DE2119734C3

DE2119734C3 - Electromagnetic relay

Info

Publication number: DE2119734C3
Application number: DE19712119734
Authority: DE
Inventors: Hans 7128 Lauffen Pfenning
Original assignee: Bach & Co 7100 Heilbronn
Current assignee: Bach & Co 7100 Heilbronn
Filing date: 1971-04-22
Publication date: 1978-01-12

Description

stet Darüber hinaus wird durch diese Anordnung eine besonders gedrängte Bauweise des Relais ermöglichtIn addition, this arrangement enables a particularly compact design of the relay

Es ist an sich bekannt, die Kontaktfedern von Kontaktfedersätzen eines Relais in schräg zur Grundfläche des zugehörigen Isolierstoffblockes liegenden Schlitzen zu lagern und an ihren freien Enden derart abzustützen, daß die gewünschte Vorspannung erreicht wird (OE-PS 2 24 708). Bei diesem bekannten Relais sind die unbeweglichen Kontaktfedern an ihren freien Enden ebenfalls fest eingespannt, so daß der Kontaktdruck von den beweglichen Federn hergestellt wird, wobei zusätzlich zum Vorspannen der beweglichen Kontaktfedern eine an dem Betätigungsglied angreifende Feder erforderlich ist, die durch mittige Abbiegung vorgespannt ist. Auch diese Anordnung ermöglicht keine genügende Genauigkeit des Kontaktdruckes, und eine Spannungsfestigkeit zwischen den benachbarten Kontaktsätzen ist auch mangels einer Isolierung zwischen den Kontakten nicht gegeben.It is known per se, the contact springs of Contact spring sets of a relay located at an angle to the base of the associated insulating block To store slots and to support at their free ends in such a way that the desired preload is achieved (OE-PS 2 24 708). In this known relay, the immovable contact springs are at their free ends also firmly clamped so that the contact pressure of the movable springs is produced, in addition to biasing the movable contact springs a spring acting on the actuating member is required, which is pretensioned by a central bending is. This arrangement also does not allow sufficient accuracy of the contact pressure, and one Dielectric strength between the adjacent sets of contacts is also due to the lack of insulation between not given to the contacts.

Eine Ausführungsform des erfindungsgemäßen elektromagnetischen Relais wird im folgenden anhand der zeichnungen näher erläutert Es zeigtAn embodiment of the electromagnetic according to the invention Relay is explained in more detail below with reference to the drawings. It shows

F i g. 1 das Relais in etwa dreifach vergrößerter Darstellung in Seitenansicht,F i g. 1 the relay in a side view, enlarged approximately three times,

Fig.2 den Kontaktfedersatz des Relais in Ansicht von oben,Fig. 2 the contact spring set of the relay in view from above,

F i g. 3 den Isolierstoffblock des Kontaktfedersatzes in stirnseitiger Ansicht nach Pfeil III in Fig. 1, jedoch ohne Kontaktfedern.F i g. 3 the insulating material block of the contact spring set in a front view according to arrow III in FIG. 1, however without contact springs.

Das dargestellte Kleinrelais trägt auf einem aus Kunststoff gepreßten Wickelkörper 10 eine Feincraht-Wicklung 11 und hat einen die Wicklung durchsetzenden Eisenkern 12, welcher an einem Wicklungsende über den Wicklungskörper vorsteht und an seinem anderen Ende mit einem ebenfalls zum Eisenkern gehörigen Eisenwinkel 13 vernietet ist. Der längere Schenkel 14 dieses Eisenwinkels ist an seinem Endabschnitt als Schneidenlager 15 für einen beweglichen Klappanker 16 ausgebildet, der auf der Kante des Schenkels 14 mit einem Halteblech 17 gesichert ist.The small relay shown carries a fine wire winding on a winding body 10 pressed from plastic 11 and has an iron core 12 which penetrates the winding and which is at one end of the winding protrudes over the winding body and at its other end with one also to the iron core Corresponding iron angle 13 is riveted. The longer leg 14 of this iron angle is on his End section designed as a blade bearing 15 for a movable hinged armature 16, which is on the edge of the Leg 14 is secured with a retaining plate 17.

Auf dem Schenkel 14 des Eisenwinkels 13 ist mit einer durchgehenden Halteschraube 18 ein Kontaktfedersatz 20 befestigt, der eine geschlossene Baugruppe bildet und symmetrisch zu einer in der Achse der Wicklung 11 und des Eisenkerns 12 liegenden Ebene A-A ausgebildet ist. Zu beiden Seiten dieser Symmetrieebene befindet sich je einer von zwei Kontaktsätzen B und C, von denen jeder aus einer mittleren, über ein als Isolierstoffpimpel ausgebildetes Betätigungsglied mit dem Klappanker 16 gekuppelten Kontaktfeder 22 und zwei im wesentlichen unbeweglichen Gegenkontaktfedern besteht, nämlich einer inneren Kontaktfeder 24 und einer äußeren Kontaktfeder 25. In F i g. 1 sind von diesen Kontaktfedern lediglich diejenigen erkennbar, welche zu dem Kontaktfedersatz B gehören. Der Kontaktfedersatz C ist in gleicher Weise aufgebaut.A contact spring set 20 is attached to the leg 14 of the iron bracket 13 with a continuous retaining screw 18, which forms a closed assembly and is symmetrical to a plane AA lying in the axis of the winding 11 and the iron core 12. On both sides of this plane of symmetry there is one of two contact sets B and C, each of which consists of a central contact spring 22 coupled to the hinged armature 16 via an actuating element designed as an insulating material and two essentially immovable counter-contact springs, namely an inner contact spring 24 and an outer contact spring 25. In FIG. 1, only those of these contact springs can be seen which belong to the contact spring set B. The contact spring set C is constructed in the same way.

Zum Einspannen der Kontaktfedern ist ein Isolierstoffblock vorgesehen, der aus einem Endstück 26 und einer an dem Endstück angeformten Trennwand 27 besteht, welche senkrecht auf dem Schenkel 14 des FJsenwinkels 13 steht und die beiden Kontaktsätze B und C gegen mechanische Beschädigungen schützt und elektrisch gegen Spannungsüberschläge und dergleichen sichert Zur Aufnahme der Kontaktfedern enthält, das Endstück 26 des Isolierstoffblocks jeweils in einer gemeinsamen Ebene zwei Einschnitte, die von zwei einander gegenüberliegenden Diockseiten 28 und 29 aus bis jeweils in die Nähe des anderen Einschnittes unter Belassung eines den Zusammenhalt des Blockes sichernden Mittelstückes reichen, in dessen Verlängerung die Trennwand 27 angeordnet ist Wie F i g. 3 zeigt sind für den Kontaktfedersatz fidrei Einschnitte 31,32 und 33 und für den Kontaktfedersau C drei Einschnitte 34, 35 und 36 vorgesehen. Der zur Aufnahme der äußeren Gegenkontaktfeder 25 bestimmte Einschnitt 31 ist gegen die mit zwei Einsteckzapfen 37 und 38 versehene Grundfläche 40 des Isolierstoffblocks derart geneigt, daß die Kontaktfeder 25 beim Einsetzen in diesen Einschnitt unter gleichzeitigem Auflagern auf einem Stützarm 41 die notwendige Vorspannung erhält, die zur sicheren Kontaktgabe mit dem Gegenkontakt der Kontaktfeder 22 erforderlich ist; diese mittlere Kontaktfeder wird beim Einschalten des Relais mittels des Pimpels 21 vom Klappanker 16 in Richtung auf die Kontaktfeder 25 bewegt Diese äußere Kontaktfeder liegt mit der durch die Neigung des Schlitzes 31 erzwungenen Vorspannung auf dem Stützarm 41 auf und wird dadurch in der für die Kontaktgabe richtigen Stellung genau fixiert. In analoger Weise ist der zur Aufnahme der inneren Gegenkontaktfeder 24 bestimmte Einschnitt 33 nach oben ansteigend ausgebildet und einem zweiten Stützarm 42 zugeordnet, an welchem die Kontaktfeder 24 von unten unter Vorspannung zur Anlage kommt, wenn die mittlere Kontaktfeder 22 mit ihrem Kontaktstück 43 abzuheben beginnt Der Stützarm 42 bestimmt genau diejenige Lage der mittleren Kontaktfeder 22, bei welcher die Verbindung zum Kontaktstück 44 der Kontaktfeder 24 gelöst wird. Die Neigung des für die mittlere Kontaktfeder 22 bestimmten Einschnittes 32 ist leicht nach unten gerichtet, wodurch in Verbindung mit dem Pimpel 21 der in der Ruhestellung des Relais notwendige Kontaktdruck zwischen d?n Kontaktstücken 43 und 44 erzeugt wird.To clamp the contact springs, an insulating material block is provided, which consists of an end piece 26 and a partition wall 27 formed on the end piece, which is perpendicular to the leg 14 of the flange 13 and protects the two sets of contacts B and C against mechanical damage and electrically against voltage flashovers and the like secures To accommodate the contact springs, the end piece 26 of the insulating material block contains two incisions in a common plane, which extend from two opposite diagonal sides 28 and 29 to the vicinity of the other incision, leaving a central piece securing the cohesion of the block, in the extension of which the partition wall 27 is arranged As FIG. 3 shows three incisions 31, 32 and 33 are provided for the contact spring set and three incisions 34, 35 and 36 are provided for the contact spring assembly C. The intended for receiving the outer mating contact spring 25 incision 31 is inclined against the base surface 40 of the insulating material block, which is provided with two insertion pins 37 and 38, in such a way that the contact spring 25, when inserted into this incision while simultaneously resting on a support arm 41, receives the necessary bias necessary for secure contact with the mating contact of the contact spring 22 is required; When the relay is switched on, this middle contact spring is moved by the hinged armature 16 in the direction of the contact spring 25 by means of the pimp 21.This outer contact spring rests on the support arm 41 with the prestress forced by the inclination of the slot 31 and is thereby in the correct position for making contact Position fixed exactly. In an analogous manner, the notch 33 intended to accommodate the inner mating contact spring 24 is designed to rise upwards and is assigned to a second support arm 42 on which the contact spring 24 comes to rest from below under pretension when the middle contact spring 22 with its contact piece 43 begins to lift off Support arm 42 determines precisely that position of the central contact spring 22 at which the connection to the contact piece 44 of the contact spring 24 is released. The inclination of the incision 32 intended for the central contact spring 22 is directed slightly downwards, whereby, in connection with the pimple 21, the contact pressure between the contact pieces 43 and 44 which is necessary in the rest position of the relay is generated.

Für die beiden Gegenkontaktfedern des Kontaktfedersatzes C von denen in F i g. 2 nur die äußere Gegenkontaktfeder 45 erkennbar ist, sind ebenfalls zwei Stützarme 46 und 47 vorgesehen. Diese Stützarme erlauben ebenso wie die Stützarme 41 und 42 ein geringfügiges Nachgeben der zugehörigen Kontaktfedern bei der Kontaktgabe unter dem Schaltdruck, so daß an den Kontaktflächen eine wenn auch nur geringe Gleitreibung entsteht, welche eine dauerhafte gute Kontaktgabe sicherstellt. Von den Stützarmen wird außerdem die Aus- und Einschaltlage fixiert. Trotz der geringen Abmessung des Kleinrelais ergibt sich infolge dieser Anordnung eine sichere Bestimmung für das Schaltverhalten.For the two mating contact springs of the contact spring set C of those in FIG. 2 only the outer one Counter-contact spring 45 can be seen, two support arms 46 and 47 are also provided. These support arms allow just like the support arms 41 and 42 a slight yield of the associated contact springs when contact is made under the switching pressure, so that at the contact surfaces, even if only slight Sliding friction arises, which ensures permanent good contact. From the support arms in addition, the switch-off and switch-on position is fixed. Despite the small size of the small relay, this results in this arrangement a reliable determination for the switching behavior.

Die Trennwand 27 ist zur Führung des Pimpels 21 mit einem nutförmigen Ausschnitt 50 versehen. In diesem Ausschnitt kann der Pimpel beim Anzug des Relais so weit hochgeschoben werden, daß er mit seinen seitlichen Ansätzen 51 die mittlere Kontaktfeder 22 an die äußere Gegenkontaktfeder 25 drücken kann.The partition wall 27 is provided with a groove-shaped cutout 50 for guiding the pimp 21. In this When the relay is activated, the pimple can be pushed up so far that he can with his lateral lugs 51, the middle contact spring 22 can press against the outer mating contact spring 25.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

Claim:

Electromagnetic relay with two contact spring sets, which have essentially immovable contact springs which are also movable by means of an actuating element, which run approximately parallel to one another and are elastically pretensioned, and with a block of insulating material serving as a contact spring holding device, which consists of an end piece provided with incisions for inserting the contact springs as well as a web, which extends from the end piece into the area between the two contact spring sets and in their longitudinal direction and which carries support arms on both sides at its free end, which are transverse to the contact springs and on both sides of the? The web forms contact surfaces for the essentially immobile contact springs in the vicinity of their contact pieces, characterized in that the web is designed as an electrically insulating partition (27) securing the two contact spring sets (B and C) against flashovers, and that the elastic pretensioning of the contact springs (22; 24; 25; 45) exclusively by inclining the incisions (31 to 36) in the end piece (26) of the insulating material block (26, 27) with respect to its base surface (40) and by the support arms (41; 42; 46; 47) or the actuating member (21) is determined and that the actuating member (21) is guided in a groove-shaped cutout (50) of the partition (27) and is designed as an insulating material which is supported on the relay armature (16)

3535

The invention relates to an electromagnetic relay with two sets of contact springs, essentially have immobile and also movable by means of an actuator contact springs which run approximately parallel to each other and are elastically biased, and with a contact spring holding device serving block of insulating material, which consists of a with notches for inserting the contact springs provided end piece and a web, which extends from the end piece into the area between the two sets of contact springs and extends in their longitudinal direction and that on both sides at its free end Carrying support arms that are transverse to the contact springs and on both sides of the web contact surfaces for the im form essential immobile contact springs in the vicinity of their contact pieces.

In a known relay of this type (DT-AS 36 654) the web protruding into the area between the contact spring sets ends in front of the contact pieces of the contact springs, and the actuating element is arranged in front of the contact spring sets in such a way that the free ends of the movable contact springs on the actuating element are supported. To achieve the _ω elastic pretensioning, the contact springs are angled approximately in the middle between their clamping points and their free ends and are also supported on the support arms or on the actuating member. _{Since a predetermined h} <-, contact pressure must be adhered to as precisely as possible for the relay to function properly, difficulties arise with this arrangement which are greater the higher the contact pressure is intended to be. This pressure is dependent on the preload that can be achieved by bending the springs, so that either very small manufacturing tolerances must be observed when bending the springs or readjustment of the springs with regard to the contact pressure is necessary When the contacts are actuated, an electric arc occurs, which increases the risk of voltage flashovers between the two sets of contacts. In addition, since the contacts of the two sets of contact springs lie freely next to each other, a minimum distance between the sets of contacts must not be exceeded in order to ensure the required dielectric strength.

The invention is based on the object of designing the relay so that it is extremely small in space Dimensions of the contact arrangement has a high dielectric strength and, moreover, simple and can be mass-produced cheaply

This object is achieved according to the invention in that the web as an electrically insulating, the two Contact spring sets against voltage arcing securing partition is designed that the elastic The contact springs are pretensioned exclusively by inclining the incisions in the end piece of the insulating material block with respect to its base area and is determined by the support arms or the actuating member and that the actuator is guided in a groove-shaped section of the partition and as an insulating material pimple is formed, which is supported on the relay armature.

Protection is only claimed for this combination of features

The formation of the web as the two sets of contact springs securing against voltage flashovers Partition wall enables the two sets of contact springs to be arranged close to one another without affecting the dielectric strength is adversely affected by this. As the actuator for the movable contact springs the partition is guided, the movable contact springs do not need to protrude beyond the partition, so that a protection against voltage flashovers is guaranteed over the entire length of the contact springs is. The clamping of the contact springs in the inclined to the base of the insulating block Incisions result in connection with the support of the contact springs on the support arms or on the actuating member an elastic preload that is largely independent of manufacturing tolerances and that has a high Accuracy of the contact pressure guaranteed. In this way, a high contact pressure can be selected, see above that the risk of arcing when the contacts are operated is low. The inventive Training of the relay also has considerable advantages in terms of manufacturing technology, since that of the known There is no need for a bending process for the contact springs and a simple assembly without a relay Readjustment is possible.

Since the actuator is guided in a groove-shaped cutout of the partition and as an insulating material pimple formed, which is supported on the relay armature, it can in the area between the contact pieces the contact springs and their clamping points are arranged so that necessary for the guidance There is a gap to the contact pieces, which guarantees sufficient security against voltage flashovers in the area of the actuating element.