EP0215465A2 - Tapis à contact pour claviers - Google Patents

Tapis à contact pour claviers Download PDF

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Publication number
EP0215465A2
EP0215465A2 EP86112711A EP86112711A EP0215465A2 EP 0215465 A2 EP0215465 A2 EP 0215465A2 EP 86112711 A EP86112711 A EP 86112711A EP 86112711 A EP86112711 A EP 86112711A EP 0215465 A2 EP0215465 A2 EP 0215465A2
Authority
EP
European Patent Office
Prior art keywords
contact
contact mat
recess
electrically conductive
keyboards
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Withdrawn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
EP86112711A
Other languages
German (de)
English (en)
Other versions
EP0215465A3 (fr
Inventor
Herbert Höger
Alfred Dr.Rer.Nat. Murr
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0215465A2 publication Critical patent/EP0215465A2/fr
Publication of EP0215465A3 publication Critical patent/EP0215465A3/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Withdrawn legal-status Critical Current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
    • H01H2205/016—Separate bridge contact
    • H01H2205/022—Conductive rubber
    • 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
    • H01H2215/00—Tactile feedback
    • H01H2215/004—Collapsible dome or bubble
    • H01H2215/008—Part of substrate or membrane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2225/00—Switch site location
    • H01H2225/006—Switch site location more then one pole
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/058—Curing or vulcanising of rubbers

Definitions

  • the invention relates to a contact mat for keyboards made of electrical non-conductive elastic material with a number of keys corresponding to the number of electrically conductive contact nipples, which are arranged above the conductor tracks of a circuit board or a contact foil and bridges individual conductor tracks for making contact when a key is pressed.
  • the mats on the actuation side have a number of lifting bellows which corresponds to the number of buttons and which, when depressed and after overcoming a certain resistance, performs a snap-like movement.
  • the bellows are provided with electrically conductive pimples so that individual conductor tracks can be bridged in the area of the contact point.
  • These contact pimples can e.g. be prefabricated. They are then placed in a tool and vulcanized onto the raw mat. Another option is the two-color spraying process with silicone rubber.
  • it is conceivable to form the Pimpel by printing on the switching nipples using a conductive paste.
  • the object of the invention is to present a contact mat, in the manufacture of which the manufacturing outlay can be reduced and at the same time the adhesive strength of the poplar is increased.
  • the contact points of the contact mat are each formed by at least one depression which is filled with a liquid and curable, electrically conductive material.
  • layers of electrically conductive material of any thickness can be applied.
  • the adhesive strength is significantly increased by the large surfaces of the recess adjoining the electrically conductive material.
  • such a design can be carried out very simply by means of a metering device, in order nevertheless to achieve high manufacturing quality.
  • the material is a silicone rubber that is easy to process.
  • the depression can have a concave cross section. However, it is also conceivable that this is formed by pulling up a spray edge formed during the manufacture of the contact mat in order to achieve the largest possible contact area.
  • the contact mat shown in FIG. 1 consists of material such as rubber or plastic that has electrically non-conductive elastic properties. On one side, the mat has bellows, which are connected to keys and which can cause the keys to return to their original position. On the other hand, the contact-making elements 1, 2, 3, 4 of the mat are arranged.
  • FIG. 2 shows a section of the contact mat in the contact-making area.
  • the surface 5 of the bellows 7 has a recess 6 which has an approximately concave cross section.
  • an electrically conductive material 13 is introduced, which is mechanically firmly connected to the material of the contact mat.
  • a button (not shown) can act on the bellows and push it towards e.g. to move a circuit board.
  • the contours of the bellows are formed so that, as is generally known, it performs a snap-like movement after a certain distance.
  • FIG. 3 shows a further embodiment.
  • the surface 5 of the bellows has a disc-shaped depression 8 which is filled with electrically conductive material 9.
  • FIG. 4 Another variant is shown in FIG. 4.
  • the surface of the bellows 5 is provided with two depressions 10, 11, which are formed by longitudinal grooves in the surface and are filled with electrically conductive material 12.

Landscapes

  • Push-Button Switches (AREA)
EP86112711A 1985-09-18 1986-09-15 Tapis à contact pour claviers Withdrawn EP0215465A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3533297 1985-09-18
DE3533297 1985-09-18

Publications (2)

Publication Number Publication Date
EP0215465A2 true EP0215465A2 (fr) 1987-03-25
EP0215465A3 EP0215465A3 (fr) 1989-07-12

Family

ID=6281299

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86112711A Withdrawn EP0215465A3 (fr) 1985-09-18 1986-09-15 Tapis à contact pour claviers

Country Status (4)

Country Link
EP (1) EP0215465A3 (fr)
JP (1) JPS6269414A (fr)
AU (1) AU594368B2 (fr)
IN (1) IN164348B (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55143722A (en) * 1979-04-26 1980-11-10 Nissan Motor Switching device
DE3032557C2 (de) * 1980-08-29 1985-02-07 Standard Elektrik Lorenz Ag, 7000 Stuttgart Gummielastisches Tastkontaktelement

Also Published As

Publication number Publication date
AU6276086A (en) 1987-03-19
IN164348B (fr) 1989-02-25
EP0215465A3 (fr) 1989-07-12
JPS6269414A (ja) 1987-03-30
AU594368B2 (en) 1990-03-08

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Effective date: 19910602

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Inventor name: MURR, ALFRED, DR.RER.NAT.

Inventor name: HOEGER, HERBERT