EP0995371A1 - Office-chair with a seat adjustable in inclination - Google Patents

Office-chair with a seat adjustable in inclination Download PDF

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Publication number
EP0995371A1
EP0995371A1 EP99120668A EP99120668A EP0995371A1 EP 0995371 A1 EP0995371 A1 EP 0995371A1 EP 99120668 A EP99120668 A EP 99120668A EP 99120668 A EP99120668 A EP 99120668A EP 0995371 A1 EP0995371 A1 EP 0995371A1
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EP
European Patent Office
Prior art keywords
rotary shaft
functional part
eccentric
seat
shaft
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
EP99120668A
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German (de)
French (fr)
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EP0995371B1 (en
Inventor
Dirk Hüsemann
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Drabert GmbH
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Drabert GmbH
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Publication of EP0995371A1 publication Critical patent/EP0995371A1/en
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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/022Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/024Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/022Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/024Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
    • A47C1/026Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism

Definitions

  • the invention relates to an office chair a seat support that is one horizontal and transverse axis in a support frame with adjustable inclination is, the tilt adjustment by means of an eccentric rotating shaft, those with at least one concentric Shaft part in a pivot bearing of the support frame is stored and the at least an eccentric shaft part (eccentric) has that in an eccentric bearing Seat carrier runs such that a Angle adjustment made by the seat user the inclination of the rotary shaft Seat support relative to the support frame changed.
  • Eccentric adjustments are certain Limits self-locking, i.e. they change their angle of rotation position set by the seat user Not. However, that applies then no longer when the eccentrics that in an eccentric bearing of the seat support are positioned with a excessive body weight of the seat user or with a too strong dynamic Behavior of the seat user is burdened that are e.g. in tremors the eccentric bearing affects. Then can it leads to unwanted adjustments of the Seat inclination come.
  • the object of the invention is an office chair of the aforementioned type with a Tilt adjustment of the seat so improve that unwanted pretense not the seat inclination may occur.
  • the eccentric rotary shaft one Has handling part that is relative to Functional part of the rotary shaft is rotatable, and that between the functional part of the Rotary shaft and the support frame a disengageable There is lockout when not disengaged, the angle of rotation adjustment of the functional part of the Blocked rotary shaft, being a first Angle of rotation range of the seat user on Handling part of the rotary shaft executed Angle adjustment by means of a conversion gear in a disengagement movement of the blocking intervention is implemented and a subsequent second angle range that of the seat user on the handling part the rotary shaft adjustment via a driver stop between the handling part and the Functional part of the rotary shaft an analog Rotation angle adjustment of the functional part the rotating shaft.
  • Office chair has the first Advantage that its ease of use when adjusting the seat inclination preserved.
  • the seat user operates only one rotary shaft as before and thereby adjusts the seat inclination in the way you want.
  • defined transition between a first and second rotation angle range the rotating shaft remains in the seat user Normally undetected and unnoticed, there the successive rotation angle ranges the rotary shaft only internal Functional processes concern.
  • a particularly useful construction the locking engagement exists according to claim 2 in that this is in the form of a Functional part of the rotating shaft Helical gear teeth formed is that in the non-disengaged state with one fixed to the supporting frame Spur gear toothing is engaged, whereby on the functional part of the rotating shaft sitting spur gear teeth by a axial displacement movement on the rotary shaft can be disengaged against the pressure of a locking spring is.
  • a lockout between the functional part of the rotating shaft and the support frame is easy and inexpensive to manufacture.
  • bevels can run in both directions the rotary shaft is the same be so that the seat user the rotating shaft optionally in one or the other direction of rotation can rotate and always be desired target of an inclination adjustment reached the seat.
  • Support frame 4 of an office chair is a Die-cast molding in which the seat support 5 (consisting of the two lateral Mounting rails 6 and the crosshead 7) inclination adjustable is installed.
  • the seat support 5 Consisting of the two lateral Mounting rails 6 and the crosshead 7) inclination adjustable is installed.
  • this purpose in the middle of the seat support a transverse axis 8 is provided, the End pieces are held in the support frame and on which the seat support faces forward or tilted backwards can.
  • the desired inclination of the seat support 5 is done manually using the to be operated eccentric rotary shaft 9 set.
  • This consists in detail of the Handling part 10, in the illustration 1 approximately in the outer wall of the Support frame 4 ends. That follows then the functional part 11 of the rotary shaft on the inside of the support frame 4 located.
  • Fig. 2 shows that in Fig. 1 on the right Side existing pivot bearing and the one there existing eccentric more precisely.
  • the pivot bearing from which the top cover to Cut away for better visibility is, is due to its two outside Bearing walls 12 shown. These are stationary molded in the support frame 4.
  • this pivot bearing is concentric executed shaft part 13. This closes the eccentric shaft part 14 at the one in an eccentric bearing (not shown) that in the seat support 5 is present, running and its Eccentric stroke the inclination adjustment of the Seat support around its transverse axis (Tilt axis 8) controls.
  • a helical compression spring (Locking spring 15) arranged one axial displacement bushing 16 with the Spur gear teeth 17 permanently in In the direction of the spur gear teeth 18, which is fixed in position on the support frame 4 is. If the handling part 10 of the rotary shaft not activated, then there are Helical gear teeth 17 and 18 in mutual Engaging and blocking any unwanted Rotation angle adjustment of the functional part 11 of the rotary shaft 9.
  • the handling part 10 At the end of the first rotation angle range the handling part 10 reaches the Driver stop 21 (see Fig. 3) so that in the second range of rotation every other Rotation angle adjustment of the handling part 10 an analog rotation angle adjustment of the Functional 11 of the rotary shaft.
  • the seat user then adjusts the eccentric stroke for the tilt adjustment desired by him the seat.
  • the seat user ends the rotation angle adjustment of the handling part 10 of the Rotary shaft, then the locking spring 15 for immediate and effective blocking of the functional part of the rotary shaft against any undesired further rotation angle adjustment.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chairs Characterized By Structure (AREA)

Abstract

The incline adjustment is through an eccentric rotary shaft which has a handle part (10) rotatable relative to the function part (11) of the rotary shaft. A releasable locking engagement is set between the function part and the support frame and in the non-engaged state blocks the rotary angle adjustment of the function part. The incline adjustment is through an eccentric rotary shaft which has a handle part (10) rotatable relative to the function part (11) of the rotary shaft. A releasable locking engagement is set between the function part and the support frame and in the non-engaged state blocks the rotary angle adjustment of the function part. A first rotary angle area of adjustment executed by the user on the handle part is converted by a conversion gear into a release movement of the locking engagement. A subsequent second rotary angle area of the rotary angle adjustment causes through a follower stop between the handle and function part a similar rotary angle adjustment of the function part.

Description

Die Erfindung betrifft einen Bürostuhl mit einem Sitzflächenträger, der um eine horizontal und quer verlaufende Achse in einem Tragrahmen neigungsverstellbar gelagert ist, wobei die Neigungsverstellung mittels einer Exzenter-Drehwelle erfolgt, die mit mindestens einem konzentrischen Wellenteil in einem Drehlager des Tragrahmens gelagert ist und die mindestens einen exzentrischen Wellenteil (Exzenter) aufweist, der in einem Exzenterlager des Sitzflächenträgers läuft derart, daß eine vom Sitzbenutzer ausgeführte Drehwinkelverstellung der Drehwelle die Neigung des Sitzflächenträgers relativ zum Tragrahmen verändert.The invention relates to an office chair a seat support that is one horizontal and transverse axis in a support frame with adjustable inclination is, the tilt adjustment by means of an eccentric rotating shaft, those with at least one concentric Shaft part in a pivot bearing of the support frame is stored and the at least an eccentric shaft part (eccentric) has that in an eccentric bearing Seat carrier runs such that a Angle adjustment made by the seat user the inclination of the rotary shaft Seat support relative to the support frame changed.

Solche Exzenterverstellungen für eine Sitzneigungsverstellung von Bürostühlen sind bekannt. Sie sind im Regelfall unabhängig von anderen Einstellmöglichkeiten des Bürostuhles und auch unabhängig von einer gegebenenfalls vorhandenen Synchronmechanik des Bürostuhles zu betätigen.Such eccentric adjustments for one Seat tilt adjustment of office chairs are known. As a rule, they are independent of other setting options of the office chair and also regardless of a possibly existing synchronous mechanism of the office chair.

Exzenterverstellungen sind in bestimmten Grenzen selbsthemmend, d.h. sie verändern ihre vom Sitzbenutzer eingestellte Drehwinkelposition nicht. Das gilt jedoch dann nicht mehr, wenn die Exzenter, die in einem Exzenterlager des Sitzflächenträgers positioniert sind, mit einem zu hohen Körpergewicht des Sitzbenutzers oder mit einem zu starken dynamischen Verhalten des Sitzbenutzers belastet sind, das sich z.B. in Erschütterungen der Exzenterlagerung auswirkt. Dann kann es zu unerwünschten Verstellungen der Sitzflächenneigung kommen. Eccentric adjustments are certain Limits self-locking, i.e. they change their angle of rotation position set by the seat user Not. However, that applies then no longer when the eccentrics that in an eccentric bearing of the seat support are positioned with a excessive body weight of the seat user or with a too strong dynamic Behavior of the seat user is burdened that are e.g. in tremors the eccentric bearing affects. Then can it leads to unwanted adjustments of the Seat inclination come.

Aufgabe der Erfindung ist es, einen Bürostuhl der vorgenannten Art mit einer Neigungsverstellung der Sitzfläche so zu verbessern, daß unerwünschte Verstellungen der Sitzflächenneigung nicht auftreten können.The object of the invention is an office chair of the aforementioned type with a Tilt adjustment of the seat so improve that unwanted pretense not the seat inclination may occur.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Exzenter-Drehwelle einen Handhabungsteil aufweist, der relativ zum Funktionsteil der Drehwelle rotierbar ist, und daß zwischen dem Funktionsteil der Drehwelle und dem Tragrahmen ein ausrückbarer Sperreingriff vorhanden ist, der im nicht-ausgerückten Zustand die Drehwinkelverstellung des Funktionsteils der Drehwelle blockiert, wobei ein erster Drehwinkelbereich der vom Sitzbenutzer am Handhabungsteil der Drehwelle ausgeführten Drehwinkelverstellung mittels eines Umsetzungsgetriebes in eine Ausrückbewegung des Sperreingriffs umgesetzt wird und ein nachfolgender zweiter Drehwinkelbereich der vom Sitzbenutzer am Handhabungsteil der Drehwelle ausgeführten Drehwinkelverstellung über einen Mitnehmeranschlag zwischen dem Handhabungsteil und dem Funktionsteil der Drehwelle eine analoge Drehwinkelverstellung des Funktionsteils der Drehwelle bewirkt. This object is achieved according to the invention solved that the eccentric rotary shaft one Has handling part that is relative to Functional part of the rotary shaft is rotatable, and that between the functional part of the Rotary shaft and the support frame a disengageable There is lockout when not disengaged, the angle of rotation adjustment of the functional part of the Blocked rotary shaft, being a first Angle of rotation range of the seat user on Handling part of the rotary shaft executed Angle adjustment by means of a conversion gear in a disengagement movement of the blocking intervention is implemented and a subsequent second angle range that of the seat user on the handling part the rotary shaft adjustment via a driver stop between the handling part and the Functional part of the rotary shaft an analog Rotation angle adjustment of the functional part the rotating shaft.

Ein nach der Lehre der Erfindung gefertigter Bürostuhl hat zunächst den Vorteil, daß dessen Bedienungsfreundlichkeit beim Verstellen der Sitzflächenneigung erhalten bleibt. Der Sitzbenutzer betätigt wie bisher lediglich eine Drehwelle und verstellt dadurch die Sitzflächenneigung in der gewünschten Weise. Der nach der vorstehenden Lehre der Erfindung definierte Übergang zwischen einem ersten und zweiten Drehwinkelbereich der Drehwelle bleibt vom Sitzbenutzer im Normalfall unerkannt und unbemerkt, da die nacheinander durchlaufenen Drehwinkelbereiche der Drehwelle lediglich interne Funktionsabläufe betreffen.One made according to the teaching of the invention Office chair has the first Advantage that its ease of use when adjusting the seat inclination preserved. The seat user operates only one rotary shaft as before and thereby adjusts the seat inclination in the way you want. According to the above teaching of the invention defined transition between a first and second rotation angle range the rotating shaft remains in the seat user Normally undetected and unnoticed, there the successive rotation angle ranges the rotary shaft only internal Functional processes concern.

Im ersten Drehwinkelbereich wird ein Sperreingriff entarretiert, d.h. ausgerückt, der ohne aktuelle Betätigung der Drehwelle permanent im Eingriff ist und dadurch jede unerwünschte Verstellung des oder der Exzenter der Drehwelle, deren jeweiliger Exzenterhub die Sitzflächenneigung bestimmt, wirksam verhindert.In the first rotation angle range there is a lockout intervention unlocked, i.e. disengaged, the one without the current actuation of the rotary shaft is permanently engaged and therefore everyone unwanted adjustment of the Eccentric of the rotary shaft, its respective Eccentric stroke determines the seat inclination, effectively prevented.

Im zweiten Drehwinkelbereich ist dann der Sperreingriff ausgerückt, so daß in diesem Drehwinkelbereich über einen Mitnehmeranschlag der jeweilige Exzenterhub verstellt werden kann. In the second range of rotation angle is then Lockout disengaged so that in this Angle of rotation range via a driver stop the respective eccentric stroke is adjusted can be.

Eine besonders zweckmäßige Konstruktion des Sperreingriffs besteht nach Anspruch 2 darin, daß dieser in Form einer auf dem Funktionsteil der Drehwelle drehfest aufsitzenden Stirnradverzahnung ausgebildet ist, die im nicht-ausgerückten Zustand mit einer am Tragrahmen ortsfest befestigten Stirnradverzahnung im Eingriff ist, wobei die auf dem Funktionsteil der Drehwelle aufsitzende Stirnradverzahnung durch eine axiale Verschiebebewegung auf der Drehwelle gegen den Druck einer Zuhaltefeder ausrückbar ist. Solch ein Sperreingriff zwischen dem Funktionsteil der Drehwelle und dem Tragrahmen ist einfach und kostengünstig herzustellen.A particularly useful construction the locking engagement exists according to claim 2 in that this is in the form of a Functional part of the rotating shaft Helical gear teeth formed is that in the non-disengaged state with one fixed to the supporting frame Spur gear toothing is engaged, whereby on the functional part of the rotating shaft sitting spur gear teeth by a axial displacement movement on the rotary shaft can be disengaged against the pressure of a locking spring is. Such a lockout between the functional part of the rotating shaft and the support frame is easy and inexpensive to manufacture.

Das gilt auch für das Umsetzungsgetriebe, das im ersten Drehwinkelbereich die Drehbewegung des Handhabungsteils der Drehwelle in eine axiale Ausrückbewegung des Sperreingriffs umsetzt. Nach Anspruch 3 besteht eine einfache Ausführungsform eines solchen Umsetzungsgetriebes aus einer oder mehreren Anlaufschrägen, die an den aneinanderliegenden stirnseitigen Anlageflächen des Handhabungsteils und des Funktionsteils der Drehwelle angeordnet sind.This also applies to the conversion gear, that in the first range of the rotation angle the handling part of the rotating shaft in an axial disengagement movement of the locking engagement implements. According to claim 3 a simple embodiment of such Implementation gear from one or more Sloping ceilings on the adjacent front contact surfaces of the handling part and the functional part of the rotary shaft are arranged.

Diese Anlaufschrägen können in beide Drehrichtungen der Drehwelle gleich ausgebildet sein, so daß der Sitzbenutzer die Drehwelle wahlweise in die eine oder andere Drehrichtung rotieren kann und immer sein gewünschtes Ziel einer Neigungsverstellung der Sitzfläche erreicht.These bevels can run in both directions the rotary shaft is the same be so that the seat user the rotating shaft optionally in one or the other direction of rotation can rotate and always be desired target of an inclination adjustment reached the seat.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnungen näher beschrieben. Es zeigen:

Fig. 1
in perspektivischer Darstellung den Tragrahmen eines Bürostuhls mit eingebauter Sitzflächenneigungsverstellung,
Fig. 2
die Drehwelle der Sitzflächenneigungsverstellung im nichtbetätigten Zustand,
Fig. 3
die Drehwelle der Sitzflächenneigungsverstellung im betätigten Zustand.
An exemplary embodiment of the invention is described in more detail below with reference to the drawings. Show it:
Fig. 1
in perspective the support frame of an office chair with built-in seat inclination adjustment,
Fig. 2
the rotating shaft of the seat inclination adjustment when not in use,
Fig. 3
the rotating shaft of the seat inclination adjustment when actuated.

Der in Fig. 1 perspektivisch dargestellte Tragrahmen 4 eines Bürostuhls ist ein Druckguß-Formteil, in das der Sitzflächenträger 5 (bestehend aus den beiden seitlichen Montageschienen 6 und dem Querhaupft 7) neigungsverstellbar eingebaut ist. Bei dem dargestellten Ausführungsbeispiel ist zu diesem Zweck etwa mittig im Sitzflächenträger eine Querachse 8 vorgesehen, deren Endstücke im Tragrahmen gehalten sind und auf der der Sitzflächenträger nach vorne oder nach hinten geneigt (gekippt) werden kann.The one shown in perspective in FIG. 1 Support frame 4 of an office chair is a Die-cast molding in which the seat support 5 (consisting of the two lateral Mounting rails 6 and the crosshead 7) inclination adjustable is installed. In which illustrated embodiment is too this purpose in the middle of the seat support a transverse axis 8 is provided, the End pieces are held in the support frame and on which the seat support faces forward or tilted backwards can.

Die jeweils gewünschte Neigung des Sitzflächenträgers 5 wird mittels der manuell zu betätigenden Exzenter-Drehwelle 9 eingestellt. Diese besteht im einzelnen aus dem Handhabungsteil 10, der in der Darstellung gemäß Fig. 1 etwa in der Außenwandung des Tragrahmens 4 endet. Daran schließt sich dann der Funktionsteil 11 der Drehwelle an, der sich innerhalb des Tragrahmens 4 befindet. Bei dem dargestellten Ausführungsbeispiel besitzt der Funktionsteil der Drehwelle auf beiden Seiten jeweils im Bereich der Montageschienen 6 des Sitzflächenträgers je ein konzentrisches Wellenteil als Drehlager und je ein exzentrisches Wellenteil als Exzenter.The desired inclination of the seat support 5 is done manually using the to be operated eccentric rotary shaft 9 set. This consists in detail of the Handling part 10, in the illustration 1 approximately in the outer wall of the Support frame 4 ends. That follows then the functional part 11 of the rotary shaft on the inside of the support frame 4 located. In the illustrated embodiment has the functional part of Rotary shaft on both sides in Area of the mounting rails 6 of the seat support one concentric each Shaft part as a pivot bearing and one each eccentric shaft part as eccentric.

Fig. 2 zeigt das in Fig. 1 auf der rechten Seite vorhandene Drehlager und den dort vorhandenen Exzenter genauer. Das Drehlager, von dem die obere Abdeckung zur besseren Erkennbarkeit weggeschnitten ist, ist durch seine beiden außenliegenden Lagerwände 12 dargestellt. Diese sind ortsfest in dem Tragrahmen 4 ausgeformt. In diesem Drehlager liegt der konzentrisch ausgeführte Wellenteil 13. Daran schließt sich der exzentrisch ausgeführte Wellenteil 14 an, der in einem Exzenterlager (nicht dargestellt), das im Sitzflächenträger 5 vorhanden ist, läuft und dessen Exzenterhub die Neigungsverstellung des Sitzflächenträgers um seine Querachse (Kippachse 8) steuert.Fig. 2 shows that in Fig. 1 on the right Side existing pivot bearing and the one there existing eccentric more precisely. The pivot bearing from which the top cover to Cut away for better visibility is, is due to its two outside Bearing walls 12 shown. These are stationary molded in the support frame 4. In this pivot bearing is concentric executed shaft part 13. This closes the eccentric shaft part 14 at the one in an eccentric bearing (not shown) that in the seat support 5 is present, running and its Eccentric stroke the inclination adjustment of the Seat support around its transverse axis (Tilt axis 8) controls.

In dem konzentrisch ausgeführten Wellenteil 13 ist eine Schraubendruckfeder (Zuhaltefeder 15) angeordnet, die eine axiale Verschiebebuchse 16 mit der Stirnradverzahnung 17 permanent in Richtung der Stirnradverzahnung 18 drückt, die ortsfest an dem Tragrahmen 4 positioniert ist. Wird der Handhabungsteil 10 der Drehwelle nicht betätigt, dann befinden sich die Stirnradverzahnungen 17 und 18 im gegenseitigen Eingriff und sperren jede unerwünschte Drehwinkelverstellung des Funktionsteils 11 der Drehwelle 9.In the concentric shaft section 13 is a helical compression spring (Locking spring 15) arranged one axial displacement bushing 16 with the Spur gear teeth 17 permanently in In the direction of the spur gear teeth 18, which is fixed in position on the support frame 4 is. If the handling part 10 of the rotary shaft not activated, then there are Helical gear teeth 17 and 18 in mutual Engaging and blocking any unwanted Rotation angle adjustment of the functional part 11 of the rotary shaft 9.

Wird der Handhabungsteil 10 der Drehwelle darstellungsgemäß rechts-herum betätigt, dann wird zunächst in einem ersten Drehwinkelbereich über die Anlaufschrägen 19 und 20, die an den stirnseitigen Anlageflächen des Handhabungsteils 10 und des Funktionsteils 11 der Drehwelle vorhanden sind, die axiale Verschiebebuchse 16 mit der Stirnradverzahnung 17 axial auf der Drehwelle gegen den Druck der Zuhaltefeder 15 zurückgedrückt derart, daß die Stirnradverzahnungen 17 und 18 außer Eingriff kommen. Fig. 3 zeigt dies genauer.If the handling part 10 of the rotary shaft actuated clockwise as shown, then first in a first rotation angle range on the bevels 19 and 20, which are on the end faces the handling part 10 and the Functional part 11 of the rotary shaft available are, the axial sliding bush 16 with the spur gear 17 axially on the Rotary shaft against the pressure of the locking spring 15 pushed back in such a way that the spur gear teeth 17 and 18 disengaged come. 3 shows this in more detail.

Am Ende des ersten Drehwinkelbereiches erreicht der Handhabungsteil 10 den Mitnehmeranschlag 21 (siehe Fig. 3), so daß im zweiten Drehwinkelbereich jede weitere Drehwinkelverstellung des Handhabungsteils 10 eine analoge Drehwinkelverstellung des Funktionstetis 11 der Drehwelle bewirkt. Der Sitzbenutzer verstellt dann den Exzenterhub für die von ihm gewünschte Neigungsverstellung der Sitzfläche.At the end of the first rotation angle range the handling part 10 reaches the Driver stop 21 (see Fig. 3) so that in the second range of rotation every other Rotation angle adjustment of the handling part 10 an analog rotation angle adjustment of the Functional 11 of the rotary shaft. The seat user then adjusts the eccentric stroke for the tilt adjustment desired by him the seat.

Beendet der Sitzbenutzer die Drehwinkelverstellung des Handhabungsteils 10 der Drehwelle, dann sorgt die Zuhaltefeder 15 für eine sofortige und wirksame Sperrung des Funktionsteils der Drehwelle gegen jede unerwünschte weitere Drehwinkelverstellung.The seat user ends the rotation angle adjustment of the handling part 10 of the Rotary shaft, then the locking spring 15 for immediate and effective blocking of the functional part of the rotary shaft against any undesired further rotation angle adjustment.

Claims (4)

Bürostuhl mit einem Sitzflächenträger, der um eine horizontal und quer verlaufende Achse in einem Tragrahmen neigungsverstellbar gelagert ist, wobei die Neigungsverstellung mittels einer Exzenter-Drehwelle erfolgt, die mit mindestens einem konzentrischen Wellenteil in einem Drehlager des Tragrahmens gelagert ist und die mindestens einen exzentrischen Wellenteil (= Exzenter) aufweist, der in einem Exzenterlager des Sitzflächenträgers läuft derart, daß eine vom Sitzbenutzer ausgeführte Drehwinkelverstellung der Drehwelle die Neigung des Sitzflächenträgers relativ zum Tragrahmen verändert,
dadurch gekennzeichnet,
daß die Drehwelle einen Handhabungsteil (10) aufweist, der relativ zum Funktionsteil (11) der Drehwelle rotierbar ist, daß zwischen dem Funktionsteil der Drehwelle und dem Tragrahmen (4) ein ausrückbarer Sperreingriff (17, 18) vorhanden ist, der im nicht-ausgerückten Zustand die Drehwinkelverstellung des Funktionsteils der Drehwelle blockiert, und daß ein erster Drehwinkelbereich der vom Sitzbenutzer am Handhabungsteil der Drehwelle ausgeführten Drehwinkelverstellung mittels eines Umsetzungsgetriebes (19, 20) in eine Ausrückbewegung des Sperreingriffs umgesetzt wird und daß ein nachfolgender zweiter Drehwinkelbereich der vom Sitzbenutzer am Handhabungsteil der Drehwelle ausgeführten Drehwinkelverstellung über einen Mitnehmeranschlag (21) zwischen dem Handhabungsteil und dem Funktionsteil der Drehwelle eine analoge Drehwinkelverstellung des Funktionstelis der Drehwelle bewirkt.
Office chair with a seat support that is tilt-adjustable in a support frame around a horizontal and transverse axis, the inclination is adjusted by means of an eccentric rotary shaft which is mounted with at least one concentric shaft part in a rotary bearing of the support frame and which has at least one eccentric shaft part (= eccentric) which runs in an eccentric bearing of the seat support in such a way that a rotation angle adjustment carried out by the seat user the rotating shaft changes the inclination of the seat support relative to the supporting frame,
characterized,
that the rotary shaft has a handling part (10) which is rotatable relative to the functional part (11) of the rotary shaft, that a disengageable locking engagement (17, 18) is present between the functional part of the rotary shaft and the support frame (4), which blocks the rotation angle adjustment of the functional part of the rotary shaft in the non-disengaged state, and that a first rotation angle range of the rotation angle adjustment carried out by the seat user on the handling part of the rotating shaft is converted into a disengagement movement of the locking engagement by means of a conversion gear (19, 20) and that a subsequent second angle of rotation range of the angle of rotation adjustment carried out by the seat user on the handling part of the rotating shaft via a driver stop (21) between the handling part and the functional part of the rotating shaft effects an analogous rotation angle adjustment of the functional part of the rotating shaft.
Bürostuhl nach Anspruch 1,
dadurch gekennzeichnet, daß der Sperreingriff in Form einer auf dem Funktionsteil (11) der Drehwelle drehfest aufsitzenden Stirnradverzahnung (17) ausgebildet ist, die im nicht-ausgerückten Zustand mit einer am Tragrahmen (4) ortsfest befestigten Stirnradverzahnung (18) im Eingriff ist und daß die auf dem Funktionsteil der Drehwelle aufsitzende Stirnradverzahnung (17) durch axiale Verschiebung auf der Drehwelle gegen den Druck einer Zuhaltefeder (15) ausrückbar ist.
Office chair according to claim 1,
characterized, that the locking engagement is in the form of a spur gear toothing (17) seated in a rotationally fixed manner on the functional part (11) of the rotary shaft, which in the non-disengaged state engages with a spur gear toothing (18) fixedly attached to the support frame (4) and that the spur gear teeth (17) seated on the functional part of the rotary shaft can be disengaged by axial displacement on the rotary shaft against the pressure of a locking spring (15).
Bürostuhl nach Anspruch 1,
dadurch gekennzeichnet, daß das Umsetzungsgetriebe in Form einer oder mehrerer Anlaufschrägen (19, 20) ausgebildet ist, die an den aneinanderliegenden stirnseitigen Anlageflächen des Handhabungsteils (10) und des Funktionsteils (11) der Drehwelle angeordnet sind.
Office chair according to claim 1,
characterized, that the conversion gear is designed in the form of one or more bevels (19, 20) which are arranged on the abutting end contact surfaces of the handling part (10) and the functional part (11) of the rotary shaft.
Bürostuhl nach Anspruch 3,
dadurch gekennzeichnet, daß die Anlaufschrägen (19, 20) in beide Drehrichtungen der Drehwelle ausgebildet sind.
Office chair according to claim 3,
characterized, that the chamfers (19, 20) are formed in both directions of rotation of the rotary shaft.
EP99120668A 1998-10-21 1999-10-19 Office-chair with a seat adjustable in inclination Expired - Lifetime EP0995371B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19849522 1998-10-21
DE19849522A DE19849522A1 (en) 1998-10-21 1998-10-21 Office chair with a seat tilt adjustment

Publications (2)

Publication Number Publication Date
EP0995371A1 true EP0995371A1 (en) 2000-04-26
EP0995371B1 EP0995371B1 (en) 2003-04-02

Family

ID=7885813

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99120668A Expired - Lifetime EP0995371B1 (en) 1998-10-21 1999-10-19 Office-chair with a seat adjustable in inclination

Country Status (3)

Country Link
US (1) US6283549B1 (en)
EP (1) EP0995371B1 (en)
DE (2) DE19849522A1 (en)

Cited By (4)

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EP1169947A1 (en) * 2000-07-08 2002-01-09 Dauphin Entwicklungs- u. Beteiligungs-GmbH Chair, particularly office chair
EP1192876A3 (en) * 2000-09-29 2003-09-10 Sedus Stoll AG Chair with adjustable seat
DE102006049676A1 (en) * 2006-10-18 2008-04-24 Sedus Stoll Ag Chair with tilting seat
EP2014195A1 (en) * 2007-07-10 2009-01-14 Håg Asa Tilting fitting for a chair

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DE19922446B8 (en) * 1999-05-07 2009-02-19 Bock-1 Gmbh & Co. Synchronous mechanism for a correlated seat-backrest movement of an office chair
DE20216307U1 (en) 2002-10-22 2002-12-19 BOCK 1 GmbH & Co., 92353 Postbauer-Heng Seat support device for adjusting the inclination of a chair
US6916067B2 (en) * 2003-10-09 2005-07-12 Jien-Feng Liu Angle adjusting mechanism for chair
US7445586B2 (en) * 2005-04-15 2008-11-04 John Gibson Combination chair and leg extension apparatus for obesity prophylaxis
ITMI20060022U1 (en) * 2006-01-23 2007-07-24 Donati Spa ADJUSTMENT DEVICE FOR THE INCLINE OF THE BACKREST OR THE SEAT OF A CHAIR
ITCR20070007A1 (en) * 2007-03-27 2008-09-28 L & P Property Management Company SEAT MECHANISM WITH REGULATION OF TWO POSITIONS OF REST
US9988094B1 (en) 2015-12-07 2018-06-05 Apple Inc. Internally stiffened body structure
US10383448B1 (en) * 2018-03-28 2019-08-20 Haworth, Inc. Forward tilt assembly for chair seat

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Cited By (8)

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Publication number Priority date Publication date Assignee Title
EP1169947A1 (en) * 2000-07-08 2002-01-09 Dauphin Entwicklungs- u. Beteiligungs-GmbH Chair, particularly office chair
US6572191B2 (en) 2000-07-08 2003-06-03 Dauphin Entwicklungs- U. Beteiligungs-Gmbh Chair, in particular office chair, having a synchronous mechanism
EP1192876A3 (en) * 2000-09-29 2003-09-10 Sedus Stoll AG Chair with adjustable seat
DE102006049676A1 (en) * 2006-10-18 2008-04-24 Sedus Stoll Ag Chair with tilting seat
EP1967095A3 (en) * 2006-10-18 2008-10-08 Sedus Stoll AG Chair with inclinable seat
DE102006049676B4 (en) * 2006-10-18 2008-12-11 Sedus Stoll Ag Chair with tilting seat
US7614698B2 (en) 2006-10-18 2009-11-10 Sedus Stoll Aktiengesellschaft Chair with tilting seat
EP2014195A1 (en) * 2007-07-10 2009-01-14 Håg Asa Tilting fitting for a chair

Also Published As

Publication number Publication date
EP0995371B1 (en) 2003-04-02
DE19849522A1 (en) 2000-04-27
DE59904823D1 (en) 2003-05-08
US6283549B1 (en) 2001-09-04

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