EP0965899B1 - Tableau frontal pour un appareil électronique - Google Patents

Tableau frontal pour un appareil électronique Download PDF

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Publication number
EP0965899B1
EP0965899B1 EP19990110566 EP99110566A EP0965899B1 EP 0965899 B1 EP0965899 B1 EP 0965899B1 EP 19990110566 EP19990110566 EP 19990110566 EP 99110566 A EP99110566 A EP 99110566A EP 0965899 B1 EP0965899 B1 EP 0965899B1
Authority
EP
European Patent Office
Prior art keywords
front unit
membrane
control elements
circuit board
front panel
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
EP19990110566
Other languages
German (de)
English (en)
Other versions
EP0965899A3 (fr
EP0965899A2 (fr
Inventor
Karsten Kirchhoff
Rudolf Arndt
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0965899A2 publication Critical patent/EP0965899A2/fr
Publication of EP0965899A3 publication Critical patent/EP0965899A3/fr
Application granted granted Critical
Publication of EP0965899B1 publication Critical patent/EP0965899B1/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
    • H01H13/84—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 characterised by ergonomic functions, e.g. for miniature keyboards; characterised by operational sensory functions, e.g. sound feedback
    • H01H13/85—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 characterised by ergonomic functions, e.g. for miniature keyboards; characterised by operational sensory functions, e.g. sound feedback characterised by tactile feedback features
    • 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
    • H01H13/705—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 characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H2011/0081—Apparatus or processes specially adapted for the manufacture of electric switches using double shot moulding, e.g. for forming elastomeric sealing elements on form stable casing
    • 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
    • H01H2221/00—Actuators
    • H01H2221/09—Flexible integral part of housing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/002—Casings sealed
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/044—Injection moulding
    • H01H2229/046—Multi-colour or double shot injection moulding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2231/00—Applications
    • H01H2231/026—Car

Definitions

  • the invention relates to a front unit for an electronic device, in particular a car radio.
  • electronics control is usually via keys located in corresponding recesses of a front cap.
  • the key tappet actuate switches, which are arranged as well as light-emitting diodes (LEDs) for backlighting the keys on a circuit board behind the front cap.
  • LEDs light-emitting diodes
  • the circuit board with the switching elements arranged on it and he control panel with their integrated controls a flexible cover mat made of silicone rubber.
  • the flexible cover mat has arranged in the region of the switching elements Tastendome over which the confirmation elements act on the switching elements and work as reset elements.
  • the FR 2 562 320 A1 shows a key element in which a tactile surface is connected via a membrane with a key body. Upon movement of the tactile surface, the membrane deforms elastically.
  • the button can be illuminated via a photoelectric diode. About a Tastst Schemeel a switching contact below the touch surface can be triggered.
  • the GB 2 253 586 A which is considered to be the closest prior art, shows a keyboard in which keys and keyboard surface are integrally formed in an injection molding step and of a material.
  • a conductive paint can be applied to the backs of the keys.
  • the front unit according to the invention for an electronic device, in particular a car radio, with the features of claim 1 has the advantage that the front cap can be produced integrally in one piece together with the controls for operating the device and the flexible membranes to return the controls. As a result, the effort and thus the cost of assembling the electronic device are significantly reduced. Furthermore, the direct connection of the controls with the front cap through a diaphragm without additional tuning ensures smooth movement of the controls relative to the front cap.
  • One Another advantage lies in the fact that an opaque membrane effectively prevents any stray light when backlighting the controls of the front unit. The completely closed front of the front unit also protects the underlying electronics from moisture or dirt.
  • the front cap and the control elements are made of a polycarbonate and the membrane is made of an elastomer. These materials enable cost-effective and simple production in the two-component injection molding process. For this purpose, either a tool with multiple nests is used or the component is sprayed using two different tools. Crystal-clear Makrolon is preferably used for the front cap and the controls. The optical properties and finish of the front cap and controls can then be determined by the finish used.
  • a printed circuit board with correspondingly arranged LEDs is attached to the backlighting of the controls behind the front cap.
  • To control the functions of the device tact switches are provided on the circuit board, which are actuated by the movement of the controls connected to the front cap.
  • the underside of the control elements is provided with an electrically conductive lacquer.
  • an electrical contact is made immediately. In this embodiment, therefore, can be dispensed with the key switch on the circuit board, resulting in a further significant cost reduction in the production of the front unit.
  • the front unit of an electronic device shown in Fig. 1 allows the operation of a (not shown) associated electronic device, in particular a car radio.
  • the front unit is usually located at the front of the car radio and includes elements for controlling the various functions, such as station selection, start / stop the playback of a music cassette / CD, etc.
  • buttons 20 are shown as an example in Fig. 1, also possible However, they are also two- or four-way rockers, which combine several functions in one control.
  • the shape of the buttons depends only on the desired design.
  • an elastic membrane 30th Between the keys 20 and the front cap 10 is according to the invention in each case an elastic membrane 30th
  • the elastic membrane 30 preferably fulfills several functions. First, it allows movement of the key 20 in a direction substantially perpendicular to the front cap 10 direction. On the other hand, it generates on actuation the key 20, the necessary restoring force to return it to the starting position when it is relieved by the operator.
  • the mechanical resistance on actuation of the key 20 is determined by the shape of the diaphragm 30 and the flexibility of the material used.
  • the membrane 30 is U-shaped in cross section (see Fig. 2). It is also conceivable, however, a bellows-like training. Since the membrane 30 surrounds the key 20 all around, thereby movement of the key 20 in the plane of the front cap 10 is made difficult while the movement is made perpendicular to the plane of the front cap 10.
  • the front cap 10, the keys 20 and the diaphragm 30 are produced according to the invention by injection molding of two components.
  • the front cap 10 is first injected in a tool. Then the component is converted into another tool and sprayed the individual keys. If the same plastic is to be used for the front cap 10 and the keys 20, the two steps can be performed in one pass using a single tool having branches in the gate.
  • the membrane surrounding the keys between the keys 20 and the front cap 10 is injected and the two keys thereby integrally connected.
  • the illustrated method can be extended by further spraying operations, e.g. the symbols on the buttons or graphic elements on the cap should be made of a different plastic than the respective surrounding material.
  • polycarbonates are used for the front cap 10 and the keys 20, and elastomers are used for the membrane 30.
  • Transparent polyacrolone is preferably used as the polycarbonate, so that the light transmission of the components is determined only by the paint used, or targeted transparent surfaces can be set.
  • the front cap 10 and the keys 20 are first eroded, eg according to VDI step 24, before a white base coat is applied.
  • the color of the topcoat depends on the respective requirements of the design, but usually a black topcoat (eg available under the trade name RAL 9005) is used.
  • a glaze RAL 9002 is applied to the keys 20 and optionally the front cap 10. This ensures that at these points, the light for backlighting of the controls can penetrate to the outside.
  • a printed circuit board 40 is mounted on the back of the front cap 10 via links 43 which are inserted into recesses 11 of the front panel, which is aligned parallel to the plane of the front cap 10.
  • the connections 42 shown only schematically in FIG. 3 can be realized by screwing, riveting, pinning or the like.
  • On the circuit board 40 are preferably arranged push-button 41, which are actuated by the backs of the keys 20 (the key tappets).
  • light-emitting diodes 42 are preferably provided for backlighting the keys 20, which enable operation of the device even in the dark.
  • the key switches 41 and the LEDs 42 are preferably formed as SMD components ("surface mounted device") to allow a flat design of the front unit. Since the gaps between the keys 20 and the front cap 10 are covered by the membrane 30, the light of the light emitting diodes 42 only falls through the - depending on the design - provided for translucent points in the keys 20 and the front cap 10th
  • the cover of the column through the membrane 30 also protects the circuit board 40 and the underlying electronics and mechanics of the device effectively against moisture and contamination.
  • the front unit according to the invention can therefore be used in particular also for radios which are frequently exposed to weathering, e.g. in motorcycles or vehicles with removable top.
  • an electrically conductive lacquer layer is preferably applied by printing on the back of the keys 20 on the key tappet.
  • the key tappet and thus the conductive lacquer layer is pressed against two contact surfaces which are provided on the printed circuit board 40. In this way, an electrical contact between the two contact surfaces is produced directly. Since the keys thus take over the switching function together with the printed circuit board, the push-button switch 41 is omitted in this embodiment. In addition to further cost savings, an even flatter design of the entire front unit is possible.

Claims (6)

  1. Panneau de façade pour un appareil électronique, notamment un autoradio comprenant
    un couvercle frontal (10),
    des éléments de commande (20) mobiles, reliés de manière intégrale chaque fois par une membrane (30) au couvercle frontal (10) pour que lors du mouvement de l'élément de commande (20) la membrane serve de moyen de guidage et d'élément de rappel,
    caractérisé en ce que
    le couvercle frontal (10), les éléments de commande (20) et la membrane (30) sont fabriqués par un procédé d'injection à deux composants, le couvercle frontal (10) et les éléments de commande (20) en un polycarbonate et la membrane (20) en un élastomère.
  2. Panneau de façade selon la revendication 1,
    caractérisé en ce que
    la membrane (30) a une section en forme de U ou une section en forme de soufflet.
  3. Panneau de façade selon l'une quelconque des revendication précédentes,
    caractérisé en ce que
    l'unité frontale comporte en outre une plaque de circuit (40) reliée à elle de manière amovible et comportant des diodes photoluminescentes (42) pour assurer l'éclairage arrière des éléments de commande (20) et du couvercle frontal (10).
  4. Panneau de façade selon la revendication 3,
    selon lequel
    la plaque de circuit (40) comporte des commutateurs à touche (41) installés derrière le couvercle frontal et qui sont actionnés par le mouvement des éléments de commande (20).
  5. Panneau de façade selon la revendication 3,
    dans lequel
    la face inférieure des éléments de commande (20) porte un verni électro-conducteur et en touchant la plaque de commutateur (40) on réalise un contact électrique.
  6. Panneau de façade selon la revendication 1 ou 2,
    dans lequel
    la plaque de façade et la plaque de circuit (40) reliée à celle-ci, de préférence de manière amovible, ainsi que les lampes et les guides de lumière, sont destinés à éclairer par l'arrière les éléments de commande (20) et le couvercle frontal (10).
EP19990110566 1998-06-16 1999-06-01 Tableau frontal pour un appareil électronique Expired - Lifetime EP0965899B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19826851 1998-06-16
DE1998126851 DE19826851A1 (de) 1998-06-16 1998-06-16 Fronteinheit für ein elektronisches Gerät

Publications (3)

Publication Number Publication Date
EP0965899A2 EP0965899A2 (fr) 1999-12-22
EP0965899A3 EP0965899A3 (fr) 2003-03-26
EP0965899B1 true EP0965899B1 (fr) 2007-12-12

Family

ID=7871079

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990110566 Expired - Lifetime EP0965899B1 (fr) 1998-06-16 1999-06-01 Tableau frontal pour un appareil électronique

Country Status (4)

Country Link
EP (1) EP0965899B1 (fr)
JP (1) JP2000057868A (fr)
DE (2) DE19826851A1 (fr)
ES (1) ES2296354T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10062554B4 (de) * 2000-12-15 2004-07-01 Robert Bosch Gmbh Verfahren zur Herstellung eines Bedienelements und Bedienelement
DE10224267A1 (de) * 2002-05-31 2003-12-11 Kostal Leopold Gmbh & Co Kg Lichtleitkörper
ITMI20070397A1 (it) * 2007-03-01 2008-09-02 Campagnolo Srl Dispositivo di comando per bicicletta e bicicletta che lo comprende

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2037079A (en) * 1978-12-05 1980-07-02 Standard Telephones Cables Ltd Modular keyboard
FR2523365B1 (fr) * 1982-03-11 1988-05-13 Mektron France Sa Clavier tactile monolithique et plat
FR2562320B1 (fr) * 1984-03-28 1988-03-25 Telemecanique Electrique Element modulaire constructif pour la realisation d'appareils de dialogue entre un operateur et un systeme de traitement d'informations
DE3831314A1 (de) * 1988-09-15 1990-03-29 Hagenuk Telecom Gmbh Abdeckmatte fuer schaltungstraeger
DE9106424U1 (fr) * 1990-07-19 1991-07-18 Silitek Corp., Taipeh/T'ai-Pei, Tw
US5311656A (en) * 1991-03-12 1994-05-17 Mitel Corporation Keypad method of manufacture
DE9302229U1 (fr) * 1993-02-16 1993-04-01 Silitek Corp., Taipeh/T'ai-Pei, Tw

Also Published As

Publication number Publication date
DE19826851A1 (de) 1999-12-23
JP2000057868A (ja) 2000-02-25
EP0965899A3 (fr) 2003-03-26
EP0965899A2 (fr) 1999-12-22
DE59914575D1 (de) 2008-01-24
ES2296354T3 (es) 2008-04-16

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