A high-comfort zero-gravity seat frame mechanism

Abstract

The present invention provides a high-comfort zero-gravity seat frame mechanism, which belongs to the field of automobile seat technology. It is composed of a six-bar mechanism driven by a group of angle adjusters, which can realize the synchronous adjustment of four actions, namely backrest angle adjustment, elevation adjustment, H-point adaptive adjustment and cushion stiffness adjustment. It completely solves the serious discomfort problem caused by the discontinuity of the cushion backrest during the adjustment process of the existing zero-gravity seat mechanism. The six-bar components are small in number, simple and reliable in structure, and achieve the best cost performance. The left and right stiffness / strength of the entire structure are completely symmetrical, and the two sides are synchronously locked. Combined with the leg rest and the horizontal and vertical adjustment mechanism, a high-comfort zero-gravity seat mechanism can be formed, and the zero-gravity posture position can be achieved with one click without complex electronic control. The posture adjustment requirements for high-end seat comfort and the needs of cockpit space matching are realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile seats, and specifically relates to a high-comfort zero-gravity seat frame mechanism. Background Art

[0002] Patent No. CN202110643449.X discloses the invention patent of "An automatically adjustable zero-gravity seat structure and automobile". The invention is driven by a double-sided electric screw to achieve inclination adjustment, which is costly and not conducive to mass production; it uses dual motors to drive unified action, and synchronization is difficult to ensure, resulting in seat torsional shaking or even jamming; the screw bears radial loads, and the stiffness and strength cannot be guaranteed; as the screw is adjusted, the load span is constantly changing, and the structural stability is poor; the adjustment noise is loud; and it cannot solve the waist-pushing problem caused by the surface segment difference between the seat cushion and the backrest during the adjustment process.

[0003] Patent No. CN201910782504.6 discloses the invention patent of "Zero Gravity Seat and Automobile Including the Same". The backrest and seat cushion of this invention are adjusted synchronously, and can only be used as a single-function dedicated seat structure, and its usage is limited; in order to reduce the surface step difference between the seat cushion and the backrest during the adjustment process, the backrest rotation center is very close to the center of the rear upper connecting rod of the seat cushion, which makes it easy for the backrest and the seat cushion to interfere with each other during rotation, which greatly restricts the shape; it cannot solve the waist-pushing problem caused by the surface step difference between the seat cushion and the backrest during the adjustment process.

[0004] Patent No. CN202111340091.X discloses an invention patent for "a zero-gravity seat frame with lateral avoidance". The lateral avoidance function of this invention only provides lateral sliding, and the user needs to identify the adjustment space by himself, which is not convenient enough; its inclination adjustment adopts a double adjuster, which has a complex structure, high cost, and synchronization problems; it cannot solve the waist-pushing problem caused by the surface difference between the seat cushion and the backrest during the adjustment process.

[0005] Patent No. CN202110854026.2 discloses an invention patent for a "zero-gravity seat frame adjustment system". The inclination motor of this invention is arranged at the front end of the slide rail, encroaching on the space under the seat cushion, which is very limited in the actual structural layout; it adopts a double angle adjuster and an internal gear plate, which has a complex structure and high cost; it cannot solve the waist-pushing problem caused by the surface segment difference between the seat cushion and the backrest during the adjustment process. Summary of the Invention

[0006] In response to the deficiencies in the prior art, the present invention provides a high-comfort zero-gravity seat frame mechanism, which consists of a six-bar mechanism driven by a set of angle adjusters. It can realize the synchronous adjustment of four actions, namely, backrest angle adjustment, tilt adjustment, H-point adaptive adjustment and cushion stiffness adjustment, and completely solve the serious discomfort problem caused by the discontinuity of the cushion backrest during the adjustment process of the existing zero-gravity seat mechanism. The six-bar components are small in number, simple and reliable in structure, and achieve the best cost-effectiveness. The left and right stiffness / strength of the entire structure are completely symmetrical, and the two sides are synchronously locked. Combined with the leg rest and the horizontal and vertical adjustment mechanism, a high-comfort zero-gravity seat mechanism can be constructed, which can achieve the zero-gravity posture position with one click without complex electronic control. The posture adjustment requirements for high-end seat comfort and the needs of cockpit space matching are realized.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a high-comfort zero-gravity chair frame mechanism, comprising: a backrest frame, a seat cushion frame, a drive mechanism, and a plurality of rods, wherein the backrest frame is a frame-shaped structure, the backrest frame and the seat cushion frame are hingedly connected, the drive mechanism drives the backrest frame to rotate relative to the seat frame, and the backrest frame near the ground is hingedly connected to a first rod and one end of a first shaft rod.

[0008] The other end of the first rod is hinged to one end of the second rod, the third rod and the fourth axis rod respectively, the other end of the second rod is connected to the seat frame or is hinged to the seat frame through the second axis rod, the other end of the third rod is hinged to the fourth rod through the third axis rod, one end of the fourth rod is hinged to the seat cushion frame, and the other end of the fourth rod is connected to the leg support mechanism through the fifth axis rod.

[0009] Furthermore, the driving mechanism includes a motor, a recliner and a synchronous connecting rod, wherein the motor and the recliner are arranged on the backrest frame, the motor drives the recliner to rotate through the synchronous connecting rod, and the recliner drives the backrest frame to rotate relative to the seat cushion frame.

[0010] Furthermore, it also includes a seat cushion spring, the first rod and the backrest frame hinge point are hinged to the first shaft rod, the third rod and the fourth rod hinge point are hinged to the third shaft rod, and the two ends of the seat cushion spring are respectively connected to the first shaft rod and the third shaft rod.

[0011] Furthermore, the other end of the fourth rod is fixedly connected to the fifth shaft rod, and the fifth shaft rod is connected to the leg support mechanism.

[0012] Furthermore, the bottom surface of the seat cushion frame is provided with a transverse slide rail and a longitudinal slide rail.

[0013] Furthermore, the seat spring is a serpentine steel wire, and the seat spring is provided with more than one

[0014] Furthermore, the first rod and the second rod hinge point are hinged to the fourth axis rod.

[0015] Furthermore, the second rod is sleeved with the second shaft rod, and the second shaft rod is hinged to the seat cushion frame.

[0016] Compared with the prior art, the present invention provides a high-comfort zero-gravity seat frame mechanism with the following beneficial effects:

[0017] (1) A simple six-bar mechanism driven by only one set of angle adjusters can achieve synchronous adjustment of four actions, achieving the best cost-effectiveness;

[0018] (2) The entire structure has completely symmetrical left and right stiffness / strength, and is locked synchronously on both sides;

[0019] (3) The positions of the connecting rods are interlocked in real time, which can solve the problem of uncontrolled movement caused by the collinearity of the connecting rods and increase the effective stroke;

[0020] (4) Solve the problem of discontinuity and fully realize the smooth transition from different sitting postures to zero gravity posture, and can adapt to the back gravity;

[0021] (5) The seat cushion can be adjusted in a synchronous manner. As the lying angle of the human body increases, the seat cushion support will become softer, thus improving the comfort experience.

[0022] (6) Changes in safety requirements only affect the strength of the recliner and base and have nothing to do with other parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the motor of the present invention.

[0024] Figure 2 Schematic diagram of the angle adjuster of the present invention.

[0025] Figure 3 Schematic diagram of the three-dimensional structure of the present invention.

[0026] Figure 4 Schematic diagram of the rod and shaft of the present invention.

[0027] Figure 5 Schematic diagram of the leg rest and slide rail of the present invention.

[0028] Figure 6 Schematic diagram of the principle of the present invention.

[0029] In the picture:

[0030] 1-backrest frame; 2-seat cushion frame; 3-motor; 4-synchronizing connecting rod; 5-angle adjuster; 6-first rod; 7-second rod; 8-third rod; 9-fourth rod; 10-seat cushion spring; 11-first axis rod; 12-second axis rod; 13-third axis rod; 14-fourth axis rod; 15-fifth axis rod; 16-leg support mechanism; 17-longitudinal slide rail; 18-transverse slide rail. DETAILED DESCRIPTION

[0031] It should be noted that in the description of the present invention, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction.

[0032] In the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, "fixed" can refer to fixed connection, detachable connection, or integration; connection can refer to mechanical connection or electrical connection; connection can refer to direct connection or indirect connection through an intermediate medium, and can refer to internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0033] The invention relates to a high-comfort zero-gravity seat frame mechanism.

[0034] The backrest frame 1 is a frame-shaped structure. When it is normally placed, the end closest to the ground is point A.

[0035] The backrest frame 1 and the seat cushion frame 2 are hinged, and the hinge point is closer to point A.

[0036] There is one motor 3, which is arranged on either side of the vertical frame of the backrest frame 1.

[0037] One or two recliners 5 are welded to the vertical frame of the backrest frame 1 .

[0038] The motor 3 drives the synchronous connecting rod 4 , and the synchronous connecting rod 4 drives the recliner 5 , and the recliner 5 causes the backrest frame 1 to rotate relative to the seat cushion frame 2 .

[0039] One end of the first rod 6 is hinged to the backrest frame 1 at point A, point A is hinged to the first shaft rod 11, and the other end of the first rod 6 is hinged to one end of the second rod 7 and the third rod 8.

[0040] The other end of the second rod 7 is hinged to the seat cushion frame 2 , or sleeved on the second shaft rod 12 , and the second shaft rod 12 is hinged to the seat cushion frame 2 .

[0041] The other end of the third rod 8 is sleeved on the third shaft rod 13, and the third shaft rod 13 is hinged on the fourth rod 9, with the hinge point being point B.

[0042] One end of the fourth rod 9 is hinged to the seat cushion frame 2 .

[0043] One end of the seat spring 10 is connected to the first shaft 11 , and the other end is connected to the third shaft 13 .

[0044] There are two first rods 6, two second rods 7, two third rods 8 and two fourth rods 9, which are symmetrically arranged.

[0045] The seat cushion spring 10 is a serpentine steel wire.

[0046] The first rod 6 , the second rod 7 and the third rod 8 are rotatably sleeved on the fourth shaft rod 14 .

[0047] The other end of the fourth rod 9 is fixedly connected to the fifth shaft rod 15 , and the fifth shaft rod 15 is connected to the leg support mechanism 16 .

[0048] When the seat cushion frame 2 is placed normally, a longitudinal slide rail 17 and a transverse slide rail 18 are further provided on the side close to the ground.

[0049] As shown in the schematic, based on the viewing angle, motor 3 drives the bilateral recliners 5, causing the backrest frame 1 to rotate counterclockwise. The lower endpoint A of the backrest frame 1 pushes the first rod 6 to the right, which in turn pushes the second rod 7 clockwise. The third rod 7 rotates counterclockwise under the combined action of the first and fourth rods 9. The seat spring 10 (attached between points A and B) moves upward and rightward under the action of these rods, rotating counterclockwise around point A (raising point B). Simultaneously, the distance between points A and B decreases. The return motion follows the same principle, but in reverse.

[0050] The angle of the backrest frame 1 is adjusted to the backrest rotation;

[0051] The elevation angle is adjusted by changing the angle between the second rod 7 and the third rod 8;

[0052] H point adaptive adjustment means that when the backrest rotates, the seat cushion spring 10 (line connecting points AB) moves upward and rightward to completely solve the waist-pushing problem caused by the seat back gap;

[0053] The H-point is a common name in car interior development, referring to the intersection of the torso line and the thigh line.

[0054] The seat cushion stiffness is adjusted so that the distance between points A and B is the smallest in a zero-gravity state (semi-reclining posture), the preload of the seat cushion spring 10 hanging between points A and B is the smallest, and the occupant feels that the seat cushion has become softer. When the seat cushion is adjusted back to the normal sitting posture, the distance between points A and B is the largest, so that the preload of the seat cushion spring 10 is the largest, and the occupant feels that the seat cushion has become harder.

[0055] The above four actions are performed synchronously under the drive of motor 3.

[0056] It is also equipped with a longitudinal slide rail 17 , a transverse slide rail 18 and a leg support mechanism 16 .

[0057] The electric backrest has a double recliner 5. In this solution, the left and right mechanisms of the seat cushion frame 2 are completely symmetrical, driven by the same motor 3 and locked by the recliner 5, so the strength / rigidity is consistent on both sides.

[0058] For cost reasons, seat cushion frames are typically designed with quasi-symmetrical left and right structures, but only lock on one side. Consequently, existing products / patents either lock on one side or, due to insufficient strength, add locking mechanisms on both sides. This solution utilizes the existing backrest motor and recliner to achieve four movements through a simple connecting rod, offering significant advantages in cost and stability.

[0059] In addition to the slide rails and leg rests, a combination of four actions is required to achieve a highly comfortable zero-gravity state. Existing products / patents require a dedicated drive and locking mechanism for each action. To achieve one-click positioning, multiple motors must be controlled simultaneously through the seat controller (memory box). This solution only has one drive motor, which is very simple to implement and does not require complex electronic control.

[0060] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will be able to modify the technical solutions described in the foregoing embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A high-comfort zero-gravity seat frame structure, characterized in that: include: A backrest frame, a seat cushion frame, a driving mechanism and multiple rods, wherein the backrest frame is a frame-shaped structure, the backrest frame is hinged to the seat cushion frame, the driving mechanism drives the backrest frame to rotate relative to the seat cushion frame, the backrest frame near the ground is hinged to one end of the first rod and the first shaft rod, the other end of the first rod is hinged to the second rod, the third rod and one end of the fourth shaft rod respectively, the other end of the second rod is hinged to the seat cushion frame, the other end of the third rod is hinged to the fourth rod through the third shaft rod, one end of the fourth rod is hinged to the seat cushion frame, the other end of the fourth rod is connected to the leg support mechanism through the fifth shaft rod, the driving mechanism includes a motor, an angle adjuster and a synchronous connecting rod, the motor and the angle adjuster are arranged on the backrest frame, and the motor is connected to the leg support mechanism through the synchronous connecting rod The drive angle adjuster rotates, and the angle adjuster drives the backrest frame to rotate relative to the seat cushion frame, and also includes a seat cushion spring, the first rod and the backrest frame hinge point are hinged to the first shaft rod, the third rod and the fourth rod hinge point are hinged to the third shaft rod, both ends of the seat cushion spring are respectively connected to the first shaft rod and the third shaft rod, the seat cushion spring is a serpentine steel wire, and there is more than one, the first rod, the second rod, the third rod and the fourth rod each have two, symmetrically arranged, the first rod and the second rod hinge point are hinged to the fourth shaft rod, the second rod is sleeved with the second shaft rod, the second shaft rod is hinged to the seat cushion frame, the other end of the fourth rod is fixedly connected to the fifth shaft rod, the fifth shaft rod is connected to the leg support mechanism, and the bottom surface of the seat cushion frame is provided with a horizontal slide rail and a longitudinal slide rail.

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