EP1175854A1 - Dispositif de réglage pour chaise inclinable de bureau ou similaire - Google Patents

Dispositif de réglage pour chaise inclinable de bureau ou similaire Download PDF

Info

Publication number
EP1175854A1
EP1175854A1 EP00830528A EP00830528A EP1175854A1 EP 1175854 A1 EP1175854 A1 EP 1175854A1 EP 00830528 A EP00830528 A EP 00830528A EP 00830528 A EP00830528 A EP 00830528A EP 1175854 A1 EP1175854 A1 EP 1175854A1
Authority
EP
European Patent Office
Prior art keywords
support element
elastic
slide
oscillation axis
primary body
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Withdrawn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
EP00830528A
Other languages
German (de)
English (en)
Inventor
Sergio Moreschi
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.)
Cofemo SpA
Original Assignee
Cofemo 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 Cofemo SpA filed Critical Cofemo SpA
Priority to EP00830528A priority Critical patent/EP1175854A1/fr
Publication of EP1175854A1 publication Critical patent/EP1175854A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • A47C1/03261—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
    • 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
    • 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

Definitions

  • the present invention relates to an adjustment system for office reclining chairs and the like.
  • office chairs are generally adjustable both in height and in the inclination of the back, and sometimes even in the inclination of the seat.
  • the seat can be wholly integral with the back, so that both can incline together of the same angle, or the seat can be only partially connected to the back so as to incline less than the latter.
  • Chairs of the above-mentioned kind normally consist of a primary body, for instance box-shaped, having a lower seat adapted to house and engage an upper end of an upright which defines a vertical stand for an office chair.
  • said upright consists of a fluid-dynamic cylinder carrying out a pneumatic spring used to change the seat height.
  • a support element of the back so as to enable the adjustment of the inclination of the latter.
  • elastic means are placed between the support element of the back and the primary body, said means being able to exert onto said support element of the back a resisting moment with respect to said oscillation axis, said moment tending to turn the back forward in contrast with the moment tending to push the latter backward, due to the pressing force developed by the sitter.
  • said elastic means comprise at least one elastic element with linear strain, such as for instance a cylindrical helical compression spring, adapted to exert, directly or indirectly, onto the support element of the back an elastic force at a distance from said oscillation axis, so as to define said resisting moment.
  • elastic element with linear strain such as for instance a cylindrical helical compression spring
  • the technical aim of the present invention is to provide for an adjustment system for office reclining chairs and the like which can obviate said disadvantages.
  • an important purpose of the present invention is to provide for an adjustment system for chairs which enables, given the same rotation angle of the control element for instance a handle, to modify to a greater extent the resisting moment exerted onto the back by the elastic means said back is equipped with, thus making the adjustment of said means faster and more direct.
  • Another important purpose of the present invention is to provide for an adjustment system whose operation is easy and convenient for the user, even when the latter is normally sitting.
  • a further purpose is to provide for an adjustment system for office reclining chairs which also enables to block the back into a chosen position by operating said handle, normally used to vary the seat height.
  • the adjustment system according to the invention is generally indicated with the numeral 1.
  • It consists of a primary body 2 showing a lower seat 3 adapted to be engaged with an upper end of an upright, not shown in the enclosed figures, which defines the vertical stand of a chair.
  • the primary body 2 is turnably engaged with a support element 5 of the back of the chair along an oscillation axis 4.
  • the support elements 6 of the seat of the chair are located above the primary body 2.
  • said support elements include a first support element 6a hinged to the primary body 2 according to a first hinging axis 7a located before the oscillation axis 4 and parallel to it, and a second support element 6b hinged to the support element of the back 5 on a second hinging axis 7b located behind the oscillation axis 4 and parallel to it.
  • said hinging axis 7a and 7b, and the oscillation axis 4 are substantially lined up, so as to enable the inclination, with respect to the primary body 2, both of the support element 5 and, to a smaller extent, of the seat engaged with the support elements 6a and 6b.
  • the arrangement, substantially lined up, of the three axes enables to carry out a simple clearance, for instance on the rotation axis 7b, instead of a real slot.
  • the elastic means 8 include at least one element with linear strain, such as for instance a pair of cylindrical helical compression springs exerting their elastic forces according to action lines 8a, whose distance "b" from the oscillation axis 4 forms the arm contributing to define said resisting moment ( Figures 3 and 4).
  • the system according to the invention includes an adjustment group 9, simultaneously increasing or reducing both the elastic force exerted by the elastic means 8 and the arm "b" of said force with respect to the oscillation axis 4.
  • the adjustment group 9 is equipped with a control handle 10 laterally projecting from the seat.
  • the adjustment group 9 includes a housing 11 for each spring 8, said housing being divided into two half-shells, that is to say, a first half-shell 12 and a second half-shell 13 telescopically movable one with respect to the other in the sense of the linear strain of the corresponding spring 8, i.e. in the direction of the action line 8a.
  • the first half-shell 12 shows on its outer portion a lateral extension 12a slidingly coupled with a first track 14 integral with the primary body 2 and defined by a guiding groove perpendicular to the oscillation axis 4.
  • the second half-shell 13 shows on its outer and end portions a grooved seat 13a for a rolling element 15 sliding along a second track 16 integral with the support element 5 and also perpendicular to the oscillation axis 4.
  • the first track 14 ad the second track 16 are convergent one with respect to the other moving away from the oscillation axis 4, and the convergence angle they form increases with the increment of the inclination backward of the support element 5 and therefore of the back of the chair.
  • the operating screw 18 is oriented perpendicularly to the oscillation axis 4 and it is rotated by a control spindle 20 by means of a pair of cone-shaped toothed wheels including a first wheel 21 integral with said spindle and a second wheel 22 fitted onto an end of the operating screw 18.
  • the control spindle 20 is turnably engaged with the primary body 2, it is parallel to the oscillation axis 4 and it is connected on its end with the control handle 10.
  • the adjustment system for chairs according to the invention further comprises a blocking group 23 (Figs. 7-9) for the support element of the back 5 with respect to the primary body 2, said group being able to block said support element, and therefore the back integral with it, into a plurality of different inclined positions.
  • the blocking group 23 uses the same operating lever 24 (Fig. 5) which is used, according to a known technique, for the height adjustment of the seat in the embodiments in which the upright defining the vertical stand of the chair consists of a fluid-dynamic cylinder (not shown in the enclosed drawings). More precisely, the blocking group 23 provides for an equalizing element 25 integral with a control bar 26, parallel to the oscillation axis 4, the end of said bar being connected to a operating lever 24.
  • the rocker arm 25 is turned in a first sense, and more precisely counter-clockwise with reference for instance to Figure 1, it enables to alternately carry out, always in said first rotational sense, the release and the blocking of the support element 5 into one of said inclined positions.
  • rocker arm When said rocker arm is turned in a second sense, i.e. clockwise always with reference for instance to Figure 1, it enables to carry out the activation of the above-mentioned fluid-dynamic cylinder so as to adjust the height of the seat.
  • the blocking group 23 includes a slide 27 moving onto the primary body 2 along a sliding direction which is perpendicular to the oscillation axis 4, and a first member with linear elastic strain 28, for instance a compression spring, pushing the slide 27 in a first sliding sense 29 (Fig. 6).
  • the slide is movable, in contrast with the spring 28, along a second sliding direction 30 by means of a thrusting element defined by an arm 31 of the rocker arm 25 showing a second arm 32 for the action onto said fluid-dynamic cylinder.
  • Joint elements 33 are located on the slide 27 and on the support element 5 (Fig. 6), said joint elements being adapted to reciprocally interfere in order to prevent the rotation of said support element.
  • the blocking group 23 includes stop and release means 34 associated with the slide 27 and of a known type, for instance as described in the patent application for utility model no. ITBS970042 filed on 5.5.1997 by the present applicant.
  • Said stop and release means 34 have the function, alternately, to stop the slide 27, against the spring 28, in a first position (illustrated in Figures 6 and 7), in which the joint elements 33 interfere one with the other, and to release said slide in a second position (see Figure 8) to enable the following snap engagement of said elements under the action of the spring 28 (Figure 9).
  • the joint elements 33 include a blocking tooth 35, consisting of a shaped bar with a "L"-section sliding with its ends within a pair of guiding grooves 36 obtained in the primary body 2 and developing parallel to said sliding direction of the slide 27, so as to define the maximum stroke of said blocking tooth 35.
  • connection means 37 consisting in their turn of at least a second member with linear elastic strain 38, for instance two compression spring exerting an elastic thrust onto said blocking tooth so as to shift it closer to the slide, in contrast with the action exerted by the first member with elastic strain 28.
  • connection means 37 also include a support pin 39 integral with the slide 27 and adapted to guide and keep the spring 38.
  • the support pin 39 passes through a base connection 35a of the blocking tooth 35, which is therefore placed between the spring 38 and the slide 27.
  • a plurality of hollow seats 40 (Fig. 4) placed on an end portion 5a of the support element of the back 5 and each housing said blocking tooth 35.
  • Said shift involves on the one hand the increase or the decrease of the length of the arm "b" (see Figures 3 and 4) and on the other hand the reciprocal approaching or pushing away of the first and second half-shell 12 and 13, and therefore an increase or a decrease of the elastic force of the spring 8.
  • the first spring 28 partially compresses, as do the second springs 38.
  • the blocking tooth 35 does not come out of the seat into which it has been introduced because of the friction existing between the walls of said seat and the blocking tooth itself.
  • the invention shows important advantages.
  • the adjustment of the resisting moment exerted by the elastic means located between the primary body and the support element of the back is fast and effective, since it is possible to simultaneously modify the two quantities on which said moment depends, i.e. the elastic force and its arm with respect to the oscillation axis of the back.
  • the peculiar embodiment of the adjustment group of the resisting moment makes the use of the operating handle provided easy and practical, since said handle is placed in a convenient and easily accessible position.
  • the blocking group which should modify the inclination of the back and to block the latter with respect to the primary body of the system, beside being extremely practical since it only requires rotations of the operating lever it is provided with in the same direction, enables thanks to this characteristic to integrate into said operating lever the control of the height adjustment of the seat commonly present in office chairs, thus avoiding the addition of other operating levers.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
EP00830528A 2000-07-25 2000-07-25 Dispositif de réglage pour chaise inclinable de bureau ou similaire Withdrawn EP1175854A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00830528A EP1175854A1 (fr) 2000-07-25 2000-07-25 Dispositif de réglage pour chaise inclinable de bureau ou similaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00830528A EP1175854A1 (fr) 2000-07-25 2000-07-25 Dispositif de réglage pour chaise inclinable de bureau ou similaire

Publications (1)

Publication Number Publication Date
EP1175854A1 true EP1175854A1 (fr) 2002-01-30

Family

ID=8175418

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00830528A Withdrawn EP1175854A1 (fr) 2000-07-25 2000-07-25 Dispositif de réglage pour chaise inclinable de bureau ou similaire

Country Status (1)

Country Link
EP (1) EP1175854A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006114250A1 (fr) 2005-04-28 2006-11-02 Imarc S.P.A. Dispositif permettant de regler la force d'inclinaison de mecanismes de sieges de bureau
WO2006119209A2 (fr) * 2005-05-02 2006-11-09 Hni Technologies Inc. Siege a mecanisme de commande d'inclinaison, a appareil de commande de la limite d'inclinaison et a mecanisme de basculement du dossier
WO2009103389A1 (fr) * 2008-02-22 2009-08-27 Bock 1 Gmbh & Co. Kg Mécanisme pour une chaise de bureau
ES2426021R1 (es) * 2012-04-16 2013-11-06 Grupo Forma 5 S L Sistema de regulacion de la tension de un respaldo de silla

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0179185A2 (fr) * 1984-10-24 1986-04-30 Bürositzmöbelfabrik Friedrich-W. Dauphin GmbH & Co. Chaise, notamment chaise de bureau
DE3616475C1 (de) * 1986-05-15 1987-06-11 Kusch Co Sitzmoebel Hoehenverstellbarer,mit Gasdruckfeder ausgestatteter Drehstuhl,insbesondere Buerostuhl oder -sessel
GB2271053A (en) * 1992-09-30 1994-04-06 Edward L Stulik Reclining chair
DE4324545A1 (de) * 1993-07-22 1995-01-26 Trendoffice Bueromoebel Stuhl, insbesondere Bürostuhl

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0179185A2 (fr) * 1984-10-24 1986-04-30 Bürositzmöbelfabrik Friedrich-W. Dauphin GmbH & Co. Chaise, notamment chaise de bureau
DE3616475C1 (de) * 1986-05-15 1987-06-11 Kusch Co Sitzmoebel Hoehenverstellbarer,mit Gasdruckfeder ausgestatteter Drehstuhl,insbesondere Buerostuhl oder -sessel
GB2271053A (en) * 1992-09-30 1994-04-06 Edward L Stulik Reclining chair
DE4324545A1 (de) * 1993-07-22 1995-01-26 Trendoffice Bueromoebel Stuhl, insbesondere Bürostuhl

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006114250A1 (fr) 2005-04-28 2006-11-02 Imarc S.P.A. Dispositif permettant de regler la force d'inclinaison de mecanismes de sieges de bureau
WO2006119209A2 (fr) * 2005-05-02 2006-11-09 Hni Technologies Inc. Siege a mecanisme de commande d'inclinaison, a appareil de commande de la limite d'inclinaison et a mecanisme de basculement du dossier
WO2006119209A3 (fr) * 2005-05-02 2007-01-25 Hni Tech Inc Siege a mecanisme de commande d'inclinaison, a appareil de commande de la limite d'inclinaison et a mecanisme de basculement du dossier
WO2009103389A1 (fr) * 2008-02-22 2009-08-27 Bock 1 Gmbh & Co. Kg Mécanisme pour une chaise de bureau
US8733839B2 (en) 2008-02-22 2014-05-27 Bock 1 Gmbh & Co. Kg Mechanism for an office chair
ES2426021R1 (es) * 2012-04-16 2013-11-06 Grupo Forma 5 S L Sistema de regulacion de la tension de un respaldo de silla

Similar Documents

Publication Publication Date Title
CA2602917C (fr) Dispositif permettant de regler la force d'inclinaison de mecanismes de sieges de bureau
US7097249B2 (en) Tilting mechanism for a chair and chair having the same
US7946651B2 (en) Mechanism for adjusting the inclination of backrests in chairs and arm-chairs, particularly in office chairs
US9427085B2 (en) Chair arm assembly
US5447357A (en) Chair with inclinable seat
CA2260728C (fr) Mecanisme de fauteuil
AU2006228736B2 (en) Seat in particular office chair
EP0773133A3 (fr) Dispositif d'inclinaison à came rotative
US6712428B2 (en) Reclining device for chairs and chair with said reclining device
NL7907725A (nl) Ergonomische stoel.
KR20120098037A (ko) 한 개의 막대에 브레이크와 가속기능이 결합된 자동차 운전장치
JP2002034700A (ja) 揺動シートを備えた椅子
EP1175854A1 (fr) Dispositif de réglage pour chaise inclinable de bureau ou similaire
JP2019188126A (ja) 弾性的シーソー型フリーリクライニング機構および自由調節可能な回転椅子
US4335920A (en) Headrest for a dental chair
IL111089A (en) Height adjustment for the backs of chairs
JP5374129B2 (ja) ロッキング椅子
JP2002142898A (ja) 椅子における背凭れの傾動範囲調節装置
JPH0450846Y2 (fr)
US2170509A (en) Reclining chair
JP3834102B2 (ja) 椅子用肘掛け装置
KR200143731Y1 (ko) 위치고정수단을 구비한 의자용 링크기구
JPS5929579Y2 (ja) シ−トリクライナ−
EP1097660B1 (fr) Fermeture à glissière pour reglage de la position des chaises ou parties des chaises
JP2002142897A (ja) 椅子における背凭れの傾動範囲調節装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20020801