EP0591932B1 - Chaise, notamment chaise de travail - Google Patents

Chaise, notamment chaise de travail Download PDF

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Publication number
EP0591932B1
EP0591932B1 EP93116099A EP93116099A EP0591932B1 EP 0591932 B1 EP0591932 B1 EP 0591932B1 EP 93116099 A EP93116099 A EP 93116099A EP 93116099 A EP93116099 A EP 93116099A EP 0591932 B1 EP0591932 B1 EP 0591932B1
Authority
EP
European Patent Office
Prior art keywords
seat
carrier
chair
joint
seat part
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
EP93116099A
Other languages
German (de)
English (en)
Other versions
EP0591932A1 (fr
Inventor
Manfred Rainer Kleinikel
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.)
Comforto GmbH
Original Assignee
Comforto 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 Comforto GmbH filed Critical Comforto GmbH
Publication of EP0591932A1 publication Critical patent/EP0591932A1/fr
Application granted granted Critical
Publication of EP0591932B1 publication Critical patent/EP0591932B1/fr
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
    • 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 invention relates to a chair, in particular an office or work chair, as specified in the preamble of claim 1.
  • a chair is known from DE 40 41 157 A1.
  • the backrest is always tilted backwards with a downward movement of the rear area of the seat support is coupled, in a chair of the type mentioned the entire seat part is raised when the backrest is tilted backwards.
  • This has the advantage that the restoring force for returning the backrest into the upright position is applied directly by the weight of the person sitting on the seat part. It is therefore not necessary to use this restoring force through energy stores such as gas springs or the like. which must be adjusted to the weight of a user.
  • a disadvantage of the known chair is that the lifting of the seat part when the backrest is tilted backwards is unusual and even uncomfortable for the user, in particular because it is associated with a shift in the seat pressure in the direction of the front edge of the seat, to the extreme case that the contact of the feet with the floor is lost due to the upward movement of the front part of the seat.
  • the invention has for its object to design a chair of the type mentioned with structurally simple means so that the desired upward movement of the seat part for generating the counterforce to the backward inclination of the backrest is such that it is ergonomically advantageous and is not perceived by the user as uncomfortable .
  • the trajectory of the four-bar transmission guiding the seat part which can be influenced by the choice of the lengths and joint distances of the handlebars is designed in accordance with the invention in such a way that there is a combined pivoting and translational movement of the seat part which corresponds to a pivoting about an imaginary axis which is in front of the front edge of the seat part and so that it runs in the area of the knee joint axis of a seated person. This ensures that the contact between feet and floor remains almost constant over the entire range of motion and the above-mentioned disadvantageous shifting of the seat pressure into the back of the knee does not take place.
  • the chair shown has a base frame 6, to which a seat support 1 is preferably attached in a rotatable and height-adjustable manner.
  • a seat support 1 On the seat support 1, the approximately horizontally extending arm of the backrest support 4 is mounted in a horizontal-axis swivel joint D, which carries the backrest 8 with its other, upward-pointing arm.
  • a section of the back support 4, which is extended towards the front via the swivel joint D, is articulated in a connecting joint C to the seat part 3, which carries a seat plate with cushion 7.
  • the seat part 3 in the joint B is connected to a double joint lever 2 which is articulated in the joint A on the seat support 1.
  • An arm 9 of the back support 4 projecting downward from the swivel joint D is supported against the seat support 1 by an energy accumulator 9.
  • the section 10 of the back support 4 lying between the swivel joint D and the connecting joint C forms a rear linker, and the double articulated lever 2 forms a front link of a four-link mechanism leading the seat part 3 with the articulation points A, B, C and D.
  • the link 10 is from the swivel joint D. from almost horizontally directed towards the front, while the front link 2 also runs forward from the seat support-side joint A and inclines upward at an acute angle.
  • the seat support 3 and thus the seat plate 7 is moved upwards when the backrest 8 is tilted back into the dashed position, with a combined translational and rotary movement which corresponds to a pivoting about an imaginary horizontal pivot axis K, which is located at a distance in front of and slightly above the front edge of the seat plate 7, approximately where the knee joint axis of a person of normal size sitting on the seat plate 7 would be.
  • the up and down movement of the seat plate 7 associated with the change in inclination of the backrest 8 thus leaves the position of the knees of the user, and thus the contact of the feet with the floor is essentially unaffected.
  • the restoring moment counteracting the backward inclination of the backrest 8 is, as mentioned at the outset, applied by the weight of the person sitting on the seat plate 7.
  • the energy accumulator 5 does not need to apply this restoring moment, but only serves to hold the chair in a defined position in the unoccupied state.
  • conventional locking means acting on the energy accumulator or other parts of the synchronous mechanism can also be provided in order to also rigidly lock the chair in a desired position.
  • the drawing shows only the parts that are essential for the kinematics in the drawing plane. It goes without saying that the joints, links, etc. shown are designed or arranged twice so that the seat part and back support are adequately supported over the width of the chair.

Landscapes

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

Claims (4)

  1. Chaise, en particulier chaise de bureau ou de travail, avec un support de siège (1), un support de dossier (4) monté sur le support de siège (1) par une articulation de pivotement (D) et un siège (3, 7) qui est relié, dans sa zone avant, au support de siège (1) au moyen d'un levier à double articulation (2), et est relié au support de dossier (4) au niveau d'une articulation de liaison (C) qui se situe à l'arrière, le levier à double articulation (2) formant une biellette antérieure et la partie (10) du support de dossier (4) située entre l'articulation de pivotement (D) et l'articulation de liaison (C) formant une biellette postérieure d'un quadrilatère articulé de guidage du siège (3, 7) qui, lors de l'inclinaison du support de dossier (4) vers l'arrière entraîne un soulèvement du siège (3, 7) par rapport au support de siège (1), caractérisée en ce que les longueurs de la biellette avant (2) et de la biellette arrière (10) et la position de leurs points d'articulation (A, B, C, D) sont choisis, de telle sorte que le mouvement du support de siège (3, 7) qu'elles commandent soit approximativement un mouvement de pivotement autour d'un axe de pivotement horizontal imaginaire (K) situé en avant du bord avant du siège (3, 7).
  2. Chaise selon la revendication 1, caractérisée en ce que l'axe de pivotement imaginaire (K) correspond approximativement a l'axe de l'articulation des genoux d'une personne assise sur le siège (3, 7).
  3. Chaise selon la revendication 1 ou 2, caractérisée en ce que le support de dossier (4) comporte un bras quasiment horizontal engagé sous le siège (3, 7) qui est monté sur le support de siège (1) au niveau de l'articulation de pivotement (D) et dont la partie (10), se prolongeant vers l'avant au-delà de l'articulation de pivotement (D), constitue la biellette postérieure reliée au siège au niveau de l'articulation de liaison (C).
  4. Chaise selon l'une quelconque des revendications 1 à 3, caractérisée en ce qu'il est prévu un accumulateur d'énergie (5) attaquant le support de dossier (4) ou le support de siège (3, 7) ou encore l'une des biellettes (2, 10) et maintenant la chaise dans une position déterminée lorsqu'elle est inoccupée.
EP93116099A 1992-10-06 1993-10-05 Chaise, notamment chaise de travail Expired - Lifetime EP0591932B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4233628A DE4233628A1 (de) 1992-10-06 1992-10-06 Stuhl, insbesondere Büro- oder Arbeitsstuhl
DE4233628 1992-10-06

Publications (2)

Publication Number Publication Date
EP0591932A1 EP0591932A1 (fr) 1994-04-13
EP0591932B1 true EP0591932B1 (fr) 1995-12-20

Family

ID=6469786

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93116099A Expired - Lifetime EP0591932B1 (fr) 1992-10-06 1993-10-05 Chaise, notamment chaise de travail

Country Status (5)

Country Link
EP (1) EP0591932B1 (fr)
AT (1) ATE131701T1 (fr)
DE (2) DE4233628A1 (fr)
ES (1) ES2052470T3 (fr)
GR (1) GR940300043T1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6637072B2 (en) 2000-09-29 2003-10-28 Formway Furniture Limited Castored base for an office chair
US7441839B2 (en) 2000-09-28 2008-10-28 Formway Furniture Limited Reclinable chair
US11553797B2 (en) 2015-04-13 2023-01-17 Steelcase Inc. Seating arrangement

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ518944A (en) 2002-05-14 2004-09-24 Formway Furniture Ltd Height adjustable arm for chair with outer stem releasably lockable to inner stem by engagement of recesses
CN102098945B (zh) 2008-05-02 2013-11-06 霍沃思公司 用于重力响应式椅子的张力机构
CN203952966U (zh) * 2014-06-26 2014-11-26 陈国巨 椅背后仰时坐垫前移并同时下降的椅子
US10966527B2 (en) 2017-06-09 2021-04-06 Steelcase Inc. Seating arrangement and method of construction
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
US10021984B2 (en) 2015-04-13 2018-07-17 Steelcase Inc. Seating arrangement
CN108601453B (zh) 2016-02-05 2021-11-05 佛姆维家具有限公司 椅子和部件
ES3035683T3 (en) 2019-02-21 2025-09-08 Steelcase Inc Body support member
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8614185U1 (de) * 1986-05-26 1986-07-17 Drabert Söhne GmbH & Co, 4950 Minden Stuhl
US4834454A (en) * 1987-05-15 1989-05-30 Faultless-Doerner Manufacturing Inc. Office chair with tiltable seat and back
JPH06500944A (ja) * 1991-05-24 1994-01-27 エクウス・マーケティング・アーゲー 作業用椅子、特に事務用椅子

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7441839B2 (en) 2000-09-28 2008-10-28 Formway Furniture Limited Reclinable chair
US7798573B2 (en) 2000-09-28 2010-09-21 Formway Furniture Limited Reclinable chair
US6637072B2 (en) 2000-09-29 2003-10-28 Formway Furniture Limited Castored base for an office chair
US11553797B2 (en) 2015-04-13 2023-01-17 Steelcase Inc. Seating arrangement

Also Published As

Publication number Publication date
EP0591932A1 (fr) 1994-04-13
ATE131701T1 (de) 1996-01-15
ES2052470T1 (es) 1994-07-16
GR940300043T1 (en) 1994-07-29
DE59301201D1 (de) 1996-02-01
ES2052470T3 (es) 1996-04-16
DE4233628A1 (de) 1994-04-07

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