DE3218404A1 - Keypad for a printed circuit - Google Patents

Keypad for a printed circuit

Info

Publication number
DE3218404A1
DE3218404A1 DE19823218404 DE3218404A DE3218404A1 DE 3218404 A1 DE3218404 A1 DE 3218404A1 DE 19823218404 DE19823218404 DE 19823218404 DE 3218404 A DE3218404 A DE 3218404A DE 3218404 A1 DE3218404 A1 DE 3218404A1
Authority
DE
Germany
Prior art keywords
keypad
silicone rubber
printed circuit
contact bridges
rubber 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.)
Ceased
Application number
DE19823218404
Other languages
German (de)
Inventor
Wolfgang Schulte
Sigrid Tamboers
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DE19823218404 priority Critical patent/DE3218404A1/en
Publication of DE3218404A1 publication Critical patent/DE3218404A1/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
    • H01H13/78—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 characterised by the contacts or the contact sites
    • H01H13/785—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 characterised by the contacts or the contact sites characterised by the material of the contacts, e.g. conductive polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/46—Knobs or handles, push-buttons, grips
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2201/00—Contacts
    • H01H2201/022—Material
    • H01H2201/032—Conductive polymer; Rubber
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/002—Casings sealed
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/044—Injection moulding
    • H01H2229/046—Multi-colour or double shot injection moulding

Abstract

The invention relates to a keypad for a printed circuit having a switching mat consisting of an elastomer and having yielding knobs with silicone-rubber contact bridges on the inner side. The technical problem of the invention is the integration of the keys and the keypad. The keypad (1) is formed as a one-piece injection moulding enclosing the switching mat (2). The silicone-rubber contact bridges (6) are moulded onto the inner side of the knobs (3). The upper side of the knobs (3) has moulded-in key symbols (7). <IMAGE>

Description

Tastenfeld für eine gedruckte Schaltung Keypad for a printed circuit board

Beschreibung Die Erfindung betrifft ein Tastenfeld für eine gedruckte Schaltung mit einer aus einem Elastometer bestehenden Schaltmatte, die nachgiebige Höcker mit Siliconkautschukkontaktbrücken auf der Innenseite aufweist. Description The invention relates to a keypad for a printed Circuit with a safety mat consisting of an elastometer, the flexible Has bumps with silicone rubber contact bridges on the inside.

Ein derartiges Tastenfeld besitzt Tasten, die auf die Höcker der Schaltmatte ausgerichtet sind. Die Tasten mlissen in besonderen Führungen eines Gehäuses geführt sein. Eine solche Anordnung ist infolgedessen außerordentlich aufwendig in der Herstellung. Auch bei der Bedienung ergeben sich Unbequemlichkeiten. Such a keypad has keys on the humps of the Safety mat are aligned. The keys needed one in special tours Housing to be performed. As a result, such an arrangement is extremely complex in production. There are also inconveniences in operation.

Aufgabe der Erfindung ist eine Integration der Tasten und des Tastenfeldes. The object of the invention is to integrate the keys and the keypad.

Diese Aufgabe wird nach der Erfindung dadurch gelöst, daß das Tastenfeld als einstückiges, die Schaltmatte einschließendes Spritzgießteil ausgebildet ist, daß die Siliconkautschukkontaktbrücken auf der Innenseite der Hecker angeformt sind und daß die Oberseite der Hocker eingeformte Tastensymbole aufweist. This object is achieved according to the invention in that the keypad is designed as a one-piece injection molded part enclosing the safety mat, that the silicone rubber contact bridges are molded on the inside of the Hecker and that the top of the stool has molded key symbols.

Das Tastenfeld nach der Erfindung unterscheidet sich dadurch in nichtnaheliegender Weise vom Stand der Technik, als die Schaltmatte selbst als SpritzgieI3teil ausgebildet ist und die Höcker als Tasten dienen. Dadurch erzielt man eine konstruktive Vereinfachung hinsichtlich der Herstellung und hinsichtlich des Gebrauchs des Tastenfeldes, weil das Tastenfeld alle notwendigen Tastenfunktionen und elektrischen Kontaktbrücken einschließt. Das Tastenfeld ist infolge seiner einstückigen Ausbildung als Spritzgießteil über seine gesamte Fläche feuchtigkeitsdicht, so daß das Tastenfeld bei Einspannung am Rande eine vollständige Abdichtung des Gerateinnenraumes bietet. The keypad according to the invention differs thereby in non-obvious Way from the state of the art, as the switching mat itself is designed as an injection-molded part is and the humps serve as buttons. This achieves a structural simplification in terms of the manufacture and use of the keypad because the keypad has all the necessary key functions and electrical contact bridges includes. As a result of its one-piece design, the keypad is an injection molded part Moisture-proof over its entire surface, so that the keypad is clamped in place at the edge offers complete sealing of the interior of the device.

In weiterer Ausbildung ist vorgesehen, daß das Tastenfeld, die Siliconkautschukkontaktbrücken und die Tastensymboje als stoffRchltissig miteinander verbunde Spritzgießteile ausgebildet sind. Damit lassen sich die verschiedenen Funktionstei#e des Tastenfeldes in einem integrierten taktgesteuerten Spritzgießverfahren herstellen. In a further training it is provided that the keypad that Silicone rubber contact bridges and the key symbol is designed as injection-molded parts that are materially connected to one another are. This allows the various functional parts of the keypad to be combined in one manufacture integrated cycle-controlled injection molding processes.

Eine Ausführungsform der Erfindung wird im folgenden unter Bezugnahme auf die anliegende Zeichnung erläutert, in der darstellen: Fig. 1 eine perspektivische Teilansicht eines Tastenfeldes nach der Erfindung und Fig. 2 einen Schnitt durch ein Tastenfeld. An embodiment of the invention is hereinafter referred to Explained on the attached drawing, in which: Fig. 1 is a perspective Partial view of a keypad according to the invention and FIG. 2 shows a section through a keypad.

Fig. 1 zeigt einen Ausschnitt einen plattenförmigen Tastenfeldes 1. Das plattenförmige Tastenfeld ist ein Spritzgießteil aus Siliconkautschuk. Das Tastenfeld ist als Schaltmatte 2 ausgebildet, die als Tasten dienende Hocker 3 mit einem ebenen Betätigungsfeld 4 aufweist. Fig. 1 shows a section of a plate-shaped keypad 1. The plate-shaped keypad is an injection-molded part made of silicone rubber. That The keypad is designed as a switching mat 2, with the stool 3 serving as keys has a flat field of activity 4.

Die Höcker 3 hängen über umlaufende Stützwände 5 mit verringerter Wandstärke mit der Schaltmatte 2 zusammen, so daß die Tasten infolge derNachgiebigkeit zur Kontaktgabe niedergedrückt werden können.The humps 3 hang over circumferential support walls 5 with reduced Wall thickness with the switching mat 2 together, so that the keys as a result of the flexibility can be depressed to make contact.

Auf der Innenseite jedes Höcker 3 ist eine Siliconkautschukkontaktbrücke 6 aus einer leitfähigen Siliconkautschukzubereitung angeformt. Innerhalb des Betätigungsfeldes 4 jedes höcker 3 ist ein Tastensymbol 7 eingeformt. Es kann sich dabei um Zahlen oder um piktogrammartige Symbole handeln. On the inside of each bump 3 is a silicone rubber contact bridge 6 molded from a conductive silicone rubber preparation. Within the field of activity 4 each bump 3 has a button symbol 7 molded into it. It can be numbers or be pictogram-like symbols.

Die Siliconkautschukkontaktbriicken 6 und die Tastensymbole 7 können stoffschlüssig in die Schaltmatte 2 eingeformt sein. Die Herstellung des Tastenfeldes 1 ist in einem mehrstufigen taktgesteuerten Spritzgießverfahren möglich, wonach verschiedene Siliconkautschukzubereitungen in den aufeinanderfolgenden Arbeitsgängen verspritzt werden, eine Siliconkautschukzubereitung mit elektrisch leitenden Eigenschaften, eine Siliconkautschukzubereitung für das Tastenfeld selbst und eine in anderer Farbe gefärbte Siliconkautschukzubereitung für die Tastensymbole. Das Tastenfeld nach der Erfindung ist ein einstückigeB Bauteil, das sich in einfacher Weise und mit geringem Arbeitsaufwand herstellen lät. Das Tastenfeld kommt ohne besondere Tasten aus, so daß das Tastenfeld nach dem Einspannen in einen Rahmen fertig montiert ist, und kein zusa#tzli<-her Montageaufwand anfällt. The silicone rubber contact bridges 6 and the key symbols 7 can be integrally molded into the switching mat 2. The manufacture of the keypad 1 is possible in a multistage cycle-controlled injection molding process, after which different silicone rubber preparations in the successive operations are sprayed, a silicone rubber preparation with electrically conductive properties, a silicone rubber preparation for the keypad itself and one in a different color colored silicone rubber preparation for the key symbols. The keypad after of the invention is a one-piece component that can be easily assembled with can be produced with little effort. The keypad comes without any special keys off so that the keypad is fully assembled after being clamped in a frame, and there is no additional installation effort.

Das Tastenfeld nach der Erfindung bietet eine vollständige Feuchtigkeitsabdichtung des jeweiligen Gerätegahäuses.The keypad according to the invention provides a complete moisture seal of the respective device housing.

LeerseiteBlank page

Claims (2)

Tastenfeld für eine gedruckte Schaltung Patentanspriiche 1. Tastenfeld für eine gedruckte Schaltung mit einer aus einem Elastomer bestehenden Schaltmatte, die nachgiebige Höcker mit Siliconkautschukkontaktbrücken auf der Innenseite aufweist, dadurch gekennzeichnet, daß das Tastenfeld (1) als einstückiges, die Schaltmatte (2) einschließendes Spritzgießteil ausgebildet ist, daß die Siliconkautschukkontaktbrücken (6) auf der Innenseite der Höcker (3) angeformt sind und daß die Oberseite der Höcker (3) eingeformte Tastensymbole (7) aufweist. Keypad for a printed circuit board. Claims 1. Keypad for a printed circuit with a safety mat made of an elastomer, which has flexible humps with silicone rubber contact bridges on the inside, characterized in that the keypad (1) as a one-piece, the switching mat (2) Enclosing injection molded part is formed that the silicone rubber contact bridges (6) on the inside of the humps (3) are molded and that the top of the humps (3) has molded key symbols (7). 2. Tastenfeld nach Anspruch 1, dadurch gekennzeichnet, daß das Tastenfeld (1), die SiliconkautschukkontaktbrUcken (6) und die Tastensymbole (7) als stoffschltissig miteinander verbundene Spritzgießteile ausgebildet sind. 2. Keypad according to claim 1, characterized in that the keypad (1), the silicone rubber contact bridges (6) and the key symbols (7) as materially bonded injection molded parts connected to one another are formed.
DE19823218404 1982-05-15 1982-05-15 Keypad for a printed circuit Ceased DE3218404A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19823218404 DE3218404A1 (en) 1982-05-15 1982-05-15 Keypad for a printed circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823218404 DE3218404A1 (en) 1982-05-15 1982-05-15 Keypad for a printed circuit

Publications (1)

Publication Number Publication Date
DE3218404A1 true DE3218404A1 (en) 1983-11-17

Family

ID=6163739

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19823218404 Ceased DE3218404A1 (en) 1982-05-15 1982-05-15 Keypad for a printed circuit

Country Status (1)

Country Link
DE (1) DE3218404A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0145458A2 (en) * 1983-12-09 1985-06-19 Toray Silicone Company Limited Method for molding multicolored silicone rubber articles
EP0148611A2 (en) * 1983-12-20 1985-07-17 Toray Silicone Company Limited Method for manufacturing printed moldings
WO1985003595A1 (en) * 1984-02-03 1985-08-15 Npm International Improvements in switches and keyboards
DE3714382A1 (en) * 1986-05-02 1987-11-05 Shinetsu Polymer Co SWITCHING UNIT FOR A PUSHBUTTON PANEL
AT389398B (en) * 1984-06-20 1989-11-27 Sterner Franz CONTACT MAT
DE3923959C1 (en) * 1989-07-17 1990-10-18 Bosse Telekomsysteme Gmbh, 1000 Berlin, De Silicon rubber contact mat - has keyboard with contact buttons and holder for LCD panel
DE19650468C1 (en) * 1996-12-05 1998-03-12 Kundisch Gmbh & Co Kg Foil or membrane keyboard manufacturing method for operator panel in motor vehicle
US6690360B2 (en) 2001-05-03 2004-02-10 3M Innovative Properties Company Liquid proof switch array
US6740832B2 (en) 2002-03-27 2004-05-25 3M Innovative Properties Company Apparatus exhibiting tactile feel
US6827459B2 (en) 2002-03-27 2004-12-07 3M Innovative Properties Company Lighted fastening structure
US7091952B2 (en) 2001-05-03 2006-08-15 3M Innovative Properties Company Liquid proof switch array

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0145458A3 (en) * 1983-12-09 1987-05-13 Toray Silicone Company Limited Method for molding multicolored silicone rubber articles
EP0145458A2 (en) * 1983-12-09 1985-06-19 Toray Silicone Company Limited Method for molding multicolored silicone rubber articles
EP0148611A2 (en) * 1983-12-20 1985-07-17 Toray Silicone Company Limited Method for manufacturing printed moldings
EP0148611A3 (en) * 1983-12-20 1987-05-20 Toray Silicone Company Limited Method for manufacturing printed moldings
US4839474A (en) * 1984-02-03 1989-06-13 Key Innovations Limited Switches and keyboards
US4634818A (en) * 1984-02-03 1987-01-06 Npm International Switches and keyboards
AU584606B2 (en) * 1984-02-03 1989-06-01 Keymat Technology Limited Switches and keyboards
WO1985003595A1 (en) * 1984-02-03 1985-08-15 Npm International Improvements in switches and keyboards
AT389398B (en) * 1984-06-20 1989-11-27 Sterner Franz CONTACT MAT
DE3714382A1 (en) * 1986-05-02 1987-11-05 Shinetsu Polymer Co SWITCHING UNIT FOR A PUSHBUTTON PANEL
DE3923959C1 (en) * 1989-07-17 1990-10-18 Bosse Telekomsysteme Gmbh, 1000 Berlin, De Silicon rubber contact mat - has keyboard with contact buttons and holder for LCD panel
DE19650468C1 (en) * 1996-12-05 1998-03-12 Kundisch Gmbh & Co Kg Foil or membrane keyboard manufacturing method for operator panel in motor vehicle
US6690360B2 (en) 2001-05-03 2004-02-10 3M Innovative Properties Company Liquid proof switch array
US7091952B2 (en) 2001-05-03 2006-08-15 3M Innovative Properties Company Liquid proof switch array
US6740832B2 (en) 2002-03-27 2004-05-25 3M Innovative Properties Company Apparatus exhibiting tactile feel
US6827459B2 (en) 2002-03-27 2004-12-07 3M Innovative Properties Company Lighted fastening structure

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8131 Rejection