EP0600943A1 - Partie boitier pour un circuit electrique a proteger contre les substances nocives, par exemple un circuit pour un systeme de fermeture d'un vehicule a moteur. - Google Patents

Partie boitier pour un circuit electrique a proteger contre les substances nocives, par exemple un circuit pour un systeme de fermeture d'un vehicule a moteur.

Info

Publication number
EP0600943A1
EP0600943A1 EP92916952A EP92916952A EP0600943A1 EP 0600943 A1 EP0600943 A1 EP 0600943A1 EP 92916952 A EP92916952 A EP 92916952A EP 92916952 A EP92916952 A EP 92916952A EP 0600943 A1 EP0600943 A1 EP 0600943A1
Authority
EP
European Patent Office
Prior art keywords
housing part
housing
pressure body
motor vehicle
plastic
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
EP92916952A
Other languages
German (de)
English (en)
Other versions
EP0600943B1 (fr
Inventor
Josef Gleixner
Josef Dirmeyer
Klaus Mayer
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 EP0600943A1 publication Critical patent/EP0600943A1/fr
Application granted granted Critical
Publication of EP0600943B1 publication Critical patent/EP0600943B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H01H13/02—Details
    • H01H13/04—Cases; Covers
    • H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
    • G05G1/02—Controlling members for hand actuation by linear movement, e.g. push buttons
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00944—Details of construction or manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
    • H01H2009/048—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings using a sealing boot, e.g. the casing having separate elastic body surrounding the operating member and hermetically closing the opening for it
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/002—Casings sealed

Definitions

  • Housing part for an electrical circuit arrangement to be protected against pollutants e.g. a vehicle locking system.
  • the invention was initially developed for the buttons on the handheld transmitter of a remote-controlled motor vehicle locking system. The new development of the buttons on a vehicle on-board computer was also considered. The invention is also particularly suitable for these two cases. However, it finally turned out that the invention is also suitable for many other applications, especially in those in which it is against the tightness of a housing which contains circuit arrangements, in a reliable manner, especially in mass production, which is easily and inexpensively achievable Pollutants arrive.
  • the invention is based on the object defined in the preamble of claim 1, which is generally known per se.
  • a major problem with the housings of such circuit arrangements is often the sensitivity of their electronic components to environmental influences, in particular to moisture or water, but also to contamination. Critical is among other things the tightness between the buttons and the housing, because harmful substances can penetrate through the gaps between the buttons and the adjacent housing part.
  • Such keys generally contain a probe body or pressure body, which is used to actuate a switch that controls the circuit arrangement, especially when the switch contains metallic contacts.
  • the scarf can also be a different type of scarf act ter, which are to be operated via the feeler or pressure body.
  • pressure bodies we will only speak of "pressure bodies” in the following, although the pressure required for actuation can in principle also be so small that one could speak of "probe bodies”.
  • the pressure bodies are made of a soft elastic material, e.g. Made of rubber, silicone or TPE and then glued to the hard housing at their edges or on all-round protruding collars or brims, where they are often additionally clamped tightly by means of webs, clips, tabs, etc., in order to achieve the desired tightness.
  • the outer surface of the edge of the pressure body is additionally given a complicated notched or grooved shape and then the pressure body is pressed into the hole in the housing part in such a way that the complicatedly shaped edge is pressed against the circumference of the hole in order to achieve effects similar to those of labyrinth seals.
  • the pressure hulls are made of hard material without the watertightness between the key body and the housing. Instead, there is a space under the pressure elements, often also under the switches, which is unprotected against the harmful substances, but which in turn has a wall with a sealing membrane as a seal against the electronics inside the housing.
  • thermoplastic materials which have been welded to hard thermoplastic materials or in the liquid or pasty state were pressed together, adhere well to each other after cooling, although they are two different materials with different properties.
  • both figures each show a section of the housing G, which is made of hard thermoplastic or at least formed with the help of hard thermoplastic.
  • This can be, for example, the housing of a handheld transmitter of a remotely controllable motor vehicle central locking system which is known and works on an infrared or radio basis.
  • a pressure body D made of soft thermoplastic material and accessible from outside the housing G is fastened to the housing part G shown.
  • This pressure element D is used to actuate - in the example shown only one single electrical switch which has already been fitted inside the housing I or which is to be fitted later, cf. the switch S in FIG. 1, which additionally contains a key body T as an example, and cf. the switch C / L in Figure 2, the example
  • a conductive covering C which on the extension T is e.g. depends on a thickening T, which in turn forms a section of the pressure body D on its inner surface, that is to say in turn also consists of soft thermoplastic material, and also consists of the end sections of lines L on a printed circuit board A which is attached to the interior I of the housing G.
  • edges R of the pressure element D cover the hole made for the switch actuation in the housing part G in a completely waterproof and adhesive-free manner in the manner according to the invention. This is achieved in that these edges R are sprayed directly onto the plastic of the housing part G in such a way that the soft thermoplastic sprayed onto the housing part G by D such that the edges R abut the inner surface of the housing part G, cf. the figure 2.
  • the pressure body D can have a conductive coating C as a contact surface of the switch S at least more or less in the middle of its inner surface.
  • This covering C can e.g. consist of metal or a silver-containing graphite mass and cover a more or less large section of the inner surface of the pressure body D.
  • This covering C is located at a point such that when the end user presses the pressure body D, the two lines L, e.g. 2 are mounted on a printed circuit board A, are bridged by the conductive coating C and thus the switching path of this switch C / L is conductive.
  • the pressure body D can more or less in the middle of its inner surface an extension T or towards the switch C / L, S Have thickening T, cf. FIG. 2.
  • This can often also be the distance between the outer surface of the pressure body D and a circuit board A, which is in the housing of the pressure body D and the hard thermoplastic plastic of the housing part G are fused to one another in a watertight manner on the plastic of the housing part G at their contacting interfaces.
  • the reliable tightness between the housing G and its keys D / S or D / C / L is achieved with particularly little effort, above all without the need for adhesive between the interfaces.
  • the principle according to the invention is particularly suitable for the mass production of such housings G.
  • the hardness of the plastic housing not only gives the housing G the required rigidity and strength if it is the handheld transmitter of a motor vehicle locking system, e.g. of a motor vehicle central locking system, so if this housing G has the particularly water-sensitive or moisture-sensitive electronic transmitter components in its interior I - cf. the processor P shown symbolically therefor, the button structure D / S or D / C / L containing the switch then being used to control the transmitter.
  • the hardness of the plastic housing gives the housing G the often very desirable rigidity and strength even if the housing G contains other circuit arrangements, e.g. the - among other things moisture-sensitive - on-board computer of the motor vehicle, or if the - portable or permanently installed - housing G also contains any other circuit arrangements.
  • the edges R of the pressure body D attached to the outer surface of the housing part G achieve a fairly robust connection between the plastics of the housing part G and the pressure body D.
  • the finished structure G / D is subjected to particularly high mechanical stress later on - for example if the structure belongs to the hand-held transmitter of the motor vehicle locking system and the keychain in the pocket of a driver could scratch the edge R - then the robustness can prevent accidental damage the fusion of the edge R with the housing part G can also be further increased in that the pressure body inner I as a carrier of the circuit arrangement, cf. P, can be attached, enlarged accordingly.
  • the housing part G can be held by a holding body corresponding to the shape of the housing G at the moment when the pressure body D is injection molded by an injection molding machine.
  • the housing part G can e.g. be held as a prefabricated body by the holding body.
  • the housing part G and the pressure body D can also be produced by means of a tool body, each with its own mold cavity for the housing part G and for the pressure body D, by spraying both parts G and D more or less simultaneously. Then the mold cavity intended for the housing part G simultaneously represents, so to speak, the holding body for this housing part G.
  • the invention therefore also has the advantage of permitting very different processes for their production, so that the production can be easily adapted to the conditions prevailing in the workshops.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Manufacturing & Machinery (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Lock And Its Accessories (AREA)
  • Push-Button Switches (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

Partie boîtier (G) en matière thermoplastique dure pour un circuit électrique à protéger contre les substances nocives, par exemple un circuit électrique d'un système de fermeture d'un véhicule à moteur, avec au moins un poussoir (D) accessible de l'extérieur du boîtier, chacun de ces poussoirs servant à actionner au moins un interrupteur électrique (S, C/L) disposé ou à disposer à l'intérieur (I) du boîtier. Les bords (R) du poussoir (D) réalisé en matière thermoplastique molle recouvrent un orifice dans la partie boîtier (G) selon une disposition entièrement étanche et réalisée sans adhésif, par le fait que ces bords (R) sont appliqués directement sur la matière plastique de la partie boîtier (G) de sorte que la matière plastique du poussoir (D) et la matière plastique de la partie boîtier (G) soient fondues ensemble.
EP92916952A 1991-08-29 1992-08-13 Partie boitier pour un circuit electrique a proteger contre les substances nocives, par exemple un circuit pour un systeme de fermeture d'un vehicule a moteur Expired - Lifetime EP0600943B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4128778 1991-08-29
DE4128778A DE4128778A1 (de) 1991-08-29 1991-08-29 Gehaeuseteil fuer eine vor schadstoffen zu schuetzende elektrische schaltungsanordnung z. b. eines kfz-schliesssystemes
PCT/DE1992/000681 WO1993005526A1 (fr) 1991-08-29 1992-08-13 Partie boitier pour un circuit electrique a proteger contre les substances nocives, par exemple un circuit pour un systeme de fermeture d'un vehicule a moteur

Publications (2)

Publication Number Publication Date
EP0600943A1 true EP0600943A1 (fr) 1994-06-15
EP0600943B1 EP0600943B1 (fr) 1995-04-19

Family

ID=6439456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92916952A Expired - Lifetime EP0600943B1 (fr) 1991-08-29 1992-08-13 Partie boitier pour un circuit electrique a proteger contre les substances nocives, par exemple un circuit pour un systeme de fermeture d'un vehicule a moteur

Country Status (4)

Country Link
US (1) US5489754A (fr)
EP (1) EP0600943B1 (fr)
DE (2) DE4128778A1 (fr)
WO (1) WO1993005526A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
DE19528574A1 (de) * 1995-08-03 1997-02-06 Siemens Ag Schaltvorrichtung

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DE19700848C1 (de) * 1997-01-13 1998-04-16 Siemens Ag Elektrische Schalteinrichtung
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DE29707574U1 (de) * 1997-04-26 1997-07-10 Mannesmann VDO AG, 60388 Frankfurt Alphanumerische Tastatur für Kraftfahrzeuge
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DE10027357C2 (de) * 2000-06-02 2003-04-17 Tyco Electronics Gmbh Wien Relais mit Handbetätigungseinrichtung und Taste
JP3419388B2 (ja) * 2000-07-17 2003-06-23 日本電気株式会社 操作キーを備えた電子機器およびその製造方法
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DE10214025B4 (de) * 2002-03-27 2004-04-15 Huf Hülsbeck & Fürst Gmbh & Co. Kg Verfahren und Vorrichtung zum Herstellen eines abgedichteten Schließelements, insbesondere eines elektronischen Schlüssels für Kraftfahrzeuge
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DE102007052849A1 (de) * 2007-11-06 2009-05-20 Trw Automotive Safety Systems Gmbh Teilweise verchrombare Vorrichtung und Verfahren zu deren Herstellung
CN101465224B (zh) * 2007-12-21 2012-06-13 深圳富泰宏精密工业有限公司 按键结构
JP5913873B2 (ja) * 2011-09-06 2016-04-27 オムロン株式会社 トリガスイッチ
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Publication number Priority date Publication date Assignee Title
DE19528574A1 (de) * 1995-08-03 1997-02-06 Siemens Ag Schaltvorrichtung

Also Published As

Publication number Publication date
EP0600943B1 (fr) 1995-04-19
US5489754A (en) 1996-02-06
DE59201985D1 (de) 1995-05-24
WO1993005526A1 (fr) 1993-03-18
DE4128778A1 (de) 1993-03-04

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