EP2187782B1 - Dossier, en particulier de chaise de bureau - Google Patents

Dossier, en particulier de chaise de bureau Download PDF

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Publication number
EP2187782B1
EP2187782B1 EP08801543A EP08801543A EP2187782B1 EP 2187782 B1 EP2187782 B1 EP 2187782B1 EP 08801543 A EP08801543 A EP 08801543A EP 08801543 A EP08801543 A EP 08801543A EP 2187782 B1 EP2187782 B1 EP 2187782B1
Authority
EP
European Patent Office
Prior art keywords
backrest
support
region
joint
link
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
EP08801543A
Other languages
German (de)
English (en)
Other versions
EP2187782A1 (fr
Inventor
Martin Potrykus
Armin Sander
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.)
Koenig and Neurath AG
Original Assignee
Koenig and Neurath 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 Koenig and Neurath AG filed Critical Koenig and Neurath AG
Publication of EP2187782A1 publication Critical patent/EP2187782A1/fr
Application granted granted Critical
Publication of EP2187782B1 publication Critical patent/EP2187782B1/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—Supports for the head or the back
    • A47C7/40—Supports for the head or the back for the back
    • A47C7/46—Supports for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A47C7/462—Supports for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means
    • A47C7/465—Supports for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means by pulling an elastic cable
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Supports for the head or the back
    • A47C7/40—Supports for the head or the back for the back
    • A47C7/44—Supports for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/445—Supports for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with bar or leaf springs
    • 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—Supports for the head or the back
    • A47C7/38—Supports for the head or the back for the head, e.g. detachable

Definitions

  • the invention relates to a backrest, in particular an office chair, according to the preamble of claim 1.
  • An office chair with such a backrest is z. B. from the EP 0 815 778 A1 and in particular from the GB2 085 719 A known.
  • a lumbar support may be provided in the lordosis area of the user's back.
  • the invention is therefore based on the object, a backrest, preferably for a chair, in particular for an office chair, specify, which has a particularly effective lumbar support while maintaining high comfort and low cost.
  • the backrest is initially formed of two superimposed backrest areas, which are held on a backrest support.
  • the two backrest areas are connected to one another in the lordosis region of the back of a user in an articulated manner.
  • the two backrest areas are expediently each formed by rigid, substantially deformation resistant backrest cushion.
  • the two backrest areas are suitably arranged to form an S-shaped support or outer contour leaning front side gapless and back each other spaced apart.
  • the lean or pad back release or gap contour allows in a simple and visually virtually invisible manner, the desired deformability between the two backrest areas with simultaneous deformation stiffness of the two backrest areas.
  • These backrest areas are hinged to the backrest support to form a four-bar linkage.
  • the hinge points or axes are expediently positioned such that two preferably vertically offset one above the other provided in the backrest longitudinal direction joints are provided in the lower, seat-near region of the backrest front, while the other two, also vertically offset in the backrest longitudinally superimposed joints Lehnengurjan lamp are realized on the backrest support ,
  • a headrest is attached.
  • This comprises a support or support frame, in particular with two support legs, which suitably enclose an obtuse angle with each other.
  • a headrest main in particular a headrest pad attached.
  • the angled shape of the support frame is preferably selected such that the headrest or the head restraint head in a backrest position with a maximum curved lumbar support in the vertical direction is aligned with the upper backrest area and leaning in a Lehnenneigeposition the upper backrest area front overhangs.
  • the position of the headrest and the corresponding support frame always remains the same relative to the lower support arm of the backrest support, while by pressing the backrest areas or the backrest cushion towards the backrest support to the tilting of the backrest, the distance of the upper backrest portion for headrest becomes increasingly larger the result is that the shoulder area of the operator tends to lean back more in comparison to the head.
  • a first joint of the joint connection which is effective in the manner of a four-bar chain, is expediently formed between the upper back region and the lower back region and there again in the region of the lumbar support.
  • a second joint is expediently formed between the lower back region and the (lower) support arm of the backrest support.
  • a third joint of this four-bar chain or articulated connection is formed between the (lower) support arm and an articulated on this (upper) back arm of the backrest support.
  • the fourth joint of the four-bar linkage is then expediently formed between the upper backrest region and the (upper) backrest link of the backrest support.
  • the two backrest areas and backrest cushions leaning on the top of the backrest support are hinged, in particular suspended on the backrest support quasi.
  • the functional principle of the four-bar linkage is thus realized by the members connecting the four joints themselves are each rigid between the articulated backrest support on the one hand and the flexible connection between the two backrest areas.
  • the thus formed between the two backrest areas flexible area is located at the height of about the lordosis of the operator and forms the flexible lumbar support there.
  • the degree of curvature of the flexible lumbar support decreases continuously depending on the pressure exerted on the backrest (contact pressure) that the lumbar support is increasingly flattening. Due to the four-bar linkage here, the buckling decrease takes place practically independent of where the force or pressure is applied along the backrest. The reason for this is that with such a pressure or force on the backrest along the two backrest areas of the upper backrest arm of the backrest support quasi stretches and thus the upper, relatively long backrest area is pulled vertically upwards at the upper back end.
  • the joint connection which is effective in the manner of a four-bar chain, is spring-supported at a suitable location.
  • a spring element suitable for this purpose can be provided on the joints of the articulated connection or also in the area of the lumbar support of the two-part backrest.
  • the spring force of the spring element acts in the direction of the lordosis of the operator, with an inclination of the backrest, this spring force must be overcome and thus the backrest automatically exerts an increasing counterforce against the back of the operator.
  • no or little pressure on the backrest, especially in the lumbar region exercised when the operator sits vertically.
  • a corresponding spring element may be provided in the form of a leg spring, in particular on the third joint.
  • a tension spring can be provided backwards between the two backrest areas or backrest cushions.
  • a leaf spring in the region of the lumbar support on the side facing the back of the operator (back of the backrest) of the backrest cushion is particularly advantageous, since at this point the spring element or the leaf spring can be completely and thus invisibly upholstered in a particularly simple manner.
  • the two mutually connected to form the flexible lumbar support backrest areas or cushions are advantageously resistant to deformation and thus rigid, move under a load or force of the backrest, especially in a tilt of the backrest in an alternative embodiment with a synchronous mechanism between the backrest and the Seat of a chair, although the two backrest areas relative to each other, but remain undeformed itself.
  • This rigid design of the two backrest areas also ensures the reliable operation principle of the four-bar chain, in which the four individual, hingedly interconnected links to ensure this functional principle are rigid.
  • This embodiment thus causes the backrest of an operator against the backrest and also at their additional inclination in the embodiment with a synchronous mechanism, the area spanned by the four-bar chain surface with increasing contact pressure against the backrest area is increasingly smaller.
  • This comfort behavior or comfort desire is due to the fact that in the upright sitting position, a vertical load on the spine, while such a burden decreases with increasing inclination of the spine in the horizontal position. So it is more comfortable with increasing inclination in the horizontal position, although the support in the lumbar region decreases accordingly.
  • the backrest of the invention justice by the flexible lumbar support in the upright seating position ensures sufficient support in the lumbar region of an operator, with increasing inclination in a reclined sitting position, however, automatically provides a decreasing lordosis support.
  • the trained as an office chair chair 1 according to the Fig. 1 to 6 includes one with a in the FIGS. 5 and 6 indicated stand connected backrest support 2 to which a two-part backrest 3 is held articulated with an upper backrest portion 3a and a lower back portion 3b.
  • the backrest support 2 comprises a lower support arm 20 and an upper backrest link 21 which is articulated therewith.
  • the comparatively short, comparatively short L-limb 20b extending in the z-direction and extending in the z-direction approximately vertically extends the L-limb 20a a seat 4.
  • This flexible connection between the comparatively long, upper back region 3a and the comparatively short, lower back region 3b is produced in the exemplary embodiment by a back recess or recess 7 within the otherwise dimensionally stable or deformation-resistant - and thus rigid - backrest cushion 3. It is essential that Both the upper back region 3a and the lower back region 3b are correspondingly rigid or rigid, while the intermediate region, in which the lumbar support 5 is located, is flexible and, in particular, flexibly deformable. This flexibility or malleability in turn is such that virtually in this area of the lumbar support 5 between the otherwise rigid upper backrest area and the likewise rigid lower backrest area 3b quasi a (first) joint 8a of an effective manner of a four-bar linkage joint 8 is formed.
  • first joint 8a there is also a second joint 8b on the back of the backrest and offset there in the (-) x-direction and in the z-direction below the first joint 8a.
  • the two further joints 8c and 8d of the four-bar linkage 8 are located at the back of each other on both sides of the upper backrest link 21.
  • the third articulation 8c forming the articulated connection between the support link 20 and the backrest link 21 is located above the first articulation 8a and in the z direction. -) offset x direction to the second joint 8b.
  • the fourth joint 8d forms an articulated connection between the upper backrest link 21 of the backrest support 20 and the upper side of the upper backrest region 3a.
  • This fourth joint 8d is positioned in the z-direction above the third joint 8c and in the z-direction between the second joint 8b and the third joint 8c.
  • the rigid chain links associated with the formation of the four-bar chain 8 are illustrated by the virtual connecting lines between the four joints 8a to 8d. The realization of these rigid joints is ensured by the rigid arms 20,21 of the backrest support 20 on the one hand and by the rigid back areas 3a and 3b on the other.
  • the degree of curvature of the bulge 6 of the lumbar support 5 increases in accordance with the maximum bulge 6 Fig. 1 in the minimum bulge 6 according to Fig. 2 from.
  • the by the four-bar chain 8 spanned surface increasingly smaller, as by comparing the representations of Fig. 1 and 2 is apparent.
  • the restoring force required for a reversible change of the bulge 6 of the lumbar support 5 is generated by a spring element, which can in principle be arranged at different points or positions of the four-bar chain 8.
  • a spring element which can in principle be arranged at different points or positions of the four-bar chain 8.
  • Fig. 3 Alternative positions and configurations of the spring element in the form of a leaf spring 9, a tension spring 10 and / or a leg spring 11.
  • this is expediently provided in the region of the lumbar support 5 and there in the region of the first joint 8a of the four-bar chain 8.
  • a leg spring 11 is expediently used in the region of the third joint 8c.
  • this backrest is provided between the two backrest areas 3a and 3b in the recess 7 extending transversely to the xz plane and connected there on the one hand to the upper backrest area 3a and on the other hand to the lower backrest area 3b.
  • a headrest 12 This consists essentially of a turn about L-shaped angled support or support frame 13 and an example pillow-like headrest main body 14.
  • the headrest 12 is held on the headrest main 14 remote from the L-leg 13a of the support frame 13 at the lower support arm 20 of the backrest support 2.
  • the L-leg 13b of the supporting frame 13, which is held between this L-leg 13a and the headrest main 14, is dimensioned such that the actual headrest, ie the headrest main 14 in a backrest position with a maximum convex lumbar support 5 in vertical or z-direction with the upper back portion 3a is aligned, as is out Fig. 3 is apparent.
  • the head restraint head 14 projects beyond in the in Fig. 4 Lehnenneigeposition shown the upper backrest portion 3a in the x direction.
  • FIGS. 5 and 6 show an embodiment of the realized in the functioning of the four-bar chain 8 backrest of the chair 1 with a synchronous mechanism 15 between the two backrest portions 3a, 3b and the seat surface 4.
  • the synchronous mechanism 15 essentially comprises two seat arms 16, 17, which are articulated on the seat carrier 18, which is indicated only schematically.
  • the front seat link 16 via hinges 16a and 16b with the seat surface 4 on the one hand or with the seat support 18 on the other hand hinged.
  • the rear seat link 17 via articulated joints 17a and 17b with the seat surface 4 on the one hand and the seat support 19 on the other hand hinged.
  • synchronous mechanism 15 causes a synchronous tilting movement of both the backrest and the seat surface 4 back and down.
  • the relationships relative to the backrest itself with respect to the relative movement between the two backrest portions 3a and 3b and the two-part backrest support 2 corresponds to the movement behavior of the backrest according to the Fig. 1 to 4 with a continuous decrease in the degree of curvature of the bulge 6 of the lumbar support 5 with increasing contact pressure F or pressurization with the difference that at the same time the backrest support 2 tilts backwards and downwards.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Claims (12)

  1. Dossier présentant deux sections de dossier (3a, 3b), qui, en formant une liaison articulée (8) à la manière d'une chaîne cinématique à quatre joints d'articulation ou d'un quadrilatère articulé, sont articulées sur un support de dossier (2) en deux parties comprenant un bras oscillant d'appui (20) inférieur et un bras oscillant de dossier (21) supérieur, de façon à ce que soit formé un appui lordosique (5) flexible entre les sections de dossier (3a, 3b),
    caractérisé par un appui-tête (12) comprenant une structure porteuse (13) maintenue sur le bras oscillant d'appui (20) du support de dossier (2), la structure porteuse (13) étant coudée de manière telle, que l'appui-tête (12, 14), dans une position initiale de dossier avec un appui lordosique (5) bombé au maximum, soit aligné, dans la direction verticale (z), avec la section de dossier supérieure (3a), et dans une position inclinée du dossier, dépasse de la section de dossier supérieure (3a) vers l'avant du dossier.
  2. Dossier selon la revendication 1,
    caractérisé en ce qu'un premier joint d'articulation (8a) de la liaison articulée (8), notamment du côté avant du dossier, est formé entre la section de dossier supérieure (3a) et la section de dossier inférieure (3b).
  3. Dossier selon la revendication 1 ou la revendication 2,
    caractérisé en ce qu'un deuxième joint d'articulation (8b) de la liaison articulée (8), notamment du côté avant du dossier, est formé entre la section de dossier inférieure (3b) et le bras oscillant d'appui (20) du support de dossier (2).
  4. Dossier selon l'une des revendications 1 à 3, caractérisé en ce qu'un troisième joint d'articulation (8c) de la liaison articulée (8), notamment du côté arrière du dossier, est formé entre le bras oscillant d'appui (20) et le bras oscillant de dossier (21) du support de dossier (2).
  5. Dossier selon l'une des revendications 1 à 4, caractérisé en ce qu'un quatrième joint d'articulation (8d) de la liaison articulée (8), notamment du côté arrière du dossier, est formé entre le la section de dossier supérieure (3a) et le bras oscillant de dossier (21) du support de dossier (2).
  6. Dossier selon l'une des revendications 1 à 5, caractérisé en ce que les deux sections de dossier (3a, 3b) sont constituées par des rembourrages de dossier au moins approximativement rigides à la déformation.
  7. Dossier selon l'une des revendications 1 à 6, caractérisé en ce que les deux sections de dossier (3a, 3b) sont maintenues l'une au-dessus de l'autre de manière articulée sur le support de dossier (2), de façon continue sur le côté avant du dossier, et à distance l'une de l'autre sur le côté arrière du dossier, en formant un contour d'appui en forme de S.
  8. Dossier selon l'une des revendications 1 à 7, caractérisé en ce que le bras oscillant d'appui (20) du support de dossier (2) est environ en forme de L, une aile (20a) du L étant reliée au support de dossier (21), tandis que l'autre aile (20b) du L est conçue pour la fixation d'une surface d'assise (4), et l'un des joints articulés (8b) de la liaison articulée (8) étant prévu
    dans la zone entre les ailes (20a, 20b) du L.
  9. Dossier selon l'une des revendications 1 à 8,
    caractérisé par un élément de ressort (9, 10, 11) pour produire une force de rappel (F) orientée dans la direction de la lordose d'une personne utilisatrice.
  10. Dossier selon la revendication 9,
    caractérisé en ce que l'élément de ressort, notamment un ressort à lame (9) ou un ressort spiral à branches (11), est prévu dans la zone de l'un des joints articulés (8a à 8d) de la liaison articulée (8), notamment dans la zone du premier ou du troisième joint articulé (8a respectivement 8b).
  11. Chaise ou siège (1), notamment siège de bureau, comprenant un dossier (2, 3) selon l'une des revendications 1 à 10, ainsi qu'une surface d'assise (4), le degré de bombé d'une partie bombée (6) d'un appui lordosique (5), dirigée vers le dos d'une personne, étant maximal dans le cas d'une position d'assise verticale d'une personne, et diminuant en fonction de la force de pression (F) exercée par la personne sur le dossier (3).
  12. Siège (1) selon la revendication 11, comprenant un mécanisme synchrone (15) destiné à assurer un mouvement d'inclinaison synchronisé du dossier (2, 3) et de la surface d'assise (4) suite à un pivotement du dossier (2, 3) d'une position initiale verticale vers une position inclinée, siège dans lequel avec un mouvement d'inclinaison croissant du dossier (2, 3) en réponse à la force de pression (F) exercée par une personne, le degré de bombé de la partie bombée (6) de l'appui lordosique (5) diminue.
EP08801543A 2007-09-15 2008-08-08 Dossier, en particulier de chaise de bureau Active EP2187782B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007044130A DE102007044130A1 (de) 2007-09-15 2007-09-15 Rückenlehne insbesondere eines Bürostuhls
PCT/EP2008/006559 WO2009033535A1 (fr) 2007-09-15 2008-08-08 Dossier, en particulier de chaise de bureau

Publications (2)

Publication Number Publication Date
EP2187782A1 EP2187782A1 (fr) 2010-05-26
EP2187782B1 true EP2187782B1 (fr) 2011-10-19

Family

ID=40202030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08801543A Active EP2187782B1 (fr) 2007-09-15 2008-08-08 Dossier, en particulier de chaise de bureau

Country Status (5)

Country Link
EP (1) EP2187782B1 (fr)
AT (1) ATE529020T1 (fr)
DE (1) DE102007044130A1 (fr)
ES (1) ES2375890T3 (fr)
WO (1) WO2009033535A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9004597B2 (en) 2012-09-20 2015-04-14 Steelcase Inc. Chair back mechanism and control assembly
KR20180064752A (ko) * 2016-12-06 2018-06-15 이상필 거북목 교정용 의자

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DE102007044130A1 (de) 2007-09-15 2009-03-19 König + Neurath AG Rückenlehne insbesondere eines Bürostuhls
US11229294B2 (en) 2012-09-20 2022-01-25 Steelcase Inc. Chair assembly with upholstery covering
US11304528B2 (en) 2012-09-20 2022-04-19 Steelcase Inc. Chair assembly with upholstery covering
US9706845B2 (en) 2012-09-20 2017-07-18 Steelcase Inc. Chair assembly
US8998339B2 (en) 2012-09-20 2015-04-07 Steelcase Inc. Chair assembly with upholstery covering
GB2543565B (en) * 2015-10-23 2019-10-09 Ratstands Ltd Stackable chair
DE102018109486A1 (de) * 2018-04-20 2019-10-24 Klöber GmbH Lordosenstütze für Sitzmöbel, vorzugsweise für Arbeitsstühle
WO2020172243A1 (fr) 2019-02-21 2020-08-27 Steelcase Inc. Ensemble support corporel et procédés d'utilisation et d'assemblage de cet ensemble
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
WO2021178206A1 (fr) 2020-03-02 2021-09-10 Steelcase Inc. Ensemble de support de corps et ses procédés d'utilisation et d'assemblage
WO2022173799A1 (fr) 2021-02-10 2022-08-18 Steelcase Inc. Structures de support corporel

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US7458637B2 (en) * 2004-06-10 2008-12-02 Steelcase Inc. Back construction with flexible lumbar
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DE102007044130A1 (de) 2007-09-15 2009-03-19 König + Neurath AG Rückenlehne insbesondere eines Bürostuhls

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GB2085719A (en) * 1980-08-20 1982-05-06 Antocks Lairn Ltd Adjustable chairs
US20060202534A1 (en) * 2005-03-08 2006-09-14 Heidmann Kurt R Seating with shape-changing back support frame

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9004597B2 (en) 2012-09-20 2015-04-14 Steelcase Inc. Chair back mechanism and control assembly
US9010859B2 (en) 2012-09-20 2015-04-21 Steelcase Inc. Chair assembly
US9022476B2 (en) 2012-09-20 2015-05-05 Steelcase Inc. Control assembly for chair
US9027998B2 (en) 2012-09-20 2015-05-12 Steelcase Inc. Chair assembly
US9027997B2 (en) 2012-09-20 2015-05-12 Steelcasel Inc. Chair assembly
US9027999B2 (en) 2012-09-20 2015-05-12 Steelcase Inc. Control assembly for chair
US9049935B2 (en) 2012-09-20 2015-06-09 Steelcase Inc. Control assembly for chair
USD742677S1 (en) 2012-09-20 2015-11-10 Steelcase Inc. Chair
USD742676S1 (en) 2012-09-20 2015-11-10 Steelcase Inc. Chair
US9345328B2 (en) 2012-09-20 2016-05-24 Steelcase Inc. Chair assembly with upholstery covering
US9451826B2 (en) 2012-09-20 2016-09-27 Steelcase Inc. Chair assembly
US9462888B2 (en) 2012-09-20 2016-10-11 Steelcase Inc. Control assembly for chair
US9492013B2 (en) 2012-09-20 2016-11-15 Steelcase Inc. Chair back mechanism and control assembly
KR20180064752A (ko) * 2016-12-06 2018-06-15 이상필 거북목 교정용 의자

Also Published As

Publication number Publication date
ATE529020T1 (de) 2011-11-15
WO2009033535A1 (fr) 2009-03-19
ES2375890T3 (es) 2012-03-07
EP2187782A1 (fr) 2010-05-26
DE102007044130A1 (de) 2009-03-19

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