EP0347375A1 - Disposition de boutons-poussoir sur une plaque à circuit - Google Patents

Disposition de boutons-poussoir sur une plaque à circuit Download PDF

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Publication number
EP0347375A1
EP0347375A1 EP89810409A EP89810409A EP0347375A1 EP 0347375 A1 EP0347375 A1 EP 0347375A1 EP 89810409 A EP89810409 A EP 89810409A EP 89810409 A EP89810409 A EP 89810409A EP 0347375 A1 EP0347375 A1 EP 0347375A1
Authority
EP
European Patent Office
Prior art keywords
circuit board
snap
printed circuit
push button
spacer
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.)
Granted
Application number
EP89810409A
Other languages
German (de)
English (en)
Other versions
EP0347375B1 (fr
Inventor
Dieter Limberger
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.)
Elma Electronic AG
Original Assignee
Elma Electronic 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=4229866&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0347375(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Elma Electronic AG filed Critical Elma Electronic AG
Publication of EP0347375A1 publication Critical patent/EP0347375A1/fr
Application granted granted Critical
Publication of EP0347375B1 publication Critical patent/EP0347375B1/fr
Anticipated expiration legal-status Critical
Revoked 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
    • H01H13/70—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/01—Increasing rigidity; Anti-creep
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2213/00—Venting
    • H01H2213/002—Venting with external pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/002—Legends replaceable; adaptable
    • H01H2219/014—LED
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/064—Limitation of actuating pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/07—Actuators transparent
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2227/00—Dimensions; Characteristics
    • H01H2227/002—Layer thickness
    • H01H2227/006—Spacer

Definitions

  • the invention relates to a push button arrangement on a printed circuit board.
  • the switch contact is generated via a snap disk which is embedded in a spacer and is protected against external attack by a cover.
  • Pushbutton arrangements are known in which the switch contact is generated directly on the conductor tracks of a printed circuit board via a snap disk.
  • the circuit board is covered with a spacer, which has recesses for embedding these snap disks.
  • a cover film is pulled over the recessed snap disks to secure them in the associated cutouts and to protect them from dirt.
  • the contact is actuated by hand in that the snap disk is usually pressed down with a finger through the elastic cover film. In this version, the cover film can be deformed as far as the cavities under the cover film allow.
  • arrangements are known in which individual pushbuttons, which are provided with protective caps, are placed as separate switches on the printed circuit board, which necessitates an undesired greater overall height and additional electrical connections, such as solder joints, for example.
  • the first-mentioned arrangement is characterized by its low overall height.
  • the partially hollow cover film is exposed to enormous loads, which can damage the cover film if the snap disk is not operated in the center or with a pointed object.
  • the snap disc can also be plastically deformed. Body contact to the electrical potential of the snap disk is possible through the damaged cover film, which on the one hand can lead to damage to sensitive electronic components due to static charges and on the other hand is unreasonable for the operating personnel.
  • the object on which the invention is based is to provide pushbutton fields in printed circuit boards which are protected against mechanical damage and against contact with the electrical potential of the switch contact. According to the invention, this object is achieved in that the spacer consists of the same or similar material as the printed circuit board, and that the snap disk is completely covered by a transparent protective cap.
  • the invention thus makes it possible, while maintaining a low overall height, to limit the operational loads on the cover foils and the snap disks in such a way that there are no strains and destruction. This prevents additional contamination of the switch contacts.
  • the snap disk is provided with at least two protruding tabs which engage in recesses in the printed circuit board.
  • the snap disk can be provided with cutouts and / or the printed circuit board with cutouts for the passage of light.
  • a pushbutton arrangement is shown in a printed circuit board, which in its basic structure consists of a printed circuit board 1 with printed conductors 6 and a snap disk 5, which rests on the one hand on the printed conductors 6 and on the printed circuit board 1 and on the other hand in its movement from an overlapping one Protective cap 4 is limited, which is held by a cover sheet 3 in a recess of the spacer 2.
  • the spacer 2 which is provided with cutouts, consists of a printed circuit board which is fixedly connected to the printed circuit board 1 via a binder and to the cover film 3 on the opposite side.
  • the deformation of the cover film 3 and the snap disc 5 is limited by the freedom of movement of the protective cap 4 lying in the recess of the spacer 2.
  • the position of the snap disk 5 is secured by two projecting tabs 11 which engage in the recesses 10 of the circuit board 1.
  • a light source 9 is attached, which illuminates the protective cap 4 and the cover film 3 through the recess 7 of the circuit board 1 and through the recess 8 on the snap disk 5.

Landscapes

  • Push-Button Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
EP19890810409 1988-06-14 1989-06-01 Disposition de boutons-poussoir sur une plaque à circuit Revoked EP0347375B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2271/88 1988-06-14
CH227188A CH676765A5 (fr) 1988-06-14 1988-06-14

Publications (2)

Publication Number Publication Date
EP0347375A1 true EP0347375A1 (fr) 1989-12-20
EP0347375B1 EP0347375B1 (fr) 1993-09-15

Family

ID=4229866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890810409 Revoked EP0347375B1 (fr) 1988-06-14 1989-06-01 Disposition de boutons-poussoir sur une plaque à circuit

Country Status (3)

Country Link
EP (1) EP0347375B1 (fr)
CH (1) CH676765A5 (fr)
DE (1) DE58905591D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4213084A1 (de) * 1992-04-21 1993-01-07 Bock Hans A Dipl Ing Tu (tast)schalter im lenkrad oder in konsolen, armlehnen etc. zur bedienung durch die "elastische haut" (kunststoff) der oberflaeche
EP0538199A3 (en) * 1991-10-14 1993-06-30 Fela Mikrotechnik Ag Electrical push botton switch
WO1999054900A1 (fr) * 1998-04-18 1999-10-28 Inovan Gmbh & Co. Kg Metalle Und Bauelemente Interrupteur sensible avec element de fixation
WO2000022639A1 (fr) * 1998-10-15 2000-04-20 Gustav Magenwirth Gmbh & Co. Commutateur a fonctionnement brusque
US6423918B1 (en) * 2000-03-21 2002-07-23 Lear Corporation Dome switch
EP1465118A3 (fr) * 2003-04-03 2005-10-05 Leopold Kostal GmbH & Co. KG Commande à distance permettant d'actionner le dispositif de verrouillage d'un véhicule automobile

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2280291A1 (fr) * 1974-07-24 1976-02-20 Amp Inc Ensemble electrique a plaque de circuit imprime
US4056701A (en) * 1976-07-08 1977-11-01 Bowmar Instrument Corporation Low profile lighted push button switch
FR2430658A1 (fr) * 1978-07-07 1980-02-01 Sodeco Compteurs De Geneve Clavier a boutons-poussoirs
FR2447598A1 (fr) * 1979-01-25 1980-08-22 Itt Commutateur a bouton poussoir
US4365120A (en) * 1981-04-13 1982-12-21 Kb Denver, Inc. Illuminated keyboard
DE3145434A1 (de) * 1981-11-16 1983-05-26 Kundisch GmbH, 7730 Villingen-Schwenningen Folientastatur mit druckpunkt

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2280291A1 (fr) * 1974-07-24 1976-02-20 Amp Inc Ensemble electrique a plaque de circuit imprime
US4056701A (en) * 1976-07-08 1977-11-01 Bowmar Instrument Corporation Low profile lighted push button switch
FR2430658A1 (fr) * 1978-07-07 1980-02-01 Sodeco Compteurs De Geneve Clavier a boutons-poussoirs
FR2447598A1 (fr) * 1979-01-25 1980-08-22 Itt Commutateur a bouton poussoir
US4365120A (en) * 1981-04-13 1982-12-21 Kb Denver, Inc. Illuminated keyboard
DE3145434A1 (de) * 1981-11-16 1983-05-26 Kundisch GmbH, 7730 Villingen-Schwenningen Folientastatur mit druckpunkt

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0538199A3 (en) * 1991-10-14 1993-06-30 Fela Mikrotechnik Ag Electrical push botton switch
DE4213084A1 (de) * 1992-04-21 1993-01-07 Bock Hans A Dipl Ing Tu (tast)schalter im lenkrad oder in konsolen, armlehnen etc. zur bedienung durch die "elastische haut" (kunststoff) der oberflaeche
WO1999054900A1 (fr) * 1998-04-18 1999-10-28 Inovan Gmbh & Co. Kg Metalle Und Bauelemente Interrupteur sensible avec element de fixation
WO2000022639A1 (fr) * 1998-10-15 2000-04-20 Gustav Magenwirth Gmbh & Co. Commutateur a fonctionnement brusque
US6423918B1 (en) * 2000-03-21 2002-07-23 Lear Corporation Dome switch
EP1465118A3 (fr) * 2003-04-03 2005-10-05 Leopold Kostal GmbH & Co. KG Commande à distance permettant d'actionner le dispositif de verrouillage d'un véhicule automobile

Also Published As

Publication number Publication date
DE58905591D1 (de) 1993-10-21
CH676765A5 (fr) 1991-02-28
EP0347375B1 (fr) 1993-09-15

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