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EP3345508B1 - Seat with one-piece seat shell - Google Patents

Seat with one-piece seat shell Download PDF

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Publication number
EP3345508B1
EP3345508B1 EP18150177.6A EP18150177A EP3345508B1 EP 3345508 B1 EP3345508 B1 EP 3345508B1 EP 18150177 A EP18150177 A EP 18150177A EP 3345508 B1 EP3345508 B1 EP 3345508B1
Authority
EP
European Patent Office
Prior art keywords
seat
chair
backrest
support
intermediate element
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.)
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Application number
EP18150177.6A
Other languages
German (de)
French (fr)
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EP3345508A1 (en
Inventor
Martin Ballendat
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.)
DESIGN BALLENDAT GmbH
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Design Ballendat GmbH
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Publication date
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Publication of EP3345508A1 publication Critical patent/EP3345508A1/en
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Publication of EP3345508B1 publication Critical patent/EP3345508B1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/034—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest
    • A47C1/035—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts including a leg-rest or foot-rest in combination with movably coupled seat and back-rest, i.e. the seat and back-rest being movably coupled in such a way that the extension mechanism of the foot-rest is actuated at least by the relative movements of seat and backrest
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/12—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats with shell-shape seat and back-rest unit, e.g. having arm rests

Definitions

  • the invention relates to a chair with a one-piece seat shell.
  • a chair which has a frame and a seat shell with a seat element and a backrest.
  • the invention is therefore based on the object of creating a chair which is distinguished by a simple construction and at the same time has a stable seating area and a stable backrest area.
  • the chair according to the invention comprises a support frame and a one-piece seat shell arranged on the support frame, which comprises a seat element and a backrest element.
  • a flexible intermediate element is arranged between the seat element and the backrest element.
  • the seat element is mechanically uncoupled from the support frame in relation to the support frame in the longitudinal direction of the chair due to the flexible intermediate element.
  • the backrest element is mechanically uncoupled in the vertical direction of the chair due to the flexible intermediate element relative to the seat element relative to the support frame.
  • the seat element and the backrest element are also due to the flexible intermediate element about at least one axis extending at least partially in the longitudinal direction of the chair pivotable to each other.
  • the seat shell is designed as a one-piece plastic injection molded part.
  • Position adjustment is to be understood as the adjustment of the position of a chair element to adapt to a user.
  • a chair element can thus be adjusted from a first position to a second position and locked there.
  • both the seat element and the backrest element are largely rigid in themselves and a flexible intermediate element is arranged between these two elements, a relatively stable seating area and a relatively stable backrest area are realized with a simple construction at the same time.
  • the flexible intermediate element enables the seat element to be positionally adjustable in the longitudinal direction of the chair without this position setting having an influence on the position of the backrest element.
  • the flexible intermediate element follows the adjustment of the position to the same extent in its transition region to the seat element.
  • the position of the flexible intermediate element on the backrest element side remains unchanged and thus the position of the backrest element also remains unchanged.
  • the flexible intermediate element makes it possible for the backrest element to be positionally adjustable in the vertical direction of the chair without this position setting having an influence on the position of the seat element.
  • the flexible intermediate element follows the adjustment of the position to the same extent in its transition region to the backrest element.
  • the position of the flexible intermediate element remains unchanged on the seat element side and thus the position of the seat element also remains unchanged.
  • the seat element and the backrest element can be pivoted relative to one another about at least one axis that extends at least partially in the longitudinal direction of the chair.
  • the seat element can be pivoted in the transverse direction of the chair by a first angle
  • the backrest element can be pivoted by a second angle, the two angles being unequal.
  • a movement of one of the two elements leads to a torsion of the one-piece seat shell due to the flexible intermediate element.
  • pivoting the backrest element to one side with respect to a vertical central longitudinal plane of the chair can lead to pivoting of the seat element in the opposite direction with respect to the vertical central longitudinal plane of the chair.
  • the seat shell as a one-piece plastic injection molded part, the chair can be manufactured in a simple manner and a permanently dimensionally stable seat shell can be ensured.
  • the one-piece plastic injection-molded part is a multi-component injection-molded part, in particular a two-component injection-molded part.
  • the seat element and the backrest element are formed from a first plastic component and the intermediate element from a second plastic component.
  • the intermediate element has a convex profile which extends in a cross section along a vertical longitudinal center plane of the chair and projects in the direction of the back of the chair.
  • the convex shape means that the length of the intermediate element is significantly lengthened compared to a direct connection between the seat element and the backrest element.
  • An intermediate element is thus formed, which holds material ready to compensate for position settings of the seat element and the backrest element.
  • the larger the bulged course of the intermediate element, the larger can also be the position adjustment paths of the seat element and the backrest element.
  • the carrier frame comprises a carrying unit which carries the seat shell and preferably comprises a synchronous mechanism.
  • a support unit can further improve the movement behavior of the chair on movements of the user.
  • the support unit comprises a swivel unit for the seat element and a swivel arm for the backrest element.
  • the swivel unit serves to tilt the seat element in the transverse direction of the chair and lies directly against the seat element.
  • the seat element is displaceable relative to the swivel unit.
  • the swivel arm supports the backrest element and serves to pivot the backrest element about a swivel axis in the transverse direction of the chair.
  • the backrest element can be moved relative to the swivel arm.
  • the intermediate element serves as a restoring element for the backrest element, that is to say by means of the intermediate element it is ensured that the backrest element is held in its unloaded state or in the absence of a laterally acting tilting force in a central position in which one The vertical axis of the backrest element viewed in the longitudinal direction of the chair has a vertical orientation. If necessary, an additional return spring can be dispensed with, which acts on a column of the backrest element.
  • a chair 2 which comprises a support frame 10 and a one-piece seat shell 20 arranged on the support frame 10.
  • the support frame 10 has five support arms 11, which are each provided with a bottom-side roller 13.
  • the support frame can also be a support frame with four chair legs.
  • the support frame 10 comprises a support unit 14 which supports the seat shell 20.
  • the support unit 14 in turn comprises a synchronous mechanism, a swivel unit 12 and a swivel arm 16.
  • the one-piece seat shell 20 comprises a seat element 22 and a backrest element 26.
  • the seat shell 20 comprises a flexible intermediate element 24, which is arranged between the seat element 22 and the backrest element 26 and is inseparably connected to both elements 22, 26.
  • the swivel unit 12 of the support unit 14 carries the seat element 22 and serves to tilt the seat element 22 in the transverse direction of the chair.
  • the pivot arm 16 of the support unit 14 engages the backrest element 26 and serves to pivot the backrest element 26 about a pivot axis 17 in the transverse direction of the chair.
  • the pivot unit 12 of the support unit 14 also serves to pivot the seat element 22 and the backrest element 26 in the longitudinal direction of the chair.
  • the swivel unit 12 is designed such that the seat element 22 can be swiveled about at least one seat element swivel axis 19a and the backrest element 26 can swivel about a backrest element swivel axis 19b.
  • the seat shell 20 is designed as a two-component injection-molded part, the seat element 22 and the backrest element 26 being formed from a rigid first component and the flexible intermediate element 24 being formed from a second flexible component.
  • the intermediate element 24 has a convex shape that extends in a cross section along a vertical longitudinal center plane of the chair and projects in the direction of the back of the chair, as in particular Figure 2 shows.
  • the width of the connection area of the intermediate element 24 on the seat element side corresponds to the width of the connection area of the seat element 22.
  • the width of the connection area of the intermediate element 24 corresponds to the width of the connection area of the backrest element 26 on the backrest element side.
  • the backrest element 26 has a holding web 28 on its rear side, on which the swivel arm 16 engages.
  • a slide bearing is formed between the holding web 28 and the swivel arm 16.
  • the seat element 22 can be adjusted mechanically uncoupled in the longitudinal direction L of the chair due to the flexible intermediate element 24 relative to the backrest element 26 relative to the support frame 10.
  • the backrest element 26 can be adjusted mechanically uncoupled in relation to the support frame 10 in the vertical direction H due to the flexible intermediate element 24 relative to the seat element 22. Because of its flexibility, the intermediate element 24 is used to allow the position of the seat element 22 and / or the backrest element 26 to be adjusted without influencing the position of the respective other element 22, 26.
  • the seat element 22 and the backrest element 26 are pivotable relative to one another due to the flexible intermediate element 24 about at least one axis extending at least partially in the longitudinal direction of the chair.
  • the Figures 3 and 4th namely show by way of example that the backrest element 26 is tilted by a larger angle in the transverse direction of the chair than the seat element 22. The backrest element 26 is consequently pivoted with respect to the seat element 22.
  • a user can thus initiate a movement into the seat shell 20, to which the seat shell 20 reacts with a corresponding movement of the seat element 22 and the backrest element 26. It is also possible for the seat pan 20 to be twisted in such a way that the seat element 22 can be moved counter to the direction of movement of the backrest element 26.

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

Description

Die Erfindung betrifft einen Stuhl mit einer einteiligen Sitzschale.The invention relates to a chair with a one-piece seat shell.

Es sind Stühle mit einer einteiligen Sitzschale bekannt, welche einen Sitzbereich und einen Rückenlehnenbereich umfassen. Derartige Stühle weisen jedoch entweder keinen ausreichend stabilen Sitzbereich und Rückenlehnenbereich und/oder keine einfache Konstruktion auf.Chairs with a one-piece seat shell are known, which comprise a seating area and a backrest area. However, such chairs either do not have a sufficiently stable seating area and backrest area and / or are not of simple construction.

Aus Druckschrift DE 10 2014 103780 B3 ist ein Stuhl bekannt, der ein Gestell und einer Sitzschale mit einem Sitzelement und einer Rückenlehne bekannt.From publication DE 10 2014 103780 B3 a chair is known which has a frame and a seat shell with a seat element and a backrest.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Stuhl zu schaffen, der sich durch eine einfache Konstruktion auszeichnet und gleichzeitig einen stabilen Sitzbereich und einen stabilen Rückenlehnenbereich aufweist.The invention is therefore based on the object of creating a chair which is distinguished by a simple construction and at the same time has a stable seating area and a stable backrest area.

Diese Aufgabe ist erfindungsgemäß durch den Stuhl mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by the chair with the features of claim 1.

Der Stuhl nach der Erfindung umfasst ein Trägergestell und eine auf dem Trägergestell angeordnete einteilige Sitzschale, welche ein Sitzelement und ein Rückenlehnenelement umfasst. Zwischen dem Sitzelement und dem Rückenlehnenelement ist ein flexibles Zwischenelement angeordnet. Das Sitzelement ist in Stuhllängsrichtung aufgrund des flexiblen Zwischenelements mechanisch ungekoppelt zu dem Rückenlehnenelement gegenüber dem Trägergestell positionseinstellbar. Das Rückenlehnenelement ist in Stuhlhochrichtung aufgrund des flexiblen Zwischenelements mechanisch ungekoppelt zu dem Sitzelement gegenüber dem Trägergestell positionseinstellbar. Das Sitzelement und das Rückenlehnenelement sind zudem aufgrund des flexiblen Zwischenelements um mindestens eine sich zumindest teilweise in Stuhllängsrichtung erstreckende Achse zueinander verschwenkbar. Die Sitzschale ist als einteiliges Kunststoff-Spritzgußteil ausgeführt.The chair according to the invention comprises a support frame and a one-piece seat shell arranged on the support frame, which comprises a seat element and a backrest element. A flexible intermediate element is arranged between the seat element and the backrest element. The seat element is mechanically uncoupled from the support frame in relation to the support frame in the longitudinal direction of the chair due to the flexible intermediate element. The backrest element is mechanically uncoupled in the vertical direction of the chair due to the flexible intermediate element relative to the seat element relative to the support frame. The seat element and the backrest element are also due to the flexible intermediate element about at least one axis extending at least partially in the longitudinal direction of the chair pivotable to each other. The seat shell is designed as a one-piece plastic injection molded part.

Unter Positionseinstellung ist die Verstellung der Position eines Stuhlelements zur Anpassung an einen Nutzer zu verstehen. Ein Stuhlelement ist somit von einer ersten Position in eine zweite Position verstellbar und dort arretierbar. Von der Positionseinstellung ist die Sitzschalenbewegung zu unterscheiden, welche die Bewegungsreaktion des Sitzelements auf Bewegungen des Nutzers beschreibt. Lehnt sich ein Nutzer beispielsweise in Stuhlquerrichtung, kann die Sitzschale zumindest abschnittsweise der Nutzerbewegung folgen. Nach Rücknahme bewegungsverursachenden Kraft kehrt die Sitzschale wieder in ihre Ausgangslage zurück.Position adjustment is to be understood as the adjustment of the position of a chair element to adapt to a user. A chair element can thus be adjusted from a first position to a second position and locked there. A distinction must be made between the position adjustment and the seat pan movement, which describes the reaction of the seat element to the movements of the user. If a user leans, for example, in the transverse direction of the chair, the seat shell can follow the user movement at least in sections. After the force causing the movement has been withdrawn, the seat shell returns to its original position.

Dadurch, dass sowohl das Sitzelement wie auch das Rückenlehnenelement in sich weitestgehend starr ausgebildet sind und zwischen diesen beiden Elementen ein flexibles Zwischenelement angeordnet ist, werden ein relativ stabiler Sitzbereich und ein relativ stabiler Rückenlehnenbereich bei gleichzeitig einfacher Konstruktion realisiert.Because both the seat element and the backrest element are largely rigid in themselves and a flexible intermediate element is arranged between these two elements, a relatively stable seating area and a relatively stable backrest area are realized with a simple construction at the same time.

Das flexible Zwischenelement ermöglicht, dass das Sitzelement in Stuhllängsrichtung positionseinstellbar ist, ohne dass diese Positionseinstellung einen Einfluss auf die Position des Rückenlehnenelements hat. Das flexible Zwischenelement folgt nämlich in seinem Übergangsbereich zu dem Sitzelement der Verstellung der Position in gleichem Maße nach. Zugleich bleibt die Position des flexiblen Zwischenelements rückenlehnenelementseitig unverändert und somit bleibt auch die Position des Rückenlehnenelements unverändert.The flexible intermediate element enables the seat element to be positionally adjustable in the longitudinal direction of the chair without this position setting having an influence on the position of the backrest element. The flexible intermediate element follows the adjustment of the position to the same extent in its transition region to the seat element. At the same time, the position of the flexible intermediate element on the backrest element side remains unchanged and thus the position of the backrest element also remains unchanged.

Gleichsam ermöglicht das flexible Zwischenelement, dass das Rückenlehnenelement in Stuhlhochrichtung positionseinstellbar ist, ohne dass diese Positionseinstellung einen Einfluss auf die Position des Sitzelements hat. Das flexible Zwischenelement folgt nämlich in seinem Übergangsbereich zu dem Rückenlehnenelement der Verstellung der Position in gleichem Maße nach. Zugleich bleibt die Position des flexiblen Zwischenelements sitzelementseitig unverändert und somit bleibt auch die Position des Sitzelements unverändert.At the same time, the flexible intermediate element makes it possible for the backrest element to be positionally adjustable in the vertical direction of the chair without this position setting having an influence on the position of the seat element. The flexible intermediate element follows the adjustment of the position to the same extent in its transition region to the backrest element. At the same time, the position of the flexible intermediate element remains unchanged on the seat element side and thus the position of the seat element also remains unchanged.

Zudem sind das Sitzelement und das Rückenlehnenelement aufgrund des flexiblen Zwischenelements um mindestens eine sich zumindest teilweise in Stuhllängsrichtung erstreckende Achse zueinander verschwenkbar. So kann beispielsweise ein Verschwenken des Sitzelements in Stuhlquerrichtung um einen ersten Winkel zu einem Verschwenken des Rückenlehnenelements um einen zweiten Winkel erfolgen, wobei die beiden Winkel ungleich groß sein können. Es ist zudem möglich, dass eine Bewegung eines der beiden Elemente zu einer Torsion der einteiligen Sitzschale führt und zwar aufgrund des flexiblen Zwischenelements. So kann beispielsweise ein Verschwenken des Rückenlehnenelements zu einer Seite bezüglich einer vertikalen Stuhllängsmittelebene zu einem Verschwenken des Sitzelements in die entgegengesetzte Richtung bezüglich der vertikalen Stuhllängsmittelebene führen.In addition, due to the flexible intermediate element, the seat element and the backrest element can be pivoted relative to one another about at least one axis that extends at least partially in the longitudinal direction of the chair. For example, the seat element can be pivoted in the transverse direction of the chair by a first angle, and the backrest element can be pivoted by a second angle, the two angles being unequal. It is also possible that a movement of one of the two elements leads to a torsion of the one-piece seat shell due to the flexible intermediate element. For example, pivoting the backrest element to one side with respect to a vertical central longitudinal plane of the chair can lead to pivoting of the seat element in the opposite direction with respect to the vertical central longitudinal plane of the chair.

Aufgrund des Zwischenelements ist zudem keine aufwändige Konstruktion nötig, um einen derartigen Stuhl zu gewährleisten.Due to the intermediate element, no complex construction is required to ensure such a chair.

Durch die Ausgestaltung der Sitzschale als einteiliges Kunststoff-Spritzgußteil kann der Stuhl in einfacher Weise herstellbar sein und eine dauerhaft formstabile Sitzschale gewährleistet werden.By designing the seat shell as a one-piece plastic injection molded part, the chair can be manufactured in a simple manner and a permanently dimensionally stable seat shell can be ensured.

Bei einer weiteren bevorzugten Ausführungsform des Stuhls nach der Erfindung ist das einteilige Kunststoff-Spritzgußteil ein Mehrkomponenten-Spritzgußteil, insbesondere ein Zweikomponenten-Spritzgußteil. Bei einer derartigen Ausführungsform sind das Sitzelement und das Rückenlehnenelement aus einer ersten Kunststoff-Komponente und das Zwischenelement aus einer zweiten Kunststoff-Komponente gebildet.In a further preferred embodiment of the chair according to the invention, the one-piece plastic injection-molded part is a multi-component injection-molded part, in particular a two-component injection-molded part. In such an embodiment, the seat element and the backrest element are formed from a first plastic component and the intermediate element from a second plastic component.

Bei einer weiteren bevorzugten Ausführungsform des Stuhls nach der Erfindung weist das Zwischenelement einen in einem Querschnitt entlang einer vertikalen Stuhllängsmittelebene verlaufenden in Richtung Stuhlrückseite ragenden konvexen Verlauf auf. Der konvexe Verlauf führt dazu, dass die Länge des Zwischenelements gegenüber einer direkten Verbindung zwischen dem Sitzelement und dem Rückenlehnenelement wesentlich verlängert ist. Somit ist ein Zwischenelement ausgebildet, welches Material zum Ausgleich von Positionseinstellungen des Sitzelements und des Rückenlehnenelements bereithält. Je größer der bauchige Verlauf des Zwischenelements ist, desto größer können auch die Positionseinstellungswege des Sitzelements und des Rückenlehnenelements sein.In a further preferred embodiment of the chair according to the invention, the intermediate element has a convex profile which extends in a cross section along a vertical longitudinal center plane of the chair and projects in the direction of the back of the chair. The convex shape means that the length of the intermediate element is significantly lengthened compared to a direct connection between the seat element and the backrest element. An intermediate element is thus formed, which holds material ready to compensate for position settings of the seat element and the backrest element. The larger the bulged course of the intermediate element, the larger can also be the position adjustment paths of the seat element and the backrest element.

Bei einer weiteren bevorzugten Ausführungsform des Stuhls nach der Erfindung umfasst das Trägergestell eine Trageinheit, welche die Sitzschale trägt und umfasst vorzugsweise eine Synchronmechanik. Durch eine derartige Trageinheit kann eine weitere Verbesserung des Bewegungsverhaltens des Stuhls auf Bewegungen des Nutzers erfolgen.In a further preferred embodiment of the chair according to the invention, the carrier frame comprises a carrying unit which carries the seat shell and preferably comprises a synchronous mechanism. Such a support unit can further improve the movement behavior of the chair on movements of the user.

Bei einer weiteren bevorzugten Ausführungsform des Stuhls nach der Erfindung umfasst die Trageinheit eine Schwenkeinheit für das Sitzelement und einen Schwenkarm für das Rückenlehnenelement. Die Schwenkeinheit dient dem Verkippen des Sitzelements in Stuhlquerrichtung und liegt direkt an dem Sitzelement an. Zur Positionseinstellung des Sitzelements ist das Sitzelement gegenüber der Schwenkeinheit verschiebbar. Der Schwenkarm stützt das Rückenlehnenelement und dient dem Verschwenken des Rückenlehnenelements um eine Schwenkachse in Stuhlquerrichtung. Zur Positionseinstellung des Rückenlehnenelements ist das Rückenlehnenelement gegenüber dem Schwenkarm verschiebbar.In a further preferred embodiment of the chair according to the invention, the support unit comprises a swivel unit for the seat element and a swivel arm for the backrest element. The swivel unit serves to tilt the seat element in the transverse direction of the chair and lies directly against the seat element. To adjust the position of the seat element, the seat element is displaceable relative to the swivel unit. The swivel arm supports the backrest element and serves to pivot the backrest element about a swivel axis in the transverse direction of the chair. To adjust the position of the backrest element, the backrest element can be moved relative to the swivel arm.

Bei einer speziellen Ausführungsform des Stuhls nach der Erfindung dient das Zwischenelement als Rückstellelement für das Rückenlehnenelement, das heißt mittels des Zwischenelements wird gewährleistet, dass das Rückenlehnenelement in seinem unbelasteten Zustand bzw. beim Fehlen einer seitlich wirkenden Kippkraft in einer Mittellage gehalten wird, in der eine Hochachse des Rückenlehnenelements in Stuhllängsrichtung betrachtet eine vertikale Ausrichtung hat. Gegebenenfalls kann auf eine zusätzliche Rückstellfeder verzichtet werden, die an einer Säule des Rückenlehnenelements angreift.In a special embodiment of the chair according to the invention, the intermediate element serves as a restoring element for the backrest element, that is to say by means of the intermediate element it is ensured that the backrest element is held in its unloaded state or in the absence of a laterally acting tilting force in a central position in which one The vertical axis of the backrest element viewed in the longitudinal direction of the chair has a vertical orientation. If necessary, an additional return spring can be dispensed with, which acts on a column of the backrest element.

Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstandes der Erfindung sind der Beschreibung, der Zeichnung und den Schutzansprüchen entnehmbar.Further advantages and advantageous refinements of the subject matter of the invention can be found in the description, the drawing and the protection claims.

Ein Ausführungsbeispiel eines Stuhls nach der Erfindung ist in der Zeichnung schematisch vereinfacht dargestellt und wird in der nachfolgenden Beschreibung näher erläutert. Es zeigt:

Figur 1
eine perspektivische Ansicht eines Stuhls nach der Erfindung;
Figur 2
eine Seitenansicht des Stuhls nach Figur 1;
Figur 3
eine Frontansicht des Stuhls nach Figur 1 in einer Kippstellung; und
Figur 4
eine Rückansicht des Stuhls nach Figur 1 in einer Kippstellung nach Figur 3.
An embodiment of a chair according to the invention is shown schematically simplified in the drawing and is explained in more detail in the following description. It shows:
Figure 1
a perspective view of a chair according to the invention;
Figure 2
a side view of the chair after Figure 1 ;
Figure 3
a front view of the chair after Figure 1 in a tilt position; and
Figure 4
a rear view of the chair after Figure 1 in a tilted position Figure 3 .

In der Zeichnung ist ein Stuhl 2 dargestellt, der ein Trägergestell 10 und eine auf dem Trägergestell 10 angeordnete einteilige Sitzschale 20 umfasst. Das Trägergestell 10 weist in der dargestellten Ausführungsform fünf Trägerarme 11 auf, welche jeweils mit einer bodenseitigen Rolle 13 versehen sind. Das Trägergestell kann jedoch auch ein Trägergestell mit vier Stuhlbeinen sein.In the drawing, a chair 2 is shown, which comprises a support frame 10 and a one-piece seat shell 20 arranged on the support frame 10. In the embodiment shown, the support frame 10 has five support arms 11, which are each provided with a bottom-side roller 13. However, the support frame can also be a support frame with four chair legs.

Das Trägergestell 10 umfasst eine Trageinheit 14, welche die Sitzschale 20 trägt. Die Trageinheit 14 wiederum umfasst eine Synchronmechanik, eine Schwenkeinheit 12 und einen Schwenkarm 16.The support frame 10 comprises a support unit 14 which supports the seat shell 20. The support unit 14 in turn comprises a synchronous mechanism, a swivel unit 12 and a swivel arm 16.

Die einteilige Sitzschale 20 umfasst ein Sitzelement 22 und ein Rückenlehnenelement 26. Zudem umfasst die Sitzschale 20 ein flexibles Zwischenelement 24, welches zwischen dem Sitzelement 22 und dem Rückenlehnenelement 26 angeordnet und mit beiden Elementen 22, 26 untrennbar verbunden ist.The one-piece seat shell 20 comprises a seat element 22 and a backrest element 26. In addition, the seat shell 20 comprises a flexible intermediate element 24, which is arranged between the seat element 22 and the backrest element 26 and is inseparably connected to both elements 22, 26.

Die Schwenkeinheit 12 der Trageinheit 14 trägt das Sitzelement 22 und dient dem Kippen des Sitzelements 22 in Stuhlquerrichtung. Der Schwenkarm 16 der Trageinheit 14 greift an dem Rückenlehnenelement 26 an und dient dem Verschwenken des Rückenlehnenelements 26 um eine Schwenkachse 17 in Stuhlquerrichtung. Die Schwenkeinheit 12 der Trageinheit 14 dient zudem einem Verschwenken des Sitzelements 22 und des Rückenlehnenelements 26 in Stuhllängsrichtung. Bei dem gezeigten Ausführungsbeispiel ist die Schwenkeinheit 12 derart ausgeführt, dass das Sitzelement 22 um zumindest eine Sitzelementschwenkachse 19a verschwenkbar ist und das Rückenlehnenelement 26 um eine Rückenlehnenelementschwenkachse 19b verschwenkbar ist. Dadurch kann bei Verschwenkung des Sitzelements 22 und des Rückenlehnenelements 26 in gleiche Bewegungsrichtungen ein ungleiches Verschwenkungsmaß unterstützt und/oder realisiert werden, wobei keine mechanische Kopplung zwischen dem Rückenlehnenelement 26 und dem Sitzelement 22 vorliegt.The swivel unit 12 of the support unit 14 carries the seat element 22 and serves to tilt the seat element 22 in the transverse direction of the chair. The pivot arm 16 of the support unit 14 engages the backrest element 26 and serves to pivot the backrest element 26 about a pivot axis 17 in the transverse direction of the chair. The pivot unit 12 of the support unit 14 also serves to pivot the seat element 22 and the backrest element 26 in the longitudinal direction of the chair. In the exemplary embodiment shown, the swivel unit 12 is designed such that the seat element 22 can be swiveled about at least one seat element swivel axis 19a and the backrest element 26 can swivel about a backrest element swivel axis 19b. As a result, when the seat element 22 and the backrest element 26 are pivoted in the same directions of movement, an uneven degree of pivoting can occur are supported and / or implemented, there being no mechanical coupling between the backrest element 26 and the seat element 22.

Die Sitzschale 20 ist als Zweikomponenten-Spritzgußteil ausgebildet, wobei das Sitzelement 22 und das Rückenlehnenelement 26 aus einer starren ersten Komponente gebildet sind und das flexible Zwischenelement 24 aus einer zweiten flexiblen Komponente gebildet ist.The seat shell 20 is designed as a two-component injection-molded part, the seat element 22 and the backrest element 26 being formed from a rigid first component and the flexible intermediate element 24 being formed from a second flexible component.

Das Zwischenelement 24 weist einen in einem Querschnitt entlang einer vertikalen Stuhllängsmittelebene verlaufenden in Richtung Stuhlrückseite ragenden konvexen Verlauf auf, wie insbesondere Figur 2 zeigt. Die Breite des Anschlussbereiches des Zwischenelements 24 sitzelementseitig entspricht der Breite des Anschlussbereichs des Sitzelements 22. Zudem entspricht die Breite des Anschlussbereiches des Zwischenelements 24 rückenlehnenelementseitig der Breite des Anschlussbereichs des Rückenlehnenelements 26.The intermediate element 24 has a convex shape that extends in a cross section along a vertical longitudinal center plane of the chair and projects in the direction of the back of the chair, as in particular Figure 2 shows. The width of the connection area of the intermediate element 24 on the seat element side corresponds to the width of the connection area of the seat element 22. In addition, the width of the connection area of the intermediate element 24 corresponds to the width of the connection area of the backrest element 26 on the backrest element side.

Das Rückenlehnenelement 26 weist an seiner Rückseite einen Haltesteg 28 auf, an welchem der Schwenkarm 16 angreift. Zwischen dem Haltesteg 28 und dem Schwenkarm 16 ist ein Gleitlager ausgebildet.The backrest element 26 has a holding web 28 on its rear side, on which the swivel arm 16 engages. A slide bearing is formed between the holding web 28 and the swivel arm 16.

Ein weiteres Gleitlager ist zudem gebildet zwischen dem Sitzelement 22 und der Schwenkeinheit 12 der Trageinheit 14. Das Sitzelement 22 ist in Stuhllängsrichtung L aufgrund des flexiblen Zwischenelements 24 mechanisch ungekoppelt zu dem Rückenlehnenelement 26 gegenüber dem Trägergestell 10 positionseinstellbar. Zudem ist das Rückenlehnenelement 26 in Stuhlhochrichtung H aufgrund des flexiblen Zwischenelements 24 mechanisch ungekoppelt zu dem Sitzelement 22 gegenüber dem Trägergestell 10 positionseinstellbar. Das Zwischenelement 24 dient nämlich aufgrund seiner Flexibilität dazu, eine Positionseinstellung des Sitzelements 22 und/oder des Rückenlehnenelements 26 zuzulassen, ohne die Position des jeweils anderen Elements 22, 26 zu beeinflussen.Another slide bearing is also formed between the seat element 22 and the swivel unit 12 of the support unit 14. The seat element 22 can be adjusted mechanically uncoupled in the longitudinal direction L of the chair due to the flexible intermediate element 24 relative to the backrest element 26 relative to the support frame 10. In addition, the backrest element 26 can be adjusted mechanically uncoupled in relation to the support frame 10 in the vertical direction H due to the flexible intermediate element 24 relative to the seat element 22. Because of its flexibility, the intermediate element 24 is used to allow the position of the seat element 22 and / or the backrest element 26 to be adjusted without influencing the position of the respective other element 22, 26.

Wie die Figuren 3 und 4 zeigen, sind das Sitzelement 22 und das Rückenlehnenelement 26 aufgrund des flexiblen Zwischenelements 24 um mindestens eine sich zumindest teilweise in Stuhllängsrichtung erstreckende Achse zueinander verschwenkbar. Die Figuren 3 und 4 zeigen nämlich beispielhaft, dass das Rückenlehnenelement 26 um einen größeren Winkel in Stuhlquerrichtung verkippt ist als das Sitzelement 22. Das Rückenlehnenelement 26 ist folglich bezüglich des Sitzelements 22 verschwenkt.As the Figures 3 and 4th show, the seat element 22 and the backrest element 26 are pivotable relative to one another due to the flexible intermediate element 24 about at least one axis extending at least partially in the longitudinal direction of the chair. The Figures 3 and 4th namely show by way of example that the backrest element 26 is tilted by a larger angle in the transverse direction of the chair than the seat element 22. The backrest element 26 is consequently pivoted with respect to the seat element 22.

Somit kann ein Nutzer eine Bewegung in die Sitzschale 20 einleiten, auf welche die Sitzschale 20 mit entsprechender Bewegung des Sitzelements 22 und des Rückenlehnenelements 26 reagiert. Es ist zudem möglich, dass sich die Sitzschale 20 derart tordieren lässt, dass das Sitzelement 22 entgegen der Bewegungsrichtung des Rückenlehnenelements 26 bewegbar ist.A user can thus initiate a movement into the seat shell 20, to which the seat shell 20 reacts with a corresponding movement of the seat element 22 and the backrest element 26. It is also possible for the seat pan 20 to be twisted in such a way that the seat element 22 can be moved counter to the direction of movement of the backrest element 26.

Claims (6)

  1. A chair, comprising
    a support (10) and
    a one-piece seat shell (20) disposed on the support (10), the seat shell (20) comprising a seat element (22) and a backrest element (26) between which a flexible intermediate element (24) is disposed,
    the flexible intermediate element (24) allowing the seat element (22) and the backrest element (26) to pivot relative to each other about at least one axis extending at least partially in the longitudinal direction of the chair, characterized in that the flexible intermediate element (24) allows the position of the seat element (22) to be adjusted in the longitudinal direction of the chair relative to the support (10) in a manner mechanically separate from the backrest element (26),
    the flexible intermediate element (24) allows the position of the backrest element (26) to be adjusted in the vertical direction of the chair relative to the support (10) in a manner mechanically separate from the seat element (22), and
    the seat shell (20) is realized as a one-piece injection-molded plastic part.
  2. The chair according to claim 1, wherein
    the one-piece injection-molded plastic part is a multi-component injection-molded part, in particular a two-component injection-molded part.
  3. The chair according to any one of claims 1 to 2, wherein
    the intermediate element (24) has a convex shape extending along a vertical longitudinal center plane of the chair in a cross section and protruding in the direction of the back of the chair.
  4. The chair according to any one of claims 1 to 3, wherein
    the support (10) comprises a supporting unit (14) supporting the seat shell (20) and preferably comprising a synchro mechanism.
  5. The chair according to claim 4, wherein
    the supporting unit (14) comprises a pivoting unit (12) for the seat element (22) and a pivoting arm (16) for the backrest element (26).
  6. The chair according to any one of claims 1 to 5, characterized in that the intermediate element serves as a resetting element for the backrest element in such a manner that the backrest element is in a middle position when in the unloaded state.
EP18150177.6A 2017-01-04 2018-01-03 Seat with one-piece seat shell Active EP3345508B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017100117 2017-01-04
DE202017102909.3U DE202017102909U1 (en) 2017-01-04 2017-05-15 Chair with one-piece seat shell

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EP3345508A1 EP3345508A1 (en) 2018-07-11
EP3345508B1 true EP3345508B1 (en) 2020-06-17

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EP18150177.6A Active EP3345508B1 (en) 2017-01-04 2018-01-03 Seat with one-piece seat shell
EP18000037.4A Active EP3345507B1 (en) 2017-01-04 2018-01-04 Mechanism for a chair

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EP18000037.4A Active EP3345507B1 (en) 2017-01-04 2018-01-04 Mechanism for a chair

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US (1) US10499742B2 (en)
EP (2) EP3345508B1 (en)
DE (1) DE202017102909U1 (en)

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US10702066B2 (en) * 2018-11-19 2020-07-07 Profim SP. ZO.O Office chair
DE102020124975A1 (en) * 2020-09-24 2022-03-24 Bock 1 Gmbh & Co. Kg Mechanism for a chair

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US6523898B1 (en) * 1999-06-17 2003-02-25 Steelcase Development Corporation Chair construction
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ITMI20022194A1 (en) * 2002-10-16 2004-04-17 Icf Spa CHAIR WITH SEAT AND FURNITURE BACK.
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Also Published As

Publication number Publication date
EP3345508A1 (en) 2018-07-11
DE202017102909U1 (en) 2018-04-05
US10499742B2 (en) 2019-12-10
US20180184809A1 (en) 2018-07-05
EP3345507A1 (en) 2018-07-11
EP3345507B1 (en) 2020-04-29

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