EP0030806A2 - Chaise avec mécanisme de siège réglable - Google Patents

Chaise avec mécanisme de siège réglable Download PDF

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Publication number
EP0030806A2
EP0030806A2 EP80304292A EP80304292A EP0030806A2 EP 0030806 A2 EP0030806 A2 EP 0030806A2 EP 80304292 A EP80304292 A EP 80304292A EP 80304292 A EP80304292 A EP 80304292A EP 0030806 A2 EP0030806 A2 EP 0030806A2
Authority
EP
European Patent Office
Prior art keywords
seat
chair
basic position
chamber
end wall
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Withdrawn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
EP80304292A
Other languages
German (de)
English (en)
Other versions
EP0030806A3 (fr
Inventor
Jacob Jensen
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.)
Labofa AS
Original Assignee
Labofa AS
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 Labofa AS filed Critical Labofa AS
Publication of EP0030806A2 publication Critical patent/EP0030806A2/fr
Publication of EP0030806A3 publication Critical patent/EP0030806A3/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Withdrawn legal-status Critical Current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
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/025—Rocking chairs with seat, or seat and back-rest unit, elastically mounted in a rigid frame
    • A47C3/026—Rocking chairs with seat, or seat and back-rest unit, elastically mounted in a rigid frame with a central column, e.g. rocking office chairs; Tilting chairs
    • 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—Supports for the head or the back
    • A47C7/40—Supports for the head or the back for the back
    • A47C7/44—Supports for the head or the back for the back with elastically-mounted frame
    • A47C7/446—Supports for the head or the back for the back with elastically-mounted frame with fluid springs

Definitions

  • This invention relates to a chair, in particular an office chair or a stool, comprising a seat which by the weight, when occupied, is movable away from a basic position by tilting on a horizontal transverse shaft against the resistance of a spring which returns the seat, when unloaded, into its basic position.
  • the spring serves on the whole solely as a return spring for the seat, but it offers also a certain, although usually very slight, resistance to the tipping or tilting of the seat when the load thereon changes, that is when the user changes his posture.
  • a chair seat does not in all cases afford an optimum support, because endeavours to maintain the most comfortable working posture might imply muscular exertion that is generally unnoticed at short sight, but in the long run may cause back-ache and pains across the loins and in the legs. Accordingly, a steady seat is actually preferred provided it has a correct height and inclination which, however, in practice must be adjustable according to individual wishes and in consideration of the desired working posture. On the other hand a steady seat might also cause inconveniences because the sitting pressure is too narrowly located to certain points or areas and may then inter alia impede blood circulation.
  • the chair according to the invention differs from the known designs in that the return spring is combined with a hydraulic or pneumatic damping mechanism which is operative solely when the seat is moved away from its basic position.
  • the invention is based on the understanding that a given basic position, viz. in reality a steady seat as mentioned above, is in principle preferred and that the said drawbacks of such a seat can be counteracted by the fact that the seat when permanently loaded slowly moves away from its basic position while, on the other hand, the seat quickly returns to its basic position when loading ceases or changes so as to permit such a return:
  • the damping may appropriately be adapted so that the maximum movement away from the basic position by constant loading requires 5 to 10 minutes and thus takes place almost unnoticeab- ly.
  • the loading is actually seldom constant for such a long period, and it can therefore be taken for granted that the chair seat is in continuous movement when occupied, viz. moves very slowly away from the basic position and then quickly in the opposite direction. Even though the user hardly notices such small movements of the position of the seat they are in many cases important to the comfort.
  • the above mentioned damping effect may suitably be attained in the way that one end of the housing of the spring device cooperates telescopically with a closed cylinder member and comprises, firstly an end wall firmly secured to the housing and defining a first pressure fluid chamber at the bottom of the cylinder member and, secondly a plunger which by the return spring is urged towards the end wall and together therewith defines a second chamber that is in communication with the first chamber through a throttle passage in the end wall which is further provided with a non-return valve that opens onto the first chamber.
  • Figs. 1 and 2 of the drawings 1 is a bushing mounted on the top of a support pillar -2 forming part of the frame, and to which a forward directed web plate 3 is secured carrying at its foremost end a transverse bearing tube 4 with a through-going shaft 5 associated with the seat frame 6 of the chair.
  • This seat frame can consequently tip or tilt about a transverse axis near the front edge 7 of the seat frame.
  • the seat frame comprises, in addition, two side rails of which only one is visible in the drawings and which at their rearmost end are provided with fittings 8 for a chair back, not illustrated.
  • Said spring device being at the one end connected with the seat frame 6 in a hinge 10 and being at its other end connected with a first arm of a two-armed lever 12 through a damper mechanism 11 that will be more specifically explained in the following.
  • Said lever 12 is pivotally mounted on the frame 6 by means of a pin 13, and its second arm carries a pin 14 that engages an inclined elongate aperture 15 in the web plate 3.
  • the housing 9 of the pneumatic spring device is extended by a cylindrical bushing 16 inserted into an interior recess in the housing and secured by means of a pair of locking rings 17 so as to actually form part of the housing 9 but, nevertheless, being separable therefrom.
  • the bushing 16 extends telescopically into a closed cylinder member 18 and comprises a firmly secured end wall 19 that defines a pressure fluid chamber 20 at the bottom of the cylinder member.
  • a second chamber 21 is defined between the end wall 19 and a plunger 22 that fits tightly with the bushing 16, said plunger being urged towards the end wall by means of a disc spring 23 supported at its opposite side by an abutment 24 fixedly secured in the bushing.
  • the two chambers 20 and 21 communicate with each other through a narrow throttle passage 25 as well as through a wider channel 26 comprising a non-return valve 27 that opens in the direction towards the chamber 20.
  • the bushing 16 together with the end wall 19 will be moved inwards into the cylinder member 18, but this movement is strongly impeded by the pressure fluid in chamber 20, because it can only slowly escape through the throttle passage 25 to the chamber 21 in which the plunger 22 is pressed backwards against the effect of the spring 23.
  • the passage 25 may be adapted so that the maximum movement causing the end wall 19 to abut the bottom of the cylinder member 18 takes 5 to 10 minutes. If the loading on the seat ceases or is considerably lightened during this period the frame 6 will quickly return to its basic position because the spring urged plunger 22 presses the pressure fluid back from the chamber 21 to the chamber 20, viz. through the channel 26 and the non-return valve 27.
  • the said period may be extended or shortened according to desire by adjustment of the throttle passage 25.
  • an adjusting screw 28 is mounted at the abutment 24, said screw being capable of longitudinally adjusting a needle 30 in the passage 25 through an axial mandrel 29 passing through the spring 23 and the plunger 22.

Landscapes

  • Seats For Vehicles (AREA)
  • Chairs Characterized By Structure (AREA)
EP80304292A 1979-12-13 1980-11-28 Chaise avec mécanisme de siège réglable Withdrawn EP0030806A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK5313/79 1979-12-13
DK531379A DK531379A (da) 1979-12-13 1979-12-13 Stol

Publications (2)

Publication Number Publication Date
EP0030806A2 true EP0030806A2 (fr) 1981-06-24
EP0030806A3 EP0030806A3 (fr) 1981-12-23

Family

ID=8141421

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80304292A Withdrawn EP0030806A3 (fr) 1979-12-13 1980-11-28 Chaise avec mécanisme de siège réglable

Country Status (2)

Country Link
EP (1) EP0030806A3 (fr)
DK (1) DK531379A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0164267A3 (fr) * 1984-06-08 1988-01-27 Hauserman Inc. Fauteuil inclinable
WO1990012220A1 (fr) * 1989-04-05 1990-10-18 Tooling Promotion Ab Dipositif hydraulique pour chaises
EP0906738A3 (fr) * 1997-10-02 2000-04-26 Rolf Benz AG Meuble d'assise, notamment chaise
US6402244B1 (en) * 1999-04-13 2002-06-11 Aida Development Gmbh Aircraft passenger seat
CN113475886A (zh) * 2021-08-25 2021-10-08 南通市久正人体工学股份有限公司 一种座椅前倾气弹簧安装结构及气弹簧的选型方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1226439B (de) * 1964-08-28 1966-10-06 Fritzmeier Rupert Sitzabfederung, insbesondere fuer nicht schienengebundene Fahrzeuge

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0164267A3 (fr) * 1984-06-08 1988-01-27 Hauserman Inc. Fauteuil inclinable
WO1990012220A1 (fr) * 1989-04-05 1990-10-18 Tooling Promotion Ab Dipositif hydraulique pour chaises
EP0906738A3 (fr) * 1997-10-02 2000-04-26 Rolf Benz AG Meuble d'assise, notamment chaise
US6402244B1 (en) * 1999-04-13 2002-06-11 Aida Development Gmbh Aircraft passenger seat
CN113475886A (zh) * 2021-08-25 2021-10-08 南通市久正人体工学股份有限公司 一种座椅前倾气弹簧安装结构及气弹簧的选型方法

Also Published As

Publication number Publication date
EP0030806A3 (fr) 1981-12-23
DK531379A (da) 1981-06-14

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Legal Events

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

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AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

PUAL Search report despatched

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Designated state(s): AT BE CH DE FR GB IT LU NL SE

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

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18D Application deemed to be withdrawn

Effective date: 19821203

RIN1 Information on inventor provided before grant (corrected)

Inventor name: JENSEN, JACOB