EP3817628B1 - Siège - Google Patents

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Publication number
EP3817628B1
EP3817628B1 EP19745041.4A EP19745041A EP3817628B1 EP 3817628 B1 EP3817628 B1 EP 3817628B1 EP 19745041 A EP19745041 A EP 19745041A EP 3817628 B1 EP3817628 B1 EP 3817628B1
Authority
EP
European Patent Office
Prior art keywords
chair
bearing
seat
counter
spring
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.)
Active
Application number
EP19745041.4A
Other languages
German (de)
English (en)
Other versions
EP3817628A1 (fr
EP3817628C0 (fr
Inventor
Thomas Michelsen
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.)
Koenig and Neurath AG
Original Assignee
Koenig and Neurath AG
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 Koenig and Neurath AG filed Critical Koenig and Neurath AG
Publication of EP3817628A1 publication Critical patent/EP3817628A1/fr
Application granted granted Critical
Publication of EP3817628B1 publication Critical patent/EP3817628B1/fr
Publication of EP3817628C0 publication Critical patent/EP3817628C0/fr
Active 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
    • A47C1/03266—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 chair according to the preamble of patent claim 1.
  • a chair of the type mentioned is from the patent document JP2000116458A or the patent document DE 10 2007 059 985 B3 known.
  • These chairs consist of a chair base on which a seat and a backrest connected to the seat via a synchronous mechanism are movably mounted, with a spring pressing the seat into a basic position of the chair and an abutment rotatably mounted on the chair base being provided, the abutment being designed to interact on the one hand with a connecting element connected to a front edge of the seat and on the other hand with one end of the spring.
  • the spring is also designed to be positionable in different positions on the abutment for setting an effective spring force.
  • the front edge of the seat and also the abutment are arranged on a front seat link, which in turn is pivotably mounted on the chair base.
  • the object of the invention is to improve a chair of the type mentioned at the outset.
  • a chair is to be created in which, in contrast to the aforementioned prior art, the front edge of the chair does not lift when the backrest is loaded.
  • the connecting element interacting with the abutment is designed to be guided in a longitudinal guide and is arranged in the basic position of the seat in a highest position of the longitudinal guide.
  • the chair 10 is characterized in that the front edge of the seat is not raised when the chair is loaded thanks to the longitudinal guide and despite the simultaneous adjustability of the spring force via a rotatably mounted abutment.
  • the longitudinal guide is either completely horizontal when the chair is in an upright position (then the connecting element is in a highest position of the longitudinal guide in every position) or the longitudinal guide is designed to slope gently in comparison to the horizontal, starting from the highest position in the basic position, so that the front edge of the seat lowers at most when the chair is loaded, but never rises.
  • the abutment has teeth on the longitudinal guide side and that between the longitudinal guide and the teeth for force transmission between the spring and the seat an intermediate member, also called a force transmission device, which is also toothed on the toothed side and is pivotably mounted to the longitudinal guide, is arranged.
  • the chair shown consists, in a known manner, of a chair base 1, preferably provided with a foot 20, on which a seat 2 and a backrest 3 connected to the seat 2 via a synchronous mechanism are movably mounted, with a spring 4 pressing the seat 2 into a basic position of the chair and an abutment 5 rotatably mounted on the chair base 1, the abutment 5 being designed to interact on the one hand with a connecting element 7 connected to a front edge of the seat 2 and on the other hand with one end of the spring 4.
  • two seat supports 10 connected to one another via the connecting element 7 are particularly preferably provided, with the chair base 1 being arranged between the two seat supports 10 and the connecting element 7 being slidably mounted on the chair base 1 .
  • a backrest support 9 pivotable about a horizontal axis is mounted on the chair base 1 .
  • the backrest support 9 and the two seat supports 10 are preferably connected to one another via two swivel joints 11 which can be moved independently of the chair base 1 and have horizontal axes.
  • the connecting element 7 operatively connected to the seat 2 via the seat carrier 10 is operatively connected to the abutment 5 for the spring 4 .
  • the connecting element 7 interacting with the abutment 5 is designed to be guided in a longitudinal guide 8 and is arranged in the basic position of the seat in a highest position of the longitudinal guide 8 .
  • this requirement enables the Creation of a chair in which the front edge practically does not lower even under load.
  • the longitudinal guide 8 for the connecting element 7 when the chair is in use is formed so that it falls away, viewed from a front edge of the seat 2 in the direction of the backrest 3 .
  • the abutment 5 has a bearing surface 5.1 on which one end of the spring 4 can be positioned in different positions for setting an effective spring force.
  • an actuating element 6, which exclusively transmits tensile forces, is provided for fixing the position of one end of the spring 4 on the bearing surface 5.1.
  • the actuating element 6 is designed either as a chain (see FIGS. 1 to 14) or as a cable (not shown separately).
  • a groove 16 is particularly preferred on the abutment 5 (see in particular figure 9 ) intended. This is made wider than the actuating element 6 so that it is mounted in the groove 16 so that it can be displaced transversely.
  • an adjusting wheel 17 for adjusting the adjusting element 6 is particularly preferably provided on the abutment 5 and has an axis of rotation that runs horizontally when the chair is used. It is further particularly preferred that the adjusting wheel 17 is arranged on a rotating shaft 22 which is mounted on the abutment 5 so that it can rotate if necessary.
  • the longitudinal guide 8 it is also particularly preferred that, when the chair is in an upright position, it is designed to fall away from a front edge of the seat 2 in relation to the horizontal at an angle of around 10° towards the backrest 3. Furthermore, it is preferably provided that the longitudinal guide 8 is semicircular at both of its ends, matching the connecting element 7, which is designed as a cylindrical rod.
  • the spring 4 mentioned at the beginning which is particularly preferably designed as a helical compression spring and/or in the interior of which a telescopic guide 14 is arranged, it is also particularly preferred that one end of the spring 4 is connected to the abutment 5 and another end of the spring 4 is connected to a rotary bearing 12 provided on the chair base 1.
  • the spring 4 is designed to be rotatably mounted about a horizontal axis about the pivot bearing 12 , viewed in somewhat more detail.
  • a second spring 18, preferably also designed as a helical compression spring, is particularly preferably arranged between the connecting element 7 and the chair base 1 to specify a defined pretension, in the interior of which a telescopic guide 19 is preferably also arranged.
  • a basic tension is generated that keeps the chair in the front position despite the seat load, so that the spring force can be changed without the adjustment being blocked (see ratchet wheel and blocking element).
  • a pivot bearing 15 is particularly preferably provided on the chair base 1 (see in particular figure 10 ).
  • This rotary bearing 15, which preferably has a horizontal axis of rotation when the chair is in the upright position, is also arranged on an end of the abutment 5 facing away from the seat.
  • the pivot bearing 15 is arranged at one end of the abutment 5 and the connecting element 7 is designed to act on the other end of the abutment 5 .
  • the above-mentioned bearing surface 5.1 of the abutment 5, which is preferably divided into two elongated partial surfaces by the above-mentioned groove 16, is designed to be concavely curved towards the spring 4.
  • the spring 4 is formed at its abutment-side end with a slide 13 that is displaceable relative to the bearing surface 5.1 butting against the bearing surface 5.1.
  • the carriage 13, which is preferably designed to be firmly connected to the actuating element 6, is designed with a convex curvature on the abutment side to match the bearing surface 5.1.
  • the figures show that twisting the abutment 5 about its pivot bearing 15 causes the spring 4 to be compressed.
  • a position of the spring 4 adjacent to the pivot bearing 15 of the abutment 5 causes less compression of the spring 4 than a position of the spring 4 at a distance from the pivot bearing 15.
  • the bearing surface 5.1 is provided with a stop for the spring 4 or the carriage 13, viewed in both directions of adjustment of the spring 4.
  • a force transmission device 21 is also arranged between the connecting element 7 and the abutment 5 .
  • This serves, as can be seen in particular from the Figures 7 and 8 and the following description shows that the introduction of the force from the connecting element 7 to the abutment 5 always takes place parallel to the longitudinal guide 8 and thus practically without losses due to the toothing of the force transmission device 21, which is still to be explained.
  • the abutment 5 has a first toothing 5.2 with preferably at least three teeth on the force transmission device side, that the force transmission device 21 has a second toothing 21.1 with preferably at least four teeth on the abutment side and that the two toothings 5.2, 21.1 each have a convex curvature relative to one another and are designed to be at least partially in engagement with one another.
  • the abutment 5 is arcuate, in particular arcuate, and the power transmission device-side toothing 5.2 is arranged on a convex outside and the bearing surface 5.1 for the spring 4 is arranged on a concave inside of the abutment 5.
  • the force transmission device 21 is designed to be mounted on the connecting element 7 so as to be rotatable about an axis that is horizontally oriented when the chair is in the upright position.
  • the force transmission device 21 has a cylindrical through-opening that encloses the connecting element 7, in particular the aforementioned rod.
  • the force transmission device 21 is formed from two parts, each with a second toothing 21.1, leaving a free space for the actuating element 6 between them.
  • a displacement of the connecting element 7 causes a displacement and rotation of the force transmission device 21 .
  • a displacement and twisting of the force transmission device 21 causes a twisting of the abutment 5 about its pivot bearing 15 .
  • the adjusting element 6, which is preferably designed to be closed in itself, is guided around the abutment 5 or is designed to enclose this and preferably also the adjusting wheel 17 to be explained below.
  • the adjusting element 6 is designed as a rope, in particular a wire rope, and the adjusting wheel 17 has a guide groove that matches the rope and prevents the rope from slipping (in addition, cylinders or the like can be attached to the rope, for example, to prevent the adjusting wheel 17 from slipping).
  • the adjusting wheel 17 has an axis of rotation running parallel to the pivot bearing 15 of the abutment 5 .
  • an adjusting mechanism is also particularly preferably provided, to which in particular the rotary shaft 22 mentioned above belongs.
  • this is designed to be slidably mounted on the abutment 5 between two axial positions.
  • a spring element 23 for shifting the rotary shaft 22 into a first axial position is particularly preferably provided.
  • a first locking element 22.1 is particularly preferably provided on the rotary shaft 22, which in the first axial position with a provided on the abutment 5, second Latching element 5.3 is designed to work together.
  • the crown wheel toothing is designed as a sawtooth toothing, in such a way that in any case a movement of the carriage 13 on the bearing surface 5.1 in the direction of the pivot bearing 15 is or will be reliably prevented.
  • an actuating rod 24 operatively connected to the rotary shaft 22 is preferably provided.
  • an adjusting mechanism is preferably provided to bring about an axial displacement of the rotary shaft 22 into a second axial position.
  • This is preferably formed from a pin 24.1 provided on the actuating rod 24 and from a cam guide 22.2 provided on the rotary shaft 22 and cooperating with the pin 24.1.
  • the rotary shaft 22 preferably has a through-bore through which a part of the actuating rod 24 passes.
  • the actuating rod 24 is preferably rotatable but mounted on the abutment 5 in an axially non-displaceable manner.
  • a rotary movement on the actuating rod 24 causes the pin 24.1 to move along a wall of the cam guide 22.2.
  • This in turn leads to said axial displacement of the rotary shaft 22 and thus to the two latching elements 22.1, 5.3 detaching from one another, which then has the result that the adjusting wheel 17 can be rotated and thus the carriage 13 can be adjusted.
  • a locking mechanism preventing rotation of the rotary shaft 22 when the chair is loaded is also particularly preferably provided.
  • This is particularly preferably formed from a non-rotatable, but preferably axially displaceable, ratchet wheel 26 connected to the rotary shaft 22 and a slidably mounted on the abutment 5, spring-loaded and cooperating with the ratchet wheel 26 blocking element 27 (if, as in the illustrated embodiment, the blocking element 27 is designed wide enough, it is not necessary for the ratchet wheel 26 to be configured to be axially displaceable on the rotary shaft 22).
  • the ratchet wheel 26 has sawtooth teeth, again in such a way that any movement of the carriage 13 on the bearing surface 5.1 in the direction of the pivot bearing 15 is or is reliably prevented.
  • the adjusting wheel 17 is preferably designed to be firmly connected to the rotary shaft 22 , it is also preferably provided that the adjusting element 6 is designed to be slidably mounted at least in the area of the adjusting wheel 17 parallel to the axis of rotation of the abutment 5 .
  • guide elements are preferably provided on both sides of the actuating wheel 17 and each act on the actuating element 6 from the outside 28, preferably in the form of screw bolts.

Landscapes

  • 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 (9)

  1. Chaise, comprenant une base de chaise (1), sur laquelle une assise (2) et un dossier (3) assemblé avec l'assise (2) par l'intermédiaire d'un mécanisme synchrone sont montés de manière mobile, un ressort (4) qui pousse l'assise (2) dans une position de base de la chaise et une butée (5) montée de manière rotative sur la base de chaise (1) étant prévus, la butée (5) étant conçue pour interagir d'une part avec un élément d'assemblage (7) assemblé avec une arête antérieure de l'assise (2) et d'autre part, avec une extrémité du ressort (4), l'élément d'assemblage (7) qui interagit avec la butée (5) étant conçu en étant guidé dans un guidage (8) longitudinal et dans la position de base de l'assise, étant placé dans une position la plus haute du guidage (8) longitudinal, un coussinet de pivotement (15) étant prévu pour fixer la butée (5) sur la base de chaise (1),
    caractérisée en ce que
    le coussinet de pivotement (15) est placé sur une extrémité de la butée (5) et l'élément d'assemblage (7) est conçu en s'agrippant sur l'autre extrémité de la butée (5).
  2. Chaise selon la revendication 1,
    caractérisée en ce que
    lorsque la chaise est debout, le guidage (8) longitudinal pour l'élément d'assemblage (7) est conçu en déclivité, considéré à partir d'une arête antérieure de l'assise (2) en direction du dossier (3).
  3. Chaise selon la revendication 1 ou 2,
    caractérisée en ce que
    deux supports (10) d'assise assemblés l'un à l'autre par l'intermédiaire de l'élément d'assemblage (7) sont prévus, la base de chaise (1) étant placée entre les deux supports (10) d'assise et l'élément d'assemblage (7) étant monté en étant déplaçable sur la base de chaise (1).
  4. Chaise selon l'une quelconque des revendications 1 à 3,
    caractérisée en ce que
    sur la base de chaise (1) est monté un support (9) de dossier, susceptible de pivoter autour d'un axe horizontal.
  5. Chaise selon la revendication 3 et 4,
    caractérisée en ce que
    le support (9) de dossier et les deux supports (10) d'assise sont assemblés les uns aux autres par l'intermédiaire de deux articulations (11) rotatives, mobiles indépendamment de la base de chaise (1), comportant des axes horizontaux.
  6. Chaise selon l'une quelconque des revendications 1 à 5,
    caractérisée en ce que
    l'élément d'assemblage (7) assemblé en interaction avec l'assise (2) par l'intermédiaire des supports (10) d'assise est conçu en agissant en interaction avec la butée (5) pour le ressort (4).
  7. Chaise selon la revendication 6,
    caractérisée en ce qu'
    entre l'élément d'assemblage (7) et la butée (5) est placé un dispositif (21) de transmission de force.
  8. Chaise selon la revendication 7,
    caractérisée en ce que
    sur le côté du dispositif de transmission de force, la butée (5) comporte une première denture (5.2), en ce que du côté de la butée, le dispositif (21) de transmission de force comporte une deuxième denture (21.1) et en ce que les deux dentures (5.2, 21.1) sont incurvées respectivement de manière réciproquement convexe et sont conçues en étant engrenées l'une dans l'autre.
  9. Chaise selon la revendication 7 ou 8,
    caractérisée en ce que
    la butée (5) est conçue en forme d'arc et en ce que la denture (5.2) du côté du dispositif de transmission de force est placée sur une face extérieure convexe et la surface d'appui (5.1) pour le ressort (4) est placée sur une face intérieure concave de la butée (5).
EP19745041.4A 2018-07-02 2019-06-28 Siège Active EP3817628B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018115925.0A DE102018115925A1 (de) 2018-07-02 2018-07-02 Stuhl
PCT/DE2019/100604 WO2020007411A1 (fr) 2018-07-02 2019-06-28 Siège

Publications (3)

Publication Number Publication Date
EP3817628A1 EP3817628A1 (fr) 2021-05-12
EP3817628B1 true EP3817628B1 (fr) 2023-07-26
EP3817628C0 EP3817628C0 (fr) 2023-07-26

Family

ID=67441067

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19745041.4A Active EP3817628B1 (fr) 2018-07-02 2019-06-28 Siège

Country Status (5)

Country Link
EP (1) EP3817628B1 (fr)
CN (1) CN112384106B (fr)
DE (1) DE102018115925A1 (fr)
PL (1) PL3817628T3 (fr)
WO (1) WO2020007411A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021178206A1 (fr) 2020-03-02 2021-09-10 Steelcase Inc. Ensemble de support de corps et ses procédés d'utilisation et d'assemblage
WO2022173799A1 (fr) 2021-02-10 2022-08-18 Steelcase Inc. Structures de support corporel
DE102021107681A1 (de) * 2021-03-26 2022-09-29 Bock 1 Gmbh & Co. Kg Mechanik

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2627240B2 (ja) * 1993-02-24 1997-07-02 池田物産株式会社 車両用シート
DE19810768B4 (de) * 1998-03-06 2009-09-24 Drabert Gmbh Bürostuhl
JP3295651B2 (ja) * 1998-10-20 2002-06-24 株式会社イトーキクレビオ 椅子における部材の軸支構造
EP1172049A1 (fr) * 2000-02-18 2002-01-16 Sugatsune Kogyo Co., Ltd. Siege a dossier et dispositif amortisseur rotatif
AU2003239977A1 (en) * 2002-06-25 2004-01-06 Leggett And Platt, Incorporated Support for tilting or synchronized chairs
DE10357165A1 (de) * 2003-12-06 2005-06-30 Bock-1 Gmbh & Co. Synchronmechanik für Bürostühle
CN1984583A (zh) * 2004-06-14 2007-06-20 维特拉专利股份公司 带有同步机构的椅子
DE202007006762U1 (de) * 2006-10-13 2008-02-14 Bock 1 Gmbh & Co. Kg Mechanik für einen Bürostuhl
DE102007059985B3 (de) 2007-12-11 2009-04-09 Sedus Stoll Ag Vorrichtung zur Federkraftverstellung bei einem Bürostuhl
WO2018073222A1 (fr) * 2016-10-18 2018-04-26 Vitra Patente Ag Mécanisme synchronisé pour chaise et chaise comprenant un tel mécanisme

Also Published As

Publication number Publication date
DE102018115925A1 (de) 2020-01-02
EP3817628A1 (fr) 2021-05-12
WO2020007411A1 (fr) 2020-01-09
CN112384106A (zh) 2021-02-19
PL3817628T3 (pl) 2024-02-05
CN112384106B (zh) 2024-05-28
EP3817628C0 (fr) 2023-07-26

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