Seat unit and furniture assembly

Abstract

The utility model relates to a seat unit and a furniture assembly. The seat unit comprises a base unit and a seat unit, the seat part unit is pivotally connected with the base unit and comprises a seat frame for attaching a seat part; the leg unit comprises a leg frame and a pair of leg sliding rods capable of moving in the front-back direction of the seat unit, and the leg frame at least comprises a pair of leg longitudinal beams longitudinally extending in the front-back direction of the seat unit and a leg cross beam transversely extending between the leg longitudinal beams and connected with the leg longitudinal beams; the leg frame is connected to the bottom side of the seat frame; the utility model relates to a seat unit for a motor vehicle, comprising a seat unit, a leg longitudinal beam and an actuating unit, the actuating unit comprising at least a leg actuator, and wherein the leg longitudinal beam respectively comprises a guide rail facing outward along a lateral opening of the seat unit, in which guide rail the leg slide bar is slidably supported, such that the leg unit can be switched between a retracted position and an extended position by adjustment of the leg actuator.

Description

Technical Field

[0001] The utility model relates to a seat unit, and in addition, the utility model also relates to a furniture component. Background Art

[0002] In the prior art, various movable seat units are known, such as sofas or seats with multi-position transformation functions. With the improvement of people's living standards, the comfort requirements for sofas and seats are also increasing day by day. In the known designs, the movable seat units usually have mechanical extension devices, whereby they can be transformed between a sitting position, a leisure position (or TV position) and a lying position. When the seat unit is transformed from the sitting position to the TV position, the footrest of the seat unit extends forward, and the angle between the backrest and the seat part remains basically unchanged. When the seat unit is transformed from the TV position to the lying position, the footrest is further lifted forward and upward compared with the TV position, and the backrest reclines significantly. However, in the existing movable seats, due to the fact that the leg extension devices often adopt multi-link telescopic structures, there are disadvantages such as complex structures and cumbersome installation processes. In addition, due to the complex connection structures, there is also a risk of functional failures, such as kinematic interference between the leg unit and the seat unit and the backrest unit. Summary of the Utility Model

[0003] In view of this, the technical problem to be solved by the present utility model is to provide a movable seat with a simpler structure and easier assembly.

[0004] To solve the above technical problem, a seat unit is provided, which includes:

[0005] - A seat unit, which includes a seat frame;

[0006] - A leg unit, which includes a leg frame and a pair of leg sliding rods movable in the front-rear direction of the seat unit. Wherein, the leg frame at least includes a pair of leg longitudinal beams longitudinally extending in the front-rear direction of the seat unit and a leg cross beam transversely extending between the leg longitudinal beams, and the leg frame is connected to the bottom side of the seat frame; and

[0007] - An actuating unit, the actuating unit at least includes a leg actuator,

[0008] And wherein, the leg longitudinal beams respectively include guide rails opening outward along the lateral direction of the seat unit, and the leg sliding rods are slidably supported in the guide rails, so that the leg unit can be transformed between a retracted position and an extended position through the adjustment of the leg actuator. In the retracted position, the leg sliding rods are retracted in the leg longitudinal beams, and in the extended position, the leg sliding rods extend forward from the leg longitudinal beams.

[0009] Compared with the prior art, this leg unit abandons the traditional multi-link structure and adopts the cooperative connection between the leg sliding rod and the leg frame. This simplifies the mechanical connection structure, realizes a simpler kinematic chain, and further reduces the risk of motion jamming and dysfunction. More importantly, when the leg frame itself has shape stability, the movable part of the leg unit, that is, its leg sliding rod, can be slidably held in the leg frame. Thus, the leg unit, as an independent unit with a modular structure, can be widely applied to various types of seat units. This significantly expands the applicable field of the movable leg unit and can even be installed in seat units that originally do not have a movable leg structure.

[0010] In addition, the guide rail opens outward, which not only simplifies the assembly difficulty between the leg sliding rod and the guide rail, but also enables the movement of the leg sliding rod to occur on the lateral outside rather than the lateral inside of the seat unit, thus avoiding motion interference with the actuating unit. On the one hand, this allows for an improvement in the operating reliability of the mechanical extension device, and on the other hand, it allows the leg unit to be designed narrower, achieving a compact and aesthetic structure.

[0011] In a preferred embodiment, the leg sliding rod includes a slider, and the slider is arranged in the guide rail in a form-fitting manner, so that the leg sliding rod can be slidably supported in the guide rail.

[0012] In a preferred embodiment, the leg actuator acts between the leg frame and the leg sliding rod. Particularly preferably, the leg unit further includes a guiding cross beam extending laterally between the pair of leg sliding rods, wherein one end of the leg actuator is connected to the leg cross beam, and the other end is arranged on the top side of the guiding cross beam. Thus, the leg actuator is arranged above the lowest point of the leg frame, especially above the guiding cross beam, thereby further reducing the space requirement of the leg cross beam in the height direction. Preferably, the leg actuator is configured as a linear actuator and includes a motor head, a motor guide rail, and a motor slider capable of moving along the motor guide rail. Preferably, the motor head is hinged to the leg cross beam by means of a motor bracket, and the motor slider is fixedly connected to the top side of the guiding cross beam. Alternatively, the motor slider is hinged to the top side of the guiding cross beam by means of a motor bracket.

[0013] In a preferred embodiment, the leg longitudinal beam includes at least one mounting tab, and the leg frame is connected to the bottom side of the seat frame by using the mounting tab. Preferably, a mounting plane is defined by the mounting tab, and the guide rail extends obliquely with respect to the mounting plane. Thus, the leg sliding rod lifts upward while sliding forward, which improves the comfort of the user.

[0014] In a preferred embodiment, the two ends of the leg cross beam are fixedly connected to the leg longitudinal beam. Alternatively, the two ends of the leg cross beam can also be fixedly connected to the seat unit.

[0015] In a preferred embodiment, the front end of the leg sliding rod is attached to a leg rest, and in the retracted position, the leg rest is folded at the front end of the leg longitudinal beam, and in the extended position, the leg rest is unfolded forward relative to the leg longitudinal beam.

[0016] In a preferred embodiment, the leg unit also includes a legrest connecting rod, wherein the legrest connecting rod is pivotally connected to the front end of the leg sliding rod and is fixedly connected to the legrest, so that the legrest can be pivotally connected to the leg sliding rod by means of the legrest connecting rod.

[0017] In a preferred embodiment, the leg unit further comprises a reset member, by means of which the end of the legrest connecting rod facing away from the leg sliding rod can be flipped forward. In the process of the leg unit changing from the retracted position to the extended position, the leg sliding rod slides forward along the guide rail, and the reset member causes the legrest connecting rod to flip forward together with the legrest. In the process of the leg unit changing from the extended position to the retracted position, the leg sliding rod slides backward along the leg guide portion of the leg longitudinal beam, so that the legrest is stopped by the front end of the leg longitudinal beam or the front end of the seat unit of the seat unit, and flips backward by overcoming the reset force of the reset member.

[0018] Preferably, the reset member comprises a torsion spring acting between the leg sliding rod and the legrest connecting rod.

[0019] In an alternative embodiment, the reset member includes a tensile member acting between the seat frame and the legrest, such as a tension spring, a skin that covers the seat frame and the legrest together, and the like.

[0020] In a preferred embodiment, the seat unit further comprises a base unit, which comprises a pair of fixing plates extending along the front-rear direction of the seat unit, and a rear base crossbeam extending transversely between the fixing plates and fixedly connected to the fixing plates.

[0021] Preferably, in order to further improve the stability of the seat unit, the base unit further comprises a front base crossbeam extending transversely between the fixing plates and fixedly connected to the fixing plates. Compared with the prior art, the leg unit according to the utility model is constructed flatter and the actuating unit is arranged closer to the seat frame, thereby providing more space for the lower part of the seat unit, thereby providing space conditions for the arrangement of the front base crossbeam.

[0022] In a preferred embodiment, the seat unit includes a pair of seat bearing assemblies capable of moving relative to the base unit in the front-rear direction of the seat, so as to realize the transformation of the seat unit between the reclined position and the vertical position. The seat bearing assembly at least has an upper seat longitudinal beam and a lower seat longitudinal beam extending in the front-rear direction of the seat unit. In the vertical position, the angle between the seat frame and the horizontal plane is 6° to 12°, preferably 9°; and in the reclined position, the angle between the seat frame and the horizontal plane is 16° to 28°, preferably 20°.

[0023] The seat bearing assembly is configured as a frame structure with stable shape. For this purpose, in a preferred embodiment, the seat bearing assembly further includes a front seat link and a rear seat link fixedly connected between the upper seat longitudinal beam and the lower seat longitudinal beam. Particularly preferably, the upper seat longitudinal beam and the lower seat longitudinal beam are directly fixedly connected. This way has greater advantages in terms of strength and stability. Alternatively, the seat bearing assembly is integrally constructed, for example, made by casting.

[0024] In a preferred embodiment, the seat unit further includes a backrest unit for attaching a backrest. The backrest unit is connected to the rear part of the upper seat longitudinal beam and includes a backrest bracket for attaching the backrest. Wherein, the backrest bracket is pivotally connected to the upper seat longitudinal beam, so as to realize the tilting rotation of the backrest bracket as the seat unit transforms between the reclined position and the vertical position.

[0025] Preferably, the backrest unit further includes a first backrest link and a second backrest link. Wherein, the first backrest link is connected between the backrest bracket and the second backrest link, and the second backrest link is pivotally connected to the first backrest link, the upper seat longitudinal beam and the base unit respectively, so that when the upper seat longitudinal beam moves forward, the highest point of the backrest bracket moves forward.

[0026] Preferably, when the seat unit transforms between the vertical position and the reclined position, the change in the angle between the backrest bracket and the horizontal plane is greater than 40°.

[0027] In a preferred embodiment, the actuating unit further includes a seat actuator acting between the leg cross beam and the rear base cross beam, and the movement of the seat bearing assembly in the front-rear direction of the seat unit is realized through the adjustment of the seat actuator.

[0028] To solve the technical problem, the present utility model also relates to a furniture assembly, which includes a pair of armrest parts fixedly supported on the ground, a seat part movable relative to the armrest parts, a backrest movable relative to the armrest parts, a footrest part telescopic relative to the armrest parts, and the above-mentioned seat unit.

[0029] In a preferred embodiment, the furniture assembly further includes a leg encapsulation portion that defines a receiving cavity having a rectangular cross-section, and at least a part of the leg frame, the leg sliding rod, and the actuating unit are received in the receiving cavity, thereby forming a leg movement module.

[0030] Preferably, the width of the leg encapsulation portion is from 200 mm to 400 mm.

[0031] Preferably, the furniture assembly includes a front panel that is disposed at the front of the furniture assembly and extends between the armrest portions. Wherein, the front panel includes a leg opening having a rectangular configuration, and when the leg unit is transformed between a retracted position and an extended position, the leg movement module moves in the front-rear direction of the furniture assembly through the leg opening.

[0032] Since the leg unit is integrally flatly configured, and the actuating unit, particularly the leg actuator and the seat actuator, are both disposed upwardly, a compact assembly sufficient to be received in the leg encapsulation portion is formed together with the leg unit. The thus-formed leg movement module moves in the leg opening in a manner similar to "pulling out".

[0033] In a preferred embodiment, the ratio of the width of the leg opening to the width of the panel is at most 0.6. The ratio of the height of the leg opening to the height of the front panel is at most 0.5. Particularly preferably, the height of the front panel is at most 280 mm. Thereby, the leg unit is designed to be more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] Figure 1 A perspective view schematically showing a seat unit according to an embodiment of the present invention in a sitting position;

[0036] Figure 2 Schematically showing Figure 1 A perspective view of the seat unit shown in a TV position;

[0037] Figure 3 Schematically showing Figure 1 A perspective view of the seat unit shown in a lying position;

[0038] Figure 4 Schematically showing Figure 1 A partial perspective view of the seat unit shown;

[0039] Figure 5 Schematically showing Figure 2 A partial perspective view of the seat unit shown;

[0040] Figure 6 Schematically show Figure 3 A partial perspective view of the shown seat unit;

[0041] Figure 7 Schematically show a perspective view of a seat unit according to another embodiment of the present invention, which is in a sitting position;

[0042] Figure 8 Schematically show Figure 7 A perspective view of the shown seat unit in another direction, which is in a TV position;

[0043] Figure 9 Schematically show Figure 7 A perspective view of the shown seat unit in another direction, which is in a lying position;

[0044] Figure 10 Schematically show a side view of a seat unit according to the present invention, which is in a sitting position;

[0045] Figure 11 Schematically show Figure 10 A side view of the shown seat unit, which is in a TV position;

[0046] Figure 12 Schematically show Figure 10 A side view of the shown seat unit, which is in a lying position;

[0047] Figure 13 Schematically show a top view of a seat unit according to the present invention, which is in a sitting position; and

[0048] Figure 14 Schematically show Figure 13 A top view of the shown seat unit, which is in a TV position;

[0049] Figure 15 Schematically show Figure 13 A top view of the shown seat unit, which is in a lying position;

[0050] Figure 16 Schematically show a perspective view of a furniture component according to the present invention, which is in a lying position;

[0051] Figure 17 Schematically show Figure 16 A perspective view of the shown furniture component in another direction, in which the leg unit is in a retracted position;

[0052] Figure 18 Schematically show Figure 16 A perspective view of the shown furniture component in another direction, in which the leg unit is in an extended position; and

[0053] Figure 19 Schematically shows a partial front view of a furniture component according to the present utility model. Detailed implementation manner

[0054] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present utility model.

[0055] As used herein, the term "one embodiment" or "embodiment" refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present utility model. In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein.

[0056] In addition, it should be noted here that the "front-back direction" described in this application refers to the extension direction of the furniture component, especially the leg unit of the seat unit. Specifically, "front" refers to the direction towards the leg unit, and "rear" refers to the direction towards the backrest unit. The "left-right direction" or "transverse direction" or "lateral direction" refers to the direction perpendicular to the "front-back direction" in the horizontal direction of the furniture component, especially the seat unit.

[0057] Figures 1 to 6 Exemplarily shows a seat unit according to an embodiment of the present utility model. As Figure 1 shown, the seat unit includes a base unit 1, a seat unit 2, a backrest unit 3, a leg unit 4, and an actuating unit. The seat unit is configured to be able to transform between a sitting position, a TV position, and a lying position.

[0058] In Figure 1 and Figure 4 the sitting position shown, the backrest not shown is erected and the leg unit 4 is in its retracted position; in Figure 2 and Figure 5 the TV position shown, the leg unit 4 extends forward and is in its extended position, and the backrest remains substantially unchanged; in Figure 3 and Figure 6 the lying position shown, the leg unit 4 still maintains its extended position, the seat unit 2 moves forward and tilts upward, driving the backrest to tilt backward at a significant angle.

[0059] However, in an embodiment not shown, the seat unit may also be transformed only between the sitting position and the TV position, or only between the sitting position and the lying position.

[0060] The seat unit is configured as a seat unit with armrests touching the ground, and it includes Figures 16 to 18 a pair of armrest portions 61 shown, and the armrest portions 61 are directly or indirectly attached to the base unit 1 on the one hand, for example, attached to the base unit 1 by means of Figure 1 the armrest mounting plate 60 schematically shown, and on the other hand, fixedly supported on the ground, so as to support the seat unit "suspended" above the ground.

[0061] Hereinafter, the present utility model will be illustrated by way of example with such a seat unit and a furniture assembly including the seat unit.

[0062] The base unit 1 has a fixing plate 12 longitudinally extending in the front-rear direction of the seat unit, and a rear base cross beam 13 extending transversely between the two fixing plates 12. The fixing plate 12 is fixedly connected to the inner side of the armrest mounting plate 60 fixedly connected to the armrest portion 61, for example, by means of riveting, threaded connection, etc., and the rear end of the fixing plate 12 is fixedly connected to the rear base cross beam 13 by means of a connecting strip 11 having a bent angle structure. To further improve the stability of the base unit 1, a front base cross beam 14 is further provided at the front portion of the fixing plate 12, and the front base cross beam 14 extends transversely between the fixing plates 12 and is fixedly connected thereto. Here, the fixing plate 12, the connecting strip 11, the rear base cross beam 13, and the front base cross beam 14 are, for example, independent components that can be fixedly connected respectively. However, two or more of the fixing plate 12, the connecting strip 11, the rear base cross beam 13, and the front base cross beam 14 may also be configured as an integral component.

[0063] However, alternatively, in an embodiment not shown, the base unit 1 may also have other structures. For example, it is configured as a base unit with an iron frame touching the ground, and its fixing plate 12 is not fixedly attached to the inner side of the armrest portion, but there are a plurality of legs extending downward from the fixing plate 12 for supporting on the ground; or the base unit does not have the fixing plate 12, but includes a rotating bracket rotatably supported on the ground.

[0064] In the embodiment shown in accordance with Figures 1 to 6 , the seat unit 2 includes a pair of seat bearing assemblies that are movable relative to the base unit 1 in the front-rear direction of the seat unit. The seat bearing assembly includes an upper seat longitudinal beam 21, a lower seat longitudinal beam 24, a front seat link 22 and a rear seat link 23 that are respectively fixedly connected to the upper seat longitudinal beam 21 and the lower seat longitudinal beam 24. Thus, a frame structure with stable shape is formed.

[0065] However, alternatively, the seat bearing assembly may also have other structures other than the frame structure. For example, in Figures 7 to 9 the embodiment shown, the upper seat longitudinal beam 21 and the lower seat longitudinal beam 24 are directly fixedly connected to each other, thereby providing higher stability and strength.

[0066] According to the present utility model, the seating portion 62 can be connected to the upper seat longitudinal beam 21 by means of a seat frame 20. As Figures 1 to 3 and Figure 16 shown, the seat frame 20 is fixedly connected to the seating portion 62 on the one hand, and on the other hand, the seat frame 20 is connected to the top surface of the upper seat longitudinal beam 21 with its bottom side. The seat frame can be made of a rigid material, for example, preferably made of a wooden material. In addition, the seat frame can also be made of a metal material. Preferably, the seat frame can be integrally constructed with the upper seat longitudinal beam.

[0067] The rear portion of the upper seat longitudinal beam 21 includes two upwardly directed protrusions, namely a front seat frame protrusion 21a and a rear seat frame protrusion 21b.

[0068] The seat unit 2 is movably connected to the base unit 1 by means of a linkage mechanism. However, in an alternative embodiment, the seat unit 2 can also be configured to maintain a constant relative position relative to the base unit 1.

[0069] The linkage mechanism can include a plurality of links. In particular Figure 3As shown, the linkage mechanism at least includes a front swing rod 17, a rear swing rod 18, a secondary front swing rod 17a, and a secondary rear swing rod 18a. Among them, the lower ends of the front swing rod 17 and the rear swing rod 18 are respectively pivotally connected to the fixing plate 12. The upper end of the secondary front swing rod 17a is pivotally connected to the middle part of the front swing rod 17, the lower end of the secondary front swing rod 17a is pivotally connected to the lower end of the seat frame attachment plate 22, the upper end of the secondary rear swing rod 18a is pivotally connected to the middle part of the rear swing rod 18, and the lower end of the secondary rear swing rod 18a is pivotally connected to the lower end of the lower seat part longitudinal beam 24. In addition, the linkage mechanism may further at least include an intermediate link 19a. The rear end of the intermediate link 19a is pivotally connected to the middle part of the secondary rear swing rod 18a, and the front end of the intermediate link 19a is pivotally connected to the top end of the front swing rod 17. Thus, the seat unit 2 is suspended and supported on the fixing plate 12 through the linkage mechanism, so that the seat unit 2 can be in the vertical positions as shown in Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 7 , Figure 8 , Figure 10 and Figure 11 and the reclined positions as shown in Figure 3 , Figure 6 , Figure 9 and Figure 12 . In the vertical position, the angle γ formed between the seat frame 20 and the horizontal plane EG is about 6° to 12°, preferably 9°; and in the reclined position, the angle γ formed between the seat frame 20 and the horizontal plane EG is 16° to 28°, preferably 20°

[0070] The backrest unit 3 is configured to mount a backrest (not specifically shown) of the seat unit.

[0071] Preferably, the backrest unit 3 is configured to be movable relative to the seat unit 2; however, in an embodiment not shown, the backrest unit 3 may also be configured to maintain a constant relative position with respect to the seat unit 2.

[0072] Preferably, the backrest unit 3 includes means for attaching as shown in Figure 16The backrest support 31, the first backrest link 32, and the second backrest link 33 of the backrest mounting plate 63 shown. The backrest support 31 has a generally L-shaped configuration and is pivotally connected relative to the upper seat frame longitudinal beam 21. Among them, the front end of the backrest support 31 is pivotally connected to the front seat frame protrusion 21a; the second backrest link 33 is configured as a crank member and includes three pivot points, that is, the pivot point located in the middle of the crank member and the two pivot points respectively located at the two ends of the crank member. Thereby, the upper end portion of the second backrest link 33 is pivotally connected to the lower end portion of the first backrest link 32, the upper end portion of the first backrest link 32 is pivotally connected to the middle portion of the backrest support 31, and the second backrest link 33 is pivotally connected to the rear seat frame protrusion 21b by means of the pivot point in the middle thereof. In addition, the backrest unit 3 further includes an auxiliary backrest link 34, one end of which is connected to the lower end portion of the second backrest link 33, and the other end is pivotally connected to the base unit 1, for example, preferably connected to the connecting bar 11.

[0073] In this embodiment, when the seat unit 2 moves in the front-back direction of the seat unit, the backrest support 31 reclines and tilts forward accordingly, so as to realize that the backrest unit 3 follows the seat unit 2 in the vertical positions as shown in Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 7 , Figure 8 , Figure 10 and Figure 11 shown, and the reclined positions as shown in Figure 3 , Figure 6 , Figure 9 and Figure 12 shown. For example, when the seat unit 2 moves forward, the front end of the backrest support 31 hinged to the upper seat longitudinal beam 21 moves forward. At the same time, the second backrest link 33 rotates around the pivot point of its middle portion with the rear seat frame protrusion 21b and moves forward as a whole, so that the backrest support 31 pivots backward around its pivot point with the front seat frame protrusion 21a, thereby reclining the backrest attached thereto. When the seat unit 2 changes between the upright position and the reclined position, the change in the angle between the backrest support 31 and the horizontal plane is greater than 40°. For example, in the upright position, the angle β between the front side of the backrest support 31 and the horizontal plane EG is 100° to 115°, particularly preferably 110°; and in the reclined position, the angle β between the front side of the backrest support 31 and the horizontal plane EG is 150° to 165°, particularly preferably 159°.

[0074] According to the present utility model, the leg unit 4 includes a pair of leg longitudinal beams 40, a leg cross beam 41 transversely connected between the leg longitudinal beams 40, a pair of leg sliding rods 42, and a leg rest plate 43 connected to the leg sliding rods. Among them, the leg sliding rods 42 are slidably guided and cooperate with the leg longitudinal beams 40, so that the leg sliding rods 42 can drive the leg rest plate 43 to move along the leg longitudinal beams 40 in the front-back direction of the seat unit, so that the leg unit 4 can be in Figure 1 and Figure 4 shown retracted position and Figure 2 , Figure 3 , Figure 5 and Figure 6 shown extended position. To achieve the movement synchronization of the leg sliding rods 42, a guiding cross beam 44 is transversely connected between the leg sliding rods 42. Preferably, the connection between the leg sliding rods 42 and the guiding cross beam 44 is achieved by means of welding, riveting, threaded connection, etc. The guiding cross beam 44 is located in front of the leg cross beam 41.

[0075] Both ends of the leg cross beam 41 are fixedly connected to the leg longitudinal beams 40. Preferably, the connection between the leg longitudinal beams 40 and the leg cross beam 41 is achieved by means of welding, riveting, threaded connection, etc., so as to form a leg frame with a stable shape through the leg longitudinal beams 40 and the leg cross beam 41.

[0076] The sliding guide between the leg longitudinal beams 40 and the leg sliding rods 42 can be achieved in various ways.

[0077] Preferably, the leg longitudinal beam 40 is constructed as a slide rail member. Among them, the leg longitudinal beam 40 includes a guide rail 40a with a C-shaped cross section, and the opening of the guide rail 40a opens outward along the side of the seat unit; correspondingly, the leg sliding rod 42 includes a slider 42b at its rear end. The slider 42b is fitted and movably engaged in the guide rail 40a in a shape-matching manner, so as to achieve the sliding guide of the leg sliding rod 42 along the leg longitudinal beam 40, and thus achieve the transformation of the leg unit 4 between the retracted position and the extended position.

[0078] The leg rest plate 43 is generally constructed as a plate-like member extending over at least part of the lateral width of the seat unit. The rear end of the leg sliding rod 42 is slidably inserted into the leg longitudinal beam 40, and its front end is connected to the leg rest plate 43. Preferably, the leg sliding rod 42 is connected to the leg rest plate 43 by means of a leg rest plate connecting rod 45 arranged at its front end. Especially as Figure 3 and Figure 4 shown, the leg rest plate connecting rod 45 is constructed with an L-shaped cross section, one side of which is pivotally connected to the leg sliding rod 42, and the other side is fixedly connected to the leg rest plate 43, for example, fixedly connected to the leg rest plate 43 by means of riveting, threaded connection, welding, etc.

[0079] Particularly preferably, the leg unit 4 further includes a reset member 46. In this embodiment, the reset member 46 is configured as a torsion spring, which acts between the leg sliding rod 42 and the leg rest link 45. Under the biasing action of the reset member 46, the leg rest link 45 tends to flip forward with its end away from the leg sliding rod 43.

[0080] As Figure 17 shown, when the leg unit 4 is in the retracted position, the leg rest link 45 is retracted at the front end of the leg longitudinal beam 40. Among them, the inner side of the leg rest 43 abuts against the front end of the seat unit, particularly the leg longitudinal beam 40, so as to overcome the reset force exerted by the reset member 46 and maintain its retracted position. And as Figure 18 shown, the leg unit 4 is in the extended position, in which the leg rest 43 extends forward relative to the leg longitudinal beam 40.

[0081] During the process of the leg unit 4 changing from its retracted position to its extended position, the leg sliding rod 42 slides forward, so that the leg rest 43 and the leg rest link 45 attached thereto are disengaged from the stop of the leg longitudinal beam 40. The leg rest link 45 flips forward with its end away from the leg sliding rod 42 under the biasing action of the reset member 46, thereby driving the leg rest 40 to flip.

[0082] During the process of the leg unit 4 changing from its extended position to its retracted position, the leg sliding rod 42 slides backward, driving the leg rest link 45 and the leg rest 43 to slide backward together. When the inner side of the leg rest 43 abuts against the front end of the leg longitudinal beam 40, the leg rest 43 overcomes the reset force of the reset member 46 and flips downward, thereby changing to its retracted position.

[0083] Of course, as an alternative, for example, in an embodiment not shown, the reset member 46 may also be configured as a tension member different from the torsion spring. For example, the seat part and the leg rest of the seat unit are simultaneously covered by a continuous exterior part, such as a sofa skin; or alternatively, the reset member is configured as a tension spring acting between the leg rest and the seat frame.

[0084] The leg unit 4 is integrally modularly constructed. As described above, a leg frame with a stable shape is formed by two leg longitudinal beams 40 and a leg cross beam 41. The movable components of the leg unit 4, such as the leg sliding rod 42, the guide cross beam 44 connected between the leg sliding rods 42, the leg rest link 45 connected to the leg sliding rod 42, and the leg rest 43, are movably connected relative to the leg frame. The leg unit forms a relatively independent unit, and thus can be widely applied to various types of seat units.

[0085] To install the leg unit 4, at least one mounting tab can be provided on the leg frame. With the aid of the mounting tab, the leg unit 4 can be installed on the seat frame of the seat unit or directly on the upper seat longitudinal beam 21, for example, by riveting, threaded connection, etc. A common plane is defined by the mounting tab, so that the movement of other components of the seat unit will not be interfered. Preferably, the mounting tab can be configured as a component integrally formed with respect to the leg longitudinal beam 40, or as a component fixedly connected to the leg longitudinal beam 40, such as by welding, riveting, threaded connection.

[0086] The leg longitudinal beam 40 includes at least two mounting tabs, namely a front mounting tab 48a and a rear mounting tab 48b located at its front end and rear end respectively. In this embodiment, the mounting tabs are respectively configured as bent members protruding inwards from the front end and rear end of the leg longitudinal beam 40, and are provided with rivet holes or threaded holes through which rivets or bolts can pass. As Figure 10 shown, the front mounting tab 48a and the rear mounting tab 48b together define a mounting plane E0. The leg unit 4 is installed on the bottom side of the seat frame 20 from below the seat unit by using this mounting plane. The plane E1 where the guide rail 40a of the leg longitudinal beam 40 is located extends obliquely with respect to the mounting plane E0, and the two form an acute angle. Thus, during the process of the leg unit 4 changing from the retracted position to the extended position, the leg sliding rod 42 slides forward along the upwardly inclined guiding portion, so that in the extended position, the leg rest 43 can reach a greater height, preferably higher than the height of the backrest, to achieve the "zero gravity" posture.

[0087] As Figures 13 to 15 shown, the actuating unit includes a leg actuator 47 and a seat actuator 50 that act independently of each other.

[0088] The leg actuator 47 is preferably configured as a linear actuator acting between the leg cross beam 41 and the guiding cross beam 44. The leg actuator 47 includes a motor head 471, a motor guide rail 472, and a motor slider 473 that can move along the motor guide rail 472. Among them, the motor head 471 is hinged to the leg cross beam 41 by means of a motor bracket 471a, and the motor slider 473 is fixedly connected to the upper side of the guiding cross beam 44. By adjusting the leg actuator 47, the distance between the motor slider 473 and the motor head 471 changes, so as to drive the distance between the guiding cross beam 44 and the leg cross beam 41 to increase or decrease, thereby realizing the transformation of the leg unit 4 between its retracted position and extended position.

[0089] As an alternative, the motor head 471 can also be fixedly connected to the leg cross beam 41, and the motor slider 473 can be pivotally connected to the guiding cross beam 44 by means of a bracket with a rotating shaft.

[0090] Since the leg actuator 47 is not operatively connected to the seat unit 2 or the backrest unit 3, the adjustment of the leg actuator 47 does not affect the postures of the seat unit 2 and the backrest unit 3.

[0091] The seat actuator 50 is preferably configured as a linear actuator, which includes a motor head acting between the base unit 1 and the seat unit 2 and an actuating rod that is telescopic relative to the motor head. Among them, the motor head of the seat actuator 50 can be installed on the base unit 1, preferably on the rear base cross beam 13; the actuating rod of the seat actuator 50 can be installed on the leg cross beam 41 of the leg unit 4. By means of the adjustment of the seat actuator 50, the leg cross beam 41 can be moved back and forth, and further drive the seat frame 20 indirectly connected to the leg cross beam 41 and the front and back movement of the upper seat longitudinal beam 21, and drive the backrest to tilt.

[0092] The seat actuator 50 and the leg actuator 47 can operate independently of each other, so that the adjustment of the seat unit 2 and the backrest unit 3 between the upright position and the reclined position can be implemented independently of the adjustment of the leg unit 4 between the retracted position and the extended position. Thus, with the combined action of the seat actuator 50 and the leg actuator 47, the seat unit is transformed between the sitting position, the TV position and the lying position.

[0093] As Figure 13 shown, neither the leg actuator 47 nor the seat actuator 50 is extended, the leg unit 4 is in its retracted position, the seat unit 2 and the backrest unit 3 are in the vertical position, and overall, the seat unit is in the sitting position; as Figure 14 shown, only the leg actuator 47 is extended and the seat actuator 50 is not extended. At this time, the leg unit 4 is transformed to its extended position, in which the leg sliding rod 42 extends forward from the guide rail 40a, the seat unit 2 and the backrest unit 3 are in the vertical position, and overall, the seat unit is in the TV position; as Figure 15 shown, both the leg actuator 47 and the seat actuator 50 are extended, the leg unit 4 is in the extended position, the seat unit 2 and the backrest unit 3 are in the reclined position, and the leg unit 4 is further pushed forward compared with the TV position. Overall, the seat unit is in the lying position.

[0094] As Figures 16 to 18As shown, the furniture assembly includes the above-mentioned seat unit and a pair of armrest portions 61 fixedly supported on the ground, a seat portion 62 movable relative to the armrest portions 61, a backrest mounting plate 63, and a footrest portion 64. The armrest portions 61 are fixedly connected to the fixing plate 12 of the base unit 1 by means of an armrest mounting plate 60. The seat portion 62 is attached to the seat unit 2 by means of a seat frame 20. The backrest mounting plate 63 fixedly connects a backrest (not shown) to a backrest bracket 31. The footrest portion 64 is connected to a leg sliding rod 42 of the leg unit 4 by means of a leg rest plate 43. A front sealing plate 65 extending between the armrest portions 61 is provided at the front of the furniture assembly, which generally shields the internal space of the furniture assembly from the front.

[0095] The furniture assembly further includes a leg encapsulation portion 66, which encloses a receiving cavity having a rectangular cross-section. Among them, the width D0 of the leg encapsulation portion 66 is 200 mm to 400 mm. The leg frame, the leg sliding rod 42, the leg actuator 47, and the seat actuator 50 are at least partially received in the receiving cavity, thereby constituting a leg movement module. Among them, the leg rest plate 43 extends out from the front end opening of the leg encapsulation portion 66.

[0096] To facilitate the movement of the leg unit 4, a leg opening 65a extending downward from its upper edge is provided on the front sealing plate 65. When the leg unit 4 changes between a retracted position and an extended position, the leg movement module moves in the front-back direction of the furniture assembly through the leg opening 65a. As Figure 17 shown, the furniture assembly is in a sitting position, in which the leg unit 4 is in its retracted position. Thus, the leg encapsulation portion 66 is entirely received in the internal space surrounded by the armrest portions 61 and the front sealing plate 65, and the leg rest plate 43 and the footrest portion 64 attached thereto extend out from the leg opening 65a and fitly cover the front sealing plate 65. As Figure 18 shown, the furniture assembly is in a lying position, in which the leg unit 4 is in its extended position, and the backrest unit and the seat unit are in a reclined position. Thus, the leg encapsulation portion 66 extends out from the leg opening 65a. Since the leg encapsulation portion 66 at least partially surrounds the leg unit 4, the moving parts of the leg unit 4 are hardly visible from the outside, especially the leg sliding rod 42 and the guide rail 40a.

[0097] The ratio of the width D1 of the leg opening 65a to the width D2 of the front sealing plate 65 can be at most 0.6, the ratio of the height H1 of the leg opening 65a to the height H2 of the front sealing plate 65 is at most 0.5, and the height H2 of the front sealing plate 65 is at most 280 mm. Thus, the leg unit 4 is narrowly constructed to form a compact structure.

Claims

1. A seat unit, characterized in that: The seat unit comprises: - a seat unit comprising a seat frame; - a leg unit comprising a leg frame and a pair of leg sliding rods movable in the front-rear direction of the seat unit, wherein the leg frame comprises at least a pair of leg longitudinal beams extending longitudinally in the front-rear direction of the seat unit and a leg cross beam extending transversely between the leg longitudinal beams, and the leg frame is connected to the bottom side of the seat frame; and - an actuation unit comprising at least a leg actuator, And wherein, the leg longitudinal beams respectively include guide rails extending outward along the lateral openings of the seat unit, and the leg sliding rods are slidably supported in the guide rails, so that the leg unit can be transformed between a retracted position and an extended position by adjusting the leg actuator. In the retracted position, the leg sliding rod is retracted in the leg longitudinal beam, and in the extended position, the leg sliding rod extends forward from the leg longitudinal beam.

2. The seat unit according to claim 1, characterized in that The leg sliding rod comprises a slide block which is arranged in the guide rail in a form-fitting manner so that the leg sliding rod is slidably supported in the guide rail.

3. The seating unit according to claim 1, wherein: The leg actuator acts between the leg frame and the leg sliding rod.

4. The seat unit according to claim 3, characterized in that The leg unit further includes a guide beam extending transversely between the pair of leg sliding bars, wherein the leg actuator is connected to the leg beam at one end and arranged on a top side of the guide beam at the other end.

5. The seating unit according to claim 1, wherein: The leg rail includes at least one mounting tab with which the leg frame is connected to the bottom side of the seat frame.

6. The seating unit according to claim 5, characterized in that A mounting plane is defined by the mounting webs, wherein the guide rail extends obliquely relative to the mounting plane.

7. The seating unit according to claim 1, wherein: The two ends of the leg cross beam are fixedly connected to the leg longitudinal beam.

8. The seating unit of claim 1, wherein: The front end of the leg sliding rod is attached to a leg rest. In the retracted position, the leg rest is folded at the front end of the leg longitudinal beam. In the extended position, the leg rest is unfolded forward relative to the leg longitudinal beam.

9. The seating unit according to claim 8, characterized in that The leg unit further comprises a legrest connecting rod, wherein the legrest connecting rod is pivotally connected to the front end of the leg sliding rod and is fixedly connected to the legrest, so that the legrest is pivotally connected to the leg sliding rod by means of the legrest connecting rod.

10. The seating unit according to claim 9, wherein: The leg unit further comprises a restoring member, by means of which the end of the legrest connecting rod facing away from the leg sliding rod can be flipped forward.

11. The seating unit according to claim 10, wherein: During the transformation of the leg unit from the retracted position to the extended position, the leg sliding rod slides forward along the guide rail, and the restoring member causes the legrest connecting rod together with the legrest to flip forward.

12. The seating unit of claim 10, wherein: During the process of the leg unit changing from the extended position to the retracted position, the leg sliding rod slides backward along the leg guide portion of the leg longitudinal beam, so that the leg rest is stopped by the front end portion of the leg longitudinal beam or the front end portion of the seat unit of the seat unit, and flips backward by overcoming the restoring force of the restoring member.

13. The seating unit of claim 10, wherein: The reset member includes a torsion spring acting between the leg sliding rod and the legrest connecting rod.

14. The seating unit of claim 10, wherein: The reset member includes a tension member acting between the seat frame and the leg rest.

15. The seating unit of claim 14, wherein: The tension member includes a tension spring or a skin that covers the seat frame and the legrest together.

16. The seating unit of claim 1, wherein: The seat unit further comprises a base unit, wherein the base unit comprises a pair of fixing plates extending in the front-rear direction of the seat unit, and a rear base crossbeam extending transversely between the fixing plates and fixedly connected to the fixing plates.

17. The seating unit of claim 16, wherein: The base unit also includes a front base beam extending transversely between the fixing plates and fixedly connected to the fixing plates.

18. The seating unit of claim 16, wherein: The seat unit includes a pair of seat bearing assemblies that can move relative to the base unit in the front-to-rear direction of the seat, thereby realizing the transformation of the seat unit between a reclined position and a vertical position. The seat bearing assembly has at least an upper seat longitudinal beam and a lower seat longitudinal beam extending in the front-to-rear direction of the seat unit.

19. The seating unit of claim 18, wherein: In the upright position, the seat frame forms an angle of 6° to 12° with the horizontal plane, and in the reclined position, the seat frame forms an angle of 16° to 28° with the horizontal plane.

20. The seating unit of claim 18, wherein: The seat bearing assembly further includes a front seat connecting rod and a rear seat connecting rod fixedly connected between the upper seat longitudinal beam and the lower seat longitudinal beam.

21. The seating unit of claim 18, wherein: The upper seat longitudinal beam and the lower seat longitudinal beam are directly fixedly connected.

22. The seating unit of claim 18, wherein: The seat carrier assembly is constructed in one piece.

23. The seating unit of claim 18, wherein: The seat unit also includes a backrest unit for attaching a backrest, the backrest unit is connected to the rear of the upper seat longitudinal beam, and includes a backrest bracket for attaching the backrest, wherein the backrest bracket is pivotally connected to the upper seat longitudinal beam, thereby achieving tilting and rotating of the backrest bracket as the seat unit changes between the reclined position and the upright position.

24. The seating unit of claim 23, wherein: The backrest unit also includes a first backrest link and a second backrest link, wherein the first backrest link is connected between the backrest bracket and the second backrest link, and the second backrest link is pivotally connected to the first backrest link, the upper seat longitudinal beam and the base unit respectively, so that when the upper seat longitudinal beam moves forward, the highest point of the backrest bracket moves forward.

25. The seating unit of claim 23, wherein: When the seat unit is changed between the upright position and the reclined position, the change in the angle between the backrest bracket and the horizontal plane is greater than 40°.

26. The seating unit of claim 18, wherein: The actuating unit further comprises a seat actuator acting between the leg cross beam and the rear base cross beam, and the seat bearing assembly is moved along the front-rear direction of the seat unit by adjusting the seat actuator.

27. A furniture component, characterized in that: The furniture assembly comprises a pair of armrests fixedly supported on the ground, a seat portion movable relative to the armrests, a backrest movable relative to the armrests, a footrest portion retractable relative to the armrests, and a seat unit as claimed in any one of the above claims.

28. The furniture assembly according to claim 27, characterized in that The furniture assembly further comprises a leg encapsulation portion, which encloses a receiving cavity with a rectangular cross section, and the leg frame, the leg sliding rod and the actuating unit are at least partially received in the receiving cavity, thereby forming a leg activity module.

29. The furniture assembly according to claim 28, characterized in that The width of the leg packaging portion is 200 mm to 400 mm.

30. The furniture assembly of claim 28, wherein: The furniture component includes a front cover plate, which is arranged at the front of the furniture component and extends between the armrest parts, wherein the front cover plate includes a leg opening of a rectangular structure, and when the leg unit changes between the retracted position and the extended position, the leg movable module moves along the front-to-back direction of the furniture component through the leg opening.

31. The furniture assembly according to claim 30, characterized in that The ratio of the leg opening to the width of the cover plate is at most 0.

6.

32. The furniture assembly of claim 30, wherein: The ratio of the height of the leg opening to the height of the front cover is at most 0.

5.

33. The furniture assembly of claim 30, wherein: The height of the front cover plate is at most 280 mm.

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