EP3714738A1 - Backrest assembly and seating furniture - Google Patents

Backrest assembly and seating furniture Download PDF

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Publication number
EP3714738A1
EP3714738A1 EP20157720.2A EP20157720A EP3714738A1 EP 3714738 A1 EP3714738 A1 EP 3714738A1 EP 20157720 A EP20157720 A EP 20157720A EP 3714738 A1 EP3714738 A1 EP 3714738A1
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EP
European Patent Office
Prior art keywords
backrest
adjusting
flap
rail
frame
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Granted
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EP20157720.2A
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German (de)
French (fr)
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EP3714738B1 (en
Inventor
Markus Berenwinkel
Peter Horn
Martin Potrykus
Armin Sander
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Koenig and Neurath AG
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Koenig and Neurath AG
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Publication of EP3714738A1 publication Critical patent/EP3714738A1/en
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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
    • A47C7/465—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 by pulling an elastic cable
    • 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 backrest arrangement for seating furniture.
  • the invention further relates to a piece of furniture, in particular an office chair, with a seat support for a seat part and with the protruding backrest arrangement.
  • Lordosis is understood to mean a natural curvature of the abdomen, in particular of the lumbar spine.
  • a lumbar support is an element on a piece of furniture that supports the lumbar spine of a person sitting on the piece of furniture. If you sit upright for a long time, the muscles of the lumbar spine can become fatigued.
  • the lumbar support helps to maintain the natural posture of the lordosis.
  • the lumbar support is expediently arranged in the area of the lordosis on a backrest frame of the backrest.
  • Such lumbar supports are therefore mainly used in seating furniture on which people often sit continuously for a long period of time. These are, for example, office chairs.
  • lumbar supports are often arranged on the backrest or on the backrest frame so as to be vertically (height) adjustable by means of an adjusting device.
  • lumbar supports are also often adjustable in the depth direction in order to enable them to be adapted to the individual curvature of the lordosis.
  • the invention is based on the object of specifying a particularly suitable backrest.
  • the flap is hinged from a backrest surface spanned by the frame supports so as to be hinged at a pivot point on the elongated adjusting rail.
  • the flap is therefore preferably adjustable in the sagittal direction in the intended installation state.
  • the flap is power transmission technology for folding out coupled to a traction mechanism arranged (ie, in particular, held) on the adjusting rail.
  • the sagittal plane is understood to be the plane of the backrest arrangement or of the chair which corresponds to the sagittal plane of a user of the chair in an intended seating position.
  • the sagittal plane runs perpendicular to the seat surface and to the surface of the backrest, and the sagittal direction therefore essentially parallel to the seat surface and perpendicular to the surface of the backrest.
  • the force application point for generating the actuating force required to adjust the flap can be easily selected - particularly with regard to the distance to the flap - advantageously without a number of components or a correspondingly larger number of components To have to accept power transmission elements (e.g. gears) increased installation space.
  • power transmission elements e.g. gears
  • the flap preferably has a cheek-like support (comparable to a "cheek" of a "winged armchair") for the backrest textile.
  • this jaw-like support In the area of this jaw-like support, the width of the flap extending transversely to the sagittal plane is at least doubled.
  • the flap is also preferably narrow in the area of this jaw in comparison to the width of the backrest surface spanned by the frame supports.
  • the lumbar support adjusting device can be kept as inconspicuous as possible even with a net used as a backrest textile.
  • the flap is also arched transversely to the longitudinal direction of the frame support in the area of this cheek, so that the backrest textile is displayed locally (ie in particular in a wave-like manner) as if over a hump.
  • a lumbar support adjusting device is preferably arranged on each of the two frame supports.
  • the setting link is preferably shaped in such a way that in a neutral position (also referred to as the zero position), in which the flap is not folded out, it is oriented obliquely in the direction of the guide link, so that the sliding block is comparable to a wedge when adjusted in the unfolding direction the guide link and the setting link is moved and thus leads to an increasing unfolding of the flap.
  • the above-described setting link of the flap has several (i.e. at least two) locking recesses for the sliding block.
  • the sliding block for setting discrete positioning positions can lie in these locking recesses.
  • haptic feedback is also made possible when the protrusion of the lumbar support is set - which results from the backrest fabric bulged by the lumbar support adjusting device.
  • the flap In its neutral position, the flap preferably rests on the adjusting rail over its entire length.
  • the flap preferably overlaps the adjusting rail transversely to the sagittal plane.
  • the flap here has a groove in which the adjusting link is formed and in which the adjusting rail rests in the neutral position.
  • an adjusting element for applying the adjusting force acting on the flap to the traction means is arranged on one of the two ends of the adjusting rail.
  • This adjusting element is preferably a rotary knob, a type of winged screw head or the like, which is set up and provided for the rotary drive of the traction mechanism. Because the adjusting element is arranged at one end of the adjusting rail, the adjusting element is also arranged at the greatest possible distance from the flap, in particular from the pivot point. This is advantageous in that the positioning of the adjusting element in the longitudinal direction on the frame support can be relocated to an area that can be reached comparatively comfortably by the user of the chair.
  • the area of the lordosis of the lumbar spine is usually located in an area of the back that most people cannot reach comfortably, but usually only by twisting the upper body and / or the arms.
  • the actuating element is preferably arranged at the end pointing in the direction of the floor in the intended installation state.
  • the pivot point which is preferably located approximately centrally between the two ends - and / or at least approximately 5 to 20 cm, preferably approximately 15 cm from the lower end - the adjusting element is in an area that is comparatively easy to reach with a normal sitting posture on the seating furniture the backrest arrangement, in particular the backrest formed by means of this on the seating furniture.
  • the adjusting element preferably serves not only to apply the adjusting force for unfolding (or also folding in) the flap, but also for adjusting, specifically shifting, the entire lumbar support adjusting device in Longitudinal direction of the respective frame support.
  • the user of the seating furniture grabs the adjusting element both to “adjust the height” of the lumbar support and to adjust the depth (ie to bulge out or in) the lumbar support.
  • the lumbar support adjusting device is guided displaceably with the adjusting rail in a guide rail of the frame support, preferably a groove formed in the frame support. More preferably, only the flap protrudes from the guide rail, so that the entire lumbar support can be designed to be particularly inconspicuous.
  • the traction means is formed by a string of pearls, i. H. a string with balls (the “pearls") fixedly (i.e. immovable) thereon in discrete positions.
  • the beads are used for the positive transmission of force from the adjusting element to the traction mechanism.
  • the sliding block is preferably also held in a form-fitting manner on the traction means by means of the beads.
  • the traction means is formed by a chain (for example a type of bicycle chain), a belt (for example a toothed belt, V-belt, etc.), a rope or the like.
  • the seating furniture according to the invention represents in particular an office chair.
  • the seating furniture comprises a seat support for a seat part, on which a seat cushion is preferably arranged. Furthermore, the seating furniture comprises the backrest arrangement described above.
  • the seating furniture consequently has the features of the backrest arrangement described above and also their advantages.
  • a backrest arrangement referred to for short as backrest 1, for a piece of furniture, specifically an office chair (not shown in detail) is shown.
  • the backrest 1 has a backrest frame 2 which, when installed as intended, comprises two frame supports 6, which are oriented parallel to the sagittal plane 4 of the chair, for stretching a backrest textile (not shown).
  • the backrest textile is a network.
  • the backrest 1 has two lumbar support adjusting devices 8, which are each arranged on one of the frame supports 6.
  • the lumbar support adjusting devices 8 are in the longitudinal direction 10 (which runs parallel to the sagittal plane 4) of the respective frame support 6 (or also of the back of the user of the Seating furniture) slidably mounted on this.
  • the lumbar support adjusting devices 8 are each received in a guide rail 12, formed by a groove, of the respective frame support 6, and are mounted displaceably.
  • the lumbar support adjusting devices 8 are set up and provided to form, together with the network, an adjustable lumbar support that is adjustable in the vertical direction (i.e. in the longitudinal direction 10) and in terms of its depth, ie in the sagittal direction (in Fig. 2 i.e. from the plane of the sheet) is adjustable.
  • the lumbar support adjusting devices 8 each have a flap 20 for reversible bulging of the network.
  • the lumbar support adjustment devices 8 have an elongated, in the assembled state (see FIG. Fig. 1 and 2 ) adjusting rail 22 aligned along the respective frame support 6.
  • the flap 20 is pivotably articulated at a pivot point 24 of the adjusting rail 22, so that the flap 20 can be folded out of a backrest surface spanned by the frame supports 6 (cf. Fig. 4 , 8th ).
  • the flap 20 is hinged approximately in the middle on the adjusting rail 22.
  • the flap 20 is coupled in terms of force transmission to a traction mechanism 26 arranged on the adjusting rail 22 (cf. Fig. 5 , 7th , 8th ).
  • the traction mechanism 26 has two deflection rollers 30 arranged at the two ends 28 of the adjusting rail 22.
  • the traction mechanism 26 has a string of pearls 32 as the traction mechanism.
  • the lower deflection roller 30 forms a drive roller for the string of pearls 32.
  • this deflection roller 30 is coupled to an adjusting element, specifically a rotary knob 34.
  • the lower deflection roller 30 is spaced from the pivot point 24 by about 15 cm.
  • the rotary knob 34 is arranged in a manner easily accessible to a user of the office chair in the area of a lower section 36 of the backrest 1.
  • the rotary knob 34 serves not only to actuate the traction mechanism 26 but also as a handle for moving the entire Lumbar support adjusting device 8 in the longitudinal direction 10.
  • the respective rotary knob 34 is accessible from an outside of the backrest 1.
  • a guide slot 38 is formed on the adjusting rail 22.
  • a sliding block 40 which is coupled to the string of pearls 32 in a form-fitting manner, slides on this guide link 38.
  • the setting gate 42 is shaped in such a way that it is in a neutral position (see Fig. Fig. 3 , 6th , 7th and 8th ), in which the flap 20 is not folded away from the adjusting rail 22, is oriented obliquely in the direction of the guide slot 38 (see FIG. Fig. 7 ).
  • locking recesses 44 for the sliding block 40 are formed in the setting link 42 (see FIG. Figures 7-9 ).
  • the sliding block 40 can lie in these locking recesses 44, whereby discrete setting positions are specified.
  • the flap 20 has on the one hand a seen in profile (cf. Fig. 4 and 6 to 9 ) hump-like geometry on which the network can rest. As a result, when the flap 20 is folded out, a comparatively locally limited bulging or protrusion of the network and thus a protrusion of the lumbar support formed thereby is achieved.
  • the flap 20 has a support 46 that is widened in the manner of a jaw (see Fig. Fig. 1 , 2 , 3 , 5 ). Nevertheless, the width of the flap 20 is also narrow in the area of this support 46 compared to the width of the backrest surface spanned by the frame girders 6 (cf. Fig. 1 , 2 ).
  • the setting link 42 of the flap 20 is also arranged in a groove 48 of the flap 20.
  • This groove 48 is dimensioned such that the flap 20 engages around the adjusting rail 22 on the outside at least in the neutral position (cf. Fig. 7 ).
  • the respective lumbar support adjusting device 8 is arranged in the associated guide rail 12 of the frame support 6 in such a way that mostly only the flap 20 can be seen on the outside.
  • a groove-like recess 50 running in the longitudinal direction 10 is incorporated into the setting slot 42, in which the string of pearls 32 can run when the flap 20 is not fully unfolded, whereas the sliding block 40 is on the actual sliding surface 52 of the setting slot 42, which is raised opposite the recess 50 rests.
  • the flap 20 can encompass the adjusting rail 22 particularly far.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Abstract

Die Erfindung betrifft eine Rückenlehnenanordnung (1) für ein Sitzmöbel, aufweisend einen Lehnenrahmen (2), der zwei im bestimmungsgemäßen Einbauzustand in Rückenlängsrichtung orientierte Rahmenträger (6) zum Aufspannen eines Lehnentextils aufweist, und eine Lordosenstützenstellvorrichtung (8), die an einem der Rahmenträger (6) in Längsrichtung (10) des jeweiligen Rahmenträgers (6) verschiebbar gelagert ist. Die Lordosenstützenstellvorrichtung (8) weist dabei eine Wölbklappe (20) zum reversiblen Auswölben des Lehnentextils sowie eine langgestreckte, entlang des Rahmenträgers (6) ausgerichtete Stellschiene (22) auf, wobei die Wölbklappe (20) aus einer von den Rahmenträgern (6) aufgespannten Lehnenfläche heraus klappbar in einem Schwenkpunkt (24) an der langgestreckten Stellschiene (22) angelenkt ist, und wobei die Wölbklappe (20) zum Ausklappen kraftübertragungstechnisch mit einem an der Stellschiene (22) angeordneten Zugmittelgetriebe (26) gekoppelt ist.The invention relates to a backrest arrangement (1) for seating furniture, having a backrest frame (2) which, when installed as intended, has two frame supports (6) oriented in the longitudinal direction of the back for stretching a backrest textile, and a lumbar support adjusting device (8) which is attached to one of the frame supports ( 6) is mounted displaceably in the longitudinal direction (10) of the respective frame support (6). The lumbar support adjusting device (8) has a flap (20) for reversibly bulging the backrest textile and an elongated adjusting rail (22) aligned along the frame support (6), the flap (20) consisting of a backrest surface spanned by the frame supports (6) hinged out in a pivot point (24) on the elongated adjusting rail (22), and wherein the flap (20) for unfolding is coupled by force transmission to a traction mechanism (26) arranged on the adjusting rail (22).

Description

Die Erfindung betrifft eine Rückenlehnenanordnung für Sitzmöbel. Des Weiteren betrifft die Erfindung ein Sitzmöbel, insbesondere einen Bürostuhl, mit einem Sitzträger für ein Sitzteil und mit der vorstehenden Rückenlehnenanordnung.The invention relates to a backrest arrangement for seating furniture. The invention further relates to a piece of furniture, in particular an office chair, with a seat support for a seat part and with the protruding backrest arrangement.

Unter "Lordose" wird eine natürliche bauchwärtige Krümmung insbesondere der Lendenwirbelsäule verstanden. Eine Lordosenstütze stellt ein Element an einem Sitzmöbel dar, welches die Lendenwirbelsäule einer auf dem Sitzmöbel sitzenden Person unterstützt. Bei einem längeren (aufrechten) Sitzen kann die Muskulatur der Lendenwirbelsäule ermüden. Die Lordosenstütze hilft hier, die natürliche Haltung der Lordose zu bewahren. Die Lordosenstütze ist hierzu zweckmäßigerweise im Bereich der Lordose an einem Lehnenrahmen der Rückenlehne angeordnet."Lordosis" is understood to mean a natural curvature of the abdomen, in particular of the lumbar spine. A lumbar support is an element on a piece of furniture that supports the lumbar spine of a person sitting on the piece of furniture. If you sit upright for a long time, the muscles of the lumbar spine can become fatigued. The lumbar support helps to maintain the natural posture of the lordosis. For this purpose, the lumbar support is expediently arranged in the area of the lordosis on a backrest frame of the backrest.

Derartige Lordosenstützen finden daher vor allem Anwendung bei Sitzmöbeln, auf denen Personen oftmals für eine lange Zeitdauer ununterbrochen sitzen. Dies sind beispielsweise Bürostühle. Um eine Anpassung an unterschiedliche Personen und/oder Sitzsituationen zu ermöglichen, sind Lordosenstützen häufig mittels einer Verstellvorrichtung vertikal (höhen-)verstellbar an der Rückenlehne beziehungsweise an dem Lehnenrahmen angeordnet.Such lumbar supports are therefore mainly used in seating furniture on which people often sit continuously for a long period of time. These are, for example, office chairs. In order to enable adaptation to different people and / or sitting situations, lumbar supports are often arranged on the backrest or on the backrest frame so as to be vertically (height) adjustable by means of an adjusting device.

Zusätzlich oder alternativ sind Lordosenstützen auch häufig in Tiefenrichtung verstellbar, um eine Anpassbarkeit an die individuelle Wölbung der Lordose zu ermöglichen.Additionally or alternatively, lumbar supports are also often adjustable in the depth direction in order to enable them to be adapted to the individual curvature of the lordosis.

Neben Sitzmöbeln, die ein an der Rückenlehne angeordnetes Rückenpolster, das mithin undurchsichtig ist, aufweisen, in das sich die Lordosenstütze unsichtbar integrieren lässt, gibt es auch Sitzmöbel mit einer lediglich mit Textil, bspw. einem Netz bespannten Rückenlehne. In letzterem Fall ist aufgrund der Transparenz der Rückenlehne eine möglichst unauffällige und dennoch möglichst flexible Verstellung der Rückenlehne im Bereich der Lendenwirbelsäule erwünscht. Eine sich quer über die (Netz-)Rückenlehne erstreckende Mechanik der Lordosenstütze kann hier als optisch störend empfunden werden.In addition to seating furniture that has a back cushion arranged on the backrest, which is therefore opaque, in which the lumbar support is invisible can be integrated, there is also seating with a backrest that is only covered with textile, e.g. a mesh. In the latter case, due to the transparency of the backrest, an adjustment of the backrest in the region of the lumbar spine that is as inconspicuous as possible and yet as flexible as possible is desired. A mechanism of the lumbar support extending across the (mesh) backrest can be perceived as visually disturbing here.

Der Erfindung liegt die Aufgabe zugrunde, eine besonders geeignete Rückenlehne anzugeben.The invention is based on the object of specifying a particularly suitable backrest.

Diese Aufgabe wird erfindungsgemäß gelöst durch eine Rückenlehnenanordnung mit den Merkmalen des Anspruchs 1. Des Weiteren wird diese Aufgabe erfindungsgemäß gelöst durch ein Sitzmöbel mit den Merkmalen das Anspruchs 10. Vorteilhafte und teils für sich erfinderische Ausführungsformen und Weiterentwicklungen der Erfindung sind in den Unteransprüchen und der nachfolgenden Beschreibung dargelegt.This object is achieved according to the invention by a backrest arrangement with the features of claim 1. Furthermore, this object is achieved according to the invention by a piece of seating furniture with the features of claim 10. Advantageous and in part inventive embodiments and further developments of the invention are in the dependent claims and the following Description set out.

Die erfindungsgemäße Rückenlehnenanordnung ist zum Einsatz im Rahmen eines Sitzmöbels eingerichtet und vorgesehen. Die Rückenlehnenanordnung weist dazu einen Lehnenrahmen auf, der zwei im bestimmungsgemäßen Einbauzustand in Rückenlängsrichtung - die vorzugsweise etwa parallel zur Sagittalebene der Rückenlehnenanordnung und des diese aufweisenden Sitzmöbels verläuft - orientierte Rahmenträger zum Aufspannen eines Lehnentextils umfasst. Des Weiteren weist die Rückenlehnenanordnung wenigstens eine Lordosenstützenstellvorrichtung auf, die an einem der Rahmenträger in Längsrichtung des jeweiligen Rahmenträgers verschiebbar gelagert ist. Die Lordosenstützenstellvorrichtung weist eine Wölbklappe zum reversiblen Auswölben des Lehnentextils sowie eine langgestreckte, entlang des Rahmenträgers ausgerichtete Stellschiene auf. Die Wölbklappe ist dabei aus einer von den Rahmenträgern aufgespannten Lehnenfläche heraus klappbar in einem Schwenkpunkt an der langgestreckten Stellschiene angelenkt. Vorzugsweise ist die Wölbklappe somit im bestimmungsgemäßen Einbauzustand in Sagittalrichtung verstellbar. Außerdem ist die Wölbklappe zum Ausklappen kraftübertragungstechnisch mit einem an der Stellschiene angeordneten (d. h. insbesondere gehalterten) Zugmittelgetriebe gekoppelt.The backrest arrangement according to the invention is set up and intended for use in the context of a chair. For this purpose, the backrest arrangement has a backrest frame which, when installed as intended, comprises two frame supports for stretching a backrest textile, oriented in the longitudinal direction of the back - which preferably runs approximately parallel to the sagittal plane of the backrest arrangement and the seating furniture that has it. Furthermore, the backrest arrangement has at least one lumbar support adjusting device, which is mounted on one of the frame supports so as to be displaceable in the longitudinal direction of the respective frame support. The lumbar support adjusting device has a flap for reversible bulging of the backrest textile as well as an elongated adjusting rail aligned along the frame support. The flap is hinged from a backrest surface spanned by the frame supports so as to be hinged at a pivot point on the elongated adjusting rail. The flap is therefore preferably adjustable in the sagittal direction in the intended installation state. In addition, the flap is power transmission technology for folding out coupled to a traction mechanism arranged (ie, in particular, held) on the adjusting rail.

Als Sagittalebene wird dabei die Ebene der Rückenlehnenanordnung bzw. des Sitzmöbels verstanden, die in einer bestimmungsgemäßen Sitzposition eines Nutzers des Sitzmöbels dessen Sagittalebene entspricht. Bei normaler, üblicher Sitzposition des Nutzers verläuft die Sagittalebene senkrecht zur Sitzfläche sowie zur Fläche der Rückenlehne, die Sagittalrichtung mithin im Wesentlichen parallel zur Sitzfläche und senkrecht zur Fläche der Rückenlehne.In this context, the sagittal plane is understood to be the plane of the backrest arrangement or of the chair which corresponds to the sagittal plane of a user of the chair in an intended seating position. In the normal, customary sitting position of the user, the sagittal plane runs perpendicular to the seat surface and to the surface of the backrest, and the sagittal direction therefore essentially parallel to the seat surface and perpendicular to the surface of the backrest.

Dadurch, dass ein Zugmittelgetriebe zum Antrieb der Wölbklappe eingesetzt ist, kann der Krafteinleitungspunkt zum Erzeugen einer zum Verstellen der Wölbklappe erforderlichen Stellkraft auf einfache Weise - insbesondere hinsichtlich des Abstands zu der Wölbklappe - frei gewählt werden, vorteilhafterweise ohne eine Bauteilanzahl oder einen zur Unterbringung entsprechend vergrößerter Kraftvermittlungselemente (bspw. Zahnräder) vergrößerten Bauraum hinnehmen zu müssen.Because a traction mechanism is used to drive the flap, the force application point for generating the actuating force required to adjust the flap can be easily selected - particularly with regard to the distance to the flap - advantageously without a number of components or a correspondingly larger number of components To have to accept power transmission elements (e.g. gears) increased installation space.

Die Wölbklappe weist vorzugsweise eine backenartige Auflage (vergleichbar zu einer "Backe" eines "Ohrenbackensessels") für das Lehnentextil auf. Im Bereich dieser backenartigen Auflage ist die quer zur Sagittalebene verlaufende Breite der Wölbklappe wenigstens um etwa das Doppelte vergrößert. Allerdings ist die Wölbklappe auch im Bereich dieser Backe vorzugsweise schmal im Vergleich zur Breite der von den Rahmenträgern aufgespannten Lehnenfläche. Dadurch kann die Lordosenstützenstellvorrichtung auch bei einem als Lehnentextil verwendeten Netz möglichst unauffällig gehalten werden.The flap preferably has a cheek-like support (comparable to a "cheek" of a "winged armchair") for the backrest textile. In the area of this jaw-like support, the width of the flap extending transversely to the sagittal plane is at least doubled. However, the flap is also preferably narrow in the area of this jaw in comparison to the width of the backrest surface spanned by the frame supports. As a result, the lumbar support adjusting device can be kept as inconspicuous as possible even with a net used as a backrest textile.

Weiter bevorzugt ist die Wölbklappe im Bereich dieser Backe auch quer zur Längsrichtung des Rahmenträgers gewölbt, so dass das Lehnentextil wie über einen Buckel lokal (d. h. insbesondere wellenartig) ausgestellt wird.More preferably, the flap is also arched transversely to the longitudinal direction of the frame support in the area of this cheek, so that the backrest textile is displayed locally (ie in particular in a wave-like manner) as if over a hump.

Um eine symmetrische Auswölbung des Lehnentextils zu ermöglichen, ist vorzugsweise an jedem der beiden Rahmenträger jeweils eine Lordosenstützenstellvorrichtung angeordnet.In order to enable a symmetrical bulging of the backrest textile, a lumbar support adjusting device is preferably arranged on each of the two frame supports.

In einer bevorzugten Ausführung ist an der Stellschiene eine Führungskulisse für das Zugmittel des Zugmittelgetriebes, konkret für einen an dem Zugmittel befestigten Kulissenstein ausgebildet ist. Der Kulissenstein ist dabei zwischen der Führungskulisse und einer an der Wölbklappe ausgeformten Stellkulisse angeordnet, insbesondere so, dass der Kulissenstein bei Bewegung des Zugmittels entlang der Führungskulisse und der Stellkulisse der Wölbklappe gleitet und dabei die Stellkraft auf die Wölbklappe ausübt (d. h. überträgt). Die Stellkulisse ist dabei vorzugsweise derart ausgeformt, dass diese in einer Neutralstellung (auch als Nullstellung bezeichnet), in der die Wölbklappe nicht ausgeklappt ist, schräg in Richtung auf die Führungskulisse ausgerichtet ist, so dass der Kulissenstein bei Verstellung in Ausklapprichtung vergleichbar zu einem Keil zwischen die Führungskulisse und die Stellkulisse bewegt wird und somit zu einem zunehmenden Ausklappen der Wölbklappe führt.In a preferred embodiment, a guide slot for the traction mechanism of the traction mechanism, specifically for a sliding block attached to the traction mechanism, is formed on the adjusting rail. The sliding block is arranged between the guide slot and an adjusting slot formed on the flap, in particular in such a way that the sliding block slides along the guide slot and the adjusting slot of the flap when the traction device moves, thereby exerting the actuating force on the flap (i.e. transmitting it). The setting link is preferably shaped in such a way that in a neutral position (also referred to as the zero position), in which the flap is not folded out, it is oriented obliquely in the direction of the guide link, so that the sliding block is comparable to a wedge when adjusted in the unfolding direction the guide link and the setting link is moved and thus leads to an increasing unfolding of the flap.

In einer zweckmäßigen Weiterbildung weist die vorstehend beschriebene Stellkulisse der Wölbklappe mehrere (d. h. wenigstens zwei) Rastmulden für den Kulissenstein auf. In diesen Rastmulden kann der Kulissenstein zur Einstellung von diskreten Stellpositionen einliegen. Für den Nutzer des Sitzmöbels ist so auch eine haptische Rückmeldung bei Einstellung der Vorwölbung der Lordosenstütze - die sich aus dem von der Lordosenstützenstellvorrichtung ausgewölbten Lehnentextil ergibt - ermöglicht.In an expedient further development, the above-described setting link of the flap has several (i.e. at least two) locking recesses for the sliding block. The sliding block for setting discrete positioning positions can lie in these locking recesses. For the user of the chair, haptic feedback is also made possible when the protrusion of the lumbar support is set - which results from the backrest fabric bulged by the lumbar support adjusting device.

In einer weiteren zweckmäßigen Ausbildung überragt die Stellschiene die Wölbklappe um wenigstens die Hälfte der Länge der Wölbklappe in Längsrichtung des Rahmenträgers. Anders ausgedrückt ist die Stellschiene um wenigstens die Hälfte (der Länge der Wölbklappe) länger als die Wölbklappe. Der Schwenkpunkt ist dabei bevorzugt in einem Bereich zwischen den beiden Enden der Stellschiene angeordnet.In a further useful embodiment, the adjusting rail protrudes beyond the flap by at least half the length of the flap in the longitudinal direction of the frame support. In other words, the adjusting rail is at least half (the length of the flap) longer than the flap. The pivot point is preferably arranged in an area between the two ends of the adjusting rail.

Vorzugsweise liegt die Wölbklappe in ihrer Neutralstellung über ihre gesamte Länge auf der Stellschiene auf. Bevorzugt überlappt die Wölbklappe die Stellschiene quer zur Sagittalebene. Insbesondere weist die Wölbklappe hier eine Nut auf, in der die Stellkulisse ausgebildet ist und in der die Stellschiene in der Neutralstellung einliegt.In its neutral position, the flap preferably rests on the adjusting rail over its entire length. The flap preferably overlaps the adjusting rail transversely to the sagittal plane. In particular, the flap here has a groove in which the adjusting link is formed and in which the adjusting rail rests in the neutral position.

In einer bevorzugten Ausführung ist an einem der beiden Enden der Stellschiene ein Stellelement zum Aufbringen der auf die Wölbklappe wirkenden Stellkraft auf das Zugmittel angeordnet. Vorzugsweise handelt es sich bei diesem Stellelement um einen Drehknauf, eine Art Flügelschraubenkopf oder dergleichen, der zum rotatorischen Antrieb des Zugmittels eingerichtet und vorgesehen ist. Dadurch, dass das Stellelement an einem Ende der Stellschiene angeordnet ist, ist das Stellelement auch mit möglichst großem Abstand zu der Wölbklappe, insbesondere zu dem Schwenkpunkt angeordnet. Dies ist dahingehend vorteilhaft, da so die Positionierung des Stellelements in Längsrichtung an dem Rahmenträger in einen Bereich verlegt werden kann, der vom Nutzer des Sitzmöbels vergleichsweise komfortabel erreicht werden kann. Der Bereich der Lordose der Lendenwirbelsäule befindet sich nämlich regelmäßig in einem Bereich des Rückens, der von den meisten Personen nicht bequem, sondern meist nur unter Verwindung des Oberkörpers und/oder der Arme erreicht werden kann.In a preferred embodiment, an adjusting element for applying the adjusting force acting on the flap to the traction means is arranged on one of the two ends of the adjusting rail. This adjusting element is preferably a rotary knob, a type of winged screw head or the like, which is set up and provided for the rotary drive of the traction mechanism. Because the adjusting element is arranged at one end of the adjusting rail, the adjusting element is also arranged at the greatest possible distance from the flap, in particular from the pivot point. This is advantageous in that the positioning of the adjusting element in the longitudinal direction on the frame support can be relocated to an area that can be reached comparatively comfortably by the user of the chair. The area of the lordosis of the lumbar spine is usually located in an area of the back that most people cannot reach comfortably, but usually only by twisting the upper body and / or the arms.

Vorzugsweise ist das Stellelement an dem im bestimmungsgemäßen Einbauzustand in Richtung Boden weisenden Ende angeordnet. In Verbindung mit dem vorzugsweise etwa mittig zwischen den beiden Enden angeordneten - und/oder zumindest etwa 5 bis 20 cm, vorzugsweise etwa 15 cm von dem unteren Ende beabstandeten - Schwenkpunkt ist das Stellelement in einem bei normaler Sitzhaltung auf dem Sitzmöbel vergleichsweise einfach zu erreichenden Bereich der Rückenlehnenanordnung, insbesondere der mittels dieser am Sitzmöbel gebildeten Rückenlehne angeordnet.The actuating element is preferably arranged at the end pointing in the direction of the floor in the intended installation state. In connection with the pivot point, which is preferably located approximately centrally between the two ends - and / or at least approximately 5 to 20 cm, preferably approximately 15 cm from the lower end - the adjusting element is in an area that is comparatively easy to reach with a normal sitting posture on the seating furniture the backrest arrangement, in particular the backrest formed by means of this on the seating furniture.

Vorzugsweise dient das Stellelement nicht nur zur Aufbringung der Stellkraft für das Ausklappen (oder auch Einklappen) der Wölbklappe sondern auch zur Verstellung, konkret Verschiebung der gesamten Lordosenstützenstellvorrichtung in Längsrichtung des jeweiligen Rahmenträgers. Mithin greift der Nutzer des Sitzmöbels sowohl zur "Höhenverstellung" der Lordosenstütze als auch zur Tiefenverstellung (d. h. zum Aus- oder Einwölben) der Lordosenstütze an das Stellelement.The adjusting element preferably serves not only to apply the adjusting force for unfolding (or also folding in) the flap, but also for adjusting, specifically shifting, the entire lumbar support adjusting device in Longitudinal direction of the respective frame support. Thus, the user of the seating furniture grabs the adjusting element both to “adjust the height” of the lumbar support and to adjust the depth (ie to bulge out or in) the lumbar support.

Die Lordosenstützenstellvorrichtung ist in einer bevorzugten Ausführung mit der Stellschiene in einer Führungsschiene des Rahmenträgers, vorzugsweise einer in dem Rahmenträger ausgebildeten Nut, verschiebbar geführt. Weiter vorzugsweise steht im Wesentlichen nur die Wölbklappe aus der Führungsschiene hervor, so dass die gesamte Lordosenstütze besonders unauffällig gestaltet sein kann.In a preferred embodiment, the lumbar support adjusting device is guided displaceably with the adjusting rail in a guide rail of the frame support, preferably a groove formed in the frame support. More preferably, only the flap protrudes from the guide rail, so that the entire lumbar support can be designed to be particularly inconspicuous.

In einer zweckmäßigen Ausführung ist das Zugmittel durch eine Perlenschnur gebildet, d. h. eine Schnur mit daran fest (d. h. unverschiebbar) an diskreten Positionen angeordneten Kugeln (die "Perlen"). Die Perlen dienen dabei zur formschlüssigen Kraftübertragung von dem Stellelement auf das Zugmittel. Vorzugsweise ist in diesem Fall auch der Kulissenstein mittels der Perlen formschlüssig an dem Zugmittel gehaltert. Alternativ ist das Zugmittel durch eine Kette (bspw. eine Art Fahrradkette), einen Riemen (bspw. einen Zahnriemen, Keilriemen etc.), ein Seil oder dergleichen gebildet.In an expedient embodiment, the traction means is formed by a string of pearls, i. H. a string with balls (the "pearls") fixedly (i.e. immovable) thereon in discrete positions. The beads are used for the positive transmission of force from the adjusting element to the traction mechanism. In this case, the sliding block is preferably also held in a form-fitting manner on the traction means by means of the beads. Alternatively, the traction means is formed by a chain (for example a type of bicycle chain), a belt (for example a toothed belt, V-belt, etc.), a rope or the like.

Zweckmäßigerweise ist das Zugmittel an beiden Enden der Stellschiene mittels einer Umlenkrolle geführt, d. h. umgelenkt. Dadurch werden vorteilhafterweise Reibungsverluste verringert. Bevorzugt ist eine der Umlenkrollen als Antriebsrolle ausgebildet und mit dem Stellelement kraftübertragungstechnisch gekoppelt. Optional ist auch nur die Antriebsrolle vorhanden, wohingegen die zweite Umlenkrolle fehlt.Appropriately, the traction means is guided at both ends of the adjusting rail by means of a pulley, d. H. diverted. This advantageously reduces friction losses. One of the deflection rollers is preferably designed as a drive roller and is coupled to the actuating element by means of force transmission. Optionally, only the drive roller is available, whereas the second deflection roller is missing.

Das erfindungsgemäße Sitzmöbel stellt insbesondere einen Bürostuhl dar. Das Sitzmöbel umfasst einen Sitzträger für ein Sitzteil, an dem vorzugsweise ein Sitzpolster angeordnet ist. Des Weiteren umfasst das Sitzmöbel die vorstehend beschriebene Rückenlehnenanordnung. Mithin weist das Sitzmöbel die vorstehend beschriebenen Merkmale der Rückenlehnenanordnung sowie auch deren Vorteile gleichermaßen auf.The seating furniture according to the invention represents in particular an office chair. The seating furniture comprises a seat support for a seat part, on which a seat cushion is preferably arranged. Furthermore, the seating furniture comprises the backrest arrangement described above. The seating furniture consequently has the features of the backrest arrangement described above and also their advantages.

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

Fig. 1, 2
in einer schematischen Perspektivansicht und einer schematischen Frontalansicht eine Rückenlehnenanordnung,
Fig. 3
in einer schematischen Perspektivansicht eine Lordosenstützenstellvorrichtung der Rückenlehnenanordnung in einer Neutralstellung,
Fig. 4
in einer schematischen Seitenansicht die Lordosenstützenstellvorrichtung in einer ausgestellten Position,
Fig. 5
die Lordosenstützenstellvorrichtung in einer schematischen Explosionsdarstellung,
Fig. 6
die Lordosenstützenstellvorrichtung in einer teilweisen schematischen Explosionsdarstellung,
Fig. 7, 8
jeweils in einer schematischen Teilschnittansicht die Lordosenstützenstellvorrichtung in der Neutralstellung und der ausgestellten Position, und
Fig. 9
in einer schematischen Teilschnittansicht eine Wölbklappe der Lordosenstützenstellvorrichtung.
Exemplary embodiments of the invention are explained in more detail below with reference to a drawing. Show in it:
Fig. 1, 2
a backrest arrangement in a schematic perspective view and a schematic frontal view,
Fig. 3
in a schematic perspective view a lumbar support adjusting device of the backrest arrangement in a neutral position,
Fig. 4
in a schematic side view the lumbar support adjusting device in an exposed position,
Fig. 5
the lumbar support adjusting device in a schematic exploded view,
Fig. 6
the lumbar support adjusting device in a partially schematic exploded view,
Figures 7, 8
each in a schematic partial sectional view of the lumbar support adjusting device in the neutral position and the deployed position, and
Fig. 9
in a schematic partial sectional view a flap of the lumbar support adjusting device.

Einander entsprechende Teile sind in allen Figuren stets mit gleichen Bezugszeichen versehen.Corresponding parts are always provided with the same reference symbols in all figures.

In Fig. 1 und 2 ist eine Rückenlehnenanordnung, kurz als Rückenlehne 1 bezeichnet, für ein Sitzmöbel, konkret einen Bürostuhl (nicht näher dargestellt) dargestellt. Die Rückenlehne 1 weist einen Lehnenrahmen 2 auf, der zwei im bestimmungsgemäßen Einbauzustand parallel zur Sagittalebene 4 des Sitzmöbels orientierte Rahmenträger 6 zum Aufspannen eines Lehnentextils (nicht dargestellt) umfasst. Bei dem Lehnentextil handelt es sich um ein Netz. Des Weiteren weist die Rückenlehne 1 zwei Lordosenstützenstellvorrichtungen 8 auf, die jeweils an einem der Rahmenträger 6 angeordnet sind. Die Lordosenstützenstellvorrichtungen 8 sind dabei in Längsrichtung 10 (die parallel zur Sagittalebene 4 verläuft) des jeweiligen Rahmenträgers 6 (oder auch des Rückens des Nutzers des Sitzmöbels) verschiebbar an diesem gelagert. Konkret sind die Lordosenstützenstellvorrichtungen 8 in jeweils einer durch eine Nut gebildeten Führungsschiene 12 des jeweiligen Rahmenträgers 6 aufgenommen und verschiebbar gelagert. Die Lordosenstützenstellvorrichtungen 8 sind dazu eingerichtet und vorgesehen, gemeinsam mit dem Netz eine verstellbare Lordosenstütze zu bilden, die in Hochrichtung (also in Längsrichtung 10) sowie hinsichtlich ihrer Tiefe, d. h. in Sagittalrichtung (in Fig. 2 also aus der Blattebene heraus) verstellbar ist.In Fig. 1 and 2 a backrest arrangement, referred to for short as backrest 1, for a piece of furniture, specifically an office chair (not shown in detail) is shown. The backrest 1 has a backrest frame 2 which, when installed as intended, comprises two frame supports 6, which are oriented parallel to the sagittal plane 4 of the chair, for stretching a backrest textile (not shown). The backrest textile is a network. Furthermore, the backrest 1 has two lumbar support adjusting devices 8, which are each arranged on one of the frame supports 6. The lumbar support adjusting devices 8 are in the longitudinal direction 10 (which runs parallel to the sagittal plane 4) of the respective frame support 6 (or also of the back of the user of the Seating furniture) slidably mounted on this. Specifically, the lumbar support adjusting devices 8 are each received in a guide rail 12, formed by a groove, of the respective frame support 6, and are mounted displaceably. The lumbar support adjusting devices 8 are set up and provided to form, together with the network, an adjustable lumbar support that is adjustable in the vertical direction (i.e. in the longitudinal direction 10) and in terms of its depth, ie in the sagittal direction (in Fig. 2 i.e. from the plane of the sheet) is adjustable.

Wie in den Fig. 3 bis 8 dargestellt ist, weisen die Lordosenstützenstellvorrichtungen 8 jeweils eine Wölbklappe 20 zum reversiblen Auswölben des Netzes auf. Außerdem weisen die Lordosenstützenstellvorrichtungen 8 eine langgestreckte, im montierten Zustand (s. Fig. 1 und 2) entlang des jeweiligen Rahmenträgers 6 ausgerichtete Stellschiene 22 auf. Die Wölbklappe 20 ist in einem Schwenkpunkt 24 der Stellschiene 22 schwenkbar angelenkt, so dass die Wölbklappe 20 aus einer von den Rahmenträgern 6 aufgespannten Lehnenfläche herausklappbar ist (vgl. Fig. 4, 8).As in the Figures 3 to 8 is shown, the lumbar support adjusting devices 8 each have a flap 20 for reversible bulging of the network. In addition, the lumbar support adjustment devices 8 have an elongated, in the assembled state (see FIG. Fig. 1 and 2 ) adjusting rail 22 aligned along the respective frame support 6. The flap 20 is pivotably articulated at a pivot point 24 of the adjusting rail 22, so that the flap 20 can be folded out of a backrest surface spanned by the frame supports 6 (cf. Fig. 4 , 8th ).

Die Wölbklappe 20 ist etwa mittig an der Stellschiene 22 angelenkt. Zur Verstellung, konkret zum Ausklappen ist die Wölbklappe 20 kraftübertragungstechnisch mit einem an der Stellschiene 22 angeordneten Zugmittelgetriebe 26 gekoppelt (vgl. Fig. 5, 7, 8). Das Zugmittelgetriebe 26 weist zwei, an den beiden Enden 28 der Stellschiene 22 angeordnete Umlenkrollen 30 auf. Als Zugmittel weist das Zugmittelgetriebe 26 eine Perlenschnur 32 auf. Die untere Umlenkrolle 30 bildet dabei eine Antriebsrolle für die Perlenschnur 32. Dazu ist diese Umlenkrolle 30 mit einem Stellelement, konkret einem Drehknauf 34 gekoppelt.The flap 20 is hinged approximately in the middle on the adjusting rail 22. For adjustment, specifically for folding out, the flap 20 is coupled in terms of force transmission to a traction mechanism 26 arranged on the adjusting rail 22 (cf. Fig. 5 , 7th , 8th ). The traction mechanism 26 has two deflection rollers 30 arranged at the two ends 28 of the adjusting rail 22. The traction mechanism 26 has a string of pearls 32 as the traction mechanism. The lower deflection roller 30 forms a drive roller for the string of pearls 32. For this purpose, this deflection roller 30 is coupled to an adjusting element, specifically a rotary knob 34.

Im bestimmungsgemäßen Montagezustand ist die untere Umlenkrolle 30 um etwa 15 cm von dem Schwenkpunkt 24 beabstandet. Dadurch ist der Drehknauf 34 in einem für einen Nutzer des Bürostuhls leicht erreichbar im Bereich eines unteren Abschnitts 36 der Rückenlehne 1 angeordnet. Der Drehknauf 34 dient neben der Betätigung des Zugmittelgetriebes 26 auch als Griff zur Verschiebung der gesamten Lordosenstützenstellvorrichtung 8 in Längsrichtung 10. Der jeweilige Drehknauf 34 ist dabei von einer Außenseite der Rückenlehne 1 her zugänglich.In the intended assembly state, the lower deflection roller 30 is spaced from the pivot point 24 by about 15 cm. As a result, the rotary knob 34 is arranged in a manner easily accessible to a user of the office chair in the area of a lower section 36 of the backrest 1. The rotary knob 34 serves not only to actuate the traction mechanism 26 but also as a handle for moving the entire Lumbar support adjusting device 8 in the longitudinal direction 10. The respective rotary knob 34 is accessible from an outside of the backrest 1.

Zur Führung der Perlenschnur 32 ist an der Stellschiene 22 eine Führungskulisse 38 ausgebildet. Auf dieser Führungskulisse 38 gleitet ein Kulissenstein 40, der formschlüssig mit der Perlenschnur 32 gekoppelt ist. Der Kulissenstein 40 wirkt bei Verschiebung entlang der Führungskulisse 38 - bei Betätigung des Drehknaufs 34 - auf eine an der Wölbklappe 20 ausgeformte Stellkulisse 42 (s. Fig. 7-9). Die Stellkulisse 42 ist derart ausgeformt, dass diese in einer Neutralstellung (s. Fig. 3, 6, 7 und 8), in der die Wölbklappe 20 nicht von der Stellschiene 22 weggeklappt ist, schräg in Richtung auf die Führungskulisse 38 ausgerichtet ist (s. Fig. 7). Dadurch drückt der Kulissenstein 40 bei Verstellung in Ausklapprichtung (d. h. Verschiebung des Kulissensteins 40 in Längsrichtung 10 nach unten, in Richtung auf den Schwenkpunkt 24) die Stellkulisse 42 von der Führungskulisse 38 weg, so dass die Wölbklappe 20 um den Schwenkunkt 24 ausgeklappt wird (s. Fig. 4).To guide the string of pearls 32, a guide slot 38 is formed on the adjusting rail 22. A sliding block 40, which is coupled to the string of pearls 32 in a form-fitting manner, slides on this guide link 38. When the sliding block 40 is moved along the guide slot 38 - when the rotary knob 34 is actuated - it acts on an adjusting slot 42 formed on the flap 20 (see FIG. Figures 7-9 ). The setting gate 42 is shaped in such a way that it is in a neutral position (see Fig. Fig. 3 , 6th , 7th and 8th ), in which the flap 20 is not folded away from the adjusting rail 22, is oriented obliquely in the direction of the guide slot 38 (see FIG. Fig. 7 ). As a result, when the sliding block 40 is adjusted in the unfolding direction (i.e. shifting the sliding block 40 downwards in the longitudinal direction 10, in the direction of the pivot point 24), the sliding block 42 pushes away from the guide slot 38, so that the flap 20 is folded out about the pivot point 24 (see Fig . Fig. 4 ).

In die Stellkulisse 42 sind außerdem mehrere Rastmulden 44 für den Kulissenstein 40 eingeformt (s. Fig. 7-9). In diesen Rastmulden 44 kann der Kulissenstein 40 einliegen, wodurch diskrete Stellpositionen vorgegeben sind.In addition, several locking recesses 44 for the sliding block 40 are formed in the setting link 42 (see FIG. Figures 7-9 ). The sliding block 40 can lie in these locking recesses 44, whereby discrete setting positions are specified.

Die Wölbklappe 20 weist einerseits eine im Profil gesehen (vgl. Fig. 4 und 6 bis 9) buckelartige Geometrie auf, an der das Netz aufliegen kann. Dadurch wird beim Ausklappen der Wölbklappe 20 eine vergleichsweise lokal begrenzte Aus- oder Vorwölbung des Netzes und somit ein Vorstehen der dadurch gebildeten Lordosenstütze erzielt. Um für das Netz eine gewisse Auflagefläche bereitzuhalten, weist die Wölbklappe 20 eine backenartig verbreiterte Auflage 46 (s. Fig. 1, 2, 3, 5). Dennoch ist die Breite der Wölbklappe 20 auch im Bereich dieser Auflage 46 schmal im Vergleich zur Breite der von den Rahmenträgern 6 aufgespannten Lehnenfläche (vgl. Fig. 1, 2).The flap 20 has on the one hand a seen in profile (cf. Fig. 4 and 6 to 9 ) hump-like geometry on which the network can rest. As a result, when the flap 20 is folded out, a comparatively locally limited bulging or protrusion of the network and thus a protrusion of the lumbar support formed thereby is achieved. In order to have a certain support surface ready for the net, the flap 20 has a support 46 that is widened in the manner of a jaw (see Fig. Fig. 1 , 2 , 3 , 5 ). Nevertheless, the width of the flap 20 is also narrow in the area of this support 46 compared to the width of the backrest surface spanned by the frame girders 6 (cf. Fig. 1 , 2 ).

Die Stellkulisse 42 der Wölbklappe 20 ist ferner in einer Nut 48 der Wölbklappe 20 angeordnet. Diese Nut 48 ist dabei derart bemessen, dass die Wölbklappe 20 die Stellschiene 22 zumindest in der Neutralstellung außenseitig umgreift (vgl. Fig. 7).The setting link 42 of the flap 20 is also arranged in a groove 48 of the flap 20. This groove 48 is dimensioned such that the flap 20 engages around the adjusting rail 22 on the outside at least in the neutral position (cf. Fig. 7 ).

Außerdem ist die jeweilige Lordosenstützenstellvorrichtung 8 derart in der zugeordneten Führungsschiene 12 des Rahmenträgers 6 angeordnet, dass meist nur die Wölbklappe 20 außenseitig erkennbar ist.In addition, the respective lumbar support adjusting device 8 is arranged in the associated guide rail 12 of the frame support 6 in such a way that mostly only the flap 20 can be seen on the outside.

Wie aus Fig. 9 und 7 erkennbar ist, ist in die Stellkulisse 42 in Längsrichtung 10 verlaufend ein nutartige Vertiefung 50 eingearbeitet, in der die Perlenschnur 32 bei nicht vollständig ausgeklappter Wölbklappe 20 verlaufen kann, wohingegen der Kulissenstein 40 auf der gegenüber der Vertiefung 50 erhabenen, eigentlichen Gleitfläche 52 der Stellkulisse 42 aufliegt. Dadurch kann die Wölbklappe 20 die Stellschiene 22 besonders weit umgreifen.How out Fig. 9 and 7th As can be seen, a groove-like recess 50 running in the longitudinal direction 10 is incorporated into the setting slot 42, in which the string of pearls 32 can run when the flap 20 is not fully unfolded, whereas the sliding block 40 is on the actual sliding surface 52 of the setting slot 42, which is raised opposite the recess 50 rests. As a result, the flap 20 can encompass the adjusting rail 22 particularly far.

Der Gegenstand der Erfindung ist nicht auf das vorstehend beschriebene Ausführungsbeispiel beschränkt. Vielmehr können weitere Ausführungsformen der Erfindung von dem Fachmann aus der vorstehenden Beschreibung abgeleitet werden.The subject matter of the invention is not limited to the exemplary embodiment described above. Rather, further embodiments of the invention can be derived from the above description by a person skilled in the art.

BezugszeichenlisteList of reference symbols

11
Rückenlehnebackrest
22
LehnenrahmenBackrest frame
44th
SagittalebeneSagittal plane
66
RahmenträgerFrame beams
88th
LordosenstützenstellvorrichtungLumbar support adjustment device
1010
LängsrichtungLongitudinal direction
1212th
FührungsschieneGuide rail
2020th
WölbklappeFlap
2222nd
StellschieneAdjustment rail
2424
SchwenkpunktPivot point
2626th
ZugmittelgetriebeTraction drive
2828
EndeThe End
3030th
UmlenkrollePulley
3232
PerlenschnurString of pearls
3434
DrehknaufKnob
3636
unterer Abschnittlower section
3838
FührungskulisseLeadership backdrop
4040
KulissensteinSliding block
4242
StellkulisseSetting backdrop
4444
RastmuldeLocking recess
4646
AuflageEdition
4848
NutGroove
5050
Vertiefungdeepening
5252
GleitflächeSliding surface

Claims (10)

Rückenlehnenanordnung (1) für ein Sitzmöbel, - mit einem Lehnenrahmen (2), der zwei im bestimmungsgemäßen Einbauzustand in Rückenlängsrichtung orientierte Rahmenträger (6) zum Aufspannen eines Lehnentextils aufweist, und - mit wenigstens einer Lordosenstützenstellvorrichtung (8), die an einem der Rahmenträger (6) in Längsrichtung (10) des jeweiligen Rahmenträgers (6) verschiebbar gelagert ist, wobei die Lordosenstützenstellvorrichtung (8) eine Wölbklappe (20) zum reversiblen Auswölben des Lehnentextils sowie eine langgestreckte, entlang des Rahmenträgers (6) ausgerichtete Stellschiene (22) aufweist, wobei die Wölbklappe (20) aus einer von den Rahmenträgern (6) aufgespannten Lehnenfläche heraus klappbar in einem Schwenkpunkt (24) an der langgestreckten Stellschiene (22) angelenkt ist, und wobei die Wölbklappe (20) zum Ausklappen kraftübertragungstechnisch mit einem an der Stellschiene (22) angeordneten Zugmittelgetriebe (26) gekoppelt ist.Backrest arrangement (1) for a piece of seating furniture, - With a backrest frame (2) which, when installed as intended, has two frame supports (6) oriented in the longitudinal direction of the back for stretching a backrest textile, and - With at least one lumbar support adjusting device (8) which is mounted on one of the frame supports (6) so as to be displaceable in the longitudinal direction (10) of the respective frame support (6), the lumbar support adjusting device (8) having a flap (20) for reversibly bulging the backrest textile and an elongated adjusting rail (22) aligned along the frame support (6), the flap (20) extending out of a backrest surface spanned by the frame supports (6) hinged at a pivot point (24) on the elongated adjusting rail (22), and wherein the flap (20) is coupled by force transmission to a traction mechanism (26) arranged on the adjusting rail (22). Rückenlehnenanordnung (1) nach Anspruch 1,
wobei an der Stellschiene (22) eine Führungskulisse (38) für das Zugmittel (32) des Zugmittelgetriebes (26) ausgebildet ist, wobei an dem Zugmittel (32) ein Kulissenstein (40) befestigt ist, der zwischen der Führungskulisse (38) und einer an der Wölbklappe (20) ausgeformten Stellkulisse (42) angeordnet ist.Backrest arrangement (1) according to claim 1,
wherein a guide slot (38) for the traction means (32) of the traction mechanism (26) is formed on the adjusting rail (22), a sliding block (40) being attached to the traction means (32), which is located between the guide slot (38) and a is arranged on the flap (20) formed adjusting link (42). Rückenlehnenanordnung (1) nach Anspruch 2,
wobei die Stellkulisse (42) Rastmulden (44) für den Kulissenstein (40) aufweist, in denen der Kulissenstein (40) zur Einstellung von diskreten Stellpositionen einliegen kann.Backrest arrangement (1) according to claim 2,
wherein the setting link (42) has detent recesses (44) for the sliding block (40) in which the sliding block (40) can be inserted for setting discrete setting positions. Rückenlehnenanordnung (1) nach einem der Ansprüche 1 bis 3,
wobei die Stellschiene (22) die Wölbklappe (20) um wenigstens die Hälfte der Länge der Wölbklappe (20) in Längsrichtung (10) des Rahmenträgers (6) überragt, und wobei der Schwenkpunkt (24) in einem Bereich zwischen den beiden Enden (28) der Stellschiene (22) angeordnet ist.Backrest arrangement (1) according to one of Claims 1 to 3,
wherein the adjusting rail (22) the flap (20) by at least half the length of the flap (20) in the longitudinal direction (10) of the frame support (6) towers above, and wherein the pivot point (24) is arranged in a region between the two ends (28) of the adjusting rail (22). Rückenlehnenanordnung (1) nach einem der Ansprüche 1 bis 4,
wobei an einem der Enden (28) der Stellschiene (22) ein Stellelement (34) zum Aufbringen der auf die Wölbklappe (20) wirkenden Stellkraft auf das Zugmittel (32) angeordnet ist.Backrest arrangement (1) according to one of Claims 1 to 4,
an adjusting element (34) for applying the adjusting force acting on the flap (20) to the traction means (32) is arranged at one of the ends (28) of the adjusting rail (22). Rückenlehnenanordnung (1) nach Anspruch 4 und 5,
wobei das Stellelement (34) an dem im bestimmungsgemäßen Einbauzustand in Richtung Boden weisenden Ende (28) der Stellschiene (22) angeordnet ist.Backrest arrangement (1) according to Claim 4 and 5,
wherein the adjusting element (34) is arranged at the end (28) of the adjusting rail (22) pointing towards the floor in the intended installation state. Rückenlehnenanordnung (1) nach einem der Ansprüche 1 bis 6,
wobei die Lordosenstützenstellvorrichtung (8) mit der Stellschiene (22) in einer Führungsschiene (12) des Rahmenträgers (6) verschiebbar geführt ist.Backrest arrangement (1) according to one of Claims 1 to 6,
wherein the lumbar support adjusting device (8) with the adjusting rail (22) is displaceably guided in a guide rail (12) of the frame support (6). Rückenlehnenanordnung (1) nach einem der Ansprüche 1 bis 7,
wobei das Zugmittel durch eine Perlenschnur (32) gebildet ist.Backrest arrangement (1) according to one of Claims 1 to 7,
wherein the traction means is formed by a string of pearls (32). Rückenlehnenanordnung (1) nach einem der Ansprüche 1 bis 8,
wobei das Zugmittel (32) an beiden Enden (28) der Stellschiene (22) mittels einer Umlenkrolle (30) geführt ist, insbesondere wobei eine der Umlenkrollen (30) als Antriebsrolle mit dem Stellelement (34) gekoppelt ist.Backrest arrangement (1) according to one of Claims 1 to 8,
wherein the traction means (32) is guided at both ends (28) of the adjusting rail (22) by means of a deflection roller (30), in particular one of the deflection rollers (30) being coupled to the adjusting element (34) as a drive roller. Sitzmöbel, insbesondere Bürostuhl, mit einem Sitzträger (6) für ein Sitzteil und mit einer Rückenlehnenanordnung (1) nach einem der Ansprüche 1 bis 9.Seating furniture, in particular an office chair, with a seat support (6) for a seat part and with a backrest arrangement (1) according to one of Claims 1 to 9.
EP20157720.2A 2019-03-29 2020-02-17 Backrest arrangement and seating furniture Active EP3714738B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019204485.9A DE102019204485B4 (en) 2019-03-29 2019-03-29 Backrest arrangement and seating furniture

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EP3714738A1 true EP3714738A1 (en) 2020-09-30
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3204540A1 (en) * 1982-02-10 1983-08-18 Peter 5000 Köln Backsmann Back support, in particular for motor vehicle seats
DE102005035947A1 (en) * 2005-06-29 2007-01-11 Grammer Ag Vehicle seat with a deformable backrest

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0803400A3 (en) * 1996-04-23 1998-12-09 Lear Corporation Vehicle seat lumbar support
US6749000B2 (en) * 2001-12-17 2004-06-15 Hunter Douglas Industries Bv Safety device for cord-operated control system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3204540A1 (en) * 1982-02-10 1983-08-18 Peter 5000 Köln Backsmann Back support, in particular for motor vehicle seats
DE102005035947A1 (en) * 2005-06-29 2007-01-11 Grammer Ag Vehicle seat with a deformable backrest

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DE102019204485B4 (en) 2022-08-11
EP3714738B1 (en) 2023-05-10

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