EP0309368B1 - Ergonomischer Stuhl - Google Patents
Ergonomischer Stuhl Download PDFInfo
- Publication number
- EP0309368B1 EP0309368B1 EP88440069A EP88440069A EP0309368B1 EP 0309368 B1 EP0309368 B1 EP 0309368B1 EP 88440069 A EP88440069 A EP 88440069A EP 88440069 A EP88440069 A EP 88440069A EP 0309368 B1 EP0309368 B1 EP 0309368B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- seat
- backrest
- plate
- chair according
- chair
- 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.)
- Expired - Lifetime
Links
Images
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
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- 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 or pivotally mounted in a rigid base frame
- A47C3/026—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame with central column, e.g. rocking office chairs; Tilting chairs
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- 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
-
- 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
- the present invention relates to a new ergonomic chair, usable in particular as an office chair with exceptional characteristics of comfort and adaptability to the shape and positions of its occupant.
- this armchair relate in particular to the constitution of the seat-back set and more particularly the combination of means making this set comfortable and permanently adaptable to the occupant in any position. It is understood that this assembly is itself mounted on a base which, in known manner may preferably include height adjustment means, but this base will not be described here, and is not part of the invention.
- the essential characteristic of the armchairs according to the present invention is to include a seat-back assembly in one piece whose flexibility with respect to the fixed base results from the combination of mechanical means and the properties of the material used for its construction.
- an anterior portion of the seat being fixedly mounted on the base, the assembly of the posterior portion of the seat and the backrest constitutes a single molded part, pivotally mounted on this anterior portion and comprising mechanical means ensuring the elastic tilting of this part, the portion of this part constituting the file having at the desired height as a function of the comfort of the seat a structure ensuring its controlled and limited deformation towards the rear.
- a seat comprising a single molded part, mounted tilting with respect to the front portion of the seat, around a flexible zone and the backrest of which also has a flexible zone.
- the aim is to maintain the back at the level of the lumbar vertebrae, at a constantly optimal angle, whatever the inclination of the seat, thanks to a constant modification of the inclination of the back under the effect of a very complicated linkage, which exerts a traction towards the rear of the whole of the backrest, according to the inclination of the whole of the seat.
- WO-A-8704909 is described a seat in which a single molded part is mounted on an elastic metal frame, the front portion of the seat being fixed while its rear portion constitutes the only connection with the backrest, mechanical means, formed by the elbows of a metal frame which should allow elastic tilting of this rear portion.
- said metal frame in fact only provides a certain suspension effect and not a real tilting with the feeling of comfort which would result therefrom.
- the present invention relates to a seat of this general type but in which a much simpler construction provides much greater comfort.
- the seat-back assembly thus constituting a single molded part, equipped with elastic tilting means which have just been described, the invention aims to combine, with these mechanical means, a back structure which allows the upper portion of this file to bend elastically backwards preferably at the height of the occupant's shoulders under the pressure of the body of this occupant.
- a back structure is preferably of the type described in EP-0309369, patent filed jointly with the present application for "semi-rigid structure with controlled ability to unidirectional deformation, usable in particular in the construction of seats.
- Such a structure comes by molding of said single molded part, and is present, in the zone concerned by the backrest, in the form of horizontal ribs, the portion located towards the back of the seat is thick. and rigid while the forward portion of the seat is thinned and rounded, in such a way that, seen from the rear, this area of the backrest appears to include a series of very narrow gutters which can be crushed under the pressure of occupant, allowing a slight and limited flexion from the top of the backrest to the rear.
- this configuration offers an additional advantage, allowing this seat to include another characteristic falling within the scope of the invention.
- the metal structure with which the molded elements forming the seat and the back are associated is generally mounted in the axis of the seat.
- this structure is transferred to the ribs, and is in the form of a bowl made of metal tubes, the substantially horizontal portion of which corresponds at the seat is located under the corresponding part of said molded part, while the substantially vertical portion reinforcing the backrest until the bending zone is located in front of the corresponding part of the molded part, these tubes therefore passing through this molded part in the connection area between the seat and the backrest.
- the armrests can thus easily be attached to this bowl.
- the front portion of the "seat" part of the molded part described above is also associated with a shoe allowing it to slide back and forth relative to the casing containing the aforementioned mechanical means intended for its elastic tilting. This results in a displacement relative to the pivot axis around which this tilting occurs, this displacement operating itself according to the configuration and the weight of the user.
- the seat according to the invention resting on a fixed base with adjustable height generally designated by 10, has the fundamental characteristic of comprising a single seat-back assembly in a single molded part, designated by the global reference 11, whose displacements and deformations caused relative to the base 10 by the configuration and the positions of the occupant result from the combination of mechanical means, designated by the global reference 12 and the properties of 'a structure molded with the part 11 and designated by the global reference 13.
- the single molded part 11 comprises a substantially horizontal portion 14, constituting the largest part of the seat cushion, and a substantially vertical portion 15, constituting as a whole the seat back.
- the portion 14 is pivotally mounted about a horizontal axis 16, mounted at the rear of a fixed seat portion 17, integral with the base 10, and covering a casing 18, which encloses the part retaining mechanism 11 and in which is mounted the cylinder 19 allowing the height adjustment of the seat.
- This portion 14 is rigidly secured to the portion 15, and the rearward flexing ability of the upper zone of the portion 15 is ensured by the structure 13.
- FIGS. 2 to 4 there is shown the detail of the mechanism 12.
- This mechanism consists of a support plate 20, permanently compressing the free ends 22 of two springs 21a and 21b, the other ends 23 of which are hooked to the front of the casing 18.
- This plate 20 is integral in rotation with the pivoting axis 16, so that the tilting of the part 11 takes place in elastic opposition to the springs 21.
- Means for adjusting the spring retaining force 21 are provided in the form of a screw 24, operated by a button 25, accessible by the occupant outside the casing 18.
- This screw cooperates with a threaded housing of a bar 26 joining the ends 22 of the springs 21, so that its rotation determines the modification of the height of the point of application of the springs on the plate 20, and as a result of the force to be applied to these springs to tilt the Exhibit 11.
- this point is situated towards the bottom of the plate 20, while in FIG. 2b, it is situated at the very top of the said plate, which makes the necessary effort, therefore the hardness of the mechanism, much higher.
- a mechanism for locking the mechanism is also provided, in the form of a push rod 26, pivotally mounted on the axis 23 at its front end; and whose rear end 27 can immobilize the plate 20 against any forward movement.
- the occupant has a lever 28 pivoting at 28 'acting by a finger 30 carried by an axis 29 on the height of inclination of the pusher 26.
- a notched guide 31 defines a certain number of positions of the finger 30 , that is to say of possible limits to the degree of inclination of the plate 20, therefore of the part 11.
- this structure which comes from molding with the whole part 11, preferably made of polypropylene, consists of rigid blocks 5, spaced from one another by ribs 6 and joined by gutters 7, made of thinner and / or more flexible material, which constitute the only deformable portions of the structure.
- each gutter being small, when a force is exerted on the structure in the direction F, the overall direction of the structure will pass from ZZ 'to ZZ' ', the angle Z' Z Z '' being small , and according to the number of gutters.
- ribs 8 in the interior of the gutters, or some of them are provided according to the invention. The control of the deformation of the structure therefore depends on two factors, which can be provided on request, namely the number of gutters 7 and the number of ribs 8.
- the structure is deformable only in the direction F, and it is practically undeformable in the opposite direction.
- This structure is original in itself, and is the subject of EP-0309369 mentioned above. Its combination with the mechanism illustrated in previous figures 2 to 4 is also original and it is this which constitutes the subject of the present application.
- the upper part 15a of the backrest 15 can bend slightly and limited with respect to the lower part 15b, which ensures optimum comfort for the occupant.
- this configuration of the single part 11 makes it possible to associate this part, or shell, 11, with a cradle or bowl in metal tube designated by the general reference 40 , and located entirely on the periphery of said shell.
- this bowl comprises two horizontal tubes, namely the lower tube 41, which fits on the pivoting bar 16, and the upper tube 32, on which the lowest rib of the structure 13 hangs; it also comprises two bent side tubes 33a and 33b, the substantially horizontal portion of which is located under the seat 14, and the substantially vertical portion is located in front of the backrest 15, these lateral tubes therefore passing through the part 11 at 34a and 34b ( see figure 1 ').
- This configuration of said bowl is also original and forms part of the invention. It is also thanks to this configuration that all the controls of this seat (button 25 - lever 28 - and dependent organs) can be housed in the casing 18, that is to say in the fixed part.
- the different parts of the shell 11 are curved, as has been partially shown in Figure 1, and are intended in any case to be covered by the usual upholstery for this kind of seat.
- the front seat area 17, instead of being fixed on the front portion of the casing 18, resting on the pivot axis 16, includes means allowing it to slide back and forth back on that portion.
- These means consist of an intermediate piece 34 integral with the portion 17 and forming two lateral pads 35 (see FIG. 8), sliding on the lateral edges 36 of the casing 18.
- the portion 17 is therefore movable from front to rear relative to the casing 18, and, consequently, relative to the axis 16, so that the tilting of the whole of the seat 14 takes place more or less at front or rear of the base 10, depending on the configuration of the weight of the user, who thus finds a third element of comfort.
- the variant of FIGS. 7 and 8 still has an additional difference: while in the embodiment of FIG. 1, the connection between the front horizontal portion 17 and the rear horizontal portion 14 was on the axis 16, on the contrary, in the variant of FIG. 7, this connection is made at a certain vertical distance from the axis 16, which allows a certain flexibility in this connection , and consequently eliminates the "bar effect", detrimental to the comfort of the seat, which thus finds a fourth element of comfort by adapting to the co-training of the user.
Landscapes
- Chairs Characterized By Structure (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
- Mattresses And Other Support Structures For Chairs And Beds (AREA)
- Seats For Vehicles (AREA)
- Fluid-Driven Valves (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Claims (9)
- Ergonomischer Stuhl eines Typs, der umfaßt:- einen Sitz mit einem vorderen Bereich (17) und einem hinteren Bereich (14) und einer horizontalen Schwenkachse, die an einem höhenverstellbaren Gestell (10) angebracht sind,- eine einteilige Rückenlehne (13), die auf einer bestimmten Höhe eine Struktur besitzt, die ihre kontrollierte Verformung nach hinten ermöglicht, wobei diese Struktur durch mechanische Mittel (12) und gleichzeitig durch die Eigenschaften des Materials (13) eine Gesamtflexibilität besitzt,- wobei der vordere Teil (17) des Sitzes am Gestell angebracht ist und wobei der hintere Teil (14) einteilig mit der Rückenlehne (13) gegossen und am vorderen Teil schwenkbar angebracht ist,dadurch gekennzeichnet, daß:- die mechanischen Mittel, die die elastische Kippung der Rückenlehne ermöglichen, umfassen: eine Platte (20), die an der Schwenkachse (16) des Sitzes schwenkbar angebracht ist, eine Feder (21), die mit dieser Platte so zusammengefügt ist, daß bei einer Kippung des Stuhls nach hinten die Platte unter einer Komprimierung der Feder schwenkt und dabei im Sitz eine Steifigkeit erzeugt, die der von der Platte ausgeübten Kraft entgegenwirkt,- eine Einstellschraube (24), die die Einstellung der Steifigkeit ermöglicht,- und einen Läufer (26), der an der Feder befestigt ist und ein Innengewinde aufweist, wobei die Einstellschraube mit dem Innengewinde so zusammenwirkt, daß bei einer Drehung der Schraube durch den Benutzer der Läufer verschoben wird und dabei den Punkt der Platte ändert, auf den die Feder ihre Kraft ausübt.
- Stuhl gemäß Anspruch 1, dadurch gekennzeichnet, daß er ein Mittel für die Verriegelung des gegossenen Teils in jeder Kipposition aufweist.
- Stuhl gemäß Anspruch 2, dadurch gekennzeichnet, daß das Verriegelungsmittel eine Pleuel-Schubstange (26') ist, die durch einen äußeren Hebel betätigt wird, um an der Platte in Anschlag zu gelangen.
- Stuhl gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß er in Verbindung mit den mechanischen Mitteln eine Rückenlehnenstruktur aufweist, die unter dem Druck des Körpers einer sitzenden Person zuläßt, daß sich der obere Bereich dieser Rückenlehne vorzugsweise auf Höhe der Schultern diese sitzenden Person elastisch nach hinten durchbiegt.
- Stuhl gemäß Anspruch 4, dadurch gekennzeichnet, daß die Struktur im Bereich der Rückenlehne in Form von horizontalen Rippen (5) gegeben ist, deren zur Rückseite des Stuhls gewandter Anteil dick und steif ist, während der zur Vorderseite des Stuhls gewandte Anteil (7) verjüngt und abgerundet ist, derart, daß von hinten gesehen dieser Bereich der Rückenlehne eine Reihe von sehr schmalen Rinnen aufzuweisen scheint, die dazu geeignet sind, unter dem Druck der sitzenden Person zusammengedrückt zu werden und dabei eine leichte und begrenzte Biegung des Oberteils der Rückenlehne nach hinten zulassen.
- Stuhl gemäß den Ansprüchen 4 und 5, dadurch gekennzeichnet, daß im Inneren der Rinnen vorgesehene Anschläge (8) die Amplitude diese Biegung zu begrenzen erlauben.
- Stuhl gemäß einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das einzige gegossene Teil mit einer metallischen Struktur verbunden ist, die die Form einer aus Metallrohren (33-34) verwirklichten Mulde aufweist, deren dem Sitz entsprechender im wesentlichen horizontaler Bereich sich unter dem entsprechenden Bereich des gegossenen Teils befindet, während der die Rückenlehne bis zum Biegungsbereich verstärkende im wesentlichen vertikale Bereich sich vor dem dem gegossenen Teil entsprechenden Bereich befindet, so daß diese Rohre durch das gegossene Teil im Verbindungsbereich zwischen dem Sitz und der Rückenlehne verlaufen.
- Stuhl gemäß Anspruch 7, dadurch gekennzeichnet, daß er Armlehnen umfaßt, die an der metallischen Struktur befestigt sind.
- Stuhl gemäß einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das einzige gegossene Teil aus Polypropylen ist.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT88440069T ATE86450T1 (de) | 1987-09-22 | 1988-08-30 | Ergonomischer stuhl. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8713248A FR2620607B1 (fr) | 1987-09-22 | 1987-09-22 | Siege ergonomique |
FR8713248 | 1987-09-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0309368A1 EP0309368A1 (de) | 1989-03-29 |
EP0309368B1 true EP0309368B1 (de) | 1993-03-10 |
Family
ID=9355204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88440069A Expired - Lifetime EP0309368B1 (de) | 1987-09-22 | 1988-08-30 | Ergonomischer Stuhl |
Country Status (7)
Country | Link |
---|---|
US (1) | US4981326A (de) |
EP (1) | EP0309368B1 (de) |
AT (1) | ATE86450T1 (de) |
CA (1) | CA1285468C (de) |
DE (1) | DE3879062T2 (de) |
ES (1) | ES2039685T3 (de) |
FR (1) | FR2620607B1 (de) |
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IT202100014576A1 (it) * | 2021-06-04 | 2022-12-04 | Pro Cord Spa | Sedia con schienale flessibile |
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EP0202390A1 (de) * | 1985-05-23 | 1986-11-26 | VOKO Franz Vogt & Co. KG | Sitzmöbel |
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US3741607A (en) * | 1970-10-05 | 1973-06-26 | H Cramer | Chair |
CH591226A5 (en) * | 1975-09-05 | 1977-09-15 | Giroflex Entwicklungs Ag | Chair with pivoting backrest support arm - whose pivot axis is located in front of seat section support tube |
DE2817121C2 (de) * | 1978-04-19 | 1985-10-10 | Siemens AG, 1000 Berlin und 8000 München | Gefahrenmeldeanlage |
US4533177A (en) * | 1979-06-06 | 1985-08-06 | Knoll International, Inc. | Reclining chair |
NL8103037A (nl) * | 1981-06-23 | 1983-01-17 | Gispen & Staalmeubel Bv | Stoel. |
DE3604534A1 (de) * | 1986-02-13 | 1987-08-20 | Hartmut Lohmeyer | Sitzmoebel mit einem sitz und einer in sich elastisch nachgebenden rueckenlehne |
US5050931A (en) * | 1986-04-10 | 1991-09-24 | Steelcase Inc. | Controlled deflection front lip for seating |
-
1987
- 1987-09-22 FR FR8713248A patent/FR2620607B1/fr not_active Expired - Lifetime
-
1988
- 1988-08-30 EP EP88440069A patent/EP0309368B1/de not_active Expired - Lifetime
- 1988-08-30 DE DE8888440069T patent/DE3879062T2/de not_active Expired - Fee Related
- 1988-08-30 AT AT88440069T patent/ATE86450T1/de not_active IP Right Cessation
- 1988-08-30 ES ES198888440069T patent/ES2039685T3/es not_active Expired - Lifetime
- 1988-09-15 CA CA000577465A patent/CA1285468C/fr not_active Expired - Fee Related
- 1988-09-19 US US07/246,458 patent/US4981326A/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0202390A1 (de) * | 1985-05-23 | 1986-11-26 | VOKO Franz Vogt & Co. KG | Sitzmöbel |
Also Published As
Publication number | Publication date |
---|---|
EP0309368A1 (de) | 1989-03-29 |
ATE86450T1 (de) | 1993-03-15 |
DE3879062D1 (de) | 1993-04-15 |
FR2620607B1 (fr) | 1991-03-15 |
US4981326A (en) | 1991-01-01 |
ES2039685T3 (es) | 1993-10-01 |
DE3879062T2 (de) | 1993-08-26 |
FR2620607A1 (fr) | 1989-03-24 |
CA1285468C (fr) | 1991-07-02 |
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