A zero-gravity seat frame for lateral avoidance

Abstract

This invention discloses a zero-gravity seat frame with lateral avoidance, comprising a seat frame and a backrest frame. The seat frame includes a first side plate and a second side plate arranged opposite to each other. The backrest frame includes a first side plate and a second side plate arranged opposite to each other. The first side plate of the backrest is rotatably connected to the first side plate of the seat frame via a first angle adjuster, and the second side plate of the backrest is rotatably connected to the second side plate of the seat frame via a second angle adjuster. The lower part of the first side plate of the backrest is offset relative to its upper part towards the second side plate of the backrest, and the rear part of the first side plate of the seat frame is offset relative to its front part towards the second side plate of the seat frame. The first angle adjuster connects the lower part of the first side plate of the backrest and the rear part of the first side plate of the seat frame. Compared with the prior art, the beneficial effects of this invention are: through the lateral avoidance structure, the seat can slide significantly in the fore-and-aft direction and the backrest can be adjusted to a large angle of recline, retaining the multi-directional adjustment function of the seat within a limited space.

Description

Technical Field

[0001] This invention belongs to the field of automotive seat technology, specifically relating to a zero-gravity seat frame with lateral avoidance. Background Technology

[0002] Sliding adjustment of car seats is a standard feature of high-end seats. This function allows occupants to flexibly adjust the seat's fore-aft and / or lateral position according to their needs, thereby achieving optimal comfort. Some models feature independent middle-row seats with long sliding rails, allowing for a large fore-aft sliding distance. When the seatbacks are folded back, occupants gain considerable legroom. However, in some models, the wheel arch area is located close to the outer edge of the seat. This can cause interference between the outer edge of the seat and the wheel arch on the same side during long-distance fore-aft sliding, limiting the fore-aft adjustment distance and making it difficult to further expand the seat's adjustment functions. Reducing the overall seat size would significantly decrease comfort. Therefore, it is necessary to improve the seat structure design to achieve long-distance fore-aft adjustment within a limited space, while minimizing the loss of comfort caused by seat size. Summary of the Invention

[0003] In view of this, the present invention provides a zero-gravity seat frame for lateral avoidance.

[0004] The technical solution is as follows:

[0005] A zero-gravity seat frame for lateral avoidance includes a seat frame and a backrest frame. The seat frame includes a first side plate and a second side plate arranged opposite each other. The backrest frame includes a first side plate and a second side plate arranged opposite each other. The first side plate of the backrest is rotatably connected to the first side plate of the seat frame via a first angle adjuster, and the second side plate of the backrest is rotatably connected to the second side plate of the seat frame via a second angle adjuster. The key feature is...

[0006] The lower part of the first side panel of the backrest is offset relative to its upper part toward the second side panel of the backrest, and the rear part of the first side panel of the seat frame is offset relative to its front part toward the second side panel of the seat frame. The first angle adjuster is connected between the lower part of the first side panel of the backrest and the rear part of the first side panel of the seat frame.

[0007] Compared with the prior art, the beneficial effects of the present invention are as follows: by designing the inward-curving connection between the backrest frame and the seat frame on one side of the seat, lateral avoidance is achieved, thereby allowing the seat to slide significantly in the fore-and-aft direction and the backrest to recline at a large angle without interfering with the side structure of the vehicle body, thus preserving the multi-directional adjustment function of the seat within a limited space. Attached Figure Description

[0008] Figure 1This is a structural schematic diagram from the first perspective of the present invention, and the lower connecting plate reinforcing plate is not shown in the figure;

[0009] Figure 2 This is a structural schematic diagram from a second perspective of the present invention;

[0010] Figure 3 for Figure 2 Top view;

[0011] Figure 4 for Figure 2 Another structural diagram from a different perspective;

[0012] Figure 5 for Figure 2 The left view shows the lower connecting plate reinforcement plate;

[0013] Figure 6 This is a structural diagram of the first side panel of the backrest;

[0014] Figure 7 This is a schematic diagram of the connection structure between the lower connecting plate of the angle adjuster and the first side plate of the seat frame.

[0015] Figure 8 for Figure 7 CC section view;

[0016] Figure 9 This is a structural schematic diagram of the first side plate of the seat frame;

[0017] Figure 10 for Figure 9 A bottom view;

[0018] Figure 11 for Figure 9 A schematic diagram of the three-dimensional structure;

[0019] Figure 12 A structural schematic diagram of the slide rail base from the first perspective;

[0020] Figure 13 This is a structural schematic diagram of the slide rail base from a second perspective;

[0021] Figure 14 This is a diagram illustrating how a seat slides sideways to avoid a floor protrusion. Detailed Implementation

[0022] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0023] A zero-gravity seat frame for lateral avoidance includes a seat frame and a backrest frame. The seat frame includes a first side plate 100 and a second side plate 200 arranged opposite each other, with a front crossbar and a seat basin connected between their front ends, and a rear cross tube 300 connected between their rear ends. The backrest frame includes a first side plate 400 and a second side plate 600 arranged opposite each other, with a horizontally arranged upper cross tube 500 connected between their upper ends.

[0024] The first side panel 400 of the backrest and the first side panel 100 of the seat frame are rotatably connected via a first angle adjuster, and the second side panel 600 of the backrest and the second side panel 200 of the seat frame are rotatably connected via a second angle adjuster. Figures 1-3 As can be seen, the lower part of the first side panel 400 of the backrest is offset relative to its upper part towards the second side panel 600 of the backrest, and the rear part of the first side panel 100 of the seat frame is offset relative to its front part towards the second side panel 200 of the seat frame. The first angle adjuster is connected between the lower part of the first side panel 400 of the backrest and the rear part of the first side panel 100 of the seat frame.

[0025] The result of the lower offset of the first side panel 400 of the backrest and the rear offset of the first side panel 100 of the seat frame is that the distances from the lower part of the first side panel 400 of the backrest, the rear part of the first side panel 100 of the seat frame, and the first adjuster to the center plane of the seat are less than the distances from the lower part of the second side panel 600 of the backrest, the second side panel 200 of the seat frame, and the second adjuster to the center plane of the seat on the other side. The center plane of the seat refers to the plane passing through the center of the upper cross tube 500 of the seat back and the center of the front cross bar of the seat frame, and perpendicular to it. Since conventional seat frames, to ensure comfort, have a rear width of the seat frame that is not less than its front width, and the lower width of the backrest that is adapted to the rear width of the seat frame, and an adjuster is also connected between the seat frame side panel and the backrest side panel, the width of the seat frame at the location of the adjuster is the widest point of the entire seat frame. With this structural design of the present invention, the widest point on one side of the seat frame is recessed, which can achieve lateral avoidance of the seat frame. The seat frame's lateral avoidance structure is located on the outside of the seat to prevent interference with the seat hub package during forward and backward movement.

[0026] like Figure 1 , 2 As shown in Figure 6, the first side panel 400 of the backrest includes an upper part of the side panel and an offset part 710. The upper end of the offset part 710 is fixedly connected to the upper part of the side panel. The offset part 710 is offset relative to the upper part of the side panel towards the second side panel 600 of the backrest. A lateral clearance area 401 is formed in the space below the upper part of the side panel directly opposite the offset part 710.

[0027] like Figure 6The offset portion 710 includes an upper connecting plate 711 of the first angle adjuster, the lower outer side of which is connected to the core component 730 of the angle adjuster. The core component 730 of the angle adjuster is located within the lateral avoidance zone 401, and the lower connecting plate 720 of the first angle adjuster is located outside the core component 730 of the angle adjuster.

[0028] Combination Figure 3 and 9 As can be seen, the first side plate 100 of the seat frame includes a front section 101, a middle section 102, and a rear section 103 connected sequentially from front to back. All three sections are located in a vertical plane. The rear section 103 is located inside the front section 101. The middle section 102 gradually shifts inward from front to back, connecting the front section 101 and the rear section 103. The rear section 103 is connected to the lower end of the lower adjusting plate 720. The outer side of the lower adjusting plate 720 does not extend beyond the outer surface of the first side plate 100 of the seat frame.

[0029] The lower end of the second side panel 600 of the backrest has a core component mounting area 601, which is horizontally aligned with the lower end of the upper connecting plate 711 of the angle adjuster. The lower part of the second side panel 600 of the backrest serves as the upper connecting plate of the angle adjuster on this side. A lower horizontal plate of the backrest is connected between the lower end of the upper connecting plate 711 of the angle adjuster and the lower end of the second side panel 600 of the backrest.

[0030] like Figure 6 As shown, the upper connecting plate 711 of the angle adjuster is strip-shaped, with its upper end abutting the inner side of the upper part of the side plate. The middle portion of the upper connecting plate 711 is bent inward so that its lower portion is offset inward relative to its upper portion. The lower connecting plate 720 of the angle adjuster is also strip-shaped, extending downward and forward simultaneously. The middle portion of the lower connecting plate 720 is bent inward so that its lower portion is offset inward relative to its upper portion and abuts the rear section 103.

[0031] The advantage of this design is that the gap between the lower part of the upper connecting plate 711 and the upper part of the lower connecting plate 720 of the angle adjuster is large enough, so that the core component 730 of the angle adjuster with a certain thickness can be installed normally between the two without taking up too much lateral space.

[0032] To control the overall thickness of the angle adjuster, a single-layer sheet metal assembly is used to form the upper connecting plate 711 and the lower connecting plate 720 of the angle adjuster. To ensure strength: Figure 6The rear edge of the upper connecting plate 711 of the angle adjuster is integrally formed with an upper connecting plate flange 712. An upper connecting plate reinforcing plate 713 is attached to the inner side of the upper connecting plate 711. The upper connecting plate reinforcing plate 713 extends from the upper part to the lower part of the upper connecting plate 711, and vertical reinforcing ribs are formed on the upper connecting plate reinforcing plate 713. Figure 5 A lower connecting plate reinforcing plate 721 is provided on the outer side of the lower connecting plate 720 of the angle adjuster. The lower connecting plate reinforcing plate 721 is fixedly attached to its outer side along the extension direction of the lower connecting plate 720 of the angle adjuster.

[0033] Combination Figure 5 and 6 As can be seen, the upper part of the side plate includes a first outer sheet metal 410 and a first inner sheet metal 420. The first outer sheet metal 410 includes a first outer plate 411, with both sides of the first outer plate 411 facing left and right respectively. The edge of the first outer plate 411 is connected to a first side plate flange 412 facing the second side plate 600 of the backrest. The first side plate flange 412 is continuously arranged along the front, bottom and rear edges of the first outer plate 411. The first inner sheet metal 420 is provided on the inner side of the first outer plate 411. The first inner sheet metal 420 is connected to the front and rear edges of the first side plate flange 412. The inner side of the first inner sheet metal 420 abuts against the upper part of the upper connecting plate 711 of the angle adjuster.

[0034] The first side panel inner sheet metal 420 includes a first inner panel 421, which is parallel to and directly opposite the first outer panel 411. The front edge of the first inner panel 421 has an integrally formed first inner panel front flange 422, and the rear edge of the first inner panel 421 has an integrally formed first inner panel rear flange 423. The first inner panel front flange 422 faces outward and abuts against the front edge of the first side panel flange 412. The first inner panel rear flange 423 faces inward and abuts against the rear edge of the first side panel flange 412. The upper connecting plate flange 712 abuts against the front side of the first side panel flange 412 and is welded together.

[0035] The upper horizontal tube 500 of the backrest has a first side tube 510 integrally formed at one end corresponding to the first side plate 400 of the backrest. The first side tube 510 extends downward and connects to the first side plate 400 of the backrest. The other end of the upper horizontal tube 500 has a second side tube 520 integrally formed, which is welded to the second side plate 600 of the backrest.

[0036] The lower end of the first side tube 510 of the backrest abuts against the inner side of the first outer panel 411. The upper end of the first outer panel 411 narrows, thus wrapping around the upper part of the first side panel flange 412. The upper rear edge of the first inner panel 421 abuts against the first side tube 510 of the backrest. The lower width of the first inner panel 421 is increased, and the rear edge of the widened portion of the first inner panel 421 is connected to the rear flange 423 of the first inner panel. The widened portion of the first inner panel 421 is used to connect with the upper part of the upper connecting plate 711 of the angle adjuster, allowing the upper connecting plate 711 of the angle adjuster to be designed to be wider, thereby improving mechanical performance. The upper connecting plate 711 of the angle adjuster actually serves as part of the first side panel 400 of the backrest. The outer sheet metal 410 of the first side panel, the inner sheet metal 420 of the first side panel, and the first side tube 510 of the backrest form a frame-type hollow structure, which reduces weight while ensuring strength.

[0037] During assembly, the first side tube 510 of the backrest, the outer sheet metal 410 of the first side plate, and the inner sheet metal 420 of the first side plate are welded together first, and then the upper connecting plate 711 of the angle adjuster is attached and welded to the inner sheet metal 420 of the first side plate.

[0038] Because the rear of the first side panel 100 of the seat frame is offset inward, continuing with a conventional design for its upper edge could cause discomfort to the occupant. Therefore, in the horizontal direction, the front section 101 of the first side panel 100 of the seat frame extends rearward in a straight line, and the connection between the middle section 102 and the rear section 103 is recessed to form an upper clearance area 104. That is, as... Figure 4 and 9 As shown in Figure 11, in the horizontal direction, the middle section 102 gradually extends downwards from front to back and then connects with the front end of the rear section 103, which gradually extends upwards from front to back. The upper edge of the first side plate 100 of the seat frame corresponding to the upper clearance area 104 is lowered, allowing for the installation of a thicker layer of seat foam. In this embodiment, the lowest point of the upper edge of the first side plate 100 of the seat frame corresponding to the upper clearance area 104 is 30-60 mm lower than the upper edge of the second side plate 200 of the seat frame on the opposite side.

[0039] The first side plate 100 of the seat frame includes a groove-shaped inner sheet metal 110. The extension direction of the inner sheet metal 110 from front to back is consistent with the extension direction of the front section 101, the middle section 102, and the rear section 103. The groove of the inner sheet metal 110 faces outward, and an outer sheet metal 120 adapted to its shape is fastened to the groove of the inner sheet metal 110. The outer sheet metal 120 is also strip-shaped, and its rear end is directly opposite to the rear end of the inner sheet metal 110. The front end of the outer sheet metal 120 is close to the front end of the inner sheet metal 110.

[0040] like Figure 10The upper groove wall of the inner sheet metal 110 extends outward and then downward, while the lower groove wall of the inner sheet metal 110 extends outward and then upward, thus forming secondary flanges at the upper and lower edges of the inner sheet metal 110 to improve strength. The outer sheet metal 120 includes a strip-shaped outer plate, the upper edge of which is connected to an inwardly upturned flange 121. The upper and lower edges of the outer plate are respectively attached to and welded to the upper and lower groove walls of the inner sheet metal 110, with the upturned flange 121 resting on the upper groove wall.

[0041] A rear horizontal tube 300 is connected between the rear ends of the first side plate 100 and the second side plate 200 of the seat frame to allow the first side plate 100 and the second side plate 200 to rotate relative to the rear horizontal tube 300. For the first side plate 100, the rear end of its rear section 103 has a rear horizontal tube connecting hole 105 through which the rear horizontal tube 300 passes. The front part of the rear section 103 has a lower connecting plate connecting hole 106 through which it passes.

[0042] like Figure 7 and 8 As shown, the lower connecting plate 720 of the angle adjuster is attached to the outside of the first side plate 100 of the seat frame. An axial connector is rotatably provided on the lower connecting plate 720 of the angle adjuster. The axial connector is inserted into the rear horizontal tube 300 of the seat frame and connected to the rear horizontal tube 300 of the seat frame.

[0043] In this embodiment, the axial connecting member is a stepped bolt 320, which includes a screw section, a smooth rod section, and a screw head. The screw section passes through the rear horizontal tube 300 of the seat frame and is threadedly connected to it. The smooth rod section passes through the lower connecting plate 720 of the angle adjuster. The screw head limits the lower connecting plate 720 of the angle adjuster from the outside.

[0044] To improve the strength of certain sections of the rear horizontal tube 300 of the seat frame, a reinforcing threaded sleeve 310 is fixedly installed inside the rear horizontal tube 300. The reinforcing threaded sleeve 310 is concentrically embedded in the end of the rear horizontal tube 300 located in the rear horizontal tube connecting hole 105. The threaded section passes through the reinforcing threaded sleeve 310, and the two are threaded together. The outer diameter of the threaded section is smaller than the outer diameter of the smooth section. The stepped surface at the connection between the smooth section and the threaded section limits the outer side of the first side plate 100 of the seat frame, the reinforcing threaded sleeve 310, and the rear horizontal tube 300 of the seat frame.

[0045] The inner sheet metal 110 and the outer sheet metal 120 form annular plates that offset towards each other to form the wall of the rear horizontal tube connection hole 105, thereby providing local reinforcement to the rear horizontal tube connection hole 105.

[0046] Separating rings 330 are respectively fitted onto the rear horizontal tubes 300 of the seat frame at both ends of the rear horizontal tube connection hole 105. The two separating rings 330 are respectively attached to the inner side of the inner sheet metal 110 and the outer side of the outer sheet metal 120, located in the inner recess of the inner sheet metal 110 and the outer partial recess of the outer sheet metal 120 surrounding the rear horizontal tube connection hole 105, separating the first side plate 100 of the seat frame from the lower connecting plates 720 of the angle adjuster on both sides and the seat frame support. In this way, on the one hand, it can play a role in noise reduction, and on the other hand, it plays a role in stabilizing the various parts in the axial direction of the rear horizontal tube connection hole 105.

[0047] A bolt is provided on the lower connecting plate 720 of the angle adjuster corresponding to the lower connecting plate connecting hole 106. The bolt passes through the lower connecting plate connecting hole 106, thereby connecting the lower connecting plate 720 of the angle adjuster to the first side plate 100 of the seat frame.

[0048] Since the lower connecting plate 720 of the angle adjuster and the first side plate 100 of the seat frame should be connected by at least two connection points, in this invention, one of the connection points is placed at the connection between the rear horizontal tube 300 of the seat frame and the first side plate 100 of the seat frame. The advantage of this design is that, on the one hand, it reduces one connection node on the first side plate 100 of the seat frame, and on the other hand, it provides axial limitation on the end of the rear horizontal tube 300 of the seat frame. Overall, it simplifies the connection structure between the lower connecting plate 720 of the angle adjuster, the first side plate 100 of the seat frame, and the rear horizontal tube 300 of the seat frame.

[0049] In addition, such as Figure 1 and 5 As shown, a slide rail assembly 800 is provided below the seat frame. The slide rail assembly 800 includes a longitudinal slide rail assembly 810, and a transverse slide rail assembly 820 is provided above the longitudinal slide rail assembly 810. The transverse slide rail assembly 820 supports the seat frame via a seat support 900. By sliding the seat laterally, the seat can be moved further away from the side of the vehicle body, further avoiding wheel rims. The combination of the lateral sliding function and the lateral avoidance structure allows the vehicle seat in a limited space to have a larger fore-and-aft sliding range, thus allowing the seat to integrate multiple adjustment functions such as backrest adjustment, seat frame angle adjustment, and leg rest adjustment, meeting the occupant's reclining posture needs and allowing them to fully stretch their body.

[0050] There are two sets of longitudinal slide rail assemblies 810, which are arranged parallel to each other on the vehicle floor X along the front-rear direction of the vehicle. Each longitudinal slide rail assembly 810 includes a longitudinal lower slide rail and a longitudinal upper slide rail that cooperates with it. In a car seat usage scenario, each longitudinal upper slide rail is provided with a strip-shaped slide rail seat 830 extending along its direction. Two sets of transverse slide rail assemblies 820 are fixedly arranged above the two slide rail seats 830, and the two sets of transverse slide rail assemblies 820 are respectively located at both ends of the slide rail seat 830. The front end of the slide rail seat 830 is lower than the rear end, so that the transverse slide rail assembly 820 located at its front end is lower than the transverse slide rail assembly 820 located at its rear end. The transverse slide rail assembly 820 includes a transverse lower slide rail and a transverse upper slide rail that cooperates with it. The two ends of the transverse lower slide rail are respectively connected to the same end of the two slide rail seats 830. A seat support 900 is fixedly installed above the two horizontal upper slide rails. A seat frame is installed above the seat support 900. The upper part of the seat support 900 is kept horizontal so that the seat frame is installed in a horizontal state. At the same time, the lower part of the seat support 900 has a structure that is lower in the front and higher in the back, which complements the two horizontal slide rail assemblies 820 and achieves balance.

[0051] Specifically, such as Figure 12 and 13 As shown, the slide rail base 830 includes a groove-shaped body with an upward opening. This groove-shaped body extends along the length of the longitudinal slide rail assembly 810. The side walls of the groove-shaped body gradually decrease in width from the middle to the front, forming a front mounting portion 831 at the front of the groove-shaped body. Support flanges 833 are formed on the outer sides of the side walls of the groove-shaped body. A rear mounting seat 840 is provided on the rear opening of the groove-shaped body, resting on the support flanges 833, thus making the rear mounting seat 840 higher than the front mounting portion 831. The rear transverse slide rail is bolted to the two rear mounting seats 840, and the front transverse slide rail is bolted to the two front mounting portions 831.

[0052] Thus, as Figure 14 As shown, when the seat slides laterally, the rear lateral sliding rail, due to its higher position, can avoid the floor protrusion Y on the side of the seat. In this scenario, the vehicle seat can achieve multi-directional adjustment within a limited space.

[0053] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention. Those skilled in the art, under the guidance of the present invention, can make various similar representations without departing from the spirit and claims of the present invention, and such modifications all fall within the protection scope of the present invention.

Claims

1. A zero-gravity seat frame for lateral avoidance, comprising a seat frame and a backrest frame, wherein the seat frame includes a first side plate (100) and a second side plate (200) arranged opposite to each other, and the backrest frame includes a first side plate (400) and a second side plate (600) arranged opposite to each other, wherein the first side plate (400) and the first side plate (100) of the seat frame are rotatably connected by a first angle adjuster, and the second side plate (600) and the second side plate (200) of the seat frame are rotatably connected by a second angle adjuster, characterized in that: The lower part of the first side panel (400) of the backrest is offset relative to its upper part toward the second side panel (600) of the backrest, and the rear part of the first side panel (100) of the seat frame is offset relative to its front part toward the second side panel (200) of the seat frame. The first angle adjuster is connected between the lower part of the first side panel (400) of the backrest and the rear part of the first side panel (100) of the seat frame. The first side panel (400) of the backrest includes an upper part of the side panel and an offset part (710). The upper end of the offset part (710) is fixedly connected to the upper part of the side panel. The offset part (710) is offset relative to the upper part of the side panel towards the second side panel (600) of the backrest. A lateral clearance area (401) is formed in the space below the upper part of the side panel directly opposite the offset part (710). The offset part (710) includes the upper connecting plate (711) of the first angle adjuster, the lower outer side of the upper connecting plate (711) is connected to the core component of the angle adjuster, the core component of the angle adjuster is located in the lateral avoidance area (401), and the lower connecting plate (720) of the first angle adjuster is located outside the core component of the angle adjuster. The first side plate (100) of the seat frame includes a front section (101), a middle section (102) and a rear section (103) connected sequentially 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 inside the front section (101), the middle section (102) gradually shifts inward from front to back and connects between the front section (101) and the rear section (103), and the rear section (103) is connected to the lower end of the angle adjuster lower connecting plate (720); The lower end of the second side panel (600) of the backrest is formed with a core component mounting area (610), which is horizontally opposite to the lower end of the upper connecting plate (711) of the angle adjuster; A lower horizontal backrest plate is connected between the lower end of the upper connecting plate (711) of the angle adjuster and the lower end of the lower end of the second side plate (600) of the backrest; The lower connecting plate (720) of the angle adjuster extends from top to bottom and forward at the same time. The middle part of the lower connecting plate (720) of the angle adjuster is bent inward so that its lower part is offset inward relative to its upper part and abuts against the rear section (103). The distance from the lower part of the first side panel (400) of the backrest, the rear part of the first side panel (100) of the seat frame, and the first angle adjuster to the middle plane of the seat is less than the distance from the lower part of the second side panel (600) of the backrest, the second side panel (200) of the seat frame, and the second angle adjuster to the middle plane of the seat on the other side. A longitudinal slide rail assembly (810) is provided below the seat frame, and a transverse slide rail assembly (820) is provided above the longitudinal slide rail assembly (810). The transverse slide rail assembly (820) supports the seat frame through a seat support (900).

2. The zero-gravity seat frame for lateral avoidance according to claim 1, characterized in that: The upper connecting plate (711) of the angle adjuster is strip-shaped. The upper end of the upper connecting plate (711) is attached to the inner side of the upper part of the side plate. The middle part of the upper connecting plate (711) is bent inward so that its lower part is offset inward relative to its upper part. The rear edge of the upper connecting plate (711) of the angle adjuster is integrally formed with an upper connecting plate flange (712); An upper connecting plate (711) of the angle adjuster is provided with an upper connecting plate reinforcing plate (713) attached to its inner side. The upper connecting plate reinforcing plate (713) extends from the upper part of the upper connecting plate (711) of the angle adjuster to its lower part, and the upper connecting plate reinforcing plate (713) is provided with vertically formed reinforcing ribs.

3. A zero-gravity seat frame for lateral avoidance according to claim 2, characterized in that: The upper part of the side plate includes a first side plate outer sheet metal (410) and a first side plate inner sheet metal (420); The first side panel outer sheet metal (410) includes a first outer panel (411), the two sides of which face left and right respectively, and the edge of the first outer panel (411) is connected to a first side panel flange (412) facing the second side panel (600) of the backrest. The first side panel flange (412) is continuously arranged along the front, bottom and rear sides of the first outer panel (411). The inner side of the first outer plate (411) is provided with the first side plate inner sheet metal (420), the first side plate inner sheet metal (420) connects the front and rear sides of the first side plate flange (412), and the inner side of the first side plate inner sheet metal (420) is attached with the upper connecting plate (711) of the angle adjuster.

4. A zero-gravity seat frame for lateral avoidance according to any one of claims 1 to 3, characterized in that: In the horizontal direction, the front section (101) of the first side plate (100) of the seat frame extends backward in a straight line, and the connection part between the middle section (102) and the rear section (103) is recessed to form an upper clearance area (104); The connection between the middle section (102) and the rear section (103) is lower than the corresponding part of the second side panel (600) of the backrest that is directly opposite it.

5. A zero-gravity seat frame for lateral avoidance according to claim 4, characterized in that: A rear horizontal tube (300) of the seat frame is connected between the rear ends of the first side plate (100) and the second side plate (200) of the seat frame to allow the first side plate (100) and the second side plate (200) of the seat frame to rotate relative to the rear horizontal tube (300); The rear end of the rear section (103) is provided with a rear horizontal tube connection hole (105), and the rear horizontal tube (300) of the seat frame is provided inside the rear horizontal tube connection hole (105). The lower connecting plate (720) of the angle adjuster is attached to the outside of the first side plate (100) of the seat frame. An axial connector is rotatably provided on the lower connecting plate (720). The axial connector is inserted into the rear horizontal tube (300) of the seat frame and connected to the rear horizontal tube (300) of the seat frame. The lower connecting plate (720) of the angle adjuster is also provided with another connector. The front part of the rear section (103) has a lower connecting plate connecting hole (106) through which the connector passes, and the connector passes through the lower connecting plate connecting hole (106).

6. A zero-gravity seat frame for lateral avoidance according to claim 5, characterized in that: The axial connecting member is a stepped bolt (320), which includes a screw section, a smooth rod section and a screw head. The screw section passes through the rear horizontal tube (300) of the seat frame and is threaded to it. The smooth rod section passes through the lower connecting plate (720) of the angle adjuster. The screw head limits the lower connecting plate (720) of the angle adjuster from the outside.

7. A zero-gravity seat frame for lateral avoidance according to claim 6, characterized in that: A reinforcing screw sleeve (310) is fixedly installed inside the rear horizontal tube (300) of the seat frame. The reinforcing screw sleeve (310) is concentrically embedded in the end of the rear horizontal tube (300) of the seat frame located in the connecting hole (105) of the rear horizontal tube. The screw section passes through the reinforcing screw sleeve (310), and the two are threaded together. The outer diameter of the screw section is smaller than the outer diameter of the smooth rod section, and the step at the connection between the smooth rod section and the screw section limits the outer side of the first side plate (100) of the seat frame.

Images