SK5962003A3 - Safety element for power sockets - Google Patents

Abstract

Safety element (1) for closing the contact openings on the front part (9) of a power socket. The contact pins of a plug contact the electrical connection lines or contact elements, fixed inside the power socket corresponding thereto, through said contact openings (8). The safety element (1) comprises inclined surfaces (2a, 2b) which have the same spacing relative to each other as the contact openings (8) and which may be brought from a position adjacent to the contact openings (8) into a position at least partially over the contact openings (8). In order to guarantee optimal safety with easy manipulation, the inclined surfaces (2a, 2b) of the safety element (1) terminate in a preferably curved projection (3a, 3b), which extends into the contact opening (8) in that position of the inclined surfaces (2a, 2b) which at least partly covers the contact openings (8).

Description

ELECTRICAL SOCKET SAFETY DEVICE

Technical field

The invention relates to a security element for closing the contact openings of the front part of a mains socket according to the preamble of claim 1.

Such security features are intended to prevent pin-shaped objects from being inserted into the contact opening of the power outlet. Only when the contact pins of the plug (plug) are simultaneously inserted in the contact openings does the safety element release the contact openings.

BACKGROUND OF THE INVENTION

Known security elements of this type are substantially movable transversely to a line joining the contact holes of the power outlet. If the plug with the contact pins is inserted into the contact openings, the security element is pushed out of the openings area due to the inclined surfaces arranged thereon, thereby releasing the contacts of the connection wires inside the mains socket to allow connection of the contacts. If force is applied to only one inclined surface, it will become jammed in the guide of the security element and thus become locked, so that the contacts of the connection cables inside the mains socket do not come loose. Such security elements are known, for example, from EP 539.093 and EP 646.990.

However, they have the disadvantage that the desired jamming when guiding the security element only on a one-sided pin load requires, on the one hand, a very narrow tolerance of the components to be ensured in order to ensure reliable jamming of the security element and provide protection

32123 / T against insertion of an individual pin into one of the two contact holes, and on the other hand, the conventional plug (plug) with both of its contact pins must be inserted very precisely to prevent the safety element from accidentally locking.

Furthermore, security elements are known which are rotatable to release the contact holes. However, this solution also has the disadvantage of greater space requirements inside the power outlet. However, with modern mains sockets with multiple connection options in the supply area, very little space is available inside, which makes this embodiment impossible.

The object of the invention is therefore to avoid these disadvantages and to propose an alternative solution for a security element or a mains socket with a security element of the type mentioned in the introduction, which guarantees a safe opening and closing of the contact openings with easy movement of the security element while reliably preventing the openings of the openings. when inserting an object into only one contact opening.

SUMMARY OF THE INVENTION

According to the invention this is achieved by the features of claim 1.

By means of the proposed measures, it is ensured that when only one pointed object is inserted into one of the contact openings of the mains socket, the other, which protrudes into the inclined surface of the security element, always prevents its displacement.

The feature of claim 2 also provides for an accurate displacement of the security element inwards. In order to move the recesses of the inclined surface of the security element from the contact openings, it is necessary to move the security element not only laterally along the guide groove, but also inwardly (in depth). This releases the recesses from the contact holes and only then allows lateral displacement. The jumper and the collar prevent the insertion of the inside which has lost the lateral guidance.

BRIEF DESCRIPTION OF THE DRAWINGS

Hereinafter, the invention will be described in detail with the aid of examples and figures, in which:

Fig. 1 is an axonometric view of the security element of FIG. 2 is a top view of the security element of FIG. 3 is a bottom view of the security element of FIG. 4 is a side view of the security element of FIG. 5 is a front view of the security element of FIG. 6 shows an external view of the front part of the mains socket; FIG. 7 shows an internal view of the front part of the mains socket without a security element, FIG. 8 shows an internal view of the front part of the mains socket with a security element, FIG. 9 is a detailed view of FIG. 8 fig. 10 is a sectional view along the connecting line of the contact holes with the security element; FIG. 11 is a detailed view of FIG. 10

32123 / T

EXAMPLES

Fig. 1 shows an axonometric view of the security element 7. It has sloping surfaces 2a, 2b which, on the one hand, terminate on the surface of the security element 7 in each case preferably in a curved recess 3a, 3b and on the other hand in a recess 7a or a partial recess 7b. In addition, the security element has a guide groove 5 partially surrounded by the pot 4 as well as guide stops 6 which are located on the surface of the security element 1 opposite the recesses 3a, 3b.

Fig. 2 to 5 show this security element 1 in plan view, elevation and side view. The spring 15 is received in the spring cavity 16 formed from the collar 4 and is supported on the one hand by a bridge 11 (indicated by the dotted lines) projecting through the guide groove 5 of the mains socket and on the other.

In the position shown in Figure 2, the spring 15 is in a biased state. Inserting the plug contact pins into the contact holes of the power outlet would move the entire security element in FIG. 2 to the left, whereby the bridge 11 passes into the spring cavity 16 and the spring 15 is further biased. After the contact pin has been removed from the contact holes, the security element 1 is moved again by the spring pressure 15 on the bridge 11 to the position where it blocks the contact holes (to the right in FIG. 2).

Fig. 6 shows the front part 9 of the mains socket with the outward-facing direction of the contact openings 8. On the two sides of the front part 9 of the mains socket there are stop edges 10 through which the front part 9 is connectable with the mains socket part 12. (see Fig. 10). Through the hinges 11, the cover (not shown) can be pivotably coupled to the front portion 9.

32123 / T

Fig. 7 shows the same front part 9 in an interior view without a security element 1. The contact openings 8 are unprotected. After assembling (assembling) the front part 9 with the housing part 12 of the mains socket and connecting to the mains, a pointed object can be pushed through the contacts 8 from the outside of the mains socket, thus creating a high risk of electric shock.

For this purpose, the security element 1 according to the invention, as shown in FIG. 8 so that the recesses 3a, 3b protrude into the contact openings 8 inside the front part 9 of the mains socket. Therefore, there are inwardly projecting handpieces 10 on the inside of the front part 9, which allow precise positioning of the security element and allow movement only in the direction of the line connecting the contact openings 8 or by a suitable guide stop 6, also only to a slight extent, in order to pull the recesses 3a, 3b out of the contact openings 8.

Fig. 9 shows a detailed view of the security element 1 of FIG. 8. The bridge 11 is guided by the groove 5 and is fixedly connected to the front part 9. The spring 15 is here positioned between the collar 4 and the bridge 11 in a biased position.

Fig. 10 and 11 show a cross-sectional view of the front part 9, the housing receptacle part 12 and the security element 1 along a line joining the two contact openings 8. The two recesses 3a, 3b project inward of the contact openings 8. The guide stops 6 are in the guide elements 13 arranged on the housing part 12 of the mains socket.

If the plug with the contact pins moves in the direction of the arrow 14 of FIG. 10, the plug contact pins first hit the recesses 3a, 3b. At the same time, these are displaced inside the mains socket, whereby the guide stops 6 with their inclined surfaces slide along the guide elements 13 of the mains socket part 12 in the mains socket.

32123 / T Shaped Case. The entire security element 1 is displaced in a direction substantially parallel to the direction of the inclined surfaces of the guide stops 6, thereby releasing the contact openings 8.

The spring which is tensioned between the bridge 11 and the collar 4 is further tensioned by this movement. When the contact pins of the plug are withdrawn from the contact openings 8 again, the spring force is applied, which pushes the safety element 1 back into its locking position.

If it is attempted to insert only one pointed object into the contact apertures, as can happen, for example, in children's games, for example, the recess 3a moves into the wall socket, but the recess 3b, which in this case is still plugged in the other contact aperture it prevents the security element 1 from completely moving, so that the child cannot be electrified.

On the other hand, the improper insertion of the contact pins of the plug does not cause any blocking of the security element, so that even if the contact pins are not perfectly synchronously inserted into the two contact openings 8, the plug is connected to the mains socket.

Also, with the embodiment of the invention, it is not necessary to adhere to extreme tolerances to reach the manufacturing range in order to guarantee the functioning of the security element and to block the contact openings by the recesses of the inclined surfaces of the security element.

Claims (2)

PATENT CLAIMS A security element (1) for closing the contact openings (8) of the front part (9) of the mains socket, through which the contact holes (8) can be used to connect the contact pins of the plug with electrical connection lines or suitable contact elements connected thereto. within the mains socket, the security element (1) having inclined surfaces (2a, 2b) which are spaced apart from each other as the contact openings (8) and which can be brought from a position adjacent to the contact openings (8) to at least partially extending through the contact openings (8) and wherein the security element (1) preferably has a guide groove (5) surrounded by a collar (4) with which the bridge (11) arranged in the mains socket is engageable and in the spring cavity (16) formed from the section a spring (15) is placed on the collar which rests on the bridge (11) and on the collar (4), characterized in that the inclined surfaces (2a, 2b) The support element (1) terminates in its end regions facing the contact openings (8), preferably in each case in an arcuate recess (3a, 3b) which projects into the contact openings (8) in a sloping surface position (2a, 2b), at least partially overlapping the contact holes (8). Security element (1) according to claim 1, characterized in that it has guide stops (6) which can be brought into engagement with respective guide elements (13) in the mains socket, along which the security element slides longitudinally as it slides.