EP3824766A1 - Seating - Google Patents

Seating Download PDF

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Publication number
EP3824766A1
EP3824766A1 EP20208304.4A EP20208304A EP3824766A1 EP 3824766 A1 EP3824766 A1 EP 3824766A1 EP 20208304 A EP20208304 A EP 20208304A EP 3824766 A1 EP3824766 A1 EP 3824766A1
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EP
European Patent Office
Prior art keywords
spring structure
hinge axis
seating furniture
seat
rear hinge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20208304.4A
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German (de)
French (fr)
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EP3824766B1 (en
Inventor
Yannick OSTER
Carsten Gehner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wilkhahn Wilkening and Hahne GmbH and Co KG
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Wilkhahn Wilkening and Hahne GmbH and Co KG
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Publication of EP3824766A1 publication Critical patent/EP3824766A1/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03277—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with bar or leaf springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/445—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with bar or leaf springs

Definitions

  • the invention relates to a piece of seating furniture which can be pivoted at least from an upright basic position into a reclined position and vice versa.
  • Seating furniture of this type is used in particular as office chairs and has what is known as a synchronous mechanism in which the backrest and seat pivot at the same time, the pivoting angle of the backrest usually being set about twice as large as the pivoting lever of the seat.
  • Most of the synchronous mechanisms known on the market however, have a relatively large number of swivel or swivel joints.
  • Seating furniture has a support structure, a seat and a backrest arranged on a support arm, the seat being supported on a spiral spring connected to the support arm, which is arranged so that it can be elastically deflected transversely to its longitudinal extent when the seat is loaded is.
  • the seat is connected at its front end to the support structure via an approximately vertically extending slot on the support structure and a substantially horizontally extending slot on the seat, a shaft being passed through the two slots, which is located in the area of the free end of the spiral spring on this rests.
  • the spiral spring takes on the function of an energy store, by which a reclining movement defined by further hinge points is cushioned.
  • the seat of this office chair is lifted through the vertically aligned elongated hole on the support structure.
  • the DE 1 297 306 A discloses a tilting chair with a support part and a seat part pivotally connected to this by articulated means using a leaf spring, the rear end of the leaf spring being supported on the seat part, while the front end of the leaf spring is connected to the support part via a device for adjusting the spring tension .
  • the support part also has a pivotable stop which supports the leaf spring in a central area and causes the spring to bend when the spring is loaded.
  • a chair with a leaf spring is still out of the way DE 103 19 316 A1 known, wherein the leaf spring is pivotally mounted in a central area on a support unit and a seat is supported on the leaf spring at the front and rear ends. In the rear area, the seat is articulated to a connecting arm which is pivotably articulated to the support unit and which supports the backrest.
  • the invention is based on the object of creating a piece of furniture that realizes the function of the synchronous mechanism with a relatively small number of components.
  • the object is achieved by a piece of seating furniture with a support structure, a seat, a backrest and a spring structure, the spring structure forming a kinematic unit with the backrest and the seat being connected to the spring structure.
  • the spring structure is pivotably mounted in a central area about a rear hinge axis on the support structure and has a front hinge axis in a front area, which is movably supported on the support structure, so that the seating furniture at least tilts back from an upright basic position around the rear hinge axis Position is pivotable.
  • the spring structure is L-shaped in a side view, an essentially horizontally extending limb being provided for connecting the seat and an upwardly extending limb for connecting or forming the backrest.
  • the front and rear hinge axes are firmly connected to the spring structure, the front hinge axis being movably supported in a guide on the support structure and the guide being oriented in such a way that when the chair is pivoted from the upright basic position to the reclined position and vice versa a change in the distance between the two joint axes and a resulting elastic deformation of the spring structure results.
  • the spring structure is designed in the manner of a leaf spring at least in the area between the front and the rear hinge axis, but preferably over its entire length.
  • the leaf spring thus not only takes on the function of an energy store, but also the function of lifting kinematics, which in other product examples is implemented via a corresponding four-link chain ( DE 10 2014 103 780 B3 ).
  • the guide can in particular be formed by a link, a slot or a groove, the front joint axis being in a central position in the guide in the upright basic position and in a first end position in the tilted back position.
  • the seating furniture can then also assume a forwardly inclined position in which the front joint axis is in the other end position in the guide.
  • the seat is held on the spring structure via front seat connection means and rear seat connection means.
  • the front seat connection means can preferably be connected to the spring structure between the front and the rear hinge axis and the rear seat connection means behind the rear hinge axis.
  • the spring structure forms an arch with an apex between the front and rear joint axes. It has proven to be particularly advantageous if the front seat connection means are connected to the spring structure in front of or on the apex of the arching arch in order to ensure an optimal lifting of the front area of the seat when leaning back.
  • the rear hinge axis is mounted on the support structure in a laterally tiltable manner in order to realize a lateral pivotability of the chair.
  • This can take place in particular in that the rear hinge axis is mounted centrally on the support structure.
  • a convexly curved roll-off track is provided on the support structure, on which the rear hinge axis rolls when the chair moves sideways.
  • FIG. 1 Seating furniture shown in its upright basic position consists essentially of a support structure 1, a seat 2, a backrest 3 and a spring structure 4, the spring structure 4 forming a kinematic unit with the backrest 3 and the seat 2 being connected to the spring structure 4.
  • the spring structure 4 is mounted on the support structure 1 so as to be pivotable about a rear hinge axis 5 in a central region.
  • the spring structure 4 has a front hinge axis 6 in a front area, which is movably supported on the support structure 1.
  • the seating is from the in Fig. 1 upright basic position shown around the rear joint axis 5 in the in Fig. 2 shown tilted back position.
  • the two joint axes 5, 6 are firmly connected to the spring structure 4.
  • the front hinge axis 6 is movably supported in a guide 7 attached to the support structure 1.
  • the guide 7 is designed, for example, in the manner of a link, a slot or a groove in which the front hinge axis 6 is displaceably guided.
  • the guide 7 is slightly curved in the illustrated embodiment, but could in principle also be aligned straight. In any case, it is aligned so that the distance between the rear hinge axis 5 and the front hinge axis 6 differs from the one shown in FIG Fig. 1 shown upright basic position when leaning back in the in Fig. 2 shown leaning back position shortened. This is made possible by the fact that the spring structure 4 forms an increasing arching arc 8 with an apex between the front and rear joint axes 6, 5 when it is tilted back.
  • the seat 2 is held on the spring structure via front seat connection means 10 and rear seat connection means 11, the front seat connection means 10 preferably being connected to the spring structure between the front and rear hinge axes 6, 5 and the rear seat connection means 11 behind the rear hinge axis 5.
  • the front seat connection means 10 are in particular connected to the spring structure 4 in front of or on the apex 9 of the arch 8, as a result of which the front area of the seat 2 is lifted when tilting back.
  • the spring structure 4 is essentially L-shaped, the essentially horizontal leg being provided for connecting the seat 2, while the upwardly extending leg is provided for connecting or forming the backrest 3.
  • the backrest 3 can thus directly on the Spring structure 4 can be formed or is fastened to the spring structure 4 via suitable holding means.
  • the spring structure 4 is preferably designed as a leaf spring and is dimensioned such that the angle between the seat 2 and the backrest 3 when leaning back into the reclined position according to FIG Fig. 2 enlarged in order to set the desired synchro-ratio.
  • the angle of the backrest changes between the positions according to FIGS. 1 and 2 about twice as strong as the angle of the seat 2.
  • the guide 7 is designed in such a way that the front hinge axis 6 is in the upright basic position according to FIG Fig. 1 in a central position in the guide 7 and in the reclined position according to FIG Fig. 2 is in a first end position.
  • the seating furniture can be brought into a forward-inclined position, as in FIG Fig. 3 is shown.
  • the front joint axis assumes the other end position in the guide 7. This is achieved in that the leaf spring 4 in the upright basic position according to FIG Fig. 1 between the two joint axes 5, 6 also already forms a slight arching arc, which is then in the position according to FIG Fig. 3 is further flattened.
  • FIGS. 1 to 3 The position shown by the guideway of the guide 7 is decisively influenced.
  • the elasticity of the spring structure 4 and the location where the front seat connection means 10 and the rear seat connection means 11 are connected to the spring structure also have a great influence on the synchronous movement.
  • the front and rear seat connection means 10, 11 are each present in pairs and are attached to the side of the spring structure 4, which is designed as a leaf spring.
  • both the seat 2 can be provided with a suitable seat pad 12 and the backrest 3 can be provided with a backrest pad 13.
  • the support structure 1 also has one or more feet in the usual manner. When using a central column, this is usually telescopic and supports itself with a base 14 on the floor.
  • the seat 2 provides a seat frame on which the seat support 12 is stretched in a self-supporting manner.
  • the chair can be swiveled to the side in that the rear hinge axis 5 is mounted on the support structure 1 so that it can be tilted laterally.
  • the rear hinge axis 5 is preferably held centrally on the support structure 1, as shown in FIGS. 6 and 7 emerges.
  • a convexly curved roll-off track 15 is provided on the support structure 1, on which the rear hinge axis 5 is centrally mounted. So that the rear hinge axis 5 does not slip laterally, a toothed strip 16, for example, is applied to the roll-off track and engages with a toothed area 5a on the rear hinge axis 5.
  • the rear hinge axis 5 is also held in position in the longitudinal direction of the chair by a housing 17 in order to prevent the toothed area of the rear shaft 5 from disengaging from the toothed strip 16.
  • the momentary pivot point moves outwards when the chair is tilted to the side, which enables the chair to move laterally.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Abstract

Die Erfindung betrifft ein Sitzmöbel mit einer Tragstruktur (1), einem Sitz (2), einer Rückenlehne (3) und einer Federstruktur (4), wobei die Federstruktur (4) mit der Rückenlehne (3) eine kinematische Einheit bildet und der Sitz (2) mit der Federstruktur (4) verbunden ist und wobei ferner die Federstruktur (4) in einem Mittelbereich um eine hintere Gelenkachse (5) an der Tragstruktur (1) verschwenkbar gelagert ist und in einem vorderen Bereich eine fest mit der Federstruktur (4) verbundene, vordere Gelenkachse (6) aufweist, die in einer Führung (7) beweglich an der Tragstruktur (1) gehaltert ist, sodass das Sitzmöbel zumindest von einer aufrechten Grundstellung um die hintere Gelenkachse (5) in eine zurückgeneigte Stellung verschwenkbar ist. Die Federstruktur (4) ist in einer Seitenansicht L-förmig ausgebildet ist, wobei ein im Wesentlichen horizontal verlaufender Schenkel zur Anbindung des Sitzes und ein sich nach oben erstreckender Schenkel zur Anbindung oder Ausbildung der Rückenlehne vorgesehen sind und auch die hintere Gelenkachse (5) fest mit der Federstruktur (4) verbunden ist, wobei die Führung (7) der vorderen Gelenkachse (6) so ausgerichtet ist, dass sich beim Verschwenken des Sitzmöbels von der aufrechten Grundstellung in die zurückgeneigte Stellung und umgekehrt eine Veränderung des Abstandes der beiden Gelenkachsen (5, 6) und eine dadurch bedingte elastische Verformung der Federstruktur (4) ergibt.The invention relates to seating furniture with a support structure (1), a seat (2), a backrest (3) and a spring structure (4), the spring structure (4) forming a kinematic unit with the backrest (3) and the seat ( 2) is connected to the spring structure (4) and furthermore the spring structure (4) is mounted pivotably in a central area about a rear hinge axis (5) on the support structure (1) and in a front area a fixed to the spring structure (4) connected, front hinge axis (6), which is movably supported in a guide (7) on the support structure (1) so that the seating furniture can be pivoted at least from an upright basic position about the rear hinge axis (5) into a reclined position. The spring structure (4) is L-shaped in a side view, with an essentially horizontally extending limb for connecting the seat and an upwardly extending limb for connecting or forming the backrest, and the rear hinge axis (5) is also fixed is connected to the spring structure (4), the guide (7) of the front hinge axis (6) being aligned in such a way that when the chair is pivoted from the upright basic position to the reclined position and vice versa, the distance between the two hinge axes (5 , 6) and a resulting elastic deformation of the spring structure (4) results.

Description

Die Erfindung betrifft ein Sitzmöbel, das zumindest von einer aufrechten Grundstellung in eine zurückgeneigte Stellung und umgekehrt verschwenkbar ist.The invention relates to a piece of seating furniture which can be pivoted at least from an upright basic position into a reclined position and vice versa.

Derartige Sitzmöbel kommen insbesondere als Bürostühle zum Einsatz und weisen eine sogenannte Synchronmechanik auf, bei der ein gleichzeitiges Verschwenken von Rückenlehne und Sitz stattfindet, wobei der Schwenkwinkel der Rückenlehne üblicherweise etwa doppelt so groß wie der Schwenkhebel des Sitzes eingestellt wird. Die meisten auf dem Markt bekannten Synchronmechaniken weisen jedoch eine relativ hohe Anzahl an Dreh- oder Schwenkgelenken auf.Seating furniture of this type is used in particular as office chairs and has what is known as a synchronous mechanism in which the backrest and seat pivot at the same time, the pivoting angle of the backrest usually being set about twice as large as the pivoting lever of the seat. Most of the synchronous mechanisms known on the market, however, have a relatively large number of swivel or swivel joints.

Aus der EP 1 989 963 B1 ist ein Sitzmöbel bekannt, dass eine Tragstruktur, einen Sitz und eine an einem Trägerarm angeordnete Rückenlehne aufweist, wobei sich der Sitz an einer mit dem Trägerarm verbundenen Biegefeder abstützt, die so angeordnet ist, dass sie bei Belastung des Sitzes transversal zu ihrer Längserstreckung elastisch auslenkbar ist. Der Sitz ist an seinem vorderen Ende mit der Tragstruktur über ein etwa vertikal verlaufendes Langloch an der Tragstruktur und ein im Wesentlichen horizontal verlaufendes Langloch am Sitz verbunden, wobei eine Welle durch die beiden Langlöcher hindurchgeführt ist, welche im Bereich des freien Endes der Biegefeder auf dieser aufliegt. Die Biegefeder übernimmt dabei die Funktion eines Kraftspeichers, durch den eine durch weitere Gelenkpunkte definierte Zurücklehnbewegung abgefedert wird. Das Anheben des Sitzes erfolgt bei diesem Bürostuhl durch das vertikal ausgerichtete Langloch an der Tragstruktur.From the EP 1 989 963 B1 Seating furniture is known that has a support structure, a seat and a backrest arranged on a support arm, the seat being supported on a spiral spring connected to the support arm, which is arranged so that it can be elastically deflected transversely to its longitudinal extent when the seat is loaded is. The seat is connected at its front end to the support structure via an approximately vertically extending slot on the support structure and a substantially horizontally extending slot on the seat, a shaft being passed through the two slots, which is located in the area of the free end of the spiral spring on this rests. The spiral spring takes on the function of an energy store, by which a reclining movement defined by further hinge points is cushioned. The seat of this office chair is lifted through the vertically aligned elongated hole on the support structure.

Die DE 1 297 306 A offenbart einen Kippstuhl mit einem Tragteil und einem mit diesem durch gelenkige Mittel schwenkbar verbundenen Sitzteil unter Verwendung einer Blattfeder, wobei das hintere Ende der Blattfeder am Sitzteil abgestützt ist, während das vordere Ende der Blattfeder über einen Einrichtung zur Einstellung der Federspannung mit dem Tragteil verbunden ist. Das Tragteil weist ferner einen schwenkbaren Anschlag auf, welcher die Blattfeder in einem mittleren Bereich abstützt und bei Belastung der Feder eine Durchbiegung derselben bewirkt.The DE 1 297 306 A discloses a tilting chair with a support part and a seat part pivotally connected to this by articulated means using a leaf spring, the rear end of the leaf spring being supported on the seat part, while the front end of the leaf spring is connected to the support part via a device for adjusting the spring tension . The support part also has a pivotable stop which supports the leaf spring in a central area and causes the spring to bend when the spring is loaded.

Ein Stuhl mit einer Blattfeder ist weiterhin aus der DE 103 19 316 A1 bekannt, wobei die Blattfeder in einem Mittelbereich schwenkbar an einer Trageinheit gehaltert ist und sich ein Sitz am vorderen und hinteren Ende auf der Blattfeder abstützt. Der Sitz ist im hinteren Bereich gelenkig mit einem schwenkbar an der Trageinheit angelenkten Verbindungsarm gekoppelt, der die Rückenlehne trägt.A chair with a leaf spring is still out of the way DE 103 19 316 A1 known, wherein the leaf spring is pivotally mounted in a central area on a support unit and a seat is supported on the leaf spring at the front and rear ends. In the rear area, the seat is articulated to a connecting arm which is pivotably articulated to the support unit and which supports the backrest.

Der Erfindung liegt die Aufgabe zugrunde, ein Sitzmöbel zu schaffen, das die Funktion der Synchronmechanik mit einer relativ geringen Anzahl an Bauteilen realisiert.The invention is based on the object of creating a piece of furniture that realizes the function of the synchronous mechanism with a relatively small number of components.

Erfindungsgemäß wird die Aufgabe durch ein Sitzmöbel mit einer Tragstruktur, einem Sitz, einer Rückenlehne und einer Federstruktur realisiert, wobei die Federstruktur mit der Rückenlehne eine kinematische Einheit bildet und der Sitz mit der Federstruktur verbunden ist. Ferner ist die Federstruktur in einem Mittelbereich um eine hintere Gelenkachse an der Tragstruktur verschwenkbar gelagert und weist in einem vorderen Bereich eine vordere Gelenkachse auf, die beweglich an der Tragstruktur gehaltert ist, sodass das Sitzmöbel zumindest von einer aufrechten Grundstellung um die hintere Gelenkachse in eine zurückgeneigte Stellung verschwenkbar ist. Die Federstruktur ist in einer Seitenansicht L-förmig ausgebildet ist, wobei ein im Wesentlichen horizontal verlaufender Schenkel zur Anbindung des Sitzes und ein sich nach oben erstreckender Schenkel zur Anbindung oder Ausbildung der Rückenlehne vorgesehen sind. Weiterhin sind die vordere und die hintere Gelenkachse fest mit der Federstruktur verbunden, wobei die vordere Gelenkachse in einer Führung beweglich an der Tragstruktur gehaltert ist und die Führung so ausgerichtet ist, dass sich beim Verschwenken des Sitzmöbels von der aufrechten Grundstellung in die zurückgeneigte Stellung und umgekehrt eine Veränderung des Abstands der beiden Gelenkachsen und eine dadurch bedingte elastische Verformung der Federstruktur ergibt.According to the invention, the object is achieved by a piece of seating furniture with a support structure, a seat, a backrest and a spring structure, the spring structure forming a kinematic unit with the backrest and the seat being connected to the spring structure. Furthermore, the spring structure is pivotably mounted in a central area about a rear hinge axis on the support structure and has a front hinge axis in a front area, which is movably supported on the support structure, so that the seating furniture at least tilts back from an upright basic position around the rear hinge axis Position is pivotable. The spring structure is L-shaped in a side view, an essentially horizontally extending limb being provided for connecting the seat and an upwardly extending limb for connecting or forming the backrest. Furthermore, the front and rear hinge axes are firmly connected to the spring structure, the front hinge axis being movably supported in a guide on the support structure and the guide being oriented in such a way that when the chair is pivoted from the upright basic position to the reclined position and vice versa a change in the distance between the two joint axes and a resulting elastic deformation of the spring structure results.

Durch dieses Konzept zeichnet sich die Mechanik des Stuhles durch eine sehr flache Bauart und eine reduzierte Anzahl an Bauteilen aus.With this concept, the mechanics of the chair are characterized by a very flat design and a reduced number of components.

Weitere Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Further refinements of the invention are the subject of the subclaims.

Gemäß einer bevorzugten Ausgestaltung der Erfindung ist die Federstruktur zumindest im Bereich zwischen der vorderen und der hinteren Gelenkachse, vorzugsweise aber in ihrer gesamten Länge nach Art einer Blattfeder ausgebildet.According to a preferred embodiment of the invention, the spring structure is designed in the manner of a leaf spring at least in the area between the front and the rear hinge axis, but preferably over its entire length.

Durch eine geschickte Anbindung des Sitzes an die Federstruktur kann die elastische Verformung der Federstruktur zum Anheben des Sitzes bei der Zurücklehnbewegung genutzt werden. Die Blattfeder übernimmt somit nicht nur die Funktion eines Kraftspeichers, sondern zusätzlich auch die Funktion einer Anhebekinematik, die bei anderen Produktbeispielen über eine entsprechende Vier-Gelenk-Kette realisiert wird ( DE 10 2014 103 780 B3 ). Die Führung kann insbesondere durch eine Kulisse, einen Schlitz oder eine Nut gebildet werden, wobei sich die vordere Gelenkachse in der aufrechten Grundstellung in einer Mittelstellung in der Führung und in der zurückgeneigten Stellung in einer ersten Endstellung befindet. Das Sitzmöbel kann dann ferner auch eine nach vorne geneigte Stellung einnehmen, in der sich die vordere Gelenkachse in der anderen Endstellung in der Führung befindet.By cleverly connecting the seat to the spring structure, the elastic deformation of the spring structure can be used to lift the seat during the leaning back movement. The leaf spring thus not only takes on the function of an energy store, but also the function of lifting kinematics, which in other product examples is implemented via a corresponding four-link chain ( DE 10 2014 103 780 B3 ). The guide can in particular be formed by a link, a slot or a groove, the front joint axis being in a central position in the guide in the upright basic position and in a first end position in the tilted back position. The seating furniture can then also assume a forwardly inclined position in which the front joint axis is in the other end position in the guide.

Es ist besonders vorteilhaft, wenn sich die durch die Veränderung des Abstandes der beiden Gelenkachsen bedingte elastische Verformung der Federstruktur eine Wölbung der Federstruktur im Sinne einer Anhebung des vorderen Bereichs des Sitzes ergibt.It is particularly advantageous if the elastic deformation of the spring structure caused by the change in the distance between the two joint axes results in a curvature of the spring structure in the sense of a lifting of the front area of the seat.

Gemäß einer weiteren Ausgestaltung der Erfindung wird der Sitz über vordere Sitzanbindungsmittel und hintere Sitzanbindungsmittel an der Federstruktur gehaltert. Dabei können die vorderen Sitzanbindungsmittel vorzugsweise zwischen der vorderen und der hinteren Gelenkachse und die hinteren Sitzanbindungsmittel hinter der hinteren Gelenkachse mit der Federstruktur verbunden werden. Die Federstruktur bildet in der zurückgeneigten Stellung einen Wölbungsbogen mit einem Scheitelpunkt zwischen der vorderen und der hinteren Gelenkachse aus. Dabei hat es sich als besonders vorteilhaft erwiesen, wenn die vorderen Sitzanbindungsmittel vor oder auf dem Scheitelpunkt des Wölbungsbogens mit der Federstruktur verbunden sind, um eine optimale Anhebung des vorderen Bereichs des Sitzes beim Zurücklehnen zu gewährleisten.According to a further embodiment of the invention, the seat is held on the spring structure via front seat connection means and rear seat connection means. The front seat connection means can preferably be connected to the spring structure between the front and the rear hinge axis and the rear seat connection means behind the rear hinge axis. In the reclined position, the spring structure forms an arch with an apex between the front and rear joint axes. It has proven to be particularly advantageous if the front seat connection means are connected to the spring structure in front of or on the apex of the arching arch in order to ensure an optimal lifting of the front area of the seat when leaning back.

Gemäß einer weiteren, optionalen Ausgestaltung der Erfindung ist die hintere Gelenkachse zur Realisierung einer seitlichen Schwenkbarkeit des Sitzmöbels seitlich kippbar an der Tragstruktur gelagert. Dies kann insbesondere dadurch erfolgen, dass die hintere Gelenkachse mittig an der Tragstruktur gelagert wird. Dabei wird beispielsweise an der Tragstruktur eine konvex gekrümmte Abrollbahn vorgesehen, auf welcher die hintere Gelenkachse bei einer seitlichen Schwenkbewegung des Sitzmöbels abrollt.According to a further, optional embodiment of the invention, the rear hinge axis is mounted on the support structure in a laterally tiltable manner in order to realize a lateral pivotability of the chair. This can take place in particular in that the rear hinge axis is mounted centrally on the support structure. For example, a convexly curved roll-off track is provided on the support structure, on which the rear hinge axis rolls when the chair moves sideways.

Weitere Ausgestaltungen der Erfindung werden anhand der nachfolgenden Beschreibung und der Zeichnung näher erläutert.Further embodiments of the invention are explained in more detail with reference to the following description and the drawing.

In der Zeichnung zeigen

Fig. 1
eine kinematische Darstellung des Sitzmöbels in der aufrechten Grundstellung,
Fig. 2
eine kinematische Darstellung des Sitzmöbels in der zurückgeneigten Stellung,
Fig. 3
eine kinematische Darstellung des Sitzmöbels in der nach vorne geneigten Stellung,
Fig. 4
eine schematische Seitenansicht des Sitzmöbels,
Fig. 5
eine schematische Draufsicht des Sitzmöbels,
Fig. 6
eine schematische Rückansicht des Sitzmöbels im Bereich der Lagerung der hinteren Gelenkachse und
Fig. 7
eine Schnittdarstellung längs der Linie A-A der Fig. 6.
Show in the drawing
Fig. 1
a kinematic representation of the chair in the upright basic position,
Fig. 2
a kinematic representation of the chair in the reclined position,
Fig. 3
a kinematic representation of the chair in the forward tilted position,
Fig. 4
a schematic side view of the chair,
Fig. 5
a schematic top view of the chair,
Fig. 6
a schematic rear view of the chair in the area of the mounting of the rear hinge axis and
Fig. 7
a sectional view along the line AA of the Fig. 6 .

Das in Fig. 1 in seiner aufrechten Grundstellung dargestellte Sitzmöbel besteht im Wesentlichen aus einer Tragstruktur 1, einem Sitz 2, einer Rückenlehne 3 und einer Federstruktur 4, wobei die Federstruktur 4 mit der Rückenlehne 3 eine kinematische Einheit bildet und der Sitz 2 mit der Federstruktur 4 verbunden ist. Die Federstruktur 4 ist in einem Mittelbereich um eine hintere Gelenkachse 5 an der Tragstruktur 1 verschwenkbar gelagert. Weiterhin weist die Federstruktur 4 in einem vorderen Bereich eine vordere Gelenkachse 6 auf, die beweglich an der Tragstruktur 1 gehaltert ist. Das Sitzmöbel ist von der in Fig. 1 gezeigten aufrechten Grundstellung um die hintere Gelenkachse 5 in die in Fig. 2 dargestellte zurückgeneigte Stellung verschwenkbar. Die beiden Gelenkachsen 5, 6 sind fest mit der Federstruktur 4 verbunden. Während die hintere Gelenkachse 5 ortsfest an der Tragstruktur 1 gelagert ist, ist die vordere Gelenkachse 6 in einer an der Tragstruktur 1 angebrachten Führung 7 beweglich gehaltert. Die Führung 7 ist beispielsweise nach Art einer Kulisse, einem Schlitz oder einer Nut ausgebildet, in der die vordere Gelenkachse 6 verschiebbar geführt ist. Die Führung 7 ist im dargestellten Ausführungsbeispiel leicht gekrümmt ausgebildet, könnte aber prinzipiell auch gerade ausgerichtet sein. In jedem Fall wird sie so ausgerichtet, dass sich der Abstand zwischen der hinteren Gelenkachse 5 und der vorderen Gelenkachse 6 von der in Fig. 1 dargestellten aufrechten Grundstellung beim Zurücklehnen in die in Fig. 2 gezeigte zurückgeneigte Stellung verkürzt. Dies wird dadurch ermöglicht, dass die Federstruktur 4 beim Zurückneigen einen zunehmenden Wölbungsbogen 8 mit einem Scheitelpunkt zwischen der vorderen und der hinteren Gelenkachse 6, 5 ausbildet.This in Fig. 1 Seating furniture shown in its upright basic position consists essentially of a support structure 1, a seat 2, a backrest 3 and a spring structure 4, the spring structure 4 forming a kinematic unit with the backrest 3 and the seat 2 being connected to the spring structure 4. The spring structure 4 is mounted on the support structure 1 so as to be pivotable about a rear hinge axis 5 in a central region. Furthermore, the spring structure 4 has a front hinge axis 6 in a front area, which is movably supported on the support structure 1. The seating is from the in Fig. 1 upright basic position shown around the rear joint axis 5 in the in Fig. 2 shown tilted back position. The two joint axes 5, 6 are firmly connected to the spring structure 4. While the rear hinge axis 5 is mounted in a stationary manner on the support structure 1, the front hinge axis 6 is movably supported in a guide 7 attached to the support structure 1. The guide 7 is designed, for example, in the manner of a link, a slot or a groove in which the front hinge axis 6 is displaceably guided. The guide 7 is slightly curved in the illustrated embodiment, but could in principle also be aligned straight. In any case, it is aligned so that the distance between the rear hinge axis 5 and the front hinge axis 6 differs from the one shown in FIG Fig. 1 shown upright basic position when leaning back in the in Fig. 2 shown leaning back position shortened. This is made possible by the fact that the spring structure 4 forms an increasing arching arc 8 with an apex between the front and rear joint axes 6, 5 when it is tilted back.

Der Sitz 2 ist über vordere Sitzanbindungsmittel 10 und hintere Sitzanbindungsmittel 11 an der Federstruktur gehaltert, wobei die vorderen Sitzanbindungsmittel 10 vorzugsweise zwischen der vorderen und der hinteren Gelenkachse 6, 5 und die hinteren Sitzanbindungsmittel 11 hinter der hinteren Gelenkachse 5 mit der Federstruktur verbunden sind. Die vorderen Sitzanbindungsmittel 10 sind insbesondere vor oder auf dem Scheitelpunkt 9 des Wölbungsbogens 8 mit der Federstruktur 4 verbunden, wodurch sich beim Zurückneigen ein Anheben des vorderen Bereichs des Sitzes 2 ergibt.The seat 2 is held on the spring structure via front seat connection means 10 and rear seat connection means 11, the front seat connection means 10 preferably being connected to the spring structure between the front and rear hinge axes 6, 5 and the rear seat connection means 11 behind the rear hinge axis 5. The front seat connection means 10 are in particular connected to the spring structure 4 in front of or on the apex 9 of the arch 8, as a result of which the front area of the seat 2 is lifted when tilting back.

Die Federstruktur 4 ist an sich im Wesentlichen L-förmig ausgebildet, wobei der im Wesentlichen horizontale Schenkel zur Anbindung des Sitzes 2 vorgesehen ist, während der sich nach oben erstreckende Schenkel zur Anbindung bzw. Ausbildung der Rückenlehne 3 vorgesehen ist. Die Rückenlehne 3 kann somit direkt an der Federstruktur 4 ausgebildet sein oder wird über geeignete Halterungsmittel an der Federstruktur 4 befestigt. Die Federstruktur 4 ist vorzugsweise als Blattfeder ausgebildet und ist so dimensioniert, dass sich der Winkel zwischen Sitz 2 und Rückenlehne 3 beim Zurücklehnen in die zurückgeneigte Stellung gemäß Fig. 2 vergrößert, um dadurch das gewünschte Synchronverhältnis einzustellen. Üblicherweise verändert sich der Winkel der Rückenlehne zwischen den Stellungen gemäß Fig. 1 und Fig. 2 etwa doppelt so stark wie der Winkel des Sitzes 2.The spring structure 4 is essentially L-shaped, the essentially horizontal leg being provided for connecting the seat 2, while the upwardly extending leg is provided for connecting or forming the backrest 3. The backrest 3 can thus directly on the Spring structure 4 can be formed or is fastened to the spring structure 4 via suitable holding means. The spring structure 4 is preferably designed as a leaf spring and is dimensioned such that the angle between the seat 2 and the backrest 3 when leaning back into the reclined position according to FIG Fig. 2 enlarged in order to set the desired synchro-ratio. Usually the angle of the backrest changes between the positions according to FIGS. 1 and 2 about twice as strong as the angle of the seat 2.

Im dargestellten Ausführungsbeispiel ist die Führung 7 so ausgebildet, dass sich die vordere Gelenkachse 6 in der aufrechten Grundstellung gemäß Fig. 1 in einer Mittelstellung in der Führung 7 und in der zurückgeneigten Stellung gemäß Fig. 2 in einer ersten Endstellung befindet. Darüber hinaus ist es aber auch möglich, dass das Sitzmöbel in eine nach vorne geneigte Stellung gebracht werden kann, wie das in Fig. 3 dargestellt ist. In dieser Stellung nimmt die vordere Gelenkachse die andere Endstellung in der Führung 7 ein. Dies wird dadurch erreicht, dass die Blattfeder 4 in der aufrechten Grundstellung gemäß Fig. 1 zwischen den beiden Gelenkachsen 5, 6 ebenfalls schon einen leichten Wölbungsbogen ausbildet, der dann in der Stellung gemäß Fig. 3 weiter abgeflacht ist. Letztendlich werden die in Fig. 1 bis Fig. 3 gezeigten Stellung durch die Führungsbahn der Führung 7 entscheidend beeinflusst. Darüber hinaus haben aber auch die Elastizität der Federstruktur 4 und dem Ort, wo die vorderen Sitzanbindungsmittel 10 und die hinteren Sitzanbindungsmittel 11 mit der Federstruktur verbunden sind, einen großen Einfluss auf die Synchronbewegung.In the exemplary embodiment shown, the guide 7 is designed in such a way that the front hinge axis 6 is in the upright basic position according to FIG Fig. 1 in a central position in the guide 7 and in the reclined position according to FIG Fig. 2 is in a first end position. In addition, however, it is also possible that the seating furniture can be brought into a forward-inclined position, as in FIG Fig. 3 is shown. In this position, the front joint axis assumes the other end position in the guide 7. This is achieved in that the leaf spring 4 in the upright basic position according to FIG Fig. 1 between the two joint axes 5, 6 also already forms a slight arching arc, which is then in the position according to FIG Fig. 3 is further flattened. Ultimately, the in FIGS. 1 to 3 The position shown by the guideway of the guide 7 is decisively influenced. In addition, however, the elasticity of the spring structure 4 and the location where the front seat connection means 10 and the rear seat connection means 11 are connected to the spring structure also have a great influence on the synchronous movement.

Aus den schematischen Figuren 4 und 5 ist die räumliche Anordnung der verschiedenen Bauteile ersichtlich. Man erkennt dort insbesondere auch, dass die vorderen und hinteren Sitzanbindungsmittel 10, 11 jeweils paarweise vorhanden sind und seitlich an der als Blattfeder ausgebildeten Federstruktur 4 befestigt sind. Selbstverständlich können sowohl der Sitz 2 mit einer geeigneten Sitzauflage 12 als auch die Rückenlehne 3 mit einer Rückenlehnenauflage 13 versehen werden. Die Tragstruktur 1 weist ferner in üblicher Art und Weise ein oder mehrere Standfüße auf. Bei Verwendung einer zentralen Säule ist diese meist teleskopierbar und stützt sich mit einem Fußkreuz 14 am Boden ab. Im dargestellten Ausführungsbeispiel sieht der Sitz 2 einen Sitzrahmen vor, auf den die Sitzauflage 12 freitragend aufgespannt ist.From the schematic Figures 4 and 5 the spatial arrangement of the various components can be seen. It can also be seen there in particular that the front and rear seat connection means 10, 11 are each present in pairs and are attached to the side of the spring structure 4, which is designed as a leaf spring. Of course, both the seat 2 can be provided with a suitable seat pad 12 and the backrest 3 can be provided with a backrest pad 13. The support structure 1 also has one or more feet in the usual manner. When using a central column, this is usually telescopic and supports itself with a base 14 on the floor. In the illustrated embodiment, the seat 2 provides a seat frame on which the seat support 12 is stretched in a self-supporting manner.

In einer optionalen Ausgestaltung der Erfindung kann eine seitliche Schwenkbarkeit des Sitzmöbels dadurch erreicht werden, dass die hintere Gelenkachse 5 seitlich kippbar an der Tragstruktur 1 gehaltert ist. Dazu wird die hintere Gelenkachse 5 vorzugsweise mittig an der Tragstruktur 1 gehaltert, wie dies aus Fig. 6 und Fig. 7 hervorgeht. Hierzu ist an der Tragstruktur 1 eine konvex gekrümmte Abrollbahn 15 vorgesehen, auf der die hintere Gelenkachse 5 mittig gelagert ist. Damit die hintere Gelenkachse 5 nicht seitlich abrutscht, ist auf der Abrollbahn beispielsweise eine Zahnleiste 16 aufgebracht, die mit einem verzahnten Bereich 5a an der hinteren Gelenkachse 5 in Verzahnungseingriff kommt. Die hintere Gelenkachse 5 wird in Längsrichtung des Stuhles zudem durch eine Umhausung 17 in Position gehalten, um zu verhindern, dass der verzahnte Bereich der hinteren Welle 5 außer Eingriff mit der Zahnleiste 16 gerät. Durch die Abrollbewegung wandert der momentane Drehpunkt bei seitlicher Neigung des Sitzmöbels nach außen, wodurch die seitliche Beweglichkeit des Sitzmöbels ermöglicht wird.In an optional embodiment of the invention, the chair can be swiveled to the side in that the rear hinge axis 5 is mounted on the support structure 1 so that it can be tilted laterally. For this purpose, the rear hinge axis 5 is preferably held centrally on the support structure 1, as shown in FIG FIGS. 6 and 7 emerges. For this purpose, a convexly curved roll-off track 15 is provided on the support structure 1, on which the rear hinge axis 5 is centrally mounted. So that the rear hinge axis 5 does not slip laterally, a toothed strip 16, for example, is applied to the roll-off track and engages with a toothed area 5a on the rear hinge axis 5. The rear hinge axis 5 is also held in position in the longitudinal direction of the chair by a housing 17 in order to prevent the toothed area of the rear shaft 5 from disengaging from the toothed strip 16. As a result of the rolling movement, the momentary pivot point moves outwards when the chair is tilted to the side, which enables the chair to move laterally.

Claims (12)

Sitzmöbel mit einer Tragstruktur (1), einem Sitz (2), einer Rückenlehne (3) und einer Federstruktur (4), wobei die Federstruktur (4) mit der Rückenlehne (3) eine kinematische Einheit bildet und der Sitz (2) mit der Federstruktur (4) verbunden ist und wobei ferner die Federstruktur (4) in einem Mittelbereich um eine hintere Gelenkachse (5) an der Tragstruktur (1) verschwenkbar gelagert ist und in einem vorderen Bereich eine fest mit der Federstruktur (4) verbundene, vordere Gelenkachse (6) aufweist, die in einer Führung (7) beweglich an der Tragstruktur (1) gehaltert ist, sodass das Sitzmöbel zumindest von einer aufrechten Grundstellung um die hintere Gelenkachse (5) in eine zurückgeneigte Stellung verschwenkbar ist.
dadurch gekennzeichnet, dass
die Federstruktur (4) in einer Seitenansicht L-förmig ausgebildet ist, wobei ein im Wesentlichen horizontal verlaufender Schenkel zur Anbindung des Sitzes und ein sich nach oben erstreckender Schenkel zur Anbindung oder Ausbildung der Rückenlehne vorgesehen sind und
auch die hintere Gelenkachse (5) fest mit der Federstruktur (4) verbunden ist, wobei die Führung (7) der vorderen Gelenkachse (6) so ausgerichtet ist, dass sich beim Verschwenken des Sitzmöbels von der aufrechten Grundstellung in die zurückgeneigte Stellung und umgekehrt eine Veränderung des Abstandes der beiden Gelenkachsen (5, 6) und eine dadurch bedingte elastische Verformung der Federstruktur (4) ergibt.Seating furniture with a support structure (1), a seat (2), a backrest (3) and a spring structure (4), the spring structure (4) forming a kinematic unit with the backrest (3) and the seat (2) forming a kinematic unit Spring structure (4) is connected and wherein furthermore the spring structure (4) is pivotably mounted in a central area about a rear hinge axis (5) on the support structure (1) and in a front area a front hinge axis firmly connected to the spring structure (4) (6), which is movably supported in a guide (7) on the support structure (1), so that the seating furniture can be pivoted at least from an upright basic position about the rear hinge axis (5) into a reclined position.
characterized in that
the spring structure (4) is L-shaped in a side view, an essentially horizontally extending leg being provided for connecting the seat and an upwardly extending leg being provided for connecting or forming the backrest, and
the rear hinge axis (5) is also firmly connected to the spring structure (4), the guide (7) of the front hinge axis (6) being aligned so that when the chair is pivoted from the upright basic position to the reclined position and vice versa, a Change in the distance between the two joint axes (5, 6) and a resulting elastic deformation of the spring structure (4) results. Sitzmöbel nach Anspruch 1, dadurch gekennzeichnet, dass die durch die Veränderung des Abstandes der beiden Gelenkachsen (5, 6) bedingte elastische Verformung der Federstruktur (4) eine Wölbung der Federstruktur im Sinne einer Anhebung eines vorderen Endes des Sitzes ergibt.Seating furniture according to claim 1, characterized in that the elastic deformation of the spring structure (4) caused by the change in the distance between the two joint axes (5, 6) results in a curvature of the spring structure in the sense of a lifting of a front end of the seat. Sitzmöbel nach Anspruch 1, dadurch gekennzeichnet, dass die Federstruktur (4) zumindest im Bereich zwischen der vorderen und der hinteren Gelenkachse (6, 5) nach Art einer Blattfeder ausgebildet ist.Seating furniture according to Claim 1, characterized in that the spring structure (4) is designed in the manner of a leaf spring at least in the area between the front and rear hinge axes (6, 5). Sitzmöbel nach Anspruch 1, dadurch gekennzeichnet, dass die Führung (7) durch eine Kulisse, einen Schlitz oder eine Nut gebildet wird und sich die vordere Gelenkachse (6) in der aufrechten Grundstellung in einer Mittelstellung in der Führung (7) und in der zurückgeneigten Stellung in einer ersten Endstellung befindet.Seating furniture according to claim 1, characterized in that the guide (7) is formed by a link, a slot or a groove and the front hinge axis (6) in the upright basic position is in a central position in the guide (7) and in the tilted back position Position is in a first end position. Sitzmöbel nach Anspruch 4, dadurch gekennzeichnet, dass das Sitzmöbel ferner eine nach vorne geneigte Stellung vorsieht, in der sich die vordere Gelenkachse (6) in der anderen Endstellung in der Führung (7) befindet.Seating furniture according to claim 4, characterized in that the seating furniture also provides a forwardly inclined position in which the front hinge axis (6) is in the other end position in the guide (7). Sitzmöbel nach Anspruch 1, dadurch gekennzeichnet, dass die hintere Gelenkachse (5) zur Realisierung einer seitlichen Schwenkbarkeit des Sitzmöbels seitlich kippbar an der Tragstruktur (1) gelagert ist.Seating furniture according to Claim 1, characterized in that the rear hinge axis (5) is mounted on the support structure (1) so that it can be swiveled laterally. Sitzmöbel nach Anspruch 6, dadurch gekennzeichnet, dass die hintere Gelenkachse (5) mittig an der Tragstruktur (1) gelagert ist.Seating furniture according to Claim 6, characterized in that the rear hinge axis (5) is mounted centrally on the supporting structure (1). Sitzmöbel nach Anspruch 6, dadurch gekennzeichnet, dass die Tragstruktur (1) zur Lagerung der hinteren Gelenkachse (5) eine konvex gekrümmte Abrollbahn (15) aufweist, auf welcher die hintere Gelenkachse (5) bei einer seitlichen Schwenkbewegung des Sitzmöbels abrollt.Seating furniture according to claim 6, characterized in that the supporting structure (1) for mounting the rear hinge axis (5) has a convexly curved roll-off track (15) on which the rear hinge axis (5) rolls when the chair moves sideways. Sitzmöbel nach Anspruch 1, dadurch gekennzeichnet, dass der Sitz (2) über vordere Sitzanbindungsmittel (10) und hintere Sitzanbindungsmittel (11) an der Federstruktur gehaltert ist.Seating furniture according to Claim 1, characterized in that the seat (2) is held on the spring structure via front seat connection means (10) and rear seat connection means (11). Sitzmöbel nach Anspruch 9, dadurch gekennzeichnet, dass die vorderen Sitzanbindungsmittel (10) zwischen der vorderen und der hinteren Gelenkachse (6, 5) und die hinteren Sitzanbindungsmittel (11) hinter der hinteren Gelenkachse (5) mit der Federstruktur (4) verbunden sind.Seating furniture according to claim 9, characterized in that the front seat connection means (10) between the front and rear hinge axis (6, 5) and the rear seat connection means (11) behind the rear hinge axis (5) are connected to the spring structure (4). Sitzmöbel nach Anspruch 1, dadurch gekennzeichnet, dass die Federstruktur (4) in der zurückgeneigten Stellung einen Wölbungsbogen (8) mit einem Scheitelpunkt (9) zwischen der vorderen und der hinteren Gelenkachse (6, 5) ausbildet.Seating furniture according to claim 1, characterized in that the spring structure (4) in the reclined position forms an arch (8) with an apex (9) between the front and rear hinge axis (6, 5). Sitzmöbel nach Anspruch 10 und 11, dadurch gekennzeichnet, dass die vorderen Sitzanbindungsmittel (10) vor oder auf dem Scheitelpunkt (9) des Wölbungsbogens (8) mit der Federstruktur (4) verbunden sind.Seating furniture according to Claims 10 and 11, characterized in that the front seat connection means (10) are connected to the spring structure (4) in front of or on the apex (9) of the arch (8).
EP20208304.4A 2019-11-21 2020-11-18 Seating Active EP3824766B1 (en)

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DE102019131428.3A DE102019131428B4 (en) 2019-11-21 2019-11-21 seating furniture

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EP3824766B1 EP3824766B1 (en) 2022-08-17

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Publication number Priority date Publication date Assignee Title
CN114027661A (en) * 2021-11-25 2022-02-11 安吉富和家具有限公司 Chair leaning structure and chair

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1297306B (en) 1965-07-23 1969-06-12 Dare Inglis Products Ltd Tilt chair
DE10319316A1 (en) 2003-02-18 2004-08-26 Hansen, Eckhard, Dipl.-Ing. chair
EP1989963A1 (en) 2007-05-07 2008-11-12 Provenda Marketing AG Seating furniture with seat board and backrest
AT506292A4 (en) * 2008-04-22 2009-08-15 Eckhard Dipl Ing Hansen Seating furniture e.g. office chair, has flexible bending spring supported on mounting unit by bending spring bearing and bent or curved on side of rear seat plate bearing, where side is turned away from bending spring bearing
DE102014103780B3 (en) 2014-03-19 2015-06-18 Wilkhahn Wilkening + Hahne Gmbh + Co. chair

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1297306B (en) 1965-07-23 1969-06-12 Dare Inglis Products Ltd Tilt chair
DE10319316A1 (en) 2003-02-18 2004-08-26 Hansen, Eckhard, Dipl.-Ing. chair
EP1989963A1 (en) 2007-05-07 2008-11-12 Provenda Marketing AG Seating furniture with seat board and backrest
AT506292A4 (en) * 2008-04-22 2009-08-15 Eckhard Dipl Ing Hansen Seating furniture e.g. office chair, has flexible bending spring supported on mounting unit by bending spring bearing and bent or curved on side of rear seat plate bearing, where side is turned away from bending spring bearing
DE102014103780B3 (en) 2014-03-19 2015-06-18 Wilkhahn Wilkening + Hahne Gmbh + Co. chair

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DE102019131428A1 (en) 2021-05-27
EP3824766B1 (en) 2022-08-17

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