Zero-gravity car seat

Abstract

The utility model provides a zero gravity car seat belongs to car seat technical field. It has solved the problem of the poor riding comfort of the prior art car seat. The zero gravity car seat, the front end of two edge boards is hinged with first swing lever and second swing lever respectively, the free end of first swing lever and second swing lever all sets up to forward and is hinged with the front connecting rod of same side respectively, the hinge of first swing lever and front connecting rod is connected with first screw rod, the hinge of first rear connecting rod and slide rail is connected with the first screw sleeve of screwing on first screw rod, and when first screw rod rotates, the front end of seat cushion framework can swing up and down relative to slide rail, the front end of seat cushion framework is connected with second screw rod, and the second screw sleeve of screwing on second screw rod is hinged on second rear connecting rod, and when second screw rod rotates, seat cushion framework can lift relative to slide rail. The utility model has the advantages of improving the riding comfort of car seat.

Description

Technical Field

[0001] This utility model belongs to the field of automotive seat technology and relates to a zero-gravity automotive seat. Background Technology

[0002] With the development of science and technology and the improvement of people's living standards, people have higher and higher requirements for the comfort of car seats. When the backrest of a traditional car seat is reclined, the driver's body is roughly in a "V" shape, forming a semi-reclining position. However, the body pressure is unevenly distributed, and the driver's spine, neck and waist may still bear a large local pressure, which can easily lead to fatigue over time.

[0003] To address the aforementioned issues, Chinese patent literature discloses a reclining seat device for a compact car (authorization announcement number: CN210101387U), comprising an ECU, a seat cushion, a backrest, a pivot, a first guide rail, a second guide rail, first to sixth hydraulic rods, a limiting plate, a displacement adjustment mechanism, wheel speed sensors, angle sensors, a handbrake sensor, a distance sensor, a lifting knob, and a rotation knob. During operation, the ECU, based on the sensing signals from the angle sensor, handbrake sensor, and distance sensor, and combining the signals input from the lifting knob and rotation knob, controls the operation of the first to sixth hydraulic rods.

[0004] The reclining seat in this compact car uses a hydraulic transmission mechanism to achieve vertical movement of the seat, allowing the seat back and cushion to rotate to a 180-degree angle, enabling the driver and passengers to lie flat. This is more comfortable than traditional seats. However, when lying flat, the body weight is entirely supported by the back, buttocks, and back of the legs, especially the waist and spine, which lack effective support. Drivers and passengers may still experience back pain after lying flat for a long time. Therefore, the reclining seat in this compact car still cannot meet people's new requirements for the comfort of car seats. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a zero-gravity car seat. The technical problem this invention aims to solve is how to improve the comfort of car seats.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A zero-gravity car seat includes a pair of slide rails and a seat cushion frame disposed above the two slide rails. The seat cushion frame includes two elongated side plates, with a first rear connecting rod and a second rear connecting rod respectively hinged to the rear ends of the two side plates. The first and second rear connecting rods are respectively hinged to the slide rails on the same side. The front ends of the two slide rails are respectively hinged to front connecting rods. The seat cushion frame is characterized in that a first swing rod and a second swing rod are respectively hinged to the front ends of the two side plates. The free ends of the first and second swing rods are both forward-facing and hinged to the front connecting rods on the same side. A first lead screw is connected to the hinge point between the first swing rod and the front connecting rod. A first threaded sleeve screwed onto the first lead screw is connected to the hinge point between the first rear connecting rod and the slide rail. When the first lead screw rotates, the front end of the seat cushion frame can swing up and down relative to the slide rails. A second lead screw is connected to the front end of the seat cushion frame. A second threaded sleeve screwed onto the second lead screw is hinged to the second rear connecting rod. When the second lead screw rotates, the seat cushion frame can rise and fall relative to the slide rails.

[0008] This zero-gravity car seat addresses the issue of thigh-to-seat frame angle by allowing the front of the seat frame to swing up and down relative to the rails. Regardless of thigh length, the front of the seat frame can be rotated up and down to perfectly conform to the lower thigh curve, eliminating gaps or pressure in the knee area. It also addresses the issue of absolute height by raising and lowering the entire seat frame relative to the rails. When the passenger's thighs are short, lowering the overall height of the seat frame ensures adequate thigh support and comfortable foot placement. When the passenger's thighs are long, raising the overall height of the seat frame prevents excessive knee bending. This provides customized support and wrapping for the thigh-hip area, thus improving the comfort of the car seat.

[0009] In addition, the first threaded sleeve and the first rear linkage of this zero-gravity car seat adopt a coaxial hinge with a shared hinge hole, which can not only reduce the use of standard parts and simplify the structure, but also improve the motion accuracy and motion reliability of the linkage mechanism.

[0010] In the aforementioned zero-gravity car seat, the upper edge of the first swing arm has an L-shaped limiting plate. The first swing arm is hinged to the front connecting rod via a pin that passes laterally through the limiting plate. A first motor for driving the first lead screw to rotate is also mounted on the first swing arm. The first motor is fixed to the pin and located within the U-shaped groove formed by the limiting plate. Hinging the front connecting rod and the first swing arm with a pin and then fixing the first motor to the pin not only reduces the use of standard parts and simplifies the structure but also improves the motion accuracy and reliability of the linkage mechanism.

[0011] In the aforementioned zero-gravity car seat, a rotating shaft is fixedly connected to a slide rail on the same side as the first threaded sleeve. The first threaded sleeve and the first rear connecting rod are rotatably sleeved on the rotating shaft. The first threaded sleeve and the first rear connecting rod are coaxially hinged with a shared hinge hole, which not only reduces the use of standard parts and simplifies the structure, but also improves the motion accuracy and reliability of the linkage mechanism.

[0012] In the aforementioned zero-gravity car seat, one end of the first threaded sleeve is cylindrical and threaded to the outside of the first lead screw, while the other end of the first threaded sleeve is flat and hinged to the rotating shaft. This allows the first threaded sleeve to better connect to the first lead screw and be hinged to the rotating shaft.

[0013] In the aforementioned zero-gravity car seat, a second motor for driving the second lead screw to rotate is mounted on the seat cushion frame. The hinged end of the second rear linkage has a forward-extending flange. One end of the second threaded sleeve is cylindrical and threaded to the outside of the second lead screw, while the other end of the second threaded sleeve is flat and hinged to the inside of the flange. This allows the second motor to better drive the second rear linkage to swing through the second threaded sleeve.

[0014] In the aforementioned zero-gravity car seat, a front cross tube is provided at the front end of the seat cushion frame. One end of the front cross tube is fixedly connected to a side plate, and the other end is fixedly connected to another side plate via a fixing bracket. A second motor is fixedly connected to the fixing bracket, and both the first swing arm and the first motor are located below the front cross tube. This design allows for the installation of the second motor while retaining the function of the front cross tube.

[0015] In the aforementioned zero-gravity car seat, the slide rail includes a lower slide rail and an upper slide rail slidably connected within the lower slide rail. Mounting brackets are fixedly connected to each upper slide rail, and a reinforcing member connects the two mounting brackets. The reinforcing member includes an L-shaped relief plate and reinforcing rods coaxially fixed to both ends of the relief plate. The two reinforcing rods are hinged to mounting brackets on the same side, and the two front linkages are fixedly connected to mounting brackets on the same side. This design allows the torque of one front linkage to be transmitted to the other front linkage through the reinforcing member, while preventing interference between the reinforcing member and the first motor.

[0016] In the aforementioned zero-gravity car seat, a rear cross tube is provided between the two side panels. The two ends of the rear cross tube are respectively hinged to the side panels on the same side. A first rear connecting rod and a second rear connecting rod are respectively fixed to the rear cross tube. This allows the first and second rear connecting rods to drive the two side panels to swing through the rear cross tube.

[0017] Compared with existing technologies, the advantages of this zero-gravity car seat are as follows: 1. This zero-gravity car seat can solve the problem of the angle between the human thigh and the seat cushion frame by swinging the front end of the seat cushion frame up and down relative to the slide rail. Regardless of the length of the driver's or passenger's thighs, the front end of the seat cushion frame can be rotated up and down to perfectly fit the lower curve of the thigh, eliminating gaps or pressure in the back of the knee. It can also solve the problem of absolute height by raising and lowering the entire seat cushion frame relative to the slide rail. When the driver or passenger's thighs are short, lowering the overall height of the seat cushion frame can ensure that the thighs are fully supported and the feet can comfortably touch the ground. When the driver or passenger's thighs are long, raising the overall height of the seat cushion frame can prevent excessive bending of the knees. This achieves "customized wrapping and support" for the thigh-hip area of ​​different passengers, thereby improving the comfort of the car seat.

[0018] 2. The first threaded sleeve and the first rear connecting rod of this zero-gravity car seat are coaxially hinged with a shared hinge hole. At the same time, the first motor is fixed to the pin shaft that hinges the first swing rod and the front connecting rod. This not only reduces the use of standard parts and simplifies the structure, but also improves the motion accuracy and reliability of the linkage mechanism. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of a zero-gravity car seat after the backrest frame has been removed.

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of a zero-gravity car seat after removing the seat cushion frame and backrest frame.

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the front end of the zero-gravity car seat cushion frame after it swings upward relative to the slide rail.

[0022] Figure 4 This is a schematic diagram illustrating the principle of the front end of the zero-gravity car seat cushion frame swinging up and down relative to the slide rail.

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the zero-gravity car seat cushion frame after it rises relative to the slide rail.

[0024] Figure 6 This is a schematic diagram illustrating the principle of lifting and lowering the zero-gravity car seat cushion frame relative to the sliding rail.

[0025] In the diagram, 1 is the slide rail; 1a is the lower slide rail; 1b is the upper slide rail; 2 is the seat frame; 2a is the side plate; 2b is the rear cross tube; 3 is the front connecting rod; 4 is the first rear connecting rod; 5 is the second rear connecting rod; 5a is the flange plate; 6 is the first swing rod; 6a is the limiting plate; 7 is the second swing rod; 8 is the first lead screw; 9 is the first threaded sleeve; 10 is the second lead screw; 11 is the second threaded sleeve; 12 is the pin; 13 is the fixing bracket; 14 is the mounting bracket; 15 is the reinforcing member; 15a is the relief plate; 15b is the reinforcing rod; 16 is the front cross tube; 17 is the rotating shaft; 18 is the first motor; 19 is the second motor. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0027] A zero-gravity car seat, reference Figure 1-6 The device includes a pair of slide rails 1 and a seat frame 2 disposed above the two slide rails 1. The seat frame 2 includes two elongated side plates 2a. The rear ends of the two side plates 2a are respectively hinged to a first rear connecting rod 4 and a second rear connecting rod 5. The first rear connecting rod 4 and the second rear connecting rod 5 are respectively hinged to the slide rails 1 on the same side. The front ends of the two slide rails 1 are respectively hinged to a front connecting rod 3. The front ends of the two side plates 2a are respectively hinged to a first swing rod 6 and a second swing rod 7. The free ends of the first swing rod 6 and the second swing rod 7 are both forward-facing and respectively connected to the front connecting rod 3 on the same side. The first swing rod 6 and the front connecting rod 3 are hinged together, and the first lead screw 8 is connected to the hinge of the first rear connecting rod 4 and the slide rail 1. A first threaded sleeve 9 is screwed onto the first lead screw 8. When the first lead screw 8 rotates, the front end of the seat frame 2 can swing up and down relative to the slide rail 1. The front end of the seat frame 2 is connected to a second lead screw 10. A second threaded sleeve 11 is hinged onto the second rear connecting rod 5 and screwed onto the second lead screw 10. When the second lead screw 10 rotates, the seat frame 2 can rise and fall relative to the slide rail 1.

[0028] Combination Figure 1 , Figure 2 and Figure 3 Specifically, a rotating shaft 17 is fixedly connected to the slide rail 1 on the same side as the first threaded sleeve 9. The first threaded sleeve 9 and the first rear connecting rod 4 are rotatably sleeved on the rotating shaft 17. The upper edge of the first swing rod 6 has an L-shaped limiting plate 6a. The first swing rod 6 is hinged to the front connecting rod 3 by a pin 12 that passes through the limiting plate 6a laterally. The first swing rod 6 is also provided with a first motor 18 for driving the first lead screw 8 to rotate. The first motor 18 is fixedly connected to the pin 12 and located in the U-shaped groove formed by the limiting plate 6a.

[0029] Combination Figure 2 , Figure 3 and Figure 4 More specifically, one end of the first threaded sleeve 9 is cylindrical and threaded to the outside of the first lead screw 8, and the other end of the first threaded sleeve 9 is flat and hinged to the rotating shaft 17; a second motor 19 for driving the second lead screw 10 to rotate is installed on the seat frame 2; the hinged end of the second rear connecting rod 5 has a forward-extending flange 5a; one end of the second threaded sleeve 11 is cylindrical and threaded to the outside of the second lead screw 10, and the other end of the second threaded sleeve 11 is flat and hinged to the inside of the flange 5a.

[0030] Combination Figure 2 , Figure 3 and Figure 4 More specifically, the slide rail 1 includes a lower slide rail 1a and an upper slide rail 1b slidably connected within the lower slide rail 1a. Each upper slide rail 1b is fixedly connected to a mounting bracket 14. A reinforcing member 15 is connected between the two mounting brackets 14. The reinforcing member 15 includes a relief plate 15a with an L-shaped cross-section and reinforcing rods 15b coaxially fixed to both ends of the relief plate 15a. The two reinforcing rods 15b are respectively hinged to the mounting brackets 14 on the same side. The two front connecting rods 3 are respectively fixedly connected to the reinforcing rods 15b on the same side.

[0031] The front end of the seat cushion frame 2 is also provided with a front horizontal tube 16. One end of the front horizontal tube 16 is fixed to the side plate 2a, and the other end is fixed to another side plate 2a through a fixing frame 13. The second motor 19 is fixed to the fixing frame 13. The first swing rod 6 and the first motor 18 are both located below the front horizontal tube 16.

[0032] The working principle of this zero-gravity car seat is explained below:

[0033] When adjustment is needed to allow the front end of the seat cushion frame 2 to rotate up and down relative to the slide rail 1, the second motor 19 is not working, and the first motor 18 drives the first lead screw 8 to rotate, causing the first motor 18 to move away from or towards the first threaded sleeve 9 along the axial direction of the first lead screw 8. When the first motor 18 approaches the first threaded sleeve 9, the hinge end of the front connecting rod 3 and the first swing rod 6 swings upward, and correspondingly, the hinge end of the first swing rod 6 and the front connecting rod 3 swings downward. At the same time, the torque generated when the front connecting rod 3 swings is transmitted to the other front connecting rod 3 through the reinforcing member 15, causing the hinge end of the other front connecting rod 3 and the second swing rod 7 to swing upward synchronously, and correspondingly, the hinge end of the second swing rod 7 and the front connecting rod 3 to swing downward synchronously, thereby causing the front end of the seat cushion frame 2 to swing upward relative to the slide rail 1 as a whole (refer to...). Figure 3 and Figure 4 , Figure 3 (A three-dimensional structural diagram of the front end of the seat frame 2 after it swings upward relative to the slide rail 1);

[0034] Similarly, when the first motor 18 moves away from the first screw sleeve 9, the hinge end of the front connecting rod 3 and the first swing rod 6 swings downward. Correspondingly, the hinge end of the first swing rod 6 and the front connecting rod 3 swings upward. At the same time, the torque generated when the front connecting rod 3 swings is transmitted to the other front connecting rod 3 through the reinforcing member 15, causing the hinge end of the other front connecting rod 3 and the second swing rod 7 to swing downward synchronously. Correspondingly, the hinge end of the second swing rod 7 and the front connecting rod 3 to swing upward synchronously, thereby causing the front end of the seat frame 2 to rotate downward relative to the slide rail 1 (refer to...). Figure 4 ).

[0035] When adjustment is needed to raise or lower the seat cushion frame 2 relative to the slide rail 1, the first motor 18 is not working, and the second motor 19 drives the second lead screw 10 to rotate. Since the second motor 19 is fixed to the seat cushion frame 2, it can only move away from or towards the second motor 19 along the axial direction of the second lead screw 10 using the second screw sleeve 11. When the second screw sleeve 11 moves away from the second motor 19, since the second screw sleeve 11 is hinged to the flange plate 5a on the lower edge of the second rear connecting rod 5, the second screw sleeve 11 can drive the second rear connecting rod that is hinged to it. 5. The second rear link 5 swings around the hinge point. Specifically, the hinge end of the second rear link 5 and the slide rail 1 swings downward, and correspondingly, the fixed end of the second rear link 5 and the rear cross tube 2b swings upward. At the same time, the torque of the second rear link 5 is transmitted to the first rear link 4 on the other side through the rear cross tube 2b, so that the hinge end of the first rear link 4 and the slide rail 1 also swings downward synchronously. This causes the entire seat frame 2 to swing upward around the hinge point of the second rear link 5 and the slide rail 1 to a near-horizontal state, thereby realizing the overall rise of the seat frame 2 relative to the slide rail 1 (refer to...). Figure 5 , Figure 5(A schematic diagram of the three-dimensional structure of the seat frame 2 after it has risen relative to the slide rail 1);

[0036] Similarly, when the second screw sleeve 11 approaches the second motor 19, the hinge end of the second rear connecting rod 5 and the slide rail 1 swings upward. Correspondingly, the fixed end of the second rear connecting rod 5 and the rear horizontal tube 2b swings downward. At the same time, the torque of the second rear connecting rod 5 is transmitted to the first rear connecting rod 4 on the other side through the rear horizontal tube 2b, so that the hinge end of the first rear connecting rod 4 and the slide rail 1 also swings upward synchronously. This causes the entire seat frame 2 to swing downward around the hinge point of the second rear connecting rod 5 and the slide rail 1 and reset, thereby causing the entire seat frame 2 to descend relative to the slide rail 1.

[0037] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A zero-gravity car seat, comprising a pair of slide rails (1) and a seat cushion frame (2) disposed above the two slide rails (1), wherein the seat cushion frame (2) comprises two elongated side plates (2a), the rear ends of the two side plates (2a) are respectively hinged to a first rear link (4) and a second rear link (5), the first rear link (4) and the second rear link (5) are respectively hinged to the slide rails (1) on the same side, and the front ends of the two slide rails (1) are respectively hinged to a front link (3), characterized in that, The front ends of the two side plates (2a) are respectively hinged to a first swing rod (6) and a second swing rod (7). The free ends of the first swing rod (6) and the second swing rod (7) are both forward-facing and respectively hinged to the front connecting rod (3) on the same side. A first lead screw (8) is connected to the hinge of the first swing rod (6) and the front connecting rod (3). A first threaded sleeve (9) screwed onto the first lead screw (8) is connected to the hinge of the first rear connecting rod (4) and the slide rail (1). When the first lead screw (8) rotates, the front end of the seat frame (2) can swing up and down relative to the slide rail (1). The front end of the seat frame (2) is connected to a second lead screw (10). A second threaded sleeve (11) screwed onto the second lead screw (10) is hinged to the second rear connecting rod (5). When the second lead screw (10) rotates, the seat frame (2) can rise and fall relative to the slide rail (1).

2. A zero-gravity car seat according to claim 1, characterized in that, The upper edge of the first swing rod (6) has an L-shaped limiting plate (6a). The first swing rod (6) is hinged to the front connecting rod (3) by a pin (12) that passes through the limiting plate (6a) laterally. The first swing rod (6) is also provided with a first motor (18) for driving the first lead screw (8) to rotate. The first motor (18) is fixed to the pin (12) and located in the U-shaped groove formed by the limiting plate (6a).

3. A zero-gravity car seat according to claim 2, characterized in that, A rotating shaft (17) is fixedly connected to the slide rail (1) on the same side as the first threaded sleeve (9). The first threaded sleeve (9) and the first rear connecting rod (4) are rotatably sleeved on the rotating shaft (17).

4. A zero-gravity car seat according to claim 3, characterized in that, One end of the first threaded sleeve (9) is cylindrical and threaded to the outside of the first lead screw (8), and the other end of the first threaded sleeve (9) is flat and hinged to the rotating shaft (17).

5. A zero-gravity car seat according to claim 4, characterized in that, The seat frame (2) is equipped with a second motor (19) for driving the second lead screw (10) to rotate. The hinge end of the second rear connecting rod (5) has a forward-extending flange (5a). One end of the second threaded sleeve (11) is cylindrical and threaded to the outside of the second lead screw (10). The other end of the second threaded sleeve (11) is flat and hinged to the inside of the flange (5a).

6. A zero-gravity car seat according to claim 5, characterized in that, The front end of the seat frame (2) is also provided with a front horizontal tube (16). One end of the front horizontal tube (16) is fixed to the side plate (2a), and the other end is fixed to another side plate (2a) through a fixing frame (13). The second motor (19) is fixed to the fixing frame (13). The first swing rod (6) and the first motor (18) are both located below the front horizontal tube (16).

7. A zero-gravity car seat according to any one of claims 1-6, characterized in that, The slide rail (1) includes a lower slide rail (1a) and an upper slide rail (1b) slidably connected within the lower slide rail (1a). Mounting brackets (14) are fixedly connected to the upper slide rail (1b). A reinforcing member (15) is connected between the two mounting brackets (14). The reinforcing member (15) includes a relief plate (15a) with an L-shaped cross-section and reinforcing rods (15b) coaxially fixed to both ends of the relief plate (15a). The two reinforcing rods (15b) are respectively hinged to the mounting brackets (14) on the same side. The two front connecting rods (3) are respectively fixed to the reinforcing rods (15b) on the same side.

8. A zero-gravity car seat according to any one of claims 1-6, characterized in that, A rear horizontal tube (2b) is provided between the two side plates (2a), and the two ends of the rear horizontal tube (2b) are respectively hinged to the side plates (2a) on the same side. The first rear connecting rod (4) and the second rear connecting rod (5) are respectively fixed to the rear horizontal tube (2b).

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