EP2508102B1 - Chair - Google Patents

Chair Download PDF

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Publication number
EP2508102B1
EP2508102B1 EP12155797.9A EP12155797A EP2508102B1 EP 2508102 B1 EP2508102 B1 EP 2508102B1 EP 12155797 A EP12155797 A EP 12155797A EP 2508102 B1 EP2508102 B1 EP 2508102B1
Authority
EP
European Patent Office
Prior art keywords
seat
axis
rotation
support arms
chair according
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.)
Active
Application number
EP12155797.9A
Other languages
German (de)
French (fr)
Other versions
EP2508102A1 (en
Inventor
Carsten Gehner
Heiko Büttner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wilkhahn Wilkening and Hahne GmbH and Co KG
Original Assignee
Wilkhahn Wilkening and Hahne GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Publication of EP2508102A1 publication Critical patent/EP2508102A1/en
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Publication of EP2508102B1 publication Critical patent/EP2508102B1/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
    • A47C9/00—Stools for specified purposes
    • A47C9/002—Stools for specified purposes with exercising means or having special therapeutic or ergonomic effects
    • 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
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/14—Seat parts of adjustable shape; elastically mounted ; adaptable to a user contour or ergonomic seating positions
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/14—Seat parts of adjustable shape; elastically mounted ; adaptable to a user contour or ergonomic seating positions
    • A47C7/144—Seat parts of adjustable shape; elastically mounted ; adaptable to a user contour or ergonomic seating positions with array of movable supports
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/443—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with coil springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/445—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with bar or leaf springs
    • A47C7/4454—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with bar or leaf springs of torsion type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/448—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with resilient blocks

Definitions

  • the invention relates to a chair with a seat and a seat mechanism, wherein the seat is coupled to the seat mechanism such that the seat is pivotally mounted in a front end region about a first axis of rotation, which is aligned parallel to the knee axis of a user.
  • the DE 10 2007 042 032 B3 relates to a dental chair having a seat with two leg supports tiltable parallel to the knee axis of a user. Both leg rests are supported on a rocker, wherein the rocker causes an upward lifting of the other leg rest when pivoting one of the two leg rests downwards.
  • a chair is known with a seat and a seat mechanism, wherein the seat mechanism allows a lateral pivoting movement of the seat and the seat and the seat mechanism are formed such that the one side of the seat in the lateral pivotal movement of the seat independently of the other side of the seat movable is. Furthermore, both sides of the seat are pivotally mounted about an axis of rotation, which is aligned parallel to the knee axis of a user.
  • the seat mechanism has two lateral, independently responding support arms, on which the seat is supported in its front and rear area by means of ball joints.
  • the present invention is based on the object of specifying an alternative embodiment of this new movement concept.
  • the chair according to the invention has a seat and a seat mechanism, wherein the seat is coupled to the seat mechanism such that the seat is pivotally mounted in a front end region about a first axis of rotation, which is aligned parallel to the knee axis of a user. Furthermore, the seat in its front end region is also rotatably supported on the seat mechanism about a second axis of rotation aligned perpendicular to the first axis of rotation.
  • the seat mechanism allows a lateral pivotal movement of the seat, wherein the seat and the seat mechanism are formed such that the one side of the seat during the lateral pivotal movement of the seat is movable independently of the other side of the seat.
  • a preferred embodiment of the invention can be provided in particular that it comes with the lateral pivotal movement of the seat to a rotation of the seat about the second axis of rotation.
  • the seat mechanism on two side, independently responding support arms, to which the seat is coupled to a rear area.
  • the two support arms can be pivoted in particular about a pivot axis, which is aligned parallel to the first axis of rotation and disposed below the front end portion of the seat.
  • the distance between the first axis of rotation of the seat and the pivot axis of the support arms is in particular 2 to 8 cm, preferably 3 to 5 cm.
  • the front end region of the seat can be supported on the seat mechanism via at least one slide bearing provided between the seat and the seat mechanism.
  • the seat may include a seat and a backrest, wherein the support arms are coupled in a lower portion of the backrest to the seat.
  • a desired synchronous ratio of seat tilt to the backrest tilt can be adjusted, on the one hand by the distance between the pivot axis of the support arms and the coupling between the support arms and backrest and on the other hand by the distance of the pivot axis of the support arms of the first axis of rotation of the seat is determined.
  • a chair is shown in an upright position, which may be, for example, an office swivel chair. It consists essentially of a seat 1 and a seat mechanism 2.
  • the seat 1 in turn has a seat 10 and a backrest 11 which are movable relative to each other.
  • the relative mobility can be formed by a suitable pivoting or bending zone, wherein seat 10 and backrest 11 can be formed both in one piece and by separate parts.
  • the seat mechanism has a base support 3, which is fastened to an arbitrarily designed base frame 4 and serves to hold the seat 1.
  • the seat mechanism 2 further comprises two lateral, independently responding support arms 21, 22, to which the seat 1 in a rear area 1b, in particular in a lower region of the backrest 11, is docked.
  • ball joints 23, 24 come into consideration, which are held in corresponding receptacles on the backrest 11.
  • the support arms 21, 22 are pivotable about a supported on the base support 3 pivot axis 25 which is disposed below the front end portion 1 a of the seat 1.
  • the seat 1 is pivotally mounted in its front region 1a about a separate axis of rotation 12, wherein the distance a between the first axis of rotation 12 and the pivot axis 25 of the support arms 2 to 8 cm, preferably 3 to 5 cm.
  • the chair can be of his in the Fig. 1a-1e shown upright position in a rearwardly inclined position according to the Fig. 2a-2d be brought by the user shifts his weight to the rear.
  • Fig. 1a As if from a comparison of Fig. 1a and Fig. 2a It can be seen, it comes to a pivotal movement of the support arms 21, 22 about its pivot axis 25 and a pivotal movement of the seat 1 about its first axis of rotation 12.
  • the seat 1 is fixed between its first axis of rotation 12 and the rigid support arms 21, 22nd mounted ball joints 23, 24 clamped. Due to the distance a (see Fig. 1d ) between the first axis of rotation 12 and the pivot axis 25 of the support arms occurs in a pivoting movement of the upright position according to Fig. 1a in the backward inclined position according to Fig. 2a to an extension of the distance b, b 1 between the first axis of rotation 12 and the ball joints 23 and 24 8 (see. Fig. 1d and Fig. 2d ).
  • This synchronous ratio can be defined on the one hand by the distance between the pivot axis 25 of the support arms and the coupling between the support arm and backrest (position of the ball joints 23, 24) and on the other hand by the distance a of the pivot axis 25 of the support arms of the first axis of rotation 12 of the seat.
  • the support arms 21, 22 cooperate in the region of its pivot axis 25 with at least one suitable spring element, for example a torsion or spiral spring, so that the support arms always move the seat to the upright position Fig. 1a to press.
  • the spring element is expediently provided with suitable adjustment means in order to be able to adapt the chair to the actual weight of a user. Further adjustment means, such as in particular a locking of the chair in the upright position are conceivable.
  • the seat mechanism described above thus enables a pivoting of the seat about a parallel to the knee axis of a user aligned and arranged in the front region of the seat axis of rotation.
  • the seat 1 is also rotatably mounted on the seat mechanism 2 or on the base support 3 in its front end region 1a about a second rotation axis 13 oriented perpendicularly to the first rotation axis 12.
  • the second axis of rotation 13 is disposed in the center of the seat 1 in its front end portion 1a. In the upright position according to the Fig. 1a-1e intersect the first and second rotation axis 12, 13. Also, the pivot axis 25 and the second axis of rotation 13 intersect in this position. It would also be quite conceivable that the three axis are arranged offset from one another.
  • the two axes of rotation 12, 13 of the seat 1 are in the illustrated embodiment by one of the base support 3 about the first axis 12th pivotally supported bolt 5 realized, which simultaneously allows rotation of the seat 10 about the longitudinal axis of the bolt, which forms the second axis of rotation 13.
  • the bolt 5 has in the illustrated embodiment, a protruding head 5a and is connected at its other end fixed to a shoe, which is guided in the base support 3 in the manner of a slotted guide for carrying out the pivoting movement about the first axis of rotation 12, as shown in the Fig. 1d . 1e and 2d evident.
  • the seat 1 is thus clamped in the region of the bolt 5 in its front region and by the two ball joints 23, 24 in its rear region in the seat mechanism. Due to the rigid support arms 21, 22 is a rotational movement of the seat 1 about the second axis of rotation 13 thus possible only in conjunction with a simultaneous pivotal movement of the seat about the first axis of rotation 12.
  • the pivoting movement of the seat 1 about the first axis of rotation 12 can thus be superimposed by a lateral pivoting movement of the seat.
  • This means that, for example, the rear left end of the seat 10 is inclined further down than the right rear end.
  • By the connection of seat 10 and backrest 11 thus follows also the backrest 11 such a lateral movement.
  • the seat 1 is supported in its front region via two plain bearings 6, 7 on the seat mechanism 2 and the base support 3 from.
  • a respective sliding bearing 6, 7 is provided laterally of the bolt 13 between the base support 3 and the seat 1 (see Fig. 1c and 1e ).
  • Fig. 3a-3c show the situation in which the right side of the seat 1, regardless of the left side of the seat performs a lateral pivoting movement. It comes between the seat 1 and the plain bearings 6, 7 to a relative movement, like this particular out Fig. 3c is apparent. To perform this movement, the seat has a corresponding twisting ability.
  • the chair can be tilted not only straight to the rear, but also to one of the two sides. In each position of the chair, a sufficiently strong pressure from the backrest 11 acts on the user's back, so that it feels secure in any position.
  • the embodiment according to the Fig. 4a and 4b also shows a position of the chair in a laterally inclined position (similar to the Fig. 3a to 3c ).
  • the support arms 21 ', 22' cooperate with a spring element 26 configured as a spiral spring.
  • the support arms 21 ', 22' are in the front half so cranked to each other that the two support arms are arranged in this area parallel to each other and with a relatively small distance from each other.
  • the spring element 26 is arranged, which is supported at one end to an abutment 3a on the base support and with its other end with two support arms 21 ', 22' in contact, wherein the support arms, the spring element 26 together, but also independently can press in a rotation about the pivot axis 25.
  • each swivel arm could be assigned in each case a spring element.

Landscapes

  • 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)

Description

Die Erfindung betrifft einen Stuhl mit einem Sitz und einer Sitzmechanik, wobei der Sitz mit der Sitzmechanik derart gekoppelt ist, dass der Sitz in einem vorderen Endbereich um eine erste Drehachse schwenkbar gelagert ist, die parallel zur Knieachse eines Benutzers ausgerichtet ist.The invention relates to a chair with a seat and a seat mechanism, wherein the seat is coupled to the seat mechanism such that the seat is pivotally mounted in a front end region about a first axis of rotation, which is aligned parallel to the knee axis of a user.

Die DE 10 2007 042 032 B3 betrifft einen Zahnarztstuhl, der einen Sitz mit zwei, parallel zur Knieachse eines Benutzers neigbaren Beinauflagen aufweist. Beide Beinauflagen stützen sich auf einer Wippe ab, wobei die Wippe beim Verschwenken einer der beiden Beinauflagen nach unten eine Anhebung der anderen Beinauflage nach oben bewirkt.The DE 10 2007 042 032 B3 relates to a dental chair having a seat with two leg supports tiltable parallel to the knee axis of a user. Both leg rests are supported on a rocker, wherein the rocker causes an upward lifting of the other leg rest when pivoting one of the two leg rests downwards.

Aus der EP-A1-07 121 220 ist ein Stuhl mit einem Sitz und einer Sitzmechanik bekannt, wobei die Sitzmechanik eine seitliche Schwenkbewegung des Sitzes erlaubt und der Sitz und die Sitzmechanik derart ausgebildet sind, dass die eine Seite des Sitzes bei der seitlichen Schwenkbewegung des Sitzes unabhängig von der anderen Seite des Sitzes bewegbar ist. Weiterhin sind beiden Seiten des Sitzes um eine Drehachse schwenkbar gelagert, die parallel zur Knieachse eines Benutzers ausgerichtet ist.From the EP-A1-07 121 220 a chair is known with a seat and a seat mechanism, wherein the seat mechanism allows a lateral pivoting movement of the seat and the seat and the seat mechanism are formed such that the one side of the seat in the lateral pivotal movement of the seat independently of the other side of the seat movable is. Furthermore, both sides of the seat are pivotally mounted about an axis of rotation, which is aligned parallel to the knee axis of a user.

Im Gegensatz zu den bis dato verfolgten Konzepten, bei welchen der gesamte Sitz und insbesondere die gesamte Sitzfläche als starres Element nach rechts oder links kippen, ist bei dem aus der EP-A1-07 121 220 bekannten Stuhl die rechte und linke Seite des Sitzes unabhängig voneinander bewegbar. Ein derartiger Stuhl ist in der Lage, dem Benutzer bei seinen natürlichen dreidimensionalen Bewegungen zufolgen und dabei dennoch in der geraden Haltung genügend Sicherheit zu bieten.In contrast to the hitherto pursued concepts in which the entire seat and in particular the entire seat tilt as a rigid element to the right or left, in which from the EP-A1-07 121 220 known chair, the right and left side of the seat independently movable. Such a chair is able to follow the user in his natural three-dimensional movements while still providing sufficient security in the straight posture.

In einer bevorzugten Ausgestaltung dieses neuen Konzeptes weist die Sitzmechanik zwei seitliche, unabhängig voneinander reagierende Tragarme auf, an welchen der Sitz in seinem vorderen und hinteren Bereich mittels Kugelgelenken gehaltert ist.In a preferred embodiment of this new concept, the seat mechanism has two lateral, independently responding support arms, on which the seat is supported in its front and rear area by means of ball joints.

Der vorliegenden Erfindung liegt nun die Aufgabe zugrunde, eine Alternative Ausgestaltung dieses neuen Bewegungskonzeptes anzugeben.The present invention is based on the object of specifying an alternative embodiment of this new movement concept.

Erfindungsgemäß wird diese Aufgage durch die Merkmale des Anspruches 1 gelöst.According to the invention, this is achieved by the features of claim 1.

Der erfindungsgemäße Stuhl weist einen Sitz und einer Sitzmechanik auf, wobei der Sitz mit der Sitzmechanik derart gekoppelt ist, dass der Sitz in einem vorderen Endbereich um eine erste Drehachse schwenkbar gelagert ist, die parallel zur Knieachse eines Benutzers ausgerichtet ist. Weiterhin ist der Sitz in seinem vorderen Endbereich zudem um eine zur ersten Drehachse senkrecht ausgerichtete zweite Drehachse drehbar an der Sitzmechanik gehaltert. Außerdem ermöglicht die Sitzmechanik eine seitliche Schwenkbewegung des Sitzes, wobei der Sitz und die Sitzmechanik derart ausgebildet sind, dass die eine Seite des Sitzes bei der seitlichen Schwenkbewegung des Sitzes unabhängig von der anderen Seite des Sitzes bewegbar ist.The chair according to the invention has a seat and a seat mechanism, wherein the seat is coupled to the seat mechanism such that the seat is pivotally mounted in a front end region about a first axis of rotation, which is aligned parallel to the knee axis of a user. Furthermore, the seat in its front end region is also rotatably supported on the seat mechanism about a second axis of rotation aligned perpendicular to the first axis of rotation. In addition, the seat mechanism allows a lateral pivotal movement of the seat, wherein the seat and the seat mechanism are formed such that the one side of the seat during the lateral pivotal movement of the seat is movable independently of the other side of the seat.

Durch die zweite Drehachse lässt sich eine definierte seitliche Schwenkbewegung des Sitzes realisieren.By the second axis of rotation can be realized a defined lateral pivotal movement of the seat.

Weitere Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Further embodiments of the invention are the subject of the dependent claims.

In einer bevorzugten Ausbildung der Erfindung kann insbesondere vorgesehen werden, dass es bei der seitlichen Schwenkbewegung des Sitzes zu einer Drehung des Sitzes um die zweite Drehachse kommt.In a preferred embodiment of the invention can be provided in particular that it comes with the lateral pivotal movement of the seat to a rotation of the seat about the second axis of rotation.

In einer weiteren Ausgestaltung der Erfindung weist die Sitzmechanik zwei seitliche, unabhängig voneinander reagierende Tragarme auf, an die der Sitz an einem hinteren Bereich angekoppelt ist. Dabei können die beiden Tragarme insbesondere um eine Schwenkachse verschwenkt werden, die parallel zur ersten Drehachse ausgerichtet und unterhalb des vorderen Endbereichs des Sitzes angeordnet ist. Der Abstand zwischen der ersten Drehachse des Sitzes und der Schwenkachse der Tragarme beträgt insbesondere 2 bis 8 cm, vorzugsweise 3 bis 5 cm.In a further embodiment of the invention, the seat mechanism on two side, independently responding support arms, to which the seat is coupled to a rear area. In this case, the two support arms can be pivoted in particular about a pivot axis, which is aligned parallel to the first axis of rotation and disposed below the front end portion of the seat. The distance between the first axis of rotation of the seat and the pivot axis of the support arms is in particular 2 to 8 cm, preferably 3 to 5 cm.

Weiterhin kann sich der vordere Endbereich des Sitzes über wenigstens ein zwischen Sitz und Sitzmechanik vorgesehenes Gleitlager an der Sitzmechanik abstützen. Außerdem kann der Sitz eine Sitzfläche und einer Rückenlehne umfassen, wobei die Tragarme in einem unteren Bereich der Rückenlehne am Sitz angekoppelt sind.Furthermore, the front end region of the seat can be supported on the seat mechanism via at least one slide bearing provided between the seat and the seat mechanism. In addition, the seat may include a seat and a backrest, wherein the support arms are coupled in a lower portion of the backrest to the seat.

Durch die Anbindung des Sitzes an die Tragarme kann ein gewünschtes Synchronverhältnis von Sitzneigung zur Rückenlehnenneigung eingestellt werden, das einerseits durch den Abstand zwischen der Schwenkachse der Tragarme und der Ankopplung zwischen den Tragarmen und Rückenlehne und andererseits durch den Abstand der Schwenkachse der Tragarme von der ersten Drehachse des Sitzes bestimmt wird.By the connection of the seat to the support arms, a desired synchronous ratio of seat tilt to the backrest tilt can be adjusted, on the one hand by the distance between the pivot axis of the support arms and the coupling between the support arms and backrest and on the other hand by the distance of the pivot axis of the support arms of the first axis of rotation of the seat is determined.

Weitere Vorteile und Ausgestaltungen der Erfindung werden im Folgenden anhand der Beschreibung und der Zeichnung näher erläutert.Further advantages and embodiments of the invention will be explained in more detail below with reference to the description and the drawing.

In der Zeichnung zeigen

Fig. 1a
eine schematische Seitenansicht des erfindungsgemäßen Stuhles in einer aufrechten Stellung,
Fig. 1b
Rückansicht des Stuhles gemäß Fig. 1a,
Fig. 1c
Draufsicht des Stuhles gemäß Fig. 1a
Fig. 1d
vergrößerte Detailansicht der Anbindung zwischen Sitz und Sitzmechanik in der Stellung des Stuhles gemäß Fig. 1a,
Fig. 1e
Vorderansicht des Stuhles gemäß Fig. 1a,
Fig. 2a
eine schematische Seitenansicht des erfindungsgemäßen Stuhles in einer nach hinten geneigten Stellung,
Fig. 2b
Rückansicht des Stuhles gemäß Fig. 2a,
Fig. 2c
Draufsicht des Stuhles gemäß Fig. 2a,
Fig. 2d
vergrößerte Detailansicht der Anbindung zwischen Sitz und Sitzmechanik in der Stellung des Stuhles gemäß Fig. 2a,
Fig. 3a
eine schematische Seitenansicht des erfindungsgemäßen Stuhles in einer seitlich geneigten Stellung,
Fig. 3b
Rückansicht des Stuhles gemäß Fig. 3a,
Fig. 3c
Draufsicht des Stuhles gemäß Fig. 3a,
Fig. 4a
schematische Draufsicht eins Stuhls in einer seitlich geneigten Stellung mit einer alternativen Abfederung und
Fig. 4b
eine schematische Seitenansicht des Stuhles gemäß Fig. 4a.
In the drawing show
Fig. 1a
a schematic side view of the chair according to the invention in an upright position,
Fig. 1b
Rear view of the chair according to Fig. 1a .
Fig. 1c
Top view of the chair according to Fig. 1a
Fig. 1d
enlarged detail view of the connection between the seat and seat mechanism in the position of the chair according to Fig. 1a .
Fig. 1e
Front view of the chair according to Fig. 1a .
Fig. 2a
a schematic side view of the chair according to the invention in a rearwardly inclined position,
Fig. 2b
Rear view of the chair according to Fig. 2a .
Fig. 2c
Top view of the chair according to Fig. 2a .
Fig. 2d
enlarged detail view of the connection between the seat and seat mechanism in the position of the chair according to Fig. 2a .
Fig. 3a
a schematic side view of the chair according to the invention in a laterally inclined position,
Fig. 3b
Rear view of the chair according to Fig. 3a .
Fig. 3c
Top view of the chair according to Fig. 3a .
Fig. 4a
schematic plan view of a chair in a laterally inclined position with an alternative cushioning and
Fig. 4b
a schematic side view of the chair according to Fig. 4a ,

In Fig. 1a-1e ist ein Stuhl in einer aufrechten Stellung dargestellt, bei dem es sich beispielsweise um einen Bürodrehstuhl handeln kann. Er besteht im Wesentlichen aus einem Sitz 1 und einer Sitzmechanik 2. Der Sitz 1 weist wiederum eine Sitzfläche 10 und eine Rückenlehne 11 auf, die relativ zueinander beweglich sind. Die relative Beweglichkeit kann dabei durch eine geeignete Schwenk- oder Biegezone gebildet werden, wobei Sitzfläche 10 und Rückenlehne 11 sowohl einstückig als auch durch separate Teile ausgebildet sein können.In Fig. 1a-1e a chair is shown in an upright position, which may be, for example, an office swivel chair. It consists essentially of a seat 1 and a seat mechanism 2. The seat 1 in turn has a seat 10 and a backrest 11 which are movable relative to each other. The relative mobility can be formed by a suitable pivoting or bending zone, wherein seat 10 and backrest 11 can be formed both in one piece and by separate parts.

Die Sitzmechanik weist einen Basisträger 3 auf, der an einem beliebig ausgestalteten Fußgestell 4 befestigt ist und zur Halterung des Sitzes 1 dient. Im dargestellten Ausführungsbeispiel umfasst die Sitzmechanik 2 weiterhin zwei seitliche, unabhängig voneinander reagierende Tragarme 21, 22, an welchen der Sitz 1 in einem hinteren Bereich 1b, insbesondere in einem unteren Bereich der Rückenlehne 11, angekoppelt ist. Als Anbindung kommen dabei insbesondere Kugelgelenke 23, 24 in Betracht, die in entsprechenden Aufnahmen an der Rückenlehne 11 gehaltert sind. Die Tragarme 21, 22 sind um eine am Basisträger 3 gehalterte Schwenkachse 25 verschwenkbar, die unterhalb des vorderen Endbereichs 1a des Sitzes 1 angeordnet ist. Der Sitz 1 ist in seinem vorderen Bereich 1a um eine separate Drehachse 12 schwenkbar gelagert, wobei der Abstand a zwischen der ersten Drehachse 12 und der Schwenkachse 25 der Tragarme 2 bis 8 cm, vorzugsweise 3 bis 5 cm beträgt.The seat mechanism has a base support 3, which is fastened to an arbitrarily designed base frame 4 and serves to hold the seat 1. In the illustrated embodiment, the seat mechanism 2 further comprises two lateral, independently responding support arms 21, 22, to which the seat 1 in a rear area 1b, in particular in a lower region of the backrest 11, is docked. In particular ball joints 23, 24 come into consideration, which are held in corresponding receptacles on the backrest 11. The support arms 21, 22 are pivotable about a supported on the base support 3 pivot axis 25 which is disposed below the front end portion 1 a of the seat 1. The seat 1 is pivotally mounted in its front region 1a about a separate axis of rotation 12, wherein the distance a between the first axis of rotation 12 and the pivot axis 25 of the support arms 2 to 8 cm, preferably 3 to 5 cm.

Der Stuhl kann von seiner in den Fig. 1a-1e gezeigten Aufrechtenstellung auch in eine nach hinten geneigte Stellung gemäß den Fig. 2a-2d gebracht werden, indem der Benutzer sein Gewicht nach hinten verlagert.The chair can be of his in the Fig. 1a-1e shown upright position in a rearwardly inclined position according to the Fig. 2a-2d be brought by the user shifts his weight to the rear.

Wie aus einem Vergleich der Fig. 1a und Fig. 2a ersichtlich wird, kommt es dabei zu einer Schwenkbewegung der Tragarme 21, 22 um ihre Schwenkachse 25 und um eine Schwenkbewegung des Sitzes 1 um seine erste Drehachse 12. Der Sitz 1 ist fest zwischen seiner ersten Drehachse 12 und den an den starren Tragarmen 21, 22 angebrachten Kugelgelenken 23, 24 eingespannt. Aufgrund des Abstandes a (siehe Fig. 1d) zwischen der ersten Drehachse 12 und der Schwenkachse 25 der Tragarme kommt es bei einer Schwenkbewegung von der aufrechten Stellung gemäß Fig. 1a in die nach hinten geneigte Stellung gemäß Fig. 2a zu einer Verlängerung des Abstandes b, b1 zwischen der ersten Drehachse 12 und den Kugelgelenken 23 bzw. 24 8 (vgl. Fig. 1d und Fig. 2d).As if from a comparison of Fig. 1a and Fig. 2a It can be seen, it comes to a pivotal movement of the support arms 21, 22 about its pivot axis 25 and a pivotal movement of the seat 1 about its first axis of rotation 12. The seat 1 is fixed between its first axis of rotation 12 and the rigid support arms 21, 22nd mounted ball joints 23, 24 clamped. Due to the distance a (see Fig. 1d ) between the first axis of rotation 12 and the pivot axis 25 of the support arms occurs in a pivoting movement of the upright position according to Fig. 1a in the backward inclined position according to Fig. 2a to an extension of the distance b, b 1 between the first axis of rotation 12 and the ball joints 23 and 24 8 (see. Fig. 1d and Fig. 2d ).

Nachdem der Sitz 1 aber zwischen der ersten Drehachse 12 und den Kugelgelenken 23, 24 fest eingespannt ist, kommt es zu einer Relativbewegung zwischen Sitzfläche 10 und Rückenlehne 11, indem sich der Winkel zwischen Sitzfläche 10 und Rückenlehne 11 vergrößert. Bei dieser Bewegung des Sitzes findet somit einerseits eine Sitzneigung und andererseits einer Rückenlehneneigung statt. Das Verhältnis von Sitzneigung zu Rückenlehneneigung wird üblicherweise als Synchronverhältnis bezeichnet, wobei ein Synchronverhältnis von 1 zu 2 als besonders angenehm empfunden wird. Demzufolge ist die Rückenlehnenneigung, gemessen zur Standfläche, doppeltet so groß wie die Sitzneigung. Dieses Synchronverhältnis lässt sich einerseits durch den Abstand zwischen der Schwenkachse 25 der Tragarme und der Ankopplung zwischen Tragarm und Rückenlehne (Lage der Kugelgelenke 23, 24) und andererseits durch den Abstand a der Schwenkachse 25 der Tragarme von der ersten Drehachse 12 des Sitzes festlegen.After the seat 1 but is clamped firmly between the first axis of rotation 12 and the ball joints 23, 24, there is a relative movement between the seat 10 and the backrest 11 by the angle between the seat 10 and the backrest 11 increases. In this movement of the seat thus takes place on the one hand, a seat tilt and on the other hand, a backrest inclination. The ratio of seat tilt to backrest tilt is commonly referred to as a synchronous ratio, with a 1: 2 ratio of synchrony being particularly comfortable is felt. As a result, the backrest inclination, measured in relation to the footprint, is twice as large as the seat inclination. This synchronous ratio can be defined on the one hand by the distance between the pivot axis 25 of the support arms and the coupling between the support arm and backrest (position of the ball joints 23, 24) and on the other hand by the distance a of the pivot axis 25 of the support arms of the first axis of rotation 12 of the seat.

Die Tragarme 21, 22 wirken im Bereich ihrer Schwenkachse 25 mit wenigstens einem geeigneten Federelement, beispielsweise einer Torsions- oder Spiralfeder, zusammen, sodass die Tragarme den Sitz immer in die aufrechte Stellung gemäß Fig. 1a drücken. Das Federelement ist zweckmäßigerweise mit geeigneten Einstellmitteln versehen, um den Stuhl an das tatsächliche Gewicht eines Benutzers anpassen zu können. Weitere Einstellmittel, wie insbesondere eine Arretierung des Stuhles in der aufrechten Stellung sind denkbar.The support arms 21, 22 cooperate in the region of its pivot axis 25 with at least one suitable spring element, for example a torsion or spiral spring, so that the support arms always move the seat to the upright position Fig. 1a to press. The spring element is expediently provided with suitable adjustment means in order to be able to adapt the chair to the actual weight of a user. Further adjustment means, such as in particular a locking of the chair in the upright position are conceivable.

Die oben beschriebene Sitzmechanik ermöglicht somit ein Schwenken des Sitzes um eine parallel zur Knieachse eines Benutzers ausgerichtete und im vorderen Bereich des Sitzes angeordnete Drehachse. In einer weiteren Ausgestaltung der Erfindung ist der Sitz 1 in seinem vorderen Endbereich 1a zudem um eine zur ersten Drehachse 12 senkrecht ausgerichtete zweite Drehachse 13 drehbar an der Sitzmechanik 2 bzw. am Basisträger 3 gelagert.The seat mechanism described above thus enables a pivoting of the seat about a parallel to the knee axis of a user aligned and arranged in the front region of the seat axis of rotation. In a further embodiment of the invention, the seat 1 is also rotatably mounted on the seat mechanism 2 or on the base support 3 in its front end region 1a about a second rotation axis 13 oriented perpendicularly to the first rotation axis 12.

Im dargestellten Ausführungsbeispiel ist die zweite Drehachse 13 in der Mitte des Sitzes 1 in seinem vorderen Endbereich 1a angeordnet. In der aufrechten Stellung gemäß den Fig. 1a-1e schneiden sich die erste und zweite Drehachse 12, 13. Auch die Schwenkachse 25 und die zweite Drehachse 13 schneiden sich in dieser Stellung. Es wäre aber auch durchaus denkbar, dass die drei Achse zueinander versetzt angeordnet sind.In the illustrated embodiment, the second axis of rotation 13 is disposed in the center of the seat 1 in its front end portion 1a. In the upright position according to the Fig. 1a-1e intersect the first and second rotation axis 12, 13. Also, the pivot axis 25 and the second axis of rotation 13 intersect in this position. It would also be quite conceivable that the three axis are arranged offset from one another.

Die beiden Drehachsen 12, 13 des Sitzes 1 werden im dargestellten Ausführungsbeispiel durch einen am Basisträger 3 um die erste Achse 12 schwenkbeweglich gehalterten Bolzen 5 realisiert, der gleichzeitig eine Drehung des Sitzes 10 um die Längsachse des Bolzens erlaubt, welche die zweite Drehachse 13 bildet. Der Bolzen 5 weist im dargestellten Ausführungsbeispiel einen überstehenden Kopf 5a auf und ist an seinem anderen Ende fest mit einem Gleitschuh verbunden, der im Basisträger 3 nach Art einer Kulissenführung zur Ausführung der Schwenkbewegung um die erste Drehachse 12 geführt ist, wie das aus den Fig. 1d, 1e und 2d hervorgeht.The two axes of rotation 12, 13 of the seat 1 are in the illustrated embodiment by one of the base support 3 about the first axis 12th pivotally supported bolt 5 realized, which simultaneously allows rotation of the seat 10 about the longitudinal axis of the bolt, which forms the second axis of rotation 13. The bolt 5 has in the illustrated embodiment, a protruding head 5a and is connected at its other end fixed to a shoe, which is guided in the base support 3 in the manner of a slotted guide for carrying out the pivoting movement about the first axis of rotation 12, as shown in the Fig. 1d . 1e and 2d evident.

Der Sitz 1 ist somit im Bereich des Bolzens 5 in seinem vorderen Bereich und durch die beiden Kugelgelenke 23, 24 in seinem hinteren Bereich in der Sitzmechanik eingespannt. Aufgrund der starren Tragarme 21, 22 ist eine Drehbewegung des Sitzes 1 um die zweite Drehachse 13 somit nur in Verbindung mit einer gleichzeitigen Schwenkbewegung des Sitzes um die erste Drehachse 12 möglich. Die Schwenkbewegung des Sitzes 1 um die erste Drehachse 12 kann somit durch eine seitliche Schwenkbewegung des Sitzes überlagert werden. Dies bedeutet, dass beispielsweise das hintere linke Ende der Sitzfläche 10 weiter nach unten geneigt ist als das rechte hintere Ende. Durch die Verbindung von Sitzfläche 10 und Rückenlehne 11 folgt somit auch die Rückenlehne 11 einer solchen seitlichen Bewegung. Der Benutzer erfährt dadurch auch bei einer seitlichen Schwenkbewegung nach hinten eine angenehme Unterstützung durch die Rückenlehne.The seat 1 is thus clamped in the region of the bolt 5 in its front region and by the two ball joints 23, 24 in its rear region in the seat mechanism. Due to the rigid support arms 21, 22 is a rotational movement of the seat 1 about the second axis of rotation 13 thus possible only in conjunction with a simultaneous pivotal movement of the seat about the first axis of rotation 12. The pivoting movement of the seat 1 about the first axis of rotation 12 can thus be superimposed by a lateral pivoting movement of the seat. This means that, for example, the rear left end of the seat 10 is inclined further down than the right rear end. By the connection of seat 10 and backrest 11 thus follows also the backrest 11 such a lateral movement. The user experiences thereby also in a lateral pivoting movement to the rear of a pleasant support through the backrest.

Um insbesondere auch in der aufrechten Stellung des Stuhles eine ausreichende seitliche Stabilität zu gewährleisten stützt sich der Sitz 1 in seinem vorderen Bereich über zwei Gleitlager 6, 7 an der Sitzmechanik 2 bzw. dem Basisträger 3 ab. Im dargestellten Ausführungsbeispiel ist jeweils ein Gleitlager 6, 7 seitlich des Bolzens 13 zwischen dem Basisträger 3 und dem Sitz 1 vorgesehen (siehe Fig. 1c und 1e).In order to ensure a sufficient lateral stability especially in the upright position of the chair, the seat 1 is supported in its front region via two plain bearings 6, 7 on the seat mechanism 2 and the base support 3 from. In the illustrated embodiment, a respective sliding bearing 6, 7 is provided laterally of the bolt 13 between the base support 3 and the seat 1 (see Fig. 1c and 1e ).

Die Fig. 3a-3c zeigen die Situation, bei der die rechte Seite des Sitzes 1 unabhängig von der linken Seite des Sitzes eine seitliche Schwenkbewegung ausführt. Dabei kommt es zwischen dem Sitz 1 und den Gleitlagern 6, 7 zu einer Relativbewegung, wie dies insbesondere aus Fig. 3c ersichtlich ist. Um diese Bewegung ausführen zu können, weist der Sitz eine entsprechende Verwindungsfähigkeit auf.The Fig. 3a-3c show the situation in which the right side of the seat 1, regardless of the left side of the seat performs a lateral pivoting movement. It comes between the seat 1 and the plain bearings 6, 7 to a relative movement, like this particular out Fig. 3c is apparent. To perform this movement, the seat has a corresponding twisting ability.

Durch die definierte Einspannung des Sitzes 1 zwischen den Fixpunkten (Bolzen 5 und Kugelgelenken 23, 24) lässt sich ein exaktes Synchronverhältnis von Sitzneigung zu Rückenlehnenneigung einstellen. Darüber hinaus kann der Stuhl nicht nur gerade nach hinten, sondern auch nach einer der beiden Seiten, geneigt werden. In jeder Stellung des Stuhles wirkt ein ausreichend starker Druck von der Rückenlehne 11 auf den Rücken des Benutzers, sodass sich dieser in jeder Stellung sicher gehalten fühlt.Due to the defined clamping of the seat 1 between the fixed points (bolt 5 and ball joints 23, 24), an exact ratio of synchronism of seat tilt to backrest tilt can be adjusted. In addition, the chair can be tilted not only straight to the rear, but also to one of the two sides. In each position of the chair, a sufficiently strong pressure from the backrest 11 acts on the user's back, so that it feels secure in any position.

Das Ausführungsbeispiel gemäß den Fig. 4a und 4b zeigt ebenfalls eine Stellung des Stuhles in einer seitlich geneigten Stellung (ähnlich der Fig. 3a bis 3c). Hier wirken die Tragarme 21', 22' aber mit einem als Spiralfeder ausgebildeten Federelement 26 zusammen. Die Tragarme 21', 22' sind in der vorderen Hälfte derart zueinander gekröpft ausgebildet, dass die beiden Tragarme in diesem Bereich parallel zueinander und mit relativ geringem Abstand voneinander angeordnet sind. Unter diesem Bereich ist das Federelement 26 angeordnet, das sich mit einem Ende an einem Widerlager 3a am Basisträger abstützt und mit seinem anderen Ende mit beiden Tragarmen 21', 22' in Kontakt steht, wobei die Tragarme das Federelement 26 gemeinsam, aber auch unabhängig voneinander bei einer Drehung um die Schwenkachse 25 eindrücken können. Im Rahmen der Erfindung könnte natürlich auch jedem Schwenkarm jeweils ein Federelement zugeordnet sein.The embodiment according to the Fig. 4a and 4b also shows a position of the chair in a laterally inclined position (similar to the Fig. 3a to 3c ). Here, however, the support arms 21 ', 22' cooperate with a spring element 26 configured as a spiral spring. The support arms 21 ', 22' are in the front half so cranked to each other that the two support arms are arranged in this area parallel to each other and with a relatively small distance from each other. Under this area, the spring element 26 is arranged, which is supported at one end to an abutment 3a on the base support and with its other end with two support arms 21 ', 22' in contact, wherein the support arms, the spring element 26 together, but also independently can press in a rotation about the pivot axis 25. In the context of the invention, of course, each swivel arm could be assigned in each case a spring element.

Claims (9)

  1. Chair having a seat (1) and a seat mechanism (2), the seat being coupled to the seat mechanism in such a manner that the seat is, in a front end region (1a), pivotably supported about a first axis of rotation (12) which is orientated parallel with the axis of a user's knees,
    characterised in that
    the seat (1) is, in its front end region (1a), additionally supported on the seat mechanism (2) so as to be rotatable about a second axis of rotation (13) orientated perpendicularly to the first axis of rotation (12) and
    the seat mechanism (2) permits a lateral pivoting movement of the seat (1), the seat (1) and the seat mechanism (2) being in such a form that one side of the seat (1) is movable independently of the other side of the seat (1) during the lateral pivoting movement of the seat (1).
  2. Chair according to claim 1, characterised in that the seat (1) and the seat mechanism (2) are in such a form that the seat rotates about the second axis of rotation during the lateral pivoting movement of the seat.
  3. Chair according to claim 1, characterised in that the seat mechanism (2) has two lateral support arms (21, 22; 21', 22') which react independently of each other and to which the seat (1) is coupled in a rear region (1b).
  4. Chair according to claim 3, characterised in that the two support arms (21, 22; 21', 22') are pivotable about a pivot axis (25) which is orientated parallel with the first axis of rotation (12) and which is arranged below the front end region (1a) of the seat (1).
  5. Chair according to claim 4, characterised in that the distance (a) between the first axis of rotation (12) and the pivot axis (25) is from 2 to 8 cm, preferably from 3 to 5 cm.
  6. Chair according to claim 3, characterised in that the seat (1) comprises a seating face (10) and a backrest (11), the support arms (21, 22) being coupled to the seat (1) in a lower region of the backrest (11).
  7. Chair according to claims 4 and 6, characterised in that the synchronous ratio of the seat inclination to the backrest inclination is determined, on the one hand, by the distance between the pivot axis (25) of the support arms (21, 22; 21', 22') and the coupling between the support arm (21, 22; 21', 22') and the backrest (11) and, on the other hand, by the distance (a) of the pivot axis (25) of the support arms (21, 22; 21', 22') from the first axis of rotation of the seat (1).
  8. Chair according to claim 1, characterised in that the second axis of rotation (13) is formed so as to be fixed in position on the seat mechanism (2).
  9. Chair according to claim 1, characterised in that the front end region of the seat (1a) is supported on the seat mechanism (2) by way of at least one plain bearing (6, 7) provided between the seat (1) and the seat mechanism (2).
EP12155797.9A 2011-04-05 2012-02-16 Chair Active EP2508102B1 (en)

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CN103732441B (en) * 2011-08-10 2016-02-10 丰田自动车株式会社 Device for vehicle seat
DE102012107778B4 (en) * 2012-08-23 2018-08-16 Haworth Gmbh Chair, especially office chair

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016059031A1 (en) 2014-10-13 2016-04-21 Haworth Gmbh Chair, in particular office chair
DE102014220695A1 (en) 2014-10-13 2016-04-28 Haworth Gmbh Chair, especially office chair

Also Published As

Publication number Publication date
JP2012217845A (en) 2012-11-12
US20120256458A1 (en) 2012-10-11
EP2508102A1 (en) 2012-10-10
US9504330B2 (en) 2016-11-29
DE102011001811A1 (en) 2012-10-11
DE102011001811A8 (en) 2013-03-07
JP5726798B2 (en) 2015-06-03

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