EP0552388B1 - Dossier pour siège de bureau - Google Patents
Dossier pour siège de bureau Download PDFInfo
- Publication number
- EP0552388B1 EP0552388B1 EP92100807A EP92100807A EP0552388B1 EP 0552388 B1 EP0552388 B1 EP 0552388B1 EP 92100807 A EP92100807 A EP 92100807A EP 92100807 A EP92100807 A EP 92100807A EP 0552388 B1 EP0552388 B1 EP 0552388B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- backrest
- lumbar
- shoulder part
- shoulder
- 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.)
- Expired - Lifetime
Links
Images
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
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- 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, the articulated connections being arranged on the two outer sides of the backrest, and the shoulder part being provided in the articulated connection Spring elements is held in the front position when not in use.
- 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 lug via two articulated axes lying one above the other.
- the aim of this is to ensure that in the area of the user's lumbar spine, the upper part of the backrest does not move sharply over an axis when leaning back, but rather softly and largely without kinks to the rear.
- 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.
- 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 preloaded 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 back consisting of a lower lumbar part 1 and an upper shoulder part 2, which is connected via a synchronous mechanism 11 to the seat 10 and the column 12 of an office chair.
- the synchronous mechanism 11 is preferably designed as in EP-A-0 233 974.
- 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 inherent 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 rigid 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 rear side of the brackets 5, 6 in such a way 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 that 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
- Chairs Characterized By Structure (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
- Finger-Pressure Massage (AREA)
Claims (8)
- Dossier de chaise de bureau avec une coque, constituée d'une partie inférieure lombaire (1) et d'une partie supérieure (2) pour les épaules, assemblées l'une à l'autre de manière articulée, les assemblages articulés étant disposés aux deux côtés externes du dossier, et la partie pour les épaules (2) étant maintenue dans la position avancée par des éléments élastiques prévus dans l'assemblage articulé, à l'état non utilisé, caractérisé en ce que la partie pour les épaules (2) et la partie lombaire (1) sont assemblées l'une à l'autre par des bandes élastiques (3, 4) situées aux deux côtés externes de la coque de dossier, et en ce qu'il est prévu, pour le guidage du mouvement de la partie pour les épaules (2) par rapport à la partie lombaire (1), une armature (5, 6) de forme frontale convexe située près de chaque bande (3, 4), qui est assemblée de manière mobile à la partie lombaire (1) et à la partie pour les épaules (2), et dont la partie arrière concave est conçue, disposée et maintenue de telle sorte sur les faces correspondantes de la partie arrière de la partie lombaire (1) respectivement de la partie pour les épaules (2), que ces faces ne peuvent se déplacer, à la partie arrière de l'armature, qu'entre deux positions de butée, et que chaque armature (5, 6) est soumise à la force d'éléments élastiques (7, 8), de sorte que la partie pour les épaules (2) demeure en position avancée à l'état non utilisé.
- Dossier selon la revendication 1, caractérisé en ce que la partie lombaire (1) est fixée à un support de dossier (9), qui est commun à la partie siège (1) d'un mécanisme synchrone.
- Dossier selon la revendication 1, caractérisé en ce que les éléments élastiques (7, 8) au moyen desquels les armatures (5, 6) sont maintenues à la partie lombaire (1) respectivement à la partie pour les épaules (2), sont également précontraints à l'état non utilisé du dossier.
- Dossier selon la revendication 3, caractérisé en ce que les éléments élastiques (7, 8) sont des corps ayant des caractéristiques élastiques, de préférence des corps cylindriques en plastique élastique.
- Dossier selon la revendication 4, caractérisé en ce que les éléments élastiques (7, 8) sont constitués de polyuréthane (PUR).
- Dossier selon la revendication 1, caractérisé en ce qu'il s'agit d'une coque en plastique en une seule pièce, qui est découpée dans le domaine de l'assemblage articulé, de manière à avoir une fente (13) à extension horizontale s'étendant sur la partie médiane, et qui est limitée sur ses côtés par les bandes élastiques (3, 4).
- Dossier selon la revendication 6, caractérisé en ce qu'il s'agit d'une coque en polypropylène (PP) de type unique.
- Dossier selon la revendication 1, caractérisé en ce que les armatures (5, 6) sont constituées d'aluminium, de magnésium ou de plastique renforcé de fibres de verre de rigidité correspondante.
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 EP0552388A1 (fr) | 1993-07-28 |
EP0552388B1 true 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) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4427754C2 (de) * | 1994-08-05 | 1997-09-11 | Mauser Office Gmbh | Stuhl, insbesondere Drehstuhl |
DE10001445B4 (de) * | 2000-01-15 | 2007-12-27 | Volkswagen Ag | Sitzplatte für einen Fahrzeugsitz |
WO2002069762A2 (fr) * | 2001-02-23 | 2002-09-12 | Krueger International, Inc. | Systeme de montage en pivot flexible de dossier, du type barre, pour une chaise |
MY134768A (en) * | 2002-01-17 | 2007-12-31 | Green Continental Furniture M Sdn Bhd | A dining chair with reclining mechanism |
DE602004004359T2 (de) * | 2004-01-26 | 2007-08-23 | Pro-Cord S.P.A. | Stuhl mit kippbarer Rückenlehne |
JP4719905B2 (ja) | 2005-10-27 | 2011-07-06 | コクヨ株式会社 | 椅子 |
JP5002835B2 (ja) | 2005-10-27 | 2012-08-15 | コクヨ株式会社 | 部材の接続構造 |
JP4945781B2 (ja) | 2005-11-11 | 2012-06-06 | コクヨ株式会社 | 椅子 |
JP4747311B2 (ja) | 2005-11-11 | 2011-08-17 | コクヨ株式会社 | 椅子 |
JP4614088B2 (ja) * | 2005-11-11 | 2011-01-19 | コクヨ株式会社 | バネの取付構造 |
US10194750B2 (en) | 2015-04-13 | 2019-02-05 | Steelcase Inc. | Seating arrangement |
US11259637B2 (en) | 2015-04-13 | 2022-03-01 | Steelcase Inc. | Seating arrangement |
BR112017022038B1 (pt) | 2015-04-13 | 2021-11-03 | Steelcase Inc. | Disposição de assento |
US10966527B2 (en) | 2017-06-09 | 2021-04-06 | Steelcase Inc. | Seating arrangement and method of construction |
EP3927215A4 (fr) | 2019-02-21 | 2023-03-15 | Steelcase Inc. | Ensemble support corporel et procédés d'utilisation et d'assemblage de cet ensemble |
US11357329B2 (en) | 2019-12-13 | 2022-06-14 | Steelcase Inc. | Body support assembly and methods for the use and assembly thereof |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4529247A (en) * | 1982-04-15 | 1985-07-16 | Herman Miller, Inc. | One-piece shell chair |
ATE47016T1 (de) * | 1986-02-27 | 1989-10-15 | Stoll Kg Christof | Neigungsvorrichtung fuer sitzmoebel. |
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 |
-
1992
- 1992-01-20 DE DE92100807T patent/DE59200011D1/de not_active Expired - Fee Related
- 1992-01-20 EP EP92100807A patent/EP0552388B1/fr not_active Expired - Lifetime
- 1992-01-20 AT AT92100807T patent/ATE94038T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ATE94038T1 (de) | 1993-09-15 |
EP0552388A1 (fr) | 1993-07-28 |
DE59200011D1 (de) | 1993-10-14 |
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