EP2040582A1 - Back rest for a stool or a chair, and stool or chair provided with such a back rest - Google Patents

Back rest for a stool or a chair, and stool or chair provided with such a back rest

Info

Publication number
EP2040582A1
EP2040582A1 EP07722472A EP07722472A EP2040582A1 EP 2040582 A1 EP2040582 A1 EP 2040582A1 EP 07722472 A EP07722472 A EP 07722472A EP 07722472 A EP07722472 A EP 07722472A EP 2040582 A1 EP2040582 A1 EP 2040582A1
Authority
EP
European Patent Office
Prior art keywords
support
backrest according
backrest
carrier
supports
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07722472A
Other languages
German (de)
French (fr)
Other versions
EP2040582B1 (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.)
Rohde and Grahl GmbH
Original Assignee
Rohde and Grahl GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rohde and Grahl GmbH filed Critical Rohde and Grahl GmbH
Publication of EP2040582A1 publication Critical patent/EP2040582A1/en
Application granted granted Critical
Publication of EP2040582B1 publication Critical patent/EP2040582B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Support for the head or the back
    • A47C7/40Support for the head or the back for the back
    • A47C7/44Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/448Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with resilient blocks
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Support for the head or the back
    • A47C7/40Support for the head or the back for the back
    • A47C7/402Support for the head or the back for the back adjustable in height
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Support for the head or the back
    • A47C7/40Support for the head or the back for the back
    • A47C7/405Support for the head or the back for the back with double backrests
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Support for the head or the back
    • A47C7/40Support for the head or the back for the back
    • A47C7/44Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/441Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with adjustable elasticity
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C7/00Parts, details, or accessories of chairs or stools
    • A47C7/36Support for the head or the back
    • A47C7/40Support for the head or the back for the back
    • A47C7/44Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/443Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with coil springs

Definitions

  • the invention relates to a backrest for a chair or chair with two laterally juxtaposed, resiliently held backrests, each of which is attached to a separate support member.
  • each back support is attached to a separate support member.
  • the support members are V-shaped to each other, and the lower ends of these support members are attached to the rear end of the seat on the chair frame.
  • the backrests have some flexibility due to the resilient properties of the two support members to adapt to different seating positions of a seated person, it has been shown that this construction is unable, the spine of a seated person both during prolonged sitting in itself changing seat positions, as well as to greatly relieve the individual persons in greatly varying physique.
  • the invention has for its object to design a backrest for a seat or armchair so that the seated person is optimally supported in a variety of seating positions in the area of the back or the spine.
  • each support member forms the first leg of a substantially L-shaped support
  • the second leg of each carrier is pivotable below the chair or armchair seat against spring force about a horizontal axis.
  • the carriers are connected to one another by a guide rod oriented essentially perpendicular to the carriers in the rest position mounted in or on a seat substructure and connected to the carrier, that when moving a back support forward or backward, the other back support is displaced in opposite directions, to avoid a "jump" between the two back supports this preferably resiliently to the Straps are attached, such that there is a substantially uniform, stepless backrest.
  • the guide rod is preferably articulated with its ends to the carriers and also mounted between their articulation points on the carriers hinged to the seat or the seat base.
  • Figure 1 shows a view of a backrest which is attached to a stand of an otherwise not shown armchair or chair.
  • Figure 2 shows a view of a modified embodiment of a backrest
  • FIG. 3 shows a view of a further modified embodiment of a
  • FIG. 4 shows an embodiment of the manner of attaching a back support to its support member
  • FIG. 5 shows an exploded view of the embodiment according to FIG. 4;
  • Figure 6 shows an embodiment of the manner of attachment of the
  • Figure 7 shows an isometric view of a chair
  • Figure 8 is a fragmentary isometric view of the column stand of the chair with attached seat chassis to which the backrest supports are pivotally mounted;
  • Figure 9 is an isometric view of a top view of a seat base attached to the seat chassis
  • FIG. 10 shows a schematic for explaining the principle according to the invention
  • FIG. 7 shows an isometric view of an armchair comprising a base 1.1 equipped with rollers, a column 1 supported by the base, a seat 100 and a backrest 3 with two laterally spaced back supports 3.1, which are attached to L-shaped straps 4 are attached, which consist of a substantially vertically oriented support member 4.1 and a substantially horizontally oriented support member 4.2.
  • Each back support 3.1 is attached to a support member 7 which is lockable along the associated support member 4.1 in different height positions.
  • Each support member 7 includes rubber members, such that the single back support is movable relative to the support member 4.1.
  • the support members 4.1 are interconnected by an elastically deformable cross member 9, the spring stiffness is designed so that the free mobility of the individual back support is maintained relative to the other back support to a limited extent.
  • the support members 4.2 are pivotally mounted about a horizontal pivot axis 5 by means of a support unit 2.
  • the supporting parts 4.2 of the carrier 4 are designed as two-armed lever, acting on the free lever ends 4.3 a substantially vertically aligned spring element 6, the force acting on the carrier force is variable.
  • This spring element 6 may be a tension spring, a pneumatic or hydraulic spring element or the like.
  • the back braces 3.1 are connected approximately at their center by means of an elastically deformable crossbar 3.2, whose strength is designed so that the back braces 3.1 keep their function as individual supports, the free mobility of a back support relative to the other back support to a limited extent preserved.
  • the two back supports 3.1 are likewise fastened individually on their own holding parts 4.1 of carriers 4, each by themselves.
  • the support members 7 are designed so that the upper ends of the support members 4.1 project upwardly beyond the support members 7.
  • the free ends of the holding parts 4.1 are interconnected by an elastically deformable cross member 9.
  • FIG. 6 shows a modified embodiment of the pivotable about a horizontal axis carrier.
  • horizontal shaft 20 is mounted on which the second leg 4.2 of the carrier 4 are pivotally mounted.
  • Each leg 4.2 is designed as a two-armed lever, the free lever end 4.4 is bent upwards, on which a substantially horizontally oriented tension spring 22 engages.
  • the tension springs 22 are fixed with their ends on a variable relative to the horizontal axis at different distances detectable adjusting member 23 for varying the force acting on the carrier force, the e.g. a nut 24 carries, in which a rotatable by means of a knurled wheel 26 threaded pin 25 engages.
  • Each leg 4.2 carries in the region of its bearing on the shaft 20 a threaded bushing 27, such that by turning the shaft 20 due to the opposing threaded portions of this shaft, the two legs 4.2 can be laterally adjusted relative to each other, whereby the distance between the back supports 3.1 in accordance Figures 1 and 3 can be adjusted.
  • FIG. 8 and 9 show a detail of a fixed at the upper end of the stand column 1 seat chassis 38 to which the two supports 4 in the region of the free ends of the support members 4.2 are pivotally mounted about the pivot axis 39 shown schematically.
  • a substantially box-shaped seat base 40 is fixed, for example by means of screws 41 which are guided in slots 42, such that the seat base 40 relative to the seat frame 38 is displaceable forward and backward.
  • a core idea of this teaching according to the invention consists essentially in coupling the two backrests 3.1 with one another in such a way that, when the person sitting on the chair (chair) is displaced, a displacement of the backrest, e.g. to the rear inevitably has a movement of the other back support forward. Due to the resilient suspension of the back supports on the straps 4, the two back braces 3.1 are able to assume such a position that a substantially uniform, continuous backrest is created when the user of the chair or armchair when leaning back more against the one In Figure 9 right backrest 3.1 shown leaning or stronger presses against this as against the other back support 3.1.
  • This positive coupling of the two back supports 3.1 to oppositely directed movements is effected by means of a in the rest position substantially perpendicular to the straps 4 guide rod 43, which is mounted in such or in the seat base 40 and connected to the support members 4.2, that at a backward movement of a back support 3.1 the other back support in the opposite direction, ie moved to the front, is.
  • the deflection angle of the guide rod 43 is shown with respect to the center position to illustrate the principle oversubscribed; In reality, the deflection angle is only very small, so that when pivoting the ends of the guide rod 43 perform only very small movements, which are in the range of tenths of a millimeter and are thus absorbed by the tolerance play of the construction.
  • the ends of the guide rod 43 are articulated to the respective support parts 4.2, for example by means of ball joints 44 shown schematically in FIG. 8b, which are preferably mounted in elastically deformable sleeves 44.1.
  • the guide rod 43 is also mounted in the middle between its articulation points on the support parts 4.2, preferably by means of the ball joint 45 shown in Figure 9a in or on a longitudinal member 40.2 of the seat base 50 articulated.
  • the support members 4.2 are supported by means mounted in the seat base 40 helical compression springs 46 such that the two back braces 3.1 in the unloaded rest position the have the same distance from the seat base 40 and the guide rod 43 occupies a rest or middle position.
  • the support members 4.2 are provided with upwardly directed lugs 47 on which the guide rod 43 is articulated.
  • To the lugs 47 include pressure plates 48 which are supported by means of the frame 40.1 of the box-shaped seat base 40 guided plunger 49 on the helical compression springs 46 which are aligned perpendicular to the pivot axis 39 housed in the seat base 40.
  • the helical compression springs 46 are supported on longitudinally displaceable blocks 50, which in turn are supported on cams 52 of a rotatable by means of the handle 53 camshaft 51 to change the biasing force of the spring 46 by turning the cam 52 can.
  • the guide rod 43 is guided in the frame 40.1 of the seat base 40 in arcuate guide grooves 54 whose ideal axes are parallel to the pivot axis 39 of the carrier 4 and are curved relative to the front of the chair from top to back and down.
  • the guide grooves 54 allow the tilting or pivoting movement of the guide rod 43 in the region of the ball joint 45, such that upon pivoting of the support member 4.2 to the rear of this support member is also pivoted down at the same time opposite movements of the opposite support member 4.2.
  • Figure 8 shows a position of the two support members 4.2 in a central, substantially mutually parallel position when the two back rests 3.1 are either unloaded or evenly loaded.
  • the guide rod 43 follows this rearward movement, which due to the articulated support of the guide rod 43 in or on the side rail 40.2 of the entire seat base 40 pulled back on the one hand and on the other hand at the same time is pivoted downwards or lowered in its rear region, in accordance with a seat storage with synchronous mechanism described in DE 299 08 599 Ul, which, as known, is not the subject of the present invention.
  • a synchronous mechanism is used when pivoting the backrest forward or to pivot back and the seat according to a predetermined angular ratio.
  • the rearward movement of the seat base 40 is against the force of compression springs 60 which are supported between a support plate 61 forming part of the seat chassis 38 and thus stationary, and a support surface 62 forming part of the movable seat base 40.
  • Figures 4 and 5 show how the support member 7 is attached to a back support to allow pivotal movements of this back support 3.1 relative to the support member 7 both about a vertical axis and about a horizontal axis:
  • a top and bottom open, box-shaped main body 10 is at its the support member 7 facing the end provided with two spaced preferably triangular wall sections 10.1, which have opposite Lageröffhungen 10.11.
  • a horizontally oriented bearing bushing 11 is fixed, so that after passing through an axle pin 12 by the brought with the bearing bush 11 in the alignment position bearing openings 10.11 of the main body 10 is pivotally attached to the support member 7.
  • a rubber buffer 14 is placed according to Figure 5, which is provided with a corresponding shape of the bearing bush 11 recess 14.1.
  • the spring stiffness of the rubber buffer 14 is designed so that a controlled pivoting movement of the main body 10 around the defined by the axle 12 horizontal axis 2 allow.
  • the main body 10 is provided on its side facing away from the retaining ring member 7 with an upper and lower bounded by wall sections 10.2 opening.
  • the wall sections 10.2 are provided with Lageröffhungen 10.21.
  • a fixable at the back of each back support 3.1 fastener 13 has a vertically oriented bearing bush 13.1, which carries a radially outwardly projecting partition 13.2. When the bearing bush 13.1 is brought into alignment with the Lageröffhungen 10.21, an axle pin 14.2 can be inserted through these Lageröffhungen 10.21 and the bearing bush 13.1, whereby the main body 10 is pivotally mounted about a vertical axis on the fastening element 13.

Abstract

The invention relates to a back rest for a stool or a chair, comprising two adjacent, spring-mounted back supports (3.1), each of which is fixed to a separate carrier part (4.1). Said back rest is characterised in that each carrier part (4.1) forms the first limb of an essentially L-shaped carrier (4), and the second limb (4.2) of each carrier (4) is fixed beneath the stool or chair seat in such a way that it can be pivoted about a horizontal axis against an elastic force.

Description

Rückenlehne für einen Stuhl oder Sessel und mit einer derartigen Rückenlehne ausgerüsteter Stuhl oder Sessel Backrest for a chair or armchair and chair or armchair equipped with such a backrest
Die Erfindung betrifft eine Rückenlehne für einen Stuhl oder Sessel mit zwei seitlich nebeneinander angeordneten, federnd gehaltenen Rückenstützen, von denen jede an einem gesonderten Tragteil befestigt ist.The invention relates to a backrest for a chair or chair with two laterally juxtaposed, resiliently held backrests, each of which is attached to a separate support member.
Bei einer derartigen in der DE 90 06 316 Ul beschriebenen Rückenlehne ist jede Rückenstütze an einem gesonderten Tragteil befestigt. Die Tragteile sind V-förmig zueinander ausgerichtet, und die unteren Enden dieser Trägerteile sind am hinteren Ende der Sitzfläche an dem Stuhlgestell befestigt. Obwohl die Rückenstützen aufgrund der federnden Eigenschaften der beiden Trägerteile eine gewisse Beweglichkeit haben, um sich an unterschiedliche Sitzstellungen einer sitzenden Person anzupassen, hat es sich gezeigt, dass diese Konstruktion nicht in der Lage ist, die Wirbelsäule einer sitzenden Person sowohl bei längerem Sitzen in sich verändernden Sitzlagen, als auch bei stark unterschiedlichem Körperbau der einzelnen Personen wirksam zu entlasten.In such a backrest described in DE 90 06 316 Ul each back support is attached to a separate support member. The support members are V-shaped to each other, and the lower ends of these support members are attached to the rear end of the seat on the chair frame. Although the backrests have some flexibility due to the resilient properties of the two support members to adapt to different seating positions of a seated person, it has been shown that this construction is unable, the spine of a seated person both during prolonged sitting in itself changing seat positions, as well as to greatly relieve the individual persons in greatly varying physique.
Der Erfindung liegt die Aufgabe zugrunde, eine Rückenlehne für einen Sitz oder Sessel so zu gestalten, dass die sitzende Person bei den unterschiedlichsten Sitzstellungen optimal im Bereich des Rückens bzw. der Wirbelsäule abgestützt ist. Zur Lösung dieser Aufgabe ist gemäß Anspruch 1 vorgesehen, dass jedes Trägerteil den ersten Schenkel eines im wesentlichen L-förmigen Trägers bildet, und dass der zweite Schenkel jedes Trägers unterhalb des Stuhl- oder Sesselsitzes entgegen Federkraft um eine Horizontalachse schwenkbar ist. Auf diese Weise ist gewährleistet, dass jede Rückenstütze in Abhängigkeit von den unterschiedlichsten Bewegungen bzw. Sitzstellungen einer sitzenden Person optimal der Rückenbewegung folgt, ohne ihre Stützfunktion zu verlieren.The invention has for its object to design a backrest for a seat or armchair so that the seated person is optimally supported in a variety of seating positions in the area of the back or the spine. To achieve this object is provided according to claim 1, that each support member forms the first leg of a substantially L-shaped support, and that the second leg of each carrier is pivotable below the chair or armchair seat against spring force about a horizontal axis. In this way, it is ensured that each back support optimally follows the back movement, depending on the different movements or sitting positions of a seated person, without losing their support function.
Um zu erreichen, dass die sitzende Person auch bei seitlich oder seitlich nach hinten gerichteten Bewegungen optimal abgestützt ist, ist gemäß weiterer Erfindung vorgesehen, dass die Träger durch eine in der Ruhestellung im wesentlichen senkrecht zu den Trägern ausgerichtete Führungsstange miteinander in Verbindung stehen, die derart in bzw. an einem Sitzunterbau gelagert und mit dem Träger verbunden ist, dass bei Verschieben der einen Rückenstütze nach vorn oder hinten die andere Rückenstütze in jeweils entgegengesetzter Richtung verschoben wird, wobei zum Vermeiden eines „Sprungs" zwischen den beiden Rückenstützen diese vorzugsweise federnd an den Trägern befestigt sind, derart, das eine im wesentlichen gleichmäßige, stufenlose Rückenlehne vorliegt.In order to ensure that the seated person is optimally supported even in the case of laterally or laterally rearward movements, it is provided according to a further invention that the carriers are connected to one another by a guide rod oriented essentially perpendicular to the carriers in the rest position mounted in or on a seat substructure and connected to the carrier, that when moving a back support forward or backward, the other back support is displaced in opposite directions, to avoid a "jump" between the two back supports this preferably resiliently to the Straps are attached, such that there is a substantially uniform, stepless backrest.
Die Führungsstange ist vorzugsweise mit ihren Enden an den Trägern angelenkt und zwischen ihren Anlenkpunkten an den Trägern ebenfalls gelenkig an den Sitz bzw. dem Sitzunterbau gelagert.The guide rod is preferably articulated with its ends to the carriers and also mounted between their articulation points on the carriers hinged to the seat or the seat base.
Weitere bevorzugte Ausgestaltungen der Erfindung sind in Unteransprüchen behandelt.Further preferred embodiments of the invention are treated in subclaims.
Die Erfindung wird im folgenden unter Bezugnahme auf die beigefügten Zeichnungen beschrieben.The invention will be described below with reference to the accompanying drawings.
Figur 1 zeigt eine Ansicht einer Rückenlehne, die an einem Ständer eines ansonsten nicht dargestellten Sessels oder Stuhls befestigt ist.Figure 1 shows a view of a backrest which is attached to a stand of an otherwise not shown armchair or chair.
Figur 2 zeigt eine Ansicht einer abgewandelten Ausführungsform einer Rückenlehne;Figure 2 shows a view of a modified embodiment of a backrest;
Figur 3 zeigt eine Ansicht einer weiteren abgewandelten Ausführungsform einerFIG. 3 shows a view of a further modified embodiment of a
Rückenlehne;Backrest;
Figur 4 zeigt eine Ausführungsform der Art und Weise der Befestigung einer Rückenstütze an ihrem Trägerteil; Figur 5 zeigt eine Explosionsdarstellung der Ausführungsform gemäß Figur 4;Figure 4 shows an embodiment of the manner of attaching a back support to its support member; FIG. 5 shows an exploded view of the embodiment according to FIG. 4;
Figur 6 zeigt eine Ausfuhrungsform der Art und Weise der Befestigung derFigure 6 shows an embodiment of the manner of attachment of the
Rückenstützenträger an dem Ständer eines Sessels oder Stuhls;Backrest support on the stand of a chair or chair;
Figur 7 zeigt eine isometrische Ansicht eines Sessels;Figure 7 shows an isometric view of a chair;
Figur 8 zeigt ausschnittsweise in isometrischer Darstellung die Ständersäule des Sessels mit daran angebrachtem Sitzchassis, an dem die Träger für die Rückenstützen schwenkbar befestigt sind;Figure 8 is a fragmentary isometric view of the column stand of the chair with attached seat chassis to which the backrest supports are pivotally mounted;
Figur 9 zeigt in isometrischer Darstellung eine Draufsicht eines an dem Sitzchassis befestigten Sitzunterbaus;Figure 9 is an isometric view of a top view of a seat base attached to the seat chassis;
Figur 10 zeigt zur Erläuterung des erfindungsgemäßen Prinzips eine schematisierteFIG. 10 shows a schematic for explaining the principle according to the invention
Teilansicht der Rückenlehnenkonstruktion in Zuordnung zu dem Sitzunterbau.Partial view of the backrest construction in association with the seat base.
Figur 7 zeigt eine isometrische Ansicht eines Sessels, bestehend aus einem mit Laufrollen ausgerüsteten Fußkreuz 1.1, einer von dem Fußkreuz getragenen Ständersäule 1, einer Sitzfläche 100 und einer Rückenlehne 3 mit zwei in seitlichem Abstand voneinander angeordneten Rückenstützen 3.1, die an L-förmigen Trägern 4 befestigt sind, die aus einem im wesentlichen vertikal ausgerichteten Trägerteil 4.1 und einem im wesentlichen horizontal ausgerichteten Trägerteil 4.2 bestehen. Jede Rückenstütze 3.1 ist an einem Halterungsglied 7 befestigt, das entlang des zugeordneten Trägerteils 4.1 in unterschiedlichen Höhenstellungen feststellbar ist. Jedes Halterungsglied 7 enthält Gummielemente, derart, dass die einzelne Rückenstütze relativ zum Trägerteil 4.1 beweglich ist. Die Trägerteile 4.1 sind durch eine elastisch verformbare Querstrebe 9 miteinander verbunden, deren Federsteifigkeit so ausgelegt ist, dass die freie Beweglichkeit der einzelnen Rückenstütze relativ zu der anderen Rückenstütze in eingeschränktem Umfang erhalten bleibt.FIG. 7 shows an isometric view of an armchair comprising a base 1.1 equipped with rollers, a column 1 supported by the base, a seat 100 and a backrest 3 with two laterally spaced back supports 3.1, which are attached to L-shaped straps 4 are attached, which consist of a substantially vertically oriented support member 4.1 and a substantially horizontally oriented support member 4.2. Each back support 3.1 is attached to a support member 7 which is lockable along the associated support member 4.1 in different height positions. Each support member 7 includes rubber members, such that the single back support is movable relative to the support member 4.1. The support members 4.1 are interconnected by an elastically deformable cross member 9, the spring stiffness is designed so that the free mobility of the individual back support is maintained relative to the other back support to a limited extent.
Gemäß den Figuren 1 bis 3 sind die Trägerteile 4.2 mittels einer Trageinheit 2 um eine horizontale Schwenkachse 5 schwenkbar gelagert. Die Tragteile 4.2 des Trägers 4 sind als zweiarmige Hebel ausgebildet, auf deren freie Hebelenden 4.3 ein im wesentlichen vertikal ausgerichtetes Federelement 6 einwirkt, dessen auf den Träger einwirkende Kraft veränderbar ist. Bei diesem Federelement 6 kann es sich um eine Zugfeder, ein pneumatisches oder hydraulisches Federelement oder dergleichen handeln.According to Figures 1 to 3, the support members 4.2 are pivotally mounted about a horizontal pivot axis 5 by means of a support unit 2. The supporting parts 4.2 of the carrier 4 are designed as two-armed lever, acting on the free lever ends 4.3 a substantially vertically aligned spring element 6, the force acting on the carrier force is variable. This spring element 6 may be a tension spring, a pneumatic or hydraulic spring element or the like.
Im Bereich der Trägerteile 4.1 dargestellte Einrastöffhungen 8 verdeutlichen, dass die Halterungsglieder 7 höhenverstellbar an den Trägerteilen 4.1 befestigt sind. Gemäß Figur 2 sind die Rückenstützen 3.1 etwa in ihrer Mitte mittels eines elastisch verformbaren Quersteges 3.2 verbunden, dessen Festigkeit so ausgelegt ist, dass die Rückenstützen 3.1 ihre Funktion als Einzelstützen behalten, wobei die freie Beweglichkeit der einen Rückenstütze relativ zu der anderen Rückenstütze in eingeschränktem Umfang erhalten bleibt.In the region of the support members 4.1 Einrastöffhungen 8 illustrated that the support members 7 are height-adjustable attached to the support members 4.1. According to Figure 2, the back braces 3.1 are connected approximately at their center by means of an elastically deformable crossbar 3.2, whose strength is designed so that the back braces 3.1 keep their function as individual supports, the free mobility of a back support relative to the other back support to a limited extent preserved.
Gemäß Figur 3 sind die beiden Rückenstützen 3.1 ebenfalls jeweils für sich allein federnd an eigenen Halteteilen 4.1 von Trägern 4 befestigt. Bei dieser Rückenlehne sind die Halterungsglieder 7 so ausgeführt, dass die oberen Enden der Trägerteile 4.1 nach oben über die Halterungsglieder 7 vorstehen. Die freien Enden der Halteteile 4.1 sind durch eine elastisch verformbare Querstrebe 9 miteinander verbunden.According to FIG. 3, the two back supports 3.1 are likewise fastened individually on their own holding parts 4.1 of carriers 4, each by themselves. In this backrest, the support members 7 are designed so that the upper ends of the support members 4.1 project upwardly beyond the support members 7. The free ends of the holding parts 4.1 are interconnected by an elastically deformable cross member 9.
Figur 6 zeigt eine abgewandelte Ausführungssform der um eine Horizontalachse verschwenkbaren Träger. In bzw. an der Trageinheit 2 ist eine mit gegenläufigen Gewinden versehene Horizontalwelle 20 gelagert, auf der die zweiten Schenkel 4.2 der Träger 4 schwenkbar gelagert sind. Jeder Schenkel 4.2 ist als zweiarmiger Hebel ausgebildet, dessen freies Hebelende 4.4 nach oben abgekröpft ist, an dem eine im wesentlichen horizontal ausgerichtete Zugfeder 22 angreift. Die Zugfedern 22 sind zur Veränderung der auf die Träger einwirkenden Kraft mit ihren Enden an einem relativ zur Horizontalachse in unterschiedlichen Abständen feststellbaren Verstellglied 23 befestigt, das z.B. eine Mutter 24 trägt, in die ein mittels eines Rändelrades 26 drehbarer Gewindestift 25 eingreift. Jeder Schenkel 4.2 trägt im Bereich seiner Lagerstelle auf der Welle 20 eine Gewindebuchse 27, derart, dass durch Drehen der Welle 20 infolge der gegenläufigen Gewindeabschnitte dieser Welle die beiden Schenkel 4.2 relativ zueinander seitlich verstellt werden können, wodurch auch der Abstand zwischen den Rückenstützen 3.1 gemäß den Figuren 1 und 3 verstellt werden kann.Figure 6 shows a modified embodiment of the pivotable about a horizontal axis carrier. In or on the support unit 2 is provided with opposing threads horizontal shaft 20 is mounted on which the second leg 4.2 of the carrier 4 are pivotally mounted. Each leg 4.2 is designed as a two-armed lever, the free lever end 4.4 is bent upwards, on which a substantially horizontally oriented tension spring 22 engages. The tension springs 22 are fixed with their ends on a variable relative to the horizontal axis at different distances detectable adjusting member 23 for varying the force acting on the carrier force, the e.g. a nut 24 carries, in which a rotatable by means of a knurled wheel 26 threaded pin 25 engages. Each leg 4.2 carries in the region of its bearing on the shaft 20 a threaded bushing 27, such that by turning the shaft 20 due to the opposing threaded portions of this shaft, the two legs 4.2 can be laterally adjusted relative to each other, whereby the distance between the back supports 3.1 in accordance Figures 1 and 3 can be adjusted.
Die Figuren 8 und 9 zeigen ausschnittsweise ein am oberen Ende der Ständersäule 1 befestigtes Sitzchassis 38, an dem die beiden Träger 4 im Bereich der freien Enden der Trägerteile 4.2 um die schematisiert dargestellte Schwenkachse 39 schwenkbar befestigt sind. Auf dem Sitzchassis 38 ist ein im wesentlichen kastenförmiger Sitzunterbau 40 beispielsweise mittels Schrauben 41 befestigt, die in Langlöchern 42 geführt sind, derart, dass der Sitzunterbau 40 relativ zum Sitzchassis 38 nach vorn und hinten verschiebbar ist. Das erfindungsgemäße Prinzip dieser Konstruktion wird im folgenden anhand der schematisierten Darstellung von Figur 9 beschrieben.Figures 8 and 9 show a detail of a fixed at the upper end of the stand column 1 seat chassis 38 to which the two supports 4 in the region of the free ends of the support members 4.2 are pivotally mounted about the pivot axis 39 shown schematically. On the seat chassis 38, a substantially box-shaped seat base 40 is fixed, for example by means of screws 41 which are guided in slots 42, such that the seat base 40 relative to the seat frame 38 is displaceable forward and backward. The inventive principle of this construction will be described below with reference to the schematic representation of FIG.
Ein Kerngedanke dieser erfmdungsgemäßen Lehre besteht im wesentlichen darin, die beiden Rückenstützen 3.1 so miteinander zu koppeln, dass bei einer Sitzverlagerung der auf dem Sessel (Stuhl) sitzenden Person eine Verschiebung der einen Rückenstütze z.B. nach hinten zwangsläufig eine Bewegung der anderen Rückenstütze nach vorn zur Folge hat. Durch die federnden Aufhängung der Rückenstützen an den Trägern 4 sind die beiden Rückenstützen 3.1 in der Lage, eine solche Stellung einzunehmen, dass eine im wesentlichen gleichmäßige, stufenlose Rückenlehne entsteht, wenn der Benutzer des Stuhls bzw. Sessels sich beim seitlichen Zurücklehnen stärker gegen die eine in Figur 9 rechts dargestellte Rückenstütze 3.1 anlehnt bzw. stärker gegen diese drückt als gegen die andere Rückenstütze 3.1. Diese zwangsläufige Kopplung der beiden Rückenstützen 3.1 zu entgegengesetzt gerichteten Bewegungen wird mittels einer in der Ruhestellung im wesentlichen senkrecht zu den Trägern 4 ausgerichteten Führungsstange 43 bewirkt, die derart in bzw. an dem Sitzunterbau 40 gelagert und mit den Trägerteilen 4.2 verbunden ist, dass bei einer nach hinten gerichteten Bewegung der einen Rückenstütze 3.1 die andere Rückenstütze in entgegengesetzter Richtung, d.h. nach vorn verschoben, wird. In Figur 9 ist der Auslenkwinkel der Führungsstange 43 gegenüber der Mittelstellung zur Verdeutlichung des Prinzips überzeichnet dargestellt; in Wirklichkeit ist der Auslenkwinkel nur sehr gering, so dass beim Verschwenken die Enden der Führungsstange 43 nur sehr geringe Bewegungen ausführen, die im Bereich von Zehntel Millimeter liegen und damit von dem Toleranzspiel der Konstruktion aufgefangen werden.A core idea of this teaching according to the invention consists essentially in coupling the two backrests 3.1 with one another in such a way that, when the person sitting on the chair (chair) is displaced, a displacement of the backrest, e.g. to the rear inevitably has a movement of the other back support forward. Due to the resilient suspension of the back supports on the straps 4, the two back braces 3.1 are able to assume such a position that a substantially uniform, continuous backrest is created when the user of the chair or armchair when leaning back more against the one In Figure 9 right backrest 3.1 shown leaning or stronger presses against this as against the other back support 3.1. This positive coupling of the two back supports 3.1 to oppositely directed movements is effected by means of a in the rest position substantially perpendicular to the straps 4 guide rod 43, which is mounted in such or in the seat base 40 and connected to the support members 4.2, that at a backward movement of a back support 3.1 the other back support in the opposite direction, ie moved to the front, is. In Figure 9, the deflection angle of the guide rod 43 is shown with respect to the center position to illustrate the principle oversubscribed; In reality, the deflection angle is only very small, so that when pivoting the ends of the guide rod 43 perform only very small movements, which are in the range of tenths of a millimeter and are thus absorbed by the tolerance play of the construction.
Die Enden der Führungsstange 43 sind an den jeweiligen Trägerteilen 4.2 angelenkt, beispielsweise mittels in Figur 8b schematisiert dargestellten Kugelgelenken 44, die vorzugsweise in elastisch verformbaren Hülsen 44.1 gelagert sind. Die Führungsstange 43 ist mittig zwischen ihren Anlenkpunkten an den Trägerteilen 4.2 ebenfalls vorzugsweise mittels des in Figur 9a dargestellten Kugelgelenks 45 in bzw. an einem Längsträger 40.2 des Sitzunterbaus 50 gelenkig gelagert.The ends of the guide rod 43 are articulated to the respective support parts 4.2, for example by means of ball joints 44 shown schematically in FIG. 8b, which are preferably mounted in elastically deformable sleeves 44.1. The guide rod 43 is also mounted in the middle between its articulation points on the support parts 4.2, preferably by means of the ball joint 45 shown in Figure 9a in or on a longitudinal member 40.2 of the seat base 50 articulated.
Die Trägerteile 4.2 sind mittels in dem Sitzunterbau 40 angebrachten Schraubendruckfedern 46 derart abgestützt, dass die beiden Rückenstützen 3.1 in der unbelasteten Ruhestellung den gleichen Abstand von dem Sitzunterbau 40 haben und die Führungsstange 43 eine Ruhe- bzw. Mittelstellung einnimmt.The support members 4.2 are supported by means mounted in the seat base 40 helical compression springs 46 such that the two back braces 3.1 in the unloaded rest position the have the same distance from the seat base 40 and the guide rod 43 occupies a rest or middle position.
Gemäß Figur 8 sind die Trägerteile 4.2 mit nach oben gerichteten Ansätzen 47 versehen, an denen die der Führungsstange 43 angelenkt ist. An die Ansätze 47 schließen Druckplatten 48 an, die mittels durch den Rahmen 40.1 des kastenförmigen Sitzunterbaus 40 hindurchgeführter Stößel 49 auf den Schraubdruckfedern 46 abgestützt sind, die senkrecht zur Schwenkachse 39 ausgerichtet in dem Sitzunterbau 40 untergebracht sind. Die Schraubendruckfedern 46 sind auf in Federlängsrichtung verschiebbaren Blöcken 50 abgestützt, die ihrerseits auf Nocken 52 einer mittels des Handgriffs 53 drehbaren Nockenwelle 51 abgestützt sind, um durch Drehen der Nocken 52 die Vorspannkraft der Feder 46 verändern zu können.According to Figure 8, the support members 4.2 are provided with upwardly directed lugs 47 on which the guide rod 43 is articulated. To the lugs 47 include pressure plates 48 which are supported by means of the frame 40.1 of the box-shaped seat base 40 guided plunger 49 on the helical compression springs 46 which are aligned perpendicular to the pivot axis 39 housed in the seat base 40. The helical compression springs 46 are supported on longitudinally displaceable blocks 50, which in turn are supported on cams 52 of a rotatable by means of the handle 53 camshaft 51 to change the biasing force of the spring 46 by turning the cam 52 can.
Die Führungsstange 43 ist im Rahmen 40.1 des Sitzunterbaus 40 in bogenförmigen Führungsnuten 54 geführt, deren ideelle Achsen parallel zur Schwenkachse 39 der Träger 4 liegen und bezogen auf die Stuhlvorderseite von oben nach hinten und unten gekrümmt sind.The guide rod 43 is guided in the frame 40.1 of the seat base 40 in arcuate guide grooves 54 whose ideal axes are parallel to the pivot axis 39 of the carrier 4 and are curved relative to the front of the chair from top to back and down.
Die Führungsnuten 54 ermöglichen die Kipp- bzw. Schwenkbewegung der Führungsstange 43 im Bereich des Kugelgelenks 45, derart, dass bei Verschwenken des Trägerteils 4.2 nach hinten dieses Trägerteils auch nach unten bei gleichzeitig entgegengesetzten Bewegungen des gegenüberliegenden Trägerteils 4.2 verschwenkt wird.The guide grooves 54 allow the tilting or pivoting movement of the guide rod 43 in the region of the ball joint 45, such that upon pivoting of the support member 4.2 to the rear of this support member is also pivoted down at the same time opposite movements of the opposite support member 4.2.
Figur 8 zeigt eine Position der beiden Trägerteile 4.2 in einer mittleren, im wesentlichen parallel zueinander liegenden Stellung, wenn die beiden Rückenstützen 3.1 entweder unbelastet oder gleichmäßig belastet sind.Figure 8 shows a position of the two support members 4.2 in a central, substantially mutually parallel position when the two back rests 3.1 are either unloaded or evenly loaded.
Wenn ein Benutzer sich bei gleichmäßiger Belastung beider Rückenstützen 3.1 nach hinten zurücklehnt, folgt die Führungsstange 43 dieser nach hinten gerichteten Bewegung, wodurch aufgrund der gelenkigen Lagerung der Führungsstange 43 in bzw. an dem Längsträger 40.2 der gesamte Sitzunterbau 40 einerseits nach hinten gezogen und andererseits gleichzeitig in seinem hinteren Bereich nach unten verschwenkt bzw. abgesenkt wird, und zwar entsprechend einer in der DE 299 08 599 Ul beschriebenen Sitzteillagerung mit Synchronmechanik, die, da bekannt, nicht Gegenstand der vorliegenden Erfindung ist. Eine solche Synchronmechanik dient dazu, bei Verschwenken der Rückenlehne nach vorn oder nach hinten auch die Sitzfläche entsprechend einem vorgegebenen Winkelverhältnis zu verschwenken.If a user leans backwards under uniform load both back braces 3.1, the guide rod 43 follows this rearward movement, which due to the articulated support of the guide rod 43 in or on the side rail 40.2 of the entire seat base 40 pulled back on the one hand and on the other hand at the same time is pivoted downwards or lowered in its rear region, in accordance with a seat storage with synchronous mechanism described in DE 299 08 599 Ul, which, as known, is not the subject of the present invention. Such a synchronous mechanism is used when pivoting the backrest forward or to pivot back and the seat according to a predetermined angular ratio.
Die nach hinten gerichtete Bewegung des Sitzunterbaus 40 erfolgt entgegen der Kraft von Druckfedern 60, die zwischen einer einen Teil des Sitzchassis 38 bildenden und damit stationären Stützplatte 61 und einer einen Teil des beweglichen Sitzunterbaus 40 bildenden Stützfläche 62 abgestützt sind.The rearward movement of the seat base 40 is against the force of compression springs 60 which are supported between a support plate 61 forming part of the seat chassis 38 and thus stationary, and a support surface 62 forming part of the movable seat base 40.
Die Figuren 4 und 5 zeigen, wie das Halterungsglied 7 an einer Rückenstütze befestigt ist, um Schwenkbewegungen dieser Rückenstütze 3.1 relativ zum Halterungsglied 7 sowohl um eine Vertikalachse als auch um eine Horizontalachse zu ermöglichen: Ein oben und unten offener, kastenförmiger Hauptkörper 10 ist an seinem dem Halterungsglied 7 zugewandten Ende mit zwei im Abstand liegenden vorzugsweise dreieckigen Wandabschnitten 10.1 versehen, die sich gegenüber liegende Lageröffhungen 10.11 aufweisen. An dem Halterungsglied 7 ist eine horizontal ausgerichtete Lagerbuchse 11 befestigt, so dass nach dem Hindurchstecken eines Achsstiftes 12 durch die mit der Lagerbuchse 11 in Fluchtstellung gebrachten Lageröffnungen 10.11 der Hauptkörper 10 verschwenkbar an dem Halterungsglied 7 befestigt ist. In den Raum zwischen dem Hauptkörper 10 und dem Halterungsglied 7 ist gemäß Figur 5 ein Gummipuffer 14 gelegt, der mit einer der Form der Lagerbuchse 11 entsprechenden Ausnehmung 14.1 versehen ist. Die Federsteifϊgkeit des Gummipuffers 14 ist so ausgelegt, dass eine kontrollierte Schwenkbewegung des Hauptkörpers 10 um die durch den Achsstift 12 definierte Horizontalachse 2 ermöglichen.Figures 4 and 5 show how the support member 7 is attached to a back support to allow pivotal movements of this back support 3.1 relative to the support member 7 both about a vertical axis and about a horizontal axis: A top and bottom open, box-shaped main body 10 is at its the support member 7 facing the end provided with two spaced preferably triangular wall sections 10.1, which have opposite Lageröffhungen 10.11. On the support member 7, a horizontally oriented bearing bushing 11 is fixed, so that after passing through an axle pin 12 by the brought with the bearing bush 11 in the alignment position bearing openings 10.11 of the main body 10 is pivotally attached to the support member 7. In the space between the main body 10 and the support member 7, a rubber buffer 14 is placed according to Figure 5, which is provided with a corresponding shape of the bearing bush 11 recess 14.1. The spring stiffness of the rubber buffer 14 is designed so that a controlled pivoting movement of the main body 10 around the defined by the axle 12 horizontal axis 2 allow.
Der Hauptkörper 10 ist an seiner von dem Halteringsglied 7 abgewandten Seite mit einer oben und unten durch Wandabschnitte 10.2 begrenzten Öffnung versehen. Die Wandabschnitte 10.2 sind mit Lageröffhungen 10.21 versehen. Ein an der Rückseite jeder Rückenstütze 3.1 festschraubbares Befestigungselement 13 hat eine vertikal ausgerichtete Lagerbuchse 13.1, die eine radial nach außen vorspringende Trennwand 13.2 trägt. Wenn die Lagerbuchse 13.1 in Fluchtstellung mit den Lageröffhungen 10.21 gebracht ist, kann ein Achsstift 14.2 durch diese Lageröffhungen 10.21 und die Lagerbuchse 13.1 hindurchgesteckt werden, wodurch der Hauptkörper 10 um eine Vertikalachse verschwenkbar an dem Befestigungselement 13 befestigt ist. Die Trennwand 13.2 begrenzt innerhalb des hülsenformigen Hauptkörpers 10 zwei Aufhahrnräume für Federelemente 15, vorzugsweise zylindrische Gummipuffer, deren Abmessungen und Federsteifigkeit so ausgelegt sind, dass eine eingeschränkte Relativbewegung zwischen dem Befestigungselement 13 und dem Hauptkörper 10 um die durch den Achsstift 11 definierte Vertikalachse möglich ist. The main body 10 is provided on its side facing away from the retaining ring member 7 with an upper and lower bounded by wall sections 10.2 opening. The wall sections 10.2 are provided with Lageröffhungen 10.21. A fixable at the back of each back support 3.1 fastener 13 has a vertically oriented bearing bush 13.1, which carries a radially outwardly projecting partition 13.2. When the bearing bush 13.1 is brought into alignment with the Lageröffhungen 10.21, an axle pin 14.2 can be inserted through these Lageröffhungen 10.21 and the bearing bush 13.1, whereby the main body 10 is pivotally mounted about a vertical axis on the fastening element 13. The partition wall 13.2 bounded within the sleeve-shaped main body 10 two Aufhahrnräume for spring elements 15, preferably cylindrical rubber buffers whose Dimensions and spring stiffness are designed so that a limited relative movement between the fastening element 13 and the main body 10 is possible about the vertical axis defined by the axle pin 11.

Claims

Patentansprüche claims
1. Rückenlehne für einen Stuhl oder Sessel mit zwei seitlich nebeneinander angeordneten, federnd gehaltenen Rückenstützen (3.1), von denen jede an einem gesonderten Trägerteil (4.1) befestigt ist, dadurch gekennzeichnet, dass jedes Trägerteil (4.1) den ersten Schenkel eines im wesentlichen L-förmigen Trägers (4) bildet, und dass der zweite Schenkel (4.2) jedes Trägers (4) unterhalb des Stuhl- oder Sesselsitzes entgegen Federkraft um eine Hotizontalachse (5 bzw. 39) verschwenkbar befestigt ist.1. A backrest for a chair or armchair with two laterally juxtaposed, resiliently supported back supports (3.1), each of which is attached to a separate support member (4.1), characterized in that each support member (4.1) the first leg of a substantially L shaped support (4), and that the second leg (4.2) of each support (4) below the chair or armchair seat against spring force about a Hotizontalachse (5 or 39) is pivotally mounted.
2. Rückenlehne nach Anspruch 1, dadurch gekennzeichnet, dass die Träger (4) durch eine in der Ruhestellung im wesentlichen senkrecht zu den Trägern (4) ausgerichtete Führungsstange (43) in Verbindung stehen, die derart in bzw. an einem Sitzunterbau (40) gelagert und mit dem Träger (4) verbunden ist, dass bei Verschieben der einen Rückenstütze (3.1) nach vorn oder hinten die andere Rückenstütze (3.1) in jeweils entgegengesetzter Richtung verschoben wird.2. backrest according to claim 1, characterized in that the carrier (4) by a in the rest position substantially perpendicular to the supports (4) aligned guide rod (43) are in communication in such or in a seat base (40) mounted and connected to the carrier (4), that when moving the one back support (3.1) forward or backward, the other back support (3.1) is moved in each opposite direction.
3. Rückenlehne nach Anspruch 2, dadurch gekennzeichnet, dass die Enden der Führungsstange (43) an den Trägern (4) vorzugsweise mittels eines Kugelgelenks (44) angelenkt sind, das in einer elastisch verformbaren Hülse (44.1) gelagert ist.3. Backrest according to claim 2, characterized in that the ends of the guide rod (43) on the supports (4) are preferably articulated by means of a ball joint (44) which is mounted in an elastically deformable sleeve (44.1).
4. Rückenlehne nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass die Führungsstange (43) zwischen ihren Anlenkpunkten an den Trägern (4) gelenkig an dem Sitz bzw. Sitzunterbau (40) gelagert ist.4. Backrest according to claim 2 or 3, characterized in that the guide rod (43) between its articulation points on the supports (4) is articulated to the seat or seat base (40) is mounted.
5. Rückenlehne nach Anspruch 4, dadurch gekennzeichnet, dass die Führungsstange (43) mittels eines Kugelgelenks (45) gelagert ist.5. Backrest according to claim 4, characterized in that the guide rod (43) by means of a ball joint (45) is mounted.
6. Rückenlehne nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass die Führungsstange (43) in in bzw. an dem Sitzunterbau (40) angebrachten bogenförmigen Führungsnuten (44, 54) geführt ist, deren ideelle Achsen parallel zur Schwenkachse (39) der Träger (4) liegen und bezogen auf die Stuhlvorderseite von oben nach hinten und unten gekrümmt sind. 6. Backrest according to one of claims 2 to 5, characterized in that the guide rod (43) in in or on the seat base (40) mounted arcuate guide grooves (44, 54) is guided whose ideal axes parallel to the pivot axis (39). the carrier (4) lie and are curved with respect to the front of the chair from top to back and down.
7. Rückenlehne nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, dass die Führungsstange (43) an den zweiten Schenkeln (4.2) der L-förmigen Träger (4) angelenkt ist.7. Backrest according to one of claims 2 to 6, characterized in that the guide rod (43) on the second legs (4.2) of the L-shaped support (4) is articulated.
8. Rückenlehne nach Anspruch 7, dadurch gekennzeichnet, dass die zweiten Schenkel (4.2) jeweils einen nach oben gerichteten Ansatz (47) haben, und dass die Ansätze (47) von Federn (46) abgestützt sind, die in der Ruhestellung der L-förmigen Träger (4) gleichmäßig druckbelastet sind.8. Backrest according to claim 7, characterized in that the second leg (4.2) each have an upwardly directed projection (47), and that the lugs (47) are supported by springs (46) which in the rest position of the L- shaped support (4) are evenly loaded with pressure.
9. Rückenlehne nach Anspruch 8, dadurch gekennzeichnet, dass die Federn (46) Schraubenfedern sind, deren Längsachsen senkrecht zur Schwenkachse (39) der Träger (4) liegen und im Bereich des Sitzunterbaus (40) angeordnet sind.9. Backrest according to claim 8, characterized in that the springs (46) are coil springs whose longitudinal axes are perpendicular to the pivot axis (39) of the carrier (4) and in the region of the seat base (40) are arranged.
10. Rückenlehne nach Anspruch 9, dadurch gekennzeichnet, dass an den Ansätzen (47) Druckplatten (48) angebracht sind, die über Stößel (49) auf den Federn (46) abgestützt sind.10. Backrest according to claim 9, characterized in that on the lugs (47) pressure plates (48) are mounted, which are supported on plungers (49) on the springs (46).
11. Rückenlehne nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass die Vorspannkraft der Federn (46) veränderbar ist.11. Backrest according to one of claims 8 to 10, characterized in that the biasing force of the springs (46) is variable.
12. Rückenlehne nach Anspruch 11, dadurch gekennzeichnet, dass die Federn (46) mit ihren den Druckplatten (48) gegenüberliegenden Enden gegen in Federlängsrichtung verschiebbare Blöcke (50) anliegen, die auf Nocken (52) einer von außen drehbaren Nockenwelle (51) abgestützt sind.12. A backrest according to claim 11, characterized in that the springs (46) abut with their pressure plates (48) opposite ends against slidable in the spring longitudinal direction blocks (50) on cams (52) of an externally rotatable camshaft (51) are.
13. Rückenlehne nach einem der Ansprüche 2 bis 12, dadurch gekennzeichnet, dass die Führungsstange (43) an dem mittels Federn (60) abgestützten Sitzunterbau (40) derart befestigt ist, dass dieser Sitzunterbau (40) bei Verschwenken der Träger (4) relativ zum Sitzchassis (48) nach vorn oder hinten verschiebbar ist.13. Backrest according to one of claims 2 to 12, characterized in that the guide rod (43) on the means of springs (60) supported seat base (40) is fixed such that this seat base (40) upon pivoting of the carrier (4) relative to the seat chassis (48) is displaceable forward or backward.
14. Rückenlehne nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass die Rückenstützen (3.1) federnd an den Trägerteilen (4.1) befestigt sind. 14. Backrest according to one of claims 1 to 13, characterized in that the back supports (3.1) are resiliently fixed to the support parts (4.1).
15. Rückenlehne nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass die Rückenstützen (3.1) um im wesentlichen vertikal ausgerichtete Achslinien verschwenkbar an den Trägerteilen (4.1) befestigt sind.15. Backrest according to one of claims 1 to 14, characterized in that the back supports (3.1) are mounted to substantially vertically aligned axis lines pivotally mounted on the support parts (4.1).
16. Rückenlehne nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, dass die Rückenstützen (3.1) entlang der Trägerteile (4.1) in unterschiedlichen Höhenstellungen positionierbar sind.16. Backrest according to one of claims 1 to 15, characterized in that the back supports (3.1) along the support members (4.1) are positionable in different height positions.
17. Rückenlehne nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, dass die Rückenstützen (3.1) an entlang der Trägerteile (4.1) verschiebbaren Halterungsgliedern (7) befestigt sind.17. Backrest according to one of claims 1 to 16, characterized in that the back supports (3.1) are attached to the support members (4.1) displaceable support members (7).
18. Rückenlehne nach einem der Ansprüche 1 bis 17, dadurch gekennzeichnet, dass die beiden Rückenstützen (3.1) mittels eines elastisch verformbaren Quersteges (9) miteinander verbunden sind, dessen Festigkeit so ausgelegt ist, dass die beiden Rückenstützen (3.1) ihre Funktion als Einzelstütze behalten und die Beweglichkeit der einen Rückenstütze relativ zu der anderen Rückenstütze in eingeschränktem Umfang erhalten bleibt.18. Backrest according to one of claims 1 to 17, characterized in that the two backrests (3.1) by means of an elastically deformable transverse web (9) are interconnected, whose strength is designed so that the two backrests (3.1) their function as a single support retain the mobility of a back support relative to the other back support to a limited extent.
19. Sessel oder Stuhl, dadurch gekennzeichnet, dass er mit einer Rückenlehne gemäß einem der Ansprüche 1 bis 18 ausgerüstet ist.19. armchair or chair, characterized in that it is equipped with a backrest according to one of claims 1 to 18.
20. Rückenlehne nach Anspruch 1, dadurch gekennzeichnet, dass jedes Trägerteil (4.2) im wesentlichen vertikal ausgerichtet ist.20. Backrest according to claim 1, characterized in that each carrier part (4.2) is aligned substantially vertically.
21. Rückenlehne nach Anspruch 20, dadurch gekennzeichnet, dass die auf die Träger (4) einwirkende Federkraft gemeinsam veränderbar ist.21. A backrest according to claim 20, characterized in that on the carrier (4) acting spring force is mutually variable.
22. Rückenlehne nach einem der Ansprüche 20 bis 21, dadurch gekennzeichnet, dass die beiden Träger (4) entlang ihrer gemeinsamen horizontalen Schwenkachse in unterschiedlichen Abständen voneinander fixierbar sind.22. Backrest according to one of claims 20 to 21, characterized in that the two supports (4) along their common horizontal pivot axis at different distances from each other can be fixed.
23. Rückenlehne nach einem der Ansprüche 20 bis 22 gekennzeichnet, dass jede Rückenstütze (3.1) relativ zu ihrem Trägerteil (4.1) um eine Horizontalachse verschwenkbar ist.23. Backrest according to one of claims 20 to 22, characterized in that each back support (3.1) relative to its support part (4.1) about a horizontal axis is pivotable.
24. Rückenlehne nach Anspruch 23, dadurch gekennzeichnet, dass jede Rückenstütze (3) an einem Halterungsglied (7) befestigt ist, das entlang des zugeordneten Trägerteils (4.1) in unterschiedlichen Höhenstellungen feststellbar ist.24. Backrest according to claim 23, characterized in that each back support (3) on a support member (7) is fixed, which along the associated support member (4.1) can be determined in different height positions.
25. Rückenlehne nach Anspruch 24, dadurch gekennzeichnet, dass jede Rückenstütze (3) unter Zwischenschaltung mindestens eines elastisch verformbaren Federungselementes an ihrem Halterungsglied (7) befestigt ist.25. A backrest according to claim 24, characterized in that each back support (3) with the interposition of at least one elastically deformable suspension element is attached to its support member (7).
26. Rückenlehne nach Anspruch 24, dadurch gekennzeichnet, dass an jedem Halterungsglied (7) ein gegen Federkraft um eine Horizontalachse (12) verschwenkbarer Körper (10) befestigt, der seinerseits gegen Federkraft um eine Vertikalachse (14) verschwenkbar an einer Rückenstütze (3) befestigt ist.26. A backrest according to claim 24, characterized in that attached to each support member (7) against spring force about a horizontal axis (12) pivotable body (10) which in turn against spring force about a vertical axis (14) pivotally mounted on a back support (3). is attached.
27. Rückenlehne nach einem der Ansprüche 20 bis 26, dadurch gekennzeichnet, dass die beiden Rückenstützen (3) mittels eines elastisch verformbaren Quersteges (3.2) miteinander verbunden sind, dessen Festigkeit so ausgelegt ist, dass die beiden Rückenstützen (3) ihre Funktion als Einzelstützen behalten, und die Beweglichkeit der einen Rückenstütze relativ zu der anderen Rückenstütze in eingeschränktem Umfang erhalten bleibt.27. Backrest according to one of claims 20 to 26, characterized in that the two backrests (3) by means of an elastically deformable transverse web (3.2) are interconnected, whose strength is designed so that the two backrests (3) their function as individual supports retain the mobility of a back support relative to the other back support to a limited extent.
28. Sitzmöbel in Form eines Stuhls, Sessels, oder dergleichen, das mit einer Rückenlehne (3) gemäß einem der Ansprüche 20 bis 27 ausgerüstet ist, dessen Sitzfläche mittels einer Trageinheit (2) an einem Ständer (1) befestigt ist, dadurch gekennzeichnet, dass der um die horizontale Schwenkachse verschwenkbar befestigbare zweite Schenkel (4.2) jedes Trägers (4) als zweiarmiger Hebel ausgebildet ist, auf dessen freies Hebelende (4.3 bzw. 4.4) die Federkraft einwirkt.Seating furniture in the form of a chair, armchair, or the like, equipped with a backrest (3) according to one of claims 20 to 27, the seat surface of which is fastened to a stand (1) by means of a support unit (2), characterized in that the second limb (4.2) of each carrier (4), which can be fastened so as to be pivotable about the horizontal pivot axis, is designed as a two-armed lever, onto whose free lever end (4.3 or 4.4) the spring force acts.
29. Sitzmöbel nach Anspruch 28, dadurch gekennzeichnet, dass die Federkraft durch ein im wesentlichen vertikal ausgerichtetes Federelement (22) bewirkt wird.29. Seating furniture according to claim 28, characterized in that the spring force is effected by a substantially vertically aligned spring element (22).
30. Sitzmöbel nach Anspruch 28, dadurch gekennzeichnet, dass der zweite Schenkel (4.2) im Bereich seines freien Hebelendes eine nach oben oder unten gerichtete Abkröpfung (4.4) aufweist, an der ein im wesentlichen horizontal ausgerichtetes Federelement (22) einwirkt.30. Seating furniture according to claim 28, characterized in that the second leg (4.2) in the region of its free end of the lever, an upwardly or downwardly directed bend (4.4) has, acts on a substantially horizontally oriented spring element (22).
31. Sitzmöbel nach Anspruch 28, dadurch gekennzeichnet, dass die Abkröpfüng (4.4) nach oben gerichtet ist und das Federelement als Zugfeder (22) ausgebildet ist, und dass die Zugfedern (22) beider Träger zur Veränderung der auf die Träger einwirkenden Kraft mit ihren Enden an einem relativ zur Horizontalachse in unterschiedlichen Abständen feststellbaren Verstellglied (23) befestigt sind. 31. Seating furniture according to claim 28, characterized in that the Abkröpfüng (4.4) is directed upward and the spring element as a tension spring (22) is formed, and that the tension springs (22) of both carriers to change the force acting on the carrier force with their Ends are fixed to a relative to the horizontal axis at different distances detectable adjusting member (23).
EP07722472A 2006-06-29 2007-05-26 Back rest for a seat of a stool or a chair, and seating furiniture provided with such a back rest Not-in-force EP2040582B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006030018A DE102006030018A1 (en) 2006-06-29 2006-06-29 Backrest for a chair or armchair and chair or armchair equipped with such a backrest
PCT/DE2007/000954 WO2008000207A1 (en) 2006-06-29 2007-05-26 Back rest for a stool or a chair, and stool or chair provided with such a back rest
DE202007007524U DE202007007524U1 (en) 2006-06-29 2007-05-26 Backrest for a chair or armchair and chair or armchair equipped with such a backrest

Publications (2)

Publication Number Publication Date
EP2040582A1 true EP2040582A1 (en) 2009-04-01
EP2040582B1 EP2040582B1 (en) 2011-07-20

Family

ID=41078738

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07722472A Not-in-force EP2040582B1 (en) 2006-06-29 2007-05-26 Back rest for a seat of a stool or a chair, and seating furiniture provided with such a back rest

Country Status (12)

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US (1) US20100301652A1 (en)
EP (1) EP2040582B1 (en)
JP (1) JP2009540970A (en)
KR (1) KR20090034352A (en)
CN (1) CN101478895B (en)
AT (1) ATE516726T1 (en)
AU (1) AU2007264236A1 (en)
CA (2) CA2724761A1 (en)
DE (2) DE102006030018A1 (en)
ES (1) ES2367869T3 (en)
RU (1) RU2009102813A (en)
WO (1) WO2008000207A1 (en)

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Also Published As

Publication number Publication date
CN101478895A (en) 2009-07-08
AU2007264236A1 (en) 2008-01-03
JP2009540970A (en) 2009-11-26
CA2653912A1 (en) 2008-01-03
KR20090034352A (en) 2009-04-07
DE202007007524U1 (en) 2008-10-09
ATE516726T1 (en) 2011-08-15
RU2009102813A (en) 2010-08-10
ES2367869T3 (en) 2011-11-10
CN101478895B (en) 2012-04-04
CA2724761A1 (en) 2008-01-03
DE102006030018A1 (en) 2008-01-03
EP2040582B1 (en) 2011-07-20
WO2008000207A1 (en) 2008-01-03
US20100301652A1 (en) 2010-12-02

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