EP0264555B1 - Chair, particularly an office chair, having a backrest adjustable in height - Google Patents

Chair, particularly an office chair, having a backrest adjustable in height Download PDF

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Publication number
EP0264555B1
EP0264555B1 EP87111376A EP87111376A EP0264555B1 EP 0264555 B1 EP0264555 B1 EP 0264555B1 EP 87111376 A EP87111376 A EP 87111376A EP 87111376 A EP87111376 A EP 87111376A EP 0264555 B1 EP0264555 B1 EP 0264555B1
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EP
European Patent Office
Prior art keywords
support
chair
backrest
seat
back rest
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
EP87111376A
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German (de)
French (fr)
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EP0264555A3 (en
EP0264555A2 (en
Inventor
Elke Dauphin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Buerositzmobelfabrik Friedrich-W Dauphin & Co GmbH
Original Assignee
Buerositzmobelfabrik Friedrich-W Dauphin & Co GmbH
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Application filed by Buerositzmobelfabrik Friedrich-W Dauphin & Co GmbH filed Critical Buerositzmobelfabrik Friedrich-W Dauphin & Co GmbH
Priority to AT87111376T priority Critical patent/ATE60497T1/en
Publication of EP0264555A2 publication Critical patent/EP0264555A2/en
Publication of EP0264555A3 publication Critical patent/EP0264555A3/en
Application granted granted Critical
Publication of EP0264555B1 publication Critical patent/EP0264555B1/en
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Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/402—Support for the head or the back for the back adjustable in height

Definitions

  • the invention relates to a chair according to the preamble of claim 1.
  • a telescopic backrest support is provided which is provided with a multi-purpose backrest at its upper end.
  • This chair is primarily used for physiotherapy purposes.
  • the height of the backrest support with backrest is adjusted using a screw or a pin-hole lock.
  • the division of the backrest support creates two relatively short support parts.
  • the locking device can be released relatively easily, so that a simple height adjustment of the backrest is possible.
  • This configuration also enables tool-free assembly and disassembly of the backrest by pushing or pushing the two support parts apart when the locking device is open.
  • the disadvantage is that the support parts can be pulled apart when adjusting the backrest, which in turn makes handling more difficult.
  • a backrest height adjustment for office chairs in which a backrest is guided to be adjustable in height on a fixed backrest support.
  • a backrest support In the backrest support Recesses attached, into which a locking ball can be pressed by means of an inclined surface.
  • This inclined surface is connected to an actuating pin which is guided in the backrest next to and parallel to the backrest support. If the inclined surface is pushed up against a return spring by appropriate actuation of the pin, the locking ball can fall out. The backrest can then be moved.
  • the invention has for its object to design a chair of the generic type so that it can be used as an office chair with a height-adjustable backrest and that inadvertent loosening of the two telescopic support parts is prevented with height adjustments of the backrest.
  • Fig. 3 is a view of the backrest support according to the arrow III in Fig. 2, and
  • FIG. 4 shows a section through the backrest support in the area of the locking device according to section line IV-IV in FIG. 3.
  • An office chair shown in Fig. 1 has a base 1, which is supported by rollers 2 against the floor.
  • a height-adjustable chair column 3 is attached, at the upper end of which a seat support 4 is attached, on which in turn a padded seat 5 is attached.
  • On the seat support 4 is a essentially upward extending backrest support 6 is attached, at the upper end of a backrest 7 is attached.
  • the height adjustment of the chair column 3 is carried out by means of an operating lever 8 mounted in the seat support 4.
  • a further actuating lever 9 is mounted on the seat support 4.
  • the basic structure of the office chair described is generally known.
  • the height-adjustable chair column 3 is known for example from DE-PS 19 31 012 (corresponding to US Pat. No. 3,711,054) or DE-PS 18 12 282 (corresponding to US Pat. No. 3,656,593).
  • the structure of the seat support including the described pivoting possibilities of the backrest 7 and seat 5 is known for example from EP-OS 0 179 185 (corresponding to ZA-PS 85/6126).
  • the seat support 4 can be partially or largely covered by a panel 10 attached to the underside of the seat 5.
  • the backrest support 6 is designed telescopically, ie it consists of two parts guided into one another.
  • the upper end 12 of the outer support part 11 is fastened to the backrest 7.
  • the lower end of the inner support part 13, which is guided in the outer support part, is attached to the seat support 4.
  • the cross section of the two support parts 11, 13 is approximately rectangular and adapted to one another, so that the two parts can be displaced in their longitudinal direction with respect to one another but not rotated with respect to one another.
  • a locking device 14 is provided in order to be able to lock the two support parts 11, 13, which are displaceable in their longitudinal direction with respect to one another, in a predetermined position, in order to be able to fix a height adjustment of the backrest 7.
  • recesses 16 in the form of spherical spheres are formed on a longitudinal side 15 of the inner support part 13 and run parallel to the common central longitudinal axis 17 of the two support parts 11, 13 in the region in which the two support parts 11, 13 can be moved into one another.
  • the central longitudinal axis 17 is a straight line.
  • an opening 18 is formed in the outer carrier part 11, in which a ball 19 is arranged, which can be placed in a respective recess 16.
  • the spherical cap-shaped depressions 16 and the ball 19 are therefore matched to one another.
  • a slide 20 is provided above the ball 19 and is guided in guide rails 21.
  • These guide rails 21 are on the larger outside Wall 22 of the outer support member 11 is attached, which is assigned to the longitudinal side 15 of the inner support 13.
  • the direction of displacement 23 is perpendicular to the axis 17, that is to say horizontally, based on a flat floor as a seat for the chair, and parallel to the outer wall 22, that is also perpendicular to the vertical main plane of symmetry of the chair.
  • a cavity 24 partially accommodating the ball 19 is formed, which is closed off by an inclined surface 25 which is inclined in the direction of displacement 23.
  • the pen 20 is loaded by means of a prestressed spring 26 in such a way that it is pressed into a position shown in FIGS. 3 and 4, in which the inclined surface 25 presses against the ball 19 in such a way that it moves into a recess 16 is pressed in the inner support member 13. In this position, the inner support member 13 is locked to the outer support member 11. If the slide 20 is moved against the force of this spring 26 _ in Figures 3 and 4 to the right _ to the support parts 11, 13, then the cavity 24 under the inclined surface 25 can accommodate the ball 19 so far that it from the corresponding recess 16 is lifted out or pushed. In this case, the locking between the carrier parts 11, 13 is released; the latter can be shifted against each other in the direction of the axis 17. To actuate the slide 20, an actuation button 27 is attached to it.
  • the spring 26 rests with a leg 28 against an angled section 29 of the slide 2o, to which the actuating button 27 is attached.
  • the other leg 30 is supported with an end 31 extending transversely to the outer wall 22 in a slot 32 in the outer carrier part 11.
  • a latching recess 34 is worked out, into which the end 31 of the leg 30 lies when the end 31 and the latching recess 34 come to coincide.
  • This latching recess 34 is formed in the region of the inner support part 13 up to which the maximum height adjustment of the backrest support 6 is to take place. This prevents that when the slide 20 is pressed in, that is to say when the locking device 14 is open, the backrest 7 with the outer carrier part 11 is accidentally pulled off the inner carrier part 13, that is to say that it is detached from the chair.
  • a corresponding inclined surface configuration of the latching recess 34 ensures that the outer carrier part 11 can be pushed onto the inner carrier part 13 without the end 31 of the spring 26 being fixed in this latching recess 34.
  • the carrier parts 11, 13 are surrounded by a bellows 35 which is fixed on the one hand on the backrest 7 and on the other hand on the seat carrier 4.
  • the actuation button 27 of the slide 20 is guided to the outside through a corresponding opening 36 in the bellows, so that actuation of the locking device 14 by the bellows 35 is possible.
  • a filler 37 adapted to the course of the bellows is arranged on the side opposite the operating button 27 between the outer carrier part 11 and the bellows 35.

Landscapes

  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Special Chairs (AREA)

Abstract

A chair has a seat and a back rest supported by a back rest support to be vertically adjustable, the back rest support being connected, on the one hand, to the back rest and, on the other hand, to the seat. In order, firstly, to enable a simple and elegant vertical adjustment and, secondly, to design the back rest and the seat to be suitable for packaging and, therefore, for dispatch, the back rest support is telescopically composed of an inner and an outer support member, and an interlocking device for the detachable interlocking of the two support members in varying positions, relative to one another, is provided on the back rest support.

Description

Die Erfindung betrifft einen Stuhl nach dem Oberbe­griff des Anspruches 1.The invention relates to a chair according to the preamble of claim 1.

Bei einem derartigen aus der GB-A-1 214 390 bekannten Stuhl ist ein teleskopartig aufgebauter Lehnenträger vorgesehen, der an seinem oberen Ende mit einer Mehr­zweck-Lehne versehen ist. Dieser Stuhl dient primär für physiotherapeutische Zwecke. Eine Höheneinstellung des Lehnenträgers mit Lehne erfolgt mittels einer Schraube oder einer Stift-Loch-Verriegelung. Durch die Teilung des Lehnenträgers entstehen zwei relativ kurze Trägerteile. Die Verriegelungseinrichtung läßt sich relativ leicht lösen, so daß eine einfache Höhenver­stellung der Lehne möglich ist. Diese Ausgestaltung ermöglicht auch eine werkzeuglose Montage und Demonta­ge der Lehne durch Zusammenschieben bzw. Auseinander­schieben der beiden Trägerteile bei geöffneter Verrie­gelungseinrichtung. Nachteilig ist, daß beim Verstel­len der Lehne die Trägerteile auseinandergezogen wer­den können, was wiederum die Handhabung erschwert.In such a chair known from GB-A-1 214 390, a telescopic backrest support is provided which is provided with a multi-purpose backrest at its upper end. This chair is primarily used for physiotherapy purposes. The height of the backrest support with backrest is adjusted using a screw or a pin-hole lock. The division of the backrest support creates two relatively short support parts. The locking device can be released relatively easily, so that a simple height adjustment of the backrest is possible. This configuration also enables tool-free assembly and disassembly of the backrest by pushing or pushing the two support parts apart when the locking device is open. The disadvantage is that the support parts can be pulled apart when adjusting the backrest, which in turn makes handling more difficult.

Aus der GB-A-1 149 178 ist eine Rückenlehnen-Höhenver­stellung für Bürostühle bekannt, bei der auf einem fe­sten Rückenlehnenträger eine Rückenlehne in der Höhe verstellbar geführt ist. Im Rückenlehnenträger sind Ausnehmungen angebracht, in die eine Verriegelungsku­gel mittels einer Schrägfläche drückbar ist. Diese Schrägfläche ist mit einem Betätigungsstift verbunden, der in der Rückenlehne neben und parallel zum Rücken­lehnenträger geführt ist. Wenn die Schrägfläche durch entsprechende Betätigung des Stiftes gegen eine Rück­stellfeder hochgeschoben wird, kann die Verriegelungs­kugel herausfallen. Anschließend kann die Lehne ver­schoben werden.From GB-A-1 149 178 a backrest height adjustment for office chairs is known, in which a backrest is guided to be adjustable in height on a fixed backrest support. Are in the backrest support Recesses attached, into which a locking ball can be pressed by means of an inclined surface. This inclined surface is connected to an actuating pin which is guided in the backrest next to and parallel to the backrest support. If the inclined surface is pushed up against a return spring by appropriate actuation of the pin, the locking ball can fall out. The backrest can then be moved.

Der Erfindung liegt die Aufgabe zugrunde, einen Stuhl der gattungsgemäßen Art so auszugestalten, daß er als Bürostuhl mit einer höhenverstellbaren Rückenlehne verwendbar ist und daß bei Höhenverstellungen der Rük­kenlehne ein unbeabsichtigtes Lösen der beiden tele­skopartigen Trägerteile verhindert wird.The invention has for its object to design a chair of the generic type so that it can be used as an office chair with a height-adjustable backrest and that inadvertent loosening of the two telescopic support parts is prevented with height adjustments of the backrest.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale im Kennzeichnungsteil des Anspruches 1 gelöst. Da­durch, daß die Feder als Auseinanderziehsicherung für die Trägerteile dient, wird vermieden, daß bei einem Lösen der Verriegelungseinrichtung die Trägerteile auseinandergezogen werden können.This object is achieved by the features in the characterizing part of claim 1. Characterized in that the spring serves as a pull-apart protection for the carrier parts, it is avoided that the carrier parts can be pulled apart when the locking device is released.

Insbesondere durch die vorteilhafte Weiterbildung nach Anspruch 2 ist auch bei der erfindungsgemäßen Ausge­staltung eine werkzeuglose Montage und Demontage der Rückenlehne möglich, da der zugeordnete Schenkel der Feder zur Demontage der beiden Trägerteile lediglich in der Stellung festgehalten werden muß, in der das entsprechende Ende der Feder nicht in die Rastausneh­ mung am inneren Trägerteil einrastet.In particular, through the advantageous development according to claim 2, tool-free assembly and disassembly of the backrest is also possible in the embodiment according to the invention, since the associated leg of the spring for dismantling the two support parts only has to be held in the position in which the corresponding end of the spring does not to the rest area on the inner support part.

Weitere Vorteile und Merkmale der Erfindung erge­ben sich aus den übrigen Unteransprüchen und aus der nachfolgenden Beschreibung eines Ausfüh­rungsbeispiels anhand der Zeichnung. Es zeigtFurther advantages and features of the invention result from the remaining subclaims and from the following description of an embodiment with reference to the drawing. It shows

Fig. 1 einen Stuhl in perspektivischer Ansicht,1 a chair in perspective view,

Fig. 2 einen Rückenlehnenträger des Stuhls in Seitenansicht,2 shows a backrest support of the chair in side view,

Fig. 3 eine Ansicht des Rückenlehnenträgers ge­mäß dem Sichtpfeil III in Fig. 2, undFig. 3 is a view of the backrest support according to the arrow III in Fig. 2, and

Fig. 4 einen Schnitt durch den Rückenlehnenträger im Bereich der Verriegelungseinrichtung gemäß der Schnittlinie IV-IV in Fig. 3.4 shows a section through the backrest support in the area of the locking device according to section line IV-IV in FIG. 3.

Ein in Fig. 1 dargestellter Bürostuhl weist ein Fußgestell 1 auf, das über Rollen 2 gegenüber dem Boden abgestützt ist. An dem Fußgestell 1 ist eine höhenverstellbare Stuhlsäule 3 angebracht, an deren oberem Ende ein Sitzträger 4 angebracht ist, auf dem wiederum ein gepolsterter Sitz 5 befestigt ist. Am Sitzträger 4 ist ein sich im wesentlichen nach oben erstreckender Rückenlehnen­träger 6 angebracht, an dessen oberem Ende eine Rückenlehne 7 angebracht ist. Die Höhenverstellung der Stuhlsäule 3 erfolgt mittels eines im Sitzträ­ger 4 gelagerten Bedienungshebels 8. Zur Veränderung der Neigung der Rückenlehne 7 mit Rückenlehnenträ­ger 6, gegebenenfalls unter gleichzeitigem Verän­dern der Neigung des Sitzes 5 ist ein weiterer Betätigungshebel 9 am Sitzträger 4 gelagert.An office chair shown in Fig. 1 has a base 1, which is supported by rollers 2 against the floor. On the foot frame 1, a height-adjustable chair column 3 is attached, at the upper end of which a seat support 4 is attached, on which in turn a padded seat 5 is attached. On the seat support 4 is a essentially upward extending backrest support 6 is attached, at the upper end of a backrest 7 is attached. The height adjustment of the chair column 3 is carried out by means of an operating lever 8 mounted in the seat support 4. To change the inclination of the backrest 7 with the backrest support 6, optionally while simultaneously changing the inclination of the seat 5, a further actuating lever 9 is mounted on the seat support 4.

Der geschilderte Grundaufbau des Bürostuhls ist allgemein bekannt. Die höhenverstellbare Stuhlsäu­le 3 ist beispielsweise aus der DE-PS 19 31 012 (entsprechend US-PS 3 711 054) bzw. der DE-PS 18 12 282 (entsprechend US-PS 3 656 593) bekannt. Der Aufbau des Sitzträgers einschließlich der geschilderten Verschwenkmöglichkeiten von Rückenlehne 7 und Sitz 5 ist beispielsweise aus der EP-OS 0 179 185 (entsprechend ZA-PS 85/6126) bekannt. Der Sitzträger 4 kann teilweise oder weitgehend durch eine an der Unterseite des Sitzes 5 angebrachte Verkleidung 10 optisch abgedeckt sein.The basic structure of the office chair described is generally known. The height-adjustable chair column 3 is known for example from DE-PS 19 31 012 (corresponding to US Pat. No. 3,711,054) or DE-PS 18 12 282 (corresponding to US Pat. No. 3,656,593). The structure of the seat support including the described pivoting possibilities of the backrest 7 and seat 5 is known for example from EP-OS 0 179 185 (corresponding to ZA-PS 85/6126). The seat support 4 can be partially or largely covered by a panel 10 attached to the underside of the seat 5.

Der Rücklehnenträger 6 ist teleskopartig ausgebil­det, d.h. er besteht aus zwei ineinandergeführten Teilen. Das äußere Trägerteil 11 ist mit seinem oberen Ende 12 an der Rückenlehne 7 befestigt. Das innere, im äußeren Trägerteil längsverschieb­lich geführte Trägerteil 13 ist mit seinem unteren Ende am Sitzträger 4 angebracht.The backrest support 6 is designed telescopically, ie it consists of two parts guided into one another. The upper end 12 of the outer support part 11 is fastened to the backrest 7. The lower end of the inner support part 13, which is guided in the outer support part, is attached to the seat support 4.

Wie aus den Figuren 2 bis 4, insbesondere Fig. 4, hervorgeht, ist der Querschnitt der beiden Träger­teile 11, 13 etwa rechteckig und einander angepaßt, so daß die beiden Teile in ihrer Längsrichtung gegeneinander verschiebbar, gegeneinander aber nicht verdrehbar sind.As can be seen from FIGS. 2 to 4, in particular FIG. 4, the cross section of the two support parts 11, 13 is approximately rectangular and adapted to one another, so that the two parts can be displaced in their longitudinal direction with respect to one another but not rotated with respect to one another.

Um die beiden in ihrer Längsrichtung gegeneinander verschiebbaren Trägerteile 11, 13 in einer vorge­gebenen Stellung miteinander verriegeln zu können, um also eine Höheneinstellung der Rückenlehne 7 fixieren zu können, ist eine Verriegelungsein­richtung 14 vorgesehen.A locking device 14 is provided in order to be able to lock the two support parts 11, 13, which are displaceable in their longitudinal direction with respect to one another, in a predetermined position, in order to be able to fix a height adjustment of the backrest 7.

Hierzu sind auf einer Längs-Seite 15 des inneren Trägerteils 13 kugelkalottenförmige Vertiefungen 16 ausgebildet, die parallel zur gemeinsamen Mit­tel-Längsachse 17 der beiden Trägerteile 11, 13 in dem Bereich verlaufen, in dem die beiden Träger­teile 11, 13 ineinander verschiebbar sind. In diesem Bereich ist die Mittel-Längs-Achse 17 eine Gerade.For this purpose, recesses 16 in the form of spherical spheres are formed on a longitudinal side 15 of the inner support part 13 and run parallel to the common central longitudinal axis 17 of the two support parts 11, 13 in the region in which the two support parts 11, 13 can be moved into one another. In this area, the central longitudinal axis 17 is a straight line.

In Deckung mit der Reihe von Vertiefungen 16 ist im äußeren Trägerteil 11 eine Öffnung 18 ausgebildet, in der eine Kugel 19 angeordnet ist, die sich in jeweils eine Vertiefung 16 legen kann. Die kugelkalottenförmigen Vertiefungen 16 und die Kugel 19 sind also einander angepaßt.In alignment with the row of recesses 16, an opening 18 is formed in the outer carrier part 11, in which a ball 19 is arranged, which can be placed in a respective recess 16. The spherical cap-shaped depressions 16 and the ball 19 are therefore matched to one another.

Über der Kugel 19 ist ein Schieber 20 vorgesehen, der in Führungsschienen 21 geführt ist. Diese Führungsschienen 21 sind auf der größeren Außen­ wand 22 des äußeren Trägerteils 11 angebracht, die der Längs-Seite 15 des inneren Trägers 13 zugeordnet ist. Die Verschieberichtung 23 ist senkrecht zur Achse 17, also horizontal, bezogen auf einen ebenen Boden als Aufnahme für den Stuhl, und parallel zur Außenwand 22, also auch senkrecht zur vertikalen Haupt-Symmetrieebene des Stuhles. Am Schieber 20 ist ein die Kugel 19 teilweise aufnehmender Hohlraum 24 ausgebildet, der durch eine Schrägfläche 25 abgeschlossen ist, die in Verschieberichtung 23 geneigt ist.A slide 20 is provided above the ball 19 and is guided in guide rails 21. These guide rails 21 are on the larger outside Wall 22 of the outer support member 11 is attached, which is assigned to the longitudinal side 15 of the inner support 13. The direction of displacement 23 is perpendicular to the axis 17, that is to say horizontally, based on a flat floor as a seat for the chair, and parallel to the outer wall 22, that is also perpendicular to the vertical main plane of symmetry of the chair. On the slide 20, a cavity 24 partially accommodating the ball 19 is formed, which is closed off by an inclined surface 25 which is inclined in the direction of displacement 23.

Der Schreiber 20 ist mittels einer vorgespannten Feder 26 in der Weise belastet, daß er in eine in den Fig. 3 und 4 dargestellte Stellung gedrückt wird, in der die Schrägfläche 25 gegen die Kugel 19 in der Weise drückt, daß diese in eine Vertiefung 16 im inneren Trägerteil 13 gedrückt wird. In dieser Stellung ist also das innere Trägerteil 13 mit dem äußeren Trägerteil 11 verriegelt. Wenn der Schieber 20 gegen die Kraft dieser Feder 26 _ in den Figuren 3 und 4 nach rechts _ zu den Trägerteilen 11, 13 hin verschoben wird, dann kann der Hohlraum 24 unter der Schrägfläche 25 die Kugel 19 so weit aufnehmen, daß sie aus der entsprechenden Vertiefung 16 herausgehoben bzw. _geschoben wird. In diesem Fall ist also die Verriegelung zwischen den Trägerteilen 11, 13 gelöst; letztere können in Richtung der Achse 17 gegeneinander verschoben werden. Zur Betätigung des Schiebers 20 ist an diesem ein Betätigungs­knopf 27 angebracht.The pen 20 is loaded by means of a prestressed spring 26 in such a way that it is pressed into a position shown in FIGS. 3 and 4, in which the inclined surface 25 presses against the ball 19 in such a way that it moves into a recess 16 is pressed in the inner support member 13. In this position, the inner support member 13 is locked to the outer support member 11. If the slide 20 is moved against the force of this spring 26 _ in Figures 3 and 4 to the right _ to the support parts 11, 13, then the cavity 24 under the inclined surface 25 can accommodate the ball 19 so far that it from the corresponding recess 16 is lifted out or pushed. In this case, the locking between the carrier parts 11, 13 is released; the latter can be shifted against each other in the direction of the axis 17. To actuate the slide 20, an actuation button 27 is attached to it.

Die Feder 26 liegt mit einem Schenkel 28 gegen einen abgewinkelten Abschnitt 29 des Schiebers 2o an, an dem der Betätigungsknopf 27 befestigt ist. Der andere Schenkel 30 ist mit einem quer zur Außenwand 22 verlaufenden Ende 31 in einem Schlitz 32 im äußeren Trägerteil 11 abgestützt.The spring 26 rests with a leg 28 against an angled section 29 of the slide 2o, to which the actuating button 27 is attached. The other leg 30 is supported with an end 31 extending transversely to the outer wall 22 in a slot 32 in the outer carrier part 11.

In der diesem Schlitz 32 zugewandten Schmalseite 33 des inneren Trägerteils 13 ist eine Rastausneh­mung 34 ausgearbeitet, in die sich das Ende 31 des Schenkels 30 legt, wenn das Ende 31 und die Rastausnehmung 34 zur Deckung kommen. Diese Rast­ausnehmung 34 ist in dem Bereich des inneren Trägerteils 13 ausgebildet, bis zu dem die maximale Höhenverstellung des Rückenlehnenträgers 6 erfol­gen soll. Damit wird verhindert, daß bei einge­drücktem Schieber 20, also bei geöffneter Verriege­lungseinrichtung 14, versehentlich die Rücken­lehne 7 mit dem äußeren Trägerteil 11 vom inneren Trägerteil 13 abgezogen, also vom Stuhl gelöst wird. Durch eine entsprechende Schrägflächen-Aus­gestaltung der Rastausnehmung 34 ist sichergestellt, daß das Aufschieben des äußeren Trägerteils 11 auf das innere Trägerteil 13 durchgeführt werden kann, ohne daß sich das Ende 31 der Feder 26 in dieser Rastausnehmung 34 festsetzt. Zum Montie­ren des äußeren Trägerteils 11 auf dem inneren Trägerteil 13 muß lediglich der Betätigungsknopf 27 zum Trägerteil 11 hin gedrückt werden, so daß die Kugel 19 in den Hohlraum 24 ausweichen kann. Damit sie vor der Montage der beiden Trägerteile 11, 13 nicht durch die Öffnung 18 in der Außen­ wand 22 des äußeren Trägerteils 11 herausfällt, ist der Durchmesser dieser Öffnung 18 geringfügig kleiner als der Durchmesser der Kugel 19. Aus diesem Grunde ragt die Kugel 19 bei verriegelten Trägerteilen 11, 13 auch nur mit deutlich weniger als ihrem halben Durchmesser in die jeweilige Vertiefung 16 im inneren Trägerteil 13 hinein. Dies hat zur Folge, daß bei gelöster Verriegelungs­einrichtung 14 die Trägerteile 11, 13 sich leicht gegeneinander verschieben lassen, ohne daß die Kugel 19 in der Vertiefung 16 festhängen kann. Sie weicht sehr leicht in den Hohlraum 24 aus.In the narrow side 33 of the inner carrier part 13 facing this slot 32, a latching recess 34 is worked out, into which the end 31 of the leg 30 lies when the end 31 and the latching recess 34 come to coincide. This latching recess 34 is formed in the region of the inner support part 13 up to which the maximum height adjustment of the backrest support 6 is to take place. This prevents that when the slide 20 is pressed in, that is to say when the locking device 14 is open, the backrest 7 with the outer carrier part 11 is accidentally pulled off the inner carrier part 13, that is to say that it is detached from the chair. A corresponding inclined surface configuration of the latching recess 34 ensures that the outer carrier part 11 can be pushed onto the inner carrier part 13 without the end 31 of the spring 26 being fixed in this latching recess 34. To mount the outer carrier part 11 on the inner carrier part 13, only the actuation button 27 has to be pressed towards the carrier part 11, so that the ball 19 can escape into the cavity 24. So that they do not pass through the opening 18 in the outside before the assembly of the two carrier parts 11, 13 Wall 22 of the outer support part 11 falls out, the diameter of this opening 18 is slightly smaller than the diameter of the ball 19. For this reason, the ball 19 protrudes with locked support parts 11, 13 with only significantly less than half its diameter in the respective recess 16 into the inner support part 13. The result of this is that when the locking device 14 is released, the carrier parts 11, 13 can be easily moved relative to one another without the ball 19 being able to get stuck in the recess 16. It escapes very easily into the cavity 24.

Die Trägerteile 11, 13 sind von einem Falten-Balg 35 umgeben, der einerseits an der Rückenlehne 7 und andererseits am Sitzträger 4 festgelegt ist. Der Betätigungsknopf 27 des Schiebers 20 ist durch eine entsprechende Öffnung 36 im Falten-­Balg nach außen geführt, so daß die Betätigung der Verriegelungseinrichtung 14 durch den Falten-­Balg 35 möglich ist.The carrier parts 11, 13 are surrounded by a bellows 35 which is fixed on the one hand on the backrest 7 and on the other hand on the seat carrier 4. The actuation button 27 of the slide 20 is guided to the outside through a corresponding opening 36 in the bellows, so that actuation of the locking device 14 by the bellows 35 is possible.

Da die Lage der Verriegelungseinrichtung 14 zur Rückenlehne 7 unveränderbar ist, und da der Betäti­gungsknopf 27 durch die Öffnung 36 im Falten-­Balg 35 aus letzterem herausgeführt ist, wird der Falten-Balg 35 im Bereich zwischen dem Betäti­gungsknopf 27 und der Rückenlehne 7 bei Höhenver­stellungen der Rückenlehne 7 nicht zusammenge­drückt. Um zu verhindern, daß der Falten-Balg 35 sich bei Höhenverstellungen schief zieht, da er auf dem Betätigungsknopf 27 gegenüberlie­genden Seite auch im oberen Bereich zusammengescho­ben bzw. auseinandergezogen wird, ist ein dem Verlauf des Falten-Balgs angepaßtes Füllstück 37 auf der dem Betätigungsknopf 27 entgegengesetzten Seite zwischen äußerem Trägerteil 11 und Falten-­Balg 35 angeordnet.Since the position of the locking device 14 to the backrest 7 is unchangeable, and since the actuation button 27 is led out of the latter through the opening 36 in the bellows 35, the bellows 35 is in the area between the actuation button 27 and the backrest 7 when the height is adjusted Backrest 7 is not compressed. In order to prevent the bellows 35 from pulling wrongly when adjusting the height, there it is pushed together or pulled apart on the side opposite to the operating button 27 in the upper region, a filler 37 adapted to the course of the bellows is arranged on the side opposite the operating button 27 between the outer carrier part 11 and the bellows 35.

Eine Demontage der Rückenlehne 7 zusammen mit dem äußeren Trägerteil 11 vom inneren Trägerteil 13 bei montiertem Falten-Balg 35 ist in der Weise möglich, daß durch den Falten-Balg 35 hindurch der Schenkel 30 der Feder 26 gemäß dem Kraftrich­tungspfeil 38 gegen das äußere Trägerteil 11 gedrückt wird. Anschließend wird der Schieber 20 durch Druck auf den Betätigungsknopf 27 gelöst und die Rückenlehne 7 mit dem äußeren Trägerteil 11 vom inneren Trägerteil 13 abgezogen. Da der Schen­kel 30 festgehalten wird, kann dessen Ende 31 beim Überfahren der Rastausnehmung 34 nicht in diese hineinschnappen, so daß das äußere Träger­teil 11 vollständig vom inneren Trägerteil 13 abgezogen werden kann, ohne daß es hierzu eines Werkzeuges bedarf. Der Falten-Balg 35 ist hierzu in üblicher Weise aus einem weichen Kunststoff mit sehr geringer Dicke, also erheblich dünner als 1 mm, hergestellt.Disassembly of the backrest 7 together with the outer support part 11 from the inner support part 13 with the bellows 35 installed is possible in such a way that the leg 30 of the spring 26 through the bellows 35 according to the direction of force arrow 38 against the outer support part 11 is pressed. Then the slide 20 is released by pressing the actuating button 27 and the backrest 7 with the outer support part 11 is pulled off the inner support part 13. Since the leg 30 is held in place, its end 31 cannot snap into the recess 34 when it is passed over it, so that the outer carrier part 11 can be completely removed from the inner carrier part 13 without the need for a tool. For this purpose, the bellows 35 is made in the usual way from a soft plastic with a very small thickness, that is to say considerably thinner than 1 mm.

Claims (7)

1. A chair, in particular an office chair, having a pedestal (1), a seat (5) supported thereon and a body rest (7) supported by a body rest support (6) in a vertically adjustable manner, the body rest support (6) being connected, on the one hand, to the body rest (7) and, on the other hand, to the seat (5), the body rest support (6) being telescopically composed of an inner and an outer support member (13, 11), an interlocking device (14) for the detachable interlocking of the two support members (11, 13) in varying positions relative to one another being provided on the body rest support (6), which interlocking device (14) is detachably pressed into an interlocking position by means of a prestressed spring (26), characterized in that the body rest support is formed as a backrest support (6) and the body rest is formed as a back rest (7) and in that the spring (26) in addition acts as extension safeguard for the support members (11, 13).
2. A chair according to patent claim 1, characterized in that one end (31) of the spring (26), being flexibly prestressed, enters a slot (32) in the outer support member (11), and in that this slot (32) is associated with a locking recess (34) in the inner support member (13).
3. A chair according to patent claim 1, characterized in that the back rest support (6) is surrounded by a concertina structure (35) which extends from the back rest (7) to the seat (5), and through which penetrates a control button (27) of the interlocking device (14).
4. A chair according to patent claim 3, characterized in that a lining (37) which matches the concertina structure (35) is arranged on the side of the back rest support (6) which is opposite the control button (27).
5. A chair according to patent claim 1, characterized in that the interlocking device (14) is formed by a ball notch arrangement wherein a ball (19) held in the outer support member (11) can be pressed, in each case, into one of several recesses (16) in the inner support member (13).
6. A chair according to patent claim 5, characterized in that the interlocking device (14) has a slide (20) with an inclined part (25) as abutment for the ball (19).
7. A chair according to patent claim 6, characterized in that the slide (20) is pressed by means of the prestressed spring (26) into an interlocked position in which the ball (19) is pressed by means of the inclined part (25) in the direction of the inner support member (13).
EP87111376A 1986-10-16 1987-08-06 Chair, particularly an office chair, having a backrest adjustable in height Expired - Lifetime EP0264555B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87111376T ATE60497T1 (en) 1986-10-16 1987-08-06 CHAIR, ESPECIALLY AN OFFICE CHAIR, WITH HEIGHT-ADJUSTABLE BACK.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3635244 1986-10-16
DE19863635244 DE3635244A1 (en) 1986-10-16 1986-10-16 CHAIR, ESPECIALLY OFFICE CHAIR, WITH HEIGHT-ADJUSTABLE BACKREST
DE8627648U DE8627648U1 (en) 1986-10-16 1986-10-16 Chair, especially office chair, with height-adjustable backrest

Publications (3)

Publication Number Publication Date
EP0264555A2 EP0264555A2 (en) 1988-04-27
EP0264555A3 EP0264555A3 (en) 1988-07-27
EP0264555B1 true EP0264555B1 (en) 1991-01-30

Family

ID=48614222

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87111376A Expired - Lifetime EP0264555B1 (en) 1986-10-16 1987-08-06 Chair, particularly an office chair, having a backrest adjustable in height

Country Status (8)

Country Link
US (1) US4786108A (en)
EP (1) EP0264555B1 (en)
JP (1) JPH0725076Y2 (en)
AT (1) ATE60497T1 (en)
CA (1) CA1279567C (en)
DE (3) DE3635244A1 (en)
GR (1) GR3001425T3 (en)
ZA (1) ZA876325B (en)

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Also Published As

Publication number Publication date
DE8627648U1 (en) 1988-09-01
EP0264555A3 (en) 1988-07-27
JPH0725076Y2 (en) 1995-06-07
GR3001425T3 (en) 1992-09-25
JPS6368837U (en) 1988-05-09
ATE60497T1 (en) 1991-02-15
US4786108A (en) 1988-11-22
DE3635244A1 (en) 1988-04-28
DE3767826D1 (en) 1991-03-07
EP0264555A2 (en) 1988-04-27
ZA876325B (en) 1988-03-02
CA1279567C (en) 1991-01-29

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