EP1575075B1 - Contact unit for electromagnetic relays - Google Patents

Contact unit for electromagnetic relays Download PDF

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Publication number
EP1575075B1
EP1575075B1 EP05012458A EP05012458A EP1575075B1 EP 1575075 B1 EP1575075 B1 EP 1575075B1 EP 05012458 A EP05012458 A EP 05012458A EP 05012458 A EP05012458 A EP 05012458A EP 1575075 B1 EP1575075 B1 EP 1575075B1
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EP
European Patent Office
Prior art keywords
contact
spring
unit
fixed
couple
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
EP05012458A
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German (de)
French (fr)
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EP1575075A2 (en
EP1575075A3 (en
Inventor
Johannes Oberndorfer
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Panasonic Electric Works Europe AG
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Panasonic Electric Works Europe AG
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Publication date
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Priority to SI9931047T priority Critical patent/SI1575075T1/en
Publication of EP1575075A2 publication Critical patent/EP1575075A2/en
Publication of EP1575075A3 publication Critical patent/EP1575075A3/en
Application granted granted Critical
Publication of EP1575075B1 publication Critical patent/EP1575075B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/548—Contact arrangements for miniaturised relays
    • 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
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2075—T-shaped bridge; bridging contact has lateral arm for mounting resiliently or on a pivot
    • 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
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2083—Bridging contact surfaces directed at an oblique angle with respect to the movement of the bridge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts

Definitions

  • twin contact springs as similar from DE-B-11 75 807 .
  • DE-U-94 04 775 and DE-C-972 072 are known, but there is the difficulty that the spring arms formed by the longitudinal slot break more easily than the undivided spring. In such a case, although the relay itself is still functional, but the broken spring arm can lead to unforeseen short circuits.
  • Another problem of the known twin contact spring is that the individual spring arms are much softer than the undivided spring, so that when welding a contact of the corresponding spring arm is not stiff enough to hold the actuator in the closed contact position. For these reasons, the use of the known twin contact springs in safety relays is not permitted.
  • DE-A-32 24 468 shows an arrangement in which the contact points of two fixed contacts work together with a common contact point of a bridge contact spring.
  • a contact unit with the features specified in the preamble of claim 1 is made EP 0 081 164 A1 and DE-U-90 15 406 known. Both writings show no safety relays.
  • the invention has for its object to provide a contact unit, the reliability of the contact in safety relays, i. Relay with positively driven contacts, increased.
  • two contact points are provided on the contact spring, which are arranged transversely to the longitudinal extent of the contact spring and cooperate with the same fixed contact or provided with this mating contact points, wherein the two contact points are formed on the fixed contact in the form of a common contact piece.
  • the fact that the contact spring is not only flexible in at least one area, but also has increased torsional ability about its longitudinal axis, ensures that both contact pairs close even when the free end of the contact spring carrying the contact pieces is not parallel to the fixed contact bearing the mating contacts runs.
  • the contact spring according to the invention is obtained continuously in its one-piece shape, so that spring breakage is less likely and possibly leads to a complete failure of the relay by interruption.
  • the contact unit is formed so that the contact spring against the fixed contact is inclined, so that a first closing and last opening Vor animation and a last closing and first opening main contact arise.
  • the first closing and last-opening contact pair is equipped with the properties suitable for a load contact, while the other pair of contacts has the qualities of a signal contact.
  • FIGS. 1 to 6 serve for explanation; they show no contact arrangements according to the invention.
  • the in the FIGS. 1 and 2 shown contact unit consists essentially of a contact spring 10 which is fastened with its one end to a support 11 , riveted about, is a free end of the contact spring 10 opposite fixed contact 12 and an attacking on the contact spring 10 actuator 13, in the here assumed embodiment with an in FIG. 2 indicated relay armature 14 is coupled.
  • the fixed contact 12 opposite free end of the contact spring 10 is widened relative to its main part and carries two contact pieces 15, 16 which are arranged transversely to the longitudinal extent of the contact spring 10 side by side (in the drawing below each other). Likewise is the Fixed contact 12 with two contact pieces 17, 18 which face the contact pieces 15, 16 of the contact spring 10 and cooperate with each of these.
  • the free end of the contact spring 10 is at an angle to the fixed contact 12, so that the contact pieces 15, 16 of the contact spring 10 connecting straight line intersects the contact pieces 17, 18 of the fixed contact 12 connecting line at an acute angle.
  • This inclination of the free end of the contact spring 10 is due to the fact that the contact spring is vorortiert in a located between its fixed and free end torsion region 19 about its longitudinal axis.
  • the actuator 13 is arranged and configured to engage the contact spring 10 near its free end and to engage with both opposed surfaces of the contact spring 10 .
  • the contact areas 20, 21 of the actuator 13 in the direction of the respective surface of the contact spring 10 are convex.
  • FIG. 2 shows the moment in which the upper contact piece 15 of the contact spring 10, the contact piece 17 of the fixed contact 12 just touched.
  • this pivoting movement is ensured by a sufficiently sized twistability of the torsion 19 until the lower contact pieces 16, 18 touch each other.
  • the subsequent further movement of the actuator 13 to the right in FIG. 2 until the end position of the armature 14 now causes the fixed contact 12 deflected while the contact force is increased at the two contact pairs.
  • the contact piece 15 sized larger than the corresponding to the main or signal contact contact piece 16.
  • the contact pieces 15, 17 of the precontact of less noble material than the contact pieces 16, 18 of the main contact.
  • electromagnetic relay partially shown comprises a base body 22 from which protrudes a yoke leg 23 of a (not shown) coil passing through the yoke.
  • the yoke leg 23 is located between the two arms of the generally H-shaped relay armature 14 in this embodiment , which is pivotally mounted about a vertical center axis on a bearing pin 24 mounted on the base body 22 .
  • the coupled to the relay armature 14 actuator 13 is guided by integrally formed on the base body 22 guide columns 25 in its plane and engages around, as in FIGS. 4 to 6 shown in more detail, the contact spring 10, the contact pieces 15, 16 cooperate with the fixed contact 12 attached contact pieces 17, 18 .
  • the relay is shown equipped with two contact springs 10 . Terminal pins 26 of the fixed contacts 12 protrude from the base body 22 down.
  • the torsion portion 19 is realized by reducing the spring width.
  • the spring 10 in this area 19 also in their material thickness reduced or otherwise treated to increase the torsional ability.
  • the area 19 is between the riveted to the contact carrier 11 fixed end of the contact spring 10 and the attack region of the actuator 13.
  • the contact spring 10 has in this attack area and at its fixed end its full width, which is increased again at the free end, to create between the contact pieces 15 and 16 sufficient distance.
  • the actuator 13 engages the contact spring 10 in a stiffened area.
  • the contact spring 10 extends between the two contact regions 20, 21 of the actuator 13, of which the region 20 is convex or convex, to allow when pressing the contact spring 10 pivoting about its longitudinal central axis and thus a contact on both contact pairs 15, 17 and 16, 18 to ensure.
  • a convex or spherical design is not required. If the contact spring 10 is biased in the closed position, the voltage applied to the opening 21 on its surface 21 of the actuator 13 should be spherical.
  • the two located on the fixed contact 12 contact points are formed on a common contact piece 27 , the contact surface is dimensioned so that they can work together with the two separate contact pieces 15 and 16 of the contact spring.
  • the contact surface of the common contact piece 27 is spherically shaped.
  • An alternative is to arrange a single continuous contact piece on both the contact spring 10 and the fixed contact 12 and to provide at least the contact piece on the contact spring with two projections for generating two spatially separated contact points.
  • the contact spring 10 is provided in the direction of its longitudinal central axis with a bead 28 which increases the rigidity of the contact spring 10 in its longitudinal direction in the region between the contact pieces 15, 16 and the engagement region of the actuator 13 .
  • a stiffening of the contact spring 10 can be achieved by increasing its thickness in the region between the contact pieces 15, 16 and the engagement region of the actuator 13 .

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

Abstract

A contact unit, comprising an undivided contact spring (10) with a flexible torsion region (19) between its fixed end and its contact points, is new. A contact unit comprises a stationary contact (12) and a contact spring (10) which has two transverse contact points (15,16) on an undivided spring end section and, between its fixed end and the contact points, a flexible region (19) capable of torsion about its longitudinal axis.

Description

Zur Erhöhung der Kontaktsicherheit von elektromagnetischen Relais ist es beispielsweise aus DE-C-32 24 013 bekannt, die Kontaktfeder durch einen Längsschlitz mit zwei federnden Enden zu versehen und jedes Ende mit einem Kontaktstück auszustatten, das mit einem entsprechenden Gegenkontaktstück an einem gemeinsamen Festkontakt zusammenarbeitet. Die Wahrscheinlichkeit, daß beide Kontaktpaare etwa infolge von Verunreinigungen durch kleinste Glasfasern, Spritzgrate oder dergleichen ausfallen, ist wesentlich geringer als bei Einzelkontakten.For example, to increase the contact reliability of electromagnetic relays DE-C-32 24 013 known to provide the contact spring through a longitudinal slot with two resilient ends and equip each end with a contact piece, which cooperates with a corresponding mating contact piece on a common fixed contact. The likelihood that both pairs of contacts fail, for example as a result of contamination by the smallest glass fibers, spray burrs or the like, is much lower than in individual contacts.

Bei derartigen "Twin"-Kontaktfedern, wie sie ähnlich auch aus DE-B-11 75 807 , DE-U-94 04 775 und DE-C-972 072 bekannt sind, besteht aber die Schwierigkeit, daß die durch den Längsschlitz gebildeten Federarme leichter brechen als die ungeteilte Feder. In einem solchen Fall ist zwar das Relais an sich noch funktionsfähig, der abgebrochene Federarm kann aber zu unvorhergesehenen Kurzschlüssen führen. Ein weiteres Problem der bekannten Twin-Kontaktfeder besteht darin, daß die einzelnen Federarme viel weicher sind als die ungeteilte Feder, so daß bei Verschweißen eines Kontaktes der entsprechende Federarm nicht genügend steif ist, um den Betätiger in der geschlossenen Kontaktstellung festzuhalten. Aus diesen Gründen ist der Einsatz der bekannten Twin-Kontaktfedern bei Sicherheitsrelais nicht zulässig.In such "twin" contact springs, as similar from DE-B-11 75 807 . DE-U-94 04 775 and DE-C-972 072 are known, but there is the difficulty that the spring arms formed by the longitudinal slot break more easily than the undivided spring. In such a case, although the relay itself is still functional, but the broken spring arm can lead to unforeseen short circuits. Another problem of the known twin contact spring is that the individual spring arms are much softer than the undivided spring, so that when welding a contact of the corresponding spring arm is not stiff enough to hold the actuator in the closed contact position. For these reasons, the use of the known twin contact springs in safety relays is not permitted.

Aus DE-C-32 24 468 ist eine Kontaktanordnung bekannt, bei der die Kontaktfeder zwei mit getrennten Festkontakten zusammenarbeitende Kontaktstücke trägt. Abgesehen davon, daß bei derartigen Brückenkontakten der Gesamt-Kontaktwiderstand doppelt so hoch ist wie bei einem Einzelkontakt, erhöht diese Anordnung nicht die Sicherheit der Kontaktgabe sondern die der Kontaktöffnung.Out DE-C-32 24 468 a contact arrangement is known in which the contact spring carries two cooperating with separate fixed contacts contact pieces. Apart from the fact that in such bridge contacts the total contact resistance is twice as high as in a single contact, this arrangement does not increase the security of the contact but the contact opening.

Bekannt sind ferner sogenannte "Kronenkontakte", bei denen mindestens eine von zwei zusammenwirkenden Kontaktnieten einen erhabenen Rand aufweist, so daß bei geringer gegenseitiger Versetzung der beiden Nieten zwei Kontaktstellen entstehen. Abgesehen davon, daß die so gebildeten Kontaktstellen sehr kleinflächig sind, nutzt sich der erhabene Rand beim Betrieb verhältnismäßig rasch ab, so daß die beabsichtigte Doppelkontaktwirkung schnell verloren geht.Also known are so-called "crown contacts", in which at least one of two co-operating contact rivets has a raised edge, so that two contact points arise at low mutual displacement of the two rivets. Apart from the fact that the contact points formed in this way are very small, the raised edge consumes relatively quickly during operation, so that the intended double contact effect is quickly lost.

DE-A-32 24 468 zeigt eine Anordnung, bei der die Kontaktstellen zweier Festkontakte mit einer gemeinsamen Kontaktstelle einer Brückenkontaktfeder zusammenarbeiten. DE-A-32 24 468 shows an arrangement in which the contact points of two fixed contacts work together with a common contact point of a bridge contact spring.

Eine Kontakteinheit mit den im Oberbegriff des Anspruchs 1 angegebenen Merkmalen ist aus EP 0 081 164 A1 und DE-U-90 15 406 bekannt. Beide Schriften zeigen keine Sicherheitsrelais.A contact unit with the features specified in the preamble of claim 1 is made EP 0 081 164 A1 and DE-U-90 15 406 known. Both writings show no safety relays.

Der Erfindung liegt die Aufgabe zugrunde, eine Kontakteinheit zu schaffen, die die Zuverlässigkeit der Kontaktgabe bei Sicherheitsrelais, d.h. Relais mit zwangsgeführten Kontakten, erhöht.The invention has for its object to provide a contact unit, the reliability of the contact in safety relays, i. Relay with positively driven contacts, increased.

Die erfindungsgemäße Lösung dieser Aufgabe ist im Anspruch 1 gekennzeichnet.The inventive solution to this problem is characterized in claim 1.

Bei der danach gestalteten Kontakteinheit sind an der Kontaktfeder zwei Kontaktstellen vorgesehen, die quer zur Längserstreckung der Kontaktfeder angeordnet sind und mit demselben Festkontakt bzw. mit an diesem vorgesehenen Gegenkontaktstellen zusammenarbeiten, wobei die beiden Kontaktstellen am Festkontakt in Form eines gemeinsamen Kontaktstücks ausgebildet sind. Die Tatsache, daß die Kontaktfeder in mindestens einem Bereich nicht nur biegsam ist, sondern auch um ihre Längsachse erhöhte Torsionsfähigkeit aufweist, gewährleistet, daß beide Kontaktpaare auch dann schließen, wenn das die Kontaktstücke tragende freie Ende der Kontaktfeder nicht parallel zu dem die Gegenkontakte tragenden Festkontakt verläuft.In the subsequently designed contact unit, two contact points are provided on the contact spring, which are arranged transversely to the longitudinal extent of the contact spring and cooperate with the same fixed contact or provided with this mating contact points, wherein the two contact points are formed on the fixed contact in the form of a common contact piece. The fact that the contact spring is not only flexible in at least one area, but also has increased torsional ability about its longitudinal axis, ensures that both contact pairs close even when the free end of the contact spring carrying the contact pieces is not parallel to the fixed contact bearing the mating contacts runs.

Im Gegensatz zu der oben erwähnten Twin-Kontaktfeder ist bei der erfindungsgemäßen Kontakteinheit die Kontaktfeder durchgehend in ihrer einteiligen Form erhalten, so daß Federbruch weniger wahrscheinlich ist und gegebenenfalls zu einem vollständigen Ausfall des Relais durch Unterbrechung führt.In contrast to the above-mentioned twin contact spring, the contact spring according to the invention is obtained continuously in its one-piece shape, so that spring breakage is less likely and possibly leads to a complete failure of the relay by interruption.

Vorteilhafte Gestaltungen für den Bereich erhöhter Torsionsfähigkeit sind in Anspruch 2 angegeben.Advantageous designs for the area of increased torsional capability are given in claim 2.

Mit den Weiterbildungen der Erfindung nach den Ansprüchen 3 bis 6 läßt sich eine Zwangsführung der Kontaktfeder durch den Betätiger, insbesondere auch beim Öffnen, erreichen.With the developments of the invention according to claims 3 to 6, a positive guidance of the contact spring by the actuator, especially when opening, can be achieved.

Die Gestaltung des die Kontaktfeder führenden Betätigers gemäß den Ansprüchen 7 und 8 ist zweckmäßig, um das für das erfindungsgemäße Relais typische Torsionsverhalten der Kontaktfeder wirkungsvoll auszunutzen.The design of the contact spring leading actuator according to claims 7 and 8 is useful to effectively exploit the typical for the relay according to the invention torsional behavior of the contact spring.

In der Weiterbildung der Erfindung nach Anspruch 9 ist die Kontakteinheit so ausgebildet, daß die Kontaktfeder gegenüber dem Festkontakt geneigt ist, so daß ein zuerst schließender und zuletzt öffnender Vorkontakt und ein zuletzt schließender und zuerst öffnender Hauptkontakt entstehen. Diese Gestaltung hat den Vorteil einer weicheren Kontaktgabe mit verringertem Prellverhalten.In the development of the invention according to claim 9, the contact unit is formed so that the contact spring against the fixed contact is inclined, so that a first closing and last opening Vorkontakt and a last closing and first opening main contact arise. This design has the advantage of a softer contact with reduced bounce.

In der Ausgestaltung der Erfindung nach den Ansprüchen 10 bis 12 ist das zuerst schließende und zuletzt öffnende Kontaktpaar mit den für einen Lastkontakt zweckmäßigen Eigenschaften ausgestattet, während das andere Kontaktpaar die Qualitäten eines Signalkontakts aufweist.In the embodiment of the invention according to claims 10 to 12, the first closing and last-opening contact pair is equipped with the properties suitable for a load contact, while the other pair of contacts has the qualities of a signal contact.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnungen näher erläutert; darin zeigt

Figur 1
eine schematische Darstellung einer Kontakteinheit in Seitenansicht,
Figur 2
eine Stirnansicht in Richtung des Pfeils II der Figur 1,
Figur 3
eine perspektivische Darstellung eines Teils eines elektromagnetischen Relais mit einer Kontakteinheit gemäß Figur 2,
Figur 4
eine der Figur 1 ähnliche Darstellung der bei dem Relais nach Figur 3 verwendeten Kontakteinheit,
Figur 5
eine Stirnansicht des Betätigers in der Anordnung nach Figur 3 mit einer Kontaktfeder,
Figur 6
eine vergrößerte Darstellung eines Teils der Figur 5, und
Figur 7
ein Ausführungsbeispiel einer erfindungsgemäßen Kontaktanordnung in einer Figur 2 entsprechenden schematischen Darstellung.
An embodiment of the invention will be explained below with reference to the drawings; shows in it
FIG. 1
a schematic representation of a contact unit in side view,
FIG. 2
an end view in the direction of arrow II of FIG. 1 .
FIG. 3
a perspective view of a portion of an electromagnetic relay with a contact unit according to FIG. 2 .
FIG. 4
one of the FIG. 1 similar representation of the relay after FIG. 3 used contact unit,
FIG. 5
an end view of the actuator in the arrangement according to FIG. 3 with a contact spring,
FIG. 6
an enlarged view of a portion of FIG. 5 , and
FIG. 7
an embodiment of a contact arrangement according to the invention in one FIG. 2 corresponding schematic representation.

Die Figuren 1 bis 6 dienen der Erläuterung; sie zeigen keine erfindungsgemäßen Kontaktanordnungen.The FIGS. 1 to 6 serve for explanation; they show no contact arrangements according to the invention.

Die in der Figur 1 und 2 dargestellte Kontakteinheit besteht im wesentlichen aus einer Kontaktfeder 10, die mit ihrem einen Ende an einem Träger 11 befestigt, etwa angenietet, ist, einem dem freien Ende der Kontaktfeder 10 gegenüberstehenden Festkontakt 12 und einem an der Kontaktfeder 10 angreifenden Betätiger 13, der in dem hier angenommenen Ausführungsbeispiel mit einem in Figur 2 angedeuteten Relaisanker 14 gekoppelt ist.The in the FIGS. 1 and 2 shown contact unit consists essentially of a contact spring 10 which is fastened with its one end to a support 11 , riveted about, is a free end of the contact spring 10 opposite fixed contact 12 and an attacking on the contact spring 10 actuator 13, in the here assumed embodiment with an in FIG. 2 indicated relay armature 14 is coupled.

Das dem Festkontakt 12 gegenüberstehende freie Ende der Kontaktfeder 10 ist gegenüber ihrem Hauptteil verbreitert und trägt zwei Kontaktstücke 15, 16, die quer zur Längserstreckung der Kontaktfeder 10 nebeneinander (in der Zeichnung untereinander) angeordnet sind. Ebenso ist der Festkontakt 12 mit zwei Kontaktstücken 17, 18 versehen, die den Kontaktstücken 15, 16 der Kontaktfeder 10 gegenüberstehen und jeweils mit diesen zusammenarbeiten.The fixed contact 12 opposite free end of the contact spring 10 is widened relative to its main part and carries two contact pieces 15, 16 which are arranged transversely to the longitudinal extent of the contact spring 10 side by side (in the drawing below each other). Likewise is the Fixed contact 12 with two contact pieces 17, 18 which face the contact pieces 15, 16 of the contact spring 10 and cooperate with each of these.

Wie aus Figur 2 ersichtlich, steht das freie Ende der Kontaktfeder 10 unter einem Winkel zu dem Festkontakt 12, so daß die die Kontaktstücke 15, 16 der Kontaktfeder 10 verbindende Gerade die die Kontaktstücke 17, 18 des Festkontakts 12 verbindende Gerade unter einem spitzen Winkel schneidet. Diese Schrägstellung des freien Endes der Kontaktfeder 10 kommt dadurch zustande, daß die Kontaktfeder in einem zwischen ihrem festen und freien Ende gelegenen Torsionsbereich 19 um ihre Längsachse vortordiert ist.How out FIG. 2 seen, the free end of the contact spring 10 is at an angle to the fixed contact 12, so that the contact pieces 15, 16 of the contact spring 10 connecting straight line intersects the contact pieces 17, 18 of the fixed contact 12 connecting line at an acute angle. This inclination of the free end of the contact spring 10 is due to the fact that the contact spring is vorortiert in a located between its fixed and free end torsion region 19 about its longitudinal axis.

Der Betätiger 13 ist so angeordnet und gestaltet, daß er an der Kontaktfeder 10 nahe deren freiem Ende angreift und mit beiden gegenüberliegenden Flächen der Kontaktfeder 10 in Eingriff treten kann. Dabei sind die Berührungsbereiche 20, 21 des Betätigers 13 in Richtung der jeweiligen Fläche der Kontaktfeder 10 konvex geformt.The actuator 13 is arranged and configured to engage the contact spring 10 near its free end and to engage with both opposed surfaces of the contact spring 10 . In this case, the contact areas 20, 21 of the actuator 13 in the direction of the respective surface of the contact spring 10 are convex.

Wird bei Betätigung des Relais der Anker 14 in Richtung des Pfeiles A betätigt, so bewegt er den Betätiger 13 in Figur 2 nach rechts. Figur 2 zeigt den Moment, in dem das obere Kontaktstück 15 der Kontaktfeder 10 das Kontaktstück 17 des Festkontakts 12 gerade berührt. Bei weiterer Bewegung des Betätigers 13 nach rechts in Figur 2 schwenkt das vordere Ende der Kontaktfeder 10 um die Berührungsstelle zwischen den Kontaktstücken 15 und 17, wobei diese Schwenkbewegung durch eine ausreichend bemessene Tordierbarkeit des Torsionsbereichs 19 gewährleistet ist, bis die unteren Kontaktstücke 16, 18 einander berühren. Die anschließende weitere Bewegung des Betätigtes 13 nach rechts in Figur 2 bis zur Endstellung des Ankers 14 bewirkt nun, daß der Festkontakt 12 ausgelenkt und dabei die Kontaktkraft an den beiden Kontaktpaaren erhöht wird.If the armature 14 is actuated in the direction of arrow A when the relay is actuated, it moves the actuator 13 in FIG. 2 to the right. FIG. 2 shows the moment in which the upper contact piece 15 of the contact spring 10, the contact piece 17 of the fixed contact 12 just touched. Upon further movement of the actuator 13 to the right in FIG. 2 pivots the front end of the contact spring 10 to the point of contact between the contact pieces 15 and 17, this pivoting movement is ensured by a sufficiently sized twistability of the torsion 19 until the lower contact pieces 16, 18 touch each other. The subsequent further movement of the actuator 13 to the right in FIG FIG. 2 until the end position of the armature 14 now causes the fixed contact 12 deflected while the contact force is increased at the two contact pairs.

Während der beschriebenen Schwenkbewegung des die Kontaktstücke 15, 16 tragenden freien Endes der Kontaktfeder 10 rollt diese an dem konvexen Berührungsbereichs 20 des Betätigers 13 ab.During the described pivoting movement of the contact pieces 15, 16 supporting the free end of the contact spring 10 , this rolls off at the convex contact area 20 of the actuator 13 from.

Zum Öffnen wird der Relaisanker 14 in Richtung des Pfeiles B bewegt, so daß nun der gegenüberliegende Berührungsbereich 21 des Betätigers 13 mit der anderen Fläche der Kontaktfeder 10 in Eingriff gelangt und bewirkt, daß die Kontaktstücke 15, 16 der Kontaktfeder 10 von den Kontaktstücken 17, 18 des Festkontakts 12 abgehoben werden. Dabei öffnet sich zunächst das untere Kontaktpaar 16, 18 und anschließend das obere Kontaktpaar 15, 17. To open the relay armature 14 is moved in the direction of arrow B, so that now the opposite contact portion 21 of the actuator 13 comes into engagement with the other surface of the contact spring 10 and causes the contact pieces 15, 16 of the contact spring 10 of the contact pieces 17, 18 of the fixed contact 12 are lifted. This initially opens the lower contact pair 16, 18 and then the upper contact pair 15, 17.

Gemäß der erläuterten Funktionsweise bildet das obere Kontaktpaar 15, 17 einen Vorkontakt und das untere Kontaktpaar 16, 18 einen Hauptkontakt. Da der zuerst schließende und zuletzt öffnende Vorkontakt einen Lastkontakt bildet und rascher verschleißt, ist, wie aus Figur 1 ersichtlich, das Kontaktstück 15 größer dimensioniert als das zu dem Haupt- oder Signalkontakt gehörige Kontaktstück 16. Ferner bestehen die Kontaktstücke 15, 17 des Vorkontakts aus weniger edlem Material als die Kontaktstücke 16, 18 des Hauptkontakts. Beispielsweise können die Kontaktstücke 15, 17 aus AgSnO und die Kontaktstücke 16, 18 aus einer AuAg-Legierung bestehen.According to the described operation forms the upper contact pair 15, 17 a precontact and the lower contact pair 16, 18 a main contact. Since the first closing and last opening pre-contact forms a load contact and wears out faster, is how out FIG. 1 can be seen, the contact piece 15 sized larger than the corresponding to the main or signal contact contact piece 16. Further, the contact pieces 15, 17 of the precontact of less noble material than the contact pieces 16, 18 of the main contact. For example, the contact pieces 15, 17 made of AgSnO and the contact pieces 16, 18 made of an AuAg alloy.

Anstelle der oben erwähnten Vortordierung des Torsionsbereichs 19 zur Erzielung der in Figur 2 veranschaulichten Schrägstellung des freien Endes der Kontaktfeder 10 gegenüber dem Festkontakt 12 läßt sich die gleiche Funktionsweise auch durch Schrägstellung des Festkontaktes 12 erreichen oder auch durch Schrägstellung des Trägers 11 samt der Kontaktfeder 10, die in diesem Fall in der Ruhestellung eben ist.Instead of the above-mentioned predilection of the torsion 19 to achieve the in FIG. 2 illustrated skewing of the free end of the contact spring 10 relative to the fixed contact 12 , the same operation can be achieved by tilting the fixed contact 12 or by tilting the support 11 together with the contact spring 10, which is flat in this case in the rest position.

Das in der perspektivischen Darstellung der Figur 3 (unter Weglassung der Gehäusekappe) teilweise gezeigte elektromagnetische Relais umfaßt einen Grundkörper 22, aus dem ein Jochschenkel 23 eines eine (nicht gezeigte) Spule durchsetzenden Joches herausragt. Der Jochschenkel 23 befindet sich zwischen den beiden Armen des in diesem Ausführungsbeispiel generell H-förmigen Relaisankers 14, der um eine senkrechte Mittelachse an einem am Grundkörper 22 angebrachten Lagerzapfen 24 schwenkbar gelagert ist.This in the perspective view of the FIG. 3 (omitting the housing cap) electromagnetic relay partially shown comprises a base body 22 from which protrudes a yoke leg 23 of a (not shown) coil passing through the yoke. The yoke leg 23 is located between the two arms of the generally H-shaped relay armature 14 in this embodiment , which is pivotally mounted about a vertical center axis on a bearing pin 24 mounted on the base body 22 .

Der mit dem Relaisanker 14 gekoppelte Betätiger 13 wird von am Grundkörper 22 angeformten Führungssäulen 25 in seiner Ebene verschiebbar geführt und umgreift, wie in Figur 4 bis 6 näher dargestellt, die Kontaktfeder 10, deren Kontaktstücke 15, 16 mit den am Festkontakt 12 angebrachten Kontaktstücken 17, 18 zusammenarbeiten. In Figur 3 ist das Relais mit zwei Kontaktfedern 10 bestückt dargestellt. Anschlußstifte 26 der Festkontakte 12 ragen aus dem Grundkörper 22 nach unten heraus.The coupled to the relay armature 14 actuator 13 is guided by integrally formed on the base body 22 guide columns 25 in its plane and engages around, as in FIGS. 4 to 6 shown in more detail, the contact spring 10, the contact pieces 15, 16 cooperate with the fixed contact 12 attached contact pieces 17, 18 . In FIG. 3 the relay is shown equipped with two contact springs 10 . Terminal pins 26 of the fixed contacts 12 protrude from the base body 22 down.

Bei der in Figur 4 näher gezeigten Kontaktfeder 10 ist der Torsionsbereich 19 durch Verringerung der Federbreite realisiert. Alternativ oder zusätzlich dazu kann die Feder 10 in diesem Bereich 19 auch in ihrer Materialstärke reduziert oder in sonstiger Weise behandelt sein, um die Torsionsfähigkeit zu erhöhen.At the in FIG. 4 shown contact spring 10 , the torsion portion 19 is realized by reducing the spring width. Alternatively or additionally, the spring 10 in this area 19 also in their material thickness reduced or otherwise treated to increase the torsional ability.

Wie dargestellt, befindet sich der Bereich 19 zwischen dem am Kontaktträger 11 angenieteten festen Ende der Kontaktfeder 10 und dem Angriffsbereich des Betätigers 13. Die Kontaktfeder 10 hat in diesem Angriffsbereich sowie an ihrem festen Ende ihre volle Breite, die am freien Ende nochmals erhöht ist, um zwischen den Kontaktstücken 15 und 16 genügend Abstand zu schaffen. Der Betätiger 13 greift an der Kontaktfeder 10 in einem versteiften Bereich an.As shown, the area 19 is between the riveted to the contact carrier 11 fixed end of the contact spring 10 and the attack region of the actuator 13. The contact spring 10 has in this attack area and at its fixed end its full width, which is increased again at the free end, to create between the contact pieces 15 and 16 sufficient distance. The actuator 13 engages the contact spring 10 in a stiffened area.

Wie aus Figur 5 und der Teilvergrößerung der Figur 6 hervorgeht, verläuft die Kontaktfeder 10 zwischen den beiden Berührungsbereichen 20, 21 des Betätigers 13, von denen der Bereich 20 konvex oder ballig gestaltet ist, um beim Andrücken der Kontaktfeder 10 ein Schwenken um ihre Längsmittelachse zu gestatten und damit eine Kontaktgabe an beiden Kontaktpaaren 15, 17 und 16, 18 zu gewährleisten. Bei dem gegenüberliegenden Berührungsbereich 21, der mit der Kontaktfeder 10 beim Öffnen in Berührung gelangt, ist eine konvexe oder ballige Gestaltung nicht erforderlich. Sofern die Kontaktfeder 10 in die Schließstellung vorgespannt ist, soll die beim Öffnen an ihr anliegende Fläche 21 des Betätigers 13 ballig sein.How out FIG. 5 and the partial enlargement of the FIG. 6 shows, the contact spring 10 extends between the two contact regions 20, 21 of the actuator 13, of which the region 20 is convex or convex, to allow when pressing the contact spring 10 pivoting about its longitudinal central axis and thus a contact on both contact pairs 15, 17 and 16, 18 to ensure. In the opposite contact region 21, which comes into contact with the contact spring 10 during opening, a convex or spherical design is not required. If the contact spring 10 is biased in the closed position, the voltage applied to the opening 21 on its surface 21 of the actuator 13 should be spherical.

Bei der in Figur 7 dargestellten erfindungsgemäßen Ausführungsform sind die beiden am Festkontakt 12 gelegenen Kontaktstellen an einem gemeinsamen Kontaktstück 27 ausgebildet, dessen Kontaktfläche so bemessen ist, daß sie mit den beiden getrennten Kontaktstücken 15 und 16 der Kontaktfeder zusammenarbeiten kann. Um eine einwandfreie Kontaktgabe auch bei tordierter Kontaktfeder 10 oder schräggestelltem Festkontakt 12 zu ermöglichen, ist die Kontaktfläche des gemeinsamen Kontaktstücks 27 ballig geformt.At the in FIG. 7 illustrated embodiment, the two located on the fixed contact 12 contact points are formed on a common contact piece 27 , the contact surface is dimensioned so that they can work together with the two separate contact pieces 15 and 16 of the contact spring. In order to allow proper contact even with twisted contact spring 10 or inclined fixed contact 12 , the contact surface of the common contact piece 27 is spherically shaped.

Eine Alternative besteht darin, sowohl an der Kontaktfeder 10 als auch am Festkontakt 12 ein einzelnes durchgehendes Kontaktstück anzuordnen und mindestens das Kontaktstück an der Kontaktfeder mit zwei Vorsprüngen zur Erzeugung zweier räumlich getrennter Kontaktstellen zu versehen.An alternative is to arrange a single continuous contact piece on both the contact spring 10 and the fixed contact 12 and to provide at least the contact piece on the contact spring with two projections for generating two spatially separated contact points.

Wie in Figur 7 ferner dargestellt, ist die Kontaktfeder 10 in Richtung ihrer Längsmittelachse mit einer Sicke 28 versehen, die die Steifigkeit der Kontaktfeder 10 in ihrer Längsrichtung im Bereich zwischen den Kontaktstücken 15, 16 und dem Angriffsbereich des Betätigers 13 vergrößert.As in FIG. 7 also shown, the contact spring 10 is provided in the direction of its longitudinal central axis with a bead 28 which increases the rigidity of the contact spring 10 in its longitudinal direction in the region between the contact pieces 15, 16 and the engagement region of the actuator 13 .

Anstelle der gezeigten Sicke 28 läßt sich eine Versteifung der Kontaktfeder 10 durch Erhöhung ihrer Dicke im Bereich zwischen den Kontaktstücken 15, 16 und dem Angriffsbereich des Betätigers 13 erzielen.Instead of the bead 28 shown, a stiffening of the contact spring 10 can be achieved by increasing its thickness in the region between the contact pieces 15, 16 and the engagement region of the actuator 13 .

Besteht die Versteifung in der in Figur 7 gezeigten Sicke 28, so kann diese über die gesamte Länge der Kontaktfeder 10 bis zu ihrem am Kontaktträger 10 befestigten Ende durchgehen; eine solche in Richtung der Längsmittelachse und damit in der neutralen Zone der Kontaktfeder 10 verlaufende Sicke 28 führt zwar zu einer verringerten Biegsamkeit auch im Bereich 19, beeinträchtigt aber die Torsionsfähigkeit in diesem Bereich nur wenig.Is the stiffening in the in FIG. 7 shown bead 28, so they can go over the entire length of the contact spring 10 to its fixed to the contact carrier 10 end; Such beading 28 , which extends in the direction of the longitudinal center axis and thus in the neutral zone of contact spring 10 , leads to reduced flexibility even in region 19, but does not affect the torsional ability in this region to any great extent.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Kontaktfedercontact spring
1111
Träger für 10 Carrier for 10
1212
Festkontaktfixed contact
1313
Betätigeractuator
1414
Relaisankerrelay armature
15, 1615, 16
Kontaktstücke an 10 Contact pieces on 10
17, 1817, 18
Kontaktstücke an 12 Contact pieces at 12
1919
Torsionsbereich von 10 Torsion range of 10
20, 2120, 21
Berührungsbereiche in 13 Touch areas in 13
2222
Grundkörperbody
2323
Jochschenkelyoke leg
2424
Lagerzapfenpivot
2525
Führungssäulenguide columns
2626
Anschlußstiftepins
2727
gemeinsames Kontaktstückcommon contact piece
2828
SickeBeading

Claims (12)

  1. A contact unit for electromagnetic relays, including a fixed contact (12) and a contact spring (10) having two contact locations (15, 16) which are arranged transversely of the longitudinal extension of the spring, which are provided on an undivided end portion of the contact spring (10) and which cooperate with the fixed contact, and having, between its fixed end and the contact locations (15, 16), a flexible zone (19) of increased elasticity of torsion about the longitudinal axis of the spring,
    characterised in the contact spring (10) is forcibly guided and the two contact locations (15, 16) of the fixed contact (12) are formed on a common contact piece (27).
  2. The contact unit of claim 1, wherein the contact spring (10) has a smaller width and/or smaller thickness in its zone (19) of increased elasticity than in its other regions.
  3. The contact unit of claim 1 or 2, wherein the contact spring (10) is stiffened in a zone extending from the point of engagement of an actuator (13) to the region of its contact locations (15, 16).
  4. The contact unit of claim 3, wherein stiffening consists in an increased thickness or a deformation.
  5. The contact unit of claim 5, wherein the contact spring (10) has a bead (28) extending along its longitudinal centre axis.
  6. The contact unit of claim 5, wherein the bead (28) extends throughout the length of the contact spring (10).
  7. The contact unit of any preceding claim, including an actuator (13) having a zone (20 or 21) of engagement with the contact spring (10) which is convex toward the contact spring.
  8. The contact unit of claim 7, wherein the actuator (13) engages both sides of the contact spring (10) with a convex zone (20, 21).
  9. The contact unit of any preceding claim, wherein the straight line connecting the two contact locations (15, 16) of the contact spring (10) intersects the straight line connecting the counter contact locations (17, 18) of the fixed contact (12) at an acute angle.
  10. The contact unit of claim 9, wherein the contact location (16) of the last closing and first opening contact couple are made of a nobler contact material than that of the other contact couple.
  11. The contact unit of claim 10, wherein a contact location (15) of the first closing and last opening contact couple is made of AgSnO and that of the other contact couple is made of an AuAg alloy.
  12. The contact unit of any of claims 9 to 11, wherein the contact location (15) of the first opening and last closing contact couple is dimensioned larger than that of the other contact couple.
EP05012458A 1998-12-18 1999-12-01 Contact unit for electromagnetic relays Expired - Lifetime EP1575075B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9931047T SI1575075T1 (en) 1998-12-18 1999-12-01 Contact unit for electromagnetic relays

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19858755 1998-12-18
DE19858755A DE19858755C1 (en) 1998-12-18 1998-12-18 Contact unit, for an electromagnetic safety relay, comprises an undivided contact spring with a flexible torsion region between its fixed end and its contact points
EP99123867A EP1011122B8 (en) 1998-12-18 1999-12-01 Contact unit for electromagnetic relays

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP99123867A Division EP1011122B8 (en) 1998-12-18 1999-12-01 Contact unit for electromagnetic relays
EP99123867.6 Division 1999-12-01

Publications (3)

Publication Number Publication Date
EP1575075A2 EP1575075A2 (en) 2005-09-14
EP1575075A3 EP1575075A3 (en) 2008-09-10
EP1575075B1 true EP1575075B1 (en) 2010-07-28

Family

ID=7891762

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EP99123867A Expired - Lifetime EP1011122B8 (en) 1998-12-18 1999-12-01 Contact unit for electromagnetic relays
EP05012458A Expired - Lifetime EP1575075B1 (en) 1998-12-18 1999-12-01 Contact unit for electromagnetic relays

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP99123867A Expired - Lifetime EP1011122B8 (en) 1998-12-18 1999-12-01 Contact unit for electromagnetic relays

Country Status (9)

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US (2) US6300854B1 (en)
EP (2) EP1011122B8 (en)
JP (1) JP4265057B2 (en)
AT (2) ATE475982T1 (en)
DE (3) DE19858755C1 (en)
DK (1) DK1011122T3 (en)
ES (2) ES2242347T3 (en)
PT (2) PT1575075E (en)
SI (2) SI1575075T1 (en)

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JP2006294459A (en) * 2005-04-12 2006-10-26 Nec Tokin Corp Electromagnetic relay
DE102007034989B3 (en) * 2007-07-26 2009-03-12 Schaltbau Gmbh microswitch
US7859372B2 (en) * 2007-10-24 2010-12-28 Tyco Electronics Corporation Methods and apparatus for reducing bounce between relay contacts
US9160333B2 (en) * 2011-05-06 2015-10-13 Purdue Research Foundation Capacitive microelectromechanical switches with dynamic soft-landing
EP2620966A1 (en) * 2012-01-27 2013-07-31 Johnson Electric S.A. Contact arrangement for high-power electrical switching devices
DE102012017157A1 (en) * 2012-08-30 2014-03-06 Hengstler Gmbh Relay with modified force-displacement characteristic
CN104995709A (en) 2012-11-05 2015-10-21 (株)旲桐 High load switch for vehicle
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JP6393025B2 (en) * 2013-07-01 2018-09-19 富士通コンポーネント株式会社 Electromagnetic relay
JP2015153564A (en) * 2014-02-13 2015-08-24 Ｎｅｃトーキン株式会社 electromagnetic relay
FR3018944A1 (en) 2014-03-21 2015-09-25 St Microelectronics Rousset MEMORY DEVICE ASSOCIATING A MEMORY PLAN OF THE SRAM TYPE AND A NON-VOLATILE TYPE MEMORY PLAN CURED AGAINST ACCIDENTAL TILT
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Also Published As

Publication number Publication date
PT1011122E (en) 2005-09-30
JP2000182456A (en) 2000-06-30
EP1575075A2 (en) 2005-09-14
US6362710B2 (en) 2002-03-26
EP1011122B1 (en) 2005-07-06
EP1575075A3 (en) 2008-09-10
DE19858755C1 (en) 2000-06-08
DK1011122T3 (en) 2005-08-01
ATE475982T1 (en) 2010-08-15
ES2347967T3 (en) 2010-11-26
DE59915189D1 (en) 2010-09-09
JP4265057B2 (en) 2009-05-20
ATE299290T1 (en) 2005-07-15
SI1575075T1 (en) 2010-11-30
ES2242347T3 (en) 2005-11-01
PT1575075E (en) 2010-09-08
SI1011122T1 (en) 2005-12-31
US6300854B1 (en) 2001-10-09
US20010054546A1 (en) 2001-12-27
EP1011122B8 (en) 2005-08-31
EP1011122A3 (en) 2001-04-25
DE59912238D1 (en) 2005-08-11
EP1011122A2 (en) 2000-06-21

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