Seat for vehicle

By introducing a drive mechanism and controller into the vehicle seat, the armrest assembly and the partition assembly are driven in tandem, solving the problem of inconvenient operation in the prior art and improving the comfort and space utilization efficiency of the seat.

CN121929032APending Publication Date: 2026-04-28HYUNDAI MOTOR CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HYUNDAI MOTOR CO LTD
Filing Date
2025-05-07
Publication Date
2026-04-28

AI Technical Summary

Technical Problem

The armrests and partitions of existing vehicle seats are not flexible enough to respond to passengers' seating posture adjustments, resulting in inconvenience in operation and low space utilization efficiency.

Method used

The handrail assembly and the partition assembly are driven as a whole by a drive mechanism and a controller. Through the linkage between the partition link and the handrail link, the handrail assembly can move longitudinally and vertically in response to user requests.

Benefits of technology

It improves the comfort and convenience of the seats, increases space utilization efficiency, simplifies passenger operation of the armrests, and enhances the overall functionality of the seats.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present disclosure provides a seat for a vehicle. A seat for a vehicle includes a partition assembly positioned adjacent to the seat, an armrest assembly positioned adjacent to the partition assembly, a drive mechanism configured to selectively apply a drive force to the partition assembly and the armrest assembly, and a controller configured to power the drive mechanism in response to a user request. The partition assembly includes a frame fixed to the base, a partition located on the frame, and a partition link located between the partition and the drive mechanism.
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Description

Technical Field

[0001] The present invention relates to a seat for a vehicle, and more particularly to a seat for a vehicle comprising an armrest assembly and a partition assembly, and being capable of controlling the armrest assembly and the partition assembly. Background Technology

[0002] The vehicle is equipped with seats for passengers. The seats may be equipped with armrests, allowing passengers to rest their arms on the armrests for improved comfort.

[0003] For example, an existing armrest may be a rotatable armrest component integrated into the seat. Specifically, the armrest can be operated such that a passenger in the seat rotates the armrest to adjust its angle. In some cases, it may not be possible to accommodate various armrest angles in response to the passenger's sitting posture, and manual operation may be inconvenient.

[0004] In some cases, the partition in a vehicle may be set separately from the armrest and have a fixed structure that is difficult to extend in the vertical or longitudinal direction in response to user requests.

[0005] The integrated drive relationship between adjacent components allows the armrest position to change as the partition operates. For example, the positions of the partition and armrests can be adjusted in response to the user's seat position. Summary of the Invention

[0006] This disclosure describes a seat for a vehicle that is capable of selectively actuating both the armrest assembly and the partition assembly in a single drive mechanism.

[0007] This disclosure also describes a structure in which the partition assembly unfolds in response to the seat position in the forward and vertical directions, and the armrest assembly moves forward and downward in response to the seat height.

[0008] According to one aspect of the subject matter described in this application, a seat for a vehicle includes: a partition assembly adjacent to the seat, an armrest assembly adjacent to the partition assembly, a drive mechanism configured to apply a driving force to the partition assembly and the armrest assembly, and a controller configured to supply power to the drive mechanism in response to a user request. The partition assembly includes: a base, a frame fixed to the base, a partition member located in the frame, and a partition link located between the partition member and the drive mechanism.

[0009] The implementation of this aspect may include one or more of the following features. For example, the separator link may include: a main link coupled to the drive mechanism, a first transmission link located between a first end of the main link and the separator and configured to perform longitudinal movement in response to the rotational force of the drive mechanism, and a second transmission link located between a second end of the main link and the separator and configured to perform vertical movement in response to the rotational force of the drive mechanism.

[0010] In some implementations, the handrail assembly may include: a handrail located adjacent to the partition assembly, a handrail link coupled to the main link and disposed adjacent to the first transmission link, and a handrail hinge link located on the handrail and coupled to the handrail link.

[0011] In some implementations, the seat may further include: an armrest frame located on the base, an armrest block located at the rear end of the armrest, and a guide located between the armrest block and the armrest frame. In some examples, the armrest may be configured to move in the direction of movement of the armrest link based on the rotational force of an applied drive mechanism, and the armrest block may be configured to move along the guide based on the rotational force of the applied drive mechanism.

[0012] In some examples, the guide has a predetermined angle relative to the base so that the armrest can move in a parallel state relative to the base. In some implementations, the seat may also include a bushing located on the armrest block and covering the guide.

[0013] In some implementations, the armrest link may define a slot, and the seat may further include a protrusion disposed on the main link and inserted into the slot, and a position control device configured to limit movement of the protrusion in the slot. For example, the position control device may include a pin configured to insert into the slot.

[0014] In some implementations, the handrail link and main link can be configured to move integrally with each other based on the pin insertion slot of the position control device to limit the position of the protrusion. In some examples, the controller can be configured to control the position control device in response to drive requests from the handrail assembly and the partition assembly, so that the handrail link rotates integrally with the main link.

[0015] In some implementations, the controller may be configured to drive the drive mechanism in response to a user's seat tilt request. In some examples, the drive mechanism may include an output shaft connected to a main link, and the main link may include a first secondary link coupled to a first drive link and a second secondary link coupled to a second drive link.

[0016] In some examples, a first connecting rod may extend from the portion connected to the output shaft along a first direction, and a second connecting rod may extend from the portion connected to the output shaft along a second direction, different from the first direction. In some examples, a predetermined angle is defined about the output shaft between the first and second connecting rods. In some examples, the length of the first connecting rod may be less than the length of the second connecting rod.

[0017] In some implementations, the seat disclosed herein has the effect of providing seat comfort by implementing the height of the partition components and armrest components in response to the user's seat position.

[0018] In some implementations, the seat disclosed herein has the effect of increasing user convenience by enabling selective or coordinated operation of the partition components and armrest components.

[0019] In some implementations, the seat structure of this disclosure has the effect of improving the space efficiency of the vehicle by utilizing a structure that can drive the partition assembly and the armrest assembly individually or simultaneously with a single drive mechanism. Attached Figure Description

[0020] Figure 1 This is a view showing examples of the divider and armrest components included in a vehicle seat example.

[0021] Figure 2 This is a view showing an example of the positional relationship of the armrest components in a reclined seat position.

[0022] Figure 3 This is a view showing an example configuration including divider components and armrest components.

[0023] Figure 4 This is an exploded view showing the partition components.

[0024] Figure 5 This is an exploded view of the handrail assembly.

[0025] Figure 6 This is an exploded view showing the partition components before use.

[0026] Figure 7 This is a view that shows an example of the expanded state of the split components.

[0027] Figure 8a and Figure 8b This is a view showing an example of the connection structure between the main link and the handrail link when the pin of the position control device is deployed.

[0028] Figure 9a and Figure 9bThis is a view showing an example of the connection structure between the main link and the handrail link when the pin of the position control device is released.

[0029] Specific implementation method

[0030] In the following sections, one or more exemplary implementations of this disclosure will be described in detail with reference to the accompanying drawings.

[0031] The terms “~part,” “~unit,” “module,” etc. used in the specification may refer to a unit used to perform at least one function or operation, and may be implemented by a combination of hardware and / or software.

[0032] For example, controller 500 can be implemented using an algorithm for controlling the operation of various components installed in a vehicle, a memory storing data about a program that reproduces the algorithm, and a processor using the data stored in the memory to perform the aforementioned operations. In some examples, the memory and processor can be implemented using separate chips. Alternatively, the memory and processor can be implemented using simpler chips. For example, controller 500 may include at least one of an electronic control unit (ECU), a central processing unit (CPU), a microprocessor unit (MPU), a microcontroller unit (MCU), an application processor (AP), and an application processor (AP). Furthermore, controller 500 may include a combination of software and hardware capable of performing operations on at least one of the application programs or programs used to execute the methods of this disclosure.

[0033] In the following description, the implementation will be described in detail with reference to the accompanying drawings, and the same reference numerals will be used to refer to the same or similar parts in the description or reference to the drawings, and the description of these parts will be omitted.

[0034] The present invention relates to a seat 10 for a vehicle. More specifically, the present invention relates to a partition assembly 100 located adjacent to the seat 10 for a vehicle and an armrest assembly 200 integrally driven with the partition assembly 100.

[0035] Figure 1 This is a view showing an example configuration of the seat 10, partition assembly 100, and armrest assembly 200 for a vehicle.

[0036] In some implementations, the seat 10 for a vehicle includes one or more partition components 100 that separate a seat 10. Furthermore, the partition component 100 includes an armrest assembly 200 that is movable longitudinally and vertically within the vehicle.

[0037] The partition assembly 100 includes a partition 120 disposed in the frame 110 and a partition link 130 connected to the partition 120 to apply the driving force of the drive mechanism 300 to the partition 120. When the driving force of the drive mechanism 300 is applied through the partition link 130, the partition 120 extends back and forth in the longitudinal direction of the vehicle and extends up and down in the height direction.

[0038] Furthermore, the armrest assembly 200 is positioned to be selectively movable along the partition 120. The armrest assembly 200 includes an armrest 210 on which a user's arm can be placed, and when a rotational force is applied to the drive mechanism 300, the armrest 210 can move forward in the longitudinal direction of the vehicle and downward in the height direction of the vehicle.

[0039] The controller 500 can be configured for a vehicle and may include an electronic control unit (ECU) or a controller for the seat 10. In some examples, the controller 500 may include circuitry, a control interface, one or more buttons, one or more levers, a display panel, etc.

[0040] When a user request is made, controller 500 may drive partition assembly 100 and / or armrest assembly 200. In some examples, when controller 500 receives a drive request to tilt seat 10 or a request to unfold partition 120 as a user request, controller 500 may apply power from vehicle battery to drive mechanism 300.

[0041] In some examples, seat tilting refers to moving the seat to a position where the seat back is extended further back than a preset angle and the front of the seat cushion is raised to form a predetermined angle for the seat cushion accordingly.

[0042] In addition, the controller 500 controls the pin of the position control device 270, and can preset the movement of the handrail assembly 200 integrally with or selectively with the separator 120.

[0043] Figure 2 The height and longitudinal changes of the armrest 210 are shown when the seat is in a tilted position.

[0044] When the controller 500 receives user input or a request, the controller 500 can tilt the seat 10 and change the height and longitudinal position of the armrest assembly 200 in response to the change in the angle of the seat 10 according to the tilt of the seat 10.

[0045] In some examples, the armrest assembly 200 can move integrally with the partition assembly 100. Furthermore, the controller 500 can control the position control device 270 so that only the partition assembly 100 extends independently, moving forward in the longitudinal direction of the vehicle and upward in the vertical direction.

[0046] In some examples, the drive mechanism 300 may include a motor, shaft, gear, linkage, etc., configured to generate power. For example, in some implementations, the drive mechanism 300 may include a main link 131 as a partition link 130, and the drive mechanism 300 may perform forward movement in the longitudinal direction of the partition 120 via a first transmission link 141 coupled to the partition 120, and upward movement in the height direction of the partition 120 via a second transmission link 142. Furthermore, the drive mechanism 300 may perform forward and downward movement in the height direction of the handrail 210 via a handrail link 220 coupled to the main link 131.

[0047] In some examples, as the height between the seat portion and the armrest 210 increases from, for example... Figure 1 The 200mm in the upright position shown becomes as follows Figure 2 The 110mm tilt shown in the figure improves the accessibility of the armrest 210 for users sitting in the reclining seat.

[0048] Furthermore, the position control device 270 provides selective engagement between the main link 131 of the partition assembly 100 and the handrail assembly 200, and the handrail assembly 200. In some examples, in response to user input or settings, the position control device 270 may selectively deploy only the partition assembly 100, or may selectively engage both the partition assembly 100 and the handrail assembly 200.

[0049] In some examples, the drive mechanism 300 applies a driving force to the partition assembly 100, and can apply a driving force to both the partition assembly 100 and the armrest assembly 200.

[0050] In some implementations, when the controller receives a seat tilt request, the controller can apply a driving force to both the partition assembly 100 and the armrest assembly 200 through the drive mechanism.

[0051] Figure 3 This is a view showing the configuration of the partition assembly 100 and armrest assembly 200 for the seat 10 of the vehicle. Figure 4 This is an exploded view showing the separator component 100. Furthermore, Figure 5 This is an exploded view showing the armrest assembly 200.

[0052] The partition assembly 100 is located on at least one side of the seat 10 for the vehicle, and the armrest assembly 200 may be located on one side of the partition assembly 100 facing the seat 10. The partition assembly 100 includes a frame 110 positioned perpendicular to the vehicle floor, and a partition member 120 located inside the frame 110 and moving in response to a driving force of the drive mechanism 300.

[0053] The separator assembly 100 includes a main link 131 coupled to a rotating shaft of the drive mechanism 300, and a first end of the main link 131 includes a first transmission link 141. Furthermore, the first transmission link 141 is coupled adjacent to the front end of the separator 120. Additionally, prior to operation of the drive mechanism 300, a second end of the main link 131 is coupled to a second transmission link 142 in a region adjacent to the lower end of the separator 120.

[0054] The main connecting rod 131 includes a first auxiliary connecting rod 131a connected to the first transmission connecting rod 141 and a second auxiliary connecting rod 131b connected to the second transmission connecting rod 142, centered on a rotational axis connected to the drive mechanism 300. The first auxiliary connecting rod 131a is relatively shorter than the second auxiliary connecting rod 131b, and the first auxiliary connecting rod 131a and the second auxiliary connecting rod 131b can have a predetermined angle centered on the rotational axis. For example, the first auxiliary connecting rod 131a can extend from the portion connected to the output shaft 600 along a first direction, and the second auxiliary connecting rod 131b can extend from the portion connected to the output shaft 600 along a second direction, wherein the second direction is different from the first direction to define the predetermined angle.

[0055] Therefore, when the main connecting rod 131 rotates via the drive mechanism 300, the amount of movement of the separator 120 in the longitudinal direction due to the rotation of the first auxiliary connecting rod 131a via the first transmission connecting rod 141 is configured to be relatively smaller than the amount of movement of the separator 120 in the height direction due to the rotation of the second auxiliary connecting rod 131b via the second transmission connecting rod 142.

[0056] In some examples, taking into account the longitudinal and height movements of the separator 120, the lengths of the first link 131a and the second link 131b, as well as the angles formed by the first link 131a and the second link 131b to each other, can be changed.

[0057] In some implementations, the drive mechanism 300 is securely attached to the bracket based on the base 400. The opposite ends of the main link 131, located at the rotation axis of the fixed drive mechanism 300, are respectively attached to the first transmission link 141 and the second transmission link 142. Furthermore, the main link 131 is attached to the handrail link 220 such that its first end is adjacent to the first transmission link 141. The second end of the handrail link 220 is attached to the handrail hinge link 230 located on the handrail 210. Therefore, when the handrail hinge link 230 moves with the handrail link 220, the handrail 210 also moves with the handrail hinge link 230.

[0058] Furthermore, the handrail link 220 is located on the first auxiliary link 131a, and when the main link 131 rotates, the handrail link 220 includes a movement path similar to that of the first transmission link 141. Therefore, the handrail 210 has a movement amount similar to that of the partition 120 in the longitudinal direction.

[0059] Furthermore, the armrest hinge link 230 is positioned to be integrally integrated with the armrest block 250 into the armrest 210. The armrest block 250 protrudes from the lower end of the armrest 210 and covers the guide member 260 disposed through the armrest block 250. In addition, a bushing 261 is provided on the armrest block 250, and the bushing 261 is positioned to cover the guide member 260.

[0060] Furthermore, the opposite ends of the guide member 260 are fixed to the handrail hinge link 240, which is coupled to the base 400. In some implementations, the handrail hinge link 240 is located at the front and rear ends of the handrail block 250, respectively, and is fixed to the base 400. The guide member 260 is angled and coupled to the handrail hinge link 240.

[0061] In some implementations, when the driving force of the drive mechanism 300 is applied to the armrest 210, the armrest link 220, which is connected to the main link 131, moves integrally with the armrest hinge link 230, and the armrest 210, which is connected to the armrest hinge link 230, moves in the same direction as the movement direction of the armrest hinge link 230. Furthermore, the armrest block 250 located at the rear end of the armrest 210 moves integrally with the armrest 210 in the tilt direction of the guide 260. Therefore, when the driving force of the drive mechanism 300 is applied, the armrest 210 remains parallel in the longitudinal direction of the vehicle and moves forward in the longitudinal direction and downward in the height direction.

[0062] As described above, the handrail 210 is coupled to the handrail link 220 and moves forward and downward in the rotational direction of the main link 131. The rear end of the handrail 210 includes a handrail block 250 coupled to the guide 260, so that the handrail 210 remains in a parallel state.

[0063] Figure 6 This is an exploded view showing the partition assembly 100 and the armrest assembly 200 before they are unfolded.

[0064] In some implementations, the main connecting rod 131, which is coupled to the rotating shaft of the drive mechanism 300, has a first end located at the upper end in the longitudinal direction and a second end located at the lower end in the longitudinal direction. Furthermore, a handrail connecting rod 220 is provided coupled to a position adjacent to one end of the main connecting rod 131.

[0065] When the first transmission link 141 is engaged with the first end of the separator 120 and the main link 131, the separator 120 is located inside the frame 110 when the main link 131 is not rotating. Furthermore, the second transmission link 142 is engaged with the second end of the main link 131 located adjacent to the base 400, such that the separator 120 is located inside the frame 110 in the height direction.

[0066] After that, Figure 7 The positions of the separator 120 and the handrail 210 are shown when current is applied to the drive mechanism 300.

[0067] In some implementations, when current is applied to the drive mechanism 300 and the drive mechanism 300 rotates counterclockwise, the main connecting rod 131, coupled to the rotational shaft of the drive mechanism 300, rotates in the same direction. Therefore, the first end of the main connecting rod 131 rotates from the right side to the left side of the drive mechanism 300, and the first transmission connecting rod 141, coupled to the first end of the main connecting rod 131, can apply tension to the frame 110, causing the frame 110 to move in the longitudinal direction. In some implementations, the first end of the main connecting rod 131, coupled to the first transmission connecting rod 141, has the same height relationship before and after the drive mechanism 300 is driven. Accordingly, the longitudinal movement of the first transmission connecting rod 141 is actually equal to the longitudinal movement of the separator 120.

[0068] In some examples, such as Figure 6 As shown, when the second end of the main connecting rod 131 is located at the lower end based on the base 400, the second end of the main connecting rod 131 moves relatively upward in the height direction in response to the rotation of the drive mechanism 300. Furthermore, the second transmission connecting rod 142, which is coupled to the second end of the main connecting rod 131, moves integrally with the separator 120, allowing the separator 120 to move in the height direction in response to the movement of the second end of the main connecting rod 131 in the height direction.

[0069] In some examples, when the second end of the main link 131 moves in the height direction, the second end of the main link 131 is configured to have the same longitudinal position before and after the drive mechanism 300 is driven. The amount of movement of the second end of the main link 131 in the height direction is equal to the amount of movement of the separator 120 in the longitudinal direction.

[0070] Furthermore, the handrail link 220 is adjacent to the first end of the main link 131, which is connected to the first transmission link 141, and the handrail 210 moves longitudinally in response to the amount of rotation of the main link 131. Additionally, the handrail link 220 moves at a predetermined angle in response to the rotation of the main link 131, and the handrail 210 moves forward and downward in response to the direction of movement of the handrail link 220. In other words, the longitudinal movement of the handrail link 220 is relatively less than the movement of the partition 120, and it becomes raised along its lower end in the height direction.

[0071] In some implementations, the longitudinal movement of the handrail 210 is preset differently depending on the engagement position between the handrail link 220 and the main link 131, and the longitudinal and height movements between the partition 120 and the handrail 210 can be changed.

[0072] Figure 8a and Figure 8b An example of the driving relationship for a seat 10 in a vehicle including a position control device 270 is shown, wherein the pin 271 of the position control device 270 is engaged in a slot 221 of the armrest link 220.

[0073] For example, armrest link 220 is located adjacent to main link 131, and the protrusion 131c of main link 131 is located within a slot 221 of armrest link 220. In some implementations, the seat may include a position control device 270 located outside armrest link 220 and having a pin 271 that selectively inserts into slot 221. Position control device 270 is configured to selectively insert pin 271 into a hole located in slot 221. In some examples, pin 271 of position control device 270 and protrusion 131c of main link 131 mutually restrain each other, such that armrest link 220 and main link 131 move integrally.

[0074] like Figure 8b As shown, the protrusion 131c of the main link 131 is located at the end of the slot 221 adjacent to the position control device 270, and the pin 271 of the position control device 270 is inserted into the slot 221. In this case, the protrusion 131c of the main link 131 is positioned to rotate within the slot 221. When the main link 131 rotates, the protrusion 131c is configured to apply a rotational force to the handrail link 220 integrally with the main link 131. In some examples, when the main link 131 and the handrail link 220 are engaged with each other, the protrusion 131c is configured to move the handrail assembly 200 integrally with the unfolding of the partition assembly 100.

[0075] In some implementations, such as Figure 9a and Figure 9b As shown, pin 271 of position control device 270 is separated from slot 221. In this case, when the partition assembly 100 is deployed in the longitudinal and height directions, the driving force of drive mechanism 300 is not applied to handrail assembly 200. In some examples, when main link 131 rotates, protrusion 131c located at the first inner end of slot 221 can move to the second inner end of slot 221, while handrail link 220 does not move.

[0076] In some examples, although the driving force of the drive mechanism 300 is not applied to the armrest link 220, the protrusion 131c can move along the interior of the groove 221. In other words, the groove 221 is formed to correspond to the movement path of the protrusion 131c, and the driving force of the drive mechanism 300 is not applied to the armrest link 220. Therefore, the partition 120 unfolds in the longitudinal and height directions of the vehicle, and the armrest 210 remains in the same position as before the operation.

[0077] The detailed description above is an example of this disclosure. Furthermore, exemplary implementations of this disclosure have been described above, and this disclosure can be used in many different combinations, variations, and environments. In other words, changes or modifications can be made within the scope of this specification, within the scope of equivalence to the described disclosure, and / or within the scope of technology or knowledge in the art. The described implementations have described the best mode for implementing the technical ideas of this disclosure, and various modifications can also be made to this disclosure for specific application areas and uses. Therefore, the detailed description above is not intended to limit this disclosure to the disclosed implementations. Furthermore, it should be understood that the appended claims include other implementations.

Claims

1. A seat for a vehicle, the seat comprising: A partition assembly located adjacent to the seat; The handrail assembly located adjacent to the partition assembly; A drive mechanism configured to apply a driving force to at least one of the partition assembly or the armrest assembly; as well as The controller is configured to supply power to the drive mechanism in response to a user request. The separating component includes: Base The frame fixed to the base, The partition located in the frame, and The separating link is located between the separator and the drive mechanism.

2. The seat according to claim 1, wherein, The separating link includes: The main connecting rod is connected to the drive mechanism; A first transmission link, located between the first end of the main link and the separator, is configured to perform longitudinal movement in response to the rotational force of the drive mechanism; and The second transmission link is located between the second end of the main link and the separator, and is configured to perform vertical movement in response to the rotational force of the drive mechanism.

3. The seat according to claim 2, wherein, The armrest assembly includes: The handrail located adjacent to the partition assembly; Handrail link, which is connected to the main link and disposed adjacent to the first transmission link; and A handrail hinge link, which is located on the handrail and connected to the handrail link.

4. The seat according to claim 3, further comprising: The handrail frame located on the base; The handrail block located at the rear end of the handrail; as well as A guide located between the handrail block and the handrail frame.

5. The seat according to claim 4, wherein, The handrail is configured to move in the direction of movement of the handrail link based on the rotational force applied by the drive mechanism, and The handrail block is configured to move along the guide based on the rotational force applied by the drive mechanism.

6. The seat according to claim 4, wherein, The guide member has a predetermined angle relative to the base so that the handrail can move in a parallel state relative to the base.

7. The seat according to claim 4, further comprising: The bushing is located on the handrail block and covers the guide.

8. The seat according to claim 3, wherein, The handrail link defines the groove, and The seat also includes: A protrusion disposed on the main connecting rod and inserted into the slot; and A position control device configured to limit movement of the protrusion in the groove, the position control device including a pin configured to be inserted into the groove.

9. The seat according to claim 8, wherein, The handrail link and the main link are configured such that the pin of the position control device is inserted into the slot to limit the position of the protrusion, while moving integrally with each other.

10. The seat according to claim 8, wherein, The controller is configured to control the position control device in response to drive requests from the handrail assembly and the partition assembly, so that the handrail link rotates integrally with the main link.

11. The seat according to claim 10, wherein, The controller is configured to drive the drive mechanism in response to a user's request to tilt the seat.

12. The seat according to claim 2, wherein, The drive mechanism includes an output shaft connected to the main connecting rod, and The main connecting rod includes: The first connecting rod, which is connected to the first transmission connecting rod; and The second connecting rod is connected to the second transmission connecting rod.

13. The seat according to claim 12, wherein, The first auxiliary connecting rod extends from the portion connected to the output shaft along a first direction, and The second auxiliary link extends from the portion connected to the output shaft along a second direction, which is different from the first direction.

14. The seat according to claim 12, wherein, A predetermined angle is defined about the output shaft between the first auxiliary link and the second auxiliary link.

15. The seat according to claim 12, wherein, The length of the first connecting rod is less than the length of the second connecting rod.

16. The seat according to claim 1, wherein, The drive mechanism includes at least one of a motor, a shaft, a gear, or a connecting rod.

17. The seat according to claim 3, wherein, The handrail link defines the groove, and The seat also includes: A protrusion disposed on the main connecting rod and inserted into the slot; and A pin, configured to be inserted into the slot to restrict movement of the protrusion within the slot.