EP0727089A1 - Electromechanical component, especially relay, with sealed casing - Google Patents

Electromechanical component, especially relay, with sealed casing

Info

Publication number
EP0727089A1
EP0727089A1 EP95900056A EP95900056A EP0727089A1 EP 0727089 A1 EP0727089 A1 EP 0727089A1 EP 95900056 A EP95900056 A EP 95900056A EP 95900056 A EP95900056 A EP 95900056A EP 0727089 A1 EP0727089 A1 EP 0727089A1
Authority
EP
European Patent Office
Prior art keywords
base
elastomer
component according
sealing
edge
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
EP95900056A
Other languages
German (de)
French (fr)
Other versions
EP0727089B1 (en
Inventor
Lutz Kahlbau
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 EP0727089A1 publication Critical patent/EP0727089A1/en
Application granted granted Critical
Publication of EP0727089B1 publication Critical patent/EP0727089B1/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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/023—Details concerning sealing, e.g. sealing casing with resin
    • 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

Definitions

  • Electromechanical component in particular relay, with a sealed housing
  • the invention relates to an electromechanical component, in particular a relay, with a housing formed from a base and a cap, the base consisting of plastic having openings in which connection elements are anchored and sealed by insertion.
  • DE 25 56 610 B2 describes a base body made of insulating material for hermetically sealable relays, a base body made of thermosetting plastic being overmolded with a jacket made of thermoplastic material.
  • the connecting elements are embedded in the thermoset base body there, which already requires a complex manufacturing process.
  • an additional operation is proposed there, with which the parts are to be glued or welded.
  • the aim of the present invention is to design a component of the type mentioned in the introduction in such a way that sealing of the housing gaps and bushings, in particular on the connecting elements fastened by insertion, is achieved in a very simple and economical manner.
  • this goal is achieved in that the base consisting of a dimensionally stable plastic at least is coated in the wall areas of the openings with a layer of a thermoplastic elastomer and that the connecting elements have a larger cross section than the remaining width of the respective opening in such a way that they are anchored in a sealing manner by insertion with a press fit.
  • two plastic materials with different properties are therefore used at least for the base body or base carrying the connecting parts.
  • the plastic with the higher strength for example a mineral or glass fiber reinforced thermoplastic, such as polyamide, gives the shape stability, while the second material, namely a thermoplastic elastomer, such as. B. polyurethane, the sealing function.
  • the dimensionally stable plastic could also be a thermoset, but because of the more economical processing, it is more economical if two thermoplastics with different properties are used, since both materials can then be molded in succession on one and the same machine in a two-component injection molding process .
  • the inventive lining of the bushings for the connection elements results in a large-area sealing over the entire bushing length.
  • the seal is particularly advantageous and reliable when the elastomer layer encompasses both edges of the base openings in the manner of a spout.
  • the two plastic components will more or less bond to each other at their interfaces. Since the sealing is done by a press fit, this is not even necessary. It is therefore possible to use two plastics which are compatible and which do not bond to one another during molding; this applies in particular if the elastomer is positively connected to the base or base body, for example in the manner of the grommet mentioned.
  • the base or the cap is also provided with a layer of the elastomer.
  • the cap can also consist of metal, in which case the sealing function between plastic and metal is effective in the same way as on the metallic connection elements.
  • the cap will also be made of plastic, so that the second component made of elastomer for sealing the edge gap can be attached either to the base or to the cap.
  • the seal becomes particularly reliable when the base forms a circumferential sealing edge which is covered with a U-shaped elastomer layer and engages in a circumferential groove in the cap.
  • the elastomer layer can form one or more circumferential sealing ribs projecting into the edge gap.
  • the elastomer coating only needs to be provided in the area of the points to be sealed, so that the elastomer need only be injected in the form of an island at these points.
  • These connections can be designed in the form of webs which either lie in recessed channels in the base or can run as raised webs on the surface thereof.
  • FIG. 1 shows a relay base in a view from below
  • FIG. 2 shows a section II-II of the base from FIG. 1,
  • FIG. 3 shows an enlarged detail III from FIG. 2,
  • FIG. 4 shows a relay with a base according to FIG. 1, which is equipped with connection elements and provided with a cap,
  • FIG. 5 shows a section V-V from FIG. 4,
  • FIG. 6 shows an enlarged detail VI from FIG. 5.
  • a relay base 1 which, together with a cap 2, forms a housing which accommodates a relay system 3, which is indicated schematically in FIG.
  • This relay system 3 can be designed, for example, according to DE 34 28 595 C2.
  • the base shown in Figures 1 to 3 alone has openings 4 for pins 11 (see Figure 5), which are designed in the present case as a flat connector; the bushings are accordingly rectangular.
  • the base has a stepped, circumferential sealing edge 5.
  • the base itself consists of a dimensionally stable plastic, for example a glass fiber reinforced polyamide.
  • the inner walls 4a of the openings 4 are each covered with a layer 6 covered with an elastomer; polyurethane or a thermoplastic with similar properties can be considered as the material.
  • the ends of the elastomer layer 6 each extend over the edge of the opening 4 with a widened edge 7 in the form of a grommet.
  • the elastomer layer additionally forms a circumferential sealing lip 8.
  • the sealing edge 5 of the base 1 is also covered with an elastomer layer 9 which surrounds the edge 5 in a U-shaped profile on three sides. Two circumferential sealing ribs 10 are also formed on this elastomer layer 9.
  • FIGS. 4 to 6 show the same views as FIGS. 1 to 3, but now with the relay fully assembled, that is to say with the cap 2 in place and with the relay system 3 inserted.
  • the connecting pins 11 are in the openings 4 pressed in, due to an oversize in cross-section or the width 12 of the connecting pins 11, penetration with the elastomer layer 6 takes place, which leads to a press fit and to a corresponding sealing of the connecting pins 11.
  • the outwardly deformed sealing lips 8 nestle closely against the connecting pins 11.
  • the sealing edge 5 engages in a circumferential groove 13 and also forms a press fit for sealing the circumferential edge gap 15.
  • the sealing is thereby improved by the sealing ribs 10 acting in two mutually perpendicular directions.
  • connecting webs 14 are also indicated, which arise through flow channels in the injection mold. It is therefore elastomer webs that connect the different elastomer layers 6 and 9 in the form of recessed or raised webs, so that the number of injections in the injection mold can be lower. These connecting webs 14 can run on the inside of the housing and / or on the outside of the housing of the base 1.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Casings For Electric Apparatus (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

The component has a casing base (1) over which is coated with an elastomeric coating (6; 9) in the region of recesses (4) or of an edge gap (15) facing a cover (2). When connecting components (11) are pressed in or the cover (2) is pressed on, a good seal is thus obtained without any additional operations. The base may be made from two plastics with different properties according to the two-component injection moulding process.

Description

Elektromechanisches Bauelement, insbesondere Relais, mit dichtem GehäuseElectromechanical component, in particular relay, with a sealed housing
Die Erfindung betrifft ein elektromechanisches Bauelement, insbesondere ein Relais, mit einem aus einem Sockel und einer Kappe gebildeten Gehäuse, wobei der aus Kunststoff bestehende Sockel Durchbrüche aufweist, in welchen Anschlußelemente durch Einstecken verankert und abgedichtet sind.The invention relates to an electromechanical component, in particular a relay, with a housing formed from a base and a cap, the base consisting of plastic having openings in which connection elements are anchored and sealed by insertion.
Um ein elektromechanisches Bauelement, beispielsweise ein Re¬ lais gemäß DE 34 28 595 C2, in einem Kunststoffgehäuse gegen Feuchtigkeit und andere Umwelteinflüsse abzudichten, werden bereits verschiedene Verfahren angewandt, um einerseits die Kappe mit dem Sockel im Randbereich zu verkleben oder zu ver¬ schweißen und andererseits die Durchführungen der Anschlu߬ elemente mit Vergußmasse abzudichten. Diese herkömmlichen Verfahren sind jedoch verhältnismäßig aufwendig und unwirt¬ schaftlich.In order to seal an electromechanical component, for example a relay according to DE 34 28 595 C2, in a plastic housing against moisture and other environmental influences, various methods are already used, on the one hand to glue or weld the cap to the base in the edge area, and on the other hand, to seal the bushings of the connecting elements with potting compound. However, these conventional methods are relatively complex and uneconomical.
Aus der DE 26 17 633 AI ist eine Anordnung für ein elektrome¬ chanisches Bauteil der eingangs genannten Art bekannt, bei der die Öffnungen im Boden des Bauteiles mit am Sockel ange¬ spritzten Dichtlippen versehen sind, welche sich an die An- εchlußstifte eng anschmiegen sollen. Da diese Dichtlippen je¬ doch materialeinheitlich mit dem Sockel ausgebildet εind, ist der Erfolg der Abdichtung zweifelhaft. Denn entweder handelt es sich um ein weiches Sockelmaterial, so daß der Sockel den Kontaktelementen im Gehäuseinneren keine ausreichende Stabi¬ lität zu geben vermag, oder es handelt sich um einen formsta¬ bilen Kunststoff, der wiederum den Nachteil hat, daß die aus dem gleichen Material gebildeten Dichtlippen sich nicht weich genug an die Anschlußelemente anschmiegen, um zuverlässig ab¬ zudichten. Außerdem ergeben solche Dichtlippen für sich' al¬ lein nur eine mehr oder weniger linienförmige Abdichtung, die insbesondere bei Anschlußelementen mit rechteckigem Quer¬ schnitt, beispielsweise Flachsteckern, keine sichere Abdich¬ tung ermöglichen.An arrangement for an electromechanical component of the type mentioned at the outset is known from DE 26 17 633 A1, in which the openings in the base of the component are provided with sealing lips molded onto the base, which are intended to conform closely to the connecting pins . However, since these sealing lips are made of the same material as the base, the success of the sealing is doubtful. Because either it is a soft base material so that the base cannot give the contact elements inside the housing sufficient stability, or it is a dimensionally stable plastic, which in turn has the disadvantage that they are made of the same material formed sealing lips do not nestle softly enough on the connection elements to reliably seal. Moreover, such sealing lips, resulting in itself 'al¬ lein only a more or less linear seal the in particular with connection elements with a rectangular cross-section, for example flat plugs, do not permit secure sealing.
Dichtlippen im Randspalt zwischen Grundkörper und Kappe sind andererseits bereits in der DE-OS 23 20 617 vorgeschlagen; allerdings geht es dort nur um eine Vorabdichtung, mit der erreicht werden soll, daß die später einzubringende Vergu߬ masse nicht in das Gehäuse läuft.Sealing lips in the edge gap between the base body and the cap, on the other hand, have already been proposed in DE-OS 23 20 617; however, it is only a question of a preliminary seal which is intended to ensure that the casting compound to be introduced later does not run into the housing.
Aus der DE 33 19 329 AI ist ein Relais mit waschdichter Bo¬ denplatte bekannt, bei dem Vergußmasse in dem Zwischenraum zwischen Schlitzen der Bodenplatte und eingesteckten An- εchlußstiften eingegossen wird. Damit ist der eingangs ange- deutete Nachteil verbunden, daß die zusätzliche Vergußmasse mit aufwendigen Arbeitsgängen verteilt und später ausgehärtet werden muß.From DE 33 19 329 AI a relay with a wash-proof base plate is known, in which casting compound is poured into the space between the slots in the base plate and the inserted connecting pins. This is associated with the disadvantage indicated at the outset that the additional casting compound has to be distributed in complex work steps and later hardened.
In der DE 25 56 610 B2 ist schließlich ein aus Isolierstoff bestehender Grundkörper für hermetisch abdichtbare Relais be¬ schrieben, wobei ein Grundkörper aus Duroplast mit einem Man¬ tel aus thermoplastischem Material umspritzt wird. Die An¬ schlußelemente sind allerdings dort in den duroplastischen Grundkörper eingebettet, was bereits einen aufwendigen Her- Stellungsvorgang bedingt. Zur Abdichtung zwischen dem ther¬ moplastischen Mantel und der Kappe wird dort ein zusätzlicher Arbeitsgang vorgeschlagen, mit dem die Teile verklebt oder verschweißt werden sollen.Finally, DE 25 56 610 B2 describes a base body made of insulating material for hermetically sealable relays, a base body made of thermosetting plastic being overmolded with a jacket made of thermoplastic material. However, the connecting elements are embedded in the thermoset base body there, which already requires a complex manufacturing process. For sealing between the thermoplastic jacket and the cap, an additional operation is proposed there, with which the parts are to be glued or welded.
Ziel der vorliegenden Erfindung ist es, ein Bauelement der eingangs genannten Art so zu gestalten, daß eine Abdichtung der Gehäusespalte und -durchführungen, insbesondere an den durch Einstecken befestigten Anschlußelementen, auf sehr ein¬ fache und wirtschaftliche Weise erreicht wird.The aim of the present invention is to design a component of the type mentioned in the introduction in such a way that sealing of the housing gaps and bushings, in particular on the connecting elements fastened by insertion, is achieved in a very simple and economical manner.
Erfindungsgemäß wird dieses Ziel dadurch erreicht, daß der aus einem formstabilen Kunststoff bestehende Sockel zumindest in den Wandbereichen der Durchbrüche mit einer Schicht eines thermoplastischen Elastomers überzogen ist und daß die An¬ schlußelemente einen gegenüber der verbleibenden Weite des jeweiligen Durchbruchs größeren Querschnitt derart aufweisen, daß sie durch das Einstecken mit Preßsitz abdichtend veran¬ kert werden.According to the invention, this goal is achieved in that the base consisting of a dimensionally stable plastic at least is coated in the wall areas of the openings with a layer of a thermoplastic elastomer and that the connecting elements have a larger cross section than the remaining width of the respective opening in such a way that they are anchored in a sealing manner by insertion with a press fit.
Bei der Erfindung werden also zumindest für den die Anschlu߬ teile tragenden Grundkörper oder Sockel zwei Kunststoff ate- rialien mit unterschiedlichen Eigenschaften eingesetzt. Der Kunststoff mit der höheren Festigkeit, beispielsweise ein mi- neral- oder glasfaserverstärkter Thermoplast, wie Polyamid, gibt die Formstabilität, während das zweite Material, nämlich ein thermoplastisches Elastomer, wie z. B. Polyurethan, die Dichtfunktion übernimmt. Grundsätzlich könnte zwar der form¬ stabile Kunststoff auch ein Duroplast sein, doch ist es wegen der wirtschaftlicheren Verarbeitung günstiger, wenn zwei Thermoplaste mit unterschiedlichen Eigenschaften eingesetzt werden, da dann beide Materialien auf ein und derselben Ma- schine im Zweikomponenten-Spritzgießverfahren nacheinander ausgeformt werden können. Da somit bereits durch die Herstel¬ lung des Grundkörpers bzw. Sockels mit zwei Kunststoffko po- nenten die Dichtfunktion integriert ist, bedarf es nach dem Zusammenstecken der Teile keines zusätzlichen Montage- und Abdichtauf andes. Die Toleranz der Fügeteile wird durch das Elastomer ausgeglichen, so daß immer ein Preßsitz gewährlei¬ stet ist.In the invention, two plastic materials with different properties are therefore used at least for the base body or base carrying the connecting parts. The plastic with the higher strength, for example a mineral or glass fiber reinforced thermoplastic, such as polyamide, gives the shape stability, while the second material, namely a thermoplastic elastomer, such as. B. polyurethane, the sealing function. In principle, the dimensionally stable plastic could also be a thermoset, but because of the more economical processing, it is more economical if two thermoplastics with different properties are used, since both materials can then be molded in succession on one and the same machine in a two-component injection molding process . Since the sealing function is thus already integrated in the manufacture of the base body or base with two plastic components, no additional assembly and sealing is required after the parts have been plugged together. The tolerance of the parts to be joined is compensated for by the elastomer, so that an interference fit is always guaranteed.
Im Gegensatz zu der zweifelhaften Abdichtung von dünnen Dichtlippen ergibt die erfindungsgemäße Auskleidung der Durchführungen für die Anschlußelemente eine großflächige Ab¬ dichtung über die gesamte Durchführungslänge. Besonders vor¬ teilhaft und zuverlässig ist die .Abdichtung dann, wenn die Elastomerschicht jeweils beide Ränder der Sockeldurchbrüche nach Art einer Tülle umgreift. Zusätzlich kann es von Vorteil sein, wenn die Elastomerschicht im Bereich des Randes des je- weiligen Sockeldurchbruches an der Gehäuseaußenseite eine zu¬ sätzliche, umlaufende Dichtlippe bildet.In contrast to the dubious sealing of thin sealing lips, the inventive lining of the bushings for the connection elements results in a large-area sealing over the entire bushing length. The seal is particularly advantageous and reliable when the elastomer layer encompasses both edges of the base openings in the manner of a spout. In addition, it can be advantageous if the elastomer layer in the area of the edge of the because of the base opening on the outside of the housing forms an additional circumferential sealing lip.
In der Regel werden sich die beiden Kunststoffkomponenten an ihren Grenzflächen mehr oder weniger miteinander verbinden. Da die Abdichtung über Preßsitz erfolgt, ist dies jedoch nicht einmal notwendig. Es können also zwei in kompatible Kunststoffe verwendet werden, die sich beim Ausformen nicht miteinander verbinden; dies gilt besonders dann, wenn das Elastomer formschlüssig mit dem Sockel bzw. Grundkörper ver¬ bunden ist, etwa nach Art der erwähnten Tülle.As a rule, the two plastic components will more or less bond to each other at their interfaces. Since the sealing is done by a press fit, this is not even necessary. It is therefore possible to use two plastics which are compatible and which do not bond to one another during molding; this applies in particular if the elastomer is positively connected to the base or base body, for example in the manner of the grommet mentioned.
In vorteilhafter Ausgestaltung ist weiterhin vorgesehen, daß im Bereich eines Randspaltes zwischen dem Sockel und der Kappe jeweils der Sockel oder die Kappe ebenfalls mit einer Schicht des Elastomers versehen ist. Grundsätzlich kann die Kappe auch aus Metall bestehen, wobei dann die Abdichtfunk- tion zwischen Kunststoff und Metall in der gleichen Weise wirksam wird wie an den metallischen Anschlußelementen. In der Regel wird die Kappe jedoch auch aus Kunststoff bestehen, so daß die aus Elastomer gebildete zweite Komponente zur Ab¬ dichtung des Randspaltes wahlweise am Sockel oder an der Kappe angebracht sein kann. Besonders zuverlässig wird die Abdichtung dann, wenn der Sockel einen umlaufenden Dichtungs- rand bildet, der mit einer im Profil U-förmigen Elastomer¬ schicht überzogen ist und in eine umlaufende Nut der Kappe eingreift. Selbstverständlich ist auch eine umgekehrte Ge¬ staltung der Teile mit der gleichen Wirkung ausführbar. Wei¬ terhin kann die Elastomerschicht eine oder mehrere in den Randspalt vorstehende, umlaufende Dichtrippen bilden.In an advantageous embodiment, it is further provided that in the region of an edge gap between the base and the cap, the base or the cap is also provided with a layer of the elastomer. In principle, the cap can also consist of metal, in which case the sealing function between plastic and metal is effective in the same way as on the metallic connection elements. As a rule, however, the cap will also be made of plastic, so that the second component made of elastomer for sealing the edge gap can be attached either to the base or to the cap. The seal becomes particularly reliable when the base forms a circumferential sealing edge which is covered with a U-shaped elastomer layer and engages in a circumferential groove in the cap. Of course, an inverted configuration of the parts can also be carried out with the same effect. Furthermore, the elastomer layer can form one or more circumferential sealing ribs projecting into the edge gap.
Grundsätzlich braucht der Elastomerüberzug lediglich im Be¬ reich der abzudichtenden Stellen vorgesehen zu werden, so daß das Elastomer inselförmig nur an diesen Stellen eingespritzt zu werden braucht. Es kann jedoch von Vorteil sein, mehrere dieser Stellen untereinander über Stege zu verbinden, um die Zahl der Anspritzungen iri der Spritzgießform zu vermindern. Diese Verbindungen können in Form von Stegen ausgebildet sein, die entweder in vertieften Kanälen des Sockels liegen oder als erhabene Stege auf dessen Oberfläche verlaufen kön¬ nen.Basically, the elastomer coating only needs to be provided in the area of the points to be sealed, so that the elastomer need only be injected in the form of an island at these points. However, it can be advantageous to connect a plurality of these points to one another via webs in order to reduce the number of injections in the injection mold. These connections can be designed in the form of webs which either lie in recessed channels in the base or can run as raised webs on the surface thereof.
Die Erfindung wird nachfolgend an einem Ausführungsbeispiel anhand der Zeichnung näher erläutert. Es zeigtThe invention is explained in more detail using an exemplary embodiment with reference to the drawing. It shows
Figur 1 einen Relaissockel in einer Ansicht von unten,FIG. 1 shows a relay base in a view from below,
Figur 2 einen Schnitt II-II des Sockels von Figur 1,FIG. 2 shows a section II-II of the base from FIG. 1,
Figur 3 ein vergrößertes Detail III aus Figur 2,FIG. 3 shows an enlarged detail III from FIG. 2,
Figur 4 ein Relais mit einem Sockel gemäß Figur 1, der mit Anschlußelementen bestückt und mit einer Kappe versehen ist,FIG. 4 shows a relay with a base according to FIG. 1, which is equipped with connection elements and provided with a cap,
Figur 5 einen Schnitt V-V aus Figur 4,FIG. 5 shows a section V-V from FIG. 4,
Figur 6 ein vergrößertes Detail VI aus Figur 5.FIG. 6 shows an enlarged detail VI from FIG. 5.
In den Figuren ist ein Relaissockel 1 gezeigt, der zusammen mit einer Kappe 2 ein Gehäuse bildet, das ein in Figur 5 mit schematisch angedeutetes Relaissystem 3 aufnimmt. Dieses Re- laissystem 3 kann beispielsweise gemäß DE 34 28 595 C2 ausge¬ bildet sein.In the figures, a relay base 1 is shown which, together with a cap 2, forms a housing which accommodates a relay system 3, which is indicated schematically in FIG. This relay system 3 can be designed, for example, according to DE 34 28 595 C2.
Der in den Figuren 1 bis 3 allein gezeigte Sockel besitzt Durchbrüche 4 für Anschlußstifte 11 (siehe Figur 5) , welche im vorliegenden Fall als Flachstecker ausgebildet sind; dem¬ entsprechend sind die Durchführungen rechteckig. Außerdem be¬ sitzt der Sockel einen abgesetzten, umlaufenden Dichtungsrand 5. Der Sockel selbst besteht aus einem formstabilen Kunst¬ stoff, beispielsweise einem glasfaserverstärkten Polyamid.The base shown in Figures 1 to 3 alone has openings 4 for pins 11 (see Figure 5), which are designed in the present case as a flat connector; the bushings are accordingly rectangular. In addition, the base has a stepped, circumferential sealing edge 5. The base itself consists of a dimensionally stable plastic, for example a glass fiber reinforced polyamide.
Wie in Figur 3 in der Vergrößerung zu sehen ist, sind die In¬ nenwände 4a der Durchbrüche 4 jeweils mit einer Schicht 6 aus einem Elastomer überzogen; als Material kommt Polyurethan oder ein Thermoplast mit ähnlichen Eigenschaften in Betracht. Die Elastomerschicht 6 übergreift an ihren Enden jeweils mit einem verbreiterten Rand 7 in Form einer Tülle jeweils den Rand des Durchbruches 4. An dem zur Gehäuseaußenseite weisen¬ den Ende des Durchbruchs 4 bildet die Elastomerschicht zu¬ sätzlich eine umlaufende Dichtlippe 8.As can be seen in the enlargement in FIG. 3, the inner walls 4a of the openings 4 are each covered with a layer 6 covered with an elastomer; polyurethane or a thermoplastic with similar properties can be considered as the material. The ends of the elastomer layer 6 each extend over the edge of the opening 4 with a widened edge 7 in the form of a grommet. At the end of the opening 4 facing the housing outside, the elastomer layer additionally forms a circumferential sealing lip 8.
Der Dichtungsrand 5 des Sockels 1 ist ebenfalls mit einer Elastomerschicht 9 überzogen, die im Profil U-förmig den Rand 5 auf drei Seiten umgibt. Auf dieser Elastomerschicht 9 sind außerdem zwei umlaufende Dichtrippen 10 ausgebildet.The sealing edge 5 of the base 1 is also covered with an elastomer layer 9 which surrounds the edge 5 in a U-shaped profile on three sides. Two circumferential sealing ribs 10 are also formed on this elastomer layer 9.
Die Figuren 4 bis 6 zeigen die gleichen Ansichten wie die Fi- guren 1 bis 3, jedoch nunmehr mit vollständig montiertem Re¬ lais, also mit aufgesetzter Kappe 2 und mit eingesetztem Re¬ laissystem 3. Dabei sind die Anschlußstifte 11 in die Durch¬ brüche 4 eingepreßt, wobei aufgrund eines Übermaßes im Quer¬ schnitt bzw. der Breite 12 der Anschlußstifte 11 eine Durch- dringung mit der Elastomerschicht 6 erfolgt, die zu einem Preßεitz und zu einer entsprechenden Abdichtung der Anschlu߬ stifte 11 führt. Wie Figur 6 zeigt, schmiegen sich die nach außen verformten Dichtlippen 8 eng an die Anschlußstifte 11 an. Durch das Aufschnappen der Kappe 2 greift der Dichtungs- rand 5 in eine umlaufende Nut 13 und bildet hierbei ebenfalls einen Preßsitz zur Abdichtung des umlaufenden Randspaltes 15. Die Abdichtung wird dadurch durch die nach zwei zueinander senkrechten Richtungen wirkenden Dichtrippen 10 verbessert.FIGS. 4 to 6 show the same views as FIGS. 1 to 3, but now with the relay fully assembled, that is to say with the cap 2 in place and with the relay system 3 inserted. The connecting pins 11 are in the openings 4 pressed in, due to an oversize in cross-section or the width 12 of the connecting pins 11, penetration with the elastomer layer 6 takes place, which leads to a press fit and to a corresponding sealing of the connecting pins 11. As FIG. 6 shows, the outwardly deformed sealing lips 8 nestle closely against the connecting pins 11. By snapping the cap 2, the sealing edge 5 engages in a circumferential groove 13 and also forms a press fit for sealing the circumferential edge gap 15. The sealing is thereby improved by the sealing ribs 10 acting in two mutually perpendicular directions.
In den Figuren 1 und 4 sind außerdem noch Verbindungsstege 14 angedeutet, welche durch Fließkanäle in der Spritzgießform entstehen. Es sind also Elastomerstege, die die verschiedenen Elastomerschichten 6 und 9 in Form von vertieften oder erha¬ benen Stegen verbinden, so daß die Zahl der Anspritzungen in der Spritzgießform geringer sein kann. Diese Verbindungsstege 14 können an der Gehäuseinnenseite und/oder an der Gehäuseau¬ ßenseite des Sockels 1 verlaufen. In Figures 1 and 4, connecting webs 14 are also indicated, which arise through flow channels in the injection mold. It is therefore elastomer webs that connect the different elastomer layers 6 and 9 in the form of recessed or raised webs, so that the number of injections in the injection mold can be lower. These connecting webs 14 can run on the inside of the housing and / or on the outside of the housing of the base 1.

Claims

Patentansprüche claims
1. Elektromechanisches Bauelement, insbesondere Relais, mit einem aus einem Sockel (1) und einer Kappe (2) gebildeten Ge- häuse, wobei der aus Kunststoff bestehende Sockel Durchbrüche (4) aufweist, in welchen Anschlußelemente (11) durch Ein¬ stecken verankert und abgedichtet sind, dadurch gekennzeich¬ net, daß der aus einem formstabilen Kunststoff bestehende Sockel (1) zumindest in den Wandbereichen (4a) der Durchbrü- ehe (4) mit einer Schicht (6) eines thermoplastischen Elasto¬ mers überzogen ist und daß die Anschlußelemente (11) eine ge¬ genüber der verbleibenden Weite des jeweiligen Durchbruchs größeren Querschnitt (12) derart aufweisen, daß sie durch das Einstecken mit Preßsitz abdichtend verankert sind.1. Electromechanical component, in particular relay, with a housing formed from a base (1) and a cap (2), the base consisting of plastic having openings (4) in which connection elements (11) are anchored by insertion and are sealed, characterized in that the base (1) consisting of a dimensionally stable plastic is covered at least in the wall areas (4a) of the opening (4) with a layer (6) of a thermoplastic elastomer and that Connection elements (11) have a larger cross-section (12) than the remaining width of the respective opening in such a way that they are anchored in a sealing manner by insertion with a press fit.
2. Bauelement nach Anspruch 1, dadurch gekennzeichnet, daß die Elastomerschicht (6) nach Art einer Tülle mit verbreiter¬ tem Rand (7) die Ränder der Sockeldurchbrüche (4) umgreift.2. Component according to claim 1, characterized in that the elastomer layer (6) in the manner of a spout with a wider edge (7) engages around the edges of the base openings (4).
3. Bauelement nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Elastomerschicht (6) im Bereich des Randes des jewei¬ ligen Sockeldurchbruchs (4) an der Gehäuεeaußenseite eine um¬ laufende Dichtlippe (8) bildet.3. Component according to claim 1 or 2, characterized in that the elastomer layer (6) forms a circumferential sealing lip (8) in the region of the edge of the respective base opening (4) on the outside of the housing.
4. Bauelement nach einem der Ansprüche 1 bis 3, dadurch ge¬ kennzeichnet, daß im Bereich eines Randspaltes (15) zwischen dem Sockel und der Kappe jeweils der Sockel oder die Kappe ebenfalls mit einer Schicht (9) des Elastomerε verεehen ist.4. Component according to one of claims 1 to 3, characterized ge indicates that in the region of an edge gap (15) between the base and the cap each of the base or the cap is also provided with a layer (9) of the elastomer.
5. Bauelement nach Anspruch 4, dadurch gekennzeichnet, daß der Sockel (1) einen umlaufenden Dichtungsrand (5) bildet, der mit einer im Profil U-förmigen Elastomerschicht (9) über¬ zogen ist und in eine umlaufende Nut (13) der Kappe (2) ein¬ greift oder umgekehrt. 5. The component according to claim 4, characterized in that the base (1) forms a circumferential sealing edge (5) which is coated with a U-shaped elastomer layer (9) in profile and in a circumferential groove (13) of the cap (2) intervenes or vice versa.
6. Bauelement nach Anεpruch 4 oder 5, dadurch gekennzeichnet, daß die Elastomerschicht (9) eine oder mehrere in den Rand¬ spalt vorstehende, umlaufende Dichtrippen (10) bildet.6. The component according to claim 4 or 5, characterized in that the elastomer layer (9) forms one or more peripheral sealing ribs (10) projecting into the edge gap.
7. Bauelement nach einem der Ansprüche 1 bis 6, dadurch ge¬ kennzeichnet, daß der Sockel (1) mit der Elastomerbeschich- tung (6, 9) im Spritzgießverfahren durch Mehrkomponentenum- spritzung gewonnen ist.7. Component according to one of claims 1 to 6, characterized ge indicates that the base (1) with the elastomer coating (6, 9) is obtained by injection molding by multi-component extrusion coating.
8. Bauelement nach einem der Ansprüche 1 bis 7, dadurch ge¬ kennzeichnet, daß die Elastomerbeschichtungen (6, 9) von meh¬ reren Durchbrüchen (4) bzw. am Dichtungsrand (5) untereinan¬ der über Verbindungsstege (14) aus dem Elastomermaterial ver¬ bunden sind. 8. Component according to one of claims 1 to 7, characterized ge indicates that the elastomer coatings (6, 9) of several openings (4) or at the sealing edge (5) with one another via connecting webs (14) made of the elastomer material are connected.
EP95900056A 1993-11-03 1994-11-02 Electromechanical component, especially relay, with sealed casing Expired - Lifetime EP0727089B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4337505A DE4337505C1 (en) 1993-11-03 1993-11-03 Electromechanical component, in particular relay, with a sealed housing
DE4337505 1993-11-03
PCT/DE1994/001289 WO1995012890A1 (en) 1993-11-03 1994-11-02 Electromechanical component, especially relay, with sealed casing

Publications (2)

Publication Number Publication Date
EP0727089A1 true EP0727089A1 (en) 1996-08-21
EP0727089B1 EP0727089B1 (en) 1997-05-14

Family

ID=6501692

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95900056A Expired - Lifetime EP0727089B1 (en) 1993-11-03 1994-11-02 Electromechanical component, especially relay, with sealed casing

Country Status (8)

Country Link
US (1) US5699899A (en)
EP (1) EP0727089B1 (en)
JP (1) JPH09504639A (en)
AT (1) ATE153175T1 (en)
CA (1) CA2175592A1 (en)
CZ (1) CZ121596A3 (en)
DE (2) DE4337505C1 (en)
WO (1) WO1995012890A1 (en)

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US6040539A (en) * 1998-01-08 2000-03-21 Hiegel; Todd N. Protective cover for a computer mouse
JP4312350B2 (en) 2000-06-06 2009-08-12 ウチヤ・サーモスタット株式会社 Thermal protector
DE102007012296A1 (en) * 2007-03-08 2008-09-11 Siemens Ag Disconnecting device and method for producing a separation switching device
DE102015225099A1 (en) * 2015-12-14 2017-06-14 Robert Bosch Gmbh Electronic module, in particular for transmission control unit, and method for manufacturing such
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Also Published As

Publication number Publication date
US5699899A (en) 1997-12-23
CA2175592A1 (en) 1995-05-11
ATE153175T1 (en) 1997-05-15
JPH09504639A (en) 1997-05-06
DE4337505C1 (en) 1995-03-30
DE59402780D1 (en) 1997-06-19
EP0727089B1 (en) 1997-05-14
WO1995012890A1 (en) 1995-05-11
CZ121596A3 (en) 1997-12-17

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