Cushion adjustment mechanism for vehicle seat

Abstract

The present disclosure provides a cushion adjustment mechanism for a vehicle seat, comprising a seat frame and a slide rail assembly. The seat frame is arranged above the slide rail assembly by means of a connecting rod assembly. A first drive assembly is provided between the connecting rod assembly and the slide rail assembly; and the first drive assembly drives the connecting rod assembly to realize zero-gravity adjustment for a seat. A second drive assembly is provided between the seat frame and the connecting rod assembly; and the second drive assembly drives the connecting rod assembly to realize height adjustment for the seat. By means of the provisions of the connecting rod assembly, the first drive assembly and the second drive assembly, zero-gravity adjustment and height adjustment of the cushion can be realized. The adjustment is realized by pushing the cushion, so that excellent overall strength is realized, and the seat is not prone to damage when subjected to an impact in an initial state. The first drive assembly is arranged at the lower end, thereby using a lower space of the seat, and thus reducing the height of the seat. An external zero-gravity adjustment structure is conducive to the stability of a seat structure and the design of a seat pan structure, thereby also optimizing the width dimension of the seat.

Description

A seat cushion adjustment mechanism for car seats

[0001] Cross-reference to related applications

[0002] This disclosure claims priority to Chinese Patent Application No. 202421660857.1, filed on July 12, 2024, entitled “A Seat Cushion Adjustment Mechanism for a Vehicle Seat”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure pertains to the field of automotive seat technology, specifically relating to a seat cushion adjustment mechanism for automotive seats. Background Technology

[0004] With the continuous development of the automotive industry and the increasing level of intelligence, consumers' demands for the comfort of car seats are also constantly rising, leading to the emergence of zero-gravity seats. The goal of "zero-gravity" posture seat adjustment is to meet the support needs of the three main parts of the occupant's body: feet, thighs, and torso. This ensures that these three parts receive sufficient and appropriate support, distributes pressure on the back and legs, and allows the muscles of the whole body to relax, achieving the ultimate state of comfort for the occupant.

[0005] However, in the existing technology, when the seat is impacted, the zero-gravity adjustment motor is easily damaged, the seat stability is insufficient, and the overall structural strength is not high.

[0006] Public content

[0007] This disclosure proposes a seat cushion adjustment mechanism for automobile seats, which achieves zero-gravity adjustment and height adjustment of the seat, and has high overall strength and good stability, and is not easily damaged when the seat is subjected to impact.

[0008] Therefore, the technical solution adopted in this embodiment is as follows: a seat cushion adjustment mechanism for a car seat, including a seat frame and a slide rail assembly. The seat frame is disposed above the slide rail assembly via a linkage assembly. A first drive assembly is disposed between the linkage assembly and the slide rail assembly. The first drive assembly drives the linkage assembly to achieve zero-gravity adjustment of the seat. A second drive assembly is disposed between the seat frame and the linkage assembly. The second drive assembly drives the linkage assembly to achieve height adjustment of the seat.

[0009] Optionally, the linkage assembly includes a first linkage assembly, a second linkage assembly, a third linkage assembly, a front linkage fixing member, and a rear linkage fixing member. The front linkage fixing member and the rear linkage fixing member are spaced apart on the slide rail assembly. One end of the first linkage assembly is hinged to the front end of the seat frame frame, and the other end is hinged to the second linkage assembly. The other end of the second linkage assembly is hinged to the front linkage fixing member. One end of the third linkage assembly is hinged to the rear end of the seat frame frame, and the other end is hinged to the rear linkage fixing member.

[0010] One end of the first drive assembly is hinged to the rear fixing member of the connecting rod, and the other end of the first drive assembly is hinged to the second connecting rod assembly; one end of the second drive assembly is hinged to the third connecting rod assembly, and the other end of the second drive assembly is hinged to the front end of the seat frame.

[0011] Optionally, the seat frame, first link assembly, second link assembly, third link assembly, and first drive assembly constitute a zero-gravity adjustment structure. The first link assembly is located on the left and right outer sides of the seat frame, making the zero-gravity adjustment structure an external zero-gravity adjustment structure. This not only allows the first drive assembly to be positioned closer to the front link fixing member, reducing the cantilever between the first drive assembly and the center of each slide rail, thereby improving the stress on the first drive assembly and increasing the stability of the structure, but also frees up space so that the front end of the seat frame can retract inward, facilitating the design of the seat basin front end, thereby reducing the lateral dimension of the seat cushion and facilitating the overall arrangement of the seat.

[0012] Optionally, the first linkage assembly includes two first linkages spaced apart from each other on the left and right; the second linkage assembly includes a left second linkage and a right second linkage spaced apart from each other on the left and right, and the left second linkage and the right second linkage are provided with front linkage tubes extending from the left and right, and the first drive assembly is hinged to the left second linkage; the third linkage assembly includes a rear linkage tube extending from the left and right and hinged to the rear end of the seat frame, and a left third linkage and a right third linkage are spaced apart from each other on the rear linkage tube, and the second drive assembly is hinged to the right third linkage.

[0013] Optionally, the front linkage tube is located at the hinge point between the first and second linkage assemblies, or at the hinge point between the second linkage assembly and the front fixing member of the linkage. When the front linkage tube is located at the hinge point between the first and second linkage assemblies, the space between it and the anti-submarine tube is increased, facilitating the arrangement of the leg support mechanism. In this case, threads can be directly provided on the front linkage tube, thereby reducing the number of threaded fasteners connecting the first and second linkage assemblies, which is beneficial for the lightweight design of the seat. When the front linkage tube is located at the hinge point between the second linkage assembly and the front fixing member of the linkage, the linkage tube is only subjected to torque and not bending moment, increasing the structural strength and stability of the seat.

[0014] Optionally, two of each of the front and rear fixing members of the connecting rod are provided on the left and right sides;

[0015] The connecting rod front fixing member is L-shaped and the left and right sides are arranged opposite each other. The front end of the connecting rod rear fixing member on the left side is provided with a hinge portion for the first drive assembly to hinge.

[0016] Optionally, both the first drive assembly and the second drive assembly employ a motor lead screw assembly or a linear guide assembly. When the first drive assembly employs a motor lead screw assembly, and zero gravity and height adjustment are not implemented, the front and rear mounting points of the first drive assembly are in their shortest state. In the event of a vehicle collision, the motor experiences stable force, and the overall force on the seat is better. During zero gravity adjustment, the first drive assembly can drive the linkage assembly to achieve zero gravity adjustment.

[0017] Optionally, a synchronization control device is provided between the first drive component and the second drive component. The synchronization control device is used to coordinate the gravity adjustment and altitude adjustment actions.

[0018] Optionally, the hinge point between the first drive assembly and the second linkage assembly is located below the hinge point between the second linkage assembly and the front fixing member of the linkage, so that the first drive assembly is arranged closer to the lower end, which can effectively utilize the lower end space and facilitate reducing the height of the seat cushion.

[0019] Optionally, when zero-gravity adjustment and height adjustment are not performed, the angle formed between the first link assembly and the second link assembly is set to protrude forward, which is beneficial to the link being able to bear the force when the seat is subjected to a forward impact, thereby enhancing the impact stability of the seat.

[0020] Optionally, the seat frame skeleton includes seat frame side plates spaced apart on the left and right and anti-submarine tubes disposed at the front ends of the two seat frame side plates.

[0021] The beneficial effects of this disclosure are as follows: By setting up the linkage assembly, the first drive assembly, and the second drive assembly, the seat cushion of this application can achieve zero-gravity adjustment and height adjustment; in this application, adjustment is achieved by pushing the seat cushion, resulting in good overall strength and resistance to damage when subjected to impact in the initial state; the first drive assembly is arranged at the lower end, utilizing the space under the seat and reducing the height of the seat; the external zero-gravity adjustment structure is beneficial to the stability of the seat structure and the design of the seat basin structure, and can also optimize the width of the seat. Attached Figure Description

[0022] Figure 1 is an exploded view of the seat adjustment device provided in the embodiment of this disclosure.

[0023] Figure 2 is a schematic diagram of the seat adjustment device provided in the embodiment of this disclosure from a first-view perspective.

[0024] Figure 3 is a schematic diagram of the seat adjustment device provided in the embodiment of this disclosure from a second perspective.

[0025] Figure 4 is a schematic diagram of the seat adjustment device provided in the embodiment of this disclosure from a third-person perspective.

[0026] Figure 5 is a schematic diagram from a first-view perspective of the seat adjustment device provided in the embodiment of this disclosure when it is deployed in zero gravity.

[0027] Figure 6 is a schematic diagram of the seat adjustment device provided in this embodiment when it is deployed under zero gravity.

[0028] Figure 7 is a schematic diagram from a second perspective of the seat adjustment device provided in the embodiment of this disclosure when it is deployed in zero gravity.

[0029] Figure 8 is a schematic diagram from a third-person perspective of the seat adjustment device provided in the embodiment of this disclosure when it is deployed in zero gravity.

[0030] Figure 9 is a schematic diagram from a first-view perspective of the seat adjustment device provided in the embodiment of this disclosure when it is in a high-profile unfolded state.

[0031] Figure 10 is a second schematic diagram of the seat adjustment device provided in the embodiment of this disclosure when it is in a high-profile unfolded state.

[0032] Figure 11 is a schematic diagram from a second perspective of the seat adjustment device provided in the embodiment of this disclosure when it is in a high-profile unfolded state.

[0033] Figure 12 is a schematic diagram from a third-person perspective of the seat adjustment device provided in the embodiment of this disclosure when it is in a high-profile unfolded state.

[0034] Figure 13 is a schematic diagram of the second seat adjustment device provided in the embodiment of this disclosure (the front linkage tube is set at the hinge point between the second linkage assembly and the front fixing member of the linkage).

[0035] Figure 14 is a schematic diagram of the seat adjustment device provided in the embodiment of this disclosure installed on the seat frame.

[0036] Reference numerals: Seat frame skeleton - 100, Seat frame side plate - 110, Anti-submersion tube - 120, Slide rail assembly - 200, Link assembly - 300, First link assembly - 310, First link - 311, Second link assembly - 320, Front linkage tube - 321, Left second link - 322, Right second link - 323, Third link assembly - 330, Rear linkage tube - 331, Left third link - 332, Right third link - 333, Front fixing part of link - 340, Rear fixing part of link - 350, First drive assembly - 400, Second drive assembly - 500. Detailed Implementation

[0037] The present disclosure will be further described below with reference to the embodiments and accompanying drawings:

[0038] As shown in Figures 1-14, a seat cushion adjustment mechanism for a car seat mainly consists of a seat frame frame 100, a slide rail assembly 200, a connecting rod assembly 300, a first drive assembly 400, and a second drive assembly 500. The slide rail assembly 200 has a prior art structure. To facilitate the installation of the connecting rod assembly, the seat frame frame 100 includes seat frame side plates 110 spaced apart on the left and right sides, and anti-submersion tubes 120 located at the front ends of the two seat frame side plates 110.

[0039] The seat frame 100 is mounted above the slide rail assembly 200 via a linkage assembly 300. A first drive assembly 400 is positioned between the linkage assembly 300 and the slide rail assembly 200, driving the linkage assembly 300 to achieve zero-gravity adjustment of the seat. A second drive assembly 500 is positioned between the seat frame 100 and the linkage assembly 300, driving the linkage assembly 300 to achieve height adjustment of the seat.

[0040] The linkage assembly 300 includes a first linkage assembly 310, a second linkage assembly 320, a third linkage assembly 330, a front linkage fixing member 340, and a rear linkage fixing member 350, with the front and rear linkage fixing members 340 and 350 spaced apart on the slide rail assembly 200. One end of the first linkage assembly 310 is hinged to the front end of the seat frame 100, and the other end is hinged to the second linkage assembly 320. The other end of the second linkage assembly 320 is hinged to the front linkage fixing member 340. One end of the third linkage assembly 330 is hinged to the rear end of the seat frame 100, and the other end is hinged to the rear linkage fixing member 350.

[0041] One end of the first drive assembly 400 is hinged to the rear fixing member 350 of the connecting rod, and the other end of the first drive assembly 400 is hinged to the second connecting rod assembly 320. One end of the second drive assembly 500 is hinged to the third connecting rod assembly 330, and the other end of the second drive assembly 500 is hinged to the seat frame 100.

[0042] When the first drive assembly 400 is working, it can drive the second linkage assembly 320 to rotate around the hinge point between the second linkage assembly 320 and the front fixing member 340 of the linkage. Since the second drive assembly 500 is locked and the third linkage assembly 330 is hinged to the rear fixing member 350 of the linkage, the front end of the entire seat cushion is lifted upward and the rear end is lowered through the first linkage assembly 310, the second linkage assembly 320, the seat frame frame 100 and the third linkage assembly 330, thereby realizing zero-gravity adjustment of the seat.

[0043] When the second drive assembly 320 is working, it drives the third link assembly 330 to rotate around the hinge point between the third link assembly 330 and the rear fixing member 350 of the link. Since the first drive assembly 310 is locked, the height of the entire seat can be adjusted by rotating the third link assembly 330, the seat frame 100 and the first link assembly 310.

[0044] The seat frame 100, the first link assembly 310, the second link assembly 320, the third link assembly 330, and the first drive assembly 400 constitute a zero-gravity adjustment structure. The first link assembly 310 is located on the left and right outer sides of the seat frame, making the zero-gravity adjustment structure an external zero-gravity adjustment structure. This external zero-gravity adjustment structure not only allows the first drive assembly 400 to be positioned closer to the front link fixing member 340, reducing the cantilever between the first drive assembly 400 and the center of each side slide rail, thus improving the stress on the first drive assembly 400 and increasing structural stability, but also frees up space, allowing the front end of the seat frame to retract inwards, facilitating the design of the seat basin front, reducing the lateral dimensions of the seat cushion, and simplifying the overall seat arrangement.

[0045] The first linkage assembly 310 includes two identical first linkages 311 spaced apart on the left and right. The second linkage assembly 320 includes a left second linkage 322 and a right second linkage 323 spaced apart on the left and right, and the left second linkage 322 and the right second linkage 323 are provided with a front linkage tube 321 extending on the left and right, and the first drive assembly 400 is hinged to the left second linkage 323. The third linkage assembly 330 includes a rear linkage tube 331 extending on the left and right and hinged to the rear end of the seat frame 100, and a left third linkage 332 and a right third linkage 333 spaced apart on the rear linkage tube 331, and the second drive assembly 500 is hinged to the right third linkage 333. There are two connecting rod front fixing members 340 and two connecting rod rear fixing members 350 on the left and right, respectively. The connecting rod front fixing member 340 is L-shaped and the left and right sides are arranged opposite each other. The front end of the left connecting rod rear fixing member 350 is provided with a hinge portion for the first drive assembly 400 to hinge.

[0046] The front linkage tube 321 can be located at the hinge point between the first link assembly 310 and the second link assembly 320, or at the hinge point between the second link assembly 320 and the front fixing member 340 of the link. When the front linkage tube is located at the hinge point between the first link assembly 310 and the second link assembly 320, the space between it and the anti-submarine tube can be increased, which facilitates the arrangement of the leg support mechanism. At this time, threads can be directly provided on the front linkage tube, thereby reducing the number of threaded fasteners connecting the first link assembly 310 and the second link assembly 320, which is beneficial to the lightweight design of the seat. When the front linkage tube is located at the hinge point between the second link assembly 320 and the front fixing member 340 of the link, the linkage tube is only subjected to torque and not bending moment, which increases the structural strength and stability of the seat.

[0047] Both the first drive assembly 400 and the second drive assembly 500 employ a motor lead screw assembly or a linear guide rail assembly. Alternatively, other existing linear drive elements can be selected as needed. When the first drive assembly uses a motor lead screw assembly, and zero-gravity and height adjustment are not implemented, the front and rear mounting points of the first drive assembly 400 are in their shortest state. At this point, the lead screw is not exposed, ensuring stable force distribution on the motor and better overall force distribution on the seat during a vehicle collision. During zero-gravity adjustment, the first drive assembly can drive the linkage assembly 300 to achieve zero-gravity adjustment.

[0048] This disclosure includes a synchronization control device between the first drive assembly 400 and the second drive assembly 500, thereby coordinating the gravity adjustment and height adjustment actions. Alternatively, the first drive assembly and the second drive assembly can move sequentially, depending on the actual situation.

[0049] The hinge point between the first drive assembly 400 and the second link assembly 320 is located below the hinge point between the second link assembly 320 and the front fixing member 340 of the link, so that the first drive assembly 400 is arranged closer to the lower end, which can effectively utilize the lower space and facilitate reducing the height of the seat cushion.

[0050] When zero-gravity adjustment and height adjustment are not performed, the angle formed between the first link assembly 310 and the second link assembly 320 is set to protrude forward, which is beneficial for the link to bear the force when the seat is impacted forward, thereby enhancing the impact stability of the seat. Industrial applicability

[0051] In summary, this disclosure provides a seat cushion adjustment mechanism for a vehicle seat that achieves zero-gravity adjustment and height adjustment while exhibiting high overall strength and stability, and is not easily damaged when the seat is subjected to impact.

Claims

1. A seat cushion adjustment mechanism for a vehicle seat, comprising a seat frame (100) and a slide rail assembly (200), characterized in that: The seat frame (100) is mounted above the slide rail assembly (200) via a linkage assembly (300). A first drive assembly (400) is provided between the linkage assembly (300) and the slide rail assembly (200). The first drive assembly (400) drives the linkage assembly (300) to achieve zero-gravity adjustment of the seat. A second drive assembly (500) is provided between the seat frame (100) and the linkage assembly (300). The second drive assembly (500) drives the linkage assembly (300) to achieve height adjustment of the seat.

2. The seat cushion adjustment mechanism for a vehicle seat according to claim 1, characterized in that: The linkage assembly (300) includes a first linkage assembly (310), a second linkage assembly (320), a third linkage assembly (330), a front linkage fixing member (340), and a rear linkage fixing member (350). The front linkage fixing member (340) and the rear linkage fixing member (350) are spaced apart on the slide rail assembly (200). One end of the first linkage assembly (310) is hinged to the front end of the seat frame (100), and the other end is hinged to the second linkage assembly (320). The other end of the second linkage assembly (320) is hinged to the front linkage assembly (310). On the fixing member (340), one end of the third link assembly (330) is hinged to the rear end of the seat frame (100), and the other end is hinged to the rear fixing member (350); one end of the first drive assembly (400) is hinged to the rear fixing member (350), and the other end of the first drive assembly (400) is hinged to the second link assembly (320); one end of the second drive assembly (500) is hinged to the third link assembly (330), and the other end of the second drive assembly (500) is hinged to the front end of the seat frame (100).

3. The seat cushion adjustment mechanism for a vehicle seat according to claim 2, characterized in that: The seat frame (100), the first link assembly (310), the second link assembly (320), the third link assembly (330), and the first drive assembly (400) constitute a zero-gravity adjustment structure. The first link assembly (310) is located on the left and right outer sides of the seat frame, making the zero-gravity adjustment structure an external zero-gravity adjustment structure.

4. The seat cushion adjustment mechanism for a vehicle seat according to claim 2 or 3, characterized in that: The first linkage assembly (310) includes two first linkages (311) spaced apart from each other on the left and right. The second linkage assembly (320) includes a left second linkage (322) and a right second linkage (323) spaced apart from each other on the left and right. The left second linkage (322) and the right second linkage (323) are provided with front linkage tubes (321) extending from the left and right. The first drive assembly (400) is hinged to the left second linkage (322). The third linkage assembly (330) includes a rear linkage tube (331) extending from the left and right and hinged to the rear end of the seat frame (100). The rear linkage tube (331) is provided with a left third linkage (332) and a right third linkage (333) spaced apart from each other on the left and right. The second drive assembly (500) is hinged to the right third linkage (333).

5. The seat cushion adjustment mechanism for a vehicle seat according to claim 4, characterized in that: The front linkage tube (321) is located at the hinge point between the first linkage assembly (310) and the second linkage assembly (320), or at the hinge point between the second linkage assembly (320) and the front fixing member (340).

6. The seat cushion adjustment mechanism for a vehicle seat according to any one of claims 2-5, characterized in that: Two of each of the front fixing member (340) and the rear fixing member (350) of the connecting rod are provided on the left and right sides; The connecting rod front fixing member (340) is L-shaped and the left and right sides are arranged opposite each other. The front end of the connecting rod rear fixing member (350) on the left side is provided with a hinge part for the first drive assembly (400) to hinge.

7. The seat cushion adjustment mechanism for a vehicle seat according to any one of claims 1-6, characterized in that: Both the first drive assembly (400) and the second drive assembly (500) adopt a motor lead screw assembly or a linear guide rail assembly; When the first drive assembly (400) uses a motor screw assembly and no zero gravity and height adjustment are performed, the front and rear mounting points of the first drive assembly (400) are in the shortest state. During zero gravity adjustment, the first drive assembly can push the linkage assembly (300) to achieve zero gravity adjustment.

8. The seat cushion adjustment mechanism for a vehicle seat according to claim 7, characterized in that: A synchronization control device is provided between the first drive component (400) and the second drive component (500).

9. The seat cushion adjustment mechanism for a vehicle seat according to any one of claims 2-8, characterized in that: The hinge point between the first drive assembly (400) and the second link assembly (320) is located below the hinge point between the second link assembly (320) and the link front fixing member (340).

10. The seat cushion adjustment mechanism for a vehicle seat according to any one of claims 2-9, characterized in that: When zero gravity adjustment and height adjustment are not performed, the included angle formed between the first link assembly (310) and the second link assembly (320) is set forward.

11. The seat cushion adjustment mechanism for a vehicle seat according to any one of claims 1-10, characterized in that: The seat frame skeleton (100) includes seat frame side plates (110) spaced apart on the left and right, and anti-submarine tubes (120) disposed at the front ends of the two seat frame side plates (110).

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