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EP0271600B1 - Verstellbarer Stuhl - Google Patents

Verstellbarer Stuhl Download PDF

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Publication number
EP0271600B1
EP0271600B1 EP86117738A EP86117738A EP0271600B1 EP 0271600 B1 EP0271600 B1 EP 0271600B1 EP 86117738 A EP86117738 A EP 86117738A EP 86117738 A EP86117738 A EP 86117738A EP 0271600 B1 EP0271600 B1 EP 0271600B1
Authority
EP
European Patent Office
Prior art keywords
pin
chair
base
axis
parallel
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
EP86117738A
Other languages
English (en)
French (fr)
Other versions
EP0271600A1 (de
Inventor
Gino Gamberini
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.)
COM Cooperativa Operai Mobilieri SCARL
Original Assignee
COM Cooperativa Operai Mobilieri SCARL
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 COM Cooperativa Operai Mobilieri SCARL filed Critical COM Cooperativa Operai Mobilieri SCARL
Priority to DE8686117738T priority Critical patent/DE3682682D1/de
Priority to EP86117738A priority patent/EP0271600B1/de
Publication of EP0271600A1 publication Critical patent/EP0271600A1/de
Application granted granted Critical
Publication of EP0271600B1 publication Critical patent/EP0271600B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
    • A47C1/03274Reclining 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 of torsion type
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03266Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with adjustable elasticity

Definitions

  • the present invention relates to an adjustable chair.
  • the present invention relates to an adjustable chair of the type described in FR-A-2 509 160, and comprising a base; a body supported by such base; and a control mechanism for controlling the position of the above body in relation to the base; and in which the body includes a frame, which comprises a first part defining a seat, a second part defining a seat back, and a hinge for connecting the above first and second parts together so as to allow relative rotation thereof about an axis; the aforementioned mechanism having a first member, a pin extending parallel with the above axis of rotation and connected to the base to form a pivot for the above first member to rotate thereabout, and a second member having a rear portion connected to the second part of the frame.
  • the aforementioned second member has a front end hinged to the base, and the aforementioned first member is a resilient member extending between the base and an intermediate point of the second member to resiliently control the rotation thereof in relation to the base.
  • the above known chairs are not real adjustable chairs, in the sense that only a part thereof is deformable in dependance on the distribution of forces applied thereto, i.e. on the position of the user; whereas the theory is perfectly known that in a real adjustable chair, all the component parts should be deformable to suit, in any case, the position of a user.
  • an adjustable chair not only both the angles between seat and seat back and between the seat back and the supporting base should change to suit the user's position, but also the angle between the seat and the base should change, and the variations of the angles of the seat and the seat back in relation to the base should be dependent on one another according to a law in turn depending on the weight of the user.
  • the seat and the seat back are substantially rigid with each other, and are mounted on a base to pivot in relation thereto about a single pivot, so that the angles between the seat and the base, and between the seat back and the base change, but not the angle between the seat and the seat back. Also the chairs of this known type are not, therefore, real adjustable chairs.
  • an adjustable chair comprising a base; a body supported by said base; and a control mechanism for controlling the position of said body in relation to said base; said body including a frame, which comprises a first part defining a seat, a second part defining a seat back, and hinge means for connecting said first and second parts together so as to allow relative rotation thereof about an axis; said mechanism having a first member, a first pin extending parallel with said axis and connected to said base to form a pivot for said first member to rotate thereabout, and a second member having a rear portion connected to said second part, characterized in that said first member has a front end rigidly connected to said first part; a second pin parallel to said first pin being carried by a central portion of said first member, and said second member having a front end coupled to said second pin for rotation thereabout in relation to said first member, and against the action of spring means.
  • the seat is hinged to the seat back, and is connected to the first member of the mechanism for rotating substantially therewith in relation to the base and about a first axis, whereas the seat back is connected to the second member of the mechanism and hinged to the first member of the mechanism to rotate in relation to the above first member about a second axis.
  • the seat and the seat back on one hand, and the first and the second member of the mechanism on the other hand substantially define an articulated parallelogram allowing movement of the seat and the seat back in relation to each other and to the base as theoretically required in an adjustable chair.
  • an adjustable chair is generally indicated with the reference numeral 1 and comprises a body 2 having a metal frame 3 (Figure 2) completely embedded in a layer of polyurethane which will be described better hereinbelow.
  • the body 2 rests on a base 4 of the type having five radial arms 5 to the free ends of which are fixed respective wheels 6.
  • the body 2 is defined by a seat back 7 and a seat 8 which can assume a respective inclination according to the position assumed by the user.
  • the chair 1 can be adjusted in dependence on the fundamental anthropometric parameters of the user such as height and weight.
  • the chair 1 is able automatically to favour the position assumed by the user in that it includes mechanisms which allow the inclination of the seat back 7 and of the seat 8 and which are actuated by the pressure of the body of the user.
  • the part of the frame 3 relating to the seat 8 is indicated 9 and includes a rod bent into a U in such a way as to define tow lateral bars 11 and a front bar 12.
  • the free ends of the bars 11 are connected together by a rear bar 13 parallel to the bar 12.
  • the free ends of the bars 11 are pivoted to a respective pin 15.
  • the part of the frame 3 associated with the seat back 7 is indicated 10 and comprises two rods folded to form a parallelogram. These rods define a respective outer lateral bar 16, a respective inner lateral bar 18 and two bars 22 and 23 which are, respectively, upper and lower bars, joining the bars 16 and 18, which are parallel to one another.
  • the bar 18 has a length less than that of the bar 16 and the bars 22 and 23 are oblique with respect to the bars 16 and 18.
  • the free ends of the bars 16 are pivoted to the pins 15.
  • the bars 18 are connected together by a bar 21 whilst the bars 22 are connected together by a spring 24.
  • a mechanism mounted on the frame 3 is generally indicated 31 and is able to allow the inclination of the seat back 7 and the seat 8.
  • the mechanism 31 comprises a plate 32 having a front end fixed to a bar 33 rigidly connected to the bar 12.
  • a plate 32 has, starting from the bar 33, a first section 34 which extends downwardly, a central second section 35 which also extends downwardly but with a different inclination from that of the section 34, and a third section 36 lying in a plane substantially parallel to the support plane of the chair 1.
  • a central through hole 37 housing an upper end 38 of the base 4 within which there is mounted, in a manner not illustrated, a gas cylinder by actuating of which one can regulate the longitudinal extension of the base 4 and therefore the height of the body 2 above the support plane.
  • the end 38 of the base 4 engages a sleeve 41 having above and below the plate 32 respective sections 42 and 43.
  • the section 43 supports, close to the junction between the sections 35 and 36 of the plate 32, a small bar 44 the axis of which is parallel to the support plane and to the bar 12. From the section 36 of the plate 32 two pierced projections 49 extend downwardly, by means of which the plate 32 is pivotally connected to the bar 44.
  • the plate 32 can therefore rotate about the axis of the bar 44.
  • the section 43 has an outer diameter greater than that of the section 42.
  • a through hole 45 coaxial with the through hole 46 formed in the section 36 of the plate 32 close to the free end of this.
  • the holes 45 and 46 house a screw 47 and stem of which extends upwardly and out from the hole 46 and lodges in a sleeve 48 formed of resilient material.
  • the mechanism 31 further includes two parallel bars 55 having a first end fixed to a U-shape element 56 the concavity of which faces upwardly. From the bars 18 extend respectively pins 57 which lodge in corresponding ends of the element 56. The bars 55 are thus hinged to the pins 57.
  • the element 56 is engaged by a strip 58 of plastics material fixed thereto by means of screws not illustrated. The strip 58 prevents the escape of the pins 57 from the element 56.
  • the bars 55 have a first section 61 positioned between the bars 18, a second section 62 which extends from the first beneath the part 9, and a third section 63 which is parallel to and positioned above the section 36 of the plate 32.
  • a corresponding spring 54 At the free ends of the sections 63 there is fixed one end of a corresponding spring 54 a second end of which is folded and housed in a sleeve 65 also housing a second end of the spring 54.
  • the sleeve 65 has an axis parallel to that of the pin 53 and is positioned between the projections 52 extending from the section 35 of the plate 32.
  • the sleeve 65 has a central diametral threaded hole 66 in which is screwed the shank of a screw 67 the head of which rests beneath the section 35 and which extends upwardly through a through hole 71 formed in the section 35.
  • a through hole 71 formed in the section 35.
  • the springs 54 are compressed between a plate 73 and a corresponding projections 52.
  • the part 9 can be provided with a network of elastic belts 75 illustrated in broken outline ( Figure 3).
  • the parts 9 and 10 are embedded in respective layers of polyurethane 80 and 81 in such a way as to define together therewith the seat back 7 and the seat 8.
  • the layer of polyurethane 80 of the seat back 7 has a U-shape cut 82 corresponding to the element 56 and to the bars 55. These latter, in correspondence with their first section 61, are embedded in a layer of polyurethane 83 having a plurality of corrugations parallel to the support planes.
  • the layer 81 has a central portion 84 having a plurality of corrugations parallel to those of the layer 83.
  • the portion 84 extends from the bar 13 into the bar 12 and has for a substantial section the same width as the layer 83 and subsequently an increasing width. It is to be noted moreover that the sections 62 and 63 of the bars 55 and the space defined by the plate and by the projections 52 are also embedded in a layer of polyurethane 86 which also covers the lower face of the plate 32 ( Figure 2).
  • the layer 86 is formed as a continuation of the layer 83. Along the whole of the junction between the layers 80 and 81 there is formed an open slot 87.
  • the layers 80 and 81 finally have a lateral edge 88 of greater thickness.
  • the inclination of the seat back 7 and of the seat 8 is a function of the distribution of the weight of the body of the user.
  • a rotation of the plate 32 in a clockwise sense takes place about the axis of the bar 44.
  • This rotation causes rotation in a clockwise sense also of the whole of the body 2.
  • the free end of the plate 32 in correspondence with the hole 46 will also turn in a clockwise sense compressing the sleeve 48.
  • the whole body 2 returns to the original position by the action of the sleeve 48 which presses the free end of the plate 32 downwardly making this latter turn in a clockwise sense.
  • the springs 54 With the back engaging on the seat back 7 rotation of the bar 55 about the axis of the pin 53 takes place by deformation of the springs 54.
  • the seat back 7, and in particular the part 10 of the frame 3 turns about the axes of the pins 57 and draws the pins 15 downwardly with a movement of pantograph type. Consequently this increases the relative angle between the seat 8 and the seat back 7.
  • the springs 54 can be calibrated, that is to say more or less preloaded for the purpose of adjusting the rotation of the bars 55 in relation to the weight of the user.
  • the chair 1 can be provided with a covering 91 ( Figure 5).
  • the chair 1 can be personalised by adjusting the mechanisms 31 (screws 67) in dependence on the weight of the user.
  • the mechanism 31 which permits such inclination is of simple construction in that it is formed with a small number of components.
  • the frame 3 and the mechanism 31 are embedded in polyurethane which forms the aesthetic outline of the chair 1, which for the considerations just explained is of reduced production costs.
  • the parts 9 and 10 can have lateral projections in such a way as to be able to widen the body 2 at will starting from a base model of the frame 3.
  • the polyurethane there can be used other resilient and/or deformable materials such as a different plastics material, rubber or a sponge layer.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Claims (9)

  1. Verstellbarer Stuhl mit einem Untergestell (4), mit einem von dem Untergestell (4) getragenen Korpus (2) und mit einem Steuermechanismus zur Einstellung der Position des Korpus (2) in Bezug zum Untergestell (4), wobei der Korpus (2) einen Rahmen (3), der aus einem einen Sitz (8) definierenden ersten Teil (9) und einem eine Rückenlehne (7) definierenden zweiten Teil (10) besteht, und Gelenkmittel (15) zur Verbindung des ersten und zweiten Teiles miteinander umfaßt, um deren Relativdrehung um eine Achse zu gestatten, wobei der Mechanismus (31) ein erstes Glied (32), einen ersten Bolzen (44), der sich parallel zu der Achse (15) erstreckt und mit dem Untergestell (4) verbunden ist, um einen Drehzapfen für die Drehung des ersten Gliedes (32) auszubilden, und ein zweites Glied (55, 56) besitzt, welches einen hinteren Abschnitt (61) aufweist, der mit dem zweiten Teil (10) verbunden ist, dadurch gekennzeichnet, daß das erste Glied (32) ein fest mit dem ersten Teil (9) verbundenes vorderes Ende aufweist, daß ein zweiter, zum ersten Bolzen (44) paralleler Bolzen (53) von einem zentralen Abschnitt (35) des ersten Gliedes (32) getragen ist, und daß das zweite Glied (55, 56) ein mit dem zweiten Bolzen (53) verbundenes vorderes Ende zur Drehung um diesen bezüglich des ersten Gliedes (32) und gegen Wirkung einer Federeinrichtung (54) aufweist
  2. Stuhl nach Anspruch 1, dadurch gekennzeichnet, daß das erste Glied (32) eine Platte (32) beinhaltet, die ein Paar von ersten seitlichen Vorsprüngen (52) aufweist, an denen der zweite Bolzen (53) montiert ist, daß die Feder (54) um den zweiten Bolzen (53) herumgewunden ist und das zweite Glied (55) und den zentralen Abschnitt (35) des ersten Gliedes (32) miteinander verbindet.
  3. Stuhl nach Anspruch 2, dadurch gekennzeichnet, daß das zweite Glied (55) Stangen (54) umfaßt, die jeweils freie Enden aufweisen, daß die Feder (54) mit diesen freien Enden verbunden ist, und daß längenverstellbare Verbindungsmittel (67) vorgesehen sind zur Verbindung der Feder (54) mit dem zentralen Abschnitt (35) des ersten Gliedes (32).
  4. Stuhl nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der erste Bolzen (44) mit dem ersten Glied (32) im wesentlichen im zentralen Abschnitt (35) desselben gekuppelt ist, daß das erste Glied (32) einen hinteren Abschnitt (36) beinhaltet, der sich hinter den ersten Bolzen (44) erstreckt, und daß federelastische Mittel (45, 48) vorgesehen sind, um den hinteren Abschnitt (36) mit dem Untergestell (4) zu verbinden, um die Drehung des ersten Gliedes (32) um den ersten Bolzen (44) in Bezug zum Untergestell (4) zu steuern.
  5. Stuhl nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß ein zu der Achse paralleler Zwischenbolzen (57) an dem zweiten Teil (10) des Rahmens (3) vorgesehen ist, der an dem Zwischenbolzen (57) angelenkt ist.
  6. Stuhl nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß ein Paar von ersten Schichten (81, 80) aus Polyurethan vorgesehen ist, in die das erste und das zweite Teil (9, 10) eingebettet sind.
  7. Stuhl nach Anspruch 6, dadurch gekennzeichnet, daß eine zweite Schicht (83, 86) aus Polyurethan vorgesehen ist, in die der Mechanismus (31) eingebettet ist.
  8. Stuhl nach Anspruch 7, dadurch gekennzeichnet, daß die Schicht (80) der ersten Schichten (81, 80), welche den zweiten Teil (10) einbettet, mit einer Öffnung (82) versehen ist, längs der sich der hintere Abschnitt (61) des zweiten Gliedes (55) zusammen mit einem entsprechenden hinteren Abschnitt (83) der zweiten Schicht (83, 80) erstreckt, und daß eine Anzahl von parallel zu der Achse (15) verlaufenden Wellungen auf einer Vorderfläche des hinteren Schichtabschnitts (83) angeordnet ist.
  9. Stuhl nach Anspruch 8, dadurch gekennzeichnet, daß die erste Schicht (81), in die der erste Teil (9) eingebettet ist, einen mittleren Abschnitt (84) aufweist, der mit dem hinteren Schichtabschnitt (83) ausgerichtet ist, und auf dem eine Anzahl weiterer zur Achse (15) paralleler Wellungen ausgebildet ist.
EP86117738A 1986-12-19 1986-12-19 Verstellbarer Stuhl Expired - Lifetime EP0271600B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8686117738T DE3682682D1 (de) 1986-12-19 1986-12-19 Verstellbarer stuhl.
EP86117738A EP0271600B1 (de) 1986-12-19 1986-12-19 Verstellbarer Stuhl

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86117738A EP0271600B1 (de) 1986-12-19 1986-12-19 Verstellbarer Stuhl

Publications (2)

Publication Number Publication Date
EP0271600A1 EP0271600A1 (de) 1988-06-22
EP0271600B1 true EP0271600B1 (de) 1991-11-27

Family

ID=8195657

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86117738A Expired - Lifetime EP0271600B1 (de) 1986-12-19 1986-12-19 Verstellbarer Stuhl

Country Status (2)

Country Link
EP (1) EP0271600B1 (de)
DE (1) DE3682682D1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1241914B (it) * 1990-12-14 1994-02-01 M Piu Di Marani Giorgio E C S Sedia o poltrona di tipo operativo, particolarmente per l'ufficio, conschienale ad assetto variabile e bilanciato dal peso corporeo dell' utente che grava sul sedile.
US20030132653A1 (en) * 2001-10-18 2003-07-17 Doug Thole Tension control mechanism for a chair
US10021985B2 (en) * 2016-04-28 2018-07-17 James E. Grove Adjustable back support assembly for the back of a chair

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA869337A (en) * 1969-09-23 1971-04-27 Doerner Products Co. Limited Chair control with support for the torsion spring
GB1329238A (en) * 1969-10-17 1973-09-05 Beishon A R Chair action unit
DE2733322C3 (de) * 1977-07-23 1980-08-07 Protoned B.V., Amsterdam Arbeitsstuhl
FR2509160A1 (fr) * 1981-07-10 1983-01-14 Strasbourg Sa Forges Mecanisme basculant pour siege

Also Published As

Publication number Publication date
EP0271600A1 (de) 1988-06-22
DE3682682D1 (de) 1992-01-09

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