EP0054123B1 - Spring terminal - Google Patents

Spring terminal Download PDF

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Publication number
EP0054123B1
EP0054123B1 EP81108362A EP81108362A EP0054123B1 EP 0054123 B1 EP0054123 B1 EP 0054123B1 EP 81108362 A EP81108362 A EP 81108362A EP 81108362 A EP81108362 A EP 81108362A EP 0054123 B1 EP0054123 B1 EP 0054123B1
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EP
European Patent Office
Prior art keywords
contact element
contact
receiving
connecting conductor
bush
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
Application number
EP81108362A
Other languages
German (de)
French (fr)
Other versions
EP0054123A1 (en
Inventor
Jacques Kunz
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.)
Staeubli Electrical Connectors AG
Original Assignee
Multi Contact 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 Multi Contact AG filed Critical Multi Contact AG
Priority to AT81108362T priority Critical patent/ATE14642T1/en
Publication of EP0054123A1 publication Critical patent/EP0054123A1/en
Application granted granted Critical
Publication of EP0054123B1 publication Critical patent/EP0054123B1/en
Expired 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
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/20—Coupling parts carrying sockets, clips or analogous contacts and secured only to wire or cable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/44—Means for preventing access to live contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2101/00—One pole
    • 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
    • H01R4/70—Insulation of connections

Definitions

  • the invention relates to an electrical spring clip with an elongated, substantially cylindrical contact element which has a radial opening for receiving a first connection conductor and a socket-shaped extension on the outside insulated from contact with a central bore for receiving a second connection conductor, a provided on the contact element in a longitudinally displaceable manner, which is pressed out by spring tension from the receiving position for the first connecting conductor and can be transferred against this spring tension into the receiving position and which is made of insulating material and is provided with a sleeve-shaped pressing element, the lower part of the contact element at least in the receiving area of the first connecting conductor and its upper part in the area of the socket-shaped extension to protect against contact.
  • spring terminals are also referred to as “pole terminals” and are widely used for the construction of experimental, but also of permanently installed circuits, or of measuring circuits in the low and medium voltage range.
  • Spring or pole terminals of the aforementioned type are easy and convenient to use because the connecting conductor, after the pressing element has been raised, can only be inserted into the contact recess, generally a transverse bore in a contact pin or the like, whereupon the locking and contacting occurs simply by releasing the pressing element .
  • the problem with these contact terminals is securing the user against contact with live conductors, particularly when the contact element is raised, because in the usual designs in this state the contact recess and adjacent areas of the contact element are exposed.
  • contact or pole terminals with an additional socket part for connecting individual plugs are known.
  • the clamping part there does not have a displaceable pressure element which is under spring pressure, but rather a union nut which can be moved by hand between an open position and a pressure position and whose bore in the outer region is designed as a socket contact element.
  • These designs do not correspond to the type of spring clips mentioned at the beginning, and they lack the convenient and simple handling for connecting and disconnecting the conductor. With regard to protection against accidental contact, there are the same disadvantages as with the simple spring clips mentioned.
  • the object of the invention is to provide a spring clip which is characterized by convenient handling with flawless contact protection and has a socket part included in this contact protection for the connection of a second conductor.
  • This object of the invention in a spring clip of the type mentioned is achieved by the features of the characterizing part of claim 1.
  • the design according to the invention results in an improved, so to speak "double-walled” contact protection of the most exposed and therefore most likely to be subject to any damage to the socket part; at the same time, the easy handling of the spring clamp when connecting and disconnecting the first conductor is ensured by axially displacing the pressure element, and in addition the utilization of the pressure element for the additional shielding of the conductive components leads to a simple construction.
  • the plug is inserted as a second connecting conductor with a plug insulating jacket surrounding the conductive plug pin at a distance, a labyrinth-like nesting of the interlocking insulating sleeve and socket elements with comparatively large electrical creepage distances and excellent protection against contact.
  • the spring clip shown comprises a clamping part KT and a socket part BT.
  • the clamping contact element KK is pin-shaped and provided with a radial opening AK for receiving a first connecting conductor, not shown.
  • the clamping con reaches through with an inner bolt section clock element KK an insulating base element SE, which is inserted into a bore in a housing plate PL and is held on the inside of the housing by means of an insulating washer S and a screw connection V.
  • the socket part BT is formed by a socket-shaped extension BK formed integrally on the clamping part KT with a central bore AB for receiving a second connecting conductor, not shown.
  • the bush-shaped extension BK consists of an inner, thin-walled cylindrical guide body LK with an outer insulating cover ID. The latter is extended outward in the axial direction of the socket beyond the end of the guide body and forms an insulating opening section OA, so that a safety distance with a corresponding creepage distance is formed between the conductive component of the socket part BT and the socket opening.
  • a sleeve-shaped pressing element AP made of insulating material is axially displaceable on the outside.
  • This pressure element is biased in the starting position shown by a pressure spring AF in the axial direction outwards against an annular extension A of the sleeve-shaped extension BK, the radial opening AK being offset against a corresponding contact opening KO of the pressure element AP.
  • the pressing element AP is pressed downward in the axial direction against the pressing spring AF until the radial opening AK is aligned with the contact opening KO.
  • the connecting conductor is clamped between the clamping contact element KK and the wall of the pressing element AP, so that reliable contacting is ensured.
  • the contact opening KO is provided with an inner reinforcing flange F, which transmits the contact pressure to the connecting conductor.
  • the outer surface of the pressing element AP is provided with a ring-groove surface structure GR.
  • the overall one-piece pressing element AP has at its outer end section an upper part, which serves as the first insulating sleeve IHa, which engages around the socket contact element BK in the axial direction up to the height of the socket opening, in the illustrated rest position of the pressing element.
  • the comparatively large axial extent of the insulating sleeve IHa results in considerable creepage distances, so that a high level of safety is provided even in a humid atmosphere.
  • a cylindrical receiving space AR is formed for a plug insulating jacket, for example a conventional insulating sleeve surrounding the plug pin with a radial spacing.
  • a plug insulating jacket for example a conventional insulating sleeve surrounding the plug pin with a radial spacing.
  • the inner end portion of the pressure element AP forms a lower part IHb, which engages around the pressure spring AF and the outer part of the socket element SE.
  • the length of the axial overlap is dimensioned such that reliable shielding against contact by the user is ensured in the position of the pressing element AP that is maximally displaced outward.
  • a part serving as an insulating sleeve IHc is molded onto the base element SE, which in turn encompasses the inner, conductive components of the clamping part KT.
  • the one-piece design of the base element with its insulating sleeve also results in a construction part that can be produced with little effort. Overall, the manufacturing effort in a construction of the present type can be kept low despite the significantly improved touch shield.

Landscapes

  • Connector Housings Or Holding Contact Members (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Springs (AREA)

Abstract

1. Electrical spring terminal with an elongate essentially cylindrical contact element (KK) which has a radial perforation (AK) for receiving a first connecting conductor and a bush-shaped extension (BK) insulated on the outside against contact and possessing a central bore (AB) for receiving a second connecting conductor, there being a sleeve-shaped press-on element (AP) consisting of insulating material, which is mounted so as to be longitudinally displaceable on the contact element (KK) and is forced out of the receiving position for the first connecting conductor by means of spring tension and can be transferred into the receiving position against this spring tension, and which surrounds the contact element (KK) by means of its lower part (IHb) at least in the region receiving the first connecting conductor and by means of its upper part (IHa) in the region of the bush-shaped extension (BK), so as to secure the said contact element (KK) against contact, characterised in that a cylindrical receiving space (AR) for a plug-insulating sheath is formed between the inner face of the upper part (IHa) of the press-on element (AP) and the outer face of the bush-shaped extension (BK) of the contact element (KK).

Description

Die Erfindung bezieht sich auf eine elektrische Federklemme mit einem länglichen, im wesentlichen zylindrischen Kontaktelement, das eine radiale Durchbrechung für die Aufnahme eines ersten Anschlußleiters sowie eine an der Außenseite gegen Berührung isolierte buchsenförmige Verlängerung mit einer zentralen Bohrung zur Aufnahme eines zweiten Anschlußleiters aufweist, wobei ein am Kontaktelement längsverschiebbar gelagertes, mittels Federspannung aus der Aufnahmestellung für den ersten Anschlußleiter herausgedrücktes und gegen diese Federspannung in die Aufnahmestellung überführbares, aus Isolierstoff bestehendes hülsenförmiges Anpreßelement vorgesehen ist, welches mit seinem unteren Teil das Kontaktelement wenigstens im Aufnahmebereich des ersten Anschlußleiters sowie mit seinem oberen Teil im Bereich der buchsenförmigen Verlängerung gegen Berührung sichernd umfaßt.The invention relates to an electrical spring clip with an elongated, substantially cylindrical contact element which has a radial opening for receiving a first connection conductor and a socket-shaped extension on the outside insulated from contact with a central bore for receiving a second connection conductor, a provided on the contact element in a longitudinally displaceable manner, which is pressed out by spring tension from the receiving position for the first connecting conductor and can be transferred against this spring tension into the receiving position and which is made of insulating material and is provided with a sleeve-shaped pressing element, the lower part of the contact element at least in the receiving area of the first connecting conductor and its upper part in the area of the socket-shaped extension to protect against contact.

Solche Federklemmen werden in der Praxis auch als »Polklemmen« bezeichnet und finden breite Anwendung für den Aufbau von experimentellen, aber auch von festinstallierten Schaltungen, bzw. von Meßschaltungen im Nieder-und Mittelspannungsbereich.In practice, such spring terminals are also referred to as “pole terminals” and are widely used for the construction of experimental, but also of permanently installed circuits, or of measuring circuits in the low and medium voltage range.

Feder- oder Polklemmen der vorgenannten Art sind in der Handhabung einfach und bequem, weil der Anschlußleiter nach Anheben des Anpreßelementes lediglich in die Kontaktausnehmung, im allgemeinen eine Querbohrung eines Kontaktzapfens oder dergleichen, einzuführen ist, worauf die Arretierung und Kontaktgabe durch bloße Freigabe des Anpreßelementes eintritt. Problematisch bei diesen Kontaktklemmen ist jedoch die Sicherung des Benützers gegen Berührung mit spannungsführenden Leitern, insbesondere bei angehobenem Anpreßelement, weil bei den üblichen Ausführungen in diesem Zustand die Kontaktausnehmung und benachbarte Bereiche des Kontaktelementes freiliegen.Spring or pole terminals of the aforementioned type are easy and convenient to use because the connecting conductor, after the pressing element has been raised, can only be inserted into the contact recess, generally a transverse bore in a contact pin or the like, whereupon the locking and contacting occurs simply by releasing the pressing element . The problem with these contact terminals, however, is securing the user against contact with live conductors, particularly when the contact element is raised, because in the usual designs in this state the contact recess and adjacent areas of the contact element are exposed.

Daneben sind Kontakt- bzw. Polklemmen mit einem zusätzlichen Buchsenteil für den Anschluß von Einzelsteckern bekannt. Das Klemmteil weist dort jedoch kein verschiebbares und unter Federdruck stehendes Anpreßelement auf, sondern eine von Hand durch Drehen zwischen einer Öffnungsstellung und einer Anpreßstellung bewegliche Überwurfmutter, deren Bohrung im äußeren Bereich als Buchsen-Kontaktelement ausgebildet ist. Diese Ausführungen entsprechen nicht der eingangs erwähnten Gattung von Federklemmen, und es fehlt ihnen die bequeme und einfache Handhabung zum Anschließen und Lösen des Leiters. Hinsichtlich Berührungsschutz des Benützers bestehen die gleichen Nachteile wie bei den erwähnten, einfachen Federklemmen.In addition, contact or pole terminals with an additional socket part for connecting individual plugs are known. However, the clamping part there does not have a displaceable pressure element which is under spring pressure, but rather a union nut which can be moved by hand between an open position and a pressure position and whose bore in the outer region is designed as a socket contact element. These designs do not correspond to the type of spring clips mentioned at the beginning, and they lack the convenient and simple handling for connecting and disconnecting the conductor. With regard to protection against accidental contact, there are the same disadvantages as with the simple spring clips mentioned.

Aus der FR-A-1 081 200 ist eine Federklemme der eingangs genannten Art bekannt, welche im Normalfall wohl einen gewissen Schutz gegen Berührung des spannungsführenden Kontaktelementes geben kann. Bei starker Verschiebung des Anpreßelementes ist jedoch die obere Stirnfläche des Kontaktelementes einer unbeabsichtigten Berührung zugänglich. Außerdem ist der obere Rand des aus Isolierstoff bestehenden Anpreßelementes sehr exponiert und kann leicht beschädigt werden, so daß der Berührungsschutz nicht mehr gegeben ist. Im wesentlichen die gleichen Nachteile sind auch bei der Klemme vorhanden, die in der »Polytechnischen Zeitschrift«, Band 28, Nr. 21, 1973, Seite 711 gezeigt ist.From FR-A-1 081 200 a spring clip of the type mentioned is known, which in the normal case can probably provide some protection against contact with the live contact element. If the pressure element is moved strongly, however, the upper end face of the contact element is accessible to accidental contact. In addition, the upper edge of the pressure element made of insulating material is very exposed and can be easily damaged, so that protection against contact is no longer provided. Essentially the same disadvantages also exist with the clamp which is shown in the "Polytechnische Zeitschrift", Volume 28, No. 21, 1973, page 711.

Aufgabe der Erfindung ist die Schaffung einer Federklemme, die sich durch bequeme Handhabung bei einwandfreiem Berührungsschutz auszeichnet und ein in diesen Berührungsschutz einbezogenen Buchsenteil für den Anschluß eines zweiten Leiters aufweist. Die erfindungsgemäße Lösung dieser Aufgabe bei einer Federklemme der eingangs genannten Gattung erfolgt durch die Merkmale des kennzeichnenden Teils des Anspruchs 1.The object of the invention is to provide a spring clip which is characterized by convenient handling with flawless contact protection and has a socket part included in this contact protection for the connection of a second conductor. This object of the invention in a spring clip of the type mentioned is achieved by the features of the characterizing part of claim 1.

Durch die erfindungsgemäße Ausbildung ergibt sich zum einen ein verbesserter, sozusagen »doppelwandiger« Berührungsschutz des am meisten exponierten und deshalb auch am ehesten einer allfälligen Beschädigung unterworfenen Buchsenteiles; gleichzeitig ist die einfache Handhabung der Federklemme beim Anschließen und Lösen des ersten Leiters durch axiales Verschieben des Anpreßelementes gewährleistet, wobei außerdem die Ausnutzung des Anpreßelementes für die zusätzliche Abschirmung der leitfähigen Bestandteile zu einer einfachen Konstruktion führt. Zum andern ergibt sich bei eingesetztem Stecker als zweitem Anschlußleiter mit einem zylindrisch mit Abstand den leitenden Steckerstift umgebenden Steckerisoliermantel eine labyrinthartige Schachtelung der ineinandergreifenden Isolierhülse und Buchsenelemente mit vergleichsweise großen elektrischen Kriechwegen und einem hervorragenden Berührungsschutz.On the one hand, the design according to the invention results in an improved, so to speak "double-walled" contact protection of the most exposed and therefore most likely to be subject to any damage to the socket part; at the same time, the easy handling of the spring clamp when connecting and disconnecting the first conductor is ensured by axially displacing the pressure element, and in addition the utilization of the pressure element for the additional shielding of the conductive components leads to a simple construction. On the other hand, when the plug is inserted as a second connecting conductor with a plug insulating jacket surrounding the conductive plug pin at a distance, a labyrinth-like nesting of the interlocking insulating sleeve and socket elements with comparatively large electrical creepage distances and excellent protection against contact.

Dieser kann noch weiter dadurch verbessert werden, daß an der Außenfläche der buchsenförmigen Verlängerung des Kontaktelementes eine eigene Isolierabdeckung angebracht ist.This can be further improved in that a separate insulating cover is attached to the outer surface of the socket-shaped extension of the contact element.

Nicht zuletzt ist auch eine wirksame mechanische Abdichtung der Federklemmen gegen eindringenden Staub gegeben, was schließlich der Langlebigkeit und Zuverlässigkeit der Federklemme zugutekommt.Last but not least, there is also an effective mechanical seal of the spring clips against the ingress of dust, which ultimately benefits the durability and reliability of the spring clips.

Weitere Vorteile der Erfindung werden anhand des in der Zeichnung dargestellten Ausführungsbeispiels erläutert. Hierin ist eine erfindungsgemäße Federklemme mit Buchsenteil in einem Axial-Teilschnitt wiedergegeben.Further advantages of the invention will be explained with reference to the embodiment shown in the drawing. This shows a spring clip according to the invention with a socket part in a partial axial section.

Die dargestellte Federklemme umfaßt ein Klemmteil KT und ein Buchsenteil BT. Das Klemm-Kontaktelement KK ist stiftförmig ausgebildet und mit einer radialen Durchbrechung AK für die Aufnahme eines nicht dargestellten ersten Anschlußleiters versehen. Mit einem inneren Bolzenabschnitt durchgreift das Klemm-Kontaktelement KK ein isolierendes Sockelelement SE, welches in eine Bohrung einer Gehäuseplatte PL eingesetzt und an der Gehäuseinnenseite mittels einer Isolierscheibe S sowie einer Verschraubung V gehalten ist. Das Buchsenteil BT wird durch eine am Klemmteil KT einstückig ausgebildete buchsenförmige Verlängerung BK mit einer zentralen Bohrung AB für die Aufnahme eines zweiten, nicht dargestellten Anschlußleiters gebildet. Die buchsenförmige Verlängerung BK besteht aus einem inneren, dünnwandigzylindrischen Leitkörper LK mit einer äußeren Isolierabdeckung ID. Letztere ist in Axialrichtung der Buchse nach außen hin über das Ende des Leitkörpers hinaus verlängert und bildet einen isolierenden Öffnungsabschnitt OA, so daß ein Sicherheitsabstand mit entsprechendem Kriechweg zwischen dem leitfähigen Bestandteil des Buchsenteils BT und der Buchsenöffnung gebildet ist.The spring clip shown comprises a clamping part KT and a socket part BT. The clamping contact element KK is pin-shaped and provided with a radial opening AK for receiving a first connecting conductor, not shown. The clamping con reaches through with an inner bolt section clock element KK an insulating base element SE, which is inserted into a bore in a housing plate PL and is held on the inside of the housing by means of an insulating washer S and a screw connection V. The socket part BT is formed by a socket-shaped extension BK formed integrally on the clamping part KT with a central bore AB for receiving a second connecting conductor, not shown. The bush-shaped extension BK consists of an inner, thin-walled cylindrical guide body LK with an outer insulating cover ID. The latter is extended outward in the axial direction of the socket beyond the end of the guide body and forms an insulating opening section OA, so that a safety distance with a corresponding creepage distance is formed between the conductive component of the socket part BT and the socket opening.

Auf der durch das Klemm-Kontaktelement KK und die buchsenförmige Verlängerung BK gebildeten, insgesamt stiftartig ausgebildeten Baueinheit ist außen axial verschiebbar ein aus Isolierstoff bestehendes, hülsenförmiges Anpreßelement AP gelagert. Dieses Anpreßelement ist in der dargestellten Ausgangslage durch eine Anpreßfeder AF in Axialrichtung nach außen gegen einen ringförmigen Ansatz A der hülsenförmigen Verlängerung BK vorgespannt, wobei die radiale Durchbrechung AK gegen eine entsprechende Kontaktöffnung KO des Anpreßelementes AP versetzt ist. Zum Einführen des nicht dargestellten ersten Anschlußleiters, beispielsweise eines entsprechenden Leitungsdrahtendes, wird das Anpreßelement AP in Axialrichtung gegen die Anpreßfeder AF nach unten gedrückt, bis die radiale Durchbrechung AK mit der Kontaktöffnung KO fluchtet. Nach Freigabe des Anpreßelementes AP wird der Anschlußleiter zwischen dem Klemm-Kontaktelement KK und der Wandung des Anpreßelementes AP verspannt, so daß eine sichere Kontaktgabe gewährleistet ist. Die Kontaktöffnung KO ist dazu mit einem inneren Verstärkungsflansch F versehen, der die Anpreßkraft auf den Anschlußleiter überträgt. Zur erleichterten Handhabung beim Einsetzen des ersten Anschlußleiters ist die Außenfläche des Anpreßelementes AP mit einer Ring-Nut-Oberflächengliederung GR versehen.On the overall pin-shaped unit formed by the clamping contact element KK and the socket-shaped extension BK, a sleeve-shaped pressing element AP made of insulating material is axially displaceable on the outside. This pressure element is biased in the starting position shown by a pressure spring AF in the axial direction outwards against an annular extension A of the sleeve-shaped extension BK, the radial opening AK being offset against a corresponding contact opening KO of the pressure element AP. To insert the first connecting conductor (not shown), for example a corresponding wire end, the pressing element AP is pressed downward in the axial direction against the pressing spring AF until the radial opening AK is aligned with the contact opening KO. After the pressing element AP has been released, the connecting conductor is clamped between the clamping contact element KK and the wall of the pressing element AP, so that reliable contacting is ensured. For this purpose, the contact opening KO is provided with an inner reinforcing flange F, which transmits the contact pressure to the connecting conductor. To facilitate handling when inserting the first connecting conductor, the outer surface of the pressing element AP is provided with a ring-groove surface structure GR.

Das insgesamt einstückig ausgebildete Anpreßelement AP weist an seinem äußeren Endabschnitt einen oberen, als erste Isolierhülse IHa dienenden Teil auf, der das Buchsen-Kontaktelement BK in Axialrichtung bis in Höhe der Buchsenöffnung umgreift, und zwar in der dargestellten Ruhelage des Anpreßelementes. Dadurch ergibt sich die erstrebte Abschirmung der innenliegenden Leiterbestandteile der Klemme gegen Berührung. Die vergleichsweise große Axialerstreckung der Isolierhülse IHa ergibt hier beträchtliche Kriechweglängen, so daß auch bei feuchter Atmosphäre eine hohe Sicherheit gegeben ist.The overall one-piece pressing element AP has at its outer end section an upper part, which serves as the first insulating sleeve IHa, which engages around the socket contact element BK in the axial direction up to the height of the socket opening, in the illustrated rest position of the pressing element. This results in the desired shielding of the internal conductor components of the terminal against contact. The comparatively large axial extent of the insulating sleeve IHa results in considerable creepage distances, so that a high level of safety is provided even in a humid atmosphere.

Zwischen der Innenfläche des oberen, als erste Isolierhülse IHa dienenden Teils und der Außenfläche der buchsenförmigen Verlängerung BK ist ein zylindrischer Aufnahmeraum AR für einen Steckerisoliermantel gebildet, etwa eine an sich übliche, den Steckerstift mit Radialabstand umgebende Isolierhülse. Damit ergibt sich eine gegenseitige axiale Übergreifung mehrerer hülsenförmiger Isolierteile nach Art einer Labyrinthdichtung mit entsprechend hochwertiger Abschirmung und Isolierung. Dazu trägt insbesondere auch die Isolierabdeckung ID der buchsenförmigen Verlängerung BK bei, ebenso auch der isolierende Öffnungsabschnitt OA am äußeren Ende des Buchsen-Leitkörpers LK.Between the inner surface of the upper part, which serves as the first insulating sleeve IHa, and the outer surface of the socket-shaped extension BK, a cylindrical receiving space AR is formed for a plug insulating jacket, for example a conventional insulating sleeve surrounding the plug pin with a radial spacing. This results in a mutual axial overlap of several sleeve-shaped insulating parts in the manner of a labyrinth seal with correspondingly high-quality shielding and insulation. The insulating cover ID of the socket-shaped extension BK also contributes to this, as does the insulating opening section OA at the outer end of the socket guide body LK.

Der innere Endabschnitt des AnpreßelementesAP bildet einen unteren Teil IHb, welcher die Anpreßfeder AF und den äußeren Teil des Sokkelelementes SE umgreift. Auch hier ist die Länge der Axialübergreifung so bemessen, daß eine zuverlässige Abschirmung gegen Berührung durch den Benutzer in der maximal nach außen verschobenen Lage des Anpreßelementes AP gewährleistet ist. Für diese Axialübergreifung ist am Sockelelement SE ein als Isolierhülse IHc dienendes Teil angeformt, das seinerseits die inneren, leitenden Bestandteile des Klemmteils KT umgreift. Durch die einstückige Ausbildung des Sockelelementes mit seiner Isolierhülse ergibt sich auch hier ein mit geringem Aufwand herstellbares Konstruktionsteil. Insgesamt kann der Herstellungsaufwand bei einer Konstruktion der vorliegenden Art trotz der wesentlich verbesserten Berührungsabschirmung niedrig gehalten werden.The inner end portion of the pressure element AP forms a lower part IHb, which engages around the pressure spring AF and the outer part of the socket element SE. Here too, the length of the axial overlap is dimensioned such that reliable shielding against contact by the user is ensured in the position of the pressing element AP that is maximally displaced outward. For this axial overlap, a part serving as an insulating sleeve IHc is molded onto the base element SE, which in turn encompasses the inner, conductive components of the clamping part KT. The one-piece design of the base element with its insulating sleeve also results in a construction part that can be produced with little effort. Overall, the manufacturing effort in a construction of the present type can be kept low despite the significantly improved touch shield.

Claims (4)

1. Electrical spring terminal with an elongate essentially cylindrical contact element (KK) which has a radial perforation (AK) for receiving a first connecting conductor and a bush-shaped extension (BK) insulated on the outside against contact and possessing a central bore (AB) for receiving a second connecting conductor, there being a sleeve-shaped press-on element (AP) consisting of insulating material, which is mounted so as to be longitudinally displaceable on the contact element (KK) and is forced out of the receiving position for the first connecting conductor by means of spring tension and can be transferred into the receiving position against this spring tension, and which surrounds the contact element (KK) by means of its lower part (lHb) at least in the region receiving the first connecting conductor and by means of its upper part (lHa) in the region of the bush-shaped extension (BK), so as to secure the said contact element (KK) against contact, characterised in that a cylindrical receiving space (AR) for a plug- insulating sheath is formed between the inner face of the upper part (IHa) of the press-on element (AP) and the outer face of the bush-shaped extension (BK) of the contact element (KK).
2. Spring terminal according to claim 1, characterised in that a special insulating covering (ID) is provided on the outer face of the bush-shaped extension (BK) of the contact element (KK).
3. Spring terminal according to claim 2, characterised in that the lower part (lHb) of the press-on element (AP) is enlarged in diameter and engages over an insulating sleeve (IHc) encasing the foot of the cylindrical contact element (KK).
4. Spring terminal according to claim 3, characterised in that the insulating sleeve (lHc) encasing the foot of the cylindrical contact element (KK) engages around at least the lower part of the press-on spring (AF).
EP81108362A 1980-12-12 1981-10-15 Spring terminal Expired EP0054123B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81108362T ATE14642T1 (en) 1980-12-12 1981-10-15 ELECTRIC SPRING CLAMP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803046957 DE3046957A1 (en) 1980-12-12 1980-12-12 "ELECTRICAL CONTACT TERMINAL"
DE3046957 1980-12-12

Publications (2)

Publication Number Publication Date
EP0054123A1 EP0054123A1 (en) 1982-06-23
EP0054123B1 true EP0054123B1 (en) 1985-07-31

Family

ID=6119056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108362A Expired EP0054123B1 (en) 1980-12-12 1981-10-15 Spring terminal

Country Status (4)

Country Link
EP (1) EP0054123B1 (en)
JP (1) JPS57123668A (en)
AT (1) ATE14642T1 (en)
DE (2) DE3046957A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
YU157585A (en) * 1985-10-03 1988-02-29 Iskra Sozd Elektro Indus Safety plug
FR2754645B1 (en) * 1996-10-11 1998-12-31 Carrier Kheops Bac LOW VOLTAGE ELECTRICAL CONNECTOR
ATE298141T1 (en) * 2002-02-02 2005-07-15 Wolfgang B Thoerner POLE CLAMP
US7481683B1 (en) * 2007-09-11 2009-01-27 Fluke Corporation Retractable contact post shield and method
CN112208370B (en) * 2020-09-04 2024-04-05 东莞市趣电智能科技有限公司 Charging device
GB2622007A (en) * 2022-08-30 2024-03-06 Viper Innovations Ltd Electrical connector

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE374983C (en) * 1923-05-05 Josef Heinrich Rosenhamer Spring clip
FR1081200A (en) * 1953-04-24 1954-12-16 Onera (Off Nat Aerospatiale) Electrical connection device
DE1036969B (en) * 1955-08-03 1958-08-21 Hirschmann Radiotechnik Quick release connector
DE1292227B (en) * 1955-10-14 1969-04-10 Breuning Electrical clamping socket
DE1119940B (en) * 1960-09-21 1961-12-21 Seger & Angermeyer Desco Werk Screwless connection terminal with spring-loaded pressure contact
US3349365A (en) * 1965-08-04 1967-10-24 Us Terminals Inc Spring loaded electrical terminal
DE1946158C3 (en) * 1969-09-12 1974-03-07 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt High voltage connector
US3806860A (en) * 1972-12-07 1974-04-23 D Flammini Electrical binding post

Also Published As

Publication number Publication date
EP0054123A1 (en) 1982-06-23
ATE14642T1 (en) 1985-08-15
DE3171603D1 (en) 1985-09-05
JPS57123668A (en) 1982-08-02
DE3046957A1 (en) 1982-07-15

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