EP0042495B1 - Protecting plug for covering a socket or for opening contacts in the socket - Google Patents

Protecting plug for covering a socket or for opening contacts in the socket Download PDF

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Publication number
EP0042495B1
EP0042495B1 EP81103885A EP81103885A EP0042495B1 EP 0042495 B1 EP0042495 B1 EP 0042495B1 EP 81103885 A EP81103885 A EP 81103885A EP 81103885 A EP81103885 A EP 81103885A EP 0042495 B1 EP0042495 B1 EP 0042495B1
Authority
EP
European Patent Office
Prior art keywords
plug
socket
switching contacts
contacts
spring tongues
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
EP81103885A
Other languages
German (de)
French (fr)
Other versions
EP0042495A1 (en
Inventor
Anneliese Stoewe
Gunter Hegner
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.)
ADC GmbH
Original Assignee
Krone GmbH
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 Krone GmbH filed Critical Krone GmbH
Priority to AT81103885T priority Critical patent/ATE10988T1/en
Publication of EP0042495A1 publication Critical patent/EP0042495A1/en
Application granted granted Critical
Publication of EP0042495B1 publication Critical patent/EP0042495B1/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
    • 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
    • H01R13/443—Dummy plugs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H27/00—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings
    • H01H27/04—Insulating plug or plate inserted between normally closed contacts

Definitions

  • the invention relates to a blind plug or isolating plug for covering or separating switching contacts in LSA-PLUS connection strips of telecommunications equipment.
  • connection system - LSA PLUS system for short - according to which the thin wires of telephone cables can be connected without soldering, screwing and stripping to specially designed contact elements, for example terminal strips.
  • These contact elements have at least two upright spring tongues, which delimit a slot into which the respective wire is pressed transversely.
  • the spring tongues and the slot are dimensioned such that when the wire is pushed in, the sharp side edges of the spring tongues cut the insulation and at the same time these side edges penetrate slightly into the conductor material of the wire.
  • the object of the invention is to develop a blind plug or isolating plug of the type mentioned at the beginning, with which the contact points of the contact elements can be covered in a space-saving and reliable manner or can be separated in a contactless manner while avoiding contamination by plastic abrasion.
  • this object is achieved in that a widened central support part connects to an upper pulling head of the plug, on the underside of which two spring tongues with latching lugs and a central guide web are arranged between them, and that the plug can be inserted into the LSA-PLUS terminal strip and therein can be locked with the locking lugs.
  • a plurality of centering projections are preferably integrally formed in the central support part.
  • extensions for separating switching contacts in the terminal block are advantageously provided on the spring tongues below the latching lugs.
  • the spring tongues with their locking lugs are designed in such a way that when the blind or isolating plug is inserted into the corresponding opening of the connection strip, they provide a space-saving and reliable cover for the switching contacts by snapping the locking lugs behind shoulders in the connection strip and, in the case of the disconnecting plug, simultaneously open the switching contacts without touching the contact points on the spring tabs of the switch contacts.
  • a secure, non-slip fit of the plug in the terminal block is ensured in the embodiment of the invention by the centering projections formed on the middle support part, which engage in the recesses provided in the terminal strips when the plug is pressed in.
  • the isolating plug 1 shown in FIGS. 1 to 3 consists of a one-piece plastic part and has a central widened support part 2, on which an upper pulling head 4 and at the bottom two spring tongues 5 with outwardly facing locking lugs 6 and a central guide web 3 are formed in between .
  • the locking lugs 6 each have a lateral inclined ramp 6a and a lower extension 6b, which serves to separate normally closed contacts in the terminal block.
  • two centering shoulders 8 with inclined surfaces are formed on both sides of the lower surface of the central support part 2. Furthermore, a through hole 7 is provided in the pulling head 4, into which a suitably designed tool can be inserted to pull out the isolating plug.
  • the spring tongues 5 When inserting the isolating plug into a corresponding opening in a terminal block (not shown), the spring tongues 5 are pushed out laterally due to the catches 6 formed inclined ramps 6a bent back. As soon as the isolating plug 1 has reached its final covering position, the two tongues 5 spring back and the latching lugs 6 engage behind corresponding recesses in the terminal strip. At the same time, the centering lugs 8 also engage in corresponding notches or recesses in the terminal block.
  • the contact points of the contact elements or the normally closed contacts are separated by the extensions 6b of the detents 6, but plastic abrasion from these parts of the isolating plug 1 at the contact points of the contact elements is avoided and these remain clean.

Abstract

A plug for masking switching contacts, for instance in terminal strips of telecommunication devices, comprising an upper pulling head, a widened central supporting portion, and two lower spring tongues with a guiding web disposed therebetween. The plug is integrally formed and has the function of masking or, respectively, separating solderless, screwless and stripless switching contacts (so-called LSA-PLUS contacts) in terminal strips, wherein the contact points of these switching contacts are not touched by any parts of the plug so as to avoid contamination.

Description

Die Erfindung betrifft einen Blindstecker oder Trennstecker zum Abdecken oder Trennen von Schaltkontakten in LSA-PLUS-Anschlussleisten fernmeldetechnischer Geräte.The invention relates to a blind plug or isolating plug for covering or separating switching contacts in LSA-PLUS connection strips of telecommunications equipment.

Die Anmelderin hat ein mittlerweile weit verbreitetes Anschlusssystem - kurz LSA-PLUS-System - entwickelt, nach welchem die dünnen Adern von Fernsprechkabeln löt-, schraub- und abisolierfrei an speziell ausgebildete Kontaktelemente von beispielsweise Anschlussleisten angeschaltet werden können. Diese Kontaktelemente weisen mindestens zwei aufrechtstehende Federzungen auf, welche einen Schlitz begrenzen, in den die jeweilige Ader quer hineingedrückt wird. Die Federzungen und der Schlitz sind so bemessen, dass beim Hineindrücken der Ader von den scharfen Seitenkanten der Federzungen die Isolation zerschnitten wird und gleichzeitig diese Seitenkanten geringfügig in das Leitermaterial der Ader eindringen.The applicant has developed a now widely used connection system - LSA PLUS system for short - according to which the thin wires of telephone cables can be connected without soldering, screwing and stripping to specially designed contact elements, for example terminal strips. These contact elements have at least two upright spring tongues, which delimit a slot into which the respective wire is pressed transversely. The spring tongues and the slot are dimensioned such that when the wire is pushed in, the sharp side edges of the spring tongues cut the insulation and at the same time these side edges penetrate slightly into the conductor material of the wire.

Auf diese Weise ergibt sich ein auch nach langen Betriebszeiten elektrisch sicherer und mechanisch festerelektrischerAnschluss.This results in an electrically safe and mechanically fixed electrical connection even after long operating times.

Moderne fernsprechtechnische Geräte und ihre Anschlussleisten weisen eine Vielzahl von auf engem Raum dicht nebeneinander angeordneten Kontaktelementen auf, um eine entsprechend grosse Anzahl von Adern anschalten zu können. Aufgrund der standardisierten Grösse von Anschlussleisten ergibt sich häufig der Fall, dass eine gewisse Anzahl von Schaltelementen für einen gegebenen Anwendungsfall nicht benötigt wird.Modern telephony devices and their connection strips have a large number of contact elements arranged closely next to one another in a narrow space in order to be able to connect a correspondingly large number of wires. Due to the standardized size of the terminal strips, it is often the case that a certain number of switching elements are not required for a given application.

Aus der US-A-4108 522 ist ein Stecker zum Abdecken und Trennen von andersartigen Schaltkontakten bekannt, bei dem an einem oberen Ziehkopf ein verbreiteter mittlerer Stützteil anschliesst, an dessen Unterseite zwei Federzungen mit Rastnasen und zwischen diesen ein zentraler Führungssteg angeordnet sind, und der auf eine Buchsenleiste, diese mit den Rastnasen umgreifend, aufrastbar ist.From US-A-4108 522 a plug for covering and separating other types of switching contacts is known, in which a common middle support part connects to an upper pulling head, on the underside of which two spring tongues with locking lugs and a central guide web are arranged, and the on a female connector, which can be snapped around with the catches.

Weiter ist aus der US-A-2239426 ein elektrischer Schalter zum Schalten ebenfalls anderer Schaltkontakte als solcher des LSA-PLUS-Systems bekannt, der einen Stecker aus einem einstückigen Kunststoffteil aufweist.Furthermore, from US-A-2239426 an electrical switch for switching switching contacts other than those of the LSA-PLUS system is known, which has a plug made of a one-piece plastic part.

Aufgabe der Erfindung ist es, einen Blindstekker oder Trennstecker der eingangs genannten Art zu entwickeln, mit welchem die Kontaktstellen der Kontaktelemente in raumsparender und zuverlässiger Weise abgedeckt oder zusätzlich berührungslos unter Vermeidung von Verschmutzungen durch Kunststoffabrieb getrennt werden können.The object of the invention is to develop a blind plug or isolating plug of the type mentioned at the beginning, with which the contact points of the contact elements can be covered in a space-saving and reliable manner or can be separated in a contactless manner while avoiding contamination by plastic abrasion.

Erfindungsgemäss wird diese Aufgabe dadurch gelöst, dass an einem oberen Ziehkopf des Steckers ein verbreiterter mittlerer Stützteil anschliesst, an dessen Unterseite zwei Federzungen mit Rastnasen und zwischen diesen ein zentraler Führungssteg angeordnet sind, und dass der Stecker in die LSA-PLUS-Anschlussleiste einsteckbar und darin mit den Rastnasen verrastbar ist.According to the invention, this object is achieved in that a widened central support part connects to an upper pulling head of the plug, on the underside of which two spring tongues with latching lugs and a central guide web are arranged between them, and that the plug can be inserted into the LSA-PLUS terminal strip and therein can be locked with the locking lugs.

Vorzugsweise sind im mittleren Stützteil mehrere Zentrieransätze angeformt.A plurality of centering projections are preferably integrally formed in the central support part.

Im Fall des Trennsteckers sind vorteilhaft an den Federzungen unterhalb der Rastnasen Verlängerungen zum Trennen von Schaltkontakten in der Anschlussleiste vorgesehen.In the case of the isolating plug, extensions for separating switching contacts in the terminal block are advantageously provided on the spring tongues below the latching lugs.

Die Federzungen mit ihren Rastnasen sind so gestaltet, dass sie beim Einstecken des Blind-oder Trennsteckers in die entsprechende Öffnung der Anschlussleiste eine raumsparende und zuverlässige Abdeckung der Schaltkontakte durch Einrasten der Rastnasen hinter Schultern in der Anschlussleiste ergeben und im Fall des Trennsteckers gleichzeitig die Schaltkontakte auftrennen, ohne die Kontaktstellen an den Federlaschen der Schaltkontakte zu berühren.The spring tongues with their locking lugs are designed in such a way that when the blind or isolating plug is inserted into the corresponding opening of the connection strip, they provide a space-saving and reliable cover for the switching contacts by snapping the locking lugs behind shoulders in the connection strip and, in the case of the disconnecting plug, simultaneously open the switching contacts without touching the contact points on the spring tabs of the switch contacts.

Ein sicherer unverrutschbarer Sitz des Stekkers in der Anschlussleiste wird bei der Ausgestaltung der Erfindung durch die am mittleren Stützteil angeformten Zentrieransätze gewährleistet, die beim Eindrücken des Steckers in dafür vorgesehene Ausnehmungen der Anschlussleisten eingreifen.A secure, non-slip fit of the plug in the terminal block is ensured in the embodiment of the invention by the centering projections formed on the middle support part, which engage in the recesses provided in the terminal strips when the plug is pressed in.

Im folgenden werden Ausführungsbeispiele der Erfindung anhand der Zeichnung im einzelnen beschrieben.Exemplary embodiments of the invention are described in detail below with reference to the drawing.

Es zeigen:

  • Fig. einen Trennstecker in Vorderansicht;
  • Fig. den Trennstecker nach Fig. 1 in teilgeschnittener Seitenansicht;
  • Fig.3 den Trennstecker nach Fig.1 in Draufsicht;
  • Fig. 4 einen Blindstecker in Vorderansicht;
  • Fig.5 den Blindstecker nach Fig.4 in teilgeschnittener Seitenansicht;
  • Fig. den Blindstecker nach Fig. 5 in Draufsicht.
Show it:
  • Fig. A connector in front view;
  • Fig. The isolating plug of Figure 1 in a partially sectioned side view.
  • 3 shows the isolating plug according to Figure 1 in plan view;
  • Figure 4 is a blind connector in front view.
  • 5 shows the blind plug according to Figure 4 in a partially sectioned side view;
  • Fig. 5 the blind plug of FIG. 5 in plan view.

Der in den Fig. 1 bis 3 dargestellte Trennstecker 1 besteht aus einem einstückigen Kunststoffteil und weist einen mittleren verbreiterten Stützteil 2 auf, an dem ein oberer Ziehkopf 4 sowie unten zwei Federzungen 5 mit nach aussen weisenden Rastnasen 6 und dazwischen ein zentraler Führungssteg 3 angeformt sind. Die Rastnasen 6 weisen je eine seitliche Schrägrampe 6a und eine untere Verlängerung 6b auf, die zum Trennen von Ruhekontakten in der Anschlussleiste dient.The isolating plug 1 shown in FIGS. 1 to 3 consists of a one-piece plastic part and has a central widened support part 2, on which an upper pulling head 4 and at the bottom two spring tongues 5 with outwardly facing locking lugs 6 and a central guide web 3 are formed in between . The locking lugs 6 each have a lateral inclined ramp 6a and a lower extension 6b, which serves to separate normally closed contacts in the terminal block.

Zur Sicherung des in die Anschlussleiste eingedrückten Trennsteckers 1 gegen seitliche Verschiebungen sind an der Unterfläche des mittleren Stützteiles 2 beidseitig jeweils zwei Zentrieransätze 8 mit Schrägflächen angeformt. Ferner ist im Ziehkopf 4 eine Durchgangsbohrung 7 vorgesehen, in welche zum Herausziehen des Trennsteckers ein entsprechend ausgebildetes Werkzeug eingeführt werden kann.In order to secure the isolating plug 1 pressed into the terminal block against lateral displacements, two centering shoulders 8 with inclined surfaces are formed on both sides of the lower surface of the central support part 2. Furthermore, a through hole 7 is provided in the pulling head 4, into which a suitably designed tool can be inserted to pull out the isolating plug.

Beim Einsetzen des Trennsteckers in eine entsprechende Öffnung in einer - nicht dargestellten - Anschlussleiste werden die Federzungen 5 seitlich aufgrund der an den Rastnasen 6 ausgebildeten schrägen Rampen 6a zurückgebogen. Sobald der Trennstecker 1 seine endgültige Abdeckposition erreicht hat, federn die beiden Zungen 5 zurück, und die Rastnasen 6 hintergreifen entsprechende Ausnehmungen in der Anschlussleiste. Gleichzeitig greifen auch die Zentrieransätze 8 in entsprechende Kerben oder Ausnehmungen der Anschlussleiste.When inserting the isolating plug into a corresponding opening in a terminal block (not shown), the spring tongues 5 are pushed out laterally due to the catches 6 formed inclined ramps 6a bent back. As soon as the isolating plug 1 has reached its final covering position, the two tongues 5 spring back and the latching lugs 6 engage behind corresponding recesses in the terminal strip. At the same time, the centering lugs 8 also engage in corresponding notches or recesses in the terminal block.

Die Kontaktstellen der Kontaktelemente bzw. der Ruhekontakte werden dabei von den Verlängerungen 6b der Rastnasen 6 aufgetrennt, wobei jedoch ein Kunststoffabrieb von diesen Teilen des Trennsteckers 1 an den Kontaktstellen der Kontaktelemente vermieden wird und diese sauber bleiben.The contact points of the contact elements or the normally closed contacts are separated by the extensions 6b of the detents 6, but plastic abrasion from these parts of the isolating plug 1 at the contact points of the contact elements is avoided and these remain clean.

Bei der Ausführung nach Fig. 4 bis 6, welche in ihren wesentlichen Bauteilen dem Trennstecker nach Fig. 1 bis 3 entspricht, sind lediglich die Federzungen 5 mit ihren Rastnasen 6 sowie der zentrale Führungssteg 3 verkürzt, wodurch sich ein sog. Blindstecker ergibt, der die Steckeröffnung in der Anschlussleiste verschliesst und einen Abgriff verhindert. Bei dieser Ausführung werden die Ruhekontaktfedern in der Anschlussleiste nicht berührt, da die Verlängerungen 6b an den Federzungen 5 des Trennsteckers nach Fig. 1 bis 3 fehlen. Der zentrale Führungssteg 3 verläuft parallel zu den beiden Federzungen 5 unter einem gewissen Zwischenabstand und weist einen schmaleren Endteil mit balligen Führungsflächen auf, der über Schrägflächen in einen breiteren Führungsteil übergeht. Dieser Führungssteg 3 dient zur Führung des Blindsteckers 1 bei seinem Einsetzen in die vorgesehene Öffnung der Anschlussleiste, was entweder von Hand oder unter Zuhilfenahme eines in die Öffnung eingreifenden Werkzeuges vorgenommen werden kann.4 to 6, which corresponds in its essential components to the isolating plug according to FIGS. 1 to 3, only the spring tongues 5 with their locking lugs 6 and the central guide web 3 are shortened, resulting in a so-called blind plug, which closes the connector opening in the terminal block and prevents tapping. In this embodiment, the normally closed contact springs in the terminal strip are not touched, since the extensions 6b on the spring tongues 5 of the isolating plug according to FIGS. 1 to 3 are missing. The central guide web 3 runs parallel to the two spring tongues 5 at a certain intermediate distance and has a narrower end part with spherical guide surfaces, which merges into a wider guide part via inclined surfaces. This guide web 3 serves to guide the blind plug 1 when it is inserted into the opening provided in the terminal strip, which can be done either by hand or with the aid of a tool which engages in the opening.

Claims (3)

1. Dummy plug or infinity plug for protecting or opening switching contacts in LSA-PLUS terminal strips of telecommunication devices, characterized in that a top grip (4) of the plug (1) is joined by an enlarged central supporting portion (2) the underside of which is provided with two resilient tabs (6) including detents (6), with a central guiding web (3) disposed therebetween, and that the plug (1) is adapted to be inserted into the LSA-PLUS terminal strip and to be locked therein by means of the detents (6).
2. Dummy plug or infinity plug as claimed in claim 1, characterized in that a plurality of centring lugs (8) are integrally formed with the central supporting portion (2).
3. Infinity plug as claimed in claim 1, characterized in that the resilient tabs (5) are provided beneath the detents (6) with extensions (6b) for opening switching contacts in the terminal strip.
EP81103885A 1980-06-19 1981-05-20 Protecting plug for covering a socket or for opening contacts in the socket Expired EP0042495B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81103885T ATE10988T1 (en) 1980-06-19 1981-05-20 DUMMY PLUG OR DISCONNECT PLUG FOR COVERING OR DISCONNECTING SWITCH CONTACTS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8016168U 1980-06-19
DE8016168U DE8016168U1 (en) 1980-06-19 1980-06-19 Plug for LSA-PLUS system to separate the normally closed contacts

Publications (2)

Publication Number Publication Date
EP0042495A1 EP0042495A1 (en) 1981-12-30
EP0042495B1 true EP0042495B1 (en) 1984-12-27

Family

ID=6716387

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81103885A Expired EP0042495B1 (en) 1980-06-19 1981-05-20 Protecting plug for covering a socket or for opening contacts in the socket

Country Status (7)

Country Link
US (1) US4426121A (en)
EP (1) EP0042495B1 (en)
JP (1) JPS5919627B2 (en)
AT (1) ATE10988T1 (en)
AU (1) AU548197B2 (en)
DE (1) DE8016168U1 (en)
GB (1) GB2080032B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202014101030U1 (en) 2014-03-07 2015-06-11 Wago Verwaltungsgesellschaft Mbh Terminal block set, isolating plug and dummy plug for this purpose

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156605B (en) * 1984-03-22 1987-12-23 Porta Systems Corp Telephone connector block
US5013877A (en) * 1988-02-08 1991-05-07 Raychem Corporation Devices for electrical connection
US4927787A (en) * 1989-02-09 1990-05-22 Molex Incorporated Unitarily molded electrical connector housing with separable key
DE4318638A1 (en) * 1993-06-04 1994-12-08 Csp Computer Service Partner G Ring or bus line arrangement with a branch box for stub lines
US5605467A (en) * 1995-01-19 1997-02-25 Eaton Corporation Cover for battery compartment and communications port
US5653602A (en) * 1995-02-22 1997-08-05 Yazaki Corporation Erroneous connection preventing stopping plug
GB2320144B (en) * 1996-12-05 2000-10-25 Egerton A C Ltd Telecommunications apparatus
US5947755A (en) * 1998-03-19 1999-09-07 Conway; Davis R. Electrical outlet safety cap with rotatable prongs
US7652210B2 (en) 2007-07-02 2010-01-26 Socket-Lockits, Inc. Protective electrical outlet cover having integrated positive locking mechanism
US8093497B2 (en) * 2007-07-02 2012-01-10 Socket-Lockits, Inc. Self retained electrical device having positive locking mechanism
ES2576828T3 (en) * 2010-08-13 2016-07-11 Tyco Electronics Amp Italia S.P.A. Finger protection for a 90º head

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE286129C (en) * 1914-03-25
US2239426A (en) * 1939-04-19 1941-04-22 Gen Electric Electric switch
FR1025755A (en) * 1950-10-09 1953-04-20 Forges Ateliers Const Electr Improvements to removable terminals
US4108522A (en) * 1977-05-24 1978-08-22 Bell Telephone Laboratories, Incorporated Jumper plug and socket

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202014101030U1 (en) 2014-03-07 2015-06-11 Wago Verwaltungsgesellschaft Mbh Terminal block set, isolating plug and dummy plug for this purpose

Also Published As

Publication number Publication date
JPS5727583A (en) 1982-02-13
US4426121A (en) 1984-01-17
JPS5919627B2 (en) 1984-05-08
AU7082681A (en) 1981-12-24
GB2080032B (en) 1985-01-30
ATE10988T1 (en) 1985-01-15
AU548197B2 (en) 1985-11-28
DE8016168U1 (en) 1980-09-11
GB2080032A (en) 1982-01-27
EP0042495A1 (en) 1981-12-30

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