EP1989961B1 - Mécanisme de synchronisation pour chaises de bureau - Google Patents

Mécanisme de synchronisation pour chaises de bureau Download PDF

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Publication number
EP1989961B1
EP1989961B1 EP08007665A EP08007665A EP1989961B1 EP 1989961 B1 EP1989961 B1 EP 1989961B1 EP 08007665 A EP08007665 A EP 08007665A EP 08007665 A EP08007665 A EP 08007665A EP 1989961 B1 EP1989961 B1 EP 1989961B1
Authority
EP
European Patent Office
Prior art keywords
support
seat
coupling element
synchronisation mechanism
mechanism according
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
EP08007665A
Other languages
German (de)
English (en)
Other versions
EP1989961A1 (fr
Inventor
Herrmann 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 EP1989961A1 publication Critical patent/EP1989961A1/fr
Application granted granted Critical
Publication of EP1989961B1 publication Critical patent/EP1989961B1/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
    • A47C1/03255—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
    • A47C1/03261—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

Definitions

  • the invention relates to a synchronous mechanism for office chairs with the features specified in the preamble of claim 1, as is known from a variety of documents, such as DE 103 57 165 A1 or DE 36 35 044 A1 in its basic structure is known.
  • synchronous mechanism assemblies are understood in the seat base of an office chair, which provide for a mutually coupled, a certain relative movement of the seat and backrest with each other bringing kinematics.
  • a base support is placed on a chair column, to which on the one hand a pivotable about a transverse axis, hingedly connected to the base support seat carrier and on the other hand a pivotable about a transverse axis, hingedly connected to the base support backrest support are stored.
  • 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 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.
  • a fundamental issue with synchronous mechanisms is their spring action against the pivoting backwards.
  • a variety of spring designs is known from the prior art.
  • the construction according to DE 10 25 994 A1 provided spring assembly 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 invention is based on the object to provide a synchronous mechanism for office chairs with an improved adjustment, due to which the adjustment of the counter-spring force can be done with high ease of use, especially low effort and travel.
  • a coupling element arranged between the seat support and the support lever is provided for transmitting the pivoting movement of the seat support to the support lever.
  • the distance of the coupling element to the axes of rotation of seat support and support lever is now adjustable so that at a given pivot angle of the seat support results in a distance-dependent pivot angle of the support lever.
  • the compression of the compression spring is dependent on the distance of the coupling element to the axes of rotation of seat support and support lever.
  • the displaceable coupling element thus adds to a certain extent a displaceable transmission gear between seat support and compression spring, which is independent of the reaction force of the compression spring adjustable.
  • the adjustment mechanism does not have to work against the spring force, as is the case for example with a counterforce adjustment by a change in the bias of the spring.
  • the synchronous mechanism 1 as a supporting element on a base support 2, which in the region of its rear end with a cone seat 3 (see Fig. 6 ) is provided for attaching the synchronizing mechanism 1 to the upper end of a chair column 4 indicated by dashed lines.
  • Further basic components of the synchronous mechanism 1 are the backrest support 5 and the seat support 6.
  • the backrest support 5 is mounted in front of the cone seat 3 approximately centrally in the base support 2 via a transverse axis 7 pivotally mounted on the base support 2. He has two rearwardly extending side struts 8, 9, which include between them a receiving plate 10 for mounting the backrest, not shown.
  • the base support 2 extends from the cone seat 3 in an arc forward above (see Fig. 2 and 3 ), where formed in its front end portion of the substantially inverted, in plan view approximately rectangular pan seat support 6 with its front end portion via a hinge 11 (see Fig. 6 ) is attached.
  • the seat support 6 In its rear end region of the seat support 6 is also coupled to the backrest support 5 articulated.
  • the backrest support 5 In its rear end region of the seat support 6 is also coupled to the backrest support 5 articulated.
  • the backrest support 5 In its rear end region of the seat support 6 upwardly projecting bearing cheeks 12, 13 are formed, the outwardly projecting axle stub 14, 15 carry.
  • the backrest support 5 engages in corresponding receptacles in the seat support 6 and thus forms the in Fig. 4 and 5 indicated, transverse pivot axis 16 between the backrest 5 and seat support. 6
  • Fig. 2 shows the synchronous mechanism 1 in its normal position in which the seat support and thus the seat cushion unit (not shown) substantially horizontal and the backrest support 5 are arranged so that the backrest, also not shown, attached to the backrest support 2 is substantially upright.
  • the backrest support 5 is moved backwards downwards (in the clockwise direction according to FIG Fig. 2 and 3 ) is pivoted about the transverse axis 7.
  • the seat support 6 is pivoted in the pivoting direction S about the hinge 11 down.
  • the three components base support 2, backrest support 5 and seat support 6 then take the in Fig. 3 shown position with reclined seat cushion unit and swung backwards backrest a.
  • the synchronous mechanism 1 is subjected to a force by means of a designated as a whole by 17 spring arrangement against the synchronizing adjustment movement explained above.
  • the heart of this spring arrangement 17 is a central in the base support 2 in the vertical direction, open-wound helical compression spring 18, which is supported with its lower end to an abutment 19 in the base support 2 in front of the cone seat 3. With its upper end, the compression spring 18 is supported on the top wall 21 of the seat support 6 via a support lever 20 which will be explained in more detail below.
  • the seat support 6 pivots downward, whereby the helical compression spring 18 is compressed and generates a corresponding counterforce against the synchronizing movement.
  • each of a coupling element 24 supporting the adjusting slide 23 of the adjustment are mounted on a designated as a whole with 30 rack drive in the seat longitudinal direction L adjustable.
  • the downwardly facing edge of the lock slider 23 on a rack 31 which meshes with small diameter gears 32 in each case.
  • the latter are rotatably mounted on the axis 29, on the same centric a larger diameter gear 33 rotatably seated.
  • the latter is driven by a driven gear 34 on a transversely extending, arranged in the base support 2 adjusting shaft 35, at the free end of a hand wheel 36 for manual actuation of the adjustment assembly 22 is seated.
  • the support cheeks 27 are provided on their coupling element 24 facing upper side with a low-friction coating 37, for example made of PTFE, so that the trained in cross-section as a spherically shaped head coupling element 24 can slide particularly smoothly along the support cheeks 27.
  • a low-friction coating 37 for example made of PTFE
  • the lock slider 23 it is further provided that in the in Fig. 7 . 9 and 13 illustrated starting position of the spacer gap 38 between the top of the support cheeks 27 including covering 37 to the bottom 39 of the top wall 21 of the seat support 6 is slightly larger than the vertical extent d of the designed as a crowned coupling element 24.
  • Fig. 7 illustrated basic position of the synchronous mechanism 1, in which the coupling elements 24 are arranged on the adjusting slides 23 of the adjustment assembly 22 with a maximum distance a S , A A from the axes of rotation 11, 29 from the seat support 6 and support lever 20.
  • the synchronous mechanism 1 is activated by pivoting the backrest, the seat support 6 is pivoted about the axis of rotation (hinge 11). Due to the different axis of rotation of the support lever 20, the pivotal movement of the seat support 6 is transmitted via the coupling elements 24 on the support lever 20.
  • S S of the seat support 6 results in a maximum pivot angle S A ( Fig.
  • the adjusting arrangement 22 is actuated by means of the hand wheel 36 and the coupling elements 24 are moved from the in Fig. 7 shown starting position in the in Fig. 9 shown end position (distances a S 'and a A ' in Fig. 11 ).
  • the support lever 20 is more deflected due to the closer to its axis of rotation towards the coupling elements 24, as in Fig. 11 indicated by dashed lines.
  • the helical compression spring 18 is compressed at a constant swivel angle S S of the seat support 6 and the counter generated by it in the synchronous mechanism 1 counter -Feather force larger.

Claims (10)

  1. Mécanisme de synchronisation pour chaises de bureau comprenant
    - un support de base (2) pouvant être placé sur une colonne de chaise (4),
    - un support de dossier (5) articulé sur le support de base (2), pouvant pivoter autour d'un axe transversal (7),
    - un support de siège (6) qui peut pivoter autour d'un axe transversal avec le support de base (2) dans la zone de son extrémité avant par l'intermédiaire d'une articulation (11) et qui est couplé avec le support de dossier (5), pouvant pivoter autour d'un axe transversal (16) dans la zone de son extrémité arrière,
    - un ensemble de ressorts (17) pour l'amortissement du mécanisme de synchronisation contre son mouvement de déplacement synchronisé du support de siège (6) et du support de dossier (5), l'ensemble de ressorts (17) présentant un ressort de compression (18) qui est inséré entre le support de base (2) et un levier d'appui (20) pouvant pivoter avec le support de siège (6) pour l'amortissement du support de siège (6) contre sa direction de pivotement (S), ainsi
    - qu'un ensemble de réglage (22) pour la force d'opposition de l'ensemble de ressorts (17),
    caractérisé en ce que
    - l'ensemble de réglage (22) présente un élément de couplage (24) disposé entre le support de siège (6) et le levier d'appui (20) pour la transmission du mouvement de pivotement du support de siège (6) vers le levier d'appui (20), la distance (aS, aA) de l'élément de couplage (24) par rapport aux axes de rotation (11, 29) du support de siège (6) et du levier d'appui (20) pouvant être réglée de telle manière que, pour un angle de pivotement (SS) donné du support de siège (6), il résulte un angle de pivotement (SA) du levier d'appui (20) correspondant à la distance, et par conséquent un taux de compression du ressort de compression (18) correspondant à la distance.
  2. Mécanisme de synchronisation selon la revendication 1 caractérisé en ce que le levier d'appui (20) présente un plateau d'appui (25) pour le ressort de compression (18) se formant à son extrémité libre.
  3. Mécanisme de synchronisation selon la revendication 2 caractérisé en ce que le plateau d'appui (25) est flanqué d'au moins une paroi d'appui (27), de préférence est flanqué des deux côtés d'une paroi d'appui (27), pour le support d'au moins un élément de couplage (24).
  4. Mécanisme de synchronisation selon l'une des revendications précitées caractérisé en ce que l'élément de couplage (24) est disposé sur un curseur de réglage (23) qui peut être déplacé au moyen d'un entraînement (35, 36) pouvant être actionné manuellement pour le réglage de la distance de l'élément de couplage (24) par rapport aux axes de rotation (11, 29) du support de siège (6) et du levier d'appui (20).
  5. Mécanisme de synchronisation selon la revendication 4 caractérisé en ce que le curseur de réglage (23) peut être déplacé au moyen d'un entraînement à crémaillère (31, 32, 33).
  6. Mécanisme de synchronisation selon l'une des revendications précitées caractérisé en ce que l'entraînement à crémaillère (31, 32, 33) peut être entraîné par un arbre de réglage (35) pouvant être actionné manuellement par l'intermédiaire d'un engrenage (34, 33).
  7. Mécanisme de synchronisation selon au moins la revendication 3 caractérisé en ce qu'au moins une paroi d'appui (27) est munie d'un revêtement de faible friction (37) sur sa paroi d'appui (24) en face de son élément de couplage (24).
  8. Mécanisme de synchronisation selon les revendications 3 ou 8 caractérisé en ce que, dans la position de repos non étendue du mécanisme de synchronisation, la fente de l'espace (38) entre au moins une paroi d'appui (27) du levier d'appui (20) et le support de siège (6) est dimensionnée de sorte qu'elle est supérieure à l'épaisseur (d) de l'élément de couplage (24), il s'en suit que le levier d'appui (20) s'appuie directement sur le support de siège (6) et l'élément de couplage (24) peut être déplacé à l'état découplé par l'intermédiaire du ressort de compression (18) pour le changement de réglage de la force d'opposition (F) dans cette position de l'amortissement.
  9. Mécanisme de synchronisation selon au moins la revendication 4 caractérisé en ce que le curseur de réglage (23) et le levier d'appui (20) sont disposés en pouvant pivoter autour d'un axe (29) commun.
  10. Mécanisme de synchronisation selon l'une des revendications précitées caractérisé en ce que l'élément de couplage (24) est conçu sous la forme d'une tête en forme de balle sur le curseur de réglage (23).
EP08007665A 2007-05-07 2008-04-19 Mécanisme de synchronisation pour chaises de bureau Not-in-force EP1989961B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007021782A DE102007021782B3 (de) 2007-05-07 2007-05-07 Synchronmechanik für Bürostühle

Publications (2)

Publication Number Publication Date
EP1989961A1 EP1989961A1 (fr) 2008-11-12
EP1989961B1 true EP1989961B1 (fr) 2012-08-22

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EP08007665A Not-in-force EP1989961B1 (fr) 2007-05-07 2008-04-19 Mécanisme de synchronisation pour chaises de bureau

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EP (1) EP1989961B1 (fr)
DE (1) DE102007021782B3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11350750B2 (en) 2018-04-17 2022-06-07 L&P Property Management Company Tilt mechanism for a chair and chair

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009010234A1 (de) 2009-02-24 2010-09-02 Klöber GmbH Synchronmechanik für Bürostühle mit einer Einstelleinrichtung für die Anpassung der Rückstellkraft an das Benutzergewicht
DE102009016968B4 (de) 2009-04-14 2012-01-26 Votteler Designpartner Gmbh Sitzmöbel
DE102010046994B4 (de) * 2010-09-30 2023-01-12 Bock 1 Gmbh & Co. Kg Synchronmechanik
DE102011109374A1 (de) * 2011-08-04 2013-02-07 Bock 1 Gmbh & Co. Kg Stuhl mit Wippmechanik
DE102019113582B4 (de) * 2019-05-21 2022-06-15 Bock 1 Gmbh & Co. Kg Synchronmechanik

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8627482U1 (fr) * 1986-10-15 1989-07-06 Voelkle, Rolf, 7298 Lossburg, De
DE19509216A1 (de) * 1994-03-17 1995-10-12 Froescher Gmbh & Co Kg Stuhl oder Sitzeinrichtung
DE10033418A1 (de) * 2000-07-08 2002-01-31 Dauphin Friedrich W Gmbh Stuhl, insbesondere Bürostuhl
DE10125994A1 (de) * 2001-05-18 2002-11-21 Bock 1 Gmbh & Co Synchronmechanik für eine korrelierte Sitz-Rückenlehnen-Bewegung eines Bürostuhles
ITTO20030152A1 (it) * 2003-03-04 2004-09-05 Pro Cord Spa Sedia con sedile oscillante.
DE10357165A1 (de) * 2003-12-06 2005-06-30 Bock-1 Gmbh & Co. Synchronmechanik für Bürostühle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11350750B2 (en) 2018-04-17 2022-06-07 L&P Property Management Company Tilt mechanism for a chair and chair

Also Published As

Publication number Publication date
DE102007021782B3 (de) 2008-09-18
EP1989961A1 (fr) 2008-11-12

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