EP1537804B1 - Mécanisme synchrone pour chaise de bureau - Google Patents

Mécanisme synchrone pour chaise de bureau Download PDF

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Publication number
EP1537804B1
EP1537804B1 EP04025029A EP04025029A EP1537804B1 EP 1537804 B1 EP1537804 B1 EP 1537804B1 EP 04025029 A EP04025029 A EP 04025029A EP 04025029 A EP04025029 A EP 04025029A EP 1537804 B1 EP1537804 B1 EP 1537804B1
Authority
EP
European Patent Office
Prior art keywords
carrier
seat
spring
backrest
synchronising mechanism
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.)
Not-in-force
Application number
EP04025029A
Other languages
German (de)
English (en)
Other versions
EP1537804A1 (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 EP1537804A1 publication Critical patent/EP1537804A1/fr
Application granted granted Critical
Publication of EP1537804B1 publication Critical patent/EP1537804B1/fr
Not-in-force 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
    • 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
    • A47C1/03255—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
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03266—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with adjustable elasticity
    • 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

Definitions

  • the invention relates to a synchronous mechanism for office chairs with the features specified in the preamble of claim 1, as are known in part from DE 198 10 768 A1 or DE 101 25 994 A1.
  • the closest prior art represents US-A-4 653 806, from which the preamble of claim 1 is evident.
  • synchronous mechanism assemblies are understood in the seat base of an office chair, 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 be caused for example by leaning of the chair user to the backrest - induces 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.
  • the provided in the construction according to DE 101 25 994 A1 spring arrangement is based on two torsion springs, which are housed in the base support.
  • the one leg of the spring is housed in an adjustment in the base support, whereas the second leg projects upwards in the direction of seat support, which is supported via a corresponding abutment on this leg and thus acted against its rearward pivoting direction.
  • the spring arrangement has at least one tension spring, which is arranged substantially parallel to the sliding direction of the seat carrier, flat underneath the upper side of the seat carrier, and which is located between a tension spring base carrier fixed bearing and a backrest carrier fixed or preferably seat carrier fixed bearing is arranged.
  • the term "below the upper side” is to be understood to mean that the tension springs either under a cover formed by the top surface of the seat support, but also in an upwardly open recording of the usually complex of an injection molded part and integrally molded structural elements, such as stiffening ribs, axle mounts, etc. provided seat carrier can be arranged.
  • the tension springs are flat, parallel to the seat within the height contour of the substantially plate-shaped seat support.
  • the spring assembly extends virtually horizontally back along the seat support and the area below it remains available for other design and design parts of the chair in any way.
  • a base support 1 is provided as a supporting part, which is provided in the region of its rear end with a cone seat 2 for attaching the synchronizing mechanism to the upper end of a (not shown) chair column.
  • Further basic components of the synchronizing mechanism are the backrest support 3 and the seat support 4.
  • the backrest support 3 is mounted on the base support 1 so as to pivot about a transverse axis 5 just before the cone seat 2. He has two in an arc to the rear top extending side struts 6, 7, where the backrest, not shown, is attached.
  • the base support 1 takes in its side view (Fig. 1) on the arch shape of the backrest support 3 and leads to the front above, where in its front end a crosshead 8 is integrally formed.
  • This carries a transverse axis 9, which fulfills several functions, namely, on the one hand, the pivot-sliding support of the seat support 4 and, on the other hand, as an abutment for the tension spring arrangement 10 to be explained in more detail with the adjustment arrangement 12.
  • the tension springs 22 also have suspension lugs 25, which are opposite to the front suspension eyes 23 are rotated by 90 °. With these suspension eyes 25, the tension springs 22 are in turn suspended in the rear receiving hooks 26, the discussed in more detail below Way act as a position adjustable bearing of the adjustment assembly 12 for adjusting the bias of the tension springs 22.
  • the receiving hooks 26 are hinged in this respect with their ends facing away from the hook ends 27 28 on eccentrics 29. For this purpose, the joint ends 28 on a bearing bush 30, engage in the corresponding stub axle 31 of the eccentric 29. The pivoting direction of this joint is vertical.
  • the four eccentrics 29 are each provided with coaxially arranged above gears, wherein the so-called coupling gears 32.1, 32.4 are assigned to the two outer eccentrics 29.1, 29.4.
  • These coupling gears 32.1, 32.4 are each in engagement with a gearwheel 33.2, 33.3 arranged inwardly therefrom, which are rotationally coupled to the two inner eccentrics 29.2, 29.3.
  • the gears 33.2, 33.3 By a rotation of the gears 33.2, 33.3, for example clockwise and counterclockwise, the coupling gears 32.1, 32.4 are driven in opposite directions of rotation.
  • the main drive consisting of the eccentrics 29 eccentric arrangement via an actuator 34 which has a seat carrier 4 transversely to the seat longitudinal direction SL and horizontally extending, laterally projecting actuating shaft 35 which is rotatable about a non-illustrated operating knob at the end by hand.
  • the actuating shaft 35 has a threaded screw 36 which is in engagement with the gears 33.2, 33.3 and forms a worm gear 37.
  • the threaded screw 36 is divided into two opposing threaded portions 38.2, 38.3, so that rotate by rotation of the actuating shaft 35 and the worm gear 37 with the threaded sections 38.2, 38.3 engaged gears 33.2, 33.3 always in opposite directions of rotation D1, D2.
  • the rotational position of the two outer eccentrics 29.1, 29.4 is such that the receiving hooks 26.1, 26.4 are in their front dead center position.
  • the inner eccentric 29.2, 29.3 are in contrast rotated in its rotational position by 90 ° and thus stand so that the associated receiving hooks 26.2, 26.3 are displaced maximum far inward.
  • the tension spring assembly 10 is biased at least, thus producing the least resistance to pivotal movement of backrest support 3 and seat support 4 back down.
  • the distance between the front receiving hook 24 and the rear receiving hook 26 is increased, so that the tension springs 22 stretch under construction of a corresponding counterforce.
  • the eccentric 29 are further, since the outer springs 22.1, 22.4 are at the front dead center, no significant forces on the inner gears 33.2, 33.3 transmitted to the actuator 34. Furthermore, by the opposing threaded portions 38.2, 38.3 of the screw 36, the axial forces cancel each other in this, which due to the internal forces of the gears 33.2, 33.3 acting on the worm by the tensile forces of the springs 22 act. Overall, therefore, no significant forces transmitted by the action of the springs 22 on the actuating shaft 35, so that a smooth operation is guaranteed.

Claims (8)

  1. Mécanisme synchrone pour chaises de bureau, comportant:
    - un support de base (1) à monter sur une colonne,
    - un support de dossier (3) articulé sur le support de base (1) de manière à pouvoir pivoter autour d'un axe transversal (5),
    - un support d'assise (4) qui, dans la zone de son extrémité avant, est couplé par l'intermédiaire d'une articulation de rotation et coulissement (17) avec le support de base (1) de manière à pouvoir pivoter autour d'un axe transversal (11) et à pouvoir coulisser sensiblement dans la direction longitudinale de l'assise (SL), et qui, dans la zone de son extrémité arrière, est couplé avec le support de dossier (3) de manière à pouvoir pivoter autour d'un axe transversal (18, 19), ainsi que
    - un ensemble de ressorts (10) pour solliciter le mécanisme synchrone à l'encontre de son mouvement de réglage synchrone du support d'assise (4) et du support de dossier (3), l'ensemble de ressorts (10) comportant au moins un ressort de traction (24), qui est disposé sensiblement parallèlement à la direction de coulissement du support d'assise (4) à plat en dessous de celui-ci et qui est agencé entre un palier (24) solidaire du support de base et un palier (26) solidaire du support de dossier ou, de préférence, solidaire du support d'assise (4), et au moins un des deux paliers (26) étant réglable en position pour augmenter la longueur du ressort en vue de régler la précontrainte dudit au moins un ressort de pression (22),
    caractérisé en ce que chaque palier réglable est formé par un crochet de réception (26) qui est articulé contre un excentrique (29) rotatif.
  2. Mécanisme synchrone selon la revendication 1, caractérisé en ce que des ressorts de pression (22) en nombre pair, de préférence quatre ressorts de pression (22.1-22.4), sont agencés par paires et symétriquement par rapport au plan médian longitudinal (M) du mécanisme synchrone entre le support de base (1) et le support de dossier (3) ou, de préférence, le support d'assise (4).
  3. Mécanisme synchrone selon la revendication 1 ou 2, caractérisé en ce que ledit au moins un excentrique (29) est réglable par un système d'entraînement (34) par l'intermédiaire d'un engrenage à vis sans fin (37).
  4. Mécanisme synchrone selon la revendication 3, caractérisé en ce que l'engrenage à vis sans fin (37), par l'intermédiaire de parties de vis sans fin (32.2, 38.3) opposées, actionne deux ensembles d'excentriques (29.1, 29.2 et 29.3, 29.4), agencés symétriquement par rapport au plan médian longitudinal (M), pour deux ensembles de ressorts de traction (22.1, 22.2 et 22.3, 22.4) symétriques.
  5. Mécanisme synchrone selon la revendication 4, caractérisé en ce que chaque ensemble d'excentriques comporte deux excentriques (29) agencés latéralement côte à côte comportant chacun un crochet de réception (26) et un ressort de traction (22), sachant que les excentriques intérieurs (29.2, 29.3) sont entraînés chacun par l'intermédiaire de la roue dentée (33.2, 33.3), engrenant avec la vis sans vin (36), de l'engrenage à vis sans fin (37), et les excentriques extérieurs (29.1, 29.4) sont entraînés chacun par l'intermédiaire d'une roue dentée de couplage (32.1, 32.4) engrenant avec ladite roue dentée (33.2, 33.3).
  6. Mécanisme synchrone selon la revendication 5, caractérisé en ce que les deux crochets de réception (26.1, 26.2 et 26.3, 26.4) sont articulés dans des positions angulaires contre leurs excentriques (29), qui sont décalés de 90° les uns par rapport aux autres.
  7. Mécanisme synchrone selon l'une quelconque des revendications précédentes, caractérisé en ce que les paliers (26) réglables des ressorts de traction (22) sont disposés au niveau de l'extrémité arrière du support d'assise (4).
  8. Mécanisme synchrone selon l'une quelconque des revendications précédentes, caractérisé en ce que les paliers non réglables des ressorts de traction (22) sont formés dans la zone avant du support d'assise (4) par des crochets de réception (24) articulés contre le support de base (1).
EP04025029A 2003-12-06 2004-10-21 Mécanisme synchrone pour chaise de bureau Not-in-force EP1537804B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10357165A DE10357165A1 (de) 2003-12-06 2003-12-06 Synchronmechanik für Bürostühle
DE10357165 2003-12-06

Publications (2)

Publication Number Publication Date
EP1537804A1 EP1537804A1 (fr) 2005-06-08
EP1537804B1 true EP1537804B1 (fr) 2007-02-28

Family

ID=34442488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04025029A Not-in-force EP1537804B1 (fr) 2003-12-06 2004-10-21 Mécanisme synchrone pour chaise de bureau

Country Status (5)

Country Link
EP (1) EP1537804B1 (fr)
CN (1) CN100569144C (fr)
AT (1) ATE354992T1 (fr)
DE (2) DE10357165A1 (fr)
DK (1) DK1537804T3 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007040175B3 (de) 2007-05-07 2008-06-05 Bock 1 Gmbh & Co. Kg Synchronmechanik für Bürostühle
DE102007021782B3 (de) * 2007-05-07 2008-09-18 Bock 1 Gmbh & Co. Kg Synchronmechanik für Bürostühle
WO2010028412A1 (fr) * 2008-09-15 2010-03-18 Bene Ag Dispositif pour régler la résistance au pivotement d'un dossier
DE102009010234A1 (de) * 2009-02-24 2010-09-02 Klöber GmbH Synchronmechanik für Bürostühle mit einer Einstelleinrichtung für die Anpassung der Rückstellkraft an das Benutzergewicht
JP5724063B2 (ja) * 2010-12-27 2015-05-27 コクヨ株式会社 椅子
WO2013004253A1 (fr) 2011-07-01 2013-01-10 L&P Property Management Company Mécanisme d'inclinaison pour un siège et siège
CN102813392A (zh) * 2012-08-16 2012-12-12 中山凯美日用品有限公司 一种座椅之椅背角度调整定位装置
DE102014104870A1 (de) 2014-04-04 2015-10-08 Bock 1 Gmbh & Co. Kg Mechanik für einen Bürostuhl
DE102015214297B4 (de) * 2015-07-28 2023-03-23 Stabilus Gmbh Elektrisch verstellbarer Bürostuhl
CN105361484B (zh) * 2015-12-01 2017-11-24 中原工学院 一种定时可调椅子
DE102018115925A1 (de) * 2018-07-02 2020-01-02 König + Neurath AG Stuhl
DE102020101033A1 (de) 2020-01-17 2021-07-22 Bock 1 Gmbh & Co. Kg Träger für ein Sitzmöbel

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8401000U1 (de) * 1984-01-14 1984-04-05 Mauser Waldeck AG, 3544 Waldeck Drehsessel
US5106157A (en) * 1989-03-01 1992-04-21 Herman Miller, Inc. Chair height and tilt adjustment mechanisms
FR2674414B1 (fr) * 1991-03-26 1995-05-05 Lingranotto Ets Siege a dossier et assise synchronises.
DE19640564A1 (de) * 1996-10-01 1998-04-02 Stoll Sedus Ag Sitzmöbel mit neigbarem Sitz und Rückenlehne
DE19810768B4 (de) 1998-03-06 2009-09-24 Drabert Gmbh Bürostuhl
DE19823632C1 (de) * 1998-05-27 1999-09-30 Roeder Peter Stuhl, insbesondere Bürostuhl
DE19922442A1 (de) * 1999-05-07 2000-11-30 Sdm Hansen Ag St Margrethen Stuhl
DE20003313U1 (de) 2000-02-23 2001-07-05 Koenig & Neurath Ag Federeinheit zur Gewichtseinstellung eines Stuhls
CA2368923C (fr) * 2001-01-25 2006-03-14 Jsj Seating Company Texas, L.P. Fauteuil de bureau
DE10125994A1 (de) 2001-05-18 2002-11-21 Bock 1 Gmbh & Co Synchronmechanik für eine korrelierte Sitz-Rückenlehnen-Bewegung eines Bürostuhles
DE10241562A1 (de) * 2002-09-07 2004-03-18 Bock-1 Gmbh & Co. Synchronmechanik für Bürostühle

Also Published As

Publication number Publication date
ATE354992T1 (de) 2006-03-15
DE502004003024D1 (de) 2007-04-12
DE10357165A1 (de) 2005-06-30
CN100569144C (zh) 2009-12-16
EP1537804A1 (fr) 2005-06-08
CN1623471A (zh) 2005-06-08
DK1537804T3 (da) 2007-06-25

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