WO2000007204A2 - Electromagnetic relay - Google Patents

Electromagnetic relay Download PDF

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Publication number
WO2000007204A2
WO2000007204A2 PCT/DE1999/002322 DE9902322W WO0007204A2 WO 2000007204 A2 WO2000007204 A2 WO 2000007204A2 DE 9902322 W DE9902322 W DE 9902322W WO 0007204 A2 WO0007204 A2 WO 0007204A2
Authority
WO
WIPO (PCT)
Prior art keywords
armature
contact
spring
contact spring
relay according
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.)
Ceased
Application number
PCT/DE1999/002322
Other languages
German (de)
French (fr)
Other versions
WO2000007204A3 (en
Inventor
Michael Dittmann
Jens Heinrich
Rainer Vogel
Titus Ziegler
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.)
TE Connectivity Solutions GmbH
Siemens Electromechanical Components GmbH and Co KG
Original Assignee
Tyco Electronics Logistics AG
Siemens Electromechanical Components GmbH and Co KG
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
Priority claimed from DE1999113903 external-priority patent/DE19913903C1/en
Application filed by Tyco Electronics Logistics AG, Siemens Electromechanical Components GmbH and Co KG filed Critical Tyco Electronics Logistics AG
Publication of WO2000007204A2 publication Critical patent/WO2000007204A2/en
Publication of WO2000007204A3 publication Critical patent/WO2000007204A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/40—Contact mounted so that its contact-making surface is flush with adjoining insulation
    • H01H1/403—Contacts forming part of a printed circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/14—Terminal arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/24—Parts rotatable or rockable outside coil
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/548—Contact arrangements for miniaturised relays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/60—Contact arrangements moving contact being rigidly combined with movable part of magnetic circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H01H51/2272—Polarised relays comprising rockable armature, rocking movement around central axis parallel to the main plane of the armature
    • H01H51/2281—Contacts rigidly combined with armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5805—Connections to printed circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/021—Bases; Casings; Covers structurally combining a relay and an electronic component, e.g. varistor, RC circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H01H51/2272—Polarised relays comprising rockable armature, rocking movement around central axis parallel to the main plane of the armature
    • H01H51/2281—Contacts rigidly combined with armature
    • H01H51/229—Blade-spring contacts alongside armature

Definitions

  • the invention relates to an electromagnetic relay, which has a magnet system, an armature, a contact spring and movable and fixed contacts.
  • the contact spring is punched out of metal strips and overmolded with plastic.
  • the movable contacts are attached to the stamped metal strip by resistance or laser welding.
  • the conventional relays have the disadvantage that punching metal strips causes high tool costs.
  • the use of metal tape requires little flexibility with regard to the spring characteristics. Because of the complex punching tools, the shape of the springs is also very limited. In addition, the metal strips warp during punching; a problem that is all the more serious the thinner the tapes used in increasingly miniaturized relays.
  • the subsequent welding process also leads to a further deformation of the springs. This results in a large spread in the dimensions of the relay springs, which results in a high probability of failure of the relays and thus leads to a high scrap in production. After assembling the relays, these are z. B. assembled by reflow soldering.
  • Thermoplastic materials commonly used in overmolding have insufficient thermal stability compared to the temperatures that occur during reflow soldering. To improve the thermal load capacity, highly heat-resistant plastics are therefore used, which are extremely expensive.
  • the aim of the present invention is therefore to provide a relay in which the contact spring while avoiding high tooling and manufacturing costs and at the same time minimizing of the spread in the spring dimensions. In addition, an increased heat resistance of the springs is sought.
  • the invention consists in an electromagnetic relay which has a coil, a core passing through the coil and an elongated armature which forms at least one working air gap with the core. Furthermore, the relay has at least one band-shaped contact spring which rests on the armature and is connected to it.
  • the contact spring has at least one movable spring arm which carries a movable contact. Furthermore, the relay has at least one fixed contact which interacts with the movable contact and is fastened on an insulating support.
  • the contact spring is characterized in that it is formed by a flexible printed circuit board made of insulating material.
  • the relay By forming the contact spring according to the invention from a flexible printed circuit board, the relay can be manufactured by using standard technologies and materials of printed circuit board manufacture without expensive special stamping tools. Avoiding metal punches ensures that the springs retain their shape more accurately.
  • thermosetting plastics which are dimensionally stable up to temperatures above 200 ° C. are used particularly advantageously. This makes it easy to achieve thermal stability against the temperatures of around 200 ° C. or higher that occur during reflow soldering.
  • an advantageous embodiment of the invention is that the movable contacts as selective PCB surfaces coated with contact material are formed.
  • Such selective coating of the printed circuit board can be done, for example, by electroplating. Because the contacts are not welded onto the contact springs, they cannot warp so easily, which greatly reduces the spread in the spring dimensions.
  • the movable contacts can be designed as solid contacts that are pressed or riveted into the contact spring. It is also possible to attach the movable contacts to the contact spring using conductive adhesive or solder. In both cases, welding can be omitted in particular.
  • one-layer or multi-layer flexible printed circuit boards can advantageously be used, depending on the availability and required spring characteristics.
  • an embodiment is particularly advantageous in which the armature is designed as a rocker armature and in which the armature spring carrying the armature and the contact spring are formed in one piece from a spring which rests on a support fastened to the base element. The distances between movable and fixed contacts and the contact lift can thus be easily adjusted by the thickness of the support.
  • the spring stiffness of the armature spring can be adjusted in a particularly simple and thus advantageous manner by depositing the flexible printed circuit board with spring strips.
  • the use of preformed spring semi-finished products in the form of a strip for reinforcing the printed circuit board means that expensive special stamping tools can be dispensed with.
  • Figure 1 shows an inventive relay with rocker armature in schematic cross section.
  • FIG. 2 shows an example of a design of the contact spring from FIG. 1.
  • FIG. 3 shows the closed contact from FIG. 1 along the line III-III in a schematic cross section.
  • Figure 1 shows an inventive relay with rocker armature. It consists of a coil 1 which is wound around a coil former 17. A core 2 passes through the coil former 17. A three-pole permanent magnet 3 is arranged between the yoke legs of the core 2. The magnet system is overmolded with a relay sheath 15. Furthermore, the relay has an elongated armature 4, on the underside of which a flexible circuit board 6 forming the contact spring is fastened. The movable contacts 5 are arranged on the flexible printed circuit board 6. These can, for example, be applied galvanically to conductor tracks 7 of the printed circuit board 6. The flexible circuit board 6 has transversely outwardly projecting arms 11 (FIG.
  • the arms are backed with a metal spring strip 16.
  • the movable contacts 5 cooperate with fixed contacts 9 which are fastened on the carrier 8.
  • the carrier 8 is designed as a plated-through rigid printed circuit board. Solder balls 14 are arranged on the outside of the carrier and act as connection elements for the fixed contacts 9 and for the contact spring 6. They are connected by means of plated-through holes 9b via conductor tracks 9a on the upper side of the rigid printed circuit board or directly to the fixed contacts 9.
  • the relay casing 15 is fastened, for example, by gluing to the carrier 8.
  • FIG. 2 shows the design of the contact spring from FIG. 1.
  • the flexible printed circuit board 6 has a section 18 connected to the armature 4, to the rear of which the armature 4 is glued. It also has movable spring arms 12 on which the movable contacts 5 arranged on conductor tracks 7 are arranged. The conductor tracks 7 are used for contacting the movable contacts 5.
  • the spring arms 12 of the circuit board 6 are partially separated from the section 18 connected to the armature 4 by incisions running along an edge section of the armature 4. As a result, the spring arms 12 can move out of the plane of the armature 4, as a result of which a contact overstroke occurs.
  • the flexible printed circuit board 6 also has two arms 11 which project transversely outwards and run along the pivot axis 10 of the armature. These arms 11 act as a torsion spring and rest on the support 13 ( Figure 1).
  • FIG. 3 shows the closed contact from FIG. 1 along the line AA in a schematic cross section.
  • the fixed contacts 9 and the solder balls 14, which serve as connection elements, are arranged on the carrier 8 towards the inside of the relay and towards the outside of the relay.
  • the armature 4 In the switching state of the relay, in which the contacts shown are closed, the armature 4 is in a position above the relay base 8, which is fixed by the armature 4 striking the core 2 (FIG. 1).
  • the spring arms 12 of the contact spring are located in a plane above the level of the section 16 of the contact spring connected to the armature 4 and at the same time bring the movable contacts 5 into contact with the fixed contacts 9.
  • the resilient connection between the spring arms 12 and the rest of the contact spring provides sure a contact force acts between the movable contact 5 and the fixed contact 9.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Relay Circuits (AREA)

Abstract

The invention relates to an electromagnetic relay, comprising a coil (1), a core (2), an armature (4), mobile and fixed contacts (5, 9), a contact spring (6) and a support (8). The contact spring consists of a flexible printed board.

Description

Beschreibungdescription

Elektromagnetisches RelaisElectromagnetic relay

Die Erfindung betrifft ein elektromagnetisches Relais, welches ein Magnetsystem, einen Anker, eine Kontaktfeder sowie bewegliche und feststehende Kontakte aufweist.The invention relates to an electromagnetic relay, which has a magnet system, an armature, a contact spring and movable and fixed contacts.

Bei herkömmlichen Relais ist die Kontaktfeder aus Metallbän- dern ausgestanzt und mit Kunststoff umspritzt. Die beweglichen Kontakte sind auf dem gestanzten Metallband durch Widerstands- oder Laserschweißen befestigt.In conventional relays, the contact spring is punched out of metal strips and overmolded with plastic. The movable contacts are attached to the stamped metal strip by resistance or laser welding.

Die herkömmlichen Relais haben den Nachteil, daß das Stanzen von Metallband hohe Werkzeugkosten verursacht. Die Verwendung von Metallband bedingt eine geringe Flexibilität hinsichtlich der Federkennwerte. Wegen der aufwendigen Stanzwerkzeuge ist man zudem in der Formgestaltung der Federn stark eingeschränkt. Darüber hinaus verziehen sich die Metallbänder wäh- rend des Stanzens; ein Problem, das um so schwerer wiegt, je dünner die verwendeten Bänder in immer weiter miniaturisierten Relais werden. Der nachfolgende Schweißprozeß führt zudem zu einer weiteren Deformation der Federn. Daraus resultiert eine große Streubreite in den Abmessungen der Relaisfedern, was eine hohe Ausfallwahrscheinlichkeit der Relais zur Folge hat und mithin zu einem hohen Ausschuß in der Fertigung führt. Nach dem Zusammenbau der Relais werden diese z. B. durch Reflow-Löten montiert. Gewöhnlich beim Umspritzen verwendete thermoplastische Kunststoffe weisen eine unzureichen- de thermische Stabilität gegenüber den beim Reflow-Löten auftretenden Temperaturen auf. Zur Verbesserung der thermischen Belastbarkeit kommen daher auch hochwärmebeständige Kunststoffe zum Einsatz, die extrem teuer sind.The conventional relays have the disadvantage that punching metal strips causes high tool costs. The use of metal tape requires little flexibility with regard to the spring characteristics. Because of the complex punching tools, the shape of the springs is also very limited. In addition, the metal strips warp during punching; a problem that is all the more serious the thinner the tapes used in increasingly miniaturized relays. The subsequent welding process also leads to a further deformation of the springs. This results in a large spread in the dimensions of the relay springs, which results in a high probability of failure of the relays and thus leads to a high scrap in production. After assembling the relays, these are z. B. assembled by reflow soldering. Thermoplastic materials commonly used in overmolding have insufficient thermal stability compared to the temperatures that occur during reflow soldering. To improve the thermal load capacity, highly heat-resistant plastics are therefore used, which are extremely expensive.

Ziel der vorliegenden Erfindung ist es daher, ein Relais bereitzustellen, bei dem die Kontaktfeder unter Vermeidung hoher Werkzeug- und Fertigungskosten bei gleichzeitig vermin- derter Streubreite in den Federabmessungen hergestellt sind. Zudem wird eine erhöhte Wärmebelastbarkeit der Federn angestrebt.The aim of the present invention is therefore to provide a relay in which the contact spring while avoiding high tooling and manufacturing costs and at the same time minimizing of the spread in the spring dimensions. In addition, an increased heat resistance of the springs is sought.

Dieses Ziel wird erfindungsgemäß durch ein Relais nach Anspruch 1 erreicht. Vorteilhafte Ausgestaltungen der Erfindung sind den weiteren Ansprüchen zu entnehmen.This goal is achieved according to the invention by a relay according to claim 1. Advantageous embodiments of the invention can be found in the further claims.

Die Erfindung besteht in einem elektromagnetischen Relais, das eine Spule, einen die Spule durchsetzenden Kern und einen langgestreckten Anker, der mit dem Kern mindestens einen Ar- beitsluftspalt bildet, aufweist. Ferner weist das Relais mindestens eine bandförmige Kontaktfeder auf, die auf dem Anker aufliegt und mit diesem verbunden ist. Die Kontaktfeder weist mindestens einen beweglichen Federarm auf, der einen beweglichen Kontakt trägt. Ferner weist das Relais mindestens einen Festkontakt auf, der mit dem beweglichen Kontakt zusammenwirkt und auf einem isolierenden Träger befestigt ist. Die Kontaktfeder zeichnet sich dadurch aus, daß sie von einer flexiblen Leiterplatte aus Isolierstoff gebildet wird.The invention consists in an electromagnetic relay which has a coil, a core passing through the coil and an elongated armature which forms at least one working air gap with the core. Furthermore, the relay has at least one band-shaped contact spring which rests on the armature and is connected to it. The contact spring has at least one movable spring arm which carries a movable contact. Furthermore, the relay has at least one fixed contact which interacts with the movable contact and is fastened on an insulating support. The contact spring is characterized in that it is formed by a flexible printed circuit board made of insulating material.

Durch die erfindungsgemäße Bildung der Kontaktfeder aus einer flexiblen Leiterplatte kann das Relais durch Nutzung von Standardtechnologien und -Werkstoffen der Leiterplattenferti- gung ohne teuere Spezial-Stanzwerkzeuge hergestellt werden. Durch das Vermeiden von Metallstanzen wird eine höhere Formtreue der Federn erreicht.By forming the contact spring according to the invention from a flexible printed circuit board, the relay can be manufactured by using standard technologies and materials of printed circuit board manufacture without expensive special stamping tools. Avoiding metal punches ensures that the springs retain their shape more accurately.

Besonders vorteilhafterweise verwendet man Leiterplatten, die verstärkte duroplastische Kunststoffe, die bis zu Temperaturen oberhalb 200 °C formstabil sind, umfassen. Dadurch ist es problemlos möglich, die thermische Stabilität gegen die beim Reflow-Löten auftretenden Temperaturen von etwa 200 °C oder darüber zu erreichen.Printed circuit boards which comprise reinforced thermosetting plastics which are dimensionally stable up to temperatures above 200 ° C. are used particularly advantageously. This makes it easy to achieve thermal stability against the temperatures of around 200 ° C. or higher that occur during reflow soldering.

Darüber hinaus besteht eine vorteilhafte Ausgestaltung der Erfindung darin, daß die beweglichen Kontakte als selektiv mit Kontaktmateπal beschichtete Leiterplattenflachen ausgebildet sind. Eine solche selektive Beschichtung der Leiterplatte kann beispielsweise durch Galvanisieren erfolgen. Durch den Verzicht auf das Aufschweißen der Kontakte auf die Kontaktfedern können diese sich nicht so leicht verziehen, was die Streubreite m den Federabmessungen stark vermindert.In addition, an advantageous embodiment of the invention is that the movable contacts as selective PCB surfaces coated with contact material are formed. Such selective coating of the printed circuit board can be done, for example, by electroplating. Because the contacts are not welded onto the contact springs, they cannot warp so easily, which greatly reduces the spread in the spring dimensions.

Je nach geforderter Lebensdauer oder zu schaltender Last können die beweglichen Kontakte als m die Kontaktfeder emge- preßte oder eingenietete Massivkontakte ausgebildet werden. Ebenfalls ist es möglich, die beweglichen Kontakte mit Leitkleber oder Lot an der Kontaktfeder zu befestigen. In beiden Fallen kann insbesondere auf Schweißen verzichtet werden.Depending on the required service life or the load to be switched, the movable contacts can be designed as solid contacts that are pressed or riveted into the contact spring. It is also possible to attach the movable contacts to the contact spring using conductive adhesive or solder. In both cases, welding can be omitted in particular.

Beim erfmdungsgemaßen Relais können vorteilhafterweise je nach Verfügbarkeit und benotigten Federkennwerten ein- oder mehrlagige flexible Leiterplatten eingesetzt werden.In the relay according to the invention, one-layer or multi-layer flexible printed circuit boards can advantageously be used, depending on the availability and required spring characteristics.

Weiterhin ist eine Ausfuhrungsform besonders vorteilhaft, bei der der Anker als Wippanker ausgebildet ist und bei der die den Anker tragende Ankerfeder und die Kontaktfeder emstuckig aus einer Feder gebildet sind, die auf einer auf dem Sockelelement befestigten Auflage aufliegt. Die Abstände zwischen beweglichen und festen Kontakten sowie der Kontaktuberhub können somit auf einfache Weise durch die Dicke der Auflage eingestellt werden.Furthermore, an embodiment is particularly advantageous in which the armature is designed as a rocker armature and in which the armature spring carrying the armature and the contact spring are formed in one piece from a spring which rests on a support fastened to the base element. The distances between movable and fixed contacts and the contact lift can thus be easily adjusted by the thickness of the support.

Auf besonders einfache und damit vorteilhafte Weise kann man die Federsteifigkeit der Ankerfeder durch Hinterlegen der flexiblen Leiterplatte mit Federstreifen anpassen. Durch die Verwendung von fertig vorgeformten Federhalbzeugen m Bandform für die Verstärkung der Leiterplatte kann auf teuere Spezial-Stanzwerkzeuge verzichtet werden.The spring stiffness of the armature spring can be adjusted in a particularly simple and thus advantageous manner by depositing the flexible printed circuit board with spring strips. The use of preformed spring semi-finished products in the form of a strip for reinforcing the printed circuit board means that expensive special stamping tools can be dispensed with.

Besonders vorteilhafterweise wird die Verbindung zwischenThe connection between

Kontaktfeder und Anker durch einfaches Kleben hergestellt, da wegen der isolierenden Eigenschaften der flexiblen Leiter- platten keine zusätzliche elektrische Isolation notwendig ist .Contact spring and armature made by simple gluing, because of the insulating properties of the flexible conductor no additional electrical insulation is necessary.

Im folgenden wird die Erfindung anhand von Ausführungsbei- spielen und den dazugehörigen Figuren näher erläutert.The invention is explained in more detail below with the aid of exemplary embodiments and the associated figures.

Figur 1 zeigt ein erfindungsgemäßes Relais mit Wippanker im schematischen Querschnitt.Figure 1 shows an inventive relay with rocker armature in schematic cross section.

Figur 2 zeigt beispielhaft eine Gestaltung der Kontaktfeder aus Figur 1.FIG. 2 shows an example of a design of the contact spring from FIG. 1.

Figur 3 zeigt den geschlossenen Kontakt aus Figur 1 entlang der Linie III - III im schematischen Querschnitt.FIG. 3 shows the closed contact from FIG. 1 along the line III-III in a schematic cross section.

Figur 1 zeigt ein erfindungsgemäßes Relais mit Wippanker. Es besteht aus einer Spule 1, die um einen Spulenkörper 17 gewickelt ist. Der Spulenkörper 17 ist von einem Kern 2 durchsetzt. Zwischen den Jochschenkeln des Kerns 2 ist ein Drei- pol-Permanentmagnet 3 angeordnet. Das Magnetsystem ist mit einer Relaisumhüllung 15 umspritzt. Ferner weist das Relais einen langgestreckten Anker 4 auf, an dessen Unterseite eine die Kontaktfeder bildende flexible Leiterplatte 6 befestigt ist. An der flexiblen Leiterplatte 6 sind die beweglichen Kontakte 5 angeordnet. Diese können beispielsweise galvanisch auf Leiterbahnen 7 der Leiterplatte 6 aufgebracht werden. Die flexible Leiterplatte 6 besitzt transversal nach außen ragende Arme 11 (Figur 2), die auf Auflagen 13 aufliegen und so die Funktion von Torsionsfedern ausüben, die längs der Schwenkachse des Ankers 4 verlaufen. Zur Anpassung der Federhärte sind die Arme mit einem metallischen Federstreifen 16 hinterlegt. Die beweglichen Kontakte 5 wirken mit Festkontakten 9 zusammen, welche auf dem Träger 8 befestigt sind. Der Träger 8 wird in dem gezeigten Beispiel als durchkontaktierte starre Leiterplatte ausgeführt. Auf der Außenseite des Trägers sind Lotkugeln 14 angeordnet, die als Anschlußelemente für die Festkontakte 9 bzw. für die Kontaktfeder 6 fungieren. Sie sind mit Hilfe von Durchkontaktierungen 9b über Leiterbahnen 9a auf der Oberseite der starren Leiterplatte bzw. direkt mit den Festkontakten 9 verbunden. Die Relaisumhüllung 15 ist beispielsweise durch Kleben auf dem Träger 8 befe- stigt.Figure 1 shows an inventive relay with rocker armature. It consists of a coil 1 which is wound around a coil former 17. A core 2 passes through the coil former 17. A three-pole permanent magnet 3 is arranged between the yoke legs of the core 2. The magnet system is overmolded with a relay sheath 15. Furthermore, the relay has an elongated armature 4, on the underside of which a flexible circuit board 6 forming the contact spring is fastened. The movable contacts 5 are arranged on the flexible printed circuit board 6. These can, for example, be applied galvanically to conductor tracks 7 of the printed circuit board 6. The flexible circuit board 6 has transversely outwardly projecting arms 11 (FIG. 2) which rest on supports 13 and thus perform the function of torsion springs which run along the pivot axis of the armature 4. To adjust the spring hardness, the arms are backed with a metal spring strip 16. The movable contacts 5 cooperate with fixed contacts 9 which are fastened on the carrier 8. In the example shown, the carrier 8 is designed as a plated-through rigid printed circuit board. Solder balls 14 are arranged on the outside of the carrier and act as connection elements for the fixed contacts 9 and for the contact spring 6. They are connected by means of plated-through holes 9b via conductor tracks 9a on the upper side of the rigid printed circuit board or directly to the fixed contacts 9. The relay casing 15 is fastened, for example, by gluing to the carrier 8.

Figur 2 zeigt die Gestaltung der Kontaktfeder aus Figur 1. Die flexible Leiterplatte 6 weist einen mit dem Anker 4 verbundenen Abschnitt 18 auf, auf dessen Rückseite der Anker 4 aufgeklebt ist. Sie weist ferner bewegliche Federarme 12 auf, auf denen die auf Leiterbahnen 7 angeordnete bewegliche Kontakte 5 angeordnet sind. Die Leiterbahnen 7 dienen zur Kon- taktierung der beweglichen Kontakte 5. Die Federarme 12 der Leiterplatte 6 sind vom mit dem Anker 4 verbundenen Abschnitt 18 durch entlang eines Randabschnitts des Ankers 4 verlaufende Einschnitte teilweise getrennt. Dadurch können sich die Federarme 12 aus der Ebene des Ankers 4 herausbewegen, wodurch ein Kontaktüberhub zustande kommt. Die flexible Leiterplatte 6 weist ferner zwei transversal nach außen ragende Ar- me 11 auf, die entlang der Schwenkachse 10 des Ankers verlaufen. Diese Arme 11 fungieren als Torsionsfeder und liegen auf der Auflage 13 (Figur 1) auf.FIG. 2 shows the design of the contact spring from FIG. 1. The flexible printed circuit board 6 has a section 18 connected to the armature 4, to the rear of which the armature 4 is glued. It also has movable spring arms 12 on which the movable contacts 5 arranged on conductor tracks 7 are arranged. The conductor tracks 7 are used for contacting the movable contacts 5. The spring arms 12 of the circuit board 6 are partially separated from the section 18 connected to the armature 4 by incisions running along an edge section of the armature 4. As a result, the spring arms 12 can move out of the plane of the armature 4, as a result of which a contact overstroke occurs. The flexible printed circuit board 6 also has two arms 11 which project transversely outwards and run along the pivot axis 10 of the armature. These arms 11 act as a torsion spring and rest on the support 13 (Figure 1).

Figur 3 zeigt den geschlossenen Kontakt aus Figur 1 entlang der Linie A - A im schematischen Querschnitt. Auf dem Träger 8 sind zur Relaisinnenseite hin die Festkontakte 9 und zur Relaisaußenseite hin die Lotkugeln 14, die als Anschlußelemente dienen, angeordnet. In dem Schaltzustand des Relais, bei dem die gezeigten Kontakte geschlossen sind, befindet sich der Anker 4 in einer Position über dem Relaissockel 8, die durch den Anschlag des Ankers 4 am Kern 2 (Figur 1) festgelegt ist. Die Federarme 12 der Kontaktfeder befinden sich in einer Ebene über der Ebene des mit dem Anker 4 verbundenen Abschnitts 16 der Kontaktfeder und bewirken gleichzeitig den Kontakt der beweglichen Kontakte 5 mit den Festkontakten 9. Die federnde Verbindung zwischen den Federarmen 12 und dem Rest der Kontaktfeder stellt sicher, daß eine Kontaktkraft zwischen dem beweglichen Kontakt 5 und dem Festkontakt 9 wirkt.FIG. 3 shows the closed contact from FIG. 1 along the line AA in a schematic cross section. The fixed contacts 9 and the solder balls 14, which serve as connection elements, are arranged on the carrier 8 towards the inside of the relay and towards the outside of the relay. In the switching state of the relay, in which the contacts shown are closed, the armature 4 is in a position above the relay base 8, which is fixed by the armature 4 striking the core 2 (FIG. 1). The spring arms 12 of the contact spring are located in a plane above the level of the section 16 of the contact spring connected to the armature 4 and at the same time bring the movable contacts 5 into contact with the fixed contacts 9. The resilient connection between the spring arms 12 and the rest of the contact spring provides sure a contact force acts between the movable contact 5 and the fixed contact 9.

Die Erfindung beschränkt sich nicht auf die gezeigten Ausfüh- rungsformen sondern wird in ihrer allgemeinsten Form durch Anspruch 1 definiert. The invention is not limited to the embodiments shown, but is defined in its most general form by claim 1.

Claims

Patentansprüche claims 1. Elektromagnetisches Relais mit1. Electromagnetic relay with - einer Spule (1) , - einem die Spule (1) durchsetzenden Kern (2), einem langgestreckten Anker (4), der mit dem Kern (2) mindestens einen Arbeitsluftspalt bildet,- a coil (1), - a core (2) passing through the coil (1), an elongated armature (4) which forms at least one working air gap with the core (2), - mindestens einer bandförmigen Kontaktfeder (6), die auf dem Anker (4) aufliegend mit diesem verbunden ist und mindestens einen beweglichen Federarm (12) aufweist, der seinerseits einen beweglichen Kontakt (5) trägt,at least one band-shaped contact spring (6) which is connected to the armature (4) and is connected to the armature (4) and has at least one movable spring arm (12) which in turn carries a movable contact (5), - mindestens einem auf einem isolierenden Träger (8) befestigten, mit dem beweglichen Kontakt (5) zusammenwirkenden Festkontakt (9), dadurch gekennzeichnet, daß die Kontaktfeder (6) von einer flexiblen Leiterplatte aus Isolierstoff gebildet wird.- At least one fixed contact (9) fastened on an insulating support (8) and interacting with the movable contact (5), characterized in that the contact spring (6) is formed by a flexible printed circuit board made of insulating material. 2. Relais nach Anspruch 1, dadurch gekennzeichnet, daß die flexible Leiterplatte (6) verstärkte duroplastische Kunststoffe, die bis Temperaturen oberhalb 200 °C formstabil sind, umfaßt.2. Relay according to claim 1, characterized in that the flexible printed circuit board (6) comprises reinforced thermosetting plastics which are dimensionally stable up to temperatures above 200 ° C. 3. Relais nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die beweglichen Kontakte (5) als selektiv mit Kontaktmaterial beschichtete Leiterplattenflächen ausgebildet sind.3. Relay according to claim 1 or 2, characterized in that the movable contacts (5) are designed as selectively coated with contact material printed circuit board surfaces. Relais nach Anspruch 1 bis 3 , d a d u r c h g e k e n n z e i c h n e t , daß die flexible Leiterplatte ( 6 ) mehrlagig ist . Relay according to Claims 1 to 3, characterized in that the flexible printed circuit board (6) is multi-layered. 5. Relais nach Anspruch 1 bis 4, dadurch gekennzeichnet , daß die Verbindung zwischen der Kontaktfeder (6) und dem Anker (4) durch Kleben hergestellt ist.5. Relay according to claim 1 to 4, characterized in that the connection between the contact spring (6) and the armature (4) is made by gluing. 6. Relais nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß der bewegliche Federarm (12) der Kontaktfeder von dem mit dem Anker (4) verbundenen Abschnitt (16) der Kontakt- feder (6) durch einen entlang eines Randabschnitts des Ankers verlaufenden Einschnitt teilweise getrennt ist.6. Relay according to claim 1 to 5, characterized in that the movable spring arm (12) of the contact spring from the section (16) connected to the armature (4) of the contact spring (6) through an incision extending along an edge section of the armature is partially separated. 7. Relais nach Anspruch 1 bis 6, dadurch gekennzeichnet , daß der Anker (4) um eine Querachse (10) schwenkbar ist und daß die Kontaktfeder (6) im Bereich der Querachse transversal nach außen ragende Arme (11) aufweist, die auf auf dem Träger (8) befestigten Abstandhaltern (13) aufliegen.7. Relay according to claim 1 to 6, characterized in that the armature (4) about a transverse axis (10) is pivotable and that the contact spring (6) in the region of the transverse axis has transversely projecting arms (11) on the spacers (13) attached to the carrier (8) rest. Relais nach Anspruch 7, dadurch gekennzeichnet , daß die Kontaktfeder (6) im Bereich der Arme (11) mit metallischen Federstreifen (16) hinterlegt ist. Relay according to Claim 7, characterized in that the contact spring (6) is backed with metallic spring strips (16) in the region of the arms (11).
PCT/DE1999/002322 1998-07-30 1999-07-29 Electromagnetic relay Ceased WO2000007204A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19834460.0 1998-07-30
DE19834460 1998-07-30
DE19913903.2 1999-03-26
DE1999113903 DE19913903C1 (en) 1999-03-26 1999-03-26 Electromagnetic relay has a printed circuit board base that has formed contacts that are engaged by those of the movable contact carrier

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WO2000007204A2 true WO2000007204A2 (en) 2000-02-10
WO2000007204A3 WO2000007204A3 (en) 2000-08-31

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PCT/DE1999/002322 Ceased WO2000007204A2 (en) 1998-07-30 1999-07-29 Electromagnetic relay

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CN108987190A (en) * 2018-07-11 2018-12-11 贵州航天电器股份有限公司 Magnetic latching relay is pressed in a kind of double breaking points
CN112103138A (en) * 2020-09-14 2020-12-18 苏州磁明科技有限公司 Radio frequency switch with flexible printed circuit contact strip and manufacturing method thereof

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Publication number Priority date Publication date Assignee Title
CN108987190A (en) * 2018-07-11 2018-12-11 贵州航天电器股份有限公司 Magnetic latching relay is pressed in a kind of double breaking points
CN112103138A (en) * 2020-09-14 2020-12-18 苏州磁明科技有限公司 Radio frequency switch with flexible printed circuit contact strip and manufacturing method thereof

Also Published As

Publication number Publication date
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WO2000007204A3 (en) 2000-08-31
WO2000007200A2 (en) 2000-02-10

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