EP1596691B1 - Chair, especially an office or work chair - Google Patents

Chair, especially an office or work chair Download PDF

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Publication number
EP1596691B1
EP1596691B1 EP04710835A EP04710835A EP1596691B1 EP 1596691 B1 EP1596691 B1 EP 1596691B1 EP 04710835 A EP04710835 A EP 04710835A EP 04710835 A EP04710835 A EP 04710835A EP 1596691 B1 EP1596691 B1 EP 1596691B1
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EP
European Patent Office
Prior art keywords
seat part
backrest
support frame
chair
pivot axis
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
Application number
EP04710835A
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German (de)
French (fr)
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EP1596691A1 (en
Inventor
Andras Dosza-Farkas
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OMP Srl
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Dozsa-Farkas Andras
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Publication of EP1596691A1 publication Critical patent/EP1596691A1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03283—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with fluid springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers

Definitions

  • the invention relates to a chair, in particular an office or work chair, and in an equivalent way with loungers, upholstered armchairs, upholstered furniture or the like.
  • DE 199 27 691 A1 discloses a chair, in particular an office chair, which has a seat support serving as a support frame. At this seat carrier is around a first. Rotational axis rotatably arranged a backrest part, which can be pivoted from a rest position about this first axis of rotation by a plurality of inclination positions. A seat part is tiltable about a second axis of rotation synchronous to the backrest part and longitudinally displaceable and tiltable about a third axis of rotation with respect to the support frame under positive guidance. Furthermore, in this field of application in chairs, such as office chairs or the like, there are so-called return devices which bring about the provision of the backrest part and / or the seat part in their respective rest positions.
  • the invention aims to provide a chair, in particular an office or work chair or the like, in which the inclination range of the backrest part can be extended to at least up to 45 ° in a structurally simple manner, and such a chair in all positions of the backrest part and / or the seat part has improved stability, as well as the occupants sitting on it no sense of instability or tipping sensation.
  • a chair in particular office or work chair is provided, which is rotatable with respect to a support frame about a first axis of rotation, tilted from its rest position in a plurality of tilt positions backrest part, a rotatably connected to the backrest part about a second axis of rotation, synchronous to the backrest part has longitudinally displaceable, and about a third axis of rotation with respect to the support frame positively guided tiltable seat part, and a return means for returning the backrest part and / or the seat part in their respective rest positions or starting positions.
  • This chair is characterized in that the first axis of rotation on the support frame in the rest position and in all inclination positions of the backrest part and / or the seat part always stationary with a predetermined, constant distance, preferably in a range of 50 to 200 mm, is arranged fußgestellmittig above the seat part, and that a movable about the first stationary axis of rotation pivot lever is at least connected to the backrest portion at its lower portion.
  • the axis of rotation for the tilting movement of the backrest part is always stationary and arranged at a predetermined distance from the surface of the seat part, in such a way that this first axis of rotation is fußgestellmittig.
  • the chair can be spent in a person sitting on it very relaxing inclination position with respect to the backrest part, and by redesigngestellmittige stationary position of the first axis of rotation occur no tilting moments in the tilting movement of the backrest portion of the chair, which take the person sitting on the chair could convey an uncomfortable and uncertain feeling.
  • the comfort can be significantly improved, and in particular can be a larger longitudinal displacement track for the seat without any loss of stability realize.
  • the design is such that the second axis of rotation for rotatable synchronous connection of the backrest part and seat part is equal to the seat part.
  • a synchronous driving under execution of a rotational movement about the second axis of rotation in the tilting movement of Backrest part and the longitudinal displacement of the seat part reached.
  • spaced apart on the support frame also fixedly provided axis of rotation is then effected by means of a positive guide a correspondingly suitable tilting movement combined with the longitudinal displacement movement of the seat part.
  • the seat part may, for example, be tilted slightly upward in the longitudinal displacement in synchrony with the inclination movement of the backrest part in order to effectively avoid constriction in the knee or lower leg area when the inclination position is taken by a person sitting on the chair.
  • the center of gravity of a person sitting on the chair regardless of the inclination movement of the backrest part essentially always fußgestellmittig thanks to the stationary, fußgestellmittigen arrangement of the first axis of rotation.
  • the person sitting on the chair is given a comfortable feeling when performing a tilting movement of the backrest part.
  • At least one connecting member is attached to the backrest part, which carries the seat part in the execution of the tilting movement of the backrest part in the longitudinal direction while performing a rotational movement about the second axis of rotation relative to the support frame.
  • the synchronous entrainment of the seat part is realized in the tilting movement of the backrest part in a structurally simple manner, and the seat part can thus synchronously with the tilting movement of the backrest part by a forced driving under a large degree of freedom in the interpretation of the movements of the seat part in the longitudinal direction and / or tilt direction to be moved.
  • the third axis of rotation for executing a tilting movement of the seat part is fixedly arranged on the support frame, and operates via a sliding guide or forced operation with the underside of the seat part together.
  • the risk of injury can be effectively avoided, and the third axis of rotation and the associated slide can be arranged in a suitable manner to the support frame of the chair.
  • the design of the chair according to the invention is such that both sides of the backrest part in each case a connecting member is mounted, and / or on both sides of the seat part per a sliding guide for cooperation with the third axis of rotation is provided on the support frame.
  • the return device between the support frame and the seat part is arranged in particular centrally below the seat part, thereby obtaining a space-saving arrangement of the return device.
  • the return device is preferably formed by a spring device.
  • other known repatriation devices can be used in this field.
  • the support frame is formed in particular by a substantially U-shaped bent bracket, the horizontal leg extends below the seat part, and protrude the leg ends on the seat part on which the first axis of rotation is mounted for the tilting movement of the backrest part.
  • the support frame engages under the seat part and similar to bearing supports, the lateral leg ends in the vertical direction over the seat part at a predetermined height over to arrange the first axis of rotation at the desired, predetermined spaced stationary position to the seat part above it.
  • the horizontal leg and that is centrally connected to a pedestal which in the form of a Monethyroxine-derived Schwingergestells or the like, can be designed.
  • the horizontal leg is used here for sectiongestellmittigen reliable arrangement of the support frame to avoid in a structurally simple way tilting moments in such a chair with tiltable backrest part.
  • the horizontal leg of the support frame is provided with a substantially perpendicular thereto extending support arm for the third cooperating with the seat part for performing a tilting rotation axis.
  • the third axis of rotation can be arranged fixed on the support frame and therefore also fixed to the first axis of rotation at a suitable location spaced from the central axis of the support frame and the pedestal in cantilevered manner.
  • the length of the support arm for the third rotation axis may be suitably selected depending on the length of the seat part and its longitudinal movement range.
  • the seat part is thus a reliable and stable support of the seat part in all movement positions of the seat part.
  • the third axis of rotation for the tilting movement of the seat part is arranged at the free end of the support arm, and extends parallel to the seat part. This gives a center of gravity support on the underside of the seat part with a stable support.
  • the return means is connected on the one hand to the free end of the support arm for the third axis of rotation and on the other hand to the seat part at a suitable location, for example in the vicinity of the backrest portion.
  • the feedback device can transmit the feedback loads on the seat part and / or the backrest part in a largely lossless manner.
  • the or the connecting members on the backrest part and seat part with the pivot lever for the backrest part of a unit are designed in one piece, and the connecting member or the connecting members of backrest part and seat part are preferably with connected to the pivot lever at the backrest Operaem end.
  • the pivot lever is formed bent in an L-shape, and its free end cooperates with the first, fixed axis of rotation of the support frame.
  • a chair in particular office or work chair specified in which the backrest part tiltable and the seat part are longitudinally displaceable and tiltable, and the person taking it sufficient stability even in the execution of the corresponding movements of backrest part and seat part taught.
  • the invention also in other seating, such as loungers, armchairs, upholstery or the like, realize and apply.
  • the first axis of rotation for carrying out a tilting movement of the backrest is stationary immovably arranged at a predetermined distance above the seat part, and this axis of rotation is arranged in extension of the vertical center axis of the chair structure.
  • a foot frame 2 for example in the form of Gottfußgestells, centered on a columnar part 3, which may include, for example, a gas spring or the like for height adjustment of the chair fußgestellmittig about a central center axis 4 rotatable with a support frame 5 connected.
  • the support frame 5 is of a substantially U-shaped bent bracket 6 is formed, which has a horizontal leg 7 and at the ends of the horizontal leg 7 upstanding leg ends 8.
  • a support arm 9 is mounted, which extends approximately perpendicular thereto, and at its cantilevered free end 10 fixedly carries a third axis of rotation 11.
  • a return device 13 can be seen, which is designed, for example, in the form of a spring element, and whose one end is fixed to the cantilevered free end 10 of the support arm 9 and the other end (see Figure 2) in the horizontal direction spaced therefrom firmly connected to a seat part 14.
  • the office chair 1 comprises a total of 15 designated backrest part, on which in the example shown on both sides firmly connected preferably a L-shaped trained pivot lever 16 is mounted.
  • a connecting member 17 is further attached, which is preferably formed integrally with the L-shaped pivot lever 16 and serves for connection to the seat part 14.
  • each connecting member 17 is provided, of course, only a central, centrally arranged connecting member 17 may be provided for cooperation with the seat part 14 in accordance with appropriate manner.
  • the seat part 14 has on both sides a sliding guide 18 near the end facing away from the backrest portion 15 end of the seat part 14.
  • two sliding guides 18 are shown in the figure, of course, only as a central arrangement a sliding guide on the seat part 14 may be provided.
  • the seat part 14 has a suitable fastening means 19 for an end of the return device 13 at a suitable location.
  • the support frame 5 with the upstanding leg ends 8 in connection with the L-shaped pivot lever 16 fixed to the first axis of rotation 12th forms, by which the backrest part 15 can perform a tilting movement.
  • This first axis of rotation 12 is arranged at a predetermined distance of preferably 50 to 200 mm above the upper edge of the seat part 14 centered to the pedestal 2.
  • the backrest part 15 is movable via the connecting members 17 about a second axis of rotation 20 which is mounted on the seat part 14.
  • the office chair 1 is shown in a position with partially inclined backrest portion 15.
  • the first axis of rotation 12 is and remains stationary on the support frame 5, and about this first axis of rotation 12, the backrest portion 15 performs a tilting movement.
  • the connecting members 17 in cooperation with the second axis of rotation 20 synchronously forced the seat portion 14 is taken in this tilting movement of the backrest portion 15, and it performs a longitudinal displacement movement and a tilting movement by cooperation of the third axis of rotation 11 and slide 18 on the seat part 14.
  • the inclination movement of the seat part 14 about the third axis of rotation 11 can be specified in a suitable manner.
  • FIG. 4 shows, in a skeletal perspective overall view, the office chair 1 in its greatest inclination position, for example 45 ° or more, starting from the rest position shown in FIG.
  • the first axis of rotation 12 is fixedly arranged on the support frame in this largest inclination position at a constant predetermined distance from the seat part 14, and also provided fußgestellmittig so that the center of gravity of a person sitting on the chair always largely centrally over the support frame 5 in all inclination positions of Backrest part 14 remains.
  • the seat portion 14 is moved in relation to the inclination movement of the backrest portion 15 even more longitudinally with respect to Figure 3, and the connecting member 17 occupies a position approximately horizontal or in the same plane as the seat portion 14 , at the same time, however, the seat part 14 also takes its greatest possible, preferably upward inclination position of the seat part 14 by the interaction of the third axis of rotation 11 and slideways 18 on the seat part 14 a.
  • deviating inclination movements of the seat part 14 about the third rotation axis 11 can also be carried out, which depends on the corresponding design of the sliding guide or the sliding guides 18, which are provided on the seat part 14.
  • the spring element of the return means 13 assumes a maximum tensioned position, and the two ends of the return means 13 have the smallest distance from each other, in contrast to that in the rest position of the office chair 1 in Also in this maximum inclination position of the backrest portion 15 of the office chair 1 of Figure 4, the center of gravity of sitting on this office chair 1 person remains substantially centered above the pedestal 2 in order to achieve the desired stability and safety, and the pivotal mounting of the backrest portion 15 about the first stationary axis of rotation axis 12 remains at the desired predetermined distance above the upper edge of the seat portion 14, so that this maximum inclination position of the backrest portion 15 gives sufficient reliability and stability and stability to the entire office chair 1.
  • the person sitting on the office chair 1 of the present invention takes in any inclination position of the backrest portion 15 also in each longitudinal displacement position and inclination position of the seat portion 14 a balance stable position, so that even in the relaxation position shown in Figure 4, the person does not get an unpleasant feeling.

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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)
  • Plural Heterocyclic Compounds (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Abstract

The office chair has a back rest (15) which reclines about an axis (12) at the ends of L-shaped levers (16) mounted on its base. The seat (14) slides forward in synchronization with the back rest. The axis is always 50 -200mm above the seat for all positions of the back rest.

Description

Die Erfindung befaßt sich mit einem Stuhl, insbesondere einem Büro- oder Arbeitsstuhl, sowie in äquivalenter Weise mit Relaxliegen, Polstersesseln, Polstermöbeln oder dergleichen.The invention relates to a chair, in particular an office or work chair, and in an equivalent way with loungers, upholstered armchairs, upholstered furniture or the like.

Aus DE 199 27 691 A1 ist ein Stuhl, insbesondere ein Bürostuhl, bekannt, welcher einen als ein Traggestell dienenden Sitzträger hat. An diesem Sitzträger ist um eine erste. Drehachse drehbar angeordnet ein Rückenlehnenteil, welches aus einer Ruheposition um diese erste Drehachse um mehrere Neigungspositionen verschwenkt werden kann. Ein Sitzteil ist um eine zweite Drehachse synchron zum Rückenlehnenteil neigbar und längs verschieblich sowie um eine dritte Drehachse bezüglich des Traggestells unter Zwangsführung neigbar. Ferner gibt es auf diesem Anwendungsgebiet bei Stühlen, wie Bürostühlen oder dergleichen, sogenannte Rückführungseinrichtungen, welche die Rückstellung des Rückenlehnenteils und/oder des Sitzteils in ihre jeweilige Ruhepositionen bewirken.DE 199 27 691 A1 discloses a chair, in particular an office chair, which has a seat support serving as a support frame. At this seat carrier is around a first. Rotational axis rotatably arranged a backrest part, which can be pivoted from a rest position about this first axis of rotation by a plurality of inclination positions. A seat part is tiltable about a second axis of rotation synchronous to the backrest part and longitudinally displaceable and tiltable about a third axis of rotation with respect to the support frame under positive guidance. Furthermore, in this field of application in chairs, such as office chairs or the like, there are so-called return devices which bring about the provision of the backrest part and / or the seat part in their respective rest positions.

Bei allen bisher bekannten Konstruktionen wird zwar versucht, auch bei einer weitreichenden Neigungsbewegung des Rückenlehnenteils mit einer Neigung von beispielsweise bis zu 40° - bezogen auf die Ausgangsposition oder Ruheposition des Rückenlehnenteils - unter Vermeidung der nach hinten gerichteten Kippbewegung des Stuhls solche Neigungsbewegungen für eine auf dem Stuhl sitzende Person zuzulassen, ohne daß diese Person das Gefühl eines baldigen Umkippens oder ein instabiles und unangenehmes Gefühl vermittelt bekommt. Bei dem Stuhl nach der DE 199 27 791 A1 wird die Auslegung derart getroffen, daß die erste Drehachse in der Ruheposition des Rückenlehnenteils in etwa auf gleicher Höhe oder höher positioniert ist, wie bzw. als die zweite Drehachse. Ferner soll die erste Drehachse höher als die Unterkante des Sitzteils liegen. Wie sich jedoch aus dieser Druckschrift zum Stand der Technik ersehen läßt, bewegt sich bei diesem aus DE 199 27 691 A1 bekannten Stuhl die erste Drehachse im Zuge der Neigungsbewegung des Rückenlehnenteils bezüglich des Traggestells bzw. des Sitzträgers über das Sitzteil nach oben. Bei diesem bekannten Stuhl ist die Neigungsbewegung des Rückenlehnenteils ausgehend von der Ausgangsposition zur Ruheposition auf einen Neigungswinkelwert von höchstens 40° beschränkt.In all previously known constructions is indeed trying, even with a far-reaching inclination movement of the backrest portion with an inclination of up to 40 ° - based on the starting position or rest position of the backrest part - while avoiding the rearward tilting movement of the chair such inclination movements for a on the Allowing a chair to seat a seated person, without that person feeling a sudden tip over or an unstable and uncomfortable Feeling gets conveyed. In the chair according to DE 199 27 791 A1, the design is made such that the first axis of rotation is positioned in the rest position of the backrest part at about the same height or higher, as or as the second axis of rotation. Furthermore, the first axis of rotation should be higher than the lower edge of the seat part. However, as can be seen from this document to the prior art moves in this known from DE 199 27 691 A1 chair, the first axis of rotation in the course of inclination movement of the backrest part with respect to the support frame or the seat support on the seat part upwards. In this known chair, the inclining movement of the backrest part from the initial position to the rest position is restricted to a tilt angle value of at most 40 °.

Demgegenüber zielt die Erfindung darauf ab, einen Stuhl, insbesondere einen Büro- oder Arbeitsstuhl oder dergleichen bereitzustellen, bei welchem der Neigungsbereich des Rückenlehnenteils auf mindestens bis zu 45° auf konstruktiv einfache Weise erweiterbar ist, und ein solcher Stuhl in allen Positionen des Rückenlehnenteils und/oder des Sitzteils eine verbesserte Stabilität besitzt, sowie den darauf Platz nehmenden Personen kein Instabilitätsgefühl oder Umkippgefühl vermittelt.In contrast, the invention aims to provide a chair, in particular an office or work chair or the like, in which the inclination range of the backrest part can be extended to at least up to 45 ° in a structurally simple manner, and such a chair in all positions of the backrest part and / or the seat part has improved stability, as well as the occupants sitting on it no sense of instability or tipping sensation.

Nach der Erfindung wird hierzu ein Stuhl, insbesondere Büro- oder Arbeitsstuhl bereitgestellt, welcher ein bezüglich eines Traggestells um eine erste Drehachse drehbar angeordnetes, aus seiner Ruheposition in mehrere Neigungspositionen neigbares Rückenlehnenteil, ein mit dem Rückenlehnenteil um eine zweite Drehachse drehbar verbundenes, synchron zum Rückenlehnenteil längs verschiebliches, und um eine dritte Drehachse bezüglich des Traggestells zwangsgeführtes neigbares Sitzteil, und eine Rückführungseinrichtung zur Rückstellung des Rückenlehnenteils und/oder des Sitzteils in ihre jeweilige Ruhepositionen bzw. Ausgangspositionen hat. Dieser Stuhl zeichnet sich dadurch aus, daß die erste Drehachse am Traggestell in der Ruheposition und in allen Neigungspositionen des Rückenlehnenteils und/oder des Sitzteils immer ortsfest mit einem vorbestimmten, konstanten Abstand, vorzugsweise in einem Bereich von 50 bis 200 mm, oberhalb des Sitzteils fußgestellmittig angeordnet ist, und daß ein um die erste ortsfeste Drehachse beweglicher Schwenkhebel wenigstens mit dem Rückenlehnenteil an seinem unteren Bereich verbunden ist.According to the invention for this purpose a chair, in particular office or work chair is provided, which is rotatable with respect to a support frame about a first axis of rotation, tilted from its rest position in a plurality of tilt positions backrest part, a rotatably connected to the backrest part about a second axis of rotation, synchronous to the backrest part has longitudinally displaceable, and about a third axis of rotation with respect to the support frame positively guided tiltable seat part, and a return means for returning the backrest part and / or the seat part in their respective rest positions or starting positions. This chair is characterized in that the first axis of rotation on the support frame in the rest position and in all inclination positions of the backrest part and / or the seat part always stationary with a predetermined, constant distance, preferably in a range of 50 to 200 mm, is arranged fußgestellmittig above the seat part, and that a movable about the first stationary axis of rotation pivot lever is at least connected to the backrest portion at its lower portion.

Bei der erfindungsgemäßen Konstruktion des Stuhls ist die Drehachse für die Neigungsbewegung des Rückenlehnenteils immer ortsfest und in einem vorbestimmten Abstand von der Oberfläche des Sitzteils angeordnet, und zwar derart, daß diese erste Drehachse fußgestellmittig liegt. Bei dem erfindungsgemäßen Stuhl werden daher bei der Neigungsbewegung des Rückenlehnenteils gegebenenfalls synchron mit einer Längsverschiebung und/oder Neigungsbewegung des Sitzteils keine Kippmomente erzeugt, da die erste Drehachse ortsfest vorgesehen ist und in Achsrichtung des Stuhls unverändert in der Ruheposition und in allen Neigungspositionen ortsfest ist und bleibt. Ferner wird durch diese Auslegung nach der Erfindung auch erreicht, daß sich der Neigungswinkel für das Rückenlehnenteil wesentlich bis zu 45° und weiter erweitern läßt, ohne daß sich Instabilitätsverhältnisse ergeben. Hierdurch kann der Stuhl in eine für die darauf Platz nehmende Person sehr entspannende Neigungslage bezüglich des Rückenlehnenteils verbracht werden, und durch die fußgestellmittige ortsfeste Lage der ersten Drehachse treten keine Kippmomente bei der Neigungsbewegung des Rückenlehnenteils des Stuhls auf, welche der auf dem Stuhl Platz nehmenden Person ein unangenehmes und unsicheres Gefühl vermitteln könnten. Mit der erfindungsgemäßen Auslegung des Stuhls läßt sich also der Komfort wesentlich verbessern, und insbesondere läßt sich auch eine größere Längsverschiebungsstrecke für das Sitzteil ohne jegliche Stabilitätseinbußen verwirklichen.In the construction of the chair according to the invention, the axis of rotation for the tilting movement of the backrest part is always stationary and arranged at a predetermined distance from the surface of the seat part, in such a way that this first axis of rotation is fußgestellmittig. In the chair according to the invention therefore no tilting moments are generated during the tilting movement of the backrest part, possibly synchronously with a longitudinal displacement and / or tilting movement of the seat part, since the first axis of rotation is provided stationary and unchanged in the axial direction of the chair in the rest position and in all tilt positions and remains , Furthermore, it is also achieved by this design according to the invention that the angle of inclination for the backrest part can be significantly extended up to 45 ° and further, without resulting Instabilitätsverhältnisse. In this way, the chair can be spent in a person sitting on it very relaxing inclination position with respect to the backrest part, and by Fußgestellmittige stationary position of the first axis of rotation occur no tilting moments in the tilting movement of the backrest portion of the chair, which take the person sitting on the chair could convey an uncomfortable and uncertain feeling. With the design of the chair according to the invention so the comfort can be significantly improved, and in particular can be a larger longitudinal displacement track for the seat without any loss of stability realize.

Vorzugsweise ist bei der Erfindung die Auslegung derart getroffen, daß die zweite Drehachse zur drehbaren synchronen Verbindung von Rückenlehnenteil und Sitzteil in Höhe des Sitzteils liegt. Hierdurch wird auf konstruktiv einfache Weise eine synchrone Mitnahme unter Ausführung einer Drehbewegung um die zweite Drehachse bei der Neigungsbewegung des Rückenlehnenteils und die Längsverschiebung des Sitzteils erreicht. Um die dritte, beabstandet hierzu am Traggestell ebenfalls ortsfest vorgesehene Drehachse wird dann mittels einer Zwangsführung eine entsprechend geeignete Neigungsbewegung kombiniert mit der Längsverschiebungsbewegung des Sitzteils bewirkt. Insbesondere kann mittels dieser dritten Drehachse das Sitzteil bei der Längsverschiebung synchron zu der Neigungsbewegung des Rückenlehnenteils beispielsweise geringfügig nach oben geneigt werden, um eine Einschnüren im Knie- bzw. Unterschenkelbereich bei der Einnahme der Neigungsposition bei einer auf dem Stuhl sitzenden Person wirksam zu vermeiden. Bei der erfindungsgemäßen Konstruktion des Stuhls ist und bleibt der Körperschwerpunkt einer auf dem Stuhl sitzenden Person unabhängig von der Neigungsbewegung des Rückenlehnenteils im wesentlichen immer fußgestellmittig dank der ortsfesten, fußgestellmittigen Anordnung der ersten Drehachse. Auch hierdurch wird der auf dem Stuhl sitzenden Person ein behagliches Gefühl bei der Ausführung einer Neigungsbewegung des Rückenlehnenteils vermittelt.Preferably, in the invention, the design is such that the second axis of rotation for rotatable synchronous connection of the backrest part and seat part is equal to the seat part. As a result, in a structurally simple manner a synchronous driving under execution of a rotational movement about the second axis of rotation in the tilting movement of Backrest part and the longitudinal displacement of the seat part reached. To the third, spaced apart on the support frame also fixedly provided axis of rotation is then effected by means of a positive guide a correspondingly suitable tilting movement combined with the longitudinal displacement movement of the seat part. In particular, by means of this third axis of rotation, the seat part may, for example, be tilted slightly upward in the longitudinal displacement in synchrony with the inclination movement of the backrest part in order to effectively avoid constriction in the knee or lower leg area when the inclination position is taken by a person sitting on the chair. In the construction of the chair according to the invention is the center of gravity of a person sitting on the chair, regardless of the inclination movement of the backrest part essentially always fußgestellmittig thanks to the stationary, fußgestellmittigen arrangement of the first axis of rotation. Again, the person sitting on the chair is given a comfortable feeling when performing a tilting movement of the backrest part.

Vorzugsweise ist an dem Rückenlehnenteil wenigstens ein Verbindungsglied angebracht, welches das Sitzteil bei der Ausführung der Neigungsbewegung des Rückenlehnenteils in Längsrichtung unter Ausführung einer Drehbewegung um die zweite Drehachse relativ zum Traggestell mitnimmt. Über dieses wenigstens eine Verbindungsglied wird die synchrone Mitführung des Sitzteils bei der Neigungsbewegung des Rückenlehnenteils auf konstruktiv einfache Weise verwirklicht, und das Sitzteil kann somit synchron mit der Neigungsbewegung des Rückenlehnenteils durch eine Zwangsmitnahme unter einem großen Freiheitsgrad hinsichtlich der Auslegung der Bewegungen des Sitzteils in Längsrichtung und/oder Neigungsrichtung bewegt werden.Preferably, at least one connecting member is attached to the backrest part, which carries the seat part in the execution of the tilting movement of the backrest part in the longitudinal direction while performing a rotational movement about the second axis of rotation relative to the support frame. About this at least one connecting member, the synchronous entrainment of the seat part is realized in the tilting movement of the backrest part in a structurally simple manner, and the seat part can thus synchronously with the tilting movement of the backrest part by a forced driving under a large degree of freedom in the interpretation of the movements of the seat part in the longitudinal direction and / or tilt direction to be moved.

Vorzugsweise ist die dritte Drehachse zur Ausführung einer Neigungsbewegung des Sitzteils ortsfest am Traggestell angeordnet, und arbeitet über eine Gleitführung oder Zwangsführung mit der Unterseite des Sitzteils zusammen. Hierdurch lassen sich Verletzungsgefahren wirksam vermeiden, und die dritte Drehachse sowie die zugeordnete Gleitführung lassen sich in geeigneter Weise an dem Traggestell des Stuhls anordnen.Preferably, the third axis of rotation for executing a tilting movement of the seat part is fixedly arranged on the support frame, and operates via a sliding guide or forced operation with the underside of the seat part together. In this way, the risk of injury can be effectively avoided, and the third axis of rotation and the associated slide can be arranged in a suitable manner to the support frame of the chair.

Vorzugsweise ist die Auslegung bei dem erfindungsgemäßen Stuhl derart getroffen, daß beidseitig am Rückenlehnenteil jeweils ein Verbindungsglied angebracht ist, und/oder beidseitig am Sitzteil je eine Gleitführung zum Zusammenarbeiten mit der dritten Drehachse am Traggestell vorgesehen ist. Hierdurch erhält man eine symmetrische Anordnung von Verbindungsgliedern und Gleitführungen für die zwangsweise geführte Bewegung des Sitzteils, so daß das Sitzteil bei seiner Zwangsführung in Verbindung mit der Neigungsbewegung des Rückenlehnenteils immer gleichmäßig und kippsicher unterstützt ist.Preferably, the design of the chair according to the invention is such that both sides of the backrest part in each case a connecting member is mounted, and / or on both sides of the seat part per a sliding guide for cooperation with the third axis of rotation is provided on the support frame. This gives a symmetrical arrangement of links and slideways for the forced guided movement of the seat part, so that the seat part is always supported evenly and tip over in its forced operation in conjunction with the tilting movement of the backrest part.

Vorzugsweise ist die Rückführungseinrichtung zwischen dem Traggestell und dem Sitzteil insbesondere zentral unterhalb des Sitzteils angeordnet, wodurch man eine platzsparende Anordnung der Rückführungseinrichtung erhält. Die Rückführungseinrichtung wird vorzugsweise von einer Federeinrichtung gebildet. Natürlich sind im Bedarfsfall auch andere an sich bekannte Rückführungseinrichtungen auf diesem Gebiet einsetzbar.Preferably, the return device between the support frame and the seat part is arranged in particular centrally below the seat part, thereby obtaining a space-saving arrangement of the return device. The return device is preferably formed by a spring device. Of course, if necessary, other known repatriation devices can be used in this field.

Bei dem erfindungsgemäßen Stuhl wird das Traggestell insbesondere von einem im wesentlichen U-förmig gebogenen Bügel gebildet, dessen horizontaler Schenkel unterhalb des Sitzteils verläuft, und dessen Schenkelenden über das Sitzteil überstehen, an denen die erste Drehachse für die Neigungsbewegung des Rückenlehnenteils gelagert ist. Bei dieser Auslegung untergreift das Traggestell das Sitzteil und ähnlich wie Lagerstützen stehen die seitlichen Schenkelenden in vertikaler Richtung über das Sitzteil in einer vorbestimmten Höhe über, um die erste Drehachse an der gewünschten, vorbestimmten beabstandeten ortsfesten Lage zu dem Sitzteil oberhalb desselben anzuordnen. Durch diese Auslegung kann dem Traggestell auch eine ausreichende Eigenstabilität bei möglichst geringen Materialquerschnitten verliehen werden. Vorzugsweise ist der horizontale Schenkel und zwar mittig mit einem Fußgestell verbunden, welches in Form eines Zentralfußgestells, eines Schwingergestells oder dergleichen, ausgelegt sein kann. Der horizontale Schenkel dient hierbei zur fußgestellmittigen zuverlässigen Anordnung des Traggestells, um auf konstruktiv einfache Weise Kippmomente bei einem solchen Stuhl mit neigbarem Rückenlehnenteil zu vermeiden.In the chair according to the invention, the support frame is formed in particular by a substantially U-shaped bent bracket, the horizontal leg extends below the seat part, and protrude the leg ends on the seat part on which the first axis of rotation is mounted for the tilting movement of the backrest part. In this design, the support frame engages under the seat part and similar to bearing supports, the lateral leg ends in the vertical direction over the seat part at a predetermined height over to arrange the first axis of rotation at the desired, predetermined spaced stationary position to the seat part above it. By this design, the support frame and a sufficient intrinsic stability with the smallest possible material cross-sections be lent. Preferably, the horizontal leg and that is centrally connected to a pedestal, which in the form of a Zentralfußgestells, a Schwingergestells or the like, can be designed. The horizontal leg is used here for Fußgestellmittigen reliable arrangement of the support frame to avoid in a structurally simple way tilting moments in such a chair with tiltable backrest part.

Vorzugsweise ist bei dem erfindungsgemäßen Stuhl der horizontale Schenkel des Traggestells mit einem im wesentlichen senkrecht hierzu verlaufenden Tragarm für die dritte mit dem Sitzteil zur Ausführung einer Neigungsbewegung zusammenarbeitenden Drehachse versehen. Durch diesen Tragarm kann somit die dritte Drehachse ortsfest am Traggestell und daher auch ortsfest der ersten Drehachse zugeordnet an einer geeigneten Stelle beabstandet von der Mittelachse des Traggestells und des Fußgestells in auskragender Weise angeordnet werden. Die Länge des Tragarms für die dritte Drehachse kann in Abhängigkeit von der Länge des Sitzteils und dessen Längsbewegungsbereich in geeigneter Weise gewählt werden. In Verbindung mit der beidseitig symmetrisch zur Längsmittelachse angeordneten Zwangsgleitführung des Sitzteils erfolgt somit eine zuverlässige und stabile Abstützung des Sitzteils in allen Bewegungspositionen des Sitzteils. Vorzugsweise ist die dritte Drehachse für die Neigungsbewegung des Sitzteils am freien Ende des Tragarms angeordnet, und erstreckt sich parallel zum Sitzteil. Hierdurch erhält man eine Schwerpunktabstützung an der Unterseite des Sitzteils mit einer stabilen Auflage.Preferably, in the chair according to the invention the horizontal leg of the support frame is provided with a substantially perpendicular thereto extending support arm for the third cooperating with the seat part for performing a tilting rotation axis. By this support arm thus the third axis of rotation can be arranged fixed on the support frame and therefore also fixed to the first axis of rotation at a suitable location spaced from the central axis of the support frame and the pedestal in cantilevered manner. The length of the support arm for the third rotation axis may be suitably selected depending on the length of the seat part and its longitudinal movement range. In conjunction with the both sides symmetrically arranged to the longitudinal central axis Zwangsgleitführung the seat part is thus a reliable and stable support of the seat part in all movement positions of the seat part. Preferably, the third axis of rotation for the tilting movement of the seat part is arranged at the free end of the support arm, and extends parallel to the seat part. This gives a center of gravity support on the underside of the seat part with a stable support.

Vorzugsweise ist die Rückführungseinrichtung einerseits mit dem freien Ende des Tragarms für die dritte Drehachse und andererseits mit dem Sitzteil an einer geeigneten Stelle, beispielsweise in der Nähe des Rückenlehnenteils, verbunden. Durch diese Auslegung kann die Rückführungseinrichtung auf weitgehend verlustfreie Weise die Rückführungsbelastungen auf das Sitzteil und/oder das Rückenlehnenteil übertragen.Preferably, the return means is connected on the one hand to the free end of the support arm for the third axis of rotation and on the other hand to the seat part at a suitable location, for example in the vicinity of the backrest portion. By this design, the feedback device can transmit the feedback loads on the seat part and / or the backrest part in a largely lossless manner.

Um die einzelnen Bauelemente des erfindungsgemäßen Stuhls so gering wie möglich zu halten, bildet das oder die Verbindungsglieder am Rückenlehnenteil und Sitzteil mit dem Schwenkhebel für das Rückenlehnenteil eine Baueinheit, oder sind einteilig ausgelegt, und das Verbindungsglied oder die Verbindungsglieder von Rückenlehnenteil und Sitzteil sind vorzugsweise mit dem Schwenkhebel an dessen rückenlehnenteilseitigem Ende verbunden. Somit kann man durch die entsprechende Auslegung und Anordnung des oder der Verbindungsglieder von Rückenlehnenteil und Sitzteil mit dem Schwenkhebel für das Rückenlehnenteil unter entsprechender Abstimmung die Bewegungsabläufe hinsichtlich der Synchronisierung der Neigungsbewegung des Rückenlehnenteils oder die Längsbewegung des Sitzteils unter fester räumlicher Zuordnung bestimmen.In order to keep the individual components of the chair according to the invention as low as possible, the or the connecting members on the backrest part and seat part with the pivot lever for the backrest part of a unit, or are designed in one piece, and the connecting member or the connecting members of backrest part and seat part are preferably with connected to the pivot lever at the backrest Teilseitigem end. Thus, you can determine the motion sequences with respect to the synchronization of the tilting movement of the backrest part or the longitudinal movement of the seat part under a fixed spatial assignment by the appropriate design and arrangement of the link or the backrest part and seat part with the pivot lever for the backrest part.

Insbesondere ist der Schwenkhebel L-förmig gebogen ausgebildet, und sein freies Ende arbeitet mit der ersten, ortsfesten Drehachse des Traggestells zusammen.In particular, the pivot lever is formed bent in an L-shape, and its free end cooperates with the first, fixed axis of rotation of the support frame.

Zusammenfassend wird daher nach der Erfindung ein Stuhl, insbesondere Büro- oder Arbeitsstuhl angegeben, bei welchem das Rückenlehnenteil neigbar und das Sitzteil längsverschieblich und ebenfalls neigbar sind, und der darauf Platz nehmenden Person eine ausreichende Stabilität auch bei der Ausführung der entsprechenden Bewegungen von Rückenlehnenteil und Sitzteil vermittelt. Natürlich läßt sich die Erfindung auch bei anderen Sitzgelegenheiten, wie Relaxliegen, Polstersesseln, Polstermöbeln oder dergleichen, verwirklichen und anwenden. Bei allen diesen Auslegungen und Anwendungen ist es aber nach der Erfindung wichtig, daß die erste Drehachse zur Ausführung einer Neigungsbewegung der Rückenlehne ortsfest unbeweglich in einem vorbestimmten Abstand über dem Sitzteil angeordnet ist, und diese Drehachse in Verlängerung der vertikalen Mittelachse der Stuhlkonstruktion angeordnet ist.In summary, therefore, according to the invention, a chair, in particular office or work chair specified in which the backrest part tiltable and the seat part are longitudinally displaceable and tiltable, and the person taking it sufficient stability even in the execution of the corresponding movements of backrest part and seat part taught. Of course, the invention also in other seating, such as loungers, armchairs, upholstery or the like, realize and apply. In all of these designs and applications, however, it is important according to the invention that the first axis of rotation for carrying out a tilting movement of the backrest is stationary immovably arranged at a predetermined distance above the seat part, and this axis of rotation is arranged in extension of the vertical center axis of the chair structure.

Die Erfindung wird nachstehend an Hand einer bevorzugten Ausführungsform unter Bezugnahme auf die beigefügte Zeichnung ohne jeglichen beschränkenden Charakter näher erläutert. Bei der bevorzugten Ausführungsform wird als Anwendung auf einen Bürostuhl Bezug genommen, jedoch kann in gleicher oder ähnlicher Weise das erfindungsgemäße Lösungsprinzip auch bei allen anderen geeigneten Sitzgelegenheiten und Sitzmöbeln ohne Schwierigkeiten eingesetzt werden. In der Zeichnung zeigt:

Fig. 1
eine perspektivisch auseinander gezogene Darstellung eines Stuhls zur Verdeutlichung seiner Einzelheiten,
Fig. 2
eine perspektivische, skeletthafte Darstellung eines Stuhls im zusammengebauten Zustand mit dem Rückenlehnenteil in Ruheposition oder Ausgangsposition,
Fig.3
eine schematische Seitenansicht des Stuhls nach Figur 2 in einer ersten Teilneigungsposition des Rückenlehnenteils, und
Fig. 4
eine perspektivische skeletthafte Darstellung eines Stuhls mit einer maximalen Neigungsposition des Rückenlehnenteils.
The invention will be described below with reference to a preferred embodiment with reference to the accompanying drawings without any limiting character. In the preferred embodiment, reference will be made to an office chair as an application, but in the same or similar manner, the inventive solution principle may be used without difficulty also for all other suitable seating and seating. In the drawing shows:
Fig. 1
a perspective exploded view of a chair to illustrate its details,
Fig. 2
a perspective, skeletthafte representation of a chair in the assembled state with the backrest part in rest position or starting position,
Figure 3
a schematic side view of the chair of Figure 2 in a first partial inclination position of the backrest part, and
Fig. 4
a perspective skeletal representation of a chair with a maximum inclination position of the backrest part.

In den Figuren der Zeichnung sind gleiche oder ähnliche Teile mit denselben Bezugszeichen versehen.In the figures of the drawing, the same or similar parts are given the same reference numerals.

Unter Bezugnahme auf die Figuren 1 und 2 werden, die Bauelemente der Grundkonstruktion an Hand eines Ausführungsbeispiel in Form eines insgesamt mit 1 bezeichneten Bürostuhls näher erläutert.With reference to Figures 1 and 2, the components of the basic construction will be explained in more detail with reference to an embodiment in the form of an office chair generally designated 1.

Wie aus Figur 1 zu ersehen ist, ist ein einem Fußgestell 2, beispielsweise in Form eines Zentralfußgestells, mittig über ein säulenförmiges Teil 3, welches beispielsweise eine Gasfeder oder dergleichen zur Höhenverstellung des Stuhls enthalten kann, fußgestellmittig um eine zentrale Mittelachse 4 drehbeweglich mit einem Traggestell 5 verbunden. Das Traggestell 5 wird von einem im wesentlichen U-förmig gebogenen Bügel 6 gebildet, welcher einen horizontalen Schenkel 7 und an den Enden des horizontalen Schenkels 7 hochstehende Schenkelenden 8 hat. Etwa in der Mitte des horizontalen Schenkels 7 des Traggestells 5 ist ein Tragarm 9 angebracht, welcher in etwa senkrecht hierzu verläuft, und an seinem auskragenden freien Ende 10 ortsfest eine dritte Drehachse 11 trägt. Die beiden hochstehenden Schenkelenden 8 tragen ortsfest eine erste Drehachse 12. Ferner ist aus Figur 1, sowie in Verbindung mit Figur 2, eine Rückführungseinrichtung 13 zu ersehen, welche beispielsweise in Form eines Federelements ausgebildet ist, und dessen eines Ende fest mit dem auskragenden freien Ende 10 des Tragarms 9 und dessen anderes Ende (siehe Figur 2) in horizontaler Richtung hierzu beabstandet fest mit einem Sitzteil 14 verbunden ist.As can be seen from Figure 1, a foot frame 2, for example in the form of Zentralfußgestells, centered on a columnar part 3, which may include, for example, a gas spring or the like for height adjustment of the chair fußgestellmittig about a central center axis 4 rotatable with a support frame 5 connected. The support frame 5 is of a substantially U-shaped bent bracket 6 is formed, which has a horizontal leg 7 and at the ends of the horizontal leg 7 upstanding leg ends 8. Approximately in the middle of the horizontal leg 7 of the support frame 5, a support arm 9 is mounted, which extends approximately perpendicular thereto, and at its cantilevered free end 10 fixedly carries a third axis of rotation 11. Furthermore, from FIG. 1, as well as in conjunction with FIG. 2, a return device 13 can be seen, which is designed, for example, in the form of a spring element, and whose one end is fixed to the cantilevered free end 10 of the support arm 9 and the other end (see Figure 2) in the horizontal direction spaced therefrom firmly connected to a seat part 14.

Ferner umfaßt der Bürostuhl 1 ein insgesamt mit 15 bezeichnetes Rückenlehnenteil, an welchem beim dargestellten Beispiel beidseitig fest verbunden ein vorzugsweise L-förmig ausgebildeter Schwenkhebel 16 angebracht ist. In der Nähe der Unterseite des Rückenlehnenteils 5 ist ferner ein Verbindungsglied 17 angebracht, welches vorzugsweise einteilig mit dem L-förmigen Schwenkhebel 16 ausgebildet ist und zur Verbindung mit dem Sitzteil 14 dient. Obgleich in den Figuren der Zeichnung beidseitig am Rückenlehnenteil 15 je ein Verbindungsglied 17 vorgesehen ist, kann natürlich auch nur ein zentrales, mittig angeordnetes Verbindungsglied 17 zum Zusammenarbeiten mit dem Sitzteil 14 in entsprechend geeigneter Weise vorgesehen sein.Furthermore, the office chair 1 comprises a total of 15 designated backrest part, on which in the example shown on both sides firmly connected preferably a L-shaped trained pivot lever 16 is mounted. In the vicinity of the underside of the backrest part 5, a connecting member 17 is further attached, which is preferably formed integrally with the L-shaped pivot lever 16 and serves for connection to the seat part 14. Although in the figures of the drawing on both sides of the backrest part 15 each have a connecting member 17 is provided, of course, only a central, centrally arranged connecting member 17 may be provided for cooperation with the seat part 14 in accordance with appropriate manner.

Wie aus Figur 1 in der Einzelteildarstellung zu ersehen ist, hat das Sitzteil 14 an seiner Unterseite beidseitig je eine Gleitführung 18 in der Nähe des vom Rückenlehnenteil 15 abgewandten Endes des Sitzteils 14. Obgleich in der Figur zwei Gleitführungen 18 dargestellt sind, kann natürlich auch nur als Zentralanordnung eine Gleitführung am Sitzteil 14 vorgesehen sein. Ferner hat das Sitzteil 14 an einer geeigneten Stelle eine geeignete Befestigungseinrichtung 19 für ein Ende der Rückführungseinrichtung 13.As can be seen from Figure 1 in the single part illustration, the seat part 14 has on both sides a sliding guide 18 near the end facing away from the backrest portion 15 end of the seat part 14. Although two sliding guides 18 are shown in the figure, of course, only as a central arrangement a sliding guide on the seat part 14 may be provided. Furthermore, the seat part 14 has a suitable fastening means 19 for an end of the return device 13 at a suitable location.

Aus der in Figur 2 gezeigten skeletthaften, perspektivischen Zusammenbauansicht des Bürostuhls 1 ist zu ersehen, daß in der dort dargestellten Ruheposition oder Ausgangsposition des Stuhls 1 das Traggestell 5 mit den hochstehenden Schenkelenden 8 in Verbindung mit dem L-förmigen Schwenkhebel 16 ortsfest die erste Drehachse 12 bildet, um die das Rückenlehnenteil 15 eine Neigungsbewegung ausführen kann. Diese erste Drehachse 12 ist in einem vorbestimmten Abstand von vorzugsweise 50 bis 200 mm oberhalb der Oberkante des Sitzteils 14 mittig zum Fußgestell 2 angeordnet. Das Rückenlehnenteil 15 ist über die Verbindungsglieder 17 um eine zweite Drehachse 20 beweglich, die am Sitzteil 14 gelagert ist. Die dritte Drehachse 11, welche ortsfest am auskragenden freien Ende 10 des Tragarms 9 vorgesehen ist, arbeitet mit den Gleitführungen 18 an der Unterseite des Sitzteils 14 zusammen. Die Rückführungseinrichtung 13, welche einerseits fest an dem auskragenden freien Ende 10 des Tragarms 9 und andererseits fest an dem Sitzteil 14 angebracht ist, bringt die entsprechenden Beaufschlagungskräfte für Rückführungsbewegungen für das Sitzteil 14 und das Rückenlehnenteil 15 in die in Figur 2 dargestellte Ruheposition oder Ausgangsposition auf.From the skeletal, perspective assembly view of the office chair 1 shown in Figure 2 it can be seen that in the rest position or starting position of the chair 1 shown there, the support frame 5 with the upstanding leg ends 8 in connection with the L-shaped pivot lever 16 fixed to the first axis of rotation 12th forms, by which the backrest part 15 can perform a tilting movement. This first axis of rotation 12 is arranged at a predetermined distance of preferably 50 to 200 mm above the upper edge of the seat part 14 centered to the pedestal 2. The backrest part 15 is movable via the connecting members 17 about a second axis of rotation 20 which is mounted on the seat part 14. The third axis of rotation 11, which is fixedly provided on the projecting free end 10 of the support arm 9, cooperates with the sliding guides 18 on the underside of the seat part 14. The return means 13, which on the one hand firmly attached to the cantilevered free end 10 of the support arm 9 and on the other hand fixed to the seat part 14, brings the corresponding Beaufschlagungskräfte for return movements for the seat part 14 and the backrest part 15 in the rest position shown in Figure 2 or home position ,

In Figur 3 ist der Bürostuhl 1 in einer Position mit teilweise geneigtem Rückenlehnenteil 15 gezeigt. Wie aus dieser Figur 3 zu ersehen ist, ist und bleibt die erste Drehachse 12 ortsfest am Traggestell 5, und um diese erste Drehachse 12 führt das Rückenlehnenteil 15 eine Neigungsbewegung aus. Über die Verbindungsglieder 17 unter Zusammenwirken mit der zweiten Drehachse 20 wird bei dieser Neigungsbewegung des Rückenlehnenteils 15 synchron zwangsweise das Sitzteil 14 mitgenommen, und es führt eine Längsverschiebebewegung sowie eine Neigungsbewegung durch Zusammenwirken von dritter Drehachse 11 und Gleitführung 18 am Sitzteil 14 aus. Durch die entsprechende Auslegung der Gleitführung oder der Gleitführungen 18 am Sitzteil 14 kann die Neigungsbewegung des Sitzteils 14 um die dritte Drehachse 11 in geeigneter Weise vorgegeben werden. Beim dargestellten Beispiel führt beispielsweise synchron mit der Längsverschiebebewegung des Sitzteils 14 in Verbindung mit den Verbindungsgliedern 17 von Rückenlehnenteil 15 und Sitzteil 14 um die zweite Drehachse 20 synchron das Sitzteil 14 dank der Zwangsführung von Gleitführungen 18 und der dritten Drehachse 11 eine geringfügig nach oben gerichtete Neigungsbewegung aus.In Figure 3, the office chair 1 is shown in a position with partially inclined backrest portion 15. As can be seen from this figure 3, the first axis of rotation 12 is and remains stationary on the support frame 5, and about this first axis of rotation 12, the backrest portion 15 performs a tilting movement. About the connecting members 17 in cooperation with the second axis of rotation 20 synchronously forced the seat portion 14 is taken in this tilting movement of the backrest portion 15, and it performs a longitudinal displacement movement and a tilting movement by cooperation of the third axis of rotation 11 and slide 18 on the seat part 14. By appropriate design of the sliding guide or the sliding guides 18 on the seat part 14, the inclination movement of the seat part 14 about the third axis of rotation 11 can be specified in a suitable manner. In the example shown, for example, synchronously with the longitudinal displacement movement of the Seat part 14 in conjunction with the links 17 of backrest part 15 and seat part 14 about the second axis of rotation 20 synchronously the seat part 14 thanks to the positive guidance of sliding guides 18 and the third axis of rotation 11 a slightly upward tilting movement.

In Figur 4 ist in einer skeletthaften perspektivischen Gesamtansicht der Bürostuhl 1 in seiner größten Neigungsposition von beispielsweise 45° oder mehr ausgehend von der in Figur 2 dargestellten Ruheposition gezeigt. Die erste Drehachse 12 ist auch in dieser größten Neigungsposition in gleichbleibendem vorbestimmten Abstand zu dem Sitzteil 14 ortsfest am Traggestell angeordnet, und zudem auch fußgestellmittig vorgesehen, so daß der Schwerpunkt einer auf dem Stuhl sitzenden Person immer weitgehend zentrisch über dem Traggestell 5 in allen Neigungspositionen des Rückenlehnenteils 14 bleibt. Für die Verbindungsglieder 17 und unter Zusammenwirken der zweiten Drehachse 20 ist synchron zu der Neigungsbewegung des Rückenlehnenteils 15 das Sitzteil 14 gegenüber Figur 3 noch weiter in Längsrichtung verschoben, und das Verbindungsglied 17 nimmt eine etwa horizontale oder in gleicher Ebene wie das Sitzteil 14 liegende Position ein. Hierdurch erreicht man dann die Endstellung hinsichtlich der Neigungsposition des Rückenlehnenteils 15. Zugleich nimmt aber das Sitzteil 14 auch seine größtmögliche, vorzugsweise nach oben gerichtete Neigungsposition des Sitzteils 14 durch das Zusammenwirken von dritter Drehachse 11 und Gleitführungen 18 am Sitzteil 14 ein. Natürlich können auch hiervon abweichende Neigungsbewegungen des Sitzteils 14 um die dritte Drehachse 11 ausgeführt werden, was von der entsprechenden Ausgestaltung der Gleitführung oder den Gleitführungen 18 abhängig ist, welche am Sitzteil 14 vorgesehen sind.FIG. 4 shows, in a skeletal perspective overall view, the office chair 1 in its greatest inclination position, for example 45 ° or more, starting from the rest position shown in FIG. The first axis of rotation 12 is fixedly arranged on the support frame in this largest inclination position at a constant predetermined distance from the seat part 14, and also provided fußgestellmittig so that the center of gravity of a person sitting on the chair always largely centrally over the support frame 5 in all inclination positions of Backrest part 14 remains. For the connecting members 17 and the interaction of the second axis of rotation 20, the seat portion 14 is moved in relation to the inclination movement of the backrest portion 15 even more longitudinally with respect to Figure 3, and the connecting member 17 occupies a position approximately horizontal or in the same plane as the seat portion 14 , At the same time, however, the seat part 14 also takes its greatest possible, preferably upward inclination position of the seat part 14 by the interaction of the third axis of rotation 11 and slideways 18 on the seat part 14 a. Of course, deviating inclination movements of the seat part 14 about the third rotation axis 11 can also be carried out, which depends on the corresponding design of the sliding guide or the sliding guides 18, which are provided on the seat part 14.

Wie ferner aus Figur 4 zu ersehen ist, nimmt das Federelement der Rückführungseinrichtung 13 eine maximal gespannte Position ein, und die beiden Enden der Rückführungseinrichtung 13 haben den kleinsten Abstand voneinander, im Gegensatz zu der in der Ruheposition des Bürostuhls 1 in Figur 2 gezeigten Stellung der Rückführugnseinrichtung 13. Auch in dieser maximalen Neigungsposition des Rückenlehnenteils 15 des Bürostuhls 1 nach Figur 4 bleibt der Körperschwerpunkt der auf diesem Bürostuhl 1 sitzenden Person im wesentlichen mittig über dem Fußgestell 2, um die gewünschte Stabilität und Sicherheit zu erzielen, und die Drehlagerung des Rückenlehnenteils 15 um die erste ortsfeste drehachse Achse 12 bleibt in dem gewünschten vorbestimmten Abstand über der Oberkante des Sitzteils 14, so daß auch diese maximale Neigungsposition des Rückenlehnenteils 15 eine ausreichende Betriebssicherheit und Stabilität sowie Standsicherheit dem gesamten Bürostuhl 1 verleiht. Somit nimmt die auf dem erfindungsgemäßen Bürostuhl 1 Platz nehmende Person in jeglicher Neigungsposition des Rückenlehnenteils 15 auch in jeder Längsverschiebungsposition und Neigungsposition des Sitzteils 14 eine schwerpunktstabile Lage ein, so daß auch in der in Figur 4 dargestellten Relaxposition die Person kein unangenehmes Gefühl vermittelt bekommt.As can also be seen from Figure 4, the spring element of the return means 13 assumes a maximum tensioned position, and the two ends of the return means 13 have the smallest distance from each other, in contrast to that in the rest position of the office chair 1 in Also in this maximum inclination position of the backrest portion 15 of the office chair 1 of Figure 4, the center of gravity of sitting on this office chair 1 person remains substantially centered above the pedestal 2 in order to achieve the desired stability and safety, and the pivotal mounting of the backrest portion 15 about the first stationary axis of rotation axis 12 remains at the desired predetermined distance above the upper edge of the seat portion 14, so that this maximum inclination position of the backrest portion 15 gives sufficient reliability and stability and stability to the entire office chair 1. Thus, the person sitting on the office chair 1 of the present invention takes in any inclination position of the backrest portion 15 also in each longitudinal displacement position and inclination position of the seat portion 14 a balance stable position, so that even in the relaxation position shown in Figure 4, the person does not get an unpleasant feeling.

Bezugszeichenreference numeral

11
Bürostuhl insgesamtOffice chair in total
22
Fußgstell insgesamtTotal footing
33
säulenförmiges Teilcolumnar part
44
Mittelachsecentral axis
55
Traggestellsupporting frame
66
Bügelhanger
77
horizontaler Schenkelhorizontal thigh
88th
Schenkelendenleg ends
99
TragarmBeam
1010
auskragendes freies Ende des Tragarms 9projecting free end of the support arm 9
1111
dritte Drehachsethird axis of rotation
1212
erste Drehachsefirst axis of rotation
1313
Rückführungseinrichtung insgesamtTotal return device
1414
Sitzteilseat part
1515
RückenlehnenteilBackrest part
1616
L-förmiger SchwenkhebelL-shaped pivot lever
1717
Verbindungsgliedlink
1818
Gleitführungslide
1919
Befestigungseinrichtung für ein Ende der Rückführungseinrichtung 13Fastening device for one end of the return device 13
2020
zweite Drehachsesecond axis of rotation

Claims (16)

  1. Chair, in particular an office or work chair, comprising a backrest part (15) inclinable from a rest position to a plurality of inclination positions with respect to a support frame (5) about a first pivot axis (12), a seat part (14) rotatably connected to the backrest part (15) about a second pivot axis (20), longitudinally displaceable synchronously with the backrest part (15) and inclinable in a positively guided manner with respect to the support frame (5) about a third pivot axis (11), and a restoring device (13) for restoring the backrest part (15) and/or the seat part (14) to their respective rest positions, characterised in that the first pivot axis (12) is arranged on the support frame (5), in the rest position and in all inclination positions of the backrest part (15) and/or of the seat part (14), always at a fixed location at a predetermined horizontal distance, preferably within a range from 50 to 200 mm, above the seat part (14) and centrally to the pedestal, and in that a pivoted lever (16) movable about the first, fixed pivot axis (12) is connected at least to the backrest part (15) in its lower region.
  2. Chair according to claim 1, characterised in that the second pivot axis (20) for the rotatable synchronous connection of backrest part (15) and seat part (14) is located at the height of the seat part (14).
  3. Seat according to claim 1 or 2, characterised in that there is attached to the backrest part (15) at least one connecting member (17) which, upon execution of the inclination movement of the backrest part (15), entrains the seat part (14) in a longitudinal direction relative to the support frame (5) while executing a rotary movement about the second pivot axis (20).
  4. Seat according to any one of the preceding claims, characterised in that the third pivot axis (11) for executing an inclination movement of the seat part (14) is arranged fixedly on the support frame (5) and cooperates in a positively guided manner via a slide element (18) with the underside of the seat part (14).
  5. Chair according to claim 3 or 4, characterised in that connecting members (17) are mounted one on each side of the backrest element (15), and/or slide element parts (18) are provided one on each side of the seat part (14) for cooperation with the third pivot axis (11) on the support frame (5).
  6. Chair according to any one of the preceding claims, characterised in that the restoring device (13) is arranged between the support frame (5) and the seat part (14).
  7. Chair according to any one of the preceding claims, characterised in that the restoring device (13) is formed by a spring device.
  8. Chair according to any one of the preceding claims, characterised in that the support frame (5) is formed by a substantially U-shaped element (6) the horizontal member (7) of which is disposed below the seat part (14) and the end members (8) of which, on which the first pivot axis (12) for the backrest part (15) is arranged, extend above the seat part (14).
  9. Chair according to claim 8, characterised in that the horizontal member (7) is connected approximately centrally to a pedestal (2).
  10. Chair according to claim 9, characterised in that the pedestal (2) is a central pedestal, a rocking frame or the like.
  11. Chair according to any one of claims 8 to 10, characterised in that the horizontal member (7) of the support frame (5) is provided with a support arm (9) disposed substantially perpendicularly thereto for the third pivot axis (11) cooperating with the seat part (14) for executing an inclination movement.
  12. Chair according to claim 11, characterised in that the support arm (9) is provided approximately centrally on the horizontally disposed member (7) of the support frame (5).
  13. Chair according to claim 11 or 12, characterised in that the third pivot axis (11) for the inclination movement of the seat part (14) is arranged on the free end (10) of the support arm (9) and extends parallel to the seat part (14).
  14. Chair according to any one of claims 11 to 13, characterised in that the restoring device (13) is connected at one end to the free end (10) of the support arm (9) and at the other end to the seat part (14).
  15. Chair according to any one of claims 5 to 14, characterised in that the connecting members (17) of backrest part (15) and seat part (14) are fixedly connected to the backrest end of the pivoted lever (16) for the backrest part (15).
  16. Chair according to any one of the preceding claims, characterised in that the pivoted lever (16) is L-shaped and its free end cooperates with the first, fixed pivot axis (12) of the support frame (5).
EP04710835A 2003-02-18 2004-02-13 Chair, especially an office or work chair Expired - Lifetime EP1596691B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10306851A DE10306851A1 (en) 2003-02-18 2003-02-18 Office chair has back rest which reclines about axis at ends of L-shaped levers mounted on its base, seat sliding forward in synchronization with back rest and axis maintaining constant position above seat
DE10306851 2003-02-18
PCT/EP2004/001363 WO2004073457A1 (en) 2003-02-18 2004-02-13 Chair, especially an office or work chair

Publications (2)

Publication Number Publication Date
EP1596691A1 EP1596691A1 (en) 2005-11-23
EP1596691B1 true EP1596691B1 (en) 2006-11-15

Family

ID=32747997

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04710835A Expired - Lifetime EP1596691B1 (en) 2003-02-18 2004-02-13 Chair, especially an office or work chair

Country Status (8)

Country Link
US (1) US7484803B2 (en)
EP (1) EP1596691B1 (en)
CN (1) CN100444764C (en)
AT (1) ATE345068T1 (en)
DE (2) DE10306851A1 (en)
ES (1) ES2277238T3 (en)
HK (1) HK1087900A1 (en)
WO (1) WO2004073457A1 (en)

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Also Published As

Publication number Publication date
CN100444764C (en) 2008-12-24
WO2004073457A1 (en) 2004-09-02
EP1596691A1 (en) 2005-11-23
US7484803B2 (en) 2009-02-03
DE502004002007D1 (en) 2006-12-28
HK1087900A1 (en) 2006-10-27
US20060244294A1 (en) 2006-11-02
CN1750777A (en) 2006-03-22
ATE345068T1 (en) 2006-12-15
DE10306851A1 (en) 2004-08-26
ES2277238T3 (en) 2007-07-01

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