Power outlet

Abstract

A socket S is presented with a socket base comprising connection means for an outer conductor, a neutral conductor and a protective conductor, which are connected to an outer conductor contact, the neutral conductor contact and the protective conductor contact of the socket S, wherein a support ring and spreading claws of the socket are connected to the protective conductor contact of the socket S via a contact rail K, wherein the socket S has a central plate connected to the socket base by means of a central screw, wherein the central screw engages in a flanged bushing B. What is special about this is that the contact rail K contacts the flare bushing B for earthing the central screw with a contacting agent FL, which is designed as a curved spring tab, so that the self-locking of the central screw is improved.

Description

[0001] The invention relates to a socket with a socket base comprising connection means for an outer conductor, a neutral conductor and a protective conductor, which are connected to an outer conductor contact, the neutral conductor contact and the protective conductor contact of the socket, wherein a support ring and spreading claws of the socket are connected to the protective conductor contact of the socket via a contact rail, wherein the socket has a central plate connected to the socket base by means of a central screw, wherein the central screw engages in a flange bushing.

[0002] Sockets in which the protective conductor contact is designed as a grounding bar and connected to a protective conductor are already known from the prior art. This ensures that the socket is grounded. Such sockets are known, for example, from DE 20 2016 103 797 U1, DE 10 2016 111 959 B3, and DE 10 2009 060 378 B3.

[0003] The problem with such sockets, however, is that the socket has a central plate connected to the socket base by means of a central screw, whereby the central screw is not integrated into the earthing system.

[0004] DE 81 35 904 U1 therefore discloses a two-pole, earthing-contact socket outlet with pin earthing according to British standards, in which a base end piece is connected to a base via a continuous central metal bolt. The metal bolt is designed on the underside of the base as a connection terminal for the earth conductor and is attached to a busbar leading to the earthing socket. The metal bolt is also designed as a hollow rivet body with an internal thread on the cover side for a cover plate fastening screw 38.

[0005] Based on this discussed prior art, the object of the invention is to provide a socket that offers improved safety with regard to the earthing system, while only increasing the manufacturing costs insignificantly.

[0006] This task is solved by a generic socket, in which the contact rail also contacts the flanged socket for grounding the central screw with a contacting agent. This ensures that the central screw is integrated into the grounding system, with the existing contact rail being expanded to include the contacting agent in a cost-effective manner.

[0007] The core idea of ​​the invention is that a minimal extension of the existing contact rail allows contact between the central screw and the earthing system or protective conductor. This represents a particularly cost-effective solution, while assembly is not complicated, as the number of parts remains the same. This cleverly exploits the fact that the existing contact rail is usually extended by less than 1 cm with respect to a contact element that contacts the central screw, since in a generic socket, the central screw and contact rail are usually arranged adjacent to each other.

[0008] According to a particularly preferred embodiment of the invention, the crimping bushing has an angular contour which acts as an anti-twist protection in that the angular contour engages in a complementarily formed recess of the base.

[0009] In the socket according to the invention, the contacting means is designed as a spring tab. The spring tab is curved, improving the self-locking of the central screw. This further contributes to safety with regard to the grounding system.

[0010] The invention is described below with reference to various exemplary embodiments and the accompanying figures. They show: Fig. 1: a schematic representation of a previously known contact rail for a conventional socket, Fig. 2: a schematic representation of a contact rail according to the invention for a socket according to the invention, Fig. 3: a schematic representation of a contact rail according to the invention, the crimping bushing for earthing the central screw (to be inserted into the crimping bushing, not shown here), contacted according to the invention with a contacting means, Fig. 4: a perspective, schematic representation of a socket according to the invention (rear view), and Fig. 5: a perspective, schematic exploded view of a socket according to the invention (rear view),

[0011] In the various figures, identical parts are always provided with the same reference symbols and are therefore usually named or mentioned only once.

[0012] Fig. Figure 1 shows a schematic representation of a previously known contact bar K for a conventional socket S, which serves to connect the protective conductor contact or earthing bar to a protective conductor (which is arranged in a connection means, in particular a plug-in terminal). In this case, a central screw is not integrated into the earthing system.

[0013] In contrast, Fig. 2 a schematic representation of a contact rail K according to the invention for a socket S according to the invention. What is special here is that the contact rail K has a Fig. The flanged bushing B shown in Figure 3 is contacted with a contacting means FL for grounding the central screw. The contacting means FL has a recess into which the flanged bushing B can be received. The contacting means is designed as a spring tab, with the spring tab being curved to improve the self-locking of the central screw.

[0014] In Fig. Figure 4 is a perspective, schematic representation of a socket S according to the invention in a rear view, showing the installation situation. It can be seen that the crimped sleeve B has an angular, in this case square, contour V, which acts as an anti-twist device by engaging the angular contour V in a complementary recess of the socket base. Fig. 5 is the Fig. 4 shown socket in an exploded view.

[0015] The invention is described using exemplary embodiments. Without departing from the scope of the applicable claims, numerous further possibilities for implementing it will become apparent to a person skilled in the art without the need for detailed explanation within the scope of these statements. List of reference symbols B flare bushing FL contact agent K Contact rail S socket V-shaped contour

Claims

[1] Socket (S) with a socket base comprising connection means for an outer conductor, a neutral conductor and a protective conductor, which are connected to an outer conductor contact, the neutral conductor contact and the protective conductor contact of the socket (S), wherein a support ring and expanding claws of the socket are connected to the protective conductor contact of the socket (S) via a contact rail (K), wherein the socket (S) has a central plate connected to the socket base by means of a central screw, wherein the central screw engages in a flanged bushing (B), wherein the contact rail (K) contacts the flanged bushing (B) for earthing the central screw with a contacting means (FL), characterized by that the contacting means (FL) is designed as a curved spring tab, so that the self-locking of the central screw is improved. [2] Socket according to claim 1, characterized bythat the crimped bushing (B) has a square contour (V) which acts as an anti-twist protection in that the square contour (V) engages in a complementary recess in the socket base. [3] Socket according to claim 1 or 2, characterized by that the contacting means (FL) has an opening for receiving the flare bushing (B). [4] Socket according to claim 3, characterized by that the opening contacts the flare bushing (B) all around.

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