Seat unit for floor-standing seats with armrests and floor-standing seats with armrests

Abstract

The utility model relates to a seat unit for a floor-standing chair with armrests, comprising: a base unit fixedly connected to an armrest portion, the seat unit being movably supported above the ground by the base unit; a seat unit, comprising a pair of seat frame longitudinal beams, the seat frame longitudinal beams being movable relative to the base unit; a backrest unit connected to the rear of the seat frame longitudinal beams; and a leg unit slidable relative to the seat frame longitudinal beams, comprising a pair of leg sliding rods and a legrest connecting rod, the seat unit also comprising a leg slide rail, the leg slide rail being fixedly connected to the seat frame longitudinal beam, the leg slide rod being slidably supported in the leg slide rail, so that the leg unit is transformed between a retracted position and an extended position, in the retracted position, the legrest connecting rod is folded at the front end of the leg slide rail, and in the extended position, the legrest connecting rod is unfolded forward relative to the leg slide rail. In addition, the utility model also relates to a floor-standing chair with armrests.

Description

Technical Field

[0001] The utility model relates to a seat unit for a floor-standing type seat with armrests. In addition, the utility model also relates to a floor-standing type seat with armrests comprising the seat unit. Background Art

[0002] In the prior art, a variety of movable seat units are known, such as sofas or seats with multi-position conversion functions. With the improvement of people's living standards, the comfort requirements for sofas and seats are also increasing. In the known design, the movable seat unit is usually equipped with a mechanical extension device, which can be transformed between a sitting position, a leisure position (or a TV position) and a lying position. When the seat unit is transformed from a sitting position to a TV position, the footrest of the seat unit extends forward, and the angle between the backrest and the seat portion remains basically unchanged. When the seat unit is transformed from a TV position to a lying position, the footrest is further forward and upward than the TV position, and the backrest is significantly tilted back. However, in the existing design of movable seats, the leg extension device usually adopts a multi-link telescopic structure, which often brings the disadvantages of complex structure and cumbersome installation process; in addition, due to the complex connection structure, there is also a risk of functional failure. Utility Model Content

[0003] In view of this, the technical problem to be solved by the present invention is to provide a movable seat with a simpler structure, more flexible and convenient operation, and smaller installation space required.

[0004] In order to solve the technical problem, a seat unit for a floor-standing chair with armrests is provided, wherein the floor-standing chair with armrests comprises an armrest portion fixedly supported on the ground, and the seat unit comprises: a base unit fixedly connected to the armrest portion, and the seat unit is movably supported above the ground by the base unit; a seat unit, which comprises a pair of seat frame longitudinal beams extending in the front-rear direction of the seat unit, and the seat frame longitudinal beams are movable relative to the base unit; a backrest unit connected to the rear of the seat frame longitudinal beams; and a backrest unit connected to the rear of the seat frame longitudinal beams; and a backrest unit connected to the seat frame longitudinal beams. A leg unit with a slidable longitudinal beam, comprising a pair of leg sliding rods and a leg rest connecting rod, wherein the seat unit also comprises a pair of leg slide rails extending along the front-rear direction of the seat unit, the leg slide rails are fixedly connected to the longitudinal beam of the seat frame, and the leg sliding rods are slidably supported in the leg slide rails, so that the leg unit can be transformed between a retracted position and an extended position, in the retracted position, the leg rest connecting rod is folded at the front end of the leg slide rail, and in the extended position, the leg rest connecting rod is unfolded forward relative to the leg slide rail.

[0005] Compared with the existing technology, the leg unit abandons the traditional multi-link structure and adopts the matching connection of the leg sliding rod and the leg sliding rail. This simplifies the mechanical connection structure and realizes a simpler motion chain, thereby reducing the risk of motion stagnation and functional impairment; on the other hand, it reduces the requirement for installation height and realizes a more compact seat unit design.

[0006] In a preferred embodiment, the leg unit includes a leg rest and a reset member, wherein the leg rest connecting rod is pivotally connected to the leg sliding rod and fixedly connected to the leg rest, and the reset member acts between the leg sliding rod and the leg rest connecting rod, and with the aid of the reset member, the end of the leg rest connecting rod facing away from the leg sliding rod can be flipped forward.

[0007] In this embodiment, during the transformation of the leg unit from the retracted position to the extended position, the leg sliding rod slides forward along the leg sliding rail, and the reset member causes the legrest connecting rod together with the legrest to flip forward.

[0008] In this embodiment, during the transformation of the leg unit from the retracted position to the extended position, the leg sliding rod slides forward along the leg sliding rail, and the reset member causes the legrest connecting rod together with the legrest to flip forward.

[0009] In this embodiment, 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 slide rail, so that the leg rest is stopped by the front end of the seat frame, thereby overcoming the restoring force of the restoring member and flipping backward.

[0010] By setting the reset member, the legrest connecting rod is biased, so that the legrest connecting rod and the legrest fixedly attached thereto can flip forward without external force, that is, without being blocked. Thus, the legrest of the leg unit can automatically flip over with the sliding of the legrest connecting rod.

[0011] In a preferred embodiment, the reset element comprises a torsion spring.

[0012] In a preferred embodiment, the leg rail is fixedly connected to the seat frame longitudinal beam in an inclined manner. Thus, the leg sliding rod also lifts upward while sliding forward, which improves the comfort of the user.

[0013] In a preferred embodiment, the leg slide rail is configured as a slide guide member, and the leg slide rod is at least partially slidably engaged in the slide guide member.

[0014] In a preferred embodiment, the backrest unit comprises a backrest bracket for attaching a backrest, the front end of the backrest bracket is pivotally connected to the seat frame longitudinal beam at a first pivot point, and the middle part of the backrest bracket is pivotally connected to the base unit, so that when the seat frame longitudinal beam moves forward, the first pivot point moves forward and the highest point of the backrest bracket moves downward. Preferably, when the seat frame longitudinal beam moves forward, the highest point of the backrest bracket moves downward and forward. Thereby, a zero-wall design of the seat unit is achieved.

[0015] In a preferred embodiment, the backrest unit further comprises at least a first backrest link, and the backrest bracket is pivotally connected to the base unit at least through the first backrest link. Preferably, the first backrest link is configured as a crank member, the lower end of which is pivotally connected to the backrest bracket, the lower end of which is pivotally connected to the base unit, and the middle part of which is pivotally connected to the seat unit at a second pivot point.

[0016] In a preferred embodiment, the base unit includes a fixing plate fixedly connected to the armrest portion, the linkage mechanism includes a plurality of connecting rods, and the seat unit is movably connected to the base unit through the connecting rods, so that the seat frame longitudinal beam can move along the front and rear direction of the seat unit.

[0017] Preferably, the linkage mechanism includes a front swing link and a rear swing link, and the front swing link and the rear swing link are respectively pivotally connected to the fixed plate at their lower ends and are respectively connected to the seat unit at their upper ends.

[0018] In a preferred embodiment, the seat unit includes a first seat frame link and a second seat frame link fixedly connected to the seat frame longitudinal beam, wherein the front swing link is pivotally connected to the first seat frame link by a first auxiliary link, and the rear swing link is pivotally connected to the second seat frame link by a second auxiliary link.

[0019] In a preferred embodiment, the seat unit comprises an electric drive unit, which comprises an electric actuator acting between the base unit and the leg unit, by means of which the seat unit can be sequentially changed between a sitting position, a TV position and a lying position. In this embodiment, the electric drive unit realizes the common control of the seat unit, the backrest unit and the leg unit by means of only one actuator.

[0020] In this embodiment, preferably, the leg unit includes a leg cross beam extending laterally between the pair of leg sliding rods, wherein one end of the electric actuator is connected to the base unit and the other end is connected to the leg cross beam, and the leg unit and the seat frame longitudinal beam are caused to move successively through the extension of the electric actuator.

[0021] Preferably, the adjustment stroke achieved by the extension of the electric actuator is divided into two stages implemented successively, in which the leg unit slides relative to the seat frame longitudinal beam in the first stage, and the seat frame longitudinal beam moves relative to the base unit in the second stage. Correspondingly, the adjustment stroke achieved by the contraction of the electric actuator is also divided into two stages implemented successively, in which the seat frame longitudinal beam moves relative to the base unit in the first stage, and the leg unit slides relative to the seat frame longitudinal beam in the second stage.

[0022] In another alternative embodiment, the seat unit comprises an electric drive unit, which comprises a seat actuator acting between the base unit and the seat unit and / or a leg actuator acting between the seat unit and the leg unit, by means of which the seat unit can be changed between a sitting position, a TV position and / or a lying position. In this embodiment, the control of the seat unit, in particular the seat frame longitudinal beam, and the leg unit is implemented independently of each other by means of different actuators, thereby achieving a more flexible position change.

[0023] In this embodiment, preferably, the seat unit further includes an actuator crossbeam extending transversely between the pair of seat frame longitudinal beams. The seat actuator acts between the base unit and the actuator crossbeam, and the seat frame longitudinal beam is caused to move forward and backward relative to the base unit through the extension and contraction of the seat actuator. The leg unit includes a leg crossbeam extending transversely between the pair of leg sliding rods, and the leg actuator acts between the actuator crossbeam and the leg crossbeam, and the leg actuator is caused to slide forward and backward relative to the seat frame longitudinal beam.

[0024] In order to solve the technical problem, a seat with floor-standing armrests is also provided, which includes the above-mentioned seat unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] Figure 1 A perspective view schematically shows a seat unit with floor-standing armrests according to a first embodiment of the present invention, which is in a sitting position;

[0027] Figure 2 Schematically shown Figure 1 A perspective view of the seat unit shown in the TV posture position;

[0028] Figure 3 Schematically shown Figure 1 a perspective view of the seat unit shown in a reclining position;

[0029] Figure 4 Schematically shown Figure 1 a partial perspective view of the seat unit shown;

[0030] Figure 5 A perspective view schematically shows a seat unit with floor-standing armrests according to a second embodiment of the present invention, which is in a sitting position;

[0031] Figure 6 Schematically shown Figure 5 a perspective view of the seating unit shown in a TV posture position; and

[0032] Figure 7 Schematically shown Figure 5 A perspective view of the seat unit is shown in a lying position. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] The term "one embodiment" or "embodiment" as referred to herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the utility model. In the description of the 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, which is only for the convenience of describing the 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 cannot be understood as a limitation of the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here.

[0035] In addition, it should be noted that the "front-rear direction" in this application refers to the extension direction of the leg unit of the furniture unit, especially the seat unit. Specifically, "front" refers to the direction toward the leg unit, and "rear" refers to the direction toward the backrest unit. "Left-right direction" or "lateral direction" refers to the direction of the furniture unit, especially the seat unit, which is perpendicular to the "front-rear direction" in the horizontal direction.

[0036] Figures 1 to 3 The seat unit according to the first embodiment of the utility model is schematically shown. This seat unit is used for a floor-standing seat with armrests, which includes an armrest portion not specifically shown in the figure, and the armrest portion is fixedly supported relative to the ground. The seat unit has two halves arranged in mirror symmetry on the left and right sides, respectively including a base unit 1, a seat unit 2, a backrest unit 3 and a leg unit 4. The seat unit is constructed to be able to be sequentially transformed between multiple different positions, such as a sitting position, a TV position, and a lying position.

[0037] exist Figure 1 In the sitting position shown, the backrest is upright and the leg unit is tucked under the seat frame; Figure 2 In the TV position shown, the leg unit is extended forward and the backrest remains essentially unchanged; Figure 3 In the lying position shown, the leg unit is stretched forward, the seat moves forward and causes the backrest to be tilted at a greater angle.

[0038] The base unit 1 comprises a fixing plate 12 extending longitudinally along the front-rear direction of the movable seat, and a base crossbeam 13 extending transversely between the two fixing plates 12. The fixing plate 12 is fixedly connected to the inner side of the armrest by means of riveting, threaded connection, etc., and the fixing plate 12 is fixedly connected to the base crossbeam 13 by means of a connecting strip 11 with an angled structure. Here, the fixing plate 12, the connecting strip 11, and the base crossbeam 13 are, for example, independent components that can be fixedly connected respectively, but two or more of the fixing plate 12, the connecting strip 11, and the base crossbeam 13 can also be constructed as an integrated component.

[0039] The seat unit 2 includes a pair of seat frame longitudinal beams 21 extending in the front-rear direction of the seat unit, which are used to attach a seat portion not specifically shown. The rear portion of the seat frame longitudinal beam 21 includes two upwardly directed protrusions, namely, a front seat frame protrusion 21a and a rear seat frame protrusion 21b. In addition, the seat unit 2 also includes two first seat frame links 22 and a second seat frame link 23 directed downward from the middle portion of the seat frame longitudinal beam 21.

[0040] exist Figures 1 to 3In the illustrated embodiment, the first seat frame link 22 and the second seat frame link 23 are respectively fixedly connected to the seat frame longitudinal beam 21; however, in an embodiment not shown in the figure, the first seat frame link 22 and the second seat frame link 23 may also be constructed integrally with the seat frame longitudinal beam 21.

[0041] The seat unit 2 is movably connected to the base unit 1 by means of a linkage mechanism. The linkage mechanism includes a plurality of connecting rods. Figures 1 to 3 As 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, wherein the lower ends of the front swing rod 17 and the rear swing rod 18 are pivotally connected to the fixed plate 12 respectively, 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 first seat frame link 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 second seat frame link 23. In this embodiment, preferably, the second seat frame link 23 is constructed in a V-shape as a whole, and its opening is downward, thereby forming a rear connecting arm 23a and a front connecting arm 23b. The lower end of the secondary rear swing rod 18a is pivotally connected to the rear connecting arm 23a of the second seat frame link 23.

[0042] In addition, the linkage mechanism can also include an intermediate link 19a and a follower link 19b, wherein the rear end of the intermediate link 19a is pivotally connected to the middle part of the secondary rear swing link 18a, and the front end of the intermediate link 19a is pivotally connected to the top end of the front swing link 17; the follower link 19b is pivotally connected to the middle part of the intermediate link 19a and the top end of the rear swing link 18 with its two ends.

[0043] Thus, the seat unit 1 is supported in a floating manner on the fixing plate 12 via the linkage mechanism.

[0044] The backrest unit 3 includes a backrest bracket 31 for attaching a backrest, a first backrest link 331, and a second backrest link 332. The backrest bracket 31 is substantially L-shaped, and its front end is pivotally connected relative to the seat frame longitudinal beam 21, wherein the front end of the backrest bracket 31 is pivotally connected to the front seat frame protrusion 21a at a first pivot point P1; the first backrest link 331 is configured as a crank member, including three pivot points, namely, a second pivot point P2 located in the middle of the crank member, a third pivot point P3 located at the ends of both arms of the crank member, and a fourth pivot point P4, wherein the first backrest link 331 is pivotally connected to the lower end of the second backrest link 332 by means of the third pivot point P3 at its upper end, the upper end of the second backrest link 332 is pivotally connected to the middle of the backrest bracket 31, and the first backrest link 331 is pivotally connected to the rear seat frame protrusion 21b by means of the second pivot point P2 at its middle. Furthermore, the backrest unit 3 further comprises an auxiliary backrest link 34 , one end of which is connected to the lower end of the first backrest link 331 at a fourth pivot point P4 , and the other end of which is pivotally connected to the base unit 1 , for example preferably connected to the connecting strip 11 .

[0045] When the seat unit 1 moves in the front-to-back direction of the chair unit, the first pivot point P1 moves forward and backward accordingly, thereby causing the backrest bracket 31 to recline and tilt forward. For example, when the seat unit 1 moves forward, the front end of the backrest bracket 31 hinged to the seat frame longitudinal beam 21 through the first pivot point P1 moves forward, and at the same time, the first backrest link 331 rotates around the second pivot point P2 and moves forward as a whole, so that the backrest bracket 31 pivots backward around the first pivot point P1.

[0046] The front part of the seat unit 2 is provided with a leg unit 4. The leg unit 4 includes Figure 4 The legrest 40 , a pair of leg sliding rods 41 , a legrest connecting rod 42 , a leg cross beam 43 and a reset member 44 are shown.

[0047] The seat unit 2 further comprises a leg slide rail 24 for cooperating with the leg slide rod 41, and the leg slide rail 24 is fixedly connected to the seat frame longitudinal beam 21. The leg slide rail 24 is configured as a slide channel member, which substantially extends in the front-rear direction of the seat unit and is inclined relative to the seat frame longitudinal beam 21, thereby forming an angle with the seat frame longitudinal beam 21.

[0048] The legrest 40 is generally constructed as a plate-like member extending over at least part of the transverse width of the seat unit, which is used to attach a footrest (not shown) of the seat unit. The leg sliding rod 41 is embedded in the leg slide rail 24 with its rear portion and can slide along the leg slide rail 24. The legrest connecting rod 42 is constructed to have an L-shaped cross-section, one side of which is pivotally connected to the leg sliding rod 41 and the other side is fixedly connected to the legrest 40, for example, fixedly connected to the legrest 40 by riveting, threading, welding, etc. The leg crossbeam 43 extends laterally between the two leg sliding rods 41, thereby ensuring the movement synchronization of the leg unit 4. The reset member 44 is constructed as a torsion spring in this embodiment, which acts between the leg sliding rod 41 and the legrest connecting rod 42. Under the biasing action of the reset member 44, the legrest connecting rod 42 tends to flip forward with its end away from the leg sliding rod 41.

[0049] In such Figure 1 In the sitting position of the seat unit shown in the figure, the leg unit 4 is in the retracted position, the legrest connecting rod 42 is folded at the front end of the leg slide rail 24, wherein the inner side of the legrest 40 abuts against the front end of the leg slide rail 24, thereby overcoming the restoring force applied by the restoring member 44 and maintaining its retracted position. Figure 2 The TV posture position shown and Figure 3 In the lying position shown, the leg unit 4 is in the extended position. Figure 4 As shown, the legrest 40 is unfolded forward relative to the leg slide rail 24, wherein the leg sliding rod 41 slides forward, so that the legrest 40 and the legrest connecting rod 42 attached thereto are disengaged from the stopper of the leg slide rail 24, and the legrest connecting rod 42 is flipped forward with its end away from the leg sliding rod 41 under the biasing action of the reset member 44, thereby driving the legrest 40 to flip.

[0050] On the contrary, when the seat unit is changed from its lying position to its sitting position, the leg unit 4 is retracted, during which the leg sliding rod 41 moves backward, driving the legrest connecting rod 42 to slide backward together with the legrest 40. When the legrest 40 abuts against the front end of the leg slide rail 24 with its inner side, the legrest 40 overcomes the restoring force of the restoring member 44 and flips downward, thereby changing to its retracted position.

[0051] The seat unit also includes an electric drive unit 5. Figures 1 to 3 In the illustrated embodiment, the electric drive unit 5 comprises an electric actuator 50 acting between the base unit 1 and the leg unit 4 .

[0052] The electric actuator 50 is preferably configured as a linear actuator, which includes a motor head 501 and an actuating rod 502 that is retractable relative to the motor head. The motor head 501 is mounted on the base unit 1, preferably on the base crossbeam 13; the actuating rod 502 acts on the leg crossbeam 43.

[0053] The adjustment stroke of the electric actuator 50 is divided into two stages which are performed successively.

[0054] For example, in the seat unit from Figure 1 The sitting position shown changes to Figure 3 During the process of changing from the reclining position shown in the figure, the electric actuator 50 is extended. In the first stage, due to the weight of the user sitting on the seat, the seat unit 2 basically maintains its position relative to the base unit 1, and the posture of the backrest unit also basically remains unchanged. The actuating rod 502 only pushes the leg cross beam 43 to move forward, and then the leg sliding rod 41 slides forward along the leg slide rail 24, and drives the leg rest connecting rod 42 and the leg rest 40 attached thereto to move forward. Since the leg slide rail 24 is tilted and oriented relative to the seat frame longitudinal beam 21, the leg rest 40 is lifted upward while moving forward. In addition, during the process of the leg unit 4 sliding forward, as the stop between the leg rest 40 and the leg slide rail 24 is released, the leg rest 40 also flips forward under the action of the reset member 44, thereby realizing the unfolded position of the leg unit 4. Thereby, the seat unit 4 is moved from Figure 1 The sitting position shown changes to Figure 2 TV posture position shown.

[0055] In the second stage, the electric actuator 50 continues to extend until the leg unit 4 is fully extended, and then the leg unit drives the seat unit 2 to move forward relative to the base unit 1. At the same time, the front end of the backrest bracket 31 of the backrest unit 3 moves forward along with the seat frame longitudinal beam 21, and tilts backward around the first pivot point P1, so that the highest point of the backrest bracket 31 moves downward, and also moves forward when necessary, so that the seat unit is moved from Figure 2 TV posture position shown to Figure 3 Variations of the lying position shown.

[0056] The corresponding reverse position change of the seat unit is achieved by contracting the electric actuator 50, and the adjustment stroke achieved thereby is also divided into two stages implemented successively, in which the seat unit 2 moves relative to the base unit 1 in the first stage, and in the second stage, the leg unit 4 slides relative to the seat unit 2. No further details will be given here.

[0057] Figures 5 to 7 A seat unit with floor-standing armrests according to a second embodiment of the present invention is schematically shown, and the seat unit is configured to be able to be transformed between a plurality of different positions, such as a sitting position, a TV position, and a lying position.

[0058] and Figures 1 to 3Different from the embodiment shown, the electric drive unit 5 of the seat unit of the second embodiment includes a seat actuator 51 acting between the base unit 1 and the seat unit 2 and a leg actuator 52 acting between the seat unit 2 and the leg unit 4. With the help of the electric drive unit 5, the seat unit can be transformed between a sitting position, a TV position and a lying position.

[0059] The seat actuator 51 and the leg actuator 52 can be operated independently of each other, so that the front-rear movement of the seat unit 2 and the front-rear sliding movement of the leg unit 4 can be performed independently of each other.

[0060] like Figure 5 As shown, the actuator cross beam 25 is connected between the second seat frame links 23 in the transverse direction of the seat unit. The seat actuator 51 is configured as a linear actuator, the motor head of which is connected to the base cross beam 13, and the telescopic actuator rod acts on the actuator cross beam 25. The leg actuator 52 can also be configured as a linear actuator, the motor head of which is mounted on the actuator cross beam 25, and the actuator rod acts on the leg cross beam 43.

[0061] However, the present invention is not limited thereto. In other embodiments not shown, the electric drive unit may also only include the seat frame actuator 51 or the leg actuator 52, and accordingly, the movable seat may also only be changed between the sitting position and the TV position or only between the sitting position and the lying position.

[0062] Figure 5 The seat unit is shown in a sitting position, wherein the backrest bracket 31 is upright and the leg unit 4 is in its retracted position. If only the leg actuator 52 is extended, the leg cross beam 43 is pushed forward and the leg unit 4 is driven to change from its retracted position to its extended position. At this time, the backrest unit 3 maintains its position unchanged, thereby achieving overall Figure 6 TV posture position shown.

[0063] From the TV posture position, if the seat actuator 51 is extended, the seat unit 2 is pushed forward as a whole. At the same time, the lower end of the backrest bracket 31 of the backrest unit 3 moves forward along with the seat frame longitudinal beam 21, and the backrest bracket 31 is turned backward around the first pivot point P1 through the pivoting of the first backrest link 331, the second backrest link 332 and the auxiliary backrest link 34. At the same time, the backrest bracket 31 also moves forward, realizing the seat unit from the TV posture position to the Figure 7 Variations of the lying position shown

[0064] Of course, you can also Figure 5 The sitting position shown starts with the seat actuator 51 being extended only, so that the seat unit 2 slides forwards and the backrest support 31 tilts backwards, while the leg unit 4 remains in its retracted position.

[0065] The corresponding reverse position change of the seat unit is achieved by contracting the actuating rod of the actuator, which will not be described in detail here.

Claims

1. A seat unit for a floor-standing armrest chair, the floor-standing armrest chair comprising an armrest portion fixedly supported on the ground, characterized in that: The seat unit comprises: A base unit fixedly connected to the armrest portion, the seat unit being movably supported above the ground by the base unit; A seat unit including a pair of seat frame longitudinal beams extending in the front-rear direction of the seat unit, wherein the seat frame longitudinal beams are movable relative to the base unit; a backrest unit connected to the rear portion of the seat frame rail; and A leg unit slidable relative to the seat frame longitudinal beam, comprising a pair of leg sliding rods and a legrest connecting rod, In which, the seat unit also includes a pair of leg slides extending along the front and rear directions of the seat unit, the leg slides are fixedly connected to the seat frame longitudinal beams, and the leg sliding rods are slidably supported in the leg slides, so that the leg unit can be transformed between a retracted position and an extended position. In the retracted position, the leg rest connecting rod is retracted at the front end of the leg slides, and in the extended position, the leg rest connecting rod is extended forward relative to the leg slides.

2. The seat unit according to claim 1, characterized in that The leg unit includes a leg rest and a reset member, wherein the leg rest connecting rod is pivotally connected to the leg sliding rod and fixedly connected to the leg rest, and the reset member acts between the leg sliding rod and the leg rest connecting rod, and with the aid of the reset member, the end of the leg rest connecting rod facing away from the leg sliding rod can be flipped forward.

3. The seat unit according to claim 2, characterized in that During the transformation of the leg unit from the retracted position to the extended position, the leg sliding rod slides forward along the leg sliding rail, and the restoring member causes the legrest connecting rod together with the legrest to flip forward.

4. The seating unit according to claim 2, 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 sliding rail, so that the leg rest is stopped by the front end of the seat frame, thereby overcoming the restoring force of the restoring member and flipping backward.

5. The seating unit according to claim 2, wherein: The reset element comprises a torsion spring.

6. The seating unit according to claim 1, wherein: The leg slide rail and the seat frame longitudinal beam are fixedly connected to each other in an inclined manner.

7. The seating unit according to claim 1, wherein: The leg slide rail is configured as a slide channel member, and the leg slide rod is at least partially slidably engaged in the slide channel member.

8. The seating unit of claim 1, wherein: The backrest unit includes a backrest bracket for attaching a backrest, a front end of the backrest bracket is pivotally connected to the seat frame longitudinal beam at a first pivot point, and a middle portion of the backrest bracket is pivotally connected to the base unit, so that when the seat frame longitudinal beam moves forward, the first pivot point moves forward and the highest point of the backrest bracket moves downward.

9. The seating unit according to claim 8, characterized in that When the seat frame longitudinal beam moves forward, the highest point of the backrest bracket moves downward and forward.

10. The seating unit of claim 8, wherein: The backrest unit further comprises at least a first backrest link, and the backrest bracket is pivotally connected to the base unit at least through the first backrest link.

11. The seating unit according to claim 10, wherein: The first backrest link is configured as a bell crank, a lower end of which is pivotally connected to the backrest bracket, a lower end of which is pivotally connected to the base unit, and a middle portion of which is pivotally connected to the seat unit at a second pivot point.

12. The seating unit of claim 1, wherein: The base unit includes a fixing plate fixedly connected to the armrest portion, and the seat unit is movably connected to the base unit by means of a linkage mechanism. The linkage mechanism includes a plurality of connecting rods, and the seat unit is movably connected to the base unit through the connecting rods, so that the seat frame longitudinal beam can move along the front and rear direction of the seat unit.

13. The seating unit of claim 12, wherein: The linkage mechanism includes a front swing link and a rear swing link, and the front swing link and the rear swing link are respectively pivotally connected to the fixed plate at their lower ends and are respectively connected to the seat unit at their upper ends.

14. The seating unit of claim 13, wherein: The seat unit includes a first seat frame link and a second seat frame link fixedly connected to the seat frame longitudinal beam, wherein the front swing link is pivotally connected to the first seat frame link by a first auxiliary link, and the rear swing link is pivotally connected to the second seat frame link by a second auxiliary link.

15. The seating unit of claim 1, wherein: The seat unit comprises an electric drive unit, which comprises an electric actuator acting between the base unit and the leg unit, by means of which the seat unit can be sequentially changed between a sitting position, a TV position and a lying position.

16. The seating unit of claim 15, wherein: The leg unit includes a leg cross beam extending laterally between the pair of leg sliding rods, wherein one end of the electric actuator is connected to the base unit and the other end is connected to the leg cross beam, and the extension of the electric actuator causes the leg unit and the seat frame longitudinal beam to move in sequence.

17. The seating unit of claim 16, wherein: The adjustment stroke achieved by the extension of the electric actuator is divided into two stages which are performed successively. In the first stage, the leg unit slides relative to the seat frame longitudinal beam, and in the second stage, the seat frame longitudinal beam moves relative to the base unit.

18. The seating unit of claim 1, wherein: The seat unit comprises an electric drive unit, which includes a seat actuator acting between the base unit and the seat unit and / or a leg actuator acting between the seat unit and the leg unit. With the help of the electric drive unit, the seat unit can be transformed between a sitting position, a TV position and / or a lying position.

19. The seating unit of claim 18, wherein: The seat unit further includes an actuator beam extending transversely between a pair of the seat frame longitudinal beams.

20. The seating unit of claim 19, wherein: The seat actuator acts between the base unit and the actuator cross beam, and the seat frame longitudinal beam is prompted to move forward and backward relative to the base unit through the extension and contraction of the seat actuator.

21. The seating unit of claim 19, wherein: The leg unit includes a leg cross beam extending transversely between the pair of leg sliding rods, and the leg actuator acts between the actuator cross beam and the leg cross beam, and the leg unit is caused to slide forward and backward relative to the seat frame longitudinal beam through the extension and contraction of the leg actuator.

22. A floor-standing chair with armrests, characterized in that: It comprises the seating unit according to any one of claims 1 to 21.

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