Seat backrest linkage structure

Abstract

The utility model discloses a seat backrest linkage structure which comprises an outer linkage piece and an inner linkage piece, and the outer linkage piece is composed of a first outer connecting rod, a second outer connecting rod and a third outer connecting rod which are connected in sequence; the inner linkage piece is composed of a first inner connecting rod, a second inner connecting rod and a third inner connecting rod which are sequentially connected, the third outer connecting rod is hinged to the first inner connecting rod through a common hinge point, and the front end of the seat basin is hinged to the front end of the seat basin framework. The internal and external linkage piece is additionally arranged between the seat backrest framework and the seat basin framework to be connected with the seat basin, the backrest drives the internal and external linkage piece in the backward falling process so that the seat basin can be lifted upwards, the experience feeling of passengers is improved, the backrest and the seat basin can be completely attached to the human body curve, meanwhile, the seat can be actively adjusted front and back, and a linkage adjusting mechanism is matched, so that the safety of passengers is improved. And the method is suitable for various conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile seats, in particular to a seat back linkage structure. Background Art

[0002] With the increasing popularity of vehicles, traveling by car has become the first choice for people. Car seats are an important part that affects comfort and aesthetics, affecting passengers' first impression of the car. The riding experience of the front and rear seats often reflects the quality of the car. Car seats require reliability, smoothness, convenience and comfort in adjustment. At present, cars are not just a means of transportation. People often enjoy the fun of driving a car. Therefore, car seats must also adapt to the development of the times and keep up with the pace of improving car quality. At this stage, the adjustment of car seats has not yet been popularized. When the occupants are different, the body position and comfort level vary from person to person, and the occupants' requirements for the rear seats are getting higher and higher. When the occupants flip the seat back, most of the seat pans remain motionless, and there is a certain angle deviation between the seat cushion and the backrest, which greatly affects the comfort of the passengers. Utility Model Content

[0003] In view of the defects of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a seat back linkage structure with a simple structure, which drives the seat basin to lift upward when the backrest is tilted backward, thereby improving the passenger experience.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a seat back linkage structure, including an outer linkage member and an inner linkage member, the outer linkage member is composed of a first outer link, a second outer link and a third outer link connected in sequence, the upper end of the first outer link is fixedly mounted on the outer side wall of the backrest frame, and the front end of the third outer link is hinged to the outer side wall of the seat basin frame; the inner linkage member is composed of a first inner link, a second inner link and a third inner link connected in sequence, the upper end of the first inner link is hinged to the inner side wall of the seat basin frame, and the front end of the third outer link is fixedly connected to the rear end of the seat basin; the third outer link is hinged to the first inner link through a common hinge point, and the front end of the seat basin is hinged to the front end of the seat basin frame.

[0005] Preferably, the third inner connecting rods on the left and right sides are integrally arranged, and the whole is in a "U" shape and is stamped from steel plates. The two side parts of the "U" serve as the third inner connecting rods on the left and right sides respectively, and the middle part of the "U" is used for welding with the rear end of the seat basin to increase the welding area.

[0006] Preferably, the third outer connecting rod and the first inner connecting rod are both stamped plates to increase structural strength.

[0007] Preferably, the backrest frame is tilted backward by 35 to 45 degrees, driving the seat basin to be lifted upward by 6 to 10 degrees.

[0008] The beneficial effects of the present invention are as follows: by adding an inner and outer linkage part between the seat back frame and the seat basin frame to connect with the seat basin, the inner and outer linkage parts are driven when the backrest falls backwards, so that the seat basin is lifted upward, thereby improving the occupant experience, and being able to fully realize that the backrest and the seat basin fit the human body curve. At the same time, the seat itself can be actively adjusted forward and backward, and with the linkage adjustment mechanism, it can be applied to a variety of situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the utility model;

[0010] Figure 2 This is a schematic diagram of the rear structure of the utility model

[0011] Figure 3 for Figure 2 A magnified view of part I;

[0012] Figure 4 is the initial state diagram of the seat;

[0013] Figure 5 This is a schematic diagram of the seat being folded back;

[0014] In the figure: A-backrest frame, B-seat basin frame, C-seat basin, D-common hinge point, 1-external linkage member, 1a-first outer connecting rod, 1b-second outer connecting rod, 1c-third outer connecting rod, 2-inner linkage member, 2a-first inner connecting rod, 2b-second inner connecting rod, 2c-third inner connecting rod. DETAILED DESCRIPTION

[0015] In order to better understand the improvements made by the present invention relative to the prior art, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0016] like Figures 1-2 As shown, a seat back linkage structure is mainly composed of an outer linkage member 1 and an inner linkage member 2. The outer linkage member 1 is composed of a first outer link 1a, a second outer link 1b and a third outer link 1c which are connected in sequence. The upper end of the first outer link 1a is fixedly mounted on the outer side wall of the backrest frame A, and the front end of the third outer link 1c is hinged to the outer side wall of the seat pan frame B.

[0017] like Figure 3 As shown, the inner linkage 2 is composed of a first inner link 2a, a second inner link 2b and a third inner link 2c which are connected in sequence. The upper end of the first inner link 2a is hinged to the inner wall of the seat basin frame B, the front end of the third outer link 1c is fixedly connected to the rear end of the seat basin C, and the front end of the seat basin C is hinged to the front end of the seat basin frame B.

[0018] Among them, the third outer link 1c and the first inner link 2a pass through a common hinge point D. The third outer link 1c and the first inner link 2a are both stamped plates to increase the structural strength. At the same time, the third outer link 1c and the first inner link 2a are punched with steps between the two hinge points, so that the front end of the third outer link 1c is closer to the common hinge point D relative to the rear end, and the upper end of the first inner link 2a is closer to the common hinge point D relative to the lower end.

[0019] In order to ensure a stable connection between the inner link 2 and the seat basin C, the third inner connecting rods 2c on the left and right sides are integrally arranged, and the whole is in a "U" shape and is punched from steel plates. The two side parts of the "U" serve as the third inner connecting rods 2c on the left and right sides respectively, and the middle part of the "U" is used for welding with the rear end of the seat basin C to increase the welding area.

[0020] like Figures 4-5 As shown, the backrest frame A tilts backward by 35 to 45 degrees and drives the seat basin C to be lifted upward by 6 to 10 degrees.

[0021] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A seat back linkage structure, characterized in that: The invention comprises an outer linkage member (1) and an inner linkage member (2), wherein the outer linkage member (1) is composed of a first outer link (1a), a second outer link (1b) and a third outer link (1c) which are connected in sequence, the upper end of the first outer link (1a) is fixedly mounted on the outer side wall of a backrest frame (A), and the front end of the third outer link (1c) is hinged to the outer side wall of a seat basin frame (B); the inner linkage member (2) is composed of a first inner link (2a), a second inner link (2b) and a third inner link (2c) which are connected in sequence, the upper end of the first inner link (2a) is hinged to the inner side wall of a seat basin frame (B), and the front end of the third outer link (1c) is fixedly connected to the rear end of a seat basin (C); the third outer link (1c) is hinged to the first inner link (2a) via a common hinge point (D), and the front end of the seat basin (C) is hinged to the front end of the seat basin frame (B).

2. A seat back linkage structure according to claim 1, characterized in that: The third inner connecting rods (2c) on the left and right sides are integrally arranged, and are formed by stamping a steel plate in a "U" shape as a whole. The two side parts of the "U" serve as the third inner connecting rods (2c) on the left and right sides respectively, and the middle part of the "U" is used for welding with the rear end of the seat basin (C) to increase the welding area.

3. The seat back linkage structure according to claim 1, characterized in that: The third outer connecting rod (1c) and the first inner connecting rod (2a) are both stamped plates.

4. The seat back linkage structure according to claim 1, characterized in that: The backrest frame (A) is tilted backward by 35 to 45 degrees, driving the seat basin (C) to be lifted upward by 6 to 10 degrees.

Images