EP0160791B1 - Push button switch - Google Patents

Push button switch Download PDF

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Publication number
EP0160791B1
EP0160791B1 EP85101787A EP85101787A EP0160791B1 EP 0160791 B1 EP0160791 B1 EP 0160791B1 EP 85101787 A EP85101787 A EP 85101787A EP 85101787 A EP85101787 A EP 85101787A EP 0160791 B1 EP0160791 B1 EP 0160791B1
Authority
EP
European Patent Office
Prior art keywords
switch
pushbutton
plunger
switch according
contact
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
Application number
EP85101787A
Other languages
German (de)
French (fr)
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EP0160791A1 (en
Inventor
Karl-Heinz Bauer
Edgar Maisch
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.)
Preh GmbH
Original Assignee
Preh GmbH
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Filing date
Publication date
Application filed by Preh GmbH filed Critical Preh GmbH
Publication of EP0160791A1 publication Critical patent/EP0160791A1/en
Application granted granted Critical
Publication of EP0160791B1 publication Critical patent/EP0160791B1/en
Expired legal-status Critical Current

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    • 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
    • H01H13/60—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 with contact-driving member moved alternately in opposite directions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"

Definitions

  • the invention is based on a push button switch according to the preamble of claim 1, as is known from DE-A-3 046 831.
  • switches are used to connect or disconnect electrical lines several times. Regardless of which design or actuation principle they work in, they thus offer the operator of a device the opportunity to influence how it works. Switches are thus the interface between man and machine and they cannot be replaced by anything, even though they are also subject to technological change and have reached a very high technical level. Switches of various designs are one of the few electromechanical components in electronics that often have design requirements in addition to the switching function. Because they are arranged on the front panel of a device, they play a decisive role in determining its appearance. It is therefore not surprising that an almost unmanageable range of rotary, rocker, toggle, slide, pushbutton and push-button switches are available in all conceivable designs, colors and sizes. The switch described below belongs to the group of push button switches.
  • a push button switch with a pot-shaped housing in which a push button can be moved.
  • On the inside of the push button there is a web projecting into the inside of the switch, around which a switching plunger is pivotally and displaceably mounted.
  • the switching plunger consists of a disc and a wedge-shaped shoulder.
  • a switching rocker is pivotably mounted below the switching plunger with the help of bearing journals mounted in end shields.
  • This switch rocker has a T-like shape with a crossbar and a vertically downward-facing guide shoulder.
  • the crossbar is gable-shaped on the top to accommodate the wedge-shaped extension of the switching plunger.
  • the angle of inclination of the two gable halves corresponds to half the swivel angle of the switch rocker. In each of the two switch positions, one half of the gable is in a horizontal position.
  • Two return springs are responsible for pivoting the switching plunger, which are clamped between the switching plunger and the rocker switch on different sides of the attachment.
  • a blind hole is recessed in the guide neck of the switch rocker which receives a compression spring which is supported on the one hand on the bottom of the blind hole and on the other hand on a contact roller.
  • the bottom of the housing has two identical cam surfaces in roof-like form, on which the contact roller can slide.
  • a push button can also be moved relative to a rectangular housing.
  • An inward, wedge-shaped extension is formed on the top of the push button.
  • the tip of this approach serves as a tilt bearing for a shift plunger.
  • This consists of a disc and a downward-facing Stö-Bel.
  • the plunger interacts with a wedge-shaped tip of a rocker switch.
  • the rocker switch has a bearing journal on each side, which can rotate in a hole in the housing.
  • the wedge-shaped tip is part of a control curve of the switch rocker.
  • the control curve consists of a middle vertex, two flanks descending from this vertex and two surfaces rising from the end of the flanks.
  • the apex is at a certain distance from the bearing journal of the switching rocker, so that in the two switching positions it lies to the side of a plane defined by the bearing axis and the direction of sliding. This ensures that the plunger always hits one of the flanks.
  • a return spring is clamped between the switching plunger and the rocker switch. Due to the inclined position of the switch rocker, the preload on two opposite sides is different.
  • a spring-loaded switching pin is attached to the switching rocker, which presses on a contact rocker which is mounted such that it can be tilted about a fixed contact.
  • the object of the present invention is to further develop a push-button switch of the type mentioned at the outset such that, despite the compact design, it is constructed from as few individual parts as possible and can therefore be mass-produced at low cost, the contact force being maintained or even increased until immediately before the switchover should, so that a long electrical life is given.
  • the switch should be provided with a simple mechanical switch position indicator.
  • the push button switch shown in the figures has a two-part, rectangular housing 1 made of plastic.
  • a center contact piece 6 is injected in the middle on the housing base and on the side of the housing walls a fixed contact 7 made of an electrically conductive material.
  • the associated terminal lugs 39 protrude from the bottom of the housing base.
  • the switch is therefore suitable for installation in a printed circuit.
  • the made of metal - center contact piece 6 has a V-shaped cutting edge bearing 32, which continues in a likewise V-shaped cut 40 of the housing base so that the cut widens like a funnel towards the interior of the housing.
  • lateral, protruding guide strips 35 are integrally formed on the housing base 3, specifically on the four housing base edges.
  • a plurality of protruding locking lugs 36 are provided on the outside of the housing base 3. These locking lugs 36 cooperate with elongated holes 37, which are located in a push button 2.
  • This rectangular push button is also made of plastic and is relatively displaceable relative to the housing base 3.
  • the elongated holes 37 are recessed in two resilient side walls 41 of the push button 2.
  • the push button 2 is simply pushed over the housing base 3 until the latches 36 snap into the elongated holes 37.
  • the side walls 41 lie here between the guide strips 35. This snap connection holds the push button on the housing base.
  • the two resilient side walls 41 are formed on two opposite sides of the pot-shaped push button 2.
  • the push button itself consists of an opaque plastic.
  • a narrow window 38 through which the switch position can be visibly displayed. This is important because the push button returns to its original home position after each actuation.
  • a web 18 is formed on the inside of the push button in the sliding direction.
  • the end of the web 18 lies both in the rest position and when the push button is depressed in a V-shaped pocket 17 of a switching plunger 4.
  • the switching plunger 4 itself, which is made of plastic, consists of a U-shaped bracket seen from the broad side with an on Base part 11 integrally formed head part 12 and two laterally formed legs 13. Both legs 13 are of equal length and they run into a tapered tip 16 at the free end. Seen from the narrow side, the head part 12 has a convexly curved surface 14. On this surface there is an inscription or label from which the switch position emerges. This lettering or identification is visible in the window 38 of the push button due to the inclined position of the switching plunger in the rest position. Two marginal edges 15 of the surface 14 are rounded and reinforced.
  • a retaining pin 19 is formed on which one end supports a return spring 10 in the form of a helical spring.
  • lugs 20 are formed on both sides, which interact with the protruding projections 28 of a switching rocker 8.
  • the restoring spring 10 is arranged between the switching plunger 4 and the rocker switch 8, which is partially guided in a blind hole 26 of the rocker switch 8 and is supported on the bottom of this blind hole.
  • This return spring is designed so that it seeks to push the switching plunger and rocker switch away from each other.
  • the switching rocker 8 molded from plastic is designed in the manner of a two-armed lever with a short and a long arm.
  • the short arm here consists of two resilient side walls 21 which are formed laterally at a distance from one another. This forms a chamber 22 which is open on three sides and receives the base part 11 of the switching plunger 4.
  • the return spring 10 is arranged between the two side walls 21.
  • the side walls 21 carry inwardly directed lugs 28 which cooperate with the lugs 20 of the switching plunger.
  • the side walls On the outside, the side walls each have a spherical elevation 27 about which the rocker switch can be pivoted in a small angular range.
  • the long arm 23 of the rocker switch tapers slightly in cross section towards its end, since the rocker switch should be pivotable. If it had the same cross-section over the entire length, the long arm 23 would abut the wall of the housing base and a pivoting would thus be prevented.
  • the long arm 23 has a V-shaped cutting edge bearing 24 on the two outer sides, the boundary of which is formed by two wedge-shaped contact surfaces 9. These contact surfaces together with the cutting edge bearing protrude laterally from the long arm 23. As will be explained later, these contact surfaces 9 interact with the tips 16 of the switching plunger.
  • a recess 25 is provided in the long arm between the two cutting edge bearings 24.
  • the electrical connection between the fixed contacts 7 and the center contact piece 6 produces an E-shaped contact bridge 5 made of metal. Details of this contact system are in Figure 3 shown.
  • the contact bridge 5 has two outer snap tongues 29 and a contact tongue 30 which is longer than the snap tongues and arranged between the snap tongues and which has a tubular contact element 42 at the front end.
  • the snap and contact tongue are connected by a connecting web 31.
  • the contact bridge 5 lies with the edge of the connecting web 31 in the cutting edge bearing 32 of the center contact piece 6.
  • the edge at the free end of the snap tongue 29 lies in the cutting edge bearing 24 of the contact rocker 8.
  • the contact bridge 5 is thus clamped between these two cutting edge bearings and in an inclined position, which is caused by the fact that the preloaded return spring in the installed state tries to push the rocker and switching plunger apart, the switching plunger being pressed against the inner wall of the push button.
  • the contact tongue 30 with its contact element 42 also projects into the recess 25 of the rocker switch 8.
  • the housing base 3 has a plurality of molded-on ribs 33 on two opposite inner walls. These slide ribs extend almost to the bottom of the housing base. On the mouth side, the sliding ribs 33 are provided with run-on bevels 34 which taper towards the free end. In the embodiment shown in the figures, as shown in FIG. 1, three sliding ribs are provided on each side.
  • the tip 16 of the switching plunger 4 reaches either the right or the left contact surface 9 as the movement progresses. It is then no longer possible to jump from one side to the other without snapping the contact bridge. Finally, the edge 15 of the switching plunger abuts the bevel 34 and while the push button is pressed further, the marginal edge runs along the bevel and forcibly pivots the switching plunger toward the center. The tip 16 presses the rocker switch 8 abruptly over the contact surfaces 9 to the other side. The sliding along the edge 15 on the run-up slopes 34 and then the sliding ribs 33 represents a first positive guide for the switching plunger.
  • the push button consists of an opaque plastic, a window 38 being left free in the push button on the front side.
  • FIGS. 5 and 6 show further exemplary embodiments for a switch position indicator.
  • the push button 43 consists of a transparent plastic.
  • a cover 44 made of an opaque material is embedded in a recess on the inside of the push button and has an opening 47 through which the inscription or marking of the curved surface 14 is visible.
  • This embodiment has the advantage that the housing is sealed.
  • the pushbutton 45 of the exemplary embodiment according to FIG. 6 also consists of a transparent plastic.
  • a cap 46 is pushed over the actual pushbutton 45 and has a recess 48 on the front.
  • the inscription or marking of the curved surface 14 is visible through this recess.
  • the housing of the switch of this exemplary embodiment is thus leak-proof and protected against dust and foreign parts.

Description

Die Erfindung geht von einem Druckknopfschalter nach dem Oberbegriff des Anspruches 1 aus, wie er aus der DE-A-3 046 831 bekannt ist.The invention is based on a push button switch according to the preamble of claim 1, as is known from DE-A-3 046 831.

Im allgemeinen dienen Schalter dem mehrmaligen Verbinden oder Trennen von elektrischen Leitungswegen. Damit bieten sie, gleichgültig nach welchem Konstruktions- oder Betätigungsprinzip sie arbeiten, dem Bediener eines Gerätes die Möglichkeit, auf dessen Funktionsweise einzuwirken. Schalter sind somit Schnittstelle zwischen Mensch und Maschine und sie sind durch nichts zu ersetzen, wenngleich sie auch dem technologischen Wandel unterworfen sind und einen sehr hohen technischen Stand erreicht haben. Schalter der verschiedensten Bauformen gehören zu den wenigen elektromechanischen Bauelementen der Elektronik, bei denen zusätzlich zur Schaltfunktion oft Forderungen an das Design gestellt werden. Da sie nämlich an der Frontplatte eines Gerätes angeordnet sind, bestimmen sie in entscheidender Weise dessen Erscheinungsbild mit. Es ist daher nicht verwunderlich, daß ein nahezu unüberschaubares Angebot an Dreh-, Wipp-, Kipp-, Schiebe-, Tast- und Druckknopfschaltern in allen nur erdenklichen Bauformen, Farben und Größen angeboten werden. Der nachfolgend beschriebene Schalter ist zu der Gruppe der Druckknopfschalter zu rechnen.In general, switches are used to connect or disconnect electrical lines several times. Regardless of which design or actuation principle they work in, they thus offer the operator of a device the opportunity to influence how it works. Switches are thus the interface between man and machine and they cannot be replaced by anything, even though they are also subject to technological change and have reached a very high technical level. Switches of various designs are one of the few electromechanical components in electronics that often have design requirements in addition to the switching function. Because they are arranged on the front panel of a device, they play a decisive role in determining its appearance. It is therefore not surprising that an almost unmanageable range of rotary, rocker, toggle, slide, pushbutton and push-button switches are available in all conceivable designs, colors and sizes. The switch described below belongs to the group of push button switches.

Aus der DE-A-3151 501 ist bereits ein Druckknopfschalter mit einem topfförmigen Gehäuse bekannt, in dem ein Druckknopf verschiebbar ist. Auf der Innenseite des Druckknopfes ist ein in das Schalterinnere ragender Steg vorgesehen, um den ein Schaltstößel schwenkbar und verschiebbar gelagert ist. Der Schaltstößel besteht aus einer Scheibe und einem keilförmigen Ansatz. Unabhängig vom Druckknopf ist unterhalb des Schaltstößels eine Umschaltwippe mit Hilfe von in Lagerschilden gelagerten Lagerzapfen verschwenkbar gelagert. Diese Umschaltwippe besitzt eine T-artige Gestalt mit einem Querbalken und einem senkrecht nach unten weisenden Führungsansatz. Der Querbalken ist auf der Oberseite giebelförmig gestaltet zur Aufnahme des keilförmigen Ansatzes des Schaltstößels. Der Neigungswinkel der beiden Giebelhälften entspricht dem halben Schwenkwinkel der Umschaltwippe. In den beiden Schaltstellungen nimmt jeweils eine Giebelhälfte eine waagrechte Lage ein. Für das Verschwenken des Schaltstößels sind zwei Rückstellfedern verantwortlich, die auf verschiedenen Seiten des Ansatzes zwischen Schaltstößel und Umschaltwippe eingespannt sind. Im Führungsansatz der Umschaltwippe ist ein Sackloch ausgespart, das eine Druckfeder aufnimmt, die sich einerseits am Boden des Sackloches und andererseits an einer Kontaktwalze abstützt. Der Boden des Gehäuses besitzt zwei identische Steuerkurvenflächen in dach-artiger Form, auf denen die Kontaktwalze entlanggleiten kann.From DE-A-3151 501 a push button switch with a pot-shaped housing is already known, in which a push button can be moved. On the inside of the push button there is a web projecting into the inside of the switch, around which a switching plunger is pivotally and displaceably mounted. The switching plunger consists of a disc and a wedge-shaped shoulder. Regardless of the push button, a switching rocker is pivotably mounted below the switching plunger with the help of bearing journals mounted in end shields. This switch rocker has a T-like shape with a crossbar and a vertically downward-facing guide shoulder. The crossbar is gable-shaped on the top to accommodate the wedge-shaped extension of the switching plunger. The angle of inclination of the two gable halves corresponds to half the swivel angle of the switch rocker. In each of the two switch positions, one half of the gable is in a horizontal position. Two return springs are responsible for pivoting the switching plunger, which are clamped between the switching plunger and the rocker switch on different sides of the attachment. A blind hole is recessed in the guide neck of the switch rocker which receives a compression spring which is supported on the one hand on the bottom of the blind hole and on the other hand on a contact roller. The bottom of the housing has two identical cam surfaces in roof-like form, on which the contact roller can slide.

Auch bei dem Druckknopfschalter nach der DE-A-3 046 831 ist relativ zu einem rechteckigen Gehäuse ist ein Druckknopf verschiebbar. An der Oberseite des Druckknopfes ist ein nach innen gerichteter, keilförmiger Ansatz ausgebildet. Die Spitze dieses Ansatzes dient als Kipplager für einen Schaltstößel. Dieser besteht aus einer Scheibe und einem nach unten gerichteten Stö-Bel. Der Stößel wirkt mit einer keilförmigen Spitze einer Umschaltwippe zusammen. Die Umschaltwippe besitzt auf jeder Seite jeweils einen Lagerzapfen, der sich in einer Bohrung des Gehäuses drehen kann. Die keilförmige Spitze ist Teil einer Steuerkurve der Umschaltwippe. Die Steuerkurve besteht aus einem mittleren Scheitel, zwei von diesem Scheitel abfallenden Flanken und zwei vom Ende der Flanken aufsteigenden Flächen. Der Scheitel besitzt einen gewissen Abstand von den Lagerzapfen der Umschaltwippe, so daß er in den beiden Schaltstellungen jeweils seitlich einer durch die Lagerachse und die Schieberichtung definierten Ebene liegt. Damit ist sichergestellt, daß der Stößel immer auf eine der Flanken trifft. Zwischen Schaltstößel und Umschaltwippe ist eine Rückstellfeder eingespannt. Bedingt durch die Schrägstellung der Umschaltwippe ist die Vorspannung an zwei gegenüberliegenden Seiten unterschiedlich groß. An der Umschaltwippe ist ein federbelasteter Schaltbolzen befestigt, der auf eine Kontaktwippe drückt, die um einen Festkontakt kippbar gelagert ist.In the push button switch according to DE-A-3 046 831, a push button can also be moved relative to a rectangular housing. An inward, wedge-shaped extension is formed on the top of the push button. The tip of this approach serves as a tilt bearing for a shift plunger. This consists of a disc and a downward-facing Stö-Bel. The plunger interacts with a wedge-shaped tip of a rocker switch. The rocker switch has a bearing journal on each side, which can rotate in a hole in the housing. The wedge-shaped tip is part of a control curve of the switch rocker. The control curve consists of a middle vertex, two flanks descending from this vertex and two surfaces rising from the end of the flanks. The apex is at a certain distance from the bearing journal of the switching rocker, so that in the two switching positions it lies to the side of a plane defined by the bearing axis and the direction of sliding. This ensures that the plunger always hits one of the flanks. A return spring is clamped between the switching plunger and the rocker switch. Due to the inclined position of the switch rocker, the preload on two opposite sides is different. A spring-loaded switching pin is attached to the switching rocker, which presses on a contact rocker which is mounted such that it can be tilted about a fixed contact.

Aufgabe der vorliegenden Erfindung ist es, einen Druckknopfschalter nach der eingangs genannten Art so weiterzuentwickeln, daß er trotz gedrängter Bauweise aus möglichst wenigen Einzelteilen aufgebaut und daher als Massenprodukt kostengünstig herstellbar ist, wobei die Kontaktkraft bis unmittelbar vor dem Umschalten erhalten bzw. sogar noch gesteigert werden soll, so daß eine hohe elektrische Lebensdauer gegeben ist. Außerdem soll der Schalter mit einer einfachen mechanischen Schaltstellungsanzeige versehbar sein.The object of the present invention is to further develop a push-button switch of the type mentioned at the outset such that, despite the compact design, it is constructed from as few individual parts as possible and can therefore be mass-produced at low cost, the contact force being maintained or even increased until immediately before the switchover should, so that a long electrical life is given. In addition, the switch should be provided with a simple mechanical switch position indicator.

Diese Aufgabe wird erfindungsgemäß durch die im kennzeichnenden Teil des Anspruches 1 angegebenen Merkmale gelöst.This object is achieved by the features specified in the characterizing part of claim 1.

Vorteilhafte Ausgestaltungen sind in den Unteransprüchen angegeben.Advantageous refinements are specified in the subclaims.

Die Erfindung wird nachfolgend für ein Ausführungsbeispiel anhand der Zeichnungen näher beschrieben.The invention is described below for an embodiment with reference to the drawings.

Von den Figuren zeigt

  • Figur 1 in perspektivischer Seitenansicht einen Druckknopfschalter in Explosionsdarstellung,
  • Figur 2 eine Seitenansicht des Druckknopfschalters im Schnitt,
  • Figur 3 in Perspektivansicht im vergrößerten Maßstab eine Einzelheit des Druckknopfschalters,
  • Figur 4 in Perspektivansicht im vergrößerten Maßstab einen Schaltstößel und eine Schaltwippe,
  • Figur 5 im vergrößerten Maßstab einen anderen Druckknopfschalter teilweise abgebrochen in Seitenansicht im Schnitt,
  • Figur 6 im vergrößerten Maßstab eine andere Ausführungsform eines Druckknopfschalters teilweise abgebrochen in Seitenansicht im Schnitt.
From the figures shows
  • FIG. 1 shows a perspective side view of a push button switch in an exploded view,
  • FIG. 2 shows a side view of the push-button switch in section,
  • FIG. 3 shows a perspective view on an enlarged scale of a detail of the push-button switch,
  • FIG. 4 shows a switching tappet and a switching rocker in a perspective view on an enlarged scale,
  • Figure 5 on an enlarged scale, another push button switch partially broken into ten view in section,
  • Figure 6 on an enlarged scale another embodiment of a push button switch partially broken away in side view in section.

Der in den Figuren dargestellte Druckknopfschalter besitzt ein zweiteiliges, rechteckförmiges Gehäuse 1 aus Kunststoff. In dem topfförmigen Gehäusesockel 3 sind am Gehäuseboden in der Mitte ein Mittelkontaktstück 6 und seitlich an den Gehäusewandungen je ein Festkontakt 7 aus einem elektrisch leitenden Material mit eingespritzt. Die zugehörigen Anschlußfahnen 39 ragen unten aus dem Gehäusesockel heraus. Der Schalter ist somit für den Einbau in eine gedruckte Schaltung geeingnet. Das aus Metall hergestellte - Mittelkontaktstück 6 besitzt ein V-förmiges Schneidenlager 32, das sich in einem ebenfalls V-förmigen Einschnitt 40 des Gehäusesockelbodens fortsetzt derart, daß der Einschnitt zum Gehäuseinneren hin sich trichterartig erweitert.The push button switch shown in the figures has a two-part, rectangular housing 1 made of plastic. In the pot-shaped housing base 3, a center contact piece 6 is injected in the middle on the housing base and on the side of the housing walls a fixed contact 7 made of an electrically conductive material. The associated terminal lugs 39 protrude from the bottom of the housing base. The switch is therefore suitable for installation in a printed circuit. The made of metal - center contact piece 6 has a V-shaped cutting edge bearing 32, which continues in a likewise V-shaped cut 40 of the housing base so that the cut widens like a funnel towards the interior of the housing.

Wie aus Figur 1 unten zu erkennen ist, sind an den Gehäusesockel 3 und zwar an den vier Gehäusesockelkanten seitliche, vorstehende Führungsleisten 35 angeformt. Außerdem sind auf der Außenseite des Gehäusesockels 3 mehrere vorstehende Rastnasen 36 vorgesehen. Diese Rastnasen 36 wirken mit Langlöchern 37 zusammen, die sich in einem Druckknopf 2 befinden. Dieser rechteckförmige Druckknopf ist ebenfalls aus Kunststoff hergestellt und er ist gegenüber dem Gehäusesockel 3 relativ verschiebbar. Die Langlöcher 37 sind in zwei federnden Seitenwänden 41 des Druckknopfes 2 ausgespart. Bei der Montage wird der Druckknopf 2 einfach über den Gehäusesockel 3 geschoben, bis die Rastnasen 36 in die Langlöcher37 einschnappen. Die Seitenwände 41 liegen hierbei zwischen den Führungsleisten 35. Durch diese Rastverbindung wird der Druckknopf an dem Gehäusesockel festgehalten.As can be seen from FIG. 1 below, lateral, protruding guide strips 35 are integrally formed on the housing base 3, specifically on the four housing base edges. In addition, a plurality of protruding locking lugs 36 are provided on the outside of the housing base 3. These locking lugs 36 cooperate with elongated holes 37, which are located in a push button 2. This rectangular push button is also made of plastic and is relatively displaceable relative to the housing base 3. The elongated holes 37 are recessed in two resilient side walls 41 of the push button 2. During assembly, the push button 2 is simply pushed over the housing base 3 until the latches 36 snap into the elongated holes 37. The side walls 41 lie here between the guide strips 35. This snap connection holds the push button on the housing base.

Die beiden federnden Seitenwände 41 sind an zwei gegenüberliegenden Seiten des topfförmigen Druckknopfes 2 angeformt. Der Druckknopf selbst besteht bei dem in den Figuren 1 bis 4 dargestellten Ausführungsbeispiel aus einem lichtundurchlässigen Kunststoff. An der Frontseite des Druckknopfes befindet sich ein schmales Fenster 38, durch das die Schaltstellung sichtbar angezeigt werden kann. Dies ist deshalb von Bedeutung, da der Druckknopf nach jeder Betätigung wieder in seine alte Ausgangsruhestellung zurückkehrt.The two resilient side walls 41 are formed on two opposite sides of the pot-shaped push button 2. In the embodiment shown in FIGS. 1 to 4, the push button itself consists of an opaque plastic. At the front of the push button there is a narrow window 38 through which the switch position can be visibly displayed. This is important because the push button returns to its original home position after each actuation.

An den beiden Seiten, an denen sich keine Seitenwände 41 befinden, sind, wie aus Figur 1 oben erkennbar ist, im Inneren des Druckknopfes in Schieberichtung je ein Steg 18 an der Innenwand angeformt. Das Ende des Steges 18 liegt sowohl in der Ruhestellung als auch beim Niederdrücken des Druckknopfes in einer V-förmigen Tasche 17 eines Schaltstößels 4. Der aus Kunststoff hergestellte Schaltstößel 4 selbst besteht aus einem von der Breitseite aus gesehenen U-förmigen Bügel mit einem an ein Basisteil 11 angeformten Kopfteil 12 und zwei seitlich angeformten Schenkeln 13. Beide Schenkel 13 sind gleich lang und sie laufen am freien Ende in eine sich verjüngende Spitze 16 aus. Von der Schmalseite aus gesehen weist der Kopfteil 12 eine konvex gewölbte Oberfläche 14 auf. Auf dieser Oberfläche befindet sich eine Beschriftung oder Kennzeichnung, aus der die Schaltstellung hervorgeht. Diese Beschriftung oder Kennzeichnung ist, bedingt durch die Schrägstellung des Schaltstößels in der Ruhestellung, in dem Fenster 38 des Druckknopfes sichtbar. Zwei Randkanten 15 der Oberfläche 14 sind abgerundet und verstärkt.On the two sides on which there are no side walls 41, as can be seen from FIG. 1 above, a web 18 is formed on the inside of the push button in the sliding direction. The end of the web 18 lies both in the rest position and when the push button is depressed in a V-shaped pocket 17 of a switching plunger 4. The switching plunger 4 itself, which is made of plastic, consists of a U-shaped bracket seen from the broad side with an on Base part 11 integrally formed head part 12 and two laterally formed legs 13. Both legs 13 are of equal length and they run into a tapered tip 16 at the free end. Seen from the narrow side, the head part 12 has a convexly curved surface 14. On this surface there is an inscription or label from which the switch position emerges. This lettering or identification is visible in the window 38 of the push button due to the inclined position of the switching plunger in the rest position. Two marginal edges 15 of the surface 14 are rounded and reinforced.

In der Mitte des Basisteils 11 zwischen den beiden Schenkeln 13 ist noch ein Haltezapfen 19 angeformt, an dem sich ein Ende eine Rückstellfeder 10 in der Form einer Schraubenfeder abstützt.In the middle of the base part 11 between the two legs 13, a retaining pin 19 is formed on which one end supports a return spring 10 in the form of a helical spring.

Am mündungsseitigen Ende der V-förmigen Tasche 17 des Schaltstößels 4 sind zu beiden Seiten Nasen 20 angeformt, die mit vorstehenden Ansätzen 28 einer Schaltwippe 8 zusammenwirken.At the mouth end of the V-shaped pocket 17 of the switching plunger 4, lugs 20 are formed on both sides, which interact with the protruding projections 28 of a switching rocker 8.

Zwischen Schaltstößel 4 und Schaltwippe 8 ist die Rückstellfeder 10 angeordnet, wobei diese teilweise in einem Sackloch 26 der Schaltwippe 8 geführt ist und sich am Boden dieses Sackloches abstützt. Diese Rückstellfeder ist so ausgeführt, daß sie danach trachtet, Schaltstößel und Schaltwippe voneinander weg zu drücken.The restoring spring 10 is arranged between the switching plunger 4 and the rocker switch 8, which is partially guided in a blind hole 26 of the rocker switch 8 and is supported on the bottom of this blind hole. This return spring is designed so that it seeks to push the switching plunger and rocker switch away from each other.

Die aus Kunststoff gespritzte Schaltwippe 8 ist in der Art eines zweiarmigen Hebels mit einem kurzen und einem langen Arm ausgebildet. Der kurze Arm besteht hierbei aus zwei federnden Seitenwänden 21, die im Abstand voneinander seitlich angeformt sind. Dadurch wird eine auf drei Seiten offene Kammer 22 gebildet, die das Basisteil 11 des Schaltstößels 4 aufnimmt. Außerdem ist zwischen beiden Seitenwänden 21 noch die Rückstellfeder 10 angeordnet. An jeweils zwei Ecken tragen die Seitenwände 21 nach innen aufeinander zu gerichtete Ansätze 28, die mit den Nasen 20 des Schaltstößels zusammenwirken. Außenseitig besitzen die Seitenwände je eine ballige Erhebung 27, um die die Schaltwippe in einem kleinen Winkelbereich schwenkbar ist.The switching rocker 8 molded from plastic is designed in the manner of a two-armed lever with a short and a long arm. The short arm here consists of two resilient side walls 21 which are formed laterally at a distance from one another. This forms a chamber 22 which is open on three sides and receives the base part 11 of the switching plunger 4. In addition, the return spring 10 is arranged between the two side walls 21. At two corners, the side walls 21 carry inwardly directed lugs 28 which cooperate with the lugs 20 of the switching plunger. On the outside, the side walls each have a spherical elevation 27 about which the rocker switch can be pivoted in a small angular range.

Der lange Arm 23 der Schaltwippe verjüngt sich etwas im Querschnitt zu seinem Ende hin, da die Schaltwippe schwenkbar sein soll. Hätte sie über die ganze Länge den gleichen Querschnitt, so würde der lange Arm 23 an der Wandung des Gehäusesockels anstoßen und eine Schwenkung würde so verhindert.The long arm 23 of the rocker switch tapers slightly in cross section towards its end, since the rocker switch should be pivotable. If it had the same cross-section over the entire length, the long arm 23 would abut the wall of the housing base and a pivoting would thus be prevented.

Am freien Ende besitzt der lange Arm 23 an den beiden Außenseiten ein V-förmiges Schneidenlager 24, dessen Begrenzung von zwei keilförmigen Anlageflächen 9 gebildet wird. Diese Anlageflächen zusammen mit dem Schneidenlager ragen aus dem langen Arm 23 seitlich hervor. Wie später noch erläutert werden wird, wirken diese Anlageflächen 9 mit den Spitzen 16 des Schaltstößels zusammen. Zwischen den beiden Schneidenlagern 24 ist eine Aussparung 25 im langen Arm vorgesehen.At the free end, the long arm 23 has a V-shaped cutting edge bearing 24 on the two outer sides, the boundary of which is formed by two wedge-shaped contact surfaces 9. These contact surfaces together with the cutting edge bearing protrude laterally from the long arm 23. As will be explained later, these contact surfaces 9 interact with the tips 16 of the switching plunger. A recess 25 is provided in the long arm between the two cutting edge bearings 24.

Die elektrische Verbindung zwischen den Festkontakten 7 und dem Mittelkontaktstück 6 stellt eine E-förmige Kontaktbrücke 5 aus Metall her. Einzelheiten dieses Kontaktsystems sind in Figur 3 dargestellt. Die Kontaktbrücke 5 besitzt zwei äußere Schnappzungen 29 und eine gegenüber den Schnappzungen längere und zwischen den Schnappzungen angeordnete Kontaktzunge 30, die am vorderen Ende ein rohrförmig gestaltetes Kontaktelement 42 aufweist. Verbunden sind Schnapp- und Kontaktzunge durch einen Verbindungssteg 31. Wie aus Figur 3 hervorgeht, liegt die Kontaktbrücke 5 mit dem Rand des Verbindungssteges 31 in dem Schneidenlager 32 des Mittelkontaktstücks 6. Die Kante am freien Ende der Schnappzunge 29 liegt in dem Schneidenlager 24 der Kontaktwippe 8. Die Kontaktbrücke 5 ist somit zwischen diesen beiden Schneidenlagern eingespannt und zwar in einer Schräglage, die dadurch hervorgerufen ist, daß die im eingebauten Zustand vorgespannte Rückstellfeder Kontaktwippe und Schaltstößel auseinanderzudrücken versucht, wobei der Schaltstößel gegen die Innenwandung des Druckknopfes gedrückt wird. Die Kontaktzunge 30 mit ihrem Kontaktelement 42 ragt im übrigen in die Aussparung 25 der Schaltwippe 8.The electrical connection between the fixed contacts 7 and the center contact piece 6 produces an E-shaped contact bridge 5 made of metal. Details of this contact system are in Figure 3 shown. The contact bridge 5 has two outer snap tongues 29 and a contact tongue 30 which is longer than the snap tongues and arranged between the snap tongues and which has a tubular contact element 42 at the front end. The snap and contact tongue are connected by a connecting web 31. As can be seen from FIG. 3, the contact bridge 5 lies with the edge of the connecting web 31 in the cutting edge bearing 32 of the center contact piece 6. The edge at the free end of the snap tongue 29 lies in the cutting edge bearing 24 of the contact rocker 8. The contact bridge 5 is thus clamped between these two cutting edge bearings and in an inclined position, which is caused by the fact that the preloaded return spring in the installed state tries to push the rocker and switching plunger apart, the switching plunger being pressed against the inner wall of the push button. The contact tongue 30 with its contact element 42 also projects into the recess 25 of the rocker switch 8.

Nach Figur 2 besitzt der Gehäusesockel 3 an zwei gegenüberliegenden Innenwänden mehrere angeformte Gleitrippen 33. Diese Gleitrippen erstrecken sich nahezu bis zum Boden des Gehäusesockels. Mündungsseitig sind die Gleitrippen 33 mit Anlaufschrägen 34 versehen, die sich zum freien Ende hin verjüngen. Bei dem in den Figuren dargestellten Ausführungsbeispiel sind, wie Figur 1 zeigt, auf jeder Seite je drei Gleitrippen vorgesehen.According to FIG. 2, the housing base 3 has a plurality of molded-on ribs 33 on two opposite inner walls. These slide ribs extend almost to the bottom of the housing base. On the mouth side, the sliding ribs 33 are provided with run-on bevels 34 which taper towards the free end. In the embodiment shown in the figures, as shown in FIG. 1, three sliding ribs are provided on each side.

Aus Figur 2 ist zu erkennen, daß die Schaltwippe 8 mit ihren balligen Erhebungen 27 an den Gleitrippen 33 des Gehäusesockels 3 anliegt. Um diese Erhebungen ist die Schaltwippe in einem kleinen Winkelbereich schwenkbar. Wie bereits erwähnt, befinden sich in der Ruhestellung sowohl die Schaltwippe 8 als auch der Schaltstößel 4 in einer Schräglage (Figur 2). Drückt man nun den Druckknopf nach unten, so wird auch der Schaltstößel 4 in der Schräglage nach unten bewegt. Die Mitnahme des Schaltstößels 4 erfolgt durch den Steg 18, dessen Ende sich am Boden der V-förmigen Tasche 17 abstützt. Beim Zusammendrücken der Rückstellfeder 10 erhöht sich auch der Druck, mit dem das Kontaktelement 42 gegen den Festkontakt 7 gedrückt wird. Beim Niederdrücken des Druckknopfes gelangt mit fortschreitender Bewegung die Spitze 16 des Schaltstößels 4 entweder an die rechte oder an die linke Anlagefläche 9. Ein Überspringen von einer Seite zur anderen ohne Umschnappen der Kontaktbrücke ist dann nicht mehr möglich. Schließlich liegt die Randkante 15 des Schaltstößels an der Anlaufschräge 34 an und während des weiteren Niederdrückens des Druckknopfes läuft die Randkante an der Anlaufschräge entlang und schwenkt den Schaltstößel zwangsweise zur Mitte zu. Dabei drückt die Spitze 16 die Schaltwippe 8 über die Anlageflächen 9 schlagartig auf die andere Seite. Das Entlanggleiten der Randkante 15 an den Anlaufschrägen 34 und anschließend den Gleitrippen 33 stellt eine erste Zwangsführung für den Schaltstößel dar.From Figure 2 it can be seen that the switching rocker 8 rests with its convex elevations 27 on the sliding ribs 33 of the housing base 3. The rocker switch can be swiveled around these elevations in a small angular range. As already mentioned, both the rocker switch 8 and the switching plunger 4 are in an inclined position in the rest position (FIG. 2). If you now press the push button down, the switch plunger 4 is also moved downward in the inclined position. The switching plunger 4 is carried along by the web 18, the end of which is supported on the bottom of the V-shaped pocket 17. When the return spring 10 is compressed, the pressure with which the contact element 42 is pressed against the fixed contact 7 also increases. When the push button is depressed, the tip 16 of the switching plunger 4 reaches either the right or the left contact surface 9 as the movement progresses. It is then no longer possible to jump from one side to the other without snapping the contact bridge. Finally, the edge 15 of the switching plunger abuts the bevel 34 and while the push button is pressed further, the marginal edge runs along the bevel and forcibly pivots the switching plunger toward the center. The tip 16 presses the rocker switch 8 abruptly over the contact surfaces 9 to the other side. The sliding along the edge 15 on the run-up slopes 34 and then the sliding ribs 33 represents a first positive guide for the switching plunger.

Wird der Druckknopf losgelassen, so geht er, bedingt durch die Rückstellfeder, von der Schaltstellung in die Ausgangsruhestellung zurück. Hierbei stoßen die Nasen 20 des Schaltstößels an den Ansätzen 28 der Schaltwippe. an und es erfolgt eine Zwangsdrehung des Schaltstößels, so daß die Spitze 16 beim erneuten Niederdrücken des Druckknopfes an der anderen Anlagefläche 9 zum Anliegen kommt. Das Zwangsdrehen des Schaltstößels stellt somit eine zweite Zwangsführung für den Schaltstößel dar.When the push button is released, it returns from the switch position to the initial rest position due to the return spring. Here, the lugs 20 of the switching plunger abut the lugs 28 of the switching rocker. and there is a forced rotation of the switching plunger, so that the tip 16 comes to rest on the other contact surface 9 when the push button is depressed again. The forced rotation of the shift plunger thus represents a second forced guidance for the shift plunger.

Durch die in Ruhestellung des Druckknopfes vorgesehene Schrägstellung des Schaltstößels ist eine äußerst einfache Schaltstellungsanzeige möglich. Bei den in den Figuren 1 bis 4 dargestellten Ausführungsbeispiel besteht der Druckknopf aus einem undurchsichtigen Kunststoff, wobei auf der Frontseite im Druckknopf ein Fenster 38 ausgespart ist.Due to the inclined position of the switching plunger provided in the rest position of the push button, an extremely simple switching position display is possible. In the exemplary embodiment illustrated in FIGS. 1 to 4, the push button consists of an opaque plastic, a window 38 being left free in the push button on the front side.

Die Figuren 5 und 6 zeigen weitere Ausführungsbeispiele für eine Schaltstellungsanzeige. Bei dem in Figur 5 dargestellten Beispiel besteht der Druckknopf 43 aus einem durchsichtigen Kunststoff. Auf der Innenseite des Druckknopfes ist in einer Vertiefung eine Abdeckung 44 aus einem undurchsichtigen Material eingelassen, die eine Öffnung 47 aufweist, durch die die Beschriftung oder Kennzeichnung der gewölbten Oberfläche 14 sichtbar ist. Dieses Ausführungsbeispiel hat den Vorteil, daß das Gehäuse dicht ist.FIGS. 5 and 6 show further exemplary embodiments for a switch position indicator. In the example shown in FIG. 5, the push button 43 consists of a transparent plastic. A cover 44 made of an opaque material is embedded in a recess on the inside of the push button and has an opening 47 through which the inscription or marking of the curved surface 14 is visible. This embodiment has the advantage that the housing is sealed.

Aus einem durchsichtigen Kunststoff besteht auch der Druckknopf 45 des Ausführungsbeispiels gemäß Figur 6. Über den eigentlichen Druckknopf 45 ist noch eine Kappe 46 geschoben, die frontseitig eine Aussparung 48 besitzt. Durch diese Aussparung ist die Beschriftung oder Kennzeichnung der gewölbten Oberfläche 14 sichtbar. Auch das Gehäuse des Schalters dieses Ausführungsbeispiets ist somit dicht und gegen Staub und Fremdteile geschützt.The pushbutton 45 of the exemplary embodiment according to FIG. 6 also consists of a transparent plastic. A cap 46 is pushed over the actual pushbutton 45 and has a recess 48 on the front. The inscription or marking of the curved surface 14 is visible through this recess. The housing of the switch of this exemplary embodiment is thus leak-proof and protected against dust and foreign parts.

Bezugszeichenliste 4/84 Pt. + Hgm4/84 Pt. + Hgm

  • 1 Druckknopfschalter1 push button switch
  • 2 Druckknopf2 push buttons
  • 3 Gehäusesockel3 housing bases
  • 4 Schaltstößel4 switching plungers
  • 5 Kontaktbrücke5 contact bridge
  • 6 Mittelkontaktstück6 center contact piece
  • 7 Festkontakt7 fixed contact
  • 8 Schaltwippe8 rocker switch
  • 9 Anlagefläche9 contact surface
  • 10 Rückstellfeder10 return spring
  • 11 Basisteil11 base part
  • 12 Kopfteil12 headboard
  • 13 Schenkel13 legs
  • 14 Oberfläche14 surface
  • 15 Randkante15 edge
  • 16 Spitze16 top
  • 17 Tasche17 bag
  • 18 Steg18 bridge
  • 19 Haltezapfen19 retaining pins
  • 20 Nase20 nose
  • 21 Seitenwand21 side wall
  • 22 Kammer22 chamber
  • 23 Arm23 arm
  • 24 Schneidenlager24 cutting edge bearings
  • 25 Aussparung25 recess
  • 26 Sackloch26 blind hole
  • 27 Erhebung27 survey
  • 28 Ansatz28 approach
  • 29 Schnappzunge29 snap tongue
  • 30 Kontaktzunge30 contact tongue
  • 31 Verbindungssteg31 connecting bridge
  • 32 Schneidenlager32 cutting edge bearings
  • 33 Gleitrippen33 sliding ribs
  • 34 Anlaufschräge34 bevels
  • 35. Führungsleiste35. Guide bar
  • 36 Rastnase36 latch
  • 37 Langloch37 slot
  • 38 Fenster38 windows
  • 39 Anschlußfahne39 connection lug
  • 40 Einschnitt40 incision
  • 41 Seitenwand41 side wall
  • 42 Kontaktelement42 contact element
  • 43 Druckknopf43 push button
  • 44 Abdeckung44 cover
  • 45 Druckknopf45 push button
  • 46 Kappe46 cap
  • 47 Öffnung47 opening
  • 48 Aussparung48 recess

Claims (22)

1. Pushbutton switch (1)
- having a multipart housing, in which a pushbutton (2) is displaceable vis-a-vis a housing base (3),
- having a switch plunger (4) which can be displaced longitudinally by means of the pushbutton (2) through a driver and can be deflected crosswise to this direction,
- having a contact bridge (5) which can be shifted in an abrupt manner about a bearing in a central contact piece (6) between two stops, of which at least one stop is constructed as a fixed contact (7),
- having a switch rocker (8) which determines the position of the contact bridge (5), is arranged such that it is tiltable to-and-fro in the switch housing between two positions and has at least one wedge-shaped contact surface (9) for the switch plunger (4), which surface is coordinated with the switch plunger (4) in both positions of tilt and is in a position which leads, in the case of loading through the switch plunger (4), to a moment for the purposes of tilting into the other position of tilt and a corresponding deflection of the switch plunger (4), and
- having a restoring spring (10) which is supported on the switch plunger (4) and on the switch rocker (8), characterised in that the contact bridge (5) is guided from one counter-bearing, which is formed on the switch rocker (8), in such a way that the contact pressure is generated through the restoring spring (10), that the switch plunger (4) and the switch rocker (8) are arranged and communicate with each other in such a way that the switch plunger (4) in the rest position of the pushbutton (2) always occupies a position of swing deviating from the central position and that the deflection of the switch plunger (4) into these positions of swing is brought about by two forms of constrained guidance, of which the first constrained guidance is effective in the event of movement from the rest position to the switch position and the second constrained guidance is effective in the event of movement from the switch position to the rest position.
2. Pushbutton switch according to claim 1, characterised in that the switch plunger (4) consists of a U-shaped stirrup-like piece with a head portion (12) pre-formed on a base portion (11) and two lateral legs (13) of the same length.
3. Pushbutton switch according to claim 2, characterised in that the head portion (12) has on the front side an arched surface (14) with rounded-off and reinforced lateral edges (15).
4. Pushbutton switch according to claim 2, characterised in that breadth of each of the lateral legs (13) decreases progressively towards the free end in one or more stages and each leg ends in a point (16) which cooperates with the wedge-shaped contact surfaces (9) of the switch plunger (4).
5. Pushbutton switch according to one of the claims 2 to 4, characterised in that recessed on the outside on each leg (13) close to the connection with the base portion (11) there is a V-shaped pocket (17) into which the driver of the pushbutton (2) projects, in which case an imaginary axis projecting through both pocket ends represents the displaceable axis of rotation of the switch plunger (4).
6. Pushbutton switch according to claim 5, characterised in that the driver is constructed as protruding bars (18) which are pre-formed on the inside, extend in the sliding direction and are arranged on opposite sides of the pushbutton (2).
7. Pushbutton switch according to claim 2, characterised in that in the sliding direction a holding peg (19) for the restoring spring (10) is preformed on the side of the base portion (11) opposite the head portion (12).
8. Pushbutton switch according to one of the claims 2 to 6, characterised in that each leg (13) has protruding lugs (20) which are pre-formed on both sides in cross deflection.
9. Pushbutton switch according to one of the claims 1 to 8, characterised in that the switch rocker (8) is constructed like a two-armed lever with a short and a long arm, the short arm being formed by two resilient side walls (21), which jut out beyond the breadth of the long arm and lie opposite each other with spacing, in such a way that a chamber (22), which is open on several sides, develops to receive the base portion (11) of the switch plunger (4).
10. Pushbutton switch according to claim 9, characterised in that the long arm (23) of the switch rocker (8) towards the free end has a tapering cross section.
11. Pushbutton switch according to one of the claims 9 or 10, characterised in that the end of the long arm (23) is provided with at least one knife-edge bearing (24) which forms the counter-bearing for the contact bridge (5) and the outline of which, extending in the sliding direction, is formed by the wedge-shaped contact surfaces (9).
12. Pushbutton switch according to claim 11, characterised in that a recess (25) is provided between two knife-edge bearings (24), lying on the outside, in the long arm (23).
13. Pushbutton switch according to claim 9, characterised in that the long arm (23) in the sliding direction of the pushbutton (2) has a blind hole (26) for receiving in part the restoring spring (10).
14. Pushbutton switch according to claim 13, characterised in that the restoring spring (10) is a helical spring.
15. Pushbutton switch according to claim 9, characterised in that the side walls (21) have on their outside surfaces convex elevations (27).
16. Pushbutton switch according to claim 9, characterised in that the side walls (21) are developed at the free end with several projections (28) which are directed inwards, towards each other, and which cooperate with the lugs (20) of the switch plunger (4) for the purposes of a forced swing of the switch plunger (4).
17. Pushbutton switch according to claim 1, characterised in that the contact bridge (5) is constructed in an E-shaped manner and in one piece, with two parallel outer snap tongues (29) supplying the snap moment and a longer contact tongue (30) arranged in between, in which case snap tongues (20) (sic) and contact tongue (30) are connected with each other by means of a connecting bar (31) arranged crosswise to them.
18. Pushbutton switch according to claim 17, characterised in that the contact bridge (5) is mounted with its connecting bar (31) in the knife-edge bearing (32) of the central contact piece (6) and with the snap tongues (29) in the knife-edge bearings (24) of the switch rocker (8).
19. Pushbutton switch according to claim 1, characterised in that formed on two opposite inside walls of the housing base (3), in each case, there is at least one slide rib (33) with an abutting slope (34) which extends in the longitudinal direction and on which the lateral edges (15) of the head portion (12) of the switch plunger (4) ride in order to effect a swing of the switch plunger (4).
20. Pushbutton switch according to claim 1, characterised in that the outer walls of the housing base (3) have pre-formed guide strips (35) for the guidance of the pushbutton (2).
21. Pushbutton switch according to claim 1, characterised in that the housing base (3) has protruding catch lugs (36) which project into long holes (37) of the pushbutton (2) and cooperate with them for the purposes of a snap-holding action with stop.
22. Pushbutton switch according to claim 1, characterised in that a window (38) on the front side is recessed in the pushbutton (2) for the purposes of indicating the switch position according to the position of swing of the switch plunger (4).
EP85101787A 1984-03-31 1985-02-19 Push button switch Expired EP0160791B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3412027A DE3412027A1 (en) 1984-03-31 1984-03-31 PUSH BUTTON SWITCH
DE3412027 1984-03-31

Publications (2)

Publication Number Publication Date
EP0160791A1 EP0160791A1 (en) 1985-11-13
EP0160791B1 true EP0160791B1 (en) 1988-02-10

Family

ID=6232209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85101787A Expired EP0160791B1 (en) 1984-03-31 1985-02-19 Push button switch

Country Status (4)

Country Link
US (1) US4757164A (en)
EP (1) EP0160791B1 (en)
JP (1) JPS60241615A (en)
DE (1) DE3412027A1 (en)

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CN106098423A (en) * 2016-08-05 2016-11-09 新乡市光明电器有限公司 Big electric current urgent power-off switch

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DE19809350C2 (en) * 1998-03-05 2003-11-27 Berker Gmbh & Co Kg Electric push button switch
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Also Published As

Publication number Publication date
DE3412027C2 (en) 1988-07-14
US4757164A (en) 1988-07-12
JPS60241615A (en) 1985-11-30
DE3412027A1 (en) 1985-10-10
EP0160791A1 (en) 1985-11-13

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