EP0363833B1 - Chaise, en particulier chaise de bureau - Google Patents

Chaise, en particulier chaise de bureau Download PDF

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Publication number
EP0363833B1
EP0363833B1 EP89118551A EP89118551A EP0363833B1 EP 0363833 B1 EP0363833 B1 EP 0363833B1 EP 89118551 A EP89118551 A EP 89118551A EP 89118551 A EP89118551 A EP 89118551A EP 0363833 B1 EP0363833 B1 EP 0363833B1
Authority
EP
European Patent Office
Prior art keywords
seat
thorn
backrest
supporting arrangement
disposed
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
EP89118551A
Other languages
German (de)
English (en)
Other versions
EP0363833A1 (fr
Inventor
Günther Kuhn
Ullrich Kuhn
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0363833A1 publication Critical patent/EP0363833A1/fr
Application granted granted Critical
Publication of EP0363833B1 publication Critical patent/EP0363833B1/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
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable inclination
    • A47C1/0246—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable inclination by means of screw-and-nut mechanism
    • 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 mounted in a rigid frame
    • A47C3/026—Rocking chairs with seat, or seat and back-rest unit, elastically mounted in a rigid frame with a 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—Supports for the head or the back
    • A47C7/40—Supports for the head or the back for the back
    • A47C7/44—Supports for the head or the back for the back with elastically-mounted frame
    • A47C7/446—Supports for the head or the back for the back with elastically-mounted frame with fluid springs

Definitions

  • the invention relates to an armchair or chair, in particular an office armchair or chair, in which a supporting device for a seat and a backrest is rigidly attached to a column provided with a foot, which has a spatial arrangement with the seat, which is arranged directly rigidly on the supporting device Connected joint between the seat and the backrest and is further supported from the support device via intermediate members, the last of which is a console rigidly arranged at the lower end of the backrest, in such a way that it can be pivoted backwards against the force of a torsion spring unit and can be locked in various positions is, wherein a movement damper is arranged between the support device and a member moving relative to the support device when the backrest is pivoted.
  • Such an armchair or chair is known from German utility model 86 25 711.
  • the number of movable members is five and the number of joints is six.
  • a construction with five mutually movable links and five joints is known from GB-PS 2 195 238.
  • the invention has for its object to provide an armchair or chair with simplified mechanics.
  • this purpose is achieved starting from an armchair or chair of the type mentioned in such a way that the torsion spring unit is arranged as the joint and the motion damper is used as the only further intermediate member next to the console and at a distance from the torsion spring unit on the Carrying device and is hinged to the console and is a hydraulic movement damper with locking.
  • the number of moving parts as well as the joints is reduced to three.
  • the invention achieves the full possible advantage in the configuration that the torsion spring unit, although arranged spatially between the seat and the backrest, directly connects the support device to the console.
  • the entire mechanism located above the column then forms a finished unit from the only three movably connected parts, the support device, the console and the movement damper; the seat comes on the carrying device and the backrest on the console.
  • the invention achieves the full possible advantage in the configuration that the torsion spring unit, although arranged spatially between the seat and the backrest, directly connects the support device to the console.
  • the entire mechanism located above the column then forms a unit consisting of only three movably connected parts, the support device, the console and the movement damper.
  • the hydraulic movement damper is articulated with its piston rod on the carrying device, preferably in a two-legged bearing block, and it has a mandrel protruding from the piston rod, by means of which the movement damper is unlocked; for this purpose, a device for pressing in the mandrel is arranged under the seat with a hand lever arranged near a side edge of the seat.
  • the arrangement of the movement damper provided here already brings the mandrel under a front region of the seat, where the device for pressing in the mandrel does not need to bridge a large distance from the hand that grips in a comfortable position on the side and can be simple.
  • this device consists of a shaft provided with the hand lever, on which a cam for pressing in the mandrel is seated and which is preferably also mounted in the two-leg bearing block.
  • a leaf spring is arranged between the cam and the mandrel and the cam has a contact surface for the leaf spring such that the leaf spring holds the hand lever in the initial position by pressing on this contact surface, in which the Mandrel has its free end position locking the motion damper, and that the cam has a further curved contact surface for the leaf spring, with which the cam further tensions the leaf spring and presses the mandrel over the leaf spring into its depressed position in which it unlocks the motion damper.
  • the leaf spring has a multiple function. First, it secures the normal locking position. Here, however, it defines the starting position of the rotary lever together with the first-mentioned contact surface of the cam, without, as usual, a stop or the like. would be necessary. Due to their arrangement between the cam and the mandrel, only axial forces act on them; all transverse forces and frictional forces exerted by the cam are absorbed by the spring. The cam can therefore also have a design that would otherwise not be possible. The proposed device for pressing in the mandrel is particularly beneficial here, but could also be used to advantage in another mechanism.
  • the further arched contact surface mentioned is preferably arched concentrically to the shaft, so that after the mandrel has been pushed in, this is retained even when the hand lever is pivoted further and no clamping is produced. At the same time, however, the push-in position of the mandrel is retained even when the hand lever is released. That means the backrest remains flexible.
  • the chair or armchair will be height-adjustable in a manner known per se by means of a gas spring arranged in its column, at the upper end of which a mandrel protrudes, by means of which the gas spring can be unlocked, and a device for pressing in the mandrel under the seat have a hand lever located near a side edge of the seat.
  • the entire device serves the task of the invention, since it also consists of two parts in an extremely simple manner, but would otherwise also be usable with advantage.
  • the two-armed lever expediently consists of an angled rod which is mounted with one angle leg, preferably in a crank of the supporting device, and whose other angle leg forms the one lever arm, and from a sheet metal plate attached to the former angle leg and covering the mandrel of the gas spring, that forms the other lever arm.
  • FIG. 3 also an upper back section; in Fig. 4 sections of the seat have broken away.
  • a support device 2 for a seat 3 and a backrest 4 is rigidly attached to an upper telescopic member 1 of the chair column.
  • the carrying device 2 consists of a bent and laterally folded sheet metal plate 6 connected to the telescopic member 1 via a short U-section 5.
  • the U-section 5 lies with its back 7 (FIG. 2) on the end face of the telescopic member 1 and with the edges its legs on the bottom 8 of the offset of the sheet metal plate 6.
  • a hollow cone 9 is seated in aligned recesses in the back 7 and the base 8.
  • a side wall 10 of the offset can be seen in FIG. 1 in addition to FIG. 2, there also one of the two bevels 11 of the sheet metal plate 6.
  • both inclined side walls 10 and the bottom 8 of the crank appear. All of this is welded construction.
  • a gas spring 12 which is supported in the lower telescopic member of the column and which carries everything, projects into the hollow cone 9.
  • a bracket 14 of the backrest 4 is connected in an articulated manner to the sheet metal plate 6 by a torsion spring unit 13 of a known type.
  • Fig. 4 shows the welded connections on the one hand with the sheet metal plate 6 at 15 and on the other hand with the bracket 14 at 16.
  • 4 shows the torque support of the torsion spring unit 13 via a lever 17 against a projection 18 on the sheet metal plate 6; the end of the lever 17 cannot be seen, where a stud screw provided with a screw handle 19 passes through a thread attached to the lever 17 and its end rests on the projection 18.
  • the torsion bar 41 itself, as shown in FIGS. 1 and 2, is divided into four; it therefore has a comparatively soft characteristic. Its pretension, which the console 14 tries to pivot upwards and forwards, can be adjusted with the stud screw 20.
  • FIG. 5 further shows the torsion spring unit 13 in detail:
  • Two sleeves 51 are welded to the sheet metal plate 6 at 15, a sleeve 52 is welded to the bracket 14 at 16.
  • Two tubes 53 and 54 which are in turn aligned, extend through the aligned sleeves 51 and 52. Together with the sleeves 51 and 52, they form a joint as the hinge axis.
  • the outer ends of the tubes 53 and 54 are connected to each other by the torsion bar 21.
  • the tube 53 is supported on the projection 18 of the sheet metal plate 6 via the lever 17.
  • the power transmission takes place from the tube 53 via the torsion bar 21 and the tube 54 to the sleeve 52 welded to the tube 54 at 55 and thus into the bracket 14.
  • the force generated by the preload is held by a lockable hydraulic motion damper 24, which is articulated at 22 on the bracket 14 and at 23 on the support device 2.
  • the articulated connection with the support device 2 consists in particular of a two-legged bearing block 25 attached to the sheet metal plate 6 , in the two legs not shown stub axles of a head 26 of the piston rod 27 of the hydraulic damper 24 are articulated.
  • the connection to the console 14 and, moreover, the structure of the console 14 can be seen in more detail in FIG. 3.
  • the console 14 consists of a slightly angled base plate 28 and three projecting console plates 29 welded to it, which are connected to one another by a crossbar 30.
  • the crossbar 30 passes through an eyelet 31 of the movement damper 24.
  • Shaped plywood panels 32 and 33 are fastened on the sheet metal plate 6 and the base plate 28, which together with cushion pads 34 and 35 form the seat 3 and the backrest 4.
  • the torsion spring unit 13 protrudes with its cross-section relatively far above the sheet metal plate 6 and the console 14 upwards and is thus largely between the plywood plates 32 and 33.
  • the plywood plate 33 can thus be brought into different angular positions with respect to the plywood plate 32 without being between gives them a gap or nudge, so the seat and backrest act together as a shell.
  • a shaft 36 mounted in the two-leg bearing block 25 extends up to close to the side edge of the seat and is provided here with a hand lever 37.
  • a cam 38 sits on the shaft 36 between the two legs of the bearing block. It has a flat contact surface 39 and, following this, a contact surface 40 which is curved concentrically to the shaft 36 for a bent leaf spring 41 fastened to the sheet metal plate 6.
  • a pivoting of the hand lever from the drawn starting position out, in whatever direction, the leaf spring 41 continues to tension, ie the hand lever 37 and at the same time the cam 38 are held in the starting position by the leaf spring 41.
  • the height of the seat 3 including the backrest 4 can be adjusted using the following device: In alignment with the shaft 36, a shaft 44 provided there with a hand lever 43 extends from the other side edge of the seat to a two-legged bracket 45 in which it is mounted. A plate 46 is welded to the shaft 44 between the legs of the bracket 45, whereby two cams forming an elongated angle are created in a simple manner.
  • a rod 47 On the plate 46 is a rod 47 which is mounted with an angled portion 48 in the side walls 10 of the cranking of the plate 6 mentioned.
  • a sheet 49 is welded to the section 48 within the crank, which lies on a mandrel 50 protruding from the gas spring 12.
  • the plate 46 lifts the rod 47.
  • the plate 49 is thus pivoted downward and the mandrel 50 is pressed in by it.
  • the gas spring 12 is unlocked and the seat 3 together with the backrest 4 can be moved up and down.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)

Claims (8)

  1. Chaise, en particulier chaise de bureau, laquelle comporte un dispositif de support (2;5-11) pour un siège (3) et un dossier (4), qui est fixé de manière immobile sur une colonne (1) pourvue d'un pied, ledit dossier étant relié au siège (3), qui est disposé directement et de manière immobile sur le dispositif de support (2), via une articulation (13) disposée dans l'espace entre le siège (3) et le dossier (4) et qui est en outre soutenu, à partir du dispositif de support (2) par des éléments intermédiaires (24;14), dont le dernier est une poutre en porte-à-faux (14) disposée de manière immobile à l'extrémité inférieure du dossier (4), de telle manière que ledit dossier peut être pivoté vers l'arrière en allant contre la force d'une unité de ressort à torsion (13) et qu'il peut être bloqué en différentes positions, un amortisseur de mouvement (24) étant disposé entre le dispositif de support (2) et l'élément (14) se déplaçant lors du pivotement du dossier par rapport au dispositif de support (2), caractérisé en ce que l'unité de ressort à torsion (13) est disposée comme articulation et que l'amortisseur de mouvement (24) est utilisé comme seul autre élément intermédiaire en plus de la poutre en porte-à-faux et attaché en s'articulant (23;22), à une certaine distance de l'unité de ressort à torsion (13), au dispositif de support (2) ainsi qu'à la poutre en porte-à-faux (14) et en ce qu'il consiste en un amortisseur de mouvement (24) hydraulique avec verrouillage.
  2. Chaise selon la revendication 1, caractérisée en ce que l'unité de ressort par torsion (13) relie directement l'unité de support (2) à la poutre en porte-à-faux (14).
  3. Chaise selon la revendication 1 ou 2, caractérisée en ce que la tige du piston (26,27) de l'amortisseur hydraulique (24) est attachée en s'articulant au dispositif de support (2), de préférence à une patte d'appui (25) en deux éléments, et en ce qu'elle présente une broche (42) qui fait saillie hors de la tige du piston (26,27) et qui permet, lorsqu'on l'abaisse, de débloquer l'amortisseur de mouvement (24) et en ce qu'on a disposé sous le siège (3) un dispositif (36-41) comportant un levier à main (37) disposé près du bord du siège (3) pour abaisser la broche (42).
  4. Chaise selon la revendication 3, caractérisée en ce que le dispositif mentionné (36-41) est constitué par un arbre (36) pourvu d'un levier à main (37) sur lequel est placée une came (38) pour abaisser la broche (42) et qui est de préférence également logé dans la patte d'appui (25) à deux éléments.
  5. Chaise selon la revendication 4, caractérisée en ce qu'un ressort à lames (41) est disposé entre la came (38) et la broche (42) et en ce que la came (38) présente une surface d'appui (39) pour le ressort à lames (41) de telle manière que le ressort à lames (41) maintienne le levier à main (37) dans la position de départ par pression sur cette surface d'appui (39) grâce à laquelle la broche (42) est dans sa position extrême libre verrouillant l'amortisseur de mouvement (24).
  6. Chaise selon la revendication 5, caractérisée en ce que la came (38) présente une autre surface d'appui (40) courbée pour le ressort à lames (41) laquelle permet à la came (38) de tendre plus le ressort à lames (41) et d'abaisser la broche (42), via le ressort à lame (41), dans sa position abaissée, débloquant l'amortisseur de mouvement (24).
  7. Chaise selon l'une quelconque des revendications 1 à 6 pouvant être réglée en hauteur au moyen d'un amortisseur pneumatique (12) disposé dans sa colonne (1), comportant en son extrémité supérieure une broche (50) en saillie qui, lorsqu'on l'abaisse, débloque le ressort pneumatique (12) et qui présente, sous le siège (3), un dispositif (43-49) pour abaisser la broche (50) au moyen d'un levier à main (43) disposé à côté du bord du siège (3), caractérisée en ce que le dispositif (43-49) mentionné présente un arbre (44) pourvu d'un levier à main (43) et comportant deux cames (49) formant un angle plan qui permettent de déplacer un levier à deux bras (47-49) grâce auquel la broche (50) de l'amortisseur pneumatique (12) peut être abaissée.
  8. Chaise selon la revendication 7, caractérisée en ce que le levier (47-49) à deux bras est constitué par une tige (47) pliée qui est fixée avec un côté de l'angle (48), de préférence dans un coude du dispositif de support (2), et dont l'autre côté de l'angle (49) forme un bras de levier, ainsi que par une tôle (49) qui forme l'autre bras de levier (49), qui est fixée à la première branche de l'angle (48) et qui recouvre la broche (50) du ressort pneumatique (12).
EP89118551A 1988-10-14 1989-10-06 Chaise, en particulier chaise de bureau Expired - Lifetime EP0363833B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3835003A DE3835003A1 (de) 1988-10-14 1988-10-14 Sessel oder stuhl, insbesondere buerosessel oder -stuhl
DE3835003 1988-10-14

Publications (2)

Publication Number Publication Date
EP0363833A1 EP0363833A1 (fr) 1990-04-18
EP0363833B1 true EP0363833B1 (fr) 1993-05-19

Family

ID=6365108

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89118551A Expired - Lifetime EP0363833B1 (fr) 1988-10-14 1989-10-06 Chaise, en particulier chaise de bureau

Country Status (3)

Country Link
US (1) US5069496A (fr)
EP (1) EP0363833B1 (fr)
DE (2) DE3835003A1 (fr)

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US9004597B2 (en) 2012-09-20 2015-04-14 Steelcase Inc. Chair back mechanism and control assembly

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US5389062A (en) * 1992-10-05 1995-02-14 Mitchum, Jr.; John T. Intercourse-facilitating therapeutic furniture
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DE4326609C2 (de) * 1993-08-07 1996-03-28 Taipei Design Center Duesseldo Bürodrehstuhl
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US5577804A (en) * 1995-06-30 1996-11-26 Global Upholstery Company Seat height adjustment mechanism for a chair
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US6386528B1 (en) 1999-07-08 2002-05-14 Lord Corporation Damper including resilient friction member and seat assembly using same
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US7293833B2 (en) * 2005-02-02 2007-11-13 Itoki Corporation Chair and support mechanism unit thereof
US20070102979A1 (en) * 2005-10-25 2007-05-10 GLOBAL TOTAL OFFICE an Ontario limited partnership having GLOBAL UPHOLSTERY CO. Adjustment mechanism for a chair and method for replacing a telescoping cylinder in a reconfigurable chair
US7708346B2 (en) * 2006-10-13 2010-05-04 L&P Property Management Company Reclining back mechanism for a seating unit
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US8167373B2 (en) * 2008-06-06 2012-05-01 Knoll, Inc. Height adjustment mechanism for a chair
CA2950118C (fr) * 2008-12-12 2019-04-23 Formway Furniture Limited Chaise, support et composants
JP2010227324A (ja) * 2009-03-27 2010-10-14 Oki Electric Ind Co Ltd 椅子
US20120139318A1 (en) * 2010-12-07 2012-06-07 Chuen-Jong Tseng Chair
US11304528B2 (en) 2012-09-20 2022-04-19 Steelcase Inc. Chair assembly with upholstery covering
US9504327B2 (en) * 2015-02-09 2016-11-29 Harmony Lifestyle, LLC Reclinable chair having a locking gas spring reclining back rest
IT201800002761U1 (it) * 2018-06-14 2019-12-14 Poltroncina per ufficio con schienale e sedile mobili in sincronia.
CN116784619A (zh) * 2023-08-04 2023-09-22 中山市东立家具配件有限公司 一种后背深浅可调的座椅

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Cited By (13)

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Publication number Priority date Publication date Assignee Title
US9004597B2 (en) 2012-09-20 2015-04-14 Steelcase Inc. Chair back mechanism and control assembly
US9010859B2 (en) 2012-09-20 2015-04-21 Steelcase Inc. Chair assembly
US9022476B2 (en) 2012-09-20 2015-05-05 Steelcase Inc. Control assembly for chair
US9027999B2 (en) 2012-09-20 2015-05-12 Steelcase Inc. Control assembly for chair
US9027997B2 (en) 2012-09-20 2015-05-12 Steelcasel Inc. Chair assembly
US9027998B2 (en) 2012-09-20 2015-05-12 Steelcase Inc. Chair assembly
US9049935B2 (en) 2012-09-20 2015-06-09 Steelcase Inc. Control assembly for chair
USD742677S1 (en) 2012-09-20 2015-11-10 Steelcase Inc. Chair
USD742676S1 (en) 2012-09-20 2015-11-10 Steelcase Inc. Chair
US9345328B2 (en) 2012-09-20 2016-05-24 Steelcase Inc. Chair assembly with upholstery covering
US9451826B2 (en) 2012-09-20 2016-09-27 Steelcase Inc. Chair assembly
US9462888B2 (en) 2012-09-20 2016-10-11 Steelcase Inc. Control assembly for chair
US9492013B2 (en) 2012-09-20 2016-11-15 Steelcase Inc. Chair back mechanism and control assembly

Also Published As

Publication number Publication date
US5069496A (en) 1991-12-03
DE3835003A1 (de) 1990-04-19
EP0363833A1 (fr) 1990-04-18
DE58904416D1 (de) 1993-06-24

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