ES2213736T3 - POWER BASE WITH ALVEOL SHUTTER AND RANGE THAT INCLUDES A BASE OF THIS CLASS. - Google Patents

Abstract

Power outlet base (100) comprising a trim (110), provided with a front wall (112) having two holes (113A, 113B) intended to receive two contact pins of a plug, a body placed in the part rear of the trim, comprising an insulating box that houses female-type electrical contact elements, located in front of two holes of said front wall, and a plug (130), positioned above said contact elements and movable between different positions, said shutter (130) comprising, on one side (130A), inclined surfaces (131B, 132B) capable of being positioned in front of said holes (113A, 113B) in a second shutter position (130), as well as means (134, 134A ) for cooperation, capable of cooperating with a drive pin (117) inserted in said insulating box, in order to pass said plug (130) from a first position to its second position, characterized in that said pin a (117), it forms a monobloc with the trim (110), and protrudes from the rear face (116) of said front wall (112) of the trim (110).

Description

Power socket with shutter alveoli and range comprising a base of this class.

The present invention relates, in a manner general, to the power outlet bases and, among them, to the electrical outlet bases provided with contact shutters female.

The invention relates in particular to a power outlet base comprising a trim equipped with a front wall that has two holes intended to receive two contact pins of a plug, a body placed in the rear part of the trim, comprising an insulating box that houses the female-type electrical contact elements located facing the two holes of said front wall, and a shutter, positioned above said contact elements and movable between different positions, said said shutter, on one side, inclined surfaces susceptible to positioned in front of said holes, in a second position of the shutter, as well as means of cooperation, likely to cooperate with a drive pin inserted in said insulating box to pass said shutter from a first position to its second position.

Through documents GB 2 068 651, ES 1 046 309 and GB 2 260 863 a power outlet base of the type above.

According to documents GB 2 068 651 and ES 1 046 309, the shutter can move between its positions first and second by the action of a spike of earth or a positioning drive pin inserted in the box insulator housing the shutter and passing through a hole supplementary provided on the front wall of the bezel.

According to GB 2 068 651, this is the ground pin provided in the plug inserted in the socket of current and, according to document ES 1 046 309, it is a solidarity drive pin of an adapter positioning arranged in the plug before insertion into the power socket considered.

According to GB 2 260 863, which is considered As the closest state of the art, the shutter can move to rotation between their first and second positions by the action of an earth pin inserted in the insulating box that houses the shutter and passes through an additional hole provided on the front wall of the bezel.

Also in this case, this spike of earth is provided in the plug to be inserted in the socket outlet in question.

However, the three power outlet bases These are called positioning bases, in which, in a first time, it is necessary to act on the shutter to wear your functional earrings in front of the holes in the wall front of the bezel and allow, in a second time, the insertion of the active pins of the plug inside the electrical contact elements of female type, passing through holes provided in the front wall of the bezel.

With respect to the prior art, The present invention proposes a power outlet base, without positioner, arranged so that the body located in the part Rear bezel of this base can be used advantageously, without modification, to obtain a base of current with positioner.

More specifically, the invention proposes a basis outlet as defined in the introduction, characterized in that said drive pin forms with the bezel a monobloc piece and protrudes from the rear face of said front wall of the bezel.

Through the term "monoblock" above It should be understood that the drive pin is in solidarity with the bezel before mounting it on the base body of outlet.

To this end, said drive pin can be formed integrally with the trim or be arranged in the rear face of this thanks to appropriate mounting means.

Other non-limiting and advantageous features of the outlet base according to the invention, are the following:

- the shutter comprises, on said face, flat surfaces that can be positioned in front of them trim holes in said first position of the shutter;

- the shutter can move to rotation;

- the shutter can move according to a combined movement translation / rotation;

- the shutter comprises, in its central part, a support element applied with a support shaft of a support piece fixed, in order to be shifted to rotation;

- the shutter can move to translation;

- the shutter comprises two locking arms, extending one in the extension of another, on both sides of a central part, each locking arm comprising one of said inclined surfaces;

- said inclined surfaces provided in said locking arms are oriented in reverse directions;

- said inclined surfaces provided in said locking arms are oriented in the same direction;

- each shutter lock arm comprises a flat surface adjacent to the inclined surface corresponding cited and capable of positioning itself in front of one of said trim holes in the first position of said shutter;

- said means of cooperation of the shutter they comprise an actuating arm that extends, according to a radial direction, from a central part of the shutter;

- said drive arm comprises means pivot, to be able to swing by the action of said pin operating between two positions, namely a position of interlocking, in which said actuator arm is fully supported against an edge of a fixed support piece interposed between the front wall of the bezel and said shutter, and a position of unlocking, in which said drive arm is disengaged from said edge of said fixed support piece.

- said pivoting means comprise a articulation zone that joins said drive arm with said central part of the shutter;

- said articulation zone is a union flexible formed integrally with the shutter;

- said pivoting means comprise a pivot located on one face of said drive arm oriented to the side opposite the bezel;

- said drive arm has, on one side oriented towards the bezel, a susceptible cam surface cooperating with said drive pin;

- said drive arm has, on one side oriented towards the bezel, an inclined part susceptible to cooperate with said drive pin;

- said drive pin has, in its free end, a ramp that cooperates with said arm of shutter drive, to bring the shutter to its second position from a third position in which it is positioned away from said holes of the bezel;

- the shutter is a monobloc part;

- the shutter is made of two pieces, which fit with each other, having a first piece flat surfaces liable to position themselves in front of said wall holes front of the trim in the first position of the shutter, and having a second piece said inclined surfaces which, in said first shutter position, are masked by said first piece, said first piece being able to move between said first position and said second shutter position, for de-apply said inclined surfaces of the shutter so that be positioned in front of said holes of the bezel; Y

- an elastic means is provided to return the shutter to its first or second position.

The invention also relates to a range of electrical outlet bases comprising a first base, such as has been defined in the foregoing, and a second base, which includes a body identical to that of first base, as well as a bezel, provided with a central wall that has two holes intended to receive two contact pins from a plug and a hole supplementary, for the introduction inside said box insulator of a drive pin of an adapter arranged in a plug to be inserted in said second base, placing said cooperation means of said shutter in front of said hole supplementary to cooperate with said drive pin introduced inside the insulating box, in order to make pass said shutter from its first position to its second position.

The description that follows, along with the drawings attachments, provided by way of non-limiting examples, will it is well understood what the invention is and how it can be done

In the attached drawings:

- Figure 1 is a partial schematic view of Exploded view, in perspective, of a socket outlet according to the invention;

- Figure 2 is a front view of the base of power outlet of figure 1, mounted;

- Figure 3 is a view, from behind, of the power outlet base of figure 1, mounted;

- Figures 4 to 6 represent, seen from back, the plug of the power outlet base of figure 1, positioned in its support piece according to its three positions different;

- Figure 7 is a partial schematic view of exploded, in perspective, of another outlet base that It is part of the range of electrical outlet bases according to the invention;

- Figure 8 is a schematic view, in perspective, of a plug intended to be inserted into the base of power socket of figure 7;

- Figure 9 is a front view of the base of power socket of figure 7;

- Figure 10 is a front view of the power socket of Figure 7, into which the adapter provided in the plug shown in figure 8, Y

- Figure 11 is a view, from behind, of the power socket of figure 7, mounted, with adapter inserted inside the base.

By way of introduction, it is noted that identical or similar elements of the different bases of making current represented in the different figures will be assigned, as far as possible, the same references, and will not be described on each occasion.

In Figures 1 to 3, it has been represented, of partially, a preferred embodiment of a base 100 of outlet comprising a trim 110 provided, in the front face, of a cavity 111 receiving a plug male.

The bottom of the cavity constitutes the wall front 112 of the bezel 110.

This front wall 112 has two holes 113A, 113B intended to receive the two contact pins of the plug (not shown) inserted in base 100.

This front wall 112 also includes another hole or female contact 114 through which a pin of ground connection not shown.

The cavity 111 of the bezel 110 has a cylindrical shape of revolution and, to that end, is delimited by a cylindrical wall 115.

Classically, the base 100 of current comprises a body, not shown, placed in the part rear of the trim 110, and comprising an insulating box, not represented, which houses electrical contact elements of type female, also not shown, located in front of the two holes 113A, 113B of said front wall 112.

In addition, as shown in Figures 1 to 3, the base Outlet 100 comprises a shutter 130 housed in the insulated box, not shown, which is positioned above the electric contact elements of female type. This shutter 130 can move between different positions (see figures 4 to 6).

According to the preferred embodiment, shown in figures 1 to 3, the shutter 130 is mounted to rotation in one piece 120 fixed support which is located next to the rear face 116 of the front wall 112 of the bezel 110.

For this, the shutter 130 comprises, in a central part, a support element 133 applied with an axis 125 provided in the central part of the support piece 120.

This support piece 120 is shaped so that a cylindrical housing of revolution is defined around the axis 125 receiving the shutter 130.

The bottom 120A of the support piece 120 which is applied against the rear face 116 of the front wall 112 of the trim 110 comprises, on either side of axis 125, two openings 121, 122, which are positioned so that they coincide with the holes 113A, 113B of said front wall 112.

In addition, the bottom 120A of the support piece 120 it comprises a circular opening 123, which is positioned so that coincides with the hole 114 of said front wall 112, in order to that is pierced by the ground contact pin, not represented, from the base 100 of the power outlet.

The support piece 120 closes on the side opposite to the bezel 110 by means of a plate 150, thereby that the shutter 130 is sandwiched between the bottom 120A of the piece 120 support and platelet 150.

This plate 150 has the shape of a disk of diameter equal to the inner diameter of the support piece 120 and it comprises, in its central part, an opening 153 crossed by the axis 125 of said support piece 120.

Plate 150 comprises, on both sides of the central opening 153, two other openings 151, 152, which are placed so that they coincide with openings 121, 122 of the piece 120 support and holes 113A, 113B of the front wall 112 of the bezel 110.

In addition, the platelet 150 comprises, at its edge peripheral, two notches 154, 155, positioned so diametrically opposite. Notch 155 is positioned so that it matches with the circular opening 123 of the support piece 120 and the hole 114 of the front wall 112 of the bezel 110, to allow passage of the ground pin of said base 100.

The contact pins, not shown, of a plug inserted in the cavity 111 for receiving the bezel 110 of base 100, access the electrical contact elements female type through openings 121, 122 of part 120 support and openings 151, 152 of platelet 150.

The thickness of the support piece 120 that receives the shutter 130 is slightly larger than its thickness, so that there is a small play between the bottom 120A and the shutter 130, on the one hand, and the platelet 150 and the shutter 130, on the other. From that way, shutter 130 can rotate around the axis 125 remaining in its plane of rotation, that is, without oscillation in a perpendicular plane.

The shutter 130 comprises, in this case, two locking arms 131, 132, extending one in the extension of another, on either side of the central part that comprises the support element 133.

Each locking arm comprises, on the side of the face 130A of the shutter 130 oriented towards the bezel 110, an inclined surface 131B, 132B and, adjacently, a flat surface 131A, 132A.

The flat surfaces 131A, 132A of the shutter 130 are likely to be positioned in front of the openings 121, 122 of the support piece 120 and therefore to the holes 113A, 113B of the bezel 110, in a first shutter position 130, which is represented, more particularly, in Figure 4.

In addition, the inclined surfaces 131B, 132B of the shutter 130 are likely to be positioned opposite the openings 121, 122 of the support piece 120 and, therefore, to the holes 113A, 113B of the bezel 110, in a second position of shutter 130, represented more particularly in the Figures 2 and 5.

In its first position, represented in the figure 4, the flat surfaces 131A, 132A of the shutter 130 form stop surfaces for the contact pins of a plug inserted in the receiving cavity 111 of the bezel 110 and, by  in this way, the shutter 130 prevents said contact pins from access to the female electrical contact elements of the 100 base outlet.

In the second position, represented in the Figures 2 and 5, the shutter 130 is in the waiting position of the contact pins of a plug to be inserted into the socket 100 of current. The support of the contact pins of a plug in the inclined surfaces 131B, 132B of the shutter 130 causes the rotation of this clockwise, indicated by the arrow F, so that it is placed away from said holes 113A, 113B of the bezel (see Figure 6). I know thus allows the insertion of said contact pins in the body of the 100 outlet base and its contact with electrical contact elements of the female type of said base 100

To move the shutter 130 from its first to its second position, said shutter comprises means of cooperation liable to cooperate with a drive pin 117, made of non-conductive material, inserted in the insulating box, not depicted, of the body of the outlet base 100.

In this case, these means of cooperation of the shutter 130 comprise a drive arm 134, which is positioned between its two locking arms 131, 132 and that extends from the central part of the shutter 130 according to a radial direction

This drive arm 134 has, on its face oriented towards the bezel 110, a cam surface 134A liable to cooperate with the drive pin 117, in order of generating a rotation movement of the shutter 130 between its first position and its second position, represented in the figures 4 and 5.

According to one characteristic particularly advantageous of the outlet base 100 represented in the Figures 1 to 3, the drive pin 117 forms with the bezel 110 a monobloc piece, and protrudes from the face rear 116 of said front wall 112 of the bezel 110.

In this case, the drive pin 117 is formed of a piece with the bezel 110, but as a variant I could expect it to be arranged on the back side of the trim, with appropriate mounting means.

Thus, once assembled, the base 100 takes of current, represented in Figures 1 to 3, comprises a shutter 130 of female contacts and constitutes a socket for current without positioner, in which a plug can be inserted without positioner

In fact, in its first position the shutter 130 is located in the housing defined by piece 120 support and closed by platelet 150. The set of the three elements above is mounted on the insulating box, not represented, which houses the electrical contact elements of female type of base 100. The support piece 120 comprises, with this end, ratchet pins 127 protruding from a track 126. The insulating box supporting said support piece 120 forms a block or body independent of base 100, ready to receive a bezel and, in particular, the bezel 110.

During the installation of the bezel 110 on the body of the base 100, the drive pin 117 provided in she cooperates with cam surface 134A of arm 134 of shutter drive 130, in order to make it pass from its first position to its second position, represented in the figures 2 and 5. In this second position, inclined surfaces 131B, 132B provided in locking arms 131, 132 of shutter 130 are positioned in front of openings 121, 122 of part 120 bracket and holes 113A, 113B of the front wall 112 of the trim 110.

When, subsequently, a plug is inserted into the power outlet base 100, the contact pins of the plug rest on said inclined surfaces 131B, 132B of the shutter 130, in order to make it pass from its second position towards its third position, represented in figure 6, and accessing to the female-type electrical contact elements housed in the insulating box of the base 100, below said shutter 130.

Advantageously, the contours 121A, 122A of the openings 121, 122 provided in bottom 120A of part 120 stand, marry the contours 131C, 132C of the arms 131, 132 shutter lock 130.

In this way, when the shutter 130 is located in its second position, ready to be operated in rotation by said contact pins of a plug, and a user try to access the electrical contact elements of type female of said base 100, located under shutter 130, by means of any instrument, such as a screwdriver, which rest on one of the shutter lock arms 131, 132 130 to swing, the other arm 131, 132 blocking the shutter 130 is applied with the corresponding opening 121, 122 of piece 120 support and locks against the area of this opening.

The cooperation of one of the arms 131, 132 of shutter lock 130 with the area of one of the openings 121, 122 of the support piece 120 prevents any rotation of the shutter, and therefore prevents access to the elements of electrical contact of female type of base 100, which responds to regulatory requirements

In fact, to be able to move to rotation, the shutter 130 must remain in its seating position, in which locking arms 131, 132 extend to the same level.

As figures 1 and more concretely show 3, the support piece 120 comprises, at one edge, a notch 124, a through which the end of the actuating arm 134 of the shutter 130, so that it is accessible to the pin of drive 117. A notch 154 of the plate 150 is placed in so that it matches notch 124 of support piece 120.

In addition, shutter 130 is returned from its third position, represented in figure 6, to its second position, in which the openings 121, 122 of the part 120 are sealed bracket and holes 113A, 113B of the front wall 112 of the trim 110, thanks to an elastic recovery means, constituted, in this case, by a recovery spring 140, wound around shutter support element 133 and which It rests on plate 150.

Advantageously, the base 100, described in what above with reference to figures 1 to 6, is part of a range of power outlets comprising a second base 100 ' represented, more particularly, in figures 7 and 9 to 11. This second base 100 'comprises a body identical to that of the first  base 100, as well as a trim 110 ', provided with a wall 112 'front with two holes 113'A, 113'B intended for receive two contact pins 201, 202 from a plug 200, a 114 'hole for the passage of the ground pin, not shown, and a supplementary hole 114 '', for the introduction inside of said insulating box, not shown, of a pin 164 of actuation of an adapter 160 provided in the plug 200 a insert into second base 100 '.

Indeed, the range of bases for making current comprises a first base 100, without positioner, and a second base 100 ', with positioner, comprising bases 100, 100 'first and second identical bodies containing a shutter 130 identical, placing the essential difference at the level of trim, because, in the case of first base 100, the trim 110 carries on its rear face 116 the pin 117 of shutter drive 130, while in the case of second base 100 ', the bezel 110' is classic, without protrusion in the rear face of the front wall 112 ', forming the spike Drive 164 of an adapter 160 disposed in the plug 200 inserted in the second base 100 '.

In the second base 100 'outlet, the means of cooperation of shutter 130, constituted in this case by the drive arm 134 which has the cam surface 134A, are placed in front of the supplementary hole 114 '' provided in the front wall 112 'of the bezel 110', so that they cooperate with the drive pin 164 inserted in said base 100 ', in order to pass said shutter 130 from its first position, as shown in figures 4 and 9, to their second position, as depicted in figures 5, 10 and 11.

Classically, adapter 160 is constituted by a platelet that is crossed by three holes, that is, two holes 161, 162 in which the pins are applied 201, 202 of contact of the plug 200 when the plate is arranged on the outer face of this plug 200, and a third hole 163, which is placed so that it matches the hole provided in the plug, for the insertion of the ground pin, no represented.

As Figure 8 best shows, when adapter 160 is positioned in plug 200, it it comprises three pins, two contact pins 201, 202 and the drive pin 164, of non-conductive material, which allows the shutter drive 130 in a classical manner.

The bases 100, 100 'first and second can easily performed, since the body of these bases is identical and Only the bezel is different.

That way, at the end of the assembly line, it is possible to choose a trim 110 with a spigot drive 117, or a trim 110 without spigot drive, to obtain, from the same body, a base Without positioner or with it.

In addition, an installer or user can configure the power outlet base, at the desired time. They can also easily modify the chosen configuration.

The present invention is not limited, in mode some, to the embodiment described and represented, but the skilled in the art will be able to provide any variant of according to your spirit

In particular, it could be expected that the shutter of the outlet base according to the invention can move on translation, or according to a combined translation / rotation movement, inside the base body.

In the case where the shutter of the socket is taken of current according to the invention can move in translation, said inclined surfaces provided in said locking arms of the shutter are oriented in the same direction.

In addition, the shutter drive arm it can comprise pivoting means to be able to swing, by the action of said drive arm, between two positions, to know, an interlocking position, in which said arm of drive butt against one edge of the fixed support part interposed between the front wall of the bezel and said shutter, and an unlocking position, in which said actuation arm is disengaged from the edge of said part support.

These pivoting means may comprise an articulation zone that joins the drive pin with the central part of the shutter, which can be a flexible joint formed integrally with it, or which may comprise a pivot located on one side of the drive arm facing side opposite of the bezel.

But, according to this embodiment, nothing prevents that the drive arm has, on the face oriented to the trim, a cam surface that cooperates with the spike of drive inserted into the body of the intake base stream.

According to another variant, not represented, one could provide that the shutter drive arm has, on its face oriented towards the bezel, an inclined surface liable to cooperate with said drive pin, instead of the cam surface.

When the shutter shows a movement combined translation / rotation, it can also be expected that drive pin present, at its free end, a ramp cooperating with the shutter drive arm, in order to bring the shutter to its second position from its third position, in which it is positioned away from said holes of the beautifying

Finally, according to another variant not shown, you could plan to make the shutter with two different pieces that they fit into each other, presenting, in a central part, a common support element for shutter cooperation with the rotational drive shaft thereof, having one of the two pieces, namely the first, said susceptible flat surfaces if positioned in front of said front wall holes of the trim, in the first position of the shutter, and having the other piece, the second, said inclined surfaces, which, in said first shutter position, are masked by said first piece due to the fit of the first and second pieces, said first piece being able to move between the first position and the second shutter position to de-apply said inclined shutter surfaces, so that they are positioned in front of said embellishment holes.

Claims (22)

1. Power outlet base (100) comprising a trim (110), provided with a front wall (112) having two holes (113A, 113B) intended to receive two contact pins of a plug, a body placed in the rear part of the bezel, comprising an insulating box that houses female electrical contact elements, located in front of two holes of said front wall, and a plug (130), positioned above said contact elements and movable between different positions, said shutter (130) comprising, on one side (130A), inclined surfaces (131B, 132B) capable of being positioned in front of said holes (113A, 113B) in a second shutter position (130), as well as means (134 , 134A) of cooperation, capable of cooperating with a driving pin (117) inserted in said insulating box, in order to pass said shutter (130) from a first position to its second position, characterized in that said drive beam (117) forms, with the bezel (110), a monobloc part, and protrudes from the rear face (116) of said front wall (112) of the bezel (110). 2. Base (100) according to claim 1, characterized in that the shutter (130) comprises, on said face (130A), flat surfaces (131A, 132A) capable of being positioned in front of said holes (113A, 113B) of the trim (110 ) in said first shutter position (130). 3. Base (100) according to one of claims 1 or 2, characterized in that the shutter (130) can be rotated. 4. Base according to one of claims 1 or 2, characterized in that the shutter (130) can be displaced according to a combined translation / rotation movement. 5. Base (100) according to one of claims 3 or 4, characterized in that the shutter (130) comprises, in its central part, a support element (133) applied with a shaft (125) integral with a support piece (120) ) fixed, in order to be shifted to rotation. 6. Base (100) according to one of claims 1 or 2, characterized in that the shutter can be translated. 7. Base (100) according to one of claims 1 to 6, characterized in that the shutter (130) comprises two locking arms (131, 132), extending one in the extension of one another, on either side of a part central, each locking arm (131, 132) comprising one of said inclined surfaces (131B, 132B). 8. Base (100) according to claim 7, characterized in that said inclined surfaces (131B, 132B) provided in said locking arms (131, 132) are oriented in opposite directions. 9. Base (100) according to claim 7, characterized in that said inclined surfaces provided in said locking arms are oriented in the same direction. 10. Base (100) according to one of claims 7 to 9, characterized in that each shutter lock arm (131, 132) comprises a flat surface (131A, 132A) adjacent to said inclined surface (131B, 132B) corresponding and capable of being positioned in front of one of said holes of the bezel (110) in the first position of said shutter (130). 11. Base (100) according to one of the preceding claims, characterized in that said means of cooperation of the plug (130) comprise a driving arm (134) which extends, according to a radial direction, from a central part of the plug ( 130). 12. Base (100) according to claim 11, characterized in that said actuating arm comprises pivoting means for tilting, by the action of said actuating pin, between two positions, namely an interlocking position, in which said actuator arm abuts against an edge of a fixed support piece interposed between the front wall of the bezel and said shutter, and an unlocking position, in which said actuator arm is disengaged from said edge of the fixed support piece. 13. Base according to claim 12, characterized in that said pivoting means comprise an articulation zone that joins said actuating arm with said central part of the shutter. 14. Base according to claim 13, characterized in that said articulation zone is a flexible joint formed integrally with the shutter. 15. Base according to claim 12, characterized in that said pivoting means comprise a pivot located on a face of said actuating arm facing the side opposite the bezel. 16. Base (100) according to one of claims 11 to 15, characterized in that said actuating arm (134) has, on a face facing the bezel (110), a cam surface (134A) capable of cooperating with said pin (117) drive. 17. Base (100) according to one of claims 11 to 15, characterized in that said drive arm (134) has, on a face facing the bezel, an inclined part capable of cooperating with said drive pin. 18. Base (100) according to one of claims 11 to 15, characterized in that said drive pin has, at its free end, a ramp that cooperates with said shutter drive arm, in order to bring the shutter to its second position , from a third position in which it is located away from said holes of the bezel. 19. Base (100) according to any one of the preceding claims, characterized in that the plug (130) is a monobloc part. 20. Base according to one of claims 1 to 18, characterized in that the shutter is made of two pieces that fit into each other, with a first piece having flat surfaces capable of being positioned in front of said holes in the front wall of the bezel in the first position of the shutter, and having a second piece said inclined surfaces which, in said first position of the shutter, are masked by said first piece, said first piece being able to move between said first position and said second position of the shutter, to de-apply said inclined surfaces of the shutter so that they are positioned in front of said holes of the bezel. 21. Base (100) according to any one of the preceding claims, characterized in that an elastic means is provided for returning the shutter to its first or second position. 22. Range of electrical outlet bases, which they comprise a first base according to one of claims 1 to 21, and a second base, comprising a body identical to that of the first base, as well as a trim provided with a wall front that has two holes intended to receive two pins of contact of a plug, and a supplementary hole, for the introduction, inside said insulating box, of a pin for actuating an adapter arranged in a plug to be inserted on said second base, said means of being placed cooperation of said shutter against said hole supplementary, to cooperate with said drive pin introduced inside the insulating box, in order to make pass said shutter from its first position to its second position.