EP0073932B1 - Interrupteur à touche - Google Patents

Interrupteur à touche Download PDF

Info

Publication number
EP0073932B1
EP0073932B1 EP82107034A EP82107034A EP0073932B1 EP 0073932 B1 EP0073932 B1 EP 0073932B1 EP 82107034 A EP82107034 A EP 82107034A EP 82107034 A EP82107034 A EP 82107034A EP 0073932 B1 EP0073932 B1 EP 0073932B1
Authority
EP
European Patent Office
Prior art keywords
contact
tongue
push
button switch
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
EP82107034A
Other languages
German (de)
English (en)
Other versions
EP0073932A1 (fr
Inventor
Heinz Burgeth
Günter Ing. grad. Tessendorf
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
Priority to AT82107034T priority Critical patent/ATE16870T1/de
Publication of EP0073932A1 publication Critical patent/EP0073932A1/fr
Application granted granted Critical
Publication of EP0073932B1 publication Critical patent/EP0073932B1/fr
Expired 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
    • H01H13/7013—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 in which the movable contacts of each switch site or of a row of switch sites are formed in a single plate

Definitions

  • the invention relates to a push button switch according to the preamble of claim 1.
  • a contact carrier with contacts is provided, on which a spacer film with recesses adapted to the contacts rests.
  • a film of elastic, electrically insulating material runs parallel to the spacer film and is provided with a counter contact in the region of each contact.
  • the film is provided on one side with an elastic metal covering and has punched-out tabs which, as movable counter-contacts, face the contacts on the contact carrier and are permanently bent at an acute angle at their base in relation to the plane of the film.
  • the metal covering is on the side of the film after which the tabs are bent. The tabs thus incline towards the contact carrier.
  • the interposed spacer foil In order to ensure a sufficient distance between the contacts and the counter-contacts formed by the metal layer, the interposed spacer foil must be as thick as is dictated by the required contact spacing and the height by which the tabs protrude from the plane of the foil. As a result, the overall height of the pushbutton switch is increased accordingly and to actuate the tabs which are recessed in the film, correspondingly long switching plungers are required, for which a corresponding mechanical guidance is also necessary.
  • the electrical metal covering also serves to generate a sufficient restoring force of the tabs.
  • a pushbutton switch is also known (IBM Technical Disclosure Bulletin, Vol. 16 No. 3August 1973, page 954), which has cup-like actuating elements in a cover film.
  • a projection is provided centrally within the cup-shaped actuating element, which sits on a snap element and thereby bridges the free space between the actuating surface of the actuating element and the snap element.
  • the snap element is designed as a bracket or dome and rests on contact pieces in the outer region. In the central, bulging area there is a counter-contact piece in the plane of the first-mentioned contact pieces, against which the snap element snaps when the actuating element is pressed.
  • individual snap elements and contact pieces must be provided, for which appropriate mechanical brackets and centering are required to ensure their mutual assignment.
  • the invention has for its object to take measures in a key switch according to the preamble of claim 1, which results in a small footprint.
  • the inner free space enclosed by the dome is used for accommodating the tab bent upwards.
  • a spacer film arranged between the film and the contact carrier can then be made so thin that only an electrical separation between conductor tracks on the contact carrier and the film is achieved or this spacer film can also be omitted if there is no mutual contact between the contact paths of the contact carrier and the film can occur because the required distance between the associated contact on the contact carrier and the mating contact on the film is established by the tab inclined away from the contact carrier.
  • the free switching stroke of the dome which is predetermined by the height of the space enclosed by the dome, can thus be used for depressing the tab towards the counter contact.
  • the dome forms a self-contained actuating element that does not require special guidance.
  • Contacts 2 arranged in pairs are located on a contact carrier 1 and can be connected to external connections via connecting lines (not shown).
  • a film 3 made of elastic material, from which 2 tabs 4 are punched out in the area of the contacts.
  • mating contacts 5 In the area of the free ends of the tabs 4 there are mating contacts 5, with which the respectively assigned contact pairs 2 can be bridged by pressing down the tabs 4.
  • On the film 3, which consists of electrically insulating plastic there is a cover film 6, in which dome-shaped actuating elements 7 are molded.
  • the actuating elements 7 are each assigned to a tab 4 and have a web 8 which extends from the edge of a round opening 9 encompassing the tab 4 in the cover sheet 6 covering the sheet 3 and is pulled up over the level of the cover sheet 6 and the tab 4 spreads.
  • the web 8 is pivotally attached above the foot 10 of the tab 4 connected to the film 3, the part of the web 8 overlapping the tab 4 being actuated surface 11 serves.
  • the web 8 is connected via a conical support skin 12 to the rest of the opening 9.
  • the support skin 12 brings about a dustproof and watertight closure in the region of the actuating element 7 and, particularly when the actuating element 7 is pressed down, causes a snap effect, as a result of which the contacts 2, 5 are switched to torque.
  • the film 3 made of insulating material lies directly on the contact carrier 1.
  • the tabs 4 are bent at their base 10 relative to the plane of the film 3 by permanent deformation at an acute angle so that the mating contacts 5 are lifted in an oblique position relative to the contacts 2 are.
  • a spacer film between the film 3 and the contact carrier 1 can be omitted, so that their manufacturing and assembly costs can be saved.
  • small bumps can also be provided on the contact carrier 1 in the area of the foot of each tab, which lifts the tab from the contacts 2 in the unactuated state.
  • the tab 4 engages in the dome of the actuating element 7, so that the path required for the switching stroke can also be used as a distance for the switching distance between the contacts 2 and the counter-contact 5. This means that no additional space is required.
  • a spacer film can be used between the film 3 and the contact carrier 1, which has cutouts in the area of the contacts 2, 5. As a result, a necessary distance between the contacts 2 and the counter contacts 5 can be ensured.
  • the tab 4 By depressing the actuating surface 11, which has an actuating nose 15 on its inside, the tab 4 is pressed against the assigned contacts 2 in the manner of a snap switch by the snap action of the dome-shaped actuating element 7 via the actuating nose 15. Due to the inherent elasticity of the film 3, the tab 4 then swings back into its initial position after the actuating element 7 is released.

Landscapes

  • Push-Button Switches (AREA)

Claims (6)

1. Interrupteur à touche comprenant un support de contacts (1), associé à une feuille (3), en matériau élastique électriquement isolant, qui comporte une languette élastique (4), découpée par estampage qui, au niveau de son pied (10) situé dans le plan de la feuille (3), est pliée en permanence de manière à former un angle aigu avec ce plan et porte un contre-contact (5) qui est soulevé au-dessus d'un contact (2) situé sur le porte-contacts (1), ainsi qu'un élément de commande réglable (7) situé au-dessus des contacts (2, 5), caractérisé en ce que l'élément de commande (7) a la forme d'un dôme et en ce que la languette élastique (4) est, dans la zone du contre-contact (5), soulevée au-dessus du support de contacts (1) et pliée pour pénétrer dans la partie en forme de dôme.
2. Interrupteur à touche selon la revendication 1, caractérisé en ce que la feuille isolante (3) est posée directement sur le support de contacts (1) et en ce que le contre-contact (5) est situé vers l'extrémité libre de la languette (4) et se trouve en face d'un couple de contacts (2) correspondants.
3. Interrupteur à touche selon l'une des revendications 1 ou 2, caractérisé en ce qu'il comprend, orientée dans la direction de la languette (4), une partie (8) de l'élément de commande (7) qui peut pivoter au-dessus du pied (10) de la languette (4), se termine au-dessus de l'extrémité libre de la languette (4) et comporte une surface de commande (11).
4. Interrupteur à touche selon la revendications 3, caractérisé en ce que la partie (8) part du bord d'une ouverture ronde (9) ménagée dans la feuille de couverture (6) et entourant la languette (4) et s'élève au-dessus du plan de la feuille de couverture (6).
5. Interrupteur à touche selon la revendication 4, caractérisé en ce que la partie (8) est reliée par une pellicule d'appui (12) en forme de cône au reste du bord de l'ouverture (9).
6. Interrupteur à touche selon l'une des revendications 1 à 5, caractérisé en ce qu'il comporte, dans la zone du pied (10) de la languette (4), une partie saillante qui écarte la languette (4) du contact (2) lorsqu'on n'agit pas sur elle.
EP82107034A 1981-09-08 1982-08-04 Interrupteur à touche Expired EP0073932B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82107034T ATE16870T1 (de) 1981-09-08 1982-08-04 Tastenschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3135427 1981-09-08
DE3135427A DE3135427C2 (de) 1981-09-08 1981-09-08 Tastschalter

Publications (2)

Publication Number Publication Date
EP0073932A1 EP0073932A1 (fr) 1983-03-16
EP0073932B1 true EP0073932B1 (fr) 1985-12-04

Family

ID=6141074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82107034A Expired EP0073932B1 (fr) 1981-09-08 1982-08-04 Interrupteur à touche

Country Status (3)

Country Link
EP (1) EP0073932B1 (fr)
AT (1) ATE16870T1 (fr)
DE (1) DE3135427C2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3403034A1 (de) * 1984-01-28 1985-08-01 Schoeller & Co Elektrotechnische Fabrik Gmbh & Co, 6000 Frankfurt Tastenschalter
DE3734021C2 (de) * 1987-10-08 1996-11-14 Telefunken Microelectron Verfahren zur Herstellung von Tastschaltern
DE102011122862B3 (de) * 2011-05-30 2018-11-15 Heraeus Deutschland GmbH & Co. KG Laminat zur Herstellung eines Schalters, Schalter sowie Laminatbahn mit Laminatelementen aus einem solchen Laminat und Verfahren zur Herstellung eines solchen Laminats
DE102011103598B4 (de) * 2011-05-30 2017-04-06 Heraeus Deutschland GmbH & Co. KG Laminat zur Herstellung eines Schalters

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3290439A (en) * 1963-04-29 1966-12-06 Willcox Data encoding keyboard
US3240885A (en) * 1963-05-07 1966-03-15 Western Electric Co Multiple switching apparatus
US3800104A (en) * 1972-11-13 1974-03-26 Becton Dickinson Co Low profile keyboard switch assembly with snap action cantilever contact
US4005293A (en) * 1974-11-29 1977-01-25 Texas Instruments Incorporated Pushbutton keyboard switch assembly having individual concave-convex contacts integrally attached to conductor strips
NL7700721A (nl) * 1976-03-17 1977-09-20 Tektronix Inc Schakelinrichting.
US4078257A (en) * 1976-08-23 1978-03-07 Hewlett-Packard Company Calculator apparatus with electronically alterable key symbols
US4128744A (en) * 1977-02-22 1978-12-05 Chomerics, Inc. Keyboard with concave and convex domes
JPS6050590B2 (ja) * 1977-08-18 1985-11-09 第一電子工業株式会社 印刷回路板用フレキシブル積層板
GB2023935B (en) * 1978-06-08 1982-08-25 Nissan Motor Electric switch
FR2460444A1 (fr) * 1979-07-04 1981-01-23 Jaeger Dispositif d'eclairage des claviers a touches
US4321441A (en) * 1980-02-04 1982-03-23 Xerox Corporation Keyswitch arrangement

Also Published As

Publication number Publication date
DE3135427C2 (de) 1985-07-18
ATE16870T1 (de) 1985-12-15
EP0073932A1 (fr) 1983-03-16
DE3135427A1 (de) 1983-04-21

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