WO2022238135A1

WO2022238135A1 - Seating furniture

Info

Publication number: WO2022238135A1
Application number: PCT/EP2022/061390
Authority: WO
Inventors: Armin Sander
Original assignee: Armin Sander
Priority date: 2021-05-14
Filing date: 2022-04-28
Publication date: 2022-11-17
Also published as: DE202021102630U1

Abstract

The invention relates to an item of seating furniture (2) comprising a seat base (4), a backrest (6) and a foot (8). A flexurally elastic cross-member (18) and a flexurally elastic longitudinal member (30) are connected to the foot (8). The seat base (4), in a front half (26) remote from the backrest (6), is supported by the cross-member (18). The backrest (6), in an upper half (28) remote from the seat base (4), is supported by the longitudinal member (30).

Description

description

seating furniture

The invention relates to seating furniture. The seating furniture includes a seat, a backrest and a foot.

A piece of seating furniture is generally understood to mean a piece of furniture on which at least one user can sit. Basically, this includes chairs, office chairs (both in a version as a swivel chair and as a conference chair) and armchairs (also known as lounge furniture). Such seating furniture usually has a seat and a back rest set at an angle to it, against which the user can lean. The piece of seating furniture stands on a base by means of a foot, the foot comprising, for example, a turnstile with a number of castors or a number of chair legs.

For example, the backrest is completely rigid so that robustness is increased. To increase comfort, however, a rigid support structure on the backrest is covered with foam, which is why the user is not injured when leaning against it. So that there is sufficient support for the user, there is usually a mechanism or at least defined contact points of a mechanism on the back of the user, such as a lumbar support. This is used to provide selective support for the spine and/or back muscles. This means that the chair can also be used over a longer period of time without getting tired.

It is also usually possible by means of the mechanism to incline the backrest in relation to the seat and to adapt it to the current needs. For this point the mechanism usually has several joints and is rigidly attached to the foot of the seat furniture. In other words, the mechanism serves to attach the seat and the backrest to the foot. However, such mechanisms are comparatively heavy, so that the weight of the chair is increased. As a result, repositioning of the seating furniture is made more difficult. The Fierstel development of such mechanisms is comparatively expensive.

The invention is based on the object of specifying a particularly suitable piece of seating furniture, with comfort being advantageously increased and/or weight being reduced.

According to the invention this object is solved by the features of claim 1 ge. Advantageous developments and refinements are the subject of the subclaims.

The seating furniture is, for example, a chair, such as a kitchen chair, a meeting chair, an office chair, a swivel chair, a conference chair, or an armchair, for example. The piece of seating furniture has a seat that is suitable, in particular provided and set up, so that a user, who is also referred to as a user, can sit on it. For example, the seat is rigidly configured and made, for example, from a plastic or wood. Especially before given to a plastic body of the seat with a foam verse hen is hen, which in turn is covered with a fabric, such as a fabric or leather. In an alternative to this, the seat comprises a covering that is suitably stretched, for example on a stretching frame of the seat.

Furthermore, the chair includes a backrest, which serves in particular to stabilize and/or to lean the back of the user who uses the chair and sits on the seat of the chair. The backrest is particularly suitable for this purpose, preferably provided and configured. The backrest is, for example, rigid and made in particular from a plastic or wood. Alternatively, a backrest body of the backrest, for example, from the Is made of plastic, provided with a foam, which in turn is related to a fabric, such as a fabric or leather. In an alternative to this, the backrest comprises a covering which is suitably stretched, for example on a stretching frame of the backrest.

In addition, the piece of seating furniture includes a foot, which serves to stabilize the backrest and the seat surface with respect to the ground. The foot is suitable for this purpose, in particular provided and set up. Expediently, the foot represents the only part of the seating furniture item by means of which the seating furniture item is in contact with the ground. In other words, in the intended state, the foot rests on the ground, whereas the seat surface and the backrest are expediently spaced from the ground. The foot has, for example, a foot frame that stands flat on the ground in the intended state. In this way, stability is increased. As an alternative to this, the foot comprises several legs, in particular chair legs. In a further alternative, the base has a base which has cantilever arms which are arranged in a star shape and at the ends of which a roller is held in each case. This makes it possible to move the seating furniture. The foot cross in turn is suitably fixed at the end of a chair column, suitably at the lower end.

The seating furniture has a front side and a rear side (rear side).

The rear side is in this case defined in particular by means of the backrest, and the line of sight of the user, if he is sitting on the seat furniture as intended, is directed from the rear side to the front side, ie from back to front. The seating furniture also has a lower and an upper side, the lower side facing the ground in particular if the seating furniture is used as intended. The top side is directly above it. Thus, a top-to-bottom direction is perpendicular, and in particular is perpendicular to the front-to-back direction. In other words, the front-to-back direction is horizontal, with an additional condition being that the backrest offsets backwards with respect to the seat bottom located. These directional definitions are used in particular below.

The chair also has a flexurally elastic cross brace and a flexurally elastic longitudinal strut. In other words, the two struts are designed to be resilient, and when acted upon by a force occurring, in particular when the chair is used as intended, they are elastically deformed. For example, the two struts are made of a glass fiber reinforced plastic or at least include glass fibers.

The two struts are connected to the foot and in particular attached to it. In particular, one of the ends of the respective struts is connected to the foot. For example, the two struts, ie the transverse strut and the longitudinal strut, are formed on part of the foot and are therefore at least partially in one piece with the foot. However, at least the connection points of the transverse strut and the longitudinal strut to one another are fixed, so that their position relative to one another, ie their connection points on the foot, is fixed. In an alternative to this, these are also designed to be movable in relation to one another.

The seat is supported on the cross brace in a front half facing away from the backrest. For example, for this purpose the seat is attached to the cross brace or is connected to it by means of a joint or a flexible element. The flexible element is, for example, a rubber band or preferably comprises one. As an alternative to this, the seat is only placed loosely on the cross brace. Because of the support, a direct mechanical contact between the cross brace and the seat surface is realized in particular. In particular, the remaining part of the seat is not supported on the cross brace. In other words, the rear half facing the backrest is detached from the transverse strut and is therefore in particular at a distance from it.

The longitudinal strut is used to support the backrest, and is in a seat surface facing away from the upper half is supported on this. Due to the support, direct mechanical contact between the longitudinal stretching be and the backrest realized. For example, the backrest is attached to the longitudinal strut, so it is rigidly held or movable by means of a La gers. In a further alternative, the backrest is attached to the longitudinal strut by means of a further flexible element which is, for example, a rubber band or, in particular, comprises this. As an alternative to this, the backrest is only loosely leaning against the longitudinal strut, at least in a certain state, in particular when the user is using the chair and is leaning against the backrest. If the user is not using the seating furniture item, ie if the seating furniture item is not loaded, the backrest, for example, is at a distance from the longitudinal strut or is also in contact with it.

Due to the flexible design of the transverse strut and the longitudinal strut, the seat surface and the backrest are at least partially moved in relation to the foot when the user sits down on the chair, with the seat surface and the backrest yielding at least partially resiliently. As a result, comfort is increased for the user. Furthermore, due to the flexible design, the seat and the backrest are at least partially pivoted, namely around the point at which the seat or the backrest is supported on the transverse strut/longitudinal strut. Since the support of the cross brace on the seat is offset forward with respect to the user's center of gravity, which is namely in the rear half in the intended state, the seat in the area of the backrest is moved downwards so that the inclination is comfortable for the user the seat adjusts. Likewise, the backrest is rotated under load in such a way that the lower half facing the seat is rotated away from the seat, so that the user's back is supported by the backrest, which is why comfort is increased. No comparatively weight-intensive mechanism is required for this, which is why the weight of the seating furniture item is reduced. In addition, it is possible in this way to provide a comparatively filigree piece of seating furniture, so that the visual impression is improved. Manufacturing costs are also reduced due to the lack of mechanics. For example, the cross strut is supported on the seat surface in the front third or the front fourth, so that the functionality is further improved. The cross brace is particularly preferably supported on the front edge of the seat surface facing away from the backrest, so that the functioning is optimized. Alternatively or in combination with this, the longitudinal strut is supported in the upper third or upper quarter of the backrest, and for example the upper edge of the backrest facing away from the seat is supported on the longitudinal strut. Thus, functionality is improved. For example, the end of the crossbar facing away from the foot is supported on the seat surface, or the crossbar protrudes beyond the seat surface. Alternatively or in combination with this, in particular the end of the longitudinal strut facing away from the foot is supported on the backrest or protrudes beyond it.

In particular, the support on the backrest or the seat is only at a specific point or at least along an area that is in particular only 10%, 5% or 2% of the extent of the seat from front to back or the extent of the backrest from corresponds to top to bottom. Those areas of the seat surface or the backrest which are not supported on the transverse strut or the longitudinal strut are particularly preferably spaced apart from the respective strut. As a result, a comparatively unhindered pivoting of the backrest and the seat is made possible, so that comfort for a user is increased.

For example, at least one of the struts, for example both struts, ie the transverse strut and the longitudinal strut, is straight in the unloaded state of the chair. However, they are particularly preferably curved and expediently prestressed. Thus, when the seating furniture is subjected to a load due to the user sitting down, the manner in which the transverse strut or longitudinal strut is deformed in a flexible manner is specified, so that uncontrolled pivoting of the seat surface with respect to the backrest is avoided. In this case, the transverse strut is particularly preferably arranged in such a way that the curvature points away from the seat surface. Alternatively or in combination with this, the longitudinal strut is arranged in such a way that the curvature points away from the backrest. To this In this way, the seat surface is at least partially spaced from the backrest when the seating furniture is subjected to a load due to the bending elastic deformation of the transverse strut and the longitudinal strut, so that comfort for the user is further increased.

For example, the transverse strut and the longitudinal strut are not offset forwards or backwards in relation to one another in the area in which they are connected to the foot. In other words, these are tied to the foot at the same height in the front-to-back direction. For example, in this case the transverse strut is connected to the longitudinal strut and, in particular, is formed on this. The two struts are thus expediently realized by means of a common component, which simplifies production.

As an alternative to this, the transverse strut is attached to the foot offset to the rear with respect to the longitudinal strut. Thus, the two struts cross, in particular below the seat. As a result, the lever arms are comparatively large, so that the two struts can be made from a comparatively robust material, with yielding, springy behavior nevertheless being implemented. In this way, the pivoting movements of the seat surface and/or the backrest also have a comparatively large radius under load, so that comfort for the user is further increased.

For example, the backrest and the seat are connected to one another at a holding section. The holding section corresponds, for example, to the lower edge of the backrest and the rear edge of the seat. For example, the backrest and the seat are molded onto each other and, for example, one piece with each other. This further simplifies the manufacture of the seating furniture item. For example, the backrest and the seat have a rigid design and are realized by means of a common shell. Here, the backrest is expediently spaced from the longitudinal strut in the unloaded state and supported single Lich in the loaded state on the longitudinal strut, so that excessive tilting of the shell having the backrest and the seat is avoided under load. Alternatively, a joint is arranged between the backrest and the seat so that the backrest can be pivoted with respect to the seat. Because the backrest is attached to the seat, these are stabilized relative to one another and the user's sense of security is increased. In a further development, the backrest and the seat are at least partially created by means of a covering, the holding section preferably forming at least part of a holding frame, by means of which the covering is stretched or at least held. As a result, comfort is further increased.

For example, the holding section is spaced apart from the two struts, so that the seat surface and the backrest can be moved comparatively freely with respect to the foot. As a result, it is possible to adjust the chair comparatively precisely to the needs of the user. Particularly preferably, however, the holding section is movably held on the longitudinal strut. This results in an additional stabilization of the backrest and the seat, and a degree of freedom of movement is at least partially restricted. As a result, an uncontrolled pivoting of the backrest and the seat to each other is avoided, especially for an inexperienced user.

For example, the holding section is designed as a joint and this is fastened to the longitudinal strut, for example by means of a flexible element. In particular, the limp element is an at least partially elastic rubber band, or at least includes this. As an alternative to this, the backrest and the seat are created, for example, by means of a common covering, which has, for example, two openings that are placed one on top of the other, so that the covering has a loop. The longitudinal strut is passed through the openings arranged one above the other. In this way, a comparatively cost-effective movable mount is realized.

In an alternative to this, the holding section includes a bracket, and the backrest and the seat are expediently also created by means of a common covering. On the inside of the bracket there is a practical It is advisable to attach the longitudinal brace so that the bracket can be moved with respect to the longitudinal brace. The fabric is expediently guided through the bracket, and the edge at which the seat surface merges into the back rest is defined by means of the bracket. Here it is suitably also possible to move the bracket along the covering, so that the size of the backrest and the seat can be changed.

In an alternative to this, for example, the backrest and the seat are movable relative to one another and are each rigid, for example. Appropriately, the backrest is attached to the cross brace and the seat surface is attached to the cross brace. Thus, when the seat furniture is loaded, the chair rotates or twists in the area where the backrest is attached to the longitudinal strut and the seat surface to the transverse strut, with the backrest and the seat surface not being deformed. Thus, support for the user is further increased. The backrest and the seat are particularly preferably spaced apart from one another, so that they can be moved independently of each other. As a result, the inclination of the backrest can be adjusted independently of the seat surface, for example by the user himself by changing the load on the chair. It is also directly possible during production to choose the elasticity of the two struts or the connection points on the backrest or the seat surface independently of one another.

For example, the backrest and the seat are spaced apart from one another and are therefore only attached to one another via the struts and the foot. Thus, a comparatively free movement of the backrest and the seat surface and thus an independent adjustment of these is made possible. As an alternative to this, the back rest and the seat surface are only connected to one another in the region of the holding section, so that a comparatively free movement of these relative to one another is also made possible.

In an alternative to this, the piece of seating furniture comprises a frame which is at least partially O-shaped. In particular, the ends facing away from the foot Longitudinal strut and the cross strut connected to each other by means of the O-shaped part of the frame. In other words, the end of the longitudinal strut facing away from the foot is connected to the end of the transverse strut facing away from the foot by means of the frame. Suitably the frame, or at least the O-shaped part thereof, is rigid. Because of the frame, stability is thus further increased, and overloading of the transverse strut and the longitudinal strut is avoided. In other words, the two struts are at least partially stabilized relative to one another by means of the frame, so that overloading of one of the struts, which could lead to it breaking, is avoided.

In particular, the O-shaped part of the frame is arranged in such a way that the user is at least partially within the opening of the O-shaped part of the frame when sitting on the chair. For this purpose, the frame expediently has at least one partially straight edge, which is arranged in particular parallel to the front edge of the seat surface and rests against it, for example. Alternatively or in combination with this, the frame comprises a further straight edge, which is arranged parallel to the upper edge of the backrest and, for example, abuts against it. The frame expediently includes two additional edges, so that the O-shaped part of the frame is essentially rectangular. The two additional edges essentially run at an angle to the horizontal and to the vertical. For example, the additional edges are straight or slightly curved.

In an alternative to this, the seat surface in the front half and the backrest in the upper half are fastened to one another by means of the O-shaped frame, and the two struts are connected to one another via the seat surface and the backrest by means of the frame. In other words, the struts are spaced from the O-shaped frame and are only in contact with it via the seat bottom and backrest. In an alternative to this, at least one of the two struts is directly connected to the frame, whereas the remaining is indirectly connected to the backrest or the seat at this is.

For example, the frame has only the O-shaped part and is formed by means of it. However, the frame particularly preferably comprises an armrest, expediently two armrests, which further increases comfort. The O-shaped part of the frame, for example, is suitably shaped for this purpose, in particular in the area of the additional edges. Alternatively, a shelf is attached to the O-shaped part, so that a haptic impression is further improved. For example, the tray mimics or overhangs the shape of the additional edge at least in the area of the attachment. In a further alternative, the two armrests are held on the O-shaped part of the frame and attached to one another by means of a further backrest, by means of which there is additional support for the back, in particular when the user is suitably arranged on the seat. Thus, comfort is further increased. The wide re backrest is expediently spaced from the backrest so that they can be moved independently. Alternatively, these are attached to each other, for example by means of a joint, which is or comprises a flexible element, for example. In another alternative, the armrests are attached directly to the backrest.

For example, only the single cross brace is present, by means of which the seat is supported. Particularly preferably, the piece of seating furniture comprises at least one second transverse strut, which is also connected to the foot and by means of which the seat surface is supported in the front half facing away from the backrest. Thus, the force caused by a load is divided between the two cross braces. Consequently, it is possible to use comparatively filigree cross braces in each case, with overloading of these nevertheless being avoided.

For example, the two transverse struts are arranged parallel to one another, and in particular the piece of seating furniture comprises a plurality of such second transverse struts. So with a robustness is further increased, each of the cross braces comparatively can be designed delicately. In particular, the cross braces are identical in construction to one another. Alternatively, the second cross brace is connected to the base and the cross brace at a common point. For example, the two crossbars are molded onto one another at this point or at least attached to one another. The seat surface, on the other hand, is expediently supported on the second cross brace in the front half facing away from the backrest in a region spaced apart from the cross brace. The seat surface is expediently supported at the same distance between the front and rear sides, so that the seat surface is prevented from tipping at an angle. Thus, the combination of the two cross braces is at least partially V-shaped. For example, the two crossbars are constructed in one piece with one another or are mirror images of one another.

For example, the seating furniture includes only the single longitudinal strut. However, the piece of seating furniture particularly preferably comprises at least one second longitudinal strut or a plurality of such second longitudinal struts. The second longitudinal strut is arranged parallel to the longitudinal strut, for example. However, at least the second longitudinal strut or all longitudinal struts are connected to the foot, and the backrest is supported on all longitudinal struts on the upper half facing away from the seat.

For example, the two longitudinal struts are connected to the foot at a common point, but are supported on the backrest in different areas of the latter. Particularly preferably, however, the second longitudinal strut is connected to the foot in a region spaced apart from the longitudinal strut, and the ends of the two longitudinal struts facing away from the foot are fastened to one another. Thus, the combination of the two longitudinal struts is at least partially V-shaped. Because of this, injury to the user due to the ends of the longitudinal struts protruding when the chair is adjusted is avoided.

The two longitudinal struts are also stabilized relative to one another, which increases robustness. For example, the two longitudinal struts are attached to one another or are molded onto one another and are therefore integral with one another. The two longitudinal struts are expediently arranged at the same distance from the rear end of the seat, ie in particular at the same height in relation to the direction from front to back, so that the backrest is prevented from tilting at an angle. As an alternative to this, the connection points on the foot are offset from one another in this direction.

Exemplary embodiments of the invention are explained in more detail below with reference to a drawing. Show in it:

Fig. 1, 2 in perspective a piece of seating furniture,

Fig. 3 - 7 perspectively different embodiments of the chair,

8, 9 another embodiment of the chair in different perspective views,

Fig. 10 - 14 perspective further embodiments of the chair, and

Fig. 15 - 17 basic sketches of different embodiments of the chair. Corresponding parts are provided with the same reference symbols in all figures.

In FIG. 1 and FIG. 2, a piece of seating furniture 2 in the form of an armchair is shown from different perspectives. The piece of seating furniture 2 has a seat surface 4 and a backrest 6, each of which is rigid. It is possible that the seat 4 and the backrest 6 each have a rigid body that is padded with foam. The foam in turn is provided with a cover made of fabric or leather. the Seat 4 is suitable for a user to sit on. If this is the case, it is possible that the user leans his back against the backrest 6 . The chair 2 also has a foot 8, which is used for contact with a non-illustrated subsurface. For this purpose, the foot 8 has a foot frame 10 which stands flat on the ground. On the base frame 10, a base plate 14 is held by a flexible spring strut 12, the kalrichtung in the Verti 16, which is perpendicular, above the base frame 10 are located. With regard to the other dimensions, the base plate 14 is arranged inside the base frame scenes. Due to the bending elasticity of the spring strut 12, when a force is exerted on the base plate 14 in the vertical direction 16, this frame 10 is deflected relative to the base. If the exertion of force is terminated, this moves again to the original position.

In an alternative, the foot 8 is made from one piece and is therefore in one piece, with the resilient configuration of the spring strut 12 being realized, for example, by means of geometric adaptation. As an alternative to this, the spring strut 12 consists of a material that differs from the base frame 10 . The foot 8 is preferably made of a metal or a glass fiber reinforced plastic.

The seat 4 is net angeord in the vertical direction 16 above the base plate 14 and connected to it by means of a cross brace 18 and a second cross brace 20 . The seat 4 is thus supported on the two cross braces 18 , 20 . The two arcuate transverse struts 18, 20 are attached to the base plate 14 with one of their respective ends at a common point 22 at which they merge into one another. The remaining ends of the two crossbars 18, 20, on the other hand, which are supported on the seat surface 4, are spaced apart from one another, so that the seat surface 4 is supported on the crossbar 18 and on the second crossbar 20 in areas that are spaced apart from one another. As a result, the combination of the two cross braces 18,20 is essentially V-shaped. In addition, the two transverse struts 18, 20 bent, with the curvature of the transverse struts 18, 20 pointing downwards, i.e. in the vertical direction 16 to the foot 8.

The two transverse struts 18, 20 are attached to the foot 8 opposite ends, which are supported on the seat 4, on a front edge 24 or at least in the region of the front edge 24 on the seat 4. The front edge 24 delimits the seat surface 4 on the side opposite the backrest 6 in the horizontal direction. Thus, the seat surface 4 is supported in a front half 26 facing away from the backrest 6 on the cross strut 18 and in a region spaced apart from the cross strut 18 on the second cross strut 20 in the front half 26 . The rest of the area of the seat 4 is not supported on the foot 8 . The cross braces 18, 20 are flexibly elastic ausgestal tet and made of a glass fiber reinforced plastic. The backrest 6 is supported in an upper half 28 facing away from the seat 4 on a longitudinal strut 30 and a second longitudinal strut 32 which project beyond this in the vertical direction 16 and thus project upwards over the backrest 6 . In this area, the two longitudinal struts 30, 32 are formed together. The remaining ends of the arcuate longitudinal struts 30, 32, which are mirror images of one another, are in spaced-apart areas on the

Footplate 14 and thus connected to the foot 8, namely attached. In summary, the second longitudinal strut 32 is connected to the foot 8 in a beabstan deten area of the longitudinal strut 30, and the ends of the two longitudinal struts 30, 32 facing away from the foot 8 are fastened to one another. The two longitudinal struts 30, 32 are arranged in such a way that the curvature is directed away from the seat surface 6. In addition, the backrest 6 is supported on the two longitudinal struts 30, 32 in the upper half 28 facing away from the seat surface 4, namely on the upper edge 34 facing away from this. The longitudinal struts 30, 32 are each Weil flexible and created from a glass fiber reinforced plastic.

The connection points of the longitudinal struts 30, 32 on the foot plate 14 are offset forward with respect to the connection points of the transverse struts 18, 20 on the foot plate 14, ie in the direction of the front edge 24. Included the connection points of the transverse struts 18, 20 are located on the foot plate 14 in the vertical direction 16 essentially below the backrest 6, whereas the connection points of the longitudinal struts 30, 32 are located essentially centrally below half of the seat 4. In summary, the transverse strut 18 is attached to the foot 8 offset rearwardly with respect to the longitudinal strut 30, and the longitudinal struts 30, 32 and the transverse struts 18, 20 therefore intersect.

In the lower half facing the seat 4, the backrest 6 is completely spaced apart from all longitudinal struts 30, 32 and all transverse struts 18, 20 and is free from other components of the seating furniture item 2. The seat 4 is also in the half facing the backrest 6 from the transverse struts 18, 20 and the longitudinal struts 30, 32 spaced. Furthermore, the backrest 6 and the seat 4 are spaced apart and are movable relative to one another due to the flexibly elastic configuration of the longitudinal struts 30, 32 and the transverse struts 18,20.

The chair 2 also includes an O-shaped frame 36 which is substantially rectangular in shape. The frame 36 is rigidly formed in this example in one piece from a plastic. The frame 36 has an edge 38 and, opposite this, a further edge 40, which are connected to one another at the ends via two additional edges 42 running parallel to one another. The edge 38 and the other edge 40 are designed straight and arranged in the hori zontal. The additional edge 42 are curved and arranged obliquely to the vertical direction 16 Ver. The edge 38 is fastened in the region of the front edge 24 to the seat surface 4 and to one of the ends of the transverse struts 18, 20. The further edge 40 is fastened to the backrest 6 in the upper half 28 and, via this, to the ends of the longitudinal struts 30 facing away from the foot 8,

32. If a user sits down on the chair 2 as intended and thus uses it, the front edge 24 is in the direction of the back of the user's knees or touches them. As a result, the user's center of gravity is offset towards the backrest 6 with respect to the front edge 24, so that, on the one hand, the seat surface 4 is at least partially bent or at least twisted in the area of the connection to the cross braces 18, 20. In addition, the cross braces 18, 20 yield at least partially resiliently, which is why the backrest 6 is moved in the direction of the user's back due to the rigid frame 36. As a result, it is easier for the user to lean against it. On the other hand, if the user leans comparatively far back and against the backrest 6, the two longitudinal struts 30, 32 give way in a partially resilient manner, so that the backrest 6 is tilted and moved backwards. As a result, due to the frame 36, the transverse struts 18, 20 are at least partially relieved and the seat surface 4 is partially raised, so that a pleasant and comfortable seating position is realized for the user. It is also possible to adjust the backrest 6 independently of the seat surface 4 by means of a corresponding positioning of the back, namely by the user exerting a corresponding pressure on it. A comparatively high level of comfort is thus achieved for the user.

In Figure 3, a modification of the chair 2 is shown in perspective. The ends of the longitudinal struts 30, 32 facing away from the foot 8 are directly connected to the frame 36, namely to the further edge 40, and the longitudinal struts 30, 32 do not protrude beyond the backrest 6 in the vertical direction 16. Also, the additional edges 42 are now no longer completely bent, but instead have a kink, to which a shelf 44 is attached in each case. The trays 44 are made of plastic or wood and are essentially V-shaped. Two armrests 45 are realized by means of the shelves 44 and the corresponding shaping of the additional edge 42 , so that the frame 36 has the two armrests 45 . The seat 4 and the foot as well as the two crossbars 18, 20, on the other hand, are not modified in this embodiment.

In a variant that is not shown in detail, the seat surface 4 is connected to the backrest 6 by means of an elastic connection. Also in this case the edge 40 is connected to the backrest 6 and the seat 4 to the additional edges 42 with means of a respective elastic connection. In addition, the arm Lean 45, in particular the additional edges 42, and / or the Verbindungsbe areas of the shelves 44 at the additional edges 42 designed to be flexible.

FIG. 4 shows a further embodiment of the piece of seating furniture 2, the foot 8 only having the now butterfly-shaped foot plate 14, at the ends of which rollers 46 are held. Again, the seat surface 4 and the backrest 6 are present, the seat surface 4 being curved upwards on the side facing the backrest 6 . The size of the Rückenleh ne 6 is reduced, but this over the longitudinal struts 30, 32 in the vertical direction 16 is. The two cross braces 18, 20 are again present and attached to the edge 38 of the frame 36. Also, the longitudinal struts 30,

32 attached to the additional edge 40 at the end remote from the foot 8, which are now spaced apart. The additional edges 42 are now configured straight and are made of a different material than the edge 38 and the further edge 40 .

There are again the two armrests 45 available, but these are formed by means of a horizontally arranged board 48, the talrichtung perpendicular to the Horizon 16 is U-shaped. The two free ends of the board 48 are attached to the additional edges 42. The transverse leg of the U-shape also has an increased extent in the horizontal direction 16, so that the back of the user can be supported in this way.

A modification of the previous variant is shown in FIG. In comparison to this, the backrest 6 does not project beyond the frame 36 in the vertical direction 16, and the two board-shaped armrests 45 are formed on the backrest 6 and are fastened to the additional edges 42 at the ends. In other words, the backrest 6 is in one piece with the board 48 of the previous embodiment. However, the connection of the transverse struts 18, 20 and the longitudinal struts 30, 32 to the base plate 14 and their arrangement relative to one another is not changed. A further alternative of the piece of seating furniture 2 is shown in FIG. The base 8 in turn has only the base plate 14 to which the transverse struts 18, 20 and the longitudinal struts 30, 32 are connected. The longitudinal struts 30, 32 are also connected to one another at the end opposite the foot 8, corresponding to the variant shown in FIG. 1 and FIG. In addition, the transverse struts 18, 20 and longitudinal struts 30, 32 are bent accordingly. The frame 36 hinge gene is not available. The seat surface 4 and the backrest 6 are molded onto one another at a holding section 50 so that a shell 52 is formed. The shell 52 is made in one piece from a plastic, and the holding portion 50 is formed by means of the front edge 24 opposite edge of the seat 4 and the upper edge 34 opposite edge of the backrest 26 ge.

The seat surface 4 is in turn fastened to the two transverse struts 18, 20 via the front edge 24 and is thus directly supported on them. The back rest 6, on the other hand, is in the unloaded state, ie when no user is sitting on the seat surface 4, of the two longitudinal struts 30, 32 at a distance. If the user then sits against the seat surface 4 and leans against the backrest 6, the shell 52 is at least partially tilted. As a result, the backrest 6 comes into contact with the two longitudinal struts 30, 32 and is thus supported by them. Therefore, the tilting movement of the shell 52 is limited, and this is done due to the flexible design of the longitudinal struts 30, 32 fe-promoting. The inclination of the seat surface 4 with respect to the backrest 6, on the other hand, is not changed due to the rigid configuration of the shell 52.

FIG. 7 shows a further alternative of the piece of seating furniture 2, with the foot 8 essentially corresponding to the variant shown in FIG. 5, but with the rollers 46 not being present. The frame 36 and the longitudinal struts 30, 32 and the transverse struts 18, 20 and their arrangement relative to one another and to the base plate 14 and to the frame 36 are not changed in comparison to the variant shown in FIG. The backrest 6 is in turn connected to the seat surface 4 via the holding section 50 , the seat surface 4 being movable with respect to the backrest 6 .

In other words, the holding section 50 is designed in the manner of a joint. The seat 4 is in the region of the front edge 24, ie in the front half 26, at the edge 38 of the frame 36 by means of a plurality of rubber bands 54 is connected. The backrest 6 is also connected to the other edge 40 in the upper half 28 by means of additional rubber bands 56 . It is thus possible to move the seat 4 and the backrest 6 in relation to the frame 36 and to each other, this being partly done at least elastically. The functioning of the transverse struts 18, 20 and the longitudinal struts 30, 32 is in accordance with the previous embodiment.

In Figure 8 and in Figure 9, a further embodiment of the chair 2 is shown from different perspectives. The piece of seating furniture 2 in turn has the seat surface 4 and the backrest 6 which are connected to one another at the holding section 50 . The seat surface 4 and the backrest 6 are each made up of three webs 58 which are arranged parallel to one another and are at least partially attached to one another. The two outer panels 58 begin at the top edge 34 and by means of one of these the cross brace 18 and with the remaining the second cross brace 20 is formed. A part of the foot 8 is also formed by means of the two outer webs 58 . For this purpose, each of the webs 58 is correspondingly bent.

The central web 58 , on the other hand, begins at the front edge 24 and merges into the backrest 6 via a kink at the holding section 50 . This web 58 is folded over at the upper edge 34 and forms the longitudinal strut 30. This web 58 is folded over again at the lower end of the longitudinal strut 30, so that part of the foot 8 is formed. The front edge 24, the upper edge 34 and the holding section 58 are stabilized by means of rods which are not shown in detail and which run along the respective edge 24, 34 and the holding section 50, respectively. The front and rear parts of the foot 8 are also at least partially stabilized by means of appropriate rods. the train NEN 58 are in one piece and created from a glass fiber reinforced plastic.

In this embodiment, too, due to the bending elasticity of the transverse struts 18, 20 and the longitudinal strut 30 and the mobility of the holding section 50, the seat surface 4 and the backrest 6 are adapted to the user, with the webs 58 in the area of the seat surface 4, in the area the backrest 6 and are reinforced in the area of the foot, so that the bending elasticity is reduced there.

In a variant that is not shown in detail, the piece of seating furniture 2 has only two such webs 58, with the longitudinal strut 30 being formed by means of one of the webs 58 and the transverse strut 18 being formed with the other. The second cross brace 20 against is not available. In another alternative, there are several tracks 58 of this type, so that, for example, the second longitudinal strut 32 or other longitudinal struts and/or transverse struts are present.

FIG. 10 shows a detail of a further embodiment of the chair 2 in a perspective rear view. The foot 8 has a chair column 60, at the upper end of which a fastening section 62 is formed. The two transverse struts 18 , 20 and the two longitudinal struts 30 , 32 are fastened to the fastening section 62 . The transverse struts 18, 20 are offset neither forwards nor backwards with respect to the longitudinal struts 30, 32. The Längsstre ben 30, 32 are attached to the ends of the upper edge 34, which is realized by means of a hori zontally aligned rod. The two longitudinal struts 30, 32 are associated with opposite ends of the rod. The two transverse struts 18, 20 are also connected at one end to the front edge 24, which is also formed by means of a corresponding horizontally aligned rod. The two crossbars 18, 20 are attached to opposite ends of the rod. The seat surface 4 and the backrest 6 are formed by means of a common covering 64 designed as a net, which is attached to the front edge 24 and the upper edge 34 . The holding portion 50 is partially formed by means of corre sponding rods by means of a limp element 66 on the Attachment portion 62 is attached. The rod of the holding portion 50 acts as a joint, which is movably due to the flexible element 66 at the fastening supply portion 62 is held. When the seating furniture 2 is loaded, it is possible for the holding section 50 to move in relation to the fastening section 62 due to the limp element 66, with the proportion of the covering 64 assigned to the backrest 6 or the seat surface 4 changing. Thus, these are adapted to the needs of the user, which is done by the user himself due to a shift in weight.

In the further variant of the chair 2 shown in FIG. 11, the holding section 50 is formed only by means of the covering 64 and the chair 2 has a bracket 68 through which the covering 64 is guided. Thus, the holding portion 50 is at least partially formed by means of one of the sides of the O-shaped Bü gels 68. The two longitudinal struts 30, 32 are also guided by the bracket 68, so that the bracket 68 and therefore also the holding section 50 are movably held on the longitudinal strut 30 and the second longitudinal strut 32. The bracket 68 takes over the function of the limp element 66 of the previous embodiment.

A modification of this is shown in FIG. The chair 2 in turn has the covering 64, by means of which both the backrest 6 and the seat 4 are formed, which is fixed to the respective edges 24, 34, which are widened compared to the previous embodiment. At the two Kar th 24, 34, the respective struts 18, 20, 30, 32 are formed, which are connected to a ge ometrically modified attachment portion 62 which is attached to the chair column 60. In addition, the holding section 50 is defined by a slide 70 that can be displaced along the covering 64 and is held in a foldable or pivotable manner in a corresponding U-shaped receptacle 72 of the longitudinal strut 30 and the second longitudinal strut 32 . In an alternative, the retainer 72 is flexible and/or stretchable. Preferably for this purpose the measure 72 is created from an elastic plastic. A further modification is shown in FIG. 13, in which the foot 8 is formed by means of the foot frame 10, which is triangular in shape. The cross braces 18, 20 arranged in the V-shape and the two longitudinal braces 30, 32 arranged in a V-shape are in turn attached to this, the cross braces 18, 20 being offset to the rear with respect to the longitudinal braces 30, 32 and connected to the foot 8 .

The seat surface 4 and the backrest 6 are in turn formed by means of the covering 64, which has a loop 74 in the region of the holding section 50, ie is placed on itself. In addition, the covering 64 has four openings 76 in the region of the loop 74, two of which are arranged one above the other. Through one of the pairs of openings 76 formed in this way, the longitudinal strut 30 and through the other pair, the second longitudinal strut 32 is guided. Thus, the loop 74 and therefore in turn also the holding section 50 is movably mounted on the two longitudinal struts 30, 32. The loop 74 is, for example, designed to be flexible and suitably elastic. In an alternative, the loop 74 is made of rubber.

FIG. 14 shows a modification of the piece of seating furniture 2 shown in FIG. The foot frame 10 is designed around, and a total of six cross braces 18, 20 are connected to this, which are arranged parallel to each other. Furthermore, a total of seven longitudinal struts 30, 32 are taken on the foot frame 10 fasten. The arrangement corresponds - with the exception of the respective parallel arrangement - the arrangement of the previous embodiment. The covering 64 also has the loop 74 in the region of the holding section 50, which has a number of openings 76 that corresponds to the number of longitudinal struts 30, namely exactly twice that number. One of the longitudinal struts 70 is guided through two openings 76 placed one above the other. There are also two armrests 45 which are attached to a U-shaped holder 78 which is passed underneath the seat surface 4 and above the crossing points of the transverse struts 18 with the longitudinal struts 30 .

In the figures 15-17 basic sketches of the chair 2 are each shown in a schematic side view again, with the (functional) principles are at least partially already realized men in the previously described Ausführungsfor.

In the variant shown in FIG. 15, the cross brace 18 is fastened to the seat surface 4 by means of a flexible element, namely the rubber band 54 . The ver remaining end of the seat 4 is movably held on the longitudinal strut 30 via the limp element 66, which can also be configured as a rubber band. The backrest 6 is also fastened to the longitudinal strut 30 by means of the additional rubber band 56 . In addition, in this variant, the backrest 6 and the seat surface 4 are connected to one another by means of the holding section 50, the holding section 50 also being formed by means of a rubber band. In addition, the holding section 50 is movably held on the longitudinal strut 30 . Preferably, the chair 2 has two such transverse struts 18 and two such longitudinal struts 30 which are parallel to one another.

When the user sits down on the piece of seating furniture 2, the holding section 50, the rubber bands 54, 56 and the flexible element 66 are partially stretched or at least elastically deformed. In addition, there is an elastic bending of the cross strut 30 and the longitudinal strut 30, which are stretched, so their curvature increases.

A modification of the functional principle of the chair 2 is shown in FIG.

In this case, the seat surface 4 is held directly on the transverse strut 18, and the backrest 6 is also held directly on the longitudinal strut 30, these being for example rigidly attached thereto or pivotally mounted thereon. There is also the frame 36 which has the two additional edges 42, one of which is shown. These each have two sections 80 which are connected to one another by means of a connecting cross 82 . An auxiliary strut 84 is also connected to the connecting cross 32 and is movably mounted on the longitudinal strut 30 . The connecting cross 82 is designed in a star shape and is adjustable, so that the distance between the two subsections 80 and the auxiliary strut 84 can be adjusted. As a result, it is possible by adjusting the connecting cross 82 the distance between the front Edge 24 to change from the upper edge 34 so that the frame 36, the cross member 18 and the longitudinal strut 30 can be biased. It is also possible in this way to vary the distance between the holding section 50 and the longitudinal strut 30, namely by adjusting the accommodation of the auxiliary struts 84 on the connecting cross 82. Thus, the connecting cross 82 is used to set the force, by means of which the user who is sitting on the seating furniture 2 is supported.

In the variant of the seat 2 shown in Figure 17, the functional principles explained in the two previous figures are implemented, i.e. the flexible connection of the seat surface 4 to the backrest 6 and to the cross brace 18 and the longitudinal brace 30 by means of the holding section 50, the rubber bands 54, 56 and the limp element 66. The frame 86 with the two connecting crosses 82 is also present, by means of which the two sections 80 of each additional edge 42 and the auxiliary struts 84 can be stabilized relative to one another and the distance between them can be adjusted.

The invention is not limited to the exemplary embodiments described above. On the contrary, other variants of the invention can also be derived from this by a person skilled in the art without leaving the subject matter of the invention. In particular, all of the individual features described in connection with the individual exemplary embodiments can also be combined with one another in other ways without departing from the subject matter of the invention.

Reference List

2 seating furniture

4 Seat 6 Backrest

8 feet

10 foot frame

12 spring brace

14 footplate 16 vertical direction

18 crossbar

20 second crossbar 22 common point 24 front edge 26 front half

28 upper half

30 longitudinal brace

32 second longitudinal strut 34 upper edge 36 frame

38 edge

40 more edge

42 additional edge 44 shelf 45 armrest

46 roll

48 board

50 holding section

52 shell 54 elastic band

56 another rubber band 58 web

60 chair column Fastening section Covering Flexible element Bracket Slider Recording Loop Opening Holder Partial section Connecting cross Auxiliary strut

Claims

Seating furniture (2) with a seat (4), a backrest (6) and a foot (8) to which a flexible transverse strut (18) and a flexible longitudinal strut (30) are attached, the seat (4) in a the front half (26) facing away from the backrest (6) is supported on the transverse strut (18), and the backrest (6) is supported on the longitudinal strut (30) in an upper half (28) facing the seat surface (4). Seating furniture (2) according to Claim 1, characterized in that the transverse strut (18) is connected to the foot (8) and is offset to the rear with respect to the longitudinal strut (30). Seating furniture (2) according to Claim 1 or 2, characterized in that the backrest (6) and the seat surface (4) are connected to one another at a holding section (50). Seating furniture (2) according to Claim 3, characterized in that the holding section (50) is movably held on the longitudinal strut (30). Seating furniture (2) according to Claim 1 or 2, characterized in that the backrest (6) and the seat surface (4) are each rigid and can be moved relative to one another. Seating furniture (2) according to one of Claims 1 to 5, characterized in that the ends of the longitudinal strut (30) and the transverse strut (18) facing away from the foot (8) are connected to one another by means of an at least partially O-shaped frame (36). Seating furniture (2) according to Claim 6, characterized in that the frame (36) has an armrest (46). Seating furniture (2) according to one of Claims 1 to 7, characterized by a second transverse strut (20) which is connected to the foot (8) and the transverse strut (18) at a common point (22), the seat surface (4) is supported in the front half (26) facing away from the backrest (6) in a region spaced apart from the crossbar (18) on the second crossbar (20). Seating furniture (2) according to one of Claims 1 to 8, characterized by a second longitudinal strut (32) which is connected to the foot (8) in a region spaced apart from the longitudinal strut (30), the foot (8) facing away Ends of the two longitudinal struts (30, 32) are attached to one another.