Seat, control method, control device, and driving apparatus

Abstract

This application provides a seat, control method, control device, and driving equipment, relating to the field of vehicle technology. The seat includes a base, a backrest frame, and a seat cushion frame. The backrest frame is rotatably connected to the base, and the seat cushion frame is movably connected to the base. The seat includes a seated state and an unfolded state. During the transition from the seated state to the unfolded state, the backrest frame is configured to rotate rearward relative to the base, and the seat cushion frame is configured to move forward and upward relative to the base along a first trajectory. Based on this design, when the seat transitions from the seated state to the unfolded state, as the backrest frame rotates rearward, the seat cushion frame can simultaneously rise forward and upward, creating physical space. This trajectory coordination effectively reduces physical interference between the lower end of the backrest and the rear end of the seat cushion, laying a structural foundation for the seat to form a completely flat bed surface and a comfortable reclining posture without lumbar support, thereby effectively improving the seat's performance and the occupant's user experience.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more specifically, to a seat, control method, control device, and driving equipment. Background Technology

[0002] In the current passenger vehicle market, seat configurations that can be converted into beds or fully reclined positions are becoming increasingly common. However, existing fully reclined seats typically only achieve this by reclining the backrest. During this process, the fixed seat cushion structure cannot be adjusted in angle or height simultaneously. When the backrest is fully extended, the lower part of the backrest rotates forward relative to the seat cushion, directly pressing against the occupant's lower back, causing significant discomfort. Furthermore, in the fully reclined position, there is a height difference between the backrest and the seat cushion, preventing the formation of a flat surface and negatively impacting the occupant's experience. Therefore, how to further improve seat performance to enhance the occupant's experience has become a pressing technical challenge for the industry. Summary of the Invention

[0003] This application provides a seat, control method, control device, and driving equipment that are beneficial for improving the performance of the seat to enhance the occupant's user experience.

[0004] In a first aspect, a seat is provided, comprising: a base, a backrest frame, and a seat cushion frame, wherein the backrest frame is rotatably connected to the base, and the seat cushion frame is movably connected to the base; the seat includes a sitting state and an unfolded state, wherein during the process of switching the seat from the sitting state to the unfolded state, the backrest frame is configured to rotate rearward relative to the base, and the seat cushion frame is configured to move relative to the base along a forward and upward first trajectory.

[0005] In the embodiments of this application, the unfolded state may include a bed state and a reclining state, wherein the reclining state may also be referred to as a "zero gravity" state.

[0006] The first trajectory of the seat cushion frame relative to the base can refer to the continuous displacement and path experienced by the seat cushion frame as a whole or a certain feature point in three-dimensional space relative to the stationary base during the transition from a sitting state to an unfolded state. This first trajectory can be a straight line trajectory, a curved trajectory, or a composite trajectory combining straight lines and curves. Different forms of the first trajectory depend on the specific mechanical connection method used between the base and the seat cushion frame (such as a straight track guided by a straight rail, a curved track guided by a multi-link, or a composite trajectory, etc.), and this application does not specifically limit this.

[0007] The seat frame can move forward and upward relative to the base, thereby forming a first trajectory. The "forward movement" and "upward movement" can be performed simultaneously in time (for example, the seat frame can move synchronously in a straight line or arc trajectory that moves upward at an angle); or, the "forward movement" and "upward movement" can be performed sequentially (for example, the seat frame can move forward first and then rise upward, or it can rise upward first and then move forward). This application does not specifically limit this.

[0008] The forward and upward movement of the seat cushion frame and the backward rotation of the backrest frame can occur simultaneously in time. Alternatively, the movement of the seat cushion frame and the movement of the backrest frame can occur sequentially, or they can occur simultaneously only for a portion of the time. This application does not limit the specific relative timing of the movements of the seat cushion frame and the backrest frame.

[0009] Through the technical solution of this application embodiment, the backrest frame and the seat cushion frame can achieve better coordination. When the seat switches from the sitting state to the unfolded state, as the backrest frame rotates backward, the seat cushion frame can simultaneously rise forward and upward to make room. This coordination of trajectories can effectively reduce physical interference between the lower end of the backrest and the rear end of the seat cushion, laying a structural foundation for the seat to form a completely flat bed surface and a large reclining posture without lumbar support, thereby effectively improving the performance of the seat and the user experience of the occupants.

[0010] In conjunction with the first aspect, in some possible implementations, the unfolded state includes a bed-like state, during which the rear end of the seat cushion frame is configured to move along an upward second trajectory relative to the front end of the seat cushion frame as the seat transitions from the sitting state to the bed-like state.

[0011] For the seat cushion frame, the front end refers to the side of the seat cushion frame closest to the occupant's knees, facing directly forward (e.g., the direction of vehicle travel), primarily supporting the occupant's thighs. The rear end refers to the side of the seat cushion frame closest to the backrest frame, away from the front, primarily supporting the occupant's buttocks. The movement trajectory of the rear end of the seat cushion frame relative to the front end can be a straight line, a curved line, or a combination of both. Due to the upward lifting of the rear end of the seat cushion frame, the rear end undergoes an upward displacement relative to the front end in the height direction, thereby changing the overall pitch angle of the seat cushion.

[0012] Regarding the movement of the entire seat cushion frame along the first trajectory and the movement of the rear end of the seat cushion frame along the second trajectory, the two can occur simultaneously in time. Alternatively, the movement along the first trajectory and the movement along the second trajectory can occur sequentially, or they can occur simultaneously only for a portion of the time. This application does not limit the specific relative timing of the movement along the first trajectory and the movement along the second trajectory in its embodiments.

[0013] Optionally, in the assembled bed configuration, the first support surface of the backrest frame and the second support surface of the seat cushion frame are interconnected, and the angle difference between the included angle and the flat angle between the first and second support surfaces is within a first angle range. This first angle range can be a small allowable tolerance interval. By controlling the angle difference within the first angle range, the support surfaces of the backrest and seat cushion can achieve a near-flat or completely flat seamless splicing effect.

[0014] Through the technical solution of this application embodiment, while the seat cushion frame moves forward and rises as a whole, it can also independently rise at the rear end, thereby adaptively changing the tilt angle of the seat cushion surface. This structural action can effectively fill the stepped gap between the backrest and the seat cushion after the backrest is folded down and the seat cushion is formed into a bed, eliminating the height difference between the seat cushion and the backrest, thus allowing the two to be smoothly spliced ​​together to form a comfortable bed surface that is nearly flat or absolutely flat, thereby improving the convenience of assembling the seat into a bed and enhancing the user experience of the occupants.

[0015] In conjunction with the first aspect, some possible implementations also include: a side wing frame that is movably connected to the backrest frame; during the process of the seat switching from a seated state to an unfolded state, the movement of the side wing frame and the backrest frame is asynchronous for at least part of the time.

[0016] During the transition of the seat from a seated position to an unfolded position (e.g., a bed position), the movement of the side wing frame and the backrest frame is asynchronous for at least a portion of the time. Specifically, the side wing frame and the backrest frame are inconsistent in at least one of the following motion parameters, resulting in asynchronous movement: start time, movement speed, movement distance, stop time, movement sequence, and movement type; during at least a portion of the time the seat transitions from a seated position to an unfolded position, the movement rhythms of the side wing frame and the backrest frame are misaligned, their movement trajectories are separated, and they are not synchronized.

[0017] Optionally, in the deployed state, the side wing frame is separated from the vehicle's side structure. Traditional fixed side wings, when rotating rearward with the backrest, are prone to physical interference with the vehicle's gradually narrowing rear body structure (such as the C-pillar or wheel arches). However, based on the aforementioned asynchronous movement design of the side wing frame and backrest frame, the side wing frame can actively avoid the vehicle's side structure during movement. This allows the side wing surface to maintain a safe clearance from the vehicle's side structure after the seat is deployed, thus reducing the risk of scratches during seat posture adjustments and providing better cabin layout compatibility.

[0018] In conjunction with the first aspect, in some possible implementations, the bottom end of the side wing frame is rotatably connected to the bottom end of the backrest frame; during the process of the seat switching from a seated state to an unfolded state, the rotational movement of the side wing frame is not synchronized with the rotational movement of the backrest frame for at least part of the time.

[0019] In some embodiments, during the transition of the seat from a sitting position to an unfolded position, the side wing frame is configured to: rotate in conjunction with the backrest frame during a first angle of rotation; and disengage from the backrest frame during a further rotation of the backrest frame from the first angle to a second angle. Here, the first angle can be an intermediate range of angles during the transition from a normal sitting position to an unfolded position (e.g., a bed position); the second angle can be the range of angles during the transition from a normal sitting position to a fully reclining position or a bed position, where the backrest frame rotates backward, and this second angle is greater than the first angle.

[0020] Optionally, the side wing frame is also configured to rotate forward by a third angle from the first angle, or the side wing frame may remain stationary. This third angle can be smaller than the first angle. In this embodiment, the forward movement of the side wing frame can be achieved by additionally configuring a separate side wing drive motor for the side wing frame. When the side wing frame is decoupled from the backrest frame, the side wing drive motor starts actuating, actively pushing the side wing frame forward by a certain angle compensation.

[0021] Besides the asynchronous rotational movements of the side wing frame and backrest frame described in the above embodiments, in some alternative embodiments, the side wing frame and backrest frame can move at different rotational angular velocities. During the process of the backrest frame reclining at a large angle, the angular velocity of the side wing frame rotating backward is less than that of the backrest frame. This continuous difference in angular velocity also results in the side wing frame exhibiting a forward-opening spatial posture relative to the main plane of the backrest in the final bed configuration, thereby freeing up space in the width direction. In other alternative embodiments, the backrest frame and side wing frame move at different times. For example, upon receiving an instruction to switch seat posture, the backrest frame first rotates backward to recline, while the side wing frame remains relatively stationary in the initial stage until the backrest frame rotates backward to a certain preset physical angle threshold, at which point the side wing frame is triggered to begin rotating backward or forward. This staggered initiation constitutes asynchronous rotational movement. In some alternative embodiments, the backrest frame and the side wing frame are independently controlled in terms of start-up time, rotational angular velocity, motion stroke and even rotational direction, thereby achieving any desired asynchronous spatial posture with greater precision.

[0022] In conjunction with the first aspect, in some possible implementations, in the unfolded state, the angle between the side wing frame and the seat cushion frame is the first angle, and the angle between the backrest frame and the seat cushion frame is the second angle, with the first angle being smaller than the second angle.

[0023] In some embodiments, when the seat is in the bed configuration, the second included angle can be close to 180°, and the side wing frame can form an obtuse or acute angle relative to the seat cushion frame. This spatial posture setting, where the first included angle is smaller than the second included angle, allows the backrest frame to be laid flat to provide longitudinal sleeping space, while the side wings on both sides are moderately tilted forward relative to the main plane of the backrest, thereby freeing up a great deal of lateral space for occupants in the width direction of the vehicle. This design effectively alleviates the cramped and squeezed feeling on the occupants' arms and shoulders caused by the traditional fixed side wings rotating backward with the backrest, and significantly improves the spaciousness and riding comfort of occupants in a relaxed posture.

[0024] In conjunction with the first aspect, in some possible implementations, the seat also includes: a headrest body movably connected to the top of the backrest frame, the headrest body being configured to move relative to the top of the backrest frame.

[0025] By configuring the headrest body to move relative to the top of the backrest frame, the headrest body can be adjusted in posture, which not only helps to adapt to the overall posture adjustment of the seat, but also helps to meet other personalized needs of the occupants.

[0026] In conjunction with the first aspect, in some possible implementations, during the transition of the seat from a seated state to an unfolded state, and / or, in the unfolded state, the headrest body is configured to move relative to the top of the backrest frame along the length of the backrest frame, and / or, along the thickness of the backrest frame.

[0027] Based on this implementation, in the unfolded state, such as the bed configuration, the headrest body moves outward along the length of the backrest (i.e., away from the top of the backrest), extending the effective length of the bed surface forward, thereby improving the passenger's user experience. The headrest body can also be adjusted upward along the thickness of the backrest, allowing it to protrude directly from the flat bed surface. In the bed configuration, the headrest body can directly function as a pillow for rest, eliminating the need for passengers to separately configure and lay out an air mattress or pillow when the bed is in place.

[0028] In conjunction with the first aspect, in some possible implementations, during the transition of the seat from a seated state to an unfolded state, and / or, in the unfolded state, the headrest body is configured to flip relative to the top of the backrest frame. After folding, the bottom surface of the headrest body faces upward, allowing it to be joined with the support surface of the backrest to form a continuous large surface.

[0029] In conjunction with the first aspect, in some possible implementations, in the unfolded state, the height difference between the support surface of the headrest body and the support surface of the backrest frame is within a first height range.

[0030] In this embodiment, the height difference between the support surface of the headrest body and the support surface of the backrest can be a physical quantity used to measure the flatness of the splicing position when the two are unfolded (for example, the vertical distance between the horizontal planes where the highest protrusions of the two are located). The first height range can be the allowable tolerance range of the height difference. The first height range can be a range value preset according to the needs of the occupants or the vehicle configuration, and it can be fixed or dynamically changed. In some embodiments, the first height range can be close to zero; or, in other embodiments, when the headrest body can move along the thickness direction of the backrest frame, the first height range can be a numerical range (e.g., tens of millimeters) that meets the ergonomic neck support requirements, so that the protruding headrest body can directly serve as a pillow for sleeping. This embodiment does not limit the specific value of the first height range.

[0031] In conjunction with the first aspect, in some possible implementations, the seat also includes: a footrest frame movably connected to the seat cushion frame; during the process of the seat switching from a sitting state to an unfolded state, the footrest frame moves relative to the base along a forward and upward third trajectory.

[0032] Based on this technical solution, by setting up a movable footrest frame, it can be folded down in front of the seat cushion to save legroom during normal sitting. When switching to a reclining or bed-like position, the footrest frame rises forward and unfolds, providing stable and comfortable support for the occupant's lower legs and feet. In the bed-like position, the raised, horizontal footrest surface smoothly connects with the seat cushion surface, which helps to significantly extend the effective support area of ​​the seat in the longitudinal dimension, providing an excellent structural support foundation for providing a deep, nearly flat, and spacious bed surface.

[0033] In conjunction with the first aspect, in some possible implementations, the seat also includes a first transmission assembly connected between the base and the seat cushion frame. The first transmission assembly is used to drive a first drive source, and under the drive of the first drive source, the first transmission assembly drives the seat cushion frame to move along a first trajectory.

[0034] In conjunction with the first aspect, in some possible implementations, the first transmission assembly includes a first linkage mechanism, which includes: a first link extending along the depth direction of the seat, with the seat cushion frame connected to the first link; a second link, with both ends hinged to the front end of the first link and the front end of the base, respectively; and a third link, with both ends hinged to the rear end of the first link and the rear end of the base, respectively. At least one link in the first linkage mechanism is used to drive a first drive source, and the first drive source is used to drive multiple links in the first linkage mechanism to move in tandem.

[0035] In this embodiment, the base, first link, second link, and third link together constitute a highly stable four-bar linkage. By introducing the four-bar linkage design, this embodiment can accurately convert the linear driving force of the first drive source into a composite displacement motion of the seat cushion frame moving forward and upward. This mechanical action not only operates smoothly and reliably, but also provides ample physical clearance for the rearward rotation of the backrest frame, thereby effectively solving the problem of motion interference between the seat cushion and the backrest.

[0036] In conjunction with the first aspect, in some possible implementations, the first transmission assembly includes two first linkage mechanisms arranged on the base along the width direction of the seat; the first transmission assembly also includes a first drive link connected between the two first linkage mechanisms, the first drive link being used to connect to a first drive source, so that the two first linkage mechanisms are connected to the first drive source through the first drive link.

[0037] The technical solution of this application adopts a drive architecture design with symmetrical arrangement on both sides and rigid coupling in the lateral direction, which can effectively reduce the phenomenon of left and right tilting, jamming or abnormal noise during the overall lifting process of the seat cushion frame, and improve the stability and reliability of the seat cushion frame movement.

[0038] In conjunction with the first aspect, in some possible implementations, the first transmission assembly includes two first drive links, one of which is connected to a third link in the two first linkage mechanisms, and the other is connected to a first link in the two first linkage mechanisms; the first drive source includes a first lead screw motor assembly, the two ends of which are rotatably connected to the two first drive links respectively.

[0039] The technical solution of this application embodiment utilizes a first lead screw motor assembly arranged between two transverse first drive links to apply push and pull forces. This structural design not only cleverly and fully utilizes the limited physical space under the seat cushion, but also enhances the overall strength and reliability of the seat cushion frame's movement process through strong bilateral physical constraints, thereby improving the seat's performance.

[0040] In conjunction with the first aspect, in some possible implementations, the seat also includes a second transmission assembly connected between the first transmission assembly and the seat cushion frame. The second transmission assembly is used to connect to a second drive source, and under the drive of the second drive source, the second transmission assembly drives the rear end of the seat cushion frame to move relative to the front end of the seat cushion frame along an upward second trajectory.

[0041] In conjunction with the first aspect, in some possible implementations, the second transmission assembly includes a second linkage mechanism, which includes a fourth link for transmission connection to a second drive source; wherein, one end of the fourth link is hinged to the middle or rear end of the seat cushion frame, the other end of the fourth link is hinged to the middle or rear end of the first link in the first transmission assembly, and the front end of the first link is hinged to the front end of the seat cushion frame.

[0042] In conjunction with the first aspect, in some possible implementations, the second transmission assembly includes two fourth links, which are respectively hinged to two first links along the width direction of the seat. The second transmission assembly also includes a second drive link, which is connected between the two fourth links.

[0043] In this embodiment, the two fourth links can serve as the left and right lifting arms, respectively, symmetrically arranged on the left and right sides below the seat cushion frame. The second drive link acts as a laterally spanning rigid transmission beam, physically binding the two independent fourth links into a synchronously linked rigid whole. This bilaterally symmetrical and laterally coupled structural design allows the upward lifting force to be evenly distributed to the left and right sides of the rear end of the seat cushion frame. This structural design enhances the torsional stiffness of the transmission architecture, effectively reducing lateral tilting, jamming, or uneven loading at the rear end of the seat cushion frame due to unilateral force, thereby improving the stability of seat posture adjustment.

[0044] In conjunction with the first aspect, in some possible implementations, the two fourth links are respectively hinged to the middle or rear end of the two first links, and the front ends of the two first links are fixedly connected to the first drive link; the second drive source includes a second lead screw motor assembly, one end of which is fixedly connected to the first drive link, and the other end is rotatably connected to the second drive link or the fourth link.

[0045] By arranging the second drive source among the internal linkage mechanisms through the technical solution of this embodiment, it is avoided that the second drive source is anchored downwards to the base. On the one hand, this arrangement helps to save vertical physical space under the seat cushion and prevents spatial interference with other tracks or frames at the bottom; on the other hand, the second drive source and the second transmission assembly can move with the first transmission assembly. No matter where the entire seat cushion frame moves under the drive of the first transmission assembly, the second drive source can move along with it, maintaining a better driving angle at all times, which is conducive to precise and efficient adjustment of the height of the rear end of the seat cushion frame.

[0046] In conjunction with the first aspect, in some possible implementations, the seat further includes: a headrest rod, the first end of which is connected to the top of the backrest frame; a headrest body movably disposed at the second end of the headrest rod; the headrest body includes a first state and a second state, in the first state the headrest body is configured to be locked to the second end of the headrest rod; in the second state the headrest body is configured to be unlocked from the second end of the headrest rod and move relative to the second end.

[0047] Optionally, during the process of the seat switching from a seated state to an unfolded state, and / or, in the unfolded state, the headrest body is configured to switch from a first state to a second state.

[0048] Optionally, when the seat is in the seated position, the headrest body is configured to switch from a first state to a second state. For example, the headrest body is configured to flip relative to the second end of the headrest rod. This helps to lower the height of the headrest body, thereby effectively preventing the upright headrest body from obstructing the view, significantly improving the in-vehicle visibility (e.g., improving the forward visibility of rear passengers or the driver's rear-view mirror visibility), and visually making the cabin space appear more open and spacious.

[0049] In conjunction with the first aspect, in some possible implementations, the seat also includes: an elastic member connected to the second end and the headrest body, wherein in the second state, after the headrest body is unlocked from the second end, the elastic member is used to drive the headrest body to rotate relative to the second end.

[0050] In conjunction with the first aspect, in some possible implementations, the second end of the headrest rod is provided with a fixed tooth, and the headrest body is provided with a movable tooth. In the first state, the fixed tooth and the movable tooth mesh with each other, so that the headrest body and the second end are locked together. The seat also includes a first transmission mechanism, which is connected to the movable tooth and is used to connect to a third drive source. In the second state, the third drive source is used to drive the first transmission mechanism, and the first transmission mechanism drives the movable tooth to move to unlock it from the fixed tooth, so that the headrest body is unlocked from the second end.

[0051] In conjunction with the first aspect, in some possible implementations, the first transmission mechanism includes a rotating rod extending along the width direction of the seat, the rotating rod being rotatably connected to the headrest body and fixedly connected to the moving gear; wherein, in the second state, the third drive source is used to drive the rotating rod to rotate so as to drive the moving gear to move.

[0052] In this embodiment, the locking mechanism formed by the moving teeth and fixed teeth, and the transmission mechanism formed by the rotating rod, can effectively achieve rigid locking of the headrest body and effectively resist multi-dimensional impact forces. At the same time, the gear meshing form combined with the rotating linkage transmission makes full use of the narrow space inside the headrest, making the unlocking action more responsive and the mechanical structure highly compact, greatly improving the reliability of the headrest posture switching.

[0053] In conjunction with the first aspect, in some possible implementations, the seat further includes a second transmission mechanism connected to the headrest body, the second transmission mechanism being used to connect to a fourth drive source; wherein, in the second state, the fourth drive source is used to drive the second transmission mechanism, the second transmission mechanism causing the headrest body to move relative to the second end along the length direction of the backrest frame, and / or, along the thickness direction of the backrest frame.

[0054] In a second aspect, a control method is provided, comprising: acquiring indication information, the indication information being used to indicate that a seat is switched from a sitting state to an unfolded state; and controlling the backrest frame of the seat to rotate rearward relative to the base, and the seat cushion frame to move forward and upward relative to the base along a first trajectory, according to the indication information.

[0055] In conjunction with the second aspect, in some possible implementations, the unfolded state includes the bed-like state; the method also includes: controlling the rear end of the seat cushion frame to move relative to the front end of the seat cushion frame along an upward second trajectory according to the instruction information.

[0056] In conjunction with the second aspect, in some possible implementations, the method also includes: controlling the movement of the side wing frame of the seat according to the instruction information, wherein the movement of the side wing frame is asynchronous with the movement of the backrest frame for at least part of the time.

[0057] In conjunction with the second aspect, in some possible implementations, the bottom end of the side wing frame is rotatably connected to the bottom end of the backrest frame; controlling the movement of the side wing frame of the seat includes: controlling the rotational movement of the side wing frame, wherein the rotational movement of the side wing frame is asynchronous with the rotational movement of the backrest frame for at least a portion of the time.

[0058] In conjunction with the second aspect, in some possible implementations, controlling the rotational movement of the side wing frame includes: controlling the side wing frame to rotate backward by a first angle following the backrest frame; controlling the backrest frame to continue rotating from the first angle to a second angle, wherein the side wing frame and the backrest frame are decoupled.

[0059] In conjunction with the second aspect, among some possible implementations, the method also includes: controlling the flank frame to rotate forward from the first angle by a third angle.

[0060] In conjunction with the second aspect, among some possible implementations, the method also includes: controlling the movement of the headrest body of the seat relative to the top of the backrest frame according to the instruction information.

[0061] In conjunction with the second aspect, in some possible implementations, controlling the movement of the headrest body relative to the top of the backrest frame includes: controlling the headrest body to move relative to the top of the backrest frame along the length direction of the backrest frame, and / or, along the thickness direction of the backrest frame.

[0062] In conjunction with the second aspect, in some possible implementations, controlling the movement of the headrest body relative to the top of the backrest frame includes: controlling the headrest body to flip relative to the top of the backrest frame.

[0063] In conjunction with the second aspect, in some possible implementations, the method also includes: controlling the footrest frame of the seat to move relative to the base along a forward and upward third trajectory according to the instruction information.

[0064] Thirdly, a control device is provided, comprising: a memory, a processor, and a communication interface; wherein the memory is used to store instructions, and the processor is used to execute the instructions stored in the memory to control the communication interface to acquire information, thereby enabling the control device to implement the control method as described in the second aspect or any implementation thereof.

[0065] Fourthly, a driving device is provided, comprising: a seat as described in the first aspect or any implementation thereof, and / or, as described in the third aspect, a control device. Attached Figure Description

[0066] Figure 1 A schematic diagram of a seat provided in an embodiment of this application is shown.

[0067] Figure 2 A schematic diagram of another seat provided in an embodiment of this application is shown.

[0068] Figure 3 This illustration shows a schematic diagram of a transmission assembly between the seat frame and the base provided in an embodiment of this application.

[0069] Figure 4 An exploded view of the seat frame and transmission assembly provided in an embodiment of this application is shown.

[0070] Figure 5 A schematic diagram of yet another seat provided in an embodiment of this application is shown.

[0071] Figure 6 A schematic diagram of yet another seat provided in an embodiment of this application is shown.

[0072] Figure 7 A schematic diagram of a headrest for a seat provided in an embodiment of this application is shown.

[0073] Figure 8 A schematic diagram of the headrest of another seat provided in an embodiment of this application is shown.

[0074] Figure 9 A schematic diagram of yet another seat provided in an embodiment of this application is shown.

[0075] Figure 10 A schematic diagram of the headrest body and headrest rod provided in an embodiment of this application is shown.

[0076] Figure 11 It shows Figure 10 A magnified view of region A in part (b).

[0077] Figure 12 A schematic diagram of a control method provided in an embodiment of this application is shown.

[0078] Figure 13 A schematic diagram of a control device provided in an embodiment of this application is shown.

[0079] Figure 14 A schematic diagram of another control device provided in an embodiment of this application is shown. Detailed Implementation

[0080] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0081] In the description of the embodiments in this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of a single item or multiple items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0082] The use of prefixes such as "first" and "second" in this application embodiment is solely for distinguishing different descriptive objects and does not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes to distinguish descriptive objects in this application embodiment does not constitute a limitation on the described objects. The description of the described objects is found in the claims or the context of the embodiments, and the use of such prefixes should not constitute unnecessary restrictions.

[0083] For ease of description, only the parts relevant to this application are shown in the accompanying drawings. The exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed descriptions will be omitted.

[0084] The directional terms appearing in the description of this application refer to the directions shown in the figures and are not intended to limit the specific structure of this application. In the description of this application, unless otherwise explicitly specified and limited, terms such as "installation" and "connection" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0085] This application relates to a driving device, which may include road vehicles, water vehicles, air vehicles, industrial equipment, agricultural equipment, or entertainment equipment. For example, the driving device may be a vehicle, which is a vehicle in a broad sense, including transportation vehicles (such as commercial vehicles, passenger cars, motorcycles, flying cars, trains, etc.), industrial vehicles (such as forklifts, trailers, tractors, etc.), engineering vehicles (such as excavators, bulldozers, cranes, etc.), agricultural equipment (such as lawnmowers, harvesters, etc.), amusement equipment, toy vehicles, etc. This application does not specifically limit the type of vehicle.

[0086] More specifically, this application relates to a seat in a driving device. In daily use, the seat is typically in a seated position, where the backrest, seat cushion, and headrest (locked in an upright position) provide regular seating support for the occupant. To further enhance the occupant's rest experience in the vehicle, the seat can switch from a seated position to an unfolded position. Depending on the occupant's different rest needs, the unfolded position in this application embodiment may specifically include a fully reclining position (or a "zero-gravity" position) and a bed-like position.

[0087] Specifically, the reclining position refers to adjusting the seat back to a large angle (e.g., above 40°), combined with leg rests and other components, to put the occupant in a relaxed semi-reclining posture. However, existing seats have a significant structural flaw when adjusting to this position: because the fixed seat cushion cannot adjust its angle and height simultaneously, when the backrest reclines at a large angle, its lower end inevitably rotates forward, directly pressing against the occupant's lower back, causing severe discomfort from "back pressure."

[0088] The "bed-like" state refers to the seat back reclining at a large angle (e.g., 180°), creating a bed-like surface where occupants can lie completely flat and sleep. Most current seat-to-bed solutions are cumbersome to operate, and due to inherent height differences and gaps between components when the seat is folded down, occupants must additionally lay an air mattress on the seat surface to barely use it, significantly impacting the convenience of the bed-like configuration.

[0089] Based on the current status and shortcomings of the above application scenarios, this application proposes an innovative seat mechanical architecture. When the backrest is reclined, the seat cushion can move in tandem to adaptively eliminate the height difference between the seat cushion and the backrest, overcome the problem of lumbar interference at the lower end of the backrest when the existing seat is unfolded, and facilitate the formation of a flat bed surface when the seat is in the unfolded state, thereby improving the user experience of the occupant in the unfolded state.

[0090] Figure 1 A schematic diagram of a seat provided in an embodiment of this application is shown. Figure 1 Part (a) shows a schematic diagram of the seat in the seated position. Figure 1 Part (b) shows a schematic diagram of the seat in the unfolded state.

[0091] like Figure 1 As shown, the seat 10 includes a backrest frame 100, a seat cushion frame 200, and a base 300. The backrest frame 100 is rotatably connected to the base 300, and the seat cushion frame 200 is movably connected to the base 300. See also... Figure 1 In parts (a) and (b), during the transition of the seat 10 from the seated state to the unfolded state, the backrest frame 100 is configured to rotate rearward relative to the base 300, and the seat cushion frame 200 is configured to move along a forward and upward trajectory relative to the base 300.

[0092] In this embodiment, "front" can refer to the direction the occupant's face faces when normally seated in a normal riding position, typically corresponding to the direction of travel of the driving device (such as a vehicle). Conversely, "rear" is the opposite direction, i.e., the direction the occupant's back faces when normally seated in a normal riding position, typically corresponding to the rear direction of the driving device (or the direction away from the front). "Up" can be the vertical direction of the base 300 pointing towards the roof, and "down" can be the vertical direction of the base 300 pointing towards the bottom of the vehicle. "Left" can be the horizontal direction where the left side of the occupant's body is located when normally seated and facing forward in a normal riding position, typically corresponding to the left side inside the driving device. Conversely, "right" can be the opposite direction, i.e., the horizontal direction where the right side of the occupant's body is located when normally seated and facing forward in a normal riding position, typically corresponding to the right side inside the driving device.

[0093] For ease of understanding, the accompanying drawings of the embodiments of this application illustrate the vehicle body coordinate system, wherein the x-axis direction corresponds to the front-to-back direction of the vehicle, and the positive x-axis direction can correspond to the front; the z-axis direction can correspond to the up-down direction of the vehicle, and the positive z-axis direction corresponds to the top; the y-axis direction corresponds to the left-to-right direction of the vehicle, and the positive y-axis direction can correspond to the left side of the vehicle.

[0094] The motion trajectory of the seat cushion frame 200 relative to the base 300 can refer to the continuous displacement and path experienced by the seat cushion frame 200 as a whole or a certain feature point in three-dimensional space relative to the stationary base 300 during the transition from a sitting state to an unfolded state. This motion "trajectory" can be a straight line trajectory, a curved trajectory, or a composite trajectory combining straight lines and curves. Different forms of trajectory depend on the specific mechanical connection method used between the base 300 and the seat cushion frame 200 (such as a straight track guided by a straight rail, a curved track guided by a multi-link, or a composite trajectory, etc.), and this application embodiment does not specifically limit this.

[0095] In this embodiment, the base 300 serves as the basic load-bearing structure of the entire seat 10. It is typically fixedly installed on the base plate of the driving equipment (or can be slidably installed back and forth via a slide rail mechanism), and is mainly used to provide a stable and robust physical support foundation for the various movable frames above.

[0096] The backrest frame 100 is located inside the backrest of the seat 10. The exterior of the backrest frame 100 can be a soft covering assembly consisting of foam and an outer cover, together forming the backrest. The backrest frame 100 primarily supports the occupant's back, and its bottom end is rotatably connected to the rear end region of the base 300. This "rotatable connection" can be implemented in several ways: for example, it can be directly hinged using a high-strength mechanical pin; or, it can be assembled using a seat adjuster (rotation axis). Through this rotatable connection, the backrest frame 100 can be adjusted in tilt angle around this connecting joint, allowing it to recline backward from the sitting position to the unfolded position until it is completely flat (e.g., reaching a perfectly flat angle of 180°).

[0097] The seat cushion frame 200 is located inside the seat cushion of the seat 10. The exterior of the seat cushion frame 200 may also be provided with a soft covering assembly consisting of foam sponge and an outer cover, thus forming the seat cushion together. The seat cushion frame 200 is mainly used to support the occupant's buttocks and thighs, and is movably connected above the base 300. The seat cushion frame 200 mainly includes a seat basin frame. Here, "movably connected" is not limited to a single dimension of motion, but refers to a mechanical coupling relationship that allows the seat cushion frame 200 to undergo positional and / or posture changes relative to the base 300 in space. To guide the seat cushion frame 200 to perform the aforementioned "forward and upward" trajectory, the movably connected mechanism may be implemented as a linkage mechanism or a guide rail mechanism, etc. In some embodiments, multiple linkages may be provided between the base 300 and the seat cushion frame 200. When driven by an external force, the multiple linkages move, thereby causing the seat cushion frame 200 to move obliquely upward as a whole. In other embodiments, the movably connected mechanism can be implemented using a sliding guide rail. For example, a slide rail with a specific tilt angle or upward arc curvature is provided on the base 300, and a slider that cooperates with the slide rail is fixed to the bottom of the seat frame 200. When driven by an external force, the slider slides along the slide rail, thereby guiding the entire seat frame 200 to move obliquely upward.

[0098] The seat frame 200 can move forward and upward relative to the base 300, thereby forming a first trajectory. The "forward movement" and "upward movement" can be performed simultaneously in terms of timing (for example, the seat frame 200 can move synchronously in a straight line or arc trajectory that is diagonally upward); or, the "forward movement" and "upward movement" can be performed sequentially (for example, the seat frame 200 can move forward first and then rise upward, or it can rise upward first and then move forward). This application embodiment does not specifically limit this.

[0099] Regarding the forward and upward movement of the seat cushion frame 200 and the backward rotation movement of the backrest frame 100, the two movements can occur simultaneously in terms of timing. For example, during the continuous backward reclining of the backrest frame 100 at a large angle, the seat cushion frame 200 simultaneously rises forward and upward, thereby dynamically and in real time providing physical clearance space at the bottom of the backrest frame 100 to better eliminate the lumbar discomfort caused by the forward rotation of the lower backrest. Alternatively, the trajectory movement of the seat cushion frame 200 and the backward rotation movement of the backrest frame 100 can occur sequentially, or they can occur simultaneously only for a portion of the time. As an example, the control device can control the seat cushion frame 200 to first rise forward and upward a certain distance or to the desired position, and then the backrest frame 100 can rotate backward and recline; or, the control device can control the backrest frame 100 to first rotate backward to a certain angle threshold, and then the seat cushion frame 200 can initiate the corresponding trajectory movement. In this embodiment, the specific relative timing of the movements of the seat cushion frame 200 and the backrest frame 100 is not limited.

[0100] Through the technical solution of this application embodiment, the backrest frame 100 and the seat cushion frame 200 can achieve better coordination. When the seat 10 switches from the sitting state to the unfolded state, when the backrest frame 100 rotates backward, the seat cushion frame 200 can simultaneously rise forward and upward to make room. This coordination of trajectories can effectively reduce physical interference between the lower end of the backrest and the rear end of the seat cushion, laying a structural foundation for the seat 10 to form a flat bed surface and a large reclining posture without lumbar support, thereby effectively improving the performance of the seat 10 and the user experience of the occupants.

[0101] Optionally, Figure 1 Part (b) can be a schematic diagram of the seat 10 in a reclining position. In other embodiments, the seat 10 can be switched from a sitting position to a bed position. As an example, Figure 2 A schematic diagram of another seat provided in an embodiment of this application is shown. Wherein, Figure 2 Part (a) shows a schematic diagram of the seat in the seated position. Figure 2 Section (b) shows a schematic diagram of the seat in its bed configuration.

[0102] like Figure 2 As shown, during the transition of the seat 10 from a sitting state to a bed state, the seat cushion frame 200 moves along a forward and upward trajectory relative to the base 300, and the rear end 202 of the seat cushion frame 200 also moves along an upward trajectory relative to the front end 201 of the seat cushion frame 200. For ease of distinction, in the various embodiments of this application, the "forward and upward trajectory" of the seat cushion frame 200 as a whole relative to the base 300 can be referred to as the first trajectory, and the "upward trajectory" of the rear end of the seat cushion frame 200 relative to the front end of the seat cushion frame 200 can be referred to as the second trajectory.

[0103] In this embodiment, for the seat cushion frame 200, the front end refers to the end of the seat cushion frame 200 near the occupant's knees, facing directly forward of the driving device (e.g., in the direction of vehicle travel), primarily used to support the occupant's thigh area; the rear end refers to the end of the seat cushion frame 200 near the backrest frame 100, away from the front, primarily used to support the occupant's buttocks area. The movement trajectory of the rear end 202 of the seat cushion frame 200 relative to the front end 201 can be a straight line trajectory, a curved trajectory, or a combination of both. Based on the upward lifting of the rear end 202 of the seat cushion frame 200, the rear end 202 of the seat cushion frame 200 undergoes an upward displacement relative to the front end 201 in the z-direction, thereby changing the overall pitch angle of the seat cushion.

[0104] In some embodiments, the front end 201 of the seat cushion frame 200 can be movably constrained to a transmission component for driving the overall movement of the seat cushion frame 200 via a hinge structure such as a pin, and the rear end 202 of the seat cushion frame 200 can be driven independently to achieve lifting. Optionally, when the control device of the seat 10 receives an instruction message to switch to the bed state, the control device can control the drive source so that the drive source can drive the rear end 202 of the seat cushion frame 200 to move, and the rear end 202 can rotate and lift around the front end 201 of the seat cushion frame 200.

[0105] Regarding the movement of the seat cushion frame 200 along the first trajectory and the movement of the rear end 202 of the seat cushion frame 200 along the second trajectory, the two movements can occur simultaneously in terms of timing. For example, during the process of the seat cushion frame 200 moving forward and upward, the rear end 202 of the seat cushion frame 200 simultaneously rotates and rises relative to the front end 201, thereby enabling a faster and more continuous transition to the bed posture. Alternatively, the movements of the first trajectory and the second trajectory can occur sequentially, or they can occur simultaneously only for a portion of the time. As an example, the control device can control the seat cushion frame 200 to first execute the movement of the first trajectory to make room for the folding of the backrest frame 100, and then independently drive the rear end 202 of the seat cushion frame 200 to execute the movement of the second trajectory to precisely eliminate the height difference between the two; or, the control device can also control the seat cushion frame 200 to first raise the rear end 202, and then move forward and upward as a whole. The specific relative timing of the movements of the first trajectory and the second trajectory is not limited in the embodiments of this application.

[0106] In the assembled bed state, the support surface of the backrest frame 100 and the support surface of the seat cushion frame 200 can be connected to each other. The angle difference between the included angle and the flat angle (i.e., a 180° flat angle) between these two support surfaces is controlled within a first angle range. This first angle range can be a small allowable tolerance range. By controlling the angle difference within the first angle range, the support surfaces of the backrest and seat cushion can achieve a seamless splicing effect that is close to or completely flat.

[0107] Through the technical solution of this application embodiment, the seat cushion frame 200 can simultaneously move forward and rise as a whole, while also independently rising at the rear end, thereby adaptively changing the tilt angle of the seat cushion surface. This structural action can effectively fill the stepped gap between the backrest and seat cushion after the backrest is folded down and the seat cushion is formed into a bed, eliminating the height difference between the seat cushion and the backrest, thus allowing the two to be smoothly spliced ​​together to form a comfortable bed surface that is nearly flat or absolutely flat, thereby improving the convenience of the seat 10 as a bed and enhancing the user experience of the occupants.

[0108] Optionally, such as Figure 1 As shown, in order to achieve the overall movement of the seat cushion frame 200, the seat 10 also includes a transmission assembly 400, which can be connected between the base 300 and the seat cushion frame 200. The transmission assembly 400 can be configured to drive the drive source 401. Figure 1 (Not shown in the image), under the drive of the drive source 401, the transmission assembly 400 can drive the seat frame 200 to move as a whole, that is, to move relative to the base 300 along a forward and upward trajectory. For example... Figure 2 As shown, in order to achieve independent movement of the rear end 202 of the seat cushion frame 200, the seat 10 also includes a transmission assembly 500, which can be connected between the transmission assembly 400 and the seat cushion frame 200. The transmission assembly 500 can be configured to connect to the drive source 501. Figure 2 (Not shown in the image), under the drive of the drive source 501, the transmission assembly 500 can drive the rear end 202 of the seat frame 200 to move along an upward trajectory relative to the front end 201 of the seat frame 200. For ease of distinction, the transmission assembly 400 and the transmission assembly 500 can be referred to as the first transmission assembly and the second transmission assembly, respectively, and the drive source 401 and the drive source 501 can be referred to as the first drive source and the second drive source, respectively.

[0109] In this embodiment, by setting independent drive sources 401 and 400, and drive sources 501 and 500, the physical structure of the overall forward lifting of the seat cushion frame 200 and the independent lifting of the rear end of the seat cushion frame 200 can be decoupled. This dual independent drive configuration means that the movement between the base 300 and the seat cushion frame 200 is no longer limited to a single, rigid mechanical linkage trajectory. The control device can individually or in combination according to a specific timing sequence call the two drive systems according to actual needs, thereby achieving high-precision control of the seat cushion's spatial position and pitch angle.

[0110] In some embodiments, when the seat 10 switches from a sitting position to a reclining position, the control device can achieve the overall movement of the seat cushion frame 200 by controlling only the drive source 401 and the transmission component 400; while when the seat 10 switches from a sitting position to a bed position, the control device can achieve the overall movement of the seat cushion frame 200 by both the drive source 401 and the transmission component 400, and the individual movement of the rear end 202 of the seat cushion frame 200 by the drive source 501 and the transmission component 500, so that the movement of the seat cushion frame 200 can well and flexibly meet the occupant's reclining position and bed position requirements.

[0111] Figure 3 This illustration shows a schematic diagram of a transmission assembly between the seat frame and the base provided in an embodiment of this application.

[0112] like Figure 3 As shown, the transmission assembly 400 for realizing the overall movement of the seat frame 200 may include a linkage mechanism 410, which may include a link 411, a link 412, and a link 413. For ease of distinction, the linkage mechanism 410 may be referred to as the first linkage mechanism, and the links 411, 412, and 413 may be referred to as the first link, the second link, and the third link, respectively.

[0113] Link 411 can extend along the depth direction of seat 10, seat cushion frame 200 ( Figure 3 (Not shown) can be connected to the link 411. The two ends of the link 412 are respectively hinged to the front end of the link 411 and the front end of the base 300. The two ends of the link 413 are respectively hinged to the rear end of the link 411 and the rear end of the base 300. At least one link in the linkage mechanism 410 is configured to drive a drive source 401, which can be used to drive multiple links in the linkage mechanism 410 to move together.

[0114] In this embodiment, when seated, the depth direction of seat 10 can correspond to the front-to-back length direction of seat 10, which can be aligned with the x-axis direction of the vehicle. For base 300 and link 411, the front end refers to the end near the occupant's knees, facing directly in front of the driving equipment; the rear end refers to the end near the backrest frame, away from the front.

[0115] In this embodiment, the base 300, connecting rods 411, 412, and 413 together constitute a highly stable four-bar linkage. In this four-bar linkage, the base 300 mounted on the vehicle body is equivalent to a fixed frame, connecting rod 411 is equivalent to a coupling rod, and connecting rods 412 and 413 are equivalent to a front rocker and a rear rocker, respectively.

[0116] Optionally, when the control device of the seat 10 receives an instruction message to switch from the seated state to the unfolded state, the drive source 401 transmits driving force to the linkage mechanism 410. Under the action of this driving force, the linkages 412 and 413, acting as rockers, rotate around their respective fixed hinge points at the front and rear ends of the base 300. Due to the rigid geometric constraints of the four-bar linkage, the co-rotation of the linkages 412 and 413 supports the upper linkage 411, causing the linkage 411 to move forward and lift in space. During this movement, the linkage 411 moves smoothly relative to the base 300 along a forward-facing and upward-lifting trajectory. Furthermore, since the seat cushion frame 200 can be connected to the linkage 411, the seat cushion frame 200 will synchronously follow the linkage 411 to execute a consistent linkage trajectory.

[0117] By introducing the aforementioned four-bar linkage design, this embodiment of the application can accurately convert the linear driving force of the drive source 401 into a composite displacement motion of the seat cushion frame 200, moving forward and upward. This mechanical action not only operates smoothly and reliably, but also provides ample physical clearance for the rearward rotation of the backrest frame, thereby effectively solving the problem of motion interference between the seat cushion and the backrest.

[0118] In some embodiments, such as Figure 3 As shown, the drive source 401 can be a lead screw motor assembly, which, for ease of distinction, can also be referred to as the first lead screw motor assembly. Specifically, this lead screw motor assembly can include a motor and a drive screw. The rotational motion of the motor is directly converted into the linear extension and retraction motion of the lead screw through the internal thread engagement, thereby smoothly pushing and pulling the connected linkage. The lead screw motor assembly not only has strong thrust, but the mechanical thread itself also has excellent self-locking characteristics, enabling it to stably maintain the current posture of the linkage mechanism 410 in any position when the seat adjustment is stopped, without requiring continuous power from the motor.

[0119] In addition, the drive source 401 can also be implemented in various alternative ways, such as hydraulic or pneumatic cylinder drive mechanism, linear motor (e.g., linear motor) drive mechanism, gear and rack drive mechanism, etc. This application embodiment does not specifically limit this. Optionally, besides using electric drive, hydraulic or pneumatic drive, the drive source in this application embodiment can also be a purely mechanical manual drive component, allowing the occupant to drive the links in the linkage mechanism 410 via a handle or similar device, thereby achieving overall drive of the seat cushion frame 200.

[0120] See also Figure 3 As shown, optionally, the transmission assembly 400 may include two linkage mechanisms 410, which are arranged along the width direction of the seat 10 on the base 300. The transmission assembly 400 may also include a drive link 420, which is connected between the two linkage mechanisms 410. The drive link 420 is configured to be connected to a drive source 401 so that the two linkage mechanisms 410 are transmissionally connected to the drive source 401 through the drive link 420. For ease of distinction, in various embodiments of this application, the drive link 420 may be referred to as the first drive link.

[0121] In this embodiment, the "width direction" of the seat 10 can refer to the horizontal extension direction perpendicular to the depth direction (i.e., the front-to-back direction) and the vertical height direction of the seat 10. This "width direction" can correspond to the left and right sides inside the driving device (such as a vehicle). Figure 3 The y-axis direction as shown in the coordinate system.

[0122] To improve the force balance and structural stability of the seat frame 200 during lifting, two linkage mechanisms 410 are respectively configured as a left and right four-bar linkage assembly, symmetrically mounted on the left and right sides of the base 300 along the width direction. The drive linkage 420 can act as a transverse rigid transmission beam, bridging and fixing between the linkage mechanisms 410 on both sides along the width direction (e.g., connecting between linkages 412, 411, or 413 on both sides). Through this physical connection, the two independent linkage mechanisms 410 can be mechanically integrated into a mutually constrained, synchronously operating rigid whole.

[0123] Optionally, when the control device of the seat 10 receives an instruction message to switch from the sitting state to the unfolded state, the drive source 401 transmits the driving force to the lateral drive linkage 420. The drive linkage 420 can evenly distribute the driving force to the left and right sides of the base 300. The two linkage mechanisms 410 on the left and right sides will move in the same way under the drive of the drive linkage 420, thereby driving the seat cushion frame 200 to move smoothly along a forward and upward trajectory.

[0124] The technical solution of this application adopts a drive architecture design with symmetrical arrangement on both sides and rigid coupling in the lateral direction, which can effectively reduce the phenomenon of left and right tilting, jamming or abnormal noise of the seat frame 200 during the overall lifting process, and improve the stability and reliability of the movement of the seat frame 200.

[0125] In some embodiments, such as Figure 3 As shown, the transmission assembly 400 may include two drive links 420, one of which can be connected between two links 413, and the other drive link 420 can be connected between two links 411. The drive source 401 may include a lead screw motor assembly, the two ends of which are rotatably connected to the two drive links 420 respectively.

[0126] In this embodiment, when the control device of the seat 10 receives an instruction message to switch from the seated state to the unfolded state, the control device can energize and start the lead screw motor assembly, and the motor drives the lead screw to perform linear extension and retraction. Since the two ends of the lead screw motor assembly can be hinged to two drive links 420 respectively, the extension or shortening of the lead screw will directly change the distance between the two lateral drive links 420. Driven by the lead screw motor assembly, the drive links 420 connected between the links 413 will push the left and right links 413 to rotate synchronously around the hinge point at the rear end of the base 300. Through the rigid geometric constraint transmission of the four-bar linkage, the rotation of the links 413 in the same direction supports the upper link 411 and drives the front link 412 to rotate forward and upward synchronously around the hinge point at the front end of the base 300. At the same time, the drive links 420 connected between the links 411 further ensure that the left and right links 411 remain parallel and balanced when pushed or pulled. During this dynamic movement, the connecting rods 411 on both sides can smoothly undergo a forward and upward overall translation in space. The seat frame 200, spanning and fixedly mounted on the two connecting rods 411... Figure 3 (Not shown in the image) can move relatively smoothly with the linkage 411.

[0127] The technical solution of this application embodiment utilizes a screw motor assembly arranged between two transverse drive links 420 to apply push and pull forces. This structure not only cleverly and fully utilizes the limited physical space under the seat cushion, but also enhances the overall strength and reliability of the seat cushion frame 200 during movement through strong bilateral physical constraints, thereby improving the performance of the seat 10.

[0128] exist Figure 3 Based on the illustrated embodiment, Figure 4 An exploded view of the seat frame and transmission assembly provided in an embodiment of this application is shown.

[0129] Combination Figure 3 and Figure 4 As shown, the transmission assembly 500 for realizing the movement of the rear end 202 of the seat cushion frame 200 may include a linkage mechanism 510, which may include a link 511 configured to drive the drive source 501. For ease of distinction, in various embodiments of this application, the link 511 may be referred to as the fourth link. One end of the link 511 may be hinged to the middle portion 203 or the rear end 202 of the seat cushion frame 200, and the other end of the link 511 may be hinged to the middle portion or the rear end of the link 411 in the linkage mechanism 410. The front end of the link 411 may be hinged to the front end 201 of the seat cushion frame 200.

[0130] Similar to drive source 401, in this embodiment, drive source 501 can also be a lead screw motor assembly. For ease of distinction, this lead screw motor assembly can also be referred to as a second lead screw motor assembly. Alternatively, drive source 501 can also be a hydraulic or pneumatic cylinder drive mechanism, a linear motor (e.g., a linear motor), a rack and pinion drive mechanism, or other drive mechanisms. Alternatively, drive source 501 can also be a purely mechanical manual drive assembly. This embodiment does not limit the specific type of drive source 501.

[0131] Optionally, when the control device of the seat 10 receives an instruction message to switch from the sitting state to the unfolded state (e.g., the bed state), it can control the drive source 501 to start, thereby driving the end of the linkage 511 to lift upward. Under the upward mechanical thrust of the linkage 511, the middle part 203 or the rear end 202 of the seat cushion frame 200 will be lifted. At this time, since the front end 201 of the seat cushion frame 200 is physically constrained by the hinge point with the linkage 411, it cannot move freely in the vertical direction. The upward lifting force applied by the linkage 511 will cause the seat cushion frame 200 to rotate upward about the hinge point of the front end 201. This rotational lifting action with the front end 201 as the center can better cause the rear end 202 of the seat cushion frame 200 to undergo an upward displacement relative to the front end 201 in the height direction, changing the pitch angle of the seat cushion support surface. In the bed-like state, this independent lifting action can precisely fill the stepped gap between the backrest and the seat cushion after the backrest is laid flat at a large angle, reducing or even eliminating the height difference between the seat cushion and the backrest, providing a decisive mechanical basis for forming a completely flat continuous bed.

[0132] In some embodiments, the transmission assembly 500 may include two links 511, which are respectively hinged to the two links 411 along the width direction of the seat 10. The transmission assembly 500 also includes a drive link 520, which can be connected between the two links 511. For ease of distinction, the drive link 520 may be referred to as the second drive link.

[0133] In this embodiment, the two connecting rods 511 can serve as the left and right lifting arms, respectively, symmetrically arranged on the left and right sides below the seat cushion frame 200. The drive connecting rod 520 acts as a laterally bridging rigid transmission beam, physically binding the two independent connecting rods 511 into a synchronously linked rigid whole. This bilaterally symmetrical and laterally coupled structural design allows the upward lifting force to be evenly distributed to the left and right sides of the rear end of the seat cushion frame 200. This structural design helps to enhance the torsional stiffness of the transmission frame, effectively reducing the left and right tilting, jamming, or uneven loading phenomena at the rear end of the seat cushion frame 200 due to unilateral force, thereby improving the stability of seat posture adjustment.

[0134] Optionally, the two connecting rods 511 are respectively hinged to the middle or rear end of the two connecting rods 411, and the front ends of the two connecting rods 411 are fixedly connected to the drive connecting rod 420. The drive source 501 may include a lead screw motor assembly, one end of which is fixedly connected to the drive connecting rod 420, and the other end is rotatably connected to the drive connecting rod 520 or the connecting rod 511.

[0135] In this embodiment, the drive link 420 can span between the front ends of the two links 411, providing a stable base for the rear lifting system of the seat frame 200. When the lead screw motor assembly, which is the drive source 501, receives a command to perform linear extension, the extension of its rear end, connected to the stable drive link 420, will drive the rear drive link 520 (or link 511) to move. Driven by the lead screw motor assembly, link 511 will rotate upward around its lower hinge point on link 411, thereby lifting the rear end 202 of the seat frame 200.

[0136] By arranging the drive source 501 among the internal linkage mechanisms through the technical solution of this embodiment, it is avoided that the drive source 501 is anchored downwards to the base 300. On the one hand, this arrangement helps to save vertical physical space under the seat cushion and prevents spatial interference with other tracks or frames at the bottom; on the other hand, the drive source 501 and the transmission component 500 can move with the transmission component 400. No matter where the seat cushion frame 200 moves as a whole under the drive of the transmission component 400, the drive source 501 can move as a whole, always maintaining a better driving angle, which is conducive to precise and efficient adjustment of the height of the rear end 202 of the seat cushion frame 200.

[0137] Optionally, such as Figure 3 and Figure 4As shown, one end of the connecting rod 511 can be hinged to the middle 203 of the seat cushion frame 200, and the other end of the connecting rod 511 can be hinged to the middle of the connecting rod 411. This arrangement, on the one hand, allows for more space at the rear edge of the seat cushion frame 200, reducing the possibility of physical interference between the connecting rod 511 and the drive source 501 and other components, such as the backrest frame 100, the transmission assembly 400, and the drive source 401; on the other hand, in terms of force transmission, compared to applying the thrust directly to the rear end 202 of the seat cushion frame 200, moving the force fulcrum forward to the middle 203 significantly shortens the cantilever arm. When the connecting rod 511 provides an upward lifting force, the force distribution on the front and rear of the seat cushion frame 200 is more even. This not only reduces the risk of bending deformation of the rear end 202 of the seat cushion frame 200, but also enhances the anti-eccentric load capacity of the rear end 202 of the seat cushion frame 200 during independent lifting, thereby improving the stability and reliability of the seat posture switching.

[0138] Figure 5 A schematic diagram of yet another seat provided in an embodiment of this application is shown. Wherein, Figure 5 Part (a) shows a schematic diagram of the seat in the seated position. Figure 5 Part (b) shows an intermediate schematic diagram of the seat during state transition. Figure 5 Section (c) shows a schematic diagram of the seat in its bed configuration.

[0139] like Figure 5 As shown, in addition to the backrest frame 100, seat cushion frame 200, base 300, transmission assembly 400, and transmission assembly 500, the seat 10 may further include a side wing frame 600, which is movably connected to the backrest frame 100. In this embodiment, the side wing frame can be an internal rigid support structure on both sides of the seat back for supporting the occupant's shoulders, back sides, and arm areas. Its exterior is typically covered with soft sponge and a cover to form side wings.

[0140] During the transition of seat 10 from a seated state to an unfolded state (e.g., a bed-like state), the movement of the side wing frame 600 and the backrest frame 100 is asynchronous for at least a portion of the time. Specifically, the side wing frame 600 and the backrest frame 100 are inconsistent in at least one of the following motion parameters, resulting in asynchronous movement: start time, movement speed, movement distance, stop time, movement sequence, and movement type. During at least a portion of the transition of seat 10 from a seated state to an unfolded state, the movement rhythms of the side wing frame 600 and the backrest frame 100 are misaligned, their movement trajectories are separated, and they are not synchronized. In some embodiments, the movement types of the side wing frame 600 and the backrest frame 100 may be different, resulting in asynchronous movement; for example, the backrest frame 100 performs a large-angle rotational movement, while the side wing frame 600 performs translation in addition to rotation, or their rotation axes and spatial movement dimensions do not coincide. In other embodiments, for example, the side wing frame 600 and the backrest frame 100 may move in the same way, but they are not always in a rigidly bound state of relative stillness. Instead, there may be various asynchronous movements, such as one moving first and the other moving later, or the two moving at different speeds.

[0141] Optionally, in the unfolded state (e.g., in bed-like state), the side wing frame 600 is separated from the vehicle's side structure. Traditional fixed side wings, when rotating rearward with the backrest, are prone to physical interference with the gradually narrowing rear body structure (such as the C-pillar or wheel arches). However, based on the asynchronous movement design of the side wing frame 600 and the backrest frame 100, the side wing frame 600 can actively avoid the vehicle's side structure during movement. This allows the side wing surface of the seat 10 to maintain a safe clearance from the vehicle's side structure after unfolding, thus reducing the risk of scratches during seat posture adjustment and giving the seat 10 better cabin layout compatibility.

[0142] In some embodiments, the bottom end of the side wing frame 600 is rotatably connected to the bottom end of the backrest frame 100. During the process of the seat 10 switching from a sitting state to an unfolded state (e.g., a bed state), the rotational movements of the side wing frame 600 and the backrest frame 100 are not synchronized for at least a portion of the time.

[0143] Optionally, such as Figure 5As shown, during the transition of the seat 10 from a sitting position to a bed position, the side wing frame 600 can rotate backward along with the backrest frame 100 by a first angle. As the backrest frame 100 continues to rotate from the first angle to a second angle, the side wing frame 600 can disengage from the backrest frame 100. Here, the first angle can be an intermediate range of backward rotation angles for the backrest frame 100 during the transition from a normal sitting position to a bed position; the second angle can be the range of backward rotation angles for the backrest frame 100 during the transition from a normal sitting position to a reclining position or a bed position, and this second angle is greater than the first angle.

[0144] In some embodiments, a mechanical locking mechanism or an electromagnetic clutch may be configured between the side wing frame 600 and the backrest frame 100 in terms of structural arrangement. When the backrest frame 100 rotates backward within a first angular range, the locking mechanism is locked, so that the side wing frame 600 and the backrest frame 100 remain rigidly bound together, and the two rotate backward synchronously as a whole; when the backrest frame 100 rotates backward beyond the threshold of the first angle and continues to rotate towards the second angle, the mechanical trigger inside the backrest will release the locking mechanism, or the posture sensor of the seat will trigger the control device to disengage the electromagnetic clutch, thereby releasing the mechanical binding between the side wing frame 600 and the backrest frame 100, and the side wing frame 600 will no longer be forced to follow the backrest frame 100 in backward movement.

[0145] Optionally, as the backrest frame 100 continues to rotate from the first angle to the second angle, the side wing frame 600 can rotate forward from the first angle to a third angle, or the side wing frame 600 can remain stationary. This third angle can be smaller than the first angle.

[0146] In some embodiments, the forward movement of the side wing frame 600 can be achieved by additionally configuring an independent side wing drive motor for the side wing frame 600. When the side wing frame 600 is decoupled from the backrest frame 100, the side wing drive motor starts to operate, actively pushing the side wing frame 600 forward by a certain angle compensation.

[0147] The side wing frame 600 and the backrest frame 100 can be used in addition to Figure 5Besides the movement method shown in the embodiment, other methods can be used to make the rotational movements of the two components asynchronous. In some alternative embodiments, the side wing frame 600 and the backrest frame 100 can move at different rotational angular velocities. During the process of the backrest frame 100 reclining at a large angle, the angular velocity of the side wing frame 600 rotating backward is always less than that of the backrest frame 100. This continuous difference in angular velocity also results in the side wing frame 600 exhibiting a forward-opening spatial posture relative to the main plane of the backrest in the final bed state, thereby freeing up space in the width direction. In other alternative embodiments, the backrest frame 100 and the side wing frame 600 move at different times. For example, after receiving the instruction information for changing the seat posture, the backrest frame 100 first rotates backward to recline, while the side wing frame 600 remains relatively stationary in the initial stage until the backrest frame 100 rotates backward to reach a certain preset physical angle threshold, at which point the side wing frame 600 is triggered to start rotating backward or forward. This staggered start constitutes asynchronous rotational movement. In some alternative embodiments, the backrest frame 100 and the side wing frame 600 are independently controlled in terms of start-up time, rotational angular velocity, motion stroke and even rotational direction, thereby achieving any desired asynchronous spatial posture with greater precision.

[0148] Optionally, in the unfolded state (e.g., in a bed-like state), the angle between the side wing frame 600 and the seat cushion frame 200 is a first angle, and the angle between the backrest frame 100 and the seat cushion frame 200 is a second angle, where the first angle is smaller than the second angle. In some embodiments, in the bed-like state, the second angle can be close to 180°, and the side wing frame 600 can present an obtuse or acute angle relative to the seat cushion frame 200. This spatial posture setting, where the first angle is smaller than the second angle, allows the backrest frame 100 to be laid flat to provide longitudinal sleeping space, while the side wings on both sides are moderately tilted forward relative to the main plane of the backrest, thereby freeing up a great deal of lateral space for occupants in the width direction (y-axis direction) of the vehicle interior. This design effectively alleviates the cramped and squeezed feeling on the occupants' arms and shoulders caused by the traditional fixed side wings rotating backward with the backrest, and better improves the spaciousness and riding comfort of occupants in a relaxed posture.

[0149] Figure 6 A schematic diagram of yet another seat provided in an embodiment of this application is shown.

[0150] like Figure 6As shown, in addition to the backrest frame 100, seat cushion frame 200, base 300, transmission assembly 400, transmission assembly 500, and side wing frame 600, the seat 10 may further include a footrest frame 700, which is movably connected to the seat cushion frame 200. The footrest frame may be an internal movable support member located below the front of the seat cushion, primarily used to support the occupant's lower legs.

[0151] During the transition of the seat 10 from the seated state to the unfolded state, the footrest frame 700 can move along a forward and upward trajectory relative to the base 300. For ease of distinction, this forward and upward trajectory of the footrest frame 700 relative to the base 300 can be referred to as the third trajectory.

[0152] Optionally, the rear end of the footrest frame 700 can be rotatably connected to the lower front end of the seat cushion frame 200, and is equipped with an independent footrest drive source and related transmission components. When the control device of the seat 10 receives an instruction to switch the seat to an unfolded state (such as a bed state or a reclining state), the control device can control the footrest drive source so that the footrest drive source drives the transmission components to flip the footrest frame 700 forward and upward around its hinge point with the seat cushion frame 200 to form a third trajectory.

[0153] Based on this technical solution, by setting up a movable footrest frame 700, it can be folded down in front of the seat cushion to save legroom during normal sitting. When switching to a reclining or bed-like position, the footrest frame 700 is raised and unfolded forward, providing stable and comfortable support for the occupant's lower legs and feet. In the bed-like position, the raised, horizontal footrest surface can smoothly connect with the seat cushion surface, which helps to further extend the effective support area of ​​the seat in the longitudinal dimension, providing an excellent structural support foundation for providing a deep, nearly flat, and spacious bed surface.

[0154] The above text combined Figures 1 to 6 This application describes the technical solutions related to the movement of the backrest frame 100, seat cushion frame 200, side wing frame 600, and footrest frame 700 of the seat 10 during state switching. This application also provides technical solutions related to the movement of the headrest during seat 10 state switching, which can also improve the performance of the seat 10 and the user experience of the occupants.

[0155] In some embodiments, the seat 10 may include a headrest body 13 movably connected to the top of the backrest frame 100 and configured to move relative to the top of the backrest frame 100. The top of the backrest frame 100 is the end furthest from the seat cushion frame 200 and closest to the occupant's head. The headrest body 13 is the component in the seat that directly contacts and supports the occupant's head or neck, typically including an internal support structure and an external soft covering layer. Configuring the headrest body 13 to move relative to the top of the backrest frame 100 allows for posture adjustment, not only facilitating adaptation to the overall posture adjustment of the seat 10 but also meeting other personalized needs of the occupant.

[0156] Optionally, during the transition of the seat from a seated state to an unfolded state, and / or, in the unfolded state, the headrest body 13 can move relative to the top of the backrest frame 100 along the length direction of the backrest frame 100, and / or along the thickness direction of the backrest frame 100. Here, the length direction of the backrest frame 100 can be the direction in which the backrest frame 100 extends from the bottom to the top. When the backrest frame 100 is reclined flat, its length direction can correspond to the longitudinal extension direction of the entire bed surface. The thickness direction of the backrest frame 100 can be the normal direction perpendicular to the support surface of the backrest where the backrest frame 100 is located. When the backrest frame 100 is reclined flat, its thickness direction can be the height direction perpendicular to the bed surface upwards. The length direction of the backrest frame 100 is the same as the length direction of the backrest where it is located, and the thickness direction of the backrest frame 100 is the same as the thickness direction of the backrest where it is located.

[0157] As an example, Figure 7 A schematic diagram of a headrest for a seat provided in an embodiment of this application is shown. Figure 7 Part (a) shows a schematic diagram of the seat in the seated position. Figure 7 Sections (b) and (c) show schematic diagrams of the seat in its bed configuration.

[0158] like Figure 7 As shown, the seat 10 may include a backrest 11, a seat cushion 12, and a headrest body 13. The backrest 11 may include the backrest frame 100 as described in any embodiment of this application, and the backrest frame 100 may be located inside the backrest 11; the seat cushion 12 may include the seat cushion frame 200 as described in any embodiment of this application, and the seat cushion frame 200 may be located inside the seat cushion 12. For example... Figure 7 As shown in part (b), in the assembled bed state, the headrest body 13 moves outward (i.e., away from the top of the backrest 11) along the length of the backrest 11, extending the effective length of the bed surface forward, thereby improving the occupant's user experience. Figure 7As shown in part (c), in the bed-like state, the headrest body 13 can be adjusted upward along the thickness direction of the backrest 11 so that it can directly protrude from the flat bed surface. In the bed-like state, the headrest body 13 can directly serve as a pillow for rest, which helps to eliminate the cumbersome operation of additional configuration and laying of air mattress or pillow when passengers are in bed in the vehicle.

[0159] In some embodiments, during the transition of the seat from a seated state to an unfolded state, and / or, in the unfolded state, the headrest body 13 may be flipped relative to the top of the backrest frame 100.

[0160] As an example, Figure 8 A schematic diagram of the headrest of another seat provided in an embodiment of this application is shown. Figure 8 Part (a) shows a schematic diagram of the seat in the seated position. Figure 8 Section (b) shows a schematic diagram of the seat in its bed configuration.

[0161] like Figure 8 As shown, compared to the sitting position, in the bed position, the headrest body 13 folds up, with its bottom surface facing upwards, becoming the support surface. The headrest body 13 can change from an upright position to a flat position. The bottom surface of the headrest body 13 can be the end face facing the ground (or the top of the backrest 11) when the seat 10 is in the upright sitting position. After folding down, this bottom surface flips upwards, forming a continuous large surface together with the support surface of the backrest 11.

[0162] Optionally, in the unfolded state of the seat 10, such as in the bed state, the height difference between the supporting surface of the headrest body 13 and the supporting surface of the backrest 11 is within a first height range. In this embodiment, the height difference between the supporting surface of the headrest body 13 and the supporting surface of the backrest 11 can be a physical quantity used to measure the flatness of the splicing position of the two in the unfolded state (for example, the vertical distance between the horizontal planes where the highest protrusions of the two are located). The first height range can be the allowable tolerance range of the height difference. The first height range can be a range value preset according to the needs of the occupants or the vehicle configuration, and it can be fixed or dynamically changed. In some embodiments, the first height range can be close to zero; or, in other embodiments, when the headrest body 13 can move along the thickness direction of the backrest frame 100, the first height range can be a numerical range (e.g., tens of millimeters) that meets the ergonomic neck support requirements, so that the protruding headrest body 13 can directly serve as a pillow for sleeping. This embodiment does not limit the specific value of the first height range.

[0163] Figure 9 A schematic diagram of yet another seat provided in an embodiment of this application is shown. Wherein, Figure 9 Parts (a) and (b) are both schematic diagrams of the seat in a seated position, but the posture of the headrest body is different.

[0164] like Figure 9 As shown in this embodiment, the headrest body 13 can be folded up relative to the top of the backrest frame 100 / backrest 11 when the seat 10 is in the sitting position. This helps to reduce the height of the headrest body 13, thereby effectively avoiding the vertical headrest body from obstructing the view, significantly improving the in-vehicle visibility (e.g., improving the forward view of rear passengers or the rearward view of the driver's rearview mirror), and visually making the cabin space appear more open and spacious.

[0165] Optionally, such as Figures 7 to 9 As shown, in some embodiments, a headrest rod 14 may be provided at the top of the backrest frame 100 / backrest 11. The first end of the headrest rod 14 may be connected to the backrest frame 100 in the backrest 11, and the headrest body 13 may be movably disposed at the second end of the headrest rod 14. The headrest body 13 may include a first state and a second state, wherein, in the first state, the headrest body 13 may be locked to the second end of the headrest rod 14. In the second state, the headrest body 13 is unlocked from the second end of the headrest rod 14 and moves relative to the second end. In the embodiments of this application, the headrest rod 14 refers to a rigid support structure that physically connects the headrest body 13 and the backrest 11 (specifically, the internal backrest frame 100). The first end (e.g., the bottom end) of the headrest rod 14 is inserted into and connected to the top of the backrest frame 100, while the second end (e.g., the top end) of the headrest rod 14 provides a fixed base for the headrest body 13 to be movably connected and locked.

[0166] In some embodiments, when the seat 10 is in a seated state, the headrest body 13 may be in a first state and / or a second state. During the transition from the seated state to the unfolded state, and / or, in the unfolded state, the headrest body 13 may be in the second state. When the seat 10 is in a seated state and the headrest body 13 is in the first state, during the transition from the seated state to the unfolded state, and / or, in the unfolded state, the headrest body 13 may switch from the first state to the second state.

[0167] In the first state, the headrest body 13 is securely locked to the second end of the headrest rod 14, maintaining an upright posture to provide conventional head protection. In the second state, the internal mechanical locking mechanism of the headrest body 13 unlocks, allowing the headrest body 13 to be released from restraint and move. This movement of the headrest body 13 relative to the second end of the headrest rod 14 can include, for example... Figure 7 The translational motion shown, and / or, Figures 8 to 9 The flipping motion shown.

[0168] The following is combined Figure 10 and Figure 11 The technical solutions for the flipping motion of the headrest body 13 relative to the second end of the headrest rod 14 provided in the embodiments of this application will be described.

[0169] Figure 10 A schematic diagram of the headrest body and headrest rod provided in an embodiment of this application is shown. Wherein, Figure 10 Part (a) shows a schematic diagram of the back of the headrest body. Figure 10 Part (b) shows a schematic diagram of the interior of the headrest body.

[0170] like Figure 10 As shown, during the transition of the seat 10 from a sitting position to a bed position, the headrest body 13 can rotate relative to the second end of the headrest rod 14 in the direction F shown in the figure. A drive source 130 may be provided on the headrest body 13, which may include a manual drive component, for example... Figure 10 The drive source 130, as illustrated, may include an operating component 1301 for occupant operation and a cable 1302 disposed inside the headrest body 13. The occupant can use the operating component 1301 to actuate the cable 1302, thereby applying external force to a mechanical locking mechanism inside the headrest body 13 to unlock the mechanism. For ease of distinction, drive source 130 may be referred to as a third drive source.

[0171] Optionally, when the drive source 130 includes a manual drive component, it may include, in addition to the operating element 1301 and the cable 1302, physical components such as buttons, paddles, or mechanical linkages for assisting in transmitting operating force. Optionally, in addition to the manual drive component, the drive source 130 may also include an electric drive component, a hydraulic or pneumatic drive component, etc. The embodiments of this application do not limit the specific implementation of the drive source 130.

[0172] To facilitate understanding of the locking and unlocking between the headrest body 13 and the second end of the headrest rod 14, as well as the flipping mechanism of the headrest body 13, Figure 11 It shows Figure 10 A magnified view of region A in part (b).

[0173] like Figure 11 As shown, the second end of the headrest rod 14 may be provided with a fixed tooth 142, and the headrest body 13 is provided with a movable tooth 132. When the seat is in the sitting position, the fixed tooth 142 and the movable tooth 132 mesh with each other, so that the headrest body 13 and the second end of the headrest rod 14 are locked together. Optionally, as shown... Figure 11As shown, the second end of the headrest rod 14 is provided with a fixing rod 141 extending along the width direction of the seat 10 (the y-axis direction shown in the figure), and the fixed tooth 142 can be fixedly installed on the fixing rod 141.

[0174] Optionally, the moving gear 132 and the drive source 130 (e.g.) Figure 11 A transmission mechanism (which can be referred to as the first transmission mechanism for ease of distinction) is also provided between the cables 1302 shown. Driven by the drive source 130, this transmission mechanism can drive the movable tooth 132 to move, causing the movable tooth 132 to unlock onto the fixed tooth 142, thereby unlocking the headrest body 13 onto the second end of the headrest rod 14. In some embodiments, such as... Figure 11 As shown, the transmission mechanism may include a rotating rod 133 extending along the width direction of the seat 10. The rotating rod 133 is rotatably connected to the headrest body and is fixedly connected to the movable gear 132. Under the drive of the drive source 130, the rotating rod 133 rotates to drive the movable gear 132 to move.

[0175] In some embodiments, the drive source 130 may further include an unlocking handle 1303 connected between the pull cable 1302 and the rotating rod 133. The unlocking handle 1303 facilitates the rotation of the rotating rod 133. Optionally, the rotating rod 133 may be further provided with an elastic element, which may include, for example, a torsion spring 134 sleeved on the rotating rod 133. The torsion spring 134 facilitates providing a reverse restoring force after the occupant releases the operating member 1301, driving the rotating rod 133 to automatically reset, for example, driving the rotating rod 133 back to its initial default angle. This reset process can restore the external operating member 1301 to a flat and tight initial retracted state through the reverse linkage of the pull cable 1302, preventing the pull cable 1302 from loosening or the operating member 1301 from dangling loosely on the headrest surface. Furthermore, when the occupant finishes resting and manually pulls the headrest body 13 from the reclining position back to the upright position, the torsion spring 134 will drive the rotating rod 133 and the moving gear 132 to re-engage with the fixed gear 142. Once the headrest body 13 is pulled back to the upright position, the elasticity of the torsion spring 134 will cause the moving gear 132 to automatically engage with the fixed gear 142. This design allows the occupant to automatically lock the headrest body 13 by simply pushing it, without having to pull the operating mechanism to engage the mechanical locking mechanism while pushing the headrest body 13, thus improving the convenience of seat restoration.

[0176] In this embodiment, the locking mechanism formed by the moving tooth 132 and the fixed tooth 142, and the transmission mechanism formed by the rotating rod 133, can effectively achieve rigid locking of the headrest body 13 and effectively resist multi-dimensional impact forces. At the same time, the gear meshing form combined with the rotating linkage transmission makes full use of the narrow space inside the headrest, making the unlocking action more agile and the mechanical structure highly compact, which greatly improves the reliability of the headrest posture switching.

[0177] In other embodiments, the locking structure can employ not only moving teeth and fixed teeth, but also locking pins and pinhole mechanisms, ratchet and pawl structures, or high-strength friction plate locking mechanisms, etc. This application does not limit the specific type of locking structure. The drive source and transmission mechanism can employ not only cables, unlocking handles, and rotating rods, but also drive motors and gear sets, electromagnet-driven push rod mechanisms, or micro-pneumatic push rod assemblies based on fluid pressure, etc., thereby achieving an electrically unlocked intelligent flip headrest.

[0178] See also Figure 11 As shown, in some embodiments, after the headrest body 13 is unlocked from the second end of the headrest rod 14, the flipping movement of the headrest body 13 can be achieved by an elastic element. As an example, Figure 11 A torsion spring 131 fitted onto a fixing rod 141 is shown. The headrest body 13 is provided with a connecting portion 135, which may have a through hole for the fixing rod 141 to pass through. The two ends of the torsion spring 131 can be respectively connected to the two ends of the connecting portion 135 in the depth direction of the seat (the x-axis direction shown in the figure). Thus, when the headrest body 13 is in the vertical locked state, the torsion spring 131 can be in a torsional state to accumulate elastic potential energy; when the moving tooth 132 is mechanically unlocked from the fixed tooth 142, the torsion spring 131 releases its accumulated elastic potential energy, driving the headrest body 13 forward around the fixing rod 141 (i.e., Figure 10 (F-direction) Flip-over. This design allows the headrest body 13 to smoothly and automatically fold from an upright position to a lying position without the occupant needing to apply additional pushing force, greatly simplifying the bed-making process and improving ease of use. Optionally, once the headrest body 13 has finished flipping into the lying position, the internal moving gear 132 can completely disengage from the engagement range of the fixed gear 142, and the locking mechanism is ineffective at this time. At this point, the torsion spring 131 is still in a torsional state and continues to provide a downward pressing force. Furthermore, in conjunction with the mechanical hard-limiting structure inside the headrest body 13, the downward pressing force provided by the torsion spring 131 helps to firmly "press" the headrest body 13 onto a plane with a small height difference from the backrest surface. This helps prevent the headrest body 13 in the lying position from easily tilting, loosening, or rebounding when supporting the weight of the human body or encountering vehicle bumps.

[0179] In other embodiments, the flipping motion of the headrest body 13 can also be achieved by a drive source, or a drive source and a transmission assembly.

[0180] The headrest body 13 is translated relative to the second end of the headrest rod 14 (i.e. Figure 7 In some embodiments, the seat 10 may include a transmission mechanism connected to the headrest body and the drive source. The drive source and transmission mechanism cooperate to achieve translational movement of the headrest body 13. For ease of distinction, the drive source may be referred to as the fourth drive source, and the transmission mechanism as the second transmission mechanism. Driven by the fourth drive source, the second transmission mechanism can drive the headrest body 13 to move relative to the second end of the headrest rod 14 along the length direction of the backrest 11, and / or along the thickness direction of the backrest 11.

[0181] In some embodiments, the fourth drive source may include multiple motors or a multi-directional motor, and the second transmission mechanism may include a miniature lead screw and nut transmission assembly, a gear and rack sliding rail assembly, or a cross scissor linkage mechanism connected to the motor output shaft. When this electrically adjustable four-way headrest solution is adopted, the motor can control the headrest body 13 to extend outward along the length direction of the backrest and / or protrude along the thickness direction of the backrest through the transmission assembly, meeting the diverse rest needs of passengers and helping to solve the pain point of needing to configure additional pillows for in-vehicle beds.

[0182] In the above embodiments, the relevant technical solutions for switching the seat 10 from a sitting state to an unfolded state (e.g., a bed state or a reclining state) are mainly introduced. During the process of the seat 10 switching back from the unfolded state to the sitting state, the movement trajectories of each movable part inside the seat 10 are basically opposite to the unfolding process described above.

[0183] Specifically, when the control device receives an instruction to restore the seating position, it can control the backrest frame 100 to rotate forward (or stand up and reset). Simultaneously or sequentially, it controls the rear end 202 of the seat cushion frame 200 to lower and reset, causing the entire seat cushion frame 200 to move rearward and downward to reset to the initial seating position, thereby eliminating the displacement difference between the first and second tracks. Furthermore, the footrest frame 700 can rotate rearward and downward to fold in front of or below the seat cushion frame 200. The side wing frame 600 can rotate forward or backward and re-align with the backrest frame 100. The headrest body 13 can be manually folded by the occupant or driven by a drive mechanism to re-securely lock onto the top of the backrest frame 100, for example, by locking onto the second end of the headrest rod 14. Through the coordinated reverse reset actions of the aforementioned components, the seat 10 can smoothly and quickly return from the unfolded state to the seating state, thus better meeting the dynamic space switching needs of the occupant in different scenarios.

[0184] In this embodiment, when the seat 10 is simultaneously equipped with a seat cushion frame 200, a headrest body 13, a side wing frame 600, and a footrest frame 700, the seat 10 can form a high-level intelligent architecture that can be folded into a bed. The synergistic interaction of these four components can bring about the following technical effects.

[0185] (1) Creating a “seamless flat bed”. The seat cushion frame 200 is moved forward as a whole and the rear end is raised independently, which helps to eliminate the height difference between the seat cushion and the backrest; the footrest frame 700 is raised forward to connect with the front end of the seat cushion; the headrest body 13 folds down to lie flat (or moves electrically) and connects to the top of the backrest to extend the effective length. The four parts are spliced ​​together to create a seamless flat bed surface with sufficient depth, so that passengers can get a better lying experience without removing the headrest or laying an air mattress.

[0186] (2) Improve the comfort and spaciousness of passengers in the reclining position. In the fully reclining or bed-like position, the forward movement and lifting of the seat cushion frame 200 can effectively reduce the "back pain" caused by the deep reclining of the backrest; the side wing frame 600 is decoupled from the backrest frame 100 and rotates forward appropriately, which helps to release the width space of the seat and reduce the lateral pressure on the passenger's arms; together with the footrest frame 700 to provide stable support for the lower legs, it helps to improve the passenger's riding experience in all aspects.

[0187] (3) Optimize the cabin space layout and reduce physical interference. In the longitudinal and vertical space, the forward movement and lifting of the seat cushion frame 200 actively creates space for the large-angle rotation of the backrest; in the lateral space, the side wing frame 600 is decoupled from the backrest frame 100 and rotates forward moderately, which helps to avoid narrowing body structures (such as wheel hubs). The combination of these two follow-up avoidance mechanisms can reduce the risk of physical collision with the vehicle body when adjusting the seat posture.

[0188] This application also provides a control method. This control method can be used to control the seat 10 provided in any of the above embodiments. The executing entity of this control method can be a control device.

[0189] Figure 12 A schematic diagram of a control method provided in an embodiment of this application is shown.

[0190] like Figure 12 As shown, control method 20 may include the following steps.

[0191] S21, Obtain instruction information, which is used to instruct the seat to switch from the seated state to the unfolded state.

[0192] S22, according to the instruction information, control the backrest frame of the seat to rotate backward relative to the base, and the seat cushion frame to move along a first trajectory that faces forward and rises upward relative to the base.

[0193] Optionally, the instruction information can be generated by the occupant through interactive methods such as triggering physical buttons, operating the in-vehicle central control screen interface, or issuing voice commands. In addition, the instruction information can also be automatically generated based on detection information from driving equipment (such as the vehicle). For example, when sensors or cameras installed in the vehicle detect specific hand gestures, specific posture changes, or when the vehicle detects that the occupant is fatigued, the vehicle's system can automatically generate the instruction information based on the aforementioned detection information.

[0194] In some embodiments, the unfolded state includes the bed-like state; the control method 20 may further include: controlling the rear end of the seat cushion frame to move along an upwardly lifting second trajectory relative to the front end of the seat cushion frame according to the instruction information.

[0195] In this embodiment, the backrest frame can be the backrest frame 100 in any of the embodiments above, and the seat cushion frame can be the seat cushion frame 200 in any of the embodiments above. The specific movement mode and mechanical linkage logic of the backrest frame 100 and the seat cushion frame 200 can be found in the relevant description of the device embodiments above, and will not be elaborated further here.

[0196] In some embodiments, the control method 20 further includes: controlling the movement of the side wing frame of the seat according to the instruction information, wherein the movement of the side wing frame is asynchronous with the movement of the backrest frame for at least a portion of the time.

[0197] Optionally, the bottom end of the side wing frame is rotatably connected to the bottom end of the backrest frame; wherein controlling the movement of the side wing frame of the seat includes: controlling the rotational movement of the side wing frame, wherein the rotational movement of the side wing frame is not synchronized with the rotational movement of the backrest frame for at least a portion of the time.

[0198] Optionally, controlling the rotational movement of the side wing frame includes: controlling the side wing frame to rotate backward by a first angle following the backrest frame; controlling the backrest frame to continue rotating from the first angle to a second angle, wherein the side wing frame and the backrest frame are decoupled.

[0199] Optionally, the control method 20 further includes: controlling the flank frame to rotate forward by a third angle from a first angle.

[0200] In the above embodiments, the side wing frame can be the side wing frame 600 in any of the embodiments above. Its movement mode and avoidance logic can be referred to the relevant description of the device embodiments above, which will not be elaborated here.

[0201] In some embodiments, the control method 20 further includes: controlling the headrest body of the seat to move relative to the top of the backrest frame according to the instruction information.

[0202] Optionally, controlling the movement of the headrest body of the seat relative to the top of the backrest frame includes: controlling the headrest body to move along the length direction of the backrest frame relative to the top of the backrest frame, and / or, along the thickness direction of the backrest frame.

[0203] Optionally, controlling the movement of the headrest body of the seat relative to the top of the backrest frame includes: controlling the headrest body to flip relative to the top of the backrest frame.

[0204] In the above embodiments, the headrest body can be the headrest body 13 in any of the embodiments above, and its movement mode can be referred to the relevant description of the device embodiments above, which will not be elaborated here.

[0205] In some embodiments, the control method 20 further includes: controlling the footrest frame of the seat to move relative to the base along a third trajectory that faces forward and rises upward, according to the instruction information. The footrest frame may be the footrest frame 700 in any of the embodiments described above.

[0206] Figure 13 A schematic diagram of a control device provided in an embodiment of this application is shown.

[0207] like Figure 13 As shown, the control device 30 may include an acquisition module 31 and a control module 32. The acquisition module 31 acquires indication information to instruct the seat to switch from a seated state to an unfolded state. The control module 32, based on the indication information, controls the seat back frame to rotate rearward relative to the base, and the seat cushion frame to move relative to the base along a first trajectory that faces forward and rises upward.

[0208] In some embodiments, the control module 32 can also be used to control the rear end of the seat cushion frame to move along an upwardly lifting second trajectory relative to the front end of the seat cushion frame according to the instruction information.

[0209] In some embodiments, the control module 32 can also be used to control the movement of the side wing frame of the seat according to the instruction information, wherein the movement of the side wing frame is asynchronous with the movement of the backrest frame at least for a portion of the time.

[0210] Optionally, the bottom end of the side wing frame is rotatably connected to the bottom end of the backrest frame; the control module 32 is used to control the rotational movement of the side wing frame, wherein the rotational movement of the side wing frame is not synchronized with the rotational movement of the backrest frame for at least a portion of the time.

[0211] Optionally, the control module 32 can be used to control the side wing frame to rotate backward by a first angle following the backrest frame; and to control the backrest frame to continue rotating from the first angle to a second angle, wherein the side wing frame and the backrest frame are decoupled.

[0212] Optionally, the control module 32 is also used to control the wing frame to rotate forward from the first angle to a third angle.

[0213] In some embodiments, the control module 32 can also be used to control the movement of the headrest body of the seat relative to the top of the backrest frame according to the instruction information.

[0214] Optionally, the control module 32 can be used to control the headrest body to move relative to the top of the backrest frame along the length direction of the backrest frame, and / or, along the thickness direction of the backrest frame.

[0215] Optionally, the control module 32 can be used to control the top of the headrest body to flip relative to the backrest frame.

[0216] In some embodiments, the control module 32 can also be used to control the footrest frame of the seat to move relative to the base along a third trajectory that faces forward and rises upward, according to the instruction information.

[0217] Figure 14 A schematic diagram of another control device provided in an embodiment of this application is shown.

[0218] like Figure 14 As shown, the control device 40 includes a memory 41, a processor 42, and a communication interface 43. The memory 41, processor 42, and communication interface 43 are connected via an internal connection path. The memory 41 stores instructions, and the processor 42 executes the instructions stored in the memory 41 to control the communication interface 43 to acquire information, thereby enabling the control device 40 to implement the aforementioned control method. Optionally, the memory 41 can be coupled to the processor 42 via an interface, or it can be integrated with the processor 42.

[0219] It should be noted that the communication interface 43 described above uses a transceiver device, such as, but not limited to, a transceiver. The communication interface 43 may also include an input / output interface.

[0220] The processor 42 stores one or more computer programs, which include instructions. When the instructions are executed by the processor 42, the control device 40 performs the control methods described in the above embodiments.

[0221] In implementation, each step of the above method can be completed by the integrated logic circuits in the hardware of the processor 42 or by instructions in software form. The method disclosed in the embodiments of this application can be directly implemented by a hardware processor, or by a combination of hardware and software modules in the processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory 41, and the processor 42 reads the information in memory 41 and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, detailed descriptions are not provided here.

[0222] As one possible implementation, the control device 40 can be a physical device, such as including one or more of the following modules: central processing unit, microprocessor, application-specific integrated circuit, field-programmable gate array, complex programmable logic device (CPLD), coprocessor (assisting the central processing unit in completing corresponding processing and applications), microcontroller unit (MCU), domain controller (DC), vehicle domain controller (VDC), electronic control unit (ECU), cockpit domain controller (CDC), vehicle integration unit (VIU), vehicle control unit (VCU), motor control unit (MCU), etc. Further, the control device 40 includes at least one processor integrated in the form of a system-on-chip (SOC), commonly referred to as an SOC by those skilled in the art. The SOC may include at least one processor, and when the SOC includes multiple processors, the types of processors may be different.

[0223] This application also provides a computer-readable storage medium storing program code that, when run on a computer, causes the computer to perform the method described in any of the above embodiments.

[0224] This application also provides a computer program product, which includes a computer program that, when run, causes a computer to perform the methods described in any of the above embodiments.

[0225] This application also provides a chip, including: a circuit for performing the method in any of the above embodiments.

[0226] This application also provides a driving device, including a seat as described in any of the above embodiments, and / or a control device as described in any of the above embodiments.

[0227] Optionally, the seat and its control method and device provided in this application embodiment can be applied not only to driving equipment, but also to non-transportation scenarios such as industrial equipment, agricultural equipment, and entertainment equipment. Any device or application scenario that requires highly comfortable sitting and reclining support for the human body and has multi-dimensional intelligent posture adjustment requirements can adopt the seat architecture provided in this application embodiment. This application embodiment does not strictly limit the specific application scenario of the seat.

[0228] In the above method embodiments, the order of the process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0229] Those skilled in the art will recognize that the modules and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0230] In the embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or modules may be electrical, mechanical, or other forms.

[0231] The modules described as separate components may or may not be physically separate. Similarly, the components shown as modules may or may not be physical modules; they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0232] In addition, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one processing module.

[0233] If a function is implemented as a software module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0234] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A seat, characterized by include: The backrest frame and seat cushion frame are rotatably connected to the base, and the seat cushion frame is movably connected to the base. The seat includes a seated state and an unfolded state. During the transition of the seat from the seated state to the unfolded state, the backrest frame is configured to rotate rearward relative to the base, and the seat cushion frame is configured to move relative to the base along a forward and upward first trajectory.

2. The seat of claim 1, wherein The unfolded state includes a bed-like state, during which the rear end of the seat cushion frame is configured to move along an upward second trajectory relative to the front end of the seat cushion frame during the transition from the seating state to the bed-like state.

3. The seat according to claim 2, characterized in that, In the bed configuration, the first support surface of the backrest frame is connected to the second support surface of the seat cushion frame, and the angle difference between the included angle and the flat angle between the first support surface and the second support surface is within a first angle range.

4. The seat according to any one of claims 1 to 3, characterized in that, Also includes: Side wing frame, the side wing frame being movably connected to the backrest frame; During the process of the seat switching from the sitting state to the unfolded state, the movement of the side wing frame and the backrest frame is asynchronous for at least part of the time.

5. The seat according to claim 4, characterized in that, In the deployed state, the side wing containing the side wing frame is separated from the side structure of the vehicle.

6. The seat according to claim 4 or 5, characterized in that, The bottom end of the side wing frame is rotatably connected to the bottom end of the backrest frame; During the process of the seat switching from the sitting state to the unfolded state, at least for a portion of the time, the rotational movement of the side wing frame is not synchronized with the rotational movement of the backrest frame.

7. The seat according to claim 6, characterized in that, In the unfolded state, the angle between the side wing frame and the seat cushion frame is the first angle, and the angle between the backrest frame and the seat cushion frame is the second angle, wherein the first angle is smaller than the second angle.

8. The seat according to claim 6 or 7, characterized in that, During the process of the seat switching from the sitting state to the unfolded state, the side wing frame is configured to: rotate in conjunction with the backrest frame during the first angle of rotation of the backrest frame; and disengage from the backrest frame during the second angle of rotation of the backrest frame.

9. The seat according to claim 8, characterized in that, The wing frame is also configured to rotate forward by a third angle from the first angle.

10. The seat according to any one of claims 1 to 9, characterized in that, Also includes: The headrest body is movably connected to the top of the backrest frame, and the headrest body is configured to move relative to the top of the backrest frame.

11. The seat according to claim 10, characterized in that, During the transition of the seat from the seated state to the unfolded state, and / or, in the unfolded state, the headrest body is configured to move relative to the top of the backrest frame along the length of the backrest frame, and / or, along the thickness of the backrest frame.

12. The seat according to claim 10 or 11, characterized in that, During the transition of the seat from the seated state to the unfolded state, and / or, in the unfolded state, the headrest body is configured to flip relative to the top of the backrest frame.

13. The seat according to any one of claims 10 to 12, characterized in that, In the unfolded state, the height difference between the support surface of the headrest body and the support surface of the backrest frame is within a first height range.

14. The seat according to any one of claims 1 to 13, characterized in that, Also includes: A footrest frame, which is movably connected to the seat cushion frame; During the transition of the seat from the seated state to the unfolded state, the footrest frame moves relative to the base along a forward and upward third trajectory.

15. The seat according to any one of claims 1 to 14, characterized in that, The seat also includes a first transmission component connected between the base and the seat cushion frame. The first transmission component is used to drive a first drive source. Under the drive of the first drive source, the first transmission component drives the seat cushion frame to move along the first trajectory.

16. The seat according to claim 15, characterized in that, The first transmission assembly includes a first linkage mechanism, which includes: A first link extends along the depth direction of the seat, and the seat cushion frame is connected to the first link; The second connecting rod is hinged at both ends to the front end of the first connecting rod and the front end of the base, respectively; The third link is hinged at both ends to the rear end of the first link and the rear end of the base, respectively. In this configuration, at least one link in the first linkage mechanism is used to drive the first drive source, and the first drive source is used to drive multiple links in the first linkage mechanism to move together.

17. The seat according to claim 16, characterized in that, The first transmission assembly includes two first linkage mechanisms, which are arranged on the base along the width direction of the seat; The first transmission assembly further includes a first drive link, which is connected between the two first linkage mechanisms. The first drive link is used to connect to the first drive source so that the two first linkage mechanisms are connected to the first drive source through the first drive link.

18. The seat according to claim 17, characterized in that, The first transmission assembly includes two first drive links, one of which is connected to the third link in the two first linkage mechanisms, and the other is connected to the first link in the two first linkage mechanisms. The first drive source includes a first lead screw motor assembly, the two ends of which are rotatably connected to two first drive linkages.

19. The seat according to any one of claims 15 to 18, characterized in that, The seat also includes a second transmission assembly connected between the first transmission assembly and the seat cushion frame. The second transmission assembly is used to connect to a second drive source. Under the drive of the second drive source, the second transmission assembly drives the rear end of the seat cushion frame to move upward along a second trajectory relative to the front end of the seat cushion frame.

20. The seat according to claim 19, characterized in that, The second transmission assembly includes a second linkage mechanism, which includes a fourth link, the fourth link being used for transmission connection to the second drive source; Wherein, one end of the fourth link is hinged to the middle or rear end of the seat cushion frame, the other end of the fourth link is hinged to the middle or rear end of the first link in the first transmission assembly, and the front end of the first link is hinged to the front end of the seat cushion frame.

21. The seat according to claim 20, characterized in that, The second transmission assembly includes two fourth links, which are respectively hinged to two first links along the width direction of the seat. The second transmission assembly also includes a second drive link, which is connected between the two fourth links.

22. The seat according to claim 21, characterized in that, The two fourth links are respectively hinged to the middle or rear end of the two first links, and the front ends of the two first links are fixedly connected to the first drive link. The second drive source includes a second lead screw motor assembly, one end of which is fixedly connected to the first drive link, and the other end is rotatably connected to the second drive link or the fourth link.

23. The seat according to any one of claims 1 to 22, characterized in that, Also includes: A headrest rod, the first end of which is connected to the top of the backrest frame; The headrest body is movably mounted at the second end of the headrest rod; The headrest body includes a first state and a second state. In the first state, the headrest body is configured to lock onto the second end of the headrest rod. In the second state, the headrest body is configured to be unlocked to the second end of the headrest rod and to move relative to the second end.

24. The seat according to claim 23, characterized in that, During the process of the seat switching from the seated state to the unfolded state, and / or, in the unfolded state, the headrest body is configured to switch from the first state to the second state.

25. The seat according to claim 23 or 24, characterized in that, The seat further includes an elastic member connected to the second end and the headrest body. In the second state, after the headrest body is unlocked to the second end, the elastic member is used to drive the headrest body to rotate relative to the second end.

26. The seat according to any one of claims 23 to 25, characterized in that, The second end of the headrest rod is provided with a fixed tooth, and the headrest body is provided with a movable tooth. In the first state, the fixed tooth and the movable tooth mesh with each other, so that the headrest body and the second end are locked together. The seat further includes a first transmission mechanism connected to the movable tooth, and the first transmission mechanism is used to connect to a third drive source. In the second state, the third drive source is used to drive the first transmission mechanism, and the first transmission mechanism drives the movable tooth to move to unlock to the fixed tooth, so that the headrest body is unlocked to the second end.

27. The seat according to claim 26, characterized in that, The first transmission mechanism includes a rotating rod extending along the width direction of the seat, the rotating rod being rotatably connected to the headrest body and fixedly connected to the movable gear; In the second state, the third driving source is used to drive the rotating rod to rotate so as to drive the moving tooth to move.

28. The seat according to any one of claims 23 to 27, characterized in that, The seat also includes a second transmission mechanism, which is connected to the headrest body and is used to connect to a fourth drive source; In the second state, the fourth drive source drives the second transmission mechanism, which in turn drives the headrest body to move relative to the second end along the length direction of the backrest frame and / or along the thickness direction of the backrest frame.

29. A control method, characterized in that, include: Obtain instruction information, which is used to instruct the seat to switch from a seated state to an unfolded state; According to the instruction information, the backrest frame of the seat is controlled to rotate backward relative to the base, and the seat cushion frame moves forward and upward relative to the base along a first trajectory.

30. The method according to claim 29, characterized in that, The unfolded state includes a bed-like state; the method further includes: According to the instruction information, the rear end of the seat cushion frame is controlled to move along an upward second trajectory relative to the front end of the seat cushion frame.

31. The method according to claim 29 or 30, characterized in that, The method further includes: According to the instruction information, the movement of the side wing frame of the seat is controlled, wherein the movement of the side wing frame is asynchronous with the movement of the backrest frame for at least part of the time.

32. The method according to claim 31, characterized in that, The bottom end of the side wing frame is rotatably connected to the bottom end of the backrest frame; Controlling the movement of the side wing frame of the seat includes: The rotational movement of the side wing frame is controlled, wherein the rotational movement of the side wing frame is asynchronous with the rotational movement of the backrest frame for at least a portion of the time.

33. The method according to claim 32, characterized in that, Controlling the rotational movement of the wing frame includes: Control the side wing frame to rotate backward by a first angle following the backrest frame; The backrest frame is controlled to continue rotating from the first angle to the second angle, wherein the side wing frame is decoupled from the backrest frame.

34. The method according to claim 33, characterized in that, The method further includes: Control the side wing frame to rotate forward from the first angle by a third angle.

35. The method according to any one of claims 29 to 34, characterized in that, The method further includes: According to the instruction information, the headrest body of the seat is controlled to move relative to the top of the backrest frame.

36. The method according to claim 35, characterized in that, Controlling the movement of the headrest body of the seat relative to the top of the backrest frame includes: Control the headrest body to move relative to the top of the backrest frame along the length direction of the backrest frame, and / or, along the thickness direction of the backrest frame.

37. The method according to claim 35 or 36, characterized in that, Controlling the movement of the headrest body of the seat relative to the top of the backrest frame includes: Control the headrest body to flip relative to the top of the backrest frame.

38. The method according to any one of claims 29 to 37, characterized in that, The method further includes: According to the instruction information, the footrest frame of the seat is controlled to move relative to the base along a forward and upward third trajectory.

39. A control device, characterized in that, include: Memory, processor, and communication interface; The memory is used to store instructions, and the processor is used to execute the instructions stored in the memory to control the communication interface to acquire information, so that the control device implements the control method as described in any one of claims 29 to 38.

40. A driving device, characterized in that, include: The seat as claimed in any one of claims 1 to 28, and / or the control device as claimed in claim 39.

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