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EP2650980B1 - Extension cable - Google Patents

Extension cable Download PDF

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Publication number
EP2650980B1
EP2650980B1 EP13156892.5A EP13156892A EP2650980B1 EP 2650980 B1 EP2650980 B1 EP 2650980B1 EP 13156892 A EP13156892 A EP 13156892A EP 2650980 B1 EP2650980 B1 EP 2650980B1
Authority
EP
European Patent Office
Prior art keywords
socket
plug
housing
cable
fuse
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.)
Active
Application number
EP13156892.5A
Other languages
German (de)
French (fr)
Other versions
EP2650980A2 (en
EP2650980A3 (en
Inventor
Frank Ritter
Michael Ritter
Michael Bohlig
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.)
Rev Ritter GmbH
Original Assignee
Rev Ritter 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 Rev Ritter GmbH filed Critical Rev Ritter GmbH
Publication of EP2650980A2 publication Critical patent/EP2650980A2/en
Publication of EP2650980A3 publication Critical patent/EP2650980A3/en
Application granted granted Critical
Publication of EP2650980B1 publication Critical patent/EP2650980B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/68—Structural association with built-in electrical component with built-in fuse
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
    • H01R25/003—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits the coupling part being secured only to wires or cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R31/00—Coupling parts supported only by co-operation with counterpart
    • H01R31/06—Intermediate parts for linking two coupling parts, e.g. adapter
    • 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
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/713—Structural association with built-in electrical component with built-in switch the switch being a safety switch
    • H01R13/7132—Structural association with built-in electrical component with built-in switch the switch being a safety switch having ejecting mechanisms
    • 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
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H01R13/713—Structural association with built-in electrical component with built-in switch the switch being a safety switch
    • H01R13/7137—Structural association with built-in electrical component with built-in switch the switch being a safety switch with thermal interrupter

Definitions

  • the invention relates to an extension cord, in particular an extension cord for socket outlets with earthing contact.
  • Extension cords such as those used in the home and in the commercial sector, are known. These are in particular extension cords for socket systems with earthing contact plugs, in particular plugs of type F or CEE 7/4.
  • Extension cords typically include a plug that is connected to an outlet or power strip by a flexible cord. With such extension cords, a socket outlet can be provided at a desired location. If a power strip is used, it can also be used to increase the number of sockets in order to be able to connect multiple devices.
  • the disadvantage is that the socket on the wall is blocked by the plug of the extension cable and no more devices can be plugged in at this point.
  • adapters In order to provide a number of connections at a socket, adapters are also known which can be inserted into a socket and have a number of connection sockets. If an extension is now required at the same time, it is now conceivable to plug an extension cable into the adapter.
  • adapters and extension cords are not permissible and can lead to dangers, in particular due to the fact that a large number of current consumers with high current consumption can be connected to one socket.
  • the document DE 20 2010 012 018 U1 shows an extension cord with a plug which has a socket on the back.
  • the document GB 2 456 793 A shows a power supply with a power supply unit that has a socket on the back.
  • U.S. 2002/0127917 A1 shows a connector with an overload protection, which includes a bimetallic contact.
  • document U.S. 5,844,765 shows a plug with a protection circuit.
  • the invention is based on the object of at least reducing the aforementioned disadvantages of the prior art.
  • the invention relates to an extension cable which is designed as an extension cable for a socket outlet with earthing contact, in particular of the F-type plug.
  • the extension cord includes a plug.
  • this plug In the case of socket outlets with earthing contact, this plug usually has two connection contacts, namely phase and neutral, and a grounded protective conductor.
  • the plug includes a housing which is formed from a dielectric material such as a plastic and in which the current-carrying contacts and the protective conductor are held.
  • a flexible cable is inserted into this housing, with which the contacts of the plug are connected.
  • a socket is also provided on the other side of the cable.
  • This usually also has a dielectric housing into which the cable is inserted.
  • the two housings are preferably connected directly to one another via the cable, such that the connection cannot be separated without opening one of the two housings.
  • a further socket is arranged in the housing of the plug.
  • the socket of the extension cable is therefore designed as a through socket and includes a socket that allows other devices to be plugged in at the point of the wall socket into which the extension cable is inserted.
  • the further socket is preferably arranged on a side opposite the plug, the plug-in position is therefore the same.
  • the integration of the socket in the housing of the plug prevents unwanted cascading of an adapter with an extension cable.
  • the first socket ie the socket which sits at the outer end of the extension cord, is part of a power strip. Consequently, the extension cable is not only used for an extension while at the same time preserving the space of the wall socket, but as a multiple socket to plug in several devices.
  • overload protection is arranged in the housing of the plug.
  • the overload protection can be designed as a fuse or circuit breaker.
  • the overload protection is designed as a fuse, in particular as a glass tube fuse.
  • Such a fuse has a compact design and can be integrated in the housing of the connector without the size of the housing changing significantly.
  • the overload protection ensures, particularly in the case of impermissible cascading of the extension cable, that there is no risk of overheating of the extension cable itself or the house-side lines and/or contacts due to excessive current flow.
  • the overload protection is arranged both in front of the socket at the end of the extension cable and in front of the other socket, which is integrated in the housing of the plug.
  • the overload protection is preferably accessible via a side of the housing on which the plug is arranged.
  • the overload protection in particular the fuse, is no longer accessible. Manipulation of the overload protection is thus prevented as long as the extension cable is plugged in.
  • An overload protection designed as a safety fuse can be arranged in particular behind a cover made of a dielectric material.
  • the cover can contain a window, which in particular enables a view of the transparent part of a glass tube fuse. Since the fuse is made of a dielectric material in this area, the window can be designed as a simple opening.
  • the cover has a holder for the fuse, so that the fuse is removed together with the cover when the cover is removed. This prevents the cover from being removed individually, i.e. without the fuse, which could lead to live areas of the fuse, such as the contacts, becoming accessible.
  • a thermal fuse is arranged in the housing of the through socket as overload protection.
  • the thermal fuse can preferably be reset using a reset mechanism.
  • a reset pin is provided.
  • the resetting mechanism is preferably arranged on the plug-side side of the through-type socket. This reduces the risk of manipulation to prevent or delay triggering of the thermal fuse.
  • Thermal fuses as such are known. As a rule, these have a bimetallic strip which, in the case of resettable thermal fuses, is used to initiate a switching operation is triggered, which can only be reversed by the user after the bimetallic strip has cooled, so that an electrical connection can be established again.
  • the thermal switch has the advantage that the user does not need a spare part. Rather, the function of the extension cord can be restored by resetting the thermal fuse.
  • a mains filter is integrated in the housing of the connector in order to block unwanted frequencies.
  • At least the socket in the housing of the plug is surrounded by a plug-in protection that blocks the insertion of a housing with larger dimensions than a plug itself.
  • sections of the socket are surrounded by a web.
  • FIG. 1 shows a perspective view of an embodiment of an extension cord 1, as it is not the subject of the invention.
  • the extension cord includes a line 2 and a socket 3, which is designed as a safety socket.
  • the extension cord is connected to an existing socket in a wall, for example.
  • the socket is designed as a pass-through socket 4 and includes on the opposite side of the plug 5 another socket 6, which is connected to the socket 3 in parallel.
  • the pass-through socket 4 includes overload protection, as will be explained in more detail below.
  • Figure 12 shows another perspective view of an embodiment of the invention.
  • the housing 9 of the pass-through socket 4 can be seen.
  • the power strip 7 includes three sockets 3a, 3b, 3c.
  • the power strip can include a higher or lower number of sockets.
  • the power strip 7 also includes a power switch 8 with which the devices plugged into the power strip 7 can be switched off.
  • the housing of the power strip 7 and the housing 9 of the through-socket 4 are inseparably connected to each other via the line 2, so they cannot be separated from one another without opening or breaking open one of the two housings with a tool.
  • FIG 3 shows a perspective view of the in 1 and 2 shown pass-through socket 4, which is connected via line 2.
  • the housing consists of a lower housing part 13 and an upper housing part 10. These two components can be screwed. However, it is also conceivable to weld or glue the housing parts to one another.
  • a cover 11 is arranged adjacent to the plug 5 and has a viewing window 13 which provides a view of a safety fuse.
  • the safety fuse located behind the cover 11 serves as overload protection and can be designed for a maximum continuous load of 16 A, for example.
  • the cover 11 is no longer accessible. It is thus ensured that the cover 11 can only be manipulated in the de-energized state.
  • FIG 4 shows another perspective view of the pass-through socket, in which the housing is hidden.
  • the contact pin 17 is connected to the contact 18 via the fuse 14 .
  • the fuse 14 sits in a fuse holder 15, which is arranged below the components of the safety socket and via the in 3 cover shown is accessible.
  • the fuse holder 15 sits between the contact pins of the plug and a strain relief 16.
  • a child safety device 23 is integrated into the housing, via which the
  • Passage openings for the contacts of the plug to be used are closed and only released when a contact pin is inserted on both sides at the same time.
  • the basic structure of such a child safety device 23 is known to those skilled in the art.
  • figure 5 shows a further detailed view of the overload protection.
  • a base plate 19 made of metal can be seen.
  • the base plate 19 has contact terminals 21 and 22 via which it is connected on one side via a line 20 to the contact pin and on the other side to the contact of the socket.
  • Fig. 6 shows a further perspective detailed view of the pass-through socket, in which now only the housing but not the cover is hidden.
  • the two contacts 26, 27 of the fuse holder designed as spring contacts can be seen.
  • the cover 11 has a holder 25 for the fuse 14 .
  • the holder 25 is essentially provided as a recess adapted to the fuse 14 .
  • Fig. 7 shows another perspective view of the through socket 4.
  • Fig. 8 shows a view of the through socket.
  • a plug-in protection 24 is arranged on the wall side of the socket 6 in the form of a web running approximately halfway around the socket 6.
  • the plug-in protection prevents components with a larger housing than a normal plug from being plugged in.
  • the pass-through socket shown above cannot itself be plugged into another pass-through socket, which further improves security since impermissible cascading is prevented.
  • Fig. 9 shows a through-type socket, which in terms of structure is essentially that in Figures 1 to 3 illustrated pass-through socket corresponds.
  • a thermal fuse 28 is integrated into the housing 9 of the through socket 4 instead of a safety fuse.
  • a rear half of the housing is hidden in the view according to FIG. 9 for better visibility.
  • the thermal fuse 28 has a reset pin 29 as a reset means, which protrudes on the plug side from the housing 9 of the through socket 4 at least in the tripped state.
  • the user can push the reset pin 29 back into the housing and thus restore the function of the extension cable.
  • thermal fuse makes it possible to design the extension cable more conveniently than the fuse mentioned at the outset.
  • the invention made it possible to provide a simply and securely constructed safety cable, in which the socket on the wall is not blocked.

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  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Insulated Conductors (AREA)

Description

Gebiet der Erfindungfield of invention

Die Erfindung betrifft ein Verlängerungskabel, insbesondere ein Verlängerungskabel für Schutzkontaktsteckdosen.The invention relates to an extension cord, in particular an extension cord for socket outlets with earthing contact.

Hintergrund der ErfindungBackground of the Invention

Verlängerungskabel, wie diese im Haushalt und gewerblichen Bereich verwendet werden, sind bekannt. Es handelt sich dabei insbesondere um Verlängerungskabel für Schutzkontaktstecker-Steckdosensysteme, insbesondere vom Stecker-Typ F bzw. CEE 7/4.Extension cords, such as those used in the home and in the commercial sector, are known. These are in particular extension cords for socket systems with earthing contact plugs, in particular plugs of type F or CEE 7/4.

Der grundsätzliche Aufbau derartiger Schutzkontaktsteckdosensysteme ist dem Fachmann bekannt.The basic structure of such protective contact socket systems is known to those skilled in the art.

Verlängerungskabel umfassen in der Regel einen Stecker, der über ein flexibles Kabel mit einer Steckdose oder Steckdosenleiste verbunden ist. Mit derartigen Verlängerungskabeln kann ein Steckdosenanschluss an einer gewünschten Stelle zur Verfügung gestellt werden. Im Falle der Verwendung einer Steckdosenleiste kann diese zudem auch dazu dienen, die Zahl der Steckdosen zu erhöhen, um mehrere Geräte anschließen zu können.Extension cords typically include a plug that is connected to an outlet or power strip by a flexible cord. With such extension cords, a socket outlet can be provided at a desired location. If a power strip is used, it can also be used to increase the number of sockets in order to be able to connect multiple devices.

Nachteilig ist, dass durch den Stecker des Verlängerungskabels die wandseitige Steckdose blockiert ist und an dieser Stelle kein Gerät mehr eingesteckt werden kann.The disadvantage is that the socket on the wall is blocked by the plug of the extension cable and no more devices can be plugged in at this point.

Um an einer Steckdose mehrere Anschlüsse bereitzustellen, sind darüber hinaus Adapter bekannt, die sich in eine Steckdose einsetzen lassen und mehrere Anschlussdosen aufweisen. Wird nunmehr gleichzeitig eine Verlängerung benötigt, ist nunmehr denkbar, in den Adapter ein Verlängerungskabel einzustecken. Eine derartige Kaskadierung von Adaptern und Verlängerungskabeln ist aber nicht zulässig und kann insbesondere aufgrund der Tatsache, dass eine Mehrzahl von Stromverbrauchern mit hohem Stromverbrauch an einer Steckdose angeschlossen werden können, zu Gefahren führen.In order to provide a number of connections at a socket, adapters are also known which can be inserted into a socket and have a number of connection sockets. If an extension is now required at the same time, it is now conceivable to plug an extension cable into the adapter. However, such a cascading of adapters and extension cords is not permissible and can lead to dangers, in particular due to the fact that a large number of current consumers with high current consumption can be connected to one socket.

Das Dokument DE 20 2010 012 018 U1 zeigt eine Verlängerungsleitung mit einem Stecker, welcher rückseitig eine Steckdose aufweist. Das Dokument GB 2 456 793 A zeigt eine Stromversorgung mit einem Netzgerät, das rückseitig eine Steckdose aufweist. Das DokumentThe document DE 20 2010 012 018 U1 shows an extension cord with a plug which has a socket on the back. The document GB 2 456 793 A shows a power supply with a power supply unit that has a socket on the back. The document

US 2002/0127917 A1 zeigt eine Steckverbindung mit einer Überlastsicherung, die einen Bimetallkontakt umfasst. Dokument US 5,844,765 zeigt einen Stecker mit einer Schutzschaltung. U.S. 2002/0127917 A1 shows a connector with an overload protection, which includes a bimetallic contact. document U.S. 5,844,765 shows a plug with a protection circuit.

Aufgabe der Erfindungobject of the invention

Der Erfindung liegt demgegenüber die Aufgabe zugrunde, die vorstehend genannten Nachteile des Standes der Technik zumindest zu reduzieren.In contrast, the invention is based on the object of at least reducing the aforementioned disadvantages of the prior art.

Es ist insbesondere eine Aufgabe der Erfindung, ein einfach aufgebautes und sicheres Verlängerungskabel bereitzustellen, bei welchem die Steckdose, in welche das Verlängerungskabel eingesteckt wird, nicht blockiert wird.It is a particular object of the invention to provide an extension cord of simple construction and safety in which the outlet into which the extension cord is plugged does not become blocked.

Zusammenfassung der ErfindungSummary of the Invention

Die Erfindung wird bereits durch ein Verlängerungskabel nach Anspruch 1 gelöst.The invention is already solved by an extension cable according to claim 1.

Bevorzugte Ausführungsformen und Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.Preferred embodiments and developments of the invention are the subject matter of the dependent claims.

Die Erfindung betrifft ein Verlängerungskabel, welches als Verlängerungskabel für eine Schutzkontaktsteckdose, insbesondere vom Stecker-Typ F, ausgebildet ist.The invention relates to an extension cable which is designed as an extension cable for a socket outlet with earthing contact, in particular of the F-type plug.

Das Verlängerungskabel umfasst einen Stecker. Bei Schutzkontaktsteckdosen umfasst dieser Stecker üblicherweise zwei Anschlusskontakte, nämlich Phase und Null sowie einen geerdeten Schutzleiter.The extension cord includes a plug. In the case of socket outlets with earthing contact, this plug usually has two connection contacts, namely phase and neutral, and a grounded protective conductor.

Der Stecker umfasst ein Gehäuse, welches aus einem dielektrischen Material wie einem Kunststoff ausgebildet ist und in welchem die stromführenden Kontakte sowie der Schutzleiter gehalten sind.The plug includes a housing which is formed from a dielectric material such as a plastic and in which the current-carrying contacts and the protective conductor are held.

In dieses Gehäuse ist ein biegsames Kabel eingeführt, mit dem die Kontakte des Steckers angeschlossen sind.A flexible cable is inserted into this housing, with which the contacts of the plug are connected.

Um als Verlängerungskabel diesen zu können, ist ferner auf der anderen Seite des Kabels eine Steckdose vorgesehen. Diese hat üblicherweise ebenfalls ein dielektrisches Gehäuse, in welches das Kabel eingeführt ist.In order to be able to use this as an extension cable, a socket is also provided on the other side of the cable. This usually also has a dielectric housing into which the cable is inserted.

Vorzugsweise sind die beiden Gehäuse über das Kabel direkt miteinander verbunden, derart dass die Verbindung nicht getrennt werden kann, ohne eines der beiden Gehäuse zu öffnen.The two housings are preferably connected directly to one another via the cable, such that the connection cannot be separated without opening one of the two housings.

Gemäß der Erfindung ist in dem Gehäuse des Steckers eine weitere Steckdose angeordnet.According to the invention, a further socket is arranged in the housing of the plug.

Die Steckdose des Verlängerungskabels ist mithin als Durchgangssteckdose ausgebildet und umfasst eine Steckdose, die ermöglicht, dass an der Stelle der Wandsteckdose, in welche das Verlängerungskabel eingesetzt wird, weiter Geräte eingesteckt werden können.The socket of the extension cable is therefore designed as a through socket and includes a socket that allows other devices to be plugged in at the point of the wall socket into which the extension cable is inserted.

Vorzugsweise ist die weitere Steckdose auf einer dem Stecker gegenüberliegenden Seite angeordnet, die Einsteckposition ist mithin dieselbe.The further socket is preferably arranged on a side opposite the plug, the plug-in position is therefore the same.

Durch die Integration der Steckdose in das Gehäuse des Steckers wird eine ungewollte Kaskadierung eines Adapters mit einem Verlängerungskabel verhindert.The integration of the socket in the housing of the plug prevents unwanted cascading of an adapter with an extension cable.

Gemäß der Erfindung ist die erste Steckdose, also die Steckdose welche am äußeren Ende des Verlängerungskabels sitzt, Teil einer Steckdosenleiste. Mithin dient das Verlängerungskabel nicht alleine einer Verlängerung bei gleichzeitiger Erhaltung des Platzes der Wandsteckdose, sondern als Mehrfachsteckdose, um mehrere Geräte einzustecken.According to the invention, the first socket, ie the socket which sits at the outer end of the extension cord, is part of a power strip. Consequently, the extension cable is not only used for an extension while at the same time preserving the space of the wall socket, but as a multiple socket to plug in several devices.

Bei einer Weiterbildung der Erfindung ist in dem Gehäuse des Steckers ein Überlastschutz angeordnet.In a further development of the invention, overload protection is arranged in the housing of the plug.

Der Überlastschutz kann als Sicherung oder Sicherungsautomat ausgebildet sein.The overload protection can be designed as a fuse or circuit breaker.

Bei einer Ausführungsform, die nicht Teil der Erfindung ist, ist der Überlastschutz als Schmelzsicherung ausgebildet, insbesondere als Glasrohrsicherung.In an embodiment which is not part of the invention, the overload protection is designed as a fuse, in particular as a glass tube fuse.

Eine derartige Schmelzsicherung hat eine kompakte Bauform und kann im Gehäuse des Steckers integriert werden, ohne dass sich die Größe des Gehäuses wesentlich ändert.Such a fuse has a compact design and can be integrated in the housing of the connector without the size of the housing changing significantly.

Über den Überlastschutz wird insbesondere bei unzulässiger Kaskadierung des Verlängerungskabels sichergestellt, dass nicht aufgrund eines zu großen Stromflusses die Gefahr von Überhitzungen des Verlängerungskabels selbst oder der hausseitigen Leitungen und/oder Kontakte eintritt.The overload protection ensures, particularly in the case of impermissible cascading of the extension cable, that there is no risk of overheating of the extension cable itself or the house-side lines and/or contacts due to excessive current flow.

Der Überlastschutz ist stromseitig sowohl vor der Steckdose am Ende des Verlängerungskabels als auch vor der weiteren Steckdose, die in dem Gehäuse des Steckers integriert ist, angeordnet.On the current side, the overload protection is arranged both in front of the socket at the end of the extension cable and in front of the other socket, which is integrated in the housing of the plug.

Vorzugsweise ist der Überlastschutz über eine Gehäuseseite zugänglich, auf welcher der Stecker angeordnet ist.The overload protection is preferably accessible via a side of the housing on which the plug is arranged.

Sofern nunmehr der Stecker in die Wanddose eingesetzt ist, ist der Überlastschutz, insbesondere die Schmelzsicherung nicht mehr zugänglich. Ein Manipulieren am Überlastschutz wird also verhindert, solange das Verlängerungskabel eingesteckt ist.If the plug is now inserted into the wall socket, the overload protection, in particular the fuse, is no longer accessible. Manipulation of the overload protection is thus prevented as long as the extension cable is plugged in.

Ein als Schmelzsicherung ausgestalteter Überlastschutz kann insbesondere hinter einer Abdeckung aus einem dielektrischen Material angeordnet sein. Die Abdeckung kann ein Fenster enthalten, welches insbesondere Sicht auf den transparenten Teil einer Glasrohrsicherung ermöglicht. Da in diesem Bereich die Schmelzsicherung aus einem dielektrischen Material ausgebildet ist, kann das Fenster als einfache Öffnung ausgebildet sein.An overload protection designed as a safety fuse can be arranged in particular behind a cover made of a dielectric material. The cover can contain a window, which in particular enables a view of the transparent part of a glass tube fuse. Since the fuse is made of a dielectric material in this area, the window can be designed as a simple opening.

Bei einer Weiterbildung weist die Abdeckung einen Halter für die Schmelzsicherung auf, so dass die Schmelzsicherung beim Entfernen der Abdeckung zusammen mit der Abdeckung mit entfernt wird. So wird verhindert, dass die Abdeckung einzeln, d.h. ohne die Schmelzsicherung entfernt werden kann, was unter Umständen dazu führen könnte, dass stromführende Bereiche der Schmelzsicherung, wie die Kontakte, zugänglich sind.In a further development, the cover has a holder for the fuse, so that the fuse is removed together with the cover when the cover is removed. This prevents the cover from being removed individually, i.e. without the fuse, which could lead to live areas of the fuse, such as the contacts, becoming accessible.

Gemäß der Erfindung ist als Überlastsicherungsschutz eine Thermosicherung im Gehäuse der Durchgangssteckdose angeordnet.According to the invention, a thermal fuse is arranged in the housing of the through socket as overload protection.

Die Thermosicherung ist vorzugsweise über einen Rückstellmechanismus rückstellbar. Insbesondere ist ein Rückstellstift vorgesehen. Vorzugsweise ist der Rückstellmechanismus auf der steckerseitigen Seite der Durchgangssteckdose angeordnet. So ist die Gefahr von Manipulationen, um das Auslösen der Thermosicherung zu verhindern oder zu verzögern, geringer.The thermal fuse can preferably be reset using a reset mechanism. In particular, a reset pin is provided. The resetting mechanism is preferably arranged on the plug-side side of the through-type socket. This reduces the risk of manipulation to prevent or delay triggering of the thermal fuse.

Thermosicherungen als solche sind bekannt. Diese verfügen in der Regel über einen Bimetallstreifen mittels dessen bei rückstellbaren Thermosicherungen ein Schaltvorgang ausgelöst wird, der erst nach Abkühlen des Bimetallstreifens durch den Benutzer rückgängig gemacht werden kann, so dass wieder eine elektrische Verbindung herstellbar ist.Thermal fuses as such are known. As a rule, these have a bimetallic strip which, in the case of resettable thermal fuses, is used to initiate a switching operation is triggered, which can only be reversed by the user after the bimetallic strip has cooled, so that an electrical connection can be established again.

Gegenüber der vorstehend erwähnten Schmelzsicherung hat der Thermoschalter den Vorteil, dass der Benutzer kein Ersatzteil benötigt. Vielmehr kann die Funktion des Verlängerungskabels durch Rücksetzen der Thermosicherung wiederhergestellt werden.Compared to the fuse mentioned above, the thermal switch has the advantage that the user does not need a spare part. Rather, the function of the extension cord can be restored by resetting the thermal fuse.

Bei einer Weiterbildung der Erfindung ist in dem Gehäuse des Steckers ein Netzfilter integriert, um unerwünschte Frequenzen zu blockieren.In a further development of the invention, a mains filter is integrated in the housing of the connector in order to block unwanted frequencies.

Weiter ist denkbar in dem Gehäuse des Steckers einen Überspannungsschutz zu integrieren.It is also conceivable to integrate overvoltage protection in the housing of the plug.

Gemäß der Erfindung ist zumindest die Steckdose im Gehäuse des Steckers, mit einem Einsteckschutz umgeben, der das Einstecken eines Gehäuses mit größeren Abmessungen als ein Stecker selbst blockiert.According to the invention, at least the socket in the housing of the plug is surrounded by a plug-in protection that blocks the insertion of a housing with larger dimensions than a plug itself.

Im einfachsten Fall ist hierzu die Steckdose abschnittsweise mit einem Steg umgeben.In the simplest case, sections of the socket are surrounded by a web.

Wenn man ein etwas größeres Gehäuse, wie beispielsweise das vorstehend erwähnte Gehäuse mit einem Überlastschutz oder eine Zeitschaltuhr oder einen Adapter mit mehreren Steckdosen, versucht in das Gehäuse einzustecken, ist dieses aufgrund der größeren Gehäusemaße nicht möglich, da das Gehäuse am Steg anstößt.If you try to plug a slightly larger case, such as the case mentioned above with an overload protection or a timer or a multi-socket adapter into the case, this is not possible due to the larger case dimensions as the case hits the bridge.

So kann in vielen Fällen eine unzulässige Kaskadierung, insbesondere von mehreren Verlängerungskabeln, untereinander verhindert werden.In many cases, this can prevent impermissible cascading, especially of several extension cables.

Beschreibung der ZeichnungenDescription of the drawings

Die Erfindung soll im Folgenden Bezug nehmend auf die Zeichnungen Fig. 1 bis Fig. 8 anhand schematisch dargestellter Ausführungsbeispiele näher erläutert werden.The invention shall in the following be referred to the drawings Figures 1 to 8 are explained in more detail with reference to exemplary embodiments shown schematically.

Fig. 1 zeigt eine perspektivische Ansicht eines Ausführungsbeispiels eines Verlängerungskabels 1, wie es nicht Gegenstand der Erfindung ist. 1 shows a perspective view of an embodiment of an extension cord 1, as it is not the subject of the invention.

Das Verlängerungskabel umfasst eine Leitung 2 sowie eine Steckdose 3, welche als Schutzkontaktsteckdose ausgebildet ist.The extension cord includes a line 2 and a socket 3, which is designed as a safety socket.

Mittels eines Steckers 5 wird das Verlängerungskabel beispielsweise an einer in einer Wand vorhandenen Steckdose angeschlossen werden.By means of a plug 5, the extension cord is connected to an existing socket in a wall, for example.

Die Steckdose ist als Durchgangssteckdose 4 ausgebildet und umfasst auf der dem Stecker 5 gegenüberliegenden Seite eine weitere Steckdose 6, welche mit der Steckdose 3 parallel geschaltet ist.The socket is designed as a pass-through socket 4 and includes on the opposite side of the plug 5 another socket 6, which is connected to the socket 3 in parallel.

Durch die weitere Steckdose 6 ist wandseitig weiterhin eine Steckdose vorhanden.Due to the additional socket 6, a socket is still available on the wall side.

Die Durchgangssteckdose 4 umfasst einen Überlastschutz, wie im Folgenden noch näher erläutert wird.The pass-through socket 4 includes overload protection, as will be explained in more detail below.

Fig. 2 zeigt eine weitere perspektivische Ansicht eines Ausführungsbeispiels der Erfindung. 2 Figure 12 shows another perspective view of an embodiment of the invention.

Zu erkennen ist das Gehäuse 9 der Durchgangssteckdose 4.The housing 9 of the pass-through socket 4 can be seen.

Dieses ist über ein Kabel 2 mit einer Steckdosenleiste 7 verbunden.This is connected to a socket strip 7 via a cable 2 .

In diesem Ausführungsbeispiel umfasst die Steckdosenleiste 7 drei Steckdosen 3a, 3b, 3c. Es versteht sich aber auch, dass die Steckdosenleiste eine höhere oder niedrigere Anzahl an Steckdosen umfassen kann.In this embodiment, the power strip 7 includes three sockets 3a, 3b, 3c. However, it is also understood that the power strip can include a higher or lower number of sockets.

Die Steckdosenleiste 7 umfasst des Weiteren einen Netzschalter 8, mit welchem die in die Steckdosenleiste 7 eingesteckten Geräte stromlos geschaltet werden können.The power strip 7 also includes a power switch 8 with which the devices plugged into the power strip 7 can be switched off.

Das Gehäuse der Steckdosenleiste 7 sowie das Gehäuse 9 der Durchgangssteckdose 4 sind über die Leitung 2 untrennbar miteinander verbunden, können also nicht voneinander getrennt werden, ohne eines der beiden Gehäuse mit einem Werkzeug zu öffnen oder aufzubrechen.The housing of the power strip 7 and the housing 9 of the through-socket 4 are inseparably connected to each other via the line 2, so they cannot be separated from one another without opening or breaking open one of the two housings with a tool.

Fig. 3 zeigt eine perspektivische Ansicht auf die in Fig. 1 und Fig. 2 dargestellte Durchgangssteckdose 4, welche über die Leitung 2 angeschlossen ist. 3 shows a perspective view of the in 1 and 2 shown pass-through socket 4, which is connected via line 2.

In dieser Ansicht ist das steckerseitige Ende der Durchgangssteckdose 4 mit dem Stecker 5 gezeigt.In this view, the plug-side end of the through socket 4 with the plug 5 is shown.

Das Gehäuse besteht aus einem Gehäuseunterteil 13 und einem Gehäuseoberteil 10. Diese beiden Bauteile können verschraubt sein. Denkbar ist aber auch, die Gehäuseteile miteinander zu verschweißen oder zu verkleben.The housing consists of a lower housing part 13 and an upper housing part 10. These two components can be screwed. However, it is also conceivable to weld or glue the housing parts to one another.

Benachbart zum Stecker 5 ist eine Abdeckung 11 angeordnet, die ein Sichtfenster 13 aufweist, welches Sicht auf eine Schmelzsicherung freigibt.A cover 11 is arranged adjacent to the plug 5 and has a viewing window 13 which provides a view of a safety fuse.

Die hinter der Abdeckung 11 sitzende Schmelzsicherung dient als Überlastschutz, kann beispielsweise für eine maximale Dauerlast von 16 A ausgelegt sein.The safety fuse located behind the cover 11 serves as overload protection and can be designed for a maximum continuous load of 16 A, for example.

Ist nun der Stecker 5 wandseitig eingesteckt, ist die Abdeckung 11 nicht mehr zugänglich. Es ist somit sichergestellt, dass an der Abdeckung 11 nur im stromlosen Zustand manipuliert werden kann.If the plug 5 is now plugged into the wall, the cover 11 is no longer accessible. It is thus ensured that the cover 11 can only be manipulated in the de-energized state.

Fig. 4 zeigt eine weitere perspektivische Ansicht der Durchgangssteckdose, bei welcher das Gehäuse ausgeblendet ist. 4 shows another perspective view of the pass-through socket, in which the housing is hidden.

Der Kontaktstift 17 ist über die Schmelzsicherung 14 mit dem Kontakt 18 verbunden.The contact pin 17 is connected to the contact 18 via the fuse 14 .

Die Schmelzsicherung 14 sitzt in einem Sicherungshalter 15, welcher unterhalb der Komponenten der Schutzkontaktsteckdose angeordnet und über die in Fig. 3 dargestellte Abdeckung zugänglich ist.The fuse 14 sits in a fuse holder 15, which is arranged below the components of the safety socket and via the in 3 cover shown is accessible.

Der Sicherungshalter 15 sitzt zwischen den Kontaktstiften des Steckers und einer Zugentlastung 16.The fuse holder 15 sits between the contact pins of the plug and a strain relief 16.

Im Gehäuse ist in diesem Ausführungsbeispiel eine Kindersicherung 23 integriert über welche dieIn this embodiment, a child safety device 23 is integrated into the housing, via which the

Durchgangsöffnungen für die Kontakte des einzusetzenden Steckers verschlossen sind und erst dann freigegeben werden, wenn auf beiden Seiten gleichzeitig ein Kontaktstift eingeführt wird. Der grundsätzliche Aufbau einer solchen Kindersicherung 23 ist dem Fachmann bekannt.Passage openings for the contacts of the plug to be used are closed and only released when a contact pin is inserted on both sides at the same time. The basic structure of such a child safety device 23 is known to those skilled in the art.

Fig. 5 zeigt eine weitere Detailansicht des Überlastschutzes. figure 5 shows a further detailed view of the overload protection.

Zu erkennen ist eine Grundplatte 19 aus Metall.A base plate 19 made of metal can be seen.

Die Grundplatte 19 verfügt über Kontaktklemmen 21 und 22 über die sie auf einer Seite über eine Leitung 20 mit dem Kontaktstift und auf der anderen Seite mit dem Kontakt der Steckdose verbunden ist.The base plate 19 has contact terminals 21 and 22 via which it is connected on one side via a line 20 to the contact pin and on the other side to the contact of the socket.

Fig. 6 zeigt eine weitere perspektivische Detailansicht der Durchgangssteckdose, in der nunmehr nur das Gehäuse, nicht aber die Abdeckung ausgeblendet ist.Fig. 6 shows a further perspective detailed view of the pass-through socket, in which now only the housing but not the cover is hidden.

Zu erkennen sind die zwei als Federkontakte ausgebildeten Kontakte 26, 27 des Sicherungshalters.The two contacts 26, 27 of the fuse holder designed as spring contacts can be seen.

Die Abdeckung 11 weist einen Halter 25 für die Schmelzsicherung 14 auf.The cover 11 has a holder 25 for the fuse 14 .

Der Halter 25 ist im Wesentlichen als eine der Schmelzsicherung 14 angepasste Aussparung vorgesehen.The holder 25 is essentially provided as a recess adapted to the fuse 14 .

Wird nunmehr die Abdeckung 11 aus dem Gehäuse (ausgeblendet) entfernt, so wird hierbei automatisch auch die Schmelzsicherung 14 entnommen. Es ist mithin nicht möglich, die Abdeckung 11 einzeln zu entfernen, ohne dass hierbei die Schmelzsicherung 14 mit entnommen wird.If the cover 11 is now removed from the housing (hidden), the safety fuse 14 is automatically removed as well. So it isn't possible to remove the cover 11 individually without the fuse 14 being removed as well.

Fig. 7 zeigt eine weitere perspektivische Ansicht der Durchgangssteckdose 4.Fig. 7 shows another perspective view of the through socket 4.

In dieser Ansicht ist die Abdeckung (11 in Fig. 6) zusammen mit der Schmelzsicherung entnommen, so dass nunmehr der Sicherungshalter 15 zu erkennen ist.In this view, the cover (11 in FIG. 6) has been removed together with the safety fuse, so that the fuse holder 15 can now be seen.

Fig. 8 zeigt eine Ansicht der Durchgangssteckdose.Fig. 8 shows a view of the through socket.

Neben einer etwas anderen Form des Gehäuses 9 ist wandseitig an der Steckdose 6 ein Einsteckschutz 24 in Form eines etwa um den halben Umfang der Steckdose 6 laufenden Steges angeordnet.In addition to a slightly different shape of the housing 9, a plug-in protection 24 is arranged on the wall side of the socket 6 in the form of a web running approximately halfway around the socket 6.

Der Einsteckschutz verhindert, dass Bauteile mit einem größeren Gehäuse als ein normaler Stecker eingesteckt werden können.The plug-in protection prevents components with a larger housing than a normal plug from being plugged in.

So kann insbesondere die zuvor dargestellte Durchgangssteckdose selbst nicht in eine andere Durchgangssteckdose eingesteckt werden, was die Sicherheit weiter verbessert, da unzulässige Kaskadierungen verhindert werden.In particular, the pass-through socket shown above cannot itself be plugged into another pass-through socket, which further improves security since impermissible cascading is prevented.

Bezugnehmend auf Fig. 9 und Fig. 10 soll eine Durchgangssteckdose gemäß der Erfindung erläutert werden.Referring to Fig. 9 and Fig. 10, a through socket according to the invention will be explained.

Fig. 9 zeigt eine Durchgangssteckdose, die vom Aufbau her im Wesentlichen der in Fig. 1 bis Fig.3 dargestellten Durchgangssteckdose entspricht.Fig. 9 shows a through-type socket, which in terms of structure is essentially that in Figures 1 to 3 illustrated pass-through socket corresponds.

Im Unterschied zu der in Fig. 4 bis Fig. 7 dargestellten Ausführungsvariante , die nicht Teil der Erfindung ist, ist anstelle einer Schmelzsicherung eine Thermosicherung 28 in das Gehäuse 9 der Durchgangssteckdose 4 integriert. Zur besseren Sichtbarkeit ist in der Ansicht gemäß Fig. 9 eine hintere Gehäusehälfte ausgeblendet.In contrast to the in Figures 4 to 7 illustrated embodiment, which is not part of the invention, a thermal fuse 28 is integrated into the housing 9 of the through socket 4 instead of a safety fuse. A rear half of the housing is hidden in the view according to FIG. 9 for better visibility.

Über die Thermosicherung 28 wird der Strom eines Anschlusses der Steckdose geführt.About the thermal fuse 28, the current of a connection of the socket is performed.

Wie in der Schnittansicht gemäß Fig. 10 zu erkennen, weist die Thermosicherung 28 einen Rückstellstift 29 als Rückstellmittel auf, welcher zumindest im ausgelösten Zustand steckerseitig aus dem Gehäuse 9 der Durchgangssteckdose 4 heraussteht.As can be seen in the sectional view according to FIG. 10, the thermal fuse 28 has a reset pin 29 as a reset means, which protrudes on the plug side from the housing 9 of the through socket 4 at least in the tripped state.

Durch die Thermosicherung 28 wird sowohl die Durchgangssteckdose 4, als auch die an dem Verlängerungskabel angeordnete Steckdose (3 in Fig. 1) bzw. Steckdosenleiste stromlos geschaltet.Through the thermal fuse 28, both the through socket 4 and the socket arranged on the extension cable (3 in 1 ) or power strip switched off.

Nach Beseitigen der Überlast kann der Benutzer den Rückstellstift 29 wieder in das Gehäuse drücken und so die Funktion des Verlängerungskabels wieder herstellen.After eliminating the overload, the user can push the reset pin 29 back into the housing and thus restore the function of the extension cable.

Die Verwendung einer Thermosicherung ermöglicht gegenüber der eingangserwähnten Schmelzsicherung eine komfortablere Ausgestaltung des Verlängerungskabels.The use of a thermal fuse makes it possible to design the extension cable more conveniently than the fuse mentioned at the outset.

Durch die Erfindung konnte ein einfach und sicher aufgebautes Sicherungskabel bereitgestellt werden, bei dem die wandseitige Steckdose nicht blockiert wird.The invention made it possible to provide a simply and securely constructed safety cable, in which the socket on the wall is not blocked.

BezugszeichenlisteReference List

11
Verlängerungskabelextension cable
22
Leitungmanagement
33
Steckdosesocket
44
Durchgangssteckdosepass-through socket
55
Steckerplug
66
Steckdosesocket
77
Steckerleistepower strip
88th
Schaltercounter
99
Gehäusecasing
1010
Gehäuseoberteilhousing top
1111
Abdeckungcover
1212
Sichtfensterviewing window
1313
Gehäuseunterzeitcasing lower time
1414
Schmelzsicherungfuse
1515
Sicherungshalterfuse holder
1616
Zugentlastungstrain relief
1717
Kontaktstiftcontact pin
1818
KontaktContact
1919
Rundplatteround plate
2020
Leitungmanagement
2121
Kontaktklemmecontact clamp
2222
Kontaktklemmecontact clamp
2323
Kindersicherungchild lock
2424
EinsteckschutzfunktionPlug-in protection function
2525
Halterholder
2626
KontaktContact
2727
KontaktContact
2828
Thermosicherungthermal fuse
2929
Rückstellstiftreset pin

Claims (4)

  1. An extension cable (1) for a safety socket, comprising a plug (5), a cable (2), as well as at least one first socket (3), which is connected to the cable and which is part of a socket strip (7), wherein the plug (5) comprises a housing and is connected to the first socket (3) by means of the cable (2) guided into the housing, wherein a further socket (6) is arranged in the housing of the plug (5), and wherein the further socket (6) is arranged on a side located opposite the plug (5), so that the further socket (6) is formed as connector socket (4) and makes it possible that equipment can further be plugged in at the site of a wall socket, into which the extension cable (1) is inserted, characterized in that the socket strip (7) comprises a power switch (8), by means of which equipment plugged into the socket strip can be disconnected from the power supply,
    and that the further socket (6) is surrounded in the housing of the plug (5) with a plug-in protection (24), which blocks the plug-in of a housing with larger dimensions than a plug,
    and wherein the connector socket (4) comprises a housing (9), which consists of a lower housing part (13) and an upper housing part (10), and wherein a thermal fuse (28) is integrated in the housing (9) of the connector socket (4).
  2. The extension cable (1) according to claim 1, characterized in that an overload protection formed as the thermal fuse (28) is formed in the plug (5), wherein the overload protection is accessible via a housing side, on which the plug (5) is arranged, and wherein the overload protection is arranged on the side upstream of the socket at the end of the cable (2) as well as upstream of the further socket (6), which is integrated in the housing of the plug (5), so that the first socket (3) as well as the connector socket (4) can be disconnected from the power supply by means of the overload protection formed as thermal fuse (28) .
  3. The extension cable according to claim 2, characterized in that the thermal fuse (28) can be reset via a resetting element (29), which sticks out from the housing of a connector socket.
  4. The extension cable according to any one of the preceding claims, characterized in that the housing of the plug (5) is connected directly to a housing of the first socket (3) via the cable (2).
EP13156892.5A 2012-04-12 2013-02-27 Extension cable Active EP2650980B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012103164 2012-04-12
DE102012010060 2012-05-23

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Family

ID=47779887

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DE (1) DE102013101922A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5844765A (en) * 1996-10-25 1998-12-01 Hosiden Corporation Power plug with a slidable lid covering a circuit protector reset knob
WO2003010859A1 (en) * 2001-07-24 2003-02-06 Ririe, Ralph, Trevor A domestic electrical distribution device
US20090215319A1 (en) * 2008-02-21 2009-08-27 Hanoz Gandhi Green Power Strip
TWM379790U (en) * 2009-12-16 2010-05-01 J R J Electronic Co Ltd Standby power control device
DE102008059084A1 (en) * 2008-11-26 2010-07-22 Taller Gmbh Fuse-holder used in mains electricity plug, is rotated in plug body between electrically-contacting position and fuse-replacement position

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6461195B2 (en) * 2001-03-12 2002-10-08 Min-Chen Chang Safety electric plug with overcurrent protective means
GB2456793A (en) * 2008-01-23 2009-07-29 Sheng-Fu Lu DC power supply with additional AC socket
DE202008006583U1 (en) * 2008-05-02 2009-06-04 Sp-Electronic Plug-in adapter for contact sockets with protection increase
DE202009011467U1 (en) * 2009-08-22 2010-01-07 Taller Gmbh Power supply plug with sealed fuse box
DE202010012018U1 (en) * 2010-08-31 2010-11-11 Eiselt, Michael Plug / socket combination to power strip / extension cable

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5844765A (en) * 1996-10-25 1998-12-01 Hosiden Corporation Power plug with a slidable lid covering a circuit protector reset knob
WO2003010859A1 (en) * 2001-07-24 2003-02-06 Ririe, Ralph, Trevor A domestic electrical distribution device
US20090215319A1 (en) * 2008-02-21 2009-08-27 Hanoz Gandhi Green Power Strip
DE102008059084A1 (en) * 2008-11-26 2010-07-22 Taller Gmbh Fuse-holder used in mains electricity plug, is rotated in plug body between electrically-contacting position and fuse-replacement position
TWM379790U (en) * 2009-12-16 2010-05-01 J R J Electronic Co Ltd Standby power control device

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DE102013101922A1 (en) 2013-10-17
EP2650980A3 (en) 2014-11-19

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