EP1391965B1 - Spring clamp terminal for electrical conductor - Google Patents

Spring clamp terminal for electrical conductor Download PDF

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Publication number
EP1391965B1
EP1391965B1 EP03018505A EP03018505A EP1391965B1 EP 1391965 B1 EP1391965 B1 EP 1391965B1 EP 03018505 A EP03018505 A EP 03018505A EP 03018505 A EP03018505 A EP 03018505A EP 1391965 B1 EP1391965 B1 EP 1391965B1
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EP
European Patent Office
Prior art keywords
clamping
piece
leaf spring
spring
conductor
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
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EP03018505A
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German (de)
French (fr)
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EP1391965A1 (en
Inventor
Hans-Josef Köllmann
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Wago Verwaltungs GmbH
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Wago Verwaltungs GmbH
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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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/48185—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar adapted for axial insertion of a wire end
    • H01R4/48275—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar adapted for axial insertion of a wire end with an opening in the housing for insertion of a release tool
    • 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/48185—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar adapted for axial insertion of a wire end
    • 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/4846—Busbar details
    • H01R4/4852—Means for improving the contact with the conductor, e.g. uneven wire-receiving surface
    • 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/4811—Spring details
    • H01R4/4816—Spring details the spring shape preventing insertion of the conductor end when the spring is unbiased
    • 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/484—Spring housing details
    • H01R4/4842—Spring housing details the spring housing being provided with a single opening for insertion of a spring-activating tool

Definitions

  • US 5,098,317 discloses a plug with spring clamp terminals for connecting electrical conductors to the plug.
  • a busbar piece is bent against the direction of insertion of the conductor end in the direction of aparsteckenden conductor and an opposite clamping leg end of the leaf spring, so that the bent end edge of the busbar piece together with the clamping leg end forms a nip.
  • the transverse edge can be arranged in different arrangement positions along extending in autism micrase extension of the hole collar, however, provides a very advantageous and manufacturing extremely low-cost embodiment of the invention that the transverse edge is formed by the in Porter micrase lower edge of the hole collar of the material passage to this purpose is presented against the electrical conductor to be clamped, which is either by a tilt arrangement of the busbar piece in total or z. B. by upsetting or pressing or molding of the associated hole collar wall area can be done.
  • a tin coating on the Lochkrageninnenwand Construction and in the region of the nip be protected against unwanted scraping.
  • the nip can still be solved well even if the nip is in the depth of the material passage.
  • Federkraftklemman Stammer
  • a busbar piece 10 with a square material passage 11 is shown in more detail in the figure in Fig. 2a (Longitudinal section) and Fig. 2b (Top view) is removable.
  • This in Fig. 2a and 2b shown piece of the busbar 10 also shows that such material passages can be positioned in any number closely adjacent to each other in a row.
  • the shape of a narrow strip of material can be selected, which has edge webs 12 with a small width in the region of the material passages.
  • the material passage 11 has an annularly closed hole collar 13 with the hole-collar inner wall surfaces 14 and 15 drawn through from the upper side of the conductor rail piece.
  • the transitions from the upper side of the conductor rail piece to the hole-collar inner wall surfaces may be formed as insertion or insertion chamfers 16 and 17.
  • the illustrated embodiment also realizes the formation of a so-called ladder leading pocket 24 (see Fig. 3 ). This arises from the fact that the unused and closed terminal point the end portion 25 of the clamping leg 20 is within the contour of the material passage, with an areal extent equal to or greater than the nominal cross-section of the conductor to be clamped 23 (see FIG. Fig. 3 ).
  • the all-round metal-terminated ladder front pocket 24 initially allows a force-free insertion of the leading end of the electrical conductor in the Vorfangtasche and then prevents unwanted evasive movements of the front end of the Conductor, if an axial force for inserting the conductor into the nip is manually applied (so-called plug-in connection).

Landscapes

  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Jigs For Machine Tools (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Clamps And Clips (AREA)
  • Installation Of Bus-Bars (AREA)
  • Suspension Of Electric Lines Or Cables (AREA)

Description

Die Erfindung betrifft einen elektrischen Federkraftklemmanschluß gemäß den Merkmalen des Oberbegriffs des Anspruches 1.The invention relates to an electrical spring terminal connection according to the features of the preamble of claim 1.

Ein wesentliches Gattungsmerkmal solcher Federkraftklemmanschlüsse ist ein viereckiger Materialdurchzug durch das aus einem flachen Material gefertigte Stromschienenstück, der als Leiterdurchstecköffnung dient und der einen in die Leiterdurchsteckrichtung sich erstreckenden Lochkragen besitzt, so daß zwischen der Lochkrageninnenwandfläche und einem in den Materialdurchzug sich hineinerstreckenden Ende einer Blattfeder eine Klemmstelle für einen elektrischen Leiter gebildet ist (siehe DE 28 25 291 C2 ).An essential feature of such Federkraftklemmanschlüsse is a quadrangular material passage through the made of a flat material conductor rail piece, which serves as Leiterdurchstecköffnung and has a in the Leiterdurchsteckrichtung extending hole collar, so that between the Lochkrageninnenwandfläche and a hineingstreckendes in the material passage end of a leaf spring a nip For an electrical conductor is formed (see DE 28 25 291 C2 ).

Solche Stromschienenstücke können mit einem, aber auch mit mehreren Materialdurchzügen versehen sein, die bevorzugt in einer Linie angeordnet sind, um eine möglichst schmale Bauform des Stromschienenstücks ( z. B. in Art eines ausgestanzten Materialstreifens) zu erhalten, wie dies z.B. für die Durchgangsstromschienen eng benachbarter Reihenklemmenanordnungen verlangt wird. Solche besonders schmalen Stromschienenstücke besitzen im Bereich der Materialdurchzüge lediglich schmale, in Stromschienenrichtung verlaufende Randstege, deren Stromleitungsquerschnitte im Regelfall nicht ausreichend sind. Dieser Nachteil wird durch die Lochkragen der Materialdurchzüge ausgeglichen, deren Lochkragenquerschnitte zugleich auch Stromleitungsquerschnitte sind, so daß in der Summe die Querschnitte der Randstege und die Lochkragenquerschnitte einen genügend großen Stromleitungsquerschnitt in Richtung des Stromschienenstücks zur Verfügung stellen.Such busbar pieces may be provided with one or several material passages, which are preferably arranged in a line in order to obtain as narrow as possible a construction of the conductor rail piece (eg in the manner of a punched out material strip), as e.g. is required for the through busbars of closely adjacent terminal block assemblies. In the region of the material passages, such particularly narrow conductor rail pieces have only narrow edge webs extending in the direction of the busbars, whose current conductor cross sections are generally insufficient. This disadvantage is compensated by the hole collar of the material passages whose hole collar cross sections are at the same time also power line cross sections, so that in total the cross sections of the edge webs and the hole collar cross sections provide a sufficiently large power line cross section in the direction of the busbar piece available.

Jedoch, die bekannten Federkraftklemmanschlüsse dieser Art haben den Nachteil, daß die Stromübergangswerte zwischen der Lochkrageninnenwandfläche und dem geklemmten elektrischen Leiter nur schwach ausreichend sind. Praktische Versuche, dieses Problem durch eine Erhöhung der Klemmkräfte der Blattfeder zu lösen, waren unbefriedigend, da höhere Klemmkräfte die manuell aufzubringenden Einsteckkräfte für die Klemmung des elektrischen Leiters ungünstig beeinflussen.However, the known spring terminal connections of this type have the disadvantage that the current transfer values between the hole collar inner wall surface and the clamped electrical conductor are only weakly sufficient. Practical attempts to solve this problem by increasing the clamping forces of the leaf spring were unsatisfactory because higher clamping forces the manually applied clamping insertion forces of the electrical conductor unfavorably influence.

US 5,098,317 offenbart einen Stecker mit Federkraftklemmanschlüssen zum Anschließen elektrischer Leiter an den Stecker. Ein Stromschienenstück ist entgegen der Einsteckrichtung des Leiterendes in Richtung des einzusteckenden Leiters und eines gegenüberliegenden Klemmschenkelendes an der Blattfeder umgebogen, so dass die umgebogene Endkante des Stromschienenstücks zusammen mit dem Klemmschenkelende eine Klemmstelle bildet. US 5,098,317 discloses a plug with spring clamp terminals for connecting electrical conductors to the plug. A busbar piece is bent against the direction of insertion of the conductor end in the direction of einzusteckenden conductor and an opposite clamping leg end of the leaf spring, so that the bent end edge of the busbar piece together with the clamping leg end forms a nip.

US 5,348,496 offenbart einen Lösemechanismus für einen Federkraftklemmanschluss. Der Federkraftklemmanschluss ist aus einer gradlinig verlaufenden Stromschiene und einer Blattfeder gebildet, dessen Klemmschenkelende sich schräg in Richtung der Ebene des Stromschienenstücks erstreckt. Ein anzuklemmender Leiter liegt flächig an der Anlageebene des Stromschienenstücks an. US 5,348,496 discloses a release mechanism for a spring force clamp connection. The spring force terminal connection is formed from a rectilinear bus bar and a leaf spring whose clamping leg end extends obliquely in the direction of the plane of the bus bar section. A conductor to be clamped lies flat against the contact surface of the busbar section.

EP 1 217 692 A2 offenbart eine Anschlussklemme für einen elektrischen Leiter mit einem Stromschienenstück, dessen an eine Stecköffnung angrenzende Profilabschnitt in Richtung eines in die Stecköffnung einzusteckenden Leiters abgebogen ist. Das von der Stecköffnung entfernte Ende des abgewinkelten Profilabschnitts bildet zusammen mit einem Klemmschenkelende einer in die Stecköffnung eingesetzten Blattfeder eine definierte Klemmstelle, die eine hohe Kontaktsicherheit gewährleistet. EP 1 217 692 A2 discloses a terminal for an electrical conductor with a busbar piece, which is bent to a plug-in opening profile section in the direction of a plugged into the plug opening conductor. The remote from the insertion opening end of the angled profile section, together with a clamping leg end of a leaf spring inserted into the insertion opening a defined nip, which ensures a high contact reliability.

Die Aufgabe der Erfindung bestand deshalb darin, die gattungsgemäßen Vorteile eines Federkraftklemmanschlusses, der in seiner Stromschiene einen Materialdurchzug mit einem Lochkragen mit ringförmig geschlossenen Lochkrageninnenwandflächen besitzt, beizubehalten, jedoch die Stromübergangswerte in der Klemmstelle zu verbessern, ohne dabei die Leitereinsteckkräfte zu erhöhen oder in anderer Weise den Leitereinsteckvorgang zu verschlechtern.The object of the invention was therefore to maintain the generic advantages of a spring terminal connection, which has in its bus bar a material passage with a hole collar with annularly closed Lochkrageninnenwandflächen, but to improve the current transfer values in the terminal point, without increasing the Leitereinsteckkräfte or otherwise to degrade the ladder insertion process.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass an der Lochkrageninnenwandfläche, die mit dem Klemmschenkelende einer Blattfeder die Klemmstelle bildet, eine gegen den elektrischen Leiter vorstehende und quer zur Leiterdurchsteckrichtung sich erstreckende Querkante vorhanden ist und dass der Klemmschenkel der Blattfeder derart bemessen und geformt ist, dass die endseitige Klemmkante des Klemmschenkelendes in der Position der Klemmung des elektrischen Leiters in etwa der an der Lochkrageninnenwandfläche vorhandenen Querkante gegenüberliegt.This object is achieved in that at the Lochkrageninnenwandfläche which forms the nip with the clamping leg end of a leaf spring, a projecting against the electrical conductor and transverse to Leiterdurchsteckrichtung extending transverse edge is present and that the clamping leg of the leaf spring is sized and shaped such that the end-side clamping edge of the clamping leg end in the position of the clamping of the electrical conductor is approximately opposite to the transverse edge present on the inner wall of the perforated collar.

Dabei kann die Querkante in verschiedenen Anordnungspositionen entlang der in Leiterdurchsteckrichtung verlaufenden Erstreckung des Lochkragens angeordnet sein, jedoch sieht eine sehr vorteilhafte und fertigungstechnisch äußert kostengünstige Ausführungsform der Erfindung vor, dass die Querkante durch die in Leiterdurchsteckrichtung untere Randkante des Lochkragens des Materialdurchzugs gebildet ist, die zu diesem Zweck gegen den zu klemmenden elektrischen Leiter vorgestellt ist, was entweder durch eine Neigungsanordnung des Stromschienenstücks insgesamt oder z. B. durch Anstauchen oder Drücken oder Formpressen des zugeordneten Lochkragenwandbereichs erfolgen kann.In this case, the transverse edge can be arranged in different arrangement positions along extending in Leiterdurchsteckrichtung extension of the hole collar, however, provides a very advantageous and manufacturing extremely low-cost embodiment of the invention that the transverse edge is formed by the in Leiterdurchsteckrichtung lower edge of the hole collar of the material passage to this purpose is presented against the electrical conductor to be clamped, which is either by a tilt arrangement of the busbar piece in total or z. B. by upsetting or pressing or molding of the associated hole collar wall area can be done.

Die anderen Lochkragenwandbereiche, die zur Bildung der Klemmstelle nichts beitragen, sind von dieser Maßnahme nicht betroffen, können jedoch gleichfalls verformt sein, wenn dies die fertigungstechnischen Arbeitsabläufe bei der Herstellung und Formung des Materialdurchzugs und des Lochkragens erleichtern sollte.The other hole collar wall portions, which do not contribute to the formation of the nip, are not affected by this measure, but may also be deformed if this should facilitate the manufacturing operations in the manufacture and formation of the material passage and the hole collar.

Die erfindungsgemäße Lösung ist für Federkraftklemmanschlüsse, die in ihrem Stromschienenstück einen Materialdurchzug mit einem Lochkragen aufweisen, neu und verbessert die Stromübergänge und die Kontaktsicherheit in der Klemmstelle ganz erheblich. Dies ergibt sich zum einen aus dem Vorteil der Bildung eines Kontaktpunktes, der sich als Kreuzungspunkt zwischen dem elektrischen Leiter und der vorstehenden Querkante an der Lochkrageninnenwandfläche darstellt und der geometrisch die Kontaktanlagefläche zwischen dem elektrischen Leiter und dem Lochkragen des Materialdurchzugs auf eine kleinere definierte Kontaktanlagefläche minimiert, in Kombination mit einer maximal möglichen Kontaktkraftaufbringung, die sich daraus ergibt, daß der Klemmschenkel der Klemmfeder derart bemessen und geformt ist, daß die endseitige Klemmkante des Klemmschenkelendes in der Position der Klemmung des elektrischen Leiters nahezu direkt auf die geometrisch minimierte Kontaktanlagefläche einwirkt, indem die Klemmkante des Klemmschenkelendes in etwa der an der Lochkrageninnenwandfläche gebildeten Querkante gegenüberliegt. Daraus resultiert eine hohe spezifische Flächenpressung in der Kontaktanlagefläche, die die Stromübergänge verbessert und zudem einen gasdichten Kontakt gewährleistet.The solution according to the invention is novel for spring terminal connections which have a material passage with a hole collar in their busbar section, and considerably improves the current transitions and the contact reliability in the terminal point. This results, on the one hand, from the advantage of the formation of a contact point which presents itself as a crossing point between the electrical conductor and the projecting transverse edge on the inner wall of the perforated collar and which geometrically minimizes the contact contact surface between the electrical conductor and the hole collar of the material passage to a smaller defined contact bearing surface, in combination with a maximum possible contact force application, which results from the fact that the clamping leg of the clamping spring is dimensioned and shaped such that the end-side clamping edge of the clamping leg end in the position of the clamping of the electrical conductor acts almost directly on the geometrically minimized contact bearing surface, in that the clamping edge of the clamping leg end lies approximately opposite the transverse edge formed on the inner wall of the perforated collar. This results in a high specific surface pressure in the contact surface, which improves the current transitions and also ensures a gas-tight contact.

Die Positionierung des Klemmschenkelendes der Blattfeder in etwa gegenüberliegend der Querkante an der Lochkrageninnenwandfläche hat den weiteren Vorteil, daß auf den geklemmten elektrischen Leiter keine aus der Klemmkraft der Blattfeder resultierenden Kippmomente ausgeübt werden.The positioning of the clamping leg end of the leaf spring approximately opposite the transverse edge on the hole collar inner wall surface has the further advantage that no tilting moments resulting from the clamping force of the leaf spring are exerted on the clamped electrical conductors.

Ist in bevorzugter Weise die "vorstehende Querkante" an der Lochkrageninnenwandfläche durch die "vorgestellte untere Randkante" des Lochkragens des Materialdurchzugs gebildet, dann verlagert sich die Klemmstelle für den elektrischen Leiter maximal in die Tiefe des Materialdurchzugs hinein, woraus sich weitere erhebliche Vorteile ergeben.Is preferably the "protruding transverse edge" formed on the Lochkrageninnenwandfläche by the "imagined lower peripheral edge" of the hole collar of the material passage, then the clamping point for the electrical conductor displaced maximally in the depth of the material passage, resulting in further significant advantages.

So kann gemäß Anspruch 3 der Bereich der Lochkrageninnenwandfläche, der in Leitersteckrichtung der Klemmstelle vorgelagert ist, als relativ große und mit weichen Übergängen stoßfrei geformte (vorzugsweise plan geformte) Schrägfläche ausgebildet sein, die beim Einsteckvorgang das vorlaufende Ende des elektrischen Leiters weich und gleitend (d.h. ohne "hart" stoßende Übergänge) führt, so daß die Leitereinsteckkräfte verringert sind und ggf. vorhandene Oberflächenbeschichtungen, wie z. B. eine Zinnbeschichtung an der Lochkrageninnenwandfläche und im Bereich der Klemmstelle, gegen unerwünschte Abschabungen geschont werden.Thus, according to claim 3, the region of the hole collar inner wall surface, which is upstream in Leitersteckrichtung the nip, as a relatively large and soft transitions bump-free formed (preferably plan shaped) be formed oblique surface during insertion the leading end of the electrical conductor soft and sliding (ie without "hard" abutting transitions) leads, so that the conductor insertion forces are reduced and possibly existing surface coatings, such. As a tin coating on the Lochkrageninnenwandfläche and in the region of the nip, be protected against unwanted scraping.

Vorteilhaft ist es, für Federkraftklemmanschlüsse dieser Art eine Leiter-Vorfangtasche zu schaffen, damit auch mehrdrähtige elektrische Leiter problemlos gesteckt werden können, ohne dass sie aufspleißen und/oder sonst wie ausweichen können. Dies wird gemäß Anspruch 5 dadurch gelöst, dass sich bei unbelegter und geschlossener Klemmstelle ein endseitiges Teilstück des Klemmschenkels der Blattfeder innerhalb der Kontur des Materialdurchzugs befindet (d.h. in der Tiefe des Materialdurchzugs positioniert ist), und zwar mit einer Flächenstreckung des Teilstücks, die gleich oder größer als der Nennquerschnitt des zu klemmenden Leiters ist derart, dass die ringförmig geschlossenen Lochkrageninnenwandflächen mit dem endseitigen Teilstück des Klemmschenkels eine allseits metallgefasste Leiter-Vorfangtasche für das vorlaufende Ende des einzusteckenden elektrischen Leiters bilden.It is advantageous to create a ladder front pocket for spring clamps of this type, so that multi-wire electrical conductors can be plugged easily without them splitting and / or otherwise can escape. This is achieved according to claim 5, characterized in that in unoccupied and closed nip an end portion of the clamping leg of the leaf spring is within the contour of the material passage (ie, is positioned in the depth of the material passage), with a surface extension of the section, the same or greater than the nominal cross-section of the conductor to be clamped is such that the annularly closed Lochkrageninnenwandflächen with the end-side portion of the clamping leg form a metal-summarized ladder-Vorfangtasche for the leading end of the electrical conductor einzusteckenden.

Für die geometrische Form der vorgenannten Leiter-Vorfangtasche ist es zweckmäßig, das endseitige Teilstück des Klemmschenkels der Blattfeder möglichst flachliegend innerhalb der Lochkragenkontur anzuordnen, so dass sich eine möglichst stumpfe Anlage der Stirnseite des Klemmschenkelendes gegen die Oberfläche des elektrischen Leiters ergibt, wodurch beim Auftreten von Leiterabzugskräften eine scharfkantige Leiterklemmung vermieden ist und auch empfindlichere feindrähtige elektrische Leiter beschädigungsfrei geklemmt werden können.For the geometric shape of the aforementioned ladder-Vorfangtasche it is expedient to arrange the end-side portion of the clamping leg of the leaf spring as flat as possible lying within the hole collar contour, so that a possible blunt investment of the end face of the clamping leg end results against the surface of the electrical conductor, whereby the occurrence of Leiterabzugskräften a sharp-edged conductor clamp is avoided and even sensitive fine-stranded electrical conductors can be clamped without damage.

Die Leiter-Vorfangtasche als solche bündelt mehrdrähtige Leiter und hat für alle Arten von elektrischen Leitern den Vorteil, dass bei einem Steckanschluss das vordere Ende des elektrischen Leiters zunächst kraftfrei in die Leiter-Vorfangtasche einzustecken ist und infolgedessen gegen Ausweichbewegungen fixiert ist, bevor mittels einer manuell auf den Leiter ausgebrachten Axialkraft das Öffnen der Klemmstelle eingeleitet wird.The ladder front pocket as such bundles stranded conductors and has the advantage for all types of electrical conductors that at a plug-in connection the front end of the electrical conductor is first force-free to insert into the ladder front pocket and is consequently fixed against evasive movements before by means of a manual axial force applied to the conductor, the opening of the nip is initiated.

Mit der Ausführungsform gemäß Anspruch 6 kann die Klemmstelle auch dann noch gut gelöst werden, wenn sich die Klemmstelle in der Tiefe des Materialdurchzugs befindet. Bei Federkraftklemmanschlüssen der gattungsgemäßen Art ist es immer ein Problem, zum Öffnen der Klemmstelle den Klemmschenkel der Blattfeder so weit zurückdrücken zu können, dass die Klemmstelle optimal, d. h. vollständig geöffnet ist. Insbesondere gilt das dann, wenn aufgrund einer kompakten Verdrahtungssituation die Notwendigkeit besteht, dass das Werkzeug (Schraubendreher) nur axial vorgeschoben werden kann, um die Klemmstelle zu öffnen.With the embodiment according to claim 6, the nip can still be solved well even if the nip is in the depth of the material passage. In Federkraftklemmanschlüssen the generic type, it is always a problem to be able to push back the clamping leg of the leaf spring so far to open the nip that the nip optimally, d. H. is completely open. In particular, this applies when, due to a compact wiring situation, the necessity exists that the tool (screwdriver) can only be advanced axially in order to open the clamping point.

Dieses Problem wird gemäß Anspruch 6 dadurch gelöst, dass ein außerhalb der Kontur des Materialdurchzugs liegendes Teilstück des Klemmschenkels der Blattfeder eine Vorwölbung in Richtung der Federklemmkraft des Klemmschenkels aufweist derart, daß ein an dieser Vorwölbung und im wesentlichen senkrecht zur Oberfläche des Stromschienenstücks angesetztes Drückwerkzeug den Klemmschenkel bis in eine Position zurückdrückt, in der die Klemmstelle vollständig geöffnet ist.This problem is solved according to claim 6, characterized in that a lying outside the contour of the material passage portion of the clamping leg of the leaf spring a protrusion in the direction of the spring clamping force of the clamping leg has such that an attached to this protrusion and substantially perpendicular to the surface of the busbar piece pressing tool pushes the clamping leg back to a position in which the clamping point is fully open.

Grundsätzlich ist darauf hinzuweisen, daß ein nach der Lehre der Erfindung konzipierter Federkraftklemmanschluß sowohl in der Bauart mit einer spiegelbildlich ausgeführten Blattfeder für zwei in einem Stromschienenstück benachbart angeordnete Materialdurchzüge verwirklicht werden kann (siehe hierzu die Bauart in DE 28 25 291 C2 ) als auch in einer Bauart mit einer Blattfeder, die einen Anlageoder Halteschenkel besitzt, der in beliebiger Weise an dem Stromschienenstück festgelegt sein kann (z.B. durch Vernieten oder Verpressen), oder es wird eine Bauart gewählt, bei der die Blattfeder gemäß Anspruch 4 der vorliegenden Anmeldung U-förmig gebogen ist und an ihrem dem Klemmschenkel entgegengesetzten Ende einen Anlageschenkel besitzt, der sich mit dem Klemmschenkel der Blattfeder in denselben Materialdurchzug des Stromschienenstücks hineinerstreckt und der an der Lochkrageninnenwandfläche anliegt, die der Lochkrageninnenwandfläche, die die Klemmstelle bildet, gegenüberliegt.Basically, it should be noted that a designed according to the teachings of the invention spring terminal connection both in the design with a mirror-image designed leaf spring for two adjacent in a busbar piece material passages can be realized (see the design in DE 28 25 291 C2 ) as well as in a design with a leaf spring having a plant or holding leg which can be fixed in any manner on the busbar piece (eg by riveting or pressing), or it is selected a type in which the leaf spring according to claim 4 of the present Application is bent in a U-shape and at its end opposite the clamping leg has a plant leg, which hineinerstreckt with the clamping leg of the leaf spring in the same material passage of the busbar piece and which abuts the Lochkrageninnenwandfläche opposite to the Lochkrageninnenwandfläche forming the nip.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnungen näher beschrieben. Es zeigen:

Fig. 1 und Fig. 2a + 2b
einen Federkraftklemmanschluß gemäß der Erfindung,
Fig. 3, 4, 5
Funktionsabläufe des Federkraftklemmanschlusses nach Fig. 1 bei Verwendung als Steckanschluß,
Fig. 6
den Federkraftklemmanschluß nach Fig. 1 beim Öffnen der Klemmstelle.
Hereinafter, an embodiment of the invention will be described in more detail with reference to the drawings. Show it:
Fig. 1 and Fig. 2a + 2b
a spring terminal connection according to the invention,
Fig. 3, 4, 5
Functional sequences of the spring terminal connection after Fig. 1 when used as a plug connection,
Fig. 6
the spring force terminal connection Fig. 1 when opening the nip.

Dargestellt ist (siehe Fig. 1) ein Stromschienenstück 10 mit einem viereckigen Materialdurchzug 11, wie dieser genauer aus der Abbildung in Fig. 2a (Längsschnitt) und Fig. 2b ( Draufsicht) entnehmbar ist. Das in Fig. 2a und 2b dargestellte Stück der Stromschiene 10 zeigt auch, daß solche Materialdurchzüge in beliebiger Anzahl eng benachbart zueinander in einer Reihe positioniert werden können. Für die Stromschiene kann die Form eines schmalen Materialstreifens gewählt werden, der im Bereich der Materialdurchzüge Randstege 12 mit einer geringen Breite aufweist.Is shown (see Fig. 1 ) a busbar piece 10 with a square material passage 11, as shown in more detail in the figure in Fig. 2a (Longitudinal section) and Fig. 2b (Top view) is removable. This in Fig. 2a and 2b shown piece of the busbar 10 also shows that such material passages can be positioned in any number closely adjacent to each other in a row. For the busbar, the shape of a narrow strip of material can be selected, which has edge webs 12 with a small width in the region of the material passages.

Der Materialdurchzug 11 besitzt einen von der Oberseite des Stromschienenstücks durchgezogenen, ringförmig geschlossenen Lochkragen 13 mit den Lochkrageninnenwandflächen 14 und 15. Die Übergänge von der Oberseite des Stromschienenstücks auf die Lochkrageninnenwandflächen können als Einführungsrundungen oder Einführungsschrägen 16 und 17 ausgebildet sein.The material passage 11 has an annularly closed hole collar 13 with the hole-collar inner wall surfaces 14 and 15 drawn through from the upper side of the conductor rail piece. The transitions from the upper side of the conductor rail piece to the hole-collar inner wall surfaces may be formed as insertion or insertion chamfers 16 and 17.

In dem Materialdurchzug ist eine im wesentlichen U-förmig gebogene Blattfeder eingesetzt, die bei dem dargestellten Ausführungsbeispiel mit ihrem rückwärtigen Federbogen auf einem Kunststoffdorn 18 eines Isolierstoffgehäuses, in den solche Federkraftklemmanschlüsse eingebaut werden können, aufsitzt und dadurch zusätzlich lagefixiert ist. Die Blattfederbreite entspricht zumindest im Bereich des in dem Materialdurchzug sich hineinerstreckenden Anlageschenkels 19 und des in den Materialdurchzug eintauchenden Klemmschenkels 20 der Breite des viereckigen Durchzugs. Statt der zusätzlichen Lagefixierung durch den Kunststoffdorn 18 können z.B. auch andere Hilfsmittel, wie an der Oberseite des Stromschienenstücks anliegende Anschlagschultern des Anlageschenkels 19 und/oder z.B. ein Preßsitz des Anlageschenkels in dem Materialdurchzug zur zusätzlichen Lagefixierung der Blattfeder dienen. Jedoch kann in vielen Anwendungsfällen eine solche zusätzliche Lagefixierung der Blattfeder auch ganz entfallen, da die Vorspannung der U-förmigen Blattfeder auch eine Selbsthaltung der Blattfeder in dem Materialdurchzug gewährleistet.In the material passage a substantially U-shaped bent leaf spring is used, which in the illustrated embodiment, with its rear spring bow on a plastic mandrel 18 of an insulating material, in which such Federkraftklemmanschlüsse can be installed, and thus additionally fixed in position. The leaf spring width corresponds at least in the region of the plant leg 19 extending into the material passage and the clamping leg 20 dipping into the material passage to the width of the quadrilateral passage. Instead of the additional position fixing by the plastic mandrel 18, e.g. also other aids, such as abutting the top of the busbar stop shoulders of the support leg 19 and / or e.g. serve a press fit of the abutment leg in the material passage for additional positional fixation of the leaf spring. However, in many cases, such an additional positional fixation of the leaf spring can also be dispensed with altogether, since the prestressing of the U-shaped leaf spring also ensures that the leaf spring remains in the material passage.

Die endseitige Klemmkante 21 des Klemmschenkels 20 liegt bei unbelegter und geschlossener Klemmstelle an der Lochkrageninnenwandfläche 15 an und ist somit in dem Materialdurchzug anschlag-fixiert gehalten.The terminal clamping edge 21 of the clamping leg 20 is at unoccupied and closed nip at the hole collar inner wall surface 15 and is thus held stop-fixed in the material passage.

Gemäß der Lehre der Erfindung ist an der Lochkrageninnenwandfläche 15 eine gegen den elektrischen Leiter, d.h. in Richtung des Zentrums des Materialdurchzugs vorstehende und quer zur Leiterdurchsteckrichtung durch den Materialdurchzug sich erstreckende Querkante ausgebildet, die bei dem dargestellten Ausführungsbeispiel durch die untere Randkante 22 des Lochkragens 13 gebildet ist, die zu diesem Zweck in Richtung des Zentrums des Materialdurchzugs vorgestellt ist.According to the teachings of the invention, at the hole collar inner wall surface 15, a projecting against the electrical conductor, ie in the direction of the center of the material passage and transversely to the Leiterdurchsteckrichtung formed by the material passage extending transverse edge, which is formed in the illustrated embodiment by the lower peripheral edge 22 of the hole collar 13, which is presented for this purpose in the direction of the center of the material passage.

Weiterhin ist gemäß der Lehre der Erfindung der Klemmschenkel 20 der Blattfeder derart bemessen und geformt, daß er in der Position der Klemmung des elektrischen Leiters 23 (siehe hierzu Fig. 5) maximal in die Tiefe des Materialdurchzugs eintaucht, wodurch seine endseitige Klemmkante 21 bei der Klemmung des elektrischen Leiters in etwa der unteren Randkante 22 des Lochkragens gegenüberliegt, so daß der elektrische Leiter 23 frei von Kippmomenten in der Klemmstelle 21/22 geklemmt ist.Furthermore, according to the teachings of the invention, the clamping leg 20 of the leaf spring is sized and shaped so that it in the position of clamping the electrical conductor 23 (see Fig. 5 ) immersed maximally in the depth of the material passage, whereby its terminal clamping edge 21 is located in the clamping of the electrical conductor in approximately the lower peripheral edge 22 of the hole collar, so that the electrical conductor 23 is clamped free of tilting moments in the nip 21/22.

Das dargestellte Ausführungsbeispiel realisiert auch die Bildung einer sogenannten Leiter-Vorfangtasche 24 (siehe hierzu Fig. 3). Diese entsteht dadurch, daß sich bei unbelegter und geschlossener Klemmstelle das endseitige Teilstück 25 des Klemmschenkels 20 innerhalb der Kontur des Materialdurchzugs befindet, und zwar mit einer Flächenerstreckung, die gleich oder größer als der Nennquerschnitt des zu klemmenden Leiters 23 ist (vergl. Fig. 3). Die allseitig metallgefaßte Leiter-Vorfangtasche 24 erlaubt zunächst ein kraftfreies Einstecken des vorlaufenden Endes des elektrischen Leiters in die Vorfangtasche und verhindert sodann unerwünschte Ausweichbewegungen des vorderen Endes des Leiters, wenn auf diesen manuell eine Axialkraft zum Einstecken des Leiters in die Klemmstelle aufgebracht wird (sogenannter Steckanschluß).The illustrated embodiment also realizes the formation of a so-called ladder leading pocket 24 (see Fig. 3 ). This arises from the fact that the unused and closed terminal point the end portion 25 of the clamping leg 20 is within the contour of the material passage, with an areal extent equal to or greater than the nominal cross-section of the conductor to be clamped 23 (see FIG. Fig. 3 ). The all-round metal-terminated ladder front pocket 24 initially allows a force-free insertion of the leading end of the electrical conductor in the Vorfangtasche and then prevents unwanted evasive movements of the front end of the Conductor, if an axial force for inserting the conductor into the nip is manually applied (so-called plug-in connection).

Den Funktionsablauf beim Einstecken des elektrischen Leiters in die Klemmstelle demonstrieren die Fig. 4 und 5, wobei die Formgebung der Lochkrageninnenwandfläche 15 als stoßfrei und plan ausgebildete Schrägfläche die für den Steckanschluß auf den elektrischen Leiter aufzubringende Axialkraft verringert.The functional sequence when inserting the electrical conductor in the terminal point demonstrate the Fig. 4 and 5 , Wherein the shape of the hole collar inner wall surface 15 as a smooth and plan formed inclined surface reduces the applied for the plug-in connection to the electrical conductor axial force.

Das dargestellte Ausführungsbeispiel eines erfindungsgemäßen Federkraftklemmanschlusses berücksichtigt auch, daß gefordert ist, Federkraftklemmanschlüsse dieser Art ebenfalls für nicht-steckbare elektrische Leiter (z.B. für feindrähtige flexible Leiter) verwenden zu können und/ oder einen geklemmten elektrischen Leiter wieder aus der Klemmstelle lösen zu können. Zu diesem Zweck besitzt der Klemmschenkel 20 der Blattfeder eine Vorwölbung 26 (vergl. Fig. 5), die außerhalb der Kontur des Materialdurchzugs angeordnet ist derart, daß ein an dieser Vorwölbung und im wesentlichen senkrecht zur Oberseite des Stromschienenstücks angesetztes Drückwerkzeug 27 den Klemmschenkel bis in eine Position zurückdrückt, in der die Klemmstelle vollständig geöffnet ist (siehe Fig. 6).The illustrated embodiment of a spring terminal connection according to the invention also takes into account that it is also required to use spring terminal connections of this type for non-pluggable electrical conductors (eg for fine-wire flexible conductors) and / or to be able to release a clamped electrical conductor from the terminal point. For this purpose, the clamping leg 20 of the leaf spring has a protrusion 26 (see FIG. Fig. 5 ), which is arranged outside the contour of the material passage such that an attached to this bulge and substantially perpendicular to the top of the busbar piece pressing tool 27 pushes the clamping leg back into a position in which the clamping point is fully open (see Fig. 6 ).

Claims (6)

  1. A Spring-force clamp connector with a conductive core piece (10) and a leaf spring for connecting an electrical conductor (23),
    - the conductive core piece (10) is manufactured from a flat material and has an opening for through-passage of the conductor in the shape of four-cornered material passage (11), which has an aperture collar (13) extending in the direction of the conductor through-passage and comprising an annular, closed inner wall area (14, 15) of the aperture collar (13)
    - the leaf spring has a clamping piece (20), whose end is inserted into the material passage (11) such that it forms a inner wall area (15) of the aperture collar of the material passage (11) a clamping site for the electrical conductor (23),
    characterized in,
    - that the inner wall area (15) of the aperture collar, which forms the clamping site together with the end of the clamping piece, a cross edge (22) is present which projects against the electrical conductor (23) and extends crosswise to the direction of the conductor through-passage,
    - and that the clamping piece (20) of the leaf spring is dimensioned and shaped such that the end-side clamping edge (21) of the end of the clamping piece, in the position of clamping of the electrical conductor (23), lies approximately opposite the cross edge (22) present at the inner wall area of the aperture collar.
  2. Spring-force clamp connector according to claim 1, characterized in that
    - the cross edge, which is present at the inner wall area (15) of the aperture collar, is formed by the lower edge (22) of the aperture collar of the material passage (11) in the direction if the conductor through-passage, and this cross edge is introduced for this purpose against the electrical conductor (23) to the be clamped.
  3. Spring-force clamp connector according to claim 2, characterized in that
    - the inner wall area (15) of the aperture collar in the region of the aperture collar (13), whose edge (22) forms the clamping site together with the end of the clamping piece (21) of the leaf spring, is designed as a shock-free, shaped inclined area (15) with smooth transitions.
  4. Spring-force clamp connector according to one of the preceding claims, characterized in that
    - the leaf spring is substantially bent in U shape and has at its end on the side opposite the clamping piece (20) a bearing piece (19), which extends with the clamping piece (20) of the leaf spring in the same material passage (11) of the conductive core piece (10) and which is adjacent to the inner wall area (14) of the aperture collar, which lies opposite the inner wall area (15) of the aperture collar that forms the clamping site.
  5. Spring force clamp connector according to one of the preceding claims, characterized in that
    - at the uncoated and closed clamping site, and end-side partial piece (25) of the clamping piece (20) of the leaf spring is found within the contour of the material passage, and, in fact, with a surface extent of the partial piece, which is the same size as or larger than the nominal cross section of the conductor (23) to be clamped,
    - in such a way the annular, closed inner wall area (14, 15) of the aperture collar with the end-side partial piece of the clamping piece (20) forms a conductor pre-capture pocket (24) that is encased in metal for the forward end of the electrical conductor (23) to be inserted.
  6. Spring-force clamp connector according to one of the preceding claims characterized in that
    - a central partial piece of the clamping piece (20) of the leaf spring lying outside the contour of the material passage (11) has a front convexity (26) in the direction of the spring clamping force of the clamping piece of the leaf spring.
    - such that a pressing tool (27) placed on this front convexity (26) and substantially perpendicular to the upper side of the conductive core piece (10) pushes back the clamping piece (20) up to a position in which the clamping site is completely opened.
EP03018505A 2002-08-22 2003-08-15 Spring clamp terminal for electrical conductor Expired - Lifetime EP1391965B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10239273A DE10239273A1 (en) 2002-08-22 2002-08-22 Spring clamp connection for an electrical conductor
DE10239273 2002-08-22

Publications (2)

Publication Number Publication Date
EP1391965A1 EP1391965A1 (en) 2004-02-25
EP1391965B1 true EP1391965B1 (en) 2009-01-28

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US (1) US6814608B2 (en)
EP (1) EP1391965B1 (en)
JP (1) JP4329897B2 (en)
KR (1) KR100935279B1 (en)
CN (1) CN100521370C (en)
AR (1) AR040981A1 (en)
AT (1) ATE422104T1 (en)
BR (1) BR0303275A (en)
CA (1) CA2437872C (en)
DE (2) DE10239273A1 (en)
ES (1) ES2319881T3 (en)
IL (1) IL157394A (en)
PL (1) PL205185B1 (en)
RU (1) RU2310258C2 (en)
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JP2004087500A (en) 2004-03-18
BR0303275A (en) 2004-08-24
EP1391965A1 (en) 2004-02-25
KR100935279B1 (en) 2010-01-06
PL361773A1 (en) 2004-02-23
TWI269501B (en) 2006-12-21
ES2319881T3 (en) 2009-05-14
TW200408176A (en) 2004-05-16
RU2003125825A (en) 2005-02-27
CA2437872A1 (en) 2004-02-22
JP4329897B2 (en) 2009-09-09
KR20040018203A (en) 2004-03-02
DE10239273A1 (en) 2004-03-04
IL157394A (en) 2010-11-30
ATE422104T1 (en) 2009-02-15
RU2310258C2 (en) 2007-11-10
AR040981A1 (en) 2005-04-27
CN1487626A (en) 2004-04-07
CA2437872C (en) 2011-03-22
CN100521370C (en) 2009-07-29
PL205185B1 (en) 2010-03-31
US6814608B2 (en) 2004-11-09
US20040077210A1 (en) 2004-04-22
IL157394A0 (en) 2004-02-19
DE50311140D1 (en) 2009-03-19

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