EP0196633A2 - Key cap for a keyboard disposed in a housing - Google Patents

Key cap for a keyboard disposed in a housing Download PDF

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Publication number
EP0196633A2
EP0196633A2 EP86104262A EP86104262A EP0196633A2 EP 0196633 A2 EP0196633 A2 EP 0196633A2 EP 86104262 A EP86104262 A EP 86104262A EP 86104262 A EP86104262 A EP 86104262A EP 0196633 A2 EP0196633 A2 EP 0196633A2
Authority
EP
European Patent Office
Prior art keywords
housing
key cap
keycap
peg
light
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
EP86104262A
Other languages
German (de)
French (fr)
Other versions
EP0196633B1 (en
EP0196633A3 (en
Inventor
Reinhold Kiesewetter
Gerd Nothnagel
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to AT86104262T priority Critical patent/ATE67340T1/en
Publication of EP0196633A2 publication Critical patent/EP0196633A2/en
Publication of EP0196633A3 publication Critical patent/EP0196633A3/en
Application granted granted Critical
Publication of EP0196633B1 publication Critical patent/EP0196633B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/52—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 immediately upon removal of operating force, e.g. bell-push switch
    • 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
    • H01H13/023—Light-emitting indicators
    • 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
    • H01H9/18—Distinguishing marks on switches, e.g. for indicating switch location in the dark; Adaptation of switches to receive distinguishing marks
    • H01H9/182—Illumination of the symbols or distinguishing marks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/036—Light emitting elements
    • H01H2219/052—Phosphorescence
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/062—Light conductor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/036—Return force
    • H01H2221/044—Elastic part on actuator or casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/054—Mounting of key housings on same printed circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2233/00—Key modules
    • H01H2233/03—Key modules mounted on support plate or frame
    • H01H2233/04—Key modules mounted on support plate or frame captured between assembled parts of support
    • H01H2233/042—Key modules mounted on support plate or frame captured between assembled parts of support with limited freedom

Definitions

  • the invention relates to a key cap for a keyboard arranged in a device of the electrical communication technology, in particular the operating device of a telephone device, which is inserted into a housing opening of the device and can be pressed via a pin against a button arranged inside the housing for its actuation, in which the With lateral play in the housing opening insertable key cap with a correspondingly formed pin on at least one, parallel to the housing opening side has an inclined at an acute angle to the housing, biased spring element, which is supported on a stop surface in the housing and with the top of the by Spring elements formed, with respect to the housing opening in the diameter enlarged, laterally projecting contact surfaces on the housing inner wall and in which the symbols consist of a translucent plastic and a non-opaque plastic of the keyboard vice versa ben are.
  • the operating device of a telephone device can either be a separate device with an associated handset, as is generally the case, or a handset in which the dialing and display units are integrated. In both cases keyboards are required, which are actuated by means of key caps inserted into the housing openings.
  • the invention has for its object to provide a structure for such keys described in the aforementioned DE-OS 33 46 485, which makes it possible to get by with the simplest possible for different symbols essentially constant injection molds.
  • the button on the front side consists of a separate, light-permeable layer 11 with raised symbols, firmly attached to the crystal-clear, light-guiding base body of the button, the depressions of which are made up of velvet symbols form the third opaque plastic, the third layer 12 firmly connected to the base body.
  • the keycap 1 consists of a downwardly open, half-shell-shaped plastic part of rectangular shape, on the longitudinal and transverse sides of which spring elements 2 are attached, preferably pointed. These spring elements 2 are fastened to the corners of the key cap 1 and run at an acute angle against the horizontal plane downwards, ie towards the housing 6, into which they are inserted.
  • the key cap 1 is stepped at the top, the middle, raised part 3 of the key cap 1 being provided with the number or the symbol with which the key cap 1 is to be identified.
  • the number or symbol consists of a translucent layer 11 made of differently colored, fluorescent plastic. This layer 11 is firmly connected to a plastic part 4, which forms the main body of the button.
  • This base body ' consists of a translucent plastic that merges into a pin 5 on the underside. A light-collecting, crystal-clear plastic is used for this, which serves as a light guide with a light-collecting effect.
  • Layer 11 is relatively thin e.g. only 0.4 mm and shows the symbol raised.
  • the layer structure can be clearly seen from FIG.
  • This third layer also carries the spring elements 2 described in the main patent.
  • Fig. 5 shows the key cap 1 described above in the installed state.
  • Several keycaps are useful arranged in a remainder and provided with the symbols corresponding to their function.
  • the associated buttons 8 are attached in the same grid, for example on a printed circuit board 10 and soldered in the example shown via solder connections 9.
  • the key cap 1 is inserted into the opening of a housing 6.
  • a lateral play is provided to prevent the key cap 1 from jamming.
  • the spring elements 2 are supported on a stop surface which is formed by a light guide 7 which has a correspondingly designed bore for receiving the pin 5 of the key cap 1.
  • the light guide 7 serves to supply the light to the numbers or symbols in the key cap 1.
  • the key cap 1 is pressed with its pin 5 onto the key 8 and is reset by the four spring elements 2 attached laterally to the key cap 1 in the exemplary embodiment.
  • This spring element 2 which is made of a correspondingly elastic plastic, also ensures that the keycaps do not rattle in the housing and an undesirable noise occurs when driving.

Landscapes

  • Push-Button Switches (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Epoxy Compounds (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Telephone Set Structure (AREA)

Abstract

The invention relates to a keycap for a control unit of a telephone device, in which the keyboard is arranged inside the housing and can be pressed by means of a peg connected to the key cap for operation. The keycap, inserted in a housing opening, is provided with one or more pointed spring elements (2) on the side, which run downwards at an acute angle and are supported on a light conductor (7) in whose hole the peg (5) is inserted. Light is directed via the light conductor and peg to the characters and symbols which consist of a light-collecting plastic. Such a keycap is described in more detail in the main patent. The invention proposes a three layer construction of the keycap, the base body (4, 5) provided with the peg consisting of a clear-glass material, onto which a relatively thin layer (11) is applied with elevated symbols and around which, once again, there is fixedly arranged an opaque layer (12) with spring elements (2). <IMAGE>

Description

Die Erfindung bezieht sich auf eine Tastenkappe für eine in einem Gerät der elektrischen Nachrichtentechnik angeordnete Tastatur, insbesondere das Bediengerät einer Telefoneinrichtung, die in eine Gehäuseöffnung des Gerätes eingesetzt und über einen Zapfen gegen eine im Gehäuseinneren angeordnete Taste zu deren Betätigung andrückbar ist, bei der die mit seitlichem Spiel in die Gehäuseöffnung einsetzbare Tastenkappe mit entsprechend ausgebildetem Zapfen an wenigstens einer, parallel zur Gehäuseöffnung verlaufenden Seite ein unter einem spitzen Winkel zum Gehäuse hin geneigtes, vorgespanntes Federelement aufweist, das an einer Anschlagfläche im Gehäuse abgestützt ist und mit der Oberseite der durch die Federelemente gebildeten, gegenüber der Gehäuseöffnung im Durch messer vergrößerten, seitlich überstehenden Anlageflächen an der Gehäuseinnenwand anliegt und bei der die Symbole aus einem lichtdurchlässigen Kunststoff bestehen und von einem liehtundurchlässigen Kunststoff der Tastatur umgeben sind.The invention relates to a key cap for a keyboard arranged in a device of the electrical communication technology, in particular the operating device of a telephone device, which is inserted into a housing opening of the device and can be pressed via a pin against a button arranged inside the housing for its actuation, in which the With lateral play in the housing opening insertable key cap with a correspondingly formed pin on at least one, parallel to the housing opening side has an inclined at an acute angle to the housing, biased spring element, which is supported on a stop surface in the housing and with the top of the by Spring elements formed, with respect to the housing opening in the diameter enlarged, laterally projecting contact surfaces on the housing inner wall and in which the symbols consist of a translucent plastic and a non-opaque plastic of the keyboard vice versa ben are.

Eine derartige Einrichtung ist in der DE-OS 33 46 485 beschrieben. Telefoneinrichtungen benötigen zum Verbindungsaufbau von Gesprächen Bediengeräte und Wähleinrichtungen, die bisher meist mit einer drehbaren Wählscheibe versehen sind. Es gibt aber auch Einrichtungen dieser Art und insbesondere Autotelefoneinrichtungen, die Bediengeräte mit Wahltastaturen aufweisen, durch welche der Wahlvorgang wesentlich erleichtert wird. Die Tastaturen sind dabei mit Ziffern oder Symbolen entsprechend ihrer Funktion versehen, die überwiegend aufgedruckt sind.Such a device is described in DE-OS 33 46 485. Telephone devices require operating devices and dialing devices to set up calls, which have so far mostly been provided with a rotating dial. However, there are also devices of this type and in particular car telephone devices which have operating devices with dialing keypads, through which the election process is made considerably easier. The keyboards are provided with numbers or symbols according to their function, most of which are printed.

Das Bediengerät einer Telefoneinrichtung kann entweder eine-separate Einrichtung mit einem dazugehörigen Hörer sein, wie dies allgemein der Fall ist, oder aber ein Handapparat, in den die Wahl- und Anzeigeeinheiten integriert sind. In beiden Fällen sind Tastaturen erforderlich-, die mittels in Gehäuseöffnungen eingesetzter Tastenkappen betätigt werden.The operating device of a telephone device can either be a separate device with an associated handset, as is generally the case, or a handset in which the dialing and display units are integrated. In both cases keyboards are required, which are actuated by means of key caps inserted into the housing openings.

Der Erfindung liegt die Aufgabe zugrunde, für solche in der erwähnten DE-OS 33 46 485 beschriebenen Tasten einen Aufbau anzugeben, der es ermöglicht mit möglichst einfachen für verschiedene Symbole im wesentlichen gleichbleibenden Spritzwerkzeugen auszukommen.The invention has for its object to provide a structure for such keys described in the aforementioned DE-OS 33 46 485, which makes it possible to get by with the simplest possible for different symbols essentially constant injection molds.

Diese Aufgabe wird bei einer Anordnung der eingangs erwähnten Art gemäß der Erfindung in der Weise gelöst, daß die Taste frontseitig aus einer getrennten, fest mit dem glasklaren, lichtleitenden Grundkörper der Taste verbundenen, dünnen, lichtdurchlässigen Schicht 11 mit erhabenen Symbolen besteht, deren Vertiefungen samt dem lichtundurchlässigen Kunststoff die dritte fest mit dem Grundkörper verbundene Schicht 12 bilden.This object is achieved in an arrangement of the type mentioned according to the invention in such a way that the button on the front side consists of a separate, light-permeable layer 11 with raised symbols, firmly attached to the crystal-clear, light-guiding base body of the button, the depressions of which are made up of velvet symbols form the third opaque plastic, the third layer 12 firmly connected to the base body.

Vorteilhafte Ausgestaltungen und Weiterbildungen des Erfindungsgegenstandes sind in den Unteransprüchen angegeben.Advantageous refinements and developments of the subject matter of the invention are specified in the subclaims.

Nachstehend wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispieles näher erläutert. Es zeigen

  • Fig. 1 bis 4 eine Tastenkappe in zwei Seitenansichten, einer Draufsicht und einem Längsschnitt,
  • Fig. 5 eine Tastenkappe im eingebauten Zustand.
The invention is explained in more detail below on the basis of an exemplary embodiment shown in the drawing. Show it
  • 1 to 4 a key cap in two side views, a plan view and a longitudinal section,
  • Fig. 5 shows a key cap in the installed state.

Die Tastenkappe 1 besteht aus einem nach unten offenen, halbschalenförmigen Kunststoffteil rechteckförmiger Gestalt, an dessen Längs- und Querseiten Federelemente 2 angebracht, vorzugsweise angespitzt sind. Diese Federelemente 2 sind an den Ecken der Tastenkappe 1 befestigt und verlaufen in einem spitzen Winkel gegen die horizontale Ebene nach unten, also zum Gehäuse 6 hin, in das sie eingesetzt werden. An der Oberseite ist die Tastenkappe 1 stufenförmig abgesetzt, wobei der mittlere, erhöhte Teil 3 der Tastenkappe 1 mit der Ziffer oder dem Symbol versehen ist, mit der die Tastenkappe 1 gekennzeichnet werden soll. Die Ziffer bzw. das Symbol besteht aus einer lichtdurchlässigen Schicht 11 aus verchiedenfarbigem, fluoreszierendem Kunststoff. Diese Schicht 11 ist fest mit einem Kunststoffteil 4 verbunden, der den Grundkörper der Taste bildet. Dieser Grundkörper besteht' aus einem lichtdurchlässigen Kunststoff, der unterseitig in einen Zapfen 5 übergeht. Hierfür wird ein lichtsammelnder, glasklarer Kunststoff verwendet, der als Lichtleiter mit Lichtsammeleffekt dient.The keycap 1 consists of a downwardly open, half-shell-shaped plastic part of rectangular shape, on the longitudinal and transverse sides of which spring elements 2 are attached, preferably pointed. These spring elements 2 are fastened to the corners of the key cap 1 and run at an acute angle against the horizontal plane downwards, ie towards the housing 6, into which they are inserted. The key cap 1 is stepped at the top, the middle, raised part 3 of the key cap 1 being provided with the number or the symbol with which the key cap 1 is to be identified. The number or symbol consists of a translucent layer 11 made of differently colored, fluorescent plastic. This layer 11 is firmly connected to a plastic part 4, which forms the main body of the button. This base body 'consists of a translucent plastic that merges into a pin 5 on the underside. A light-collecting, crystal-clear plastic is used for this, which serves as a light guide with a light-collecting effect.

Die Schicht 11 ist relativ dünn z.B. nur 0,4 mm und bildet das Symbol erhaben ab. Die Vertiefungen rings um das Symbol samt der Umrandung bilden die dritte, fest mit den übrigen Teilen 4, 5, 11 verbundene lichtundurchlässige Schicht 12. Der Schichtaufbau ist aus der Figur 4 deutlich ersichtlich. Diese dritte Schicht trägt auch die im Hauptpatent beschriebenen Federelemente 2.Layer 11 is relatively thin e.g. only 0.4 mm and shows the symbol raised. The depressions around the symbol, together with the border, form the third opaque layer 12, which is firmly connected to the other parts 4, 5, 11. The layer structure can be clearly seen from FIG. This third layer also carries the spring elements 2 described in the main patent.

Fig. 5 zeigt die vorstehend beschriebene Tastenkappe 1 im eingebauten Zustand. Mehrere Tastenkappen sind zweckmäßig in einem Rester angeordnet und mit den ihrer Funktion entsprechenden Symbolen versehen. Die zugehörigen Tasten 8 sind im gleichen Raster beispielsweise auf einer Leiterplatte 10 angebracht und im dargestellten Beispiel über Lötanschlüsse 9 eingelötet.Fig. 5 shows the key cap 1 described above in the installed state. Several keycaps are useful arranged in a remainder and provided with the symbols corresponding to their function. The associated buttons 8 are attached in the same grid, for example on a printed circuit board 10 and soldered in the example shown via solder connections 9.

Die Tastenkappe 1 ist in die öffnung eines Gehäuses 6 eingesetzt. Hierbei ist ein seitliches Spiel vorgesehen, um ein Klemmen der Tastenkappe 1 zu verhindern. Mit der Oberseite der seitlich angebrachten Federelemente 2 liegt die Tastenkappe 1 an der Gehäuseinnenwand an. Die Federelemente 2 sind an einer Anschlagfläche abgestützt, die von einem Lichtleiter 7 gebildet wird, der eine entsprechend ausgebildete Bohrung zur Aufnahme des Zapfens 5 der Tastenkappe 1 aufweist. Der Lichtleiter 7 dient der Zuführung des Lichtes an die Ziffern bzw. Symbole in der Tastenkappe 1.The key cap 1 is inserted into the opening of a housing 6. Here, a lateral play is provided to prevent the key cap 1 from jamming. With the top of the laterally attached spring elements 2, the key cap 1 rests on the inner wall of the housing. The spring elements 2 are supported on a stop surface which is formed by a light guide 7 which has a correspondingly designed bore for receiving the pin 5 of the key cap 1. The light guide 7 serves to supply the light to the numbers or symbols in the key cap 1.

Zur Betätigung wird die Tastenkappe 1 mit ihrem Zapfen 5 auf die Taste 8 gedrückt und durch die im Ausführungsbeispiel vier an der Tastenkappe 1 seitlich angebrachten Federelemente 2 zurückgestellt. Durch diese aus einem entsprechend elastischen Kunststoff bestehenden Federelement 2 ist auch gewährleistet, daß die Tastenkappen nicht im Gehäuse klappern und ein beim Fahren unerwünschtes Geräusch entsteht.For actuation, the key cap 1 is pressed with its pin 5 onto the key 8 and is reset by the four spring elements 2 attached laterally to the key cap 1 in the exemplary embodiment. This spring element 2, which is made of a correspondingly elastic plastic, also ensures that the keycaps do not rattle in the housing and an undesirable noise occurs when driving.

Der Aufbau aus drei Schichten bringt eine erhebliche Fertigungsvereinfachung mit sich, da die wesentlichen Teile der Taste für alle Symbolarten gleich bleiben und damit Spritzwerkzeuge eingespart werden.The structure of three layers brings a considerable simplification of production with it, since the essential parts of the button remain the same for all types of symbols and thus spraying tools are saved.

Claims (12)

1 Tastenkappe1 key cap 2 Federelemente2 spring elements 3 erhöhter Teil der Tastenkappe 13 elevated part of the keycap 1 4 Kunststoffteil4 plastic part 5 Zapfen5 cones 6 Gehäuse6 housing 7 Lichtleiter7 light guides 8 Tasten8 buttons 9 Lötanschlüsse9 solder connections 10 Leiterplatte10 circuit board 11 lichtdurchlässige Schicht11 translucent layer 12 lichtundurchlässige Schicht12 opaque layer
EP86104262A 1985-04-04 1986-03-27 Key cap for a keyboard disposed in a housing Expired - Lifetime EP0196633B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86104262T ATE67340T1 (en) 1985-04-04 1986-03-27 KEYCAP FOR AN ENCLOSED KEYBOARD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3512386 1985-04-04
DE19853512386 DE3512386A1 (en) 1985-04-04 1985-04-04 KEY COVER FOR A KEYBOARD ARRANGED IN A HOUSING

Publications (3)

Publication Number Publication Date
EP0196633A2 true EP0196633A2 (en) 1986-10-08
EP0196633A3 EP0196633A3 (en) 1989-03-15
EP0196633B1 EP0196633B1 (en) 1991-09-11

Family

ID=6267333

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86104262A Expired - Lifetime EP0196633B1 (en) 1985-04-04 1986-03-27 Key cap for a keyboard disposed in a housing

Country Status (7)

Country Link
EP (1) EP0196633B1 (en)
AT (1) ATE67340T1 (en)
DE (2) DE3512386A1 (en)
DK (1) DK151286A (en)
FI (1) FI861405A (en)
NO (1) NO861258L (en)
ZA (1) ZA862455B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0439814A2 (en) * 1990-02-02 1991-08-07 Stefan Schmitt-Walter Illuminated push button switch
EP0470403A2 (en) * 1990-08-07 1992-02-12 Siemens Aktiengesellschaft Keyboard and legend lighting
EP0577502A1 (en) * 1992-07-01 1994-01-05 Valeo Commutation Control panel with tip keys, specifically for the control of an air-conditioning installation in the passenger compartment of a motor car
FR2693285A1 (en) * 1992-07-01 1994-01-07 Valeo Commutation Automobile air conditioning control panel appts. - uses buttons illuminated from rear acting on switches through narrow connecting rods sliding in guides
FR2696020A1 (en) * 1992-09-21 1994-03-25 Team Control switch button, esp. for aircraft instrument panel - has illuminated translucent front face surrounded by crown of heat-resistant reflective material, e.g. PTFE
WO1998049700A1 (en) * 1997-04-25 1998-11-05 Trw Automotive Electronics & Components Gmbh & Co. Kg Method for producing an aperture part, an actuating part or similar parts with function symbols, for illumination by transmitted light
EP1418601A2 (en) * 2002-11-05 2004-05-12 Medion AG Switch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4323878A1 (en) * 1993-07-16 1995-01-19 Abb Patent Gmbh Push button module for switching

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1034737B (en) * 1952-09-19 1958-07-24 Siemens Ag Change plate for switch housing, especially of pushbutton buttons
DE6805771U (en) * 1968-11-07 1969-04-17 Busch Jaeger Dorener Metallwer ELECTRICAL INSTALLATION DEVICE WITH MARKING
DE6910557U (en) * 1969-03-15 1969-12-04 Grundig Emv SWITCHING DEVICE WITH PUSH BUTTON, IN PARTICULAR FOR ELECTRIC MESSAGE DEVICES
DE2803539A1 (en) * 1978-01-27 1979-08-02 Blaupunkt Werke Gmbh Pushbutton head for car radio keyboard - has light conductor inside housing forming uniform section at housing front opaque surface with transparent symbol
DE3112328A1 (en) * 1981-03-28 1982-10-07 Robert Bosch Gmbh, 7000 Stuttgart Push-button switch having a pushbutton in the form of a cap
EP0148437A1 (en) * 1983-12-22 1985-07-17 Siemens Aktiengesellschaft Key cap for a keyboard mounted in a housing

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1034737B (en) * 1952-09-19 1958-07-24 Siemens Ag Change plate for switch housing, especially of pushbutton buttons
DE6805771U (en) * 1968-11-07 1969-04-17 Busch Jaeger Dorener Metallwer ELECTRICAL INSTALLATION DEVICE WITH MARKING
DE6910557U (en) * 1969-03-15 1969-12-04 Grundig Emv SWITCHING DEVICE WITH PUSH BUTTON, IN PARTICULAR FOR ELECTRIC MESSAGE DEVICES
DE2803539A1 (en) * 1978-01-27 1979-08-02 Blaupunkt Werke Gmbh Pushbutton head for car radio keyboard - has light conductor inside housing forming uniform section at housing front opaque surface with transparent symbol
DE3112328A1 (en) * 1981-03-28 1982-10-07 Robert Bosch Gmbh, 7000 Stuttgart Push-button switch having a pushbutton in the form of a cap
EP0148437A1 (en) * 1983-12-22 1985-07-17 Siemens Aktiengesellschaft Key cap for a keyboard mounted in a housing

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0439814A2 (en) * 1990-02-02 1991-08-07 Stefan Schmitt-Walter Illuminated push button switch
EP0439814A3 (en) * 1990-02-02 1992-07-29 Stefan Schmitt-Walter Illuminated push button switch
EP0470403A2 (en) * 1990-08-07 1992-02-12 Siemens Aktiengesellschaft Keyboard and legend lighting
EP0470403A3 (en) * 1990-08-07 1992-09-16 Siemens Aktiengesellschaft Keyboard and legend lighting
EP0577502A1 (en) * 1992-07-01 1994-01-05 Valeo Commutation Control panel with tip keys, specifically for the control of an air-conditioning installation in the passenger compartment of a motor car
FR2693285A1 (en) * 1992-07-01 1994-01-07 Valeo Commutation Automobile air conditioning control panel appts. - uses buttons illuminated from rear acting on switches through narrow connecting rods sliding in guides
FR2693286A1 (en) * 1992-07-01 1994-01-07 Valeo Commutation Control panel with keys, in particular for controlling an air conditioning installation in the passenger compartment of a motor vehicle.
FR2696020A1 (en) * 1992-09-21 1994-03-25 Team Control switch button, esp. for aircraft instrument panel - has illuminated translucent front face surrounded by crown of heat-resistant reflective material, e.g. PTFE
WO1998049700A1 (en) * 1997-04-25 1998-11-05 Trw Automotive Electronics & Components Gmbh & Co. Kg Method for producing an aperture part, an actuating part or similar parts with function symbols, for illumination by transmitted light
EP1418601A2 (en) * 2002-11-05 2004-05-12 Medion AG Switch

Also Published As

Publication number Publication date
DK151286A (en) 1986-10-05
NO861258L (en) 1986-10-06
EP0196633B1 (en) 1991-09-11
DE3512386A1 (en) 1986-10-09
DE3681314D1 (en) 1991-10-17
DK151286D0 (en) 1986-04-03
FI861405A0 (en) 1986-04-01
EP0196633A3 (en) 1989-03-15
FI861405A (en) 1986-10-05
ZA862455B (en) 1986-11-26
ATE67340T1 (en) 1991-09-15

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