DE102017102241B4 - Socket extension - Google Patents

Abstract

Socket extension (1) for a protective contact socket, comprising a housing (2) with a plug (15) and at least a plurality of sockets (3), characterized in that the housing (2) has means for fastening the socket extension to the wall, which as a through hole (8) are designed for a screw, so that the housing (2) can be firmly connected to an on-site wall.

Description

Field of invention

The invention relates to a socket extension which makes it possible to divide an existing wall socket into several sockets. In particular, the invention relates to a socket extension for a safety socket, in particular for a socket according to CEE 7/3.

Background of the invention

Socket extensions are known from practice. These are adapters which have a plug, in particular a protective contact plug, as well as several sockets, in particular several protective contact sockets. In contrast to socket strips with an extension cable, in the case of a socket outlet extension the plug is part of the housing in which the sockets are also located. In order to divide a protective contact socket into several sockets, a socket extension is known from practice in which the housing is T-shaped and in which a protective contact socket is designed as an extension of the socket on the wall and the other two sockets up and down demonstrate.

Socket extensions have the advantage over plug strips connected with a cable that the additional sockets are directly accessible on the wall, so that in particular there is no risk of tripping from a cable and, depending on the application, the plugs are more accessible.

The disadvantage of a socket outlet extension is that it can lead to a higher mechanical load on the plug on the wall side when it is plugged in and unplugged. If the socket extension is handled improperly, the wall socket can either be damaged or pulled out of the wall, which in some circumstances can even lead to live components being exposed.

There is also the risk of deformation of the contacts, both the protective conductor and the power contacts. This can result in greater electrical resistances and thus the risk of overheating.

This applies in particular to socket extensions that have multiple safety sockets. The dimensions of such protective contact sockets are larger due to the existing protective conductor and due to the plug standard, in particular according to CEE 7/3, which means that the housing is correspondingly larger and heavier.

The document US 2002/0 019 171 A1 shows a Y-adapter with a screw-together housing. The document DE 1 032 358 B shows a socket extension.

Object of the invention

In contrast, the invention is based on the object of providing a socket outlet extension, in particular a socket outlet extension for protective contact sockets, with improved security.

Summary of the invention

The object of the invention is already achieved by a socket outlet extension according to claim 1.

Preferred embodiments and developments of the invention can be found in the subject matter of the dependent claims, the description and the drawings.

The invention relates to a socket extension. In particular, the invention relates to an extension for a protective contact socket, in particular according to CEE 7/3. The socket outlet extension comprises a housing with a plug, preferably with a protective contact plug, that is to say a plug which is also provided with a grounding conductor.

The housing further comprises at least one, preferably a plurality of sockets, in particular earthed sockets, in particular according to CEE 7/3. Plugs and sockets are therefore not connected via a cable guided out of a housing, but rather part of a common housing which can be constructed in one or more parts.

According to the invention, the housing comprises means for fastening on the wall. These means are designed as a through hole or preferably as a through hole for one screw each.

Thus, the housing of the socket extension can be firmly connected to the on-site wall, which means that torques occurring when plugging in and unplugging are not transferred, or at least only to a small extent, to the wall socket.

According to a further development of the invention, the socket can be electrically connected to the plug via a bolt. The sockets can only be used if they have a latch an electrical connection to the plug is established. A bolt is understood to mean any component with which an electrical connection between the plug and socket can be established.

The latch can only be operated if the socket extension is attached to the wall.

So an electrical connection between the plug and the sockets is only possible if the housing of the socket extension is attached to the wall.

In particular, it is provided that the housing is screwed tightly to the wall, in particular by means of screws that are screwed into a wall-side dowel.

Preferably, the bolt is released by inserting at least one screw for fastening to the wall.

Only when the housing is attached directly to the wall is the bolt released so that an electrical connection can be established. The bolt is preferably operated by the user.

In another embodiment of the invention, however, it is provided that the bolt is automatically actuated when it is fastened to the wall and establishes an electrical connection.

According to a preferred embodiment of the invention, the socket extension comprises at least one locking member which releases the bolt by means of a screw for fastening to the wall.

The blocking element can in particular be a component with a contact surface for the screw. When the screw is screwed in, the screw head comes to rest on the locking member, the locking member moves, in particular with a spring support, in the direction of the wall and thus releases the bolt.

In a further development of the invention, the bolt is connected to two arms, in particular formed in one piece with two arms which each interact with a locking member.

In this embodiment of the invention, the housing of the socket extension must therefore be attached to the wall with at least two screws. One of the arms of the bolt is released via each of the screws so that the bolt can only be actuated when the housing is fastened to the wall with both screws.

In a further development of the invention, the bolt can also be connected to three or more arms, which each interact with a locking member.

In a preferred embodiment of the invention, the bolt latches in an electrically connected state.

After being attached once, the bolt is preferably locked in the housing in such a way that it can no longer be moved back without opening the housing or a cover connected to the housing. This ensures after installation that the power supply is not accidentally interrupted again.

In one embodiment of the invention, the bolt is connected to a contact pin carrier which comprises a contact pin for closing an electrical contact for connecting the socket to the plugs.

A switch is thus formed in a simple manner via the bolt and a contact pin, which makes the electrical connection when the bolt is actuated.

In particular, it is provided that the bolt comprises two arms which lead to two locking elements, the contact pin carrier being designed as a third arm which is present between the two arms which lead to the locking elements. In this way, a component can be provided in a simple and compact manner, which simultaneously actuates a switch and interacts with a blocking element.

The bolt is designed in particular as a slide which protrudes from the housing in the disconnected state. In the connected state, the bolt is preferably flush with the housing. The housing does not differ from a housing without the safety device according to the invention.

In a further preferred embodiment of the invention, at least one screw feed-through is accessible via a removable cover. In particular, at least two screw feedthroughs are accessible via a coverable frame.

The cover is preferably designed in such a way that no live components are exposed when the cover is removed, so that only the screw feedthroughs are accessible for assembly. When the screws are screwed in, the latch is released and an electrical connection can be established. Then the housing with the cover, in particular with the Frame, completely closed so that the screws are no longer accessible.

In a further development of the invention, the housing comprises at least one wall-side spacer spaced from the plug. Due to the spacer, the socket of the socket extension is approximately level with the wall socket so that the housing of the socket extension does not become inclined, which could lead to the contacts being bent.

The spacer protrudes from the housing on the wall side and bridges the distance between the underside of the housing and the wall, which corresponds to the height of the socket cover provided on the wall.

Since the housing is fastened, in particular screwed, next to the socket on the wall side, the housing rests directly against the wall via the spacer.

The spacer itself preferably comprises a screw feed-through. In this way, the housing is pressed directly onto the spacer and there is no risk of the housing becoming distorted when a screw is screwed in.

In a further development of the invention, the socket outlet extension comprises a USB power connection, an overvoltage protection device and / or a switch.

The socket outlet extension preferably comprises at least two, particularly preferably at least three and very particularly preferably at least four socket outlets.

The sockets of the socket extension are preferably on the side of the housing opposite the plug. In the assembled state, the direction of insertion is identical to that of the socket on the wall, which improves the accessibility of the sockets.

In a plan view, in one embodiment of the invention, the plug is outside the area of the sockets. In this way, a flat design of the housing of the socket outlet extension can be made possible, since the installation spaces of socket outlets and plugs can lie next to one another.

In another embodiment of the invention, in particular in an embodiment with three sockets, the plug and socket can also be opposite one another, in particular directly opposite one another.

Figure list

• 1 ist eine perspektivische Ansicht einer Steckdosenerweiterung.
• 2 ist eine Draufsicht auf die Steckdosenerweiterung, wobei ein als Abdeckung dienender Rahmen abgenommen ist.
• 3 und 4 sind Draufsichten auf eine Steckdosenerweiterung mit ausgeblendetem Gehäuseoberteil.
• 5a ist eine aufgeschnittene perspektivische Ansicht einer Steckdosenerweiterung.
• 5b ist eine Detailansicht der 5a, in welcher das Sperrorgan gut zu erkennen ist.
• 6 ist eine aufgeschnittene Seitenansicht der Steckdosenerweiterung.

The subject matter of the invention will hereinafter be referred to in the drawings 1 to 6th illustrated embodiment of the invention are explained.

• 1 Figure 13 is a perspective view of a receptacle extension.
• 2 Figure 4 is a top plan view of the receptacle extension with a cover frame removed.
• 3 and 4th are top views of a socket outlet with the upper part of the housing hidden.
• 5a Figure 3 is a cut away perspective view of a receptacle extension.
• 5b is a detailed view of the 5a , in which the locking device can be easily recognized.
• 6th Figure 3 is a cut-away side view of the receptacle extension.

Detailed description of the drawings

1 Figure 3 is a perspective view of one embodiment of a receptacle extension according to the invention 1 .

The socket extension 1 includes a housing 2 , which in this embodiment is essentially cuboid with rounded edges on one side.

The case 2 In this embodiment includes four sockets 3 , which are designed as protective contact sockets.

For easy access to the sockets 3 which are designed as CEE 7/3 sockets are the sockets 3 across, in particular by 45 ° across, to the side wall of the housing 2 aligned.

The case 2 further comprises a frame on the front of the housing 4th which serves as a cover. It's just the surrounding frame 4th but not the top 5 of the housing 2 designed to be removable for the intended use.

The direction of insertion of the sockets 3 is the same, ie plugs can be inserted into all sockets with one insertion direction towards the wall (not shown) 3 be plugged in.

A latch can also be seen 6th , which is on a side wall of the housing 2 is appropriate.

In this illustration is the latch 6th inserted, which has the consequence that the sockets 3 with the plug ( 15th in 3 and 5a) are electrically connected.

It can also be seen that a spacer is located on the underside of the housing 7th protrudes.

2 Figure 4 is a top plan view of the receptacle extension 1 , now the frame 4th , which serves as a cover, is removed.

The case 2 includes the recordings 10 for clipping on the frame. After removing the frame, there are now two screw openings 8th to recognize over which the housing 2 the socket extension 1 can be attached to a wall.

The screw feedthroughs 8th lie on one edge of the case 2 next to the sockets 3 .

A connecting line between the screw feedthroughs 8th runs through the area in which the sockets 3 are arranged. In particular, the imaginary connection runs between the screw bushings 8th essentially in the middle of the area where the sockets 3 are arranged.

This ensures that the lever arm to the fastening point is as small as possible when inserting and removing plugs.

It can also be seen in this embodiment that now the bolt 6th out of the case 2 sticking out the sockets 4th are therefore not electrically connected to the connector.

The latch 6th includes locking hooks 9 over which it is inserted in the housing 2 is locked.

3 shows a top view of the socket extension 1 , where the upper part of the housing ( 5 in 2 ) is hidden.

The latch 6th is designed as a slide and on the one hand includes the arms 11 which form a "U" and which lead to the screw feedthroughs 8th to lead.

The latch, which is designed as a slide, also includes 6th one between the arms 11 lying contact pin carrier 14th at the end of which a contact pin 12 is arranged.

By sliding in the latch 6th becomes the contact pin 12 to contact 13 emotional. The contact 13 is with the plug that can be inserted on the wall 15th connected.

By closing the switch formed in this way, a power supply to the sockets of the socket extension is 1 manufactured.

In the view shown here is the latch 6th , which has the shape of a trident in the plan view, so shown in the disconnected state. The ends of the arms 11 lie in front of the screw feed-throughs.

Only when in the screw feedthroughs 8th Screws are screwed in and thereby the housing 2 is firmly attached to the wall, the latch can 6th be operated.

4th corresponds to the representation according to 3 , with now the latch 6th after mounting the socket extension 1 was actuated. It can now be seen that the contact pin 5 an electrical connection between the conductors 25th and 24 was produced. The sockets can now be used.

It can be seen that the ends of the arms 11 now lie over the screw ducts.

5a Figure 4 is a perspective, partially cut away view of the receptacle extension 1 .

On the one hand, the plug on the wall can be seen 15th .

It can also be seen that at a distance from the wall-side plug 15th the spacer 7th is available.

The spacer 7th bridged in the area of the screw feed-through 8th the distance between the underside of the housing and the wall, which is present due to the housing protruding from the wall of a wall-side flush-mounted socket.

The arm 11 the one with the bolt 6th is connected, has a boom at its end 16 on, which in this embodiment is a step to the arm 11 forms.

The latch 6th is designed as a total slide. A guided tour 17th the housing is on the arm 11 on.

The latch 6th with the arms 11 can only be moved in one direction in the housing.

5b FIG. 3 is a detailed view of area A of FIG 5a which explains how to ensure that the latch 6th Can only be operated when the socket extension 1 is attached to the wall.

It can be seen that in the area of the screw feed-through 8th a blocking organ 18th is available.

In this embodiment, the screw lead-through 8th also through the locking device 18th .

The blocking organ 18th is via locking hook 21st connected to the housing and is in this embodiment via a spring 19th supported.

The socket extension is in the state shown here 1 not mounted on the wall.

A contact surface 22nd of the boom 16 in this state lies on a collar 20th of the blocking organ 18th on. As a result, it is not possible to use the boom 16 in the direction of the screw feed-through 8th to move. The latch 6th is thereby blocked.

A screw (not shown) is inserted through the screw feed-through 8th guided and screwed in on the wall side, the screw head comes to the contact surface 23 of the blocking organ 18th to the system and moves the locking element at the end of the screwing-in process 18th against the spring force of the spring 19th towards the bottom of the case.

The boom 16 is then no longer on the collar 20th of the blocking organ 18th on, so that now the latch 6th together with the poor 11 can be operated.

On the opposite side is the socket extension in the area of the screw feed-through 8th designed accordingly so that the latch 6th can only be operated when the housing is fastened with both screws.

6th Fig. 3 is a side sectional view in the non-actuated state.

Here, too, is easy to see how the arm 11 with the boom 16 on the locking device 18th rests so that the latch 6th can only be actuated when the locking device 18th is pushed down by a screw.

The invention made it possible to achieve an easily mountable socket outlet extension with improved safety.

List of reference symbols

1

Socket extension

2

casing

3

socket

4th

frame

5

Top

6th

bars

7th

Spacers

8th

Screw feedthrough

9

Locking hook (latch)

10

admission

11

poor

12

Contact pin

13

Contact

14th

Contact pin carrier

15th

plug

16

boom

17th

guide

18th

Locking device

19th

feather

20th

collar

21st

Locking hook (locking device)

22nd

Contact surface

23

Contact surface

24

management

25th

management

Claims (13)

Socket extension (1) for a protective contact socket, comprising a housing (2) with a plug (15) and at least a plurality of sockets (3), characterized in that the housing (2) has means for fastening the socket extension to the wall, which as a through hole (8) are designed for a screw, so that the housing (2) can be firmly connected to an on-site wall. Socket extension (1) according to the preceding claim, characterized in that the sockets (3) can be electrically connected to the plug (15) via a bolt (6), wherein the bolt (6) can only be actuated when the socket extension (1) is attached to the wall. Socket extension (1) according to the preceding claim, characterized in that the socket extension (1) comprises at least one locking member (18) which releases the bolt (6) by means of a screw for fastening to the wall. Socket extension (1) according to one of the preceding two claims, characterized in that the bolt (6) has at least two arms (11) is connected, which cooperate with a respective locking member (18). Socket extension (1) according to one of the preceding three claims, characterized in that the bolt (6) latches in an electrically connected state. Socket extension (1) according to one of the preceding four claims, characterized in that the bolt (6) is connected to a contact pin carrier (14) which has a contact pin (12) for closing an electrical contact (13) for connecting the socket (3) with the plugs (15). Socket extension (1) according to one of the preceding five claims, characterized in that the socket extension (1) comprises at least one screw feedthrough (8) for fastening the housing (2) to the wall, the bolt (6) being released when a screw is screwed in. Socket extension (1) Claim 7 , characterized in that the at least one screw feed-through (8) is accessible via a removable cover. Socket extension (1) according to the preceding claim, characterized in that the cover is designed as a frame (4). Socket extension (1) according to one of the preceding claims, characterized in that the housing (2) comprises at least one wall-side spacer (7) spaced from the plug (15). Socket extension according to the preceding claim, characterized in that the spacer (7) comprises the screw feed- through (8). Socket extension according to one of the preceding ten claims, characterized in that the bolt (6) is designed as a slide. Socket extension (1) according to one of the preceding claims, characterized in that the socket extension (1) comprises at least three sockets (3).

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