EP0302350A2 - Case for electronic plug-in units with control elements, especially for keyboards, arranged on one surface of the case - Google Patents

Case for electronic plug-in units with control elements, especially for keyboards, arranged on one surface of the case Download PDF

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Publication number
EP0302350A2
EP0302350A2 EP88111973A EP88111973A EP0302350A2 EP 0302350 A2 EP0302350 A2 EP 0302350A2 EP 88111973 A EP88111973 A EP 88111973A EP 88111973 A EP88111973 A EP 88111973A EP 0302350 A2 EP0302350 A2 EP 0302350A2
Authority
EP
European Patent Office
Prior art keywords
housing
circuit board
case
housing part
control elements
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.)
Granted
Application number
EP88111973A
Other languages
German (de)
French (fr)
Other versions
EP0302350A3 (en
EP0302350B1 (en
Inventor
Otto Kessler
Wilhelm Löffel
Reinhard Dipl.-Ing. Schmitt (Fh)
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
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP0302350A2 publication Critical patent/EP0302350A2/en
Publication of EP0302350A3 publication Critical patent/EP0302350A3/en
Application granted granted Critical
Publication of EP0302350B1 publication Critical patent/EP0302350B1/en
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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/008—Casings metallic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/004—High frequency adaptation or shielding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/008—Static electricity considerations

Definitions

  • the invention relates to a housing for electronic assemblies with control elements arranged on a housing surface, in particular keyboards.
  • the sensitive electronic assemblies installed in such housings and the electronics connected to the operating elements are to be protected against electromagnetic interference radiation and also against the action of electrostatic charges or discharges.
  • the structure of the device can be designed flexibly, since, for example, for other key principles, such as a membrane keyboard, only the control elements or the keyboard circuit board can be exchanged without intervention in the electronics.
  • Good contacting of the conductive coating on the surface of the circuit board with the housing base made of sheet metal provides good shielding against electromagnetic interference, as well as the discharge of any electrostatic charges, for example via a shielded connecting cable, the screen of which is conductively connected to the housing base .
  • the housing shown in Figure 1 for electronic assemblies with a control element arranged on a housing surface consists of a lower housing part 1 made of electrically conductive material in the form of an open-top box and a lid-like upper housing part in the form of a printed circuit board 2 as a carrier of operating elements 3, here indicated as a keyboard.
  • Receptacles for one or more electronic assemblies 4 are arranged in the interior of the lower housing part 1.
  • the printed circuit board 2 of the upper housing part carries a conductor pattern 6 on its lower surface facing the housing interior, while its outer surface is provided with a continuous metal coating 5.
  • parts of the upper edges of the lower housing part 1 are designed as resilient contact elements 7, they rest against the edge sections 8 of the printed circuit board 2 provided with a conductive tin coating, so that a good conductive connection between the metal coating 5 of the surface and the lower housing part 1 arises.
  • This separable contact makes it possible to remove the upper housing part and replace it with another one without any further measures.
  • the conductor pattern 6 of the printed circuit board 2 on the lower surface facing the interior of the housing can be connected via plug connectors and flexible lines 9 to the other electronic assemblies 4 arranged in the lower housing part 1. If necessary, the underside of the circuit board 2 carrying the circuit pattern can also be equipped with components 10. To protect the controls 3 and the conductive surface The printed circuit board 2 can be provided with a simple plastic cover 11, with openings through which the handles or buttons of the operating elements 3 are accessible.

Abstract

For protection against radiated electromagnetic interference and electrostatic discharge, the lower part (1) of the housing consists of metal, the upper part (2) consists of a printed-circuit board, whose conductor pattern (6) is located on the inner surface, while the surface has a continuous metal coating (5) which makes contact with the housing lower part (1) in a manner such that it can be isolated. Further electronic assemblies (4), which are easily replaceable, are arranged in the housing and the printed-circuit board, forming the housing upper part (2), with the keyboard, is likewise easily replaceable, for example by a film keyboard. The invention is used for computer keyboards. <IMAGE>

Description

Die Erfindung bezieht sich auf ein Gehäuse für elektronische Baugruppen mit auf einer Gehäusefläche angeordneten Bedienele­menten, insbesondere Tastaturen.The invention relates to a housing for electronic assemblies with control elements arranged on a housing surface, in particular keyboards.

Die in derartige Gehäuse eingebauten empfindlichen elektroni­schen Baugruppen sowie die mit den Bedienelementen verbundene Elektronik ist gegen elektromagnetische Störstrahlung wie auch gegen die Wirkung von elektrostatischen Auf- oder Entladungen zu schützen.The sensitive electronic assemblies installed in such housings and the electronics connected to the operating elements are to be protected against electromagnetic interference radiation and also against the action of electrostatic charges or discharges.

Dies wird erreicht mit einem Gehäuse der eingangs genannten Art, welches die Merkmale des Anspruchs 1 aufweist.This is achieved with a housing of the type mentioned at the outset, which has the features of claim 1.

Durch die Trennung der die Bedienelemente, insbesondere die Tastatur, tragenden Leiterplatte von der übrigen Elektronik kann der Aufbau des Geräts flexibel gestaltet werden, da bei­spielsweise für andere Tastenprinzipien, wie Folientastatur, lediglich die Bedienelemente oder die Tastaturleiterplatte ohne Eingriff in die Elektronik ausgetauscht werden kann. Durch eine gute Kontaktierung des leitenden Belags auf der Oberfläche der Leiterplatte mit dem aus Blech bestehenden Gehäuseunterteil wird eine gute Abschirmung gegen elektromagne­tische Störstrahlung, wie auch die Ableitung eventueller elek­trostatischer Aufladungen, erreicht, beispielsweise über ein geschirmtes Anschlußkabel, dessen Schirm mit dem Gehäuseunter­teil leitend verbunden ist.By separating the circuit board carrying the control elements, in particular the keyboard, from the rest of the electronics, the structure of the device can be designed flexibly, since, for example, for other key principles, such as a membrane keyboard, only the control elements or the keyboard circuit board can be exchanged without intervention in the electronics. Good contacting of the conductive coating on the surface of the circuit board with the housing base made of sheet metal provides good shielding against electromagnetic interference, as well as the discharge of any electrostatic charges, for example via a shielded connecting cable, the screen of which is conductively connected to the housing base .

Zur Erläuterung der Erfindung ist in den Figuren ein Ausfüh­rungsbeispiel eines erfindungsgemäßen Gehäuses dargestellt und im folgenden beschrieben.

  • Figur 1 zeigt ein Gehäuse in perspektivischer Darstellung,
  • Figur 2 einen Querschnitt durch dasselbe.
To explain the invention, an embodiment of a housing according to the invention is shown in the figures and described below.
  • FIG. 1 shows a housing in perspective,
  • Figure 2 shows a cross section through the same.

Das in Figur 1 dargestellte Gehäuse für elektronische Baugrup­pen mit einer auf einer Gehäusefläche angeordneten Bedienele­menten besteht aus einem Gehäuseunterteil 1 aus elektrisch lei­tendem Material in Form eines oben offenen Kastens sowie einem auf diesen aufsetzbaren deckelartigen Gehäuseoberteil in Form einer Leiterplatte 2 als Träger von Bedienelementen 3, hier als Tastatur angedeutet. Im Innern des Gehäuseunterteils 1 sind Aufnahmen für eine oder mehrere elektronische Baugruppen 4 angeordnet.The housing shown in Figure 1 for electronic assemblies with a control element arranged on a housing surface consists of a lower housing part 1 made of electrically conductive material in the form of an open-top box and a lid-like upper housing part in the form of a printed circuit board 2 as a carrier of operating elements 3, here indicated as a keyboard. Receptacles for one or more electronic assemblies 4 are arranged in the interior of the lower housing part 1.

Die Leiterplatte 2 des Gehäuseoberteils trägt auf ihrer unte­ren, dem Gehäuseinnern zugekehrten Fläche ein Leiterbild 6, während ihre Außenfläche mit einem durchgehenden Metallbelag 5 versehen ist.The printed circuit board 2 of the upper housing part carries a conductor pattern 6 on its lower surface facing the housing interior, while its outer surface is provided with a continuous metal coating 5.

Durch senkrechte Einschnitte sind Teile der Oberkanten des Gehäuseunterteils 1 als federnde Kontaktelemente 7 ausgebildet, sie legen sich an die mit einem leitenden Zinnbelag versehenen Kantenabschnitte 8 der Leiterplatte 2 kraftschlüssig an, so daß eine gute leitende Verbindung zwischen dem Metallbelag 5 der Oberfläche und dem Gehäuseunterteil 1 entsteht. Durch diese trennbare Kontaktierung ist es möglich, ohne wei­tere Maßnahmen das Gehäuseoberteil abzunehmen und gegen ein anderes auszutauschen.Through vertical incisions, parts of the upper edges of the lower housing part 1 are designed as resilient contact elements 7, they rest against the edge sections 8 of the printed circuit board 2 provided with a conductive tin coating, so that a good conductive connection between the metal coating 5 of the surface and the lower housing part 1 arises. This separable contact makes it possible to remove the upper housing part and replace it with another one without any further measures.

Das Leiterbild 6 der Leiterplatte 2 auf der unteren, dem Gehäu­seinnern zuzgekehrten Fläche ist über Steckverbinder und flexible Leitungen 9 mit den übrigen, in dem Gehäuseunterteil 1 angeordneten elektronischen Baugruppen 4 verbindbar. Im Bedarfs­fall kann auch die das Leiterbild tragende Unterseite der Lei­terplatte 2 mit Bauelementen 10 bestückt sein. Zum Schutz der Bedienelemente 3 und der leitenden Oberfläche der Leiterplatte 2 kann eine einfache Abdeckhaube 11 aus Kunst­stoff vorgesehen werden, mit Öffnungen, durch welche die Hand­griffe oder Tasten der Bedienelemente 3 zugänglich sind.The conductor pattern 6 of the printed circuit board 2 on the lower surface facing the interior of the housing can be connected via plug connectors and flexible lines 9 to the other electronic assemblies 4 arranged in the lower housing part 1. If necessary, the underside of the circuit board 2 carrying the circuit pattern can also be equipped with components 10. To protect the controls 3 and the conductive surface The printed circuit board 2 can be provided with a simple plastic cover 11, with openings through which the handles or buttons of the operating elements 3 are accessible.

Claims (3)

1. Gehäuse für elektronische Baugruppen mit auf einer Gehäuse­fläche angeordneten Bedienelementen, insbesondere Tastaturen, gekennzeichnet durch
- ein Gehäuseunterteil (1) aus elektrisch leitendem Material mit Aufnahmen für elektronische Baugruppen (4),
- ein deckelartiges Gehäuseoberteil in Form einer Leiterplatte (2), deren Außenfläche einen durchgehenden Metallbelag (5) und deren untere, dem Gehäuseinnern zugekehrte Fläche ein mit auf der Leiterplatte (2) angeordneten Bedienelementen (3) elektrisch verbundenes Leiterbild (6) trägt,
- Kontaktelemente (7) an den Oberkanten des Gehäuseunterteils (1) zur trennbaren Kontaktierung des Metallbelags (5) der Leiterplatte (2).1. Housing for electronic assemblies with control elements arranged on a housing surface, in particular keyboards, characterized by
- a lower housing part (1) made of electrically conductive material with receptacles for electronic assemblies (4),
- A lid-like upper housing part in the form of a printed circuit board (2), the outer surface of which carries a continuous metal covering (5) and the lower surface facing the inside of the housing carries an electrically connected conductor pattern (6) with control elements (3) arranged on the printed circuit board (2),
- Contact elements (7) on the upper edges of the lower housing part (1) for separable contacting of the metal coating (5) of the printed circuit board (2). 2. Gehäuse nach Anspruch 1, dadurch gekenn­zeichnet, daß mindestens eine Kante der Leiterplatte (2) auf mindestens einem Abschnitt mit einem, mit dem Metall­belag (5) verbundenen Zinnbelag (8) versehen ist.2. Housing according to claim 1, characterized in that at least one edge of the circuit board (2) is provided on at least one section with a, with the metal coating (5) connected tin coating (8). 3. Gehäuse nach Anspruch 1 und 2, dadurch ge­kennzeichnet, daß am Rand des Gehäuseunterteils (1) Elemente (7) zur kraftschlüssigen Kontaktierung des Zinn­belags (8) angeordnet sind.3. Housing according to claim 1 and 2, characterized in that on the edge of the lower housing part (1) elements (7) for non-positive contacting of the tin covering (8) are arranged.
EP88111973A 1987-08-05 1988-07-25 Case for electronic plug-in units with control elements, especially for keyboards, arranged on one surface of the case Expired - Lifetime EP0302350B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8710740U DE8710740U1 (en) 1987-08-05 1987-08-05
DE8710740U 1987-08-05

Publications (3)

Publication Number Publication Date
EP0302350A2 true EP0302350A2 (en) 1989-02-08
EP0302350A3 EP0302350A3 (en) 1989-07-26
EP0302350B1 EP0302350B1 (en) 1992-01-08

Family

ID=6810828

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88111973A Expired - Lifetime EP0302350B1 (en) 1987-08-05 1988-07-25 Case for electronic plug-in units with control elements, especially for keyboards, arranged on one surface of the case

Country Status (2)

Country Link
EP (1) EP0302350B1 (en)
DE (2) DE8710740U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998039785A1 (en) * 1997-03-03 1998-09-11 Telefonaktiebolaget Lm Ericsson Electrostatic discharge protection in a portable communication device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5303113A (en) * 1992-03-30 1994-04-12 General Electric Company Digital circuit interrupter with RFI and EMI shielding
EP0633585B1 (en) * 1993-07-08 1997-11-05 Philips Patentverwaltung GmbH Housing for electric communication apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7402697U (en) * 1974-01-26 1974-04-25 Neumann Elektronik Gmbh Plastic housings for electrical equipment
DE7829133U1 (en) * 1978-09-30 1979-02-01 Standard Elektrik Lorenz Ag, 7000 Stuttgart
DE2948692A1 (en) * 1979-12-04 1981-06-11 Robert Bosch Gmbh, 7000 Stuttgart HF screening pot-shaped housing - has lug-shaped extension with inner thread in centre of bottom plate of rectangular or cubical section housing in screw connection
DE8520631U1 (en) * 1985-07-17 1986-03-06 Philips Patentverwaltung Gmbh, 2000 Hamburg Electrical combination module

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7402697U (en) * 1974-01-26 1974-04-25 Neumann Elektronik Gmbh Plastic housings for electrical equipment
DE7829133U1 (en) * 1978-09-30 1979-02-01 Standard Elektrik Lorenz Ag, 7000 Stuttgart
DE2948692A1 (en) * 1979-12-04 1981-06-11 Robert Bosch Gmbh, 7000 Stuttgart HF screening pot-shaped housing - has lug-shaped extension with inner thread in centre of bottom plate of rectangular or cubical section housing in screw connection
DE8520631U1 (en) * 1985-07-17 1986-03-06 Philips Patentverwaltung Gmbh, 2000 Hamburg Electrical combination module

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998039785A1 (en) * 1997-03-03 1998-09-11 Telefonaktiebolaget Lm Ericsson Electrostatic discharge protection in a portable communication device
US6207912B1 (en) 1997-03-03 2001-03-27 Telefonaktiebolaget Lm Ericsson Electrostatic discharge protection in a portable communication device
AU732251B2 (en) * 1997-03-03 2001-04-12 Telefonaktiebolaget Lm Ericsson (Publ) Electrostatic discharge protection in a portable communication device

Also Published As

Publication number Publication date
DE3867562D1 (en) 1992-02-20
EP0302350A3 (en) 1989-07-26
DE8710740U1 (en) 1988-09-08
EP0302350B1 (en) 1992-01-08

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