Zero-gravity car seat

Abstract

This invention discloses a zero-gravity car seat, including a seat frame base and a seat frame skeleton located above the seat frame base. An upper crossbeam is provided at the front of the seat frame skeleton, and a lower crossbeam is provided on the seat frame base. The upper and lower crossbeams are connected by a screw lifting mechanism located in the middle area of ​​the front of the seat frame. Slide pairs are provided on both sides of the seat frame, and the slide pairs can only move up and down. The screw lifting mechanism includes a drive motor connected to a vertically arranged screw. A nut seat that can move along the screw is fitted onto the screw, and the nut seat is fixedly connected to a support plate. The top of the support plate always supports the upper crossbeam. This invention ensures the stability and safety of the zero-gravity car seat during the lifting process with a simple and low-cost lifting structure / mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to a car seat, in particular to a zero-gravity car seat. BACKGROUND

[0002] The zero-gravity car seat refers to a brand-new seat designed by combining the zero-gravity principle and car seat technology. The seat makes the occupant sitting on the seat in a natural state and inhibits the discomfort caused by the earth's gravity to a certain extent.

[0003] In the prior art, a zero-gravity seat frame lifting structure (document CN218316359U) includes right and left bottom seats on which right and left frames are respectively arranged. A driving arm is hinged between the left connecting arm and the left frame. A motor drives a toothed plate to move, and the toothed plate drives the driving arm to move through a connecting rod, thereby forming a lifting zero-gravity seat frame lifting structure. A cross bar is arranged between the inner side of the toothed plate and the driving arm. The lifting structure essentially adopts a connecting rod lifting mechanism. Although the cross bar counteracts the downward torsion of the left connecting arm and eliminates the shaking of the seat under external force to a certain extent, the stability of the lifting structure, especially in the vertical and longitudinal directions, still needs to be further optimized.

[0004] In addition, the stability during the lifting process and the simple structure of the existing zero-gravity car seat cannot be balanced. Generally, the simpler the structure is, the more difficult it is to ensure the stability of the car seat during lifting. How to ensure the stability of the zero-gravity car seat during the lifting process with a simple and low-cost lifting structure / mechanism is a problem to be solved. SUMMARY

[0005] In view of the problems in the background art, the present application aims to provide a zero-gravity car seat.

[0006] The purpose of the present application is achieved by the following technical solutions.

[0007] A zero-gravity car seat includes a seat frame bottom seat and a seat frame skeleton located above the seat frame bottom seat. An upper cross beam is arranged at the front of the seat frame skeleton, and a lower cross beam is arranged on the seat frame bottom seat. The upper cross beam and the lower cross beam are connected through a lead screw lifting mechanism, and the lead screw lifting mechanism is located in the middle region of the front of the seat frame. A slide pair is arranged on both sides of the seat frame, and the slide pair can only move up and down. The lead screw lifting mechanism includes a driving motor, the driving motor is connected with a vertically arranged lead screw, a nut seat capable of moving along the lead screw is matched on the lead screw, the nut seat is fixedly connected with a support plate, and the top of the support plate always supports the upper cross beam. As a preferred embodiment, the slide pair can only rotate around the rear cross beam of the seat as the rotation axis. When rotating clockwise, the slide pair moves upward, and when rotating counterclockwise, the slide pair moves downward.

[0008] As preferred, the slide pair comprises a fixed part fixedly connected to the seat frame base, a transverse limiting part fixedly arranged on the fixed part, an annular recess arranged on the transverse limiting part, a movable part vertically arranged on the seat frame skeleton and movable along with the seat frame skeleton, a waist-shaped hole arranged on the movable part, the transverse limiting part passing through the waist-shaped hole, the hole edge of the waist-shaped hole clamping in the annular recess, and the fixed part and the hole edge of the waist-shaped hole in sliding fit; when the seat frame skeleton and the transverse limiting part move upward or downward, the movable part moves from one end to the other end of the waist-shaped hole.

[0009] To further improve the stability of the automobile seat during lifting, the support plate adopts an inverted triangular groove structure, the lower part of the support plate is semi-covered on the nut seat, the lead screw is located in the groove of the support plate, and the upper end of the support plate is provided with an upper arc-shaped clamping hole for clamping the upper cross beam.

[0010] To further improve the safety of the automobile seat during lifting, a reverse supporting part is arranged on the back side of the support plate, the upper end of the reverse supporting part is fixedly connected to the support plate, the lower end of the reverse supporting part is provided with a lower arc-shaped clamping hole for clamping the lower cross beam, and when the nut seat is located at the lower limit position, the lower end of the reverse supporting part is clamped on the lower cross beam.

[0011] As preferred, the upper arc-shaped clamping hole and the lower arc-shaped clamping hole are both provided with two, and the reverse supporting part adopts a U-shaped plate.

[0012] As preferred, the driving motor and its support are fixedly suspended on the lower cross beam, and the suspension point is located inside the two lower arc-shaped clamping holes of the reverse supporting part.

[0013] To consider the flexibility of the automobile seat during lifting, the movable part comprises a metal lubricating bushing with a waist-shaped hole, the metal lubricating bushing is fixed on the side plate, and the side plate is fixed on the seat frame skeleton.

[0014] Beneficial effects: The zero-gravity automobile seat provided by the application has good stability and safety, and a simple and low-cost lifting structure / mechanism is used to ensure the stability and safety of the zero-gravity automobile seat during lifting, the shaking amount of the automobile seat in the transverse, vertical and longitudinal directions is not more than 2mm, compared with the lifting mechanism with an angle adjuster of the same specification, the cost of the lifting structure / mechanism of the automobile seat in the application can be reduced by at least 50 yuan per piece, and the zero-gravity automobile seat provided by the application also has high adjustment accuracy, can be lifted to any height within the allowable range and instantaneously kept stable, and is especially beneficial to maintaining the safety of the automobile seat during automobile collision. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 , Figure 2 , Figure 3 It is a three-dimensional schematic view of the zero-gravity automobile seat in the embodiment.

[0016] Figure 4 This is a schematic diagram of the lifting mechanism of the zero-gravity car seat in the embodiment.

[0017] Figure 5 , Figure 6 , Figure 7 This is a partial schematic diagram of the lifting mechanism of the zero-gravity car seat in the embodiment. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Example

[0019] See Figures 1 to 7 A zero-gravity car seat includes a seat frame base 19 and a seat frame skeleton 16 located above the seat frame base 19. An upper crossbeam 15 is provided at the front of the seat frame skeleton 16, and a lower crossbeam 10 is provided on the seat frame base 19. The upper crossbeam 15 and the lower crossbeam 10 are connected by a screw lifting mechanism located in the middle area of ​​the front of the seat frame. Slide pairs 18 are provided on both sides of the seat frame, and the slide pairs 18 can only move up and down. The screw lifting mechanism includes a drive motor 17 connected to a vertically arranged screw 13. A nut seat 12, movable along the screw 13, is fitted on the screw 13. The nut seat 12 is fixedly connected to a support plate 14, and the top of the support plate 14 always supports the upper crossbeam 15. The slide pairs 18 can only move up and down by rotating around a rear crossbeam 25 of the seat. Figure 2 With the right side as the reference, when rotating clockwise, slide joint 18 moves upward (at this time, seat frame skeleton 16 is raised), and when rotating counterclockwise, slide joint 18 moves downward (at this time, seat frame skeleton 16 is lowered).

[0020] Combination Figure 5 As shown, the slide rail assembly 18 includes a fixing member 20 fixedly connected to the seat frame base 19. A transversely arranged transverse limiting member 22 is fixedly disposed on the fixing member 20. The radial cross-section of the transverse limiting member 22 is circular. An annular recess is provided on the transverse limiting member 22. A vertically arranged movable member 21 that can move with the seat frame frame 16 is provided on the seat frame frame 16. An oblong hole 23 is provided on the movable member 21. The transverse limiting member 22 passes through the oblong hole 23. The edge of the oblong hole 23 is engaged in the annular recess. The fixing member 20 and the edge of the oblong hole 23 are in sliding fit. When the seat frame frame 16 and the transverse limiting member 22 move upward or downward, the movable member 21 moves from one end of the oblong hole 23 to the other end.

[0021] Combination Figure 6 and Figure 7As shown, the support plate 14 adopts an inverted triangular groove structure. The lower part of the support plate 14 partially covers the nut seat 12. The lead screw 13 is located in the groove of the support plate 14. The upper end of the support plate 14 is provided with an upper arc-shaped slot for locking the upper crossbeam 15. A reverse support member 11 is provided on the back side of the support plate 14. The upper end of the reverse support member 11 is fixedly connected to the support plate 14. The lower end of the reverse support member 11 is provided with a lower arc-shaped slot for locking the lower crossbeam 10. When the nut seat 12 is at the lower limit position, the lower end of the reverse support member 11 is just locked on the lower crossbeam 10. There are two upper arc-shaped bayonets and two lower arc-shaped bayonets. The reverse support 11 adopts a U-shaped plate. The drive motor 17 and its support are fixedly suspended on the lower crossbeam 10, and the suspension point is located inside the two lower arc-shaped bayonets of the reverse support 11. The movable part 21 includes a metal lubrication bushing with a waist-shaped hole 23. The metal lubrication bushing is fixed on the side plate 24, and the side plate 24 is fixed on the seat frame skeleton 16.

[0022] During use, the zero-gravity car seat is in Figure 2 , Figure 5 and Figure 6 In the indicated state, the nut seat 12 is located below the lead screw 13, and the lower arc-shaped latch at the lower end of the reverse support 11 is precisely engaged with the lower crossbeam 10. The lateral limiting member 22 is located at the upper end of the waist-shaped hole 23. When it is necessary to raise the seat cushion / seat frame, the drive motor 17 is controlled to run in the forward direction to drive the lead screw 13 to rotate, thereby causing the nut seat 12 to move upward along the lead screw 13. During this process, the upper arc-shaped latch at the upper end of the support plate 14 always engages and supports the upper crossbeam 15, while the lower arc-shaped latch separates from the lower crossbeam 10, and the lateral limiting member 22 slides upward along the waist-shaped hole 23. After the seat cushion / seat frame is raised to the specified height, the zero-gravity car seat is in a state of equilibrium. Figure 4 In the indicated state, the lateral limiting member 22 is located at the lower end of the waist-shaped hole 23, and the nut seat 12 is located above the lead screw 13. The lead screw 13, the nut seat 12, and the support plate 14 jointly support the upper crossbeam 15, thereby supporting the seat cushion / frame. When it is necessary to lower the height of the seat cushion / frame, it is only necessary to control the direction of the drive motor 17 to move it downward, thereby driving the nut seat 12 to move downward. During this process, the upper arc-shaped latch at the upper end of the support plate 14 always locks and supports the upper crossbeam 15, while the lateral limiting member 22 slides downward along the waist-shaped hole 23. When the nut seat 12 moves downward along the lead screw 13 to the designated position, the lower arc-shaped latch at the lower end of the reverse support member 11 just locks onto the lower crossbeam 10.

[0023] In this design, the upper crossbeam 15 is always supported and held by the screw lifting mechanism located in the middle of the front part of the seat frame, while the upper crossbeam 15 is limited in both the longitudinal and vertical directions. The slide rails 18 on both sides of the seat frame provide auxiliary support and limit the lateral and longitudinal directions of the seat frame frame 16. The screw lifting mechanism and slide rails 18 with this specific structure work together to ensure the stability and safety of the zero-gravity car seat during the lifting process with a simple and low-cost lifting structure / mechanism.

[0024] In this solution, the amount of sway in the horizontal, vertical, and longitudinal directions does not exceed 2mm. Compared with the same specification lifting mechanism with an angle adjuster, the cost of the lifting structure / mechanism of the car seat in this invention can be reduced by at least fifty yuan per unit. It also has high adjustment accuracy, and can be raised and lowered to any height within the allowable range and remain stable instantly, which is especially beneficial to maintaining the safety of the car seat during a car collision.

Claims

1. A zero-gravity car seat, comprising a seat frame base (19) and a seat frame skeleton (16) located above the seat frame base (19), wherein an upper crossbeam (15) is provided at the front of the seat frame skeleton (16), and a lower crossbeam (10) is provided on the seat frame base (19), characterized in that: The upper crossbeam (15) and the lower crossbeam (10) are connected by a screw lifting mechanism, which is located in the middle area of ​​the front of the seat frame. Slide pairs (18) are provided on both sides of the seat frame, and the slide pairs (18) can only move up and down. The screw lifting mechanism includes a drive motor (17), which is connected to a vertically arranged screw (13). A nut seat (12) that can move along the screw (13) is fitted on the screw (13). The nut seat (12) is fixedly connected to a support plate (14), and the top of the support plate (14) always supports the upper crossbeam (15). The slide pairs (18) include those fixedly connected to the seat frame base (1...). 9) The fixing part (20) is fixedly provided with a transversely arranged transverse limiting part (22), and an annular recess is provided on the transverse limiting part (22). The seat frame frame (16) is provided with a vertically arranged movable part (21) that can move with the seat frame frame (16). The movable part (21) is provided with a waist-shaped hole (23). The transverse limiting part (22) passes through the waist-shaped hole (23). The edge of the waist-shaped hole (23) is stuck in the annular recess. The fixing part (20) and the edge of the waist-shaped hole (23) are in sliding fit. The slide pair (18) can only move up and down and rotates with the rear crossbeam (25) of the seat as the rotation axis.

2. The zero-gravity car seat according to claim 1, characterized in that: The support plate (14) adopts an inverted triangular groove structure. The lower part of the support plate (14) is partially covered on the nut seat (12). The lead screw (13) is located in the groove of the support plate (14). The upper end of the support plate (14) is provided with an upper arc-shaped bayonet for locking the upper crossbeam (15).

3. The zero-gravity car seat according to claim 2, characterized in that: A reverse support member (11) is provided on the back side of the support plate (14). The upper end of the reverse support member (11) is fixedly connected to the support plate (14). The lower end of the reverse support member (11) is provided with a lower arc-shaped slot for locking the lower crossbeam (10). When the nut seat (12) is in the lower limit position, the lower end of the reverse support member (11) is just locked on the lower crossbeam (10).

4. The zero-gravity car seat according to claim 3, characterized in that: There are two upper arc-shaped bayonets and two lower arc-shaped bayonets. The reverse support (11) adopts a U-shaped plate.

5. The zero-gravity car seat according to claim 4, characterized in that: The drive motor (17) and its support are fixedly suspended on the lower crossbeam (10), and the suspension point is located inside the two lower arc-shaped bayonets of the reverse support (11).

6. The zero-gravity car seat according to claim 5, characterized in that: The movable part (21) includes a metal lubrication bushing with a waist-shaped hole (23), the metal lubrication bushing being fixed to the side plate (24), the side plate (24) being fixed to the seat frame (16).

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