EP0486388A1 - Schalterstruktur verwendbar für die Herstellung von Tastaturen und Tastaturen, bei denen eine solche Struktur angewendet wird - Google Patents

Schalterstruktur verwendbar für die Herstellung von Tastaturen und Tastaturen, bei denen eine solche Struktur angewendet wird Download PDF

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Publication number
EP0486388A1
EP0486388A1 EP91403048A EP91403048A EP0486388A1 EP 0486388 A1 EP0486388 A1 EP 0486388A1 EP 91403048 A EP91403048 A EP 91403048A EP 91403048 A EP91403048 A EP 91403048A EP 0486388 A1 EP0486388 A1 EP 0486388A1
Authority
EP
European Patent Office
Prior art keywords
boss
fixed contacts
transmission part
substrate
membrane
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.)
Ceased
Application number
EP91403048A
Other languages
English (en)
French (fr)
Inventor
Michel Gouet
Gilles Rabault
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.)
SYRELEC
Original Assignee
SYRELEC
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 SYRELEC filed Critical SYRELEC
Publication of EP0486388A1 publication Critical patent/EP0486388A1/de
Ceased 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
    • H01H2215/00—Tactile feedback
    • H01H2215/004—Collapsible dome or bubble
    • H01H2215/006—Only mechanical function
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2215/00—Tactile feedback
    • H01H2215/004—Collapsible dome or bubble
    • H01H2215/016—Collapsing to second stable position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/002—Actuators integral with membrane
    • 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

Definitions

  • the present invention relates to a switch structure which can be used in particular, but not exclusively, for the production of waterproof keypads, of small thickness and with tactile effect.
  • the mechanical properties of the plastic sheet as well as the thickness of the intermediate piece are determined so that at rest, the conductive areas of the sheet are kept away from the contacts of the substrate and that a connection electrical contact between a couple of fixed contacts is only ensured by a corresponding conductive pad following a voluntary pressure exerted on the area serving as the corresponding button.
  • the invention therefore more particularly aims to eliminate these drawbacks.
  • the apparatus comprises a parallelepipedal box 1, the front wall 2 of which is provided with a viewing area 3 constituted, for example, by a liquid crystal cell, and a keyboard 4 situated in the interval included between area 3 and the front edge 5 of the housing 1.
  • This keyboard here comprises four keys 6 to 9 aligned along an axis parallel to the edge 5.
  • Each of the keys 6 to 9 is identified by a functional symbol, here the + and - signs, as well as a vertical arrow and a horizontal arrow.
  • this keyboard 4 involves a substrate fixedly mounted inside the housing 1 and which here consists of the printed circuit 10 of the device.
  • This printed circuit 10 comprises, in areas located in the axis of the keys 6 to 9, four pairs of respective conductive pads C, C ', each pair of pads constituting the fixed contacts of a switch associated with the corresponding key.
  • This free volume is partially occupied by a part 14 of conductive elastomer, the lower face of which extends parallel and at a determined distance from the printed circuit 10, this part 14, of cylindrical shape, being fixed on the internal surface of the boss 13, at the bottom.
  • the upper part of the bosses 13 is extended by a coaxial cylindrical part 15 which fulfills the function of the said transmission part.
  • each of these cylindrical parts 15 engages in a coaxial bore 16 provided in the front wall 2 of the housing 1 and ends in a convex face 17 situated slightly above the plane of the external face of said wall 2 .
  • Each hole 16 comprises towards the outside a flared part 18, of conical shape whose external diameter is substantially equal to the side of a key 6 to 9.
  • the outer face of the front wall 2 of the housing 1 is covered (in the part constituting the keyboard) by a sheet of semi-rigid plastic material 20, for example polycarbonate.
  • this sheet includes bosses 21 in the form of a cap, on the internal faces of which the curved ends 17 of the cylindrical parts 15 are applied.
  • the membrane 13 occupies the position indicated in FIG. 2, the parts 14 of conductive elastomer being spaced from the conductive pads C, C '.
  • the resistant force generated by the deformation of the boss 21 of the sheet 20 is first increasing in the first part of the stroke, then abruptly vanishes as a result of the inversion of concavity of the boss 21, producing thus the desired tactile effect.
  • the conductive elastomer 14 is applied to the conductive pads C, C ′ by establishing an electrical contact between these two pads.
  • This contact is of good quality because of the guidance provided by the cylindrical part 15 and thanks to the properties of the conductive elastomer of the part 14.
  • the cylindrical part 15 and, optionally, the part 14 of conductive elastomer are compressed elastically while storing potential energy.

Landscapes

  • Push-Button Switches (AREA)
EP91403048A 1990-11-16 1991-11-14 Schalterstruktur verwendbar für die Herstellung von Tastaturen und Tastaturen, bei denen eine solche Struktur angewendet wird Ceased EP0486388A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9014678 1990-11-16
FR9014678A FR2669462B1 (fr) 1990-11-16 1990-11-16 Structure d'interrupteur utilisable pour la realisation de claviers, et claviers utilisant une telle structure.

Publications (1)

Publication Number Publication Date
EP0486388A1 true EP0486388A1 (de) 1992-05-20

Family

ID=9402545

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91403048A Ceased EP0486388A1 (de) 1990-11-16 1991-11-14 Schalterstruktur verwendbar für die Herstellung von Tastaturen und Tastaturen, bei denen eine solche Struktur angewendet wird

Country Status (3)

Country Link
EP (1) EP0486388A1 (de)
DE (1) DE486388T1 (de)
FR (1) FR2669462B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1389789A1 (de) * 2002-08-08 2004-02-18 TRW Automotive Electronics & Components GmbH & Co. KG Mehrfach-Tastschalter
DE102007035923A1 (de) * 2007-07-23 2009-02-05 Silcos Gmbh Bedienelement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0123184A2 (de) * 1983-04-20 1984-10-31 Bebié+Co. Tastaturanordnung
DE3407937A1 (de) * 1984-03-03 1985-09-12 Debeg GmbH, 2000 Hamburg Geraeteeingabetastatur mit mechanisch betaetigbaren, fuehlbaren betaetigungselementen
US4734679A (en) * 1986-06-12 1988-03-29 Northern Telecom Limited Pushbutton keyboard assembly
DE8908815U1 (de) * 1989-07-20 1989-08-31 Asea Brown Boveri Ag, 6800 Mannheim, De
FR2647588A1 (fr) * 1989-05-23 1990-11-30 Moulinex Sa Clavier interrupteur pour tableau de commande d'un appareil electrique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0123184A2 (de) * 1983-04-20 1984-10-31 Bebié+Co. Tastaturanordnung
DE3407937A1 (de) * 1984-03-03 1985-09-12 Debeg GmbH, 2000 Hamburg Geraeteeingabetastatur mit mechanisch betaetigbaren, fuehlbaren betaetigungselementen
US4734679A (en) * 1986-06-12 1988-03-29 Northern Telecom Limited Pushbutton keyboard assembly
FR2647588A1 (fr) * 1989-05-23 1990-11-30 Moulinex Sa Clavier interrupteur pour tableau de commande d'un appareil electrique
DE8908815U1 (de) * 1989-07-20 1989-08-31 Asea Brown Boveri Ag, 6800 Mannheim, De

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1389789A1 (de) * 2002-08-08 2004-02-18 TRW Automotive Electronics & Components GmbH & Co. KG Mehrfach-Tastschalter
US6888079B2 (en) 2002-08-08 2005-05-03 Trw Automotive Electronics & Components Gmbh & Co. Kg Multifunctional pushbutton switch
DE102007035923A1 (de) * 2007-07-23 2009-02-05 Silcos Gmbh Bedienelement
DE102007035923B4 (de) * 2007-07-23 2011-12-29 Silcos Gmbh Bedienelement

Also Published As

Publication number Publication date
DE486388T1 (de) 1992-10-15
FR2669462A1 (fr) 1992-05-22
FR2669462B1 (fr) 1994-04-01

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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ITCL It: translation for ep claims filed

Representative=s name: ING. A. GIAMBROCONO & C. S.R.L.

GBC Gb: translation of claims filed (gb section 78(7)/1977)
DET De: translation of patent claims
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