EP0240192A3 - Membrane switch - Google Patents

Membrane switch Download PDF

Info

Publication number
EP0240192A3
EP0240192A3 EP87302141A EP87302141A EP0240192A3 EP 0240192 A3 EP0240192 A3 EP 0240192A3 EP 87302141 A EP87302141 A EP 87302141A EP 87302141 A EP87302141 A EP 87302141A EP 0240192 A3 EP0240192 A3 EP 0240192A3
Authority
EP
European Patent Office
Prior art keywords
conductors
conductor
conductive material
aperture
coincident
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Withdrawn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
EP87302141A
Other languages
German (de)
French (fr)
Other versions
EP0240192A2 (en
Inventor
William Phelan
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.)
Chrome Print Ltd
Original Assignee
Chrome Print Ltd
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 Chrome Print Ltd filed Critical Chrome Print Ltd
Publication of EP0240192A2 publication Critical patent/EP0240192A2/en
Publication of EP0240192A3 publication Critical patent/EP0240192A3/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Withdrawn legal-status Critical Current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
    • 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
    • H01H13/703—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 characterised by spacers between contact carrying layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2211/00—Spacers
    • H01H2211/006—Individual areas
    • H01H2211/01—Ink
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2211/00—Spacers
    • H01H2211/006—Individual areas
    • H01H2211/014—Individual areas universal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2211/00—Spacers
    • H01H2211/022—Spacers for larger actuation area
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00—Dimensions; Characteristics
    • H01H2227/024—Spacer elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/03—Avoiding erroneous switching

Landscapes

  • Push-Button Switches (AREA)

Abstract

A membrane switch is provided which comprises a base layer (10) of non-conductive material, a static circuit in the form of a first electrical conductor or conductors (11) mounted on said base layer, a spacer layer (14) having at least one aperture (15) therein which is coincident with said first conductor or conductors (11), a dynamic circuit in the form of a second electrical conductor or conductors (13) coincident with said aperture facing said first electrical conductor or conductors (11), and a resilient membrane (12) covering said second conductor or conductors (13).
Within the area bounded by the aperture a discontinuous layer of non-conductive material (16) is provided between said first conductor or conductors and said second conductor or conductors, whereby the first conductor or conductors is/are spaced from the second conductor or conductors until the resilient membrane is depressed by the user's finger and contact is made between the opposed first and second conductors in zones free of the non-conductive material.
In this manner advantage can be made of the deformable texture of the fleshy pad of the finger in that the latter will press one conductor (13) on both sides of a line of non-conductive material (16) into contact with its opposite conductor the pad temporarily deforming to accommodate the non-conductive line.
EP87302141A 1986-03-15 1987-03-12 Membrane switch Withdrawn EP0240192A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868606457A GB8606457D0 (en) 1986-03-15 1986-03-15 Membrane switch
GB8606457 1986-03-15

Publications (2)

Publication Number Publication Date
EP0240192A2 EP0240192A2 (en) 1987-10-07
EP0240192A3 true EP0240192A3 (en) 1988-10-26

Family

ID=10594697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87302141A Withdrawn EP0240192A3 (en) 1986-03-15 1987-03-12 Membrane switch

Country Status (2)

Country Link
EP (1) EP0240192A3 (en)
GB (1) GB8606457D0 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU593927B2 (en) * 1986-08-04 1990-02-22 Standard Telephones And Cables Pty. Limited Improved pushbutton
AU2003260989A1 (en) * 2003-03-04 2004-09-28 Young-Woo Lee Membrane switch and its application to acoustic strip wallpaper and picture board
FR2958445B1 (en) * 2010-03-31 2013-02-15 Dav CONTROL MODULE

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317013A (en) * 1980-04-09 1982-02-23 Oak Industries, Inc. Membrane switch with universal spacer means
GB2084405A (en) * 1980-09-22 1982-04-07 Rogers Corp Electrical switch
GB2107933A (en) * 1981-10-16 1983-05-05 Shinetsu Polymer Co Key board unit
FR2520923A1 (en) * 1982-01-29 1983-08-05 Sharp Kk MEMBRANE KEYBOARD

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4317013A (en) * 1980-04-09 1982-02-23 Oak Industries, Inc. Membrane switch with universal spacer means
GB2084405A (en) * 1980-09-22 1982-04-07 Rogers Corp Electrical switch
GB2107933A (en) * 1981-10-16 1983-05-05 Shinetsu Polymer Co Key board unit
FR2520923A1 (en) * 1982-01-29 1983-08-05 Sharp Kk MEMBRANE KEYBOARD

Also Published As

Publication number Publication date
GB8606457D0 (en) 1986-04-23
EP0240192A2 (en) 1987-10-07

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Effective date: 19890427

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Inventor name: PHELAN, WILLIAM