EP0360763A1 - Stuhl mit schwingbarer und durch eine einstellbare Feder zurückgehaltener Lehne - Google Patents

Stuhl mit schwingbarer und durch eine einstellbare Feder zurückgehaltener Lehne Download PDF

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Publication number
EP0360763A1
EP0360763A1 EP89830377A EP89830377A EP0360763A1 EP 0360763 A1 EP0360763 A1 EP 0360763A1 EP 89830377 A EP89830377 A EP 89830377A EP 89830377 A EP89830377 A EP 89830377A EP 0360763 A1 EP0360763 A1 EP 0360763A1
Authority
EP
European Patent Office
Prior art keywords
backrest
seat
chair
plate
supporting
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Withdrawn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
EP89830377A
Other languages
English (en)
French (fr)
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
Publication of EP0360763A1 publication Critical patent/EP0360763A1/de
Withdrawn legal-status Critical Current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
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/441—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with adjustable elasticity
    • 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—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/443—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with coil springs

Definitions

  • This utility model concerns a chair or armchair with swinging backrest.
  • Office chairs or armchairs are already known, the seat of which is adjustable in height, since it is fixed to an amount of extendable support and the back of which is articulated to the seat and liable to oscillations due to the backward push. exercised by the person seated on the chair or armchair, these oscillations being contrasted by elastic means.
  • the chair or armchair proposed here comprising a plate supporting the seat fixed on a height-adjustable upright and an element supporting the backrest, is characterized in that the element which supports the backrest is articulated at an intermediate part at the - below the seat plate by means of a horizontal axis positioned transversely to the seat surface, and in that the seat and the backrest are connected, at a distance from the articulation axis, by an associated tie rod to a capsule with telescopic elements comprising a precompressed spring capable of contrasting the displacements of the backrest around the above-mentioned axis as a function of the thrusts applied thereto.
  • the chair in question comprises a plate (10) for supporting the seat which is fixed to the top of an upright (11) applied to a base for chairs - not shown - and extensible in height either mechanically or by means of a spring gas, but in any case in a known manner which does not require a detailed description.
  • a plate (10) for supporting the seat which is fixed to the top of an upright (11) applied to a base for chairs - not shown - and extensible in height either mechanically or by means of a spring gas, but in any case in a known manner which does not require a detailed description.
  • Below the plate (10), in its intermediate part, is articulated the foot of an L-shaped element (12) intended to carry the back of the chair.
  • This support element (12) has a forked part (13), possibly applied, mounted on a pivot (14), that is to say on the articulation axis of the aforementioned element, mounted inside a sleeve (15) fixed transversely below the plate (10).
  • the back support element is therefore capable of angular displacements relative to the plate (10) of the seat on the pivot (14), these displacements being however contrasted by an adjustable spring device (16) placed below the aforementioned plate (10).
  • the device (16) comprises a rigid tie rod (17) hooked in (17 ′) to the plate (10) at a certain distance from the articulation axis (14) and extinguishing downwards through an eyelet ( 12 ′) in the support element (12) of the backrest.
  • the lower end of the tie rod (17) is screwed into a conical metal washer (17 ⁇ ), placed and stopped by a cup (18) associated with a sliding and complementary cover (19) so that these two elements (v. Fig. 3) form a capsule containing a precompressed helical spring (20).
  • the cover (19) of the capsule acts against the support element (12) of the seat and the action of the spring tends to maintain this support in a position moved forward - continuous lines in FIG.
  • each push (F) from front to back towards the back of the backrest will determine, on the other hand, a rearward movement of the backrest support (12) according to the rotation on the pivot, the maximum displacement being limited by at least one projection (13 ′) of the fork (13) and intended to press below the plate (10).
  • this displacement is contrasted by the spring (20) which will load and therefore limit it depending on the thrust exerted on the backrest.
  • the contrast on the part of the spring and therefore the oscillation behind the back support (12) can on the other hand be adjusted with precision by means of a focusing of the preload of the spring itself inside the capsule by screwing the cup (18) or pulling it (17).

Landscapes

  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chairs Characterized By Structure (AREA)
EP89830377A 1988-09-09 1989-09-05 Stuhl mit schwingbarer und durch eine einstellbare Feder zurückgehaltener Lehne Withdrawn EP0360763A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8807070U IT215898Z2 (it) 1988-09-09 1988-09-09 Sedia con schienale oscillante contrastato da una molla registrabile.
IT707088U 1988-09-09

Publications (1)

Publication Number Publication Date
EP0360763A1 true EP0360763A1 (de) 1990-03-28

Family

ID=11123921

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89830377A Withdrawn EP0360763A1 (de) 1988-09-09 1989-09-05 Stuhl mit schwingbarer und durch eine einstellbare Feder zurückgehaltener Lehne

Country Status (2)

Country Link
EP (1) EP0360763A1 (de)
IT (1) IT215898Z2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009057168A1 (en) 2007-10-30 2009-05-07 Donati S.P.A. A mechanism for adjusting the pre-load of a stiffening spring for seats

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579918A (en) * 1947-01-25 1951-12-25 Roland J Freeman Cushioning assembly unit for back rests
US3027191A (en) * 1960-04-11 1962-03-27 Lie Finn Chair construction
GB1203783A (en) * 1967-05-03 1970-09-03 G K N Sankey Ltd Formerly Jose Improvements in or relating to chairs having hinged backrests
US4711491A (en) * 1986-06-09 1987-12-08 Jonathan Ginat Swivel tilt mechanism for chair

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579918A (en) * 1947-01-25 1951-12-25 Roland J Freeman Cushioning assembly unit for back rests
US3027191A (en) * 1960-04-11 1962-03-27 Lie Finn Chair construction
GB1203783A (en) * 1967-05-03 1970-09-03 G K N Sankey Ltd Formerly Jose Improvements in or relating to chairs having hinged backrests
US4711491A (en) * 1986-06-09 1987-12-08 Jonathan Ginat Swivel tilt mechanism for chair

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009057168A1 (en) 2007-10-30 2009-05-07 Donati S.P.A. A mechanism for adjusting the pre-load of a stiffening spring for seats

Also Published As

Publication number Publication date
IT8807070V0 (it) 1988-09-09
IT215898Z2 (it) 1991-03-18

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