A method for adjusting a foldable and reclining seat frame, the seat frame, and the seat.

Abstract

This invention discloses a method for adjusting a foldable and reclining seat frame, comprising a seat frame including a backrest frame and a seat cushion frame. The backrest frame is hinged to the seat cushion frame. The backrest frame is characterized by being angle-adjustable relative to the seat cushion frame by an angle-adjusting motor assembly, and the seat cushion frame is height-adjustable by a push-rod motor assembly. This invention also discloses a foldable and reclining seat frame and a seat. This invention possesses three functions: foldable, reclining, and flat reclining, and can be adjusted and fixed in any position between folding and reclining to meet usage requirements.

Description

Technical Field

[0001] This invention relates to the field of seating technology, and in particular to a method for adjusting a foldable and reclining seat frame, as well as a seat frame and seat. Background Technology

[0002] Seating components and their flexibility are becoming increasingly important in today's world. The value of adjustable seating components lies in providing individuals with more work time and greater comfort. Some seating components include upper chest support that can be adjusted between fore-and-aft positions. Aesthetically pleasing upper back support that is consistent with the rest of the seat and is typically seamless offers value to consumers.

[0003] Chinese patent application CN201810257028.1 discloses a seat assembly including a seat. The seat back is rotatably connected to the seat to reach a fully reclined position. The rear seat lifting device 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.

[0004] Chinese patent application CN201820270607.5 discloses a seat assembly for a vehicle, including a seat with extendable leg support. A 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 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 raised relative to the seat back to minimize the height difference between the rear of the seat and the bottom of the seat back. A 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 raise the rear seat lift to provide optimal resting conditions for the passenger.

[0005] Chinese patent application CN201910987271.3 discloses a vehicle seat, comprising: a seat cushion having a seat cushion frame; a seat back having a backrest frame; a lifting device; a tilting mechanism disposed at the upper rear end of the lifting device and connected to the lower end of the backrest frame; a first linkage member rotatably disposed between the rear end of the seat cushion frame and the tilting mechanism; a second linkage member rotatably disposed between the upper front end of the lifting device and the front end of the seat cushion frame; and a track disposed at the lower part of the lifting device. In conjunction with tilting the seat cushion backward using the tilting mechanism, the rear end of the seat cushion moves forward and upward using the first linkage member, and the front end of the seat cushion moves forward and upward using the second linkage member. This patent application can provide a flat, tilted posture that is substantially parallel to the vehicle floor.

[0006] Existing products either have a manual backrest folding function or a separate seat frame lifting function, but none combine both functions; in addition, there is currently a problem of poor lumbar comfort when the backrest is reclined at a large angle. Summary of the Invention

[0007] One of the technical problems to be solved by the present invention is to provide a foldable and reclining seat frame adjustment method that has three functions: foldable, reclining, and flat reclining, in order to address the shortcomings of the prior art.

[0008] The second technical problem to be solved by the present invention is to provide a foldable and reclining seat frame with three functions: foldable, reclining, and flat reclining.

[0009] The third technical problem to be solved by the present invention is to provide a seat comprising the above-mentioned seat frame.

[0010] To achieve the aforementioned objectives, the present invention provides a foldable and reclining seat frame adjustment method, comprising a seat frame including a backrest frame and a seat cushion frame. The backrest frame is hinged to the seat cushion frame. The backrest frame is angled relative to the seat cushion frame by an angle-adjusting motor assembly, and the seat cushion frame is height-adjusted by a push-rod motor assembly. The adjustment method of the seat frame is as follows:

[0011] The backrest frame is driven by the angle adjustment motor assembly to flip forward from its initial position to the folded position with the seat cushion frame;

[0012] Alternatively, the backrest frame can be flipped backward from its initial position to a lying position by the angle adjustment motor assembly, and the seat cushion frame can be lifted to its highest position by the push rod motor assembly.

[0013] Alternatively, the backrest frame can be rotated backward from its initial position to a reclining position by the angle adjustment motor assembly. Before the backrest frame is rotated backward to a certain angle by the angle adjustment motor assembly, the seat cushion frame is fixed in height and does not rise. When the backrest frame is rotated backward to a certain angle by the angle adjustment motor assembly, the seat cushion frame begins to be driven by the push rod motor assembly to rise in height and changes synchronously and regularly with the angle of the backrest frame, and vice versa.

[0014] In a preferred embodiment of the present invention, under no-load conditions, the push rod motor assembly is a low-thrust push rod motor assembly; the backrest frame is driven by the angle adjustment motor assembly to flip forward from its initial position to a folded position with the seat cushion frame; or the backrest frame is driven by the angle adjustment motor assembly to flip backward from its initial position to a reclining position, while the seat cushion frame is simultaneously raised to its highest position by the low-thrust push rod motor assembly; or the backrest frame is driven by the angle adjustment motor assembly to flip backward from its initial position to a reclining position. Before the backrest frame is flipped backward to a certain angle by the angle adjustment motor assembly, the seat cushion frame remains at a fixed height. When the backrest frame is flipped backward to a certain angle by the angle adjustment motor assembly, the seat cushion frame begins to be raised in height by the low-thrust push rod motor assembly and changes synchronously and regularly with the angle of the backrest frame, and vice versa.

[0015] In a preferred embodiment of the present invention, under load, the push rod motor assembly is a high-thrust push rod motor assembly; the backrest frame is driven by the angle adjustment motor assembly to flip forward from its initial position to a folded position with the seat cushion frame; or the backrest frame is driven by the angle adjustment motor assembly to flip backward from its initial position to a reclining position, while the seat cushion frame is driven by the high-thrust push rod motor assembly to raise its height to its highest position; or the backrest frame is driven by the angle adjustment motor assembly to flip backward from its initial position to a reclining position. Before the backrest frame is flipped backward to a certain angle, the seat cushion frame remains at a fixed height. When the backrest frame is flipped backward to a certain angle, the seat cushion frame begins to be raised by the high-thrust push rod motor assembly and its height changes synchronously and regularly with the angle of the backrest frame, and vice versa.

[0016] In a preferred embodiment of the present invention, the initial position of the backrest frame is a position where the angle between the backrest frame and the seat cushion frame is 115°±3°, the folded position of the backrest frame and the seat cushion frame is a position where the angle between the backrest frame and the seat cushion frame is 0°±3°, and the reclining position of the backrest frame is a position where the angle between the backrest frame and the seat cushion frame is 162°±3°.

[0017] In a preferred embodiment of the present invention, the angle is a position where the included angle between the backrest frame and the seat cushion frame is 125°±3°.

[0018] In a preferred embodiment of the present invention, the height of the seat cushion frame, driven by the push rod motor assembly, begins to rise in a synchronized and regular manner with the change in the angle of the backrest frame, meaning that: when the angle between the backrest frame and the seat cushion frame is adjusted between 125°±3° and 142°±3°, the height of the seat cushion frame changes by 0.5mm for every 1° change in the backrest frame; when the angle between the backrest frame and the seat cushion frame is adjusted between 142°±3° and 154°±3°, the height of the seat cushion frame changes by 1.2mm for every 1° change in the backrest frame; and when the angle between the backrest frame and the seat cushion frame is adjusted between 154°±3° and 162°±3°, the height of the seat cushion frame changes by 3mm for every 1° change in the backrest frame.

[0019] As a second aspect of the present invention, a foldable and reclining seat frame includes a backrest frame and a seat cushion frame, wherein the backrest frame is hinged to the seat cushion frame, wherein the backrest frame is driven by an angle adjustment motor assembly to adjust its angle relative to the seat cushion frame, and the seat cushion frame is driven by the push rod motor assembly to adjust its height.

[0020] In a preferred embodiment of the present invention, the backrest frame includes a pair of backrest side panels, an upper backrest curved tube, and a lower backrest horizontal plate. The tops of the pair of backrest side panels are fixedly connected to the left and right ends of the upper backrest curved tube, and the bottoms of the pair of backrest side panels are fixedly connected to the left and right ends of the lower backrest horizontal plate. The seat frame includes a seat basin, a pair of seat basin side longitudinal beams, an anti-submersion crossbeam welding assembly, a pair of front connecting swing arms, a rear drive crossbeam welding assembly, a pair of seat frame side panels, a pair of lower backrest connecting plates, and a rear crossbeam. The front portions of the pair of seat basin side longitudinal beams are fixed to the left and right sides of the seat basin. The anti-submersion crossbeam welding assembly includes an anti-submersion tube and a pair of anti-submersion tube connecting plates fixed to the left and right sides of the anti-submersion tube. The pair of anti-submersion tube connecting plates are fixedly connected to the pair of seat basin side longitudinal beams at appropriate positions. The rear drive crossbeam welding assembly includes a rear drive crossbeam and a pair of rear drive crossbeam connecting plates fixed to the left and right sides of the rear drive crossbeam. The rear ends of the pair of seat basin side longitudinal beams are fixedly connected to the pair of seat basin side longitudinal beams at appropriate positions. The left and right ends of the rear drive cross tube connecting plate are hinged, and the pair of rear drive cross tube connecting plates are also hinged to the rear sides of the pair of seat frame side plates respectively; the left and right ends of the rear cross tube are fixedly connected to the rear sides of the pair of seat frame side plates respectively; one end of the pair of front connecting swing arms is hinged to the front part of the pair of seat basin side longitudinal beams respectively, and the other end of the pair of front connecting swing arms is hinged to the front side of the pair of seat frame side plates respectively; the lower ends of the pair of backrest lower connecting plates are fixedly connected to the rear sides of the pair of seat frame side plates respectively; the angle adjustment motor assembly includes an angle adjustment drive motor, a synchronizing rod, and a pair of angle adjusters, the pair of angle adjusters respectively hinge the bottom of the pair of backrest side plates to the upper ends of the pair of backrest lower connecting plates and can adjust the angle of the backrest frame, the angle adjustment drive motor synchronously drives the pair of angle adjusters through the synchronizing rod; the push rod motor assembly includes a push rod drive motor and a lead screw mechanism driven by the push rod drive motor, the lead screw in the lead screw mechanism is hinged to the rear drive cross tube.

[0021] In a preferred embodiment of the present invention, the push rod drive motor is a low-thrust drive motor under no-load conditions; and the push rod drive motor is a high-thrust drive motor under no-load conditions.

[0022] In a preferred embodiment of the present invention, the push rod drive motor is fixed to any side plate of the seat frame, or the high-thrust push rod drive motor is fixed to the bottom surface of the seat basin.

[0023] In a preferred embodiment of the present invention, the backrest frame further includes a pair of headrest mounting tubes fixed to the curved tubes on the backrest.

[0024] In a preferred embodiment of the present invention, a backrest travel limiting bracket is installed on each of a pair of backrest lower connecting plates. When the backrest frame is driven to flip backward to a reclining position by the angle adjustment motor assembly, each backrest travel limiting bracket contacts each backrest side plate to restrict the backrest frame to the reclining position.

[0025] As a third aspect of the present invention, the seat includes the aforementioned seat frame.

[0026] Thanks to the above technical solution, this invention offers three functions: foldable, reclining, and flat. It allows for adjustment and fixation in any position between the initial and reclining positions to meet various usage requirements. This invention limits the reclining position of the backrest frame to an angle of 162°±3° between the backrest frame and the seat cushion frame, while correspondingly raising the seat cushion frame to a suitable position, thus solving the problem of lumbar support when reclining at a large angle. Furthermore, folding the backrest expands the field of vision for rear passengers, and the backrest panel provides a platform for rear passengers to place their feet or store items.

[0027] In summary, this invention simultaneously meets customers' requirements for seat folding and solves the problem of poor lumbar support comfort after large-angle backrest adjustment. Furthermore, this invention has fewer parts; among several solutions, it has the simplest number of parts and manufacturing process, resulting in a lower price and market competitiveness. The comfort adaptability of this invention during adjustment is variable, making it suitable for various vehicle ergonomic layouts. Attached Figure Description

[0028] Figure 1 This is a side view of the seat of the present invention in its initial position.

[0029] Figure 2 This is a side view of the seat of the present invention in the folded position.

[0030] Figure 3 This is a side view of the seat of the present invention in a lying position.

[0031] Figure 4 This is a side view (normal sitting position) of the seat back of the present invention when the angle between the backrest and the seat cushion is 125°±3°.

[0032] Figure 5 This is a side view of the seat of the present invention in a reclining position.

[0033] Figure 6 This is a schematic diagram illustrating the adjustment of the backrest in the seat of the present invention, with the angle between the backrest and the seat cushion ranging from 125°±3° to 142°±3°.

[0034] Figure 7 This is a schematic diagram illustrating the adjustment of the backrest in the seat of the present invention, with the included angle between the backrest and the seat cushion ranging from 142°±3° to 154°±3°.

[0035] Figure 8 This is a schematic diagram illustrating the adjustment of the backrest in the seat of the present invention, with the included angle between the backrest and the seat cushion ranging from 154°±3° to 162°±3°.

[0036] Figure 9 This is a schematic diagram illustrating the rate of change in the adjustment between the backrest angle and the seat cushion height in the seat of the present invention.

[0037] Figure 10 This is a logic diagram showing the adjustment control between the backrest angle and the seat cushion height in the seat of the present invention.

[0038] Figure 11 This is a simplified schematic diagram of the seat frame of the present invention in a folded state (the push rod motor assembly is a small-force push rod motor assembly).

[0039] Figure 12 This is a schematic diagram of the seat frame of the present invention in a folded state (the push rod motor assembly is a small-force push rod motor assembly).

[0040] Figure 13 This is a simplified schematic diagram of the seat frame of the present invention in a lying position (the push rod motor assembly is a small-force push rod motor assembly).

[0041] Figure 14 This is a schematic diagram of the seat frame of the present invention in a flat position (the push rod motor assembly is a small-force push rod motor assembly).

[0042] Figure 15 This is a simplified schematic diagram of the seat frame of the present invention in a normal sitting posture (the push rod motor assembly is a small-force push rod motor assembly).

[0043] Figure 16 This is a schematic diagram of the seat frame of the present invention in a normal sitting posture (the push rod motor assembly is a small-force push rod motor assembly).

[0044] Figure 17 This is a simplified schematic diagram of the seat frame of the present invention in a reclining position (the push rod motor assembly is a low-thrust push rod motor assembly).

[0045] Figure 18 This is a schematic diagram of the seat frame of the present invention in a reclining position (the push rod motor assembly is a low-thrust push rod motor assembly).

[0046] Figure 19 This is a simplified schematic diagram of the seat frame adjustment of the present invention (the push rod motor assembly is a small-force push rod motor assembly).

[0047] Figure 20 This is a simplified schematic diagram of the seat frame of the present invention in a folded state (the push rod motor assembly is a high-thrust push rod motor assembly).

[0048] Figure 21 This is a schematic diagram of the seat frame of the present invention in a folded state (the push rod motor assembly is a high-thrust push rod motor assembly).

[0049] Figure 22This is a simplified schematic diagram of the seat frame of the present invention in a lying position (the push rod motor assembly is a high-thrust push rod motor assembly).

[0050] Figure 23 This is a schematic diagram of the seat frame of the present invention in a flat position (the push rod motor assembly is a high-thrust push rod motor assembly).

[0051] Figure 24 This is a simplified schematic diagram of the seat frame of the present invention in a normal sitting posture (the push rod motor assembly is a high-thrust push rod motor assembly).

[0052] Figure 25 This is a schematic diagram of the seat frame of the present invention in a normal sitting posture (the push rod motor assembly is a high-thrust push rod motor assembly).

[0053] Figure 26 This is a simplified schematic diagram of the seat frame of the present invention in a reclining position (the push rod motor assembly is a high-thrust push rod motor assembly).

[0054] Figure 27 This is a schematic diagram of the seat frame of the present invention in a reclining position (the push rod motor assembly is a high-thrust push rod motor assembly).

[0055] Figure 28 This is a schematic diagram of the seat frame structure of the present invention (the push rod motor assembly is a small-force push rod motor assembly).

[0056] Figure 29 This is an exploded view of the seat frame of the present invention (the push rod motor assembly is a small-force push rod motor assembly).

[0057] Figure 30 This is a schematic diagram of the backrest frame structure of the present invention (the push rod motor assembly is a small-force push rod motor assembly).

[0058] Figure 31 This is an exploded view of the backrest frame, the angle adjustment motor assembly, and a pair of lower backrest connecting plates of the present invention.

[0059] Figure 32 This is a schematic diagram showing the assembled components of the seat basin, a pair of seat basin side longitudinal beams, and anti-submersion crossbeam in the seat cushion frame of the present invention (the push rod motor assembly is a small-force push rod motor assembly).

[0060] Figure 33 This is a schematic diagram of the assembly process between the seat basin, a pair of seat basin side longitudinal beams, and anti-submersion crossbeam welding components in the seat cushion frame of the present invention (the push rod motor assembly is a small thrust push rod motor assembly).

[0061] Figure 34 This is a schematic diagram showing the assembly of a pair of seat frame side plates and the rear cross tube in the seat cushion frame of the present invention (the push rod motor assembly is a small-force push rod motor assembly).

[0062] Figure 35 This is a schematic diagram of the assembly process between a pair of seat frame side plates and the rear cross tube in the seat cushion frame of the present invention.

[0063] Figure 36 This is a schematic diagram of the assembly process of the seat frame of the present invention (the push rod motor assembly is a small-force push rod motor assembly).

[0064] Figure 37 This is a schematic diagram of the installation of the small-thrust push rod motor assembly of the present invention.

[0065] Figure 38 This is a schematic diagram of one installation position of the small-thrust push rod motor assembly of the present invention.

[0066] Figure 39 This is a schematic diagram of one installation position of the high-thrust push rod motor assembly of the present invention. Detailed Implementation

[0067] The present invention will now be described in conjunction with the accompanying drawings and specific embodiments.

[0068] The seat of the present invention includes a seat cushion A and a backrest B, wherein the seat cushion A includes a seat cushion frame 100 and a seat cushion disposed on the seat cushion frame 100, and the backrest B includes a backrest frame 200 and a backrest cushion disposed on the backrest frame 200.

[0069] The seat frame 100 and the backrest frame 200 constitute the seat frame of the present invention. It is basically the same as the existing seat frame. The backrest frame 200 is also hinged to the rear side of the seat frame 100, and the backrest frame 200 can flip back and forth relative to the seat frame 100.

[0070] The key technical point of this invention is that the backrest frame 200 and the seat cushion frame 100 are driven independently. That is, for the backrest frame 200 to flip, there are two types of push rod motor assemblies that drive the seat cushion frame 100 to lift: a high-thrust push rod motor assembly 500 and a low-thrust push rod motor assembly 400. The high-thrust push rod motor assembly 500 is used in functional adjustment scenarios with load requirements (i.e., a person sits on the seat to make adjustments), while the low-thrust push rod motor assembly 400 is used in functional adjustment scenarios without load requirements (i.e., a person does not sit on the seat to make adjustments, and then sits on the seat after making adjustments).

[0071] Under load, the backrest frame 200, driven by the angle adjustment motor assembly 300, flips forward relative to the seat cushion frame 100 from the initial position of the backrest B (backrest frame 200), i.e., the normal seat posture, to a folded position; or it flips backward from the initial position of the backrest B (backrest frame 200) to a reclining position, at which point the seat cushion frame 100 is driven upward to its highest position by the high-thrust push rod motor assembly 500. Alternatively, the backrest frame 200, driven by the angle adjustment motor assembly 300, flips backward relative to the seat cushion frame 100 from the initial position of the backrest B (backrest frame 200) to a reclining position, with the seat cushion frame 100 driven by the high-thrust push rod motor assembly 500, and the backrest frame 200 performs synchronous and regular height adjustments during the adjustment process to the reclining state.

[0072] Under no-load conditions, the backrest frame 200 is driven by the angle adjustment motor assembly 300 to flip forward relative to the seat cushion frame 100 from the initial position of the backrest B (backrest frame 200), i.e., the normal seat posture, to a folded position; or it flips backward from the initial position of the backrest B (backrest frame 200) to a reclining position, at which time the seat cushion frame 100 is driven upward to the highest position by the small-force push rod motor assembly 400 and locked; or the backrest frame 200 is driven by the angle adjustment motor assembly 300 to flip backward relative to the seat cushion frame 100 from the initial position of the backrest B (backrest frame 200) to a reclining position, and the seat cushion frame 100 is driven by the small-force push rod motor assembly 400, combined with the backrest frame 200 performing synchronous and regular height adjustment during the adjustment process to the reclining state. A further feature of this invention compared to the prior art is that the adjustment method of the seat frame is different, specifically:

[0073] See Figures 1 to 2 and Figures 11 to 12 and Figures 20 to 21 Under no load, the backrest B (backrest frame 200) is driven by the angle adjustment motor assembly 300 to rotate forward 115°±3° from the initial position of the backrest B (backrest frame 200) in the normal seat posture to the folded position with the seat cushion A (seat cushion frame 100).

[0074] See Figure 3 and Figures 13 to 14 and Figures 22 to 23 Under both on and off-load conditions, the backrest B (backrest frame 200) is driven from its initial position, i.e., normal seat posture, by the angle adjustment motor assembly 300. Figure 1 (As shown) Flip back 65°±3° to a lying position that is basically parallel to seat cushion A (seat cushion frame 100). Figure 3 (as shown in the diagram), at this time the seat frame 100 is driven upward to the highest position by the small thrust push rod motor assembly 400 or the large thrust push rod motor assembly 500.

[0075] See Figure 4 and Figures 15 to 16 and Figures 24 to 25 Under both on and off-load conditions, the backrest B (backrest frame 200) is driven by the angle adjustment motor assembly 300 to rotate backward by 10°±3° from its initial position to its normal sitting posture. In the normal sitting posture, the angle between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) is 125°±3°.

[0076] See Figure 5 and Figures 17 to 18 and Figures 26 to 27 With or without load, the backrest B (backrest frame 200) is driven by the angle adjustment motor assembly 300 to rotate backward by 37°±3° from its normal sitting posture to its reclining position. In this reclining position, the angle between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) is 162°±3°.

[0077] See Figure 9 With or without load, as the backrest B (backrest frame 200) is driven by the angle adjustment motor assembly 300 to rotate backward 37°±3° from its normal sitting position to its reclining position, the seat cushion A (seat cushion frame 100) begins to rise in height driven by the push rod motor assembly 400, and its height changes synchronously and regularly with the angle of the backrest B (backrest frame 200), as follows:

[0078] See Figure 6 Under both load and no load conditions, when the backrest B (backrest frame 200) is driven by the angle adjustment motor assembly 300 to rotate backward by 17°±3° from its normal sitting position (i.e., the angle between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) is 125°, i.e., to a rotation backward to the angle between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) is 142°, for every 1° adjustment of the backrest B (backrest frame 200), the seat cushion A (seat cushion frame 100) is raised by 0.5mm driven by the small thrust push rod motor assembly 400 or the large thrust push rod motor assembly 500.

[0079] Referring to the figure, under both loaded and unloaded conditions, as the backrest B (backrest frame 200) is driven by the angle adjustment motor assembly 300 to flip backward from a position with an angle of 142°±3° between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) to a position with an angle of 154°±3° between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100), for every 1° adjustment of the backrest B (backrest frame 200), the seat cushion A (seat cushion frame 100) is raised by 1.2mm driven by the small-force push rod motor assembly 400 or the large-force push rod motor assembly 500.

[0080] See Figure 8 Under both load and no load conditions, as the backrest B (backrest frame 200) is driven by the angle adjustment motor assembly 300 to flip backward from a position where the angle between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) is 154°±3° to a position where the backrest B (backrest frame 200) is in a reclining position and the angle between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) is 162°±3°, for every 1° adjustment of the backrest B (backrest frame 200), the seat cushion A (seat cushion frame 100) is raised by 3mm driven by the small thrust push rod motor assembly 400 or the large thrust push rod motor assembly 500.

[0081] See Figure 10 During the adjustment of the backrest B (backrest frame 200) individually or together with the seat cushion A (seat cushion frame 100), the backrest adjustment signal (such as backrest folding signal, backrest reclining signal, or backrest comfort signal) is input by the user or uses the previously stored memory position signal as the input signal. The control unit (such as the vehicle control system) for adjusting the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) will detect the rotation angle of the adjustment drive motor based on the position sensor of the adjustment drive motor set in the adjustment motor assembly, such as a Hall element, and then detect and determine the position of the backrest B (backrest frame 200). Then, the control unit (such as the vehicle control system) will use the position signal of the backrest B (backrest frame 200) and retrieve the backrest folding control program or backrest comfort control program from the database of the control unit (such as the vehicle control system) to control the adjustment motor assembly 300 individually or together with the push rod motor assembly 400 to fold, recline, or comfort the backrest B (backrest frame 200).

[0082] The folding of the backrest B (backrest frame 200) mentioned above is an adjustment under no-load conditions, while the reclining or comfortable adjustment of the backrest B (backrest frame 200) is carried out under load or no-load conditions.

[0083] In addition, during the process of using the backrest reclining control program to control the movement of the angle adjustment motor assembly 300 and the push rod motor assembly 400, the backrest reclining control program will not activate the seat cushion follow-up adjustment rate control program during the flipping process from the normal sitting posture of the backrest B (backrest frame 200), that is, the angle between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) is 125°±3° (a°) to the folding position (0°±3°) of the backrest and the seat cushion A (seat cushion frame 100). The seat cushion follow-up adjustment rate control program will only be activated during the rotation process between the normal sitting posture of the backrest B (backrest frame 200), i.e., the angle between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) is 125°±3° (a°), and the reclining posture, i.e., the angle between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) is 162°±3° (d°).

[0084] The seat cushion follow-up adjustment rate control program can be divided into three segments, of which:

[0085] The first stage of the seat cushion follow-up adjustment rate control program 1 is used to control the backrest B (backrest frame 200) to be driven by the angle adjustment motor assembly 300 to flip backward 17°±3° from the normal sitting posture of the backrest B (backrest frame 200) (the angle between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) is 125°±3° (a°)), that is, to flip backward to the position where the angle between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) is 142°±3° (b°). During this process, the first stage of the seat cushion follow-up adjustment rate control program 1 is used to control the seat cushion A (seat cushion frame 100) to be raised by 0.5mm by the small thrust push rod motor assembly 400 or the large thrust push rod motor assembly 500 for every 1° adjustment of the backrest B (backrest frame 200).

[0086] Similarly, the first stage of the seat cushion follow-up adjustment rate control program 1 is used to control the backrest B (backrest frame 200) to flip forward from a position where the angle between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) is 142°±3° (b°) to the normal sitting posture of the backrest B (backrest frame 200) (the angle between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) is 125°±3° (a°)) driven by the angle adjustment motor assembly 300. During this process, the first stage of the seat cushion follow-up adjustment rate control program 1 is used to control the seat cushion A (seat cushion frame 100) to decrease in height by 0.5mm driven by the small thrust push rod motor assembly 400 or the large thrust push rod motor assembly 500 for every 1° adjustment of the backrest B (backrest frame 200).

[0087] The second stage of the seat cushion follow-up adjustment rate control program 2 is used to control the backrest B (backrest frame 200) to flip backward from a position with an angle of 142°±3° (b°) between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) to a position with an angle of 154°±3° (c°) between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) by the angle adjustment motor assembly 300. During this process, the second stage of the seat cushion follow-up adjustment rate control program 2 is used to control the seat cushion A (seat cushion frame 100) to rise by 1.2mm in height by the small thrust push rod motor assembly 400 or the large thrust push rod motor assembly 500 for every 1° adjustment of the backrest B (backrest frame 200).

[0088] Similarly, the second stage of the seat cushion follow-up adjustment rate control program 2 is used to control the backrest B (backrest frame 200) to flip forward from a position with an angle of 154°±3° (c°) between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) to a position with an angle of 142°±3° (b°) between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) by the angle adjustment motor assembly 300. During this process, the second stage of the seat cushion follow-up adjustment rate control program 2 is used to control the seat cushion A (seat cushion frame 100) to drop in height by 1.2mm by the small thrust push rod motor assembly 400 or the large thrust push rod motor assembly 500 for every 1° adjustment of the backrest B (backrest frame 200).

[0089] The third stage of the seat cushion follow-up adjustment rate control program 3 is used to control the backrest B (backrest frame 200) to flip backward from a position with an angle of 154°±3° (c°) between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) to a reclining position (with an angle of 162°±3° between the backrest B (backrest frame 200) and the seat cushion A (seat cushion frame 100) during the process driven by the angle adjustment motor assembly 300. During this process, the third stage of the seat cushion follow-up adjustment rate control program 3 controls the backrest B (backrest frame 200) to adjust by 1°, and the seat cushion A (seat cushion frame 100) is raised by 3mm by the small thrust push rod motor assembly 400 or the large thrust push rod motor assembly 500.

[0090] Similarly, the third-stage seat cushion follow-up adjustment rate control program 3 is used to control the backrest B (backrest frame 200) to flip forward from the backrest reclining position (the angle between backrest B (backrest frame 200) and seat cushion A (seat cushion frame 100) is 162°±3°) to the position where the angle between backrest B (backrest frame 200) and seat cushion A (seat cushion frame 100) is 154°±3° (c°) driven by the angle adjustment motor assembly 300. During this process, the third-stage seat cushion follow-up adjustment rate control program 3 controls the backrest B (backrest frame 200) to adjust by 1°, and the seat cushion A (seat cushion frame 100) is driven by the small thrust push rod motor assembly 400 or the large thrust push rod motor assembly 500 to lower its height by 3mm.

[0091] The design of the aforementioned backrest reclining control program and seat cushion follow-up adjustment rate control program also needs to take into account the member's body size parameters or fuzzy weighing of the body weight for correction.

[0092] The seat frame of the present invention can be designed in various styles according to the vehicle model, but it basically includes the following basic structure.

[0093] See Figures 28 to 37 The basic structure of the foldable and reclining seat frame shown in the figure includes a backrest frame 200 and a seat cushion frame 100.

[0094] See also Figure 31 and Figure 32 The backrest frame 200 includes a pair of backrest side panels 210a and 210b, an upper backrest curved tube 220, a lower backrest horizontal plate 230, and a pair of headrest mounting tubes 240; the pair of backrest side panels 210a and 210b, the upper backrest curved tube 220, the lower backrest horizontal plate 230, and the pair of headrest mounting tubes 240 are all made of metal.

[0095] The tops of a pair of backrest side panels 210a and 210b are fixedly connected to the left and right ends of the upper backrest tube 220 by welding. A pair of headrest mounting tubes 240 are fixed to the upper backrest tube 220 by welding. The bottoms of a pair of backrest side panels 210a and 210b are fixedly connected to the left and right ends of the lower backrest cross panel 230 by welding.

[0096] The seat frame 100 includes a seat basin 110, a pair of seat basin side longitudinal beams 120a and 120b, an anti-submersion crossbeam welding assembly 130, a pair of front connecting swing arms 140a and 140b, a rear drive cross tube welding assembly 150, a pair of seat frame side plates 160a and 160b, a pair of backrest lower connecting plates 170a and 170b (these pair of backrest lower connecting plates 170a and 170b can also be part of the backrest frame 200), and a rear cross tube 180. Similarly, the seat basin 110, the pair of seat basin side longitudinal beams 120a and 120b, the anti-submersion crossbeam welding assembly 130, the pair of front connecting swing arms 140a and 140b, the rear drive cross tube welding assembly 150, the pair of seat frame side plates 160a and 160b, the pair of backrest lower connecting plates 170a and 170b, and the rear cross tube 180 are all made of metal.

[0097] See also Figure 33 and Figure 34 The front portions of a pair of side longitudinal beams 120a and 120b are fixed to the bottom left and right sides of the seat basin 110 by welding.

[0098] The anti-submarine beam welding assembly 130 includes an anti-submarine tube 131 and a pair of anti-submarine tube connecting plates 132a and 132b fixed on the left and right sides of the anti-submarine tube 131. The pair of anti-submarine tube connecting plates 132a and 132b are fixedly connected to the appropriate positions of the pair of side longitudinal beams 120a and 120b of the basin by welding.

[0099] The rear drive horizontal tube welding assembly 150 includes a rear drive horizontal tube 151 and a pair of rear drive horizontal tube connecting plates 152a and 152b fixed on the left and right sides of the rear drive horizontal tube 151. The rear ends of a pair of seat side longitudinal beams 120a and 120b are respectively fitted together with the holes and shafts of the pair of rear drive horizontal tube connecting plates 152a and 152b, and can rotate freely.

[0100] The pair of rear drive cross tube connecting plates 152a and 152b are also hinged to the rear side of the pair of seat frame side plates 160a and 160b by means of a screw and bushing.

[0101] See also Figure 35 and Figure 36 The left and right ends of the rear horizontal tube 180 are fixedly connected to the rear sides of a pair of seat frame side plates 160a and 160b by welding.

[0102] One end of each pair of front connecting swing arms 140a and 140b is hinged to the front part of each pair of seat side longitudinal beams 120a and 120b by means of a screw and a bushing, and can rotate freely; the other end of each pair of front connecting swing arms 140a and 140b is hinged to the front of each pair of seat frame side plates 160a and 160b, and can rotate freely.

[0103] The lower ends of a pair of backrest lower connecting plates 170a and 170b are fixedly connected to the rear sides of a pair of seat frame side plates 160a and 160b respectively by fastening bolts.

[0104] The angle adjustment motor assembly 300 includes an angle adjustment drive motor 310, a synchronizing rod 320, and a pair of angle adjusters 330a and 330b. The pair of angle adjusters 330a and 330b respectively hinge the bottom of a pair of backrest side panels 210a and 210b to the upper ends of a pair of backrest lower connecting plates 170a and 170b, thereby hinged the backrest frame 200 to the seat cushion frame 100. The pair of angle adjusters 330a and 330b can adjust the angle of the backrest frame 200.

[0105] The synchronization of a pair of angle adjusters 330a and 330b is achieved by a synchronizing rod 320 that is driven and connected to the pair of angle adjusters 330a and 330b, and the rotation of the synchronizing rod 320 is driven by the angle adjustment drive motor 310.

[0106] Since the backrest frame 200 only rotates between 0° and 162°, a position sensor such as a Hall element can be set in the angle adjustment drive motor 310 to detect the rotation angle of the angle adjustment drive motor 310 (this is prior art for those skilled in the art and will not be elaborated here). By detecting the rotation angle of the angle adjustment drive motor 310, the rotation angle of the backrest frame 200, i.e., the position of the backrest frame 200, can be determined.

[0107] The small-thrust push rod motor assembly 400 includes a push rod drive motor 410 and a lead screw mechanism 420 driven by the small-thrust push rod drive motor 410. The lead screw 421 in the lead screw mechanism 420 is hinged to the rear drive cross tube 151 by a screw and can rotate freely. See also: Figure 37 and Figure 39 The push rod drive motor 410 is fixed to either of the seat frame side plates 160a or 160b by three screws. The seat cushion frame 100 is height-adjusted by being driven by the small-force push rod motor assembly 400.

[0108] See Figure 38 The high-thrust push rod motor assembly 500 includes a high-thrust push rod drive motor 510 and a lead screw mechanism 520 driven by the high-thrust push rod drive motor 510. The lead screw 521 in the lead screw mechanism 420 is hinged to the rear drive cross tube 151 by screws and can rotate freely. The high-thrust push rod drive motor 510 is fixed to the bottom of the seat basin 110 by three screws. The seat cushion frame 100 is height-adjusted by the high-thrust push rod motor assembly 500.

[0109] To prevent the backrest frame 200 from flipping backward after reaching the reclining position, the present invention installs a backrest travel limit bracket 190a, 190b on each of the pair of backrest lower connecting plates 170a, 170b. When the backrest frame 200 is driven to flip backward to the reclining position by the angle adjustment motor assembly 300, each backrest travel limit bracket 190a, 190b contacts each backrest side plate 210a, 210b to limit the backrest frame 200 to the reclining position. Alternatively, the backrest travel limit brackets 190a, 190b can be removed, allowing the backrest frame 200 to flip to a flat state.

[0110] The backrest frame 200 and seat cushion frame 100 of the present invention can be adjusted under load and without load. The adjustment without load is applicable to application scenarios that only require one-click bed formation or one-click folding function.

Claims

1. A method for adjusting a foldable and reclining seat frame, comprising a seat frame, the seat frame including a backrest frame and a seat cushion frame, the backrest frame being hinged to the seat cushion frame, characterized in that, The backrest frame is angled relative to the seat cushion frame by an angle adjustment motor assembly, and the seat cushion frame is height-adjusted by a push rod motor assembly; the adjustment method of the seat frame is as follows: The backrest frame is driven by the angle adjustment motor assembly to flip forward from its initial position to the folded position with the seat cushion frame; Alternatively, the backrest frame can be flipped backward from its initial position to a lying position by the angle adjustment motor assembly, and the seat cushion frame can be lifted to its highest position by the push rod motor assembly. Alternatively, the backrest frame can be rotated backward from its initial position to a reclining position by the angle adjustment motor assembly. Before the backrest frame is rotated backward to a certain angle by the angle adjustment motor assembly, the seat cushion frame is fixed in height and does not rise. When the backrest frame is rotated backward to a certain angle by the angle adjustment motor assembly, the seat cushion frame begins to be driven by the push rod motor assembly to rise in height and changes synchronously and regularly with the angle of the backrest frame, and vice versa. Under no-load conditions, the push rod motor assembly is a low-thrust push rod motor assembly; the backrest frame is driven by the angle adjustment motor assembly to flip forward from its initial position to a folded position with the seat cushion frame; or the backrest frame is driven by the angle adjustment motor assembly to flip backward from its initial position to a reclining position, while the seat cushion frame is simultaneously raised to its highest position by the low-thrust push rod motor assembly; or the backrest frame is driven by the angle adjustment motor assembly to flip backward from its initial position to a reclining position. Before the backrest frame is flipped backward to a certain angle by the angle adjustment motor assembly, the seat cushion frame remains at a fixed height. When the backrest frame is flipped backward to a certain angle by the angle adjustment motor assembly, the seat cushion frame begins to be raised in height by the low-thrust push rod motor assembly and changes synchronously and regularly with the angle of the backrest frame, and vice versa.

2. The method for adjusting a foldable and reclining seat frame as described in claim 1, characterized in that, Under load, the push rod motor assembly is a high-thrust push rod motor assembly; the backrest frame is driven by the angle adjustment motor assembly to flip forward from its initial position to a folded position with the seat cushion frame; or the backrest frame is driven by the angle adjustment motor assembly to flip backward from its initial position to a lying position, while the seat cushion frame is driven by the high-thrust push rod motor assembly to raise its height to the highest position; or the backrest frame is driven by the angle adjustment motor assembly to flip backward from its initial position to a comfortable lying position. Before the backrest frame is flipped backward to a certain angle by the angle adjustment motor assembly, the height of the seat cushion frame is fixed and does not rise. When the backrest frame is flipped backward to a certain angle by the angle adjustment motor assembly, the seat cushion frame begins to be driven by the high-thrust push rod motor assembly to raise its height and changes synchronously and regularly with the angle of the backrest frame, and vice versa.

3. A method for adjusting a foldable and reclining seat frame as described in claim 1 or 2, characterized in that, The initial position of the backrest frame is at an angle of 115°±3° between the backrest frame and the seat cushion frame; the folded position of the backrest frame and the seat cushion frame is at an angle of 0°±3° between the backrest frame and the seat cushion frame; the reclining position of the backrest frame is at an angle of 162°±3° between the backrest frame and the seat cushion frame.

4. The method for adjusting a foldable and reclining seat frame as described in claim 3, characterized in that, The aforementioned angle is the position where the angle between the backrest frame and the seat cushion frame is 125°±3°.

5. The method for adjusting a foldable and reclining seat frame as described in claim 4, characterized in that, The seat cushion frame being driven by the push rod motor assembly to raise its height and then synchronously and regularly change its height with the angle of the backrest frame means that: when the angle between the backrest frame and the seat cushion frame is adjusted between 125°±3° and 142°±3°, the height of the seat cushion frame changes by 0.5mm for every 1° change in the backrest frame; when the angle between the backrest frame and the seat cushion frame is adjusted between 142°±3° and 154°±3°, the height of the seat cushion frame changes by 1.2mm for every 1° change in the backrest frame; and when the angle between the backrest frame and the seat cushion frame is adjusted between 154°±3° and 162°±3°, the height of the seat cushion frame changes by 3mm for every 1° change in the backrest frame.

6. A foldable and reclining seat frame, the seat frame comprising a backrest frame and a seat cushion frame, the backrest frame being hinged to the seat cushion frame, characterized in that, The backrest frame is driven by an angle-adjusting motor assembly to adjust its angle relative to the seat cushion frame, while the seat cushion frame is driven by a push-rod motor assembly to adjust its height. The backrest frame can be flipped forward from its initial position to a folded position with the seat cushion frame, driven by the angle-adjusting motor assembly; or the backrest frame can be flipped backward from its initial position to a reclining position, driven by the angle-adjusting motor assembly, at which point the seat cushion frame begins to rise to its highest position, driven by the push-rod motor assembly; or the backrest frame can be flipped backward from its initial position to a comfortable reclining position, driven by the angle-adjusting motor assembly. Before the backrest frame is flipped backward to a certain angle, the seat cushion frame remains fixed in height. When the backrest frame is flipped backward to a certain angle, the seat cushion frame begins to rise in height, driven by the push-rod motor assembly, and its height changes synchronously and regularly with the angle of the backrest frame, and vice versa. When used without load, the push rod drive motor is a low-thrust drive motor; when used with load, the push rod drive motor is a high-thrust drive motor.

7. A foldable and reclining seat frame as described in claim 6, characterized in that, The backrest frame includes a pair of backrest side panels, an upper backrest curved tube, and a lower backrest horizontal plate. The tops of the pair of backrest side panels are fixedly connected to the left and right ends of the upper backrest curved tube, and the bottoms of the pair of backrest side panels are fixedly connected to the left and right ends of the lower backrest horizontal plate. The seat frame includes a seat basin, a pair of seat basin side longitudinal beams, an anti-submarine beam welding assembly, a pair of front connecting swing arms, a rear drive horizontal tube welding assembly, a pair of seat frame side panels, a pair of lower backrest connecting plates, and a rear horizontal tube. The front portions of the pair of seat basin side longitudinal beams are fixed to the left and right sides of the seat basin. The anti-submarine beam welding assembly includes an anti-submarine tube and a pair of anti-submarine tube connecting plates fixed to the left and right sides of the anti-submarine tube. The pair of anti-submarine tube connecting plates are fixedly connected to the pair of seat basin side longitudinal beams at appropriate positions. The rear drive horizontal tube welding assembly includes a rear drive horizontal tube and a pair of rear drive horizontal tube connecting plates fixed to the left and right sides of the rear drive horizontal tube. The rear ends of the pair of seat basin side longitudinal beams are respectively connected to the pair of rear drive horizontal tubes. The left and right ends of the backrest are hinged together, and a pair of rear drive cross tube connecting plates are also hinged to the rear sides of a pair of seat frame side plates respectively; the left and right ends of the rear cross tubes are fixedly connected to the rear sides of a pair of seat frame side plates respectively; one end of a pair of front connecting swing arms is hinged to the front part of a pair of seat basin side longitudinal beams respectively, and the other end of a pair of front connecting swing arms is hinged to the front side of a pair of seat frame side plates respectively; the lower ends of a pair of backrest lower connecting plates are fixedly connected to the rear sides of a pair of seat frame side plates respectively; the angle adjustment motor assembly includes an angle adjustment drive motor, a synchronizing rod, and a pair of angle adjusters, the pair of angle adjusters respectively hinge the bottom of a pair of backrest side plates to the upper ends of a pair of backrest lower connecting plates and can adjust the angle of the backrest frame; the angle adjustment drive motor synchronously drives a pair of angle adjusters through the synchronizing rod; the push rod motor assembly includes a push rod drive motor and a lead screw mechanism driven by the push rod drive motor, the lead screw in the lead screw mechanism is hinged to the rear drive cross tube.

8. A foldable and reclining seat frame as described in claim 6, characterized in that, The small-thrust drive motor is fixed to any side plate of the seat frame; the large-thrust drive motor is fixed to the bottom surface of the seat basin.

9. A foldable and reclining seat frame as described in claim 6, characterized in that, The backrest frame also includes a pair of headrest mounting tubes fixed to the curved tubes on the backrest.

10. A foldable and reclining seat frame as described in claim 9, characterized in that, A backrest travel limit bracket is installed on each of the pair of backrest lower connecting plates. When the backrest frame is driven to flip backward to the reclining position by the angle adjustment motor assembly, each backrest travel limit bracket contacts each backrest side plate to restrict the backrest frame to the reclining position.

11. A seat, characterized in that, It includes the seat frame as described in any one of claims 4 to 10.

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