EP0392973B1 - Drucktaste an Leiterplatte - Google Patents

Drucktaste an Leiterplatte Download PDF

Info

Publication number
EP0392973B1
EP0392973B1 EP90810173A EP90810173A EP0392973B1 EP 0392973 B1 EP0392973 B1 EP 0392973B1 EP 90810173 A EP90810173 A EP 90810173A EP 90810173 A EP90810173 A EP 90810173A EP 0392973 B1 EP0392973 B1 EP 0392973B1
Authority
EP
European Patent Office
Prior art keywords
contact
board
tabs
key according
snap disc
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 - Lifetime
Application number
EP90810173A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0392973A1 (de
Inventor
Peter Rothlin
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.)
Sulzer AG
Original Assignee
Sulzer AG
Gebrueder Sulzer AG
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 Sulzer AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Publication of EP0392973A1 publication Critical patent/EP0392973A1/de
Application granted granted Critical
Publication of EP0392973B1 publication Critical patent/EP0392973B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01H13/02—Details
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/48—Snap-action arrangements depending upon deformation of elastic members using buckling of disc springs
    • 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
    • H01H13/7006—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 comprising a separate movable contact element for each switch site, all other elements being integrated in layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2205/00—Movable contacts
    • H01H2205/016—Separate bridge contact
    • H01H2205/024—Means to facilitate positioning
    • H01H2205/03—Apertured plate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2215/00—Tactile feedback
    • H01H2215/034—Separate snap action
    • H01H2215/036—Metallic disc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2225/00—Switch site location
    • H01H2225/012—Switch site location normally closed

Definitions

  • the invention relates to a pushbutton on printed circuit boards with an electrically conductive snap disk which is embedded in a recess in a spacer layer between a cover film and the printed circuit board coated with conductor tracks.
  • FR-A-2 447 598 shows various forms of film pushbuttons, in which the partly moved conductor tracks are applied to deformable films, and conveys the principle of an opener in the form of a spiral spring clamped in by a film coated with a conductor track is lifted from its support on this conductor track.
  • Breaker buttons have the task of interrupting circuits with a direct effect for safety reasons. They must be characterized by a long service life and operational safety and must not cause incorrect switching due to shocks and vibrations. They are almost always used right next to the closing pushbuttons. Although pushbuttons have been used as closers for several years Membrane keyboards are used, there are hardly any equivalent designs for Openers. The object of the invention is therefore to create a pushbutton that is equivalent or better to be closed for membrane keyboards.
  • the figures show a pushbutton on a printed circuit board 1 with an electrically conductive snap disk 4, which is embedded in a recess in a spacer layer 2 between a cover film 3 and the printed circuit board 1 coated with conductor tracks 7.
  • the snap disk 4 has mutually offset contact tabs 5 and pull tabs 6, the draw tabs are anchored to the snap disk 4 on the printed circuit board 1 under tension and the contact tabs form an elastic yoke.
  • the contact tabs 5 are pretensioned on the conductor tracks 7 and, between the contact surface 8 and the disk plate 10, have a support knee 9 curved toward the printed circuit board 1.
  • the necessary actuating force When the snap disk 4 is pressed down in the actuating direction d, the necessary actuating force initially grows in an area 1 Fa and the contact force Fc until the support knee 9 is supported on the circuit board 1. Due to the shortened leverage between the support knee 9 and the disc plate 10, the necessary actuating force rises more steeply in an area II, the area between the support knee 9 and the disc plate 10 elastically deflecting, the knees originally preloaded from the contact surface 8 slidingly performing a pivoting movement and the contact force Fc decreases until the contact surface 8 lifts off the conductor track 7.
  • the resilient elements are dimensioned and matched to the height of the conductor track 7 in the area of the contact area 8 such that the contact areas 8 at the latest when the peak value for the actuating force Fa is reached.
  • the actuating force Fa initially decreases with progressive deformation in the actuating direction d until the snap disk plate is also seated on the printed circuit board and opposes substantially greater resistance, which protects the other snap disk areas from excessive stress.
  • the contact force Fa in the unactuated state depends on the pretension of the pull tabs 6, which center the snap disk on the one hand and on the other hand are guided in a preferred embodiment through recesses 11 in the printed circuit board 1 and are latched with protruding bends on the back of the printed circuit board 1. Other mounting options respectively. Abutments result from casting around, gluing or pressing on the pull tabs.
  • the play between the snap disk 4 and the cover sheet 3 is once with negative play, i.e. Overlap, used to increase the contact force Fc in the unactuated state and, on the other hand, serves to center the actuating finger when there is positive play.
  • a preferred application for the breaker buttons described is in gas refueling devices for motor vehicles.

Landscapes

  • Push-Button Switches (AREA)
EP90810173A 1989-04-10 1990-03-07 Drucktaste an Leiterplatte Expired - Lifetime EP0392973B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1344/89 1989-04-10
CH1344/89A CH677552A5 (enrdf_load_stackoverflow) 1989-04-10 1989-04-10

Publications (2)

Publication Number Publication Date
EP0392973A1 EP0392973A1 (de) 1990-10-17
EP0392973B1 true EP0392973B1 (de) 1994-02-23

Family

ID=4208285

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810173A Expired - Lifetime EP0392973B1 (de) 1989-04-10 1990-03-07 Drucktaste an Leiterplatte

Country Status (7)

Country Link
US (1) US4978818A (enrdf_load_stackoverflow)
EP (1) EP0392973B1 (enrdf_load_stackoverflow)
AU (1) AU631858B2 (enrdf_load_stackoverflow)
CA (1) CA2014135A1 (enrdf_load_stackoverflow)
CH (1) CH677552A5 (enrdf_load_stackoverflow)
DE (1) DE59004650D1 (enrdf_load_stackoverflow)
NZ (1) NZ232888A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008063732A1 (de) * 2008-12-18 2010-06-24 Siemens Aktiengesellschaft Folientaster

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19621192A1 (de) * 1996-05-25 1997-11-27 Abb Patent Gmbh Niederspannungsschaltgerät
FR2755534B1 (fr) * 1996-11-06 1998-12-11 Apem Element formant bouton-poussoir electrique
US5898147A (en) * 1997-10-29 1999-04-27 C & K Components, Inc. Dual tact switch assembly
DE19816956C1 (de) * 1998-04-17 1999-10-07 Inovan Stroebe Schnappscheibenschalter mit vergrößertem Kontaktweg
DE19823894C1 (de) * 1998-04-18 2000-01-05 Inovan Stroebe Schnappscheibenschalter mit Befestigungselement
US6423918B1 (en) * 2000-03-21 2002-07-23 Lear Corporation Dome switch
SG100707A1 (en) * 2000-06-07 2003-12-26 Ebauchesfabrik Eta Ag Control device with a snap function and watch fitted therewith
FR2841037B1 (fr) * 2002-06-13 2004-11-26 Itt Mfg Enterprises Inc Commutateur electrique miniaturise a effet tactile du type normalement ferme
TW572345U (en) * 2003-06-23 2004-01-11 Emi Stop Corp Elastic sheet of ingle-piece circuit switch
DE102005041029B4 (de) * 2005-08-23 2007-09-06 Prettl, Rolf Gurtschloss für Sicherheitsgurte
US7700890B2 (en) * 2008-01-15 2010-04-20 Research In Motion Limited Key dome assembly with improved tactile feedback
FR2937789B1 (fr) * 2008-10-28 2010-12-31 Thales Sa Clavier a longue course de touches et a sensation tactile amelioree
KR20170022567A (ko) * 2015-08-21 2017-03-02 삼성전자주식회사 컨택 구조 및 이를 포함하는 컨택 장치와 전자 장치
CN107615432B (zh) * 2015-09-30 2020-05-22 阿尔卑斯阿尔派株式会社 按压开关

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2415448A (en) * 1942-06-05 1947-02-11 Pierce John B Foundation Snap switch
US4163125A (en) * 1971-06-01 1979-07-31 Texas Instruments Incorporated Pushbutton keyboard system
BE795425A (fr) * 1972-11-20 1973-05-29 Texas Instruments Inc Systeme perfectionne de clavier a boutons-poussoirs
US3941964A (en) * 1974-12-09 1976-03-02 Bowmar Instrument Corporation Push-button type binary switch device
US3996428A (en) * 1975-03-17 1976-12-07 Litronix, Inc. Pushbutton keyboard assembly with over center diaphragm contact
US4029916A (en) * 1975-04-18 1977-06-14 Northern Electric Company Limited Multi-contact push-button switch and plural embodiment for keyboard switch assembly
US4084071A (en) * 1976-12-06 1978-04-11 Rca Corporation Switch mechanism for a calculator type keyboard
DE3145434A1 (de) * 1981-11-16 1983-05-26 Kundisch GmbH, 7730 Villingen-Schwenningen Folientastatur mit druckpunkt
DE3226008C2 (de) * 1982-07-12 1984-07-19 Siemens AG, 1000 Berlin und 8000 München Schaltvorrichtung für Kontakte auf einem Träger
SU1332401A1 (ru) * 1985-06-07 1987-08-23 Предприятие П/Я М-5339 Коммутационное устройство
US4778952A (en) * 1987-04-23 1988-10-18 Eaton Corporation Key switch assembly
JPH0221825A (ja) * 1989-05-24 1990-01-24 Iseki Foods Eng Co Ltd 連続蒸煮炊飯装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008063732A1 (de) * 2008-12-18 2010-06-24 Siemens Aktiengesellschaft Folientaster

Also Published As

Publication number Publication date
AU631858B2 (en) 1992-12-10
DE59004650D1 (de) 1994-03-31
NZ232888A (en) 1993-04-28
CH677552A5 (enrdf_load_stackoverflow) 1991-05-31
US4978818A (en) 1990-12-18
EP0392973A1 (de) 1990-10-17
AU5299390A (en) 1990-10-11
CA2014135A1 (en) 1990-10-10

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