EP1161904A1 - Chaise à dossier et siège synchronisés - Google Patents

Chaise à dossier et siège synchronisés Download PDF

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Publication number
EP1161904A1
EP1161904A1 EP01113143A EP01113143A EP1161904A1 EP 1161904 A1 EP1161904 A1 EP 1161904A1 EP 01113143 A EP01113143 A EP 01113143A EP 01113143 A EP01113143 A EP 01113143A EP 1161904 A1 EP1161904 A1 EP 1161904A1
Authority
EP
European Patent Office
Prior art keywords
backrest
seat
supporting structure
blocking
aforesaid
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.)
Withdrawn
Application number
EP01113143A
Other languages
German (de)
English (en)
Inventor
Giancarlo Piretti
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.)
Pro Cord SpA
Original Assignee
Pro Cord SpA
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 Pro Cord SpA filed Critical Pro Cord SpA
Publication of EP1161904A1 publication Critical patent/EP1161904A1/fr
Withdrawn legal-status Critical Current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
    • A47C1/031—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
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • A47C1/03238—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism
    • 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
    • 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
    • A47C1/03277—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with bar or leaf springs
    • A47C1/03279—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with bar or leaf springs of torsion type

Definitions

  • the present invention relates to a chair with seat and backrest that oscillate in a synchronized way. More precisely, the invention relates to a chair of the type comprising:
  • the purpose of the present invention is to provide a chair of the type specified above that enables the aforesaid drawbacks to be overcome.
  • the above purpose is achieved by a chair having the characteristics that form the subject of the main claim.
  • the number 10 designates a chair comprising a central support 12, which is height-adjustable (of a type of itself known) and carries at its top a base structure 14.
  • the base structure 14 carries a seat 16, a backrest 18, and a pair of armrests 20.
  • the base structure 14 is generically box-shaped, open at the top, and fixed to the top end of the central support 12.
  • a transverse tubular element 22 is fixed to the base structure 12 and carries, inside it, a torsion bar 24 consisting, for example of a pack of metal laminas.
  • the backrest 18 comprises a supporting structure including two shaped tubular elements 26, the bottom ends of which are articulated to the tubular element 22 about a first transverse axis A.
  • the tubular elements 26 constituting the backrest-supporting structure are fixed to the opposite ends of the torsion bar 24.
  • Each armrest 20 is carried by an upright 30 which is height-adjustable and which, at its bottom end, is fixed to the corresponding end of a tubular element 26 of the backrest-supporting structure. In this way, as illustrated in Figures 1A and 1B, the armrests 20 can oscillate in an integral way with the backrest 18 about the transverse axis A.
  • a central area of the torsion bar 24 is fixed to an adjusting lever 32.
  • This fixing may be obtained, for example, by shape-fitting between the rectangular section of the torsion bar 24 and a hole having a corresponding shape made in the adjusting lever 32.
  • one end of the adjusting lever 32 is connected to the base structure 14 by means of an adjusting device 34 that enables modification of the pre-loading of the torsion bar 24.
  • the adjusting device 34 comprises a screw 36 fixed to an adjusting knob 38.
  • the screw 36 engages an internal thread 40 which co-operates with the top part of a pressure element 42.
  • the said pressure element 42 rests on one end of the adjusting lever 32 and is shaped in such a way as to provide shape-fitting with the lever 32 so as to prevent rotation of the pressure element 42 about the axis of the screw 36. It will be realized that rotation of the adjusting knob 38 enables modification of the angular position of the adjusting lever 32 with respect to the base structure 14. As illustrated in Figures 6 and 7, the variation in position of the lever 32 in turn modifies the elastic pre-loading of the torsion bar 24, i.e., the force that must be applied to the backrest to overcome the force of contrast of the spring and cause an oscillation of the backrest backwards about the transverse axis A.
  • the chair 10 comprises a seat-supporting structure 44, which is generally box-shaped and open at the bottom, and on which the seat 16 with the corresponding padding is fixed.
  • the two shaped tubular elements 26 constituting the backrest-supporting structure are connected together by a transverse rod 46 parallel to the articulation axis A.
  • the seat-supporting structure 44 is articulated in its rear part about the rod 46.
  • the said articulation is obtained, for example, by means of a pair of bushings 48 which are carried by opposite side walls of the seat-supporting structure 44 and engage the rod 46 in a rotating way.
  • the seat-supporting structure 44 is thus articulated to the backrest-supporting structure 26 about an axis B ( Figure 3) parallel to the articulation axis A between the backrest-supporting structure 26 and the base structure 14.
  • the front part of the seat-supporting structure 44 is articulated to the base structure 14 by means of a pair of connecting rods 50, each of which has a bottom end articulated to the base structure 14 about an axis 52 and a top end articulated to the seat-supporting structure 44 about an axis 54.
  • the articulation axes 52 and 54 are parallel to the articulation axes A and B.
  • the seat-supporting structure 44 is connected to the base structure 14 by means of an articulated-quadrilateral mechanism, the said quadrilateral being formed by the lines joining the articulation axes A and B and, respectively, 53 and 54.
  • the seat 10 is moreover provided with a device for blocking the seat and backrest in a plurality of different positions.
  • the blocking device comprises a rocker arm 56 having a central part articulated on the transverse tubular element 22 about the axis A, a first end articulated to the rod 46 about the axis B, and a second end provided with a plurality of holes 58, 60 which can be engaged by respective blocking elements.
  • the rocker arm 56 is preferably provided with a pair of elastic inserts 62, 64, which, as illustrated in Figures 4 and 5, are designed to bear upon the base structure 14 to define a position of maximum inclination forwards ( Figure 4) and a position of maximum inclination backwards (Figure 5).
  • the chair 10 comprises a control device 66 that can be operated manually to block or release synchronized oscillation of the seat and backrest.
  • the control device 66 comprises a support 68 fixed to the base structure 14 of the chair.
  • a control shaft 70 is carried by the support 68 in an oscillating way about its own axis and can oscillate between a blocking position and a releasing position.
  • the shaft 70 carries, at one of its ends, a control lever 71 that can be operated manually.
  • a transverse pin 72 is fixed to the shaft 70 and has a head 74 which projects out from the support 68.
  • the pin 72 co-operates with an arrest mechanism 76 designed to define two retention positions corresponding to the blocking position and to the releasing'position.
  • the arrest mechanism 76 comprises a first arrest element 78 and a second arrest element 80 provided with respective seats having a semicircular shape that are set facing one another and are designed to grip, between them, a portion of the pin 72 to perform the action of retention.
  • the two retention elements 78, 80 are slidable one with respect to the other along the axis of the shaft 70 and are elastically pushed against one another by an elastic element constituted, for example, by a helical spring in compression 84. It will be realized that by applying a torque higher than a pre-set value on the axis of the shaft 70 by means of the control lever 71 it is possible to cause the pin 72 to move by snap action from one to the other of the two operating positions illustrated in Figures 9 and 10.
  • the control device 66 comprises a pair of blocking pins 86, 88 which are slidable within respective seats 90 integral with the base structure 14. As may be seen in Figures 9 and 10, the blocking pins 86, 88 are slidable, in a direction orthogonal to the rocker arm 56, between the releasing position illustrated in Figure 9 and the blocking position illustrated in Figure 10.
  • the control device 66 comprises a pair of pin springs 92, each of which has a first arm 94 that engages the head 74 of the pin 72 and a second arm 96 which engages a radial appendage 98 of a respective blocking pin 86, 88.
  • Each pin spring 92 has a central portion which is carried, so that it is free to turn, by a pin 100 integral with the support 68 of the control device 66.
  • the movement of the pin 72 from the releasing position to the blocking position controls, by means of the springs 92, sliding of the blocking pins 86, 88 from a retracted position of release ( Figure 9) to an extracted position of blocking ( Figure 10).
  • the user sets the desired position of the seat and backrest and moves the lever 71 towards the blocking position.
  • the oscillation of the lever 71 shifts the pin 72 towards the blocking position illustrated in Figure 10.
  • the blocking pins 86, 88 are pushed towards the rocker arm 56 by the elastic force of the springs 92.
  • the pin is pushed into the hole, so that it engages the hole, by the respective spring 92.
  • the rocker arm 56 In the blocking position, as illustrated in Figure 10, the rocker arm 56 is integral with the base structure 14, given that the engagement of one of the blocking pins 86 or 88 in a corresponding hole 58 or 60 prevents rotation of the rocker arm 56 about the axis A. It will be appreciated that the blocking of the rocker arm 56 prevents the movement of oscillation of the seat and backrest and that each hole 58, 60 defines a different blocking position of the seat and backrest.
  • the chair is also provided with a second lever 102, which may be operated manually to control, in a way in itself known, a gas-operated spring which controls height-adjustment of the chair.
EP01113143A 2000-06-06 2001-05-30 Chaise à dossier et siège synchronisés Withdrawn EP1161904A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO000538 2000-06-06
IT2000TO000538A IT1320403B1 (it) 2000-06-06 2000-06-06 Sedia con sedile e schienale oscillanti in modo sincronizzato.

Publications (1)

Publication Number Publication Date
EP1161904A1 true EP1161904A1 (fr) 2001-12-12

Family

ID=11457791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01113143A Withdrawn EP1161904A1 (fr) 2000-06-06 2001-05-30 Chaise à dossier et siège synchronisés

Country Status (5)

Country Link
US (1) US20010050500A1 (fr)
EP (1) EP1161904A1 (fr)
JP (1) JP2002010852A (fr)
CN (1) CN1327781A (fr)
IT (1) IT1320403B1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1320420B1 (it) 2000-06-09 2003-11-26 Pro Cord Srl Sedia con sedile oscillante.
JP4818506B2 (ja) * 2000-11-06 2011-11-16 株式会社岡村製作所 椅子における背凭れの傾動装置
EP1527714B1 (fr) * 2002-07-23 2008-11-26 Okamura corporation Chaise
GB0609315D0 (en) * 2006-05-11 2006-06-21 Technicon Internat Man Service Improved seat
JP2008049079A (ja) * 2006-08-28 2008-03-06 Kokuyo Co Ltd ロッキング機構、及び椅子
US8973995B2 (en) * 2009-02-25 2015-03-10 Donati S.P.A. Device for synchronizing the tilt of a chair back and seat
BR112012021407B1 (pt) * 2010-02-26 2020-06-09 Donati Spa dispositivo para sincronizar a inclinação do encosto e do assento de uma cadeira
JP5133382B2 (ja) * 2010-08-31 2013-01-30 株式会社岡村製作所 椅子
JP5443301B2 (ja) * 2010-08-31 2014-03-19 株式会社岡村製作所 椅子
ITUB20154688A1 (it) * 2015-10-15 2017-04-15 Co Fe Mo Ind S R L Meccanismo di oscillazione per sedie regolabile
IT201600071468A1 (it) 2016-07-08 2018-01-08 Co Fe Mo Ind S R L Meccanismo di oscillazione per sedie
TWI685317B (zh) * 2016-10-07 2020-02-21 堡勝企業股份有限公司 椅背緩衝調整裝置及具有椅背緩衝調整裝置的椅子
DE102017208151A1 (de) * 2016-10-24 2018-04-26 Stabilus Gmbh Stellvorrichtung zur Betätigung einer Bremse und mobile Einheit, insbesondere Stuhl
CN107041645A (zh) * 2017-04-25 2017-08-15 安徽庆睿实业有限责任公司 智能保健办公椅
WO2020172243A1 (fr) 2019-02-21 2020-08-27 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
US20220192378A1 (en) 2020-12-22 2022-06-23 Barbara Gervais Furniture foot with integrated slide mechanism

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999035939A1 (fr) * 1998-01-16 1999-07-22 Miotto International Company Mecanisme de commande d'une chaise a plusieurs positions a reglage synchronise du siege et du dossier
WO2000022959A1 (fr) * 1998-10-20 2000-04-27 Protoned B.V. Systeme mecanique pour fauteuil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999035939A1 (fr) * 1998-01-16 1999-07-22 Miotto International Company Mecanisme de commande d'une chaise a plusieurs positions a reglage synchronise du siege et du dossier
WO2000022959A1 (fr) * 1998-10-20 2000-04-27 Protoned B.V. Systeme mecanique pour fauteuil

Also Published As

Publication number Publication date
IT1320403B1 (it) 2003-11-26
ITTO20000538A1 (it) 2001-12-06
US20010050500A1 (en) 2001-12-13
ITTO20000538A0 (it) 2000-06-06
CN1327781A (zh) 2001-12-26
JP2002010852A (ja) 2002-01-15

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