EP0343450B1 - Stuhl, insbesondere Arbeits- oder Bürostuhl - Google Patents

Stuhl, insbesondere Arbeits- oder Bürostuhl Download PDF

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Publication number
EP0343450B1
EP0343450B1 EP89108563A EP89108563A EP0343450B1 EP 0343450 B1 EP0343450 B1 EP 0343450B1 EP 89108563 A EP89108563 A EP 89108563A EP 89108563 A EP89108563 A EP 89108563A EP 0343450 B1 EP0343450 B1 EP 0343450B1
Authority
EP
European Patent Office
Prior art keywords
seat
backrest
chair
pivot
levers
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
EP89108563A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0343450A1 (de
Inventor
Günter Kratz
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
R O E D E R 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 R O E D E R GmbH filed Critical R O E D E R GmbH
Priority to AT89108563T priority Critical patent/ATE75114T1/de
Publication of EP0343450A1 publication Critical patent/EP0343450A1/de
Application granted granted Critical
Publication of EP0343450B1 publication Critical patent/EP0343450B1/de
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
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/025—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame
    • A47C3/026—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame with central column, e.g. rocking office chairs; Tilting 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
    • A47C1/03255—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

Definitions

  • the invention relates to a chair, in particular a work or office chair, with a seat which can be pivoted in the front region about a horizontal pivot axis and whose inclination can be changed and, depending on the change in inclination of the seat, by means of an adjusting device, the inclination of the backrest which can be changed disproportionately, in which with increasing inclination of the seat, the backrest executes an additional relative movement downwards relative to the facing end of the seat, in which pivot levers are articulated on the support arms of the chair frame directed towards the front, the free ends of which are attached to the backrest in a fixed and non-rotatable manner and carry them, in which the seat is rotatably mounted on these swivel levers and is articulatedly supported on the chair frame in the front region via at least one entraining lever and in which the swivel levers designed as armrests or armrests are arranged on both sides of the seat.
  • Such a chair is known from DE-U-86 16 836.
  • the known chairs of this type offer excellent seating comfort, since on the one hand they provide a clear support for the back of the user in the starting or working position thanks to the practically vertical position of the backrest, but on the other hand they allow relaxed sitting after the backrest is tilted back.
  • the backrest When the backrest is tilted backwards, the user's upper body does not simply make one Swiveling movement, but there is a movement superimposed from different movement components. Since the backrest executes an additional downward movement towards the seat when tilting backwards, a relative movement between the back of the user and the backrest is avoided or at least reduced to an undetectable value.
  • the swivel levers are rotatably mounted in the rear area of the seat and the swivel levers are rotatably mounted on the central column of the chair frame, the swivel levers are for the most part below the seat and cannot be designed directly as an armrest or armrest.
  • the driving lever in the arrangement shown does not cause the front edge of the seat to sink when the backrest support is tilted backwards.
  • multi-link lever chains are used, as shown in EP 0 176 816 A1, or, on the other hand, pairs of transmission levers and drive arches as shown in EP 0 085 870 A1.
  • many parts are required for the adjustment device.
  • the same also applies to a chair according to DE 29 16 897 A1, in which, when the seat is pulled out, the backrest on the backrest bar is displaced in the direction of the seat.
  • pivot levers between the articulation axis on the support arms and the fixed connection point on the backrest carry downwardly projecting bearing tabs on which the seat is rotatably supported with its central region.
  • the swivel levers Due to this articulation of the swivel levers with the mounting brackets, the swivel levers will for the most part lie above the seat and can even take over the function of armrests or armrests.
  • the guide lever also lowers the front edge of the seat, which improves seating comfort when the backrest support is tilted back and the seat angle is increased.
  • the swivel levers and the entraining lever (s) only require robust swivel joints that work reliably.
  • a further embodiment provides that the swivel levers in Area of the articulation axis are angled downwards and run approximately parallel to the bearing brackets for the seat.
  • one embodiment provides that the axis of rotation of the entraining lever or arms on the support arms is arranged facing the front end of the seat in front of the articulation axis of the swivel lever.
  • the lower end of the backrest is connected to the rear region of the seat via a length compensation member.
  • the backrest and seat then form a single unit.
  • the shapely transition from the seat to the backrest is further improved in that the seat has an upward extension at the rear end, the is preferably positively connected to the lower end of the backrest via the length compensation member.
  • the length compensation member is formed from two telescopic parts, then the two parts are connected to the seat and the backrest and covered by means of a bellows.
  • the length compensation element does not have to perform a load-bearing function, it only covers the changing distance between the rear area of the seat and the lower end of the backrest.
  • the elastically designed length compensation member can also itself be designed as a bellows.
  • the pivot bearing of the seat on the pivot levers is solved according to the invention so that the pivot levers between the articulation axis on the support arms and the fixed connection point on the backrest carry downwardly projecting bearing tabs on which the seat is rotatably mounted.
  • the seat can also have mounting brackets for the mounting bolts or even carry the mounting bolts.
  • the seat When lowering the seat, the seat is moved in the direction of the backrest if the design is such that the pivot axis of the pivot lever is arranged below the horizontal pivot axis of the front region of the seat, and that the axis of rotation of the entraining lever or arms on the support arms is the front End of the seat facing the pivot axis of the pivot lever is arranged.
  • Fig. 1 shows schematically how the seat 20 and the backrest 25 are connected to the adjusting device and which parts the adjusting device comprises.
  • the column 10 of the chair frame merges into support arms 11 directed towards the front of the chair.
  • pivot levers 13 are articulated on both sides of the seat, as the articulation axis 12 shows.
  • the seat 20 is rotatably supported with a central area on bearing tabs 14 of the pivot lever 13.
  • the seat 20 can have bearing brackets 23 which receive the bearing bolts for the axis of rotation 15.
  • the free ends of the pivot levers 13 are connected to the backrest 25 as a fixed, non-rotatable connection point 16.
  • the front area of the seat 20 carries bearing brackets 22 for the horizontal pivot axis 19.
  • the carrying levers 17 are preferably also pivotably mounted on the bearing brackets 22 on both sides of the seat 20, and are supported in an articulated manner on the support arms 11 via the axes of rotation 18.
  • the axes of rotation 18 of the entraining lever 17 face the front end of the seat 20 and the pivot axis 13 of the pivot lever 13.
  • the rear end of the seat 20 goes into the upward extension 21, which is connected to the lower end of the backrest 25 via the length compensation member 24.
  • This length compensation member 24 has no load-bearing function, it merely covers the changing distance between the extension 21 of the seat 20 and the lower end of the backrest 25 in an elegant manner.
  • the pivot levers 13 are also adjusted in the direction 27.
  • the swivel angle of the swivel levers 13 is increased due to the distance between the axes of rotation 15 and the articulation axes 12.
  • the entraining levers 17 perform a swiveling movement in the same direction, so that the seat 20, in addition to a lowering in the front region, also a displacement in the direction of the backrest 25 experiences.
  • the backrest 25 executes the inclination movement 28, which is greater than the inclination movement of the seat 20. Since the connection point 16 is rigid, the backrest 25 is forcibly adjusted in the direction 29.
  • the length compensation member 24 allows this movement.
  • the length compensation member 24 takes on the adaptation of the changing distance between the lower end of the backrest 25 and the extension 21 of the seat 20th
  • Fig. 2 shows an embodiment of a chair on an enlarged scale.
  • a swivel lever 13 and an entraining lever 17 are arranged on both sides of the seat 20.
  • Two support arms 11 extend from the column of the chair frame, not shown, which extend to the front region of the seat 20.
  • the seat 20 can consist of a seat support and seat cushion be composed.
  • the pivot levers 13 initially go upward from the articulation axis 12 with an angled section and then extend inclinedly into the lower region of the backrest 25, which can also be composed of a backrest support and a backrest cushion.
  • the ends of the pivot levers 13 are fixed and non-rotatably connected to the backrest 25, as the connection point 16 shows.
  • downward-facing bearing brackets 14 are attached in the front area and run approximately parallel to the angled end sections of the swivel levers 13.
  • About the middle region of the seat 20 is rotatably mounted on the bearing brackets 14, as the axis of rotation 15 shows.
  • further mounting brackets are attached, on which the entraining levers 17 are mounted so as to be pivotable about the horizontal pivot axis 19.
  • the driving levers 17 are articulated on the support arms 11 via the axes of rotation 18. In the starting position, the pivot axis 19 of the driving lever 17 and thus the horizontal pivot axis of the seat 20 lie above the pivot axis 12 of the pivot lever 13.
  • the axes of rotation 18 of the pivot lever 17 face the front end of the seat 20 in front of the pivot axis 12 of the pivot lever 13. With the distance of the axes of rotation 15 from the articulation axes 12 is the measure of the increase in the angle of inclination of the backrest 25 when the seat 20 is lowered.
  • the swivel levers 13 are also adjusted in the same swivel direction via the mounting brackets 14, the swivel angle of the swivel lever 13 being correspondingly greater than the swivel angle of the seat 20.
  • the driving levers 17 are also pivoted in the direction of the backrest 25.
  • the backrest 25 can be adjusted up to a 25 'marked end position, the seat 20 assuming the end position shown in broken lines in FIG. 3. The lowering of the front area of the seat 20 can be clearly seen.
  • the pivot levers 13 are designed as armrests or armrests and can carry upholstery.
  • the shape above the seat 20 can be designed freely if the rotary bearing of the seat 20 and the fixed attachment of the backrest 25 to the pivot levers 13 and the pivot bearing of the pivot lever 13 on the support arms 11 of the chair frame are maintained.
  • the dimensioning of the driving lever 17 and its articulation on the seat 20 and the support arms 11 depends on the amount of the desired lowering of the front region of the seat 20 and the amount of the desired displacement of the seat 20 in the direction of the backrest 25.
  • the arrangement of the adjusting device comprising the pivoting lever 13 and the carrying lever 17 is identical on both sides of the seat 20.
  • the backrest 25 When the seat 20 is lowered, the backrest 25 is simultaneously also adjusted downwards via the pivoting lever 13, the distance between the lower end of the backrest 25 and the rear end of the seat 20 becoming smaller.
  • This change in distance compensates for the length compensation member 24, which can be constructed in various ways.
  • Two telescopic parts, which on the backrest 25 and the Seat 20 attached and covered by a bellows can take over the compensation.
  • the same purpose is fulfilled by an elastic part which is designed in the manner of a bellows and is connected to the seat 20 and the backrest 25. A shapely transition can be achieved between the seat 20 and the backrest 25.
EP89108563A 1988-05-26 1989-05-12 Stuhl, insbesondere Arbeits- oder Bürostuhl Expired - Lifetime EP0343450B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89108563T ATE75114T1 (de) 1988-05-26 1989-05-12 Stuhl, insbesondere arbeits- oder buerostuhl.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3817761 1988-05-26
DE3817761A DE3817761A1 (de) 1988-05-19 1988-05-26 Stuhl, insbesondere arbeits- oder buerostuhl

Publications (2)

Publication Number Publication Date
EP0343450A1 EP0343450A1 (de) 1989-11-29
EP0343450B1 true EP0343450B1 (de) 1992-04-22

Family

ID=6355087

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89108563A Expired - Lifetime EP0343450B1 (de) 1988-05-26 1989-05-12 Stuhl, insbesondere Arbeits- oder Bürostuhl

Country Status (7)

Country Link
US (1) US5071189A (ja)
EP (1) EP0343450B1 (ja)
JP (1) JPH02191410A (ja)
AT (1) ATE75114T1 (ja)
CA (1) CA1320676C (ja)
DE (2) DE3817761A1 (ja)
ES (1) ES2032626T3 (ja)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0885575A3 (en) 1992-06-15 2000-08-30 Herman Miller, Inc. Adjustable arm rest
IL103477A0 (en) * 1992-10-20 1993-03-15 Paltechnica Nitzanim Office and like chairs
DE29612594U1 (de) * 1996-07-20 1996-09-19 Franck Klaus Reiner Vorrichtung zur Synchronanpassung von Sitz- und Rückenlehne eines Stuhles an die Körperhaltung eines Benutzers
DE10026475A1 (de) * 2000-05-27 2001-12-06 Haworth Bueroeinrichtung Gmbh Stuhl
IT1315528B1 (it) * 2000-10-18 2003-02-18 Enrico Cioncada Poltrona ad assetto variabile
US6644741B2 (en) 2001-09-20 2003-11-11 Haworth, Inc. Chair
US20030132653A1 (en) * 2001-10-18 2003-07-17 Doug Thole Tension control mechanism for a chair
US6945602B2 (en) * 2003-12-18 2005-09-20 Haworth, Inc. Tilt control mechanism for chair
US20070090671A1 (en) * 2005-10-06 2007-04-26 Rbm A/S; Weight regulator for a chair
US9777111B2 (en) * 2005-10-20 2017-10-03 Grupo Petrotemex, S.A. De C.V. PET polymer with improved properties
US7806478B1 (en) * 2006-01-04 2010-10-05 Sava Cvek Task chair with dual tilting capabilities
CN102151026B (zh) 2007-01-29 2016-05-18 赫尔曼米勒有限公司 座位结构及其使用方法
NO328092B1 (no) * 2008-03-10 2009-12-07 Efg Europ Furniture Group Ab Ryggestotteanordning
DE202009014380U1 (de) * 2009-10-23 2010-04-01 GLÖCKL, Josef Stehsitz
US20110304192A1 (en) * 2010-06-15 2011-12-15 Augustat Betty A Ergometric Chair Apparatus
USD697726S1 (en) 2012-09-20 2014-01-21 Steelcase Inc. Chair
US11304528B2 (en) 2012-09-20 2022-04-19 Steelcase Inc. Chair assembly with upholstery covering
US9706845B2 (en) 2012-09-20 2017-07-18 Steelcase Inc. Chair assembly
WO2015161281A1 (en) 2014-04-17 2015-10-22 Hni Technologies Inc. Chair and chair control assemblies, systems, and methods
US10194750B2 (en) 2015-04-13 2019-02-05 Steelcase Inc. Seating arrangement
MX2017013130A (es) 2015-04-13 2018-03-07 Steelcase Inc Disposicion de asiento.
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
WO2020172243A1 (en) 2019-02-21 2020-08-27 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
WO2020255195A1 (ja) * 2019-06-17 2020-12-24 株式会社クオリ 傾動椅子
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof

Family Cites Families (17)

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Publication number Priority date Publication date Assignee Title
US2433521A (en) * 1945-03-01 1947-12-30 Lorenz Anton Reclining article of furniture
US4429917A (en) * 1981-04-29 1984-02-07 Hauserman Inc. Int. Furniture & Textile Division Chair
ATE12168T1 (de) * 1981-08-19 1985-04-15 Giroflex Entwicklungs Ag Stuhl.
DE3232771A1 (de) * 1982-09-03 1984-03-08 Wilkhahn Wilkening + Hahne GmbH + Co, 3252 Bad Münder Arbeits-sitzmoebel
DE3322450A1 (de) * 1983-06-22 1985-01-10 August Fröscher GmbH & Co KG, 7141 Steinheim Vorrichtung zum verstellen des sitzes und der rueckenlehne von stuehlen
US4560199A (en) * 1983-07-22 1985-12-24 Pamont Ag Recliner chair
DE8326792U1 (de) * 1983-09-17 1984-01-05 Fromme, Heinrich, 4815 Schloß Holte-Stukenbrock Stuhl, insbesondere drehstuhl
ATE43954T1 (de) * 1984-10-23 1989-06-15 Protoned Bv Sitzmoebel.
DE8607194U1 (de) * 1986-03-15 1986-04-30 Drabert Söhne Minden (Westf.), 4950 Minden Sitzmöbel
DE3617623A1 (de) * 1986-05-26 1987-12-03 Drabert Soehne Stuhl
DE3632131C2 (de) * 1986-06-04 2001-12-13 Hartmut S Engel Funktions-Sitzmöbel
DE8616836U1 (ja) * 1986-06-24 1987-10-22 Hartmann, Guenter, 5800 Hagen, De
DE8617738U1 (ja) * 1986-07-03 1988-03-10 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart, De
DE3630503A1 (de) * 1986-09-08 1988-03-10 Girsberger Holding Ag Stuhl
DE8627482U1 (ja) * 1986-10-15 1989-07-06 Voelkle, Rolf, 7298 Lossburg, De
DE3642796A1 (de) * 1986-12-15 1988-06-23 Eckhard Hansen Punktsynchronverstelleinrichtung fuer buerostuehle, sitzmoebel o. dgl.
DE3737491C2 (de) * 1987-11-05 2003-03-20 Wilkhahn Wilkening & Hahne Stuhl

Also Published As

Publication number Publication date
CA1320676C (en) 1993-07-27
ATE75114T1 (de) 1992-05-15
US5071189A (en) 1991-12-10
DE58901223D1 (de) 1992-05-27
DE3817761A1 (de) 1989-11-30
EP0343450A1 (de) 1989-11-29
ES2032626T3 (es) 1993-02-16
DE3817761C2 (ja) 1990-05-10
JPH02191410A (ja) 1990-07-27

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