EP1941815B1 - Dispositif de direction couplée au mouvement pour une partie de siège, en particulier d'une chaise - Google Patents

Dispositif de direction couplée au mouvement pour une partie de siège, en particulier d'une chaise Download PDF

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Publication number
EP1941815B1
EP1941815B1 EP08000107A EP08000107A EP1941815B1 EP 1941815 B1 EP1941815 B1 EP 1941815B1 EP 08000107 A EP08000107 A EP 08000107A EP 08000107 A EP08000107 A EP 08000107A EP 1941815 B1 EP1941815 B1 EP 1941815B1
Authority
EP
European Patent Office
Prior art keywords
seat part
movement
support frame
joint lever
servo
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
EP08000107A
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German (de)
English (en)
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EP1941815A2 (fr
EP1941815A3 (fr
Inventor
Andras Dózsa-Farkas
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OMP Srl
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OMP Srl
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Publication date
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Publication of EP1941815A2 publication Critical patent/EP1941815A2/fr
Publication of EP1941815A3 publication Critical patent/EP1941815A3/fr
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Publication of EP1941815B1 publication Critical patent/EP1941815B1/fr
Expired - Fee Related 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
    • A47C1/03272—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

Definitions

  • the invention relates to a seat part with a motion-coupled servo device, in particular a chair, such as an office or work chair.
  • a chair in particular an office chair or work chair is known, which has a seat part, which is synchronously tiltable longitudinally displaceable and optionally with respect to the support frame forcibly guided tilted starting from a rest position in several tilt positions backrest part on a support frame.
  • a feedback device which is connected on the one hand with the free end of a support arm of the support frame and on the other hand with the seat part.
  • This feedback device can transmit feedback loads to the seat part and / or the backrest part in a largely lossless manner.
  • a gas spring device As an example of a feedback device, there is schematically shown a gas spring device.
  • a gas spring device takes up a relatively large amount of installation space and is relatively expensive. Also arise difficulties in the most uniform counterforce generation in the movement of the seat part and backrest part.
  • the invention therefore aims to provide a seat part with a motion-coupled servo device, in particular a chair, such as an office or work chair of the type mentioned, which in the most space-saving and weight-saving and cost-saving manner when using a mechanical spring device despite their progressive behavior allowed as even as possible Gegenkraftbeetzschlagung and allowed the most uniform movement of the seat part and backrest part in the longitudinal sliding movement relative to a support frame of such a chair.
  • a seat part with a motion-coupled servo device in particular a chair, provided, which is specified in claim 1.
  • the provided according to the invention seat part with motion-coupled servo device in such a chair is designed relatively flat construction thanks to the more articulated lever elements comprehensive, scissor-type articulated lever assembly and can be easily arranged below the seat part to save space.
  • the seat part moves as smoothly and smoothly as possible in its longitudinal sliding movement when a person takes place on the seat part and by appropriate body movements, the seat part and the backrest part adjusted to the desired inclination position.
  • the motion-coupled servo device provides approximately constant force transmission to the seat portion, in any position of the seat portion, the motion-coupled servo operates with substantially constant loading on all longitudinal displacements of the seat portion relative to the support frame. This also improves the ease of use, since the motion-coupled servo automatically ensures guidance and feedback of the seat part and the tilting backrest part.
  • the toggle lever assembly of the motion-coupled servo device comprises two first, intersecting and pivotally interconnected at the intersection pivotal elements whose one ends are rotatably mounted with respect to a supporting frame fixed support shaft and acted upon by a spring means, and the other ends, each having one end of at least two further second toggle elements are connected, the other ends are connected at a common pivot bearing point with the seat part.
  • This design is constantly changing relative angular changes in the toggle elements of the toggle assembly in each position of the seat portion to ensure a constant and a substantially constant power transmission to the seat portion.
  • this articulated lever assembly includes to achieve this approximately constant power transmission to the seat part exclusively mechanical elements free of gaseous or liquid media. This gives a reliable operation of the motion-coupled servo device with substantially constant properties.
  • the articulated lever assembly of the motion-coupled servo device comprises at least four toggle elements.
  • the toggle assembly is designed substantially symmetrically to a line passing through the connection points with the seat portion and the support frame.
  • the support frame fixed support shaft for the pivotal mounting of the ends of the first toggle lever elements is aligned substantially perpendicular to the longitudinal displacement direction of the seat part.
  • the available space below the seat part space can be used in an extremely favorable manner for the arrangement of the motion-coupled servo device.
  • a spring element in particular a spiral spring element, is assigned to each end of the first articulated lifting elements on the pivot bearing on the support frame fixed to the suspension spring.
  • the spring elements act evenly on the respective ends of the first toggle elements and gives a substantially uniform application of force by the spring elements.
  • each spring element is compressed in the longitudinal displacement of the seat part from the rest position.
  • the spring elements in the longitudinal displacement of the seat part from the rest position serve as a force storage, whereby optionally in an oppositely directed movement of the Seat part by this spring force of the spring elements an automatic return and return can be achieved.
  • the support frame fixed support shaft of the toggle lever assembly is arranged on a substantially perpendicular to a horizontal leg of the support frame extending support arm. This results in a largely central arrangement of the toggle lever arrangement based on the width extension of the seat part.
  • a locking device for the movement limitation of the seat part and backrest part is provided in predeterminable backrest part inclination positions.
  • This locking device allows the arrangement of the seat part and the backrest part to be optionally forcibly blocked in predetermined and preselected positions with respect to movement, so that the user of the chair can optionally set and display preselected setting positions as desired.
  • the toggle elements may be at least partially arcuate curved. This gives a shapely design of the toggle elements, which also have no protruding sharp edges, especially on the sides and ends of the lever elements, which could possibly lead to injury.
  • the spring device in the motion-coupled servo device according to the invention is designed such that it applies corresponding counterforces for variable body weights by variable bias.
  • variable bias a vote is made to different body weights of the persons who use the chair.
  • an adaptation to different body weights of the user person is realized by means of constructive means.
  • a seat part is provided with a motion-coupled servo device, which as smooth as possible and uniform entrainment of the seat part and the backrest part in the respective different positions allowed.
  • the servo device also serves as a return device and comprises a spring accumulator which serves as an energy storage according to the longitudinal movement of the seat part, which then ensures a substantially constant force transmission to the seat part in any position of the seat part with a corresponding counter-movement by relaxation.
  • the motion-coupled servo unit combines both a Federkraftbeetzwegung in the longitudinal movement and a power storage function with additional feedback properties.
  • FIGS. 1 and 2 the components of the basic construction will be explained in more detail with reference to an embodiment in the form of an office chair generally designated 1, which in the DE 10 306 851 shown and described which EP 1 596 691 B1 equivalent.
  • FIG. 1 is a foot frame 2, for example in the form of Primafußgestells, centered on a columnar part 3, which may include, for example, a gas spring or the like for height adjustment of the chair fußgestellmittig about a central center axis 4 rotatably connected to a support frame 5.
  • the support frame 5 is formed by a substantially U-shaped bent bracket 6, which has a horizontal leg 7 and at the ends of the horizontal leg 7 upstanding leg ends 8.
  • a support arm 9 is mounted, which extends approximately perpendicular thereto, and at its cantilevered free end 10 fixedly carries a third axis of rotation 11.
  • the two upstanding leg ends 8 carry stationary a first axis of rotation 12.
  • a return device 13 can be seen, which is for example in the form of a spring element, and whose one end fixed to the cantilever free end 10 of the support arm 9 and the other end in the horizontal direction spaced therefrom firmly connected to a seat part 14.
  • the office chair 1 comprises a backrest part designated as a whole by 15, to which a preferably L-shaped pivoting lever 16 is attached on both sides in the example shown.
  • a connecting member 17 is further attached, which is preferably formed integrally with the L-shaped pivot lever 16 and serves for connection to the seat part 14.
  • each connecting member 17 is provided, of course, only a central, centrally located connecting member 17 may be provided for cooperation with the seat part 14 in accordance with appropriate manner.
  • a sliding guide on the seat part 14 may be provided on its underside both sides each have a sliding guide 18 in the vicinity of the backrest portion 15 facing away from the end of the seat part 14.
  • the seat part 14 has a suitable fastening means 19 for an end of the return device 13 at a suitable location.
  • FIG. 1 shown skelethaft, perspective assembly view of the office chair 1 it can be seen that in the rest position or initial position of the chair 1 shown there, the support frame 5 with the upstanding leg ends 8 in conjunction with the L-shaped pivot lever 16 stationary forms the first axis of rotation 12 to the the Backrest part 15 can perform a tilting movement.
  • This first axis of rotation 12 is arranged at a predetermined distance of preferably 50 to 200 mm above the upper edge of the seat part 14 centered to the pedestal 2.
  • the backrest part 15 is movable via the connecting members 17 about a second axis of rotation 20 which is mounted on the seat part 14.
  • FIG. 2 is in a skeletal perspective overall view of the office chair 1 in its greatest inclination position, for example, 45 ° or more, starting from the in FIG. 1 shown rest position shown.
  • the first axis of rotation 12 is fixedly arranged on the support frame in this largest inclination position at a constant predetermined distance from the seat part 14, and also provided fußgestellmittig so that the center of gravity of a person sitting on the chair always largely centrally over the support frame 5 in all inclination positions the backrest portion 14 remains.
  • the connecting members 17 and the interaction of the second axis of rotation 20 is in synchronism with the tilting movement of the backrest portion 15, the seat portion 14 against FIG.
  • the connecting member 17 occupies a position approximately horizontal or in the same plane as the seat part 14.
  • the seat part 14 also takes its greatest possible, preferably upward inclination position of the seat part 14 by the interaction of the third axis of rotation 11 and slideways 18 on the seat part 14 a.
  • deviating inclination movements of the seat part 14 about the third rotation axis 11 can also be carried out, which depends on the corresponding design of the sliding guide or the sliding guides 18, which are provided on the seat part 14.
  • the spring element of the feedback device 13 assumes a maximum tensioned position, and the two ends of the return device 13 have the smallest distance from each other, in contrast to the in the rest position of the office chair 1 in FIG. 1 shown position the return device 13.
  • the center of gravity of the person sitting on this office chair 1 remains substantially centered above the base 2 to achieve the desired stability and safety, and the pivotal mounting of the backrest 15 about the first stationary pivot 12 remains at the desired predetermined distance above the top of the seat 14, so that this maximum inclination position of the backrest part 15 gives sufficient reliability and stability and stability to the entire office chair 1.
  • a motion-coupled servo generally designated 29, will be explained.
  • a total of 29 designated motion-coupled servo device comprises a toggle lever assembly 30, which in the illustrated example, two first toggle elements 31 and two second articulated lifting elements 38, so a total of four toggle lever elements 31, 38 includes.
  • this articulated lever assembly 30 is designed scissor-shaped.
  • the two first toggle elements 31 intersect at a crossing point 32 at which the toggle elements 31 are rotatably connected to each other.
  • the points of articulation of the ends 33 of the articulated lever elements 31 are rotatably mounted on a bearing frame fixed support shaft 34.
  • This support shaft 34 is fixedly mounted on the support frame 5 of the office chair, in the vicinity of the cantilevered free end 10 of the support arm 9, which extends approximately perpendicular to the horizontal leg 7 and arranged approximately in the middle thereof is.
  • the ends 33 of the articulated lever elements 31 is associated with a total of 35 designated spring means which are acted on both sides of the articulation points of the ends 33 on the supporting frame fixed support shaft 34 by spring elements 36 in the form of spiral spring elements of the spring device 35.
  • This spring device 35 causes a progressive Federkraftbeetzschung the toggle lever assembly 30.
  • the spring means 35 is designed such that it applies by a variable bias corresponding counter forces in coordination with different body weights.
  • 36 threaded sleeves can be assigned to the spring elements by means of which by twisting the applied by the spring elements 36 of the spring means 35 and acting on the toggle assembly 30 of the servo device 29 bias can be adjusted in a corresponding manner so that different body weights of a person sitting on the chair can be taken into account.
  • the other ends 37 of the first articulated lever elements 31 are also connected to one end 38a of two further articulated lever elements 38 also rotatably and articulated.
  • the other ends 38 b of the second toggle lever elements 38 are brought together to form a pivot bearing point 39, which is firmly connected to the seat part 14 of the office chair 1.
  • the sliding guides 18, by means of which the seat part 14 with respect to the support frame 5 forcibly guided in the synchronous longitudinal displacement with the backrest portion 15 is tilted are also schematically illustrated in the figures, the base frame 2, as it is designed for example in the form of a Gottfußgestells and fußgestellmittig the central center axis 4 ( FIGS.
  • the toggle assembly 30 is designed symmetrically to a schematically and broken registered line B, which goes through the common pivot bearing point 39 on the seat part 14 and through the intersection point 32 of the first toggle elements 31.
  • the support frame fixed support shaft 34 for the pivotal mounting of the ends 33 of the articulated lever elements 31 is substantially arranged perpendicular to the longitudinal displacement direction (arrow A) of the seat part 14.
  • FIGS. 4 and 6 the servo 29 is shown in the position in which the backrest part 15 is correspondingly FIG. 6 and FIG. 2 assumes its maximum inclination position and the synchronously hereby coupled seat part 14 occupies its most longitudinally shifted position.
  • the spring elements 36 of the spring means 35 at the position in FIG. 4 compressed and compressed, so that hereby a Federkraftbeetzschlagung the servo device 29 in the return direction with a corresponding movement of the backrest portion 15 and seat portion 14 can take place in the direction of rest position, since with the movement of the servo device 29 starting from the FIG. 3 to FIG.
  • the spring device 35 forms a force accumulator, which then generates a corresponding resultant application of force to the toggle lever arrangement 30 when the spring elements 36 relax.
  • the distance between the intersection point 32 of the first articulated lever elements 31 and the common pivot bearing point 39 on the seat part 14 has been shortened according to the longitudinal displacement of the seat part 14 in longitudinal displacement direction A.
  • the spring elements 36 of the spring device 35 were shortened by the compression. From the juxtaposition of FIG. 3 and FIG. 4 It can be seen that the seat part 14 covers a relatively large L Lucassverschiebungsweg, while the spring travel of the spring elements 36 of the spring means 35 in relation thereto is relatively small.
  • the plurality of articulated lever elements 31, 38 comprehensive, scissor-type articulated lever assembly 30 of the servo device 29 is designed such that in the progressive Federkraftbeetzstoffung by the spring elements 36 of the spring means 35 in each position of the seat part 14 is an approximately constant force transmission to the seat part 14, which is on the relative angular changes of the toggle elements 31, 38 is due to each other.
  • a locking device for the movement limitation of the seat part 14 and the backrest part 15 may be provided at predetermined angles for the backrest part inclination positions.
  • a suitable locking device could be assigned to the common pivot bearing point 39 on the seat part 14.
  • FIG. 7 is schematically shown in a plan view of an embodiment of a toggle lever assembly 30 ', which comprises first toggle elements 31' and second toggle elements 38 '.
  • the toggle elements 31 'and 38' of the toggle assembly 30 ' are at least partially arcuately curved to avoid protruding edges and to give the toggle assembly 30' a shapely appearance.

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

Claims (10)

  1. Assise (14) comportant un servomécanisme (29) couplé en mouvement, en particulier d'une chaise (1), l'assise (14) pouvant être déplacée longitudinalement sur un support (5) de façon synchrone par rapport à un dossier (15) qui peut être incliné à partir d'une position de repos en plusieurs positions d'inclinaison, et, le cas échéant, inclinée par guidage forcé par rapport au support, le servomécanisme (29) étant relié d'une part au support (5) et d'autre part à l'assise (14) et comprenant une structure à leviers articulés (30 ; 30') comportant deux premiers éléments des leviers articulés (31, 31') qui se croisent et sont reliés l'un à l'autre au point de jonction (32) par l'intermédiaire d'un palier rotatif, caractérisée en ce que les extrémités (33) des éléments des leviers articulés (31, 31') sont logées de manière rotative autour d'un arbre horizontal (34) fixe du support et en ce que les autres extrémités (37) sont reliées respectivement à une extrémité (38a) d'au moins deux autres éléments des leviers articulés (38, 38'), dont les autres extrémités (38b) sont reliées à l'assise (14), au niveau d'un point d'appui articulé commun (39), en ce qu'aux extrémités (33) des premiers éléments des leviers articulés (31, 31') est appliquée une tension progressive d'un ressort au moyen d'un dispositif à ressort (35) de manière qu'à chaque position de l'assise (14), une force à peu près constante est transmise à l'assise (14) du fait des changements d'angle entre les éléments des leviers articulés (31, 38 ; 31', 38') et en ce qu'à trajectoire de déplacement relativement importante de l'assise (14), on obtient un faible allongement du ressort lorsque la tension du ressort est appliquée.
  2. Assise (14) comportant un servomécanisme (29) couplé en mouvement suivant la revendication 1, caractérisée en ce que la structure à leviers articulés (30 ; 30') comprend au moins quatre éléments de leviers articulés (31, 38 ; 31', 38').
  3. Assise (14) comportant un servomécanisme (29) couplé en mouvement suivant la revendication 1 ou 2, caractérisée en ce que la structure à leviers articulés (30 ; 30') est conçue essentiellement symétriquement par rapport à une ligne B, qui passe par les points de liaison (39, 32) avec l'assise et le support (5).
  4. Assise (14) comportant un servomécanisme (29) couplé en mouvement suivant la revendication 1, caractérisée en ce que l'arbre horizontal (34) fixe du support servant au logement rotatif des extrémités (39) des premiers éléments des leviers articulés (31 ; 31') s'étend essentiellement perpendiculairement à la direction de déplacement (flèche A) de l'assise (14).
  5. Assise (14) comportant un servomécanisme (29) couplé en mouvement suivant la revendication 1 ou 4, caractérisée en ce que pour appliquer une tension de ressort, respectivement un élément à ressort (36), de préférence un élément à ressort hélicoïdal, est associé à chaque extrémité (33) des premiers éléments des leviers articulés (31 ; 31') au niveau du logement rotatif sur l'arbre horizontal (34) fixe du support (34).
  6. Assise (14) comportant un servomécanisme (29) couplé en mouvement suivant la revendication 5, caractérisée en ce que chaque élément à ressort (36) est comprimé lors du déplacement longitudinal de l'assise (14) hors de la position de repos.
  7. Assise (14) comportant un servomécanisme (29) couplé en mouvement suivant une des revendications 1 à 6, caractérisée en ce que l'arbre horizontal (34) fixe du support de la structure à leviers articulés (30, 30') est disposé sur un bras support (9) s'étendant essentiellement perpendiculairement à une branche horizontale (7) du support (5).
  8. Assise (14) comportant un servomécanisme (29) couplé en mouvement suivant une des revendications précédentes, caractérisée en ce qu'un dispositif d'arrêt est associé à des positions d'inclinaison du dossier prédéterminées pour limiter le mouvement de l'assise (14) et du dossier (15).
  9. Assise (14) comportant un servomécanisme (29) couplé en mouvement suivant une des revendications 1 à 8, caractérisée en ce que les éléments des leviers articulés (31', 38') sont conçus au moins partiellement arqués.
  10. Assise (14) comportant un servomécanisme (29) couplé en mouvement suivant une des revendications précédentes, caractérisée en ce que le dispositif à ressort (35) est conçu de manière à développer des forces antagonistes en adaptation à des poids corporels différents grâce à une précontrainte variable.
EP08000107A 2007-01-05 2008-01-04 Dispositif de direction couplée au mouvement pour une partie de siège, en particulier d'une chaise Expired - Fee Related EP1941815B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007001194A DE102007001194A1 (de) 2007-01-05 2007-01-05 Bewegungsgekoppelte Servoeinrichutng für ein Sitzteil, insbesondere eines Stuhls

Publications (3)

Publication Number Publication Date
EP1941815A2 EP1941815A2 (fr) 2008-07-09
EP1941815A3 EP1941815A3 (fr) 2009-04-15
EP1941815B1 true EP1941815B1 (fr) 2011-03-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08000107A Expired - Fee Related EP1941815B1 (fr) 2007-01-05 2008-01-04 Dispositif de direction couplée au mouvement pour une partie de siège, en particulier d'une chaise

Country Status (5)

Country Link
US (1) US7488040B2 (fr)
EP (1) EP1941815B1 (fr)
CN (1) CN101238933B (fr)
DE (2) DE102007001194A1 (fr)
HK (1) HK1120710A1 (fr)

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DE502008002922D1 (de) 2011-05-05
EP1941815A2 (fr) 2008-07-09
CN101238933A (zh) 2008-08-13
US20080164746A1 (en) 2008-07-10
CN101238933B (zh) 2010-06-02
HK1120710A1 (en) 2009-04-09
US7488040B2 (en) 2009-02-10
EP1941815A3 (fr) 2009-04-15
DE102007001194A1 (de) 2008-07-10

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