EP0179933A1 - Office chair - Google Patents

Office chair Download PDF

Info

Publication number
EP0179933A1
EP0179933A1 EP84113009A EP84113009A EP0179933A1 EP 0179933 A1 EP0179933 A1 EP 0179933A1 EP 84113009 A EP84113009 A EP 84113009A EP 84113009 A EP84113009 A EP 84113009A EP 0179933 A1 EP0179933 A1 EP 0179933A1
Authority
EP
European Patent Office
Prior art keywords
backrest support
support
seat plate
seat
backrest
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
EP84113009A
Other languages
German (de)
French (fr)
Other versions
EP0179933B1 (en
Inventor
Eckard Hansen
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.)
PROVENDA-MARKETING AG REHETOBEL
Original Assignee
Provenda-Marketing AG Rehetobel
Provenda Marketing AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=42307787&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0179933(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to CH2503/83A priority Critical patent/CH659179A5/en
Priority to DE19833316533 priority patent/DE3316533A1/en
Priority to AT84113009T priority patent/ATE64838T1/en
Priority to DE8484113009T priority patent/DE3484777D1/en
Priority to EP84113009A priority patent/EP0179933B1/en
Application filed by Provenda-Marketing AG Rehetobel, Provenda Marketing AG filed Critical Provenda-Marketing AG Rehetobel
Priority to US06/667,278 priority patent/US4682814A/en
Publication of EP0179933A1 publication Critical patent/EP0179933A1/en
Publication of EP0179933B1 publication Critical patent/EP0179933B1/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • A47C1/03255—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
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03283—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with fluid springs
    • 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

Definitions

  • the invention relates to a work chair, in particular office chair, with a seat support, a seat plate which is articulated at its front end at a front articulation point on the seat support, a pivotable backrest support with an arm reaching under the seat plate, means for adjusting the inclination of the seat plate in Dependency of the inclination of the backrest support and means for exerting force on the mechanism formed from the seat plate, backrest support and the first-mentioned means, or for locking the seat plate and backrest support in the position desired by the user.
  • Such work chairs are called synchronous work chairs because the adjustment of the inclination of the backrest support causes a simultaneous adjustment of the inclination of the seat plate.
  • Known synchronous work chairs of this type have a lockable spring unit, for example a gas spring, to lock the seat plate and the backrest support in the desired position. If the Federag g regat is not locked, the user of the work chair can rock, ie the two inclinations depending on the one to be carried out; Change work constantly. However, the user can only release the lock briefly and make a movement until he has reached the most comfortable position, after which he can then lock the chair in this position.
  • CH-PS 529 539 a work chair is described in which both the seat plate and the backrest support, which has an aluminum arm reaching under the seat plate, are attached to the seat support.
  • a double-articulated lever is provided which connects the seat plate to the seat support at a distance from the articulation point of the backrest support arm.
  • a gas spring serves both to exert force on the mechanism formed by the seat plate, backrest support and double-joint lever and to lock the seat plate and backrest support in the position desired by the user.
  • the gas spring is arranged practically perpendicular to the seat plate.
  • This training work Chair is relatively simple, but it has the major disadvantage that a relatively large relative movement between the backrest and the back of the person is caused when the seat is adjusted, which can result in the person in question taking his shirt out of his pants in the back area .
  • the relatively large relative movement is mainly due to the fact that the axis of rotation of the backrest support remains stationary, while the location of the hip joint of the chair user, i.e. the axis of rotation for the body, moves up and down together with the seat plate. Since gas springs have a relatively flat spring characteristic, there is also the disadvantage that if the user moves backwards with the backrest, the weight of the user is not compensated enough by the force of the gas spring.
  • this object is achieved in that the arm of the backrest support is articulated at the bottom or on the side of the seat plate, that the means for adjusting the
  • the inclination of the seat plate depending on the inclination of the backrest support is either formed by a double articulated lever which is articulated on the arm of the backrest support and with the other articulation on the seat support, or by a guide curve for the arm of the backrest support. Since the backrest support is not attached to the seat support but to the seat plate near the hip joint of the chair user, a relative movement between the backrest and the back of the chair user is practically avoided when the seat is adjusted.
  • a guide curve for the arm of the backrest support instead of a double articulated lever.
  • This guide curve can be formed by a slot in the seat support in which a cross bolt arranged on the arm of the backrest support runs.
  • the means for exerting force and for locking the seat plate and backrest support are expediently formed by a lockable spring unit, for example a gas spring.
  • Such spring assemblies are relatively inexpensive and fulfill a double function in that they both provide spring force and enable the chair to be locked. But it is also possible to provide separate means for locking and for generating the necessary spring force.
  • One end of the lockable spring assembly is advantageously pivotally attached to a pivot point of the arm of the backrest support and the other end to a pivot point on the seat carrier.
  • the arrangement of the articulation points is advantageously such that the spring travel of the spring assembly increases progressively with respect to the pivoting of the backrest support to the rear. This has the advantage that a correspondingly high counterforce counteracts the increased force exerted by the user tending backwards on the backrest.
  • the double articulated lever and spring assembly advantageously have a common articulation point. This simplifies the construction. Appropriately, in the foremost position of the backrest support, the joints of the double articulated lever and the articulation points of the spring assembly are practically in line. This arrangement ensures that the spring travel of the spring assembly increases progressively with respect to the pivoting of the backrest to the rear.
  • the seat support 1 is carried in the usual manner by a base with a standpipe and a height lift. However, these parts are not shown in the drawing.
  • the seat plate 2 is pivotally mounted on the seat support 1 in the region of its front end by means of an elastic connecting plate 3.
  • the connecting plate 3 thus forms the front articulation point.
  • the backrest support 4 is provided with an arm projecting downwards under the seat plate 2, which is articulatedly connected to the seat plate 2 in the rear region of the seat plate 2, that is to say very close to where the user's hip joint is normally located.
  • a double articulated lever 10 ' connects the arm 5 to the seat support 1 in such a way that when the backrest support 4 moves backwards, the seat plate 2 is inclined downward.
  • the reference numerals 9 and 11 denote the joints of the double joint lever 10 '.
  • a cross bolt can be used as the joint 9, which extends from one side of the chair to the other.
  • a lockable spring unit 7 is connected at one end via a joint 8 to the seat support 1 and at the other end to the arm 5 of the backrest support 4.
  • the lockable spring unit can be of any type, be it mechanical, hydraulic, pneumatic or in any combination of these working methods. But it would also be possible to provide a separate locking device and a separate spring. If a cross pin is used as the joint 9, it is expedient to use this cross pin 9 also for articulating the lockable spring assembly, for example a gas spring 7.
  • the drawing shows, without further explanation, how the individual parts move from the least inclined position shown with solid lines to the most inclined position shown with dashed lines. It is of particular interest, however, that during this movement the double articulated lever 10 'performs a counterclockwise movement, the travel in function of the pivoting of the backrest being first relatively small and then increasing progressively with increasing pivoting.
  • FIG. 2 The embodiment of the chair according to FIG. 2 is similar to that of FIG. 1, but with the difference that instead of a double articulated lever 10 ', a guide curve 10 is provided for the arm 5 of the backrest support 4.
  • This guide curve is formed by the slot 10 in the seat support 1 and has the same function as the previously described double joint lever 10 '. In this slot runs a pin or cross pin 9 to which the lockable spring assembly 7 is also attached.
  • the slot 10 is arcuate.

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)
  • Plural Heterocyclic Compounds (AREA)

Abstract

The chair has a seat plate (2), which is mounted rotatably on the seat support (1) at the attachment point (3). The backrest support (4) is connected in an articulated manner by an arm (5), extending below the seat plate (2), on the one hand to the seat plate (2) and, on the other hand, by means of a double-jointed lever (10') also to the seat support (1). A gas spring (7), which can be arrested in any desired positions, acts on the backrest support (4) and has the tendency to bring it into the position drawn in continuous lines. When the chair is moved out of the latter position into the position drawn in dot/dashed lines, the seat plate (2) swivels only approximately half as far as the backrest support (4). In this case, it is essential that, despite the synchronous movement of the seat plate (2) and the backrest support (4), no effects arise which cause the shirt to be pulled out. The path of the gas spring increases progressively as a function of the rearward movement of the backrest, with the result that the force acting on the backrest due to the gas spring (7) is likewise greater with the increased inclination of the backrest. <IMAGE>

Description

Die Erfindung betrifft einen Arbeitsstuhl, insbesondere Bürostuhl, mit einem Sitzträger, einer Sitzplatte, die bei ihrem vorderen Ende an einer vorderen Anlenkstelle gelenkig am Sitzträger befestigt ist, einem schwenkbaren Rückenlehnenträger mit einem unter die Sitzplatte reichenden Arm, Mitteln zur Verstellung der Neigung der Sitzplatte in Abhängigkeit der Rückenlehnenträgerneigung und Mitteln zur Ausübung von Kraft auf die aus Sitzplatte, Rückenlehnenträger und den erstgenannten Mitteln gebildeten Mechanik, bzw. zur Arretierung von Sitzplatte und Rückenlehnenträger in der jeweils vom Benützer gewünschten Stellung.The invention relates to a work chair, in particular office chair, with a seat support, a seat plate which is articulated at its front end at a front articulation point on the seat support, a pivotable backrest support with an arm reaching under the seat plate, means for adjusting the inclination of the seat plate in Dependency of the inclination of the backrest support and means for exerting force on the mechanism formed from the seat plate, backrest support and the first-mentioned means, or for locking the seat plate and backrest support in the position desired by the user.

Derartige Arbeitsstühle werden als Synchron-Arbeitsstühle bezeichnet, weil die Verstellung der Neigung des Rückenlehnenträgers eine gleichzeitige Verstellung der Neigung der Sitzplatte bewirkt. Bekannte Synchron-Arbeitsstühle dieser Art haben ein arretierbares Federaggregat, z.B. eine Gasfeder, um die Sitzplatte und den Rückenlehnenträger in der gewünschten Stellung zu arretieren. Wenn das Federaggregat nicht arretiert ist, kann der Benützer des Arbeitsstuhls wippen, d.h. die beiden Neigungen je nach der durchzuführender; Arbeit stetig verändern. Der Benützer kann aber auch die Arretierung bloss kurzzeitig lösen und eine Bewegung vornehmen, bis er die für ihn bequemste Lage erreicht hat, worauf er dann den Stuhl in dieser Stellung arretieren kann.Such work chairs are called synchronous work chairs because the adjustment of the inclination of the backrest support causes a simultaneous adjustment of the inclination of the seat plate. Known synchronous work chairs of this type have a lockable spring unit, for example a gas spring, to lock the seat plate and the backrest support in the desired position. If the Federag g regat is not locked, the user of the work chair can rock, ie the two inclinations depending on the one to be carried out; Change work constantly. However, the user can only release the lock briefly and make a movement until he has reached the most comfortable position, after which he can then lock the chair in this position.

Bei den meisten Synchron-Arbeitsstühlen ist zwischen Sitzplatte, Rückenlehnenträger und arretierbarem Federaggregat ein komplizierter Hebelmechanismus vorgesehen, um die ge-wünschte Abhängigkeit der Neigung der Sitzplatte von der Neigung des Rückenlehnenträgers zu erreichen. Dieser Mechanismus erfordert nicht nur einen beträchtlichen Herstellungsaufwand, sondern besitzt auch einen nicht unbeträchtlichen Raumbedarf, so dass es nicht einfach ist, diesen Mechanismus unterhalb der Sitzplatte unterzubringen. Die Vielzahl der Gelenke zwischen den einzelnen Hebeln hat auch den Nachteil, dass sich die Effekte der Abnutzung der verschiedenen Gelenke zu addieren pflegen. Infolgedessen bleibt der Mechanismus auf die Dauer gesehen nicht starr, sondern es tritt infolge des Ausschlagens der Gelenkstellen eine gewisse Lotterigkeit auf. Diese Lotterigkeit führt unter anderem auch zu unerwünschten Geräuschentwicklungen, die nicht nur beim Wippen, sondern auch bei der Benutzung des Arbeitsstuhls im arretierten Zustand auftreten.In most synchronous working chairs of a complicated lever mechanism is provided between the seat plate and the backrest support and lockable Federa gg Regat provided desired e-g to the function of the inclination of the seat plate to achieve the inclination of the backrest support. This mechanism not only requires considerable manufacturing effort, but also has a not inconsiderable space requirement, so that it is not easy to accommodate this mechanism below the seat plate. The large number of joints between the individual levers also has the disadvantage that the effects of wear on the various joints tend to add up. As a result, the mechanism does not remain rigid in the long run, but a certain amount of looseness occurs as a result of the articulation of the joints. This looseness leads, among other things, to undesirable noise developments that occur not only when rocking, but also when the work chair is locked.

In der CH-PS 529 539 ist ein Arbeitsstuhl beschrieben, bei dem sowohl die Sitzplatte als auch der Rückenlehnenträger, welcher einen unter die Sitzplatte reichenden Alenkarm aufweist, am Sitzträger befestigt sind. Zur Verstellung der Neigung der Sitzplatte in Abhängigkeit zur Neigung des Rückenlehnenträgers ist ein Doppelgelenkhebel vorgesehen, welcher die Sitzplatte in einem Abstand von der Anlenkstelle des Rückenlehnenträgerarms mit dem Sitzträger verbindet. Eine Gasfeder dient sowohl zur Ausübung von Kraft auf die aus Sitzplatte, Rückenlehnenträger und Doppelgelenkhebel gebildeten Mechanik als auch zur Arretierung von Sitzplatte und Rückenlehnenträger in der jeweils vom Benützer gewünschten Stellung. Die Gasfeder ist praktisch senkrecht zur Sitzplatte angeordnet. Diese Ausbildung des Arbeitsstuhls ist relativ einfach, hat aber insbesondere den gewichtigen Nachteil, dass bei der Sitzverstellung eine relativ grosse Relativbewegung zwischen der Rückenlehne und dem Rücken der Person bewirkt wird, welche zur Folge haben kann, dass der betreffenden Person im Rückenbereich das Hemd aus der Hose herausgezogen wird. Man spricht von einem sogenannten Hemdauszieheffekt. Die relativ grosse Relativbewegung hat ihre Hauptursache darin, dass die Drehachse des Rückenlehnenträgers stationär bleibt, währenddem sich der Standort des Hüftgelenks des Stuhlbenützers, also die Drehachse für den Körper, zusammen mit der Sitzplatte aufwärts und abwärts bewegt. Da Gasfedern eine relativ flache Federcharakteristik besitzen, besteht ferner der Nachteil, dass, wenn sich der Benützer mit der Rückenlehne nach hinten bewegt, das Gewicht des Benützers durch die Kraft der Gasfeder zu wenig kompensiert wird.In CH-PS 529 539 a work chair is described in which both the seat plate and the backrest support, which has an aluminum arm reaching under the seat plate, are attached to the seat support. To adjust the inclination of the seat plate depending on the inclination of the backrest support, a double-articulated lever is provided which connects the seat plate to the seat support at a distance from the articulation point of the backrest support arm. A gas spring serves both to exert force on the mechanism formed by the seat plate, backrest support and double-joint lever and to lock the seat plate and backrest support in the position desired by the user. The gas spring is arranged practically perpendicular to the seat plate. This training work Chair is relatively simple, but it has the major disadvantage that a relatively large relative movement between the backrest and the back of the person is caused when the seat is adjusted, which can result in the person in question taking his shirt out of his pants in the back area . One speaks of a so-called shirt pull-out effect. The relatively large relative movement is mainly due to the fact that the axis of rotation of the backrest support remains stationary, while the location of the hip joint of the chair user, i.e. the axis of rotation for the body, moves up and down together with the seat plate. Since gas springs have a relatively flat spring characteristic, there is also the disadvantage that if the user moves backwards with the backrest, the weight of the user is not compensated enough by the force of the gas spring.

Um das Problem des Hemdauszieheffekts zu vermeiden, sind bereits Einrichtungen bekannt geworden, bei denen mittels eines an einem Schlitten befestigten Seilzuges die Rückenlehne bei der Sitzbewegung um einen bestimmten Betrag nach oben oder nach unten bewegt wird, um eine Relativbewegung zwischen dem Rücken der Person und der Rückenlehne zu verhindern. Eine solche Mechanik ist jedoch relativ teuer und zudem auch störungsanfällig.In order to avoid the problem of the shirt pull-out effect, devices have already become known in which the backrest is moved up or down by a certain amount during the seat movement by means of a cable attached to a slide, in order to achieve a relative movement between the back of the person and the person To prevent backrest. However, such a mechanism is relatively expensive and also prone to failure.

Es ist daher Aufgabe der vorliegenden Erfindung, die vorgenannten Nachteile bei Synchron-Arbeitsstühlen zu vermeiden.It is therefore an object of the present invention to avoid the aforementioned disadvantages in synchronous work chairs.

Diese Aufgabe wird ausgehend von einem Arbeitsstuhl der eingangs erwähnten Art dadurch gelöst, dass der Arm des Rückenlehnenträgers unten oder seitlich an der Sitzplatte gelenkig gelagert ist, dass die Mittel zur Verstellung der Neigung der Sitzplatte in Abhängigkeit der Rückenlehnenträgerneigung entweder durch einen Doppelgelenkhebel, der mit einem Gelenk am Arm des Rückenlehnenträgers und mit dem anderen Gelenk am Sitzträger angelenkt ist, oder durch eine Führungskurve für den Arm des Rückenlehnenträgers gebildet werden. Da der Rückenlehnenträger nicht am Sitzträger, sondern unten in der Nähe des Hüftgelenks des Stuhlbenützers an der Sitzplatte befestigt ist, wird bei der Sitzverstellung eine Relativbewegung zwischen der Rückenlehne und dem Rücken des Stuhlbenützers praktisch vermieden. Im Gegensatz zum bekannten Stand der Technik verändert sich bei einer Veränderung der Neigung der Sitzplatte der Drehpunkt des Rückenlehnenträgers nicht mehr in Bezug auf das Hüftgelenk des Benützers. Durch den Doppelgelenkhebel oder die Führungskurve wird aber trotzdem auf äusserst einfache Weise mit minimalem Aufwand bei einer Neigungsbewegung des Rückenlehnenträgers auch eine Neigungsbewegung der Sitzplatte erzielt, wie dies bei Synchronstühlen üblich ist.Starting from a work chair of the type mentioned at the outset, this object is achieved in that the arm of the backrest support is articulated at the bottom or on the side of the seat plate, that the means for adjusting the The inclination of the seat plate depending on the inclination of the backrest support is either formed by a double articulated lever which is articulated on the arm of the backrest support and with the other articulation on the seat support, or by a guide curve for the arm of the backrest support. Since the backrest support is not attached to the seat support but to the seat plate near the hip joint of the chair user, a relative movement between the backrest and the back of the chair user is practically avoided when the seat is adjusted. In contrast to the known prior art, when the inclination of the seat plate changes, the pivot point of the backrest support no longer changes in relation to the hip joint of the user. By means of the double articulated lever or the guide curve, an inclination movement of the seat plate is nevertheless achieved in an extremely simple manner with minimal effort with an inclination movement of the backrest support, as is usual with synchronous chairs.

Wie bereits festgestellt wurde, ist es möglich, statt einen Doppelgelenkhebel auch andere Mittel, z.B. eine Führungskurve, für den Arm des Rückenlehnenträgers vorzusehen. Diese Führungskurve kann durch einen Schlitz im Sitzträger gebildet werden, in welchen ein am Arm des Rückenlehnenträgers angeordneter Querbolzen läuft. Dies ergibt eine besonders zweckmässige und einfache Konstruktion. Zweckmässigerweise sind die Mittel zur Ausübung von Kraft und zur Arretierung von Sitzplatte und Rückenlehnenträger durch ein arretierbares Federaggregat, z.B. eine Gasfeder, gebildet. Solche Federaggregate sind relativ kostengünstig und erfüllen eine Doppelfunktion, indem sie sowohl eine Federkraft liefern als auch eine Arretierung des Stuhls ermöglichen. Es ist aber auch möglich, separate Mittel zur Arretierung und zur Erzeugung der notwendigen Federkraft vorzusehen.As already stated, it is possible to provide other means, for example a guide curve, for the arm of the backrest support instead of a double articulated lever. This guide curve can be formed by a slot in the seat support in which a cross bolt arranged on the arm of the backrest support runs. This results in a particularly practical and simple construction. The means for exerting force and for locking the seat plate and backrest support are expediently formed by a lockable spring unit, for example a gas spring. Such spring assemblies are relatively inexpensive and fulfill a double function in that they both provide spring force and enable the chair to be locked. But it is also possible to provide separate means for locking and for generating the necessary spring force.

Vorteilhaft ist ein Ende des arretierbaren Federaggregats an einer Anlenkstelle des Arms des Rückenlehnenträgers und das andere Ende an einer Anlenkstelle am Sitzträger verschwenkbar befestigt. Die Anordnung der Anlenkstellen erfolgt dabei vorteilhaft so, dass der Federweg des Federaggregats in Bezug auf die Verschwenkung des Rückenlehnenträgers nach hinten progressiv zunimmt. Dies hat den Vorteil, dass der erhöhten Kraft, welche der nach hinten neigende Benützer auf die Rückenlehne ausübt, eine entsprechend hohe Gegenkraft entgegen wirkt.One end of the lockable spring assembly is advantageously pivotally attached to a pivot point of the arm of the backrest support and the other end to a pivot point on the seat carrier. The arrangement of the articulation points is advantageously such that the spring travel of the spring assembly increases progressively with respect to the pivoting of the backrest support to the rear. This has the advantage that a correspondingly high counterforce counteracts the increased force exerted by the user tending backwards on the backrest.

Vorteilhaft haben Doppelgelenkhebel und Federaggregat eine gemeinsame Anlenkstelle. Dadurch wird die Konstruktion vereinfacht. Zweckmässigerweise liegen in der vordersten Stellung des Rückenlehnenträgers die Gelenke des Doppelgelenkhebels und der Anlenkstellen des Federaggregats praktisch auf einer Linie. Durch diese Anordnung wird auf einfache Weise erreicht, dass der Federweg des Federaggregats in Bezug auf die Verschwenkung der Rückenlehne nach hinten progressiv zunimmt.The double articulated lever and spring assembly advantageously have a common articulation point. This simplifies the construction. Appropriately, in the foremost position of the backrest support, the joints of the double articulated lever and the articulation points of the spring assembly are practically in line. This arrangement ensures that the spring travel of the spring assembly increases progressively with respect to the pivoting of the backrest to the rear.

Ausführungsbeispiele der Erfindung werden nun unter Bezugnahme auf die Zeichnung beschrieben. Es zeigt:

  • Fig. 1 ein erstes Ausführungsbeispiel eines Arbeitsstuhls mit einem Doppelgelenkhebel zur Verbindung von Rückenlehnenträger und Sitzträger und
  • Fig. 2 einen Arbeitsstuhl wie in Figur 1, wobei jedoch der Doppelgelenkhebel durch eine Kurve in Form eines Schlitzes ersetzt ist.
Embodiments of the invention will now be described with reference to the drawing. It shows:
  • Fig. 1 shows a first embodiment of a work chair with a double joint lever for connecting the backrest support and seat support and
  • Fig. 2 shows a work chair as in Figure 1, however, the double articulated lever is replaced by a curve in the form of a slot.

Beim Stuhl gemäss Figur 1 wird die Lage der Sitzplatte 2 und des Rückenlehnenträgers 4 in beiden Endstellungen dargestellt. Der Sitzträger 1 wird in üblicher Weise von einem Fusskreuz mit Standrohr und Höhenlift getragen. Diese Teile sind aber in der Zeichnung nicht dargestellt. Die Sitzplatte 2 ist im Bereich ihres vorderen Endes mittels einer elastischen Verbindungsplatte 3 schwenkbar auf dem Sitzträger 1 gelagert. Die Verbindungplatte 3 bildet also die vordere Anlenkstelle. Es wäre aber möglich, auch andere Mittel zur Anlenkung, z.B. einen Gelenkzapfen, vorzusehen. Der Rückenlehnenträger 4 ist mit einem nach unten unter die Sitzplatte 2 ragenden Arm versehen, der im hinteren Bereich der Sitzplatte 2, also ganz in der Nähe wo sich normalerweise das Hüftgelenk des Benützers befindet, gelenkig mit der Sitzplatte 2 verbunden. Es wäre aber auch möglich, die Anlenkung des Rückenlehnenträgers auf beiden Seiten auf der Höhe des Hüftgelenks vorzunehmen. Bei einer Bewegung der Sitzplatte 2 nach oben oder nach unten wird auch die Schwenkachse 6 mitbewegt, so dass der Standort der Schwenkachse 6 in Bezug auf das Hüftgelenk des Benützers nicht geändert wird. Ein Doppelgelenkhebel 10' verbindet den Arm 5 mit dem Sitzträger 1 in solcher Weise, dass bei einer Bewegung des Rückenlehnenträgers 4 nach hinten die Sitzplatte 2 nach unten geneigt wird. Die Bezugsziffern 9 und 11 bezeichnen die Gelenke des Doppelgelenkhebels 10'. Als Gelenk 9 kann ein Querbolzen dienen, der sich von einer Seite des Stuhls zur anderen erstreckt. Ein arretierbares Federaggregat 7 ist mit einem Ende über ein Gelenk 8 gelenkig mit dem Sitzträger 1 und mit dem anderen Ende mit dem Arm 5 des Rückenlehnenträgers 4 verbunden. Das arretierbare Federaggregat kann von jeder beliebigen Bauart sein, sei es mechanisch, hydraulisch, pneumatisch oder in jeder beliebigen Kombination dieser Arbeitsweisen. Es wäre aber auch möglich, eine separate Arretiervorrichtung und eine separate Feder vorzusehen. Wenn als Gelenk 9 ein Querbolzen dient, ist es zweckmässig, diesen Querbolzen 9 auch zur Anlenkung des arretierbaren Federaggregats, also beispielsweise einer Gasfeder 7, zu verwenden.In the chair according to Figure 1, the position of the seat plate 2 and the backrest support 4 is shown in both end positions. The seat support 1 is carried in the usual manner by a base with a standpipe and a height lift. However, these parts are not shown in the drawing. The seat plate 2 is pivotally mounted on the seat support 1 in the region of its front end by means of an elastic connecting plate 3. The connecting plate 3 thus forms the front articulation point. However, it would also be possible to provide other means of articulation, for example a pivot pin. The backrest support 4 is provided with an arm projecting downwards under the seat plate 2, which is articulatedly connected to the seat plate 2 in the rear region of the seat plate 2, that is to say very close to where the user's hip joint is normally located. But it would also be possible to carry out the articulation of the backrest support on both sides at the level of the hip joint. When the seat plate 2 moves up or down, the pivot axis 6 is also moved, so that the location of the pivot axis 6 with respect to the hip joint of the user is not changed. A double articulated lever 10 'connects the arm 5 to the seat support 1 in such a way that when the backrest support 4 moves backwards, the seat plate 2 is inclined downward. The reference numerals 9 and 11 denote the joints of the double joint lever 10 '. A cross bolt can be used as the joint 9, which extends from one side of the chair to the other. A lockable spring unit 7 is connected at one end via a joint 8 to the seat support 1 and at the other end to the arm 5 of the backrest support 4. The lockable spring unit can be of any type, be it mechanical, hydraulic, pneumatic or in any combination of these working methods. But it would also be possible to provide a separate locking device and a separate spring. If a cross pin is used as the joint 9, it is expedient to use this cross pin 9 also for articulating the lockable spring assembly, for example a gas spring 7.

Die Zeichnung lässt ohne nähere Erläuterung erkennen, wie sich die einzelnen Teile von der mit ausgezogenen Linien dargestellten, am wenigsten geneigten Lage, in die mit gestrichelten Linien dargestellten, am stärksten geneigte Lage, bewegen. Es ist aber von besonderem Interesse, dass bei dieser Bewegung der Doppelgelenkhebel 10' eine Bewegung im Gegenuhrzeigersinn durchführt, wobei der Federweg in Funktion der Verschwenkung der Rückenlehne zuerst relativ klein ist und dann mit zunehmender Verschwenkung progressiv zunimmt.The drawing shows, without further explanation, how the individual parts move from the least inclined position shown with solid lines to the most inclined position shown with dashed lines. It is of particular interest, however, that during this movement the double articulated lever 10 'performs a counterclockwise movement, the travel in function of the pivoting of the backrest being first relatively small and then increasing progressively with increasing pivoting.

Die Ausführungsform des Stuhls gemäss Figur 2 ist ähnlich wie jene von Figur 1, jedoch mit dem Unterschied, dass anstelle eines Doppelgelenkhebels 10' eine Führungskurve 10 für den Arm 5 des Rückenlehnenträgers 4 vorgesehen ist. Diese Führungskurve wird durch den Schlitz 10 im Sitzträger 1 gebildet und hat die gleiche Funktion wie der vorher beschriebene Doppelgelenkhebel 10'. In diesem Schlitz läuft ein Zapfen oder Querbolzen 9, an dem auch das arretierbare Federaggregat 7 befestigt ist.The embodiment of the chair according to FIG. 2 is similar to that of FIG. 1, but with the difference that instead of a double articulated lever 10 ', a guide curve 10 is provided for the arm 5 of the backrest support 4. This guide curve is formed by the slot 10 in the seat support 1 and has the same function as the previously described double joint lever 10 '. In this slot runs a pin or cross pin 9 to which the lockable spring assembly 7 is also attached.

Beim gezeigten Ausführungsbeispiel ist der Schlitz 10 bogenförmig.In the embodiment shown, the slot 10 is arcuate.

Claims (8)

I. Arbeitsstuhl, insbesondere Bürostuhl, mit einem Sitzträger (1), einer Sitzplatte (2), die bei ihrem vorderen Ende an einer vorderen Anlenkstelle (3) gelenkig am Sitzträger (1) befestigt ist, einem schwenkbaren Rückenlehnenträger (4) mit einem unter die Sitzplatte (2) reichenden Arm (5), Mitteln .(10, 10') zur Verstellung der Neigung der Sitzplatte (2) in Abhängigkeit der Rückenlehnenträgerneigung und Mitteln zur Ausübung von Kraft auf die aus Sitzplatte (2), Rückenlehnenträger (4) und den erstgenannten Mitteln (10, 10') gebildeten Mechanik bzw. -zur Arretierung von Sitzplatte (2) und Rückenlehnenträger (4) in der jeweils vom Benützer gewünschten Stellung, dadurch gekennzeichnet, dass der Arm (5) des Rückenlehnenträgers (4) unten (6) oder seitlich an der Sitzplatte gelenkig gelagert ist, und dass die Mittel (10, 10') zur Verstellung der Neigung des Rückenlehnenträgers (4) zur Sitzplatte (2) nach Massgabe der Sitz= plattenneigung, entweder durch einen Doppelgelenkhebel (10'), der mit einem Gelenk (9) am Arm (5) des Rückenlehnenträgers (4) und mit dem anderen Gelenk (11) am Sitzträger (1) angelenkt ist, oder durch eine Führungskurve (10) für den Arm (5) des Rückenlehnenträgers (4) gebildet werden.I. work chair, in particular office chair, with a seat support (1), a seat plate (2) which is articulated to the seat support (1) at its front end at a front articulation point (3), a pivotable backrest support (4) with an under the arm (5) reaching the seat plate (2), means (10, 10 ') for adjusting the inclination of the seat plate (2) depending on the inclination of the backrest support and means for exerting force on the seat plate (2), backrest support (4) and the first-mentioned means (10, 10 ') formed mechanics or for locking the seat plate (2) and backrest support (4) in the position desired by the user, characterized in that the arm (5) of the backrest support (4) below (6) or is articulated laterally on the seat plate, and that the means (10, 10 ') for adjusting the inclination of the backrest support (4) to the seat plate (2) in accordance with the seat = plate inclination, either by means of a double articulated lever (10' ), the one with one joint (9) is articulated on the arm (5) of the backrest support (4) and with the other joint (11) on the seat support (1), or is formed by a guide curve (10) for the arm (5) of the backrest support (4) will. 2. Arbeitsstuhl nach Anspruch 1, dadurch gekennzeichnet, dass die Führungskurve (10) durch einen Schlitz (10) im Sitzträger (1) gebildet ist, in welchem ein am Arm (5) des Rückenlehnenträgers (4) angeordneter Zapfen oder Querbolzen (9) läuft.2. Work chair according to claim 1, characterized in that the guide curve (10) is formed by a slot (10) in the seat support (1), in which a pin or cross bolt (9) arranged on the arm (5) of the backrest support (4) running. 3. Arbeitsstuhl nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Mittel (7) zur Ausübung von Kraft und zur Arretierung von Sitzplatte (2) und Rückenlehnenträger (4) durch ein arretierbares Federaggregat (7), z.B. eine Gasfeder, gebildet sind.3. Work chair according to claim 1 or 2, characterized in that the means (7) for exerting force and for locking the seat plate (2) and backrest support (4) by a lockable spring unit (7), e.g. a gas spring are formed. 4. Arbeitsstuhl nach Anspruch 3, dadurch gekennzeichnet, dass ein Ende des arretierbaren Federaggregats (7) an einer Anlenkstelle (9) des Arms (5) des Rückenlehnenträgers (4) und das andere Ende an einer Anlenkstelle (8) am Sitzträger (1) verschwenkbar befestigt sind.4. Work chair according to claim 3, characterized in that one end of the lockable spring assembly (7) at a pivot point (9) of the arm (5) of the backrest support (4) and the other end at a pivot point (8) on the seat support (1) are pivotally attached. 5. Arbeitsstuhl nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Anordnung der Anlenkstellen (8, 9) des Federaggregats (7) derart ist, dass der Federweg des Federaggregats als Funktion der Verschwenkung des Rückenlehnenträgers (4) nach hinten progressiv zunimmt.5. Work chair according to one of claims 1 to 4, characterized in that the arrangement of the articulation points (8, 9) of the spring assembly (7) is such that the spring travel of the spring assembly increases progressively as a function of the pivoting of the backrest support (4) to the rear . 6. Arbeitsstuhl nach Anspruch 5, dadurch gekennzeichnet, dass Doppelgelenkhebel (10') und Federaggregat (7) eine gemeinsame Anlenkstelle (9) besitzen.6. Work chair according to claim 5, characterized in that the double articulated lever (10 ') and spring unit (7) have a common articulation point (9). 7. Arbeitsstuhl nach Anspruch 6, dadurch gekennzeichnet, dass in der vordersten Stellung des Rückenlehnenträgers (4) die Gelenke (9, 11) des Doppelgelenkhebels und die Anlenkstellen (9, 8) des Federaggregats (7) praktisch auf einer Linie liegen.7. Working chair according to claim 6, characterized in that in the foremost position of the backrest support (4) the joints (9, 11) of the double articulated lever and the articulation points (9, 8) of the spring assembly (7) are practically in line. 8. Arbeitsstuhl nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, dass der Schlitz (10) eine bogenförmig gekrümmte Formgebung aufweist.8. Work chair according to one of claims 2 to 7, characterized in that the slot (10) has an arcuately curved shape.
EP84113009A 1983-05-06 1984-10-29 Office chair Expired - Lifetime EP0179933B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE19833316533 DE3316533A1 (en) 1983-05-06 1983-05-06 WORK CHAIR, ESPECIALLY OFFICE CHAIR
CH2503/83A CH659179A5 (en) 1983-05-06 1983-05-06 Working chair, especially an office chair
DE8484113009T DE3484777D1 (en) 1983-05-06 1984-10-29 WORK CHAIR, ESPECIALLY OFFICE CHAIR.
EP84113009A EP0179933B1 (en) 1983-05-06 1984-10-29 Office chair
AT84113009T ATE64838T1 (en) 1983-05-06 1984-10-29 WORK CHAIR, ESPECIALLY OFFICE CHAIR.
US06/667,278 US4682814A (en) 1983-05-06 1984-11-01 Tilting seat and back chair, particularly tilting desk chair

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19833316533 DE3316533A1 (en) 1983-05-06 1983-05-06 WORK CHAIR, ESPECIALLY OFFICE CHAIR
CH2503/83A CH659179A5 (en) 1983-05-06 1983-05-06 Working chair, especially an office chair
EP84113009A EP0179933B1 (en) 1983-05-06 1984-10-29 Office chair
US06/667,278 US4682814A (en) 1983-05-06 1984-11-01 Tilting seat and back chair, particularly tilting desk chair

Publications (2)

Publication Number Publication Date
EP0179933A1 true EP0179933A1 (en) 1986-05-07
EP0179933B1 EP0179933B1 (en) 1991-07-03

Family

ID=42307787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84113009A Expired - Lifetime EP0179933B1 (en) 1983-05-06 1984-10-29 Office chair

Country Status (5)

Country Link
US (1) US4682814A (en)
EP (1) EP0179933B1 (en)
AT (1) ATE64838T1 (en)
CH (1) CH659179A5 (en)
DE (2) DE3316533A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0281845A1 (en) * 1987-02-25 1988-09-14 Köhl Gmbh Swivel chair or seat with synchronized inclination of backrest and seat
DE3900220A1 (en) * 1989-01-05 1990-07-12 Wilkhahn Wilkening & Hahne CHAIR
WO1992004844A1 (en) * 1990-09-14 1992-04-02 Karl Schreckenberg A chair
WO1992007490A1 (en) * 1990-10-25 1992-05-14 Martin Stoll Gmbh Chair
US5280998A (en) * 1991-03-01 1994-01-25 Miotto & Associates International Limited S.R.L. Mechanical device, particularly for the movement and selective locking of a chair
US5348371A (en) * 1989-12-14 1994-09-20 Shepherd Products U.S., Inc. Mechanical device for use particularly for the synchronous movement of the seat and backrest of a chair
US9504327B2 (en) * 2015-02-09 2016-11-29 Harmony Lifestyle, LLC Reclinable chair having a locking gas spring reclining back rest

Families Citing this family (62)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3316533A1 (en) * 1983-05-06 1984-11-08 Provenda Marketing AG, Herisau WORK CHAIR, ESPECIALLY OFFICE CHAIR
FR2567733B1 (en) * 1984-07-18 1987-01-02 Allibert Sa REST SEAT
FR2574644A2 (en) * 1984-11-21 1986-06-20 Lemaire Jeannine TRANSFORMABLE SEAT
DE3521488A1 (en) * 1985-06-14 1986-12-18 August Fröscher GmbH & Co KG, 7141 Steinheim WORK CHAIR
DE3527785A1 (en) * 1985-08-02 1987-02-12 Froescher August Gmbh Co Kg SUPPORT AND ADJUSTMENT FOR SEAT AND BACKREST ON A WORK CHAIR
CH668541A5 (en) * 1986-01-07 1989-01-13 Provenda Marketing Ag WORK CHAIR, ESPECIALLY FOR USE AS OFFICE CHAIR.
US5567012A (en) * 1986-04-10 1996-10-22 Steelcase, Inc. Chair control
US4744603A (en) * 1986-04-10 1988-05-17 Steelcase Inc. Chair shell with selective back stiffening
DE3616475C1 (en) * 1986-05-15 1987-06-11 Kusch Co Sitzmoebel Height-adjustable swivel chair equipped with gas pressure spring, in particular office chair or armchair
DE3617623A1 (en) * 1986-05-26 1987-12-03 Drabert Soehne CHAIR
DE8617738U1 (en) * 1986-07-03 1988-03-10 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart, De
DE3629882A1 (en) * 1986-09-02 1988-03-10 Girsberger Holding Ag SECURITY LOCK
CH670363A5 (en) * 1986-09-24 1989-06-15 Giroflex Entwicklungs Ag
NL8602506A (en) * 1986-10-06 1988-05-02 Ahrend Groep Nv CHAIR WITH MOVABLE SEAT AND BACKREST.
DE3700447A1 (en) * 1987-01-09 1988-07-21 Vogt Bueromoebel SEAT FURNITURE
US4796950A (en) * 1987-02-09 1989-01-10 Haworth, Inc. Tilt mechanism, particularly for knee-tilt chair
ES2024047B3 (en) * 1987-07-24 1992-02-16 Equus Marketing Ag CHAIR, ESPECIALLY OFFICE CHAIR OR WORK CHAIR
DE3727784A1 (en) * 1987-08-20 1989-03-02 Kloeber Gmbh & Co WORK CHAIR WITH SWIVELING SEAT SHELL
JPH0511791Y2 (en) * 1987-08-24 1993-03-24
DE3741472A1 (en) * 1987-12-08 1989-06-22 Simon Desanta CHAIR
US4786105A (en) * 1988-02-24 1988-11-22 All Day Chair Company Continually positionable chair with adjustable lumbar support
US4979778A (en) * 1989-01-17 1990-12-25 Brayton International, Inc. Synchrotilt chair
US4906045A (en) * 1989-03-20 1990-03-06 The Shaw-Walker Company Chair control for a pedestal chair having a knee-tilt seat
US4913492A (en) * 1989-04-03 1990-04-03 Sears Manufacturing Company Recliner for vehicle seat
US5263767A (en) * 1990-02-28 1993-11-23 Svein Asbjornsen Adjustable chair
US5288138A (en) * 1990-08-10 1994-02-22 Stulik Edward L Reclining chair
IE66531B1 (en) * 1991-05-21 1996-01-24 Ashfield Eng Co Wexford Ltd A chair tilting mechanism
US5344215A (en) * 1993-03-10 1994-09-06 Milsco Manufacturing Company Backrest recliner mechanism
WO1994028768A1 (en) * 1993-06-11 1994-12-22 Philip Louis Peach A chair
US5618016A (en) * 1994-09-02 1997-04-08 Thomas A. Garland Swing linkage
US5782536A (en) * 1995-02-17 1998-07-21 Steelcase Inc. Modular chair construction and method of assembly
US5765914A (en) * 1995-06-07 1998-06-16 Herman Miller, Inc. Chair with a tilt control mechanism
US5725276A (en) * 1995-06-07 1998-03-10 Ginat; Jonathan Tilt back chair and control
US5603551A (en) * 1996-01-16 1997-02-18 Sheehan; Kelly Gravitational resistant positional chair
US5918935A (en) * 1997-06-03 1999-07-06 Stulik; Edward L. Reclining chair
US6086153A (en) 1997-10-24 2000-07-11 Steelcase Inc. Chair with reclineable back and adjustable energy mechanism
IT1296483B1 (en) * 1997-11-21 1999-06-25 Compact S R L MOTORIZED ARMCHAIR WITH PERFECTED STRUCTURE
CA2302063C (en) * 2000-03-23 2010-08-17 Cke Technologies Inc. Ergonomic chair
US6729688B2 (en) 2000-03-24 2004-05-04 Giroflex-Entwicklungs-Ag Seat and backseat assembly for seating, in particular office chairs
MXPA02005951A (en) * 2000-10-16 2003-10-14 Kokuyo Kk Chair.
US6609755B2 (en) * 2001-06-15 2003-08-26 Hon Technology Inc. Ergonomic chair
US20030132653A1 (en) * 2001-10-18 2003-07-17 Doug Thole Tension control mechanism for a chair
US7566099B2 (en) * 2003-10-22 2009-07-28 Lord Corporation Furniture seatback tilt recline angle limiter and method
US6969116B2 (en) * 2003-12-30 2005-11-29 Hni Technologies Inc. Chair with backward and forward passive tilt capabilities
DE102004007095A1 (en) * 2004-02-13 2005-08-25 Interstuhl Büromöbel GmbH & Co. KG Office chair is mounted on support with curved upper surface, pneumatic spring moving support to reclining position and pneumatic lines connecting spring to cylinders which move slides attached to back rest
HK1064859A2 (en) * 2004-06-21 2005-01-14 Yu Yeung Tin Synchronous coordinate system of back of chair.
AU2008210726B2 (en) 2007-01-29 2014-07-24 MillerKnoll, Inc Seating structure and methods for the use thereof
DE502008002234D1 (en) * 2007-07-07 2011-02-17 Koenig & Neurath Ag CHAIR, ESPECIALLY OFFICE CHAIR
US20110304192A1 (en) * 2010-06-15 2011-12-15 Augustat Betty A Ergometric Chair Apparatus
US9706845B2 (en) 2012-09-20 2017-07-18 Steelcase Inc. Chair assembly
US11304528B2 (en) 2012-09-20 2022-04-19 Steelcase Inc. Chair assembly with upholstery covering
USD697726S1 (en) 2012-09-20 2014-01-21 Steelcase Inc. Chair
WO2015161281A1 (en) 2014-04-17 2015-10-22 Hni Technologies Inc. Chair and chair control assemblies, systems, and methods
NO339052B1 (en) * 2014-10-27 2016-11-07 Sykkylven Staal As Seating furniture arrangement
EP3282899B1 (en) 2015-04-13 2021-11-03 Steelcase Inc. Seating arrangement
US10194750B2 (en) 2015-04-13 2019-02-05 Steelcase Inc. Seating arrangement
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
US10966527B2 (en) 2017-06-09 2021-04-06 Steelcase Inc. Seating arrangement and method of construction
US11253077B2 (en) * 2016-12-21 2022-02-22 Kokuyo Co., Ltd. Chair with return force mechanism
US11589678B2 (en) 2019-01-17 2023-02-28 Hni Technologies Inc. Chairs including flexible frames
US11596232B2 (en) 2019-04-16 2023-03-07 MillerKnoll, Inc. Chair for active engagement of user
CN112043102B (en) * 2020-09-07 2022-02-18 星威国际家居股份有限公司 Quick-dismantling high-support-stability chair

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH524982A (en) * 1970-05-20 1972-07-15 Stella Werke Ag Work chair
CH529537A (en) * 1970-09-28 1972-10-31 Stella Werke Ag Work chair
DE8417429U1 (en) * 1984-06-08 1984-09-20 Hansen, Eckard, 9430 St. Margrethen Point synchronous adjustment device for office chairs
DE3316533A1 (en) * 1983-05-06 1984-11-08 Provenda Marketing AG, Herisau WORK CHAIR, ESPECIALLY OFFICE CHAIR

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA558309A (en) * 1958-06-03 G. Roth Robert Inhibition of polymerization of vinyl chloride
US2471024A (en) * 1946-10-04 1949-05-24 Roy A Cramer Chair with tilting back and automatically shiftable seat
GB794138A (en) * 1955-12-20 1958-04-30 Res Interests Ltd Improvements in or relating to reclining chairs
US2859799A (en) * 1956-05-03 1958-11-11 Edwin R Moore Functional posture controller for chairs
US3913975A (en) * 1972-01-26 1975-10-21 Seats Inc Suspension seat
DE2335586A1 (en) * 1973-01-29 1975-01-30 Fritz Kerstholt SITTING AND / OR Lounging furniture with moveable back
DE7631908U1 (en) * 1976-10-13 1978-04-13 Moll, Reiner, 7070 Schwaebisch Gmuend ARMCHAIR
DE7724774U1 (en) * 1977-08-10 1977-12-15 Felix Fiand Gmbh, 5450 Neuwied SEATING FURNITURE
US4143910A (en) * 1977-09-12 1979-03-13 Klaus Geffers Chair having synchronously coupled tiltable seat and back rest
DE2757349A1 (en) * 1977-12-22 1979-07-05 Simon Klinksiek Swivel chair with infinitely adjustable seat and backrest - has gas compression spring and support plate beneath seat body
DE2843058A1 (en) * 1978-10-03 1980-04-24 Kloeber Kg Adjustment mechanism for reclining seats - includes height adjustment for backrest to reduce relative movement between seat and rest
CH645795A5 (en) * 1979-07-23 1984-10-31 Drabert Soehne Chair, in particular visual display unit chair
GB2125284B (en) * 1982-08-16 1985-08-07 Metalstand Co Adjustable chairs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH524982A (en) * 1970-05-20 1972-07-15 Stella Werke Ag Work chair
CH529537A (en) * 1970-09-28 1972-10-31 Stella Werke Ag Work chair
DE3316533A1 (en) * 1983-05-06 1984-11-08 Provenda Marketing AG, Herisau WORK CHAIR, ESPECIALLY OFFICE CHAIR
DE8417429U1 (en) * 1984-06-08 1984-09-20 Hansen, Eckard, 9430 St. Margrethen Point synchronous adjustment device for office chairs

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0281845A1 (en) * 1987-02-25 1988-09-14 Köhl Gmbh Swivel chair or seat with synchronized inclination of backrest and seat
DE3900220A1 (en) * 1989-01-05 1990-07-12 Wilkhahn Wilkening & Hahne CHAIR
US5348371A (en) * 1989-12-14 1994-09-20 Shepherd Products U.S., Inc. Mechanical device for use particularly for the synchronous movement of the seat and backrest of a chair
WO1992004844A1 (en) * 1990-09-14 1992-04-02 Karl Schreckenberg A chair
WO1992007490A1 (en) * 1990-10-25 1992-05-14 Martin Stoll Gmbh Chair
US5280998A (en) * 1991-03-01 1994-01-25 Miotto & Associates International Limited S.R.L. Mechanical device, particularly for the movement and selective locking of a chair
US9504327B2 (en) * 2015-02-09 2016-11-29 Harmony Lifestyle, LLC Reclinable chair having a locking gas spring reclining back rest

Also Published As

Publication number Publication date
DE3316533A1 (en) 1984-11-08
US4682814A (en) 1987-07-28
CH659179A5 (en) 1987-01-15
EP0179933B1 (en) 1991-07-03
ATE64838T1 (en) 1991-07-15
DE3484777D1 (en) 1991-08-08

Similar Documents

Publication Publication Date Title
EP0179933B1 (en) Office chair
DE886209C (en) Adjustable resting furniture
EP0349762B1 (en) Seat, in particular for a crewmember of an aircraft
DE60300064T2 (en) Chair with movable seat and backrest
AT392889B (en) TURNOVABLE SEAT FURNITURE
CH636252A5 (en) ERGONOMIC CHAIR.
DE3534496A1 (en) SEAT FURNITURE
EP0250995A2 (en) Chair, particularly an office chair
DE813760C (en) Chair with cushioned backrest
EP0264029B1 (en) Chair
DE3817761A1 (en) Chair, in particular work or office chair
EP3387957B1 (en) Synchronising mechanism for an office chair
EP0336288A1 (en) Chair frame
DE102013104760B3 (en) Vehicle seat, in particular for a motor vehicle
DE500846C (en) Chair with reclining seat
DE854421C (en) Adjustable resting furniture
DE2843058A1 (en) Adjustment mechanism for reclining seats - includes height adjustment for backrest to reduce relative movement between seat and rest
CH666392A5 (en) POINT SYNCHRONIZER ADJUSTMENT FOR OFFICE CHAIRS.
DE1135143B (en) Adjustable seat and reclining chair with swiveling backrest, seat and footrest
DE4219599C2 (en) Synchronizing device for office chairs or the like
EP0233974A1 (en) Tilting device for sitting-furniture
DE1290685B (en) Reclining armchair
DE2332751A1 (en) ADJUSTABLE ARMCHAIR WITH TWO-PIECE BACKREST
DE1429413B2 (en) FITTING FOR AN ARMCHAIR ADJUSTABLE IN MULTIPLE POSITIONS
DE1289630B (en) Reclining reclining chair

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19860317

17Q First examination report despatched

Effective date: 19880603

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: PROVENDA MARKETING AG

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: PROVENDA-MARKETING AG, REHETOBEL

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19910703

Ref country code: GB

Effective date: 19910703

REF Corresponds to:

Ref document number: 64838

Country of ref document: AT

Date of ref document: 19910715

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: ING. C. GREGORJ S.P.A.

REF Corresponds to:

Ref document number: 3484777

Country of ref document: DE

Date of ref document: 19910808

ET Fr: translation filed
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19931022

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19931029

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19931031

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19931101

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19931105

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19931129

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19941029

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19941031

Ref country code: CH

Effective date: 19941031

Ref country code: BE

Effective date: 19941031

BERE Be: lapsed

Owner name: PROVENDA-MARKETING A.G. REHETOBEL

Effective date: 19941031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19950501

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19950630

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19950701

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST