EP0648452B1 - A height-adjusting device for the backrest of chairs - Google Patents

A height-adjusting device for the backrest of chairs Download PDF

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Publication number
EP0648452B1
EP0648452B1 EP94112672A EP94112672A EP0648452B1 EP 0648452 B1 EP0648452 B1 EP 0648452B1 EP 94112672 A EP94112672 A EP 94112672A EP 94112672 A EP94112672 A EP 94112672A EP 0648452 B1 EP0648452 B1 EP 0648452B1
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EP
European Patent Office
Prior art keywords
clamping body
height adjustment
clamping
lever
adjustment according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94112672A
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German (de)
French (fr)
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EP0648452A3 (en
EP0648452A2 (en
Inventor
Konrad Neumüller
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.)
Sifa Sitzfabrik GmbH
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Sifa Sitzfabrik GmbH
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Publication date
Application filed by Sifa Sitzfabrik GmbH filed Critical Sifa Sitzfabrik GmbH
Publication of EP0648452A2 publication Critical patent/EP0648452A2/en
Publication of EP0648452A3 publication Critical patent/EP0648452A3/en
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Publication of EP0648452B1 publication Critical patent/EP0648452B1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/402—Support for the head or the back for the back adjustable in height

Definitions

  • the invention relates to a height adjustment for Backrests of chairs, especially of Office swivel chairs, with the features of the preamble of Claim 1.
  • Screw clamps for adjusting the height of a Backrest consisting of a possibly padded back plate that is made with a Fastener is connected, which longitudinally displaceable on a backrest support is arranged, and wherein locking means for mutual jamming of backrest supports and Fastener are available have long been known.
  • the object of the invention is a height adjustment for Backrests of chairs, especially of To create office swivel chairs that are high It is easy to use and easy to use different backrest supports to adapt.
  • a locking means Height adjustment for backrests of chairs type mentioned from a sprag that on the opposite side of the backplate Fastener is arranged.
  • the sprag has at least one through hole or at least a continuous slot and at least one anchor is at one end through a hole or one Passed slot of the fastener and with Undercuts kept in this.
  • the anchor is passed through the clamping body and by means of a hole and a bolt with a Lever connected, the lever is pivotable about the bolt stored and has an approach that is jamming pivotable between the bolt and the clamping body is what the tensile force exerted on the anchor and the simultaneous pressure on the clamp body Fastening element and the backrest support to each other notes. It is advantageous if the approach is around a short distance over the highest pressure point can be swung in and comes into a rest position.
  • the clamping body is advantageously between the Fastener and the bolt adjustable in height designed.
  • the clamping body consists of two adjacent and slidable against each other on an inclined surface Share, at least between stops of both parts a compression spring is arranged, which both parts tends to push apart along the slope.
  • Clamping body an elastic element made of hard rubber or an elastomer.
  • a pressure body is between the approach of the lever and the Clamping body arranged a pressure body.
  • This Pressure body is on one side, for example side pin of the approach of the lever swiveling stored and rounded on its other side and lies in a trough of the clamping body, the pressure body with the approach swung in over the highest pressure point of neck and pressure body in a clamping locking position is feasible.
  • the height adjustment shown in FIGS. 1 to 3 is here with a backrest made of back plate 1, Backrest support 2 and fastener 3 shown.
  • the back plate 1, which is a wooden plate or a Plastic or metal shell can be with the flat fastener 3 screwed.
  • the fastener 3, which is made of metal or plastic can exist, rests on the backrest support 2, being between the fastener 3 and the Backrest support 2 at least matching, preferably profiled sliding surfaces are arranged.
  • the fastening element 3 and the backrest support 2 are connected by the clamping device shown in Fig. 1 in the open and in Fig. 2 in the closed position is shown. One side of the clamp is through Undercuts 15 of an armature 7 formed by Slots in the fastener 3 and the Backrest support 2 is guided.
  • the slot 16 in Fastening element 3 is designed so that the Anchor 7 with its undercuts 15 behind and next to it this comes to mind, while the slot 22 in Backrest support 2 has the length by which the Backrest along the backrest support 3 maximum should be moved.
  • Through the holes 9, 14 is a Bolt 10 inserted so that the lever 8 is pivotable on the Anchor 7 is mounted.
  • the clamping body consists of two rectangular parts 4, 5 with a triangular cross-section, so that there are two sloping Surfaces with which the two parts 4, 5 so lie together that a total of about rectangular cross section results.
  • Both parts 4, 5 can slide against each other on the sloping surfaces, being held together and limited in their movement be that a part 4 laterally pin 21 and that other part towering webs 20 with elongated holes 20 ' having.
  • the sloping surfaces of both parts are as in Fig. 6 in more detail using a bottom view of part 4 is shown, provided with longitudinal grooves 24, each at the flat end of part 4, 5 with stops 4 ' are provided and in which there are compression springs 6 which two parts 4, 5 along their slopes looking to push apart.
  • Both Parts 4, 5 of the sprag strive to be larger Total height compared to the fastening element 3 achieve what is due to wear and tear or fatigue the original elasticity of individual parts always by a quasi growing sprag again will be produced.
  • Both parts 4, 5 of the clamping body have central slots 25 for the armature 7. Between the clamp body and the fastener 3 is one slotted spacer plate 13 inserted.
  • the lever 8 In the open position, the lever 8 is around the bolt 14 pivoted outwards and has the pin 19 in the elongated holes 12 of the pressure body 11 in a brought inclined position. Between Undercuts 15 of the armature 7 and the clamping body 4, 5 there is no clamping.
  • the backrest can be move along the backrest support 2, whereby laterally between a lower area of the Fastening element 2 and an upper area of the Backrest support 2 tension springs 23 indicated in FIG. 5 are attached, the fastener 3 upwards to try to pull.
  • Lever 8 is used to clamp the backrest pivoted below and pulls over its pin 19 in the Elongated holes 12 of the pressure body 11 in a substantial vertical position to that Fastening element 3.
  • the articulated insertion of the Pressure body 11 between the neck 8 '' of the lever 8 and the clamp body has a snap effect that the User makes the setting function noticeable.
  • the Swiveling the pressure body 11 becomes a tensile force the anchor 7 and at the same time a pressure force on the Clamping body exercised, causing the backrest on the Backrest support is clamped.
  • the pressure hull slides a minimal path over the largest Pressure point into a rest position.

Landscapes

  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs Characterized By Structure (AREA)
  • Clamps And Clips (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Abstract

A height-adjusting device for backrests of chairs, the backrest consisting of an optionally padded back plate which is connected to a fastening element arranged longitudinally displaceably on a backrest support, locking means for the mutual clamping of backrest support and fastening element being present, the locking means consisting of a clamping body which is arranged on that side of the fastening element which is opposite the back plate, and the clamping body having at least one through-bore or at least one through-slot, further at least one anchor being passed at its one end through a bore or a slot of the fastening element and being held therein by undercuts and being passed at its other end through the clamping body and being connected by means of a bore and a bolt to a lever, furthermore the lever being pivotably mounted about the bolt and having a projection which can be pivoted in a clamping manner between the bolt and the clamping body, whereby the tensile force exerted on the anchor and the simultaneous pressure on the clamping body locks the fastening element and the backrest support to one another. <IMAGE>

Description

Die Erfindung betrifft eine Höhenverstellung für Rückenlehnen von Stühlen, insbesondere von Bürodrehstühlen, mit den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to a height adjustment for Backrests of chairs, especially of Office swivel chairs, with the features of the preamble of Claim 1.

Schraubklemmungen zum Einstellen der Höhe einer Rückenlehne, wobei die Rückenlehne aus einer ggf. gepolsterten Rückenplatte besteht, die mit einem Befestigungselement verbunden ist, welches längsverschieblich auf einem Rückenlehnenträger angeordnet ist, und wobei Feststellmittel zur gegenseitigen Verklemmung von Rückenlehnenträger und Befestigungselement vorhanden sind, sind lange bekannt.Screw clamps for adjusting the height of a Backrest, the backrest consisting of a possibly padded back plate that is made with a Fastener is connected, which longitudinally displaceable on a backrest support is arranged, and wherein locking means for mutual jamming of backrest supports and Fastener are available have long been known.

Es wurde versucht, demgegenüber den Bedienungskomfort zu erhöhen, indem beispielsweise vorgeschlagen wurde, die Rückenlehne von einer sitzenden Person über ein Handrad und eine Spindel einzustellen (DE-A-39 39 321). Ein anderer Vorschlag zeigt eine Klemmung einer verschieblichen, die Rückenlehne tragenden Stange durch zwei, mittels einer Zugfeder vorgespannte, schwenkbar gelagerte Winkeleisen, die mit Ausnehmungen an der Stange klemmend anliegen und mittels eines Druckknopfs von dieser gelöst werden können (DE-A-22 18 894).An attempt was made to make it easier to use increase, for example by suggesting that Backrest of a seated person using a handwheel and adjust a spindle (DE-A-39 39 321). A another suggestion shows a clamping of one movable rod carrying the backrest two, pivoted by means of a tension spring stored angle iron, with recesses on the rod clamped and with a push button from this can be solved (DE-A-22 18 894).

Aufgabe der Erfindung ist es, eine Höhenverstellung für Rückenlehnen von Stühlen, insbesondere von Bürodrehstühlen zu schaffen, die einen hohen Bedienungskomfort aufweist und die einfach an verschiedene Rückenlehnenträger zu adaptieren ist. The object of the invention is a height adjustment for Backrests of chairs, especially of To create office swivel chairs that are high It is easy to use and easy to use different backrest supports to adapt.

Diese Aufgabe wird mit den im kennzeichnenden Teil des Anspruchs 1 genannten Merkmalen gelöst. Fortbildungen und vorteilhafte Ausführungen der Erfindung sind in den weiteren Ansprüchen umfaßt.This task is carried out in the characteristic part of the Features mentioned claim 1 solved. Training and advantageous embodiments of the invention are in the further claims.

Erfindungsgemäß besteht das Feststellmittel einer Höhenverstellung für Rückenlehnen von Stühlen der eingangs genannten Art aus einem Klemmkörper, der auf der der Rückenplatte entgegengesetzten Seite des Befestigungselements angeordnet ist. Der Klemmkörper weist mindestens eine Durchgangsbohrung oder mindestens einen durchgehenden Schlitz auf und mindestens ein Anker ist an seinem einen Ende durch eine Bohrung oder einen Schlitz des Befestigungselements hindurchgeführt und mit Hinterschneidungen in diesem gehalten. An seinem anderen Ende ist der Anker durch den Klemmkörper hindurchgeführt und mittels einer Bohrung und eines Bolzens mit einem Hebel verbunden, der Hebel ist um den Bolzen schwenkbar gelagert und weist einen Ansatz auf, der klemmend zwischen den Bolzen und den Klemmkörper einschwenkbar ist, wodurch die auf den Anker ausgeübte Zugkraft und der gleichzeitige Druck auf den Klemmkörper das Befestigungselement und den Rückenlehnenträger zueinander feststellt. Dabei ist es vorteilhaft, wenn der Ansatz um eine geringe Strecke über den höchsten Druckpunkt eingeschwenkt werden kann und in eine Rastposition kommt.According to the invention there is a locking means Height adjustment for backrests of chairs type mentioned from a sprag that on the opposite side of the backplate Fastener is arranged. The sprag has at least one through hole or at least a continuous slot and at least one anchor is at one end through a hole or one Passed slot of the fastener and with Undercuts kept in this. On his other At the end the anchor is passed through the clamping body and by means of a hole and a bolt with a Lever connected, the lever is pivotable about the bolt stored and has an approach that is jamming pivotable between the bolt and the clamping body is what the tensile force exerted on the anchor and the simultaneous pressure on the clamp body Fastening element and the backrest support to each other notes. It is advantageous if the approach is around a short distance over the highest pressure point can be swung in and comes into a rest position.

Vorteilhafterweise ist der Klemmkörper zwischen dem Befestigungselement und dem Bolzen höhenveränderlich ausgelegt.The clamping body is advantageously between the Fastener and the bolt adjustable in height designed.

Nach einer besonders bevorzugten Ausführung der Erfindung besteht der Klemmkörper aus zwei aneinanderliegenden und gegeneinander auf einer schrägen Fläche verschiebbaren Teilen, wobei zwischen Anschlägen beider Teile mindestens eine Druckfeder angeordnet ist, welche beide Teile entlang der Schräge auseinanderzudrücken strebt. Durch diese Anordnung wird erreicht, daß sich die Klemmung selbsttätig nachstellt, da die Druckfeder den Klemmkörper stets zur Anlage an das Befestigungselement und den Ansatz drückt und genügend Spielraum zum Nachstellen zwischen den beiden Teilen des Klemmkörpers vorhanden ist. Die aneinanderliegenden Teile des Klemmkörpers können auch mit zueinander passenden Rastmitteln, wie Stufen oder Verzahnungen versehen sein.According to a particularly preferred embodiment of the invention the clamping body consists of two adjacent and slidable against each other on an inclined surface Share, at least between stops of both parts a compression spring is arranged, which both parts tends to push apart along the slope. By this arrangement ensures that the clamping adjusts itself automatically because the compression spring adjusts the clamping body always on the fastener and the Approach presses and enough room to readjust between the two parts of the sprag is. The adjacent parts of the sprag can also be used with matching locking devices, such as Steps or gears can be provided.

Nach einer anderen Ausführung der Erfindung ist der Klemmkörper ein elastisches Element aus Hartgummi oder einem Elastomer.According to another embodiment of the invention Clamping body an elastic element made of hard rubber or an elastomer.

Nach einer weiteren besonders bevorzugten Ausführung der Erfindung ist zwischen dem Ansatz des Hebels und dem Klemmkörper ein Druckkörper angeordnet. Dieser Druckkörper ist beispielsweise an seiner einen Seite an seitlichen Zapfen des Ansatzes des Hebels schwenkbar gelagert und an seiner anderen Seite abgerundet und liegt in einer Mulde des Klemmkörpers, wobei der Druckkörper bei eingeschwenktem Ansatz über den höchsten Druckpunkt von Ansatz und Druckkörper in eine klemmende Rastposition bringbar ist.According to another particularly preferred embodiment of the Invention is between the approach of the lever and the Clamping body arranged a pressure body. This Pressure body is on one side, for example side pin of the approach of the lever swiveling stored and rounded on its other side and lies in a trough of the clamping body, the pressure body with the approach swung in over the highest pressure point of neck and pressure body in a clamping locking position is feasible.

Vorteilhafterweise ist zur Erhöhung des Bedienungskomforts zwischen einem oberen Bereich des Rückenlehnenträgers und einem unteren Bereich des Befestigungselements wenigstens eine Zugfeder eingesetzt.It is advantageous to increase the Ease of use between an upper area of the Backrest support and a lower area of the Fastening element used at least one tension spring.

Im folgenden wird die Erfindung anhand von Zeichnungen beispielhaft näher beschrieben. Dabei zeigen:

Fig. 1
eine Seitenansicht der Höhenverstellung in geöffneter Position;
Fig. 2
die Seitenansicht gemäß Fig. 1 in Klemmposition;
Fig. 3
eine Explosionsdarstellung der Höhenverstellung;
Fig. 4
eine Unteransicht des Hebels;
Fig. 5
eine Vorderansicht des Druckkörpers;
Fig. 6
eine Unteransicht eines Teils des Klemmkörpers.
The invention is described in more detail below by way of example with reference to drawings. Show:
Fig. 1
a side view of the height adjustment in the open position;
Fig. 2
the side view of Figure 1 in the clamping position.
Fig. 3
an exploded view of the height adjustment;
Fig. 4
a bottom view of the lever;
Fig. 5
a front view of the pressure body;
Fig. 6
a bottom view of part of the clamp body.

Die in den Fig. 1 bis 3 gezeigte Höhenverstellung ist hier mit einer Rückenlehne aus Rückenplatte 1, Rückenlehnenträger 2 und Befestigungselement 3 gezeigt. Die Rückenplatte 1, die eine Holzplatte oder eine Kunststoff- oder Metallschale sein kann, ist mit dem flächig ausgebildeten Befestigungselement 3 verschraubt. Das Befestigungselement 3, das aus Metall oder Kunststoff bestehen kann, liegt an dem Rückenlehnenträger 2 an, wobei zwischen dem Befestigungselement 3 und dem Rückenlehnenträger 2 wenigstens zueinander passende, vorzugsweise profilierte Gleitflächen angeordnet sind. Das Befestigungselement 3 und der Rückenlehnenträger 2 werden durch die Klemmvorrichtung verbunden, die in Fig. 1 in geöffneter und in Fig. 2 in geschlossener Position gezeigt ist. Die eine Seite der Klemmung wird durch Hinterschneidungen 15 eines Ankers 7 gebildet, der durch Schlitze in dem Befestigungselement 3 und dem Rückenlehnenträger 2 geführt ist. Der Schlitz 16 im Befestigungselement 3 ist dabei so ausgelegt, daß der Anker 7 mit seinen Hinterschneidungen 15 hinter und neben diesem zum Anliegen kommt, während der Schlitz 22 im Rückenlehnenträger 2 die Länge aufweist, um die die Rückenlehne entlang des Rückenlehnenträgers 3 maximal bewegt werden soll. An seinem anderen Ende weist der Anker 7 eine Bohrung 14 auf, mit der er in eine mittige Ausnehmung 8' an einem in Klemmposition auf das Befestigungselement gerichteten Ansatz 8'' eines Hebels 8 greift, welcher seitlich dieser Ausnehmung 8' ebenfalls Bohrungen 9 aufweist. Durch die Bohrungen 9, 14 ist ein Bolzen 10 gesteckt, so daß der Hebel 8 schwenkbar an dem Anker 7 gelagert ist. Der Hebel 8, der in Fig. 4 in der Unteransicht dargestellt ist, weist weiter außen an dem Ansatz 8'' Zapfen 19 auf, die in Langlöcher 12 in seitlich hochstehenden Lappen 11'' eines in Fig. 5 näher dargestellten Druckkörpers 11 greifen, der mit seinem anderen, abgerundeten Ende 11' in einer Mulde eines Klemmkörpers liegt. Der Druckkörper 11 weist eine mittige Ausnehmung 11''' für den Anker 7 auf.The height adjustment shown in FIGS. 1 to 3 is here with a backrest made of back plate 1, Backrest support 2 and fastener 3 shown. The back plate 1, which is a wooden plate or a Plastic or metal shell can be with the flat fastener 3 screwed. The fastener 3, which is made of metal or plastic can exist, rests on the backrest support 2, being between the fastener 3 and the Backrest support 2 at least matching, preferably profiled sliding surfaces are arranged. The fastening element 3 and the backrest support 2 are connected by the clamping device shown in Fig. 1 in the open and in Fig. 2 in the closed position is shown. One side of the clamp is through Undercuts 15 of an armature 7 formed by Slots in the fastener 3 and the Backrest support 2 is guided. The slot 16 in Fastening element 3 is designed so that the Anchor 7 with its undercuts 15 behind and next to it this comes to mind, while the slot 22 in Backrest support 2 has the length by which the Backrest along the backrest support 3 maximum should be moved. At its other end, the Anchor 7 on a bore 14, with which he in a central Recess 8 'in a clamped position on the Fastener directed approach 8 '' of a lever 8 engages, which also laterally this recess 8 ' Has holes 9. Through the holes 9, 14 is a Bolt 10 inserted so that the lever 8 is pivotable on the Anchor 7 is mounted. The lever 8, which in Fig. 4 in the Bottom view is shown points further out to the Approach 8 '' pin 19, which in slots 12 in laterally projecting tab 11 '' one in Fig. 5 closer grasp the pressure body 11 shown with his another, rounded end 11 'in a trough one Clamping body lies. The pressure body 11 has a central one Recess 11 '' 'for the armature 7.

Der Klemmkörper besteht aus zwei rechteckigen Teilen 4, 5 mit dreieckigem Querschnitt, so daß sich zwei schräge Flächen ergeben, mit denen die beiden Teile 4, 5 so aneinanderliegen, daß sich insgesamt ein etwa rechteckiger Querschnitt ergibt. Beide Teile 4, 5 können gegeneinander auf den schrägen Flächen gleiten, wobei sie dadurch zusammengehalten und in ihrer Bewegung begrenzt werden, daß das eine Teil 4 seitlich Zapfen 21 und das andere Teil hochragende Stege 20 mit Langlöchern 20' aufweist. Die schrägen Flächen beider Teile sind, wie in Fig. 6 anhand einer Unteransicht auf Teil 4 genauer dargestellt ist, mit Längsnuten 24 versehen, die jeweils an dem flachen Ende des Teils 4, 5 mit Anschlägen 4' versehen sind und in denen Druckfedern 6 liegen, die die beiden Teile 4, 5 entlang ihrer Schrägen auseinanderzudrücken suchen. Dadurch sind die beiden Teile 4, 5 des Klemmkörpers bestrebt, eine größere Gesamthöhe gegenüber dem Befestigungselement 3 zu erreichen, wodurch die durch Abnutzung oder Ermüdung einzelner Teile nachlassende ursprüngliche Spannkraft stets durch einen quasi wachsenden Klemmkörper wieder hergestellt wird. Beide Teile 4, 5 des Klemmkörpers weisen mittige Schlitze 25 für den Anker 7 auf. Zwischen dem Klemmkörper und dem Befestigungselement 3 ist eine geschlitzte Abstandsplatte 13 eingesetzt.The clamping body consists of two rectangular parts 4, 5 with a triangular cross-section, so that there are two sloping Surfaces with which the two parts 4, 5 so lie together that a total of about rectangular cross section results. Both parts 4, 5 can slide against each other on the sloping surfaces, being held together and limited in their movement be that a part 4 laterally pin 21 and that other part towering webs 20 with elongated holes 20 ' having. The sloping surfaces of both parts are as in Fig. 6 in more detail using a bottom view of part 4 is shown, provided with longitudinal grooves 24, each at the flat end of part 4, 5 with stops 4 ' are provided and in which there are compression springs 6 which two parts 4, 5 along their slopes looking to push apart. This makes them both Parts 4, 5 of the sprag strive to be larger Total height compared to the fastening element 3 achieve what is due to wear and tear or fatigue the original elasticity of individual parts always by a quasi growing sprag again will be produced. Both parts 4, 5 of the clamping body have central slots 25 for the armature 7. Between the clamp body and the fastener 3 is one slotted spacer plate 13 inserted.

In der geöffneten Position ist der Hebel 8 um den Bolzen 14 nach außen geschwenkt und hat über die Zapfen 19 in den Langlöchern 12 des Druckkörpers 11 diesen in eine geneigte Position gebracht. Zwischen den Hinterschneidungen 15 des Ankers 7 und dem Klemmkörper 4, 5 findet keine Klemmung statt. Die Rückenlehne läßt sich entlang des Rückenlehnenträgers 2 verschieben, wobei seitlich zwischen einem unteren Bereich des Befestigungselements 2 und einem oberen Bereich des Rückenlehnenträgers 2 in Fig. 5 angedeutete Zugfedern 23 eingehängt sind, die das Befestigungselement 3 nach oben zu ziehen trachten.In the open position, the lever 8 is around the bolt 14 pivoted outwards and has the pin 19 in the elongated holes 12 of the pressure body 11 in a brought inclined position. Between Undercuts 15 of the armature 7 and the clamping body 4, 5 there is no clamping. The backrest can be move along the backrest support 2, whereby laterally between a lower area of the Fastening element 2 and an upper area of the Backrest support 2 tension springs 23 indicated in FIG. 5 are attached, the fastener 3 upwards to try to pull.

Zum Festklemmen der Rückenlehne wird der Hebel 8 nach unten geschwenkt und zieht über seine Zapfen 19 in den Langlöchern 12 des Druckkörpers 11 diesen in eine im wesentlichen vertikale Position zu dem Befestigungselement 3. Durch das gelenkige Einsetzen des Druckkörpers 11 zwischen dem Ansatz 8'' des Hebels 8 und dem Klemmkörper wird ein Schnappeffekt erzielt, der dem Benutzer die Stellfunktion fühlbar macht. Durch das Einschwenken des Druckkörpers 11 wird eine Zugkraft auf den Anker 7 und gleichzeitig eine Druckkraft auf den Klemmkörper ausgeübt, wodurch die Rückenlehne an dem Rückenlehnenträger festgeklemmt wird. Der Druckkörper gleitet dabei einen minimalen Weg über den größten Druckpunkt hinaus in eine Rastposition.Lever 8 is used to clamp the backrest pivoted below and pulls over its pin 19 in the Elongated holes 12 of the pressure body 11 in a substantial vertical position to that Fastening element 3. By the articulated insertion of the Pressure body 11 between the neck 8 '' of the lever 8 and the clamp body has a snap effect that the User makes the setting function noticeable. By the Swiveling the pressure body 11 becomes a tensile force the anchor 7 and at the same time a pressure force on the Clamping body exercised, causing the backrest on the Backrest support is clamped. The pressure hull slides a minimal path over the largest Pressure point into a rest position.

Claims (8)

  1. A height adjustment for the backrests of chairs, more particularly office swivel chairs, wherein the backrest consists of an optionally padded backplate (1) which is connected to an attachment element (3) arranged so as to be displaceable longitudinally of a backrest support (2), and wherein locking means are present for mutually locking the backrest support (2) and the attachment element (3) together, characterised in that the locking means comprise a clamping body (4, 5) which is arranged on the opposite side of the attachment element (3) from the back plate (1), in that the clamping body (4, 5) has at least one hole or slot passing therethrough, in that one end of at least one fixing element (7) passes through a hole or slot in the attachment element (3) and is fixed therein by undercuts (15), in that, at its other end, the fixing element (7) is guided through the clamping body (4, 5) and by means of a hole and a pin (10) is connected to a lever (8), in that the lever (8) is mounted so as to pivot around the pin (10), and in that the lever (8) has a projection which may be pivoted inwards between the pin (10) and the clamping body (4, 5) to effect clamping, thereby causing the tensile force exerted on the anchor (7) and the simultaneous pressure on the clamping body (4, 5) to lock the attachment element (3) and the backrest support (2) together.
  2. A height adjustment according to Claim 1, characterised in that the clamping body (4, 5) is vertically adjustable between the attachment element (3) and the pin (10).
  3. A height adjustment according to Claim 2, characterised in that the clamping body (4, 5) consists of two mutually adjacent parts which are displaceable relative to one another on an inclined surface, and at least one compression spring (6) is positioned between stops (4') of the two parts which tends to force the two parts apart along the inclined surface.
  4. A height adjustment according to Claim 3, characterised in that the adjacent parts of the clamping body are provided with matching detent means, such as steps or teeth.
  5. A height adjustment according to Claim 2, characterised in that the clamping body is a resilient element made of hard rubber or an elastomer.
  6. A height adjustment according to Claim 1, characterised in that a pressure body (11) is arranged between the projection (8'') of the lever (8) and the clamping body (4, 5).
  7. A height adjustment according to Claim 6, characterised in that, on one side, the pressure body (11) is pivotally mounted on lateral bearing (19) of the projection (8'') of the lever (8) and on its other side is rounded off and lies in a depression of the clamping body (4, 5), wherein, with the projection (8'') pivoted inwards, the pressure body (11) may be moved over the maximum centre of pressure of the projection (8'') and the pressure body (11) into a clamping detent position.
  8. A height adjustment according to Claim 1, characterised in that at least one tension spring (23) is fitted between an upper region of the backrest support (2) and a lower region of the attachment element (3).
EP94112672A 1993-10-15 1994-08-13 A height-adjusting device for the backrest of chairs Expired - Lifetime EP0648452B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4335320 1993-10-15
DE4335320A DE4335320A1 (en) 1993-10-15 1993-10-15 Height adjustment for backrests of chairs

Publications (3)

Publication Number Publication Date
EP0648452A2 EP0648452A2 (en) 1995-04-19
EP0648452A3 EP0648452A3 (en) 1995-12-27
EP0648452B1 true EP0648452B1 (en) 1998-03-18

Family

ID=6500315

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94112672A Expired - Lifetime EP0648452B1 (en) 1993-10-15 1994-08-13 A height-adjusting device for the backrest of chairs

Country Status (14)

Country Link
US (1) US5551754A (en)
EP (1) EP0648452B1 (en)
AT (1) ATE164047T1 (en)
AU (1) AU665154B2 (en)
CA (1) CA2118076C (en)
DE (2) DE4335320A1 (en)
DK (1) DK0648452T3 (en)
ES (1) ES2117742T3 (en)
FI (1) FI944813A (en)
IL (1) IL111089A (en)
NO (1) NO305971B1 (en)
RU (1) RU2101994C1 (en)
TR (1) TR28728A (en)
ZA (1) ZA948057B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29600214U1 (en) * 1996-01-08 1996-02-29 Sifa Sitzfabrik Gmbh Clamp for height-adjustable backrests
US5921630A (en) * 1997-06-06 1999-07-13 Cassaday; Terrence Joseph Height adjustment mechanism for a back rest or an arm rest of a chair
US6010193A (en) * 1997-07-14 2000-01-04 Honda Giken Kogyo Kabushiki Kaisha Anti-rattle guide assembly for supporting an armrest or other structure moveable between extended and retracted positions
DE19731105C2 (en) * 1997-07-19 1999-12-16 Thomas Barth backrest
US6523895B1 (en) * 1999-02-05 2003-02-25 Davis Furniture Industries, Inc. Ergonomic chair
US6062647A (en) * 1999-07-08 2000-05-16 Mei; Teng-Fu Adjustable armrest assembly
US6354664B1 (en) * 2000-11-28 2002-03-12 Su-Ming Chen Height adjusting device for a chair
US7210742B2 (en) * 2005-03-22 2007-05-01 Yao-Chuan Wu Distance adjustment device for chair
CN2848623Y (en) * 2005-09-28 2006-12-20 明门实业股份有限公司 Automobile child seat capable of regulating hand rail heightness
US9138061B1 (en) * 2012-12-05 2015-09-22 Joel H. Eisenberg Seating
US9770111B2 (en) 2015-03-05 2017-09-26 A-Dec, Inc. Height adjusting mechanism and stool for dental practitioner
KR101698730B1 (en) * 2016-11-01 2017-01-20 이명주 Position adjusting device of footrest for car seat

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1336510A (en) * 1918-12-19 1920-04-13 Collier Keyworth Company Chair-iron
US3526430A (en) * 1968-11-18 1970-09-01 Art Metal Knoll Corp Back height adjustment mechanism
DE2218894A1 (en) * 1972-04-19 1973-10-31 Froescher Kg August BACKREST ADJUSTING DEVICE, IN PARTICULAR FOR OFFICE CHAIRS
SE404407B (en) * 1977-12-14 1978-10-02 Kalmar Lens Landsting DELIVERABLE LASEN DEVICE FOR ROWS AND SHAFTS
JPS56145848A (en) * 1980-04-14 1981-11-12 Morita Mfg Apparatus for adjusting inclination of head rest of treating table
US4596484A (en) * 1984-10-05 1986-06-24 Velbon International Corporation Lock for telescoping tubular support
US4616877A (en) * 1985-05-09 1986-10-14 Kimball International, Inc. Chair with back height adjustment
US5035466A (en) * 1989-04-03 1991-07-30 Krueger International, Inc. Ergonomic chair
US5007678A (en) * 1989-10-11 1991-04-16 Steelcase Inc. Chair back height adjustment mechanism
DE3939321C2 (en) * 1989-11-28 1993-11-04 Kaltenbach & Voigt CHAIR WITH HEIGHT-ADJUSTABLE BACKREST
US5232265A (en) * 1992-02-11 1993-08-03 Shepherd Products U.S., Inc. Vertical back adjust for chairs
US5382077A (en) * 1992-07-29 1995-01-17 Doerner Products Ltd. Height adjustment mechanism for a chair seat back

Also Published As

Publication number Publication date
EP0648452A3 (en) 1995-12-27
ZA948057B (en) 1995-06-09
ATE164047T1 (en) 1998-04-15
DK0648452T3 (en) 1998-12-07
NO305971B1 (en) 1999-08-30
FI944813A (en) 1995-04-16
IL111089A (en) 1998-06-15
ES2117742T3 (en) 1998-08-16
DE59405465D1 (en) 1998-04-23
AU665154B2 (en) 1995-12-14
IL111089A0 (en) 1994-11-28
NO943437L (en) 1995-04-18
AU7427294A (en) 1995-06-22
TR28728A (en) 1997-02-20
NO943437D0 (en) 1994-09-15
CA2118076A1 (en) 1995-04-16
DE4335320A1 (en) 1995-04-20
US5551754A (en) 1996-09-03
FI944813A0 (en) 1994-10-13
RU2101994C1 (en) 1998-01-20
RU94036442A (en) 1996-07-27
CA2118076C (en) 1999-11-16
EP0648452A2 (en) 1995-04-19

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