EP1127522A2 - Spring unit for weight adjustment of a chair - Google Patents

Spring unit for weight adjustment of a chair Download PDF

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Publication number
EP1127522A2
EP1127522A2 EP01104641A EP01104641A EP1127522A2 EP 1127522 A2 EP1127522 A2 EP 1127522A2 EP 01104641 A EP01104641 A EP 01104641A EP 01104641 A EP01104641 A EP 01104641A EP 1127522 A2 EP1127522 A2 EP 1127522A2
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EP
European Patent Office
Prior art keywords
spring
gas
spiral
spring unit
chair
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP01104641A
Other languages
German (de)
French (fr)
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EP1127522B1 (en
EP1127522A3 (en
Inventor
Rolf Scholz
Frank Weisser
Armin Sander
Martin Potrykus
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Koenig and Neurath AG
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Koenig and Neurath AG
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Publication of EP1127522A2 publication Critical patent/EP1127522A2/en
Publication of EP1127522A3 publication Critical patent/EP1127522A3/en
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Publication of EP1127522B1 publication Critical patent/EP1127522B1/en
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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
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/446—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with fluid 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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/443—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with coil springs

Definitions

  • the invention relates to a spring unit for adjusting the weight of a chair, in particular an office chair, with a first spring element and with at least another spring element.
  • the setting is under Weight setting the counterforce to be applied by the spring unit to the weight of the understood the person using the chair.
  • the bias of the effective as a compression spring Coil spring manually by means of a coupled with a sleeve-like driver Rotary knob set is held in the prestressed state.
  • the coil spring serving as a compression spring often to an undesirably high degree and / or over an impermissibly long period Period is held in the prestressed state.
  • an undesirably high expenditure of force a large number of revolutions of the rotary knob for weight adjustment is required, so that when in the Usually poor posture due to the often poor accessibility the knob is very tedious.
  • the invention is therefore based on the object of a spring unit at the beginning Specify the type mentioned, avoiding the disadvantages mentioned particularly suitable weight or force setting of a chair over a force range as large as possible.
  • the spring unit is intended in particular for an easy to handle weight adjustment of a z. B. with a synchronous mechanism for the inclination adjustment of an office chair provided with a backrest-seat unit be suitable.
  • the spring unit are the first spring element, which is preferably a gas spring is, a number of further spring elements individually or in stages in combination switchable. This is depending on the set weight - and therefore dependent from the counterforce to be applied by the spring unit to the weight force effective for gas spring at least one of the other spring elements.
  • Both the gas spring and the connected spring elements are the first when loaded, d. H. if a pressure or weight force on the spring unit is exercised, effective. In other words: when the spring unit is not loaded in particular none of the connected spring elements are biased.
  • both the first spring element as well as the or each additional spring element a gas spring.
  • the gas springs are common on the one hand with their spring ends on the housing side held.
  • the piston-side spring ends are then expediently individual or can be brought into active engagement in combination with an adjustment link.
  • the Gas springs of the spring unit can be in a row as well as in a circle be arranged side by side.
  • the adjustment link can be a perforated slide or be designed as a perforated, rotatable disc. Both the pusher as well as the perforated disc can be provided with a locking mechanism his. The slide or the disc locks in different positions such that the inactivated gas springs with their piston ends slide through the holes aligned with them when on the spring unit a weight acts.
  • the or each additional spring element a spiral spring coaxially surrounding the gas spring. It is convenient a first spiral spring surrounding the gas spring and one surrounding it second coil spring is provided, between which a spacer sleeve is arranged can be.
  • the inner first coil spring is preferably weaker than the outer second coil spring.
  • the spring unit is particularly suitable for adjusting the weight of an office chair with a synchronous mechanism to adjust the inclination of the backrest or this in one unit with the seat.
  • the spring unit is expedient between a seat support connected to a rotating column and the seat arranged.
  • the spring unit can also be between the seat support and an at least approximately parallel to the seat or the seat surface Backrest links of the backrest can be arranged.
  • Fig. 1 shows a chair 1 with a so-called synchronous mechanism for tilt adjustment a backrest 2, which has a below a seat or a seat 3 at least approximately parallel to this backrest link 4 is connected to a bogie 5.
  • the backrest link 4 approximately in the area of the front edge of the seat 3 via a swivel 6 with a Seat support 7 articulated, which in turn with a rotating column 8 of the bogie 5 is firmly connected.
  • the bogie 5 has e.g. star-shaped Frame base 9 with rollers 10 attached at the end.
  • the spring unit 11 provided is on the housing side on the seat support 7 and on the piston side held on the backrest arm 4 rotatably or pivotally.
  • FIGS 2a to 2d show a preferred embodiment of the spring unit 11 in different weight or counterforce settings.
  • the spring unit 11 comprises a gas spring 12, with its housing-side holding or spring end 12a is attached to a holding element 13. Within a pressure housing 14 the gas spring 12 is in a manner not shown with the end a piston connected piston rod 15 axially movable. The gas spring 12 is guided with its piston-side spring end 12b into an adjusting link 16 and biased by this in the position shown.
  • Adjacent to this gas spring 12 are three further spring elements 17, 18, 19 in Form in turn each arranged a gas spring.
  • the other gas springs 17 to 19 are also at their housing-side spring ends 17a, 18a and 19a attached to the holding member 13.
  • the further spring elements 17 to 19 are also with their piston-side spring ends 17b, 18b and 19b to the adjusting link 16 guided.
  • the other spring elements 17 to 19 are not connected to the gas spring 12 by the fact that their piston rods 20, 21, 22 are passed through through holes or openings 23, 24 and 25 provided in the adjustment link 16.
  • the further spring elements 17 to 19 are therefore not preloaded.
  • the basic setting corresponds, for example, to a weight of 50 kg of a person occupying the chair 1, so that the counterforce F G of the spring unit 11 to be applied only by the gas spring 12 and counteracts the weight of the person in this example is 50 kN.
  • the further spring elements 17 can be used for weight adjustment or adjustment to 19 of the gas spring 12 can be switched on individually or in combination.
  • the pistons 20, 22 of the spring elements 17 and 19 are unblocked through the corresponding through openings 23 and 25 of the adjustment link passed through.
  • the spring elements 17 to 19 are connected to the gas spring 12 individually or in a corresponding combination. A continuous and thus inevitably time-consuming and complex weight adjustment is thus avoided in a simple manner.
  • FIGS. 3a to 3e show a further embodiment of the spring unit 11, again with a central gas spring 12 for the basic setting of the counterforce F G, and with two further spring elements. These are designed in the form of two spiral springs 27 and 28 coaxially surrounding the gas spring 12, the inner first spiral spring 27 being weaker than the outer second spiral spring 28. While the inner spiral spring 27 is guided by the pressure housing 14 of the gas spring 12, the outer one Spiral spring 28 guided by a positioning and spacing sleeve 29 provided between the two spiral springs 27 and 28. The sleeve 29 also serves as a spacer between the two coil springs 27 and 28.
  • the piston rod 15 is the gas spring 12 guided at the end to a cross arm 30, on its cross to the longitudinal axis of the spring 26 extending leg arms 30a and 30b each have a stamp arm 31a and 31b of an adjusting plunger 31 are arranged displaceably.
  • stamp arms 31a and 31b articulated lever arms 32a and 32b are at the end in a common this elongated hole 33 that provided in the cross arm 30 is.
  • the punch arms 31a and 31b take one with the outer coil spring 28 aligned operative position (Fig. 3a and 3b), one aligned with the inner coil spring Active position (Fig. 3c), one in alignment with both coil springs 27 and 28 Active position (Fig. 3d) or one laterally protruding with both spiral springs 27 and 28 Active position (Fig. 3e).

Abstract

The spring unit for adjusting the support of a user's weight on an office chair comprises a main spring (12) and several auxiliary springs (17 - 19). All the springs are mounted on a connecting bar (13) at their bases and a slide (16) at the top allows the auxiliary springs to be individually or collectively linked with the main spring. An Independent claim is included for a chair incorporating the spring unit.

Description

Die Erfindung betrifft eine Federeinheit zur Gewichtseinstellung eines Stuhls, insbesondere eines Bürostuhls, mit einem ersten Federelement und mit mindestens einem weiteren Federelement. Unter Gewichtseinstellung wird hierbei die Einstellung der von der Federeinheit aufzubringenden Gegenkraft zur Gewichtskraft der den Stuhl benutzenden Person verstanden.The invention relates to a spring unit for adjusting the weight of a chair, in particular an office chair, with a first spring element and with at least another spring element. The setting is under Weight setting the counterforce to be applied by the spring unit to the weight of the understood the person using the chair.

Aus der DE 38 34 614 A1 ist es bekannt, zur Gewichtseinstellung eines Stuhls eine Federeinheit mit einer Gasfeder und einer diese koaxial umgebenden Spiralfeder vorzusehen, die von der an einem Ende drehbeweglich am Stuhlgestell gehaltenen Gasfeder getragen ist. Der Aufbau und die Wirkungsweise einer derartigen Gasfeder ist beispielsweise in der DE 42 37 495 A1 beschrieben.From DE 38 34 614 A1 it is known for weight adjustment of a chair a spring unit with a gas spring and a spiral spring surrounding it coaxially to be provided by the one at one end rotatable on the chair frame held gas spring is worn. The structure and operation of such Gas spring is described for example in DE 42 37 495 A1.

Bei der bekannten Federeinheit wird die Vorspannung der als Druckfeder wirksamen Spiralfeder manuell mittels eines mit einem hülsenartigen Mitnehmer gekoppelten Drehknopfes eingestellt. Nachteilig dabei ist, dass einerseits, insbesondere bei dauerhaft maximaler Gewichtseinstellung, die als Druckfeder dienende Spiralfeder häufig in unerwünscht hohem Maße und/oder über einen unzulässig langen Zeitraum im vorgespannten Zustand gehalten ist. Andererseits sind bei gleichzeitig unerwünscht hoher Kraftaufwendung eine Vielzahl von Umdrehungen des Drehknopfes zur Gewichtseinstellung erforderlich, so dass diese bei in der Regel ungünstiger Körperhaltung aufgrund der häufig schlechten Zugänglichkeit des Drehknopfes sehr langwierig ist.In the known spring unit, the bias of the effective as a compression spring Coil spring manually by means of a coupled with a sleeve-like driver Rotary knob set. The disadvantage here is that on the one hand, in particular with permanent maximum weight setting, the coil spring serving as a compression spring often to an undesirably high degree and / or over an impermissibly long period Period is held in the prestressed state. On the other hand, at at the same time an undesirably high expenditure of force a large number of revolutions of the rotary knob for weight adjustment is required, so that when in the Usually poor posture due to the often poor accessibility the knob is very tedious.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Federeinheit der eingangs genannten Art anzugeben, die unter Vermeidung der genannten Nachteile eine besonders geeignete Gewichts- oder Krafteinstellung eines Stuhls über einen möglichst großen Kraftbereich ermöglicht. Die Federeinheit soll insbesondere für eine einfach handhabbare Gewichtseinstellung eines z. B. mit einer Synchronmechanik zur Neigungsverstellung einer Rückenlehnen-Sitz-Einheit versehenen Bürostuhls geeignet sein.The invention is therefore based on the object of a spring unit at the beginning Specify the type mentioned, avoiding the disadvantages mentioned particularly suitable weight or force setting of a chair over a force range as large as possible. The spring unit is intended in particular for an easy to handle weight adjustment of a z. B. with a synchronous mechanism for the inclination adjustment of an office chair provided with a backrest-seat unit be suitable.

Diese Aufgabe wird erfindungsgemäß gelöst durch die Merkmale des Anspruchs 1. Dazu ist vorgesehen, dass in einer Grundeinstellung, vorzugsweise für eine von der Federeinheit aufzubringenden Mindest-Gegenkraft zur Gewichtskraft, lediglich das erste Federelement wirksam ist. Zur einstellbaren Erhöhung der Gegenkraft der Federeinheit sind dem ersten Federelement, das vorzugsweise eine Gasfeder ist, eine Anzahl weiterer Federelemente einzeln oder in Kombination stufenweise zuschaltbar. Dadurch ist je nach eingestelltem Gewicht - und damit in Abhängigkeit von der von der Federeinheit aufzubringenden Gegenkraft zur Gewichtskraftzusätzlich zur Gasfeder mindestens eines der weiteren Federelemente wirksam. Dabei sind sowohl die Gasfeder als auch die zugeschalteten Federelemente erst bei Belastung, d. h. wenn auf die Federeinheit eine Druck- oder Gewichtskraft ausgeübt wird, wirksam. Mit anderen Worten: Bei nicht belasteter Federeinheit ist insbesondere keines der zugeschalteten Federelemente vorgespannt.This object is achieved according to the invention by the features of the claim 1. For this purpose it is provided that in a basic setting, preferably for one of the minimum counterforce to the weight force to be applied, only the first spring element is effective. For adjustable increase of the counterforce the spring unit are the first spring element, which is preferably a gas spring is, a number of further spring elements individually or in stages in combination switchable. This is depending on the set weight - and therefore dependent from the counterforce to be applied by the spring unit to the weight force effective for gas spring at least one of the other spring elements. Both the gas spring and the connected spring elements are the first when loaded, d. H. if a pressure or weight force on the spring unit is exercised, effective. In other words: when the spring unit is not loaded in particular none of the connected spring elements are biased.

In einer vorteilhaften Ausgestaltung der Federeinheit ist sowohl das erste Federelement als auch das oder jedes weitere Federelement eine Gasfeder. Dabei sind die Gasfedern einerseits mit deren gehäuseseitigen Federenden gemeinsam gehalten. Deren kolbenseitigen Federenden sind dann zweckmäßigerweise einzeln oder in Kombination mit einer Verstellkulisse in Wirkeingriff bringbar. Die Gasfedern der Federeinheit können dabei sowohl in einer Reihe als auch im Kreis nebeneinander angeordnet sein. Die Verstellkulisse kann als gelochter Schieber oder als gelochte, drehbewegliche Scheibe ausgeführt sein. Sowohl der Lochschieber als auch die Lochscheibe können mit einem Rastmechanismus versehen sein. Dabei rastet der Schieber bzw. die Scheibe in verschiedenen Stellungen derart ein, dass die jeweils inaktivierten Gasfedern mit deren kolbenseitigen Enden durch die mit diesen fluchtenden Löcher hindurchgleiten, wenn auf die Federeinheit eine Gewichtskraft wirkt. In an advantageous embodiment of the spring unit, both the first spring element as well as the or each additional spring element a gas spring. there the gas springs are common on the one hand with their spring ends on the housing side held. The piston-side spring ends are then expediently individual or can be brought into active engagement in combination with an adjustment link. The Gas springs of the spring unit can be in a row as well as in a circle be arranged side by side. The adjustment link can be a perforated slide or be designed as a perforated, rotatable disc. Both the pusher as well as the perforated disc can be provided with a locking mechanism his. The slide or the disc locks in different positions such that the inactivated gas springs with their piston ends slide through the holes aligned with them when on the spring unit a weight acts.

In einer alternativen Ausführungsform ist das oder jedes weitere Federelement eine die Gasfeder koaxial umgebende Spiralfeder. Dabei sind zweckmäßigerweise eine die Gasfeder umgebende erste Spiralfeder und eine diese umgebende zweite Spiralfeder vorgesehen, zwischen denen eine Distanzhülse angeordnet sein kann. Die innenliegende erste Spiralfeder ist dabei vorzugsweise schwächer als die außenliegende zweite Spiralfeder.In an alternative embodiment, the or each additional spring element a spiral spring coaxially surrounding the gas spring. It is convenient a first spiral spring surrounding the gas spring and one surrounding it second coil spring is provided, between which a spacer sleeve is arranged can be. The inner first coil spring is preferably weaker than the outer second coil spring.

Zum Zuschalten der Spiralfedern zu der Gasfeder ist deren bewegliches Kolbenende an einen Kreuzarm geführt, an dem zwei Stempelarme quer zur Federachse synchron verschiebbar angeordnet sind. Je nach eingestellter Position der Stempelarme gleiten diese entweder an der außenliegenden Spiralfeder vorbei - wobei dann lediglich die Gasfeder wirksam ist - oder sind in einer Wirkposition mit der außenliegenden Spiralfeder, mit der innenliegenden Spiralfeder oder mit beiden Spiralfedern.To connect the coil springs to the gas spring is its movable piston end led to a cross arm on which two punch arms transverse to the spring axis are arranged synchronously displaceable. Depending on the position of the stamp arms they either slide past the external coil spring - whereby then only the gas spring is effective - or are in an active position with the external coil spring, with the internal coil spring or with both Coil springs.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, dass durch den Einsatz einer Federeinheit mit zweckmäßigerweise einer Gasfeder als erstes Federelement zur Gewichtsgrundeinstellung und mit einer Anzahl weiterer Federelementen, die der Gasfeder einzeln oder in Kombination zuschaltbar sind, eine stufenweise Einstellung der Gegenkraft der Federeinheit und damit eine stufenweise Gewichtseinstellung eines Stuhls in besonders einfacher Art und Weise möglich ist.The advantages achieved with the invention are in particular that the use of a spring unit with expediently a gas spring as the first Spring element for basic weight adjustment and with a number of additional spring elements, which can be activated individually or in combination, one gradual adjustment of the counterforce of the spring unit and thus a gradual Adjusting the weight of a chair in a particularly simple manner is possible.

Die Federeinheit eignet sich besonders zur Gewichtseinstellung eines Bürostuhls mit einer Synchronmechanik zur Neigungsverstellung der Rückenlehne oder dieser in einer Einheit mit dem Sitz. In dieser Anwendung ist die Federeinheit zweckmäßigerweise zwischen einem mit einer Drehsäule verbundenen Sitzträger und dem Sitz angeordnet. Alternativ kann die Federeinheit auch zwischen dem Sitzträger und einem zumindest annähernd parallel zum Sitz oder zur Sitzfläche verlaufenden Lehnenlenker der Rückenlehne angeordnet sein. The spring unit is particularly suitable for adjusting the weight of an office chair with a synchronous mechanism to adjust the inclination of the backrest or this in one unit with the seat. In this application the spring unit is expedient between a seat support connected to a rotating column and the seat arranged. Alternatively, the spring unit can also be between the seat support and an at least approximately parallel to the seat or the seat surface Backrest links of the backrest can be arranged.

Nachfolgend werden Ausführungsbeispiele der Erfindung anhand einer Zeichnung näher erläutert. Darin zeigen:

Fig. 1
in einer Seitenansicht einen Bürostuhl mit einer erfindungsgemäßen Federeinheit zur Gewichtseinstellung als Teil einer Synchronmechanik eines Bürostuhls,
Fig. 2a-d
eine erste Variante der Federeinheit mit einer ersten Gasfeder, der eine zweite, eine dritte bzw. eine vierte Gasfeder zugeschaltet ist, und
Fig. 3a-e
eine zweite Ausführungsform der Federeinheit mit einer zentralen Gasfeder und zwei diese koaxial umgebenden Spiralfedern, von denen die außenliegende, die innenliegende, beide bzw. keine Spiralfeder zugeschaltet ist.
Exemplary embodiments of the invention are explained in more detail below with reference to a drawing. In it show:
Fig. 1
in a side view an office chair with a spring unit according to the invention for weight adjustment as part of a synchronous mechanism of an office chair,
2a-d
a first variant of the spring unit with a first gas spring, which is connected to a second, a third or a fourth gas spring, and
3a-e
a second embodiment of the spring unit with a central gas spring and two spiral springs surrounding it coaxially, of which the outer, the inner, both or no spiral spring is switched on.

Einander entsprechende Teile sind in allen Figuren mit den gleichen Bezugszeichen versehen.Corresponding parts are given the same reference numerals in all figures Mistake.

Fig. 1 zeigt einen Stuhl 1 mit einer sogenannten Synchronmechanik zur Neigungsverstellung einer Rückenlehne 2, die über einen unterhalb einer Sitzfläche oder eines Sitzes 3 zumindest annähernd parallel zu diesem verlaufenden Lehnenlenker 4 mit einem Drehgestell 5 verbunden ist. Dazu ist der Lehnenlenker 4 etwa im Bereich der Vorderkante des Sitzes 3 über ein Drehgelenk 6 mit einem Sitzträger 7 gelenkig verbunden, der seinerseits mit einer Drehsäule 8 des Drehgestells 5 fest verbunden ist. Das Drehgestell 5 weist einen z.B. sternförmigen Gestellfuß 9 mit endseitig befestigten Rollen 10 auf. Eine zur Gewichtseinstellung vorgesehene Federeinheit 11 ist gehäuseseitig am Sitzträger 7 und kolbenseitig am Lehnenlenker 4 dreh- oder schwenkbeweglich gehalten.Fig. 1 shows a chair 1 with a so-called synchronous mechanism for tilt adjustment a backrest 2, which has a below a seat or a seat 3 at least approximately parallel to this backrest link 4 is connected to a bogie 5. To do this, the backrest link 4 approximately in the area of the front edge of the seat 3 via a swivel 6 with a Seat support 7 articulated, which in turn with a rotating column 8 of the bogie 5 is firmly connected. The bogie 5 has e.g. star-shaped Frame base 9 with rollers 10 attached at the end. One for weight adjustment The spring unit 11 provided is on the housing side on the seat support 7 and on the piston side held on the backrest arm 4 rotatably or pivotally.

Die Figuren 2a bis 2d zeigen eine bevorzugte Ausführungsform der Federeinheit 11 in verschiedenen Gewichts- oder Gegenkrafteinstellungen. Die Federeinheit 11 umfasst eine Gasfeder 12, die mit ihrem gehäuseseitigen Halte- oder Federende 12a an einem Halteelement 13 befestigt ist. Innerhalb eines Druckgehäuses 14 der Gasfeder 12 ist eine in nicht näher dargestellter Art und Weise endseitig mit einem Kolben verbundene Kolbenstange 15 axial beweglich geführt. Die Gasfeder 12 ist mit ihrem kolbenseitigen Federende 12b in eine Verstellkulisse 16 geführt und mittels dieser in der dargestellten Position vorgespannt.Figures 2a to 2d show a preferred embodiment of the spring unit 11 in different weight or counterforce settings. The spring unit 11 comprises a gas spring 12, with its housing-side holding or spring end 12a is attached to a holding element 13. Within a pressure housing 14 the gas spring 12 is in a manner not shown with the end a piston connected piston rod 15 axially movable. The gas spring 12 is guided with its piston-side spring end 12b into an adjusting link 16 and biased by this in the position shown.

Benachbart zu dieser Gasfeder 12 sind drei weitere Federelemente 17,18,19 in Form wiederum jeweils einer Gasfeder angeordnet. Die weiteren Gasfedern 17 bis 19 sind ebenfalls mit deren gehäuseseitigen Federenden 17a,18a bzw. 19a an dem Halteelement 13 befestigt. Auch sind die weiteren Federelemente 17 bis 19 mit deren kolbenseitigen Federenden 17b,18b bzw. 19b an die Verstellkulisse 16 geführt.Adjacent to this gas spring 12 are three further spring elements 17, 18, 19 in Form in turn each arranged a gas spring. The other gas springs 17 to 19 are also at their housing-side spring ends 17a, 18a and 19a attached to the holding member 13. The further spring elements 17 to 19 are also with their piston-side spring ends 17b, 18b and 19b to the adjusting link 16 guided.

In der in Figur 2a dargestellten Grundeinstellung sind der Gasfeder 12 die weiteren Federelemente 17 bis 19 nicht zugeschaltet, indem deren Kolbenstangen 20,21,22 durch in der Verstellkulisse 16 vorgesehene Durchgangslöcher oder- öffnungen 23,24 bzw. 25 hindurchgeführt sind. In dieser Grundeinstellung sind somit die weiteren Federelemente 17 bis 19 nicht vorgespannt. Die Grundeinstellung entspricht beispielsweise einem Gewicht von 50kg einer den Stuhl 1 besetzenden Person, so dass die lediglich von der Gasfeder 12 aufzubringende, der Gewichtskraft der Person entgegenwirkende Gegenkraft FG der Federeinheit 11 in diesem Beispiel 50kN beträgt.In the basic setting shown in FIG. 2a, the other spring elements 17 to 19 are not connected to the gas spring 12 by the fact that their piston rods 20, 21, 22 are passed through through holes or openings 23, 24 and 25 provided in the adjustment link 16. In this basic setting, the further spring elements 17 to 19 are therefore not preloaded. The basic setting corresponds, for example, to a weight of 50 kg of a person occupying the chair 1, so that the counterforce F G of the spring unit 11 to be applied only by the gas spring 12 and counteracts the weight of the person in this example is 50 kN.

Zur Gewichtseinstellung oder -verstellung können die weiteren Federelemente 17 bis 19 der Gasfeder 12 einzeln oder in Kombination zugeschaltet werden. Dazu wird die Verstellkulisse 16 ― im Ausführungsbeispiel quer zur Federlängsachse 26 ― manuell verstellt, z. B. verschoben oder verdrahtet. So sind in den Figuren 2b bis 2c der Gasfeder 12 das Federelement 18, das Federelement 19 bzw. zusätzlich das Federelement 17 durch entsprechende Verstellung der Verstellkulisse 16 zugeschaltet. Die Kolben 20,22 der Federelemente 17 bzw. 19 sind dabei unblokkiert durch die entsprechenden Durchgangsöffnungen 23 bzw. 25 der Verstellkulisse hindurchgeführt. The further spring elements 17 can be used for weight adjustment or adjustment to 19 of the gas spring 12 can be switched on individually or in combination. To becomes the adjustment link 16 - in the exemplary embodiment transverse to the longitudinal spring axis 26 - manually adjusted, e.g. B. moved or wired. So in Figures 2b to 2c of the gas spring 12, the spring element 18, the spring element 19 or additionally the spring element 17 by appropriate adjustment of the adjusting link 16 switched on. The pistons 20, 22 of the spring elements 17 and 19 are unblocked through the corresponding through openings 23 and 25 of the adjustment link passed through.

Bei einer Feder- oder Gegenkraft F1,F2 und F3 (Fig. 3e) der weiteren Federelemente 17,18,19 von z.B. 10kN, 20kN und 40kN kann somit die Gegenkraft F in 10kN-Schritten von F = 50kN bis F = 120kN stufenweise und somit zeitsparend eingestellt werden. Dazu werden der Gasfeder 12 die Federelemente 17 bis 19 einzeln oder in entsprechender Kombination zugeschaltet. Eine kontinuierliche und damit zwangsläufig zeitintensive sowie aufwendige Gewichtseinstellung ist damit in einfacher Art und Weise vermieden.With a spring or counterforce F 1 , F 2 and F 3 (FIG. 3e) of the further spring elements 17, 18, 19 of, for example, 10 kN, 20 kN and 40 kN, the counter force F can thus be in 10 kN steps from F = 50 kN to F = 120kN can be set gradually and thus saves time. For this purpose, the spring elements 17 to 19 are connected to the gas spring 12 individually or in a corresponding combination. A continuous and thus inevitably time-consuming and complex weight adjustment is thus avoided in a simple manner.

Die Figuren 3a bis 3e zeigen eine weitere Ausführungsform der Federeinheit 11 mit wiederum einer zentralen Gasfeder 12 für die Grundeinstellung der Gegenkraft FG sowie mit zwei weiteren Federelementen. Diese sind in Form von zwei die Gasfeder 12 koaxial umgebenden Spiralfedern 27 und 28 ausgeführt, wobei die innenliegende erste Spiralfeder 27 schwächer ausgeführt ist als die außenliegende zweite Spiralfeder 28. Während die innenliegende Spiralfeder 27 vom Druckgehäuse 14 der Gasfeder 12 geführt wird, wird die außenliegende Spiralfeder 28 von einer zwischen den beiden Spiralfedern 27 und 28 vorgesehenen Positionier- und Distanzhülse 29 geführt. Die Hülse 29 dient dabei gleichzeitig als Abstandshalter zwischen den beiden Spiralfedern 27 und 28.FIGS. 3a to 3e show a further embodiment of the spring unit 11, again with a central gas spring 12 for the basic setting of the counterforce F G, and with two further spring elements. These are designed in the form of two spiral springs 27 and 28 coaxially surrounding the gas spring 12, the inner first spiral spring 27 being weaker than the outer second spiral spring 28. While the inner spiral spring 27 is guided by the pressure housing 14 of the gas spring 12, the outer one Spiral spring 28 guided by a positioning and spacing sleeve 29 provided between the two spiral springs 27 and 28. The sleeve 29 also serves as a spacer between the two coil springs 27 and 28.

Bei dieser Ausführungsform der Federeinheit 11 ist die Kolbenstange 15 der Gasfeder 12 endseitig an einen Kreuzarm 30 geführt, auf dessen quer zur Federlängsachse 26 verlaufenden Schenkelarmen 30a und 30b jeweils ein Stempelarm 31a bzw. 31b eines Verstellstempels 31 verschiebbar angeordnet sind. An die Stempelarme 31a und 31b angelenkte Hebelarme 32a bzw. 32b sind endseitig in ein diesen gemeinsames Langloch 33 geführt, dass im Kreuzarm 30 vorgesehen ist. Je nach Stellung der Hebelarme 32a und 32b innerhalb des Langlochs 33 nehmen die Stempelarme 31a und 31b eine mit der äußeren Spiralfeder 28 fluchtende Wirkposition (Fig. 3a und 3b), eine mit der inneren Spiralfeder fluchtende Wirkposition (Fig. 3c), eine mit beiden Spiralfedern 27 und 28 fluchtende Wirkposition (Fig. 3d) oder eine mit beiden Spiralfedern 27 und 28 seitlich überragende Wirkposition (Fig. 3e) ein. In this embodiment of the spring unit 11, the piston rod 15 is the gas spring 12 guided at the end to a cross arm 30, on its cross to the longitudinal axis of the spring 26 extending leg arms 30a and 30b each have a stamp arm 31a and 31b of an adjusting plunger 31 are arranged displaceably. To the Stamp arms 31a and 31b articulated lever arms 32a and 32b are at the end in a common this elongated hole 33 that provided in the cross arm 30 is. Depending on the position of the lever arms 32a and 32b within the elongated hole 33 the punch arms 31a and 31b take one with the outer coil spring 28 aligned operative position (Fig. 3a and 3b), one aligned with the inner coil spring Active position (Fig. 3c), one in alignment with both coil springs 27 and 28 Active position (Fig. 3d) or one laterally protruding with both spiral springs 27 and 28 Active position (Fig. 3e).

In der letztgenannten Wirkposition gemäß Fig. 3e ist der Gasfeder 12 keine der beiden Spiralfedern 27,18 zugeschaltet. In dieser Wirkposition gleiten die Stempelarme 30,31a und 31b an der außenliegenden Spiralfeder 28 ohne Wirkeingriff mit dieser oder mit der innenliegenden Spiralfeder 27 vorbei, so dass die Spiralfedern 27,28 weder im belasteten noch im unbelasteten Zustand der Federeinheit 11 vorgespannt sind. Diese Verstell- oder Kulisseneinstellung entspricht der Grundeinstellung der Federeinheit 11 mit einer Gegenkraft FG von z.B. 50kN, was einer Gewichtseinstellung von 50kg entspricht.In the latter active position according to FIG. 3e, the gas spring 12 is not connected to either of the two spiral springs 27, 18. In this operative position, the plunger arms 30, 31a and 31b slide past the outer spiral spring 28 without active engagement with this or with the inner spiral spring 27, so that the spiral springs 27, 28 are biased neither in the loaded nor in the unloaded state of the spring unit 11. This adjustment or link setting corresponds to the basic setting of the spring unit 11 with a counterforce F G of, for example, 50 kN, which corresponds to a weight setting of 50 kg.

Bei der in Fig. 3a dargestellten Wirkposition der Stempel- oder Verstellanordnung 30,31,32 ist lediglich die außenliegende Spiralfeder 28 der Gasfeder 12 zugeschaltet. Wirksam wird die außenliegende Spiralfeder 28 jedoch erst dann, wenn die Federeinheit 11 belastet wird. In diesem aus Fig. 3b ersichtlichen Belastungszustand der Federeinheit 11 ist der Gasfeder 12 mit der außenliegenden Spiralfeder 28 eine zusätzliche Gegenkraft F' 1 von z. B. 30kN zugeschaltet. Dies würde einer Gewichtseinstellung von 80kg entsprechen. Im entlasteten Zustand (Fig. 3a) ist die außenliegende Spiralfeder 28 ebenso wie die Gasfeder 12 ungespannt und somit inaktiv.In the operative position of the stamping or adjusting arrangement 30, 31, 32 shown in FIG. 3a, only the external spiral spring 28 of the gas spring 12 is switched on. However, the external spiral spring 28 only becomes effective when the spring unit 11 is loaded. In this load state of the spring unit 11 shown in FIG. 3b, the gas spring 12 with the external spiral spring 28 is an additional counterforce F ' 1 of z. B. switched on 30kN. This would correspond to a weight setting of 80kg. In the relieved state (FIG. 3a), the external coil spring 28, like the gas spring 12, is not under tension and is therefore inactive.

Bei der in Fig. 3c dargestellten Wirkposition der Verstell- oder Stempelanordnung 30,31,32 ist analog zu Fig. 3a lediglich die innenliegende, vergleichsweise schwache Spiralfeder 27 der Gasfeder 12 zugeschaltet. Im Belastungszustand der Federeinheit 11 ist der Gasfeder 12 mit der innenliegenden Spiralfeder 27 eine zusätzliche Gegenkraft F' 2 von z. B. 20kN zugeschaltet, was einer Gewichtseinstellung von 70kg entsprechen würde. Auch hier ist die innenliegende Spiralfeder 27 in dem dargestellten unbelasteten Zustand der Federeinheit 11 nicht vorgespannt. Demgegenüber sind bei der in Fig. 3d dargestellten Wirkposition der Stempel- oder Verstellanordnung 30,31,32 sowohl die außenliegende Spiralfeder 28 als auch die innenliegende Spiralfeder 27 der Gasfeder 12 zugeschaltet. Dies entspricht einer Gewichtseinstellung von 100kg. In the operative position of the adjusting or punch arrangement 30, 31, 32 shown in FIG. 3 c, only the internal, comparatively weak spiral spring 27 of the gas spring 12 is switched on analogously to FIG. 3 a. In the loaded state of the spring unit 11, the gas spring 12 with the internal coil spring 27 is an additional counterforce F ' 2 of z. B. 20kN switched on, which would correspond to a weight setting of 70kg. Here, too, the internal coil spring 27 is not preloaded in the illustrated unloaded state of the spring unit 11. In contrast, both the external coil spring 28 and the internal coil spring 27 of the gas spring 12 are switched on in the operative position of the stamping or adjusting arrangement 30, 31, 32 shown in FIG. 3d. This corresponds to a weight setting of 100kg.

BezugszeichenlisteReference list

11
Stuhlchair
22nd
Rückenlehnebackrest
33rd
Sitz/-flächeSeat / surface
44th
LehnenlenkerBackrest handlebar
55
Drehgestellbogie
66
DrehgelenkSwivel
77
SitzträgerSeat support
88th
DrehsäuleRotating column
99
GestellfußFrame foot
1010th
Rollerole
1111
FedereinheitSpring unit
1212th
GasfederGas spring
1313
HalteelementHolding element
1414
DruckgehäusePressure housing
1515
KolbenstangePiston rod
1616
VerstellkulisseAdjustment link
17-1917-19
Federelement/GasfederSpring element / gas spring
20-2220-22
KolbenstangePiston rod
23-2523-25
DurchgangsöffnungThrough opening
2626
FederlängsachseLongitudinal spring axis
27,2827.28
Federelement/SpiralfederSpring element / spiral spring
2929
Positionier-/DistanzhülsePositioning / spacer sleeve
3030th
KreuzarmCross arm
30a,b30a, b
SchenkelarmThigh arm
3131
VerstellstempelAdjustment stamp
31a,b31a, b
StempelarmStamp arm
32a,b32a, b
HebelarmLever arm
3333
LanglochLong hole

Claims (11)

Federeinheit zur Gewichsteinstellung eines Stuhls (1), insbesondere eines Bürostuhls, mit einem ersten Federelement (12) und mit mindestens einem weiteren Federelement (17,18,19;27,28),
   dadurch gekennzeichnet,
dass jedes weitere Federelement (17,18,19;27,28) dem ersten Federelement (12) zuschaltbar ist.Spring unit for weight adjustment of a chair (1), in particular an office chair, with a first spring element (12) and with at least one further spring element (17, 18, 19; 27, 28),
characterized,
that each additional spring element (17, 18, 19; 27, 28) can be connected to the first spring element (12). Federeinheit nach Anspruch 1,
   dadurch gekennzeichnet,
dass dem ersten Federelement (12) mindestens zwei weitere Federelemente (17,18,19;27,28) sowohl einzeln als auch in Kombination zuschaltbar sind.Spring unit according to claim 1,
characterized,
that at least two further spring elements (17, 18, 19; 27, 28) can be connected to the first spring element (12) both individually and in combination. Federeinheit nach Anspruch 1 oder 2,
   dadurch gekennzeichnet,
dass das erste Federelement (12) eine Gasfeder ist.Spring unit according to claim 1 or 2,
characterized,
that the first spring element (12) is a gas spring. Federeinheit nach einem der Ansprüche 1 bis 3,
   dadurch gekennzeichnet,
dass das oder jedes weitere Federelement (17,18,19) eine Gasfeder ist.Spring unit according to one of claims 1 to 3,
characterized,
that the or each further spring element (17, 18, 19) is a gas spring. Federeinheit nach Anspruch 4,
   dadurch gekennzeichnet,
dass die Gasfedern (17,18,19) mit deren gehäuseseitigen Federenden (17a,18a,19a) an einem gemeinsamen Halteelement (13) gehalten sind, und dass deren kolbenseitigen Federenden (17b,18b,19b) mit einer Verstellkulisse (16) einzeln in Wirkeingriff bringbar sind. Spring unit according to claim 4,
characterized,
that the gas springs (17, 18, 19) with their housing-side spring ends (17a, 18a, 19a) are held on a common holding element (13), and that their piston-side spring ends (17b, 18b, 19b) with an adjusting link (16) individually can be brought into active engagement. Federeinheit nach Anspruch 3,
   dadurch gekennzeichnet,
dass das oder jedes weitere Federelement (27,28) eine die Gasfeder (12) koaxial umgebende Spiralfeder ist.Spring unit according to claim 3,
characterized,
that the or each further spring element (27, 28) is a spiral spring surrounding the gas spring (12) coaxially. Federeinheit nach Anspruch 6,
   dadurch gekennzeichnet,
dass eine die Gasfeder (12) umgebende erste Spiralfedern (27) und eine diese umgebende zweite Spiralfeder (28) vorgesehen sind, wobei die innenliegende erste Spiralfeder (27) schwächer ist als die außenliegende zweite Spiralfeder (28).Spring unit according to claim 6,
characterized,
that a first spiral spring (27) surrounding the gas spring (12) and a second spiral spring (28) surrounding it are provided, the inner first spiral spring (27) being weaker than the outer second spiral spring (28). Federeinheit nach Anspruch 7,
   dadurch gekennzeichnet,
dass zwischen der innenliegenden ersten Spiralfeder (27) und der außenliegenden zweiten Spiralfeder (28) eine Hülse (29) vorgesehen ist.Spring unit according to claim 7,
characterized,
that a sleeve (29) is provided between the inner first spiral spring (27) and the outer second spiral spring (28). Federeinheit nach einem der Ansprüche 6 bis 8,
   dadurch gekennzeichnet,
dass die Gasfeder (12) kolbenseitig an einen Kreuzarm (30) geführt ist, an dem zwei quer zur Federlängsachse (26) synchron verschiebbare und dabei in eine Wirkposition mit jeder Spiralfeder (27,28) bringbare Stempelarme (31a,31b) angeordnet sind.Spring unit according to one of claims 6 to 8,
characterized,
that the gas spring (12) is guided on the piston side to a cross arm (30) on which two stamp arms (31a, 31b) are arranged, which can be moved synchronously transversely to the longitudinal axis of the spring (26) and brought into an operative position with each spiral spring (27,28). Stuhl mit einer Federeinheit (11) nach einem der Ansprüche 1 bis 9.Chair with a spring unit (11) according to one of claims 1 to 9. Stuhl nach Anspruch 10, bei dem die Federeinheit (11) zwischen einem mit einer Drehsäule (8) verbundenen Sitzträger (7) und dem Sitz (3) oder einem zumindest annähernd parallel zu diesem verlaufenden Lehnenlenker (4) einer Rückenlehne (2) angeordnet ist.Chair according to claim 10, wherein the spring unit (11) between a with a rotating column (8) connected to the seat support (7) and the seat (3) or one at least approximately parallel to this backrest link (4) a backrest (2) is arranged.
EP01104641A 2000-02-23 2001-02-23 Spring unit for weight adjustment of a chair Expired - Lifetime EP1127522B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10008453 2000-02-23
DE10008453A DE10008453C2 (en) 2000-02-23 2000-02-23 Spring unit for weight adjustment of a chair
DE20003313U DE20003313U1 (en) 2000-02-23 2000-02-23 Spring unit for weight adjustment of a chair

Publications (3)

Publication Number Publication Date
EP1127522A2 true EP1127522A2 (en) 2001-08-29
EP1127522A3 EP1127522A3 (en) 2002-02-06
EP1127522B1 EP1127522B1 (en) 2004-12-22

Family

ID=44280722

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01104641A Expired - Lifetime EP1127522B1 (en) 2000-02-23 2001-02-23 Spring unit for weight adjustment of a chair

Country Status (4)

Country Link
US (1) US6659555B1 (en)
EP (1) EP1127522B1 (en)
AT (1) ATE285188T1 (en)
DE (2) DE20003313U1 (en)

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US9777111B2 (en) * 2005-10-20 2017-10-03 Grupo Petrotemex, S.A. De C.V. PET polymer with improved properties
DE202005017987U1 (en) * 2005-11-17 2006-01-12 Kintec-Solution Gmbh armchair
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GB0609315D0 (en) * 2006-05-11 2006-06-21 Technicon Internat Man Service Improved seat
CN106455821A (en) 2014-04-17 2017-02-22 Hni技术公司 Chair and chair control assemblies, systems, and methods
IT201700049605A1 (en) * 2017-05-08 2018-11-08 L I M A S N C Di Riccardo Ed Elisa Beccegato Mechanism for controlling the inclination force of a back of a chair

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Cited By (2)

* Cited by examiner, † Cited by third party
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US6796611B2 (en) 2002-09-07 2004-09-28 Bock-1 Gmbh & Co. Synchronizing mechanism for office chairs

Also Published As

Publication number Publication date
ATE285188T1 (en) 2005-01-15
US6659555B1 (en) 2003-12-09
DE10008453A1 (en) 2001-09-13
DE20003313U1 (en) 2001-07-05
EP1127522B1 (en) 2004-12-22
EP1127522A3 (en) 2002-02-06
DE10008453C2 (en) 2002-07-18

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