DE102011052479B3 - seating - Google Patents

Abstract

Seating furniture (1) with a seat surface (2) and a leg rest (4) swingable about a pivot axis (13), wherein the chair is pivotable between a sitting and reclining position, for which the seat surface (2) relative to a fixed frame (3) is displaceable on the rear and the leg rest (4) is coupled to the seat surface (2) so that it is pivoted when moving the seat surface (2) backwards, wherein the leg rest (4) comprises a toothed wheel (11) and on the front frame of the seat (2) a toothing (12) is arranged, wherein the toothing (Z) with the gear (11) to V13) meshes.

Description

The invention relates to a chair, in particular an armchair or sofa, with a seat surface and a pivotable about a pivot axis leg rest, wherein the chair between a sitting and lying position is pivotally, for which the seat is displaceable relative to a fixed frame to the rear and the leg rest such is coupled to the seat, that it is pivoted when moving backwards the seat.

Such seating are known and are also referred to as sitting and lying furniture. They allow an adjustment of the position between a "normal" upright sitting position and a far back, z. B. approximately horizontally oriented lying position.

In the lying position, an additional leg rest or foot rest can be swung forwards / upwards. The problem is the distance between the front edge of the seat and the floor, which limits the size of the leg rest. To solve this problem, pull-out legrests are used, which are operated via scissors lever systems, Bowden cables, etc.

In such, from the DE 296 00 282 U1 Known armchair, it is necessary to make the adjustment by shifting the seat by pressing on the armrests, as a Parallellenkersystem is provided, which shifts the body weight and the center of gravity together with the seat back when moving the seat. The leg rest is connected to the parallel link system in such a way that it is pivoted out or swung in during pivoting. The leg rest is further formed in two parts, the two parts move when swinging against each other, so as to create a longer contact surface despite small size in the pivoted state. The parallel link system requires a relatively large height and to change the inclination of the seat when moving a toggle mechanism is necessary. To retract the extended part of the leg rest when swiveling in, a pull-in rope is provided.

The DE 20 2006 006 678 U1 discloses a chair with a swinging leg support and a swing-out support extension, the lower leg support by means of hinged joint chains in pairs near the side ends of the lower leg support hinged Scherengelenkketten from a basic position in which it forms a front panel which is located below the front end portion of the chair, in a comfort position is displaceable, in which it forms a preferably spaced from the seat part extension of the seat part, wherein the support extension is coupled via articulated lever with the link chains of the lower leg support, so that it swings when adjusting the chair.

The DE 198 30 418 A1 discloses an armchair in which the seat member is arranged to be slidable rearwardly with respect to the underframe and is coupled to the backrest by connecting means which, when the seat member is displaced rearwardly, tilt the backrest rearwardly, the backrest engaging with the seat member and the underframe is connected by adjusting means, which can make changes in the tilt angle of the backrest, regardless of the position of the seat. Further, the footrest is coupled to the base frame and the seat so as to be swung forwards / upwards when the seat is moved. For this purpose, the footrest is coupled to the underframe and the seat by a scissor system arranged inside behind or below the footrest. Similar to the one from the DE 296 00 282 U1 known chair a Bowden cable is provided, which is used to move the plate elements of a double plate arrangement against each other use.

From the DE 20 2005 000 136 U1 is known a chair whose seat consists of a tubular frame, wherein the lateral tubes are respectively provided between the front and rear provided double roller assemblies, so that the seat is horizontally displaceable.

The DE 44 30 303 A1 discloses a chair with fold-out legrest, in which the seat is pivoted when swinging the legrest up to increase the clear height under the seat part, so that the legrest can be swung despite greater length than the clear height. For this purpose, the seat part is articulated on a seat joint near the seat of the frame and the legrest with its one end to a knee joint directly to the seat part and coupled together so that the seat part in intermediate positions during insertion and Ausklappvorgang by pivoting about the seat joint on the side of his knee joint the stand surface is automatically raised.

The DE 37 18 645 A1 also discloses a chair with swiveling legrest, in which the legrest is pivotable between a folded-out with the seat part substantially unfolded end position and a folded down at least partially under the seat part end position. The leg rest consists of a thigh part and a lower leg or foot part hinged to it. These are connected by coupled drive and transmission means. In a In the intermediate position during the unfolding process, the thigh part and the foot part form an acute angle. The drive and transmission means have a coupling gear, which includes a thigh rocker, a foot pad and intermediate links. The thigh rocker is connected to the thigh part and hinged to a seat-mounted seat joint. The Fußkoppel is connected to the foot part and hinged to a knee joint of the thigh swing. The intermediate links are connected to one another at a common joint. An intermediate member is hinged to a hinge of the femoral and the other intermediate is articulated to a hinge of the pad in the vicinity of the knee joint. The Fußkoppel has a on the opposite side of the knee joint on the hinge joint projecting, the free end of the foot forming lever. The joint joint is in both end positions under the action of a holding member in each case in a stable position.

From the WO 2004/034849 A1 a mechanism for a chair is known, which allows the pivoting and simultaneous extraction of the leg rest by moving the seat backwards, which is approximately vertically downwards in the pivoted state. For this purpose, the mechanism comprises a substantially fixed, linearly extensible element, which is connected to the frame and is pivotally articulated to the leg rest, and a pivotable, linear extendable element, which is fixedly connected to the leg rest and pivotally connected to the substantially fixed, linear is pulled articulated element. The extendable elements are designed as telescopic profile rails. A portion of the substantially fixed rail is connected to the frame and the other part pivotally connected to the leg rest. One part of the pivotable profile rail is accordingly pivotable with the frame and the other part, which is fixedly connected to the legrest, is pivotally connected to the part of the substantially fixed profile rail, which is pivotally connected to the legrest. Also, when moving the seat over a parallelogram-like lever system, the substantially fixed rail is changed in orientation, so that a chair structure is achieved, despite the simple, stable construction a smooth and harmonious and soft pivoting of the legrest allowed (see, for Page 7).

From the DE 10 2006 038 736 A1 is also a chair with a seat and a swinging leg rest known, the seat is displaceable relative to a fixed frame to the rear and is hinged in the front area about setting lever and the leg rest is coupled to the seat so that they move backwards the seat is pivoted, wherein the leg rest is connected by means of a first sliding bearing on the setting levers and articulated by a second sliding bearing on the fixed frame, wherein the first slide bearing is pivotally connected to the second slide bearing, and that the second slide bearing is designed such that their Alignment changed when panning. In this case, the leg rest on a thigh part and a lower leg part, which are pivotally connected to each other, that the lower leg part is pivoted to the rearward displacement of the seat from an approximately parallel to the seat and below the seat arranged position in an approximately horizontal position.

The invention has for its object to provide a chair with a seat and a swinging leg rest, which is very simple and does not require complex mechanism for adjusting the leg rest.

This object is achieved by the recited in claim 1 seating.

Characterized in that the leg rest comprises a toothed wheel and a toothing is arranged on the front frame of the seat, wherein the toothing meshes with the gear for pivoting the leg rest about the pivot axis, it is possible to provide the pivotability of the leg rest by means of a simple mechanical solution.

In other words, the seat has between the frame and seat on a gear transmission, which transmits by means of a toothing and meshing with the toothed gear derived from the seat adjustment movement on the pivot axis of the leg rest.

It is understood that this includes both the use of a single gear transmission and the use of two or more gear transmissions. When using a single gear transmission, this is preferably arranged centrally and stiffened the rest of the furniture accordingly. When using two gear transmissions, these are preferably arranged laterally on the left and on the right.

It is of great advantage that the respective end positions of the swiveled and pivoted positions can be predetermined by simple stops. Thus, the degree of visibility in the pivoted position and the height in the pivoted position can be preset.

Both the toothing and the gear can be hegestellt as stampings.

It makes sense that the teeth rotatably attached to the front frame of the seat. That For example, it is non-rotatably attached to a tab down. Thus, the movement of the seat is passed to the gear. Preferably, the toothing is arranged such that it drives the gear of the legrest when moving the seat backwards.

It is particularly preferred if the toothing is circular-segment-shaped. This is useful to maintain the contact between the teeth and the gear, even if the front frame of the seat over the set lever when moving to the rear changes its height.

It is also particularly preferred when the gear is rotatably connected to the pivot axis of the leg rest, in particular rotationally fixed to the pivot axis itself is arranged. Thus, the gear can be driven directly from the teeth and at the same time also drive the legrest directly. For this purpose, it makes sense if the gear or the pivot axis are firmly connected to the main lever of the leg rest.

It is preferred if the pivot axis is arranged on the fixed frame. It can e.g. be arranged on the lower trailing arms in the front area.

In addition to the manual drive by shifting the weight, a (electro) motor, pneumatic or hydraulic drive for adjusting the leg rest and / or the seat can be provided. Preferably, electric geared motors from the field of automobile seat adjustment are used.

In order to introduce the driving force into the "gearbox", it is provided that the drive is operatively connected to the first gearwheel via a second, in particular geared, gearwheel. In particular, this second, drive gear is then arranged approximately opposite to the toothing side of the gear, so that the drive is selectively mountable.

Also possible is the direct drive of the pivot axis.

If the toothing and the gear are fixed by means of a clasp at a distance to each other, it is possible to build the gear despite the simplest construction stable and stiff. In addition, the clasp can be used in the manner of a deployment lever, which incorporates the front seat frame according to the known type in the movement of a quasi-parallelogram or a trapezoidal four-membered kinematic chain. Thus, it is possible to dispense with additional components.

It makes sense that the seating on stops for determining the respective end positions (sitting position or lying position). These can either be integrated as stops in the frame in the mechanical manual version or, alternatively, in the driven version as limit switches in the drive itself.

The invention also allows the leg rest to be positioned in any position along the movement between the sitting posture and lying posture, and also to be loaded in this selected position.

It is understood that a backrest which can be pivoted independently of the seat surface and with respect to the seat surface can be present. It is also possible to provide a backrest coupled to the seat movement.

Further details and advantages of the invention will become apparent from the following description of an embodiment with reference to the drawing. Show it:

1 a side view of a first embodiment of a chair according to the invention, wherein the leg rest is in the pivoted position;

2 a perspective view of the armchair 1 ;

3 a side view of the armchair 1 wherein the leg rest is in the pivoted position;

4 a perspective view of the armchair 3 ;

5 a side view of a second embodiment of a chair according to the invention, wherein the leg rest is in the pivoted position;

6 a perspective view of the armchair 5 ;

7 a side view of the armchair 5 wherein the leg rest is in the pivoted position;

8th a perspective view of the armchair 7 and

9 another perspective view of the chair 5 ,

In the figures one is as a whole with 1 designated armchair or the underlying this mechanics shown, for reasons of clarity, any existing backrest, swivel base, armrests, etc. are omitted. It is understood that the backrest can be firmly coupled with the still to be described movement of the legrest or can be configured completely independently adjustable.

In the 1 to 4 is a manual version with adjustment of the chair position by weight shifting and in the 5 to 9 a motor driven version shown.

The armchair 1 is between one in the 1 and 2 shown sitting position and one in the 3 and 4 shown lying position adjustable.

The armchair 1 includes a seat 2 , a fixed frame 3 and a retractable and retractable and swing out and leg rest 4 , In the sitting position is the leg rest 4 swung in and swung out in the lying position.

From the leg rest 4 are for better clarity, only the two main levers 15 shown. It is understood that further elements are present, in particular a support bridging the two levers.

The seat 2 consists essentially of a tubular frame 5 , are hung in the springs, not shown, to form the actual edition.

The tubular frame 5 is with two parallel cheeks 6 of the frame 3 to form a system enabling the adjustment in the manner of a quasi-parallelogram or a trapezoidal four-membered kinematic chain connected, in principle, from the own DE 20 2005 006 216 U1 is known.

When adjusting between sitting and lying on the one hand, the seat 2 in comparison to the frame 3 shifted to the rear and raised on the other front and lowered at the back.

The tubular frame 5 the seat 2 is in the rear area over a welded tab 7 , a verschenkbar associated lever 8th and another pivotable lever 9 with the respective cheek 6 connected.

In the front area is the tubular frame 5 the seat 2 each via a gear transmission 10 with the respective cheeks 6 adjustable connected.

The gear 10 essentially comprises a gear 11 , the leg rest 4 is assigned, and a gearing 12 that the front tube frame 5 is assigned, with the gearing 12 with the gear 11 for pivoting the leg rest 4 around the pivot axis 13 combs.

This is the gearing 12 rotatably on the tubular frame 5 the seat 2 over a tab 14 attached.

The gearing 12 is formed in a circle segment and arranged such that it moves when moving the seat 2 behind the gear 11 the leg rest 4 drives.

This is the gear 11 rotatably with the pivot axis 13 the leg rest 4 connected or rotationally fixed to the pivot axis 13 arranged yourself. A rotation of the gear 11 thus causes a rotation of the pivot axis 13 and thus a pivoting of the pivot axis 13 connected main lever 15 and thus the leg rest 4 ,

The pivot axis 13 is at the front ends of the cheeks 6 rotatably received and connects them.

The tabs 14 are by means of a pole 16 connected to the gearing 12 each at the tab 14 be upheld.

Between rod 16 and pivot axis 13 is each left and right gears 10 next to a clasp 17 arranged the rod 16 and pivot axis 13 lever-like and movable connects. Thus puts the clasp 17 the pole 16 and the pivot axis 13 stuck in the distance to each other, thus ensuring that the gears 11 and the gears 12 stay in touch with each other.

Also serves the clasp 17 together with the gearbox 10 and the tab 14 at the same time as raising lever for the tubular frame 5 ,

In addition, the rod stiffen 16 and the pivot axis 13 the mechanic.

So, if the user presses backwards or shifts his weight accordingly, the adjustment takes place between sitting and lying position, wherein the seat surface 2 in comparison to the frame 3 moved backwards and raised in front and lowered at the back. The meshing meshes 12 with the gear 11 , which thereby (in the clockwise sense in 1 ) turns and thus the connected lever 15 around the pivot axis 13 pivoted.

The in the 5 to 9 shown variant 1' essentially corresponds to the just described, so that only the differences will be discussed and corresponding reference numerals have been used for corresponding parts.

In contrast to the above example, the adjustment of the chair position takes place via an electric geared motor 18 ,

This is lateral on one of the cheeks 6 of the frame 3 arranged and includes a motor part 19 and a transmission part 20 that has a second gear reducing gear 21 with the first gear 11 is actively connected. On the other cheek is also a corresponding gear 21 present, by means of a wave 22 connected to the transmission part 20 is driven.

The gears 21 Comb with the gears 11 of the transmission 10 , Thus, upon actuation of the electric gear motor 18 the armchair 1' adjusted.

LIST OF REFERENCE NUMBERS

1

 armchair

2

 seat

3

 frame

4

 leg rest

5

 tubular frame

6

 Wangen

7

 flap

8th

 lever

9

 lever

10

 transmission

11

 gear

12

 gearing

13

 swivel axis

14

 flap

15

 main lever

16

 pole

17

 clasp

18

 Electric gear motor

19

 engine part

20

 transmission part

21

 gear

22

 wave

Claims (10)

Seating furniture ( 1 ) with a seat ( 2 ) and one about a pivot axis ( 13 ) swing-out leg rest ( 4 ), wherein the seating is pivotable between a sitting and lying position, including the seat ( 2 ) against a fixed frame ( 3 ) is displaceable to the rear and the leg rest ( 4 ) so with the seat ( 2 ) is coupled, that they when moving the rear seat ( 2 ) is pivoted, characterized in that the leg rest ( 4 ) a gear ( 11 ) and on the front frame of the seat ( 2 ) a gearing ( 12 ), wherein the toothing (Z) with the gear ( 11 ) for pivoting the legrest about the pivot axis ( 13 ) combs. Seating furniture according to claim 1, characterized in that the toothing ( 12 ) rotatably on the front frame of the seat ( 2 ) is attached Seating furniture according to claim 1 or 2, characterized in that the toothing (Z) is formed in a circular segment. Seating furniture according to one of the preceding claims, characterized in that the toothing is arranged such that when moving the seat back to the gear ( 11 ) of the leg rest ( 4 ) drives. Seating furniture according to one of the preceding claims, characterized in that the gear ( 11 ) rotatably with the pivot axis ( 13 ) of the leg rest ( 4 ), in particular rotationally fixed to the pivot axis ( 13 ) is arranged by itself. Seating furniture according to one of the preceding claims, characterized in that the pivot axis ( 13 ) on the fixed frame ( 3 ) is arranged. Seating furniture according to one of the preceding claims, characterized in that a motor, pneumatic or hydraulic drive ( 18 ) is provided for adjustment. Seating furniture according to claim 7, characterized in that the drive ( 18 ) via a second, in particular reducing, gear ( 21 ) with the first gear ( 11 ) is operatively connected. Seating furniture according to one of the preceding claims, characterized in that the toothing ( 12 ) and the gear ( 11 ) by means of a clasp ( 17 ) are set at a distance to each other. Seating furniture according to one of the preceding claims, characterized in that one independent of the seat ( 2 ) and opposite the seat ( 2 ) pivoting backrest is present.

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