Zero-gravity seat and seat framework thereof

Abstract

The utility model discloses a zero-gravity seat framework, which can realize linkage adjustment of angles of a cushion framework and a backrest framework, and adopts the following principle that a first angle adjuster drives a first connecting plate and a second connecting plate to rotate towards opposite directions; the second connecting plate rotates relative to the supporting frame to adjust the front-back position and height of the first angle adjuster, on one hand, the cushion framework can be driven to slide along the sliding rail, and on the other hand, the inclination angle of the cushion framework is adjusted by adjusting the height of the rear end of the cushion framework; in the process that the second connecting plate rotates relative to the supporting frame, the guide shaft is driven to move along the arc sliding groove, then the second end of the connecting rod is driven to move along the arc sliding groove, the backrest framework can be driven to rotate around a hinge shaft between the backrest framework and the cushion framework, and the purpose of adjusting the angle of the backrest framework is achieved. In conclusion, according to the zero-gravity seat and the seat framework thereof, the inclination angles of the seat cushion and the backrest can be adjusted in a linkage mode.

Description

Technical Field

[0001] The utility model relates to a seat, in particular to a zero-gravity seat and a seat frame thereof. Background Art

[0002] Zero-gravity seats are designed to create a relaxed state similar to weightlessness in outer space to improve riding comfort. A Chinese patent with publication number CN208682692U discloses a zero-gravity seat for automobiles, including a seat frame frame, the front end of which is connected to a leg rest through a flip mechanism, and the rear end is equipped with a seat back through an angle adjuster, a mounting base is provided below the seat frame frame, the rear end of which is hinged on the mounting base, and an inclination adjustment mechanism is provided between the front end and the mounting base, the inclination adjustment mechanism includes a threaded seat hinged on the lower side of the seat frame frame, a gear box hinged on the upper side of the mounting base, and a screw with one end mounted in the gear box and the other end threadedly matched with the threaded seat, the gear box is built with a mutually meshing turbine and worm, wherein the turbine is sleeved on the screw, and the worm is connected to a drive motor at the end away from the meshing with the turbine.

[0003] The zero-gravity seat for automobiles is composed of a tilt adjustment mechanism consisting of a threaded seat, a gear box and a screw rod. Although the tilt angle of the seat frame skeleton relative to the mounting base can be adjusted, the weight will eventually be transferred from the screw rod to the mounting base, that is, there is stress concentration at the screw rod, resulting in a short service life of the screw rod or even breakage of the screw rod; the seat back is adjusted by an angle adjuster, that is, the seat frame angle and the seat back angle are adjusted separately, resulting in a more complicated adjustment process; after the slide rail is set, if the seat frame skeleton is tilted relative to the mounting base under the action of the tilt adjustment mechanism, a large gravity component force will be applied to the slide rail mechanism, resulting in instability of the receiving structure at the slide rail. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a zero-gravity chair and a seat frame thereof, which can adjust the inclination angle of the seat cushion and the backrest in a linked manner.

[0005] In order to achieve the above object, the utility model provides the following technical solutions:

[0006] The utility model firstly proposes a zero-gravity chair frame, comprising a seat frame frame and a backrest frame, wherein the backrest frame is located at the rear side of the seat frame frame;

[0007] The seat frame frame includes a support frame and a seat cushion frame, the support frame is provided with a slide rail, the slide rail is provided with a slider that slides with the slide rail, and the slider is hingedly connected to the seat cushion frame;

[0008] A linkage adjustment mechanism is provided between the seat frame frame and the backrest frame;

[0009] The linkage adjustment mechanism includes a first angle adjuster, and a first output gear plate and a second output gear plate are respectively provided on both sides of the first angle adjuster; the seat cushion frame includes a first connecting plate, and the first connecting plate rotates synchronously with the first output gear plate; the second output gear plate is provided with a second connecting plate that rotates synchronously with the second output gear plate, and the second connecting plate is hingedly connected to the support frame;

[0010] The first connecting plate is hingedly connected to the backrest frame, and a connecting rod is further provided between the first connecting plate and the backrest frame, and a first end of the connecting rod is hingedly connected to the backrest frame;

[0011] The first connecting plate is provided with an arc groove coaxial with the first angle adjuster, the second connecting plate is provided with a guide shaft slidably matched with the arc groove, and the second end of the connecting rod is rotationally matched with the guide shaft.

[0012] Furthermore, the slide rails are provided in two numbers and are respectively located on the left and right sides of the support frame, and the linkage adjustment mechanism is respectively provided between the left and right sides of the seat cushion frame and the left and right sides of the backrest frame.

[0013] Furthermore, a first synchronization shaft is provided between the first angle adjusters of the two linkage adjustment mechanisms;

[0014] It also includes a first power device drivingly connected to the first synchronization shaft.

[0015] Furthermore, the first power device includes a first angle adjustment motor and a first transmission box, a double-hinged connecting rod is provided between the first transmission box and the first connecting plate, and the first angle adjustment motor is fixedly mounted on the first transmission box; the input shaft of the first transmission box is transmission-connected to the first angle adjustment motor, and the output shaft of the first transmission box is transmission-connected to the first synchronization shaft.

[0016] Furthermore, the first connecting plates are provided in two pieces and are respectively located on the left and right sides of the seat cushion frame, and a first fixed axis and a second fixed axis are respectively provided between the front and rear ends of the two first connecting plates.

[0017] Furthermore, armrests are respectively provided on the left and right sides of the backrest frame.

[0018] Furthermore, a headrest frame is provided above the backrest frame, and second angle adjusters are respectively provided between the left and right sides of the headrest frame and the left and right sides of the backrest frame, a second synchronization shaft is provided between the two second angle adjusters, and a second power device transmission-connected to the second synchronization shaft is installed on the backrest frame.

[0019] Further, the second power device includes a second angle-adjusting motor and a second transmission case. The second transmission case is fixedly installed on the backrest frame, and the second angle-adjusting motor is fixedly installed on the second transmission case. The input shaft of the second transmission case is in transmission connection with the second angle-adjusting motor, and the output shaft of the second transmission case is in transmission connection with the second synchronizing shaft.

[0020] Further, the slide rail is an inclined slide rail with a higher front end and a lower rear end.

[0021] Further, it further includes a leg rest assembly. The leg rest assembly includes a leg rest and a leg rest adjusting mechanism for adjusting the inclination angle of the leg rest relative to the seat cushion frame.

[0022] The present utility model also provides a zero-gravity seat, which includes the zero-gravity seat frame as described above.

[0023] The beneficial effects of the present utility model are as follows:

[0024] The zero-gravity seat frame of the present utility model can realize the linkage adjustment of the angles of the seat cushion frame and the backrest frame. The principle is as follows: The first angle adjuster drives the first connecting plate and the second connecting plate to rotate in opposite directions, and makes the second connecting plate rotate relative to the support frame to adjust the front-back position and height of the first angle adjuster. On the one hand, it can drive the seat cushion frame to slide along the slide rail, and on the other hand, it can adjust the inclination angle of the seat cushion frame by adjusting the height of the rear end of the seat cushion frame; when the second connecting plate rotates relative to the support frame, it drives the guide shaft to move along the arc-shaped chute, and further drives the second end of the connecting rod to move along the arc-shaped chute, so that the backrest frame can be driven to rotate around the hinge shaft between it and the seat cushion frame, achieving the purpose of adjusting the angle of the backrest frame; In summary, the zero-gravity seat frame of the present utility model can linkage-adjust the inclination angles of the seat cushion and the backrest. Description of the Drawings

[0025] In order to make the purpose, technical solution and beneficial effects of the present utility model clearer, the present utility model provides the following drawings for illustration:

[0026] Figure 1 It is a schematic structural diagram of an embodiment of the zero-gravity seat frame of the present utility model;

[0027] Figure 2 For Figure 1 the A-A cross-sectional view of

[0028] Figure 3 For Figure 1 the B-B cross-sectional view of

[0029] Figure 4 For Figure 1 the axonometric drawing of

[0030] Figure 5 Isometric view of the zero-gravity seat frame in the folded state;

[0031] Figure 6 Side view of the zero-gravity seat frame in the folded state.

[0032] Explanation of reference numerals:

[0033] 10 - Support frame; 11 - Slide rail; 12 - Slide block; 13 - Hinge plate;

[0034] 20 - Cushion frame; 21 - First connecting plate; 22 - Arc chute; 23 - First fixed shaft; 24 - Second fixed shaft;

[0035] 30 - Backrest frame; 31 - Armrest;

[0036] 41 - First angle adjuster; 42 - Second connecting plate; 43 - Connecting rod; 44 - Guide shaft; 45 - First synchronizing shaft; 46 - First angle adjustment motor; 47 - First transmission box; 48 - Double hinge link;

[0037] 50 - Headrest frame; 51 - Second angle adjuster; 52 - Second synchronizing shaft; 53 - Third connecting plate; 54 - Fourth connecting plate; 55 - Second angle adjustment motor; 56 - Second transmission box;

[0038] 60 - Leg rest. Detailed implementation manners

[0039] The following further illustrates the present utility model in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the exemplified embodiments shall not be construed as limiting the present utility model.

[0040] As Figures 1-5 shown, the zero-gravity seat frame of this embodiment includes a seat frame and a backrest frame 30, and the backrest frame 30 is located at the rear side of the seat frame. Specifically, the seat frame includes a support frame 10 and a cushion frame 20. A slide rail 11 is provided on the support frame 10, and a slide block 12 that is slidably engaged with it is provided on the slide rail 11. The slide block 12 is hingedly connected to the front end or the middle part of the cushion frame 20. In this embodiment, a hinge plate 13 is installed on the slide block 12, and the hinge plate 13 is hingedly connected to the front end or the middle part of the cushion frame 20. In the preferred implementation manner of this embodiment, the slide rail 11 is an inclined slide rail with a higher front end and a lower rear end. In this way, the cushion frame 20 can have a certain initial inclination angle to improve comfort.

[0041] In this embodiment, a linkage adjustment mechanism is provided between the seat frame frame and the backrest frame 30. Specifically, the linkage adjustment mechanism of this embodiment includes a first angle adjuster 41, and a first output gear disc and a second output gear disc are provided on both sides of the first angle adjuster 41. The cushion frame 20 includes a first connecting plate 21, and the first connecting plate 21 rotates synchronously with the first output gear disc. The second output gear disc is provided with a second connecting plate 42 that rotates synchronously with it, and the second connecting plate 42 is hingedly connected to the support frame 10. In this embodiment, the first connecting plate 21 is hingedly connected to the backrest frame 30, and a connecting rod 43 is also provided between the first connecting plate 21 and the backrest frame 30, and the first end of the connecting rod 43 is hingedly connected to the backrest frame 30. In this embodiment, the first connecting plate 21 is provided with an arc groove 22 coaxial with the first angle adjuster 41, and the second connecting plate 42 is provided with a guide shaft 44 that slides with the arc groove 22, and the second end of the connecting rod 43 is rotationally matched with the guide shaft 44.

[0042] Specifically, the principle of linkage adjustment of the inclination angle of the seat cushion frame 20 and the backrest frame 30 in this embodiment is as follows: the first connecting plate 21 and the second connecting plate 42 are driven to rotate in opposite directions by the first angle adjuster 41, and the second connecting plate 42 is rotated relative to the support frame 10 to adjust the front and rear position and height of the first angle adjuster 41. On the one hand, the seat cushion frame 20 can be driven to slide along the slide rail 11, and on the other hand, the inclination angle of the seat cushion frame 20 is adjusted by adjusting the rear end height of the seat cushion frame 20; when the second connecting plate 42 rotates relative to the support frame 10, the guide shaft 44 is driven to move along the circular arc groove 22, and then the second end of the connecting rod 43 is driven to move along the circular arc groove 22, so that the backrest frame 30 can be driven to rotate around the hinge axis between it and the seat cushion frame 20, thereby achieving the purpose of adjusting the angle of the backrest frame.

[0043] Specifically, in the present embodiment, two slide rails 11 are provided and are respectively located on the left and right sides of the support frame 10, and linkage adjustment mechanisms are respectively provided between the left and right sides of the cushion frame 20 and the left and right sides of the backrest frame 30, and a first synchronization shaft 45 is provided between the first angle adjusters 41 of the two linkage adjustment mechanisms. In the present embodiment, the zero-gravity seat frame also includes a first power device that is transmission-connected to the first synchronization shaft. The first power device of the present embodiment includes a first angle adjustment motor 46 and a first transmission box 47, a double-hinged connecting rod 48 is provided between the first transmission box 47 and the first connecting plate 21, and the first angle adjustment motor 46 is fixedly mounted on the first transmission box 47; the input shaft of the first transmission box 47 is transmission-connected to the first angle adjustment motor 46, and the output shaft of the first transmission box 47 is transmission-connected to the first synchronization shaft 45. In this way, the two first angle adjusters 41 can be driven to rotate synchronously by the first power device.

[0044] In this embodiment, the hinge plate 13 is hingedly connected to the first connecting plate 21. In this embodiment, the first connecting plates 21 are provided in two pieces and are respectively located on the left and right sides of the seat cushion frame 20. A first fixed shaft 23 and a second fixed shaft 24 are respectively provided between the front and rear ends of the two first connecting plates 21, improving the structural stability and reliability between the seat cushion frame 20 and the two first connecting plates 21.

[0045] In this embodiment, armrests 31 are respectively provided on the left and right sides of the backrest frame 30. A headrest frame 50 is provided above the backrest frame of this embodiment. Second angle adjusters 51 are respectively provided between the left and right sides of the headrest frame 50 and the left and right sides of the backrest frame 30. A second synchronous shaft 52 is provided between the two second angle adjusters 51, and a second power device drivingly connected to the second synchronous shaft 52 is installed on the backrest frame 30. Specifically, the second angle adjuster 51 includes a third output gear disc and a fourth output gear disc located on its two sides. A third connecting plate 53 that rotates synchronously therewith is provided on the third output gear disc, and the third connecting plate 53 is fixedly connected to the backrest frame 30. A fourth connecting plate 54 that rotates synchronously therewith is provided on the fourth output gear disc, and the fourth connecting plate 54 is fixedly connected to the headrest frame 50. The second power device of this embodiment includes a second angle adjustment motor 55 and a second transmission case 56. The second transmission case 56 is fixedly installed on the backrest frame 30, and the second angle adjustment motor 55 is fixedly installed on the second transmission case 56; the input shaft of the second transmission case 56 is drivingly connected to the second angle adjustment motor 55, and the output shaft of the second transmission case 56 is drivingly connected to the second synchronous shaft 52.

[0046] The zero-gravity seat frame of this embodiment further includes a leg rest assembly. The leg rest assembly includes a leg rest 60 and a leg rest adjustment mechanism (not shown in the figure) for adjusting the inclination angle of the leg rest relative to the seat cushion frame 20.

[0047] This embodiment also proposes a zero-gravity seat, including the zero-gravity seat frame as described above in this embodiment.

[0048] The above-described embodiments are only preferred embodiments cited to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention is subject to the claims.

Claims

1. A zero-gravity chair frame, characterized in that: It comprises a seat frame frame and a backrest frame, wherein the backrest frame is located at the rear side of the seat frame frame; The seat frame frame includes a support frame and a seat cushion frame, the support frame is provided with a slide rail, the slide rail is provided with a slider that slides with the slide rail, and the slider is hingedly connected to the seat cushion frame; A linkage adjustment mechanism is provided between the seat frame frame and the backrest frame; The linkage adjustment mechanism includes a first angle adjuster, and a first output gear plate and a second output gear plate are respectively provided on both sides of the first angle adjuster; the seat cushion frame includes a first connecting plate, and the first connecting plate rotates synchronously with the first output gear plate; the second output gear plate is provided with a second connecting plate that rotates synchronously with the second output gear plate, and the second connecting plate is hingedly connected to the support frame; The first connecting plate is hingedly connected to the backrest frame, and a connecting rod is further provided between the first connecting plate and the backrest frame, and a first end of the connecting rod is hingedly connected to the backrest frame; The first connecting plate is provided with an arc groove coaxial with the first angle adjuster, the second connecting plate is provided with a guide shaft slidably matched with the arc groove, and the second end of the connecting rod is rotationally matched with the guide shaft.

2. The zero-gravity chair frame according to claim 1, characterized in that: The slide rails are provided in two numbers and are respectively located on the left and right sides of the support frame; the linkage adjustment mechanisms are respectively provided between the left and right sides of the seat cushion frame and the left and right sides of the backrest frame; a first synchronization shaft is provided between the first angle adjusters of the two linkage adjustment mechanisms; It also includes a first power device drivingly connected to the first synchronization shaft.

3. The zero-gravity chair frame according to claim 2, characterized in that: The first power device includes a first angle adjustment motor and a first transmission box. A double-hinged connecting rod is provided between the first transmission box and the first connecting plate. The first angle adjustment motor is fixedly mounted on the first transmission box. The input shaft of the first transmission box is transmission-connected to the first angle adjustment motor, and the output shaft of the first transmission box is transmission-connected to the first synchronization shaft.

4. The zero-gravity chair frame according to claim 1, characterized in that: The first connecting plates are provided in two pieces and are respectively located at the left and right sides of the seat cushion frame, and a first fixed axis and a second fixed axis are respectively provided between the front and rear ends of the two first connecting plates.

5. The zero-gravity chair frame according to claim 1, characterized in that: Armrests are respectively arranged on the left and right sides of the backrest frame.

6. The zero-gravity chair frame according to claim 1, characterized in that: A headrest frame is provided above the backrest frame, and second angle adjusters are respectively provided between the left and right sides of the headrest frame and the left and right sides of the backrest frame, a second synchronization shaft is provided between the two second angle adjusters, and a second power device transmission-connected to the second synchronization shaft is installed on the backrest frame.

7. The zero-gravity chair frame according to claim 6, characterized in that: The second power device includes a second angle adjustment motor and a second transmission box. The second transmission box is fixedly mounted on the backrest frame, and the second angle adjustment motor is fixedly mounted on the second transmission box. The input shaft of the second transmission box is transmission-connected to the second angle adjustment motor, and the output shaft of the second transmission box is transmission-connected to the second synchronization shaft.

8. The zero-gravity chair frame according to claim 1, characterized in that: The slide rail is an inclined slide rail with a high front and a low back.

9. The zero-gravity chair frame according to claim 1, characterized in that: It also includes a leg rest assembly, which includes a leg rest and a leg rest adjustment mechanism for adjusting the inclination angle of the leg rest relative to the seat cushion frame.

10. A zero-gravity chair, characterized in that: Comprising a zero-gravity chair frame as described in any one of claims 1-9.

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