EP0231007A2 - Bouton-poussoir - Google Patents

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Publication number
EP0231007A2
EP0231007A2 EP87101063A EP87101063A EP0231007A2 EP 0231007 A2 EP0231007 A2 EP 0231007A2 EP 87101063 A EP87101063 A EP 87101063A EP 87101063 A EP87101063 A EP 87101063A EP 0231007 A2 EP0231007 A2 EP 0231007A2
Authority
EP
European Patent Office
Prior art keywords
key
push button
key cap
display unit
button according
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Withdrawn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
EP87101063A
Other languages
German (de)
English (en)
Other versions
EP0231007A3 (fr
Inventor
Eric Jung
Roland Van Den Eynde
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 EP0231007A2 publication Critical patent/EP0231007A2/fr
Publication of EP0231007A3 publication Critical patent/EP0231007A3/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Withdrawn legal-status Critical Current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
    • H01H2219/00—Legends
    • H01H2219/002—Legends replaceable; adaptable
    • H01H2219/01—Liquid crystal
    • H01H2219/012—Liquid crystal programmable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/066—Lens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/07—Actuators transparent

Definitions

  • the invention relates to a push button, in particular for keyboards.
  • a movable electrical connection between the key cap and the key base is required in the arrangement of the display unit in the key cap.
  • This electrical connection can be made by moving contacts or by a flexible cable.
  • Such an electrical connection can prove to be prone to failure.
  • the pushbuttons are often subject to strong mechanical stresses and the vibrations when the buttons are pressed can also have a negative effect on the reliability of the display elements.
  • the invention is therefore based on the object of specifying a pushbutton by means of which different symbols can be represented depending on the application and which has a low susceptibility to faults.
  • the object is achieved with the push button of the type mentioned by the features specified in the characterizing part of claim 1.
  • the push button according to the invention has the advantage that it can be constructed inexpensively since there is no need for a conductor connection between the key base and the key cap and since the display units can be wired even using printed circuits on fixed or flexible supports.
  • the push button is largely insensitive to mechanical loads when actuated, since the display elements are not in the key caps, but in the key bases, which can be connected to the frame.
  • the upper part of the keycap can also be designed as a magnifying lens.
  • the upper part can be non-reflective, so that the symbols shown on the display unit can be easily recognized.
  • the top of the key cap is designed to be replaceable, so that if the top is scratched, it can be replaced.
  • the key base is expediently designed such that it also serves as a guide for the key cap.
  • One or more return springs can be provided in the pushbutton, in order to return the keycap to its initial position after actuation.
  • these return springs are an integral part of the key cap, in which the lower edges of the key cap are partially resilient.
  • the wiring can be done very easily when building a keyboard and also as a printed circuit, the supply lines and the signal lines being arranged in the key base.
  • the display units are designed such that they can display alphanumeric characters of different languages and / or symbols for operating a device.
  • the symbols can be displayed in white on black or inversely. It is also possible to flash the symbols for special emphasis.
  • the push button shown in Fig. 1 is part of a keyboard with a plurality of key bases 1, which are arranged fixed to the frame.
  • the key bases 1 are simultaneously designed as bases for optoelectronic display units 2, preferably liquid crystal displays with a large number of display elements.
  • the display units 2 are wired to these bases using connecting lines 3, which serve both as supply lines and as signal lines. These connecting lines 3 can be designed as printed circuits on a fixed or flexible carrier.
  • Each key base 1 also serves as a guide for a key cap 4 during the vertical movement when the push button is pressed.
  • At least one contact 5 is provided on the underside of the key cap 4, which comes into contact with a corresponding contact 6 on the key base 1 when the pushbutton is actuated in order to generate an electrical signal.
  • springs 7 are provided, which are made for example from the same material as the key cap 4 and are an integral part of this key cap 4. It is also possible to provide additional springs which, like the springs 7, serve to return the key cap 4 to its initial position after it has been actuated.
  • the upper part 8 of the key cap 4 is transparent so that the symbol shown on the display unit 2 is visible.
  • the upper part 8 is preferably designed to be exchangeable and, for example, locked in the key cap 4.
  • the upper part 8 is preferably non-reflective in order to reduce the effect of extraneous light on the visibility of the symbols and is designed as a magnifying lens in order to display the symbols shown on the display unit 2 in an enlarged manner.
  • the key cap 4 In the operating state, the key cap 4 is with the upper part 8 slipped over the key base 1 and the upper part 8 is at a distance above the display unit 2 which is greater than the stroke of the key cap 4 when it is actuated.
  • the symbol shown is visible to the operator through the upper part 8 and can be represented in the form desired in each case by means of a microcomputer connected to the connecting lines 3 or another control unit.
  • the representation can, for example, be white on black or inverse to this, and it is also possible to represent the symbols flashing or in certain colors.
  • FIG. 2 shows schematically symbols represented on an alphanumeric key S, for example a typing keyboard, and symbols represented on function keys F1 to F5 of this typing keyboard. It is assumed that the keyboard is in a state for entering Latin characters, which is shown in the left column.
  • the symbols ß on the F1 key indicate that the S key is in a state for entering alphabetic characters, namely the letter S.
  • the F2 key uses the LAT symbol to indicate that characters from a Latin alphabet should be entered.
  • the F3 key denotes the input of the characters using the keyboard and the F4 key indicates that the input of a text should have the outer form of a letter.
  • the F5 key indicates that automatic hyphenation should occur at the end of the line.
  • the F1 key is pressed with the ß symbol and the symbols indicated in the middle column appear on the F2 to F4 keys, with the triangles in the upper left corner of the keys F2 to F4 indicate a selection option.
  • the F2 key again displays the LAT symbol, the Latin character is assigned, while the F3 and F4 keys display the GR and ARA symbols, respectively, which indicate that Greek or Arabic characters are to be entered.
  • the F3 key is pressed to indicate the entry of Greek characters
  • the F2 key as shown in the right column, displays the GR symbol, which indicates the entry of the Greek characters.
  • the Greek letters appear on the keyboard pushbuttons instead of the Latin letters.
  • the Greek character as shown in S2 is displayed on the S key.
  • the F5 key can now specify a manual hyphenation at the end of the line.
  • this symbol ARA would have been displayed on the F2 key in the right column and, for example, an Arabic character would be displayed on the S key, as shown at S3.

Landscapes

  • Input From Keyboards Or The Like (AREA)
EP87101063A 1986-01-31 1987-01-27 Bouton-poussoir Withdrawn EP0231007A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3603019 1986-01-31
DE3603019 1986-01-31

Publications (2)

Publication Number Publication Date
EP0231007A2 true EP0231007A2 (fr) 1987-08-05
EP0231007A3 EP0231007A3 (fr) 1989-11-15

Family

ID=6293108

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87101063A Withdrawn EP0231007A3 (fr) 1986-01-31 1987-01-27 Bouton-poussoir

Country Status (1)

Country Link
EP (1) EP0231007A3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2242572A (en) * 1990-03-30 1991-10-02 Barcrest Ltd Switch assembly
FR2685537A1 (fr) * 1991-12-23 1993-06-25 Levin Laurent Dispositif pour formuler un code secret en toute confidentialite en milieu ouvert.
US20150213974A1 (en) * 2014-01-28 2015-07-30 Jen-Wen SUN Key structure

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4078257A (en) * 1976-08-23 1978-03-07 Hewlett-Packard Company Calculator apparatus with electronically alterable key symbols
DE8212658U1 (de) * 1982-05-03 1982-08-19 Teldix Gmbh, 6900 Heidelberg Anzeige- und/oder Tastenfeldeinheit
DE8334346U1 (de) * 1983-11-30 1984-03-22 Mueller, Rolf, Dr., 6750 Kaiserslautern Vorrichtung, insbesondere fuer schreibmaschinen und terminals
DE3346485A1 (de) * 1983-12-22 1985-07-04 Siemens AG, 1000 Berlin und 8000 München Tastenkappe fuer eine in einem gehaeuse angeordnete tastatur

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2242572A (en) * 1990-03-30 1991-10-02 Barcrest Ltd Switch assembly
FR2685537A1 (fr) * 1991-12-23 1993-06-25 Levin Laurent Dispositif pour formuler un code secret en toute confidentialite en milieu ouvert.
US20150213974A1 (en) * 2014-01-28 2015-07-30 Jen-Wen SUN Key structure
US9818557B2 (en) * 2014-01-28 2017-11-14 Jen-Wen SUN Key structure

Also Published As

Publication number Publication date
EP0231007A3 (fr) 1989-11-15

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Inventor name: VAN DEN EYNDE, ROLAND

Inventor name: JUNG, ERIC