A seat device and a seat

Abstract

The application discloses a seat device and a seat, the seat device comprises a base assembly, a leg assembly, a back assembly, a first movement assembly and a second movement assembly, the seat device has a sitting state, a TV state and a lying state, when the seat device switches between the sitting state and the TV state, the first swing component rotates relative to the movable base and drives the leg assembly to stretch or contract, the second swing component is relatively static with the movable base, and the angle of the movable base and the back assembly is unchanged; when the seat device switches between the TV state and the lying state, the first swing component is relatively static with the movable base, the leg assembly is stretched, the second swing component rotates relative to the movable base, and the movable base and the back assembly are adjusted in angle; the seat device can be adjusted to three states, and the diversified resting postures of users are fully met.

Description

Technical Field

[0001] This application relates to the field of furniture technology, and in particular to a seating device and a seat. Background Technology

[0002] The TV posture of the seating is an ergonomic sitting position designed for relaxation. In this posture, the seat cushion maintains an angle similar to that of a conventional sitting posture; at the same time, the leg rest is significantly raised, creating a comfortable angle between the thighs and calves. This effectively relieves fatigue from prolonged sitting, avoids the pressure on the knees caused by traditional sitting postures, and is more conducive to spinal stability than lying completely flat.

[0003] Most current seating with posture adjustment functions only support switching between sitting and reclining modes. When transitioning from a sitting to a reclining position, the leg rest height, seat cushion angle, and backrest angle all change simultaneously, making it impossible to adjust the leg rest height independently. This design limitation makes it difficult for existing seating to achieve a fully extended "TV" posture, thus failing to fully meet users' needs for diverse resting postures. Utility Model Content

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a seating device capable of accommodating sitting, TV-like, and reclining postures.

[0005] This application also proposes a seating arrangement having the aforementioned seating device.

[0006] According to a first aspect embodiment of the present application, the seating device includes a base assembly, a leg assembly, a back assembly, a first motion assembly, and a second motion assembly. The base assembly includes a movable base and a fixed base with adjustable relative positions. The leg assembly is hinged to the movable base and extends or retracts by rotation relative to the movable base. The back assembly includes a back connecting member, a first back link, a second back link hinged to the movable base, and a third back link hinged to the second swing member. The back assembly is angle-adjustable by rotation relative to the movable base. The first motion assembly includes a swing mechanism and a support mechanism hinged to the fixed base. The swing mechanism includes a hinge... A first swing component is connected to the movable base, and the support mechanism and the leg assembly are respectively connected to the swing mechanism; when the first swing component rotates relative to the movable base, the leg assembly extends or retracts; the support mechanism includes a first support rod and a second support rod hinged to each other, the first support rod is hinged to the fixed base, and the second support rod is hinged to the movable base; the second motion assembly includes a support component hinged to the fixed base and a second swing component hinged to the movable base, the support component and the back assembly are respectively hinged to the second swing component; when the second swing component rotates relative to the movable base, the back assembly adjusts its angle.

[0007] The seating device according to the embodiments of this application has at least the following beneficial effects: the seating device has a sitting position, a TV position, and a reclining position. When the seating device switches between the sitting position and the TV position, the first swinging component rotates relative to the movable base and drives the leg assembly to extend or retract. The second support rod contacts the first limiting component to support the movable base, while the second swinging component remains relatively stationary with respect to the movable base, ensuring that the angle between the movable base and the back assembly remains unchanged. When the seating device switches between the TV position and the reclining position, the first swinging component remains relatively stationary with respect to the movable base, ensuring that the leg assembly extends, while the second swinging component rotates relative to the movable base and drives the angle between the movable base and the back assembly to adjust. Therefore, the seating device of this application can be adjusted to three states, fully meeting the user's needs for diverse resting postures.

[0008] According to some embodiments of this application, the movable base is provided with a first limiting component, which is used to limit the rotation of the second support rod relative to the movable base. When the second support rod contacts the first limiting component, the support mechanism supports the movable base.

[0009] According to some embodiments of this application, the backrest assembly includes a backrest connecting component, a first backrest link, a second backrest link hinged to the movable base, and a third backrest link hinged to the second swing component. The backrest connecting component includes a second connecting portion and a first connecting portion for connecting the backrest. The first connecting portion and the second connecting portion are angled together. One end of the first backrest link is hinged to the second connecting portion, and the other end is hinged to the second swing component. One end of the second backrest link is hinged to the second connecting portion, and the other end is hinged to the third backrest link.

[0010] According to some embodiments of this application, the back connecting member is provided with a third limiting member, which is used to limit the rotation of the back connecting member relative to the first back connecting rod. When the third limiting member contacts the first back connecting rod, the angle between the first connecting part and the movable base is at its minimum value.

[0011] According to some embodiments of this application, the second back link is provided with a fourth limiting component, which is used to limit the rotation of the back connecting component relative to the second back link. When the fourth limiting component contacts the second connecting part, the angle between the first connecting part and the movable base is at its maximum value.

[0012] According to some embodiments of this application, the seat device further includes a linkage component, one end of which is hinged to the second support rod and the other end of which is hinged to the second swing component. The second support rod is provided with a sixth limiting component, which is used to limit the rotation of the linkage component relative to the second support rod. When the third extension contacts the sixth limiting component, the linkage component supports the second support rod.

[0013] According to some embodiments of this application, the first swinging component is provided with a seventh limiting component. When the linkage component contacts the seventh limiting component, the seventh limiting component is used to limit the movement of the linkage component, so as to restrict the rotation of the second swinging component through the linkage component.

[0014] According to some embodiments of this application, the seat device further includes a drive assembly for driving the seat device to perform posture changes. The drive assembly includes a slide rail and a slider. The slide rail is fixedly disposed on the fixed base. The movable base is provided with a rotatable first crossbeam. The first crossbeam is provided with a transmission assembly. The slider is connected to the first crossbeam through the transmission assembly. The first crossbeam is connected to the leg assembly through the transmission assembly.

[0015] According to some embodiments of this application, when the slider slides in the first section of the slide rail, the slider drives the first crossbeam to rotate, so as to drive the leg assembly to extend and retract through the transmission assembly; when the slider slides in the second section of the slide rail, the slider drives the movable base to adjust its angle, so as to drive the second swing component to swing.

[0016] According to some embodiments of this application, the transmission assembly includes a first transmission rod, a second transmission rod, and a third transmission rod. One end of the first transmission rod is hinged to the slider, and the other end is connected to the first crossbeam. One end of the second transmission rod is fixedly connected to the first crossbeam, and the other end is hinged to the third transmission rod. The third transmission rod is hinged to the leg assembly.

[0017] According to some embodiments of this application, the seat device further includes a support leg assembly for supporting the seat device, the support leg assembly connecting the first support rod and the fixed base, and the support leg assembly extending or retracting when the first support rod rotates relative to the fixed base.

[0018] According to some embodiments of this application, the support leg assembly includes a first support leg link and a second support leg link. One end of the first support leg link is hinged to the first support rod, and the other end is provided with a roller. One end of the second support leg link is hinged to the first support leg link, and the other end is hinged to the fixed base.

[0019] According to some embodiments of this application, the first support leg link is provided with an eighth limiting component and a ninth limiting component, the eighth limiting component and the ninth limiting component being used to restrict the rotation of the second support leg link relative to the first support leg link; when the second support leg link contacts the eighth limiting component, the support leg assembly retracts to its limit position in the direction closer to the first support rod; when the second support leg link contacts the ninth limiting component, the support leg assembly extends to its limit position in the direction away from the first support rod.

[0020] According to some embodiments of this application, when the seat device switches between a sitting position and a TV position, the first backrest link and the second backrest link remain relatively stationary with respect to the movable base; when the seat device switches between a TV position and a reclining position, the first backrest link and the second backrest link rotate relative to the movable base.

[0021] According to a second aspect embodiment of this application, the seating includes the aforementioned seat device, which has a sitting posture, a TV posture, and a reclining posture.

[0022] When the seat device is in a sitting position, the first swing component is located at the extreme position in the first rotation direction, and the second swing component is located at the extreme position in the third rotation direction.

[0023] When the seat device is in the TV posture state, the first swing component is located at the extreme position in the second rotation direction, and the second swing component is located at the extreme position in the third rotation direction.

[0024] When the seat is in a reclining position, the first swing component is at its limit position in the second rotation direction, and the second swing component is at its limit position in the fourth rotation direction.

[0025] Wherein, the second rotation direction is the opposite direction of the first rotation direction, and the fourth rotation direction is the opposite direction of the third rotation direction.

[0026] The seating device according to the embodiments of this application has at least the following beneficial effects: The seating device of the first aspect of this application has a sitting position, a TV position, and a reclining position. When the seating device switches between the sitting position and the TV position, the first swinging component rotates relative to the movable base, driving the leg assembly to extend or retract. The second support rod contacts the first limiting component to support the movable base, while the second swinging component remains relatively stationary with respect to the movable base, ensuring that the angle between the movable base and the backrest assembly remains unchanged. When the seating device switches between the TV position and the reclining position, the first swinging component remains relatively stationary with respect to the movable base, ensuring that the leg assembly extends, while the second swinging component rotates relative to the movable base, driving the angle adjustment between the movable base and the backrest assembly. Therefore, the seating device of this application can be adjusted to three states, fully meeting the user's needs for diverse resting postures.

[0027] 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

[0028] The present application will be further illustrated below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments illustrated in the following drawings are exemplary and are only used to explain the present application, and should not be construed as limiting the present application.

[0029] Figure 1 This is a schematic diagram of the seat device in a sitting position according to an embodiment of this application;

[0030] Figure 2 This is an inner schematic diagram of the seat device in a sitting position according to an embodiment of this application;

[0031] Figure 3This is an external schematic diagram of the seat device in a sitting position according to an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the seat device in the TV posture state according to an embodiment of this application;

[0033] Figure 5 This is an inner schematic diagram of the seat device in the TV posture state according to an embodiment of this application;

[0034] Figure 6 This is an external schematic diagram of the seat device in the TV posture state according to an embodiment of this application;

[0035] Figure 7 This is a schematic diagram of the seat device in a reclining position according to an embodiment of this application;

[0036] Figure 8 This is an inner schematic diagram of the seat device in a reclining position according to an embodiment of this application;

[0037] Figure 9 This is an external schematic diagram of the seat device in a reclining position according to an embodiment of this application;

[0038] Figure 10 This is a schematic diagram of the installation of the backrest assembly in the seat device according to an embodiment of this application;

[0039] Figure 11 This is a schematic diagram of the linkage component in the seat device of this application embodiment;

[0040] Figure 12 This is a schematic diagram of the structure of the first swinging component in the seat device of this application embodiment;

[0041] Figure 13 This is a schematic diagram of the structure of the second swinging component in the seat device of this application embodiment.

[0042] Figure label:

[0043] 101. Movable base; 102. Fixed base;

[0044] 200. Leg assembly; 201. First leg link; 202. Second leg link; 203. Leg telescopic mechanism;

[0045] 300. Back assembly; 301. Back connecting member; 3011. First connecting part; 3012. Second connecting part; 302. First back connecting rod; 303. Second back connecting rod; 304. Third back connecting rod; 305. Third limiting member; 306. Fourth limiting member; 307. First limiting edge; 308. Protrusion; 309. Second limiting edge; 310. Fifth limiting member;

[0046] 400. Swinging mechanism; 401. First swinging component; 4011. First extension; 4012. Second extension; 402. First connecting rod; 403. Second connecting rod; 404. Seventh limiting component;

[0047] 500. Support mechanism; 501. First support rod; 502. Second support rod; 503. First limiting component;

[0048] 601. Support component; 602. Second swing component; 603. Second limiting component; 604. Linkage component; 6041. Third extension; 6042. Fourth extension; 605. Sixth limiting component;

[0049] 700. Support leg assembly; 701. First support leg link; 702. Second support leg link; 703. Roller; 704. Eighth limiting component; 705. Ninth limiting component;

[0050] 800. Drive assembly; 801. Slide rail; 802. Slider; 803. First crossbeam; 804. First transmission rod; 805. Second transmission rod; 806. Third transmission rod. Detailed Implementation

[0051] The embodiments of this application are described in detail below with reference to 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.

[0052] In the description of this application, it should be understood that the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are 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.

[0053] In the description of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0054] In the description of this application, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0055] In the description of this application, the use of terms such as "one embodiment," "some embodiments," "an example," "some instances," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples" indicates that the 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.

[0056] like Figure 1 and Figure 2 As shown in the figure, this application provides a seat device, which includes a base assembly, a leg assembly 200, a back assembly 300, a first motion assembly, and a second motion assembly.

[0057] The base assembly includes a movable base 101 and a fixed base 102. The fixed base 102 is fixed in position, while the movable base 101 can move relative to the fixed base 102, thereby adjusting the position and angle of the movable base 101. A leg assembly 200 is hinged to the movable base 101 and is used to mount a leg rest. The leg assembly 200 can extend and retract relative to the movable base 101, thereby adjusting the position and height of the leg rest. A backrest assembly 300 is hinged to the movable base 101 and is used to mount a backrest. The backrest assembly 300 can also move relative to the movable base 101, thereby adjusting the position and angle of the backrest. The movable base 101, leg assembly 200, and backrest assembly 300 are linked to ensure synchronized movement.

[0058] It is worth noting that, such as Figure 4 As shown, the seat device of this application is different from seat devices that only have sitting and reclining positions. In addition to having sitting and reclining positions, the seat device of this application can also be adjusted to a TV position.

[0059] Specifically, such as Figure 2 and Figure 3As shown, when the seat is in a seated position, the leg assembly 200 retracts to the bottom of the movable base 101, and the angle α between the backrest of the backrest assembly 300 and the movable base 101 is at its minimum; Figure 5 and Figure 6 As shown, when the seat is in the TV position, the leg assembly 200 is fully extended, and the angle α between the backrest mounted on the backrest assembly 300 and the movable base 101 remains at its minimum value; Figure 8 and Figure 9 As shown, when the seat is in a reclining position, the leg assembly 200 remains fully extended, and the angle α between the backrest mounted on the backrest assembly 300 and the movable base 101 is adjusted to its maximum value.

[0060] Furthermore, the seat mechanism needs to be converted to a TV position first when changing from a sitting position to a reclining position, and similarly, the seat mechanism also needs to be converted to a TV position first when changing from a reclining position to a sitting position.

[0061] During the posture changes of the seating device, the movable base 101 also moves relative to the fixed base 102. Specifically, when the seating device changes from a sitting position to a TV position, the movable base 101 moves towards the front of the seating device, but the angle of the movable base 101 relative to the fixed base 102 does not change; when the seating device changes from a TV position to a reclining position, the movable base 101 moves towards the front of the seating device, and the angle of the movable base 101 relative to the fixed base 102 gradually increases. Specifically, the front of the seating device refers to the side of the seating device where the leg assembly is located.

[0062] It is understandable that the process of the seat changing from a TV position to a sitting position is the reverse of the process of the seat changing from a sitting position to a TV position, and the process of the seat changing from a reclining position to a TV position is the reverse of the process of the seat changing from a TV position to a reclining position. This will not be elaborated further here.

[0063] In addition, such as Figure 5 and Figure 12 As shown, the first motion component includes a first swinging member 401. When the leg assembly 200 performs a telescopic movement, the first swinging member 401 swings relative to the movable base 101, that is, when the seat device switches between a sitting position and a TV position, the first swinging member 401 swings. However, when the seat device switches between a TV position and a reclining position, since the leg assembly 200 does not perform a telescopic movement, the first swinging member 401 remains relatively stationary with respect to the movable base 101 and does not swing.

[0064] At the same time, such as Figure 5 and Figure 13As shown, the second motion component includes a second swinging member 602. When the backrest assembly 300 moves, the second swinging member 602 swings relative to the movable base 101, that is, when the seat device switches between a reclining position and a TV position, the second swinging member 602 swings. However, when the seat device switches between a sitting position and a TV position, since the backrest assembly 300 does not move, the second swinging member 602 remains stationary relative to the movable base 101 and does not swing.

[0065] In some examples, such as Figure 5 As shown, the first motion assembly includes a swing mechanism 400 and a support mechanism 500. The swing mechanism 400 includes the aforementioned first swing component 401, which is hinged to the movable base 101. The first swing component 401 achieves its swinging process by rotating relative to the movable base 101. When the seat device switches between a sitting position and a TV position, the first swing component 401 is used to control the movement of the movable base 101 and the support mechanism 500.

[0066] The support mechanism 500 is hinged to the fixed base 102, meaning that the support mechanism 500 can rotate relative to the fixed base 102. Furthermore, the support mechanism 500 is used to support the movable base 101. It can be understood that when the support mechanism 500 supporting the movable base 101 moves, the movable base 101 also moves accordingly.

[0067] Meanwhile, the support mechanism 500 is connected to the first swing component 401, which facilitates the first swing component 401 to drive the support mechanism 500 to rotate relative to the fixed base 102 during the swinging process.

[0068] Furthermore, the first swinging component 401 is also connected to the leg assembly 200; therefore, the movable base 101, the support mechanism 500, and the leg assembly 200 are all connected to the first swinging component 401. When the leg assembly 200 extends or retracts, it drives the first swinging component 401 to swing relative to the movable base 101. During the swinging process, the first swinging component 401 drives the support mechanism 500 to rotate relative to the fixed base 102, thereby adjusting the position of the movable base 101.

[0069] In some examples, such as Figure 5 and Figure 6 As shown, the second motion component includes a support member 601 and a second swing member 602. The second swing member 602 is hinged to the movable base 101, and the second swing member 602 achieves its swinging process by rotating relative to the movable base 101. When the seat device switches between a TV posture state and a reclining state, the second swing member 602 is used to control the movement of the backrest assembly 300.

[0070] The support member 601 is formed as a rod-shaped structure, with one end hinged to the fixed base 102 and the other end hinged to the second swing member 602. Therefore, the support member 601 can rotate relative to the fixed base 102 and also relative to the second swing member 602. It can be understood that the support member 601 can support the second swing member 602, and also can limit the movement of the second swing member 602 to a certain extent.

[0071] Furthermore, the second swing component 602 is also connected to the back assembly 300, therefore the movable base 101, the support component 601, and the back assembly 300 are all connected to the second swing component 602. When the movable base 101 is angularly adjusted relative to the fixed base 102, the movable base 101 drives the second swing component 602 to swing. During the swinging process, the second swing component 602 drives the back assembly 300 to adjust its angle.

[0072] In some examples, the seating device has a sitting position, a TV position, and a reclining position.

[0073] When the seat is in a sitting position or a TV position, the leg assembly 200 extends and retracts, causing the first swing component 401 to swing relative to the movable base 101. The first swing component 401 can drive the support mechanism 500 to rotate relative to the fixed base 102, thereby moving the movable base 101. During this process, the angle between the movable base 101 and the fixed base 102 remains unchanged, and the second swing component 602 is stationary relative to the movable base 101.

[0074] Furthermore, when the seat is positioned between the TV position and the reclining position, as the angle between the movable base 101 and the fixed base 102 is adjusted, the second swing component 602 swings relative to the movable base 101, thereby causing the backrest assembly 300 to adjust its angle. During this process, the leg assembly 200 remains extended, and the first swing component 401 remains relatively stationary with respect to the movable base 101.

[0075] In some examples, such as Figure 5 and Figure 6As shown, the support mechanism 500 includes a first support rod 501 and a second support rod 502. One end of the first support rod 501 is hinged to the fixed base 102, and the other end of the first support rod 501 is hinged to one end of the second support rod 502. The other end of the second support rod 502 is hinged to the movable base 101. Therefore, the first support rod 501 and the second support rod 502 form a linkage mechanism between the fixed base 102 and the movable base 101. When the movable base 101 and the fixed base 102 move relative to each other, the support mechanism 500 rotates.

[0076] Furthermore, the movable base 101 is provided with a first limiting component 503, which provides a one-way restriction to the second support rod 502. Specifically, the first limiting component 503 is formed as a limiting post, and its position corresponds to the position of the second support rod 502. When the seat device switches between a sitting position and a TV position, the second support rod 502 always contacts the first limiting component 503, thereby providing support to the first limiting component 503. Therefore, the support mechanism 500 can support the movable base 101.

[0077] Simultaneously, when the second support rod 502 contacts the first limiting component 503, the first limiting component 503 can limit the second support rod 502, preventing it from rotating. Therefore, when the seat device switches between a sitting position and a TV position, the second support rod 502 remains relatively stationary with respect to the movable base 101 under the limiting effect of the first limiting component 503, while the first support rod 501 can rotate. However, when the seat device switches between a TV position and a reclining position, the tilt angle between the movable base 101 and the fixed base 102 increases, and the second support rod 502 will rotate away from the first limiting component 503. The first support rod 501 also rotates correspondingly relative to the fixed base 102. At this time, the first limiting component 503 no longer restricts the rotation of the second support rod 502.

[0078] Specifically, such as Figure 1 As shown, since the first limiting component 503 needs to cooperate with the second support rod 502 for limiting, and the second support rod 502 and the first support rod 501 are located on the inner side of the movable base 101, the first limiting component 503 also needs to be located on the inner side of the movable base 101.

[0079] In some examples, such as Figure 5 and Figure 6 As shown, the swing mechanism 400 also includes a first connecting rod 402 and a second connecting rod 403. One end of the first connecting rod 402 is hinged to the first swing component 401, and the other end is hinged to the first support rod 501. It can be understood that the first swing component 401 is connected to the first support rod 501 through the first connecting rod 402.

[0080] Meanwhile, one end of the second link 403 is hinged to the first swing component 401, and the other end is hinged to the leg assembly 200. It can be understood that the first swing component 401 is connected to the leg assembly 200 through the second link 403.

[0081] Specifically, the first link 402, the second link 403, and the first swing component 401 are a linkage mechanism disposed between the first support rod 501 and the leg assembly 200. Under the combined action of the first link 402, the second link 403, and the first swing component 401, the leg assembly 200, the first support rod 501, and the first swing component 401 form a linkage, which facilitates the coordinated movement of the leg assembly 200, the first support rod 501, and the first swing component 401 to realize the action of the seat device.

[0082] In some examples, such as Figure 5 and Figure 12 As shown, the first swinging component 401 includes a first extension 4011 and a second extension 4012, which are connected at an angle.

[0083] The first extension 4011 extends towards the top of the movable base 101, while the second extension 4012 extends towards the bottom of the movable base 101. Specifically, the bottom of the movable base 101 refers to the space between the movable base 101 and the fixed base 102. The first connecting rod 402 is hinged to the end of the first extension 4011, and the second connecting rod 403 is hinged to the end of the second extension 4012. The connection point between the first extension 4011 and the second extension 4012 is hinged to the movable base 101.

[0084] Understandably, if the extension directions of the first extension 4011 and the second extension 4012 are on the same straight line, during the swinging process of the first swinging component 401, the first extension 4011 may protrude significantly from the top of the movable base 101, making it easy for the first extension 4011 to interfere with the seat frame and cushion at the top of the movable base 101. Simultaneously, the first connecting rod 402 needs to have a considerable length to ensure the connection between the first extension 4011 and the first connecting rod 402.

[0085] Therefore, the angled connection between the first extension 4011 and the second extension 4012 helps to conceal the first extension 4011 and the first connecting rod 402 at the bottom of the movable base 101, preventing the first extension 4011 and the first connecting rod 402 from protruding excessively from the top of the movable base 101. Simultaneously, the angled connection between the first extension 4011 and the second extension 4012 also helps to reduce the length of the first connecting rod 402.

[0086] In some examples, such as Figure 6 As shown, the second swing component 602 is provided with a second limiting component 603, which provides a one-way restriction for the second swing component 602. Specifically, the second limiting component 603 is formed as a limiting post, and its position corresponds to the position of the movable base 101. When the seat device switches between a sitting position and a TV position, the second limiting component 603 always contacts the movable base 101, thereby supporting the movable base 101 and preventing relative movement between the movable base 101 and the second swing component 602. Therefore, the movable base 101 and the second swing component 602 remain relatively stationary during this process.

[0087] However, when the seat device changes from the TV position to the reclining position, the tilt angle between the movable base 101 and the fixed base 102 increases, and the movable base 101 will rotate away from the second limiting member 603. At this time, the second limiting member 603 no longer restricts the relative rotation between the movable base 101 and the second swing member 602.

[0088] In some examples, such as Figure 5 and Figure 11 As shown, the seat assembly also includes a linkage component 604, specifically, the linkage component 604 is formed as a rod-shaped structure. One end of the linkage component 604 is hinged to the second support rod 502, and the other end is hinged to the second swing component 602.

[0089] When the seat device switches between a sitting position and a TV position, the second support rod 502 and the movable base 101 are relatively stationary, and the second swing component 602 and the movable base 101 are relatively stationary. Therefore, the linkage component 604 also remains relatively stationary with respect to the movable base 101.

[0090] Furthermore, when the seat switches between the TV position and the reclining position, the second support rod 502 rotates relative to the movable base 101, and the second swing component 602 also rotates relative to the movable base 101. During this rotation, the second support rod 502 drives the linkage component 604 to move, thereby adjusting the movement of the second swing component 602. It can be understood that the linkage component 604 links the movements of the second support rod 502 and the second swing component 602, facilitating coordinated movement of all parts of the seat to achieve the desired seat operation.

[0091] It is worth noting that the linkage component 604 is hinged to the middle of the second support rod 502. Therefore, the first support rod 501, the movable base 101, and the linkage component 604 are all hinged to the first support rod 501. When the three hinge points on the first support rod 501 can be connected in a straight line, the first support rod 501 can be configured as a straight rod; when the three hinge points on the first support rod 501 cannot be connected in a straight line, the first support rod 501 can be configured as a bent rod. It is understandable that when the first support rod 501 is configured as a bent rod, it helps to improve the structural strength of the first support rod 501.

[0092] In some examples, such as Figure 5 and Figure 11 As shown, the linkage component 604 includes a third extension 6041 and a fourth extension 6042, which are connected at an angle, making the linkage component 604 a bent rod structure. Specifically, the third extension 6041 is hinged to the second support rod 502, while the fourth extension 6042 is hinged to the second swing component 602.

[0093] The third extension 6041 and the fourth extension 6042 connect at the lowest point of the bent rod structure. It can be understood that in the linkage component 604, the connection point of the third extension 6041 and the fourth extension 6042 is close to the fixed base 102, and space is reserved at the top of the connection point. The hinge points of the first swing component 401 and the movable base 101, and the hinge points of the first swing component 401 and the first support rod 501 are all within the aforementioned spatial range. Therefore, the angled connection of the third extension 6041 and the fourth extension 6042 provides connection space for other components, ensuring the linkage of all parts of the seat assembly.

[0094] In some examples, such as Figure 5 As shown, the second support rod 502 is provided with a sixth limiting component 605, which provides a one-way restriction to the linkage component 604. Specifically, the sixth limiting component 605 is formed as a limiting post, and its position corresponds to the position of the linkage component 604. When the seat device switches between a sitting position and a TV position, the sixth limiting component 605 remains in contact with the linkage component 604, thereby enabling the linkage component 604 to support the second support rod 502 and the movable base 101, preventing the movable base 101 and the second support rod 502 from sinking, and ensuring the user's comfort when sitting on top of the movable base 101. Therefore, the movable base 101 and the linkage component 604 remain relatively stationary during this process.

[0095] In some examples, when the sixth limiting component 605 contacts the linkage component 604, it ensures that the linkage component 604 is stable relative to the movable base 101, thereby ensuring that the second swing component 602 is stable relative to the movable base 101 and preventing the second swing component 602 from rotating relative to the movable base 101. It is understood that when the seat is in the TV position and the sitting position, the limiting functions of the first limiting component 503, the sixth limiting component 605, and the second limiting component 603 cooperate to jointly limit the relative positions of the second swing component 602, the linkage component 604, and the second support rod 502.

[0096] However, when the seat switches between the TV position and the reclining position, the tilt angle between the movable base 101 and the fixed base 102 increases, thereby driving the second support rod 502 to rotate relative to the movable base 101, causing the linkage component 604 and the second support rod 502 to rotate relative to each other. It is understood that the linkage component 604 will rotate away from the sixth limiting component 605, at which point the sixth limiting component 605 no longer restricts the relative rotation between the linkage component 604 and the second support rod 502.

[0097] In some examples, such as Figure 1 As shown, the first swing component is provided with a seventh limiting component 404, which protrudes from the surface of the first swing component 401 and is used to limit the movement of the linkage component 604. Specifically, when the seventh limiting component 404 contacts the linkage component 604, the seventh limiting component 404 can unidirectionally limit the movement of the linkage component 604. Since the linkage component 604 is hinged to the second swing component 602, when the movement of the linkage component 604 is restricted, the rotation of the second swing component 602 relative to the movable base 101 is also restricted, thereby preventing the second swing component 602 from rotating when the seat device is in a sitting position or a TV position.

[0098] Simultaneously, when the linkage component 604 contacts the seventh limiting component 404, the linkage component 604 can prevent the second swing component 602 from rotating. When the user violently impacts the sofa back, the second swing component 602 is obstructed by the seventh limiting component 404, preventing the sofa back from rebounding.

[0099] In addition, in the prior art, the first limiting component 503 is set on the second support rod 502, which may result in the absence of a suitable position on the second support rod 502 to set the sixth limiting component 605. Therefore, in this application, the first limiting component 503 is set on the movable base 101.

[0100] In some examples, during the transition from a sitting position to a TV position and then from a TV position to a reclining position, the movable base 101 continuously moves forward, causing the overall center of gravity of the seat to shift forward, which can easily lead to the seat tipping over. Therefore, as... Figure 7 As shown, the seat device of this application also includes a foot support assembly 700. When the center of gravity of the double seat device moves forward, the foot support assembly 700 gradually extends and supports the ground, thereby ensuring the overall stability of the seat device.

[0101] The foot assembly 700 connects the first support rod 501 and the fixed base 102. When the first support rod 501 rotates relative to the fixed base 102, the foot assembly 700 extends or retracts.

[0102] It is understandable that the first support rod 501 rotates relative to the fixed base 102 throughout the entire posture transformation process of the seat device. Therefore, the leg assembly 700 is always in motion during the posture transformation process of the seat device.

[0103] In some examples, such as Figure 7 As shown, the support leg assembly 700 includes a first support leg link 701 and a second support leg link 702. One end of the first support leg link 701 is hinged to the first support rod 501, and the other end is provided with a roller 703. The roller 703 can rotate freely, which facilitates the support leg assembly 700 to form rolling contact with the ground and avoids the support leg assembly 700 from damaging the ground.

[0104] Meanwhile, one end of the second support rod 702 is hinged to the first support rod 701, and the other end is hinged to the fixed base 102, so that the first support rod 701, the second support rod 702, the first support rod 501, and the fixed base 102 form a four-bar linkage. According to the motion principle of the four-bar linkage, when the first support rod 501 rotates, the first support rod 701 and the second support rod 702 both rotate accordingly, thereby driving the support assembly 700 to extend and retract.

[0105] In some examples, such as Figure 5 and Figure 8 As shown, the first support leg 701 is provided with an eighth limiting component 704 and a ninth limiting component 705. The eighth limiting component 704 and the ninth limiting component 705 limit the rotation of the second support leg 702 from both sides. Since the first support leg 701 and the second support leg 702 rotate simultaneously, when the rotation of the second support leg 702 is restricted, the rotation of the first support leg 701 is also restricted, so that the eighth limiting component 704 and the ninth limiting component 705 can restrict the extension and retraction process of the support leg assembly 700.

[0106] Specifically, when the second leg link 702 contacts the eighth limiting component 704, the leg assembly 700 retracts to its limit position towards the first support rod 501; when the second leg link 702 contacts the ninth limiting component 705, the leg assembly 700 extends to its limit position away from the first support rod 501. Specifically, when the seat is in a sitting position, the second leg link 702 contacts the eighth limiting component 704; when the seat is in a TV position or a reclining position, the second leg link contacts the ninth limiting component 705.

[0107] In some examples, such as Figure 5 As shown, the leg assembly 200 includes a first leg link 201, a second leg link 202, and a leg telescopic mechanism 203. One end of the first leg link 201 is hinged to the movable base 101, and the other end is hinged to the leg telescopic mechanism 203. One end of the second leg link 202 is hinged to the movable base 101, and the other end is hinged to the leg telescopic mechanism 203. During rotation, the first leg link 201 and the second leg link 202 jointly drive the leg telescopic mechanism 203 to extend or retract.

[0108] Compared to the second leg link 202, the first leg link 201 is closer to the front of the movable base 101. To avoid structural interference between the seat frame and cushion on top of the movable base 101 and the first leg link 201, the first leg link 201 forms an L-shaped bend at the connection point with the movable base 101, thus avoiding the installation position of the seat frame and cushion. It is understandable that forming a bent rod structure for the first leg link 201 also helps to ensure its structural strength.

[0109] In some examples, the back assembly 300 includes a back connecting member 301 and a first back link 302, one end of which is hinged to the back connecting member 301, and the other end is hinged to a second swing member 602. Therefore, the back connecting member 301 is connected to the second swing member 602 via the first back link 302. It is understood that the first back link 302 can support the back connecting member 301, and when the first back link 302 and the back connecting member 301 rotate relative to each other, the angle between the back connecting member 301 and the movable base 101 can be adjusted.

[0110] The backrest connecting component 301 includes a first connecting portion 3011 and a second connecting portion 3012, which are joined at an angle, with the first connecting portion 3011 connected to the middle of the second connecting portion 3012. Furthermore, the height of the first connecting portion 3011 is greater than the height of the second connecting portion 3012, and the first connecting portion 3011 is used to connect to the backrest. Additionally, a first backrest link 302 is hinged to the second connecting portion 3012.

[0111] In some examples, such as Figure 10 As shown, the back assembly 300 also includes a second back link 303 and a third back link 304. The second back link 303 is hinged to the movable base 101, and the third back link 304 is hinged to the second swing member 602. Specifically, the middle part of the second back link 303 is hinged to the movable base 101, one end of the second back link 303 is hinged to the second connecting part 3012 of the back connecting member 301, and the other end is hinged to one end of the third back link 304. The other end of the third back link 304 is hinged to the second swing member 602. Therefore, the second back link 303 and the third back link 304 form a linkage mechanism disposed between the back connecting member 301 and the second swing member 602.

[0112] When the seat device switches between a sitting position and a TV position, the first backrest link 302 and the second backrest link 303 do not rotate relative to the movable base 101; when the seat device switches between a TV position and a reclining position, the first backrest link 302 and the second backrest link 303 rotate relative to the movable base 101.

[0113] When the seat switches between a sitting position and a TV position, the second swing component 602 and the movable base 101 remain relatively stationary. Consequently, the first backrest link 302 and the second backrest link 303 also remain relatively stationary with respect to the movable base 101, ensuring that the angle between the backrest link 301 and the movable base 101 remains constant. Since the first backrest link 302 and the second backrest link 303 do not rotate, the backrest link 301 does not move towards the rear of the seat, thus achieving the "zero-wall-leaning" function of the seat. When the seat switches between a TV position and a reclining position, the second swing component 602 swings relative to the movable base 101. During this swinging motion, the second swing component 602 drives the second backrest link 303 to rotate relative to the movable base 101 via the third backrest link 304, thereby causing the second backrest link 303 to adjust the angle of the backrest link 301. It is worth noting that when the seat device switches between the TV position and the reclining position, under the action of the first backrest link 302, the second backrest link 303 and the third backrest link 304, the backrest connecting component 301 can move towards the front of the seat device during the angle adjustment process and gradually approach the movable base 101 until the backrest connecting component 301 and the seat cushion of the movable base 101 achieve "zero gap", preventing items such as mobile phones carried by the user from falling along the gap between the backrest connecting component 301 and the movable base 101.

[0114] Furthermore, under the limiting effect of the second backrest link 303 and the third backrest link 304, when the seat is in a sitting or TV position, the backrest assembly 300 only moves forward of the seat along with the movable base 101. Simultaneously, when the seat switches from the TV position to a reclining position, the backrest assembly 300, having already moved a certain distance forward, tilts backward, preventing interference with walls or other objects in the external environment during this tilting process, thus ensuring a "zero-wall" effect for the seat.

[0115] It is understood that the back connecting component 301, the movable base 101, and the third back connecting rod 304 are all hinged to the second back connecting rod 303, meaning the second back connecting rod 303 has three hinge positions. When these three hinge positions can be connected in a straight line, the second back connecting rod 303 can be configured as a straight rod structure; when these three hinge positions cannot be connected in a straight line, the second back connecting rod 303 can be configured as a bent rod structure. Simultaneously, both the second back connecting rod 303 and the second swing component 602 are hinged to the third back connecting rod 304, meaning the third back connecting rod 304 has two hinge positions. Therefore, the third back connecting rod 304 can be configured as either a straight rod structure or a bent rod structure. Specifically, designers can configure the second back connecting rod 303 and the third back connecting rod 304 as straight rod structures or bent rod structures according to the actual situation. However, when the second back connecting rod 303 and the third back connecting rod 304 are configured as bent rod structures, the structural strength of the second back connecting rod 303 and the third back connecting rod 304 can be improved to a certain extent.

[0116] In some examples, the second connecting portion 3012 is provided with a third limiting member 305, which provides a one-way restriction to the back connecting member 301. Specifically, the third limiting member 305 is formed as a limiting post, and its position corresponds to the position of the first back connecting rod 302. When the seat device switches between a sitting position and a TV position, the third limiting member 305 remains in contact with the first back connecting rod 302, thereby allowing the first back connecting rod 302 to support the back connecting member 301 and preventing relative movement between them. Therefore, the first back connecting rod 302 and the back connecting member 301 remain relatively stationary during this process.

[0117] However, when the seat device switches between the TV posture state and the reclining posture state, the tilt angle between the movable base 101 and the fixed base 102 increases, thereby driving the second back link 303 to rotate, which in turn drives the back connecting component 301 and the first back link 302 to rotate relative to each other. It can be understood that the first back link 302 rotates away from the third limiting component 305. At this time, the third limiting component 305 no longer restricts the relative rotation between the first back link 302 and the back connecting component 301.

[0118] Furthermore, such as Figure 2 , Figure 3 and Figure 10 As shown, when the third limiting component 305 contacts the first back connecting rod 302, the angle α between the first connecting part 3011 and the movable base 101 is at its minimum value, which satisfies the requirements of the seat device for the sitting posture and TV posture.

[0119] In some examples, the second backrest link 303 is provided with a fourth limiting member 306, which provides a one-way restriction to the backrest connecting member 301. Specifically, the fourth limiting member 306 is formed as a limiting post, and its position corresponds to the position of the backrest connecting member 301. When the seat device switches between a sitting position and a TV position, the fourth limiting member 306 disengages from the backrest connecting member 301. At this time, the fourth limiting member 306 does not provide a limiting support for the backrest connecting member 301, which is supported by the first backrest link 302, thereby keeping the angle α between the first connecting part 3011 and the movable base 101 at a minimum value.

[0120] However, when the seat device changes from the TV position to the reclining position, the fourth limiting component 306 contacts the back connecting component 301, thereby supporting the back connecting component 301 and preventing relative movement between the back connecting component 301 and the second back connecting rod 303. At this time, the angle α between the first connecting part 3011 and the movable base 101 is at its maximum value, which meets the requirements of the seat device for the reclining position.

[0121] In some examples, such as Figure 5 As shown, the seating device also includes a drive assembly 800, which is used to drive the seating device to perform posture changes. Specifically, the drive assembly 800 includes a slide rail 801 and a slider 802, which is slidably connected to the slide rail 801.

[0122] In some examples, such as Figure 5 and Figure 6 As shown, the slide rail 801 is fixedly mounted on the fixed base 102, and the movable base 101 is provided with a first crossbeam 803, which is rotatably connected to the movable base 101.

[0123] Furthermore, the first crossbeam 803 is provided with a transmission assembly. On the one hand, the transmission assembly ensures the connection between the first crossbeam 803 and the leg assembly 200; on the other hand, the transmission assembly also ensures the connection between the first crossbeam 803 and the slider 802.

[0124] The sliding stroke of slider 802 on slide rail 801 has a first interval and a second interval, where the first interval is... Figure 5 In interval A, the second interval here is... Figure 5 In section B of the first section, when slider 802 slides, slider 802 drives first crossbeam 803 to rotate through transmission component. During the rotation, first crossbeam 803 drives leg component 200 to extend and retract through transmission component. Meanwhile, the angle α between the first connecting part 3011 of back connecting component 301 in back component 300 and movable base 101 is maintained at minimum value. At this time, the seat device switches between sitting posture and TV posture.

[0125] When the slider 802 slides in the second section, since the leg assembly 200 is fully extended, the first crossbeam 803 no longer rotates relative to the movable base 101. The slider 802 drives the movable base 101 to adjust its angle through the transmission assembly, thereby driving the second swinging component 602 to swing relative to the movable base 101. The angle α between the first connecting part 3011 of the back connecting component 301 in the back assembly 300 and the movable base 101 changes. At this time, the seat device switches between the TV posture state and the reclining posture state.

[0126] In some examples, the first crossbeam 803 is connected to the movable base 101 between the third back link 304 and the second swing component 602. Since the back assembly 300 has a second back link 303 and a third back link 304 that are hinged to each other on the side near the first crossbeam 803, the second back link 303 can be prevented from getting too close to the first crossbeam 803, thereby preventing interference between the first crossbeam 803 and the second back link 303.

[0127] In some examples, such as Figure 5 and Figure 6 As shown, the transmission assembly includes a first transmission rod 804, a second transmission rod 805, and a third transmission rod 806. One end of the first transmission rod 804 is hinged to the slider 802, and the other end is connected to the first crossbeam 803. Meanwhile, one end of the second transmission rod 805 is fixedly connected to the first crossbeam 803, and the other end is hinged to one end of the third transmission rod 806, while the other end of the third transmission rod 806 is hinged to the leg assembly 200. It can be understood that the second transmission rod 805 and the third transmission rod 806 form a linkage mechanism between the first crossbeam 803 and the leg assembly 200.

[0128] This application provides a seating device including a seat cushion, a leg rest, a backrest, and the aforementioned seating assembly. It is understood that the seat cushion is mounted on the top of the movable base 101, the leg rest is mounted on the leg assembly 200, and the backrest is mounted on the first connecting portion 3011 of the backrest connecting member 301.

[0129] The seating device has sitting, TV-like, and reclining positions, such as... Figure 1 , Figure 12 and Figure 13 As shown, when the seat is in a seated position, the first swing component 401 is at its extreme position in the first rotation direction, and the second swing component 602 is at its extreme position in the third rotation direction. This causes the leg assembly 200 to retract to the bottom of the movable base 101, and the angle α between the first connecting portion 3011 of the backrest assembly 300 and the movable base 101 to be at its minimum, thus satisfying the user's needs for a normal seated posture. The first rotation direction is... Figure 12 In the V direction, the third rotation direction is... Figure 13 The X direction in the equation.

[0130] When the seat is in the TV position, the first swing component 401 is at its extreme position in the second rotation direction, and the second swing component 602 is at its extreme position in the third rotation direction. This allows the leg assembly 200 to extend beyond the movable base 101, while the angle α between the first connecting portion 3011 of the backrest assembly 300 and the movable base 101 remains at its minimum, satisfying the user's TV position requirements. The second rotation direction is... Figure 12 The U direction in the middle.

[0131] When the seat is in a reclining position, the first swing component 401 is at its extreme position in the second rotation direction, and the second swing component 602 is at its extreme position in the fourth rotation direction. This keeps the leg assembly 200 extended, and the angle α between the first connecting portion 3011 of the backrest assembly 300 and the movable base 101 is at its maximum value, satisfying the user's need for a reclining posture. The fourth rotation direction is... Figure 13 The W direction in the middle.

[0132] Furthermore, when the seat is in a reclining position, the angle between the movable base 101 and the fixed base 102 increases, allowing the user to be in a natural posture in a weightless state, thus achieving "zero gravity" for the seating. Simultaneously, when the seat transitions from a sitting position to a TV-like or reclining position, the movable base 101 and the backrest assembly 300 always move towards the front of the seat. When the seat is positioned, there is no need to reserve space for posture transitions at the rear, thus achieving "zero wall contact" for the seating.

[0133] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application. Furthermore, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

Claims

1. A seating device, characterized in that, include: The base assembly includes a movable base (101) with adjustable relative position and a fixed base (102); A leg assembly (200) is hinged to the movable base (101), and the leg assembly (200) extends or retracts by rotation relative to the movable base (101); The back assembly (300) includes a back connecting member (301), a first back link (302), a second back link (303) and a third back link (304) hinged to the movable base (101), and the back assembly (300) is angle-adjustable by rotation relative to the movable base (101). The first motion assembly includes a swing mechanism (400) and a support mechanism (500) hinged to the fixed base (102). The swing mechanism (400) includes a first swing component (401) hinged to the movable base (101). The support mechanism (500) and the leg assembly (200) are respectively connected to the swing mechanism (400). When the first swing component (401) rotates relative to the movable base (101), the leg assembly (200) extends or retracts. The support mechanism (500) includes a first support rod (501) and a second support rod (502) hinged to each other. The first support rod (501) is hinged to the fixed base (102), and the second support rod (502) is hinged to the movable base (101). The second motion component includes a support member (601) hinged to the fixed base (102) and a second swing member (602) hinged to the movable base (101). The third back link (304) is hinged to the second swing member (602). The support member (601) and the back assembly (300) are respectively hinged to the second swing member (602). When the second swing member (602) rotates relative to the movable base (101), the back assembly (300) adjusts its angle.

2. The seating device according to claim 1, characterized in that, The movable base (101) is provided with a first limiting component (503), which is used to limit the rotation of the second support rod (502) relative to the movable base (101). When the second support rod (502) contacts the first limiting component (503), the support mechanism (500) supports the movable base (101).

3. The seating device according to claim 1, characterized in that, The backrest connecting component (301) includes a second connecting part (3012) and a first connecting part (3011) for connecting the backrest. The first connecting part (3011) and the second connecting part (3012) are connected at an angle. One end of the first backrest link (302) is hinged to the second connecting part (3012) and the other end is hinged to the second swing component (602). One end of the second backrest link (303) is hinged to the second connecting part (3012) and the other end is hinged to the third backrest link (304).

4. The seating device according to claim 3, characterized in that, The back connecting component (301) is provided with a third limiting component (305), which is used to limit the rotation of the back connecting component (301) relative to the first back connecting rod (302). When the third limiting component (305) contacts the first back connecting rod (302), the angle between the first connecting part (3011) and the movable base (101) is at its minimum value.

5. The seating device according to claim 3, characterized in that, The second back link (303) is provided with a fourth limiting component (306), which is used to limit the rotation of the back connecting component (301) relative to the second back link (303). When the fourth limiting component (306) contacts the second connecting part (3012), the angle between the first connecting part (3011) and the movable base (101) is at its maximum value.

6. The seating device according to claim 1, characterized in that, The seat device further includes a linkage component (604), one end of which is hinged to the second support rod (502) and the other end is hinged to the second swing component (602). The second support rod (502) is provided with a sixth limiting component (605), which is used to limit the rotation of the linkage component (604) relative to the second support rod (502). When the linkage component (604) contacts the sixth limiting component (605), the linkage component (604) supports the second support rod (502).

7. The seating device according to claim 6, characterized in that, The first swing component (401) is provided with a seventh limiting component (404). When the linkage component (604) contacts the seventh limiting component (404), the seventh limiting component (404) is used to limit the movement of the linkage component (604) so ​​as to restrict the rotation of the second swing component (602) through the linkage component (604).

8. The seating device according to claim 1, characterized in that, The seat assembly further includes a drive assembly (800) for driving the seat assembly to change posture. The drive assembly (800) includes a slide rail (801) and a slider (802). The slide rail (801) is fixedly mounted on the fixed base (102). The movable base (101) is provided with a rotatable first crossbeam (803). The first crossbeam (803) is provided with a transmission assembly. The slider (802) is connected to the first crossbeam (803) through the transmission assembly. The first crossbeam (803) is connected to the leg assembly (200) through the transmission assembly.

9. The seating device according to claim 8, characterized in that, When the slider (802) slides in the first section of the slide rail (801), the slider (802) drives the first crossbeam (803) to rotate, so as to drive the leg assembly (200) to extend and retract through the transmission assembly; when the slider (802) slides in the second section of the slide rail (801), the slider (802) drives the movable base (101) to adjust its angle, so as to drive the second swing component (602) to swing.

10. The seating device according to claim 8, characterized in that, The transmission assembly includes a first transmission rod (804), a second transmission rod (805), and a third transmission rod (806). One end of the first transmission rod (804) is hinged to the slider (802), and the other end is connected to the first crossbeam (803). One end of the second transmission rod (805) is fixedly connected to the first crossbeam (803), and the other end is hinged to the third transmission rod (806). The third transmission rod (806) is hinged to the leg assembly (200).

11. The seating device according to claim 1, characterized in that, The seat assembly further includes a leg assembly (700) for supporting the seat assembly. The leg assembly (700) connects the first support rod (501) and the fixed base (102). When the first support rod (501) rotates relative to the fixed base (102), the leg assembly (700) extends or retracts.

12. The seating device according to claim 11, characterized in that, The support leg assembly (700) includes a first support leg link (701) and a second support leg link (702). One end of the first support leg link (701) is hinged to the first support rod (501), and the other end is provided with a roller (703). One end of the second support leg link (702) is hinged to the first support leg link (701), and the other end is hinged to the fixed base (102).

13. The seating device according to claim 12, characterized in that, The first support leg link (701) is provided with an eighth limiting component (704) and a ninth limiting component (705), the eighth limiting component (704) and the ninth limiting component (705) are used to limit the rotation of the second support leg link (702) relative to the first support leg link (701); when the second support leg link (702) contacts the eighth limiting component (704), the support leg assembly (700) retracts to its limit position in the direction closer to the first support rod (501); when the second support leg link (702) contacts the ninth limiting component (705), the support leg assembly (700) extends to its limit position in the direction away from the first support rod (501).

14. The seating device according to claim 1, characterized in that, When the seat device switches between a sitting position and a TV position, the first backrest link (302) and the second backrest link (303) remain relatively stationary with respect to the movable base (101); when the seat device switches between a TV position and a reclining position, the first backrest link (302) and the second backrest link (303) rotate relative to the movable base (101).

15. A seating arrangement, characterized in that, include: The seating device according to any one of claims 1 to 14, the seating device having a sitting posture, a TV posture, and a reclining posture; When the seat device is in a sitting position, the first swing component (401) is located at the extreme position in the first rotation direction, and the second swing component (602) is located at the extreme position in the third rotation direction. When the seat device is in the TV posture state, the first swing component (401) is located at the extreme position in the second rotation direction, and the second swing component (602) is located at the extreme position in the third rotation direction. When the seat is in a reclining position, the first swing component (401) is at the extreme position in the second rotation direction, and the second swing component (602) is at the extreme position in the fourth rotation direction. Wherein, the second rotation direction is the opposite direction of the first rotation direction, and the fourth rotation direction is the opposite direction of the third rotation direction.

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