EP3206536B1 - Lumbar support for a chair, and chair having same - Google Patents

Lumbar support for a chair, and chair having same Download PDF

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Publication number
EP3206536B1
EP3206536B1 EP15784306.1A EP15784306A EP3206536B1 EP 3206536 B1 EP3206536 B1 EP 3206536B1 EP 15784306 A EP15784306 A EP 15784306A EP 3206536 B1 EP3206536 B1 EP 3206536B1
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EP
European Patent Office
Prior art keywords
backrest
chair
support
lumbar support
lumbar
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EP15784306.1A
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German (de)
French (fr)
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EP3206536A1 (en
Inventor
Simon Desanta
Mark Wiese
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Haworth GmbH
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Haworth GmbH
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • 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
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A47C7/462—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means

Definitions

  • the invention relates to a lumbar support for a chair with a backrest which has backrest supports which can be pivoted independently of one another, the effect of individual support areas of the lumbar support being individually adjustable.
  • the invention also relates to a chair which has such a lumbar support.
  • lumbar supports in order to support the hip area or lumbar area of a seated person.
  • Known lumbar supports are usually designed to be depth-adjustable, that is, the position of the lumbar support is adjusted at right angles to the backrest area and thus an adjustment towards or away from the back of the seated person.
  • lumbar supports are perceived by many users as uncomfortable.
  • the lumbar support shown can only be used for chairs with rigid backrest frames, since it is arranged in the center of the backrest frame and therefore no adjustment of the lumbar support position to mutually independent pivoting of the backrest support of the chair is possible.
  • the lumbar support according to the invention enables, on the one hand, an individual, in particular asymmetrical, adjustment of the support effect directed at the hip area or the lumbar area of a seated person by the lumbar support.
  • the structural design of the lumbar support according to the invention allows it to be used with a chair, the back of which has backrest supports that can be pivoted independently of one another. Due to the articulated connection of the lumbar support with the independently pivotable backrest supports of the chair, the position of the Lumbar support within the backrest can easily be adapted to the current tilting of the backrest supports to one another.
  • leaf springs as spring elements enables particularly simple mounting of the support areas and also a very simple adjustment of the desired resistance of the individual support areas.
  • the adjustable bearing element in particular the point of curvature of the leaf spring can be adapted as required, so that the spring force acting on the lumbar area of the seated person by means of the support areas can be continuously adjusted to the needs of the user.
  • the lever mechanism and the transmission which is operatively connected to the lever mechanism, enable the support areas to move relative to the carrier. This enables, in particular, a height adjustment of the support areas when the lumbar support is connected to the backrest supports of a chair.
  • the spring force acting on the lumbar area of the seated person by means of the support areas can be adapted to the individual needs of the seated person.
  • the support area 10a is responsible for supporting the lumbar area to the left of the spinal column of a seated person
  • the support area 10b is responsible for the lumbar area to the right of the spine of a seated person.
  • a uniform support effect by the two support areas 10a, 10b on the lumbar region is perceived as unpleasant by many people, so that an asymmetrical setting of the support effect of the lumbar support adapted to the individual needs of the seated person is advantageous.
  • the support effect of the individual support areas 10a, 10b can be individually adjusted to the needs of a seated person.
  • the articulated mounting of the lumbar support 1 in the backrest supports 7 enables the lumbar support to move in a forward-backward direction relative to the chair as well as in an up-and-down direction relative to the chair. Due to the articulated mounting, the lumbar support 1 can follow every movement of the backrest supports 7, which can be pivoted independently of one another, so that the support areas 10a, 10b are each ideally adapted to the sitting position of a user of the chair. The hip area or lumbar area of a seated person can thus be supported as required in any possible position of the backrest formed from the backrest supports 7 which can be pivoted independently of one another.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Description

Die Erfindung betrifft eine Lordosenstütze für einen Stuhl mit einer Lehne, die unabhängig voneinander verschwenkbare Lehnenträger aufweist, wobei die Wirkung einzelner Stützbereiche der Lordosenstütze individuell einstellbar ist. Ferner betrifft die Erfindung einen Stuhl, der eine solche Lordosenstütze aufweist.The invention relates to a lumbar support for a chair with a backrest which has backrest supports which can be pivoted independently of one another, the effect of individual support areas of the lumbar support being individually adjustable. The invention also relates to a chair which has such a lumbar support.

Stühle mit einer Lehne, die unabhängig voneinander verschwenkbare Lehnenträger aufweist, sind beispielsweise aus der WO 2014/029696 A1 bekannt. Solche Stühle können sich auf einseitig gegen die Rückenlehne wirkende Kräfte einstellen, welche bei der Benutzung von Stühlen häufig auftreten. Die Anpassung des Stuhls an eine seitlich veränderte Körperhaltung des Benutzers erhöht den Sitzkomfort für diesen.Chairs with a backrest that has independently pivotable backrest supports are, for example, from the WO 2014/029696 A1 known. Such chairs can adjust to forces acting on one side against the backrest, which often occur when chairs are used. The adaptation of the chair to a laterally changed posture of the user increases the seating comfort for them.

Weiterhin ist es aus dem Stand der Technik bekannt, die Rückenlehne von Stühlen mit sogenannten Lordosenstützen zu versehen, um den Hüftbereich bzw. Lumbalbereich einer sitzenden Person abzustützen. Bekannte Lordosenstützen sind dabei üblicherweise tiefenverstellbar ausgestaltet, das heißt es erfolgt eine Verstellung der Lordosenstützenposition rechtwinklig zum Rückenlehnenbereich und somit eine Verstellung auf den Rücken der sitzenden Person zu oder davon weg. Solche Lordosenstützen werden jedoch von vielen Benutzern als unbequem wahrgenommen.It is also known from the prior art to provide the backrests of chairs with so-called lumbar supports in order to support the hip area or lumbar area of a seated person. Known lumbar supports are usually designed to be depth-adjustable, that is, the position of the lumbar support is adjusted at right angles to the backrest area and thus an adjustment towards or away from the back of the seated person. However, such lumbar supports are perceived by many users as uncomfortable.

Ein anderer Ansatz für eine Lordosenstütze ist beispielsweise aus der WO 2006/094261 A2 bekannt, wobei eine Lordosenstütze mittig auf einem starren Rückenlehnenrahmen angeordnet ist und Stützbereiche auf Blattfederhälften angeordnet sind, um die auf den Lumbalbereich eines Benutzers ausgeübte Kraft unabhängig voneinander für jeden Stützbereich einzustellen. Dafür sind weiterhin Trägerblöcke vorgesehen, die für eine jede Federhälfte unabhängig voneinander verschiebbar sind, um so die Federkraft der Federhälften und damit den Widerstand gegen Verschiebung der einzelnen Stützbereiche einzustellen.Another approach for a lumbar support is, for example, from the WO 2006/094261 A2 known, wherein a lumbar support is arranged centrally on a rigid backrest frame and support areas are arranged on leaf spring halves in order to adjust the force exerted on the lumbar area of a user independently of one another for each support area. For this purpose, support blocks are also provided, which can be displaced independently of one another for each spring half in order to adjust the spring force of the spring halves and thus the resistance to displacement of the individual support areas.

Die in der WO 2006/094261 A2 gezeigte Lordosenstütze ist jedoch nur für Stühle mit starren Rückenlehnenrahmen verwendbar, da sie mittig auf dem Rückenlehnenrahmen angeordnet ist und somit keine Anpassung der Lordosenstützenposition an voneinander unabhängige Verschwenkungen der Träger der Rückenlehne des Stuhls möglich ist.The one in the WO 2006/094261 A2 However, the lumbar support shown can only be used for chairs with rigid backrest frames, since it is arranged in the center of the backrest frame and therefore no adjustment of the lumbar support position to mutually independent pivoting of the backrest support of the chair is possible.

JP H02 84549 U zeigt eine in Tiefenrichtung verstellbare Lordosenstütze, bei der Lordosenstützbereiche um einen Drehpunkt verschwenkt werden, um diese nach vorne bzw. hinten relativ zu einer sitzenden Person zu verstellen. JP H02 84549 U shows a lumbar support adjustable in the depth direction, in which the lumbar support areas are pivoted about a pivot point in order to adjust them forwards or backwards relative to a seated person.

Es ist daher Aufgabe der Erfindung, eine Lordosenstütze vorzusehen, welche für einen Stuhl mit einer Lehne, die unabhängig voneinander verschwenkbare Lehnenträger aufweist, geeignet ist. Es ist weiterhin Aufgabe der Erfindung, einen Stuhl vorzusehen, der sich auf einseitig gegen die Rückenlehne wirkende Kräfte einstellen kann und zum anderen den Hüftbereich bzw. Lumbalbereich einer auf dem Stuhl sitzenden Person abstützen kann.It is therefore the object of the invention to provide a lumbar support which is suitable for a chair with a backrest which has backrest supports which can be pivoted independently of one another. It is a further object of the invention to provide a chair that can adjust to forces acting on one side against the backrest and, on the other hand, can support the hip area or lumbar area of a person sitting on the chair.

Die Aufgabe wird gemäß einem ersten Aspekt durch eine Lordosenstütze mit den Merkmalen des Anspruchs 1 gelöst.According to a first aspect, the object is achieved by a lumbar support with the features of claim 1.

Die erfindungsgemäße Lordosenstütze ermöglicht zum einen eine individuelle, insbesondere asymmetrische, Einstellung der auf den Hüftbereich bzw. den Lumbalbereich einer sitzenden Person gerichteten Stützwirkung durch die Lordosenstütze. Zum anderen erlaubt der konstruktive Aufbau der erfindungsgemäßen Lordosenstütze eine Verwendung derselben mit einem Stuhl, dessen Lehne unabhängig voneinander verschwenkbare Lehnenträger aufweist. Durch die gelenkige Verbindung der Lordosenstütze mit den unabhängig voneinander verschwenkbaren Lehnenträgern des Stuhls kann die Position der Lordosenstütze innerhalb der Lehne einfach an die momentane Verkippung der Lehnenträger zueinander angepasst werden. Durch die Unterstützung des Hüftbereichs bzw. Lumbalbereichs einer sitzenden Person, insbesondere auch bei einer Sitzhaltung, die lediglich einseitig eine Kraft auf die Rückenlehne des Stuhls ausübt, kann der Sitzkomfort für einen Benutzer erhöht werden. Im Weiteren kann die Unterstützungswirkung für die einzelnen Stützbereiche der Lordosenstütze individuell angepasst werden, sodass die persönlichen Vorlieben bzw. Bedürfnisse eines Benutzers des Stuhls befriedigt werden können. Dadurch kann der Sitzkomfort eines Benutzers weiter gesteigert werden.The lumbar support according to the invention enables, on the one hand, an individual, in particular asymmetrical, adjustment of the support effect directed at the hip area or the lumbar area of a seated person by the lumbar support. On the other hand, the structural design of the lumbar support according to the invention allows it to be used with a chair, the back of which has backrest supports that can be pivoted independently of one another. Due to the articulated connection of the lumbar support with the independently pivotable backrest supports of the chair, the position of the Lumbar support within the backrest can easily be adapted to the current tilting of the backrest supports to one another. By supporting the hip area or lumbar area of a seated person, in particular also in a sitting posture that only exerts a force on the backrest of the chair on one side, the seating comfort for a user can be increased become. Furthermore, the support effect for the individual support areas of the lumbar support can be individually adapted so that the personal preferences or needs of a user of the chair can be satisfied. As a result, the seating comfort of a user can be increased further.

In einer vorteilhaften Ausführungsform umfasst das Federelement eine Blattfeder. Insbesondere kann die Federwirkung über ein entlang einer Längsachse der Blattfeder bewegbares Lagerelement eingestellt werden. Bevorzugt wird das Lagerelement über einen Gewindemechanismus entlang der Längsachse der Blattfeder bewegt.In an advantageous embodiment, the spring element comprises a leaf spring. In particular, the spring action can be adjusted via a bearing element that can be moved along a longitudinal axis of the leaf spring. The bearing element is preferably moved along the longitudinal axis of the leaf spring via a thread mechanism.

Durch die Verwendung von Blattfedern als Federelemente ist eine besonders einfache Lagerung der Stützbereiche und auch eine sehr einfache Anpassung des gewünschten Widerstands der einzelnen Stützbereiche möglich. Mittels des einstellbaren Lagerelements kann insbesondere der Krümmungspunkt der Blattfeder bedarfsgerecht angepasst werden, sodass die mittels der Stützbereiche auf den Lumbalbereich der sitzenden Person wirkende Federkraft stufenlos auf die Bedürfnisse des Benutzers eingestellt werden kann. Es ist dabei insbesondere möglich einzelne Stützbereiche unabhängig voneinander einzustellen, sodass beispielsweise eine asymmetrische Unterstützungswirkung auf den Lumbalbereich einer sitzenden Person bezogen auf die beiden seitlichen Enden der Rückenlehne eines Stuhls möglich ist.The use of leaf springs as spring elements enables particularly simple mounting of the support areas and also a very simple adjustment of the desired resistance of the individual support areas. By means of the adjustable bearing element, in particular the point of curvature of the leaf spring can be adapted as required, so that the spring force acting on the lumbar area of the seated person by means of the support areas can be continuously adjusted to the needs of the user. In particular, it is possible to set individual support areas independently of one another so that, for example, an asymmetrical support effect on the lumbar area of a seated person is possible in relation to the two lateral ends of the backrest of a chair.

Erfindungsgemäß sind die Stützbereiche jeweils mittels eines Hebelmechanismuses auf dem zugehörigen Federelement gelagert. Erfindungsgemäß sind die Stützbereiche synchron über ein mit dem jeweiligen Hebelmechanismus wirkverbundenes Getriebe relativ zu dem Träger bewegbar. Die Stützbereiche sind dabei bevorzugt derart gebildet, dass sie in Führungen in den unabhängig voneinander verschwenkbaren Lehnenträgern eingreifen können.According to the invention, the support areas are each mounted on the associated spring element by means of a lever mechanism. According to the invention, the support areas can be moved synchronously relative to the carrier via a transmission that is operatively connected to the respective lever mechanism. The support areas are preferably formed in such a way that they can engage in guides in the backrest supports which can be pivoted independently of one another.

Der Hebelmechanismus und das mit dem Hebelmechanismus wirkverbundene Getriebe ermöglichen eine Bewegung der Stützbereiche relativ zu dem Träger. Dies ermöglicht insbesondere eine Höhenverstellung der Stützbereiche, wenn die Lordosenstütze mit den Lehnenträgern eines Stuhls verbunden ist. Somit kann die mittels der Stützbereiche auf den Lumbalbereich der sitzenden Person wirkende Federkraft auf die individuellen Bedürfnisse der sitzenden Person angepasst werden.The lever mechanism and the transmission, which is operatively connected to the lever mechanism, enable the support areas to move relative to the carrier. This enables, in particular, a height adjustment of the support areas when the lumbar support is connected to the backrest supports of a chair. Thus, the spring force acting on the lumbar area of the seated person by means of the support areas can be adapted to the individual needs of the seated person.

Gemäß einem zweiten Aspekt der Erfindung ist ein Stuhl mit einer Lehne, die unabhängig voneinander verschwenkbare Lehnenträger aufweist, vorgesehen, wobei eine erfindungsgemäße Lordosenstütze mit den unabhängig voneinander verschwenkbaren Lehnenträgern gelenkig verbunden ist. Bevorzugt weisen die Lehnenträger jeweils Führungen für die Stützbereiche der Lordosenstütze auf.According to a second aspect of the invention, a chair is provided with a backrest which has backrest supports which can be pivoted independently of one another, a lumbar support according to the invention being articulated to the backrest supports which can be pivoted independently of one another. The backrest supports preferably each have guides for the support areas of the lumbar support.

Der erfindungsgemäße Stuhl erlaubt einen erhöhten Sitzkomfort für einen Benutzer, da er sich durch die unabhängig voneinander verschwenkbaren Lehnenträger zum einen an einseitig auf die Rückenlehne einwirkende Kräfte anpassen kann. Zum anderen wird die Position der Lordosenstütze durch die gelenkige Lagerung an den unabhängig voneinander verschwenkbaren Lehnenträgern an die momentane Stellung bzw. Verkippung der Rückenlehne des Stuhls angepasst. Durch diese Anpassung kann eine in jeder Stellung bzw. Verkippung der Rückenlehne bedarfsgerechte Unterstützung des Hüftbereichs bzw. Lumbalbereichs einer sitzenden Person erzielt werden, sodass für die sitzende Person ein besonders komfortables Sitzen möglich ist.The chair according to the invention allows a user to sit more comfortably, since he can adapt to forces acting on one side of the backrest due to the backrest supports which can be pivoted independently of one another. On the other hand, the position of the lumbar support is adapted to the current position or tilting of the backrest of the chair due to the articulated mounting on the backrest supports which can be pivoted independently of one another. This adaptation enables the hip area or lumbar area of a seated person to be supported as required in any position or tilting of the backrest, so that particularly comfortable sitting is possible for the seated person.

Nachfolgend werden konkrete Ausführungsformen der Erfindung unter Bezugnahme auf die Zeichnungen näher erläutert. Gleiche oder gleichwirkende Elemente sind dabei mit demselben Bezugszeichen gekennzeichnet.Specific embodiments of the invention are explained in more detail below with reference to the drawings. Identical or identically acting elements are identified with the same reference symbols.

Es zeigen:

Fig. 1
eine schematische Rückansicht der erfindungsgemäßen Lordosenstütze in einer oberen Stellung;
Fig. 2
eine schematische Rückansicht der erfindungsgemäßen Lordosenstütze in einer mittleren Stellung;
Fig. 3
eine schematische Rückansicht der erfindungsgemäßen Lordosenstütze in einer unteren Stellung;
Fig. 4
eine Schnittansicht der erfindungsgemäßen Lordosenstütze entlang der Line A-A in Fig. 2;
Fig. 5
eine schematische Draufsicht des erfindungsgemäßen Stuhls;
Fig. 6
eine schematische Draufsicht des erfindungsgemäßen Stuhl in einer einseitig geneigten Stellung der Lehne; und
Fig. 7
eine schematische Seitenansicht des erfindungsgemäßen Stuhls in einer einseitig geneigten Stellung der Lehne.
Show it:
Fig. 1
a schematic rear view of the lumbar support according to the invention in an upper position;
Fig. 2
a schematic rear view of the lumbar support according to the invention in a middle position;
Fig. 3
a schematic rear view of the lumbar support according to the invention in a lower position;
Fig. 4
a sectional view of the lumbar support according to the invention along the line AA in Fig. 2 ;
Fig. 5
a schematic plan view of the chair according to the invention;
Fig. 6
a schematic plan view of the chair according to the invention in a unilaterally inclined position of the backrest; and
Fig. 7
a schematic side view of the chair according to the invention in a unilaterally inclined position of the backrest.

Die in der Figur 4 gezeigte Lordosenstütze 1 weist zwei Stützbereiche 10a, 10b auf, die jeweils über einen Hebel 6a und ein Koppelglied 6b auf einem als Blattfeder ausgeführten Federelement 2 gelagert sind. Das Federelement 2 ist wiederum auf einem Träger 5 angeordnet, mit welchem auch die beiden Stützbereiche 10a, 10b verbunden sind. Die Ausgestaltung der einzelnen Stützbereiche 10a, 10b ist aus dem Stand der Technik bekannt und soll im Folgenden nicht näher diskutiert werden.The one in the Figure 4 The lumbar support 1 shown has two support areas 10a, 10b which are each mounted on a spring element 2 designed as a leaf spring via a lever 6a and a coupling member 6b. The spring element 2 is in turn arranged on a carrier 5 to which the two support areas 10a, 10b are also connected. The design of the individual support areas 10a, 10b is known from the prior art and will not be discussed in more detail below.

Auf jeder der Blattfedern 2 ist jeweils ein bewegbares Lagerelement 3 angeordnet, welches entlang einer Längsachse der Blattfeder 2 bewegbar ist. In der gezeigten Ausführungsform wird die Position des Lagerelements entlang der Längsachse der Blattfeder 2 über eine Steilgewindespindel 4 eingestellt. Allgemein kann die Position des Lagerelements 3 über einen jeden beliebigen Gewindemechanismus eingestellt werden. Die Steilgewindespindel 4 ist über ein Bedienelement 8 bequem durch einen Benutzer bedienbar. Das Bedienelement kann beispielsweise als Drehknauf ausgebildet sein.A movable bearing element 3, which can be moved along a longitudinal axis of the leaf spring 2, is arranged on each of the leaf springs 2. In the embodiment shown, the position of the bearing element along the longitudinal axis of the leaf spring 2 is set via a high-helix thread spindle 4. In general, the position of the bearing element 3 can be adjusted via any desired threaded mechanism. The high-helix thread spindle 4 can be conveniently operated by a user via an operating element 8. The operating element can for example be designed as a rotary knob.

Wirkt nun beispielsweise eine Kraft auf den Stützbereich 10a, so wird diese auf die Blattfeder 2, auf welcher der Stützbereich 10a gelagert ist, übertragen. Aufgrund der Krafteinwirkung wird die Blattfeder an der Position des Lagerelements 3 gekrümmt und der Lumbalbereich, der die Kraft auf den Stützbereich 10a ausübt, wird durch diesen gestützt. Durch das Verfahren des Lagerelements 3 entlang der Blattfeder 2 kann der Krümmungspunkt entlang der Längsachse der Blattfeder 2 verschoben werden, sodass die Federwirkung der Blattfeder 2 stufenlos einstellbar ist. Somit kann die auf den Lumbalbereich einer sitzenden Person einwirkende Kraft entsprechend deren Wünschen bzw. Vorlieben eingestellt werden, wobei keine Verstellung in Tiefenrichtung, d. h. in Richtung der Flächennormalen der Sitzlehne erfolgt. Bei der in der Figur 4 gezeigten Lordosenstütze 1 ist der Stützbereich 10a beispielsweise für die Unterstützung des links von der Wirbelsäule einer sitzenden Person befindlichen Lumbalbereichs verantwortlich und der Stützbereich 10b für den rechts von der Wirbelsäule einer sitzenden Person befindlichen Lumbalbereich. Eine gleichmäßige Unterstützungswirkung durch die beiden Stützbereiche 10a, 10b auf den Lumbalbereich wird von vielen Personen als unangenehm wahrgenommen, sodass eine auf die individuellen Bedürfnisse der sitzenden Person angepasste asymmetrische Einstellung der Unterstützungswirkung der Lordosenstütze vorteilhaft ist. Durch die über den Gewindemechanismus einstellbare Position des Lagerelements 3 entlang der Längsachse der Blattfeder 2 kann die Unterstützungswirkung der einzelnen Stützbereiche 10a, 10b individuell auf die Bedürfnisse einer sitzenden Person eingestellt werden.If, for example, a force now acts on the support area 10a, this is transmitted to the leaf spring 2 on which the support area 10a is mounted. Due to the action of force, the leaf spring is curved at the position of the bearing element 3 and the lumbar region, which exerts the force on the support region 10a, is supported by the latter. By moving the bearing element 3 along the leaf spring 2, the point of curvature can be shifted along the longitudinal axis of the leaf spring 2, so that the spring action of the leaf spring 2 is continuously adjustable. Thus, the force acting on the lumbar region of a seated person can be adjusted according to their wishes or preferences, with no adjustment in the depth direction, ie in the direction of the surface normal of the seat back. In the case of the Figure 4 The lumbar support 1 shown, for example, the support area 10a is responsible for supporting the lumbar area to the left of the spinal column of a seated person, and the support area 10b is responsible for the lumbar area to the right of the spine of a seated person. A uniform support effect by the two support areas 10a, 10b on the lumbar region is perceived as unpleasant by many people, so that an asymmetrical setting of the support effect of the lumbar support adapted to the individual needs of the seated person is advantageous. As a result of the position of the bearing element 3 along the longitudinal axis of the leaf spring 2 which can be adjusted via the thread mechanism, the support effect of the individual support areas 10a, 10b can be individually adjusted to the needs of a seated person.

Weiterhin zeigt die Figur 4 die Lagerung der Lordosenstütze 1 in den Lehnenträgern 7 eines Stuhls. Dabei sind Bereiche des Trägers 5 der Lordosenstütze 1, welche mit den Lehnenträgern 7 in Eingriff stehen, als Gelenkkopf 9a ausgebildet. Im Weiteren sind Bereiche der Lehnenträger 7, welche mit der Lordosenstütze 1 im Eingriff stehen, als Gelenkpfanne 9b ausgebildet, so dass eine gelenkige Verbindung zwischen Lordosenstütze 1 und Lehnenträgern 7 gegeben ist.Furthermore shows the Figure 4 the storage of the lumbar support 1 in the backrest supports 7 of a chair. Areas of the carrier 5 of the lumbar support 1 which are in engagement with the backrest carriers 7 are designed as joint heads 9a. Furthermore, areas of the backrest supports 7 which are in engagement with the lumbar support 1 are designed as joint sockets 9b, so that an articulated connection between the lumbar support 1 and the backrest supports 7 is provided.

Figur 4 zeigt weiterhin, dass die Stützbereiche 10a, 10b über Koppelglieder 6b und Hebel 6a auf den zugehörigen Federelementen 2 gelagert sind. Die Hebel 6a sind dabei mit einem Gleichlaufgetriebe 11 wirkverbunden, so dass eine synchrone Bewegung der Stützbereiche 10a, 10b über die Hebel 6a und Koppelglieder 6b relativ zum Träger 5 möglich ist. Figure 4 also shows that the support areas 10a, 10b are mounted on the associated spring elements 2 via coupling members 6b and levers 6a. The levers 6a are operatively connected to a synchronous transmission 11, so that a synchronous movement of the support areas 10a, 10b relative to the carrier 5 is possible via the levers 6a and coupling members 6b.

In der Figur 1 ist eine obere Stellung der Stützbereiche 10a, 10b bezogen auf den Träger 5 der Lordosenstütze 1 gezeigt. Die Figur 2 zeigt eine mittlere Stellung der Stützbereiche 10a, 10b und die Figur 3 eine untere Stellung der Stützbereiche 10a, 10b bezogen auf den Träger 5. In den Figuren 1 bis 3 ist die Lordosenstütze 1 jeweils mit Lehnenträgern 7 eines Stuhls verbunden. Wie aus den Figuren 1 bis 3 ersichtlich ist, kann durch die Bewegung der Stützbereiche 10a, 10b relativ zum Träger 5 der Lordosenstütze 1 eine Höhenverstellung der Stützbereiche 10a, 10b innerhalb der Rückenlehne eines Stuhls vorgenommen werden. Somit kann die Höhenposition der Stützbereiche 10a, 10b an die Bedürfnisse eines Benutzers des Stuhls angepasst werden. Durch die Verwendung des Gleichlaufgetriebes 11 führen die Hebel 6a bei einer Höhenverstellung der Stützbereiche 10a, 10b eine Bewegung entlang einer Kreisbahn durch. Wie insbesondere aus der Figur 4 ersichtlich ist, sind die Stützbereiche 10a, 10b in Führungen F der Lehnenträger 7 geführt, so dass die Stützbereiche 10a, 10b bei einer Höhenverstellung eine Linearbewegung ausführen. Um einen Ausgleich zwischen der Kreisbewegung der Hebel 6a und der Linearbewegung der Stützbereiche 10a, 10b zu schaffen, sind Koppelglieder 6b vorgesehen. Mit der vorgehend beschriebenen Konstruktion ist eine einfache, synchrone Höhenverstellung der Stützbereiche 10a, 10b möglich.In the Figure 1 an upper position of the support areas 10a, 10b in relation to the carrier 5 of the lumbar support 1 is shown. The Figure 2 shows a middle position of the support areas 10a, 10b and FIG Figure 3 a lower position of the support areas 10a, 10b based on the carrier 5. In the Figures 1 to 3 the lumbar support 1 is connected to backrest supports 7 of a chair. As from the Figures 1 to 3 As can be seen, the movement of the support areas 10a, 10b relative to the carrier 5 of the lumbar support 1 can be used to adjust the height of the support areas 10a, 10b within the backrest of a chair. The height position of the support areas 10a, 10b can thus be adapted to the needs of a user of the chair. By using the synchronous gear 11, the levers 6a move along a circular path when the support areas 10a, 10b are adjusted in height. As in particular from the Figure 4 can be seen are the support areas 10a, 10b are guided in guides F of the backrest supports 7, so that the support areas 10a, 10b perform a linear movement when the height is adjusted. In order to compensate for the circular movement of the levers 6a and the linear movement of the support areas 10a, 10b, coupling members 6b are provided. With the construction described above, a simple, synchronous height adjustment of the support areas 10a, 10b is possible.

Die Figur 5 zeigt einen erfindungsgemäßen Stuhl mit unabhängig voneinander verschwenkbaren Lehnenträgern 7, die mittels einer Strebe 12 an einem Ende verbunden sind. Die Lehnenträger 7 sind an ihrem anderen Ende mit einem Verschwenkmechanismus des Stuhls verbunden. Weiterhin umfasst der Stuhl die vorgehend beschriebene Lordosenstütze 1, welche, wie in der Figur 4 gezeigt, in den Lehnenträgern 7 gelenkig gelagert ist.The Figure 5 shows a chair according to the invention with backrest supports 7 which can be pivoted independently of one another and which are connected at one end by means of a strut 12. The backrest supports 7 are connected at their other end to a pivoting mechanism of the chair. Furthermore, the chair comprises the previously described lumbar support 1, which, as in FIG Figure 4 shown, is articulated in the backrest supports 7.

Die Figur 6 zeigt den erfindungsgemäßen Stuhl in einer einseitig gengeigten Stellung der aus den unabhängig voneinander verschwenkbaren Lehnenträgern 7 gebildeten Lehne. Aufgrund der gelenkigen Lagerung der Lordosenstütze 1 in den beiden Lehnenträgern 7 kann die Orientierung der Lordosenstütze 1 an die einseitig geneigte Stellung der Lehne des Stuhls angepasst werden, so dass auch in dieser Stellung der Lehne eine bedarfsgerechte Unterstützung des Lumbalbereichs einer sitzenden Person durch die Stützbereiche 10a, 10b möglich ist.The Figure 6 shows the chair according to the invention in a unilaterally inclined position of the backrest formed from the backrest supports 7, which can be pivoted independently of one another. Due to the articulated mounting of the lumbar support 1 in the two backrest supports 7, the orientation of the lumbar support 1 can be adapted to the unilaterally inclined position of the backrest of the chair, so that in this position of the backrest, too, the lumbar region of a seated person can be supported as required by the support areas 10a , 10b is possible.

Wie aus der Figur 7 ersichtlich ist, ist durch die gelenkige Lagerung der Lordosenstütze 1 in den Lehnenträgern 7 zum einen eine Bewegung der Lordosenstütze entlang einer vorwärts-rückwärts Richtung bezogen auf den Stuhl als auch in einer oben-unten Richtung bezogen auf den Stuhl möglich. Aufgrund der gelenkigen Lagerung kann die Lordosenstütze 1 einer jeden Bewegung der unabhängig voneinander verschwenkbaren Lehnenträger 7 folgen, so dass die Stützbereiche 10a, 10b jeweils ideal an die Sitzposition eines Benutzers des Stuhls angepasst sind. Der Hüftbereich bzw. Lumbalbereich einer sitzenden Person kann somit in einer jeden möglichen Stellung der aus den unabhängig voneinander verschwenkbaren Lehenträgern 7 gebildeten Lehne bedarfsgerecht gestützt werden.As from the Figure 7 As can be seen, the articulated mounting of the lumbar support 1 in the backrest supports 7 enables the lumbar support to move in a forward-backward direction relative to the chair as well as in an up-and-down direction relative to the chair. Due to the articulated mounting, the lumbar support 1 can follow every movement of the backrest supports 7, which can be pivoted independently of one another, so that the support areas 10a, 10b are each ideally adapted to the sitting position of a user of the chair. The hip area or lumbar area of a seated person can thus be supported as required in any possible position of the backrest formed from the backrest supports 7 which can be pivoted independently of one another.

Aus Gründen der Übersichtlichkeit ist in den Figuren die Lehne des Stuhls nur mit den Lehnenträgern und der die Lehnenträger verbindenden Strebe dargestellt. Es ist jedoch selbstverständlich, dass eine geeignete Bespannung aus einem elastischen Material vorgesehen sein kann. Weiterhin ist aus Gründen der Übersichtlichkeit der Stuhl nur mit den Lehnenträgern und einem Teilbereich der Bodenplatte dargestellt. Auf weitergehende konstruktive Details der Lagerung der Lehnenträger wurde in der Beschreibung verzichtet.For the sake of clarity, the backrest of the chair is shown in the figures only with the backrest supports and the strut connecting the backrest supports. It it goes without saying, however, that a suitable covering made of an elastic material can be provided. Furthermore, for the sake of clarity, the chair is only shown with the backrest supports and a partial area of the base plate. Further structural details of the mounting of the backrest supports have been omitted in the description.

BezugszeichenlisteList of reference symbols

11
LordosenstützeLumbar support
22
FederelementSpring element
33
LagerelementBearing element
44th
GewindemechanismusThread mechanism
55
Trägercarrier
6a6a
Hebellever
6b6b
KoppelgliedCoupling link
77th
LehnenträgerBackrest
88th
BedienelementControl element
9a9a
GelenkkopfSwivel head
9b9b
GelenkpfanneSocket
10a10a
StützbereichSupport area
10b10b
StützbereichSupport area
1111
GleichlaufgetriebeSynchronous gear
1212th
Strebestrut
FF.
Führungguide

Claims (6)

  1. Lumbar support (1) for a chair having a backrest that has backrest carriers (7) that are pivotable independently of one another, wherein the lumbar support comprises:
    supporting regions (10a, 10b);
    spring elements (2), wherein the supporting regions (10a, 10b) are each spring-mounted on a separate spring element (2), wherein each spring element (2) has a spring action, wherein the spring action of each spring element (2) is settable individually; and
    a carrier (5), wherein each of the spring elements is arranged on the carrier (5), which is able to be hinged to the backrest carriers (7) that are pivotable independently of one another, wherein
    the supporting regions (10a, 10b) are each mounted on the associated spring element (2) by means of a lever mechanism (6a, 6b), characterized in that the supporting regions (10a, 10b) are movable synchronously relative to the carrier (5) via a gear mechanism (11) operatively connected to the respective lever mechanism (6a, 6b).
  2. Lumbar support according to Claim 1, wherein the spring elements (2) each comprise a leaf spring (2).
  3. Lumbar support according to Claim 2, wherein the bearing element is moved along the longitudinal axis of the leaf spring (2) via a threaded mechanism (4).
  4. Lumbar support according to one of the preceding claims, wherein the supporting regions (10a, 10b) are each formed such that they can engage in guides in the backrest carriers (7) that are pivotable independently of one another.
  5. Chair having a backrest that has backrest carriers (7) that are pivotable independently of one another, wherein a lumbar support (1) according to one of the preceding claims is connected in an articulated manner to the backrest carriers (7) that are pivotable independently of one another.
  6. Chair according to Claim 5, wherein the backrest carriers (7) each have guides for the supporting regions (10a, 10b).
EP15784306.1A 2014-10-13 2015-10-13 Lumbar support for a chair, and chair having same Active EP3206536B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014220693.6A DE102014220693A1 (en) 2014-10-13 2014-10-13 Lumbar support for a chair and chair with the same
PCT/EP2015/073637 WO2016059030A1 (en) 2014-10-13 2015-10-13 Lumbar support for a chair, and chair having same

Publications (2)

Publication Number Publication Date
EP3206536A1 EP3206536A1 (en) 2017-08-23
EP3206536B1 true EP3206536B1 (en) 2021-05-26

Family

ID=54345470

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15784306.1A Active EP3206536B1 (en) 2014-10-13 2015-10-13 Lumbar support for a chair, and chair having same

Country Status (4)

Country Link
US (1) US10045624B2 (en)
EP (1) EP3206536B1 (en)
DE (1) DE102014220693A1 (en)
WO (1) WO2016059030A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020126229B4 (en) 2020-10-07 2022-06-30 Bock 1 Gmbh & Co. Kg Operating device for adjusting a backrest of an office chair

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB360516A (en) * 1930-08-15 1931-11-12 Weymann S Motor Bodies 1925 Lt Improvements in or relating to seats
US2756809A (en) * 1954-06-30 1956-07-31 Endresen Ernst Back support for chairs, car seats, and the like
US3288525A (en) * 1965-05-17 1966-11-29 Donald B Cerf Orthopedic chair
JPH0284549A (en) 1988-07-15 1990-03-26 Agency Of Ind Science & Technol Modification of raw silk fiber by sericin fixing
JPH0729899Y2 (en) * 1988-12-19 1995-07-12 デルタ工業株式会社 Car seat
JP4987739B2 (en) 2005-03-01 2012-07-25 ハワース、インク． Chair and lumbar support pad for chair, lumbar support pad assembly
WO2011117918A1 (en) 2010-03-24 2011-09-29 タカノ株式会社 Lumbar support device for chair
DE102012107778B4 (en) 2012-08-23 2018-08-16 Haworth Gmbh Chair, especially office chair

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
US20180042385A9 (en) 2018-02-15
US20170231397A1 (en) 2017-08-17
DE102014220693A1 (en) 2016-04-14
WO2016059030A1 (en) 2016-04-21
US10045624B2 (en) 2018-08-14
EP3206536A1 (en) 2017-08-23

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