Vehicle seat with cushion rear lifting function

Abstract

The invention relates to a vehicle seat with a cushion rear lifting function, which is characterized in that the vehicle seat is provided with a cushion, the cushion is provided with a bearing assembly used for supporting passengers and a seat frame assembly used for supporting the bearing assembly, the bearing assembly comprises a front seat basin, a rear seat basin, a rear seat basin and a rear seat frame, and the front seat basin is fixedly connected to the seat frame assembly; the rear bearing assembly can pivotally move between an initial position and a lifting position relative to the seat frame assembly; the swing arm assembly is provided with a left swing arm and a right swing arm which are oppositely arranged, the left swing arm and the right swing arm are directly or indirectly hinged to the seat frame assembly, and the rear bearing assembly is in driving connection with at least one of the left swing arm and the right swing arm; and the driving assembly can drive the at least one swing arm to swing, and through the swing motion of the at least one swing arm, the rear bearing assembly can be driven to pivotally move between the initial position and the lifting position of the rear bearing assembly.

Description

Technical Field

[0001] The present invention relates to a vehicle seat with a function of lifting the rear part of the seat cushion. Background Art

[0002] Vehicle occupants have increasingly higher requirements for the comfort of vehicle seats in different usage states.

[0003] When an occupant needs to take a short nap, the seat backrest is usually adjusted backward to different degrees. When the backrest is adjusted to the fully reclined position, it can form a bed or a combined bed with the seat cushion, but there will be a problem of pressing against the waist at the transition due to the lack of a flat connection between the backrest and the seat cushion. For this, reference can be made to Figure 11 the vehicle seat 100 in the prior art shown. The vehicle seat 100 has a backrest 103 and a seat cushion 102. In the case of the fully reclined backrest 103, it can be seen that there is a height difference H between the seat cushion surface 149 and the backrest surface 150, and this height difference H will cause a problem of pressing against the waist of the occupant.

[0004] The rear lifting function of some seat cushions is realized by linkage with the backrest. However, since the backrest performs an eccentric motion, the seat cushion will shake when the backrest is adjusted, which affects the comfort. Summary of the Invention

[0005] The purpose of the present invention is to provide a vehicle seat with a function of lifting the rear part of the seat cushion, which can at least solve one of the above-mentioned problems.

[0006] To achieve the above purpose, the present invention provides a vehicle seat with a function of lifting the rear part of the seat cushion, characterized in that the vehicle seat has a seat cushion, and the seat cushion has a load-bearing assembly for supporting an occupant and a seat frame assembly for supporting the load-bearing assembly. The load-bearing assembly includes:

[0007] a front seat basin, which is fixedly connected to the seat frame assembly;

[0008] a rear load-bearing component, which can pivotally move relative to the seat frame assembly between its initial position and the lifted position;

[0009] a swing arm assembly, which has a left swing arm and a right swing arm arranged oppositely. The left swing arm and the right swing arm are respectively directly or indirectly hinged to the seat frame assembly, and the rear load-bearing component is drivingly connected to at least one of the left swing arm and the right swing arm; and

[0010] a driving component, which can drive the at least one swing arm to swing. Through the swinging motion of the at least one swing arm, the rear load-bearing component can be driven to pivotally move between its initial position and the lifted position.

[0011] The realization of the function of the rear lifting of the vehicle seat cushion of the present invention can be achieved by driving the swing arm assembly to swing through the driving assembly, with a simple structure and low cost.

[0012] Advantageously, the rear bearing assembly includes a rear bracket mechanism, and the rear bracket mechanism is drivingly connected to the at least one swing arm. Through the swinging movement of the at least one swing arm, the rear bracket mechanism can be driven to pivot, and through the pivoting movement of the rear bracket mechanism, the rear bearing assembly can be driven to pivot between its initial position and the lifting position. The two components being "drivingly connected" can be understood as that a driving effect of one component on the other can be achieved through a connection relationship between the two components, such as a direct or indirect connection via an intermediate transmission member (such as a connecting rod).

[0013] Advantageously, the at least one swing arm has at least one chute, and the chute has or is configured as a curved driving chute section. The rear bracket mechanism can be slidably hinged in the driving chute section of the chute. Wherein, through the sliding of the rear bracket mechanism in the driving chute section of the chute, the rear bearing assembly can be driven to pivot between its initial position and the lifting position. Herein, not only can the lifting of the rear bearing assembly be driven through the driving chute section, but also the lifting distance can be predetermined by setting the orientation and length of the driving chute section.

[0014] Advantageously, the left swing arm has a chute, and the right swing arm has a chute; or,

[0015] One of the left swing arm and the right swing arm has a chute, and the other of the left swing arm and the right swing arm does not have a chute.

[0016] Advantageously, the rear bracket mechanism has two opposed rear lifting brackets, and the two rear lifting brackets are directly or indirectly hingedly connected to the seat frame assembly at their first hinge connection points.

[0017] In this article, being "directly hingedly connected" to the seat frame assembly can be understood as being directly hingedly connected to the original components of the seat frame assembly, such as the upper side plate; and being "indirectly hingedly connected" to the seat frame assembly can be understood as being hingedly connected to the original components of the seat frame assembly through an intermediate component, such as a fixing bracket, for example, first hingedly connected to the intermediate component and then fixing the intermediate component, such as welding or screwing, to the original components of the seat frame assembly.

[0018] Advantageously, at least one of the two rear lifting brackets is drivingly connected to the at least one swing arm at its second hinge connection point behind the first hinge connection point. Thus, the pivoting lifting or sinking of the seat basin rear bracket can be driven by the swinging movement of the swing arm.

[0019] Advantageously, an anti-wear bushing is fixedly arranged in at least one of the sliding grooves, and the rear bracket mechanism slides in the anti-wear bushing by means of a guide pin accordingly; or,

[0020] The rear bracket mechanism slides in at least one of the sliding grooves by means of a bolt-bushing combination, and the bolt-bushing combination includes a bolt and a bushing sleeved on the bolt. The bushing is embedded in at least one of the sliding grooves accordingly and can slide along it.

[0021] Advantageously, the swing arm assembly further has a connecting shaft that fixedly connects the left swing arm and the right swing arm to each other.

[0022] Advantageously, the driving assembly is directly or indirectly fixed to the seat frame assembly on its fixed side, and is directly or indirectly fixed to the left swing arm or the right swing arm or the connecting shaft on its driving side.

[0023] Advantageously, the vehicle seat further has a backrest that can be pivotally adjusted towards and away from the seat cushion. Here, in the case of the backrest reclining greatly, by pivotally lifting the rear bearing assembly from the rear side, the seat cushion surface and the backrest surface can be made flat, thereby solving the problem of the occupant's lumbar spine being propped up due to the non-flatness of the two when taking a nap, forming a bed, or combining beds. Description of the Drawings

[0024] The present invention will be explained in more detail below with reference to the drawings by means of embodiments, but the present invention is not limited to the embodiments described in the drawings and detailed below. The drawings are as follows:

[0025] Figure 1a A schematic perspective view shows the seat cushion of the vehicle seat of the present invention in the assembled state;

[0026] Figure 1b A schematic perspective view shows the seat cushion in FIG. 1, where the front seat pan, the rear bearing assembly, and the seat frame assembly are shown separately;

[0027] Figure 1c A schematic perspective view shows Figure 1a the seat cushion in, but the front seat pan is omitted, and the rear bearing assembly together with the fixed bracket and the swing arm assembly is shown separated from the seat frame assembly;

[0028] Figure 2a and Figure 2b respectively show the connection and positional relationship between the rear bearing assembly together with the fixed bracket and the swing arm assembly in an assembly drawing and an exploded view;

[0029] Figure 3 A left swing arm of the swing arm assembly is shown in a side view;

[0030] Figure 4 A schematic diagram shows the movement sketch of the rear bearing assembly during the lifting process;

[0031] Figure 5a and Figure 5b Schematic diagrams respectively showing the initial position and the rear-lifted position of the rear load-bearing assembly, and different states of the swing arm are also shown herein;

[0032] Figure 6a and Figure 6b Part drawings respectively showing the initial position and the rear-lifted position of the rear load-bearing assembly, and different states of the corresponding components are shown herein;

[0033] Figure 7 A first variant embodiment of the present invention is schematically shown in a perspective view;

[0034] Figure 8 A second variant embodiment of the present invention is schematically shown in an exploded view;

[0035] Figure 9 A third variant embodiment of the present invention is schematically shown in a perspective view;

[0036] Figure 10 A fully-flat state of the backrest and the seat cushion of the vehicle seat of the present invention in a large recline situation is schematically shown in a perspective view; and

[0037] Figure 11 A non-flat state of the backrest and the seat cushion of a vehicle seat in the prior art in a large recline situation is schematically shown in a perspective view. Detailed Description of the Invention

[0038] The following describes illustrative embodiments of the present invention. In this specification, for explanatory purposes only, various systems, structures, and devices are schematically depicted in the drawings, but not all features of the actual systems, structures, and devices are described. For example, well-known functions or structures are not described in detail to avoid obscuring the present invention with unnecessary details. Of course, it should be understood that in any actual application, many specific implementation decisions need to be made to achieve the specific goals of the developer or user, and industry-related and system-related limitations need to be complied with, and these specific goals may vary depending on the actual application. In addition, it should be understood that such specific implementation decisions, although complex and time-consuming, are routine tasks for those of ordinary skill in the art who benefit from the present invention.

[0039] The terms and phrases used herein should be understood and interpreted as having a meaning consistent with the understanding of such terms and phrases by those skilled in the relevant art. Consistent usage of a term or phrase herein is not intended to imply a special definition of the term or phrase, i.e., a definition that is different from the ordinary and customary meaning as understood by those skilled in the art. For terms or phrases that are intended to have a special meaning, i.e., a meaning that is different from that understood by those skilled in the art, such special definition will be explicitly listed in the specification as a definition, directly and unambiguously giving the special definition of the term or phrase.

[0040] Unless required by the context, throughout the following specification, the word "include" and variations such as "comprising" and "having" are to be interpreted in an open, inclusive sense, that is, such as "including but not limited to".

[0041] The vehicle seat 1 of the present invention comprises a seat cushion 2 and a backrest 3 which can be adjusted towards or away from the seat cushion 2 (see Figure 10 ). The backrest 3 can be connected to the seat cushion 2, or to the base on the slide rail or other possible in-vehicle components. The vehicle seat 1 can be installed in a vehicle for use. The vehicle of the present invention can be a car, such as a sedan or a commercial vehicle. The vehicle xyz coordinate system is established according to the conventional technical means in the field of automotive engineering to facilitate the subsequent description of the relative positions of the various parts in the present invention.

[0042] Next, different embodiments of the seat cushion 2 of the vehicle seat 1 of the present invention are described in conjunction with the accompanying drawings. It should be understood that for good visibility, components not directly related to the invention such as seat covers and foam are omitted in the drawings.

[0043] Figure 1a The seat cushion 2 of the present invention in an assembled state is shown in a schematic stereoscopic diagram. The seat cushion 2 generally has an upper support assembly 4 (which may also be referred to as a seat pan assembly) for supporting an occupant and a seat frame assembly 5 for supporting the lower portion of the support assembly 4. The support assembly 4 includes a planar front seat pan 6 arranged forward in the x-direction mainly for supporting the thigh root area of ​​the occupant and a rear support assembly 7 arranged rearward in the x-direction mainly for supporting the buttocks area of ​​the occupant. The front seat pan 6 and the rear support assembly 7 together define the sitting area of ​​the seat cushion.

[0044] Figure 1b Shown in a schematic perspective view Figure 1aThe seat cushion 2 in it is shown separately from the front seat pan 6, the rear load-bearing assembly 7, and the seat frame assembly 5 before. Here, the front seat pan 6 is to be fixedly connected, for example, welded or screwed, to the seat frame assembly 5, for example, its upper side plate 10. Here, the front seat pan 6 is generally configured in a plate-like form, but it is conceivable that the front seat pan 6 can also be configured in other forms, for example, in the form of a spring bed having a frame and load-bearing springs connecting the frame, as long as it has a load-bearing function (for example, bearing the root area of the occupant's thigh).

[0045] Figure 1c Shown in a schematic perspective view Figure 1a the seat cushion 2 in it, but the front seat pan 6 is omitted, and the rear load-bearing assembly 7 together with the fixing bracket 9 and the swing arm assembly 8 is shown separated from the seat frame assembly 5. As will be described in detail below, the rear load-bearing assembly 7 is pivotally connected to the seat frame assembly 5 indirectly through the fixing bracket 9 that is welded to both the upper side plate 10 and the front cross bar 11 of the seat frame assembly 5 at the same time, and the rear load-bearing assembly 7 can be actuated to pivotally lift and pivotally sink relative to the seat frame assembly 5 from the rear side to pivot between its lifted position and the initial position, so as to individually adjust the load-bearing comfort of the occupant's hip area, and to ensure that the rear load-bearing assembly 7 or the entire seat cushion 2 can be horizontally flush (or horizontally aligned) with the backrest 3 in the case of the large recline of the backrest 3 (see Figure 10 ).

[0046] Figure 2a and Figure 2b show the rear load-bearing assembly 7 together with the fixing bracket 9 and the swing arm assembly 8 in an assembly drawing and an exploded view respectively, to show their component parts and connection relationships. The rear load-bearing assembly 7 includes a rear bracket mechanism, and the swing arm assembly 8 can drive the rear load-bearing assembly 7 to pivotally lift or sink from the rear side via the rear bracket mechanism. The rear bracket mechanism includes two rear lifting brackets 13 that extend substantially parallel in the x direction, namely the left rear lifting bracket 13 and the right rear lifting bracket 13. The rear load-bearing assembly 7 further includes a rear seat pan plate 14, and the rear seat pan plate 14 fixedly connects the two rear lifting brackets 13 to each other, for example, by welding, at the rear end. Here, the two rear lifting brackets 13 and the rear seat pan plate 14 together substantially enclose a load-bearing area for supporting the occupant's hip area, and load-bearing springs (not shown) can be additionally provided therein to form a planar support area (which can also be called the rear seat pan area).

[0047] By Figure 2a and Figure 2b it can be seen that each rear lifting bracket 13 successively includes a central pivot point 15 and a swing arm assembly connection point 16 from front to back in the x direction. Each connection point 15, 16 can be configured as a connection hole, for example, on the rear lifting bracket 13.

[0048] Each rear lifting bracket 13 is pivotally connected to the fixing bracket 9 via its own central pivot point 15. Specifically, seeFigure 2b The pivot pin 18 passes through the rear connection hole 19 of the fixed bracket 9 and the central pivot hole 15 of the rear lifting bracket 13 at the same time, so that the rear lifting bracket 13 can pivot relative to the fixed bracket 9 on the same side by means of the pivot pin 18. Since the fixed bracket 9 is fixedly connected, welded to the seat frame assembly 5 here, the two rear lifting brackets 13 can pivot relative to the seat frame assembly 5 at the same time, so as to pivotally lift or sink the rear load-bearing assembly 7 from the rear side.

[0049] Each rear lifting bracket 13 is connected to the swing arm assembly 8 via its own swing arm assembly connection point 16. Specifically, the guide pin 22 passes through the chute 21 of the swing arm 20 and is inserted and connected to the swing arm assembly connection hole 16 of the rear lifting bracket 13, so that the guide pin 22 can be guided to slide in the chute 21 of the swing arm 20 during the swinging movement of the swing arm 20. As will be described in detail below, the rear lifting bracket 13 fixedly connected to the guide pin 22 can be driven by the chute 21 of the swing arm 20 to perform a pivoting movement. In some embodiments, the rear lifting bracket 13 can be indirectly connected to the rear chute 21 of the swing arm 20 via an additionally provided link mechanism, which is hingedly connected to the rear lifting bracket 13 on the one hand and slidably hingedly connected to the rear chute 21 of the swing arm 20 on the other hand, so that the rear lifting bracket 13 can be indirectly driven by the rear chute 21 of the swing arm 20 via the link mechanism.

[0050] The swing arm assembly 8 includes two swing arms 20 arranged oppositely on the left and right sides, namely the left swing arm 20 and the right swing arm 20, and a connecting shaft 26 extending in the y direction that fixedly connects them to each other, for example, by welding, at the connection shaft hole 35.

[0051] Figure 3 A schematic diagram showing the left swing arm 20 separately as an example. It can be seen here that the swing arm 20 can be formed in a substantially L shape, so it can include a lower driving arm 27 and a following arm 28 arranged rearward in the x direction. Also refer to Figure 2b, the left swing arm 20 can have a central pivot point 29 at its center, at the intersection of its two arms 27, 28, which is configured as a central pivot hole here. The pivot pin 30 can pass through the front connection hole 31 of the fixed bracket 9 and the central pivot hole 29 of the swing arm 20 at the same time, so that the swing arm 20 is pivotally connected to the fixed bracket 9. The drive arm 27 of one of the swing arms 20, here the left swing arm 20, also has a drive component connection hole 32 at the lowermost position. The lead screw 34 of the motor of the drive component 33 can be pivotally connected to the drive component connection hole 32 to drive the drive arm 27 and thus the entire swing arm 20 to swing around the central pivot hole 29. Here, the drive component 33 can be fixed to the left fixed bracket 9 with its fixed side. The lead screw 34 can perform both telescopic movement and pivotal movement to realize driving the swing arm 20 to perform swing movement. The drive arm 27 has a connection shaft hole 35 above the drive component connection hole 32. The connection shaft 26 is fixedly connected, here welded, to the connection shaft holes 35 of the two swing arms 20 with one of its ends respectively. Therefore, when the drive component 33 pushes or pulls the left swing arm 20 to swing, the driving force is simultaneously transmitted to the right swing arm 20 through the connection shaft 26 and drives the right swing arm 20 to swing synchronously. Therefore, only one drive component 33 (with one motor) is set here to realize the synchronous swing of the two swing arms 20. Therefore, there is no need to set additional drive component connection holes 32 and drive components 33 on the right swing arm 20.

[0052] The driven arm 28 has a chute 21, which extends substantially in the z direction in the designed position or the initial position of the load-carrying assembly 4. The driven arm 28 is arranged here at the rear side of the central pivot hole 29, and an implementation scheme in which it is arranged at the front side of the central pivot hole 29 can also be considered. Combined Figure 5a and Figure 5b As shown, the chute 21 has or is configured as a curved drive groove section A1 - A2 here. The drive groove section A1 - A2 is not a part of a complete circle centered on the central pivot point 29 here. In the initial position of the load-carrying assembly 4, the drive groove section A1 - A2 of the chute 21 extends backward and downward away from the central pivot point 29.

[0053] In addition, an anti-wear bushing 37 can be embedded in the chute 21, so that the guide pin 22 can slide anti-wear in the anti-wear bushing 37 of the chute 21.

[0054] Figure 4Schematically shows a kinematic diagram of the rear load-bearing assembly 7 during the lifting process. Here, the two swing arms 20 are driven clockwise by the drive assembly 33 and thus drive the rear lifting bracket 13 of the rear bracket mechanism to pivot upward from the rear side by means of the drive groove sections A1 - A2 of their sliding grooves 21. Here, the drive trajectories of the drive groove sections A1 - A2 of the two swing arms 20 are equivalent to and are shown here as cam rotation trajectories. The two swing arms 20 directly drive the two rear lifting brackets 13 to pivot upward around the central pivot point 15 relative to the fixed bracket 9 at the swing arm assembly connection points 16 of the two rear lifting brackets 13, realizing the pivoting lift of the rear load-bearing assembly 7 from the rear side. It can be envisioned that by driving the two swing arms 20 counterclockwise in reverse, the pivoting sink of the rear load-bearing assembly 7 from the rear lifted position to the initial position can be achieved. The rear lifted position can be understood here as the highest limit position to which the rear load-bearing assembly 7 can be lifted. And multiple intermediate positions can be included between the rear lifted position and the initial position. For example, by controlling the stroke of the motor, the rear load-bearing assembly 6 can be pivotally rotated and stopped at these intermediate positions steplessly.

[0055] Figure 5a and Figure 5b Schematically show the schematic diagrams of the initial position and the rear lifted position of the rear load-bearing assembly 7 respectively, and different states of the swing arms 20 are also shown here. Figure 6a and Figure 6b Schematically show the component diagrams of the initial position and the rear lifted position of the rear load-bearing assembly 7 respectively, and different states of the corresponding components are shown here.

[0056] From Figures 5a to 6b the views shown, it can be seen again that the swing arms 20 are pivotally hinged to the fixed bracket 9 at their central pivot points 29, and the front ends of the rear lifting brackets 13 of the rear bracket mechanism are pivotally hinged to the fixed bracket 9. Since the fixed bracket 9 is fixedly connected to the seat frame assembly 5, during each lifting process, these hinge points hinged to the fixed bracket 9 always remain in the same position and become pivot centers.

[0057] Refer to Figure 5a and Figure 6a In the initial position of the rear load-bearing assembly 7 shown, the front seat pan 6 and the rear load-bearing assembly 7 extend substantially horizontally to jointly form a substantially horizontal seating area of the seat cushion 2. The guide pin 22 of the rear lifting bracket 13 of the rear bracket mechanism is substantially at the starting point A1 of the drive groove section A1 - A2 of the sliding groove 21 of the swing arm 20, and this starting point A1 is configured here as the upper stop point of the sliding groove 21.

[0058] Refer to Figure 5b and Figure 6bThe rear-lifting position of the rear load-bearing assembly 7 shown, compared to the initial position, the rear load-bearing assembly 7 or rather its rear-lifting bracket 13 is pivotally lifted upwards by an angle (which can also be called the seat cushion leveling angle, for example, about 20 degrees, at this time the seat cushion 2 is level with the backrest 3). Since the front seat pan 6 is fixedly connected to the seat frame assembly 5, the front seat pan 6 remains stationary during the movement of the rear load-bearing assembly 7, specifically, its position relative to the seat frame assembly 5 remains unchanged. In the rear-lifting position of the rear load-bearing assembly 7, the drive assembly 33 has driven the swing arm 20 to rotate clockwise backwards by an angle, and the guide pin 22 of the rear-lifting bracket 13 of the rear support mechanism has completed the driving groove section A1 - A2 of the sliding groove 21 of the swing arm 20 and has reached its end point A2, and this end point A2 constitutes the lower stop point of the sliding groove 21 here. During the process of the swing arm 20 driving the rear-lifting bracket 13 to pivot clockwise, the rear load-bearing assembly 7 is pivotally lifted to the rear-lifting position.

[0059] See Figure 10 , in the case of the large recline of the backrest 3, by pivotally lifting the rear load-bearing assembly 7 of the load-bearing assembly 4 from the rear side, the seat cushion surface 49 and the backrest surface 50 can be made substantially level, thereby solving the problem of lumbar support caused by the non-leveling of the two when the occupant takes a nap and forms a bed or a combined bed.

[0060] Figure 7 Schematically shows a first variant embodiment. Here, for the drive assembly 33, instead of the drive assembly 33 in the previous embodiment being fixed to the fixed bracket 9 with its fixed side and the fixed bracket 9 being fixed to the upper side plate 10 of the seat frame assembly 5 (shown in the left figure), in this first variant embodiment, the drive assembly 33 is fixed to the seat frame lower vertical plate 55 or rather the seat frame lower bracket connected to the upper slide rail of the seat frame assembly 5 with its fixed side (shown in the right figure). Here, the motor model of the drive assembly 33 can also be changed accordingly, for example, a zero-voltage motor can be used instead.

[0061] Figure 8 Schematically shows a second variant embodiment. Here, for the anti-wear bushing 37 in the sliding groove 21 of the swing arm 20, instead of the anti-wear bushing 37 being fixedly embedded in the entire sliding groove 21 of the swing arm 20 in the previous embodiment, in this second variant embodiment, such an anti-wear bushing 37 is omitted, and the guide pin 22 is replaced with a bolt - bushing combination. Here, the bolt 56 can include a smooth rod portion near the bolt head and a threaded portion away from the bolt head. The bushing 57 (for example, made of plastic) can be sleeved on the smooth rod portion of the bolt 56 on the one hand, and inserted into the sliding groove 21 and slidably guided by it on the other hand. And the threaded portion of the bolt 56 can be connected to the rear-lifting bracket 13. This can save the material of the anti-wear bushing 37.

[0062] Figure 9Schematically shows a third variant embodiment. Here, for the drive assembly 33, instead of the drive assembly 33 being hinged at the drive arm 27 of the swing arm 20 on its drive side in the previous embodiment (as shown in the left figure), in this third variant embodiment, the drive assembly 33 is hinged at the connecting shaft 26 on its drive side by means of a motor bracket 58 (as shown in the right figure), and the connecting shaft 26 connects the two swing arms 20 as described above. Here, by driving the connecting shaft 26 to move by the drive assembly 33, the synchronous drive of the two swing arms 20 can be achieved.

[0063] In addition, in some embodiments, only one of the left swing arm 20 and the right swing arm 20 has a chute 21, and the other of the left swing arm 20 and the right swing arm 20 does not have a chute 21. That is to say, only one of the left swing arm 20 and the right swing arm 20 is responsible for driving the lifting of the rear bearing assembly 7.

[0064] In the present invention, the lifting of the rear bearing assembly 7 and the leveling of the rear bearing assembly 7 and thus the seat cushion 2 and the backrest 3 can be achieved only by one drive assembly 33 with one motor by means of the swing arm 20. Therefore, to achieve the same function, fewer parts are required, less seat space is occupied, the structural space is compact, and it can be adapted to other functions such as high profile and zero pressure. By means of this one drive assembly 33 and the swing arm 20, the rear leveling function can be achieved at any position of the backrest 2 and the angle of the rear lift can be adjusted arbitrarily to meet the comfort requirements of passengers of different body types.

[0065] Finally, it should be pointed out that the above-mentioned various embodiments are only used to understand and explain the present invention, and do not constitute a limitation to the protection scope of the present invention. For those skilled in the art, modifications or re-combinations can be made on the basis of the above embodiments, and they all do not depart from the protection scope of the present invention.

Claims

1. A vehicle seat with a function of lifting the rear part of the seat cushion, characterized in that, The vehicle seat has a seat cushion, and the seat cushion has a load-bearing assembly for supporting an occupant and a seat frame assembly for supporting the load-bearing assembly. The load-bearing assembly includes: A front seat basin, which is fixedly connected to the seat frame assembly; A rear load-bearing component, which can pivot relative to the seat frame assembly between its initial position and a raised position; A swing arm assembly, which has a left swing arm and a right swing arm arranged oppositely. The left swing arm and the right swing arm are respectively directly or indirectly hinged to the seat frame assembly, and the rear load-bearing component is drivingly connected to at least one of the left swing arm and the right swing arm; and A drive assembly, which can drive the at least one swing arm to swing. Through the swinging movement of the at least one swing arm, the rear load-bearing component can be driven to pivot between its initial position and a raised position.

2. The vehicle seat according to claim 1, characterized in that, The rear load-bearing component includes a rear support mechanism, which is drivingly connected to the at least one swing arm. Through the swinging movement of the at least one swing arm, the rear support mechanism can be driven to pivot, and through the pivoting movement of the rear support mechanism, the rear load-bearing component can be driven to pivot between its initial position and a raised position.

3. The vehicle seat according to claim 2, characterized in that, The at least one swing arm has at least one chute, and the chute has or is configured as a curved drive groove section. The rear support mechanism can be slidably hinged in the drive groove section of the chute. Wherein, through the sliding of the rear support mechanism in the drive groove section of the chute, the rear load-bearing component can be driven to pivot between its initial position and a raised position.

4. The vehicle seat according to claim 3, characterized in that, The left swing arm has a chute, and the right swing arm has a chute; or, One of the left swing arm and the right swing arm has a chute, and the other of the left swing arm and the right swing arm does not have a chute.

5. The vehicle seat according to claim 2, characterized in that, The rear support mechanism has two opposed rear lifting brackets, and the two rear lifting brackets are directly or indirectly hinged to the seat frame assembly at their first hinge connection points.

6. The vehicle seat according to claim 5, characterized in that, At least one of the two rear lifting brackets is drivingly connected to the at least one swing arm at its second hinge connection point behind the first hinge connection point.

7. The vehicle seat according to claim 3, characterized in that, An anti-wear bushing is fixedly arranged in at least one of the chutes, and the rear support mechanism slides in the anti-wear bushing by means of a guide pin accordingly; or, The rear support mechanism slides in at least one of the chutes by means of a bolt-bushing combination, and the bolt-bushing combination includes a bolt and a bushing sleeved on the bolt. The bushing is embedded in at least one of the chutes accordingly and can slide along it.

8. The vehicle seat according to claim 1, characterized in that, The swing arm assembly also has a connecting shaft for fixedly connecting the left swing arm and the right swing arm to each other.

9. The vehicle seat according to claim 8, characterized in that, The drive assembly is directly or indirectly fixed to the seat frame assembly on its fixed side and is directly or indirectly fixed to the left swing arm, the right swing arm or the connecting shaft on its drive side.

10. The vehicle seat according to claim 1, characterized in that, The vehicle seat also has a backrest that can pivotally adjust towards and away from the seat cushion.

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