Cushion rear lifting assembly and vehicle seat

Abstract

The utility model discloses a cushion rear part lifting assembly and vehicle seat. Cushion rear part lifting assembly includes frame, and the frame is configured to rectangle, and set up the cushion suspension on the frame for supporting the person who sits, and the frame includes rear connecting pipe and two side connecting plates, and the rear connecting pipe is fixed at the rear end of two side connecting plates, and two side connecting plates are equipped with pivot part on the position of front end or close to front end, and it is pivotally installed in the middle part of cushion side frame of vehicle seat. Vehicle seat, it includes backrest, cushion and above-mentioned cushion rear part lifting assembly, and the cushion includes seat basin and side frame, and the cushion rear part lifting assembly is pivotally installed in the middle part of side frame at pivot part. The utility model discloses a cushion rear part lifting assembly can improve the lying comfort of vehicle seat, and rigidity and strength are big, and simple structure, small weight.

Description

Technical Field

[0001] This utility model relates to the field of vehicles, specifically to vehicle seats, which have an adjustable function for raising the rear of the seat cushion. This utility model also relates to a seat cushion rear-lifting assembly for realizing this function. Background Technology

[0002] To meet users' increasingly higher demands for vehicle seat comfort, vehicle seats integrate multiple adjustment functions, such as backrest adjustment, seat cushion height adjustment, and seat cushion tilt adjustment. Many vehicle seats also feature reclining backrests, allowing users to lie down and rest. However, in most vehicle seats currently on the market, when the backrest is reclined, there is a vertical step-like height difference between the lower edge of the backrest and the rear edge of the seat cushion. This fails to adequately support the user's lumbar region, thus affecting the overall comfort of the vehicle seat, particularly causing discomfort in the lower back.

[0003] To avoid the aforementioned problems, some seat manufacturers have adjusted the structure of their seats, such as by incorporating a rear lifting device into the seat cushion to raise the rear of the cushion, thereby eliminating the height difference between the backrest and the seat cushion in the vertical direction. Utility Model Content

[0004] The present invention aims to solve the above-mentioned problems existing in existing vehicle seats, namely, to solve the problem of low comfort when lying flat in existing vehicle seats, while avoiding the shortcomings of existing seat cushion rear lifting adjustment devices.

[0005] Therefore, one objective of this invention is to provide a rear seat cushion lifting assembly and a vehicle seat including the rear seat cushion lifting assembly, to improve the comfort of the vehicle seat when the backrest is folded down. Another objective is to provide a rear seat cushion lifting assembly to improve its stiffness in frontal crash tests. A further objective is to provide a rear seat cushion lifting assembly with a simple structure and low weight. Yet another objective is to provide a vehicle seat whose backrest and seat cushion can move synchronously, further improving comfort.

[0006] In a first aspect, the present invention provides a rear seat cushion lifting assembly for a vehicle seat, comprising a frame and a seat cushion suspension disposed on the frame for supporting a seated person. The frame includes a rear connecting tube and two side connecting plates. The rear connecting tube is fixed at the rear end of the two side connecting plates, and each of the two side connecting plates is provided with a pivot portion at or near the front end, which is pivotally mounted in the middle of the side frame of the seat cushion of the vehicle seat.

[0007] According to an embodiment, the frame is constructed in a rectangular shape. Preferably, the side connecting plates are stamped parts.

[0008] According to an embodiment, the seat cushion suspension consists of a support net suspended on the rear connecting tube and a support pad fixed to the support net.

[0009] According to an embodiment, the frame also includes a front connecting tube, which is fixed at the front end of the two side connecting plates, and the support mesh is fixedly connected to the front connecting tube at the front end by hooks.

[0010] According to an embodiment, the support net is fixedly connected to the seat pan of the vehicle seat at the front end by a hook.

[0011] According to an embodiment, the seat rear lifting assembly also includes a drive mechanism disposed on one of the side connecting plates, near the rear connecting tube, and configured to drive the frame to pivot about the pivot between an initial position and an extreme position.

[0012] According to an embodiment, the drive mechanism includes a drive motor and a lead screw that engages with the output end of the drive motor. The lead screw extends vertically, with one end hinged to the rear of the seat cushion side frame and the other end being a free end. The drive motor is fixed to the rear connecting tube, for example via a connecting bracket, so that rotation of the output end of the drive motor causes the drive motor to move relative to the lead screw.

[0013] According to the embodiment, two drive mechanisms are provided, which are respectively disposed on two side connecting plates. Preferably, the two drive mechanisms move synchronously.

[0014] According to the embodiment, in the initial position, the front and rear ends of the seat cushion rear lifting component are at the same horizontal height, and in the extreme position, the rear end of the seat cushion rear lifting component is at a higher horizontal height than the front end.

[0015] According to the embodiment, the horizontal height difference between the front and rear ends of the seat cushion lifting assembly at its extreme position is in the range of 30-70 mm. This can be set depending on the length of the lead screw.

[0016] In a second aspect, the present invention provides a vehicle seat, which includes a backrest, a seat cushion, and a rear lifting assembly for the seat cushion. The seat cushion includes a seat basin and a side frame, and the rear lifting assembly for the seat cushion is pivotally mounted on the middle of the side frame at a pivot point.

[0017] According to an embodiment, the vehicle seat also includes a control mechanism configured to control the synchronous movement of the backrest and the seat cushion, for example by controlling the backrest drive motor and the seat cushion drive motor.

[0018] According to an embodiment, the pivot portion of the side connecting plate is configured in the form of a hole, and a corresponding pivot is provided on the side frame of the seat cushion, through which the side connecting plate is mounted to the pivot.

[0019] The rear seat lifting assembly of this utility model has the following advantages: the seat cushion suspension can be fixed on an independent tilting assembly instead of being fixed to the seat cushion, avoiding deformation during the rear seat lifting process and reducing noise generation; the frame is composed of a rear connecting tube and two side connecting plates, instead of using a curved tube as a support frame, which improves the rigidity and strength of the rear seat lifting assembly; using the above-mentioned frame structure and drive motor, the rear seat lifting assembly has a simple structure and low weight; by controlling the synchronous movement of the backrest and seat cushion, the comfort of the vehicle seat when the backrest is folded down is further improved. Attached Figure Description

[0020] The features and advantages of this utility model will become apparent from the following detailed description of embodiments with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, those skilled in the art can obtain all other embodiments without inventive effort, and these embodiments all fall within the protection scope of this utility model. In the accompanying drawings:

[0021] Figure 1 This is a schematic perspective view of a vehicle seat according to an embodiment of the present invention, showing the vertical gap between the backrest and the seat cushion when the backrest is folded down.

[0022] Figure 2 This is a schematic perspective view of a vehicle seat according to an embodiment of the present invention, showing the backrest in the normal position;

[0023] Figure 3A yes Figure 2 An enlarged view of the middle circle A shows the rear seat lifting assembly with its frame in its initial position;

[0024] Figure 3B yes Figure 2 An enlarged side view of the middle circle portion A shows how the rear seat lift assembly is mounted on the vehicle seat, and the limit position of the frame of the rear seat lift assembly.

[0025] Figure 4A yes Figure 2 An enlarged view of the central circle portion A shows the seat rear lifting assembly according to another embodiment, with its frame in the initial position;

[0026] Figure 4B yes Figure 2 An enlarged side view of the circled portion A shows... Figure 4A How is the rear seat lift assembly installed on the vehicle seat, and what are the extreme positions of the frame of the rear seat lift assembly?

[0027] In the accompanying drawings, embodiments of the present invention are shown in a simplified manner for clarity and are not necessarily shown to scale. Detailed Implementation

[0028] The rear seat lifting assembly and vehicle seat of this utility model embodiment are described below with reference to the accompanying drawings. For ease of description, directional terms such as "front" and "rear" are used, referring to the direction of the vehicle seat.

[0029] Figure 1 and Figure 2 The vehicle seat 100 is shown, including a backrest 110, a seat cushion 120, a leg support assembly 130, a base 140, and a seat cushion rear lifting assembly 150. Figure 1 In the middle, the backrest 110 is tilted back to the reclined position. Figure 2 In the center, the backrest 110 is in its normal position. The seat cushion 120 includes a seat basin 120a and a side frame 120b. The base 140 is configured as a sliding rail structure for mounting to the vehicle floor. The rear seat lifting assembly 150 is pivotally mounted on the center of the side frame 120b.

[0030] like Figure 1 As shown, when the backrest 110 is in the reclined position, there is a step-shaped vertical height difference G between the plane P1 where the lower end of the backrest 110 is located and the plane P2 where the rear end of the seat cushion is located.

[0031] Figure 3A and Figure 3B The detailed structure of the rear seat cushion lifting assembly 150 is shown. As shown, it includes a frame 151; a seat cushion suspension 152 mounted on the frame 151 for supporting the occupant; and a drive mechanism 153 configured to drive the frame 151 to pivot about a pivot mounting point with the side frame 120b between an initial position and an extreme position. The frame 151 has a rectangular construction and consists of a front connecting tube 151a, a rear connecting tube 151b, and two side connecting plates 151c. The front and rear connecting tubes 151a and 151b are fixed at the front and rear ends of the two side connecting plates 151c, respectively. Both side connecting plates have pivot portions in the form of holes 154 near the front end. A corresponding pivot 121 is provided on the seat cushion side frame 120b, through which the side connecting plates 151c are mounted to the pivot 121 via the holes 154, so that the frame 151 is pivotally mounted on the middle of the seat cushion side frame 120b of the vehicle seat 100. The side connecting plate 151c is a stamped part.

[0032] The seat cushion suspension 152 consists of a support net 152a suspended from the front and rear connecting tubes 151a and 151b, and a support pad 152b fixed to the support net 152a. For example... Figure 3AAs shown, the support net 152a consists of four wires arranged symmetrically about the central axis of the frame 151. Each wire has hooks at both ends, and the support net 152a is suspended from the front and rear connecting pipes 151a and 151b via the hooks. The support pad 152b includes three support strips arranged parallel to each other.

[0033] The drive mechanism 153 is disposed on one of the side connecting plates 151c, near the rear connecting tube 151b, and includes a drive motor 153a and a lead screw 153b meshing with the output end of the drive motor. The lead screw 153b extends generally vertically, and one end is hinged to the rear of the seat cushion side frame 120b at a pivot point 155 (see...). Figure 3B The other end is a free end. The drive motor 153a is fixed to the rear connecting tube 151b through the connecting bracket 153c. The rotation of the output end of the drive motor 153a causes the drive motor 153a to move relative to the lead screw 153b, thereby driving the rear connecting tube 151b to rise, thus realizing the upward lifting of the rear part of the seat cushion 120.

[0034] The drive mechanism 153 also includes a sleeve 153d riveted to the side connecting plate 151c for the lead screw 153b to pass through, and one end of the connecting bracket 153c is riveted to the sleeve 153d and the other end is fixed to the rear connecting pipe 151b.

[0035] At the initial position (see Figure 3A The front and rear connecting pipes 151a and 151b are at the same horizontal level, in the extreme position (see Figure 3B The rear connecting pipe 151b is at a higher horizontal level than the front connecting pipe 151a. The difference in horizontal height between the front and rear connecting pipes 151a and 151b at their extreme positions is adjustable, for example, within the range of 30-70 mm, depending on the length of the lead screw 153b.

[0036] In this example, the drive mechanism 153 is only provided on one of the side connecting plates 151c. However, it is also conceivable to provide two drive mechanisms, which are respectively provided on the two side connecting plates 151c, and the two drive mechanisms move synchronously.

[0037] The vehicle seat 100 also includes a control mechanism (not shown) configured to control the synchronous movement of the backrest 110 and the seat cushion 120, such as a backrest tilting motion and a seat cushion rear lifting motion, for example by controlling the backrest drive motor and the drive motor 153a of the seat cushion rear lifting assembly 100.

[0038] In use, as the backrest drive motor operates, the backrest 110 tilts backward to the reclined position. Simultaneously, the drive motor 153a of the seat cushion rear lifting assembly 150 moves relative to the lead screw 153b, causing the frame 151 to pivot around the pivot 121, thus allowing the rear connecting tube 151b to... Figure 2and Figure 3A The initial position shown is raised to Figure 3B The extreme position shown has the rear connecting tube 151b raised to a horizontal height that is close to or substantially flush with the lower end of the backrest 110, thereby eliminating the original vertical height difference and improving the comfort of the vehicle seat when the backrest is folded down.

[0039] Figure 4A and Figure 4B A seat cushion rear lifting assembly 250 according to another embodiment of the present invention is shown. For example... Figure 4A and Figure 4B As shown, it includes a rectangular frame 251; a seat cushion suspension 252 mounted on the frame 251 for supporting the occupant; and a drive mechanism 253 configured to drive the frame 251 to pivot about a pivot mounting point with respect to the side frame 220b between an initial position and an extreme position. The frame 251 consists of a rear connecting tube 251b and two side connecting plates 251c. The rear connecting tube 251b is fixed at the rear ends of the two side connecting plates 251c, and each side connecting plate has a pivot portion in the form of a hole 254 at its front end. A corresponding pivot 221 is provided on the seat cushion side frame 220b, through which the side connecting plates 251c are mounted to the pivot 221 via the holes 254, so that the frame 251 is pivotally mounted on the middle of the seat cushion side frame 220b of the vehicle seat 200. The side connecting plates 251c are also stamped parts. The pivot 221 and the seat suspension 251 are coaxially or parallel to each other at the fastening point at the rear end of the seat basin, with the offset between the two shafts within 10mm. In this example, no front connecting tube is provided.

[0040] The seat suspension 252 consists of a support net 252a suspended from the rear connecting tube 151b and the seat basin 220a of the seat 220, and a support pad 252b fixed to the support net 252a. For example... Figure 4A As shown, the support net 252a consists of four wires arranged symmetrically about the central axis of the frame 251. Each wire has hooks at both ends. The support net 252a is suspended from the rear connecting pipe 151b and fixedly connected to the seat basin 220a via these hooks at the front and rear ends, respectively. The support pad 252b includes three support strips arranged parallel to each other. In this example, the support net 252a is appropriately bent near the rear connecting pipe 251b, forming an approximate V-shape (see...). Figure 4B One and two support strips are fixed to the two branches of the V-shape respectively to better support the lower back when sitting.

[0041] The drive mechanism 253 is disposed on one of the side connecting plates 251c, near the rear connecting tube 251b, and includes a drive motor 253a and a lead screw 253b meshing with the output end of the drive motor. The lead screw 253b extends generally vertically, and one end is hinged at a pivot point 255 to the rear of the seat cushion side frame 220b (see [link]). Figure 4B The other end is a free end. The drive motor 253a is fixed to the rear connecting tube 251b through the connecting bracket 253c. The rotation of the output end of the drive motor 253a causes the drive motor 253a to move relative to the lead screw 253b, thereby driving the rear connecting tube 251b to rise, thus realizing the upward lifting of the rear part of the seat cushion 220.

[0042] The drive mechanism 253 also includes a sleeve 253d riveted to the side connecting plate 251c for the lead screw 253b to pass through, and one end of the connecting bracket 253c is riveted to the sleeve 253d and the other end is fixed to the rear connecting pipe 251b.

[0043] At the initial position (see Figure 4A The front and rear ends (rear connecting tube 251b and hole 254) of the seat rear lifting assembly 250 are at the same horizontal height, at the extreme position (see Figure 4B The connecting pipe 251b is at a horizontal height higher than the hole 254. Similarly, the horizontal height difference at the extreme positions is adjustable.

[0044] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A seat cushion rear lifting assembly for a vehicle seat, comprising a frame configured in a rectangular shape; and a seat cushion suspension disposed on the frame for supporting a seated occupant, characterized in that, The frame includes a rear connecting tube and two side connecting plates. The rear connecting tube is fixed at the rear end of the two side connecting plates, and both side connecting plates have pivot parts at or near the front end, which are pivotally mounted on the middle of the seat cushion side frame of the vehicle seat.

2. The seat cushion rear lifting assembly according to claim 1, characterized in that, The seat suspension consists of a support net suspended from the rear connecting tube and a support pad fixed to the support net.

3. The seat cushion rear lifting assembly according to claim 2, characterized in that, The frame also includes a front connecting tube, which is fixed at the front end of the two side connecting plates, and the support mesh is fixedly connected to the front connecting tube at the front end by hooks.

4. The seat cushion rear lifting assembly according to claim 2, characterized in that, The support net is fixedly connected to the seat pan of the vehicle seat at the front end by a hook, and the pivot part is coaxially connected to the buckle point connecting the seat cushion at the rear end of the seat pan.

5. The seat cushion rear lifting assembly according to claim 4, wherein the pivot part is arranged parallel to the fastening point connecting shaft of the seat cushion suspended at the rear end of the seat basin, and the offset between the two shafts is within 10mm.

6. The seat cushion rear lifting assembly according to claim 1 or 2, characterized in that, The rear seat lift assembly also includes a drive mechanism located on one of the side connecting plates, near the rear connecting tube, and configured to drive the frame to pivot about the pivot between an initial position and an extreme position.

7. The seat cushion rear lifting assembly according to claim 6, characterized in that, The drive mechanism includes a drive motor and a lead screw that engages with the output end of the drive motor. The lead screw extends vertically, with one end hinged to the rear of the seat cushion side frame and the other end being a free end. The drive motor is fixed to the rear connecting pipe, so that the rotation of the output end of the drive motor causes the drive motor to move relative to the lead screw.

8. The seat cushion rear lifting assembly according to claim 6, characterized in that, Two drive mechanisms are provided, which are respectively located on the two side connecting plates, and the two drive mechanisms move synchronously.

9. The seat cushion rear lifting assembly according to claim 6, characterized in that, In the initial position, its front and rear ends are almost at the same horizontal level, while in the extreme position, the rear end is at a higher horizontal level than the front end.

10. The seat cushion rear lifting assembly according to claim 9, characterized in that, The horizontal height difference between its front and rear ends at the extreme positions is in the range of 30-70 mm.

11. A vehicle seat comprising a backrest and a seat cushion, characterized in that, The vehicle seat further includes a rear seat cushion lifting assembly according to any one of claims 1-10, the seat cushion including a seat basin and a side frame, the rear seat cushion lifting assembly being pivotally mounted at the center of the side frame at a pivot point, and also includes a control mechanism configured to control the synchronous movement of the backrest and the seat cushion.

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