Leg rest device, seat, vehicle

Abstract

The application provides a leg rest device, a seat and a vehicle. The leg rest device comprises a support, a rest plate part, a first transmission part, a second transmission part and a driving part. The rest plate part comprises a first rest plate and a second rest plate, and the second rest plate is movably connected to the first rest plate. The first transmission part is connected to the support and the first rest plate, and the support, the first transmission part and the first rest plate jointly provide an eight-link mechanism. The first transmission part is connected to the second transmission part to transmit power, and the second transmission part is connected to the second rest plate. The driving part is connected to the first transmission part to provide power to the first transmission part. When the driving part provides power to the first transmission part, the first transmission part moves to drive the first rest plate, thereby realizing the unfolding and folding of the rest plate part relative to the support. The first transmission part transmits power to the second transmission part, and the second transmission part moves to drive the second rest plate, thereby realizing the extension and retraction of the second rest plate relative to the first rest plate.

Description

Technical Field

[0001] This application relates to a leg rest device, a seat, and a vehicle. Background Technology

[0002] Currently, car seats, for example, are equipped with leg rests to provide support for the user's legs, thereby improving the user experience.

[0003] The leg rest needs to be able to be stowed away in the space under the seat cushion, and it also needs to be able to unfold and flip out when in use. However, insufficient unfolding distance of the leg rest can cause discomfort to the user's lower legs dangling in the air, and insufficient flipping angle results in an excessive angle of inclination of the support surface relative to the horizontal reference plane, which fails to provide effective upward support. Therefore, it is necessary to improve the unfolding and flipping effect of the leg rest; to adapt to the limited space under the seat cushion, the structure of the leg rest also needs to be optimized; the support plate also needs to provide a larger support area; and cost savings are also required.

[0004] In view of this, this application proposes a leg support device, a seat, and a vehicle to meet at least one or a combination of the above technical requirements. Utility Model Content

[0005] The purpose of this application is to provide a leg support device.

[0006] Another objective of this application is to provide a seat.

[0007] Another objective of this application is to provide a means of transportation.

[0008] A leg support device according to a first aspect of this application includes: a bracket, a support plate portion, a first transmission portion, a second transmission portion, and a drive portion; wherein, the support plate portion includes a first support plate and a second support plate, the second support plate being movably connected to the first support plate; the first transmission portion connects the bracket and the first support plate, the bracket, the first transmission portion, and the first support plate together provide an eight-bar linkage; the first transmission portion is connected to the second transmission portion to transmit power, and the second transmission portion is connected to the second support plate; the drive portion is connected to the first transmission portion and is used to provide power to the first transmission portion; when the drive portion provides power to the first transmission portion, the movement of the first transmission portion drives the first support plate, thereby realizing the expansion and retraction of the support plate portion relative to the bracket, and the first transmission portion transmits power to the second transmission portion, the movement of the second transmission portion drives the second support plate, thereby realizing the extension and retraction of the second support plate relative to the first support plate.

[0009] Compared to similar solutions, such as leg rest devices using four-bar or six-bar mechanisms (including the support plate and bracket), this application employs an eight-bar mechanism design with a bracket, a first transmission unit, and a first support plate. This design achieves better extension, retraction, and support effects, improving the user experience. The principle is as follows: the dimensions of each component (or link) of the multi-link mechanism of the leg rest device are limited by the height of the arrangement space provided under the seat cushion when the leg rest device is retracted. Under the condition of limited link dimensions, this application increases the linkage to an eight-bar mechanism, which can provide a larger displacement change in extension and rotation, facilitating a longer extension distance and a smaller tilt angle relative to the horizontal reference plane when unfolded. Thus, the support plate can extend a sufficient distance to support the user's lower legs, reducing the discomfort of the legs being suspended in the air and effectively providing upward support, improving the support effect of the leg rest device. Under the condition of limited displacement change in extension and rotation, increasing the linkage to an eight-bar mechanism allows each link to have a relatively small size, so the entire leg rest device can have a relatively small height when retracted, making it more suitable for arrangement spaces with limited height and facilitating compact arrangement. The design employing a second transmission unit and a second support plate allows the second support plate to extend and retract relative to the first support plate. Extending the second support plate increases the support area and the extension distance, while retracting it saves space. The design, where a drive unit provides power to the first transmission unit, which in turn transmits power to the second transmission unit, requires only one power source to achieve the unfolding and retraction of the support plate relative to the bracket, as well as the extension and retraction of the second support plate relative to the first support plate. Compared to solutions using multiple power sources, this achieves a compact and lightweight design, as well as cost savings.

[0010] In one or more embodiments of the leg support device, the first transmission unit includes: a first link, a second link, a third link, a fourth link, a fifth link, and a sixth link; wherein the first link and the second link are rotatably connected to the bracket; the third link is rotatably connected to the second link; the first link, the third link, and the fourth link are rotatably connected along the same axis; the fifth link is rotatably connected to the second link and the fourth link; the sixth link is rotatably connected to the fourth link; and the first support plate is rotatably connected to the fifth link and the sixth link.

[0011] In one or more embodiments of the leg support device, the second transmission part includes a guide rod; the guide rod is rotatably connected to the second support plate and is provided with a guide channel; the first transmission part is provided with a first guide block; the first support plate is provided with a second guide block; the first guide block and the second guide block are movably connected to the guide channel.

[0012] In one or more embodiments of the leg support device, the second transmission part includes a guide rod, a first guide block, and a second guide block; the guide rod is rotatably connected to the end of the second support plate and is provided with a guide channel; the first guide block is disposed at the end of the sixth link away from the first support plate; the second guide block is disposed at the end of the first support plate; and the first guide block and the second guide block are rotatably connected to the guide channel.

[0013] In one or more embodiments of the leg support device, the first support plate is movable relative to the bracket between an extended position and a retracted position, and the second support plate is movable relative to the first support plate between an extended position and a retracted position; furthermore, the leg support device is switchable between an extended state structure and a retracted state structure; the extended state structure is configured such that the first support plate is located in the extended position and the second support plate is located in the extended position; the retracted state structure is configured such that the first support plate is located in the retracted position and the second support plate is located in the retracted position.

[0014] In one or more embodiments of the leg support device, the first support plate rotates at an angle between the unfolded position and the retracted position in the range of 50° to 75°.

[0015] In one or more embodiments of the leg support device, it includes two brackets distributed on both sides along the width direction, two first transmission parts and two second transmission parts; the two first transmission parts are driven by the same drive part, and the two first transmission parts and the two second transmission parts are connected to both sides of the same support plate portion along the width direction.

[0016] In one or more embodiments of the leg support device, the drive unit includes a single motor and a lead screw and nut mechanism connected to the motor; the motor is capable of providing rotational motion to the lead screw and nut mechanism, which is capable of converting the rotational motion received from the motor into linear motion; the two ends of the lead screw and nut mechanism are respectively connected to the bracket and the first transmission unit to drive the first transmission unit; and / or, the eight-bar mechanism is provided with at least one compound hinge; and / or, the first support plate and the second support plate are movably connected by a guide rail slider mechanism.

[0017] A seat according to a second aspect of this application includes a seat cushion and a leg support device as described in the first aspect; wherein the bracket is fixedly connected to the seat cushion.

[0018] A means of transport according to a third aspect of this application includes a seat as described in the second aspect. Attached Figure Description

[0019] The above and other features, properties, and advantages of this application will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always denote the same features. It should be noted that these drawings are merely illustrative and are not drawn to scale, and should not be construed as limiting the scope of protection actually claimed by this application, wherein:

[0020] Figure 1 This is a schematic diagram of the leg support device in the retracted (left) and unfolded (right) states of a comparative scheme.

[0021] Figure 2 This is a structural schematic diagram of a seat and a vehicle according to one embodiment.

[0022] Figure 3 This is a schematic diagram of the planar structure of a leg support device in its retracted state, according to one embodiment.

[0023] Figure 4 This is a schematic diagram of the planar structure of a leg support device in an extended state according to an embodiment.

[0024] Figure 5 This is a three-dimensional structural diagram of a leg support device in its retracted state, according to one embodiment.

[0025] Figure 6 This is a three-dimensional structural diagram of a leg support device in an extended state according to an embodiment.

[0026] Figure 7 This is a simplified structural diagram of the leg support device in its retracted state, according to one embodiment.

[0027] Figure 8 This is a simplified structural diagram of the leg support device in its extended state according to one embodiment.

[0028] Figure label:

[0029] 1. Leg rest device; 2. Seat; 3. Vehicle;

[0030] 10. Bracket;

[0031] 20. Pallet section; 21. First pallet; 22. Second pallet; 23. Guide rail slider mechanism;

[0032] 30. First transmission unit; 31. First connecting rod; 32. Second connecting rod; 33. Third connecting rod; 34. Fourth connecting rod; 35. Fifth connecting rod; 36. Sixth connecting rod; 37. Horizontal tube;

[0033] 40. Second transmission unit; 41. Guide rod; 411. Guide channel; 42. First guide block; 43. Second guide block;

[0034] 50. Drive unit; 51. Motor; 52. Screw and nut mechanism; 53. Motor bracket;

[0035] 60. Seat cushion;

[0036] X. Composite hinge. Detailed Implementation

[0037] Reference will now be made in detail to various embodiments of this application, examples of which are shown in the accompanying drawings and described below. Although this application will be described in conjunction with exemplary embodiments, it should be understood that this application is not intended to be limited to those exemplary embodiments. Rather, this application is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents, and other embodiments that may be included within the spirit and scope of this application as defined by the appended claims.

[0038] This application uses specific terms to describe embodiments of the application. For example, "an embodiment" and / or "one embodiment" refers to a feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment" or "one embodiment" mentioned twice or more in different locations in this application does not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined. In the following description, the orientation or positional relationship indicated by terms such as "upper," "lower," "inner," "outer," "front," "rear," or other directional terms is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or component referred to must have a specific orientation, be constructed and / or implemented in a specific orientation, and therefore should not be construed as a limitation of the application. In this application, the terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying positional relationships or order of importance. In the following description, unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly; for example, they can refer to fixed connections or movable connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0039] It is understood that the leg support device and seat provided in this application are particularly suitable for automobiles, but can also be applied to other applicable occasions, such as rail trains, ships, aircraft and other means of transportation, as well as applicable fixed places, such as meeting rooms, auditoriums, cinemas, etc., as long as the seat can use the leg support device disclosed in the embodiments of this application, and is not limited thereto.

[0040] See Figures 3 to 8 The leg support device 1 shown includes: a bracket 10, a support plate 20, a first transmission part 30, a second transmission part 40, and a drive part 50. The bracket 10 mentioned here refers to the structure for mounting and fixing the leg support device 1, which is generally fixedly connected to the seat cushion 60 of the seat 2, such as... Figure 2 As shown. The support plate 20 includes a first support plate 21 and a second support plate 22. The second support plate 22 is movably connected to the first support plate 21. The first support plate 21 and the second support plate 22 provide a support surface for supporting the user's legs. A first transmission part 30 connects the bracket 10 and the first support plate 21. The bracket 10, the first transmission part 30, and the first support plate 21 together provide an eight-bar linkage. The movement of the first transmission part 30 can drive the first support plate 21 (support plate 20), thereby realizing the expansion and contraction of the support plate 20 relative to the bracket 10. In other words, the bracket 10, the first transmission part 30, and the first support plate 21 together provide a telescopic mechanism consisting of eight components (or links) connected by a lower pair. The expansion and contraction of the support plate 20 relative to the bracket 10 is also the extension and retraction of this eight-bar linkage. The first transmission part 30 is connected to the second transmission part 40 to transmit power. The second transmission unit 40 is connected to the second pallet 22, so that the movement of the second transmission unit 40 can drive the second pallet 22 to move relative to the first pallet 21 to achieve extension and retraction. The extension and retraction of the second pallet 22 relative to the first pallet 21 refer to the movement of the second pallet 22 relative to the first pallet 21, such that the overlapping portion of the first pallet 21 and the second pallet 22 decreases and increases, respectively. When the second pallet 22 extends, the overlapping portion with the first pallet 21 decreases, thereby providing a larger support area and extending the extension distance of the pallet portion 20; when the second pallet 22 retracts, the overlapping portion with the first pallet 21 increases, thereby more fully closing together. Figure 5 , Figure 6 As shown, the drive unit 50 is disposed on the bracket 10 and connected to the first transmission unit 30, for providing power to the first transmission unit 30. Generally, the drive unit 50 is equipped with a motor 51, but other structures may also be used, such as a pneumatic drive device or a hydraulic drive device to provide power, without limitation. When the drive unit 50 provides power to the first transmission unit 30, the movement of the first transmission unit 30 drives the first support plate 21, thereby realizing the unfolding and retraction of the first support plate 21 relative to the bracket 10. Furthermore, the first transmission unit 30 transmits power to the second transmission unit 40, and the movement of the second transmission unit 40 drives the second support plate 22, thereby realizing the extension and retraction of the second support plate 22 relative to the first support plate 21.

[0041] like Figure 1As shown, compared to comparative solutions, such as leg support devices 1a employing four-bar or six-bar mechanisms (including support plate 20a and bracket 10a), this application uses a bracket 10, a first transmission part 30, and a first support plate 21 to provide an eight-bar mechanism design, which can achieve better extension, retraction, and support effects, improving the user experience. The principle is that the dimensions of each component (or link) of the multi-bar mechanism of the leg support device are limited by the height of the arrangement space provided under the seat cushion when the leg support device is retracted. Under the condition of limited link dimensions, this application increases the number of links through an eight-bar mechanism design, providing a larger... The displacement changes during extension and rotation facilitate a longer unfolding distance L2 and a smaller tilt angle α2 relative to the horizontal reference plane. Therefore, the support plate 20 can extend sufficiently to support the user's lower legs, reducing discomfort from dangling legs and effectively providing upward support, thus improving the support effect of the leg support device 1. While limiting the displacement changes during extension and rotation, adding an eight-bar linkage allows each link to have a relatively small size, resulting in a relatively small height for the entire leg support device 1 when retracted, making it more suitable for spaces with limited height and facilitating compact arrangement. The design of the second transmission unit 40 and the second support plate 22 enables the extension and retraction of the second support plate 22 relative to the first support plate 21. This allows the second support plate 22 to extend to increase the support area and extend the extension distance, while retraction saves space. The design, which uses a drive unit 50 to provide power to the first transmission unit 30 and the first transmission unit 30 to transmit power to the second transmission unit 40, requires only one power source to enable the unfolding and retraction of the pallet 20 relative to the bracket 10, as well as the extension and retraction of the second pallet 22 relative to the first pallet 21. Compared with the comparative scheme that uses multiple power sources, this design achieves a compact and lightweight design and saves costs.

[0042] like Figures 3 to 8As shown, in some embodiments, the eight-bar linkage provided by the bracket 10, the first transmission part 30 and the first support plate 21 is provided with at least one composite hinge X; the use of composite hinge X is beneficial to simplifying the number of components and achieving compact design, etc. In some embodiments, the first transmission unit 30 includes: a first link 31, a second link 32, a third link 33, a fourth link 34, a fifth link 35, and a sixth link 36; wherein the first link 31 and the second link 32 are rotatably connected to the bracket 10; the third link 33 is rotatably connected to the second link 32; the first link 31, the third link 33, and the fourth link 34 are rotatably connected along a coaxial line to provide a compound hinge X; the fifth link 35 is rotatably connected to the second link 32 and the fourth link 34; the sixth link 36 is rotatably connected to the fourth link 34; the first support plate 21 is rotatably connected to the fifth link 35 and the sixth link 36; when the driving member, such as the second link 32, is driven by the drive unit 50, the links are linked together, thereby causing the support plate 20 to unfold and retract relative to the bracket 10.

[0043] like Figures 3 to 6 As shown, in some embodiments, the second transmission part 40 includes a guide rod 41, a first guide block 42, and a second guide block 43. The guide rod 41 is rotatably connected to the second pallet 22 and is provided with a guide channel 411. The guide channel 411 is, for example, the arc-shaped groove shown in the figure. The first guide block 42 is disposed on the first transmission part 30. The second guide block 43 is disposed on the first pallet 21. The first guide block 42 and the second guide block 43 are movably connected to the guide channel 411. When the first transmission part 30 is active, the first transmission part 30 can transmit power to the second transmission part 40 through the cooperation of the first guide block 42, the second guide block 43, and the guide channel 411, thereby driving the second pallet 22 to move relative to the first pallet 21. The design of the first guide block 42 and the second guide block 43 being movably connected to the guide channel 411 makes the second transmission part 40 occupy only space in the vicinity of the guide rod 41, simplifying the structure and facilitating compact arrangement.

[0044] like Figures 3 to 6As shown, in some embodiments, the leg support device 1 can be configured such that the first transmission unit 30 adopts the design of the first link 31, second link 32, third link 33, fourth link 34, fifth link 35, and sixth link 36 described above, and the second transmission unit 40 adopts the design of the guide rod 41, first guide block 42, and second guide block 43 described above, which will not be repeated here; wherein, the guide rod 41 is rotatably connected to the end of the second support plate 22; the first guide block 42 is disposed at the end of the sixth link 36 away from the first support plate 21; the second guide rod 41 is rotatably connected to the end of the second support plate 22; the second ... Guide block 43 is disposed at the end of first pallet 21; this design facilitates the compact arrangement of first transmission part 30, second transmission part 40 and pallet part 20; in some embodiments, first guide block 42 and second guide block 43 are rotatably connected in guide channel 411; for example, first guide block 42 and second guide block 43 may be configured with rollers, and the second guide block may also be disposed at a rotatable connection position between fourth link 34 and sixth link 36, so that the second guide block 43 is integrally configured with the pivot member at that position, without limitation.

[0045] like Figures 2 to 6 As shown, in some embodiments, the first tray 21 is movable relative to the support 10 between an extended position and a retracted position, and the second tray 22 is movable relative to the first tray 21 between an extended position and a retracted position. The extended and retracted positions refer to the extreme positions that the tray portion 20 can reach relative to the support 10, respectively. The extended and retracted positions refer to the extreme positions that the second tray 22 can reach relative to the first tray 21 when the overlapping portion of the first tray 21 and the second tray 22 decreases and increases, respectively. Furthermore, the leg support device 1 can switch between an extended state structure and a retracted state structure. In the extended state structure, the first tray 21 is in the extended position and the second tray 22 is in the extended position; in the retracted state structure, the first tray 21 is in the retracted position and the second tray 22 is in the retracted position. Figure 2 As shown, when using the leg support device 1, the leg support device 1 is switched to the extended state structure, so that the support plate 20 moves to the unfolded position to extend and flip to the position corresponding to the user's lower leg, so as to provide a better support effect, and the second support plate 22 reaches the extended position, so that the support plate 20 provides a support surface with a larger support area, improving the user experience; when not using the leg support device 1, the leg support device 1 is switched to the retracted state structure, so that the support plate 20 is retracted to the retracted position close to the bracket 10, and the first support plate 21 and the second support plate 22 fully overlap to save space.

[0046] like Figures 1 to 6As shown, in some embodiments, the tray portion 20, such as the first tray 21, has a flip angle between the unfolded and retracted positions that is in the range of 50° to 75°; the flip angle referred to here is the absolute difference between the tilt angles α2 and α1 of the tray relative to the horizontal reference plane when the tray is in the unfolded and retracted positions; this design facilitates the realization that when the tray portion 20 is retracted, its support surface extends approximately along the height direction to save space; and when the tray portion 20 is unfolded, its support surface can effectively provide upward support, resulting in a better user experience.

[0047] like Figure 5 , Figure 6 As shown, in some embodiments, the leg support device 1 includes two supports 10, two first transmission parts 30, and two second transmission parts 40 distributed on both sides along the width direction; the first transmission parts 30 on both sides are driven by the same drive part 50 and can move synchronously; for example, a horizontal tube 37 is provided between the two second connecting rods 32 of the two first transmission parts 30 to ensure synchronous movement, and the output end of a single drive part 50 is connected to the horizontal tube 37 to provide power, so that the power provided by the single drive part 50 can be transmitted to the two first transmission parts 30 on both sides through the horizontal tube 37; and the two first transmission parts 30 and the two second transmission parts 40 are connected to both sides of the same support plate part 20 in the width direction; with this design, both sides of the support plate part 20 can be driven and supported by a set of supports 10, first transmission parts 30, and second transmission parts 40 respectively, which is beneficial to make the leg support device move smoothly and has a strong load-bearing capacity.

[0048] like Figure 5 , Figure 6As shown, in some embodiments, the drive unit 50 includes a single motor 51 and a lead screw and nut mechanism 52 connected to the motor 51; the lead screw and nut mechanism 52 includes a mating lead screw and a nut; the motor 51 is capable of providing rotational motion to the lead screw and nut mechanism 52, and the lead screw and nut mechanism 52 is capable of converting the rotational motion received from the motor 51 into relative movement between the lead screw and the nut, thereby providing linear motion; both ends of the lead screw and nut mechanism 52 are rotatably connected to the bracket 10 and the first transmission unit 30, respectively, thereby driving the first drive unit 50 by providing linear motion; specifically, the motor 51 can be configured such that the motor 51 is mounted on the brackets on both sides via a motor bracket 53. Between the brackets 10, one end of the lead screw and nut mechanism 52 is mounted on the motor bracket 53 and connected to the motor 51 to receive power from the motor 51, and the other end is rotatably connected to the horizontal tube 37 between the second connecting rods 32 on both sides. Thus, the linear motion provided by the lead screw and nut mechanism 52 can drive the first connecting rod 31 to rotate relative to the bracket 10, so that the first transmission part 30 is linked. A gearbox or other reduction device can also be configured between the motor 51 and the lead screw and nut mechanism 52. The drive part 50 can also be configured with other structures, such as the angle-adjusting motor 51 commonly used in the art, to drive the first connecting rod 31 to rotate relative to the bracket 10, and is not limited thereto.

[0049] like Figure 6 As shown, in some embodiments, the pallet portion 20 is provided with a guide rail slider mechanism 23; the guide rail slider mechanism 23 includes a cooperating guide rail and a slider, one of which is disposed on the first pallet 21 and the other is disposed on the second pallet 22; the first pallet 21 and the second pallet 22 are movably connected to each other through the guide rail slider mechanism 23.

[0050] like Figure 2 The seat 2 shown includes a seat cushion 60 and a leg support device 1; wherein the bracket 10 of the leg support device 1 is fixedly connected to the seat cushion 60.

[0051] like Figure 2 The vehicle 3 shown is, for example, a car, which includes seats 2.

[0052] In summary, the beneficial technical effects of this application include, but are not limited to, at least one of the following:

[0053] Compared to comparative solutions, such as leg rest devices using four-bar or six-bar mechanisms (including the support plate and bracket), this application employs an eight-bar mechanism design with a bracket, a first transmission unit, and a first support plate. This design achieves better extension, retraction, and support effects, improving the user experience. The principle is as follows: the dimensions of each component (or link) of the multi-link mechanism of the leg rest device are limited by the height of the arrangement space provided under the seat cushion when the leg rest device is retracted. Under the condition of limited link dimensions, this application increases the number of links through the design of an eight-bar mechanism, which can provide a larger displacement change in extension and rotation, facilitating a longer unfolding distance and a smaller tilt angle relative to the horizontal reference plane when unfolded. Thus, the support plate can extend a sufficient distance to support the user's lower legs, reducing the discomfort of the legs being suspended in the air and effectively providing upward support, improving the support effect of the leg rest device. Under the condition of limited displacement change in extension and rotation, increasing the number of links to an eight-bar mechanism allows each link to have a relatively small size. Therefore, the entire leg rest device can have a relatively small height when retracted, making it more suitable for arrangement spaces with limited height and facilitating compact arrangement. The design employing a second transmission unit and a second support plate allows the second support plate to extend and retract relative to the first support plate. Extending the second support plate increases the support area and the extension distance, while retracting it saves space. The design, where a drive unit provides power to the first transmission unit, which in turn transmits power to the second transmission unit, requires only one power source to achieve the unfolding and retraction of the support plate relative to the bracket, as well as the extension and retraction of the second support plate 22 relative to the first support plate. Compared to solutions requiring multiple power sources, this achieves a compact and lightweight design, as well as cost savings.

[0054] While this application discloses preferred embodiments as described above, it is not intended to limit the scope of this application. Any changes and modifications can be made by those skilled in the art without departing from the spirit and scope of this application. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application, without departing from the content of the technical solution of this application, fall within the protection scope defined by the claims of this application.

Claims

1. A leg rest device (1) characterized in that, include: The bracket (10), the tray section (20), the first transmission section (30), the second transmission section (40), and the drive section (50); wherein, The pallet section (20) includes a first pallet (21) and a second pallet (22), wherein the second pallet (22) is movably connected to the first pallet (21); The first transmission part (30) connects the bracket (10) and the first support plate (21), and the bracket (10), the first transmission part (30) and the first support plate (21) together provide an eight-bar linkage; The first transmission part (30) is connected to the second transmission part (40) to transmit power, and the second transmission part (40) is connected to the second pallet (22); The drive unit (50) is connected to the first transmission unit (30) and is used to provide power to the first transmission unit (30); When the drive unit (50) provides power to the first transmission unit (30), the movement of the first transmission unit (30) drives the first tray (21), thereby enabling the tray (20) to unfold and retract relative to the bracket (10). Furthermore, the first transmission unit (30) transmits power to the second transmission unit (40), and the movement of the second transmission unit (40) drives the second tray (22), thereby enabling the second tray (22) to extend and retract relative to the first tray (21).

2. Leg rest device (1) according to claim 1, characterized in that The first transmission unit (30) includes: a first link (31), a second link (32), a third link (33), a fourth link (34), a fifth link (35), and a sixth link (36); wherein the first link (31) and the second link (32) are rotatably connected to the bracket (10); the third link (33) is rotatably connected to the second link (32); the first link (31), the third link (33), and the fourth link (34) are rotatably connected along the same axis; the fifth link (35) is rotatably connected to the second link (32) and the fourth link (34); the sixth link (36) is rotatably connected to the fourth link (34); and the first support plate (21) is rotatably connected to the fifth link (35) and the sixth link (36).

3. Leg rest device (1) according to claim 1, characterized in that The second transmission part (40) includes a guide rod (41), a first guide block (42), and a second guide block (43); the guide rod (41) is rotatably connected to the second pallet (22) and is provided with a guide channel (411); the first guide block (42) is disposed on the first transmission part (30); the second guide block (43) is disposed on the first pallet (21); the first guide block (42) and the second guide block (43) are movably connected to the guide channel (411).

4. Leg rest device (1) according to claim 2, characterized in that The second transmission part (40) includes a guide rod (41), a first guide block (42), and a second guide block (43); the guide rod (41) is rotatably connected to the end of the second pallet (22) and is provided with a guide channel (411); the first guide block (42) is disposed at the end of the sixth link (36) away from the first pallet (21); the second guide block (43) is disposed at the end of the first pallet (21); and the first guide block (42) and the second guide block (43) are rotatably connected to the guide channel (411).

5. The leg rest device (1) according to claim 1, characterized in that The first tray (21) is movable relative to the bracket (10) between an extended position and a retracted position, and the second tray (22) is movable relative to the first tray (21) between an extended position and a retracted position; and the leg support device (1) is capable of switching between an extended state structure and a retracted state structure. The extended state structure is configured such that the first support plate (21) is located in the unfolded position and the second support plate (22) is located in the extended position; The retracted state structure is configured such that the first tray (21) is located in the retracted position and the second tray (22) is located in the retracted position.

6. The leg support device (1) according to claim 5, characterized in that, The flip angle of the pallet portion (20) between the unfolded position and the retracted position is in the range of 50° to 75°.

7. The leg rest device (1) according to claim 1, characterized in that It includes two brackets (10) distributed on both sides along the width direction, two first transmission parts (30) and two second transmission parts (40); the two first transmission parts (30) are driven by the same drive part (50), and the two first transmission parts (30) and the two second transmission parts (40) are connected to both sides of the same pallet part (20) along the width direction.

8. Leg rest device (1) according to claim 1, characterized in that The drive unit (50) includes a single motor (51) and a lead screw and nut mechanism (52) connected to the motor (51); the motor (51) is capable of providing rotational motion to the lead screw and nut mechanism (52), which is capable of converting the rotational motion received from the motor (51) into linear motion; the two ends of the lead screw and nut mechanism (52) are respectively connected to the bracket (10) and the first transmission unit (30) to drive the first transmission unit (30); and / or, The eight-bar linkage is provided with at least one compound hinge; and / or, The first tray (21) and the second tray (22) are movably connected by a guide rail slider mechanism (23).

9. A seat (2) characterized in that It includes a seat cushion (60) and a leg support device (1) as claimed in any one of claims 1 to 8; wherein the bracket (10) is fixedly connected to the seat cushion (60).

10. A vehicle (3) characterized by Includes the seat (2) as described in claim 9.

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