EP0552388A1 - Backrest for an office chair - Google Patents

Backrest for an office chair Download PDF

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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)
French (fr)
Other versions
EP0552388B1 (en
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 EP92100807A priority Critical patent/EP0552388B1/en
Priority to AT92100807T priority patent/ATE94038T1/en
Priority to DE92100807T priority patent/DE59200011D1/en
Publication of EP0552388A1 publication Critical patent/EP0552388A1/en
Application granted granted Critical
Publication of EP0552388B1 publication Critical patent/EP0552388B1/en
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)
  • Finger-Pressure Massage (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Abstract

A backrest consists of a lumbar part (1) and a shoulder part (2), which parts are connected to one another via elastic bands (3, 4). The guiding of the relative movement of the shoulder part (2) relative to the lumbar part (1) is effected by convex bars (4, 5) which are mounted movably on the lumbar part (1) and on the shoulder part (2) at their nose-like ends by means of prestressed spring elements (7, 8). The lumbar part (1) and the shoulder part (2) move on the concave rear side of the bars between two well-defined stop positions. <IMAGE>

Description

Die Erfindung bezieht sich auf das Gebiet der Bürositzmöbel.The invention relates to the field of office seating.

Sie betrifft insbesondere 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, und der Schulterteil mittels in der Gelenkverbindung vorgesehener Federelemente im unbenutzten Zustand in der vorderen Position gehalten wird.It relates in particular 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, 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.

STAND DER TECHNIKSTATE OF THE ART

Eine solche Rückenlehne 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 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. 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-B 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.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.

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.

DARSTELLUNG DER ERFINDUNGPRESENTATION OF THE INVENTION

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.The object is achieved by the features specified in claim 1.

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 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.

KURZE BESCHREIBUNG DER ZEICHNUNGENBRIEF DESCRIPTION OF THE DRAWINGS

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.
The invention is explained in more detail below with reference to an embodiment shown in the drawings. It shows
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 temple on the lumbar and shoulder part of the backrest.

WEG ZUR AUSFUEHRUNG DER ERFINDUNGWAY OF CARRYING OUT THE INVENTION

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 86102522.9.1 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.

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 lumbar part 1 is fastened to the backrest support 9 and moves back / down when the seat 10 is lowered.

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 Figure 2 it can also be seen that 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. This results in a very simple manner in the lower lumbar part 1 and the upper shoulder part 2, which are connected to one another in an articulated manner via bending zones 3, 4 produced by the elastic bands.

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 shoulder part 2 with respect to the lumbar part 1 is brought about by the bracket construction which is shown in FIG. 1 and in more detail in FIG. 3:

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 vrwendet werden.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. In these noses 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.

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 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.

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 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.

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 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.

BEZUGSZEICHENLISTEREFERENCE SIGN LIST

11
LumbalteilLumbar part
22nd
SchulterteilShoulder part
33rd
Linkes BandLeft band
44th
Rechtes BandRight band
55
Linker BügelLeft bracket
66
Rechter BügelRight bracket
77
Federelement am LumbalteilSpring element on the lumbar part
88th
Federelement am SchulterteilSpring element on the shoulder part
99
LehnenträgerBackrest support
1010th
SitzSeat
1111
SynchronmechanikSynchronous mechanism
1212
StandsäulePedestal
1313
Schlitzslot
1414
Linkes ScharnierLeft hinge
1515
Rechtes ScharnierRight hinge
1616
FederdeckelSpring cover

Claims (8)

Rückenlehne für einen Bürostuhl mit einer Schale, die aus einem unteren Lumbalteil (1) und einem oberen Schulterteil (2) besteht, welche gelenkig miteinander verbunden sind, wobei die Gelenkverbindungen an den beiden Aussenseiten der Lehne angeordnet sind, und der Schulterteil (2) mittels in der Gelenkverbindung vorgesehener Federelemente im unbenutzten Zustand in der vorderen Position gehalten wird, dadurch gekennzeichnet, dass der Schulterteil (2) und der Lumbalteil (1) über an den beiden Aussenseiten der Lehnenschale liegende elastische Bänder (3,4) miteinander verbunden sind, und für die Führung der Bewegung des Schulterteils (2) in bezug auf den Lumbalteil (1) jeweils ein bei einem Band (3, 4) liegender, von vorn gesehen konvex geformter Bügel (5,6) vorgesehen ist, der mit dem Lumbalteil (1) und dem Schulterteil (2) beweglich verbunden ist, und dessen konkave Rückseite derart ausgebildet und auf den entsprechenden Flächen der Rückseite des Lumbalteils (1) bzw. Schulterteils (2) derart angeordnet und gehaltert ist, dass sich diese Flächen auf der Rückseite des Bügels nur zwischen zwei Anschlagspositionen bewegen können, und der Bügel (5,6) jeweils an seinen Halterungen am Lumbalteil (1) bzw. Schulterteil (2) derart unter die Kraft von Federelementen (7,8) gesetzt ist, dass der Schulterteil (2) im unbenutzten Zustand in der vorderen Position steht.Backrest for an office chair with a shell consisting of a lower lumbar part (1) and an upper shoulder part (2), which are articulated to one another, the articulated connections being arranged on the two outer sides of the backrest, and the shoulder part (2) by means of spring elements provided in the articulated connection are held in the front position when not in use, characterized in that the shoulder part (2) and the lumbar part (1) are connected to one another via elastic bands (3, 4) lying on the two outer sides of the backrest shell, and For guiding the movement of the shoulder part (2) with respect to the lumbar part (1), a strap (5, 6) which is convex in shape when viewed from the front and which is connected to the lumbar part (1 ) and the shoulder part (2) is movably connected, and its concave rear side is formed in such a way and on the corresponding surfaces of the rear side of the lumbar part (1) or shoulder Rush (2) is arranged and held in such a way that these surfaces on the back of the bracket can only move between two stop positions, and the bracket (5, 6) in each case on its holders on the lumbar part (1) or shoulder part (2) in this way is under the force of spring elements (7,8) that the shoulder part (2) is in the unused state in the front position. Rückenlehne nach Anspruch 1, dadurch gekennzeichnet, dass der Lumbalteil (1) an einem Lehnenträger (9) befestigt ist, der gemeinsam mit dem Sitz (10) Teil einer Synchronmechanik ist.Backrest according to claim 1, characterized in that the lumbar part (1) is fastened to a backrest support (9) which, together with the seat (10), is part of a synchronous mechanism. Rückenlehne nach Anspruch 1,dadurch gekennzeichnet, dass die Federelemente (7,8), mittels welcher die Bügel (5,6) am Lumbalteil (1) bzw. Schulterteil (2) gehalten sind, auch im unbenutzten Zustand der Lehne unter Vorspannung stehen.Backrest according to claim 1, characterized in that the spring elements (7, 8), by means of which the brackets (5, 6) are held on the lumbar part (1) or shoulder part (2), are also pretensioned when the backrest is not in use. Rückenlehne nach Anspruch 3, dadurch gekennzeichnet, dass die Federelemente (7,8) Körper mit federnden Eigenschaften, vorzugsweise zylindrische Körper aus elastischem Kunststoff sind.Backrest according to claim 3, characterized in that the spring elements (7, 8) are bodies with resilient properties, preferably cylindrical bodies made of elastic plastic. Rückenlehne nach Anspruch 4, dadurch gekennzeichnet, dass die Federelemente (7,8) aus Poly-Urethan-(PUR) bestehen.Backrest according to claim 4, characterized in that the spring elements (7,8) consist of poly urethane (PUR). Rückenlehne nach Anspruch 1, dadurch gekennzeichnet, dass sie eine einstückige Kunststoff-Schale ist, die im Bereich der Gelenkverbindung derart ausgeschnitten ist, dass sich ein über den Mittelteil erstreckender, horizontal verlaufender Schlitz (13) ergibt, der aussen von den elastischen Bändern (3,4) begrenzt ist.Backrest according to Claim 1, characterized in that it is a one-piece plastic shell which is cut out in the region of the articulated connection in such a way that a horizontally extending slot (13) extends over the central part and extends outside of the elastic bands (3 , 4) is limited. Rückenlehne nach Anspruch 6, dadurch gekennzeichnet, dass sie eine Schale aus sortenreinem Polypropylen (PP) ist.Backrest according to claim 6, characterized in that it is a shell made of pure polypropylene (PP). Rückenlehne nach Anspruch 1, dadurch gekennzeichnet, dass die Bügel (5,6) aus Aluminium, Magnesium oder entsprechend steifem glasfaserverstärktem Kunststoff bestehen.Backrest according to claim 1, characterized in that the brackets (5, 6) consist of aluminum, magnesium or correspondingly stiff glass fiber reinforced plastic.
EP92100807A 1992-01-20 1992-01-20 Backrest for an office chair Expired - Lifetime EP0552388B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP92100807A EP0552388B1 (en) 1992-01-20 1992-01-20 Backrest for an office chair
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.

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 true EP0552388A1 (en) 1993-07-28
EP0552388B1 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)

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DE4427754A1 (en) * 1994-08-05 1996-02-15 Mauser Waldeck Ag Swivel office chair
EP1118497A3 (en) * 2000-01-15 2002-02-13 Volkswagen Aktiengesellschaft Vehicle seat
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 (en) * 2005-11-11 2007-05-16 Kokuyo Furniture Co., Ltd. Structure for connecting members
EP1927301A1 (en) * 2005-11-11 2008-06-04 Kokuyo Furniture Co., Ltd. Structure for attaching spring
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

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Publication number Priority date Publication date Assignee Title
US5704688A (en) * 1994-08-05 1998-01-06 Mauser Office Gmbh Chair
DE4427754A1 (en) * 1994-08-05 1996-02-15 Mauser Waldeck Ag Swivel office chair
EP1118497A3 (en) * 2000-01-15 2002-02-13 Volkswagen Aktiengesellschaft Vehicle seat
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 (en) * 2005-10-27 2007-06-14 Kokuyo Co Ltd Connection structure of members
US7857389B2 (en) 2005-11-11 2010-12-28 Kokuyo Furniture Co., Ltd Structure for connecting members
EP1927301A1 (en) * 2005-11-11 2008-06-04 Kokuyo Furniture Co., Ltd. Structure for attaching spring
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 (en) * 2005-11-11 2007-05-16 Kokuyo Furniture Co., Ltd. Structure for connecting members
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
DE59200011D1 (en) 1993-10-14
ATE94038T1 (en) 1993-09-15
EP0552388B1 (en) 1993-09-08

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