EP0119418A2 - Installation de clavier à interrupteurs - Google Patents

Installation de clavier à interrupteurs Download PDF

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Publication number
EP0119418A2
EP0119418A2 EP84101043A EP84101043A EP0119418A2 EP 0119418 A2 EP0119418 A2 EP 0119418A2 EP 84101043 A EP84101043 A EP 84101043A EP 84101043 A EP84101043 A EP 84101043A EP 0119418 A2 EP0119418 A2 EP 0119418A2
Authority
EP
European Patent Office
Prior art keywords
switch according
key switch
carrier
switching element
following
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Withdrawn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
EP84101043A
Other languages
German (de)
English (en)
Other versions
EP0119418A3 (fr
Inventor
Heinz Burgeth
Georg Dipl.-Ing. Leitner
Joachim Wolf
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.)
Telefunken Electronic GmbH
Original Assignee
Telefunken Electronic GmbH
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 Telefunken Electronic GmbH filed Critical Telefunken Electronic GmbH
Publication of EP0119418A2 publication Critical patent/EP0119418A2/fr
Publication of EP0119418A3 publication Critical patent/EP0119418A3/fr
Withdrawn legal-status Critical Current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
    • H01H13/702—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
    • H01H2205/00—Movable contacts
    • H01H2205/032—Several contacts formed in one plate or layer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2207/00—Connections
    • H01H2207/008—Adhesive means; Conductive adhesive
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/002—Legends replaceable; adaptable
    • H01H2219/01—Liquid crystal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/004—High frequency adaptation or shielding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/01—Miscellaneous combined with other elements on the same substrate

Definitions

  • the invention relates to a key switch device according to the preamble of the first claim.
  • a film with printed conductor tracks and switch contact surfaces is provided on a carrier.
  • a cover plate with molded switching domes and conductors applied to the inside covers the cover plate in such a way that the switching domes lie in the area of the openings or the switching contact surfaces.
  • the conductor tracks are routed to freely accessible plug contact surfaces, via which external switching elements arranged in a housing accommodating the pushbutton switch can be connected.
  • the invention has for its object to provide a push button switch according to the preamble of the first claim, which in addition to the simple on-off switching operations also enables additional functions such as decoupling or debouncing of individual switch contact paths, processing and output of input data and thereby as a unit is trained.
  • switching elements can be assigned to the individual contacts on the carrier receiving these contacts, which bring technical intelligence with respect to the switching process.
  • decoupling diodes When decoupling diodes are used, reliable signal detection is guaranteed even when several buttons are pressed. Since these decoupling diodes can be connected directly to the conductor tracks of the carrier, a considerable reduction in the switching capacities is achieved, which would otherwise be unavoidable due to long external leads. This also increases reliability and reduces manufacturing costs.
  • debounce circuits or circuits for evaluating, processing and outputting data entered via the contact areas can also be connected directly to the carrier and the conductor tracks provided thereon as switching elements. According to an advantageous embodiment, these switching elements are designed as film switching elements.
  • a spacer can be placed on the side of the carrier occupied by the conductor tracks and the switching elements, which has appropriately dimensioned openings in the area of the switching contact surfaces and in the area of the switching elements.
  • a cover plate to be placed thereon which can optionally be provided with counter contacts, is then evenly supported over its surface.
  • the cover plate can simultaneously form a mechanical protection for the sensitive film switching elements, so that mechanical forces or moisture cannot act on it.
  • the breakthroughs surrounding the film switching elements can also serve as a pouring border for casting resin to be poured in.
  • Switch contact surfaces 2 and conductor tracks 3 are applied to a carrier 1, which can be designed as a film.
  • the contact surfaces 2 arranged in pairs are arranged at a distance from one another as is required for safe manual operation.
  • Switching elements 4, 5, 6 are also placed on the side of the carrier 1 provided with the switching contact surfaces 2, the switching element 4 being able to contain, for example, decoupling diodes and debouncing circuit means, while the switching element 5 can be a processor with input and output lines, which can be the LCD or controls another display element 6.
  • individual switching contact surfaces 2 or switching elements 4, 5, 6 can lead to connecting surfaces which are to be connected to external switching elements.
  • the switching elements 4, 5, 6 are designed as film switching elements and therefore have a height that is only a tenth of a millimeter. Due to the low height of the film switching elements 4, 5, 6, the carrier 1 can have correspondingly shaped recesses which accommodate these film switching elements. However, in order not to reduce the stability of the carrier 1, the film switching elements 4, 5, 6 are placed on the side provided with the conductor tracks 3 and fixed thereon. This can be done by connecting the corresponding conductor tracks to the connections of the film switching elements, for which purpose electrically conductive adhesives can be used. However, the bonder technique can also be used, in which the electrical connection is made via thin wires.
  • the film switching elements 4, 5, 6 are then arranged at a mutual distance from one another, so that openings 8 adapted to the individual film switching elements with interposed webs 9 can be provided in a cover plate 7 to be placed on the carrier.
  • the thickness of the cover plate 7 is preferably somewhat larger than that of the film switching elements 4, 5, 6, so that a cover plate 10 to be placed on the spacer plate 7 which can be loaded with compressive forces, cannot act on the film switching elements.
  • the cover disk -10 is provided with switching tabs 11 which are congruent with the switching contact surfaces 2 arranged in pairs.
  • recesses 12 are provided in the cover plate 7 in a corresponding arrangement.
  • the spacer 7 as the cover 10 are preferably also formed as films. The spacer 7 not only fulfills the purpose of electrically isolating the switching tabs 11 with their mating contacts and, if appropriate, conductor tracks provided therefor from the conductor tracks 3 and the switching contact surfaces 2, it also serves to relieve the film switching elements 4, 5, 6 from mechanical pressure forces, that act on the cover plate 10.
  • the openings 8 in the spacer 7 also act as a casting mold if the film switching elements are fixed on the carrier 1 by casting resin.
  • the casting resin In the area of the optical switching element 6, it is expedient to leave the casting resin on its side surface facing away from the carrier 1, because the readability is then increased by the transparent casting resin.
  • the casting resin can also be colored if the optical switching element 6 itself emits light and different light displays are to be achieved with several displays.
  • the transparent cover plate is preferably placed on the still liquid casting resin in order to avoid reflections on separating layers of media of different densities.
  • a cover plate 13 is placed, moreover, which is formed with elastic outward depressible and preferably equipped with a snap function switching domes 14 in the area of the switching tabs 11.
  • the one-piece cover plate 13 shields the switching paths 2, 11 and the film switching elements 4, 5, 6 from moisture and dirt and can be provided with signs that provide information about the function of the respective switching path.
  • processing functions can be carried out via the film switching element equipped with a microprocessor 5 or computing processes can be carried out which transmit corresponding control signals to the downstream outer switching elements.
  • the pushbutton switch can not only emit simple on-off switching signals of the individual contact arrangements 2, 11, but already prepared switching signals which are otherwise only achieved via switching devices connected externally.

Landscapes

  • Push-Button Switches (AREA)
  • Electronic Switches (AREA)
EP84101043A 1983-02-18 1984-02-02 Installation de clavier à interrupteurs Withdrawn EP0119418A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3305619A DE3305619A1 (de) 1983-02-18 1983-02-18 Tastschalteinrichtung
DE3305619 1983-02-18

Publications (2)

Publication Number Publication Date
EP0119418A2 true EP0119418A2 (fr) 1984-09-26
EP0119418A3 EP0119418A3 (fr) 1987-01-07

Family

ID=6191177

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84101043A Withdrawn EP0119418A3 (fr) 1983-02-18 1984-02-02 Installation de clavier à interrupteurs

Country Status (4)

Country Link
US (1) US4558191A (fr)
EP (1) EP0119418A3 (fr)
JP (1) JPS59154719A (fr)
DE (1) DE3305619A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2571889A1 (fr) * 1984-10-12 1986-04-18 Thomson Csf Clavier de commande avec protection electromagnetique et armoire electronique comportant un tel clavier
DE3905657A1 (de) * 1989-02-24 1990-08-30 Telefunken Electronic Gmbh Flexible traegerfolie
WO1995012207A1 (fr) * 1993-10-28 1995-05-04 Oticon A/S Dispositif de contact electrique et prothese auditive dotee de ce dernier

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5968037A (ja) * 1982-09-21 1984-04-17 Canon Inc 入力装置
JPS61178224U (fr) * 1985-04-25 1986-11-07

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2427335A1 (de) * 1973-06-06 1975-01-02 Sharp Kk Tragbarer elektronischer rechner
DE7803964U1 (de) * 1977-02-22 1978-06-22 Chomerics, Inc., Woburn, Mass. (V.St.A.) Tastatur mit konkaven und konvexen Kuppen
GB2068643A (en) * 1980-02-04 1981-08-12 Rogers Corp Electric switch assembly and keyboard device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5024770A (fr) * 1973-07-05 1975-03-17
DE2540011C3 (de) * 1974-09-09 1979-08-23 Sharp K.K., Osaka (Japan) Elektronischer Rechner
JPS5237744A (en) * 1975-09-19 1977-03-23 Seiko Epson Corp Electronic desk computer with liquid crystal display

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2427335A1 (de) * 1973-06-06 1975-01-02 Sharp Kk Tragbarer elektronischer rechner
DE7803964U1 (de) * 1977-02-22 1978-06-22 Chomerics, Inc., Woburn, Mass. (V.St.A.) Tastatur mit konkaven und konvexen Kuppen
GB2068643A (en) * 1980-02-04 1981-08-12 Rogers Corp Electric switch assembly and keyboard device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2571889A1 (fr) * 1984-10-12 1986-04-18 Thomson Csf Clavier de commande avec protection electromagnetique et armoire electronique comportant un tel clavier
DE3905657A1 (de) * 1989-02-24 1990-08-30 Telefunken Electronic Gmbh Flexible traegerfolie
WO1995012207A1 (fr) * 1993-10-28 1995-05-04 Oticon A/S Dispositif de contact electrique et prothese auditive dotee de ce dernier

Also Published As

Publication number Publication date
JPS59154719A (ja) 1984-09-03
DE3305619A1 (de) 1984-08-23
EP0119418A3 (fr) 1987-01-07
US4558191A (en) 1985-12-10

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Effective date: 19881222

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18D Application deemed to be withdrawn

Effective date: 19890829

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WOLF, JOACHIM

Inventor name: BURGETH, HEINZ

Inventor name: LEITNER, GEORG, DIPL.-ING.