EP1836932A2 - Device for lumbar support - Google Patents

Device for lumbar support Download PDF

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Publication number
EP1836932A2
EP1836932A2 EP07004503A EP07004503A EP1836932A2 EP 1836932 A2 EP1836932 A2 EP 1836932A2 EP 07004503 A EP07004503 A EP 07004503A EP 07004503 A EP07004503 A EP 07004503A EP 1836932 A2 EP1836932 A2 EP 1836932A2
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EP
European Patent Office
Prior art keywords
membrane
lumbar support
backrest frame
backrest
webs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07004503A
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German (de)
French (fr)
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EP1836932B1 (en
EP1836932A3 (en
Inventor
Klaus Maier
Kurt Buntru
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Sedus Stoll AG
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Sedus Stoll AG
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Publication of EP1836932A2 publication Critical patent/EP1836932A2/en
Publication of EP1836932A3 publication Critical patent/EP1836932A3/en
Application granted granted Critical
Publication of EP1836932B1 publication Critical patent/EP1836932B1/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

Definitions

  • the invention relates to the field of furniture industry. It relates to a device for lumbar support for an office chair, the backrest consists of a membrane-covered backrest frame.
  • the lordosis is the curvature of the spine forward (hollow back).
  • the said devices for lumbar support should fill this cavity as accurately as possible.
  • a single-sided membrane-covered backrest without upholstery construction does not constitute an over-upholstery of the plastic element. Therefore, a device for lordosis support placed behind or in front of the membrane and stored independently of the membrane in the backrest frame will disadvantageously be uncomfortable to the back, even if it is soft or padded , This is done according to EP 0 856 269 B1 For example, to prevent that a height-adjustable behind the membrane stiffening element is rotatably mounted on the backrest frame. A disadvantage of this solution is the great effort for the production and installation of the two lateral pivotal connections for this stiffening element, which contribute significantly to increasing the chair costs.
  • a device for lumbar support for an office chair with a backrest of a one-sided membrane-covered backrest frame is known, which is arranged behind the membrane and stored independently of the membrane in the backrest frame. It is both height-adjustable and horizontally stretchable and consists of a central part with two relatively rigid support elements, which have a centrally disposed elastic element, preferably a rubber band with each other are connected and each outside a guide web, which are arranged displaceably in the backrest frame.
  • the front part of the device arranged towards the membrane has a cushioning plate with cushioning cushions, the back part of the device is formed by a plastic plate.
  • the pad plate and the plastic plate are connected to each other by means of a clip connection.
  • This device advantageously supports, on the one hand, the lordosis region of the user of such a chair individually very effectively and, on the other hand, also has sufficient elasticity which results in that the cushion does not press.
  • the disadvantage is the comparatively high manufacturing and assembly costs, in particular for sewing the rubber band, and the associated high price.
  • the invention seeks to avoid the mentioned disadvantages of the known prior art. It is the object of the invention to develop a device for lumbar support in a membrane-covered backrest of a chair, which is simple and inexpensive to manufacture, and still their task, namely an effective spine relief for the prevention of fatigue and tension of the back muscles, very well.
  • the device according to the invention is very simple and inexpensive to produce.
  • the identical support parts can be made in one piece from plastic in automated operations. Expensive handwork, such as sewing the rubber band for the off DE 101 21 207 A1 known solution, deleted.
  • the device for lumbar support is stored independently of the membrane in the backrest frame and both height adjustable and horizontally stretchable over the two spring elements and the polyurethane foam. This guarantees effective relief of the spine.
  • the device for lumbar support is used for an office chair, the backrest frame is covered on both sides with a membrane, wherein the device according to the invention is arranged in an advantageous manner between the two membranes. This gives a chair designed in this way a filigree and aesthetically pleasing impression.
  • the guide bar is arranged to be vertically displaceable in a guide track provided with latching lugs of the seat back frame, and the device for lumbar support is anchored with the aid of a latchable Lordosenschiebers, which is inserted from the outside into the receiving device. This avoids unintentional slipping of the device.
  • Fig. 1 shows a perspective view of an office swivel chair 1 with a built-in device according to the invention for lumbar support 2.
  • the office swivel chair 1 has a backrest frame 3, which is covered on both sides with a membrane 4, not shown in Fig. 1.
  • the device 2 according to the invention is arranged between the two parts of the membrane 4, not shown in Figure 1 and independently of it.
  • Fig. 2 shows a plan view of a part of the device according to the invention for lumbar support 2 and Fig. 3 is a complete plan view of the device 2.
  • the device 2 consists of two identical support elements 5, which are integrally made of plastic.
  • the support elements 5 each have on the outside a lateral guide web 6 and a receiving device 7 for engaging a Lordosenschiebers 8, wherein the guide web 6, a spring element 9 connects, which is connected to a rigid central part 10.
  • the middle part 10 is formed comb-like at its other, the spring element 9 opposite end and therefore has individual webs 11. In the present case, there are two webs 11.
  • the two identical carrier parts 5 are rotated by 180 ° to each other and are arranged so that the webs 11 of their two middle parts 10 engage each other, which can be seen well in Fig. 2.
  • the two carrier elements 5 are held by a PUR foam 13 (FIG. 3) applied on both sides over their middle parts 10.
  • the PU foam element 13 brings some necessary elasticity, on the other hand, the lordosis of the user of the chair is well filled by its shape, which improves the supporting effect of the device according to the invention.
  • Fig. 4 is a partial cross section and in Fig. 5 is a partial longitudinal section of both sides covered with a membrane 4 backrest of the office swivel chair 1 with the built-in device according to the invention for lumbar support 2 is shown.
  • the membrane 4 is secured in the backrest frame 3 of the office chair 1 by means of membrane spring.
  • the device for lumbar support 2 is arranged so that it is not immediately visible and makes the office swivel chair 1 a filigree and aesthetically beautiful impression.
  • the device for lumbar support 2 is mounted independently of the membrane 4 in the backrest frame 3 and both height adjustable and over the two spring elements 9 and the polyurethane foam 13 horizontally stretchable. Thus, an effective relief of the spine of the chair user is guaranteed.
  • the spring elements 9 in the Lordosenschiebern 8 prevent vertical slipping of the lumbar support.
  • the guide web 6 of the support element 5 is arranged in a provided with locking lugs 14 guideway 15 of the backrest frame 3 substantially vertically displaceable.
  • the Lordosenschieber 8 is inserted from the outside into the receiving device 7 of the support elements 5, engages and anchors the device for lumbar support 2.
  • the device 2 is stored in the backrest frame 3.
  • the device according to the invention is easy to manufacture and handle. It is also inexpensive. By using different material pairings an adaptation to different loads can be made possible.

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  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs Characterized By Structure (AREA)
  • Paper (AREA)
  • Massaging Devices (AREA)
  • Surgical Instruments (AREA)

Abstract

The lumbar support device (2) is mounted independently of the membrane in the backrest frame (3) of an office chair (1), and is adjustable in height as well as horizontally expandable. The device has two carrier elements that are identical in construction, and that are turned at 180-degrees toward each other and arranged in such a way that the webs of their two central components interlock. The two carrier elements are connected to each other by means of polyurethane foam applied on both sides over their central components. Each carrier element exhibits on the outside a lateral guide web and a seating fixture to engage a lumbar slide. A spring is attached to the guide web, and is connected to a rigid central component. The other end of the central component lies opposite the spring, is designed in the shape of a comb, and exhibits individual webs.

Description

Technisches GebietTechnical area

Die Erfindung bezieht sich auf das Gebiet der Möbelindustrie. Sie betrifft eine Vorrichtung zur Lordosenabstützung für einen Bürostuhl, dessen Rückenlehne aus einem membranbespannten Rückenlehnenrahmen besteht.The invention relates to the field of furniture industry. It relates to a device for lumbar support for an office chair, the backrest consists of a membrane-covered backrest frame.

Stand der TechnikState of the art

Es ist bekannt, in die Rückenlehnen von Bürostühlen Vorrichtungen zur Lordosenabstützung, wie beispielweise Lordosenkissen, zu integrieren, um einer Ermüdung und Verspannung der Rückenmuskulatur und dadurch hervorgerufenen Schmerzen beim Benutzer des Stuhles vorzubeugen.It is known to integrate in the backrests of office chairs devices for lumbar support, such as Lordosenkissen, to prevent fatigue and tension of the back muscles and thereby caused pain in the user of the chair.

Als Lordose wird die Krümmung der Wirbelsäule nach vorn (Hohlkreuz) bezeichnet. Die genannten Vorrichtungen zur Lordosenabstützung sollen diesen Hohlraum möglichst genau ausfüllen.The lordosis is the curvature of the spine forward (hollow back). The said devices for lumbar support should fill this cavity as accurately as possible.

Dies gelingt bei Stühlen mit einer zusätzlichen Rückenlehnenpolsterung sehr gut, weil eine schaumstoffgepolsterte Rückenlehne es erlaubt, zwischen der Polsterplatte und dem Schaumstoff ein Kunststoffelement anzubringen, welches in der Höhe individuell verschiebbar ist und das Polster an der Stelle nach vorn verwölbt, an der es den Lordosenbereich des jeweiligen Benutzers abstützt. Das Polster selbst sorgt dafür, dass das Kunststoffelement nicht drückt. Schließlich ist das Kunststoffelement ebenso überpolstert wie der Rest der Rückenlehne. Das Polster egalisiert den Aufbau weitgehend.This succeeds in chairs with an additional backrest upholstery very well, because a foam padded backrest allows between the Padding plate and the foam to attach a plastic element, which is individually adjustable in height and the pad at the point bulges forward, where it supports the lumbar region of each user. The pad itself ensures that the plastic element does not press. Finally, the plastic element is overstuffed as well as the rest of the backrest. The pad largely equalizes the structure.

Eine einseitig membranbespannte Rückenlehne ohne Polsteraufbau stellt dagegen keine Überpolsterung des Kunststoffelementes dar. Daher drückt eine hinter oder vor der Membran angeordnete und unabhängig von der Membran im Rückenlehnenrahmen eingelagerte Vorrichtung zur Lordosenabstützung nachteilig unangenehm im Rücken, und zwar auch dann, wenn sie weich oder umpolstert ist. Das versucht man gemäss EP 0 856 269 B1 beispielsweise dadurch zu verhindern, dass ein hinter der Membran höhenverstellbar angeordnetes Versteifungselement drehbar am Rückenlehnenrahmen gelagert wird. Nachteilig bei dieser Lösung ist der große Aufwand für die Herstellung und den Einbau der beiden seitlichen Schwenkverbindungen für dieses Versteifungselement, welche wesentlich zur Erhöhung der Stuhlkosten beitragen.A single-sided membrane-covered backrest without upholstery construction, however, does not constitute an over-upholstery of the plastic element. Therefore, a device for lordosis support placed behind or in front of the membrane and stored independently of the membrane in the backrest frame will disadvantageously be uncomfortable to the back, even if it is soft or padded , This is done according to EP 0 856 269 B1 For example, to prevent that a height-adjustable behind the membrane stiffening element is rotatably mounted on the backrest frame. A disadvantage of this solution is the great effort for the production and installation of the two lateral pivotal connections for this stiffening element, which contribute significantly to increasing the chair costs.

Ist die Lordosenabstützung dagegen direkt in der Membran eingelagert, so bewegt sie sich beim Anlehnen des Benutzers mit der Membran nach hinten. Das hat den Nachteil, so dass sie bezüglich einer Wirbelsäulenentlastung nahezu wirkungslos ist.On the other hand, if the lumbar support is embedded directly in the membrane, it moves backwards when the user leans against the membrane. This has the disadvantage that it is almost ineffective in terms of spinal relief.

Aus DE 101 21 207 A1 ist eine Vorrichtung zur Lordosenabstützung für einen Bürostuhl mit einer Rückenlehne aus einem einseitig membranbespannten Rückenlehnenrahmen bekannt, welche hinter der Membran angeordnet und unabhängig von der Membran im Rückenlehnenrahmen gelagert ist. Sie ist sowohl höhenverstellbar als auch horizontal dehnbar und besteht aus einem Mittelteil mit zwei vergleichsweise starren Trägerelementen, die über ein mittig angeordnetes elastisches Element, vorzugsweise ein Gummiband, miteinander verbunden sind und jeweils außen einen Führungssteg aufweisen, welche im Rückenlehnenrahmen verschiebbar angeordnet sind. Das zur Membran hin angeordnete Vorderteil der Vorrichtung weist eine Polsterplatte mit Polsterkissen auf, das Rückteil der Vorrichtung wird von einer Kunststoffplatte gebildet. Die Polsterplatte und die Kunststoffplatte sind mittels einer Clipverbindung miteinander verbunden. Diese Vorrichtung stützt vorteilhaft einerseits den Lordosenbereich des Benutzers eines derartigen Stuhles individuell sehr wirkungsvoll und verfügt andererseits aber auch über eine ausreichende Elastizität, welche dazu führt, dass das Kissen nicht drückt. Nachteilig ist aber der vergleichsweise hohe Herstellungs- und Montageaufwand, insbesondere zum Nähen des Gummibandes, und der damit verbundene hohe Preis.Out DE 101 21 207 A1 a device for lumbar support for an office chair with a backrest of a one-sided membrane-covered backrest frame is known, which is arranged behind the membrane and stored independently of the membrane in the backrest frame. It is both height-adjustable and horizontally stretchable and consists of a central part with two relatively rigid support elements, which have a centrally disposed elastic element, preferably a rubber band with each other are connected and each outside a guide web, which are arranged displaceably in the backrest frame. The front part of the device arranged towards the membrane has a cushioning plate with cushioning cushions, the back part of the device is formed by a plastic plate. The pad plate and the plastic plate are connected to each other by means of a clip connection. This device advantageously supports, on the one hand, the lordosis region of the user of such a chair individually very effectively and, on the other hand, also has sufficient elasticity which results in that the cushion does not press. However, the disadvantage is the comparatively high manufacturing and assembly costs, in particular for sewing the rubber band, and the associated high price.

Darstellung der ErfindungPresentation of the invention

Die Erfindung versucht, die genannten Nachteile des bekannten Standes der Technik zu vermeiden. Ihr liegt die Aufgabe zugrunde, eine Vorrichtung zur Lordosenabstützung bei einer membranbespannten Rückenlehne eines Stuhles zu entwickeln, welche einfach und preiswert herzustellen ist, und trotzdem ihrer Aufgabe, nämlich einer effektiven Wirbelsäulenentlastung zur Vorbeugung von Ermüdung und Verspannungen der Rückenmuskulatur, sehr gut gerecht wird.The invention seeks to avoid the mentioned disadvantages of the known prior art. It is the object of the invention to develop a device for lumbar support in a membrane-covered backrest of a chair, which is simple and inexpensive to manufacture, and still their task, namely an effective spine relief for the prevention of fatigue and tension of the back muscles, very well.

Erfindungsgemäß wird dies bei einer Vorrichtung gemäss Oberbegriff des Patentanspruches 1 dadurch erreicht, dass die Vorrichtung aus folgenden Teilen besteht

  1. a) zwei baugleichen Trägerelementen, welche jeweils außen einen seitlichen Führungssteg und eine Aufnahmevorrichtung zu Einrasten eines Lordosenschiebers aufweisen, wobei sich an den Führungssteg ein Federelement anschließt, welches mit einem starren Mittelteil verbunden ist und wobei das andere Ende des Mittelteiles kammartig ausgebildet ist und einzelne Stege aufweist, wobei
  2. b) die beiden Trägerelemente um 180 ° zueinander gedreht und so angeordnet sind, dass die Stege ihrer beiden Mittelteile ineinander greifen und wobei
  3. c) die beiden Trägerelemente mittels eines über ihre Mittelteile beidseitig aufgebrachten PUR-Schaums miteinander verbunden sind.
According to the invention this is achieved in a device according to the preamble of claim 1, characterized in that the device consists of the following parts
  1. a) two identical support elements, which each have a lateral outside guide web and a receiving device to engage a Lordosenschiebers, wherein the guide web is followed by a spring element which is connected to a rigid central part and wherein the other end of the central part is comb-like and individual webs having,
  2. b) the two support elements are rotated by 180 ° to each other and arranged so that the webs of their two middle parts engage with each other and wherein
  3. c) the two carrier elements are connected to each other by means of a PUR foam applied on both sides over their middle parts.

Die Vorteile der Erfindung bestehen darin, dass die erfindungsgemäße Vorrichtung sehr einfach und preiswert herstellbar ist. Die baugleichen Trägerteile können einstückig aus Kunststoff in automatisierten Arbeitsgängen hergestellt werden. Teure Handarbeit, wie beispielsweise das Nähen des Gummibandes für die aus DE 101 21 207 A1 bekannte Lösung, entfällt. Die Vorrichtung zur Lordosenabstützung ist unabhängig von der Membran im Rückenlehnenrahmen gelagert und sowohl höhenverstellbar als auch über die zwei Federelemente und den PUR-Schaum horizontal dehnbar. Damit ist eine wirkungsvolle Entlastung der Wirbelsäule garantiert.The advantages of the invention are that the device according to the invention is very simple and inexpensive to produce. The identical support parts can be made in one piece from plastic in automated operations. Expensive handwork, such as sewing the rubber band for the off DE 101 21 207 A1 known solution, deleted. The device for lumbar support is stored independently of the membrane in the backrest frame and both height adjustable and horizontally stretchable over the two spring elements and the polyurethane foam. This guarantees effective relief of the spine.

Es ist zweckmäßig, wenn die Vorrichtung zur Lordosenabstützung für einen Bürostuhl eingesetzt wird, dessen Rückenlehnenrahmen beidseitig mit einer Membran bespannt ist, wobei die erfindungsgemäße Vorrichtung in vorteilhafter Weise zwischen den beiden Membranen angeordnet ist. Dadurch vermittelt ein derartig gestalteter Stuhl einen filigranen und ästhetisch schönen Eindruck.It is useful if the device for lumbar support is used for an office chair, the backrest frame is covered on both sides with a membrane, wherein the device according to the invention is arranged in an advantageous manner between the two membranes. This gives a chair designed in this way a filigree and aesthetically pleasing impression.

Weiterhin ist es zweckmäßig, wenn der Führungssteg in einer mit Rastnasen versehenen Führungsbahn des Rückenlehnenrahmens vertikal verschiebbar angeordnet ist, und die Vorrichtung zur Lordosenabstützung mit Hilfe eines einrastbaren Lordosenschiebers, welcher von außen in die Aufnahmevorrichtung eingeschoben wird, verankert wird. Damit wird ein unbeabsichtigtes Verrutschen der Vorrichtung vermieden.Furthermore, it is expedient if the guide bar is arranged to be vertically displaceable in a guide track provided with latching lugs of the seat back frame, and the device for lumbar support is anchored with the aid of a latchable Lordosenschiebers, which is inserted from the outside into the receiving device. This avoids unintentional slipping of the device.

Außerdem ist es vorteilhaft, wenn unterschiedliche Materialpaarungen verwendet werden, weil damit eine Anpassung an die vorgesehenen Belastungen ermöglicht wird.Moreover, it is advantageous if different material pairings are used, because it allows adaptation to the intended loads.

Kurze Beschreibung der ZeichnungShort description of the drawing

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Es zeigen:

Fig. 1
eine perspektivische Ansicht eines Bürodrehstuhles mit einer eingebauten erfindungsgemäßen Vorrichtung zur Lordosenabstützung;
Fig. 2
eine Draufsicht der beiden zusammengefügten Trägerelemente einer erfindungsgemäßen Vorrichtung zur Lordosenabstützung;
Fig. 3
eine Draufsicht einer kompletten erfindungsgemäßen Vorrichtung zur Lordosenabstützung;
Fig. 4
einen Teilquerschnitt der beidseitig membranbespannten Rückenlehne des Bürodrehstuhles mit der eingebauten erfindungsgemäßen Vorrichtung zur Lordosenabstützung und
Fig. 5
einen Teillängsschnitt der beidseitig membranbespannten Rückenlehne des Bürodrehstuhles mit der eingebauten erfindungsgemäßen Vorrichtung zur Lordosenabstützung.
In the drawing, an embodiment of the invention is shown. Show it:
Fig. 1
a perspective view of an office swivel chair with a built-in device according to the invention for lumbar support;
Fig. 2
a plan view of the two assembled support elements of a device according to the invention for lumbar support;
Fig. 3
a plan view of a complete device according to the invention for lumbar support;
Fig. 4
a partial cross section of the double-membrane-covered backrest of the office swivel chair with the built-in device according to the invention for lumbar support and
Fig. 5
a partial longitudinal section of the double-sided membrane-covered backrest of the office swivel chair with the built-in device according to the invention for lumbar support.

Es sind nur die für das Verständnis der Erfindung wesentlichen Elemente gezeigt. Gleiche Elemente sind mit den gleichen Bezugszeichen versehen.Only the elements essential to the understanding of the invention are shown. The same elements are provided with the same reference numerals.

Wege zur Ausführung der ErfindungWays to carry out the invention

Nachfolgend wird die Erfindung anhand eines Ausführungsbeispieles und der Figuren 1 bis 5 näher erläutert.The invention will be explained in more detail with reference to an embodiment and the figures 1 to 5.

Fig. 1 zeigt eine perspektivische Ansicht eines Bürodrehstuhles 1 mit einer eingebauten erfindungsgemäßen Vorrichtung zur Lordosenabstützung 2. Der Bürodrehstuhl 1 hat einen Rückenlehnenrahmen 3, welcher beidseitig mit einer in Fig. 1 nicht dargestellten Membran 4 bespannt ist. Die erfindungsgemäße Vorrichtung 2 ist dabei zwischen den beiden Teilen der in Fig.1 nicht dargestellten Membran 4 und unabhängig von ihr angeordnet.Fig. 1 shows a perspective view of an office swivel chair 1 with a built-in device according to the invention for lumbar support 2. The office swivel chair 1 has a backrest frame 3, which is covered on both sides with a membrane 4, not shown in Fig. 1. The device 2 according to the invention is arranged between the two parts of the membrane 4, not shown in Figure 1 and independently of it.

Fig. 2 zeigt eine Draufsicht eines Teiles der erfindungsgemäßen Vorrichtung zur Lordosenabstützung 2 und Fig. 3 eine komplette Draufsicht der Vorrichtung 2. Die Vorrichtung 2 besteht aus zwei baugleichen Trägerelementen 5, welche einstückig aus Kunststoff hergestellt sind. Die Trägerelemente 5 weisen jeweils außen einen seitlichen Führungssteg 6 und eine Aufnahmevorrichtung 7 zum Einrasten eines Lordosenschiebers 8 auf, wobei sich an den Führungssteg 6 ein Federelement 9 anschließt, welches mit einem starren Mittelteil 10 verbunden ist. Das Mittelteil 10 ist an seinem anderen, dem Federelement 9 gegenüberliegenden Ende kammartig ausgebildet und weist daher einzelne Stege 11 auf. Im vorliegenden Falle sind es jeweils zwei Stege 11. Außerdem sind im Mittelteil 10 mehrere Öffnungen 12, im vorliegenden Ausführungsbeispiel 3 Stück, angeordnet, was sich günstig auf die Stabilität und Elastizität der Trägerelemente 5 auswirken.Fig. 2 shows a plan view of a part of the device according to the invention for lumbar support 2 and Fig. 3 is a complete plan view of the device 2. The device 2 consists of two identical support elements 5, which are integrally made of plastic. The support elements 5 each have on the outside a lateral guide web 6 and a receiving device 7 for engaging a Lordosenschiebers 8, wherein the guide web 6, a spring element 9 connects, which is connected to a rigid central part 10. The middle part 10 is formed comb-like at its other, the spring element 9 opposite end and therefore has individual webs 11. In the present case, there are two webs 11. In addition, a plurality of openings 12, in the present embodiment 3 pieces, arranged in the middle part 10, which have a favorable effect on the stability and elasticity of the support elements 5.

Die beiden baugleichen Trägerteile 5 sind um 180 ° zueinander gedreht und so angeordnet sind, dass die Stege 11 ihrer beiden Mittelteile 10 ineinander greifen, was gut in Fig. 2 zu erkennen ist. Die beiden Trägerelemente 5 werden über einen über ihre Mittelteile 10 beidseitig aufgebrachten PUR-Schaum 13 (Fig. 3) gehalten. Das PUR-Schaum-Element 13 bringt einerseits eine gewisse notwendige Elastizität, anderseits wird durch seine Form die Lordose des Benutzers des Stuhles gut ausgefüllt, was die Stützwirkung der erfindungsgemäßen Vorrichtung verbessert.The two identical carrier parts 5 are rotated by 180 ° to each other and are arranged so that the webs 11 of their two middle parts 10 engage each other, which can be seen well in Fig. 2. The two carrier elements 5 are held by a PUR foam 13 (FIG. 3) applied on both sides over their middle parts 10. The PU foam element 13 on the one hand brings some necessary elasticity, on the other hand, the lordosis of the user of the chair is well filled by its shape, which improves the supporting effect of the device according to the invention.

In Fig. 4 ist ein Teilquerschnitt und in Fig. 5 ist ein Teillängsschnitt der beidseitig mit einer Membran 4 bespannten Rückenlehne des Bürodrehstuhles 1 mit der eingebauten erfindungsgemäßen Vorrichtung zur Lordosenabstützung 2 dargestellt. Wie im oberen Teil von Fig. 4 gut zu erkennen ist, ist die Membran 4 im Rückenlehnenrahmen 3 des Bürostuhles 1 mittels Membrankeder befestigt. Zwischen der vorderen und hinteren Membran 4 ist die Vorrichtung zur Lordosenabstützung 2 angeordnet, so dass diese nicht sofort sichtbar ist und der Bürodrehstuhl 1 einen filigranen und ästhetisch schönen Eindruck macht. Die Vorrichtung zur Lordosenabstützung 2 ist unabhängig von der Membran 4 im Rückenlehnenrahmen 3 gelagert und sowohl höhenverstellbar als auch über die zwei Federelemente 9 und den PUR-Schaum 13 horizontal dehnbar. Damit ist eine wirkungsvolle Entlastung der Wirbelsäule des Stuhlbenutzers garantiert. Die Federelemente 9 in den Lordosenschiebern 8 verhindern ein vertikales Verrutschen der Lordosenabstützung.In Fig. 4 is a partial cross section and in Fig. 5 is a partial longitudinal section of both sides covered with a membrane 4 backrest of the office swivel chair 1 with the built-in device according to the invention for lumbar support 2 is shown. As can be clearly seen in the upper part of Fig. 4, the membrane 4 is secured in the backrest frame 3 of the office chair 1 by means of membrane spring. Between the front and rear membrane 4, the device for lumbar support 2 is arranged so that it is not immediately visible and makes the office swivel chair 1 a filigree and aesthetically beautiful impression. The device for lumbar support 2 is mounted independently of the membrane 4 in the backrest frame 3 and both height adjustable and over the two spring elements 9 and the polyurethane foam 13 horizontally stretchable. Thus, an effective relief of the spine of the chair user is guaranteed. The spring elements 9 in the Lordosenschiebern 8 prevent vertical slipping of the lumbar support.

Der Führungssteg 6 des Trägerelementes 5 ist in einer mit Rastnasen 14 versehenen Führungsbahn 15 des Rückenlehnenrahmens 3 im wesentlichen vertikal verschiebbar angeordnet. Der Lordosenschieber 8 wird von außen in die Aufnahmevorrichtung 7 der Trägerelemente 5 eingeschoben, rastet ein und verankert die Vorrichtung zur Lordosenabstützung 2. Damit wird die Vorrichtung 2 im Rückenlehnenrahmen 3 gelagert.The guide web 6 of the support element 5 is arranged in a provided with locking lugs 14 guideway 15 of the backrest frame 3 substantially vertically displaceable. The Lordosenschieber 8 is inserted from the outside into the receiving device 7 of the support elements 5, engages and anchors the device for lumbar support 2. Thus, the device 2 is stored in the backrest frame 3.

Die erfindungsgemäße Vorrichtung ist einfach herstell- und handhabbar. Sie ist zudem preiswert. Durch Verwendung unterschiedliche Materialpaarungen kann eine Anpassung an unterschiedliche Belastungen ermöglicht werden.The device according to the invention is easy to manufacture and handle. It is also inexpensive. By using different material pairings an adaptation to different loads can be made possible.

Selbstverständlich ist die Erfindung nicht auf das beschriebene Ausführungsbeispiel beschränkt.Of course, the invention is not limited to the embodiment described.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Bürostuhloffice chair
22
Vorrichtung zur LordosenabstützungLumbar support device
33
RückenlehnenrahmenBackrest frame
44
Membranmembrane
55
Trägerelementsupport element
66
Führungsstegguide web
77
Aufnahmevorrichtungcradle
88th
LordosenschieberLordosenschieber
99
Federelementspring element
1010
Mittelteilmidsection
1111
Stegweb
1212
Öffnungopening
1313
PUR-Schaum-ElementPUR foam-Element
1414
Rastnaselocking lug
1515
Führungsbahnguideway

Claims (3)

Vorrichtung zur Lordosenabstützung (2) für einen Bürostuhl (1) mit einer Rückenlehne, welche aus einem mit einer Membran (4) bespannten Rückenlehnenrahmen (3) besteht, wobei die Vorrichtung (2) unabhängig von der Membran (4) im Rückenlehnerahmen gelagert ist und sowohl höhenverstellbar als auch horizontal dehnbar ist, dadurch gekennzeichnet, dass sie aus folgenden Teilen besteht a) zwei baugleichen Trägerelementen (5), welche jeweils außen einen seitlichen Führungssteg (6) und eine Aufnahmevorrichtung (7) zum Einrasten eines Lordosenschiebers (8) aufweisen, wobei sich an den Führungssteg (6) ein Federelement (9) anschließt, welches mit einem starren Mittelteil (10) verbunden ist und wobei das dem Federelement (9) gegenüberliegende andere Ende des Mittelteiles (10) kammartig ausgebildet ist und einzelne Stege (11) aufweist, und wobei b) die beiden baugleichen Trägerelemente (5) um 180 ° zueinander gedreht und so angeordnet sind, dass die Stege (11) ihrer beiden Mittelteile (10) ineinander greifen und wobei c) die beiden baugleichen Trägerelemente (5) mittels eines über ihre Mittelteile (10) beidseitig aufgebrachten PUR-Schaum-Elementes (13) miteinander verbunden sind. Device for lordosis support (2) for an office chair (1) with a backrest consisting of a backrest frame (3) covered with a membrane (4), the device (2) being mounted in the backrest frame independently of the membrane (4) and is both height adjustable and horizontally stretchable, characterized in that it consists of the following parts a) two identical support elements (5), each having a lateral guide web (6) and a receiving device (7) for engaging a Lordosenschiebers (8), wherein the guide web (6) is followed by a spring element (9), which with a rigid central part (10) is connected and wherein the spring element (9) opposite the other end of the central part (10) is comb-like and has individual webs (11), and wherein b) the two identical support elements (5) are rotated by 180 ° to each other and arranged so that the webs (11) of its two middle parts (10) engage with each other and wherein c) the two identical support elements (5) by means of a center portions (10) on both sides applied PUR foam element (13) are interconnected. Vorrichtung zur Lordosenabstützung (2) nach Anspruch 1, dadurch gekennzeichnet, dass der Führungssteg in einer mit Rastnasen versehenen Führungsbahn des Rückenlehnenrahmens vertikal verschiebbar angeordnet ist, und die Vorrichtung zur Lordosenabstützung mit Hilfe eines einrastbaren Lordosenschiebers, welcher von außen in die Aufnahmevorrichtung eingeschoben wird, verankert wird.Lumbar support device (2) according to claim 1, characterized in that the guide bar is arranged vertically displaceable in a guide track provided with latching lugs of the seat back frame, and the device for lumbar support by means of a latchable Lordosenschiebers, which is inserted from the outside into the receiving device, anchored becomes. Vorrichtung zur Lordosenabstützung (2) nach Anspruch 1, dadurch gekennzeichnet, dass diese für einen Bürostuhl (1) eingesetzt wird, dessen Rückenlehnenrahmen (3) beidseitig mit der Membran (4) bespannt ist, wobei die Vorrichtung (2) zwischen den beiden Membranen (4) angeordnet ist.Lumbar support device (2) according to claim 1, characterized in that it is used for an office chair (1) whose backrest frame (3) is covered on both sides with the membrane (4), the device (2) between the two membranes (2). 4) is arranged.
EP07004503A 2006-03-20 2007-03-06 Device for lumbar support Not-in-force EP1836932B1 (en)

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DE102006012618A DE102006012618A1 (en) 2006-03-20 2006-03-20 Lumbar support device

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US (1) US7344194B2 (en)
EP (1) EP1836932B1 (en)
AT (1) ATE439780T1 (en)
AU (1) AU2007201189A1 (en)
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DE (2) DE102006012618A1 (en)

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Also Published As

Publication number Publication date
EP1836932B1 (en) 2009-08-19
CA2582021A1 (en) 2007-09-20
AU2007201189A1 (en) 2007-10-04
DE502007001323D1 (en) 2009-10-01
US7344194B2 (en) 2008-03-18
DE102006012618A1 (en) 2007-09-27
US20070216208A1 (en) 2007-09-20
ATE439780T1 (en) 2009-09-15
EP1836932A3 (en) 2008-05-28

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