EP0058849A3 - Membrane keyboard assembly - Google Patents

Membrane keyboard assembly Download PDF

Info

Publication number
EP0058849A3
EP0058849A3 EP82100748A EP82100748A EP0058849A3 EP 0058849 A3 EP0058849 A3 EP 0058849A3 EP 82100748 A EP82100748 A EP 82100748A EP 82100748 A EP82100748 A EP 82100748A EP 0058849 A3 EP0058849 A3 EP 0058849A3
Authority
EP
European Patent Office
Prior art keywords
contact
keyboard assembly
indicia
membrane keyboard
contacts
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Withdrawn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
EP82100748A
Other languages
German (de)
French (fr)
Other versions
EP0058849A2 (en
Inventor
Robert Langford Anderson, Jr.
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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of EP0058849A2 publication Critical patent/EP0058849A2/en
Publication of EP0058849A3 publication Critical patent/EP0058849A3/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Withdrawn legal-status Critical Current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
    • H01H2229/00—Manufacturing
    • H01H2229/002—Screen printing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/002—Screen printing
    • H01H2229/004—Conductive ink
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/008—Static electricity considerations

Landscapes

  • Push-Button Switches (AREA)

Abstract

The assembly includes a flexible insulating film (12) with indicia (21) visible on the upper surface and conductive contacts (14, 16, 18) on the lower surface. The top film may be comprised of two separate films (20, 12) for ease of applying the indicia and the contacts. The other contact of each SPST switch is a ground or reference contact formed by a chassis (10) or other relatively large and rigid conductive surface. A resilient spacer (22) is retained between the upper and lower switch contact surfaces and contains an aperture in registration with each upper switch contact.
EP82100748A 1981-02-19 1982-02-03 Membrane keyboard assembly Withdrawn EP0058849A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US23607581A 1981-02-19 1981-02-19
US236075 1981-02-19

Publications (2)

Publication Number Publication Date
EP0058849A2 EP0058849A2 (en) 1982-09-01
EP0058849A3 true EP0058849A3 (en) 1983-06-29

Family

ID=22888038

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82100748A Withdrawn EP0058849A3 (en) 1981-02-19 1982-02-03 Membrane keyboard assembly

Country Status (1)

Country Link
EP (1) EP0058849A3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4525606A (en) * 1983-01-28 1985-06-25 Ryoichi Sado Sensor switch
JPH04354398A (en) * 1991-05-31 1992-12-08 Internatl Business Mach Corp <Ibm> Wiring board and manufacture thereof
CN110544595B (en) * 2019-09-07 2024-02-27 厦门铭彩电子科技有限公司 Antistatic membrane switch and manufacturing method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090045A (en) * 1975-12-15 1978-05-16 Marsh Products, Inc. Keyboard strip switch assembly having multifurcated conductive screen contact with contact cleaning wiping-action
DE2926312A1 (en) * 1979-06-29 1981-01-29 Licentia Gmbh Foil-type press-button switch - has printed contacts on top foil and baseplate separated by perforated insulation foil
US4249054A (en) * 1978-02-28 1981-02-03 Sharp Kabushiki Kaisha Metallic housing for an electronic apparatus with a flat keyboard

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090045A (en) * 1975-12-15 1978-05-16 Marsh Products, Inc. Keyboard strip switch assembly having multifurcated conductive screen contact with contact cleaning wiping-action
US4249054A (en) * 1978-02-28 1981-02-03 Sharp Kabushiki Kaisha Metallic housing for an electronic apparatus with a flat keyboard
DE2926312A1 (en) * 1979-06-29 1981-01-29 Licentia Gmbh Foil-type press-button switch - has printed contacts on top foil and baseplate separated by perforated insulation foil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MACHINE DESIGN, vol. 52, no. 7, April 1980, Cleveland, Ohio, USA J.K. HAGGERTY "membrane switches low-cost companion for electronic logic", pages 90-95 *

Also Published As

Publication number Publication date
EP0058849A2 (en) 1982-09-01

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): DE FR GB IT

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19840606

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ANDERSON, ROBERT LANGFORD, JR.