EP2070444B1 - Siège de bureau - Google Patents

Siège de bureau Download PDF

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Publication number
EP2070444B1
EP2070444B1 EP08020611A EP08020611A EP2070444B1 EP 2070444 B1 EP2070444 B1 EP 2070444B1 EP 08020611 A EP08020611 A EP 08020611A EP 08020611 A EP08020611 A EP 08020611A EP 2070444 B1 EP2070444 B1 EP 2070444B1
Authority
EP
European Patent Office
Prior art keywords
seat
bearing
housing
back rest
backrest
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP08020611A
Other languages
German (de)
English (en)
Other versions
EP2070444A1 (fr
Inventor
Thomas Stenzel
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.)
Sedus Stoll AG
Original Assignee
Sedus Stoll AG
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 Sedus Stoll AG filed Critical Sedus Stoll AG
Publication of EP2070444A1 publication Critical patent/EP2070444A1/fr
Application granted granted Critical
Publication of EP2070444B1 publication Critical patent/EP2070444B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs

Definitions

  • the present invention relates to an office chair with tiltable backrest and a forcibly coupled via a synchronous mechanism with the backrest tiltable seat, wherein a pivoting movement of the backrest induces a downward movement of the gur section of the seat, wherein the synchronous mechanism comprises a housing disposed under the seat, on which the seat is mounted on a rear seat link with a first fixed housing and a second seat-fixed bearing.
  • Such an office chair is for example off DE 199 21 153 A1 known, wherein the seat is also mounted at its front end via a seat link in the housing.
  • a pivotal movement of the backrest to the rear - as can be caused for example by leaning of the chair user to the backrest - induces a lowering movement of the rear part of the seat, which is superimposed on a displacement of the seat to the rear.
  • the backrest is stored, inter alia, in the seat-fixed bearing of the rear seat arm, the distance between the seat and backrest, however, remains unchanged.
  • the object of the synchronous mechanism is to allow a dynamic sitting, in which the user can change his sitting posture between a front, substantially upright and a rear, slightly reclined sitting posture.
  • the Synchronous mechanics should support the user in the best possible way. For design, practical and ergonomic reasons, however, must always be made in the realization of synchronous mechanisms compromises, so that a certain design can not meet all ergonomic requirements at once optimally.
  • Typical weak points of known constructions including the aforementioned are a more or less marked iliac crest and / or lordosis loss and the so-called "shirt extraction effect".
  • three reference points can be defined as follows: A hip point on the user's hip joint axis, this point being assumed to be fixed relative to the seat; a iliac crest on the front of the backrest at the level of the iliac crest of the user; and a lumbar point also at the front of the backrest but at the level of the user's lumbar spine.
  • a iliac crest loss occurs when starting from the anterior sitting posture in which the user has contact with the iliac crest by appropriate choice of his sitting position and thus the hip joint point on the seat, increasing the distance between the hip point and the iliac crest when reclining and thereby increasing the user's comfort loses this contact.
  • the "shirt pull-out effect" occurs when the backrest is displaced parallel to the back of the user during pivoting under friction.
  • the invention has as its object to provide an office chair of the type mentioned, in which the iliac crest and lordosis loss and the "shirt extraction effect" over known constructions are reduced to a level that is at least no longer relevant to the user. In addition, the "whipping" should be avoided.
  • the inventive office chair is therefore characterized in that the backrest is mounted on the housing in a third housing fixed bearing and that the forced coupling between the seat and the backrest in the housing via at least one Connecting rod between the backrest and the rear seat handlebar and is translated so that the seat moves backwards towards the backrest with the inclination of the backrest and that the seat and the backrest are biased by a spring assembly (80) against a position of lowest inclination ,
  • the distance between the hip point on the one hand and the iliac crest or lumbar point on the other hand can be kept substantially constant in all inclinations, so that it can not lead to a noticeable iliac crest / lordosis loss.
  • a friction effect between the backrest and the back of the user is avoided, so that even the described "shirt pull-out effect" can not occur.
  • the inventive storage of the seat on the rear seat handlebars on the first, fixed bearing housing finally allows in a simple way to avoid the "whipping", provided that the lever arm between the first and the second bearing of the rear seat steering in the position with the lowest inclination of the seat and the backrest is aligned substantially vertically, as is the subject of claim 2.
  • FIG. 1 and 2 Denote 10 the seat and 20, the backrest, which are each pivotally mounted in a housing 10 arranged under the housing 30.
  • the housing 30 is supported by a pedestal 40 and is part or includes parts of a synchronous mechanism for positive coupling of the seat 10 with the backrest 20. Due to the forced coupling seat 10 and backrest 20 can only move together.
  • the seat 10 has a lower seat plate 11 and thereon a seat pad 12.
  • the backrest 20 comprises a backrest support 21 and also provided with a padding 23 backrest plate 22.
  • the backrest support 21 is fork-shaped and surrounds the housing 30 with two arms from both sides, wherein in the FIGS. 1 . 2 only the front arm can be seen.
  • Fig. 1 shows the seat 10 and the backrest 20 of their basic position, each with the lowest inclination, wherein the backrest plate 22 of the backrest 20 is approximately perpendicular.
  • Fig. 2 shows the seat 10 and the backrest 20 in its position with maximum inclination shows, the seat 10 pivoted by an angle of 9.5 ° and the backrest 20 by an angle of 28.5 ° relative to the basic position are such that the tilt ratio is about 3: 1.
  • the seat 10 is in the position of Fig. 2 towards the basic position of Fig. 1 horizontally 36 mm shifted backwards against the backrest 20.
  • the distances between the hip joint point PH and the iliac crest point PB and between the hip joint point PH and the lordosis point PL are thus approximately the same in both illustrated positions.
  • the changes in the distance between the two positions are less than 10%. This results in the office chair shown no noticeable iliac crest and lordosis and also the mentioned "shirt extraction effect" does not occur.
  • the housing 30 is divided into two along a central vertical plane and has two mirror-image housing shells 31.
  • the synchronous mechanism is also constructed in mirror image to this vertical plane. As already described, this also applies to the backrest carrier 21. The further description is therefore limited to the structure of only one of the two game-pictorial halves.
  • the seat 10 In its rear region, the seat 10 is mounted via a rear seat link 50 with a bearing 51 fixed to the housing, arranged behind the pedestal 40, and a seat-fixed bearing 52. In the in Fig. 4 In the illustrated basic position, the rear seat handle 50 is oriented approximately vertically.
  • a front seat arm 60 In the region of its front edge of the seat 10 is mounted on a front seat arm 60 with a housing-fixed bearing 61 and a seat-fixed bearing 62.
  • the backrest support 21 is, as in Fig. 3 can be seen, stored in a housing-fixed, arranged in front of the pedestal 40 bearing 24.
  • the positive coupling between the seat 10 and the backrest 20 is made via a connecting rod 70, which is hinged to the rear seat arm 50 in a bearing 53 below the housing 51 fixed to the bearing.
  • the rear seat link 50 is extended beyond the bearing 51 out with a handlebar down and thereby forms a two-armed lever.
  • the connecting rod 70 is articulated in a bearing 25 below the housing-fixed bearing 24.
  • the distance or lever arm between the bearings 51 and 53 am rear seat link 50 is shorter and only about half as long as the distance or lever arm between the bearings 24 and 25 on the backrest support 21st
  • a spring 80 is clamped, which is compressed at inclination of the backrest 20 and the backrest 20 is acted upon by a restoring force in its basic position.
  • the connecting rod 70 acts as a push rod and rotates the rear seat handle 50 counterclockwise.
  • the seat 10 Due to the mounting of the seat 10 on the substantially vertically oriented rear seat arm 50 on the housing-fixed bearing 51, it can not come to a tilt adjustment under load of the seat 10 without leaning against the backrest 20. For a tilt adjustment, it comes only by pushing back the backrest 20 against the action of the spring 80. A whipping of the backrest 20 in shock-like load of the seat 10, as occurs in other synchronous mechanisms, is thereby avoided.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Claims (7)

  1. Chaise de bureau avec dossier (20) inclinable et une assise (10) inclinable asservie au dossier par un mécanisme de synchronisation, dans laquelle un mouvement de bascule du dossier vers l'arrière induit un mouvement d'abaissement de la partie arrière de l'assise, dans laquelle le mécanisme de synchronisation comprend un boîtier (30) disposé sous l'assise, sur lequel l'assise est montée par l'intermédiaire d'un bras d'assise arrière (50) avec un premier palier (51) fixé sur le boîtier et un deuxième palier (52) fixé sur l'assise, caractérisée en ce que le dossier est monté sur le boîtier par un troisième palier (24) fixé sur le boîtier et en ce que l'asservissement entre l'assise et le dossier est généré dans le boîtier par au moins une barre de raccordement (70) entre le dossier et le bras d'assise arrière et est ainsi transmis, en ce que l'assise se déplace en direction du dossier lors de l'inclinaison de celui-ci vers l'arrière, et que l'assise et le dossier sont précontraints vers une position d'inclinaison minimale par l'intermédiaire d'un arrangement de ressorts (80).
  2. Chaise de bureau selon la revendication 1, caractérisée en ce que dans la position d'inclinaison minimale le bras d'assise arrière (50) est orienté sensiblement à la verticale.
  3. Chaise de bureau selon l'une quelconque des revendications 1 ou 2, caractérisée en ce que le premier palier (51) fixe par rapport au bras d'assise arrière (50) est monté dans le boîtier (30) derrière le troisième palier (24) fixe par rapport au dossier (20).
  4. Chaise de bureau selon l'une quelconque des revendicationss 1 à 3, caractérisée en ce que la au moins une barre de raccordement (70) est articulée sur le bras d'assise arrière (50) en un quatrième palier (53) en dessous du premier palier (51) de celui-ci, en ce que la au moins une barre de raccordement (70) est articulée sur le dossier (20) en un cinquième palier (25) en dessous du troisième palier (24) de celui-ci et que le bras de levier entre le premier (51) et le quatrième palier (53) est plus court que le bras de levier entre le troisième palier (24) et le cinquième palier (25).
  5. Chaise de bureau selon l'une quelconque des revendications 1 à 4, caractérisée en ce que l'assise (10) est montée au niveau de son arête avant dans le boîtier (30) par un bras d'assise avant (60).
  6. Siège selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le rapport d'inclinaison entre le dossier (20) et l'assise (10) est situé entre 2,8: 1 et 3,2: 1 et en ce que pour une inclinaison du dossier de 26° à 30° l'assise est déplacée horizontalement sur une distance de 30 à 40 mm.
  7. Siège selon l'une quelconque des revendications 1 à 6, caractérisé en ce que lors de l'inclinaison du dossier (20) l'assise est déplacée en direction du dossier à une distance telle que les écartements entre le point de hanche (PH) et le point de lordose (PL), ainsi qu'entre le point de hanche (PH) et le point de bassin (PB) ne soient pas modifiés de plus de 10%.
EP08020611A 2007-12-11 2008-11-27 Siège de bureau Active EP2070444B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007059986A DE102007059986A1 (de) 2007-12-11 2007-12-11 Bürostuhl

Publications (2)

Publication Number Publication Date
EP2070444A1 EP2070444A1 (fr) 2009-06-17
EP2070444B1 true EP2070444B1 (fr) 2010-04-28

Family

ID=40230011

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08020611A Active EP2070444B1 (fr) 2007-12-11 2008-11-27 Siège de bureau

Country Status (4)

Country Link
EP (1) EP2070444B1 (fr)
AT (1) ATE465656T1 (fr)
DE (2) DE102007059986A1 (fr)
ES (1) ES2342030T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9004597B2 (en) 2012-09-20 2015-04-14 Steelcase Inc. Chair back mechanism and control assembly

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011118037A1 (de) 2011-06-16 2012-12-20 Henkel Ag & Co. Kgaa Geschirrspülmittel mit Bleichkatalysator und Protease
DE102011081588A1 (de) * 2011-08-25 2013-02-28 Johannes Uhlenbrock Synchronmechanik für einen Stuhl
US9706845B2 (en) 2012-09-20 2017-07-18 Steelcase Inc. Chair assembly
US11304528B2 (en) 2012-09-20 2022-04-19 Steelcase Inc. Chair assembly with upholstery covering
JP6040817B2 (ja) 2013-03-21 2016-12-07 トヨタ紡織株式会社 乗物用シート
WO2020247435A1 (fr) * 2019-06-05 2020-12-10 Davis Furniture Industries, Inc. Chaise inclinable améliorée

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3617623A1 (de) * 1986-05-26 1987-12-03 Drabert Soehne Stuhl
DE19823632C1 (de) * 1998-05-27 1999-09-30 Roeder Peter Stuhl, insbesondere Bürostuhl
DE19921153A1 (de) 1999-05-07 2000-11-09 Bock 1 Gmbh & Co Synchronmechanik für eine korrelierte Sitz-Rückenlehnen-Bewegung eines Bürostuhles
DE10048783A1 (de) 2000-09-29 2002-05-29 Stoll Sedus Ag Stuhl mit neigbarem Sitz
DE10125994A1 (de) * 2001-05-18 2002-11-21 Bock 1 Gmbh & Co Synchronmechanik für eine korrelierte Sitz-Rückenlehnen-Bewegung eines Bürostuhles
DE202005011725U1 (de) * 2005-07-27 2006-12-07 Sander, Armin Stuhl, insbesondere Bürostuhl

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9004597B2 (en) 2012-09-20 2015-04-14 Steelcase Inc. Chair back mechanism and control assembly
US9010859B2 (en) 2012-09-20 2015-04-21 Steelcase Inc. Chair assembly
US9022476B2 (en) 2012-09-20 2015-05-05 Steelcase Inc. Control assembly for chair
US9027998B2 (en) 2012-09-20 2015-05-12 Steelcase Inc. Chair assembly
US9027999B2 (en) 2012-09-20 2015-05-12 Steelcase Inc. Control assembly for chair
US9027997B2 (en) 2012-09-20 2015-05-12 Steelcasel Inc. Chair assembly
US9049935B2 (en) 2012-09-20 2015-06-09 Steelcase Inc. Control assembly for chair
USD742676S1 (en) 2012-09-20 2015-11-10 Steelcase Inc. Chair
USD742677S1 (en) 2012-09-20 2015-11-10 Steelcase Inc. Chair
US9345328B2 (en) 2012-09-20 2016-05-24 Steelcase Inc. Chair assembly with upholstery covering
US9451826B2 (en) 2012-09-20 2016-09-27 Steelcase Inc. Chair assembly
US9462888B2 (en) 2012-09-20 2016-10-11 Steelcase Inc. Control assembly for chair
US9492013B2 (en) 2012-09-20 2016-11-15 Steelcase Inc. Chair back mechanism and control assembly

Also Published As

Publication number Publication date
ES2342030T3 (es) 2010-06-30
DE502008000595D1 (de) 2010-06-10
EP2070444A1 (fr) 2009-06-17
DE102007059986A1 (de) 2009-06-18
ATE465656T1 (de) 2010-05-15

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