EP0199295B1 - Rotary potentiometer with switch - Google Patents

Rotary potentiometer with switch Download PDF

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Publication number
EP0199295B1
EP0199295B1 EP86105346A EP86105346A EP0199295B1 EP 0199295 B1 EP0199295 B1 EP 0199295B1 EP 86105346 A EP86105346 A EP 86105346A EP 86105346 A EP86105346 A EP 86105346A EP 0199295 B1 EP0199295 B1 EP 0199295B1
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EP
European Patent Office
Prior art keywords
potentiometer
rotary
switch
outer housing
switching
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP86105346A
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German (de)
French (fr)
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EP0199295A3 (en
EP0199295A2 (en
Inventor
Fritz Ing. Grad. Prestel
Martin Lohner
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Bsg-Schalttechnik & Co KG GmbH
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Bsg-Schalttechnik & Co KG GmbH
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Priority to AT86105346T priority Critical patent/ATE53695T1/en
Publication of EP0199295A2 publication Critical patent/EP0199295A2/en
Publication of EP0199295A3 publication Critical patent/EP0199295A3/en
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Publication of EP0199295B1 publication Critical patent/EP0199295B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/30—Adjustable resistors the contact sliding along resistive element
    • H01C10/32—Adjustable resistors the contact sliding along resistive element the contact moving in an arcuate path
    • H01C10/36—Adjustable resistors the contact sliding along resistive element the contact moving in an arcuate path structurally combined with switching arrangements

Definitions

  • the invention is based on a rotary potentiometer with a switch.
  • a second housing for the switch actuation is attached to a self-contained potentiometer housing, in which the actuation axis of rotation for the potentiometer adjustment also protrudes on the other side by a predetermined amount.
  • This contact part has a tongue with which it either makes direct contact via one of the spring connections with a further stationary and outwardly directed mating contact attached to the wall or by then pressing together two leaf spring-like adjacent external contacts in an isolated position, so that it becomes one Contact comes.
  • Such switch-potentiometer combinations are often used for half-wave and full-wave control with thyristors or triacs, with the entire control being switched on in certain positions or, if appropriate, a maximum position for full-wave control being reached by a switchover.
  • the invention solves this problem with the features of the main claim and has the advantage that when using and installing the potentiometer as an independent, finished, prefabricated component, only a few additional parts are required in order to have a rotary potentiometer-switch combination with perfect function and good linearity and one to build previously unattainable cost-effectiveness. At the same time, the assembly effort for producing such a combination is decisively reduced, with the further advantage that the final assembled combination module can be used without problems in any circuits and preferably also directly in prefabricated printed circuit boards, which then automatically results in the required connections to the conductor tracks.
  • cam ring which sits loosely but non-rotatably on the axis of rotation for the potentiometer and therefore enables a snap-action switch (torque switch) of the assigned switch when a predetermined angular position is reached.
  • the basic idea of the present invention is to provide for a completely self-contained small potentiometer with a push-through opening for the rotary actuation, another housing which accommodates it and is stored for use, which then also fulfills the additional function, corresponding switch components, contact piece carrier, elastic To store switch arms and connecting lugs for the switch in such a way that the switch can be actuated at the same time by turning a thru-axle for the potentiometer, whereby this thru-axle also holds the small potentiometer inserted in the receiving half-shell housing, either by latching behind-engaging ones, which initially recede when inserted Locking tongues or also by welding an axle end in the push-through opening, for example by heating and melting the axle made of a plastic material area.
  • FIG. 1 shows at 10 the small potentiometer inserted into a pot-like or half-shell-like over-housing 11, with the further indication that this small potentiometer is a completed, prefabricated rotary potentiometer component with its own housing, preferably completely encapsulated in the form of a round cylindrical disk, only with a central push-through opening for an axis of rotation, which is preferably out of round, so that the axis then sits in a rotationally fixed manner in this opening; In Fig. 1, this opening is designated 10a.
  • a further, generally valid advantage with such prefabricated small rotary potentiometers is that they can be produced fully automatically, and are therefore particularly cost-effective with perfect functional properties.
  • the general shape of the finished rotary potentiometer is completed in the lower region, i.e. at the point where the rotary potentiometer rests on the bottom of the pot-shaped housing 10, by two radially projecting tabs or lugs 12a, 12b (FIG. 2), which serve as contact connection carriers and at the same time allow the ring-shaped structure of the rotary potentiometer to pass into a rectangular shape at this point, so that the entire structure becomes out of round and the inserted potentiometer 10 in the outer housing 11 can be prevented from rotating by a correspondingly rectangular inner contour 13 in the receiving area of the outer housing.
  • FIG. 3 shows a view from below, that is to say into the half-shell-shaped outer housing with the switch contacts, with the small potentiometer 10 removed.
  • this wall merges into wall parts 16, 17, 18 which are parallel to the outer wall 11a and which are known as inner peripheral pockets can be designated and serve to accommodate switch parts inserted at this point.
  • These double walls 16, 17, 18 form, with the outer ring wall 11a, downwardly open receiving grooves or slots for the resilient and holding by pressure and friction of a rear transverse part 19b of a resilient switching arm 19 and of the rear end 20a of a stationary mating contact 20.
  • the resilient switching arm 19 is, starting from the cross member 19b and integrally connected to it via an intermediate member 21, bent several times in itself, so that in any case a loop-shaped bulge 19a pressed inward is formed, which forms the point of attack for a cam surface 22, which then acts on the bulge 19a runs up and thereby lifts the switching arm 19 in the direction of the outer edge of the outer housing 11 when an axis of rotation connected to the cam part 22 a Performs rotational movement along arrow A.
  • the bulge 19a then passes under the cam 22a formed by the cam surface 22, so that, preferably with a predetermined overstroke, the contact piece 23 on the switching arm 19 is pressed onto the mating contact tongue 20 with a predetermined contact contact force at 24.
  • the movable switching arm 19 and the stationary counter-contact 20 are preferably made of a suitable metallic spring alloy and are formed in one piece as a whole, also with their rear bearing or transverse parts, these transverse parts simultaneously at 25 and 26 in the plane of the drawing then in vertically upwardly projecting switches. Tongues overlap, which completes the structure of the contact connections for the combination.
  • the component having the switching cams 22a for the switch actuation consists of a cam ring 27, which has a non-circular push-through cutout 28 'in the center and, as can be seen best in the illustration in FIG. 1, on the bottom of the outer housing Part rests in a corresponding recess and is penetrated by the stub shaft 28 of the axis of rotation 29.
  • the overall structure is therefore as can best be seen from the illustration in FIG.
  • the bottom of the pot-shaped outer housing 11 has a central opening 30 through which the stub shaft 28 of the axis of rotation 29 is guided; the cam part 27 for the switch actuation then sits on the stub shaft and finally the stub shaft is still guided through the non-circular lead-through opening 10a of the small potentiometer 10 and the part protruding outward there is then either fused to a greater extent or anchored by latching lugs engaging behind edge areas of the lead-through opening of the potentiometer 10.
  • the axis of rotation rests with a widened shoulder 29a on the outer surface of the outer housing 11, so that the whole has a secure connection.
  • the axis of rotation 29 can then, as indicated at 31, merge into wing-like widenings, so that an operating button can be pushed open; such an actuation button is indicated at 32 and a preferred embodiment of the present invention consists in integrally forming this actuation button, which can also at least partially cover the structure of the overall combination by means of a ring apron 32a which is drawn down far, and the rotary button 32 along its circumference to provide corrugation.
  • a further advantageous measure of the present invention is to arrange the cam ring 27 with loose rotational play, that is to say with a predetermined clearance on the stub axle 28, so that a snap-action switch results if the cam 22a is turned away at the moment when the cam surface 22 wants to finally release the bulge 19a, by means of the spring pressure of the switching arm 19 the cam ring 27 can be suddenly pushed away by predetermined angular amounts, regardless of the further rotary movement, whereby the switch 19/23/24 opens abruptly and sparking is avoided.
  • the metallic parts forming the switching arm 19 and the fixed contact 20 are pushed into the receiving grooves from above in the plane of the drawing in FIG. 3, the parallel walls 16, 17, 18 also being able to partially retreat and then by a punctiform support , as indicated at 33, hold the corresponding metal parts under pressure.
  • the switch can also be designed as a power switch and closed when the potentiometer initially rotates; it is also possible to accommodate more than just one switch in the outer housing 11, for example in superimposed levels, which are then actuated by cam rings 27 which are superimposed in the same way. As a result, the overall height changes only marginally.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Adjustable Resistors (AREA)
  • Switches With Compound Operations (AREA)
  • Operation Control Of Excavators (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

A rotary potentiometer is provided with a switch, preferably as a final control element for the control of electrical machinery. An enclosed, prefabricated rotary potentiometer component with its own casing is inserted in a cup-shaped upper casing that is open on one side. Switching contact supports are housed in the upper casing by means of peripheral wall sections. These contact supports are actuated by a cam actuating member that is mounted on a fulcrum pin so as to permit play and simultaneously also effect rotation and retention of the potentiometer component in the upper casing.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Drehpotentiometer mit Schalter. Bei einem bekannten Schalter dieser Art (US-A-3 952 278) ist an ein in sich abgeschlossenes Potentiometergehäuse, bei dem die Betätigungsdrehachse für die Potentiometerverstellung auf der anderen Seite ebenfalls um einen vorgegebenen Betrag hinausragt, ein zweites Gehäuse für die Schalterbetätigung angesetzt. Dieses zweite, ebenfalls zylindrische Gehäuse lagert mit zwei einander gegenüberliegenden und an der Gehäusewandung befestigten Federn ein zentrales Kontaktteil, welches über eine Rutschkupplung mit der Potentiometerachse verbunden ist. Dieses Kontaktteil verfügt über eine Zunge, mit welcher es entweder unmittelbar über einen der Federanschlüsse einen Kontakt mit einem weiteren an der Wand befestigten stationären und nach außen geführten Gegenkontakt herstellt oder indem es in dann isolierter Position zwei blattfederartig nebeneinanderstehende Außenkontakte zusammendrückt, so daß es zu einer Kontaktgabe kommt.The invention is based on a rotary potentiometer with a switch. In a known switch of this type (US-A-3 952 278), a second housing for the switch actuation is attached to a self-contained potentiometer housing, in which the actuation axis of rotation for the potentiometer adjustment also protrudes on the other side by a predetermined amount. This second, also cylindrical housing, with two springs lying opposite each other and fastened to the housing wall, supports a central contact part which is connected to the potentiometer axis via a slip clutch. This contact part has a tongue with which it either makes direct contact via one of the spring connections with a further stationary and outwardly directed mating contact attached to the wall or by then pressing together two leaf spring-like adjacent external contacts in an isolated position, so that it becomes one Contact comes.

Bei diesen Kontaktgaben handelt es sich lediglich um Momentkontaktgaben, die so lange anhalten, wie auf die Potentiometerdrehwelle eine Verstellkraft ausgeübt wird. Sobald das Potentiometer seine gewünschte, an sich beliebige Endposition erreicht, wird das Kontaktelement durch die Federwirkung der beidseitigen Halterungen in eine Ausgangs-Nullposition zurückgeführt. Die Befestigung des zweiten und insofern zum Potentiometergehäuse koaxial angeordneten Schaltergehäuses erfolgt durch längere metallische Zungen, die von der Außenwandung des Potentiometergehäuses ausgehen und das Schaltergehäuse umfassen und auf dessen Bodenseite abgeknickt sind.These contacts are only momentary contacts that last as long as an adjusting force is exerted on the potentiometer rotary shaft. As soon as the potentiometer reaches its desired end position, which is in itself arbitrary, the contact element is returned to an initial zero position by the spring action of the brackets on both sides. The second switch housing, which is coaxial with the potentiometer housing, is fastened by means of longer metallic tongues which extend from the outer wall of the potentiometer housing and embrace the switch housing and are bent on the bottom side thereof.

Allgemein sind kombinierte, gleichzeitig eine Schaltbewegung mit einer Potentiometerstellbewegung durchführende oder in eine zeitliche Zuordnung zueinander bringende elektrische Schaltungskomponente in vielfältiger Form bekannt, so daß ferner noch auf die DE-A-27 46 841 verwiesen wird, die eine Vorrichtung zum Schalten und gleichzeitigen allmählichen Verstellen elektrischen Einflußgrößen in Form eines Drehpotentiometers umfaßt. Dabei sind separat und angrenzend zu einem auf einer Schalterplatte angeordneten Drehpotentiometer Mikroschalter oder ähnliche Schaltungselemente angeordnet, die dann betätigt werden, wenn in der Potentiometerverdrehung eine bestimmte Position, üblicherweise eine Endposition, erreicht ist. Solche Schalter-Potentiometerkombinationen dienen häufig einer Halb- und Vollwellenregelung mit Thyristoren oder Triacs, wobei in bestimmten Positionen entweder die ganze Regelung eingeschaltet oder gegebenenfalls eine durch eine Umschaltung erreichbare Maximalposition zur Vollwellenansteuerung erreicht wird.In general, combined electrical switching components which simultaneously perform a switching movement with a potentiometer actuating movement or bring them into a temporal association are known, so that reference is also made to DE-A-27 46 841, which describes a device for switching and simultaneous gradual adjustment electrical influencing variables in the form of a rotary potentiometer. In this case, microswitches or similar circuit elements are arranged separately and adjacent to a rotary potentiometer arranged on a switch plate, which are actuated when a certain position, usually an end position, has been reached in the potentiometer rotation. Such switch-potentiometer combinations are often used for half-wave and full-wave control with thyristors or triacs, with the entire control being switched on in certain positions or, if appropriate, a maximum position for full-wave control being reached by a switchover.

Der Aufbau solcher Schalter-Drehpotentiometerkombinationen ist üblicherweise kompliziert und kostenaufwendig, da, und zwar selbst dann, wenn unmittelbar auf Leiterplatten gebaut wird, jedenfalls die Widerstandsbahn auf diesen üblicherweise durch beidseitige Nieten befestigt werden muß und die Schalter häufig als separate Bauteile angrenzend zur Nocken aufweisenden Potentiometer-Umfangskontur angeordnet werden, also eigene Gehäuse, jedenfalls Halterungen für die Schaltarme u.dgl. aufweisen müssen.The construction of such switch-rotary potentiometer combinations is usually complicated and costly, since, even if it is built directly onto printed circuit boards, the resistance track must usually be fastened to these by rivets on both sides and the switches often as separate components adjacent to the cam potentiometers -Circumference contour to be arranged, so own housing, at least brackets for the switching arms and the like. must have.

Es ist daher die Aufgabe vorliegender Erfindung, eine Kombination aus Drehpotentiometer mit Schalter in drastisch vereinfachter und insbesondere stark kostengünstiger Weise als separates Bauteil zur Verfügung zu stellen, welches an beliebiger Stelle Steuer- oder Regelsystemen noch zugeordnet werden kann, beispielsweise als Stellglied mit Schaltmöglichkeiten.It is therefore the object of the present invention to provide a combination of rotary potentiometer with switch in a drastically simplified and, in particular, very inexpensive manner as a separate component which can still be assigned to control or regulating systems at any point, for example as an actuator with switching options.

Vorteile der ErfindungAdvantages of the invention

Die Erfindung löst diese Aufgabe mit den Merkmalen des Hauptanspruchs und hat den Vorteil, daß bei Verwendung und Einbau des Potentiometers als unabhängiges, abgeschlossenes vorgefertigtes Bauteil überhaupt nur noch wenige weitere Teile erforderlich sind, um eine Drehpotentiometer-Schalterkombination mit einwandfreier Funktion und guter Linearität und einer bisher nicht erreichbaren Kostengünstigkeit aufzubauen. Gleichzeitig ist der Montageaufwand zur Herstellung einer solchen Kombination entscheidend reduziert mit dem weiteren Vorteil, daß sich der endmontierte Kombinationsbaustein problemlos in beliebige Schaltungen und vorzugsweise auch unmittelbar in vorgefertigte Leiterplatten einsetzen läßt, wodurch sich dann auch automatisch sofort die erforderlichen Anschlüsse zu den Leiterbahnen ergeben.The invention solves this problem with the features of the main claim and has the advantage that when using and installing the potentiometer as an independent, finished, prefabricated component, only a few additional parts are required in order to have a rotary potentiometer-switch combination with perfect function and good linearity and one to build previously unattainable cost-effectiveness. At the same time, the assembly effort for producing such a combination is decisively reduced, with the further advantage that the final assembled combination module can be used without problems in any circuits and preferably also directly in prefabricated printed circuit boards, which then automatically results in the required connections to the conductor tracks.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen Drehpotentiometers mit Schalter möglich. Besonders vorteilhaft ist zur Aufnahme und Lagerung des vorgefertigten Kleindrehpotentiometers ein äußeres Halbschalengehäuse, welches eine der Außenform des einzusetzenden Potentiometerbausteins entsprechende Innenkontur aufweist und metallische Schaltarm- und gleichzeitig Kontaktanschlußbahnen und -federn in Gehäusewandausnehmungen oder -taschen aufnimmt.Advantageous further developments and improvements of the rotary potentiometer with switch specified in the main claim are possible through the measures listed in the subclaims. It is particularly advantageous for receiving and storing the prefabricated small rotary potentiometer, an outer half-shell housing which has an inner contour corresponding to the outer shape of the potentiometer module to be used and which accommodates metallic switching arm and contact connecting tracks and springs in housing wall recesses or pockets.

Schließlich ist vorteilhaft die zusätzliche Anordnung einer Art Nockenring, der lose, aber drehfest auf der Drehachse für das Potentiometer sitzt und daher eine Schnappschalterwirkung (Momentumschaltung) des zugeordneten Schalters ermöglicht, wenn eine vorgegebene Winkelposition erreicht ist.Finally, the additional arrangement of a type of cam ring is advantageous, which sits loosely but non-rotatably on the axis of rotation for the potentiometer and therefore enables a snap-action switch (torque switch) of the assigned switch when a predetermined angular position is reached.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

  • Fig. 1 die erfindungsgemäße Kombination aus Drehpotentiometer und Schalter in einem seitlichen Schnitt längs der Linie I-I der Fig. 2;
  • Fig. 2 das Ausführungsbeispiel der Fig. 1 in einer Draufsicht aus der Richtung X der Fig. 1 und
  • Fig. 3 die gleiche Darstellungsform wie in Fig. 2 gezeigt, jedoch lediglich mit entnommenem Kleinpotentiometer und
  • Fig. 4 das Ausführungsbeispiel der Fig. 1 in der Draufsicht aus der Richtung Y in Fig. 1.
An embodiment of the invention is shown in the drawing and is explained in more detail in the following description. Show it:
  • Fig. 1 the combination of the invention Rotary potentiometer and switch in a lateral section along the line II of Fig. 2;
  • Fig. 2 shows the embodiment of FIG. 1 in a plan view from the direction X of FIGS. 1 and
  • Fig. 3 shows the same form of representation as shown in Fig. 2, but only with the small potentiometer and
  • 4 shows the embodiment of FIG. 1 in plan view from the direction Y in FIG. 1st

Beschreibung der AusführungsbeispieleDescription of the embodiments

Der Grundgedanke vorliegender Erfindung besteht darin, für ein in sich vollkommen abgeschlossenes, mit einer Durchstecköffnung für die Drehbetätigung versehenes Kleinpotentiometer ein weiteres, dieses aufnehmendes und für die Verwendung lagerndes Übergehäuse vorzusehen, welches dann gleichzeitig noch die zusätzliche Funktion erfüllt, entsprechende Schalterkomponenten, Kontaktstückträger, elastische Schaltarme und Anschlußfahnen für den Schalter so zu lagern, daß sich die Schalterbetätigung gleichzeitig bei Verdrehen einer Steckachse für das Potentiometer vornehmen läßt, wobei diese Steckachse gleichzeitig auch das in das aufnehmende Halbschalengehäuse eingelegte Kleinpotentiometer festhält, entweder durch Verrastung von hintergreifenden, beim Einschieben zunächst wieder zurückweichenden Rastzungen oder auch durch Verschweißung eines Achsenendes in der Durchstecköffnung, beispielsweise durch Erwärmen und Schmelzen des aus einem Kunststoffmaterial bestehenden Achsenbereichs.The basic idea of the present invention is to provide for a completely self-contained small potentiometer with a push-through opening for the rotary actuation, another housing which accommodates it and is stored for use, which then also fulfills the additional function, corresponding switch components, contact piece carrier, elastic To store switch arms and connecting lugs for the switch in such a way that the switch can be actuated at the same time by turning a thru-axle for the potentiometer, whereby this thru-axle also holds the small potentiometer inserted in the receiving half-shell housing, either by latching behind-engaging ones, which initially recede when inserted Locking tongues or also by welding an axle end in the push-through opening, for example by heating and melting the axle made of a plastic material area.

Die Darstellung der Fig. 1 zeigt bei 10 das in ein topfartiges oder halbschalenartig ausgebildetes Übergehäuse 11 eingelegte Kleinpotentiometer, mit dem weiteren Hinweis, daß dieses Kleinpotentiometer ein abgeschlossenes, vorgefertigtes Drehpotentiometer-Bauteil ist mit eigenem Gehäuse, vorzugsweise vollkommen gekapselt in Form einer runden Zylinderscheibe, lediglich mit einer mittleren Durchstecköffnung für eine Drehachse, die vorzugsweise unrund ist, so daß die Achse dann in dieser Öffnung drehfest sitzt; in der Fig. 1 ist diese Öffnung mit 10a bezeichnet. Dabei besteht ein weiterer, allgemein gültiger Vorteil bei solchen vorgefertigten Kleindrehpotentiometern darin, daß diese vollautomatisch hergestellt werden können, daher besonders kostengünstig sind bei gleichzeitig einwandfreien Funktionseigenschaften. Die allgemeine Form des fertigen Drehpotentiometers vervollständigt sich im unteren Bereich, also an der Stelle, wo das Drehpotentiometer am Boden des topfförmigen Gehäuses 10 anliegt, durch zwei radial wegstehende Lappen oder Ansätze 12a, 12b (Fig. 2), die als Kontaktanschluß-Träger dienen und gleichzeitig den ringförmigen Aufbau des Drehpotentiometers an dieser Stelle in einer Rechteckform übergehen lassen, so daß der ganze Aufbau unrund wird und sich eine Verdrehsicherung des eingelegten Potentiometers 10 im Übergehäuse 11 durch ein entsprechend rechteckförmig verlaufende Innenkontur 13 im Aufnahmebereich des Übergehäuses erzielen läßt.The illustration in FIG. 1 shows at 10 the small potentiometer inserted into a pot-like or half-shell-like over-housing 11, with the further indication that this small potentiometer is a completed, prefabricated rotary potentiometer component with its own housing, preferably completely encapsulated in the form of a round cylindrical disk, only with a central push-through opening for an axis of rotation, which is preferably out of round, so that the axis then sits in a rotationally fixed manner in this opening; In Fig. 1, this opening is designated 10a. A further, generally valid advantage with such prefabricated small rotary potentiometers is that they can be produced fully automatically, and are therefore particularly cost-effective with perfect functional properties. The general shape of the finished rotary potentiometer is completed in the lower region, i.e. at the point where the rotary potentiometer rests on the bottom of the pot-shaped housing 10, by two radially projecting tabs or lugs 12a, 12b (FIG. 2), which serve as contact connection carriers and at the same time allow the ring-shaped structure of the rotary potentiometer to pass into a rectangular shape at this point, so that the entire structure becomes out of round and the inserted potentiometer 10 in the outer housing 11 can be prevented from rotating by a correspondingly rectangular inner contour 13 in the receiving area of the outer housing.

Auf den inneren Aufbau des vorgefertigten Kleindrehpotentiometers braucht nicht weiter eingegangen zu werden, da dies nicht Gegenstand der Erfindung ist; der einfache Aufbau eines solchen Potentiometerbausteins vervollständigt sich lediglich noch durch drei nach außen geführte Kontaktzungen, nämlich eine erste Kontaktzunge 14a, die das Abgriffpotential führt und zwei weitere Kontaktzungen 14b, 14c, die die beiden endseitigen Anschlüsse der Widerstandsbahn betreffen. Beim Einlegen in das Übergehäuse 11 (vergl. Fig. 1) ragen diese Kontaktzungen über die in der Zeichenebene der Fig. 1 rechte, mit Bezug auf die Drehpotentiometer-Schalterkombination untere Abschlußfläche hinaus und erstrecken sich in der gleichen Richtung wie zwei am Übergehäuse angeordnete, vorzugsweise mit dem Kunststoffmaterial des Übergehäuse einstückige Fixier- und Lagerzapfen 15a, 15b, so daß sich eine solchermaßen aufgebaute Kombination aus Drehpotentiometer und Schalter in entsprechende Aufnahme-Fixierbohrungen etwa einer Leiterplatte mit zugeordneten Bohrungen für den Durchtritt der Kontaktzungen des Potentiometers und, wie weiter unten gleich noch erläutert wird, des oder der Schalter, einsetzen und befestigen läßt. Die Kontaktzungen ragen dann bis zur gegenüberliegenden Leiterbahn-Fläche von der Bestückungsseite der Leiterplatte durch und können dort mit zugeordneten Leiterbahnen, etwa durch Tauchlötung, auch elektrisch verbunden werden.There is no need to go into the internal structure of the prefabricated small rotary potentiometer, since this is not the subject of the invention; The simple construction of such a potentiometer module is only completed by three outwardly directed contact tongues, namely a first contact tongue 14a, which carries the tap potential, and two further contact tongues 14b, 14c, which relate to the two end connections of the resistance track. When inserted into the outer casing 11 (cf. FIG. 1), these contact tongues protrude beyond the lower end surface on the right in the drawing plane of FIG. 1, with respect to the rotary potentiometer-switch combination, and extend in the same direction as two arranged on the outer casing, preferably with the plastic material of the outer housing fixing and bearing journals 15a, 15b, so that a combination of rotary potentiometer and switch constructed in this way can be found in corresponding receptacle fixing bores, for example a printed circuit board with associated bores for the passage of the contact tongues of the potentiometer and, as below, the same will be explained, the switch or switches, insert and fasten. The contact tongues then project through to the opposite conductor track surface from the component side of the circuit board and can also be electrically connected there to associated conductor tracks, for example by dip soldering.

Wesentliche Maßnahmen vorliegender Erfindung lassen sich am besten der Darstellung der Fig. 3 entnehmen, die in einer Ansicht von unten, also in das halbschalenförmige Übergehäuse hinein dieses mit den Schalterkontakten zeigt, bei entnommenem Kleinpotentiometer 10.Essential measures of the present invention can best be seen from the illustration in FIG. 3, which shows a view from below, that is to say into the half-shell-shaped outer housing with the switch contacts, with the small potentiometer 10 removed.

Man erkennt, daß neben der unrunden, durch die Kontur 13 gewährleisteten Innenform für die Aufnahme des Potentiometers an bestimmten Stellen der Ringwandung 11a des Übergehäuses 11 diese Wandung in radial nach innen wegstehende, zur Außenwandung 11a parallele Wandungsteile 16, 17, 18 übergeht, die als innere periphere Taschen bezeichnet werden können und der Aufnahme von an dieser Stelle eingelegten Schalterteilen dienen. Diese Doppelwandungen 16, 17, 18 bilden mit der äußeren Ringwandung 11a nach unten offene Aufnahmenuten oder Schlitze zur federnden und durch Druck und Reibung gehaltenen Aufnahme einmal eines hinteren Querteils 19b eines federnden Schaltarms 19 sowie des hinteren Endes 20a eines stationären Gegenkontaktes 20. Der federnde Schaltarm 19 ist, ausgehend vom Querglied 19b und einstükkig über ein Zwischenglied 21 mit diesem verbunden, mehrfach in sich abgebogen, so daß jedenfalls eine nach innen gedrückte schleifenförmige Ausbuchtung 19a gebildet ist, die den Angriffspunkt für eine Nockenfläche 22 bildet, die dann auf die Ausbuchtung 19a aufläuft und dabei den Schaltarm 19 in Richtung auf den äußeren Rand des Übergehäuses 11 aushebt, wenn eine mit dem Nockenteil 22 verbundene Drehachse eine Drehbewegung längs des Pfeils A ausführt. Die Ausbuchtung 19a gelangt dann unter die von der Nockenfläche 22 gebildete Nocke 22a, so daß, vorzugsweise mit einem vorgegebenen Überhub, das Kontaktstück 23 am Schaltarm 19 mit vorgegebener Kontakt-Anpreßkraft bei 24 auf die Gegenkontaktzunge 20 gedrückt wird.It can be seen that in addition to the non-circular inner shape guaranteed by the contour 13 for receiving the potentiometer at certain points in the annular wall 11a of the outer housing 11, this wall merges into wall parts 16, 17, 18 which are parallel to the outer wall 11a and which are known as inner peripheral pockets can be designated and serve to accommodate switch parts inserted at this point. These double walls 16, 17, 18 form, with the outer ring wall 11a, downwardly open receiving grooves or slots for the resilient and holding by pressure and friction of a rear transverse part 19b of a resilient switching arm 19 and of the rear end 20a of a stationary mating contact 20. The resilient switching arm 19 is, starting from the cross member 19b and integrally connected to it via an intermediate member 21, bent several times in itself, so that in any case a loop-shaped bulge 19a pressed inward is formed, which forms the point of attack for a cam surface 22, which then acts on the bulge 19a runs up and thereby lifts the switching arm 19 in the direction of the outer edge of the outer housing 11 when an axis of rotation connected to the cam part 22 a Performs rotational movement along arrow A. The bulge 19a then passes under the cam 22a formed by the cam surface 22, so that, preferably with a predetermined overstroke, the contact piece 23 on the switching arm 19 is pressed onto the mating contact tongue 20 with a predetermined contact contact force at 24.

Der bewegliche Schaltarm 19 und der stationäre Gegenkontakt 20 bestehen vorzugsweise aus einer geeigneten metallischen Federlegierung und sind insgesamt, auch mit ihren hinteren Lager- oder Querteilen einstückig ausgebildet, wobei diese Querteile gleichzeitig bei 25 und 26 in der Zeichenebene dann in vertikal nach oben abstehende Schalter-Kontaktzungen übergehen, wodurch sich der Aufbau der Kontaktanschlüsse für die Kombination vorvollständigt.The movable switching arm 19 and the stationary counter-contact 20 are preferably made of a suitable metallic spring alloy and are formed in one piece as a whole, also with their rear bearing or transverse parts, these transverse parts simultaneously at 25 and 26 in the plane of the drawing then in vertically upwardly projecting switches. Tongues overlap, which completes the structure of the contact connections for the combination.

Entsprechend einer bevorzugten Ausgestaltung vorliegender Erfindung besteht das den Schaltnocken 22a für die Schalterbetätigung aufweisende Bauteil aus einem Nockenring 27, der mittig einen unrunden Durchsteckausschnitt 28' aufweist und am Bodengrund des Übergehäuses, wie am besten der Darstellung der Fig. 1 entnommen werden kann, als unterstes Teil in einer entsprechenden Ausnehmung anliegt und von dem Achsstummel 28 der Drehachse 29 durchsetzt ist. Der Gesamtaufbau ist daher so, wie am besten der Darstellung der Fig. 1 entnommen werden kann; der Boden des topfförmigen Übergehäuses 11 weist eine zentrale Durchbrechung 30 auf, durch die der Achsstummel 28 der Drehachse 29 geführt ist; anschließend sitzt auf dem Achsstummel dann das Nockenteil 27 für die Schalterbetätigung und schließlich ist der Achsstummel noch durch die unrunde Durchführungsöffnung 10a des Kleinpotentiometers 10 geführt und der dort nach außen ragende Teil dann entweder verbreitert angeschmolzen oder durch Randbereiche der Durchführungsöffnung des Potentiometers 10 hintergreifende Rastnasen verankert. Auf der anderen Seite liegt die Drehachse mit einer verbreiterten Abschulterung 29a an der Außenfläche des Übergehäuses 11 an, so daß das Ganze einen sicheren Zusammenhang bekommt. Die Drehachse 29 kann dann noch, wie bei 31 angedeutet, in flügelartige Aufweitungen übergehen, so daß ein Betätigungsknopf aufgeschoben werden kann; ein solcher Betätigungsknopf ist bei 32 angedeutet und eine bevorzugte Ausführungsform vorliegender Erfindung besteht darin, diesen Betätigungsknopf, der durch eine weit herabgezogene Ringschürze 32a auch den Aufbau der Gesamtkombination mindestens teilweise überdecken kann, mit der Drehachse 29 einstückig auszubilden und den Drehknopf 32 an seinem Umfang mit einer Riefelung zu versehen.According to a preferred embodiment of the present invention, the component having the switching cams 22a for the switch actuation consists of a cam ring 27, which has a non-circular push-through cutout 28 'in the center and, as can be seen best in the illustration in FIG. 1, on the bottom of the outer housing Part rests in a corresponding recess and is penetrated by the stub shaft 28 of the axis of rotation 29. The overall structure is therefore as can best be seen from the illustration in FIG. 1; the bottom of the pot-shaped outer housing 11 has a central opening 30 through which the stub shaft 28 of the axis of rotation 29 is guided; the cam part 27 for the switch actuation then sits on the stub shaft and finally the stub shaft is still guided through the non-circular lead-through opening 10a of the small potentiometer 10 and the part protruding outward there is then either fused to a greater extent or anchored by latching lugs engaging behind edge areas of the lead-through opening of the potentiometer 10. On the other hand, the axis of rotation rests with a widened shoulder 29a on the outer surface of the outer housing 11, so that the whole has a secure connection. The axis of rotation 29 can then, as indicated at 31, merge into wing-like widenings, so that an operating button can be pushed open; such an actuation button is indicated at 32 and a preferred embodiment of the present invention consists in integrally forming this actuation button, which can also at least partially cover the structure of the overall combination by means of a ring apron 32a which is drawn down far, and the rotary button 32 along its circumference to provide corrugation.

Schließlich besteht eine weitere vorteilhafte Maßnahme vorliegender Erfindung darin, den Nockenring 27 mit losem Drehspiel, also mit einem vorgegebenen Freigang auf dem Achsstummel 28 anzuordnen, so daß sich eine Schnappschalterwirkung ergibt, wenn beim Wegdrehen der Nocke 22a in dem Moment, zu welchem die Nockenfläche 22 die Ausbuchtung 19a endgültig freigeben möchte, durch den Federdruck des Schaltarms 19 der Nockenring 27 unabhängig von der weiter durchgeführten Drehbewegung schlagartig um vorgegebene Winkelbeträge weggedrückt werden kann, wodurch der Schalter 19/23/24 abrupt öffnet und eine Funkenbildung vermieden wird.Finally, a further advantageous measure of the present invention is to arrange the cam ring 27 with loose rotational play, that is to say with a predetermined clearance on the stub axle 28, so that a snap-action switch results if the cam 22a is turned away at the moment when the cam surface 22 wants to finally release the bulge 19a, by means of the spring pressure of the switching arm 19 the cam ring 27 can be suddenly pushed away by predetermined angular amounts, regardless of the further rotary movement, whereby the switch 19/23/24 opens abruptly and sparking is avoided.

Bei der Montage werden die metallischen, den Schaltarm 19 und den Festkontakt 20 bildenden Teile von oben in der Zeichenebene der Fig. 3 gesehen in die Aufnahmenuten eingeschoben, wobei die Parallelwandungen 16, 17, 18 auch teilweise zurückweichen können und dann, durch eine punktförmige Auflage, wie bei 33 angedeutet, die entsprechenden Metallteile unter Druck festhalten.During assembly, the metallic parts forming the switching arm 19 and the fixed contact 20 are pushed into the receiving grooves from above in the plane of the drawing in FIG. 3, the parallel walls 16, 17, 18 also being able to partially retreat and then by a punctiform support , as indicated at 33, hold the corresponding metal parts under pressure.

Es versteht sich, daß die spezielle Art und Ausbildung der jeweils im Zuge der Potentiometerverstellung zu betätigenden Schalter an sich beliebig ist; so kann natürlich durch entsprechende Umformung der Nocken und des Drehbereiches der Schalter auch als Netzschalter ausgebildet sein und bei anfänglicher Drehbewegung des Potentiometers geschlossen werden; es ist auch möglich, mehr als nur einen Schalter im Übergehäuse 11 unterzubringen, beispielsweise in übereinanderliegenden Ebenen, die dann von in gleicher Weise übereinanderliegenden Nockenringen 27 betätigt werden. Die Bauhöhe verändert sich hierdurch nur unwesentlich. Hierdurch ist es möglich, beispielsweise einen Netzschalter beim anfänglichen Verdrehen des Potentiometers zu schließen und in der Endposition der Potentiometerstellung einen sogenannten Max-Schalter zu betätigen, der im Falle einer Halb- oder Vollwellensteuerung dann die jeweilige volle Netzhalbwelle auf das Gerät durchschaltet, also unter Umgehung der hier gegebenenfalls eingesetzten Phasenanschnittsteuerung.It goes without saying that the special type and design of the switches to be actuated in the course of the potentiometer adjustment is in itself arbitrary; Thus, of course, by appropriately reshaping the cams and the range of rotation, the switch can also be designed as a power switch and closed when the potentiometer initially rotates; it is also possible to accommodate more than just one switch in the outer housing 11, for example in superimposed levels, which are then actuated by cam rings 27 which are superimposed in the same way. As a result, the overall height changes only marginally. This makes it possible, for example, to close a mains switch when the potentiometer is initially rotated and to actuate a so-called max switch in the end position of the potentiometer position, which then switches through the respective full mains half-wave to the device in the case of a half or full-wave control, i.e. bypassing it any leading edge control used here.

Claims (10)

1. A rotary potentiometer with a wiper sliding on a resistive track and at least one switch which can be simultaneously operated by the rotary movement of an axle, preferably when end-positions of the potentiometer are reached, in which
a) a self-contained, prefabricated rotary-potentiometer component (10), having its own housing and outwardly-guided attachment tongues (14a, 14b, 14c), is inserted in a further pot-shaped outer housing (11) open on one side;
b) switching-contact carriers (19, 20) are arranged in the outer housing and are held by wall parts (16, 17, 18) of the latter, and are switched by a cam operation part arranged on a rotary axle (29) which simultaneously brings about rotation of the wiper and mounting of the potentiometer-component (10); and in which
c) the wall parts (16, 17,18) of the outer housing are one-piece parallel wall regions staggered towards the inside and forming, with the outer wall (11 a) of the outer housing, receiving pockets which, under pressure action, retain and mount the inserted switching-contact carriers (19, 20).
2. A rotary potentiometer with a switch according to Claim 1, characterised in that the cam operating part on the rotary axle (29) is a cam ring (27).
3. A rotary potentiometer with a switch according to Claim 1 or 2, characterised in that the rotary axle (29) is guided through an opening (30) in the base of the outer housing (11) and first penetrates the cam ring (27) - which effects the movements of the switching-contact carriers (19, 20) - and then penetrates the passage opening (10a) of the potentiometer unit (10) and is bolted to the latter on the non-facing side.
4. A rotary potentiometer with a switch according to Claim 3, characterised in that the rotary axle has an axle stub which engages behind the passage opening (10a) of the potentiometer unit (10) with click-stop projections, or is expanded by melting.
5. A rotary potentiometer with a switch according to Claim 3, characterised in that the cam ring (27) is seated on the rotary axle (29) in order to achieve a snap-switch effect with play.
6. A rotary potentiometer with a switch according to any one of Claims 1 to 5, characterised in that a first switching-contact carrier (20) is held stationary on the inner wall of the outer housing (11) and a second switching-contact carrier (19) is constructed as a switching arm resilient under the action of a cam (22a) and movable on the cam ring (27), and has a bulge (19a) on which the cam (22a) of the cam ring (27) acts in order to operate the switch.
7. A rotary potentiometer with a switch according to any one of Claims 1 to 6, characterised in that the outer housing (11) has mounting and fixing studs (15a, 15b).
8. A rotary potentiometer with a switch according to any one of Claims 1 to 7, characterised in that contact tongues (14a, 14b, 14c; 25, 26) project from the rotary-potentiometer unit (10) and from the switching-contact carriers (19, 20) and extend in the same direction as the mounting studs (15a, 15b) of the outer housing (11), in such a way that the combination of rotary potentiometer and switch is directly fastened to a printed circuit board, and the contact tongues on the conductor track side can be electrically connected to conductor tracks.
9. A rotary potentiometer with a switch according to any one of Claims 1 to 8, characterised in that the rotary axle (29) and a rotary knob (32) are constructed preferably in one piece.
10. A rotary potentiometer with a switch according to Claim 9, characterised in that the rotary knob (32) covers the rotary potentiometer/ switch structure with a drawn-down skirt (32a).
EP86105346A 1985-04-24 1986-04-17 Rotary potentiometer with switch Expired - Lifetime EP0199295B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86105346T ATE53695T1 (en) 1985-04-24 1986-04-17 ROTARY POTENTIOMETER WITH SWITCH.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3514708 1985-04-24
DE19853514708 DE3514708A1 (en) 1985-04-24 1985-04-24 ROTATION POTENTIOMETER WITH SWITCH

Publications (3)

Publication Number Publication Date
EP0199295A2 EP0199295A2 (en) 1986-10-29
EP0199295A3 EP0199295A3 (en) 1988-05-18
EP0199295B1 true EP0199295B1 (en) 1990-06-13

Family

ID=6268929

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86105346A Expired - Lifetime EP0199295B1 (en) 1985-04-24 1986-04-17 Rotary potentiometer with switch

Country Status (4)

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US (1) US4682142A (en)
EP (1) EP0199295B1 (en)
AT (1) ATE53695T1 (en)
DE (2) DE3514708A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4827241A (en) * 1987-10-30 1989-05-02 United Technologies Automotive, Inc. Combined, in-line spacer and switch, particularly for a vehicle's headlight
US4885434A (en) * 1988-05-12 1989-12-05 United Technologies Automotive Inc. Automotive headlight, push-pull, rotary switch system
JP2832911B2 (en) * 1988-05-30 1998-12-09 アイシン精機株式会社 Variable resistor with switch
US5264821A (en) * 1990-11-27 1993-11-23 United Technologies Automotive Rotary, push-pull headlight switch with ceramic coated metal substrate rheostat and cam actuated dome light bypass switch
US5546067A (en) * 1994-12-14 1996-08-13 United Technologies Automotive, Inc. Rotary potentiometer assembly for a push-pull switch
US5838222A (en) * 1996-01-16 1998-11-17 Bi Technologies Corporation Multiturn potentiometer
US8253007B1 (en) * 2009-11-18 2012-08-28 Richard Ned Steinberger Potentiometer control for musical instruments

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
GB664257A (en) * 1948-12-14 1952-01-02 Globe Union Inc Electrical switch and variable resistor for miniature electrical apparatus
FR1516928A (en) * 1967-01-16 1968-02-05 Improvements to potentiometer switches
DE6803685U (en) * 1968-10-24 1969-04-24 Preh Elektro Feinmechanik MOUNTING SWITCH
JPS5216374Y2 (en) * 1972-10-28 1977-04-13
US4081782A (en) * 1976-08-04 1978-03-28 Bourns, Inc. Combined rotary potentiometer and switch
US4117444A (en) * 1977-07-14 1978-09-26 Bourns, Inc. Hearing aid volume control
DE2746481A1 (en) * 1977-10-15 1979-04-19 Bayer Ag Reactive micro-gel particle prepn. - by emulsion polymerisation of unsatd. polyester resin and ethylenic-unsatd. monomer
DE2746841A1 (en) * 1977-10-19 1979-04-26 Bsg Schalttechnik Switching device simultaneously changing control variable - has potentiometer whose shaft is cam-shaped and operates switches
DE8512061U1 (en) * 1985-04-24 1985-07-04 Bsg Schalttechnik Gmbh & Co Kg, 7460 Balingen Rotary potentiometer with switch

Also Published As

Publication number Publication date
DE3514708C2 (en) 1988-09-29
EP0199295A3 (en) 1988-05-18
EP0199295A2 (en) 1986-10-29
US4682142A (en) 1987-07-21
DE3514708A1 (en) 1986-10-30
DE3672010D1 (en) 1990-07-19
ATE53695T1 (en) 1990-06-15

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