EP0332088B1 - Chair, particularly a work and office chair - Google Patents

Chair, particularly a work and office chair Download PDF

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Publication number
EP0332088B1
EP0332088B1 EP89103808A EP89103808A EP0332088B1 EP 0332088 B1 EP0332088 B1 EP 0332088B1 EP 89103808 A EP89103808 A EP 89103808A EP 89103808 A EP89103808 A EP 89103808A EP 0332088 B1 EP0332088 B1 EP 0332088B1
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EP
European Patent Office
Prior art keywords
seat
backrest
chair
carrier
links
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
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EP89103808A
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German (de)
French (fr)
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EP0332088A1 (en
Inventor
Günter Kratz
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Haworth Buroeinrichtungen GmbH
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R O E D E R GmbH
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Priority to AT89103808T priority Critical patent/ATE66791T1/en
Publication of EP0332088A1 publication Critical patent/EP0332088A1/en
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Publication of EP0332088B1 publication Critical patent/EP0332088B1/en
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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
    • 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 invention relates to a chair, in particular a work or office chair, with a seat support with a seat which can be pivoted in the front region about a horizontal pivot axis and whose inclination can be changed, and a backrest support with a backrest which can be changed in proportion to the inclination of the seat support, with which, with increasing inclination of the seat carrier, the backrest executes an additional relative movement downwards relative to the facing end of the seat carrier.
  • the known chairs of this type offer excellent seating comfort, since on the one hand they provide clear support for the back of the user in the starting or working position thanks to the practically vertical position of the backrest, but on the other hand they allow relaxed sitting after the backrest bar has been tilted backwards.
  • the backrest bar When the backrest bar is tilted backwards, the upper body of the user does not simply make a swiveling movement, but rather a movement superimposed from various movement components results. Since the backrest performs an additional downward movement towards the seat when the backrest bar is tilted backwards, a relative movement between the back of the user and the backrest is avoided or at least reduced to an undetectable value.
  • the chair can be designed as a synchronous chair, in which a downward inclination of the seat support carrying the seat inevitably brings about a backward inclination of the backrest bar with a larger angle of inclination.
  • the seat support with the seat can also be guided to be extendable on the bearing block.
  • multi-link lever chains are used, as shown in EP 0176816 A1, or, on the other hand, pairs of transmission levers and drive arches as shown in EP 0085870 A1.
  • many parts are required for the adjustment device.
  • a chair according to DE 2916897 A1 in which, when the seat is pulled out, the backrest on the backrest bar is displaced in the direction of the seat.
  • the backrest support is articulated on at least one handlebar, which itself is close to the pivot axis of the seat support is rotatably mounted on the chair frame that the handlebar carries a driver between the articulation axis of the backrest support and the axis of rotation on the chair frame, which is adjustably guided in a guide slot of the seat support, and that the backrest support is preferably articulated on both sides above its articulation axis with a pivot lever is, which is also pivotally mounted on the chair frame in the region of the pivot axis of the seat support.
  • the adjustment device only one link and two pivot levers are required as a minimum.
  • the handlebar takes over the lowering of the backrest support relative to the facing end of the seat support with the seat, while the swivel lever takes over the disproportionate change in the inclination of the backrest support with the backrest as soon as the inclination of the seat support changes with the seat in one direction or the other.
  • the seat support and the seat can be produced as a solid, compact unit. Then only the handlebars and the swivel levers need to be attached and the connection to the chair frame made.
  • a non-tiltable articulation of the backrest support with the backrest is achieved according to one embodiment in that a pair of links is provided, which are integrally connected to one another in the central region of the width and to the backrest support in an articulated manner, that the chair frame has a horizontal bearing sleeve that has the pivot axis of the seat carrier and a return spring that two bearing brackets are formed on the bearing sleeve, on which the handlebars are rotatably mounted, and that two brackets with slot slots designed as elongated holes are attached to the seat bracket, in which carriers designed as bolts are adjustably guided.
  • the pivot bearing of the seat support is solved according to one embodiment so that two bearing brackets are attached to the seat support, which are inserted through circumferential slots in the bearing sleeve and connected in a rotationally fixed manner to the pivot axis which is rotatably mounted in the bearing sleeve and is under the tension of the return spring. It is advantageously provided that the bearing sleeve is connected in the end regions by means of two V-shaped support arms with an approximately centrally arranged column of the chair frame and that the column, the support arms and the bearing sleeve with the mounting brackets for the handlebars are made as a one-piece casting.
  • the adjustment of the handlebars by means of the seat support takes place in such a way that the drivers are arranged approximately in the middle of the depth of the seat support, that in the rear region of the seat support the lower end of the backrest support is articulated on the handlebars, and that the axis of rotation of the handlebars is arranged approximately in the middle between the pivot axis of the seat carrier and the drivers of the handlebars, the drivers and the axis of rotation in the initial position of the chair being approximately in a horizontal plane above the pivot axis of the seat carrier and this section of the handlebars being at a distance from the seat carrier.
  • the front area of the seat support and the seat are convexly curved downwards, this curvature in the starting position of the chair starting approximately above the pivot axis of the seat support and the seat, then the seat support with the seat becomes increasingly increasing in the front area Slightly lowered incline. It is also achieved with this adjustment device that the seat carrier moves with the seat slightly with increasing inclination towards the backrest, so that in the area of the user's knees no change in angle between the thigh and lower leg is required and the seating comfort regardless of the inclination of the seat and the backrest is preserved.
  • pivoting levers have angled end sections which are oriented approximately vertically in the starting position of the chair and are pivotably mounted on the pivot axis of the seat carrier and which are based on the change in inclination of the backrest carrier are coordinated.
  • the handlebars of the adjusting device can be used in a simple manner to determine the end positions of the seat support and thus also the backrest support, in that the sections of the handlebars between the drivers and the axis of rotation of the handlebars as stops limit the maximum inclination of the seat support and that the sections the handlebar between the drivers and the articulation axis of the backrest support as stops limit the return of the seat support with the seat to the starting position.
  • a particularly advantageous embodiment is characterized in that the pivoting levers are designed as armrests or carry armrests.
  • the centrally arranged column of the chair frame does not hinder the lowering of the seat support with the seat, it is provided that the two links are at a distance from each other which is greater than the assigned dimension of the column of the chair frame, and that the links are symmetrical to the column are arranged.
  • Shaped on the column 10 are two V-shaped support arms 11 and 12 which are directed towards the front of the chair and are connected at one end to the horizontal bearing sleeve 31 in one piece.
  • two bearing straps 14 and 20 formed as double straps are formed in the central region of the bearing sleeve 31 and are used for the rotatable mounting of two links 16 and 21, as the axis of rotation 15 shows.
  • the bearing brackets 14 and 20 protrude upwards and towards the rear of the chair from the bearing sleeve 31, so that the axis of rotation 15 lies above the pivot axis 13 which is rotatably supported in the bearing sleeve 31.
  • the bearing sleeve 31 also receives the return spring which holds the seat support 25 with the seat 26 in the starting position shown in FIG. 1. This starting position can be limited by stops in the bearing sleeve 31 or on the links 16 and 21.
  • the seat support 25 carries in the front area on the underside the two bearing brackets 27 and 29, which are inserted through circumferential slots 28 and 30 into the bearing sleeve 31 and rotatably with them the pivot axis 13 are connected.
  • the circumferential slots 28 and 30 allow the pivoting movement of the bearing brackets 27 and 29 between the starting position according to FIG. 1 and the lowered end position of the seat support 25 according to FIG. 3.
  • the links 16 and 21 are guided into the rear region of the seat support 25 and carry the articulation axis 17 for the lower end of the backrest support 18, on which the backrest 19 can be firmly attached and which, like the backrest 19, can be anatomically shaped.
  • the links 16 and 21 carry drivers 23, which can be designed as bolts.
  • the drivers 23 of both links 16 and 21 can also be formed by a single bolt.
  • the drivers 23 are guided in the middle region of the seat support 25 in approximately horizontal guide slots 24 of bearing brackets 22 so as to be adjustable.
  • the bearing brackets 22 are attached to the underside of the seat support 25.
  • the pivot axis 13 protrudes from both ends of the bearing sleeve 13 and serves as a pivot bearing for the two pivot levers 32 and 34, which are pivotally connected at their other ends by means of the pivot bearings 33 and 35 to the backrest support 18 via the pivot axis 17.
  • the end portions 36 and 37 of the pivot levers 32 and 34 facing the pivot axis 13 are angled such that they are oriented approximately vertically in the starting position of the chair. The length of these end sections 36 and 37 is adjusted so that when the bearings 33 and 35 move on the track 38, the inclination of the backrest support 18 increases or decreases disproportionately to the inclination of the seat support 25.
  • the seat 26 can be firmly connected to the seat support 25.
  • the pivot levers 32 and 34 can carry armrests or can even be designed as armrests.
  • the view according to FIG. 2 shows that the distance between the two links 16 and 21, which ensure that the backrest support 18 with the backrest 19 cannot be tilted, is somewhat larger than the dimension, for example the diameter, of the column 10.
  • the Handlebars 16 and 21 additionally arranged symmetrically to the column 10, then it does not hinder the lowering of the handlebars 16 and 21 into the area of the column 10.
  • the lowering can also be limited in that the sections of the links 16 and 21 carry 15 stops between the drivers 23 and the axis of rotation or serve as stops themselves.
  • the seat support 25 with the seat 26 is moved slightly in the direction of the backrest 19, as can be seen in FIG. 3.
  • the seat support 25 lowers slightly with the seat 26 in the front area.
  • the front edges of the seat support 25 and the seat 26 are rounded convexly downward, the rounding starting approximately above the pivot axis 13 when the chair is in the starting position according to FIG. 1 and the bearing plates 27 and 29 are preferably directed approximately vertically upwards.
  • the additional adjustment of the seat support 25 with the seat 26 in the direction of the backrest 19 in connection with the lowering of the seat support 25 with the seat 26 in the front region has the advantage that the angle between the thigh and lower leg of the user from the change in inclination of the seat support 25 the seat 26 remains and thus the seating comfort is maintained in every position of the chair.

Abstract

The work or office chair has a seat support (25), which is swivellable about a horizontal swivel axis in the front region and is adjustable in inclination, with a seat (26) and has a backrest support (18), which is inevitably overproportionally adjustable in inclination in dependence on the change in inclination of the seat support (25), with a backrest (19). With increasing inclination of the seat support (25), the backrest (19) executes an additional relative movement downwards in relation to the facing end of the seat support (25). A chair with overproportional synchronous adjustment of seat and backrest and additional adjustment of the backrest in relation to the seat in the case of change in its inclination is achieved with a simple, operationally reliable adjusting device in that the backrest support (18) is attached (16, 21) at least to one connecting rod which itself is mounted rotatably on the chair frame near to the swivel axis (13) of the seat support (25), in that the connecting rod (16, 21) bears a carrier (23) on the chair frame between the attachment axis (17) of the backrest support (18) and the axis of rotation (15), which carrier is guided adjustably in a guide slot (24) of the seat support (25), and in that the backrest support (18) is preferably connected in an articulated manner on both sides via its attachment axis (17) to a swivel lever (32, 34) in each case, which is mounted swivellably likewise on the chair frame in the region of the swivel axis (13) of the seat support (25).

Description

Die Erfindung betrifft einen Stuhl, insbesondere Arbeits- oder Bürostuhl, mit einem im vorderen Bereich um eine horizontale Schwenkachse schwenkbaren und in der Neigung veränderbaren Sitzträger mit Sitz und einem in Abhängigkeit von der Neigungsänderung des Sitzträgers zwangsweise in der Neigung überproportional veränderbaren Rückenlehnenträger mit Rückenlehne, bei dem mit zunehmender Neigung des Sitzträgers die Rückenlehne gegenüber dem zugekehrten Ende des Sitzträgers eine zusätzliche Relativbewegung nach unten ausführt.The invention relates to a chair, in particular a work or office chair, with a seat support with a seat which can be pivoted in the front region about a horizontal pivot axis and whose inclination can be changed, and a backrest support with a backrest which can be changed in proportion to the inclination of the seat support, with which, with increasing inclination of the seat carrier, the backrest executes an additional relative movement downwards relative to the facing end of the seat carrier.

Die bekannten Stühle dieser Art bieten einen ausgezeichneten Sitzkomfort, da sie einerseits in der Ausgangs- oder Arbeitsstellung dank der praktisch senkrechten Stellung der Rückenlehne ein eindeutiges Abstützen des Rückens des Benützers erbringen, andererseits aber nach dem Rückwärtsneigen des Rückenlehnenstabes ein entspanntes Sitzen ermöglichen. Beim Rückwärtsneigen des Rückenlehnenstabes macht der Oberkörper des Benützers nicht einfach eine Schwenkbewegung, sondern es ergibt sich eine aus verschiedenen Bewegungskomponenten überlagerte Bewegung. Da die Rückenlehne beim Rückwärtsneigen des Rückenlehnenstabes eine zusätzliche Abwärtsbewegung in Richtung zum Sitz ausführt, wird eine Relativbewegung zwischen dem Rücken des Benützers und der Rückenlehne vermieden oder zumindest auf einen nicht mehr bemerkbaren Wert reduziert.The known chairs of this type offer excellent seating comfort, since on the one hand they provide clear support for the back of the user in the starting or working position thanks to the practically vertical position of the backrest, but on the other hand they allow relaxed sitting after the backrest bar has been tilted backwards. When the backrest bar is tilted backwards, the upper body of the user does not simply make a swiveling movement, but rather a movement superimposed from various movement components results. Since the backrest performs an additional downward movement towards the seat when the backrest bar is tilted backwards, a relative movement between the back of the user and the backrest is avoided or at least reduced to an undetectable value.

Wie die EP 0085670 A1, die EP 0176816 A1 und die DE 2916897 A1 zeigen, kann diese Kompensation der Relativbewegung zwischen dem Körper des Benützers und der Rückenlehne an verschiedenartigen Stühlen auf konstruktiv unterschiedliche Arten gelöst werden. Der Stuhl kann als Synchronstuhl ausgebildet sein, bei dem ein Abwärtsneigen des den Sitz tragenden Sitzträgers zwangsweise ein Rückwärtsneigen des Rückenlehnenstabes mit größerem Neigungswinkel bewirkt. Der Sitzträger mit dem Sitz kann auch an dem Lagerbock ausziehbar geführt sein. Wie diese bekannten Stühle zeigen, ist zur Kompensation der Relativbewegung zwischen dem Körper des Benützers und der Rückenlehne, die beim Verändern der Neigung des Rückenlehnenstabes auftritt, stets eine aufwendige und komplizierte Verstelleinrichtung erforderlich, die nicht immer störungsfrei und betriebssicher arbeitet.As EP 0085670 A1, EP 0176816 A1 and DE 2916897 A1 show, this compensation of the relative movement between the body of the user and the backrest can different chairs can be solved in different ways. The chair can be designed as a synchronous chair, in which a downward inclination of the seat support carrying the seat inevitably brings about a backward inclination of the backrest bar with a larger angle of inclination. The seat support with the seat can also be guided to be extendable on the bearing block. As these known chairs show, to compensate for the relative movement between the body of the user and the backrest, which occurs when changing the inclination of the backrest bar, a complex and complex adjustment device is always required, which does not always work properly and reliably.

Dabei sind zum einen mehrgliedrige Hebelketten eingesetzt, wie die EP 0176816 A1 zeigt, oder zum anderen übersetzungshebelpaare und Mitnehmerbögen wie die EP 0085870 A1 zeigt. In jedem Falle sind viele Teile für die Verstelleinrichtung erforderlich. Dasselbe gilt auch für einen Stuhl nach der DE 2916897 A1, bei der mit dem Herausziehen des Sitzes die Rückenlehne am Rückenlehnenstab in Richtung zum Sitz hin verschoben wird.On the one hand, multi-link lever chains are used, as shown in EP 0176816 A1, or, on the other hand, pairs of transmission levers and drive arches as shown in EP 0085870 A1. In any case, many parts are required for the adjustment device. The same also applies to a chair according to DE 2916897 A1, in which, when the seat is pulled out, the backrest on the backrest bar is displaced in the direction of the seat.

Es ist Aufgabe der Erfindung, einen Stuhl der eingangs erwähnten Art zu schaffen, bei dem zum Ausgleich der Relativbewegung zwischen dem Körper des Benützers und der Rückenlehne beim Rückwärtsneigen des Rückenlehnenträgers mit der Rückenlehne nur eine einfache, betriebssichere Verstelleinrichtung mit minimalem Montage- und Teileaufwand benötigt wird, der Sitz fest mit dem Sitzträger und die Rückenlehne fest mit dem Rückenlehnenträger verbunden werden können.It is an object of the invention to provide a chair of the type mentioned in which only a simple, reliable adjustment device with minimal assembly and parts expenditure is required to compensate for the relative movement between the body of the user and the backrest when the backrest support is tilted backwards with the backrest , the seat can be firmly connected to the seat support and the backrest can be firmly connected to the backrest support.

Diese Aufgabe wird nach der Erfindung dadurch gelöst, daß der Rückenlehnenträger mindestens an einem Lenker angelenkt ist, der selbst in der Nähe der Schwenkachse des Sitzträgers am Stuhlgestell drehbar gelagert ist, daß der Lenker zwischen der Anlenkachse des Rückenlehnenträgers und der Drehachse am Stuhlgestell einen Mitnehmer trägt, der in einem Führungsschlitz des Sitzträgers verstellbar geführt ist, und daß der Rückenlehnenträger vorzugsweise auf beiden Seiten über seiner Anlenkachse mit je einem Schwenkhebel gelenkig verbunden ist, der im Bereich der Schwenkachse des Sitzträgers ebenfalls am Stuhlgestell schwenkbar gelagert ist.This object is achieved according to the invention in that the backrest support is articulated on at least one handlebar, which itself is close to the pivot axis of the seat support is rotatably mounted on the chair frame that the handlebar carries a driver between the articulation axis of the backrest support and the axis of rotation on the chair frame, which is adjustably guided in a guide slot of the seat support, and that the backrest support is preferably articulated on both sides above its articulation axis with a pivot lever is, which is also pivotally mounted on the chair frame in the region of the pivot axis of the seat support.

Bei dieser Ausgestaltung der Verstelleinrichtung sind im Minimum nur ein Lenker und zwei Schwenkhebel erforderlich. Der Lenker übernimmt die Absenkung des Rückenlehnenträgers relativ zum zugekehrten Ende des Sitzträgers mit dem Sitz, während der Schwenkhebel die überproportionale Veränderung der Neigung des Rückenlehnenträgers mit der Rückenlehne übernimmt, sobald sich die Neigung des Sitzträgers mit dem Sitz in der einen oder anderen Schwenkrichtung verändert. Der Sitzträger und der Sitz kann wie der Rückenlehnenträger und die Rückenlehne als feste kompakte Einheit hergestellt werden. Es brauchen dann nur die Lenker und die Schwenkhebel angebracht und die Verbindung mit dem Stuhlgestell hergestellt zu werden.With this configuration of the adjustment device, only one link and two pivot levers are required as a minimum. The handlebar takes over the lowering of the backrest support relative to the facing end of the seat support with the seat, while the swivel lever takes over the disproportionate change in the inclination of the backrest support with the backrest as soon as the inclination of the seat support changes with the seat in one direction or the other. Like the backrest support and the backrest, the seat support and the seat can be produced as a solid, compact unit. Then only the handlebars and the swivel levers need to be attached and the connection to the chair frame made.

Eine unverkantbare Anlenkung des Rückenlehnenträgers mit der Rückenlehne wird nach einer Ausgestaltung dadurch erreicht, daß ein Paar von Lenkern vorgesehen ist, die im mittleren Bereich der Breite einstückig miteinander und mit dem Rückenlehnenträger gelenkig verbunden sind, daß das Stuhlgestell eine horizontale Lagerhülse aufweist, die die Schwenkachse des Sitzträgers und eine Rückstellfeder aufnimmt, daß an der Lagerhülse zwei Lagerlaschen angeformt sind, an denen die Lenker drehbar gelagert sind, und daß an den Sitzträger zwei Laschen mit als Langloch ausgebildeten Führungsschlitzen angebracht sind, in denen als Bolzen ausgebildete Mitnehmer verstellbar geführt sind.A non-tiltable articulation of the backrest support with the backrest is achieved according to one embodiment in that a pair of links is provided, which are integrally connected to one another in the central region of the width and to the backrest support in an articulated manner, that the chair frame has a horizontal bearing sleeve that has the pivot axis of the seat carrier and a return spring that two bearing brackets are formed on the bearing sleeve, on which the handlebars are rotatably mounted, and that two brackets with slot slots designed as elongated holes are attached to the seat bracket, in which carriers designed as bolts are adjustably guided.

Die Schwenklagerung des Sitzträgers ist nach einer Ausgestaltung so gelöst, daß am Sitzträger zwei Lagerlaschen angebracht sind, die durch Umfangsschlitze der Lagerhülse hindurch in diese eingeführt und drehfest mit der in der Lagerhülse drehbar gelagerten und unter der Spannung der Rückstellfeder stehenden Schwenkachse verbunden sind. Dabei ist vorteilhafterweise vorgesehen, daß die Lagerhülse in den Endbereichen mittels zwei V-förmig ausgerichteter Tragarme mit einer etwa mittig angeordneten Säule des Stuhlgestelles verbunden sind und daß die Säule, die Tragarme und die Lagerhülse mit den Lagerlaschen für die Lenker als einstückiges Gußteil hergestellt sind.The pivot bearing of the seat support is solved according to one embodiment so that two bearing brackets are attached to the seat support, which are inserted through circumferential slots in the bearing sleeve and connected in a rotationally fixed manner to the pivot axis which is rotatably mounted in the bearing sleeve and is under the tension of the return spring. It is advantageously provided that the bearing sleeve is connected in the end regions by means of two V-shaped support arms with an approximately centrally arranged column of the chair frame and that the column, the support arms and the bearing sleeve with the mounting brackets for the handlebars are made as a one-piece casting.

Die Verstellung der Lenker mittels des Sitzträgers erfolgt nach einer Ausgestaltung so, daß die Mitnehmer etwa in der Mitte der Tiefe des Sitzträgers angeordnet sind, daß im hinteren Bereich des Sitzträgers das untere Ende des Rückenlehnenträgers an den Lenkern angelenkt ist, und daß die Drehachse der Lenker etwa in der Mitte zwischen der Schwenkachse des Sitzträgers und den Mitnehmern der Lenker angeordnet ist, wobei die Mitnehmer und die Drehachse in der Ausgangsstellung des Stuhles etwa in einer horizontalen Ebene über der Schwenkachse des Sitzträgers liegen und dieser Abschnitt der Lenker im Abstand zum Sitzträger steht.The adjustment of the handlebars by means of the seat support takes place in such a way that the drivers are arranged approximately in the middle of the depth of the seat support, that in the rear region of the seat support the lower end of the backrest support is articulated on the handlebars, and that the axis of rotation of the handlebars is arranged approximately in the middle between the pivot axis of the seat carrier and the drivers of the handlebars, the drivers and the axis of rotation in the initial position of the chair being approximately in a horizontal plane above the pivot axis of the seat carrier and this section of the handlebars being at a distance from the seat carrier.

Ist weiterhin vorgesehen, daß der vordere Bereich des Sitzträgers und des Sitzes konvex nach unten gewölbt sind, wobei diese Wölbung in der Ausgangsstellung des Stuhles etwa über der Schwenkachse des Sitzträgers und des Sitzes beginnt, dann wird im vorderen Bereich der Sitzträger mit dem Sitz bei zunehmender Neigung leicht abgesenkt. Außerdem wird mit dieser Verstelleinrichtung erreicht, daß sich der Sitzträger mit dem Sitz bei zunehmender Neigung geringfügig in Richtung zur Rückenlehne verschiebt, so daß in dem Bereich der Kniekehlen des Benützers keine Winkeländerung zwischen Oberschenkel und Unterschenkel erforderlich wird und der Sitzkomfort unabhängig von der Neigung des Sitzes und der Rückenlehne erhalten bleibt.It is further provided that the front area of the seat support and the seat are convexly curved downwards, this curvature in the starting position of the chair starting approximately above the pivot axis of the seat support and the seat, then the seat support with the seat becomes increasingly increasing in the front area Slightly lowered incline. It is also achieved with this adjustment device that the seat carrier moves with the seat slightly with increasing inclination towards the backrest, so that in the area of the user's knees no change in angle between the thigh and lower leg is required and the seating comfort regardless of the inclination of the seat and the backrest is preserved.

Damit die überproportionale Änderung der Neigung des Rückenlehnenkörpers mit der Rückenlehne erreicht wird, sieht eine Ausgestaltung vor, daß die Schwenkhebel abgewinkelte Endabschnitte aufweisen, die in der Ausgangsstellung des Stuhles etwa vertikal ausgerichtet und auf der Schwenkachse des Sitzträgers schwenkbar gelagert und die auf die Neigungsänderung des Rückenlehnenträgers abgestimmt sind.In order for the disproportionate change in the inclination of the backrest body to be achieved with the backrest, one embodiment provides that the pivoting levers have angled end sections which are oriented approximately vertically in the starting position of the chair and are pivotably mounted on the pivot axis of the seat carrier and which are based on the change in inclination of the backrest carrier are coordinated.

Die Lenker der Verstelleinrichtung lassen sich auf einfache Weise dadurch zur Festlegung der Endstellungen des Sitzträgers und damit auch des Rückenlehnenträgers ausnützen, daß die Abschnitte der Lenker zwischen den Mitnehmern und der Drehachse der Lenker als Anschläge die maximale Neigung des Sitzträgers mit Sitz begrenzen und daß die Abschnitte der Lenker zwischen den Mitnehmern und der Anlenkachse des Rückenlehnenträgers als Anschläge die Rückstellung des Sitzträgers mit Sitz in die Ausgangsstellung begrenzen.The handlebars of the adjusting device can be used in a simple manner to determine the end positions of the seat support and thus also the backrest support, in that the sections of the handlebars between the drivers and the axis of rotation of the handlebars as stops limit the maximum inclination of the seat support and that the sections the handlebar between the drivers and the articulation axis of the backrest support as stops limit the return of the seat support with the seat to the starting position.

Eine besonders vorteilhafte Ausgestaltung ist dadurch gekennzeichnet, daß die Schwenkhebel als Armlehnen ausgebildet sind oder Armlehnen tragen.A particularly advantageous embodiment is characterized in that the pivoting levers are designed as armrests or carry armrests.

Damit die mittig angeordnete Säule des Stuhlgestelles die Absenkung des Sitzträgers mit dem Sitz nicht behindert, ist vorgesehen, daß die beiden Lenker in einem Abstand zueinander stehen, der größer ist als die zugeordnete Abmessung der Säule des Stuhlgestelles, und daß die Lenker symmetrisch zu der Säule angeordnet sind.So that the centrally arranged column of the chair frame does not hinder the lowering of the seat support with the seat, it is provided that the two links are at a distance from each other which is greater than the assigned dimension of the column of the chair frame, and that the links are symmetrical to the column are arranged.

Die Erfindung wird anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert. Es zeigt:

  • Fig. 1 den in der Ausgangsstellung befindlichen Stuhl mit der Verstelleinrichtung in Seitenansicht,
  • Fig. 2 eine Vorderansicht des Stuhles nach Fig. 1, wobei der Sitzträger mit dem Sitz weggelassen ist, und
  • Fig. 3 den Stuhl nach Fig. 1 mit abgesenktem Sitzträger mit Sitz und nach hinten geneigtem Rückenlehnenträger mit Rückenlehne.
The invention is explained in more detail using an exemplary embodiment shown in the drawings. It shows:
  • 1 shows the chair in the starting position with the adjusting device in side view,
  • Fig. 2 is a front view of the chair of Fig. 1, with the seat support with the seat omitted, and
  • Fig. 3 shows the chair of FIG. 1 with the seat support lowered and the backrest inclined backwards with the backrest.

Bei dem im Ausführungsbeispiel nach den Fig. 1 bis 3 ist vom Stuhlgestell nur der obere Teil der etwa mittig angeordneten Säulen 10 gezeigt. Die für die Höhenverstellung erforderlichen Teile des Stuhles sind dabei weggelassen, da sie für die vorliegende Erfindung nicht von Bedeutung sind.In the exemplary embodiment according to FIGS. 1 to 3, only the upper part of the approximately centrally arranged columns 10 of the chair frame is shown. The parts of the chair required for the height adjustment are omitted since they are not important for the present invention.

Diese Teile können in an sich bekannter Weise ausgebildet sein. An der Säule 10 sind zwei V-förmig auseinanderstrebende und zur Vorderseite des Stuhles gerichtete Tragarme 11 und 12 angeformt, die an ihren Enden mit der horizontalen Lagerhülse 31 einstückig verbunden sind. Wie die Ansicht nach Fig. 2 erkennen läßt, sind im mittleren Bereich der Lagerhülse 31 zwei als Doppellaschen ausgebildete Lagerlaschen 14 und 20 angeformt, die zur drehbaren Lagerung von zwei Lenkern 16 und 21 verwendet werden, wie die Drehachse 15 zeigt. Die Lagerlaschen 14 und 20 stehen dabei nach oben und in Richtung zur Rückseite des Stuhles an der Lagerhülse 31 ab, so daß die Drehachse 15 über der Schwenkachse 13 liegt, die in der Lagerhülse 31 drehbar gelagert ist. Die Lagerhülse 31 nimmt auch die Rückstellfeder auf, die den Sitzträger 25 mit dem Sitz 26 in der in Fig. 1 dargestellten Ausgangsstellung hält. Diese Ausgangsstellung kann durch Anschläge in der Lagerhülse 31 oder auch an den Lenkern 16 und 21 begrenzt werden. Der Sitzträger 25 trägt im vorderen Bereich auf der Unterseite die beiden Lagerlaschen 27 und 29, die durch Umfangsschlitze 28 und 30 in die Lagerhülse 31 eingeführt und drehfest mit der Schwenkachse 13 verbunden sind. Die Umfangsschlitze 28 und 30 lassen die Schwenkbewegung der Lagerlaschen 27 und 29 zwischen der Ausgangsstellung nach Fig. 1 und der abgesenkten Endstellung des Sitzträgers 25 nach Fig. 3 zu.These parts can be designed in a manner known per se. Shaped on the column 10 are two V-shaped support arms 11 and 12 which are directed towards the front of the chair and are connected at one end to the horizontal bearing sleeve 31 in one piece. As can be seen from the view in FIG. 2, two bearing straps 14 and 20 formed as double straps are formed in the central region of the bearing sleeve 31 and are used for the rotatable mounting of two links 16 and 21, as the axis of rotation 15 shows. The bearing brackets 14 and 20 protrude upwards and towards the rear of the chair from the bearing sleeve 31, so that the axis of rotation 15 lies above the pivot axis 13 which is rotatably supported in the bearing sleeve 31. The bearing sleeve 31 also receives the return spring which holds the seat support 25 with the seat 26 in the starting position shown in FIG. 1. This starting position can be limited by stops in the bearing sleeve 31 or on the links 16 and 21. The seat support 25 carries in the front area on the underside the two bearing brackets 27 and 29, which are inserted through circumferential slots 28 and 30 into the bearing sleeve 31 and rotatably with them the pivot axis 13 are connected. The circumferential slots 28 and 30 allow the pivoting movement of the bearing brackets 27 and 29 between the starting position according to FIG. 1 and the lowered end position of the seat support 25 according to FIG. 3.

Die Lenker 16 und 21 sind bis in den hinteren Bereich des Sitzträgers 25 geführt und tragen die Anlenkachse 17 für das untere Ende des Rückenlehnenträgers 18, auf dem die Rückenlehne 19 fest angebracht werden kann und der wie die Rückenlehne 19 anatomisch geformt sein kann. Zwischen der Drehachse 15 der Lenker 16 und 21 und der Anlenkachse 17 des Rückenlehnenträgers 18 tragen der Lenker 16 und 21 Mitnehmer 23, die als Bolzen ausgebildet sein können. Die Mitnehmer 23 beider Lenker 16 und 21 können auch durch einen einzigen Bolzen gebildet werden. Dasselbe gilt auch für die Drehachse 15 und die Anlenkachse 17, die beide aus einem einzigen oder zwei geteilten Bolzen bestehen können. Die Mitnehmer 23 sind etwa im mittleren Bereich des Sitzträgers 25 in etwa horizontalen Führungsschlitzen 24 von Lagerlaschen 22 verstellbar geführt. Die Lagerlaschen 22 sind an der Unterseite des Sitzträgers 25 angebracht.The links 16 and 21 are guided into the rear region of the seat support 25 and carry the articulation axis 17 for the lower end of the backrest support 18, on which the backrest 19 can be firmly attached and which, like the backrest 19, can be anatomically shaped. Between the axis of rotation 15 of the links 16 and 21 and the articulation axis 17 of the backrest support 18, the links 16 and 21 carry drivers 23, which can be designed as bolts. The drivers 23 of both links 16 and 21 can also be formed by a single bolt. The same applies to the axis of rotation 15 and the articulation axis 17, which can both consist of a single or two split bolts. The drivers 23 are guided in the middle region of the seat support 25 in approximately horizontal guide slots 24 of bearing brackets 22 so as to be adjustable. The bearing brackets 22 are attached to the underside of the seat support 25.

Die Schwenkachse 13 ragt aus beiden Enden der Lagerhülse 13 heraus und dient als Schwenklagerung für die beiden Schwenkhebel 32 und 34, die mit ihren anderen Enden mittels der Drehlager 33 und 35 über der Anlenkachse 17 mit dem Rückenlehnenträger 18 schwenkbar verbunden sind. Die der Schwenkachse 13 zugekehten Endabschnitte 36 und 37 der Schwenkhebel 32 und 34 sind so abgewinkelt, daß sie in der Ausgangsstellung des Stuhles etwa vertikal ausgerichtet sind. Die Länge dieser Endabschnitte 36 und 37 wird so abgestimmt, daß bei der Bewegung der Lager 33 und 35 auf der Bahn 38 die Neigung des Rückenlehnenträgers 18 gegenüber der Absenkneigung des Sitzträgers 25 überproportional zunimmt bzw. abnimmt. Bei der Absenkung des Sitzträgers 25 entgegen der Kraft der Rückstellfeder in der Lagerhülse 31 wird über die mitgenommenen Lenker 16 und 21 der Rückenlehnenträger 18 mit der Rückenlehne 19 abgesenkt, wie die Bahn 40 zeigt.The pivot axis 13 protrudes from both ends of the bearing sleeve 13 and serves as a pivot bearing for the two pivot levers 32 and 34, which are pivotally connected at their other ends by means of the pivot bearings 33 and 35 to the backrest support 18 via the pivot axis 17. The end portions 36 and 37 of the pivot levers 32 and 34 facing the pivot axis 13 are angled such that they are oriented approximately vertically in the starting position of the chair. The length of these end sections 36 and 37 is adjusted so that when the bearings 33 and 35 move on the track 38, the inclination of the backrest support 18 increases or decreases disproportionately to the inclination of the seat support 25. When lowering the Seat support 25 against the force of the return spring in the bearing sleeve 31 is lowered over the entrained handlebars 16 and 21 of the backrest support 18 with the backrest 19, as the path 40 shows.

Aus Fig. 3 ist deutlich zu erkennen, daß dabei eine zusätzliche Absenkbewegung des Rückenlehnenträgers 18 mit der Rückenlehne 19 in Bezug auf den zugekehrten hinteren Bereich des Sitzträgers 25 mit Sitz 26 auftritt. Der Abstand der Anlenkachse 17 vom Sitzträger 25 hat sich dabei vergrößert. Die Mitnehmer 23 bewegen sich dabei auf der Bahn 39.From Fig. 3 it can clearly be seen that an additional lowering movement of the backrest support 18 with the backrest 19 occurs in relation to the facing rear region of the seat support 25 with seat 26. The distance between the articulation axis 17 from the seat support 25 has increased. The drivers 23 move on the web 39.

Der Sitz 26 kann bei dieser Ausgestaltung fest mit dem Sitzträger 25 verbunden werden. Die Schwenkhebel 32 und 34 können Armlehnen tragen oder selbst als Armlehnen ausgebildet sein.In this embodiment, the seat 26 can be firmly connected to the seat support 25. The pivot levers 32 and 34 can carry armrests or can even be designed as armrests.

Der Ansicht nach Fig. 2 ist zu entnehmen, daß der Abstand der beiden Lenker 16 und 21, die eine unverkantbare Schwenklagerung des Rückenlehnenträgers 18 mit der Rückenlehne 19 sicherstellen, etwas größer ist als die Abmessung, z.B. der Durchmesser, der Säule 10. Sind die Lenker 16 und 21 zusätzlich symmetrisch zur Säule 10 angeordnet, dann behindert sie die Absenkung der Lenker 16 und 21 bis in den Bereich der Säule 10 nicht. Die Absenkung kann dabei auch dadurch begrenzt werden, daß die Abschnitte der Lenker 16 und 21 zwischen den Mitnehmern 23 und der Drehachse 15 Anschläge tragen oder selbst als Anschläge dienen. Bei der Absenkung wird der Sitzträger 25 mit dem Sitz 26 leicht in Richtung zur Rückenlehne 19 verschoben, wie der Fig. 3 zu entnehmen ist. Außerdem senkt sich der Sitzträger 25 mit dem Sitz 26 im vorderen Bereich leicht ab. Die Vorderkanten des Sitzträgers 25 und des Sitzes 26 sind konvex nach unten abgerundet, wobei die Abrundung etwa über der Schwenkachse 13 beginnt, wenn sich der Stuhl in der Ausgangsstellung nach Fig. 1 befindet und die Lagerlaschen 27 und 29 vorzugsweise etwa vertikal nach oben gerichtet sind. Die zusätzliche Verstellung des Sitzträgers 25 mit dem Sitz 26 in Richtung zur Rückenlehne 19 hat in Verbindung mit der Absenkung des Sitzträgers 25 mit dem Sitz 26 im vorderen Bereich den Vorteil, daß der Winkel zwischen Oberschenkel und Unterschenkel des Benützers von der Neigungsveränderung des Sitzträgers 25 mit dem Sitz 26 bleibt und damit der Sitzkomfort in jeder Stellung des Stuhles erhalten bleibt.The view according to FIG. 2 shows that the distance between the two links 16 and 21, which ensure that the backrest support 18 with the backrest 19 cannot be tilted, is somewhat larger than the dimension, for example the diameter, of the column 10. Are the Handlebars 16 and 21 additionally arranged symmetrically to the column 10, then it does not hinder the lowering of the handlebars 16 and 21 into the area of the column 10. The lowering can also be limited in that the sections of the links 16 and 21 carry 15 stops between the drivers 23 and the axis of rotation or serve as stops themselves. When lowering, the seat support 25 with the seat 26 is moved slightly in the direction of the backrest 19, as can be seen in FIG. 3. In addition, the seat support 25 lowers slightly with the seat 26 in the front area. The front edges of the seat support 25 and the seat 26 are rounded convexly downward, the rounding starting approximately above the pivot axis 13 when the chair is in the starting position according to FIG. 1 and the bearing plates 27 and 29 are preferably directed approximately vertically upwards. The additional adjustment of the seat support 25 with the seat 26 in the direction of the backrest 19 in connection with the lowering of the seat support 25 with the seat 26 in the front region has the advantage that the angle between the thigh and lower leg of the user from the change in inclination of the seat support 25 the seat 26 remains and thus the seating comfort is maintained in every position of the chair.

Claims (11)

1. A chair, particularly a work or office chair with a seat carrier (25) which is pivoted in its front area around a horizontal pin (13) and has a variable inclination position, with a seat and a backrest carrier (18) with seat back with superproportionally changable inclination position as a forced function of the seat-carrier inclination whereby, with increasing inclination of the seat carrier, the backrest fulfills an additional movement downwards relative to the opposite seat-carrier side, characterized thereby,
that the backrest carrier (18) is mounted at least on one link (16, 21) pivoted on the chair frame (25) near the swivel pin (13),
that the link (16, 21) located between the pivot (17) of the backrest carrier (18) and the rotating pivot (15) is provided with a dog (23) mounted on the chair frame which is adjustably guided in a groove (24) of the seat carrier (25), and
that the backrest carrier (18) preferably on both sides is linked above its pivot (17) with a pivoted lever (32, 34) which, in the area of the swivel pin (13) of the seat carrier (25) is also hinged on the seat frame.
2. Chair according to claim 1, characterized thereby,
that a pair of links (16, 21) is provided which are linked together as one block in the middle region of the width and articulated with the backrest (18),
that the chair frame is provided with a horizontal sleeve (31) locating the swivel pin (13) of the seat carrier (25) and a pull-back spring,
that on the sleeve (31) are shaped two brackets (14, 20) on which the links (16, 21) are hinged, and
that the seat carrier (25) is provided with two brackets (22) having guiding slots (25) shaped as long holes, in which dogs (23) shaped as bolts are adjustably guided.
3. Chair according to claim 1 or 2; characterized thereby,
that the seat carrier (25) is provided with two brackets (27, 29) which are introduced into the sleeve (31) through its peripheral slots (28, 30) and unrotatably linked to the pivoted sleeve (31) and the pivot (13) tensioned via the pull-back spring.
4. Chair according to one of the claims 1 to 3; characterized thereby,
that the sleeve (31) is linked at its ends to a central post (10) of the chair frame via two V-shaped lugs (11, 12).
5. Chair according to claim 4, characterized thereby,
that the post (10), the supports (11, 12) and the shaft (31) with the brackets (14, 20) for the links (16, 21) are manufactured as block casting piece.
6. Chair according to one of the claims 1 to 5, characterized thereby,
that the dogs (23) are located approximately in the middle region of the seat-carrier's depth (25),
that in the rear area of the seat carrier (25) the lower end of the backrest support (18) is mounted on the links (16, 21), and
that the rotating shaft (15) of the links (16, 21) is located approximately in the center between the seat-carrier's (25) swivel pin (13) and the dogs (23) of the links (16, 21), whereby the dogs (23) and the swivel pin (15) in the chair's home position are situated approximately at a horizontal level above the swivel pin (13) of the seat carrier (25) and that this area of the links (16, 21) is at a distance relative to the seat carrier (25).
7. Chair according to one of the claims 1 to 6, characterized thereby,
that the front area of the seat carrier (25) and the seat (26) are cambered downwards, whereby this convexity starts approximately above the swivel pin (13) of the seat carrier (25) and the seat (26) in the home position of the chair.
8. Chair according to one of the claims 1-7, characterized thereby,
that the pivoted levers (32, 34) are provided with bent ends (36, 37) which in the chair's home position are vertically aligned and pivoted on the swivel pin (13) of the seat carrier (25) and matched to the changing inclination of the backrest support (18).
9. Chair according to one of the claims 1 to 8, characterized thereby,
that the sections of the links (16, 21) located between the dogs (23) and the swivel pin (15) limit the maximum inclination of the seat carrier (25) with the seat (26) in their function as stops and
that the sections of the links (16, 21) located between the dogs (23) and the pivot (17) of the backrest frame (18) reset the seat carrier (25) with seat (26) in the home position in their function as stops.
10. Chair according to one of the claims from 1 to 9, characterized thereby,
that the pivoted levers (32, 34) are shaped as armrests or carry armrests.
11. Chair according to one of the claims 1 to 10, characterized thereby,
that the both links (16, 21) are placed to one another at a distance greater than the corresponding dimension of the chair-frame's post (10), and
that the links (16, 21) are placed symmetrically relative to the post (10).
EP89103808A 1988-03-10 1989-03-04 Chair, particularly a work and office chair Expired - Lifetime EP0332088B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89103808T ATE66791T1 (en) 1988-03-10 1989-03-04 CHAIR, ESPECIALLY WORK AND OFFICE CHAIR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3807984 1988-03-10
DE3807984A DE3807984A1 (en) 1988-03-10 1988-03-10 CHAIR, ESPECIALLY WORK OR OFFICE CHAIR

Publications (2)

Publication Number Publication Date
EP0332088A1 EP0332088A1 (en) 1989-09-13
EP0332088B1 true EP0332088B1 (en) 1991-09-04

Family

ID=6349393

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89103808A Expired - Lifetime EP0332088B1 (en) 1988-03-10 1989-03-04 Chair, particularly a work and office chair

Country Status (3)

Country Link
EP (1) EP0332088B1 (en)
AT (1) ATE66791T1 (en)
DE (2) DE3807984A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2047303T3 (en) * 1989-09-21 1994-02-16 Provenda Marketing Ag SEAT HELMET AND USE OF THE SEAT HELMET FOR A CHAIR PROGRAM.
DE4319450C1 (en) * 1993-06-11 1994-07-07 Simon Desanta chair

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7631908U1 (en) * 1976-10-13 1978-04-13 Moll, Reiner, 7070 Schwaebisch Gmuend ARMCHAIR
DE3537203A1 (en) * 1984-10-24 1986-04-24 Klöber GmbH & Co, 7770 Überlingen Work chair with inclination mechanism for seat and back
DE8515221U1 (en) * 1985-05-23 1986-05-22 VOKO - Franz Vogt & Co, 6301 Pohlheim Seating
DE3632131C2 (en) * 1986-06-04 2001-12-13 Hartmut S Engel Functional seating
DE8807931U1 (en) * 1988-06-20 1988-08-11 Wiesner-Hager Kg, Altheim, At

Also Published As

Publication number Publication date
ATE66791T1 (en) 1991-09-15
DE3807984A1 (en) 1989-09-21
DE3807984C2 (en) 1990-05-10
EP0332088A1 (en) 1989-09-13
DE58900251D1 (en) 1991-10-10

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