rear side is raised, while the first link is locked to maintain a constant height, and the front side rotates about the first hinge.

[0015] A seat according to a second aspect of this application includes a seat cushion, including an adjustment system as described in the first aspect, and a base frame, the seat cushion frame being directly or indirectly connected to the base frame; and a backrest, rotatably connected to the base frame of the seat cushion.

[0016] In one or more embodiments of the seat, the adjustment system provides a design state, a forward-raised state, and a rearward-raised state: in the design state, the seat is in a design mode and the backrest is in a first position; in the forward-raised state, the seat is in a zero-gravity mode, and relative to the design mode, the backrest is in a second position, the second position being rotated rearward relative to the first position; in the rearward-raised state, the seat is in a double-bed mode, and relative to the design mode, the backrest is in a third position, the third position being rotated rearward relative to the first and second positions, such that the surface of the backrest is substantially flush with the surface of the seat cushion.

[0017] The beneficial effects of the above embodiments include, but are not limited to, the use of the adjustment system described in the first aspect, which enables the seat to achieve both zero-gravity mode and double bed mode functions while maintaining a compact structure. Attached Figure Description

[0018] The above and other features, properties, and advantages of this application will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always denote the same features. It should be noted that these drawings are merely illustrative and are not drawn to scale, and should not be construed as limiting the scope of protection actually claimed by this application, wherein: Figure 1 This is a structural schematic diagram of a seat according to one embodiment.

[0019] Figure 2 This is a schematic diagram of the design state and forward-raised state of a seat adjustment system according to one embodiment.

[0020] Figure 3 This is a schematic diagram of the design state and the rear-raised state of a seat adjustment system according to an embodiment.

[0021] Figure 4 This is a schematic diagram of the structure of an adjustment system according to one embodiment.

[0022] Figure 5 , Figure 6 , Figure 7 This is a schematic diagram of the structure of an adjustment system corresponding to a design state in one embodiment.

[0023] Figure 8 , Figure 9 , Figure 10 This is a schematic diagram of the adjustment system in one embodiment corresponding to the forward-raised state.

[0024] Figure 11 , Figure 12 , Figure 13 This is a schematic diagram of the structure of the adjustment system corresponding to the raised state in one embodiment.

[0025] Figure label: 1000 - Seat, 1001 - Seat cushion, 1002 - Backrest, 10021 - First position, 10022 - Second position, 10023 - Third position; 10 - Adjustment system; 101 - Design state; 102 - Front elevation state; 103 - Rear elevation state; 1-Sit-in basin, 11-Front side, 12-Rear side, 111-Pivot component; 2-Seat cushion frame; 3-Front lifting assembly, 31-First link, 311-First link, 3111-First hinge, 3112-Second hinge, 3113-Third hinge, 313-Third link; 4-Rear lifting assembly, 41-Holiday link, 411-Second link, 412-Slide groove, 413-First bracket, 414-Second bracket, 4111-Fourth hinge, 4112-Fifth hinge; 51-First linear drive unit, 52-Second linear drive unit, 511-Output end of the first linear drive unit, 521-Output end of the second linear drive unit, 53-Mounting bracket; 61-First synchronizing rod, 62-Second synchronizing rod, 63-Rear crossbar.

[0026] 7-Base frame. Detailed Implementation

[0027] Reference will now be made in detail to various embodiments of this application, examples of which are shown in the accompanying drawings and described below. Although this application will be described in conjunction with exemplary embodiments, it should be understood that this specification is not intended to limit this application to those exemplary embodiments. Rather, this application is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents, and other embodiments that may be included within the spirit and scope of this application as defined by the appended claims.

[0028] In the following description, the orientation or positional relationship indicated by the terms "front", "rear" or other directional terms is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] Furthermore, this application uses specific terms to describe its embodiments. For example, "an embodiment" and / or "one embodiment" refers to a particular feature, structure, or characteristic associated with at least one embodiment of this application. Therefore, it should be emphasized and noted that "an embodiment" or "one embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0030] Although the adjustment system disclosed in this application is applicable to car seats, it is not limited thereto. For example, it can be applied to other transportation applications, such as heavy vehicles, railway trains, ships, airplanes, etc. It can also be applied to fixed places, such as massage chairs, meeting rooms, auditoriums, cinemas, office seats, etc. As long as the seat can be adjusted by the adjustment system disclosed in this application.

[0031] refer to Figure 1As shown, in some embodiments, the seat 1000 may include a seat cushion 1001, which includes an adjustment system 10 as described in detail below, and a base frame 7. The seat cushion 1 and the base frame 7 are directly or indirectly connected, for example, they may be directly rotatably connected via a hinge, or indirectly rotatably connected via a linkage and a hinge, or they may be relatively fixedly connected, without limitation. The seat 1000 also includes a backrest 1002, which is rotatably connected to the base frame 7 of the seat cushion. For example, the rotatable connection can be achieved by an adjuster. The meaning of "recliner" is similar to that of general structures in the art. A recliner driven by a motor is generally a stepless adjuster. For the need for quick folding, a high-speed motor should be configured. One side of the core component of the recliner is connected to a movable connector, which is connected to the backrest 1002 to drive the backrest 1002 to rotate. The other side is connected to a fixed connector, which is connected to the base frame 1. The core component of an angle adjuster is similar in meaning to the common understanding in this field; it refers to the part of the angle adjuster that enables locking and unlocking functions and adjusts the angle. The core component generally includes a moving plate and a fixed plate. The moving plate can be connected to a movable connector, and the fixed plate can be connected to a fixed connector. The core component can be connected to different connectors to form different angle adjusters suitable for seats with different structures.

[0032] refer to Figure 2 as well as Figure 3 As shown, in some embodiments, the backrest 1002 of the seat 1000 is connected to the base frame 1 of the seat cushion at a third position 17. The seat 1000 can have different states corresponding to the first state 101 and the second state 102 of the adjustment system 10.

[0033] The adjustment system 10 provides a design state 101, a forward-raised state 102, and a rearward-raised state 103. The specific structures corresponding to these three states will be discussed later. Figures 5 to 13 In detail, in Figure 2 as well as Figure 3 This is just a diagram.

[0034] In design state 101, seat 1000 is in design mode, and backrest 1002 is in the first position 10021. The design state corresponds to the design mode, which is the structure of seat 1000 in a typical occupant usage scenario.

[0035] In the forward-raised state 102, the seat 1000 is in zero-gravity mode. Relative to the design mode, the backrest 1002 is in the second position 10022. The second position 10022 rotates backward relative to the first position 10021, thus providing the function of a zero-gravity seat.

[0036] In the rear-raised position 103, the seat 1000 is in a bed-like mode. Relative to the original design, the backrest 1002 is in a third position 10023. In this third position 10023, the backrest 1002 rotates rearward relative to the first position 10021 and the second position 10022, making the surface of the backrest 1002 substantially flush with the surface of the seat cushion 1001, thus providing the function of the bed-like mode. It should be understood that the surfaces of the backrest 1002 and the seat cushion 1001 refer to the surfaces of the seat after it is filled with foam and fitted with the cover, not the surfaces of the original seat. Figure 1 The surface of the seat back and seat cushion frame shown.

[0037] refer to Figures 4 to 13 As shown, the structure of the adjustment system 10 will be described in detail below.

[0038] The adjustment system 10 includes: a sitz bath 1, a sitz bath frame 2, a front lifting component 3, and a rear lifting component 4.

[0039] The basin 1 includes a front side 11 and a rear side 12 in the length direction. The front side 11 of the basin 1 is connected to the basin frame 2 through a front lifting component 3, which can lift the front side 11. The rear side 12 of the basin 1 is connected to the basin frame 2 through a rear lifting component 4, which can lift the rear side 12.

[0040] The front lifting assembly 3 includes a first link 31, which is rotatably connected to the seat frame 2 on one side and rotatably connected to the front side 11 of the seat 1 on the other side.

[0041] The rear lifting assembly 4 includes a second connecting rod 41, which is rotatably connected to the seat frame 2 on one side and connected to the rear side 12 of the seat 1 on the other side via a sliding joint and a revolute joint. Here, "sliding joint" and "revolute joint" have similar meanings to those commonly used in the art. A revolute joint, also called a slewing joint, allows two components to rotate relative to each other about a common axis. A sliding joint allows relative movement within a plane. If it is in the XY plane, then its movement in the X or Y direction is considered its degree of freedom.

[0042] refer to Figures 4 to 13 As shown, in some embodiments, the specific structure of the first link 31 may include a first link 311, which is rotatably connected to the seat frame 2 via a first hinge 3111, rotatably connected to the front side 11 of the seat 1 via a second hinge 3112, and rotatably connected to the output end 511 of the first linear drive via a third hinge 3113. Such a structure is simple and compact.

[0043] Continue to refer to Figures 4 to 9As shown, in some embodiments, the structure of the first link 31 can also be such that the first link 31 includes a first link 311 and a third link 313 disposed on both sides in the width direction. The first linear drive member 51 is disposed on one side of the width direction where the first link 311 is located, and only drives the first link 311. The third link 313 is connected to the first link 311 through the second synchronizing rod 62, so that the third link 313 rotates synchronously with the first link 311. It can be understood that the first link 311 and the third link 313 are not the same structure, but the third link 313 has a structure similar to that of the first link 311, which is rotatably connected to the seat frame 2 through the first hinge 3111, and the first link 311, which is rotatably connected to the front side 11 of the seat 1 through the second hinge 3112. However, the third link 313 is not connected to the first linear drive member 51, but is driven by the second synchronizing rod 62. This can adapt to the space requirements of the seat interior for the arrangement of the adjustment system.

[0044] refer to Figure 4 , Figure 7 , Figure 10 Especially Figure 12 , Figure 13 As shown, in some embodiments, the structure of the second link 41 may include a second link 411 and a slide groove 412 fixedly connected to the second link 411. The rear side 12 of the seat basin 1 is connected to the slide groove 412 via a pivot 111. The track defined by the slide groove 412 is generally linear. This allows the second link 411 and the rear side 12 to be connected via a sliding joint and a revolute joint. The second link 411 and the seat basin frame 2 are connected via a fourth hinge 4111. Through the structure of the pivot 111 and the slide groove 412, the connection between the second link 411 and the rear side 12 via a sliding joint and a revolute joint is achieved through a simple, compact, and reliable structure.

[0045] Continue to refer to Figure 12 , Figure 13 As shown, the second connecting rod portion 41 includes a pair of second connecting rods 411 arranged on both sides in the width direction. The second connecting rods 411 on both sides in the width direction are connected by a first synchronizing rod 61. The first synchronizing rod 61 is connected to the basin frame 2 by a fourth hinge 4111. The structure of connecting both sides in the width direction by synchronizing rods is relatively stable and reliable.

[0046] Furthermore, the specific structure of the second connecting rod 41 can be as follows: the first synchronizing rod 61 is fixedly connected to the first bracket 413, the first bracket 413 has a sliding groove 412, the first synchronizing rod 61 is fixedly connected to the second bracket 414, and the second bracket 414 is rotatably connected to the output end 521 of the second linear drive member through the fifth hinge 4112. The fixed connection structure can be, for example, welded, or disassembled and connected using bolts, screws, etc., and is not limited to these methods.

[0047] Continue to refer to Figure 12 As shown, the installation position of the second linear drive component 52 can be such that the first synchronizing rod 61 has a pair of first brackets 413 and a pair of second brackets 414 on both sides in the width direction, and the second linear drive component 52 is located in the middle area of ​​the first brackets 413 on both sides in the width direction; the second linear drive component 52 is mounted on a mounting bracket 53, the mounting bracket 53 is fixed to the rear horizontal tube 63, and the rear horizontal tube 63 is rotatably connected to the seat frame 2 on both sides in the width direction. This achieves stable installation of the second linear drive component 52 and makes full use of the space inside the seat cushion, making the adjustment mechanism more compact. Figure 13 In the middle, the structure that runs across the rear 63 is omitted to show the first synchronizing rod 61 more clearly.

[0048] The structure of the first link section 31 and the second link section 41 is not limited to the structure described above. For example, it can also be a link group structure with multiple links, rather than the height adjustment achieved by a single link as shown in the figure. It can be understood that the structure of a single link described above is simpler.

[0049] In the above embodiments, a lead screw motor is used as the linear drive component. The structure of the lead screw motor drives the connecting rod to rotate, which is relatively low-cost and reliable. It is understood that the method of driving the connecting rod to rotate is not limited to a lead screw motor that outputs linear motion. For example, it can be a motor that outputs rotational motion, such as the concept of a "geared motor" commonly used in the art. It can be a brushed motor, a brushless motor, etc. The motor can refer to a standalone motor or a motor assembly consisting of a motor and gears; these are not limitations. Furthermore, the drive component that outputs linear motion is not limited to a lead screw motor; it can be a cylinder, a hydraulic cylinder, an electric cylinder, etc.

[0050] In summary, the regulating system 10 has Figures 5 to 7 Design state 101 shown Figures 8 to 10 The forward elevation state 102 shown, and Figures 11 to 13 The rear-raised state 103 is shown.

[0051] like Figures 5 to 7 As shown, in design state 101, the height of the front side 11 of the seat frame 2 is the first height, and the height of the rear side 12 is the second height. In design state 101, the height is generally unchanged, but different occupants can adjust the first height and the second height of the first state according to the occupant's body posture and then maintain them.

[0052] like Figures 8 to 10As shown, in the raised state 102, compared to the design state 101, the first link 31 is driven to rotate around the first hinge 3111, so that the height of the second hinge 3112 and the front side 11 is raised, while the second link 41 is locked to keep the height unchanged, and the rear side 12 is driven to rotate around the pivot 111 and drive the pivot 111 to move along the slide 412. As described above, this can provide the zero gravity mode of the seat.

[0053] like Figures 11 to 13 As shown, in the rear raised state 103, compared to the design state 101, the second link 41 is driven to rotate around the fourth hinge 4111, so that the height of the pivot 111 and the rear side 12 is raised, and the first link 31 is locked to keep the height unchanged, while the front side 11 rotates around the first hinge 3111. As described above, this can provide a large bed mode for the seat.

[0054] It can be understood that the above-mentioned forward elevation state 102 and rear elevation state 103 can be the endpoints of the adjustment stroke of the adjustment part of the adjustment system. The adjustment system can also be in an intermediate state between the design state 101 and the forward elevation state 102, or an intermediate state between the design state 101 and the rear elevation state 103, and is not limited to this.

[0055] In summary, the beneficial effects of the adjustment system and seat described in the above embodiments include, but are not limited to, the following: the front lifting assembly 3 includes a first connecting rod 31, which is rotatably connected to the seat frame 2 on one side and rotatably connected to the front side 11 of the seat 1 on the other side; the rear lifting assembly 4 includes a second connecting rod 41, which is rotatably connected to the seat frame 2 on one side and connected to the rear side 12 of the seat 1 on the other side via a sliding joint and a rotating joint. The front and rear lifting share a common sliding joint, realizing the function of the seat having both zero-gravity mode and double bed mode through a simple and compact structure.

[0056] While this application discloses preferred embodiments as described above, it is not intended to limit the scope of this application. Any changes and modifications can be made by those skilled in the art without departing from the spirit and scope of this application. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall fall within the protection scope defined by the claims of this application.

Claims

1. A regulating system (10), characterized in that, include: A sitz bath (1) and a sitz bath frame (2), wherein the sitz bath (1) includes a front side (11) and a rear side (12) in the longitudinal direction. The front lifting assembly (3) connects the front side (11) of the basin (1) to the basin frame (2) via the front lifting assembly (3), and the front lifting assembly (3) can lift the front side (11); The rear lifting assembly (4) connects the rear side (12) of the basin (1) to the basin frame (2) and the rear lifting assembly (4) can lift the rear side (12). The front lifting component (3) includes a first connecting rod (31), which is rotatably connected to the sitz basin frame (2) on one side and rotatably connected to the front side (11) of the sitz basin (1) on the other side. The rear lifting assembly (4) includes a second link (41), which is rotatably connected to the sitz bath frame (2) on one side and connected to the rear side (12) of the sitz bath (1) on the other side via a sliding joint and a rotating joint.

2. The regulating system (10) as described in claim 1, characterized in that, The first link (31) includes a first link (311), which is rotatably connected to the sitz basin frame (2) via a first hinge (3111), which is rotatably connected to the front side (11) of the sitz basin (1) via a second hinge (3112), and which is rotatably connected to the output end (511) of the first linear drive via a third hinge (3113).

3. The regulating system (10) as described in claim 2, characterized in that, The first link section (31) includes a first link (311) and a third link (313) disposed on both sides in the width direction. The first linear drive member (51) is disposed on one side of the width direction where the first link (311) is located and drives only the first link (311). The third link (313) is connected to the first link (311) through the second synchronizing rod (62) so that the third link (313) rotates synchronously with the first link (311).

4. The regulating system (10) as described in claim 2, characterized in that, The second link (41) includes a second link (411) and a slide (412) fixedly connected to the second link (411). The rear side (12) of the seat (1) is connected to the slide (412) through a pivot (111), so that the second link (411) and the rear side (12) are connected through a sliding joint and a rotating joint. The second link (411) is connected to the seat frame (2) through a fourth hinge (4111).

5. The regulating system (10) as described in claim 4, characterized in that, The second link (41) includes a pair of second links (411) arranged on both sides of the width direction. The second links (411) on both sides of the width direction are connected by a first synchronizing rod (61). The first synchronizing rod (61) is connected to the basin frame (2) by a fourth hinge (4111).

6. The regulating system (10) as described in claim 5, characterized in that, The first synchronizing rod (61) is fixedly connected to the first bracket (413), and the first bracket (413) has the slide groove (412). The first synchronizing rod (61) is fixedly connected to the second bracket (414), and the second bracket (414) is rotatably connected to the output end (521) of the second linear drive through the fifth hinge (4112).

7. The regulating system (10) as described in claim 6, characterized in that, The first synchronizing rod (61) is provided with a pair of first brackets (413) and a pair of second brackets (414) on both sides of the width direction. The second linear drive (52) is located in the middle area of ​​the first brackets (413) on both sides of the width direction. The second linear drive (52) is provided on the mounting bracket (53), which is fixed to the rear horizontal tube (63). The rear horizontal tube (63) is rotatably connected to the basin frame (2) on both sides of the width direction.

8. The regulating system (10) as described in claim 4, characterized in that, The adjustment system (10) provides a design state (101), a front-raised state (102), and a rear-raised state (103): In the raised state (102), compared to the designed state (101), the first link (31) is driven to rotate around the first hinge (3111), so that the height of the second hinge (3112) and the front side (11) is raised, while the second link (41) is locked to keep the height unchanged, and the rear side (12) is driven to rotate around the pivot (111) and drive the pivot (111) to move along the slide (412); In the rear raised state (103), compared to the design state (101), the second link (41) is driven to rotate around the fourth hinge (4111), so that the height of the pivot (111) and the rear side (12) is raised, and the first link (31) is locked to maintain a constant height, while the front side (11) rotates around the first hinge (3111).

9. A seat (1000), characterized in that, include: A seat cushion (1001) comprising an adjustment system (10) as described in any one of claims 1-8, and a base frame (7), wherein the seat basin (1) is directly or indirectly connected to the base frame (7); and The backrest (1002) is rotatably connected to the base frame (7) of the seat cushion.

10. The seat (1000) as claimed in claim 9, characterized in that, The adjustment system (10) provides a design state (101), a front-raised state (102), and a rear-raised state (103): In the design state (101), the seat (1000) is in the design mode, and the backrest (1002) is in the first position (10021). In the forward-raised state (102), the seat (1000) is in a zero-gravity mode, and relative to the design mode, the backrest (1002) is in a second position (10022), and the second position (10022) is rotated backward relative to the first position (10021); In the rear-raised state (103), the seat (1000) is in the bed mode. Relative to the design mode, the backrest (1002) is in the third position (10023). The third position (10023) is rotated backward relative to the first position (10021) and the second position (10022), so that the surface of the backrest (1002) is substantially flush with the surface of the seat cushion (1001).

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