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EP0279354B1 - Dossier réglable - Google Patents

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Publication number
EP0279354B1
EP0279354B1 EP88101995A EP88101995A EP0279354B1 EP 0279354 B1 EP0279354 B1 EP 0279354B1 EP 88101995 A EP88101995 A EP 88101995A EP 88101995 A EP88101995 A EP 88101995A EP 0279354 B1 EP0279354 B1 EP 0279354B1
Authority
EP
European Patent Office
Prior art keywords
pressure plate
backrest
shaft
deformable
fastened
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
EP88101995A
Other languages
German (de)
English (en)
Other versions
EP0279354A1 (fr
Inventor
Paul Gerhard Kemmann
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.)
Kemmann & Koch
Original Assignee
Kemmann & Koch
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 Kemmann & Koch filed Critical Kemmann & Koch
Priority to AT88101995T priority Critical patent/ATE74726T1/de
Publication of EP0279354A1 publication Critical patent/EP0279354A1/fr
Application granted granted Critical
Publication of EP0279354B1 publication Critical patent/EP0279354B1/fr
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
    • 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

Definitions

  • the invention relates to an adjustable backrest of a chair, armchair or the like according to the preamble of claim 1.
  • a backrest of this type is known from DE-A-29 35 352, the pressure plate being deformed by means of ropes which are fastened at different points on the pressure plate and are tensioned via separate adjusting devices.
  • the ropes running in a tendon shape to the curved pressure plate require a relatively large amount of space in the backrest.
  • a pressure plate articulated in a backrest is also known, which is deformable by a bracket which can be pivoted by a lever which can be actuated from the outside. In this case too, a certain amount of space is required due to the pivoting range of the bracket.
  • the invention has for its object to design an adjustable backrest of the type specified so that the ergonomic design of the backrest can be better adapted to the respective requirements of the user.
  • 1 denotes the backrest and 2 the seat of an armchair, wherein the backrest 1 can be arranged rigidly relative to the seat 2 or the inclination can be adjusted via a joint indicated schematically at 3.
  • a pressure plate 5 which consists of a deformable material and can be deformed and adjusted relative to the contact surface 4 by an adjusting device, is arranged in the contact surface 4 of the backrest 1 approximately at the level of the kidneys in the central region.
  • the pressure plate 5 is covered by the upholstery fabric 6 or padding of the backrest 1 so that it is not visible from the outside.
  • the pressure plate 5 can be pivoted about an axis indicated in FIG. 1 and 2 at 7, for example by means of a rotary knob 8, which is accessible outside the backrest.
  • FIG. 3a shows a view of a printing plate 5, which consists, for example, of a deformable plastic plate, which is provided with cuts 9 for easier deformability over most of its height dimension, so that individual resilient lamellae 10 result, which rest against the cover material 6, as shown in FIG.
  • the pressure plate 5 or the lamellae 10 can be preformed in the shape shown in FIG. 4 with a certain curvature.
  • Fig. 3b shows a front view of a pressure plate 5, which is rotatable on the lower edge portion about the axis 7 and is provided on the upper portion with two perpendicular to the axis 7, parallel guide slots 9 ', which in contrast to the incisions 9 closed at the upper edge are. Brackets 29, as shown in FIG. 6, engage in these incisions 9 or guide slots 9..
  • the pressure plate 5 is designed such that it is stiff or less easily preformable in the lower section adjacent to the pivot axis 7, while it is flexible or easier to deform in the remaining area up to the upper edge.
  • a material is preferably selected which has resilient properties. This different deformability over the height of the pressure plate can be achieved by the lamella formation indicated in FIG. 3a or also in that the pressure plate 5 has a certain thickness in the lower section and becomes increasingly thinner in the direction of the upper edge.
  • the pressure plate 5 has, for example, a constant thickness, and it is fastened in the lower section to a correspondingly shaped flat section 11 of a swivel part 12, which is fixed in the backrest 1 and can be pivoted about the axis 7 .
  • the swivel part 12 can be provided with a shaft 13 schematically indicated in FIG. 1, which is rotatably mounted in bearings 14 which are fastened in the rigid part of the backrest 1.
  • This shaft 13 can be connected on the outside to a rotary knob 8, which is displaceable in the axial direction relative to the shaft 13 and spring-loaded, so that a locking device, not shown, can be provided between the rotary knob 8 and the backrest 1, so that the Pivotal position of the shaft 13 can be set in the respective positions.
  • a support indicated in FIG. 4 at 27 can be provided for the free edge of the pressure plate 5, wherein this support 27 can be part of the frame of the backrest 1.
  • this support 27 the upper free edge is held in the pivoting direction when pivoting the pivoting part 12 or the lower portion of the pressure plate 5, so that the free edge only moves somewhat along the plane of this support 27, while the central portion of the pressure plate 5 in its curvature is changed.
  • the elongated holes 9 ⁇ in Fig. 3b with projections on the back of the support plate 27 are engaged. This prevents the free edge of the pressure plate 5 from moving so far downward relative to the lower edge of the support plate 27 that it can detach itself from this support.
  • a stop is formed for the curvature of the pressure plate to the outside.
  • a swivel part 12 made of sheet metal or plastic is provided, which is pivotably mounted with its swivel axis 7 on a support 21 which is fastened, for example, in the frame of the backrest 1.
  • This pivoting part 12 is provided with two lateral support arms 26, on which the pressure plate 5 rests or is fastened and which correspond to section 11 in FIG. Between these support arms 26, a curve section 22 is formed, which bears against a nut 23 is supported in a rotationally fixed manner on the carrier 21 via a stop 24 and is adjustable along a threaded spindle 25 which is rotatably mounted in the carrier 21 and is connected to a rotary knob 8.
  • the nut 23 is displaced in the axial direction of the threaded spindle, the pivot part 12 being pivoted via the curve section 22. It is also possible to provide an engaging part, for example a groove, on the curve section, which engages with a corresponding engaging part, for example a pin, on the nut 23, so that there is no spring action for the pivoting movement of the pivoting part 12 about the axis 7 the pivot part 12 is required. Usually, however, the elasticity of the cover fabric is sufficient to reset the pivoting part 12 or the pressure plate 5.
  • FIG. 6 shows an embodiment corresponding to FIG. 5, one or more brackets 29 being screwed into the wooden frame 28 of the backrest 1, each having a shaft and a widened head 30.
  • this holder engages in one of the slot-like incisions 9 or the elongated holes 9 ⁇ of the pressure plate 5, while the widened head part 30 engages over the lateral edges of the incision 9 or the adjacent slats 10.
  • the upper edge of the pressure plate 5 is held against the wooden frame 28 of the backrest 1, while the lower portion of the pressure plate can be curved further outwards.
  • the pressure plate 5 shown in FIG. 6 consists of a plastic plate with the same thickness throughout, the incisions 9 extending approximately over the upper third of the plate height.
  • the pressure plate 5 is preformed in the approximately S-shaped side view shown in FIG. 6, it being additionally possible for a curvature to be preformed perpendicular to the plane of the drawing, as indicated by the dashed lines. But it is also possible to provide a flat plate 5 in the relaxed state.
  • the pivoting part 12 comprises an angle iron, on the one leg of which the curve section 22 is formed, while the support arms 26 are fastened to the other leg.
  • the pressure plate 5 is fastened with the lower edge to the swivel part 12, wherein in the swivel position of the pressure plate 5 shown in FIG. 6 the support arms 26 are not yet in contact with the pressure plate, which is initially curved outwards only by swiveling the swivel part 12. With a greater curvature outwards, the support arms 26 come to rest on the pressure plate 5.
  • the carrier 21 is fastened with extensions 20 in an opening in the wooden frame 28, as shown in FIGS. 6 and 7a.
  • the axis 7 and the threaded spindle 25 are arranged one above the other in the carrier 21.
  • the threaded spindle 25 is followed by a flexible shaft section 31, to which a rigid shaft 32 is fastened, which is rotatably mounted at 14 on the frame of the backrest.
  • Fig. 7b shows the relaxed position of the pressure plate 5.
  • the knob 8 By turning the knob 8 clockwise, the nut 23 is moved to the left in Fig. 7b, whereby the pivot member 12 is pivoted outward through the curve portion 22 and thereby the pressure plate 5 is arched, as Fig. 6 shows.
  • FIG. 8 shows an embodiment of the fastening of the rotary knob 8 to the shaft 32, which has a slot 33 running in the axial direction at the engagement end.
  • This slotted end of the shaft 32 projects into a bore 34 in the frame 28 of the backrest.
  • a cover and bearing sleeve 35 is inserted into the bore 34 and fastened to the frame 28 by means of screws on a flange section.
  • the sleeve 35 has a centering section 36 for centering the shaft 32.
  • the rotary knob 8 is then plugged on, which is provided with a hub 37 provided with an inner bore.
  • a pin 38 which engages in the slot 33 of the shaft 32, leads across the bore of the hub 37.
  • a spring ring 39 is arranged in an annular groove, which engages with the inner circumference of the sleeve 35 and holds the rotary knob 8. This device simplifies assembly.
  • Fig. 7 shows a simple connection of the rotary knob 8 with the shaft 32 by means of a cross pin.
  • the lower edge of the pressure plate 5 is attached to the swivel part 12 facilitates the return movement of the pressure plate into the relaxed, flat starting position.
  • the pressure plate 5 is made of an elastic material.
  • the nut 23 is supported in FIG. 6 directly on the inside of the carrier 21 to prevent rotation.
  • the adjusting device for pivoting the pressure plate can also be designed in a different way.
  • the shaft 13 indicated in FIG. 1, which corresponds to the shaft 25, 32 in FIG. 7, can be connected directly to the pressure plate 5 in order to adjust it.
  • This pin or the nut can be connected to a rod which leads parallel to the shaft 13 and which is connected to an adjusting lever. By pivoting the adjusting lever, the shaft 13 can be pivoted over the helical groove and thus the pressure plate 5 can be adjusted.

Landscapes

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

Claims (6)

  1. Dossier réglable d'une chaise, d'un siège ou similaire, comportant une plaque de pression déformable (5), disposée dans la surface d'appui (4) du dossier (1) qui est déformable ou réglable par rapport au reste de la surface d'appui (4) au moyen d'un dispositif de réglage (8, 12) actionnable de l'extérieur, la plaque de pression (5) recouverte par la matière de revêtement (6) du dossier (1) étant fixée sur un élément pivotant (12) qui est logé à pivotement dans le dossier (1), et le dispositif de réglage comportant une broche (25), logée à rotation dans un support (21), pourvue d'une partie filetée qui peut être tournée de l'extérieur par une tête de rotation (8) et qui est vissée dans un écrou (23) qui s'appuie de façon fixe en rotation sur le support (21),
       caractérisé en ce que,
       l'écrou (23) est logé sur une partie incurvée (22) de l'élément pivotant (12) qui est logé à pivotement dans le support (21).
  2. Dossier selon la revendication 1,
       caractérisé en ce que,
       la plaque de pression (5) est déformable de façon rigide dans la partie inférieure dans la zone de son axe de pivotement (7) et est déformable légèrement et de préférence de manière élastique dans le reste de la zone.
  3. Dossier selon les revendications 1 et 2,
       caractérisé en ce que,
       la plaque de pression (5) est pourvue, dans la partie supérieure, de découpes (9) pour constituer des lamelles (10).
  4. Dossier selon les revendications 1 à 3,
       caractérisé en ce que,
       le bord supérieur de la plaque de pression (5) est tenu par un appui (27, 29).
  5. Dossier selon les revendications 1 à 4,
       caractérisé en ce que,
       l'élément pivotant (12) est pourvu de deux bras d'appui latéraux (26) sur lesquels repose ou est fixée la plaque de pression (5), la partie incurvée (22) étant formée entre les bras d'appui (26).
  6. Dossier selon les revendications précédentes,
       caractérisé en ce que,
       la tête tournante (8) est pourvue d'un moyeu (37) qui présente un alésage axial qui est traversé par une tige (38), le moyeu (37) pouvant être inséré à rotation dans une douille (35) insérable dans le cadre (28) du dossier et l'extrémité libre d'un arbre (32) étant pourvue d'une fente (33) pour recevoir la tige (38).
EP88101995A 1987-02-12 1988-02-11 Dossier réglable Expired - Lifetime EP0279354B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88101995T ATE74726T1 (de) 1987-02-12 1988-02-11 Verstellbare rueckenlehne.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8702174U DE8702174U1 (de) 1987-02-12 1987-02-12 Verstellbare Rückenlehne
DE8702174U 1987-02-12

Publications (2)

Publication Number Publication Date
EP0279354A1 EP0279354A1 (fr) 1988-08-24
EP0279354B1 true EP0279354B1 (fr) 1992-04-15

Family

ID=6804654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88101995A Expired - Lifetime EP0279354B1 (fr) 1987-02-12 1988-02-11 Dossier réglable

Country Status (4)

Country Link
US (1) US4810033A (fr)
EP (1) EP0279354B1 (fr)
AT (1) ATE74726T1 (fr)
DE (2) DE8702174U1 (fr)

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US4925242A (en) * 1989-09-01 1990-05-15 Scott Orthotic Labs, Inc. Adjustable lumbar back support system for a wheelchair
AT396055B (de) * 1989-12-18 1993-05-25 Austro Invest Sa Anatomisch formbare stuetze
DE4232679C1 (de) * 1992-09-29 1994-02-03 Ameu Management Corp Luxembour Rückenlehne eines Sitzes mit einer Verstellvorrichtung für ein elastisches Wölbelement zur Verstellung der Wölbung der Rückenlehne
US5651584A (en) * 1995-04-24 1997-07-29 L & P Property Management Company Lumbar support structure for automotive vehicle
DE19522682C2 (de) * 1995-06-22 1997-10-16 Daimler Benz Ag Federelastischer Körper für ein Sitzelement, insbesondere eines Fahrzeugsitzes
DE19533009C2 (de) * 1995-09-07 1999-03-25 Joerg Schwarzbich Betätigungseinrichtung für in Fahrzeugsitze integrierte Verstellmechanismen
US5868466A (en) * 1996-02-02 1999-02-09 Lear Corporation Flexible membrane back support
GB2334006B (en) * 1998-02-04 2002-01-02 Autoliv Dev Improvements in or relating to a safety arrangement
US6007150A (en) 1998-03-08 1999-12-28 Milsco Manufacturing Company Motorcycle seat with adjustable backrest
US5873632A (en) * 1998-04-06 1999-02-23 Aur Hann Co., Ltd. Pillow and backrest of chair
US6186594B1 (en) 1998-04-07 2001-02-13 Corporation De L'ecole Polytechnique Flexible contour wheelchair backrest
US6755467B1 (en) * 2000-06-20 2004-06-29 Global Total Office Conformable backrest for a chair
US6378942B1 (en) 2000-06-20 2002-04-30 Global Total Office Backrest with adjustable lumbar support
AU2001296422A1 (en) 2000-10-04 2002-04-15 North Pole Ltd. Two-position collapsible recliner
GB2400312B (en) * 2002-02-13 2006-07-26 Miller Herman Inc Back support structure
DE102004012850B4 (de) * 2003-10-01 2005-08-11 Leopold Schlosser Rückenlehne für eine Sitzvorrichtung, insbesondere für einen Drehstuhl
DE102005027922B3 (de) * 2005-06-16 2007-01-11 Schukra Gerätebau AG Lordosenstütze
US7517024B2 (en) * 2006-02-03 2009-04-14 Sava Cvek Post-assembly tension adjustment in elastomeric material applications
US8052213B2 (en) * 2006-07-03 2011-11-08 Milsco Manufacturing Company, A Unit Of Jason Incorporated Seat with adjustable seat occupant support assembly and integrally formed seat shell therefor
FR2905056B1 (fr) * 2006-08-24 2011-12-09 Services France Agence Sfa Siege a dossier adaptable permettant a une personne assise dans ce siege, de proceder au reglage dudit dossier au niveau de ses appuis dorsaux
US7604298B2 (en) * 2007-06-01 2009-10-20 Steelcase Development Corporation Chair back attachment and method of assembly
EP2252179B1 (fr) 2008-05-26 2012-07-11 Steelcase Inc. Dossier souple de siège
US7731286B2 (en) * 2008-09-01 2010-06-08 Yao-Chuan Wu Backrest assembly
EP2298131B1 (fr) * 2009-09-16 2015-04-08 Haworth GmbH Siège doté d'un réglage de profondeur d'assise
USD637423S1 (en) 2010-04-13 2011-05-10 Herman Miller, Inc. Chair
USD652657S1 (en) 2010-04-13 2012-01-24 Herman Miller, Inc. Chair
USD653061S1 (en) 2010-04-13 2012-01-31 Herman Miller, Inc. Chair
US8449037B2 (en) 2010-04-13 2013-05-28 Herman Miller, Inc. Seating structure with a contoured flexible backrest
USD650206S1 (en) 2010-04-13 2011-12-13 Herman Miller, Inc. Chair
USD657166S1 (en) 2010-04-13 2012-04-10 Herman Miller, Inc. Chair
USD639091S1 (en) 2010-04-13 2011-06-07 Herman Miller, Inc. Backrest
USD697726S1 (en) 2012-09-20 2014-01-21 Steelcase Inc. Chair
US11304528B2 (en) 2012-09-20 2022-04-19 Steelcase Inc. Chair assembly with upholstery covering
US9480339B2 (en) 2012-12-31 2016-11-01 Sava Cvek Seat with pelvic support
USD696545S1 (en) 2013-07-30 2013-12-31 Steelcase, Inc. Rear surface of a chair back
DE202015005732U1 (de) * 2015-08-12 2016-11-15 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Fahrzeugsitz für ein Fahrzeug
US10117518B2 (en) * 2016-04-01 2018-11-06 Exemplis Llc Lumbar support adjuster
CN105836465B (zh) * 2016-06-08 2018-03-27 盐城工学院 一种取料装置
CN107601024A (zh) * 2017-08-15 2018-01-19 吴杉镐 一种金属件抓取装置
AU2018333271A1 (en) * 2017-09-12 2020-03-12 The Tss Group Of Companies Pty Ltd Chair having adjustable back support
CN111942884B (zh) * 2020-08-18 2022-03-25 苏州鼎纳自动化技术有限公司 一种小工位多间距同步旋转机构
JP2023178152A (ja) * 2022-06-02 2023-12-14 田中　永一郎 椅子の背もたれ

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Also Published As

Publication number Publication date
ATE74726T1 (de) 1992-05-15
DE8702174U1 (de) 1987-04-30
EP0279354A1 (fr) 1988-08-24
US4810033A (en) 1989-03-07
DE3869992D1 (de) 1992-05-21

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