Foldable low-posture automobile seat framework

Abstract

The utility model discloses a foldable low-posture automobile seat framework which comprises a backrest framework, a cushion framework, a supporting assembly, an angle adjusting motor assembly and a push rod motor assembly, and the lower end of the backrest framework is hinged to the rear side of the supporting assembly through the angle adjusting motor assembly and is driven by the angle adjusting motor assembly to turn over. The front side of the seat cushion framework is hinged to the front side of the supporting assembly through a front hinge rod, the push rod motor assembly is hinged to the proper position of the front hinge rod, and the front hinge rod is pushed to move so as to drive the front side of the seat cushion framework to conduct height adjustment. The rear side of the cushion framework is arranged in the sliding groove in a sliding mode and slides along the sliding groove. The rear side of the seat cushion framework is arranged in the sliding grooves of the fixing seats in a sliding mode, the two fixing seats are fixed to the supporting assembly, when collision occurs, the rear side of the seat cushion framework only slides along the sliding grooves and cannot be separated from the supporting assembly, and the seat cushion can be prevented from being separated when collision occurs.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to a foldable low-profile automobile seat frame. Background Art

[0002] Seating components and the flexible nature of these seating components are becoming increasingly important in today's world. The value of having an adjustable seating component is that it provides the individual with more working time and greater comfort.

[0003] Compared with traditional fuel vehicles, new energy vehicles currently have more stringent requirements for seat installation space because the batteries are installed in the lower area of ​​the vehicle. At the same time, passengers' requirements for seat comfort are also getting higher and higher.

[0004] Chinese invention patent application publication number CN108688524A discloses a seat assembly including a seat. A seat back is rotatably connected to the seat so as to reach a fully reclined position. A rear seat lifter includes a mechanism disposed below a seat cushion support near the rear of the seat and operable between a lowered position and a raised position. When the seat back is in the fully reclined position, the rear of the seat is raised relative to the seat back to minimize the height difference between the rear of the seat and the bottom of the seat back.

[0005] Chinese utility model patent authorization announcement number CN208248017U discloses a seat assembly for a vehicle, including a seat with an extendable leg support. The seat back is operably connected to the seat. The seat assembly includes a passenger detection system. A rear seat lift is disposed in the seat and is operable between a lowered position and a raised position. When the seat back is in a fully reclined position, the rear of the seat is lifted relative to the seat back to minimize the height difference between the rear of the seat and the bottom of the seat back. The control module communicates with the passenger detection system, the seat, and the seat back. The control module is configured to activate an actuation assembly of the seat back to rotate the seat back rearward, extend the extendable leg support forward, and lift the rear seat lift to provide optimal resting conditions for the passenger.

[0006] The vehicle seat disclosed in the Chinese invention patent application publication number CN111186344A includes: a seat cushion having a seat cushion frame; a seat back having a seat back frame; a lifting device; a tilting mechanism disposed at the upper portion of the rear end of the lifting device and connected to the lower end of the seat back frame; a first link member rotatably disposed between the rear end of the seat cushion frame and the tilting mechanism; a second link member rotatably disposed between the upper portion of the front end of the lifting device and the front end of the seat cushion frame; and a track disposed at the lower portion of the lifting device. In conjunction with the rearward tilting of the seat cushion by the tilting mechanism, the rear end of the seat cushion moves forward and upward by the first link member, and the front end of the seat cushion moves forward and upward by the second link member.

[0007] The improved foldable and reclining seat frame disclosed in China Utility Model Patent Authorization Announcement No. CN218702863U includes a backrest frame and a cushion frame, wherein the cushion frame includes a seat basin, an anti-submarine beam welding assembly, a pair of upper brackets, a driving cross tube welding assembly and a push rod motor assembly; the backrest frame is hinged to the rear ends of the pair of upper brackets, wherein the backrest frame can be adjusted to any angle between folding, reclining and lying flat independently of the seat cushion frame; the left and right ends of the driving cross tube welding assembly are fixedly connected to the rear ends of the pair of upper brackets; the front end of the seat basin is hinged to the upper end of the anti-submarine beam welding assembly, the lower end of the anti-submarine beam welding assembly is hinged to the front end of the pair of upper brackets, the motor in the push rod motor assembly is hinged to the driving cross tube welding assembly, the push rod end of the push rod motor assembly is hinged to the anti-submarine beam welding assembly, and the rear end of the seat basin is connected to the pair of upper brackets in a sliding manner.

[0008] Although the seat of the above patent can be folded and laid back, it is unable to keep the seat cushion at a relatively low position during the entire adjustment process, and it is unable to meet the requirement of new energy vehicles for the seat cushion to occupy less space. Utility Model Content

[0009] In order to meet the requirement of new energy vehicles for less space occupied by seat cushions, the utility model can be implemented through the following technical solutions:

[0010] A foldable low-profile automobile seat frame, comprising a backrest frame, a seat cushion frame, a support assembly, an angle adjustment motor assembly and a push rod motor assembly, wherein the lower end of the backrest frame is hinged to the rear side of the support assembly by means of the angle adjustment motor assembly and is driven to flip by the angle adjustment motor assembly, the front side of the seat cushion frame is hinged to the front side of the support assembly by means of a front hinge rod, the push rod motor assembly is hinged to the front hinge rod at an appropriate position, pushes the front hinge rod to move and thereby drives the front side of the seat cushion frame to adjust its height, and is characterized in that it also comprises at least one fixed seat, a horizontally extending slide groove is provided on the fixed seat, the rear side of the seat cushion frame is slidably arranged in the slide groove and slides along the slide groove.

[0011] In a preferred embodiment of the present invention, the support assembly includes a pair of front support assemblies and a pair of rear support assemblies, and the pair of front support assemblies and the pair of rear support assemblies are respectively fixed on the vehicle body floor or the upper rails of a pair of slide rail assemblies, and the fixing seats are a pair, which are respectively fixed on a pair of rear support assemblies; the front hinged rods are also a pair, and the lower ends of a pair of front hinged rods are hinged on the pair of front support assemblies, and the upper ends of a pair of front hinged rods are hinged on the front side of the seat cushion frame; the lower end of the backrest frame is hinged to the pair of rear support assemblies by relying on the angle adjustment motor assembly.

[0012] In a preferred embodiment of the utility model, a pair of front hinged rods are fixed together by a front cross tube welding assembly; the push rod motor in the push rod motor assembly is hinged on the front cross tube welding assembly, and the push rod end in the push rod motor assembly is hinged on the rear support assembly. The push rod motor is installed in a front manner, which can save space under the seat cushion frame.

[0013] In a preferred embodiment of the present invention, a pair of fixing seats are connected by a rear reinforcing tube.

[0014] In a preferred embodiment of the present invention, the seat cushion frame includes a pair of seat cushion wall panels, a seat basin and a rear tube welding assembly, the seat basin is fixed to the front side of a pair of seat cushion wall panels, and the two ends of the rear tube welding assembly are fixedly connected to the rear side of a pair of seat cushion wall panels; the upper ends of a pair of front hinged rods are respectively hinged to the front sides of a pair of seat cushion wall panels, and the rear sides of a pair of seat cushion wall panels are respectively slidably configured in the slide groove through a step bolt assembly, and the step bolt slides along the slide groove.

[0015] In a preferred embodiment of the present invention, the rear tube welding assembly includes a rear cross tube and a pair of rear hinged rods, one end of the rear hinged rod is connected to the rear cross tube, and the other end is slidably configured in the slide groove through the step bolt assembly and slides along the slide groove.

[0016] In a preferred embodiment of the utility model, the step bolt assembly includes a step bolt, a bushing, a gasket and a nut. The bushing is sleeved on the step shaft of the step bolt and is slidably arranged in the slide groove. The gasket is sleeved on the step shaft of the step bolt and cooperates with the bolt head of the step bolt to axially limit the bushing. The nut is screwed on the step bolt and cooperates with the fixing seat to axially limit the gasket.

[0017] In a preferred embodiment of the present invention, the shape of the bushing can be configured such that a length extending along the direction of the slide slot is greater than a length extending along a direction perpendicular to the slide slot.

[0018] In a preferred embodiment of the present invention, a backrest stroke limit bracket is fixed to a pair of backrest side panels in the backrest frame, and a limit step is provided on a pair of backrest lower connecting plates in the backrest frame. When the backrest frame is flipped forward from the designed position to realize the forward flattening of the backrest frame, the backrest stroke limit bracket contacts the limit step to limit the flattening of the backrest frame.

[0019] In a preferred embodiment of the present invention, a pair of backrest lower connecting plates are respectively fixed to a pair of rear support assemblies.

[0020] In a preferred embodiment of the present invention, the distance between the H point of the backrest frame and the center of the recliner is greater than 50 mm.

[0021] In a preferred embodiment of the present utility model, the front cross tube welding assembly includes a front cross tube and a motor bracket welded to the front cross tube, and the push rod motor in the push rod motor assembly is hinged to the motor bracket.

[0022] In a preferred embodiment of the present utility model, the motor bracket is in a U-shaped structure, and a flip hook is provided on the motor bracket (please supplement the function of the flip hook).

[0023] In a preferred embodiment of the present invention, the angle adjustment motor in the angle adjustment motor assembly and the push rod motor in the push rod motor assembly are both equipped with Hall sensors.

[0024] In a preferred embodiment of the present invention, the angle adjustment motor in the angle adjustment motor assembly and the push rod motor in the push rod motor assembly are controlled by a switch.

[0025] Due to the adoption of the above technical solution, the utility model slides the rear side of the seat cushion frame in the slide groove of the fixed seat, and the two fixed seats are fixed on the support assembly. When a collision occurs, the rear side of the seat cushion frame only slides along the slide groove and will not separate from the support assembly, thereby preventing the seat cushion from separating when a collision occurs.

[0026] The backrest frame of the foldable low-profile car seat frame can be flipped backward 60-70° at the designed position by relying on the angle adjustment motor assembly, and combined with the seat cushion to form a bed. In addition, the motor is equipped with a Hall sensor, and the seat cushion frame can be moved forward and downward with one click through the control switch. The backrest frame flips forward 97° from the designed position to achieve the forward flattening of the backrest frame and the rotation point of the backrest frame does not affect the comfort (H point Z is 45mm downward). In addition, the block value can be achieved to 210mm under the premise of ensuring that the seat cushion frame has a forward stroke of 185mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The utility model is a simplified motion diagram of a foldable low-profile automobile seat frame in a folded state.

[0028] Figure 2 The utility model is a movement diagram of the foldable low-profile automobile seat frame in a normal sitting position.

[0029] Figure 3 The utility model is a simplified motion diagram of a foldable low-profile automobile seat frame in a rear-lying state.

[0030] Figure 4 The utility model is a simplified motion diagram of a foldable low-profile automobile seat frame in a state of lying flat to form a bed.

[0031] Figure 5 The utility model is a schematic diagram of a seat having a foldable low-profile automobile seat frame in a normal seat posture.

[0032] Figure 6 It is a schematic diagram of a seat with a foldable low-profile automobile seat frame of the utility model being transformed into a bed with one click.

[0033] Figure 7 The present invention is a schematic diagram of a seat having a foldable low-profile automobile seat frame in a folded posture.

[0034] Figure 8 The second schematic diagram is a seat with a foldable low-profile automobile seat frame of the utility model in a folded posture.

[0035] Fig. 9 This is one of the three-dimensional schematic diagrams of the foldable low-profile automobile seat frame of the utility model installed on the slide rail assembly.

[0036] Fig.10 This is the second stereoscopic schematic diagram of the foldable low-profile automobile seat frame of the utility model installed on the slide rail assembly.

[0037] Fig.11 This is a top view of the foldable low-profile automobile seat frame of the utility model installed on the slide rail assembly.

[0038] Fig.12 This is the third stereoscopic schematic diagram of the foldable low-profile automobile seat frame of the utility model installed on the slide rail assembly (the seat basin is not shown).

[0039] Fig.13 The utility model is a schematic diagram of an exploded view of a foldable low-profile automobile seat frame.

[0040] Fig.14 The utility model is a schematic diagram of the exploded backrest frame of the foldable low-profile automobile seat frame.

[0041] Fig.15 The utility model is a schematic diagram of the exploded view of the support assembly, the slide rail assembly and the fixing seat in the foldable low-profile automobile seat frame.

[0042] Fig.16 The utility model is a schematic diagram of the overall decomposition of the seat cushion wall plate and the rear tube welding in the foldable low-profile automobile seat frame.

[0043] Fig.17 The utility model is a schematic diagram of the assembly of the front hinge rod and the front cross tube welding assembly in the foldable low-profile automobile seat frame.

[0044] Fig.18 The utility model is a schematic structural diagram of a front cross tube welding assembly in a foldable low-profile automobile seat frame.

[0045] Fig.19 The utility model is a schematic structural diagram of a rear tube welding assembly in a foldable low-profile automobile seat frame.

[0046] Fig. 20 The utility model is a schematic diagram of the seat basin structure in the foldable low-profile automobile seat frame.

[0047] Fig.21 The utility model is a schematic diagram of the installation of a push rod motor assembly in a foldable low-profile automobile seat frame.

[0048] Fig. 22 The utility model is a schematic diagram of the assembly of the step bolt assembly and the fixing seat in the foldable low-profile automobile seat frame.

[0049] Fig.23 The utility model is a schematic diagram of an exploded view of a step bolt assembly in a foldable low-profile automobile seat frame.

[0050] Fig.24 The utility model is a schematic diagram of a bushing in a foldable low-profile automobile seat frame sliding in a slide groove on a fixed seat.

[0051] Fig.25The utility model is a schematic diagram of a foldable low-profile automobile seat frame in a folded state.

[0052] Fig.26 It is a schematic diagram of the foldable low-profile automobile seat frame of the utility model in a normal sitting position.

[0053] Fig. 27 The utility model is a schematic diagram of a foldable low-profile automobile seat frame in a rear-lying state.

[0054] Fig.28 The utility model is a schematic diagram of a foldable low-profile automobile seat frame in a lying-flat state to form a bed. DETAILED DESCRIPTION

[0055] The present invention is further described below in conjunction with the accompanying drawings and specific implementations.

[0056] See also Figures 1 to 6 and Figure 25 to Figure 28 A foldable low-profile automobile seat frame shown in the figure includes a backrest frame 100, a seat cushion frame 200, a support assembly 300, an angle adjustment motor assembly 400 and a push rod motor assembly 500.

[0057] The lower end of the backrest frame 100 is hinged to the rear side of the support assembly 300 by means of the angle adjustment motor assembly 400 and is driven by the angle adjustment motor assembly 400 to flip between a normal sitting position, a reclining position, and a lying flat position.

[0058] The front side of the seat cushion frame 200 is hinged to the front side of the support assembly 300 through the front hinge rod 600. The push rod motor assembly 500 is hinged to the front hinge rod 600 at an appropriate position, such as the middle position, to push the front hinge rod 600 to move and thereby drive the front side of the seat cushion frame 200 to adjust its height.

[0059] That is to say, the backrest frame 100 and the seat cushion frame 200 are driven separately, the backrest frame 100 is driven by the angle adjustment motor assembly 400 to flip, and the seat cushion frame 200 is driven by the push rod motor assembly 500 to move up and down.

[0060] See also Figures 7 to 24 The main features of the utility model are: it also includes a pair of fixed seats 700a, 700b, each of which is provided with a horizontally extending slide groove 710a, 710b, the rear side of the seat cushion frame 200 is slidably arranged in the slide groove 710 and slides along the slide grooves 710a, 710b, the two fixed seats 710a, 710b are fixed on the support assembly 300, when a collision occurs, the rear side of the seat cushion frame 200 only slides along the slide grooves 710a, 710b, and will not separate from the support assembly, which can prevent the seat cushion from separating when a collision occurs.

[0061] The support assembly 300 of the utility model includes a pair of front support assemblies 310a, 310b and a pair of rear support assemblies 320a, 320b, which are respectively fixed on the vehicle body floor or the upper rails 810a, 810b of a pair of slide rail assemblies 800a, 800b. A pair of fixing seats 700a, 700b are respectively fixed on the pair of rear support assemblies 320a, 320b. At the same time, the pair of fixing seats 700a, 700b are connected by a rear reinforcing pipe 720 to increase the strength.

[0062] The seat cushion frame 200 includes a pair of seat cushion wall panels 210a, 210b, a seat basin 220 and a rear pipe welding assembly 230. The seat basin 220 is fixed to the front side of the pair of seat cushion wall panels 210a, 210b by welding, and the two ends of the rear pipe welding assembly 230 are fixedly connected to the pair of seat cushion wall panels 210a, 210b by riveting.

[0063] See especially Fig.19 The rear tube welding assembly 230 includes a rear cross tube 233 and a pair of rear hinged rods 231, 232. One end of the pair of rear hinged rods 231, 232 is connected to the rear cross tube 233, and the other end is fixed with a step bolt assembly 231a, 232a. The step bolt assembly 231a, 232a is fixedly connected to a pair of seat cushion wall panels 210a, 210b by riveting.

[0064] In order to allow the rear side of the seat cushion frame 200 to slide in the slide groove 710 and slide along the slide grooves 710a and 710b, a set of step bolt assemblies 900 are anchored at the rear side of a pair of seat cushion wall panels 210a and 210b. Figure 22 to Figure 24 The step bolt assembly 900 includes a step bolt 910, a bushing 920, a washer 930 and a nut (not shown in the figure).

[0065] The shape of the bushing 920 can be configured so that the length extending along the direction of the slide grooves 710a, 710b is greater than the length extending in the direction perpendicular to the slide grooves 710a, 710b, such as an elliptical shape, to prevent the bushing 920 from deflecting during the forward sliding of the seat cushion; the bushing 920 is sleeved on the step shaft 911 of the step bolt 910 and is slidably configured in the slide grooves 710a, 710b, and the gasket 930 is also sleeved on the step shaft 911 of the step bolt 910 and cooperates with the bolt head 912 of the step bolt 910 to axially limit the bushing 920. The nut is screwed on the step bolt 910 and cooperates with the fixing seats 700a, 700b to axially limit the gasket 930, and the end face of the gasket 930 slides and rubs with the fixing seats 700a, 700b.

[0066] See also Fig.17 and Fig.18 The front hinge rods 600 are also a pair, and the pair of front hinge rods 600 are anchored together by a front cross tube welding assembly 610. The front cross tube welding assembly 610 includes a front cross tube 611 and a pair of motor brackets 612 welded to the front cross tube 611. The motor brackets 612 are U-shaped structures, and a flip hook 612a is provided on the motor brackets. The push rod motor 510 in the push rod motor assembly 500 is hinged on the motor bracket 612, so that the push rod motor 510 in the push rod motor assembly 500 is placed in front, freeing up space under the seat cushion frame 200 for installing other parts.

[0067] The lower ends of a pair of front hinged rods 600 are hinged on a pair of front support assemblies 310a, 310b, and the upper ends are hinged on a pair of seat cushion wall panels 210a, 210b. In this way, when the push rod motor assembly 500 drives the pair of front hinged rods 600 to move, the pair of front hinged rods 600 drive the pair of seat cushion wall panels 210a, 210b to rise and fall, thereby driving the entire seat cushion frame 200 to rise and fall.

[0068] In order to drive a pair of front hinged rods 600 to move, the end of the push rod 520 in the push rod motor assembly 500 is fixed to the rear support assemblies 320a and 320b, so that when the push rod motor 510 in the push rod motor assembly 500 is working, it can drive a pair of front hinged rods 600 to move.

[0069] In addition, according to actual needs, multiple push rod motors 510 can be arranged, connected to the front hinge rod 600 or the motor bracket 612 using the same fixing method, and the ends are connected to the rear support components 320a, 320b.

[0070] The backrest frame 100 includes a pair of backrest side panels 110a, 110b, an upper backrest curved pipe 120, a pair of lower backrest connecting plates 130a, 130b, a lower backrest horizontal plate 140, and a pair of headrest mounting metal pipes 150. The two ends of the upper backrest curved pipe 120 are welded and fixedly connected to the upper ends of a pair of backrest side panels 110a, 110b, and a pair of headrest mounting metal pipes 150 are welded to the upper backrest curved pipe 120 at intervals for mounting headrests.

[0071] A pair of backrest lower connecting plates 130a, 130b are respectively hinged to the lower ends of a pair of backrest side plates 110a, 110b through a recliner 410, and the lower ends of the pair of backrest side plates 110a, 110b are connected together through the backrest lower cross plate 140. The two recliners 410 are linked by a synchronization rod 420, and the synchronization rod 420 is driven to rotate by a recliner motor 430, and the rotating synchronization rod 420 drives the two recliners 410 to move.

[0072] The pair of backrest lower connecting plates 130a, 130b are respectively fixed to the pair of rear support assemblies 320a, 320b by fasteners.

[0073] See especially Fig.26 The distance L between the H point of the backrest frame 100 and the center of the recliner 410 is greater than 50 mm, so that the H point of the backrest frame 100 just supports the waist of the occupant, increasing the comfort.

[0074] When the backrest frame 100 is limited when being flattened, a backrest stroke limiting bracket 160a, 160b is fixed on a pair of backrest side plates 110a, 110b, and a limiting step 131a, 131b is arranged on a pair of backrest lower connecting plates 130a, 130b. When the backrest frame 100 is flipped forward 97° from the designed position to realize the backrest frame 100 being flattened forward, the backrest stroke limiting bracket 160a, 160b contacts the limiting steps 131a, 131b to limit the flattening of the backrest frame 100.

[0075] The angle adjustment motor 430 in the angle adjustment motor assembly 400 and the push rod motor 510 in the push rod motor assembly 500 of the utility model are both equipped with Hall sensors and controlled by a switch (not shown in the figure), so that the vehicle can be turned flat with one key (see Figure 7 ) and one-touch bed (see Figure 6 ).

[0076] See especially Figures 5 to 7 The backrest, i.e. the backrest frame 100, is electrically folded forward 90-97.5° until the backrest is in a flat state at 0°. After the backrest is folded flat, the field of vision of the rear passengers can be widened. The backrest backboard after being folded flat can provide an area for the rear passengers to put their feet or hold items. At this time, the seat cushion, i.e. the seat cushion frame 200, can be moved forward by more than 185mm driven by the push rod motor assembly 500. On the premise of ensuring that the forward distance of the seat cushion frame 200 is large enough, the Block value can be as small as 200mm. By reducing the forward movement distance of the seat cushion frame 200, the Block value can continue to decrease accordingly.

Claims

1. A foldable low-profile automobile seat frame, comprising a backrest frame, a seat cushion frame, a support assembly, an angle adjustment motor assembly and a push rod motor assembly, wherein the lower end of the backrest frame is hinged to the rear side of the support assembly by the angle adjustment motor assembly and is driven to flip by the angle adjustment motor assembly, the front side of the seat cushion frame is hinged to the front side of the support assembly by a front hinge rod, the push rod motor assembly is hinged to the front hinge rod, pushes the front hinge rod to move, and then drives the front side of the seat cushion frame to adjust its height, characterized in that: It also includes at least one fixing seat, on which a sliding groove extending in a horizontal shape is arranged, and the rear side of the seat cushion frame is slidably arranged in the sliding groove and slides along the sliding groove.

2. A foldable low-profile car seat frame according to claim 1, characterized in that: The support assembly includes a pair of front support assemblies and a pair of rear support assemblies, and the pair of front support assemblies and the pair of rear support assemblies are respectively fixed on the vehicle body floor or the upper rails of a pair of slide rail assemblies, and the fixing seats are a pair, which are respectively fixed on the pair of rear support assemblies; the front hinged rods are also a pair, and the lower ends of the pair of front hinged rods are hinged on the pair of front support assemblies, and the upper ends of the pair of front hinged rods are hinged on the front side of the seat cushion frame; the lower end of the backrest frame is hinged to the pair of rear support assemblies by relying on the angle adjustment motor assembly.

3. A foldable low-profile automobile seat frame according to claim 2, characterized in that: A pair of front hinged rods are fixed together through a front cross tube welding assembly; a push rod motor in the push rod motor assembly is hinged on the front cross tube welding assembly, and a push rod end in the push rod motor assembly is hinged on the rear support assembly.

4. A foldable low-profile automobile seat frame according to claim 3, characterized in that: A pair of fixing seats are connected through a rear reinforcement pipe.

5. A foldable low-profile automobile seat frame according to any one of claims 3 or 4, characterized in that: The seat cushion frame includes a pair of seat cushion wall panels, a seat basin and a rear tube welding assembly, the seat basin is fixed to the front side of a pair of seat cushion wall panels, and the two ends of the rear tube welding assembly are fixedly connected to the rear side of a pair of seat cushion wall panels; the upper ends of a pair of front hinged rods are respectively hinged to the front sides of a pair of seat cushion wall panels, and the rear sides of a pair of seat cushion wall panels are respectively slidably configured in the slide groove through a step bolt assembly, and the step bolt slides along the slide groove.

6. A foldable low-profile automobile seat frame according to claim 5, characterized in that: The rear tube welding assembly includes a rear cross tube and a pair of rear hinged rods, one end of the rear hinged rod is connected to the rear cross tube, and the other end is slidably arranged in the slide groove through the step bolt assembly and slides along the slide groove.

7. A foldable low-profile automobile seat frame according to claim 5, characterized in that: The step bolt assembly includes a step bolt, a bushing, a gasket and a nut. The bushing is sleeved on the step shaft of the step bolt and is slidably arranged in the slide groove. The gasket is sleeved on the step shaft of the step bolt and cooperates with the bolt head of the step bolt to axially limit the bushing. The nut is screwed on the step bolt and cooperates with the fixing seat to axially limit the gasket.

8. A foldable low-profile automobile seat frame according to claim 7, characterized in that: The bushing may be configured such that a length extending in a direction of the slide slot is greater than a length extending in a direction perpendicular to the slide slot.

9. A foldable low-profile automobile seat frame according to claim 5, characterized in that: A backrest stroke limiting bracket is fixed on a pair of backrest side panels in the backrest frame, and a limiting step is arranged on a pair of backrest lower connecting plates in the backrest frame. When the backrest frame is flipped forward from the designed position to realize the backrest frame being flattened forward, the backrest stroke limiting bracket contacts the limiting step to limit the flattening of the backrest frame.

10. A foldable low-profile automobile seat frame according to claim 9, characterized in that: A pair of backrest lower connecting plates are respectively fixed on a pair of rear supporting assemblies.

11. A foldable low-profile automobile seat frame according to claim 5, characterized in that: The distance between the H point of the backrest frame and the center of the recliner is greater than 50 mm.

12. A foldable low-profile automobile seat frame according to claim 5, characterized in that: The front cross tube welding assembly comprises a front cross tube and a motor bracket welded on the front cross tube, and the push rod motor in the push rod motor assembly is hinged on the motor bracket.

13. The foldable low-profile automobile seat frame according to claim 1, characterized in that: The angle adjustment motor in the angle adjustment motor assembly and the push rod motor in the push rod motor assembly are both equipped with Hall sensors.

14. A foldable low-profile automobile seat frame according to claim 13, characterized in that: The angle adjustment motor in the angle adjustment motor assembly and the push rod motor in the push rod motor assembly are controlled by a switch.

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