Seat device and seat

Abstract

The invention 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 posture state, a TV posture state and a lying posture state, and when the seat device is switched between the sitting posture state and the TV posture state, the first movement assembly and the second movement assembly move in the sitting posture state. The first swing component rotates relative to the movable base and drives the leg component to stretch or retract, and the second swing component and the movable base are relatively static, so that the angle between the movable base and the back component is kept unchanged; when the seat device is switched between the TV posture state and the lying posture state, the first swing part and the movable base are relatively static, it is guaranteed that the leg assembly stretches, and the second swing part rotates relative to the movable base and drives the movable base and the back assembly to conduct angle adjustment. The seat device can be adjusted to be in three states, and the requirements of a user for diversified rest postures are fully met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of furniture, in particular to a seat device and a seat. BACKGROUND

[0002] The TV posture of a seat is a posture mode designed for relaxation, which is in line with ergonomics. In this posture, the seat cushion maintains an angle similar to that in the regular sitting posture, and the leg rest is significantly raised to form a comfortable angle between the thigh and the lower leg. This can effectively relieve fatigue caused by long sitting and avoid the pressure on the knees caused by the traditional sitting posture, and is more conducive to maintaining the stability of the spine than completely lying down.

[0003] Current seats with posture adjustment function mostly only support switching between sitting and lying postures. When the seat is switched from a sitting posture to a lying posture, the leg rest is raised, the angle of the seat cushion changes, and the angle of the backrest changes simultaneously, and the height of the leg rest cannot be adjusted relatively independently. This design limitation makes it difficult for existing seats to achieve the TV posture state of stretching the legs, and cannot fully meet the needs of users for diversified resting postures. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a seat device that can realize sitting, TV and lying postures.

[0005] The present application also proposes a seat with the above-mentioned seat 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 the present application, the back assembly comprises a back connecting member, a first back connecting rod, a second back connecting rod hinged to the movable base, and a third back connecting rod hinged to the second swing member, the back connecting member comprises a second connecting portion and a first connecting portion for connecting a backrest, the first connecting portion and the second connecting portion are angularly connected, one end of the first back connecting rod is hinged to the second connecting portion, and the other end is hinged to the second swing member, one end of the second back connecting rod is hinged to the second connecting portion, and the other end is hinged to the third back connecting rod.

[0010] According to some embodiments of the present application, the back connecting member is provided with a third limiting member for limiting the rotation of the back connecting member relative to the first back connecting rod, and when the third limiting member contacts the first back connecting rod, the included angle between the first connecting portion and the movable base is the minimum value.

[0011] According to some embodiments of the present application, the second back connecting rod is provided with a fourth limiting member for limiting the rotation of the back connecting member relative to the second back connecting rod, and when the fourth limiting member contacts the second connecting portion, the included angle between the first connecting portion and the movable base is the maximum value.

[0012] According to some embodiments of the present application, the seat device further comprises a linkage member, one end of the linkage member is hinged to the second support rod, and the other end is hinged to the second swing member, the second support rod is provided with a sixth limiting member for limiting the rotation of the linkage member relative to the second support rod, and when the third extension portion contacts the sixth limiting member, the linkage member supports the second support rod.

[0013] According to some embodiments of the present application, the first swing member is provided with a seventh limiting member for limiting the movement of the linkage member to limit the rotation of the second swing member through the linkage member when the linkage member contacts the seventh limiting member.

[0014] According to some embodiments of the present application, the seat device further comprises a driving assembly for driving the seat device to change posture, the driving assembly comprises a slide rail and a slide block, the slide rail is fixedly arranged on the fixed base, the movable base is provided with a rotatable first cross beam, the first cross beam is provided with a transmission assembly, the slide block is connected to the first cross beam through the transmission assembly, and the first cross beam is connected to the leg assembly through the transmission assembly.

[0015] According to some embodiments of the present application, when the slider slides in the first section of the slide rail, the slider drives the first cross beam to rotate to drive the leg assembly to extend or 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 the angle to drive the second swing component to swing.

[0016] According to some embodiments of the present application, the transmission assembly comprises a first transmission rod, a second transmission rod and a third transmission rod, one end of the first transmission rod is hingedly connected to the slider, and the other end is connected to the first cross beam, one end of the second transmission rod is fixedly connected to the first cross beam, and the other end is hingedly connected to the third transmission rod, and the third transmission rod is hingedly connected to the leg assembly.

[0017] According to some embodiments of the present application, the seat device further comprises a leg assembly for supporting the seat device, the leg assembly connects the first support rod and the fixed base, and when the first support rod rotates relative to the fixed base, the leg assembly extends or retracts.

[0018] According to some embodiments of the present application, the leg assembly comprises a first leg link and a second leg link, one end of the first leg link is hingedly connected to the first support rod, and the other end is provided with a roller; one end of the second leg link is hingedly connected to the first leg link, and the other end is hingedly connected to the fixed base.

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

[0020] According to some embodiments of the present application, when the seat device switches between the sitting state and the TV state, the first back link and the second back link remain relatively stationary with the movable base; when the seat device switches between the TV state and the lying state, the first back link and the second back link rotate relative to the movable base.

[0021] According to the second aspect of the present application, the seat device has a sitting state, a TV state and a lying state.

[0022] when the seat device is in the TV posture, the first swing component is located at the limit position of the second rotation direction, and the second swing component is located at the limit position of the third rotation direction;

[0023] when the seat device is in the TV posture, the first swing component is located at the limit position of the second rotation direction, and the second swing component is located at the limit position of the third rotation direction;

[0024] when the seat device is in the TV posture, the first swing component is located at the limit position of the second rotation direction, and the second swing component is located at the limit position of the third 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] According to the seat device of the present application, at least the following beneficial effects are achieved: the seat device of the first aspect of the present application has a sitting posture, a TV posture and a lying posture. When the seat device is switched between the sitting posture and the TV posture, the first swing component rotates relative to the movable base and drives the leg assembly to stretch or contract, the second support rod contacts the first limiting component to support the movable base, and the second swing component is relatively static relative to the movable base, so as to ensure that the angle of the movable base and the back assembly does not change. When the seat device is switched between the TV posture and the lying posture, the first swing component is relatively static relative to the movable base, so as to ensure that the leg assembly is stretched, and the second swing component rotates relative to the movable base and drives the movable base and the back assembly to adjust the angle. Therefore, the seat device of the present application can be adjusted to three states, which fully meets the needs of users for diversified resting postures.

[0027] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0028] The present application will be further illustrated below in conjunction with the drawings and examples. It should be noted that the examples embodied in the following drawings are exemplary and are used to explain the present application, and cannot be understood as a limitation of the present application.

[0029] Figure 1 is a structural schematic view of the seat device of the present application in a sitting posture;

[0030] Figure 2 is a structural schematic view of the seat device of the present application in a sitting posture;

[0031] Figure 3is a lateral view of the seat device in the sitting position according to an embodiment of the present application;

[0032] Figure 4 is a structural view of the seat device in the TV position according to an embodiment of the present application;

[0033] Figure 5 is a lateral view of the seat device in the TV position according to an embodiment of the present application;

[0034] Figure 6 is a lateral view of the seat device in the TV position according to an embodiment of the present application;

[0035] Figure 7 is a structural view of the seat device in the lying position according to an embodiment of the present application;

[0036] Figure 8 is a lateral view of the seat device in the lying position according to an embodiment of the present application;

[0037] Figure 9 is a lateral view of the seat device in the lying position according to an embodiment of the present application;

[0038] Figure 10 is a structural view of the back assembly in the seat device according to an embodiment of the present application;

[0039] Figure 11 is a structural view of the linkage assembly in the seat device according to an embodiment of the present application;

[0040] Figure 12 is a structural view of the first swing assembly in the seat device according to an embodiment of the present application;

[0041] Figure 13 is a structural view of the second swing assembly in the seat device according to an embodiment of the present application.

[0042] Reference signs:

[0043] 101. movable base; 102. fixed base;

[0044] 200. leg assembly; 201. first leg link; 202. second leg link; 203. leg extension mechanism;

[0045] 300. back assembly; 301. back connecting assembly; 3011. first connecting part; 3012. second connecting part; 302. first back link; 303. second back link; 304. third back link; 305. third limiting part; 306. fourth limiting part; 307. first limiting edge; 308. protrusion; 309. second limiting edge; 310. fifth limiting part;

[0046] 400. swing mechanism; 401. first swing 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. foot assembly; 701. first foot connecting rod; 702. second foot connecting rod; 703. roller; 704. eighth limiting component; 705. ninth limiting component;

[0050] 800. driving assembly; 801. slide rail; 802. slide block; 803. first cross beam; 804. first transmission rod; 805. second transmission rod; 806. third transmission rod. DETAILED DESCRIPTION

[0051] The embodiments of the present application will be described below in detail with reference to the accompanying drawings. The embodiments described below are exemplary and are only used to explain the present application, and cannot be understood as a limitation to the present application.

[0052] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the present application.

[0053] In the description of the present application, if the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If it is described that the first, the second is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0054] In the description of the application, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "linkage" should be understood broadly, for example: can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the application can be understood according to the specific circumstances.

[0055] In the description of the application, if the description of the terms "one embodiment", "some embodiments", "one example", "some examples", "some embodiments", "illustrative embodiments", "example", "specific example", "some examples" appears, it means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the application. In the description, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] As shown in Figure 1 and Figure 2 , the seat device provided by the embodiments of the application comprises a base assembly, a leg assembly 200, a back assembly 300, a first movement assembly and a second movement assembly.

[0057] The base assembly comprises a movable base 101 and a fixed base 102. The position of the fixed base 102 is fixed, and the movable base 101 can move relative to the fixed base 102, so as to adjust the position and angle of the movable base 101. The leg assembly 200 is hinged to the movable base 101 and is used for mounting a leg rest. The leg assembly 200 can perform telescopic movement relative to the movable base 101, so as to adjust the position and height of the leg rest. The back assembly 300 is hinged to the movable base 101 and is used for mounting a backrest. The back assembly 300 can also move relative to the movable base 101, so as to adjust the position and angle of the backrest. The movable base 101, the leg assembly 200 and the back assembly 300 are linked together, so as to ensure the synchronism of the movements of the three.

[0058] It is worth noting that, as shown in Figure 4 , the seat device of the application is different from the seat device which only has a sitting position and a lying position. The seat device of the application can also be adjusted to a TV position on the premise of having a sitting position and a lying position.

[0059] Specifically, as shown in Figure 2 and Figure 3As shown, when the seat device is in the sitting state, the leg assembly 200 is retracted to the bottom of the movable base 101, and the angle a between the installed backrest of the back assembly 300 and the movable base 101 is at a minimum value; as shown in Figure 5 and Figure 6 As shown, when the seat device is in the TV state, the leg assembly 200 is fully extended, and the angle a between the installed backrest of the back assembly 300 and the movable base 101 is still at a minimum value; as shown in Figure 8 and Figure 9 As shown, when the seat device is in the lying state, the leg assembly 200 remains fully extended, and the angle a between the installed backrest of the back assembly 300 and the movable base 101 is adjusted to a maximum value.

[0060] Further, the seat device needs to be converted to the TV state first in the process of converting from the sitting state to the lying state, and for the same reason, the seat device also needs to be converted to the TV state first in the process of converting from the lying state to the sitting state.

[0061] In the process of posture conversion, the movable base 101 also moves relative to the fixed base 102. Specifically, in the process of converting the seat device from the sitting state to the TV state, the movable base 101 moves to the front side of the seat device, but the angle of the movable base 101 relative to the fixed base 102 does not change; in the process of converting the seat device from the TV state to the lying state, the movable base 101 moves to the front side of the seat device, and at the same time, the angle of the movable base 101 relative to the fixed base 102 gradually increases. Specifically, the front side of the seat device refers to the side of the seat device where the leg assembly is arranged.

[0062] It can be understood that the process of converting the seat device from the TV state to the sitting state is inverse to the process of converting the seat device from the sitting state to the TV state, and the process of converting the seat device from the lying state to the TV state is inverse to the process of converting the seat device from the TV state to the lying state, which will not be described here.

[0063] In addition, as shown in Figure 5 and Figure 12 The first moving assembly includes a first swing component 401, which swings relative to the movable base 101 when the leg assembly 200 performs the extension and retraction movement, that is, the first swing component 401 swings when the seat device is converted between the sitting state and the TV state. However, when the seat device is converted between the TV state and the lying state, the first swing component 401 is relatively stationary with the movable base 101 and does not swing because the leg assembly 200 does not perform the extension and retraction movement.

[0064] At the same time, as shown in Figure 5 and Figure 13As shown, the second movement assembly includes a second swing component 602, which swings relative to the movable base 101 when the back assembly 300 moves, i.e. the second swing component 602 swings when the seat device is converted between the lying position and the TV position. However, when the seat device is converted between the sitting position and the TV position, the second swing component 602 is relatively stationary with the movable base 101 and does not swing because the back assembly 300 does not move.

[0065] In some examples, as shown in Figure 5 As shown, the first movement assembly includes a swing mechanism 400 and a support mechanism 500, the swing mechanism 400 includes the first swing component 401 described above, and the first swing component 401 is hinged to the movable base 101, and the first swing component 401 swings by rotating relative to the movable base 101. When the seat device is converted between the sitting position and the 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, i.e. the support mechanism 500 can rotate relative to the fixed base 102. Further, the support mechanism 500 is used to support the movable base 101, and it can be understood that when the support mechanism 500 supporting the movable base 101 moves, the movable base 101 also moves.

[0067] At the same time, the support mechanism 500 is connected to the first swing component 401, so that the first swing component 401 drives the support mechanism 500 to rotate relative to the fixed base 102 during the swing process.

[0068] In addition, the first swing component 401 is also connected to the leg assembly 200, so that the movable base 101, the support mechanism 500 and the leg assembly 200 are all connected to the first swing component 401. When the leg assembly 200 extends or retracts, the leg assembly 200 drives the first swing component 401 to swing relative to the movable base 101. During the swing process, the first swing 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, as shown in Figure 5 and Figure 6 As shown, the second movement assembly includes a support component 601 and a second swing component 602, the second swing component 602 is hinged to the movable base 101, and the second swing component 602 swings by rotating relative to the movable base 101. When the seat device is converted between the TV position and the lying position, the second swing component 602 is used to control the movement of the back assembly 300.

[0070] The support member 601 is formed as a rod structure, one end of which is hinged to the fixed base 102 and the other end of which is hinged to the second swing member 602. Thus, the support member 601 is capable of rotating relative to the fixed base 102 and also capable of rotating relative to the second swing member 602. It can be appreciated that the support member 601 is capable of supporting the second swing member 602 and also capable of limiting the movement of the second swing member 602 to a certain extent.

[0071] In addition, the second swing member 602 is also connected to the back assembly 300, and thus the movable base 101, the support member 601 and the back assembly 300 are all connected to the second swing member 602. When the movable base 101 is adjusted in angle relative to the fixed base 102, the movable base 101 drives the second swing member 602 to swing. During the swinging, the second swing member 602 drives the back assembly 300 to adjust in angle.

[0072] In some examples, the seat arrangement has a sitting position, a TV position and a lying position.

[0073] When the seat arrangement is between the sitting position and the TV position, the leg assembly 200 is driven to perform an extension movement, thereby driving the first swing member 401 to swing relative to the movable base 101, and the first swing member 401 is capable of driving the support mechanism 500 to rotate relative to the fixed base 102, thereby driving the movable base 101 to move. During this process, the angle between the movable base 101 and the fixed base 102 remains unchanged, and the second swing member 602 remains stationary relative to the movable base 101.

[0074] Further, when the seat arrangement is between the TV position and the lying position, as the angle between the movable base 101 and the fixed base 102 is adjusted, the second swing member 602 is driven to swing relative to the movable base 101, thereby driving the back assembly 300 to adjust in angle. During this process, the leg assembly 200 remains extended, and the first swing member 401 remains stationary relative to the movable base 101.

[0075] In some examples, as Figure 5 and Figure 6As shown, the support mechanism 500 comprises 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, the other end of the first support rod 501 is hinged to one end of the second support rod 502, and 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 are a connecting rod mechanism arranged between the fixed base 102 and the movable base 101, and the support mechanism 500 rotates when the movable base 101 and the fixed base 102 move relatively.

[0076] Further, the movable base 101 is provided with a first limiting component 503, the first limiting component 503 plays a one-way limiting role on the second support rod 502. Specifically, the first limiting component 503 is formed as a limiting column, and the position of the first limiting component 503 corresponds to the position of the second support rod 502. When the seat device is converted between the sitting state and the TV state, the second support rod 502 always contacts the first limiting component 503, thereby supporting the first limiting component 503, so that the support mechanism 500 can support the movable base 101.

[0077] At the same time, when the second support rod 502 contacts the first limiting component 503, the first limiting component 503 can limit the second support rod 502 to avoid rotating. Therefore, when the seat device is converted between the sitting state and the TV state, the second support rod 502 remains relatively stationary with the movable base 101 under the limiting action of the first limiting component 503, and the first support rod 501 can rotate. However, when the seat device is converted between the TV state and the lying state, the inclination angle between the movable base 101 and the fixed base 102 increases, the second support rod 502 will rotate away from the first limiting component 503, and the first support rod 501 will also rotate relative to the fixed base 102, at this time the first limiting component 503 no longer limits the rotation of the second support rod 502.

[0078] Specifically, as shown in Figure 1 Since the first limiting component 503 needs to be limited with the second support rod 502, and the second support rod 502 and the first support rod 501 are arranged on the inner side of the movable base 101, the first limiting component 503 also needs to be arranged on the inner side of the movable base 101.

[0079] In some examples, as shown in Figure 5 and Figure 6 The swing mechanism 400 further comprises 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 connecting rod 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 with the leg assembly 200 through the second connecting rod 403.

[0081] Specifically, the first connecting rod 402, the second connecting rod 403 and the first swing component 401 are connecting rod mechanisms arranged between the first support rod 501 and the leg assembly 200. Under the combined action of the first connecting rod 402, the second connecting rod 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, as shown in Figure 5 and Figure 12 , the first swing component 401 includes a first extension 4011 and a second extension 4012, and the first extension 4011 and the second extension 4012 are angularly connected.

[0083] Among them, the first extension 4011 extends towards the top of the movable base 101, and 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, and the connection position of the first extension 4011 and the second extension 4012 is hinged to the movable base 101.

[0084] It can be understood that if the extension directions of the first extension 4011 and the second extension 4012 are on the same straight line, when the first swing component 401 swings, the first extension 4011 is likely to protrude significantly from the top of the movable base 101, which makes the first extension 4011 likely to interfere with the seat frame and the cushion on the top of the movable base 101. At the same time, the first connecting rod 402 also needs to have a larger length to ensure the connection of the first extension 4011 and the first connecting rod 402.

[0085] Therefore, the angular connection of the first extension 4011 and the second extension 4012 helps to hide the first extension 4011 and the first connecting rod 402 at the bottom of the movable base 101, avoiding the first extension 4011 and the first connecting rod 402 protruding too much from the top of the movable base 101. At the same time, the angular connection of 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, as shown in Figure 6 The second swing component 602 is provided with a second limiting component 603, which plays a role of one-way limiting for the second swing component 602. Specifically, the second limiting component 603 is formed as a limiting column, and the position of the second limiting component 603 corresponds to the position of the movable base 101. When the seat device is switched between the sitting state and the TV state, the second limiting component 603 always contacts the movable base 101, thereby forming support for the movable base 101, avoiding relative movement between the movable base 101 and the second swing component 602, so that the movable base 101 and the second swing component 602 remain relatively static during this process.

[0087] However, when the seat device is converted from the TV state to the lying state, the inclination angle of the movable base 101 and the fixed base 102 increases, and the movable base 101 will rotate away from the second limiting component 603, at which time the second limiting component 603 no longer limits the relative rotation between the movable base 101 and the second swing component 602.

[0088] In some examples, as shown in Figure 5 and Figure 11 The seat device further comprises a linkage component 604, which is specifically 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 is switched between the sitting state and the TV state, the second support rod 502 and the movable base 101 are relatively static, and the second swing component 602 and the movable base 101 are relatively static, so the linkage component 604 also remains relatively static with the movable base 101.

[0090] Further, when the seat device is switched between the TV state and the lying state, 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. The second support rod 502 drives the linkage component 604 to move during the rotation, thereby adjusting the movement of the second swing component 602 by the second support rod 502. It can be understood that the linkage component 604 causes the movement of the second support rod 502 and the second swing component 602 to be associated, facilitating the coordinated movement of various parts of the seat device to achieve the action of the seat device.

[0091] It is worth noting that the linkage component 604 is hinged to the middle of the second support rod 502, so 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 hinged positions on the first support rod 501 can be connected in a straight line, the first support rod 501 can be provided as a straight rod; when the three hinged positions on the first support rod 501 cannot be connected in a straight line, the first support rod 501 can be provided as a bent rod. It can be understood that when the first support rod 501 is provided as a bent rod, it helps to improve the structural strength of the first support rod 501.

[0092] In some examples, as shown in Figure 5 and Figure 11 The linkage component 604 includes a third extension 6041 and a fourth extension 6042, and the third extension 6041 and the fourth extension 6042 are angularly connected, so that the linkage component 604 is formed as a bent rod structure. Specifically, the third extension 6041 is hinged to the second support rod 502, and the fourth extension 6042 is hinged to the second swing component 602.

[0093] The position where the third extension 6041 and the fourth extension 6042 are connected is the position with the lowest height of the bent rod structure. It can be understood that in the linkage component 604, the connection position of the third extension 6041 and the fourth extension 6042 is close to the fixed base 102, and the top of the connection position of the third extension 6041 and the fourth extension 6042 is reserved. The hinged positions of the first swing component 401 and the movable base 101, and the hinged positions of the first swing component 401 and the first support rod 501 are all within the above-mentioned space range. Therefore, the angular connection of the third extension 6041 and the fourth extension 6042 can reserve connection space for other components, and ensure the linkage of each part of the seat device.

[0094] In some examples, as shown in Figure 5 The second support rod 502 is provided with a sixth limiting component 605, and the sixth limiting component 605 plays a one-way limiting role on the linkage component 604. Specifically, the sixth limiting component 605 is formed as a limiting column, and the position of the sixth limiting component 605 corresponds to the position of the linkage component 604. When the seat device switches between the sitting state and the TV state, the sixth limiting component 605 always contacts the linkage component 604, so that the linkage component 604 supports the second support rod 502 and the movable base 101, avoids the sinking of the movable base 101 and the second support rod 502, and ensures the comfort of the user when sitting on the top of the movable base 101, so that the movable base 101 and the linkage component 604 remain relatively static 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, when the seat device is converted from the sitting posture to the TV posture and then from the TV posture to the lying posture, the movable base 101 continuously moves to the front side of the seat device, so that the center of gravity of the seat device as a whole moves forward, which is likely to cause the seat device to fall. Therefore, as shown in Figure 7 the seat device of the present application further comprises a leg assembly 700, which gradually extends and supports the ground when the center of gravity of the double seat device moves forward, thereby ensuring the stability of the seat device as a whole.

[0101] The leg assembly 700 is connected to the first support rod 501 and the fixed base 102, and extends or retracts when the first support rod 501 rotates relative to the fixed base 102.

[0102] It can be understood that the first support rod 501 rotates relative to the fixed base 102 throughout the posture conversion process of the seat device, so that the leg assembly 700 is in motion at all times during the posture conversion process of the seat device.

[0103] In some examples, as shown in Figure 7 the leg assembly 700 comprises a first leg link 701 and a second leg link 702, one end of the first 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 rolling contact between the leg assembly 700 and the ground, and avoids damage to the ground.

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

[0105] In some examples, as shown in Figure 5 and Figure 8 the first leg link 701 is provided with an eighth limiting part 704 and a ninth limiting part 705, which limit the rotation of the second leg link 702 on both sides of the second leg link 702. Since the first leg link 701 and the second leg link 702 rotate simultaneously, when the rotation of the second leg link 702 is limited, the rotation of the first leg link 701 is also limited, so that the eighth limiting part 704 and the ninth limiting part 705 can limit the extension and retraction process of the leg assembly 700.

[0106] When the second leg link 702 contacts the eighth limiting component 704, the leg assembly 700 is retracted to the limit position in the direction close to the first support rod 501; when the second leg link 702 contacts the ninth limiting component 705, the leg assembly 700 is extended to the limit position in the direction away from the first support rod 501. Specifically, when the seat device is in the sitting position, the second leg link 702 contacts the eighth limiting component 704; when the seat device is in the TV position and the lying position, the second leg link contacts the ninth limiting component 705.

[0107] In some examples, as shown in FIG. 2A, 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 hingedly connected to the movable base 101, and the other end is hingedly connected to the leg telescopic mechanism 203. One end of the second leg link 202 is hingedly connected to the movable base 101, and the other end is hingedly connected to the leg telescopic mechanism 203. The first leg link 201 and the second leg link 202 jointly drive the leg telescopic mechanism 203 to extend or retract during rotation. Figure 5

[0108] In some examples, compared with the second leg link 202, the first leg link 201 is closer to the front side of the movable base 101. In order to avoid structural interference between the seat frame and the seat cushion on the top of the movable base 101 and the first leg link 201, the first leg link 201 is formed as an L-shaped bend at the position connected to the movable base 101, thereby avoiding the installation position of the seat frame and the seat cushion. It can be understood that forming the first leg link 201 as a bent rod structure is also conducive to ensuring the structural strength of the first leg link 201.

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

[0110] In some examples, the back connecting component 301 includes a first connecting part 3011 and a second connecting part 3012. The first connecting part 3011 and the second connecting part 3012 are angularly connected, and the first connecting part 3011 is connected to the middle position of the second connecting part 3012. Further, the height of the first connecting part 3011 is greater than the height of the second connecting part 3012, and the first connecting part 3011 is used to connect the backrest. In addition, the first back link 302 is hingedly connected to the second connecting part 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] Further, under the restriction of the second back link 303 and the third back link 304, the back assembly 300 only moves to the front side of the seat device along with the movable base 101 in the sitting state and the TV state. Meanwhile, when the seat device switches from the TV state to the lying state, the back assembly 300 which has moved to the front side of the seat device by a certain distance tilts to the rear side of the seat device, avoiding the interference between the back assembly 300 and the wall or other objects in the external environment during the process of tilting to the rear side of the seat device, and ensuring that the seat device realizes the "zero wall-hugging" effect.

[0115] It can be understood that the back connecting component 301, the movable base 101 and the third back link 304 are all hinged with the second back link 303, that is, the second back link 303 is provided with three hinge positions. When the above-mentioned three hinge positions can be connected in a straight line, the second back link 303 can be provided as a straight rod structure, and when the above-mentioned three hinge positions cannot be connected in a straight line, the second back link 303 can be provided as a bent rod structure. Meanwhile, the second back link 303 and the second swing component 602 are both hinged with the third back link 304, that is, the third back link 304 is provided with two hinge positions, so that the third back link 304 can be provided as a straight rod structure or a bent rod structure. Specifically, the designer can set the second back link 303 and the third back link 304 as a straight rod structure or a bent rod structure according to the actual situation, however, when the second back link 303 and the third back link 304 are set as a bent rod structure, the structural strength of the second back link 303 and the third back link 304 can be improved to a certain extent.

[0116] In some examples, the second connecting part 3012 is provided with a third limiting component 305, and the third limiting component 305 plays a one-way limiting role on the back connecting component 301. Specifically, the third limiting component 305 is formed as a limiting column, and the position of the third limiting component 305 corresponds to the position of the first back link 302. When the seat device switches between the sitting state and the TV state, the third limiting component 305 always contacts the first back link 302, so that the first back link 302 supports the back connecting component 301, avoiding the relative movement between the first back link 302 and the back connecting component 301, and thus the first back link 302 and the back connecting component 301 remain relatively stationary in this process.

[0117] However, when the seat device switches between the TV posture state and the lying posture state, the inclination angle of the movable base 101 and the fixed base 102 increases, thereby driving the second back connecting rod 303 to rotate, and further driving the back connecting component 301 and the first back connecting rod 302 to rotate relatively. It can be understood that the first back connecting rod 302 rotates away from the third limiting component 305, and at this time, the third limiting component 305 no longer limits the relative rotation between the first back connecting rod 302 and the back connecting component 301.

[0118] Further, as shown in Figure 2 , Figure 3 and Figure 10 , when the third limiting component 305 contacts the first back connecting rod 302, the included angle a between the first connecting part 3011 and the movable base 101 is the minimum value, which meets the requirements of the seat device for the sitting posture state and the TV posture state.

[0119] In some examples, the second back connecting rod 303 is provided with a fourth limiting component 306, and the fourth limiting component 306 plays a one-way limiting role on the back connecting component 301. Specifically, the fourth limiting component 306 is formed as a limiting column, and the position of the fourth limiting component 306 corresponds to the position of the back connecting component 301. When the seat device switches between the sitting posture state and the TV posture state, the fourth limiting component 306 is separated from the back connecting component 301, at this time, the fourth limiting component 306 does not form a limiting support role on the back connecting component 301, and the back connecting component 301 is supported by the first back connecting rod 302, so that the included angle a between the first connecting part 3011 and the movable base 101 is maintained at the minimum value.

[0120] However, when the seat device is converted from the TV posture state to the lying posture state, the fourth limiting component 306 contacts the back connecting component 301, thereby forming a support on the back connecting component 301, avoiding the relative movement of the back connecting component 301 and the second back connecting rod 303, at this time, the included angle a between the first connecting part 3011 and the movable base 101 is the maximum value, which meets the requirements of the seat device for the lying posture state.

[0121] In some examples, as shown in Figure 5 , the seat device further comprises a driving assembly 800 for driving the seat device to change posture. Specifically, the driving assembly 800 comprises a slide rail 801 and a slide block 802, and it can be understood that the slide block 802 is slidingly connected to the slide rail 801.

[0122] In some examples, as shown in Figure 5 and Figure 6 , the slide rail 801 is fixedly arranged on the fixed base 102, and the movable base 101 is provided with a first cross beam 803, and the first cross beam 803 is rotationally connected to the movable base 101.

[0123] Further, the first cross beam 803 is provided with a transmission assembly, which on the one hand ensures the connection between the first cross beam 803 and the leg assembly 200, and on the other hand ensures the connection between the first cross beam 803 and the sliding block 802.

[0124] Wherein, the sliding stroke of the sliding block 802 on the sliding rail 801 has a first interval and a second interval, the first interval here is the A interval in Figure 5 , and the second interval here is the B interval in Figure 5 . When the sliding block 802 slides in the first interval, the sliding block 802 drives the first cross beam 803 to rotate through the transmission assembly, and the first cross beam 803 drives the leg assembly 200 to stretch and retract through the transmission assembly in the process of rotating, while the angle a between the first connecting part 3011 of the back connecting part 301 in the back assembly 300 and the movable base 101 is maintained at a minimum value, at this time the seat device is switched between the sitting state and the TV state.

[0125] When the sliding block 802 slides in the second interval, since the leg assembly 200 has been fully stretched, the first cross beam 803 no longer rotates relative to the movable base 101, and the sliding block 802 drives the movable base 101 to adjust the angle through the transmission assembly, thereby driving the second swing part 602 to swing relative to the movable base 101, the angle a between the first connecting part 3011 of the back connecting part 301 in the back assembly 300 and the movable base 101 changes, at this time the seat device is switched between the TV state and the lying state.

[0126] In some examples, the position where the first cross beam 803 is connected to the movable base 101 is located between the third back connecting rod 304 and the second swing part 602, since the side of the back assembly 300 close to the first cross beam 803 is provided with the second back connecting rod 303 and the third back connecting rod 304 which are hinged to each other, it can avoid the second back connecting rod 303 being too close to the first cross beam 803, thereby avoiding the interference between the first cross beam 803 and the second back connecting rod 303.

[0127] In some examples, as shown in Figure 5 and Figure 6 , 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 sliding block 802, and the other end is connected to the first cross beam 803. At the same time, one end of the second transmission rod 805 is fixedly connected to the first cross beam 803, and the other end is hinged to one end of the third transmission rod 806, and 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 are connecting rod mechanisms between the first cross beam 803 and the leg assembly 200.

[0128] The embodiment of the present application provides a seat, which comprises a seat cushion, a leg support, a backrest and the seat device. It can be understood that the seat cushion is installed on the top of the movable base 101, the leg support is installed on the leg assembly 200, and the backrest is installed on the first connecting part 3011 of the back connecting part 301.

[0129] The seat device has a sitting state, a TV state and a lying state, as shown in Figure 1 , Figure 12 and Figure 13 When the seat device is in the sitting state, the first swing part 401 is located at the limit position of the first rotating direction, the second swing part 602 is located at the limit position of the third rotating direction, so that the leg assembly 200 is retracted to the bottom of the movable base 101, and the included angle α between the first connecting part 3011 of the back assembly 300 and the movable base 101 is the minimum value, which meets the demand of a user for a regular sitting state. The first rotating direction is the V direction in Figure 12 , and the third rotating direction is the X direction in Figure 13 .

[0130] When the seat device is in the TV state, the first swing part 401 is located at the limit position of the second rotating direction, the second swing part 602 is located at the limit position of the third rotating direction, so that the leg assembly 200 is extended to the outside of the movable base 101, and the included angle α between the first connecting part 3011 of the back assembly 300 and the movable base 101 is the minimum value, which meets the demand of a user for a TV state. The second rotating direction is the U direction in Figure 12 .

[0131] When the seat device is in the lying state, the first swing part 401 is located at the limit position of the second rotating direction, the second swing part 602 is located at the limit position of the fourth rotating direction, so that the leg assembly 200 is kept extended, and the included angle α between the first connecting part 3011 of the back assembly 300 and the movable base 101 is the maximum value, which meets the demand of a user for a lying state. The fourth rotating direction is the W direction in Figure 13 .

[0132] In addition, when the seat device is in the lying state, the angle of the movable base 101 relative to the fixed base 102 is increased, so that the user is in a natural posture in a weightless state, thereby realizing "zero gravity" of the seat. Meanwhile, when the seat device is converted from the sitting state to the TV state or the lying state, the movable base 101 and the back assembly 300 always move towards the front side of the seat device, and when the seat device is placed, a space for posture conversion does not need to be reserved on the rear side of the seat device, thereby realizing "zero wall" of the seat.

[0133] The embodiments of the present application are described in detail above with reference to the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made by those skilled in the art within the scope of knowledge of the technical field without departing from the spirit of the present application. Furthermore, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A seating arrangement, characterized in that The utility model relates to a kind of adjustable chair, including: Base assembly, including adjustable movable base (101) and fixed base (102) of relative position; Leg assembly (200), articulated to the movable base (101), the leg assembly (200) is expanded or shrunk by the rotation relative to the movable base (101); Backrest assembly (300), the backrest assembly (300) includes backrest connecting component (301), first backrest connecting rod (302), second backrest connecting rod (303) articulated to the movable base (101) and third backrest connecting rod (304), the backrest assembly (300) is angle-adjusted by the rotation relative to the movable base (101); First movement assembly, including swing mechanism (400) and support mechanism (500) articulated to the fixed base (102), the swing mechanism (400) includes first swing component (401) articulated to the movable base (101), the support mechanism (500) and the leg assembly (200) are connected with the swing mechanism (400) respectively;When the first swing component (401) is rotated relative to the movable base (101), the leg assembly (200) is expanded or shrunk;The support mechanism (500) includes first support rod (501) and second support rod (502) articulated to each other, the first support rod (501) is articulated to the fixed base (102), and the second support rod (502) is articulated to the movable base (101); Second movement assembly, including support component (601) articulated to the fixed base (102) and second swing component (602) articulated to the movable base (101), the third backrest connecting rod (304) is articulated to the second swing component (602), and the support component (601) and the backrest assembly (300) are articulated to the second swing component (602) respectively;When the second swing component (602) is rotated relative to the movable base (101), the backrest assembly (300) is angle-adjusted.

2. The seating arrangement of claim 1, wherein, The movable base (101) is provided with first limiting component (503), the first limiting component (503) 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 arrangement of claim 1, wherein, The backrest connecting component (301) includes second connecting portion (3012) and first connecting portion (3011) for connecting backrest, the first connecting portion (3011) and the second connecting portion (3012) are angularly connected, one end of the first backrest connecting rod (302) is articulated to the second connecting portion (3012), the other end is articulated to the second swing component (602), one end of the second backrest connecting rod (303) is articulated to the second connecting portion (3012), the other end is articulated to the third backrest connecting rod (304).

4. The seating arrangement of claim 3, wherein, The back connecting component (301) is provided with a third limiting component (305) for limiting rotation of the back connecting component (301) relative to the first back connecting rod (302), and when the third limiting component (305) contacts the first back connecting rod (302), the included angle between the first connecting part (3011) and the movable base (101) is the minimum value.

5. The seating arrangement of claim 3, wherein, The second back connecting rod (303) is provided with a fourth limiting component (306) for limiting rotation of the back connecting component (301) relative to the second back connecting rod (303), and when the fourth limiting component (306) contacts the second connecting part (3012), the included angle between the first connecting part (3011) and the movable base (101) is the maximum value.

6. The seating arrangement of claim 1, wherein, The seat device further comprises a linkage component (604), 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), the second support rod (502) is provided with a sixth limiting component (605), the sixth limiting component (605) is used for limiting rotation of the linkage component (604) relative to the second support rod (502), and when the linkage component (604) contacts the sixth limiting component (605), the linkage component (604) supports the second support rod (502).

7. The seating arrangement of claim 6, wherein, The first swing component (401) is provided with a seventh limiting component (404), and when the linkage component (604) contacts the seventh limiting component (404), the seventh limiting component (404) is used for limiting movement of the linkage component (604) to limit rotation of the second swing component (602) through the linkage component (604).

8. The seating arrangement of claim 1, wherein, The seat device further comprises a driving assembly (800) for driving the seat device to change posture, the driving assembly (800) comprises a slide rail (801) and a sliding block (802), the slide rail (801) is fixedly arranged on the fixed base (102), the movable base (101) is provided with a rotatable first cross beam (803), the first cross beam (803) is provided with a transmission assembly, the sliding block (802) is connected to the first cross beam (803) through the transmission assembly, and the first cross beam (803) is connected to the leg assembly (200) through the transmission assembly.

9. The seating arrangement of claim 8, wherein, When the sliding block (802) slides in the first interval of the slide rail (801), the sliding block (802) drives the first cross beam (803) to rotate to drive the leg assembly (200) to stretch and retract through the transmission assembly; when the sliding block (802) slides in the second interval of the slide rail (801), the sliding block (802) drives the movable base (101) to adjust the angle to drive the second swing component (602) to swing.

10. The seating arrangement of claim 8, wherein, The transmission assembly comprises 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 sliding block (802), the other end is connected to the first cross beam (803), one end of the second transmission rod (805) is fixedly connected to the first cross beam (803), the other end is hinged to the third transmission rod (806), and the third transmission rod (806) is hinged to the leg assembly (200).

11. The seating arrangement of claim 1, wherein, The seat device further comprises a leg assembly (700) for supporting the seat device, the leg assembly (700) connects the first support rod (501) and the fixed base (102), and when the first support rod (501) rotates relative to the fixed base (102), the leg assembly (700) extends or retracts.

12. The seating arrangement of claim 11, wherein, The leg assembly (700) comprises a first leg connecting rod (701) and a second leg connecting rod (702), one end of the first leg connecting rod (701) is hinged to the first support rod (501), and the other end is provided with a roller (703); one end of the second leg connecting rod (702) is hinged to the first leg connecting rod (701), and the other end is hinged to the fixed base (102).

13. The seating arrangement of claim 12, wherein, The first leg connecting rod (701) is provided with an eighth limiting part (704) and a ninth limiting part (705), the eighth limiting part (704) and the ninth limiting part (705) are used for limiting the rotation of the second leg connecting rod (702) relative to the first leg connecting rod (701); when the second leg connecting rod (702) contacts the eighth limiting part (704), the leg assembly (700) retracts to the limit position in the direction close to the first support rod (501); when the second leg connecting rod (702) contacts the ninth limiting part (705), the leg assembly (700) extends to the limit position in the direction away from the first support rod (501).

14. The seating arrangement of claim 1, wherein, When the seat device switches between the sitting state and the TV state, the first back connecting rod (302) and the second back connecting rod (303) remain relatively stationary with the movable base (101); when the seat device switches between the TV state and the lying state, the first back connecting rod (302) and the second back connecting rod (303) rotate relative to the movable base (101).

15. A seat characterized in that, Comprise: The seat device according to any one of claims 1 to 14, the seat device has a sitting state, a TV state and a lying state; When the seat device is in the sitting state, the first swing part (401) is located at the limit position of the first rotation direction, and the second swing part (602) is located at the limit position of the third rotation direction; When the seat device is in the TV state, the first swing part (401) is located at the limit position of the second rotation direction, and the second swing part (602) is located at the limit position of the third rotation direction; When the seat device is in a lying position, the first swing component (401) is located at a limit position in a second rotation direction, and the second swing component (602) is located at a limit position in a fourth rotation direction. The second rotation direction is opposite to the first rotation direction, and the fourth rotation direction is opposite to the third rotation direction.

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