EP2298132A1 - Seat mechanism for seating furniture, in particular rotating office chair - Google Patents

Seat mechanism for seating furniture, in particular rotating office chair Download PDF

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Publication number
EP2298132A1
EP2298132A1 EP09011822A EP09011822A EP2298132A1 EP 2298132 A1 EP2298132 A1 EP 2298132A1 EP 09011822 A EP09011822 A EP 09011822A EP 09011822 A EP09011822 A EP 09011822A EP 2298132 A1 EP2298132 A1 EP 2298132A1
Authority
EP
European Patent Office
Prior art keywords
seat
support
mechanism according
seat mechanism
backrest
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
EP09011822A
Other languages
German (de)
French (fr)
Other versions
EP2298132B1 (en
Inventor
Werner Härtel
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.)
Haworth GmbH
Original Assignee
Haworth 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 Haworth GmbH filed Critical Haworth GmbH
Priority to EP09011822.5A priority Critical patent/EP2298132B1/en
Priority to ES09011822T priority patent/ES2363706T1/en
Priority to US12/878,608 priority patent/US20110062759A1/en
Priority to CA2714758A priority patent/CA2714758A1/en
Priority to RU2010138230/12A priority patent/RU2010138230A/en
Publication of EP2298132A1 publication Critical patent/EP2298132A1/en
Application granted granted Critical
Publication of EP2298132B1 publication Critical patent/EP2298132B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A47C1/032—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
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/023—Reclining or easy chairs having independently-adjustable supporting parts the parts being horizontally-adjustable seats ; Expandable seats or the like, e.g. seats with horizontally adjustable 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
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • 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
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
    • 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
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
    • A47C1/03274—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs of torsion type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/029—Seat parts of non-adjustable shape adapted to a user contour or ergonomic seating positions
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs

Definitions

  • the invention relates to a seat mechanism, in particular for a chair, according to the preamble of patent claim 1.
  • Such a seat mechanism is for example from the DE 198 23 632 C1 known.
  • an energy accumulator in the form of a tension spring is formed, which is biased under load of the seat, so that this bias is dependent on the weight of the seated person. Since the backrest and thus the backrest is tilted against the action of the energy storage, thus the restoring force for the backrest is also dependent on the weight.
  • the weight force is not effectively utilized in the known device, since in this device, the load of the force accumulator takes place over the front region of the seat, that is, the thigh area of the seated person.
  • the present invention seeks to provide a seat mechanism with weight-dependent restoring force for the backrest, which is characterized by a simple structure and with which the weight can be used efficiently.
  • the invention deviating from the known principle of biasing the energy storage by the weight of the seated person, and it is proposed in contrast, implement a tilting movement of the backrest and thus the backrest support in a lifting movement for the seat.
  • a tilting movement of the backrest and thus the backrest support in a lifting movement for the seat.
  • the implementation can be done for example via a lever mechanism or via a slotted guide of the seat or the seat support.
  • a space-saving design results in particular by using coil springs as energy storage.
  • Dynamic sitting can be assisted if the seat is flexible and has a bridge in the middle area.
  • the rear portion of the seat is designed to be lowered.
  • a flexible seat cushion support may have in the side region slots extending from the edges towards the center, the slots are preferably arranged in the middle to rear portion of the seat cushion support and the length of the slots preferably with growing distance from the rear edge of the seat cushion support is smaller.
  • the flexibility of the seat cushion support can be increased by, for example perforations are provided in the region of the ischial tuberosity, wherein the perforations are formed by slots which are parallel to the trailing edge of the seat cushion support, and / or slits which extend parallel to the side edges.
  • the purely weight-dependent restoring force can be perceived as too large / small. Therefore, according to the invention, the use of a second force accumulator is proposed, which supports / obstructs the lifting movement if necessary, so that the restoring force is reduced / increased.
  • the second energy storage is preferably adjustable.
  • the energy store is pivotally mounted and can be biased at a pivoting or during a movement of the backrest.
  • tension springs for example, tension springs, compression springs, gas pressure elements, torsion springs, torsion springs, etc.
  • FIG. 4 shows a side view of a seat mechanism with a seat support 1 on which a seat (not shown) is mounted, with a panel 10, wherein on the seat support 1, a backrest support 3 is pivotally mounted via a coupling shaft 7.
  • the backrest support 3 carries a backrest, not shown, in the representation of the FIG. 4 the seat mechanism is in the normal position, that is the upright backrest.
  • FIG. 1 is an exploded perspective view and shows in addition to the backrest support 3 and the seat support 1, a main carrier 9 and a front link and a central link 17th
  • the main carrier 9 carries the entire seat mechanism and is connected via a bore 11 in a conventional manner with a chair column.
  • the seat carrier 1 is connected via the front link 15 with the main carrier 9, via bearing bores 19 which are aligned with bearing bores 21 on the main carrier, and bearing bores 23 which are aligned with corresponding bearings (not shown) on the seat support. Furthermore, in the assembled state, the backrest support 3 is pivotally mounted on the main support 9, via bearing bores 25 which are aligned with bearing bores 27 on the main support, these bearing bores having a main axis 13 (cf. FIG. 4 ) define.
  • the backrest support 3 is attached via bearing eyes 26 to corresponding bearings on the seat support, so that the backrest support is pivotable with respect to the seat support.
  • the bearing lugs 26 are offset from the bearing bores 25, so that the backrest support 3 itself forms a rear link.
  • FIG. 2 shows the seat support 1 and the backrest support 3 in the assembled state. Also shown are coil springs 33, which are mounted in the backrest support 3 and whose legs are supported in an abutment 35 of the backrest support 3, wherein the legs at the other end of the coil springs are supported on the main carrier (not shown).
  • spring assemblies 37 are pivotally received, wherein the spring assemblies on the one hand act on a displaceable axis 39, on the other hand on an abutment 43 of the main carrier 9 (FIG. FIG. 6 ).
  • the displaceable axis 39 is mounted on both sides on cam tracks 47 and can be moved via an actuating lever 41 on the curved path.
  • the cam track 47 has different distances in the course of the abutment 43, so that the spring assemblies 37 are loaded differently in different positions, for example, in three positions, that is, a first position without load, a second position with medium load and a third position with high Burden.
  • the spring assemblies act as tension springs, and under load tensile forces between the seat support and the main carrier act.
  • the inner structure of the spring assemblies 37 are designed so that spring elements are designed in the form of compression springs, since in this design, a higher load capacity and a longer service life can be achieved.
  • FIG. 4 shows FIG. 4 the seat mechanism in the normal state, ie with upright backrest.
  • FIG. 6 shows FIG. 6 the position of the seat mechanism with a maximum backward inclined back
  • the seat support 1 opposite FIG. 4 is raised in parallel, in the rear area on the rear link, as is apparent from the position of the axles 13 and 7, and in the front area on the front link 15, as is apparent from its position.
  • the coil springs 35 are loaded and cause a restoring force on the backrest support 3, which is additionally reinforced via the front and the rear handlebars by the force acting on the seat weight, which, as mentioned, via the spring assemblies 37, the restoring force can be changed.
  • the front arm 15 is mounted on the seat support in slots 49.
  • the position of the handlebar 15 is locked in the slots 49 in the lower position of the elongated holes.
  • This lock can be canceled, and the seat support can be tilted forward be like in FIG. 3 is shown.
  • This seating position is particularly suitable for work on computer screens, etc. Since this position of the seat support is unfavorable when the backrest is tilted back, according to the invention, the seat support is forcibly moved to the horizontal position when the backrest support is pivoted.
  • levers 51 are provided, which on the one hand act on the main carrier 9, on the other hand on the seat carrier 1, and which cause forcibly that the front edge of the seat carrier is raised.
  • the front link can be locked in the lower region of the slots 49.
  • the middle handlebar 17 each have a lever 51.
  • the middle handlebar 17 is mounted in fastening tabs 31 which are fixed to the seat support.
  • the levers 51 each carry at the end facing away from the attachment tabs 31 bearing journals 29, which are mounted in the main carrier.
  • the seat mechanism shown here is particularly suitable for office swivel chairs, but can also be used in other seating such as 4-leg chairs, armchairs, sofas and the like.
  • an seat chair includes the seat mechanism described, a seat 61 with a seat cushion support 65 and a seat cushion 63 and a back frame 67.
  • the seat 61 is slidably mounted on the seat support 1 to the front or rear, wherein the back frame 67 on the backrest support with the main support connected to a chair column 73 is connected.
  • a backrest frame 77 is pivotally mounted, which is connected at its lower end to the trailing edge of the seat 61. Further, a lumbar support 75 is provided which is attached to a lumbar support of a cross member 81 and a longitudinal member 83.
  • FIG. 9 shows the frame construction of the chair without seat cushion. From this representation it can be seen that the cross member 81 extends between two bars of the back frame 67. In the middle of the cross member 81 of the longitudinal member 83 is fixed, which is transverse to a Holm the backrest frame 77 extends. Furthermore, the longitudinal member 89 has a telescopic connection 85.
  • the back frame 77 is in turn connected via a hinge connection 89 of lamellae with the back frame 77.
  • FIG. 9 shows that the seat cushion support 65 is formed as a plate which is made of flexible material and in the middle has a front to rear extending web 91.
  • the web 91 rests on the seat support 1 ( FIG. 7 ), but may also be connected to this and to the seat mechanism 79. By resting and flexibility dynamic seating is promoted with changing right / left load.
  • the seat cushion support is provided with slots 95 which extend parallel to the side edges of the seat cushion support, and with slots 97 extending parallel to its trailing edge to further increase flexibility.
  • FIG. 8 shows the seat cushion support 65 in a middle position.
  • the backrest support is provided with a covering, padding or the like.
  • the seat cushion support 65 is attached to lateral guides 105 (FIG. FIG. 1 ) Slidably mounted on the seat mechanism, wherein in the normal position, that is, with not inclined backrest, the web 91 rests on the seat mechanism 79.
  • the seat cushion support 65 is formed not as a flat plate but as a curved plate, in particular, the side portions of the seat cushion support 65 are curved in the normal position upwards.
  • the land 91 rises from the surface of the seat mechanism 79, and the cambers are pressed down depending on the body weight of the seated person and thus balanced. This is assisted by the arrangement of the slots 99 and their shaping, so that the compensation takes place in particular in the rear region of the seat and thus the seat is lowered, in particular in the rear area, whereby the seat comfort is increased when leaning back.

Abstract

The seat mechanism has a movable seat carrier (1) and a backrest carrier (3) that are mounted on a main carrier (9). The backrest carrier is pivoted about a horizontal pivot axis counter to an action of a force accumulator. The seat carrier and the backrest carrier are coupled together such that a lifting mechanism converts pivoting of the backrest carrier into a lifting movement of the seat carrier. The lifting mechanism comprises levers (51), which connect the seat carrier with the main carrier. A flexible seat cushion carrier is provided with a web in a central region.

Description

Die Erfindung betrifft eine Sitzmechanik, insbesondere für einen Stuhl, gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a seat mechanism, in particular for a chair, according to the preamble of patent claim 1.

Eine derartige Sitzmechanik ist beispielsweise aus der DE 198 23 632 C1 bekannt. Bei diesem bekannten Stuhl ist ein Kraftspeicher in Form einer Zugfeder ausgebildet, die bei Belastung des Sitzes vorgespannt wird, so dass diese Vorspannung abhängig vom Gewicht der sitzenden Person ist. Da der Lehnenträger und somit die Lehne gegen die Wirkung des Kraftspeichers geneigt wird, ist somit die Rückstellkraft für die Lehne ebenfalls abhängig von dem Gewicht.Such a seat mechanism is for example from the DE 198 23 632 C1 known. In this known chair, an energy accumulator in the form of a tension spring is formed, which is biased under load of the seat, so that this bias is dependent on the weight of the seated person. Since the backrest and thus the backrest is tilted against the action of the energy storage, thus the restoring force for the backrest is also dependent on the weight.

Andererseits wird die Gewichtskraft bei der bekannten Vorrichtung nicht effektiv ausgenutzt, da bei dieser Vorrichtung die Belastung des Kraftspeichers über den vorderen Bereich des Sitzes erfolgt, das heißt des Oberschenkelbereichs der sitzenden Person.On the other hand, the weight force is not effectively utilized in the known device, since in this device, the load of the force accumulator takes place over the front region of the seat, that is, the thigh area of the seated person.

Demgegenüber liegt der Erfindung die Aufgabe zugrunde, eine Sitzmechanik mit gewichtsabhängiger Rückstellkraft für die Lehne anzugeben, die sich durch einen einfachen Aufbau auszeichnet und mit der die Gewichtskraft effizient genutzt werden kann.In contrast, the present invention seeks to provide a seat mechanism with weight-dependent restoring force for the backrest, which is characterized by a simple structure and with which the weight can be used efficiently.

Die Lösung dieser Aufgabe erfolgt durch die Merkmale des Patentanspruches 1; die abhängigen Ansprüche beziehen sich auf vorteilhafte Ausgestaltungen der Erfindung.The solution of this problem is achieved by the features of claim 1; the dependent claims relate to advantageous embodiments of the invention.

Erfindungsgemäß wird von dem bekannten Prinzip, den Kraftspeicher durch die Gewichtskraft der sitzenden Person vorzuspannen, abgewichen, und es wird demgegenüber vorgeschlagen, eine Neigungsbewegung der Lehne und damit des Lehnenträgers in eine Hubbewegung für den Sitz umzusetzen. Somit wird bei einer Neigung der Lehne der gesamte Sitz mit der darauf sitzenden Person angehoben, so dass die gesamte Gewichtskraft zur Aufbringung der Rückstellkraft für die Lehne ausgenutzt werden kann.According to the invention, deviating from the known principle of biasing the energy storage by the weight of the seated person, and it is proposed in contrast, implement a tilting movement of the backrest and thus the backrest support in a lifting movement for the seat. Thus, at a tilt the back of the entire seat raised with the person sitting on it, so that the entire weight can be used to apply the restoring force for the backrest.

Die Umsetzung kann dabei beispielsweise über einen Hebelmechanismus oder über eine Kulissenführung des Sitzes beziehungsweise des Sitzträgers erfolgen.The implementation can be done for example via a lever mechanism or via a slotted guide of the seat or the seat support.

Ein platzsparender Aufbau ergibt sich insbesondere durch Verwendung von Wendelfedern als Kraftspeicher.A space-saving design results in particular by using coil springs as energy storage.

Dynamisches Sitzen kann unterstützt werden, wenn der Sitz flexibel ausgebildet ist und einen Steg im mittleren Bereich aufweist.Dynamic sitting can be assisted if the seat is flexible and has a bridge in the middle area.

Vorzugsweise ist der hintere Bereich des Sitzes absenkbar ausgestaltet. Um die Absenkung im hinteren Bereich des Sitzes zu ermöglichen, kann ein flexibler Sitzpolsterträger im Seitenbereich Schlitze aufweisen, die von den Kanten in Richtung zur Mitte verlaufen, wobei die Schlitze vorzugsweise im mittleren bis hinteren Bereich des Sitzpolsterträgers angeordnet sind und die Länge der Schlitze vorzugsweise mit wachsendem Abstand zur Hinterkante des Sitzpolsterträgers kleiner wird.Preferably, the rear portion of the seat is designed to be lowered. In order to allow the lowering in the rear of the seat, a flexible seat cushion support may have in the side region slots extending from the edges towards the center, the slots are preferably arranged in the middle to rear portion of the seat cushion support and the length of the slots preferably with growing distance from the rear edge of the seat cushion support is smaller.

Die Flexibilität des Sitzpolsterträgers kann erhöht werden, indem beispielsweise im Bereich der Sitzbeinhöcker Perforationen vorgesehen sind, wobei die Perforationen durch Schlitze gebildet sind, die parallel zur Hinterkante des Sitzpolsterträgers verlaufen, und/oder Schlitze, die parallel zu den Seitenkanten verlaufen.The flexibility of the seat cushion support can be increased by, for example perforations are provided in the region of the ischial tuberosity, wherein the perforations are formed by slots which are parallel to the trailing edge of the seat cushion support, and / or slits which extend parallel to the side edges.

Insbesondere bei schweren/leichten Personen kann die rein Gewichtskraft abhängige Rückstellkraft als zu groß/klein empfunden werden. Erfindungsgemäß wird deshalb der Einsatz eines zweiten Kraftspeichers vorgeschlagen, der bei Bedarf die Hubbewegung unterstützt/behindert, so dass die Rückstellkraft verkleinert/vergrößert wird.Especially with heavy / light persons, the purely weight-dependent restoring force can be perceived as too large / small. Therefore, according to the invention, the use of a second force accumulator is proposed, which supports / obstructs the lifting movement if necessary, so that the restoring force is reduced / increased.

Dazu ist der zweite Kraftspeicher vorzugsweise einstellbar.For this purpose, the second energy storage is preferably adjustable.

In einer bevorzugten Ausführungsform ist der Kraftspeicher verschwenkbar gelagert und kann bei einer Verschwenkung oder bei einer Bewegung der Lehne vorgespannt werden.In a preferred embodiment, the energy store is pivotally mounted and can be biased at a pivoting or during a movement of the backrest.

Insbesondere bei Arbeiten an Computerbildschirmen wird es als angenehm empfunden, wenn der Sitz des Sitzmöbels nach vorne abgesenkt werden kann. Die Erfinder haben erkannt, dass beim Zurücklehnen in der geneigten Position des Sitzes ein unangenehmes Gefühl des "Herausrutschens" aus dem Sitz entstehen kann. Erfindungsgemäß wird deshalb vorgeschlagen, eine Rückstellvorrichtung vorzusehen, die bei einer Hubbewegung des Sitzträgers die Absenkung zwangsweise aufhebt, wobei die Rückstellvorrichtung vorzugsweise einen Hebelmechanismus aufweist.Especially when working on computer screens, it is perceived as pleasant when the seat of the chair can be lowered to the front. The inventors have recognized that when leaning back in the reclined position of the seat, an uncomfortable feeling of "slipping out" of the seat may result. According to the invention, therefore, it is proposed to provide a return device which forcibly removes the depression during a lifting movement of the seat carrier, the return device preferably having a lever mechanism.

Abhängig von der konkreten Ausgestaltung können als Kraftspeicher beispielsweise Zugfedern, Druckfedern, Gasdruckelemente, Torsionsfedern, Schenkelfedern etc. eingesetzt werden.Depending on the specific configuration can be used as energy storage, for example, tension springs, compression springs, gas pressure elements, torsion springs, torsion springs, etc.

Ein Ausführungsbeispiel der Erfindung wird anhand der beigefügten Zeichnungen erläutert. Dabei zeigen

Figur 1
eine Explosionsdarstellung der Grundelemente einer Sitzmechanik,
Figur 2
eine perspektivische Draufsicht auf die montierte Sitzmechanik,
Figuren 3-6
verschiedene Seiten- bzw. Seitenschnittdarstellungen,
Figur 7
ein Mittelschnitt des Bürodrehstuhls,
Figur 8
eine Seitendarstellung des Bürodrehstuhls ohne Sitzpolster,
Figur 9
eine Perspektivdarstellung des Rahmenaufbaus des Bürodrehstuhls und
Figur 10
eine Draufsicht auf die Rahmenkonstruktion.
An embodiment of the invention will be explained with reference to the accompanying drawings. Show
FIG. 1
an exploded view of the basic elements of a seat mechanism,
FIG. 2
a perspective top view of the mounted seat mechanism,
Figures 3-6
different side and side views,
FIG. 7
a middle section of the office swivel chair,
FIG. 8
a side view of the office swivel chair without seat pad,
FIG. 9
a perspective view of the frame structure of the office swivel chair and
FIG. 10
a plan view of the frame construction.

In dem vorstehenden Text ergeben sich die Definitionen von "vorne", "hinten", "oben" etc. aus der Normalposition des Stuhls.In the above text, the definitions of "front", "back", "top", etc. result from the normal position of the chair.

Figur 4 zeigt eine Seitendarstellung einer Sitzmechanik mit einem Sitzträger 1 auf dem ein Sitz (nicht dargestellt) montiert wird, mit einer Blende 10, wobei an dem Sitzträger 1 ein Lehnenträger 3 über eine Kupplungsachse 7 schwenkbar montiert ist. Der Lehnenträger 3 trägt eine nicht dargestellte Rückenlehne, wobei in der Darstellung der Figur 4 sich die Sitzmechanik in der Normalposition, das heißt der aufgerichteten Lehne befindet. FIG. 4 shows a side view of a seat mechanism with a seat support 1 on which a seat (not shown) is mounted, with a panel 10, wherein on the seat support 1, a backrest support 3 is pivotally mounted via a coupling shaft 7. The backrest support 3 carries a backrest, not shown, in the representation of the FIG. 4 the seat mechanism is in the normal position, that is the upright backrest.

Figur 1 ist eine perspektivische Explosionsdarstellung und zeigt zusätzlich zu dem Lehnenträger 3 und dem Sitzträger 1 einen Hauptträger 9 sowie einen vorderen Lenker und einen mittleren Lenker 17. FIG. 1 is an exploded perspective view and shows in addition to the backrest support 3 and the seat support 1, a main carrier 9 and a front link and a central link 17th

Der Hauptträger 9 trägt die gesamte Sitzmechanik und wird über eine Bohrung 11 in an sich bekannter Weise mit einer Stuhlsäule verbunden.The main carrier 9 carries the entire seat mechanism and is connected via a bore 11 in a conventional manner with a chair column.

In montiertem Zustand ist der Sitzträger 1 über den vorderen Lenker 15 mit dem Hauptträger 9 verbunden, und zwar über Lagerbohrungen 19, die mit Lagerbohrungen 21 am Hauptträger fluchten, und über Lagerbohrungen 23, die mit entsprechenden Lagern (nicht dargestellt) am Sitzträger fluchten. Des Weiteren ist im montierten Zustand der Lehnenträger 3 am Hauptträger 9 schwenkbar befestigt, und zwar über Lagerbohrungen 25, die mit Lagerbohrungen 27 am Hauptträger fluchten, wobei diese Lagerbohrungen eine Hauptachse 13 (vergleiche Figur 4) definieren.In the assembled state, the seat carrier 1 is connected via the front link 15 with the main carrier 9, via bearing bores 19 which are aligned with bearing bores 21 on the main carrier, and bearing bores 23 which are aligned with corresponding bearings (not shown) on the seat support. Furthermore, in the assembled state, the backrest support 3 is pivotally mounted on the main support 9, via bearing bores 25 which are aligned with bearing bores 27 on the main support, these bearing bores having a main axis 13 (cf. FIG. 4 ) define.

Des Weiteren ist der Lehnenträger 3 über Lageraugen 26 an entsprechenden Lagern am Sitzträger befestigt, so dass der Lehnenträger bezüglich des Sitzträgers schwenkbar ist. Die Lageraugen 26 sind gegen die Lagerbohrungen 25 versetzt angeordnet, so dass der Lehnenträger 3 selbst einen hinteren Lenker bildet.Furthermore, the backrest support 3 is attached via bearing eyes 26 to corresponding bearings on the seat support, so that the backrest support is pivotable with respect to the seat support. The bearing lugs 26 are offset from the bearing bores 25, so that the backrest support 3 itself forms a rear link.

Figur 2 zeigt den Sitzträger 1 und den Lehnenträger 3 in montiertem Zustand. Zusätzlich dargestellt sind Wendelfedern 33, die im Lehnenträger 3 gelagert sind und deren Schenkel sich in einem Widerlager 35 des Lehnenträgers 3 abstützen, wobei die Schenkel am anderen Ende der Wendelfedern sich am Hauptträger abstützen (nicht dargestellt). FIG. 2 shows the seat support 1 and the backrest support 3 in the assembled state. Also shown are coil springs 33, which are mounted in the backrest support 3 and whose legs are supported in an abutment 35 of the backrest support 3, wherein the legs at the other end of the coil springs are supported on the main carrier (not shown).

Im Sitzträger 1 sind Federpakete 37 verschwenkbar aufgenommen, wobei die Federpakete einerseits an einer verschiebbaren Achse 39 angreifen, andererseits an einem Widerlager 43 des Hauptträgers 9 (Figur 6). Die verschiebbare Achse 39 ist beiderseits auf Kurvenbahnen 47 gelagert und kann über einen Betätigungshebel 41 auf der Kurvenbahn verschoben werden. Die Kurvenbahn 47 hat im Verlauf unterschiedliche Abstände hinsichtlich des Widerlagers 43, so dass die Federpakete 37 in unterschiedlichen Stellungen unterschiedlich belastet sind, beispielsweise in drei Positionen, das heißt einer ersten Position ohne Belastung, einer zweiten Position mit mittlerer Belastung und einer dritten Position mit hoher Belastung. Hier wirken die Federpakete als Zugfedern, und unter Belastung wirken Zugkräfte zwischen dem Sitzträger und dem Hauptträger. Hierzu sei noch angemerkt, dass vom inneren Aufbau die Federpakete 37 so gestaltet sind, das Federelemente in Form von Druckfedern ausgebildet sind, da bei dieser Gestaltung eine höhere Belastbarkeit und eine höhere Standzeit erzielt werden können.In the seat support 1 spring assemblies 37 are pivotally received, wherein the spring assemblies on the one hand act on a displaceable axis 39, on the other hand on an abutment 43 of the main carrier 9 (FIG. FIG. 6 ). The displaceable axis 39 is mounted on both sides on cam tracks 47 and can be moved via an actuating lever 41 on the curved path. The cam track 47 has different distances in the course of the abutment 43, so that the spring assemblies 37 are loaded differently in different positions, for example, in three positions, that is, a first position without load, a second position with medium load and a third position with high Burden. Here, the spring assemblies act as tension springs, and under load tensile forces between the seat support and the main carrier act. It should be noted that the inner structure of the spring assemblies 37 are designed so that spring elements are designed in the form of compression springs, since in this design, a higher load capacity and a longer service life can be achieved.

Wie bereits erläutert, zeigt Figur 4 die Sitzmechanik im Normalzustand, das heißt mit aufgerichteter Lehne. Demgegenüber zeigt Figur 6 die Position der Sitzmechanik mit maximal nach hinten geneigter Lehne, wobei der Sitzträger 1 gegenüber Figur 4 parallel angehoben ist, und zwar im hinteren Bereich über den hinteren Lenker, wie sich aus der Position der Achsen 13 und 7 ergibt, und im vorderen Bereich über den vorderen Lenker 15, wie sich aus dessen Stellung ergibt. Dabei werden die Wendelfedern 35 belastet und bewirken eine Rückstellkraft auf den Lehnenträger 3, die zusätzlich über den vorderen und den hinteren Lenker durch die auf den Sitz wirkende Gewichtskraft verstärkt wird, wobei, wie erwähnt, über die Federpakete 37 die Rückstellkraft verändert werden kann.As already explained, shows FIG. 4 the seat mechanism in the normal state, ie with upright backrest. In contrast, shows FIG. 6 the position of the seat mechanism with a maximum backward inclined back, the seat support 1 opposite FIG. 4 is raised in parallel, in the rear area on the rear link, as is apparent from the position of the axles 13 and 7, and in the front area on the front link 15, as is apparent from its position. The coil springs 35 are loaded and cause a restoring force on the backrest support 3, which is additionally reinforced via the front and the rear handlebars by the force acting on the seat weight, which, as mentioned, via the spring assemblies 37, the restoring force can be changed.

Wie insbesondere aus der Figur 5 ersichtlich ist, die die gleiche Stellung der Sitzmechanik wie Figur 6 zeigt, ist der vordere Lenker 15 am Sitzträger in Langlöchern 49 gelagert. In der Normalposition gemäß Figur 4 und in Positionen, in denen der Sitzträger 1 angehoben ist, ist die Lage des Lenkers 15 in den Langlöchern 49 in der unteren Position der Langlöcher arretiert. In der Normalposition der Figur 4 kann diese Arretierung aufgehoben werden, und der Sitzträger kann nach vorne geneigt werden, wie in Figur 3 dargestellt ist. Diese Sitzposition ist besonders für Arbeiten an Computerbildschirmen etc. geeignet. Da diese Position des Sitzträger ungünstig ist, wenn die Lehne nach hinten geneigt wird, wird erfindungsgemäß der Sitzträger zwangsweise in die Horizontalposition verschoben, wenn der Lehnenträger verschwenkt wird. Dazu sind Hebel 51 vorgesehen, die einerseits am Hauptträger 9 angreifen, andererseits am Sitzträger 1, und die bewirken, dass zwangsweise die Vorderkante des Sitzträgers angehoben wird. Dabei kann der vordere Lenker im unteren Bereich der Langlöcher 49 arretiert werden.As in particular from the FIG. 5 It can be seen that the same position of the seat mechanism as FIG. 6 shows, the front arm 15 is mounted on the seat support in slots 49. In the normal position according to FIG. 4 and in positions in which the seat support 1 is raised, the position of the handlebar 15 is locked in the slots 49 in the lower position of the elongated holes. In the normal position of FIG. 4 This lock can be canceled, and the seat support can be tilted forward be like in FIG. 3 is shown. This seating position is particularly suitable for work on computer screens, etc. Since this position of the seat support is unfavorable when the backrest is tilted back, according to the invention, the seat support is forcibly moved to the horizontal position when the backrest support is pivoted. For this purpose, levers 51 are provided, which on the one hand act on the main carrier 9, on the other hand on the seat carrier 1, and which cause forcibly that the front edge of the seat carrier is raised. In this case, the front link can be locked in the lower region of the slots 49.

Wie insbesondere aus der Figur 1 ersichtlich ist, hat der mittlere Lenker 17 je einen Hebel 51. Der mittlere Lenker 17 ist in Befestigungslaschen 31 gelagert, die am Sitzträger befestigt sind. Die Hebel 51 tragen jeweils an dem den Befestigungslaschen 31 abgewandten Ende Lagerzapfen 29, die im Hauptträger gelagert sind.As in particular from the FIG. 1 can be seen, the middle handlebar 17 each have a lever 51. The middle handlebar 17 is mounted in fastening tabs 31 which are fixed to the seat support. The levers 51 each carry at the end facing away from the attachment tabs 31 bearing journals 29, which are mounted in the main carrier.

Die hier dargestellte Sitzmechanik ist insbesondere für Bürodrehstühle geeignet, kann aber auch bei anderen Sitzmöbeln wie 4-Beinstühlen, Sesseln, Sofas und dergleichen eingesetzt werden.The seat mechanism shown here is particularly suitable for office swivel chairs, but can also be used in other seating such as 4-leg chairs, armchairs, sofas and the like.

Gemäß Figur 7 umfasst ein Bürostuhl die beschriebene Sitzmechanik, einen Sitz 61 mit einem Sitzpolsterträger 65 und einem Sitzpolster 63 und einen Lehnenrahmen 67. Der Sitz 61 ist auf dem Sitzträger 1 nach vorn bzw. hinten verschiebbar gelagert, wobei der Lehnenrahmen 67 über den Lehnenträger mit dem Hauptträger 9 verbunden ist, der an einer Stuhlsäule 73 befestigt ist.According to FIG. 7 an seat chair includes the seat mechanism described, a seat 61 with a seat cushion support 65 and a seat cushion 63 and a back frame 67. The seat 61 is slidably mounted on the seat support 1 to the front or rear, wherein the back frame 67 on the backrest support with the main support connected to a chair column 73 is connected.

Am Lehnenrahmen 67 ist schwenkbar ein Lehnenunterrahmen 77 angebracht, der an seinem unteren Ende mit der Hinterkante des Sitzes 61 verbunden ist. Ferner ist eine Lordosestütze 75 vorgesehen, die an einem Lordosestützenträger aus einem Querträger 81 und einem Längsträger 83 angebracht ist.On the back frame 67, a backrest frame 77 is pivotally mounted, which is connected at its lower end to the trailing edge of the seat 61. Further, a lumbar support 75 is provided which is attached to a lumbar support of a cross member 81 and a longitudinal member 83.

Die Anordnung der letztgenannten Elemente ist insbesondere aus der perspektivischen Darstellung der Figur 9 ersichtlich, die die Rahmenkonstruktion des Stuhls ohne Sitzpolster zeigt. Aus dieser Darstellung ist ersichtlich, dass sich der Querträger 81 zwischen zwei Holmen des Lehnenrahmens 67 erstreckt. In der Mitte des Querträgers 81 ist der Längsträger 83 befestigt, der sich zu einem quer verlaufenden Holm des Lehnenunterrahmens 77 erstreckt. Des Weiteren weist der Längsträger 89 eine Teleskopverbindung 85 auf.The arrangement of the latter elements is in particular from the perspective view of FIG. 9 It can be seen that shows the frame construction of the chair without seat cushion. From this representation it can be seen that the cross member 81 extends between two bars of the back frame 67. In the middle of the cross member 81 of the longitudinal member 83 is fixed, which is transverse to a Holm the backrest frame 77 extends. Furthermore, the longitudinal member 89 has a telescopic connection 85.

Der Lehnenrahmen 77 ist seinerseits über eine Gelenkverbindung 89 aus Lamellen mit dem Lehnenrahmen 77 verbunden.The back frame 77 is in turn connected via a hinge connection 89 of lamellae with the back frame 77.

Figur 9 zeigt ferner, dass der Sitzpolsterträger 65 als eine Platte ausgebildet ist, die aus flexiblem Material gefertigt ist und in der Mitte einen von vorn nach hinten sich erstreckenden Steg 91 aufweist. Der Steg 91 liegt auf dem Sitzträger 1 auf (Figur 7), und kann aber auch mit diesem und mit der Sitzmechanik 79 verbunden sein. Durch das Aufliegen und die Flexibilität wird bei wechselnder Rechts-/Links-Belastung dynamisches Sitzen gefördert. FIG. 9 shows that the seat cushion support 65 is formed as a plate which is made of flexible material and in the middle has a front to rear extending web 91. The web 91 rests on the seat support 1 ( FIG. 7 ), but may also be connected to this and to the seat mechanism 79. By resting and flexibility dynamic seating is promoted with changing right / left load.

Im Bereich der Sitzbeinhöcker ist der Sitzpolsterträger mit Schlitzen 95 versehen, die sich parallel zu den Seitenkanten des Sitzpolsterträgers erstrecken, sowie mit Schlitzen 97, die sich parallel zu dessen Hinterkante erstrecken, um die Flexibilität weiter zu erhöhen.In the region of the ischial tuberosities, the seat cushion support is provided with slots 95 which extend parallel to the side edges of the seat cushion support, and with slots 97 extending parallel to its trailing edge to further increase flexibility.

Im Bereich der Seitenkanten ist der Sitzpolsterträger 65 mit Schlitzen 99 versehen, die sich von der Seitenkante in Richtung auf den Steg 91 erstrecken. Die Länge dieser Schlitze 99 nimmt zu, je näher sie an die Hinterkante des Sitzpolsterträgers 65 angeordnet sind.In the region of the side edges of the seat cushion support 65 is provided with slots 99 which extend from the side edge in the direction of the web 91. The length of these slots 99 increases the closer they are to the trailing edge of the seat cushion support 65.

Wie durch den Doppelpfeil in Figur 8 dargestellt ist, die den Stuhl ohne Sitzpolster zeigt, ist der Sitzpolsterträger 65 in Tiefenrichtung des Stuhls verschiebbar gelagert. Dabei folgt der Lehnenunterrahmen 77 einer Bewegung des Sitzpolsterträgers 65, so dass kein horizontaler Spalt entstehen kann. Figur 8 zeigt den Sitzpolsterträger 5 in einer mittleren Position.As indicated by the double arrow in FIG. 8 is shown, which shows the chair without seat cushion, the seat cushion support 65 is slidably mounted in the depth direction of the chair. In this case, the backrest subframe 77 follows a movement of the seat cushion support 65, so that no horizontal gap can arise. FIG. 8 shows the seat cushion carrier 5 in a middle position.

Hierzu sei noch angemerkt, dass im Gebrauchszustand des Stuhls der Lehnenträger mit einer Bespannung, Polsterung oder dergleichen versehen ist.It should be noted that in the state of use of the chair, the backrest support is provided with a covering, padding or the like.

Der Sitzpolsterträger 65 ist an seitlichen Führungen 105 (Figur 1) an der Sitzmechanik verschiebbar gelagert, wobei in der Normalposition, das heißt mit nicht geneigter Lehne, der Steg 91 auf der Sitzmechanik 79 aufliegt.The seat cushion support 65 is attached to lateral guides 105 (FIG. FIG. 1 ) Slidably mounted on the seat mechanism, wherein in the normal position, that is, with not inclined backrest, the web 91 rests on the seat mechanism 79.

Insbesondere aus Figur 9 ist ersichtlich, dass der Sitzpolsterträger 65 nicht als ebene Platte sondern als gewölbte Platte ausgebildet ist, wobei insbesondere die Seitenbereiche des Sitzpolsterträgers 65 in der Normalposition nach oben gewölbt sind. Wird der Sitzpolsterträger durch die Sitzmechanik 79 angehoben, hebt sich der Steg 91 von der Oberfläche der Sitzmechanik 79, und die Wölbungen werden abhängig vom Körpergewicht der sitzenden Person nach unten gedrückt und somit ausgeglichen. Dies wird durch die Anordnung der Schlitze 99 und deren Formgebung unterstützt, so dass der Ausgleich insbesondere im hinteren Bereich des Sitzes erfolgt und somit die Sitzfläche insbesondere im hinteren Bereich abgesenkt wird, wodurch der Sitzkomfort beim Zurücklehnen erhöht wird.In particular from FIG. 9 It can be seen that the seat cushion support 65 is formed not as a flat plate but as a curved plate, in particular, the side portions of the seat cushion support 65 are curved in the normal position upwards. When the seat cushion support is raised by the seat mechanism 79, the land 91 rises from the surface of the seat mechanism 79, and the cambers are pressed down depending on the body weight of the seated person and thus balanced. This is assisted by the arrangement of the slots 99 and their shaping, so that the compensation takes place in particular in the rear region of the seat and thus the seat is lowered, in particular in the rear area, whereby the seat comfort is increased when leaning back.

Claims (15)

Sitzmechanik für ein Sitzmöbel, insbesondere als Stuhl, mit einem bewegbaren Sitzträger (1) und einem Lehnenträger (3), die auf einem Hauptträger (9) montiert sind, wobei der Lehnenträger (3) gegen die Wirkung eines Kraftspeichers um eine horizontale Schwenkachse (13) verschwenkbar ist und Sitzträger (1) und Lehnenträger (3) miteinander gekoppelt sind, gekennzeichnet durch einen Hubmechanismus (15, 17), der eine Verschwenkung des Lehnenträgers (3) in eine Hubbewegung des Sitzträgers (1) umsetzt.A seat mechanism for a chair, in particular a chair, with a movable seat support (1) and a backrest support (3) mounted on a main support (9), the back support (3) being anti-impact of a force store about a horizontal pivot axis (13 ) is pivotable and seat support (1) and backrest support (3) are coupled together, characterized by a lifting mechanism (15, 17), which converts a pivoting of the backrest support (3) in a lifting movement of the seat support (1). Sitzmechanik nach Anspruch 1, dadurch gekennzeichnet, dass der Hubmechanismus Hebel aufweist, die den Sitzträger (1) mit dem Hauptträger (9) verbinden.Seat mechanism according to claim 1, characterized in that the lifting mechanism comprises levers which connect the seat support (1) with the main support (9). Sitzmechanik nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Kraftspeicher (33) mindestens eine Schenkelfeder aufweist, die einerseits am Lehnenträger (3) andererseits am Hauptträger (9) angreift.Seat mechanism according to claim 1 or 2, characterized in that the energy accumulator (33) has at least one leg spring which engages on the one hand on the backrest support (3) on the other hand on the main support (9). Sitzmechanik nach einem der Ansprüche 1 bis 3, wobei der Sitz (61) im hinteren Bereich absenkbar ist.Seat mechanism according to one of claims 1 to 3, wherein the seat (61) is lowered in the rear region. Sitzmechanik nach einem der Ansprüche 1 bis 4, wobei der Sitz (61) einen flexiblen Sitzpolsterträger (65) mit einem Steg (91) im mittleren Bereich aufweist.A seat mechanism according to any one of claims 1 to 4, wherein the seat (61) comprises a flexible seat cushion support (65) having a web (91) in the central area. Sitzmechanik nach Anspruch 5, wobei der Sitzpolsterträger im Seitenbereich Schlitze (39) aufweist, die von den Kanten in Richtung zur Mitte verlaufen.Seat mechanism according to claim 5, wherein the seat cushion support in the side region has slots (39) extending from the edges towards the center. Sitzmechanik nach Anspruch 6, wobei die Schlitze im mittleren bis hinteren Bereich des Sitzpolsterträgers angeordnet sind.Seat mechanism according to claim 6, wherein the slots are arranged in the middle to rear region of the seat cushion support. Sitzmechanik nach Anspruch 6 oder 7, wobei die Länge der Schlitze (99) mit wachsendem Abstand zur Hinterkante des Sitzpolsterträgers (65) kleiner wird.Seat mechanism according to claim 6 or 7, wherein the length of the slots (99) with increasing distance to the trailing edge of the seat cushion support (65) becomes smaller. Sitzmechanik nach einem der Ansprüche 1 bis 8, gekennzeichnet durch einen zweiten Kraftspeicher (37), der einerseits am Sitzträger (1), andererseits am Hauptträger (9) angreift.Seat mechanism according to one of claims 1 to 8, characterized by a second energy store (37), on the one hand on the seat support (1), on the other hand engages the main carrier (9). Sitzmechanik nach Anspruch 9, dadurch gekennzeichnet, dass die Wirkung des zweiten Kraftspeichers (37) einstellbar ist.Seat mechanism according to claim 9, characterized in that the action of the second energy accumulator (37) is adjustable. Sitzmechanik nach einem der Ansprüche 9 oder 10, dadurch gekennzeichnet, dass der zweite Kraftspeicher verschwenkbar angeordnet ist.Seat mechanism according to one of claims 9 or 10, characterized in that the second energy store is arranged pivotably. Sitzmechanik nach Anspruch 11, dadurch gekennzeichnet, dass der zweite Kraftspeicher einerseits in einer Schwenkachse, andererseits an einer Kurvenführung (47) gelagert ist.Seat mechanism according to claim 11, characterized in that the second energy store is mounted on the one hand in a pivot axis, on the other hand on a cam guide (47). Sitzmechanik nach einem der Ansprüche 1 bis 12, gekennzeichnet durch eine Neigungsvorrichtung zur Absenkung der Vorderkante eines auf den Sitzträger (1) montierten Sitzes (5) und eine Rückstellvorrichtung (51), die bei einer Hubbewegung des Sitzträgers (1) die Absenkung zwangsweise aufhebt.Seat mechanism according to one of claims 1 to 12, characterized by a tilting device for lowering the front edge of a mounted on the seat support (1) seat (5) and a return device (51), which forcibly lifts the lowering in a lifting movement of the seat support (1). Sitzmechanik nach Anspruch 13, dadurch gekennzeichnet, dass die Rückstellvorrichtung mindestens einen Hebel aufweist, der einerseits am Hauptträger (9), andererseits am Sitzträger angreift.Seat mechanism according to claim 13, characterized in that the restoring device comprises at least one lever which acts on the one hand on the main carrier (9), on the other hand on the seat carrier. Stuhl, insbesondere Bürodrehstuhl, mit einer Sitzmechanik nach einem der vorstehenden Ansprüche.Chair, in particular office swivel chair, with a seat mechanism according to one of the preceding claims.
EP09011822.5A 2009-09-16 2009-09-16 Seating furniture, in particular rotating office chair Active EP2298132B1 (en)

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EP09011822.5A EP2298132B1 (en) 2009-09-16 2009-09-16 Seating furniture, in particular rotating office chair
ES09011822T ES2363706T1 (en) 2009-09-16 2009-09-16 MECHANICAL SEAT UNIT FOR SEAT FURNITURE, IN PARTICULAR ROTATING CHAIR OF OFFICE.
US12/878,608 US20110062759A1 (en) 2009-09-16 2010-09-09 Seat Mechanism for an Item of Seating Furniture, in Particular Office Swivel Chair
CA2714758A CA2714758A1 (en) 2009-09-16 2010-09-13 Seat mechanism for an item of seating furniture, in particular office swivel chair
RU2010138230/12A RU2010138230A (en) 2009-09-16 2010-09-15 MECHANISM OF SEAT FOR FURNITURE FOR SEATING, IN PARTICULAR OFFICE OF THE TURNING CHAIR

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CA2714758A1 (en) 2011-03-16
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RU2010138230A (en) 2012-03-20
US20110062759A1 (en) 2011-03-17

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