DE3344896A1 - Keypad for telephone stations - Google Patents

Keypad for telephone stations

Info

Publication number
DE3344896A1
DE3344896A1 DE19833344896 DE3344896A DE3344896A1 DE 3344896 A1 DE3344896 A1 DE 3344896A1 DE 19833344896 DE19833344896 DE 19833344896 DE 3344896 A DE3344896 A DE 3344896A DE 3344896 A1 DE3344896 A1 DE 3344896A1
Authority
DE
Germany
Prior art keywords
keypad
key buttons
keyboard
pressure plate
rubber mat
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.)
Withdrawn
Application number
DE19833344896
Other languages
German (de)
Inventor
Reinhold 8027 Neuried Heiß
Rudolf Dr. 8000 München Wächtler
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 DE19833344896 priority Critical patent/DE3344896A1/en
Priority to DE19838335619 priority patent/DE8335619U1/en
Publication of DE3344896A1 publication Critical patent/DE3344896A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/024—Properties of the substrate
    • H01H2209/026—Properties of the substrate metallic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/034—Bezel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2231/00—Applications
    • H01H2231/022—Telephone handset
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/004—High frequency adaptation or shielding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/018—Ground conductor

Landscapes

  • Push-Button Switches (AREA)
  • Telephone Set Structure (AREA)

Abstract

Keypad with a plurality of key buttons (2) disposed in a housing (1) which act, via lifting bellows (4) of a rubber mat (5) on a contact foil (6). In a keypad of this type, electromagnetic interference is intended to be prevented during dialling operation by simple means. To this end, a metal pressure plate (7) is disposed on the side of the contact foil (6) which faces away from the key buttons (2). This ensures not only that the keypad is screened from electromagnetic interference but also that the key forces are effectively absorbed. <IMAGE>

Description

Tastatur für FernsprechstationenKeypad for telephone stations

Die vorliegende Erfindung beinhaltet eine Tastatur für Fernsprechstationen mit mehreren in einem Tastaturgehäuse geführten und gehalterten Tastenknöpfen, die mit Hubbälgen einer Gummimatte auf eine Kontaktfolie einwirken.The present invention includes a keypad for telephone stations with several key buttons guided and held in a keyboard housing, the act on a contact foil with the lifting bellows of a rubber mat.

Derartige Tastaturen sind in zahlreichen Ausführungsformen bekannt. Es hat sich bei den bekannten Ausführungsformen in manchen Fällen als nachteilig erwiesen, daß durch von außen auf die Station einwirkende elektromagnetische Einflüsse Störungen im Wählbetrieb hervorgerufen werden. Zur Ausschaltung dieses Effektes ist es bereits bekannt, Abschirmfilter im Siebdruckverfahren auf die den Tasten abgewandten Seite der Kontaktfolie aufzubringen.Such keyboards are known in numerous embodiments. In the known embodiments, it has proven to be disadvantageous in some cases proved that due to electromagnetic influences acting on the station from outside Disturbances are caused in dialing mode. To switch off this effect it is already known to screen filters on the keys to apply facing away from the contact foil.

Diese Maßnahme hat sich jedoch nicht bei allen Frequenzen als wirksam erwiesen.However, this measure has not been found to be effective at all frequencies proven.

Aufgabe der vorliegenden Erfindung ist es daher, mit einfachen Mitteln eine Abschirmung zu realisieren, durch die die genannten Störungen ausgeschaltet werden können. Gemäß der Erfindung wird dies dadurch erreicht, daß im Bereich der den Tastenknöpfen abgewandten Seite der Kontaktfolie eine metallische Druckplatte angeordnet ist, wobei an der Gummimatte warzenförmige Erhebungen vorgesehen sind.The object of the present invention is therefore to use simple means to realize a shield by which the mentioned disturbances are switched off can be. According to the invention this is achieved in that in the area of the side of the contact foil facing away from the key buttons is a metallic pressure plate is arranged, wherein wart-shaped elevations are provided on the rubber mat.

Da sich die elektromagnetischen Einflüsse in erster Linie auf die sehr hochohmigen und räumlich über eine große Fläche verteilten Matrixkoppelpunkte der Tastatur auswirken, kann in einfacher Weise durch Vorsehen einer metallischen Druckplatte eine großflächige Abschirmung erreicht werden.Since the electromagnetic influences primarily affect the very high resistance matrix crosspoints spatially distributed over a large area the keyboard can be affected in a simple manner by providing a metallic printing plate extensive shielding can be achieved.

Eine derartige Metallplatte hat weiterhin den Vorteil, daß sie für die Aufnahme sowie Weiterleitung der Tastkräfte bestens geeignet ist.Such a metal plate has the further advantage that it is for the reception and transmission of the tactile forces is ideally suited.

Heutige zum Einsatz gelangende Fernsprechstationen sind relativ leicht gebaut, so daß oft der Fall eintritt, daß sich die Station beim Abnehmen des Hörers auf den Benutzer zubewegt. Das Gewicht der in die Fernsprechstation eingebrachten metallischen Druckplatte trägt dazu bei, daß dieser unerwünschte Effekt nicht mehr so häufig auftritt. Durch Vorsehen von warzenförmigen Erhebungen, die beispielsweise auf der den Tastenknöpfen zugewandten Seite der Gummimatte angeordnet sein können, läßt sich in einfacher Weise der Anpreßdruck zwischen der Kontaktfolie und der Druckplatte erhöhen.Telephone stations used today are relatively light built, so that it often happens that the station is when the receiver is lifted moved towards the user. The weight of those brought into the telephone station metallic pressure plate contributes to the fact that this undesirable effect no longer occurs occurs so often. By providing wart-shaped elevations, for example can be arranged on the side of the rubber mat facing the key buttons, the contact pressure between the contact foil and the pressure plate can be easily adjusted raise.

Die Erfindung soll im folgenden anhand eines Ausführungsbeispiels näher erläutert werden.The invention is intended in the following on the basis of an exemplary embodiment are explained in more detail.

Die Abbildung zeigt einen Teil einer Tastatur für eine Fernsprechstation in einer geschnittenen Seitenansicht.The illustration shows part of a keypad for a telephone station in a sectioned side view.

Bei der dargestellten Tastatur für eine Fernsprechstation sind in einem Tastaturgehäuse 1 mehrere Tastenknöpfe 2 innerhalb von Ausnehmungen 3 angeordnet. Der jeweilige Tastenknopf 2 betätigt durch Druck in Pfeilrichtung A den Hubbalg 4 einer Gummimatte 5. Der Hubbalg 4 wirkt auf Kontakte einer Kontaktfolie 6 ein, die über Stecker mit entsprechenden Einrichtungen der Fernsprechstation verbunden sind.In the illustrated keyboard for a telephone station are in a keyboard housing 1 a plurality of key buttons 2 arranged within recesses 3. The respective key button 2 actuates the lifting bellows by pressing in the direction of arrow A. 4 of a rubber mat 5. The lifting bellows 4 acts on contacts of a contact foil 6, which are connected via plugs to corresponding devices of the telephone station are.

Um von außen auf die Tastatur einwirkende elektromagnetische Einflüsse weitgehend auszuschalten, ist im Bereich der Tastatur eine metallische Druckplatte 7 angeordnet.To external electromagnetic influences acting on the keyboard to be largely switched off, there is a metallic pressure plate in the area of the keyboard 7 arranged.

Diese Druckplatte 7 kann z.B. mit dem Tastaturgehäuse 1 verrastet sein. An der dieser Druckplatte 7 zugewandten Fläche der Kontaktfolie 6 sind mehrere Kontaktpunkte 9 angeordnet, die eine elektrische Verbindung zwischen der Kontaktfolie 6 und der Druckplatte 7 herstellen.This pressure plate 7 can, for example, be connected to the keyboard housing 1 latched be. On the surface of the contact foil 6 facing this pressure plate 7 there are several Arranged contact points 9, which establish an electrical connection between the contact foil 6 and the pressure plate 7.

Zur Erhöhung der Anpreßkraft zwischen der Kontaktfolie 6 und der Druckplatte 7 dienen warzenförmige Erhebungen 8, die an der den Tastenknöpfen 2 zugewandten Oberfläche der Gummimatte 5 angeordnet sind.To increase the contact pressure between the contact foil 6 and the pressure plate 7 are used wart-shaped elevations 8 on the button 2 facing Surface of the rubber mat 5 are arranged.

3 Patentansprüche 1 Figur3 claims 1 figure

Claims (3)

Patentansprüche Tastatur für Fernsprechstationen mit mehreren in einem Tastaturgehäuse geführten und gehalterten Tastenknöpfen, die-mit Hubbälgen einer Gummimatte auf eine Kontaktfolie einwirken, d a d u r c h g e k e n n z e i c h n e t daß im Bereich der den Tastenknöpfen (2) abgewandten Seite der Kontaktfolie (6) eine metallische Druckplatte (7) angeordnet ist, wobei an der Gummimatte (5) warzenförmige Erhebungen (8) vorgesehen sind.Keyboard for telephone stations with several in one Keyboard housing guided and held key buttons, which -with lifting bellows a The rubber mat acts on a contact foil, that is to say, it is not possible to use it n e t that in the area of the side of the contact foil facing away from the key buttons (2) (6) a metallic pressure plate (7) is arranged, with the rubber mat (5) wart-shaped elevations (8) are provided. 2. Tastatur nach Anspruch 1, d a d u r c h g e k e n n -z e i c h n e t , daß die Erhebungen (8) auf der den Tastenknöpfen (2) zugewandten Seite der Gummimatte (5) vorgesehen sind.2. Keyboard according to claim 1, d a d u r c h g e k e n n -z e i c h n e t that the elevations (8) on the side facing the key buttons (2) Rubber mat (5) are provided. 3. Tastatur nach Anspruch 1, d a d u r c h g e k e n n -z e i c h n e t , daß die Druckplatte (7) mit dem Tastaturgehäuse (1) verrastet ist.3. Keyboard according to claim 1, d a d u r c h g e k e n n -z e i c h n e t that the pressure plate (7) is locked to the keyboard housing (1).
DE19833344896 1983-12-12 1983-12-12 Keypad for telephone stations Withdrawn DE3344896A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19833344896 DE3344896A1 (en) 1983-12-12 1983-12-12 Keypad for telephone stations
DE19838335619 DE8335619U1 (en) 1983-12-12 1983-12-12 Keyboard for telephone stations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19833344896 DE3344896A1 (en) 1983-12-12 1983-12-12 Keypad for telephone stations

Publications (1)

Publication Number Publication Date
DE3344896A1 true DE3344896A1 (en) 1985-06-13

Family

ID=6216718

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19838335619 Expired DE8335619U1 (en) 1983-12-12 1983-12-12 Keyboard for telephone stations
DE19833344896 Withdrawn DE3344896A1 (en) 1983-12-12 1983-12-12 Keypad for telephone stations

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE19838335619 Expired DE8335619U1 (en) 1983-12-12 1983-12-12 Keyboard for telephone stations

Country Status (1)

Country Link
DE (2) DE8335619U1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0557742A1 (en) * 1992-02-28 1993-09-01 TEMIC TELEFUNKEN microelectronic GmbH Membrane switch assembly
DE19628991C1 (en) * 1996-07-18 1997-07-17 Kostal Leopold Gmbh & Co Kg Electric pushbutton switch for motor vehicle
WO2002093599A1 (en) * 2001-05-11 2002-11-21 Fairlight Esp Pty Ltd A switch assembly

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4328399A (en) * 1979-02-05 1982-05-04 Northern Telecom Limited Pushbutton switch assembly for telecommunications and other input

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4328399A (en) * 1979-02-05 1982-05-04 Northern Telecom Limited Pushbutton switch assembly for telecommunications and other input

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0557742A1 (en) * 1992-02-28 1993-09-01 TEMIC TELEFUNKEN microelectronic GmbH Membrane switch assembly
DE19628991C1 (en) * 1996-07-18 1997-07-17 Kostal Leopold Gmbh & Co Kg Electric pushbutton switch for motor vehicle
WO2002093599A1 (en) * 2001-05-11 2002-11-21 Fairlight Esp Pty Ltd A switch assembly

Also Published As

Publication number Publication date
DE8335619U1 (en) 1988-08-18

Similar Documents

Publication Publication Date Title
DE69409178T2 (en) Push button switch
DE2828435A1 (en) PUSH BUTTON SWITCH
DE29713756U1 (en) Waterproof keyboard device
DE2451546C3 (en) Keypad
DE2907697C2 (en) Keyboard for an electronic device
DE29600117U1 (en) Key switch unit for computer keyboards
DE3443988A1 (en) SPRING DEVICE FOR A KEYBOARD
EP0064615A2 (en) Telephone equipment with selection keyboard
DE3344896A1 (en) Keypad for telephone stations
EP0210973A1 (en) Push button key board
DE2439697B2 (en) PRESSURE SWITCH
WO1999052257A1 (en) Telecommunication terminal
EP0078036B1 (en) Key set for a communication equipment terminal
DE3228242C2 (en) keyboard
DE7739031U1 (en) Connection plate
DE69805706T2 (en) Push button-type electrical switching device, in particular for printed circuits
EP0966826A1 (en) Input device for radio-operated communications terminals
DE9013577U1 (en) Button for electrical device
DE8914142U1 (en) Switch foil
DE3335582A1 (en) Keypad for telephone sets
EP0577859B1 (en) Keyboard
DE9311586U1 (en) Holder for a display within a telephone station
DE2636849B2 (en) Loudspeaker device for telephone sets
DE9011110U1 (en) Keyboard, especially for a computer terminal
DE8800954U1 (en) Keyboard for telephone stations

Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8130 Withdrawal