EP0743035B1 - Chair, particularly office-chair, with height-adjustable backrest - Google Patents

Chair, particularly office-chair, with height-adjustable backrest Download PDF

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Publication number
EP0743035B1
EP0743035B1 EP96107628A EP96107628A EP0743035B1 EP 0743035 B1 EP0743035 B1 EP 0743035B1 EP 96107628 A EP96107628 A EP 96107628A EP 96107628 A EP96107628 A EP 96107628A EP 0743035 B1 EP0743035 B1 EP 0743035B1
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EP
European Patent Office
Prior art keywords
rest
locking
slide
backrest
shell
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
EP96107628A
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German (de)
French (fr)
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EP0743035A1 (en
Inventor
Hermann Bock
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Martin Bock Kunststoffverarbeitung
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Martin Bock Kunststoffverarbeitung
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Publication of EP0743035A1 publication Critical patent/EP0743035A1/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • 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, in particular an office chair, with a height-adjustable backrest construction according to the generic term of claim 1, such an office chair is e.g. known from EP-A-0 210 584.
  • the aforementioned adjustable height Backrest structures that are usually vertical running backrest bracket attached to a chair frame, a vertically slidable backrest on the backrest support with a preferably padded, ergonomically shaped backrest shell and a manually triggered locking mechanism between the backrest support and backrest shell to fix the backrest shell on the backrest support at different heights.
  • a construction according to the labeling part of claim 1 proposed. Accordingly, is on the backrest shell at least one vertically extending row of locking projections arranged, the laterally open latching recesses between them form. On the backrest support is at least one locking slide across Height adjustment direction slidably guided to determine a Backrest height position releasably engages in one of the recesses. For height adjustment there is also a manually operable backrest support Trigger slide can be moved parallel to the height adjustment direction performed with the at least one locking slide via a wedge thrust gear is coupled.
  • the advantage of this design is that all moving parts of the Locking mechanism - namely the locking and the trigger slide - directly on Backrest supports are attached. So the unity can be Backrest support, locking slide and release slide in a manufacturing-friendly Pre-assemble way and can then with the backrest be completed. Through the gear coupling between the locking slide and the trigger slide is the latching of the backrest solvable by a simple sliding movement of the trigger slide, which the required ease of use.
  • the discussed simple construction of the subject of the invention forms one Basis for the backrest shell, the backrest support, the at least a locking slide and the trigger slide made of plastic material can be injection molded and all guide elements for mutual Sliding guide of the aforementioned parts in one piece with the respectively assigned Parts can be formed as indicated in claim 2 is.
  • This measure considerably increases the ease of installation, since the individual parts only by mutual insertion into the corresponding guide elements can be assembled. Time consuming Assembly steps such as screw connections or the like can be omitted.
  • Claim 3 teaches a particularly stable design of the heavily used Backrest support, which in cross section essentially Should be H-shaped. Due to this cross-sectional shape Backrest support statically very stiff, with that of the H side legs and the areas bounded by this H-center leg assembly areas to accommodate the locking mechanism and the trigger slide create.
  • the height-adjustable backrest construction according to the invention builds very compact.
  • An office chair according to the invention is in the accompanying drawing only the height-adjustable backrest construction is shown. Otherwise the office chair can be used in any usual way, e.g. with a roller frame, a height-adjustable rotating column, one Seat support and an upholstered seat thereon designed be.
  • a backrest support 1 which is complete and in one piece is made of injection molded plastic.
  • the end is the vertically extending backrest support 1 with an angle 2 provided, in which a receptacle 3 for a corresponding fastener is molded on the seat support, not shown.
  • holes 4 in the bend 2 can be screws for rigid connection of the backrest support 1 can be used on the seat support.
  • Backrest 5 guided vertically. It consists of one anatomically shaped backrest shell 6 facing the user Side is provided with padding 7. On the back is the backrest 5 is provided with a cover shell 8, the backrest support 1 via an opening 9 between the backrest 6 and cover shell 8 protrudes into the space 10 between these two parts.
  • the backrest support 1 is covered on a horizontal section plane a flat H-shaped cross section on, whereby two longitudinally extending H-side legs 12, 13 and an H center leg 14 connecting them become.
  • On the two mutually facing outer sides 15 of the side legs 12, 13 are each facing the backrest shell 6
  • Edge protruding projection protrusions 16 formed in one piece, around the vertical guide rails 17 on the backrest shell 6 reach around.
  • the guide strips 17 are in one piece on the Back 18 of the backrest shell 6 molded.
  • a vertically running double row of locking projections 19 is arranged, the latching recesses 20 which are laterally open between them form.
  • stop projections 21, 22 are also provided, which are still in to be explained in more detail after the assembly of the backrest structure the displacement movement of the backrest shell 6 on the backrest support 1 limit up and down.
  • the double row of locking projections 19 together with the stop projections 21 and 22 strictly designed symmetrically to the central longitudinal plane M of the chair.
  • the locking slides 23, 24 have a flat cuboidal slider body 27 on the to the median longitudinal plane M sides each locking lugs 28 in one piece are molded.
  • the slide body 27 On the back facing away from the latch 28 the slide body 27 each have integrally molded centering pins 29 on which a helical compression spring 30 is placed at one end is. The respective helical compression spring is supported at its other end 30 in pocket-shaped depressions 31 in the respective H-side legs 12, 13 from.
  • the locking slides 23, 24 are in the direction by the helical compression springs 30 to the central longitudinal plane M - i.e. in the direction of engagement E - spring-loaded, around the engagement position of the locking lugs 28 in the respective locking recesses 20 and thus a stable fixing of the backrest 5 on Ensure backrest support 1.
  • Trigger 11 is on the outside 32 of the H-center leg 14 of the backrest support 1, a manually operated trigger slide 33 intended.
  • This has a cuboid-shaped shell Main part 34, whose parallel to the height adjustment direction H Side chews 35 are provided with guide webs 36 pointing inwards are.
  • the latter each engage in a pair of hook-shaped guide lugs 37 on the outside 32 of the H center leg 14 of the backrest support 1, which is used to form a sufficient guide length a clear distance in relation to the height adjustment direction H is arranged are.
  • the Trigger slide 33 In the area of its lower end, which emerges from the intermediate space 10 protrudes downwards between backrest 6 and cover shell 8, the Trigger slide 33 on an elevation 38, which acts as a handle part the trigger slide 33 is used.
  • the main part 34 sits in two in relation to Middle longitudinal plane M symmetrically arranged coupling links 39, 40, the on their outer sides facing away from each other with a wedge bevel 41 are provided.
  • the two wedge slopes 41 are directed so that they form an acute angle that opens downwards.
  • the ends of the coupling members 39, 40 each have an outward-facing one Stop leg 42 on the associated wedge 41 limit at its inner end. Between the two coupling links 39, 40 also leaves a spacing gap 43.
  • the two wedge bevels 41 are a functional part of the release slide 33 and the locking slides 23, 24 formed wedge thrust gear. These two functional parts are coupled via one each Coupling pin 45, which protrudes from the upper side 46 of the slide body 27, reaches through the H center leg 14 of the backrest support 1 and with of the associated wedge bevel 41 is in contact.
  • the penetration the coupling pins 45 of the two locking slides 23, 24 take place via a common, Recess 47 transverse to the height adjustment direction H in H-middle leg 14, starting from its center a parallel has extension 48 extending upward to the height adjustment direction H.
  • the recess 47 is thus T-shaped in plan view (Fig. 3, 4).
  • the highest position of the backrest 5 is as an example Backrest support 1 shown.
  • the trigger slide 33 is in its downward pushed rest position, in which the locking slide 23, 24 engage with their locking lugs 28 in the lowest locking recess 20.
  • the coupling pins 45 of the locking slide 23, 24 lie on the stop legs 42 of the coupling links 39, 40, whereby the Rest position of the trigger slide 33 is defined.
  • the trigger slide 33 is the trigger path A (Fig. 4), which through the above the coupling links 39, 40 molded on the backrest support 1 stop pins 44 is limited pushed up. Via the gear coupling of the bevel 41 with the coupling pins 45, the locking slide 23, 24 are pressed outwards, so that their locking lugs 28 are lifted out of the locking recesses 20 become.
  • the backrest 5 can then, for example, be shown in FIG. 4 lowest position - or in one of the in between lying recesses defined rest positions - are spent.
  • the trigger slide 33 By pushing the trigger slide 33 back into its rest position (Fig. 3) the locking slide 23, 24 under the influence of the coil springs 30 pushed inwards so that their locking lugs 28 in again immerse the corresponding recesses 20.
  • the backrest shell 6, the Backrest support 1, the locking slide 23, 24 and the trigger slide 33 with all its guide elements, stops, projections and the like are made in one piece from injection molded plastic, so that the height-adjustable backrest construction with a conceivably small one Number of individual parts is sufficient.

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  • Chairs Characterized By Structure (AREA)
  • Special Chairs (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Description

Die Erfindung betrifft einen Stuhl, insbesondere einen Bürostuhl, mit einer höhenverstellbaren Rückenlehnenkonstruktion nach dem Oberbegriff des Anspruches 1, ein solcher Bürostuhl ist z.B. aus der EP-A-0 210 584 bekannt.The invention relates to a chair, in particular an office chair, with a height-adjustable backrest construction according to the generic term of claim 1, such an office chair is e.g. known from EP-A-0 210 584.

Wie bei Bürostühlen allgemein bekannt ist, weisen diese zur Anpassung der Rückenlehnenposition an die Körpergröße des jeweiligen Benutzers und damit zur Verbesserung des Sitzkomforts die eingangs erwähnten höhenverstellbaren Rückenlehnenkonstruktionen auf, die in der Regel einen vertikal verlaufenden, an einem Stuhlgestell befestigten Rückenlehnenträger, eine am Rückenlehnenträger vertikal verschiebbar geführte Rückenlehne mit einer vorzugsweise gepolsterten, körpergerecht geformten Lehnenschale und einen manuell auslösbaren Rastmechanismus zwischen Rückenlehnenträger und Lehnenschale zur Festlegung der Lehnenschale am Rückenlehnenträger in unterschiedlichen Höhenstellung auf.As is well known for office chairs, these point to adjustment the backrest position to the height of the respective user and thus to improve the seating comfort, the aforementioned adjustable height Backrest structures that are usually vertical running backrest bracket attached to a chair frame, a vertically slidable backrest on the backrest support with a preferably padded, ergonomically shaped backrest shell and a manually triggered locking mechanism between the backrest support and backrest shell to fix the backrest shell on the backrest support at different heights.

Bei solchen höhenverstellbaren Rückenlehnenkonstruktionen besteht nun grundsätzlich die Forderung, diese mit möglichst geringem konstruktiven Aufwand und hoher Montagefreundlichkeit zu gestalten, dabei jedoch gleichzeitig einen hohen Bedienungskomfort hinsichtlich der Betätigung der Höhenverstellung zu erzielen. Such height-adjustable backrest structures now exist basically the requirement to keep this with the least possible constructive To design effort and ease of assembly, however at the same time a high level of operating comfort with regard to the actuation of To achieve height adjustment.

Zur Lösung dieser Problematik wird eine Konstruktion laut dem Kennzeichnungsteil des Anspruches 1 vorgeschlagen. Demnach ist an der Lehnenschale mindestens eine vertikal verlaufende Reihe von Rastvorsprüngen angeordnet, die zwischen sich jeweils seitlich offene Rastausnehmungen bilden. Am Rückenlehnenträger ist mindestens ein Rastschieber quer zur Höbenverstellrichtung verschiebbar geführt, der zur Festlegung einer Rückenlehnen-Höhenposition in eine der Rastausnehmungen lösbar eingreift. Zur Höhenverstellung ist am Rückenlehnenträger ferner ein manuell betätigbarer Auslöseschieber parallel zur Höhenverstellrichtung verschiebbar geführt, der mit dem mindestens einen Rastschieber über ein Keilschubgetriebe gekoppelt ist.To solve this problem, a construction according to the labeling part of claim 1 proposed. Accordingly, is on the backrest shell at least one vertically extending row of locking projections arranged, the laterally open latching recesses between them form. On the backrest support is at least one locking slide across Height adjustment direction slidably guided to determine a Backrest height position releasably engages in one of the recesses. For height adjustment there is also a manually operable backrest support Trigger slide can be moved parallel to the height adjustment direction performed with the at least one locking slide via a wedge thrust gear is coupled.

Von Vorteil bei dieser Konstruktion ist, daß alle beweglichen Teile des Rastmechanismus - nämlich der Rast- und der Auslöseschieber - direkt am Rückenlehnenträger angebracht sind. Damit läßt sich die Einheit als Rückenlehnenträger, Rastschieber und Auslöseschieber in herstellungsfreundlicher Weise vormontieren und kann anschließend mit der Rückenlehne komplettiert werden. Durch die Getriebekopplung zwischen dem Rastschieber und dem Auslöseschieber ist die Verrastung der Rückenlehne durch eine einfache Schiebebewegung des Auslöseschiebers lösbar, was den geforderten Bedienungskomfort mit sich bringt.The advantage of this design is that all moving parts of the Locking mechanism - namely the locking and the trigger slide - directly on Backrest supports are attached. So the unity can be Backrest support, locking slide and release slide in a manufacturing-friendly Pre-assemble way and can then with the backrest be completed. Through the gear coupling between the locking slide and the trigger slide is the latching of the backrest solvable by a simple sliding movement of the trigger slide, which the required ease of use.

Die erörterte einfache Konstruktion des Erfindungsgegenstandes bildet eine Basis dafür, daß die Lehnenschale, der Rückenlehnenträger, der mindestens eine Rastschieber und der Auslöseschieber aus Kunststoff-Material spritzgegossen werden können und alle Führungselemente zur gegenseitigen Schiebeführung der vorgenannten Teile einstückig mit den jeweils zugeordneten Teilen ausgebildet sein können, wie dies in Anspruch 2 angegeben ist. Diese Maßnahme erhöht in beträchtlichem Maße die Montagefreundlichkeit, da die Einzelteile lediglich durch gegenseitiges Einschieben in die entsprechenden Führungselemente zusammengefügt werden können. Zeitraubende Montageschritte, wie Verschraubungen oder dergleichen können entfallen. The discussed simple construction of the subject of the invention forms one Basis for the backrest shell, the backrest support, the at least a locking slide and the trigger slide made of plastic material can be injection molded and all guide elements for mutual Sliding guide of the aforementioned parts in one piece with the respectively assigned Parts can be formed as indicated in claim 2 is. This measure considerably increases the ease of installation, since the individual parts only by mutual insertion into the corresponding guide elements can be assembled. Time consuming Assembly steps such as screw connections or the like can be omitted.

Anspruch 3 lehrt eine besonders stabile Ausgestaltung des stark beanspruchten Rückenlehnenträgers, der im Querschnitt im wesentlichen H-förmig ausgebildet sein soll. Durch diese Querschnittsform ist der Rückenlehnenträger statisch sehr steif, wobei die von den H-Seitenschenkel und den diesen verbindenden H-Mittenschenkel umgrenzten Bereiche Montageräume zur Aufnahme des Rastmechanismus und des Auslöseschiebers schaffen. Die erfindungsgemäße höhenverstellbare Rückenlehnenkonstruktion baut also sehr kompakt.Claim 3 teaches a particularly stable design of the heavily used Backrest support, which in cross section essentially Should be H-shaped. Due to this cross-sectional shape Backrest support statically very stiff, with that of the H side legs and the areas bounded by this H-center leg assembly areas to accommodate the locking mechanism and the trigger slide create. The height-adjustable backrest construction according to the invention builds very compact.

Die verbleibenden Ansprüche lehren konstruktive Einzelheiten der höhenverstellbaren Rückenlehnenkonstruktion.The remaining claims teach constructive details of the height adjustable Backrest construction.

Weitere Merkmale, Einzelheiten und Vorteile des Erfindungsgenstandes sind ferner der nachfolgenden Beschreibung entnehmbar, in der ein Ausführungsbeispiel der Erfindung anhand der beigefügten Zeichnungen näher erläutert wird. Es zeigen

Fig. 1
einen durch die Mittellängsebene eines Bürostuhles gelegten Vertikalschnitt einer höhenverstellbaren Rückenlehnenkonstruktion mit der Rückenlehne in höchster Position,
Fig. 2
einen Vertikalschnitt analog Fig. 1 mit der Rückenlehne in niedrigster Position,
Fig. 3
eine Ansicht der Rückenlehnenkonstruktion aus Pfeilrichtung III nach Fig. 1,
Fig. 4
eine Ansicht der Rückenlehnerkonstruktion aus Pfeilrichtung IV nach Fig. 2,
Fig. 5
einen Horizontalschnitt durch die Rückenlehnenkonstruktion entlang der Schnittlinie V-V nach Fig. 4 und
Fig. 6
eine Draufsicht auf den Rückenlehnenträger in Vertikalrichtung.
Further features, details and advantages of the subject matter of the invention can also be gathered from the following description, in which an exemplary embodiment of the invention is explained in more detail with reference to the accompanying drawings. Show it
Fig. 1
a vertical section through the central longitudinal plane of an office chair of a height-adjustable backrest construction with the backrest in the highest position,
Fig. 2
1 with the backrest in the lowest position,
Fig. 3
2 shows a view of the backrest structure from arrow direction III according to FIG. 1,
Fig. 4
2 shows a view of the backrest construction from arrow direction IV according to FIG. 2,
Fig. 5
a horizontal section through the backrest construction along the section line VV of Fig. 4 and
Fig. 6
a plan view of the backrest support in the vertical direction.

Von einem erfindungsgemäßen Bürostuhl ist in der beigefügten Zeichnung lediglich die höhenverstellbare Rückenlehnerkonstruktion dargestellt. Ansonsten kann der Bürostuhl in jeder üblichen Weise, z.B. mit einem Rollengestell, einer darauf sitzenden höhenverstellbaren Drehsäule, einem Sitzträger und einer darauf befindlichen gepolsterten Sitzfläche ausgestaltet sein.An office chair according to the invention is in the accompanying drawing only the height-adjustable backrest construction is shown. Otherwise the office chair can be used in any usual way, e.g. with a roller frame, a height-adjustable rotating column, one Seat support and an upholstered seat thereon designed be.

Wie nun aus Fig. 1 deutlich wird, weist die Rückenlehnenkonstruktion als tragendes Teil einen Rückenlehnenträger 1 auf, der vollständig und einstückig aus spritzgegossenem Kunststoff gefertigt ist. An seinem unteren Ende ist der vertikal verlaufende Rückenlehnenträger 1 mit einer Abwinklung 2 versehen, in die eine Aufnahme 3 für ein entsprechendes Befestigungselement am nicht dargestellten Sitzträger eingeformt ist. In die vertikal und rechtwinklig zur Aufnahme 3 verlaufenden Bohrungen 4 in der Abwinklung 2 können Schrauben zur starren Anbindung des Rückenlehnenträgers 1 an den Sitzträger eingesetzt werden.As is now clear from Fig. 1, the backrest construction as supporting part a backrest support 1, which is complete and in one piece is made of injection molded plastic. At its bottom The end is the vertically extending backrest support 1 with an angle 2 provided, in which a receptacle 3 for a corresponding fastener is molded on the seat support, not shown. In the vertically and at right angles to the receptacle 3 holes 4 in the bend 2 can be screws for rigid connection of the backrest support 1 can be used on the seat support.

Am Rückenlehnenträger 1 ist eine in den Zeichnungen nur teilweise dargestellte Rückenlehne 5 vertikal verschiebbar geführt. Sie besteht aus einer körpergerecht geformten Lehnenschale 6, die auf ihrer dem Benutzer zugewandten Seite mit einer Polsterung 7 versehen ist. Auf ihrer Rückseite ist die Rückenlehne 5 mit einer Abdeckschale 8 versehen, wobei der Rückenlehnenträger 1 über eine Öffnung 9 zwischen Lehnen- 6 und Abdeckschale 8 in den Zwischenraum 10 zwischen diesen beiden Teilen hineinragt.On the backrest support 1 is only partially shown in the drawings Backrest 5 guided vertically. It consists of one anatomically shaped backrest shell 6 facing the user Side is provided with padding 7. On the back is the backrest 5 is provided with a cover shell 8, the backrest support 1 via an opening 9 between the backrest 6 and cover shell 8 protrudes into the space 10 between these two parts.

Zwischen Rückenlehnenträger 1 und Lehnenschale 6 ist ein als Ganzes mit 11 bezeichneter, manuell auslösbarer Rastmechanismus vorgesehen, um die Lehnenschale 6 - und damit die Rückenlehne 5 - am Rückenlehnenträger 1 in unterschiedlichen Höhenstellungen festzulegen. Dieser Rastmechanismus 11 wird im folgenden noch näher beschrieben.Between the backrest support 1 and the backrest shell 6 is a whole 11 designated, manually triggered locking mechanism provided to the Backrest shell 6 - and thus the backrest 5 - on the backrest support 1 to be set at different heights. This locking mechanism 11 is described in more detail below.

Wie aus Fig. 5 und 6 deutlich wird, weist der Rückenlehnenträger 1 bezogen auf eine horizontale Schnittebene einen flach H-förmigen Querschnitt auf, wodurch zwei sich längs in Vertikalrichtung erstreckende H-Seitenschenkel 12, 13 und ein diese verbindender H-Mittenschenkel 14 gebildet werden. An den beiden einander abgewandten Außenseiten 15 der Seitenschenkel 12, 13 sind jeweils an deren der Lehnenschale 6 zugewandten Rand nach außen abstehende Führungsvorsprünge 16 einstückig angeformt, um die in Vertikalrichtung verlaufende Führungsleisten 17 an der Lehnenschale 6 herumgreifen. Die Führungsleisten 17 sind einstückig an die Rückseite 18 der Lehnenschale 6 angeformt. Durch den Eingriff der Führungsvorsprünge 16 in die Führungsleisten 17 ist die Rückenlehne 5 in Vertikalrichtung verschiebbar am Rückenlehnenträger 1 geführt.As is clear from FIGS. 5 and 6, the backrest support 1 is covered on a horizontal section plane a flat H-shaped cross section on, whereby two longitudinally extending H-side legs 12, 13 and an H center leg 14 connecting them become. On the two mutually facing outer sides 15 of the side legs 12, 13 are each facing the backrest shell 6 Edge protruding projection protrusions 16 formed in one piece, around the vertical guide rails 17 on the backrest shell 6 reach around. The guide strips 17 are in one piece on the Back 18 of the backrest shell 6 molded. By engaging the guide tabs 16 in the guide rails 17 is the backrest 5 in Movable in the vertical direction on the backrest support 1.

Um nun die Rückenlehne 5 in einer bestimmten Höhenstellung am Rückenlehnenträger 1 festzulegen, ist auf der Rückseite 18 der Lehnenschale 6 ferner eine vertikal verlaufende Doppelreihe von Rastvorsprüngen 19 angeordnet, die zwischen sich jeweils seitlich offene Rastausnehmungen 20 bilden. Am oberen und unteren Ende diese Doppelreihe von Rastvorsprüngen 19 sind ferner Anschlagvorsprünge 21, 22 vorgesehen, die in noch näher zu erläuternder Weise nach der Montage der Rückenlehnenkonstruktion die Verschiebebewegung der Lehnenschale 6 am Rückenlehnenträger 1 nach oben und unten begrenzen. Im übrigen ist die Doppelreihe von Rastvorsprüngen 19 zusammen mit den Anschlagvorsprüngen 21 und 22 streng symmetrisch zur Mittel-Längsebene M des Stuhles gestaltet.Around the backrest 5 in a certain height position on the backrest support 1 is to be defined on the back 18 of the backrest shell 6 furthermore a vertically running double row of locking projections 19 is arranged, the latching recesses 20 which are laterally open between them form. At the top and bottom of this double row of locking projections 19 stop projections 21, 22 are also provided, which are still in to be explained in more detail after the assembly of the backrest structure the displacement movement of the backrest shell 6 on the backrest support 1 limit up and down. Otherwise, the double row of locking projections 19 together with the stop projections 21 and 22 strictly designed symmetrically to the central longitudinal plane M of the chair.

Links und rechts der Doppelreihe von Rastvorsprüngen 19 sind auf gleicher Höhe am Rückenlehnenträger 1 Rastschieber 23, 24 angeordnet, die jeweils an der nach vorne zur Lehnenschale 6 weisenden Innenseite 25 des H-Mittenschenkels 14 in leistenartigen Führungswinkeln 26 quer zur Höhenverstellrichtung H verschiebbar geführt sind. Die Rastschieber 23, 24 weisen dabei einen flach quaderförmigen Schieberkörper 27 auf, an dessen zur Mittellängsebene M hinweisenden Seiten jeweils Rastnasen 28 einstückig angeformt sind. Auf der der Rastnase 28 abgewandten Rückseite weisen die Schieberkörper 27 jeweils einstückig angeformte Zentrierstifte 29 auf, auf denen eine Schraubendruckfeder 30 mit ihrem einen Ende aufgesetzt ist. Mit ihrem anderen Ende stützt sich die jeweilige Schraubendruckfeder 30 in taschenförmigen Vertiefungen 31 in den jeweiligen H-Seitenschenkeln 12, 13 ab. Left and right of the double row of locking projections 19 are on the same Height on the backrest support 1 locking slide 23, 24 arranged in each case on the inside 25 of the front facing the backrest shell 6 H-center leg 14 in strip-like guide angles 26 transverse to the height adjustment direction H are guided. The locking slides 23, 24 have a flat cuboidal slider body 27 on the to the median longitudinal plane M sides each locking lugs 28 in one piece are molded. On the back facing away from the latch 28 the slide body 27 each have integrally molded centering pins 29 on which a helical compression spring 30 is placed at one end is. The respective helical compression spring is supported at its other end 30 in pocket-shaped depressions 31 in the respective H-side legs 12, 13 from.

Durch die Schraubendruckfedern 30 sind die Rastschieber 23, 24 in Richtung zur Mittellängsebene M - also in Eingriffsrichtung E - federbeaufschlagt, um die Eingriffsstellung der Rastnasen 28 in die jeweiligen Rastausnehmungen 20 und damit eine stabile Festlegung der Rückenlehne 5 am Rückenlehnenträger 1 sicherzustellen.The locking slides 23, 24 are in the direction by the helical compression springs 30 to the central longitudinal plane M - i.e. in the direction of engagement E - spring-loaded, around the engagement position of the locking lugs 28 in the respective locking recesses 20 and thus a stable fixing of the backrest 5 on Ensure backrest support 1.

Um bei einer gewünschten Höhenverstellung der Rückenlehne 5 den Rastmechanismus 11 auszulösen, ist auf der Außenseite 32 des H-Mittenschenkels 14 des Rückenlehnenträgers 1 ein manuell betätigbarer Auslöseschieber 33 vorgesehen. Dieser weist ein als quaderförmige Schale ausgebildetes Hauptteil 34 auf, dessen parallel zur Höhenverstellrichtung H verlaufenden Seitenkauten 35 mit nach innen weisenden Führungsstegen 36 versehen sind. Letztere greifen jeweils in ein Paar von hakenförmigen Führungsnasen 37 an der Außenseite 32 des H-Mittenschenkels 14 des Rückenlehnenträgers 1 ein, die zur Bildung einer ausreichenden Führungslänge mit deutlichem Abstand bezogen auf die Höhenverstellrichtung H angeordnet sind. Im Bereich seines unteren Endes, das aus dem Zwischenraum 10 zwischen Lehnen- 6 und Abdeckschale 8 nach unten hervorsteht, weist der Auslöseschieber 33 eine Erhebung 38 auf, die als Griffteil zur Betätigung des Auslöseschiebers 33 dient.To the locking mechanism at a desired height adjustment of the backrest 5 Trigger 11 is on the outside 32 of the H-center leg 14 of the backrest support 1, a manually operated trigger slide 33 intended. This has a cuboid-shaped shell Main part 34, whose parallel to the height adjustment direction H Side chews 35 are provided with guide webs 36 pointing inwards are. The latter each engage in a pair of hook-shaped guide lugs 37 on the outside 32 of the H center leg 14 of the backrest support 1, which is used to form a sufficient guide length a clear distance in relation to the height adjustment direction H is arranged are. In the area of its lower end, which emerges from the intermediate space 10 protrudes downwards between backrest 6 and cover shell 8, the Trigger slide 33 on an elevation 38, which acts as a handle part the trigger slide 33 is used.

An seinem oberen Ende setzt sich das Hauptteil 34 in zwei bezogen zur Mittellängsebene M symmetrisch angeordnete Koppelglieder 39, 40 fort, die an ihren einander abgewandten Außenseiten jeweils mit einer Keilschräge 41 versehen sind. Die beiden Keilschrägen 41 sind so gerichtet, daß sie einen sich nach unten öffnenden spitzen Winkel bilden. An ihren freien Enden weisen die Koppelglieder 39, 40 jeweils einen nach außen gerichteten Anschlagschenkel 42 auf, die die jeweils zugeordnete Keilschräge 41 an ihrem innenliegenden Ende begrenzen. Zwischen den beiden Koppelglieder 39, 40 verbleibt im übrigen ein Abstandsspalt 43.At its upper end, the main part 34 sits in two in relation to Middle longitudinal plane M symmetrically arranged coupling links 39, 40, the on their outer sides facing away from each other with a wedge bevel 41 are provided. The two wedge slopes 41 are directed so that they form an acute angle that opens downwards. At their free The ends of the coupling members 39, 40 each have an outward-facing one Stop leg 42 on the associated wedge 41 limit at its inner end. Between the two coupling links 39, 40 also leaves a spacing gap 43.

Die beiden Keilschrägen 41 sind ein Funktionsteil des zwischen Auslöseschieber 33 und den Rastschiebern 23, 24 gebildeten Keilschubgetriebes. Die Kopplung dieser beiden Funktionsteile erfolgt über jeweils einen Koppelstift 45, der von der Oberseite 46 des Schieberkörpers 27 absteht, den H-Mittenschenkel 14 des Rückenlehnenträgers 1 durchgreift und mit der jeweils zugeordneten Keilschräge 41 in Kontakt steht. Der Durchgriff der Koppelstifte 45 der beiden Rastschieber 23, 24 erfolgt über eine gemeinsame, quer zur Höhenverstellrichtung H verlaufende Ausnehmung 47 im H-Mittenschenkel 14, die von ihrem Mittelpunkt ausgehend einen parallel zur Höhenverstellrichtung H nach oben verlaufenden Fortsatz 48 aufweist. Die Ausnehmung 47 ist also in Draufsicht (Fig. 3, 4) T-förmig gestaltet. Im Bereich des Fortsatzes 48 liegt eine einstückig an den Rückenlehnenträger 1 angeformte Rastfederzunge 49, die an ihrem freien Ende 50 eine aus dem Querschnitt des H-Mittenschenkels 14 nach vorne zur Lehnenschale 6 weisende Verdickung 51 aufweist. Letztere läuft damit zwischen den beiden Reihen von Rastvorsprüngen 19 an der Lehnenschale 6. Die Verdickung 51 wirkt mit den beiden Anschlagvorsprüngen 21, 22 an der Lehnenschale 6 zur Begrenzung des Höhenverstellbereiches der Rückenlehne 5 zusammen.The two wedge bevels 41 are a functional part of the release slide 33 and the locking slides 23, 24 formed wedge thrust gear. These two functional parts are coupled via one each Coupling pin 45, which protrudes from the upper side 46 of the slide body 27, reaches through the H center leg 14 of the backrest support 1 and with of the associated wedge bevel 41 is in contact. The penetration the coupling pins 45 of the two locking slides 23, 24 take place via a common, Recess 47 transverse to the height adjustment direction H in H-middle leg 14, starting from its center a parallel has extension 48 extending upward to the height adjustment direction H. The recess 47 is thus T-shaped in plan view (Fig. 3, 4). In the area of the extension 48 there is one piece on the backrest support 1 molded detent spring tongue 49, a at its free end 50 from the cross section of the H center leg 14 forward to the backrest shell 6 shows thickening 51. The latter thus runs between the two rows of locking projections 19 on the backrest shell 6. The thickening 51 acts with the two stop projections 21, 22 on the backrest shell 6 to limit the height adjustment range of the backrest 5 together.

Die Funktionsweise der höhenverstellbaren Rückenlehnenkonstruktion ist wie folgt zu beschreiben:The functionality of the height-adjustable backrest construction is to be described as follows:

In Fig. 3 ist als Beispiel die höchste Stellung der Rückenlehne 5 am Rückenlehnenträger 1 gezeigt. Der Auslöseschieber 33 befindet sich in seiner nach unten geschobenen Ruheposition, in der die Rastschieber 23, 24 mit ihren Rastnasen 28 in die unterste Rastausnehmung 20 eingreifen. Die Koppelstifte 45 der Rastschieber 23, 24 liegen dabei an den Anschlagschenkeln 42 der Koppelglieder 39, 40 an, wodurch gleichzeitig die Ruhestellung des Auslöseschiebers 33 definiert ist.In Fig. 3, the highest position of the backrest 5 is as an example Backrest support 1 shown. The trigger slide 33 is in its downward pushed rest position, in which the locking slide 23, 24 engage with their locking lugs 28 in the lowest locking recess 20. The coupling pins 45 of the locking slide 23, 24 lie on the stop legs 42 of the coupling links 39, 40, whereby the Rest position of the trigger slide 33 is defined.

Zur Höhenverstellung der Rückenlehne 5 wird der Auslöseschieber 33 um den Auslöseweg A (Fig. 4), der durch die oberhalb der Koppelglieder 39, 40 am Rückenlehnenträger 1 angeformten Anschlagstifte 44 begrenzt ist, nach oben geschoben. Über die Getriebekopplung der Keilschrägen 41 mit den Koppelstiften 45 werden die Rastschieber 23, 24 nach außen gedrückt, so daß deren Rastnasen 28 aus den Rastausnehmungen 20 herausgehoben werden. Die Rückenlehne 5 kann dann beispielsweise in die in Fig. 4 gezeigte niedrigste Position - oder auch in eine der durch die dazwischen liegende Rastausnehmungen definierten Rastpositionen - verbracht werden. Durch das Zurückschieben des Auslöseschiebers 33 in seine Ruheposition (Fig. 3) werden die Rastschieber 23, 24 unter dem Einfluß der Schraubenfedern 30 nach innen geschoben, so daß ihre Rastnasen 28 wieder in die entsprechenden Rastausnehmungen 20 eintauchen.To adjust the height of the backrest 5, the trigger slide 33 is the trigger path A (Fig. 4), which through the above the coupling links 39, 40 molded on the backrest support 1 stop pins 44 is limited pushed up. Via the gear coupling of the bevel 41 with the coupling pins 45, the locking slide 23, 24 are pressed outwards, so that their locking lugs 28 are lifted out of the locking recesses 20 become. The backrest 5 can then, for example, be shown in FIG. 4 lowest position - or in one of the in between lying recesses defined rest positions - are spent. By pushing the trigger slide 33 back into its rest position (Fig. 3) the locking slide 23, 24 under the influence of the coil springs 30 pushed inwards so that their locking lugs 28 in again immerse the corresponding recesses 20.

Zur Montage der höhenverstellbaren Rückenlehnenkonstruktion sind folgende Hinweise zu geben:The following are for mounting the height-adjustable backrest construction To give hints:

Es kann zuerst der Rückenlehnenträger 1 mit Auslöseschieber 33 und Rastschiebern 23, 24 einschließlich der Schraubendruckfeder 30 komplett vormontiert werden, so daß die in Fig. 3 dargestellte Konfiguration erzielt wird. Zum Aufsetzen der Rückenlehne 5 muß diese lediglich aufgeschoben und der Auslöseschieber 33 betätigt werden. Dabei läuft die Unterseite des unteren Anschlagvorsprunges 22 an der Lehnenschale 6 auf die Verdickung 51 der Rastfederzunge 49 auf. Damit die Rastfederzunge 49 dann einfacher über den Anschlagvorsprung 22 hinweggeführt werden kann, ist dieser an seiner Unterseite mit einer Abschrägung 52 versehen. Sobald die Rastfederzunge 49 in den Bereich zwischen den Anschlagvorsprüngen 21, 22 und den Rastvorsprüngen 19 eintaucht, ist die Rückenlehne 5 gegen ein unbeabsichtigtes Abziehen gesichert.It can first the backrest support 1 with trigger slide 33 and locking slides 23, 24 including the helical compression spring 30 completely pre-assembled are achieved so that the configuration shown in Fig. 3 is achieved becomes. To put the backrest 5 on, it only has to be pushed on and the trigger slide 33 are actuated. The bottom of the lower stop projection 22 on the backrest shell 6 on the thickening 51 of the detent spring tongue 49. So that the detent spring tongue 49 is easier can be passed over the stop projection 22, this is on bevelled on its underside. Once the detent tongue 49 in the area between the stop projections 21, 22 and immerses the locking projections 19, the backrest 5 is against an unintentional Pull off secured.

Zur Demontage der Rückenlehne 5 muß lediglich deren Abdeckschale 8 abgenommen und die Rastfederzunge 49 durch ein geeignetes Werkzeug nach hinten weggezogen werden. Dann kann durch Betätigung des Auslöseschiebers der Rastmechanismus 11 ausgelöst und die Rückenlehne 5 nach oben weggezogen werden.To dismantle the backrest 5, only its cover shell 8 has to be removed and the detent spring tongue 49 by a suitable tool be pulled away behind. Then you can operate the trigger slide the locking mechanism 11 triggered and the backrest 5 upwards be pulled away.

Abschließend ist darauf hinzuweisen, daß die lehnenschale 6, der Rückenlehnenträger 1, die Rastschieber 23, 24 und der Auslöseschieber 33 mit allen ihren Führungselementen, Anschlägen, Vorsprüngen und dergleichen einstückig aus spritzgegossenem Kunststoff hergestellt sind, so daß die höhenverstellbare Rückenlehnenkonstruktion mit einer denkbar geringen Anzahl an Einzelteilen auskommt.In conclusion, it should be noted that the backrest shell 6, the Backrest support 1, the locking slide 23, 24 and the trigger slide 33 with all its guide elements, stops, projections and the like are made in one piece from injection molded plastic, so that the height-adjustable backrest construction with a conceivably small one Number of individual parts is sufficient.

Claims (11)

  1. A chair, in particular an office chair, with an adjustable-height back-rest construction, comprising
    a vertical back-rest support (1) fixed to a chair stand,
    a back-rest (5) guided on the back-rest support (1) for vertical displacement m the direction of height adjustment (H) and having a preferably upholstered back-rest shell (6) of ergonomic shape, and
    a manually operated locking mechanism (11) acting between the back-rest support (1) and the back-rest shell (6) for the back-rest shell (6) to be fixed in place on the back-rest support in positions of varying height,
    characterized in
    that at least one vertical row of locking projections (19) is disposed on the back-rest shell (6), forming between themselves locking recesses (20),
    that at least one locking slide (23, 24) is guided on the back-rest support (1) for displacement at right angles to the direction of height adjustment (H), and releasably engages with one of the locking recesses (20) for a position in height of the back-rest (5) to be fixed, and
    that a manually operated actuating slide (33) is guided on the back-rest support (1) for displacement parallel to the direction of height adjustment (H), the actuating slide (33) being coupled with the at least one locking slide (23, 24) by way of a tapered sliding transmission (41, 45).
  2. A chair according to claim 1, characterized in that the back-rest support (1), the back-rest shell (6), the at least one locking slide (23, 24) and the actuating slide (33) are injection-molded from plastic material and that all the guide elements (16, 17, 26, 36, 37) for the mutual sliding guidance of the afore-mentioned parts are formed in one piece with the latter.
  3. A chair according to claim 1 or 2, characterized in that the back-rest support (1) is substantially in the shape of a flat H in cross-section.
  4. A chair according to claim 3, characterized in that guide projections (16) are formed on the outsides (15) of the lateral legs (12, 13) of the H-shaped back-rest support (1), guide bars (17) extending in the direction of height adjustment (H) on the back-rest shell (6) enclasping the guide projections (16).
  5. A chair according to claim 3 and 4, characterized in that on the outside (32), turned to the rear, of the central leg (14) of the H-shaped back-rest support (1), the actuating slide (33) is displaceably guided on the back-rest support (1) by means of hooked guide noses (37), with which engage guide ribs (36) projecting inwards and extending in the direction of height adjustment (H) on the actuating slide (33).
  6. A chair according to one of claims 3 to 5, characterized in that on the inside (25), turned forwards towards the back-rest shell (6), of the central leg (14) of the H-shaped back-rest support (1), the at least one locking slide (23, 24) is guided for displacement in bar-type guide angles (26) on the back-rest support (1) at right angles to the direction of height adjustment (H).
  7. A chair according to claim 6, characterized in that the at least one locking slide (23, 24) has a flat cuboidal slide body (27) on which is formed a coupling pin (45) which passes through the central leg (14) of the H and is in contact with a key taper (41) on the actuating slide (33).
  8. A chair according to claim 7, characterized in that the at least one locking slide (23, 24) is acted upon in the direction of engagement (E) with the locking recesses (20) of the back-rest shell (6) by a helical compression spring (30) supporting itself on the lateral leg (12, 13) of the H.
  9. A chair according to claim 7 or 8, characterized in that the inside end of the key taper (41) is defined by a stop leg (42).
  10. A chair according to one of claims 1 to 9, characterized in that two rows of locking recesses (20) are provided side by side, with an associated locking slide (23, 24) engaging therewith from the outside, both locking slides being actuatable by a common actuating slide (33) via two key tapers (41) turned away from each other.
  11. A chair according to one of claims 1 to 10, characterized in that a snap-in pin (49) is integrally formed on the back-rest support (1), cooperating with two stops (21, 22) on the back-rest shell (6) for defining the range of adjustment in height of the back-rest (5).
EP96107628A 1995-05-17 1996-05-14 Chair, particularly office-chair, with height-adjustable backrest Expired - Lifetime EP0743035B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29508082U 1995-05-17
DE29508082U DE29508082U1 (en) 1995-05-17 1995-05-17 Chair, in particular office chair, with a height-adjustable backrest construction

Publications (2)

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EP0743035A1 EP0743035A1 (en) 1996-11-20
EP0743035B1 true EP0743035B1 (en) 1999-04-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP96107628A Expired - Lifetime EP0743035B1 (en) 1995-05-17 1996-05-14 Chair, particularly office-chair, with height-adjustable backrest

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US (1) US5678893A (en)
EP (1) EP0743035B1 (en)
DE (2) DE29508082U1 (en)

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DE19717077B4 (en) * 1997-04-23 2004-11-18 Bock-1 Gmbh & Co. Height-adjustable armrest, especially for an office chair
GB9802447D0 (en) 1998-02-04 1998-04-01 Unit Press Limited Mechanism for chair
DE19812805A1 (en) * 1998-03-16 1999-09-30 Drabert Gmbh Back of office chair which can be adjusted in height from seated position
GB9811209D0 (en) 1998-05-22 1998-07-22 Unit Press Limited Height adjustment for back part of chair
GB9928509D0 (en) 1999-12-03 2000-02-02 Unit Press Limited Improvements to chairs
DE20004361U1 (en) * 2000-03-10 2001-04-12 Froli Kunststoffwerk Fromme H Seat for a standing aid or for an office or workshop chair
US6533352B1 (en) 2000-07-07 2003-03-18 Virco Mgmt. Corporation Chair with reclining back rest
US7604298B2 (en) 2007-06-01 2009-10-20 Steelcase Development Corporation Chair back attachment and method of assembly
AP2996A (en) * 2008-04-02 2014-10-31 Sicpa Holding Sa Identification and authentication using liquid crystal material markings
US7690729B2 (en) * 2008-08-14 2010-04-06 Liao Tzu-Ying Adjustable chair headrest frame
DE102009014777B4 (en) * 2009-03-25 2017-03-30 Wilkhahn Wilkening + Hahne Gmbh + Co. Kg adjustment
US11096496B2 (en) 2019-04-11 2021-08-24 Hugh Charles Murray Therapeutic chair with adjustable back and method of using the same
CN113001138B (en) * 2021-03-03 2022-02-11 杭州秋韵工贸有限公司 Installation frock of back of chair seat glide machanism

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Also Published As

Publication number Publication date
EP0743035A1 (en) 1996-11-20
DE59601641D1 (en) 1999-05-20
US5678893A (en) 1997-10-21
DE29508082U1 (en) 1995-09-14

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