CN111642922B

CN111642922B - Adjustable seat bracket

Info

Publication number: CN111642922B
Application number: CN202010507964.0A
Authority: CN
Inventors: 李晓鸿; 傅豪; 钱威
Original assignee: Ruimai Technology Co ltd
Current assignee: Ruimai Technology Co ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2025-02-14
Anticipated expiration: 2040-06-05
Also published as: CN111642922A

Abstract

The invention relates to an adjustable seat support, which comprises a backrest support, a seat support and a leg support which are sequentially connected, wherein the seat support comprises a seat frame, a seat interlocking frame, a seat connecting rod assembly, a fixed seat and a gravity adjusting device, one end of the seat interlocking frame is connected with the leg support, the other end of the seat interlocking frame is rotationally connected with the seat frame through the seat connecting rod assembly, one end of the fixed seat is rotationally connected with the seat interlocking frame, the other end of the fixed seat is connected with a seat base, the gravity adjusting device comprises a gravity driving piece and a driving connecting piece, one end of the gravity driving piece is hinged with the fixed seat, the other end of the gravity driving piece is connected with the driving connecting piece, the driving connecting piece is connected with the seat interlocking frame, and the gravity adjusting device is used for adjusting the seat support to a ground clearance height of the highest point of the leg support to be greater than the ground clearance height of the highest point of the backrest support. The seat support can be adjusted to a zero gravity posture, so that the body pressure is in the buttocks, the blood circulation pressure is reduced, and the use comfort is improved.

Description

Adjustable seat support

Technical Field

The invention relates to the technical field of multifunctional sofa seats, in particular to an adjustable seat support.

Background

With the continuous improvement of economic life, multifunctional seats are becoming more and more popular in daily life. Sofa in home, lounge chairs, seats in theatres, seats in transportation, office chairs, etc. As people pay more attention to physical and mental health, the requirements on the health care of the seat are also higher. Office leisure chairs in the prior art are generally adjusted to include sitting, extended and lying positions. The sitting position is a standard folded position, the seat is the most primitive state, people can sit down normally in daily life, the seat is in a generally horizontal orientation, the backrest is arranged to be basically vertical, and the extending position is that the legs extend to the front of the seat, the backrest is kept to be enough vertical, or the backrest extends backwards, so that the leisure of office gaps of the user is allowed. And a recumbent position with the legs extending forward of the seat and the backrest positioned rearward from the extended position in obtuse relationship with the seat for rest or sleep.

However, the prior art seat is limited by the structure of the extending posture, when the extending posture is adjusted to the lying posture, the legs are far lower than the back rest, and when the user lies in the lying posture, the user still has the feeling that the gravity center slides downwards, and the waist and back pain can be caused by the fact that the user lies on the seat for a long time at the back position.

Disclosure of Invention

In order to solve the technical problems, the invention provides the adjustable seat support, and the seat support is further adjusted in corresponding height and angle through the gravity adjusting device when in lying position, so that the final human shank position is higher than or at the same level with the heart, and the purposes of improving blood circulation, relieving pain in waist and back and relieving fatigue are achieved. Solves the technical problems of single function and poor comfort of the common office leisure chair in the prior art when lying.

The technical effects of the invention are realized by the following steps:

the invention provides an adjustable seat support, which comprises a backrest support, a seat support and leg supports which are sequentially connected, wherein the seat support comprises a seat frame, a seat linkage frame, a seat connecting rod assembly, a fixed seat and a gravity adjusting device;

One end of the seat frame is connected with the backrest bracket, the other end of the seat frame is connected with the leg bracket, one end of the seat interlocking frame is used for being connected with the leg bracket, the other end of the seat frame is rotationally connected with the seat frame through a seat connecting rod assembly, one end of the fixing seat is rotationally connected with the seat interlocking frame, and the other end of the fixing seat is used for being connected with the seat base;

The gravity adjusting device comprises a gravity driving piece and a driving connecting piece, one end of the gravity driving piece is connected with the fixed seat, the other end of the gravity driving piece is connected with the driving connecting piece, the driving connecting piece is connected with the seat base linkage frame, the gravity driving piece is used for driving the seat base linkage frame and the seat frame to rotate relative to the fixed seat, and when the seat support is adjusted to be in a zero gravity posture from a lying posture, the gravity adjusting device adjusts the seat support to be higher than the ground clearance of the highest point of the backrest support.

Further, the chair seat linkage frame is a U-shaped frame, two connecting parts are symmetrically arranged at the opening end of the U-shaped frame, each connecting part is used for being connected with the chair seat connecting rod assembly, one end of the chair seat connecting rod assembly is rotationally connected with the connecting part, and the other end of the chair seat connecting rod assembly is rotationally connected with the rear frame of the seat frame.

Further, the fixing base comprises a fixing portion and two connecting side plates symmetrically arranged on two sides of the fixing portion, the fixing base is rotationally connected with the connecting portion through the connecting side plates, and the fixing portion is used for being connected with the seat base.

Further, the gravity driving piece comprises a first motor and a first push rod, the first motor is used for driving the first push rod, the first motor is hinged to the fixing seat, the first push rod is connected with the driving connecting piece, and the driving connecting piece is connected with the front frame of the seat interlocking frame.

Further, a mounting connecting rod is arranged on the seat frame, one end of the mounting connecting rod is connected with the front frame of the seat frame, and the other end of the mounting connecting rod is connected with the rear frame of the seat frame.

Further, the seat support also comprises a back adjusting device, the back adjusting device is used for connecting and adjusting the backrest support, the back adjusting device comprises a second motor and a second push rod, the second motor is rotationally connected with the mounting connecting rod of the seat frame, and the second push rod is rotationally connected with the backrest support.

Further, the seat support also comprises a leg adjusting device, the leg adjusting device is used for connecting and adjusting the leg support, the leg adjusting device comprises a third motor and a third push rod, the third motor is rotationally connected with the front frame of the seat interlocking frame through a mounting piece, and the third push rod is connected with one end of the mounting connecting rod, which is close to the rear frame of the seat frame.

Further, a support frame is further arranged at one end, far away from the backrest support, of the seat interlocking frame, two sides of the support frame are respectively fixed at two side edges of the seat interlocking frame, and the support frame is used for fixing the driving connecting piece.

Further, the seat support can be adjusted to a sitting posture, an extending posture, a lying posture and a zero gravity posture, the seat support is adjusted to a first adjusting stage from the sitting posture to the extending posture, a second adjusting stage from the extending posture to the lying posture, a third adjusting stage from the lying posture to the zero gravity posture, and the maximum angle change amount of the seat interlocking frame in the third adjusting stage is not smaller than 10 degrees, wherein the height difference between the highest point of the leg support and the highest point of the backrest support is 100-260mm.

Further, the seat support further comprises two leg connecting rod groups which are symmetrically arranged, each leg connecting rod group comprises at least three connecting rods, and two ends of each connecting rod are respectively and rotatably connected with the seat interlocking frame and the leg support.

As described above, the invention has the following beneficial effects:

(1) According to the invention, the angle and the height of corresponding parts of the seat support are further adjusted under the lying state that the back of the leg part extends through the gravity adjusting device, so that the seat support can reach the zero gravity posture, and the seat support is provided with the fixing seat, and when the seat support is adjusted to the zero gravity posture, the seat interlocking frame and the seat frame of the seat support rotate upwards around the connection point of the seat connecting rod assembly and the fixing seat, so that the stability of the seat support is ensured.

(2) The zero gravity posture of the invention ensures that the shank body position of the human body is higher than or at the same level with the heart, the blood circulation pressure is reduced to the minimum, and the body pressure is at the buttocks, thereby greatly relieving the intervertebral disc pressure and the tension of the lumbar muscle under the standing and ordinary sitting postures, and achieving the purposes of improving the blood circulation, relieving the pain of the lumbar and the back and relaxing the mind and body.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the following description will make a brief introduction to the drawings used in the description of the embodiments or the prior art. It should be apparent that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained from these drawings without inventive effort to those of ordinary skill in the art.

FIG. 1 is a schematic view of a seat support according to an embodiment of the present invention;

FIG. 2 is a schematic view of a gravity adjusting device according to an embodiment of the present invention;

FIG. 3 is a schematic view of a connection structure between a fixing base and a supporting frame according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a fixing base according to an embodiment of the present invention;

FIG. 5 is a schematic view of a seat link assembly according to an embodiment of the present invention;

FIG. 6 is a schematic view of the back and leg adjustment mechanism of the present invention;

FIG. 7 is a schematic view of the position of the armrest support of the seat support of the present invention;

FIG. 8 is a schematic view of the seat support of the present invention in a normal reclined position;

fig. 9 is a schematic view of the structure of the seat support of the present invention in a zero gravity position.

The reference numerals in the drawings correspond to a 1-backrest bracket, a 2-seat bracket, a 3-leg bracket, a 21-seat frame, a 22-seat linkage frame, a 221-connecting part, a 23-gravity adjusting device, a 24-seat connecting rod assembly, a 241-first connecting rod, a 242-second connecting rod, a 243-fixed connecting piece, a 4-fixed seat, a 41-fixed part, a 42-connecting side plate, a 230-gravity driving piece, a 231-first motor, a 232-first push rod, a 233-driving connecting piece, a 211-mounting connecting rod, a 5-back adjusting device, a 51-second motor, a 52-second push rod, a 6-leg adjusting device, a 61-third motor, a 62-third push rod, a 63-mounting piece, a 7-support frame, an 8-leg connecting rod group, a 81-third connecting rod, a 82-fourth connecting rod, a 83-fifth connecting rod, a 9-seat base and a 10-armrest bracket.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may include one or more of the feature, either explicitly or implicitly. Moreover, the terms "first," "second," and the like, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein.

It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

The seat support can be adjusted to a sitting position, an extended position, a lying position and a zero gravity position, the seat support is adjusted from the sitting position to the extended position to be a first adjustment stage, from the extended position to the lying position to be a second adjustment stage, and from the lying position to be a zero gravity position to be a third adjustment stage.

Example 1:

as shown in fig. 1-3, an adjustable seat support according to an embodiment of the present invention includes a backrest support 1, a seat support 2 and a leg support 3 connected in sequence, wherein the seat support 2 includes a seat frame 21, a seat linkage frame 22, a seat link assembly 24, a fixing base 4 and a gravity adjusting device 23;

One end of the seat frame 21 is connected with the backrest bracket 1, and the other end is connected with the leg bracket 3. In the embodiment of the present invention, the side of the seat frame 21 connected to the backrest bracket 1 is a rear frame, and the end of the seat frame 21 connected to the leg bracket 3 is a front frame. One end of the seat interlocking frame 22 is used for being connected with the leg support 3, the other end of the seat interlocking frame is rotationally connected with the seat frame 21 through a seat connecting rod assembly 24, one end of the fixed seat 4 is rotationally connected with the seat interlocking frame 22, and the other end of the fixed seat 4 is used for being connected with the seat base 9;

The gravity adjusting device 23 includes a gravity driving member 230 and a driving connecting member 233, wherein one end of the gravity driving member 230 is connected with the fixing base 4, and the other end is connected with the driving connecting member 233. Preferably, the gravity driving piece 230 is hinged with the fixing base 4. The driving connection piece 233 is connected with the seat linking frame 22, the gravity driving piece 230 is used for driving the seat linking frame 22 and the seat frame 21 to rotate relative to the fixed seat 4, when the seat support is adjusted from the lying posture to the zero gravity posture, the gravity adjusting device 23 adjusts the seat support to a height above the ground of the highest point of the leg support 3, which is greater than the height above the ground of the highest point of the backrest support 1. Preferably, in this embodiment, the height difference between the highest point of the leg rest 3 and the highest point of the backrest rest 1 is 100-260mm, preferably, the leg rest 3 is 100mm, 180mm, 200mm, 252mm or 260mm higher than the backrest rest, in this embodiment, the ground-off height of the leg rest is 652mm, and the ground-off height of the backrest rest is 400mm. Too high legs can also cause too low head for zero gravity pose affecting comfort and seat stability.

Preferably, in the embodiment of the present invention, the seat interlocking frame 22 is a U-shaped frame, and two connection portions 221 are symmetrically disposed at an opening end of the U-shaped frame, and each connection portion 221 is used for connecting with the seat link assembly 24. Preferably, in some embodiments, the connection portion 221 may be a connection member such as a connection plate, a connection piece, or a connection rod, and a support member may be further disposed between the two connection portions 221 for stable connection. One end of the seat link assembly 24 is rotatably connected to the connecting portion 221, and the other end of the seat link assembly 24 is rotatably connected to the rear frame of the seat frame 21. In some embodiments, as shown in fig. 5, the seat link assembly 24 includes a first link 241 and a second link 242, wherein one end of the first link 241 and one end of the second link 242 are rotatably connected to the connecting portion 221, and the other end is rotatably connected to the rear frame of the seat frame 21 through a fixed connection 243.

Specifically, as shown in fig. 4, the fixing base 4 includes a fixing portion 41 and two connecting side plates 42 symmetrically disposed on two sides of the fixing portion 41, the fixing base 4 is rotatably connected with the connecting portion 221 of the seat interlocking frame 22 through the connecting side plates 42, and the fixing portion 41 is used for being connected with the seat base 9. Preferably, the two connecting side plates 42 are symmetrically disposed at the outer sides of the two connecting portions 221 and rotatably connected by a rotation shaft or other rotation connecting member. The fixing portion 41 is provided with an assembly hole to be connected to the support rod of the seat base 9.

Specifically, as shown in fig. 2, the gravity driving member 230 includes a first motor 231 and a first push rod 232, the first motor 231 is configured to drive the first push rod 232, the first motor 231 is hinged to the fixing base 4, the first push rod 232 is connected to the driving connecting member 233, and the driving connecting member 233 is connected to the front frame of the seat interlocking frame 22. Specifically, when the seat support is adjusted from the lying posture to the zero gravity posture, the first motor 231 drives the first push rod 232 to linearly move forward, and the first push rod 232 pushes the front frame of the seat interlocking frame 22 through the driving connection piece 233, so that the connection point of the seat interlocking frame 22 and the fixed seat 4 is rotated upwards as the center of a circle.

Specifically, as shown in fig. 6, the seat frame 21 is provided with a mounting link 211, one end of the mounting link 211 is connected to the front frame of the seat frame 21, and the other end of the mounting link 211 is connected to the rear frame of the seat frame 21.

Specifically, the seat support further comprises a back adjusting device 5, the back adjusting device 5 is used for connecting and adjusting the backrest support 1, the back adjusting device 5 comprises a second motor 51 and a second push rod 52, the second motor 51 is rotatably connected with the mounting connecting rod 211 of the seat frame 21, and the second push rod 52 is rotatably connected with the backrest support 1.

Specifically, when the seat support is adjusted to the zero gravity posture, the angle of the back support 1 to the seat frame 21 is 110 ° -130 °, the angle of the back support 1 to the ground is 20 ° -30 °, and the angle of the leg support to the ground is 20 ° -25 °. In some embodiments, the angle between the backrest support 1 and the seat frame 21 may be 110 °, 118 °, 120 °, 125 °, 130 °, or the like, the angle between the backrest support 1 and the ground may be 20 °, 25 °, 26 °, 28 °, or 30 °, and the angle between the leg support and the ground may be 20 °, 23 °, or 25 °. Preferably, in the embodiment of the present invention, when the seat support is adjusted to the zero gravity posture, the angle of the back support 1 to the seat frame 21 is 120 °, the angle of the back support 1 to the ground is 26 °, and the angle of the leg support to the ground is 23 °.

Specifically, the seat support further includes a leg adjusting device 6, the leg adjusting device 6 is used for connecting and adjusting the leg support 3, the leg adjusting device 6 includes a third motor 61 and a third push rod 62, the third motor 61 is rotatably connected with the front frame of the seat interlocking frame 22 through a mounting piece 63, and the third push rod 62 is connected with one end of the mounting connecting rod 211, which is close to the rear frame of the seat frame 21.

Specifically, a supporting frame 7 is further disposed at an end of the seat interlocking frame 22 away from the backrest bracket 1, two sides of the supporting frame 7 are respectively fixed to two side edges of the seat interlocking frame 22, and the supporting frame is used for fixing the driving connection member 233. Specifically, the driving connection member 233 is obliquely disposed on the support frame 7 and the seat interlocking frame 22.

The maximum angle change of the seat linkage 22 in the third adjustment stage is not less than 10 °. Preferably, in some embodiments, the angle of upward rotation of the seat interlocking frame 22 and the seat frame 21 driven by the gravity driving device may be 10 °, 15 ° or 18 °, etc., and preferably, the angle of upward rotation of the seat interlocking frame 22 in the third adjustment stage is 15 °.

Specifically, as shown in fig. 5, the seat support further includes two leg link groups 8 symmetrically disposed, each leg link group 8 includes at least three links, and two ends of each link are respectively rotatably connected to the seat interlocking frame 22 and the leg support 3. In the embodiment of the present invention, the leg link set 8 includes a third link 81, a fourth link 82, and a fifth link 83, wherein the third link 81 is connected to the seat interlocking frame 22, one end of the fourth link 82 is connected to the third link 81, the other end is connected to the leg support 3 and the seat frame 21, one end of the fifth link 83 is connected to the third link 81, the other end is connected to the leg support 3, and the leg link set 8 is used for expanding and retracting the leg support 3.

As shown in fig. 7, the seat support of the present invention further comprises an armrest support 10, the armrest support 10 is fixed at two ends of the seat frame 21, and further comprises an electric control switch, the electric control switch is fixed at one side of the support frame 7, and the electric control switch is electrically connected with the gravity adjusting device 23, the back adjusting device 5 and the leg adjusting device 6, and can control the seat support to realize various postures through the electric control switch.

The invention can adjust the seat support, the sitting posture is the initial posture, the back support of the seat support can be controlled to be unfolded in the first adjusting stage to enable the back to be stretched backwards to the stretching posture, the second adjusting stage can be used for controlling the leg support of the seat support to be unfolded to achieve the lying posture state that the legs and the back are unfolded, the third adjusting stage can be used for further controlling the seat support to rotate upwards to achieve the zero gravity posture that the ground clearance height of the leg support is larger than that of the back support, as shown in fig. 8. Wherein, several postures can be independently controlled to keep one posture, can also be controlled in a linkage way and converted into different postures, for example, the lying posture can be independently controlled to be realized, and then the lying posture is adjusted to be a zero gravity posture, and can also be directly adjusted to be a zero gravity posture.

According to the invention, the angle and the height of corresponding parts of the seat support are further adjusted under the lying state that the back of the leg part extends through the gravity adjusting device, so that the seat support can reach the zero gravity posture, and the seat support is provided with the fixing seat, and when the seat support is adjusted to the zero gravity posture, the seat interlocking frame and the seat frame of the seat support rotate upwards around the connection point of the seat connecting rod assembly and the fixing seat, so that the stability of the seat support is ensured. The zero gravity posture of the invention ensures that the shank body position of the human body is higher than or at the same level with the heart, the blood circulation pressure is reduced to the minimum, and the body pressure is at the buttocks, thereby greatly relieving the intervertebral disc pressure and the tension of the lumbar muscle under the standing and ordinary sitting postures, and achieving the purposes of improving the blood circulation, relieving the pain of the lumbar and the back and relaxing the mind and body.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.

Claims

1. An adjustable chair bracket, characterized in that it comprises a backrest bracket (1), a seat bracket (2) and a leg bracket (3) which are connected in sequence, wherein the seat bracket (2) comprises a seat frame (21), a seat linkage frame (22), a seat connecting rod assembly (24), a fixed seat (4) and a gravity adjustment device (23);

One end of the seat frame (21) is connected to the backrest bracket (1), and the other end is connected to the leg bracket (3); one end of the seat linkage frame (22) is used to be connected to the leg bracket (3), and the other end is rotatably connected to the seat frame (21) through a seat connecting rod assembly (24); one end of the fixed seat (4) is rotatably connected to the seat linkage frame (22), and the other end is used to be connected to the seat base (9);

The seat linkage frame (22) is a U-shaped frame, and the open end of the U-shaped frame is symmetrically provided with two connecting parts (221), each of the connecting parts (221) is used to connect to the seat connecting rod assembly (24); the seat connecting rod assembly (24) comprises a first connecting rod (241) and a second connecting rod (242), one end of the first connecting rod (241) and the second connecting rod (242) are rotatably connected to the connecting part (221), and the other end is rotatably connected to the rear frame of the seat frame (21) through a fixed connecting piece (243);

The gravity adjustment device (23) comprises a gravity driving member (230) and a driving connecting member (233), one end of the gravity driving member (230) is connected to the fixed seat (4), and the other end is connected to the driving connecting member (233), the driving connecting member (233) is connected to the seat linkage frame (22), the gravity driving member (230) is used to drive the seat linkage frame (22) and the seat frame (21) to rotate relative to the fixed seat (4), when the seat support is adjusted from a lying position to a zero gravity position, the gravity adjustment device (23) adjusts the seat support to a height of the highest point of the leg support (3) above the ground that is greater than the height of the highest point of the backrest support (1) above the ground;

The gravity drive member (230) comprises a first motor (231) and a first push rod (232), wherein the first motor (231) is used to drive the first push rod (232), the first motor (231) is hinged to the fixed seat (4), the first push rod (232) is connected to the drive connecting member (233), and the drive connecting member (233) is connected to the front frame of the seat linkage frame (22).

2. An adjustable seat bracket according to claim 1, characterized in that the fixed seat (4) comprises a fixed portion (41) and two connecting side panels (42) symmetrically arranged on both sides of the fixed portion (41), the fixed seat (4) is rotatably connected to the connecting portion (221) through the connecting side panels (42), and the fixed portion (41) is used to be connected to the seat base (9).

3. An adjustable seat bracket according to claim 1, characterized in that a mounting rod (211) is provided on the seat frame (21), one end of the mounting rod (211) is connected to the front frame of the seat frame (21), and the other end of the mounting rod (211) is connected to the rear frame of the seat frame (21).

4. An adjustable seat bracket according to claim 1, characterized in that the seat bracket also includes a back adjustment device (5), the back adjustment device (5) is used to connect and adjust the backrest bracket (1), the back adjustment device (5) includes a second motor (51) and a second push rod (52), the second motor (51) is rotatably connected to the mounting connecting rod (211) of the seat frame (21), and the second push rod (52) is rotatably connected to the backrest bracket (1).

5. An adjustable seat bracket according to claim 3, characterized in that the seat bracket also includes a leg adjustment device (6), the leg adjustment device (6) is used to connect and adjust the leg bracket (3), the leg adjustment device (6) includes a third motor (61) and a third push rod (62), the third motor (61) is rotatably connected to the front frame of the seat linkage frame (22) through a mounting member (63), and the third push rod (62) is connected to one end of the mounting connecting rod (211) close to the rear frame of the seat frame (21).

6. An adjustable chair bracket according to claim 1, characterized in that a support frame (7) is further provided at one end of the seat linkage frame (22) away from the backrest bracket (1), and two sides of the support frame (7) are respectively fixed to two side edges of the seat linkage frame (22), and the support frame is used to fix the driving connecting member (233).

7. An adjustable seat bracket according to claim 1, characterized in that the seat bracket can be adjusted to a sitting position, a stretched position, a lying position and a zero-gravity position, the seat bracket is adjusted from a sitting position to the stretched position as a first adjustment stage, from the stretched position to a lying position as a second adjustment stage, and from the lying position to a zero-gravity position as a third adjustment stage, the maximum angle change of the seat linkage frame (22) in the third adjustment stage is not less than 10°, at which time the height difference between the highest point of the leg bracket (3) and the highest point of the backrest bracket (1) is 100-260mm.

8. An adjustable seat bracket according to claim 1, characterized in that the seat bracket also includes two symmetrically arranged leg connecting rod groups (8), each of the leg connecting rod groups (8) includes at least three connecting rods, and the two ends of at least three of the connecting rods are respectively rotatably connected to the seat linkage frame (22) and the leg bracket (3).