DE3006591A1 - Key pad with foam maintained contact gap - has underside contact on top pressure layer separated from base contact by collapsible foam sides - Google Patents

Key pad with foam maintained contact gap - has underside contact on top pressure layer separated from base contact by collapsible foam sides

Info

Publication number
DE3006591A1
DE3006591A1 DE19803006591 DE3006591A DE3006591A1 DE 3006591 A1 DE3006591 A1 DE 3006591A1 DE 19803006591 DE19803006591 DE 19803006591 DE 3006591 A DE3006591 A DE 3006591A DE 3006591 A1 DE3006591 A1 DE 3006591A1
Authority
DE
Germany
Prior art keywords
contact
foam
underside
film
base
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.)
Ceased
Application number
DE19803006591
Other languages
German (de)
Inventor
Heinz 8554 Sollenberg Burgeth
Otto 8554 Gräfenberg Schill
Günter 8551 Eglofffstein Tessendorf
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.)
Telefunken Electronic GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE19803006591 priority Critical patent/DE3006591A1/en
Publication of DE3006591A1 publication Critical patent/DE3006591A1/en
Ceased legal-status Critical Current

Links

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
    • H01H13/70—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
    • H01H13/702—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 with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • 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
    • H01H13/702—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 with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/703—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 with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by spacers between contact carrying layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/002—Materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/046—Properties of the spacer
    • H01H2209/052—Properties of the spacer elastomeric

Abstract

Keypad press switches use a top cover elasticised material, (PETP), metallised on the underside and with foam spacers between each switch contact area. The press buttons(D) are marked and spaced along the top cover (1) which is overall coated on the underside with the metal contact material (2). The base (4) is a rigid material with various switch contacts (5) on its upper side. The top (1) and base (4) are spaced apart by a foam material (3) which can partially collapse when an individual button is pressed. Switch contact is made across an insulating gap (6) maintained by the foam material (3) so that the underside contact (2) of the top makes with the base contact (5). The foam material (3) has cutout sections to align with the press button positions (D), and is an insulator material.

Description

Beschreibungdescription

Tastschalter Die vorliegende Erfindung betrifft einen Tastschalter mit einer elastischen Druckfolie aus Isoliermaterial, die zumindest in den Druckbereichen auf ihrer Unterseite t Flächenelektroden versehen ist, mit wenigstens einem folienartigen Abstandsteil aus Isoliermaterial, das in den Schaltbereichen mit entsprechend geformten Du-chbrüchen versehen ist und einer Bodenplatte oder Bednfolie, die auf ihrer Oberseite in den Druckbereichen tlit wenigstens einer Flächenelektrode versehen ist, so daß bei Ausüben eines Druckes auf die Drucl.folie, deren Flächenelektrode die gegenüberliegende Flächenelektrode der Bodenplatte elektrisch kontaktiert.Key switch The present invention relates to a key switch with an elastic pressure film made of insulating material, at least in the pressure areas is provided on its underside t surface electrodes, with at least one film-like Spacer made of insulating material, which is shaped accordingly in the switching areas Breakthroughs are provided and a base plate or sheet on the top is provided in the pressure areas tlit at least one surface electrode, so that when pressure is exerted on the printing film, its surface electrode is the opposite Electrically contacted surface electrode of the base plate.

Tastschalter der vorstehend genannten Art sind bereits bekannt. Bei diesen bekannten Tastschaltern besteht die Abstandsfolie aus einem festen oder elastischen Material; das jedoch nicht zusammendrückbar ist. BeiL Betätigen dc Druckfolie wird diese in die Öffnung der Abstandsfolie hinein elastisch deformiert, wobei stärkere Biegsbennspruchungen der Druckfolie dert auftretan, wo sich diese über den Rand der Öffnung der Abstandsfolie biet.Push-button switches of the type mentioned above are already known. at these known pushbutton switches, the spacer film consists of a solid or elastic Material; but that is not compressible. Press on L dc printing film, this is elastically deformed into the opening of the spacer film, stronger bending stresses in the printing film occur where they are over the edge of the opening in the spacer film.

Der vorliegenden Erfindung liegt die Aufgabe zgrundn nen eingangs genannten Tastschalter so zu verbessern. Daß örtlich verstärkte Verbiegungen der Druckfolie verringert verd Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das folienartige abstandsteil aus einem elastisch zusammendrückbaren Material besteht.The present invention is based on the object at the outset so-called push button switch to improve. That locally increased bending of the Printing film reduces Verd This object is achieved according to the invention in that the film-like spacer consists of an elastically compressible material.

Durch die Verwendung von elastischem zusammendrückbarem Materials sis Abstandsmaterial wird erreicht, das bei Ausäber eines Druckes &uf die Druckfolie diese in den Randbereichen der Durchbrüche der Abstandsfolie wenige stark gebegen bzw. geknickt wird, so daß die Elastizität der Druckfelie über einen längeren Zeitraum hinweg verbessert erhalten bleibt. Die beschriebene Anordnung ist verteilhaft anksmdben sowohl bei Tastschaltern, bei denen der Druck direkt z. B, von einem Finger ausgeübt wird, als auch bei Tastschaltern, bei welchen der Druck auf die Druckfolie durch ein geschaltetes Teil,z. B. ein Stößel ausgeübt wird.By using elastic compressible material This spacing material is achieved when a print is erased on the printing film these in the edge areas of the openings in the spacer film are a few strongly or is kinked, so that the elasticity of the Druckfelie over a longer period of time remains improved over and over. The described arrangement is distributable both with pushbutton switches, where the pressure is directly z. B, exercised by a finger is, as well as with pushbutton switches, with which the pressure on the printing film through a switched part, e.g. B. a plunger is exercised.

Anhand des in der Figur schematisch im Querschnitt darscstellten Ausführungsbeispiels wird die Erfindung nachfolgend näher erläutert.On the basis of the embodiment shown schematically in cross section in the figure the invention is explained in more detail below.

In der Figur ist mit D der jeweilige Druckbereich sowie c Druckrichtung zur Betätigung des Tastschalters angegeben.In the figure, D is the respective printing area and c is the printing direction specified for actuating the pushbutton switch.

Die Druckfolie 1 besteht in an sich bekannter Weise aus einem elastischem Kunststoff, z. B. einer PETP-Folie, die an ihrer Oberfläche mit Markierungen optischer oder tastbarer Art versehen sein kann. An der Unterseite der Folie 1 befinden sich eine oder mehrere Flächenelektroden 2, die aus einer aufgebrachten leitfähigen Schicht oder einer aufgebrachten Folie bestehen können Ferner ist eine Bodenplatte 4 vorhanden,die bevorzugt aus einem stärkeren, starren Material besteht und auf ihrer Oberseite mit einer oder mehreren Flächenelektroden 5 versehen ist. Diese Oberflächenelekroden sind ebenfalls bevorzugt als leitfähige Schichten insbesondere in Leitsilberdrucktechnik aufgebracht.The printing film 1 consists of an elastic one in a manner known per se Plastic, e.g. B. a PETP film with markings on its surface or tactile type. On the underside of the slide 1 are one or more surface electrodes 2, which consist of one angry conductive layer or an applied film can also exist Base plate 4 present, which is preferably made of a stronger, rigid material and is provided with one or more surface electrodes 5 on its upper side. These surface electrodes are also preferred as conductive layers in particular applied in conductive silver printing technology.

der Druckbereichen 1) oird Durchbrüche 6 in. einer Abstendsfolie 3 zugeordnet. Diese Abstandsfolie 3 kann ggf.of the printing areas 1) or openings 6 in an evening film 3 assigned. This spacer film 3 can optionally

nach aus mer-eren einzelnen Teilen oder Stegen bestehen.consist of several individual parts or webs.

wesentliches Merkmal der vorliegenden Erfindung ist diese Abstandsfolie 3 aus einem elastisch zusammendrückberum Material hergestellt. Bevorzugt wird dazu ein gummi-oder schaemstoffartiges Material verwendet, das bei Ausüber eines Druckes, z, B. auf die Hälfte oder ein Viertel seiner Dicke zusammendrückbar ist. Bei Ausüben eines Druckes in den Druckbereichen D aif die Druckfolie 1 werden dabei duch die Kantenbereiche 7 der Abstandsfolie 3 zusammengedriickt, so daß die Druckfolie 1 mit den Flächenelektroden 2 m Bereich der Kanten 7 weniger stark abgebogen bzw. abge-:nicRt wird Der gesamte Aufbau wird zweckmäßig durch sandwichartiges Aneinanderkleben der einzelnen Folien hergestellt. This spacer film is an essential feature of the present invention 3 made of an elastically compressible material. It is preferred to do this a rubber or foam-like material is used which, when a pressure is applied, e.g. is compressible to half or a quarter of its thickness. When exercising of a print in the print areas D aif the printing film 1 are thereby by the Edge areas 7 of the spacer film 3 pressed together so that the printing film 1 with the flat electrodes 2 m area of the edges 7 less strongly bent or The entire structure is expediently made by gluing together in a sandwich-like manner of the individual foils.

LeerseiteBlank page

Claims (5)

Patentansprüche 1. Tastschalter mit einer elastischen Druckfolie aus material, die zumindest in den Druckbereichen auf ihrer Unterseite mit Flächenelektroden versehen ist, mit Nanigstens einem folienartigen Abstandsteil aus Isoliermaterial. Claims 1. Push button switch with an elastic pressure film Made of material, at least in the pressure areas on their underside with surface electrodes is provided with at least one film-like spacer made of insulating material. das in den Schaltbereichen mit entsprechend gefermten Druchbrüchen versehen ist und einer Bodenplatte oder Bodemfolie, die auf ihrer Oberseite in den Druckbsreichen riiit wanigstens einer Flächenelektrode versehen ist, so daß be Ausüben eines Druckes auf die Druckfolie, deren Flächenelektroden die gegenüberliegende Flächenelektrode er Bodenplatte elektrisch kontaktiert, d a d u r c h g e k e n n z e i d h n e t daß das folienartige Abstandsteil aus einem elastisch zusammendrückbaren Material besteht. that in the switching areas with correspondingly shaped breakthroughs is provided and a bottom plate or bottom foil, which on its top in the At least one surface electrode is provided with pressure-exerting force, so that it can be exercised a print on the printing film, the surface electrodes of which are opposite Surface electrode electrically contacts the base plate, which is not possible n z e i n e t that the film-like spacer part consists of an elastically compressible Material. 2. Tastschalter nach Anspruch 1, dadurch gekennzeichnet, daß das Abstandsteil aus einem gummiartigen Material besteht. 2. Push button switch according to claim 1, characterized in that the Spacer made of a rubber-like material. 3. Tastschalter nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, daß das Abstandsteil aus einem schaumstcffartigen Material besteht. 3. Push button switch according to claim 1 or claim 2, characterized in that that the spacer consists of a foam-like material. 4. Tastschalter nach einem der Ansprüche 1 bis 3, dadruch gekennzeichnet, daß die Flächenelcktroden aus aufgedruckten Schichten aus elektrisch leitendem Material, insbesondere Leitsilberdruckschichten bestehen.4. Push button switch according to one of claims 1 to 3, characterized in that that the surface electrodes are made of printed layers of electrically conductive material, in particular conductive silver printing layers exist. 5. Tastschalter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Flächenelektroden aus Metallfolie bestehen.5. Push button switch according to one of claims 1 to 5, characterized in that that the surface electrodes are made of metal foil.
DE19803006591 1980-02-22 1980-02-22 Key pad with foam maintained contact gap - has underside contact on top pressure layer separated from base contact by collapsible foam sides Ceased DE3006591A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803006591 DE3006591A1 (en) 1980-02-22 1980-02-22 Key pad with foam maintained contact gap - has underside contact on top pressure layer separated from base contact by collapsible foam sides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803006591 DE3006591A1 (en) 1980-02-22 1980-02-22 Key pad with foam maintained contact gap - has underside contact on top pressure layer separated from base contact by collapsible foam sides

Publications (1)

Publication Number Publication Date
DE3006591A1 true DE3006591A1 (en) 1981-08-27

Family

ID=6095244

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19803006591 Ceased DE3006591A1 (en) 1980-02-22 1980-02-22 Key pad with foam maintained contact gap - has underside contact on top pressure layer separated from base contact by collapsible foam sides

Country Status (1)

Country Link
DE (1) DE3006591A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2543764A1 (en) * 1983-03-31 1984-10-05 Canon Kk INPUT ELEMENT SUCH AS A TABLE SWITCH
US4597177A (en) * 1984-01-03 1986-07-01 International Business Machines Corporation Fabricating contacts for flexible module carriers
US4743722A (en) * 1983-06-03 1988-05-10 Preh Elektrofeinmechanische Werke Jakob Preh Nachf. Gmbh & Co. Touch contact switch with arched switching film
DE9012407U1 (en) * 1990-08-30 1992-01-09 Platz, Karl Otto, 5226 Reichshof, De

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2903898A1 (en) * 1978-02-03 1979-08-09 Canon Kk Flat electronic calculator with operating keyboard - has pushbutton switches with operational stroke greater than keyboard insulating plate
DE2926312A1 (en) * 1979-06-29 1981-01-29 Licentia Gmbh Foil-type press-button switch - has printed contacts on top foil and baseplate separated by perforated insulation foil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2903898A1 (en) * 1978-02-03 1979-08-09 Canon Kk Flat electronic calculator with operating keyboard - has pushbutton switches with operational stroke greater than keyboard insulating plate
DE2926312A1 (en) * 1979-06-29 1981-01-29 Licentia Gmbh Foil-type press-button switch - has printed contacts on top foil and baseplate separated by perforated insulation foil

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2543764A1 (en) * 1983-03-31 1984-10-05 Canon Kk INPUT ELEMENT SUCH AS A TABLE SWITCH
US4743722A (en) * 1983-06-03 1988-05-10 Preh Elektrofeinmechanische Werke Jakob Preh Nachf. Gmbh & Co. Touch contact switch with arched switching film
US4597177A (en) * 1984-01-03 1986-07-01 International Business Machines Corporation Fabricating contacts for flexible module carriers
DE9012407U1 (en) * 1990-08-30 1992-01-09 Platz, Karl Otto, 5226 Reichshof, De

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Legal Events

Date Code Title Description
8127 New person/name/address of the applicant

Owner name: TELEFUNKEN ELECTRONIC GMBH, 7100 HEILBRONN, DE

8120 Willingness to grant licences paragraph 23
8110 Request for examination paragraph 44
8131 Rejection