EP0226891B1 - Method of manufacturing an electromagnetic relay without adjusting - Google Patents

Method of manufacturing an electromagnetic relay without adjusting Download PDF

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Publication number
EP0226891B1
EP0226891B1 EP86116738A EP86116738A EP0226891B1 EP 0226891 B1 EP0226891 B1 EP 0226891B1 EP 86116738 A EP86116738 A EP 86116738A EP 86116738 A EP86116738 A EP 86116738A EP 0226891 B1 EP0226891 B1 EP 0226891B1
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EP
European Patent Office
Prior art keywords
contact tongue
pole plates
adhesive
base body
relay
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP86116738A
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German (de)
French (fr)
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EP0226891A1 (en
Inventor
Rolf-Dieter Dipl.-Phys. Kimpel
Josef Schweiger
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Siemens AG
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Siemens AG
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Filing date
Publication date
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Priority to AT86116738T priority Critical patent/ATE57043T1/en
Publication of EP0226891A1 publication Critical patent/EP0226891A1/en
Application granted granted Critical
Publication of EP0226891B1 publication Critical patent/EP0226891B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H49/00Apparatus or processes specially adapted to the manufacture of relays or parts thereof
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/4902Electromagnet, transformer or inductor
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49002Electrical device making
    • Y10T29/49105Switch making

Definitions

  • the invention relates to a method for the adjustment-free manufacture of an electromagnetic relay with a base body and with a longitudinally inserted through a cavity of the base body anchor or contact tongue, the fastening end of which is glued into the grooves of the base body by means of laterally formed fastening tabs, the free end of the Anchor or contact tongue is aligned between two pole plates during the solidification of the adhesive.
  • the object of the present invention is to improve the method of the type mentioned at the outset in such a way that an even more precise alignment of the contact tongue during manufacture is made possible with simple and easy-to-control means.
  • this object is achieved in that, during the solidification of the adhesive, the contact tongue is periodically switched over by means of an alternating magnetic field generated between it and the two pole plates until the adhesive has solidified.
  • the alternating excitation can already be applied during the assembly of the contact tongue.
  • the contact tongue is drawn exactly into the narrow air gap between the two pole plates and aligned between them, so that the risk of mutual damage between the pole plates and the contact tongue is avoided.
  • the alternating magnetic field can be generated, for example, by coupling the two pole plates to poles of the same name in a permanent magnet arrangement and by periodically switching the contact tongue by means of a coil excited with alternating current of a predetermined frequency.
  • the permanent magnet arrangement can be formed from one or more permanent magnets, which are coupled directly or via ferromagnetic yokes to the two pole plates.
  • the relay to which the invention is applied is a polarized system.
  • the relay's own magnet system can be used for adjustment, namely a permanent magnet arrangement lying against the pole plates and the excitation winding of the relay applied to the base body.
  • an external permanent magnet in combination with the relay coil instead of the relay permanent magnet arrangement to be assembled later, or to connect an external excitation coil for production adjustment with an external permanent magnet arrangement.
  • the excitation current can be generated, for example, with a rectangular alternating voltage applied to the relay's own or the externally coupled coil.
  • the frequency can preferably be 50 Hz, since this frequency can be derived most easily from the mains voltage.
  • the mechanical properties of the relay in particular the contact tongue and the curing speed of the adhesive, determining the upper and lower limits for the frequency to be selected.
  • the duty cycle of the AC voltage is preferably chosen symmetrically, at least when the relay is to have a bistable switching characteristic.
  • Fig. 1 shows - partly in section - schematically a relay, as it is shown and described in more detail in DE-OS 33 38 198.
  • This relay has a coil former 1 with a winding 2 and a longitudinal opening in the axial direction through the coil former 3, in which is arranged a contact tongue or anchor spring 4 extending in the axial direction.
  • the contact tongue 4 has, at its fastening end 4a, laterally formed fastening tabs, by means of which it is mounted in grooves 1a and fastened by introducing quick-curing adhesive.
  • the exact design of the contact tongue and the coil body in this area is shown in the aforementioned DE-OS 33 38 198.
  • the contact tongue is between see two pole plates 5 and 6 switchable, these two pole plates are polarized in the finished relay by a permanent magnet arrangement placed on the front. Depending on the direction of the excitation current in the winding 2, the contact tongue is brought into contact with the pole plate 5 or the pole plate 6 and held there by the permanent magnetic force.
  • the end of the contact tongue 4b should be positioned as precisely as possible in the middle between the two pole plates 5 and 6 - without being influenced by the permanent magnet arrangement.
  • the contact tongue with its lateral contact surfaces should be aligned as parallel as possible to the pole surfaces 5a and 6a of the two pole plates in order to actually maintain the intended contact distances at all points.
  • this positioning is achieved in that, during the curing of the adhesive, the contact tongue 4 is periodically switched between the two pole plates at a predetermined frequency of, for example, 50 Hz.
  • the aforementioned periodic switching can be carried out according to FIG. 1 with a simple arrangement.
  • a permanent magnet 7 is coupled to the two pole plates 5 and 6 via two yokes 8 and 9.
  • a voltage U for example a square-wave alternating voltage of 50 Hz
  • the permanent magnet arrangement 7, 8, 9 can be removed, and it is shown that the contact tongue 4 is aligned very precisely between the pole plates 5 and 6 and very well parallel to the pole faces 5a and 6a. In this way, optimal double contacting of the relay is guaranteed.
  • the relay's own magnet can also be used if this is cheaper in the production process.
  • an externally coupled winding can be used, which is pushed over the two yokes 8 and 9, for example.
  • Such an external winding can, however, also be provided with its own core and coupled to the two yokes 8 and 9 with a pole face of this core on the end side.
  • the adjustment described can also be carried out without using a permanent magnet arrangement.
  • a case is shown schematically in FIG. 2.
  • the relay with the coil former 1 and the pole plates 5 and 6 is again shown.
  • Two yokes 18 and 19, each carrying a coil 20 and 21, are coupled to these two pole plates.
  • An excitation alternating voltage U corresponding to FIG. 1 is applied via two diodes 22 and 23 between the winding starts 20a and 21a and winding ends 20b and 21b in such a way that one of the coils 20 and 21 is alternately excited and then in each case via the associated one Yoke 18 or 19 couples a magnetic flux to the associated pole plates 5 or 6.
  • the contact tongue is switched over periodically and aligned between the two pole plates 5 and 6 until the adhesive has hardened.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electromagnets (AREA)
  • Breakers (AREA)
  • Burglar Alarm Systems (AREA)
  • Radio Relay Systems (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Abstract

An electromagnetic relay having a contact tongue arranged extending within a base body and switchable between two pole plates, the contact tongue having an end secured by a hard fastening adhesive, the adjustment of the contact tongue between the pole plates occurs by periodically switching an alternating excitation current during solidification of the adhesive.

Description

Die Erfindung betrifft ein Verfahren zur justierfreien Herstellung eines elektromagnetischen Relais mit einem Grundkörper sowie mit einer der Länge nach durch einen Hohlraum des Grundkörpers gesteckten Anker- bzw. Kontaktzunge, deren Befestigungsende mittels seitlich angeformter Befestigungslappen in Nuten des Grundkörpers verklebt wird, wobei das freie Ende der Anker- bzw. Kontaktzunge während des Erstarrens des Klebstoffs zwischen zwei Polblechen ausgerichtet wird.The invention relates to a method for the adjustment-free manufacture of an electromagnetic relay with a base body and with a longitudinally inserted through a cavity of the base body anchor or contact tongue, the fastening end of which is glued into the grooves of the base body by means of laterally formed fastening tabs, the free end of the Anchor or contact tongue is aligned between two pole plates during the solidification of the adhesive.

Ein derartiges Verfahren ist in der DE-OS 33 38 198 beschrieben. Die Ausrichtung der Kontaktzunge zwischen den beiden Polblechen erfolgt dort beispielsweise mittels eines im Grundkörper erzeugten Luftstroms, wobei allerdings die Gefahr besteht, daß der dünnflüssige Klebstoff durch diesen Luftstrom beeinträchtigt wird und unter Umständen in einer nicht erwünschten Weise verteilt wird. Eine Ausrichtung der Kontaktzunge mit mechanischen Mitteln ist bei einer Größenordnung der Kontaktabstände von einem 1/10 mm nur mit großem Aufwand möglich.Such a method is described in DE-OS 33 38 198. The alignment of the contact tongue between the two pole plates is carried out there, for example, by means of an air flow generated in the base body, although there is a risk that the thin liquid adhesive will be adversely affected by this air flow and may be distributed in an undesired manner. Alignment of the contact tongue with mechanical means is only possible with great effort given a size of the contact distances of 1/10 mm.

Aufgabe der vorliegenden Erfindung ist es, das Verfahren der eingangs genannten Art so zu verbessern, daß eine noch genauere Ausrichtung der Kontaktzunge während der Fertigung mit einfachen und leicht zu steuernden Mitteln ermöglicht wird.The object of the present invention is to improve the method of the type mentioned at the outset in such a way that an even more precise alignment of the contact tongue during manufacture is made possible with simple and easy-to-control means.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß während des Erstarrens des Klebstoffs die Kontaktzunge mittels eines zwischen ihr und den beiden Polblechen erzeugten magnetischen Wechselfelds periodisch solange umgeschaltet wird, bis der Klebstoff erstarrt ist.According to the invention, this object is achieved in that, during the solidification of the adhesive, the contact tongue is periodically switched over by means of an alternating magnetic field generated between it and the two pole plates until the adhesive has solidified.

Bei dem erfindungsgemäßen Verfahren wird also nicht versucht, die Kontaktzunge in einer Mittelposition zwischen beiden Polblechen festzuhalten; vielmehr wird diese Kontaktzunge bewußt mit einer vorgegebenen Frequenz ständig umgeschaltet. Es hat sich gezeigt, daß auf diese Weise eine sehr genaue Ausrichtung der Kontaktzunge in der Mitte zwischen beiden Polblechen nach dem Erstarren bzw. Aushärten des Klebstoffes erzielt wird. Da die Kontaktzunge während des Erstarrens des Klebstoffes abwechselnd mit den beiden gegenüberliegenden Polflächen der Polbleche zur Anlage kommt, wird sie sehr gut parallel zu diesen Polflächen ausgerichtet, was bei einem geringen Kontaktabstand, der beispielsweise bei derartigen Relais in der Größenordnung von 1/10 mm liegt, sehr wichtig ist. Diese Ausrichtung kann mit dem erfindungsgemäßen Verfahren auf sehr einfache Weise gewonnen werden, da die hierzu lediglich erforderliche Wechsel-Erregung ohne großen Aufwand bewerkstelligt und gesteuert werden kann.In the method according to the invention, therefore, no attempt is made to hold the contact tongue in a middle position between the two pole plates; rather, this contact tongue is deliberately switched over at a predetermined frequency. It has been shown that in this way a very precise alignment of the contact tongue in the middle between the two pole plates is achieved after the adhesive has solidified or cured. Since the contact tongue alternately comes into contact with the two opposite pole faces of the pole sheets during the solidification of the adhesive, it is aligned very well parallel to these pole faces, which is due to a small contact distance, which for example is of the order of 1/10 mm in such relays , is very important. This alignment can be obtained in a very simple manner with the method according to the invention, since the alternating excitation which is only required for this can be accomplished and controlled with little effort.

In vorteilhafter Weise kann die Wechsel-Erregung bereits bei der Montage der Kontaktzunge angewendet werden. Durch die Zentrierung mit dem Wechselfeld wird die Kontaktzunge genau in den engen Luftspalt zwischen den beiden Polblechen hineingezogen und zwischen diesen ausgerichtet, so daß die Gefahr einer gegenseitigen Beschädigung von Polblechen und Kontaktzunge vermieden wird.In an advantageous manner, the alternating excitation can already be applied during the assembly of the contact tongue. By centering with the alternating field, the contact tongue is drawn exactly into the narrow air gap between the two pole plates and aligned between them, so that the risk of mutual damage between the pole plates and the contact tongue is avoided.

Die Erzeugung des magnetischen Wechselfeldes kann beispielsweise dadurch erfolgen, daß die beiden Polbleche mit ungleichnamigen Polen einer Dauermagnetanordnung gekoppelt werden und daß die Kontaktzunge mittels einer mit Wechselstrom einer vorgegebenen Frequenz erregten Spule periodisch umgeschaltet wird. Die Dauermagnetanordnung kann aus einem oder mehreren Dauermagneten gebildet sein, die unmittelbar oder über ferromagnetische Joche mit den beiden Polblechen gekoppelt werden.The alternating magnetic field can be generated, for example, by coupling the two pole plates to poles of the same name in a permanent magnet arrangement and by periodically switching the contact tongue by means of a coil excited with alternating current of a predetermined frequency. The permanent magnet arrangement can be formed from one or more permanent magnets, which are coupled directly or via ferromagnetic yokes to the two pole plates.

Im allgemeinen handelt es sich bei dem Relais, bei dem die Erfindung zur Anwendung kommt, um ein polarisiertes System. In diesem Falle kann zur Justierung das relaiseigene Magnetsystem verwendet werden, nämlich eine an den Polblechen anliegende Dauermagnetanordnung und die auf den Grundkörper aufgebrachte Erregerwicklung des Relais. Es ist jedoch auch möglich, anstelle der erst später zu montierenden relaiseigenen Dauermagnetanordnung zunächst einen externen Dauermagneten in Kombination mit der Relaisspule zu verwenden oder auch mit einer externen Dauermagnetanordnung auch eine externe Erregerspule zur Fertigungsjustierung anzukoppeln. Der Erregerstrom kann beispielsweise mit einer an die relaiseigene bzw. die extern angekoppelte Spule angelegten RechteckWechselspannung erzeugt werden. Die Frequenz kann vorzugsweise 50 Hz betragen, da diese Frequenz am einfachsten aus der Netzspannung abgeleitet werden kann. Andere Frequenzen können natürlich verwendet werden, wobei die mechanischen Eigenschaften des Relais, insbesondere der Kontaktzunge und die Aushärtegeschwindigkeit des Klebstoffes, die obere und untere Grenze für die zu wählende Frequenz bestimmen. Das Tastverhältnis der Wechselspannung wird vorzugsweise symmetrisch gewählt, zumindest dann, wenn das Relais eine bistabile Schaltcharakteristik erhalten soll.In general, the relay to which the invention is applied is a polarized system. In this case, the relay's own magnet system can be used for adjustment, namely a permanent magnet arrangement lying against the pole plates and the excitation winding of the relay applied to the base body. However, it is also possible to use an external permanent magnet in combination with the relay coil instead of the relay permanent magnet arrangement to be assembled later, or to connect an external excitation coil for production adjustment with an external permanent magnet arrangement. The excitation current can be generated, for example, with a rectangular alternating voltage applied to the relay's own or the externally coupled coil. The frequency can preferably be 50 Hz, since this frequency can be derived most easily from the mains voltage. Other frequencies can of course be used, the mechanical properties of the relay, in particular the contact tongue and the curing speed of the adhesive, determining the upper and lower limits for the frequency to be selected. The duty cycle of the AC voltage is preferably chosen symmetrically, at least when the relay is to have a bistable switching characteristic.

Die Erfindung wird nachfolgend an Ausführungsbeispielen näher erläutert. Es zeigt

  • Fig. 1 eine schematische Darstellung eines Relais mit einer Vorrichtung zur Justierung der Kontaktzunge unter Einbeziehung der relaiseigenen Spule,
  • Fig. 2 eine etwas abgewandelte Justiervorrichtung unter Verwendung einer externen Spulenanordnung.
The invention is explained in more detail below using exemplary embodiments. It shows
  • 1 is a schematic representation of a relay with a device for adjusting the contact tongue including the relay's own coil,
  • Fig. 2 shows a slightly modified adjustment device using an external coil arrangement.

Fig. 1 zeigt - teilweise geschnitten - schematisch ein Relais, wie es genauer in der DE-OS 33 38 198 gezeigt und beschrieben ist Dieses Relais besitzt einen Spulenkörper 1 mit einer Wicklung 2 und einer längs in Axialrichtung durch den Spulenkörper verlaufenden Durchgangsöffnung 3, in welcher eine Kontaktzunge bzw. Ankerfeder 4 in Axialrichtung verlaufend angeordnet ist. Die Kontaktzunge 4 besitzt an ihrem Befestigungsende 4a jeweils seitlich angeformte Befestigungslappen, mittels derer sie in Nuten 1a gelagert und durch Einbringen von schnell aushärtendem Klebstoff befestigt wird. Die genaue Ausbildung der Kontaktzunge und des Spulenkörpers in diesem Bereich ist in der bereits genannten DE-OS 33 38 198 gezeigt.Fig. 1 shows - partly in section - schematically a relay, as it is shown and described in more detail in DE-OS 33 38 198. This relay has a coil former 1 with a winding 2 and a longitudinal opening in the axial direction through the coil former 3, in which is arranged a contact tongue or anchor spring 4 extending in the axial direction. The contact tongue 4 has, at its fastening end 4a, laterally formed fastening tabs, by means of which it is mounted in grooves 1a and fastened by introducing quick-curing adhesive. The exact design of the contact tongue and the coil body in this area is shown in the aforementioned DE-OS 33 38 198.

An ihrem freien Ende 4b ist die Kontaktzunge zwisehen zwei Polblechen 5 und 6 umschaltbar, wobei im fertigen Relais diese beiden Polbleche durch eine stirnseitig aufgesetzte Dauermagnetanordnung polarisiert werden. Je nach der Richtung des Erregerstroms in der Wicklung 2 wird also die Kontaktzunge dabei in Anlage zum Polblech 5 oder zum Polblech 6 gebracht und durch die Dauermagnetkraft dort festgehalten.At its free end 4b, the contact tongue is between see two pole plates 5 and 6 switchable, these two pole plates are polarized in the finished relay by a permanent magnet arrangement placed on the front. Depending on the direction of the excitation current in the winding 2, the contact tongue is brought into contact with the pole plate 5 or the pole plate 6 and held there by the permanent magnetic force.

Um möglichst gleiche Ansprechwerte des Relais für beide Schaltrichtungen zu erhalten, soll die Kontaktzunge mit ihrem Ende 4b möglichst genau in der Mitte zwischen den beiden Polblechen 5 und 6 positioniert werden - ohne Beeinflussung durch die Dauermagnetanordnung. Außerdem soll die Kontaktzunge mit ihren seitlichen Kontaktflächen möglichst parallel zu den Polflächen 5a und 6a der beiden Polbleche ausgerichtet werden, um die vorgesehenen Kontaktabstände tatsächlich auch an allen Stellen einzuhalten. Zu diesem Zweck ist vorgesehen, die Kontaktzunge 4 während des Einbringens und Aushärtens des Klebstoffes in den Nuten 1a so auszurichten, daß die gewünschte Mittelposition ohne nachträgliche Justierung eingenommen wird, da ein späterer Eingriff an der Kontaktzunge nur unter verhältnismäßig großem Aufwand an Vorrichtungen und Justierzeit möglich ist. Gemäß der Erfindung wird diese Positionierung dadurch erreicht, daß während des Aushärtens des Klebstoffes die Kontaktzunge 4 periodisch zwischen den beiden Polblechen mit einer vorgegebenen Frequenz von beispielsweise 50 Hz umgeschaltet wird.In order to obtain the same response values of the relay for both switching directions, the end of the contact tongue 4b should be positioned as precisely as possible in the middle between the two pole plates 5 and 6 - without being influenced by the permanent magnet arrangement. In addition, the contact tongue with its lateral contact surfaces should be aligned as parallel as possible to the pole surfaces 5a and 6a of the two pole plates in order to actually maintain the intended contact distances at all points. For this purpose, it is provided to align the contact tongue 4 during the introduction and curing of the adhesive in the grooves 1a in such a way that the desired central position is adopted without subsequent adjustment, since a later intervention on the contact tongue is only possible with a relatively large amount of devices and adjustment time is. According to the invention, this positioning is achieved in that, during the curing of the adhesive, the contact tongue 4 is periodically switched between the two pole plates at a predetermined frequency of, for example, 50 Hz.

Die erwähnte periodische Umschaltung kann nach Fig. 1 mit einer einfachen Anordnung erfolgen. An die beiden Polbleche 5 und 6 wird ein Dauermagnet 7 über zwei Joche 8 und 9 angekoppelt. Danach wird an die Erregerwicklung 2 über deren Anschlüsse 10 und 11 eine Spannung U, beispielsweise eine Rechteckwechselspannung von 50 Hz, angelegt. Nach dem Erstarren des Klebstoffes kann die Dauermagnetanordnung 7, 8, 9 entfernt werden, und es zeigt sich, daß die Kontaktzunge 4 sehr genau zwischen den Polblechen 5 und 6 und sehr gut parallel zu den Polflächen 5a und 6a ausgerichtet ist. Auf diese Weise wird eine optimale Doppelkontaktgabe des Relais gewährleistet.The aforementioned periodic switching can be carried out according to FIG. 1 with a simple arrangement. A permanent magnet 7 is coupled to the two pole plates 5 and 6 via two yokes 8 and 9. Thereafter, a voltage U, for example a square-wave alternating voltage of 50 Hz, is applied to the excitation winding 2 via its connections 10 and 11. After the adhesive has solidified, the permanent magnet arrangement 7, 8, 9 can be removed, and it is shown that the contact tongue 4 is aligned very precisely between the pole plates 5 and 6 and very well parallel to the pole faces 5a and 6a. In this way, optimal double contacting of the relay is guaranteed.

Die Justiervorrichtung von Fig. 1 kann natürlich abgewandelt werden. Beispielsweise kann anstelle des Dauermagneten 7 mit den Jochen 8 und 9 auch der relaiseigene Magnet verwendet werden, wenn dies im Fertigungsablauf günstiger ist. Andererseits kann anstelle der relaiseigenen Erregerwicklung 2 eine extern angekoppelte Wicklung verwendet werden, die beispielsweise über die beiden Joche 8 und 9 geschoben wird. Eine solche externe Wicklung kann aber auch mit einem eigenen Kern versehen und stimseitig mit einer Polfläche dieses Kerns an die beiden Joche 8 und 9 angekoppelt werden.1 can of course be modified. For example, instead of the permanent magnet 7 with the yokes 8 and 9, the relay's own magnet can also be used if this is cheaper in the production process. On the other hand, instead of the relay excitation winding 2, an externally coupled winding can be used, which is pushed over the two yokes 8 and 9, for example. Such an external winding can, however, also be provided with its own core and coupled to the two yokes 8 and 9 with a pole face of this core on the end side.

Grundsätzlich kann die beschriebene Justierung aber auch ohne Verwendung einer Dauermagnetanordnung vorgenommen werden. Ein solcher Fall ist in Fig. 2 schematisch dargestellt. Gezeigt ist wiederum das Relais mit dem Spulenkörper 1 und den Polblechen 5 und 6. An diese beiden Polbleche werden zwei Joche 18 und 19 angekoppelt, die jeweils eine Spule 20 bzw. 21 tragen. Eine Erregerwechselspannung U entsprechend Fig. 1 wird über zwei Dioden 22 bzw. 23 so zwischen die Wicklungsanfänge 20a bzw. 21 a und Wicklungsenden 20b bzw. 21 b angelegt, daß abwechselnd jeweils eine der Spulen 20 und 21 erregt wird und dann jeweils über das zugehörige Joch 18 bzw. 19 einen magnetischen Fluß an das zugehörige Polbleche 5 bzw. 6 ankoppelt. Auch in diesem Fall wird die Kontaktzunge periodisch umgeschaltet und bis zum Aushärten des Klebstoffes in der Mitte zwischen beiden Polblechen 5 und 6 ausgerichtet.Basically, the adjustment described can also be carried out without using a permanent magnet arrangement. Such a case is shown schematically in FIG. 2. The relay with the coil former 1 and the pole plates 5 and 6 is again shown. Two yokes 18 and 19, each carrying a coil 20 and 21, are coupled to these two pole plates. An excitation alternating voltage U corresponding to FIG. 1 is applied via two diodes 22 and 23 between the winding starts 20a and 21a and winding ends 20b and 21b in such a way that one of the coils 20 and 21 is alternately excited and then in each case via the associated one Yoke 18 or 19 couples a magnetic flux to the associated pole plates 5 or 6. In this case too, the contact tongue is switched over periodically and aligned between the two pole plates 5 and 6 until the adhesive has hardened.

Claims (8)

1. Method for manufacturing an electromagnetic relay without adjustment, comprising a base body and with an armature or contact tongue (4) which is pushed lengthwise through a hollow space in the base body and the securing end of which is bonded by means of laterally formed-on securing tabs in grooves of the base body, the free end of the armature or contact tongue (4) being aligned between two pole plates (5, 6) during the hardening of the adhesive, characterized in that the contact tongue (4) is periodically switched over by means of an alternating magnetic field generated between it and the two pole plates (5, 6) during the hardening of the adhesive until the adhesive has hardened.
2. Method according to Claim 1, characterized in that the two pole plates (5, 6) are coupled to unlike poles of a permanent magnet arrangement (7, 8, 9) and that the contact tongue (4) is periodically switched over by means of a coil (2) excited with alternating current of a predetermined frequency.
3. Method according to Claim 2, characterized in that the own exciter coil (2) of the relay is connected to an alternating voltage for the periodic switching-over of the contact tongue (4).
4. Method according to Claim 2, characterized in that the field of a coil externally connected to the pole shoes is superimposed on the permanent-magnet field.
5. Method according to Claim 1, characterized in that a magnetic flux is alternately coupled to the two pole shoes (5, 6) via an electromagnetic arrangement (20, 21).
6. Method according to one of Claims 1 to 5, characterized in that an alternating current having a frequency of about 50 Hz is used for switching-over the contact tongue.
7. Method according to one of Claims 1 to 6, characterized in that an alternating current having a symmetrical duty ratio is used for switching-over.
8. Method according to one of Claims 1 to 7, characterized in that the alternating magnetic field is already applied during the assembly of the contact tongue in the base body.
EP86116738A 1985-12-05 1986-12-02 Method of manufacturing an electromagnetic relay without adjusting Expired - Lifetime EP0226891B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86116738T ATE57043T1 (en) 1985-12-05 1986-12-02 PROCESS FOR ADJUSTMENT-FREE MANUFACTURING OF AN ELECTROMAGNETIC RELAY.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3543099 1985-12-05
DE3543099 1985-12-05

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EP0226891A1 EP0226891A1 (en) 1987-07-01
EP0226891B1 true EP0226891B1 (en) 1990-09-26

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US (1) US4742610A (en)
EP (1) EP0226891B1 (en)
JP (1) JPH0711934B2 (en)
AT (1) ATE57043T1 (en)
DE (1) DE3674554D1 (en)
ES (1) ES2017621B3 (en)

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Publication number Publication date
DE3674554D1 (en) 1990-10-31
US4742610A (en) 1988-05-10
ATE57043T1 (en) 1990-10-15
EP0226891A1 (en) 1987-07-01
JPH0711934B2 (en) 1995-02-08
ES2017621B3 (en) 1991-03-01
JPS62139226A (en) 1987-06-22

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