EP1931231B1 - Retracting device - Google Patents

Retracting device Download PDF

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Publication number
EP1931231B1
EP1931231B1 EP06806860.0A EP06806860A EP1931231B1 EP 1931231 B1 EP1931231 B1 EP 1931231B1 EP 06806860 A EP06806860 A EP 06806860A EP 1931231 B1 EP1931231 B1 EP 1931231B1
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EP
European Patent Office
Prior art keywords
spring
springs
retracting device
driver
compression spring
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EP06806860.0A
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German (de)
French (fr)
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EP1931231A1 (en
Inventor
Andreas KÄTHLER
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Paul Hettich GmbH and Co KG
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Paul Hettich GmbH and Co KG
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B88/00—Drawers for tables, cabinets or like furniture; Guides for drawers
    • A47B88/40—Sliding drawers; Slides or guides therefor
    • A47B88/453—Actuated drawers
    • A47B88/46—Actuated drawers operated by mechanically-stored energy, e.g. by springs
    • A47B88/467—Actuated drawers operated by mechanically-stored energy, e.g. by springs self-closing
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B2210/00—General construction of drawers, guides and guide devices
    • A47B2210/0091—Drawer movement damping
    • A47B2210/0094—Drawer damping device with 2 relatively movable parts to convert kinetic energy

Definitions

  • the present invention relates to a collection device, in particular for drawers, with a housing on which a driver is guided, wherein the driver is movable from a retraction position to a parking position against a spring force, and the driver can be coupled with a furniture part to be closed to the Keep furniture part in a closed position.
  • a drawer closing device in which a self-closing mechanism is provided to hold a drawer in the closed position by the force of a spring.
  • a linearly movable driver is provided in a guide, which is pulled by a prestressed spring in an end position, while being held in an opposite parking position by tilting and locking a pin in an angled portion of a guideway.
  • the spring is fixed at one end to the movable carrier and at the other end to a housing or a furniture body.
  • the driver is biased by at least two springs in the retraction position, which are coupled together via a connecting piece.
  • the individual springs can be arranged in a compact design.
  • a cascaded arrangement of several springs is possible. This eliminates the need for deflections and the restoring forces can be minimized.
  • At least one spring is designed as a tension spring and at least one spring as a compression spring.
  • the resultant force can be provided to the driver by a tension spring and a compression spring, which ensures a particularly compact arrangement with a small space requirement, since compression spring and tension spring can be nested.
  • the springs are therefore arranged concentrically with each other.
  • the adjacent springs may each be wound in opposite directions to avoid jamming of the springs with each other.
  • the pressure spring is arranged around the tension spring. Then, the tension spring can be performed by the compression spring and protrude beyond the compression spring out into a housing in which the driver is guided. The connecting piece is then movably held by the compression spring and the tension spring, so that upon movement of the driver, the connecting piece is also moved.
  • the springs are arranged coaxially with each other.
  • the feeder is to be constructed of a few components, advantageously only two springs are present, namely a compression spring and a tension spring.
  • the tension spring may be fixed to the driver and the compression spring be supported on the side facing the driver on the housing.
  • clamping and locking mechanisms can be used.
  • the two springs are integrally wound from a wire, wherein a transition region between a train on a claimed and pressure on the area forms the connector, so that the assembly of the collection device is simplified to a few steps.
  • Feed device 1 shown comprises a housing 2 which is mountable to a furniture body or a fixed guide rail of a pull-out.
  • a cam guide 20 is formed with an angled end portion 21.
  • a driver 3 is guided, which has two bolts 4, which engage in the cam guide 20.
  • a receptacle 5 is formed for an activator, which can engage in the receptacle 5 to couple the driver 3 in the region of the cam guide 20 with a movable furniture part.
  • the driver 3 is biased in the left position by a compression spring 6 and a tension spring 7.
  • the compression spring 6 is supported on one side on the housing 2 and coupled on the opposite side with a connecting piece 9, which in turn is connected to the tension spring 7.
  • the tension spring 7 is connected on the opposite side to the connecting piece 9 with a connecting piece 8 with the driver 3.
  • the upper two feeders in FIG. 1 are formed according to the prior art, in which in the housing 2, a driver 3 is guided along a cam guide 20 and these components may be formed in a known manner.
  • a tension spring 10 is provided which is fixed on a side facing away from the driver 3 via an integrally formed connecting portion 11 and on the opposite side an integral connecting portion 12 is coupled to the driver 3.
  • the spring 10 in the relaxed state has a length L0 and is then biased to the length L1, so that a coupled to the driver 3 furniture part is biased in a closed position.
  • the spring constant R increases the force of the spring 10, when the spring is moved to the position with the length L2, in which the driver 3 has taken the path H.
  • the spring force F2 acts.
  • a compression spring 6 is provided on the outside, which surrounds a tension spring 7. Now, if the driver 3 is moved from the end position from left to right to the arcuate end 21 in the park position, the compression spring 6 is compressed while the tension spring 7 is tensioned. The connector 9 moves to the right by the amount h.
  • each of the two coupled springs 6 and 7 expands at about the same spring constant and a total deflection H only by H / 2, which also results in half the increase in power.
  • the two partial deflections H / 2 add up, as it were, through the coupling of the free ends to H.
  • the tension spring has extended, but the compression spring shortened - by the reverse direction of action add the two deflections.
  • the sum of elongation of the tension spring 7 and compression of the compression spring 6 results in the deflection H.
  • expansion and compression are adjusted so that they are approximately equal. Otherwise, one of the two springs would be more deflected, making the increase in power greater.
  • a biasing force F1 * F 1 is achieved in the retraction device according to the invention characterized in that the two springs 6 and 7 in the relaxed state have a different length, the compression spring 6 then compressed and the tension spring. 7 is stretched. If the springs are then installed, they brace against each other and provide the necessary preload F1 *.
  • the resulting restoring force F2 * is smaller than the force F2 according to the prior art and this also results in a total spring constant R *, which is correspondingly lower.
  • FIGS. 2A to 2C a collection device according to the invention is shown.
  • the compression spring 6 concentrically surrounds the tension spring 7, wherein a connecting piece 90 is provided, on which the compression spring 6 is supported.
  • the connecting piece 90 in this case forms a contact surface 15, which supports a winding of the compression spring 6 on the outer side.
  • the connecting piece 90 is connected to a coupling piece 9 of the tension spring 7.
  • a cylindrical guide tube 60 can be arranged between the compression spring 6 and the tension spring 7, in order to avoid kinking of the springs, so that the resulting forces act in the direction of movement of the driver 3.
  • the guide tube 60 can accordingly FIG. 2B are moved into a receptacle on the housing 2 when the driver 3 is in the extended position ( FIG. 2B ).
  • the housing 2 can also form a stop for the guide tube 60 in order to limit the maximum movement of the connecting piece 90.
  • the compression spring 6 and the tension spring 7 is formed as a helical spring. It is also possible to use other types of springs, such as coil springs, disc springs, crown springs, leaf springs, etc.
  • FIG. 3A a modified collection device is shown in the starting position, in which a compression spring 6 is arranged around a tension spring 7, wherein a connecting piece 9 connects them together on one side.
  • the compression spring 6 is no longer guided with an inner guide tube, but the guide takes place via a guide surface 22 of the housing 2, which prevents a deflection of the compression spring 6 down or to the side.
  • the guide surface 22 may be sleeve-shaped to support the compression spring 6 in all directions and to avoid lateral movement.
  • a damper 30 is provided on the driver 3, which is connected via a rod 31 to the driver 3. In a jerky movement of the driver 3 can thus be a damping.
  • FIG. 3B the collection device is shown in the extended position of the driver 3, in which the compression spring 6 is pressed together and the tension spring 7 is tensioned.
  • FIGS. 4A and 4B a spiral spring is shown, which may be formed as made of sheet metal flat crown spring 16.
  • the crown spring 16 is fixed on a side 17 and is helical, so that a central end portion 18 forms the opposite end of the crown spring 16 and is movable in a direction perpendicular to the plane of the flat crown spring 16.
  • a plurality of such crown springs 16 can be connected to each other via connecting pieces 19, so that over the crown springs 16, a comparatively large spring travel is realized.
  • a spring assembly can be constructed which has similar properties to the combination of crown springs 16 described above.
  • the springs 6 and 7 may protrude from the housing 2, so that the housing 2 can be made very compact, since it is not needed for tensioning a spring.
  • the springs 6 and 7 can be held via guide means, such as strips, pipes, etc., to avoid warping.
  • the driver is each fixed to a tension spring.
  • the driver 3 can act on a longitudinally guided compression spring 6, which is then coupled via a connecting piece 90 with a tension spring 7.
  • the spring assembly thus formed is arranged on the side of the cam guide 20 with the angled end portion, wherein the tension spring 7 is fixed on the opposite side to the connector 90 on the housing 2.
  • springs are shown. Of course, you can also nest four, six, eight or more springs and arrange them coaxially to reduce the increase in restoring forces.
  • the springs can also be arranged next to one another and coupled to one another in each case via suitable connecting means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)
  • Drawers Of Furniture (AREA)
  • Automotive Seat Belt Assembly (AREA)

Description

Die vorliegende Erfindung betrifft eine Einzugsvorrichtung, insbesondere für Schubladen, mit einem Gehäuse, an dem ein Mitnehmer geführt ist, wobei der Mitnehmer von einer Einzugsposition in eine Parkposition gegen eine Federkraft bewegbar ist, und der Mitnehmer mit einem zu schließenden Möbelteil koppelbar ist, um das Möbelteil in einer geschlossenen Position zu halten.The present invention relates to a collection device, in particular for drawers, with a housing on which a driver is guided, wherein the driver is movable from a retraction position to a parking position against a spring force, and the driver can be coupled with a furniture part to be closed to the Keep furniture part in a closed position.

Aus der EP 391 221 ist eine Schließvorrichtung für Schubladen bekannt, bei der ein Selbsteinzug vorgesehen ist, um eine Schublade durch die Kraft einer Feder in der geschlossenen Position zu halten bzw. dahin zu bringen. Hierfür ist in einer Führung ein linear beweglicher Mitnehmer vorgesehen, der durch eine vorgespannte Feder in eine Endstellung gezogen wird, während er in einer entgegengesetzten Parkposition durch Verkippen und Einrasten eines Zapfens in einen abgewinkelten Teil einer Führungsbahn gehalten wird. Die Feder ist dabei mit dem einen Ende am beweglichen Mitnehmer und mit dem anderen Ende an einem Gehäuse oder einem Möbelkorpus festgelegt. Nachteilig bei diesem Selbsteinzug ist, dass zum vollständigen Schließen des beweglichen Möbelteils nur eine Minimalkraft benötigt wird, beim Öffnen des Möbelteils die Feder jedoch weiter gespannt wird, sodass die Rückstellkraft ansteigt. Da die Rückstellkraft vom Anwender als Auszugskraft aufgebracht werden muss, wird sie als unangenehm empfunden und soll daher minimiert werden. Insbesondere ist der durch die Feder bedingte Zuwachs der wegabhängigen Kraft unnötig.From the EP 391,221 For example, there is known a drawer closing device in which a self-closing mechanism is provided to hold a drawer in the closed position by the force of a spring. For this purpose, a linearly movable driver is provided in a guide, which is pulled by a prestressed spring in an end position, while being held in an opposite parking position by tilting and locking a pin in an angled portion of a guideway. The spring is fixed at one end to the movable carrier and at the other end to a housing or a furniture body. A disadvantage of this self-closing is that only a minimum force is required for complete closing of the movable furniture part, however, when opening the furniture part, the spring is still stretched, so that the restoring force increases. Since the restoring force must be applied by the user as a pull-out force, it is perceived as unpleasant and should therefore be minimized. In particular, the increment of the path-dependent force caused by the spring is unnecessary.

Aus der DE 20 2004 005 322 ist eine Einzugsautomatik für Schubladen-Ausziehführungen bekannt, bei der eine längere Feder eingesetzt wird, die um eine Umlenkeinrichtung geführt ist, sodass die Rückstellkräfte aufgrund der längeren Feder etwas geringer sind. Allerdings ist bei dieser Gestaltung nachteilig, dass aufgrund der Umlenkung zusätzliche Reibungskräfte auf die Feder wirken und weiterer Bauraum quer zur Längsrichtung der Anordnung der Einzugsautomatik notwendig ist. Zudem ist die Einzugsautomatik vergleichsweise aufwendig herzustellen.From the DE 20 2004 005 322 a draw-in mechanism for drawer pull-out is known in which a longer spring is used, which is guided around a deflection, so that the restoring forces are slightly lower due to the longer spring. However, it is disadvantageous in this design that act due to the deflection additional frictional forces on the spring and further space transverse to the longitudinal direction of the arrangement of the automatic retraction is necessary. In addition, the automatic feed is comparatively expensive to produce.

Es ist daher Aufgabe der vorliegenden Erfindung eine Einzugsvorrichtung zu schaffen, die nur geringe wegabhängige zusätzliche Rückstellkräfte besitzt und kompakt aufgebaut ist.It is therefore an object of the present invention to provide a retraction device, which has only small path-dependent additional restoring forces and is compact.

Diese Aufgabe wird mit einer Einzugsvorrichtung mit den Merkmalen des Anspruches 1 gelöst.This object is achieved with a collection device having the features of claim 1.

Erfindungsgemäß ist der Mitnehmer durch mindestens zwei Federn in die Einzugsposition vorgespannt, die über ein Verbindungsstück miteinander gekoppelt sind. Durch den Einsatz getrennter Federn ist es möglich, einen großen Federweg bereitzustellen, wobei die einzelnen Federn sich in kompakter Bauweise anordnen lassen. Insbesondere ist eine kaskadierte Anordnung mehrerer Federn möglich. Dadurch entfällt die Notwendigkeit von Umlenkungen und die Rückstellkräfte können minimiert werden.According to the invention, the driver is biased by at least two springs in the retraction position, which are coupled together via a connecting piece. By using separate springs, it is possible to provide a large spring travel, wherein the individual springs can be arranged in a compact design. In particular, a cascaded arrangement of several springs is possible. This eliminates the need for deflections and the restoring forces can be minimized.

Gemäß einer bevorzugten Ausgestaltung der Erfindung ist mindestens eine Feder als Zugfeder und mindestens eine Feder als Druckfeder ausgebildet. Dadurch kann die resultierende Kraft auf den Mitnehmer durch eine Zugfeder und eine Druckfeder bereitgestellt werden, was zu einer besonders kompakten Anordnung bei geringem Raumbedarf sorgt, da Druckfeder und Zugfeder ineinander geschachtelt werden können. Vorzugsweise sind die Federn daher konzentrisch zueinander angeordnet. Bei einem Einsatz von Schraubenfedern können die benachbarten Federn jeweils gegensinnig gewickelt sein, um ein Verklemmen der Federn untereinander zu vermeiden.According to a preferred embodiment of the invention, at least one spring is designed as a tension spring and at least one spring as a compression spring. Thereby, the resultant force can be provided to the driver by a tension spring and a compression spring, which ensures a particularly compact arrangement with a small space requirement, since compression spring and tension spring can be nested. Preferably, the springs are therefore arranged concentrically with each other. When using coil springs, the adjacent springs may each be wound in opposite directions to avoid jamming of the springs with each other.

Besonders vorteilhaft ist es, wenn die Druckfeder um die Zugfeder angeordnet ist. Dann kann die Zugfeder durch die Druckfeder durchgeführt sein und über die Druckfeder hinaus in ein Gehäuse hineinragen, in dem der Mitnehmer geführt ist. Das Verbindungsstück ist dann durch die Druckfeder und die Zugfeder beweglich gehalten, sodass bei einer Bewegung des Mitnehmers das Verbindungsstück ebenfalls bewegt wird. Für eine besonders kompakte Bauweise sind die Federn koaxial zueinander angeordnet.It is particularly advantageous if the pressure spring is arranged around the tension spring. Then, the tension spring can be performed by the compression spring and protrude beyond the compression spring out into a housing in which the driver is guided. The connecting piece is then movably held by the compression spring and the tension spring, so that upon movement of the driver, the connecting piece is also moved. For a particularly compact design, the springs are arranged coaxially with each other.

Wenn die Einzugsvorrichtung aus wenigen Bauteilen aufgebaut sein soll, sind vorteilhaft nur zwei Federn vorhanden, nämlich eine Druckfeder und eine Zugfeder. Dabei kann die Zugfeder an dem Mitnehmer festgelegt sein und die Druckfeder auf der zum Mitnehmer gewandten Seite am Gehäuse abgestützt sein. Zur Befestigung können bekannte Klemm- und Rastmechanismen eingesetzt werden.If the feeder is to be constructed of a few components, advantageously only two springs are present, namely a compression spring and a tension spring. In this case, the tension spring may be fixed to the driver and the compression spring be supported on the side facing the driver on the housing. For fixing known clamping and locking mechanisms can be used.

Ferner ist es in einer weiteren Ausgestaltung der Erfindung möglich, mindestens eine Spiralfeder vorzusehen, deren Wickelradius ansteigt und/oder abnimmt. Dadurch kann auf geringem Bauraum ein vergleichsweise großer Federweg erzielt werden. Es können auch mehrere Spiralfedern hintereinander geschaltet werden.Furthermore, it is possible in a further embodiment of the invention to provide at least one spiral spring whose winding radius increases and / or decreases. This allows a comparatively large travel can be achieved in a small space. It can also be switched several coil springs in a row.

Für eine besonders einfache Ausgestaltung der Einzugsvorrichtung sind die zwei Federn integral aus einem Draht gewickelt, wobei ein Übergangsbereich zwischen einem auf Zug und einem auf Druck beanspruchten Bereich das Verbindungsstück bildet, sodass die Montage der Einzugsvorrichtung auf wenige Schritte vereinfacht wird.For a particularly simple embodiment of the collection device, the two springs are integrally wound from a wire, wherein a transition region between a train on a claimed and pressure on the area forms the connector, so that the assembly of the collection device is simplified to a few steps.

Die Erfindung wird nachfolgend anhand mehrerer Ausführungsbeispiele mit Bezug auf die beigefügten Zeichnungen näher erläutert. Es zeigen:

Figur 1
eine schematische Ansicht einer Einzugsvorrichtung nach der Erfindung verglichen mit einer Einzugsvorrichtung nach dem Stand der Technik;
Figur 2 A, B, C
Ansichten einer erfindungsgemäßen Einzugsvorrichtung;
Figur 3 A + B
zwei perspektivische Ansichten einer modifizierten Einzugsvorrichtung in unterschiedlichen Positionen;
Figur 4A und B
zwei Ansichten einer Spiralfeder für eine erfindungsgemäße Einzugsvorrichtung;
Figur 5
eine schematische Ansicht einer Einzugsvorrichtung mit Spiralfedern, und
Figur 6
eine Ansicht einer modifizierten Ausführungsform der Einzugsvorrichtung.
The invention will be explained in more detail with reference to several embodiments with reference to the accompanying drawings. Show it:
FIG. 1
a schematic view of a collection device according to the invention compared with a collection device according to the prior art;
Figure 2 A, B, C
Views of a collection device according to the invention;
Figure 3 A + B
two perspective views of a modified collection device in different positions;
FIGS. 4A and B
two views of a coil spring for a feed device according to the invention;
FIG. 5
a schematic view of a collection device with coil springs, and
FIG. 6
a view of a modified embodiment of the collection device.

Eine im unteren Bereich der Figur 1 dargestellte Einzugsvorrichtung 1 umfasst ein Gehäuse 2, das an einem Möbelkorpus oder einer feststehenden Führungsschiene einer Ausziehführung montierbar ist. In dem Gehäuse 2 ist eine Kurvenführung 20 mit einem abgewinkelten Endabschnitt 21 ausgebildet. In der Kurvenführung 20 ist ein Mitnehmer 3 geführt, der zwei Bolzen 4 aufweist, die in die Kurvenführung 20 eingreifen. An dem Mitnehmer 3 ist eine Aufnahme 5 für einen Aktivator ausgebildet, der in die Aufnahme 5 eingreifen kann um den Mitnehmer 3 in dem Bereich der Kurvenführung 20 mit einem bewegbaren Möbelteil zu koppeln.One at the bottom of the FIG. 1 Feed device 1 shown comprises a housing 2 which is mountable to a furniture body or a fixed guide rail of a pull-out. In the housing 2, a cam guide 20 is formed with an angled end portion 21. In the cam guide 20, a driver 3 is guided, which has two bolts 4, which engage in the cam guide 20. On the driver 3, a receptacle 5 is formed for an activator, which can engage in the receptacle 5 to couple the driver 3 in the region of the cam guide 20 with a movable furniture part.

Der Mitnehmer 3 ist in die linke Position durch eine Druckfeder 6 und eine Zugfeder 7 vorgespannt. Die Druckfeder 6 ist auf einer Seite am Gehäuse 2 abgestützt und auf der gegenüberliegenden Seite mit einem Verbindungsstück 9 gekoppelt, das wiederum mit der Zugfeder 7 verbunden ist. Die Zugfeder 7 ist auf der zum Verbindungsstück 9 gegenüberliegenden Seite mit einem Verbindungsstück 8 mit dem Mitnehmer 3 verbunden.The driver 3 is biased in the left position by a compression spring 6 and a tension spring 7. The compression spring 6 is supported on one side on the housing 2 and coupled on the opposite side with a connecting piece 9, which in turn is connected to the tension spring 7. The tension spring 7 is connected on the opposite side to the connecting piece 9 with a connecting piece 8 with the driver 3.

Die oberen beiden Einzugsvorrichtungen in Figur 1 sind gemäß dem Stand der Technik ausgebildet, bei dem in dem Gehäuse 2 ein Mitnehmer 3 entlang einer Kurvenführung 20 geführt ist und diese Bauteile in bekannter Weise ausgebildet sein können. Beim Stand der Technik ist lediglich eine Zugfeder 10 vorgesehen, die auf einer vom Mitnehmer 3 abgewandten Seite über einen integral ausgebildeten Verbindungsabschnitt 11 festgelegt ist und an der gegenüberliegenden Seite ein integraler Verbindungsabschnitt 12 an dem Mitnehmer 3 gekoppelt ist.The upper two feeders in FIG. 1 are formed according to the prior art, in which in the housing 2, a driver 3 is guided along a cam guide 20 and these components may be formed in a known manner. In the prior art, only a tension spring 10 is provided which is fixed on a side facing away from the driver 3 via an integrally formed connecting portion 11 and on the opposite side an integral connecting portion 12 is coupled to the driver 3.

Nach dem Stand der Technik hat die Feder 10 im entspannten Zustand eine Länge L0 und wird dann auf die Länge L1 vorgespannt, sodass ein mit dem Mitnehmer 3 gekoppeltes Möbelteil in eine geschlossene Position vorgespannt wird. Abhängig von der Federkonstanten R steigt dann die Kraft der Feder 10 an, wenn die Feder in die Position mit der Länge L2 bewegt wird, in der der Mitnehmer 3 den Weg H beschritten hat. Dadurch wirkt die Federkraft F2.According to the prior art, the spring 10 in the relaxed state has a length L0 and is then biased to the length L1, so that a coupled to the driver 3 furniture part is biased in a closed position. Depending on the spring constant R then increases the force of the spring 10, when the spring is moved to the position with the length L2, in which the driver 3 has taken the path H. As a result, the spring force F2 acts.

Bei der Einzugsvorrichtung nach der Erfindung ist außen eine Druckfeder 6 vorgesehen, die eine Zugfeder 7 umgibt. Wird nun der Mitnehmer 3 aus der Endposition von links nach rechts zu dem bogenförmigen Endstück 21 in die Parkposition bewegt, wird die Druckfeder 6 zusammengedrückt, während die Zugfeder 7 gespannt wird. Das Verbindungsstück 9 bewegt sich nach rechts um den Betrag h.In the retraction device according to the invention, a compression spring 6 is provided on the outside, which surrounds a tension spring 7. Now, if the driver 3 is moved from the end position from left to right to the arcuate end 21 in the park position, the compression spring 6 is compressed while the tension spring 7 is tensioned. The connector 9 moves to the right by the amount h.

Die dargestellte Federlänge L1* ist dabei die Länge einer (fiktiven) einfachen Zugfeder, die äquivalenten zu den mechanisch gekoppelten beiden Federn 6 und 7 ist, die im Idealfall (gleiche Federkonstante) etwa doppelt so lang ist und daher die Baulänge vergrößert. Wird nun eine Auslenkung H durchgeführt, so würde sich die äquivalente Feder der Länge L1* um H dehnen und somit die Länge L2* haben, aufgrund ihrer doppelten Länge ergibt sich der halbe Zuwachs an Rückstellkraft (= flachere Kennlinie). L2* ist also L1* plus H (L2* = L1* + H).The illustrated spring length L1 * is the length of a (fictional) simple tension spring, which is equivalent to the mechanically coupled two springs 6 and 7, which in the ideal case (same spring constant) is about twice as long and therefore increases the overall length. If a deflection H is now carried out, then the equivalent spring of length L1 * would stretch by H and thus have the length L2 *, because of its double length, this results in half the increase in restoring force (= flatter characteristic). L2 * is thus L1 * plus H (L2 * = L1 * + H).

Nach der Erfindung dehnt sich jede der beiden gekoppelten Federn 6 und 7 bei etwa gleicher Federkonstante und einer Gesamtauslenkung H nur um H/2, woraus ebenfalls der halbe Kraftzuwachs resultiert. Die beiden Teilauslenkungen H/2 addieren sich quasi durch die Kopplung der freien Enden zu H. Die Länge der äquivalenten fiktiven Zugfeder ist nun L 2 * = L 2 Zug + L 2 Druck + H .

Figure imgb0001
According to the invention, each of the two coupled springs 6 and 7 expands at about the same spring constant and a total deflection H only by H / 2, which also results in half the increase in power. The two partial deflections H / 2 add up, as it were, through the coupling of the free ends to H. The length of the equivalent fictitious tension spring is now L 2 * = L 2 train + L 2 print + H ,
Figure imgb0001

Dabei hat sich die Zugfeder verlängert, die Druckfeder aber verkürzt - durch die umgekehrte Wirkrichtung addieren sich die beiden Auslenkungen. Die Summe aus Dehnung der Zugfeder 7 und Stauchung der Druckfeder 6 ergibt die Auslenkung H. Für eine optimale Auslegung werden Dehnung und Stauchung so eingestellt, dass sie etwa gleich sind. Anderenfalls würde eine der beiden Federn stärker ausgelenkt, wodurch der Kraftzuwachs größer ausfiele.In this case, the tension spring has extended, but the compression spring shortened - by the reverse direction of action add the two deflections. The sum of elongation of the tension spring 7 and compression of the compression spring 6 results in the deflection H. For optimum design, expansion and compression are adjusted so that they are approximately equal. Otherwise, one of the two springs would be more deflected, making the increase in power greater.

Eine Vorspannkraft F1* = F 1 wird bei der erfindungsgemäßen Einzugsvorrichtung dadurch erreicht, dass die beiden Federn 6 und 7 im entspannten Zustand eine andere Länge aufweisen, wobei die Druckfeder 6 dann gestaucht und die Zugfeder 7 gedehnt wird. Werden die Federn dann verbaut, so verspannen sie sich gegeneinander und sorgen für die notwendige Vorspannkraft F1*.A biasing force F1 * = F 1 is achieved in the retraction device according to the invention characterized in that the two springs 6 and 7 in the relaxed state have a different length, the compression spring 6 then compressed and the tension spring. 7 is stretched. If the springs are then installed, they brace against each other and provide the necessary preload F1 *.

Die resultierende Rückstellkraft F2* ist kleiner als die Kraft F2 nach dem Stand der Technik und es ergibt sich dadurch auch eine Gesamtfederkonstante R*, die entsprechend geringer ist.The resulting restoring force F2 * is smaller than the force F2 according to the prior art and this also results in a total spring constant R *, which is correspondingly lower.

Die Federn 6 und 7 könnten mit unterschiedlichen Federkonstanten ausgeführt sein, sodass sich die Kraft- und Wegverhältnisse im Verhältnis der Federkonstanten ändern. Optimal ist es jedoch, die Federn gleich auszulegen, da sich dann die Auslenkungen (= Dehnungen) gleich verteilen, sodass ein Kraftzuwachs minimiert wird.The springs 6 and 7 could be designed with different spring constants, so that change the force and displacement in the ratio of the spring constant. It is optimal, however, to design the springs the same, because then the deflections (= expansions) are distributed equally, so that an increase in force is minimized.

In den Figuren 2A bis 2C ist eine erfindungsgemäße Einzugsvorrichtung dargestellt. Die Druckfeder 6 umgibt konzentrisch die Zugfeder 7, wobei ein Verbindungsstück 90 vorgesehen ist, an dem die Druckfeder 6 abgestützt ist. Das Verbindungsstück 90 bildet hierbei eine Anlagefläche 15 aus, die an der äußeren Seite eine Wicklung der Druckfeder 6 abstützt. An der Innenseite ist das Verbindungsstück 90 mit einem Kupplungsstück 9 der Zugfeder 7 verbunden.In the FIGS. 2A to 2C a collection device according to the invention is shown. The compression spring 6 concentrically surrounds the tension spring 7, wherein a connecting piece 90 is provided, on which the compression spring 6 is supported. The connecting piece 90 in this case forms a contact surface 15, which supports a winding of the compression spring 6 on the outer side. On the inside, the connecting piece 90 is connected to a coupling piece 9 of the tension spring 7.

Zwischen der Druckfeder 6 und der Zugfeder 7 kann dabei ein zylindrisches Führungsrohr 60 angeordnet sein, um ein Abknicken der Federn zu vermeiden, so dass die resultierenden Kräfte in Bewegungsrichtung des Mitnehmers 3 wirken. Das Führungsrohr 60 kann entsprechend Figur 2B in eine Aufnahme an dem Gehäuse 2 hinein bewegt werden, wenn der Mitnehmer 3 in der ausgezogenen Position ist (Figur 2B). Bei Bedarf kann das Gehäuse 2 auch einen Anschlag für das Führungsrohr 60 ausbilden, um die maximale Bewegung des Verbindungsstückes 90 zu begrenzen.In this case, a cylindrical guide tube 60 can be arranged between the compression spring 6 and the tension spring 7, in order to avoid kinking of the springs, so that the resulting forces act in the direction of movement of the driver 3. The guide tube 60 can accordingly FIG. 2B are moved into a receptacle on the housing 2 when the driver 3 is in the extended position ( FIG. 2B ). If necessary, the housing 2 can also form a stop for the guide tube 60 in order to limit the maximum movement of the connecting piece 90.

In Figur 1 und 2 ist die Druckfeder 6 und die Zugfeder 7 als Schraubenfeder ausgebildet. Es ist auch möglich, andere Federtypen, wie Spiralfedern, Tellerfedern, Kronenfedern, Blattfedern etc. einzusetzen.In FIG. 1 and 2 the compression spring 6 and the tension spring 7 is formed as a helical spring. It is also possible to use other types of springs, such as coil springs, disc springs, crown springs, leaf springs, etc.

In der Figur 3A ist eine modifizierte Einzugsvorrichtung in der Ausgangsposition dargestellt, bei der eine Druckfeder 6 um eine Zugfeder 7 angeordnet ist, wobei ein Verbindungsstück 9 diese an einer Seite miteinander verbindet. Die Druckfeder 6 ist dabei nicht mehr mit einem innen liegenden Führungsrohr geführt, sondern die Führung findet über eine Führungsfläche 22 des Gehäuses 2 statt, die eine Durchbiegung der Druckfeder 6 nach unten oder zur Seite verhindert. Die Führungsfläche 22 kann dabei hülsenförmig ausgebildet sein, um die Druckfeder 6 in alle Richtungen zu stützen und eine seitliche Bewegung zu vermeiden.In the FIG. 3A a modified collection device is shown in the starting position, in which a compression spring 6 is arranged around a tension spring 7, wherein a connecting piece 9 connects them together on one side. The compression spring 6 is no longer guided with an inner guide tube, but the guide takes place via a guide surface 22 of the housing 2, which prevents a deflection of the compression spring 6 down or to the side. The guide surface 22 may be sleeve-shaped to support the compression spring 6 in all directions and to avoid lateral movement.

Ferner ist an dem Mitnehmer 3 ein Dämpfer 30 vorgesehen, der über eine Stange 31 mit dem Mitnehmer 3 verbunden ist. Bei einer ruckartigen Bewegung des Mitnehmers 3 kann somit eine Dämpfung erfolgen.Further, a damper 30 is provided on the driver 3, which is connected via a rod 31 to the driver 3. In a jerky movement of the driver 3 can thus be a damping.

In Figur 3B ist die Einzugsvorrichtung in der ausgezogenen Position des Mitnehmers 3 gezeigt, in der die Druckfeder 6 zusammen gedrückt und die Zugfeder 7 gespannt ist.In FIG. 3B the collection device is shown in the extended position of the driver 3, in which the compression spring 6 is pressed together and the tension spring 7 is tensioned.

In Figur 4A und 4B ist eine Spiralfeder gezeigt, die als aus Blech gefertigte flache Kronenfeder 16 ausgebildet sein kann. Die Kronenfeder 16 ist auf einer Seite 17 festgelegt und ist schneckenförmig ausgebildet, sodass ein mittiger Endabschnitt 18 das gegenüberliegende Ende der Kronenfeder 16 ausbildet und in eine Richtung senkrecht zu Ebene der flachen Kronenfeder 16 bewegbar ist.In FIGS. 4A and 4B a spiral spring is shown, which may be formed as made of sheet metal flat crown spring 16. The crown spring 16 is fixed on a side 17 and is helical, so that a central end portion 18 forms the opposite end of the crown spring 16 and is movable in a direction perpendicular to the plane of the flat crown spring 16.

Wie in Figur 5 gezeigt ist, können mehrere solcher Kronenfedern 16 über Verbindungsstücke 19 miteinander verbunden werden, sodass über die Kronenfedern 16 ein vergleichsweise großer Federweg realisierbar ist. Durch Kopplung mehrerer Kronenfedern 16 abwechselnd außen und innen lässt sich ein Federpaket aufbauen, das ähnliche Eigenschaften aufweist wie die zuvor beschriebene Kombination von Kronenfedern 16.As in FIG. 5 is shown, a plurality of such crown springs 16 can be connected to each other via connecting pieces 19, so that over the crown springs 16, a comparatively large spring travel is realized. By coupling a plurality of crown springs 16 alternately outside and inside, a spring assembly can be constructed which has similar properties to the combination of crown springs 16 described above.

In Figur 5 ist das Federpaket aus Kronenfedern 16 in einer Druckfeder 6 gelagert. Dadurch wird der zur Verfugung stehende Bauraum optimal genutzt.In FIG. 5 the spring assembly of crown springs 16 is mounted in a compression spring 6. As a result, the available space is used optimally.

Es ist grundsätzlich auch möglich, drei oder mehr Federn in einer Einzugsvorrichtung miteinander zu verbinden, um die Federeigenschaften optimal auszunutzen. Für eine einfache Ausgestaltung ist es auch möglich, wenn eine Feder einen auf Druck belasteten Bereich und einen auf Zug belasteten Bereich aufweist, sodass ein Übergang zwischen den beiden Bereichen als Verbindungsstück ausgebildet ist. Dadurch wird die Montage besonders einfach gestaltet, da nur eine minimale Anzahl an Bauteilen vorzusehen ist.It is also possible in principle to connect three or more springs together in a collection device in order to optimally utilize the spring properties. For a simple embodiment, it is also possible if a spring has a pressure-loaded area and a loaded area to train, so that a transition between the two areas is designed as a connecting piece. As a result, the assembly is particularly simple, since only a minimum number of components is provided.

Die Federn 6 und 7 können von dem Gehäuse 2 hervorstehen, so dass das Gehäuse 2 sehr kompakt ausgeführt sein kann, da es nicht zum Spannen einer Feder benötigt wird. Die Federn 6 und 7 können dabei über Führungsmittel, wie Leisten, Rohre etc. gehalten sein, um ein Verkrümmen zu vermeiden.The springs 6 and 7 may protrude from the housing 2, so that the housing 2 can be made very compact, since it is not needed for tensioning a spring. The springs 6 and 7 can be held via guide means, such as strips, pipes, etc., to avoid warping.

In den gezeigten Ausführungsbeispielen ist der Mitnehmer jeweils an einer Zugfeder festgelegt. Wie in Figur 6 zu sehen ist, kann der Mitnehmer 3 auf eine in Längsrichtung geführte Druckfeder 6 wirken, die dann über ein Verbindungsstück 90 mit einer Zugfeder 7 gekoppelt ist. Das so gebildete Federpaket ist auf Seite der Kurvenführung 20 mit dem abgewinkelten Endabschnitt angeordnet, wobei die Zugfeder 7 auf der zum Verbindungsstück 90 gegenüberliegenden Seite an dem Gehäuse 2 festgelegt ist.In the illustrated embodiments, the driver is each fixed to a tension spring. As in FIG. 6 can be seen, the driver 3 can act on a longitudinally guided compression spring 6, which is then coupled via a connecting piece 90 with a tension spring 7. The spring assembly thus formed is arranged on the side of the cam guide 20 with the angled end portion, wherein the tension spring 7 is fixed on the opposite side to the connector 90 on the housing 2.

Ferner sind nur jeweils zwei koaxial zueinander angeordnete Federn gezeigt. Man kann natürlich auch vier, sechs acht oder mehr Federn ineinander schachteln und koaxial anordnen, um den Zuwachs der Rückstellkräfte zu reduzieren. Zudem können die Federn auch nebeneinander angeordnet sein und an einer Seite jeweils über geeignete Verbindungsmittel aneinander gekoppelt sein.Furthermore, only two coaxially arranged springs are shown. Of course, you can also nest four, six, eight or more springs and arrange them coaxially to reduce the increase in restoring forces. In addition, the springs can also be arranged next to one another and coupled to one another in each case via suitable connecting means.

Claims (13)

  1. A retracting device, in particular for drawers, having a housing (2), on which a driver (3) is guided, the driver (3) being movable from a retracted position into a parking position against a spring force, and the driver (3) being able to be coupled to a furniture part to be closed in order to hold the furniture part in a closed position, the driver (3) being pretensioned by least two springs (6, 7, 16) in the retracted position, which are coupled to one another via a connection part (9, 9', 90), characterized in that at least two springs (6, 7, 16) are positioned inserted one inside the other.
  2. The retracting device according to Claim 1, characterized in that at least one spring is implemented as a tension spring (7, 16) and at least one spring is implemented as a compression spring (6).
  3. The retracting device according to Claim 1 or 2, characterized in that a compression spring (6) is positioned around a tension spring. (7), which are coupled to one another on one end via a connection part (9, 9', 90).
  4. The retracting device according to one of Claims 1 through 3, characterized in that the springs (6, 7, 16) are positioned coaxially to one another.
  5. The retracting device according to one of Claims 1 through 4, characterized in that the springs (6, 7, 16) are implemented as coiled springs and adjacent springs each have opposite windings.
  6. The retracting device according to one of Claims 1 through 5, characterized in that two springs are provided and one spring is implemented as a tension spring (7) and one spring is implemented as a compression spring (6).
  7. The retracting device according to one of Claims 1 through 6, characterized in that the tension spring (7, 16) is fixed on the driver (3) and the compression spring (6) is supported on a housing (2) on the side facing toward the driver (3).
  8. The retracting device according to Claim 7, characterized in that the spring constants of the tension spring (7) and the compression spring (6) are approximately equal, so that the deflection of both springs (6, 7) upon a movement of the driver (3) is approximately equally large.
  9. The retracting device according to one of Claims 1 through 8, characterized in that at least one crown spring (16) is provided, whose winding radius increases and/or decreases.
  10. The retracting device according to Claim 9, characterized in that multiple crown springs (16) connected one behind another are provided.
  11. The retracting device according to one of Claims 1 through 10, characterized in that two springs (6, 7) are wound integrally from one wire, a transition area between an area loaded with traction and an area loaded with pressure forming the connection part.
  12. The retracting device according to one of Claims 1 through 11, characterized in that a guide element (22, 60) is provided for the compression spring (6) to avoid a sag downward in the various positions.
  13. The retracting device according to Claim 12, characterized in that a guide sleeve (22) for the compression spring (6) is implemented integrally with a housing (2).
EP06806860.0A 2005-10-04 2006-09-28 Retracting device Active EP1931231B1 (en)

Applications Claiming Priority (2)

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DE202005015529U DE202005015529U1 (en) 2005-10-04 2005-10-04 retraction device
PCT/EP2006/066830 WO2007039541A1 (en) 2005-10-04 2006-09-28 Retracting device

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EP1931231A1 EP1931231A1 (en) 2008-06-18
EP1931231B1 true EP1931231B1 (en) 2017-06-21

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KR (1) KR101315920B1 (en)
CN (1) CN101277631B (en)
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RU2396065C2 (en) 2010-08-10
WO2007039541A1 (en) 2007-04-12
DE202005015529U1 (en) 2007-02-15
ES2640863T3 (en) 2017-11-07
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JP2009509707A (en) 2009-03-12
RU2008115358A (en) 2009-11-10

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