A kind of four-bar linkage linkage sinking mechanism for electrically adjusting the cushion of car seat backrest

Abstract

The utility model relates to a four-bar linkage linkage sinking mechanism for electrically adjusting the cushion of the backrest of the car seat, which comprises a cushion lower frame skeleton assembly, first and second lower frame bone connecting parts provided on opposite sides, a backrest skeleton assembly, first and second backrest connecting parts provided on the same side of the backrest skeleton assembly, a first backrest connecting part in rotational connection with a first lower frame bone connecting part, a cushion upper frame skeleton assembly, first and second upper frame bone connecting parts provided on opposite sides of the cushion upper frame skeleton assembly, a first upper frame bone connecting part in rotational connection with a second backrest connecting part, a front connecting support assembly, first and second front support connecting parts provided on opposite sides of the front connecting support assembly, a first front support connecting part in rotational connection with a second upper frame bone connecting part, and a second front support connecting part in rotational connection with a second lower frame bone connecting part. The utility model ensures stable adjustment and structural reliability.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat system technology, and in particular to a four-bar linkage sinking mechanism for electrically adjustable seat cushions of automotive seat backs. Background Technology

[0002] With the continuous development of the automotive industry, consumers are increasingly demanding higher efficiency and comfort in their vehicles' interior space. Especially in the passenger car sector, users not only require seats to have basic seating functions, but also expect greater flexibility in terms of space layout, storage capacity, and overall passenger experience. In recent years, the demand for car seats that can be folded down to create a "double bed" configuration has been growing. This configuration significantly enhances the vehicle's resting function and, by connecting the trunk and seating areas, improves the overall utilization of the vehicle's storage space.

[0003] Therefore, designing a mechanism that enables backrest adjustment and synchronizes with the seat cushion to sink down, thereby ensuring smooth adjustment and structural reliability while effectively improving storage space utilization and ride comfort, has become an urgent technical problem to be solved. Summary of the Invention

[0004] Therefore, this utility model provides a four-link linkage sinking mechanism for the electric adjustment of car seat backrest cushions, which ensures smooth adjustment and structural reliability while effectively improving storage space utilization and riding comfort.

[0005] To solve the above-mentioned technical problems, this utility model provides a four-link linkage sinking mechanism for electrically adjustable seat cushions of automobile seats, comprising: The lower frame of the seat cushion is provided with a first lower frame bone connecting part and a second lower frame bone connecting part on opposite sides. A backrest frame assembly, wherein a first backrest connecting part and a second backrest connecting part are provided on the same side of the backrest frame assembly; the first backrest connecting part is rotatably connected to the first lower frame bone connecting part. The seat cushion upper frame assembly has a first upper frame bone connecting part and a second upper frame bone connecting part on opposite sides; the first upper frame bone connecting part is rotatably connected to the second backrest connecting part. A front connecting bracket assembly, wherein a first front bracket connecting portion and a second front bracket connecting portion are provided on opposite sides of the front connecting bracket assembly; the first front bracket connecting portion is rotatably connected to the second upper frame bone connecting portion, and the second front bracket connecting portion is rotatably connected to the second lower frame bone connecting portion.

[0006] In one embodiment of this utility model, an angle adjuster is provided between the first backrest connecting part and the first lower frame bone connecting part.

[0007] In one embodiment of this utility model, a first pivot is connected between the first upper frame bone connecting part and the second backrest connecting part.

[0008] In one embodiment of this utility model, the two first rotating shafts are respectively located at both ends of the backrest frame assembly.

[0009] In one embodiment of this utility model, support arms are provided at both ends of the upper frame assembly of the seat cushion, and a curved portion is provided at one end of the support arm near the backrest frame assembly, and the first upper frame bone connecting portion is provided at the curved portion.

[0010] In one embodiment of the present invention, the front connecting bracket assembly includes two connecting arms located on both sides of the front part of the upper frame frame assembly of the seat cushion, and each connecting arm is provided with a first front bracket connecting part and a second front bracket connecting part at both ends.

[0011] In one embodiment of this utility model, a second pivot is provided between the first front support connecting part and the second upper frame bone connecting part, and between the second front support connecting part and the second lower frame bone connecting part.

[0012] In one embodiment of this utility model, the lower frame assembly of the seat cushion is provided with a connecting plate for threaded connection with the vehicle body.

[0013] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art: The present invention describes a four-bar linkage mechanism for electrically adjustable backrests and seat cushions in automobiles. This mechanism uses a four-bar linkage structure to achieve both electric backrest adjustment and seat cushion lowering, ensuring the stability and consistency of the backrest reclining and seat cushion lowering actions, and improving structural reliability. Attached Figure Description

[0014] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of the four-link linkage sinking mechanism for the electric adjustment cushion of the car seat backrest.

[0016] Figure 2 This is a structural diagram of the seat of this utility model before it is folded down.

[0017] Figure 3 This is a schematic diagram of the structure of the seat after it is folded down.

[0018] Figure 4This is a structural schematic diagram of the upper frame skeleton assembly of the seat cushion of this utility model.

[0019] Figure 5 This is a structural schematic diagram of the lower frame skeleton assembly of the seat cushion of this utility model.

[0020] Figure 6 This is a structural schematic diagram of the backrest frame assembly of this utility model.

[0021] Explanation of reference numerals in the instruction manual: 1. Seat cushion lower frame assembly; 11. First lower frame bone connecting part; 12. Second lower frame bone connecting part; 13. Connecting plate; 2. Backrest frame assembly; 21. First backrest connecting part; 22. Second backrest connecting part; 23. First pivot; 3. Seat cushion upper frame assembly; 31. First upper frame bone connecting part; 32. Second upper frame bone connecting part; 33. Support arm; 331. Bend part; 4. Front connecting bracket assembly; 41. First front bracket connecting part; 42. Second front bracket connecting part; 43. Connecting arm; 44. Second pivot; 5. Angle adjuster. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0023] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0024] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0025] In this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model based on the specific content of the technical solution.

[0026] Reference Figures 1 to 6 As shown, this utility model discloses a four-link linkage sinking mechanism for an electrically adjustable car seat backrest cushion, comprising: The lower frame of the seat cushion assembly 1 has a first lower frame bone connecting part 11 and a second lower frame bone connecting part 12 on opposite sides. Backrest frame assembly 2, on the same side of the backrest frame assembly 2, is provided a first backrest connecting part 21 and a second backrest connecting part 22; the first backrest connecting part 21 is rotatably connected to the first lower frame bone connecting part 11. The upper frame of the seat cushion assembly 3 has a first upper frame bone connecting part 31 and a second upper frame bone connecting part 32 on opposite sides; the first upper frame bone connecting part 31 is rotatably connected to the second backrest connecting part 22. The front connecting bracket assembly 4 has a first front bracket connecting part 41 and a second front bracket connecting part 42 on opposite sides; the first front bracket connecting part 41 is rotatably connected to the second upper frame bone connecting part 32, and the second front bracket connecting part 42 is rotatably connected to the second lower frame bone connecting part 12.

[0027] In one embodiment, an angle adjuster 5 is provided between the first backrest connecting part 21 and the first lower frame connecting part 11. The (electric) angle adjuster 5 is a mechanical transmission device installed at the connection between the seat back and the seat cushion, which is used to adjust the backrest angle and works in conjunction with the drive motor. By using the angle adjuster 5 for adjustment, the forward tilting and reclining process of the seat is controlled and smooth, and a reliable linkage effect can be achieved.

[0028] It should be noted that the electric tilt-forward mechanism adopts a 5-type angle adjuster structure, which makes the frame adjustment more stable. The welding process used for each frame component is simple and highly consistent, which is conducive to mass production and quality control, and reduces manufacturing costs.

[0029] In one embodiment, a first pivot 23 is connected between the first upper frame bone connecting part 31 and the second backrest connecting part 22.

[0030] In one embodiment, the two first pivots 23 are located at opposite ends of the backrest frame assembly 2.

[0031] In one embodiment, support arms 33 are provided at both ends of the upper frame assembly 3 of the seat cushion, and a curved portion 331 is provided at one end of the support arm 33 near the backrest frame assembly 2, and the first upper frame bone connecting portion 31 is provided at the curved portion 331.

[0032] In one embodiment, the front connecting bracket assembly 4 includes two connecting arms 43 located on both sides of the front of the upper frame assembly 3 of the seat cushion, and each connecting arm 43 is provided with a first front bracket connecting part 41 and a second front bracket connecting part 42 at both ends.

[0033] In one embodiment, a second pivot 44 is provided between the first front support connecting portion 41 and the second upper frame bone connecting portion 32, and between the second front support connecting portion 42 and the second lower frame bone connecting portion 12.

[0034] In one embodiment, the lower seat frame assembly 1 is provided with a connecting plate 13 for threaded connection with the vehicle body.

[0035] In operation, this invention forms a stable four-bar linkage by establishing a four-point rotary connection between the backrest frame assembly 2, the upper seat frame assembly 3, the lower seat frame assembly 1, and the front connecting bracket assembly 4. When the electric drive device actuates the angle adjuster 5, the first backrest connecting part 21 rotates relative to the first lower frame connecting part 11, thereby driving the backrest frame assembly 2 to adjust its angle. During this process, the first upper frame connecting part 31 rotates with the second backrest connecting part 22 via a pivot, causing the upper seat frame assembly 3 to move synchronously.

[0036] Meanwhile, the movement of the upper frame frame assembly 3 is further transmitted to the front connecting bracket assembly 4 through the rotational relationship between the first front support connecting part 41 and the second upper frame bone connecting part 32, and the rotational relationship between the second front support connecting part 42 and the second lower frame bone connecting part 12, so that the four frame assemblies form a coupling of force and displacement, and the upper frame frame assembly 3 of the seat cushion sinks in linkage with the backrest frame assembly 2 as it flips.

[0037] When the backrest is electrically adjusted and reclined, the four-link structure ensures that the front of the seat cushion flips down and sinks, thus creating a continuous plane between the rear seats and the trunk, meeting the needs of "double bed mode" and expanding storage space.

[0038] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A four-link linkage sinking mechanism for electrically adjustable seat cushions of automobile seats, characterized in that, include: The lower frame of the seat cushion assembly (1) has a first lower frame bone connecting part (11) and a second lower frame bone connecting part (12) on opposite sides. Backrest frame assembly (2), on the same side of the backrest frame assembly (2) are provided a first backrest connecting part (21) and a second backrest connecting part (22); the first backrest connecting part (21) is rotatably connected to the first lower frame bone connecting part (11); The upper frame of the seat cushion assembly (3) has a first upper frame bone connecting part (31) and a second upper frame bone connecting part (32) on opposite sides; the first upper frame bone connecting part (31) is rotatably connected to the second backrest connecting part (22). The front connecting bracket assembly (4) has a first front bracket connecting part (41) and a second front bracket connecting part (42) on opposite sides; the first front bracket connecting part (41) is rotatably connected to the second upper frame bone connecting part (32), and the second front bracket connecting part (42) is rotatably connected to the second lower frame bone connecting part (12).

2. The four-link linkage sinking mechanism for electrically adjustable seat cushions of automobile seats according to claim 1, characterized in that, An angle adjuster (5) is provided between the first backrest connecting part (21) and the first lower frame bone connecting part (11) for rotation.

3. The four-link linkage sinking mechanism for electrically adjustable seat cushions of automobile seats according to claim 1, characterized in that, A first pivot (23) is connected between the first upper frame bone connecting part (31) and the second backrest connecting part (22).

4. The four-link linkage sinking mechanism for electrically adjustable seat cushions of automobile seats according to claim 3, characterized in that, The two first pivots (23) are located at the two ends of the backrest frame assembly (2).

5. The four-link linkage sinking mechanism for electrically adjustable seat cushions of automobile seats according to claim 1, characterized in that, The upper frame frame assembly (3) of the seat cushion is provided with support arms (33) at both ends. The support arm (33) is provided with a bent part (331) at one end near the backrest frame assembly (2). The first upper frame bone connecting part (31) is provided at the bent part (331).

6. The four-link linkage sinking mechanism for electrically adjustable seat cushions of automobile seats according to claim 1, characterized in that, The front connecting bracket assembly (4) includes two connecting arms (43) located on both sides of the front of the upper frame frame assembly (3) of the seat cushion, and the two ends of each connecting arm (43) are respectively provided with the first front bracket connecting part (41) and the second front bracket connecting part (42).

7. The four-link linkage sinking mechanism for electrically adjustable seat cushions of automobile seats according to claim 1, characterized in that, A second pivot (44) is provided between the first front support connecting part (41) and the second upper frame bone connecting part (32) and between the second front support connecting part (42) and the second lower frame bone connecting part (12).

8. The four-link linkage sinking mechanism for electrically adjustable seat cushions of automobile seats according to claim 1, characterized in that, The lower frame assembly of the seat cushion (1) is provided with a connecting plate (13) for threaded connection with the vehicle body.

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