EP1320113B1 - Contact element - Google Patents

Contact element Download PDF

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Publication number
EP1320113B1
EP1320113B1 EP02027856A EP02027856A EP1320113B1 EP 1320113 B1 EP1320113 B1 EP 1320113B1 EP 02027856 A EP02027856 A EP 02027856A EP 02027856 A EP02027856 A EP 02027856A EP 1320113 B1 EP1320113 B1 EP 1320113B1
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EP
European Patent Office
Prior art keywords
rivet
contact
dents
contact spring
riveting
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
EP02027856A
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German (de)
French (fr)
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EP1320113A3 (en
EP1320113A2 (en
Inventor
Roland Arand
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Europe AG
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Panasonic Electric Works Europe AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Electric Works Europe AG filed Critical Panasonic Electric Works Europe AG
Priority to SI200230714T priority Critical patent/SI1320113T1/en
Publication of EP1320113A2 publication Critical patent/EP1320113A2/en
Publication of EP1320113A3 publication Critical patent/EP1320113A3/en
Application granted granted Critical
Publication of EP1320113B1 publication Critical patent/EP1320113B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/06—Riveted connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
    • H01H11/041—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion
    • H01H11/042—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion by mechanical deformation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
    • H01H11/06—Fixing of contacts to carrier ; Fixing of contacts to insulating carrier

Definitions

  • an electrical switching contact is often realized via a provided with a contact metal spring.
  • the contact spring is moved mechanically or electrically via an actuator with a high switching frequency between the open and closed positions back and forth.
  • the contact piece is usually in a crowned or crown-shaped rivet, which is riveted in the outer region of the contact spring and is particularly good conductivity.
  • DE-A-30 09 567 discloses a tongue and a method of making the same having the features specified in the first part of claims 1 and 3.
  • the riveted joint should have a mechanical strength and low electrical contact resistance. Nevertheless, the resulting current heat should be dissipated as well as possible in the contact spring; Therefore, high thermal conductivity of the riveted joint is desired.
  • the object of the invention is to minimize material damage to the contact spring during the riveting process and still good mechanical, thermal and to ensure electrical connection between the contact rivet and contact spring.
  • the Nietst Zi is designed so that its end profile protrudes further in certain border areas than in its center. This difference in length should not be greater than the entire, protruding through the rivet hole length of the rivet shank.
  • Fig. 1 the free end of a contact spring 11 is shown with an actuating element 12 , which can be guided, for example, by a mechanical actuator.
  • actuating element 12 In the end region of the narrow contact spring 11 , a rivet hole 13 is punched, which has two round bulges 14 to the side edges of the contact spring 11 .
  • the extending through the two bulges 14 axis does not need to be completely perpendicular to the side edges of the contact spring 11 to stand; in certain cases, it is advantageous to align them slightly twisted.
  • a conventional, mushroom-shaped Kunststoffniet 15 is shown with a crowned top 16 and a cylindrical rivet shank 17 on its underside.
  • the rivet 17 is inserted through the rivet hole 13 to the stop with the top 16 of the contact rivet 15 .
  • contact spring 11 and contact rivet 15 are connected in a riveting operation by means of a punch 18 .
  • the punch 18 upsets the softer material of the rivet shank 17 so that a positive connection between the rivet 15 and contact spring 11 is formed.
  • the punch 18 does not have a flat front end, but is milled out like an arch, so that it has two longer edge portions 19 . In the riveting operation, therefore, only the areas of the rivet shank 17 located below these edge areas 19 are initially compressed and only thereafter, and correspondingly weaker, is the interior area.
  • the cross section of the punch 18 is circular and larger than that of the cylindrical rivet shank 17 .
  • Fig. 3 shows the free end of a finished contact element. It can be seen the greater compression of the rivet shank 17 in the edge regions 20 , which fully overlap the bulges 14 of the rivet hole 13 with material, thereby resulting in a positive connection of good conductivity.
  • the improvement of the mechanical, thermal and electrical connection properties is based primarily on the achieved by the bulges 14 larger surface contact between the contact spring 11 and rivet 15th
  • the special shape of the punch 18 causes a stronger compression of the rivet shank 17 in the corresponding edge regions and thus an accumulation of material in the bulges 14.
  • the above embodiment relates to the attachment of a contact rivet at the free end of a contact spring.
  • the invention is also applicable to comparable rivet joints, such as e.g. the rivet connection of the lower end of the contact spring with the connector about a relay, applicable.
  • non-circular Nietlochs 13 for example with three or more bulges 14 and correspondingly shaped rivet 18 are conceivable.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Contacts (AREA)
  • Bipolar Transistors (AREA)
  • Bipolar Integrated Circuits (AREA)
  • Semiconductor Memories (AREA)
  • Fuses (AREA)

Abstract

The relay contact element has a bearer element (11) and a contact rivet, whereby the rivet hole in the bearer element has lateral bulges (14) and the rivet shaft (17) is more compressed in defined edge regions than in its inner region. The rivet shaft is more compressed in its edge regions that are aligned with the bulges in the rivet hole. <??>AN Independent claim is also included for the following: a method of making an electrical contact between a contact rivet and a bearer element and a piston for use in the inventive method.

Description

In Relais wird ein elektrischer Schaltkontakt häufig über eine mit einem Kontaktstück versehene Metallfeder realisiert. Die Kontaktfeder wird mechanisch oder elektrisch über eine Betätigungseinrichtung mit hoher Schaltfrequenz zwischen offener und geschlossener Stellung hin und her bewegt.In relay, an electrical switching contact is often realized via a provided with a contact metal spring. The contact spring is moved mechanically or electrically via an actuator with a high switching frequency between the open and closed positions back and forth.

Das Kontaktstück besteht meist in einem balligen oder kronenförmigen Niet, der im äußeren Bereich der Kontaktfeder angenietet ist und besonders gut leitfähig ist.The contact piece is usually in a crowned or crown-shaped rivet, which is riveted in the outer region of the contact spring and is particularly good conductivity.

Zur Herstellung der Nietverbindung wird in die Kontaktfeder ein Loch gestanzt und der pilzförmige Kontaktniet hineingesteckt. Anschlie-Bend wird das durchgesteckte Ende des Nietschafts mit einem Nietstempel gestaucht, so daß eine formschlüssige Verbindung zwischen Niet und Kontaktfeder entsteht. Im Stand der Technik werden runde Nietlöcher und Stempel mit im wesentlichen flachem bzw. linsenkopfförmigem Ende verwendet.To produce the riveted connection, a hole is punched into the contact spring and the mushroom-shaped contact rivet is inserted. Connecting Bend the inserted end of the rivet shank is compressed with a riveting punch, so that a positive connection between the rivet and contact spring is formed. The prior art uses round rivet holes and punches with a substantially flat or lentil-shaped end.

Aus JP-A-01241722 ist ein Kontaktelement bekannt, bei dem das in einer Kontaktfeder vorgesehene Loch nach innen vorspringende Zacken aufweist, die sich beim Nietvorgang in den zylindrischen Nietschaft eindrücken.Out JP-A-01241722 a contact element is known in which the hole provided in a contact spring has inwardly projecting serrations which press into the cylindrical rivet shank during the riveting process.

DE-A-30 09 567 offenbart eine Schaltzunge und ein Verfahren zu deren Herstellung mit den im ersten Teil der Ansprüche 1 und 3 angegebenen Merkmalen. DE-A-30 09 567 discloses a tongue and a method of making the same having the features specified in the first part of claims 1 and 3.

Mit der fortschreitenden Miniaturisierung in der Relaistechnik sollen alle Bauteile eines Relais, darunter insbesondere die Kontaktfeder, möglichst klein und schmal gehalten werden. Dadurch wird der Abstand des Nietlochs zu den Seitenkanten der länglichen Kontaktfeder so klein, daß durch den Nietvorgang Materialverwerfungen in der Kontaktfeder auftreten können. Dies führt zu erhöhter Bruchgefahr, die es gerade für Sicherheitsrelais zu vermeiden gilt.With the progressive miniaturization in relay technology, all components of a relay, including in particular the contact spring, should be kept as small and narrow as possible. As a result, the distance of the rivet hole to the side edges of the elongated contact spring is so small that material distortions in the contact spring can occur due to the riveting operation. This leads to increased risk of breakage, which is precisely to avoid for safety relays.

Zusätzlich soll die Nietverbindung eine mechanische Belastbarkeit und geringen elektrischen Übergangswiderstand aufweisen. Dennoch entstehende Stromwärme soll möglichst gut in die Kontaktfeder abgeleitet werden; deshalb ist auch hohe thermische Leitfähigkeit der Nietverbindung erwünscht.In addition, the riveted joint should have a mechanical strength and low electrical contact resistance. Nevertheless, the resulting current heat should be dissipated as well as possible in the contact spring; Therefore, high thermal conductivity of the riveted joint is desired.

Aufgabe der Erfindung ist es, Materialschädigungen der Kontaktfeder beim Nietvorgang zu minimieren und trotzdem gute mechanische, thermische und elektrische Verbindung zwischen Kontaktniet und Kontaktfeder zu gewährleisten.The object of the invention is to minimize material damage to the contact spring during the riveting process and still good mechanical, thermal and to ensure electrical connection between the contact rivet and contact spring.

Die Lösung der Aufgabe gelingt mit dem in Anspruch 1 angegebenen Kontaktelement und dem in Anspruch 3 angegebenen Nietverfahren. Danach weist das Nietloch seitliche Ausbuchtungen auf, und der Nietschaft wird in seinen auf diese Ausbuchtungen ausgerichteten Randbereichen stärker gestaucht.The solution of the problem is achieved with the contact element specified in claim 1 and the riveting indicated in claim 3. Thereafter, the rivet hole on lateral bulges, and the rivet shank is more compressed in its aligned on these bulges edge areas.

Bei dieser Gestaltung sind die beim Nietvorgang im Trägerelement (Kontaktfeder) auftretenden Kräfte im Bereich der Ausbuchtungen abgeschwächt. Die teilweise stärkere Stauchung des Nietes gewährleistet wiederum die formschlüssige und gut leitende Verbindung zwischen Kontaktniet und Kontaktfeder.In this design, the forces occurring in the riveting process in the carrier element (contact spring) are weakened in the region of the bulges. The partially stronger compression of the rivet in turn ensures the positive and good conductive connection between the contact rivet and contact spring.

In der Weiterbildung der Erfindung nach Anspruch 2 und 4 werden Materialverwerfungen in den schmalen Stegen zwischen dem Nietloch und den Seitenkanten der Kontaktfeder vermieden. Dabei wird der Niet in den an die Ausbuchtungen angrenzenden Randbereichen stärker als in seinem Innenbereich gestaucht und so eine gute Verbindung erzielt.In the embodiment of the invention according to claim 2 and 4 material distortions are avoided in the narrow webs between the rivet hole and the side edges of the contact spring. In this case, the rivet is compressed more strongly in the edge regions adjacent to the bulges than in its inner region, thus achieving a good connection.

Der Nietstempel ist so gestaltet, daß sein Stirnprofil in bestimmten Randbereichen weiter vorragt ist als in seiner Mitte. Dieser Längenunterschied soll dabei nicht größer sein als die gesamte, durch das Nietloch hervorstehende Länge des Nietschafts.The Nietstempel is designed so that its end profile protrudes further in certain border areas than in its center. This difference in length should not be greater than the entire, protruding through the rivet hole length of the rivet shank.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung näher erläutert. Darin zeigt, jeweils in schematischer Perspektivansicht:

Fig. 1
einen Teil einer Kontaktfeder und einen davon getrennten Kontaktniet;
Fig. 2
Kontaktfeder, Kontaktniet und Stempel unmittelbar vor dem Nietvorgang; und
Fig. 3
das fertige Kontaktelement.
An embodiment of the invention will be explained below with reference to the drawing. It shows, in a schematic perspective view in each case:
Fig. 1
a part of a contact spring and a separate contact rivet;
Fig. 2
Contact spring, contact rivet and punch immediately before the riveting operation; and
Fig. 3
the finished contact element.

In Fig. 1 ist das freie Ende einer Kontaktfeder 11 mit einem Betätigungselement 12 gezeigt, das sich zum Beispiel von einem mechanischen Betätiger führen läßt. In den Endbereich der schmalen Kontaktfeder 11 ist ein Nietloch 13 gestanzt, das zu den Seitenkanten der Kontaktfeder 11 hin zwei runde Ausbuchtungen 14 aufweist.In Fig. 1 the free end of a contact spring 11 is shown with an actuating element 12 , which can be guided, for example, by a mechanical actuator. In the end region of the narrow contact spring 11 , a rivet hole 13 is punched, which has two round bulges 14 to the side edges of the contact spring 11 .

Die durch die beiden Ausbuchtungen 14 verlaufende Achse braucht nicht vollständig senkrecht zu den Seitenkanten der Kontaktfeder 11 zu stehen; in gewissen Fällen ist es vorteilhaft, sie leicht verdreht dazu auszurichten.The extending through the two bulges 14 axis does not need to be completely perpendicular to the side edges of the contact spring 11 to stand; in certain cases, it is advantageous to align them slightly twisted.

Unter der Kontaktfeder 11 ist ein herkömmlicher, pilzförmiger Kontaktniet 15 mit einer balligen Oberseite 16 und einem zylindrischen Nietschaft 17 an seiner Unterseite gezeigt.Under the contact spring 11 , a conventional, mushroom-shaped Kontaktniet 15 is shown with a crowned top 16 and a cylindrical rivet shank 17 on its underside.

Wie in Fig. 2 zu sehen, wird der Nietschaft 17 durch das Nietloch 13 bis zum Anschlag mit der Oberseite 16 des Kontaktniets 15 hindurchgesteckt. Anschließend werden Kontaktfeder 11 und Kontaktniet 15 in einem Nietvorgang mittels eines Stempels 18 verbunden. Dabei staucht der Stempel 18 das weichere Material des Nietschafts 17 so, daß eine formschlüssige Verbindung zwischen Niet 15 und Kontaktfeder 11 entsteht.As in Fig. 2 can be seen, the rivet 17 is inserted through the rivet hole 13 to the stop with the top 16 of the contact rivet 15 . Subsequently, contact spring 11 and contact rivet 15 are connected in a riveting operation by means of a punch 18 . The punch 18 upsets the softer material of the rivet shank 17 so that a positive connection between the rivet 15 and contact spring 11 is formed.

Der Stempel 18 weist dabei kein flaches Stirnende auf, sondern ist torbogenartig ausgefräst, so daß er zwei längere Randbereiche 19 aufweist. Beim Nietvorgang werden daher zunächst nur die unter diesen Randbereichen 19 befindlichen Bereiche des Nietschafts 17 gestaucht und erst danach und entsprechend schwächer der Innenbereich.The punch 18 does not have a flat front end, but is milled out like an arch, so that it has two longer edge portions 19 . In the riveting operation, therefore, only the areas of the rivet shank 17 located below these edge areas 19 are initially compressed and only thereafter, and correspondingly weaker, is the interior area.

Insgesamt ist der Querschnitt des Stempels 18 kreisförmig und größer als der des zylindrischen Nietschafts 17.Overall, the cross section of the punch 18 is circular and larger than that of the cylindrical rivet shank 17 .

Fig. 3 zeigt das freie Ende eines fertigen Kontaktelements. Man erkennt die stärkere Stauchung des Nietschafts 17 in den Randbereichen 20, die die Ausbuchtungen 14 des Nietlochs 13 voll mit Material überdecken und dadurch eine formschlüssige Verbindung guter Leitfähigkeit ergeben. Fig. 3 shows the free end of a finished contact element. It can be seen the greater compression of the rivet shank 17 in the edge regions 20 , which fully overlap the bulges 14 of the rivet hole 13 with material, thereby resulting in a positive connection of good conductivity.

Die Verbesserung der mechanischen, thermischen und elektrischen Verbindungseigenschaften beruht vor allem auf dem durch die Ausbuchtungen 14 erreichten größeren Oberflächenkontakt zwischen Kontaktfeder 11 und Niet 15. Die spezielle Form des Stempels 18 bewirkt eine stärkere Stauchung des Nietschafts 17 in den entsprechenden Randbereichen und damit eine Materialanhäufung in den Ausbuchtungen 14. The improvement of the mechanical, thermal and electrical connection properties is based primarily on the achieved by the bulges 14 larger surface contact between the contact spring 11 and rivet 15th The special shape of the punch 18 causes a stronger compression of the rivet shank 17 in the corresponding edge regions and thus an accumulation of material in the bulges 14.

Das obige Ausführungsbeispiel bezieht sich auf die Befestigung eines Kontaktniets am freien Ende einer Kontaktfeder. Die Erfindung ist auch bei vergleichbaren Nietverbindungen, wie z.B. der Nietverbindung des unteren Endes der Kontaktfeder mit dem Anschlußstück etwa eines Relais, anwendbar.The above embodiment relates to the attachment of a contact rivet at the free end of a contact spring. The invention is also applicable to comparable rivet joints, such as e.g. the rivet connection of the lower end of the contact spring with the connector about a relay, applicable.

Ebenso sind alternative Ausgestaltungen des unrunden Nietlochs 13, z.B. mit drei oder mehr Ausbuchtungen 14 und dazu entsprechend geformte Nietstempel 18 denkbar.Likewise, alternative embodiments of the non-circular Nietlochs 13 , for example with three or more bulges 14 and correspondingly shaped rivet 18 are conceivable.

Claims (4)

  1. A contact element comprising a carrier element (11) and a contact rivet (15), wherein the riveting hole (13) provided in the carrier element (11) comprises lateral dents (14), and the riveting bolt (17) is clenched stronger at certain border portions (20) than at its inner portion,
    characterised in that the riveting bolt (17) is clenched stronger at border portions (20) aligned with the dents (14) at the carrier element (11) than at the border portions which are not aligned with the dents (14).
  2. The contact element of claim 1, wherein dents (14) are provided at those locations of the riveting hole (13) which have the shortest distance to the side edges of the carrier element (11).
  3. A method for producing a connection between a contact rivet (15) and a carrier element (11), wherein a riveting hole (13) provided in the carrier element (11) comprises lateral dents (14), and the riveting bolt (17) is clenched stronger at certain border portions (20) than at its inner portion,
    characterised in that the riveting bolt (17) is clenched stronger at border portions (20) aligned with the dents (14) than at the border portions which are not aligned with the dents (14).
  4. The method of claim 3, wherein dents (14) are provided at those locations of the riveting hole (13) which have the shortest distance to the side edges of the carrier element (11).
EP02027856A 2001-12-13 2002-12-12 Contact element Expired - Lifetime EP1320113B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200230714T SI1320113T1 (en) 2001-12-13 2002-12-12 Contact element

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10161317A DE10161317A1 (en) 2001-12-13 2001-12-13 Relay contact element and method of manufacturing the same
DE10161317 2001-12-13

Publications (3)

Publication Number Publication Date
EP1320113A2 EP1320113A2 (en) 2003-06-18
EP1320113A3 EP1320113A3 (en) 2003-08-20
EP1320113B1 true EP1320113B1 (en) 2008-05-14

Family

ID=7709117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02027856A Expired - Lifetime EP1320113B1 (en) 2001-12-13 2002-12-12 Contact element

Country Status (4)

Country Link
EP (1) EP1320113B1 (en)
AT (1) ATE395713T1 (en)
DE (2) DE10161317A1 (en)
SI (1) SI1320113T1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8440504B2 (en) 2007-12-27 2013-05-14 Imec Method for aligning and bonding elements and a device comprising aligned and bonded elements

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2968691A (en) * 1957-04-09 1961-01-17 Earl L Canfield Electrical conductors and connectors therefor
DE2009168B1 (en) * 1970-02-27 1971-07-29 Licentia Electrically conductive riveted connection
DE3009567C2 (en) * 1980-03-13 1986-04-10 Ellenberger & Poensgen Gmbh, 8503 Altdorf Process for the production of switching tongues provided with double contact rivets for electrical switching devices
FR2488037A1 (en) * 1980-08-01 1982-02-05 Legrand Sa Contact blade mfg. process for leaf switch - uses square cross=section rivets cut from copper strip with silver edges for placing in holes of continuous leaf band
FR2496329A1 (en) * 1980-12-12 1982-06-18 Cit Alcatel Multilayer relay blade contact point mfg. process - uses riveting noble metal alloy wire sections in continuous band with contact formed by flattening pushed-back sections
DE3216135A1 (en) * 1982-04-30 1983-11-03 Inovan-Stroebe GmbH & Co KG, 7534 Birkenfeld CONTACT ELEMENT AND METHOD FOR THE PRODUCTION THEREOF
DE19741930A1 (en) * 1997-09-23 1999-04-08 Siemens Ag Contact profile band for relay or switching device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8440504B2 (en) 2007-12-27 2013-05-14 Imec Method for aligning and bonding elements and a device comprising aligned and bonded elements

Also Published As

Publication number Publication date
EP1320113A3 (en) 2003-08-20
ATE395713T1 (en) 2008-05-15
DE50212263D1 (en) 2008-06-26
DE10161317A1 (en) 2003-07-03
EP1320113A2 (en) 2003-06-18
SI1320113T1 (en) 2008-10-31

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