EP0392973A1 - Push button on printed circuit board - Google Patents

Push button on printed circuit board Download PDF

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Publication number
EP0392973A1
EP0392973A1 EP90810173A EP90810173A EP0392973A1 EP 0392973 A1 EP0392973 A1 EP 0392973A1 EP 90810173 A EP90810173 A EP 90810173A EP 90810173 A EP90810173 A EP 90810173A EP 0392973 A1 EP0392973 A1 EP 0392973A1
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EP
European Patent Office
Prior art keywords
circuit board
contact
printed circuit
snap disk
tabs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90810173A
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German (de)
French (fr)
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EP0392973B1 (en
Inventor
Peter Rothlin
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.)
Sulzer AG
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Sulzer AG
Gebrueder Sulzer AG
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Publication of EP0392973A1 publication Critical patent/EP0392973A1/en
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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
    • H01H13/02—Details
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/48—Snap-action arrangements depending upon deformation of elastic members using buckling of disc springs
    • 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
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/7006—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard comprising a separate movable contact element for each switch site, all other elements being integrated in layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2205/00—Movable contacts
    • H01H2205/016—Separate bridge contact
    • H01H2205/024—Means to facilitate positioning
    • H01H2205/03—Apertured plate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2215/00—Tactile feedback
    • H01H2215/034—Separate snap action
    • H01H2215/036—Metallic disc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2225/00—Switch site location
    • H01H2225/012—Switch site location normally closed

Definitions

  • the invention relates to a push button on printed circuit boards with an electrically conductive snap disk which is embedded in a recess in a spacer layer between a cover film and the printed circuit board coated with conductor tracks.
  • Pushbuttons with snap disks are described as a membrane keyboard with a pressure point in DE-A 31 45 434. These are make contacts that short-circuit an electrical circuit when operated mechanically.
  • the FR-PS 80 01600 shows various forms of foil pushbuttons, in which the partly moved conductor tracks are applied to deformable foils, and conveys the principle of an opener in the form of a spiral spring clamped in through a foil coated with a conductor track their support is lifted off on this conductor track.
  • Breaker buttons have the task of interrupting circuits with a direct effect for safety reasons. They have to be characterized by a long service life and operational safety and must not cause incorrect switching due to shocks and vibrations. They are almost always used right next to closing pushbuttons. Although pushbuttons have been used as closers for several years Membrane keyboards are used, there are hardly any equivalent designs for Openers. The object of the invention is therefore to provide a pushbutton that is equivalent or better to be closed for membrane keyboards.
  • the object is achieved in that the snap washer has offset contact tabs and pull tabs, in that the draw tabs are anchored to the snap disk on the circuit board under tension and in that the contact tabs form an elastic yoke, in the unactuated state they rest only on the conductor tracks and in each case between of the contact surface and the snap disk plate have a support knee curved towards the circuit board, which is supported on the printed circuit board when the snap disk is pressed down and increases the mechanical resistance, the area between the support knee and the disk plate springing elastically, the knee originally biased towards contact sliding on the circuit board Swiveling movement takes place and the end of the contact tab with its contact surface lifts off the conductor track.
  • a pushbutton is shown on a printed circuit board 1 with an electrically conductive snap disk 4, which is embedded in a recess in a spacer layer 2 between a cover film 3 and the printed circuit board 1 coated with conductor tracks 7.
  • the snap disk 4 has mutually offset contact tabs 5 and pull tabs 6, the draw tabs are anchored to the snap disk 4 on the printed circuit board 1 under tension and the contact tabs form an elastic yoke.
  • the contact tabs 5 are pretensioned on the conductor tracks 7 and, between the contact surface 8 and the disk plate 10, have a support knee 9 curved toward the printed circuit board 1.
  • the necessary actuating force When the snap disk 4 is pressed down in the actuating direction d, the necessary actuating force initially grows in an area 1 Fa and the contact force Fc until the support knee 9 is supported on the circuit board 1. Due to the shortened leverage between the support knee 9 and the disk plate 10, the necessary actuating force rises more steeply in an area II, the area between the support knee 9 and the disk plate 10 elastically deflecting, the knees originally preloaded from the contact surface 8 slidingly executing on the circuit board and the contact force Fc decreases until the contact surface 8 lifts off the conductor track 7.
  • the resilient elements are dimensioned and matched to the height of the conductor track 7 in the area of the contact area 8 such that the contact areas 8 at the latest lift off when the peak value for the actuating force Fa is reached.
  • the actuating force Fa initially decreases with progressive deformation in the actuating direction d until the snap disk plate is also seated on the printed circuit board and opposes substantially greater resistance, which protects the other snap disk areas from excessive stress.
  • the contact force Fa in the unactuated state depends on the pretensioning of the pull tabs 6, which center the snap disk on the one hand and on the other hand are guided in a preferred embodiment through recesses 11 in the printed circuit board 1 and are latched with protruding bends on the back of the printed circuit board 1. Other mounting options respectively. Abutments result from encapsulation, gluing or pressing on the pull tabs.
  • the play between the snap disk 4 and the cover sheet 3 is once in the case of negative play, i.e. Overlap, used to increase the contact force Fc in the unactuated state and, on the other hand, serves to center the actuating finger when there is positive play.
  • a preferred application for the breaker buttons described is in gas refueling devices for motor vehicles.

Landscapes

  • Push-Button Switches (AREA)

Abstract

Eine Drucktaste an Leiterplatten (1) mit einer elektrisch leitenden Schnappscheibe (4), die in einer Aussparung einer Distanzschicht 2 zwischen einer Abdeckfolie (3) und der mit Leiterbahnen (7) beschichteten Leiterplatte (1) eingebettet ist, wird als unterbrechertaste mit Druck­punkt ausgeführt, indem die Schnappscheibe zueinander versetzte Kontaktlappen (5) und Zuglappen (6) aufweist, die Zuglappen (6) unter Vorspannung an der Leiterplatte (1) verankert sind, um den nötigen Kontaktdruck bei Nichtbetätigung zu erzeugen, und die Kontaktlappen (5) zwischen der Kontaktfläche (8) und dem Schnappscheiben­teller (10) ein zur Leiterplatte (1) gekrümmtes Abstütz­knie (9) aufweisen, das sich bei Betätigung der Schnapp­scheibe (4) auf der Leiterplatte (1) abstützt und mit zunehmender Betätigungskraft (Fa), die Kontaktfkraft (Fc) bis zum Abheben der Kontaktfläche (8) verringert. Abheben der Kontaktfläche (8) und das Durchlaufen des Druck­punktes resp. des Scheitelwertes für die Betätigungskraft (Fa) treten bei dem gleichen Deformationsweg (d) der Schnappscheibe auf.

Figure imgaf001
A push button on printed circuit boards (1) with an electrically conductive snap disk (4), which is embedded in a recess in a spacer layer 2 between a cover film (3) and the printed circuit board (1) coated with conductor tracks (7), is designed as an interrupter button with a pressure point , by the snap disc offset contact tabs (5) and pull tabs (6), the pull tabs (6) are anchored to the circuit board (1) under prestress to generate the necessary contact pressure when not actuated, and the contact tabs (5) between the Contact surface (8) and the snap disk plate (10) have a support knee (9) curved towards the printed circuit board (1), which is supported on the printed circuit board (1) when the snap disk (4) is actuated, and the contact force () with increasing actuating force (Fa). Fc) reduced until the contact surface (8) is lifted off. Lifting off the contact surface (8) and going through the pressure point respectively. of the peak value for the actuating force (Fa) occur with the same deformation path (d) of the snap disk.
Figure imgaf001

Description

Die Erfindung bezieht sich auf eine Drucktaste an Leiter­platten mit einer elektrisch leitenden Schnappscheibe, die in einer Aussparung einer Distanzschicht zwischen einer Abdeckfolie und der mit Leiterbahnen beschichteten Leiterplatte eingebettet ist.The invention relates to a push button on printed circuit boards with an electrically conductive snap disk which is embedded in a recess in a spacer layer between a cover film and the printed circuit board coated with conductor tracks.

Drucktasten mit Schnappscheiben sind als Folientastatur mit Druckpunkt in der DE-A 31 45 434 beschrieben. Es handelt sich um Schliesser, die bei mechanischer Betäti­gung einen elektischen Stromkreis kurzschliessen. Im wei­teren zeigt die FR-PS 80 01600 verschiedende Formen von Foliendrucktasten, bei denen die zum Teil bewegten Lei­terbahnen auf deformierbaren Folien aufgebracht sind, und vermittelt das Prinzip eines Oeffners in Form einer ein­seitig eingespannten Biegefeder, die durch eine mit einer Leiterbahn beschichtete Folie hindurch von ihrer Auflage auf dieser Leiterbahn abgehoben wird.Pushbuttons with snap disks are described as a membrane keyboard with a pressure point in DE-A 31 45 434. These are make contacts that short-circuit an electrical circuit when operated mechanically. Furthermore, the FR-PS 80 01600 shows various forms of foil pushbuttons, in which the partly moved conductor tracks are applied to deformable foils, and conveys the principle of an opener in the form of a spiral spring clamped in through a foil coated with a conductor track their support is lifted off on this conductor track.

Unterbrechertasten haben die Aufgabe, aus Sicherheits­gründen Stromkreise direkt wirkend zu unterbrechen. Sie müssen sich durch hohe Lebensdauer und Betriebssicherheit auszeichnen und dürfen keine Fehlschaltungen wegen Stössen und Vibrationen hervorrufen. Sie sind fast immer direkt neben schliessenden Drucktasten eingesetzt. Obwohl Drucktasten als Schliesser seit einigen Jahren bei Folientastaturen angewendet werden, gibt es kaum gleich­wertige Ausführungen für Oeffner. Die Erfindung hat daher die Aufgabe, einen zu schliessenden Drucktasten gleich­wertigen oder besseren Oeffner für Folientastaturen zu schaffen.Breaker buttons have the task of interrupting circuits with a direct effect for safety reasons. They have to be characterized by a long service life and operational safety and must not cause incorrect switching due to shocks and vibrations. They are almost always used right next to closing pushbuttons. Although pushbuttons have been used as closers for several years Membrane keyboards are used, there are hardly any equivalent designs for Openers. The object of the invention is therefore to provide a pushbutton that is equivalent or better to be closed for membrane keyboards.

Gemäss der Erfindung wird die Aufgabe gelöst, indem die Schnappscheibe zueinander versetzte Kontaktlappen und Zuglappen aufweist, indem die Zuglappen unter Zugspannung zur Schnappscheibe an der Leiterplatte verankert sind und indem die Kontaktlappen ein elastisches Joch bilden, im unbetätigten Zustand nur auf den Leiterbahnen aufliegen und jeweils zwischen der Kontaktfläche und dem Schnapp­scheibenteller ein zur Leiterplatte gekrümmtes Abstütz­knie aufweisen, das sich beim Hinunterpressen der Schnappscheibe auf der Leiterplatte abstützt und die mechanische Widerstandskraft vergrössert, wobei der Bereich zwischen Abstützknie und Scheibenteller elastisch einfedert, das ursprünglich zum Kontakt hin vorgespannte Knie auf der Leiterplatte gleitend eine Schwenkbewegung vollzieht und das Ende des Kontaktlappens mit seiner Kontaktfläche von der Leiterbahn abhebt.According to the invention, the object is achieved in that the snap washer has offset contact tabs and pull tabs, in that the draw tabs are anchored to the snap disk on the circuit board under tension and in that the contact tabs form an elastic yoke, in the unactuated state they rest only on the conductor tracks and in each case between of the contact surface and the snap disk plate have a support knee curved towards the circuit board, which is supported on the printed circuit board when the snap disk is pressed down and increases the mechanical resistance, the area between the support knee and the disk plate springing elastically, the knee originally biased towards contact sliding on the circuit board Swiveling movement takes place and the end of the contact tab with its contact surface lifts off the conductor track.

Weitere Vorteile der Erfindung sind darin zu sehen, dass nur durch die unerschiedliche Anordnung der Leiterbahnen und durch die unterschiedlich gestalteten Schnappscheiben die Fertigung von Oeffnern und Schliessern an einer Leiterplatte im Verbund ermöglicht ist und dass dem Benutzer die gleiche taktile Rückmeldung für die Aus­führung der Funktion durch Ueberschreiten eines Druck­punktes vermittelt wird.Further advantages of the invention can be seen in the fact that only the different arrangement of the conductor tracks and the differently designed snap disks make it possible to manufacture openers and closers on a printed circuit board in a network and that the user receives the same tactile feedback for the execution of the function Exceeding a pressure point is conveyed.

Im folgenden wird die Erfindung anhand von einem Ausfüh­rungsbeispiel beschrieben. Es zeigen:

  • Fig. 1 einen perspektivischen Ausschnitt aus einer Leiterplatte mit einer als Oeffner ausge­bildeten Drucktaste und
  • Fig. 2 eine graphische Darstellung für die Ab­hängigkeit der Betätigungskraft und des Kontaktdruckes einer Oeffnerdrucktaste vom Deformationsweg der Schnappscheibe.
The invention is described below using an exemplary embodiment. Show it:
  • Fig. 1 shows a perspective section of a Printed circuit board with a push button designed as an opener and
  • Fig. 2 is a graphical representation of the dependence of the actuation force and the contact pressure of an open push button on the deformation path of the snap disk.

In den Figuren ist eine Drucktaste an einer Leiterplatte 1 mit einer elektrisch leitenden Schnappscheibe 4, die in einer Aussparung einer Distanzschicht 2 zwischen einer Abdeckfolie 3 und der mit Leiterbahnen 7 beschichteten Leiterplatte 1 eingebettet ist, gezeigt. Erfindungsgemäss weist die Schnappscheibe 4 zueinander versetzte Kontakt­lappen 5 und Zuglappen 6 auf, sind die Zuglappen unter Zugspannung zur Schnappscheibe 4 an der Leiterplatte 1 verankert und bilden die Kontaktlappen ein elastisches Joch. Die Kontaktlappen 5 liegen im unbetätigten Zustand unter Vorspannung auf den Leiterbahnen 7 auf und besitzen zwischen der Kontaktfläche 8 und dem Scheibenteller 10 ein zur Leiterplatte 1 gekrümmtes Abstützknie 9. Beim Hinunterpressen der Schnappscheibe 4 in der Betätigungs­richtung d wächst zunächst in einem Bereich 1 die notwen­dige Betätigungskraft Fa und die Kontaktkraft Fc, bis das Abstützknie 9 sich auf der Leiterplatte 1 abstützt. Durch die verkürzte Hebelwirkung zwischen Abstützknie 9 und Scheibenteller 10 steigt die notwendige Betätigungskraft in einem Bereich II steiler an, wobei der Bereich zwi­schen Abstützknie 9 und Scheibenteller 10 elastisch einfedert, das ursprünglich von der Kontaktfläche 8 her vorgespannte Knie auf der Leiterplatte gleitend eine Schwenkbewegung vollzieht und sich die Kontaktkraft Fc bis zum Abheben der Kontaktfläche 8 von der Leiterbahn 7 verringert. Die federnden Elemente sind so dimensioniert und mit der Höhe der Leiterbahn 7 im Bereich der Kontakt­fläche 8 abgestimmt, dass die Kontaktflächen 8 spätestens mit dem Erreichen des Scheitelwertes für die Betätigungs­kraft Fa abheben.In the figures, a pushbutton is shown on a printed circuit board 1 with an electrically conductive snap disk 4, which is embedded in a recess in a spacer layer 2 between a cover film 3 and the printed circuit board 1 coated with conductor tracks 7. According to the invention, the snap disk 4 has mutually offset contact tabs 5 and pull tabs 6, the draw tabs are anchored to the snap disk 4 on the printed circuit board 1 under tension and the contact tabs form an elastic yoke. In the unactuated state, the contact tabs 5 are pretensioned on the conductor tracks 7 and, between the contact surface 8 and the disk plate 10, have a support knee 9 curved toward the printed circuit board 1. When the snap disk 4 is pressed down in the actuating direction d, the necessary actuating force initially grows in an area 1 Fa and the contact force Fc until the support knee 9 is supported on the circuit board 1. Due to the shortened leverage between the support knee 9 and the disk plate 10, the necessary actuating force rises more steeply in an area II, the area between the support knee 9 and the disk plate 10 elastically deflecting, the knees originally preloaded from the contact surface 8 slidingly executing on the circuit board and the contact force Fc decreases until the contact surface 8 lifts off the conductor track 7. The resilient elements are dimensioned and matched to the height of the conductor track 7 in the area of the contact area 8 such that the contact areas 8 at the latest lift off when the peak value for the actuating force Fa is reached.

Im Bereich III sinkt die Betätigungskraft Fa zunächst mit fortschreitender Deformation in Betätigungsrichtung d bis auch der Schnappscheibenteller auf der Leiterplatte auf­sitzt und wesentlich grösseren Widerstand entgegensetzt, der die übrigen Schnappscheibenbereiche vor Ueber­beanspruchung schützt. Die Kontaktkraft Fa im unbe­tätigten Zustand hängt von der Vorspannung der Zuglappen 6 ab, die einerseits die Schnappscheibe zentrieren und andererseits in einer bevorzugten Ausführung durch Ausnehmungen 11 in der Leiterplatte 1 geführt und mit vorstehenden Abbiegungen auf der Rückseite der Leiter­platte 1 verklinkt sind. Weitere Befestigungsmöglich­keiten resp. Widerlager ergeben sich durch Umgiessen, Ankleben oder Anpressen der Zuglappen. Das Spiel zwischen Schnappscheibe 4 und Abdeckfolie 3 wird einmal bei nega­tivem Spiel, d.h. Ueberlappung, zur Erhöhung der Kontakt­kraft Fc im unbetätigten Zustand verwendet und dient zum anderen bei positivem Spiel der Zentrierung des Betäti­gungsfingers. Eine bevorzugte Anwendung für die beschrie­benen Unterbrechertasten besteht in Gasbetankungsgeräten für Kraftfahrzeuge.In area III, the actuating force Fa initially decreases with progressive deformation in the actuating direction d until the snap disk plate is also seated on the printed circuit board and opposes substantially greater resistance, which protects the other snap disk areas from excessive stress. The contact force Fa in the unactuated state depends on the pretensioning of the pull tabs 6, which center the snap disk on the one hand and on the other hand are guided in a preferred embodiment through recesses 11 in the printed circuit board 1 and are latched with protruding bends on the back of the printed circuit board 1. Other mounting options respectively. Abutments result from encapsulation, gluing or pressing on the pull tabs. The play between the snap disk 4 and the cover sheet 3 is once in the case of negative play, i.e. Overlap, used to increase the contact force Fc in the unactuated state and, on the other hand, serves to center the actuating finger when there is positive play. A preferred application for the breaker buttons described is in gas refueling devices for motor vehicles.

Claims (11)

1. Drucktaste an Leiterplatten (1) mit einer elektrisch leitenden Schnappscheibe (4), die in einer Aussparung einer Distanzschicht (2) zwischen einer Abdeckfolie (3) und der mit Leiterbahnen (7) beschichteten Leiterplatte (1) eingebettet ist, dadurch gekennzeichnet, dass die Schnappscheibe (4) zueinander versetzte Kontaktlappen (5) und Zuglappen (6) aufweist, dass die Zuglappen (6) unter Zugspannung zur Schnappscheibe (4) an der Leiterplatte (1) verankert sind, und dass die Kontaktlappen ein ela­stisches Joch bilden, im unbetätigten Zustand nur auf den Leiterbahnen (7) aufliegen und jeweils zwischen der Kon­taktfläche (8) und dem Schnappscheibenteller (10) ein zur Leiterplatte (1) gekrümmtes Abstützknie (9) aufweisen, das sich beim Hinunterpressen der Schnappscheibe (4) auf der Leiterplatte (1) abstützt und die mechanische Wider­standskraft vergrössert, wobei der Bereich zwischen Ab­stützknie (9) und Scheibenteller (10) elastisch ein­federt, das ursprünglich zum Kontakt hin vorgespannte Knie auf der Leiterplatte gleitend eine Schwenkbewegung vollzieht und das Ende des Kontaktlappens (5) mit seiner Kontaktfläche (8) von der Leiterbahn (7) abhebt.1. Pushbutton on printed circuit boards (1) with an electrically conductive snap disk (4) which is embedded in a recess in a spacer layer (2) between a cover film (3) and the printed circuit board (1) coated with conductor tracks (7), characterized in that that the snap disc (4) has mutually offset contact tabs (5) and pull tabs (6), that the pull tabs (6) are anchored to the snap disk (4) on the printed circuit board (1) under tension, and that the contact tabs form an elastic yoke, in the unactuated state only rest on the conductor tracks (7) and each have a support knee (9) curved between the contact surface (8) and the snap disk plate (10), which is pressed onto the printed circuit board when the snap disk (4) is pressed down (1) supports and increases the mechanical resistance, whereby the area between the support knee (9) and the disc plate (10) resiliently deflects that originally for contact hi n preloaded knees slidingly executes a pivoting movement and the end of the contact tab (5) with its contact surface (8) lifts off the conductor track (7). 2. Drucktaste nach Anspruch 1, dadurch gekennzeichnet, dass die Zuglappen (6) die Schnappscheibe auf der Leiter­platte positionieren.2. Push button according to claim 1, characterized in that the pull tabs (6) position the snap disk on the circuit board. 3. Drucktaste nach Anspruch 1 und 2, dadurch gekenn­zeichnet, dass ein Widerlager für die Zuglappen (6) gebildet ist, indem die Zuglappen (6) durch eine Aus­nehmung (11) in der Leiterplatte (1) geführt sind und sich durch vorstehende Abbiegungen (12) auf der Rückseite der Leiterplatte verklinken.3. Push button according to claim 1 and 2, characterized in that an abutment for the pull tabs (6) is formed by the pull tabs (6) are guided through a recess (11) in the printed circuit board (1) and by protruding bends ( 12) latch on the back of the circuit board. 4. Drucktaste nach Anspruch 1 und 2, dadurch gekenn­zeichnet, dass Widerlager an der Leiterplatte (1) für Zuglappen (6) durch Umgiessen, Kleben oder Anpressen ge­bildet sind.4. Push button according to claim 1 and 2, characterized in that abutments on the circuit board (1) for pull tabs (6) are formed by casting, gluing or pressing. 5. Drucktaste nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass beim Angreifen der Betätigungskraft (Fa) im Bereich des Schnappscheibentellers (10) mindestens ein Kontaktlappen (5) mit seiner Kontaktfläche (8) von der Leiterbahn (6) abhebt.5. Push button according to one of claims 1 to 4, characterized in that when the actuating force (Fa) is applied in the region of the snap disk plate (10), at least one contact tab (5) with its contact surface (8) lifts off the conductor track (6). 6. Drucktaste nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Betätigungskraft (Fa) nach dem Ueberschreiten eines Scheitelwertes spürbar abfällt bis der Schnappscheibenteller (10) auf der Leiterplatte (1) aufliegt und mit seiner wesentlich grösseren Steifigkeit Kontaktlappen (5) und Zuglappen (6) vor unzulässigen Deformationen schützt.6. Pushbutton according to one of claims 1 to 5, characterized in that the actuating force (Fa) drops noticeably after a peak value has been exceeded until the snap disk plate (10) rests on the printed circuit board (1) and with its substantially greater stiffness contact tabs (5) and pull tabs (6) protects against impermissible deformations. 7. Drucktaste nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass spätestens mit dem Erreichen des Scheitelwertes für die Betätigungskraft (Fa) die Kontakt­kraft (Fc) auf Null zurückgeht und die Kontaktlappen (5) mit ihrer Kontaktfläche (8) von den Leiterbahnen (7) abheben.7. Pushbutton according to one of claims 1 to 6, characterized in that at the latest when the peak value for the actuating force (Fa) is reached, the contact force (Fc) returns to zero and the contact tabs (5) with their contact surface (8) from the conductor tracks (7) lift off. 8. Drucktaste nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Abheben der Kontaktflächen (8) von den Leiterbahnen (7) vor dem Erreichen des Scheitel­wertes durch Verändern der Höhe der Leiterbahn (7) gegenüber der Leiterplatte (1) im Bereich der Kontakt­fläche (8) einstellbar ist.8. Push button according to one of claims 1 to 7, characterized in that the lifting of the contact surfaces (8) from the conductor tracks (7) before reaching the peak value by changing the height of the conductor track (7) relative to the circuit board (1) in the area the contact surface (8) is adjustable. 9. Drucktaste nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Abdeckfolie (3) durch eine vor­stehende Schnappscheibe (4) in nicht betätigtem Zustand vorgespannt ist und zur Bildung der Kontaktkraft (Fc) beiträgt.9. Push button according to one of claims 1 to 8, characterized in that the cover film (3) by a protruding snap disc (4) in the non-actuated state is biased and contributes to the formation of the contact force (Fc). 10. Drucktaste nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass Elastizität und Abstand der Abdeck­folie (3) so mit der Höhe und dem Durchmesser der Schapp­scheibe abgestimmt sind, dass ein menschlicher Betäti­gungsfinger zwangsweise zum Schnappscheibenteller hin abrollt.10. Push button according to one of claims 1 to 8, characterized in that the elasticity and distance of the cover film (3) are so matched to the height and diameter of the snap disk that a human actuating finger forcibly rolls towards the snap disk plate. 11. Gasbetankungsgerät zum Betanken von Kraftfahrzeugen, dadurch gekennzeichnet, dass zur manuellen Unterbrechung von Stromkreisen Unterbrechertasten entsprechend den An­sprüchen 1 bis 10 verwendet werden.11. Gas refueling device for refueling motor vehicles, characterized in that interrupter buttons according to claims 1 to 10 are used for the manual interruption of circuits.
EP90810173A 1989-04-10 1990-03-07 Push button on printed circuit board Expired - Lifetime EP0392973B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1344/89A CH677552A5 (en) 1989-04-10 1989-04-10
CH1344/89 1989-04-10

Publications (2)

Publication Number Publication Date
EP0392973A1 true EP0392973A1 (en) 1990-10-17
EP0392973B1 EP0392973B1 (en) 1994-02-23

Family

ID=4208285

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810173A Expired - Lifetime EP0392973B1 (en) 1989-04-10 1990-03-07 Push button on printed circuit board

Country Status (7)

Country Link
US (1) US4978818A (en)
EP (1) EP0392973B1 (en)
AU (1) AU631858B2 (en)
CA (1) CA2014135A1 (en)
CH (1) CH677552A5 (en)
DE (1) DE59004650D1 (en)
NZ (1) NZ232888A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0809266A2 (en) * 1996-05-25 1997-11-26 ABBPATENT GmbH Low tension switch device
EP0951032A2 (en) * 1998-04-17 1999-10-20 INOVAN GmbH & Co. KG Metalle und Bauelemente Snap disc switch having improved contact distance
WO1999054900A1 (en) * 1998-04-18 1999-10-28 Inovan Gmbh & Co. Kg Metalle Und Bauelemente Snap-on wafer switch with a fixing element
FR2841037A1 (en) * 2002-06-13 2003-12-19 Itt Mfg Enterprises Inc Push button switch normally closed having contact carriers isolating material held and conductor strip forming contact/button activated with carriers released when button pushed.
WO2010049219A1 (en) * 2008-10-28 2010-05-06 Thales Keypad with long key travel and improved touch feeling

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FR2755534B1 (en) * 1996-11-06 1998-12-11 Apem ELECTRIC PUSH BUTTON FORMING ELEMENT
US5898147A (en) * 1997-10-29 1999-04-27 C & K Components, Inc. Dual tact switch assembly
US6423918B1 (en) * 2000-03-21 2002-07-23 Lear Corporation Dome switch
SG100707A1 (en) * 2000-06-07 2003-12-26 Ebauchesfabrik Eta Ag Control device with a snap function and watch fitted therewith
TW572345U (en) * 2003-06-23 2004-01-11 Emi Stop Corp Elastic sheet of ingle-piece circuit switch
DE102005041029B4 (en) * 2005-08-23 2007-09-06 Prettl, Rolf Belt buckle for seat belts
US7700890B2 (en) * 2008-01-15 2010-04-20 Research In Motion Limited Key dome assembly with improved tactile feedback
DE102008063732A1 (en) * 2008-12-18 2010-06-24 Siemens Aktiengesellschaft Membrane button for use in paging system, has contact surface contacted during actuation of contact disk with conductive strip, where strip is electrically connected with electric circuit for connection with measuring device
KR20170022567A (en) * 2015-08-21 2017-03-02 삼성전자주식회사 Contact Structure and Contact device, and electronic Device including the same
JP6689284B2 (en) * 2015-09-30 2020-04-28 アルプスアルパイン株式会社 Push switch

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DE3145434A1 (en) * 1981-11-16 1983-05-26 Kundisch GmbH, 7730 Villingen-Schwenningen Film keyboard with a pressure point
DE3226008A1 (en) * 1982-07-12 1984-01-12 Siemens AG, 1000 Berlin und 8000 München Switching device for contacts on a support

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0809266A2 (en) * 1996-05-25 1997-11-26 ABBPATENT GmbH Low tension switch device
EP0809266A3 (en) * 1996-05-25 1998-11-04 ABBPATENT GmbH Low tension switch device
EP0951032A2 (en) * 1998-04-17 1999-10-20 INOVAN GmbH & Co. KG Metalle und Bauelemente Snap disc switch having improved contact distance
EP0951032A3 (en) * 1998-04-17 2000-10-04 INOVAN GmbH & Co. KG Metalle und Bauelemente Snap disc switch having improved contact distance
WO1999054900A1 (en) * 1998-04-18 1999-10-28 Inovan Gmbh & Co. Kg Metalle Und Bauelemente Snap-on wafer switch with a fixing element
DE19823894C1 (en) * 1998-04-18 2000-01-05 Inovan Stroebe Snap disc switch with fastener
FR2841037A1 (en) * 2002-06-13 2003-12-19 Itt Mfg Enterprises Inc Push button switch normally closed having contact carriers isolating material held and conductor strip forming contact/button activated with carriers released when button pushed.
WO2010049219A1 (en) * 2008-10-28 2010-05-06 Thales Keypad with long key travel and improved touch feeling
US8541707B2 (en) 2008-10-28 2013-09-24 Thales Keypad with long key travel and improved touch feeling

Also Published As

Publication number Publication date
CA2014135A1 (en) 1990-10-10
NZ232888A (en) 1993-04-28
US4978818A (en) 1990-12-18
AU5299390A (en) 1990-10-11
AU631858B2 (en) 1992-12-10
DE59004650D1 (en) 1994-03-31
CH677552A5 (en) 1991-05-31
EP0392973B1 (en) 1994-02-23

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