EP0521972B1 - Mecanisme pour sieges - Google Patents

Mecanisme pour sieges Download PDF

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Publication number
EP0521972B1
EP0521972B1 EP91906797A EP91906797A EP0521972B1 EP 0521972 B1 EP0521972 B1 EP 0521972B1 EP 91906797 A EP91906797 A EP 91906797A EP 91906797 A EP91906797 A EP 91906797A EP 0521972 B1 EP0521972 B1 EP 0521972B1
Authority
EP
European Patent Office
Prior art keywords
mounting part
seat
arresting
hinge
shaft
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
EP91906797A
Other languages
German (de)
English (en)
Other versions
EP0521972A1 (fr
Inventor
Manfred Elzenbeck
Burkhard Vogtherr
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.)
Fritz Hansen AS
Original Assignee
Fritz Hansen AS
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 Fritz Hansen AS filed Critical Fritz Hansen AS
Publication of EP0521972A1 publication Critical patent/EP0521972A1/fr
Application granted granted Critical
Publication of EP0521972B1 publication Critical patent/EP0521972B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/445—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with bar or leaf springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/025—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame
    • A47C3/026—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame with central column, e.g. rocking office chairs; Tilting chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/441—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with adjustable elasticity

Definitions

  • the invention relates to a mechanism for attaching a seat of a swivel chair to a chair base according to the preamble of claim 1.
  • a mechanism is described in FR-A-2 267 068.
  • the movable fitting part In order to ensure that the movable fitting part can be freely pivoted, it has an obliquely positioned stop surface which, together with a counter surface fixed to the housing, forms a stop. In the rest position predetermined by the leaf spring arrangement, the two stop surfaces form a wedge-shaped gap, and a corresponding wedge-shaped locking slide can be moved into this.
  • DE-A-36 38 273 also discloses a latching adjustment for a rocking mechanism which comprises a toothed rack connected to a pivotable fitting part and a pivotable locking tooth which cooperates with the latter.
  • This locking mechanism is mechanically less resilient.
  • the present invention is therefore intended to further develop a seat mechanism according to the preamble of claim 1 be that it is compact and inexpensive to manufacture.
  • an optional lockability of the second fitting part in the rest position is obtained without any noteworthy additional costs, after locking lugs and the guide for the locking slide can be formed practically without additional costs when spraying the fitting parts (usually made of aluminum).
  • the hardness of the suspension can be adjusted by the user in a simple manner.
  • a bearing eye 14 sits on the upper end of the frame a total of 16 designated lower fitting part.
  • the bearing eye 14 is closed at the top by a plastic cap 18.
  • the lower fitting part 16 is an aluminum injection molded part and, when viewed from above, has the shape of a cut off isosceles triangle or trapezoid.
  • Two fitting arms 20, 22 run laterally outwards and upwards from the bearing eye 14.
  • Retaining sleeves 24, 26 are molded onto the free ends of the fitting arms 20, 22.
  • a hollow axis 28 is fixed in the holding sleeves 24, 26, on which joint sleeves 30, 32 are pivotably mounted.
  • the joint sleeves 30, 32 are molded onto the free ends of two fitting arms 34, 36, which belong to a pivotable upper fitting part, designated overall by 38.
  • the latter also has the shape of a cut-off isosceles triangle or trapezoid when viewed from above, the fitting arms 34, 36, viewed from above, running essentially parallel outside the fitting arms 20, 22.
  • the ends of the fitting arms 34, 36 lying away from the joint sleeves 30, 32 are connected to one another by a base section 40.
  • Four holes 42 in the upper fitting part 38 serve as fastening options for the seat of the swivel chair which is not shown in the drawing.
  • the axially outer end faces of the holding sleeves 24, 26 are in sliding contact with the axially inner end faces of the joint sleeves 30, 32, so that the fitting part 38 cannot be displaced relative to the fitting part 16 on the hollow axis 28.
  • a further joint sleeve 44 is arranged on the hollow axis 28 in the sliding play. This is integrally formed on a spring seat part designated overall by 46, which also comprises a tensioning wing 48 running tangentially from the lower end of the joint sleeve 44.
  • two recesses 50, 52 are provided symmetrically to the center plane of the seat mechanism, in which the first ends of a total of 54 and 56 designated leaf spring assemblies are accommodated.
  • the leaf spring assemblies 54, 56 each consist of a long leaf spring 58 lying at the top, which is guided to below the base section 40 of the upper fitting part 38 and engages on the base section 40 via a contact body 60 having a semicircular cross section.
  • the contact body 60 is a molded part made of a plastic material which is wear-resistant and has a low coefficient of friction with the material of the leaf spring 58. Collars 62 and 64 of the contact body serve to laterally position the ends of the leaf springs 58.
  • the leaf spring assemblies 54, 56 further comprise a central leaf spring 66, which extends approximately to the center of the upper fitting part 38, and a lower leaf spring 68, the length of which is approximately one third of the length of the leaf spring 58.
  • the leaf springs 58, 66, 68 all have the same width and thickness and are equally seated with their ends in the recess 50 and 52, where they are fixed by a screw 70 passing through them.
  • a support section 72 which connects the ends of the fitting arms 20, 22 and in which a nut 74 is fixed, is formed on the lower fitting part 16.
  • the thread of a threaded spindle 76 runs in this, the end of which is connected in a rotationally fixed manner to a handle 78.
  • the threaded spindle 76 passes through the tensioning wing 48 with play, and the top of the handle 78 engages via a ball bearing 80 on a cutting edge-like surface section 82 of the underside of the tensioning wing 48.
  • the leaf spring assemblies 54, 56 are accommodated in groove-shaped recesses 84 with play, which are formed in the underside of the support section 72.
  • the pitch of the screw drive formed by the threaded spindle 76 and the nut 74 is small (fine thread), so that one can easily change the angle at which the recesses 50, 52 are made against the force of the leaf spring assemblies 54, 56 by turning the handle 78 can. With this change in angle, the pretension of the leaf spring assemblies 54, 56 also changes.
  • FIG. 1 the course of the leaf spring assembly is shown by solid lines when the seat is unloaded and the medium pretensioning force. If you turn the handle 78 clockwise, you can increase the angle of the recesses 50, 52 to the horizontal, so that the leaf spring 58 then has the course indicated by dashed lines at 86. The pushing down of the upper fitting part 38 then requires a greater force.
  • the dash-dotted lines 88 indicate such a position of the upper fitting part 38 that is obtained by loading the seat.
  • Fitting rest position has the upper fitting part at the articulated ends of the fitting arms 34, 46 inwardly drawn stop sections 90 which cooperate with fixed stop sections 92 of the lower fitting part 16 which run away upward from the holding sleeves 24, 26.
  • the inner sides of the fitting arms 34, 36 carry locking sections 94 which, with play, can be moved away over locking sections 96 carried by the outer sides of the fitting arms 20, 22.
  • the lower boundary surface of the locking sections 94 lies a small distance D above the upper boundary surface of the adjacent locking sections.
  • a locking slide generally designated 100, can be moved. Its thickness is somewhat smaller than the distance D, so that arms 102 of the locking slide having the shape of a rectangular U can be inserted between the end faces of the locking sections 94, 96. In this position of the locking slide 100, the upper fitting part 38 can then no longer be pivoted downward
  • Moving the locking slide 100 can e.g. by means of a shaft 104 mounted in the interior of the hollow shaft 28, which carries radial actuating pins 106, which penetrate elongated holes (not shown) in the hollow shaft 28 and the holding sleeves 24, 26 in the circumferential direction and can be pivoted in driving openings (not shown) of the locking slide 100 intervention.

Landscapes

  • Chairs Characterized By Structure (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Materials For Photolithography (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

Un mécanisme pour sièges qui sert à monter de manière élastiquement inclinable le siège d'une chaise tournante sur un cadre inférieur (10) comprend une ferrure mobile (38) soutenue sur une ferrure fixe (16) par des groupes de ressorts à lames (54, 56). Les groupes de ressorts à lames (54, 56) s'étendent le long de la face inférieure de la ferrure mobile (38), formant un angle réduit avec celle-ci. L'inclinaison d'un support (46) des ressorts qui soutient une extrémité des groupes de ressorts à lames (54, 56) peut être ajustée au moyen d'une vis de réglage (74, 76), ce qui permet à l'utilisateur d'ajuster la précontrainte du groupe de ressorts à lames (54, 56).

Claims (4)

  1. Mécanisme pour fixer l'assise d'un siège tournant au bâti du siège, comprenant une première ferrure (16) pouvant être reliée au bâti (10), une seconde ferrure (38) pouvant être reliée à l'assise qui est portée par la première ferrure (16) par l'intermédiaire d'une articulation (24 à 32), une disposition de ressorts à lames (58); dont l'une des extrémités prend appui sur la première ferrure (16) et dont l'autre extrémité est appliquée contre la seconde ferrure (38), pour précontraindre la seconde ferrure (38) dans une position de repos supérieure, ainsi qu'un verrou d'arrêt (100) qui est supporté par la première ferrure (16), qui bloque la seconde ferrure (38) dans une position de travail et qui permet, en position de repos, de faire basculer la seconde ferrure (38) par rapport à la première ferrure (16), caractérisé en ce que la seconde ferrure (38) présente des parties d'arrêt (94) qui peuvent pivoter avec un jeu radial audelà de parties d'arrêt (96) adjacentes et fixes de la première ferrure (16) qui sont décalées radialement par rapport à l'axe de l'articulation (24 à 32), et en ce que, lorsque la seconde ferrure (38) est en position de repos, les surfaces de délimitation inférieures des parties d'arrêt (94) portées par la seconde ferrure se situent à une courte distance (D) au-dessus des surfaces de délimitation supérieures des parties d'arrêt (96) de la première ferrure (16) et cette courte distance (D) est légèrement supérieure à l'épaisseur du verrou d'arrêt (100), de sorte que, lorsque la seconde ferrure (38) est en position de repos, le verrou d'arrêt (100) peut se déplacer avec un faible jeu entre les parties d'arrêt (94) de la seconde ferrure (38) et les parties d'arrêt (96) de la première ferrure (16).
  2. Mécanisme d'assise selon la revendication 1, caractérisé en ce que l'articulation (24 à 32) présente : au moins une douille de retenue (24, 26) concentrique par rapport à l'axe de l'articulation sur la première ferrure (16), une barre (28) portée par les douilles de retenue (24, 26) et, sur la seconde ferrure (38), au moins une douille articulée (30, 32) montée de manière rotative sur la barre (28) ; et en ce que la barre (28) est une barre creuse dans laquelle est monté un arbre d'actionnement (104) portant des chevilles d'actionnement radiales (106) qui traversent des trous oblongs dans la barre creuse (28) et dans les douilles de retenue (24, 26) et s'encastrent dans des orifices d'entraînement du verrou d'arrêt (100) de façon à basculer de manière articulée.
  3. Mécanisme d'assise selon la revendication 1 ou 2, caractérisé en ce que deux douilles de retenue (24, 26) et deux douilles articulées (30, 32) sont prévues de façon symétrique par rapport au plan médian longitudinal du mécanisme d'assise et sont chaque fois en contact glissant par le biais de paires de surfaces frontales.
  4. Mécanisme d'assise selon la revendication 2 ou 3, caractérisé en ce qu'un support à ressort (46) supportant les premières extrémités de la disposition de ressorts à lames (58) est monté de manière rotative sur la barre (28), en ce que la première ferrure (16) présente une partie d'appui (72), et en ce que l'écart entre le support à ressort (46) et la partie d'appui (72) peut être réglé à l'aide d'une vis de réglage (74, 76) présentant, de préférence, un petit pas de vis.
EP91906797A 1990-03-28 1991-03-27 Mecanisme pour sieges Expired - Lifetime EP0521972B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE9003589U DE9003589U1 (de) 1990-03-28 1990-03-28 Sitzmechanik
DE9003589U 1990-03-28
PCT/EP1991/000597 WO1991014385A1 (fr) 1990-03-28 1991-03-27 Mecanisme pour sieges

Publications (2)

Publication Number Publication Date
EP0521972A1 EP0521972A1 (fr) 1993-01-13
EP0521972B1 true EP0521972B1 (fr) 1994-09-21

Family

ID=6852397

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91906797A Expired - Lifetime EP0521972B1 (fr) 1990-03-28 1991-03-27 Mecanisme pour sieges

Country Status (6)

Country Link
US (1) US5356199A (fr)
EP (1) EP0521972B1 (fr)
JP (1) JPH05508085A (fr)
AU (1) AU7570691A (fr)
DE (2) DE9003589U1 (fr)
WO (1) WO1991014385A1 (fr)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4326609C2 (de) * 1993-08-07 1996-03-28 Taipei Design Center Duesseldo Bürodrehstuhl
DE4421597A1 (de) * 1994-06-21 1996-01-04 Link Wilhelm Kg Stuhl, insbesondere Bürostuhl
US6250715B1 (en) 1998-01-21 2001-06-26 Herman Miller, Inc. Chair
AT411210B (de) * 2002-03-05 2003-11-25 Hansen Eckhard Dipl Ing Stuhl
US6880886B2 (en) 2002-09-12 2005-04-19 Steelcase Development Corporation Combined tension and back stop function for seating unit
US6869142B2 (en) * 2002-09-12 2005-03-22 Steelcase Development Corporation Seating unit having motion control
DE20319455U1 (de) 2002-12-31 2004-04-22 Metalseat S.R.L., Galliera Veneta Vorrichtung zur Einstellung der Federdruckkraft in einem Gelenk für Sitze
AT411962B (de) 2003-02-18 2004-08-26 Hansen Eckhard Dipl Ing Stuhl
US7806478B1 (en) * 2006-01-04 2010-10-05 Sava Cvek Task chair with dual tilting capabilities
CN102772051B (zh) * 2007-01-29 2016-05-18 赫尔曼米勒有限公司 座位结构及其使用方法
US8714646B2 (en) 2010-02-08 2014-05-06 Sava Cvek Mobile task chair and mobile task chair control mechanism with adjustment capabilities and visual setting indicators
US8714645B2 (en) 2010-01-28 2014-05-06 Sava Cvek Pivoting mechanism with gross and fine resistance adjustment
US9366433B2 (en) 2010-09-16 2016-06-14 Emerson Electric Co. Control for monitoring flame integrity in a heating appliance
AU2014227497B2 (en) * 2013-09-23 2019-06-27 King Furniture Australia Pty Ltd A chair
US10017082B2 (en) * 2014-06-06 2018-07-10 Francis Paul Zwaan Shock mitigation apparatus
ES2773199T3 (es) 2016-03-14 2020-07-09 Schmitz Bukhard Silla
US11071386B2 (en) 2016-06-09 2021-07-27 Sava Cvek Seat pivoting mechanism and chair height locking system
EP3927215A4 (fr) 2019-02-21 2023-03-15 Steelcase Inc. Ensemble support corporel et procédés d'utilisation et d'assemblage de cet ensemble
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
WO2021178206A1 (fr) 2020-03-02 2021-09-10 Steelcase Inc. Ensemble de support de corps et ses procédés d'utilisation et d'assemblage
US11812870B2 (en) 2021-02-10 2023-11-14 Steelcase Inc. Body support structure
IT202200001481A1 (it) * 2022-01-28 2023-07-28 Donati Spa Meccanismo di oscillazione per una sedia o poltroncina
US20240315448A1 (en) 2023-03-23 2024-09-26 Fellowes, Inc. Chair tilt system with leaf spring

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH285979A (de) * 1949-10-31 1952-09-30 Papst Hermann Sitzvorrichtung mit federnd nachgiebigem Sitz.
DE7510478U (de) * 1974-04-09 1976-09-23 Carmet, Ponte Sesto Di Rozzano, Mailand (Italien) Kipp-schwingvorrichtung fuer sitze, sessel u.dgl.
DE3638273A1 (de) * 1986-10-13 1988-04-21 Thonet Geb Gmbh Sitzmoebel
DE3800751A1 (de) * 1987-01-19 1988-08-04 Okamura Corp Sessel
GB8706806D0 (en) * 1987-03-23 1987-04-29 Mines & West Group Ltd Chairs
US4911501A (en) * 1989-06-09 1990-03-27 Harter Corporation Suspension mechanism for connecting chair backs and seats to a pedestal

Also Published As

Publication number Publication date
WO1991014385A1 (fr) 1991-10-03
AU7570691A (en) 1991-10-21
DE9003589U1 (de) 1991-07-25
DE59103051D1 (de) 1994-10-27
US5356199A (en) 1994-10-18
EP0521972A1 (fr) 1993-01-13
JPH05508085A (ja) 1993-11-18

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