Multi-posture adjustable seat framework

Abstract

The invention relates to a multi-posture adjustable seat framework which comprises a bottom frame, a front-back moving framework module is connected to the bottom frame, a height-adjustable cushion framework module is connected to the upper portion of the front-back moving framework module, a backrest framework module is connected to the upper portion of the side end of the front-back moving framework module, and the height-adjustable cushion framework module comprises a front height adjusting connecting rod and a rear height adjusting connecting rod. The other end of the front height adjusting connecting rod and the other end of the rear height adjusting connecting rod are hinged to cushion side plates respectively, the cushion side plates are arranged in a bilateral symmetry mode, a seat basin is fixedly connected to the middle of the cushion side plates, a transverse square pipe is arranged below the seat basin, a height adjusting motor assembly is arranged on the transverse square pipe, and the height adjusting motor assembly is composed of a height adjusting motor body, a screw and a telescopic pipe. The front-back moving framework module, the front height adjusting connecting rod, the rear height adjusting connecting rod and the seat cushion side plate jointly form a plane connecting rod mechanism, and under pushing of the height adjusting motor assembly, after the height-adjustable seat cushion framework module moves forwards, the backrest framework module can be overturned all the time till the back face of the backrest framework module is in a horizontal state.

Description

Technical Field

[0001] The invention relates to the technical field of manufacturing automobile parts, in particular to a multi-posture adjustable seat frame. Background Art

[0002] With the development of society and the improvement of people's economic level, the popularity of cars is getting higher and higher. As a large-scale means of transportation, cars are composed of many parts, and car seats are one of them. The main function of car seats is to improve the comfort and safety of drivers or passengers, and the keel of car seats provides safe and stable support for the entire seat, and is accompanied by functions such as forward and backward movement and flipping.

[0003] Chinese Patent Publication (Announcement) No.: CN109910695A, Patent Title: A Foldable Car Seat, which describes the technical problem in the prior art that "

[0002] there is no car seat on the market that can be flipped and folded flat for the passenger seat, and for vehicles that need to carry cargo, the space for the passenger seat cannot be used."

[0004] Chinese Patent Publication (Announcement) No.: CN117124944A, Patent Title: A seat-back linkage mechanism for an automobile, which discloses "

[0006] A seat-back linkage mechanism for an automobile, comprising a symmetrically arranged driving link connected to a backrest frame, a linkage lever connected to the driving link, a lifting link connected to the linkage lever, and a support plate arranged between the two lifting links for supporting a seat cushion, wherein the other end of the lifting link is rotatably connected to the seat cushion frame, and when the backrest rotates backward, the driving lever moves downward and then drives the linkage lever, and the linkage lever pushes the lifting link upward, and the rear part of the seat cushion is lifted and raised as the backrest rotates backward." The technical effect of "

[0015] 1. A seat-back linkage mechanism for an automobile of the present invention, wherein the seat cushion is linked to the backrest, greatly reducing the height difference between the seat cushion and the backrest after the backrest is laid flat, and the backrest break can be controlled within 20 mm, thereby significantly improving the riding comfort of the occupants" is achieved.

[0005] However, it can be seen from the attached figure that if the backrest is flipped forward to the lowest limit, there is still a certain angle between the back of the entire backrest frame and the horizontal line (refer to the attached figure). Figure 6 ). If the car seat can be completely horizontal after being flipped over, a flat plate can be placed on it to place cups, drinks, etc., and liquid will not overflow due to tilting, which can further broaden the application functions in the narrow space of the car, so it needs to be improved. Summary of the invention

[0006] The object of the present invention is to provide a multi-posture adjustable seat frame to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical measures: a multi-posture adjustable seat frame, including a base frame fixedly connected to a car body, a front and rear movable frame module connected to the base frame through a movable component, a height-adjustable seat cushion frame module connected above the front and rear movable frame module, and a backrest frame module connected above the side end of the front and rear movable frame module, characterized in that: the height-adjustable seat cushion frame module includes a front high-adjustment connecting rod and a rear high-adjustment connecting rod connected to the front and rear movable frame module, and the other ends of the front high-adjustment connecting rod and the rear high-adjustment connecting rod are respectively hinged to the height-adjustable The cushion side panels of the cushion frame module are symmetrically arranged on the left and right, and a seat basin is fixedly connected in the middle. The four components of the front-rear movable frame module, the front high-profile connecting rod, the rear high-profile connecting rod and the cushion side panels together form a planar connecting rod mechanism; a horizontal square tube is arranged under the seat basin, and a high-profile motor assembly serving as a power source for the planar connecting rod mechanism is arranged on the horizontal square tube. The high-profile motor assembly consists of a high-profile motor body, a screw and a telescopic tube. The high-profile motor body is fixedly installed on the horizontal square tube, one end of the screw is connected to the high-profile motor body, and the other end of the screw is hinged to the rear high-profile connecting rod.

[0008] Compared with the prior art, the advantages of the present invention are that the front and rear movable skeleton module, the front high-adjustment connecting rod, the rear high-adjustment connecting rod and the seat cushion side panels together form a planar connecting rod mechanism. Under the drive of the high-adjustment motor assembly, when the height-adjustable seat cushion skeleton module moves forward, the backrest skeleton module can be flipped continuously and can be adjusted to a variety of posture states with different tilt angles according to the user's preference until the back of the back is in a horizontal state.

[0009] This new seat frame structure can be used to place water cups, drinks, etc. after being folded. The liquid in the cups or drinks will not spill due to tilting, further broadening the application functions in the narrow space of the car, enhancing the user experience, and can also be adjusted to a variety of posture states with different tilt angles to meet the needs of different users.

[0010] As an improvement of the present invention, the front-rear movable skeleton module includes a left front-rear movable side panel assembly and a right front-rear movable side panel assembly symmetrically arranged on both sides, the front-rear movable skeleton module includes a front transverse tube, a rear transverse tube and a support tube, the front high-adjustment connecting rod is hinged to the left front-rear movable side panel assembly, and the rear high-adjustment connecting rod is semi-hinged to the rear transverse tube. The purpose of selecting this design: the left front-rear movable side panel assembly and the right front-rear movable side panel assembly serve as the immovable bottom edge of the planar linkage mechanism, the front transverse tube, the rear transverse tube and the support tube are used to connect the front-rear movable side panels on both sides to form a set of rigid seat cushions, and the front high-adjustment connecting rod and the rear high-adjustment connecting rod serve as the two sides of the planar linkage mechanism.

[0011] As an improvement of the present invention, the rear high-adjustable connecting rod includes a telescopic hinge point located in the middle, and a cushion hinge point and a semicircular notch are respectively provided on both sides of the rear high-adjustable connecting rod. The purpose of selecting this design is to allow the rear high-adjustable connecting rod to form a rotatable hinge structure, wherein the telescopic hinge point is used to fix the telescopic tube, and the telescopic tube provides power for the swing of the planar connecting rod mechanism through the high-adjustable motor body and the screw.

[0012] As an improvement of the present invention, the backrest frame module includes a first mounting hole passing through the rear transverse tube, and the backrest frame module includes a second mounting hole passing through the support tube. The purpose of selecting this design is to allow the backrest frame module to be fixedly connected to the front and rear movable frame module through the first mounting hole and the second mounting hole.

[0013] As an improvement of the present invention, the backrest frame module includes a backrest motor as a power source, the backrest motor is connected to a recliner synchronization rod, and electric recliners are arranged at both ends of the recliner synchronization rod. The purpose of selecting this design is that when the backrest motor is working, it can rotate and synchronously drive the recliner synchronization rod to rotate, and the recliner synchronization rod is meshingly connected to the electric recliner, synchronously driving the electric recliner to rotate.

[0014] As an improvement of the present invention, one end of the electric recliner is fixedly connected to the lower backrest plate assembly, and the other end of the electric recliner is fixedly connected to the upper backrest plate assembly. The purpose of selecting this design is: through the rotation of the electric recliner, the upper backrest plate assembly can be rotated around the axis of the electric recliner, wherein the lower backrest plate assembly is fixedly connected to the front-rear movable skeleton module and will not rotate.

[0015] As an improvement of the present invention, the body of the front height adjustment connecting rod is provided with an arc surface. The purpose of selecting this design is to increase the strength of the front height adjustment connecting rod.

[0016] As an improvement of the present invention, one end of the front height adjustment link is provided with an upper hinge hole, and the other end of the front height adjustment link is provided with a lower hinge hole. The purpose of selecting this design is to rotatably connect with the seat cushion side plate of the height adjustable seat cushion frame module through the upper hinge hole, and to rotatably connect with the left side front and rear movable side plate assembly of the front and rear movable frame module through the lower hinge hole.

[0017] As an improvement of the present invention, the forward and backward moving motor can be replaced by a manual crank. The purpose of selecting this design is to replace electric with manual to reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their description are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] In the attached picture: Figure 1 It is a stereoscopic view of the multi-posture adjustable seat frame described in the present invention.

[0020] Figure 2 It is a stereoscopic diagram of the forward and backward movable skeleton module described in the present invention.

[0021] Figure 3 It is a three-dimensional diagram of the backrest frame module described in the present invention.

[0022] Figure 4 It is a three-dimensional diagram of the height-adjustable seat cushion frame module described in the present invention.

[0023] Figure 5 It is a schematic diagram of the installation of the high-profile motor assembly described in the present invention on the back of the bidet.

[0024] FIG. 6 is a perspective view of the backrest upper plate assembly after being flipped over in the prior art described in the present invention.

[0025] FIG. 7 is a three-dimensional view of the backrest upper plate assembly after flipping over in the present embodiment of the present invention.

[0026] Figure 8 It is a three-dimensional schematic diagram of the high-profile motor assembly described in the present invention.

[0027] Fig. 9 This is an exploded view of the high-profile motor assembly described in the present invention.

[0028] Fig.10 It is a stereoscopic diagram of the rear height adjustment connecting rod described in the present invention.

[0029] Fig.11 It is a stereoscopic view of the front height adjustment connecting rod described in the present invention.

[0030] Fig.12 It is a schematic diagram of the planar linkage mechanism described in the present invention.

[0031] Description of the reference numerals: 1. chassis; 2. movable assembly; 3. front and rear movable frame module; 4. height-adjustable seat cushion frame module; 5. backrest frame module; 6. front high-adjustment connecting rod; 7. rear high-adjustment connecting rod; 8. seat cushion side panel; 9. seat basin; 10. front and rear movable motor; 11. horizontal square tube; 12. high-adjustment motor assembly; 13. high-adjustment motor body; 14. screw rod; 15. telescopic tube; 16. left front and rear movable side panel assembly; 17. right front and rear movable side panel assembly; 1 8. Front cross tube; 19. Rear cross tube; 20. Support tube; 21. Telescopic hinge point; 22. Seat hinge point; 23. Semicircular notch; 24. First mounting hole; 25. Second mounting hole; 26. Backrest motor; 27. Recliner synchronization rod; 28. Electric recliner; 29. ​​Backrest lower plate assembly; 30. Backrest upper plate assembly; 31. Arc surface; 32. Upper hinge hole; 33. Lower hinge hole; 34. Rotating rod; 35. Tilt state; 36. Horizontal state. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0033] Example 1 Please refer to Figure 1 -12.

[0034] A multi-posture adjustable seat frame provided in this embodiment includes a base frame 1 fixedly connected to a car body, and a forward and backward movable frame module 3 with a forward and backward moving motor 10 is connected to the base frame 1 through a movable component 2. The movable component 2 is equivalent to a seat slide rail and can move forward and backward. The entire multi-posture adjustable seat frame is fixed on the movable component 2 (the seat slide rail, etc. are existing technologies and will not be described in detail).

[0035] In the embodiments of the present invention, please refer to Figure 1 A height-adjustable seat frame module 4 is connected above the front-rear movable frame module 3 , and a backrest frame module 5 is connected above the right side end of the front-rear movable frame module 3 .

[0036] In the embodiments of the present invention, please refer to Figure 4 The height-adjustable seat cushion frame module 4 includes a front high-adjustable connecting rod 6 and a rear high-adjustable connecting rod 7 connected to the front-rear movable frame module 3. The front high-adjustable connecting rod 6 and the rear high-adjustable connecting rod 7 each have two groups symmetrically arranged. The other ends of the front high-adjustable connecting rod 6 and the rear high-adjustable connecting rod 7 are respectively hinged on the seat cushion side panels 8 of the height-adjustable seat cushion frame module 4. The seat cushion side panels 8 also have two groups symmetrically arranged accordingly. A seat basin 9 is fixedly connected in the middle of the two groups of seat cushion side panels 8 to form a complete set of seat cushions.

[0037] In the embodiments of the present invention, please refer to Fig.12 The front and rear movable skeleton module 3, the front high-adjusting connecting rod 6, the rear high-adjusting connecting rod 7 and the cushion side panel 8 together form a planar linkage mechanism. They are hinged to each other to form a four-link planar linkage mechanism that can swing left and right. While swinging left and right, the upper cushion side panel 8 can move left and right and up and down at the same time, forming a compound motion.

[0038] In the embodiments of the present invention, please refer to Figure 5 A horizontal square tube 11 is arranged below the seat basin 9, and a high-profile motor assembly 12 serving as a power source for a planar connecting rod mechanism is arranged on the horizontal square tube 11.

[0039] In the embodiments of the present invention, please refer to Figure 8 and Fig. 9 The high-profile motor assembly 12 is composed of a high-profile motor body 13 , a screw rod 14 and a telescopic tube 15 . The high-profile motor body 13 is fixedly mounted on the horizontal square tube 11 , one end of the screw rod 14 is connected to the high-profile motor body 13 , and the other end of the screw rod 14 is hinged to the rear high-profile connecting rod 7 .

[0040] In the embodiments of the present invention, please refer to Figure 2 The front-rear movable skeleton module 3 includes a left front-rear movable side panel assembly 16 and a right front-rear movable side panel assembly 17 symmetrically arranged on both sides, and the front-rear movable skeleton module 3 includes a front cross tube 18, a rear cross tube 19 and a support tube 20, and the front cross tube 18, the rear cross tube 19 and the support tube 20 are used to connect the front-rear movable side panels on both sides to form a complete set of rigid seat cushions, and the front high-adjustable connecting rod 6 and the rear high-adjustable connecting rod 7 serve as two sides of the planar connecting rod mechanism.

[0041] Furthermore, the front height adjustment link 6 is hinged to the left front and rear movable side plate assembly 16. Figure 2 and Fig.10 The rear high-adjustable connecting rod 7 is semi-hinged with the rear transverse tube 19, that is, the rear high-adjustable connecting rod 7 is provided with a semicircular notch 23, which is tightly attached to the arc surface of the rear transverse tube 19 and can rotate but will not fall out. The left front-to-back movable side plate assembly 16 and the right front-to-back movable side plate assembly 17 can be regarded as the immovable bottom edge of the plane connecting rod mechanism.

[0042] In the embodiments of the present invention, please refer to Fig.10The rear high-adjustment link 7 includes a telescopic hinge point 21 located in the middle, and a cushion hinge point 22 and a semicircular notch 23 are respectively provided on both sides of the rear high-adjustment link 7. The rear high-adjustment link 7 forms a rotatable hinge structure, wherein the telescopic hinge point 21 is used to fix the telescopic tube 15, and the telescopic tube 15 provides the power for the swing of the planar link mechanism through the high-adjustment motor body 13 and the screw rod 14.

[0043] In the embodiments of the present invention, please refer to Figure 3 The backrest frame module 5 includes a first mounting hole 24 passing through the rear transverse tube 19, and the backrest frame module 5 includes a second mounting hole 25 passing through the support tube 20. The backrest frame module 5 is fixedly connected to the front-rear movable frame module 3 through the first mounting hole 24 and the second mounting hole 25.

[0044] Furthermore, the backrest frame module 5 includes a backrest motor 26 as a power source, and the backrest motor 26 is connected to a recliner synchronization rod 27, and electric recliners 28 are arranged at both ends of the recliner synchronization rod 27. When the backrest motor 26 is working, it can rotate and synchronously drive the recliner synchronization rod 27 to rotate. The recliner synchronization rod 27 is meshingly connected with the electric recliner 28, and synchronously drives the electric recliner 28 to rotate. The backrest motor 26 and the electric recliner 28 are prior art and will not be described in detail.

[0045] In the embodiments of the present invention, please refer to Figure 3 One end of the electric recliner 28 is fixedly connected to the backrest lower plate assembly 29, and the other end of the electric recliner 28 is fixedly connected to the backrest upper plate assembly 30. By rotating the electric recliner 28, the backrest upper plate assembly 30 can be rotated around the axis of the electric recliner 28, wherein the backrest lower plate assembly 29 is fixedly connected to the front-rear movable skeleton module 3 and will not rotate, that is, one end is fixed and the other end rotates around the axis of the electric recliner 28, so that the backrest can be flipped.

[0046] In the embodiments of the present invention, please refer to Fig.11 The body of the front high-adjusting connecting rod 6 is provided with an arc surface 31 to increase the strength of the front high-adjusting connecting rod 6. The same structure is also applicable to Fig.10 The rear high-profile link 7.

[0047] In the embodiments of the present invention, please refer to Fig.11 An upper hinge hole 32 is provided at one end of the front height adjustment link 6, and a lower hinge hole 33 is provided at the other end of the front height adjustment link 6. The upper hinge hole 32 is rotatably connected to the seat cushion side plate 8 of the height adjustable seat cushion frame module 4, and the lower hinge hole 33 is rotatably connected to the left side front and rear movable side plate assembly 16 of the front and rear movable frame module 3.

[0048] The front-rear moving motor 10 and the backrest motor 26 can be replaced by a manual crank. Manual operation replaces electric operation, thereby reducing production costs. Using a manual crank to adjust the movement and flipping of the front-rear moving frame module 3 or the backrest frame module 5 is a traditional adjustment method for automobile seats, and its specific structure is not described in detail here.

[0049] The present embodiment provides a multi-posture adjustable seat frame, which are connected as follows: a base frame 1 is fixed on a car body, a forward and backward moving motor 10 is connected to the base frame 1 via a movable component 2 (seat slide rail), a height-adjustable seat cushion frame module 4 is connected above the forward and backward moving frame module 3, and a backrest frame module 5 is connected above the side end (right side end) of the forward and backward moving frame module 3.

[0050] The multi-posture adjustable seat frame provided in this embodiment is used in normal use. By controlling the forward and backward moving motor 10, the rotating rod 34 rotates, and then through the traditional direction-changing devices such as worm gears, the forward and backward moving frame module 3 can be translated to the left or right. By controlling the high-profile motor assembly 12, the height-adjustable cushion frame module 4 can be moved up and down (with left and right movement at the same time). Specifically, the high-profile motor body 13 works to drive the screw 14 to rotate, and the screw 14 is engaged with the thread in the telescopic tube 15, forcibly driving the height-adjustable cushion frame module 4 to move up and down. The backrest frame module 5 is flipped forward or backward by controlling the backrest motor 26.

[0051] The beneficial effects of the present invention are as follows: the front and rear movable frame module 3, the front high-adjusting connecting rod 6, the rear high-adjusting connecting rod 7 and the cushion side plate 8 together form a four-link planar linkage mechanism. Under the push of the high-adjusting motor assembly 12, the height-adjustable cushion frame module 4 can be raised while moving forward, and is at the highest value when in the middle position, so as to achieve the purpose of adjusting the height of the cushion. Furthermore, the height-adjustable cushion frame module 4 continues to move forward, and while lowering the height, the height-adjustable cushion frame module 4 as a whole is translated forward to the front end. At this time, the backrest frame module 5 can be turned over until its back is in a horizontal state 36 (see Figure 7 ), during the entire dynamic process, there will be no interference with the height-adjustable seat cushion frame module 4.

[0052] This new seat frame structure can be used to place water cups, drinks, etc. after being folded horizontally. It will not cause the liquid in the water cups or drinks to overflow due to the flipping of the traditional backrest frame module 5 and the tilted state 35 of its back side. This new seat frame structure further broadens the application function in the narrow space of the car, enhances the user experience, and can also be adjusted to a variety of posture states with different tilt angles to meet the needs of different users.

[0053] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0054] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-posture adjustable seat frame, comprising a base frame (1) fixedly connected to a vehicle body, a forward and backward movable frame module (3) with a forward and backward movable motor (10) connected to the base frame (1) via a movable component (2), a height-adjustable seat cushion frame module (4) connected above the forward and backward movable frame module (3), and a backrest frame module (5) connected above the side end of the forward and backward movable frame module (3), wherein: The height-adjustable seat cushion frame module (4) comprises a front high-adjustable connecting rod (6) and a rear high-adjustable connecting rod (7) connected to the front-rear movable frame module (3); the other ends of the front high-adjustable connecting rod (6) and the rear high-adjustable connecting rod (7) are respectively hinged to the seat cushion side panels (8) of the height-adjustable seat cushion frame module (4); the seat cushion side panels (8) are symmetrically arranged on the left and right, and a seat basin (9) is fixedly connected in the middle thereof; the front-rear movable frame module (3), the front high-adjustable connecting rod (6), the rear high-adjustable connecting rod (7) and the seat cushion side panels (8) together form a flat A plane connecting rod mechanism; a horizontal square tube (11) is arranged below the seat basin (9), and a high-profile motor assembly (12) serving as a power source of the plane connecting rod mechanism is fixedly connected to the horizontal square tube (11), and the high-profile motor assembly (12) is composed of a high-profile motor body (13), a screw rod (14) and a telescopic tube (15); the high-profile motor body (13) is fixedly mounted on the horizontal square tube (11), one end of the screw rod (14) is connected to the high-profile motor body (13), and the other end of the screw rod (14) is hinged to the rear high-profile connecting rod (7).

2. The multi-posture adjustable seat frame according to claim 1 is characterized in that: The front-rear movable skeleton module (3) comprises a left front-rear movable side panel assembly (16) and a right front-rear movable side panel assembly (17) symmetrically arranged on both sides, the front-rear movable skeleton module (3) comprises a front transverse tube (18), a rear transverse tube (19) and a support tube (20), the front high-adjustment connecting rod (6) is hinged to the left front-rear movable side panel assembly (16), and the rear high-adjustment connecting rod (7) is semi-hinged to the rear transverse tube (19).

3. The multi-posture adjustable seat frame according to claim 1 is characterized in that: The rear high-adjustable connecting rod (7) comprises a telescopic hinge point (21) located in the middle, and a seat cushion hinge point (22) and a semicircular notch (23) are respectively arranged on both sides of the rear high-adjustable connecting rod (7).

4. The multi-posture adjustable seat frame according to claim 2 is characterized in that: The backrest frame module (5) comprises a first mounting hole (24) passing through the rear transverse tube (19), and the backrest frame module (5) comprises a second mounting hole (25) passing through the support tube (20).

5. The multi-posture adjustable seat frame according to claim 1 is characterized in that: The backrest frame module (5) comprises a backrest motor (26) as a power source, the backrest motor (26) is connected to a recliner synchronization rod (27), and electric recliners (28) are arranged at both ends of the recliner synchronization rod (27).

6. The multi-posture adjustable seat frame according to claim 5, characterized in that: One end of the electric angle adjuster (28) is fixedly connected to the backrest lower plate assembly (29), and the other end of the electric angle adjuster (28) is fixedly connected to the backrest upper plate assembly (30).

7. The multi-posture adjustable seat frame according to claim 1 is characterized in that: The body of the front height adjustment connecting rod (6) is provided with an arc-shaped curved surface (31).

8. The multi-posture adjustable seat frame according to claim 1, characterized in that: One end of the front high-adjustment connecting rod (6) is provided with an upper hinge hole (32), and the other end of the front high-adjustment connecting rod (6) is provided with a lower hinge hole (33).

9. The multi-posture adjustable seat frame according to any one of claims 1 to 8, characterized in that: The forward and backward moving motor (10) can be replaced by a manual crank.

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