EP0372232B1 - Chair, in particular a work or office chair - Google Patents

Chair, in particular a work or office chair Download PDF

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Publication number
EP0372232B1
EP0372232B1 EP89120480A EP89120480A EP0372232B1 EP 0372232 B1 EP0372232 B1 EP 0372232B1 EP 89120480 A EP89120480 A EP 89120480A EP 89120480 A EP89120480 A EP 89120480A EP 0372232 B1 EP0372232 B1 EP 0372232B1
Authority
EP
European Patent Office
Prior art keywords
seat
axis
backrest
chair
inclination
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
EP89120480A
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German (de)
French (fr)
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EP0372232A1 (en
Inventor
Heinrich Korn
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.)
Haworth Buroeinrichtungen GmbH
Original Assignee
Roeder GmbH
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Publication date
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Priority to AT89120480T priority Critical patent/ATE83625T1/en
Publication of EP0372232A1 publication Critical patent/EP0372232A1/en
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Publication of EP0372232B1 publication Critical patent/EP0372232B1/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
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • 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

Definitions

  • the invention relates to a chair, in particular work or office chair, with a seat which can be changed in inclination and with a backrest which can be changed in proportion to the inclination, depending on the change in inclination of the seat, in which, with increasing inclination of the seat, the backrest with respect to the facing end of the seat performs an additional relative movement, in which swivel levers are arranged on both sides of the support arms of the chair frame, the upper ends of which are firmly and non-rotatably connected to and support the backrest, in which the articulation axis of the seat in the region of its front edge by means of an elongated hole Guides limited adjustable and rotatable at the ends of the support arms, in which the swivel levers are non-adjustable and rotatably connected to the seat and in which the swivel levers with the lower ends are rotatably mounted on the chair frame, the axis of rotation being lower than the hinges kaxis of the seat on the support
  • Such a chair is known from DE-GM 86 16 836.
  • the pivot levers are articulated to the central column of the chair frame and the axis of rotation between the pivot levers and the seat lies in the rear area of the seat, so that the pivot levers are for the most part below the seat and are therefore not designed directly as armrests or armrests and can be used.
  • the slots of the slot guides run horizontally, so that the front area of the seat with increasing inclination performs an upward movement, which worsens the seating comfort, particularly in the area of the hollow of the knee, and leads to a pressure edge.
  • a chair is known in which the swivel levers are articulated in the front area of the support arms of the chair frame.
  • the front area of the seat is attached to the support arms using the carrying lever.
  • This articulation of the swivel lever and the design of the adjusting device allows the swivel lever to be used as armrests or armrests, but the guidance of the front area of the seat via the entraining lever does not allow a clear and defined lowering of the front seat area, especially with larger tolerances of the swivel joints.
  • pivot levers are designed as armrests or are connected to them, that the axis of rotation of the lower ends of the pivot levers are arranged below the articulation axis of the seat, and that the elongated holes of the elongated hole guides face the front of the seat are increasing.
  • the guidance of the front seating area by means of the elongated hole guides results in a defined lowering, whereby there is no need for the carrying levers and the adjustment device is simplified and becomes even more reliable.
  • the swivel levers can be used as armrests or armrests, as they are mostly above the seat. In this articulation on the chair frame and the seat, the swivel levers bring about the relative movement of the backrest and seat, which is necessary to avoid the pull-out effect when the backrest inclination is increased.
  • the elongated hole guides are arranged approximately perpendicularly above the pivot axis of the pivoting levers, then the support arms are guided approximately vertically upwards in the end regions.
  • the support arms can also be straight if the configuration is such that the elongated hole guides are offset from the pivot axis of the pivoting lever toward the front of the seat.
  • the comfort in the area of the hollow of the knees can be improved in a simple manner by the fact that the seat in the front area ends in an end section falling towards the base of the chair, the elongated hole guides being arranged in the area of the end section.
  • FIGS. 1 and 2 only the upper end of the central column 10 of a chair frame is shown, on which support arms 11 extend forward.
  • support arms 11 which can also be combined, two pivot levers 13 designed as armrests or armrests are rotatably mounted in a pivot axis 12.
  • the other ends of the pivot levers 13 are mounted on both sides of the backrest 15 in fixed fastening points 14 so that when the inclination of the pivot levers 13 changes, the inclination of the entrained backrest 15 to the vertical also changes.
  • the seat 16 ends in the front region in an end section 17 which is inclined towards the standing surface.
  • the pivot levers 13 each have a mounting bracket 19, via which they are rotatably mounted on the seat 16 about an axis of rotation 18, which is below the connecting line between the pivot axis 12 of the pivot levers 13 on the support arms 11 and the fixed attachment points 14 of the pivot levers 13 on the backrest 15 lies.
  • the seat 16 is supported on the support arms 11 in an axis of rotation 21 by means of elongated hole guides which are formed by bearing bolts can be, which are guided in slots 20 of the support arms 11 and are limited adjustable.
  • the elongated holes 20 are introduced into extensions 22 of the support arms 11 and lie vertically above the articulation axis 12 of the pivot levers 13, whereby they rise towards the front.
  • the front edge of the seat which is formed by the transition between the seat 16 and the end section 17, is additionally lowered in the direction of the standing surface when the seat 16 is lowered, ie, its inclination is increased.
  • the displacement of the front edge of the seat in the direction of the backrest 15 is negligible.
  • the axis of rotation 21 ' is placed at the transition from the seat 16 to the end section 17.
  • the length and the inclination of the elongated holes 20 determine the lowering movement of the front seat edge and also the two end positions of the seat 16, by abutment of the bearing bolts 21 at the ends of the elongated holes 20.
  • the axis of rotation changes the position in the elongated holes 20, like the axes of rotation 21 and 21 'show.
  • the axis of rotation 21 ′ lies over the end section 17, as the bearing plates 24 show.
  • the elongated holes 20 are also offset toward the front with respect to the articulation axis 12 of the pivot levers 13 on the support arms 11 and designed to rise towards the front.
  • the axis of rotation 21 ' is located in the region of the ends of the elongated holes 20 facing the front and adjusts when the seat 16 is lowered into the region of the ends of the elongated holes 20 facing the rear, so that when the seat 16 is lowered the front edge of the seat is lowered with. Due to the simultaneous adjustment of the seat 16 in the direction of the backrest 15, in conjunction with the displacement of the axis of rotation 18 between the seat 16 and the pivot levers 13 via the connecting line between the articulation axis 12 and the fixed fastening points 14, a countermovement of the end facing the backrest 15 the seat 16 reached.
  • the axis of rotation 21 'and the axis of rotation 18 lie approximately in a horizontal plane, while in the lower end position of the seat 16, the axis of rotation 18 is pivoted below the axis of rotation 21 '.
  • the elongated holes 20 determine these end positions and, with their dimensions and their inclination, determine the guided and defined lowering path of the front seat edge.
  • the pivot levers 13 are designed as armrests or armrests or are provided with them.
  • the exemplary embodiments show that no driving levers and driving lever joints are required in order to effect all the adjustment means required for the desired relative movements between the seat, backrest and chair frame by these parts themselves. It depends solely on the arrangement of the elongated holes 20 in the support arms 11 or the seat 16 or the pivot levers 13 and their dimensions and orientation as well as the position of the axis of rotation 18 between the seat 16 and the pivot levers 13 to the connecting line between the pivot axis 12 of the pivot levers 13 on the support arms 11 and the fixed attachment points 14 of the pivot lever 13 on the backrest 15.

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  • 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)
  • Plural Heterocyclic Compounds (AREA)

Abstract

The invention relates to a chair, in particular a work or office chair, having a seat (16), which can be swivelled in the front region about a horizontal swivel axis (12) and can be altered in inclination, and having a backrest (15), which can be altered inevitably overproportionally in inclination in dependence on the alteration of the inclination of the seat, in which, with increasing inclination of the seat, the backrest executes an additional relative movement in relation to the end of the seat facing it, in which swivel levers (13) are attached on both sides of the seat on supporting arms of the seat frame, the free ends of which swivel levers are mounted fixedly and non-rotatably on the backrest (15) and support the latter, and in which the seat (16) is connected rotatably in its central region to the swivel levers (13). The desired relative movements between the seat, the backrest and the chair frame can only be implemented and varied by the coupling between the seat, the backrest, swivel levers constructed as arm supports or armrests and the chair frame by the fact that, in the region of its front edge offset upwards in relation to the attachment axis of the swivel levers, the seat is mounted rotatably on extensions of the supporting arms so as to be non- adjustable or limitedly adjustable, and that the axis of rotation between the swivel levers and the seat is limitedly adjustable or non- adjustable. <IMAGE>

Description

Die Erfindung betrifft einen Stuhl, insbesondere Arbeits- oder Bürostuhl, mit einem in der Neigung veränderbaren Sitz und mit einer in Abhängigkeit von der Neigungsänderung des Sitzes zwangsweise in der Neigung überproportional veränderbaren Rückenlehne, bei dem mit zunehmender Neigung des Sitzes die Rückenlehne gegenüber dem zugekehrten Ende des Sitzes eine zusätzliche Relativbewegung ausführt, bei dem zu beiden Seiten an zur Vorderseite gerichteten Tragarmen des Stuhlgestelles Schwenkhebel angeordnet sind, deren obere Enden fest und unverdrehbar mit der Rückenlehne verbunden sind und diese tragen, bei dem die Anlenkachse des Sitzes im Bereich seiner Vorderkante mittels Langloch-Führungen begrenzt verstellbar und drehbar an den Enden Tragarme gelagert ist, bei dem die Schwenkhebel unverstellbar und drehbar mit dem Sitz verbunden sind und bei dem die Schwenkhebel mit den unteren Enden an dem Stuhlgestell drehbar gelagert sind, wobei die Drehachse tiefer liegt als die Anlenkachse des Sitzes an den Tragarmen.The invention relates to a chair, in particular work or office chair, with a seat which can be changed in inclination and with a backrest which can be changed in proportion to the inclination, depending on the change in inclination of the seat, in which, with increasing inclination of the seat, the backrest with respect to the facing end of the seat performs an additional relative movement, in which swivel levers are arranged on both sides of the support arms of the chair frame, the upper ends of which are firmly and non-rotatably connected to and support the backrest, in which the articulation axis of the seat in the region of its front edge by means of an elongated hole Guides limited adjustable and rotatable at the ends of the support arms, in which the swivel levers are non-adjustable and rotatably connected to the seat and in which the swivel levers with the lower ends are rotatably mounted on the chair frame, the axis of rotation being lower than the hinges kaxis of the seat on the support arms.

Ein derartiger Stuhl ist aus dem DE-GM 86 16 836 bekannt. Bei diesem bekannten Stuhl sind die Schwenkhebel an der mittigen Säule des Stuhlgestelles angelenkt und die Drehachse zwischen den Schwenkhebeln und dem Sitz liegt im hinteren Bereich des Sitzes, so daß die Schwenkhebel zum überwiegenden Teil unterhalb des Sitzes liegen und daher nicht direkt als Armlehne oder Armstütze ausgebildet und verwendet werden können. Darüberhinaus verlaufen die Langlöcher der Langloch-Führungen horizontal, so daß der vordere Bereich des Sitzes mit zunehmender Neigung eine Bewegung nach oben ausführt, was den Sitzkomfort insbesondere im Bereich der Kniekehlen verschlechtert und zu einer Druckkante führt.Such a chair is known from DE-GM 86 16 836. In this known chair, the pivot levers are articulated to the central column of the chair frame and the axis of rotation between the pivot levers and the seat lies in the rear area of the seat, so that the pivot levers are for the most part below the seat and are therefore not designed directly as armrests or armrests and can be used. In addition, the slots of the slot guides run horizontally, so that the front area of the seat with increasing inclination performs an upward movement, which worsens the seating comfort, particularly in the area of the hollow of the knee, and leads to a pressure edge.

Aus dem DE-GM 88 06 835 ist ein Stuhl bekannt, bei dem die Schwenkhebel im vorderen Bereich der Tragarme des Stuhlgestelles angelenkt sind. Der vordere Bereich des Sitzes wird über Mitführhebel an den Tragarmen angebracht. Diese Anlenkung der Schwenkhebel und Ausgestaltung der Verstelleinrichtung läßt wohl eine Ausnützung der Schwenkhebel als Armlehnen oder Armstüzen zu, aber die Führung des vorderen Bereiches des Sitzes über die Mitführhebel läßt insbesondere bei größeren Toleranzen der Drehgelenke keine eindeutige und definierte Absenkung des vorderen Sitzbereiches zu.From DE-GM 88 06 835 a chair is known in which the swivel levers are articulated in the front area of the support arms of the chair frame. The front area of the seat is attached to the support arms using the carrying lever. This articulation of the swivel lever and the design of the adjusting device allows the swivel lever to be used as armrests or armrests, but the guidance of the front area of the seat via the entraining lever does not allow a clear and defined lowering of the front seat area, especially with larger tolerances of the swivel joints.

Es ist Aufgabe der Erfindung, einen Stuhl der eingangs erwähnten Art zu schaffen, der unter Beibehaltung der Relativbewegung von Rückenlehne und Sitz beim Rückwärtsneigen der Rückenlehne und der Ausnützung der Schwenkhebel als Armlehnen oder Armstützen eine eindeutige und definierte Führung des vorderen Sitzbereiches bringt, die sicher zu einer Absenkung des vorderen Sitzbereiches führt, wenn die Rückenlehne aus der Ausgangsstellung nach rückwärts geneigt wird.It is an object of the invention to provide a chair of the type mentioned which, while maintaining the relative movement of the backrest and seat when tilting the backrest backwards and utilizing the pivoting levers as armrests or armrests, brings a clear and defined guidance of the front seat area, which is sure to a lowering of the front seating area leads when the backrest is tilted backwards from the starting position.

Diese Aufgabe wird nach der Erfindung dadurch gelöst, daß die Schwenkhebel als Armlehnen ausgebildet oder mit diesen verbunden sind, daß die Drehachse der unteren Enden der Schwenkhebel unterhalb der Anlenkachse des Sitzes angeordnet sind, und daß die Langlöcher der Langloch-Führungen zur Vorderseite des Sitzes hin ansteigend ausgebildet sind.This object is achieved according to the invention in that the pivot levers are designed as armrests or are connected to them, that the axis of rotation of the lower ends of the pivot levers are arranged below the articulation axis of the seat, and that the elongated holes of the elongated hole guides face the front of the seat are increasing.

Die Führung des vorderen Sitzbereiches mittels der Langloch-Führungen bringt eine definierte Absenkung, wobei die Mitführhebel entfallen und die Verstelleinrichtung vereinfacht und noch betriebssicherer wird. Die Schwenkhebel können als Armlehnen oder Armstützen ausgenützt werden, da sie zum überwiegenden Teil über dem Sitz liegen. Die Schwenkhebel bringen in dieser Anlenkung am Stuhlgestell und am Sitz die Relativbewegung von Rückenlehne und Sitz, die zur Vermeidung des Auszieheffektes bei Vergrößerung der Rückenlehnenneigung erforderlich ist.The guidance of the front seating area by means of the elongated hole guides results in a defined lowering, whereby there is no need for the carrying levers and the adjustment device is simplified and becomes even more reliable. The swivel levers can be used as armrests or armrests, as they are mostly above the seat. In this articulation on the chair frame and the seat, the swivel levers bring about the relative movement of the backrest and seat, which is necessary to avoid the pull-out effect when the backrest inclination is increased.

Ist nach einer Ausgestaltung vorgesehen, daß die Langloch-Führungen etwa senkrecht über der Anlenkachse der Schwenkhebel angeordnet sind, dann sind die Tragarme in den Endbereichen etwa senkrecht nach oben geführt.If it is provided according to one embodiment that the elongated hole guides are arranged approximately perpendicularly above the pivot axis of the pivoting levers, then the support arms are guided approximately vertically upwards in the end regions.

Die Tragarme können jedoch auch gerade ausgebildet sein, wenn die Ausgestaltung so vorgenommen ist, daß die Langloch-Führungen gegenüber der Anlenkachse der Schwenkhebel zur Vorderseite des Sitzes hin versetzt sind.However, the support arms can also be straight if the configuration is such that the elongated hole guides are offset from the pivot axis of the pivoting lever toward the front of the seat.

Der Sitzkomfort läßt sich im Bereich der Kniekehlen dadurch auf einfache Weise noch verbessern, daß der Sitz im vorderen Bereich in einen zur Standfläche des Stuhles hin abfallenden Endabschnitt ausläuft, wobei die Langloch-Führungen im Bereich des Endabschnittes angeordnet sind.The comfort in the area of the hollow of the knees can be improved in a simple manner by the fact that the seat in the front area ends in an end section falling towards the base of the chair, the elongated hole guides being arranged in the area of the end section.

Die Erfindung wird anhand von in den Zeichnungen in schematischen Seitenansichten dargestellten Ausführungsbeispielen näher erläutert. Es zeigt:

Fig. 1
ein Ausführungsbeispiel eines Stuhles, bei dem sich beim Absenken des Sitzes die Rückenlehne überproportional in ihrer Neigung verändert und sich zusätzlich in Richtung zum zugekehrten Ende des Sitzes bewegt, wobei auch die vordere Sitzkante in ihrer Höhe zur Standfläche abgesenkt wird, und
Fig. 2
ein Ausführungsbeispiel eines Stuhles, bei dem die der Rückenlehne zugekehrte Oberkante des Sitzes beim Absenken desselben eine Gegenbewegung zur Absenkbewegung der Rückenlehne ausführt und die vordere Sitzkante dennoch mit abgesenkt wird.
The invention is explained in more detail with reference to exemplary embodiments shown in the drawings in schematic side views. It shows:
Fig. 1
an embodiment of a chair, in which the backrest changes disproportionately in its inclination when the seat is lowered and additionally in the direction of the facing end of the seat moves, the front edge of the seat being lowered in height to the standing surface, and
Fig. 2
an embodiment of a chair in which the upper edge of the seat facing the backrest performs a counter-movement to the lowering movement of the backrest when the same is lowered and the front seat edge is nevertheless also lowered.

Bei den Ausführungsbeispielen nach den Fig. 1 und 2 ist von einem Stuhlgestell nur das obere Ende der mittigen Säule 10 gezeigt, an dem Tragarme 11 nach vorne abgehen. An den Tragarmen 11, die auch vereinigt sein können, sind zwei als Armlehnen oder Armstützen ausgebildete Schwenkhebel 13 in einer Anlenkachse 12 drehbar gelagert. Die anderen Enden der Schwenkhebel 13 sind zu beiden Seiten der Rückenlehne 15 in festen Befestigungspunkten 14 unverdrehbar angebracht, so daß sich bei Veränderung der Neigung der Schwenkhebel 13 auch die Neigung der mitgeführten Rückenlehne 15 zur Vertikalen verändert.In the exemplary embodiments according to FIGS. 1 and 2, only the upper end of the central column 10 of a chair frame is shown, on which support arms 11 extend forward. On the support arms 11, which can also be combined, two pivot levers 13 designed as armrests or armrests are rotatably mounted in a pivot axis 12. The other ends of the pivot levers 13 are mounted on both sides of the backrest 15 in fixed fastening points 14 so that when the inclination of the pivot levers 13 changes, the inclination of the entrained backrest 15 to the vertical also changes.

Bei dem Ausführungsbeispiel nach Fig. 1 läuft der Sitz 16 im vorderen Bereich in einen zur Standfläche hin geneigten Endabschnitt 17 aus. Die Schwenkhebel 13 weisen jeweils eine Lagerlasche 19 auf, über die sie drehbar an dem Sitz 16 um eine Drehachse 18 gelagert sind, die unterhalb der Verbindungslinie zwischen der Anlenkachse 12 der Schwenkhebel13 an den Tragarmen 11 und den festen Befestigungspunkten 14 der Schwenkhebel 13 an der Rückenlehne 15 liegt. Die Lagerung des Sitzes 16 an den Tragarmen 11 erfolgt in einer Drehachse 21 mittels Langloch-Führungen, die durch Lagerbolzen gebildet sein können, welche in Langlöchern 20 der Tragarme 11 geführt und begrenzt verstellbar sind. Die Langlöcher 20 sind in Verlängerungen 22 der Tragarme 11 eingebracht und liegen vertikal über der Anlenkachse 12 der Schwenkhebel 13, wobei sie zur Vorderseite hin ansteigend sind.In the exemplary embodiment according to FIG. 1, the seat 16 ends in the front region in an end section 17 which is inclined towards the standing surface. The pivot levers 13 each have a mounting bracket 19, via which they are rotatably mounted on the seat 16 about an axis of rotation 18, which is below the connecting line between the pivot axis 12 of the pivot levers 13 on the support arms 11 and the fixed attachment points 14 of the pivot levers 13 on the backrest 15 lies. The seat 16 is supported on the support arms 11 in an axis of rotation 21 by means of elongated hole guides which are formed by bearing bolts can be, which are guided in slots 20 of the support arms 11 and are limited adjustable. The elongated holes 20 are introduced into extensions 22 of the support arms 11 and lie vertically above the articulation axis 12 of the pivot levers 13, whereby they rise towards the front.

In der Zeichnung sind die beiden Endstellungen des Sitzes 16 und eine Zwischenstellung desselben eingezeichnet. Dabei ist erkennbar, daß sich bei einer Neigungsänderung des Sitzes 16 beim Absenken desselben die Neigung der Rückenlehne 15 zur Vertikalen überproportional ändert, d.h. der Neigungswinkel der Rückenlehne 15 zur Vertikalen nimmt mehr zu als die Änderung des Neigungswinkels des Sitzes 16. Die Drehachse 21' des Sitzes 16 an den Tragarmen 11 führt dabei in den geneigten Langlöchern 20 eine Abwärtsbewegung aus, was zur Folge hat, daß mit dem Absenken des Sitzes 16 der Abstand zwischen den festen Befestigungspunkten 14 der Schwenkhebel 13 an der Rückenlehne 15 und dem zugekehrten Ende des Sitzes 16 kleiner wird, wie die Abstände a und b zeigen. Die vordere Sitzkante, die durch den Übergang zwischen dem Sitz 16 und dem Endabschnitt 17 gebildet wird, wird mit dem Absenken des Sitzes 16, d.h. Vergrößerung seiner Neigung, zusätzlich in Richtung zur Standfläche abgesenkt. Die dabei erfolgende Verschiebung der vorderen Sitzkante in Richtung zur Rückenlehne 15 fällt nicht ins Gewicht. Die Drehachse 21' ist an den Übergang vom Sitz 16 zum Endabschnitt 17 gelegt. Die Länge und die Neigung der Langlöcher 20 bestimmen die Absenkbewegung der vorderen Sitzkante und auch die beiden Endstellungen des Sitzes 16, durch Anschlag der Lagerbolzen 21 an den Enden der Langlöcher 20. Die Drehachse verändert die Lage in den Langlöchern 20, wie die Drehachsen 21 und 21' zeigen.In the drawing, the two end positions of the seat 16 and an intermediate position of the same are shown. It can be seen that with a change in the inclination of the seat 16 when lowering the same, the inclination of the backrest 15 to the vertical changes disproportionately, ie the angle of inclination of the backrest 15 to the vertical increases more than the change in the angle of inclination of the seat 16. The axis of rotation 21 'of Seat 16 on the support arms 11 performs a downward movement in the inclined oblong holes 20, which has the consequence that with the lowering of the seat 16, the distance between the fixed attachment points 14 of the pivot lever 13 on the backrest 15 and the facing end of the seat 16 becomes smaller, as the distances a and b show. The front edge of the seat, which is formed by the transition between the seat 16 and the end section 17, is additionally lowered in the direction of the standing surface when the seat 16 is lowered, ie, its inclination is increased. The displacement of the front edge of the seat in the direction of the backrest 15 is negligible. The axis of rotation 21 'is placed at the transition from the seat 16 to the end section 17. The length and the inclination of the elongated holes 20 determine the lowering movement of the front seat edge and also the two end positions of the seat 16, by abutment of the bearing bolts 21 at the ends of the elongated holes 20. The axis of rotation changes the position in the elongated holes 20, like the axes of rotation 21 and 21 'show.

Bei dem Ausführungsbeispiel nach Fig. 2 liegt nicht nur die Drehachse 18 zwischen den Schwenkhebeln 13 und dem Sitz 16 über der Verbindungslinie zwischen der Anlenkachse 12 der Schwenkhebel 13 an den Tragarmen 11 und den festen Befestigungsstellen 14 der Schwenkhebel 13 an der Rückenlehne 15, sondern auch die Drehachse 21' des Sitzes 16 am Stuhlgestell ist verändert. Die Drehachse 21' liegt über dem Endabschnitt 17, wie die Lagerlaschen 24 zeigen. Die Langlöcher 20 sind außerdem zur Vorderseite hin gegenüber der Anlenkachse 12 der Schwenkhebel 13 an den Tragarmen 11 versetzt und zur Vorderseite hin ansteigend ausgelegt. In der einen Endstellung befindet sich die Drehachse 21' im Bereich der der Vorderseite zugekenrten Enden der Langlöcher 20 und verstellt sich beim Absenken des Sitzes 16 in den Bereich der der Rückseite zugekehrten Enden der Langlöcher 20, so daß beim Absenken des Sitzes 16 die vordere Sitzkante mit abgesenkt wird. Durch die gleichzeitig stattfindende Verstellung des Sitzes 16 in Richtung zur Rückenlehne 15 wird in Verbindung mit der Verlagerung der Drehachse 18 zwischen dem Sitz 16 und den Schwenkhebeln 13 über die Verbindungslinie zwischen der Anlenkachse 12 und den festen Befestigungsstellen 14 eine Gegenbewegung des der Rückenlehne 15 zugekehrten Endes des Sitzes 16 erreicht. Damit wird der gleiche Schwenkwinkel der Schwenkhebel 13 schon bei kleinerer Veränderung des Neigungswinkels des Sitzes 16 erreicht, wie leicht durch Überlagerung der Fig. 2 auf die Fig. 1 überprüft werden kann. Dabei wird zudem der Abstand zwischen dem der Rückenlehne 15 zugekehrten Ende des Sitzes 16 und den festen Befestigungsstellen 14 der Schwenkhebel 13 an der Rückenlehne 15 stärker verändert, wie der Abstand b zeigt.In the embodiment according to FIG. 2, not only is the axis of rotation 18 between the pivot levers 13 and the seat 16 above the connecting line between the pivot axis 12 of the pivot levers 13 on the support arms 11 and the fixed attachment points 14 of the pivot levers 13 on the backrest 15, but also the axis of rotation 21 'of the seat 16 on the chair frame is changed. The axis of rotation 21 ′ lies over the end section 17, as the bearing plates 24 show. The elongated holes 20 are also offset toward the front with respect to the articulation axis 12 of the pivot levers 13 on the support arms 11 and designed to rise towards the front. In one end position, the axis of rotation 21 'is located in the region of the ends of the elongated holes 20 facing the front and adjusts when the seat 16 is lowered into the region of the ends of the elongated holes 20 facing the rear, so that when the seat 16 is lowered the front edge of the seat is lowered with. Due to the simultaneous adjustment of the seat 16 in the direction of the backrest 15, in conjunction with the displacement of the axis of rotation 18 between the seat 16 and the pivot levers 13 via the connecting line between the articulation axis 12 and the fixed fastening points 14, a countermovement of the end facing the backrest 15 the seat 16 reached. The same pivoting angle of the pivoting lever 13 is thus achieved even with a small change in the angle of inclination of the seat 16, as can easily be checked by superimposing FIG. 2 on FIG. 1. The distance between the end of the seat 16 facing the backrest 15 and the fixed fastening points 14 of the pivoting levers 13 on the backrest 15 is also changed more, as the distance b shows.

In der oberen Endstellung des Sitzes 16 liegen die Drehachse 21' und die Drehachse 18 etwa in einer horizontalen Ebene, während in der unteren Endstellung des Sitzes 16 die Drehachse 18 unter die Drehachse 21' verschwenkt wird. Die Langlöcher 20 bestimmen diese Endstellungen und bestimmen mit ihren Abmessungen und ihrer Neigung den geführten und definierten Absenkweg der vorderen Sitzkante.In the upper end position of the seat 16, the axis of rotation 21 'and the axis of rotation 18 lie approximately in a horizontal plane, while in the lower end position of the seat 16, the axis of rotation 18 is pivoted below the axis of rotation 21 '. The elongated holes 20 determine these end positions and, with their dimensions and their inclination, determine the guided and defined lowering path of the front seat edge.

Die Schwenkhebel 13 sind als Armlehnen oder Armstützen ausgebildet oder mit diesen versehen.The pivot levers 13 are designed as armrests or armrests or are provided with them.

Die Ausführungsbeispiele zeigen, daß keine Mitführhebel und Mitführhebelgelenke benötigt werden, um alle für die gewünschten Relativbewegungen zwischen Sitz, Rückenlehne und Stuhlgestell erforderlichen Verstellmittel allein durch diese Teile selbst zu bewirken. Dabei kommt es allein auf die Anordnung der Langlöcher 20 in den Tragarmen 11 bzw. dem Sitz 16 oder den Schwenkhebeln 13 und deren Abmessung und Ausrichtung sowie die Lage der Drehachse 18 zwischen dem Sitz 16 und den Schwenkhebeln 13 zur Verbindungslinie zwischen der Anlenkachse 12 der Schwenkhebel 13 an den Tragarmen 11 und den festen Befestigungsstellen 14 der Schwenkhebel 13 an der Rückenlehne 15 an.The exemplary embodiments show that no driving levers and driving lever joints are required in order to effect all the adjustment means required for the desired relative movements between the seat, backrest and chair frame by these parts themselves. It depends solely on the arrangement of the elongated holes 20 in the support arms 11 or the seat 16 or the pivot levers 13 and their dimensions and orientation as well as the position of the axis of rotation 18 between the seat 16 and the pivot levers 13 to the connecting line between the pivot axis 12 of the pivot levers 13 on the support arms 11 and the fixed attachment points 14 of the pivot lever 13 on the backrest 15.

Claims (4)

  1. Chair, in particular work or office chair, with a seat (16) whose inclination is variable, and with a backrest (15) whose inclination in automatically variable superproportionally in dependence on the alteration in inclination of the seat (16), in which, as the inclination of the seat (16) increases, the backrest (15) executes an additional relative movement with respect to the facing end of the seat (16), in which there are disposed, on both sides of the seat (16), pivot levers (13) on support arms (11) of the chair frame oriented towards the front, the upper ends of said pivot levers (13) being securely and non-rotatably connected to the backrest (15) and supporting the latter, in which the axis of articulation (21, 21') of the seat (16) is mounted to be displaceable and rotatable to a restricted degree in the region of its front edge by means of slot guides at the ends of the support arms (11), in which the pivot levers (13) are immovably and rotatably connected to the seat (16), and in which the pivot levers (13) are rotatably mounted by the lower ends on the chair frame, the axis of rotation (12) being located lower than the axis of articulation of the seat (16) on the support arms (11), characterised in that the pivot levers (13) are designed as armrests or are connected to the latter, in that the axis of rotation (12) of the lower ends of the pivot levers (13) is disposed beneath the axis of articulation (21, 21') of the seat (16), and in that the slots (20) of the slot guides are designed to incline upwards towards the front edge of the seat (16).
  2. Chair according to claim 1, characterised in that the slot guides are disposed approximately vertically above the axis of articulation (12) of the pivot levers (13) (Fig. 1).
  3. Chair according to claim 1, characterised in that the slot guides are offset, relative to the axis of articulation (12) of the pivot levers (13), in the direction of the front edge of the seat (16) (Fig. 2).
  4. Chair according to claim 3, characterised in that the seat (16) undergoes a transition in the front area into an end portion (17) inclining downwards in the direction of the floor surface of the chair, the slot guides being disposed in the region of the end portion (17).
EP89120480A 1988-11-18 1989-11-06 Chair, in particular a work or office chair Expired - Lifetime EP0372232B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89120480T ATE83625T1 (en) 1988-11-18 1989-11-06 CHAIR, ESPECIALLY WORK OR OFFICE CHAIR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3838999A DE3838999A1 (en) 1988-11-18 1988-11-18 CHAIR, ESPECIALLY WORK OR OFFICE CHAIR
DE3838999 1988-11-18

Publications (2)

Publication Number Publication Date
EP0372232A1 EP0372232A1 (en) 1990-06-13
EP0372232B1 true EP0372232B1 (en) 1992-12-23

Family

ID=6367401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89120480A Expired - Lifetime EP0372232B1 (en) 1988-11-18 1989-11-06 Chair, in particular a work or office chair

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US (1) US5575095A (en)
EP (1) EP0372232B1 (en)
JP (1) JPH0620410B2 (en)
AT (1) ATE83625T1 (en)
CA (1) CA2002948C (en)
DE (2) DE3838999A1 (en)
ES (1) ES2036782T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59107042D1 (en) * 1991-09-30 1996-01-18 Wiesner Hager Moebel Gmbh Multi-adjustable, height-adjustable chair, especially swivel chair.
US6007150A (en) 1998-03-08 1999-12-28 Milsco Manufacturing Company Motorcycle seat with adjustable backrest
US9609952B2 (en) 2012-05-04 2017-04-04 Itoki Corporation Chair, especially, office chair
WO2015161281A1 (en) 2014-04-17 2015-10-22 Hni Technologies Inc. Chair and chair control assemblies, systems, and methods

Family Cites Families (16)

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Publication number Priority date Publication date Assignee Title
US4429917A (en) * 1981-04-29 1984-02-07 Hauserman Inc. Int. Furniture & Textile Division Chair
WO1983000610A1 (en) * 1981-08-19 1983-03-03 Giroflex Entwicklungs Ag Chair
FR2533428A1 (en) * 1982-09-23 1984-03-30 Strafor Sa Seat mechanism with a differential movement for tip-up seat
DE3322450A1 (en) * 1983-06-22 1985-01-10 August Fröscher GmbH & Co KG, 7141 Steinheim Device for adjusting the seat and the backrest of chairs
ATE27763T1 (en) * 1983-10-05 1987-07-15 Giroflex Entwicklungs Ag CHAIR WITH TILTABLE SEAT AND BACKREST.
DE3429186A1 (en) * 1984-08-08 1986-02-20 Uredat-Neuhoff, Angela, 4592 Lindern SEAT, IN PARTICULAR OFFICE CHAIR
CH666171A5 (en) * 1984-10-03 1988-07-15 Giroflex Entwicklungs Ag CHAIR WITH REAR TILTABLE SEAT AND BACKREST CARRIER.
US4616877A (en) * 1985-05-09 1986-10-14 Kimball International, Inc. Chair with back height adjustment
DE8515221U1 (en) * 1985-05-23 1986-05-22 VOKO - Franz Vogt & Co, 6301 Pohlheim Seating
DE8616836U1 (en) * 1986-06-24 1987-10-22 Hartmann, Guenter, 5800 Hagen, De
DE8713972U1 (en) * 1987-10-17 1987-11-26 Nikov, Ljubomir, 6457 Maintal, De
DE3744363A1 (en) * 1987-12-29 1989-07-13 Roeder Gmbh CHAIR, ESPECIALLY WORK OR OFFICE CHAIR
DE3744365C3 (en) * 1987-12-29 1994-04-14 Roeder Gmbh Chair, in particular work or office chair
DE8806835U1 (en) * 1988-05-19 1988-09-08 Roeder Gmbh, 6000 Frankfurt, De
DE8814409U1 (en) * 1988-11-18 1989-01-26 Roeder Gmbh, 6000 Frankfurt, De
DE3916474A1 (en) * 1989-05-20 1990-11-22 Roeder Soehne Sitzmoebelfab CHAIR, ESPECIALLY WORK OR OFFICE CHAIR

Also Published As

Publication number Publication date
DE3838999A1 (en) 1990-05-23
JPH0620410B2 (en) 1994-03-23
DE3838999C2 (en) 1990-11-08
ES2036782T3 (en) 1993-06-01
US5575095A (en) 1996-11-19
EP0372232A1 (en) 1990-06-13
JPH02172410A (en) 1990-07-04
ATE83625T1 (en) 1993-01-15
DE58903114D1 (en) 1993-02-04
CA2002948A1 (en) 1990-05-18
CA2002948C (en) 1994-07-26

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