EP1447029B1 - Backrest - Google Patents

Backrest Download PDF

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Publication number
EP1447029B1
EP1447029B1 EP03003522A EP03003522A EP1447029B1 EP 1447029 B1 EP1447029 B1 EP 1447029B1 EP 03003522 A EP03003522 A EP 03003522A EP 03003522 A EP03003522 A EP 03003522A EP 1447029 B1 EP1447029 B1 EP 1447029B1
Authority
EP
European Patent Office
Prior art keywords
backrest
frame
support
transverse web
side parts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03003522A
Other languages
German (de)
French (fr)
Other versions
EP1447029A1 (en
Inventor
Klaus-Peter Grasse
Manfred Schlegel
Mathias Seiler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sedus Stoll AG
Original Assignee
Sedus Stoll AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sedus Stoll AG filed Critical Sedus Stoll AG
Priority to AT03003522T priority Critical patent/ATE336187T1/en
Priority to EP03003522A priority patent/EP1447029B1/en
Priority to DE50304649T priority patent/DE50304649D1/en
Priority to ES03003522T priority patent/ES2269841T3/en
Priority to CA002455046A priority patent/CA2455046A1/en
Priority to US10/759,195 priority patent/US7147288B2/en
Priority to MXPA04000841A priority patent/MXPA04000841A/en
Priority to AU2004200278A priority patent/AU2004200278B2/en
Priority to NZ530857A priority patent/NZ530857A/en
Priority to CN200410004183.0A priority patent/CN100506116C/en
Priority to CN200420003810.4U priority patent/CN2749372Y/en
Publication of EP1447029A1 publication Critical patent/EP1447029A1/en
Priority to HK05101035.0A priority patent/HK1068526A1/en
Application granted granted Critical
Publication of EP1447029B1 publication Critical patent/EP1447029B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C5/00—Chairs of special materials
    • A47C5/12—Chairs of special materials of plastics, with or without reinforcement
    • 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
    • A47C7/38—Support for the head or the back for the head

Definitions

  • the invention relates to the field of seating, in particular a backrest for an office chair, in which in a frame, a membrane is clamped.
  • a chair of the kind described is e.g. from EP 0308538 A known.
  • the cardanic bearing is achieved in that the backrest has a spherical segment-shaped formation, which is mounted in a second spherical segment-shaped formation on the backrest support.
  • the center around which the backrest can move lies on the upholstery surface.
  • Laterally and above and below the universal joint spring elements between backrest and backrest support are provided, e.g. Elastic polyester elements that exert spring forces both perpendicular and parallel to the backrest surface.
  • Another chair with gimbaled backrest is known from EP 0935934 A.
  • the gimbal bearing is achieved there by means of a circular cylindrical rubber-elastic element, on whose two end faces in each case a steel plate is vulcanized, which is connected to the backrest or the backrest support by screws. The user can thus move the back against the spring forces of the rubber-elastic element.
  • the backrest support can still be pressed against a return spring to the rear.
  • the upholstery On its user interface, the upholstery is basically rigid and kinked in the area of the rubber mount.
  • this known chair has the advantage that the gimbal comprises fewer items, and thus is less expensive to produce. Due to the conventional design of the user interface of the backrest cushion but no optimal support of the user's back is achieved. Furthermore, the articulation of the backrest support to the chair column and the connection to a return spring is very expensive and thus cost-ineffective. Finally, it is also disadvantageous that the rubber-elastic bearing offers no tear protection: if the vulcanized to the rubber-elastic element panels should solve, the backrest falls from the backrest carrier.
  • the backrest is designed as a frame with a membrane spanned therein.
  • the frame consists of two substantially vertically extending side parts, and an upper and a lower, the two side parts connecting crosspiece.
  • At the lower crosspiece of the frame is suspended by a dorsokine perennial flexible joint on the upper part of a backrest support, which consists of aluminum and is hinged with its fork-shaped lower part of the tilt mechanism.
  • this chair offers a very high level of seating comfort, it is also relatively expensive to manufacture, and can also be further optimized with regard to the dorsokinetic support of the lumbar vertebral lordosis.
  • a chair is known from US 5,810,438 A, in which the back part, the seat part and the two armrests are integrally connected.
  • a spring member is provided between the seat and back, which is also integrally connected to the seat and backrest.
  • the known chair is an injection molded part, and is manufactured by gas injection technique (GIT).
  • the known chair has remarkable manufacturing advantages because the number of components and assembly steps are minimized.
  • he has disadvantages in terms of seating comfort, because the backrest is actually suspended from the armrests, and, especially when the central spring member is provided so that only very limited meets the requirements of the user in terms of elastic support of the back.
  • this component is an injection molded part made of a glass fiber reinforced polyamide plastic, preferably a Polyarylamid, and produced by gas injection technique (GIT), which can be produced largely hollow items.
  • the backrest on the one hand can unfold the membrane optimal support forces for the back of the user, but on the other hand elegantly and technically inexpensive and stable causes a cardano-elastic connection between the back and backrest support.
  • the invention also makes it possible, the backrest together with backrest support as a visible part, ie without special panel form, which not only reduces the number of items and thus the manufacturing costs, but also shapes the design and realized a high recognition value.
  • the number of structural elements of the backrest according to the invention is reduced to a minimum, and thus expresses the manufacturing effort. Due to the largely hollow plastic parts a very low weight is achieved. However, the backrest according to the invention still has a whole a particularly high degree of stability, because a tearing off the back of the wearer under the influence of force is no longer possible due to the one-piece design. Furthermore, the backrest according to the invention has a very high rigidity and resistance to mechanical stress in the selected dimensions and the selected plastic.
  • the backrest according to the invention has the further advantage that ergonomically desirable elastic support forces for the user's back are also contributed by the backrest support, while the aluminum support is rigid.
  • a backrest according to the invention comprising the frame 1, the backrest support 6, and the neck support 15.
  • the frame 1 consists of the left-hand side part 2 and the right-hand side part 3. These two side parts 2, 3 are connected to one another via the lower transverse web 4 and the upper transverse web 5.
  • the side parts 2, 3 have, on the outside, a groove 26 into which a membrane (not shown) made of an elastic fabric is clipped with its side edges bordered with keder.
  • the backrest support 6 comprises the left leg 7 and the right leg 8, which converge fork-shaped in the connecting piece 18.
  • the connecting piece 18 runs smoothly and without transition into the lower transverse web 4.
  • the legs In front, the legs have 7.8 bearing blocks 9.10, on which the rear part of the (not shown) seat plate is stored. At the very front, the legs 7.8 recesses 22, in which metallic fittings 11,12 are used and tightened. By means of these fittings 11,12 of the backrest support 6 is hinged to the (not shown) inclination mechanism of the chair.
  • a tilting mechanism for example, the mechanism described in DE 196 40 564 A can be used with synchronous control of seat and backrest.
  • a metallic fitting 13 with a bearing 14 for the neck support 15 is fastened by means of screws.
  • the neck support 15 is pivotally mounted on the sleeve 19 via the complementary bearing part 23.
  • the pivotability to a predetermined extent is effected by the sliding block 24, which can move in the suitably shaped inner part of the bearing 23.
  • the screw 27 cup springs 25 By means of standing under the action of the screw 27 cup springs 25, a friction force is generated on the bearing 23, which allows the neck support can indeed be pivoted, but then fixed in a desired position.
  • the neck support 15 can be adjusted by moving the rod 20 in the sleeve 19.
  • the (not shown) head pad is attached.
  • the plastic moldings of the backrest are largely hollow. Only in the middle part of the upper crossbar 5 and in the lower parts of the two legs 7,8 of the backrest support 6, the molding material is compact. This is useful so that the screws for the fittings 11,12 and 13 have a firm grip.
  • the vcm user-generated leaning force is not only taken up by the backrest frame, but also by the backrest support integrally molded. This increases the dorsokinetic support function of the back in an advantageous manner.
  • the plastic compound used is a glass fiber reinforced thermoplastic.
  • Resin based on polyarylamide preferably under the trademark IXEF 1022 or 1032 from Solvay S.A. distributed material.
  • the moldings are produced by gas injection technique (GIT), wherein the molten molding material is displaced by an under high pressure in the cavity of the injection mold injected inert gas, preferably nitrogen, to the mold wall.
  • GIT gas injection technique
  • the backrest according to the invention the task-related advantages in full: it causes excellent seating comfort through optimal support of the back, is compared to the prior art, significantly reduced effort to produce, transport and assemble, and offers by industrial design produces a high level of aesthetics and design.

Landscapes

  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

The back-rest for a chair comprises a frame (1) and a frame holder (6) which are producible together as a one-piece item. An independent claim is also included for a method for producing the proposed back-rest.

Description

TECHNISCHES GEBIETTECHNICAL AREA

Die Erfindung betrifft das Gebiet der Sitzmöbel, insbesondere eine Rückenlehne für einen Büro-Stuhl, bei welchem in einem Rahmen eine Membran aufgespannt ist.The invention relates to the field of seating, in particular a backrest for an office chair, in which in a frame, a membrane is clamped.

STAND DER TECHNIKSTATE OF THE ART

Es ist bekannt, bei Bürostühlen die Lehne an den Lehnenträger derart anzubinden, dass sie möglichst allen Bewegungen des Rückens des Benutzers zu folgen vermag. Technisch heißt das, dass die Lehne kardanisch gelagert, also um die drei Raumachsen beweglich ist. Damit kann sie sagittalen Bewegungen des Rückens , also Bewegungen um eine Horizontalachse parallel zum Körper, aber auch Torsionsbewegungen und Transversalbewegungen, also Bewegungen um die Vertikalachse bzw. um eine Horizontalachse senkrecht zum Körper, folgen. Derartige kombinierte Oberkörperbewegungen in drei Richtungen kommen in der Praxis sehr häufig vor, zum Beispiel beim Griff seitlich unten in die Schublade eines Schreibtisches, oder beim Hinwenden zu einem Gesprächspartner. Kardanische Lager für Lehnen bei Stühlen werden auch als "dorsokinetisch flexible Gelenke" bezeichnet.It is known in office chairs to connect the backrest to the backrest support in such a way that it is able to follow as far as possible all movements of the back of the user. Technically, this means that the back is gimbal-mounted, so it is movable around the three spatial axes. Thus, it can follow sagittal movements of the back, ie movements about a horizontal axis parallel to the body, but also torsional and transverse movements, ie movements about the vertical axis or about a horizontal axis perpendicular to the body. Such combined upper body movements in three directions are very common in practice, for example, the handle side down in the drawer of a desk, or when turning to a conversation partner. Gimbals for chairs in chairs are also called "dorsokinetically flexible joints".

Ein Stuhl der geschilderten Art ist z.B. aus EP 0308538 A bekannt. Bei diesem bekannten Stuhl wird die kardanische Lagerung dadurch erreicht, dass die Lehne eine kugelsegmentförmige Ausformung aufweist, die in einer zweiten kugelsegmentförmigen Ausformung am Lehnenträger gelagert ist. Der Mittelpunkt, um den sich die Lehne bewegen kann, liegt an der Polsteroberfläche. Seitlich und oberhalb und unterhalb des Kardangelenkes sind Federelemente zwischen Lehne und Lehnenträger vorgesehen, z.B. elastische Polyester-Elemente, die Federkräfte sowohl senkrecht als auch parallel zur Lehnenfläche ausüben.A chair of the kind described is e.g. from EP 0308538 A known. In this known chair, the cardanic bearing is achieved in that the backrest has a spherical segment-shaped formation, which is mounted in a second spherical segment-shaped formation on the backrest support. The center around which the backrest can move lies on the upholstery surface. Laterally and above and below the universal joint spring elements between backrest and backrest support are provided, e.g. Elastic polyester elements that exert spring forces both perpendicular and parallel to the backrest surface.

Dieser bekannte Stuhl bietet zwar einen hervorragenden Sitzkomfort, bedingt aber einen gewissen Aufwand bei seiner Herstellung.Although this known chair offers excellent seating comfort, but requires a certain effort in its manufacture.

Ein anderer Stuhl mit kardanisch gelagerter Lehne ist bekannt aus EP 0935934 A. Die kardanische Lagerung wird dort mittels eines kreiszylindrischen gummielastischen Elementes erreicht, an dessen zwei Stirnseiten jeweils eine Stahlplatte anvulkanisiert ist, die mit der Lehne bzw. dem Lehnenträger durch Schrauben verbunden ist. Der Benutzer kann damit die Lehne gegen die Federkräfte des gummielastischen Elementes bewegen. Zusätzlich kann noch der Lehnenträger gegen eine Rückholfeder nach hinten gedrückt werden. An seiner Benutzeroberfläche ist das Polster prinzipiell steif ausgeführt und im Bereich des Gummilagers geknickt.Another chair with gimbaled backrest is known from EP 0935934 A. The gimbal bearing is achieved there by means of a circular cylindrical rubber-elastic element, on whose two end faces in each case a steel plate is vulcanized, which is connected to the backrest or the backrest support by screws. The user can thus move the back against the spring forces of the rubber-elastic element. In addition, the backrest support can still be pressed against a return spring to the rear. On its user interface, the upholstery is basically rigid and kinked in the area of the rubber mount.

Dieser bekannte Stuhl weist zwar den Vorteil auf, dass das Kardanlager weniger Einzelteile umfasst, und damit kostengünstiger herstellbar ist. Durch die konventionelle Gestaltung der Benutzeroberfläche des Lehnenpolsters wird aber keine optimale Stützung des Rückens des Benutzers erzielt. Ferner ist auch die Anlenkung des Lehnenträgers an der Stuhlsäule und die Anbindung an eine Rückholfeder sehr aufwendig und damit kostenungünstig. Schließlich ist es auch nachteilig, dass das gummielastische Lager keinen Abreißschutz bietet: wenn sich die an das gummielastische Element anvulkanisierten Platten lösen sollten, fällt die Lehne vom Lehnenträger ab.Although this known chair has the advantage that the gimbal comprises fewer items, and thus is less expensive to produce. Due to the conventional design of the user interface of the backrest cushion but no optimal support of the user's back is achieved. Furthermore, the articulation of the backrest support to the chair column and the connection to a return spring is very expensive and thus cost-ineffective. Finally, it is also disadvantageous that the rubber-elastic bearing offers no tear protection: if the vulcanized to the rubber-elastic element panels should solve, the backrest falls from the backrest carrier.

Ein anderer Stuhl der genannten Art ist bekannt aus DE 100 48 779 A1 (= EP 1 192 882 A2): Bei diesem Stuhl ist die Rückenlehne als Rahmen mit einer darin aufgespannten Membran ausgebildet. Der Rahmen besteht aus zwei im wesentlichen vertikal verlaufenden Seitenteilen, und einem oberen und einem unteren, die beiden Seitenteile verbindenden Quersteg. Am unteren Quersteg ist der Rahmen über ein dorsokinetisch flexibles Gelenk am oberen Teil eines Lehnenträgers aufgehängt, der aus Aluminium besteht und mit seinem gabelförmigen unteren Teil an der Neigungsmechanik angelenkt ist.Another chair of the type mentioned is known from DE 100 48 779 A1 (= EP 1 192 882 A2): In this chair, the backrest is designed as a frame with a membrane spanned therein. The frame consists of two substantially vertically extending side parts, and an upper and a lower, the two side parts connecting crosspiece. At the lower crosspiece of the frame is suspended by a dorsokinetisch flexible joint on the upper part of a backrest support, which consists of aluminum and is hinged with its fork-shaped lower part of the tilt mechanism.

Obwohl dieser Stuhl ein sehr hohes Maß an Sitzkomfort bietet, ist auch er herstellungstechnisch relativ aufwendig, und kann auch hinsichtlich der dorsokinetischen Abstützung der Lendenwirbel-Lordose noch weiter optimiert werden.Although this chair offers a very high level of seating comfort, it is also relatively expensive to manufacture, and can also be further optimized with regard to the dorsokinetic support of the lumbar vertebral lordosis.

Schließlich ist noch ein Stuhl aus US 5,810,438 A bekannt, bei dem das Rückenteil, das Sitzteil und die beiden Armlehnen einstückig miteinander verbunden sind. Als Option ist zwischen Sitz und Rückenlehne ein Federteil vorgesehen, das gleichfalls einstückig mit Sitz und Lehne verbunden ist. Der bekannte Stuhl ist ein Spritzgussformteil, und wird durch Gas-Injektionstechnik (GIT) hergestellt.Finally, a chair is known from US 5,810,438 A, in which the back part, the seat part and the two armrests are integrally connected. As an option, a spring member is provided between the seat and back, which is also integrally connected to the seat and backrest. The known chair is an injection molded part, and is manufactured by gas injection technique (GIT).

Der bekannte Stuhl hat bemerkenswerte Vorteile bei der Herstellung, weil die Zahl der Komponenten und die Montageschritte auf ein Minimum reduziert sind. Er hat jedoch Nachteile bezüglich des Sitzkomforts, weil die Rückenlehne faktisch an den Armlehnen aufgehängt ist, und, erst recht wenn das mittlere Federteil vorgesehen ist, damit nur sehr beschränkt den Anforderungen des Benutzers hinsichtlich einer elastischen Stützung des Rückens genügt.The known chair has remarkable manufacturing advantages because the number of components and assembly steps are minimized. However, he has disadvantages in terms of seating comfort, because the backrest is actually suspended from the armrests, and, especially when the central spring member is provided so that only very limited meets the requirements of the user in terms of elastic support of the back.

DARSTELLUNG DER ERFINDUNGPRESENTATION OF THE INVENTION

Es ist daher die Aufgabe der Erfindung, eine Rückenlehne der in DE 100 48 779 A1 beschriebenen Art derart weiterzubilden, dass sie einerseits dem Rücken des Benutzers bei allen möglichen Bewegungen, sei es sagittal, transversal oder tordierend, optimale Stützung bietet, andererseits aber dennoch kostengünstig herstellbar ist, insbesondere für große Stückzahlen ein Minimum an Herstellungsaufwand erfordert. Dennoch soll aber selbstverständlich auch eine hohe Stabilität der Konstruktion im robusten Alltagsbetrieb gewährleistet sein. Schließlich soll die erfindungsgemäße Rückenlehne auch ästhetisch, unter den Kriterien des industriellen Designs, eine optimale Lösung darstellen.It is therefore an object of the invention to develop a backrest of the type described in DE 100 48 779 A1 such that on the one hand the back of the user in all possible movements, be it sagittal, transversal or tordierend, optimal support offers, on the other hand, but still inexpensive to produce, especially for large quantities requires a minimum of manufacturing effort. Nevertheless, of course, a high stability of the construction in robust everyday operation should be guaranteed. Finally, the backrest according to the invention should also be aesthetically, under the criteria of industrial design, an optimal solution.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 und der Unteransprüche gelöst.This object is solved by the features of claim 1 and the dependent claims.

Der Kern der Erfindung ist die Idee, den Rahmen mit dem Lehnenträger einstückig zu verbinden, also Rahmen und Lehnenträger als einstückiges Bauteil auszuführen, wobei die beiden Schenkel des Lehnenträgers in einem Verbindungsstück zusammenlaufen, und das Verbindungsstück glatt und übergangslos in den unteren Quersteg des Rahmens einläuft. Dabei ist dieses Bauteil ein Spritzgussteil aus einem glasfaserverstärkten Polyamid-Kunststoff, vorzugsweise einem Polyarylamid, und durch Gas-Injektionstechnik (GIT) hergestellt, wodurch sich weitgehend hohle Einzelteile herstellen lassen.The essence of the invention is the idea of integrally connecting the frame with the backrest support, so run frame and backrest support as one-piece component, the two legs of the backrest support converge in a connector, and the connector smoothly and smoothly enters the lower cross bar of the frame , In this case, this component is an injection molded part made of a glass fiber reinforced polyamide plastic, preferably a Polyarylamid, and produced by gas injection technique (GIT), which can be produced largely hollow items.

Mit der erfindungsgemäßen Konstruktion wird erreicht, dass die Rückenlehne einerseits die Membran optimale Stützungskräfte für den Rücken des Benutzers entfalten lässt, andererseits aber in eleganter Weise und technisch kostengünstig und stabil eine kardano-elastische Verbindung zwischen Lehne und Lehnenträger bewirkt.With the construction according to the invention it is achieved that the backrest on the one hand can unfold the membrane optimal support forces for the back of the user, but on the other hand elegantly and technically inexpensive and stable causes a cardano-elastic connection between the back and backrest support.

Die Erfindung macht es auch möglich, die Rückenlehne samt Lehnenträger als Sichtteil, also ohne besondere Verkleidung, auszubilden, was nicht nur die Zahl der Einzelteile und damit den Herstellaufwand reduziert, sondern auch gestalterisch prägt und einen hohen Wiedererkennungswert realisiert.The invention also makes it possible, the backrest together with backrest support as a visible part, ie without special panel form, which not only reduces the number of items and thus the manufacturing costs, but also shapes the design and realized a high recognition value.

Auch die Zahl der konstruktiven Elemente der erfindungsgemäßen Rückenlehne ist auf ein Minimum reduziert, und drückt damit den Herstellaufwand. Durch die weitgehend hohlen Kunststoffteile wird ein sehr niedriges Gewicht erzielt. Dabei verfügt die erfindungsgemäße Rückenlehne aber dennoch über ein ganz besonders hohes Maß an Stabillität, denn ein unter Gewalteinwirkung erfolgendes Abreißen der Lehne vom Träger ist wegen der einstückigen Ausführung ersichtlich nicht mehr möglich. Ferner verfügt die erfindungsgemäße Rückenlehne bei der gewählten Dimensionierung und dem gewählten Kunststoff über eine sehr hohe Steifigkeit und Widerstandsfähigkeit gegenüber mechanischer Beanspruchung.Also, the number of structural elements of the backrest according to the invention is reduced to a minimum, and thus expresses the manufacturing effort. Due to the largely hollow plastic parts a very low weight is achieved. However, the backrest according to the invention still has a whole a particularly high degree of stability, because a tearing off the back of the wearer under the influence of force is no longer possible due to the one-piece design. Furthermore, the backrest according to the invention has a very high rigidity and resistance to mechanical stress in the selected dimensions and the selected plastic.

Gegenüber der dorsokinetisch flexiblen Aufhängung der Lehne an einem Aluminiumträger hat die erfindungsgemäße Rückenlehne den weiteren Vorteil, dass ergonomisch erwünschte elastische Abstützungskräfte für den Rücken des Benutzers auch vom Lehnenträger beigesteuert werden, während der Aluminiumträger starr ist.Compared with the dorsokinetically flexible suspension of the backrest on an aluminum support, the backrest according to the invention has the further advantage that ergonomically desirable elastic support forces for the user's back are also contributed by the backrest support, while the aluminum support is rigid.

KURZE BESCHREIBUNG DER ZEICHNUNGENBRIEF DESCRIPTION OF THE DRAWINGS

Nachstehend wird die Erfindung anhand eines in Zeichnungen dargestellten Ausführungsbeispiels näher erläutert. Dabei zeigt:

Fig.1
die perspektivische Ansicht von vorn einer Rückenlehne nach der Erfindung mit zusammengebautem Lager für die Nackenstütze,
Fig.2
die gleiche Ansicht wie Fig.1, jedoch mit der Anbindung der Nackenstütze in Explosionsdarstellung, und
Fig.3
eine Seitenansicht der in Figuren 1 und 2 dargestellten Rückenlehne.
The invention will be explained in more detail with reference to an embodiment shown in the drawings. Showing:
Fig.1
the front perspective view of a backrest according to the invention with assembled bearing for the neck support,
Fig.2
the same view as Figure 1, but with the connection of the neck support in exploded view, and
Figure 3
a side view of the backrest shown in Figures 1 and 2.

WEGE ZUR AUSFÜHRUNG DER ERFINDUNGWAYS FOR CARRYING OUT THE INVENTION

In den Figuren ist eine erfindungsgemäße Rückenlehne dargestellt, die den Rahmen 1, den Lehnenträger 6, und die Nackenstütze 15 umfasst.In the figures, a backrest according to the invention is shown, comprising the frame 1, the backrest support 6, and the neck support 15.

Der Rahmen 1 besteht aus dem linken Seitenteil 2 und dem rechten Seitenteil 3. Diese beiden Seitenteile 2,3 sind miteinander über den unteren Quersteg 4 und den oberen Quersteg 5 verbunden.The frame 1 consists of the left-hand side part 2 and the right-hand side part 3. These two side parts 2, 3 are connected to one another via the lower transverse web 4 and the upper transverse web 5.

Die Seitenteile 2,3 weisen außen eine Rille 26 auf, in welche eine aus einem elastischen Gewebe bestehende (nicht gezeichnete) Membran mit ihren kederumfassten Seitenkanten eingeclipst wird.The side parts 2, 3 have, on the outside, a groove 26 into which a membrane (not shown) made of an elastic fabric is clipped with its side edges bordered with keder.

Ferner sind an den Seitenteilen 2,3 angespritzte stegförmige Halter 16,17 vorgesehen, in welche ein Band als besondere Lordosestütze eingeclipst werden kann.Further, molded on the side parts 2.3 web-shaped holder 16,17, in which a band can be clipped as a special lumbar support.

Der Lehnenträger 6 umfasst den linken Schenkel 7 und den rechten Schenkel 8, die gabelförmig im Verbindungsstück 18 zusammenlaufen. Das Verbindungsstück 18 läuft glatt und übergangslos in den unteren Quersteg 4 ein.The backrest support 6 comprises the left leg 7 and the right leg 8, which converge fork-shaped in the connecting piece 18. The connecting piece 18 runs smoothly and without transition into the lower transverse web 4.

Vorn weisen die Schenkel 7,8 Lagerböcke 9,10 auf, an denen der hintere Teil der (nicht gezeichneten) Sitzplatte gelagert wird. Ganz vorn weisen die Schenkel 7,8 Aussparungen 22 auf, in denen metallische Beschläge 11,12 eingesetzt und festgeschraubt werden. Mittels dieser Beschläge 11,12 wird der Lehnenträger 6 an der (nicht gezeichneten) Neigungsmechanik des Stuhles angelenkt. Als eine solche Neigungsmechanik kann zum Beispiel die in DE 196 40 564 A beschriebene Mechanik mit Synchronsteuerung von Sitz und Lehne verwendet werden.In front, the legs have 7.8 bearing blocks 9.10, on which the rear part of the (not shown) seat plate is stored. At the very front, the legs 7.8 recesses 22, in which metallic fittings 11,12 are used and tightened. By means of these fittings 11,12 of the backrest support 6 is hinged to the (not shown) inclination mechanism of the chair. As such a tilting mechanism, for example, the mechanism described in DE 196 40 564 A can be used with synchronous control of seat and backrest.

In der Mitte des oberen Querstegs 5 ist mittels Schrauben ein metallischer Beschlag 13 mit einem Lager 14 für die Nackenstütze 15 befestigt. In dem Lager 14 ist über das komplementäre Lagerteil 23 an der Hülse 19 schwenkbar die Nackenstütze 15 gelagert. Die Schwenkbarkeit in vorgegebenem Maße wird durch den Kulissenstein 24 bewirkt, der sich im geeignet geformten Innenteil des Lagers 23 bewegen kann. Mittels der unter der Wirkung der Schraube 27 stehenden Tellerfedern 25 wird auf dem Lager 23 eine Reibkraft erzeugt, welche es ermöglicht, dass die Nackenstütze zwar geschwenkt werden kann, aber dann in einer gewünschten Stellung feststeht. In der Höhe kann die Nackenstütze 15 durch Bewegen des Stabes 20 in der Hülse 19 verstellt werden. Auf der Trageplatte 21 wird das (nicht gezeichnete) Kopfpolster befestigt.In the middle of the upper crosspiece 5, a metallic fitting 13 with a bearing 14 for the neck support 15 is fastened by means of screws. In the bearing 14, the neck support 15 is pivotally mounted on the sleeve 19 via the complementary bearing part 23. The pivotability to a predetermined extent is effected by the sliding block 24, which can move in the suitably shaped inner part of the bearing 23. By means of standing under the action of the screw 27 cup springs 25, a friction force is generated on the bearing 23, which allows the neck support can indeed be pivoted, but then fixed in a desired position. In height, the neck support 15 can be adjusted by moving the rod 20 in the sleeve 19. On the support plate 21, the (not shown) head pad is attached.

Die Kunststoff-Formteile der Rückenlehne sind weitgehend hohl. Nur im mittleren Teil des oberen Querstegs 5 und in den unteren Teilen der beiden Schenkel 7,8 des Lehnenträgers 6 ist die Formmasse kompakt. Das ist zweckmäßig, damit die Schrauben für die Beschläge 11,12 und 13 einen festen Halt haben.The plastic moldings of the backrest are largely hollow. Only in the middle part of the upper crossbar 5 and in the lower parts of the two legs 7,8 of the backrest support 6, the molding material is compact. This is useful so that the screws for the fittings 11,12 and 13 have a firm grip.

Im Gegensatz zu der aus DE 100 48 779 A1 bekannten Rückenlehne wird bei der hier beschriebenen, erfindungsgemäßen Lehne die vcm Benutzer erzeugte Anlehnkraft nicht nur vom Lehnen-Rahmen aufgenommen, sondern auch vom einstückig angeformten Lehnenträger. Das erhöht die dorsokinetische Stützfunktion der Lehne in vorteilhafter Weise.In contrast to the backrest known from DE 100 48 779 A1, in the backrest according to the invention described here, the vcm user-generated leaning force is not only taken up by the backrest frame, but also by the backrest support integrally molded. This increases the dorsokinetic support function of the back in an advantageous manner.

Die verwendete Kunststoffmasse ist ein glasfaserverstärktes thermoplastisches. Harz auf der Basis von Polyarylamid, vorzugsweise das unter der Marke IXEF 1022 oder 1032 von der Firma Solvay S.A. vertriebene Material.The plastic compound used is a glass fiber reinforced thermoplastic. Resin based on polyarylamide, preferably under the trademark IXEF 1022 or 1032 from Solvay S.A. distributed material.

Die Formteile werden durch Gas-Injektionstechnik (GIT) hergestellt, wobei die geschmolzene Formmasse durch ein unter hohem Druck in die Kavität des Spritzwerkzeugs injiziertes inertes Gas, vorzugsweise Stickstoff, an die Formwand verdrängt wird.The moldings are produced by gas injection technique (GIT), wherein the molten molding material is displaced by an under high pressure in the cavity of the injection mold injected inert gas, preferably nitrogen, to the mold wall.

Ersichtlich ist die Herstellung der Rückenlehne samt angeformtem Lehnenträger über die beschriebene Spritzgusstechnik bei der Herstellung großer Stückzahlen hinsichtlich Herstellungs- und Montageaufwand von unschätzbarem Wert.As can be seen, the manufacture of the backrest including integrally molded backrest carrier via the injection molding technique described in the production of large quantities in terms of manufacturing and assembly costs of inestimable value.

Wie das besprochene Ausführungsbeispiel überzeugend zeigt, weist die Rückenlehne nach der Erfindung die aufgabengemäßen Vorteile vollumfänglich auf: sie bewirkt hervorragenden Sitzkomfort durch optimale Stützung des Rückens, ist mit gegenüber dem Stand der Technik erheblich reduziertem Aufwand herzustellen, zu transportieren und zu montieren, und bietet vom industriellen Design her eine hohe Ästhetik und gestalterische Einprägbarkeit.As the discussed embodiment convincingly shows, the backrest according to the invention, the task-related advantages in full: it causes excellent seating comfort through optimal support of the back, is compared to the prior art, significantly reduced effort to produce, transport and assemble, and offers by industrial design produces a high level of aesthetics and design.

Bezeichnungslistename list

11
Rahmenframe
22
linkes Seitenteilleft side panel
33
rechtes Seitenteilright side part
44
unterer Quersteglower crosspiece
55
oberer Querstegupper crosspiece
66
Lehnenträgerbackrest support
77
linker Schenkelleft thigh
88th
rechter Schenkelright thigh
99
linker Sitz-Lagerbockleft seat bearing bracket
1010
rechter Sitz-Lagerbockright seat bearing block
1111
linker Beschlagleft fitting
1212
rechter Beschlagright fitting
1313
Beschlag für NackenstützeFitting for neck support
1414
Lager für NackenstützeBearings for neck support
1515
Nackenstützeheadrest
1616
linker Steghalterleft bar holder
1717
rechter Steghalterright bar holder
1818
Verbindungsstückjoint
1919
Hülseshell
2020
StabRod
2121
Trageplattesupport plate
2222
Aussparungrecess
2323
Lager an NackenstützeBearings on neck support
2424
Kulissensteinsliding block
2525
TellerfedernDisc springs
2626
Rille für MembrankederGroove for membrane leather
2727
Schraube für Lager der NackenstützeBolt for bearing the neck support

Claims (5)

  1. Backrest for a chair, the backrest being designed as a frame (1) with a membrane stretched in it, the frame (1) comprising two lateral side parts (2, 3) running essentially vertically, and two transverse webs (4, 5) which run essentially horizontally and connect the side parts (2, 3), and the upper transverse web (5) connecting the two side parts (2, 3) to each other at their upper ends, and the lower transverse web (4) connecting the two side parts (2, 3) to each other in the region of the lumbar spinal column of the user, and the frame (1) being suspended in the centre of the lower transverse web (4) on a backrest support (6) comprising two limbs (7, 8) running under the seat, characterized in that
    - the backrest support (6) is connected integrally to the frame (1),
    - the frame (1) and the backrest support (6), which is connected integrally thereto, comprise an injection-moulded part made from a glass-fibre-reinforced polyamide plastic, preferably a polyaryl amide,
    - the moulded part is hollow except for the central region of the upper transverse web (5) and the two limbs (7, 8) of the backrest support (6), and
    - the two limbs (7, 8) of the backrest support (6) converge in a connecting piece (18), and the connecting piece (18) runs smoothly and without a transition into the lower transverse web (4) of the frame (1).
  2. Backrest according to Claim 1, characterized in that an integrally formed bearing bracket (9, 10) for supporting the seat panel is provided on each of the two limbs (7, 8) of the backrest support (6), and cutouts (22) for receiving fittings (11, 12) for connection to the inclination mechanism are provided in the front region, and in that a fitting (13), which can be fastened by screws, with a bearing (14) for receiving a neck support (15) is provided in the centre of the upper transverse web (5).
  3. Backrest according to Claim 1, characterized in that web holders (16, 17) are provided on the two side parts (2, 3) of the frame (1) level with the lower transverse web (4), into which web holders a strap for supporting the lordosis of the lumbar spinal column of the user can be fastened.
  4. Backrest according to Claim 2, characterized in that a sleeve (20) is mounted pivotably in the bearing (14) on the fitting (13) on the upper transverse web (5), in which sleeve a bar (21) is provided in a manner such that it can be extended, and the supporting panel (22) of the head cushion of the neck rest (15) is fastened to the said bar.
  5. Method for producing a backrest according to Claim 1, characterized in that the moulded part is produced by a gas injection technique (GIT).
EP03003522A 2003-02-16 2003-02-16 Backrest Expired - Lifetime EP1447029B1 (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
AT03003522T ATE336187T1 (en) 2003-02-16 2003-02-16 BACKREST
EP03003522A EP1447029B1 (en) 2003-02-16 2003-02-16 Backrest
DE50304649T DE50304649D1 (en) 2003-02-16 2003-02-16 backrest
ES03003522T ES2269841T3 (en) 2003-02-16 2003-02-16 BACK.
CA002455046A CA2455046A1 (en) 2003-02-16 2004-01-13 Backrest
US10/759,195 US7147288B2 (en) 2003-02-16 2004-01-20 Backrest
MXPA04000841A MXPA04000841A (en) 2003-02-16 2004-01-27 Backrest.
AU2004200278A AU2004200278B2 (en) 2003-02-16 2004-01-27 Backrest
NZ530857A NZ530857A (en) 2003-02-16 2004-01-29 Backrest
CN200410004183.0A CN100506116C (en) 2003-02-16 2004-02-13 Backrest
CN200420003810.4U CN2749372Y (en) 2003-02-16 2004-02-16 Backrest
HK05101035.0A HK1068526A1 (en) 2003-02-16 2005-02-07 Backrest

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03003522A EP1447029B1 (en) 2003-02-16 2003-02-16 Backrest

Publications (2)

Publication Number Publication Date
EP1447029A1 EP1447029A1 (en) 2004-08-18
EP1447029B1 true EP1447029B1 (en) 2006-08-16

Family

ID=32668993

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03003522A Expired - Lifetime EP1447029B1 (en) 2003-02-16 2003-02-16 Backrest

Country Status (11)

Country Link
US (1) US7147288B2 (en)
EP (1) EP1447029B1 (en)
CN (2) CN100506116C (en)
AT (1) ATE336187T1 (en)
AU (1) AU2004200278B2 (en)
CA (1) CA2455046A1 (en)
DE (1) DE50304649D1 (en)
ES (1) ES2269841T3 (en)
HK (1) HK1068526A1 (en)
MX (1) MXPA04000841A (en)
NZ (1) NZ530857A (en)

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JP5005167B2 (en) * 2004-10-13 2012-08-22 株式会社岡村製作所 Chair backrest structure
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KR100756349B1 (en) * 2006-12-18 2007-09-10 제일모직주식회사 Composite of nylon polymer
KR100878574B1 (en) * 2007-12-28 2009-01-15 제일모직주식회사 Nylon/reinforced fiber composition
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Also Published As

Publication number Publication date
EP1447029A1 (en) 2004-08-18
DE50304649D1 (en) 2006-09-28
US20040195899A1 (en) 2004-10-07
CN100506116C (en) 2009-07-01
NZ530857A (en) 2005-02-25
ES2269841T3 (en) 2007-04-01
US7147288B2 (en) 2006-12-12
CN1537490A (en) 2004-10-20
CA2455046A1 (en) 2004-08-16
HK1068526A1 (en) 2005-04-29
AU2004200278B2 (en) 2006-09-14
MXPA04000841A (en) 2004-12-06
AU2004200278A1 (en) 2004-09-02
ATE336187T1 (en) 2006-09-15
CN2749372Y (en) 2006-01-04

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