EP2582267B1 - Chair - Google Patents

Description

The invention relates to a chair which comprises a continuous support element, a movement mechanism and a frame.

From the DE 1 282 262 A1 a chair with a continuous support element is known, which is designed as a seat shell, wherein the back region of the seat shell is supported in a lumbar region by a centrally arranged double tube.

From the EP 0 049 310 B1 is a chair with a continuous support element known, the back region is supported by laterally arranged next to the support arm and cushioned.

From the EP 1 946 676 A1 is a chair with a continuous support known, which is designed as a seat, wherein the back region is supported and cushioned by two laterally and symmetrically arranged support arms in a lumbar region.

From the EP 2 110 050 A1 For example, there is known a chair which has a continuous support comprising two L-shaped support beams carrying a fabric, the support being supported in a transitional region and a back region by a rigid back element integrated into the support.

From the EP2100539 A1 Another chair according to the preamble of claim 1 is known.

It is an object of the invention to develop a chair with a continuous, lightweight support element, which has increased comfort and a lightweight construction.

This object is achieved on the basis of the features of the preamble of claim 1 by the characterizing features of claim 1. In the dependent claims advantageous and expedient developments are given.

In the chair according to the invention, the movement mechanism comprises a torsion element, which carries the back part and controls the inclination of the back part, wherein the back part of the support element is connected exclusively above the lumbar support with the torsion element. Due to the support of the back region of the support element via a torsion element and the articulation of the back region of the support element in an upper half of the back region to the torsion element, a lower intrinsic stability of the back region of the support element is required since it is supported and stabilized in its upper back region by the torsion element. This is particularly of great advantage, since the torsional forces are initiated by the user exactly in this upper back area in particular on the shoulder blades when the user sitting on the chair bends to the right or left behind, for example, to grab a standing behind him folder , Due to the local proximity between the force application points in the region of the shoulder blades of the seated on the support member of the user and the one or more articulation points of the torsion in the upper half of the back region of the support means a stress build-up in the back element is largely avoided, so that it can be designed as a lightweight component , By this lightweight, which allows the special arrangement and connection of the torsion, it is also possible, the required relative movement, which occurs in a change in the load of the chair by the seated user, by an elastic deformation of the support element between Back area and seating area to ensure without having to take expensive technical measures.

According to the invention, in the chair, the back region relative to the seating area can be tilted and / or twisted from an upright sitting position into a reclined seating position, wherein a force introduced by a seated person into the support element, which is a bending of the support element and / or a rotation of the back part opposite causes the seat part, by the movement mechanism experiences a counter force, wherein the movement mechanism is connected to the support member in the back above a lumbar support in particular in a central pivot point or in particular in two lateral articulation points and wherein the movement mechanism with the support member in the seating area, in particular firmly connected or is connected in particular via two arranged in the seating area axes of rotation. By such a connection of the support member, which carries the seated people, to the movement mechanics of the requirement to allow the seated people when sitting upright and reclined seats a torso rotation, are optimally met. The chair can optimally follow with its back part of the torso rotation, since the movement mechanism is similar to the human spine in the transitional part and in the lower half of the back part designed as a rotatable and lying in the plane of symmetry structure.

The invention also provides for equipping the torsion element with a torsion bar which extends upwards beyond the lumbar support into a symmetry plane of the chair which is perpendicular in space. As a result, the torsion bar is optimally aligned to asymmetrical loads on the back region of the support element, which can be generated by a rotation of the upper body of a person sitting on the chair.

According to the invention, the elastic deformation of the supporting element between the back region and the seating area in particular achieved by a waiver of a connection of the support element to the movement mechanism in a lower back region and in a transition region.

According to the invention, the support element according to a first embodiment variant comprises two L-shaped bent support beams and a fabric, wherein the fabric is stretched between the support beams. Such a construction leads in a simple manner to a lightweight construction of the support element.

The invention also provides to arrange the movement mechanism between the frame and the support element, wherein the movement mechanism carries both the back of the support member and the seat part of the support member, wherein by the movement mechanism, an inclination of the seat part and an inclination of the back part in response to the forces with which a seated person acts on the chair is controlled, wherein the inclination of the seat part and the inclination of the back part dependent on each other are controlled and wherein the inclination of the back part between an initial position and an end position increases more than the inclination of the seat part. By such a movement mechanism, a particularly high level of comfort is achieved.

According to a further embodiment, the invention provides to form the support element as a L-shaped curved seat shell. Such a trained seat is manufacturing technology special easy example, as a one-piece injection molded part produced.

The invention provides, in a simple embodiment variant, to rigidly fix the support element in its seating area to the frame and merely to support a cantilever arm, which comprises the transition area and the back area of the support element, by the torsion bar. Such a chair has a high degree of comfort a special simple movement mechanics and is therefore easy to manufacture and therefore inexpensive.

Furthermore, the invention provides for a parallel course of the two axes of rotation arranged in the seating area, the axes of rotation penetrating orthogonally through a plane of symmetry of the chair which is perpendicular in space. Due to the mounting of the seat part on the rotary axes, the seat part is stabilized by the movement mechanism and the movement profile of the seat part is defined.

According to the invention, the counterforce, which is generated by the movement mechanism for compensating for the force introduced by a seated person, amounts to at least 50% and in particular at least 70% of a required total counterforce, the remaining counterforce being generated by the deforming support element. As a result, the support element is greatly relieved and can be designed accordingly lightweight and flexible.

Furthermore, the invention provides to arrange the movement mechanism between the frame and the support element, wherein the movement mechanism comprises a first rocker, a second rocker and a base body, wherein the second rocker is pivotally connected to the base body and rotatably articulated to a front half of the seat part, wherein the first rocker is rotatably hinged to the body, is pivotally hinged to a rear half of the seat and includes the torsion member which is connected to the back region above a lumbar support. By such articulation and a mirror-symmetrical and rigid design of the two wings to the plane of symmetry, the tilt behavior and the torsional behavior of the chair can be realized with a few components.

Alternatively, the invention also provides for a movement mechanism arranged between the frame and the support element to be equipped with a support element which is in particular elastically deformable, the support element being arranged between the frame and the seat part and fixing the seat part and the movement mechanism being elastically deformable Swingarm includes, which the torsion element includes and is connected to the frame and with the back area above a lumbar support. By such a design of the chair, the chair on without the articulated with swivel joints movement the desired inclination behavior and the desired torsional behavior.

According to the invention, the support element also comprises two spacer rods, wherein the two support beams are held by the two spacer rods, which connect free ends of the support beams, in a predefined distance, as well as by the movement mechanism, are kept parallel to each other in this defined distance. Such a structure of the support element as a closed frame, it is possible aufzuspannen its clothing with high clamping forces, wherein the support element is stiffened by the movement mechanism or its articulation to the support element.

According to the invention, it is provided to damp the movement mechanism by at least one spring mechanism or a spring element. As a result, in particular with an adjustable spring mechanism or with an exchangeable spring element, it is possible to adjust the inclination and / or torsion behavior of the chair to the person using the chair.

According to the invention, it is provided to connect the seat part by a four-point bearing at four points of articulation with the movement mechanics and to connect the back part in particular by a two-point storage, in particular on support beams with an upper half of the back part in particular at two articulation points with the movement mechanics. By four-point articulation of the seat part and a rigid coupling of the divided by the plane of symmetry left and right half of the movement mechanism, the seat part is set to a tilting movement and an unwanted roll of the seat part is prevented by a lying in the plane of symmetry Wank axis. A two-point linkage of the back part offers in the points in which the user of the chair, the forces are introduced, an optimal support of the back part by the movement mechanics.

Finally, provision is made for the back part to be formed with a first buckling device, a lower section of the back part adjoining the transition part and an upper section of the back part adjoining the lower section being pivotably connected by the first buckling device, wherein the first buckling device is formed below a hinge region is, in which the torsion element is articulated to the back part, wherein the torsion element comprises a second buckling device, wherein a hinged to a base body of the movement mechanism lower portion of the torsion element and a hinged to the back member upper portion of the torsion element are pivotally connected by the second buckling device, wherein the second buckling device is formed above the lumbar support. By such a supplement of the chair according to the invention by two buckling means of the chair while retaining its properties described by a further function can be supplemented. This additional function is particularly intended for chairs with a high backrest, which extends into the neck area or into the head area of a person sitting on the chair. In this case, the upper portion of the back member tilts forward due to the special arrangement of the buckling devices when a person sitting in the chair reclines against the back, thus assisting the seated person in maintaining an approximately horizontal line of sight, for example when the person is seated Lean back continues to want to keep a monitor in view.

Further details of the invention are described in the drawing with reference to schematically illustrated embodiments.

Figur 1 und 2:

eine Seitenansicht und eine Rückansicht einer ersten Ausführungsvariante eines erfindungsgemäßen Stuhls;

Figur 3 und 4:

eine Seitenansicht und eine Rückansicht einer zweiten Ausführungsvariante eines erfindungsgemäßen Stuhls;

Figur 5 und 6:

eine Seitenansicht und eine Rückansicht einer dritten Ausführungsvariante eines erfindungsgemäßen Stuhls;

Figur 7 und 8:

eine Seitenansicht und eine Rückansicht einer vierten Ausführungsvariante eines erfindungsgemäßen Stuhls;

Figur 9 und 10:

eine Seitenansicht und eine Rückansicht einer fünften Ausführungsvariante eines erfindungsgemäßen Stuhls;

Figur 11 und 12:

eine Seitenansicht und eine Rückansicht einer sechsten Ausführungsvariante eines erfindungsgemäßen Stuhls;

Figur 13 - 15:

jeweils eine Schrägansicht zu der ersten, dritten und fünften Ausführungsvariante;

Figur 16:

eine perspektivische Darstellung der ersten Ausführungsvariante mit auskonstruierten Details;

Figur 17, 18:

weitere Ansichten des in der Figur 16 gezeigten Stuhls bei abgenommenem Gestell;

Figur 19 - 21:

Modifikationen zu der ersten Ausführungsvariante in zwei Seitenansichten und einer Rückansicht;

Figur 22 - 24:

Modifikationen zu der zweiten Ausführungsvariante in zwei Seitenansichten und einer Rückansicht;

Figur 25 - 27:

Modifikationen zu der dritten Ausführungsvariante in zwei Seitenansichten und einer Rückansicht;

Figur 28 - 30:

Modifikationen zu der vierten Ausführungsvariante in zwei Seitenansichten und einer Rückansicht;

Figur 31 - 33:

Modifikationen zu der fünften Ausführungsvariante in zwei Seitenansichten und einer Rückansicht und

Figur 34 - 36:

Modifikationen zu der sechsten Ausführungsvariante in zwei Seitenansichten und einer Rückansicht.

Hereby shows:

FIGS. 1 and 2:

a side view and a rear view of a first embodiment of a chair according to the invention;

FIGS. 3 and 4:

a side view and a rear view of a second embodiment of a chair according to the invention;

FIGS. 5 and 6:

a side view and a rear view of a third embodiment of a chair according to the invention;

FIGS. 7 and 8:

a side view and a rear view of a fourth embodiment of a chair according to the invention;

FIGS. 9 and 10:

a side view and a rear view of a fifth embodiment of a chair according to the invention;

FIGS. 11 and 12:

a side view and a rear view of a sixth embodiment of a chair according to the invention;

FIGS. 13-15

in each case an oblique view of the first, third and fifth embodiment variants;

FIG. 16:

a perspective view of the first embodiment with auskonstruierten details;

FIGS. 17, 18:

more views of the in the FIG. 16 shown chair with removed frame;

FIGS. 19-21:

Modifications to the first embodiment in two side views and a rear view;

FIGS. 22-24:

Modifications to the second embodiment in two side views and a rear view;

FIGS. 25-27:

Modifications to the third embodiment in two side views and a rear view;

FIGS. 28-30:

Modifications to the fourth embodiment in two side views and a rear view;

FIGS. 31-33:

Modifications to the fifth embodiment in two side views and a rear view and

Figure 34-36:

Modifications to the sixth embodiment in two side views and a rear view.

In the FIG. 1 is shown in side view a first embodiment of a chair 1. The chair 1 comprises a continuous support element 2, a movement mechanism 3 and a frame 4. The support element 2 comprises a seating area 5, a back area 6 and a transition area 7. Here, the seating area 5 forms a seat portion 8, the back area 6 a back portion 9 and Transition region 7 comprises a transition part 10 of the support element 2. The movement mechanism 3 comprises a torsion element 11 and two front levers 12 and 13, wherein the second front lever 12 in the illustration of FIG. 1 is covered by the first front lever 12. The torsion element 11 is formed as a first rocker 14 which is pivotally connected to the seat part 8 about a rotation axis 15 and pivotally connected to the frame 4 about a rotation axis 16. The two front levers 12, 13 are formed as a one-piece component as a second rocker 38. Furthermore, the torsion element 11 is connected at two attachment points 17 and 18 with the back part 9. The fastening points 17 and 18 are viewed in the y direction above a lumbar support 19 of the back part 9 in an upper half 20 of the back part 9. A middle part M11 of the torsion element 11 is designed as a torsion bar 21st formed, which runs in a symmetry plane 22 of the chair 1 perpendicular in space. The plane of symmetry 22 is also referred to as the xy plane and is perpendicular to the plane of the drawing FIG. 2 which the chair 1 from a in the FIG. 1 indicated arrow direction II shows. The frame 4 is formed as a stand frame. According to an embodiment variant, not shown, it is provided to execute the frame 4 as a bogie with rollers to use the chair, for example, as an office chair. Between the support element 2 and the frame 3, a schematically illustrated spring element 23 is arranged, which the support element 2 in the in the FIG. 1 shown rest position R1 and a load of the support member 2 partially compensated by a person sitting on the support element 2 person and allows a limited change in the position of the support member 2 relative to the frame 3 at a correspondingly high load. The movement mechanism 3 described above is designed so that the inclination of the seat part and the inclination of the back part are dependent on each other and the inclination of the back part 9 between a in the FIG. 1 shown initial position 9-1 and indicated by dashed lines end position 9-2 increases more than the inclination of the seat part 8 between a in the FIG. 1 shown initial position 8-1 and indicated by dashed lines end position 8-2. A relative movement, which takes place between the seat part 8 and the back part 9, when they move from their initial positions 8-1 and 9-1 in their end positions 8-2 and 9-2, is compensated by a deformation of the transition part 10, so that despite the continuous support element 2 in the chair 1, a so-called synchronous mechanism 24 is realized. The torsional properties of the torsion element 11 come into play when the person sitting on the chair 1 person does not lean centrally in the region of the plane of symmetry 22 on the back part 9, but this laterally, for example loaded in a load point 25. Such a load of the support element 2 leads to a deformation of the support element 2, namely to a torsion between the seat part 8 and the back part 9. This torsion of the support element 2 is limited by the torsion element 11 and in particular its torsion bar 21, since this builds up a counterforce, which is introduced via the attachment points 17 and 18 in the back part 9, wherein the torsion element 11 is supported for this purpose on the base frame 4. Such a limited torsion of the support element 2 is possible regardless of the inclination of the back part 9 of the support element 2 in each tilt position between the initial position 9-1 and the end position 9-2. The torsion bar 21 extends in the y direction upwards beyond the lumbar support 19 addition. The support element in the FIGS. 1 and 2 shown first embodiment variant comprises two L-shaped curved support beams 26 and 27 and a covering 28 which is spanned between the support bars 26 and 27. The torsion element 11 and the levers 12 and 13 of the movement mechanism 3 each engage the support bars 26 and 27, respectively. In continuation of the torsion bar 21, the torsion element 11 is formed as an antler 29, which branches the torsion bar 21 to the upper free ends 26a and 27a of the support bars 26 and 27, respectively.

In the FIG. 13 the chair 1 is additionally shown obliquely from behind in an oblique view. In this view, it can be seen how the two levers 12 and 13 form the second rocker 38 by a bracket 37 connecting them. Thus, the movement mechanism 3 essentially comprises the first rocker 14, the second rocker 38 and a base 41. The second rocker 38 has, as the first rocker 14 has a rotation axis 39 and a rotation axis 40, wherein all four axes of rotation 15, 16 and 39 , 40 of the movement mechanism 3 parallel to each other. The first rocker 14 is articulated not only in the region of the axis of rotation 15 to the support element 2, but with this also at the attachment points 17, 18 connected to the support bars 26, 27. A free rotation of the rockers 14, 38 about the axes of rotation 16, 40 is damped and limited by a spring mechanism 42 which integrates into the main body 41.

In the Figures 3 and 4 is a second embodiment a chair 30 shown in side view and rear view. With respect to this second embodiment is first on the description of the in the FIGS. 1 and 2 referenced first embodiment shown. Accordingly, the comparable components with the in the FIGS. 1 and 2 used reference numerals. In contrast to the first embodiment variant, the movement mechanism 3 essentially comprises only one torsion element 11, which is rigidly fastened between the seat part 8 of the support element 2 and the frame 4. Like the torsion element of the first embodiment variant, this torsion element 11 comprises a torsion bar 21 which splits off as antler 29 which is fastened to the free ends 26a and 27a of the support bars 26 and 27. In addition to its torsional properties, the torsion element 11 is still designed to be elastically elastic and thus springs back the back part 9 of the support element 2 between the initial position 9-1 and the end position 9-2, for which purpose the transition region 7 of the support element 2 is elastically deformed. The movement mechanism also includes a support element 48, with which the two support beams 26, 27 are held at a predefined distance from each other.

The Figures 5 and 6 show a third embodiment of a chair 31. With regard to this third embodiment is first to the description of the in the FIGS. 1 and 2 referenced first embodiment shown. Accordingly, the comparable components with the in the FIGS. 1 and 2 used reference numerals. In contrast to the first embodiment variant, the support element 2 in the third embodiment variant does not comprise supporting beams and stringing, but rather a L-shaped seat shell 32, which is formed, for example, from plastic. The seat shell 32 is elastically deformable, in particular in its transition region 7. Analogous to the FIG. 13 is in the FIG. 14 an oblique view of the in the Figures 5 and 6 shown chair 31 shown. Accordingly, here is the description of the FIG. 13 directed. The first rocker 14 is formed comparable to the first rocker of the first embodiment and connected at two points of articulation with the support element 2 instead on support bars are the pivot points 17, 18 but on the seat 32nd

The FIGS. 7 and 8th show a fourth embodiment of a chair 33. Regarding this fourth embodiment is first to the description of the in the FIGS. 1 and 2 referenced first embodiment shown. Accordingly, the comparable components with the in the FIGS. 1 and 2 used reference numerals. In contrast to the first embodiment variant, the support element 2 in the fourth embodiment variant does not comprise supporting beams and stringing, but rather a L-shaped seat shell 32, which is formed, for example, from plastic. The seat shell 32 is elastically deformable, in particular in its transition region 7. Furthermore, in contrast to the movement mechanism of the first embodiment variant, the movement mechanism 3 of the fourth embodiment variant comprises only one torsion element 11, which is rigidly fastened between the seat part 8 of the support element 2 and the frame 4. Like the torsion element of the first embodiment variant, this torsion element 11 comprises a torsion bar 21, which splits itself off as antlers 29 and is fastened to the free ends 26a and 27a of the supporting bars 26 and 27. In addition to its torsional properties, the torsion element 11 is still designed to be elastically elastic and thus springs back the back part 9 of the support element 2 between the initial position 9-1 and the end position 9-2, for which purpose the transition region 7 of the support element 2 is elastically deformed.

The Figures 9 and 10 show a fifth embodiment of a chair 34. Regarding this fifth embodiment is first on the description of the in the FIGS. 1 and 2 referenced first embodiment shown. Accordingly, the comparable components with the in the FIGS. 1 and 2 used reference numerals. In contrast to the first embodiment variant, the support element 2 in the fifth embodiment variant does not include support beams and no covering, but rather a L-shaped seat shell 32, which is formed, for example, from plastic. The seat pan 32 is in particular in its transition region 7 elastically deformable. Furthermore, the seat shell 32 is not connected via an antler of the torsion element 11, but is fastened centrally in the region of the plane of symmetry 22 to an extension 35 of the torsion bar 21. Analogous to the FIG. 13 and to FIG. 14 is in the FIG. 15 an oblique view of the in the Figures 9 and 10 shown chair 34 shown. Accordingly, here is the description of the FIG. 13 or 14 referenced. Deviating from the first rocker of the first and the third embodiment variant, the first rocker 14 does not fork in an antler shape, but has only one central articulation point 18, in which the first rocker 14 is connected to the seat shell 32 of the chair 34.

The Figures 11 and 12 show a sixth embodiment of a chair 36. Regarding this sixth embodiment is first to the description of the in the FIGS. 1 and 2 referenced first embodiment shown. Accordingly, the comparable components with the in the FIGS. 1 and 2 used reference numerals. In contrast to the first embodiment variant, the support element 2 in the sixth embodiment variant does not comprise supporting beams and stringing, but rather a L-shaped seat shell 32, which is formed, for example, from plastic. The seat shell 32 is elastically deformable, in particular in its transition region 7. Furthermore, in contrast to the movement mechanism of the first embodiment, the movement mechanism 3 of the sixth embodiment variant comprises only one torsion element 11, which is rigidly fastened between the seat part 8 of the support element 2 and the frame 4. The seat shell 32 is not connected via an antler of the torsion element, but is fastened centrally in the region of the plane of symmetry 22 to an extension 35 of the torsion bar 21. In addition to its torsional properties, the torsion element 11 is still designed to be elastically elastic and thus springs back the back part 9 of the support element 2 between the initial position 9-1 and the end position 9-2, for which purpose the transition region 7 of the support element 2 is elastically deformed.

In the FIG. 16 is with reference to the schematic representations of FIGS. 1 . 2 and 13 the chair 1 described as the first embodiment illustrated with structural details, wherein the frame 4 is shown without intended roles. Also, a covering 28 is indicated for the sake of clarity only as a hatched area. The supporting element 2 comprises, in addition to the supporting bars 26, 27 and the covering 28, two schematically illustrated spacer bars 43, 44. The spacer bars 43, 44 hold the two supporting bars 26, 27 at their free ends 26a, 26b and 27a, 27b at a defined distance a43, a44 (see FIG. 18 ) and thus ensure a high load-bearing capacity of the covering 28. A high load-bearing capacity of the covering 28 is further ensured by the articulation of the supporting bars 26, 27 on the movement mechanism 3. In the seating area 5, the carrier beam 26 is articulated to the second rocker arm 38 via a first articulation point A on the first rocker arm 14 and via a second articulation point B, which is concealed. In the seating area 5 of the support beam 27 is articulated via a first pivot point C on the first rocker 14 and a second pivot point D on the second rocker 38. Furthermore, the attachment points 17, 18, with which the forked torsion element 11 merges into the supporting beams 26, 27, two further articulation points E and F. Such a four-point storage of the seat portion 5 is a torsion of the seat area 5 or a rolling of the seat area during dynamic sitting Seating area 5 about a lying in the plane of symmetry 22 and extending in the x-direction roll axis WA (see FIG. 2 ) safely avoided and made sure that the back part 9, with appropriate load by the seated person, against the seating area 5 twisted. By an approximately X-shaped geometry of the torsion member 11 and the first rocker 14, the movement mechanism 3 gives the chair 1 a high stability while allowing a torsion-like twist between the upper half 20 of the back part 9 and the seat part 5, wherein the torsion by a elastic deformation of the torsion element 11, the support beams 26, 27 and the cover 28 is made possible. The torsion takes place in particular in the area of the lumbar support 19 and the transition part 10. The rotatable articulation of the first rocker 14 on the main body 41 of the movement mechanism 3 allows the torsion element 11 with appropriate load by the seated person a superposition of the torsion-like distortion with in the FIG. 2 The seat part 8 is connected in its front half 8a, which is close to the spacer 44, with the second rocker 38 and in its rear half 8b, which is connected to the Spacer 43 connects to the front half 8a, connected to the first rocker 14. As a result, the supporting beams 26, 27 are guided with two mirror images of the symmetry plane 22 arranged parallelogram P1 and P2 on the base body 41, the parallelogram P1, P2 are essentially formed by the two wings 14 and 38 and operate synchronously.

In the Figures 17 and 18 the chair 1 is shown in perspective in bottom views, was dispensed with the representation of the frame, the spacer rods, the covering and the spring mechanism. In the main body 41, two installation spaces 45, 46 can be seen for the spring mechanism, not shown. However, the spring mechanism, not shown, only has an influence on the inclination behavior of the chair 1. The torsional behavior of the chair 1 is not influenced by the spring mechanism, but only by the torsion element 11. In the FIG. 17 is completely visible as the seat part 8 is suspended by means of a four-point bearing 47 on the movement mechanism 3 via the articulation points A to D. Furthermore, it can be seen how the back part 9, which is shown only with the support bars 26, 27 and without covering and spacer bar, is suspended by means of a two-point bearing 49 via the pivot points E and F on the movement mechanism 3.

In the FIG. 18 are again the four parallel rotating axes 15, 16, 39 and 40 and the four free ends 26a, 26b and 27a, 27b of the two support beams 26, 27 are designated.

To the FIGS. 16 to 18 will also refer to the description of the FIGS. 1 . 2 and 13 Reference is made, where the reference numerals mentioned therein partially in the FIGS. 16 to 18 are noted.

A superposition of tilt and torsion is possible even when the first rocker 14 is formed in a λ-shape or upside-down Y-shaped, as shown in the fifth and sixth embodiment.

In the FIGS. 19 to 36 are modifications to the six in the FIGS. 1 to 12 illustrated embodiments in each case two side views and a rear view shown. Regarding the basic structure and the basic functioning of the in the FIGS. 19 to 36 Modifications shown will be corresponding to the description of the FIGS. 1 . 2 and 3, 3 and 4 . 5 and 5 . 6 and 7 . 8th and 9 . 10 and 11 . 12 directed. Unlike the ones in the FIGS. 1 to 12 featured chairs includes in all six in the FIGS. 19 to 36 shown chairs 1a (see FIGS. 19 to 21 ), 30a (see FIGS. 22 to 24 ), 31a (see FIGS. 25 to 27 ), 33a (see FIGS. 28 to 30 ), 34a (see FIGS. 31 to 33 ) and 36a (see FIGS. 34 to 36 ) the back part 9 a symbolically illustrated first buckling device 50 and the torsion element 11 a second symbolically illustrated buckling device 51, wherein by the first buckling device 50 adjoining the transition part 10 lower portion 52 of the back part 9 and an adjoining the lower portion 52 upper portion 53rd the back part 9 are pivotally connected. In this case, the first bending device 50 is arranged below an articulation region 54, in which the torsion element 11 is connected to the back part 9. The second buckling device 51 formed in the torsion element 11 comprises a lower section 55 of the torsion element 11 connected to a base body 41 of the movement mechanism 3 and an upper section 56 of the torsion element 11 connected to the back element 9 in the pivoting zone 54, the two sections 55, 56 by the second buckling device 51 are pivotally connected. In the hinge region 54, the upper portion 53 of the back 9 and the upper portion 56 of the torsion 11 are connected together. The second kink device 51 and thus also the first kink device 50 are formed above the lumbar support 19 of the chair 1a, 30a, 31a, 33a, 34a and 36a, respectively. In this case, the second kink device 51 is arranged below the first kink device 50.

The first buckling device 50 is preferably formed as a bending zone B50, which allows a kind of buckling between the lower portion 52 and the upper portion 53 of the back part 9, depending on the position in which the chair 1a 30a, 31a, 33a, 34a and 36a located. In a rest position R1, like this in the Figures 19 . 22 . 25 . 28 . 31 and 34 is shown, the lower portion 52 and the upper portion 53 of the back portion 9 to each other a first opening angle α-R1, wherein the opening angle α-R1 is in the already described to the individual embodiments symmetry plane 22 and contact between a person to a seated having a surface 52a of the lower portion 52 and a seated person contacting surface 53a of the upper portion 53 is measured. The rest position R1 is occupied by the chair 1a 30a, 31a, 33a, 34a and 36a when it is unloaded or when a person sits on the chair in such a way that the person exerts little or no pressure on the back element 9. In a reclined position R2 like this in the Figures 20 . 23 . 26 . 29 . 32 and 35 is shown, the lower portion 52 and the upper portion 53 of the back portion 9 to each other a second opening angle α-R2, wherein the opening angle α-R2 is also in the aforementioned plane of symmetry 22. The two interacting buckling devices 50 and 51 of the back part 9 and of the torsion element 11 cause a reduction of the opening angle from the value α-R1 to the value α-R2 during the transition from the position R1 to the position R2. Thus, the position, which the two sections 52, 53 of the back part 9 to each other changed take on the kind of a slightly closing flap. The upper portion 53 of the back portion 9 moves forward relative to the lower portion 52 of the back portion 9 in the arrow direction x. That is, the upper portion 53 of the back part 9 moves during the tilting movement which the chair 1a 30a, 31a, 33a, 34a, and 36a performs when a person sitting on the chair 1a 30a, 31a, 33a, 34a, and 36a, respectively Person leans against the back part 9, relative to the lower portion 52 of the back part 9 and this bends forward. This movement, which is counter to the tilting movement directed in the arrow directions x 'and y', stabilizes the neck and the head of the chair 1a 1a, 31a, depending on the shape and size of the upper portion 53 of the back 9 , 33a, 34a and 36a, respectively, and allows the person to maintain in an ergonomically desired manner an axis of view when reclining and in the reclined position, as the upper portion 53 of the back part 9, on the surface 53a of which the head the person sitting on the chair rests, inclines to a lesser extent between the position R1 and the position R1 than the lower portion 52 of the back part 9, on the surface 52a of which the person sitting on the chair leans against her upper body. Here, the second kink device 51 in both positions R1 and R2 of the chair 1a, 30a, 31a, 33a, 34a and 36a below the first kink device 50 is arranged.

The second buckling device 51 is preferably also formed as a bending zone B51, which allows a kind of buckling between the lower portion 55 and the upper portion 56 of the torsion bar 11. Wherein the buckling is controlled by the movement mechanism 3, whose component is the buckling device 51. In a rest position R1, like this in the Figures 19 . 22 . 25 . 28 . 31 and 34 is shown, the lower portion 55 and the upper portion 56 of the torsion bar 11 to each other a first opening angle β-R1, wherein the opening angle β-R1 lies in the already described to the individual variants of the plane of symmetry 22 and is measured. In a reclined position R2 like these in the Figures 20 . 23 . 26 . 29 . 32 and 35 is shown, the lower portion 55 and the upper portion 56 of the torsion member 11 to each other a second opening angle β-R2, wherein the opening angle β-R2 is also measured in the plane of symmetry 22. As a result of the fact that the upper section 56 kicks forward in the x-direction when changing from the position R1 to the position R2, the value of the opening angle decreases from β-R1 to β-R2. Thus, the upper portion 56 of the torsion member 11 moves forward relative to the lower portion 55 of the torsion member 11 when a person sitting on the chair 1a 30a, 31a, 33a, 34a, and 36a leans back. The two buckling devices 50 and 51 thus operate - as a result of the connection of their upper sections 53 and 56 in the articulation region 54 - synchronously, so that a closing movement of the movement mechanism 3, to which the buckling device 51 and the upper portion 56 of the torsion 11 belong the back part 9 of the support element 2 is transmitted. Accordingly, when leaving the position R2 in the position R1 again an opening movement of the lower and the upper portion 55, 56 of the movement mechanism 3 and thus in consequence of the coupling again an opening movement of the lower portion 52 and the upper portion 53 of the back part. 9

For the first bending device 50, it is provided to arrange this approximately at a height of the uppermost thoracic vertebra of a person sitting on the chair 1a 30a, 31a, 33a, 34a or 36a, in order to optimally support the neck or head in a reclined sitting position. Accordingly, the back part in the in FIGS. 19 to 36 shown modifications such that the upper portion 53 of the back portion 9 is located at the level of a neck area or a neck and head portion of a person sitting on the chair.

In the in the FIGS. 19 to 21 and 22 to 24 shown modifications of the first and second embodiment variant, the first buckling device 50 technically in the two support beams 26, 27 by one each as an elastic region trained bending zone B50 executed or alternatively formed by a respective joint element. The covering 28 follows the movement predetermined by the supporting bars 26, 27 without additional adaptation.

In the in the FIGS. 25 to 27 . 28 to 30 . 31 to 33 and 34 to 36 The first buckling device 50 is integrated into the seat shell 32 forming the support element 2 and extends horizontally over the back part 9. The first buckling device 50 is formed by a bending zone B50 designed as an elastic region or alternatively a joint element ,

In the in the FIGS. 19 to 21 . 22 to 24 . 25 to 27 and 28 to 30 The second bending device 51 in the torsion element 11 or the first rocker 14, which forms the torsion element 11, is formed underneath the antler 29 into which the torsion bar 21 bifurcates in the articulation region 54 in the Beams 26, 27 to pass. The second bending device 51 is formed by a bending zone B51 designed as an elastic region or alternatively as a joint element. The antler 29 forms the upper portion 56 of the torsion element 11. The antler 29 is in particular flat with the support bars 26, 37 are connected.

In the in the FIGS. 31 to 33 and 34 to 36 As shown modifications of the fifth and sixth embodiment, the second buckling device 51 in the torsion element 11 and the first rocker 14, which forms the torsion element 11, formed below the central articulation region 54, in which the rocker 14 is articulated to the seat shell 32. The second buckling device 51 is formed by a bending zone B51 designed as an elastic region or alternatively by a joint element.

The invention is not limited to illustrated or described embodiments. It rather includes Further developments of the invention within the scope of the protective rights claims.

LIST OF REFERENCE NUMBERS

1

Chair, 1st embodiment

1a

Chair, modification of 1

2

supporting

3

movement mechanism

4

frame

5

Sitting area of 2

6

Back area of 2

7

Transition area of 2

8th

Seat part of 2

8a

front half of 8

8b

rear half of 8

8-1

Starting position of 8

8-2

End position of 8

9

Back part of 2

9-1

Starting position of 9

9-2

End position of 9

10

Transition part of 2

11

torsion

12, 13

lever

14

first swingarm

15

first axis of rotation of 14

16

second axis of rotation of 14

17, 18

attachment point

19

lumbar support

20

upper half of 9

21

Torsion bar of 11

22

Symmetry plane or xy plane

23

spring element

24

synchronous mechanism

25

load point

26, 27

spar

28

covering

29

antler

30

Chair, 2nd embodiment

30a

Chair, modification of 30

31

Chair, 3rd embodiment

31a

Chair, modification of 31

32

seat

33

Chair, 4th embodiment

33a

Chair, modification of 33

34

Chair, 5th embodiment

34a

Chair, modification of 34

35

Extension of 21

36

Chair, 6th variant

36a

Chair, modification of 36

37

Temple between 12 and 13

38

second swingarm

39

Rotation axis of 38

40

Rotation axis of 38

41

Basic body of 3

42

Spring mechanism in 41

43, 44

Distance bar between 26 and 27

45, 46

Installation space for 42

47

Four-point storage of 5

48

Support element for 5

49

Two-point bearing of 9

50

first buckling device of 9

51

second buckling device of 11

52

lower section of 9

52a

Surface of 52

53

upper section of 9

53a

Surface of 53

54

Steering range from 11 to 9

55

lower section of 11

56

upper section of 11

A - F

Articulation point of 2

a43

Distance between 26a and 26b

a44

Distance between 27a and 27b

B50

bending zone

B51

bending zone

M11

Middle part of 11

P1, P2

parallelogram

R1

Rest position of the chair

R2

back inclined position of the chair

WA

Wank axis

x, y, z

direction

α-R1

first opening angle between 52 and 53

α-R2

second opening angle between 52 and 53

β-R1

first opening angle between 55 and 56

β-R2

second opening angle between 55 and 56

Claims (15)

1. A chair (1, 31, 34; 1a, 31a, 34a) comprising,

   - a continuous support element (2), a movement mechanism (3) and a frame (4),

   - wherein the support element (2) comprises a seat region (5), which forms a seat part (8),

   - wherein the support element (2) comprises a back region (6), which forms a back part (9),

   - wherein the support element (2) comprises a transition region (7), which connects the seat region (5) and the back region (6),

   - wherein the support element (2) uses elastic deformation to compensate for a relative movement between the back region (6) and the seat region (5), which occurs when the loading to which the chair (1, 31, 34; 1a, 31a, 34) is subjected, is changed by the person sitting on it,

   - wherein the movement mechanism (3) comprises a torsion element (11),

   - wherein the torsion element (11) supports the back part (9) and controls the inclination of the back part (9),

   - wherein the back part (9) of the support element (2) is connected to the torsion element (11) only above a lordosis support (19),
   characterized in that

   - the movement mechanism is arranged between the frame (4) and the support element (2),

   - that the movement mechanism (3) comprises a first rocker (14), a second rocker (38) and a base body (41),

   - that the second rocker (38) is rotatably hinged to the base body (41) and is rotatably hinged to a front half (8a) of the seat part (8),

   - and that the first rocker (14) is rotatably hinged to the base body (41), is rotatably hinged to a rear half (8b) of the seat part (8), and comprises the torsion element (11), which is connected to the back region (6) above a lordosis support (9).
2. The chair (1, 31, 34; 1a, 31a, 34a) according to claim 1, characterized in that

   - the back region (6) can be inclined and/or twisted from a sitting position relative to the seat region (5),

   - wherein a force, which causes the support element to be bent open and/or which causes a rotation of the back part (9) relative to the seat part (8) and which is introduced into the support element (2) by a sitting person, experiences a counter force by means of the movement mechanism (3),

   - wherein the movement mechanism (3) is connected to the support element (2) in the back region above a lordosis support (19), in particular in a central pivot point (18) or in particular in two lateral pivot points (17, 18), and is connected, in particular fixedly, in the seat region (5), or is in particular connected via two axes of rotation (15, 39), which are arranged in the seat region (5).
3. The chair (1, 31, 34; 1a, 31a, 34a) according to at least one of the preceding claims, characterized in that the torsion element (11) comprises a torsion rod (21), which runs upwards beyond the lordosis support (19) in a vertical axis of symmetry (22) of the chair (1, 31, 34; 1a, 31a, 34).
4. The chair (1, 31, 34; 1a, 31a, 34a) according to at least one of the preceding claims, characterized in that a connection of the support element (2) to the movement mechanism (3) in the back region (6) of the support element (2) below the lordosis support (19) and in the transition region (7) of the support element (2) is avoided so as to provide the deformation.
5. The chair (1; 1a) according to at least one of the preceding claims, characterized in that the support element (2) comprises two support beams (26, 27), which are bent in an L-shaped manner, and a cover (28), wherein the cover (28) is stretched between the support beams (26, 27).
6. The chair (1, 31, 34; 1a, 31a, 34a) according to at least one of the preceding claims, characterized in that the movement mechanism (3) is arranged between the frame (4) and the support element (2) and supports the back part (9) of the support element (2) as well as the seat part (8) of the support element (2), wherein the movement mechanism (3) controls an inclination of the seat part (8) and an inclination of the back part (9) is controlled as a function of the forces, with which a person sitting on the chair (1, 31, 34; 1a, 31a, 34a) acts on the latter,
   wherein the inclination of the seat part (8) and the inclination of the back part (9) are controlled as a function of one another, and wherein the inclination of the back part (9) between an initial position (9-1) and an end position (9-2) increases more than the inclination of the seat part (8).
7. The chair (31, 34; 31a, 34a) according to at least one of the preceding claims, characterized in that the support element (2) is embodied as seat shell (32), which is bent in an L-shaped manner.
8. The chair (1) according to at least one of the preceding claims, characterized in that, in its seat region (5), the support element (2) is rigidly fixed to the frame (4).
9. The chair (1, 31, 34; 1a, 31a, 34a) according to claim 2, characterized in that the two axes of rotation (15, 39), which are arranged in the seat region, run parallel to one another and orthogonally penetrate a vertical plane of symmetry (22) of the chair (1, 31, 34; 1a, 31a, 34a);
   characterized in that the force, which the movement mechanism (3) introduces to compensate the force introduced by a sitting person, creates a counter force, which is at least 50% and in particular at least 70% of a required total counter force, wherein the remaining counter force is created by means of the support element (2), which deforms.
10. The chair according to at least one of the preceding claims 1 to 9, characterized in that the movement mechanism (3) is arranged between the frame (4) and the support element (2), wherein the movement mechanism (3) comprises an in particular elastically deformable bearing element (48), which is arranged between the frame (4) and the seat part (8), and wherein the movement mechanism (3) comprises an elastically deformable rocker (14), which comprises the torsion element (11) and which is connected to the frame (4) and to the back region (6) above a lordosis support (9).
11. The chair (1; 1a) according to claim 5, characterized in that the support element also comprises two spacer rods (43, 44), wherein the support beams (26, 27) are held at a defined distance by means of the two spacer rods (43, 44), which connect free ends (26a, 26b; 27a, 27b) of the support beams (26, 27), and are held in the defined distance by means of the movement mechanism (3).
12. The chair (1, 31, 34; 1a, 31a, 34a) according to one of the preceding claims, characterized in that the movement mechanism is cushioned by means of at least one spring mechanism (42) or a spring element (23).
13. The chair (1, 31, 34; 1a, 31a, 34a) according to one of the preceding claims, characterized in that the seat part (8) is connected to the movement mechanism (3) at four pivot points (A, B, C, D) by means of a four point bearing (47), and that the back part is connected to an upper half (20) of the back part (9), in particular by means of a two point bearing (49) in particular at support beams (26, 27) in particular to the movement mechanism (3) at two pivot points (E, F).
14. The chair (1a, 31a, 34a) according to at least one of the preceding claims, characterized in

    - that the back part (9) comprises a first bending device (50),

    - wherein the first bending device (50) connects a lower section (52) of the back part (9), which adjoins the transition part (10), and an upper section (53) of the back part (9), which adjoins the lower section (52), in a pivotable manner,

    - wherein the first bending device (50) is arranged below a pivot region (54), in which the torsion element (11) is connected to the back part (9),

    - wherein the torsion element (11) comprises a second bending device (51),

    - wherein the second bending device (51) connects a lower section (55) of the torsion element (11), which is hinged to a base body (41) of the movement mechanism (3), and an upper section (56) of the torsion element (11), which is hinged to the back element (9), in a pivotable manner,

    - wherein the second bending device (51) is embodied above the lordosis support (19).
15. The chair according to claim 14, characterized in that, in response to a movement of the chair (1a, 30a, 31a, 33a, 34a, 36a) from a rest position (R1) into a reclined position (R2) as a result of a decrease of an opening angle (β-R1, β-R2) between the lower section (55) of the torsion element (11) and the upper section (56) of the torsion element (11) measured in a vertical plane of symmetry (22), the second bending device (51) forces a decrease of an opening angle (α-R1, α-R2) between the lower section (52) of the back part (9) and the upper section (53) of the back part (9), also measured in the vertical plane of symmetry (22), so that the upper section (53) of the back part (9) is moved forwards in an arrow direction (x) relative to the lower section (52) of the back part (9) in response to moving the chair (1a, 30a, 31a, 33a, 34a, 36a) from the rest position (R1) into the reclined position (R2).

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