EP0190626A2 - Tilting device for Venetian blinds - Google Patents

Tilting device for Venetian blinds Download PDF

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Publication number
EP0190626A2
EP0190626A2 EP86100979A EP86100979A EP0190626A2 EP 0190626 A2 EP0190626 A2 EP 0190626A2 EP 86100979 A EP86100979 A EP 86100979A EP 86100979 A EP86100979 A EP 86100979A EP 0190626 A2 EP0190626 A2 EP 0190626A2
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EP
European Patent Office
Prior art keywords
wrap spring
spring
ring element
turning device
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP86100979A
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German (de)
French (fr)
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EP0190626A3 (en
EP0190626B1 (en
Inventor
Petrus Johannes Hennequin
Dirk Alxander Ploeg
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Hunter Douglas Industries BV
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Hunter Douglas Industries BV
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Priority to AT86100979T priority Critical patent/ATE48886T1/en
Publication of EP0190626A2 publication Critical patent/EP0190626A2/en
Publication of EP0190626A3 publication Critical patent/EP0190626A3/en
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Publication of EP0190626B1 publication Critical patent/EP0190626B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/303—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable with ladder-tape
    • E06B9/307—Details of tilting bars and their operation

Definitions

  • the invention relates to a turning device for a louvre blind, with a drive shaft surrounding, on this directly or indirectly via a non-rotatable coupling sleeve, at least under load, frictionally mounted wrap spring, each with an end turn of the wrap spring bent outwards, with a for holding the lamellae serving conductors are connected, and with fixed counter-stops, on which one or the other wrap spring end comes to rest when the drive shaft rotates and brings about a reduction in the frictional engagement.
  • the wrap spring is carried along by the rotary movement of the drive shaft until one of the two wrap spring ends bears against the associated counterstop and a driving torque still exerted on the wrap spring causes the wrap spring to open, ie to increase the diameter.
  • a driving torque still exerted on the wrap spring causes the wrap spring to open, ie to increase the diameter.
  • the frictional engagement between the wrap spring and the drive shaft or the coupling sleeve is reduced to a very small value.
  • one end generally engages one end of a conductor consisting of a cord, a chain or a band and used to carry the slats.
  • the conductor ends are designed as closed eyelets and the wrap spring ends as hooks into which the eyelets can be hung.
  • Another turning device is also known in which the conductor ends are not attached directly to the ends of the wrap spring. Rather, a ring element is associated with each wrap spring end, which surrounds the wrap spring in the end region and which receives the wrap spring end bent radially outwards in a bore. At a suitable point on its circumference, the ring element has a stop projecting radially outwards, which serves both for cooperation with the counter-stop and for fastening the associated conductor end.
  • the ring element is therefore switched into the force transmission path between the wrap spring end and the conductor. While it can essentially prevent permanent wrap spring deformation, but the disadvantage of a relatively large effort for the manufacture or assembly must be accepted. This effort is partly due to the fact that it is relatively difficult to insert a wrap spring end bent radially outwards from the inside of the ring element into a radial bore located therein. On the other hand, the attachment of a conductor end is carried out in such a way that an approximately tangential bore is provided in the stop, through which the conductor end must be passed in a relatively cumbersome manner in order to be able to be subsequently locked by means of a knot or in another suitable manner. A further disadvantage is that when each ring element is installed, the position of the ring element must be adapted to the position of the wrap spring end on the one hand and the counter-stop on the other.
  • the end windings each have a ring element which can be taken through one of the wrap spring ends in the direction of rotation and is not involved in the force transmission between wrap spring and conductor and which is provided at one point on its circumference with a recess penetrated by the wrap spring end, and that the ring element surrounds the respective end turn of the wrap spring with such a game that without interference tiung the spring function a permanent deformation resulting in the wrap spring deflection is prevented.
  • the ring element is now not involved in the power transmission, so that its training or dimensioning must be based solely on the existing conditions for the fulfillment of the support function.
  • the recess in the ring element according to the invention need not be designed as a narrow bore, because the ring element is not involved in the power transmission between the wrap spring and the conductor.
  • a correspondingly larger dimensioning of the recess is sufficient for the fulfillment of the support function and at the same time facilitates the insertion of the wrap spring end into the recess, if the recess is not open at least on one side according to an embodiment of the invention to be described later.
  • the rotational position of the ring element adjusts itself automatically as a function of the respective rotational movement of the associated wrap spring end and that, on the one hand, direct support of the spring end bent radially outwards and also a support of the spring coils surrounded by the ring element in one takes place in such a way that they cannot expand radially outwards.
  • the spring end first in the radial direction to the loop spring circumference and then bent back in the circumferential direction and that the circumferential part of the spring end is overlapped on its outside by the ring element, preferably by means of a web.
  • the part of the ring element in question can be appropriately recessed to accommodate the part which is bent back in the circumferential direction, or else can be provided with a web which may also protrude from the outer circumference of the ring element.
  • the assembly of a ring element on the wrap spring is, as already mentioned, simplified according to the invention in that the recess is open at least on one end face of the ring element.
  • the ring element can therefore be pushed in the axial direction onto the side of the wrap spring facing it.
  • the ring element does not need to be closed over the entire circumference, because the recess can also be formed by a slot that is continuous in the axial direction.
  • a ring element on one side has an inwardly extending ring flange and is supported by the ring flange next to the wrap spring on the drive shaft or a coupling sleeve surrounding it without rotation. Since the ring element is intended to surround the wrap spring without rotation, play of a certain minimum size will always have to be provided between the wrap spring circumference and the ring element. With the help of the ring flange a more stable mounting of the ring element can be achieved.
  • the ring element has a radially outwardly projecting flange on its axially outwardly facing side. Under certain operating conditions, this can serve as a guide for the conductors attached to the wrap spring ends.
  • the Rir.ilemente extend to the wrap spring area lying between the spring ends and are supported on each other.
  • the ring elements are guided or locked in one axial direction. This measure is particularly advantageous if ring elements provided with an annular flange are used, since the annular flange then respectively locks or supports in the other axial direction.
  • one of the end faces of the ring element facing one another is provided with a groove and the other end side is provided with one or more guide elements engaging in the groove. This ensures that the ring elements maintain a coaxial position with one another, the freedom of rotation of course not being impaired by the engagement of the guide elements in the groove.
  • the guide elements can be formed by an annular spring.
  • the blind drive has a housing 10 in which a hub 11 is rotatably mounted and can be driven by a drive shaft, not shown here.
  • the hub 11 has a winding spool 12, which is used to wind up a lifting belt.
  • a coupling sleeve 14 which is connected in a rotationally fixed manner.
  • a wrap spring 15 is placed thereon by frictional engagement, the end turns of which are located on the end faces are designated by the reference numerals 16 and 17.
  • the latter have wrap spring ends 16a and 17a which are bent radially outward and formed into an eyelet, which are each formed from a part which is bent back radially in the direction of the wrap spring circumference and then angled again in the circumferential direction. This part is designated by the reference number 18.
  • ring flange 21 is integrally formed on the respective ring element 19 and 20 and serves, as Fig.l shows, for rotational support on the coupling sleeve 14 such that between the outer periphery of the wrap spring 15 and the inside of the ring elements 19 and 20 still at least little game remains.
  • flanges 28, which are also formed also extend outwards and can serve as a guide for a conductor fastened to the wrap spring ends 16a and 17a.
  • the ring elements 19 and 20 each have a recess 22 through which the wrap spring ends 16a and 17a pass.
  • a web 23 is located above each part 18 of the wrap spring ends 16a and 17a, which is bent in the circumferential direction, and engages over that part of the recess 22 in which the bent part 18 of a wrap spring end 16a and 17a is located.
  • the web 23 is in each case on a diameter which is somewhat larger than the outer diameter of the actual ring element 19 or 20 and will generally consist of one piece with this.
  • Figure 2 shows the wrap spring 15 in the rest position.
  • the wrap spring 15 can be taken along in this direction of rotation until its wrap spring end 17a abuts a counter stop 24.
  • the loop-forming end 17a like of course the Schlina spring end 16a and, like the associated winding threads 16 and 17 in all conceivable operating positions, is supported by the ring element 1 or 20, This is particularly true for the broken lines in figure 2 illustrated end position at the counter-stop 24.
  • One of the wrap spring 17a secured L pus end 25 can certainly receive a high overload, which is overlapped by the bridge 23 portion 18 R'a not in the radially outward direction emigrate can and thus the wrap spring end 17a, the end turn 17 and also the subsequent turns of the wrap spring 15 are protected against deflection.
  • the ring elements 19 and 20 each extend to the central region of the wrap spring 15 and have on their mutually facing end faces a groove 26 or a spring 27 engaging in these, which are dimensioned such that a relative rotatability between the ring elements 19 and 20 remains guaranteed .
  • the ring elements 19 and 20 receive additional guidance or stabilization.
  • a corresponding dimension of the other parts of the drive prevents the ring elements 19 and 20 from being able to be moved apart in the axial direction.
  • the part 18 angled in the circumferential direction can also be missing at the wrap spring ends 16a and 17a.
  • the web 23 is then also unnecessary.
  • the wrap spring end is supported by the fact that its part bent back in the radial direction bears against the inside of the web or, if this is missing, the inside of the recess in the ring element which is correspondingly smaller in the circumferential direction.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Blinds (AREA)
  • Holders For Apparel And Elements Relating To Apparel (AREA)
  • Earth Drilling (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Steering Controls (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

1. A tilting device for a venetian blind, having : a looped spring (15) which encloses a driving shaft (11) and is mounted thereon, at least under loading, with frictional contact directly or indirectly via a co-rotatable coupling sleeve (14) : looped spring ends (16a, 17a) bent outwardly from each end turn of the loop spring ; and fixed counter stops (24), an annular element (19, 20) entrainable in the direction of rotation by one of the looped spring ends being associated with each of the end turns and having a recess (22) at a place on its periphery through which the looped spring ends (16a, 17a) extend, the annular element (19, 20) enclosing the particular end turn of the looped spring (15) with a clearance such that, without affecting the spring function, any deflection is prevented which might cause permanent deformation of the looped spring (15), characterized in that the looped spring ends (16a, 17a) are directly connected to a guide member (25) which retains the lamellae, and on the rotation of the driving shaft (11) one of the ends of the loop spring abuts the counter stops (24) and reduces the frictional contact, and the annular element (19, 20) does not participate in the transmission of force between the looped spring (15) and the guide member (25), an annular element (19, 20) having on one side an inwardly extending annular flange (21) and itself bearing non-rotatably via the annular flange (21) alongside the looped spring (15) against the driving shaft or a coupling sleeve (14) enclosing the driving shaft.

Description

Die Erfindung betrifft eien Wendevorrichtung für eine Lamellenjalousie, mit einer eine Antriebswelle umgebenden, auf dieser unmittelbar oder mittelbar über eine drehfeste Kupplungshülse zumindest bei Belastung reibschlüssig gelagerten Schlingfeder, mit jeweils von einer Endwindung der Schlingfeder nach außen abgebogenen Schlingfederenden, die mit einer zum Halten der Lamellen dienenden Leiter verbunden sind, und mit feststehenden Gegenanschlägen, an denen das eine oder das andere Schlingfederende bei Drehung der Antriebswelle zur Anlage kommt und eine Herabsetzung des Reibschlusses bewirkt.The invention relates to a turning device for a louvre blind, with a drive shaft surrounding, on this directly or indirectly via a non-rotatable coupling sleeve, at least under load, frictionally mounted wrap spring, each with an end turn of the wrap spring bent outwards, with a for holding the lamellae serving conductors are connected, and with fixed counter-stops, on which one or the other wrap spring end comes to rest when the drive shaft rotates and brings about a reduction in the frictional engagement.

Bei einer derartigen Wendevorrichtung wird die Schlingfeder durch die Drehbewegung der Antriebswelle solange mitgenommen, bis eines der beiden Schlingfederenden an dem zugeordneten Gegenanschlag anliegt und ein weiterhin auf die Schlingfeder ausgeübtes Antriebsmoment ein öffnen der Schlingfeder, d.h. eine Durchmesservergrößerung bewirkt. Hierdurch wird der Reibschluß zwischen der Schlingfeder und der Antriebswelle beziehungsweise der Kupplungshülse auf einen nur noch sehr kleinen Wert herabgesetzt. An den Schlingfederenden greift im allgemeinen jeweils ein Ende einer aus einer Schnur, einer Kette oder einem Band bestehenden und zum Tragen der Lamellen dienenden Leiter an. Bei einer bekannten Ausführung sind die Leiterenden als geschlossene ösen und die Schlingfederenden als Haken ausgebildet, in die die ösen eingehängt werden können.In such a turning device, the wrap spring is carried along by the rotary movement of the drive shaft until one of the two wrap spring ends bears against the associated counterstop and a driving torque still exerted on the wrap spring causes the wrap spring to open, ie to increase the diameter. Here by the frictional engagement between the wrap spring and the drive shaft or the coupling sleeve is reduced to a very small value. At the ends of the wrap springs, one end generally engages one end of a conductor consisting of a cord, a chain or a band and used to carry the slats. In a known embodiment, the conductor ends are designed as closed eyelets and the wrap spring ends as hooks into which the eyelets can be hung.

Bei dieser Ausführungsform besteht die Gefahr, daß unvorh gesehenebeziehungsweise unkontrollierbare Belastungen von der Leiter ausgehen, die so groß sind, daß ein zu einer Öse umgebogenes Schlingfederende oder sogar der ganze angrenzende Bereich der Schlingfeder bleibend verformt werden kann. Hierdurch wird die Funktion der Schlingfeder beeinträchtigt.In this embodiment, there is the risk that unforeseen or uncontrollable loads emanate from the ladder which are so large that a loop spring end bent over to an eyelet or even the entire adjacent region of the loop spring can be permanently deformed. This affects the function of the wrap spring.

Es ist ferner eine andere Wendevorrichtung bekannt, bei der die Leiterenden nicht unmittelbar an den Enden der Schlingfeder befestigt sind. Es ist vielmehr jedem Schlingfederende ein Ringelement zugeordnet, das die Schlingfeder im Endbereich umgibt und das das radial nach außen abgebogene Schlingfederende in einer Bohrung aufnimmt. Das Ringelement hat an einer hierfür geeigneten Stelle seines Umfangs einen radial nach außen hervorstehenden Anschlag,der sowohl zum Zusammenwirken mit dem Gegenanschlag als auch zur Befestigung des zugeordneten Leiterendes dient.Another turning device is also known in which the conductor ends are not attached directly to the ends of the wrap spring. Rather, a ring element is associated with each wrap spring end, which surrounds the wrap spring in the end region and which receives the wrap spring end bent radially outwards in a bore. At a suitable point on its circumference, the ring element has a stop projecting radially outwards, which serves both for cooperation with the counter-stop and for fastening the associated conductor end.

Bei dieser Ausführung ist also das Ringelement in den Kraftübertragungsweg zwischen Schlingfederende und Leiter eingeschaltet. Es kann zwar im wesentlichen eine bleibende Schlingfederverformung verhindern, wobei aber der Nachteil eines verhältnismäßig großen Aufwandes für die Herstellung beziehungsweise Montage in Kauf genommen werden muß. Dieser Aufwand ist zum einen bedingt dadurch, daß es verhältnismäßig schwierig ist, ein radial nach außen abgebogenes Schlingfederende von der Innenseite des Ringelementes her in eine in diesem befindliche radiale Bohrung einzuführen. Zum anderen erfolgt die Befestigung eines Leiterendes derart, daß in dem Anschlag eine etwa tangentiale Bohrung vorgesehen wird, durch die das Leiterende in verhältnismäßig umständlicher Weise hindurchgeführt werden muß, um anschließend mittels eines Knotens oder auf andere geeignete Weise arretiert werden zu können. Nachteilig ist es ferner, daß bei der Montage eines jeden Ringelementes die Lage desselben der Lage des Schlingfederendes einerseits und des Gegenanschlages andererseits angepaßt sein muß.In this embodiment, the ring element is therefore switched into the force transmission path between the wrap spring end and the conductor. While it can essentially prevent permanent wrap spring deformation, but the disadvantage of a relatively large effort for the manufacture or assembly must be accepted. This effort is partly due to the fact that it is relatively difficult to insert a wrap spring end bent radially outwards from the inside of the ring element into a radial bore located therein. On the other hand, the attachment of a conductor end is carried out in such a way that an approximately tangential bore is provided in the stop, through which the conductor end must be passed in a relatively cumbersome manner in order to be able to be subsequently locked by means of a knot or in another suitable manner. A further disadvantage is that when each ring element is installed, the position of the ring element must be adapted to the position of the wrap spring end on the one hand and the counter-stop on the other.

Es war Aufgabe der vorliegenden Erfindung, eine Wendevorrichtung der eingangs genannten Art mit einfachen Mitteln so auszubilden, daß der zum Schutz der Schlingfeder gegen Verformung notwendige technische Aufwand wesentlich geringer ist.It was an object of the present invention to design a turning device of the type mentioned at the beginning with simple means in such a way that the technical outlay required to protect the wrap spring against deformation is substantially less.

Zur Lösung dieser Aufgabe wird erfindungsgemäß vorgeschlagen, daß den Endwindungen jeweils ein durch eines der Schlingfederenden in Drehrichtung mitnehmbares, an der Kraftübertragung zwischen Schlingfeder und Leiter unbeteiligtes Ringelement zugeordnet ist, das an einer Stelle seines Umfangs mit einer von dem Schlingfederende durchsetzten Aussparung versehen ist, und daß das Ringelement die jeweilige Endwindung der Schlingfeder mit einem solchen Spiel umgibt, daß ohne Beeinträchtiung der Federfunktion eine eine bleibende Verformung an der Schlingfeder ergebende Auslenkung verhindert wird.To achieve this object, it is proposed according to the invention that the end windings each have a ring element which can be taken through one of the wrap spring ends in the direction of rotation and is not involved in the force transmission between wrap spring and conductor and which is provided at one point on its circumference with a recess penetrated by the wrap spring end, and that the ring element surrounds the respective end turn of the wrap spring with such a game that without interference tiung the spring function a permanent deformation resulting in the wrap spring deflection is prevented.

Das Ringelement ist jetzt also an der Kraftübertragung unbeteiligt, so daß sich seine Ausbildung beziehungsweise Bemessung allein nach den für die Erfüllung der Abstützfunktion vorhandenen Gegebenheiten richten muß. Gegenüber der bekannten Anwendung eines Ringelementes ergibt sich der Vorteil, daß die wesentlich einfachere unmittelbare Befestigung der Leiterenden an den Schlingfederenden beibehalten werden kann. Auch braucht die Aussparung bei dem erfindungsgemäßen Ringelement nicht als enge Bohrung ausgeführt zu sein, weil das Ringelement an der Kraftübertragung zwischen der Schlingfeder und der Leiter unbeteiligt ist. Eine entsprechend größere Bemessung der Aussparung ist für die Erfüllung der Abstützfunktion ausreichend und erleichtert gleichzeitig das Einführen des Schlingfederendes in die Aussparung, falls nicht gemäß einer später noch zu beschreibenden Ausgestaltung der Erfindung die Aussparung zumindest an einer Seite offen ist.The ring element is now not involved in the power transmission, so that its training or dimensioning must be based solely on the existing conditions for the fulfillment of the support function. Compared to the known use of a ring element, there is the advantage that the much simpler direct attachment of the conductor ends to the wrap spring ends can be maintained. Also, the recess in the ring element according to the invention need not be designed as a narrow bore, because the ring element is not involved in the power transmission between the wrap spring and the conductor. A correspondingly larger dimensioning of the recess is sufficient for the fulfillment of the support function and at the same time facilitates the insertion of the wrap spring end into the recess, if the recess is not open at least on one side according to an embodiment of the invention to be described later.

Im übrigen ist es für die Funktionsweise günstig, daß sich die Drehlage des Ringelementes in Abhängigkeit von der jeweiligen Drehbewegung des zugeordneten Schlingfederendes selbsttätig einstellt und daß gleichzeitig einerseits eine unmittelbare Abstützung des radial nach außen abgebogenen Federendes und auch eine Abstützung der vom Ringelement umgebenen Federwindungen in einer solchen Weise erfolgt, daß sich diese nicht radial nach außen aufweiten können.For the rest, it is favorable for the mode of operation that the rotational position of the ring element adjusts itself automatically as a function of the respective rotational movement of the associated wrap spring end and that, on the one hand, direct support of the spring end bent radially outwards and also a support of the spring coils surrounded by the ring element in one takes place in such a way that they cannot expand radially outwards.

Weiterhin ist es erfindungsgemäß denkbar, daß das Federende zuerst in radialer Richtung zum Schlingfederumfang und dann in Umfangsrichtung zurückgebogen ist und daß der in Umfangsrichtung weisende Teil des Federendes an seiner Außenseite vom Ringelement vorzugsweise mittels eines Steges übergriffen wird. Auf diese Weise läßt sich eine zu stark elastische bzw. eine bleibende Verformung der Schlingfeder im Bereich ihrer Endwindung und des Schlingfederendes verhindern. Der betreffende Teil des Ringelementes kann zur Aufnahme des in Umfangsrichtung zurückgebogenen Teils entsprechend ausgespart sein oder aber mit einem den äußeren Umfang des Ringelementes gegebenenfalls auch überragenden Steg versehen sein.Furthermore, it is conceivable according to the invention that the spring end first in the radial direction to the loop spring circumference and then bent back in the circumferential direction and that the circumferential part of the spring end is overlapped on its outside by the ring element, preferably by means of a web. In this way, an excessively elastic or permanent deformation of the wrap spring in the region of its end turn and the wrap spring end can be prevented. The part of the ring element in question can be appropriately recessed to accommodate the part which is bent back in the circumferential direction, or else can be provided with a web which may also protrude from the outer circumference of the ring element.

Die Montage eines Ringelementes auf der Schlingfeder wird, wie bereits erwähnt, erfindungsgemäß dadurch vereinfacht, daß die Aussparung zumindest an einer Stirnseite des Ringelementes offen ist. Das Ringelement kann also in axialer Richtung auf die ihm zugewandte Seite der Schlingfeder aufgeschoben werden. Auch braucht das Ringelement nicht über den ganzen Umfang geschlossen zu sein, denn die Aussparung kann ferner auch durch einen in axialer Richtung durchgehenden Schlitz gebildet sein.The assembly of a ring element on the wrap spring is, as already mentioned, simplified according to the invention in that the recess is open at least on one end face of the ring element. The ring element can therefore be pushed in the axial direction onto the side of the wrap spring facing it. Also, the ring element does not need to be closed over the entire circumference, because the recess can also be formed by a slot that is continuous in the axial direction.

In weiterer Ausgestaltung der Erfindung wird vorgeschlagen, daß ein Ringelement an einer Seite einen sich nach innen erstreckenden Ringflansch hat und sich selbst mittels des Ringflansches neben der Schlingfeder auf der Antriebswelle oder einer diese umgebenden Kupplungshülse drehfrei abstützt. Da das Ringelement die Schlingfeder drehfrei umgeben soll, wird immer ein Spiel von bestimmter Mindestgröße zwischen dem Schlingfederumfang und dem Ringelement vorgesehen werden müssen. Mit Hilfe des Ringflansches läßt sich eine stabilere Lagerung des Ringelementes erreichen.In a further embodiment of the invention it is proposed that a ring element on one side has an inwardly extending ring flange and is supported by the ring flange next to the wrap spring on the drive shaft or a coupling sleeve surrounding it without rotation. Since the ring element is intended to surround the wrap spring without rotation, play of a certain minimum size will always have to be provided between the wrap spring circumference and the ring element. With the help of the ring flange a more stable mounting of the ring element can be achieved.

Ferner kann es erfindungsgemäß vorteilhaft sein, wenn das Ringelement an seiner axial nach außen weisenden Seite einen radial nach außen vorstehenden Flansch hat. Dieser kann unter bestimmten Betriebsbedingungen in günstiger Weise als Führung für die an den Schlingfederenden befestigte Leiter dienen.Furthermore, it can be advantageous according to the invention if the ring element has a radially outwardly projecting flange on its axially outwardly facing side. Under certain operating conditions, this can serve as a guide for the conductors attached to the wrap spring ends.

Weiterhin ist es erfindungsgemäß denkbar, daß sich die Rir.ilemente bis auf den zwischen den Federenden liegenden Schlingfederbereich erstrecken und sich aneinander abstützen. Hierdurch erhalten die Ringelemente eine Führung beziehungsweise Arretierung in jeweils der einen axialen Richtung. Besonders vorteilhaft ist diese Maßnahme dann, wenn mit einem Ringflansch versehene Ringelemente verwendet werden, da der Ringflansch dann jeweils die Arretierung beziehungsweise Abstützung in der anderen axialen Richtung bewirkt.Furthermore, it is conceivable according to the invention that the Rir.ilemente extend to the wrap spring area lying between the spring ends and are supported on each other. As a result, the ring elements are guided or locked in one axial direction. This measure is particularly advantageous if ring elements provided with an annular flange are used, since the annular flange then respectively locks or supports in the other axial direction.

In diesem Zusammenhang ist es erfindungsgemäß von Vorteil, wenn von den einander zugewandten Ringelement-Stirnseiten die eine Stirnseite mit einer Nut und die andere Stirnseite mit einem oder mehreren in die Nut eingreifenden Führungselementen versehen ist. Hierdurch wird erreicht, daß die Ringelemente eine zueinander koaxiale Lage beibehalten, wobei natürlich die Drehfreiheit durch den Eingriff der Führungselemente in die Nut nicht beeinträchtigt werden darf. Gegebenenfalls können die Führungselemente durch eine kreisringförmige Feder gebildet sein.In this context, it is advantageous according to the invention if one of the end faces of the ring element facing one another is provided with a groove and the other end side is provided with one or more guide elements engaging in the groove. This ensures that the ring elements maintain a coaxial position with one another, the freedom of rotation of course not being impaired by the engagement of the guide elements in the groove. If necessary, the guide elements can be formed by an annular spring.

Nachfolgend wird eine bevorzugte Ausführunqsform der Erfindung anhand einer Zeichnung näher beschrieben. Im einzelnen zeigen:

  • Figur 1 einen Längsschnitt durch einen Jalousieantrieb mit Wendevorrichtung;
  • Figur 2 einen Querschnitt entlang der Linie II - II in Figur 1;
  • Figur 3 als Sprengbild die Schlingfeder und die Ringelemente vor der Montage.
A preferred embodiment of the invention is described in more detail below with reference to a drawing. In detail show:
  • Figure 1 shows a longitudinal section through a blind drive with turning device;
  • FIG. 2 shows a cross section along the line II-II in FIG. 1;
  • Figure 3 as an explosive device, the wrap spring and the ring elements before assembly.

Der Jalousieantrieb hat ein Gehäuse 10, in dem eine Na-be 11 drehbar und durch eine hier nicht dargestellte Antriebswelle antreibbar gelagert ist. Wie Figur 2 erkennen läßt, ist die Na=be 11 mit einer Antriebswelle von quadratischem Querschnitt drehfest verbunden.The blind drive has a housing 10 in which a hub 11 is rotatably mounted and can be driven by a drive shaft, not shown here. As can be seen in FIG. 2, the Na = be 11 is connected in a rotationally fixed manner to a drive shaft of square cross section.

Die Nabe 11 hat eine Wickelspule 12, die zum Aufwickeln eines Hubbandes dient. Auf dem benachbaren Teil der Nabe 11 ist eine mit dieser drehfest verbundene Kupplungshülse 14 angeordnet. Auf diese ist reibschlüssig eine Schlingfeder 15 aufgesetzt, deren jeweils an den Stirnseiten liegende Endwindungen mit den Bezugsziffern 16 und 17 bezeichnet sind. Letztere haben radial nach außen abgebogene und zu einer Öse geformte Schlingfederenden 16a bzw. 17a, die jeweils aus einem radial in Richtung auf den Schlingfederumfang zurückgebogenen und anschließend wieder in Umfangsrichtung abgewinkelten Teil gebildet sind. Dieser Teil ist mit der Bezugsziffer 18 bezeichnet.The hub 11 has a winding spool 12, which is used to wind up a lifting belt. On the adjacent part of the hub 11 there is arranged a coupling sleeve 14 which is connected in a rotationally fixed manner. A wrap spring 15 is placed thereon by frictional engagement, the end turns of which are located on the end faces are designated by the reference numerals 16 and 17. The latter have wrap spring ends 16a and 17a which are bent radially outward and formed into an eyelet, which are each formed from a part which is bent back radially in the direction of the wrap spring circumference and then angled again in the circumferential direction. This part is designated by the reference number 18.

Auf die Schlingfeder 15 sind zwei Ringelemente 19 und 20 aufgesetzt, die an jeweils einer Seite mit einem sich nach innen erstreckenden Ringflansch 21 versehen ist. Der Ringflansch 21 ist an das jeweilige Ringelement 19 bzw. 20 angeformt und dient, wie Fig.l erkennen läßt, zur drehfreien Abstützung auf der Kupplungshülse 14 derart, daß zwischen dem äußeren Umfang der Schlingfeder 15 und der Innenseite der Ringelemente 19 und 20 noch ein zumindest kleines Spiel verbleibt. In gleicher Ebene mit den nach innen ragenden Ringflanschen 21 erstrecken sich ferner ebenfalls angeformte Flansche 28 nach außen, die als Führung für eine an den Schlingfederenden 16a und 17a befestigte Leiter dienen können.On the wrap spring 15 two ring elements 19 and 20 are placed, each with one side an inwardly extending ring flange 21 is provided. The ring flange 21 is integrally formed on the respective ring element 19 and 20 and serves, as Fig.l shows, for rotational support on the coupling sleeve 14 such that between the outer periphery of the wrap spring 15 and the inside of the ring elements 19 and 20 still at least little game remains. In the same plane with the inwardly projecting ring flanges 21, flanges 28, which are also formed, also extend outwards and can serve as a guide for a conductor fastened to the wrap spring ends 16a and 17a.

Die Ringelemente 19 und 20 haben jeweils eine Aussparung 22, durch die die Schlingfederenden 16a und 17a hindurchtreten. Jeweils über einem in Umfangsrichtung abgebogenen Teil 18 der Schlingfederenden 16a bzw. 17a befindet sich ein Steg 23, der nach innen hin denjenigen Teil der Aussparung 22 übergreift, in dem sich der abgebogene Teil 18 eines Schlingfederendes 16a bzw. 17a befindet. Der Steg 23 liegt jeweils auf einem Durchmesser, der etwas größer ist als der Außendurchmesser des eigentlichen Ringelementes 19 bzw. 20 und wird im allgemeinen mit diesem aus einem Stück bestehen.The ring elements 19 and 20 each have a recess 22 through which the wrap spring ends 16a and 17a pass. A web 23 is located above each part 18 of the wrap spring ends 16a and 17a, which is bent in the circumferential direction, and engages over that part of the recess 22 in which the bent part 18 of a wrap spring end 16a and 17a is located. The web 23 is in each case on a diameter which is somewhat larger than the outer diameter of the actual ring element 19 or 20 and will generally consist of one piece with this.

Figur 2 zeigt die Schlingfeder 15 in Ruhestellung. Wie strichpunktiert angedeutet, kann beispielsweise beim Antrieb der Nabe 11 im Uhrzeigersinn die Schlingfeder 15 soweit in dieser Drehrichtung mitgenommen werden, bis ihr Schlingfederende 17a an einem Gegenanschlag 24 anlieqt. Das Schlingfoderende 17a ist jedoch , wie natürlich auch dad Schlinafederende 16a und ebenso wie die zugehörigen Kndwindungen 16 und 17 in allen denkbaren Betriebsstellungen, durch das Ringelement 1 bzw. 20 abgestützt, Dies gilt insbesondere auch für die in figur 2 gestrichelt dargestellte Endstellung am Gegenanschlag 24. Ein an dem Schlingfederende 17a befestigtes Leiterende 25 kann durchaus auch eine hohe Überbelastung aufnehmen, r'a der vom Steg 23 übergriffene Teil 18 nicht in radialer Richtung nach außen auswandern kann und somit das Schlingfederende 17a, die Endwindung 17 und auch die anschließenden Windungen der Schlingfeder 15 gegen eine Auslenkung geschützt sind.Figure 2 shows the wrap spring 15 in the rest position. As indicated by dash-dotted lines, for example when the hub 11 is driven clockwise, the wrap spring 15 can be taken along in this direction of rotation until its wrap spring end 17a abuts a counter stop 24. However, the loop-forming end 17a, like of course the Schlina spring end 16a and, like the associated winding threads 16 and 17 in all conceivable operating positions, is supported by the ring element 1 or 20, This is particularly true for the broken lines in figure 2 illustrated end position at the counter-stop 24. One of the wrap spring 17a secured L pus end 25 can certainly receive a high overload, which is overlapped by the bridge 23 portion 18 R'a not in the radially outward direction emigrate can and thus the wrap spring end 17a, the end turn 17 and also the subsequent turns of the wrap spring 15 are protected against deflection.

Die Ringelemente 19 und 20 erstrecken sich jeweils bis zum mittleren Bereich der Schlingfeder 15 und haben an ihren einander zugewandten Stirnseiten eine Nut 26 beziehungsweise eine in diese eingreifende Feder 27, die so bemessen sind, daß eine relative Drehbarkeit zwischen den Ringelementen 19 und 20 gewährleistet bleibt. Durch diesen Eingriff jedoch erhalten die Ringelemente 19 und 20 eine zusätzliche Führung bzw. Stabilisierung. Im übrigen verhindert es eine entsprechende Abmessung der übrigen Teile des Antriebs, daß die Ringelemente 19 und 20 in axialer Richtung auseinanderbewegt werden können.The ring elements 19 and 20 each extend to the central region of the wrap spring 15 and have on their mutually facing end faces a groove 26 or a spring 27 engaging in these, which are dimensioned such that a relative rotatability between the ring elements 19 and 20 remains guaranteed . Through this intervention, however, the ring elements 19 and 20 receive additional guidance or stabilization. Moreover, a corresponding dimension of the other parts of the drive prevents the ring elements 19 and 20 from being able to be moved apart in the axial direction.

Alternativ hierzu kann der in Umfangsrichtung abgewinkelte Teil 18 an den Schlingfederenden 16a und 17a auch fehlen. Es ist dann auch der Steg 23 entbehrlich. In diesem Fall erfolgt, was Figur 2 ebenfalls erkennen läßt, die Abstützung des Schlingfederendes durch ein Anliegen seines in radialer Richtung zurückgebogenen Teils an der Innenseite des Steges oder, falls dieser fehlt, der Innenseite der in Umfangsrichtung entsprechend kleiner bemessenen Aussparung im Ringelement.As an alternative to this, the part 18 angled in the circumferential direction can also be missing at the wrap spring ends 16a and 17a. The web 23 is then also unnecessary. In this case, as can also be seen in FIG. 2, the wrap spring end is supported by the fact that its part bent back in the radial direction bears against the inside of the web or, if this is missing, the inside of the recess in the ring element which is correspondingly smaller in the circumferential direction.

Claims (8)

1. Wendevorrichtung für eine Lamellenjalousie, mit einer eine Antriebswelle umgebenden, auf dieser unmittelbar oder mittelbar über eine drehfeste Kupplungshülse zumindest bei Belastung reibschlüssig gelagerten Schlingfeder, mit jeweils von einer Endwindung der Schlingfeder nach außen abgebogenen Schlingfederenden, die mit einer zum Halten der Lamellen dienenden Leiter verbunden sind, und mit feststehenden Gegenanschlägen, an denen das eine oder das andere Schlingfederende bei Drehung der Antriebswelle zur Anlage kommt und eine Herabsetzung des Reibschlusses bewirkt, dadurch gekennzeichnet, daß den Endwindungen (16,17) jeweils ein durch eines der Schlingfederenden (16a,17a) in Drehrichtung mitnehmbares, an der Kraftübertragung zwischen Schlingfeder (15) und Leiter (25) unbeteiligtes Ringelement (19,20) zugeordnet ist, das an einer Stelle seines Umfangs mit einer von dem Schlingfederende (16a,17a) durchsetzten Aussparung (22) versehen ist, und daß das Ringelement (19,20) die jeweilige Endwindung (16,17) der Schlingfeder (15) mit einem solchen Spiel umgibt, daß ohne Beeinträchtigug der Federfunktion eine eine bleibende Verformung an der Schlingfeder (15) ergebende Auslenkung verhindert wird.1.Turning device for a louvre blind, with a drive shaft surrounding, on this directly or indirectly via a torsionally fixed coupling sleeve, at least under load, frictionally mounted wrap spring, each with an end turn of the wrap spring bent outwards, with a serving for holding the lamellae conductor are connected, and with fixed counter-stops, against which one or the other wrap spring end comes to rest when the drive shaft rotates and brings about a reduction in the frictional engagement, characterized in that the end windings (16, 17) each have a through one of the wrap spring ends (16a, 17a) is associated with a ring element (19, 20) which can be taken in the direction of rotation and is not involved in the force transmission between the wrap spring (15) and the conductor (25) and which has a recess (22) penetrated by the wrap spring end (16a, 17a) at one point on its circumference. is provided, and that the ring element (19, 20) the respective En dwinding (16, 17) surrounds the wrap spring (15) with such play that a permanent one without impairing the spring function Deformation on the wrap spring (15) resulting deflection is prevented. 2. Wendevorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Federende (16a,17a) zuerst in radialer Richtung zum Schlingfederumfang und dann in Umfangsrichtung zurückgebogen ist und daß der in Umfangsrichtung weisende Teil (18) des Federendes (16a,17a) an seiner Außenseite vom Ringelement (19,20) vorzugsweise mittels eines Steges (23) übergriffen wird.2. Turning device according to claim 1, characterized in that the spring end (16a, 17a) is first bent back in the radial direction to the wrap spring circumference and then in the circumferential direction and that the circumferential part (18) of the spring end (16a, 17a) on its outside is overlapped by the ring element (19, 20), preferably by means of a web (23). 3. Wendevorrichtung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Aussparung (22) zumindest an einer Stirnseite des Ringelementes (19,20) offen ist.3. Turning device according to one of the preceding claims, characterized in that the recess (22) is open at least on one end face of the ring element (19, 20). 4. Wendevorrichtung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß ein Ringelement (19,20) an einer Seite einen sich nach innen erstreckenden Ringflansch (21) hat und sich selbst mittels des Ringflansches (21) neben der Schlingfeder (15) auf der Antriebswelle oder einer diese umgebenden Kupplungshülse (14) drehfrei abstützt.4. Turning device according to one of the preceding claims, characterized in that a ring element (19, 20) has on one side an inwardly extending ring flange (21) and itself by means of the ring flange (21) next to the wrap spring (15) on the Drive shaft or a surrounding coupling sleeve (14) is supported without rotation. 5. Wendevorrichtung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß das Ringelement (19,20) an seiner in axialer Richtung nach außen weisenden Seite einen radial nach außen vorstehenden Flansch (28) hat.5. Turning device according to one of the preceding claims, characterized in that the ring element (19, 20) has a radially outwardly projecting flange (28) on its side pointing outward in the axial direction. 6. Wendevorrichtung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß sich die Ringelemente (19,20) bis auf den zwischen den Endwindungen (16,17) liegenden Schlingfederbereich erstrecken und sich aneinander abstützen.6. Turning device according to one of the preceding claims, characterized in that the ring elements (19, 20) extend to the wrap spring region lying between the end windings (16, 17) and are supported on one another. 7. Wendevorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß von den einander zugewandten Ringelement-Stirnseiten die eine Stirnseite mit einer Nut (26) und die andere Stirnseite mit einem oder mehreren in die Nut (26) eingreifenden Führungselementen (27) versehen ist.7. turning device according to claim 6, characterized in that of the mutually facing ring element end faces, one end face with a groove (26) and the other end face with one or more in the groove (26) engaging guide elements (27) is provided. 8. Wendevorrichtung entsprechend den Merkmalen der in der Zeichnung dargestellten Ausführungsform.8. turning device according to the features of the embodiment shown in the drawing.
EP86100979A 1985-02-05 1986-01-24 Tilting device for venetian blinds Expired EP0190626B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86100979T ATE48886T1 (en) 1985-02-05 1986-01-24 TURNING DEVICE FOR A BLIND BLINDS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8503040U 1985-02-05
DE8503040U DE8503040U1 (en) 1985-02-05 1985-02-05 Turning device for a venetian blind

Publications (3)

Publication Number Publication Date
EP0190626A2 true EP0190626A2 (en) 1986-08-13
EP0190626A3 EP0190626A3 (en) 1987-06-03
EP0190626B1 EP0190626B1 (en) 1989-12-20

Family

ID=6777056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86100979A Expired EP0190626B1 (en) 1985-02-05 1986-01-24 Tilting device for venetian blinds

Country Status (4)

Country Link
EP (1) EP0190626B1 (en)
AT (1) ATE48886T1 (en)
DE (2) DE8503040U1 (en)
DK (1) DK41686A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996027727A1 (en) * 1995-03-06 1996-09-12 Norbert Marocco Combined tilt and raise control for window coverings
WO1999043965A1 (en) * 1998-02-27 1999-09-02 Ford Global Technologies, Inc. Compliant coupling
EP1052365A2 (en) 1999-05-11 2000-11-15 Hunter Douglas Industries B.V. Operating mechanism for a venetian blind
US11480479B2 (en) * 2019-02-04 2022-10-25 The Board Of Trustees Of The University Of Illinois Microscale thermocouple probe for intracellular temperature measurements

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH273325A (en) * 1950-04-19 1951-02-15 Ag Rolladenfabrik A Griesser Mechanical pulling and locking device on a slatted blind.
CH400817A (en) * 1963-05-24 1965-10-15 Griesser Ag Raff slat blinds
CH454417A (en) * 1966-07-15 1968-04-15 Hunter Douglas Venetian blind
DE2400643A1 (en) * 1974-01-08 1975-07-17 Dieter Rau Winder mechanism for venetian blind - has cord-holder joined to attachment pivot-connected to coil spring
FR2393920A1 (en) * 1977-06-11 1979-01-05 Hunter Douglas Ind Bv CONTROL DEVICE FOR BLINDS OR BLINDS
FR2491541A1 (en) * 1980-10-06 1982-04-09 Schenker Emil Ag VENETIAN BLINDS

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH273325A (en) * 1950-04-19 1951-02-15 Ag Rolladenfabrik A Griesser Mechanical pulling and locking device on a slatted blind.
CH400817A (en) * 1963-05-24 1965-10-15 Griesser Ag Raff slat blinds
CH454417A (en) * 1966-07-15 1968-04-15 Hunter Douglas Venetian blind
DE2400643A1 (en) * 1974-01-08 1975-07-17 Dieter Rau Winder mechanism for venetian blind - has cord-holder joined to attachment pivot-connected to coil spring
FR2393920A1 (en) * 1977-06-11 1979-01-05 Hunter Douglas Ind Bv CONTROL DEVICE FOR BLINDS OR BLINDS
FR2491541A1 (en) * 1980-10-06 1982-04-09 Schenker Emil Ag VENETIAN BLINDS

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996027727A1 (en) * 1995-03-06 1996-09-12 Norbert Marocco Combined tilt and raise control for window coverings
WO1999043965A1 (en) * 1998-02-27 1999-09-02 Ford Global Technologies, Inc. Compliant coupling
EP1052365A2 (en) 1999-05-11 2000-11-15 Hunter Douglas Industries B.V. Operating mechanism for a venetian blind
EP1052365A3 (en) * 1999-05-11 2000-12-06 Hunter Douglas Industries B.V. Operating mechanism for a venetian blind
US11480479B2 (en) * 2019-02-04 2022-10-25 The Board Of Trustees Of The University Of Illinois Microscale thermocouple probe for intracellular temperature measurements

Also Published As

Publication number Publication date
DK41686D0 (en) 1986-01-28
EP0190626A3 (en) 1987-06-03
EP0190626B1 (en) 1989-12-20
DK41686A (en) 1986-08-06
DE8503040U1 (en) 1985-06-20
ATE48886T1 (en) 1990-01-15
DE3667692D1 (en) 1990-01-25

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