EP1647207B1 - Chair - Google Patents

Chair Download PDF

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Publication number
EP1647207B1
EP1647207B1 EP05015402A EP05015402A EP1647207B1 EP 1647207 B1 EP1647207 B1 EP 1647207B1 EP 05015402 A EP05015402 A EP 05015402A EP 05015402 A EP05015402 A EP 05015402A EP 1647207 B1 EP1647207 B1 EP 1647207B1
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EP
European Patent Office
Prior art keywords
seat
backrest
lever
axis
chair according
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.)
Active
Application number
EP05015402A
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German (de)
French (fr)
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EP1647207A1 (en
Inventor
Werner Link
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.)
Interstuhl Bueromoebel GmbH and Co KG
Original Assignee
Interstuhl Bueromoebel GmbH and Co KG
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Application filed by Interstuhl Bueromoebel GmbH and Co KG filed Critical Interstuhl Bueromoebel GmbH and Co KG
Priority to PL05015402T priority Critical patent/PL1647207T3/en
Publication of EP1647207A1 publication Critical patent/EP1647207A1/en
Application granted granted Critical
Publication of EP1647207B1 publication Critical patent/EP1647207B1/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
    • 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
    • A47C1/03277—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
    • A47C1/03279—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 of torsion type
    • 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 chair with a seat and with a mechanism for tilt-adjustable attachment of the seat to a seat post connected to a center column, the mechanism comprising a toggle assembly having a fixed to a stationary center axis on the seat first lever and a fixed axis of rotation on the seat support articulated second lever comprises, wherein the two levers are pivotally connected to each other at a displaceable axis of rotation, and wherein means for connecting the displaceable axis of rotation are provided with the seat.
  • Such a chair may be, for example, an office chair, conference chair, visitor chair or the like. It may be the seat and / or the backrest in the inclination adjustable.
  • the DE 44 03 123 A1 describes a synchronizing adjustment in which the relationship between the seat trim and the backrest inclination is adjustable.
  • the synchronous adjustment mechanism is formed by a plurality of articulated parts and a power storage element, in this case a gas spring. Due to the large number of components are the known synchronizing mechanisms but relatively expensive and expensive. In addition, the life of the known adjustment mechanisms is limited because of the large number of moving and thus subject to wear parts.
  • a chair with a synchronous adjustment is presented in which the seat is fixed by means of a first elastically deformable spring element on the chair column.
  • the backrest is attached via a backrest support to a second elastically deformable spring element, which is coupled to the first spring element.
  • the first spring element or the seat surface are also elastically or hingedly connected to the second spring element or the backrest support.
  • toggle lever assembly By using a toggle lever assembly can be in the in the DE 90 02 416 U1 chair described the tilting movements are arbitrarily continuously adjusted, and the movements are optimally soft.
  • the number of mechanical elements for the adjustment, such as joints, can be reduced to a minimum.
  • complicated mechanical spring elements and wear-endangered gear or translation devices are completely eliminated.
  • Seat and seat support can be easily connected with each other.
  • Object of the present invention is in contrast to further develop a chair with the features mentioned that with the simplest possible, mechanically robust means influencing the dependent of the pressurization of the seated tilt adjustment of the seat is possible.
  • the telescopic element may be formed by a insertable into a receptacle against the force of a compression spring pin.
  • the chair may additionally have a mechanism for tilt adjustment of the backrest.
  • an arcuate rod is provided, on which the slider is mounted. This results in the tilt adjustment of the backrest in a pleasant relaxation position.
  • a slider may be mounted on one side of the seat opposite to the other slider, wherein the two slides are fastened via a respective connecting element on the central axis. The movement of the two sliders is synchronous.
  • the first lever of the toggle lever assembly is rotatably connected to the rotatable central axis, whereby upon lowering of the seat via the first lever, the central axis is rotated and thereby the sliders are moved backwards over the connecting elements. This lowers the backrest together with the seat to the rear.
  • a gas spring may be provided for locking the slider.
  • a seat 1 to recognize which essentially comprises a backrest 2, a seat 3 and a center column 4 , which is connected to a not shown, on wheels movable underframe.
  • the seat 2 has a shell shape with a flat central part 5 and two laterally arranged, in the direction of the backrest 2 raised cheeks 6 .
  • the seat 3 is mounted on the seat post 7 on the center pillar 4.
  • the backrest 2 is connected to the cheeks 6 via two transversely to the backrest 2 arranged L-shaped backrest support 8 , whose one arm 8a is fixed to the backrest 2 and the other arm 8b hinged to the cheek 6. From the L-shape and the lateral arrangement of the backrest support 8 results in a spacing of the backrest 2 to the rear seating area of the seat 2 below the lower, the seat facing backrest area 9.
  • the arm 8b has a distance from the rear seating area.
  • the backrest supports 8 surround the seated side and can be used as armrests.
  • the backrest 2, the seat 3 and the backrest support 8 are covered with a pad 10a to 10c .
  • FIG. 2 clearly shows the seat shape with the flat middle part 5 and the raised cheeks 6 for receiving a mechanism for synchronous control of the inclination of the seat and the backrest.
  • the Indian FIG. 2 not shown arm 8a of the backrest support 8 is fixedly connected to a slider 11 which is displaceable on an arcuate rod 12 with a round cross section for generating a vertical base position and an inclined relaxation position of the backrest.
  • the articulation of the backrest support is identical to the two inner sides of the cheeks 6.
  • these are each connected via a connecting element 13 with a rotatable central axis 14 .
  • the displacement of the sliders 11 takes place in each case against the spring force of a tension spring 15, so that the sliders 11 and thus the backrest automatically return to the normal position.
  • a gas spring 16 is provided, which is connected to the connecting element 13. If a sufficient pressure in the gas spring 16 constructed, the movement of the connecting element 13 and thus the further displacement of the slider 11 is blocked.
  • the central axis 14 also forms the interface between the tilt adjustment of the backrest and the tilt adjustment of the seat.
  • a toggle lever assembly 17 At the central axis 14 engages a toggle lever assembly 17 , which allows the inclination of the seat 3 with respect to the seat support 7 and controls the inclination adjustment in dependence on the weight shift of the sitter.
  • the toggle lever assembly 17 on the other hand connected to a torsion bar 18 which is fixedly mounted at its ends on the seat 3 and which forms the axis of rotation for the seat 3.
  • the toggle lever assembly 17 comprises a formed by the central axis 14, fixed to the seat 3 arranged first axis of rotation, formed by the torsion bar 18, fixedly disposed on the seat 3 second axis of rotation, a stationary on the seat support 7 arranged third rotation axis 19, a displaceable fourth rotation axis 20 and a displaceable fifth rotation axis 21.
  • a first lever 22 is arranged rotationally fixed and connected via the fourth axis of rotation 20 with a second lever 23 which is articulated to the seat support 7.
  • the levers 22 and 23 are moved about the axis of rotation 20 against each other and a receptacle 25 and a pin 26 pushed together against the spring force of a compression spring 27 .
  • the force is transmitted to a further lever 28, which is deflected and causes the torsion of the torsion bar 18, because this further lever 28 is secured against rotation with the torsion bar 18.
  • a spindle 29 By means of a spindle 29 , the force for the deflection of the lever 28 can be additionally adjusted.
  • the torsion bar 18 serves to return the seat 3 at discharge.
  • FIGS. 4a to 5b From the sequence of FIGS. 4a to 5b are the inclination possibilities of seat 3 and backrest 2 from a basic position ( FIGS. 4a and 4b ) in a relaxation position ( FIGS. 5a and 5b ) can be seen. Possible weight shifts of the sitter are indicated by arrows.

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)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Abstract

The chair has a seat (3) and a mechanics at seat carrier (7) connected with a central column (4). The mechanics has a knee lever arrangement (17) having two levers connected articulately with each other at the displaceable rotation axis (20). The first lever (22) is fastened on the seat at stationary center line (14) and the second lever (23) on the seat carrier at a stationary rotation axis (19).

Description

Die vorliegende Erfindung betrifft einen Stuhl mit einem Sitz und mit einer Mechanik zur neigungsverstellbaren Befestigung des Sitzes an einem mit einer Mittelsäule verbundenen Sitzträger, wobei die Mechanik eine Kniehebelanordnung mit einem an einer ortsfesten Mittelachse am Sitz befestigten ersten Hebel und einem an einer feststehenden Drehachse am Sitzträger angelenkten zweiten Hebel umfasst, wobei die beiden Hebel an einer verlagerbaren Drehachse miteinander gelenkig verbunden sind, und wobei Mittel zur Verbindung der verlagerbaren Drehachse mit dem Sitz vorgesehen sind.The present invention relates to a chair with a seat and with a mechanism for tilt-adjustable attachment of the seat to a seat post connected to a center column, the mechanism comprising a toggle assembly having a fixed to a stationary center axis on the seat first lever and a fixed axis of rotation on the seat support articulated second lever comprises, wherein the two levers are pivotally connected to each other at a displaceable axis of rotation, and wherein means for connecting the displaceable axis of rotation are provided with the seat.

Ein Stuhl mit diesen Merkmalen ist in der DE 90 02 416 U1 beschrieben.A chair with these features is in the DE 90 02 416 U1 described.

Ein derartiger Stuhl kann beispielsweise ein Bürostuhl, Konferenzstuhl, Besucherstuhl oder dergleichen sein. Es kann der Sitz und/oder die Lehne in der Neigung verstellbar sein.Such a chair may be, for example, an office chair, conference chair, visitor chair or the like. It may be the seat and / or the backrest in the inclination adjustable.

Die DE 44 03 123 A1 beschreibt eine Synchronverstellung, bei der das Verhältnis zwischen der Neidung des Sitzes und der Neigung der Rückenlehne einstellbar ist. Die synchrone Verstellmechanik wird dabei von mehreren gelenkig miteinander verbundenen Teilen und einem Kraftspeicherelement, in diesem Falle einer Gasfeder, gebildet. Aufgrund der großen Zahl von Bauteilen sind die bekannten Synchronmechanismen aber relativ aufwändig und teuer. Außerdem ist die Lebensdauer der bekannten Verstellmechanismen wegen der großen Zahl an bewegten und damit dem Verschleiß unterworfenen Teilen begrenzt.The DE 44 03 123 A1 describes a synchronizing adjustment in which the relationship between the seat trim and the backrest inclination is adjustable. The synchronous adjustment mechanism is formed by a plurality of articulated parts and a power storage element, in this case a gas spring. Due to the large number of components are the known synchronizing mechanisms but relatively expensive and expensive. In addition, the life of the known adjustment mechanisms is limited because of the large number of moving and thus subject to wear parts.

In der DE 297 04 906 U1 wird ein Stuhl mit einer Synchronverstellung vorgestellt, bei dem die Sitzfläche mittels eines ersten elastisch verformbaren Federelements an der Stuhlsäule befestigt ist. Die Rückenlehne ist über einen Rückenlehnenträger an einem zweiten elastisch verformbaren Federelement, das mit dem ersten Federelement gekoppelt ist, befestigt. Das erste Federelement oder die Sitzfläche sind außerdem elastisch oder gelenkig mit dem zweiten Federelement oder dem Rückenlehnenträger verbunden. Dadurch werden die oben erwähnten Nachteile früherer Mechaniken zur Synchronverstellung teilweise vermieden, insbesondere wird eine hohe Lebensdauer und ein Minimum an Geräuschentwicklung bei der Betätigung erreicht. Allerdings sind auch bei dieser Lösung wiederum eine Vielzahl mechanischer Teile mit entsprechendem Montageaufwand und Verschleißrisiko vorgesehen. Außerdem lässt sich damit keine beliebige, stufenlose Relativverstellung von Sitzfläche und Rückenlehne erreichen.In the DE 297 04 906 U1 a chair with a synchronous adjustment is presented in which the seat is fixed by means of a first elastically deformable spring element on the chair column. The backrest is attached via a backrest support to a second elastically deformable spring element, which is coupled to the first spring element. The first spring element or the seat surface are also elastically or hingedly connected to the second spring element or the backrest support. As a result, the above-mentioned disadvantages of previous mechanisms for synchronizing adjustment are partially avoided, in particular a long life and a minimum of noise during the operation is achieved. However, a large number of mechanical parts with corresponding installation effort and risk of wear are also provided in this solution again. In addition, it can thus achieve any, stepless relative adjustment of the seat and backrest.

Durch die Verwendung einer Kniehebelanordnung können bei dem in der DE 90 02 416 U1 beschriebenen Stuhl die Neigungsbewegungen beliebig stufenlos eingestellt werden, und die Bewegungsabläufe sind optimal weich. Die Anzahl der mechanischen Elemente für die Verstellung, wie beispielsweise Gelenke, kann auf ein Minimum reduziert werden. Insbesondere fallen komplizierte mechanische Federelemente und verschleißgefährdete Getriebe- oder Übersetzungseinrichtungen völlig weg. Sitz und Sitzträger können so auf einfache Weise miteinander verbunden werden.By using a toggle lever assembly can be in the in the DE 90 02 416 U1 chair described the tilting movements are arbitrarily continuously adjusted, and the movements are optimally soft. The number of mechanical elements for the adjustment, such as joints, can be reduced to a minimum. In particular, complicated mechanical spring elements and wear-endangered gear or translation devices are completely eliminated. Seat and seat support can be easily connected with each other.

Aufgabe der vorliegenden Erfindung ist es demgegenüber, einen Stuhl mit den eingangs genannten Merkmalen dahin gehend weiterzubilden, dass mit möglichst einfachen, mechanisch robusten Mitteln eine Beeinflussung der von der Druckbeaufschlagung des Sitzenden abhängigen Neigungsverstellung des Sitzes ermöglicht wird.Object of the present invention is in contrast to further develop a chair with the features mentioned that with the simplest possible, mechanically robust means influencing the dependent of the pressurization of the seated tilt adjustment of the seat is possible.

Diese Aufgabe wird durch einen Stuhl mit den eingangs genannten Merkmalen gelöst, in dem die verlagerbare Drehachse über ein teleskopierbares Element und einen weiteren Hebel mit einem Torsionsstab verbunden ist, wobei der weitere Hebel mit dem Torsionsstab verdrehsicher verbunden ist.This object is achieved by a chair having the features mentioned, in which the displaceable axis of rotation is connected via a telescopic element and a further lever with a torsion bar, wherein the further lever is connected against rotation with the Torsionsstab.

In einfacher technischer Ausgestaltung kann das teleskopierbare Element durch einen in eine Aufnahme gegen die Kraft einer Druckfeder einführbaren Stift ausgebildet sein.In a simple technical embodiment, the telescopic element may be formed by a insertable into a receptacle against the force of a compression spring pin.

Zur Neigungsverstellung einer Rückenlehne kann der Stuhl zusätzlich eine Mechanik zur Neigungsverstellung der Rückenlehne aufweisen.For tilt adjustment of a backrest, the chair may additionally have a mechanism for tilt adjustment of the backrest.

Eine elegante Art der Ausbildung der Neigungsverstellung ergibt sich daraus, dass die Rückenlehne über einen Lehnenträger mit einem Gleitstück verbunden ist, welches an dem Sitz verschiebbar gelagert ist. Die Rückenlehne kann dabei seitlich an dem Sitz befestigt werden.An elegant way of training the tilt adjustment results from the fact that the backrest is connected via a backrest support with a slider which is slidably mounted on the seat. The backrest can be attached to the side of the seat.

Bevorzugt ist ein bogenförmiger Stab vorgesehen, an dem das Gleitstück gelagert ist. Daraus resultiert die Neigungsverstellung der Rückenlehne in eine angenehme Relaxposition.Preferably, an arcuate rod is provided, on which the slider is mounted. This results in the tilt adjustment of the backrest in a pleasant relaxation position.

(Fortsetzung ursprüngliche Seite 4)(Continued original page 4)

Es kann jeweils ein Gleitstück an einer Seite des Sitzes gegenüberliegend zu dem anderen Gleitstück angebracht sein, wobei die beiden Gleitstücke über jeweils ein Verbindungselement an der Mittelachse befestigt sind. Die Bewegung der beiden Gleitstücke erfolgt synchron.In each case, a slider may be mounted on one side of the seat opposite to the other slider, wherein the two slides are fastened via a respective connecting element on the central axis. The movement of the two sliders is synchronous.

Zur synchronen Neigung von Sitz und Rückenlehne ist vorgesehen, dass der erste Hebel der Kniehebelanordnung mit der rotierbaren Mittelachse drehfest verbunden ist, wodurch bei einem Absenken des Sitzes über den ersten Hebel die Mittelachse gedreht und dadurch über die Verbindungselemente die Gleitstücke nach hinten verschoben werden. Dadurch senkt sich die Rückenlehne gemeinsam mit dem Sitz nach hinten ab. Der Winkel, den der erste Hebel und die beiden Verbindungselemente, die alle an der Mittelachse befestigt sind, einschließen, bestimmt, in welchem Maß sich die Rückenlehne mit dem Sitz absenkt.For synchronous inclination of the seat and backrest is provided that the first lever of the toggle lever assembly is rotatably connected to the rotatable central axis, whereby upon lowering of the seat via the first lever, the central axis is rotated and thereby the sliders are moved backwards over the connecting elements. This lowers the backrest together with the seat to the rear. The angle subtended by the first lever and the two connecting elements, which are all attached to the central axis, determines the extent to which the backrest is lowered to the seat.

Zur Arretierung der geneigten Rückenlehne kann eine Gasfeder zur Arretierung des Gleitstücks vorgesehen sein.To lock the inclined backrest, a gas spring may be provided for locking the slider.

Ein bevorzugtes Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch dargestellt und wird unter Bezugnahme auf die Figuren beschrieben. Es zeigt im Einzelnen:

Figur 1
eine perspektivische Ansicht eines Stuhls;
Figur 2
eine perspektivische Ansicht eines Sitzes des Stuhls ohne Sitzpolster;
Figur 3
einen Schnitt durch den Sitz gemäß der Linie III-III in Figur 2;
Figur 4a
eine Seitenansicht des Sitzes ohne Neigung des Sitzes und der Rückenlehne;
Figur 4b
eine vergrößerte Ansicht eines Details der Seitenansicht gemäß Figur 4a;
Figur 5a
eine Seitenansicht des Sitzes mit Neigung des Sitzes und der Rückenlehne;
Figur 5b
eine vergrößerte Ansicht eines Details der Seitenansicht gemäß Figur 5a.
A preferred embodiment of the invention is shown schematically in the drawing and will be described with reference to the figures. It shows in detail:
FIG. 1
a perspective view of a chair;
FIG. 2
a perspective view of a seat of the chair without seat cushion;
FIG. 3
a section through the seat according to the line III-III in FIG. 2 ;
FIG. 4a
a side view of the seat without inclination of the seat and the backrest;
FIG. 4b
an enlarged view of a detail of the side view according to FIG. 4a ;
FIG. 5a
a side view of the seat with inclination of the seat and the backrest;
FIG. 5b
an enlarged view of a detail of the side view according to FIG. 5a ,

Aus der Figur 1 ist der Aufbau eines Sitzes 1 zu erkennen, welcher im Wesentlichen eine Rückenlehne 2, einen Sitz 3 und eine Mittelsäule 4 umfasst, welche mit einem nicht gezeigten, über Rollen fahrbaren Untergestell verbunden ist.From the FIG. 1 is the structure of a seat 1 to recognize, which essentially comprises a backrest 2, a seat 3 and a center column 4 , which is connected to a not shown, on wheels movable underframe.

Der Sitz 2 weist eine Schalenform mit einem flachen Mittelteil 5 und zwei seitlich angeordneten, in Richtung der Rückenlehne 2 hochgezogenen Wangen 6 auf. Der Sitz 3 ist über einen Sitzträger 7 an der Mittelsäule 4 angebracht.The seat 2 has a shell shape with a flat central part 5 and two laterally arranged, in the direction of the backrest 2 raised cheeks 6 . The seat 3 is mounted on the seat post 7 on the center pillar 4.

Die Rückenlehne 2 ist mit den Wangen 6 über zwei quer zur Rückenlehne 2 angeordnete L-förmige Lehnenträger 8 verbunden, deren einer Arm 8a fest an der Rückenlehne 2 und deren anderer Arm 8b bewegbar an der Wange 6 angelenkt ist. Aus der L-Form und der seitlichen Anordnung der Lehnenträger 8 ergibt sich eine Beabstandung der Rückenlehne 2 zum hinteren Sitzbereich des Sitzes 2 unterhalb des unteren, dem Sitz zugewandten Lehnenbereichs 9. Auch der Arm 8b besitzt einen Abstand zum hinteren Sitzbereich.The backrest 2 is connected to the cheeks 6 via two transversely to the backrest 2 arranged L-shaped backrest support 8 , whose one arm 8a is fixed to the backrest 2 and the other arm 8b hinged to the cheek 6. From the L-shape and the lateral arrangement of the backrest support 8 results in a spacing of the backrest 2 to the rear seating area of the seat 2 below the lower, the seat facing backrest area 9. The arm 8b has a distance from the rear seating area.

Die Lehnenträger 8 umschließen den Sitzenden seitlich und können als Armlehnen genutzt werden. Die Rückenlehne 2, der Sitz 3 und die Lehnenträger 8 sind mit einem Polster 10a bis 10c überzogen.The backrest supports 8 surround the seated side and can be used as armrests. The backrest 2, the seat 3 and the backrest support 8 are covered with a pad 10a to 10c .

Figur 2 zeigt deutlich die Sitzform mit dem flachen Mittelteil 5 und den hochgezogenen Wangen 6 zur Aufnahme einer Mechanik zur synchronen Steuerung der Neigung des Sitzes und der Rückenlehne. FIG. 2 clearly shows the seat shape with the flat middle part 5 and the raised cheeks 6 for receiving a mechanism for synchronous control of the inclination of the seat and the backrest.

Der in der Figur 2 nicht gezeigte Arm 8a des Lehnenträgers 8 wird mit einem Gleitstück 11 fest verbunden, welches auf einem bogenförmigen Stab 12 mit einem runden Querschnitt zur Erzeugung einer senkrechten Grundposition und einer geneigten Relaxposition der Rückenlehne verschiebbar ist. Die Anlenkung der Lehnenträger ist an den beiden Innenseiten der Wangen 6 identisch ausgebildet. Zur synchronen Bewegung der beiden Gleitstücke 11 sind diese jeweils über ein Verbindungselement 13 mit einer drehbaren Mittelachse 14 verbunden. Die Verschiebung der Gleitstücke 11 erfolgt jeweils gegen die Federkraft einer Zugfeder 15, sodass die Gleitstücke 11 und somit die Rückenlehne automatisch in die Grundstellung zurückkehren. Zur Arretierung des Gleitstücks 11 ist eine Gasfeder 16 vorgesehen, welche mit dem Verbindungselement 13 verbunden ist. Ist ein ausreichender Druck in der Gasfeder 16 aufgebaut, wird die Bewegung des Verbindungselements 13 und damit die weitere Verschiebung des Gleitstücks 11 blockiert.The Indian FIG. 2 not shown arm 8a of the backrest support 8 is fixedly connected to a slider 11 which is displaceable on an arcuate rod 12 with a round cross section for generating a vertical base position and an inclined relaxation position of the backrest. The articulation of the backrest support is identical to the two inner sides of the cheeks 6. For synchronous movement of the two sliders 11, these are each connected via a connecting element 13 with a rotatable central axis 14 . The displacement of the sliders 11 takes place in each case against the spring force of a tension spring 15, so that the sliders 11 and thus the backrest automatically return to the normal position. For locking the slider 11, a gas spring 16 is provided, which is connected to the connecting element 13. If a sufficient pressure in the gas spring 16 constructed, the movement of the connecting element 13 and thus the further displacement of the slider 11 is blocked.

Die Mittelachse 14 bildet auch die Schnittstelle zwischen der Neigungsverstellung der Rückenlehne und der Neigungsverstellung des Sitzes. An der Mittelachse 14 greift eine Kniehebelanordnung 17 an, welche die Neigung des Sitzes 3 bezüglich dem Sitzträger 7 ermöglicht und die Neigungsverstellung in Abhängigkeit von der Gewichtsverlagerung des Sitzenden steuert. Die Kniehebelanordnung 17 ist andererseits mit einem Torsionsstab 18 verbunden, welcher an seinen Enden ortsfest am Sitz 3 gelagert ist und der die Drehachse für den Sitz 3 bildet.The central axis 14 also forms the interface between the tilt adjustment of the backrest and the tilt adjustment of the seat. At the central axis 14 engages a toggle lever assembly 17 , which allows the inclination of the seat 3 with respect to the seat support 7 and controls the inclination adjustment in dependence on the weight shift of the sitter. The toggle lever assembly 17 on the other hand connected to a torsion bar 18 which is fixedly mounted at its ends on the seat 3 and which forms the axis of rotation for the seat 3.

Wie aus der Figur 3 ersichtlich ist, umfasst die Kniehebelanordnung 17 eine durch die Mittelachse 14 ausgebildete, am Sitz 3 ortsfest angeordnete erste Drehachse, eine durch den Torsionsstab 18 ausgebildete, am Sitz 3 ortsfest angeordnete zweite Drehachse, eine am Sitzträger 7 ortsfest angeordnete dritte Drehachse 19, eine verlagerbare vierte Drehachse 20 und eine verlagerbare fünfte Drehachse 21. Like from the FIG. 3 it can be seen, the toggle lever assembly 17 comprises a formed by the central axis 14, fixed to the seat 3 arranged first axis of rotation, formed by the torsion bar 18, fixedly disposed on the seat 3 second axis of rotation, a stationary on the seat support 7 arranged third rotation axis 19, a displaceable fourth rotation axis 20 and a displaceable fifth rotation axis 21.

An der Mittelachse 14 ist ein erster Hebel 22 drehfest angeordnet und über die vierte Drehachse 20 mit einem zweiten Hebel 23 verbunden, welcher gelenkig an dem Sitzträger 7 gelagert ist. Erfolgt nun eine Druckbeaufschlagung des Sitzes 3 in Pfeilrichtung 24, werden die Hebel 22 und 23 um die Drehachse 20 gegeneinander bewegt und eine Aufnahme 25 und ein Stift 26 gegen die Federkraft einer Druckfeder 27 zusammengeschoben. Die Kraft überträgt sich auf einen weiteren Hebel 28, der ausgelenkt wird und die Torsion des Torsionsstabs 18 bewirkt, weil dieser weitere Hebel 28 verdrehsicher mit dem Torsionsstab 18 verbunden ist. Mithilfe einer Spindel 29 kann die Kraft zur Auslenkung des Hebels 28 zusätzlich justiert werden. Der Torsionsstab 18 dient der Rückstellung des Sitzes 3 bei Entlastung.At the central axis 14, a first lever 22 is arranged rotationally fixed and connected via the fourth axis of rotation 20 with a second lever 23 which is articulated to the seat support 7. Now , if a pressurization of the seat 3 in the direction of arrow 24, the levers 22 and 23 are moved about the axis of rotation 20 against each other and a receptacle 25 and a pin 26 pushed together against the spring force of a compression spring 27 . The force is transmitted to a further lever 28, which is deflected and causes the torsion of the torsion bar 18, because this further lever 28 is secured against rotation with the torsion bar 18. By means of a spindle 29 , the force for the deflection of the lever 28 can be additionally adjusted. The torsion bar 18 serves to return the seat 3 at discharge.

Wird der Sitz 3 durch Gewichtsbelastung in Pfeilrichtung 24 hinten abgesenkt, kommt es über den ersten Hebel 22, der drehfest an der Mittelachse 14 angeordnet ist, zu einem Verdrehen dieser Mittelachse 14. Dadurch werden die Verbindungselemente 13 und die an ihnen befestigten Gleitstücke 11 nach hinten bewegt, wodurch die Rückenlehne synchron zum Sitz 3 in der Neigung verstellt wird.If the seat 3 is lowered by weight loading in the direction of arrow 24 back, it comes via the first lever 22 which is rotatably mounted on the central axis 14, to a rotation of this central axis 14. Thus, the connecting elements 13 and attached to them sliders 11 to the rear moved, whereby the backrest is synchronously adjusted to the seat 3 in the inclination.

Aus der Abfolge der Figuren 4a bis 5b sind die Neigungsmöglichkeiten von Sitz 3 und Rückenlehne 2 aus einer Grundposition ( Figuren 4a und 4b ) in eine Relaxposition ( Figuren 5a und 5b ) ersichtlich. Mögliche Gewichtsverlagerungen des Sitzenden sind durch Pfeile angedeutet.From the sequence of FIGS. 4a to 5b are the inclination possibilities of seat 3 and backrest 2 from a basic position ( FIGS. 4a and 4b ) in a relaxation position ( FIGS. 5a and 5b ) can be seen. Possible weight shifts of the sitter are indicated by arrows.

Claims (8)

  1. Chair (1) with a seat (3) and with a mechanical system for tilt adjustable fixing of the seat (3) to a seat support (7) connected to a central column (4), in which the mechanical system encompasses a toggle arrangement (17), in which the toggle arrangement (17) encompasses a first lever (22) on a stationary central axis (14) fixed to the seat (3) and a second lever (23) articulated on a stationary axis of rotation (19) on the seat support (7), in which both levers (22, 23) are articulatedly connected to each other on a shiftable axis of rotation (20) and in which means (18, 25, 26, 27, 28) are provided for connecting the shiftable axis of rotation (20) with the seat (3), characterised in that the shiftable axis of rotation (20) is connected to a torsion bar (18) via a telescopable element (25, 26, 27) and a further lever (28), in which the further lever (28) is connected to the torsion bar (18) in a manner in which twisting is prevented.
  2. Chair according to claim 1, characterised in that the telescopable element is constituted by a pin (26), which can be introduced into a receiving element (25) against the force of a compression spring (27).
  3. Chair according to claim 1 or 2, characterised in that a mechanical system is provided for adjusting the tilt of a backrest (2).
  4. Chair according to claim 3, characterised in that the backrest (2) is connected to a slide block (11) via a backrest support (8), the slide block being shiftably supported on the seat (3).
  5. Chair according to claim 4, characterised in that an arcuate bar (12) is provided, which is supported on the slide block (11).
  6. Chair according to claim 4 or 5, characterised in that a slide block (11) respectively is attached to one side of the seat (3) opposite to the other slide block (11) and that both slide blocks (11) are fixed to the central axis (14) via one fastener each (13).
  7. Chair according to claim 6, characterised in that the first lever (22) of the toggle arrangement (17) is connected to the rotatable central axis (14) in a torque proof manner.
  8. Chair according to claim 4 to 6, characterised in that a gas spring (16) is provided for locking the slide block (11).
EP05015402A 2004-10-18 2005-07-15 Chair Active EP1647207B1 (en)

Priority Applications (1)

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PL05015402T PL1647207T3 (en) 2004-10-18 2005-07-15 Chair

Applications Claiming Priority (1)

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DE102004050853A DE102004050853A1 (en) 2004-10-18 2004-10-18 chair

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EP1647207A1 EP1647207A1 (en) 2006-04-19
EP1647207B1 true EP1647207B1 (en) 2008-03-05

Family

ID=35588918

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EP05015402A Active EP1647207B1 (en) 2004-10-18 2005-07-15 Chair

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US (1) US7431397B2 (en)
EP (1) EP1647207B1 (en)
CN (1) CN100473307C (en)
AT (1) ATE387873T1 (en)
DE (2) DE102004050853A1 (en)
DK (1) DK1647207T3 (en)
ES (1) ES2300905T3 (en)
HK (1) HK1090264A1 (en)
PL (1) PL1647207T3 (en)
PT (1) PT1647207E (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20070944A1 (en) * 2007-05-09 2008-11-10 L & P Property Management Co SEAT ADJUSTMENT DEVICE, PARTICULARLY FOR ADJUSTABLE CHAIRS.
DE102008007569A1 (en) 2008-02-05 2009-08-06 Wilkhahn Wilkening + Hahne Gmbh + Co. Seating furniture i.e. office chair, has lever system formed according to type of toggle lever system, and adjustment unit causing change of mechanical hinge of spring element to lever system without changing deformation of spring unit
MY192314A (en) * 2012-09-05 2022-08-17 Godrej & Boyce Mfg Co Ltd Chair with adjustable backrest and seat
US9713381B2 (en) 2015-06-11 2017-07-25 Davis Furniture Industries, Inc. Chair
US10383448B1 (en) 2018-03-28 2019-08-20 Haworth, Inc. Forward tilt assembly for chair seat

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Publication number Priority date Publication date Assignee Title
DE8529663U1 (en) * 1985-10-18 1987-11-19 Klöber GmbH & Co, 7770 Überlingen Work chair with tilt mechanism of seat shell and backrest
NO160896C (en) * 1986-05-09 1989-06-14 Jurek Buchacz ADJUSTABLE SEATING DEVICE.
DE3727784A1 (en) * 1987-08-20 1989-03-02 Kloeber Gmbh & Co WORK CHAIR WITH SWIVELING SEAT SHELL
US4966411A (en) * 1987-10-24 1990-10-30 Kokuyo Co., Ltd. Chair provided with a backrest
US4892354A (en) * 1989-06-30 1990-01-09 Shepherd Products U.S., Inc. Chair seat tilt control
DE9002416U1 (en) * 1990-03-02 1990-05-03 Roeder GmbH, 6000 Frankfurt Work chair with a seat support and a backrest support
US5207479A (en) * 1990-06-06 1993-05-04 Kimball International, Inc. Chair control mechanism
CA2116079C (en) * 1993-02-22 2005-12-27 Benjamin Cowan Chair
US5511852A (en) * 1993-02-25 1996-04-30 Herman Miller, Inc. Adjustable backrest for a chair
US5388889A (en) * 1993-09-23 1995-02-14 Westinghouse Electric Corporation Torque control mechanism for chairs
DE4403123C2 (en) 1994-02-02 2003-06-18 Link Wilhelm Kg Chair, especially office chair
DE29704906U1 (en) 1997-03-18 1997-05-22 Interstuhl Büromöbel GmbH & Co. KG, 72469 Meßstetten Chair, especially office chair
US6644741B2 (en) * 2001-09-20 2003-11-11 Haworth, Inc. Chair
US20030132653A1 (en) * 2001-10-18 2003-07-17 Doug Thole Tension control mechanism for a chair

Also Published As

Publication number Publication date
HK1090264A1 (en) 2006-12-22
ATE387873T1 (en) 2008-03-15
PT1647207E (en) 2008-04-28
PL1647207T3 (en) 2008-07-31
US7431397B2 (en) 2008-10-07
CN1762285A (en) 2006-04-26
DE102004050853A1 (en) 2006-04-20
ES2300905T3 (en) 2008-06-16
US20060082201A1 (en) 2006-04-20
DK1647207T3 (en) 2008-06-30
CN100473307C (en) 2009-04-01
DE502005003069D1 (en) 2008-04-17
EP1647207A1 (en) 2006-04-19

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