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EP0347538A1 - Chair, in particular an office chair - Google Patents

Chair, in particular an office chair Download PDF

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Publication number
EP0347538A1
EP0347538A1 EP89106441A EP89106441A EP0347538A1 EP 0347538 A1 EP0347538 A1 EP 0347538A1 EP 89106441 A EP89106441 A EP 89106441A EP 89106441 A EP89106441 A EP 89106441A EP 0347538 A1 EP0347538 A1 EP 0347538A1
Authority
EP
European Patent Office
Prior art keywords
seat
backrest
seat support
plate
chair
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89106441A
Other languages
German (de)
French (fr)
Other versions
EP0347538B1 (en
Inventor
Elke Dauphin
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.)
Buerositzmobelfabrik Friedrich-W Dauphin & Co GmbH
Original Assignee
Buerositzmobelfabrik Friedrich-W Dauphin & Co GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Buerositzmobelfabrik Friedrich-W Dauphin & Co GmbH filed Critical Buerositzmobelfabrik Friedrich-W Dauphin & Co GmbH
Priority to AT89106441T priority Critical patent/ATE69704T1/en
Publication of EP0347538A1 publication Critical patent/EP0347538A1/en
Application granted granted Critical
Publication of EP0347538B1 publication Critical patent/EP0347538B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
    • A47C31/02—Upholstery attaching means
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/446—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with fluid springs

Definitions

  • the invention relates to a chair according to the preamble of claim 1.
  • Such office chairs known from EP-OS o 179 185 have a so-called synchronous mechanism, pivoting movements of the seat part on the one hand and the backrest on the other hand mechanically coupled in such a way that the inclination changes of the seat part are generally less than the inclination changes of the backrest .
  • a force accumulator which acts to generate a restoring force in the direction of pivoting up the backrest and the seat part can generally be blocked.
  • the backrest is visually clearly separated from the seat part.
  • so-called executive chairs office chairs which have a continuous seat shell, in which the seat part and the backrest are at least externally formed in one piece and are in particular provided with a continuous upholstery cover.
  • the seat part and the backrest have a common spring steel frame which is elastically deformable in the transition region from the seat part to the backrest.
  • This frame is articulated on a seat support in the front region of the seat part by means of a pivot axis.
  • On the seat support a fixable but pivotable lever is attached, which engages the backrest. When this lever is released, the quadrilateral joint formed in this way can be pivoted, as a result of which the seat part is inclined and the backrest is tilted more backwards while deforming the seat shell.
  • the invention has for its object to provide an office chair in which a continuous seat shell is produced with simple means, which is deformable in itself.
  • the measures according to claim 5 allow the further design of the chair to a chair with armrests in a simple manner.
  • An office chair shown in Fig. 1 has a base frame 1, which is supported by rollers 2 against the floor.
  • a height-adjustable chair column 3 is attached, at the upper end of which a seat support 4 is detachably fastened, on which a continuous seat shell 7, consisting of a seat part 5 and a backrest 6, is attached in the region between the seat part 5 and the backrest 6 .
  • the height of the chair column 3 is adjusted by means of an operating lever 8 mounted in the seat support 4.
  • a further operating lever 9 is mounted on the seat support 4.
  • the seat support 4 can be partially or largely covered optically by a panel 10 attached to the underside of the seat shell 7.
  • the chair is provided with armrests 11, which are attached on the one hand in the area of the front of the seat part 5 and on the other hand in the middle height area of the backrest 6.
  • the seat bracket 4 is divided. It consists of a front seat support part 12 and a rear seat support part 13, which is open to a substantially U-shaped downward NEN cross section. It follows from this that they each have two side walls 14, 15 and 16, 17, which are each connected to one another by floors 5 facing floors 18 and 19.
  • the two seat support parts 12, 13 are connected to one another by a pivot axis 2o arranged adjacent to their upper floors 18, 19. The pivot axis 2o is therefore in the upper region of the two seat support parts 12, 13.
  • a front seat holder 21 is attached so as to be pivotable about a pivot axis 22 parallel to the pivot axis 20.
  • the seat bracket 21 is replaced by a crosswise to the main plane of symmetry of the chair, i.e. 2 C-profile formed transversely to the plane of the drawing.
  • a rigid seat plate 23 which forms the core of the seat part 5, is supported and fastened via rubber buffers 24.
  • the seat plate 23 is also supported and fastened in its rear area facing the backrest 6 via rubber buffers 25 on a rear seat holder 26, which is also supported by a plane transverse to the main plane of symmetry of the chair, i.
  • An angle profile extending transversely to the plane of the drawing in FIG. 2 is formed.
  • a length-adjustable energy store in the form of a length-adjustable gas spring 27 is articulated about a pivot axis 28 which leads to the pivot axes 2o and 22 runs parallel.
  • the housing 29 of the gas spring 27 faces the pivot axis 28, from the other end of which a piston rod 30 is led out.
  • An actuating pin 31 protrudes from this piston rod 3o, by means of which a valve in the gas spring can be actuated for length adjustment.
  • the piston rod 3o is connected by a thread to an actuating device 32, to which the actuating lever 9 belongs.
  • This actuating device 32 is pivotably mounted between the side walls 14, 15 of the front seat support part 12 parallel to the pivot axes 2o, 22, 28.
  • the actuating lever 9 is led out through an elongated hole 33 in the associated side wall 16 of the rear seat support part 13, this elongated hole 33 being curved in such a way that its center coincides with the pivot axis 20.
  • a bearing block 34 designed in the manner of a box profile is fastened, in which a downwardly widening and downwardly open conical sleeve 35 is formed.
  • the chair column 3 is detachably fastened in this cone sleeve 35.
  • the actuating lever 8 is arranged above the bearing block 34.
  • the front and rear seat support parts 12 and 13 are pivoted relative to one another about the pivot axis 2o, the front seat support part 12 not changing its position, ie the rear one, because of the rigid — albeit detachable — connection to the chair column 3
  • Seat support part 13 is changed in its inclination. Through this the inclination of the seat plate 23 is simultaneously changed in its inclination.
  • the height-adjustable chair column 3 is known, for example, from DE-PS 19 31 o12 (corresponding to US Pat. No. 3,711,054) or DE-PS 18 12 282 (corresponding to US Pat. No. 3,656,593).
  • the structure of the seat support including the described pivoting possibility is known for example from EP-OS o 179 185 (corresponding to ZA-PS 85/6126).
  • the structure and arrangement of the actuating device 32 and the gas spring 27 are known from EP-OS o 179 216 (corresponding to US Pat. No. 4,662,488).
  • a fork-shaped bracket 36 is attached to the rear seat holder 26, that is to say in the rear region of the rear seat support part 13. It has a transverse web 37 which extends transversely to the main symmetry plane of the chair and is fastened to the rear seat holder 13 by means of screws 38. Arms 39, which are bent parallel to one another and extend from the approximately horizontal position of the cross bar 37, extend backwards and upwards from the two lateral ends of this cross bar 37. At the upper ends of these arms, a rigid backrest plate 4o is fastened by means of screws 41, which forms the core of the backrest 6.
  • the arms 39 have - as can be seen in particular in FIG.
  • the seat plate 23 in their area adjoining the transverse web 37 a section 42 which runs obliquely backwards and upwards.
  • the seat plate 23 also has an obliquely running backwards and upwards Section 43, which lies essentially between or laterally next to the sections 42 of the arms 39.
  • the arms 39 with their sections 42 lie approximately in the rear section 43 of the seat plate 23.
  • an upper section 44 extends upwards, at the upper ends of which the backrest plate 4o is fastened.
  • the bracket 36 as a whole and in particular the curved arms 39 are rigid in themselves.
  • the arms 39 consist of sufficiently thick flat steel. Between the two arms are some connecting strips 45 running parallel to the crossbar 37.
  • the seat shell 7 is continuously provided on its top with a cushion pad 46, for example made of foam, i.e. this covers the backrest 6, the opening 47 located between the backrest plate 40 and the seat plate 23 and delimited by the arms 39 of the bracket 36 and the top of the seat plate 23.
  • the connecting bars 45 bridging the opening 47 prevent this cushion pad 46 from being pushed through to the rear of the chair.
  • the back of the backrest plate 4o and the back of the opening 47 are provided with a cushion pad 48.
  • the cushion pads 46, 48 are covered with a cushion cover 49, which therefore covers the entire inside of the seat shell 7 and the back of the backrest 6 up to the area of the seat support 4.
  • the seat support 4 is a so-called synchronous mechanism, ie when the gas spring 27 is adjusted in length, on the one hand the inclination of the seat plate 23 and thus the seat part 5 and on the other hand the inclination of the backrest plate 4o and so that the backrest 6 on the other hand changed.
  • 3 shows that when the backrest 6 is pivoted back, its inclination is changed more than the inclination of the seat part 5.
  • the seat plate 23 and the backrest plate 4o are each in their most high position for illustration purposes. or shown in the forward pivoted position and drawn in dash-dotted lines in their pivoted downward or rearward position.
  • the armrests 11 are flexible in themselves, i.e. during the described pivoting movements of the backrest 6, they can deform elastically, in particular in the strongly curved transition section 5o between the approximately vertical support section 51 and the approximately horizontal armrest section 52 Underside of the seat plate 23 or attached to the backrest plate in the region of the upper end of the arms 39.
  • the actuating device 32 can be blocked in such a way that the actuating pin 31 of the gas spring 27 is constantly pushed into it so that its inner valve is constantly open, then can be rocked with the chair under constant repeated deformation of the seat shell 7.

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  • Chairs Characterized By Structure (AREA)

Abstract

A chair has a seat support (4), the rear seat support part (13) of which is linked to the front seat support part (12) by means of a swivel axis (20). An energy accumulator is linked between the front and the rear seat support parts (12, 13). A seat plate (23) is supported on the two seat support parts (12, 13). Mounted on the rear seat support part (13) by means of a rigid backrest support is a backrest plate (40). Both are provided with a cushion (46). In order to produce by simple means a continuous seat shell which is inherently deformable, the backrest support is constructed by a yoke (36) having two arms (39) extending parallel to each other and projecting upwards, on which arms the backrest plate (40) is mounted. Furthermore, the backrest plate (40) and the seat plate (5) and an opening (47), situated between the two and laterally bounded essentially by the arms (39), are covered by a continuous cushion (46) and a continuous cushion cover (49). <IMAGE>

Description

Die Erfindung betrifft einen Stuhl nach dem Oberbe­griff des Anspruches 1.The invention relates to a chair according to the preamble of claim 1.

Derartige aus der EP-OS o 179 185 bekannte Bürostühle weisen eine sogenannte Synchron-Mechanik auf, wobei Verschwenkbewegungen des Sitzteils einerseits und der Rückenlehne andererseits mechanisch in der Weise ge­koppelt sind, daß die Neigungsveränderungen des Sitz­teils in der Regel geringer sind als die Neigungsver­änderungen der Rückenlehne. Ein zur Erzeugung einer Rückstellkraft in Richtung auf das Hochschwenken der Rückenlehne und des Sitzteils wirkender Kraftspeicher kann in der Regel blockiert werden. Bei derartigen Stühlen ist die Rückenlehne optisch deutlich vom Sitz­teil getrennt.Such office chairs known from EP-OS o 179 185 have a so-called synchronous mechanism, pivoting movements of the seat part on the one hand and the backrest on the other hand mechanically coupled in such a way that the inclination changes of the seat part are generally less than the inclination changes of the backrest . A force accumulator which acts to generate a restoring force in the direction of pivoting up the backrest and the seat part can generally be blocked. In chairs of this type, the backrest is visually clearly separated from the seat part.

Es sind weiterhin als sogenannte Chefsessel ausgebil­dete Bürostühle bekannt, die eine durchgehende Sitz­schale aufweisen, bei der also das Sitzteil und die Rückenlehne zumindest äußerlich einteilig ausgebildet sind und insbesondere mit einem durchgehenden Polster­bezug versehen sind. Hierbei ist eine Ausführung be­kannt, bei der der Sitzteil und die Rückenlehne einen gemeinsamen Federstahlrahmen aufweisen, der im Über­gangsbereich vom Sitzteil zur Rückenlehne elastisch verformbar ist. Dieser Rahmen ist im vorderen Bereich des Sitzteils auf einem Sitzträger mittels einer Schwenkachse angelenkt. An dem Sitzträger ist weiter­hin ein fixierbarer aber in gelöstem Zustand schwenk­barer Hebel angebracht, der an der Rückenlehne an­greift. Wenn dieser Hebel gelöst ist, kann das auf diese Weise gebildete Gelenkviereck verschwenkt wer­den, wodurch der Sitzteil geneigt und die Rückenlehne unter Verformung der Sitzschale stärker nach hinten geneigt wird. Diese Lösung ist sehr elegant aber sehr aufwendig.There are also known as so-called executive chairs office chairs which have a continuous seat shell, in which the seat part and the backrest are at least externally formed in one piece and are in particular provided with a continuous upholstery cover. Here, an embodiment is known in which the seat part and the backrest have a common spring steel frame which is elastically deformable in the transition region from the seat part to the backrest. This frame is articulated on a seat support in the front region of the seat part by means of a pivot axis. On the seat support a fixable but pivotable lever is attached, which engages the backrest. When this lever is released, the quadrilateral joint formed in this way can be pivoted, as a result of which the seat part is inclined and the backrest is tilted more backwards while deforming the seat shell. This solution is very elegant but very complex.

Der Erfindung liegt die Aufgabe zugrunde, einen Büro­stuhl zu schaffen, bei dem mit einfachen Mitteln eine durchgehende Sitzschale erzeugt wird, die in sich ver­formbar ist.The invention has for its object to provide an office chair in which a continuous seat shell is produced with simple means, which is deformable in itself.

Diese Aufgabe wird erfindungsgemäß bei einem Stuhl nach dem Oberbegriff des Anspruches 1 mit den Merk­malen des Kennzeichnungsteiles des Anspruches 1 ge­löst. Durch die erfindungsgemäßen Maßnahmen ist es in überraschend einfacher Weise gelungen, die bekannte Synchronmechanik für Stühle mit voneinander unabhängi­ gem Sitzteil und Rückenlehne so umzugestalten, daß eine äußerlich flexible Sitzschale geschaffen wird, die eine Synchron-Verschwenkbarkeit von Sitzteil und Rückenlehne aufweist, ohne daß es hierzu einer flexib­len Ausgestaltung der Sitzschale selber bedarf. Ins­besondere durch die Weiterbildung nach Anspruch 2 wird erreicht, daß die Sitzschale optisch keine Gelenk­stelle erhält, sondern auch im hinteren Übergangsbe­reich zwischen Sitzteil und Rückenlehne einerseits in sich fest, andererseits aber verformbar bleibt. Dieser Effekt wird durch die Weiterbildung nach Anspruch 3 noch verbessert. Durch die weiteren Maßnahmen nach An­spruch 4 wird sichergestellt, daß die Polsterung im Bereich zwischen Sitzplatte und Rückenlehnenplatte sich nicht durch den als Rückenlehnenträger dienenden Bügel hindurchdrücken kann.This object is achieved in a chair according to the preamble of claim 1 with the features of the characterizing part of claim 1. The measures according to the invention have succeeded in a surprisingly simple manner in making the known synchronous mechanism for chairs independent of one another according to the seat part and backrest so that an externally flexible seat shell is created which has a synchronous pivoting of the seat part and backrest without the need for a flexible design of the seat shell itself. In particular, through the development according to claim 2 it is achieved that the seat shell optically does not receive a joint, but also in the rear transition area between the seat part and backrest on the one hand in itself, but on the other hand remains deformable. This effect is further improved by the training according to claim 3. The further measures according to claim 4 ensure that the padding in the area between the seat plate and backrest plate cannot press through the bracket serving as a backrest support.

Die Maßnahmen nach Anspruch 5 ermöglichen in einfacher Weise die weitere Ausgestaltung des Stuhles zu einem Sessel mit Armlehnen.The measures according to claim 5 allow the further design of the chair to a chair with armrests in a simple manner.

Weitere Einzelheiten und Vorteile der Erfindung erge­ben sich aus der nachfolgenden Beschreibung eines Aus­führungsbeispiels anhand der Zeichnung. Es zeigt

  • Fig. 1 einen Bürostuhl nach der Erfindung in einer perspektivischen vereinfachten Darstellung,
  • Fig. 2 den Sitzträger des Stuhls in einer teilweise aufgebrochenen Seitenansicht,
  • Fig. 3 eine Seitenansicht des Sitzträgers einschließ­lich Sitzschale in zwei verschiedenen Schwenk­stellungen und
  • Fig. 4 eine Teil-Draufsicht auf die Sitzschale des Stuhles ohne Polsterbezug und Polsterauflage.
Further details and advantages of the invention result from the following description of an exemplary embodiment with reference to the drawing. It shows
  • 1 is an office chair according to the invention in a perspective simplified representation,
  • 2 shows the seat support of the chair in a partially broken side view,
  • Fig. 3 is a side view of the seat support including seat shell in two different pivot positions and
  • Fig. 4 is a partial plan view of the seat shell of the chair without upholstery and upholstery.

Ein in Fig. 1 dargestellter Bürostuhl weist ein Fußge­stell 1 auf, das über Rollen 2 gegenüber dem Boden ab­gestützt ist. An dem Fußgestell 1 ist eine höhenver­stellbare Stuhlsäule 3 angebracht, an deren oberem Ende ein Sitzträger 4 lösbar befestigt ist, auf dem eine durchgehende, aus einem Sitzteil 5 und einer Rückenlehne 6 bestehende, im Bereich zwischen Sitzteil 5 und Rückenlehne 6 flexible Sitzschale 7 angebracht ist. Die Höhenverstellung der Stuhlsäule 3 erfolgt mittels eines im Sitzträger 4 gelagerten Bedienungs­hebels 8. Zur Veränderung der Neigung der Rückenlehne 6 unter gleichzeitigem Verändern der Neigung des Sitz­teiles 5 ist ein weiterer Bedienungshebel 9 am Sitz­träger 4 gelagert. Der Sitzträger 4 kann teilweise oder weitgehend durch eine an der Unterseite der Sitzschale 7 angebrachte Verkleidung 1o optisch abge­deckt sein. Der Stuhl ist mit Armlehnen 11 versehen, die einerseits im Bereich der Vorderseite des Sitz­teils 5 und andererseits im mittleren Höhenbereich der Rückenlehne 6 angebracht sind.An office chair shown in Fig. 1 has a base frame 1, which is supported by rollers 2 against the floor. On the foot frame 1, a height-adjustable chair column 3 is attached, at the upper end of which a seat support 4 is detachably fastened, on which a continuous seat shell 7, consisting of a seat part 5 and a backrest 6, is attached in the region between the seat part 5 and the backrest 6 . The height of the chair column 3 is adjusted by means of an operating lever 8 mounted in the seat support 4. In order to change the inclination of the backrest 6 while simultaneously changing the inclination of the seat part 5, a further operating lever 9 is mounted on the seat support 4. The seat support 4 can be partially or largely covered optically by a panel 10 attached to the underside of the seat shell 7. The chair is provided with armrests 11, which are attached on the one hand in the area of the front of the seat part 5 and on the other hand in the middle height area of the backrest 6.

Wie aus Fig. 2 hervorgeht, ist der Sitzträger 4 ge­teilt ausgebildet. Er besteht aus einem vorderen Sitz­trägerteil 12 und einem hinteren Sitzträgerteil 13, die einen im wesentlichen U-förmigen nach unten offe­ nen Querschnitt aufweisen. Daraus folgt, daß sie je­weils zwei Seitenwände 14,15 bzw. 16,17 aufweisen, die jeweils durch dem Sitz 5 zugewandte Böden 18 bzw. 19 miteinander verbunden sind. Die beiden Sitzträgerteile 12,13 sind durch eine benachbart zu ihren obenliegen­den Böden 18,19 angeordnete Schwenkachse 2o miteinan­der verbunden. Die Schwenkachse 2o befindet sich also im oberen Bereich der beiden Sitzträgerteile 12,13.As is apparent from Fig. 2, the seat bracket 4 is divided. It consists of a front seat support part 12 and a rear seat support part 13, which is open to a substantially U-shaped downward NEN cross section. It follows from this that they each have two side walls 14, 15 and 16, 17, which are each connected to one another by floors 5 facing floors 18 and 19. The two seat support parts 12, 13 are connected to one another by a pivot axis 2o arranged adjacent to their upper floors 18, 19. The pivot axis 2o is therefore in the upper region of the two seat support parts 12, 13.

Am Vorderende des vorderen Sitzträgerteils 12 des Sitzträgers 4 ist eine vordere Sitzhalterung 21 um eine zur Schwenkachse 2o parallele Schwenkachse 22 schwenkbar angebracht. Die Sitzhalterung 21 wird durch ein quer zur Haupt-Symmetrie-Ebene des Stuhles, d.h. quer zur Zeichnungsebene der Fig. 2 verlaufendes C-Profil gebildet. Auf dieser vorderen Sitzhalterung 21 ist eine den Kern des Sitzteils 5 bildende in sich starre Sitzplatte 23 über Gummi-Puffer 24 abgestützt und befestigt. Die Sitzplatte 23 ist in ihrem hinte­ren, der Rückenlehne 6 zugewandten Bereich ebenfalls über Gummi-Puffer 25 auf einer hinteren Sitzhalterung 26 abgestützt und befestigt, die durch ein ebenfalls quer zur Haupt-Symmetrie-Ebene des Stuhles, d.h. quer zur Zeichnungsebene der Fig. 2 verlaufendes Winkel-Profil gebildet wird.At the front end of the front seat support part 12 of the seat support 4, a front seat holder 21 is attached so as to be pivotable about a pivot axis 22 parallel to the pivot axis 20. The seat bracket 21 is replaced by a crosswise to the main plane of symmetry of the chair, i.e. 2 C-profile formed transversely to the plane of the drawing. On this front seat bracket 21, a rigid seat plate 23, which forms the core of the seat part 5, is supported and fastened via rubber buffers 24. The seat plate 23 is also supported and fastened in its rear area facing the backrest 6 via rubber buffers 25 on a rear seat holder 26, which is also supported by a plane transverse to the main plane of symmetry of the chair, i. An angle profile extending transversely to the plane of the drawing in FIG. 2 is formed.

Am hinteren Ende des hinteren Sitzträgerteils 13, d.h. etwa in dem Bereich, in dem die Sitzschale 7 nach oben in die Rückenlehne 6 übergeht, ist ein längenverstell­barer Kraftspeicher in Form einer längenverstellbaren Gasfeder 27 um eine Schwenkachse 28 angelenkt, die zu den Schwenkachsen 2o und 22 parallel verläuft. Dieser Schwenkachse 28 ist das Gehäuse 29 der Gasfeder 27 zu­gewandt, aus deren anderem Ende eine Kolbenstange 3o herausgeführt ist. Aus dieser Kolbenstange 3o ragt ein Betätigungsstift 31 heraus, mittels dessen ein in der Gasfeder befindliches Ventil zur Längenverstellung be­tätigt werden kann. Die Kolbenstange 3o ist mittels eines Gewindes mit einer Betätigungseinrichtung 32 verbunden, zu der der Betätigungshebel 9 gehört. Diese Betätigungseinrichtung 32 ist zwischen den Seitenwän­den 14,15 des vorderen Sitzträgerteils 12 parallel zu den Schwenkachsen 2o,22,28 schwenkbar gelagert. Der Betätigungshebel 9 ist durch ein Langloch 33 in der zugeordneten Seitenwand 16 des hinteren Sitzträger­teils 13 herausgeführt, wobei dieses Langloch 33 der­art gekrümmt ist, daß sein Mittelpunkt mit der Schwenkachse 2o zusammenfällt.At the rear end of the rear seat support part 13, that is to say approximately in the area in which the seat shell 7 merges upwards into the backrest 6, a length-adjustable energy store in the form of a length-adjustable gas spring 27 is articulated about a pivot axis 28 which leads to the pivot axes 2o and 22 runs parallel. This The housing 29 of the gas spring 27 faces the pivot axis 28, from the other end of which a piston rod 30 is led out. An actuating pin 31 protrudes from this piston rod 3o, by means of which a valve in the gas spring can be actuated for length adjustment. The piston rod 3o is connected by a thread to an actuating device 32, to which the actuating lever 9 belongs. This actuating device 32 is pivotably mounted between the side walls 14, 15 of the front seat support part 12 parallel to the pivot axes 2o, 22, 28. The actuating lever 9 is led out through an elongated hole 33 in the associated side wall 16 of the rear seat support part 13, this elongated hole 33 being curved in such a way that its center coincides with the pivot axis 20.

Zwischen den Seitenwänden 14,15 des vorderen Sitzträ­gerteils ist ein nach Art eines Kastenprofils ausge­bildeter Lagerbock 34 befestigt, in dem eine nach unten sich erweiternde und nach unten offene Konus­hülse 35 ausgebildet ist. In dieser Konushülse 35 ist die Stuhlsäule 3 lösbar befestigt. Der Betätigungs­hebel 8 ist oberhalb des Lagerbocks 34 angeordnet.Between the side walls 14, 15 of the front seat support part, a bearing block 34 designed in the manner of a box profile is fastened, in which a downwardly widening and downwardly open conical sleeve 35 is formed. The chair column 3 is detachably fastened in this cone sleeve 35. The actuating lever 8 is arranged above the bearing block 34.

Bei Längenverstellungen der Gasfeder 27 werden der vordere und der hintere Sitzträgerteil 12 bzw. 13 um die Schwenkachse 2o relativ zueinander verschwenkt, wobei der vordere Sitzträgerteil 12 wegen der starren - wenn auch lösbaren - Verbindung mit der Stuhlsäule 3 seine Lage nicht ändert, d.h. der hintere Sitzträger­teil 13 wird in seiner Neigung verändert. Hierdurch wird gleichzeitig die Neigung der Sitzplatte 23 in ihrer Neigung verändert.When the gas spring 27 is adjusted in length, the front and rear seat support parts 12 and 13 are pivoted relative to one another about the pivot axis 2o, the front seat support part 12 not changing its position, ie the rear one, because of the rigid — albeit detachable — connection to the chair column 3 Seat support part 13 is changed in its inclination. Through this the inclination of the seat plate 23 is simultaneously changed in its inclination.

Die höhenverstellbare Stuhlsäule 3 ist beispielsweise aus der DE-PS 19 31 o12 (entsprechend US-PS 3 711 o54) bzw. der DE-PS 18 12 282 (entsprechend US-PS 3 656 593) bekannt. Der Aufbau des Sitzträgers ein­schließlich der geschilderten Verschwenkmöglichkeit ist beispielsweise aus der EP-OS o 179 185 (entspre­chend ZA-PS 85/6126) bekannt. Aufbau und Anordnung der Betätigungseinrichtung 32 und der Gasfeder 27 sind aus der EP-OS o 179 216 (entsprechend US-PS 4 662 48o) be­kannt.The height-adjustable chair column 3 is known, for example, from DE-PS 19 31 o12 (corresponding to US Pat. No. 3,711,054) or DE-PS 18 12 282 (corresponding to US Pat. No. 3,656,593). The structure of the seat support including the described pivoting possibility is known for example from EP-OS o 179 185 (corresponding to ZA-PS 85/6126). The structure and arrangement of the actuating device 32 and the gas spring 27 are known from EP-OS o 179 216 (corresponding to US Pat. No. 4,662,488).

An der hinteren Sitzhalterung 26, also insoweit im hinteren Bereich des hinteren Sitzträgerteils 13, ist ein gabelförmiger Bügel 36 angebracht. Er weist einen sich quer zur Haupt-Symmetrie-Ebene des Stuhles er­streckenden Quersteg 37 auf, der an der hinteren Sitz­halterung 13 mittels Schrauben 38 befestigt ist. Von den beiden seitlichen Enden dieses Querstegs 37 er­strecken sich parallel zueinander gebogene Arme 39, die aus der etwa horizontalen Lage des Quersteges 37 nach hinten und oben gebogen sind. An den oberen Enden dieser Arme ist eine in sich starre Rückenlehnenplatte 4o mittels Schrauben 41 befestigt, die den Kern der Rückenlehne 6 bildet. Die Arme 39 weisen - wie insbe­sondere Fig. 3 entnehmbar ist - in ihrem sich an den Quersteg 37 anschließenden Bereich einen schräg nach hinten und oben verlaufenden Abschnitt 42 auf. Die Sitzplatte 23 weist in ihrem unteren Bereich einen ebenfalls schräg nach hinten und oben verlaufenden Abschnitt 43 auf, der im wesentlichen zwischen bzw. seitlich neben den Abschnitten 42 der Arme 39 liegt. In diesem Bereich liegen also die Arme 39 mit ihren Abschnitten 42 etwa in dem hinteren Abschnitt 43 der Sitzplatte 23. Aus dem Abschnitt 42 verläuft jeweils ein oberer Abschnitt 44 nach oben, an dessen oberen Enden die Rückenlehnenplatte 4o befestigt ist. Der Bügel 36 insgesamt und insbesondere die gebogenen Arme 39 sind in sich starr ausgebildet. Die Arme 39 beste­hen hierzu aus ausreichend dickem Flachstahl. Zwischen den beiden Armen sind einige parallel zum Quersteg 37 verlaufende Verbindungsleisten 45 angebracht.A fork-shaped bracket 36 is attached to the rear seat holder 26, that is to say in the rear region of the rear seat support part 13. It has a transverse web 37 which extends transversely to the main symmetry plane of the chair and is fastened to the rear seat holder 13 by means of screws 38. Arms 39, which are bent parallel to one another and extend from the approximately horizontal position of the cross bar 37, extend backwards and upwards from the two lateral ends of this cross bar 37. At the upper ends of these arms, a rigid backrest plate 4o is fastened by means of screws 41, which forms the core of the backrest 6. The arms 39 have - as can be seen in particular in FIG. 3 - in their area adjoining the transverse web 37 a section 42 which runs obliquely backwards and upwards. In its lower region, the seat plate 23 also has an obliquely running backwards and upwards Section 43, which lies essentially between or laterally next to the sections 42 of the arms 39. In this area, the arms 39 with their sections 42 lie approximately in the rear section 43 of the seat plate 23. From the section 42, an upper section 44 extends upwards, at the upper ends of which the backrest plate 4o is fastened. The bracket 36 as a whole and in particular the curved arms 39 are rigid in themselves. For this purpose, the arms 39 consist of sufficiently thick flat steel. Between the two arms are some connecting strips 45 running parallel to the crossbar 37.

Die Sitzschale 7 ist auf ihrer Oberseite durchgehend mit einer beispielsweise aus Schaumstoff bestehenden Polsterauflage 46 versehen, d.h. diese deckt die Rückenlehne 6, die zwischen Rückenlehnenplatte 4o und Sitzplatte 23 befindliche, durch die Arme 39 des Bü­gels 36 begrenzte Öffnung 47 und die Oberseite der Sitzplatte 23 ab. Durch die die Öffnung 47 über­brückenden Verbindungsleisten 45 wird verhindert, daß diese Polsterauflage 46 sich zur Rückseite des Stuhles hin durchdrückt.The seat shell 7 is continuously provided on its top with a cushion pad 46, for example made of foam, i.e. this covers the backrest 6, the opening 47 located between the backrest plate 40 and the seat plate 23 and delimited by the arms 39 of the bracket 36 and the top of the seat plate 23. The connecting bars 45 bridging the opening 47 prevent this cushion pad 46 from being pushed through to the rear of the chair.

Weiterhin sind die Rückseite der Rückenlehnenplatte 4o und die Rückseite der Öffnung 47 mit einer Polsterauf­lage 48 versehen. Die Polsterauflagen 46,48 sind mit einem Polsterbezug 49 überzogen, der also die gesamte Innenseite der Sitzschale 7 und die Rückseite der Rückenlehne 6 bis in den Bereich des Sitzträgers 4 überdeckt.Furthermore, the back of the backrest plate 4o and the back of the opening 47 are provided with a cushion pad 48. The cushion pads 46, 48 are covered with a cushion cover 49, which therefore covers the entire inside of the seat shell 7 and the back of the backrest 6 up to the area of the seat support 4.

Wie sich aus der obigen Beschreibung und der zeichne­rischen Darstellung ergibt, handelt es sich bei dem Sitzträger 4 um eine sogenannte Synchronmechanik, d.h. bei Längenverstellungen der Gasfeder 27 wird einer­seits die Neigung der Sitzplatte 23 und damit des Sitzteils 5 und andererseits die Neigung der Rücken­lehnenplatte 4o und damit der Rückenlehne 6 anderer­seits geändert. Aus Fig. 3 geht hierzu hervor, daß bei einem Zurückschwenken der Rückenlehne 6 deren Neigung stärker verändert wird, als die Neigung des Sitz­teils 5. In Fig. 3 sind zur entsprechenden Veranschau­lichung die Sitzplatte 23 und die Rückenlehnenplatte 4o jeweils in ihrer am weitesten hoch- bzw. nach vorn geschwenkten Stellung ausgezogen dargestellt und in ihrer nach unten bzw. hinten geschwenkten Stellung strichpunktiert gezeichnet. Hierbei zeigt sich auch, daß beim Zurückschwenken der Rückenlehne 6, was durch Druck des Benutzers mit seinem Rücken erfolgt, die Rückenlehne 6 stärker nach unten bewegt wird, als der Sitzteil 5 in ihrem hinteren Bereich. Das Maß a, um das die Sitzplatte 23 in ihrem hinteren Bereich nach unten maximal abgesenkt ist, ist deutlich kleiner als das Maß b, um das die Rückenlehnenplatte 4o bei dieser Verschwenkbewegung nach unten bewegt wird. Dadurch wird der sogenannte Hemden-Auszieheffekt zahlreicher Synchronmechaniken vermieden. Fig. 3 ist auch entnehm­bar, daß die relative Lage des Abschnitts 43 der Sitz­platte 23 zum Abschnitt 42 der Arme 39 sich bei den Neigungsverstellungen nur unwesentlich ändert. Diese Änderung wird von der Polsterauflage 46 optisch aufge­fangen, d.h. sie bleibt nach außen unsichtbar.As can be seen from the above description and the graphical representation, the seat support 4 is a so-called synchronous mechanism, ie when the gas spring 27 is adjusted in length, on the one hand the inclination of the seat plate 23 and thus the seat part 5 and on the other hand the inclination of the backrest plate 4o and so that the backrest 6 on the other hand changed. 3 shows that when the backrest 6 is pivoted back, its inclination is changed more than the inclination of the seat part 5. In FIG. 3, the seat plate 23 and the backrest plate 4o are each in their most high position for illustration purposes. or shown in the forward pivoted position and drawn in dash-dotted lines in their pivoted downward or rearward position. This also shows that when the backrest 6 is pivoted back, which is caused by pressure from the user with his back, the backrest 6 is moved downward more than the seat part 5 in its rear region. The dimension a by which the seat plate 23 is maximally lowered in its rear region is significantly smaller than the dimension b by which the backrest plate 4o is moved downward during this pivoting movement. This avoids the so-called shirt pull-out effect of numerous synchronous mechanisms. Fig. 3 can also be seen that the relative position of section 43 of the seat plate 23 to section 42 of the arms 39 changes only slightly with the inclination adjustments. This change is visually absorbed by the cushion pad 46, ie it remains invisible from the outside.

Die Armlehnen 11 sind in sich biegsam, d.h. bei den geschilderten Schwenkbewegungen der Rückenlehne 6 können sie sich elastisch verformen, und zwar insbe­sondere in dem stark gekrümmten Übergangsabschnitt 5o zwischen dem annähernd vertikalen Stützabschnitt 51 und dem annähernd horizontalen Armauflageabschnitt 52. Sie sind an ihren beiden Enden jeweils mittels Schwenkgelenken 53,54 schwenkbar an der Unterseite der Sitzplatte 23 bzw. an der Rückenlehnenplatte im Be­reich der oberen Ende der Arme 39 befestigt.The armrests 11 are flexible in themselves, i.e. during the described pivoting movements of the backrest 6, they can deform elastically, in particular in the strongly curved transition section 5o between the approximately vertical support section 51 and the approximately horizontal armrest section 52 Underside of the seat plate 23 or attached to the backrest plate in the region of the upper end of the arms 39.

Wenn - wie es beispielsweise aus der EP-OS o 179 216 (entsprechend US-PS 4 662 48o) bekannt ist - die Betä­tigungseinrichtung 32 so blockiert werden kann, daß der Betätigungsstift 31 der Gasfeder 27 ständig in diese hineingeschoben ist, daß deren inneres Ventil also ständig geöffnet ist, dann kann mit dem Stuhl unter ständiger wiederholter Verformung der Sitz­schale 7 gewippt werden.If - as is known, for example, from EP-OS o 179 216 (corresponding to US Pat. No. 4,662,488) - the actuating device 32 can be blocked in such a way that the actuating pin 31 of the gas spring 27 is constantly pushed into it so that its inner valve is constantly open, then can be rocked with the chair under constant repeated deformation of the seat shell 7.

Für das Verhältnis des Abstandes c zwischen der hinte­ren Sitzhalterung 26 und der Schwenkachse 2o und dem Abstand d zwischen der Schwenkachse 2o und der vorde­ren Sitzhalterung 21 gilt 1,5 c≦d≦2 c. Diese Längen­verhältnisse und die Tatsache, daß die Schwenkachse 2o im oberen Bereich der Sitzträgerteile 12,13 angeordnet ist, führen zu dem geschilderten Effekt, wonach b größer klein a ist. Außerdem wirkt hierbei noch die Schwenkbarkeit der vorderen Sitzhalterung 21 um die Schwenkachse 22 mit.For the ratio of the distance c between the rear seat bracket 26 and the pivot axis 2o and the distance d between the pivot axis 2o and the front seat bracket 21, 1.5 c ≦ d ≦ 2 c applies. These length ratios and the fact that the pivot axis 2o is arranged in the upper region of the seat support parts 12, 13 lead to the effect described, according to which b is greater than small a. In addition, the pivotability of the front seat holder 21 about the pivot axis 22 also plays a role.

Claims (5)

1. Stuhl, insbesondere Bürostuhl, mit einem Fußgestell (1) und einem darauf mit einem vorderen Sitzträgerteil (12) befestigten Sitzträger (4), dessen hinterer Sitz­trägerteil (13) mittels einer Schwenkachse (2o) am vorderen Sitzträgerteil (12) angelenkt ist, wobei zwi­schen dem vorderen und dem hinteren Sitzträgerteil (12,13) ein Kraftspeicher (Gasfeder 27) angelenkt ist, wobei auf dem vorderen und dem hinteren Sitzträgerteil (12,13) eine Sitzplatte (23) eines Sitzteils (5) abge­stützt ist, wobei am hinteren Sitzträgerteil (13) mit­tels eines starren Rückenlehnenträgers eine Rückenleh­nenplatte (4o) einer Rückenlehne (6) angebracht ist, und wobei die Rückenlehnenplatte (4o) und die Sitz­platte (23) mit einer Polsterauflage (46) versehen sind, dadurch gekennzeichnet, daß der Rückenlehnenträ­ger durch einen Bügel (36) mit zwei parallel zueinan­der verlaufenden nach oben ragenden Armen (39) ausge­bildet ist, an denen die Rückenlehnenplatte (4o) ange­bracht ist, und daß die Rückenlehne (6) und der Sitz­teil (5) und eine zwischen der Rückenlehnenplatte (4o) und der Sitzplatte (23) befindliche, seitlich im we­sentlichen durch die Arme (39) begrenzte Öffnung (47) durch eine durchgehende Polsterauflage (46) und einen durchgehenden Polsterbezug (49) abgedeckt sind.1. chair, in particular office chair, with a base frame (1) and a seat support (4) fastened thereon with a front seat support part (12), the rear seat support part (13) of which is articulated on the front seat support part (12) by means of a pivot axis (2o), wherein a force accumulator (gas spring 27) is articulated between the front and rear seat support part (12, 13), a seat plate (23) of a seat part (5) being supported on the front and rear seat support part (12, 13), wherein on rear seat support part (13) by means of a rigid backrest support a backrest plate (4o) of a backrest (6) is attached, and wherein the backrest plate (4o) and the seat plate (23) are provided with a cushion pad (46), characterized in that the backrest support is formed by a bracket (36) with two mutually parallel upwardly projecting arms (39) on which the backrest plate (4o) is attached, and that the backrest (6) and the S Itzteil (5) and an between the backrest plate (4o) and the seat plate (23), laterally essentially by the arms (39) limited opening (47) are covered by a continuous cushion pad (46) and a continuous cushion cover (49) . 2. Stuhl nach Anspruch 1, dadurch gekennzeichnet, daß die Sitzplatte (23) einen hinteren Abschnitt (43) auf­weist, der im wesentlichen fluchtend zu unteren Ab­schnitten (42) der Arme (39) im Bereich des hinteren Sitzträgerteils (13) verläuft.2. Chair according to claim 1, characterized in that the seat plate (23) has a rear section (43) which is substantially flush with lower sections (42) of the arms (39) in the region of the rear seat support part (13). 3. Stuhl nach Anspruch 2, dadurch gekennzeichnet, daß die Abschnitte (43; 42) im wesentlichen nach hinten und oben verlaufend ausgebildet sind.3. Chair according to claim 2, characterized in that the sections (43; 42) are designed to extend essentially to the rear and up. 4. Stuhl nach Anspruch 1, dadurch gekennzeichnet, daß zwischen den Armen (39) Verbindungsleisten (45) ange­ordnet sind.4. Chair according to claim 1, characterized in that between the arms (39) connecting strips (45) are arranged. 5. Stuhl nach Anspruch 1, dadurch gekennzeichnet, daß am Sitzteil (5) einerseits und an der Rückenlehne (6) andererseits elastisch verformbare Armlehnen (11) an­gebracht sind.5. Chair according to claim 1, characterized in that on the seat part (5) on the one hand and on the backrest (6) on the other hand elastically deformable armrests (11) are attached.
EP89106441A 1988-06-22 1989-04-11 Chair, in particular an office chair Expired - Lifetime EP0347538B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89106441T ATE69704T1 (en) 1988-06-22 1989-04-11 CHAIR, ESPECIALLY OFFICE CHAIR.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE8808022U DE8808022U1 (en) 1988-06-22 1988-06-22 Chair, especially office chair
DE3821042 1988-06-22
DE3821042A DE3821042A1 (en) 1988-06-22 1988-06-22 CHAIR, ESPECIALLY OFFICE CHAIR

Publications (2)

Publication Number Publication Date
EP0347538A1 true EP0347538A1 (en) 1989-12-27
EP0347538B1 EP0347538B1 (en) 1991-11-27

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Family Applications (1)

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EP89106441A Expired - Lifetime EP0347538B1 (en) 1988-06-22 1989-04-11 Chair, in particular an office chair

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EP (1) EP0347538B1 (en)
DE (2) DE8808022U1 (en)
ES (1) ES2028406T3 (en)
GR (1) GR3003216T3 (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
EP0501168A1 (en) * 1991-02-27 1992-09-02 Friedrich W. Dauphin GmbH &amp; Co Entwicklungs- und Beteiligungs-KG Chair, in particular an office chair
WO2014059553A1 (en) * 2012-10-18 2014-04-24 Vitra Patente Ag Seat with relative synchronous displacement between back incline and seat incline

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9211244U1 (en) * 1992-08-21 1992-10-29 Friedrich W. Dauphin GmbH & Co, Entwicklungs- und Beteiligungs-KG, 8561 Offenhausen Chair
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
US10194750B2 (en) 2015-04-13 2019-02-05 Steelcase Inc. Seating arrangement
EP3282899B1 (en) 2015-04-13 2021-11-03 Steelcase Inc. Seating arrangement
AU2020224628A1 (en) 2019-02-21 2021-08-26 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof

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Publication number Priority date Publication date Assignee Title
EP0179185A2 (en) * 1984-10-24 1986-04-30 Bürositzmöbelfabrik Friedrich-W. Dauphin GmbH &amp; Co. Chair, in particular an office chair
DE8515221U1 (en) * 1985-05-23 1986-05-22 VOKO - Franz Vogt & Co, 6301 Pohlheim Seating
EP0242140B1 (en) * 1986-04-10 1991-09-11 Steelcase Inc. Integrated chair and control

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AU541109B2 (en) * 1981-08-19 1984-12-13 Giroflex Entwicklungs Ag Chair
DE3618705C2 (en) * 1986-06-04 2002-04-11 Hartmut S Engel Function seating
CH672237A5 (en) * 1986-10-14 1989-11-15 Giroflex Entwicklungs Ag Relaxing chair

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Publication number Priority date Publication date Assignee Title
EP0179185A2 (en) * 1984-10-24 1986-04-30 Bürositzmöbelfabrik Friedrich-W. Dauphin GmbH &amp; Co. Chair, in particular an office chair
DE8515221U1 (en) * 1985-05-23 1986-05-22 VOKO - Franz Vogt & Co, 6301 Pohlheim Seating
EP0242140B1 (en) * 1986-04-10 1991-09-11 Steelcase Inc. Integrated chair and control

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0501168A1 (en) * 1991-02-27 1992-09-02 Friedrich W. Dauphin GmbH &amp; Co Entwicklungs- und Beteiligungs-KG Chair, in particular an office chair
WO2014059553A1 (en) * 2012-10-18 2014-04-24 Vitra Patente Ag Seat with relative synchronous displacement between back incline and seat incline
US10028586B2 (en) 2012-10-18 2018-07-24 Vitra Patente Ag Seat with relative synchronous displacement between back incline and seat incline

Also Published As

Publication number Publication date
ES2028406T3 (en) 1992-07-01
GR3003216T3 (en) 1993-02-17
DE8808022U1 (en) 1988-08-11
EP0347538B1 (en) 1991-11-27
DE3821042A1 (en) 1989-12-28

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