Field of the invention

[0001]The invention relates reclining chair.

Background

[0002]There are several variants of adjusting the seating position of reclining chairs. That is, adjusting the way the seat and the back move relative to one another and relative to the base. Traditional reclining chairs with movable backs suffer from several disadvantages.

[0003] In typical reclining chairs and sofas, when the back is reclined, the seat lifts upwards and is slide forwards, resulting in an unfavorable sitting position and reduces the available space in front of the chair. Document NO 328012 Bl discloses a reclining chair comprising a back-support part 3, a seat 4, a support frame 5 which can rotate around a stationary vertical axis. The support base 5 comprises an actuator fixed to the support base in at least one end and connected to the front end of the seat part. The back-support part comprises two articulated joints 13, 14 rotatably connecting the back-support part to the support base 5. The seat part 5 is rotatably connected to the back support in the back end and rotatably connected to the actuator in the front end. The solution from NO 328012 Bl has the drawbacks that the seat will be lifted and moved forward when the back is reclined.

[0004] Other variants have a stationary seat while the back rotates in relation to the seat. The leads to an uncomfortable reclined position for the back supports moves away from the seat and the lower back loses its support.

[0005] Some recliner chairs are also equipped with a separate headrest. However, there has been a disadvantage that the angle of the headrest relative to the back does not change in relation to the position of the back rest, that is, the angle between the headrest and the chair back stays the same.

[0006] Further variants, such as typical office chairs and the like, may have a reclining seat and back rest, wherein the angle between the seat and back rest is fixed, while the seat will change its inclination relative to the horizontal plane.

[0007] Document EP3212037B1 discloses a seating furniture wherein the seat, base and back rest are jointly coupled to allow for synchronous movement of the seat and backrest in relation to the horizontal plane, when the backrest is reclined. The chair comprising a back-support part 11, a seat part 1, a support base 7 which can rotate around a stationary vertical axis. The support base 7 comprises an actuator 2 rotatably connected to the support base 7 through rotatable connection 5 in one end and rotatably connected 12 to the back-support part 11, the back-support part 11 Is rotatably connected to the seat part 1 through a rotatable connection 14 and to the actuator 2 through a rotatable connection and to the support frame 7 through rotatable link arms 8, 10, 13. The actuator 2 is not supported from rotation nor fixed the base, but rotatably attached to both the base 7 and the back-support part 11. The back-support comprises a two-point connection to the base and the actuator, resulting in large stress in the material between the attachment points 10, 12. Furthermore, the complex arrangement with link arms 8, 10, 13 under stress makes the arrangement subjectable to unwanted movement and play between the moving parts.

[0008] Document WO 00/01279 Al discloses a reclining chair or comprising a back- support part 4, a seat part 3, a support base 2 which can rotate around a stationary vertical axis. The support base 2 comprises an actuator rotatably connected to the support base 2 in one end, and in another end fixed to the back-support part 4, wherein the actuator is further rotationally linked to the seat part 3 via cross braces 7.

[0009] None of the prior art documents provides a solution wherein the movement and position of a headrest is connected with movement and position of the seat nor does any of the prior art provide a solution wherein the back rest for the lower back rises, in relation to the seat, to support the lower back of a user, when the user reclines the back part.

[0010] An object of the present invention is to provide a recliner, which provides lower back is support when the body changes from a normal sitting position into a resting position.

[0011] Another object of the present invention Is to provide a recliner chair in which the lower back support moves In relation to the back side of the seat, when the back is reclined, to follow the anatomical change in a body sitting in the chair.

[0012] Another object of the present invention is to provide a recliner chair in which the seat does not move in translational direction.

[0013] Another object of the present invention is to provide a recliner chair, in which the inclination of the seat adapts with the inclination of the back.

[0014] Still another object of the present invention is to provide a recliner chair, in which the headrest inclines forwards when the back reclines and seat tilts. [0015] It is further an aim of the present invention to overcome the shortcomings of the disclosed prior art and to provide an alternative to the prior art.

Summary of the invention

[0016]The invention is set forth and characterized in the main claims, while the dependent claims describe other characteristics of the invention.

[0017]Thus, there is provided a chair arrangement comprising a back-support part a seat part and a support frame connected to a base the support frame being arranged to support the back-support part and the seat part. The seat part comprises seat frame and an at least a first connection part wherein the seat frame comprises a front end and a back end and wherein the seat frame is connected to the support frame between the front end and a back end through at least a rotatable first connection joint wherein the seat part is pivotable around a stationary and horizontal axis running through the first connection joint and wherein the first connection part is fixed to and protruding from the seat frame at an angle in relation to the seat frame. The support frame comprises an actuator the actuator comprises a first and second end, wherein the actuator is fixed to the support frame at a connection portion and in the second end retractable and extendable on a linear fixed path in relation to the first end. The back support part comprising a back support frame and at least a second connection part fixed to, and protruding a distance from the lower part of the back support frame an angle in relation to the back support frame wherein the first connection part and the second connection part are rotably connected through at least one second connection joint wherein the second end of the actuator is rotably connected to the back support part though a third connection joint. The back end of the seat part is arranged to be lowered in relation to the first connection joint and the front end of the seat part is adapted to be elevated in relation to the first connection joint whereupon the back-support part rotates around the second connection joint to recline the back-support part. The back end of the seat part is further arranged to be elevated in relation to the first connection joint and the front end of the seat part is adapted to be lowered in relation to the first connection joint whereupon the back-support part rotates around the second connection joint to incline the back-support part.

[0018] In an embodiment, the back support part further comprises an actuator connection arm is fixed to, and protruding a distance from, the lower end LE of back support frame or the second connection part and wherein the second end of the actuator is rotably connected, through the third connection joint to the actuator connection arm. [0019] In a further embodiment the second end of the actuator is rotabiy connected, through the third connection joint to the lower end LE of back support frame.

[0020] In a further embodiment the second end of the actuator is rotabiy connected, through the third connection joint to the second connection part

[0021] In a further embodiment the support frame is rotatably connected to the base via a base mount comprising respective coupling portions, wherein the support frame is arranged to rotate around a stationary vertical axis.

[0022] In a further embodiment back support part further comprises a head support frame wherein the head support frame is rotatably connected to the back support frame via head support connection joint.

[0023] In a further embodiment the back support part further comprises head support inclination means arranged for changing the internal inclination between the back support frame and the head support frame wherein the head support inclination means comprises a first strut pivotably connected to the first connection part and a first protruding member protruding from the head support frame and a second strut pivotably connected to the first protruding member and to a second protruding member protruding from the head support frame a distance away from the first protruding member wherein the head support frame is arranged to tilt forward in relation to the back support frame whereupon the back support frame is reclined, and to tilt backwards in relation to the back support frame whereupon the back support frame is inclined.

[0024] In a further embodiment the frame of the seat part comprises at least a first set of substantially parallel seat members connected to a further set of substantially parallel seat members at a right angle, wherein the at least one rotatable connection joint connecting the seat part to the support frame is located in at least on or in at least one of the parallel seat members

[0025] In a further embodiment the support frame further comprises at least a first member connected to the at least one rotatable connection joint and a second member at a first end connected to the base mount and at a distance towards a second end, or at the second end, comprises the connection device and wherein the second member comprises a supporting portion on or at an upward facing side and wherein the second end of the actuator is supported on the supporting portion against rotational movement of the actuator and wherein the at least one first member is further attached to the second member. [0026] In a further embodiment the supporting portion comprises a supporting surface at least a distance between the first and second end of the second member wherein supporting portion is arranged for supporting the actuator and the extendable end of the actuator against rotational movement around connection device.

[0027] In a further embodiment the at least first member is connected to the at least one rotatable connection joint thorough at least one side plate.

[0028] In a further embodiment the actuator is lockable and releasable operated by a control handle, wherein the actuator is arranged for controlling the movement of the seat part in relation to a horizontal plane and the movement of the seat part in relation to the back support part.

[0029] In a further embodiment the actuator connection arm is a curved, or at least a partly curved, longitudinal member comprising a convex side facing the second connection joint wherein seat frame the actuator connection arm the first, second and third connection joint are arranged to translate rotational motion around the first connection joint into straight line motion at the second end of the actuator along the fixed path.

[0030] In a further embodiment the actuator connection arm is fixedly connected to the back support part a distance below the second connection part.

[0031] In a further embodiment the point of action of the actuator is located on the extrema end of the actuator connection arm.

Brief description of the figures

Figure 1 shows a schematic view of a reclining chair arrangement wherein the chair is seen from the side and in a reclined position.

Figure 2 shows the lower part of a reclining chair seen from a slanted view.

Figure 3 shows the underside of a reclining chair, seen from a slanted view.

Figure 4 shows a reclining chair wherein the chair is seen from the side and in an upright position.

Figure 5a and 5b shows a chair in two different positioned, reclined and upright.

Figure 6a and 6b shows a close-up view of the actuator and the arrange of the chair in an upright position and in a reclined position. Figure 7 shows a schematic view of a redining chair arrangement wherein the chair is seen from the side.

Figure 8a and 8b shows a chair arrangement in two different positioned, reclined and upright.

Detailed description of the invention

[0032] The following description will use terms such as "horizontal", "vertical", "lateral", "back and forth", "up and down", "upper", "lower", "inner", "outer", "forward", "rear", etc. These terms generally refer to the views and orientations as shown in the drawings and that are associated with a normal use of the invention wherein a user sits in the chair. The terms are used for the reader's convenience only and shall not be limiting. Like numerals on different drawings describe the same feature. Numerals with apostrophe represents an additional feature represented by the same numeral, for instance the number 9 will represent one or the first of multiple or all of the multiples, and the numeral 9' represents an additional of the same feature, like two parallel frame members 9, 9" of a frame.

[0033] All figures illustrate embodiments of the invention wherein the internal parts and arrangements are shown. In normal use these, several of these features would normally be covered with cushioning and the like. Several chair arrangements may also be arranged adjacent together to make further seating arranges such as reclinable couches, sofas and the like.

[0034] Figure 1 shows a seating furniture 1 in the form of a recliner hereinafter simply referred to as “chair” comprising a back-support part 6, a seat part 5 and a support frame 4 connected to a base 2. The support frame 4 and the base 2 is connected through a mount 3 comprising respective coupling portions, wherein the respective coupling portions may be rotatable in order for the support frame 4 to rotate in relation to the base 2. The support frame 4 being arranged to support the back- support part 6 and the seat part 5. The illustrated chair is shown without any cushioning and illustrates what is to be understood as internal mechanisms supporting and arrangements. The back support part 6 is arranged to support the back and upper body of a user during normal use and the set part is arranged to support the lower body and legs of a user during normal use. The seat part 5 comprises seat frame 7 with a front-end FE and a back-end BE, wherein the front-end FE is the area generally supporting the knees of a user using the furniture in a normal fashion. The seat frame 7 is rotably connected to the support frame 4 between the front-end FE and a back end BE in at least one rotatable first connection joint 8, wherein the seat part is rotatable around a stationary and horizontal axis A-A running through the connection joint 8. The back support part 6 is connected to the seat frame 7 via the second connection joint 26. Wherein at least a first connection part 16 is fixed to, and protruding a distance from, the back end BE of the seat part 5 and at least a second connection part 17 fixed to, and protruding a distance from, the lower part of the back support part 6 an angle in relation to the back support part 6, wherein the first connection part 16 and second connection part 17 are rotatably linked through the second connection joint. In figure 1 the first connection part 16 is fixed to and protrudes from the back-end end of the seat frame 7, and the second connection part 16 is fixed to and protrudes from the back support frame 19, thereby pivotably linking the seat frame 7 and the back support frame 19 and thus the seat part 5 and the back support 6.

[0035] Figure 2 shows the lower part of a chair arrangement with the seat part 5. The seat frame 7 of the seat part 5 comprises at least a first set of substantially parallel seat members 9, 9' connected to a further set of substantially parallel members 10, 10' at a right angle to the first set of substantially parallel seat members 9, 9', to constitute a general rectangular frame. However, it should be understood that the seat frame 7 may be any configuration of framed elements. In figure 1 the front EE and back end BE of the seat frame 7 is on the further set of the parallel members 10, 10'. Between frame members there may be elements to support the weigh from a person or thereto attached padding or cushioning elements (not shown). The at rotatable connection joints 8, 8' connects the seat frame 5 to the support frame 4 in a rotational manner thorough respective coupling portions, such as pivot and bearing, through axels, hinges or pivotable joints or the like. The rotatable connection joints 8, 8' connects the seat frame 7 in or on at least one of the parallel seat members 9, 9'.

[0036] Figure 3 illustrates an embodiment of the invention wherein the underside of the chair arrangement is shown from a slanted view, wherein the support frame 4 comprises an actuator 11 (also shown inn fig. 1). The actuator 11 comprises a first end and a second end, wherein is in a first end fixed to the support frame 4 via a connection device 14, thereby being arranged for translational movement of a second end on a fixed path FP to and from the connection device 14 of the actuator 11. The second member 13 is at a first end connected to the base mount 3 and, at a distance towards a second end, or at the second end, comprises the connection device 14, wherein the actuator 11 is fixated in a first end. The support frame 4 is rotatably connected to the base 2 via a base mount 3 comprising respective coupling portions, and wherein the support frame 4 is arranged to rotate around a stationary vertical axis B-B (see fig. 4). In an embodiment of the invention, the second end of the actuator may, in addition to be fixed by the connection device 14, also be displaceable supported or guided on a supporting portion 15, whereby the second end of the actuator 11 is further supported against rotational movement and allowed to extend and retract, thereby providing translational movement of the second end along a linear fixed path FP to and from the connection device 14 of the actuator 11. The relative movements of the of the seat part 5 in relation to a horizontal plane and the movement of the seat part 5 in relation to the back support part 6 may be controlled continuously by the actuator 11. The actuator 11 is lockable and releasable operated by a control handle (not shown) by a user. The actuator has a first end coupled to the base member 4 via a fixed and non-rotatable connection device 14.

The connection device 14 may be any suitable connection means that fixes and holds the first end of the actuator in a non-rotatable manner.

[0037] The support frame 4 may further comprise a first member 12, 12' connected to the at least one rotatable connection joint 8, 8' thorough at least one side plate 26, 26'. In figure 3, a first 8 and second 8' connection joint is situated on either side of the seat frame 7 thorough respective side plates 28, 28' on either side of the support frame. In the illustrated embodiment the at least one first member 12, 12' is further attached to a second member 13, wherein the second member 13 comprises the supporting portion 15 on or at an upward facing side. The supporting portion 15 may be a flat and straight part, of the second member comprising a gliding surface for the second end of the actuator 11 and the actuator connection arm 18 to be supported against and sliding in the extendable end retractable direction of the actuator. As the movement of the second end of the actuator 11 is linear and in line with the fixed path due to the fixed first connection joint 8, and the movable second and third connection joint 26, 27, the aid of the support portion is not necessary in certain embodiments, as the fixed connection device 14 holds the actuator in line. However, there may be embodiments wherein the supporting portion 15 can be beneficial to support the actuator 11 from rotation and to support the second end of the actuator. In another embodiment the supporting portion 15 may comprise a grove or track arrangement to allow a supported sliding motion of the second end of the actuator 11. The grove, track or gliding surface of the supporting portion 15 extends at least a distance between the first and second end of the second member 13. In an embodiment, the supporting portion 15 is arranged for supporting the third connection joint 27 at the extendable end of the actuator 11 and the actuator connection arm 18.

[0038] Figure 4 shows an embodiment of the chair arrangement with the back support part 6 comprising a second link member 17 and the seat part 7 comprising a first link member 16, wherein the first and second link members 16, 17 are pivotably connected thorough the second connection joint 26, such that the second connection joint 26 rotably connects the lower part LE of the back support part 6 and the back end BE of the seat part 5, more specifically the back part of the seat frame 7 and the lower part of the lower back frame 19. The back support part 6 further comprises an actuator connection arm 18 in a first end being fixedly connected to the lower end LE of the back support part 6 and in second end rotatably connected to the displaceable end, i.e. the second end of the actuator 11.

[0039] Fig. 5a and 5b illustrates an embodiment of the chair arrangement wherein the chair is in two different positions. In figure 5a the chair is in what is to be considered the upright position. The arrows illustrate rotational movements of the different parts from when the chair is proclined from its declined position. The frontend FE of the seat 5 rotates around the first connection joint 8 and tilts downwards, the back end BE of the seat 5 rotates around the first connection joint 8 and tilts upwards, to the state wherein the seat is almost level with a horizontal plane. In an embodiment (not illustrated), the level of the seat 5 in the upright might be completely level. The back-support part 6 is rotated forward (counter clock vise in the figure) to its upright position, around the second connection joint 26.

[0040] In figure 5b the chair arrangement is in what is to be consider the reclined position. It should be understood that the chair according to the invention may be positioned in a continues level of reclination between the upright position and the reclined position. The front-end FE of the seat 5 rotates around the joint 8 and is moved upwards, the back end BE of the seat 5 rotates around the joint 8 and is moved downwards, so the seat is inclined in relation to a horizontal plane. Both in figure 5a and 5b the rotational point of the joint 8 is stationary from translational movement both in the vertical and horizontal plane, as is illustrated with line C-C, the distance from the first connection join 8 to the ground in an upright position (illustrated in fig. 5a) is the same as the distance from the first connection join 8 to the ground in an reclined position (illustrated in fig. 5b) hence, the seat part is rotatable around a stationary and horizontal axis A-A running through the connection joint 8. In figure 5b the second end of the actuator 11 and the third connection joint 27 moves in a translational fixed vector direction towards the first end of the actuator 11 when the chair reclines. In figure 5a the second end of the actuator 11 and the third connection joint 27 moves in an opposite fixed vector direction, when the chair 1 proclines (moves from reclined to upright).

[0041]As can be seen in fig. 5b, the actuator 11 connection arm 18 and the lower end LE of the back-support part 6, slied under, at least partly, the seat 5 as the back 6 is reclined. This ensures that a user will experience sufficient back support during the reclination proses. When the back part 6 is in the upright position, as illustrated in fig, 5a, the actuator 11 is in its extended state, having a length that is longer than its compressed state. When the back part 6 is in the reclined position, as illustrated in fig. 5b, the actuator 11 is in its compressed state, as the actuator connection arm 18 has compressed the actuator 11.

[0042] The actuator 11 might be any type of actuator, gas spring, spring device, or electronic motor such as a linear motor, capable of exerting a force and/or a restoring force. The actuator 11 might also be lockable, such that the actuator 11 and the chair arrangement is lockable in any position, both in an upright position and in a reclined position and in any intermediate positioned between fully reclined and fully upright. The actuator 11 comprises at least an extended state, and a compressed state, and any state between fully compressed and fully extended. The actuator 11 is arranged for controlling the movement between the back part 6 and the seat part 5 and the support frame 4. In an embodiment of the invention, the actuator 11 exerts a force that extends the actuator 11, and in order to compress the actuator 11, an opposite and equal, or larger, force must be applied. This force is applied from the actuator connection arm 18, which is rotated around the second connection joint 26. When a user sits in the chair in the upright position and forces the back part 6 back, the forces are translated through the actuator connection arm 18 and is absorbed by the actuator 11 as it compresses.

[0043] In the embodiment of the invention illustrated in figure 5a and 5b the actuator connection arm 18 is a partly curved longitudinal member comprising a convex side facing the second connection joint 26 such that the convex side of the curved element is facing the axis of rotation (upwards in the figures) and the concave side of the member faces away from the axis of rotation (downwards in the figures). Curved or partly curved should be understood as a longitudinal member having a bend between the two extrema ends. The actuator connection arm 18, the first connection joint 8, the second connection joint 26 and the seat frame 7 are arranged to translate rotational motion around the first connection joint 8 into straight line linear motion at the second end of the actuator 11 thereby moving the second end of the actuator connection arm 18 and the second end of the actuator 11 in a straight linear motion along the path of a linear fixed path FP. This is achieved with one fixed pivot and two moving pivots, to translate rotary motion into linear motion, similar to how the motion of a slider crank device are an arrangement of mechanical parts designed to convert straight-line motion to rotary motion, or rotary motion into straight-line motion. With the seat frame 4 pivoting around the fixed pivot point of the connection joint 8, and the actuator connection arm 18 rotating around the moving second connection joint 26 and the connection point between the second end of the actuator 11 and the second end of the actuator connection arm 18, pivoting around the third connection joint 27, the invention is arranged for translating the linear movement of the actuator, into pivotal movement of the seat frame 4 and to translate rotational movement of the seat frame 4 into in line linear movement of the second end of the actuator. It should be understood that a force can be applied in between the seat frame and actuator, such as to the seat part 6, to induce movement into the system. A fixed pivot point should be understood such that the pivot point remains stationary, while a movable pivot should be understood as a pivot point that changes in the plane perpendicular to the rotational axis. For instance, the connection joint 8 will have a stationary height from a floor, regardless of the angle of the seat part 5 in relation to a horizontal plane, and the angle of the back part 6 in relation to a horizontal plane, thus the first connection joint 8 is stationary. While the height of second connection joint 26 from the floor 29 will depend on the position of the seat part 5, since the joint is connected to a displaceable end of the seat part 5, such that the moving path of the second connection joint 26 in the vertical plane corresponds to a path along the circumference of the second connection joint 26 rotating around first connection joint 8. Therefore, the location of the second connection joint 26 in the verticals plane depends on the angle of the seat frame 7. The connection joint between the second end of the actuator 11 and the second end of the actuator connection arm 18 is also a movable pivot point, as the location of the connection joint depends on the angle of the connection arm 18 (pivotable around the second connection joint 26 and the angle of the seat frame 7). However, the location of the third connection joint 27 only translates on a straight line along FP. Thereby, the point of action of the actuator 11 is located in line with the line FP and on the extrema end of the actuator connection arm 18. The actuator connection arm 18 is fixatedly connected to the lower back frame 19 of the back support part 6, a distance below the second connection link 17. In an alternative embodiment of the invention, the arrangement comprises an actuator connection arm 18 fixed to, and protruding a distance from, the lower end LE the second connection part 17, and wherein the second end of the actuator is rotably connected, through the third connection joint 27, to the actuator connection arm 18.

[0044] In an embodiment of the invention, the chair arrangement comprises head support inclination means arranged for inclining the head support frame 20 in relation to the lower back support frame 19, wherein the head support frame 20 is rotated in relation to the back support frame 19, resulting in an angle of less than 180 degrees between said frames 19, 20 when the back part 6 is reclined. In figure 5a, the head support frame 20 and back support frame 19 is generally aligned on the same line, and the two arrows around the joint 21 illustrates that the two frames 19, 20 has rotated from a reciprocal angle of less than 180 degrees, to a reciprocal angle of approximately 180 degrees, when the back 6 is rotated from reclined to upright. In figure 5b, the head support frame 20 and back support frame 19 is inclined with a reciprocal angle of less than 180 degrees, and the two arrows around the joint 21 illustrates that the two frames 19, 20 has rotated from a reciprocal angle of approximately 180 degrees, to a reciprocal angle of less than 180 degrees as the back is rotated from upright to reclined. For the head support frame to lift, i.e. rotate forward, as the back reclines, and straighten as the back goes towards upright, the head support inclination means comprises a first strut 22 connected to the first connection part 16 and to a first protruding member 24 protruding forward from the head support frame 20, and a second strut 23 connected to the first protruding member 24 and to a second protruding member 25 protruding froward from the head support frame 20 a distance away from the first protruding member 24. Wherein the head support frame 20 is adapted to tilt forward in relation to the back support frame 19 whereupon the back support frame 19 is reclined.

[0045] As seen in figure 2, an embodiment of the invention comprises parallel first connection joints 8, 8" on either side of the seat frame 7, and parallel second connection joints 26, 26' on either side of the seat frame 7, or on the further seat member 10', and back frame 19. Furthermore, the first and second link members 16, 17 comprises a pair of parallel situated first and second link members 16', 17', and parallel struts 22, 22' respectively pivotably connected to the parallel first link member 16, 16'.

[0046] Figure 6a and 6b illustrates an embodiment of the invention wherein the actuator 11 is illustrated with the chair 1 in two different positions: in the uptight position in figure 6a and in the reclined position in figure 6b. in both figures the actuator is in line with the fixed path FP and no internal rotation of the alignment of the actuator has occurred. In figure 6a the actuator is in a compressed state with a shorter distance between the first and second end, than in figure 6b. In the illustrated embodiment, the top side 15 of the second support member 13 may slidably support the second end of the actuator 11 against downwards rotation when the chair 1 is reclined. However, as the forces from the actuator arm 18 is transferred into a translational motion, the top side of the second support member 13 may not be touching nor supporting the second end of the actuator as the actuator is fixed in place in a non-rotatable manner at the connection device 14. The connection device 14 may be any type of nut and bolt configuration, or a bracket type holder or a clamping or encompassing holding device, or a combination thereof that holds the actuator in a non-rotatable manner. Therefore, in an embodiment of the invention, the support member 13 connects the base 3 to the connection device 14 without providing support for the second end of the actuator 11. [0047] Figure 7 illustrates an alternative embodiment of a chair arrangement comprising a back-support part 6, the back support part 6 comprises a lower back support frame 19 and an upper head frame 20, that may be both pivotably linked or fixedly fastened together to constitute one frame. The arrangement further comprises a seat part 5, and a support frame 4, the support frame 4 being connected to a base 2, the support frame 4 being arranged to support the back-support part 6 and the seat part 5. The seat part 5 comprises seat frame 7 with a front-end FE and a back end BE, and wherein the seat frame 7 is pivotably connected to the support frame 4 between the front end FE and a back end BE through at least a rotatable first connection joint 8 wherein the seat part is pivotable around a stationary and horizontal axis A running through the first connection joint 8. The support frame 4 comprises an actuator 11 comprising a first and second end, wherein the actuator is fixed to the support frame 4 in a non-rotatable manner at a connection portion 14, and in the second end retractable and extendable on a fixed path FP in relation to the first end and arranged for translational movement of the second end on the fixed path FP to and from the connection portion 14 of the actuator 11. The back support part 6, 19, 20 is rotably connected to the seat part 5, 7 through at least one second connection joint 26, wherein the back support part 6 comprises a lower end LE and an upper end UE. Wherein the second end of the actuator 11 is rotably connected to the back support part 6 through a third connection joint 27. At least a first connection part 16 is fixed to, and protruding a distance from, the back end BE of the seat part 5 and at least a second connection part 17 fixed to, and protruding a distance from, the lower end LE of the back support part 6 at an angle in relation to the back support part 6, wherein the first connection part 16 and second connection part 17 are rotatably linked through the second connection joint 26. In figure 7 the first connection part 16 is fixed to and protrudes from the back-end end of the seat frame 7, and the second connection part 16 is fixed to and protrudes from the back support frame 19, thereby pivotably linking the seat frame 7 and the back support frame 19 and thus the seat part 5 and the back support 6. In the illustrated embodiment, the second end of the actuator is rotably connected to the second connection part 17 by the third connection joint 27. The third connection joint is located between a first end and a second end of second connection part 17, wherein the first end of second connection part 17, is fixed to the back frame 19 and the second end is pivotably linked to the first connection part 16 through the rotatable second connection joint 26.

[0048]The chair arrangement illustrated in figure 7, the back end BE of the seat frame 7 is lowered in relation to the first connection joint 8, and the front end FE of the seat frame 7 is elevated in relation to the first connection joint 8, when the back-support 6 part rotates around the second connection joint 26 and the back-support part 6 reclines. Furthermore, the back end BE of the seat frame 7 is elevated in relation to the first connection joint 8 and the front end FE of the seat frame 7 lowered in relation to the first connection joint 8, when the back-support part 6 rotates around the second connection joint 26 and the back-support part 6 is inclined. The stationary first connection joint 8, and the movable second and third connection joints 26, 27 transfers translational movement of the second end of the actuator to rotational movement of the back part 6 and the seat part 5.

[0049] Figure 8a and 8b illustrates an embodiment of the invention wherein the second end of the actuator 11 is attached to the second connection part 17 through the third connection joint 27. In figure 8a the chair arrangement is in an upright position and in figure 8b the arrangement is in a reclined position. In figure 8a the angle a between the back frame 19 and the horizontal line C-C is grater than the angle a in figure 8b, and the angle 0 between the seat frame 7 and the horizontal line C-C is smaller in the upright position in figure 8a than in the reclined position in in figure 8b. When the arrangement is moved from reclined to upright or from upright to reclined, the second end of the actuator will move in a straight line in relation to the longitudinal direction of the actuator. The actuator may be operable as previously disclosed herein.

[0050] Although specific embodiments of the invention have been described and illustrated herein, it is recognized that modifications and variations may readily occur to those skilled in the art, and consequently, it is intended that the claims be interpreted to cover such modifications and equivalents and that the scope of the invention is to be determined from the following claims.

Reference numerals

1 Reclining chair

2 Base

3 Mount between base and chair comprising respective coupling portions

4 Support frame

5 Seat part

6 Back-support part

7 Seat frame

8, 8' First rotatable connection joint, between support frame and seat frame comprising respective coupling portions

9, 9' first set parallel seat members

10, 10' Further set of parallel seat members

11 Actuator

12, 12' First member of support frame

13 Second member of support frame

14 connection device for actuator

15 support portion where actuator is supported on 13

16 first connection part

17 second connection part

18 actuator connection arm

19 lower back support frame (19)

20 head support frame (20)

21 head support connection joint

22 First strut

23 Second strut

24 First protruding member

25 Second protruding member

26, 26’ Second rotatable connection joint, between seat frame and back frame

27 Third rotatable connection joint, between actuator connection arm and actuator

28, 28' Side plate

29 Ground/Floor