EP0366832B1 - Couvercle pour claviers à feuilles minces de contact - Google Patents

Couvercle pour claviers à feuilles minces de contact Download PDF

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Publication number
EP0366832B1
EP0366832B1 EP88118451A EP88118451A EP0366832B1 EP 0366832 B1 EP0366832 B1 EP 0366832B1 EP 88118451 A EP88118451 A EP 88118451A EP 88118451 A EP88118451 A EP 88118451A EP 0366832 B1 EP0366832 B1 EP 0366832B1
Authority
EP
European Patent Office
Prior art keywords
laminate
keyboard
plate
type keyboard
pressure
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 - Lifetime
Application number
EP88118451A
Other languages
German (de)
English (en)
Other versions
EP0366832A1 (fr
Inventor
Max Schenk
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.)
DYNALAB AG
Original Assignee
DYNALAB AG
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 DYNALAB AG filed Critical DYNALAB AG
Priority to DE88118451T priority Critical patent/DE3888182D1/de
Priority to EP88118451A priority patent/EP0366832B1/fr
Priority to AT88118451T priority patent/ATE102388T1/de
Publication of EP0366832A1 publication Critical patent/EP0366832A1/fr
Application granted granted Critical
Publication of EP0366832B1 publication Critical patent/EP0366832B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H2209/00—Layers
    • H01H2209/01—Increasing rigidity; Anti-creep
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/068—Properties of the membrane
    • H01H2209/07—Properties of the membrane metallic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2209/00—Layers
    • H01H2209/068—Properties of the membrane
    • H01H2209/076—Properties of the membrane non elastomeric
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2217/00—Facilitation of operation; Human engineering
    • H01H2217/024—Profile on actuator
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/044—Protecting cover
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/038—Anti-vandalism

Definitions

  • the invention relates to a membrane keyboard according to the preambles of the first and fifth claims.
  • Membrane keyboards which already respond to low pressure and / or short travel and switch or generate an electrical signal, are increasingly used thanks to their simple installation options and their low cost.
  • a membrane keyboard that responds to pressure is e.g. known from European patent application 0 210 386.
  • the invention is therefore based on the object, membrane keyboards with a cover for the actuating surface to create, which offers this additional protection and improved appearance, without affecting the operability of the keyboard.
  • Fig. 1 shows a sectional view of a part of the cover according to the invention, which lies over a key of a membrane keyboard.
  • the membrane keyboard 10 is shown in the form of a pressure-actuated, pathless piezoelectric membrane keyboard, as is known from EP 0 210 386.
  • the membrane keyboard consists of two foils 12 and 13 and one Spacer film 11. Piezo crystal elements are inserted into recesses in the spacer film 11, one of which, the element 16, is shown in the partial view of FIG. 1. This element 16 is contacted via conductor tracks 15 on the foils 12 and 13. When pressure acts on the film 12 forming the actuating surface of the keyboard in the area of the element 16, this emits an electrical signal.
  • the membrane keyboard 10 is attached to the housing 18 of any electrical device.
  • the cover according to the invention has a rigid plate 1.
  • This can be chosen as thick and made of such a material, e.g. Aluminum that good protection of the membrane keyboard 10 arranged below is guaranteed.
  • the plate 1 can e.g. made of brass or wood.
  • a rigid plate is understood to mean a plate which is so thick that the membrane keyboard underneath cannot be operated properly when the plate is pressed, be it that no key responds or that several keys respond at the same time.
  • zones of reduced rigidity are therefore provided in the cover, which come to lie above the respective key areas of the membrane keyboards when the plate 1 is arranged on the membrane keyboard.
  • the arrangement of the plate 1 on the membrane keyboard 10 can be done for example by gluing or by a keyboard and plate holding frame or by attaching the plate 1 to the housing 18 of a device lying under the keyboard.
  • the plate 1 is provided with a recess above the key area.
  • the recess is open towards the film 12 and is chosen so deep that the plate part 2 remaining above the recess has sufficient elasticity to pass on the finger pressure on the part 2 to actuate the key on the key, what happens by means of the insert 4 held movably in the recess.
  • the part 2 can have a thickness of approximately 0.5 to 2 mm. This enables actuation of the piezo crystal keyboard, which works practically without a path, without further ado.
  • part 2 In the case of membrane keyboards that require a work path to switch, part 2 must be selected thinner (approximately 0.5 to 1 mm) to ensure that the keyboard is actuated.
  • the insert 4 can be made of any rigid or only slightly compressible material, e.g. from a plastic.
  • a print can be provided on the plate 1 to identify the key area below it.
  • the marking can also be etched in the plate or applied or inserted as scratch-resistant as possible in another known manner.
  • a zone of reduced stiffness can also be provided for each key of the membrane keyboard only for part of it; the other buttons are then not usable because covered by the rigid plate 1 and thus locked.
  • certain buttons can be locked by means of the cover, if this is desired, and these buttons can be made operable again by exchanging the plate 1 for a correspondingly differently provided with other plate 1.
  • Fig. 2 shows an embodiment in which the recess is formed only by a narrow groove 3 surrounding the key area.
  • the recesses can be created using various processing methods, e.g. by milling.
  • Fig. 3 shows a further embodiment, the insert 4 in this case e.g. is attached to the part 2 of reduced thickness by gluing, welding or soldering.
  • Fig. 4 shows an embodiment with a movable insert 4, which is connected to the part 2 via a snap spring 6 ("frog") arranged in the recess 3.
  • frog snap spring 6
  • FIG. 5 shows the case in which the recess extends through the plate 1.
  • a further plate 5 is then arranged on the plate 1, which has a thickness which corresponds approximately to the thickness of the remaining part 2 in the previously described embodiments.
  • the insert 4 again corresponds to FIG. 1.
  • FIG. 6 shows an embodiment in which the recess extends into the plate 1 from the operating side. This also leaves a thinner material area 2 which allows the key to be pressed. In this embodiment, a depression is also created in which the operator's finger is held when the button is pressed, which prevents incorrect operation.

Landscapes

  • Push-Button Switches (AREA)
  • Input From Keyboards Or The Like (AREA)

Claims (7)

  1. Clavier à feuille (10) avec une feuille supérieure et une feuille inférieure (12, 13) entre lesquelles sont enfermés des éléments piézo-électriques (16) dont les surfaces sont en contact avec des bandes conductrices (15) placées sur les surfaces intérieures des feuilles (12, 13) pour collecter des signaux électriques produits par chaque élément piézo-électrique (16) lorsqu'une pression est exercée sur la région de la feuille située au-dessus de cet élément, caractérisé en ce qu'une plaque rigide (1) formant couvercle est agencée sur le clavier à feuille (10) et qu'elle repose sur la feuille supérieure (12) tant dans la région des éléments piézo-électriques (16) que dans les régions situées entre ceux-ci, et en ce que la plaque rigide (1) comporte des cavités (3) dans la région des éléments piézo-électriques (16), pour former chacune une zone de transmission de pression présentant une rigidité amoindrie.
  2. Clavier à feuille (10) selon la revendication 1, caractérisé en ce que chaque cavité (3) est ouverte en direction de la feuille supérieure (12) et forme une rainure périphérique à l'élément piézo-électrique (16).
  3. Clavier à feuille (10) selon la revendication 1, caractérisé en ce que les cavités (3) sont ouvertes en direction de la surface d'actionnement du clavier à feuille (10) et forment une région creuse d'utilisation des touches.
  4. Clavier à feuille (10) selon une des revendications 1 à 3, caractérisé en ce que la plaque formant couvercle (1) est une plaque en aluminium d'environ 5 mm d'épaisseur, dont l'épaisseur résiduelle dans la région des cavités (3) est d'environ 0,5 à 2 mm.
  5. Clavier à feuille (10) avec une feuille supérieure et une feuille inférieure (12, 13) entre lesquelles sont enfermés des éléments piézo-électriques (16) dont les surfaces sont en contact avec des bandes conductrices (15) placées sur les surfaces intérieures des feuilles (12, 13) pour collecter des signaux électriques produits par chaque élément piézo-électrique (16) lorsqu'une pression est exercée sur la région de la feuille située au-dessus de cet élément, caractérisé en ce qu'une plaque rigide (1) formant couvercle est agencée sur le clavier à feuille (10), et qu'elle repose sur la feuille supérieure (12) dans les régions situées entre les éléments piézo-électriques (16), et que des cavités (3) ouvertes vers la feuille supérieure (12) sont agencées dans la plaque rigide (1) dans la région des éléments piézo-électriques (16) pour former chacune une zone de transmission de pression ayant une rigidité amoindrie, et qu'une pièce insérée (4) reposant sur la feuille supérieure (12) et servant à transmettre la pression est prévue dans chacune des cavités (3).
  6. Clavier à feuille (10) selon la revendication 5, caractérisé en ce que la pièce insérée (4), au moyen de laquelle une pression peut être transmise de la surface d'actionnement de la plaque (1) formant couvercle à la surface de travail du clavier à feuille (10), est mobile dans la cavité (3).
  7. Clavier à feuille (10) selon la revendication 5, caractérisé en ce que la pièce insérée (4), au moyen de laquelle une pression peut être transmise de la surface d'actionnement de la plaque (1) formant couvercle à la surface de travail du clavier à feuille (10), est fixée à la zone de moindre rigidité.
EP88118451A 1988-11-04 1988-11-04 Couvercle pour claviers à feuilles minces de contact Expired - Lifetime EP0366832B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE88118451T DE3888182D1 (de) 1988-11-04 1988-11-04 Abdeckung für Folientastaturen.
EP88118451A EP0366832B1 (fr) 1988-11-04 1988-11-04 Couvercle pour claviers à feuilles minces de contact
AT88118451T ATE102388T1 (de) 1988-11-04 1988-11-04 Abdeckung fuer folientastaturen.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88118451A EP0366832B1 (fr) 1988-11-04 1988-11-04 Couvercle pour claviers à feuilles minces de contact

Publications (2)

Publication Number Publication Date
EP0366832A1 EP0366832A1 (fr) 1990-05-09
EP0366832B1 true EP0366832B1 (fr) 1994-03-02

Family

ID=8199526

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88118451A Expired - Lifetime EP0366832B1 (fr) 1988-11-04 1988-11-04 Couvercle pour claviers à feuilles minces de contact

Country Status (3)

Country Link
EP (1) EP0366832B1 (fr)
AT (1) ATE102388T1 (fr)
DE (1) DE3888182D1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4202438C2 (de) * 1992-01-29 1993-12-09 Siemens Ag Bedienpaneel für ein zahnärztliches Gerät
GB9413804D0 (en) * 1994-07-08 1994-08-24 Expo Safety Syst Keyboard system
DE4424618C2 (de) * 1994-07-13 1996-07-11 Grundig Emv Vorrichtung zur Übertragung von einer auf eine Taste ausgeübten Kraft auf einen Kraftsensor
FI104928B (fi) 1997-11-27 2000-04-28 Nokia Mobile Phones Ltd Langaton viestin ja menetelmä langattoman viestimen valmistuksessa
US6765158B1 (en) * 2003-05-08 2004-07-20 Lear Corporation Low profile switch with flat wire harness
DE102004047516A1 (de) * 2004-09-28 2006-04-06 Carl Freudenberg Kg Sensor-Anordnung und Verwendungen einer Sensor-Anordnung
DE102005053929A1 (de) * 2005-11-11 2007-05-16 Bsh Bosch Siemens Hausgeraete Bedienelement für Haushaltsgerät
FI20060396A0 (fi) * 2006-04-25 2006-04-25 Teknillinen Korkeakoulu Tasopinta ja siihen integroitu pinta kuten näyttöpinta
DE102007054778A1 (de) * 2007-11-16 2009-05-20 Diehl Ako Stiftung & Co. Kg Bedienvorrichtung mit wenigstens einem Druckschalter
DE102008062216B4 (de) * 2008-12-13 2010-09-23 Diehl Ako Stiftung & Co. Kg Bedienvorrichtung mit wenigstens einem Druckschalter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210386A1 (fr) * 1985-07-23 1987-02-04 Dynalab Ag Clavier à couches multiplesavec des touches piezoélectriques

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643041A (en) * 1970-12-30 1972-02-15 Unidynamics Phoenix Pushbutton diaphragm switch with improved dimple actuator and/or capacitance-type switch contact structure
DE3006592A1 (de) * 1980-02-22 1981-08-27 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Tastschalter
US4620075A (en) * 1983-06-10 1986-10-28 Price Pfister, Inc. Unitized control panel
JPH044338Y2 (fr) * 1985-05-31 1992-02-07
US4771139A (en) * 1986-06-27 1988-09-13 Desmet Gregory L Keyboard with metal cover and improved switches

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0210386A1 (fr) * 1985-07-23 1987-02-04 Dynalab Ag Clavier à couches multiplesavec des touches piezoélectriques

Also Published As

Publication number Publication date
ATE102388T1 (de) 1994-03-15
EP0366832A1 (fr) 1990-05-09
DE3888182D1 (de) 1994-04-07

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