Seat assembly for a motor vehicle

Abstract

This disclosure relates to a seat assembly for a motor vehicle, comprising: a seat cushion; a seat back; first and second backrest drive devices; and a linkage mechanism including first and second linkage mechanisms that can be driven independently of each other; the first linkage mechanism includes at least one constrained end and at least one movable end, and the first linkage mechanism is pivotable under the drive of the first backrest drive device; the seat back is pivotally connected to a corresponding movable end of the first linkage mechanism and is pivotable under the drive of the second backrest drive device, the first backrest drive device including a constrained end and a movable end, the first backrest drive device being pivotable about a pivot portion at its constrained end, the movable end of the first backrest drive device being pivotally connected to the first linkage mechanism, and the first backrest drive device being used to drive the first linkage mechanism by changing the distance between its constrained end and movable end.

Description

Technical Field

[0001] This disclosure generally relates to the technical field of vehicle seats. More particularly, this disclosure relates to a seat assembly for a motor vehicle. Background Technology

[0002] Seating assemblies for motor vehicles typically include a seat cushion and a seat back. It is known in the art to design seating assemblies for motor vehicles to be movable between two or more positions to provide a more comfortable seating experience for occupants. For example, some seating assemblies are designed to be movable between a folded position, a designed position, and an easy-access (also known as “EZE”) position. In the folded position, the seat back pivots toward the seat cushion and folds over it to increase, for example, cargo space in the motor vehicle. In the easy-access position, at least the seat back of the seating assembly can tilt forward to increase access space behind the seating assembly. Some seating assemblies are also designed to include a reclining position, in which the seat back pivots away from the seat cushion to a substantially horizontal position, thus forming a “double bed mode” or “double bed state” so that an occupant can lie down on the seating assembly. Other seating assemblies are also designed to include a “zero-gravity” position, in which an occupant can sit on the seating assembly in a substantially zero-pressure posture, thus feeling more comfortable.

[0003] However, while existing seat assemblies offer some angle adjustment for functions such as folding, reclining, and easy entry, the bottom of the backrest is typically mounted on the seat cushion (or its frame), or the angle adjustment is usually driven by a single motor. This structure presents several drawbacks. For example, because the bottom of the backrest is attached to the seat cushion, the center of rotation cannot be adjusted independently of the seat cushion. This makes it difficult to achieve the most comfortable seating experience in certain positions. For instance, when the seat is reclined, the seat cushion and / or backrest cannot be adjusted independently of each other, potentially creating a height difference between the seat cushion and the horizontally positioned backrest, thus affecting the occupant's reclining experience. Alternatively, when the seat assembly is in a zero-gravity position, the bottom of the seat back may be pressing against the occupant's lower back, while the top of the seat back may not be in contact with the occupant's shoulders, resulting in problems such as the occupant being pushed against their lower back and lacking shoulder support, thus affecting the occupant's riding experience.

[0004] Therefore, there is a need to improve existing seat components. Utility Model Content

[0005] The purpose of this disclosure is to provide a seat assembly for a motor vehicle that overcomes at least one deficiency in the prior art.

[0006] According to some embodiments of this disclosure, a seat assembly for a motor vehicle is provided. The seat assembly includes: a seat cushion; a seat back; a first backrest drive; a second backrest drive; and a linkage mechanism configured to allow the seat assembly to move between a plurality of positions; wherein the linkage mechanism includes a first linkage mechanism for the seat back and a second linkage mechanism for the seat cushion, the first linkage mechanism and the second linkage mechanism being configured to be driven independently of each other; wherein the first linkage mechanism includes at least one restrained end and at least one movable end, the first linkage mechanism being pivotable about a pivot portion disposed at a corresponding restrained end of the at least one restrained end of the first linkage mechanism under the drive of the first backrest drive; wherein the seat back is adjacent to The bottom end of the seat cushion is pivotally connected to a corresponding movable end of at least one of the movable ends of the first linkage mechanism, such that the seat back can pivot relative to the first linkage mechanism about a pivot portion disposed at the corresponding movable end of the first linkage mechanism under the drive of a second backrest drive device; wherein, the first backrest drive device includes a constraint end and a movable end, the first backrest drive device is pivotable about a pivot portion disposed at the constraint end of the first backrest drive device, the movable end of the first backrest drive device is pivotally connected to the first linkage mechanism, and the first backrest drive device is configured to drive the first linkage mechanism by changing the distance between the constraint end and the movable end of the first backrest drive device.

[0007] According to some embodiments of this disclosure, the first linkage mechanism includes a single, unique linkage member, which includes a constrained end and a movable end. The movable end of the first backrest drive device is pivotally connected to the single linkage member, which is an active linkage member. The first backrest drive device is configured to drive the single linkage member, which is an active linkage member, to pivot about a pivot portion disposed at its constrained end. The bottom end of the seat back near the seat cushion is pivotally connected to the movable end of the single linkage member. The second backrest drive device is configured to drive the seat back to pivot about a pivot portion disposed at the movable end of the single linkage member.

[0008] According to some embodiments of this disclosure, the first linkage mechanism includes a first linkage member, a second linkage member, and a third linkage member. The first linkage member and the second linkage member each include a constrained end and a movable end. The third linkage member includes a first foot, a second foot, and a third foot. The movable ends of the first linkage member and the second linkage member are pivotally connected to the first and second feet of the third linkage member, respectively. The bottom end of the seat back near the seat cushion is pivotally connected to the third foot of the third linkage member. One of the first linkage member or the second linkage member serves as an active linkage member. The movable end of the first backrest drive device is pivotally connected to the active linkage member. The first backrest drive device is configured to drive the active linkage member to pivot the first linkage member about a first pivot portion disposed at its constrained end and to pivot the second linkage member about a second pivot portion disposed at its constrained end. The second backrest drive device is configured to drive the seat back to pivot about a third pivot portion disposed at the third foot of the third linkage member.

[0009] According to some embodiments of this disclosure, the first backrest drive device includes a motor and a lead screw, the motor being drivenly connected to the lead screw so that the lead screw can move relative to the motor, and the motor and the lead screw respectively forming one of the constrained end and the movable end of the first backrest drive device.

[0010] According to some embodiments of this disclosure, the first backrest drive device includes a motor, a lead screw, and a nut slider, the motor being configured to drive the nut slider to move relative to the motor via the lead screw, the motor and the nut slider respectively forming one of the constrained end and the movable end of the first backrest drive device.

[0011] According to some embodiments of the present disclosure, the first backrest drive device includes a motor and a rack and pinion mechanism, the motor being configured to drive the rack relative to the motor via the gear, the motor and the rack forming one of the constrained end and the movable end of the first backrest drive device, respectively.

[0012] According to some embodiments of this disclosure, the movable end of the first backrest drive device is pivotally connected to the active linkage to form a pivot drive portion, the pivot drive portion being located outside the line connecting the constraint end and the movable end of the active linkage.

[0013] According to some embodiments of this disclosure, the movable end of the first backrest drive device is pivotally connected to the active linkage to form a pivot drive portion, the pivot drive portion being located between the constrained end and the movable end of the active linkage.

[0014] According to some embodiments of this disclosure, the constraint end of the first backrest drive device is located in front of the constraint end of the active linkage.

[0015] According to some embodiments of this disclosure, the first backrest drive device and the active linkage are designed such that when the distance between the constrained end and the movable end of the first backrest drive device is shortened, the active linkage pivots forward.

[0016] According to some embodiments of this disclosure, the constraint end of the first backrest drive device is located after the constraint end of the active linkage.

[0017] According to some embodiments of this disclosure, the first backrest drive device and the active linkage are designed such that when the distance between the constrained end and the movable end of the first backrest drive device is shortened, the active linkage pivots rearward.

[0018] According to some embodiments of this disclosure, the seat assembly includes a base assembly, and the seat back includes a backrest frame, wherein the constraint ends of the first backrest drive device, the first linkage member and the second linkage member of the first linkage mechanism are pivotally connected to the base assembly, and the second backrest drive device and the third linkage member of the first linkage mechanism are mounted on the backrest frame.

[0019] According to some embodiments of this disclosure, the first linkage mechanism includes two first linkage members, two second linkage members, and two third linkage members. The two third linkage members are respectively mounted on the left and right sides of the backrest frame. The movable ends of the two first linkage members of the first linkage mechanism are pivotally connected to one of the third linkage members, and the movable ends of the two second linkage members of the first linkage mechanism are pivotally connected to one of the third linkage members.

[0020] According to some embodiments of this disclosure, the second backrest drive device includes a motor and an angle adjuster.

[0021] According to some embodiments of this disclosure, the third linkage member of the first linkage mechanism is configured as a connecting plate for the angle adjuster.

[0022] According to some embodiments of this disclosure, the second linkage mechanism includes at least one constrained end and at least one movable end, a corresponding movable end of the at least one movable end of the second linkage mechanism being pivotally connected to the seat cushion, and the second linkage mechanism being configured to pivot about a pivot portion disposed at a corresponding constrained end of the at least one constrained end of the second linkage mechanism under the drive of at least one seat cushion driving device.

[0023] According to some embodiments of this disclosure, the second linkage mechanism includes a first linkage member and a second linkage member. The first linkage member and the second linkage member of the second linkage mechanism each include a constrained end and a movable end. The end of the seat cushion near the seat back is pivotally connected to the movable end of the first linkage member of the second linkage mechanism, while the other end away from the seat back is pivotally connected to the movable end of the second linkage member of the second linkage mechanism.

[0024] According to some embodiments of this disclosure, the first or second linkage member of the second linkage mechanism is configured to pivot about a pivot portion disposed at the constraint end of the corresponding first or second linkage member of the second linkage mechanism under the drive of the seat cushion driving device.

[0025] According to some embodiments of this disclosure, the seat cushion includes a seat cushion frame, the seat cushion frame including two side connectors located on the left and right sides, a front connector for connecting the two side connectors to the front of the two side connectors, and a rear connector for connecting the two side connectors to the rear of the two side connectors; wherein, the second linkage mechanism includes two first linkage members and two second linkage members, the two first linkage members of the second linkage mechanism are respectively installed on the left and right sides of the seat cushion frame at the rear of the two side connectors, and the two second linkage members of the second linkage mechanism are respectively installed on the left and right sides of the seat cushion frame at the front of the two side connectors.

[0026] According to some embodiments of this disclosure, the seat cushion drive device includes a motor, which is mounted on the inside of one of the two side connectors.

[0027] According to some embodiments of this disclosure, the seat assembly includes a base assembly, and the constraint ends of the first linkage member and the second linkage member of the second linkage mechanism are pivotally connected to the base assembly.

[0028] According to some embodiments of this disclosure, the seat assembly is configured to move between a design position, a raised position, a folded position, a reclining position, and a convenient access position, wherein: in the design position, the seat back of the seat assembly forms a predetermined angle with respect to the seat cushion for occupant support; in the raised position, the seat cushion of the seat assembly is raised or lowered by a predetermined height relative to the design position; in the folded position, the seat back of the seat assembly is substantially overlapped with the seat cushion to increase the space of the vehicle; in the reclining position, the seat back of the seat assembly is substantially flush with the seat cushion; and in the convenient access position, the seat back of the seat assembly pivots towards the seat cushion by a predetermined angle relative to the design position and / or the seat cushion moves forward a predetermined distance relative to the design position to increase the space behind the seat assembly for easy occupant entry and exit.

[0029] According to some embodiments of this disclosure, the second linkage mechanism includes a first linkage member, a second linkage member, and a third linkage member. The first linkage member of the second linkage mechanism includes a constrained end and a movable end. The second linkage member of the second linkage mechanism includes a first movable end and a second movable end. The third linkage member of the second linkage mechanism includes a constrained end and a movable end. The end of the seat cushion near the seat back is pivotally connected to the movable end of the first linkage member of the second linkage mechanism, while the other end away from the seat back is pivotally connected to the first movable end of the second linkage member of the second linkage mechanism. The second movable end of the second linkage member of the second linkage mechanism is pivotally connected to the movable end of the third linkage member of the second linkage mechanism.

[0030] According to some embodiments of this disclosure, the seat assembly is configured to move between a designed position, a high-adjustment position, a zero-gravity position, a folded position, a reclining position, and a convenient access position, wherein: in the designed position, the seat back of the seat assembly forms a predetermined angle with respect to the seat cushion for occupant support; in the high-adjustment position, the seat cushion of the seat assembly is raised or lowered by a predetermined height relative to the designed position; in the zero-gravity position, the seat assembly is adjusted to a designed zero-pressure state; in the folded position, the seat back of the seat assembly and the seat cushion are substantially overlapped to increase the space of the vehicle; in the reclining position, the seat back of the seat assembly is substantially flush with the seat cushion; and in the convenient access position, the seat back of the seat assembly pivots towards the seat cushion by a predetermined angle relative to the designed position and / or the seat cushion moves forward a predetermined distance relative to the designed position to increase the space behind the seat assembly for easy occupant entry and exit.

[0031] According to some embodiments of this disclosure, one of the second linkage member and the third linkage member of the second linkage mechanism is configured as a zero-gravity linkage member for realizing the zero-gravity position of the seat assembly.

[0032] According to some embodiments of this disclosure, the seat assembly includes a first seat cushion drive device and a second seat cushion drive device. The first seat cushion drive device is used to drive a first linkage member of the second linkage mechanism to pivot about a first pivot portion disposed at the constraint end of the first linkage member of the second linkage mechanism, while the second seat cushion drive device is used to drive the zero-gravity linkage member to pivot.

[0033] According to some embodiments of this disclosure, during the movement of the seat assembly from the designed position to the zero-gravity position, the first seat cushion drive device locks the first linkage member of the second linkage mechanism so that it cannot move; and during the movement of the seat assembly from the designed position to other positions besides the zero-gravity position, the second seat cushion drive device locks the zero-gravity linkage member of the second linkage mechanism so that it cannot move.

[0034] According to some embodiments of this disclosure, the second linkage mechanism includes a first linkage member and a second linkage member, wherein the first linkage member of the second linkage mechanism is configured as a slide plate, and the second linkage member of the second linkage mechanism includes a constrained end and a movable end, wherein one end of the seat cushion near the seat back is slidably mounted in the slide groove of the slide plate, and the other end away from the seat back is pivotally connected to the movable end of the second linkage member of the second linkage mechanism.

[0035] According to some embodiments of this disclosure, the second linkage member of the second linkage mechanism is configured to pivot about a pivot portion disposed at the constraint end of the second linkage member of the second linkage mechanism under the drive of the cushion driving device, and when the second linkage member pivots, one end of the seat cushion near the seat back slides in the groove of the slide plate.

[0036] According to some embodiments of this disclosure, the seat assembly is configured to move between a designed position, a folded position, a reclining position, and an easy-entry position. In the designed position, the seat back of the seat assembly is at a predetermined angle relative to the seat cushion to support an occupant. In the folded position, the seat back of the seat assembly is substantially overlapped with the seat cushion to increase the space of the vehicle. In the reclining position, the seat back of the seat assembly is substantially flush with the seat cushion. In the easy-entry position, the seat back of the seat assembly is pivoted towards the seat cushion at a predetermined angle relative to the designed position, and / or the seat cushion is moved forward a predetermined distance relative to the designed position to increase the space behind the seat assembly for easy occupant entry and exit.

[0037] According to some embodiments of this disclosure, at least one constraint end of the first linkage mechanism can be pivotally mounted on a vehicle floor, or can be pivotally mounted on a slide rail that can slide relative to the vehicle floor to move the seat assembly, or can be pivotally mounted on a rotating component that can rotate relative to the vehicle floor to rotate the seat assembly about a vertical direction.

[0038] According to some embodiments of this disclosure, at least one constraint end of the second linkage mechanism can be pivotally mounted on a vehicle floor, or pivotally mounted on a slide rail that can slide relative to the vehicle floor to move the seat assembly, or pivotally mounted on a rotating component that can rotate relative to the vehicle floor to rotate the seat assembly about a vertical direction.

[0039] It should be noted that aspects of this disclosure described with respect to one embodiment can be included in other different embodiments, although these other different embodiments are not specifically described. In other words, features of all embodiments and / or any embodiments can be combined in any manner and / or combination, as long as they do not contradict each other. Attached Figure Description

[0040] Many aspects of this disclosure will be better understood after reading the following detailed description in conjunction with the accompanying drawings, in which:

[0041] Figure 1 A seat assembly for a motor vehicle according to one embodiment of the present disclosure is schematically shown.

[0042] Figure 2 A schematic diagram of a seat assembly and its linkage mechanism according to one embodiment of the present disclosure is shown in a design position.

[0043] Figure 3 The diagram illustrates the basis for being in a lying position. Figure 2 A schematic diagram of the seat assembly and its linkage mechanism;

[0044] Figure 4 The diagram illustrates the basis for the folded position. Figure 2 A schematic diagram of the seat assembly and its linkage mechanism;

[0045] Figure 5 The diagram illustrates the basis for the easily accessible location. Figure 2 A schematic diagram of the seat assembly and its linkage mechanism;

[0046] Figure 6 The illustration shows the basis for being in a high-profile position. Figure 2 A schematic diagram of the seat assembly and its linkage mechanism;

[0047] Figure 7 A portion of the backrest assembly of a seat assembly according to one embodiment of the present disclosure is shown schematically;

[0048] Figure 8 An exploded view schematically illustrates a second backrest drive device according to an embodiment of the present disclosure;

[0049] Figure 9 A seat cushion assembly of a seat assembly according to one embodiment of the present disclosure is schematically shown;

[0050] Figure 10 Schematic illustration based on Figure 9 A portion of the seat assembly, showing some components of the seat assembly;

[0051] Figure 11 Schematic illustration based on Figure 10 Exploded view of some components of the seat cushion assembly;

[0052] Figure 12 Schematic illustration based on Figure 9 The structure of the side connector of the seat cushion assembly and the motor for mounting the seat cushion drive device;

[0053] Figure 13 A base assembly of a seat assembly according to one embodiment of the present disclosure is schematically shown;

[0054] Figure 14 Schematic illustration based on Figure 13 Exploded view of some components of the base assembly;

[0055] Figure 15 Schematic illustration based on Figure 9 The seat cushion assembly and according to Figure 13 Assembly of the base assembly;

[0056] Figure 16Schematic illustration based on Figure 7 The backrest assembly and according to Figure 13 Assembly of the base assembly;

[0057] Figures 17 to 23 The following are schematic diagrams based on: Figure 2 A schematic diagram of a modified linkage mechanism for the seat components;

[0058] Figure 24 A schematic diagram of the linkage mechanism of a seat assembly according to one embodiment of the present disclosure is shown.

[0059] Figures 25 to 29 The following are schematic diagrams based on: Figure 24 A schematic diagram of a modified linkage mechanism for the seat components;

[0060] Figure 30 A schematic diagram of the linkage mechanism of a seat assembly according to one embodiment of the present disclosure is shown.

[0061] Figures 31 to 37 The following are schematic diagrams based on: Figure 30 A schematic diagram of a modified linkage mechanism for the seat components;

[0062] Figure 38 A schematic diagram of the linkage mechanism of a seat assembly according to one embodiment of the present disclosure is shown.

[0063] Figure 39 A schematic diagram of the linkage mechanism of a seat assembly according to one embodiment of the present disclosure is shown.

[0064] Figure 40 A schematic diagram of the linkage mechanism of a seat assembly according to one embodiment of the present disclosure is shown.

[0065] Figure 41 A schematic diagram of the linkage mechanism of a seat assembly according to one embodiment of the present disclosure is shown.

[0066] It should be understood that the same reference numerals denote the same elements in all the accompanying drawings. For clarity, the dimensions of some features may be altered and they may not be drawn to scale. Detailed Implementation

[0067] The present disclosure will now be described with reference to the accompanying drawings, which illustrate several embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure more complete and to fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide further additional embodiments.

[0068] It should be understood that the terminology used in this specification is for describing specific embodiments only and is not intended to limit this disclosure. All terms used in this specification (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. For the sake of brevity and / or clarity, well-known functions or structures may not be described in detail.

[0069] Unless otherwise specified, the singular forms “a,” “the,” and “the” used in this specification include the plural forms. The terms “comprising,” “including,” and “containing” used in this specification indicate the presence of the claimed feature but do not exclude the presence of one or more other features. The term “and / or” used in this specification includes any and all combinations of one or more of the relevant listed items.

[0070] When a component is described in the specification as being "on", "attached" to, "connected" to, "joined" to, or "in contact" with another component, the component may be directly located on, attached to, connected to, joined to, or in contact with the other component, or there may be an intermediate component present.

[0071] In this specification, the terms "first," "second," "third," etc., are used for ease of explanation only and are not intended to be limiting. Any technical feature represented by "first," "second," "third," etc., is interchangeable.

[0072] In the specification, spatial relation terms such as "above," "below," "front," "back," "top," and "bottom" describe the relationship between one feature and another in the accompanying drawings. It should be understood that spatial relation terms include not only the orientation shown in the drawings but also the different orientations of the device during use or operation. For example, when the device in the drawings is inverted, a feature previously described as "below" other features can now be described as "above" other features. The device can also be oriented in other ways (rotated 90 degrees or in other orientations), in which case the relative spatial relationships will be explained accordingly.

[0073] This disclosure relates to a seat assembly for a motor vehicle that is movable between multiple positions to achieve a specific function. For example... Figure 1As shown, the seat assembly 1 according to this disclosure may include a seat cushion 2 and a seat back 3. The seat assembly 1 according to this disclosure may also include a linkage mechanism 150, which is configured to move the seat cushion 2 and the seat back 3 to realize the movement of the seat assembly 1 between multiple positions.

[0074] Figures 2 to 6 A schematic diagram of a seat assembly 1 and its linkage mechanism according to one embodiment of the present disclosure is shown as an example.

[0075] like Figure 2 As can be most clearly seen, the linkage mechanism 150 of the seat assembly 1 according to this disclosure includes a first linkage mechanism 151 for the seat back 3 and a second linkage mechanism 152 for the seat cushion 2. The first linkage mechanism 151 and the second linkage mechanism 152 can be configured to be driven independently of each other.

[0076] like Figure 2 As shown, in an embodiment according to this disclosure, the first linkage mechanism 151 can be configured as a "four-bar" linkage mechanism. The first linkage mechanism 151 may include a first linkage member 1511, a second linkage member 1512, and a third linkage member 1513. The first linkage member 1511 may include a restrained end 1511-1 and a movable end 1511-2, and the second linkage member 1512 may include a restrained end 1512-1 and a movable end 1512-2. The third linkage member 1513 may include a first foot 1513-1, a second foot 1513-2, and a third foot 1513-3. For example, the third linkage member 1513 may be configured as a triangle. In particular, the first foot 1513-1, the second foot 1513-2, and the third foot 1513-3 of the third linkage member 1513 may form a triangular shape. However, this disclosure is not limited to this; the third linkage member 1513 may also be configured as a quadrilateral, a pentagon, or other polygonal or other shapes. The constraint ends 1511-1 of the first linkage 1511 and 1512-1 of the second linkage 1512 can be pivotally mounted, for example, directly, on the vehicle floor, or pivotally mounted on a slide rail that can slide relative to the vehicle floor to move the seat assembly 1, or pivotally mounted on a rotating component that can rotate relative to the vehicle floor to rotate the seat assembly 1 about a vertical direction. These constraint ends 1511-1 and 1512-1 can also be pivotally mounted, for example, indirectly, via an intermediate component, such as the base assembly mentioned below, on the vehicle floor, slide rail, or rotating component. The movable ends 1511-2 of the first linkage 1511 and 1512-2 of the second linkage 1512 can be pivotally connected to the first foot 1513-1 and the second foot 1513-2 of the third linkage 1513, respectively.

[0077] In this embodiment, the first linkage 1511, the second linkage 1512, the third linkage 1513, and the components (vehicle floor, slide rail, or rotating component) on which the constraint end 1511-1 of the first linkage 1511 and the constraint end 1512-1 of the second linkage 1512 are mounted constitute a so-called "four-bar" linkage mechanism. In this embodiment, one of the first linkage 1511 and the second linkage 1512 of the first linkage mechanism 151, which is the active linkage, can be driven by the first backrest drive device 4. Figures 2 to 6 The second linkage member 1512 allows the first linkage member 1511 and the second linkage member 1512 to pivot around the first pivot portion located at the constraint end 1511-1 of the first linkage member 1511 and the second pivot portion located at the constraint end 1512-1 of the second linkage member 1512, respectively. This, in turn, causes the movable end 1511-2 of the first linkage member 1511 and the movable end 1512-2 of the second linkage member 1512 to move or swing, which in turn causes the third linkage member 1513 to move or swing. Figures 3 to 6 It can be seen that the first linkage mechanism 151 has different pivot positions and the seat back 3 has different positions.

[0078] In this embodiment, the bottom end of the seat back 3 can be pivotally connected to the third foot 1513-3 of the third linkage 1513. On the one hand, this allows the seat back 3 to move or swing in response to the movement or swinging of the third foot 1513-3 of the third linkage 1513 of the first linkage mechanism 151. On the other hand, this also allows the seat back 3 to pivot relative to the first linkage mechanism 151 (more specifically, its third linkage 1513) around a third pivot portion disposed at the third foot 1513-3 of the third linkage 1513. The pivoting of the seat back 3 relative to the first linkage mechanism 151 around the third pivot portion can be driven by a second backrest drive device (e.g., a motor and / or an adjuster). Therefore, the seat back 3 of the seat assembly 1 according to this disclosure can be referred to as a "dual-drive" seat back. In addition, in some embodiments, when the first backrest drive device and the second backrest drive device are not working, the pivoting of the first linkage mechanism 151 around the first pivot portion and the second pivot portion and the pivoting of the seat back 3 around the third pivot portion can be locked, so that the seat back 3 cannot move.

[0079] Continue to refer to Figure 2In embodiments according to this disclosure, the first backrest drive device 4 may include a restrained end 4-1 and a movable end 4-2. The restrained end 4-1 of the first backrest drive device 4 may also be pivotally mounted, for example directly or indirectly (e.g., via an intermediate component, such as the base assembly mentioned below), on a vehicle floor, a slide rail, or a rotating component. The first backrest drive device 4 is pivotable about a fourth pivot portion disposed at its restrained end 4-1. The movable end 4-2 of the first backrest drive device 4 may be pivotally connected to a first or second linkage member that it drives as an active linkage member. The first backrest drive device 4 may be configured to drive and pivot the corresponding first linkage member 1511 or second linkage member 1512 as an active linkage member by changing the distance between its restrained end 4-1 and movable end 4-2, thereby adjusting the posture of the first linkage mechanism 151 and thus adjusting the seat backrest 3. For example, in Figures 2 to 6 In the illustrated embodiment, the first backrest drive device 4 can be configured with a second linkage member 1512 for driving the first linkage mechanism 151. Thus, the second linkage member 1512 acts as the driving member, and its pivoting can drive the first linkage mechanism 151, which is a "four-bar" linkage mechanism, to pivot accordingly and change its posture. Alternatively, for example... Figures 20 to 23 , Figures 26 to 29 as well as Figures 34 to 40 As shown, the first linkage member 1511 of the first linkage mechanism 151 can be used as the active member, and the first backrest drive device 4 can be configured to drive the first linkage member 1511. Thus, the first linkage mechanism 151, which is a "four-bar" linkage mechanism, can be pivoted and its posture changed by the pivoting of the first linkage member 1511.

[0080] In some embodiments, the first linkage mechanism 151 may include two first linkage members 1511, two second linkage members 1512, and two third linkage members 1513, which are respectively disposed on the left and right sides of the seat assembly 1. The two first linkage members 1511 or the two second linkage members 1512 may be configured to move synchronously under the drive of the same backrest drive device 4.

[0081] The second linkage mechanism 152 of the seat assembly 1 can have a variety of configurations.

[0082] In some embodiments according to this disclosure, the second linkage mechanism 152 may include at least one constrained end and at least one movable end. At least one constrained end of the second linkage mechanism 152 may also be (directly or indirectly) pivotally mounted on a vehicle floor (e.g., a vehicle floor base plate), or pivotally mounted on a slide rail capable of sliding relative to the vehicle floor to move the seat assembly 1, or pivotally mounted on a rotating component capable of rotating relative to the vehicle floor to rotate the seat assembly 1 about a vertical direction. The second linkage mechanism 152 may pivot about a pivot portion located at its respective constrained end under the drive of one or more cushion drive devices (e.g., motors and / or adjusters), thereby causing the movable end of the second linkage mechanism 152 to move or oscillate. The seat cushion 2 may be pivotally connected to the at least one movable end of the second linkage mechanism 152 to move or oscillate accordingly following the movement or oscillation of the movable end of the second linkage mechanism 152. In some embodiments, when a corresponding seat drive in one or more seat drive devices is not in operation, the pivoting of the second linkage mechanism 152 about its pivot at its corresponding constraint end can be locked, so that the seat cushion 2 can move in a restricted manner or cannot move.

[0083] In some embodiments, the constraint end of the first linkage mechanism 151 for the seat backrest 3 and the constraint end of the second linkage mechanism 152 for the seat cushion 2 can be mounted on the same component, for example, both mounted on the vehicle floor, a slide rail, or a rotating component. In other embodiments, the constraint end of the first linkage mechanism 151 for the seat backrest 3 and the constraint end of the second linkage mechanism 152 for the seat cushion 2 can be mounted on different components, for example, mounted on two separate components.

[0084] In the seat assembly 1 according to this disclosure, the bottom end of the seat back 3 and the first linkage mechanism 151 for the seat back 3 are not mounted on the seat cushion 2, and the first linkage mechanism 151 for the seat back 3 and the second linkage mechanism 152 for the seat cushion 2 can be driven independently relative to each other. This configuration enables independent control of the movement of both the seat back 3 and the seat cushion 2. This independent control, combined with the aforementioned "dual drive" of the seat back, gives the seat assembly 1 according to this disclosure more flexible adjustment capabilities. This more flexible adjustment capability not only improves the comfort of the seat assembly 1 according to this disclosure but also expands the application scenarios of the seat assembly 1 according to this disclosure, which will be described in detail below.

[0085] In some embodiments, such as Figure 3As can be most clearly seen, the second linkage 152 can be configured as a "four-bar" linkage mechanism. The second linkage 152 may include a first linkage 1521 and a second linkage 1522. The first linkage 1521 includes a restrained end 1521-1 and a movable end 1521-2. The second linkage 1522 includes a restrained end 1522-1 and a movable end 1522-2. The restrained end 1521-1 of the first linkage 1521 and the restrained end 1522-1 of the second linkage 1522 may, for example, be directly or indirectly (e.g., via an intermediate component, such as the base assembly mentioned below) pivotally mounted on the vehicle floor, or pivotally mounted on a slide rail that can slide relative to the vehicle floor to move the seat assembly 1, or pivotally mounted on a rotating component that can rotate relative to the vehicle floor to rotate the seat assembly 1 about a vertical direction. The seat cushion 2 of seat assembly 1, at one end 21 near the seat back 3, can be pivotally connected to the movable end 1521-2 of the first linkage 1521, while the other end 22 away from the seat back 3 can be pivotally connected to the movable end 1522-2 of the second linkage 1522. Thus, in such an embodiment, the first linkage 1521 and the second linkage 1522 of the second linkage mechanism 152, the seat cushion 2, and the components (vehicle floor, slide rail, or rotating component) on which the constraint ends 1521-1 of the first linkage 1521 and 1522-1 of the second linkage 1522 are mounted can constitute a so-called "four-bar" linkage mechanism.

[0086] Here, the first linkage 1521 or the second linkage 1522 of the second linkage mechanism 152 can be configured to pivot around the pivot portion located at the constraint end of the corresponding first linkage 1521 or second linkage 1522 of the second linkage mechanism 152 under the drive of the cushion drive device, thereby adjusting the posture of the second linkage mechanism 152 and thus adjusting the seat cushion 2. For example, the cushion drive device can be configured to drive the first linkage 1521 of the second linkage mechanism 152, thereby making the first linkage 1521 the driving member, and the pivoting of the first linkage 1521 can drive the second linkage mechanism 152, which is a "four-bar" linkage mechanism, to pivot accordingly and change its posture. Alternatively, the second linkage 1522 can also be made the driving member, and the cushion drive device can be configured to drive the second linkage 1522, which can drive the second linkage mechanism 152, which is a "four-bar" linkage mechanism, to pivot accordingly and change its posture.

[0087] In some embodiments, the second linkage mechanism 152 may include two first linkage members 1521 and two second linkage members 1522, which may be respectively disposed on the left and right sides of the seat assembly 1. The two first linkage members 1521 or the two second linkage members 1522 may move synchronously under the drive of the same drive device, for example, by means of two angle adjusters connected to each other, and driven synchronously by a single motor.

[0088] As has been explained in detail above, in Figures 2 to 6 In the illustrated embodiment, the seat assembly 1 may include a first linkage 151 configured as a four-bar linkage and a second linkage 152 configured as a four-bar linkage. Such a seat assembly 1 may be, for example, in a designed location (see...) Figure 2 ), lying flat position (see Figure 3 ), folding position (see Figure 4 ), easy access to location ( Figure 5 ) and high-profile position ( Figure 6 Move between ).

[0089] In the design location, such as Figure 2 As shown, the seat back 3 of the seat assembly 1 can be at a predetermined angle relative to the seat cushion 2 to support the occupant.

[0090] In a lying position, such as Figure 3 As shown, the seat back 3 of the seat assembly 1 can be substantially flush with the seat cushion 2, allowing the occupant to lie down on the seat assembly 1. To move the seat assembly 1 from its designed position to a reclining position, the first backrest drive device 4 can be used to drive one of the first linkage member 1511 and the second linkage member 1512 (here, the second linkage member 1512) of the first linkage mechanism 151 to pivot away from the seat cushion 2. After pivoting at a predetermined angle, the second backrest drive device can be used to drive the seat back 3 to pivot away from the seat cushion 2 relative to the third linkage member 1513 of the first linkage mechanism 151 until it is substantially flush with the seat cushion 2. Alternatively, the seat cushion drive device can be used to drive the first linkage member 1521 or the second linkage member 1522 of the second linkage mechanism 152 to pivot away from the seat back 3 (i.e., forward), so that the seat cushion 2 and the seat back 3 are substantially unfolded onto the same plane or at the same height. With the help of independently controlled first linkage mechanism 151 and second linkage mechanism 152, the seat assembly 1 according to this disclosure is more comfortable in the lying position because there is basically no height difference at the joint between the seat back 3 and the seat cushion 2, thus avoiding the common problem of the occupant's lower back being pressed against the seat.

[0091] In the folded position, such as Figure 4As shown, the seat back 3 and seat cushion 2 of seat assembly 1 are substantially stacked to increase the space of the motor vehicle (e.g., cargo space). To move seat assembly 1 from its designed position to its folded position, on the one hand, the first linkage 1521 or the second linkage 1522 of the second linkage mechanism 152 can be pivoted away from the seat back 3 (i.e., forward and downward) using, for example, a seat cushion drive device; on the other hand, the seat back 3 can be pivoted toward the seat cushion 2 using the second backrest drive device until it is substantially stacked with the seat cushion 2. In some cases, before folding the seat back 3, one of the first linkage 1511 and the second linkage 1512 of the first linkage mechanism 151 (here, the second linkage 1512) can be pivoted toward the seat cushion 2 (i.e., forward) using the first backrest drive device 4, thereby raising the seat back 3 to facilitate folding.

[0092] Here, the folding is more flexible because the movement of the seat cushion 2 and the seat back 3 can be controlled independently (e.g., controlled independently by a controller with a predetermined control program). In other cases, the first backrest drive device 4 can also be used to drive one of the linkage 1511 and the second linkage 1512 (here, the second linkage 1512) of the first linkage mechanism 151 to pivot away from the seat cushion 2 (i.e., backward). This pivoting method allows the folded seat back 3 to be in a lower position, thereby freeing up more cargo space.

[0093] In easily accessible locations, such as Figure 5 As shown, on the one hand, the seat cushion 2 of the seat assembly 1 can pivot forward a certain distance relative to the designed position; on the other hand, the seat back 3 of the seat assembly 1 can pivot towards the seat cushion 2 at a predetermined angle relative to the designed position, thereby providing more space behind the seat assembly 1 to facilitate the entry and exit of the occupant. In order to move the seat assembly 1 from the designed position to the convenient entry position, on the one hand, the seat cushion driving device can be used to drive the first linkage member 1521 or the second linkage member 1522 of the second linkage mechanism 152 to pivot away from the seat back 3 (i.e., forward); on the other hand, the first backrest driving device 4 can be used to drive one of the first linkage member 1511 and the second linkage member 1512 of the first linkage mechanism 151 (here, the second linkage member 1512) to pivot towards the seat cushion 2, thereby causing the seat back 3 to move forward towards the seat cushion 2. In some cases, after one of the first linkage member 1511 and the second linkage member 1512 of the first linkage mechanism 151 has pivoted toward the seat cushion 2 by a predetermined angle, the second backrest drive device can be used to drive the seat back 3 to continue to pivot toward the seat cushion 2 relative to the third linkage member 1513 until it pivots to the desired position.

[0094] Here, by means of the independently controlled first linkage mechanism 151, the seat assembly 1 according to this disclosure can free up more space for convenient entry and exit. Furthermore, if the first linkage mechanism 151 and the second linkage mechanism 152 of the seat assembly 1 are mounted on the slide rail 8, a slide rail drive device 9 (see, for example, see...) can also be used. Figure 13 This drives the entire seat assembly 1 to slide forward, thereby further increasing the space for easy entry and exit.

[0095] In a high-profile (height adjusted) position, such as Figure 6 As shown, the seat cushion 2 of the seat assembly 1 can be raised or lowered by a predetermined height relative to the designed position. To move the seat assembly 1 from the designed position to the raised position, the first linkage 1521 or the second linkage 1522 of the second linkage mechanism 152 can be driven by the seat cushion drive device to pivot away from the seat back 3, causing the seat cushion 2 to move forward and upward, thereby raising the seat cushion 2 of the seat assembly 1; or the first linkage 1521 or the second linkage 1522 of the second linkage mechanism 152 can be driven to pivot towards the seat back 3, thereby lowering the seat cushion 2 of the seat assembly 1. In addition, during or after the process of pivoting the first linkage 1521 or the second linkage 152 of the second linkage mechanism 152 away from the seat back 3 using the seat cushion drive device, the first backrest drive device 4 can also be used to drive one of the first linkage 1511 and the second linkage 1512 of the first linkage mechanism 151 (here, the second linkage 1512) to pivot toward or away from the seat cushion 2 (i.e., forward or backward) so that the seat back 3 is raised or lowered accordingly, and / or the second backrest drive device can be used to drive the seat back 3 to pivot toward or away from the seat cushion 2 relative to the third linkage 1513 of the first linkage mechanism 151 (i.e., forward or backward), so that the seat back 3 and the seat cushion 2 can still be adjusted to a predetermined position and a predetermined angle relative to each other in the high position, thereby increasing the comfort of the seat assembly 1.

[0096] The following will refer to Figures 7 to 16 The specific structure of a seat assembly 1 according to one embodiment of the present disclosure is described in detail. Figures 7 to 16 The seat assembly 1 shown may have substantially corresponding to Figures 2 to 6 The configuration of the linkage mechanism 150 shown.

[0097] As mentioned above, seat assembly 1 may include seat cushion 2 and seat back 3. Figure 7 As shown, the seat back 3 may include a backrest frame 31. The backrest frame 31 may be configured to be generally rectangular. Two third linkage members 1513 of the first linkage mechanism 151 may be pivotally mounted at the bottom end of the backrest frame 31 via their third legs 1513-3. In some embodiments, such as Figure 7 and Figure 8 As shown, the second backrest drive device 5 for driving the seat backrest 3 mentioned above may include a motor 51 and an adjuster 52. The motor 51 can be mounted on the backrest frame 31 using fasteners (e.g., bolts). The adjuster 52 may include a fixed component and a rotating component capable of rotating relative to the fixed component. The fixed component of the adjuster 52 may be fixedly connected (e.g., welded) to a third linkage 1513, while the rotating component of the adjuster 52 may be fixedly connected (e.g., welded) to a corresponding part of the backrest frame 31. Thus, when the rotating component of the adjuster 52 rotates relative to the fixed component, it can drive the backrest frame 31 to pivot relative to the third linkage 1513. The rotation of the rotating component of the adjuster 52 relative to the fixed component is driven by the motor 51. In this embodiment, the third linkage 1513 may be configured as a triangular connecting plate for fixing the fixed component of the adjuster 52. Additionally, as... Figure 7 As shown, the second backrest drive device may include a single motor 51 and two adjusters 52. The two adjusters 52 are respectively mounted on both sides of the backrest frame 31 for driving the backrest frame 31 to pivot from the left and right sides. To synchronously drive the two adjusters 52 using the single motor 51, the two adjusters 52 can be connected to each other using a rod 53. The motor 51 can drive the rotating parts of the two adjusters 52 to rotate synchronously by rotating the rod 53. Figure 7 The image shows the assembled backrest assembly 30.

[0098] like Figures 9 to 12 As shown, the seat cushion 2 may include a seat cushion frame 21. The seat cushion frame 21 may be configured in a generally rectangular shape and may include two side connectors (e.g., side panels) 21-1 located on the left and right sides, a front connector 21-2 (e.g., a front crossbar or front cross tube) for connecting the two side connectors at the front, and a rear connector 21-3 (e.g., a rear cross tube) for connecting the two side connectors at the rear. The seat cushion frame 21 may also include a seat basin 21-4, which may be supported on the two side connectors 21-1 and the front connector 21-2 at the front of the two side connectors. In some embodiments, the seat cushion frame 21 may also include a leg rest mounting bracket for mounting a leg rest.

[0099] The first linkage member 1521 (or rear linkage member of the seat cushion) of the second linkage mechanism 152 mentioned above can be mounted on the rear of the two side connectors 21-1 on the left and right sides of the seat cushion frame 21. The rear connector 21-3 can be rotatably connected to the two side connectors 21-1, while the first linkage member 1521 can be fixedly connected (e.g., welded) to the rear connector 21-3 (e.g., the rear cross tube). The seat cushion 2 may include a seat cushion drive device for driving the first linkage member 1521 to pivot about the first pivot portion. Figure 9 and Figure 12 As shown, the seat cushion drive unit may include a motor 21-6. The motor 21-6 can be mounted on the side connector 21-1 via a seat cushion motor mounting plate 21-7 located outside the side connector 21-1 and a seat cushion motor mounting bracket 21-8 located inside the side connector 21-1. The motor 21-6 can be mounted using fasteners (e.g., bolts). Figure 10 and Figure 11 As shown, the first linkage 1521 may be constructed with teeth, and the motor 21-6 may drive the first linkage 1521, for example, via a gear that meshes with the teeth of the first linkage 1521. Alternatively, as shown in the figure, the motor 21-6 may also drive the first linkage 1521 via an angle adjuster.

[0100] Reference Figures 9 to 11 The second linkage 1522 (or the front linkage of the seat cushion) of the second linkage mechanism 152 can be pivotally mounted on the front of the seat cushion frame 21. The second linkage mechanism 152 may include two second linkages 1522, which can be pivotally connected to a side connector 21-1 respectively. The two side connectors 21-1 can be fixedly connected (e.g., welded) to the front connector 21-2 (e.g., the front cross tube or front cross bar) and, if necessary, to the seat basin 21-4. Figure 9 The image shows the assembled seat cushion assembly 40.

[0101] Reference Figure 13 and Figure 14 The seat assembly 1 may also include a base assembly 7. A first linkage member 1511 and a second linkage member 1512 for the first linkage mechanism 151 of the seat back 3, and a first backrest drive device 4 for pivoting at least one of the first linkage member 1511 and the second linkage member 1512 (here, the second linkage member 1512) of the first linkage mechanism 151 may be mounted on the base assembly 7. Specifically, as Figure 14 As shown, the first linkage member 1511 (more specifically, its constraint end 1511-1) of the first linkage mechanism 151 can be pivotally mounted to the base assembly 7, while the second linkage member 1512 (more specifically, its constraint end 1512-1) can be pivotally connected to the base assembly 7 via a corresponding pivot 1516. Here, the pivot 1516 can be pivotally connected to the base assembly 7, while the second linkage member 1512 can be fixedly connected to the pivot 1516.

[0102] Continue to refer to Figure 14The first backrest drive device 4 may include a motor 35, a lead screw 36, and a nut slider 39. The motor 35 may be configured to drive the nut slider 39 relative to the motor 35 via the lead screw 36. The motor 35 and the nut slider 39 may respectively form one of the constrained end and the movable end of the first backrest drive device 4. The motor 35 may be pivotally connected, for example, to one of the second linkage 1512 and the base assembly 7, while the nut slider 39 may be pivotally connected to the other of the second linkage 1512 and the base assembly 7. Figure 14 In the illustrated embodiment, the motor 35 can be mounted on the base assembly 7 via a lead screw motor cross tube 37 and a lead screw motor bracket 38. The lead screw motor cross tube 37 can be fixedly connected (e.g., welded) to the base assembly 7, and the lead screw motor cross tube 37 and the lead screw motor bracket 38 can be fixedly connected (e.g., welded) to each other, while the motor 35 can be pivotally connected to the lead screw motor bracket 38. The nut slider 39 can be pivotally connected to the second linkage 1512. Thus, the restrained end of the first backrest drive device 4 is located on one side of the motor 35, while its movable end is located on one side of the nut slider 39. The second linkage 1512 can be fixedly connected to the rotating shaft 1516, which is pivotally mounted on the base assembly 7. The movement of the nut slider 39 along the lead screw 36 relative to the motor 35 can drive the second linkage 1512 to rotate around the pivot axis where the rotating shaft 1516 is located. The rotation of the second linkage 1512 then drives the first linkage 1511 and the third linkage 1513 to move or pivot, thereby driving the seat back 3 to move. Figure 13 The assembled base assembly 50 is shown. Alternatively, in some other embodiments not shown, the first backrest device may include a motor and a lead screw driven to the motor (e.g., via a worm gear), such that the lead screw itself is movable relative to the motor. The motor 35 and the lead screw 36 may respectively form one of the constrained end and the movable end of the first backrest drive device 4. In this embodiment, the motor may be pivotally connected, for example, to one of the second linkage 1512 and the base assembly 7, while the lead screw may be pivotally connected to the other of the second linkage 1512 and the base assembly 7.

[0103] Figure 15 Show Figure 9 The seat cushion assembly 40 shown is... Figure 13 The connection between the base assemblies 50 shown. The constraint end 1521-1 of the first linkage member 1521 of the second linkage mechanism 152 mounted on the cushion frame 21 can be pivotally mounted on the base assembly 7, and the constraint end 1522-1 of the second linkage member 1522 of the second linkage mechanism 152 can be pivotally mounted on the base assembly 7. Figure 16 Show Figure 7 The backrest assembly 30 shown is... Figure 13The connection between the base assemblies 50 shown. The movable end 1511-2 of the first linkage member 1511 and the movable end 1512-2 of the second linkage member 1512 mounted on the base assembly 7 can be connected to the base assembly 7. Figure 7 The first foot 1513-1 and the second foot 1513-2 of the third linkage member 1513 of the first linkage mechanism 151 on the backrest frame 31 shown are pivotally connected to each other. The seat assembly 1 is formed after the backrest assembly 30 and the seat cushion assembly 40 are assembled with the base assembly 50, for example, in the manner described above.

[0104] exist Figures 2 to 6 as well as Figures 13 to 16 In the illustrated embodiment, the second linkage 1512 may have a generally triangular or bent shape, with its constrained end 1512-1, movable end 1512-2, and connection portion with the first backrest drive device 4 forming a triangle. In other words, as shown... Figures 2 to 6 As can be most clearly seen from the schematic diagram, the movable end 4-2 of the first backrest drive device 4 can be pivotally connected to the second linkage 1512 it drives to form a pivot drive unit 6. The pivot drive unit 6 is located outside the line connecting the restrained end 1512-1 and the movable end 1512-2 of the second linkage 1512. Furthermore, in such an embodiment, as... Figure 14 As can be most clearly seen, the constraint end 4-1 of the first backrest drive device 4, or its motor 35, is located before the constraint end of the corresponding (driven) second linkage 1512. Here, the front corresponds to... Figures 2 to 6 To the right, and behind corresponding to Figures 2 to 6 To the left. As shown in seat assembly 1... Figure 2 Taking the design position shown as an example, in this position, the seat cushion 2 is in front (i.e., on the right) and the seat back 3 is behind (i.e., on the left). When the nut slider 39 moves toward the motor 35, shortening the distance between the restrained end 4-1 and the movable end 4-2 of the first backrest drive device 4, the second linkage 1512 moves forward (i.e., in...). Figures 2 to 6 (From center to right) pivot. Conversely, when the nut slider 39 moves away from the motor 35, increasing the distance between the restrained end 4-1 and the movable end 4-2 of the first backrest drive device 4, the second linkage 1512 moves backward (i.e., in...). Figures 2 to 6 (From center to left) pivot.

[0105] Figures 17 to 23 The following are schematic diagrams based on: Figure 2 A schematic diagram of a modified linkage mechanism for the seat assembly. Figure 2 The linkage mechanism 150 is similar to that in the middle. Figures 17 to 23In the illustrated embodiment, both the first linkage mechanism 151 and the second linkage mechanism 152 are constructed as "four-bar" linkage mechanisms. The difference lies in the arrangement of the first backrest drive device 4 and the connection between the first backrest drive device 4 and the first linkage member 1511 or the second linkage member 1512 that it drives as the active linkage member.

[0106] In some embodiments, the pivot drive portion 6 formed by the movable end 4-2 of the first backrest drive device 4 and the first linkage member 1511 or the second linkage member 1512 that it drives as an active linkage member can be located outside the line connecting the constraint end and the movable end of the corresponding first linkage member 1511 or the second linkage member 1512. Figure 21 and Figure 23 In the accompanying drawings, reference numeral 1511-3 is used to denote the line 1511-3 connecting the constraint end 1511-1 of the first linkage 1511 and its pivot drive part 6. Figure 2 and Figure 19 In the accompanying drawings, reference numeral 1512-3 is used to denote the line 1512-3 connecting the constraint end 1512-1 of the second linkage 1512 to its pivot drive 6. In some embodiments, the connecting lines 1511-3 and 1512-3 may form an angle of 15° to 165°, for example 30° to 150°, for example 90° or 120° with the line connecting the constraint end and movable end of the corresponding first linkage 1511 or second linkage 1512. The length and corresponding angle of the connecting lines 1511-3 and 1512-3 (and thus the position of the pivot drive 6) can be selected according to actual needs.

[0107] It is understood that the line segments drawn in the schematic diagrams can be virtual, used only to illustrate the principle of the linkage mechanism 150 of the seat assembly, and not to define the actual geometry of the corresponding components. In particular, the positional relationships of the various constraint ends, movable ends, connecting lines, and pivot drive parts are described with reference to a plane perpendicular to each pivot axis. The constraint ends, movable ends, and corresponding pivot drive parts of each actual component are projected onto this plane, and the connecting lines are therefore located in this plane.

[0108] In some embodiments, see, for example Figure 17 , Figure 18 , Figure 20 and Figure 22 The pivot drive portion 6 formed by the movable end 4-2 of the first backrest drive device 4 and the first linkage member 1511 or the second linkage member 1512 it drives as an active linkage member can be located between the constraint end and the movable end of the corresponding first linkage member 1511 or the second linkage member 1512. The position of the connection portion (pivot drive portion 6) between the movable end 4-2 of the first backrest drive device 4 and the first linkage member 1511 or the second linkage member 1512 it drives can also be selected according to actual needs.

[0109] In some embodiments, see, for example Figure 2 , Figure 17 , Figure 20 and Figure 21 The constraint end 4-1 of the first backrest drive device 4 can be located in front of the constraint end of the first linkage 1511 or the second linkage 1512 that it drives as an active linkage. In particular, the motor of the first backrest drive device 4 can be located substantially in front of the first linkage 1511 or the second linkage 1512 that it drives. The first backrest drive device 4 and the first linkage 1511 or the second linkage 1512 that it drives can be designed such that when the distance between the constraint end 4-1 and the movable end 4-2 of the first backrest drive device 4 is shortened, the corresponding first linkage 1511 or the second linkage 1512 pivots forward (or toward the seat cushion 2).

[0110] In some embodiments, see, for example Figure 18 , Figure 19 , Figure 22 and Figure 23 The constraint end 4-1 of the first backrest drive device 4 can be located after the constraint end of the first linkage 1511 or the second linkage 1512 it drives, which is the active linkage. In particular, the motor of the first backrest drive device 4 can be located substantially after the first linkage 1511 or the second linkage 1512 it drives. The first backrest drive device 4 and the first linkage 1511 or the second linkage 1512 it drives can be designed such that when the distance between the constraint end 4-1 and the movable end 4-2 of the first backrest drive device 4 is shortened, the corresponding first linkage 1511 or the second linkage 1512 pivots backward (or away from the seat cushion 2).

[0111] Specifically, in Figure 17 In the illustrated embodiment, the first backrest drive device 4 is configured to drive the second linkage 1512. The pivot drive unit 6 is located between the restrained end 1512-1 and the movable end 1512-2 of the second linkage 1512, and the restrained end 4-1 of the first backrest drive device 4 is located in front of the restrained end 1512-1 of the second linkage 1512. Here, the first backrest drive device 4 can be substantially located in front of the second linkage 1512.

[0112] exist Figure 18In the illustrated embodiment, the first backrest drive device 4 is configured to drive the second linkage 1512. The pivot drive unit 6 is located between the restrained end 1512-1 and the movable end 1512-2 of the second linkage 1512, and the restrained end 4-1 of the first backrest drive device 4 is located after the restrained end 1512-1 of the second linkage 1512. Here, the first backrest drive device 4 can be substantially located after the second linkage 1512.

[0113] exist Figure 19 In the illustrated embodiment, the first backrest drive device 4 is configured to drive the second linkage 1512. The pivot drive unit 6 is located outside the line connecting the constrained end 1512-1 and the movable end 1512-2 of the second linkage 1512, and the constrained end 4-1 of the first backrest drive device 4 is located after the constrained end 1512-1 of the second linkage 1512. Here, the first backrest drive device 4 can be substantially located after the second linkage 1512.

[0114] exist Figure 20 In the illustrated embodiment, the first backrest drive device 4 is configured to drive the first linkage 1511. The pivot drive unit 6 is located between the restrained end 1511-1 and the movable end 1511-2 of the first linkage 1511, and the restrained end 4-1 of the first backrest drive device 4 is located in front of the restrained end 1511-1 of the first linkage 1511. Here, the first backrest drive device 4 can be substantially located in front of the first linkage 1511.

[0115] exist Figure 21 In the illustrated embodiment, the first backrest drive device 4 is configured to drive the first linkage 1511. The pivot drive unit 6 is located outside the line connecting the constrained end 1511-1 and the movable end 1511-2 of the first linkage 1511, and the constrained end 4-1 of the first backrest drive device 4 is located in front of the constrained end 1511-1 of the first linkage 1511. Here, the first backrest drive device 4 can be substantially located in front of the first linkage 1511.

[0116] exist Figure 22 In the illustrated embodiment, the first backrest drive device 4 is configured to drive the first linkage 1511. The pivot drive unit 6 is located between the restrained end 1511-1 and the movable end 1511-2 of the first linkage 1511, and the restrained end 4-1 of the first backrest drive device 4 is located after the restrained end 1511-1 of the first linkage 1511. Here, the first backrest drive device 4 can be substantially located after the first linkage 1511.

[0117] exist Figure 23In the illustrated embodiment, the first backrest drive device 4 is configured to drive the first linkage 1511. The pivot drive unit 6 is located outside the line connecting the constrained end 1511-1 and the movable end 1511-2 of the first linkage 1511, and the constrained end 4-1 of the first backrest drive device 4 is located after the constrained end 1511-1 of the first linkage 1511. Here, the first backrest drive device 4 can be substantially located after the first linkage 1511.

[0118] Figures 24 to 29 Schematic diagrams of the linkage mechanism 150 of a seat assembly according to some embodiments of the present disclosure are shown respectively. Figures 24 to 29 In the embodiments, the first linkage mechanism 151 can be constructed as a "four-bar linkage" mechanism, which can have respectively with Figures 18 to 23 The corresponding configurations in the embodiments shown are not described in detail here for the purpose of simplification.

[0119] exist Figures 24 to 29 In some embodiments, the second linkage mechanism 152 can be configured as a "five-bar" linkage mechanism. For example... Figure 24As shown, the second linkage mechanism 152 may include a first linkage 1521 (also referred to as a "rear seat linkage," located at the rear of the seat cushion 2 near the seat back 3), a second linkage 1522 (also referred to as a "front seat linkage," located at the front of the seat cushion 2 away from the seat back 3), and a third linkage 1523 (also referred to as a "zero-gravity linkage," used to adjust the seat assembly 1 to a zero-gravity position). The first linkage 1521 includes a restrained end 1521-1 and a movable end 1521-2, the second linkage includes a first movable end 1522-1 and a second movable end 1522-2, and the third linkage includes a restrained end 1523-1 and a movable end 1523-2. The constraint end 1521-1 of the first linkage 1521 and the constraint end 1523-1 of the third linkage 1523 can be pivotally mounted on the vehicle floor, or pivotally mounted on a slide rail that can slide relative to the vehicle floor to move the seat assembly 1, or pivotally mounted on a rotating component that can rotate relative to the vehicle floor to rotate the seat assembly 1 about the vertical direction. The constraint ends 1521-1 and 1523-1 can also be pivotally mounted on the vehicle floor, on a slide rail, or on a rotating component via an intermediate component, such as the base assembly mentioned below. The end of the seat cushion 2 of the seat assembly 1 near the seat back 3 (also referred to as the "rear end") is pivotally connected to the movable end 1521-2 of the first linkage 1521, while the other end away from the seat back 3 (also referred to as the "front end") is pivotally connected to the first movable end 1522-1 of the second linkage 1522. The second movable end 1522-2 of the second linkage 1522 is pivotally connected to the movable end 1523-2 of the third linkage 1523. Thus, the first linkage 1521, the second linkage 1522 and the third linkage 1523 of the second linkage mechanism 152, the seat cushion 2, and the components (vehicle floor, slide rail or rotating component) on which the constraint ends 1521-1 of the first linkage 1521 and 1523-1 of the third linkage 1523 are mounted constitute a so-called "five-bar linkage" mechanism.

[0120] The first linkage 1521 can pivot about a first pivot portion located at the constraint end 1521-1 under the drive of a first seat cushion drive device (e.g., a motor and / or an adjuster). The third linkage 1523 can pivot about a second pivot portion located at the constraint end 1523-1 under the drive of a second seat cushion drive device (e.g., a motor and / or an adjuster). The pivoting of the first linkage 1521 about the first pivot portion located at the constraint end 1521-1 and the pivoting of the third linkage 1523 about the second pivot portion located at the constraint end 1523-1 both enable the seat cushion 2 to move or swing accordingly, thereby moving the seat cushion 2 to the desired position. When the first and / or second seat cushion drive devices are not in operation, the pivoting of the first linkage 1521 around the first pivot portion located at the constraint end 1521-1 and / or the pivoting of the third linkage 1523 around the second pivot portion located at the constraint end 1523-1 can be locked, allowing the seat cushion 2 to move with restriction or remain immobile. In some cases, when the first seat cushion drive device is not in operation, the movable end 1521-2 of the first linkage 1521 can also be locked using the first seat cushion drive device, preventing the seat cushion 2 from pivoting around the movable end 1521-2 of the first linkage 1521, but allowing the first linkage 1521 to still pivot around its constraint end 1521-1.

[0121] In the illustrated embodiment, as mentioned above, the third linkage 1523 is configured as a zero-gravity linkage for achieving the zero-gravity position of the seat assembly 1. However, this disclosure is not limited thereto, and the second linkage 1522 may also be configured as a zero-gravity linkage for achieving the zero-gravity position of the seat assembly 1.

[0122] Similar to the first linkage mechanism 151, the second linkage mechanism 152 may include two first linkage members 1521, two second linkage members 1522, and two third linkage members 1523, which are respectively disposed on the left and right sides of the seat assembly 1. The two first linkage members 1521, the two second linkage members 1522, or the two third linkage members 1523 can move synchronously under the drive of the same drive device, for example, by means of two angle adjusters connected to each other, driven synchronously by a single motor.

[0123] exist Figures 24 to 29 In one embodiment, the seat assembly 1 can move between a design position, a high-profile position, a zero-gravity position, a folded position, a convenient entry position, and a reclining position by means of the linkage mechanism 150.

[0124] In the designed position, the seat back 3 of the seat assembly 1 is at a predetermined angle relative to the seat cushion 2 to support the occupant.

[0125] In the zero-gravity position, seat assembly 1 is adjusted to a designed zero-pressure state (e.g., seat cushion 2 and seat back 3 are adjusted to a predetermined angle and relative position, the footrest of seat cushion 2 is extended and in a predetermined position, etc.). In order to move seat assembly 1 from the designed position to the zero-gravity position, the zero-gravity linkage (third linkage 1523 or second linkage 1522) can be driven by the second seat cushion drive device to pivot toward the seat back 3 (i.e., backward and upward). In this process, the first seat cushion drive device can be used to lock the constraint end 1521-1 of the first linkage 1521, so that the first linkage 1521 cannot move, while only the second linkage 1522, the third linkage 1523 and the seat cushion 2 can move; or the first seat cushion drive device can be used to lock the movable end 1521-2 of the first linkage 1521, so that the seat cushion 2 cannot pivot relative to the movable end 1521-2 of the first linkage 1521, but the first linkage 1521 can still pivot around its constraint end 1521-1. In addition, during the process of moving the seat assembly 1 from the designed position to the zero-gravity position, the first backrest drive device can be used to drive one of the first linkage member 1511 and the second linkage member 1512 of the first linkage mechanism 151 to pivot away from the seat cushion 2 (i.e., backward), and the second backrest drive device can be used to drive the seat back 3 to pivot away from or closer to the seat cushion 2 relative to the third linkage member 1513 of the first linkage mechanism 151, until the seat back 3 is pivoted to the desired position.

[0126] The process of moving seat assembly 1 from the designed position to the high-adjustment position, folded position, easy access position, and reclined position is essentially the same as the process described for the second linkage mechanism 152 of the "four-bar linkage". For the purpose of simplification, it will not be repeated here. It should be noted that in this embodiment, during the process of moving seat assembly 1 from the designed position to the high-adjustment position, folded position, easy access position, and reclined position, the zero-gravity linkage (e.g., the second linkage 1522 or the third linkage 1523) can be locked using the second seat cushion drive device, preventing the zero-gravity linkage from moving and allowing only the seat cushion 2 and other linkages besides the zero-gravity linkage to move.

[0127] Because in Figures 24 to 29 The “five-bar linkage” second linkage mechanism 152 shown not only contains the first seat cushion drive device, but also the second seat cushion drive device. The first linkage mechanism 151 can be configured such that its backrest drive device 4 is further away from the second linkage mechanism 152, so as to leave enough space in the area of ​​the second linkage area 152 for installing the first seat cushion drive device and the second seat cushion drive device.

[0128] Figures 30 to 37Schematic diagrams of the linkage mechanism 150 of a seat assembly according to some embodiments of the present disclosure are shown respectively. Figures 30 to 37 In the embodiments, the first linkage mechanism 151 can be constructed as a "four-bar linkage" mechanism, which can have respectively with Figure 2 , Figure 17 and Figures 18 to 23 The corresponding configurations in the embodiments shown are not described in detail here for the purpose of simplification.

[0129] exist Figures 30 to 37 In the embodiments, such as Figure 30 As can be most clearly seen, the second linkage mechanism 152 may include a first linkage 1521 and a second linkage 1522. The first linkage 1521 may be configured as a slide plate, which includes a slide groove 1524 extending along the length of the first linkage 1521, and one end of the slide plate may be fixed to the vehicle floor, a slide rail, or a rotating component. The second linkage 1522 includes a restrained end 1522-1 and a movable end 1522-2. The restrained end 1522-1 of the second linkage 1522 may be pivotally mounted on the vehicle floor, a slide rail, or a rotating component. The end of the seat cushion 2 of the seat assembly 1 near the seat back 3 is slidably mounted in the slide groove 1524 of the first linkage 1521 (slide plate), while the other end away from the seat back 3 is pivotally connected to the movable end 1522-2 of the second linkage 1522. If necessary, the seat cushion 2 may include, for example, a segment 23 extending at an angle to the seat surface, the end of which is slidably mounted in a groove 1524 of the first linkage 1521 (slide plate). In this embodiment, the second linkage 1522 of the second linkage mechanism 152 can pivot about a pivot portion located at the constraint end 1522-1 under the drive of a seat cushion drive device (e.g., a motor and / or an adjuster), thereby causing the end of the seat cushion 2 near the seat back 3 to slide in the groove 1524, realizing the movement or swinging of the seat cushion 2.

[0130] exist Figures 30 to 37 In this embodiment, the seat assembly 1 can move between the designed position, the folded position, the easy-access position, and the reclining position by means of the linkage mechanism 150. In this second embodiment, the movement process of the seat assembly 1 from the designed position to other positions is basically the same as the movement process in the previous embodiment, and will not be described again here for the purpose of simplification.

[0131] Figures 38 to 40 Schematic diagrams of the linkage mechanism 150 of a seat assembly according to some embodiments of the present disclosure are shown respectively. Figures 38 to 40 In the embodiments, such as Figure 38As shown, the first backrest drive device 4 of the first linkage mechanism 151 of the seat assembly 1 may include a motor and a rack and pinion mechanism. The motor mechanism causes the rack 43 to move relative to the motor via a gear 42. The motor (or gear 42) and the rack 43 may respectively form one of the constrained end 4-1 and the movable end 4-2 of the first backrest drive device 4. Advantageously, the constrained end 4-1 of the first backrest drive device 4 may be located on one side of the motor (or gear 42), while the movable end 4-2 of the first backrest drive device 4 may be located on one side of the rack 43. Not limited to the embodiment shown in the figures, as mentioned above, the arrangement of the first backrest drive device 4 and the connection points between the first backrest drive device 4 and its driven first linkage 1511 or second linkage 1512 can be varied, and will not be described in detail here for the purpose of simplification.

[0132] Furthermore, the configuration of the first backrest drive device 4 of the first linkage mechanism 151, including a motor and a rack and pinion mechanism, can be arbitrarily combined with various configurations of the second linkage mechanism 152. For example, Figure 38 The second linkage mechanism 152 is constructed as a "four-bar linkage mechanism"; Figure 39 The second linkage mechanism 152 is constructed as a "five-bar linkage mechanism"; Figure 40 The second linkage mechanism 152 is constructed as a linkage mechanism including a slide 1524.

[0133] Figure 41A schematic diagram of a linkage mechanism 150 of a seat assembly according to some embodiments of the present disclosure is shown. Not limited to the first linkage mechanism configured as a "four-bar" linkage mechanism as described above, the first linkage mechanism 151 can also be configured as a "single-bar" linkage mechanism, for example. The first linkage mechanism 151 may include only a single linkage member 1514. The single linkage member 1514 includes a restrained end 1514-1 and a movable end 1514-2. The movable end 4-2 of the first backrest drive device 4 can be pivotally connected to the single linkage member 1514, so that the single linkage member 1514 can be configured as an active linkage member and driven by the first backrest drive device 4, causing the single linkage member 1514 to pivot about a pivot portion provided at its restrained end 1514-1 and drive the movable end 1514-2 of the single linkage member 1514 to move or swing. The bottom end of the seat backrest 3 can be pivotally connected to the movable end 1514-2 of a single linkage 1514. This allows the seat backrest 3 to move or swing in response to the movement or swaying of the movable end 1514-2 of the single linkage 1514 in the first linkage mechanism 151. Furthermore, it allows the seat backrest 3 to pivot relative to the first linkage mechanism 151 (more specifically, the single linkage 1514) around a pivot portion located at the movable end 1514-2 of the single linkage 1514. Similarly, as described above, the pivoting of the seat backrest 3 relative to the first linkage mechanism 151 can be driven by a second backrest drive device (e.g., a motor and / or an adjuster).

[0134] It is understandable that the details described above in conjunction with the first linkage mechanism 151, which is constructed as a "four-bar" linkage mechanism, such as the configuration and arrangement of the first backrest drive device 4, and the various combinations of configurations of the first linkage mechanism 151 and the second linkage mechanism 152, can be applied to the first linkage mechanism 151, which is constructed as a "single-bar" linkage mechanism. For the purpose of simplifying the explanation, they will not be repeated here.

[0135] Exemplary embodiments according to this disclosure have been described above with reference to the accompanying drawings. However, those skilled in the art will understand that various changes and modifications can be made to the exemplary embodiments of this disclosure without departing from the spirit and scope of this disclosure. All changes and modifications are included within the scope of protection of this disclosure as defined by the claims. This disclosure is defined by the appended claims, and equivalents of those claims are also included.

Claims

1. A seat assembly for a motor vehicle, characterized in that, The seat assembly includes: Seat cushion; Seat backrest; First backrest drive device; Second backrest drive mechanism; and A linkage mechanism configured to enable the seat assembly to move between multiple positions; The linkage mechanism includes a first linkage mechanism for the seat back and a second linkage mechanism for the seat cushion, wherein the first linkage mechanism and the second linkage mechanism are configured to be driven independently of each other. The first linkage mechanism includes at least one constraint end and at least one movable end. The first linkage mechanism is capable of pivoting around a pivot portion disposed at the corresponding constraint end of the at least one constraint end of the first linkage mechanism under the drive of the first backrest drive device. Wherein, the bottom end of the seat back near the seat cushion is pivotally connected to a corresponding movable end of at least one movable end of the first linkage mechanism, so that the seat back can pivot relative to the first linkage mechanism around the pivot portion provided at the corresponding movable end of the first linkage mechanism under the drive of the second backrest driving device. The first backrest drive device includes a constrained end and a movable end. The first backrest drive device is pivotable about a pivot portion disposed at the constrained end of the first backrest drive device. The movable end of the first backrest drive device is pivotally connected to the first linkage mechanism. The first backrest drive device is configured to drive the first linkage mechanism by changing the distance between the constrained end and the movable end of the first backrest drive device.

2. The seat assembly for a motor vehicle according to claim 1, characterized in that, The first linkage mechanism includes a single linkage member, which includes a constrained end and a movable end. The movable end of the first backrest drive device is pivotally connected to the single linkage member, which is an active linkage member. The first backrest drive device is configured to drive the single linkage member, which is an active linkage member, to pivot about a pivot portion located at its constrained end. The bottom end of the seat back near the seat cushion is pivotally connected to the movable end of the single linkage member. The second backrest drive device is configured to drive the seat back to pivot about a pivot portion located at the movable end of the single linkage member.

3. The seat assembly for a motor vehicle according to claim 1, characterized in that, The first linkage mechanism includes a first linkage member, a second linkage member, and a third linkage member. The first linkage member and the second linkage member each include a constrained end and a movable end. The third linkage member includes a first foot, a second foot, and a third foot. The movable ends of the first linkage member and the second linkage member are pivotally connected to the first and second feet of the third linkage member, respectively. The bottom end of the seat back near the seat cushion is pivotally connected to the third foot of the third linkage member. One of the first linkage member or the second linkage member serves as the active linkage member. The movable end of the first backrest drive device is pivotally connected to the active linkage member. The first backrest drive device is configured to drive the active linkage member to pivot the first linkage member around a first pivot portion disposed at its constrained end and to pivot the second linkage member around a second pivot portion disposed at its constrained end. The second backrest drive device is configured to drive the seat back to pivot around a third pivot portion disposed at the third foot of the third linkage member.

4. The seat assembly for a motor vehicle according to any one of claims 1 to 3, characterized in that, The first backrest drive device includes a motor and a lead screw. The motor is connected to the lead screw in a transmission manner, so that the lead screw can move relative to the motor. The motor and the lead screw respectively form one of the constrained end and the movable end of the first backrest drive device.

5. The seat assembly for a motor vehicle according to any one of claims 1 to 3, characterized in that, The first backrest drive device includes a motor, a lead screw, and a nut slider. The motor is configured to drive the nut slider to move relative to the motor via the lead screw. The motor and the nut slider respectively form one of the constrained end and the movable end of the first backrest drive device.

6. The seat assembly for a motor vehicle according to any one of claims 1 to 3, characterized in that, The first backrest drive device includes a motor and a rack and pinion mechanism, the motor causing the rack to move relative to the motor via the gear, the motor and the rack forming one of the constrained end and the movable end of the first backrest drive device, respectively.

7. The seat assembly for a motor vehicle according to claim 2 or 3, characterized in that, The movable end of the first backrest drive device is pivotally connected to the active linkage to form a pivot drive unit, which is located outside the line connecting the constraint end and the movable end of the active linkage.

8. The seat assembly for a motor vehicle according to claim 2 or 3, characterized in that, The movable end of the first backrest drive device is pivotally connected to the active linkage to form a pivot drive unit, which is located between the constraint end and the movable end of the active linkage.

9. The seat assembly for a motor vehicle according to claim 2 or 3, characterized in that, The constraint end of the first backrest drive device is located in front of the constraint end of the active linkage.

10. The seat assembly for a motor vehicle according to claim 9, characterized in that, The first backrest drive device and the active linkage are designed such that when the distance between the constrained end and the movable end of the first backrest drive device is shortened, the active linkage pivots forward.

11. The seat assembly for a motor vehicle according to claim 2 or 3, characterized in that, The constraint end of the first backrest drive device is located after the constraint end of the active linkage.

12. The seat assembly for a motor vehicle according to claim 11, characterized in that, The first backrest drive device and the active linkage are designed such that when the distance between the constrained end and the movable end of the first backrest drive device is shortened, the active linkage pivots backward.

13. The seat assembly for a motor vehicle according to claim 3, characterized in that, The seat assembly includes a base assembly, and the seat back includes a backrest frame, wherein the constraint ends of the first backrest drive device, the first linkage member and the second linkage member of the first linkage mechanism are pivotally connected to the base assembly, and the second backrest drive device and the third linkage member of the first linkage mechanism are mounted on the backrest frame.

14. The seat assembly for a motor vehicle according to claim 13, characterized in that, The first linkage mechanism includes two first linkage components, two second linkage components, and two third linkage components. The two third linkage components are respectively installed on the left and right sides of the backrest frame. The movable ends of the two first linkage components of the first linkage mechanism are pivotally connected to one of the third linkage components, and the movable ends of the two second linkage components of the first linkage mechanism are pivotally connected to one of the third linkage components.

15. The seat assembly for a motor vehicle according to claim 13, characterized in that, The second backrest drive device includes a motor and an angle adjuster.

16. The seat assembly for a motor vehicle according to claim 15, characterized in that, The third linkage component of the first linkage mechanism is configured as a connecting plate for the angle adjuster of the second backrest drive device.

17. The seat assembly for a motor vehicle according to any one of claims 1 to 3, characterized in that, The second linkage mechanism includes at least one constrained end and at least one movable end, wherein a corresponding movable end of the at least one movable end of the second linkage mechanism is pivotally connected to the seat cushion, and the second linkage mechanism is configured to pivot about a pivot portion disposed at a corresponding constrained end of the at least one constrained end of the second linkage mechanism under the drive of at least one seat cushion driving device.

18. The seat assembly for a motor vehicle according to claim 17, characterized in that, The second linkage mechanism includes a first linkage member and a second linkage member. The first linkage member and the second linkage member of the second linkage mechanism each include a constrained end and a movable end. The end of the seat cushion near the seat back is pivotally connected to the movable end of the first linkage member of the second linkage mechanism, while the other end away from the seat back is pivotally connected to the movable end of the second linkage member of the second linkage mechanism.

19. The seat assembly for a motor vehicle according to claim 18, characterized in that, The first or second linkage member of the second linkage mechanism is configured to pivot around a pivot portion located at the constraint end of the corresponding first or second linkage member of the second linkage mechanism under the drive of the seat cushion drive device.

20. The seat assembly for a motor vehicle according to claim 19, characterized in that, The seat cushion includes a seat cushion frame, the seat cushion frame including two side connectors located on the left and right sides, a front connector for connecting the two side connectors at the front of the two side connectors, and a rear connector for connecting the two side connectors at the rear of the two side connectors. The second linkage mechanism includes two first linkage components and two second linkage components. The two first linkage components of the second linkage mechanism are respectively installed on the left and right sides of the seat cushion frame at the rear of the two side connectors, and the two second linkage components of the second linkage mechanism are respectively installed on the left and right sides of the seat cushion frame at the front of the two side connectors.

21. The seat assembly for a motor vehicle according to claim 20, characterized in that, The seat cushion drive device includes a motor, which is mounted on the inside of one of the two side connectors.

22. The seat assembly for a motor vehicle according to any one of claims 18 to 21, characterized in that, The seat assembly includes a base assembly, and the constraint ends of the first and second linkage components of the second linkage mechanism are pivotally connected to the base assembly.

23. The seat assembly for a motor vehicle according to any one of claims 18 to 21, characterized in that, The seat assembly is configured to move between a designed position, a raised position, a folded position, a reclining position, and a convenient access position. In the designed position, the seat back of the seat assembly is at a predetermined angle relative to the seat cushion to support the occupant; In the high-profile position, the seat cushion of the seat assembly is raised or lowered by a predetermined height in the height direction compared to the design position; In the folded position, the seat back of the seat assembly and the seat cushion are substantially overlapped to increase the space of the motor vehicle; In the lying position, the seat back of the seat assembly is substantially flush with the seat cushion; and In the convenient access position, the seat back of the seat assembly is pivoted at a predetermined angle toward the seat cushion relative to the design position and / or the seat cushion is moved forward a predetermined distance relative to the design position to increase the space behind the seat assembly for easy entry and exit of the occupant.

24. The seat assembly for a motor vehicle according to claim 17, characterized in that, The second linkage mechanism includes a first linkage member, a second linkage member, and a third linkage member. The first linkage member of the second linkage mechanism includes a constrained end and a movable end. The second linkage member of the second linkage mechanism includes a first movable end and a second movable end. The third linkage member of the second linkage mechanism includes a constrained end and a movable end. The end of the seat cushion near the seat back is pivotally connected to the movable end of the first linkage member of the second linkage mechanism, while the other end away from the seat back is pivotally connected to the first movable end of the second linkage member of the second linkage mechanism. The second movable end of the second linkage member of the second linkage mechanism is pivotally connected to the movable end of the third linkage member of the second linkage mechanism.

25. The seat assembly for a motor vehicle according to claim 24, characterized in that, The seat assembly is configured to move between a designed position, a high-profile position, a zero-gravity position, a folded position, a reclining position, and an easy-access position. In the designed position, the seat back of the seat assembly is at a predetermined angle relative to the seat cushion to support the occupant; In the high-profile position, the seat cushion of the seat assembly is raised or lowered by a predetermined height in the height direction compared to the design position; At the zero-gravity position, the seat assembly is adjusted to a designed zero-pressure state; In the folded position, the seat back of the seat assembly and the seat cushion are substantially overlapped to increase the space of the motor vehicle; In the lying position, the seat back of the seat assembly is substantially flush with the seat cushion; and In the convenient access position, the seat back of the seat assembly is pivoted at a predetermined angle toward the seat cushion relative to the design position and / or the seat cushion is moved forward a predetermined distance relative to the design position to increase the space behind the seat assembly for easy entry and exit of the occupant.

26. The seat assembly for a motor vehicle according to claim 25, characterized in that, One of the second linkage component and the third linkage component of the second linkage mechanism is configured as a zero-gravity linkage component for realizing the zero-gravity position of the seat assembly.

27. The seat assembly for a motor vehicle according to claim 26, characterized in that, The seat assembly includes a first seat cushion drive device and a second seat cushion drive device. The first seat cushion drive device is used to drive a first linkage member of the second linkage mechanism to pivot around a first pivot portion disposed at the constraint end of the first linkage member of the second linkage mechanism, while the second seat cushion drive device is used to drive the zero-gravity linkage member to pivot.

28. The seat assembly for a motor vehicle according to claim 27, characterized in that, During the movement of the seat assembly from the designed position to the zero-gravity position, the first seat cushion drive device locks the first linkage member of the second linkage mechanism so that it cannot move; and during the movement of the seat assembly from the designed position to other positions besides the zero-gravity position, the second seat cushion drive device locks the zero-gravity linkage member of the second linkage mechanism so that it cannot move.

29. The seat assembly for a motor vehicle according to claim 17, characterized in that, The second linkage mechanism includes a first linkage member and a second linkage member. The first linkage member of the second linkage mechanism is configured as a slide plate. The second linkage member of the second linkage mechanism includes a constrained end and a movable end. The end of the seat cushion near the seat back is slidably mounted in the slide groove of the slide plate, while the other end away from the seat back is pivotally connected to the movable end of the second linkage member of the second linkage mechanism.

30. The seat assembly for a motor vehicle according to claim 29, characterized in that, The second linkage member of the second linkage mechanism is configured to pivot around the pivot portion located at the constraint end of the second linkage member of the second linkage mechanism under the drive of the cushion drive device, and when the second linkage member pivots, the end of the seat cushion near the seat back slides in the groove of the slide plate.

31. The seat assembly for a motor vehicle according to claim 30, characterized in that, The seat assembly is configured to move between a designed position, a folded position, a reclining position, and an easy-access position. In the designed position, the seat back of the seat assembly is at a predetermined angle relative to the seat cushion to support the occupant; In the folded position, the seat back of the seat assembly and the seat cushion are substantially overlapped to increase the space of the motor vehicle; In the reclining position, the seat back of the seat assembly is substantially flush with the seat cushion, and In the convenient access position, the seat back of the seat assembly is pivoted at a predetermined angle toward the seat cushion relative to the design position and / or the seat cushion is moved forward a predetermined distance relative to the design position to increase the space behind the seat assembly for easy entry and exit of the occupant.

32. The seat assembly for a motor vehicle according to any one of claims 1 to 3, characterized in that, The at least one constraint end of the first linkage mechanism can be pivotally mounted on the vehicle floor, or can be pivotally mounted on a slide rail that can slide relative to the vehicle floor to move the seat assembly, or can be pivotally mounted on a rotating component that can rotate relative to the vehicle floor to rotate the seat assembly about a vertical direction.

33. The seat assembly for a motor vehicle according to claim 17, characterized in that, The at least one constraint end of the second linkage mechanism can be pivotally mounted on the vehicle floor, or can be pivotally mounted on a slide rail that can slide relative to the vehicle floor to move the seat assembly, or can be pivotally mounted on a rotating component that can rotate relative to the vehicle floor to rotate the seat assembly about the vertical direction.

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