Partial lifting mechanism for vehicle seat frame

Abstract

The present invention discloses a partial lifting mechanism for a vehicle seat frame. A support body is provided at the rear end of the seat frame. A swing arm is connected to the end of the support body. The swing arm, at one end away from the support body, is rotatably mounted on the seat frame. A drive mechanism is mounted on the seat frame for driving the swing arm to rotate relative to the seat frame. Rotation of the swing arm can drive the support body to move along the height direction of the seat frame. The present invention has the beneficial effect of lifting the support body upward along the height direction of the seat frame, compensating for the height difference between the rear end of the seat frame and the backrest, and providing effective support for the rear side of the occupant's buttocks, allowing the occupant to lie completely flat, providing greater comfort for the occupant in the reclining position.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seats, in particular to a partial lifting mechanism for a vehicle seat frame. Background Art

[0002] Seat comfort plays a crucial role in the user's driving experience. Nowadays, both automobile manufacturers and consumers have put forward more stringent requirements for the comfort of car seats.

[0003] Most car seats on the market, especially those in mid- to high-end models, have reclining backrests. This feature allows users to rest in a reclining position. However, in existing seat structures, when the backrest is reclined, there's a significant gap between the rear end of the seat and the backrest support plane. This results in a lack of support for the back of the user's buttocks, or even a noticeable dangling position, making the reclining position less comfortable. Summary of the Invention

[0004] In view of this, the present invention provides a partial lifting mechanism for a vehicle seat frame, which can compensate for the height difference between the rear end of the seat and the backrest when the backrest is flattened, effectively improving the user's comfort experience when lying flat.

[0005] To achieve the above purpose, the technical solution of the present invention is as follows:

[0006] A partial lifting mechanism for a vehicle seat frame includes a seat frame. The key feature is that a support body is provided at the rear end of the seat frame, a swing arm is connected to the end of the support body, and the swing arm is rotatably mounted on the seat frame at one end away from the support body. A driving mechanism is installed on the seat frame for driving the swing arm to rotate relative to the seat frame. The rotation of the swing arm can drive the support body to move along the height direction of the seat frame.

[0007] With the above structure, after the seat back is folded back, the driving mechanism drives the support body to lift upward along the height direction of the seat frame, which can make up for the height difference between the rear end of the seat frame and the backrest, so that the seat back can be folded down to a truly flat posture, significantly improving the user's comfort experience when lying flat.

[0008] Preferably, the swing arm comprises a drive section and a support section, wherein one end of the drive section is hingedly connected to the middle portion of the seat frame side panel, and the support section is offset inwardly relative to the drive section along the width of the seat frame. One end of the support section is fixedly connected to the end of the support body. This design enables a rotational assembly that lifts the support body upward and facilitates the drive mechanism to control the rotation of the swing arm.

[0009] Preferably, the drive mechanism includes a reduction motor and a gear connected to the output shaft of the reduction motor, and the end of the drive section away from the hinged connection with the seat frame is provided with an arc-shaped tooth portion, which meshes with the gear. With the above structure, the reduction motor can drive the support body to lift upward.

[0010] Preferably, a limit pin is fixedly mounted on the side plate, and an arc-shaped hole is provided on the driving section, which is slidably mounted on the limit pin. The arc-shaped hole slides in the limit pin to play a limiting role, that is, to define the upper and lower limit positions of the support body's movement.

[0011] As a preferred embodiment, the reduction motor is mounted on the outside of the side plate, and the gear is rotatably mounted on the inside of the side plate via a bracket.

[0012] Preferably, the bracket has three lugs fixedly connected to the side panels, one of which is fixed to the end of the stop pin. A mounting shaft is sleeved around the center of the gear, one end of which is supported on the bracket. This structure optimizes the layout of the components, ensuring a compact product structure and reliable assembly.

[0013] Preferably, a thickened tooth plate is connected to the inner side of the arc-shaped tooth portion, and the tooth shape of the thickened tooth plate is consistent with the tooth shape of the arc-shaped tooth portion. The above structure helps to improve the meshing strength of the gear.

[0014] Preferably, an offset transition section is provided between the driving section and the supporting section, the driving section, the supporting section and the offset transition section are integrally formed, and one end of the supporting section connected to the supporting body exceeds the driving section along the length direction of the seat frame.

[0015] Preferably, the support body is constructed as a strip structure arranged horizontally along the width direction of the seat frame, and the rear end of the seat frame seat spring is connected to the support body.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. After the seat back is folded back, the support body rises upward along the height direction of the seat frame, which can make up for the height difference between the rear end of the seat frame and the backrest, and provide effective support for the back of the occupant's buttocks, allowing the occupant to lie completely flat, significantly improving the user's comfort experience when lying flat.

[0018] 2. The components and their assembly layout are reasonably designed, with technical advantages of high production and assembly reliability and good market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of the seat frame;

[0020] Figure 2 A partial schematic diagram showing the rear end lifting structure of the seat frame;

[0021] Figure 3 Schematic diagram of the structure of the swing arm;

[0022] Figure 4 Schematic diagram of a seat with a rear end lifting mechanism for the seat. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0024] like Figure 1 、 2 As shown in Figure 3, a partial lifting mechanism for a vehicle seat frame comprises a seat portion, namely a seat frame 1, of the vehicle seat. Side panels 1a are fixedly mounted on both sides of the seat frame 1. A support body 2 is provided at the rear end of the seat frame 1. The support body 2 is a strip-shaped structure extending horizontally along the width of the seat frame 1. A swing arm 3 is connected to each end of the support body 2. The swing arm 3 comprises a driving section 3a and a supporting section 3b. The driving section 3a extends away from the supporting section 3b, and a mounting hole a is defined at the end of the driving section 3a facing away from the supporting section 3b. The mounting hole a is hinged to the middle of the side panel 1a of the seat frame 1 via a pin b. The end of the supporting section 3b facing away from the driving section 3a is fixedly connected to the end of the support body 2. A driving mechanism 4 is mounted on the seat frame 1 for driving one of the swing arms 3 to rotate relative to the side panel 1a.

[0025] like Figure 4 As shown, after the seat back A is folded back, the driving mechanism 4 drives the swing arm 3 to rotate, and the rotation of the swing arm 3 will drive the support body 2 to lift upward along the height direction of the seat frame 1, thereby achieving the purpose of compensating for the height difference between the rear end of the seat frame 1 and the backrest A, so that the seat back A can be folded down to a truly flat posture. In this way, after the occupant lies flat on the seat, the back of his or her buttocks can be fully supported by the support body 2, which significantly improves the user's comfort experience when lying flat.

[0026] For example Figure 2 As shown, in this embodiment, the drive mechanism 4 is composed of a power-connected reduction motor 4a and a gear 4b. The gear 4b is rotatably mounted on the side plate 1a of the seat frame 1 via a mounting shaft 4c. The drive section 3a is provided with an arcuate tooth portion 3c at the end away from the hinged connection with the side plate 1a. The arcuate tooth portion 3c meshes with the gear 4b. The reduction motor 4a drives the gear 4b to rotate, and the gear 4b drives the drive section 3a to move via the arcuate tooth portion 3c, thereby controlling the upward or downward movement of the support body 2 along the height direction of the seat frame 1. Furthermore, to enhance the meshing strength of the gears, a thickened tooth plate 3e is mounted on the inner side of the arcuate tooth portion 3c. The tooth profile of the thickened tooth plate 3e is consistent with that of the arcuate tooth portion 3c.

[0027] For example Figure 3As shown, the support section 3b is offset inward relative to the driving section 3a along the width direction of the seat frame 1, and an offset transition section 3f is provided between the two. The driving section 3a, the support section 3b and the offset transition section 3f are integrally formed. The end of the support section 3b connected to the support body 2 exceeds the driving section 3a along the length direction of the seat frame 1, that is, the arc-shaped tooth portion 3c is located between the ends of the driving section 3a and the support section 3b, so that the reduction motor 4a can better drive the swing arm 1 to rotate.

[0028] For example Figure 1 As shown, the rear end of the seat spring 1b of the seat frame 1 is connected to the support body 2. With this design, after the support body 2 at the rear end of the seat frame 1 is lifted upward, a smooth transition can be ensured between the support body 2 and the seat frame 1, avoiding the discomfort caused by the obvious upward protrusion of the support body 2.

[0029] like Figure 1 、 2 As shown, a limit pin 5 is fixedly mounted on the side plate 1a, and an arcuate hole 3d is provided in the drive section 3a. This arcuate hole 3d is slidably mounted on the limit pin 5. When the swing arm 1 rotates up and down, the arcuate hole 3d slides within the limit pin 5, acting as a limiter, i.e., defining the upper and lower extremes of the movement of the support body 2. Furthermore, for ease of installation, the reduction motor 4a is mounted on the outside of the side plate 1a, and the gear 4b is rotatably mounted on the inside of the side plate 1a via a bracket 6. The bracket 6 has three lugs 6a fixedly connected to the side plate 1a. This design helps ensure the compactness of the product structure and the reliability of assembly. Furthermore, one of the lugs 6a is fixed to the end of the limit pin 5, and the mounting shaft 4c, which is sleeved on the axis of the gear 4b and supported on the bracket 6, also maintains a constant distance between the mounting shaft 4c and the limit pin 5, thereby ensuring the precision and stability of the meshing between the gear 4b and the arcuate tooth portion 3c, and helping to improve transmission smoothness.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention. Such changes fall within the scope of protection of the present invention.

Claims

1. A partial lifting mechanism for a vehicle seat frame, comprising a seat frame (1), wherein side panels (1a) are fixedly mounted on both sides of the seat frame (1), and characterized in that: The rear end of the seat frame (1) is provided with a support body (2), the end of the support body (2) is connected to a swing arm (3), and the end of the swing arm (3) away from the support body (2) is rotatably mounted on the seat frame (1), and a driving mechanism (4) is mounted on the seat frame (1) for driving the swing arm (3) to rotate relative to the seat frame (1), and the rotation of the swing arm (3) can drive the support body (2) to move along the height direction of the seat frame (1); The swing arm (3) comprises a driving section (3a) and a supporting section (3b), wherein the driving section (3a) extends in a direction away from the supporting section (3b), and one end of the driving section (3a) away from the supporting section (3b) is hinged to the middle of the side plate (1a), the supporting section (3b) is offset inwardly relative to the driving section (3a) along the width direction of the seat frame (1), and one end of the supporting section (3b) away from the driving section (3a) is fixedly connected to the end of the support body (2); The support body (2) is placed horizontally along the width direction of the seat frame (1), and both ends of the support body (2) are connected to the swing arms (3). The driving mechanism (4) is used to drive one of the swing arms (3) to rotate relative to the side plate (1a).

2. The vehicle seat frame partial lifting mechanism according to claim 1, characterized in that: The driving mechanism (4) comprises a reduction motor (4a) and a gear (4b) connected to the output shaft of the reduction motor (4a); an arc-shaped tooth portion (3c) is provided at one end of the driving section (3a) away from the hinged connection with the seat frame (1); and the arc-shaped tooth portion (3c) is meshed with the gear (4b).

3. The vehicle seat frame partial lifting mechanism according to claim 2, characterized in that: A limit pin (5) is fixedly mounted on the side plate (1a), and an arc-shaped hole (3d) is provided on the driving section (3a). The arc-shaped hole (3d) is slidably sleeved on the limit pin (5).

4. The vehicle seat frame partial lifting mechanism according to claim 3, characterized in that: The reduction motor (4a) is mounted on the outside of the side plate (1a), and the gear (4b) is rotatably mounted on the inside of the side plate (1a) via a bracket (6).

5. The vehicle seat frame partial lifting mechanism according to claim 4, characterized in that: The bracket (6) has three lugs (6a) fixedly connected to the side plate (1a), one of the lugs (6a) being fixed to the end of the limit pin (5), and a mounting shaft (4c) being sleeved on the middle of the gear (4b), one end of the mounting shaft (4c) being supported on the bracket (6).

6. The vehicle seat frame partial lifting mechanism according to claim 2, characterized in that: The inner side of the arc-shaped tooth portion (3c) is connected to a thickened tooth plate (3e), and the tooth shape of the thickened tooth plate (3e) is consistent with the tooth shape of the arc-shaped tooth portion (3c).

7. The vehicle seat frame partial lifting mechanism according to claim 1, characterized in that: An offset transition section (3f) is provided between the driving section (3a) and the supporting section (3b); the driving section (3a), the supporting section (3b) and the offset transition section (3f) are integrally formed; and one end of the supporting section (3b) connected to the supporting body (2) exceeds the driving section (3a) along the length direction of the seat frame (1).

8. The vehicle seat frame partial lifting mechanism according to claim 1, characterized in that: The support body (2) is constructed as a strip structure arranged transversely along the width direction of the seat frame (1), and the rear end of the seat spring (1b) of the seat frame (1) is connected to the support body (2).

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