EP0123207A1 - Pushbutton switch arrangement - Google Patents

Pushbutton switch arrangement Download PDF

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Publication number
EP0123207A1
EP0123207A1 EP84104030A EP84104030A EP0123207A1 EP 0123207 A1 EP0123207 A1 EP 0123207A1 EP 84104030 A EP84104030 A EP 84104030A EP 84104030 A EP84104030 A EP 84104030A EP 0123207 A1 EP0123207 A1 EP 0123207A1
Authority
EP
European Patent Office
Prior art keywords
switch
switching cam
switch arrangement
dome
domes
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
EP84104030A
Other languages
German (de)
French (fr)
Other versions
EP0123207B1 (en
Inventor
Werner Willhaus
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.)
Alcatel Lucent NV
Original Assignee
Alcatel SEL AG
Standard Elektrik Lorenz AG
International Standard Electric Corp
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 Alcatel SEL AG, Standard Elektrik Lorenz AG, International Standard Electric Corp filed Critical Alcatel SEL AG
Publication of EP0123207A1 publication Critical patent/EP0123207A1/en
Application granted granted Critical
Publication of EP0123207B1 publication Critical patent/EP0123207B1/en
Expired legal-status Critical Current

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Classifications

    • 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
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/28—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H27/00—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings
    • H01H27/06—Key inserted and then turned to effect operation of the switch

Definitions

  • the invention relates to a key switch arrangement for telephones according to the preamble of claim 1.
  • Such push button switch arrangements with a printed circuit as a carrier of the fixed contacts and a switch mat as a carrier of the movable contacts are already known, e.g. from DE-OS 30 33 134.
  • the switch mat is made of rubber or a rubber-elastic plastic and is provided with dome-like curvatures which are assigned to the buttons. Inside the arch is the movable contact, which is brought into contact with the corresponding fixed contact on the printed circuit when a button is pressed.
  • This lock switch is a separate construction Group consisting of a cylinder with a removable key, with the cylinder being connected to a cam that rotates around the cylinder axis and interacts with contact springs.
  • the parts are housed in a cylindrical plastic housing, which can be screwed onto the chassis of the telephone set or joined in a form-fitting manner (DE-GM 75 28 008).
  • the invention has for its object to integrate the lock switch in the key switch arrangement. This problem is solved by the measures specified in the characterizing part of claim 1. Further training can be found in the subclaims.
  • the advantage of the design according to the invention is that a separate lock switch assembly is superfluous. The space required for this and for the wiring can be used for other purposes. Construction and assembly of the telephone set are simpler and cheaper than with the conventional construction. Retrofitting is also easy to carry out since no soldering work is necessary. The wiring is already specified in the printed circuit.
  • a switch mat 5 with dome-like arches 6 is arranged above a printed circuit 4 with the fixed contacts and conductor tracks 8.
  • the printed circuit 4 is formed by a printed circuit board or a printed film.
  • the switch mat 5 consists of an elastic, rubber-like plastic.
  • the movable contacts 7 are attached, which cooperate with the fixed contacts 8 of the printed circuit 4.
  • the domes are actuated by push buttons, which are above each of them, but are not shown in the figures.
  • a lock switch 1 is arranged between the domes 6, the lock cylinder 2 of which has a rotatable switching cam 3 at the lower end.
  • the locking cylinder and its switching cam are rotated by means of a key (not shown).
  • the switching cam 3 is in a neutral center position between two domes 6 of the switching mat 5. As the double arrow indicates, it can be rotated about its axis on both sides.
  • Fig. 2 it is turned to the left and has depressed the left dome 6 so that its contact 7 comes into contact with the contact 8 of the printed circuit.
  • the domes 6 assigned to the key switch are provided on the switch mat in addition to the key-operated domes.
  • domes can easily be attached around the closing cylinder so that they can be operated with its switching cam 3. If the lock switch 1 is not required at all, the lock cylinder is simply omitted and the opening in the control panel is closed by a blind plug (not shown). Reversed is replaced by a lock switch when retrofitting the blind plug.
  • the lock shadow 1 is mounted coaxially over a dome 6 of the switching mat 5. So only one cathedral can be operated.
  • the switching cam 3 of the locking cylinder 2 consists here of a beveling of the lower end of the rotatable part of the lock switch. This cam 3 is opposed by the uniformly beveled end of a coaxially arranged pressure piece 9, which is only axially movable. If the cam 3 is now rotated from the position shown in FIG. 3 to that shown in FIG. 4, the pressure piece 9 is moved downward against the dome 6 in accordance with the incline of the cam and pressure piece, and this is pressed in so that contacts 7 and 8 touch. When the lock switch 1 is turned back, the pressure piece 9 returns to its starting position.

Landscapes

  • Push-Button Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

Die Erfindung betrifft eine Tastschalteranordnung für Fernsprechapparate mit integriertem Schaltschloß (1). Durch einen drehbaren Schaltnocken (3) des Schalschlosses (1) kann wahlweise einer von mehreren Domen (6) einer gummiartigen Schaltmatte (5) der Tastschalteranordnung betätigt werden, wodurch bestimmte Betriebszustände geschaltet werden.The invention relates to a push-button arrangement for telephone sets with an integrated switch lock (1). One of several domes (6) of a rubber-like switch mat (5) of the push-button switch arrangement can optionally be actuated by means of a rotatable switching cam (3) of the switch lock (1), as a result of which certain operating states are switched.

Description

Die Erfindung betrifft eine Tastschalteranordnung für Fernsprechapparate nach dem Oberbegriff des Anspruchs 1.The invention relates to a key switch arrangement for telephones according to the preamble of claim 1.

Derartige Tastschalteranordnungen mit einer gedruckten Schaltung als Träger der festen Kontakte und einer Schaltmatte als Träger der beweglichen Kontakte sind bereits bekannt, z.B. aus der DE-OS 30 33 134. Die Schaltmatte besteht aus Gummi oder einem gummielastischen Kunststoff und ist mit domartigen Wölbungen versehen, die den Tasten zugeordnet sind. Im Innern der Wölbung befindet sich der bewegliche Kontakt, der bei Tastendruck mit dem entsprechenden festen Kontakt auf der gedruckten Schaltung in Berührung gebracht wird.Such push button switch arrangements with a printed circuit as a carrier of the fixed contacts and a switch mat as a carrier of the movable contacts are already known, e.g. from DE-OS 30 33 134. The switch mat is made of rubber or a rubber-elastic plastic and is provided with dome-like curvatures which are assigned to the buttons. Inside the arch is the movable contact, which is brought into contact with the corresponding fixed contact on the printed circuit when a button is pressed.

Bei modernen Fernsprechapparaten werden solche Tastschalteranordnungen mit SchaLtmatten im zunehmenden Maße als Tastwahlblock eingesetzt. Bei Reihen- und VorzimmeranLagen ist außerdem zum Schalten von Betriebszuständen, wie z.B. zum Programmieren von LeistungsmerkmaLen oder Sperren der Externleitungsberechtigungen, ein zusätzlicher Schloßschalter erforderlich. Dieser Schloßschalter ist eine separate Baugruppe, die aus einem SchLießzyLinder mit abziehbarem SchLüsseL besteht, wobei mit dem SchLießzyLinder ein um die ZyLinderachse rotierbarer Nocken, der mit Kontaktfedern zusammenwirkt, verbunden ist. Die TeiLe sind in einem zylindrischen Kunststoffgehäuse untergebracht, das am Chassis des Fernsprechapparates angeschraubt oder formschlüssig gefügt werden kann (DE-GM 75 28 008).In modern telephone sets, such key switch arrangements with switch mats are increasingly being used as a touch dial block. In the case of row and anteroom systems, an additional lock switch is also required to switch operating states, such as programming performance features or blocking external line authorizations. This lock switch is a separate construction Group consisting of a cylinder with a removable key, with the cylinder being connected to a cam that rotates around the cylinder axis and interacts with contact springs. The parts are housed in a cylindrical plastic housing, which can be screwed onto the chassis of the telephone set or joined in a form-fitting manner (DE-GM 75 28 008).

Der Erfindung Liegt die Aufgabe zugrunde, den Schloßschalter in die TastschaLteranordnung zu integrieren. GeLöst wird diese Aufgabe durch die im Kennzeichen des Anspruchs 1 angegebenen Maßnahmen. Weiterbildungen sind den Unteransprüchen zu entnehmen. Durch die erfindungsgemäße Gestaltung wird der VorteiL erreicht, daß eine gesonderte Schloßschalter-Baugruppe überflüssig ist. Der dafür und für die Verdrahtung benötigte Raum kann anderweitig genutzt werden. Aufbau und Montage des Fernsprechapparates sind einfacher und billiger als bei der herkömmlichen Bauweise. Auch das Nachrüsten ist Leicht durchführbar, da keine Lötarbeiten nötig sind. Die Verdrahtung ist in der gedruckten SchaLtung bereits vorgegeben.The invention has for its object to integrate the lock switch in the key switch arrangement. This problem is solved by the measures specified in the characterizing part of claim 1. Further training can be found in the subclaims. The advantage of the design according to the invention is that a separate lock switch assembly is superfluous. The space required for this and for the wiring can be used for other purposes. Construction and assembly of the telephone set are simpler and cheaper than with the conventional construction. Retrofitting is also easy to carry out since no soldering work is necessary. The wiring is already specified in the printed circuit.

Die Erfindung wird nachstehend an Ausführungsbeispielen näher beschrieben. In der Zeichnung zeigt:

  • Fig. 1 einen erfindungsgemäßen SchLoßschaLter in neutraler SteLLung zwischen zwei Schaltmatten-Domen, im Querschnitt;
  • Fig. 2 den gleichen Schloßschalter wie in Fig. 1, jedoch in BetätigungssteLLung über einem Dom der SchaLtmatte;
  • Fig. 3 eine andere Ausführung des Schloßschalters in unbetätigter SteLLung über einem Dom der Schaltmatte und
  • Fig. 4 den Schloßschalter nach Fig. 3 in betätigter Stellung.
The invention is described below using exemplary embodiments. The drawing shows:
  • 1 shows a lock switch according to the invention in a neutral position between two switch mat domes, in cross section;
  • FIG. 2 shows the same lock switch as in FIG. 1, but in the actuating position over a dome of the switch mat;
  • Fig. 3 shows another version of the lock switch in unactuated position above a dome of the switch mat and
  • Fig. 4 shows the lock switch of Fig. 3 in the actuated position.

Bei der Tastschalteranordnung nach den Fig. 1 und 2 ist über einer gedruckten Schaltung 4 mit den festen Kontakten und Leiterbahnen 8 eine Schaltmatte 5 mit domartigen Wölbungen 6 angeordnet. Die gedruckte Schaltung 4 wird von einer LeiterpLatte oder einer LeiterfoLie gebildet. Die Schaltmatte 5 besteht aus einem elastischen, gummiartigen Kunststoff.1 and 2, a switch mat 5 with dome-like arches 6 is arranged above a printed circuit 4 with the fixed contacts and conductor tracks 8. The printed circuit 4 is formed by a printed circuit board or a printed film. The switch mat 5 consists of an elastic, rubber-like plastic.

Im Innern der Dome 6 der Schaltmatte 5 sind die beweglichen Kontakte 7 angebracht, die mit den festen Kontakten 8 der gedruckten SchaLtung 4 zusammenwirken. Bei Verwendung der Anordnung in einem Tastwahlblock für Fernsprechapparate werden die Dome durch Druckknöpfe betätigt, die jeweils über ihnen stehen, in den Figuren aber nicht dargestellt sind.In the interior of the dome 6 of the switch mat 5, the movable contacts 7 are attached, which cooperate with the fixed contacts 8 of the printed circuit 4. When using the arrangement in a keypad for telephone sets, the domes are actuated by push buttons, which are above each of them, but are not shown in the figures.

Zwischen den Domen 6 ist ein Schloßschalter 1 angeordnet, dessen Schließzylinder 2 am unteren Ende einen drehbaren Schaltnocken 3 besitzt. Die Drehung des Schließzylinders und seines Schaltnockens erfolgt, wie üblich, mittels eines (nicht gezeigten) Schlüssels. In Fig. 1 steht der Schaltnocken 3 in einer neutralen MitteLsteLLung zwischen zwei Domen 6 der SchaLtmatte 5. Wie der DoppeLpfeiL andeutet, kann er nach beiden Seiten um seine Achse gedreht werden. In Fig. 2 ist er nach links gedreht und hat dabei den linken Dom 6 niedergedrückt, so daß dessen Kontakt 7 mit dem Kontakt 8 der gedruckten SchaLtung in Berührung kommt. Die dem Schaltschloß zugeordneten Dome 6 sind zusätzlich zu den tastenbetätigten Domen auf der Schaltmatte vorgesehen. In der RegeL reichen zwei, doch können ohne weiteres auch vier Dome so um den SchLießzyLinder angebracht sein, daß sie mit seinem SchaLtnocken 3 betätigbar sind. Wenn der Schloßschalter 1 überhaupt nicht benötigt wird, so wird LedigLich der Schließzylinder weggelassen und die öffnung in der BedienpLatte durch einen BLindstopfen verschlossen (nicht dargestellt). Umgekehntwird beim Nachrüsten der BLindstopfen durch einen Schloßschalter ersetzt.A lock switch 1 is arranged between the domes 6, the lock cylinder 2 of which has a rotatable switching cam 3 at the lower end. As usual, the locking cylinder and its switching cam are rotated by means of a key (not shown). In Fig. 1, the switching cam 3 is in a neutral center position between two domes 6 of the switching mat 5. As the double arrow indicates, it can be rotated about its axis on both sides. In Fig. 2 it is turned to the left and has depressed the left dome 6 so that its contact 7 comes into contact with the contact 8 of the printed circuit. The domes 6 assigned to the key switch are provided on the switch mat in addition to the key-operated domes. Usually two are sufficient, but four domes can easily be attached around the closing cylinder so that they can be operated with its switching cam 3. If the lock switch 1 is not required at all, the lock cylinder is simply omitted and the opening in the control panel is closed by a blind plug (not shown). Reversed is replaced by a lock switch when retrofitting the blind plug.

Bei der Ausführung nach den Fig. 3 und 4 ist im Gegensatz zur zuvor beschriebenen Ausführung der Schloßschatter 1 koaxial über einem Dom 6 der SchaLtmatte 5 angebracht. Es kann also nur ein Dom betätigt werden.In the embodiment according to FIGS. 3 and 4, in contrast to the embodiment described above, the lock shadow 1 is mounted coaxially over a dome 6 of the switching mat 5. So only one cathedral can be operated.

Der SchaLtnocken 3 des SchLießzyLinders 2 besteht hier in einer Abschrägung des unteren Endes des drehbaren Teiles des Schloßschalters. Diesem Nocken 3 steht das gleichförmig angeschrägte Ende eines koaxial angeordneten Druckstückes 9 gegenüber, das nur axial bewegbar gelagert ist. Wird nun der Nocken 3 von der in Fig. 3 gezeigten SteLLung in die aus Fig. 4 ersichtliche gedreht, so wird das Druckstück 9 gemäß der Steigung der Schrägen an Nocken und Druckstück nach unten gegen den Dom 6 bewegt und dieser dadurch eingedrückt, so daß sich die Kontakte 7 und 8 berühren. Beim Zurückdrehen des Schloßschalters 1 geht das Druckstück 9 in seine AusgangsLage zurück.The switching cam 3 of the locking cylinder 2 consists here of a beveling of the lower end of the rotatable part of the lock switch. This cam 3 is opposed by the uniformly beveled end of a coaxially arranged pressure piece 9, which is only axially movable. If the cam 3 is now rotated from the position shown in FIG. 3 to that shown in FIG. 4, the pressure piece 9 is moved downward against the dome 6 in accordance with the incline of the cam and pressure piece, and this is pressed in so that contacts 7 and 8 touch. When the lock switch 1 is turned back, the pressure piece 9 returns to its starting position.

Claims (4)

1. Tastschalteranordnung für Fernsprechapparate und dergleichen mit einer mit Kontakten und Leiterbahnen versehenen gedruckten Schaltung und einer darüber Liegenden Schaltmatte aus elastischem Material, die den Tasten zugeordnete Dome aufweist, in deren HohLräumen die beweglichen Kontakte untergebracht sind, dadurch gekennzeichnet, daß ein Schloßschalter (1), dessen Schließzylinder (2) einen drehbaren SchaLtnocken (3) aufweist, so über der Schaltmatte (5) angeordnet ist, daß durch Drehen des SchaLtnockens ein Dom (6) betätigbar ist.1. Key switch arrangement for telephones and the like with a printed circuit provided with contacts and conductor tracks and an overlying switching mat made of elastic material, which has keys assigned domes, in the cavities of which the movable contacts are accommodated, characterized in that a lock switch (1) , whose locking cylinder (2) has a rotatable switching cam (3), is arranged above the switching mat (5) in such a way that a dome (6) can be actuated by turning the switching cam. 2. Tastschalteranordnung nach Anspruch 1, dadurch gekennzeichnet, daß der SchaLtnocken (3) vom abgeschrägten Ende des Schließzylinders (2) gebildet wird und auf das gleichförmig schräge Ende eines koaxial angeordneten, axial verschiebbaren Druckstückes (9) wirkt, dessen anderes Ende den Dom (6) beätigt. 2. Key switch arrangement according to claim 1, characterized in that the switching cam (3) from the bevelled end of the locking cylinder (2) is formed and acts on the uniformly inclined end of a coaxially arranged, axially displaceable pressure piece (9), the other end of which the dome ( 6) confirmed . 3. Tastschalteranordnung nach Anspruch 1, dadurch gekennzeichnet, daß der Schaltnocken (3) von einem flügelartigen Ansatz des Schließzylinders (2) gebildet wird, der auf den Dom (6) einwirkt.3. Key switch arrangement according to claim 1, characterized in that the switching cam (3) is formed by a wing-like extension of the locking cylinder (2) which acts on the dome (6). 4. TastschaLteranordnung nach Anspruch 3, dadurch gekenn zeichnet, daß der Schtoßschalter (1) so zwischen den Domen (6) angeordnet ist, daß mit dem SchaLtnocken (3) j weils einer von wenigstens zwei benachbarten Domen betätigbar ist.4. switch arrangement according to claim 3, characterized in that the switch (1) is arranged between the domes (6) that with the switching cam (3) j because one of at least two adjacent domes can be actuated.
EP84104030A 1983-04-23 1984-04-11 Pushbutton switch arrangement Expired EP0123207B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3314772 1983-04-23
DE19833314772 DE3314772A1 (en) 1983-04-23 1983-04-23 KEY SWITCH ARRANGEMENT

Publications (2)

Publication Number Publication Date
EP0123207A1 true EP0123207A1 (en) 1984-10-31
EP0123207B1 EP0123207B1 (en) 1986-08-06

Family

ID=6197185

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84104030A Expired EP0123207B1 (en) 1983-04-23 1984-04-11 Pushbutton switch arrangement

Country Status (6)

Country Link
US (1) US4536628A (en)
EP (1) EP0123207B1 (en)
JP (1) JPS6035425A (en)
KR (1) KR920007746B1 (en)
DE (2) DE3314772A1 (en)
ES (1) ES278969Y (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2618592A1 (en) * 1987-07-24 1989-01-27 Triumph Adler Ag KEY SWITCH FOR ELECTRIC OR ELECTRONIC APPLIANCES
AU597598B2 (en) * 1985-10-17 1990-06-07 Bartlem Pty Ltd Improvements to switch assemblies

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH079460Y2 (en) * 1987-10-01 1995-03-06 株式会社ト−キン Block filter for power line communication equipment
US4918264A (en) * 1987-12-26 1990-04-17 Asahi Kogaku Kogyo K.K. Actuating mechanism and multiposition rubber or membrane switch device
US5089677A (en) * 1987-12-26 1992-02-18 Asahi Kogaku Kogyo K.K. Switching dial and finger rest
US4970512A (en) * 1989-04-03 1990-11-13 Wood Lawson A Printed circuit rotary switch with decoder
DE4126042A1 (en) * 1991-08-06 1993-02-18 Ruf Kg Wilhelm Electrical rotary selector switch for keyboard of e.g. pocket calculator, remote controller - has bridging contact formed on flexible mat that is locally deflected by roller to bridge circuit board contacts
US6148183A (en) * 1997-12-31 2000-11-14 Motorola, Inc. Switch assembly for an electronic device
DE10151053B4 (en) * 2001-10-16 2012-05-10 Leopold Kostal Gmbh & Co. Kg circuitry
US6797907B1 (en) 2003-11-18 2004-09-28 Emerson Electric Co. Rotary switch assembly
US8525055B2 (en) * 2007-05-08 2013-09-03 Bs&B Safety Systems Pressure response membrane

Citations (6)

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Publication number Priority date Publication date Assignee Title
FR818829A (en) * 1936-06-10 1937-10-04 Saintagne Key switch
DE2007323A1 (en) * 1969-02-18 1970-09-10 Joseph Lucas (Industries) Ltd., Birmingham (Grossbritannien) Electric switch
DE1640578A1 (en) * 1967-12-30 1970-12-17 Industriebedarf Handelsgmbh Key operated safety switch
US3651298A (en) * 1970-08-27 1972-03-21 Paul H Omohundro Weather and shock proof switch casing with insertable key switch operating member
DE3104103A1 (en) * 1981-02-06 1982-08-19 Fa. Albrecht Jung, 5885 Schalksmühle Waterproof, electrical installation apparatus having a lock cylinder
US4396812A (en) * 1981-12-02 1983-08-02 Gould, Inc. Electric, key-controlled switch lock

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US1712981A (en) * 1925-12-05 1929-05-14 Continuous Train Control Corp Railway-train-control system
US3243528A (en) * 1964-05-28 1966-03-29 Gen Electric Dual action electrical switch
JPS52149375A (en) * 1976-06-07 1977-12-12 Suwa Seikosha Kk Keyboard
US4403315A (en) * 1979-07-23 1983-09-06 Citizen Watch Co., Ltd. Electronic timepiece assembly
JPS5628543U (en) * 1979-08-07 1981-03-17

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR818829A (en) * 1936-06-10 1937-10-04 Saintagne Key switch
DE1640578A1 (en) * 1967-12-30 1970-12-17 Industriebedarf Handelsgmbh Key operated safety switch
DE2007323A1 (en) * 1969-02-18 1970-09-10 Joseph Lucas (Industries) Ltd., Birmingham (Grossbritannien) Electric switch
US3651298A (en) * 1970-08-27 1972-03-21 Paul H Omohundro Weather and shock proof switch casing with insertable key switch operating member
DE3104103A1 (en) * 1981-02-06 1982-08-19 Fa. Albrecht Jung, 5885 Schalksmühle Waterproof, electrical installation apparatus having a lock cylinder
US4396812A (en) * 1981-12-02 1983-08-02 Gould, Inc. Electric, key-controlled switch lock

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU597598B2 (en) * 1985-10-17 1990-06-07 Bartlem Pty Ltd Improvements to switch assemblies
FR2618592A1 (en) * 1987-07-24 1989-01-27 Triumph Adler Ag KEY SWITCH FOR ELECTRIC OR ELECTRONIC APPLIANCES

Also Published As

Publication number Publication date
KR920007746B1 (en) 1992-09-16
EP0123207B1 (en) 1986-08-06
KR840008522A (en) 1984-12-15
DE3460423D1 (en) 1986-09-11
ES278969Y (en) 1987-11-16
JPS6035425A (en) 1985-02-23
US4536628A (en) 1985-08-20
ES278969U (en) 1986-05-01
DE3314772A1 (en) 1984-10-25

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