CN216033956U - Zero-gravity seat framework with lateral avoidance function - Google Patents

Abstract

The utility model discloses a laterally avoiding zero-gravity seat framework, which comprises a seat frame and a backrest framework, wherein the seat frame comprises a seat frame first side plate and a seat frame second side plate which are oppositely arranged left and right, the backrest framework comprises a backrest first side plate and a backrest second side plate which are oppositely arranged left and right, the backrest first side plate is rotatably connected with the seat frame first side plate through a first angle adjuster, the backrest second side plate is rotatably connected with the seat frame second side plate through a second angle adjuster, the lower part of the backrest first side plate deviates towards the direction of the backrest second side plate relative to the upper part of the backrest first side plate, the rear part of the seat frame first side plate deviates towards the direction of the seat frame second side plate relative to the front part of the seat frame first side plate, and a first angle adjuster is connected between the lower part of the backrest first side plate and the rear part of the seat frame first side plate. Compared with the prior art, the utility model has the beneficial effects that: through the side avoiding structure, the seat can slide greatly in the front and back direction and the backrest can be adjusted by large-angle backward tilting, and the multidirectional adjusting function of the seat is reserved in a limited space.

Description

Zero-gravity seat framework with lateral avoidance function

Technical Field

The utility model belongs to the technical field of automobile seats, and particularly relates to a zero-gravity seat framework capable of avoiding laterally.

Background

The slide adjustment function of the car seat is a standard configuration of a high-end seat, and can allow an occupant to flexibly adjust the front-back and/or left-right positions of the seat according to the needs of the occupant, thereby achieving optimal comfort. The middle-row independent seats of some vehicle types are designed with longer slide rails, so that the front-back slidable distance of the middle-row seats is larger, and passengers can obtain larger sitting space after the seat backs are laid backwards. However, the hub area of some vehicle models is close to the outer side of the seat, so that the outer side of the seat may interfere with the hub bag on the same side when the middle-row seat slides back and forth for a long distance, which limits the back and forth sliding adjustment distance of the vehicle seat, and further enriches the adjustment function of the seat becomes difficult. If the seat size is reduced as a whole, the comfort is greatly reduced. It is therefore necessary to improve the design of the seat structure to achieve long-distance adjustment of the vehicle seat back and forth in a limited space while minimizing the loss of comfort due to the size of the seat.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a laterally avoiding zero-gravity seat frame.

The technical scheme is as follows:

a laterally avoiding zero-gravity seat frame comprises a seat frame and a backrest frame, wherein the seat frame comprises a seat frame first side plate and a seat frame second side plate which are oppositely arranged on the left and right, the backrest frame comprises a backrest first side plate and a backrest second side plate which are oppositely arranged on the left and right, the backrest first side plate is rotatably connected with the seat frame first side plate through a first angle adjuster, the backrest second side plate is rotatably connected with the seat frame second side plate through a second angle adjuster, and the key is that,

the lower portion of the first side plate of the backrest is offset towards the direction of the second side plate of the backrest relative to the upper portion of the first side plate of the backrest, the rear portion of the first side plate of the seat frame is offset towards the direction of the second side plate of the seat frame relative to the front portion of the first side plate of the seat frame, and the first angle adjuster is connected between the lower portion of the first side plate of the backrest and the rear portion of the first side plate of the seat frame.

Compared with the prior art, the utility model has the beneficial effects that: the backrest framework on one side of the seat and the seat frame framework are inwardly folded, so that side avoidance is realized, the seat can be greatly slid in the front and back direction and adjusted in a large-angle backward tilting mode, interference with a side wall structure of a vehicle body is avoided, and the multidirectional adjusting function of the seat is reserved in a limited space.

Drawings

FIG. 1 is a schematic view of a first embodiment of the present invention, showing the lower yoke plate stiffener;

FIG. 2 is a schematic diagram of a second perspective of the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a schematic view of the structure of FIG. 2 from another perspective;

FIG. 5 is a left side view of FIG. 2 showing the lower web stiffener;

FIG. 6 is a schematic view of the first side panel of the backrest;

FIG. 7 is a schematic view of a connection structure between a lower yoke plate of the recliner and a first side plate of a seat frame;

FIG. 8 is a cross-sectional view C-C of FIG. 7;

FIG. 9 is a schematic view of the first side plate of the seat frame;

FIG. 10 is a bottom view of FIG. 9;

FIG. 11 is a schematic perspective view of FIG. 9;

FIG. 12 is a schematic view of the first view of the slide rail mount;

FIG. 13 is a schematic view of the slide rail seat from a second perspective;

FIG. 14 is a schematic view of a seat sideslip avoiding floor projection.

Detailed Description

The present invention will be further described with reference to the following examples and the accompanying drawings.

The utility model provides a zero gravity seat skeleton that side direction was dodged, includes seat frame and back skeleton, the seat frame is including controlling relative seat frame first sideboard 100 and the seat frame second sideboard 200 that sets up, is connected with horizontal pole and seat basin before the seat frame between the two front end, violently manages 300 behind the seat frame between the two rear end. The backrest frame comprises a backrest first side plate 400 and a backrest second side plate 600 which are arranged oppositely at the left and right, and a backrest upper transverse tube 500 which is horizontally arranged is connected between the upper ends of the backrest first side plate and the backrest second side plate.

The backrest first side plate 400 is rotatably connected with the seat frame first side plate 100 through a first angle adjuster, and the backrest second side plate 600 is rotatably connected with the seat frame second side plate 200 through a second angle adjuster. As can be seen from fig. 1 to 3, the lower portion of the first backrest side panel 400 is offset in the direction of the second backrest side panel 600 with respect to the upper portion thereof, the rear portion of the first seat frame side panel 100 is offset in the direction of the second seat frame side panel 200 with respect to the front portion thereof, and the first recliner is connected between the lower portion of the first backrest side panel 400 and the rear portion of the first seat frame side panel 100.

As a result of the offset of the lower portion of the back first side panel 400 and the offset of the rear portion of the seat frame first side panel 100, the distance from the lower portion of the back first side panel 400, the rear portion of the seat frame first side panel 100, and the first recliner to the seat midplane is less than the distance from the lower portion of the back second side panel 600, the seat frame second side panel 200, and the second recliner to the seat midplane. The middle plane of the seat is a plane passing through the upper horizontal tube 500 of the backrest of the seat and the center of the front cross bar of the seat frame and perpendicular to the upper horizontal tube. Because the width of the rear part of the seat frame is not less than the width of the front part of the seat frame in order to ensure the comfort of the conventional seat frame, the width of the lower part of the backrest is adapted to the width of the rear part of the seat frame, and an angle adjuster is connected between the side plate of the seat frame and the side plate of the backrest, the width of the seat frame at the position of the angle adjuster is the widest part of the whole seat frame. By adopting the structural design, the widest part of one side of the seat framework is retracted, and the side direction avoidance of the seat framework can be realized. The seat framework lateral avoiding structure is located on the outer side of the seat, so that interference with a seat hub bag is avoided when the seat framework moves forwards and backwards.

As shown in fig. 1, 2 and 6, the backrest first side plate 400 includes an upper side plate portion and an offset portion 710, an upper end of the offset portion 710 is fixedly connected to the upper side plate portion, the offset portion 710 is offset relative to the upper side plate portion in the direction of the backrest second side plate 600, and a space below the upper side plate portion, which faces the offset portion 710, forms a lateral escape zone 401.

As shown in fig. 6, the offset part 710 includes a recliner upper link plate 711 of the first recliner, a recliner core member 730 is connected to an outer side of a lower end of the recliner upper link plate 711, the recliner core member 730 is located in the lateral avoidance zone 401, and a recliner lower link plate 720 of the first recliner is located on an outer side of the recliner core member 730.

As can be seen from fig. 3 and 9, the first side plate 100 of the seat frame comprises a front section 101, a middle section 102 and a rear section 103 which are connected in sequence from front to back, and the front section 101, the middle section 102 and the rear section 103 are all located in a vertical plane. The rear section 103 is located at the inner side of the front section 101, the middle section 102 gradually deviates inwards from front to back and is connected between the front section 101 and the rear section 103, and the rear section 103 is connected with the lower end of the lower angle adjuster yoke plate 720. The outer side of the lower yoke plate 720 does not extend beyond the outer side of the first side plate 100 of the seat frame.

A core piece mounting area 601 is formed at the lower end of the second side plate 600 of the backrest, the core piece mounting area 601 horizontally faces the lower end of the upper connecting plate 711 of the angle adjuster, and the lower part of the second side plate 600 of the backrest serves as the upper connecting plate of the angle adjuster. A lower transverse backrest plate is connected between the lower end of the upper connecting plate 711 of the angle adjuster and the lower end of the second side backrest plate 600.

As shown in fig. 6, the recliner upper link plate 711 has a bar shape, the upper end of the recliner upper link plate 711 abuts against the inner side of the upper portion of the side plate, and the middle portion of the recliner upper link plate 711 is bent inward such that the lower portion thereof is shifted inward with respect to the upper portion thereof. The lower angle adjuster link plate 720 is also strip-shaped, the lower angle adjuster link plate 720 extends forwards while extending from top to bottom, and the middle part of the lower angle adjuster link plate 720 is bent inwards, so that the lower part thereof is inwardly offset relative to the upper part thereof and abuts against the rear section 103.

The benefit of this design is that the spacing between the lower portion of recliner upper header 711 and the upper portion of recliner lower header 720 is large enough so that a recliner core 730 of a certain thickness can fit normally between the two, but does not take up much lateral space.

In order to control the whole thickness of the angle adjuster, a single-layer plate is adopted to form an angle adjuster upper connecting plate 711 and an angle adjuster lower connecting plate 720 through sheet metal processing, and for ensuring the strength: as shown in fig. 6, an upper link plate flange 712 is integrally formed at the rear edge of the upper link plate 711 of the recliner, an upper link plate reinforcing plate 713 is attached to the inner side of the upper link plate 711 of the recliner, the upper link plate reinforcing plate 713 extends from the upper part to the lower part of the upper link plate 711 of the recliner, and a reinforcing rib is vertically formed on the upper link plate reinforcing plate 713; as shown in fig. 5, a lower yoke plate reinforcement plate 721 is disposed outside the lower yoke plate 720, and the lower yoke plate reinforcement plate 721 is fixedly attached to an outer side surface of the lower yoke plate 720 along an extending direction of the lower yoke plate 720.

As can be seen in connection with fig. 5 and 6, the upper portion of the edge panel includes a first edge panel outer sheet metal 410 and a first edge panel inner sheet metal 420. The first side plate outer metal plate 410 includes a first outer plate 411, both sides of the first outer plate 411 face to the left and right direction, respectively, a first side plate flange 412 facing to the backrest second side plate 600 is connected to the edge of the first outer plate 411, and the first side plate flange 412 is continuously arranged along the front edge, the lower edge and the rear edge of the first outer plate 411. The first side plate inner metal plate 420 is arranged on the inner side of the first outer plate 411, the first side plate inner metal plate 420 is connected with the front edge and the rear edge of the first side plate flanging 412, and the inner side of the first side plate inner metal plate 420 is attached to the upper portion of the angle adjuster upper connecting plate 711.

The first side plate inner metal plate 420 comprises a first inner plate 421, the first inner plate 421 is arranged opposite to the first outer plate 411 in parallel, a first inner plate front flange 422 is integrally formed on the front side of the first inner plate 421, and a first inner plate rear flange 423 is integrally formed on the rear side of the first inner plate 421. The first inner panel forward flange 422 faces outwardly and abuts the forward edge of the first side panel flange 412. The first inner panel rear flange 423 faces inward and abuts the rear edge of the first panel flange 412. The upper yoke flange 712 abuts against the front side of the first side flange 412 and is welded thereto.

A first backrest side tube 510 is integrally formed at one end of the upper backrest cross tube 500 corresponding to the first backrest side plate 400, and the first backrest side tube 510 extends downward and is connected to the first backrest side plate 400. The other end of the upper backrest cross tube 500 is integrally formed with a second backrest side tube 520, and the second backrest side tube 520 is welded to the second backrest side plate 600.

The lower end of the first side tube 510 of the backrest abuts against the inner side of the first outer plate 411, and the upper end of the first outer plate 411 is narrowed so as to surround the first side tube 510 of the backrest with the upper part of the first side flange 412. The upper rear edge of the first inner plate 421 is attached to the first side tube 510 of the backrest, the width of the lower part of the first inner plate 421 is increased, and the rear edge of the widened part of the first inner plate 421 is connected with the first inner plate rear flange 423. The widened portion of the first inner plate 421 is used to connect with the upper portion of the recliner upper yoke plate 711, so that the recliner upper yoke plate 711 can be designed to be wide, thereby improving mechanical properties. The recliner upper yoke plate 711 actually serves as part of the first side plate 400 of the backrest. The outer metal plate 410 of the first side plate, the inner metal plate 420 of the first side plate and the first side pipe 510 of the backrest form a frame type hollow structure, so that the strength is ensured, and the weight is reduced.

During assembly, the first side pipe 510 of the backrest, the outer metal plate 410 of the first side plate and the inner metal plate 420 of the first side plate are welded firstly, and then the upper connecting plate 711 of the angle adjuster and the inner metal plate 420 of the first side plate are jointed and welded.

Because the rear portion of the seat frame first side panel 100 is offset inwardly, occupant discomfort may result if the upper edge of the seat frame continues to be of conventional design. Therefore, in the horizontal direction, the front section 101 of the first side plate 100 of the seat frame extends straight backwards, and the connecting portion of the middle section 102 and the rear section 103 is recessed to form an upper escape area 104. That is, as shown in fig. 4 and 9 to 11, the middle section 102 gradually extends downward from front to back in the horizontal direction, and then is connected to the front end of the rear section 103, and the rear section 103 gradually extends upward from front to back. The upper edge of the seat frame first side plate 100 corresponding to the upper escape area 104 is lowered, and thicker seat foam can be laid on the upper side of the seat frame first side plate. In this embodiment, the lowest point of the upper edge of the seat frame first side plate 100 corresponding to the upper escape area 104 is 30-60 mm lower than the upper edge of the seat frame second side plate 200 at the opposite side.

The first side plate 100 of the seat frame comprises a groove-shaped inner metal plate 110, and the extending direction of the inner metal plate 110 from front to back is consistent with the extending direction of the front section 101, the middle section 102 and the rear section 103. The notch of inboard panel beating 110 is towards the outside, buckle closure has the outside panel beating 120 rather than the shape suits on the notch of inboard panel beating 110, and this outside panel beating 120 also is the strip, the rear end of this outside panel beating 120 with the rear end of inboard panel beating 110 is just to the lock, and the front end of this outside panel beating 120 is close to the front end of inboard panel beating 110.

As shown in fig. 10, the upper groove wall of the inner metal plate 110 extends outward and then downward, and the lower groove wall of the inner metal plate 110 extends outward and then upward, so that secondary flanging is formed at the upper edge and the downstream of the inner metal plate 110, respectively, to improve the strength. The outer metal plate 120 includes a strip-shaped outer plate body, and an inward upward flange 121 is connected to an upper edge of the outer plate body. The upper edge and the lower edge of the outer plate body respectively cling to the upper groove wall and the lower groove wall of the inner metal plate 110 and are welded, and the upper flanging 121 falls on the upper groove wall.

A seat frame rear cross tube 300 is connected between the rear ends of the seat frame first side plate 100 and the seat frame second side plate 200 to allow the seat frame first side plate 100 and the seat frame second side plate 200 to rotate relative to the seat frame rear cross tube 300. A rear cross tube coupling hole 105 is formed through the rear end of the rear section 103 of the seat frame first side panel 100, the seat frame rear cross tube 300 is formed through the rear cross tube coupling hole 105, and a lower link coupling hole 106 is formed through the front portion of the rear section 103.

As shown in fig. 7 and 8, the recliner lower yoke 720 is attached to the outside of the seat frame first side plate 100, and an axial connecting member is rotatably inserted into the recliner lower yoke 720 and inserted into the seat frame rear cross tube 300, and is connected to the seat frame rear cross tube 300.

In this embodiment, the axial connector is a step bolt 320, the step bolt 320 includes a screw section, a smooth rod section and a screw head, the screw section is inserted into the seat frame rear horizontal tube 300 and is in threaded connection with the seat frame rear horizontal tube, the smooth rod section is inserted into the angle adjuster lower link plate 720, and the screw head limits the angle adjuster lower link plate 720 from the outside.

In order to improve the strength of the local section of the seat frame rear transverse tube 300, a reinforcing threaded sleeve 310 is fixedly arranged in the seat frame rear transverse tube 300, the reinforcing threaded sleeve 310 is concentrically embedded in the end part of the seat frame rear transverse tube 300 positioned in the rear transverse tube connecting hole 105, and the screw section is arranged in the reinforcing threaded sleeve 310 in a penetrating manner and is in threaded fit with the screw section. The outer diameter of the screw section is smaller than that of the smooth rod section, and the step at the joint of the smooth rod and the screw section limits the position of the seat frame first side plate 100, the reinforcing screw sleeve 310 and the seat frame rear transverse tube 300.

The inner side metal plate 110 and the outer side metal plate 120 form annular plates of the hole wall of the rear horizontal tube connecting hole 105, and the annular plates are oppositely offset to be close to each other, so that the rear horizontal tube connecting hole 105 is locally reinforced.

The seat frame rear cross tubes 300 at two ends of the rear cross tube connecting holes 105 are respectively sleeved with separating ring pads 330, the two separating ring pads 330 are respectively attached to the inner side surfaces of the inner side metal plates 110 and the outer side surfaces of the outer side metal plates 120 and are positioned in the inner side depressions of the inner side metal plates 110 and the outer side local depressions of the outer side metal plates 120 surrounding the rear cross tube connecting holes 105, and the seat frame first side plates 100 are separated from the seat frame supporting seats and the lower angle adjuster connecting plates 720 at two sides of the seat frame first side plates 100. In this way, on the one hand, a noise reduction effect can be achieved, and on the other hand, the axial direction of the rear cross tube connecting hole 105 has a stabilizing effect on various parts.

Bolts are arranged on the angle adjuster lower connecting plate 720 corresponding to the lower connecting plate connecting holes 106 and penetrate through the lower connecting plate connecting holes 106, so that the angle adjuster lower connecting plate 720 is connected with the seat frame first side plate 100.

Since the recliner lower yoke 720 and the seat frame first side plate 100 should be connected by at least two connection points, one of the connection points is located at the connection point of the seat frame rear cross tube 300 and the seat frame first side plate 100 in the present invention. The advantage of this design is that on the one hand, one connection point on the first seat frame side plate 100 is reduced, and on the other hand, the end of the seat frame rear cross tube 300 is axially limited, which simplifies the connection structure between the recliner lower yoke plate 720, the first seat frame side plate 100 and the seat frame rear cross tube 300 as a whole.

In addition, as shown in fig. 1 and 5, a slide rail assembly 800 is disposed below the seat frame, the slide rail assembly 800 includes a longitudinal slide rail assembly 810, a transverse slide rail assembly 820 is disposed above the longitudinal slide rail assembly 810, and the transverse slide rail assembly 820 supports the seat frame through the seat support 900. Through the transverse sliding of the seat, the seat is integrally farther away from the side wall of the vehicle body, and further avoids the hub. The lateral sliding function is combined with the lateral avoiding structure, so that the vehicle seat in a limited space has a larger front-back sliding range, a plurality of adjusting functions such as backrest adjustment, seat frame angle adjustment and leg support adjustment are allowed to be integrated on the seat, the requirement of the lying posture of a user is met, and the body can be fully extended.

The longitudinal sliding rail assemblies 810 are arranged in two groups, the longitudinal sliding rail assemblies 810 are arranged on the vehicle floor X in parallel along the front-back direction of the vehicle, and each longitudinal sliding rail assembly 810 comprises a longitudinal lower sliding rail and a longitudinal upper sliding rail matched with the longitudinal lower sliding rail. In a use scene of the car seat, a strip-shaped slide rail seat 830 extending along the trend of each longitudinal upper slide rail is arranged above each longitudinal upper slide rail, two groups of transverse slide rail assemblies 820 are fixedly arranged above the two slide rail seats 830, and the two groups of transverse slide rail assemblies 820 are respectively positioned at two ends of the slide rail seats 830. The front end of the rail seat 830 is lower than the rear end, so that the lateral sliding rail assembly 820 at the front end is lower than the lateral sliding rail assembly 820 at the rear end. The transverse sliding rail assembly 820 comprises a transverse lower sliding rail and a transverse sliding rail matched with the transverse lower sliding rail, and two ends of the transverse lower sliding rail are respectively connected with the same ends of the two sliding rail seats 830. The seat support 900 is fixedly arranged above the two transverse sliding rails, the seat frame is arranged above the seat support 900, the seat frame is horizontally arranged above the seat support 900, and therefore the seat frame is installed in a horizontal state, meanwhile, the lower portion of the seat support 900 is of a structure with a low front portion and a high rear portion and is complementary with the two transverse sliding rail assemblies 820, and balance is achieved.

Specifically, as shown in fig. 12 and 13, the rail seat 830 includes a groove-shaped body which is opened upward and extends along the length direction of the longitudinal rail assembly 810, and both side groove walls of the groove-shaped body are gradually lowered from the middle of the groove-shaped body to the front thereof, so that a front mounting portion 831 is formed at the front of the groove-shaped body. Supporting flanges 833 are formed outside groove walls on two sides of the groove-shaped body respectively, a rear mounting seat 840 is arranged on a rear notch of the groove-shaped body, the rear mounting seat 840 falls on the supporting flanges 833, and therefore the rear mounting seat 840 is higher than the front mounting portion 831. The rear horizontal lower slide rail is mounted on the two rear mounting seats 840 by bolts, and the front horizontal lower slide rail is mounted on the two front mounting portions 831 by bolts.

Thus, as shown in fig. 14, when the seat is slid laterally, the lateral slide rail located rearward can avoid the floor projection Y on the seat side due to its high position. In this scenario, the vehicle seat can be adjusted in multiple directions in a limited space.

Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.

Claims (10)

1. The utility model provides a zero gravity seat skeleton that side direction was dodged, includes seat frame and back skeleton, the seat frame is including controlling the relative first sideboard of seat frame (100) and seat frame second sideboard (200) that set up, the back skeleton is including controlling the relative first sideboard of back (400) and back second sideboard (600) that set up, wherein the first sideboard of back (400) with the first sideboard of seat frame (100) rotate through first angle modulation ware and are connected, back second sideboard (600) with seat frame second sideboard (200) rotate through the second angle modulation ware and are connected its characterized in that:

the lower portion of the first backrest side plate (400) is offset towards the direction of the second backrest side plate (600) relative to the upper portion of the first backrest side plate, the rear portion of the first seat frame side plate (100) is offset towards the direction of the second seat frame side plate (200) relative to the front portion of the first seat frame side plate, and the first angle adjuster is connected between the lower portion of the first backrest side plate (400) and the rear portion of the first seat frame side plate (100).

2. The laterally avoided zero-gravity seat frame of claim 1, wherein: the first side plate (400) of the backrest comprises an upper side plate part and an offset part (710), the upper end of the offset part (710) is fixedly connected with the upper side plate part, the offset part (710) is offset towards the direction of the second side plate (600) of the backrest relative to the upper side plate part, and a lateral avoidance area (401) is formed in a space facing the offset part (710) below the upper side plate part;

the offset part (710) comprises an angle adjuster upper connecting plate (711) of the first angle adjuster, the outer side of the lower end of the angle adjuster upper connecting plate (711) is connected with an angle adjuster core piece, the angle adjuster core piece is positioned in the lateral avoiding area (401), and the angle adjuster lower connecting plate (720) of the first angle adjuster is positioned on the outer side of the angle adjuster core piece;

the first side plate (100) of the seat frame comprises a front section (101), a middle section (102) and a rear section (103) which are sequentially connected from front to back, and the front section (101), the middle section (102) and the rear section (103) are all positioned in a vertical plane;

the rear section (103) is located on the inner side of the front section (101), the middle section (102) gradually deflects inwards from front to back and is connected between the front section (101) and the rear section (103), and the rear section (103) is connected with the lower end of the lower angle adjuster connecting plate (720).

3. The laterally avoided zero-gravity seat frame of claim 2, wherein: a core piece mounting area (610) is formed at the lower end of the second side plate (600) of the backrest, and the core piece mounting area (610) is horizontally opposite to the lower end of the upper yoke plate (711) of the angle adjuster;

a lower transverse backrest plate is connected between the lower end of the upper connecting plate (711) of the angle adjuster and the lower end of the second side backrest plate (600);

the angle adjuster lower connecting plate (720) extends forwards while extending downwards from top to bottom, and the middle part of the angle adjuster lower connecting plate (720) is bent inwards to enable the lower part of the angle adjuster lower connecting plate to be inwards offset relative to the upper part of the angle adjuster lower connecting plate and abut against the rear section (103).

4. The laterally avoided zero-gravity seat frame of claim 3, wherein: the upper connecting plate (711) of the angle adjuster is strip-shaped, the upper end of the upper connecting plate (711) of the angle adjuster is attached to the inner side of the upper part of the side plate, and the middle part of the upper connecting plate (711) of the angle adjuster is bent inwards to enable the lower part of the upper connecting plate to deviate inwards relative to the upper part of the upper connecting plate;

the rear edge of the upper connecting plate (711) of the angle adjuster is integrally formed with an upper connecting plate flanging (712);

an upper connecting plate reinforcing plate (713) is attached to the inner side of the upper connecting plate (711) of the angle adjuster, the upper connecting plate reinforcing plate (713) extends from the upper portion of the upper connecting plate (711) of the angle adjuster to the lower portion of the upper connecting plate (711), and reinforcing ribs are vertically formed on the upper connecting plate reinforcing plate (713).

5. The laterally avoided zero-gravity seat frame of claim 4, wherein: the upper part of the side plate comprises a first side plate outer metal plate (410) and a first side plate inner metal plate (420);

the first side plate outer metal plate (410) comprises a first outer plate (411), two sides of the first outer plate (411) face to the left and right direction respectively, a first side plate flanging (412) facing to the backrest second side plate (600) is connected to the edge of the first outer plate (411), and the first side plate flanging (412) is continuously arranged along the front edge, the lower edge and the rear edge of the first outer plate (411);

the inner side of the first outer plate (411) is provided with the first side plate inner metal plate (420), the first side plate inner metal plate (420) is connected with the front side and the rear side of the first side plate flanging (412), and the angle adjuster upper connecting plate (711) is attached to the inner side of the first side plate inner metal plate (420).

6. The laterally avoided zero-gravity seat frame according to any one of claims 2 to 5, wherein: in the horizontal direction, a front section (101) of the first side plate (100) of the seat frame extends backwards in a straight line, and a connecting part of the middle section (102) and the rear section (103) is concave downwards to form an upper avoidance area (104);

the connecting part of the middle section (102) and the rear section (103) is lower than the corresponding part of the second side plate (600) of the backrest opposite to the middle section.

7. The laterally avoided zero-gravity seat frame of claim 6, wherein: a seat frame rear transverse pipe (300) is connected between the rear ends of the seat frame first side plate (100) and the seat frame second side plate (200) to allow the seat frame first side plate (100) and the seat frame second side plate (200) to rotate relative to the seat frame rear transverse pipe (300);

a rear horizontal tube connecting hole (105) penetrates through the tail end of the rear section (103), and the seat frame rear horizontal tube (300) penetrates through the rear horizontal tube connecting hole (105);

the angle adjuster lower yoke plate (720) is attached to the outer side of the seat frame first side plate (100), an axial connecting piece is arranged on the angle adjuster lower yoke plate (720) in a penetrating mode in a rotating mode, penetrates through the seat frame rear transverse pipe (300) and is connected with the seat frame rear transverse pipe (300);

the angle adjuster lower yoke plate (720) is also provided with another connecting piece, the front part of the rear section (103) is penetrated with a lower yoke plate connecting hole (106) corresponding to the connecting piece, and the connecting piece is penetrated in the lower yoke plate connecting hole (106).

8. The laterally avoided zero-gravity seat frame of claim 7, wherein: the axial connecting piece is a step bolt (320), the step bolt (320) comprises a screw rod section, a smooth rod section and a screw head, the screw rod section is arranged in the seat frame rear transverse tube (300) in a penetrating mode and is in threaded connection with the seat frame rear transverse tube, the smooth rod section is arranged in the angle adjuster lower connecting plate (720) in a penetrating mode, and the screw head limits the angle adjuster lower connecting plate (720) from the outer side.

9. The laterally avoided zero-gravity seat frame of claim 8, wherein: a reinforcing threaded sleeve (310) is fixedly arranged in the seat frame rear transverse pipe (300), the reinforcing threaded sleeve (310) is concentrically embedded in the end part, located in the rear transverse pipe connecting hole (105), of the seat frame rear transverse pipe (300), the screw rod section penetrates through the reinforcing threaded sleeve (310), and the screw rod section and the reinforcing threaded sleeve are in threaded fit;

the outer diameter of the screw rod section is smaller than that of the smooth rod section, and the step at the joint of the smooth rod section and the screw rod section is limited on the outer side of the first edge plate (100) of the seat frame.

10. The laterally avoided zero-gravity seat frame of claim 1, wherein: a longitudinal sliding rail assembly (810) is arranged below the seat frame, a transverse sliding rail assembly (820) is arranged above the longitudinal sliding rail assembly (810), and the seat frame is supported by the transverse sliding rail assembly (820) through a seat support (900).

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