EP0397661A1 - Chair, in particular work or office chair. - Google Patents

Chair, in particular work or office chair.

Info

Publication number
EP0397661A1
EP0397661A1 EP88909998A EP88909998A EP0397661A1 EP 0397661 A1 EP0397661 A1 EP 0397661A1 EP 88909998 A EP88909998 A EP 88909998A EP 88909998 A EP88909998 A EP 88909998A EP 0397661 A1 EP0397661 A1 EP 0397661A1
Authority
EP
European Patent Office
Prior art keywords
backrest
slide
seat
bar
spring
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
EP88909998A
Other languages
German (de)
French (fr)
Other versions
EP0397661B1 (en
Inventor
Siegfried Keusch
Guenter Kratz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Haworth Buroeinrichtungen GmbH
Original Assignee
Roeder GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Roeder GmbH filed Critical Roeder GmbH
Priority to AT88909998T priority Critical patent/ATE77217T1/en
Publication of EP0397661A1 publication Critical patent/EP0397661A1/en
Application granted granted Critical
Publication of EP0397661B1 publication Critical patent/EP0397661B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • A47C1/03238—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
    • 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

Definitions

  • e invention relates to a chair, in particular work or
  • Office chair with a backrest bar that can be changed in inclination relative to the seat and one attached to it
  • Tilting the back of the backrest bar in or on the backrest bar is slidable towards the seat.
  • the known chairs of this type offer excellent seating comfort, since on the one hand they provide a clear support for the back of the user in the starting or working position thanks to the practically vertical position of the backrest, but on the other hand they enable relaxed sitting after the backrest bar has been tilted backwards.
  • the backrest bar tilts backwards the user's upper body does not simply make a swiveling movement, but rather there is a movement superimposed on different movement components. Since the backrest executes an additional downward movement towards the seat when the backrest bar is tilted backwards, a relative movement between the back of the user and the backrest is avoided or at least reduced to an undetectable value.
  • the backrest is connected to a slide or the like, which is additionally adjustable in or on the scanner or the like via a predetermined adjustment path and can be fixed in * several positions.
  • the backrest with the slide or the like can be achieved via a separate adjustment path without influencing the adjustment path of the slide or the like, which is carried out automatically via the adjusting device a basic setting can be brought that is adapted to the height of the user.
  • the anatomical design of the backrest therefore comes into full effect for every user regardless of their body size and with a relatively small additional effort.
  • the setting of the slide or the like in several, defined positions via its adjustment path in or on the slide or the like is achieved in a simple manner by that a spring with Rastbolze ⁇ is attached to the carriage or the like, which can be snapped into one of several bores of the slide or the like, and that by means of a button which is arranged in the backrest rod, the spring can be deflected and since it is the latching connection between the Locking pin and the slide or the like. Can be canceled.
  • the locking position between the locking pin and the slider or the like After releasing the button, the locking position between the locking pin and the slider or the like. Then sets itself automatically if it is provided that the button is supported by an elastic element as a return spring on the slider or the like the highest position of the backrest and thus the carriage or the like.
  • a particularly advantageous embodiment is characterized in that the spring is designed as a U-shaped leaf spring, which laterally encloses the carriage or the like with its side legs and with its transverse leg on the side of the carriage or the like facing the seat Backrest facing side of the slide or the like. Is supported, and that the button on the side facing away from the backrest of the backrest bar is arranged outside the adjustment path of the backrest. The button is then always easily accessible and the spring with the locking pin st can easily be accommodated in the backrest bar.
  • the locking force is transferred symmetrically and uniformly to the locking pin if the configuration is made such that the locking pin is attached centrally to the cross leg of the spring and protrudes toward the slide or the like. This and that the series of holes in the slide or the like. are brought in at regular intervals.
  • the adjusting device for the slide or the like is preferably designed in such a way that the adjusting device has only a single toggle lever which is pivotably mounted about a horizontal pivot axis on a bearing bracket which supports the seat or on a seat bracket which can be changed in inclination on the bearing bracket, so that an extension the backrest is articulated to the end of the lever arm of the toggle lever, and that the end of the other lever arm of the toggle lever is pivotable by means of a bolt or the like / or the lowering of the seat support one lever arm of the knee lever the extension and thus the backrest in the direction of the bearing block or seat support understand it.
  • Fig. 1 in longitudinal section the backrest bar with a slider and a carriage (not shown) carrying the backrest and the adjustment device for adjusting the slider in the backrest bar and
  • FIG. 2 is a partial view of the Tei le of FIG. 1 on the side facing the backrest.
  • the embodiment of FIGS. 1 and 2 shows a chair in which the backrest bar 6 can be pivotally mounted on the bearing block 2 or the seat support 33.
  • the representation is only limited to the parts that are required for the adjustment of the backrest in a basic setting and the automatic adjustment of the backrest in or on the backrest bar.
  • Fig. 1 shows an adjusting device with the toggle lever 20 which can be pivotally mounted both on the fixed bearing block 2 of a chair and on the seat support 33 which can be changed in inclination relative to the bearing block 2.
  • the slider 5 In the backrest bar 6, the slider 5 is guided in an adjustable manner, damping elements 7 preventing or damping adjustment noises.
  • the slide 10 is guided on the slide 5 in an adjustable manner.
  • the carriage 10 carries the horizontally directed tube section 9 to which the backrest 35, not shown, is attached.
  • the spring 8 Arranged between the slide 5 and the slide 10 is the spring 8 designed as a U-shaped leaf spring, which laterally encloses the slide 10 with its side legs and is supported with its transverse leg below the slide 10 on the side of the slide 5 facing the backrest 35.
  • the slide 5 carries in the itte a series of bores 37 which are made at regular intervals.
  • the cross leg of the spring 8 carries in the middle the locking bolt 11, which protrudes in the direction of the slide 5 thereon and preferably runs out at the free end into an insertion tip, an insertion truncated cone or the like, so that it can more easily snap into a bore 37 of the slide 5.
  • the button 12 On the side facing away from the backrest 35, the button 12 is built into the backrest bar 6, specifically outside the adjustment range of the backrest, which the Enclose backrest bar 6 and can accommodate in one shot.
  • the key 12 is raised with two extensions to the side of the slider 5 and intervenes the spring 8 even when the carriage 10 is in its highest position on the slider 5.
  • the spring 8 By pressing the button 12, the spring 8 can therefore be deflected via the extensions and the locking connection between the locking pin 11 and the slide 5 can be canceled.
  • the carriage 10 with the backrest is then adjustable on the slider 5 until the locking pin 11 engages again in a bore 37 of the slide 5 after releasing the button 12.
  • the adjustment path of the slide 10 on the slide 5 is limited to a predetermined value by stops of the slide 5, which can be designed, for example, as pins inserted into bores. By stopping the carriage 10 on these pins, the adjustment path of the carriage 10 on the slide 5 'is fixed.
  • This additional adjustability of the backrest on the slider 5, which is automatically adjusted even in or on the backrest bar 6 when the backrest bar 6 is tilted backward, allows a basic adjustment of the backrest when the backrest bar 6 is erected steeply and thus an adaptation of the anatomically designed backrest to the height of the body User in order to obtain the optimal seating comfort adapted to the height of the user in all positions of the backrest rod 6.
  • the button 12 is supported on the slide 5 by means of the elastic element 21, which can be designed, for example, as a foam block covered by adhesive film 18.
  • D eses elastic element 21 acts as a return spring, which resets the button 12 after releasing.
  • the spring 8 is released for the locking of the locking pin 11 in a bore 37 of the slide 5.
  • the adjusting device for the screen 5 is embodied in the exemplary embodiment as a toggle lever 20 which is rotatably mounted with the pivot axis 19 embodied as a bearing pin on the fixed bearing block 2 or a seat bracket 33 pivotably mounted on the bearing block 2 and adjustable in inclination.
  • the bearing pin is supported in the side legs of the bearing block 2 or seat support 33 which is U-shaped in cross section.
  • the opening 32 provides space for the toggle lever 20 so that the overall height can be kept small.
  • the backrest bar 6 is also provided with side legs and is open towards the backrest.
  • the bearing block 2 or the seat support 33 protrudes between the side legs of the backrest bar 6 and is rotatably mounted therein with the pivot axis 16 formed as a bearing pin.
  • the bearing block 2 or the seat support 33 has in the bearing area the recess 31 through which the extension 17 is inserted and is articulated by means of the bearing sleeve 24 on the hinge pin 22.
  • the hinge pin 22 is arranged at the end of a lever arm ⁇ 28 of the toggle lever 20 which, in the initial position of the chair, ie with the backrest bar 6 erected steeply, such as the bearing block 2 or the seat support 33, runs approximately horizontally.
  • the driving pin 25 is fixed, which is received by the sliding block 26.
  • the sliding block 26 is guided in the guide slot 27 of the other lever arm 29 of the toggle lever 20 in an adjustable manner.
  • the pivot pin 22 describes a movement path 30 which lies on a circular path about the pivot axis 19 of the toggle lever 20.
  • the extension 17 is a separate part which is firmly connected to the sc ubber 5 by means of the connecting lug 23, the screw 15 and the spring ring 14.
  • the driving pin 25 of the backrest rod 6 describes the pivot path 36 when pivoting, which lies on a circular path around the pivot axis 16.
  • the carrier pin 25 is additionally guided in an adjustable manner in guide slots in the fixed bearing block 2.
  • the cover 13 covers a portion of the open side of the backrest rod 6 outside the adjustment range of the carriage 10.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Special Chairs (AREA)

Abstract

Une chaise, notamment une chaise de travail de bureau, possède une barre de dossier (6) d'inclinaison réglable par rapport au siège et un dossier (35) réglable sur ladite barre au moyen d'une coulisse (5) ou similaire. Ladite coulisse ou similaire peut coulisser dans ou sur la barre de dossier (6) en direction du siège au moyen d'un dispositif de réglage (20) lorsque ladite barre est inclinée vers l'arrière. Pour améliorer encore le confort de la chaise de manière très simple, le dossier (35) est relié à un curseur (10) ou similaire qui est en outre réglable sur une distance prédéterminée dans ou sur la coulisse (5) et se fixe dans plusieurs positions.A chair, in particular an office work chair, has a backrest bar (6) of adjustable inclination relative to the seat and a backrest (35) adjustable on said bar by means of a slider (5) or the like. Said slider or the like can slide in or on the backrest bar (6) towards the seat by means of an adjusting device (20) when said bar is tilted backwards. To further improve the comfort of the chair in a very simple way, the backrest (35) is connected to a slider (10) or the like which is additionally adjustable over a predetermined distance in or on the slide (5) and is fixed in several positions.

Description

Stuhl, insbesondere Arbeits- oder Bürostuhl Chair, in particular work or office chair
e Erfindung betrifft einen Stuhl, insbesondere Arbeits- odere invention relates to a chair, in particular work or
Bürostuhl, mit einem in der Neigung gegenüber dem Sitz veränderbaren Rückenlehnenstab und einer daran ittels einesOffice chair, with a backrest bar that can be changed in inclination relative to the seat and one attached to it
Sc iebers oder dgl. verstellbaren Rückenlehne, wobei derSc iebers or the like. Adjustable backrest, the
Schieber oder dgl. mittels einer VerStelleinrichtung beimSlider or the like. By means of an adjustment device at
Rückwärtsneigen des Rüc ken lehnenstabes im oder am Rückenlehnenstab in Richtung zum Sitz verschiebbar ist.Tilting the back of the backrest bar in or on the backrest bar is slidable towards the seat.
Die bekannten Stühle dieser Art bieten einen ausgezeichneten Sitzkomfort, da sie einerseits in der Ausgangs- oder Arbeitsstellung dank der praktisch senkrechten Stellung der Rückenlehne ein eindeutiges Abstützen des Rückens des Benutzers erbringen, andererseits aber nach dem Rückwärtsneigen des Rückenlehnenstabes ein entspanntes Sitzen ermöglichen. Bei Rückwärtsneigen des Rückenlehnenstabes macht der Oberkörper des Benutzers nicht einfach eine Schwenkbewegung, sondern es ergibt sich eine aus verschiedenen Bewegungs komponenten überlagerte Bewegung. Da die Rückenlehne beim Rückwärtsneigen des Rüc ken lehnenstabes eine zusätzliche Abwärtsbewegung in Richtung zum Sitz ausführt, wird eine Relativbewegung zwischen dem Rücken des Benutzers und der Rückenlehne vermieden oder zumindest auf einen nicht mehr bemerkbaren Wert reduziert.The known chairs of this type offer excellent seating comfort, since on the one hand they provide a clear support for the back of the user in the starting or working position thanks to the practically vertical position of the backrest, but on the other hand they enable relaxed sitting after the backrest bar has been tilted backwards. When the backrest bar tilts backwards, the user's upper body does not simply make a swiveling movement, but rather there is a movement superimposed on different movement components. Since the backrest executes an additional downward movement towards the seat when the backrest bar is tilted backwards, a relative movement between the back of the user and the backrest is avoided or at least reduced to an undetectable value.
Diese bekannten Stühle haben den Nachteil, daß die Rückenlehne in der steilen Ausgangsstellung des Rückenlehnenstabes eine definierte Stellung zum Sitz einnimmt, die an eine mittlere Körpergröße des Benutzers angepaßt ist. Da die Rückenlehne eine anatomisch angepaßte Form aufweist, ist das Optimum des Sitzkomforts nur für Benutzer mit annähernd der mittleren Körpergröße erreicht.These known chairs have the disadvantage that the backrest assumes a defined position in relation to the seat in the steep starting position of the backrest bar, which is in a middle position Height of the user is adjusted. Since the backrest has an anatomically adapted shape, the optimum in seating comfort is only achieved for users of approximately medium height.
Es ist Aufgabe der Erfindung, bei einem Stuhl der eingangs erwähnten Art auf einfache Art zu erreichen, daß neben dem Ausgleich der Relativbewegung zwischen dem Körper des Benutzers und der Rückenlehne beim Rückwärtsneigen des Rücken lehnenstabes zusätzlich eine Möglichkeit besteht, die Rückenlehne in eine an die Körpergröße des Benutzers angepaßte Grundeinstellung zu bringen.It is an object of the invention to achieve in a chair of the type mentioned in a simple manner that, in addition to compensating for the relative movement between the body of the user and the backrest when the backrest is tilted backwards, there is also a possibility of adjusting the backrest to a body size bring the user adjusted basic setting.
Diese Aufgabe wird nach der Erfindung dadurch gelöst, daß die Rückenlehne mit einem Schlitten oder dgl. verbunden st, der im oder am Sc ieber oder dgl. zusätzlich über einen vorgegebenen VerstelLweg verstellbar und in * mehreren Stellungen festlegbar ist.This object is achieved according to the invention in that the backrest is connected to a slide or the like, which is additionally adjustable in or on the scanner or the like via a predetermined adjustment path and can be fixed in * several positions.
Mit dem zusätzlichen, gegenüber dem Schieber oder dgl. verstellbaren Schlitten oder dgl. wird erreicht, daß ohne Beeinflussung des Verstellweges des Schiebers oder dgl., der über die VerStelleinrichtung selbsttätig ausgeführt wird, die Rückenlehne mit dem Schlitten oder dgl. über einen separaten Verstellweg in eine Srundeinstellung gebracht werden kann, die an die Körpergröße des Benutzers angepaßt st. Die- anatomische Ausbildung der Rückenlehne kommt damit für jeden Benutzer unabhängig von seiner Körpergröße voll zur Wirkung und dies mit e nem relativ kleinen Mehraufwand.With the additional slide or the like which is adjustable relative to the slide or the like, the backrest with the slide or the like can be achieved via a separate adjustment path without influencing the adjustment path of the slide or the like, which is carried out automatically via the adjusting device a basic setting can be brought that is adapted to the height of the user. The anatomical design of the backrest therefore comes into full effect for every user regardless of their body size and with a relatively small additional effort.
Die Einstellung des Schlittens oder dgl. in mehrere, definierte Stellungen über seinen Verstellweg im oder am Schieber oder dgl. wird auf einfache Art dadurch erreicht, daß an dem Schlitten oder dgl. eine Feder mit Rastbolzeπ angebracht ist, der in eine von mehreren Bohrungen des Schiebers oder dgl. einrastbar ist, und daß mittels einer Taste, die im Rückenlehnenstab angeordnet ist, die Feder auslenkbar und da it die Rastverbindung zwischen dem Rastbolzen und dem Schieber oder dgl. aufhebbar ist.The setting of the slide or the like in several, defined positions via its adjustment path in or on the slide or the like is achieved in a simple manner by that a spring with Rastbolzeπ is attached to the carriage or the like, which can be snapped into one of several bores of the slide or the like, and that by means of a button which is arranged in the backrest rod, the spring can be deflected and since it is the latching connection between the Locking pin and the slide or the like. Can be canceled.
Nach dem Loslassen der Taste stellt sich die Raststellung zwischen dem Rastbolzen und dem Schieber oder dgl. dann selbsttätig ein, wenn vorgesehen ist, daß sich die Taste ittels eines elastischen Elementes als Rückstellfeder am Schieber oder dgl. abstützt und mit Verlängerungen bis inter die Feder in der höchsten Stellung der Rückenlehne und damit des Schlittens oder dgl. geführt ist.After releasing the button, the locking position between the locking pin and the slider or the like. Then sets itself automatically if it is provided that the button is supported by an elastic element as a return spring on the slider or the like the highest position of the backrest and thus the carriage or the like.
Eine besonders vortei lhafte Ausgestaltung ist dadurch gekennzeichnet, daß die Feder als U-förmige Blattfeder ausgebildet ist, die mit ihren Seitenschenkeln den Schlitten oder dgl. seitlich umschließt und sich mit ihrem Querschenkel auf der dem Sitz zugekehrten Seite des Schlittens oder dgl. auf der der Rückenlehne zugekehrten Seite des Schiebers oder dgl. abstützt, und daß die Taste auf der der Rückenlehne abgekehrten Seite des Rüc ken lehnenstabes außerhalb des Verstellweges der Rückenlehne angeordnet ist. Die Taste ist dann stets leicht zugänglich und die Feder mit dem Rastbolzen st leicht in dem Rückenlehnenstab unterzubringen.A particularly advantageous embodiment is characterized in that the spring is designed as a U-shaped leaf spring, which laterally encloses the carriage or the like with its side legs and with its transverse leg on the side of the carriage or the like facing the seat Backrest facing side of the slide or the like. Is supported, and that the button on the side facing away from the backrest of the backrest bar is arranged outside the adjustment path of the backrest. The button is then always easily accessible and the spring with the locking pin st can easily be accommodated in the backrest bar.
Die Rastkraft wird symmetrisch und gleichförmig auf den Rastbolzen übertragen, wenn die Ausgestaltung so vorgenommen ist, daß der Rastbolzen am Querschenkel der Feder mittig angebracht ist und in Richtung zum Schieber oder dgl. an diesem absteht und daß die Reihe von Bohrungen im Schieber oder dgl. mi tig in gleichmäßigen Abständen eingebracht sind. Der Verstellweg des Schlittens oder dgl. m oder am Schieber oder dgl. wird durch Anschläge begrenzt, die vorzugsweise am Schieber oder dgl. angebracht s nd.The locking force is transferred symmetrically and uniformly to the locking pin if the configuration is made such that the locking pin is attached centrally to the cross leg of the spring and protrudes toward the slide or the like. This and that the series of holes in the slide or the like. are brought in at regular intervals. The adjustment path of the carriage or the like. M or on the slide or the like. Is limited by stops, which are preferably attached to the slide or the like.
Das Einrasten des Rastbolzens in eine Bohrung des Schiebers oder dgl. wird dadurch verbessert, daß das freie Ende des Rastbolzens in eine Einführspitze, einen Ei nführkege Istumpf oder dgl. ausläuft.The engagement of the locking pin in a bore of the slide or the like. Is improved in that the free end of the locking pin in an insertion tip, an egg nführkege Istumpf or the like.
Die VerStelleinrichtung für den Schieber oder dgl. ist vorzugsweise so ausgebildet, daß die VerStelleinrichtung nur einen einzigen Kniehebel aufweist, der an einem den Sitz tragenden Lagerbock oder an einem am Lagerbock in der Neigung veränderbaren Sitzträger um eine horizontale Schwenkachse schwenkbar gelagert ist, daß eine Verlängerung der Rückenlehne gelenkig mit dem Ende des e nen Hebelarmes des Kniehebels verbunden ist, und daß das Ende des anderen Hebelarmes des Kniehebels mittels eines M tnehmerbolzens oder dgl. des Rücken lehnenstabes und/oder des Sitzträgers so verschwenkbar ist, daß beim Rückwärtsneigen des Rücken lehnenstabes und/oder dem Absenken des Sitzträgers der eine Hebelarm des Kniehebels die Verlängerung und damit die Rückenlehne in Richtung zum Lagerbock oder Sitzträger verste l It .The adjusting device for the slide or the like is preferably designed in such a way that the adjusting device has only a single toggle lever which is pivotably mounted about a horizontal pivot axis on a bearing bracket which supports the seat or on a seat bracket which can be changed in inclination on the bearing bracket, so that an extension the backrest is articulated to the end of the lever arm of the toggle lever, and that the end of the other lever arm of the toggle lever is pivotable by means of a bolt or the like / or the lowering of the seat support one lever arm of the knee lever the extension and thus the backrest in the direction of the bearing block or seat support understand it.
Die Erfindung wird anhand e nes in den Zeichnungen dargestellten Ausführungsbei spi e Is näher erläutert. Es zeigt:The invention is explained in more detail with reference to an embodiment shown in the drawings. It shows:
Fig. 1 im Längsschnitt den Rückenlehnenstab mit einem Schieber und einem die (nicht dargestellte) Rückenlehne tragenden Schlitten sowie die Verstelleinrichtung zum Verstellen des Schiebers im Rückenlehnenstab undFig. 1 in longitudinal section the backrest bar with a slider and a carriage (not shown) carrying the backrest and the adjustment device for adjusting the slider in the backrest bar and
Fig. 2 die Teilansicht der Tei le nach Fig. 1 auf die der Rückenlehne zugekehrte Seite. Das Ausführungsbeispiel nach den Fig. 1 und 2 zeigt einen Stuhl, bei dem der Rückenlehnenstab 6 an dem Lagerbock 2 oder dem Sitzträger 33 schwenkbar gelagert sein kann. Die Darstellung ist dabei nur auf die Tei le beschränkt, die für die Einstellung der Rückenlehne in eine Grundeinstellung und die selbsttätige Verstellung der Rückenlehne im oder am Rückenlehnenstab erforderlich sind. Fig. 1 läßt eine VerStelleinrichtung mit dem Kniehebel 20 erkennen, der sowohl an dem feststehenden Lagerbock 2 eines Stuhles, als auch an dem in der Neigung gegenüber dem Lagerbock 2 veränderbaren Sitzträger 33 schwenkbar gelagert sein kann.Fig. 2 is a partial view of the Tei le of FIG. 1 on the side facing the backrest. The embodiment of FIGS. 1 and 2 shows a chair in which the backrest bar 6 can be pivotally mounted on the bearing block 2 or the seat support 33. The representation is only limited to the parts that are required for the adjustment of the backrest in a basic setting and the automatic adjustment of the backrest in or on the backrest bar. Fig. 1 shows an adjusting device with the toggle lever 20 which can be pivotally mounted both on the fixed bearing block 2 of a chair and on the seat support 33 which can be changed in inclination relative to the bearing block 2.
In dem Rückenlehnenstab 6 ist der Schieber 5 verstellbar geführt, wobei Dämpfungselemente 7 Verstellgeräusche verhindern bzw. dämpfen. Auf dem Schieber 5 ist der Schlitten 10 verstellbar geführt. Der Schlitten 10 trägt den horizontal gerichteten Rohrabschnitt 9, an dem die nicht dargestellte Rückenlehne 35 befestigt wird. Zwischen dem Schieber 5 und dem Schlitten 10 ist die als U-förmige Blattfeder ausgebildete Feder 8 angeordnet, die mit ihren Seitenschenkeln den Schlitten 10 seitlich umschließt und sich mit ihrem Querschenkel unterhalb des Schlittens 10 auf der der Rückenlehne 35 zugekehrten Seite des Schiebers 5 abstützt. Der Schieber 5 trägt in der itte eine Reihe von Bohrungen 37, die in gleichmäßigen Abständen eingebracht sind. Der Querschenkel der Feder 8 trägt mittig den Rastbolzen 11, der in Richtung zum Schieber 5 an diesem absteht und am freien Ende vorzugsweise in eine Einführspitze, einen Einführkegelstumpf oder dgl. ausläuft, damit er leichter in eine Bohrung 37 des Schiebers 5 einrasten kann.In the backrest bar 6, the slider 5 is guided in an adjustable manner, damping elements 7 preventing or damping adjustment noises. The slide 10 is guided on the slide 5 in an adjustable manner. The carriage 10 carries the horizontally directed tube section 9 to which the backrest 35, not shown, is attached. Arranged between the slide 5 and the slide 10 is the spring 8 designed as a U-shaped leaf spring, which laterally encloses the slide 10 with its side legs and is supported with its transverse leg below the slide 10 on the side of the slide 5 facing the backrest 35. The slide 5 carries in the itte a series of bores 37 which are made at regular intervals. The cross leg of the spring 8 carries in the middle the locking bolt 11, which protrudes in the direction of the slide 5 thereon and preferably runs out at the free end into an insertion tip, an insertion truncated cone or the like, so that it can more easily snap into a bore 37 of the slide 5.
Auf der der Rückenlehne 35 abgekehrten Seite ist in den Rückenlehnenstab 6 die Taste 12 eingebaut und zwar außerhalb des Verstellbereiches der Rückenlehne, die den Rückenlehnenstab 6 umschließen und in einer Aufnahme aufnehmen kann. Die Taste 12 ist mit zwei Verlängerungen seitlich des Schiebers 5 hochgeführt und intergreift die Feder 8 auch dann noch, wenn der Schlitten 10 auf dem Schieber 5 seine höchste Stellung einnimmt. Durch Druck auf die Taste 12 kann daher über die Verlängerungen die Feder 8 ausgelenkt und d e Rastverbindung zwischen dem Rastbolzen 11 und dem Schieber 5 aufgehoben werden. Der Schlitten 10 mit der Rückenlehne ist dann auf dem Schieber 5 verstellbar, bis der Rastbolzen 11 nach dem Loslassen der Taste 12 wieder in eine Bohrung 37 des Sc iebers 5 einrastet. Der Verstellweg des Schl ttens 10 auf dem Schieber 5 st auf einen vorgegebenen Wert begrenzt und zwar durch Anschläge des Schiebers 5, die z.B. als in Bohrungen eingesetzte Stifte ausgebildet sein können. Durch Anschlag des Schlittens 10 an diesen Stiften wird der Verstellweg des Schlittens 10 auf dem Schieber 5' festgelegt. Diese zusätzliche Verstellbarkeit der Rückenlehne an dem Schieber 5, der selbst im oder am Rückenlehnenstab 6 beim Rückwärtsneigen des Rückenlehnenstabes 6 selbsttät g verstellt w rd, erlaubt eine Grundeinstellung der Rückenlehne bei steil aufgerichtetem Rückenlehnenstab 6 und damit eine Anpassung der anatomisch gestalteten Rückenlehne an die Körpergröße des Benutzers, um den optimalen, an die Körpergröße des Benutzers angepaßten Sitzkomfort in allen Stellungen des Rücken lehnenstabes 6 zu erhalten.On the side facing away from the backrest 35, the button 12 is built into the backrest bar 6, specifically outside the adjustment range of the backrest, which the Enclose backrest bar 6 and can accommodate in one shot. The key 12 is raised with two extensions to the side of the slider 5 and intervenes the spring 8 even when the carriage 10 is in its highest position on the slider 5. By pressing the button 12, the spring 8 can therefore be deflected via the extensions and the locking connection between the locking pin 11 and the slide 5 can be canceled. The carriage 10 with the backrest is then adjustable on the slider 5 until the locking pin 11 engages again in a bore 37 of the slide 5 after releasing the button 12. The adjustment path of the slide 10 on the slide 5 is limited to a predetermined value by stops of the slide 5, which can be designed, for example, as pins inserted into bores. By stopping the carriage 10 on these pins, the adjustment path of the carriage 10 on the slide 5 'is fixed. This additional adjustability of the backrest on the slider 5, which is automatically adjusted even in or on the backrest bar 6 when the backrest bar 6 is tilted backward, allows a basic adjustment of the backrest when the backrest bar 6 is erected steeply and thus an adaptation of the anatomically designed backrest to the height of the body User in order to obtain the optimal seating comfort adapted to the height of the user in all positions of the backrest rod 6.
Die Taste 12 stützt sich mittels des elastischen Elementes 21, das z.B. als ein mittels Klebefolie 18 abgedeckter Schaumstoffb lock ausgebildet sein kann, an dem Schieber 5 ab. D eses elastische Element 21 wirkt als Rückstellfeder, die die Taste 12 nach dem Loslassen zurückstellt. Dabei wird die Feder 8 für das Einrasten des Rastbolzens 11 in eine Bohrung 37 des Schiebers 5 freigegeben. Die VerStelleinrichtung für den Sc ieber 5 ist im Ausführungsbeispiel als Kniehebel 20 ausgebi ldet, der mit der als Lagerbolzen ausgebildeten Schwenkachse 19 an dem ortsfesten Lagerbock 2 oder einem am Lagerbock 2 schwenkbar gelagerten und in der Ne gung veränderbaren Sitzträger 33 verdrehbar gelagert ist. Der Lagerbolzen ist dabei in den Seitenschenkeln des im Querschnitt U-förmigen Lagerbockes 2 oder Sitzträgers 33 gelagert. Der Durchbruch 32 gibt dabei Platz für den Kniehebel 20, so daß die Bauhöhe klein gehalten werden kann. Auch der Rückenlehnenstab 6 ist mit Seitenschenkeln versehen und zur Rückenlehne hin offen. Der Lagerbock 2 oder der Sitzträger 33 ragt zwischen die Seitenschenkel des Rückenlehnenstabes 6 und ist mit der als Lagerbolzen ausgebi ldeten Schwenkachse 16 darin drehbar gelagert. Der Lagerbock 2 oder der Sitzträger 33 weist im Lagerbereich die Ausnehmung 31 auf, durch die die Verlängerung 17 eingeführt und mittels der Lagerhülse 24 auf dem Gelenkbolzen 22 gelenkig gelagert ist. Der Gelenkbolzen 22 ist am Ende des einen Hebelarme^ 28 des Kniehebels 20 angeordnet, der in der Ausgangsstellung des Stuhles, d.h. bei stei l aufgerichtetem Rückenlehnenstab 6, wie der Lagerbock 2 oder der Sitzträger 33 etwa horizontal verläuft. In dem über die Schwenkachse 16 hinaus verlängerten Bereich des Rückenlehnenstabes 6 ist der Mitnehmerbolzen 25 festgelegt, der von dem GLeitstein 26 aufgenommen wird. Der Gleitstein 26 ist in dem Füh rungssch l i tz 27 des anderen Hebelarmes 29 des Kniehebels 20 verstellbar geführt. Der Gelenkbolzen 22 beschreibt beim Verschwenken des Kniehebels 20 eine Bewegungsbahn 30, die auf einer Kreisbahn um die Schwenkachse 19 des Kniehebels 20 liegt. Die Abstimmung der 'Schwenkbewegung des Rückenlehnenstabes 6 ist nun so, daß die Lagerhülse 24 der Verlängerung 17 eine Bewegungsbahn beschreibt, die mit der Bewegungsbahn 30 des Gelenkbolzens 22 zusammenfällt und identisch ist. Dann ist erreicht, daß die Verlängerung 17 starr mit dem Schieber 5 verbunden werden oder einstück g mit diesem ausgebildet sein kann. Durch die Auslegung der Hebelarme 28 und 29 des Kniehebels 20 und die Abstände des Gelenkbolzens 22 und des Mitnehmerbolzens 25 von der Schwenkachse 19 des Kniehebels 20 kann eine entsprechende Abstimmung vorgenommen werden. Auch der Abstand der Schwenkachsen 16 und 19 am Lagerbock 2 oder am Sitzträger 33 ist ein Parameter, der zur Festlegung des Verstellweges des Schiebers 5 herangezogen werden kann.The button 12 is supported on the slide 5 by means of the elastic element 21, which can be designed, for example, as a foam block covered by adhesive film 18. D eses elastic element 21 acts as a return spring, which resets the button 12 after releasing. The spring 8 is released for the locking of the locking pin 11 in a bore 37 of the slide 5. The adjusting device for the screen 5 is embodied in the exemplary embodiment as a toggle lever 20 which is rotatably mounted with the pivot axis 19 embodied as a bearing pin on the fixed bearing block 2 or a seat bracket 33 pivotably mounted on the bearing block 2 and adjustable in inclination. The bearing pin is supported in the side legs of the bearing block 2 or seat support 33 which is U-shaped in cross section. The opening 32 provides space for the toggle lever 20 so that the overall height can be kept small. The backrest bar 6 is also provided with side legs and is open towards the backrest. The bearing block 2 or the seat support 33 protrudes between the side legs of the backrest bar 6 and is rotatably mounted therein with the pivot axis 16 formed as a bearing pin. The bearing block 2 or the seat support 33 has in the bearing area the recess 31 through which the extension 17 is inserted and is articulated by means of the bearing sleeve 24 on the hinge pin 22. The hinge pin 22 is arranged at the end of a lever arm ^ 28 of the toggle lever 20 which, in the initial position of the chair, ie with the backrest bar 6 erected steeply, such as the bearing block 2 or the seat support 33, runs approximately horizontally. In the area of the backrest bar 6 that is extended beyond the pivot axis 16, the driving pin 25 is fixed, which is received by the sliding block 26. The sliding block 26 is guided in the guide slot 27 of the other lever arm 29 of the toggle lever 20 in an adjustable manner. When pivoting the toggle lever 20, the pivot pin 22 describes a movement path 30 which lies on a circular path about the pivot axis 19 of the toggle lever 20. The coordination of the ' pivoting movement of the backrest bar 6 is now such that the bearing sleeve 24 of the extension 17 describes a movement path which coincides with the movement path 30 of the pivot pin 22 and is identical. Then that extension is achieved 17 rigidly connected to the slider 5 or piece g can be formed with this. By designing the lever arms 28 and 29 of the toggle lever 20 and the distances of the hinge pin 22 and the driving pin 25 from the pivot axis 19 of the toggle lever 20, a corresponding adjustment can be made. The distance between the pivot axes 16 and 19 on the bearing block 2 or on the seat support 33 is also a parameter which can be used to determine the adjustment path of the slide 5.
Im Ausführungsbeispiel ist die Verlängerung 17 ein getrenntes Teil, das mittels der Verbindungslasche 23, der Schraube 15 und dem Federring 14 fest mit dem Sc ieber 5 verbunden ist. Der Mitnehmerbolzen 25 des Rücken lehnenstabes 6 beschreibt beim Verschwenken die Bewegungsbahn 36, die auf einer Kreisbahn um die Schwenkachse 16 liegt. Beim Verschwenken des Rückenlehnenstabes ' 6 entgegen dem Uhrzeigersinn, wird, wie Fig. 1 zu entnehmen ist, von dem Mitnehmerbolzen 25 der andere Hebelarm 29 des Kniehebels 20 im gleichen Drehsinn mit verschwenkt. Dabei ändert sich der Abstand des Mi tnehmerbo Lzens 25 von der Schwenkachse 19 des Kniehebels 20. Aus d esem Grunde ist der vom GleitsteinIn the exemplary embodiment, the extension 17 is a separate part which is firmly connected to the sc ubber 5 by means of the connecting lug 23, the screw 15 and the spring ring 14. The driving pin 25 of the backrest rod 6 describes the pivot path 36 when pivoting, which lies on a circular path around the pivot axis 16. Upon pivoting of the backrest frame '6 in the counterclockwise direction, as shown Fig. 1 is given, by the driving pin 25 of the other lever arm 29 of the toggle lever 20 pivots in the same direction with. The distance of the Mi tnehmerbo Lzens 25 changes from the pivot axis 19 of the toggle lever 20. For this reason, that of the sliding block
26 aufgenommene Mitnehmerbolzen 25 in dem Führungsschlitz26 driver pins 25 received in the guide slot
27 des anderen Hebelarmes 29 des Kniehebels 20 längsverstellbar geführt, um seine Schwenkbewegung auf der Bewegungsbahn 36 ungehindert ausführen zu können.27 of the other lever arm 29 of the toggle lever 20 is longitudinally adjustable in order to be able to carry out its pivoting movement on the movement path 36 unhindered.
Ist der Kniehebel 20 an dem Sitzträger 33 schwenkbar gelagert, dann ist der itnehmerbolzen 25 zusätzlich in Fü rungsschlitzen des ortsfesten Lagerbockes 2 verstellbar geführt .If the toggle lever 20 is pivotally mounted on the seat support 33, then the carrier pin 25 is additionally guided in an adjustable manner in guide slots in the fixed bearing block 2.
Die Abdeckung 13 deckt außerhalb des Verstellbereiches des Schlittens 10 einen Teil der offenen Seite des Rücken lehnenstabes 6 ab. The cover 13 covers a portion of the open side of the backrest rod 6 outside the adjustment range of the carriage 10.

Claims

A n s p r ü c h e Expectations
1. Stuhl, insbesondere Arbeits- oder Bürostuhl, mit einem in der Neigung gegenüber dem Sitz veränderbaren Rückenlehnenstab und einer daran mittels eines Schiebers oder dgl. verstellbaren Rückenlehne, wobei der Schieber oder dgl. mittels einer VerStelleinrichtung beim Rückwärtsneigen des Rücken lehnenstabes im oder am Rückenlehnenstab in Richtung zum Sitz versc iebbar ist, dadurch gekennze chnet, daß die Rückenlehne mit einem Schlitten (10) oder dgl. verbunden ist, der im oder am Schieber (5) oder dgl. zusätzlich über einen vorgegebenen Verstellweg verstellbar und in mehreren Stellungen festlegbar ist.1. Chair, in particular work or office chair, with a backrest bar that can be changed in inclination relative to the seat and a backrest that can be adjusted thereon by means of a slider or the like, the slider or the like using an adjusting device when the backrest bar is tilted back in or on the backrest bar is displaceable towards the seat, characterized in that the backrest is connected to a slide (10) or the like, which is additionally adjustable in or on the slide (5) or the like via a predetermined adjustment path and can be fixed in several positions .
2. Stuhl nach Anspruch 1, dadurch gekennze chnet, daß an dem Schlitten (10) oder dgl. eine Feder (8) mit Rastbolzen (11) angebracht ist, der in eine von mehreren Bohrungen (37) des Schiebers (5) oder dgl. einrastbar ist, und daß mittels einer Taste (12), die im Rückenlehnenstab (6) angeordnet ist, die Feder (8) auslenkbar und damit die Rastverbindung zwischen dem Rastbolzen (11) und dem Schieber (5) oder dgl. aufhebbar ist.2. Chair according to claim 1, characterized in that on the carriage (10 ) or the like. A spring (8) with locking bolt (11) is attached, which in one of several bores (37) of the slide (5) or the like is clickable, and that by means of a button ( 12 ) which is arranged in the backrest bar (6), the spring (8) can be deflected and thus the latching connection between the latching bolt (11) and the slide (5) or the like can be canceled.
Stuhl nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß sich die Taste (12) mittels eines elastischenChair according to claim 1 or 2, characterized in that the button (12 ) by means of an elastic
Elementes (21) als Rückstellfeder am Schieber (5) oder dgl. abstützt und m t Verlängerungen bis hinter dieElement (21) as a return spring on the slide (5) or the like. Is supported and m t extensions to behind the
Feder (8) in der höchsten Stellung der Rückenlehne und damit des Schlittens (10) oder dgl. geführt ist.Spring (8) is guided in the highest position of the backrest and thus the carriage ( 10 ) or the like.
Stuhl nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Feder (8) als U-förmige Blattfeder ausgebildet ist, d e mit hren Seitenschenkeln den Schl tten' (10) oder dgl. seitlich umschließt und sich mit ihremChair according to one of claims 1 to 3, characterized in that the spring (8) is designed as a U-shaped leaf spring which laterally encloses the sleeves ' (10) or the like with their side legs and engages with them
Querschenkel auf der dem Sitz zugekehrten Seite desCross leg on the side of the seat facing the seat
Schlittens (10) oder dgl. auf der der Rückenlehne zugekehrten Seite des Schiebers (5) oder dgl. abstützt, und daß die Taste (12) auf der der Rückenlehne abgekehrtenCarriage (10) or the like. On the side facing the backrest of the slide (5) or the like. Is supported, and that the button (12) on the side facing away from the backrest
Seite des Rücken lehnenstabes (6) außerhalb desSide of the backrest bar (6) outside the
Verstellweges der Rückenlehne angeordnet ist.Adjustment path of the backrest is arranged.
Stuhl nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Rastbolzen (11) am Querschenkel der Feder (8) mittig angebracht ist und in Richtung zum SchieberChair according to one of claims 1 to 4, characterized in that the locking bolt (11) is attached centrally to the cross leg of the spring (8) and in the direction of the slide
(5) oder dgl. an diesem absteht und daß die Reihe von Bohrungen (37) im Schieber (5) oder dgl. mittig in gleichmäßigen Abständen eingebracht sind. Stuhl nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Verstellweg des Schlittens (10) oder dgl. im oder am Schieber (5) oder dgl. mittels Anschlägen, insbesondere des Schiebers (5) oder dgl., begrenzt ist.(5) or the like protrudes from this and that the row of bores (37) in the slide (5) or the like are made in the center at regular intervals. Chair according to one of Claims 1 to 5, characterized in that the adjustment path of the slide (10) or the like in or on the slide (5) or the like is limited by means of stops, in particular the slide ( 5 ) or the like.
Stuhl nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das freie Ende des Rastbolzens (11) in eineChair according to one of claims 1 to 6, characterized in that the free end of the locking bolt (11) in a
Einführspitze, einen Einführkegelstumpf oder dgl. ausläuft.Insertion tip, an insertion truncated cone or the like.
Stuhl nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die VerStelleinrichtung nur einen einzigen KniehebelChair according to one of claims 1 to 7, characterized in that the adjusting device has only a single toggle lever
(20) aufweist, der an einem den Sitz tragenden Lagerbock(20), which on a bearing bracket supporting the seat
(2) oder an einem am Lagerbock (2) in der Neigung veränderbaren Sitzträger (33) um eine horizontale(2) or horizontal to a variable in inclination on the bearing block (2) the seat support (33) about a
Schwenkachse (19) schwenkbar gelagert ist, daß eine Verlängerung (17) der Rückenlehne (35) gelenkig mit dem Ende des einen Hebelarmes (28) des KniehebelsThe pivot axis (19) is pivotally mounted so that an extension (17) of the backrest (35) is articulated with the end of one lever arm (28) of the toggle lever
(20) verbunden ist, und daß das Ende des anderen Hebelarmes (29) des Kniehebels(20) is connected, and that the end of the other lever arm (29) of the toggle lever
(20) mittels eines Mitnehmerbolzens (25) oder dgl. des Rückenlehnenstabes (6) und/oder des Sitzträgers(20) by means of a driver bolt (25) or the like. The backrest bar (6 ) and / or the seat support
(33) so verschwenkbar ist, daß beim Rückwärtsneigen des Rüc ken lehnenstabes (6) und/oder dem Absenken des(33) can be pivoted so that when the back is tilted backrest bar (6) and / or the lowering of the
Sitzträgers der eine Hebelarm (28) des Kniehebels (20) die Verlängerung (17) und damit die Rückenlehne (35) in Richtung zum Lagerbock (2) oder Sitzträger (33) verstellt. Seat support one lever arm ( 28) of the toggle lever (20) adjusts the extension (17) and thus the backrest (35) in the direction of the bearing block (2) or seat support (33).
EP88909998A 1987-12-29 1988-12-03 Chair, in particular work or office chair Expired - Lifetime EP0397661B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88909998T ATE77217T1 (en) 1987-12-29 1988-12-03 CHAIR, ESPECIALLY WORK OR OFFICE CHAIR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873744363 DE3744363A1 (en) 1987-12-29 1987-12-29 CHAIR, ESPECIALLY WORK OR OFFICE CHAIR
DE3744363 1987-12-29

Publications (2)

Publication Number Publication Date
EP0397661A1 true EP0397661A1 (en) 1990-11-22
EP0397661B1 EP0397661B1 (en) 1992-06-17

Family

ID=6343761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88909998A Expired - Lifetime EP0397661B1 (en) 1987-12-29 1988-12-03 Chair, in particular work or office chair

Country Status (7)

Country Link
US (1) US5100200A (en)
EP (1) EP0397661B1 (en)
JP (1) JPH03502170A (en)
AT (1) ATE77217T1 (en)
CA (1) CA1332146C (en)
DE (2) DE3744363A1 (en)
WO (1) WO1989006099A1 (en)

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DE3838999A1 (en) * 1988-11-18 1990-05-23 Roeder Gmbh CHAIR, ESPECIALLY WORK OR OFFICE CHAIR
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US7237841B2 (en) * 2004-06-10 2007-07-03 Steelcase Development Corporation Back construction with flexible lumbar
US7458637B2 (en) * 2004-06-10 2008-12-02 Steelcase Inc. Back construction with flexible lumbar
US7396079B2 (en) * 2005-03-08 2008-07-08 Steelcase Inc. Seating with shape-changing back support frame
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Also Published As

Publication number Publication date
DE3744363A1 (en) 1989-07-13
CA1332146C (en) 1994-09-27
ATE77217T1 (en) 1992-07-15
WO1989006099A1 (en) 1989-07-13
DE3744363C2 (en) 1990-05-17
US5100200A (en) 1992-03-31
DE3872258D1 (en) 1992-07-23
EP0397661B1 (en) 1992-06-17
JPH03502170A (en) 1991-05-23

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