FR2693846A1 - Electric safety plug using magnetic detection - has permanent magnet plate fixed in insulating material with male entry between two pins and Hall effect detector - Google Patents

Abstract

The safety electric plug uses electronic detection of a magnetic field on a magnetic strip that is attached to the plug and enters the socket and is between the two pins. Inside the socket is a magnetic detector which detects the magnetic field using the Hall effect. When the plug is inserted the magnetic field of the small strip magnet (1) activates the magnetic detector (2) on the side of the wall (3). The detector delivers a control impulse to an electrode (4) through an intermediate transistor (5) and the contacts (6) of the socket become active. When the plug is removed the magnetic field is no longer detected. The transistor stops activation and the triac is no longer a conductor. The contacts of the wall plug are now no longer active. USE/ADVANTAGE - Disabling of electrical sockets from any current using plugs with magnetic strip. For use with normal European and American standards, creating sockets that are child-safe.

Description

DESCRIPTIVE MEMORY
The present invention relates to a safety electrical outlet fitted with an electronic device ensuring effective protection against any risk of electric shock to which children are especially exposed.

 The classic electrical outlets allow the connection to the sector of various electrical devices @ household appliances, electronics, lights etc ...). But the drawback is that these sockets are constantly under tension, and that they are generally very close to the ground and therefore within the reach of children. These can easily be electrocuted by inserting a metallic object (hairpin, nail, needle, etc.) into the orifices of the socket. This kind of accident is moreover very frequent in households.

A number of procedures exist to deal with these risks
- Locking socket
- Plug cover etc ...

But in the case of frequent handling, it is not uncommon to omit to lock or replace the socket cover (the latter can simply get lost). The electrical outlet object of this description overcomes these drawbacks. In addition, this safety socket only supplies the mains voltage if, and only if a male plug is inserted into it. Otherwise, the mains voltage is absent; it therefore presents no risk.

The operating principle is as follows: a magnetic bar (permanent magnet) is embedded in the insulation (plastic, bakelite, etc.) of the male plug, between the two pins.

The wall socket, on the other hand, has a magnetic detector (HALL effect detector) inserted between its two studs on its inside. When the plug is inserted, the magnetic field of the small magnet (1) of the plug acts on the magnetic detector (2) through the wall (3). The magnetic detector then delivers a control pulse which triggers the triac (4) via the transistor (5). The studs (6) of the wall outlet are then energized. As soon as the male plug is removed
- The magnetic field no longer acts on the detector (2)
- The transistor (5) blocks.

- The triac (4) is no longer conductive, the mains voltage
then remains absent at the studs (6) of the socket
mural.

In summary, as long as a plug is not inserted, the socket will remain de-energized.

It should be noted that the device: object of this invention is adaptable as well to sockets and plugs to European standards as to those to American (or other) standards.

We have explained further: the top that the permanent magnet is embedded (or molded) in the mass of the insulation of the male plug (A). But to use the already existing files, we offer thrilling solutions which consist
- Is. to use a magnet (small) with
N a self-adhesive side allowing the. fix between
male plug pins (13).

- Either use a small insulating strip (plastic
for example) in which is inlaid, crimped or molded
a magnet. An opening at each end of this bar
will insert it into the pins of the male plug (C).

The advantages of this new device are as follows:
- Avoids the risk of electric shock, especially in children.

 - Splashing water will be harmless.

- Prevents bricolage by electrical wires
naked.

- By using the removable magnet solution, the device
constitutes an excellent locking system in this sense
that, by removing only the magnetic strip, this
prohibits the use of certain household appliances
dangerous for children (iron for example).

The attached drawings illustrate the invention.

Figure i @ represents the basic diagrams of the electronic part (given for information). As can be seen, the reduced number of components makes it possible to obtain a small printed circuit; the socket, object of the present invention, will therefore remain within the limits of the dimensions and dimensions of conventional sockets
The power supply to the electronic circuit is taken from the mains (taking care of the phase and neutral orientation bucket)
- The condenser (7) of 1 microfarad, 250 V lowers the
voltage by capacitance effect (Considering the consumption
reduced in size, this solution was preferred
when using a heavy and bulky transformer).

 - The diodes (8,9) ensure the rectification.

 - The 12 V ZONER diode (10) stabilizes the voltage at 12 V.

- The capacitor (11) 1000 microfarads, 25 V ensures the
filtering.

 - The transistor (5 is a PNP (BC 177 for example).

 - The resistance (12) = 220 ohms.

 - The triac (4) switches the mains voltage.

- - The magnetic detector 'HALL effect detector) (2) =
integrated circuit SAS 250 or other.

Figure II shows as an indication the different possible versions of the male plug with its small permanent magnet.

It goes without saying that the device (socket and plugs) described can undergo various modifications without departing from the scope of the invention.

Claims (4)

 - R E V E N D I C A T I O N S  power supply of any electrical or electronic device.  is supplied by a small permanent magnet (1) secured to the male plug of the cor-  this socket only if there is a magnetic field.  stick with an electromechanical magnetic detection device which puts under  1 - Electrical connection device characterized in that it comprises an electrical outlet 2 - Electrical connection device according to claim X characterized in that  the main component of the electronic device incorporated into the electrical outlet  is a magnetic field sensor (or detector) (2>. This component, of size  reduced, is fixed on the internal face, between the studs, of the electrical outlet @ de  so that, without being visible from the outside, this sensor is sensitive to  magnetic field of the permanent magnet (1) (of the male plug) through the wall  of the socket (3).  embedded in the mass of the insulation of A. Fig. 11).  with a small permanent magnet located between the pins. This magnet is molded or  teeth characterized in that the male plug of the electrical supply cord is 3 1 Electrical connection device, according to any one of the preceding returns 4 - electrical connection device according to any one of claims 1 and  2 characterized in that the permanent magnet of the plug. Male is molded or inlaid  tee -in the mass of an Insulating bar. This bar fitted with a  magnet can be installed on the male plug and this thanks to the two orifices of which  is fitted with the bar at each of its extremities. Ports serving past  two pins of the male plug and hold the strip (C, Fig II 5 - Electrical connection device according to any one of claims 1 and  2 characterized in that the small permanent magnet has an adhesive face  = allowing it to be fixed between the pins of the male plug (B, Fig II).