EP1906792B1 - Chair, especially office chair - Google Patents

Chair, especially office chair Download PDF

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Publication number
EP1906792B1
EP1906792B1 EP06762680A EP06762680A EP1906792B1 EP 1906792 B1 EP1906792 B1 EP 1906792B1 EP 06762680 A EP06762680 A EP 06762680A EP 06762680 A EP06762680 A EP 06762680A EP 1906792 B1 EP1906792 B1 EP 1906792B1
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EP
European Patent Office
Prior art keywords
seat
backrest
rotary bearing
chair according
chair
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EP06762680A
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German (de)
French (fr)
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EP1906792A1 (en
Inventor
Martin Potrykus
Armin Sander
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Koenig and Neurath AG
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Koenig and Neurath AG
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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
    • A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
    • A47C31/12—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons
    • A47C31/126—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons for 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
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers

Definitions

  • the invention relates to a chair, in particular an office chair, with a synchronous mechanism.
  • Modern high-quality office chairs are usually equipped with a synchronous mechanism, which ensures that the seat moves synchronously with the backrest.
  • the synchronizing mechanism is usually formed by a backrest support, which is arranged on a central support frame, is movably connected to the seat.
  • the movements of the backrest carrier are transmitted in synchronous movements of the seat.
  • a synchronous mechanism offer different possibilities. For example, from the DE 101 22 948 C1 an office chair removable, the seat inclines with a deflection of the backrest to the back towards the back. From the DE 42 19 599 C2 is an office chair removable, the seat is tilted forward with a deflection of the backrest to the rear. In both chairs shown, it is necessary to adjust the counteracting force for an inclination of the backrest according to the weight of a seated person.
  • a chair in particular an office chair, with a hinged to a support frame via a backrest support and a synchronous movable seat, which is connected in a Aufddling about a seat handlebar pivotally connected to the support frame, the backrest support and the Seat link are each rotatably mounted on the support frame, and wherein a pull rod such that the seat link is movably connected to the backrest support, that a rearward tilting movement of the backrest is translated at the Aufddling in an upward pivotal movement of the seat.
  • the invention is based in a first step on the consideration that the weight of a seated person is directed vertically downwards. If the tilting or rotary movement of the backrest is coupled directly to the seat surface via a suitably designed backrest support, then only the component which is tangential with respect to the rotational movement in the attachment point acts from the weight force. But this is the counter-force of the backrest acting against the seated person depends on their inclination.
  • the invention proceeds from the consideration of overcoming this disadvantage by movably connecting a seat link which directs the seat surface to the backrest support via a pull rod.
  • a seat link which directs the seat surface to the backrest support via a pull rod.
  • the rotation of the backrest and thus of the backrest support is transmitted via the pull rod to a rotational movement of the seat link.
  • the coupling via the pull rod offers additional mechanical degrees of freedom which allow the backrest to tilt in a certain range to implement desired upward movement of the seat.
  • Such mechanical degrees of freedom are the length of the drawbar, the location of the attachment points of the drawbar on the backrest support and the seat link and the position of the backrest support to the seat link.
  • the basic principle acting here is based on the fact that, in the case of a coupling of a rotary movement with a movable drawbar, the movement effected per rotation angle parallel to the pull rod is in turn dependent on the absolute rotational position.
  • the described Coupling between seat link and backrest support with a pull rod can therefore be used to compensate for the described undesirable dependence of the generated per angular difference of the backrest stroke of the seat of the absolute inclination angle of the backrest.
  • the backrest support is rotatably mounted on the support frame via a pivot bearing and has a pivot bearing on which the pull rod is rotatably mounted, wherein the pivot bearing in which the pull rod is mounted, in the direction of the seat link before and in the direction of the seat over the Rotary bearing is arranged over which the backrest support is attached.
  • This geometry ensures that a rearward tilting movement of the backrest support leads from the beginning to an offset of the drawbar.
  • About the coupling of the drawbar to the seat handlebars steering the seat can be achieved in this way a favorable for the automatic weight increase the increase of the seat.
  • the backrest support on an angled pivot arm on which the pull rod is rotatably mounted By means of an angled pivoting arm, the angle position between the drawbar and the tangent of the rotational movement of the backrest support can be set to save material in the initial or resting state of the chair in the attachment point.
  • the seat link is rotatably mounted on the seat. This allows for a rotational movement of the seat link relative to the support frame maintaining the orientation of the seat.
  • the seat link is designed as a joint element, in particular as a hinge plate, with a first, a second and a third pivot bearing. About the first and the second pivot bearing the seat is connected to the support frame. In the third pivot bearing the drawbar is mounted.
  • This embodiment is cost-effective and allows a mechanically simple, movable coupling between the seat and the support frame.
  • the seat is guided in a spaced from the Auftician further Aufddling by means of a support frame mounted on the support member such that in an upward pivotal movement at the Auftician an overall tilt of the seat is effected towards the backrest.
  • the increasing forward inclination of the seat back pressure of the seated person is absorbed by the appropriately oriented inclination of the seat. Slipping of the seated person is thus prevented.
  • the guidance of the seat by means of the seat guide element in a further Auf Vietnamese allows a great deal of freedom in the design of the desired synchronous movement of the seat with respect to the deflection of the backrest.
  • the seat link and the seat guide element cooperate in such a way that raised by a rearward tilting movement of the backrest of the Auf Vietnamese and the other Auf Vietnamese is pushed backwards up.
  • the Auftician raised in a rotational movement and the other Auftician is pushed by the rotational movement, a slight embodiment of the raising of the seat with a desired inclination curve is possible.
  • the seat guide element is designed as a slotted guide.
  • the slotted guide allows in addition to the leadership in accordance with the predetermined link shape as a further degree of freedom a rotational movement. As a result, the movement of the seat can be influenced and predetermined within certain limits in a simple manner.
  • the slide guide on a curved guide. Due to the curvature, the progression of the increase of the further point of the seat is adjustable. This can be in conjunction with the upward pivoting movement of the front point of the movement course of the seat as such predetermined.
  • the slotted guide on a linear guide is low feasible.
  • a progression of the upward movement of the further point can also be achieved with a linear guide in such a way that the seat surface inclines when the backrest is deflected and, in addition, the more the overall height increases with increasing deflection of the backrest.
  • the connecting line between the third pivot bearing and the first pivot bearing with the connecting line between the third pivot bearing and the pivot bearing in which the tie rod is mounted approximately includes a right angle and the connecting line between the pivot bearing for mounting the drawbar and the third pivot bearing with the connecting line between the pivot bearing in which the drawbar is mounted, and the pivot bearing in which the backrest support is mounted, an angle of more than 90 ° , in particular more than 120 °.
  • a further stable variant of the synchronization mechanism is arranged in total mirror-symmetrical to both sides of the seat. It is particularly expedient to form the joint elements as flat hinge plates.
  • Fig. 1 shows in a side view schematically an office chair 1, which has a seat 3 and a backrest 5.
  • the chair 1 also has a central chair column 7, which - not shown - by a pedestal, especially a bogie with wheels, is worn.
  • a central support frame 8 is arranged, on which the seat surface 3 and the backrest 5 are articulated via a seat link 9 or a backrest support 10.
  • the backrest support 10 is rotatably mounted on the pivot bearing 11 to the support frame 8.
  • the seat 3 is also rotatably mounted in a first pivot bearing 17 on the support frame 8 via the seat link 9 designed as a joint element 13.
  • the joint element 13 has, in addition to the first pivot bearing 17, a second pivot bearing 18 and a third pivot bearing 19.
  • the seat surface 3 is mounted in a Auftician 15, so that the seat surface 3 can perform a total pivoting movement relative to the support frame 8.
  • the joint member 9 engages a tie rod 22, whose other end is connected via the pivot bearing 23 with an angled pivot arm 25 of the back support 10.
  • the seat 3 is connected via a slotted guide 30 on the support frame 8.
  • the operation of the office chair 1 is from a comparison of Fig. 1 and 2 seen. While Fig. 1 - which mentions - the office chair 1 shows at rest, is in Fig. 2 the office chair 1 shown in deflected form.
  • the pivot arm 25 moves according to the performed tilt of the backrest 5 by about one hour. It is at the end of the movement according to the in Fig. 2 assumed position of the office chair 1, the pull rod 22 is aligned tangentially to the rotational movement of the pivot arm 25.
  • the backrest 5 is possible such that the force acting on the backrest 5 in addition heavy weight of the seated person is taken into account.
  • the counterpressure automatically adapts to the body weight of the seated person via the synchronization mechanism.
  • Fig. 3 shows in a side view schematically an office chair 1 ', wherein the further Auftician 27 of the seat surface 3 moves in deflection of the backrest support 10 in a linear slotted guide 30' to the right.
  • the linear slotted guide 30 ' is designed so that the seating surface 3 tends to the backrest 5 with progressive movement of the backrest and is increasingly raised overall.

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

Abstract

Disclosed is a chair, especially an office chair (1), comprising a backrest (5) that is hinged to a load-bearing frame (8) via a backrest support (10), and a sitting area (3) which is movable in synchrony with the backrest (5) and is pivotally connected to the load-bearing frame (8) in a supporting point (15) via a seat guide (9). The backrest support (10) and the seat guide (9) are rotatably fixed to the load-bearing frame (8). A connecting rod (22) movably connects the seat guide (9) to the backrest support (10) in such a way that a rearward tilting movement of the backrest (5) is translated into an upward swiveling movement of the sitting area (3) at the supporting point (15). Such a design creates an automatic weight-shifting mechanism which allows the counterforce applied by the backrest (5) to be maintained substantially regardless of the absolute inclination.

Description

Die Erfindung betrifft einen Stuhl, insbesondere einen Bürostuhl, mit einer Synchronmechanik.The invention relates to a chair, in particular an office chair, with a synchronous mechanism.

Moderne hochwertige Bürostühle sind üblicherweise mit einer Synchronmechanik versehen, die dafür sorgt, dass sich die Sitzfläche synchron mit der Rückenlehne bewegt. Die Synchronmechanik wird üblicherweise gebildet von einem Lehnenträger, der an einem zentralen Trägergestell angeordnet, beweglich mit dem Sitz verbunden ist. Dadurch werden die Bewegungen des Lehnenträgers in synchrone Bewegungen der Sitzfläche übertragen. Für die Ausgestaltung einer Synchronmechanik bieten sich unterschiedliche Möglichkeiten an. So ist beispielsweise aus der DE 101 22 948 C1 ein Bürostuhl entnehmbar, dessen Sitzfläche sich mit einer Auslenkung der Rückenlehne nach hinten zur Rückenlehne hin neigt. Aus der DE 42 19 599 C2 ist ein Bürostuhl entnehmbar, dessen Sitzfläche sich mit einer Auslenkung der Rückenlehne nach hinten entgegengesetzt nach vorne neigt. Bei beiden gezeigten Stühlen ist es erforderlich, die für eine Neigung der Rückenlehne zu überwindende Gegenkraft entsprechend dem Gewicht einer sitzenden Person einzustellen.Modern high-quality office chairs are usually equipped with a synchronous mechanism, which ensures that the seat moves synchronously with the backrest. The synchronizing mechanism is usually formed by a backrest support, which is arranged on a central support frame, is movably connected to the seat. As a result, the movements of the backrest carrier are transmitted in synchronous movements of the seat. For the design of a synchronous mechanism offer different possibilities. For example, from the DE 101 22 948 C1 an office chair removable, the seat inclines with a deflection of the backrest to the back towards the back. From the DE 42 19 599 C2 is an office chair removable, the seat is tilted forward with a deflection of the backrest to the rear. In both chairs shown, it is necessary to adjust the counteracting force for an inclination of the backrest according to the weight of a seated person.

Aus der US 6,709,058 B1 ist ein Bürostuhl bekannt, bei dem sich die einer Neigung entgegenwirkende Kraft der Rückenlehne mechanisch dem Gewicht einer sitzenden Person anpasst. Hierzu ist der Lehnenträger über einen Drehpunkt am Trägergestell hinaus aufwärts unter die Sitzfläche gebogen. Durch diese Biegung in Kombination mit dem Drehpunkt wird eine rückwärtige Kippbewegung der Rückenlehne über den Lehnenträger in eine Aufwärtsbewegung der Sitzfläche umgesetzt. Da der auf die Sitzfläche wirkende Aufpunkt des Lehnenträgers eine Drehbewegung ausführt, ist die der sitzenden Person von der Rückenlehne entgegengesetzte Kraft abhängig von der absoluten Neigungsstellung des Lehnenträgers.From the US 6,709,058 B1 An office chair is known in which the tilting force of the backrest mechanically adapts to the weight of a seated person. For this purpose, the backrest support is bent over a pivot point on the support frame out up under the seat. By this bend in combination with the fulcrum, a rearward tilting movement of the backrest on the backrest support is converted into an upward movement of the seat. Since the acting on the seat Aufpunkt the backrest support performs a rotational movement, the seated person from the backrest opposite force is dependent on the absolute inclination of the backrest support.

Es ist Aufgabe der Erfindung, einen Stuhl der eingangs genannten Art anzugeben, der eine alternative Mechanik zur automatischen Anpassung der von der Rückenlehne einer Neigung entgegenwirkenden Kraft auf das Gewicht der sitzenden Person aufweist.It is an object of the invention to provide a chair of the type mentioned, which has an alternative mechanism for automatically adjusting the counteracting of the backrest of a force on the weight of the seated person.

Diese Aufgabe wird erfindungsgemäß durch einen Stuhl, insbesondere einen Bürostuhl, mit einer an einem Trägergestell über einen Lehnenträger angelenkten Rückenlehne sowie einer hierzu synchron bewegbaren Sitzfläche, die in einem Aufpunkt über einen Sitzlenker schwenkbar an das Trägergestell angebunden ist, gelöst, wobei der Lehnenträger und der Sitzlenker jeweils drehbar an dem Trägergestell befestigt sind, und wobei eine Zugstange den Sitzlenker mit dem Lehnenträger derart beweglich verbindet, dass eine nach hinten gerichtete Kippbewegung der Rückenlehne an dem Aufpunkt in eine aufwärtige Schwenkbewegung der Sitzfläche übersetzt wird.This object is achieved by a chair, in particular an office chair, with a hinged to a support frame via a backrest support and a synchronous movable seat, which is connected in a Aufpunkt about a seat handlebar pivotally connected to the support frame, the backrest support and the Seat link are each rotatably mounted on the support frame, and wherein a pull rod such that the seat link is movably connected to the backrest support, that a rearward tilting movement of the backrest is translated at the Aufpunkt in an upward pivotal movement of the seat.

Die Erfindung geht dabei in einem ersten Schritt von der Überlegung aus, dass die Gewichtskraft einer sitzenden Person vertikal nach unten gerichtet ist. Wird über einen entsprechend gestalteten Lehnenträger die Kipp- oder Drehbewegung der Rückenlehne direkt mit der Sitzfläche gekoppelt, so wirkt von der Gewichtskraft nur die bezüglich der Drehbewegung im Aufpunkt tangentiale Komponente. Damit ist aber die gegen die sitzende Person wirkende Gegenkraft der Rückenlehne von ihrer Neigung abhängig.The invention is based in a first step on the consideration that the weight of a seated person is directed vertically downwards. If the tilting or rotary movement of the backrest is coupled directly to the seat surface via a suitably designed backrest support, then only the component which is tangential with respect to the rotational movement in the attachment point acts from the weight force. But this is the counter-force of the backrest acting against the seated person depends on their inclination.

In einem weiteren Schritt geht die Erfindung von der Überlegung aus, zur Überwindung dieses Nachteils einen die Sitzfläche lenkenden Sitzlenker mit dem Lehnenträger über eine Zugstange beweglich zu verbinden. Somit wird die Drehbewegung der Rückenlehne und damit des Lehnenträgers über die Zugstange auf eine Drehbewegung des Sitzlenkers übertragen Dabei bietet die Kopplung über die Zugstange im Unterschied zu einer direkten Kopplung zusätzliche mechanische Freiheitsgrade, die es erlauben, in einem gewissen Bereich die Neigung der Rückenlehne in eine gewünschte Aufwärtsbewegung der Sitzfläche umzusetzen. Derartige mechanische Freiheitsgrade sind die Länge der Zugstange, der Ort der Befestigungspunkte der Zugstange am Lehnenträger und am Sitzlenker sowie die Stellung des Lehnenträgers zu dem Sitzlenker. Das hierbei wirkende Grundprinzip beruht darauf, dass im Falle einer Kopplung einer Drehbewegung mit einer beweglichen Zugstange die pro Drehwinkel parallel zur Zugstange bewirkte Bewegung wiederum abhängig von der absoluten Drehstellung ist. Die beschriebene Kopplung zwischen Sitzlenker und Lehnenträger mit einer Zugstange kann also zur Kompensation der beschriebenen unerwünschten Abhängigkeit des pro Winkeldifferenz der Rückenlehne erzeugten Hubs der Sitzfläche von dem absoluten Neigungswinkel der Rückenlehne eingesetzt werden.In a further step, the invention proceeds from the consideration of overcoming this disadvantage by movably connecting a seat link which directs the seat surface to the backrest support via a pull rod. Thus, the rotation of the backrest and thus of the backrest support is transmitted via the pull rod to a rotational movement of the seat link. In contrast to a direct coupling, the coupling via the pull rod offers additional mechanical degrees of freedom which allow the backrest to tilt in a certain range to implement desired upward movement of the seat. Such mechanical degrees of freedom are the length of the drawbar, the location of the attachment points of the drawbar on the backrest support and the seat link and the position of the backrest support to the seat link. The basic principle acting here is based on the fact that, in the case of a coupling of a rotary movement with a movable drawbar, the movement effected per rotation angle parallel to the pull rod is in turn dependent on the absolute rotational position. The described Coupling between seat link and backrest support with a pull rod can therefore be used to compensate for the described undesirable dependence of the generated per angular difference of the backrest stroke of the seat of the absolute inclination angle of the backrest.

Vorteilhafterweise ist der Lehnenträger über ein Drehlager an dem Trägergestell drehbar befestigt und weist ein Drehlager auf, an dem die Zugstange drehbar gelagert ist, wobei das Drehlager, in dem die Zugstange gelagert ist, in Richtung auf den Sitzlenker vor und in Richtung zur Sitzfläche über dem Drehlager angeordnet ist über welches der Lehnenträger befestigt ist. Durch diese Geometrie wird erreicht, dass eine nach hinten gerichtete Kippbewegung des Lehnenträgers von Beginn an zu einem Versatz der Zugstange führt. Über die Kopplung der Zugstange an den die Sitzfläche lenkenden Sitzlenker kann auf diese Weise ein für die Gewichtsautomatik günstiger Verlauf der Anhebung der Sitzfläche erreicht werden.Advantageously, the backrest support is rotatably mounted on the support frame via a pivot bearing and has a pivot bearing on which the pull rod is rotatably mounted, wherein the pivot bearing in which the pull rod is mounted, in the direction of the seat link before and in the direction of the seat over the Rotary bearing is arranged over which the backrest support is attached. This geometry ensures that a rearward tilting movement of the backrest support leads from the beginning to an offset of the drawbar. About the coupling of the drawbar to the seat handlebars steering the seat can be achieved in this way a favorable for the automatic weight increase the increase of the seat.

Vorteilhafterweise weist der Lehnenträger einen abgewinkelten Schwenkarm auf, an dem die Zugstange drehbar gelagert ist. Mittels eines abgewinkelten Schwenkarms kann im Ausgangs- oder Ruhezustand des Stuhls im Befestigungspunkt die Winkelstellung zwischen der Zugstange und der Tangente der Drehbewegung des Lehnenträgers Material sparend festgelegt werden.Advantageously, the backrest support on an angled pivot arm on which the pull rod is rotatably mounted. By means of an angled pivoting arm, the angle position between the drawbar and the tangent of the rotational movement of the backrest support can be set to save material in the initial or resting state of the chair in the attachment point.

Zweckmäßigerweise ist der Sitzlenker drehbar an der Sitzfläche gelagert. Dies erlaubt bei einer Drehbewegung des Sitzlenkers gegenüber dem Trägergestell eine Beibehaltung der Ausrichtung der Sitzfläche.Conveniently, the seat link is rotatably mounted on the seat. This allows for a rotational movement of the seat link relative to the support frame maintaining the orientation of the seat.

In einer vorteilhaften Ausgestaltung der Erfindung ist der Sitzlenker als ein Gelenkelement, insbesondere als eine Gelenkplatte, mit einem ersten, einem zweiten und einem dritten Drehlager ausgebildet. Über das erste und das zweite Drehlager ist die Sitzfläche mit dem Trägergestell verbunden. In dem dritten Drehlager ist die Zugstange gelagert. Diese Ausgestaltung ist zum einen kostengünstig und erlaubt eine mechanisch einfache, bewegliche Kopplung zwischen der Sitzfläche und dem Trägergestell.In an advantageous embodiment of the invention, the seat link is designed as a joint element, in particular as a hinge plate, with a first, a second and a third pivot bearing. About the first and the second pivot bearing the seat is connected to the support frame. In the third pivot bearing the drawbar is mounted. This embodiment is cost-effective and allows a mechanically simple, movable coupling between the seat and the support frame.

Über den Abstand des dritten Drehlagers von den beiden anderen Drehlagern kann der pro Zugstangenversatz bewirkte Drehwinkel des Gelenkelements eingestellt werden. Dabei ist wiederum das Verhältnis aus bewirktem Drehwinkel und Zugstangenversatz abhängig von der absoluten Drehposition des Gelenkelements.About the distance of the third pivot bearing of the other two pivot bearings caused by each tie rod rotation angle of the joint element can be adjusted. Again, the ratio of the angle of rotation and the tie rod offset depends on the absolute rotational position of the joint element.

In einer weiteren vorteilhaften Ausgestaltung der Erfindung ist die Sitzfläche in einem vom Aufpunkt beabstandeten weiteren Aufpunkt mittels eines an dem Trägergestell gelagerten Sitzführungselements derart geführt, dass bei einer aufwärtigen Schwenkbewegung an dem Aufpunkt insgesamt eine Neigung der Sitzfläche hin zur Rückenlehne bewirkt ist. Bei einer solchen Konstruktion wird der mit zunehmender Neigung der Rückenlehne wachsende nach vorne gerichtete Druck der sitzenden Person durch die entsprechend ausgerichtete Neigung der Sitzfläche aufgefangen. Ein Verrutschen der sitzenden Person wird somit verhindert. Die Führung der Sitzfläche mittels des Sitzführungselements in einem weiteren Aufpunkt erlaubt dabei eine große Freiheit bei der Gestaltung der gewünschten Synchronbewegung der Sitzfläche bezüglich der Auslenkung der Rückenlehne.In a further advantageous embodiment of the invention, the seat is guided in a spaced from the Aufpunkt further Aufpunkt by means of a support frame mounted on the support member such that in an upward pivotal movement at the Aufpunkt an overall tilt of the seat is effected towards the backrest. In such a construction, the increasing forward inclination of the seat back pressure of the seated person is absorbed by the appropriately oriented inclination of the seat. Slipping of the seated person is thus prevented. The guidance of the seat by means of the seat guide element in a further Aufpunkt allows a great deal of freedom in the design of the desired synchronous movement of the seat with respect to the deflection of the backrest.

Zweckmäßigerweise wirken der Sitzlenker und das Sitzführungselement derart zusammen, dass durch eine nach hinten gerichtete Kippbewegung der Rückenlehne der Aufpunkt angehoben und der weitere Aufpunkt nach hinten oben geschoben wird. Dadurch, dass der Aufpunkt in einer Drehbewegung angehoben und der weitere Aufpunkt durch die Drehbewegung geschoben wird, ist eine leichte Ausgestaltung der Anhebung der Sitzfläche mit einem gewünschten Neigungsverlauf möglich.Conveniently, the seat link and the seat guide element cooperate in such a way that raised by a rearward tilting movement of the backrest of the Aufpunkt and the other Aufpunkt is pushed backwards up. Characterized in that the Aufpunkt raised in a rotational movement and the other Aufpunkt is pushed by the rotational movement, a slight embodiment of the raising of the seat with a desired inclination curve is possible.

In vorteilhafter Weise ist das Sitzführungselement als eine Kulissenführung ausgebildet. Die Kulissenführung erlaubt neben der Führung entsprechend der vorgegebenen Kulissenform als weiteren Freiheitsgrad eine Drehbewegung. Hierdurch kann in einfacher Art und Weise die Bewegung der Sitzfläche innerhalb gewisser Grenzen beeinflusst und vorherbestimmt werden.Advantageously, the seat guide element is designed as a slotted guide. The slotted guide allows in addition to the leadership in accordance with the predetermined link shape as a further degree of freedom a rotational movement. As a result, the movement of the seat can be influenced and predetermined within certain limits in a simple manner.

Zweckmäßigerweise weist die Kulissenführung eine gekrümmte Führung auf. Durch die Krümmung ist die Progression der Anhebung des weiteren Aufpunkts der Sitzfläche einstellbar. Damit lässt sich in Zusammenwirkung mit der aufwärtigen Schwenkbewegung des vorderen Aufpunkts der Bewegungsverlauf der Sitzfläche als solcher vorbestimmen.Conveniently, the slide guide on a curved guide. Due to the curvature, the progression of the increase of the further point of the seat is adjustable. This can be in conjunction with the upward pivoting movement of the front point of the movement course of the seat as such predetermined.

In einer anderen zweckmäßigen Ausgestaltung weist die Kulissenführung eine lineare Führung auf. Eine solche Führung ist günstig realisierbar. Über das Zusammenspiel mit dem Bewegungsverlauf des vorderen Aufpunkts kann zudem auch mit einer linearen Führung eine Progression der Aufwärtsbewegung des weiteren Aufpunkts derart erzielt werden, dass sich die Sitzfläche bei Auslenkung der Rückenlehne neigt und zusätzlich insgesamt mit steigender Auslenkung der Rückenlehne um so stärker angehoben wird.In another expedient embodiment, the slotted guide on a linear guide. Such leadership is low feasible. By way of interaction with the course of movement of the front point, a progression of the upward movement of the further point can also be achieved with a linear guide in such a way that the seat surface inclines when the backrest is deflected and, in addition, the more the overall height increases with increasing deflection of the backrest.

Für eine von einer sitzenden Person unabhängig von der Auslenkung der Rückenlehne als konstant empfundene Gegenkraft ist es vorteilhaft, wenn die Verbindungsgerade zwischen dem dritten Drehlager und dem ersten Drehlager mit der Verbindungsgeraden zwischen dem dritten Drehlager und dem Drehlager, in welchem die Zugstange gelagert ist, annähernd einen rechten Winkel einschließt und die Verbindungsgerade zwischen dem Drehlager zur Lagerung der Zugstange und dem dritten Drehlager mit der Verbindungsgeraden zwischen dem Drehlager, in welchem die Zugstange gelagert ist, und dem Drehlager, in welchem der Lehnenträger gelagert ist, einen Winkel von mehr als 90°, insbesondere von mehr als 120°, einschließt. Diese Anordnung ist Platz sparend und erlaubt eine günstige Umsetzung der Kippbewegung der Rückenlehne in eine gewünschte Aufwärtsbewegung der Sitzfläche.For one of a seated person regardless of the deflection of the backrest perceived as constant counterforce, it is advantageous if the connecting line between the third pivot bearing and the first pivot bearing with the connecting line between the third pivot bearing and the pivot bearing in which the tie rod is mounted approximately includes a right angle and the connecting line between the pivot bearing for mounting the drawbar and the third pivot bearing with the connecting line between the pivot bearing in which the drawbar is mounted, and the pivot bearing in which the backrest support is mounted, an angle of more than 90 ° , in particular more than 120 °. This arrangement saves space and allows a favorable implementation of the tilting movement of the backrest in a desired upward movement of the seat.

In einer weiteren stabilen Variante ist der Synchronisationsmechanismus insgesamt jeweils spiegelsymmetrisch zu beiden Seiten der Sitzfläche angeordnet. Dabei ist es insbesondere zweckmäßig, die Gelenkelemente als flache Gelenkplatten auszubilden.In a further stable variant of the synchronization mechanism is arranged in total mirror-symmetrical to both sides of the seat. It is particularly expedient to form the joint elements as flat hinge plates.

Ausführungsbeispiele der Erfindung werden anhand einer Zeichnung näher erläutert. Dabei zeigen:

Fig. 1
in einer Seitenansicht schematisch einen Bürostuhl mit einer Gewichts- mechanik in Ruheposition, wobei die Sitzfläche über einen Sitzlenker auf einem Trägergestell gelagert ist und
Fig. 2
in einer Seitenansicht schematisch den Bürostuhl gemäß Fig. 1 in ausge- lenkter Position, und
Fig. 3
in einer Seitenansicht schematisch einen Bürostuhl mit einer Gewichts- mechanik in Ruheposition, wobei eine lineare Kulissenführung vorgese- hen ist.
Embodiments of the invention will be explained in more detail with reference to a drawing. Showing:
Fig. 1
in a side view schematically an office chair with a weight mechanism in the rest position, wherein the seat is mounted on a seat link on a support frame and
Fig. 2
in a side view schematically the office chair according to Fig. 1 in a distanced position, and
Fig. 3
in a side view schematically an office chair with a weight mechanism in the rest position, with a linear slotted guide is provided.

Fig. 1 zeigt in einer Seitenansicht schematisch einen Bürostuhl 1, der eine Sitzfläche 3 sowie eine Rückenlehne 5 aufweist. Der Stuhl 1 weist ferner eine zentrale Stuhlsäule 7 auf, die - nicht dargestellt - von einem Fußgestell, insbesondere einem Drehgestell mit Rollrädern, getragen wird. Auf der Stuhlsäule 7 ist ein zentrales Trägergestell 8 angeordnet, an welchem die Sitzfläche 3 und die Rückenlehne 5 über einen Sitzlenker 9 bzw. einen Lehnenträger 10 angelenkt sind. Fig. 1 shows in a side view schematically an office chair 1, which has a seat 3 and a backrest 5. The chair 1 also has a central chair column 7, which - not shown - by a pedestal, especially a bogie with wheels, is worn. On the chair column 7, a central support frame 8 is arranged, on which the seat surface 3 and the backrest 5 are articulated via a seat link 9 or a backrest support 10.

Zur Ausbildung eines Synchrorimechanismus ist der Lehnenträger 10 über das Drehlager 11 drehbar an dem Trägergestell 8 befestigt. Die Sitzfläche 3 ist über den als Gelenkelement 13 ausgebildeten Sitzlenker 9 ebenfalls drehbar in einem ersten Drehlager 17 an dem Trägergestell 8 befestigt. Das Gelenkelement 13 weist neben dem ersten Drehlager 17 ein zweites Drehlager 18 und ein drittes Drehlager 19 auf. In dem zweiten Drehlager 18 ist in einen Aufpunkt 15 die Sitzfläche 3 gelagert, so dass die Sitzfläche 3 insgesamt gegenüber dem Trägergestell 8 eine Schwenkbewegung ausführen kann.To form a Synchrorimechanismus the backrest support 10 is rotatably mounted on the pivot bearing 11 to the support frame 8. The seat 3 is also rotatably mounted in a first pivot bearing 17 on the support frame 8 via the seat link 9 designed as a joint element 13. The joint element 13 has, in addition to the first pivot bearing 17, a second pivot bearing 18 and a third pivot bearing 19. In the second pivot bearing 18, the seat surface 3 is mounted in a Aufpunkt 15, so that the seat surface 3 can perform a total pivoting movement relative to the support frame 8.

An dem dritten Drehlager 19 des Gelenkelements 9 greift eine Zugstange 22 ein, deren anderes Ende über das Drehlager 23 mit einem abgewinkelten Schwenkarm 25 des Lehnenträgers 10 verbunden ist. In einem weiteren Aufpunkt 27 ist die Sitzfläche 3 über eine Kulissenführung 30 am Trägergestell 8 angeschlossen.At the third pivot bearing 19 of the joint member 9 engages a tie rod 22, whose other end is connected via the pivot bearing 23 with an angled pivot arm 25 of the back support 10. In a further Aufpunkt 27, the seat 3 is connected via a slotted guide 30 on the support frame 8.

Die Funktionsweise des Bürostuhls 1 wird aus einem Vergleich der Fig. 1 und 2 ersichtlich. Während Fig. 1 - die erwähnt - den Bürostuhl 1 im Ruhezustand zeigt, ist in Fig. 2 der Bürostuhl 1 in ausgelenkter Form dargestellt.The operation of the office chair 1 is from a comparison of Fig. 1 and 2 seen. While Fig. 1 - which mentions - the office chair 1 shows at rest, is in Fig. 2 the office chair 1 shown in deflected form.

Wird ausgehend von der Ruheposition des Bürostuhls 1 gemäß Fig. 1 die Rückenlehne 5 nach hinten geneigt, so wird der Schwenkarm 25 aufgrund der Lagerung des Lehnenträgers 10 in dem Drehlager 11 nach rechts oben bewegt. Diese Bewegung wird über die Zugstange 22 auf das Gelenkelement 13 übertragen. Der Versatz der Zugstange 22 führt aufgrund der Lagerung des Gelenkelements 13 in dem ersten Drehlager 17 zu einer Aufrichtung des Gelenkelements 13. Dabei bewegt sich der Aufpunkt 15 der Sitzfläche 3 in einer aufwärtigen Schwenkbewegung. Die Sitzfläche 3 wird also insgesamt angehoben und gleichzeitig in der gezeigten Darstellung nach rechts bewegt. Der weitere Aufpunkt 27 der Sitzfläche 3 bewegt sich dabei entsprechend der gekrümmten Kulissenführung 30 ebenfalls in einer Art Schwenkbewegung nach rechts oben. Dabei ist die Krümmung der Kulissenführung so bemessen, dass sich mit fortlaufender Bewegung die Sitzfläche 3 insgesamt zur Rückenlehne 5 hin neigt.Is based on the rest position of the office chair 1 according to Fig. 1 the backrest 5 inclined backwards, so the pivot arm 25 is moved due to the storage of the backrest carrier 10 in the pivot bearing 11 to the top right. This movement will transmitted via the pull rod 22 to the joint member 13. The offset of the pull rod 22 leads due to the mounting of the joint member 13 in the first pivot bearing 17 to an erection of the joint member 13. In this case, the Aufpunkt 15 of the seat 3 moves in an upward pivotal movement. The seat 3 is thus raised overall and simultaneously moved to the right in the illustration shown. The other Aufpunkt 27 of the seat 3 moves in accordance with the curved slide guide 30 also in a kind of pivoting movement to the top right. In this case, the curvature of the slotted guide is dimensioned such that, with continuous movement, the seat surface 3 generally inclines towards the backrest 5.

Betrachtet man die von dem Gelenkelement 9 bzw. dem Aufpunkt 15, dem Schwenkarm 25 bzw. dem Drehlager 23 und dem weiteren Aufpunkt 27 ausgeführten Dreh- bzw. Schwenkbewegungen entsprechend einer fiktiven Stundeneinteilung von 12 Stunden, so bewegt sich, ausgehend von der Ruheposition des Bürostuhls 1 gemäß Fig. 1 der Aufpunkt 15 zunächst bei 9 Uhr beginnend in Richtung einer 11-Uhr-Position in Fig. 2. Dabei greift zu Beginn die Zugstange 22 bezüglich der Drehbewegung des Gelenkelements 13 im dritten Drehlager 19 in etwa tangential an. Der Winkel der Zugstange 22 zu dem durch das erste Drehlager 17 und das dritte Drehlager 19 verlaufenden Radius der Drehbewegung beträgt in etwa 90°. Gegenüber dieser Drehbewegung des Gelenkelements 13 bewegt sich der Schwenkarm 25 entsprechend der durchgeführten Neigung der Rückenlehne 5 um etwa eine Stunde. Dabei ist am Ende der Bewegung entsprechend der in Fig. 2 eingenommenen Position des Bürostuhls 1 die Zugstange 22 tangential zu der Drehbewegung des Schwenkarms 25 ausgerichtet.If one considers the rotational or pivoting movements carried out by the joint element 9 or the end point 15, the pivot arm 25 or the pivot bearing 23 and the further point of reference in accordance with a fictitious hourly division of 12 hours, starting from the rest position of the office chair 1 according to Fig. 1 the Aufpunkt 15 first at 9 o'clock beginning in the direction of an 11 o'clock position in Fig. 2 , At the beginning, the pull rod 22 engages approximately tangentially with respect to the rotational movement of the joint element 13 in the third pivot bearing 19. The angle of the pull rod 22 to the passing through the first pivot bearing 17 and the third pivot bearing 19 radius of rotation is approximately 90 °. Opposite this rotational movement of the joint member 13, the pivot arm 25 moves according to the performed tilt of the backrest 5 by about one hour. It is at the end of the movement according to the in Fig. 2 assumed position of the office chair 1, the pull rod 22 is aligned tangentially to the rotational movement of the pivot arm 25.

Mit anderen Werten führt ausgehend von der in Fig. 1 gezeigten Ruheposition des Bürostuhls 1 zu Beginn der Bewegung derselbe Auslenkwinkel der Rückenlehne 5 zu einem kleineren Versatz der Zugstange 22 als am Ende der Bewegung gemäß der ausgelenkten Position des Bürostuhls 1 in Fig. 2. Zusätzlich bewirkt derselbe Versatz der Zugstange 22 zu Beginn der Bewegung einen kleineren Drehwinkel des Gelenkelements 9 als am Ende der Bewegung gemäß der Position des Bürostuhls 1 in Fig. 2. Mit der gezeigten Ausgestaltung wird insgesamt bewirkt, dass eine auf dem Bürostuhl 5 sitzende Person unabhängig von der Neigungsposition der Rückenlehne 5 einen annähernd gleichen Gegendruck erfährt. Dabei ist eine Kompensation der Neigungsbewegung der Rückenlehne 5 derart möglich, dass die bei starker Neigung zusätzlich auf die Rückenlehne 5 wirkende Gewichtskraft der sitzenden Person berücksichtigt ist. Je stärker die Neigung der Rückenlehne 5 ist, umso mehr wird pro Winkelgrad der Neigung die Sitzfläche 3 angehoben. Der Gegendruck passt sich dabei automatisch über den Synchronisationsmechanismus dem Körpergewicht der sitzenden Person an.With other values, starting from the in Fig. 1 shown rest position of the office chair 1 at the beginning of the movement, the same deflection angle of the backrest 5 to a smaller displacement of the drawbar 22 than at the end of the movement according to the deflected position of the office chair 1 in Fig. 2 , In addition, the same offset of the pull rod 22 at the beginning of the movement causes a smaller angle of rotation of the hinge element 9 than at the end of the movement according to the position of the office chair 1 in FIG Fig. 2 , With the embodiment shown, the effect is that a person sitting on the office chair 5 experiences an approximately equal counterpressure independently of the inclination position of the backrest 5. Here is a compensation of the tilt movement the backrest 5 is possible such that the force acting on the backrest 5 in addition heavy weight of the seated person is taken into account. The stronger the inclination of the backrest 5, the more the seat surface 3 is raised per angular degree of inclination. The counterpressure automatically adapts to the body weight of the seated person via the synchronization mechanism.

Fig. 3 zeigt in einer Seitenansicht schematisch einen Bürostuhl 1', wobei der weitere Aufpunkt 27 der Sitzfläche 3 sich bei Auslenkung des Lehnenträgers 10 in einer linearen Kulissenführung 30' nach rechts bewegt. Dabei ist die lineare Kulissenführung 30' so ausgestaltet, dass sich mit forlaufender Bewegung der Rückenlehne die Sitzfläche 3 zur Rückenlehne 5 hin neigt und insgesamt zunehmend angehoben wird. Fig. 3 shows in a side view schematically an office chair 1 ', wherein the further Aufpunkt 27 of the seat surface 3 moves in deflection of the backrest support 10 in a linear slotted guide 30' to the right. In this case, the linear slotted guide 30 'is designed so that the seating surface 3 tends to the backrest 5 with progressive movement of the backrest and is increasingly raised overall.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1,1'1,1 '
Bürostuhloffice chair
33
Sitzflächeseat
55
Rückenlehnebackrest
77
Stuhlsäulechair column
88th
Trägergestellsupport frame
99
Sitzlenkerseat link
1010
Lehnenträgerbackrest support
1111
Drehlagerpivot bearing
1313
Gelenkelementjoint element
1515
Aufpunktreference point
1717
erstes Drehlagerfirst pivot bearing
1818
zweites Drehlagersecond pivot bearing
1919
drittes Drehlagerthird pivot
2222
Zugstangepull bar
2323
Drehlagerpivot bearing
2525
Schwenkarmswivel arm
2727
weiterer Aufpunktanother point of reference
30,30'30.30 '
Kulissenführunglink guide

Claims (11)

  1. Chair, in particular office chair (1, 1'), having a backrest (5) which is connected in an articulated manner to a support frame (8) by means of a rest support (10), and also having a seat surface (3) which can be moved in synchronism with said backrest and is connected to the support frame (8) in a pivotable manner by means of a seat link (9) at a contact point (15), with the rest support (10) and the seat link (9) each being rotatably fixed to the support frame (8), and with a tie rod (22) moveably connecting the seat link (9) to the rest support (10) in such a way that a tilting movement of the backrest (5), which tilting movement is directed backward, is converted into an upward pivoting movement of the seat surface (3) at the contact point (15).
  2. Chair according to Claim 1, with the rest support (10) being rotatably fixed to the support frame (8) by means of a rotary bearing (11) and having a rotary bearing (23) on which the tie rod (22) is rotatably mounted and which is arranged in front of the rotary bearing (11) in the direction of the seat link (9) and above the rotary bearing (11) in the direction of the seat surface (3).
  3. Chair according to Claim 1 or 2, with the rest support (10) having an angled pivot arm (25) on which the tie rod (22) is rotatably mounted.
  4. Chair according to one of the preceding claims, with the seat link (9) being rotatably mounted on the seat surface (3).
  5. Chair according to one of the preceding claims, with the seat link (9) being in the form of an articulation element (13), in particular an articulation plate, with a first (17), a second (18) and a third rotary bearing (19), with the seat surface (3) being connected to the support frame (8) by means of the first (17) and the second rotary bearing (18).
  6. Chair according to one of the preceding claims, with the seat surface (3) being guided at a further contact point (27), which is at a distance from the contact point (15), by means of a seat guide element which is mounted on the support frame (8) in such a way that the seat surface (3) is, overall, inclined towards the backrest (5) at the contact point in the event of an upward pivoting movement of the seat surface (3).
  7. Chair according to Claim 6, with the seat link (9) and the seat guide element interacting in such a way that the contact point (15) is raised by virtue of a backwardly directed tilting movement of the backrest (5) and the further contact point (27) is shifted backward and upward.
  8. Chair according to Claim 6 or 7, with the seat guide element being in the form of a slotted guide (30).
  9. Chair according to Claim 8, with the slotted guide (30) having a curved guide.
  10. Chair according to Claim 8, with the slotted guide (30) having a linear guide.
  11. Chair according to one of Claims 5 to 10, with the straight connecting line between the third rotary bearing (19) and the first rotary bearing (17) approximately forming a right angle with the straight connecting line between the third rotary bearing (19) and the rotary bearing (23) in which the tie rod (22) is mounted, and with the straight connecting line between the rotary bearing (23) for mounting the tie rod (22) and the third rotary bearing (19) forming an angle of more than 90°, in particular of more than 120° with the straight connecting line between the rotary bearing (23) and the rotary bearing (11) in which the rest support (10) is mounted.
EP06762680A 2005-07-27 2006-07-19 Chair, especially office chair Active EP1906792B1 (en)

Applications Claiming Priority (2)

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DE202005011725U DE202005011725U1 (en) 2005-07-27 2005-07-27 Chair, especially office chair
PCT/EP2006/007077 WO2007012418A1 (en) 2005-07-27 2006-07-19 Chair, especially office chair

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EP1906792A1 EP1906792A1 (en) 2008-04-09
EP1906792B1 true EP1906792B1 (en) 2010-02-24

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EP (1) EP1906792B1 (en)
AT (1) ATE458423T1 (en)
AU (1) AU2006274242A1 (en)
DE (2) DE202005011725U1 (en)
ES (1) ES2339151T3 (en)
WO (1) WO2007012418A1 (en)

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DE202015103592U1 (en) 2015-07-08 2016-10-11 Figueroa Büro für Gestaltung GmbH Chair with a synchronous mechanism for synchronous adjustment of the seat element when pivoting the backrest
DE102015111016A1 (en) 2015-07-08 2017-01-12 Figueroa Büro für Gestaltung GmbH Chair with a synchronous mechanism for synchronous adjustment of the seat element when pivoting the backrest
US11350750B2 (en) 2018-04-17 2022-06-07 L&P Property Management Company Tilt mechanism for a chair and chair

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US10194750B2 (en) 2015-04-13 2019-02-05 Steelcase Inc. Seating arrangement
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Publication number Priority date Publication date Assignee Title
DE202015103592U1 (en) 2015-07-08 2016-10-11 Figueroa Büro für Gestaltung GmbH Chair with a synchronous mechanism for synchronous adjustment of the seat element when pivoting the backrest
DE102015111016A1 (en) 2015-07-08 2017-01-12 Figueroa Büro für Gestaltung GmbH Chair with a synchronous mechanism for synchronous adjustment of the seat element when pivoting the backrest
DE102015111016B4 (en) 2015-07-08 2021-07-15 Figueroa Büro für Gestaltung GmbH Chair with a synchronous mechanism for synchronous adjustment of the chair carrier when the backrest is swiveled
US11350750B2 (en) 2018-04-17 2022-06-07 L&P Property Management Company Tilt mechanism for a chair and chair

Also Published As

Publication number Publication date
AU2006274242A1 (en) 2007-02-01
EP1906792A1 (en) 2008-04-09
DE202005011725U1 (en) 2006-12-07
ATE458423T1 (en) 2010-03-15
WO2007012418A1 (en) 2007-02-01
DE502006006259D1 (en) 2010-04-08
ES2339151T3 (en) 2010-05-17

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