GB1396467A - Keyborard switch - Google Patents

Keyborard switch

Info

Publication number
GB1396467A
GB1396467A GB3994373A GB3994373A GB1396467A GB 1396467 A GB1396467 A GB 1396467A GB 3994373 A GB3994373 A GB 3994373A GB 3994373 A GB3994373 A GB 3994373A GB 1396467 A GB1396467 A GB 1396467A
Authority
GB
United Kingdom
Prior art keywords
tubular
buttons
march
insulating spacer
sheet
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
GB3994373A
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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
Priority claimed from JP1973022310U external-priority patent/JPS5327328Y2/ja
Priority claimed from JP2093873A external-priority patent/JPS5331537B2/ja
Priority claimed from JP3406773U external-priority patent/JPS5327330Y2/ja
Priority claimed from JP1973037336U external-priority patent/JPS5512331Y2/ja
Priority claimed from JP3840373U external-priority patent/JPS5512332Y2/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB1396467A publication Critical patent/GB1396467A/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
    • H01H13/702—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J5/00—Devices or arrangements for controlling character selection
    • B41J5/08—Character or syllable selected by means of keys or keyboards of the typewriter type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2237/00—Mechanism between key and laykey

Landscapes

  • Push-Button Switches (AREA)

Abstract

1396467 Retractive switches MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 23 Aug 1973 [20 Feb 1973 (2) 20 March 1973 27 March 1973 29 March 1973] 39943/73 Heading H1N A keyboard switch, suitable for a desktop electronic calculator, for example, comprises at least a row of buttons 21 and tubular resilient means 23 disposed such that depression of a button deforms the corresponding portion of said tubular means to bring conductor means into contact with electrode means 31 fixed on a printed-circuit board 32 and thereby close a circuit, and release of the button causes it to be retracted by the inherent resilience of the tubular means 23 to open the said circuit. As shown the conductor means comprises a flexible sheet 28 loaded with conductive powder, for example, carbon black, and this is depressed by semispherical projections 27 on buttons 21 acting via resilient synthetic plastics tubular member 23. Contact bounce is stated to be prevented. An insulating spacer 30 having as many apertures 29 as there are buttons 21 is interposed as shown. The tubular means 23 may be held in notches (24), Fig. 4, not shown) in a frame (20) accommodating several rows of buttons 21. The tubular means 23 may be of various crosssections (Figs. 6a to 6d) or may be integral with an insulating spacer sheet (36, Figs. 9a and 9b). The tubular member (34, Fig. 7, not shown) may contain conductive substance in whole or in parts, thereby avoiding the use of the separate conductive sheet 28; it may be formed with integral projections (35, Fig. 8, not shown) to avoid the need of the separate insulating spacer sheet 30.
GB3994373A 1973-02-20 1973-08-23 Keyborard switch Expired GB1396467A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP1973022310U JPS5327328Y2 (en) 1973-02-20 1973-02-20
JP2093873A JPS5331537B2 (en) 1973-02-20 1973-02-20
JP3406773U JPS5327330Y2 (en) 1973-03-20 1973-03-20
JP1973037336U JPS5512331Y2 (en) 1973-03-27 1973-03-27
JP3840373U JPS5512332Y2 (en) 1973-03-29 1973-03-29

Publications (1)

Publication Number Publication Date
GB1396467A true GB1396467A (en) 1975-06-04

Family

ID=27520272

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3994373A Expired GB1396467A (en) 1973-02-20 1973-08-23 Keyborard switch

Country Status (6)

Country Link
US (1) US3911233A (en)
DE (1) DE2345578A1 (en)
FR (1) FR2218636B1 (en)
GB (1) GB1396467A (en)
IT (1) IT1000056B (en)
NL (1) NL7312430A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4242546A (en) 1978-11-06 1980-12-30 International Telephone And Telegraph Corporation Electrical push-button switch
GB2133216A (en) * 1982-11-30 1984-07-18 Nippon Mektron Kk Keyboard switch

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4032728A (en) * 1974-12-20 1977-06-28 Olympia Werke Ag Push button switch
US4109118A (en) * 1976-09-01 1978-08-22 Victor Kley Keyswitch pad
US4418605A (en) * 1980-06-25 1983-12-06 Pratt-Read Corporation Keyboard for musical instrument
DE3123438C2 (en) * 1981-06-12 1985-02-07 Wilhelm Ruf KG, 8000 München Switching arrangement
US4500756A (en) * 1982-03-19 1985-02-19 Pratt-Read Corporation Keyboard switch having a deformable membrane formed of cellular urethane
GB8303679D0 (en) * 1983-02-10 1983-03-16 Gould Instr Ltd Variable control device
US4456800A (en) * 1983-05-25 1984-06-26 Allen-Bradley Company Planar contact array switch having improved ground path for dissipating electrostatic discharges
CN86101312A (en) * 1985-02-12 1986-10-22 日本乐器制造株式会社 Keyboard switch apparatus for electronic musical instrument
JP3099165B2 (en) * 1993-06-28 2000-10-16 セイコーインスツルメンツ株式会社 Electronic device having switch mechanism and method of manufacturing substrate
US6423918B1 (en) * 2000-03-21 2002-07-23 Lear Corporation Dome switch
TW554358B (en) * 2002-08-13 2003-09-21 Umax Data Systems Inc Structure of button and method of design the same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2025981A (en) * 1935-05-29 1935-12-31 Fred I Getty Multiple circuit closer for steering wheels
US2848920A (en) * 1955-03-02 1958-08-26 John M Lester Key contact system for electronic organs
US3304386A (en) * 1964-06-25 1967-02-14 Jr Bernard Edward Shlesinger Multiple contact program system fluid pressure type
US3600528A (en) * 1969-09-25 1971-08-17 Lematex Corp Multiple switch construction
US3668337A (en) * 1971-01-18 1972-06-06 Thomas & Betts Corp Matrix switch with improved flexible insulative spacer arrangement
US3745536A (en) * 1971-03-01 1973-07-10 Burroughs Corp High speed serial scan and read-out of keyboards
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
US3773998A (en) * 1972-10-16 1973-11-20 Chomerics Inc Pedestal and spring member for key actuator of diaphragm switch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4242546A (en) 1978-11-06 1980-12-30 International Telephone And Telegraph Corporation Electrical push-button switch
GB2133216A (en) * 1982-11-30 1984-07-18 Nippon Mektron Kk Keyboard switch

Also Published As

Publication number Publication date
US3911233A (en) 1975-10-07
FR2218636B1 (en) 1977-09-30
FR2218636A1 (en) 1974-09-13
IT1000056B (en) 1976-03-30
DE2345578A1 (en) 1974-09-05
NL7312430A (en) 1974-08-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee