Nothing Special   »   [go: up one dir, main page]

EP0322514A3 - Keyboard switch system - Google Patents

Keyboard switch system Download PDF

Info

Publication number
EP0322514A3
EP0322514A3 EP19880115127 EP88115127A EP0322514A3 EP 0322514 A3 EP0322514 A3 EP 0322514A3 EP 19880115127 EP19880115127 EP 19880115127 EP 88115127 A EP88115127 A EP 88115127A EP 0322514 A3 EP0322514 A3 EP 0322514A3
Authority
EP
European Patent Office
Prior art keywords
pattern
base member
circuitry
switch system
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.)
Withdrawn
Application number
EP19880115127
Other languages
German (de)
French (fr)
Other versions
EP0322514A2 (en
Inventor
Brian G. Spreadbury
Ralph W. Kinser, 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.)
HP Inc
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of EP0322514A2 publication Critical patent/EP0322514A2/en
Publication of EP0322514A3 publication Critical patent/EP0322514A3/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Withdrawn legal-status Critical Current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
    • H01H13/78—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 characterised by the contacts or the contact sites
    • H01H13/80—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 characterised by the contacts or the contact sites characterised by the manner of cooperation of the contacts, e.g. with both contacts movable or with bounceless contacts
    • 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
    • H01H2201/00—Contacts
    • H01H2201/008—Both contacts movable

Landscapes

  • Push-Button Switches (AREA)

Abstract

A keyboard (10) is described including a rigid base member (12) with a pattern of depressions (14) in it, electrical circuitry (16) on a flexible support carried by the base member, and a plurality of domes (24) covering the circuitry. The electrical circuitry defines a plurality of open switches (17) in registry with the pattern of depressions in the base. The pattern of domes is in registry with the open switches. The underside of each dome includes a conductive surface which will complete a connection across a switch when the dome is de­ pressed, whereby the switch circuitry is deflected downwardly into a depression in the base member.
EP19880115127 1987-12-30 1988-09-15 Keyboard switch system Withdrawn EP0322514A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13967987A 1987-12-30 1987-12-30
US139679 1987-12-30

Publications (2)

Publication Number Publication Date
EP0322514A2 EP0322514A2 (en) 1989-07-05
EP0322514A3 true EP0322514A3 (en) 1990-09-12

Family

ID=22487809

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880115127 Withdrawn EP0322514A3 (en) 1987-12-30 1988-09-15 Keyboard switch system

Country Status (2)

Country Link
EP (1) EP0322514A3 (en)
JP (1) JPH01209617A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0320830U (en) * 1989-07-12 1991-02-28
US5294762A (en) * 1991-09-10 1994-03-15 Fujikura Ltd. Click-action membrane switch unit
GB9519557D0 (en) * 1995-09-26 1995-11-29 Psion Plc Key assembly
US6727445B2 (en) * 2001-06-14 2004-04-27 Secure Care Products, Inc. Sensor pads for patient monitoring devices
DE102011116331B4 (en) * 2011-10-19 2022-04-21 Kostal Automobil Elektrik Gmbh & Co. Kg Electric push button

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2039417A (en) * 1978-12-01 1980-08-06 Maag Gummi Contact pad switch
EP0210973A1 (en) * 1985-06-14 1987-02-04 Siemens Aktiengesellschaft Österreich Push button key board
EP0233296A1 (en) * 1985-08-16 1987-08-26 Fuji Rubber Co. Ltd. Contact rubber
EP0241906A2 (en) * 1986-04-17 1987-10-21 Wilhelm Ruf KG Layered keyboard

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS509098A (en) * 1973-05-31 1975-01-30

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2039417A (en) * 1978-12-01 1980-08-06 Maag Gummi Contact pad switch
EP0210973A1 (en) * 1985-06-14 1987-02-04 Siemens Aktiengesellschaft Österreich Push button key board
EP0233296A1 (en) * 1985-08-16 1987-08-26 Fuji Rubber Co. Ltd. Contact rubber
EP0241906A2 (en) * 1986-04-17 1987-10-21 Wilhelm Ruf KG Layered keyboard

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 7535, Derwent Publications Ltd, London, GB; Class L03, AN-75-57743W & JP-A-50 009 098 (KOJUNDO KAGAKU KEN) 30 January 1975 *

Also Published As

Publication number Publication date
JPH01209617A (en) 1989-08-23
EP0322514A2 (en) 1989-07-05

Similar Documents

Publication Publication Date Title
US4366355A (en) Keyboard
CA1154810A (en) Tactile element and keyboard including the tactile element
US4128744A (en) Keyboard with concave and convex domes
US4634818A (en) Switches and keyboards
US4492829A (en) Tactile membrane keyboard with asymmetrical tactile key elements
CA1131733A (en) Keyboard assembly and keyboard switch
US4046975A (en) Keyboard switch assembly having internal gas passages preformed in spacer member
US4096364A (en) Keyboard switch assembly having flexible contact layer with snap initiator dome
EP0920040A3 (en) Dual tact switch assembly
GB1411589A (en) Pushbutton keyboard system
GB2117567A (en) Monolithic flat tactile keyboard
GB2079061A (en) Keyboard devices and switches thereof
GB1433184A (en) Push button keyboard switch assembly for a telecommunication system
EP0367204A3 (en) Improved low profile rubber keypad
GB1536079A (en) Flat keyboard electric switch assembly
MY116148A (en) Push-on switch
EP0232137A3 (en) Improvements in or relating to relegendable pushbutton switches
JPH01209616A (en) Keyboard switch
US3995128A (en) Pushbutton keyboard system having preformed recessed support with contacts mounted on face and in recesses
US4286129A (en) Keyboard having sudden trip tactile effect keys
US4085306A (en) Keyboard switch assemblies
EP0322514A3 (en) Keyboard switch system
GB2202991A (en) Improved membrane keyboard
CA2077870A1 (en) Click-action membrane switch unit
US4551586A (en) Multiple contact layer membrane switch

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

Kind code of ref document: A2

Designated state(s): DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

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: 19901002