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EP0407949B1 - Electric key switch with a locking device - Google Patents

Electric key switch with a locking device Download PDF

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Publication number
EP0407949B1
EP0407949B1 EP90113108A EP90113108A EP0407949B1 EP 0407949 B1 EP0407949 B1 EP 0407949B1 EP 90113108 A EP90113108 A EP 90113108A EP 90113108 A EP90113108 A EP 90113108A EP 0407949 B1 EP0407949 B1 EP 0407949B1
Authority
EP
European Patent Office
Prior art keywords
push
button
latching
switching body
link
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90113108A
Other languages
German (de)
French (fr)
Other versions
EP0407949A2 (en
EP0407949A3 (en
Inventor
Berthold Geck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB AG Germany
ABB AB
Original Assignee
Asea Brown Boveri AG Germany
Asea Brown Boveri AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asea Brown Boveri AG Germany, Asea Brown Boveri AB filed Critical Asea Brown Boveri AG Germany
Publication of EP0407949A2 publication Critical patent/EP0407949A2/en
Publication of EP0407949A3 publication Critical patent/EP0407949A3/en
Application granted granted Critical
Publication of EP0407949B1 publication Critical patent/EP0407949B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/56—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state upon the next application of operating force
    • H01H13/562—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state upon the next application of operating force making use of a heart shaped cam

Definitions

  • the invention relates to an electrical push button switch with a latching device according to the preamble of claim 1.
  • Pushbutton switches with curved locking in which the up and down position of the pushbutton is accomplished by means of a locking element which engages with a locking link, are known in many different embodiments.
  • a pushbutton switch is known, the latching device of which has a latching element formed on the pushbutton in the form of a switching pin and a heart-shaped latching slot which is recessed in a slide plate and which is in turn slidably mounted in a long groove of the switch housing transversely to the pushbutton guide direction.
  • the sliding plate not in the push button guide direction, but only transversely to the push button guide direction is movable, the movable locking element in the locking link must accommodate the entire vertical switching stroke of the push button. In order to realize the small switching stroke paths required for special applications, the vertical locking stroke to be accomplished by the locking element must conventionally be correspondingly small.
  • the push button stroke can be shortened by more than half while the latching element stroke remains the same.
  • the latching element which is slidably guided in a long groove of the slide across the pushbutton guide, can be moved counter to the movement of the pushbutton.
  • the entire push-button switching stroke can be divided into a plurality of opposing movements, that is to say in movements of the latching link towards the latching element (in the pushbutton guide direction) and in movements of the latching element towards the latching link (against the pushbutton guide direction).
  • an essentially cuboid switching body is provided, which is guided in translation in the push button guide direction.
  • the carriage of the latching and moving device according to the invention which is deflected in opposite directions via the two-armed lever, is thus moved in a translationally opposite manner to the switching body.
  • a disk-shaped switching body carrying the latching link is provided, which is rotatably mounted on parts of the switch housing.
  • the translational movement of the pushbutton in the pushbutton guide direction impresses the switching body on a rotary movement via a switching cam provided on this disk-shaped switching body.
  • This also results in a relative movement of the locking link in relation to the locking element.
  • the opposite relative movement of the carriage in relation to the rotary moving switching body is accomplished in that the carriage is deflected via two two-armed levers, a first lever arm being articulated on the translationally guided push button or on the rotating moving moving body.
  • the movement of each point of the rotationally moved switching body not only has a movement component transverse to the push button guide direction, but also a movement component in the push button guide direction.
  • the switch body is designed in the form of a one-armed lever articulated on parts of the switch housing, the free end of which carries the latching link.
  • the first lever arms of the two-armed lever of the traversing device according to the invention for the latching element are in turn articulated to parts of the push button or the switch body. Since in this exemplary embodiment the latching link is moved in a circle around the pivot point of the switching body as soon as the pushbutton is pressed or released, the latching link or the control cam and the latching element movable thereon also run in opposite directions to one another in this embodiment.
  • FIG. 1 shows the latching and moving device according to the invention for a latching element 8 formed on a pushbutton switch 1 according to a first exemplary embodiment.
  • a pushbutton 2 which is guided linearly in a switch housing 3, acts on an essentially cuboid switching body 4.
  • On the switching body 4 is a locking link 7 having a heart-shaped control curve 25.
  • a locking element 8 is in engagement with the locking link 7, which has a locking element pin 9 and a locking element slide 10.
  • the locking element slide 10 is slidably mounted transversely to the pushbutton guide direction in the elongated slot 16 of a slide 15.
  • a laterally pivotable, curved wire spring could also be arranged on the slide 15.
  • the carriage 15 is also slidably mounted in a groove between the switch body 4 and a housing wall of the switch housing 3 in the push button guide direction.
  • Two two-armed levers 11 are each articulated via pivot points 14 on opposite parts of the switch housing 3 in the form of a swivel joint.
  • the free end of a first lever arm 12 has a first pivot pin 18, which is in engagement with a first sliding joint elongated hole 20 formed on the switching body 4. In this way, a joint combination of a swivel joint and a thrust joint is formed.
  • the free ends of second lever arms 13 have a second pivot pin 19, which is in engagement with a second sliding joint elongated hole 21.
  • the joint 17 formed here is also a joint combination of a swivel joint and a sliding joint.
  • the lever arms 12, 13 are of equal length.
  • the ratio of push button stroke / locking element stroke can, however, be changed as required by corresponding variation of the lengths of the lever arms 12, 13.
  • a pushbutton return spring 26 is used, which is supported at one end in a recess in the switching body 4, and which with another end is supported on a circuit board 29.
  • a contact bridge 27 used for contacting contacts on the printed circuit board 29 is spring-mounted in a contact bridge pressure spring receiving shaft 30 by means of a contact bridge compression spring 28.
  • a light-emitting diode 31 is provided for illuminating the pushbutton 2.
  • FIG. 2 shows a top view of the locking and moving device according to the invention of the pushbutton switch 1 with the pushbutton 2 removed.
  • Fig. 3 shows a second embodiment of the locking and moving device according to the invention for the locking element 8, in which a switching body 5 is disc-shaped and is rotatably mounted about a pivot point 23 on parts of the switch housing 2.
  • a switching cam 22 is provided, by means of which the actuating force F of the pushbutton 2, which is moved translationally in the pushbutton guide direction, causes a rotary movement of the switching body 5.
  • the switching body 5 is set into a rotational movement about the pivot point 23 via the switching cam 22, the latching link 7 and thus part of the control cam 25 moves towards the latching element pin 9 of the latching element 8.
  • the locking element pin 9 in turn likewise moves this piece of the control cam 25 in the opposite direction, since it is moved in the opposite direction to the push button guide direction via the slide 15 and the two-armed lever 11.
  • the locking element 8 is slidably mounted in an elongated slot of the slide 15.
  • the rest of the design of the locking and moving device according to the invention corresponds to the arrangement according to the first embodiment.
  • Fig. 4 shows a third embodiment of the locking and moving device according to the invention with a switching body 6 designed as a one-armed lever.
  • the switching body 6 is pivotable about a pivot point 24, which is rotatably mounted on parts of the switch housing 2.
  • the latching link 7 is formed, in which the latching element slide 10 of the latching element 8, which is slidably guided in the elongated slot 16 of the carriage 15, is slidably guided.
  • the carriage 15 is in turn articulated via the two-armed lever 11, as shown in FIG. 1, to parts of the switch body 6 or to parts of the push button 2 in order to ensure the movement in the opposite direction to the push button 2.
  • the switch-on stroke is initiated by pressing the pushbutton 2, the first lever arm 12 being pivoted into a lower reversing position. Since the carriage 15 is articulated on the second lever arm 13 of the two-armed lever 11, it is brought into an upper deflection position. Here, the locking element pin 9 slides along the control cam 25 to an upper stop point of the locking link 7. After releasing the pushbutton 2, the locking element pin 9 now slides down and remains in a stable switch-on position E. The switch-on stroke is ended. The switch-off stroke is initiated by pressing pushbutton 2 again.
  • the first lever arm 12 again moves into its lower pivot position, and then remain in an upper swivel position.
  • the second lever arm 13 has in this case moved the carriage 15 into the lower part of the switch housing 2, the latching element pin 9 coming to rest in a lower stable switch-off position A. This completes the switch-off stroke.

Landscapes

  • Push-Button Switches (AREA)

Description

Die Erfindung betrifft einen elektrischen Drucktastenschalter mit einer Rastvorrichtung nach dem Oberbegriff des Anspruchs 1.The invention relates to an electrical push button switch with a latching device according to the preamble of claim 1.

Drucktastenschalter mit kurvengebundener Verrastung, bei denen die Hoch- und Tiefstellung der Drucktaste mittels eines mit einer Rastkulisse in Eingriff stehenden Rastelements bewerkstelligt wird, sind in vielfältigen Ausführungsformen bekannt.Pushbutton switches with curved locking, in which the up and down position of the pushbutton is accomplished by means of a locking element which engages with a locking link, are known in many different embodiments.

Aus der DE-OS 36 11 190 ist ein Drucktastenschalter bekannt, dessen Rastvorrichtung ein an der Drucktaste in Gestalt eines Schaltzapfens angeformtes Rastelement sowie eine in einer Schieberplatte ausgesparte, herzförmige Rastkulisse aufweist, welche ihrerseits in einer Langnut des Schaltergehäuses quer zur Drucktastenführungsrichtung gleitverschiebbar gelagert ist. Dadurch, daß die Schiebeplatte nicht in Drucktastenführungsrichtung, sondern lediglich quer zur Drucktastenführungsrichtung verschiebbar ist, muß das in der Rastkulisse verfahrbare Rastelement den gesamten vertikalen Schalthub der Drucktaste aufnehmen. Um für besondere Anwendungen erforderlich werdende kleine Schalthubwege zu verwirklichen, muß herkömmlicherweise der vom Rastelement zu bewerkstelligende vertikale Rasthub entsprechend klein ausfallen. Dies läßt sich im Stand der Technik nur mit kleinen Rastkulissen erreichen. Hierdurch leidet naturgemäß die mechanische Stabilität der Rastvorrichtung sowie die Genauigkeit und Sicherheit der Verrastung. Aufgrund dieser, bei Schaltern mit kurvengebundener Verrastung auftretenden Probleme läßt sich der Schalthub des bekannten Schalters nicht weiter verkleinern. Hier versucht die Erfindung Abhilfe zu schaffen.From DE-OS 36 11 190 a pushbutton switch is known, the latching device of which has a latching element formed on the pushbutton in the form of a switching pin and a heart-shaped latching slot which is recessed in a slide plate and which is in turn slidably mounted in a long groove of the switch housing transversely to the pushbutton guide direction. Characterized in that the sliding plate not in the push button guide direction, but only transversely to the push button guide direction is movable, the movable locking element in the locking link must accommodate the entire vertical switching stroke of the push button. In order to realize the small switching stroke paths required for special applications, the vertical locking stroke to be accomplished by the locking element must conventionally be correspondingly small. In the prior art, this can only be achieved with small latching links. This naturally affects the mechanical stability of the locking device and the accuracy and safety of the locking. Because of these problems, which occur in switches with curved locking, the switching stroke of the known switch cannot be reduced further. The invention attempts to remedy this.

Ausgehend vom gattungsgemäß vorbekannten Stand der Technik und unter Vermeidung der vorgenannten Nachteile ist es demnach Aufgabe der Erfindung, eine Rastvorrichtung für das Rastelement zu schaffen, die es ermöglicht, bei gleichbleibendem Rasthub des Rastelements eine deutliche Verringerung des Schalthubs der Drucktaste zu erzielen.Starting from the prior art of the generic type and avoiding the aforementioned disadvantages, it is therefore an object of the invention to provide a latching device for the latching element, which makes it possible to achieve a significant reduction in the switching stroke of the pushbutton with a constant latching stroke of the latching element.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen und Ausführungen der Erfindung sind in den Unteransprüchen näher gekennzeichnet.This object is solved by the features of claim 1. Advantageous further developments and designs of the invention are characterized in more detail in the subclaims.

Gegenüber den herkömmlichen Rastvorrichtungen, bei denen der Rastelementhub dem Drucktastenhub entspricht, läßt sich mit der erfindungsgemäßen Rast- und Verfahrvorrichtung für das Rastelement der Drucktastenhub bei gleichbleibendem Rastelementhub um mehr als die Hälfte verkürzen. Dadurch, daß ein an Teilen des Schaltergehäuses angelenkter, zweiarmiger Hebel vorgesehen ist, dessen erster Hebelarm mit einem von der Drucktaste beaufschlagten Schaltkörper und dessen zweiter Hebelarm mit einem gegenüber der Rastkulisse und dem Schaltergehäuse bewegbaren Schlitten gelenkig verbunden ist, kann das mittels eines Schiebers in einer Langnut des Schlittens quer zur Drucktastenführung gleitgeführte Rastelement gegenläufig zur Bewegung der Drucktaste verfahren werden. Es findet somit nicht nur eine Relativbewegung zwischen Rastkulisse und Rastelement sowie Rastkulisse und Schaltergehäuse statt, sondern mit der erfindungsgemäßen Vorrichtung wird zusätzlich eine Relativbewegung des Rastelements in Drucktastenführungsrichtung in Bezug auf das Schaltergehäuse erreicht. Das heißt, daß nicht wie bei den herkömmlichen Rastvorrichtungen entweder die Rastkulisse oder das Rastelement, jeweils bezogen auf das Schaltergehäuse starr angeordnet sind und sich damit entweder die Rastkulisse auf das Rastelement oder das Rastelement auf die Rastkulisse zubewegt, sondern daß, sowohl die Rastkulisse als auch das Rastelement gleichzeitig eine Relativbewegung zueinander durchführen in Bezug auf das unbewegliche Schaltergehäuse. Hierdurch läßt sich der gesamte Drucktastenschalthub in mehrere gegenläufige Bewegungen, das heißt in Bewegungen der Rastkulisse auf das Rastelement zu (in Drucktastenführungsrichtung) und in Bewegungen des Rastelements auf die Rastkulisse zu (entgegen der Drucktastenführungsrichtung) aufteilen.Compared to the conventional latching devices, in which the latching element stroke corresponds to the push button stroke, with the latching and moving device according to the invention for the latching element, the push button stroke can be shortened by more than half while the latching element stroke remains the same. Characterized in that a two-arm lever articulated on parts of the switch housing is provided, the first lever arm with a switch body acted upon by the pushbutton and the second lever arm of which is articulated to a slide that is movable relative to the latching link and the switch housing, the latching element, which is slidably guided in a long groove of the slide across the pushbutton guide, can be moved counter to the movement of the pushbutton. Thus, not only is there a relative movement between the latching link and the latching element and the latching link and the switch housing, but with the device according to the invention a relative movement of the latching element in the push button guide direction with respect to the switch housing is additionally achieved. This means that, as with the conventional latching devices, either the latching link or the latching element are each arranged rigidly with respect to the switch housing and thus either the latching link moves towards the latching element or the latching element towards the latching link, but rather that both the latching link and the latching element simultaneously perform a relative movement with respect to the immovable switch housing. As a result, the entire push-button switching stroke can be divided into a plurality of opposing movements, that is to say in movements of the latching link towards the latching element (in the pushbutton guide direction) and in movements of the latching element towards the latching link (against the pushbutton guide direction).

In vorteilhafter Ausbildung der Erfindung ist ein im wesentlichen quaderförmiger Schaltkörper vorgesehen, welcher in Drucktastenführungsrichtung translatorisch geführt ist. Der über den zweiarmigen Hebel hierzu gegensinnig umgelenkte Schlitten der erfindungsgemäßen Rast- und Verfahrvorrichtung wird somit translatorisch gegenläufig zum Schaltkörper bewegt.In an advantageous embodiment of the invention, an essentially cuboid switching body is provided, which is guided in translation in the push button guide direction. The carriage of the latching and moving device according to the invention, which is deflected in opposite directions via the two-armed lever, is thus moved in a translationally opposite manner to the switching body.

Gemäß einer weiteren Ausführungsform der Erfindung ist ein die Rastkulisse tragender scheibenförmiger Schaltkörper vorgesehen, welcher an Teilen des Schaltergehäuses drehbar gelagert ist. Über einen an diesem scheibenförmigen Schaltkörper vorgesehenen Schaltnocken prägt die in Drucktastenführungsrichtung ausgeführte translatorische Bewegung der Drucktaste dem Schaltkörper eine rotatorische Bewegung auf. Hierdurch findet ebenfalls eine Relativbewegung der Rastkulisse in Bezug auf das Rastelement statt. Die gegenläufige Relativbewegung des Schlittens in Bezug auf den rotatorisch bewegten Schaltkörper wird dadurch bewerkstelligt, daß der Schlitten über zwei zweiarmige Hebel umgelenkt wird, wobei ein erster Hebelarm an der translatorisch geführten Drucktaste oder am rotatorisch bewegten Schaltkörper angelenkt ist. Hierbei ist zu beachten, daß die Bewegung jedes Punktes des rotatorisch bewegten Schaltkörpers nicht nur eine Bewegungskomponente quer zur Drucktastenführungsrichtung, sondern auch eine Bewegungskomponente in Drucktastenführungsrichtung aufweist.According to a further embodiment of the invention, a disk-shaped switching body carrying the latching link is provided, which is rotatably mounted on parts of the switch housing. The translational movement of the pushbutton in the pushbutton guide direction impresses the switching body on a rotary movement via a switching cam provided on this disk-shaped switching body. This also results in a relative movement of the locking link in relation to the locking element. The opposite relative movement of the carriage in relation to the rotary moving switching body is accomplished in that the carriage is deflected via two two-armed levers, a first lever arm being articulated on the translationally guided push button or on the rotating moving moving body. It should be noted here that the movement of each point of the rotationally moved switching body not only has a movement component transverse to the push button guide direction, but also a movement component in the push button guide direction.

Gemäß einer weiteren vorteilhaften Ausführungsform ist der Schaltkörper in Form eines an Teilen des Schaltgehäuses angelenkten einarmigen Hebels ausgebildet, dessen freies Ende die Rastkulisse trägt. Die ersten Hebelarme des zweiarmigen Hebels der erfindungsgemäßen Verfahrvorrichtung für das Rastelement sind wiederum mit Teilen der Drucktaste oder des Schaltkörpers gelenkig verbunden. Da bei diesem Ausführungsbeispiel die Rastkulisse auf einem Kreis um den Drehpunkt des Schaltkörpers bewegt wird, sobald die Drucktaste gedrückt oder losgelassen wird, laufen auch bei diesem Ausführungsbeispiel die Rastkulisse bzw. die Steuerkurve und das auf dieser verfahrbare Rastelement gegenläufig aufeinander zu.According to a further advantageous embodiment, the switch body is designed in the form of a one-armed lever articulated on parts of the switch housing, the free end of which carries the latching link. The first lever arms of the two-armed lever of the traversing device according to the invention for the latching element are in turn articulated to parts of the push button or the switch body. Since in this exemplary embodiment the latching link is moved in a circle around the pivot point of the switching body as soon as the pushbutton is pressed or released, the latching link or the control cam and the latching element movable thereon also run in opposite directions to one another in this embodiment.

Die Erfindung soll nachstehend anhand mehrerer Ausführungsbeispiele sowie anhand der schematischen Zeichnung näher beschrieben und erläutert werden.The invention will be described and explained in more detail below with the aid of several exemplary embodiments and with the aid of the schematic drawing.

Es zeigen:

Fig. 1
eine Seitenschnittansicht entlang der Schnittlinie I-I in Fig. 2 eines die erfindungsgemäße Rast- und Verfahrvorrichtung aufweisenden Drucktastenschalters mit einem Schaltkörper 4 gemäß einem ersten Ausführungsbeispiel,
Fig. 2
eine Aufsicht auf einen Drucktastenschalter mit der erfindungsgemäßen Rast- und Verfahrvorrichtung für das Rastelement 8 bei abgenommener Drucktaste 2 eines die erfindungsgemäße Rast- und Verfahrvorrichtung aufweisenden Drucktastenschalters mit einem Schaltkörper 4 gemäß einem ersten Ausführungsbeispiel,
Fig. 3
eine schematische Seitenansicht der erfindungsgemäßen Rast- und Verfahrvorrichtung für das Rastelement 8 mit einem Schaltkörper 5 gemäß einem zweiten Ausführungsbeispiel,
Fig. 4
eine schematische Seitenansicht der erfindungsgemäßen Rast- und Verfahrvorrichtung für das Rastelement 8 mit einem Schaltkörper 6 gemäß einem dritten Ausführungsbeispiel.
Show it:
Fig. 1
3 shows a side sectional view along the section line II in FIG. 2 of a pushbutton switch having the latching and moving device according to the invention with a switch body 4 according to a first exemplary embodiment,
Fig. 2
1 shows a top view of a pushbutton switch with the latching and moving device according to the invention for the latching element 8 when the pushbutton 2 is removed from a pushbutton switch having the latching and moving device according to the invention with a switching body 4 according to a first exemplary embodiment,
Fig. 3
2 shows a schematic side view of the locking and moving device according to the invention for the locking element 8 with a switching body 5 according to a second exemplary embodiment,
Fig. 4
is a schematic side view of the locking and moving device according to the invention for the locking element 8 with a switching body 6 according to a third embodiment.

Fig. 1 zeigt die an einem Drucktastenschalter 1 ausgebildete erfindungsgemäße Rast- und Verfahrvorrichtung für ein Rastelement 8 gemäß einem ersten Ausführungsbeispiel. Eine in einem Schaltergehäuse 3 linear geführte Drucktaste 2 beaufschlagt einen im wesentlichen quaderförmig ausgebildeten Schaltkörper 4. Am Schaltkörper 4 ist eine, eine herzförmige Steuerkurve 25 aufweisende Rastkulisse 7 ausgebildet. Mit der Rastkulisse 7 steht ein Rastelement 8 in Eingriff, welches einen Rastelementzapfen 9 sowie einen Rastelementschieber 10 aufweist. Der Rastelementschieber 10 ist quer zur Drucktastenführungsrichtung im Langschlitz 16 eines Schlittens 15 gleitverschiebbar gelagert. Anstelle des Rastelementschiebers 10 könnte im übrigen auch eine lateral verschwenkbare, gebogene Drahtfeder am Schlitten 15 angeordnet werden. Der Schlitten 15 ist außerdem in einer Nut zwischen dem Schaltkörper 4 und einer Gehäusewandung des Schaltergehäuses 3 in Drucktastenführungsrichtung gleitverschiebbar gelagert. Zwei zweiarmige Hebel 11 sind jeweils über Hebeldrehpunkte 14 an gegenüberliegenden Teilen des Schaltergehäuses 3 in Form eines Drehgelenks angelenkt. Das freie Ende eines ersten Hebelarms 12 weist einen ersten Drehgelenkzapfen 18 auf, der mit einem am Schaltkörper 4 ausgebildeten ersten Schubgelenklangloch 20 in Eingriff steht. Hierdurch wird eine Gelenkkombination aus einem Drehgelenk und einem Schubgelenk gebildet. Die freien Enden von zweiten Hebelarmen 13 weisen einen zweiten Drehgelenkzapfen 19 auf, welcher mit einem zweiten Schubgelenklangloch 21 in Eingriff steht. Das hierbei gebildete Gelenk 17 ist ebenfalls eine Gelenkkombination aus einem Drehgelenk und einem Schubgelenk. Vorliegend sind die Hebelarme 12,13 gleichlang ausgebildet. Über eine entsprechende Variation der Längen der Hebelarme 12,13 kann jedoch auch das Verhältnis Drucktastenhub/Rastelementhub anforderungsgemäß verändert werden.1 shows the latching and moving device according to the invention for a latching element 8 formed on a pushbutton switch 1 according to a first exemplary embodiment. A pushbutton 2, which is guided linearly in a switch housing 3, acts on an essentially cuboid switching body 4. On the switching body 4 is a locking link 7 having a heart-shaped control curve 25. A locking element 8 is in engagement with the locking link 7, which has a locking element pin 9 and a locking element slide 10. The locking element slide 10 is slidably mounted transversely to the pushbutton guide direction in the elongated slot 16 of a slide 15. Instead of the locking element slide 10, a laterally pivotable, curved wire spring could also be arranged on the slide 15. The carriage 15 is also slidably mounted in a groove between the switch body 4 and a housing wall of the switch housing 3 in the push button guide direction. Two two-armed levers 11 are each articulated via pivot points 14 on opposite parts of the switch housing 3 in the form of a swivel joint. The free end of a first lever arm 12 has a first pivot pin 18, which is in engagement with a first sliding joint elongated hole 20 formed on the switching body 4. In this way, a joint combination of a swivel joint and a thrust joint is formed. The free ends of second lever arms 13 have a second pivot pin 19, which is in engagement with a second sliding joint elongated hole 21. The joint 17 formed here is also a joint combination of a swivel joint and a sliding joint. In the present case, the lever arms 12, 13 are of equal length. The ratio of push button stroke / locking element stroke can, however, be changed as required by corresponding variation of the lengths of the lever arms 12, 13.

Zur Rückstellung der Drucktaste 2 dient eine Drucktastenrückstellfeder 26, welche mit einem Ende in einer Ausnehmung des Schaltkörpers 4 gelagert ist, und welche mit einem anderen Ende auf einer Leiterplatte 29 sich abstützt. Eine zur Kontaktierung von Kontakten auf der Leiterplatte 29 dienende Kontaktbrücke 27 ist mittels einer Kontaktbrückendruckfeder 28 in einem Kontaktbrückendruckfederaufnahmeschacht 30 federnd gelagert. Zur Beleuchtung der Drucktaste 2 ist eine Leuchtdiode 31 vorgesehen.To reset the pushbutton 2, a pushbutton return spring 26 is used, which is supported at one end in a recess in the switching body 4, and which with another end is supported on a circuit board 29. A contact bridge 27 used for contacting contacts on the printed circuit board 29 is spring-mounted in a contact bridge pressure spring receiving shaft 30 by means of a contact bridge compression spring 28. A light-emitting diode 31 is provided for illuminating the pushbutton 2.

Fig. 2 zeigt eine Aufsicht auf die erfindungsgemäße Rast- und Verfahrvorrichtung des Drucktastenschalters 1 bei abgenommener Drucktaste 2.FIG. 2 shows a top view of the locking and moving device according to the invention of the pushbutton switch 1 with the pushbutton 2 removed.

Fig. 3 zeigt ein zweites Ausführungsbeispiel der erfindungsgemäßen Rast- und Verfahrvorrichtung für das Rastelement 8, bei welchem ein Schaltkörper 5 scheibenförmig ausgebildet ist und um einen Drehpunkt 23 drehbar an Teilen des Schaltergehäuses 2 gelagert ist. An der Peripherie des in Seitenansicht kreisförmigen Schaltkörpers 5 ist ein Schaltnocken 22 vorgesehen, über welchen die Betätigungskraft F der in Drucktastenführungsrichtung translatorisch bewegten Drucktaste 2 eine rotatorische Bewegung des Schaltkörpers 5 hervorruft. Sobald der Schaltkörper 5 über den Schaltnocken 22 in eine Rotationsbewegung um den Drehpunkt 23 versetzt wird, bewegt sich die Rastkulisse 7 und damit ein Teil der Steuerkurve 25 auf den Rastelementzapfen 9 des Rastelments 8 zu. Der Rastelementzapfen 9 seinerseits bewegt sich ebenfalls diesem Stück der Steuerkurve 25 gegenläufig entgegen, da er über den Schlitten 15 und den zweiarmigen Hebel 11 gegensinnig zur Drucktastenführungsrichtung verfahren wird. Um die im wesentlichen herzförmig ausgebildete Steuerkurve 25 der Rastkulisse 7 auch horizontal durchfahren zu können, ist das Rastelement 8 in einem Langschlitz des Schlittens 15 gleitverschiebbar gelagert.Fig. 3 shows a second embodiment of the locking and moving device according to the invention for the locking element 8, in which a switching body 5 is disc-shaped and is rotatably mounted about a pivot point 23 on parts of the switch housing 2. On the periphery of the switching body 5, which is circular in side view, a switching cam 22 is provided, by means of which the actuating force F of the pushbutton 2, which is moved translationally in the pushbutton guide direction, causes a rotary movement of the switching body 5. As soon as the switching body 5 is set into a rotational movement about the pivot point 23 via the switching cam 22, the latching link 7 and thus part of the control cam 25 moves towards the latching element pin 9 of the latching element 8. The locking element pin 9 in turn likewise moves this piece of the control cam 25 in the opposite direction, since it is moved in the opposite direction to the push button guide direction via the slide 15 and the two-armed lever 11. In order to be able to also drive horizontally through the essentially heart-shaped control cam 25 of the locking link 7, the locking element 8 is slidably mounted in an elongated slot of the slide 15.

Die übrige Ausbildung der erfindungsgemäßen Rast- und Verfahrvorrichtung entspricht der Anordnung gemäß dem ersten Ausführungsbeispiel.The rest of the design of the locking and moving device according to the invention corresponds to the arrangement according to the first embodiment.

Fig. 4 zeigt ein drittes Ausführungsbeispiel der erfindungsgemäßen Rast- und Verfahrvorrichtung mit einem als einarmiger Hebel ausgebildeten Schaltkörper 6. Der Schaltkörper 6 ist um einen Drehpunkt 24, welcher an Teilen des Schaltergehäuses 2 drehbar gelagert ist, schwenkbar. Am freien Ende des Schaltkörpers 6 ist die Rastkulisse 7 ausgebildet, in welcher der im Langschlitz 16 des Schlittens 15 gleitgeführte Rastelementschieber 10 des Rastelements 8 gleitgeführt ist. Der Schlitten 15 wird wiederum über den zweiarmigen Hebel 11, wie zu Fig. 1 ausgeführt, an Teilen des Schaltkörpers 6 oder an Teilen der Drucktaste 2 angelenkt, um die zur Drucktaste 2 gegensinnige Bewegung zu gewährleisten.Fig. 4 shows a third embodiment of the locking and moving device according to the invention with a switching body 6 designed as a one-armed lever. The switching body 6 is pivotable about a pivot point 24, which is rotatably mounted on parts of the switch housing 2. At the free end of the switch body 6, the latching link 7 is formed, in which the latching element slide 10 of the latching element 8, which is slidably guided in the elongated slot 16 of the carriage 15, is slidably guided. The carriage 15 is in turn articulated via the two-armed lever 11, as shown in FIG. 1, to parts of the switch body 6 or to parts of the push button 2 in order to ensure the movement in the opposite direction to the push button 2.

Die Funktionsweise der erfindungsgemäßen Rast- und Verfahrvorrichtung soll nunmehr anhand des Ausführungsbeispiels zu Fig. 1 näher beschrieben werden. Durch Drücken der Drucktaste 2 wird der Einschalthub eingeleitet, wobei der erste Hebelarm 12 in eine untere Umkehrposition geschwenkt wird. Da der Schlitten 15 am zweiten Hebelarm 13 des zweiarmigen Hebels 11 angelenkt ist, wird er hierbei in eine obere Umlenkposition verbracht. Hierbei gleitet der Rastelementzapfen 9 entlang der Steuerkurve 25 bis zu einem oberen Anschlagpunkt der Rastkulisse 7. Nach dem Loslassen der Drucktaste 2 gleitet der Rastelementzapfen 9 nunmehr nach unten und verharrt in einer stabilen Einschaltposition E. Damit ist der Einschalthub beendet. Durch nochmaliges Drucken der Drucktaste 2 wird der Ausschalthub eingeleitet. Hierbei bewegt sich der erste Hebelarm 12 wiederum in seine untere Schwenkposition, um dann auf einer oberen Schwenkposition zu verharren. Der zweite Hebelarm 13 hat hierbei den Schlitten 15 in den unteren Teil des Schaltergehäuses 2 bewegt, wobei der Rastelementzapfen 9 in einer unteren stabilen Ausschaltposition A zu liegen kommt. Damit ist der Ausschalthub beendet.The operation of the locking and moving device according to the invention will now be described in more detail with reference to the embodiment of FIG. 1. The switch-on stroke is initiated by pressing the pushbutton 2, the first lever arm 12 being pivoted into a lower reversing position. Since the carriage 15 is articulated on the second lever arm 13 of the two-armed lever 11, it is brought into an upper deflection position. Here, the locking element pin 9 slides along the control cam 25 to an upper stop point of the locking link 7. After releasing the pushbutton 2, the locking element pin 9 now slides down and remains in a stable switch-on position E. The switch-on stroke is ended. The switch-off stroke is initiated by pressing pushbutton 2 again. Here, the first lever arm 12 again moves into its lower pivot position, and then remain in an upper swivel position. The second lever arm 13 has in this case moved the carriage 15 into the lower part of the switch housing 2, the latching element pin 9 coming to rest in a lower stable switch-off position A. This completes the switch-off stroke.

Claims (6)

  1. Electrical push-button switch having a switch housing (3) which accommodates a push button (2) in a guided manner, the push button (2) being displaceable relative to the switch housing (3) in the push-button guiding direction by a push-button travel while acting on a switching body (4) which can be moved thereby, and having a latching device which has a latching link (7) and a latching element (8), the latching link (7) being arranged on the switching body (4) and defining a closed cam (25), and a latching element pin (9) of the latching element (8) being arranged so as to be latchable to the latching link (7) and so as to be movable to all sides along the cam (25) in a plane parallel to the latching link (7), characterized in that there is provided for the latching element (8) a mobile device (10, 11, 15, 16) which has at least one two-armed lever (11), a carriage (15) which can be moved in the direction opposite the respective push-button guiding direction and a latching element slide (10) which can be moved perpendicular to the push-button guiding direction in an elongated slot (16) of the carriage (15), a first lever arm (12) being connected to the switching body (4; 5; 6) or to the push button (2), a second lever arm (13) being connected to the carriage (15), and a lever pivot (14) being connected to the switch housing (3) via joints (17).
  2. Electrical push-button switch according to Claim 1, characterized in that the first switching body (4) which is constructed so as to be essentially parallelepiped-shaped is arranged inside the switch housing (3) so as to be linearly movable in the push-button guiding direction by a push-button travel.
  3. Electrical push-button switch according to Claim 1, characterized in that the second switching body (5) is constructed so as to be substantially disc-shaped, in that it is provided with an operating cam (22) for the push button (2) to act on, and in that it is mounted on the switch housing (3) so as to be rotatable about a switching body pivot (23).
  4. Electrical push-button switch according to Claim 1, characterized in that the third switching body (6) has substantially the shape of a one-armed lever which is mounted so as to be rotatable about a switching body pivot (24) and whose free end is constructed as a latching link (7).
  5. Electrical push-button switch according to one of the preceding claims, characterized in that the mobile device (10, 11, 15, 16) has two two-armed levers (11) which can be swivelled synchronized and parallel, the respective first lever arm (12) of which is articulated on parts of the switching body (4; 5; 6) or on parts of the push button (2).
  6. Electrical push-button switch according to one of the preceding claims, characterized in that the joints (17) are constructed in each case as joint combinations of a rotating joint and a sliding joint, rotating joint pins (18, 19) rotating and sliding in sliding-joint elongated holes (20, 21).
EP90113108A 1989-07-14 1990-07-09 Electric key switch with a locking device Expired - Lifetime EP0407949B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3923212A DE3923212A1 (en) 1989-07-14 1989-07-14 ELECTRIC PUSH BUTTON SWITCH WITH A LATCHING DEVICE
DE3923212 1989-07-14

Publications (3)

Publication Number Publication Date
EP0407949A2 EP0407949A2 (en) 1991-01-16
EP0407949A3 EP0407949A3 (en) 1992-07-01
EP0407949B1 true EP0407949B1 (en) 1994-10-26

Family

ID=6384967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90113108A Expired - Lifetime EP0407949B1 (en) 1989-07-14 1990-07-09 Electric key switch with a locking device

Country Status (3)

Country Link
EP (1) EP0407949B1 (en)
DE (2) DE3923212A1 (en)
ES (1) ES2064548T3 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7046434U (en) * 1970-12-16 1972-03-23 Swf Rau G Gmbh Push button switches with latching devices, in particular for motor vehicles
CH607859A5 (en) * 1976-05-10 1978-11-30 Siemens Ag Albis Latching device on a push-button switch having two fixed switching positions
US4354074A (en) * 1981-07-01 1982-10-12 Honeywell Inc. Alternate action mechanism
DE3611190A1 (en) * 1986-04-03 1987-10-15 Bbc Brown Boveri & Cie Safety push-button switch
DE3633701A1 (en) * 1986-10-03 1988-04-14 Kirsten Elektrotech Electrical switch

Also Published As

Publication number Publication date
ES2064548T3 (en) 1995-02-01
DE3923212A1 (en) 1991-01-24
EP0407949A2 (en) 1991-01-16
EP0407949A3 (en) 1992-07-01
DE59007548D1 (en) 1994-12-01

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