EP0136374B1 - Chair with an inclinable seat and back-rest - Google Patents

Chair with an inclinable seat and back-rest Download PDF

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Publication number
EP0136374B1
EP0136374B1 EP83111332A EP83111332A EP0136374B1 EP 0136374 B1 EP0136374 B1 EP 0136374B1 EP 83111332 A EP83111332 A EP 83111332A EP 83111332 A EP83111332 A EP 83111332A EP 0136374 B1 EP0136374 B1 EP 0136374B1
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EP
European Patent Office
Prior art keywords
armrest
chair
bearing
seat portion
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.)
Expired
Application number
EP83111332A
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German (de)
French (fr)
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EP0136374A3 (en
EP0136374A2 (en
Inventor
Hermann Locher
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Giroflex Entwicklungs AG
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Giroflex Entwicklungs AG
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Publication date
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Priority to AT83111332T priority Critical patent/ATE27763T1/en
Publication of EP0136374A2 publication Critical patent/EP0136374A2/en
Publication of EP0136374A3 publication Critical patent/EP0136374A3/xx
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Publication of EP0136374B1 publication Critical patent/EP0136374B1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • 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
    • A47C1/03255—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

Definitions

  • the invention relates to a chair with a bearing part, on which a seat part is supported by a joint and a backrest part having a backrest and a backrest lever by the backrest lever in a further joint, one of the joints being a thrust swivel joint and seat part and backrest part a swivel joint are coupled to each other, stand under the action of at least one spring element and can be tilted into different positions, the seat part and backrest part executing a relative movement to one another which is superimposed on their pivoting movement when they change to another position.
  • a chair according to the preamble of claim 1 is known from WO-A-8 300 610 (Fig. 1).
  • the chair in which both the seat part and the backrest part can be tilted are known in various designs. On the one hand, these allow the user to take up a work position in which the backrest is approximately vertical and supports the user in the back, and on the other hand to take a rest position.
  • the chair in this case has a seat part and a backrest part which are coupled to one another and can be inclined relative to a bearing part.
  • the bearing part is usually designed as a base on which the seat part and the backrest part are pivotably mounted.
  • the backrest which is displaceable relative to the backrest part and controlled by the additional linkage, is a construction which is produced from a relatively large number of parts which have to be machined correspondingly precisely.
  • the invention comes in, which is based on the object of designing a chair of the type described at the outset in such a way that the “pull-out effect is avoided without requiring more parts than is necessary for the known simple design described at the outset.
  • This object is achieved according to the invention in that the seat part has an extension part which extends beyond the swivel joint against the backrest and the backrest lever has an extension arm connecting the backrest to the swivel joint.
  • Fig. 1 shows the kinematic equivalent image of a chair without a base frame, the latter being replaced by two fixed bearing points 1, 2.
  • a seat part 3 is mounted by means of a thrust swivel 4.
  • a backrest part 6 is mounted by means of a swivel joint 5.
  • the backrest part 6 is composed of a backrest 7 and a backrest lever 8, the backrest lever 8 being coupled to the seat part 3 by means of a swivel joint 9.
  • the seat part 3 has an extension part 10 which extends from the joint 9 to the area of the backrest 7.
  • the backrest lever 8 has an extension arm 11 which extends from the joint 9 against the backrest 7 in an analogous manner to the extension part 10 and carries it.
  • the extended position of the individual parts shown in FIG. 1 corresponds to the working position, ie the backrest 7 assumes an approximately vertical position to support the back of the user. So that this position is assumed automatically, the free end 12 of the extension part 10 with the backrest 7 by a spring element 13, for. B. a mechanical compression spring element or a gas pressure spring connected.
  • a spring element 13 for. B. a mechanical compression spring element or a gas pressure spring connected.
  • the arrangement of one or more spring elements 13 need not lie exclusively in the area of the backrest 7.
  • the seat part 3 and the backrest part 6 can also be supported in a different way by the spring element or the spring elements 13, for. B. in that one end of the suspension is supported on the base and the other end acts either on the backrest part 6 or the seat part 3. This arrangement is appropriately made so that it does not adversely affect the appearance of the chair becomes.
  • FIG. 2-4 shows the constructive solution of the kinematic substitute image according to FIG. 1, the same reference numbers as in FIG. 1 being used for the same parts.
  • the two fixed bearing points 1, 2 are replaced by a bearing part 20, each having a bearing leg 22 arranged on both sides of the plane of symmetry 21 of the chair, which is supported by a cross strut 23 on a bearing head 24 which with a vertically located pivot shaft 25 is connected.
  • the bearing part 20 can, for example, be part of a base frame (not shown), the center column of which is supported on a base and is the mounting for the pivot shaft 25.
  • a back portion 27, z. B. a back cushion shown in dash-dot lines.
  • the parts 26, 27 make the movements of the corresponding parts 3, 6.
  • the seat part 3 is a frame, see FIG. 4, which is composed of two hollow profile legs 30 arranged symmetrically to the plane of symmetry 21 of the chair, which are connected to one another by a cross member 31.
  • the hollow profile legs 30 are formed from two nested U-profiles 32, 33, see FIG. 3, the lower profile 33 forming a recess 34, into each of which a backrest lever 8 fits.
  • Two backrest struts 35 adjoin the two backrest levers 8, which together with a backrest cross-member 36 connecting the two backrest struts 35 and the backrest levers 8 form the frame-shaped backrest 7.
  • a pair of webs 37, 38 is fastened, the webs of which have bores for receiving bolts with which the spring element 13 is held at its ends.
  • the design of the chair shown in Fig. 2-4 is not only a simple one. but also represents a space-saving solution. since the backrest levers 8 are at least partially within the hollow profile legs 30 of the seat part 3. 2, the rest position of the chair is also shown in dashed lines, the unequal lowering lengths A, a of the hollow profile legs 30 and the backrest lever 8 also being recognizable.
  • the embodiment of the chair shown in FIGS. 2-4 has spaced hollow profile legs 30 and backrest levers 8. If this distance is now made smaller and smaller, an embodiment is also conceivable in which the hollow profile legs 30 and the backrest levers 8 each merge into a single part; if necessary, recesses would have to be provided for the bearing head 24 in the seat part leg and for the spring element 13 in the backrest part 6.
  • the seat section 26 and the back section 27 can be supported on this one-leg construction without difficulty.

Abstract

The seat member and the back member are adjustably mounted at each side of the chair in two support bearings or pivot joints of a chair base and are connected to one another by a third pivot joint. The seat member comprises an extension in the direction of the back member while the back member is maintained in spaced relationship to the third pivot joint by part of a lower strut portion on each side of the chair. A spring element is mounted at its ends on the free end of the extension part of the seat member and on the back member. In transition from the working position (full lines) into the relaxed or reclined position (broken lines), a relative motion is superimposed upon the pivoting motions of the seat member and of the back member. This relative motion produces unequal vertical downward displacements of the free end of the seat extension and of the backrest portion where it joins the strut portion. The action of this relative motion avoids the otherwise inevitable stretch effect on the occupant of the chair without requiring the supplementary linkages employed in known constructions.

Description

Die Erfindung betrifft einen Stuhl mit einem Lagerteil, an dem ein Sitzteil durch ein Gelenk und ein eine Lehne und einen Lehnenhebel aufweisender Lehnenteil durch den Lehnenhebel in einem weiteren Gelenk abgestützt sind, wobei eines der Gelenke ein Schub-Drehgelenk ist und Sitzteil und Lehnenteil ein Drehgelenk miteinander gekuppelt sind, unter der Wirkung mindestens eines Federelementes stehen und in verschiedene Stellungen neigbar sind, wobei Sitzteil und Lehnenteil beim Uebergang in eine andere Stellung eine ihrer Schwenkbewegung überlagerte Relativbewegung zueinander ausführen.The invention relates to a chair with a bearing part, on which a seat part is supported by a joint and a backrest part having a backrest and a backrest lever by the backrest lever in a further joint, one of the joints being a thrust swivel joint and seat part and backrest part a swivel joint are coupled to each other, stand under the action of at least one spring element and can be tilted into different positions, the seat part and backrest part executing a relative movement to one another which is superimposed on their pivoting movement when they change to another position.

Ein Stuhl gemäß dem Oberbegriff des Patentanspruchs 1 ist durch die WO-A-8 300 610 (Fig. 1) bekannt.A chair according to the preamble of claim 1 is known from WO-A-8 300 610 (Fig. 1).

Stühle, bei denen sowohl der Sitzteil als auch der Lehnenteil neigbar sind, sind in verschiedenen Ausführungen bekannt. Diese erlauben dem Benützer, einerseits eine Arbeitsstellung, bei der die Lehne annähernd senkrecht steht und den Benützer im Rücken stützt, und andererseits eine Ruhestellung einzunehmen. Der Stuhl weist hierbei einen Sitzteil und einen Lehnenteil auf, die miteinander gekuppelt und gegenüber einem Lagerteil neigbar sind. Der Lagerteil ist gewöhnlich als Fussgestell ausgebildet, an dem der Sitzteil und der Lehnenteil schwenkbar gelagert sind.Chairs in which both the seat part and the backrest part can be tilted are known in various designs. On the one hand, these allow the user to take up a work position in which the backrest is approximately vertical and supports the user in the back, and on the other hand to take a rest position. The chair in this case has a seat part and a backrest part which are coupled to one another and can be inclined relative to a bearing part. The bearing part is usually designed as a base on which the seat part and the backrest part are pivotably mounted.

Der mit solchen Stühlen gewährte Komfort wird dadurch beeinträchtigt, dass beim Uebergang in eine andere Sitzstellung, vor allem beim Uebergang von der Arbeits- in die Ruhestellung, ein unerwünschter « Auszieheffekt auftritt, der nur durch Nichtbenützung der Lehne während der Stellungsänderung vermieden werden kann.The comfort afforded by such chairs is impaired by the fact that when changing to a different sitting position, especially when changing from the working to the resting position, an undesirable pull-out effect occurs which can only be avoided by not using the backrest during the change of position.

Um den « Auszieheffekt » zu vermeiden, sind verschiedene Vorschläge bekannt geworden. Unter diesen befindet sich eine bekannte Ausführung (WO-A-8 300 610), bei der von der bekannten Ausführungsform mit einem neigbaren Sitzteil und einem neigbaren, mit dem Sitzteil gekuppelten Lehnenteil ausgegangen wird. Um den « Auszieheffekt » zu vermeiden, ist ein Zusatzgestänge vorgesehen, das mit einem zum Lehnenteil senkrecht verschiebbaren Rückenteil gekuppelt ist. Wird die Stellung des Stuhls verändert, führt der Rückenteil gegenüber dem Lehnenteil eine Zusatzbewegung aus. Ist nun das Rückenpolster an den Lehnenteil befestigt, wird dadurch die gewünschte Vermeidung des « Auszieheffektes erreicht.Various proposals have become known in order to avoid the “pull-out effect”. Among these is a known version (WO-A-8 300 610), in which the known embodiment is based on a tiltable seat part and a tiltable backrest part coupled to the seat part. In order to avoid the "pull-out effect", an additional linkage is provided which is coupled to a back part which can be displaced perpendicularly to the backrest part. If the position of the chair is changed, the back section performs an additional movement in relation to the backrest section. If the back cushion is now attached to the backrest part, the desired avoidance of the pull-out effect is achieved.

Es kann jedoch nicht übersehen werden, dass diese bekannte Ausführungsform eine recht aufwendige Lösung darstellt. Insbesondere ist die gegenüber dem Lehnenteil verschiebbare und durch das Zusatzgestänge gesteuerte Rückenlehne eine Konstruktion, die aus einer grösseren Anzahl Teile hergestellt ist, die entsprechend exakt bearbeitet sein müssen.However, it cannot be overlooked that this known embodiment represents a rather complex solution. In particular, the backrest, which is displaceable relative to the backrest part and controlled by the additional linkage, is a construction which is produced from a relatively large number of parts which have to be machined correspondingly precisely.

Hier setzt die Erfindung ein, der die Aufgabe zugrundeliegt, einen Stuhl der eingangs beschriebenen Art so auszugestalten, dass der « Auszieheffekt vermieden wird, ohne dass mehr Teile benötigt werden, als dies für die eingangs beschriebene bekannte einfache Ausführung erforderlich ist. Diese Aufgabe wird gemäss der Erfindung dadurch gelöst, dass der Sitzteil einen sich über das Drehgelenk hinaus gegen die Lehne erstreckenden Verlängerungsteil und der Lehnenhebel einen die Lehne mit dem Drehgelenk verbindenden Verlängerungsarm aufweist.This is where the invention comes in, which is based on the object of designing a chair of the type described at the outset in such a way that the “pull-out effect is avoided without requiring more parts than is necessary for the known simple design described at the outset. This object is achieved according to the invention in that the seat part has an extension part which extends beyond the swivel joint against the backrest and the backrest lever has an extension arm connecting the backrest to the swivel joint.

Besondere Ausführungsarten der Erfindung sind in den abhängigen Patentansprüchen 2-9 angegeben.Particular embodiments of the invention are specified in dependent claims 2-9.

Die Erfindung ist in der Zeichnung in einem Ausführungsbeispiel dargestellt und nachfolgend beschrieben. Es zeigen :

  • Figur 1 ein kinematisches Ersatzbild eines Stuhls gemäss der Erfindung,
  • Figur 2 eine schematisch dargestellte konstruktive Lösung für einen Stuhl mit der Kinematik gemäss Fig.1.
  • Figur 3 einen Schnitt längs der Linie III-III in Fig. 2 und
  • Figur4 einen Grundriss, teilweise im Schnitt, des Stuhls nach Fig. 2.
The invention is shown in the drawing in one embodiment and described below. Show it :
  • FIG. 1 shows a kinematic equivalent image of a chair according to the invention,
  • Figure 2 is a schematically illustrated constructive solution for a chair with the kinematics according to Fig.1.
  • 3 shows a section along the line III-III in Fig. 2 and
  • 4 shows a floor plan, partly in section, of the chair according to FIG. 2.

Fig. 1 stellt das kinematische Ersatzbild eines Stuhls ohne Fussgestell dar, weich letzteres durch zwei ortsfeste Lagerstellen 1, 2 ersetzt ist. In der Lagerstelle 1 ist ein Sitzteil 3 mittels eines Schub-Drehgelenkes 4 gelagert. In der Lagerstelle 2 ist mittels eines Drehgelenkes 5 ein Lehnenteil 6 gelagert. Der Lehnenteil 6 setzt sich aus einer Lehne 7 und einem Lehnenhebel 8 zusammen, wobei der Lehnenhebel 8 mit dem Sitzteil 3 mittels eines Drehgelenkes 9 gekuppelt ist. Wesentlich ist, dass der Sitzteil 3 einen Verlängerungsteil 10 aufweist, der sich von dem Gelenk 9 bis in den Bereich der Lehne 7 erstreckt. Der Lehnenhebel 8 weist einen Verlängerungsarm 11 auf, der sich in analoger Weise wie der Verlängerungsteil 10 von dem Gelenk 9 gegen die Lehne 7 erstreckt und diese trägt. Die in Fig. 1 dargestellte ausgezogene Stellung der einzelnen Teile entspricht der Arbeitsstellung, d. h. die Lehne 7 nimmt eine angenähert senkrechte Stellung zur Unterstützung des Rückens des Benützers ein. Damit diese Stellung selbsttätig eingenommen wird, ist das freie Ende 12 des Verlängerungsteils 10 mit der Lehne 7 durch ein Federelement 13, z. B. ein mechanisches Druckfederelement oder eine Gasdruckfeder, verbunden. Die Anordnung eines oder mehrerer Federelemente 13 braucht jedoch nicht ausschliesslich im Bereich der Lehne 7 zu liegen. Der Sitzteil 3 und der Lehnenteil 6 können auch in anderer Weise durch das Federelement bzw. die Federelemente 13 abgestützt sein, z. B. dadurch, dass das eine Ende der Federung sich am Fussgestell abstützt und das andere Ende entweder auf den Lehnenteil 6 oder den Sitzteil 3 wirkt. Diese Anordnung wird zweckmässig so getroffen, dass dadurch das Aussehen des Stuhls nicht ungünstig beeinflusst wird.Fig. 1 shows the kinematic equivalent image of a chair without a base frame, the latter being replaced by two fixed bearing points 1, 2. In the bearing 1 a seat part 3 is mounted by means of a thrust swivel 4. In the bearing point 2, a backrest part 6 is mounted by means of a swivel joint 5. The backrest part 6 is composed of a backrest 7 and a backrest lever 8, the backrest lever 8 being coupled to the seat part 3 by means of a swivel joint 9. It is essential that the seat part 3 has an extension part 10 which extends from the joint 9 to the area of the backrest 7. The backrest lever 8 has an extension arm 11 which extends from the joint 9 against the backrest 7 in an analogous manner to the extension part 10 and carries it. The extended position of the individual parts shown in FIG. 1 corresponds to the working position, ie the backrest 7 assumes an approximately vertical position to support the back of the user. So that this position is assumed automatically, the free end 12 of the extension part 10 with the backrest 7 by a spring element 13, for. B. a mechanical compression spring element or a gas pressure spring connected. However, the arrangement of one or more spring elements 13 need not lie exclusively in the area of the backrest 7. The seat part 3 and the backrest part 6 can also be supported in a different way by the spring element or the spring elements 13, for. B. in that one end of the suspension is supported on the base and the other end acts either on the backrest part 6 or the seat part 3. This arrangement is appropriately made so that it does not adversely affect the appearance of the chair becomes.

Die Ruhestellung des Stuhls ist in Fig. 1 gestrichelt angegeben, wobei ersichtlich ist, dass z. B. der Lehnenteil 6 am Uebergang des Verlängerungsarmes 11 auf die Lehne 7 eine grössere Absenkung A erfährt, als dies bei der Absenkung a des freien Endes 12 des Sitzteils 3 der Fall ist. Beide Teile 3. 6 führen somit beim Uebergang von der Arbeitsstellung in die Ruhestellung eine Schwenkbewegung aus, der jedoch noch eine Relativbewegung überlagert ist, die zu unterschiedlichen Absenkungen A, a der Teile 3, 6 führt. Durch entsprechende Wahl der Länge des Verlängerungsteils 10 und des Verlängerungsarmes 11 kann diese überlagerte Relativbewegung so ausgelegt werden, dass der eingangs erwähnte « Auszieheffekt » praktisch vermieden wird.The rest position of the chair is shown in dashed lines in Fig. 1, it being apparent that, for. B. the backrest part 6 at the transition of the extension arm 11 to the backrest 7 experiences a greater lowering A than is the case with the lowering a of the free end 12 of the seat part 3. Both parts 3. 6 thus perform a swiveling movement at the transition from the working position to the rest position, but this is still superimposed on a relative movement which leads to different reductions A, a of the parts 3, 6. By appropriate selection of the length of the extension part 10 and the extension arm 11, this superimposed relative movement can be designed in such a way that the “pull-out effect” mentioned at the outset is practically avoided.

In Fig. 2-4 ist die konstruktive Lösung des kinematischen Ersatzbildes nach Fig. 1 dargestellt, wobei für gleiche Teile dieselben Bezugszahlen wie in Fig. 1 verwendet werden.2-4 shows the constructive solution of the kinematic substitute image according to FIG. 1, the same reference numbers as in FIG. 1 being used for the same parts.

In Fig. 2 sind die beiden ortsfesten Lagerstellen 1, 2 durch einen Lagerteil 20 ersetzt, der je einen beidseits der Symmetrieebene 21 des Stuhls angeordneten Lagerschenkel 22 aufweist, der durch eine Querstrebe 23 an einem Lagerkopf 24 abgestützt ist, der mit einer senkrecht liegenden Schwenkwelle 25 verbunden ist. Der Lagerteil 20 kann beispielsweise ein Teil eines Fussgestells (nicht dargestellt) sein, dessen auf einem Fuss abgestützte Mittelsäule die Lagerung für die Schwenkwelle 25 ist. In Fig. ist strichpunktiert eine auf dem Sitzteil 3 liegende Sitzpartie 26, z. B. ein Sitzpolster, dargestellt. In gleicher Weise ist an der Lehne 7 eine Rückenpartie 27, z. B. ein Rückenpolster, strichpunktiert dargestellt. Die Partien 26, 27 machen die Bewegungen der entsprechenden Teile 3, 6 mit. Die Teile 3, 6 führen, wie dies in Fig. 1 bereits gezeigt wurde, unterschiedliche Absenkungswege A, a aus.In Fig. 2, the two fixed bearing points 1, 2 are replaced by a bearing part 20, each having a bearing leg 22 arranged on both sides of the plane of symmetry 21 of the chair, which is supported by a cross strut 23 on a bearing head 24 which with a vertically located pivot shaft 25 is connected. The bearing part 20 can, for example, be part of a base frame (not shown), the center column of which is supported on a base and is the mounting for the pivot shaft 25. In Fig. Is dash-dotted a lying on the seat part 3 seat 26, z. B. a seat cushion shown. In the same way, a back portion 27, z. B. a back cushion, shown in dash-dot lines. The parts 26, 27 make the movements of the corresponding parts 3, 6. The parts 3, 6, as has already been shown in FIG. 1, execute different lowering paths A, a.

Der Sitzteil 3 ist ein Rahmen, siehe Fig. 4, der sich aus zwei symmetrisch zur Symmetrieebene 21 des Stuhls angeordneten Hohlprofilschenkeln 30 zusammensetzt, die durch eine Traverse 31 miteinander verbunden sind. Die Hohlprofilschenkel 30 sind aus zwei ineinandergesteckten U-Profilen 32. 33, siehe Fig. 3, gebildet, wobei das untere Profil 33 eine Ausnehmung 34 bildet, in die je ein Lehnenhebel 8 passt. An die beiden Lehnenhebel 8 schliessen zwei Lehnenstreben 35 an, die zusammen mit einer die beiden Lehnenstreben 35 verbindenden Lehnentraverse 36 und den Lehnenhebeln 8 die rahmenförmige Lehne 7 bilden. Auf der Traverse 31 und der Lehnentraverse 36 ist je ein Stegpaar 37, 38 befestigt, deren Stege Bohrungen zur Aufnahme von Bolzen aufweisen, mit denen das Federelement 13 an seinen Enden gehalten ist.The seat part 3 is a frame, see FIG. 4, which is composed of two hollow profile legs 30 arranged symmetrically to the plane of symmetry 21 of the chair, which are connected to one another by a cross member 31. The hollow profile legs 30 are formed from two nested U-profiles 32, 33, see FIG. 3, the lower profile 33 forming a recess 34, into each of which a backrest lever 8 fits. Two backrest struts 35 adjoin the two backrest levers 8, which together with a backrest cross-member 36 connecting the two backrest struts 35 and the backrest levers 8 form the frame-shaped backrest 7. On the crossbar 31 and the backrest crossbar 36, a pair of webs 37, 38 is fastened, the webs of which have bores for receiving bolts with which the spring element 13 is held at its ends.

In der Arbeitsstellung nach Fig. 1 und 2 liegen nicht nur die Lehnenhebel 8 in den Ausnehmungen 34 der Hohlprofilschenkel 30. sondern die beiden Lehnenstreben 35 ragen im Bereich ihres Ueberganges auf die Lehnenhebel 8 in eine Ausnehmung 39 an dem lehnenseitigen Ende der Hohlprofilschenkel 30. Je nach der Ausbildung der Ausnehmungen 34, 39 stellen diese einen Anschlag für die Arbeitsstellung des Lehnenteils 6 dar.In the working position according to FIGS. 1 and 2, not only are the backrest levers 8 in the recesses 34 of the hollow profile legs 30, but the two backrest struts 35 project in the region of their transition from the backrest levers 8 into a recess 39 at the back end of the hollow profile legs 30. Each after the formation of the recesses 34, 39, these represent a stop for the working position of the backrest part 6.

Die in Fig. 2-4 gezeigte Ausbildung des Stuhls stellt nicht nur eine einfache. sondern auch eine platzsparende Lösung dar. da die Lehnenhebel 8 mindestens teilweise innerhalb der Hohlprofilschenkel 30 des Sitzteils 3 liegen. In Fig. 2 ist auch die Ruhestellung des Stuhl gestrichelt dargestellt, wobei die ungleichen Absenkungslängen A, a der Hohlprofilschenkel 30 und der Lehnenhebel 8 ebenfalls erkennbar sind.The design of the chair shown in Fig. 2-4 is not only a simple one. but also represents a space-saving solution. since the backrest levers 8 are at least partially within the hollow profile legs 30 of the seat part 3. 2, the rest position of the chair is also shown in dashed lines, the unequal lowering lengths A, a of the hollow profile legs 30 and the backrest lever 8 also being recognizable.

Die in Fig. 2-4 dargestellte Ausführungsform des Stuhls weist mit Abstand angeordnete Hohlprofilschenkel 30 und Lehnenhebel 8 auf. Wird nun dieser Abstand immer kleiner und kleiner gemacht, ist auch eine Ausführung denkbar, bei der die Hohlprofilschenkel 30 und die Lehnenhebel 8 in je einen einzigen Teil übergehen ; es müssten gegebenenfalls Ausnehmungen für den Lagerkopf 24 im Sitzteilschenkel und für das Federelement 13 im Lehnenteil 6 vorgesehen werden. Auf diese Einschenkel-Konstruktion kann die Sitzpartie 26 und die Rückenpartie 27 ohne Schwierigkeit abgestützt werden.The embodiment of the chair shown in FIGS. 2-4 has spaced hollow profile legs 30 and backrest levers 8. If this distance is now made smaller and smaller, an embodiment is also conceivable in which the hollow profile legs 30 and the backrest levers 8 each merge into a single part; if necessary, recesses would have to be provided for the bearing head 24 in the seat part leg and for the spring element 13 in the backrest part 6. The seat section 26 and the back section 27 can be supported on this one-leg construction without difficulty.

Für die beschriebene Stuhlausführung werden vor allem geschlossene Stahlrohre in Ovalform verwendet, siehe z. B. die Lehnenhebel 8, die Lehnenstreben 35, die Traversen 31. 36 und die Lagerschenkel und Querstreben 22, 23 des Lagerteils 20. Es können jedoch auch andere Profile aus Stahl verwendet werden. Insbesondere bei der erwähnten Einschenkel-Konstruktion könnten gegossene oder geschmiedete Stahlteile angewendet werden. Eine andere Abwandlung des beschriebenen Stuhls besteht darin, dass als Federelement eine Torsionsfeder verwendet wird. die in eines der Gelenke 4, 5 eingebaut werden kann. Schliesslich könnte auch das Gelenk 5 als Schub-Drehgelenk ausgebildet sein, während das Gelenk 4 ein Drehgelenk ist. Die Schubwege sind in jedem Fall verhältnismässig klein, d. h. nur einige Millimeter, da sich das Drehgelenk 9 im Scheitelbereich des durch den Sitzteil 3 und den Lehnenhebel 8 gebildeten Schenkels befindet.For the chair design described above, closed steel tubes in oval shape are used, see e.g. B. the backrest lever 8, the backrest struts 35, the cross members 31, 36 and the bearing legs and cross struts 22, 23 of the bearing part 20. However, other profiles made of steel can also be used. Cast or forged steel parts could be used in particular in the aforementioned one-leg construction. Another modification of the chair described is that a torsion spring is used as the spring element. which can be installed in one of the joints 4, 5. Finally, the joint 5 could also be designed as a thrust rotary joint, while the joint 4 is a rotary joint. The thrust distances are in any case relatively small, i. H. only a few millimeters, since the swivel joint 9 is located in the apex region of the leg formed by the seat part 3 and the backrest lever 8.

Claims (9)

1. Chair with a bearing portion (1, 2, 20), on which a seat portion (3) is supported by means of a joint (4) and an armrest portion (6), comprising an armrest (7) and an armrest lever (8), through said level (8) in a further joint (5), one of the joints (4, 5) being a thrust-swivel joint, and the seat portion (3) as well as the armrest portion (6) are coupled together by means of a swivel joint (9) and are effected by at least one spring element (13) and are tiltable in different positions, and that the seat portion (3) and the armrest portion (6) in the transition to another position are moving relative to each other in a movement superimposed over their swivel motion, characterized in that the seat portion (3) includes an elongation portion (10) extending past the swivel joint (9) toward the armrest (7), and that the armrest lever (8) comprises an extension arm (11) connecting the armrest (7) with the swivel joint (9).
2. Chair according to claim 1, characterized in that the ends of the spring element (13), e. g. a gas pressure spring, are supported on the armrest (7) and on the free end (12) of the elongation portion (10) of the seat portion (3).
3. Chair according to claim 1 oder 2, characterized in that one end of the spring element (13) is supported on the seat portion (3) or the armrest portion (6), and the other end on the bearing portions (1, 2, 20).
4. Chair according to claim 1, characterized in that the spring element (13) is a torsion rod. that is built into the joints (4, 5).
5. Chair according to claim 1, characterized in that the seat portion (3) includes at least one hollow leg section (30)' comprising one recess each on the bearing and the armrest side.
6. Chair according to claim 5, characterized in that the seat portion (3) is a frame consisting of two spaced hollow leg sections (30), connected to the armrest end by a girder (31), while the armrest portion (6) is a corresponding frame comprising two armrest levers (8), matching the recesses (34, 39) in said legs (30), and armrest struts (35) as well as an armrest traverse (36) over said girder (31
7. Chair according to claim 6, characterized in that the or each spring element (13) is/are supported on the girder (31) and the armrest traverse (36).
8. Chair according to claim 6 or 7, characterized in that the bearing portion (20) has one bearing arm (22) on each side of a plane of symmetry (21) for the chair for the support of the seat portion (3) and the armrest (6), the bearing arms being raisable and depressable supported by one crossarm (23) each on a pivoted bearing head (24).
9. Chair according to claim 8, characterized in that the bearing between the seat portion (3) and the bearing arm (22) is a thrust-swivel joint (4).
EP83111332A 1983-10-05 1983-11-12 Chair with an inclinable seat and back-rest Expired EP0136374B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83111332T ATE27763T1 (en) 1983-10-05 1983-11-12 CHAIR WITH TILTABLE SEAT AND BACKREST.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH541883 1983-10-05
CH5418/83 1983-10-05

Publications (3)

Publication Number Publication Date
EP0136374A2 EP0136374A2 (en) 1985-04-10
EP0136374A3 EP0136374A3 (en) 1985-06-12
EP0136374B1 true EP0136374B1 (en) 1987-06-16

Family

ID=4293248

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83111332A Expired EP0136374B1 (en) 1983-10-05 1983-11-12 Chair with an inclinable seat and back-rest

Country Status (7)

Country Link
US (1) US4668012A (en)
EP (1) EP0136374B1 (en)
JP (1) JPS6077712A (en)
AT (1) ATE27763T1 (en)
CA (1) CA1237973A (en)
DE (1) DE3372059D1 (en)
ZA (1) ZA843867B (en)

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US4979778A (en) * 1989-01-17 1990-12-25 Brayton International, Inc. Synchrotilt chair
DE3916474A1 (en) * 1989-05-20 1990-11-22 Roeder Soehne Sitzmoebelfab CHAIR, ESPECIALLY WORK OR OFFICE CHAIR
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CA2319865C (en) 1992-06-15 2001-12-11 Herman Miller, Inc. Tilt control mechanism for a chair
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US4432582A (en) * 1981-12-17 1984-02-21 Wilkhahn-Wilkening & Hahne Gmbh & Company Chair with means for adjusting the inclination of the backrest
DE3232771A1 (en) * 1982-09-03 1984-03-08 Wilkhahn Wilkening + Hahne GmbH + Co, 3252 Bad Münder WORK SEAT

Also Published As

Publication number Publication date
JPS6077712A (en) 1985-05-02
EP0136374A3 (en) 1985-06-12
JPH0454446B2 (en) 1992-08-31
ZA843867B (en) 1985-04-24
ATE27763T1 (en) 1987-07-15
DE3372059D1 (en) 1987-07-23
CA1237973A (en) 1988-06-14
EP0136374A2 (en) 1985-04-10
US4668012A (en) 1987-05-26

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