EP0148437B1 - Key cap for a keyboard mounted in a housing - Google Patents

Key cap for a keyboard mounted in a housing Download PDF

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Publication number
EP0148437B1
EP0148437B1 EP84115189A EP84115189A EP0148437B1 EP 0148437 B1 EP0148437 B1 EP 0148437B1 EP 84115189 A EP84115189 A EP 84115189A EP 84115189 A EP84115189 A EP 84115189A EP 0148437 B1 EP0148437 B1 EP 0148437B1
Authority
EP
European Patent Office
Prior art keywords
housing
synthetic resin
key cap
resin part
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84115189A
Other languages
German (de)
French (fr)
Other versions
EP0148437A1 (en
Inventor
Reinhold Kiesewetter
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 AT84115189T priority Critical patent/ATE32802T1/en
Publication of EP0148437A1 publication Critical patent/EP0148437A1/en
Application granted granted Critical
Publication of EP0148437B1 publication Critical patent/EP0148437B1/en
Expired 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
    • H01H2219/00—Legends
    • H01H2219/036—Light emitting elements
    • H01H2219/052—Phosphorescence
    • 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
    • H01H2229/00—Manufacturing
    • H01H2229/044—Injection moulding
    • H01H2229/046—Multi-colour or double shot injection moulding

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 against a keyboard arranged inside the housing to actuate it and arranged laterally, has elongated, prestressed spring elements which are supported on a stop surface in the housing.
  • dialing devices which have so far mostly been provided with a rotating dial.
  • dialing devices there are also devices of this type, and in particular car telephone devices, which have operating devices with dialing keyboards, by means of which the dialing process is made considerably easier.
  • the keyboards are provided with numbers or symbols according to their function, most of which are printed.
  • 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.
  • a pressure switch with a cap-shaped push button which essentially corresponds to the key cap described at the beginning.
  • several elastic spring tongues are evenly distributed on the circumference as return springs, each of which protrudes beyond the lower edge of the pushbutton in the actuation direction and is supported downwards on the switch housing.
  • the spring tongues spring back into a recess of the push button when the push button is pressed.
  • the invention has for its object to provide a stable and reliable guide for such key caps in the housing and to ensure good recognition or readability in different lighting conditions for numbers and symbols.
  • the key cap which can be inserted into the housing opening with lateral play, has a downwardly open, half-shell-shaped plastic part of rectangular shape and has a correspondingly configured pin on at least one side running parallel to the housing opening at an acute angle inclined towards the housing, the half-shell-shaped plastic part laterally projecting, prestressed spring element, which is supported on a stop surface in the housing and with the upper side of the contact surfaces formed by the spring elements, enlarged in diameter compared to the housing opening, is laterally protruding on the housing wall, and that the key cap is stepped at the top and is provided in the middle, raised part with a recess corresponding to the identification with a number or a symbol, or the part made of a translucent plastic exist and are connected in a light-conducting manner via a translucent plastic part filling the interior of the opaque half-shell-shaped plastic part to the peg attached to this translucent plastic part.
  • the keycap 1 has 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 molded on. 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 being provided with a recess corresponding to the number or symbol with which the key cap 1 is to be identified.
  • the number or symbol consists of a translucent plastic. They are connected in a light-conducting manner to a pin 5 attached to the plastic part 4 via a plastic part 4, which fills the interior of the key cap made of an opaque plastic with a firm fit.
  • a light-collecting, fluorescent colored plastic is used, which combines the advantageous properties that it is easily legible both during the day and sufficiently illuminated from inside and thus legible at night.
  • Fig. 5 shows the key cap 1 described above in the installed state.
  • Several keycaps are expediently arranged in a grid and provided with the symbols corresponding to their function.
  • the associated buttons 8 are mounted 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 is used 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.
  • These spring elements 2 which are made of a correspondingly elastic plastic, also ensure that the keycaps do not rattle in the housing and an undesirable noise occurs when driving.
  • the integrated spring elements simplify assembly considerably. The elimination of a separate spring not only simplifies assembly, but also reduces costs.

Landscapes

  • Push-Button Switches (AREA)
  • Telephone Set Structure (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Casings For Electric Apparatus (AREA)
  • Purses, Travelling Bags, Baskets, Or Suitcases (AREA)

Abstract

1. A key cap for a keyboard arranged in electrical communications technology apparatus, in particular the operating unit of a telephone installation, which key cap is inserted in an opening in the housing of the apparatus (6) and can be pressed through a pin (5) against a key (8) arranged in the interior of the housing in order to operate the key, and has prestressed, laterally arranged spring elements (2) which are extended longitudinally and abut against a stop face inside the housing, characterized in that the key cap (1), which can be inserted in the opening in the housing with lateral play, and which has a downwardly opening half-shell-shaped synthetic resin part (3) of rectangular shape, with a correspondingly shaped pin (5), has at least one side running parallel to the opening in the housing, a prestressed spring element (2) which is inclined towards the having (6) at an acute angle and projects beyond the half-shell-shaped synthetic resin part (3) at the side, and which spring is pressed against a stop face in the housing (6) and abuts against the inside of the housing wall, with the upper side of the stop faces formed by the spring elements (2), which stop faces have an increased diameter relative to the housing opening and project laterally ; and that the key cap (1) is stepped at its upper face and in its central raised part is provided with a recess with a figure or symbol corresponding to the marking formed by a transparent synthetic resin part (4) connected in light-conducting manner through a transparet synthetic resin part (4) which fills the interior space of the opaque half-shell-shaped synthetic resin part (3), with the pin (5) mounted on this transparent synthetic resin part (4).

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 Tastatur zu deren Betätigung andrückbar ist und seitlich angeordnete, länglich gestreckte, vorgespannte Federeiemente aufweist, die an einer Anschlagfläche im Gehäuse abgestützt 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 against a keyboard arranged inside the housing to actuate it and arranged laterally, has elongated, prestressed spring elements which are supported on a stop surface in the housing.

Telefoneinrichtungen benötigen zum Verbindungsaufbau von Gesprächen Bediengeräte mit 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.To establish calls, telephone devices require operator panels with dialing devices, 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 keyboards, by means of which the dialing 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.

Aus der DE-A-3 112 328 ist ein Druckschalter mit einer kappenförmigen Drucktaste bekannt, die im wesentlichen der eingangs beschriebenen Tastenkappe entspricht. Dabei sind am unteren Rand der Drucktaste mehrere, am Umfang gleichmäßig verteilte, elastische Federzungen als Rückstellfedern angeformt, von denen jeweils ein Bereich über den unteren Rand der Drucktaste in Betätigungsrichtung vorsteht und sich nach unten hin am Schaltergehäuse abstützt. Die Federzungen federn bei Betätigung der Drucktaste in jeweils eine Ausnehmung der Drucktaste zurück.From DE-A-3 112 328 a pressure switch with a cap-shaped push button is known which essentially corresponds to the key cap described at the beginning. At the bottom of the pushbutton, several elastic spring tongues are evenly distributed on the circumference as return springs, each of which protrudes beyond the lower edge of the pushbutton in the actuation direction and is supported downwards on the switch housing. The spring tongues spring back into a recess of the push button when the push button is pressed.

Der Erfindung liegt die Aufgabe zugrunde, für solche Tastenkappen eine stabile und funktionssichere Führung im Gehäuse zu schaffen und eine gute Erkennung bzw. Lesbarkeit bei unterschiedlichen Lichtverhältnissen für Ziffern und Symbole zu gewährleisten.The invention has for its object to provide a stable and reliable guide for such key caps in the housing and to ensure good recognition or readability in different lighting conditions for numbers and symbols.

Diese Aufgabe wird gemäß der Erfindung in der Weise gelöst, daß die mit seitlichem Spiel in die Gehäuseöffnung einsetzbare, ein nach unten offenes, halbschalenförmiges Kunststoffteil rechteckförmiger Gestalt aufweisende Tastenkappe mit entsprechend ausgebildetem Zapfen an wenigstens einer, parallel zur Gehäuseöffnung verlaufenden Seite ein unter einem spitzen Winkel zum Gehäuse hin geneigtes, das halbschalenförmige Kunststoffteil seitlich überragendes, vorgespanntes Federelement aufweist, das an einer Anschlagfläche im Gehäuse abgestützt ist und mit der Oberseite der durch die Federelemente gebildeten, gegenüber der Gehäuseöffnung im Durchmesser vergrößerten, seitlich überstehenden Anlageflächen an der Gehäusewand innenseite anliegt, und daß die Tastenkappe an der Oberseite stufenförmig abgesetzt und im mittleren, erhöhten Teil mit einer Ausnehmung entsprechend der Kennzeichnung mit einer Ziffer oder einem Symbol versehen ist, die bzw. das aus einem lichtdurchlässigen Kunststoff teil bestehen und über ein den Innenraum des lichtundurchlässigen halbschalenförmigen Kunststoffteils ausfüllendes lichtdurchlässigen Kunststoffteil mit dem an diesem lichtdurchlässigen Kunststoffteil angebrachten Zapfen lichtleitend verbunden sind.This object is achieved according to the invention in such a way that the key cap, which can be inserted into the housing opening with lateral play, has a downwardly open, half-shell-shaped plastic part of rectangular shape and has a correspondingly configured pin on at least one side running parallel to the housing opening at an acute angle inclined towards the housing, the half-shell-shaped plastic part laterally projecting, prestressed spring element, which is supported on a stop surface in the housing and with the upper side of the contact surfaces formed by the spring elements, enlarged in diameter compared to the housing opening, is laterally protruding on the housing wall, and that the key cap is stepped at the top and is provided in the middle, raised part with a recess corresponding to the identification with a number or a symbol, or the part made of a translucent plastic exist and are connected in a light-conducting manner via a translucent plastic part filling the interior of the opaque half-shell-shaped plastic part to the peg attached to this translucent plastic part.

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 Ausführungsbeispiels näher erläutert.The invention is explained in more detail below on the basis of an exemplary embodiment shown in the drawing.

Es zeigen

  • Fig. 1 bis 4 eine Tastenkappe in zwei Seitenansichten, einer Draufsicht und einem Längsschnitt.
  • Fig. 5 eine Tastenkappe im eingebauten Zustand.
Show it
  • 1 to 4 a key cap in two side views, a top view and a longitudinal section.
  • Fig. 5 shows a key cap in the installed state.

Die Tastenkappe 1 weist ein nach unten offenes, halbschalenförmiges Kunststoffteil rechteckförmiger Gestalt auf, an dessen Längs- und Querseiten Federelemente 2 angebracht, vorzugsweise angespritzt 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 mit einer Ausnehmung entsprechend der Ziffer oder dem Symbol versehen ist, mit der die Tastenkappe 1 gekennzeichnet werden soll. Die Ziffer bzw. das Symbol bestehen aus einem lichtdurchlässigen Kunststoff. Sie sind über ein Kunststoffteil 4, das den Innenraum der aus einem lichtundurchlässigen Kunststoff bestehenden Tastenkappe mit festem Sitz ausfüllt, mit einem an dem Kunststoffteil 4 angebrachten Zapfen 5 lichtleitend verbunden. Hierfür wird ein lichtsammeInder, fluoreszierend eingefärbter Kunststoff verwendet, der die vorteilhaften Eigenschaften in sich vereinigt, daß er sowohl bei Tag gut lesbar vie auch bei Nacht ausreichend von innen beleuchtbar und somit lesbar ist.The keycap 1 has 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 molded on. 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 being provided with a recess corresponding to the number or symbol with which the key cap 1 is to be identified. The number or symbol consists of a translucent plastic. They are connected in a light-conducting manner to a pin 5 attached to the plastic part 4 via a plastic part 4, which fills the interior of the key cap made of an opaque plastic with a firm fit. For this purpose, a light-collecting, fluorescent colored plastic is used, which combines the advantageous properties that it is easily legible both during the day and sufficiently illuminated from inside and thus legible at night.

Fig. 5 zeigt die vorstehend beschriebene Tastenkappe 1 im eingebauten Zustand. Mehrere Tastenkappen sind zweckmäßig in einem Raster 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 expediently arranged in a grid and provided with the symbols corresponding to their function. The associated buttons 8 are mounted 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 is the Key cap 1 on the inside 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 is used 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 Federelemente 2 ist auch gewährleistet, daß die Tastenkappen nicht im Gehäuse klappern und ein beim Fahren unerwünschtes Geräusch entsteht. Für die Montage ergibt sich durch die integrierten Federelemente eine wesentliche Vereinfachung. Der Wegfall einer separaten Feder bringt neben einer Vereinfachung beim Aufbau auch eine Kostenreduzierung.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. These spring elements 2, which are made of a correspondingly elastic plastic, also ensure that the keycaps do not rattle in the housing and an undesirable noise occurs when driving. The integrated spring elements simplify assembly considerably. The elimination of a separate spring not only simplifies assembly, but also reduces costs.

Claims (7)

1. A key cap for a keyboard arranged in electrical communications technology apparatus, in particular the operating unit of a telephone installation, which key cap is inserted in an opening in the housing of the apparatus (6) and can be pressed through a pin (5) against a key (8) arranged in the interior of the housing in order to operate the key, and has prestressed, laterally arranged spring elements (2) which are extended longitudinally and abut against a stop face inside the housing, characterised in that the key cap (1 which can be inserted in the opening in the housing with lateral play, and which has a downwardly opening half-shell-shaped synthetic resin part (3) of rectangular shape, with a correspondingly shaped pin (5), has at at least one side running parallel to the opening in the housing, a prestressed spring element (2) which is inclined towards the housing (6) at an acute angle and projects beyond the half-shell-shaped synthetic resin part (3) at the side, and which spring is pressed against a stop face in the housing (6) and abuts against the inside of the housing wall, with the upper side of the stop faces formed by the spring elements (2), which stop faces have an increased diameter relative to the housing opening and project laterally ; and that the key cap (1) is stepped at its upper face and in its central raised part is provided with a recess with a figure or symbol corresponding to the marking formed by a transparent synthetic resin part (4) connected in light-conducting manner through a transparent synthetic resin part (4) which fills the interior space of the opaque half-shell-shaped synthetic resin part (3), with the pin (5) mounted on this transparent synthetic resin part (4).
2. A key cap as claimed in Claim 1, characterised in that the spring elements (2) are injection- moulded.
3. A key cap as claimed in claimed in Claim 1 or 2, characterised in that the spring elements (2) consist of an elastic synthetic resin material.
4. A key cap as claimed in one of Claims 1 to 3, characterised in that the transparent synthetic resin part (4) is made of a light-collecting, fluorescent, coloured synthetic resin material.
5. A key cap as claimed in one of Claims 1 to 4, characterised in that the symbols are connected in light-conducting manner with the pin (5) and the latter plunges into the bore of a light-conductor (7).
6. A key cap as claimed in Claim 5, characterised in that the light-conductor (7) forms the stop face for the spring elements (2).
7. A key cap as claimed in one of the preceding Claims, characterised in that the keys (8) are mounted on a printed circuit board (10), for example, by soldering.
EP84115189A 1983-12-22 1984-12-12 Key cap for a keyboard mounted in a housing Expired EP0148437B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84115189T ATE32802T1 (en) 1983-12-22 1984-12-12 KEYCAP FOR AN ENCLOSED KEYBOARD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833346485 DE3346485A1 (en) 1983-12-22 1983-12-22 KEY COVER FOR A KEYBOARD ARRANGED IN A HOUSING
DE3346485 1983-12-22

Publications (2)

Publication Number Publication Date
EP0148437A1 EP0148437A1 (en) 1985-07-17
EP0148437B1 true EP0148437B1 (en) 1988-03-02

Family

ID=6217749

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84115189A Expired EP0148437B1 (en) 1983-12-22 1984-12-12 Key cap for a keyboard mounted in a housing

Country Status (7)

Country Link
EP (1) EP0148437B1 (en)
AT (1) ATE32802T1 (en)
DE (2) DE3346485A1 (en)
DK (1) DK160381C (en)
ES (1) ES295022Y (en)
FI (1) FI80360C (en)
NO (1) NO165317C (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3512386A1 (en) * 1985-04-04 1986-10-09 Siemens AG, 1000 Berlin und 8000 München KEY COVER FOR A KEYBOARD ARRANGED IN A HOUSING
EP0231007A3 (en) * 1986-01-31 1989-11-15 Siemens Aktiengesellschaft Push button
JP2768030B2 (en) * 1991-02-21 1998-06-25 日本電気株式会社 Flat keyboard switch
FR2683183B1 (en) * 1991-10-31 1995-02-03 Sextant Avionique PROCESS FOR FORMING A PAINTED PATTERN ON AN OBJECT MADE OF NON-ADHERENT MATERIAL.
FI110044B (en) 2000-06-30 2002-11-15 Nokia Corp Structure of the casing part of an electronic device
JP2002093270A (en) * 2000-09-19 2002-03-29 Nec Corp Structure of illuminating part
JP2007141662A (en) * 2005-11-18 2007-06-07 Polymatech Co Ltd Key sheet
US9346201B2 (en) * 2014-09-18 2016-05-24 Ford Global Technologies, Llc Plastic part with reduced read-through

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US3144643A (en) * 1960-12-10 1964-08-11 Gasaccumulator Svenska Ab Push-button illuminating device
DE1665975B2 (en) * 1967-06-23 1972-05-04 SWF-Spezialfabrik für Autozubehör Gustav Rau GmbH, 7120 Bietigheim ELECTRIC SWITCH WITH LIGHTING, IN PARTICULAR FOR VEHICLES
US3982081A (en) * 1974-09-04 1976-09-21 Amp Incorporated Keyboard assembly with overlapped flexible printed circuit cable switch
JPS5168726A (en) * 1974-12-12 1976-06-14 Hosiden Electronics Co
FR2395546A2 (en) * 1977-06-22 1979-01-19 Serras Paulet Edouard ALPHANUMERIC KEYPAD WITH PRESSURE KEYS FOR ELECTRICAL OR ELECTRONIC MACHINE
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Also Published As

Publication number Publication date
FI80360B (en) 1990-01-31
NO165317B (en) 1990-10-15
DE3346485A1 (en) 1985-07-04
ES295022Y (en) 1987-07-16
FI80360C (en) 1990-05-10
DK160381C (en) 1991-08-12
NO845074L (en) 1985-06-24
DK613484D0 (en) 1984-12-20
ATE32802T1 (en) 1988-03-15
NO165317C (en) 1991-01-23
DK160381B (en) 1991-03-04
FI845093L (en) 1985-06-23
DK613484A (en) 1985-06-23
EP0148437A1 (en) 1985-07-17
ES295022U (en) 1986-11-01
FI845093A0 (en) 1984-12-21
DE3469636D1 (en) 1988-04-07

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