DE212022000176U1 - Chair - Google Patents

Abstract

Chair (1) comprising a support structure (2) and a seat element (3) carried by the support structure (2),
wherein the support structure (2) comprises a support cross (7) having at least two legs (6) and a beam element (4), which support cross (7) and/or which beam element (4) each has an edge region (5a) of a first section ( 5) can be arranged on a surface,
wherein the beam element (4) is connected to the seat element (3),
characterized in that
the at least two legs (6) of the support cross (7) are connected to a limiting element (10) in a second section (18) opposite the first section (5), whereby one through the limiting element (10) and the at least two legs ( 6) forms a limited receiving opening (8), through which receiving opening (8) the beam element (4) is carried out at least in sections and is mounted displaceably or rotatably in this receiving opening (8) in order to ensure a relative positioning of the beam element (4) with respect to the support cross (7 ) to enable
and that
the support structure (2) further comprises an adjustable locking element (9), which locking element (9) engages the support cross (7) and the beam element (4) in order to set at least two different relative positions between the beam element (4) and the support cross (7). and to fix.

Description

FIELD OF THE INVENTION

The invention relates to a chair comprising a support structure and a seat element supported by the support structure,
wherein the support structure comprises a support cross having at least two legs and a beam element, which support cross and/or which beam element can each be arranged on a base with an edge region of a first section,
wherein the beam element is connected to the seat element.

STATE OF THE ART

Generic chairs comprising a support structure and a seat element supported by the support structure are generally known.

A chair is a piece of seating furniture designed in many variants, usually for one person, which is usually composed of a support structure and a seat element, the seat element comprising a seat and possibly a backrest. In order to ensure that the chair stands particularly securely while maintaining a simple structure, it is advantageous if the support structure comprises crossing (leg) elements.

For example shows US 4705250 A a support structure with intersecting elements for a table or seating element that can be quickly and easily assembled in multiple geometric configurations. EP 0442 832 A1 also shows a support structure with intersecting elements for a seat element, the support structure being simple and rigid and having three feet.

The disadvantage of the simply constructed chairs known from the prior art is that the sitting position cannot be individually adjusted. The seat tilt cannot be adjusted, nor can the seat height be adjusted. However, this is essential, especially when sitting for longer periods of time, as everyone has a different sitting posture and a different feeling of sitting comfort.

TASK OF THE INVENTION

It is therefore an object of the present invention to provide a chair that overcomes the disadvantages of the prior art, wherein the sitting position, in particular an inclination of the seat, should be particularly easy to adjust. Furthermore, the chair should be economical to produce and flexible in use.

PRESENTATION OF THE INVENTION

This task is carried out in a chair comprising a support structure and a seat element supported by the support structure,
wherein the support structure comprises a support cross having at least two legs and a beam element, which support cross and/or which beam element can each be arranged on a base with an edge region of a first section,
wherein the beam element is connected to the seat element, solved according to the invention in that
the at least two legs of the support cross are connected to a limiting element in a second section opposite the first section, whereby a receiving opening delimited by the limiting element and the at least two legs is formed, through which receiving opening the beam element is carried out at least in sections and can be moved or rotated in this receiving opening is mounted to enable relative positioning of the beam element with respect to the support cross,
and that
the support structure further comprises an adjustable locking element, which locking element engages the support cross and the beam element in order to adjust and fix at least two different relative positions between the beam element and the support cross.

In the context of this invention, a chair is understood to mean a piece of seating furniture with or without a backrest for one or more people.

It is conceivable that the support structure or at least parts of the support structure are made of wood and/or a metallic material.

The two legs of the support cross are connected to the limiting element in the second section, which forms the receiving opening. The beam element is arranged at least in sections within this receiving opening and is mounted so that it can be moved or rotated. This arrangement makes it easy to achieve relative positioning between the beam element and the support cross. Depending on the different positioning of the beam element to the support cross, an angle between the beam element and the support cross is changed. This allows the inclination of the seat surface of the seat element connected to the beam element to be adjusted.

In the context of the present invention, the at least sectional arrangement of the beam element in the receiving opening means that at least a part or a section of the beam element is located within the receiving opening. At least this part or this section of the beam element is mounted in a displaceable or rotatable manner within the receiving opening.

It is conceivable that with a correspondingly small angle between the beam element and the support cross in an operating state in which the chair according to the invention is arranged on the ground, the seat is inclined forward, i.e. a front seating area of the seat is inclined towards the ground. As the angle increases, the seat is initially aligned essentially horizontally, i.e. essentially parallel to the ground, while as the angle increases, the seat is tilted backwards, i.e. the front seating area of the seat is tilted away from the ground.

For example, when the seat is tilted forward, the pelvis of a person sitting on the chair according to the invention is tilted forward, which has a positive effect on the straightening of the spine. This also increases the opening angle of the body, which allows the blood to circulate better.

In contrast, if the seat is tilted backwards, a more “relaxed” position can result for the person sitting on the chair according to the invention.

In order to be able to adjust and fix at least two different relative positions between the beam element and the support cross and, consequently, the corresponding angle between the beam element and the support cross, the support structure of the chair according to the invention comprises the locking element, which engages both the beam element and the support cross.

It is conceivable that the locking element is connected to the beam element and/or to the support cross, preferably to the first section of the beam element and/or the support cross, or to the beam element and/or to the support cross, preferably to the first section of the Beam element and / or the support cross is engaged. Other arrangement and connection options are of course not excluded.

• - aus einem metallischen Werkstoff, wie einer AluminiumLegierung oder Stahl, beispielsweise C45 oder 16MnCr5, oder Edelstahl, beispielsweise 1.4301, oder
• - aus einem Kunststoff, beispielsweise ein thermoplastischer Kunststoff, z.B. Polyoxymethylen, oder ein Elastomer oder ein Duromer, z.B. Gummi,

gefertigt sein.The locking element or individual elements thereof can

• - made of a metallic material, such as an aluminum alloy or steel, for example C45 or 16MnCr5, or stainless steel, for example 1.4301, or
• - made of a plastic, for example a thermoplastic, for example polyoxymethylene, or an elastomer or a duromer, for example rubber,

be manufactured.

It is conceivable that the chair according to the invention comprises, in a first form, a support structure and a seat element supported by the support structure,
wherein the support structure comprises a support cross having two legs and a beam element, which support cross and which beam element can each be arranged on a base with an edge region of a first section,
wherein the beam element is connected to the seat element, the two legs of the support cross being connected to a limiting element in a second section opposite the first section, whereby a receiving opening delimited by the limiting element and the two legs is formed, through which receiving opening the beam element is carried out and is slidably mounted in this receiving opening in order to enable a relative positioning of the beam element with respect to the support cross, the support structure further comprising an adjustable locking element, which locking element engages on the support cross and on the beam element in order to set at least two different relative positions between the beam element and the support cross and to fix.

The first form corresponds to those discussed in the chapter “Ways of Carrying Out the Invention”. 1 to 10 .

In a second form, the chair according to the invention may comprise a support structure and a seat element supported by the support structure,
wherein the support structure comprises a support cross having two legs and a beam element, which support cross can be arranged with an edge region of a first section on a substrate,
wherein the beam element is connected to the seat element, wherein the two legs of the support cross are connected to a limiting element in a second section opposite the first section, whereby a receiving opening is formed which is limited by the limiting element and the two legs, through which receiving opening the beam element is guided in sections and is rotatably mounted in this receiving opening in order to achieve a relative To enable positioning of the beam element with respect to the support cross,
wherein the support structure further comprises an adjustable locking element, which locking element engages the support cross and the beam element in order to adjust and fix at least two different relative positions between the beam element and the support cross.

The second form is in those discussed in the chapter “Ways of Carrying Out the Invention”. 11 to 15 visible. In order to further increase the stability of the support structure of the chair according to the invention, an embodiment variant of the invention provides that the support cross further comprises a connecting element, wherein the at least two legs in the first section of the support cross are connected to the connecting element.

I.e. the at least two legs are connected to the connecting element in the first section and to the limiting element in the second section, whereby the entire support structure is very resistant to (high) stress. In particular, the risk of the chair according to the invention tipping over in the operating state is reduced as much as possible.

In a further embodiment variant of the invention it is provided that the locking element comprises a gas pressure spring in order to essentially continuously adjust and fix the relative position between the beam element and the support cross.

A gas pressure spring is characterized by a compact design, easy assembly and the possibility of integrating a damping mechanism. Using the gas pressure spring, the chair according to the invention can also be used as a rocking chair in the operating state by not locking or blocking the gas pressure spring (i.e. opening it).

A further variety of design options are conceivable for the locking element. For example, the locking element can comprise a locking wave plate and/or a lockable tension damper and/or a stepper motor with coarse threads. It is further conceivable that the locking element comprises a tension spring in order to dampen the chair according to the invention in the operating state. For example, the tension spring can be a contact spring. On the one hand, a locking element comprising a toothed rack and a locking element and, on the other hand, a locking element comprising an unlocking bolt and a guide element have proven to be particularly advantageous. Therefore, in a further embodiment variant of the invention it is provided that the locking element has a toothed rack and a locking element,
wherein the rack is connected to the beam element or to the support cross and the locking element is connected to the support cross or to the beam element,
wherein the rack is engageable with the locking element to adjust and fix the relative position.

Preferably, the rack is connected to the first section of the beam element or to the first section of the support cross and the locking element is preferably connected to the first section of the support cross or to the first section of the beam element.

Each tooth gap, i.e. the distance between two adjacent teeth on the rack, forms a locking position. That is, if the locking element engages in a specific locking position, then a specific relative position of the at least two different relative positions between the beam element and the support cross is set and fixed.

In this design variant, the locking element is very precise and can allow the setting of numerous relative positions between the beam element and the support cross, since a large number of teeth can be provided on the rack, which teeth can be brought into engagement with the locking element. Furthermore, the locking element is particularly durable if the appropriate material is selected. For example, the rack and/or locking element can be made of steel or plastic.

It is conceivable that the rack and locking element form a telescopic adjustment fitting.

In a further embodiment variant of the invention it is provided that the locking element comprises an unlocking bolt,
wherein the limiting element has a through opening through which through opening the unlocking bolt can be passed and brought into engagement with the beam element.

The unlocking bolt can be arranged in sections within the through opening of the limiting element and can be held by means of the through opening. I.e. with a corresponding arrangement, the unlocking bolt can be pushed through the through opening, whereby it engages with the beam element.

It is conceivable that the beam element has at least two bores, which bores are preferably arranged in the second section of the beam element and into which bores the unlocking bolt can be inserted in order to fix the beam element with respect to the support cross. Depending on which hole the unlocking bolt is inserted into, a specific relative position of the at least two different relative positions between the beam element and the support cross is set and fixed.

In any case, the locking element in this embodiment variant has a very simple construction, which is why it can be produced particularly economically.

In order to ensure a particularly stable connection of the two legs of the support cross, a further embodiment variant of the invention provides that the two legs of the support cross are connected to one another by means of a leaf connection, in particular by means of sheeting.

A leaf connection is, for example, a joint, a miter or an overlap.

To connect the two legs, an overlay, which is a form-fitting connection, is preferably used, since with such a connection the crossing legs do not slip against each other, especially under load. In the case of a sheeting, both parts, i.e. both legs, are usually machined to about half their thickness at the connection point. The remaining material of both legs lies on top of each other in the area of the connection point.

It is alternatively or additionally conceivable that the two legs in the area of the connection point are at least partially covered with a plate. Preferably, a plate is arranged on both sides of the connection point - i.e. on that side of the connection point that faces a surface and on that side that faces the seat element.

In a further embodiment variant of the invention it is provided that the beam element comprises two struts at least in sections,
and that
the support structure comprises a projection, which projection is directed from the limiting element into the receiving opening, the projection being arranged at least in sections between the two struts in order to stabilize the beam element.

The projection is therefore essentially vertical - i.e. rotated by 90° with respect to a longitudinal extent of the limiting element - from the limiting element into the receiving opening. The projection preferably extends to the junction of the two legs.

By arranging the projection at least in sections, the beam element is stabilized with respect to the support cross, if necessary, despite strong fluctuations, and thus ensures a safe and stable arrangement of the support structure.

The seat height - i.e. the distance between the ground and the seat surface of the seat element - also has a non-negligible influence on a good sitting position, which is why in a further embodiment variant of the invention it is provided that the seat element is mounted on the beam element so that it can move in the longitudinal direction of the beam element , which allows the seat height to be adjusted quickly and easily. The chair according to the invention is therefore suitable for people regardless of their body size.

Preferably, the seat element is slidably mounted in an area of the beam element, which area is located above the support structure in the operating state of the chair.

It is conceivable that the seat height, which corresponds to the distance between a surface and the seat element, is in a range between 25 cm and 90 cm, preferably between 30 cm and 65 cm, particularly preferably between 35 cm and 60 cm, particularly preferably between 40 cm and 45 cm, is adjustable.

In order to prevent the seat element from being pushed down by the beam element, a further embodiment variant of the invention provides that the beam element has a stop element arranged in the second section, in particular in an edge region of the second section, in order to limit displacement of the seat element. This design can be implemented in a structurally simple and economical manner.

In a further embodiment variant of the invention it is provided that the seat element has a seat arranged on at least one support element, the seat being displaceably mounted on the beam element by means of the at least one support element.

This embodiment variant can be a stool, i.e. a chair according to the invention without a backrest, or an armchair, i.e. a chair according to the invention with a backrest.

The at least one support element enables the seat element to be stored securely and in a balanced manner. Furthermore, this design allows the seat element to be moved easily without putting undue strain on the seat.

In order to enable exact and defined adjustment of different seat heights, a further embodiment variant of the invention provides that the at least one support element can be brought into engagement with the beam element. This means that in this embodiment variant it is a form-fitting connection between the at least one support element and the beam element.

It is conceivable that the beam element has at least two, preferably several, grooves, into which grooves the support element engages, whereby a specific seat height is determined or fixed. In particular, the engagement between the support element and the beam element can be released by “tilting up” the support element together with the seat - i.e. tilting it in the direction of the second section of the beam element. The support element including the seat can then be moved along the beam element until it engages in a groove in the beam element adjacent to the “first” groove, whereby a different seat height is fixed.

In a further embodiment variant of the invention it is provided that the seat element comprises at least one support element, which at least one support element is movably connected to the at least one support element and can be arranged in such a way as to support the support element on the beam element. I.e. the at least one support element serves to further stabilize the support element with respect to the beam element and is arranged below the seat. It is conceivable that the at least one support element is connected to the at least one support element with an edge region.

Due to the movable connection between the support element and the support element, the support element can be folded in relative to the support element - i.e. in the direction of the seat - or folded away - i.e. in the direction of the beam element - whereby the seat height can be additionally reduced. In particular, a minimum seat height can be achieved by folding, which in the chair according to the invention can be in a range of 40 cm to 30 cm, preferably in a range of 38 cm to 32 cm, particularly preferably in a range of 36 cm to 34 cm become.

In a further embodiment variant of the invention it is provided that the seat element has two support elements, wherein the beam element can be clamped between the two support elements. I.e. in this embodiment variant, the two support elements clamp the beam element - so it is a non-positive connection. The advantages of such a connection lie in the cost-effective production and the simple and “infinite” adjustment.

In order to prevent mobility, it is conceivable that the two support elements are connected to one another by means of a screw connection or a lever connection. The force of the screw connection or the lever connection braces the two support elements with the beam element and thereby fixes them on the beam element - i.e. the clamping effect takes place via the screw connection or the lever connection.

For example, a screw of the screw connection is tightened, whereby the beam element is clamped between the two support elements. This means that the two support elements generate surface pressure.

In order to increase the seating quality, a further embodiment variant of the invention provides that the seat element has at least one backrest connected to the at least one support element or to the seat. The backrest is therefore part of the seat element and can serve as a support for a person's head and/or back and/or arms. This means that the backrest can support the spine and/or the arms and/or the head of a person and thus relieve the strain on parts of that person's body when sitting.

In this embodiment variant, the backrest can be connected to the seat in a fixed or movable or pivotable manner.

To limit and support the backrest, a further embodiment variant of the invention provides that the backrest comprises a support element arranged along a longitudinal direction of the backrest and that the at least two struts each have at least two, preferably several, through openings, the through openings in the at least two Struts are each arranged in pairs to one another, so that a bolt can be carried out, on which bolt the support element can be supported.

The support element serves on the one hand as a reinforcement of the backrest - i.e. the backrest can withstand higher loads in this design variant - and on the other hand as a stop/support element on the bolt.

Preferably, the at least two through openings of the at least two struts are arranged in the second section of the beam element.

Depending on which of the at least two through openings of each strut, which through openings are aligned in pairs with one another, the bolt is passed through, the seat element can be lowered accordingly.

To reinforce and guide the backrest, a further embodiment variant of the invention provides that the backrest comprises a guide element with a through slot arranged in the longitudinal direction of the guide element, and that the at least two struts each have at least one through opening, which through openings are arranged relative to one another in such a way that a bolt can be guided through the through openings and through the through slot. In particular, the through openings are aligned with one another in pairs.

Preferably, the guide element is arranged between the two struts of the beam element.

It is conceivable that the bolt has an eccentric lever on one side and that the seat height of the chair according to the invention can be conveniently adjusted and fixed by opening or loosening and closing or fixing the eccentric lever. This means that when the eccentric lever is closed/fixed, the at least two struts are pressed against the guide element in such a way that the seat is fixed, while when the eccentric lever is opened/loosened, there is no pressure between the struts and the guide element, which means that the seat can be moved along the bar element.

In order to make the chair according to the invention flexible in use, it is provided in a further embodiment variant of the invention that the backrest is pivotally connected to the at least one support element about an axis of rotation, the chair according to the invention being folded or rotated or pivoted about the axis of rotation can be converted from an armchair state into a stool state, the backrest in the stool state being oriented at least in sections starting from the seat in the direction of the ground.

Of course, the chair according to the invention can also be converted from the stool state to the armchair state by folding or rotating or pivoting the backrest, the backrest being oriented away from the ground at least in sections from the seat in the armchair state.

In order to increase the stability of the chair according to the invention in the stool state, it is provided in a further embodiment variant of the invention that the backrest in the stool state is arranged in such a way that the backrest serves as a support for the at least one support element, in that the backrest rests at least in sections on the first section. This means that the backrest also supports the at least one support element, whereby it is optimally secured against slipping, especially under load in the operating state.

It is conceivable that it is still possible to adjust the inclination of the seat when stooled.

In order to ensure simple and economical production of the chair according to the invention, a further embodiment variant of the invention provides that the seat and the at least one backrest are formed in one piece. This eliminates the need for any connecting means between the seat and backrest.

BRIEF DESCRIPTION OF THE FIGURES

The invention will now be explained in more detail using exemplary embodiments. The drawings are exemplary and are intended to explain the idea of the invention, but are in no way intended to restrict or even exhaustively represent it.

• 1 eine schematische Seitenansicht von rechts einer ersten Ausführungsvariante eines erfindungsgemäßen Stuhls;
• 2 eine schematische Vorderansicht der ersten Ausführungsvariante des erfindungsgemäßen Stuhls;
• 3 eine schematische axonometrische Ansicht einer zweiten Ausführungsvariante des erfindungsgemäßen Stuhls mit ausgeklapptem Abstützelement;
• 4 eine schematische Seitenansicht von rechts der zweiten Ausführungsvariante des erfindungsgemäßen Stuhls mit ausgeklapptem Abstützelement;
• 5 eine schematische Seitenansicht von rechts der zweiten Ausführungsvariante dreier erfindungsgemäßer Stühle jeweils mit ausgeklapptem Abstützelement und unterschiedlichen Sitzflächenneigungen;
• 6 eine schematische axonometrische Ansicht der zweiten Ausführungsvariante des erfindungsgemäßen Stuhls mit eingeklapptem Abstützelement;
• 7 eine schematische Seitenansicht von rechts der zweiten Ausführungsvariante des erfindungsgemäßen Stuhls mit eingeklapptem Abstützelement;
• 8 eine schematische axonometrische Ansicht der zweiten Ausführungsvariante des erfindungsgemäßen Stuhls mit ausgeklapptem Abstützelement und mit eingeklappter Lehne;
• 9 eine schematische Hinteransicht der zweiten Ausführungsvariante des erfindungsgemäßen Stuhls mit ausgeklapptem Abstützelement und mit eingeklappter Lehne;
• 10 eine schematische Seitenansicht von rechts der zweiten Ausführungsvariante des erfindungsgemäßen Stuhls mit ausgeklapptem Abstützelement und mit eingeklappter Lehne;
• 11 eine schematische axonometrische Ansicht einer dritten Ausführungsvariante des erfindungsgemäßen Stuhls mit ausgeklappter Lehne;
• 12 eine schematische Seitenansicht von rechts der dritten Ausführungsvariante;
• 13 eine schematische Seitenansicht von rechts der dritten Ausführungsvariante mit im Vergleich zu 12 anderer Sitzflächenneigung;
• 14 eine schematische axonometrische Ansicht der dritten Ausführungsvariante mit eingeklappter Lehne;
• 15 eine schematische Seitenansicht von rechts der dritten Ausführungsvariante mit eingeklappter Lehne.

This shows:

• 1 a schematic side view from the right of a first embodiment variant of a chair according to the invention;
• 2 a schematic front view of the first embodiment variant of the chair according to the invention;
• 3 a schematic axonometric view of a second embodiment variant of the chair according to the invention with the support element folded out;
• 4 a schematic side view from the right of the second embodiment variant of the chair according to the invention with the support element folded out;
• 5 a schematic side view from the right of the second embodiment variant of three chairs according to the invention, each with a folded-out support element and different seat inclinations;
• 6 a schematic axonometric view of the second embodiment variant of the Chair according to the invention with folded support element;
• 7 a schematic side view from the right of the second embodiment variant of the chair according to the invention with the support element folded in;
• 8th a schematic axonometric view of the second embodiment variant of the chair according to the invention with the support element folded out and the backrest folded in;
• 9 a schematic rear view of the second embodiment variant of the chair according to the invention with the support element folded out and the backrest folded in;
• 10 a schematic side view from the right of the second embodiment variant of the chair according to the invention with the support element folded out and the backrest folded in;
• 11 a schematic axonometric view of a third embodiment variant of the chair according to the invention with the backrest folded out;
• 12 a schematic side view from the right of the third embodiment variant;
• 13 a schematic side view from the right of the third embodiment variant compared to 12 different seat inclination;
• 14 a schematic axonometric view of the third embodiment variant with the backrest folded in;
• 15 a schematic side view from the right of the third embodiment variant with the backrest folded.

WAYS OF CARRYING OUT THE INVENTION

1 shows a side view from the right of a first embodiment variant of a chair 1 according to the invention, while 2 represents the corresponding front view of this embodiment variant, the chair 1 according to the invention having a support structure 2 and a seat element 3 supported by it.

The support structure 2, which is made of wood in this embodiment variant, comprises a support cross 7 having two legs 6 and a beam element 4, which can each be arranged on a surface with an edge region 5a of a first section 5. In the first embodiment variant, the two legs 6 are connected to one another by means of sheeting and are additionally covered with a plate on both sides in the area of the sheeting to increase stability.

In a section 18 of the support cross 7 opposite the first section 5, the two legs 6 are connected to one another by means of a limiting element 10, whereby a receiving opening 8 is formed, which is limited by the limiting element 10 and by the two legs 6. The beam element 4 is passed through this receiving opening 8 and is slidably mounted. I.e. the beam element 4 can be moved within the receiving opening 8 in order to enable a relative positioning of the beam element 4 with respect to the support cross 7. Depending on the different positioning of the beam element 4 to the support cross 7, an angle between these two elements is changed, whereby an inclination of the seat surface of the seat element 3 connected to the beam element 4 can be adjusted.

In the first embodiment variant, the seat element 3 comprises a seat 3a and a backrest 3b, the seat 3a being arranged on two support elements 12. The two support elements 12 are slidably mounted on the beam element 4, whereby a seat height can be adjusted quickly and easily. In order to fix the appropriately adjusted seat height, the beam element 4 can be clamped between the two support elements 12 by means of a screw connection. The force of the screw connection braces the two support elements 12 with the beam element 4, whereby a surface pressure of the support elements 12 on the beam element 4 is generated.

In the first embodiment variant, the seat height can essentially be adjusted in a range between 40 cm and 45 cm. This means that the minimum seat height is approx. 40 cm, while the maximum seat height is approx. 45 cm.

In this embodiment, seat 3a and backrest 3b are movable, i.e. adjustable, connected to one another by means of a screw connection. In addition, the backrest 3b in this embodiment variant includes an adjustable head part.

The support structure 2 further has a locking element 9 which engages both the beam element 4 and the support cross 7, which in the first embodiment variant comprises an unlocking bolt 9c, by means of which different relative positions between the beam element 4 and the support cross 7 can be adjusted and fixed. For this purpose, the limiting element 10 has a through opening through which the unlocking bolt 9c can be passed and brought into engagement with the beam element 4. For this purpose, the beam element 4 has several holes (not shown) into which the unlocking bolt 9c - after it has passed through the through opening of the boundary elements 10 was carried out - can be introduced in order to fix the beam element 4 with respect to the support element 7.

• - Das Arretierungselement 9 weist in der zweiten Ausführungsvariante eine Zahnstange 9a und ein Rastelement 9b auf, wobei die Zahnstange 9a mit dem ersten Abschnitt 5 des Balkenelements 4 verbunden ist und das Rastelement 9b mit dem ersten Abschnitt 5 des Stützkreuzes 7 verbunden ist. Sowohl Zahnstange 9a als auch Rastelement 9b sind in der zweiten Ausführungsvariante aus Stahl gefertigt. Um die relative Position zwischen dem Balkenelement 4 und dem Stützkreuz 7 in dieser Ausführungsvariante einzustellen und zu fixieren, muss das Rastelement 9b in Eingriff mit der Zahnstange 9a gebracht werden.
• - Das Balkenelement 4 umfasst zwei Streben 11 und die Stützstruktur 2 weist einen in die Aufnahmeöffnung 8 gerichteten Vorsprung 10a auf, welcher zwischen den beiden Streben 11 angeordnet ist. Der Vorsprung 10a ragt also in die Aufnahmeöffnung 8 hinein und erstreckt sich in dieser Ausführungsvariante vom Begrenzungselement 10 bis zum Bereich der Überblattung. Der Vorsprung 10a dient der Stabilisierung der Stützstruktur 2.
• - Das Sitzelement 3 umfasst des Weiteren ein Abstützelement 14, welches zwischen den beiden Auflageelement 12 auf jener Seite des Sitzes 3a, die von der Lehne 3b weg weist, angeordnet und beweglich mit den beiden Auflageelementen 12 verbunden ist. Das Abstützelement 14 ist klappbar und kann entweder in Richtung des Sitzes 3a eingeklappt oder in Richtung des Balkenelements 4 ausgeklappt werden. Im ausgeklappten Zustand stabilisiert das Abstützelement 14 die Auflageelemente 12 bzw. den Sitz 3a bezüglich des Balkenelements 4. Hierfür weist das Abstützelement 14 zwei abragende Stifte auf, die im ausgeklappten Zustand des Abstützelements 12 jeweils auf einer Strebe 11 des Balkenelements 4 aufliegen. Im eingeklappten Zustand verringert sich die Sitzhöhe des erfindungsgemäßen Stuhls 1, da das Sitzelement 3 soweit abgesenkt werden kann, bis die Auflageelemente 12 direkt auf dem Stützkreuz 7, insbesondere direkt auf dem Begrenzungselement 10, aufliegen. Dies ist in 6, welche eine axonometrische Ansicht der zweiten Ausführungsvariante des erfindungsgemäßen Stuhls 1 mit eingeklapptem Abstützelement 14 zeigt, und in 7, welche eine Seitenansicht von rechts mit eingeklapptem Abstützelement 14 darstellt, gut sichtbar. In dieser Ausführungsvariante liegt die minimale Sitzhöhe des erfindungsgemäßen Stuhls 1 mit eingeklapptem Abstützelement 14 bei ca. 35 cm, während die maximale Sitzhöhe ca. 60 cm beträgt.
• - Die Lehne 3b umfasst ein entlang ihrer Längsrichtung angeordnetes Trägerelement 15. Des Weiteren weisen die beiden Streben 11 im zweiten Abschnitt 18 des Balkenelements 4 jeweils sechs Durchgangsöffnungen 16, die jeweils paarweise zueinander angeordnet sind, auf, wobei jeweils durch ein Paar der Durchgangsöffnungen ein Bolzen 17 durchführbar ist, welcher dem Trägerelement 15 als Stütze dient. Abhängig davon, durch welche der Durchgangsöffnungen 16 der Bolzen 17 durchgeführt ist, kann das Sitzelement 3 entsprechend weit abgesenkt werden - vgl. bspw. 4 mit 7. In 4 ist das Sitzelement 3 im Vergleich zu 7 höher angeordnet, weshalb der Bolzen 17 durch die untersten der Durchgangsöffnungen 16 geführt ist. In 7 wiederum ist das Sitzelement 3 niedriger angeordnet (Abstützelement 14 ist eingeklappt), weshalb der Bolzen 17 durch die vierthöchsten Durchgangsöffnungen 16 geführt ist.

3 shows an axonometric view of a second embodiment variant of the chair 1 according to the invention with the support element 14 folded out, while 4 represents a side view from the right of this embodiment variant. Although the second embodiment variant essentially corresponds to the first embodiment variant, it differs from the first embodiment variant in the following ways:

• - In the second embodiment variant, the locking element 9 has a rack 9a and a locking element 9b, the rack 9a being connected to the first section 5 of the beam element 4 and the locking element 9b being connected to the first section 5 of the support cross 7. Both rack 9a and locking element 9b are made of steel in the second embodiment variant. In order to adjust and fix the relative position between the beam element 4 and the support cross 7 in this embodiment variant, the locking element 9b must be brought into engagement with the rack 9a.
• - The beam element 4 comprises two struts 11 and the support structure 2 has a projection 10a directed into the receiving opening 8, which is arranged between the two struts 11. The projection 10a therefore projects into the receiving opening 8 and, in this embodiment variant, extends from the limiting element 10 to the area of the overleaf. The projection 10a serves to stabilize the support structure 2.
• - The seat element 3 further comprises a support element 14, which is arranged between the two support elements 12 on that side of the seat 3a that faces away from the backrest 3b and is movably connected to the two support elements 12. The support element 14 is foldable and can either be folded in the direction of the seat 3a or folded out in the direction of the beam element 4. In the unfolded state, the support element 14 stabilizes the support elements 12 or the seat 3a with respect to the beam element 4. For this purpose, the support element 14 has two projecting pins, which each rest on a strut 11 of the beam element 4 in the unfolded state of the support element 12. In the folded state, the seat height of the chair 1 according to the invention is reduced, since the seat element 3 can be lowered until the support elements 12 rest directly on the support cross 7, in particular directly on the limiting element 10. This is in 6 , which shows an axonometric view of the second embodiment variant of the chair 1 according to the invention with the support element 14 folded in, and in 7 , which represents a side view from the right with the support element 14 folded in, clearly visible. In this embodiment variant, the minimum seat height of the chair 1 according to the invention with the folded support element 14 is approximately 35 cm, while the maximum seat height is approximately 60 cm.
• - The backrest 3b comprises a support element 15 arranged along its longitudinal direction. Furthermore, the two struts 11 in the second section 18 of the beam element 4 each have six through openings 16, which are each arranged in pairs to one another, with a bolt passing through a pair of the through openings 17 can be carried out, which serves as a support for the support element 15. Depending on which of the through openings 16 the bolt 17 is passed through, the seat element 3 can be lowered accordingly - cf., for example. 4 with 7 . In 4 is the seat element 3 compared to 7 arranged higher, which is why the bolt 17 is guided through the lowest of the through openings 16. In 7 In turn, the seat element 3 is arranged lower (support element 14 is folded), which is why the bolt 17 is guided through the fourth highest through openings 16.

5 shows a side view from the right of the second embodiment variant of three chairs 1 according to the invention, each with the support element 14 folded out and different seat inclinations, with an angle between the seat 3a and the backrest 3b being left the same - that is, the relative position between the seat 3a and the backrest 3b was not changed. As a result, an angle between the backrest 3b and the beam element 4 is also the same in these three chairs 1 according to the invention - that is, the relative position of the backrest 3b and the beam element 4 does not change.

In 5 It can be clearly seen that the seat inclination changes depending on the relative position of the beam element 4 to the support cross 7. With a small angle α between the beam element 4 and the support cross 7, the seat 3a is horizontal in this embodiment variant (left illustration of 5 ). As the angle α increases, the seat 3a tilts further and further backwards (middle and right representation of the 5 ), whereby the relative position of beam element 4 and support cross 7 is adjusted by means of the locking element 9, in particular by means of the rack 9a and the locking element 9b.

8th shows an axonometric view of the second embodiment variant of the chair 1 according to the invention with the support element 14 folded out and the backrest 3b folded in, while 9 a rear view and 10 represents a side view of this embodiment variant. In 8th until 10 the backrest 3b is folded down in such a way that the support element 15 is arranged between the two struts 11 of the beam element 4. This is possible because the backrest 3b and seat 3a are movably connected to one another - that is, the corresponding connection can be released and fixed again after the backrest 3b has been folded down.

Ie in 8th until 10 the chair 1 according to the invention is shown as a stool. Of course, it would also be possible for the chair 1 according to the invention to be designed as a stool completely without a backrest 3b - that is, without a folded-down backrest 3b.

The bolt 17 is arranged in the highest, i.e. in the sixth, through openings 16 and serves as a stop element, which limits displacement of the seat element 3. That is, this prevents the seat element 3 from being pushed down by the beam element 4.

11 shows a schematic axonometric view of a third embodiment of the chair 1 according to the invention with the backrest 3b folded out, wherein the support cross 7 in this embodiment, in comparison to the first and second embodiments, additionally comprises a connecting element 13 with which the two legs 6 in the first section 5 are connected, whereby the stability of the support cross 7 is further increased. The beam element 4 is guided through the receiving opening 8 in sections and is rotatably mounted therein, wherein the rotatable mounting enables the relative positioning of the beam element 4 with respect to the support cross 7. In this embodiment, the support cross 7 rests on the ground with the edge region 5a of the first section 5 of the support cross 7, in particular with the connecting element 13. In addition, the limiting element 10 also rests on the ground.

In the third embodiment variant, the chair 1 according to the invention also includes a seat 3a and a backrest 3b, the seat 3a resting on two support elements 12 (see 12 ) is arranged. The two support elements 12 are slidably mounted on the beam element 4, whereby a seat height can be adjusted quickly and easily. In this version, the minimum seat height is approx. 30 cm, while the maximum seat height is approx. 65 cm.

In the third embodiment variant, the support element 14 is folded out, the beam element 4 comprises two struts 11 and the support structure 2 has a projection 10a directed into the receiving opening 8, which is arranged between the two struts 11. The projection 10a therefore projects into the receiving opening 8 and serves to stabilize the support structure 2.

In order to enable a substantially continuous adjustment of the relative position between the beam element 4 and the support cross 7, in the third exemplary embodiment the locking element 9 is a gas pressure spring 19. This is in 12 , which represents a schematic side view from the right of the third embodiment variant, and in 13 , which also shows a schematic side view from the right of the third embodiment variant, is clearly visible. In addition to the infinitely variable adjustability, the advantage of the gas pressure spring 19 is that the chair 1 according to the invention can be used as a rocking chair when the gas pressure spring 19 is open.

The chair 1 according to the invention of the third embodiment variant is in the 12 and 13 each shown with a different seat inclination. In both figures, the support elements 12 rest on a bolt by means of which the gas pressure spring 19 is attached to the beam element 4, and the seat element 3 is therefore in the lowest possible position in this embodiment variant. From the 12 and 13 It can be clearly seen that the seat inclination changes depending on the relative position of the beam element 4 to the support cross 7. At a small angle α ( 13 ), the seat 3a is horizontal, while increasing the angle α ( 12 ) the seat 3a tilts further and further backwards, with the relative position of the beam element 4 and the support cross 7 being adjusted by means of the gas pressure spring 19.

In the third embodiment variant, the backrest 3b has two slatted elements 22 (see 11 ) and a guide element 20, wherein the guide element 20 comprises a through slot 21 arranged in the longitudinal direction and is arranged between the two struts 11 of the beam element 4. The guide element 20 is rotatably connected at one end to that end of the slat elements 22, which end of the slat element 22 is furthest away from the seat 3a, and serves to guide and stabilize the backrest 3b, in particular when the inclination of the seat surface changes.

The two struts 11 each include a through opening 16, which two through openings 16 are arranged aligned with one another. Both through the through openings 16 and through the sections between the passages A bolt 17, which has an eccentric lever on one side, can be guided through the slot 21 located in the passage openings 16. In the 11 , 12 and 13 the bolt 17 is passed through both the through openings 16 and through the through slot 21, while the bolt 17 is in the 14 and 15 is only guided through the through openings 16 (see below).

Depending on the angle between the support elements 12 and the backrest 3b, in particular between the support elements 12 and the slat elements 22, the relative position between the guide element 20 and the struts 11 also changes. If the angle between the support elements 12 and the backrest 3b is larger ( 12 ), that is, with a backrest 3b that is inclined further back, the guide element 20 is almost parallel to the struts 11 (very small angle between the struts 11 and the guide element 20), while with a smaller angle between the support elements 12 and the backrest 3b ( 12 ), that is, with a backrest 3b that is inclined further forward, the guide element is clearly spaced in sections from the struts 11 ((significantly) increased angle between the struts 11 and the guide element 20).

The seat height of the chair 1 according to the invention is also fixed by means of the guide element 20, the struts 11 and the bolt 17 including the eccentric lever. By closing the eccentric lever of the bolt 17, which is guided at least through the two through openings 16, the two struts 11 are pressed against the guide element 20, so that the seat 3a is correspondingly fixed.

14 and 15 each represent a schematic view of the third embodiment variant with the backrest 3b folded in. In the third embodiment variant, the backrest 3b is pivotally connected to the two support elements 12 about an axis of rotation, which means that the chair 1 can be used particularly flexibly. It can be between a stool state ( 14 and 15 ) and an armchair state ( 12 and 13 ) can be varied. The chair 1 can be transferred from the armchair state to the stool state and back again by folding the backrest 3b around the axis of rotation (whereby the bolt 17 must be removed during the transfer).

Im in the 14 and 15 In the stool state shown, the backrest 3b is oriented from the seat 3a in the direction of the ground in such a way that the backrest 3b rests in sections on the first section 5 of the support cross 5, in particular on that area of the legs 6 which is arranged in the first section 5. Ie the backrest 3b serves as a support for the seat 3a, in particular the support elements 12.

• - Öffnen des Exzenterhebels und Entfernen des Bolzens 17;
• - ggf. Verschieben des Sitzes 3a entlang des Balkenelements 4 in eine höchste Position;
• - ggf. Ausrichten der Sitzfläche, sodass die Sitzfläche im Wesentlichen parallel zu einem Untergrund angeordnet ist,
• - Umklappen der Lehne 3b, insbesondere Umklappen der Lattenelemente 22 und des Führungselements 20, bis die Lehne 3b am ersten Abschnitt 5 des Stützkreuzes 7 aufliegt;
• - Abschnittweises Anordnen des Führungselements 20 zwischen den Streben 11;
• - Durchführen des Bolzens 17 durch die Durchgangsöffnungen 16 der Streben 11 und Schließen des Exzenterhebels, um die Streben 11 gegen das Führungselement 20 zu pressen.

In order to convert the chair 1 from the armchair state to the stool state, the following steps must be carried out:

• - Open the eccentric lever and remove bolt 17;
• - If necessary, moving the seat 3a along the beam element 4 to a highest position;
• - if necessary, aligning the seat so that the seat is arranged essentially parallel to a surface,
• - folding down the backrest 3b, in particular folding over the slat elements 22 and the guide element 20, until the backrest 3b rests on the first section 5 of the support cross 7;
• - Arranging the guide element 20 in sections between the struts 11;
• - Passing the bolt 17 through the through openings 16 of the struts 11 and closing the eccentric lever in order to press the struts 11 against the guide element 20.

In this context, it should be noted that the procedural steps mentioned above do not necessarily have to be carried out in this order.

By arranging the guide element 20 in sections between the struts 11 and passing the bolt 17 through the through holes 16 of the struts 11 and closing the eccentric lever to press the struts 11 against the guide element 20, an unintentional pivoting of the backrest 3b in the squatting state is prevented.

REFERENCE SYMBOL LIST

1

Chair

2

Support structure

3

Seat element

3a

Seat

3b

rest

4

Beam element

5

first section

5a

Edge area

6

leg

7

Support cross

8th

Recording opening

9

Locking element

9a

Rack

9b

Locking element

9c

Release bolt

10

Limiting element

10a

head Start

11

strut

12

Support element

13

connecting element

14

Support element

15

Support element

16

Through openings

17

bolt

18

second part

19

Gas spring

20

Leadership element

21

passage slot

22

slatted element

α

Angle between beam element 4 and support cross 7

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 4705250 A [0004]
• EP 0442832 A1 [0004]

Claims (19)

Chair (1) comprising a support structure (2) and a seat element (3) carried by the support structure (2), the support structure (2) comprising a support cross (7) having at least two legs (6) and a beam element (4), which support cross (7) and/or which beam element (4) can each be arranged on a surface with an edge region (5a) of a first section (5), the beam element (4) being connected to the seat element (3), characterized in that in that the at least two legs (6) of the support cross (7) are connected to a limiting element (10) in a second section (18) opposite the first section (5), whereby one through the limiting element (10) and the at least two legs (6) forms a limited receiving opening (8), through which receiving opening (8) the beam element (4) is carried out at least in sections and is mounted displaceably or rotatably in this receiving opening (8) in order to ensure a relative positioning of the beam element (4) with respect to the support cross ( 7), and that the support structure (2) further comprises an adjustable locking element (9), which locking element (9) engages on the support cross (7) and on the beam element (4) in order to achieve at least two different relative positions between the beam element (4 ) and support cross (7) to be adjusted and fixed. chair (1). Claim 1 , characterized in that the support cross (7) further comprises a connecting element (13), the at least two legs (6) in the first section (5) of the support cross (7) being connected to the connecting element (13). Chair (1) according to one of the Claims 1 until 2 , characterized in that the locking element (9) comprises a gas pressure spring (19) in order to adjust and fix the relative position essentially continuously. Chair (1) according to one of the Claims 1 until 2 , characterized in that the locking element (9) has a rack (9a) and a locking element (9b), the rack (9a) being connected to the beam element (4) or to the support cross (7) and the locking element (9b) is connected to the support cross (7) or to the beam element (4), the rack (9a) being able to be brought into engagement with the locking element (9b) in order to adjust and fix the relative position. Chair (1) according to one of the Claims 1 until 2 , characterized in that the locking element (9) comprises a release bolt (9c), wherein the limiting element (10) has a through opening through which the release bolt (9c) can be passed and brought into engagement with the beam element (4). Chair (1) according to one of the Claims 1 until 5 , characterized in that the two legs (6) of the support cross (7) are connected to one another by means of a leaf connection, in particular by means of sheeting. Chair (1) according to one of the Claims 1 until 6 , characterized in that the beam element (4) comprises two struts (11) at least in sections, and that the support structure (2) comprises a projection (10a), which projection (10a) is directed from the limiting element (10) into the receiving opening (8). is, wherein the projection (10a) is arranged at least in sections between the two struts (11) in order to stabilize the beam element (4). Chair (1) according to one of the Claims 1 until 7 , characterized in that the seat element (3) is mounted on the beam element (4) so as to be displaceable in the longitudinal direction of the beam element (4). chair (1). Claim 8 , characterized in that the beam element (4) has a stop element arranged in the second section (18) in order to limit displacement of the seat element (3). Chair (1) according to one of the Claims 8 until 9 , characterized in that the seat element (3) has a seat (3a) arranged on at least one support element (12), the seat (3a) being slidably mounted on the beam element (4) by means of the at least one support element (12). chair (1). Claim 10 , characterized in that the at least one support element (12) can be brought into engagement with the beam element (4). Chair (1) according to one of the Claims 10 or 11 , characterized in that the seat element (3) comprises at least one support element (14), which at least one support element (14) is movably connected to the at least one support element (12) and can be arranged in such a way as to support the support element (12) on the beam element ( 4) to support. Chair (1) according to one of the Claims 10 until 12 , characterized in that the seat element (3) has two support elements (12), wherein the beam element (4) can be clamped between the two support elements (12). Chair (1) according to one of the Claims 10 until 13 , characterized in that the seat element (3) has at least one backrest (3b) connected to the at least one support element (12) or to the seat (3a). chair (1). Claim 14 and after Claim 7 , characterized in that the backrest (3b) comprises a support element (15) arranged along a longitudinal direction of the backrest (3b) and that the at least two struts (11) each have at least two, preferably several, through openings (16), the through openings (16) in which at least two struts (11) are arranged in pairs with one another, so that a bolt (17) can be passed through, on which bolt (17) the support element (15) can be supported. chair (1). Claim 7 and after Claim 14 , characterized in that the backrest (3b) comprises a guide element (20) with a through slot (21) arranged in the longitudinal direction of the guide element (20), and in that the at least two struts (11) each have at least one through opening (16), which Through openings (16) are arranged relative to one another in such a way that a bolt (17) can be guided through the through openings (16) and through the through slot (21). chair (1). Claim 10 and after Claim 16 , characterized in that the backrest (3b) is pivotally connected to the at least one support element (12) about an axis of rotation, the chair (1) being able to be converted from an armchair state into a stool state by pivoting the backrest (3b) about the axis of rotation, wherein the backrest (3b) in the stool state is oriented at least in sections from the seat (3a) towards the ground. chair (1). Claim 17 , characterized in that the backrest (3b) is arranged in the stool state in such a way that the backrest (3b) serves as a support for the at least one support element (12), in that the backrest (3b) rests at least in sections on the first section (5). Chair (1) according to one of the Claims 14 until 16 , characterized in that the seat (3a) and the at least one backrest (3b) are formed in one piece.

Images