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WO1993015631A1 - Fauteuil - Google Patents

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Publication number
WO1993015631A1
WO1993015631A1 PCT/SE1993/000100 SE9300100W WO9315631A1 WO 1993015631 A1 WO1993015631 A1 WO 1993015631A1 SE 9300100 W SE9300100 W SE 9300100W WO 9315631 A1 WO9315631 A1 WO 9315631A1
Authority
WO
WIPO (PCT)
Prior art keywords
backrest
seat cushion
seat
base mount
support
Prior art date
Application number
PCT/SE1993/000100
Other languages
English (en)
Inventor
Håkan BERGKVIST
Johan Larsvall
Original Assignee
Ab Noco-Stolar
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 Ab Noco-Stolar filed Critical Ab Noco-Stolar
Priority to EP93904443A priority Critical patent/EP0625879A1/fr
Publication of WO1993015631A1 publication Critical patent/WO1993015631A1/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
    • 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
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers

Definitions

  • the present invention relates to a seat construction of the kind defined in the preamble of Claim 1 (see for instance EP-A-0,248,418, Figures 12-14).
  • a seat construction of the kind in which the lower part of the backrest and the seat cushion are pushed forwards as the backrest is inclined rearwardly from an upright position is, among other things, desirable in collective passenger transport vehicles, such as buses, coaches and railway carriages, for instance, so that when inclined rearwardly, the backrest will not encroach unduly on the space intended for the person seated immediately there- behind with his/her backrest raised to an upright posi ⁇ tion.
  • An object of the present invention is to provide a novel, advantageous seat of the aforesaid kind with which the aforesaid desired movement pattern can be achieved with the aid of simple, inexpensive devices which take-up only little space and which afford stable connection between the seat base-mount, the seat back ⁇ rest and the seat cushion.
  • the invention enables the devices required for adjusting the position of the seat to be given a very simple, constructive form and to be placed beneath the seat cushion in a manner which will have minimum encroachment on the seating space.
  • the inventive seat may be of the kind which includes a base mount which carries an ad ⁇ justable backrest, a seat cushion whose rear part is pivotally supported by the backrest and whose forward part has a supporting part which is dispiaceably carried by the base mount, wherein the arrangement is such that the bottom part of the backrest and the seat cushion are moved forwards in relation to the base mount as the backrest is moved rearwardly from an upright position (EP-A-0,248,418, Figures 12-14), and against this back- ground the seat is characterized in that the backrest has firmly connected thereto a frame structure which extends in beneath the seat cushion; in that the frame structure is movably supported by a support means on the base mount; in that the frame structure has guide means which coact with the support means and which extend essentially ob
  • the support means and the support part coacting with said support means are comprised of a guide curve and a runner.
  • the guide curve is preferably mounted on the base mount and the support part has the form of a runner which is mounted on the underside of the seat cushion and which runs along the guide curve as the backrest is inclined rearwardly.
  • the support part is formed by an abutment surface on the seat cushion.
  • This abutment surface is carried by a first end-part of at least one arm which is pivotally carried by the base mount at its other end-part.
  • the support means engages a carrier surface on said first end-part of the arm, and the support surface and the abutment surface are in constant abutment with one another along a limited region whose position depends on the pivotal position of the arm.
  • the support is formed by virtue of the fact that the frame structure is sup ⁇ ported in its forward region by the aforesaid arm and is pivotally connected to said arm at a point located between the two end-parts thereof.
  • the support is also formed by virtue of the fact that the rear part of the frame structure has at least one abutment surface which forms the aforesaid rail rests movably against a sup ⁇ portive projection carried by the base mount.
  • the arm may have a forwardly angled first end- part which includes a generally upwardly facing convex support surface which coacts with a preferably flat abutment surface.
  • the convex support surface may be located forwardly of the connecting point between the frame structure and the arm, wherein the radius of curvature of the support surface decreases in a rearward direction.
  • Figure 1 illustrates partially and highly schematically a first exemplifying embodiment of an inventive seat, with the seat backrest shown in its raised position.
  • Figure 2 illustrates the seat of Figure 1 with the backrest inclined rearwardly.
  • Figures 3 and 4 illustrate a second exemplifying embodi- ment of an inventive seat corresponding to the Figure 1 and 2 illustrations.
  • the seat illustrated in Figures 1 and 2 includes a base mount 1, a backrest 2 and a seat cushion 3.
  • the term seat cushion will be understood to include the horizon ⁇ tal seating surface of a seat.
  • the base mount 1 is comprised of a horizontal, rectangular box beam 100 which carries a base-mount element 101.
  • the element 101, and therewith the seat, can be moved transversely along the beam 100.
  • the backrest 2 includes a frame structure 4 which is angled forwardly from the general direction of the backrest and extends in beneath the seat cushion 3.
  • a downwardly extending arm 32 Provided in the rear end-part of the seat cushion 3 is a downwardly extending arm 32 whose lower end is pivotally connected to the frame structure 4 by means of a pivot shaft 11.
  • the frame structure 4 carries a guide 10, preferably in the form of a guide rail, on each side of the frame structure 4.
  • These guide rails 10 extend between two pairs of rollers or runners 5', 5", which are mutually spaced apart horizontally on the base-mount element 101, so as to stably receive the frame structure 4 and there ⁇ with the backrest 2.
  • the backrest is inclined by dis- placement of the rails 10 through the pair of rollers.
  • Each roller pair 5', 5" comprises two rollers 52, 53 which are arranged to run on the upper side and the bottom side of respective guide rails 10.
  • the roller pair 5' is carried by a generally vertical linkage arm 51 which is pivotally connected to the base-mount ele ⁇ ment 101 by the shaft of the bottom roller 53.
  • the roller pair 5" is similarly carried by a generally vertical linkage arm 51, wherein the shaft of the upper roller 52 forms a pivot journal for the arm 51 on the base-mount element 101.
  • the upper ends of the two link- age arms 51 are biassed towards one another by means of a pull spring 54.
  • This arrangement of pivotable linkage arms 51 and the spring load acting thereon provides play-free abutment of the two rollers 52 in each roller pair with the rail 10, while the illustrated journals of the arms 51 cause the frame structure 4 to rest stably on the base mount, at least when the backrest 1 is subjected to force in its rearwardly inclined direction.
  • a roller track 23 Mounted on the upper part of the element 101 is a roller track 23.
  • a support arm 31 Mounted on the underside of the forward region of the seat cushion 3 is a support arm 31 which carries a support runner 33 which runs on the track 23.
  • a support arm 32 Mounted on the underside of the rear part of the seat cushion 3 is a support arm 32 whose bottom end is pivotally con- nected to the frame structure 4 by means of a pivot shaft 11.
  • the arm 32 has considerable length and the seat cushion 3 will therefore be moved forwards in a favourable manner as the backrest 2 is swung backwards.
  • the arm 31 carrying the runner 33 forms the forward support part of the seat cushion 3.
  • the rails 10 and the track 23 are slightly concave in an upward direction and are configured so that the height or vertical elevation of the front edge of the seat cushion will be held essentially constant or will decrease as the backr. sv is swung from its upright position to a rearwardly inc ; -.ned position.
  • the guide 10 of the illustrated embodiment has a curva- ture such that the region of its centre of curvature will be located generally above the base mount 1 and also above the seat cushion 3, for instance immediately above half the length extension of the seat cushion 3, when the backrest 2 is inclined forwardly to a maximum, wherein said centre region lies, for instance, at a height above the seat cushion 3 which corresponds to the length of the seat cushion.
  • the mecha ⁇ nism which functions to move the seat to its inclined position may conventionally be assisted by air springs when adjusting the seat from a rearwardly inclined position to an upright position.
  • means may be provided for locking the seat in any chosen position between the two end positions illustrated in Figures l and 2.
  • Movable stop means may also be provided for adjusting the effective length of the guide 10 or the effective length of the track 23, and therewith adjust the limit positions for the backrest and seat cushion in the upright and rearwardly inclined positions of the seat.
  • the rear part of the seat cushion 3 is lowered while, at the same time, the forward end of the seat cushion 3 is lowered in a controlled fashion in accor- dance with the shape of the rail 10 and the curve 23.
  • the rail 10 can be assumed to have a circular shape, in which case the point E will lie in a vertical plane centrally between the roll pairs 5', 5" at a height above said roller pairs which corresponds to the radius of curvature of the rail 10.
  • the backrest 2 and the frame structure 4 will thus be swung around the point E, which is conveniently located in the region of the common centre of gravity of the backrest and the seat cushion, including a person seated thereon.
  • FIG. 3 and 4 is analo ⁇ gous with the embodiment illustrated in Figures 1 and 2 and operates in a similar manner, wherein those elements in Figures 3 and 4 which at least correspond essentially to the elements illustrated in Figures l and 2 have been identified with the same reference numerals.
  • the base mount 1 supports the backrest 2 through the intermediary of a suitable supportive projection 5 in the form of a rotatably journalled support roller, and an arm 6 which has a first, forwardly angled end-part 7 and the other end-part of which is pivotally journalled in the base mount 1.
  • the arm 6 is pivotally journalled in the front region of the frame structure 4 at a point 9 located between said end-parts.
  • the rearward region of the frame structure 4 has an abutment surface 10 which rests against the supportive projection 5.
  • the surface 10 forms the upper defining surface of a slot which, when the backrest is raised, extends generally obliquely rearwards and upwards and the end surfaces of which determine the extremities to which the backrest 2 can be raised and lowered, by engagement with the supportive projection 5.
  • the abut ⁇ ment surface 10 has, advantageously, an obliquely rear- wardly and upwardly curved extension.
  • the seat cushion 3 has a flat abutment surface 12 which, in a forward region of the seat, lies against a convex support surface 13 on the end-part 7 of the arm 6. It will be seen that the surfaces 12, 13 contact one another essentially along a line which extends perpendicularly to the plane of the drawing and whose position along the surfaces 12, 13 will be dependent on the position to which the arm 6 is swung.
  • the curvature of the support surface 13 is chosen so that the height of the front edge of the seat cushion 3 above the floor will decrease as the backrest 2 is swung from its upright position to its rearwardly in ⁇ clined position.
  • the seat cushion may be provided with a curved seat-height determining abutment surface and the arm part 7 may be provided with a sup ⁇ port surface in the form of a support runner, for in ⁇ stance.
  • the seat provides a favourable sitting position, for instance, from the aspect of work perfor ⁇ mance, when the backrest is in its upright position, and will provide a favourable seating position from a rest ⁇ ing aspect when the backrest is in a rearwardly inclined position, with the angle of the backrest and the seat cushion changed and the seat cushion adjusted to a lower height above the ground, without encroaching unduly on the space provided for a person seated immediately behind the seat.
  • the frame structure 4 and the seat cushion 3 are supported from beneath on opposite sides of their respective back and/or front end-parts.
  • the seat cushion 3 can be supported on opposite sides of its back region and/or of its front region.
  • the frame structure 4 may include two rails 10 which are separated in the trans ⁇ verse direction of the seat and each of which is guided by a respective support 5.
  • the curved track 23 may be mounted on the seat cushion 3 and the runner 31, 33 mounted on the base mount l as an alternative to the embodiment illustrated in Figures 3 and 4.
  • the inventive arrangement may also include air springs which assist in moving a rearwardly inclined backrest to its upright position in a conventional manner, and means may be provided for locking the seat in any selected position between the limit positions shown in Figures 1 and 2.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs Characterized By Structure (AREA)

Abstract

Un fauteuil comprend un support de base (1) qui soutient un dossier réglable (2) et un coussin (3) dont la partie arrière est supportée de manière pivotante par le dossier (2) et dont la partie avant possède une partie de soutien (31, 33; 12) qui est portée de manière mobile par le support de base (1). L'agencement est conçu de telle façon que la partie inférieure du dossier (2) et le coussin du siège (3) se déplacent vers l'avant par rapport au support de base (1) lorsque le dossier (2) est incliné vers l'arrière à partir d'une position verticale. Le dossier (2) est solidement relié à une structure châssis (4) qui s'étend au-dessous du coussin du siège (3); cette structure châssis (4) est soutenue de façon mobile par un support (5', 5'; 5, 6, 8, 9) monté sur le support de base (1) et possède un dispositif de guidage (10) qui fonctionne avec le support (5', 55'; 5) et qui, dans la position verticale du dossier (2) s'étend généralement vers l'arrière et vers le haut; le dispositif support (23, 6, 7, 8, 13) relié au support de base (1) soutient la partie support avant (31, 33; 12) du coussin (3) du siège en vue de se déplacer le long d'une voie prédéterminée (23); le dispositif de guidage (10) et la voie de déplacement (23) ont des extensions telles que la distance par rapport au sol du bord avant du coussin (3) sera maintenu constante ou sera réduite lorsque le dossier (2) sera basculé de sa position verticale à une position inclinée vers l'arrière.
PCT/SE1993/000100 1992-02-10 1993-02-09 Fauteuil WO1993015631A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP93904443A EP0625879A1 (fr) 1992-02-10 1993-02-09 Fauteuil

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9200382-1 1992-02-10
SE9200382A SE469870B (sv) 1992-02-10 1992-02-10 Stol med inställbart ryggstöd och sits

Publications (1)

Publication Number Publication Date
WO1993015631A1 true WO1993015631A1 (fr) 1993-08-19

Family

ID=20385270

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1993/000100 WO1993015631A1 (fr) 1992-02-10 1993-02-09 Fauteuil

Country Status (3)

Country Link
EP (1) EP0625879A1 (fr)
SE (1) SE469870B (fr)
WO (1) WO1993015631A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998016138A1 (fr) * 1996-10-11 1998-04-23 Giroflex Entwicklungs Ag Siege, notamment siege de bureau
US8061755B2 (en) * 2004-09-18 2011-11-22 Otto Bock Healthcare Gmbh Vehicle with driver's seat with adjustable inclination
WO2012032336A1 (fr) * 2010-09-08 2012-03-15 Hilary Rolf Birkbeck Mécanisme de siège coulissant
EP2559357A1 (fr) * 2011-08-15 2013-02-20 BMA Ergonomics B.V. Chaise inclinable
US9554652B2 (en) 2010-09-15 2017-01-31 Hilary Rolf Birkbeck Link chair action

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2471024A (en) * 1946-10-04 1949-05-24 Roy A Cramer Chair with tilting back and automatically shiftable seat
EP0320478A1 (fr) * 1987-12-08 1989-06-14 Ring Mekanikk A.S. Chaise réglable
US5058954A (en) * 1988-07-07 1991-10-22 Kan Chee Lee Body contour support structure for travelers and audiences
EP0477762A2 (fr) * 1990-09-28 1992-04-01 Siemens Aktiengesellschaft Chaise de relaxation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2471024A (en) * 1946-10-04 1949-05-24 Roy A Cramer Chair with tilting back and automatically shiftable seat
EP0320478A1 (fr) * 1987-12-08 1989-06-14 Ring Mekanikk A.S. Chaise réglable
US5058954A (en) * 1988-07-07 1991-10-22 Kan Chee Lee Body contour support structure for travelers and audiences
EP0477762A2 (fr) * 1990-09-28 1992-04-01 Siemens Aktiengesellschaft Chaise de relaxation

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998016138A1 (fr) * 1996-10-11 1998-04-23 Giroflex Entwicklungs Ag Siege, notamment siege de bureau
US5971481A (en) * 1996-10-11 1999-10-26 Giroflex Entwicklungs Ag Chair, specially an office chair
US8061755B2 (en) * 2004-09-18 2011-11-22 Otto Bock Healthcare Gmbh Vehicle with driver's seat with adjustable inclination
WO2012032336A1 (fr) * 2010-09-08 2012-03-15 Hilary Rolf Birkbeck Mécanisme de siège coulissant
CN103458737A (zh) * 2010-09-08 2013-12-18 希拉里·罗尔夫·伯克贝克 滑动椅子装置
US9215932B2 (en) 2010-09-08 2015-12-22 Hilary Rolf Birkbeck Slide chair action
US9554652B2 (en) 2010-09-15 2017-01-31 Hilary Rolf Birkbeck Link chair action
EP2559357A1 (fr) * 2011-08-15 2013-02-20 BMA Ergonomics B.V. Chaise inclinable

Also Published As

Publication number Publication date
SE9200382D0 (sv) 1992-02-10
SE9200382L (sv) 1993-08-11
EP0625879A1 (fr) 1994-11-30
SE469870B (sv) 1993-10-04

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