EP0613642A1 - Chair, especially office chair - Google Patents

Chair, especially office chair Download PDF

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Publication number
EP0613642A1
EP0613642A1 EP94100085A EP94100085A EP0613642A1 EP 0613642 A1 EP0613642 A1 EP 0613642A1 EP 94100085 A EP94100085 A EP 94100085A EP 94100085 A EP94100085 A EP 94100085A EP 0613642 A1 EP0613642 A1 EP 0613642A1
Authority
EP
European Patent Office
Prior art keywords
seat
support
spring
backrest
horizontal axis
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.)
Withdrawn
Application number
EP94100085A
Other languages
German (de)
French (fr)
Inventor
Wilhelm Schulz
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.)
Drabert Soehne GmbH and Co
Original Assignee
Drabert Soehne GmbH and Co
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 Drabert Soehne GmbH and Co filed Critical Drabert Soehne GmbH and Co
Publication of EP0613642A1 publication Critical patent/EP0613642A1/en
Withdrawn legal-status Critical Current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
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03277—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

Definitions

  • the invention relates to seating furniture, in particular an office chair according to the preamble of claim 1.
  • a disadvantage of the known seating furniture of this type is the fact that it is comparatively complex.
  • the invention is based on the object of making seating furniture of the type presupposed as known particularly easy to manufacture from a few parts and at low cost.
  • the design of the coupling element as a spiral spring has the result that this spiral spring has a spring function and a lever function at the same time, that is to say it can perform mechanical forced coupling between the backrest support and the seat.
  • the double function of the spiral spring makes such seating furniture lighter, simpler and less expensive than the known seating furniture of the type presumed to be known.
  • a seat support 2 is fastened on the central chair column 1 and has a front area consisting of two parallel webs 2a, on which the seat 3 is mounted so as to be pivotable about a pivot axis 3a.
  • a backrest support 4 is pivotally mounted about a pivot axis 4a.
  • the backrest support 4 carries a backrest 5.
  • a connection is made by means of a spiral spring 6 between the seat 3 and the backrest support 4.
  • the backrest support 4 consists of two parallel areas, which have at their ends receptacles for the ends of the arms 6b of the spiral spring.
  • the arms 6b are pivotally attached to the two parallel legs of the backrest support 4 about the axes 4b.
  • the arms 6b of the spiral spring 6 extend obliquely outwards and upwards to an offset along the axis 3b.
  • the axis 3b is formed by corresponding recordings of the horizontal area of the spiral spring 6.
  • These receptacles or storage areas 3 c are attached to the underside of the seat 3.
  • this cranked area 6a is supported at the rear end of the seat support 2 behind the chair column 1 by resting there. It is easily possible to adjust the spring hardness by an additional adjusting screw, not shown, which can be adjusted is supported on the one hand on the cranked area 6a and on the other hand on the seat support 2.
  • the movement of the backrest support is transmitted to the seat 3 via the arms 6b.
  • the spiral spring 6 is thus simultaneously a coupling element for the movement and a spring element.
  • spiral spring is used as a generic term for various types of springs, all of which can be used in the invention.
  • the spiral spring can be a torsion spring, for example.
  • leg spring it is possible to design the spiral spring as a leg spring, the windings being able to extend around the axis 3b.
  • simple leaf springs as spiral springs, which are clamped rigidly at the articulation points 4b and 3b, for example.

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

Abstract

A chair, especially office chair, has an underframe with a seat support (2), on which a seat (3) is mounted so as to be able to pivot about a front, horizontal axis (3a) counter to the force of a restoring spring (6). A back support (4) is fixed so as to be pivotable about a horizontal axis (4a) on the seat support (2) counter to the force of a restoring spring (6). In this arrangement, the pivoting movement of back support (4) and back (5) is necessarily coupled to the pivoting movement of the seat (3). The coupling element is formed by a bending spring (6) which connects the back support (4) to the seat (3). This bending spring (6) is mounted, on one side, on the back support (4) so as to be pivotable about a horizontal axis (4b) and is mounted, on the other side, on the seat (3) so as to be pivotable about an at least approximately horizontal axis (3b). The chair is easily and simply constructed and thus inexpensive to produce. The restoring force of the back into the starting position is dependent on the weight of the user. <IMAGE>

Description

Die Erfindung betrifft ein Sitzmöbel, insbesondere einen Bürostuhl nach dem Oberbegriff des Anspruchs 1.The invention relates to seating furniture, in particular an office chair according to the preamble of claim 1.

Bei bekannten Sitzmöbeln dieser Art erfolgt die Kopplung zwischen Rückenlehnenneigung und Sitzneigung über Gestänge oder Hebel, die ausschließlich zur Kopplungsfunktion dienen. Darüber hinaus sind zusätzlich Federelemente vorgesehen, die die erforderlichen Rückstellkräfte zum automatischen Rückstellen in die Ausgangslage erzeugen.In known seating of this type, the coupling between backrest inclination and seat inclination takes place via linkages or levers which serve exclusively for the coupling function. In addition, spring elements are also provided, which generate the necessary restoring forces for the automatic return to the starting position.

Nachteilig bei den bekannten derartigen Sitzmöbeln ist die Tatsache, daß sie vergleichsweise aufwendig gebaut sind.A disadvantage of the known seating furniture of this type is the fact that it is comparatively complex.

Der Erfindung liegt demgegenüber die Aufgabe zugrunde, ein Sitzmöbel der als bekannt vorausgesetzten Art besonders einfach, aus wenigen Teilen und preisgünstig herstellbar zu machen.In contrast, the invention is based on the object of making seating furniture of the type presupposed as known particularly easy to manufacture from a few parts and at low cost.

Die Lösung dieser Aufgabe erfolgt mit den Merkmalen des Kennzeichnungsteils von Anspruch 1.This object is achieved with the features of the labeling part of claim 1.

Die Ausbildung des Kopplungselements als Biegefeder hat zur Folge, daß diese Biegefeder gleichzeitig Federfunktion und Hebelfunktion besitzt, also mechanische Zwangskopplung zwischen Rückenlehnenträger und Sitz vornehmen kann. Die Doppelfunktion der Biegefeder macht ein derartiges Sitzmöbel leichter, einfacher und preisgünstiger als die bekannten Sitzmöbel der als bekannt vorausgesetzten Art.The design of the coupling element as a spiral spring has the result that this spiral spring has a spring function and a lever function at the same time, that is to say it can perform mechanical forced coupling between the backrest support and the seat. The double function of the spiral spring makes such seating furniture lighter, simpler and less expensive than the known seating furniture of the type presumed to be known.

Bevorzugte Ausführungsformen der Erfindung sind in den Unteransprüchen beschrieben.Preferred embodiments of the invention are described in the subclaims.

Nachstehend wird eine bevorzugte Ausführungsform der Erfindung anhand der Zeichnung im einzelnen beschrieben. Es zeigen:

Figur 1 -
eine schematische Seitenansicht eines Bürostuhls in einer ersten Neigungsstellung,
Figur 2 -
die Seitenansicht gemäß Figur 1 in einer anderen Neigungsposition,
Figur 3 -
eine Vorderansicht des Bürostuhls gemäß Figuren 1 und 2, wobei der Sitz gegenüber Figuren 1 und 2 vereinfacht dargestellt ist,
Figur 4 -
eine Draufsicht auf die Sitzmechanik von oben bei abgenommenem, strichpunktiert angedeutetem Sitz.
A preferred embodiment of the invention is described in detail below with reference to the drawing. Show it:
Figure 1 -
1 shows a schematic side view of an office chair in a first inclination position,
Figure 2 -
the side view of Figure 1 in a different inclination position,
Figure 3 -
2 shows a front view of the office chair according to FIGS. 1 and 2, the seat being shown in simplified form compared to FIGS. 1 and 2,
Figure 4 -
a plan view of the seat mechanism from above with removed, dash-dotted indicated seat.

Vom Untergestell des Bürostuhls ist lediglich die zentrale Stuhlsäule 1 dargestellt. Auf der zentralen Stuhlsäule 1 ist ein Sitzträger 2 befestigt, der einen aus zwei parallelen Stegen 2a bestehenden vorderen Bereich aufweist, an dem um eine Schwenkachse 3a verschwenkbar der Sitz 3 gelagert ist. An dem Sitzträger 2 ist ein Rückenlehnenträger 4 schwenkbar um eine Schwenkachse 4a gelagert. Der Rückenlehnenträger 4 trägt eine Rückenlehne 5.From the base of the office chair is only the central one Chair column 1 shown. A seat support 2 is fastened on the central chair column 1 and has a front area consisting of two parallel webs 2a, on which the seat 3 is mounted so as to be pivotable about a pivot axis 3a. On the seat support 2, a backrest support 4 is pivotally mounted about a pivot axis 4a. The backrest support 4 carries a backrest 5.

Zwischen dem Sitz 3 und dem Rückenlehnenträger 4 wird eine Verbindung mittels einer Biegefeder 6 hergestellt.A connection is made by means of a spiral spring 6 between the seat 3 and the backrest support 4.

Der Rückenlehnenträger 4 besteht aus zwei parallelen Bereichen, die die an ihren Enden Aufnahmen für die Enden der Arme 6b der Biegefeder besitzen. Die Arme 6b sind um die Achsen 4b verschwenkbar an den beiden parallelen Schenkeln des Rückenlehnenträgers 4 befestigt. Die Arme 6b der Biegefeder6 erstrecken sich schräg auswärts und aufwärts bis zu einer Abkröpfung entlang der Achse 3b. Die Achse 3b wird durch entsprechende Aufnahmen des horizontalen Bereichs der Biegefeder 6 gebildet. Diese Aufnahmen oder Lagerbereiche 3c sind an der Unterseite des Sitzes 3 befestigt.The backrest support 4 consists of two parallel areas, which have at their ends receptacles for the ends of the arms 6b of the spiral spring. The arms 6b are pivotally attached to the two parallel legs of the backrest support 4 about the axes 4b. The arms 6b of the spiral spring 6 extend obliquely outwards and upwards to an offset along the axis 3b. The axis 3b is formed by corresponding recordings of the horizontal area of the spiral spring 6. These receptacles or storage areas 3 c are attached to the underside of the seat 3.

Zwischen den beiden inneren Lagerbereichen 3c befindet sich ein abgekröpfter Bereich 6a der Biegefeder 6. Dieser abgekröpfte Bereich stützt sich im dargestellten Ausführungsbeispiel am hinteren Ende des Sitzträgers 2 hinter der Stuhlsäule 1 ab, indem er dort anliegt. Es ist ohne weiteres möglich, die Federhärte durch eine zusätzliche, nicht dargestellte Verstellschraube einzustellen, die sich einerseits am abgekröpften Bereich 6a und andererseits am Sitzträger 2 abstützt.Between the two inner bearing areas 3c there is a cranked area 6a of the spiral spring 6. In the exemplary embodiment shown, this cranked area is supported at the rear end of the seat support 2 behind the chair column 1 by resting there. It is easily possible to adjust the spring hardness by an additional adjusting screw, not shown, which can be adjusted is supported on the one hand on the cranked area 6a and on the other hand on the seat support 2.

Die Bewegung des Rückenlehnenträgers wird über die Arme 6b auf den Sitz 3 übertragen. Die Biegefeder 6 ist also gleichzeitig ein Kopplungselement für die Bewegung und ein Federelement.The movement of the backrest support is transmitted to the seat 3 via the arms 6b. The spiral spring 6 is thus simultaneously a coupling element for the movement and a spring element.

Der Ausdruck "Biegefeder" wird als Oberbegriff für verschiedene Federarten verwendet, die sämtlich bei der Erfindung verwendbar sind. Die Biegefeder kann beispielsweise eine Torsionsfeder sein. Ferner ist es möglich, die Biegefeder als Schenkelfeder auszubilden, wobei sich die Wicklungen um die Achse 3b erstrecken können. Es ist ferner auch möglich, einfache Blattfedern als Biegefedern vorzusehen, die beispielsweise starr an den Gelenkpunkten 4b und 3b eingespannt werden.The term "spiral spring" is used as a generic term for various types of springs, all of which can be used in the invention. The spiral spring can be a torsion spring, for example. Furthermore, it is possible to design the spiral spring as a leg spring, the windings being able to extend around the axis 3b. It is also possible to provide simple leaf springs as spiral springs, which are clamped rigidly at the articulation points 4b and 3b, for example.

Claims (6)

Sitzmöbel, insbesondere Bürostuhl, mit einem Untergestell, an dem ein Sitzträger vorgesehen ist, an dem ein Sitz um eine vordere waagerechte Achse gegen die Kraft einer Rückstellfeder verschwenkbar gelagert ist, mit einem Rückenlehnenträger, der um eine waagerechte Achse gegen die Kraft einer Rückstellfeder schwenkbar um eine waagerechte Achse am Sitzträger befestigt ist, wobei die Schwenkbewegung von Rückenlehnenträger und Rückenlehne zwangsweise mit der Schwenkbewegung des Sitzes gekoppelt ist,
dadurch gekennzeichnet,
daß das Kopplungselement durch eine Biegefeder (6) gebildet ist, die den Rückenlehnenträger (4) mit dem Sitz (3) verbindet, wobei die Biegefeder einerseits schwenkbar um eine waagerechte Achse (4b) am Rückenlehnenträger (4) und andererseits um eine zumindest annähernd waagerechte Achse (3b) an dem Sitz (3) gelagert ist.Seating furniture, in particular an office chair, with a base frame on which a seat support is provided, on which a seat is pivotably mounted about a front horizontal axis against the force of a return spring, with a backrest support which can be pivoted about a horizontal axis against the force of a return spring a horizontal axis is attached to the seat support, the pivoting movement of the backrest carrier and backrest being forcibly coupled to the pivoting movement of the seat,
characterized,
that the coupling element is formed by a spiral spring (6) which connects the backrest support (4) to the seat (3), the flexible spring being pivotable on the one hand about a horizontal axis (4b) on the backrest support (4) and on the other hand about an at least approximately horizontal Axis (3b) is mounted on the seat (3). Sitzmöbel nach Anspruch 1,
dadurch gekennzeichnet,
daß die Biegefeder (6) eine Torsionsfeder ist.Seating furniture according to claim 1,
characterized,
that the spiral spring (6) is a torsion spring. Sitzmöbel nach Anspruch 1 und 2,
dadurch gekennzeichnet,
daß sich die Torsionsfeder (6) mittels eines abgekröpften mittleren Bereichs (6a) an dem Sitz (3) oder Sitzträger (2) abstützt und über symmetrisch zur Längsmittelachse ausgebildete seitliche Schenkel (6b) mit dem Rückenlehnenträger (4) verbunden ist.Seating furniture according to claim 1 and 2,
characterized,
that the torsion spring (6) is supported on the seat (3) or seat support (2) by means of a cranked central region (6a) and is connected to the backrest support (4) via lateral legs (6b) formed symmetrically to the longitudinal central axis. Sitzmöbel nach einem oder mehreren der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß die Verbindungslinie zwischen den Anlenkpunkten (3b und 4b) der Biegefeder (6) eng benachbart zu der Schwenkachse (4a) des Rückenlehnenträgers (4) am Sitzträger (2) verläuft.Seating furniture according to one or more of claims 1 to 3,
characterized,
that the connecting line between the articulation points (3b and 4b) of the spiral spring (6) runs closely adjacent to the pivot axis (4a) of the backrest support (4) on the seat support (2). Sitzmöbel nach einem oder mehreren der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß die Federhärte der Biegefeder (6) einstellbar ist.Seating furniture according to one or more of claims 1 to 4,
characterized,
that the spring hardness of the spiral spring (6) is adjustable. Sitzmöbel nach einem oder mehreren der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß die Anlenkung bzw. Schwenkachse (3b) der Biegefeder (6) am Sitz (3) oberhalb und hinter der Schwenkachse (4a) des Rückenlehnenträgers (4) liegt, während die Schwenkachse (4b) der Biegefeder (6) am Rückenlehnenträger (4) vor und unterhalb der Schwenkachse (4a) liegt.Seating furniture according to one or more of claims 1 to 5,
characterized,
that the articulation or pivot axis (3b) of the spiral spring (6) on the seat (3) lies above and behind the pivot axis (4a) of the backrest support (4), while the pivot axis (4b) of the spiral spring (6) on the backrest carrier (4) lies in front of and below the swivel axis (4a).
EP94100085A 1993-03-05 1994-01-05 Chair, especially office chair Withdrawn EP0613642A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4306970 1993-03-05
DE4306970A DE4306970C2 (en) 1993-03-05 1993-03-05 Seating furniture, in particular office chair

Publications (1)

Publication Number Publication Date
EP0613642A1 true EP0613642A1 (en) 1994-09-07

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EP94100085A Withdrawn EP0613642A1 (en) 1993-03-05 1994-01-05 Chair, especially office chair

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DE (1) DE4306970C2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001091613A1 (en) * 2000-05-27 2001-12-06 Röder, Peter Chair
WO2011104735A1 (en) * 2010-02-26 2011-09-01 Donati S.P.A. Device for synchronizing the seat and backrest of a chair
US10098466B2 (en) 2013-12-17 2018-10-16 Donati S.P.A. Chair with adjustable backrest

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10049480C2 (en) * 2000-10-06 2002-12-05 Dauphin Friedrich W Gmbh Chair, especially office chair
DE102013022122A1 (en) * 2013-12-28 2015-07-02 Klöber GmbH Work chair with synchronous mechanism and spiral spring

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1109551A (en) * 1965-07-23 1968-04-10 Dare Inglis Products Ltd Tilting chair mechanism
DE3741472A1 (en) * 1987-12-08 1989-06-22 Simon Desanta CHAIR

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1109551A (en) * 1965-07-23 1968-04-10 Dare Inglis Products Ltd Tilting chair mechanism
DE3741472A1 (en) * 1987-12-08 1989-06-22 Simon Desanta CHAIR

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001091613A1 (en) * 2000-05-27 2001-12-06 Röder, Peter Chair
WO2011104735A1 (en) * 2010-02-26 2011-09-01 Donati S.P.A. Device for synchronizing the seat and backrest of a chair
CN102781281A (en) * 2010-02-26 2012-11-14 多纳蒂股份公司 Device for synchronizing the seat and backrest of a chair
US9161627B2 (en) 2010-02-26 2015-10-20 Donati S.P.A. Device for synchronizing the seat and backrest of a chair
US10098466B2 (en) 2013-12-17 2018-10-16 Donati S.P.A. Chair with adjustable backrest

Also Published As

Publication number Publication date
DE4306970A1 (en) 1994-09-08
DE4306970C2 (en) 1995-05-04

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