EP2617326B1 - Dossier - Google Patents

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Publication number
EP2617326B1
EP2617326B1 EP20120000387 EP12000387A EP2617326B1 EP 2617326 B1 EP2617326 B1 EP 2617326B1 EP 20120000387 EP20120000387 EP 20120000387 EP 12000387 A EP12000387 A EP 12000387A EP 2617326 B1 EP2617326 B1 EP 2617326B1
Authority
EP
European Patent Office
Prior art keywords
frame
coil spring
back support
support according
sections
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP20120000387
Other languages
German (de)
English (en)
Other versions
EP2617326A1 (fr
Inventor
Petra Jeske
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP20120000387 priority Critical patent/EP2617326B1/fr
Publication of EP2617326A1 publication Critical patent/EP2617326A1/fr
Application granted granted Critical
Publication of EP2617326B1 publication Critical patent/EP2617326B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • A47C7/42—Support for the head or the back for the back of detachable or loose type
    • A47C7/425—Supplementary back-rests to be positioned on a back-rest or the like

Definitions

  • the invention relates to a backrest, which can be arranged on chairs or seats.
  • Backrests are used to improve seating comfort by supporting the lumbar area with the back support, while maintaining a natural posture.
  • the DE 692 08 398 T2 describes, for example, a back support for seats, in particular for motor vehicle seats, which has pivotable support elements which are pivotable about a vertical axis to each other, that the general hollow curvature of the support is variable.
  • the DE 196 42 765 A1 describes an adjustable lumbar support with an elliptical flexible panel that provides resistance when bent.
  • DE 2 040 794 A1 discloses a backrest according to the preamble of claim 1 of the present application.
  • Back braces consist of a fabric frame covered with a fabric, which is shaped so that the tissue takes the form of a saddle surface.
  • the steel frame is relatively stiff, so that the necessary elasticity of the back support is essentially provided only by the tissue.
  • Object of the present invention is to provide a back support of the aforementioned type, which is improved in sitting comfort.
  • a cup-shaped back support for a seat comprising a frame and a stretched over the frame covering, wherein the frame is bent so that the fabric is curved in the form of a saddle surface, it being provided that the frame has at least one flexible portion which comprises at least one coil spring determining or at least co-determining the flexibility of the section, hereinafter referred to as "helical spring frame section”.
  • the back support adapts particularly well to the back contour, because the coil spring combines the advantage of sufficient bending stiffness with the advantage of high elasticity.
  • the coil spring also offers the advantage that its mechanical properties can be adjusted within wide limits by varying the diameter of the coil, wire thickness and wire material.
  • the frame has a plurality of helical spring frame sections, wherein at least two of these have different flexural stiffnesses by having different flexurally stiff helical springs.
  • the helical spring frame section has a plurality of coaxially arranged coiled springs.
  • the helical spring frame section has a plurality of helical springs disposed axially one behind the other.
  • the coil springs may have a different flexural rigidity.
  • the support region of the back support, in which it rests on a seat surface, not or slightly elastic the two side region may have a high elasticity and the upper connection region may have a relatively low elasticity.
  • the helical spring frame portion may comprise an inner frame member which passes through the coil spring or the coil springs.
  • This frame element can be provided to predetermine the edge contour of the helical spring frame section in front of the elastic deformation occurring during use of the back support.
  • the frame member may be formed, for example, of metal or plastic.
  • the inner Frame member may serve to connect the coil spring or the coil springs to a frame portion.
  • the inner frame member may have a lower flexural rigidity than the coil spring or the coil springs of the coil spring frame portion.
  • the frame is formed as a closed or almost closed ring and having an inner frame on which at least partially a coil spring or a plurality of coil springs is arranged or are to form at least one coil spring frame portion.
  • the term "ring" refers to a closed or nearly closed frame.
  • the contour of the ring may e.g. be designed as a polygon with rounded corners or as an oval or the like, it need not be circular.
  • Embodiments are possible in which the frame is formed as a closed or nearly closed ring whose circumference consists exclusively of coil spring frame sections.
  • the frame is formed as a closed or nearly closed frame whose circumference consists of frame sections with different bending strength, wherein at least one of the frame sections, which has comparatively low bending stiffness, is designed as a helical spring frame section.
  • the inner frame element of the helical spring frame section and / or the inner frame at least partially formed as a pipe or rod made of metal or plastic. It can also be provided that a plurality of thin wires twisted into a rope form the frame element.
  • the inner frame member and / or the inner frame of the frame is at least partially formed as a rod of twisted metal wires.
  • the inner frame element of the helical spring frame section and / or the inner frame of the frame may have a plastic coating and / or a plastic sheath, for example heat shrink tubing and / or be injected in preferably flexible plastic.
  • the helical spring frame section has a plastic coating and / or a plastic sleeve, preferably a screw tube, and / or is injected in preferably flexible plastic.
  • the optical impression can be improved and / or the coil springs can be padded, so that it is prevented that thin objects, such as hair, textile fibers or the like, get between the screw coils and clamped there.
  • helical springs arranged one behind the other are connected to one another within the helical spring frame section and / or two helical spring frame sections adjoining one another by a connecting element.
  • the connecting element can engage in associated end portions of the associated coil springs and / or engage the entire length of at least one of the springs to be connected.
  • the connecting element surrounds the associated end sections of the coil springs to be connected and / or the entire length of at least one of the coil springs to be connected. It can also be provided that the one end section of the connecting element engages through the helical spring and the other end section of the connecting element engages around the helical spring.
  • the connecting element may, for example, have an external thread or an internal thread onto which the helical spring can be screwed, whereby a detachable connection is obtained.
  • such a connecting element may be formed of two sections, which are interconnected by an axial pivot bearing. In a further advantageous embodiment, it can be provided to design the thread conically, so that manufacturing tolerances play no role. It can also be provided to permanently connect the connecting element and the helical spring with each other, for example by gluing.
  • the connecting element may have a greater flexural rigidity than the coil springs to be connected.
  • Fig. 1 shows a backrest 1 attached to a backrest of a chair 2 by means of an elastic tensioning belt 14.
  • the back support 1 has the shape of a saddle surface, that is, it is curved in the opposite direction in the two main directions.
  • a correspondingly shaped annular frame 11 (see Fig. 2 and 3 ) is covered with a net-shaped fabric 12.
  • the frame 11 has a frame covering 13, which forms a padding for the frame 11 and may be formed, for example, from a soft fabric.
  • the frame 11 is preferably formed of a frame spring 11f. It This is a helical spring, which is not stressed here on train or pressure, but bending in its longitudinal axis. Compared to prior art frames, which are formed from a steel tube or a steel wire, the frame according to the invention has a higher elasticity, without sacrificing basic strength.
  • the frame 11 is formed of a plurality of axially successively arranged springs 11f. In the different areas of the frame 11 springs 11f are used with different bending stiffness.
  • struts 15 are arranged, which consist for example of steel wire, wherein a tubular strut casing 16 improves the seating comfort.
  • struts 15 are made of textile tape, wire rope, plastic rope, optionally as a net or fabric made therefrom, or in the form of a plate.
  • the struts 15 in addition to the frame covering 13 contribute to the fact that the frame 11 is curved in the form of a saddle surface.
  • modified versions possible in which not only two struts 15 but three or more struts are provided.
  • modified versions are possible in which only one strut is provided.
  • Fig. 5 shows an embodiment in which the frame spring 11 f is penetrated by an annular inner frame member 11 e, which in the in Fig. 5 illustrated embodiment is formed wire-shaped.
  • the frame member 11e may be formed of spring steel. But it is also possible to form the frame member of an elastic plastic and to be used substantially as a connecting element connecting the frame spring 11f to the closed annular frame 11.
  • the 6 and 7 show embodiments in which one or more frame springs 11f are connected by rigid connecting members 11v to the closed annular frame 11.
  • connecting element 11v is formed as a recessed at both end portions cylinder which engages with its end portions two adjacent frame springs 11f.
  • the end portions may be glued, for example, in the frame springs 11f.
  • connecting element 11v is designed as a trained at both end portions as a plug-in cylinder which engages around two adjacent frame springs 11f with its end portions.
  • the frame springs 11f may, for example, be glued into the end sections.

Landscapes

  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs Characterized By Structure (AREA)

Claims (16)

  1. Dossier (1) présentant une forme de coque pour un meuble d'assise,
    comprenant un cadre (11) et un habillage (12) tendu sur le cadre (11), sachant que le cadre (11) est incurvé de telle manière que l'habillage (12) est bombé à la manière d'une surface de selle,
    sachant que le cadre (11) présente au moins une section flexible, qui présente un ressort hélicoïdal (11f) définissant la flexibilité de la section ou du moins contribuant à la définition de cette dernière, ladite section étant désignée ci-après par « section de cadre de ressort hélicoïdal », caractérisé en ce que le cadre (11) présente plusieurs sections de cadre de ressort hélicoïdal, et en ce qu'au moins deux desdites sections de cadre de ressort hélicoïdal présentent une résistance à la flexion différente en ce qu'elles présentent des ressorts hélicoïdaux (11f) présentant une résistance à la flexion différente.
  2. Dossier selon l'une des revendications précédentes,
    caractérisé en ce que
    la section de cadre de ressort hélicoïdal présente plusieurs ressorts hélicoïdaux (11f) disposés de manière coaxiale les uns par rapport aux autres.
  3. Dossier selon l'une des revendications précédentes,
    caractérisé en ce que
    la section de cadre de ressort hélicoïdal présente plusieurs ressorts hélicoïdaux (11f) disposés de manière axiale les uns derrière les autres.
  4. Dossier selon l'une des revendications précédentes,
    caractérisé en ce que
    la section de cadre de ressort hélicoïdal présente un élément de cadre intérieur qui traverse le ou les ressorts hélicoïdaux (11f).
  5. Dossier selon la revendication 4,
    caractérisé en ce que
    l'élément de cadre intérieur présente une résistance à la flexion plus faible que le ou les ressorts hélicoïdaux (11f) de la section de cadre de ressort hélicoïdal.
  6. Dossier selon l'une des revendications précédentes,
    caractérisé en ce que
    le cadre (11) est réalisé sous la forme d'un anneau fermé ou quasiment fermé et présente un cadre intérieur, sur lequel est ou sont disposés, au moins par endroits, un ou plusieurs ressorts hélicoïdaux (11f) en formant au moins une section de cadre de ressort hélicoïdal.
  7. Dossier selon l'une des revendications précédentes,
    caractérisé en ce que
    le cadre (11) est réalisé sous la forme d'un anneau fermé ou quasiment fermé, dont la périphérie est constituée exclusivement de sections de cadre de ressort hélicoïdal.
  8. Dossier selon l'une des revendications précédentes,
    caractérisé en ce que
    le cadre est réalisé sous la forme d'un cadre fermé ou quasiment fermé, dont la périphérie est constituée de sections de cadre présentant une résistance à la flexion différente, sachant qu'au moins une des sections de cadre, qui présente comparativement une faible résistance à la flexion, est réalisée sous la forme d'une section de cadre de ressort hélicoïdal.
  9. Dossier selon l'une des revendications précédentes,
    caractérisé en ce que
    l'élément de cadre intérieur de la section de cadre de ressort hélicoïdal et/ou le cadre intérieur sont réalisés au moins par endroits sous la forme de tuyau ou de barre en métal ou en plastique.
  10. Dossier selon l'une des revendications précédentes,
    caractérisé en ce que
    l'élément de cadre intérieur et/ou le cadre intérieur du cadre sont réalisés au moins par endroits sous la forme d'une tige ou de fils métalliques torsadés.
  11. Dossier selon l'une des revendications précédentes,
    caractérisé en ce que
    l'élément de cadre intérieur de la section de cadre de ressort hélicoïdal et/ou le cadre intérieur du cadre présente un revêtement en plastique et/ou une enveloppe en plastique, par exemple une gaine rétractable, et/ou sont injectés dans un plastique de préférence flexible.
  12. Dossier selon l'une des revendications précédentes,
    caractérisé en ce que
    la section de cadre de ressort hélicoïdal présente un revêtement en plastique et/ou une enveloppe en plastique, de préférence une gaine rétractable, et/ou est injectée dans un plastique de préférence flexible.
  13. Dossier selon l'une des revendications précédentes,
    caractérisé en ce que
    des ressorts hélicoïdaux (11f) disposés les uns derrière les autres sont reliés entre eux par un élément de liaison (11v) à l'intérieur de la section de cadre de ressort hélicoïdal et/ou de deux sections de cadre de ressort hélicoïdal se jouxtant l'une derrière l'autre.
  14. Dossier selon la revendication 13,
    caractérisé en ce que
    l'élément de liaison (11v) vient en prise avec des sections d'extrémité associées des ressorts hélicoïdaux (11f) associés, et/ou traverse l'intégralité de la longueur d'au moins un des ressorts à relier.
  15. Dossier selon la revendication 13,
    caractérisé en ce que
    l'élément de liaison entoure les sections d'extrémité associées des ressorts hélicoïdaux (11f) à relier et/ou l'intégralité de la longueur d'au moins un des ressorts hélicoïdaux (11f) à relier.
  16. Dossier selon l'une quelconque des revendications 13 à 15,
    caractérisé en ce que
    l'élément de liaison (11v) présente une plus grande résistance à la flexion que les ressorts hélicoïdaux (11f) à relier.
EP20120000387 2012-01-21 2012-01-21 Dossier Active EP2617326B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20120000387 EP2617326B1 (fr) 2012-01-21 2012-01-21 Dossier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20120000387 EP2617326B1 (fr) 2012-01-21 2012-01-21 Dossier

Publications (2)

Publication Number Publication Date
EP2617326A1 EP2617326A1 (fr) 2013-07-24
EP2617326B1 true EP2617326B1 (fr) 2014-10-15

Family

ID=45560657

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20120000387 Active EP2617326B1 (fr) 2012-01-21 2012-01-21 Dossier

Country Status (1)

Country Link
EP (1) EP2617326B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD851961S1 (en) 2019-01-18 2019-06-25 Relax Support, LLC Pillow
USD950275S1 (en) 2019-10-28 2022-05-03 Fka Distributing Co., Llc Back support

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1541213A (en) * 1922-12-11 1925-06-09 Erskine P Harley Seat cushion
DE1064360B (de) * 1954-03-03 1959-08-27 Kurt Herzer Zusaetzliche Rueckenstuetze fuer Autositze od. dgl.
FR1394606A (fr) * 1963-05-22 1965-04-02 Appui-dos pour le dossier de sièges de véhicules
AT308318B (de) * 1969-12-12 1973-06-25 Wilhelm Schuster Ing Bespannung für Liege-, Sitz- und Stützflächen aller Art
US3679261A (en) * 1970-04-03 1972-07-25 Christo G Slabakov Automobile seat back
IT1249658B (it) 1991-06-11 1995-03-09 Fiat Auto Spa Elemento di sopporto dorsale per sedili, particolarmente sedili automobilistici.
US5190347A (en) * 1991-11-05 1993-03-02 Shiow Lan Liou Adjustable flexible back cushion with adjusting belts and attachment belt
AU6819896A (en) 1995-10-16 1997-04-24 Bosaro Biotech Inc. Adjustable lumbar support

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD851961S1 (en) 2019-01-18 2019-06-25 Relax Support, LLC Pillow
USD950275S1 (en) 2019-10-28 2022-05-03 Fka Distributing Co., Llc Back support

Also Published As

Publication number Publication date
EP2617326A1 (fr) 2013-07-24

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