EP0552388A1 - Dossier pour siège de bureau - Google Patents

Dossier pour siège de bureau Download PDF

Info

Publication number
EP0552388A1
EP0552388A1 EP92100807A EP92100807A EP0552388A1 EP 0552388 A1 EP0552388 A1 EP 0552388A1 EP 92100807 A EP92100807 A EP 92100807A EP 92100807 A EP92100807 A EP 92100807A EP 0552388 A1 EP0552388 A1 EP 0552388A1
Authority
EP
European Patent Office
Prior art keywords
backrest
lumbar
shoulder
shoulder part
spring elements
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.)
Granted
Application number
EP92100807A
Other languages
German (de)
English (en)
Other versions
EP0552388B1 (fr
Inventor
Günter Wassermann
Thomas Stenzel
Horst Ziegler
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.)
Christof Stoll GmbH and Co KG
Original Assignee
Christof Stoll GmbH and Co KG
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 Christof Stoll GmbH and Co KG filed Critical Christof Stoll GmbH and Co KG
Priority to DE92100807T priority Critical patent/DE59200011D1/de
Priority to EP92100807A priority patent/EP0552388B1/fr
Priority to AT92100807T priority patent/ATE94038T1/de
Publication of EP0552388A1 publication Critical patent/EP0552388A1/fr
Application granted granted Critical
Publication of EP0552388B1 publication Critical patent/EP0552388B1/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
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/445—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with bar or leaf springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/448—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with resilient blocks

Definitions

  • the invention relates to the field of office seating.
  • a backrest for an office chair which is designed as a shell consisting of a lower lumbar part and an upper shoulder part, these two parts being connected to one another in an articulated manner, and the shoulder part being held in the front position in the unused state by means of spring elements provided in the articulated connection becomes.
  • Such a backrest is known for example from DE-A 3743013.
  • This document describes a horizontally divided backrest for an office chair, the two parts in the lumbar region being connected to one another by means of an articulated bracket via two articulated axes lying one above the other.
  • the aim of this is to ensure that the upper part of the backrest does not move sharply over an axis when leaning back, but rather moves softly and largely without kinks to the rear in the region of the user's lumbar spine.
  • the backrest should bend according to a bend line that corresponds to the natural curvature of the spine and provide a constant back support.
  • a seat-back construction for an office chair in which the backrest shell is divided into a lower pelvic or lumbar and an upper shoulder part, and these two parts are connected to one another on the outer sides via joints.
  • the two back shell parts can be pivoted relative to one another from a stop position against a spring support. This is to avoid an otherwise common back support protruding from the back and to achieve a narrow side silhouette.
  • An office chair with a split backrest is known from EP-B 0277912, the segments of which are arranged one above the other are connected to one another by two spring joints arranged at a distance from one another.
  • the spring joints consist of resilient round rods. This is to avoid hinges with separate springs, which - attached to the outside of the backrest - result in constructional problems due to the curvature of the backrest, and - attached in the middle of the backrest - cause difficulties with regard to the stability of the backrest.
  • a chair is known with two supports for the backrest which are directed upwards on the outer sides of the seat and which are connected to one another in the lower part via a spring joint.
  • the backrest has no lumbar part supporting the user in the lumbar region, and the spring joints essentially only affect the mobility of the shoulder support.
  • the essence of the invention is that the lumbar and shoulder parts of the backrest are not connected to one another via a point-like hinge joint, but instead via the bending zone of the connecting elastic bands.
  • the bending line of these ligaments corresponds optimally to the deformation of the user's spine when leaning back in the lumbar region.
  • the aluminum brackets mean that the lumbar and shoulder parts can only move between two well-defined stop positions.
  • the prestressed spring elements mean that the shoulder part only begins to move when the pressure is high.
  • the construction resulting from the invention is extremely simple and comprises only a few parts. It is therefore very inexpensive to produce.
  • FIG. 1 schematically shows a backrest consisting of a lower lumbar part 1 and an upper shoulder part 2, which is connected to the seat 10 and the pedestal 12 of an office chair via a synchronous mechanism 11.
  • the synchronous mechanism 11 is preferably designed as in EP-A 86102522.9.
  • the lumbar part 1 is fastened to the backrest support 9 and moves back / down when the seat 10 is lowered.
  • the backrest consists of a one-piece self-supporting shell made of a material with a certain intrinsic elasticity, preferably made of polypropylene plastic, which has a horizontally extending slot 13 in the lower region, the outside through vertical short slots is completed.
  • the convex brackets 5 and 6 made of die-cast aluminum are fastened to the lumbar part 1 by means of a hinge 14 and 15, respectively. They have noses at their ends.
  • pressure acting springs preferably cylindrical PUR plastic springs 7,8 are used, which are set and held under tension by covers 16 screwed onto the lumbar part 1 or shoulder part 2.
  • the bracket 5, 6 can advantageously also consist of magnesium or correspondingly stiff glass fiber reinforced plastic. In principle, steel springs could also be used instead of the plastic springs.
  • Lumbar part 1 and shoulder part 2 lie on the concave back of the brackets 5, 6 such that the shoulder part 2 is pressed into the front stop positions by the spring elements 7, 8 when not in use. However, if the user exerts a force on the shoulder part 2, the corresponding surfaces of the lumbar part 1 and the shoulder part 2 move into the other stop positions against the spring forces.
  • the articulated connection consisting of the elastic bands 3, 4 together with the brackets 5, 6 responds softly but in a defined manner, and not only works sagittally, but also torsionally. The latter is an effect which is not readily predictable and which is very favorable for the user.
  • the sequence of movements is determined by defined initial and final forces.
  • the twisting possibility of movement is deliberately restricted by the prestressed spring elements in order to exclude feelings of insecurity which can arise for the user due to the overall more elastic backrest.
  • the freedom of movement of the shoulder part 2 of the backrest is deliberately ended when the two brackets 5, 6 lie against the adjacent lumbar and shoulder parts of the backrest, which creates a continuously rigid backrest.
  • brackets 5, 6 In addition to the two brackets 5, 6, the entire construction only includes the spring cover 16 and bolts (not shown) for fastening the brackets 5, 6 in the hinges 14, 15 as individual parts. Production and assembly are therefore extremely simple and therefore inexpensive.

Landscapes

  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Finger-Pressure Massage (AREA)
EP92100807A 1992-01-20 1992-01-20 Dossier pour siège de bureau Expired - Lifetime EP0552388B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE92100807T DE59200011D1 (de) 1992-01-20 1992-01-20 Rückenlehne für einen Bürostuhl.
EP92100807A EP0552388B1 (fr) 1992-01-20 1992-01-20 Dossier pour siège de bureau
AT92100807T ATE94038T1 (de) 1992-01-20 1992-01-20 Rueckenlehne fuer einen buerostuhl.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92100807A EP0552388B1 (fr) 1992-01-20 1992-01-20 Dossier pour siège de bureau

Publications (2)

Publication Number Publication Date
EP0552388A1 true EP0552388A1 (fr) 1993-07-28
EP0552388B1 EP0552388B1 (fr) 1993-09-08

Family

ID=8209255

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92100807A Expired - Lifetime EP0552388B1 (fr) 1992-01-20 1992-01-20 Dossier pour siège de bureau

Country Status (3)

Country Link
EP (1) EP0552388B1 (fr)
AT (1) ATE94038T1 (fr)
DE (1) DE59200011D1 (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4427754A1 (de) * 1994-08-05 1996-02-15 Mauser Waldeck Ag Stuhl, insbesondere Drehstuhl
EP1118497A3 (fr) * 2000-01-15 2002-02-13 Volkswagen Aktiengesellschaft Siège de véhicule
US6739663B2 (en) * 2001-02-23 2004-05-25 Krueger International, Inc. Flexible bar-type back pivot mounting arrangement for a chair
US7118177B2 (en) * 2004-01-26 2006-10-10 Pro-Cord Spa Chair with tiltable backrest
EP1785068A1 (fr) * 2005-11-11 2007-05-16 Kokuyo Furniture Co., Ltd. Structure pour connecter éléments
EP1927301A1 (fr) * 2005-11-11 2008-06-04 Kokuyo Furniture Co., Ltd. Structure d'accrochage de ressort
US7416252B2 (en) * 2002-01-17 2008-08-26 Green Continental Furniture (M) Sdn Bhd Backpost unit of wooden dining chair with reclining mechanism
US7665805B2 (en) 2005-11-11 2010-02-23 Kokuyo Furniture Co., Ltd. Chair
US7717513B2 (en) 2005-11-11 2010-05-18 Kokuyo Furniture Co., Ltd. Chair
US7862120B2 (en) 2005-11-11 2011-01-04 Kokuyo Furniture Co., Ltd. Chair
US10966527B2 (en) 2017-06-09 2021-04-06 Steelcase Inc. Seating arrangement and method of construction
US11096497B2 (en) 2015-04-13 2021-08-24 Steelcase Inc. Seating arrangement
US11109683B2 (en) 2019-02-21 2021-09-07 Steelcase Inc. Body support assembly and method for the use and assembly thereof
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
US11324325B2 (en) 2015-04-13 2022-05-10 Steelcase Inc. Seating arrangement
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4529247A (en) * 1982-04-15 1985-07-16 Herman Miller, Inc. One-piece shell chair
EP0233974A1 (fr) * 1986-02-27 1987-09-02 Christof Stoll GmbH & Co KG Dispositif d'inclinaison pour sièges
DE3630503A1 (de) * 1986-09-08 1988-03-10 Girsberger Holding Ag Stuhl
DE3700862A1 (de) * 1987-01-14 1988-07-28 Vogt Bueromoebel Sitzmoebel
DE3743013A1 (de) * 1987-12-18 1989-06-29 Froescher August Gmbh Co Kg Sitz-rueckenlehnen-einheit fuer arbeitsstuhl

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4529247A (en) * 1982-04-15 1985-07-16 Herman Miller, Inc. One-piece shell chair
EP0233974A1 (fr) * 1986-02-27 1987-09-02 Christof Stoll GmbH & Co KG Dispositif d'inclinaison pour sièges
DE3630503A1 (de) * 1986-09-08 1988-03-10 Girsberger Holding Ag Stuhl
DE3700862A1 (de) * 1987-01-14 1988-07-28 Vogt Bueromoebel Sitzmoebel
DE3743013A1 (de) * 1987-12-18 1989-06-29 Froescher August Gmbh Co Kg Sitz-rueckenlehnen-einheit fuer arbeitsstuhl

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5704688A (en) * 1994-08-05 1998-01-06 Mauser Office Gmbh Chair
DE4427754A1 (de) * 1994-08-05 1996-02-15 Mauser Waldeck Ag Stuhl, insbesondere Drehstuhl
EP1118497A3 (fr) * 2000-01-15 2002-02-13 Volkswagen Aktiengesellschaft Siège de véhicule
US6739663B2 (en) * 2001-02-23 2004-05-25 Krueger International, Inc. Flexible bar-type back pivot mounting arrangement for a chair
US7416252B2 (en) * 2002-01-17 2008-08-26 Green Continental Furniture (M) Sdn Bhd Backpost unit of wooden dining chair with reclining mechanism
US7118177B2 (en) * 2004-01-26 2006-10-10 Pro-Cord Spa Chair with tiltable backrest
JP2007146866A (ja) * 2005-10-27 2007-06-14 Kokuyo Co Ltd 部材の接続構造
US7857389B2 (en) 2005-11-11 2010-12-28 Kokuyo Furniture Co., Ltd Structure for connecting members
EP1927301A1 (fr) * 2005-11-11 2008-06-04 Kokuyo Furniture Co., Ltd. Structure d'accrochage de ressort
US7665805B2 (en) 2005-11-11 2010-02-23 Kokuyo Furniture Co., Ltd. Chair
US7712833B2 (en) 2005-11-11 2010-05-11 Kokuyo Furniture Co., Ltd. Structure for connecting members
US7717513B2 (en) 2005-11-11 2010-05-18 Kokuyo Furniture Co., Ltd. Chair
EP1785068A1 (fr) * 2005-11-11 2007-05-16 Kokuyo Furniture Co., Ltd. Structure pour connecter éléments
US7862120B2 (en) 2005-11-11 2011-01-04 Kokuyo Furniture Co., Ltd. Chair
US11553797B2 (en) 2015-04-13 2023-01-17 Steelcase Inc. Seating arrangement
US11096497B2 (en) 2015-04-13 2021-08-24 Steelcase Inc. Seating arrangement
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
US11324325B2 (en) 2015-04-13 2022-05-10 Steelcase Inc. Seating arrangement
US11963621B2 (en) 2015-04-13 2024-04-23 Steelcase Inc. Seating arrangement
US10966527B2 (en) 2017-06-09 2021-04-06 Steelcase Inc. Seating arrangement and method of construction
US11825955B2 (en) 2017-06-09 2023-11-28 Steelcase Inc. Seating arrangement and method of construction
US11109683B2 (en) 2019-02-21 2021-09-07 Steelcase Inc. Body support assembly and method for the use and assembly thereof
US11602223B2 (en) 2019-02-21 2023-03-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11910934B2 (en) 2019-02-21 2024-02-27 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11786039B2 (en) 2019-12-13 2023-10-17 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11805913B2 (en) 2019-12-13 2023-11-07 Steelcase Inc. Body support assembly and methods for the use and assembly thereof

Also Published As

Publication number Publication date
EP0552388B1 (fr) 1993-09-08
ATE94038T1 (de) 1993-09-15
DE59200011D1 (de) 1993-10-14

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