EP1468633B1 - Gas-spring mechanism of a chair for synchronized tilting of the seat and the backrest - Google Patents

Gas-spring mechanism of a chair for synchronized tilting of the seat and the backrest Download PDF

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Publication number
EP1468633B1
EP1468633B1 EP04405212A EP04405212A EP1468633B1 EP 1468633 B1 EP1468633 B1 EP 1468633B1 EP 04405212 A EP04405212 A EP 04405212A EP 04405212 A EP04405212 A EP 04405212A EP 1468633 B1 EP1468633 B1 EP 1468633B1
Authority
EP
European Patent Office
Prior art keywords
seat
piston
spring
gas
gas spring
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.)
Expired - Lifetime
Application number
EP04405212A
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German (de)
French (fr)
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EP1468633A1 (en
Inventor
Egon Bräuning
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.)
Vitra AG
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Vitra Patente AG
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Publication date
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Publication of EP1468633A1 publication Critical patent/EP1468633A1/en
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Classifications

    • 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
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • 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
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil 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
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03283—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with fluid springs

Definitions

  • the present invention relates to a mechanism for a chair with a gas spring for the synchronous control of the inclination of his seat and a backrest articulated thereto in a displaceable axis of rotation.
  • the seat rests on a base placed on the floor.
  • the gas spring is articulated on the one hand in a rotation axis at the front of the seat and on the other hand in a rotation axis on the base.
  • the mechanism allows the chair from its initial position - in principle, horizontal seat and vertical backrest - to adjust to a forward, negative inclined writing position and a reclined back relaxation position .
  • a further, vertically installed gas spring may be provided.
  • EP 0 592 369 B1 or US 4 986 601 A discloses a synchronous mechanism for the adjustment of a chair from a forward inclination over a normal position to a reclined backward relaxation position.
  • a pair of coil springs between a fixed seat support and a multi-hinged seat support is arranged. This mechanism has proven itself over the years, but takes a larger volume and is relatively expensive, therefore installation and cost-intensive.
  • the invention has for its object to propose a simplified mechanism with adequate utility properties.
  • the mechanism is provided for a chair with a first gas spring for synchronous control of the inclination of its seat and a backrest articulated thereto in a displaceable axis of rotation.
  • the seat rests on one on the Floor-mounted underframe.
  • the first gas spring is articulated on the one hand in a rotational axis at the front of the seat and on the other hand in a rotational axis on the base.
  • the first gas spring surrounds a sealed housing enclosing a gas chamber.
  • a piston with the piston rod outgoing therefrom is limitedly axially displaceable.
  • the piston rod extends away from the piston in the expulsion direction, while the diametrical axial direction is defined as the insertion direction.
  • a spring element is arranged.
  • the piston is in the initial position, with in principle horizontal seat and vertical backrest, the spring element in a neutral position, and in weight concentration on the front portion of the seat, as evoked by the prevention of a user, the distance between the two increases the first gas spring enclosing rotary axes.
  • the piston acts against the spring element and can move beyond the zero position, opposite to the insertion direction, namely further in Austriebsplatz, via a path to a preferred end position.
  • the front of the seat lowers against the action of the spring element from the zero position in a negative position inclined to the ground.
  • the movement of the seat is followed by a synchronous adjustment of the backrest with forward tilt; The chair is thereby adjusted to the writing position.
  • the piston is in the unlocked zero position on the spring element, and in weight concentration on the rear portion of the seat, as caused when reclining a user, the distance between the two the first gas spring enclosing axes of rotation decreases.
  • the piston moves away from the zero position, in the insertion direction, namely opposite to the direction of expulsion, from the spring element and can move over a path as far as an inserted end position.
  • the front portion of the seat rises against the Austriebstendenz the first gas spring from the zero position in a raised to the ground position.
  • the movement of the seat is followed by a synchronous adjustment of the backrest with inclination to the rear; The chair is thus adjusted to the relaxed position.
  • the one axis of rotation is located below the seat and is displaceable.
  • the underframe is formed by a foot and a seat support. Between the foot and the seat support may be at least in principle vertically standing spring, preferably a second gas spring, be installed on the piston rod of the seat support is placed.
  • the other axis of rotation is fixed and arranged on the seat support. Axially through the piston rod of the first gas spring extends an externally operable valve rod, on which a valve cone is arranged, to which a complementary valve seat is located in the piston. When the valve plug is closed, the gas exchange between both sides of the piston is prevented.
  • the piston rod exits the housing of the first gas spring through an axial passage.
  • the spring element is fixed within the housing and adjacent to the passage.
  • the spring element of the first gas spring is made of rubber or plastic. Alternatively, it is a diaphragm spring or designed as a pre-compressed gas cushion.
  • the spring element in principle has the shape of a pipe piece which surrounds the guided out of the housing piston rod. Tabs are hinged on the one hand on the seat support in a fixed axis of rotation and on the other hand on the seat in a displaceable axis of rotation. The lower extensions of the backrest are articulated in a fixed axis of rotation on the seat support. Between the rear region of the seat and the seat support may advantageously be arranged a spring, preferably a helical spring, which acts parallel to the first gas spring.
  • the chair - shown here in the starting position with in principle horizontal Seat 3 and associated, upright backrest 2 - consists essentially further from the base frame, which carries the seat 3 and the backrest 2 .
  • the base frame is formed of the star base 4, the vertically rising center column 41 and the seat support 10.
  • a second gas spring 5 with the upwardly projecting piston rod 50 for varying the seat height.
  • On the free conical end of the piston rod 50 of the seat support 10 is placed.
  • rollers 40 are attached.
  • Seat 3 and backrest 2 are usually covered with a cushion.
  • the backrest 3 has the seat 3 under cross arms 20, the foothills 21 are articulated in a fixed axis of rotation D1 on the seat support 10 .
  • the arms 20 go claws 22 , which are hinged to a displaceable axis of rotation D2 together with outgoing from the seat 3 lugs 32 .
  • the seat 3 can be divided into the front area 30 and the rear area 31 .
  • a spring mount 12 is arranged, in which a coil spring 11 is inserted, which is supported against the seat 3 .
  • the bearing head 7 is articulated with the ram 70 guided axially therein in a fixed axis of rotation D4 .
  • the piston rod 63 engages the first gas spring 6 , which on the other hand is articulated in a displaceable axis of rotation D3 under the seat 3 .
  • claws 13 extend downwardly, through which the displaceable axis of rotation D5 extends, on which hinge plates 14 on the one hand are articulated.
  • the joint plates 14 are articulated in a fixed axis of rotation D6 on the seat carrier 10 .
  • the actuating and connecting parts form the actuating mechanism 1 of the chair.
  • the first gas spring 6 and the coil spring 11 act parallel to each other.
  • the backrest 2 In this initial position , the backrest 2 is in the vertical direction y 0 in principle vertical and the seat 3 in the horizontal direction x 0 in principle.
  • a user sitting in the chair thus set is in the basically upright basic position.
  • the first gas spring 6 is surrounded by a sealed housing 60 , which is a Gas chamber 61 encloses. Within the gas chamber 61 , a piston 62 with the piston rod 63 extending therefrom is limitedly axially displaceable. The piston rod 63 extends away from the piston 62 in the expulsion direction, while the diametrical axial direction is defined as the insertion direction. In front of the piston 62, in Austriebsplatz, a spring element 68 is arranged. The piston 62 is in the starting position, with in principle horizontal seat 3 and vertical backrest 2, on the spring element 68 in a zero position z 0 . This position corresponds to a defined distance between the two the first gas spring 6 enclosing axes of rotation D3, D4. In FIG. 1A , a section of the piston rod 63 is visible between the bearing head 7 and the housing 60 , ie the first gas spring 6 has moved apart.
  • An externally actuable valve rod 64 extends axially in a valve rod bore 660 through the piston rod 63 of the first gas spring 6, on which a valve plug 67 is arranged, to which a complementary valve seat 66 is located in the piston 62 .
  • the piston rod 63 exits the housing 60 of the first gas spring 6 through an axial passage 600 .
  • the spring element 68 is fixed within the housing 60 and adjacent to the passage 600 .
  • the guided in the bearing head 70 plunger 70 is an extension of the valve stem 64 and acts upon actuation thereto.
  • the free outer end of the piston rod 63 is provided with a connection region 65 , from which protrudes the end of the valve rod 64 .
  • the first gas spring 6 has a front side of the housing 60 mounted suspension 69, here in the form of an eyelet.
  • FIGS. 2A to 2D are identical to FIGS. 2A to 2D
  • the backrest 2 is in a rearwardly inclined orientation y 1 and the seat 3 in the front raised orientation x 1 .
  • a user sitting in this chair is in the backward leaning relaxation position.
  • valve rod 64 could be actuated to bring the poppet 67 into the valve seat 66 so that the gas exchange between the two sides of the piston 62 is blocked via the overflow channel 661 (see Figure 2D).
  • the backrest 2 is in a forwardly inclined orientation y 2 and the seat 3 in the front lowered position x 2 .
  • a user sitting in the chair thus set is in the forward inclined writing position.
  • the piston 62 acts against the spring element 68 and moved about the zero position z 0 addition, opposite to the insertion direction, namely more in-out direction, over a path s 2, up to a preferred limit position for the second
  • the front portion 30 of the seat 3 has lowered against the action of the spring element 68 from the zero position x 0 in a negative position inclined to the bottom x 2 .
  • the movement of the seat 3 was followed by a synchronous adjustment of the backrest 2 with forward inclination, so that the chair has thereby moved to the writing position .
  • a longer section of the piston rod 63 is visible between the bearing head 7 and the housing 60 , ie the first gas spring 6 has moved apart to a maximum extent.

Landscapes

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

Abstract

The seat gas spring (6) has a sealed housing (60) which surrounds it and a gas chamber (61) inside which is a cylinder (62) with a piston (63) which moves in the direction of actuation and has a diametric axial direction defined. A spring (68) is moved by the piston in the direction of motion and in an exit position has a perpendicular position to the seat and rear seat rest. A section of the piston is visible through the housing.

Description

Anwendungsgebiet der ErfindungField of application of the invention

Die vorliegende Erfindung betrifft eine Mechanik für einen Stuhl mit einer Gasfeder zur synchronen Steuerung der Neigung seines Sitzes und einer daran in einer verlagerbaren Drehachse angelenkten Rückenlehne. Der Sitz ruht auf einem auf dem Boden aufsetzenden Untergestell. Die Gasfeder ist einerseits in einer Drehachse am Frontbereich des Sitzes und andererseits in einer Drehachse am Untergestell angelenkt. Die Mechanik erlaubt, den Stuhl aus seiner Ausgangsposition - mit im Prinzip waagerechtem Sitz und senkrechter Rückenlehne - in eine nach vorn, negativ geneigte Schreibposition sowie eine nach hinten geneigte Relaxposition zu verstellen. Zur Variation der Sitzhöhe kann eine weitere, vertikal eingebaute Gasfeder vorgesehen sein.The present invention relates to a mechanism for a chair with a gas spring for the synchronous control of the inclination of his seat and a backrest articulated thereto in a displaceable axis of rotation. The seat rests on a base placed on the floor. The gas spring is articulated on the one hand in a rotation axis at the front of the seat and on the other hand in a rotation axis on the base. The mechanism allows the chair from its initial position - in principle, horizontal seat and vertical backrest - to adjust to a forward, negative inclined writing position and a reclined back relaxation position . To vary the seat height, a further, vertically installed gas spring may be provided.

Stand der TechnikState of the art

In der EP 0 592 369 B1 oder der US 4 986 601 A ist eine Synchronmechanik für die Verstellung eines Stuhls von einer Vorwärtsneigung über eine Normalposition bis zu einer nach hinten geneigten Relaxposition offenbart. Hierzu ist ein Paar von Schraubenfedern zwischen einer feststehenden Sitzstütze und einem mehrfach angelenkten Sitzträger angeordnet. Diese Mechanik hat sich über Jahre bewährt, nimmt jedoch ein grösseres Bauvolumen ein und ist relativ aufwendig, daher montage- und kostenintensiver.EP 0 592 369 B1 or US 4 986 601 A discloses a synchronous mechanism for the adjustment of a chair from a forward inclination over a normal position to a reclined backward relaxation position. For this purpose, a pair of coil springs between a fixed seat support and a multi-hinged seat support is arranged. This mechanism has proven itself over the years, but takes a larger volume and is relatively expensive, therefore installation and cost-intensive.

Aufgabe der ErfindungObject of the invention

Angesichts der obigen Nachteile liegt der Erfindung die Aufgabe zugrunde, eine vereinfachte Mechanik mit adäquaten Gebrauchswerteigenschaften vorzuschlagen.In view of the above disadvantages, the invention has for its object to propose a simplified mechanism with adequate utility properties.

Übersicht über die ErfindungOverview of the invention

Die Mechanik ist für einen Stuhl mit einer ersten Gasfeder zur synchronen Steuerung der Neigung seines Sitzes und einer daran in einer verlagerbaren Drehachse angelenkten Rückenlehne vorgesehen. Der Sitz ruht auf einem auf dem Boden aufsetzenden Untergestell. Die erste Gasfeder ist einerseits in einer Drehachse am Frontbereich des Sitzes und andererseits in einer Drehachse am Untergestell angelenkt. Die erste Gasfeder umgibt ein abgedichtetes Gehäuse, das eine Gaskammer einschliesst. Innerhalb der Gaskammer ist ein Kolben mit der davon abgehenden Kolbenstange begrenzt axial verschiebbar angeordnet. Die Kolbenstange erstreckt sich vom Kolben weg in Austriebsrichtung, während die diametrale Axialrichtung als Einschubrichtung definiert wird. Vor dem Kolben, in Austriebsrichtung, ist ein Federelement angeordnet. Der Kolben steht in der Ausgangsposition, mit im Prinzip waagerechtem Sitz und senkrechter Rückenlehne, am Federelement in einer Nullstellung an, und bei Gewichtskonzentration auf den Frontbereich des Sitzes, wie beim Vorbeugen eines Benutzers hervorgerufen, vergrössert sich der Abstand zwischen den beiden die erste Gasfeder einschliessenden Drehachsen. Somit wirkt der Kolben gegen das Federelement und kann sich über die Nullstellung hinaus, entgegengesetzt der Einschubrichtung, nämlich weiter in Austriebsrichtung, über einen Weg bis in eine vorgezogene Endlage bewegen. Dabei senkt sich der Frontbereich des Sitzes gegen die Wirkung des Federelements aus der Nullstellung in eine zum Boden geneigte Negativstellung ab. Der Bewegung des Sitzes folgt eine synchrone Verstellung der Rückenlehne mit Vorwärtsneigung; der Stuhl verstellt sich dadurch in die Schreibposition. The mechanism is provided for a chair with a first gas spring for synchronous control of the inclination of its seat and a backrest articulated thereto in a displaceable axis of rotation. The seat rests on one on the Floor-mounted underframe. The first gas spring is articulated on the one hand in a rotational axis at the front of the seat and on the other hand in a rotational axis on the base. The first gas spring surrounds a sealed housing enclosing a gas chamber. Within the gas chamber, a piston with the piston rod outgoing therefrom is limitedly axially displaceable. The piston rod extends away from the piston in the expulsion direction, while the diametrical axial direction is defined as the insertion direction. Before the piston, in Austriebsrichtung, a spring element is arranged. The piston is in the initial position, with in principle horizontal seat and vertical backrest, the spring element in a neutral position, and in weight concentration on the front portion of the seat, as evoked by the prevention of a user, the distance between the two increases the first gas spring enclosing rotary axes. Thus, the piston acts against the spring element and can move beyond the zero position, opposite to the insertion direction, namely further in Austriebsrichtung, via a path to a preferred end position. In this case, the front of the seat lowers against the action of the spring element from the zero position in a negative position inclined to the ground. The movement of the seat is followed by a synchronous adjustment of the backrest with forward tilt; The chair is thereby adjusted to the writing position.

Der Kolben steht in der unarretierten Nullstellung am Federelement an, und bei Gewichtskonzentration auf den hinteren Bereich des Sitzes, wie beim Zurücklehnen eines Benutzers hervorgerufen, verringert sich der Abstand zwischen den beiden die erste Gasfeder einschliessenden Drehachsen. Dadurch entfernt sich der Kolben - aus der Nullstellung heraus, in Einschubrichtung, nämlich entgegengesetzt der Austriebsrichtung - vom Federelement und kann sich über einen Weg bis in eine eingeschobene Endlage bewegen. Dabei hebt sich der Frontbereich des Sitzes gegen die Austriebstendenz der ersten Gasfeder aus der Nullstellung in eine zum Boden aufgerichtete Stellung an. Der Bewegung des Sitzes folgt eine synchrone Verstellung der Rückenlehne mit Neigung nach hinten; der Stuhl verstellt sich dadurch in die Relaxposition. The piston is in the unlocked zero position on the spring element, and in weight concentration on the rear portion of the seat, as caused when reclining a user, the distance between the two the first gas spring enclosing axes of rotation decreases. As a result, the piston moves away from the zero position, in the insertion direction, namely opposite to the direction of expulsion, from the spring element and can move over a path as far as an inserted end position. In this case, the front portion of the seat rises against the Austriebstendenz the first gas spring from the zero position in a raised to the ground position. The movement of the seat is followed by a synchronous adjustment of the backrest with inclination to the rear; The chair is thus adjusted to the relaxed position.

Die nachfolgenden Merkmale beziehen sich auf spezielle Ausführungen der Erfindung: Die eine Drehachse befindet sich unterhalb des Sitzes und ist verlagerbar. Das Untergestell wird von einem Fuss und einem Sitzträger gebildet. Zwischen dem Fuss und dem Sitzträger kann eine zumindest im Prinzip vertikal stehende Feder, vorzugsweise eine zweite Gasfeder, eingebaut sein, auf deren Kolbenstange der Sitzträger aufgesetzt ist. Die andere Drehachse ist feststehend und am Sitzträger angeordnet. Axial durch die Kolbenstange der ersten Gasfeder erstreckt sich eine von aussen betätigbare Ventilstange, auf der ein Ventilkegel angeordnet ist, zu dem sich im Kolben ein komplementärer Ventilsitz befindet. Bei geschlossenem Ventilkegel ist der Gasaustausch zwischen beiden Seiten des Kolbens unterbunden. Die Kolbenstange tritt durch einen axialen Durchlass aus dem Gehäuse der ersten Gasfeder aus. Das Federelement ist innerhalb des Gehäuses und benachbart zum Durchlass fixiert.The following features relate to specific embodiments of the invention: The one axis of rotation is located below the seat and is displaceable. The underframe is formed by a foot and a seat support. Between the foot and the seat support may be at least in principle vertically standing spring, preferably a second gas spring, be installed on the piston rod of the seat support is placed. The other axis of rotation is fixed and arranged on the seat support. Axially through the piston rod of the first gas spring extends an externally operable valve rod, on which a valve cone is arranged, to which a complementary valve seat is located in the piston. When the valve plug is closed, the gas exchange between both sides of the piston is prevented. The piston rod exits the housing of the first gas spring through an axial passage. The spring element is fixed within the housing and adjacent to the passage.

Das Federelement der ersten Gasfeder besteht aus Gummi oder Kunststoff. Alternativ ist es eine Tellerfeder oder als vorkomprimiertes Gaspolster gestaltet. Zum Beispiel weist das Federelement im Prinzip die Gestalt eines Rohrstücks auf, welches die aus dem Gehäuse herausgeführte Kolbenstange umgibt. Laschen sind einerseits am Sitzträger in einer feststehenden Drehachse und andererseits am Sitz in einer verlagerbaren Drehachse angelenkt. Die unteren Ausläufer der Rückenlehne sind in einer feststehenden Drehachse am Sitzträger angelenkt. Zwischen dem hinteren Bereich des Sitzes und dem Sitzträger kann vorteilhaft eine Feder, vorzugsweise eine Schraubenfeder, angeordnet sein, die parallel zur ersten Gasfeder wirkt.The spring element of the first gas spring is made of rubber or plastic. Alternatively, it is a diaphragm spring or designed as a pre-compressed gas cushion. For example, the spring element in principle has the shape of a pipe piece which surrounds the guided out of the housing piston rod. Tabs are hinged on the one hand on the seat support in a fixed axis of rotation and on the other hand on the seat in a displaceable axis of rotation. The lower extensions of the backrest are articulated in a fixed axis of rotation on the seat support. Between the rear region of the seat and the seat support may advantageously be arranged a spring, preferably a helical spring, which acts parallel to the first gas spring.

Kurzbeschreibung der beigefügten ZeichnungenBrief description of the attached drawings

Es zeigen:

Figur 1A -
einen Stuhl mit der erfindungsgemässen Mechanik, in der Ausgangsposition (im Prinzip Sitzfläche waagerecht, Rückenlehne senkrecht), in Seitenansicht;
Figur 1B -
eine Prinzipskizze des Stuhls in der Stellung gemäss Figur 1A, mit einem darauf in der Grundposition sitzenden Benutzer;
Figur 1C -
eine in der Mechanik eingesetzte Gasfeder, in der Stellung des Stuhls gemäss den Figuren 1A und 1B, mit offenem Ventil;
Figur 2A -
den Stuhl in der Relaxposition (Sitzfläche und Rückenlehne nach hinten geneigt), in Seitenansicht;
Figur 2B -
eine Prinzipskizze des Stuhls in der Stellung gemäss Figur 2A, mit einem darauf sitzenden Benutzer;
Figur 2C -
die Gasfeder in der Stellung des Stuhls gemäss den Figuren 2A und 2B, mit offenem Ventil;
Figur 2D -
die Gasfeder in der Stellung des Stuhls gemäss den Figuren 2A und 2B, mit geschlossenem Ventil;
Figur 3A -
den Stuhl in der Schreibposition (Sitzfläche und Rückenlehne nach vorn geneigt), in Seitenansicht;
Figur 3B -
eine Prinzipskizze des Stuhls in der Stellung gemäss Figur 3A, mit einem darauf sitzenden Benutzer; und
Figur 3C -
die Gasfeder in der Stellung des Stuhls gemäss den Figuren 3A und 3B, mit offenem Ventil.
Show it:
Figure 1A -
a chair with the inventive mechanism, in the starting position (in principle seat horizontally, backrest vertical), in side view;
FIG. 1B -
a schematic diagram of the chair in the position according to Figure 1A, with a seated in it in the basic position user;
FIG. 1C
a gas spring used in the mechanism, in the position of the chair according to the figures 1A and 1B, with an open valve;
Figure 2A -
the chair in the relaxed position (seat and backrest tilted backwards), in side view;
FIG. 2B -
a schematic diagram of the chair in the position according to Figure 2A, with a user sitting thereon;
FIG. 2C -
the gas spring in the position of the chair according to Figures 2A and 2B, with an open valve;
FIG. 2D -
the gas spring in the position of the chair according to Figures 2A and 2B, with the valve closed;
FIG. 3A -
the chair in the writing position (seat and back tilted forward), in side view;
FIG. 3B -
a schematic diagram of the chair in the position according to Figure 3A, with a user sitting thereon; and
FIG. 3C -
the gas spring in the position of the chair according to Figures 3A and 3B, with an open valve.

Ausführungsbeispielembodiment

Anhand der beiliegenden Zeichnungen erfolgt nachstehend die detaillierte Beschreibung eines Ausführungsbeispiels zur erfindungsgemässen Mechanik.Reference to the accompanying drawings, the detailed description of an embodiment of the inventive mechanism will follow.

Für die gesamte weitere Beschreibung gilt folgende Festlegung. Sind in einer Figur zum Zweck zeichnerischer Eindeutigkeit Bezugsziffern enthalten, aber im unmittelbar zugehörigen Beschreibungstext nicht erläutert, so wird auf deren Erwähnung in vorangehenden Figurenbeschreibungen Bezug genommen. Im Interesse der Übersichtlichkeit wird auf die wiederholte Bezeichnung von Bauteilen in nachfolgenden Figuren zumeist verzichtet, sofern zeichnerisch eindeutig erkennbar ist, dass es sich um "wiederkehrende" Bauteile handelt.The following definition applies to the entire further description. If reference numerals are included in a figure for the purpose of graphic clarity, but are not explained in the directly associated description text, reference is made to their mention in the preceding description of the figures. For the sake of clarity, the repeated designation of components in subsequent figures is usually dispensed with, as far as the drawing clearly shows that they are "recurring" components.

Figuren 1A bis 1CFIGS. 1A to 1C

Der Stuhl - hier in der Ausgangsposition gezeigt, mit im Prinzip waagerechtem Sitz 3 und damit verbundener, senkrecht stehender Rückenlehne 2 - besteht im wesentlichen ferner aus dem Untergestell, welches den Sitz 3 und die Rückenlehne 2 trägt. Das Untergestell bildet sich aus dem Sternenfuss 4, der sich vertikal erhebenden Mittelsäule 41 und dem Sitzträger 10. In der Mittelsäule 41 ist vertikal eine zweite Gasfeder 5 mit der nach oben ragenden Kolbenstange 50 zur Variation der Sitzhöhe eingebaut. Auf das freie konische Ende der Kolbenstange 50 ist der Sitzträger 10 aufgesetzt. Unten am Sternenfuss 4 sind Rollen 40 angebracht. Sitz 3 und Rückenlehne 2 sind üblicherweise mit einem Polster überzogen. Die Rückenlehne 3 besitzt den Sitz 3 untergreifende Arme 20, deren Ausläufer 21 in einer feststehenden Drehachse D1 am Sitzträger 10 angelenkt sind. Von den Armen 20 gehen Klauen 22 ab, die an einer verlagerbaren Drehachse D2 zusammen mit vom Sitz 3 abgehenden Nasen 32 angelenkt sind. Der Sitz 3 lässt sich in den Frontbereich 30 und den hinteren Bereich 31 gliedern. An der hinteren Partie des Sitzträgers 10 ist eine Federfassung 12 angeordnet, in der eine Schraubenfeder 11 eingesetzt ist, welche sich gegen den Sitz 3 abstützt.The chair - shown here in the starting position , with in principle horizontal Seat 3 and associated, upright backrest 2 - consists essentially further from the base frame, which carries the seat 3 and the backrest 2 . The base frame is formed of the star base 4, the vertically rising center column 41 and the seat support 10. In the center column 41 is vertically installed a second gas spring 5 with the upwardly projecting piston rod 50 for varying the seat height. On the free conical end of the piston rod 50 of the seat support 10 is placed. At the bottom of the star base 4 rollers 40 are attached. Seat 3 and backrest 2 are usually covered with a cushion. The backrest 3 has the seat 3 under cross arms 20, the foothills 21 are articulated in a fixed axis of rotation D1 on the seat support 10 . Of the arms 20 go claws 22 , which are hinged to a displaceable axis of rotation D2 together with outgoing from the seat 3 lugs 32 . The seat 3 can be divided into the front area 30 and the rear area 31 . At the rear portion of the seat support 10 , a spring mount 12 is arranged, in which a coil spring 11 is inserted, which is supported against the seat 3 .

Am vorderen Bereich des Sitzträgers 10 ist in einer feststehenden Drehachse D4 der Lagerkopf 7 mit dem darin axial geführten Stössel 70 angelenkt. In den Lagerkopf 7 greift die Kolbenstange 63 der ersten Gasfeder 6 ein, welche anderseits in einer verlagerbaren Drehachse D3 unter dem Sitz 3 angelenkt ist. Vom Frontbereich 30 des Sitzes erstrecken sich Klauen 13 nach unten, durch die sich die verlagerbare Drehachse D5 erstreckt, an welcher Gelenklaschen 14 einerseits angelenkt sind. Andererseits sind die Gelenklaschen 14 in einer feststehenden Drehachse D6 am Sitzträger 10 angelenkt. Die Stell- und Verbindungsteile bilden die Stellmechanik 1 des Stuhls. Die erste Gasfeder 6 und die Schraubenfeder 11 wirken zueinander parallel. In dieser Ausgangsposition steht die Rückenlehne 2 in der im Prinzip senkrechten Ausrichtung y 0 und der Sitz 3 in der im Prinzip waagerechten Ausrichtung x 0 . Ein im so eingestellten Stuhl sitzender Benutzer befindet sich in der im Prinzip aufrechten Grundposition. At the front region of the seat carrier 10 , the bearing head 7 is articulated with the ram 70 guided axially therein in a fixed axis of rotation D4 . In the bearing head 7 , the piston rod 63 engages the first gas spring 6 , which on the other hand is articulated in a displaceable axis of rotation D3 under the seat 3 . From the front portion 30 of the seat, claws 13 extend downwardly, through which the displaceable axis of rotation D5 extends, on which hinge plates 14 on the one hand are articulated. On the other hand, the joint plates 14 are articulated in a fixed axis of rotation D6 on the seat carrier 10 . The actuating and connecting parts form the actuating mechanism 1 of the chair. The first gas spring 6 and the coil spring 11 act parallel to each other. In this initial position , the backrest 2 is in the vertical direction y 0 in principle vertical and the seat 3 in the horizontal direction x 0 in principle. A user sitting in the chair thus set is in the basically upright basic position.

Die erste Gasfeder 6 ist von einem dichten Gehäuse 60 umgeben, das eine Gaskammer 61 umschliesst. Innerhalb der Gaskammer 61 ist ein Kolben 62 mit der davon abgehenden Kolbenstange 63 begrenzt axial verschiebbar angeordnet. Die Kolbenstange 63 erstreckt sich vom Kolben 62 weg in Austriebsrichtung, während die diametrale Axialrichtung als Einschubrichtung definiert wird. Vor dem Kolben 62, in Austriebsrichtung, ist ein Federelement 68 angeordnet. Der Kolben 62 steht in der Ausgangsposition, mit im Prinzip waagerechtem Sitz 3 und senkrechter Rückenlehne 2, am Federelement 68 in einer Nullstellung z 0 an. Dieser Position entspricht ein definierter Abstand zwischen den beiden die erste Gasfeder 6 einschliessenden Drehachsen D3,D4. In Figur 1A ist zwischen dem Lagerkopf 7 und dem Gehäuse 60 ein Abschnitt der Kolbenstange 63 sichtbar, d.h. die erste Gasfeder 6 ist auseinander gefahren.The first gas spring 6 is surrounded by a sealed housing 60 , which is a Gas chamber 61 encloses. Within the gas chamber 61 , a piston 62 with the piston rod 63 extending therefrom is limitedly axially displaceable. The piston rod 63 extends away from the piston 62 in the expulsion direction, while the diametrical axial direction is defined as the insertion direction. In front of the piston 62, in Austriebsrichtung, a spring element 68 is arranged. The piston 62 is in the starting position, with in principle horizontal seat 3 and vertical backrest 2, on the spring element 68 in a zero position z 0 . This position corresponds to a defined distance between the two the first gas spring 6 enclosing axes of rotation D3, D4. In FIG. 1A , a section of the piston rod 63 is visible between the bearing head 7 and the housing 60 , ie the first gas spring 6 has moved apart.

Eine von aussen betätigbare Ventilstange 64 erstreckt sich axial in einer Ventilstangenbohrung 660 durch die Kolbenstange 63 der ersten Gasfeder 6, auf der ein Ventilkegel 67 angeordnet ist, zu dem sich im Kolben 62 ein komplementärer Ventilsitz 66 befindet. Bei geschlossenem Ventilkegel 67 wäre der Gasaustausch zwischen beiden Seiten des Kolbens 62 über den Überströmkanal 661 unterbunden. Die Kolbenstange 63 tritt durch einen axialen Durchlass 600 aus dem Gehäuse 60 der ersten Gasfeder 6 aus. Das Federelement 68 ist innerhalb des Gehäuses 60 und benachbart zum Durchlass 600 fixiert. Der im Lagerkopf 70 geführte Stössel 70 stellt eine Verlängerung der Ventilstange 64 dar und wirkt bei Betätigung auf diese. Zum Verbinden mit dem Lagerkopf 70 ist das freie äussere Ende der Kolbenstange 63 mit einem Anschlussbereich 65 versehen, aus dem das Ende der Ventilstange 64 herausragt. Zum Anlenken in der Drehachse D3 besitzt die erste Gasfeder 6 eine stirnseitig am Gehäuse 60 angebrachte Aufhängung 69, hier in Gestalt einer Öse.An externally actuable valve rod 64 extends axially in a valve rod bore 660 through the piston rod 63 of the first gas spring 6, on which a valve plug 67 is arranged, to which a complementary valve seat 66 is located in the piston 62 . When the valve cone 67 is closed, the gas exchange between both sides of the piston 62 via the overflow channel 661 would be prevented. The piston rod 63 exits the housing 60 of the first gas spring 6 through an axial passage 600 . The spring element 68 is fixed within the housing 60 and adjacent to the passage 600 . The guided in the bearing head 70 plunger 70 is an extension of the valve stem 64 and acts upon actuation thereto. For connection to the bearing head 70 , the free outer end of the piston rod 63 is provided with a connection region 65 , from which protrudes the end of the valve rod 64 . For articulation in the axis of rotation D3 , the first gas spring 6 has a front side of the housing 60 mounted suspension 69, here in the form of an eyelet.

Figuren 2A bis 2DFIGS. 2A to 2D

In dieser Figurengruppe steht die Rückenlehne 2 in einer nach hinten geneigten Ausrichtung y 1 und der Sitz 3 in der vorn angehobenen Ausrichtung x 1 . Ein im so eingestellten Stuhl sitzender Benutzer befindet sich in der nach hinten gelehnten Relaxposition. In this group of figures, the backrest 2 is in a rearwardly inclined orientation y 1 and the seat 3 in the front raised orientation x 1 . A user sitting in this chair is in the backward leaning relaxation position.

Durch Gewichtskonzentration auf den hinteren Bereich 31 des Sitzes 3, wie beim Zurücklehnen eines Benutzers hervorgerufen, hat sich der Abstand zwischen den beiden die erste Gasfeder 6 einschliessenden Drehachsen D3,D4 verringert. Anfänglich stand der Kolben 62 in der unarretierten Nullstellung z 0 am Federelement 68 an. Nun hat sich der Kolben 62, aus der Nullstellung z 0 heraus, in Einschubrichtung, nämlich entgegengesetzt der Austriebsrichtung, vom Federelement 68 entfernt und sich über einen Weg s 1 , bis in eine eingeschobene Endlage z 1 bewegt. Dabei wurde der Frontbereich 30 des Sitzes 3 gegen die Austriebstendenz der ersten Gasfeder 6 aus der Nullstellung x 0 in eine zum Boden aufgerichtete Stellung x 1 angehoben. Der Bewegung des Sitzes 3 folgte eine synchrone Verstellung der Rückenlehne 2 mit Neigung nach hinten in die Relaxposition. Gemäss Figur 2A verblieb kein Abstand mehr zwischen dem Lagerkopf 7 und dem Gehäuse 60, d.h. die erste Gasfeder 6 ist maximal zusammen gefahren.By weight concentration on the rear portion 31 of the seat 3 , as caused when reclining a user, the distance between the two the first gas spring 6 including rotating axes D3, D4 has been reduced. Initially, the piston 62 stood on the spring element 68 in the unlocked zero position z 0 . Now, the piston 62 has, from the zero position z 0 out, in the insertion direction, namely opposite to the Austriebsrichtung, away from the spring element 68 and moves over a path s 1 , to an inserted end position z 1 . The front portion 30 of the seat 3 was raised against the Austriebstendenz the first gas spring 6 from the zero position x 0 in a raised position to the ground x 1 . The movement of the seat 3 was followed by a synchronous adjustment of the backrest 2 with tilting backwards into the relax position. According to FIG. 2A, there was no longer any distance between the bearing head 7 and the housing 60, ie the first gas spring 6 has traveled at maximum together.

In jeder Stellung des Kolbens 62 könnte die Ventilstange 64 betätigt werden, um den Ventilkegel 67 in den Ventilsitz 66 zu bringen, so dass der Gasaustausch zwischen den beiden Seiten des Kolbens 62 über den Überströmkanal 661 blockiert ist (s. Figur 2D).In either position of the piston 62 , the valve rod 64 could be actuated to bring the poppet 67 into the valve seat 66 so that the gas exchange between the two sides of the piston 62 is blocked via the overflow channel 661 (see Figure 2D).

Figuren 3A bis 3C und Bezug auf Figur 2CFIGS. 3A to 3C and with reference to FIG. 2C

In dieser Figurengruppe 3A bis 3C steht die Rückenlehne 2 in einer nach vorn geneigten Ausrichtung y 2 und der Sitz 3 in der einer vorn abgesenkten Ausrichtung x 2 . Ein im so eingestellten Stuhl sitzender Benutzer befindet sich in der nach vorn geneigten Schreibposition. In this group of figures 3A to 3C, the backrest 2 is in a forwardly inclined orientation y 2 and the seat 3 in the front lowered position x 2 . A user sitting in the chair thus set is in the forward inclined writing position.

Zunächst (s. Figur 2C) stand der Kolben 62 in der Ausgangsposition, mit im Prinzip waagerechtem Sitz 3 und senkrechter Rückenlehne 2, am Federelement 68 in der Nullstellung z 0 an. Durch Gewichtskonzentration auf den Frontbereich 30 des Sitzes 3, wie beim Vorbeugen eines Benutzers hervorgerufen, hat sich der Abstand zwischen den beiden die erste Gasfeder 6 einschliessenden Drehachsen D3,D4 jetzt maximal vergrössert. Der Kolben 62 wirkt gegen das Federelement 68 und bewegte sich über die Nullstellung z 0 hinaus, entgegengesetzt der Einschubrichtung, nämlich weiter in Austriebsrichtung, über einen Weg s 2 , bis in eine vorgezogene Endlage z 2 . Dabei hat sich der Frontbereich 30 des Sitzes 3 gegen die Wirkung des Federelements 68 aus der Nullstellung x 0 in eine zum Boden geneigte Negativstellung x 2 abgesenkt. Der Bewegung des Sitzes 3 folgte eine synchrone Verstellung der Rückenlehne 2 mit Vorwärtsneigung, so dass sich der Stuhl dadurch in die Schreibposition verstellt hat. In Figur 3A ist zwischen dem Lagerkopf 7 und dem Gehäuse 60 ein längerer Abschnitt der Kolbenstange 63 sichtbar, d.h. die erste Gasfeder 6 ist maximal auseinander gefahren. Für die erste Gasfeder 6 ergibt sich damit von der Stellung in der Relaxposition über die Ausgangsposition bis in die Stellung der Schreibposition ein gesamter Hub über den Weg s = s 1 + s 2 von der eingeschobenen Endlage z 1 des Kolbens 62 über seine Nullstellung z 0 bis in die vorgezogene Endlage z 2 . First (see Figure 2C) was the piston 62 in the starting position, with in principle horizontal seat 3 and vertical backrest 2, on the spring element 68 in the zero position z 0 at. By weight concentration on the front portion 30 of the seat 3, as evoked by the prevention of a user, has become the distance between the two the first gas spring 6 enclosing axes of rotation D3, D4 now maximally increased. The piston 62 acts against the spring element 68 and moved about the zero position z 0 addition, opposite to the insertion direction, namely more in-out direction, over a path s 2, up to a preferred limit position for the second In this case, the front portion 30 of the seat 3 has lowered against the action of the spring element 68 from the zero position x 0 in a negative position inclined to the bottom x 2 . The movement of the seat 3 was followed by a synchronous adjustment of the backrest 2 with forward inclination, so that the chair has thereby moved to the writing position . In FIG. 3A, a longer section of the piston rod 63 is visible between the bearing head 7 and the housing 60 , ie the first gas spring 6 has moved apart to a maximum extent. For the first gas spring 6 thus results from the position in the relax position on the starting position to the position of the writing position a total stroke over the way s = s 1 + s 2 of the retracted end position z 1 of the piston 62 via its zero position z 0 up to the advanced end position z 2 .

Claims (8)

  1. Chair mechanism, having a first gas spring (6) for synchronously controlling the inclination of its seat (3) and of a backrest (2) coupled thereto in a movable hinge (D2), wherein:
    a) the seat (3) rests on an underframe (4,10) in contact with the floor;
    b) the first gas spring (6) is coupled, on the one hand, in a hinge (D3) on the front region (30) of the seat (3) and, on the other hand, in a hinge (D4) on the underframe (4,10);
    c) the first gas spring (6) surrounds a sealed housing (60), which encloses a gas chamber (61);
    d) a piston (62), with the piston rod (63) emanating therefrom, is disposed within the gas chamber (61) such that it is limitedly axially displaceable; and
    e) the piston rod (63) extends away from the piston (62) in the push-out direction, whilst the diametrical axial direction is defined as the push-in direction, characterized in that
    f) a spring element (68) is disposed in front of the piston (62) in the push-out direction;
    g) the piston (62), in the starting position with in principle horizontal seat (3) and vertical backrest (2), butts against the spring element (68) in a zero setting (z 0 ) and, when weight is concentrated onto the front region (30) of the seat (3), as happens whenever a user leans forward, the distance between the two hinges (D3,D4) enclosing the first gas spring (6) lengthens; whereby
    h) the piston (62) acts against the spring element (68) and can move beyond the zero setting (z 0 ), opposite to the push-in direction, i.e. further in the push-out direction, over a path (s 2 ) into an advanced end position (z 2 ), and the front region (30) of the seat (3) is hereupon lowered, counter to the action of the spring element (68), out of the zero setting (x 0 ) into a negative setting (x 2 ) at an angle to the floor; wherein
    i) the movement of the seat (3) is accompanied by a synchronous adjustment of the backrest (2) with forward tilt and the chair thereby assumes the typing position.
  2. Mechanism according to Claim 1, characterized in that
    a) the piston (62), in the unlocked zero setting (z 0 ), butts against the spring element (68) and, when weight is concentrated onto the rear region (31) of the seat (3), as happens whenever a user leans back, the distance between the two hinges (D3,D4) enclosing the first gas spring (6) shortens; whereby
    b) the piston (62) moves from the zero setting (z 0 ), in the push-in direction, i.e. opposite to the push-out direction, away from the spring element (68) and can move over a path (s1) into a pushed-in end position (z1), and the front region (30) of the seat (3) is hereupon raised, counter to the push-out tendency of the first gas spring (6), out of the zero setting (x 0 ) into a raised setting (x 1 ) relative to the floor; and
    c) the movement of the seat (3) is accompanied by a synchronous adjustment of the backrest (2) with rearward tilt and the chair thereby assumes the relax position.
  3. Mechanism according to Claim 1 or 2, characterized in that
    a) one hinge (D3) is situated beneath the seat (3) and is movable;
    b) the underframe (4,10) is formed by a foot (4) and a seat support (10);
    c) between the foot (4) and the seat support (10) can be fitted an, at least in principle, vertically standing spring (5), preferably a second gas spring, on whose piston rod (50) the seat support (10) is mounted; and
    d) the other hinge (D4) is fixed and is disposed on the seat support (10).
  4. Mechanism according to one of Claims 1 to 3, characterized in that
    a) extending axially through the piston rod (63) of the first gas spring (6) is an externally operated valve rod (64), on which there is disposed a valve cone (67) for which a complementary valve seat (66) is present in the piston (62); and
    b) when the valve cone (67) is closed, the gas exchange between the two sides of the piston (62) is prevented.
  5. Mechanism according to one of Claims 1 to 4, characterized in that the piston rod (63) exits the housing (60) of the first gas spring (6) through an axial opening (600) and the spring element (68) is fixed within the housing (60) and adjacent to the opening (600).
  6. Mechanism according to one of Claims 1 to 5, characterized in that the spring element (68) of the first gas spring (6) consists of rubber or plastic, or is a cup spring, or is designed as a precompressed gas cushion.
  7. Mechanism according to Claim 6, characterized in that the spring element (68) has in principle the shape of a pipe length, which surrounds the piston rod (63) guided out of the housing (60).
  8. Mechanism according to one of Claims 1 to 7, characterized in that
    a) link plates (14) are coupled, on the one hand, to the seat support (10) in a fixed hinge (D6) and, on the other hand, to the seat (3) in a movable hinge (D5);
    b) the lower extensions (21) of the backrest (2) are coupled to the seat support (10) in a fixed hinge (D1), and
    c) between the rear region (31) of the seat (3) and the seat support (10) there is disposed a spring (11), preferably a helical spring, which acts parallel to the first gas spring (6).
EP04405212A 2003-04-14 2004-04-07 Gas-spring mechanism of a chair for synchronized tilting of the seat and the backrest Expired - Lifetime EP1468633B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20306014U 2003-04-14
DE20306014U DE20306014U1 (en) 2003-04-14 2003-04-14 Mechanism for a chair with a gas spring for synchronous control of the inclination of the seat and backrest

Publications (2)

Publication Number Publication Date
EP1468633A1 EP1468633A1 (en) 2004-10-20
EP1468633B1 true EP1468633B1 (en) 2006-07-19

Family

ID=7981507

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04405212A Expired - Lifetime EP1468633B1 (en) 2003-04-14 2004-04-07 Gas-spring mechanism of a chair for synchronized tilting of the seat and the backrest

Country Status (4)

Country Link
EP (1) EP1468633B1 (en)
AT (1) ATE333228T1 (en)
DE (2) DE20306014U1 (en)
ES (1) ES2268606T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004007095A1 (en) * 2004-02-13 2005-08-25 Interstuhl Büromöbel GmbH & Co. KG Office chair is mounted on support with curved upper surface, pneumatic spring moving support to reclining position and pneumatic lines connecting spring to cylinders which move slides attached to back rest
DE202005011725U1 (en) * 2005-07-27 2006-12-07 Sander, Armin Chair, especially office chair
US20090021065A1 (en) * 2006-04-27 2009-01-22 Egon Brauning Mechanism for a Chair
WO2011099945A1 (en) 2010-02-09 2011-08-18 Insu Teknik Makina Sanayi Ve Ticaret Anonim Sirketi A pusher component providing additional force to oil and gas pressure in shock absorbers
KR102270286B1 (en) * 2016-09-01 2021-06-29 유이 퍼니쳐 컴퍼니., 리미티드. chair structure and chair

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3837727A1 (en) * 1988-11-07 1990-05-10 Link Wilhelm Kg CHAIR, ESPECIALLY OFFICE CHAIR
JPH0520199Y2 (en) * 1988-11-30 1993-05-26
DE4135948C2 (en) * 1991-10-31 1993-12-23 Rolf Voelkle Chair, in particular office swivel chair
DE9315337U1 (en) * 1993-10-11 1994-02-03 Bitsch, Hans-Ullrich, Prof. Dipl.-Designer, 40545 Düsseldorf Seating furniture, in particular office swivel chair with inclination adjustment of the seat and backrest
DE19810768B4 (en) * 1998-03-06 2009-09-24 Drabert Gmbh office chair
DE10126000A1 (en) * 2001-05-18 2002-11-21 Bock 1 Gmbh & Co Synchronous mechanism for the simultaneous swiveling of the seat and backrest of office chairs

Also Published As

Publication number Publication date
EP1468633A1 (en) 2004-10-20
DE502004000970D1 (en) 2006-08-31
DE20306014U1 (en) 2003-06-26
ATE333228T1 (en) 2006-08-15
ES2268606T3 (en) 2007-03-16

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