EP1258210B1 - Mécanisme synchronisé pour un mouvement correlé entre une siège et un dossier d'une chaise de bureau - Google Patents

Mécanisme synchronisé pour un mouvement correlé entre une siège et un dossier d'une chaise de bureau Download PDF

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Publication number
EP1258210B1
EP1258210B1 EP02009186A EP02009186A EP1258210B1 EP 1258210 B1 EP1258210 B1 EP 1258210B1 EP 02009186 A EP02009186 A EP 02009186A EP 02009186 A EP02009186 A EP 02009186A EP 1258210 B1 EP1258210 B1 EP 1258210B1
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EP
European Patent Office
Prior art keywords
carrier
backrest
seat
support
joint
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 - Fee Related
Application number
EP02009186A
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German (de)
English (en)
Other versions
EP1258210A3 (fr
EP1258210A2 (fr
Inventor
Hermann Bock
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.)
Bock 1 GmbH and Co KG
Original Assignee
Bock 1 GmbH and Co KG
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 Bock 1 GmbH and Co KG filed Critical Bock 1 GmbH and Co KG
Publication of EP1258210A2 publication Critical patent/EP1258210A2/fr
Publication of EP1258210A3 publication Critical patent/EP1258210A3/fr
Application granted granted Critical
Publication of EP1258210B1 publication Critical patent/EP1258210B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
    • A47C1/03274—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs of torsion type

Definitions

  • the invention relates to a synchronous mechanism for a correlated seat-backrest movement of an office chair with the features specified in the preamble of claim 1, as are known from DE 199 21 153 A1.
  • synchronous mechanism assemblies in the seat substructure of an office chair are understood, which provide for a coupled, a certain relative movement of the seat and backrest with each other bringing kinematics.
  • a base support is placed on a chair column, on which on the one hand a pivotable about a transverse axis, hingedly connected to the base support seat support and on the other hand also pivotable about a transverse axis, hingedly connected to the base support backrest support are mounted.
  • On the seat support of the usually provided with a padded seat seat of the office chair is mounted.
  • the backrest support which extends in a conventional manner from the actual synchronizing mechanism to the rear, carries on an upwardly extending arm, the backrest of the office chair.
  • Seat support and backrest support are coupled so articulated that a pivoting movement of the backrest to the rear - as it can bephysicsgeruten example, by leaning the Sruhlbenutzer to the backrest - induced a lowering movement of the rear edge of the seat down.
  • This correlated seat-back movement provides a significant comfort advantage and is desirable for orthopedic reasons.
  • a common problem with synchronizing mechanisms according to the prior art is the often very limited pivoting angle of the backrest.
  • the lowering of the seat is often too low, even with a relatively large backrest tilt angle, which is due to the pivotal mounting of the seat and backrest support in each case only one pivot joint on the base support.
  • the above objectives are achieved in the case of the above-mentioned publication provided for storage of the backrest support via a link assembly on the base support, which defines a four-bar chain.
  • the handlebar assembly consists of two hinged to the base support arms and the backrest support itself as a coupling of the four-bar chain.
  • the longitudinal axes of the two links are in an upwards to the seat opening, acute angle.
  • the backrest support in the form of a four-bar linkage, a large swing angle is basically achievable, the backrest support not only rotates about a fixed pivot axis, but performs an additional tilting movement to the rear. This turn-tilt movement is pronounced by the upwardly opening handlebars pronounced possible.
  • the seat support is articulated at its front end region via a welteren handlebar on the base support. In the upright position of the synchronizing mechanism, this handlebar is inclined forward. With its rear end portion of the seat support is hinged to the backrest support.
  • the present invention seeks to improve a synchronous mechanism of the generic type so that the initial stroke movement of the seat support is avoided under structural simplification.
  • the joint between the base support and seat support at the front end is formed as a rotary-sliding joint, which is designed so that the lowering movement of the seat support is superimposed on a horizontal sliding movement to the rear.
  • the rotary-sliding joint is formed by a horizontal, running in the longitudinal direction of the seat, slot-like link in the seat support, in which a bearing pin of the seat support is guided
  • a rotary-sliding joint in particular in the embodiment shown above, is structurally very simple to realize.
  • the base support by the outside attachment of the handlebar and the backrest support member also very compact and serve as a central "backbone" of the synchronous mechanism. It is created by the preferred embodiment of the handlebars as a widened fabric on the one hand, an additional design element, on the other hand reliably prevents jamming of the fingers in the synchronous mechanism from a health and safety point of view.
  • the basic structure of the synchronous mechanism designated as a whole by 1 is to be explained with reference to FIGS. 1 and 3. It therefore has a base support 2, which is set by means of a cone seat 3 on the upper end of a chair column 4. Outside and above the side, 1. Core pieces thereof are, on the one hand, a substantially frame-shaped seat support 6 and a backrest support 7, which is fork-shaped in plan view.
  • the seat support 6 is provided with a padded seat (not shown) ) assembled.
  • the backrest support 7 holds on an angled cross member 18 a backrest, also not shown, which is height adjustable in modern office chairs.
  • the entire synchronizing mechanism 1 is of mirror-symmetrical design with regard to the central longitudinal plane M with regard to the actual kinematics. In that regard, in the following description always be based on both sides pairwise existing construction elements.
  • the backrest support 7 is thus connected via a link arrangement articulated to the base support 2.
  • This link arrangement has a first link 8, which is articulated approximately centrally on a pivot bearing 9 on the base support 2.
  • a second link 10 is mounted between the front link 8 and cone seat 3 on a pivot bearing 11 on the base support 2.
  • the free ends of the two links 8, 10 are coupled via joints 12, 13 with the backrest support 7.
  • the two pivot bearings 9, 11 and the joints 12, 13 define a four-bar chain, in which the backrest support 7 with its respective fork leg 14 itself forms the coupling.
  • Fig. 1 basic position of the backrest support 7 of the front arm 8 is approximately vertically upwards, while the rear arm 10 is inclined backwards.
  • the two longitudinal axes 15, 16 of the links 8, 10 extending through the articulation points form an acute angle W (FIG. 1) of FIG a little over 30 °.
  • the length ratio between the front and rear links 8, 10 is about 2.5: 3. Due to the above interpretation and arrangement of the four-bar chain performs the backrest support 7 in Fig. 1 indicated by the arrow 17 superimposed rotary and pivotal movement back down ,
  • the seat support 6 is coupled in front of its rear end 19 with the backrest support 7 via a bearing eye 20 to the front joint 12 forming axis and articulated so with its rear end portion.
  • the joint between seat support 6 and backrest support 7 is thus integrated into the front joint 12 between the handlebar 8 and the backrest support 7.
  • the seat support 6 is connected to the base support 2 via a designated as a whole with 22 rotary-sliding joint.
  • This consists on the one hand of a in the two longitudinal bars 23, 24 (Fig. 3) molded, slot-like link 25, on the other hand from the inside a bearing pin 26 engages.
  • the latter is in each case formed on a bearing extension 27 of the base support 2 and is at right angles to the central longitudinal plane of M from this outwards and into the slot 25 into it.
  • the synchronous mechanism 1 is biased by a spring arrangement F opposite to the arrow 17 - ie to the basic position of the synchronous mechanism 1.
  • This spring arrangement F is in the form of two transversely aligned leg springs 28 (Fig. 3) which are positioned about the pivot bearing 9 of the front link 8 forming axis.
  • the upwardly pointing leg 29 is supported on a projection 30 on the seat support 6, while the second, forwardly extending leg 31 is supported in an adjustment mechanism 32 in the base support 2.
  • the torsion springs 28 exert a spring force against the rearward Pivoting movement of the backrest, which is variable by the adjusting mechanism 32 by means of actuation by a rotary lever 33.
  • the backrest support 7 performs at a loading of the backrest to the rear indicated by the arrow 17 pivoting rotational movement to the rear bottom, with the rear arm 10 of the four-bar chain on to the rear and the front handlebar 8 also turn backwards.
  • the angle W between the longitudinal axes 15, 16 of the two links 8, 10 is approximately 20 ° (FIG. 2).
  • the four-bar linkage thus, so to speak, folds in relation to the further spread starting position according to FIG. 1, so that this already compact arrangement is further reduced in size.
  • Contributing to the compact arrangement also contributes that the distance a of the two joints 12, 13, sitting between the backrest support 7 and the arms 8 and 10, approximately equal to the length L 10 of the rear arm 10 and in the ratio already indicated greater than the length L8 of the front link 8 is.
  • the synchronous mechanism 1 is otherwise designed so that in the swung-back end position shown in Fig. 2, the backrest support 7 passes through a pivot angle W7 of about 26 °, while the pivot angle W6 of the seat support 6 is about 15 °. It is noteworthy that changes the ratio of the tilt angle of the backrest and seat support during the pivoting movement. Thus, the ratio is initially at a value of about 3.5: 1, reduced about in the middle of the pivoting range to values around 2: 1, and finally at the end, ie at maximum pivoting, a ratio W7: W6 of about 1, 8: 1 to reach.
  • This has the advantage that a high Absenkwinkel of the seat support can be achieved without the tilt angle of the backrest must be too large, which would lead to a lie-like position.
  • the reason for this low end ratio of the swivel angle is the sliding movement of the seat support during lowering. Thus, the so-called "shirt extraction effect" is effectively avoided.
  • the externally mounted on the seat support 6 handlebars 8, 10 are formed as widened fabric approximately in kidney shape, wherein they are in all pivot positions between the two positions shown in FIG. 1 and 2 mutually and in conjunction with overlap the outside of the arms 8, 10 engaging bearing cheeks 34 of the fork-like backrest support 7 such that no fürgriffsemia between links 8, 10, base support 2 and backrest support 7 are present.
  • the fingers of the person sitting on the chair are effectively protected against pinching when pivoting the synchronous mechanism.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chairs Characterized By Structure (AREA)

Claims (6)

  1. Mécanisme synchronisé pour le mouvement interdépendant entre l'assise et le dossier d'un siège de bureau, comportant :
    - un support de base (2), apte à être monté sur une colonne de siège (4),
    - un support d'assise (6), apte à pivoter autour d'un axe transversal, relié par son extrémité avant (21) de manière articulée avec le support de base (2),
    - un support de dossier (7), qui est également apte à pivoter autour d'un axe transversal et est relié de manière articulée avec le support de base (2) et qui est couplé avec le support d'assise (6), de telle sorte qu'un mouvement de pivotement du dossier vers l'arrière induit un mouvement d'abaissement de la zone arrière du support d'assise (6),
    = le support de dossier (7) étant monté pivotant sur le support de base (2) par l'intermédiaire d'un système articulé (8, 10) définissant une chaîne cinématique à quatre joints articulés,
    = le système articulé (8, 10) étant formé par des biellettes (8, 10) avant et arrière, articulées contre le support de base (2), et par le support de dossier (7) lui-même en tant que bielle de la chaîne cinématique à quatre joints articulés, et
    = le support d'assise (6) étant articulé avec sa zone d'extrémité arrière (19) contre le support de dossier (7),

    caractérisé en ce que
    - le joint articulé entre le support de base (2) et le support d'assise (6) est réalisée sous forme de joint articulé coulissant (22), de telle sorte qu'un mouvement de coulissement horizontal vers l'arrière se superpose au mouvement d'abaissement du support d'assise (6).
  2. Mécanisme synchronisé selon la revendication 1, caractérisé en ce que le joint articulé coulissant (2) comporte une coulisse (25), qui est réalisée dans le support d'assise (6) sous forme de trou oblong orienté horizontalement dans le sens longitudinal et dans laquelle est guidé un tourillon (26) du support d'assise (6).
  3. Mécanisme synchronisé selon la revendication 1 ou 2, caractérisé en ce que le joint articulé entre le support d'assise (6) et le support de dossier (7) est intégré dans le joint articulé antérieur (12) entre la biellette avant (8) et le support de dossier (7).
  4. Mécanisme synchronisé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la distance (a) entre les deux joints articulés (12, 13) entre le support de dossier (7) et les deux biellettes (8, 10) est à peu près égale à la longueur (L10) de la biellette arrière (10) et supérieure à la longueur (L8) de la biellette avant (8).
  5. Mécanisme synchronisé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que les biellettes (8, 10) sont agencées de part et d'autre sur l'extérieur du support d'assise (6), le support de dossier (7) étant également assemblé à celles-ci par l'intermédiaire de joues d'appui (34) entrant en contact à l'extérieur avec les biellettes (8, 10).
  6. Mécanisme synchronisé selon la revendication 5, caractérisé en ce que les biellettes (8, 10), sur une vue en élévation par rapport à leurs axes d'articulation, sont conçues avec une structure plane élargie, de telle sorte que, quelle que soit la position relative de la chaîne cinématique à quatre joints articulés formée par celles-ci, il n'existe pas de possibilité de passage entre les biellettes (8, 10), le support de base (2) et le support de dossier (7).
EP02009186A 2001-05-18 2002-04-25 Mécanisme synchronisé pour un mouvement correlé entre une siège et un dossier d'une chaise de bureau Expired - Fee Related EP1258210B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10125994 2001-05-18
DE10125994A DE10125994A1 (de) 2001-05-18 2001-05-18 Synchronmechanik für eine korrelierte Sitz-Rückenlehnen-Bewegung eines Bürostuhles

Publications (3)

Publication Number Publication Date
EP1258210A2 EP1258210A2 (fr) 2002-11-20
EP1258210A3 EP1258210A3 (fr) 2004-01-14
EP1258210B1 true EP1258210B1 (fr) 2006-03-15

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EP02009186A Expired - Fee Related EP1258210B1 (fr) 2001-05-18 2002-04-25 Mécanisme synchronisé pour un mouvement correlé entre une siège et un dossier d'une chaise de bureau

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Country Link
US (1) US6886888B2 (fr)
EP (1) EP1258210B1 (fr)
DE (2) DE10125994A1 (fr)

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DE10241562A1 (de) 2002-09-07 2004-03-18 Bock-1 Gmbh & Co. Synchronmechanik für Bürostühle
ITMI20022194A1 (it) * 2002-10-16 2004-04-17 Icf Spa Sedia avente sedile e schienale mobili.
US20060290182A1 (en) * 2003-05-21 2006-12-28 Sergio Moreschi Modular mechanism for office chairs and the like
US7048335B2 (en) * 2003-06-05 2006-05-23 Steelcase Development Corporation Seating unit with crossbar seat support
DE10357165A1 (de) 2003-12-06 2005-06-30 Bock-1 Gmbh & Co. Synchronmechanik für Bürostühle
US6969116B2 (en) 2003-12-30 2005-11-29 Hni Technologies Inc. Chair with backward and forward passive tilt capabilities
US20090015050A1 (en) * 2004-03-13 2009-01-15 Hans Dehli Articulating chair
US20060138833A1 (en) * 2004-12-29 2006-06-29 Kerry Brodrecht Chair control for synchronized movement of chair seat and back, and chair having same
DE102005003383B3 (de) * 2005-01-24 2006-08-03 Bock 1 Gmbh & Co. Kg Synchronmechanik
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DE102006047889B4 (de) * 2006-10-10 2008-10-23 Interstuhl Büromöbel GmbH & Co. KG Sitzmöbel, insbesondere Bürostuhl
DE202007006762U1 (de) * 2006-10-13 2008-02-14 Bock 1 Gmbh & Co. Kg Mechanik für einen Bürostuhl
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DE102007059986A1 (de) * 2007-12-11 2009-06-18 Sedus Stoll Ag Bürostuhl
CN102098945B (zh) 2008-05-02 2013-11-06 霍沃思公司 用于重力响应式椅子的张力机构
DE102009010234A1 (de) * 2009-02-24 2010-09-02 Klöber GmbH Synchronmechanik für Bürostühle mit einer Einstelleinrichtung für die Anpassung der Rückstellkraft an das Benutzergewicht
DE202009006922U1 (de) * 2009-05-13 2010-09-23 Bock 1 Gmbh & Co. Kg Synchronmechanik
IT1403471B1 (it) * 2010-12-03 2013-10-17 Imarc Spa Meccanismo per sedie da ufficio provvisto di dispositivo di regolazione della forza di oscillazione.
USD697726S1 (en) * 2012-09-20 2014-01-21 Steelcase Inc. Chair
WO2015161281A1 (fr) 2014-04-17 2015-10-22 Hni Technologies Inc. Chaise et ensembles, systèmes et procédés de commande de chaise
US10159347B2 (en) * 2014-11-13 2018-12-25 L&P Property Management Company Tilt mechanism for a weight-responsive seating furniture
US11690455B2 (en) 2020-09-18 2023-07-04 Dinkar Chellaram Synchronous-tilt reclining chair

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DE19921153A1 (de) * 1999-05-07 2000-11-09 Bock 1 Gmbh & Co Synchronmechanik für eine korrelierte Sitz-Rückenlehnen-Bewegung eines Bürostuhles

Also Published As

Publication number Publication date
US20020171276A1 (en) 2002-11-21
EP1258210A3 (fr) 2004-01-14
EP1258210A2 (fr) 2002-11-20
DE50206055D1 (de) 2006-05-11
DE10125994A1 (de) 2002-11-21
US6886888B2 (en) 2005-05-03

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