EP1396213B1 - Mécanisme synchronisé pour chaises de bureau - Google Patents

Mécanisme synchronisé pour chaises de bureau Download PDF

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Publication number
EP1396213B1
EP1396213B1 EP03020251A EP03020251A EP1396213B1 EP 1396213 B1 EP1396213 B1 EP 1396213B1 EP 03020251 A EP03020251 A EP 03020251A EP 03020251 A EP03020251 A EP 03020251A EP 1396213 B1 EP1396213 B1 EP 1396213B1
Authority
EP
European Patent Office
Prior art keywords
bearing
counter
synchronizing mechanism
mechanism according
seat
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
EP03020251A
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German (de)
English (en)
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EP1396213A1 (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
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Bock 1 GmbH and Co KG
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Publication date
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Publication of EP1396213A1 publication Critical patent/EP1396213A1/fr
Application granted granted Critical
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Anticipated expiration legal-status Critical
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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03294Reclining 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
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255Reclining 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
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03266Reclining 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
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272Reclining 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 im
  • the preamble of claim 1 specified features, as described in DE 198 10 768 A 1 or based on an earlier application of the Applicant DE 101 25 994 A1 are known.
  • synchronous mechanism assemblies are in the seat substructure of an office chair meant for a coupled, a certain relative movement of the seat and backrest to each other provide with bringing kinematics.
  • This is on a chair column a base support placed on the one to a pivotable about a transverse axis, hingedly connected to the base support seat support and on the other also pivotable about a transverse axis, hinged to the base support connected backrest support are stored.
  • On the seat carrier is the usually with a padded seat provided seat of the office chair assembled.
  • the backrest support which is commonly used by the Actual synchronous mechanism extends to the rear, contributes to one after Above extending boom, 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 for example caused by leaning on the chair user to the backrest can be - a lowering movement of the rear edge of the seat down induced.
  • This correlated seat-back movement brings one considerable comfort advantage with it and is for orthopedic reasons he wishes.
  • the invention is based on the object, a synchronous mechanism for Office chairs to improve so that the spring arrangements in a constructive Simplicity particularly compact and especially in a narrower spatial To arrange proximity under the seat carrier, so that the area of the base carrier essentially free, while achieving the greatest possible freedom of design remains.
  • the entire spring arrangement practically only about its front end with the remaining kinematics of Synchronous mechanism connected.
  • the spring arrangement projects virtually horizontally back along the seat support. Due to the flat design it has a very low height. Furthermore, since any fasteners missing in the direction of the backrest or base wearer Below, this section can be made of other design and design parts of the chair are received in any way.
  • the basic construction of the spring arrangement according to the abutment arm also allows preferred developments in which the adjustment the bias of the spring assembly in a simple manner bewerkstelligbar is. So the abutment boom needs only in the seat longitudinal direction be slidably mounted. By a longitudinal displacement changes the Position of the abutment for the rearward support of the helical compression spring, either stronger or weaker under corresponding Changing the bias voltage is compressed. Preferred dimensions becomes the displacement of the abutment arm by a control shaft with eccentric cam realized.
  • a further preferred embodiment is as a spring arrangement a spring assembly of several helical compression springs provided whose Total prestress by different gradation of the individual Eccentric cam of the control shaft can be varied in narrow steps.
  • abutment boom as rods in front, on which the helical compression springs are set up.
  • This can be the helical compression springs supported by a support strip on the abutment of the seat support, in a Bearing recess of the abutment is pivotally mounted slide.
  • the support the helical compression spring towards the seat support is improved by because due to the movement of the seat support plate back down at an actuation of the synchronous mechanism a certain tilt angle in to compensate for the support of the helical compression spring.
  • Further preferred embodiments relate to the training the bearing head of the respective abutment boom in the form of a frame, on the one hand for the storage of the abutment boom on the base support and on the other hand as an attack surface for the eccentric cam of the control shaft is used.
  • At least one Abutment boom provided at the rear end of an additional abutment which is adjustable in the seat longitudinal direction. So that can be on this abutment boom seated helical compression spring in its basic bias be varied, so that together with the adjustability the abutment boom itself at least two different drag ranges for adapting the synchronous mechanism to light or heavyweight persons are provided. Within this Areas can then about the actual adjustment of the abutment boom a fine adjustment be made.
  • the at least one Abstützausleger designed as a control shaft on the one hand by a Actuator on the base support rotatably driven and on the other hand with her provided at the rear end with an adjustable abutment stop is.
  • This is spindle-shaped by a shaft rotation in the direction of the spring force the helical compression spring adjustable so that only by the Actuation of the actuator, the bias of the helical compression springs is easily adjustable over wide ranges.
  • the actuator is controlled by a manually operable actuating shaft formed in the front area of the base, which has a Deflection gear is coupled to the front end of the control shafts.
  • a manually operable actuating shaft formed in the front area of the base, which has a Deflection gear is coupled to the front end of the control shafts.
  • a structurally simple storage of the adjusting waves results from that in a seated on a Umlenkgetriebewelle bearing bracket are rotatably mounted with their front end.
  • the reversing gear is for Achieving a compact design as a bevel gear between each a control shaft and one driven by the actuating shaft Transmission shaft formed.
  • a base support 1 is provided as the supporting part, in the area of its rear end with a cone seat 2 for attaching the synchronizing mechanism to the upper end of a (not shown) is provided chair column.
  • Other basic components of the synchronous mechanism are the backrest support 3 and the seat support 4.
  • the backrest support 3 is shortly before the cone seat 2 via a transverse axis. 5 pivotally mounted on the base support 1. It consists of two obliquely Rear top extending side struts 6, 7, the rear end in a only schematically indicated Lehnenbasis 8 open.
  • the substantially plate-shaped seat support 4 has in the region of his at the front two downwardly projecting, lateral cheeks 13, 14 on, the with a SL in the seat longitudinal direction to the rear slightly sloping slot 15, 16 are provided. With these slots 15, 16 sits the seat carrier 4 on the control shaft 11, whereby by the engagement of these two components a rotary-sliding joint 17 between base and seat support 1, 4 is formed is, d. H. the seat support 4 can pivot about the control shaft 11 and simultaneously relative to move in the direction of the slots 15, 16.
  • helical compression spring 24 For acting on the synchronous mechanism against the synchronous adjustment from the basic position shown in Figs. 1 to 4 out is designated as a whole with 23 spring arrangement, the four parallel to each other, on both sides of the central longitudinal plane M in a common horizontal plane arranged helical compression springs 24.1 to 24.4 (hereinafter referred to by the common reference numeral 24, unless a single helical compression spring is a separate discussion required).
  • helical compression spring 24 is in each case an abutment arm 25.1 to 25.4 provided, the front end pivotable relative to the base support 1 via a bearing head 26.1 to 26.4 is articulated.
  • the rod-shaped shaft of the abutment boom 25th protrudes freely to the rear and is there with an abutment projection 27 provided. At this the rear end of the Helical compression springs 24 from.
  • the abutment boom 25 pass with their rod-shaped shaft Support strip 28 in the rest via feedthrough openings 32nd
  • the bearing head 26 at the front end of the abutment arm 25 is as formed at least frame or box-shaped part, whose parallel to the seat longitudinal direction SL extending side frame walls 33 respectively are provided with a slot 34, with which the abutment boom 25th pivotable on the control shaft 11 and in the seat longitudinal direction SL relative thereto is slidably mounted.
  • Eccentric cam 35.1 to 35.4 rotatably connected to the control shaft 11, at the respective forward facing eccentric edge 36 each the front frame wall 37 of the bearing head 26 is supported.
  • the contact between the frame wall 37 and 36 Exzenterflanke is through Compressive force of the helical compression springs 24 secured.
  • an adjustable additional-Wider-camp 38 is provided. This is primarily about one transversely to the seat longitudinal direction SL vertically arranged, plate-shaped Slider 39, with two bearing holes 40 on the two inner abutment arms 25.2, 25.3 slidably guided in the seat longitudinal direction SL is.
  • This slider 39 is between the two helical compression springs 24.2, 24.3 and their abutment projection 27.2, 27.3 used. It acts with another eccentric cam shaft 41 together, the eccentric cam 42 is located centrally in the central longitudinal plane M and the slide 39 of applied to the rear.
  • these bearing struts 43 four upright standing bearing plates 44.1 to 44.4, which are aligned with each other Bearing eyes 45 are provided. In these sits the eccentric camshaft 41, which is actuated by a lateral knob 46.
  • the operation of the synchronous mechanism can be with reference to FIGS. 9 to 11 in conjunction with FIGS. 1 to 4 explain. This is how it works when pushing back pivoted the backrest of the backrest support 3 to the rear, the thus the seat support 4 back down around the turn-slide joint 17 pivots.
  • the support bar 28 moves closer to the end of the Ablagerausleger 25 out, so that the helical compression springs 24 stronger be compressed and thus build up a higher counterforce.
  • the Rotary sliding movement can be performed until the control shaft 11 at the rear end of the slots 15, 16 hit the seat support.
  • FIGS. 12 to 14 A second embodiment of a synchronous mechanism according to the invention is shown in FIGS. 12 to 14. To avoid repetition it should be noted in this context that the basic elements of the Synchronous mechanism, such as base support 1, backrest support 3 and seat support 4 with their mutual coupling via transverse axes 5, 22 and the Rotary sliding joint 17 with the embodiment according to FIGS. 1 to 11 to match. In this respect, for such constructive and functional matching elements in the embodiment of FIG. 12 to 14 matching reference numerals used and it will become an explanation related to the corresponding statements refer to Figs. 1 to 11.
  • the actuating shaft 52 with a gear 54 of a reduction gear 55 provided, the output-side gear 56 on a also mounted in the base support 1 intermediate shaft 57 is seated.
  • This intermediate shaft 57 is completed by coaxial attachable stub shaft 58, on each of which cone gears 59 sit.
  • the control shafts 51 are at their rear end respectively with threads 62 provided with which spindle nuts 63 are engaged. These spindle nuts 63 are by a common, transverse to the extension direction the adjusting shafts 51 extending abutment bar connected to the each helical compression springs 24 are supported with their rear end. Whose front end is - as in the embodiment of FIG. 1 - to one on the seat support 4 in a semicircular bearing shell (in FIGS. 12 to 14 not visible) pivotally mounted support bar 28 supported.
  • the support bar 28 sweeping the front Ends of the adjusting shafts 51 in bearing brackets 65 rotatably mounted in pairs are, in turn, with bearing extensions 66 on the intermediate shaft 57th are pivotally mounted.
  • the control shafts 51 are not just theirs Rotatable longitudinal axis, but also about the intermediate shaft 57 pivotally stored, so that the adjusting shafts 51, the slight tilting movement of the seat support 4 can perform at the bottom. In this movement is the seat support 4 with the support bar 28 against the force of the helical compression springs 24 shifted to the rear. This drag is through a Adjustment of the rear abutment bar 64 variable.
  • Figs. 12 to 14 components, such as two Stellwellen 51 on the left half of Figs. 12 and 14 and there located parts of the deflection gear 49, the left leg of the Backrest support 3 and the seat support 4 for better clarity the construction were omitted.

Claims (15)

  1. Mécanisme synchronisé pour chaises de bureau comprenant
    un support de base (1) pouvant être placé sur une colonne de chaise,
    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 de siège (4), qui est couplé au support de base (1) de manière à pouvoir pivoter dans la zone de son extrémité avant par l'intermédiaire d'une articulation de déplacement en rotation (17) autour d'un axe transversal (11) et à se déplacer dans la direction longitudinale de siège (SL) et au support de dossier (4) dans la zone de son extrémité arrière de manière à pouvoir pivoter autour d'un axe transversal (22), ainsi que
    un agencement de ressort (23) destiné à solliciter le mécanisme synchronisé à l'encontre du déplacement synchronisé de celui-ci par le support de siège (4) et de dossier (3),
       caractérisé en ce que
    l'agencement de ressort (23) comprend au moins un ressort de compression cylindrique (24) disposé sensiblement parallèlement à la direction de déplacement du support de siège (4),
    une console de butée (25) étant prévue pour chaque ressort de compression cylindrique (24), console dont l'extrémité avant est articulée sur le support de base (1) et dont l'extrémité arrière forme librement en saillie une butée (27) pour l'appui arrière du ressort de compression cylindrique (24), et
    l'un des ressorts de compression cylindriques (24) s'appuyant respectivement avec son extrémité avant sur une butée (28) formée sur le support de siège (4).
  2. Mécanisme synchronisé selon la revendication 1, caractérisé en ce que pour régler la précontrainte d'un des ressorts de compression cylindriques (24), la console de butée (25) associée est logée sur le support de base (1) de manière à pouvoir se déplacer dans la direction longitudinale de siège (SL).
  3. Mécanisme synchronisé selon la revendication 2, caractérisé en ce que la console de butée (25) avec une lanterne (24) est logée, de manière à pouvoir se déplacer sur le support de siège (4), sur un arbre de commande (11) formant l'axe transversal de l'articulation de déplacement en rotation (11), l'arbre de commande (11) supportant respectivement une came à excentrique (25) destinée à déplacer la console de butée (25) associée.
  4. Mécanisme synchronisé selon la revendication 3, caractérisé en ce qu'il est prévu un paquet de ressorts composé de plusieurs ressorts de compression cylindriques (24), dont la précontrainte totale peut être modifiée, par étapes précises, par l'échelonnement différent des cames à excentrique (35) individuelles de l'arbre de commande (11).
  5. Mécanisme synchronisé selon l'une quelconque des revendications précédentes, caractérisé en ce que les consoles de butée (25) sont conçues comme des tiges, sur lesquelles sont installés les ressorts de compression cylindriques (24).
  6. Mécanisme synchronisé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'un des ressorts de compression cylindriques (24) s'appuie sur une barre d'appui (28) s'étendant transversalement à la direction longitudinale de siège (SL) comme butée du support de siège (4), laquelle barre est logée de façon coulissante de manière à pouvoir pivoter dans un évidement de support (29).
  7. Mécanisme synchronisé au moins selon la revendication 3, caractérisé en ce que la lanterne (26) de la console de butée (25) respective est conçue comme un cadre, dont les parois de cadre (33) s'étendant parallèlement à la direction longitudinale de siège (SL) comprennent respectivement un évidement de support (34) en forme de trou oblong, au moyen desquels la console de butée (25) est logée de manière à pouvoir pivoter dans la direction longitudinale de siège (SL) sur l'arbre de commande (11).
  8. Mécanisme synchronisé selon la revendication 7, caractérisé en ce que la paroi de cadre (37) côté avant du cadre de lanterne (26) respectif est sollicitée par la came à excentrique (35) associée.
  9. Mécanisme synchronisé selon l'une quelconque des revendications précédemment citées, caractérisé en ce qu'au moins une console de butée (25) est pourvue sur l'extrémité arrière d'une butée additionnelle (38) pouvant être déplacée dans la direction longitudinale de siège (SL).
  10. Mécanisme synchronisé selon la revendication 9, caractérisé en ce que la butée additionnelle mobile est formée par un coulisseau (39) guidé de manière à pouvoir se déplacer sur la console de butée (25), lequel coulisseau peut être actionné par un arbre à cames à excentrique (41).
  11. Mécanisme synchronisé selon la revendication 10, caractérisé en ce que l'arbre à cames à excentrique (41) est aménagé sur un étai de support (43), qui s'étend depuis l'extrémité avant de la console de butée (25) vers l'arrière.
  12. Mécanisme synchronisé selon la revendication 1, caractérisé en ce que l'une des consoles de butée (25) est conçue comme un arbre de commande (51) pouvant être entraíné en rotation sur le support de base (1) par un mécanisme de commande (50), arbre sur l'extrémité arrière duquel est logée une butée (64) pouvant être déplacée dans la direction de la force élastique du ressort de compression cylindrique (24) à la façon d'une broche par une rotation de l'arbre.
  13. Mécanisme synchronisé selon la revendication 12, caractérisé en ce que le mécanisme de commande (50) comprend un arbre d'actionnement (52) disposé dans la zone avant du support de base (1) transversalement à la direction d'extension de l'arbre (des arbres) de commande (51), lequel arbre d'actionnement est couplé par l'intermédiaire d'une boíte de transmission intermédiaire (49) à l'extrémité avant de l'arbre (des arbres) de commande (51).
  14. Mécanisme synchronisé selon la revendication 13, caractérisé en ce qu'au moins deux arbres de commande (51) sont logés de manière rotative avec leur extrémité avant dans un étrier de support (65) reposant sur un arbre de boíte de transmission intermédiaire (49).
  15. Mécanisme synchronisé selon la revendication 12, caractérisé en ce que la boíte de transmission intermédiaire (49) comprend un engrenage à pignons coniques (61) entre l'un des arbres de commande (51) et un arbre de transmission (57).
EP03020251A 2002-09-07 2003-09-08 Mécanisme synchronisé pour chaises de bureau Expired - Lifetime EP1396213B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10241562 2002-09-07
DE10241562A DE10241562A1 (de) 2002-09-07 2002-09-07 Synchronmechanik für Bürostühle

Publications (2)

Publication Number Publication Date
EP1396213A1 EP1396213A1 (fr) 2004-03-10
EP1396213B1 true EP1396213B1 (fr) 2005-02-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03020251A Expired - Lifetime EP1396213B1 (fr) 2002-09-07 2003-09-08 Mécanisme synchronisé pour chaises de bureau

Country Status (6)

Country Link
US (1) US6796611B2 (fr)
EP (1) EP1396213B1 (fr)
AT (1) ATE288694T1 (fr)
DE (2) DE10241562A1 (fr)
DK (1) DK1396213T3 (fr)
ES (1) ES2236656T3 (fr)

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EP3903642A1 (fr) * 2016-06-10 2021-11-03 CO.FE.MO. Industrie S.R.L. Système d'articulation pour chaises

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US6796611B2 (en) 2004-09-28
DE10241562A1 (de) 2004-03-18
ES2236656T3 (es) 2005-07-16
US20040140703A1 (en) 2004-07-22
DK1396213T3 (da) 2005-05-02
ATE288694T1 (de) 2005-02-15
EP1396213A1 (fr) 2004-03-10
DE50300310D1 (de) 2005-03-17

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