EP0085670A1 - Chair. - Google Patents

Chair.

Info

Publication number
EP0085670A1
EP0085670A1 EP81902299A EP81902299A EP0085670A1 EP 0085670 A1 EP0085670 A1 EP 0085670A1 EP 81902299 A EP81902299 A EP 81902299A EP 81902299 A EP81902299 A EP 81902299A EP 0085670 A1 EP0085670 A1 EP 0085670A1
Authority
EP
European Patent Office
Prior art keywords
seat
backrest
chair
pivot axis
backrest plate
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
EP81902299A
Other languages
German (de)
French (fr)
Other versions
EP0085670B1 (en
Inventor
Hermann Locher
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.)
Giroflex Entwicklungs AG
Original Assignee
Giroflex Entwicklungs AG
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 Giroflex Entwicklungs AG filed Critical Giroflex Entwicklungs AG
Priority to AT81902299T priority Critical patent/ATE12168T1/en
Publication of EP0085670A1 publication Critical patent/EP0085670A1/en
Application granted granted Critical
Publication of EP0085670B1 publication Critical patent/EP0085670B1/en
Expired legal-status Critical Current

Links

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
    • A47C1/031—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
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • A47C1/03211—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by electric motors
    • 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
    • A47C1/03283—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with fluid springs

Definitions

  • the invention relates to a chair with a pivotable about a horizontal axis backwards in an inclined position and a seat back attached to this seat, which also pivots in an inclined position when pivoting the seat about an axis attached to it, but here as a result of the tilting mechanism that comes into action covers a larger swivel angle than that of the seat.
  • OMrl pivots, also downwards, while at the same time performing the pivoting movement. However, their movement curve is less steep, so that there is a relative movement between the back and the backrest.
  • the invention now aims to avoid this relative movement or at least to reduce it in such a way that it is no longer noticeable.
  • Such a chair of the type mentioned at the outset is characterized according to the invention in that the backrest, by means of an adjusting device attached to and connected to the chair, when it is pivoted together with the seat into the inclined position from an upper starting position relative to the seat into a lower end position relative thereto is movable.
  • FIG. 3 shows the same representation as in FIG. 1, but for the chair according to the invention
  • Fig. 4 is a same view as Fig. 2, but on the chair according to Fig. 3, and
  • Fig. 5 is a perspective view of the leadership of the movable backrest plate.
  • FIG. 1 shows a possible embodiment of such a known chair.
  • the standpipe of the chair is called.
  • This has a seat support 2 with tabs 3 (only one visible) which contain an axis of rotation 4 for the seat 5 formed from pins or the like.
  • Standpipe 1, seat support 2, tabs 3 and thus also the axis of rotation 4 are to be regarded as stationary for the following explanations; they are therefore also shown in this figure as if they formed a single part.
  • the seat 5 is the first of the movable parts in that it can be pivoted about the axis of rotation 4.
  • the solid line shows the seat in its normal position; the dashed line, marked 5 ', shows it in its tilted or inclined position, into which it can be brought by a leaning user.
  • the swivel angle between the starting position 5 and the inclined position 5 ' is denoted by t.
  • the seat has a pivot axis 6 at its rear end. A further movable part is attached to this, namely the backrest, which is denoted overall by 7, is pivotable. It continues below the pivot axis 6 in a guide part 8 consisting of two parallel supports (only one support visible in FIG. 1). This is rigidly connected to the backrest 7.
  • the seat 5 is not only pivotable about the axis of rotation 4, but also mounted in a longitudinally displaceable manner, as is shown by the following explanations.
  • the guide part 8 is namely pivotable about a pivot axis 9a attached to the rigid seat support 2, and since it is consequently stationary, it forms the center the pivoting movement of all movable parts, ie the seat 5, the backrest 7 and the guide part 8 together with the pivot axis 6. It follows from this, in particular when considering FIG. 1, that the seat not only pivots about the axis of rotation 4, but also swivels must move along the same, which is made possible by suitable means, usually through elongated holes.
  • a piston rod 10 of a cylinder-piston unit usually a gas spring 11 of a commercially available type, which must also be pivotably mounted due to the movement of the pivot axis 6, specifically at the upper end of the standpipe 1.
  • the pivot axis 6 also changes its position as mentioned; the new location is designated 6 '. Here, it travels a distance back ⁇ which is designated by a.
  • the guide part 8 also changes its position, since it carries the pivot axis 6. Its new layer 8 'forms an angle with the old layer 8 which is larger than the angle. Since the backrest 7 is rigidly connected to the guide part 8, it also changes its position to the same extent. It also swivels from 7 to 7 'by this angle, which is denoted by ⁇ . In this position, it points to a larger seat Angle on than in the starting position.
  • FIG. 2 shows schematically some structural details.
  • the seat 5 is shown partially broken away to show the organs underneath. It can be seen that the seat support 2 widens greatly at its front end, that is to say it is T-shaped, in order to carry one tab 3 each.
  • the axis of rotation 4 can consist of two short swivel shafts about which the seat 5 can swing.
  • the pivot axis 6, however, is continuous because of the bearing of the piston rod 10; it is attached to the underside of the seat 5 in a known and therefore not shown manner.
  • the guide part 8 consisting of the two mentioned supports, and the backrest 7 are rigidly connected to one another, these parts are shown as a single part.
  • the backrest 7 not only makes a circular swiveling movement, but also decreases by the distance a. If you consider a point on the backrest, for example the upper end E, it moves according to the arrows 12 to the position E *.
  • Fig. 3 the same parts as in Fig. 1 can initially be seen.
  • the backrest 7 has changed something, as will be explained.
  • the position of the gas spring 11 has also changed. It is now pivotally attached to the seat support 2.
  • an approximately L-shaped pair of transmission levers 13 (only one lever can be seen in FIG. 3) and a driver bow 14 have recently been added.
  • the pair of transmission levers 13 has three articulation points.
  • the pair of levers is articulated on the pivot axis 9 of the guide part 8 and on the piston rod 10 of the gas spring.
  • Another articulation point is designated by 15; this is the actual axis of rotation, which is fixedly attached to immovable seat carrier 2 and about which the pair of translation levers 13 rotates.
  • the last articulation point, 16, is located on the longer leg 13b of each lever and is formed by an axis with which the driver bow 14 is articulated on the pair of transmission levers 13. (Fig. 4).
  • the driver bow 14 a rigid, curved, elongated plate, is articulated at its other end to a backrest plate 70. Details can be found above all in FIG. 5, which will be explained below.
  • This backrest plate 70 is slidably mounted by means of sliders 71 on a guide consisting of two guide rails 72, which form a direct continuation of each support of the guide part 8. 5, the sliders 71 have a recess 73 into which a protruding
  • the rotary movement of the translation levers 13 has the consequence that, because of the unequal length of the two legs 13a, 13b of each lever, the ends of the legs 13b perform an incomparably larger, ie translated, movement.
  • the articulation point 16 thus executes a circular movement around the articulation point 15 as the center point and thereby travels a distance which is denoted by b in FIG. 3. It can immediately be seen that this distance b is considerably greater than the distance a (movement from 6 to 6 ', FIG. 1).
  • the driver sheet 14 is thus pulled downward more and therefore pulls the backrest plate 70 along the guide rails 72 below, even though they move down a distance.
  • the intended purpose has been achieved.
  • the embodiment shown here thus shows a mechanical adjustment device. It goes without saying that other adjusting devices, for example hydraulic or electrical, could also be used to bring about the same effect. It should also be pointed out that, especially when using such adjusting devices, a reverse relative movement between the backrest and seat can also take place, in that the latter is raised at the inclination while the backrest or the backrest plate merely inclines. By raising of the seat Relatiwer- same results also in this case, displacement between the seat and 'backrest wie. mecanic example shown.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Control Of El Displays (AREA)
  • Finger-Pressure Massage (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)

Abstract

A reclining chair is disclosed containing a conventional seat portion pivotable about a fixed pivot shaft or axle and a backrest containing a backrest plate displaceable upon guide rails. These guide rails are pivoted to a greater extent than the seat during the rearward reclining of the seat, due to the action of a guide element connected with a piston rod of a pneumatic spring arrangement. Due to the movement of the guide element there is rotated a transmission lever pair about a stationary pivot shaft, the transmission lever pair being connected with the guide element. A curved entrainment member, hingedly connected with this transmission lever pair, is connected with the backrest plate. Since a pivot shaft between the transmission lever pair and the curved entrainment member moves through an appreciably larger distance than the connection location between the seat and the guide element or the guide rails, the backrest plate is downwardly drawn along the guide rails. By virtue of this adjustment mechanism there is ensured that the backrest plate follows that course of movement which is performed by the back of the user during reclining of the chair.

Description

Stuhl chair
Die Erfindung betrifft einen Stuhl mit einem um eine horizontale Achse nach rückwärts in eine geneigte Lage schwenkbaren Sitz und einer an diesem Sitz angebrachten Rückenlehne, die bei der Schwenkung des Sitzes um eine an diesem angebrachte Achse ebenfalls in eine geneigte Lage schwenkt, hierbei aber infolge eines in Aktion tretenden Neigungsmechanismus einen grösseren Schwenk¬ winkel zurücklegt als derjenige des Sitzes.The invention relates to a chair with a pivotable about a horizontal axis backwards in an inclined position and a seat back attached to this seat, which also pivots in an inclined position when pivoting the seat about an axis attached to it, but here as a result of the tilting mechanism that comes into action covers a larger swivel angle than that of the seat.
Stühle, hauptsächlich Bürostühle, dieser Art sind seit einigerZeit bekannt. Sie bieten einen beachtlichen Sitzkomfort, da sie einerseits in der Ausgangs- oder Arbeitsstellung dank der praktisch senkrechten Rücken¬ lehne eine gute Stützung des Rückens des Benutzers er¬ geben, andererseits aber in der nach rückwärts geneigten Lage ein entspanntes Sitzen (sogenannte Relax-Stellung) ermöglichen.Chairs, mainly office chairs, of this type have been known for some time. They offer remarkable seating comfort, because on the one hand they provide good support for the back of the user in the starting or working position thanks to the practically vertical backrest, but on the other hand they allow relaxed sitting (so-called relax position) in the reclined position enable.
Diese Stühle weisen jedoch einen Nachteil auf. Wenn nämlich der Winkel zwischen dem Sitz und der Rücken¬ lehne sich wie erv/ähnt aufweitet, macht der Oberkörper des Benutzers nicht einfach eine Schwenkbewegung, sondern es findet eine aus verschiedenen Bewegungen überlagerte resultierende Bewegung statt. Das Ergebnis ist, dass der Rücken des Benutzers beim Zurückkippen der Lehne eine Bewegung ausführt, bei welcher jede einzelne Stelle des Rückens eine ziemlich steil nach unten abfallende Kurve durchläuft. Die Rückenlehne kann aber dieser Bewegung nicht folgen. Zwar bewegt sie sich, da sie am rückwärtigen Ende des Sitzes ange¬ bracht ist, und dieses Ende beim Kippen nach untenHowever, these chairs have a disadvantage. If the angle between the seat and the backrest widens as mentioned above, the upper body of the user does not simply make a swiveling movement, but rather a resulting movement superimposed from different movements takes place. The result is that when the back of the back is tilted, the user's back performs a movement in which every single point on the back runs through a fairly steep downward curve. However, the backrest cannot follow this movement. It does move, since it is attached to the rear end of the seat, and this end moves downward when it is tilted
OMrl schwenkt, ebenfalls nach unten, während sie gleich¬ zeitig die Schwenkbewegung ausführt. Ihre Bewegungs¬ kurve ist jedoch weniger steil, sodass eine Relativ¬ bewegung zwischen Rücken und Lehne auftritt.OMrl pivots, also downwards, while at the same time performing the pivoting movement. However, their movement curve is less steep, so that there is a relative movement between the back and the backrest.
Die Erfindung bezweckt nun, diese Relativbewegung zu vermeiden oder wenigstens derart zu reduzieren, dass sie nicht mehr bemerkbar ist.The invention now aims to avoid this relative movement or at least to reduce it in such a way that it is no longer noticeable.
Ein solcher Stuhl der eingangs erwähnten Art ist erfindungsgemäss dadurch gekennzeichnet, dass die Rückenlehne durch eine am Stuhl angebrachte und mit ihr verbundene Versteileinrichtung bei ihrer zusammen mit dem Sitz erfolgenden Schwenkung in die geneigte Lage von einer relativ zum Sitz oberen Ausgangsstellung in eine relativ dazu untere Endlage verschiebbar ist.Such a chair of the type mentioned at the outset is characterized according to the invention in that the backrest, by means of an adjusting device attached to and connected to the chair, when it is pivoted together with the seat into the inclined position from an upper starting position relative to the seat into a lower end position relative thereto is movable.
Die Erfindung wird anhand der beiliegenden Zeichnungen beispielsweise näher erläutert; es zeigen:The invention is explained in more detail, for example, with reference to the accompanying drawings; show it:
Fig. 1 eine schematische Darstellung eines Stuhles der bisher bekannten Art und seiner Wirkungs¬ weise,1 is a schematic representation of a chair of the previously known type and its mode of operation,
Fig. 2 eine Aufsicht auf diesen Stuhl, unter teil¬ weiser Wegbrechung des Sitzes,2 shows a top view of this chair, with the seat partially being broken away,
Fig. 3 die gleiche Darstellung wie in Fig. 1, aber für den erfindungsgemässen Stuhl,3 shows the same representation as in FIG. 1, but for the chair according to the invention,
Fig. 4 eine gleiche Ansicht wie Fig. 2, aber auf den Stuhl gemäss Fig. 3, undFig. 4 is a same view as Fig. 2, but on the chair according to Fig. 3, and
Fig. 5 eine perspektivische Darstellung der Führung der beweglichen Rückenlehnenplatte.Fig. 5 is a perspective view of the leadership of the movable backrest plate.
OMPI Um den Bewegungsablauf und die Wirkungsweise des Stuhles besser zu verstehen, soll vorerst anhand von Fig. 1 erläutert werden, wie ein Stuhl der bisher bekannten Art funktioniert. Die schematische Darstellung zeigt eine mögliche Ausführungsform eines solchen bekannten Stuhles. Mit 1 ist das Standrohr des Stuhles bezeichnet. Dieses weist einen Sitzträger 2 mit Laschen 3 (nur eine sichtbar) auf, die eine aus Stiften oder dergleichen gebildete Drehachse 4 für den Sitz 5 enthalten. Standrohr 1, Sitzträger 2, Laschen 3 und damit auch die Drehachse 4 sind für die folgenden Erläuterungen als stationär zu betrachten; sie sind daher in dieser Figur auch so dargestellt, als ob sie einen einzigen Teil bilden wür¬ den. Der Sitz 5 ist _der erste der beweglichen Teile, indem er um die Drehachse 4 schwenkbar ist. Die voll ausgezogene Linie zeigt den Sitz in seiner Normallage; die gestrichelte Linie, mit 5' markiert, zeigt ihn in seiner zurückgekippten oder geneigten Lage, in die er durch einen sich zurücklehnenden Benutzer gebracht werden kann. Der Schwenkwinkel zwischen der Ausgangs¬ lage 5 und der geneigten Lage 5' ist mit t bezeichnet. An seinem hinteren Ende weist der Sitz eine Schwenkachse 6 auf. An dieser ist ein weiterer beweglicher Teil, nämlich die gesamthaft mit 7 bezeichnete Rückenlehne schwenkbar angebracht. Sie setzt sich unterhalb der Schwenkachse 6 in einen aus zwei parallelen Trägern (in Fig. 1 nur ein Träger sichtbar) bestehenden Führungs- teil 8 fort. Dieser ist also mit der Rückenlehne 7 starr verbunden. Der Sitz 5 ist übrigens um die Drehachse 4 nicht nur schwenkbar, sondern auch längsverschieblich gelagert, wie anhand der folgenden Ausführungen gezeigt wird. Der Führungsteil 8 ist nämlich um eine am starren Sitzträger 2 angebrachteSchwenkachse 9a schwenkbar, und da diese demzufolge ortsfest ist, bildet sie das Zentrum der Schwenkbewegung aller beweglichen Teile, also des Sitzes 5, der Rückenlehne 7 und des Führungsteils 8 samt Schwenkachse 6. Es folgt daraus, insbesondere bei Betrachtung der Fig. 1, dass der Sitz um die Dreh¬ achse 4 nicht nur schwenkt, sondern sich auch entlang derselben verschieben muss, was durch geeignete Mittel, meistens durch Langlöcher, ermöglicht wird.OMPI In order to better understand the sequence of movements and the mode of operation of the chair, it should first be explained with reference to FIG. 1 how a chair of the previously known type functions. The schematic representation shows a possible embodiment of such a known chair. With 1 the standpipe of the chair is called. This has a seat support 2 with tabs 3 (only one visible) which contain an axis of rotation 4 for the seat 5 formed from pins or the like. Standpipe 1, seat support 2, tabs 3 and thus also the axis of rotation 4 are to be regarded as stationary for the following explanations; they are therefore also shown in this figure as if they formed a single part. The seat 5 is the first of the movable parts in that it can be pivoted about the axis of rotation 4. The solid line shows the seat in its normal position; the dashed line, marked 5 ', shows it in its tilted or inclined position, into which it can be brought by a leaning user. The swivel angle between the starting position 5 and the inclined position 5 'is denoted by t. The seat has a pivot axis 6 at its rear end. A further movable part is attached to this, namely the backrest, which is denoted overall by 7, is pivotable. It continues below the pivot axis 6 in a guide part 8 consisting of two parallel supports (only one support visible in FIG. 1). This is rigidly connected to the backrest 7. Incidentally, the seat 5 is not only pivotable about the axis of rotation 4, but also mounted in a longitudinally displaceable manner, as is shown by the following explanations. The guide part 8 is namely pivotable about a pivot axis 9a attached to the rigid seat support 2, and since it is consequently stationary, it forms the center the pivoting movement of all movable parts, ie the seat 5, the backrest 7 and the guide part 8 together with the pivot axis 6. It follows from this, in particular when considering FIG. 1, that the seat not only pivots about the axis of rotation 4, but also swivels must move along the same, which is made possible by suitable means, usually through elongated holes.
Ebenfalls an der Schwenkachse 6 angelenkt ist eine Kolbenstange 10 eines Zylinderkolbenaggregates, übli¬ cherweise einer Gasfeder 11 von handelsüblicher Bauart, die wegen der Bewegung der Schwenkachse 6 ebenfalls schwenkbar gelagert sein muss, und zwar am oberen Ende des Standrohres 1. Da der Abstand des Gasfederschwenk- punktes 11a von der Schwenkachse 6 geringer ist als der konstante Abstand der Schwenkachsen 9 und 6 voneinander und dieser Schwenkpunkt 11a zudem neben der Verbindungs¬ linie der beiden genannten Schwenkachsen liegt, verkürzt sich sein Abstand von der Schwenkachse 6 bei der Rück¬ wärtsbewegung bzw. bei der Lageänderung der letzteren; die Gasfeder 11 wird also komprimiert, wobei sie wie üblich in jeder Stellung ihres Kolbens blockierbar ist, und dadurch ergibt sich auch die federnde Wirkung beim Rückwärtslehnen.Also articulated on the pivot axis 6 is a piston rod 10 of a cylinder-piston unit, usually a gas spring 11 of a commercially available type, which must also be pivotably mounted due to the movement of the pivot axis 6, specifically at the upper end of the standpipe 1. Since the distance of the gas spring pivot - point 11a from the pivot axis 6 is less than the constant distance of the pivot axes 9 and 6 from each other and this pivot point 11a is also next to the connecting line of the two mentioned pivot axes, its distance from the pivot axis 6 shortens during the backward movement or when changing the location of the latter; the gas spring 11 is thus compressed, whereby it can be locked as usual in any position of its piston, and this also results in the resilient effect when leaning backward.
Schwenkt also bei dieser Rückwärtsbewegung der Sitz von 5 nach 5* , so ändert wie erwähnt die Schwenkachse 6 ihre Lage ebenfalls; die neue Lage ist mit 6' bezeichnet. Hierbei legt sie eine Strecke zurück} die mit a bezeichnet ist. Durch diese Bewegung ändert auch der Führungsteil 8 seine Lage, da er ja die Schv.'enkachse 6 trägt. Seine neue Lage 8' bildet mit der alten Lage 8 einen Winkel, welcher grösser als der Winkel« ist. Da die Rückenlehne 7 starr mit dem Führungsteil 8 verbunden ist, ändert auch sie ihre Lage im gleichen Ausmass. Auch sie schwenkt um diesen Winkel, der mit ß bezeichnet ist, von 7 nach 7' . Sie weist also in dieser Lage zum Sitz einen grösseren Winkel auf als in der Ausgangsstellung.If the seat swivels from 5 to 5 * during this backward movement, the pivot axis 6 also changes its position as mentioned; the new location is designated 6 '. Here, it travels a distance back} which is designated by a. As a result of this movement, the guide part 8 also changes its position, since it carries the pivot axis 6. Its new layer 8 'forms an angle with the old layer 8 which is larger than the angle. Since the backrest 7 is rigidly connected to the guide part 8, it also changes its position to the same extent. It also swivels from 7 to 7 'by this angle, which is denoted by β. In this position, it points to a larger seat Angle on than in the starting position.
Figur 2 zeigt schematisch einige konstruktive Einzel¬ heiten. Der Sitz 5 ist teilweise weggebrochen dar¬ gestellt, um die darunterliegenden Organe zu zeigen. Man erkennt, dass der Sitzträger 2 sich an seinem vorderen Ende stark verbreitert, also T-förmig ist, um je eine Lasche 3 zu tragen. Die Drehachse 4 kann wie dargestellt aus zwei kurzen Schwenkwellen bestehen, um welche der Sitz 5 schwingen kann. Die Schwenkachse 6 ist hingegen wegen der Lagerung der Kolbenstange 10 durchgehend; sie ist in bekannter und daher nicht näher dargestellter Weise an der Unterseite des Sitzes 5 befestigt. Um zu zeigen, dass der Führungsteil 8, bestehend aus den zwei erwähnten Trägern, und die Rücken¬ lehne 7 starr miteinander verbunden sind, sind diese Teile als ein einziger Teil dargestellt.Figure 2 shows schematically some structural details. The seat 5 is shown partially broken away to show the organs underneath. It can be seen that the seat support 2 widens greatly at its front end, that is to say it is T-shaped, in order to carry one tab 3 each. As shown, the axis of rotation 4 can consist of two short swivel shafts about which the seat 5 can swing. The pivot axis 6, however, is continuous because of the bearing of the piston rod 10; it is attached to the underside of the seat 5 in a known and therefore not shown manner. In order to show that the guide part 8, consisting of the two mentioned supports, and the backrest 7 are rigidly connected to one another, these parts are shown as a single part.
Anhand von Fig. 1 ist somit ersichtlich, dass die Lehne 7 nicht nur eine kreisförmige Schwenkbewegung macht, son¬ dern sich auch noch um die Distanz a absenkt. Betrachtet man einen Punkt der Lehne, beispielsweise das obere Ende E, so wandert dieser gemäss den eingetragenen Pfeilen 12 zur Stelle E* .It can thus be seen from FIG. 1 that the backrest 7 not only makes a circular swiveling movement, but also decreases by the distance a. If you consider a point on the backrest, for example the upper end E, it moves according to the arrows 12 to the position E *.
Nun lässt sich aber beweisen, dass der menschliche Rücken nicht dieselbe Bewegung macht. Vielmehr vollführt er eine Bewegung, bei welcher eine entsprechende Stelle, die bei¬ spielsweise auf dem genannten Punkt E aufliegt, beim Rückwärtsneigen des Stuhles zu einem Punkt E' ' wandert, der wesentlich tiefer liegt als der Punkt E1. Die Lehne 7 hat also, relativ zum Rücken betrachtet, eine Bewegung nach oben durchgeführt. Diese Relativverschiebung, die wegen ihrer Wirkung auf männliche Benutzer in der Fach¬ sprache als "Hemdauszieheffekt" bezeichnet wird, soll nun durch den erfindungsgemässen Stuhl vermieden werden. Dies wird anhand der Figuren 3 und 4 erläutert.Now it can be proven that the human back does not make the same movement. Rather, it executes a movement in which a corresponding point, which rests, for example, on said point E, moves to a point E ″ when the chair leans backwards, which point is substantially lower than point E 1 . The backrest 7, viewed relative to the back, has performed an upward movement. This relative shift, which is referred to in the technical language as "shirt pull-out effect" because of its effect on male users, is intended can now be avoided by the chair according to the invention. This is explained on the basis of FIGS. 3 and 4.
In Fig. 3 sind vorerst dieselben Teile wie in Fig. 1 erkennbar. Die Rückenlehne 7 hat etwas geändert, wie noch erläutert wird. Geändert hat auch die Lage der Gasfeder 11. Sie ist nun schwenkbar am Sitzträger 2 befestigt. Weggefallen ist die Anlenkung des Führungs¬ teils 8 am Sitzträger 2, also die Schvenkachse 9a; sie wird durch eine Schwenkachse 9 am Ende des Führungs¬ teils 8 ersetzt. Neu hinzugekommen sind hingegen ein annähernd L-förmiges Uebersetzungshebelpaar 13 (inFig.3 nur ein Hebel ersichtlich) und ein Mitnehmer¬ bogen 14. Das Uebersetzungshebelpaar 13 hat drei Anlen - stellen. Mit dem kurzen Schenkel 13a jedes der L-förmi- gen Hebel ist das Hebelpaar an der Schwenkachse 9 des Führungsteils 8 und an der Kolbenstange 10 der Gasfeder angelenkt. Eine weitere Anlenkstelle ist mit 15 bezeich¬ net; diese ist die eigentliche Drehachse, die ortsfest an unbeweglichen Sitzträger 2 angebracht ist und um welche das Uebersetzungshebelpaar 13 sich dreht. Die letzte Anlenkstelle, 16, befindet sich am längeren Schenkel 13b jedes Hebels und ist durch eine Achse ge¬ bildet, mit welcher der Mitnehmerbogen 14 am Uebersetzungs¬ hebelpaar 13 angelenkt ist. (Fig. 4) .In Fig. 3, the same parts as in Fig. 1 can initially be seen. The backrest 7 has changed something, as will be explained. The position of the gas spring 11 has also changed. It is now pivotally attached to the seat support 2. The articulation of the guide part 8 on the seat support 2, ie the pivot axis 9a; it is replaced by a pivot axis 9 at the end of the guide part 8. In contrast, an approximately L-shaped pair of transmission levers 13 (only one lever can be seen in FIG. 3) and a driver bow 14 have recently been added. The pair of transmission levers 13 has three articulation points. With the short leg 13a of each of the L-shaped levers, the pair of levers is articulated on the pivot axis 9 of the guide part 8 and on the piston rod 10 of the gas spring. Another articulation point is designated by 15; this is the actual axis of rotation, which is fixedly attached to immovable seat carrier 2 and about which the pair of translation levers 13 rotates. The last articulation point, 16, is located on the longer leg 13b of each lever and is formed by an axis with which the driver bow 14 is articulated on the pair of transmission levers 13. (Fig. 4).
__
Der Mitnehmerbogen 14, eine starre, gebogene längliche Platte, ist an seinem anderen Ende an einer- Rückenlehnen¬ platte 70 angelenkt. Einzelheiten sind vor allem der noch zu erläuternden Figur 5 zu entnehmen. Diese Rücken¬ lehnenplatte 70 ist mittels Gleitern 71 an einer aus zwei Führungsschienen 72, welche eine direkte Fortsetzung jedes Trägers des Führungsteils 8 bilden, bestehenden Führung gleitend gelagert. Gemäss Fig. 5 weisen die Gleiter 71 eine Vertiefung 73 auf, in welche eine vor-The driver bow 14, a rigid, curved, elongated plate, is articulated at its other end to a backrest plate 70. Details can be found above all in FIG. 5, which will be explained below. This backrest plate 70 is slidably mounted by means of sliders 71 on a guide consisting of two guide rails 72, which form a direct continuation of each support of the guide part 8. 5, the sliders 71 have a recess 73 into which a protruding
___o ?ι_ stehende Rippe 74 jeder Führungsschiene 72 angreift. Vor allem aus dieser Figur ist auch ersichtlich, dass der Mitnehmerbogen 14 über eine Schwenkachse 17 gelenkig mit der Rückenlehnenplatte 70 verbunden ist, wobei diese Schwenkachse durch zwei starr an der Platte angebrachte Laschen 75 hindurchführt.___o? ι_ standing rib 74 engages each guide rail 72. Above all, it can also be seen from this figure that the driver bow 14 is connected in an articulated manner to the backrest plate 70 via a pivot axis 17, this pivot axis passing through two tabs 75 rigidly attached to the plate.
Die Wirkungsweise soll nun anhand von Fig. 3 erläutert werden. Neigt sich der Sitz 5, so ändert der Führungs¬ teil 8 seine Lage nach 8' , wie schon erläutert. Weil nun aber das Uebersetzungshebelpaar 13 mit ihm über die Schwenkachse 9 verbunden ist, hat die Verlagerung dieser Schwenkachse 9 nach 9' eine Mitnahme jedes Schenkels 13a zur Folge. Wegen der ortsfesten Drehachse 15 verdreht sich somit das Hebelpaar 13 um dieselbe. Die Enden der Schenkel 13a vollführen daher eine Kreis¬ bewegung. Es ist deshalb notwendig, auch hier die Gasfeder gelenkig zu lagern. Die Schwenkbewegung der Gasfeder 11 ist aber, wie aus Fig. 3 ersichtlich, wegen der relativen Lage der Kolbenstange 10 zu den Schenkeln 13a sehr minim, sodass dies auf die Bewegung des Füh¬ rungsteils 8 praktisch ohne Einfluss bleibt.The mode of operation will now be explained with reference to FIG. 3. If the seat 5 tilts, the guide part 8 changes its position to 8 ', as already explained. However, because the pair of transmission levers 13 is now connected to it via the pivot axis 9, the displacement of this pivot axis 9 to 9 'results in entrainment of each leg 13a. Because of the fixed axis of rotation 15, the pair of levers 13 thus rotates about the same. The ends of the legs 13a therefore perform a circular movement. It is therefore necessary to also articulate the gas spring. 3, the pivoting movement of the gas spring 11 is very minimal due to the relative position of the piston rod 10 to the legs 13a, so that this has practically no influence on the movement of the guide part 8.
Die Drehbewegung der Uebersetzungshebel 13 hat nun aber zur Folge, dass wegen der ungleichen Länge der beiden Schenkel 13a,13b jedes Hebels die Enden der Schenkel 13b eine ungleich grössere, also übersetzte Bewegung aus¬ führen. Damit vollführt die Anlenkstelle 16 eine kreis¬ förmige Bewegung um die Anlenkstelle 15 als Mittelpunkt und legt hierbei eine Distanz zurück, die in Fig. 3 mit b bezeichnet ist. Man ersieht sofort, dass diese Distanz b erheblich grösser als die Distanz a (Bewegung von 6 nach 6', Fig. 1) ist. Der Mitnehmerbogen 14 wird also stärker nach unten gezogen und zieht daher die Rücken¬ lehnenplatte 70 entlang den Führungsschienen 72 nach unten, obwohl sich diese selber um die Distanz a nach unten bewegen. Damit ist der angestrebte Zweck erreicht. Betrachtet man wieder den Punkt E auf der Rückenlehnen¬ platte, so wandert dieser im Verlauf der Neigung nach E'1, also zu dem Punkt, an welchem wie früher erwähnt auch die betreffende Stelle des Rückens des Benutzers gelangt ist. Die Relativverschiebung zwischen Lehne und Rücken fällt damit weg, was sich in einer deutlich spürbaren Komfortverbesserung bemerkbar macht. Das Aus- mass dieser Bewegung der Rückenlehnenplatte 70 wird durch die Geometrie des Verstellmechanismus, insbeson¬ dere durch die eniσe des Uebersetzungshebelpaares 13, bestimmt.However, the rotary movement of the translation levers 13 has the consequence that, because of the unequal length of the two legs 13a, 13b of each lever, the ends of the legs 13b perform an incomparably larger, ie translated, movement. The articulation point 16 thus executes a circular movement around the articulation point 15 as the center point and thereby travels a distance which is denoted by b in FIG. 3. It can immediately be seen that this distance b is considerably greater than the distance a (movement from 6 to 6 ', FIG. 1). The driver sheet 14 is thus pulled downward more and therefore pulls the backrest plate 70 along the guide rails 72 below, even though they move down a distance. The intended purpose has been achieved. If the point E on the backrest plate is considered again, it moves in the course of the inclination towards E ' 1 , that is to say to the point at which, as mentioned earlier, the relevant point on the back of the user has also reached. The relative displacement between the backrest and the back is eliminated, which is reflected in a clearly noticeable improvement in comfort. The extent of this movement of the backrest plate 70 is determined by the geometry of the adjustment mechanism, in particular by the eniσe of the translation lever pair 13.
Das hier dargestellte Ausführungsbeispiel zeigt also eine mechanische VerStelleinrichtung. Es versteht sich von selber, dass auch andere Versteileinrichtungen, z.B. hydraulische oder elektrische, zur Herbeiführung dessel¬ ben Effektes in Frage kommen könnten. Ebenso ist darauf hinzuweisen, dass vor allem bei Verwendung solcher VerStelleinrichtungen auch eine umgekehrte Relativ¬ bewegung zwischen Rückenlehne und Sitz stattfinden kann, indem nämlich der letztere bei der Neigung angehoben wird, während sich die Rückenlehne bzw. die Rückenlehnen¬ platte lediglich neigt. Durch das Anheben des Sitzes ergibt sich auch in diesem Falle dieselbe Relatiwer- schiebung zwischen Sitz und'Rückenlehne wie.beim dargestellten Beispiel. The embodiment shown here thus shows a mechanical adjustment device. It goes without saying that other adjusting devices, for example hydraulic or electrical, could also be used to bring about the same effect. It should also be pointed out that, especially when using such adjusting devices, a reverse relative movement between the backrest and seat can also take place, in that the latter is raised at the inclination while the backrest or the backrest plate merely inclines. By raising of the seat Relatiwer- same results also in this case, displacement between the seat and 'backrest wie.beim example shown.

Claims

Patentansprüche Claims
1. Stuhl mit einem um eine horizontale Achse (4) nach rückwärts in eine geneigte Lage schwenkbaren Sitz (5) und einer an diesem Sitz angebrachten Rücken¬ lehne (7), die bei der Schwenkung des Sitzes (5) um eine an diesem angebrachte Achse (6) ebenfalls , in eine geneigte Lage (7' ) schwenkt, hierbei aber infolge eines in Aktion tretenden Neigungsmechanis- us (8,9,10) einen grösseren Schwenkwinkel ( ß ) zurücklegt als derjenige (c ) des Sitzes, dadurch gekennzeichnet, dass die Rückenlehne (7) durch eine am Stuhl angebrachte und mit ihr (7) verbundene Verstelleinrichtung (13,14) bei ihrer zusammen mit dem Sitz (5) erfolgenden Schwenkung in die geneigte Lage von einer relativ zum Sitz oberen Ausgangs¬ stellung (E) in eine relativ dazu untere Endlage (E'') verschiebbar ist.1. A chair with a seat (5) which can be pivoted backwards about a horizontal axis (4) backwards into an inclined position and a backrest (7) attached to this seat which, when the seat (5) is pivoted, is attached to it Axle (6) also pivots into an inclined position (7 '), but in this case moves a larger swivel angle (β) than that (c) of the seat as a result of an inclination mechanism (8,9,10) taking action, characterized that the backrest (7) is adjusted by an adjustment device (13, 14) attached to the chair and connected to it (7) when it is swiveled together with the seat (5) into the inclined position from an initial starting position relative to the seat ( E) can be moved into a lower end position (E '') relative to it.
2. Stuhl nach Anspruch 1, dadurch gekennzeichnet, dass die Rückenlehne (7) eine im wesentlichen in ihrer Ebene verschiebbare Rückenlehnenplatte (70) und eine Führung (72) für dieselbe aufweist, und dass die Versteileinrichtung ein Verstellmechanismus ist, der an dieser Rückenlehnenplatte angreift.2. Chair according to claim 1, characterized in that the backrest (7) has a substantially displaceable in its plane backrest plate (70) and a guide (72) for the same, and that the adjusting device is an adjusting mechanism which engages on this backrest plate .
3. Stuhl nach Anspruch 2, dadurch gekennzeichnet, dass der Verstellmechanismus (13,14) eine Schwenkachse (9) aufweist, die gleichzeitig eine Schwenkachse des3. Chair according to claim 2, characterized in that the adjusting mechanism (13, 14) has a pivot axis (9) which at the same time is a pivot axis of the
Neigungsmechanismus (8,10) der Lehne ist, sodass die Bewegungen des letzteren sich auf ihn (13,14) über¬ tragen.Tilt mechanism (8, 10) of the backrest is such that the movements of the latter are transferred to it (13, 14).
O PI O PI
4. Stuhl nach Anspruch 3, dadurch gekennzeichnet, dass der Verstellmechanismus aus einem Uebersetzungs- hebelpaar (13) , bestehend aus zwei im wesentlichen L-förmigen Hebeln mit Schenkeln von ungleicher Länge, und einem Mitnehmerbogen (14) besteht, der an seinem einem Ende über eine Schwenkachse (16) am Uebersetzungshebelpaar angelenkt ist, und an dessen anderem Ende die Rückenlehnenplatte (70) mittels einer weiteren Schwenkachse (17) gelenkig angeschlossen ist.4. Chair according to claim 3, characterized in that the adjusting mechanism consists of a pair of translation levers (13) consisting of two substantially L-shaped levers with legs of unequal length, and a driving elbow (14) which is at one end is articulated via a pivot axis (16) on the pair of transmission levers, and at the other end of which the backrest plate (70) is connected in an articulated manner by means of a further pivot axis (17).
5. Stuhl nach den Ansprüchen 3 und 4, dadurch gekenn¬ zeichnet, dass die für den Neigungs- und den Verstellmechanismus gemeinsame Schwenkachse (9) sich am kürzeren Schenkel (13a) jedes Uebersetzungshebels (13) befindet, und dass das Uebersetzungshebelpaar um eine ortsfeste Achse (15) drehbar ist, die im wesentlichen durch die Verbindungsstelle der beiden Schenkel (13a, 13b) hindurchführt und an einem den Sitz (5) haltenden Träger (2) angebracht ist.5. Chair according to claims 3 and 4, characterized gekenn¬ characterized in that for the tilt and the adjustment mechanism common pivot axis (9) is on the shorter leg (13a) of each translation lever (13), and that the pair of translation levers around a stationary Axis (15) is rotatable, which essentially leads through the connection point of the two legs (13a, 13b) and is attached to a support (2) holding the seat (5).
6. Stuhl nach Anspruch 2, dadurch gekennzeichnet, dass die Führung (72) für die Rückenlehnenplatte (70) aus zwei Schienen besteht, von denen jede an ihrem einen Ende starr mit einem Träger eines zum Neigungs¬ mechanismus der LeHne 6. Chair according to claim 2, characterized in that the guide (72) for the backrest plate (70) consists of two rails, each of which is rigid at one end with a support of a to the inclination mechanism of the backrest
(7) gehörenden Führungsteils(7) belonging guide part
(8) verbunden ist. (8) is connected.
EP81902299A 1981-08-19 1981-08-19 Chair Expired EP0085670B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81902299T ATE12168T1 (en) 1981-08-19 1981-08-19 CHAIR.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH1981/000094 WO1983000610A1 (en) 1981-08-19 1981-08-19 Chair

Publications (2)

Publication Number Publication Date
EP0085670A1 true EP0085670A1 (en) 1983-08-17
EP0085670B1 EP0085670B1 (en) 1985-03-20

Family

ID=4538419

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EP (1) EP0085670B1 (en)
JP (1) JPS5841511A (en)
AT (1) ATE12168T1 (en)
AU (1) AU541109B2 (en)
BR (1) BR8109037A (en)
CA (1) CA1183074A (en)
CH (1) CH661647A5 (en)
DE (2) DE3152945C1 (en)
DK (1) DK154921C (en)
FI (1) FI75091C (en)
NO (1) NO160967C (en)
PT (1) PT75330B (en)
WO (1) WO1983000610A1 (en)
ZA (1) ZA825764B (en)

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Cited By (10)

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US4682815A (en) * 1985-04-16 1987-07-28 Steifensand Martin F Chair
DE3608718A1 (en) * 1986-03-15 1987-09-17 Drabert Soehne SEAT FURNITURE
EP0237825A2 (en) * 1986-03-15 1987-09-23 Drabert Söhne GmbH & Co. Sitting-furniture
EP0237825A3 (en) * 1986-03-15 1988-01-07 Drabert Söhne GmbH & Co. Sitting-furniture
US5193880A (en) * 1987-12-29 1993-03-16 Roeder Gmbh Chair, in particular work or office chair
US9526339B2 (en) 2012-09-20 2016-12-27 Steelcase Inc. Control assembly for chair
US9844267B2 (en) 2012-09-20 2017-12-19 Steelcase Inc. Chair back mechanism and control assembly
US9861201B2 (en) 2012-09-20 2018-01-09 Steelcase, Inc. Chair assembly
US9918552B2 (en) 2012-09-20 2018-03-20 Steelcase Inc. Control assembly for chair
US11304528B2 (en) 2012-09-20 2022-04-19 Steelcase Inc. Chair assembly with upholstery covering

Also Published As

Publication number Publication date
AU541109B2 (en) 1984-12-13
ATE12168T1 (en) 1985-04-15
NO831360L (en) 1983-04-18
NO160967B (en) 1989-03-13
ZA825764B (en) 1983-06-29
EP0085670B1 (en) 1985-03-20
FI75091C (en) 1988-05-09
CH661647A5 (en) 1987-08-14
FI831278L (en) 1983-04-15
DK154921C (en) 1989-05-29
FI75091B (en) 1988-01-29
DK170083A (en) 1983-04-18
JPH0230244B2 (en) 1990-07-05
PT75330A (en) 1982-08-01
PT75330B (en) 1984-05-21
US4502729A (en) 1985-03-05
DK154921B (en) 1989-01-09
DE3152945C1 (en) 1987-06-19
WO1983000610A1 (en) 1983-03-03
CA1183074A (en) 1985-02-26
JPS5841511A (en) 1983-03-10
NO160967C (en) 1989-06-21
DE3152945D2 (en) 1983-11-03
DK170083D0 (en) 1983-04-18
BR8109037A (en) 1983-09-06
FI831278A0 (en) 1983-04-15
AU7450581A (en) 1983-03-08

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