GB1435434A - Key switch assembly for keyboards - Google Patents

Key switch assembly for keyboards

Info

Publication number
GB1435434A
GB1435434A GB1922574A GB1922574A GB1435434A GB 1435434 A GB1435434 A GB 1435434A GB 1922574 A GB1922574 A GB 1922574A GB 1922574 A GB1922574 A GB 1922574A GB 1435434 A GB1435434 A GB 1435434A
Authority
GB
United Kingdom
Prior art keywords
region
spring
contacts
actuator
diaphragm
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.)
Expired
Application number
GB1922574A
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.)
Unisys Corp
Original Assignee
Burroughs 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 Burroughs Corp filed Critical Burroughs Corp
Publication of GB1435434A publication Critical patent/GB1435434A/en
Expired 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
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/52—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state immediately upon removal of operating force, e.g. bell-push switch
    • 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
    • H01H13/705—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 construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2201/00—Contacts
    • H01H2201/002—Contacts bounceless
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2201/00—Contacts
    • H01H2201/004—Wiping action
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2203/00—Form of contacts
    • H01H2203/036—Form of contacts to solve particular problems
    • H01H2203/054—Form of contacts to solve particular problems for redundancy, e.g. several contact pairs in parallel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/024—Transmission element
    • H01H2221/026—Guiding or lubricating nylon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/062—Damping vibrations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2233/00—Key modules
    • H01H2233/07—Cap or button on actuator part
    • H01H2233/074—Snap coupling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2235/00—Springs
    • H01H2235/004—Two parallel coil springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2235/00—Springs
    • H01H2235/018—Spring seat
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2235/00—Springs
    • H01H2235/022—Actuating striker
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2235/00—Springs
    • H01H2235/03—Two serial springs

Landscapes

  • Push-Button Switches (AREA)

Abstract

1435434 Retractive switches BURROUGHS CORP 2 May 1974 [1 June 1973] 19225/74 Heading H1N In a switch assembly in which conductive leads on the underside of a flexible diaphragm 22, Fig. 2, are deflected into engagement with contacts 16 on a rigid base 14, the actuator 54 is coupled to the flexible diaphragm through a compression coil spring 42 while resistance to movement of the actuator 54 is increased by a concentric coil spring 44 engaged between a flange 56 of the actuator 54 and a stationary support 38. The actuating spring 42 has a region 72 of close coils and a region 74 of open coils whereby two spring rates are obtained so that a firm application of the contacts is obtained to avoid contact bounce. Conical surfaces of the outer flange 56 and of an internal projection 70 support the springs 42, 44 against lateral deflection when compressed. The spring 42 acts on the diaphragm 22 through flexured member 28 made of thicker more rigid material than the diaphragm 22 but having slits 34 around the central region to render it flexible. The member 28 has a pair of projections 76, Fig. 7, on its underside adapted to co-operate with a pair of parallel contacts 24. The projections 76 are arcuate to permit the member 28 to tilt freely by rolling. Universal tilting is obtained, by providing only a narrow contact region 78 between the member 28 and the spring 42. The parallel contacts 24 may also be separated in the region of engagement to form pairs of axially aligned contacts 90, Fig. 11, whereby initial contact is made at the pointed ends with high pressure until the contact area is increased. A button 48 may be releasably attached to the actuator 54 by means of flexible prongs 64 engageable in a notched recess 66, 68.
GB1922574A 1973-06-01 1974-05-02 Key switch assembly for keyboards Expired GB1435434A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00366128A US3856998A (en) 1973-06-01 1973-06-01 Keyboard switch assembly with improved operating means

Publications (1)

Publication Number Publication Date
GB1435434A true GB1435434A (en) 1976-05-12

Family

ID=23441777

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1922574A Expired GB1435434A (en) 1973-06-01 1974-05-02 Key switch assembly for keyboards

Country Status (4)

Country Link
US (1) US3856998A (en)
BE (1) BE815400A (en)
FR (1) FR2232060B1 (en)
GB (1) GB1435434A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136633A (en) * 1983-03-18 1984-09-19 Broderna Danielson Membrane switch assembly
GB2140213A (en) * 1983-05-21 1984-11-21 Alps Electric Co Ltd Push-button switch
GB2183916A (en) * 1985-11-13 1987-06-10 Devlin Electronics Limited Improvements relating to keypads
GB2193378A (en) * 1986-07-11 1988-02-03 Access Keyboards Limited A push button switch actuator

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4055734A (en) * 1973-12-26 1977-10-25 Thomas John Hayden Keyboard switch assembly with hinged pushbuttons and cantilevered terminal members
US4004121A (en) * 1974-04-04 1977-01-18 Mechanical Enterprises, Inc. Electrical switch with wire beam spring contact closer
AT337275B (en) * 1974-05-07 1977-06-27 Preh Elektro Feinmechanik ULTRASONIC REMOTE CONTROL DEVICE
US4066860A (en) * 1974-09-26 1978-01-03 Sharp Kabushiki Kaisha Pushbutton switch key arrangement for keyboards having indicia
US4029916A (en) * 1975-04-18 1977-06-14 Northern Electric Company Limited Multi-contact push-button switch and plural embodiment for keyboard switch assembly
US4022993A (en) * 1975-06-09 1977-05-10 Litton Systems, Inc. Switch assembly having electrically illuminated character display devices between transparent actuators and switch arrays
US3969600A (en) * 1975-06-11 1976-07-13 Burroughs Corporation Tactile feedback keyboard switch assembly and actuator
US4086451A (en) * 1976-12-06 1978-04-25 Texas Instruments Incorporated Keyboard apparatus
US4124787A (en) * 1977-03-11 1978-11-07 Atari, Inc. Joystick controller mechanism operating one or plural switches sequentially or simultaneously
US4129758A (en) * 1977-06-10 1978-12-12 Telaris Telecommunications, Inc. Keyboard switch assembly having flexible contact carrying member between contact carrying substrate and flexible, resilient, key-depressible bubble protrusions
US4117292A (en) * 1977-06-10 1978-09-26 Telaris Telecommunications, Inc. Dual spring actuator for keyboard switch assembly
US4156802A (en) * 1977-06-10 1979-05-29 Telaris Telecommunications, Inc. Electrical switch assembly
US4191871A (en) * 1978-09-12 1980-03-04 Westinghouse Electric Corp. Push-button assembly
US4274752A (en) * 1979-04-02 1981-06-23 International Business Machines Corporation Keyboard multiple switch assembly
CH640997B (en) * 1980-10-10 Ebauchesfabrik Eta Ag WATCH INCLUDING A CONTROL DEVICE.
US4440992A (en) * 1982-03-03 1984-04-03 Amp Incorporated Low profile keyboard switch actuating assembly
US4417115A (en) * 1982-03-03 1983-11-22 Amp Incorporated Switch actuating assembly having improved cams and plural modes
GB2124156A (en) * 1982-07-22 1984-02-15 Spiralux Ltd Keyboards
US4553009A (en) * 1982-09-03 1985-11-12 Oak Industries Inc. Keyboard switch with pivotal actuator lever
US4453198A (en) * 1982-09-15 1984-06-05 General Instrument Corporation Linear feel keyswitch with hysteresis
US4454562A (en) * 1982-09-15 1984-06-12 General Instrument Corporation Keyswitch with telescoping plunger
US4492838A (en) * 1983-02-24 1985-01-08 Amp Incorporated Key switch having an actuator integral with the return spring
JPS59195632U (en) * 1983-06-15 1984-12-26 日通工株式会社 push button switch
US4638133A (en) * 1985-04-05 1987-01-20 Square D Company Rotary switch assembly
CA1280796C (en) * 1985-10-16 1991-02-26 Kazutoshi Hayashi Pushbutton switch using dome spring and switch element thereof
EP0339209B1 (en) * 1988-03-31 1995-05-17 Oki Electric Industry Company, Limited Push-button switch
US5173578A (en) * 1988-11-18 1992-12-22 Matsushita Electric Industrial Co., Ltd. Push button switch assembly
US5120923A (en) * 1989-10-06 1992-06-09 Takafumi Kato Push button switch
US5201824A (en) * 1989-10-06 1993-04-13 Alps Electric Co., Ltd. Push button switch
DE4116792A1 (en) * 1990-08-20 1992-02-27 Swf Auto Electric Gmbh DEVICE, ESPECIALLY ELECTRIC PUSH BUTTON SWITCH
US5418530A (en) * 1991-05-31 1995-05-23 Compaq Computer Corporation Key with silent return movement
US5215187A (en) * 1992-01-31 1993-06-01 Acer Incorporated Keyboard membrane keyswitch assembly
DE102008049441B3 (en) * 2008-09-29 2010-07-15 Vladimir Dvornikov Electric key for keyboard, has spring element for forming two concave spring element parts with reduced width and height at releasing point, where spring element parts cause spring stage of force-displacement-characteristic curve
JP6176999B2 (en) 2013-05-14 2017-08-09 富士通コンポーネント株式会社 Key switch device and keyboard
JP6400960B2 (en) 2013-12-13 2018-10-03 富士通コンポーネント株式会社 Key switch device, keyboard and reaction force generating member
WO2016041516A1 (en) * 2014-09-18 2016-03-24 张文嵛 Key switch, key unit and computer keyboard
JP2017016906A (en) * 2015-07-01 2017-01-19 富士通コンポーネント株式会社 Key switch device and keyboard
TWI607476B (en) 2016-02-03 2017-12-01 達方電子股份有限公司 Keyswitch structure
JP7042034B2 (en) 2017-03-30 2022-03-25 富士通コンポーネント株式会社 Reaction force generating member and key switch device
US10102987B1 (en) * 2017-05-16 2018-10-16 Massdrop Group, Inc. Keyboard switch with a cam having a curved profile to promote a smooth tactile response

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE726881C (en) * 1939-10-14 1942-10-22 Stotz Kontakt Gmbh Electric push button switch
DE931153C (en) * 1953-03-15 1955-08-01 Volkswagenwerk G M B H Dimmer switch, especially for motor vehicles
DE1665312B2 (en) * 1966-02-08 1975-11-06 Patinvest Patent- U. Investment Ag, Chur (Schweiz) Pressure-dependent, multi-pole electrical snap-action switch
US3379851A (en) * 1966-02-09 1968-04-23 United Carr Inc Pushbutton using three stage unitary spring as a contactor means
US3408464A (en) * 1967-05-10 1968-10-29 Stewart Warner Corp Brake switch
US3521013A (en) * 1968-03-21 1970-07-21 Molex Products Co Pushbutton switch mechanism including a rocker contact and an actuator
US3600528A (en) * 1969-09-25 1971-08-17 Lematex Corp Multiple switch construction
US3584162A (en) * 1970-02-16 1971-06-08 Ibm Electrical keyboard switch mechanism with improved resilient diaphragm contact actuator
US3699296A (en) * 1971-05-21 1972-10-17 Ibm Catastrophically buckling compression column switch and actuator
US3743798A (en) * 1971-09-13 1973-07-03 North American Rockwell Elongated spring coil conductors applying tension force to pushbutton actuators in keyboard matrix switch assembly
US3707609A (en) * 1971-10-27 1972-12-26 Texas Instruments Inc Diaphragm pushbutton switch array for keyboards
US3773998A (en) * 1972-10-16 1973-11-20 Chomerics Inc Pedestal and spring member for key actuator of diaphragm switch

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136633A (en) * 1983-03-18 1984-09-19 Broderna Danielson Membrane switch assembly
GB2140213A (en) * 1983-05-21 1984-11-21 Alps Electric Co Ltd Push-button switch
GB2183916A (en) * 1985-11-13 1987-06-10 Devlin Electronics Limited Improvements relating to keypads
GB2183916B (en) * 1985-11-13 1990-02-07 Devlin Electronics Limited Improvements relating to telephone keypads
GB2193378A (en) * 1986-07-11 1988-02-03 Access Keyboards Limited A push button switch actuator

Also Published As

Publication number Publication date
BE815400A (en) 1974-09-16
FR2232060A1 (en) 1974-12-27
US3856998A (en) 1974-12-24
FR2232060B1 (en) 1977-09-30

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee