EP0399251B1 - Chair, particularly work- or office-chair - Google Patents
Chair, particularly work- or office-chair Download PDFInfo
- Publication number
- EP0399251B1 EP0399251B1 EP19900108266 EP90108266A EP0399251B1 EP 0399251 B1 EP0399251 B1 EP 0399251B1 EP 19900108266 EP19900108266 EP 19900108266 EP 90108266 A EP90108266 A EP 90108266A EP 0399251 B1 EP0399251 B1 EP 0399251B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- seat
- chair
- bearing block
- pivot
- portions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- 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
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- 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
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- 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
- Chair in particular work or office chair, with a seat which can be pivoted in the front region about a horizontal pivot axis and whose inclination can be changed and, depending on the change in inclination of the seat, the inclination of the backrest which can be changed disproportionately, in which the inclination of the seat increases with increasing inclination mutually facing ends of the seat and the backrest approach each other, the seat being adjustable with its pivot axis in backward sloping guides towards the backrest and in which the seat extends below it and rotatably mounted on the pedestal of the chair frame of pivot levers from the rear End of the seat is articulated away, which extend beyond the rear edge of the seat and go into approximately right-angled sections to which the backrest is attached.
- a chair of this type is identified as known in EP-A 0 237 825.
- the seat is over a horizontal pivot axis arranged in the front area can be pivoted and, in addition, when the rear seat part is inclined downward, the seat is guided obliquely downward in the area of the front axis of rotation.
- Pins 6 engage in hollow guides on the front edge of the seat.
- pivot levers are provided which extend with their one sections below the seat surface and extend over the rear edge of the seat and there have further sections bent upwards which support the backrest. As shown in FIG. 2 of this document, the part of the pivoting lever that extends under the seat has a rear section with respect to the seat surface, which has two further approaches in its front area.
- One section points obliquely backwards and is articulated at its end to the seat, while the other section is directed downward and is articulated at a bearing point connected by a spring.
- the pivot lever is rotatably attached to the bearing block.
- the formation of the pivot lever is relatively complicated due to the different sections under the seat and unfavorable in that the sections extending in different vertical directions oppose the pursuit of a flat height.
- the swivel bearing in the front seating area is designed to be complex.
- DE-GM 88 14 409 Another such chair is described in DE-GM 88 14 409. With this adjustment mechanism, this known chair achieves a relative movement between the backrest and the rear end of the seat without additional carrying levers, which articulate the front pivot axis of the seat with the bearing block, as are required for a seat according to DE-GM 88 06 835.
- the swivel levers are at this known chair preferably designed as armrests and armrests, since they are guided over the seat.
- the pivot axis of the seat on the bearing block is guided to be adjustable to a limited extent in elongated holes, and in that the sections extending under the seat form an obtuse angle of approximately 150 ° to 170 ° to the standing surface, the articulated connection of the seat at the transition point which is arranged at the sections and the rotatable support on the bearing block at the opposite free end region of the section.
- the swivel levers are arranged below the seat and only protrude over the seat in the area of the rear edge and support the backrest with these sections.
- the configuration is such that the sections of the pivot levers adjoining the pivot bearings between the seat and the pivot levers in the direction of the backrest have a length which is greater than the distance of the pivot bearings from the rear edge of the seat, so that the pivot levers change the inclination of the Do not interfere with the seat.
- the seat and backrest can be turned around the pivot bearing of the swivel lever on the pedestal.
- the seat executes a kind of opposite movement, which leads to the shortening of the distance between the backrest and the facing end of the seat. This eliminates the so-called "pull-out effect" when lowering the seat.
- one embodiment provides that the bearing block rises at an angle of approximately 20 ° to the pivot axis of the seat.
- the automatic adjustment of the seat and the backrest into a starting position is achieved according to one embodiment in that the pivot levers are connected to one another in the region of the sections carrying the backrest and in that a gas spring is supported in an articulated manner on the bearing block and a crossbeam connecting the sections to one another.
- the same setting of the starting position can also be achieved in that a torsion bar spring is accommodated in the pivot bearings between the pivot levers and the bearing block, or in that the pivot bearings are supported on the bearing block between the seat and the pivot levers by means of a compression spring.
- Fig. 1 the adjustment mechanism of the chair according to the invention is shown schematically in side view.
- the bearing block 10 attached to the upper end is shown.
- This bearing block 10 rises towards the front edge of the seat 14, of which only the seat support is shown, at an angle of approximately 20 °.
- the horizontal pivot axis 28 of the seat 14 is guided in slots downwards and adjustable in the direction of the backrest. In the initial position of the chair, the pivot axis is at the upper front end of the elongated holes 11. About a third of the depth of the seat 14 from the rear edge of the seat 14, the two pivot levers 17 are rotatably mounted on the underside of the seat 14.
- the two pivot levers 17 in the region of the pivot bearing 21 are firmly connected to one another by means of the cross member 25.
- the ends of the cross member 25 are bent downwards at right angles and are connected in an articulated manner to the bearing straps 16 of the seat 14, as indicated by the screws which are passed through a bore in the bearing straps 16 and are screwed to the bent ends of the cross member 25.
- the pivot levers 17 extend with the sections 18 in the direction of the front of the seat 14 and are rotatably connected to the bearing block 10 approximately below the center of the seat 14, as the pivot bearings 12 show.
- the pivot levers 17 extend in the direction of the rear of the seat 14 and run approximately horizontally in the starting position of the chair with the sections 19.
- the sections 19 extend beyond the rear edge of the seat 14 and merge into the sections 20 bent upward at approximately right angles.
- the backrest 22, of which only the backrest support is shown, is fixedly attached to these sections 20.
- the sections 18 and 19 of the pivot lever 17 enclose an angle ⁇ of approximately 150 ° to approximately 170 ° to the base of the chair.
- the sections 20 of the pivot levers 17 are firmly connected to one another via the cross member 27.
- the gas spring 24 is supported in an articulated manner at the rear end of the bearing block 10 and on the cross member 27, as the joints 13 and 23 show.
- the gas spring 24 pushes the pivot lever 17 counterclockwise around the pivot bearing 21 upward until the sections 19 abut the underside of the seat 14 and the chair assumes its starting position.
- the cross member 26 is attached, which is angled downwards at right angles with its ends.
- the elongated holes 11 are made in the angled ends.
- the tabs 15 of the seat 14 cover the ends of the cross member 26 on the outside thereof. Screws form the pivot axis, which are inserted from the inside of the ends of the cross member 26 into the elongated holes 11 and screwed into threaded holes in the tabs 15.
- Fig. 3 in addition to the initial position of the chair with the seat 14 and the backrest 22 and the lowered position of the seat 14 'and the backrest 22' inclined to the rear. It can be clearly seen that the distance between the facing ends of the seat 14 and backrest 22 changes when adjusting in the lowered position, as shown by the seat 14 'and the backrest 22'. This distance can be reduced from 62 mm, for example, to about 30 mm. The horizontal inclination of the seat 14 from about 2 ° can increase to about 6 °, the seat 14 always falling towards the backrest 22 or 22 '.
- the backrest 22 had an inclination of approximately 7 ° in the starting position, then this inclination has increased to approximately 18 ° in the lowered position, ie the inclination of the backrest 22 has increased disproportionately compared to the inclination of the seat 14.
- the horizontal pivot axis shifts 28 of the seat 14 in the elongated holes 11 to the lower, rear ends of the elongated holes 11 in the position 28 ', whereby a kind of counter movement of the seat 14 is carried out about the pivot bearing 21, which ultimately for the relative movement between the seat 14 and backrest 22 with responsible for.
- the pivot bearings 21 shift their position to 21 'and the pivot levers 17 are pivoted about the pivot bearing 12 until they assume their dashed position 17'.
- the gas spring 24 is compressed since the joint 13 remains in its position and the joint 23 is lowered into the position 23 '.
- the sections of the pivot lever 17 take the positions 18 ', 19' and 20 'in the lowered position.
- the gas spring 24 exerts a restoring force on the pivot lever 17, which returns the seat 14 and the backrest to the starting position.
- the restoring force can also be applied by means of torsion bar springs 29 which are introduced into the rotary bearings 12.
- the pivot axis 28 can also accommodate torsion bar springs of this type.
- the pivot bearing 21 can also be supported on the bearing block 10 by means of a compression spring 30, which exerts the restoring force on the pivot lever 17 and the seat 14.
Landscapes
- Health & Medical Sciences (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Chairs Characterized By Structure (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
- Special Chairs (AREA)
Description
Stuhl, insbesondere Arbeits- oder Bürostuhl, mit einem im vorderen Bereich um eine horizontale Schwenkachse schwenkbaren und in der Neigung veränderbaren Sitz und einer in Abhängigkeit von der Neigungsänderung des Sitzes zwangsweise in der Neigung überproportional veränderbaren Rückenlehne, bei dem mit zunehmender Neigung des Sitzes sich die einander zugekehrten Enden des Sitzes und der Rückenlehne einander nähern, wobei der Sitz mit seiner Schwenkachse in nach rückwärts abfallenden Führungen in Richtung zur Rückenlehne verstellbar ist und bei dem der Sitz mit sich unter ihm erstreckenden und am Lagerbock des Stuhlgestelles drehbar gelagerten Abschnitten von Schwenkhebeln vom hinteren Ende des Sitzes entfernt gelenkig verbunden ist, die sich über die hintere Kante des Sitzes hinauserstrecken und in etwa rechtwinklig nach oben abgebogene Abschnitte übergehen, an denen die Rückenlehne angebracht ist.Chair, in particular work or office chair, with a seat which can be pivoted in the front region about a horizontal pivot axis and whose inclination can be changed and, depending on the change in inclination of the seat, the inclination of the backrest which can be changed disproportionately, in which the inclination of the seat increases with increasing inclination mutually facing ends of the seat and the backrest approach each other, the seat being adjustable with its pivot axis in backward sloping guides towards the backrest and in which the seat extends below it and rotatably mounted on the pedestal of the chair frame of pivot levers from the rear End of the seat is articulated away, which extend beyond the rear edge of the seat and go into approximately right-angled sections to which the backrest is attached.
Ein Stuhl dieser Art ist in der EP-A 0 237 825 als bekannt ausgewiesen ist. Bei diesem bekannten Stuhl ist der Sitz um eine im vorderen Bereich angeordnete horizontale Schwenkachse schwenkbar und außerdem wird bei Abwärtsneigung des hinteren Sitzteiles der Sitz im Bereich der vorderen Drehachse schräg nach unten geführt. Dabei greifen Zapfen 6 in hohle Führungen an der Sitzvorderkante ein. Weiterhin sind Schwenkhebel vorgesehen, die mit ihren einen Abschnitten sich unter der Sitzfläche erstrecken und über die Sitzhinterkante reichen und dort nach oben abgebogene weitere Abschnitte aufweisen, die die Rückenlehne tragen. Wie Fig. 2 dieser Druckschrift zeigt, hat der sich unter dem Sitz erstreckende Teil des Schwenkhebels einen im Bezug zur Sitzfläche hinteren Abschnitt, der in seinem vorderen Bereich zwei weitere Ansätze aufweist. Der eine Abschnitt zeigt schräg nach hinten oben und ist an seinem Ende mit dem Sitz gelenkig verbunden, während der andere Abschnitt nach unten gerichtet ist und an einer mit einer Feder verbundenen Lagerstelle gelenkig angebracht ist. An der Ansatzstelle der bei den Abschnitte ist der Schwenkhebel an dem Lagerbock drehbar angebracht. Die Ausbildung des Schwenkhebels ist infolge der verschiedenen Abschnitte unter dem Sitz relativ kompliziert und insofern ungünstig, als die sich in verschiedene vertikale Richtungen erstreckenden Abschnitte dem Streben nach einer flachen Bauhöhe entgegenstehen. Zudem ist auch die Drehlagerung im vorderen Sitzbereich aufwendig gestaltet.A chair of this type is identified as known in EP-A 0 237 825. In this known chair, the seat is over a horizontal pivot axis arranged in the front area can be pivoted and, in addition, when the rear seat part is inclined downward, the seat is guided obliquely downward in the area of the front axis of rotation. Pins 6 engage in hollow guides on the front edge of the seat. Furthermore, pivot levers are provided which extend with their one sections below the seat surface and extend over the rear edge of the seat and there have further sections bent upwards which support the backrest. As shown in FIG. 2 of this document, the part of the pivoting lever that extends under the seat has a rear section with respect to the seat surface, which has two further approaches in its front area. One section points obliquely backwards and is articulated at its end to the seat, while the other section is directed downward and is articulated at a bearing point connected by a spring. At the attachment point of the sections, the pivot lever is rotatably attached to the bearing block. The formation of the pivot lever is relatively complicated due to the different sections under the seat and unfavorable in that the sections extending in different vertical directions oppose the pursuit of a flat height. In addition, the swivel bearing in the front seating area is designed to be complex.
Ein weiterer derartiger Stuhl ist in der DE-GM 88 14 409 beschrieben. Dieser bekannte Stuhl erreicht mit diesem Verstellmechanismus eine Relativbewegung zwischen der Rückenlehne und dem hinteren Ende des Sitzes ohne zusätzliche Mitführhebel, die die vordere Schwenkachse des Sitzes gelenkig mit dem Lagerbock verbinden, wie sie bei einem Sitz nach dem DE-GM 88 06 835 erforderlich sind. Die Schwenkhebel sind bei diesem bekannten Stuhl vorzugsweise als Armlehnen und Armstützen ausgebildet, da sie über den Sitz geführt sind.Another such chair is described in DE-GM 88 14 409. With this adjustment mechanism, this known chair achieves a relative movement between the backrest and the rear end of the seat without additional carrying levers, which articulate the front pivot axis of the seat with the bearing block, as are required for a seat according to DE-GM 88 06 835. The swivel levers are at this known chair preferably designed as armrests and armrests, since they are guided over the seat.
Es ist Aufgabe der Erfindung, einen Stuhl der eingangs erwähnten Art derart weiterzubilden, daß der sogenannte Hemdauszieheffekt besser eliminiert wird.It is an object of the invention to develop a chair of the type mentioned at the outset in such a way that the so-called shirt pull-out effect is better eliminated.
Diese Aufgabe wird nach der Erfindung dadurch gelöst, daß die Schwenkachse des Sitzes am Lagerbock in Langlöchern begrenzt verstellbar geführt ist, und daß die sich unter dem Sitz erstreckenden Abschnitte zueinander einen zur Standfläche hin stumpfen Winkel von etwa 150° bis 170° bilden, wobei die gelenkige Verbindung des Sitzes an der Übergangsstelle der bei den Abschnitte und die drehbare Abstützung am Lagerbock am gegenüberliegenden freien Endbereich des Abschnittes angeordnet ist.This object is achieved according to the invention in that the pivot axis of the seat on the bearing block is guided to be adjustable to a limited extent in elongated holes, and in that the sections extending under the seat form an obtuse angle of approximately 150 ° to 170 ° to the standing surface, the articulated connection of the seat at the transition point which is arranged at the sections and the rotatable support on the bearing block at the opposite free end region of the section.
Die Schwenkhebel sind unterhalb des Sitzes angeordnet und ragen nur im Bereich der hinteren Kante über den Sitz und tragen mit diesen Abschnitten die Rückenlehne. Dabei ist die Ausgestaltung so, daß die an die Schwenklager zwischen dem Sitz und den Schwenkhebeln in Richtung zur Rückenlehne anschließenden Abschnitte der Schwenkhebel eine Länge aufweisen, die größer ist als der Abstand der Schwenklager von der hinteren Kante des Sitzes, damit die Schwenkhebel die Neigungsveränderung des Sitzes nicht beeinträchtigen.The swivel levers are arranged below the seat and only protrude over the seat in the area of the rear edge and support the backrest with these sections. The configuration is such that the sections of the pivot levers adjoining the pivot bearings between the seat and the pivot levers in the direction of the backrest have a length which is greater than the distance of the pivot bearings from the rear edge of the seat, so that the pivot levers change the inclination of the Do not interfere with the seat.
Sitz und Rückenlehne sind um das Drehlager der Schwenkhebel am Lagerbock verdrehbar. In Verbindung mit dem verstellbaren Schwenklager des Sitzes an dem Lagerbock wird erreicht, daß der Sitz eine Art gegenläufige Bewegung ausführt, die zur Verkürzung des Abstandes zwischen der Rückenlehne und dem zugekehrten Ende des Sitzes führt. Dadurch ist der sogenannte "Auszieheffekt" beim Absenken des Sitzes eliminiert.The seat and backrest can be turned around the pivot bearing of the swivel lever on the pedestal. In connection with the adjustable pivot bearing of the seat on the bracket, it is achieved that the seat executes a kind of opposite movement, which leads to the shortening of the distance between the backrest and the facing end of the seat. This eliminates the so-called "pull-out effect" when lowering the seat.
Um genügend Neigungsveränderung für den Sitz zu erhalten, sieht eine Ausgestaltung vor, daß der Lagerbock zur Schwenkachse des Sitzes hin in einem Winkel von etwa 20° ansteigt.In order to obtain sufficient change in inclination for the seat, one embodiment provides that the bearing block rises at an angle of approximately 20 ° to the pivot axis of the seat.
Die automatische Einstellung des Sitzes und der Rückenlehne in eine Ausgangsstellung wird nach einer Ausgestaltung dadurch erreicht, daß die Schwenkhebel im Bereich der die Rückenlehne tragenden Abschnitte miteinander verbunden sind und daß sich eine Gasfeder gelenkig an dem Lagerbock und einem die Abschnitte miteinander verbindenden Querträger abstützt.The automatic adjustment of the seat and the backrest into a starting position is achieved according to one embodiment in that the pivot levers are connected to one another in the region of the sections carrying the backrest and in that a gas spring is supported in an articulated manner on the bearing block and a crossbeam connecting the sections to one another.
Dieselbe Einstellung der Ausgangsstellung kann auch dadurch erreicht werden, daß in den Drehlagern zwischen den Schwenkhebeln und dem Lagerbock eine Drehstabfeder untergebracht ist, oder daß sich die Schwenklager zwischen dem Sitz und den Schwenkhebeln mittels einer Druckfeder am Lagerbock abstützen.The same setting of the starting position can also be achieved in that a torsion bar spring is accommodated in the pivot bearings between the pivot levers and the bearing block, or in that the pivot bearings are supported on the bearing block between the seat and the pivot levers by means of a compression spring.
Die Erfindung wird anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert. Es zeigt:
- Fig. 1
- eine schematische Teilseitenansicht zur Erläuterung des Verstellmechanismus,
- Fig. 2
- die Unteransicht auf den Verstellmechanismus und
- Fig. 3
- schematisch den Verstellbereich des Sitzes und der Rückenlehne mit Alternativen zur Einstellung des Stuhles in die Ausgangsstellung.
- Fig. 1
- 2 shows a schematic partial side view to explain the adjustment mechanism,
- Fig. 2
- the bottom view of the adjustment mechanism and
- Fig. 3
- schematically the adjustment range of the seat and backrest with alternatives for setting the chair in the starting position.
In Fig. 1 ist in Seitenansicht schematisch der Verstellmechanismus des Stuhles nach der Erfindung gezeigt.In Fig. 1, the adjustment mechanism of the chair according to the invention is shown schematically in side view.
Von dem Stuhlgestell ist nur der am oberen Ende angebrachte Lagerbock 10 gezeigt. Dieser Lagerbock 10 ist zur vorderen Kante des Sitzes 14 hin, von dem nur der Sitzträger gezeigt ist, mit einem Winkel von etwa 20° ansteigend. Die horizontale Schwenkachse 28 des Sitzes 14 ist in Langlöchern begrenzt nach unten und in Richtung zur Rückenlehne hin verstellbar geführt. In der Ausgangsstellung des Stuhles steht die Schwenkachse an dem oberen vordern Ende der Langlöcher 11. Etwa ein Drittel der Tiefe des Sitzes 14 von der hinteren Kante des Sitzes 14 entfernt sind auf der Unterseite des Sitzes 14 die beiden Schwenkhebel 17 drehbar gelagert.Of the chair frame, only the
Wie Fig. 2 zeigt, sind die beiden Schwenkhebel 17 im Bereich des Schwenklagers 21 die beiden Schwenkhebel 17 mittels des Querträgers 25 fest miteinander verbunden. Die Enden des Querträgers 25 sind rechtwinklig nach unten abgebogen und gelenkig mit den Lagerlaschen 16 des Sitzes 14 verbunden, wie die Schrauben andeuten, die durch eine Bohrung der Lagerlaschen 16 hindurch geführt und mit den abgebogenen Enden des Querträgers 25 verschraubt sind. Von dem Schwenklager 21 aus erstrecken sich die Schwenkhebel 17 mit den Abschnitten 18 in Richtung zur Vorderseite des Sitzes 14 und sind etwa unterhalb der Mitte des Sitzes 14 mit dem Lagerbock 10 drehbar verbunden, wie die Drehlager 12 zeigen. Von dem Schwenklager 21 aus erstrecken sich die Schwenkhebel 17 in Richtung zur Rückseite des Sitzes 14 und verlaufen in der Ausgangsstellung des Stuhles mit den Abschnitten 19 etwa horizontal. Die Abschnitte 19 erstrecken sich über die hintere Kante des Sitzes 14 hinaus und gehen in die etwa rechtwinklig nach oben abgebogenen Abschnitte 20 über. An diesen Abschnitten 20 ist die Rückenlehne 22 fest angebracht, von der auch nur der Rückenlehnenträger gezeigt ist. Die Abschnitte 18 und 19 der Schwenkhebel 17 schließen zur Standfläche des Stuhles hin einen Winkel α von etwa 150° bis etwa 170° ein.As shown in FIG. 2, the two pivot levers 17 in the region of the pivot bearing 21, the two
Wie Fig. 2 zeigt, sind die Abschnitte 20 der Schwenkhebel 17 über den Querträger 27 fest miteinander verbunden. Die Gasfeder 24 stützt sich am hinteren Ende des Lagerbockes 10 und an dem Querträger 27 gelenkig ab, wie die Gelenke 13 und 23 zeigen. Die Gasfeder 24 drückt die Schwenkhebel 17 entgegen dem Uhrzeigersinn um die Schwenklager 21 nach oben, bis die Abschnitte 19 an der Unterseite des Sitzes 14 anliegen und der Stuhl seine Ausgangsstellung einnimmt. Am vorderen Ende des Lagerbockes 10 ist der Querträger 26 angebracht, der mit seinen Enden rechtwinklig nach unten abgewinkelt ist. In den abgewinkelten Enden sind die Langlöcher 11 eingebracht. Die Laschen 15 des Sitzes 14 überdecken die Enden des Querträgers 26 auf deren Außenseiten. Schrauben bilden die Schwenkachse, die von den Innenseiten der Enden des Querträgers 26 in die Langlöcher 11 eingeführt und in Gewindebohrungen der Laschen 15 eingeschraubt sind.As FIG. 2 shows, the
In Fig. 3 ist neben der Ausgangsstellung des Stuhles mit dem Sitz 14 und der Rückenlehne 22 auch die abgesenkte Stellung des Sitzes 14′ und der nach hinten geneigten Rückenlehne 22′ eingezeichnet. Dabei ist deutlich zu erkennen, daß sich der Abstand der einander zugekehrten Enden von Sitz 14 und Rückenlehne 22 beim Einstellen in die abgesenkte Stellung ändert, wie anhand des Sitzes 14′ und der Rückenlehne 22′ gezeigt ist. So kann dieser Abstand von 62 mm z.B. bis auf etwa 30 mm reduziert werden. Die horizontale Neigung des Sitzes 14 von etwa 2° kann bis auf etwa 6° zunehmen, wobei der Sitz 14 stets zur Rückenlehne 22 bzw. 22′ hin abfällt. Hatte die Rückenlehne 22 in der Ausgangsstellung eine Neigung von etwa 7°, dann ist diese Neigung in der abgesenkten Stellung auf etwa 18° angestiegen, d.h. die Neigung der Rückenlehne 22 hat gegenüber der Neigung des Sitzes 14 überproportional zugenommen. Bei der Absenkung des Sitzes 14 verschiebt sich die horizontale Schwenkachse 28 des Sitzes 14 in den Langlöchern 11 zu den unteren, hinteren Enden der Langlöcher 11 hin in die Stellung 28′, wodurch eine Art Gegenbewegung des Sitzes 14 um die Schwenklager 21 ausgeführt wird, die letztlich für die Relativbewegung zwischen Sitz 14 und Rückenlehne 22 mit verantwortlich ist. Die Schwenklager 21 verlagern ihre Position nach 21′ und die Schwenkhebel 17 werden um die Drehlager 12 verschwenkt, bis sie ihre gestrichelte Stellung 17′ einnehmen. Die Gasfeder 24 wird dabei zusammengedrückt, da das Gelenk 13 seine Lage beibehält und das Gelenk 23 in die Stellung 23′ abgesenkt wird. Die Abschnitte der Schwenkhebel 17 nehmen in der abgesenkten Stellung die Positionen 18′, 19′ und 20′ ein.In Fig. 3, in addition to the initial position of the chair with the
Die Gasfeder 24 übt eine Rückstellkraft auf die Schwenkhebel 17 aus, die den Sitz 14 und die Rückenlehne in die Ausgangsstellung zurückstellt. Die Rückstellkraft kann auch mittels Drehstabfedern 29 aufgebracht werden, die in die Drehlager 12 eingebracht sind. Auch die Schwenkachse 28 kann derartige Drehstabfedern aufnehmen. Die Schwenklager 21 können auch mittels einer Druckfeder 30 am Lagerbock 10 abgestützt sein, die die Rückstellkraft auf die Schwenkhebel 17 und den Sitz 14 ausübt.The
Claims (5)
- Chair, more especially a work-chair or office chair, including a seat, which is pivotable about a horizontal pivot axis in its front region and is variable in respect of its inclination, and a back-rest, which is necessarily disproportionately variable in respect of its inclination in dependence on the change in inclination of the seat, wherein the ends of the seat (14) and back-rest (22), which face one another, come closer to one another with an increasing inclination of the seat, the seat being displaceable with its pivot axis in rearwardly inclined guide members in a direction towards the back-rest, and wherein the seat (14) is pivotally connected to portions (18, 19) of pivotal levers (17) remote from the rear end of the seat, said portions extending beneath the seat and being rotatably mounted on the bearing block (10) of the chair frame, said portions extending beyond the rear edge of the seat (14) and protruding into portions (20), which are bent upwardly substantially at right angles and have the back-rest mounted thereon, characterised in that the pivot axis (28) of the seat (14) is guided on the bearing block (10) so as to be displaceable to a limited extent in elongate slots (11), and in that the portions (18, 19), which extend beneath the seat (10), form an obtuse angle (α) towards the base of between approximately 150° and 170° relative to one another, the pivotal connection of the seat being disposed at the transitional location between the two portions (18, 19), and the rotatable support on the bearing block (10) being disposed on the oppositely situated free end region of the portion (18).
- Chair according to claim 1, characterised in that the bearing block (10) ascends towards the pivot axis (28) of the seat (14) at an angle of substantially 20°.
- Chair according to claim 1 or 2, characterised in that the pivotal levers (17) are interconnected in the region of the portions (20), which support the back-rest (22), by means of a cross-piece member (27), and in that a gas spring (24) is pivotally supported on the bearing block (10) and the cross-piece member (27) by pivot joints (13, 23).
- Chair according to claim 1 or 2, characterised in that a torsion bar spring (29) is disposed in the rotary bearings (12) between the pivotal levers (17) and the bearing block (10).
- Chair according to claim 1 or 2, characterised in that the pivot bearings (21) between the seat (14) and the pivotal levers (17) are supported on the bearing block (10) by means of a compression spring (30).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3916474 | 1989-05-20 | ||
| DE19893916474 DE3916474A1 (en) | 1989-05-20 | 1989-05-20 | CHAIR, ESPECIALLY WORK OR OFFICE CHAIR |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0399251A1 EP0399251A1 (en) | 1990-11-28 |
| EP0399251B1 true EP0399251B1 (en) | 1995-03-15 |
Family
ID=6381056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19900108266 Expired - Lifetime EP0399251B1 (en) | 1989-05-20 | 1990-04-30 | Chair, particularly work- or office-chair |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5308144A (en) |
| EP (1) | EP0399251B1 (en) |
| JP (1) | JP2791708B2 (en) |
| CA (1) | CA2017148C (en) |
| DE (2) | DE3916474A1 (en) |
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| DE3838999A1 (en) * | 1988-11-18 | 1990-05-23 | Roeder Gmbh | CHAIR, ESPECIALLY WORK OR OFFICE CHAIR |
| DE4038059A1 (en) * | 1990-11-29 | 1992-06-04 | Bock Martin Kunststoff | SEAT CARRIER FOR AN OFFICE CHAIR OR THE LIKE |
| JP3330145B2 (en) * | 1991-05-21 | 2002-09-30 | 株式会社イトーキ | Interlocking support mechanism for chair back and seat |
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| DE4135092A1 (en) * | 1991-10-24 | 1993-04-29 | Bayerische Motoren Werke Ag | Motor vehicle seat with interlinked backrest and seat base - which alters angles of backrest and seat simultaneously |
| DE4208648C1 (en) * | 1992-03-18 | 1993-05-27 | Roeder Gmbh Sitzmoebelwerke, 6000 Frankfurt, De | |
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| AT402602B (en) * | 1995-02-28 | 1997-07-25 | Eckhard Hansen Dipl Ing | CHAIR CHAIR |
| US5775774A (en) * | 1996-08-12 | 1998-07-07 | Okano; Hiroshi | Tilt mechanism for chairs |
| DE19702328A1 (en) * | 1997-01-23 | 1998-07-30 | Comforto Gmbh | Chair with synchronous mechanism |
| JP3136280B2 (en) * | 1997-04-28 | 2001-02-19 | 株式会社いのうえアソシエーツ | Chair |
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| US5979984A (en) * | 1997-10-24 | 1999-11-09 | Steelcase Development Inc. | Synchrotilt chair with forwardly movable seat |
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| DE19927691A1 (en) * | 1999-06-17 | 2000-12-28 | Koenig & Neurath Ag | Office chair comprises support, seat and back section which can be pivoted to inclined position, back being mounted on pivot near middle of chair and second pivot nearer rear, first pivot being on same level as, or higher than, second |
| DE10026292C2 (en) * | 1999-07-06 | 2003-03-20 | Roeder Peter | chair |
| DE19950923A1 (en) * | 1999-10-21 | 2001-04-26 | Interstuhl Bueromoebel Gmbh | Reclining office chair has seat connected directly to frame at front and via lever at the back, spring below seat being connected to lever and to second arm providing resilience |
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| DE10122946C1 (en) * | 2001-05-11 | 2003-01-30 | Armin Sander | Chair, especially office chair |
| DE10122945A1 (en) * | 2001-05-11 | 2002-12-12 | Armin Sander | Chair, especially office chair |
| DE10122948C1 (en) | 2001-05-11 | 2003-03-13 | Armin Sander | Chair, especially office chair |
| DE10125994A1 (en) * | 2001-05-18 | 2002-11-21 | Bock 1 Gmbh & Co | Synchronous mechanism for a correlated movement of the seat backrest of an office chair |
| US20030132653A1 (en) * | 2001-10-18 | 2003-07-17 | Doug Thole | Tension control mechanism for a chair |
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| TWI260977B (en) * | 2005-02-05 | 2006-09-01 | Tung Yu O A Co Ltd | Chair seat with slipping function |
| DE202005004880U1 (en) | 2005-03-26 | 2006-08-03 | Sander, Armin | Chair, especially office chair |
| WO2007127740A2 (en) * | 2006-04-24 | 2007-11-08 | Humanscale Corporation | Chair having an automatically adjusting resistance to tilting |
| KR101539468B1 (en) | 2007-01-29 | 2015-07-24 | 허만 밀러 인코포레이티드 | Seating structure and methods for the use thereof |
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| NO326574B1 (en) | 2007-03-13 | 2009-01-12 | Sapdesign As | Device by chair with adjustable angle between chair seat and back |
| DE502008002234D1 (en) * | 2007-07-07 | 2011-02-17 | Koenig & Neurath Ag | CHAIR, ESPECIALLY OFFICE CHAIR |
| WO2011137530A1 (en) | 2010-05-05 | 2011-11-10 | Eberhard Von Huene & Associates Inc. | Moveable and demountable wall panel system for butt-glazed wall panels |
| EP2750552B1 (en) | 2011-09-21 | 2018-03-14 | Herman Miller, Inc. | Bi-level support, body support structure and method of supporting a user's cranium |
| US20130175841A1 (en) * | 2012-01-11 | 2013-07-11 | James W. Finck | Reclining seat assembly |
| US9504326B1 (en) | 2012-04-10 | 2016-11-29 | Humanscale Corporation | Reclining chair |
| US9833075B2 (en) | 2012-09-05 | 2017-12-05 | Godrej & Boyce Mfg Co Ltd | Chair with adjustable backrest and seat |
| CA2906736C (en) | 2013-03-15 | 2021-11-02 | Hni Technologies Inc. | Chair with activated back flex |
| PL2896325T3 (en) * | 2014-01-20 | 2018-07-31 | L&P Property Management Company | Tilt mechanism for a seating furniture and seating furniture including the same |
| CN103876498B (en) * | 2014-03-26 | 2016-08-24 | 汕头市丽时家具有限公司 | Chair underframe and the seat with this Chair underframe |
| CN106455821A (en) | 2014-04-17 | 2017-02-22 | Hni技术公司 | Chair and chair control assemblies, systems, and methods |
| USD731833S1 (en) | 2014-04-17 | 2015-06-16 | Allsteel Inc. | Chair |
| WO2015160693A1 (en) | 2014-04-17 | 2015-10-22 | Hni Technologies Inc. | Flex lumbar support |
| USD743180S1 (en) | 2014-10-15 | 2015-11-17 | Hni Technologies Inc. | Chair |
| US9801470B2 (en) | 2014-10-15 | 2017-10-31 | Hni Technologies Inc. | Molded chair with integrated support and method of making same |
| NO339052B1 (en) * | 2014-10-27 | 2016-11-07 | Sykkylven Staal As | Seating furniture arrangement |
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| BR112017022038B1 (en) | 2015-04-13 | 2021-11-03 | Steelcase Inc. | SEAT ARRANGEMENT |
| US10194750B2 (en) | 2015-04-13 | 2019-02-05 | Steelcase Inc. | Seating arrangement |
| AU2020224628A1 (en) | 2019-02-21 | 2021-08-26 | Steelcase Inc. | Body support assembly and methods for the use and assembly thereof |
| US11357329B2 (en) | 2019-12-13 | 2022-06-14 | Steelcase Inc. | Body support assembly and methods for the use and assembly thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0176816A1 (en) * | 1984-10-03 | 1986-04-09 | Giroflex-Entwicklungs AG | Chair with reclining seat and backrest support |
| EP0237825A2 (en) * | 1986-03-15 | 1987-09-23 | Drabert Söhne GmbH & Co. | Sitting-furniture |
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| CH661647A5 (en) * | 1981-08-19 | 1987-08-14 | Giroflex Entwicklungs Ag | Chair |
| DE3372059D1 (en) * | 1983-10-05 | 1987-07-23 | Giroflex Entwicklungs Ag | Chair with an inclinable seat and back-rest |
| DE8515221U1 (en) * | 1985-05-23 | 1986-05-22 | VOKO - Franz Vogt & Co, 6301 Pohlheim | Seating |
| DE3634055A1 (en) * | 1986-10-07 | 1988-04-14 | Inaba Seisakusho Ltd | SEAT FURNITURE |
| DE3805771A1 (en) * | 1987-02-25 | 1988-09-08 | Koehl Gmbh | Arrangement for synchronous adjustment of the inclinations of the seat and back of a swivel chair or armchair |
| DE3724582A1 (en) * | 1987-07-24 | 1989-02-02 | Inaba Seisakusho Ltd | A piece of seating furniture |
| EP0303720B1 (en) * | 1987-08-14 | 1991-04-10 | Grammer Ag | Seat, in particular a work seat such as an office chair or vehicle seat |
| DE8713972U1 (en) * | 1987-10-17 | 1987-11-26 | Nikov, Ljubomir, 6457 Maintal | Chair or armchair with synchronously adjustable inclination of backrest and seat |
| DE8814409U1 (en) * | 1988-11-18 | 1989-01-26 | Roeder GmbH, 6000 Frankfurt | Chair, especially work or office chair |
-
1989
- 1989-05-20 DE DE19893916474 patent/DE3916474A1/en active Granted
-
1990
- 1990-04-30 DE DE59008692T patent/DE59008692D1/en not_active Expired - Fee Related
- 1990-04-30 EP EP19900108266 patent/EP0399251B1/en not_active Expired - Lifetime
- 1990-05-18 JP JP12702990A patent/JP2791708B2/en not_active Expired - Lifetime
- 1990-05-18 CA CA 2017148 patent/CA2017148C/en not_active Expired - Fee Related
-
1991
- 1991-07-15 US US07/730,243 patent/US5308144A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0176816A1 (en) * | 1984-10-03 | 1986-04-09 | Giroflex-Entwicklungs AG | Chair with reclining seat and backrest support |
| EP0237825A2 (en) * | 1986-03-15 | 1987-09-23 | Drabert Söhne GmbH & Co. | Sitting-furniture |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0399251A1 (en) | 1990-11-28 |
| JPH034807A (en) | 1991-01-10 |
| US5308144A (en) | 1994-05-03 |
| CA2017148C (en) | 2001-04-10 |
| DE3916474A1 (en) | 1990-11-22 |
| DE3916474C2 (en) | 1992-02-13 |
| JP2791708B2 (en) | 1998-08-27 |
| DE59008692D1 (en) | 1995-04-20 |
| CA2017148A1 (en) | 1990-11-20 |
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