MX2008006660A - Touch-safe socket - Google Patents

Abstract

A touch-safe socket (1) for electrical articles, such as bulbs (19) having threads, is provided with a movable carriage (6) carrying poles (4, 5), which are connected to an electrical supply via a wire (3). The movable carriage (6) has threads (9) which cooperate with threads (20) on the electrical article, and when the electrical article is screwed into the movable carriage, the movement will cause the poles (4, 5) to make contact with poles (12, 13) which are secured to a stationary plate. Further, a movable bridge (14) having poles (17, 18) is arranged inside the socket, which, when the electrical article is screwed in, will be moved into the socket and also make contact with the poles (12, 13) on the stationary plate. The invention provides a touch-safe socket, where it is impossible with the fingers to get an electric shock, since at least a movement of the carriage (6) and of the bridge (14) is necessary for electrical connection to the socket to be established.

Description

SAFE TOUCH SOCKET FIELD OF THE INVENTION The invention relates to a safe touch socket for electrical articles, such as light bulbs, which have poles where at least two poles connected to an electrical supply are mounted within the socket and where the socket is provided with means Movable to protect against the touch of the poles of the socket, said movable means being affected during the insertion of the electrical article in the socket and wherein the movable means are formed by a movable carriage that carries the poles and where the movement is provided by inserting the bulb into the socket so that the poles make contact with the two poles that are secured to the stationary plate, whose poles extend through the stationary plate.

BACKGROUND OF THE INVENTION U.S. Patent No. 6,491,534 discloses a secure touch socket, wherein a bulb is screwed into the socket, a spring inclined disc, having electrical terminals can move the disc terminals downwardly against of the poles that carry the current in the bottom of the socket and therefore provide voltage to the bulb.

In another embodiment according to the U.S. Patent, the movable parts are formed by inclined spring pressure buttons configured as switches that are placed on the threads of the socket, so that the switches, when the bulb is screwed on the threads will press the housing the push buttons and therefore will provide electrical voltage to the bulb.

A modality that includes both security systems is also described.

In the known structure, it will be relatively easy for a person to press the disc and / or the pressure buttons with the fingers and therefore connect the voltage to the fingers causing an electric shock.

In addition, DE Offenlegungsschrift No. 1 539 415 discloses a safe touch socket of the type defined in the introductory portion of claim 1. A disadvantage of this known socket is that electrical contact to the socket poles can be done by a pull of the socket threads.

SUMMARY OF THE INVENTION Accordingly, an object of the invention is to provide a safe touch socket for electrical articles, such as light bulbs, wherein it is practically impossible to suffer an electrical shock if a person's fingers move inside the socket.

The object of the invention is achieved by a secure touch socket of the type defined in the introductory portion of claim 1, characterized in that, when it is being inserted into the socket, the poles of the electrical article touch the poles that are placed on a movable bridge, said poles extend across the bridge so that when it is moving, the poles of the bridge contact the poles on the stationary plate.

By this means, a pull of the socket threads can not result in electrical contact with the free poles of the socket, it being required that also the movable bridge be pressed into the socket before electrical contact can be made.

For the control of the safety of the movable bridge it is advantageous if, as set forth in claim 2, the movable bridge is spring inclined.

It is a further feature of the invention, as set forth in claim 3, that when it is moving in the socket, the electrical article first moves the moveable bridge in the socket, where the poles of the movable bridge contact the poles in the stationary plate, following that the movable carriage moves in a direction away from the socket until the movable carriage makes contact with the poles in the stationary plate.

For the control of the safety of the movable carriage it is advantageous if, as set forth in claim 4, the movable carriage is provided with threads cooperating with the threads in the electrical article and as set forth in claim 5, the stationary plate is provides within a ramp in which the movable carriage and movable bridge are incorporated.

For further stabilization of the mechanical moving parts in the secure touch socket, it is advantageous if, as set forth in claim 6, the stationary plate is provided with continuous perforations through which the legs in the movable carriage and the movable bridge they can move.

To indicate that an electrical connection is established to the electrical article, it is an advantage if, as set forth in claim 7, a clicking sound is generated or light is produced in a light emitting diode when mounted externally in the housing, at the moment when an electrical connection is established between the poles of the movable carriage and the poles of the electrical article.

This is particularly advantageous if a defective electrical item, such as a bulb, is inserted into the safe touch socket, as it can then be quickly removed if the bulb is blown.

BRIEF DESCRIPTION OF THE FIGURES The invention will now be explained more fully with reference to the accompanying figures in which: Figures 1-1 C show the safe touch socket according to the invention in several stages, from when an electrical article is inserted into the socket and until the electrical article is connected to the parts that carry power from the socket.

DETAILED DESCRIPTION OF THE INVENTION In the Figures, numeral 1 generally designates a safe touch socket in accordance with the invention. It consists of a housing 2 in which, in the lower part thereof, a wire 3 is inserted having two insulated conductors 4 which are connected to the poles 5 in a movable carriage 6. As will be seen, the poles 5 protrude upwards to through a part of the plate in the car 6.

The carriage 6 has a plurality of legs 8, two of which are shown (there are preferably four of which are placed equidistantly in a circle), which extend through a stationary plate 11 secured in the housing 2. In its free upper end the movable carriage has threads 9.

In addition, the housing 2 also accommodates a movable bridge 14 having legs 15, 16, which extend through the stationary plate 6. The movable plate 14 is provided with poles 17, 18 that extend through a plate part. top of the bridge 14.

An annular, movable contact spring 10 is positioned along the edge of the plate part and moves relative to the threads 9, but so that there is constant contact between the threads 9 and the contact spring 10.

The legs 17, 18 are further inclined by two springs 7, which are placed around the legs 15, 16 between the lower side of the upper plate on the movable bridge 14 and the upper side of the parking plate 6.

Finally, the figures show a bulb 19 which can be an ordinary incandescent bulb or an energy-saving bulb having, for example, the thread sizes E14, E27, E40.

The threads 20 of the bulb, which also serves as a pole, have another pole that is designated 21.

Subsequently, it will be explained how the safe touch socket according to the invention operates.

With reference to Figure 1, the safe touch socket is shown before a light bulb 19 is inserted.

Figure 1 A shows a bulb just before inserting it into the socket.

In Figure 1 B, the threads 20 of the bulb have moved within the threads 9 in the movable carriage 11, but have not moved so far.

On the other hand, the movable bridge 14 has moved, which as will be seen, has been pressed down in the direction of the arrow 23 so that the springs 7 are compressed, thereby making electrical contact between the pole 17 in the Movable bridge 14 and pole 21 in the bulb.

When the bulb 19 is screwed in additionally, the movable carriage 6 will pull up in the direction of the arrow 22, so that the movable bridge can not be further pressed into the secure touch socket, which causes the threads 9 in Moveable car 6 pull out.

When the bulb has been screwed sufficiently far into the safe touch socket 1, an electrical connection will be established between the poles 12, 13 on the stationary plate 1 1 and the poles 5 on the carriage 6, after which the bulb receives the current and emit light.

Optionally, a mechanical part is placed in the safe touch socket, which will emit a clicking sound when the bulb is connected.

Alternatively, a light emitting diode, which emits light when the current is applied, can also be placed somehow on the outside of the housing 2.

In addition, it should be noted that the safe touch socket also provides some protection if the movable bridge is replaced by a fixed bridge that is located as shown in Figure 1B.

Claims (7)

1 A safe touch socket for electrical items, such as bulbs that have poles where at least two poles connected to an electrical supply are mounted within the socket, and where the socket is provided with movable means to protect against the touch of the poles of the socket, said movable means being affected during the insertion of the electrical article in the socket and wherein the movable means are formed by a movable carriage, which carries the poles and where the movement is provided by inserting the bulb into the socket so that the poles make contact with two poles, which are secured to a stationary plate, whose poles extend through the stationary plate, characterized in that, when they are being inserted into the socket, the poles of the electrical article make contact with the poles that are placed on a movable bridge, said poles extending across the bridge so that when it is moving, the s poles of the bridge make contact with the poles on the stationary plate

2 A safe touch socket according to claim 1, characterized in that the movable bridge is inclined with spring

3 A safe touch socket according to claims 1-2, characterized in that, when moving in the socket, the electrical article first moves the movable bridge in the socket, where the poles of the movable bridge make contact with the poles on the stationary plate, after which the movable bridge moves in a direction away from the socket until the movable carriage makes contact with the poles on the stationary plate

4 A safe touch socket according to claims 1-3, characterized in that the movable carriage is provided with threads cooperating with the threads in the electrical article

5. A secure touch socket according to claims 1-4, characterized in that the stationary plate is provided within a housing, in which the movable carriage and movable bridge are incorporated.

6. A secure touch socket according to claims 1-5, characterized in that the stationary plate is provided with continuous perforations through which the legs on the movable carriage and movable bridge can move.

7. A secure touch socket according to claims 1-6, characterized in that at the moment when an electrical connection is established between the poles of the movable carriage and the poles of the electrical article, a clicking sound is generated or light is produced in a light emitting diode that is mounted externally in the housing.