EP0552388B1 - Backrest for an office chair - Google Patents
Backrest for an office chair 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
-
- 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)
- Finger-Pressure Massage (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
Abstract
Description
Die Erfindung bezieht sich auf das Gebiet der Bürositzmöbel.The invention relates to the field of office seating.
Sie betrifft eine Rückenlehne für einen Bürostuhl, welche als aus einem unteren Lumbalteil und einem oberen Schulterteil bestehende Schale ausgebildet ist, wobei diese beiden Teile gelenkig miteinander verbunden sind, die Gelenkverbindungen an den beiden Außenseiten der Lehne angeordnet sind und der Schulterteil mittels in der Gelenkverbindung vorgesehener Federelemente im unbenutzten Zustand in der vorderen Position gehalten wird.It relates to 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.
Eine solche Rükenlehne ist z.B. aus der DE-A-3743013 bekannt. Diese Schrift beschreibt eine horizontal geteilte Rückenlehne für einen Bürostuhl, wobei die beiden Teile im Bereich des Lendenbausches mittels einer Gelenk-Lasche über zwei übereinander liegende Gelenkachsen miteinander verbunden sind. Dadurch soll erreicht werden, dass im Bereich der Lendenwirbelsäule des Benutzers der obere Teil der Lehne sich beim Zurücklehnen nicht scharf über eine Achse, sondern eher weich und weitgehend knickfrei nach hinten bewegt. Zusammen mit einer geeignet gestalteten Polsterung soll dadurch die Abbiegung der Lehne nach einer der natürlichen Wölbung der Wirbelsäule entsprechenden Biegelinie verlaufen und eine ständig gleichmässige Rückenabstützung bewirken.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. Together with a suitably designed upholstery, the backrest should bend according to a bend line that corresponds to the natural curvature of the spine and provide a constant back support.
Aus der DE-A 3630503 ist eine Sitz-Lehnenkonstruktion für einen Bürostuhl bekannt, bei welcher die Lehnenschale in einen unteren Becken- oder Lumbal- und einen oberen Schulterteil geteilt ist, und diese beiden Teile an den Aussenseiten über Gelenke miteinander verbunden sind. Die beiden Rückenschalenteile sind aus einer Anschlagstellung gegen eine Federabstützung relativ zueinander verschwenkbar. Dadurch soll eine sonst übliche, über die Rückseite vorstehende Rückenstütze vermieden, und eine schmale Seitensilhouette erreicht werden.From DE-A 3630503 a seat-back construction for an office chair is known, 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.
Aus der EP-A-0277912 ist ein Bürostuhl mit geteilter Rückenlehne bekannt, deren übereinander angeordnete Segmente durch zwei im Abstand voneinander angeordnete Federgelenke miteinander verbunden sind. Die Federgelenke bestehen aus federnden Rundstäben. Dadurch sollen Scharniere mit separaten Federn vermieden werden, welche - an den Aussenseiten der Lehne angebracht - wegen der Wölbung der Lehne konstruktive Probleme ergeben, und - in der Mitte der Lehne angebracht - Schwierigkeiten in bezug auf die Stabilität der Lehne bewirken.From EP-A-0277912 an office chair with a split backrest is known, the superimposed segments of which 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 because of the curvature of the backrest, and - attached in the middle of the backrest - cause difficulties with regard to the stability of the backrest.
Aus der WO-A 90/02503 ist ein Stuhl mit zwei an den Aussenseiten des Sitzes nach oben gerichteten Trägern für die Rückenlehne bekannt, welche im unteren Teil über ein Federgelenk miteinander verbunden sind. Die Lehne weist keinen den Benutzer im Lendenwirbelsäulenbereich stützenden Lumbalteil auf, und die Federgelenke wirken sich im wesentlichen nur auf die Beweglichkeit der Schulterstütze aus.From WO-A 90/02503 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.
Alle diese bekannten Rückenlehnen haben den Nachteil, dass die Wölbung der Lehne sich der im zurückgelehnten Zustand veränderten Form der Wirbelsäule des Benutzers nur sehr unvollkommen anpasst, und sie obendrein noch recht komplexe mechanische Konstruktionen aufweisen, die aufwendig in der Produktion und damit auch teuer im Verkauf sind.All these known backrests have the disadvantage that the curvature of the backrest adapts only very imperfectly to the shape of the spine of the user that has been reclined, and on top of that they still have quite complex mechanical constructions, which are complex to produce and thus expensive to sell are.
Es ist daher die Aufgabe der Erfindung, eine Rückenlehne für einen Bürostuhl so zu gestalten, dass sie sich einerseits zwar der sich ändernden Form der Wirbelsäule eines sich zurücklehnenden Benutzers insbesondere im Lubamlbereich möglichst optimal anpasst, andererseits aber konstruktiv möglichst einfach und damit in der Produktion möglichst kostengünstig ist.It is therefore the object of the invention to design a backrest for an office chair in such a way that, on the one hand, it adapts as optimally as possible to the changing shape of the spine of a reclining user, in particular in the lubam area, but on the other hand it is structurally simple and thus possible in production is inexpensive.
Die Aufgabe wird durch die im Anspruch 1 angegebenen Merkmale gelöst. Weitere Merkmale der Erfindung sind Gegenstand der abhängigen Ansprüche 2 bis 8.The object is achieved by the features specified in
Der Kern der Erfindung besteht darin, dass Lumbal- und Schulterteil der Lehne nicht über ein punktförmiges Scharnier-Gelenk miteinander verbunden sind, sondern stattdessen über die Biegezone der verbindenden elastischen Bänder. Die Biegelinie dieser Bänder entspricht in optimaler Weise der Verformung der Wirbelsäule des Benutzers beim Zurücklehnen im Lumbalbereich. In Kombination mit diesen Bändern bewirken die Aluminium-Bügel, dass Lumbal- und Schulterteil sich nur zwischen zwei wohldefinierten Anschlagpositionen bewegen können. Die vorgespannten Federelemente bewirken, dass der Schulterteil sich erst ab einem grösseren Druck zu bewegen beginnt. Die sich aus der Erfindung ergebende Konstruktion ist ausserordentlich einfach und umfasst nur wenige Teile. Sie ist damit in der Produktion sehr kostengünstig.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. In combination with these straps, 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.
Die Erfindung wird nachfolgend anhand eines in Zeichnungen dargestellten Ausführungsbeispiels näher erläutert. Dabei zeigt
- Fig. 1
- schematisch die Seitenansicht eines Bürostuhls, bei welchem Sitz und Lehne über eine Synchronmechanik an der Standsäule gehaltert sind, und die Lehne gemäss der Erfindung zweigeteilt ist,
- Fig. 2
- die Ansicht einer Lehnenschale nach der Erfindung von hinten, und
- Fig. 3
- im Detail Ausbildung und Lagerung des Bügels am Lumbal- und Schulterteil der Lehne.
- Fig. 1
- schematically the side view of an office chair, in which the seat and backrest are held by a synchronous mechanism on the pillar, and the backrest is divided in two according to the invention,
- Fig. 2
- the view of a backrest shell according to the invention from behind, and
- Fig. 3
- detailed design and storage of the bracket on the lumbar and shoulder part of the backrest.
In Fig.1 ist schematisch eine aus einem unteren Lumbalteil 1 und einem oberen Schulterteil 2 bestehende Lehne dargestellt, die über eine Synchronmechanik 11 mit dem Sitz 10 und der Standsäule 12 eines Bürostuhls verbunden ist. Die Synchronmechanik 11 ist vorzugsweise ausgebildet wie in EP-A-0 233 974.1 schematically shows a back consisting of a
Wie auch aus Fig.2 ersichtlich, ist der Lumbalteil 1 am Lehnenträger 9 befestigt, und bewegt sich nach hinten/unten, wenn der Sitz 10 abgesenkt wird.As can also be seen from FIG. 2, the
Aus Fig.2 ist auch ersichtlich, dass die Rückenlehne aus einer einstückigen selbsttragenden Schale aus einem Werkstoff mit einer gewissen Eigenelastizität, vorzugsweise aus Polypropylen-Kunststoff, besteht, die im unteren Bereich einen sich horizontal erstreckenden Schlitz 13 aufweist, der aussen durch senkrechte kurze Schlitze abgeschlossen ist. Dadurch entstehen in sehr einfacher Weise der untere Lumbalteil 1 und der obere Schulterteil 2, die über von den elastischen Bändern 3,4 hergestellte Biegezonen gelenkig miteinander verbunden sind.From Fig. 2 it can also be seen that 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
Die Führung der Relativbewegung des Schulterteils 2 gegenüber dem Lumbalteil 1 wird durch die Bügelkonstruktion bewirkt, die in Fig.1 und näher in Fig.3 dargestellt ist:The guidance of the relative movement of the
Die aus Aluminium-Druckguss bestehenden, konvexen Bügel 5 bzw. 6 sind am Lumbalteil 1 mittels eines Scharniers 14 bzw. 15 befestigt. An ihren Enden weisen sie Nasen auf. In diesen Nasen sind auf Druck wirkende Federn, vorzugsweise zylinderförmige PUR-Kunststoffedern 7,8 eingesetzt, die durch auf den Lumbalteil 1 bzw. Schulterteil 2 festgeschraubte Deckel 16 unter Vorspannung gesetzt und festgehalten werden. Die Bügel 5,6 können mit Vorteil auch aus Magnesium oder entsprechend steifem glasfaserverstärkten Kunststoff bestehen. Statt der Kunststoffedern könnten prinzipiell auch Stahlfedern verwendet werden.The
Lumbalteil 1 und Schulterteil 2 liegen auf der konkaven Rückseite der Bügel 5, 6 derart auf, dass der Schulterteil 2 im unbenutzten Zustand von den Federelementen 7, 8 in die vorderen Anschlagpositionen gedrückt wird. Wird jedoch vom Benutzer eine Kraft auf den Schulterteil 2 ausgeübt, so bewegen sich die entsprechenden Flächen des Lumbalteils 1 und des Schulterteils 2 gegen die Federkräfte in die anderen Anschlagpositionen.Lumbar
Die aus den elastischen Bändern 3, 4 zusammen mit den Bügeln 5, 6 bestehende Gelenkverbindung spricht weich aber definiert an, und arbeitet nicht nur sagittal, sondern auch tordierend. Letzteres ist ein nicht ohne weiteres vorhersehbarer, für den Benutzer sehr günstiger Effekt. Der Bewegungsablauf wird durch definierte Anfangs- und Endkräfte bestimmt. Die tordierende Bewegungsmöglichkeit ist durch die vorgespannten Federelemente gezielt eingeschränkt, um Unsicherheitsgefühle, die beim Benutzer durch die insgesamt elastischere Lehne entstehen können, auszuschliessen. Der Bewegungsspielraum des Schulterteils 2 der Lehne wird bewusst beendet, wenn die beiden Bügel 5,6 an dem benachbarten Lumbal- und Schulterteil der Lehne anliegen, wodurch eine durchgehend steife Lehne entsteht.The articulated connection consisting of the
Die gesamte Konstruktion umfasst ausser den beiden Bügeln 5, 6 nur noch die Federdeckel 16 und nicht gezeichnete Bolzen zur Befestigung der Bügel 5, 6 in den Scharnieren 14, 15 als Einzelteile. Produktion und Montage sind demnach extrem einfach und damit kostengünstig.In addition to the two
Claims (8)
- Backrest for an office chair having a shell comprising a lower lumbar part (1) and an upper shoulder part (2) which are connected in an articulated manner to each other, the articulated connections being arranged on the two outer sides of the backrest and the shoulder part (2) being held, by means of spring elements provided in the articulated connection, in the forwards position when not in use, characterised in that the shoulder part (2) and the lumbar part (1) are connected to each other via flexible strips (3, 4) located on the two outer sides of the backrest shell and, for guiding the movement of the shoulder part (2) in relation to the lumbar part (1), in each case one link (5, 6) is provided which is located in the vicinity of a strip (3, 4), is convex in shape as seen from the front, is movably connected to the lumbar part (1) and the shoulder part (2), and the concave rear side of which is designed in such a manner, and arranged and secured on the corresponding surfaces of the rear side of the lumbar part (1) and the shoulder part (2) in such a manner, that said surfaces can move on the rear side of the link only between two stop positions, and the link (5, 6) is in each case subjected to the force of spring elements (7, 8) at its securing means on the lumbar part (1) and the shoulder part (2) in such a manner that the shoulder part (2) is in the forwards position when not in use.
- Backrest according to Claim 1, characterised in that the lumbar part (1) is fastened on a backrest-bearing means (9) which, together with the seat (10), is part of a synchronising mechanism.
- Backrest according to Claim 1, characterised in that the spring elements (7, 8) by means of which the links (5, 6) are held on the lumbar part (1) and the shoulder part (2) are also subjected to prestress when the backrest is not in use.
- Backrest according to Claim 3, characterised in that the spring elements (7, 8) are bodies having resilient properties, preferably cylindrical bodies consisting of flexible plastic.
- Backrest according to Claim 4, characterised in that the spring elements (7, 8) consist of polyurethane (PUR).
- Backrest according to Claim 1, characterised in that it is a single-piece plastic shell which is cut out in the region of the articulated connection in such a manner that a slot (13) is obtained which extends over the central part, runs horizontally and is delimited on the outside by the flexible strips (3, 4).
- Backrest according to Claim 6, characterised in that it is a shell consisting of single-material polypropylene (PP).
- Backrest according to Claim 1, characterised in that the links (5, 6) consist of aluminium, magnesium or a correspondingly rigid, glass-fibre-reinforced plastic.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT92100807T ATE94038T1 (en) | 1992-01-20 | 1992-01-20 | BACK FOR AN OFFICE CHAIR. |
| DE92100807T DE59200011D1 (en) | 1992-01-20 | 1992-01-20 | Backrest for an office chair. |
| EP92100807A EP0552388B1 (en) | 1992-01-20 | 1992-01-20 | Backrest for an office chair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP92100807A EP0552388B1 (en) | 1992-01-20 | 1992-01-20 | Backrest for an office chair |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0552388A1 EP0552388A1 (en) | 1993-07-28 |
| EP0552388B1 true EP0552388B1 (en) | 1993-09-08 |
Family
ID=8209255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92100807A Expired - Lifetime EP0552388B1 (en) | 1992-01-20 | 1992-01-20 | Backrest for an office chair |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0552388B1 (en) |
| AT (1) | ATE94038T1 (en) |
| DE (1) | DE59200011D1 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4427754C2 (en) * | 1994-08-05 | 1997-09-11 | Mauser Office Gmbh | Chair, especially swivel chair |
| DE10001445B4 (en) * | 2000-01-15 | 2007-12-27 | Volkswagen Ag | Seat plate for a vehicle seat |
| US6739663B2 (en) * | 2001-02-23 | 2004-05-25 | Krueger International, Inc. | Flexible bar-type back pivot mounting arrangement for a chair |
| MY134768A (en) * | 2002-01-17 | 2007-12-31 | Green Continental Furniture M Sdn Bhd | A dining chair with reclining mechanism |
| EP1557115B1 (en) * | 2004-01-26 | 2007-01-17 | Pro-Cord S.P.A. | Chair with tiltable backrest |
| JP5002835B2 (en) | 2005-10-27 | 2012-08-15 | コクヨ株式会社 | Member connection structure |
| JP4719905B2 (en) | 2005-10-27 | 2011-07-06 | コクヨ株式会社 | Chair |
| JP4747311B2 (en) | 2005-11-11 | 2011-08-17 | コクヨ株式会社 | Chair |
| JP4721183B2 (en) * | 2005-11-11 | 2011-07-13 | コクヨ株式会社 | Spring mounting structure |
| JP4945781B2 (en) | 2005-11-11 | 2012-06-06 | コクヨ株式会社 | Chair |
| US10194750B2 (en) | 2015-04-13 | 2019-02-05 | Steelcase Inc. | Seating arrangement |
| 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 |
| CA2981528A1 (en) | 2015-04-13 | 2016-10-20 | Steelcase Inc. | Seating arrangement |
| AU2020224628A1 (en) | 2019-02-21 | 2021-08-26 | 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 |
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 |
| EP0233974B1 (en) * | 1986-02-27 | 1989-10-11 | Christof Stoll GmbH & Co KG | Tilting device for sitting-furniture |
| DE3630503A1 (en) * | 1986-09-08 | 1988-03-10 | Girsberger Holding Ag | CHAIR |
| DE3700862A1 (en) * | 1987-01-14 | 1988-07-28 | Vogt Bueromoebel | Seating furniture |
| DE3743013A1 (en) * | 1987-12-18 | 1989-06-29 | Froescher August Gmbh Co Kg | Seat-backrest unit for work chair |
-
1992
- 1992-01-20 EP EP92100807A patent/EP0552388B1/en not_active Expired - Lifetime
- 1992-01-20 AT AT92100807T patent/ATE94038T1/en not_active IP Right Cessation
- 1992-01-20 DE DE92100807T patent/DE59200011D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0552388A1 (en) | 1993-07-28 |
| ATE94038T1 (en) | 1993-09-15 |
| DE59200011D1 (en) | 1993-10-14 |
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