EP0648452A2 - A height-adjusting device for the backrest of chairs - Google Patents
A height-adjusting device for the backrest of chairs Download PDFInfo
- Publication number
- EP0648452A2 EP0648452A2 EP94112672A EP94112672A EP0648452A2 EP 0648452 A2 EP0648452 A2 EP 0648452A2 EP 94112672 A EP94112672 A EP 94112672A EP 94112672 A EP94112672 A EP 94112672A EP 0648452 A2 EP0648452 A2 EP 0648452A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- clamping body
- fastening element
- height adjustment
- lever
- clamping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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, in particular office swivel chairs, with the features of the preamble of claim 1.
- Screw clamps for adjusting the height of a backrest consisting of an optionally padded backplate, which is connected to a fastening element which is arranged in a longitudinally displaceable manner on a backrest support, and with locking means for mutually clamping the backrest support and fastening element, have been known for a long time .
- the object of the invention is to provide a height adjustment for backrests of chairs, in particular office swivel chairs, which is extremely easy to use and which can be easily adapted to different backrest supports.
- the fixing means of a height adjustment for backrests of chairs of the type mentioned at the beginning consists of a clamping body which is arranged on the side of the fastening element opposite the back plate.
- the clamping body has at least one through bore or at least one through slot and at least one anchor is guided at one end through a bore or a slot of the fastening element and held therein with undercuts.
- the armature is passed through the clamping body and connected to a lever by means of a bore and a pin, the lever is pivotably mounted around the pin and has an attachment which can be pivoted in between the pin and the clamping body in a clamping manner, as a result of which the tensile force exerted on the anchor and the simultaneous pressure on the clamping body determines the fastening element and the backrest support to one another. It is advantageous if the attachment can be swiveled in a short distance over the highest pressure point and comes into a latching position.
- the clamping body between the fastening element and the bolt is advantageously designed to be adjustable in height.
- the clamping body consists of two parts lying against one another and displaceable relative to one another on an inclined surface, wherein at least one compression spring is arranged between stops of both parts, which strives to press both parts apart along the incline.
- This arrangement ensures that the clamping adjusts itself automatically, since the compression spring always presses the clamp body to rest against the fastening element and the shoulder and there is sufficient scope for readjustment between the two parts of the clamp body.
- the abutting parts of the clamping body can also be provided with matching locking means, such as steps or toothings.
- the clamping body is an elastic element made of hard rubber or an elastomer.
- a pressure body is arranged between the shoulder of the lever and the clamping body.
- This pressure body is, for example, pivotally mounted on one side on the side pin of the extension of the lever and rounded on the other side and lies in a trough of the clamping body, the pressure body being able to be brought into a clamping locking position over the highest pressure point of the extension and the pressure body when the extension is pivoted in is.
- At least one tension spring is advantageously used between an upper region of the backrest support and a lower region of the fastening element.
- FIGS. 1 to 3 The height adjustment shown in FIGS. 1 to 3 is shown here with a backrest made of back plate 1, backrest support 2 and fastening element 3.
- the back plate 1 which can be a wooden plate or a plastic or metal shell, is screwed to the flat fastening element 3.
- the fastening element 3 and the backrest support 2 are connected by the clamping device, which is shown in FIG. 1 in the open position and in FIG. 2 in the closed position.
- One side of the clamp is formed by undercuts 15 of an anchor 7, which is guided through slots in the fastening element 3 and the backrest support 2.
- the slot 16 in the fastening element 3 is designed so that the anchor 7 with its undercuts 15 comes to rest behind and next to it, while the slot 22 in the backrest support 2 has the length by which the backrest is to be moved along the backrest support 3 to the maximum .
- the armature 7 has a bore 14, with which it engages in a central recess 8 'on an attachment 8''of a lever 8 which is directed towards the fastening element in the clamping position and which also has holes 9 on the side of this recess 8'.
- a bolt 10 is inserted through the bores 9, 14 so that the lever 8 is pivotably mounted on the armature 7.
- the clamping body consists of two rectangular parts 4, 5 with a triangular cross-section, so that there are two inclined surfaces with which the two parts 4, 5 lie against each other so that there is an overall approximately rectangular cross-section. Both parts 4, 5 can slide against each other on the inclined surfaces, whereby they are held together and limited in their movement in that one part 4 laterally has pins 21 and the other part has protruding webs 20 with elongated holes 20 '.
- the inclined surfaces of both parts as is shown in more detail in FIG. 6 with reference to part 4, are provided with longitudinal grooves 24, which are each provided with stops 4 'at the flat end of part 4, 5 and in which compression springs 6 are located looking to push the two parts 4, 5 apart along their slopes.
- both parts 4, 5 of the clamping body endeavor to achieve a greater overall height than the fastening element 3, as a result of which the original clamping force, which decreases due to wear or fatigue of individual parts, is always restored by a quasi-growing clamping body.
- Both parts 4, 5 of the clamping body have central slots 25 for the armature 7.
- a slotted spacer plate 13 is inserted between the clamping body and the fastening element 3.
- the lever 8 In the open position, the lever 8 is pivoted outward about the bolt 14 and has brought it into an inclined position via the pins 19 in the elongated holes 12 of the pressure body 11. No clamping takes place between the undercuts 15 of the armature 7 and the clamping body 4, 5.
- the backrest can be moved along the backrest support 2, being laterally between a lower region of the Fastening element 2 and an upper region of the backrest support 2 in Fig. 5 indicated tension springs 23 are attached, which try to pull the fastening element 3 upwards.
- the lever 8 is pivoted downward and pulls its pin 19 in the elongated holes 12 of the pressure body 11 in a substantially vertical position to the fastening element 3.
- a snap effect is achieved, which makes the adjustment function perceptible to the user.
- a tensile force is exerted on the armature 7 and at the same time a pressure force is exerted on the clamping body, as a result of which the backrest is clamped to the backrest support.
- the pressure body slides a minimal path beyond the largest pressure point into a latching 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
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, in particular office swivel chairs, with the features of the preamble of
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 an optionally padded backplate, which is connected to a fastening element which is arranged in a longitudinally displaceable manner on a backrest support, and with locking means for mutually clamping the backrest support and fastening element, have been known for a long time .
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).Attempts have been made to increase the ease of use, for example by proposing to adjust the backrest of a seated person using a handwheel and a spindle (DE-A-39 39 321). Another proposal shows the clamping of a displaceable rod that supports the backrest by means of two pivoted angle irons that are preloaded by means of a tension spring, which are clamped with recesses on the rod and can be released from the latter by means of a push button (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 to provide a height adjustment for backrests of chairs, in particular office swivel chairs, which is extremely easy to use and which can be easily adapted to different backrest supports.
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 object is achieved with the features mentioned in the characterizing part of
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, the fixing means of a height adjustment for backrests of chairs of the type mentioned at the beginning consists of a clamping body which is arranged on the side of the fastening element opposite the back plate. The clamping body has at least one through bore or at least one through slot and at least one anchor is guided at one end through a bore or a slot of the fastening element and held therein with undercuts. At its other end, the armature is passed through the clamping body and connected to a lever by means of a bore and a pin, the lever is pivotably mounted around the pin and has an attachment which can be pivoted in between the pin and the clamping body in a clamping manner, as a result of which the tensile force exerted on the anchor and the simultaneous pressure on the clamping body determines the fastening element and the backrest support to one another. It is advantageous if the attachment can be swiveled in a short distance over the highest pressure point and comes into a latching position.
Vorteilhafterweise ist der Klemmkörper zwischen dem Befestigungselement und dem Bolzen höhenveränderlich ausgelegt.The clamping body between the fastening element and the bolt is advantageously designed to be adjustable in height.
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 parts lying against one another and displaceable relative to one another on an inclined surface, wherein at least one compression spring is arranged between stops of both parts, which strives to press both parts apart along the incline. This arrangement ensures that the clamping adjusts itself automatically, since the compression spring always presses the clamp body to rest against the fastening element and the shoulder and there is sufficient scope for readjustment between the two parts of the clamp body. The abutting parts of the clamping body can also be provided with matching locking means, such as steps or toothings.
Nach einer anderen Ausführung der Erfindung ist der Klemmkörper ein elastisches Element aus Hartgummi oder einem Elastomer.According to another embodiment of the invention, the clamping body is 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 a further particularly preferred embodiment of the invention, a pressure body is arranged between the shoulder of the lever and the clamping body. This pressure body is, for example, pivotally mounted on one side on the side pin of the extension of the lever and rounded on the other side and lies in a trough of the clamping body, the pressure body being able to be brought into a clamping locking position over the highest pressure point of the extension and the pressure body when the extension is pivoted in is.
Vorteilhafterweise ist zur Erhöhung des Bedienungskomforts zwischen einem oberen Bereich des Rückenlehnenträgers und einem unteren Bereich des Befestigungselements wenigstens eine Zugfeder eingesetzt.To increase the ease of use, at least one tension spring is advantageously used between an upper region of the backrest support and a lower region of the fastening element.
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.
- 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 shown here with a backrest made of
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
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
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.To clamp the backrest, the
Claims (8)
dadurch gekennzeichnet,
daß das Feststellmittel aus einem Klemmkörper (4, 5) besteht, der auf der der Rückenplatte (1) entgegengesetzten Seite des Befestigungselements (3) angeordnet ist,
daß der Klemmkörper (4, 5) mindestens eine Durchgangsbohrung oder mindestens einen durchgehenden Schlitz aufweist,
daß mindestens ein Anker (7) an seinem einen Ende durch eine Bohrung oder einen Schlitz des Befestigungselements (3) hindurchgeführt und mit Hinterschneidungen (15) in diesem gehalten ist,
daß der Anker (7) an seinem anderen Ende durch den Klemmkörper (4, 5) hindurchgeführt ist und mittels einer Bohrung und eines Bolzens (10) mit einem Hebel (8) verbunden ist,
daß der Hebel (8) um den Bolzen (10) schwenkbar gelagert ist,
und daß der Hebel (8) einen Ansatz aufweist, der klemmend zwischen den Bolzen (10) und den Klemmkörper (4, 5) einschwenkbar ist, wodurch die auf den Anker (7) ausgeübte Zugkraft und der gleichzeitige Druck auf den Klemmkörper (4, 5) das Befestigungselement (3) und den Rückenlehnenträger (2) zueinander feststellt.Height adjustment for backrests of chairs, in particular office swivel chairs, the backrest consisting of a possibly padded back plate (1), which is connected to a fastening element (3), which is arranged to be longitudinally displaceable on a backrest support (2), and with locking means for mutual purposes Jamming of the backrest support (2) and fastening element (3) are present,
characterized by
that the locking means consists of a clamping body (4, 5) which is arranged on the side of the fastening element (3) opposite the back plate (1),
that the clamping body (4, 5) has at least one through hole or at least one through slot,
that at least one anchor (7) is guided at one end through a bore or a slot in the fastening element (3) and is held therein with undercuts (15),
that the armature (7) is guided at its other end through the clamping body (4, 5) and is connected to a lever (8) by means of a bore and a bolt (10),
that the lever (8) is pivotally mounted about the bolt (10),
and that the lever (8) has a projection which can be pivoted in between the bolt (10) and the clamping body (4, 5), as a result of which the tensile force exerted on the armature (7) and the simultaneous pressure on the Clamping body (4, 5) the fastening element (3) and the backrest support (2) to each other.
dadurch gekennzeichnet,
daß der Klemmkörper (4, 5) zwischen dem Befestigungselement (3) und dem Bolzen (10) höhenveränderlich ist.Height adjustment according to claim 1,
characterized by
that the clamping body (4, 5) between the fastening element (3) and the bolt (10) is variable in height.
dadurch gekennzeichnet,
daß der Klemmkörper (4, 5) aus zwei aneinanderliegenden und gegeneinander auf einer schrägen Fläche verschiebbaren Teilen besteht, wobei zwischen Anschlägen (4') beider Teile mindestens eine Druckfeder (6) angeordnet ist, welche beide Teile entlang der Schräge auseinanderzudrücken strebt.Height adjustment according to claim 2,
characterized by
that the clamping body (4, 5) consists of two parts lying against each other and displaceable on an inclined surface, at least one compression spring (6) being arranged between stops (4 ') of both parts, which strives to press both parts apart along the slope.
dadurch gekennzeichnet,
daß die aneinanderliegenden Teile des Klemmkörpers mit zueinander passenden Rastmitteln, wie Stufen oder Verzahnungen versehen sind.Height adjustment according to claim 3,
characterized by
that the adjacent parts of the clamping body are provided with matching locking means, such as steps or teeth.
dadurch gekennzeichnet,
daß der Klemmkörper ein elastisches Element aus Hartgummi oder einem Elastomer ist.Height adjustment according to claim 2,
characterized by
that the clamping body is an elastic element made of hard rubber or an elastomer.
dadurch gekennzeichnet,
daß zwischen dem Ansatz (8'') des Hebels (8) und dem Klemmkörper (4, 5) ein Druckkörper (11) angeordnet ist.Height adjustment according to claim 1,
characterized by
that a pressure body (11) is arranged between the shoulder (8 '') of the lever (8) and the clamping body (4, 5).
dadurch gekennzeichnet,
daß der Druckkörper (11) an seiner einen Seite an seitlichen Zapfen (19) des Ansatzes (8'') des Hebels (8) schwenkbar gelagert ist und an seiner anderen Seite abgerundet ist und in einer Mulde des Klemmkörpers (4, 5) liegt,
wobei der Druckkörper (11) bei eingeschwenktem Ansatz (8'') über den höchsten Druckpunkt von Ansatz (8'') und Druckkörper (11) in eine klemmende Rastposition bringbar ist.Height adjustment according to claim 6,
characterized by
that the pressure body (11) is pivotally mounted on one side on lateral pins (19) of the extension (8 '') of the lever (8) and is rounded on its other side and lies in a trough of the clamping body (4, 5) ,
wherein the pressure element (11) can be brought into a clamping detent position when the extension (8 '') is swung in over the highest pressure point of the extension (8 '') and pressure element (11).
dadurch gekennzeichnet,
daß zwischen einem oberen Bereich des Rückenlehnenträgers (2) und einem unteren Bereich des Befestigungselements (3) wenigstens eine Zugfeder (23) eingesetzt ist.Height adjustment according to claim 1,
characterized by
that at least one tension spring (23) is inserted between an upper region of the backrest support (2) and a lower region of the fastening element (3).
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 true EP0648452A2 (en) | 1995-04-19 |
| EP0648452A3 EP0648452A3 (en) | 1995-12-27 |
| EP0648452B1 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)
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3526430A (en) * | 1968-11-18 | 1970-09-01 | Art Metal Knoll Corp | Back height adjustment mechanism |
| US4616877A (en) * | 1985-05-09 | 1986-10-14 | Kimball International, Inc. | Chair with back height adjustment |
| US5007678A (en) * | 1989-10-11 | 1991-04-16 | Steelcase Inc. | Chair back height adjustment mechanism |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1336510A (en) * | 1918-12-19 | 1920-04-13 | Collier Keyworth Company | Chair-iron |
| 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 |
| US5035466A (en) * | 1989-04-03 | 1991-07-30 | Krueger International, Inc. | Ergonomic chair |
| 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 |
-
1993
- 1993-10-15 DE DE4335320A patent/DE4335320A1/en not_active Ceased
-
1994
- 1994-08-13 AT AT94112672T patent/ATE164047T1/en not_active IP Right Cessation
- 1994-08-13 EP EP94112672A patent/EP0648452B1/en not_active Expired - Lifetime
- 1994-08-13 DE DE59405465T patent/DE59405465D1/en not_active Expired - Fee Related
- 1994-08-13 DK DK94112672T patent/DK0648452T3/en active
- 1994-08-13 ES ES94112672T patent/ES2117742T3/en not_active Expired - Lifetime
- 1994-09-15 NO NO943437A patent/NO305971B1/en not_active IP Right Cessation
- 1994-09-28 AU AU74272/94A patent/AU665154B2/en not_active Ceased
- 1994-09-29 IL IL111089A patent/IL111089A/en not_active IP Right Cessation
- 1994-10-07 RU RU94036442A patent/RU2101994C1/en active
- 1994-10-13 FI FI944813A patent/FI944813A/en unknown
- 1994-10-13 TR TR01065/94A patent/TR28728A/en unknown
- 1994-10-13 CA CA002118076A patent/CA2118076C/en not_active Expired - Fee Related
- 1994-10-14 ZA ZA948057A patent/ZA948057B/en unknown
- 1994-10-17 US US08/324,000 patent/US5551754A/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3526430A (en) * | 1968-11-18 | 1970-09-01 | Art Metal Knoll Corp | Back height adjustment mechanism |
| US4616877A (en) * | 1985-05-09 | 1986-10-14 | Kimball International, Inc. | Chair with back height adjustment |
| US5007678A (en) * | 1989-10-11 | 1991-04-16 | Steelcase Inc. | Chair back height adjustment mechanism |
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 |
| EP0648452B1 (en) | 1998-03-18 |
| 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 |
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