EP0332088B1 - Stuhl, insbesondere Arbeits und Bürostuhl - Google Patents

Stuhl, insbesondere Arbeits und Bürostuhl Download PDF

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Publication number
EP0332088B1
EP0332088B1 EP89103808A EP89103808A EP0332088B1 EP 0332088 B1 EP0332088 B1 EP 0332088B1 EP 89103808 A EP89103808 A EP 89103808A EP 89103808 A EP89103808 A EP 89103808A EP 0332088 B1 EP0332088 B1 EP 0332088B1
Authority
EP
European Patent Office
Prior art keywords
seat
backrest
chair
carrier
links
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
EP89103808A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0332088A1 (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 AT89103808T priority Critical patent/ATE66791T1/de
Publication of EP0332088A1 publication Critical patent/EP0332088A1/de
Application granted granted Critical
Publication of EP0332088B1 publication Critical patent/EP0332088B1/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
    • 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
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers

Definitions

  • the invention relates to a chair, in particular a work or office chair, with a seat support with a seat which can be pivoted in the front region about a horizontal pivot axis and whose inclination can be changed, and a backrest support with a backrest which can be changed in proportion to the inclination of the seat support, with which, with increasing inclination of the seat carrier, the backrest executes an additional relative movement downwards relative to the facing end of the seat carrier.
  • the known chairs of this type offer excellent seating comfort, since on the one hand they provide 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 bar has been tilted backwards.
  • the backrest bar When the backrest bar is tilted backwards, the upper body of the user does not simply make a swiveling movement, but rather a movement superimposed from various movement components results. Since the backrest performs an additional downward movement towards the seat when the backrest bar is tilted backwards, a relative movement between the back of the user and the backrest is avoided or at least reduced to an undetectable value.
  • the chair can be designed as a synchronous chair, in which a downward inclination of the seat support carrying the seat inevitably brings about a backward inclination of the backrest bar with a larger angle of inclination.
  • the seat support with the seat can also be guided to be extendable on the bearing block.
  • multi-link lever chains are used, as shown in EP 0176816 A1, or, on the other hand, pairs of transmission levers and drive arches as shown in EP 0085870 A1.
  • many parts are required for the adjustment device.
  • a chair according to DE 2916897 A1 in which, when the seat is pulled out, the backrest on the backrest bar is displaced in the direction of the seat.
  • the backrest support is articulated on at least one handlebar, which itself is close to the pivot axis of the seat support is rotatably mounted on the chair frame that the handlebar carries a driver between the articulation axis of the backrest support and the axis of rotation on the chair frame, which is adjustably guided in a guide slot of the seat support, and that the backrest support is preferably articulated on both sides above its articulation axis with a pivot lever is, which is also pivotally mounted on the chair frame in the region of the pivot axis of the seat support.
  • the adjustment device only one link and two pivot levers are required as a minimum.
  • the handlebar takes over the lowering of the backrest support relative to the facing end of the seat support with the seat, while the swivel lever takes over the disproportionate change in the inclination of the backrest support with the backrest as soon as the inclination of the seat support changes with the seat in one direction or the other.
  • the seat support and the seat can be produced as a solid, compact unit. Then only the handlebars and the swivel levers need to be attached and the connection to the chair frame made.
  • a non-tiltable articulation of the backrest support with the backrest is achieved according to one embodiment in that a pair of links is provided, which are integrally connected to one another in the central region of the width and to the backrest support in an articulated manner, that the chair frame has a horizontal bearing sleeve that has the pivot axis of the seat carrier and a return spring that two bearing brackets are formed on the bearing sleeve, on which the handlebars are rotatably mounted, and that two brackets with slot slots designed as elongated holes are attached to the seat bracket, in which carriers designed as bolts are adjustably guided.
  • the pivot bearing of the seat support is solved according to one embodiment so that two bearing brackets are attached to the seat support, which are inserted through circumferential slots in the bearing sleeve and connected in a rotationally fixed manner to the pivot axis which is rotatably mounted in the bearing sleeve and is under the tension of the return spring. It is advantageously provided that the bearing sleeve is connected in the end regions by means of two V-shaped support arms with an approximately centrally arranged column of the chair frame and that the column, the support arms and the bearing sleeve with the mounting brackets for the handlebars are made as a one-piece casting.
  • the adjustment of the handlebars by means of the seat support takes place in such a way that the drivers are arranged approximately in the middle of the depth of the seat support, that in the rear region of the seat support the lower end of the backrest support is articulated on the handlebars, and that the axis of rotation of the handlebars is arranged approximately in the middle between the pivot axis of the seat carrier and the drivers of the handlebars, the drivers and the axis of rotation in the initial position of the chair being approximately in a horizontal plane above the pivot axis of the seat carrier and this section of the handlebars being at a distance from the seat carrier.
  • the front area of the seat support and the seat are convexly curved downwards, this curvature in the starting position of the chair starting approximately above the pivot axis of the seat support and the seat, then the seat support with the seat becomes increasingly increasing in the front area Slightly lowered incline. It is also achieved with this adjustment device that the seat carrier moves with the seat slightly with increasing inclination towards the backrest, so that in the area of the user's knees no change in angle between the thigh and lower leg is required and the seating comfort regardless of the inclination of the seat and the backrest is preserved.
  • pivoting levers have angled end sections which are oriented approximately vertically in the starting position of the chair and are pivotably mounted on the pivot axis of the seat carrier and which are based on the change in inclination of the backrest carrier are coordinated.
  • the handlebars of the adjusting device can be used in a simple manner to determine the end positions of the seat support and thus also the backrest support, in that the sections of the handlebars between the drivers and the axis of rotation of the handlebars as stops limit the maximum inclination of the seat support and that the sections the handlebar between the drivers and the articulation axis of the backrest support as stops limit the return of the seat support with the seat to the starting position.
  • a particularly advantageous embodiment is characterized in that the pivoting levers are designed as armrests or carry armrests.
  • the centrally arranged column of the chair frame does not hinder the lowering of the seat support with the seat, it is provided that the two links are at a distance from each other which is greater than the assigned dimension of the column of the chair frame, and that the links are symmetrical to the column are arranged.
  • Shaped on the column 10 are two V-shaped support arms 11 and 12 which are directed towards the front of the chair and are connected at one end to the horizontal bearing sleeve 31 in one piece.
  • two bearing straps 14 and 20 formed as double straps are formed in the central region of the bearing sleeve 31 and are used for the rotatable mounting of two links 16 and 21, as the axis of rotation 15 shows.
  • the bearing brackets 14 and 20 protrude upwards and towards the rear of the chair from the bearing sleeve 31, so that the axis of rotation 15 lies above the pivot axis 13 which is rotatably supported in the bearing sleeve 31.
  • the bearing sleeve 31 also receives the return spring which holds the seat support 25 with the seat 26 in the starting position shown in FIG. 1. This starting position can be limited by stops in the bearing sleeve 31 or on the links 16 and 21.
  • the seat support 25 carries in the front area on the underside the two bearing brackets 27 and 29, which are inserted through circumferential slots 28 and 30 into the bearing sleeve 31 and rotatably with them the pivot axis 13 are connected.
  • the circumferential slots 28 and 30 allow the pivoting movement of the bearing brackets 27 and 29 between the starting position according to FIG. 1 and the lowered end position of the seat support 25 according to FIG. 3.
  • the links 16 and 21 are guided into the rear region of the seat support 25 and carry the articulation axis 17 for the lower end of the backrest support 18, on which the backrest 19 can be firmly attached and which, like the backrest 19, can be anatomically shaped.
  • the links 16 and 21 carry drivers 23, which can be designed as bolts.
  • the drivers 23 of both links 16 and 21 can also be formed by a single bolt.
  • the drivers 23 are guided in the middle region of the seat support 25 in approximately horizontal guide slots 24 of bearing brackets 22 so as to be adjustable.
  • the bearing brackets 22 are attached to the underside of the seat support 25.
  • the pivot axis 13 protrudes from both ends of the bearing sleeve 13 and serves as a pivot bearing for the two pivot levers 32 and 34, which are pivotally connected at their other ends by means of the pivot bearings 33 and 35 to the backrest support 18 via the pivot axis 17.
  • the end portions 36 and 37 of the pivot levers 32 and 34 facing the pivot axis 13 are angled such that they are oriented approximately vertically in the starting position of the chair. The length of these end sections 36 and 37 is adjusted so that when the bearings 33 and 35 move on the track 38, the inclination of the backrest support 18 increases or decreases disproportionately to the inclination of the seat support 25.
  • the seat 26 can be firmly connected to the seat support 25.
  • the pivot levers 32 and 34 can carry armrests or can even be designed as armrests.
  • the view according to FIG. 2 shows that the distance between the two links 16 and 21, which ensure that the backrest support 18 with the backrest 19 cannot be tilted, is somewhat larger than the dimension, for example the diameter, of the column 10.
  • the Handlebars 16 and 21 additionally arranged symmetrically to the column 10, then it does not hinder the lowering of the handlebars 16 and 21 into the area of the column 10.
  • the lowering can also be limited in that the sections of the links 16 and 21 carry 15 stops between the drivers 23 and the axis of rotation or serve as stops themselves.
  • the seat support 25 with the seat 26 is moved slightly in the direction of the backrest 19, as can be seen in FIG. 3.
  • the seat support 25 lowers slightly with the seat 26 in the front area.
  • the front edges of the seat support 25 and the seat 26 are rounded convexly downward, the rounding starting approximately above the pivot axis 13 when the chair is in the starting position according to FIG. 1 and the bearing plates 27 and 29 are preferably directed approximately vertically upwards.
  • the additional adjustment of the seat support 25 with the seat 26 in the direction of the backrest 19 in connection with the lowering of the seat support 25 with the seat 26 in the front region has the advantage that the angle between the thigh and lower leg of the user from the change in inclination of the seat support 25 the seat 26 remains and thus the seating comfort is maintained in every position of the chair.

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)
  • Special Chairs (AREA)
EP89103808A 1988-03-10 1989-03-04 Stuhl, insbesondere Arbeits und Bürostuhl Expired - Lifetime EP0332088B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89103808T ATE66791T1 (de) 1988-03-10 1989-03-04 Stuhl, insbesondere arbeits und buerostuhl.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3807984A DE3807984A1 (de) 1988-03-10 1988-03-10 Stuhl, insbesondere arbeits- oder buerostuhl
DE3807984 1988-03-10

Publications (2)

Publication Number Publication Date
EP0332088A1 EP0332088A1 (de) 1989-09-13
EP0332088B1 true EP0332088B1 (de) 1991-09-04

Family

ID=6349393

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89103808A Expired - Lifetime EP0332088B1 (de) 1988-03-10 1989-03-04 Stuhl, insbesondere Arbeits und Bürostuhl

Country Status (3)

Country Link
EP (1) EP0332088B1 (enrdf_load_stackoverflow)
AT (1) ATE66791T1 (enrdf_load_stackoverflow)
DE (2) DE3807984A1 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2047303T3 (es) * 1989-09-21 1994-02-16 Provenda Marketing Ag Casco de asiento y utilizacion del casco de asiento para un programa de sillas.
DE4319450C1 (de) * 1993-06-11 1994-07-07 Simon Desanta Stuhl

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7631908U1 (de) * 1976-10-13 1978-04-13 Moll, Reiner, 7070 Schwaebisch Gmuend Lehnstuhl
DE3537203A1 (de) * 1984-10-24 1986-04-24 Klöber GmbH & Co, 7770 Überlingen Arbeitsstuhl mit neigungsmechanik von sitzschale und rueckenlehne
DE8515221U1 (de) * 1985-05-23 1986-05-22 VOKO - Franz Vogt & Co, 6301 Pohlheim Sitzmöbel
DE3632131C2 (de) * 1986-06-04 2001-12-13 Hartmut S Engel Funktions-Sitzmöbel
DE8807931U1 (de) * 1988-06-20 1988-08-11 Wiesner-Hager KG, Altheim Sitzmöbel, insbesondere Büro-Drehstuhl

Also Published As

Publication number Publication date
DE58900251D1 (de) 1991-10-10
EP0332088A1 (de) 1989-09-13
ATE66791T1 (de) 1991-09-15
DE3807984A1 (de) 1989-09-21
DE3807984C2 (enrdf_load_stackoverflow) 1990-05-10

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