Leg rest structure, seat assembly, and vehicle

Abstract

The application discloses a leg support structure, a seat assembly and a car, and belongs to the technical field of seat accessories. The leg support structure comprises a first leg support and a second leg support. The first leg support is adapted to be rotationally connected with a seat. The second leg support is connected with the first leg support. The second leg support has a first state. In the first state, the upper surface of the second leg support is flush with the upper surface of the first leg support. According to the leg support structure, the length of the leg support can be adjusted according to the use requirement, and the surfaces of the first leg support and the second leg support are flush after the leg support is unfolded, so that the comfort of the leg support is improved.

Description

Technical Field

[0001] This application relates to the field of automotive seat technology, and more specifically, to a leg rest structure, a seat assembly, and a vehicle. Background Technology

[0002] As car cabin functions become increasingly sophisticated, consumers are demanding more from leg rests. However, current leg rests are generally short due to space constraints, providing only partial support and leaving most of the legs unsupported, which can easily lead to soreness and discomfort. Therefore, it is necessary to extend the length of leg rests. Currently, most existing solutions use sliding rails to extend the leg rest, but this method suffers from uneven surfaces on the primary and secondary leg rests, severely impacting the user experience. Summary of the Invention

[0003] To address the problems of inconsistent height, friction with the legs, and difficulty in covering the foam cover when adjusting the length of the leg support through internal telescopic adjustment in the existing technology, and to achieve the technical effects of a flush leg support surface, avoiding friction, improving coverage and user comfort, this invention provides a leg support structure.

[0004] This application also proposes a seat assembly having the aforementioned leg support structure.

[0005] This application also proposes a vehicle having the aforementioned seat assembly.

[0006] According to a first aspect embodiment of the present application, a leg support structure includes a first leg support and a second leg support; the first leg support is adapted to be rotatably connected to a seat; the second leg support is connected to the first leg support; the second leg support has a first state in which the upper surface of the second leg support is flush with the upper surface of the first leg support.

[0007] Preferably, the second leg rest also has a second state in which the upper surface of the second leg rest is not flush with the upper surface of the first leg rest.

[0008] Furthermore, in the second state, the second leg support at least partially overlaps with the first leg support, while in the first state, the second leg support does not overlap with the first leg support.

[0009] Optionally, in the first state, the second leg rest abuts against the first leg rest.

[0010] Preferably, the leg support structure further includes a first drive unit and a first transmission unit; the second leg support is connected to the first leg support through the first transmission unit; the first drive unit drives the first transmission unit to switch the second leg support between the first state and the second state.

[0011] Furthermore, the first drive unit drives at least a portion of the first transmission unit to rotate relative to the first leg rest, and when the at least a portion of the first transmission unit rotates relative to the first leg rest, it causes the second leg rest to switch between the first state and the second state.

[0012] Optionally, the first transmission unit includes at least two first links and at least one second link; one end of the first link is hinged to the first leg support, and the other end of the first link is hinged to the second link; the second link is connected to the second leg support; the first drive unit drives the first link to rotate relative to the first leg support, so as to drive the second leg support to switch between the first state and the second state.

[0013] Preferably, the first leg support includes an extension bracket extending along the length direction of the first leg support, one end of the first connecting rod is hinged to the extension bracket, and the second connecting rod is parallel to the extension bracket.

[0014] Furthermore, when the second leg support switches from the second state to the first state, the first drive unit drives the first link to rotate counterclockwise relative to the first leg support; when the second leg support switches from the first state to the second state, the first drive unit drives the first link to rotate clockwise relative to the first leg support.

[0015] Optionally, the second leg support also has a third state. After the first drive unit drives the second leg support to switch from the second state to the first state, it continues to drive the first link to rotate counterclockwise relative to the first leg support, so that the second leg support switches to the third state.

[0016] Preferably, the width of the second leg rest is smaller than that of the first leg rest.

[0017] Furthermore, the leg support structure also includes a second drive unit and a second transmission unit; the second transmission unit includes a synchronizing rod and a pair of linkage mechanisms; the linkage mechanisms are disposed opposite to each other on both sides of the first leg support, and the two ends of the synchronizing rod are respectively connected to the linkage mechanisms.

[0018] Optionally, the linkage mechanism includes at least a first short link, a first long link, a second long link, and a second short link; the first short link and the first long link are arranged in parallel, and one end of the first short link and one end of the first long link are adapted to be connected to the seat; the second long link and the second short link are arranged in parallel, and one end of the second long link and one end of the second short link are connected to the first leg rest; the other end of the first short link is hinged to the other end of the second long link, and the other end of the first long link is hinged to the other end of the second short link, and the first long link and the second long link are cross-overlaid and hinged to each other at the middle.

[0019] Preferably, the two ends of the synchronizing rod are respectively connected to a pair of first long connecting rods arranged opposite each other.

[0020] Furthermore, the second drive unit drives the second transmission unit to switch the first leg support between the fourth and fifth states.

[0021] Optionally, the second drive unit includes a motor and a lead screw. One end of the lead screw can be connected to the synchronizing rod, and the other end of the lead screw is connected to the output end of the motor. The motor drives the lead screw to move relative to the motor, thereby causing the second transmission unit to extend, so that the first leg support switches between the fourth state and the fifth state.

[0022] Preferably, the outer sides of the first leg rest and the second leg rest are covered with a covering layer.

[0023] According to a second aspect of this application, a seat assembly is provided, the seat assembly including a seat and a leg rest structure according to a first aspect of this application.

[0024] A vehicle is provided according to a third aspect of the present application, the vehicle including a seat assembly according to a second aspect of the present application.

[0025] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 This is a schematic diagram of the leg support structure according to an embodiment of this application, in which the second leg support is in the first state;

[0028] Figure 2This is a schematic diagram of the leg support structure according to an embodiment of this application, in which the second leg support is in the second state;

[0029] Figure 3 This is a schematic diagram of the leg support structure according to an embodiment of this application, in which the second leg support is in the third state;

[0030] Figure 4 yes Figure 3 Another structural diagram of the middle leg support structure;

[0031] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0032] Figure 6 This is a schematic diagram of the leg support structure from another perspective according to an embodiment of this application, in which the second leg support is in the second state.

[0033] Figure label:

[0034] 1. Seat; 2. First leg rest; 3. Second leg rest; 4. Second transmission unit; 5. First transmission unit;

[0035] 51. First link; 52. Second link;

[0036] 6. Synchronizing rod; 7. Linkage mechanism; 71. First short link; 72. First long link; 73. Second long link; 74. Second short link; 75. Extension bracket;

[0037] 8. First drive unit; 9. Second drive unit;

[0038] 91. Motor; 92. Lead screw. Detailed Implementation

[0039] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0040] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0041] A leg support structure according to a first aspect embodiment of this application, such as Figure 1As shown, it includes a first leg rest 2 and a second leg rest 3. The first leg rest 2 is adapted to be rotatably connected to the seat 1, and the second leg rest 3 is connected to the first leg rest 2. The second leg rest 3 has a first state in which the upper surface of the second leg rest 3 is flush with the upper surface of the first leg rest 2 (e.g., Figure 1 (As shown).

[0042] For example, the first leg rest 2 is a cuboid structure with a flat upper surface for supporting the user's legs. One end of the first leg rest 2 is connected to the front end of the seat 1 via a pivot, allowing the first leg rest 2 to rotate relative to the seat 1. The other end of the first leg rest 2 is connected to the second leg rest 3. For example, the first leg rest 2 has a length of approximately 400 mm, a width of approximately 450 mm, and a height of approximately 50 mm.

[0043] For example, the second leg support 3 is also a cuboid structure with a flat upper surface for supporting the user's lower legs and feet. One end of the second leg support 3 is connected to the first leg support 2, and the other end is free. For example, the second leg support 3 is approximately 350mm long, 400mm wide, and 50mm high. The width of the second leg support 3 is smaller than the width of the first leg support 2, a design that allows the second leg support 3 to be partially tucked under the first leg support 2 when needed.

[0044] In some embodiments, such as Figure 1 As shown, the system includes a first leg rest 2, a second leg rest 3, a second transmission unit 4, and a first transmission unit 5. One end of the first leg rest 2 is connected to one end of the second transmission unit 4, and the other end of the second transmission unit 4 is adapted to connect to the seat 1. The first transmission unit 5 connects the first leg rest 2 and the second leg rest 3. The second leg rest 3 has a first state and a second state. In the second state, the upper surface of the second leg rest 3 is not flush with the upper surface of the first leg rest 2 (e.g., ...). Figure 2 As shown), in the first state, the upper surface of the second leg support 3 is flush with the upper surface of the first leg support 2 (as shown). Figure 1 (As shown). The first transmission unit 5 drives the second leg support 3 to switch between the first state and the second state.

[0045] In this embodiment, the first leg rest 2 is the main leg rest part, used to support the user's thighs, and the second leg rest 3 is the auxiliary leg rest part, used to extend the length of the leg rest when needed to accommodate users of different heights. The first leg rest 2 is connected to the seat 1 through the second transmission unit 4, allowing the first leg rest 2 to be adjusted relative to the seat 1. The second leg rest 3 is connected to the first leg rest 2 through the first transmission unit 5, allowing the second leg rest 3 to be adjusted in position relative to the first leg rest 2.

[0046] The first leg support 2 is made of rigid material, possessing sufficient strength and rigidity to support the weight of the user's legs. The upper surface of the first leg support 2 is slightly convex, forming an ergonomic arc design to provide more comfortable support. Connection points for mounting the second transmission unit 4 and the first transmission unit 5 are provided on both sides of the first leg support 2.

[0047] The structure of the second leg rest 3 is similar to that of the first leg rest 2, also made of rigid material, and its upper surface is designed with an ergonomic curved shape. In the second state, the second leg rest 3 at least partially overlaps with the first leg rest 2, and the upper surface of the second leg rest 3 is lower than the upper surface of the first leg rest 2, so that the second leg rest 3 is hidden under the first leg rest 2. In the first state, the second leg rest 3 slides out from under the first leg rest 2, does not overlap with the first leg rest 2, and the upper surface of the second leg rest 3 is flush with the upper surface of the first leg rest 2, forming an extended support surface, providing the user with longer leg support.

[0048] In some embodiments, in the first state, the second leg support 3 abuts against the first leg support 2, that is, there is no gap between the second leg support 3 and the first leg support 2 in the first state. This can provide users with a better leg support experience.

[0049] In some embodiments, such as Figure 1 As shown, the first drive unit 8 drives the first transmission unit 5 to switch the second leg support 3 between a first state and a second state. Specifically, the first drive unit 8 is connected to the power input end of the first transmission unit 5 via its output shaft, thereby transmitting power to the first transmission unit 5. The first transmission unit 5 further transmits power to the support structure of the second leg support 3 through a transmission mechanism (such as a gear set, belt drive, or chain drive), enabling it to move on a preset track or path. The first drive unit 8 allows the user to intelligently control the leg support structure, further improving the safety, reliability, and user experience of the equipment.

[0050] In some embodiments, such as Figure 4 , Figure 5 As shown, the first transmission unit 5 includes at least two first connecting rods 51 and at least one second connecting rod 52. One end of the first connecting rod 51 is hinged to the first leg support 2, and the other end of the first connecting rod 51 is hinged to the second connecting rod 52. The second connecting rod 52 is connected to the second leg support 3. The first drive unit 8 drives the first connecting rod 51 to rotate relative to the first leg support 2, thereby causing the second leg support 3 to switch between a first state and a second state.

[0051] In some embodiments, such as Figure 1-5As shown, the first leg support 2 includes an extension bracket 75 extending along the length of the first leg support 2. One end of the first connecting rod 51 is hinged to the extension bracket 75, and the second connecting rod 52 is parallel to the extension bracket 75. The extension bracket 75 provides a stable hinge point for the first connecting rod 51, ensuring that the first connecting rod 51 can rotate smoothly, and also provides guidance for the second connecting rod 52, enabling the second connecting rod 52 to move parallel to the extension bracket 75.

[0052] In some embodiments, when the second leg support 3 switches from the second state to the first state, the first drive unit 8 drives the first link 51 to rotate counterclockwise relative to the first leg support 2 (i.e., from the second state to the first state). Figure 2 Status to Figure 1 (In the first state). The first link 51 rotates counterclockwise, causing the second link 52 to move forward, which in turn pushes the second leg support 3 to slide out from under the first leg support 2 until the upper surface of the second leg support 3 is flush with the upper surface of the first leg support 2, and the second leg support 3 abuts against the first leg support 2. In the first state, the second leg support 3 and the first leg support 2 form a continuous support surface, providing the user with longer leg support.

[0053] In some embodiments, when the second leg support 3 switches from the first state to the second state, the first drive unit 8 drives the first link 51 to rotate clockwise relative to the first leg support 2 (i.e., from...). Figure 1 Status to Figure 2 (In the state of...) The first link 51 rotates clockwise, causing the second link 52 to move backward, which in turn pulls the second leg support 3 to slide under the first leg support 2 until the second leg support 3 is at least partially hidden under the first leg support 2, and the upper surface of the second leg support 3 is lower than the upper surface of the first leg support 2.

[0054] In some embodiments, the second leg support 3 also has a third state (such as...). Figure 4 As shown, after the first drive unit 8 drives the second leg support 3 to switch from the second state to the first state, it continues to drive the first connecting rod 51 to rotate counterclockwise relative to the first leg support 2, thus switching the second leg support 3 to the third state. It can be understood that in the second and third states, the second leg support 3 is located on both sides of the extended plane of the upper surface of the second leg support 3, respectively. For example, in the second state, the second leg support 3 is completely or partially hidden below the first leg support 2, and in the third state, it is partially above the first leg support 2. In the third state, the front end of the second leg support 3 is higher than the upper surface of the first leg support 2, forming a support surface suitable for the user's needs in specific postures, such as raising the lower leg and foot. For example, in the second state, the second leg support 3 is completely or partially folded above the first leg support 2, and in the third state, it is partially below the first leg support 2. The relative height of the second leg support 3 and the first leg support 2 can be adjusted according to the user's needs in specific postures.

[0055] Optionally, the leg support structure may include a pair of first transmission units 5, which are arranged at intervals on both sides of the second leg support 3 in the width direction. The first drive unit 8 drives at least one of the two first transmission units 5. Arranging a pair of first transmission units 5 on both sides of the second leg support 3 can make the movement of the second leg support 3 more stable.

[0056] In some embodiments, the width of the second leg support 3 is smaller than that of the first leg support 2. This design allows the second leg support 3 to be completely or partially hidden under the first leg support 2 in the second state without affecting the overall aesthetics, and also facilitates the movement of the second leg support 3 under the first leg support 2.

[0057] In some embodiments, such as Figure 2 As shown, the second transmission unit 4 includes a synchronizing rod 6 and a pair of linkage mechanisms 7. The linkage mechanisms 7 are arranged opposite to each other on both sides of the first leg support 2, and both ends of the synchronizing rod 6 are connected to the linkage mechanisms 7 respectively. The connection through the synchronizing rod 6 ensures that the linkage mechanisms 7 on both sides move synchronously.

[0058] In some embodiments, such as Figure 2 , Figure 3 As shown, the linkage mechanism 7 includes at least a first short link 71, a first long link 72, a second long link 73, and a second short link 74. The first short link 71 and the first long link 72 are arranged in parallel, with one end of each adapted to connect to the seat 1. The second long link 73 and the second short link 74 are also arranged in parallel, with one end of each connected to the first leg rest 2. The other end of the first short link 71 is hinged to the other end of the second long link 73, and the other end of the first long link 72 is hinged to the other end of the second short link 74. The first long link 72 and the second long link 73 are cross-overlaid and hinged together at their midpoints. This scissor-like cross-connection design of the first short link 71, the first long link 72, the second long link 73, and the second short link 74 enables the second transmission unit 4 to achieve efficient transmission.

[0059] Furthermore, such as Figure 2 , Figure 3 As shown, the two ends of the synchronizing rod 6 are respectively connected to a pair of first long connecting rods 72 arranged opposite to each other, to ensure that the connecting rod mechanisms 7 on both sides of the first leg support 2 move synchronously and to prevent the first leg support 2 from tilting or twisting during the adjustment process.

[0060] Optionally, the synchronizing rod 6 is made of metal and has sufficient strength and rigidity to withstand the force and torque transmitted by the linkage mechanism 7.

[0061] In some embodiments, such as Figure 4As shown, the leg support structure also includes a second drive unit 9, which drives the second transmission unit 4 to switch the first leg support 2 between a fourth state and a fifth state. The fourth state corresponds to the retracted state of the first leg support 2, and the fifth state corresponds to the extended state of the first leg support 2. The second drive unit 9 includes a motor 91 and a lead screw 92. One end of the lead screw 92 is connected to the synchronizing rod 6, and the other end is connected to the output end of the motor 91. The motor 91 drives the lead screw 92 to move relative to the motor 91, thereby causing the second transmission unit 4 to extend, thus switching the first leg support 2 between the fourth and fifth states.

[0062] For example, in the fourth state, the first leg rest 2 is in the retracted position, close to the seat 1; in the fifth state, the first leg rest 2 is in the extended position, away from the seat 1. Switching between these two states allows the seat assembly to adapt to the needs of users of different heights, improving user comfort.

[0063] Preferably, the fourth state is the initial state of the first leg rest 2. When the seat assembly is in an unused state or the user gets up and leaves the seat, the first leg rest 2 automatically resets to the fourth state to ensure the neat appearance and compact structure of the seat assembly. After the first leg rest 2 unfolds from the fourth state to the fifth state, it needs to be reset to the fourth state after use until the next unfolding. This automatic reset function not only improves the ease of use of the seat assembly but also reduces the number of steps the user needs to take, further enhancing the user experience.

[0064] For example, the lead screw 92 is a threaded rod, which is connected to the nut on the synchronizing rod 6 by threads. When the motor 91 is running, the lead screw 92 rotates, driving the synchronizing rod 6 to move back and forth, thereby driving the linkage mechanism 7 to move and realize the extension and retraction of the first leg support 2.

[0065] In some embodiments, the motor 91 is a telescopic motor, which is a DC motor with high torque and low noise, and can smoothly drive the lead screw 92. The lead screw 92 is a high-precision ball screw with high transmission efficiency and low friction, and can convert the rotational motion of the telescopic motor 91 into linear motion to drive the second transmission unit 4 to extend or retract.

[0066] In some embodiments, the first drive unit 8 employs an electric push rod or a drive motor, capable of providing sufficient torque to drive the first connecting rod 51 to rotate. The first drive unit 8 is connected to a control panel via a controller, allowing the user to control the second leg support 3 to switch between a first state and a second state via buttons on the control panel.

[0067] In some embodiments, the first leg support 2 and the second leg support 3 are covered with a covering layer (not shown in the figure). The covering layer is made of a soft material, such as high-density sponge or memory foam, and is covered with leather or fabric to provide a comfortable feel and a good appearance. The thickness of the covering layer is moderate, providing sufficient comfort without being too soft to affect the support effect.

[0068] During use, when the user needs longer leg support, the first drive unit 8 can be activated via the control panel, driving the first link 51 to rotate counterclockwise, which in turn switches the second leg support 3 from the second state to the first state, extending the length of the leg support. When additional leg support is not needed, the first drive unit 8 can be activated again via the control panel, driving the first link 51 to rotate clockwise, which in turn switches the second leg support 3 from the first state back to the second state. The second leg support 3 is hidden below the first leg support 2, without affecting the overall aesthetics.

[0069] Meanwhile, users can also activate the second drive unit 9 via the control panel to switch the first leg rest 2 between the fourth and fifth states, adjusting the position of the first leg rest 2 relative to the seat 1 to adapt to different usage needs.

[0070] In some embodiments, the first transmission unit 5 may also adopt different structural forms. For example, the first transmission unit 5 may include four first connecting rods 51 and two second connecting rods 52. The four first connecting rods 51 are respectively disposed at the four corners of the first leg support 2, and the two second connecting rods 52 are respectively connected to the two first connecting rods 51 on both sides to form a stable support structure. The first drive unit 8 may drive the four first connecting rods 51 to rotate simultaneously, or drive the first connecting rods 51 on both sides to rotate separately, so as to drive the second leg support 3 to switch between the first state and the second state.

[0071] In some embodiments, the first drive unit 8 may employ different types of drive devices, such as hydraulic cylinders, pneumatic cylinders, or electromagnets. For example, the first drive unit 8 may employ a hydraulic cylinder, with the cylinder body fixed to the first leg support 2 and the piston rod connected to the first connecting rod 51. By controlling the flow direction and flow rate of hydraulic oil, the first connecting rod 51 is driven to rotate.

[0072] In some embodiments, the linkage mechanism 7 of the second transmission unit 4 can adopt different structural forms. For example, the linkage mechanism 7 may include two parallelogram linkage mechanisms 7, each parallelogram linkage mechanism 7 including two parallel long links and two parallel short links, the four links being connected by hinge points to form a parallelogram. The two parallelogram linkage mechanisms 7 are respectively disposed on both sides of the first leg support 2 and connected by a synchronizing rod 6 to ensure that the linkage mechanisms 7 on both sides move synchronously.

[0073] In some embodiments, the second drive unit 9 may also employ different types of drive devices, such as hydraulic cylinders, pneumatic cylinders, or electromagnets. For example, the second drive unit 9 may be a pneumatic cylinder, with the cylinder body fixed to the seat 1 and the piston rod connected to the second transmission unit 4. By controlling the flow direction and flow rate of the gas, the second transmission unit 4 is driven to extend or retract.

[0074] In some embodiments, during the posture adjustment process of the leg support structure, the second drive unit 9 works first, and after the angle adjustment of the first leg support 2 is completed, the first drive unit 8 drives the second leg support 3 to move relative to the first leg support 2.

[0075] In some embodiments, the covering layers of the first leg support 2 and the second leg support 3 can be made of different materials and have different structures. For example, the covering layers can have a multi-layer structure, with an inner layer of high-density sponge, a middle layer of memory foam, and an outer layer of leather or fabric, providing better comfort and support. The covering layers can also be designed to be removable for easy cleaning and replacement.

[0076] A seat assembly according to a second aspect of this application includes a seat 1 and a leg support structure as described above. The seat 1 includes a seat frame, a seat cushion, a backrest, and armrests. The seat frame is made of metal and has sufficient strength and rigidity to support the seat cushion, backrest, armrests, and leg support structure. The seat cushion is made of high-density foam and covered with leather or fabric to provide a comfortable seating experience. The backrest is angle-adjustable to accommodate different sitting postures. The armrests are height-adjustable to provide suitable arm support.

[0077] The leg rest structure is installed at the front of the seat 1. One end of the second transmission unit 4 is connected to the seat frame, and the other end is connected to the first leg rest 2. The second transmission unit 4 enables the first leg rest 2 to be adjusted relative to the seat frame, adjusting its height and angle to suit different usage needs. The first transmission unit 5 connects the first leg rest 2 and the second leg rest 3, allowing the second leg rest 3 to switch between a first state and a second state, extending or shortening its length.

[0078] The seat assembly also includes a control system, which comprises a controller, a control panel, and a power supply. The controller connects to the first drive unit 8 and the second drive unit 9, and controls the operation of the first drive unit 8 and the second drive unit 9 according to the instructions from the control panel. The control panel is mounted on the armrest of the seat 1 and includes multiple buttons for controlling various functions of the leg support structure. The power supply provides electrical power to the control system and drive units.

[0079] During use, users can control the position of the first leg rest 2 relative to the seat 1 and the position of the second leg rest 3 relative to the first leg rest 2 through the buttons on the control panel, so as to adjust the length and angle of the leg rests, meet the needs of users of different heights, and provide a more comfortable riding experience.

[0080] An automobile according to a third aspect of this application includes a leg rest structure as described in the first aspect embodiment or a seat assembly as described in the second aspect embodiment. The automobile includes a body, chassis, powertrain, transmission system, braking system, steering system, electrical system, and interior system. The seat assembly is installed in the automobile's interior system to provide a comfortable riding environment for the driver and passengers.

[0081] The leg rest structure or seat assembly is installed on the front seat 1 and / or rear seat 1 of a car, and is particularly suitable for models such as luxury cars, commercial vehicles, or RVs where high passenger comfort is required. The control system of the leg rest structure is connected to the car's electrical system and can be controlled via the car's central control screen or the control panel on the side of the seat 1.

[0082] During long-distance driving or riding, drivers and passengers can adjust the position and length of the leg rest structure to provide better leg support, reduce fatigue, and improve riding comfort. Especially in autonomous driving mode, the driver can adjust seat 1 to a more comfortable position and use the leg rest structure to provide full support for the legs, enjoying a more relaxed riding experience.

[0083] It should be noted that the first, second, and third embodiments are all types of leg support structures.

[0084] Other configurations and operations of the vehicle according to the embodiments of this application are known to those skilled in the art and will not be described in detail here.

[0085] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more. In the description of this application, "above" or "below" a second feature may include direct contact between the first and second features, or it may include contact between the first and second features not being in direct contact but through another feature between them.

[0086] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0087] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0088] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0089] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A leg support structure, characterized in that, include: First leg support (2) and second leg support (3); The first leg rest (2) is adapted to be rotatably connected to the seat (1); The second leg support (3) is connected to the first leg support (2); The second leg support (3) has a first state in which the upper surface of the second leg support (3) is flush with the upper surface of the first leg support (2).

2. The leg support structure according to claim 1, characterized in that, The second leg support (3) also has a second state in which the upper surface of the second leg support (3) is not flush with the upper surface of the first leg support (2).

3. The leg support structure according to claim 2, characterized in that, In the second state, the second leg support (3) at least partially overlaps with the first leg support (2), and in the first state, the second leg support (3) does not overlap with the first leg support (2).

4. The leg support structure according to claim 1, characterized in that, In the first state, the second leg support (3) abuts against the first leg support (2).

5. The leg support structure according to claim 2, characterized in that, The leg support structure also includes a first drive unit (8) and a first transmission unit (5); The second leg support (3) is connected to the first leg support (2) through the first transmission unit (5); The first drive unit 8 drives the first transmission unit 5 to switch the second leg support 3 between the first state and the second state.

6. The leg support structure according to claim 5, characterized in that, The first drive unit (8) drives at least a portion of the first transmission unit (5) to rotate relative to the first leg support (2). When the at least portion of the first transmission unit (5) rotates relative to the first leg support (2), it can drive the second leg support (3) to switch between the first state and the second state.

7. The leg support structure according to claim 6, characterized in that, The first transmission unit (5) includes at least two first connecting rods (51) and at least one second connecting rod (52); one end of the first connecting rod (51) is hinged to the first leg support (2), and the other end of the first connecting rod (51) is hinged to the second connecting rod (52); the second connecting rod (52) is connected to the second leg support (3). The first drive unit (8) drives the first link (9) to rotate relative to the first leg support (2) so as to drive the second leg support (3) to switch between the first state and the second state.

8. The leg support structure according to claim 7, characterized in that, The first leg support (2) includes an extension bracket (75) extending along the length of the first leg support (2), one end of the first connecting rod (9) is hinged to the extension bracket (75), and the second connecting rod (10) is parallel to the extension bracket (75).

9. The leg support structure according to claim 7, characterized in that: When the second leg support (3) switches from the second state to the first state, the first drive unit (8) drives the first link (51) to rotate counterclockwise relative to the first leg support (2); when the second leg support (3) switches from the first state to the second state, the first drive unit (8) drives the first link (51) to rotate clockwise relative to the first leg support.

10. The leg support structure according to claim 9, characterized in that: The second leg support (3) also has a third state. After the first drive unit (8) drives the second leg support (3) to switch from the second state to the first state, it continues to drive the first link (51) to rotate counterclockwise relative to the first leg support (2) so that the second leg support (3) switches to the third state.

11. The leg support structure according to claim 1, characterized in that, The width of the second leg support (3) is smaller than that of the first leg support (2).

12. The leg support structure according to claim 1, characterized in that, The leg support structure also includes a second drive unit (9) and a second transmission unit (4); the second transmission unit (4) includes a synchronizing rod (6) and a pair of linkage mechanisms (7); the linkage mechanisms (7) are arranged opposite to each other on both sides of the first leg support (2), and the two ends of the synchronizing rod (5) are respectively connected to the linkage mechanisms.

13. The leg support structure according to claim 12, characterized in that, The linkage mechanism (7) includes at least a first short link (71), a first long link (72), a second long link (73), and a second short link (74); the first short link (71) and the first long link (72) are arranged in parallel, and one end of the first short link (71) and one end of the first long link (72) are adapted to be connected to the seat; the second long link (73) and the second short link (74) are arranged in parallel, and one end of the second long link (73) and one end of the second short link (74) are connected to the first leg rest (2); the other end of the first short link (71) is hinged to the other end of the second long link (73), the other end of the first long link (72) is hinged to the other end of the second short link (74), and the first long link (73) and the second long link (402) are stacked in a cross pattern and hinged to each other at the middle.

14. The leg support structure according to claim 13, characterized in that, The two ends of the synchronizing rod (6) are respectively connected to a pair of first long connecting rods (403) arranged opposite to each other.

15. The leg support structure according to claim 12, characterized in that, The second drive unit (9) drives the second transmission unit (4) to switch the first leg support (2) between the fourth state and the fifth state.

16. The leg support structure according to claim 15, characterized in that, The second drive unit (9) includes a motor (91) and a lead screw (92). One end of the lead screw (92) can be connected to the synchronous rod (6), and the other end of the lead screw (92) is connected to the output end of the motor (91). The motor (91) drives the lead screw (92) to move relative to the motor (91), thereby driving the second transmission unit (4) to extend, so that the first leg support (2) switches between the fourth state and the fifth state.

17. The leg support structure according to any one of claims 1-16, characterized in that, The first leg support (2) and the second leg support (3) are covered with a covering layer on their outer sides.

18. A seat assembly, characterized in that, It includes a seat (1) and a leg support structure as described in any one of claims 1-17.

19. A car, characterized in that, Includes the leg support structure as described in any one of claims 1-17 or the seat assembly as described in claim 18.

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