WO2004077999A1 - Dispositif de commande pour chaises de bureau et analogues - Google Patents

Dispositif de commande pour chaises de bureau et analogues Download PDF

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Publication number
WO2004077999A1
WO2004077999A1 PCT/IT2004/000093 IT2004000093W WO2004077999A1 WO 2004077999 A1 WO2004077999 A1 WO 2004077999A1 IT 2004000093 W IT2004000093 W IT 2004000093W WO 2004077999 A1 WO2004077999 A1 WO 2004077999A1
Authority
WO
WIPO (PCT)
Prior art keywords
command
lever
seat
control device
mobile
Prior art date
Application number
PCT/IT2004/000093
Other languages
English (en)
Inventor
Sergio Moreschi
Original Assignee
Co.Fe.Mo. S.P.A.
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 Co.Fe.Mo. S.P.A. filed Critical Co.Fe.Mo. S.P.A.
Priority to EP04715438A priority Critical patent/EP1601268A1/fr
Publication of WO2004077999A1 publication Critical patent/WO2004077999A1/fr

Links

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
    • 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

Definitions

  • the present invention relates to a control device for office chairs and the like.
  • office chairs generally present adjustable parts in height and tilt. These chairs might present the back, and sometimes also the seat, adjustable in tilt in respect to a base unit, for example of a box form, which is connected at the top end of an upright which defines the vertical support of the chair.
  • Particular mechanism are known which can tilt the back only, which are called “at permanent contact” , mechanisms which allow the independent tilt of back and seat , called “asynchronous” type, and mechanisms which allow the simultaneous and proportional tilt of the back and seat, which are called “synchronous” type.
  • Mechanisms are also known with reclining back and seat and solid in between, called “swinging" .
  • the pre-selection allows the preloading of a spring and to activate the locking through a command lever also when the locking element is not in a suitable position to mesh into a locking slot, in such a way that the engaging can happen automatically under the pressure of the spring as soon as the tilted portion is rotated in a suitable position to allow the locking.
  • the anti-shock function works in a similar way to command the unlocking even when the forces acting on the chair and therefore on the locking element will not allow the sudden extraction from the relative locking slot.
  • Mechanisms are also known which allow the change of the position of the seat between a limited number of angular positions, for example a horizontal position and two reclined positions of some degrees (typically 4°) and symmetrical in. relation to the horizontal position.
  • the known technique presents some drawbacks.
  • the known mechanisms in fact present always a structure rather complex and costly ' .
  • the means for the pre-selection and anti-shock are very cumbersome and require the necessity of proper designing of the entire mechanism of the chair.
  • the mechanisms for the pre-selection and anti-shock are made up of a series of elements which occupy a considerable space and restrict the positioning of other elements of the mechanism.
  • Such problems require the necessity of a very accurate and specific planning for each type of mechanism, with consequent higher costs of designing, realization, assembly and stocking of the mechanisms. It has also to be noted that for mechanisms to change the setting there are not any known mechanisms of preselection or anti-shock.
  • the technical task set at the base of the present invention is to invent a control device for office chairs and the like to be in a good enough position to obviate substantially the problems mentioned.
  • FIG. 2 is a second exploded prospective view of the device of figure 1;
  • fig. 3 is a top view of the device of figure 1;
  • fig. 4 is a section of the control device accord- ing to line IV-IV of figure 3;
  • fig. 5a, 5b and 5c show a section of the device, according to line V-V of figure 3, in three working positions;
  • fig. 6a, 6b and 6c show a lateral view of a part of the device in three working positions corresponding respectively to figures 5a, 5b and 5c ;
  • fig. 7 shows on a lateral view a mobile portion of the device.
  • a control device for office chairs and the like is globally shown with reference number 1.
  • the control device 1 is attached to a mechanism 2 for an office chair (shown only partially in the figure because the remaining elements are of a known type) , which essentially includes a basic unit fit to engage, through a connecting element, to the top end of an upright which defines the vertical support of the chair.
  • a mechanism 2 for an office chair (shown only partially in the figure because the remaining elements are of a known type) , which essentially includes a basic unit fit to engage, through a connecting element, to the top end of an upright which defines the vertical support of the chair.
  • On the base unit at least a turning portion of the chair is generally hinged in a known way, for example an support element for the back.
  • Mechanism 2 includes also an support element of the seat of the chair, assembled above the base unit.
  • Means of elastic support are usually also foreseen, such as a spring, placed between each turning portion in an independent way and the base unit, and therefore at least between the support element
  • the mechanism portion 2 shown on the figures is relative in particular to means 3 to change the setting of the support element of a chair, which are operatively activated by the control device 1.
  • Such means 3 in order to change the setting of the seat have at least a fixed portion 4 and at least a mobile portion 5 associated in a revolving way to the fixed portion 4.
  • One of such portions 4, 5 is attached to the base unit, while on the other the seat or the support element of the seat can be assembled.
  • the mechanism 2 contains two fixed portions 4, 4' and two mobile portions 5, 5' placed symmetrically in respect to the seat and working in conjunction with the control device 1.
  • the control device 1 contains a lever of command 6 which is associated externally to the chair mechanism 2 and it is mobile at least between two working positions to command selectively the locking and the unlocking of at least one mobile portion 5 of the mechanism 2.
  • the lever 6 is associated in a revolving way to the mechanism 2, and the two working positions are displaced at an angle, for example at 90° .
  • the device 1 also includes means of pre-selection and anti-shock 7 operatively placed in the command lever 6.
  • Such means of pre-selection and anti-shock 7 are preferably placed in a coaxial way to the control device 1.
  • the means of pre-selection and anti-shock 7 comprise at least bi-stable means 8 associated to the lever 6 to define two positions of stability of lever 6 corresponding to the two working positions.
  • the bi-stable means 8 include a seat of command 9 "having two working positions 9a connected by a transferring run 9b.
  • the seat of command 9 is operatively as- sociable to mechanism 2 and is preferably achieved on a buckle 10 fixable to a corresponding opening 11 of the mechanism 2. Such seat of command 9 could alternatively be obtained directly on mechanism 2.
  • the bistable means 8 include also a bi-stable element 12 associated to lever 6 and mobile in the seat of command 9 to define the two positions of stability for the lever 6 in correspondence with the two working portions 9a.
  • the working portions 9a of the seat of command 9 are sized in such a way to house the bi-stable element 12, while the transferring run 9b is slightly narrower of the bi-stable element 12 in order to present a predetermined resistance during the rotation of lever 6 and to prevent the passage of the same bi-stable element 12 if not under the manual action of the user.
  • the seat of command 9 is associated to the mobile and turning portion 5 (see figure 7) .
  • the means of preselection and anti-shock 7 include besides an element of mobile command 13 at least partially placed in the lever 6 and an elastic element 14 operatively active between the lever 6 and the element of command 13.
  • the element of command 13 includes a sleeve 15 mounted in a revolving way on lever 6 and fixed to a command shaft 16 extending from the lever 6 to command the locking and unlocking of mobile portion 5.
  • the sleeve 15 and the shaft of command 16 are fixed through a transversal pin 17.
  • the transversal pin 17 is inserted in a seat 15b of the sleeve 15 and in a corresponding seat 16b of the shaft 16 through an opening 6c in the lever 6.
  • the command shaft 16 has a working portion 16a having a smaller section along a first perpendicular axle to the longitudinal development of the command element 13 and a bigger section along a second perpendicular axle both to the longitudinal development of the command element 13 than to the first axle.
  • the command shaft 16 is associated in a revolving way to the mobile portion 5 and to the fixed portion 4, in correspondence to which there is a shaped seating 18 having for example three slots 18a with a bigger diameter of the bigger section of the command shaft 16, connected by parts having an inferior width to the bigger section of the command shaft 16.
  • the slots 18a and the shaft 16 could for example have a diameter of approximately 10 mm, while the parts with an inferior width could be of approximately 6 mm.
  • the seat cannot vary its tilt " , while when the shaft 16 is turned, preferably of 90°, the same shaft 16 can shift from one slot 18a to an other and the seat can change the setting.
  • the sleeve 15 has a seating-lock 15a for the elastic element 14, for example a coil spring 14, which is provided with a first extremity 14a cooperating with a portion of support of the lever 6 and of a second extremity 14a cooperating with a portion of support of sleeve 15.
  • the spring 14 is therefore put in action by the rotation of lever 6 and in consequence is inclined to rotate the sleeve 15 to compensate such displacement.
  • the lever 6 might include a lengthened body 6a hollow inside and a knob of command 6b interchangeable and fixable to the lengthened body 6a to rotate jointly to it, for example through a hexagonal coupling.
  • the mobile portions 5, 5' and fixed 4, 4' are realized in a symmetric way, to allow the assembly of the command mechanism 1 indifferently on both sides of the seat.
  • the control device 1 illustrated above has been associated to means 3 to change the setting of the seat purely as an example, inasmuch as the control device 1 illustrated becomes substantially universal, and it is therefore advantageously applicable in a similar manner to all the types of known mechanisms.
  • the device is therefore applicable to mechanisms at "permanent contact” , in which the support element of the seat is joined to the base unit and the only part that can be tilted is the back, to mechanisms of "synchronous" type, in which the support element of the seat is associated in a revolving way to the base unit and to the support element of the back to swing proportionally to the swinging of the elements of support of the back, to mechanisms of "swinging" type, in which the support element of the seat is fixed to the support element of the back to swing jointly to the same and also to mechanisms of "asynchronous” type, in which the support element of the seat is associated in a revolving way to the base unit, to swing in an independent way.
  • the device might also include a flexible element (not shown on the figures) operatively connected to the means of preselection and anti-shock 7, and in particular, to the element of command 13 or to the shaft of command 16.
  • a flexible element is suitable to extend itself inside the mechanism 2 to command selectively the locking and the unlocking of the mobile portion 5, which can be in particular the support element of a back or the support element of a seat of the chair.
  • FIG. 5a, 5b, 5c and 6a, 6b, 6c are illustrated in a schematic way three working phases of the control device 1, with the shifting from the position of the seat with the setting in a horizontal position (figures 5a and 6a) to a position of unlocking of the seat to shift to a different setting (figures 5c and 6c) .
  • the seat is in a locking position (figures 5a and 6a)
  • the spring 14 is relaxed and the shaft 16 is in position to lock in regard to a respective slot 18a.
  • the user turns the lever 6 of 90°, bringing the device in the illustrated position in the figures 5b and 6b, in which the shaft 16 is not rotated because the user's weight on the seat does not allow the rotation, but the bi-stable element 12 has passed in the opposite working position and the spring 14 has been loaded.
  • the spring 14 is not able to rotate the lever 6 backwards because the length of the transfer run 9b of the seat of command 9 presents a bigger resistance than the thrust of the lever 6.
  • the preloaded spring 14 turns the shaft 16 of 90°, in a position (illustrated in the figures 5c and 6c) in which the shaft 16 itself can pass in a different slot 18a changing the setting of the seat.
  • a control device in accordance with the present invention offers complete freedom in the designing of the locking device of the mechanism of the chair. Besides a control device according to the invention is particularly compact, efficient and of simple and fast realization.
  • a control device according to the invention is substantially universal in as much as it can be mounted without substantial modifications on all the types of mechanisms for chairs, permitting functions of pre-selection and anti-shock also on a mechanism to alter the setting of the seat.
  • the control device results in contained cost and reduces remarkably the designing costs, production, assembly, stocking and transport of the mechanisms of the chairs.

Landscapes

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

Abstract

Cette invention concerne un dispositif de commande (1) pour chaises de bureau et analogues comprenant un levier de commande (6) pouvant être associé à l'extérieur à un mécanisme (2) de la chaise, lequel levier est mobile entre au moins deux positions de travail permettant de commander sélectivement le verrouillage et le déverrouillage d'au moins une partie mobile (5) du mécanisme (2). Ce dispositif comprend une unité de présélection et antichoc (7) logée de façon opérationnelle dans le levier de commande (6). Cette unité de présélection et antichoc comprend au moins une unité bistable (8) associée au levier (6) et servant à définir deux positions de stabilité correspondant aux deux positions de travail opérationnelles, un élément d'une commande mobile (13) au moins partiellement logé dans le levier (6) et un élément élastique (14) opérationnellement actif entre le levier (6) et l'élément de commande (13).
PCT/IT2004/000093 2003-03-07 2004-02-27 Dispositif de commande pour chaises de bureau et analogues WO2004077999A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04715438A EP1601268A1 (fr) 2003-03-07 2004-02-27 Dispositif de commande pour chaises de bureau et analogues

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBS20030025 ITBS20030025A1 (it) 2003-03-07 2003-03-07 Dispositivo di comando per sedie da ufficio e simili.
ITBS2003A000025 2003-03-07

Publications (1)

Publication Number Publication Date
WO2004077999A1 true WO2004077999A1 (fr) 2004-09-16

Family

ID=32948186

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2004/000093 WO2004077999A1 (fr) 2003-03-07 2004-02-27 Dispositif de commande pour chaises de bureau et analogues

Country Status (3)

Country Link
EP (1) EP1601268A1 (fr)
IT (1) ITBS20030025A1 (fr)
WO (1) WO2004077999A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009109275A1 (fr) * 2008-03-07 2009-09-11 Moving S.R.L. Dispositif de réglage pour siège de bureau
ITTV20090110A1 (it) * 2009-05-27 2010-11-28 L I M A S N C Di Beccegato Gino & C Dispositivo di bloccaggio/sbloccaggio tra schienale e sedile o solo sedile o solo schienale, particolarmente per sedie.
WO2014060007A1 (fr) * 2012-10-19 2014-04-24 L&P Property Management Company Dispositif de réglage de tension pour une chaise et chaise

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2214234A5 (fr) * 1973-01-11 1974-08-09 Hugonet Ste Nouvelle Ets
WO2001070074A1 (fr) * 2000-03-24 2001-09-27 Giroflex-Entwicklungs-Ag Systeme d'assise et de dossier pour des sieges, notamment pour des chaises de bureau

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2214234A5 (fr) * 1973-01-11 1974-08-09 Hugonet Ste Nouvelle Ets
WO2001070074A1 (fr) * 2000-03-24 2001-09-27 Giroflex-Entwicklungs-Ag Systeme d'assise et de dossier pour des sieges, notamment pour des chaises de bureau

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009109275A1 (fr) * 2008-03-07 2009-09-11 Moving S.R.L. Dispositif de réglage pour siège de bureau
ITTV20090110A1 (it) * 2009-05-27 2010-11-28 L I M A S N C Di Beccegato Gino & C Dispositivo di bloccaggio/sbloccaggio tra schienale e sedile o solo sedile o solo schienale, particolarmente per sedie.
EP2255697A1 (fr) * 2009-05-27 2010-12-01 L.I.M.A. S.n.c. di Beccegato Gino & C. Dispositif de verrouillage/libération du dossier et/ou du siège, en particulier pour chaises
WO2014060007A1 (fr) * 2012-10-19 2014-04-24 L&P Property Management Company Dispositif de réglage de tension pour une chaise et chaise
AU2012392302B2 (en) * 2012-10-19 2016-01-28 L&P Property Management Company Tension adjust device for a chair and chair
US9451825B2 (en) 2012-10-19 2016-09-27 L&P Property Management Company Tension adjust device for a chair and chair

Also Published As

Publication number Publication date
EP1601268A1 (fr) 2005-12-07
ITBS20030025A1 (it) 2004-09-08

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