A lying-flat frame structure for a car seat
By designing the lying skeleton structure of the car seat and using the transmission device and the power-assisted torsion spring to achieve synchronous adjustment of the seat cushion and backrest, the problem of passengers not being able to completely lying down in the prior art is solved, independent backrest angle adjustment and seat durability are achieved, and insufficient support and appearance defects are avoided.
Patent Information
- Application Number
- CN202311216248.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-20
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2043-09-20
AI Technical Summary
Existing car seats cannot achieve complete passenger lying flat, and there are defects in insufficient support, wrinkles of covers, foam tear and exposed skeletons.
A lying flat frame structure of the car seat is designed, including a backrest frame and a cushion frame. It is connected to the cushion frame through a backrest angle adjustment mechanism, equipped with a transmission device and a power torsion spring, and synchronous adjustment of the cushion and the backrest is achieved by using a four-link mechanism to ensure that the cushion foaming and the face cover are flush with the backrest foaming and the face cover, and a height adjustment mechanism is equipped to realize the synchronous flatness of multiple seats.
The passengers are fully lying flat and the angle adjustment of independent backrests is achieved, avoiding defects such as insufficient support, wrinkles of the cover, foam tear and exposed skeletons. The seat structure is simple, easy to install, and has no loss of durability.
Smart Images
Figure CN117022073B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of automobile seats, and in particular to a lying-flat frame structure of an automobile seat. Background Art
[0002] The requirements for a car seat to allow passengers to lie flat are: ① There is no step between the seat cushion and the backrest; ② There is no angle between the seat cushion and the backrest; ③ The fitting plane of the seat cushion and the backrest does not make an angle with the horizontal plane; ④ The seat must be locked in the flat position and cannot shake. Currently, there are three types of car seats on the market that allow passengers to lie down:
[0003] 1. Reclining by adjusting the backrest angle. The disadvantage is that this type of seat structure cannot allow passengers to lie completely flat.
[0004] 2. By linking with the backrest, the rear frame of the seat cushion is lifted upward. Disadvantages are: ① This seat structure cannot allow the passenger to lie completely flat; ② This method cannot achieve independent backrest angle adjustment.
[0005] 3. By interlocking with the backrest, the rear end of the seat cushion foam is lifted upward. Disadvantages include: ① This seat structure does not allow passengers to lie completely flat; ② This method does not allow for independent backrest angle adjustment; ③ This method places strict demands on the seat cushion's appearance, which can easily lead to defects such as insufficient cushion support, wrinkled cover, and foam tearing; ④ This method cannot avoid the appearance defect of exposed metal parts. Summary of the Invention
[0006] In response to the problems existing in the above-mentioned prior art, the present invention aims to provide a new lie-flat frame structure for automobile seats, which can enable passengers to lie completely flat and independently adjust the backrest angle, without the defects of insufficient support, wrinkled cover, torn foam and exposed frame.
[0007] In order to achieve the above-mentioned purpose, the present invention proposes a lie-flat frame structure of a car seat, comprising a backrest frame and a seat cushion frame, wherein the backrest frame is connected to the seat cushion frame via a backrest angle adjustment mechanism, the backrest frame is provided with a backrest foam and a surface cover, the seat cushion frame is provided with a seat cushion foam and a surface cover, the seat cushion frame comprises a seat frame frame, a seat basin, a seat spring and a seat spring mounting bracket, the seat frame frame is equipped with a tilt adjustment mechanism, the front end of the seat spring is clamped on the seat basin, and the rear end of the seat spring is clamped on the seat spring mounting bracket,
[0008] The seat cushion frame also includes two lying-flat push rods arranged opposite to each other on the left and right sides, and the two lying-flat push rods are respectively arranged near the inner walls of the left and right ends of the seat frame. The front ends of the two lying-flat push rods are hinged to the seat frame frame, and the middle parts of the two lying-flat push rods are hinged with a seat basin pull rod, and the hinge point is located at the rear end of the seat basin pull rod. The front ends of the two seat basin pull rods are hinged to the rear end of the seat basin, the front end of the seat basin is hinged to the seat frame frame, and an auxiliary torsion spring is provided between the seat basin and the seat frame frame, and the auxiliary torsion spring has a torsion force that drives the seat basin to flip forward. A lying-flat synchronization tube is passed between the middle parts of the two lying-flat push rods. The seat spring mounting bracket is fixedly connected, and the seat spring mounting bracket is hinged between the rear ends of the two lying-flat push rods, and the hinge points on both sides are respectively located above the left and right ends of the seat spring mounting bracket. The left and right ends of the seat spring mounting bracket are hinged with seat spring pull rods below, and the hinge points are located at the rear ends of the seat spring pull rods. The front ends of the two seat spring pull rods extend upward and forward and are respectively hinged to the seat frame skeleton. A transmission device is provided at the front end of the seat frame skeleton, and the front end of one of the lying-flat push rods extends downward and forward for being hinged to the transmission device. The transmission device can move forward and backward, and can rotate relative to the seat frame skeleton.
[0009] In the above scheme: the transmission device includes a lying-flat motor, a screw rod and a frame, the frame is fixed on the seat frame frame, the lying-flat motor is hinged in the frame, the screw rod and the lying-flat motor cooperate to form a worm gear structure, the lying-flat motor can drive the screw rod to move forward and backward, the lying-flat push rod is hinged to the screw rod, the structure is simple and the installation is convenient.
[0010] In the above scheme: the seat frame is also equipped with a height adjustment mechanism, which can realize the joint use of multiple car seats in a lying-flat state. When multiple car seats are laid flat at the same time in the longitudinal direction, all car seats can be laid flat and connected on the same plane by adjusting the height adjustment mechanism.
[0011] In the above scheme: a torsion spring mounting shaft is fixedly provided on the seat frame frame, the power torsion spring is sleeved on the torsion spring mounting shaft, one end of the torsion spring is hooked on the seat frame frame, and the other end is hooked on the seat basin, which has a simple structure and is easy to install.
[0012] The beneficial effects of the present invention are:
[0013] The backrest frame of this chair can be laid flat backward through the backrest angle adjustment mechanism, and the backrest foam and surface cover can be laid flat along with the backrest frame; the laying mechanism of the seat cushion frame of this chair is equivalent to the superposition of two sets of four-bar mechanisms, and the specific principle is: the transmission device can push the lying flat push rod to rotate upward around the hinge point between the lying flat push rod and the seat frame frame, and under the action of the lying flat synchronization tube, the lying flat push rods on both sides can move synchronously, and their rotation centers are coaxial; the seat basin can rotate forward around the hinge point between the seat basin and the seat frame frame under the torsion of the power-assisting torsion spring, and at the same time be limited by the seat basin pull rods on both sides; the two seat spring pull rods can rotate around their respective hinge points with the seat frame The hinge points of the skeleton rotate with their rotation centers coaxially; the seat spring mounting bracket moves upward under the joint action of the lie-flat push rod and the seat spring pull rod; the seat spring is a flexible part that can absorb the change in the distance between the seat basin and the seat spring mounting bracket during movement; the seat cushion foam and cover can move upward under the joint action of the seat basin, the seat spring mounting bracket and the seat spring, and the fitting plane of the seat cushion foam and cover can eventually reach a position flush with the fitting plane of the backrest foam and cover; finally, the inclination adjustment mechanism is adjusted to make the overall fitting plane of the seat cushion foam and cover and the backrest foam and cover parallel to the horizontal plane, so that the seat can reach a completely lie-flat state.
[0014] In short, the present invention does not cause loss of skeleton strength; does not affect the basic adjustment of the skeleton, and can integrate the multi-directional adjustment structure of the seat; each adjustment mechanism can be adjusted independently without affecting each other, and can be independently selected; it can enable passengers to lie completely flat, increasing the practicality and usage scenarios of the seat; the durability of the seat is not lost, and the foam and the cover are basically invisible during the adjustment process, and there are no defects such as cover wrinkles and foam tearing; there are no defects of insufficient support and seat shaking. After the seat reaches the lying flat state, the power torsion spring and the transmission device can lock the seat in the lying flat state. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a right side cross-sectional view of the seat frame (sitting position).
[0016] Figure 2 This is a left side cross-sectional view of the seat frame (sitting position).
[0017] Figure 3 It is an axonometric view of the present invention (seating position).
[0018] Figure 4 It is a right side cross-sectional view of the present invention (without foaming, lying flat position).
[0019] Figure 5 It is a right side cross-sectional view of the present invention (with foaming and lying flat position). DETAILED DESCRIPTION
[0020] like Figure 1—5 shows a lying-flat frame structure of a car seat, which is mainly composed of a backrest frame and a seat cushion frame. The backrest frame is connected to the seat cushion frame through a backrest angle adjustment mechanism 11. The backrest frame is provided with a backrest foam and a surface cover 14, and the seat cushion frame is provided with a seat cushion foam and a surface cover 13.
[0021] The seat cushion frame includes a seat frame frame 7, a seat basin 3, a seat spring 12 and a seat spring mounting bracket 9. The seat frame frame 7 is equipped with a tilt adjustment mechanism 10. The front end of the seat spring 12 is clamped on the seat basin 3, and the rear end of the seat spring 12 is clamped on the seat spring mounting bracket 9.
[0022] The seat frame also includes two lie-flat push rods 5 arranged opposite each other on the left and right sides, respectively located near the inner walls of the left and right ends of the seat frame frame 7. The front ends of the two lie-flat push rods 5 are hinged to the seat frame frame 7. The middle portions of the two lie-flat push rods 5 are hinged to a seat basin pull rod 4, with the hinge point located at the rear end of the seat basin pull rod 4. The front ends of the two seat basin pull rods 4 are hinged to the rear end of the seat basin 3, and the front end of the seat basin 3 is hinged to the seat frame frame 7. A power-assisting torsion spring 2 is provided between the seat basin 3 and the seat frame frame 7, exerting a torsional force that drives the seat basin 3 to tilt forward.
[0023] The middle parts of the two lying-flat push rods 5 are fixedly connected through a lying-flat synchronization pipe 6 .
[0024] The seat spring mounting bracket 9 is hinged between the rear ends of the two lying-flat push rods 7, and the hinge points on both sides are respectively located above the left and right ends of the seat spring mounting bracket 9. The left and right ends of the seat spring mounting bracket 9 are hinged with seat spring pull rods 8 below, and the hinge points are located at the rear ends of the seat spring pull rods 8. The front ends of the two seat spring pull rods 8 extend upward and forward, and are respectively hinged to the seat frame frame 7.
[0025] A transmission device 1 is provided at the front end of the seat frame frame 7, wherein the front end of a lie-flat push rod 5 extends downward and forward for being hinged to the transmission device 1. The transmission device 1 can move forward and backward and can rotate relative to the seat frame frame 7.
[0026] Preferably, the transmission device 1 includes a lying-flat motor, a screw and a frame. The frame is fixed on the seat frame frame 7, the lying-flat motor is hinged in the frame, the screw and the lying-flat motor cooperate to form a worm gear structure, the lying-flat motor can drive the screw to move back and forth, and the lying-flat push rod 5 is hinged to the screw, with a simple structure and easy installation.
[0027] Preferably, the seat frame 7 is also equipped with a height adjustment mechanism 15, which can realize the joint use of multiple car seats in a lying-flat state. When multiple car seats are laid flat at the same time in the longitudinal direction, all car seats can be laid flat and connected on the same plane by adjusting the height adjustment mechanism 15.
[0028] Preferably, a torsion spring mounting shaft is fixedly provided on the seat frame frame 7, and the power torsion spring 2 is sleeved on the torsion spring mounting shaft, one end of which is hooked on the seat frame frame 7, and the other end is hooked on the seat basin 3. The structure is simple and the installation is convenient.
[0029] The principle of the present invention to achieve complete lying flat is:
[0030] The backrest frame is flattened backwards through the backrest angle adjustment mechanism 11, and the backrest foam and surface cover 14 are flattened along with the backrest frame; the flattening mechanism of the seat cushion frame is equivalent to the superposition of two sets of four-bar linkage mechanisms. The transmission device 1 can push the flattening push rod 5 to rotate upward around the hinge point between the flattening push rod 5 and the seat frame frame 7. Under the action of the flattening synchronization tube 6, the flattening push rods 5 on both sides can move synchronously, and their rotation centers are coaxial;
[0031] Under the torsion force of the assist torsion spring 2, the seat basin 3 can rotate forward about the hinge point between the seat basin 3 and the seat frame 7, while being limited by the seat basin pull rods 4 on both sides; the two seat spring pull rods 8 can rotate about their respective hinge points with the seat frame 7, and their rotation centers are coaxial;
[0032] The seat spring mounting bracket 9 moves upward under the combined action of the lying push rod 5 and the seat spring pull rod 8; the seat spring 12 is a flexible part that can absorb the change in the distance between the seat basin 3 and the seat spring mounting bracket 9 during the movement;
[0033] The seat cushion foam and the cover 13 can move upward under the joint action of the seat basin 3, the seat spring mounting bracket 9, and the seat spring 12, and the fitting plane of the seat cushion foam and the cover 13 can eventually reach a position flush with the fitting plane of the backrest foam and the cover 14;
[0034] Finally, adjust the inclination adjustment mechanism 10 so that the overall fitting plane of the seat cushion foam and surface cover 13 and the backrest foam and surface cover 14 is parallel to the horizontal plane, so that the seat reaches a completely lying state.
Claims
1. A car seat lying-flat frame structure, comprising a backrest frame and a seat cushion frame, wherein the backrest frame is connected to the seat cushion frame via a backrest angle adjustment mechanism (11), the backrest frame is provided with a backrest foam and a face cover (14), the seat cushion frame is provided with a seat cushion foam and a face cover (13), the seat cushion frame comprises a seat frame frame (7), a seat basin (3), a seat spring (12) and a seat spring mounting bracket (9), the seat frame frame (7) is equipped with a tilt adjustment mechanism (10), the front end of the seat spring (12) is clamped on the seat basin (3), and the rear end of the seat spring (12) is clamped on the seat spring mounting bracket (9), and the seat seat frame (7) is provided ... The cushion frame also includes two lying-flat push rods (5) arranged opposite to each other on the left and right sides. The two lying-flat push rods (5) are respectively arranged near the inner walls of the left and right ends of the seat frame frame (7). The front ends of the two lying-flat push rods (5) are hinged to the seat frame frame (7). The middle parts of the two lying-flat push rods (5) are hinged to the seat basin pull rod (4), and the hinge point is located at the rear end of the seat basin pull rod (4). The front ends of the two seat basin pull rods (4) are hinged to the rear end of the seat basin (3). The front end of the seat basin (3) is hinged to the seat frame frame (7), and an auxiliary torsion spring (2) is provided between the seat basin (3) and the seat frame frame (7). The auxiliary torsion spring (2) has a torsion force that drives the seat basin (3) to flip forward. The middle parts of the two lying-flat push rods (5) are connected by The lying-flat synchronization tube (6) is fixed, the seat spring mounting bracket (9) is hinged between the rear ends of the two lying-flat push rods (5), and the hinge points on both sides are respectively located above the left and right ends of the seat spring mounting bracket (9), and the left and right ends of the seat spring mounting bracket (9) are hinged with seat spring pull rods (8) below, and the hinge points are located at the rear ends of the seat spring pull rods (8), the front ends of the two seat spring pull rods (8) extend upward and forward, and are respectively hinged to the seat frame frame (7), and the front end of the seat frame frame (7) is provided with a transmission device (1), wherein the front end of one lying-flat push rod (5) extends downward and forward for being hinged to the transmission device (1), and the transmission device (1) can move forward and backward and can rotate relative to the seat frame frame (7).
2. The car seat lying-flat frame structure according to claim 1, characterized in that: The transmission device (1) includes a lying-flat motor, a screw and a frame, wherein the frame is fixed on the seat frame frame (7), the lying-flat motor is hinged in the frame, the screw cooperates with the lying-flat motor to form a worm gear structure, the lying-flat motor can drive the screw to move forward and backward, and the lying-flat push rod (5) is hinged to the screw.
3. The car seat lie-flat frame structure according to claim 1, characterized in that: The seat frame (7) is also equipped with a height adjustment mechanism (15).
4. The car seat lie-flat frame structure according to claim 1, characterized in that: A torsion spring mounting shaft is fixedly provided on the seat frame frame (7); the power torsion spring (2) is sleeved on the torsion spring mounting shaft, one end of which is hooked on the seat frame frame (7) and the other end of which is hooked on the seat basin (3).
Citation Information
Patent Citations
Turnover and foldable seat
CN102205801A
Vehicle seat, in particular motor vehicle seat
CN106573553A