EP0537542B1 - Chair control for adjusting seats and backrests of chairs, especially office chairs - Google Patents

Chair control for adjusting seats and backrests of chairs, especially office chairs Download PDF

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Publication number
EP0537542B1
EP0537542B1 EP92116616A EP92116616A EP0537542B1 EP 0537542 B1 EP0537542 B1 EP 0537542B1 EP 92116616 A EP92116616 A EP 92116616A EP 92116616 A EP92116616 A EP 92116616A EP 0537542 B1 EP0537542 B1 EP 0537542B1
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EP
European Patent Office
Prior art keywords
spring element
bracket
adjusting device
seat
base part
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
Application number
EP92116616A
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German (de)
French (fr)
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EP0537542A1 (en
Inventor
Konrad Neumüller
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Sifa Sitzfabrik GmbH
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Sifa Sitzfabrik GmbH
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Publication of EP0537542A1 publication Critical patent/EP0537542A1/en
Application granted granted Critical
Publication of EP0537542B1 publication Critical patent/EP0537542B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • 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
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • 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
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03266—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with adjustable elasticity
    • 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
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
    • A47C1/03274—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs of torsion type
    • 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
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03277—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with bar or leaf springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
    • A47C31/12—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons
    • A47C31/126—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons for chairs

Definitions

  • the invention relates to a device for adjusting the weight for the adjustment of seats and backrests in chairs, in particular office swivel chairs according to the preamble of claim 1.
  • Office swivel chairs in which between a sloping downward base part, which has a receptacle for a support foot at its rear, lower end, and a seat support which is pivotally connected to this base part at its front end and which is movably or rigidly connected to a backrest support , or possibly integrally formed therewith, one or more spring elements are arranged, which push the base part and the seat support apart, and means such as Gas springs, clamping screws or a combination of a clamping device with plate packs for determining the inclination between the base part and seat support are provided, and in which a device for weight adjustment is further arranged between the base part and the seat support and this device for weight adjustment consists of an adjustable spring element.
  • Such office swivel chairs can, as described, simply consist of essentially two functional parts, a seat support which is rigidly connected to a backrest support, or is formed in one piece with this and form a base part, or else
  • the inclination of the seat and backrest is adjusted as a function of one another, the adjustment of the seat surfaces and backrests being achieved essentially by three interacting functional parts
  • the first functional part is an obliquely arranged base part, which receives the footrest at its lower, rear end, the base part being pivotally connected at its upper, front end to the front end of the second functional part
  • a seat support the seat support in a behind the connection with the Base part lying area is pivotally connected to the third functional part
  • a backrest support the base part and the backrest support being connected to one another via a link guide, the link guide being arranged such that the inclination of the backrest support depends Depending on the inclination
  • the object of the invention is therefore to provide a device for weight adjustment for the adjustment of seats and backrests in chairs, in particular office swivel chairs, which has a wide and in particular tactile adjustment range.
  • the spring element is supported on one side on the seat support and on the other side on an adjusting device.
  • the adjusting device in turn is supported on one side on the base part and has means for adjusting the spring travel of the spring element on its other front side.
  • the means for adjusting the spring travel can be nuts or other adjusting means which run on a thread in the front area of the adjusting device, but also, for example, eccentric disks which are in the front area of the Adjustment device are arranged.
  • the spring element consists of two leg springs which are connected to one another by a bracket, the free legs being supported on the seat support, and the bracket being displaceable in one on the adjusting device by actuating the nut or the rotary knob Holding part is held.
  • the spring element can be preceded by a second, weaker spring element, the inclination being adjusted against the force of the second, weaker spring element in a first position and the inclination against the force of the stronger spring element being adjusted in a second position of the adjusting device.
  • the second, weaker spring is arranged between the holding part and the nut, or the rotary knob of the adjusting device.
  • the adjustment device advantageously has a rear and / or front stop to limit the adjustment path.
  • a special embodiment of the invention is a device for weight adjustment for the adjustment of seats and backrests in chairs, in particular office swivel chairs, the chairs having a seat support, consisting of a U-shaped base part, the legs of which point upwards and one at one end Receptacle for a central support leg, a T-shaped seat support with downward-facing side tabs, the seat support at its front end, which is closest to the crossbar of the T, with the base part at its end opposite the reception by one in the legs of the base part and the rag of the Seat axis support mounted first axis is pivotally connected, and wherein the base part of the connection with the seat surface support runs obliquely downwards, consisting further of a U-shaped backrest support, the legs of which point downward, and which with the seat support at its rear end by one , in the lobes of the seat support and in a central region of the legs of the backrest support, the second axis is pivotally connected, with a further, third axis in suitable
  • the seat support shown here consists of a U-shaped base part 1, the legs 15 of which point upwards and which has at one end a receptacle 2 for a central support leg, a T-shaped seat support 3 with downward-facing side tabs 14, the Seat support 3 at its front end, which is the first end of the crossbar 13 of the T, is connected to the base part 1 at its end opposite the receptacle 2 so as to be pivotable about a first axis 21 mounted in the legs 15 of the base part 1 and the tabs 14 of the seat support 3.
  • the base part 1 runs obliquely downwards from the connection with the seat support 3.
  • a U-shaped backrest support 4 the legs 16 of which point downward, is pivotally connected to the seat support 3 at its rear end about a second axis 17 mounted in the tab 14 of the seat support 3 and in a central region of the legs 16 of the backrest support 4.
  • a further, third axis 18 is in suitable bores in the legs 15 of the base part 1 approximately in the middle between the connection with the seat support 3 and the receptacle 2 for the support leg, as well as in obliquely obliquely downward, not recognizable, oblong holes the front end of the backrest support 4 stored.
  • the tabs 14 of the seat support 3 at least partially encompass the legs 16 of the backrest support 4 and the legs 16 of the backrest support 4 at least partially encompass the legs 15 of the base part 1.
  • one or more spring elements which push them apart are arranged.
  • two intermeshing plate packs 19 are arranged, the one plate packs having at one end towards the elongated holes of the backrest support, elongated holes in which the third axis 18 is guided and on their the other end are rotatably mounted on bolts in the legs 16 of the backrest support 4 and the other plate packs have elongated holes at one end towards the elongated holes of the backrest support 4 in which the third axis 18 is guided and at their other end rotatable on bolts in the tabs 14 of the seat support 3 are mounted.
  • Coaxial to Third axis 18 clamping means are provided for the non-positive connection of the plate packs 19 with the backrest support 4 and the base part 1.
  • a device for adjusting the weight is arranged between the base part 1 and the seat support 3 and this device for adjusting the weight consists of an adjustable spring element 6, the spring element 6 being on one side on the seat support 3 and on the other side on an adjusting device 7 supports, wherein the adjusting device 7 is a rod 20, which is supported on one side on the base part 1 and on its other side has a thread on which a nut or a rotary knob 8 runs to adjust the spring travel of the spring element 6.
  • the spring element 6 consists of two leg springs 9 which are connected to one another by a bracket.
  • the free legs are supported on the seat support 3, the bracket being held in a holding part 10 which can be displaced on the adjusting device 7 by actuating the nut or the rotary knob 8.
  • the spring element 6 is preceded by a second, weaker spring element 11, with the adjustment of the inclination against the force of the second, weaker spring element 11 in a first position of the adjusting device 7 and the adjustment of the inclination against the force of the in a second position of the adjusting device 7 stronger spring element 6 happens.
  • the second, weaker spring 11 is arranged between the holding part 10 and the nut, or the rotary knob 8 of the adjusting device 7.
  • a sleeve 12 can be arranged on the rod 20 as a rear stop for the holding part 10 or the adjusting device 7.
  • the holding part 10 is advantageously designed so that it extends laterally over a larger area of the bracket of the spring element 6.
  • the holding part 10 can also accommodate a part of the second, weaker spring element 11 drill a hole.
  • the second, weaker spring element can be received entirely in a bore of the rotary knob 8.
  • the device for weight adjustment for the adjustment of seats and backrests in chairs in particular office swivel chairs, is set for a particularly light person. I.e. when pushing back the backrest connected to the backrest support 4, only the second, weaker spring element is compressed. If the device is to be adjusted to a heavier person, the rotary knob 8 on the thread of the rod 20 is adjusted in the direction of the stronger spring element 6 and this spring element 6 is set to the desired pretension.

Abstract

A device for adjusting the weight for adjusting seats and backrests of chairs, in particular office swivel chairs, wherein one or more spring elements are arranged between a base part (1), which extends obliquely downwards and has a receiver (2) for a support foot at its rear lower end, and a seat support (3) which is pivotably connected to said base part (1) at the front end of the latter and is connected movably or rigidly to a backrest support (4) or may be of integral construction therewith, which spring elements press the base part (1) and the seat support (3) apart, wherein means such as gas springs, clamping screws or a combination of a clamping device with laminate stacks are provided to fix the inclination between the base part (1) and the seat support (3), and wherein a device for adjusting the weight is arranged between the base part (1) and the seat support (3) and said device for adjusting the weight consists of an adjustable spring element (6), wherein, furthermore, the spring element (6) is supported on one side on the seat support (3) and on the other side on an adjusting device, and wherein the adjusting device is supported on one side on the base part (1) and on its other side has means (8) for adjusting the spring path of the spring element (6). <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zur Gewichtseinstellung für die Einstellung von Sitzflächen und Rückenlehnen bei Stühlen, insbesondere Bürodrehstühlen gemäß Oberbegriff des Anspruchs 1.The invention relates to a device for adjusting the weight for the adjustment of seats and backrests in chairs, in particular office swivel chairs according to the preamble of claim 1.

Es sind Bürodrehstühle bekannt, bei denen zwischen einem schräg nach unten verlaufenden Basisteil, welches an seinem hinteren, unteren Ende eine Aufnahme für einen Stützfuß aufweist, und einem mit diesem Basisteil an dessen vorderen Ende schwenkbar verbundenen Sitzflächenträger, welcher beweglich oder starr mit einem Rückenlehnenträger verbunden, oder ggf. einstückig mit diesem ausgebildet ist, eine oder mehrere Federelemente angeordnet sind, die das Basisteil und den Sitzflächenträger auseinanderdrücken, und wobei Mittel wie z.B. Gasfedern, Klemmschrauben oder eine Kombination aus einer Klemmvorrichtung mit Lamellenpaketen zur Feststellung der Neigung zwischen Basisteil und Sitzflächenträger vorgesehen sind, und bei denen ferner zwischen dem Basisteil und dem Sitzflächenträger eine Vorrichtung zur Gewichtseinstellung angeordnet ist und diese Vorrichtung zur Gewichtseinstellung aus einem einstellbaren Federelement besteht.Office swivel chairs are known, in which between a sloping downward base part, which has a receptacle for a support foot at its rear, lower end, and a seat support which is pivotally connected to this base part at its front end and which is movably or rigidly connected to a backrest support , or possibly integrally formed therewith, one or more spring elements are arranged, which push the base part and the seat support apart, and means such as Gas springs, clamping screws or a combination of a clamping device with plate packs for determining the inclination between the base part and seat support are provided, and in which a device for weight adjustment is further arranged between the base part and the seat support and this device for weight adjustment consists of an adjustable spring element.

Solche Bürodrehstühle können, wie beschrieben, einfach aus im wesentlichen zwei Funktionsteilen, einem Sitzflächenträger, welcher starr mit einem Rückenlehnenträger verbunden, oder einstückig mit diesem ausgebildet ist und einem Basisteil bestehen, oder aber auch, wie bei anderen bekannten Bürodrehstühlen, beispielsweise nach der EP 0 179 933 B1, erfolgt die Verstellung der Neigung von Sitzfläche und Rückenlehne in Abhängigkeit voneinander, wobei die Einstellung der Sitzflächen und Rückenlehnen im wesentlichen durch drei zusammenwirkende Funktionsteile erreicht wird, wobei das erste Funktionsteil ein schräg angeordnetes Basisteil ist, welches an seinem unteren, hinteren Ende die Fußstütze aufnimmt, wobei das Basisteil an seinem oberen, vorderen Ende schwenkbar mit dem vorderen Ende des zweiten Funktionsteils, einem Sitzflächenträger verbunden ist, wobei der Sitzflächenträger in einem hinter der Verbindung mit dem Basisteil liegenden Bereich schwenkbar mit dem dritten Funktionsteil, einem Rückenlehnenträger verbunden ist, wobei das Basisteil und der Rückenlehnenträger über eine Kulissenführung miteinander verbunden sind, wobei die Kulissenführung derart angeordnet ist, daß die Neigung des Rückenlehnenträgers in Abhängigkeit der Neigung des Sitzträgers erfolgt, wobei zwischen dem Basisteil und dem Sitzflächenträger Druckfedern angeordnet sind, und wobei Mittel zur Feststellung und Losung der jeweils gewünschten Neigung vorgesehen sind.Such office swivel chairs can, as described, simply consist of essentially two functional parts, a seat support which is rigidly connected to a backrest support, or is formed in one piece with this and form a base part, or else Also, as with other known office swivel chairs, for example according to EP 0 179 933 B1, the inclination of the seat and backrest is adjusted as a function of one another, the adjustment of the seat surfaces and backrests being achieved essentially by three interacting functional parts, the first functional part is an obliquely arranged base part, which receives the footrest at its lower, rear end, the base part being pivotally connected at its upper, front end to the front end of the second functional part, a seat support, the seat support in a behind the connection with the Base part lying area is pivotally connected to the third functional part, a backrest support, the base part and the backrest support being connected to one another via a link guide, the link guide being arranged such that the inclination of the backrest support depends Depending on the inclination of the seat support, compression springs are arranged between the base part and the seat support, and means are provided for determining and solving the desired inclination.

Bei den vorgenannten, bekannten Stühlen löst die bedienende Person die Feststellmittel und bewegt die Rückenlehne und die Sitzfläche zueinander im wesentlichen durch Verlagerung ihres Körpergewichts. Da hier erhebliche Unterschiede bei der jeweiligen bedienenden Person vorliegen, geschieht die Einstellung der Neigung mehr oder weniger leicht, bzw. komfortabel.In the aforementioned, known chairs, the operator releases the locking means and moves the backrest and the seat to one another essentially by shifting their body weight. Since there are considerable differences in the respective operating person, the inclination can be adjusted more or less easily or comfortably.

Es war daher wünschenswert, zusätzlich eine Vorrichtung zur Gewichtseinstellung vorzusehen, durch die die zur Verstellung der Neigung benötigte Kraft, d.h. entsprechend dem Körpergewicht, eingestellt werden kann. Für Stühle der eingangs geschilderten Art wurde eine Lösung vorgeschlagen, bei welcher zwischen dem Basisteil und dem Sitzflächenträger eine Vorrichtung zur Gewichtseinstellung wirkt und diese Vorrichtung zur Gewichtseinstellung aus einem einstellbaren Federelement besteht. Hierzu wurde auf einem Ende einer Stange, deren anderes Ende sich auf dem Sitzflächenträger abstützte, eine Druckfeder angeordnet, die durch Betätigung eines auf einem in den vorderen Bereich der Stange geschnittenen Gewinde laufenden Drehknopfes gegen eine am Basiskörper angeordnete Abstützplatte zusammengedrückt werden konnte, wobei die zur Einstellung der Neigung von Sitzfläche und Rückenlehne nötige Kraft verstellbar war (DE-A-3 322 450)It was therefore desirable to additionally provide a device for weight adjustment, by means of which the force required to adjust the inclination, ie according to the body weight, can be adjusted. For chairs of the type described above, a solution has been proposed in which between the base part and the seat support has a device for weight adjustment and this device for weight adjustment consists of an adjustable spring element. For this purpose, a compression spring was arranged on one end of a rod, the other end of which was supported on the seat support, which could be compressed by pressing a rotary knob running on a thread cut into the front region of the rod against a support plate arranged on the base body, the Adjustment of the inclination of the seat and backrest required force was adjustable (DE-A-3 322 450)

Aufgabe der Erfindung ist es daher, eine Vorrichtung zur Gewichtseinstellung für die Einstellung von Sitzflächen und Rückenlehnen bei Stühlen, insbesondere Bürodrehstühlen, zu schaffen, welche einen weiten und insbesondere fühlbaren Verstellbereich aufweist.The object of the invention is therefore to provide a device for weight adjustment for the adjustment of seats and backrests in chairs, in particular office swivel chairs, which has a wide and in particular tactile adjustment range.

Diese Aufgabe wird mit den im kennzeichnenden Teil des Anspruchs 1 genannten Merkmalen gelöst.This object is achieved with the features mentioned in the characterizing part of claim 1.

Fortbildungen und besondere Ausführungen der Erfindung sind in den weiteren Ansprüchen umfaßt.Developments and special embodiments of the invention are included in the further claims.

Erfindungsgemäß stützt sich das Federelement nach der einen Seite hin an dem Sitzflächenträger und nach der anderen Seite hin an einer Verstellvorrichtung ab. Die Verstellvorrichtung wiederum ist an ihrer einen Seite an dem Basisteil abgestützt und weist an ihrer anderen, vorderen Seite Mittel zur Einstellung des Federwegs des Federelements auf. Die Mittel zur Einstellung des Federwegs können Muttern oder andere Stellmittel sein, welche auf einem Gewinde im vorderen Bereich der Verstellvorrichtung laufen, aber auch z.B. Exzenterscheiben, die im vorderen Bereich der Verstellvorrichtung angeordnet sind.According to the invention, the spring element is supported on one side on the seat support and on the other side on an adjusting device. The adjusting device in turn is supported on one side on the base part and has means for adjusting the spring travel of the spring element on its other front side. The means for adjusting the spring travel can be nuts or other adjusting means which run on a thread in the front area of the adjusting device, but also, for example, eccentric disks which are in the front area of the Adjustment device are arranged.

Nach einer bevorzugten Ausführung der Erfindung besteht das Federelement aus zwei Schenkelfedern, welche durch einen Bügel miteinander verbunden sind, wobei sich die freien Schenkel an dem Sitzflächenträger abstützen, und wobei der Bügel in einem auf der Verstellvorrichtung durch Betätigung der Mutter, bzw. des Drehknopfs verschiebbaren Halteteil gehalten wird.According to a preferred embodiment of the invention, the spring element consists of two leg springs which are connected to one another by a bracket, the free legs being supported on the seat support, and the bracket being displaceable in one on the adjusting device by actuating the nut or the rotary knob Holding part is held.

Dem Federelement kann ein zweites, schwächeres Federelement vorgeordnet sein, wobei in einer ersten Stellung der Verstellvorrichtung die Einstellung der Neigung gegen die Kraft des zweiten, schwächeren Federelements und in einer zweiten Stellung der Verstellvorrichtung die Einstellung der Neigung gegen die Kraft des stärkeren Federelements geschieht. Die zweite, schwächere Feder ist zwischen dem Halteteil und der Mutter, bzw. dem Drehknopf der Verstellvorrichtung angeordnet.The spring element can be preceded by a second, weaker spring element, the inclination being adjusted against the force of the second, weaker spring element in a first position and the inclination against the force of the stronger spring element being adjusted in a second position of the adjusting device. The second, weaker spring is arranged between the holding part and the nut, or the rotary knob of the adjusting device.

Vorteilhafterweise weist die Verstellvorrichtung einen hinteren und/oder vorderen Anschlag zur Begrenzung des Verstellweges auf.The adjustment device advantageously has a rear and / or front stop to limit the adjustment path.

Eine besondere Ausführung der Erfindung ist eine Vorrichtung zur Gewichtseinstellung für die Einstellung von Sitzflächen und Rückenlehnen bei Stühlen, insbesondere Bürodrehstühlen, wobei die Stühle einen Sitzträger aufweisen, bestehend aus einem u-förmigen Basisteil, dessen Schenkel nach oben weisen und der an seinem einen Ende eine Aufnahme für ein zentrales Stützbein aufweist, einem T-förmigen Sitzflächenträger mit nach unten gerichteten seitlichen Lappen, wobei der Sitzflächenträger an seinem vorderen, dem Querbalken des T zunächstgelegenen Ende, mit dem Basisteil an dessen, der Aufnahme gegenüberliegenden Ende um eine in den Schenkeln des Basisteils und den Lappen des Sitzflächenträgers gelagerte erste Achse schwenkbar verbunden ist, und wobei der Basisteil von der Verbindung mit dem Sitzflächenträger schräg nach unten hinten verläuft, bestehend weiter aus einem u-förmigen Rückenlehnenträger, dessen Schenkel nach unten weisen, und welcher mit dem Sitzflächenträger an dessen hinteren Ende um eine, in den Lappen des Sitzflächenträgers und in einem mittleren Bereich der Schenkel des Rückenlehnenträgers gelagerte zweite Achse schwenkbar verbunden ist, wobei eine weitere, dritte Achse in passenden Bohrungen in den Schenkeln des Basisteils etwa in der Mitte zwischen der Verbindung mit dem Sitzflächenträger und der Aufnahme für das Stützbein, sowie in schräg nach vorne unten gerichteten Langlöchern an dem vorderen Ende des Rückenlehnenträgers gelagert ist, wobei die Lappen des Sitzflächenträgers die Schenkel des Rückenlehnenträgers wenigstens teilweise umfassen und die Schenkel des Rückenlehnenträgers die Schenkel des Basisteils wenigstens teilweise umfassen, wobei zwischen dem Sitzflächenträger und dem Basisteil eine oder mehrere, diese auseinanderdrückende Federelemente angeordnet sind, und wobei zwischen den Lappen des Sitzflächenträgers und den Schenkeln des Rückenlehnenträgers jeweils zwei ineinanderkämmende Lamellenpakete angeordnet sind, wobei die einen Lamellenpakete an ihrem einen Ende zu den Langlöchern des Rückenlehnenträgers hin Langlöcher aufweisen, in welchen die dritte Achse geführt ist und an ihrem anderen Ende drehbar auf Bolzen in den Schenkeln des Rückenlehnenträgers gelagert sind, und die anderen Lamellenpakete an ihrem einen Ende zu den Langlöchern des Rückenlehnenträgers hin Langlöcher aufweisen, in welchen die dritte Achse geführt ist und an ihrem anderen Ende drehbar auf Bolzen in den Lappen des Sitzflächenträgers gelagert sind, und wobei koaxial zur dritten Achse angeordnete Spannmittel zur kraftschlüssigen Verbindung der Lamellenpakete mit dem Rückenlehnenträger und dem Basisteil vorgesehen sind, und wobei zwischen dem Basisteil und dem Sitzflächenträger eine Vorrichtung zur Gewichtseinstellung angeordnet ist und diese Vorrichtung zur Gewichtseinstellung aus einem einstellbaren Federelement besteht, wobei sich das Federelement nach der einen Seite hin an dem Sitzflächenträger, und nach der anderen Seite hin an einer Verstellvorrichtung abstützt, wobei die Verstellvorrichtung an ihrer einen Seite an dem Basisteil abgestützt ist und an ihrer anderen Seite ein Gewinde aufweist, auf welchem eine Mutter oder ein Drehknopf zur Einstellung des Federwegs des Federelements läuft, wobei weiter das Federelement aus zwei Schenkelfedern, welche durch einen Bügel miteinander verbunden sind, besteht, wobei sich die freien Schenkel an dem Sitzflächenträger abstützen, und wobei der Bügel in einem auf der Verstellvorrichtung durch Betätigung der Mutter, bzw. des Drehknopfs verschiebbaren Halteteil gehalten wird, wobei dem Federelement ein zweites, schwächeres Federelement vorgeordnet ist, und wobei weiter in einer ersten Stellung der Verstellvorrichtung die Einstellung der Neigung gegen die Kraft des zweiten, schwächeren Federelements, und in einer zweiten Stellung der Verstellvorrichtung die Einstellung der Neigung gegen die Kraft des stärkeren Federelements geschieht, und wobei schließlich die zweite, schwächere Feder zwischen dem Halteteil und der Mutter, bzw. dem Drehknopf der Verstellvorrichtung angeordnet ist.A special embodiment of the invention is a device for weight adjustment for the adjustment of seats and backrests in chairs, in particular office swivel chairs, the chairs having a seat support, consisting of a U-shaped base part, the legs of which point upwards and one at one end Receptacle for a central support leg, a T-shaped seat support with downward-facing side tabs, the seat support at its front end, which is closest to the crossbar of the T, with the base part at its end opposite the reception by one in the legs of the base part and the rag of the Seat axis support mounted first axis is pivotally connected, and wherein the base part of the connection with the seat surface support runs obliquely downwards, consisting further of a U-shaped backrest support, the legs of which point downward, and which with the seat support at its rear end by one , in the lobes of the seat support and in a central region of the legs of the backrest support, the second axis is pivotally connected, with a further, third axis in suitable bores in the legs of the base part approximately in the middle between the connection to the seat support and the receptacle for the support leg, as well as in obliquely downward oblong holes at the front end of the backrest support, the tabs of the seat support at least partially encompass the legs of the backrest support and the legs of the backrest support the legs of the base part s include at least partially, wherein one or more spring elements that push them apart are arranged between the seat support and the base part, and wherein two intermeshing plate packs are arranged between the tabs of the seat support and the legs of the backrest support, the one plate packs at one end have elongated holes in the elongated holes of the backrest support, in which the third axis is guided and at their other end are rotatably mounted on bolts in the legs of the backrest support, and the other plate packs have elongated holes at one end towards the elongated holes of the backrest support, in which the third axis is guided and at its other end rotatably mounted on bolts in the tabs of the seat support, and wherein clamping means arranged coaxially to the third axis for the non-positive connection of the plate packs to the backrest center eng and the base part are provided, and wherein between the Base part and the seat support a weight adjustment device is arranged and this weight adjustment device consists of an adjustable spring element, the spring element is supported on one side on the seat support and on the other side on an adjusting device, the adjusting device on it one side is supported on the base part and on its other side has a thread on which a nut or a rotary knob for adjusting the spring travel of the spring element runs, the spring element further consisting of two leg springs which are connected to one another by a bracket, wherein the free legs are supported on the seat support, and the bracket is held in a holding part which can be displaced on the adjusting device by actuating the nut or the rotary knob, the spring element being preceded by a second, weaker spring element, and being wide r in a first position of the adjusting device, the adjustment of the inclination against the force of the second, weaker spring element, and in a second position of the adjusting device, the adjustment of the inclination against the force of the stronger spring element takes place, and finally the second, weaker spring between the holding part and the nut, or the rotary knob of the adjusting device is arranged.

Im Folgenden wird die zuletzt geschilderte Ausführung der Erfindung anhand einer Zeichnung näher beschreiben.The last-described embodiment of the invention is described in more detail below with reference to a drawing.

Der hier dargestellte Sitzträger besteht aus einem u-förmigen Basisteil 1, dessen Schenkel 15 nach oben weisen und das an seinem einen Ende eine Aufnahme 2 für ein zentrales Stützbein aufweist, einem T-förmigen Sitzflächenträger 3 mit nach unten gerichteten seitlichen Lappen 14, wobei der Sitzflächenträger 3 an seinem vorderen, dem Querbalken 13 des T zunächstgelegenen Ende, mit dem Basisteil 1 an dessen, der Aufnahme 2 gegenüberliegenden Ende um eine in den Schenkeln 15 des Basisteils 1 und den Lappen 14 des Sitzflächenträgers 3 gelagerte erste Achse 21 schwenkbar verbunden ist. Das Basisteil 1 verläuft von der Verbindung mit dem Sitzflächenträger 3 schräg nach unten hinten. Ein u-förmiger Rückenlehnenträger 4, dessen Schenkel 16 nach unten weisen ist mit dem Sitzflächenträger 3 an dessen hinteren Ende um eine, in den Lappen 14 des Sitzflächenträgers 3 und in einem mittleren Bereich der Schenkel 16 des Rückenlehnenträgers 4 gelagerte zweite Achse 17 schwenkbar verbunden. Eine weitere, dritte Achse 18 ist in passenden Bohrungen in den Schenkeln 15 des Basisteils 1 etwa in der Mitte zwischen der Verbindung mit dem Sitzflächenträger 3 und der Aufnahme 2 für das Stützbein, sowie in schräg nach vorne unten gerichteten, hier nicht erkennbaren, Langlöchern an dem vorderen Ende des Rückenlehnenträgers 4 gelagert. Die Lappen 14 des Sitzflächenträgers 3 umfassen die Schenkel 16 des Rückenlehnenträgers 4 wenigstens teilweise und die Schenkel 16 des Rückenlehnenträgers 4 umfassen die Schenkel 15 des Basisteils 1 wenigstens teilweise. Zwischen dem Sitzflächenträger 3 und dem Basisteil 1 sind eine oder mehrere, diese auseinanderdrückende, hier nicht gezeigte Federelemente angeordnet. Zwischen den Lappen 14 des Sitzflächenträgers 3 und den Schenkeln 16 des Rückenlehnenträgers 4 sind jeweils zwei ineinanderkämmende Lamellenpakete 19 angeordnet sind, wobei die einen Lamellenpakete an ihrem einen Ende zu den Langlöchern des Rückenlehnenträgers hin Langlöcher aufweisen in welchen die dritte Achse 18 geführt ist und an ihrem anderen Ende drehbar auf Bolzen in den Schenkeln 16 des Rückenlehnenträgers 4 gelagert sind und die anderen Lamellenpakete an ihrem einen Ende zu den Langlöchern des Rückenlehnenträgers 4 hin Langlöcher aufweisen in welchen die dritte Achse 18 geführt ist und an ihrem anderen Ende drehbar auf Bolzen in den Lappen 14 des Sitzflächenträgers 3 gelagert sind. Koaxial zur dritten Achse 18 sind hier nicht gezeigte Spannmittel zur kraftschlüssigen Verbindung der Lamellenpakete 19 mit dem Rückenlehnenträger 4 und dem Basisteil 1 vorgesehen. Zwischen dem Basisteil 1 und dem Sitzflächenträger 3 ist eine Vorrichtung zur Gewichtseinstellung angeordnet und diese Vorrichtung zur Gewichtseinstellung besteht aus einem einstellbaren Federelement 6, wobei sich das Federelement 6 nach der einen Seite hin an dem Sitzflächenträger 3, und nach der anderen Seite hin an einer Verstellvorrichtung 7 abstützt, wobei die Verstellvorrichtung 7 eine Stange 20 ist, die an ihrer einen Seite an dem Basisteil 1 abgestützt ist und an ihrer anderen Seite ein Gewinde aufweist, auf welchem eine Mutter oder ein Drehknopf 8 zur Einstellung des Federwegs des Federelements 6 läuft. Das Federelement 6 besteht aus zwei Schenkelfedern 9, welche durch einen Bügel miteinander verbunden sind. Die freien Schenkel stützen sich an dem Sitzflächenträger 3 ab, wobei der Bügel in einem auf der Verstellvorrichtung 7 durch Betätigung der Mutter, bzw. des Drehknopfs 8 verschiebbaren Halteteil 10 gehalten wird. Dem Federelement 6 ist ein zweites, schwächeres Federelement 11 vorgeordnet, wobei in einer ersten Stellung der Verstellvorrichtung 7 die Einstellung der Neigung gegen die Kraft des zweiten, schwächeren Federelements 11, und in einer zweiten Stellung der Verstellvorrichtung 7 die Einstellung der Neigung gegen die Kraft des stärkeren Federelements 6 geschieht. Die zweite, schwächere Feder 11 ist zwischen dem Halteteil 10 und der Mutter, bzw. dem Drehknopf 8 der Verstellvorrichtung 7 angeordnet.The seat support shown here consists of a U-shaped base part 1, the legs 15 of which point upwards and which has at one end a receptacle 2 for a central support leg, a T-shaped seat support 3 with downward-facing side tabs 14, the Seat support 3 at its front end, which is the first end of the crossbar 13 of the T, is connected to the base part 1 at its end opposite the receptacle 2 so as to be pivotable about a first axis 21 mounted in the legs 15 of the base part 1 and the tabs 14 of the seat support 3. The base part 1 runs obliquely downwards from the connection with the seat support 3. A U-shaped backrest support 4, the legs 16 of which point downward, is pivotally connected to the seat support 3 at its rear end about a second axis 17 mounted in the tab 14 of the seat support 3 and in a central region of the legs 16 of the backrest support 4. A further, third axis 18 is in suitable bores in the legs 15 of the base part 1 approximately in the middle between the connection with the seat support 3 and the receptacle 2 for the support leg, as well as in obliquely obliquely downward, not recognizable, oblong holes the front end of the backrest support 4 stored. The tabs 14 of the seat support 3 at least partially encompass the legs 16 of the backrest support 4 and the legs 16 of the backrest support 4 at least partially encompass the legs 15 of the base part 1. Between the seat support 3 and the base part 1, one or more spring elements, not shown here, which push them apart are arranged. Between the tabs 14 of the seat support 3 and the legs 16 of the backrest support 4, two intermeshing plate packs 19 are arranged, the one plate packs having at one end towards the elongated holes of the backrest support, elongated holes in which the third axis 18 is guided and on their the other end are rotatably mounted on bolts in the legs 16 of the backrest support 4 and the other plate packs have elongated holes at one end towards the elongated holes of the backrest support 4 in which the third axis 18 is guided and at their other end rotatable on bolts in the tabs 14 of the seat support 3 are mounted. Coaxial to Third axis 18 clamping means, not shown here, are provided for the non-positive connection of the plate packs 19 with the backrest support 4 and the base part 1. A device for adjusting the weight is arranged between the base part 1 and the seat support 3 and this device for adjusting the weight consists of an adjustable spring element 6, the spring element 6 being on one side on the seat support 3 and on the other side on an adjusting device 7 supports, wherein the adjusting device 7 is a rod 20, which is supported on one side on the base part 1 and on its other side has a thread on which a nut or a rotary knob 8 runs to adjust the spring travel of the spring element 6. The spring element 6 consists of two leg springs 9 which are connected to one another by a bracket. The free legs are supported on the seat support 3, the bracket being held in a holding part 10 which can be displaced on the adjusting device 7 by actuating the nut or the rotary knob 8. The spring element 6 is preceded by a second, weaker spring element 11, with the adjustment of the inclination against the force of the second, weaker spring element 11 in a first position of the adjusting device 7 and the adjustment of the inclination against the force of the in a second position of the adjusting device 7 stronger spring element 6 happens. The second, weaker spring 11 is arranged between the holding part 10 and the nut, or the rotary knob 8 of the adjusting device 7.

Als hinterer Anschlag für das Halteteil 10, bzw. die Verstellvorrichtung 7 kann eine Hülse 12 auf der Stange 20 angeordnet sein. Das Halteteil 10 ist vorteilhafterweise so ausgeführt, daß es sich seitlich über einen größeren Bereich des Bügels des Federlements 6 erstreckt. Zur Aufnahme eines Teils des zweiten, schwächeren Federlements 11 kann das Halteteil 10 auch eine Bohrung aufnehmen. Das zweite, schwächere Federelement kann ganz in einer Bohrung des Drehknopfes 8 aufgenommen werden.A sleeve 12 can be arranged on the rod 20 as a rear stop for the holding part 10 or the adjusting device 7. The holding part 10 is advantageously designed so that it extends laterally over a larger area of the bracket of the spring element 6. The holding part 10 can also accommodate a part of the second, weaker spring element 11 drill a hole. The second, weaker spring element can be received entirely in a bore of the rotary knob 8.

In der gezeigten Stellung ist die Vorrichtung zur Gewichtseinstellung für die Einstellung von Sitzflächen und Rückenlehnen bei Stühlen, insbesondere Bürodrehstühlen, für eine besonders leichte Person eingestellt. D.h. beim Zurückdrücken der mit dem Rückenlehnenträger 4 verbundenen Rückenlehne wird lediglich das zweite, scwächere Federelement zusammengedrückt. Soll die Vorrichtung auf eine schwerere Person eingestellt werden, wird der Drehknopf 8 auf dem Gewinde der Stange 20 in Richtung auf das stärkere Federelement 6 verstellt und dieses Federlement 6 auf die gewünschte Vorspannung eingestellt.In the position shown, the device for weight adjustment for the adjustment of seats and backrests in chairs, in particular office swivel chairs, is set for a particularly light person. I.e. when pushing back the backrest connected to the backrest support 4, only the second, weaker spring element is compressed. If the device is to be adjusted to a heavier person, the rotary knob 8 on the thread of the rod 20 is adjusted in the direction of the stronger spring element 6 and this spring element 6 is set to the desired pretension.

Claims (9)

  1. A load adjusting device for the adjustment of seats and back rests on chairs, particularly revolving office chairs, in which, between a rearwardly downwardly inclined base (1) having a locating point (2) for a supporting foot at is rear end, and a seat bracket (3) pivotally attached to the forward end of said base (1) and connected either movably or rigidly to a back rest bracket (4) or, alternatively, is constructed in one piece with said back rest bracket, one or more spring elements are arranged which force apart the base section and the seat bracket, in which means are provided, such as gas operated springs, clamping screws or a combination of a clamping device and disc packs (19), for adjusting the angle of inclination between the base section (1) and the seat bracket (3), in which, arranged between the base section (1) and the seat surface bracket (3) there is a load adjusting device comprising a spring element (6) adjustable by means of a positioning device (7), and in which the positioning device (7) is supported at one side on the base (1) and, on the other side, has means for adjusting the deflection of the spring element (6), characterised in that the spring element (6) is supported, at one side, on the seat bracket (3) and, at the other side, on the positioning device (7).
  2. A load adjusting device according to Claim 1, characterised in that the means for adjusting the spring deflection are nuts or other means of adjustment engaged on a thread in the forward part of the positioning device.
  3. A load adjusting device according to Claim 1, characterised in that the means for adjusting the spring deflection are eccentric plates which are arranged in the forward part of the positioning device.
  4. A load adjusting device according to Claim 1, characterised in that the adjustment of the seat and back rests is essentially achieved by means of three interdependent functional parts, the first of which is an inclined base (1) which has a locating point for the foot support on its lower, rearward end, and is pivotally connected at its upper, forward end, to the forward end of the second functional part which is a seat bracket (3) pivotally connected, in a region located behind the connection to the base (1) the third functional part which is a back rest bracket in which the base (1) and the back rest bracket (4) are connected to each other by means of a connecting link mechanism which is arranged in such a way that the inclination of the back rest bracket (4) is dependent on the inclination of the seat bracket (3), and in which compression springs are arranged between the base (1) and the seat surface bracket (3), and means are provided for setting and releasing the specifically desired angle of inclination.
  5. A load adjusting device according to Claim 1, characterised in that the spring element has a progressive characteristic.
  6. A load adjusting device according to Claim 1, characterised in that the spring element consists of two lateral arm springs (9) which are connected to each other by means of a stirrup clip, in which the free arms are supported on the seat bracket, and in which the stirrup clip is held in a retaining component which can be moved along the positioning device (7) by operation of the nut or rotating control knob (8).
  7. A load adjusting device according to Claim 1, characterised in that there is a second, less powerful spring element (11) arranged in front of the spring element (6), and in that, in a first setting of the positioning device (7), the adjustment of the angle of inclination takes place against the force of the second, less powerful spring element (11), and, in a second setting of the positioning device (7), the adjustment of the angle of inclination takes place against the force of the stronger spring element (6).
  8. A load adjusting device according to the Claims 6 and 7, characterised in that the second, less powerful spring (11) is arranged between the retaining component and the means for adjusting the spring deflection.
  9. A load adjusting device according to Claim 1, characterised in that the positioning device includes a rearward and/or forward stop for limiting the positioning movement.
EP92116616A 1991-10-16 1992-09-29 Chair control for adjusting seats and backrests of chairs, especially office chairs Expired - Lifetime EP0537542B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9112861U DE9112861U1 (en) 1991-10-16 1991-10-16
DE9112861U 1991-10-16

Publications (2)

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EP0537542A1 EP0537542A1 (en) 1993-04-21
EP0537542B1 true EP0537542B1 (en) 1996-01-31

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Family Applications (1)

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EP92116616A Expired - Lifetime EP0537542B1 (en) 1991-10-16 1992-09-29 Chair control for adjusting seats and backrests of chairs, especially office chairs

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US (1) US5340194A (en)
EP (1) EP0537542B1 (en)
AT (1) ATE133543T1 (en)
AU (1) AU658229B2 (en)
CA (1) CA2080720A1 (en)
DE (2) DE9112861U1 (en)
ES (1) ES2082313T3 (en)
FI (1) FI924617A (en)
MY (1) MY129980A (en)

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US6598936B1 (en) 2001-04-11 2003-07-29 Michael N. Klein Multi-task mid-pivot chair control mechanism
US6644743B1 (en) * 2003-03-04 2003-11-11 Chang-Chen Lin Chair chassis
US7066538B2 (en) * 2003-12-30 2006-06-27 Hni Technologies, Inc. Chair with tilt lock mechanism
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EP2013058B1 (en) * 2006-04-24 2009-12-16 Crown Equipment Corporation Materials handling vehicles having seats with pivoting backrests
TW200950726A (en) * 2008-06-06 2009-12-16 Fon Chin Ind Co Ltd Front-and-back reciprocating, reclining, lifting and lowering apparatus for a chair back
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EP2772156B1 (en) 2013-02-27 2020-04-29 L&P Property Management Company Tilt mechanism for a chair and chair
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Also Published As

Publication number Publication date
ATE133543T1 (en) 1996-02-15
DE59205227D1 (en) 1996-03-14
AU658229B2 (en) 1995-04-06
MY129980A (en) 2007-05-31
EP0537542A1 (en) 1993-04-21
US5340194A (en) 1994-08-23
DE9112861U1 (en) 1992-01-02
FI924617A0 (en) 1992-10-13
AU2703192A (en) 1993-04-22
CA2080720A1 (en) 1993-04-17
ES2082313T3 (en) 1996-03-16
FI924617A (en) 1993-04-17

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