SE469870B

SE469870B - Chair with adjustable backrest and seat

Info

Publication number: SE469870B
Application number: SE9200382A
Authority: SE
Inventors: J Larsvall; H Bergkvist
Original assignee: Noco Stolar Ab
Priority date: 1992-02-10
Filing date: 1992-02-10
Publication date: 1993-10-04
Also published as: WO1993015631A1; EP0625879A1; SE9200382D0; SE9200382L

Description

20 25 30 35 469 870 Den i fig. 1 och 2 visade stolen har ett underrede 1, ett ryggstöd 2 och en sits 3. Ryggstödet 2 innefattar en fast med detsamma förbunden och in under sitsen 3 sig sträckande ramanordning 4. Underredet 1 uppbär rygg- stödet 2 via ett lämpligen som en roterbart lagrad stöd- rulle utformat stödutsprång 5 och en arm 6, som har ett första, framåt avvinklat ändparti 7 och som vid 8 har sitt motsatta ändparti svängbart lagrat i underredet 1. The chair shown in Figs. 1 and 2 has a base 1, a backrest 2 and a seat 3. The backrest 2 comprises a frame device 4 fixedly connected thereto and extending into under the seat 3. The base 1 supports the back the support 2 via a support projection 5 suitably shaped as a rotatably mounted support roller and an arm 6, which has a first, forwardly angled end portion 7 and which at 8 has its opposite end portion pivotally mounted in the chassis 1.

I en punkt 9 mellan de motsatta ändpartierna är armen 6 svängbart lagrad i det främme området av ramanordningen 4.At a point 9 between the opposite end portions, the arm 6 is pivotally mounted in the front area of the frame device 4.

Såsom framgår vid jämförelse mellan fig. 1 och 2, sträcker sig armen 6 snett bakåt och uppåt,när ryggstödet 2 be- finner sig i maximalt upprest läge, samt snett framåt och uppåt, när ryggstödet befinner sig i maximalt bakåt- fällt läge. Ramanordningen 4 vilar i sitt bakre område med en anliggningsyta 10 mot stödutsprånget 5. Ytan 10 ut- gör i det visade utförandet av stolen den övre begränsningsytan hos en slits, vilken i ryggstödets upp- resta läge sträcker sig väsentligen snett bakåt och upp- åt och vars begränsningsändytor genom ingrepp en stöd- utsprånget bestämmer ändlägena för det fällbara och uppresbara ryggstödet 2. Med speciell fördel har anligg- ningsytan 10 på det visade sättet en snett bakåt och uppåt krökt sträckning med ryggstödet 3 i det uppresta läget.As can be seen from the comparison between Figs. 1 and 2, the arm 6 extends obliquely backwards and upwards, when the backrest 2 is in the maximum upright position, and obliquely forwards and upwards, when the backrest is in the maximum reclined position. The frame device 4 rests in its rear area with an abutment surface 10 against the support projection 5. In the shown embodiment of the chair, the surface 10 constitutes the upper limiting surface of a slot, which in the raised position of the backrest extends substantially obliquely backwards and upwards and whose limiting end surfaces by engagement a support projection determine the end positions of the folding and upright backrest 2. With special advantage, the abutment surface 10 has in the manner shown an obliquely backward and upwardly curved extension with the backrest 3 in the upright position.

Sitsen 3 är i ett bakre område av densamma uppburen av ramanordningen 4 svängbart kring en axel 11. Denna är lämpligen på det visade sättet belägen på väsentligt avstånd under sitsens 3 sittyta, varigenom sitsen 3 kommer att skjutas framåt och samtidigt dess bakre om- råde kommer att sänkas, när ryggstödet 2 svänges från upprest till bakåtfällt läge. I ett främre område vilar sitsen 3 med en i det visade exemplet plan anliggnings- yta 12 mot en konvex bäryta 13 på ändpartiet 7 av armen 6. Det inses att ytorna 12, 13 har kontakt med varandra 10 15 20 25 30 35 469 87-8 väsentligen utefter en vinkelrätt mot ritningsplanet riktad linje, vars läge utefter ytorna 12, 13 är bero- ende av armens 6 svängningsläge. Krökningen av bärytan 13 är vald så, att stolsitsens 3 framkantshöjd under svängning av ryggstödet 2 från upprest till bakàtfällt läge avtager.The seat 3 is in a rear area thereof supported by the frame device 4 pivotable about an axis 11. This is suitably located in the manner shown at a considerable distance below the seat surface of the seat 3, whereby the seat 3 will be pushed forward and at the same time its rear area will to be lowered, when the backrest 2 is swung from upright to reclined position. In a front area the seat 3 rests with a planar abutment surface 12 in the example shown against a convex support surface 13 on the end portion 7 of the arm 6. It will be appreciated that the surfaces 12, 13 are in contact with each other. 8 substantially along a line perpendicular to the drawing plane, the position of which along the surfaces 12, 13 is dependent on the pivoting position of the arm 6. The curvature of the support surface 13 is chosen so that the front edge height of the chair seat 3 during pivoting of the backrest 2 from upright to reclined position decreases.

Vid omställning av stolen från det i fig. 1 visade uppresta läget mot det i fig. 2 visade bakåtfällda läget, vilket kan ske genom utövning av ett bakåtriktat tryck på ryggstödets 2 övre område, förflyttas ryggstödets undre område framåt relativt underredet 1. Härvid rör sig anliggningsytan 10 framåt relativt stödutsprânget 5 och svänges armen 6 framåt eller medurs. Sitsen 3 för- skjutes likaså framåt genom förbindingen vid ll med ram- anordningen 4, varvid sitsens bakre område sänkes i be- roende av formen av ytan 10 och läget av utsprånget 5, samtidigt som sitsens främre ände kontrollerat sänks i beroende av kurvformen på bärytan 13, som kan sägas av- rulla mot anliggningsytan 12. Härigenom kan i det upp- resta läget erhållas en ur t.ex. arbetsprestationssyn- punkt gynnsam sittställning och kan i det bakåtfällda läget erhållas en ur vilosynpunkt gynnsam ställning med ändrad ryggstöds- och sitslutning samt lägre sitshöjd, utan att detta i besvärande grad inkräktar på utrymmet för en sittande i en bakomvarande stol.When adjusting the chair from the upright position shown in Fig. 1 to the reclined position shown in Fig. 2, which can take place by applying a backward pressure on the upper area of the backrest 2, the lower area of the backrest is moved forward relative to the base 1. This moves the abutment surface 10 forward relative to the support projection 5 and the arm 6 is pivoted forward or clockwise. The seat 3 is also displaced forwards through the connection at 11 to the frame device 4, whereby the rear area of the seat is lowered depending on the shape of the surface 10 and the position of the projection 5, while the front end of the seat is lowered in a controlled manner. 13, which can be said to roll off against the abutment surface 12. In this way, in the raised position, one can be obtained from e.g. from a performance point of view favorable sitting position and in the reclined position a position favorable from a resting point can be obtained with changed backrest and seat inclination and lower seat height, without this interfering with the space for a person sitting in a rear seat.

Det torde inses, att ramanordningen 4 och sitsen 3 i praktiken är understödda vid motsatta sidor vid deras bakre och/eller främre ändpartier. Sålunda kan sitsen 3 uppbäras svängbart vid motsatta sidor i sitt bakre om- råde och kan den uppvisa två i stolens tvärriktning åt- skilda anliggningsytor 12, som vilar mot var sin bär- yta 13 på ett ändparti 7 av en arm 6, vars övre område har stor utsträckning i stolens tvärriktning, eller var sin arm 6 belägna vid var sin sida av stolen. Vidare kan ramanordningen 4 uppvisa två i stolens tvärriktning åt- skilda anliggningsytor 10, som vilar mot var sitt av 10 15 20 469 970 underredet l uppburet stödutsprång 5, och kan den vid tvâ i stolens tvärriktning åtskilda punkter 9 vara svängbart förbunden med en enda arm 6 eller med tvâ i sidled åtskilda armar 6. Det inses vidare, att man i stället för en rak anliggningsyta 12 och en sitsfram- kantens höjdläge bestämmande, krökt bäryta 13 kan anord- na en höjdläget bestämmande, kurvformig anliggningsyta på sitsen och t.ex. en som stödrulle utformad bäryta på armpartiet 7.It will be appreciated that the frame device 4 and the seat 3 are in practice supported at opposite sides at their rear and / or front end portions. Thus, the seat 3 can be pivotally supported at opposite sides in its rear area and it can have two abutment surfaces 12 separated in the transverse direction of the chair, which rest against their respective bearing surface 13 on an end portion 7 of an arm 6, the upper area of which has a large extent in the transverse direction of the chair, or each arm 6 is located at each side of the chair. Furthermore, the frame device 4 can have two abutment surfaces 10 separated in the transverse direction of the chair, which rest against each support support 5 supported by the chassis 1, and it can be pivotally connected to a single arm at two points 9 transversely in the transverse direction of the chair. 6 or with two laterally separated arms 6. It is further understood that instead of a straight abutment surface 12 and a height-adjusting, curved bearing surface 13 determining the height of the seat front edge, a height-determining, curved abutment surface on the seat and e.g. . a support surface designed as a support roller on the arm portion 7.

Uppfinningen är sålunda icke begränsad till det ovan med hänvisning till ritningen beskrivna utförandet utan kan realiseras på godtyckligt sätt inom ramen för den i patentkraven definierade uppfinningstanken.The invention is thus not limited to the embodiment described above with reference to the drawing, but can be realized in any manner within the scope of the inventive idea defined in the claims.

Stolinställningsanordningen kan på brukligt sätt vara t.ex. luftfjäderassisterad från bakátfällt till upp- rest läge. Vidare kan vara anordnade organ för låsning av stolen i ett valfritt inställningsläge mellan de båda i fig. l och 2 visade ändlägena. Eventuellt kan även finnas flyttbara anslag för omställning av anliggnings- ytans 10 längd och/eller armens 6 svängningsvinkel och därmed för omställning av ändlägena för ryggstöd och sits i stolens uppresta och bakåtfällda lägen.The chair adjustment device can in the usual way be e.g. air spring assisted from rear folded to raised position. Furthermore, means can be provided for locking the chair in an optional setting position between the two end positions shown in Figs. 1 and 2. There may also be movable stops for adjusting the length of the abutment surface 10 and / or the angle of rotation of the arm 6 and thus for adjusting the end positions for the backrest and seat in the chair's upright and reclined positions.

Claims

10 15 20 25 30 35 .ha O \ MD Of.) -A CD Patentkrav

A chair, comprising a base (1), which carries a backrest (2) with adjustable inclination and a seat (3), which in a rear area is pivotally supported by the backrest and in a front area is supported by a first end portion (7) of at least one arm (6), which at its opposite end portion (8) is pivotally supported by the base (1), the arrangement being such that the lower part of the backrest (2) and the seat (3) are pushed forward when the backrest is folded backwards from an upright position, characterized in that the backrest (2) comprises a frame device (4) fixedly connected thereto and extending under the seat (3), which in its front area is supported via and is pivotally connected to said arm (6) at a point (9) between its opposite end portions, the arm having different pivoting positions, when the backrest is in the upright position and when the backrest is in the reclined position, and which frame device (4) in its rear 'area with at least one abutment surface (10), which is raised in the backrest (2) position extends substantially obliquely backwards and upwards, rests slidably against a support projection (5) supported by the chassis (1), and the seat (3) with a bearing surface (12) rests against a bearing surface (13) on said first end portion (7). ) of the arm, which surfaces (12, 13) constantly abut each other along a limited area, the position of which depends on the pivoting position of the arm (6), and wherein the extension of the surfaces is such that the front edge height of the chair seat (3) during pivoting of the backrest (2) from the upright to the reclined position is kept substantially constant or decreases.

Chair according to claim 1, characterized in that the arm (6) has a forwardly angled first end portion (7) with a substantially upwardly facing convex support surface (13) for co-operation with a preferably planar abutment surface. 10 15 20 25 30 35 469 870

Chair according to claim 1 or 2, in that the convex support surface (13) is located in front of the pre-marked bonding point (9) between the frame device (4) and the arm (6), the support surface having a rearwardly decreasing radius of curvature.

Chair according to one of Claims 1 to 3, characterized in that the abutment surface (10) of the frame device (4) has an obliquely backward and upwardly curved extension with the backrest (2) in the upright position.

Chair according to one of Claims 1 to 4, characterized in that the seat (3) is supported in its rear region by the frame device (4) so as to be pivotable about an axis (II) which is located at a considerable distance below the seat surface of the seat. .

Chair according to one of Claims 1 to 5, characterized in that the seat (3) is pivotally supported at opposite sides in its rear area.

Chair according to one of Claims 1 to 6, characterized in that the seat (3) has two abutment surfaces (12) separated in the transverse direction of the chair, which rest against their respective supporting surfaces (13) on said first end portion (7). ) of the arm or was its arm (6).

A chair according to any one of claims 1-7, characterized in that the frame device (4) has two abutment surfaces (10) separated in the transverse direction of the chair, which rest against each of the support projections (5) supported by the base (1).

Chair according to one of Claims 1 to 8, characterized in that the support projection resp. each support projection (5) consists of a rotatably mounted support roller.