SK278181B6 - Electric socket with improved disconnection characteristics - Google Patents

Abstract

Electric socket contains the receiving part (12) with hollow (23) for gripping of plug, body (3) for supporting of receiving part (12), where in receiving part (12) and in body (3) are arranged the openings (5), which have contacts (15) for securing of current path between electrical network and pins of plug inserted into hollow (23), hollow and receiving part (12) are assignemented aids for alleviating of taking out of socket from received part. Alleviating aids include the pressing bar (1) supported and leaded in receiving part (12) or in body (3) connected with pushing plate (2) in form of double-arm lever with external and internal end (16,19) where the pushing plate (2) is supported by pressing bar (1) in one direction the inner end (19) of pushing plate (2) moves in opposite direction and parallel with origin direction, at which the external end (16) is in working connection with pressing bar (1) and the inner end (19) is located in middle part of depression (23).

Description

Technical field

The invention relates to an electrical outlet for realizing the electrical connection of the appliance to the electrical network by means of a plug, the electrical outlet comprising means for facilitating the pulling out of the plug, i.e. to disconnect the plug and the plug. The proposed drawer shows improved performance when the plug is to be removed.

BACKGROUND OF THE INVENTION

Electrical sockets of known types include connecting side panels which are pushed onto the plug pins inserted into a recess in the socket. The pressure exerted by the sidewalls ensures that the plug can be removed from the electrical outlet by applying force from the range between the minimum and maximum rating. This value is increased by friction between the plug and the wall of the socket recess, which is difficult to determine. Most designs have the disadvantage that the force exerted by one hand of the user may not be sufficient to overcome the resistance of the plug, since the other hand should hold the drawer in position. Thus, the socket is subjected to high pulling force, and this can be compensated by means of spacers for fixing the electrical socket to a box built into the wall. Despite the use of various means to secure the socket in its position during removal of the plug, it sometimes happens that the socket is pulled out of the wall, with or without the box, disconnecting from the wires that come loose, which can be dangerous to human life. It is also dangerous if the plug is pulled by the cord, as high pulling force can break the cord at the point where it plugs into the plug. A further disadvantage may be when the drawer is pulled out of the box in the wall with great force, whereby the ends of the usually solid conductors get out and the drawer can only be returned with difficulty for the part of the wires to be released. Sometimes the conductors may touch each other in such cases and in such a situation a fire may break out. Shortened wires can cause many practical problems during installation work.

These drawbacks are extremely dangerous if the plug is installed in a location that is difficult to access and the plug, although it is relatively easy to plug in, i.e. plug in, is difficult to remove because the plug is virtually impossible to hold by hand while removing the plug .

Various means for removing the plug from the socket are known.

U.S. Pat. No. 4,114,969 discloses a drawer comprising a spring, the insertion of the plug compresses the spring and the resilient force released during removal facilitates this step. A similar construction is described in EP-PS no. 0 203 808. This solution provides a relatively low elastic force which may be sufficient for the American type of sockets and plugs, but is often inadequate when using European types, especially when the socket is designed for grounded installations.

US-PS 4,042,292 discloses another proposal to facilitate the removal of plugs of small and medium-sized household appliances from electrical outlets. The socket according to this patent is completed with a tilting plate in the form of a broken lever on which the inserted plug rests. The problem is that the tilting plate is a little thick. The thicker the tilting plate, the easier it is to pull out the plug, but the shorter the effective length of the plug pins.

Of course, the lever thickness can be reduced by using high strength materials, which are usually expensive plastics, composites or metals. The first option is unacceptable for cost, the other for safety.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION The object of the present invention is to provide an electrical outlet which overcomes the above disadvantages and thus offers the possibility of easily pulling out the plug with one hand without the risk of pulling the plug out of the box.

The invention makes use of the fact that, in order to facilitate removal of the plug from the electrical socket, it is appropriate to use a force which acts in the opposite direction to the direction of movement of the plug when it is withdrawn. That is, the invention contemplates that the plug should be removed by applying a compressive force instead of a pulling force. Therefore, according to this knowledge, it is appropriate if the plug is subjected to a compressive force initially in the socket. Thus, it is practically impossible to pull the plug out of the wall, more precisely from the box delimiting the inside of the plug, when the plug is pulled out, by applying a compressive force to the plug, thereby eliminating the risk of pulling the wires out of the plug. Thus, it is an object of the invention to facilitate the pulling out of the plug by providing a structure that reverses the direction of force application and that the structure is to be part of the socket.

The object is solved by an electrical socket having improved disconnection characteristics according to the invention, which comprises a receiving part with a recess for receiving the plug, a body for supporting the receiving part, wherein openings are arranged in the receiving part and in the body. the plugs inserted into the recess and the receiving portion are associated with means to facilitate removal of the plug from the receiving portion. It is an object of the invention that the means for facilitating comprises a push rod supported and guided in a receiving portion or body connected to a push plate in the form of a two-arm lever with an outer and inner end, wherein the push plate is supported such that the end of the printing plate moves in the opposite direction and parallel to the original direction, and this preferably constitutes a rocking lever supported between the recess and the body, the outer end in operative engagement with the printing rod and the inner end substantially positioned in or below the central region of the recess.

According to a first preferred embodiment of the electrical socket according to the invention, the push rod is supported and guided in the receiving part, the push plate lies in a recess and its inner end has an involute-shaped push surface.

According to a second preferred embodiment of the electrical socket according to the invention, the push rod is supported on the body and guided in the receiving part, the inner end of the push plate being operatively connected to the push element, wherein the push element is arranged in the central part of the recess.

According to a third preferred embodiment of the electrical socket according to the invention, the receiving portion or a portion thereof forms a nest arranged between the guide elements, wherein the push rod rests on the body and is connected to a push plate disposed beneath the receiving portion. If the nest is formed as a portion of the receiving portion, the push rod is supported on either the receiving portion or the body and is connected to the printing plate independently of the nest, while the printing plate is arranged below the nest.

Preferably, the electrical receptacle comprises a push rod and a press plate made of suitable high strength plastics.

The life of the electrical socket according to the invention can be increased if there is a forked connection between the push bar and the push plate, the outer end of the push plate being preferably made with two outer portions of varying thickness at the tapered portion of the push rod.

In order to ensure good power transmission conditions, it is advantageous if the pressure plate and the pressure bar clamp at right angles. In this case it is also advantageous if the outer end section of the printing plate connected to the printing rod has a minimum thickness at the connection point with the printing rod.

The electrical outlet of the invention can be used in households and generally in all cases where the outlet is installed in a hard-to-reach location.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be described in more detail by way of example embodiments shown in the figures, wherein FIG. 1 is a cross-sectional view of the first embodiment of the electrical socket of the invention in the broken plane 1-1 shown in FIG. 2, FIG. 2 shows a plan view of an embodiment of an electrical outlet, the cross-section of which is shown in FIG. 1, FIG. 3 is a cross-sectional view of the second embodiment of the electrical outlet of the invention in the broken plane Π-ΙΙ shown in FIG. 4, FIG. 4 shows a plan view of an embodiment of the electrical outlet, the cross-section of which is shown in FIG. 3, FIG. 5 is a cross-sectional view of a third embodiment of the electrical socket of the invention in the HIHI broken plane shown in FIG. 6, FIG. 6 is a plan view of an embodiment of the electrical outlet, the cross-section of which is shown in FIG. 5th

DETAILED DESCRIPTION OF THE INVENTION

The electrical outlet will be described below with respect to electrical outlets of a similar type to those commonly used in Europe and many other parts of the world (Figs. 2, 4, 6). In these types, the electrical socket is divided into a receiving portion 12 defining a recess 23 for a plug (not shown) and a body 3 in which the apertures 5 are arranged, with a circular cross-section corresponding to the plug pin. The body 3 and the receiving part 12 are connected to each other by at least one clamping plate arranged in the body and fastened in the receiving part 12 by respective screws. In the body 3 in the openings 5 are arranged contacts 15 of resilient material that press with a predetermined force on the plug pins inserted into the socket . In the recess 23, side contacts 22 are secured to its side walls to provide a third current path required in grounded electrical devices, the side contacts being electrically connected to a plate 4 secured by a screw or other known means in the body 3. Of course, the general principles of the invention in other types of drawers, without departing from the spirit of the invention as expressed in the appended claims.

As shown in FIG. 1,3,5 The design of the proposed electrical outlet is similar to the electrical outlet typically used in Europe in households to connect low or medium power appliances to the mains. As mentioned above, this drawer comprises a receiving portion 12 and a body 3, where the apertures 5 with the contacts 15 are arranged. The receiving portion 12 and the drawer body 3 are complemented by well known fasteners, namely a tab 7 which is pushed by screw 6 on a box (not shown) built into the building wall and a bent plate supporting the element 8 is connected to a base frame member 9 holding the top of the drawer, the top of which is a cover plate 10 defining a recess 23 for receiving a plug (not shown). This arrangement is common to all embodiments of the electrical socket of the invention and is not new.

The novelty of the electrical socket according to the present invention resides in the use of a push rod 1, which is inserted into the receiving part 12 at a suitable place in the cover plate 10 and is supported and guided by the receiving part 12, cf. Fig. 1, 3, 5, or body 3. The push bar 1 is connected to the outer end 16 of the pressure plate 2 supported by the body 3 or the receiving member 18 of the receiving part 12. The pressure plate 2 forms a two-arm lever, i.e. an element which can be rotated on the support a surface 14 about a suitable axis of rotation. Preferably, the pressure plate 2 forms a pivot arm supported in the receiving portion 12 or on the body 3 and connected at right angles to the pressure bar 1. Of course, the pressure plate 2 can also be supported independently of either the body 3 or the receiving portion 12. The press plate 2, as mentioned, is connected at its outer end 16 to the push rod 1 and its second, inner end 19 lies in or near the central region of the depression 23 where it comes into direct or indirect contact with center area of the plug. The push rod 1 has an extension 24 with or without an inner bore, which is limited at the bottom by a pin 17, or with two outer depressions defining also a narrower axial region (not shown). In the first case, the outer end 16 of the printing plate 2 is inserted into the inner hole of the printing rod 1, in the second case the outer end 16 of the printing plate 2 embraces a fork as a fork narrower axial region of the printing rod 2. the thickness is such that the minimum value is in the area where the platen 2 is connected to the platen 1. This change results from the conditions of force transfer between the platen 2 and the platen 1. The platen 2 corresponds in shape to the receiving member 18 defining the surface a receiving portion 12 touching the printing plate 2.

The pressure rod 1 and the pressure plate 2 are preferably made of high-strength plastics, since this can avoid safety problems.

The electrical socket according to the invention can be manufactured in several simple basic embodiments.

The first of these is shown in detail in FIG. 1. Here, it can be seen that the push rod 1 lies in an inner bore arranged in the outer end 16 of the press plate 2, thus forming a forked connection and the press plate 2 forms a rocking lever. The platen 2 is arranged in a diagonal direction at the bottom of the recess 23, the width of which is chosen so that it does not overlap the opening 5. Obviously, it can be made with a larger width, but in this case a hole should be made into the platen 2. so that the opening 5 remains accessible to the plug pin. In this construction, by applying a compressive force to the outer end 16 of the platen 2 by means of the push rod 1, the inner end 19 of the involute-shaped rocking lever 13 is lifted and moves in the opposite direction with respect to the direction of the compressive force. In this embodiment, the rocker lever lies on a support surface 14 arranged in the receiving member 18.

A cross-sectional view of another preferred embodiment of the electrical socket of the invention is shown in Figure 3, where the plate 4 is not necessary, since an electrical socket of this type must not be connected to a grounded power line conductor. For this reason, the side contacts 22 are not in the recess 23. The difference between this solution and the solution shown in FIG. 1, the pressure plate 2 is supported on a support surface 14 arranged in the upper part of the body 3 and its inner end 19 contacts the pressure element 11. A storage space 21 is left between the receiving member 18 and the body 3 where the pressure When the push rod 1 is pushed downwards, the inner end 19 of the push plate 2 moves the push member 11 upwards, which facilitates the removal of the plug from the holes S and the recess 23.

In another preferred embodiment of the electrical socket of the invention shown in FIG. 5, the part or section of the receiving portion 12 forms a nest which is arranged between the guide members 20. The nest as a whole can be displaced by the action of the printing plate 2. In this case, the printing plate 2 also covers, similar to the solution of FIG. 3, the upper surface of the body 3 as well as the support surface 14 forms a rocker lever. When the push rod 1 is pushed downwards, this movement is transmitted to the receiving part 12, which together with the plug is thus removed from the body 3. Thus, the plug can be easily removed.

In the electrical socket according to the invention, the push rod 1 and the push plate 2 are to provide a plug withdrawal sufficient to remove the plug from the locations between the contacts 15 in the apertures 5.

Industrial usability

The electrical socket according to the invention can be used in all devices which serve to make electrical connections by means of plugs, not only in households, but also in industry and services. By facilitating the withdrawal of the plug, the socket according to the invention will increase the safety of the electrical networks used in connection with various appliances.

Claims (10)

An electrical outlet having improved disconnection characteristics comprising a receiving portion with a recess for receiving a plug, a body for supporting the receiving portion, wherein openings are provided in the receiving portion and in the body having contacts to provide a current path between the electrical network and plug pins inserted into the plug; depressions, the receiving portion being associated with means for facilitating removal of the plug from the receiving portion, characterized in that the means for facilitating removal of the plug comprise a push rod (1) which is arranged slidably and is operatively connected to a push plate (2) comprising an outer end (16) for operably engaging the push bar (1) and an inner end (19) to facilitate removal of the plug by pressing, the inner end (19) being arranged in or below the central region of the depression (23) while the pressure plate ( 2) forms a two-arm lever, and rotates its point ania is disposed between the outer end (16) and the inner end (19) and leaning against the supporting surface (14) below the pressure plate (2). Electrical socket according to claim 1, characterized in that the push rod (1) is supported and guided in the receiving part (12), while the push plate (2) lies in the recess (23), its inner end (19) it has an involute-shaped push surface (13). Electrical socket according to claim 1, characterized in that the push rod (1) is supported on the body (3) and is guided through the receiving part (12), the inner end (19) of the push plate (2) being in operative connection. with a thrust member (11), wherein the thrust member (11) is arranged in the central portion of the depression (23). Electrical socket according to claim 1, characterized in that the receiving part (12) forms a nest arranged between the guide elements (20), wherein the push rod (1) rests on the body (3) and is connected to the push rod. a plate (2) located below the receiving portion (12). An electrical outlet as claimed in claim 1, characterized in that a receptacle for receiving a plug is provided in the receiving part (12), which is arranged between the guide elements, the push rod (1) being supported on either the receiving part (12) or o the body (3) and is connected to the pressure plate (2) independently of the nest, while the pressure plate (2) is arranged below the nest. Electrical socket according to one of claims 1 to 6 5, characterized in that the pressure plate (2) is arranged between the body (3) and the recess (23), forming a rocker lever. Electrical socket according to one of Claims 1 to 7 6, characterized in that the pressure rod (1) and the pressure plate (2) are made of plastics. Electrical socket according to one of claims 1 to 8 7, characterized in that a fork joint is provided between the push bar (1) and the push plate (2). Electrical socket according to claim 8, characterized in that in the fork connection the outer end (16) of the printing plate (2) is formed with two outer parts of varying thickness, which is arranged next to the narrower part of the push rod (1). Electrical socket according to one of Claims 1 to 9, characterized in that the pressure bar (1) and the pressure plate (2) form a right angle.