MX2007008761A - Power socket with safety shutter. - Google Patents

Abstract

The present invention refers to a power socket useful in domestic and the like type electric installations at a low voltage, which includes a safety shutter device designed in such a manner that only the inner area of the socket may be accessed, said area including contacts in which the prongs of plugs are fitted when the same are suitably and simultaneously introduced therein.

Description

DESCRIPTIVE MEMORY The present utility model refers to a plug-in base, applicable to electrical installations, preferably of domestic type and the like, at low voltage, provided with a safety shutter device, designed so that only the interior area can be accessed where they remain located the contacts where the pegs of the pegs will fit, when they are introduced in their entirety the two ears in unison. The characteristics of this plug base are described in the following memory.

The possibility of accidental access to the interior of the body of a socket outlet, with a metal object, such as a punch, a fork or any similar object within the reach of children, is a risk factor for the concrete fact that there is a regrettable and serious domestic accident due to electric shock.

That is why, taking into account the basic standards in terms of safety in low voltage electrical installations, it is necessary that the aforementioned sockets are provided with a safety device that prevents access to the aforementioned elements and can be introduced unconsciously towards the inside of the base; In this way it prevents them from touching the internal contacts, avoiding the possible accident.

This safety device, however, will be designed to allow correct and without difficulty access of the pins of the plug that must be placed on the plug base, in order to carry out the subsequent connection.

The plug base object of the present utility model, covers the requirements of security and suitable connection, offering the installer an element of total guarantee in its operation, to be placed in the installations, low voltage, domestic and similar, such as previously it has been indicated.

This obturator device is designed to be installed inside the base, below its upper plate, which plate will be provided with the appropriate openings for use in the connection of standardized pins, known as the "bipolar" or "American" type. ", which have cylindrical or flat pins, indistinctly, the openings are two rectangular openings, arranged parallel to the axis of central symmetry and tangent to them, circular openings located on the outer edge of the rectangular openings and tangent to them.

In this basic model for pegs known as "bipolar" or "American" type, the sealing device protects the incorrect or accidental access to the interior by the openings intended for the introduction of the corresponding pins of the plug intended to establish electrical contact.

In the base embodiment variant provided with a third opening, intended for the passage of the pin that corresponds to the grounding of the device, the shutter mechanism will not regulate access by said third opening since the ground contact located inside The plug base is not connected to any electrical conductor, thus there is no risk.

It is thus essential feature of the plug base object of the present utility model, the fact that the plug, which can be displaced only when the two pins for electrical connection are introduced in unison, is designed in such a way that it can be displaced by the pins whether they are cylindrical or flat, depending on the type of plug that is plugged in, according to the functionality of the bipolar base.

In order to describe in detail the of the socket provided with safety shutter, object of the present invention, some drawings are attached in which, by way of non-limiting example, a practical embodiment of said base has been represented.

In said drawings, Figure 1 is a perspective view of the base, in its bipolar embodiment without grounding, and of narrow module, showing the totality of its components located as an explosion, and the location of each of them with respect to the rest; Figure Ibis is a perspective view of the obturator, larger in size, showing its characteristic elements; Figure 2 is a perspective view of the base, in an embodiment identical to that of the previous figure, but with a cover plate for wide module. In this figure the position of the plane AA, of section for the views of figures 12 to 13bis, is indicated; Figure 3 is also a perspective view of the base, identical to that of figure 1, but provided with grounding; Figure 4 is a perspective view, like the previous ones, of the base identical to that of figure 2, but provided with grounding, the plane AA 'also being indicated; Figure 5 is a perspective view, and also with the exploded elements, of the two components that make up the security shutter device, but viewed below, that is, by its lower face, corresponding to the base of plug of figure 1, narrow module; Figure 5bis is a perspective view, and below, of the cover plate, corresponding to the plug base of Figure 2, of wide module; Figure 6 is a sectional view of the base, according to the embodiment of Figure 2, showing the manner of fastening the lid plate on the base body; Figure 6bis is a sectional view of the same base, but sectioned according to a plane perpendicular to the plane of the section of the previous figure; Figure 7 is a view of the base, according to the embodiment of Figure 1, showing the manner of fastening the lid plate on the base body; Figure 7bis is a sectional view of the same base, but sectioned according to a plane perpendicular to the plane of the section of the previous figure; Figure 8 is a view of the assembly, sectioned according to an imaginary vertical plane, perpendicular to the axis of symmetry of the set, and located in the middle area of the obturator. In this figure a strange element is represented, similar to a peg of pin, located to the outside and initiating its entrance by an opening of the base; Figure 9 is a section of the set, identical to the one in the previous figure, showing the sequence of the introduction of the foreign element through the opening of the base and coming to touch the obturator; Figure 9bis is a detail, larger, of the area of the entrance opening, opposite the opening where, accidentally, an attempt is made to introduce a foreign element, according to Figure 8; Figure 10 is a section of the same assembly, same as that of figures 8 and 9, but showing the foreign element that has been introduced through the opening of the base resting on the obturator and moving it in the swinging direction, without having access to the interior; Figure 10bis is a detail, larger in size, of the area of the opening opposite the opening through which an element is accidentally introduced, according to Figure 10, showing the safety interlock of the shutter against the cover plate; Figure 11 is a view similar to that of the sectioned assembly, of figures 8, 9 and 10, but with the element introduced through the other opening of the base; The Figure Ubis is a detail, larger, of the area of the opening opposite the opening where, accidentally, an element has been introduced that has displaced the shutter, according to the previous figure, showing the safety interlock of this end of the shutter against the cover plate; Figure 12 is a view of the assembly, sectioned by the plane AA1 indicated in Figures 2 and 4, showing a foreign element inserted inside and touching on the shutter; Figure 12bis is a detail, larger, of the area of the cover plate through which the foreign element has been introduced, showing the interlocking of the lower edge of the obturator; Figure 13 is a view of the assembly, also sectioned by the plane AA ', showing the two pins introduced and touching on the plug; Figure 13bis is a detail, larger in size, of the area through which one of the pegs has been introduced and the unlocking of the lower edge of the obturator; Figure 14 is a sectional view of the assembly, according to Figure 8, in which the principle of the sequence, up to Figure 17, of the correct introduction of the base of the two pins of a pin is represented. In this figure, both spikes, in the embodiment of cylindrical spikes, have not yet been introduced into the base; Figure 15 is a view identical to that of the previous figure, of the sectioned assembly, but with the pins beginning to enter their corresponding openings, and said pins touching the upper face of the shutter; Figure 16 shows the continuation of the sequence, according to figures 14 and 15, at the moment when the spikes, acting in unison on the obturator, have displaced it laterally and begin to be introduced towards the interior of the base body; Figure 17 is a view identical to the previous figures 14 to 16, and in which the pins, having displaced the obturator, have been fitted in the contacts of the interior of the base body; Figure 18 is a sectional view of the assembly, identical to that of figure 14 and following, but showing the beginning of the sequence of the correct introduction in the base of the two flat pins of a plug according to this embodiment, being positioned said pins above the assembly, without having begun to enter the base; Figure 19 draws, according to the previous figure, the flat pins establishing contact in the shutter; Figure 20 shows, always according to the previous figures 18 and 19, the lateral displacement of the obturator, provoking by the unison action of the two flat spikes that are being introduced; Figure 21 is the end of the sequence, showing the flat pins located perfectly in the corresponding area of the contacts, inside the base body of the device; Finally, Figures 22 and 22bis are two details of the action of one of the flat pegs in the corresponding place of action on the obturator. In Figure 22, it still does not touch the shutter, and in Figure 22bis it is striking on it.

According to all these drawings, sufficiently detailed, the plug base with safety shutter object of the present utility model, is characterized by presenting the following practical embodiments, which will be described below: a) Plug-in base of narrow module, with its rectangular contour, without grounding, according to the representation of figure 1; b) Wide module plug socket, with square contour, without ground connection, according to the representation of figure 2; c) Plug-in base of narrow module and grounding, according to the representation of figure 3; Y d) Plug socket of wide module and grounding, according to the representation of figure 4; In these four practical embodiments, the components indicated below are represented differently, while the remaining components are the same or, in the case of the grounding embodiments, they have other additional components.

The plug base object of the present utility model is characterized by being constituted by the base body (1) on which it will be placed, fixing itself in the appropriate way, the cover plate (2), both being perfectly held by the pins of closure (3) of the lid (2) that are snapped into corresponding holes (4) that the base body (1) has on its upper edge, while on the opposite side the lid plate (2) is retained by its projections as teeth (5) fitted, under the corresponding projections (6) of the upper edge of the base body (1).

This base body (1), according to the representation of figure 1, known as a narrow module with a rectangular contour and without an earthing connection, has a series of small enclosures in its interior, of which the reference ones (7) constitute the spaces where the connection contacts (8) will be located and correctly positioned, whose base block (9) is located inside each projection (10) that the base body (1) has on its underside.

Under the lower face of the cover plate (2) is located the obturator (11) displaceable in the longitudinal direction, provided with the cylindrical spring (12) which, by its pushing action, will keep the shutter (11) in the closed position , preventing access to the interior of the base body (1) through the openings (13) located on the upper face of the cover plate (2).

The obturator (11) is kept in its place of location thanks to the tabiquillos (14) that the cover plate (2) has on its inside face, while on its lower part, it rests on the upper edges of the tabarillos ( 7) of the interior of the base body (1), so that it can move longitudinally, sliding on the edges of the mentioned tabiquillos (7), guided between the tabiquillos (14) of the back of the cover plate (2).

A safety locking flange (7b) is located in an end area of the upper edge of a small partition (7).

The openings (13), located on the upper face of the cover plate (2), both in its rectangular contour (2) and in the square contour (2a) embodiment are mixed, having a circular hole together with a rectangular opening (13a), tangent to the interior, which thus constitutes the plug base suitable for the connection, indistinctly, of bipolar pins of cylindrical pins or of bipolar pins of rectangular or flat pins, known as the "American" type.

In the rest of the description, these openings will be cited with reference (13) / (13a).

In the variant embodiment of the wide module base, without grounding as described above, and according to what figure 2 illustrates, the base is composed of the cover plate (2a), with a square contour, different from that of the previous embodiment, and of the base body (la), likewise of square contour, coincident and identical to that of the cover plate (2a).

When varying the dimensions, both the base bodies (1) and (la), as well as the cover plates (2) and (2a), are differentiated by the arrangement of the tabiquillos located inside.

The obturator (11), with its cylindrical spring (12) and the contacts (8) for connection, are identical in both embodiments.

In the embodiments with grounding, the base object of the present utility model is composed of the base body (Ib), on which is placed, suitably holding, the cover plate (2b), both of narrow module and rectangular outline, according to figure 3.

This base body (Ib) has in its interior, in addition to the tabiquillos (7) for placement of the connection contacts (8), the tabiquillos (7a) where the ground contact (15) will be positioned, along with its block-base (16).

Also, and always within the same embodiment of narrow module with grounding, on the upper face of the cover plate (2b) is located a third opening (17) for the passage of the grounding pin, opening quadrangular shape with the semicircular interior side.

The base embodiment for wide module and grounding, according to figure 4, presents the base body (le) which also it has inside the tabiquillos (7a) for the positioning of the grounding contact (15), although the dimensions are different, being square instead of rectangular, dimensions equal to those of the cover plate (2c).

In this embodiment, the cover plate (2c) has the two openings (1 3) / (13a) and the opening (17), all of which are in the position required by the standard dimensioning of the pins with flat or cylindrical pins and with the third pin for grounding.

The connection contacts (8) are of the type of elastic double clamp, located adjacent, with the central area (8a) of both the place of connection of the cylindrical pins (18) and the internal clamp (8b) for connection, of the flat tang (19), as shown in figures 17 and 21 respectively. On the base block (9) of each contact (8), the clamping screws (9a) are fixed as well as on the grounding contact (15).

This grounding contact (15) is of the type of elastic clip with an upward opening, thus arranged to allow a correct locking of the grounding pin, not shown in the drawings.

The obturator (11) is the characteristic element of the plug base that is described, object of the present utility model, in the four variants of embodiment that have been detailed in the previous paragraphs.

Its practical application allows to guarantee access to the interior of the base body of the device, preventing accidental contact with any of the two connection contacts (8) as no object can be introduced through the openings (13) / (13a) of the plate. top.

As regards the grounding embodiments, according to figures 3 and 4, taking into account that the contact (15) intended for this function is not connected to any electrical current, does not require the protection described above, so that the shutter (11) only prevents access through the two openings (13) / (13a) corresponding to the passage of the pins for the electrical connections poor the corresponding contacts (8).

This obturator (11) consists of a block of substantially prismatic shape, which has on its upper face and at one of its ends, a wide area in descending ramp towards the end edge (20), with a vertical breakwater (20 a) in one of its extreme angles.

It also has the obturator (11), at its opposite end, a ramp inclined towards the inside (2 1), flanked on both sides by vertical walls (22), with sloping upper edges, slightly upward from its end to the central part thereof, and inclined with the same inclination as the ramp (2 1). These side walls (22) impinge on the ramp (2 1) with rounded chamfered edge.

At one of the lower edges of the obturator (11) and under one of the side walls (22) an elongated socket (22a) is located, which is substantially rectangular. This fitting (22a) will allow the sliding of the obturator (11) when it moves laterally, saving the locking flange (7b) located on the upper edge of the small part (7) of the base body (1).

The bottom (lia) of the shutter (11), between the ramps (20) and (21) is open, to allow the passage of the pin that will rest against the ramp (21) when moving the shutter (11).

Finally, on one of its sides, the obturator (11) has a projection (23) in the form of a horizontal "L", open towards the end where the ramp (21) is, which projection will constitute the housing where the spring will be placed cylindrical (12) of the obturator, retained at its end by the projections (23a) that has the projection (23) inside.

These details of the characteristic form of the obturator (11) are sufficiently represented in figures 1 and 2, where it has been drawn in reverse positions, seen from one side and the other, as well as in the larger Ibis figure.

The placement of the cylindrical spring (12) in the interior of the horizontal "L" -shaped projection (23), will cause, thanks to the action of said expanding spring (12), the shutter (11) will be located with its zones (20) and (21) under the two openings (13) / (13a) of the cover plate (2), (in all its variants of embodiment (2a), (2b), and (2c)), preventing access to the interior of the base body (1) (also in its different variants of embodiment (the), (Ib) and (le)) , and eliminating the danger of accidentally reaching the electrical connection contacts (8), since no objects can be inserted.

This cylindrical spring (12) is located, at its opposite end, in the rear vertical wall (24), located on the back of the cover plate (2), as well as in the various variants thereof. In this way, said spring (12) is correctly positioned and supported to allow it to carry out its expansive action under pressure, when the shutter is in the position in which it closes the access through the openings (1 3) / (13a) ).

The spring (12) is also kept correctly positioned when fully compressed, when the plug (11) has been displaced by the joint action of the two pins, cylindrical (18) or flat (19), of the plug to be connected in the socket In this fully compressed position, said cylindrical spring (12) is held laterally, without having the possibility of accidentally leaving its position, by the walls of the "U" projection (23) of the shutter (11) itself and of the vertical wall (24) on the back of the cover plate (2).

When it is intended to introduce a foreign element (25) through one of the openings (13) / (13a) of the cover plate (2), in any of its variants, this element, as shown in FIG. draws in sequence in figures 8 to lObis, acts by pressing on one side of the obturator (11), causing the elevation, by balancing, the opposite end thereof, so that it is fitted under the opening (13) / (13a) by the trailing edge (21a) of the inclined ramp (21) that engages against the rim (21b) that has the lid plate (2). In this way the obturator (11) does not move at all in the longitudinal direction and therefore the aforementioned openings (13 / 13a) remain closed.

If you try to introduce the foreign element (25) through the other opening (13) / (13a) according to figures 11 to 12bis, the shutter (11) also moves in the direction of rocking, the breakwater (20a) being the ramp (20) which engages behind the projection (20b) that the cover plate (2) has on its lower face, next to the opening (13 / 13a), and at the same time the lower rear part of the shutter ( 11) engages against the locking flange (7b), preventing the shutter (11) from moving longitudinally.

In the correct case of the base object of the present utility model, the unison positioning of the two cylindrical pins (18) of the pin (26) through the openings (13) / (13a), causes the longitudinal displacement of the obturator ( 11), due to the pressure exerted by both pins (18) on the ramps (20) and (21), displacement that is carried out by overcoming the action of the cylindrical spring (12), all as shown in sequence figures 14 a 17 The displacement of the shutter (11) leaves the passage open below the openings (13) / (13a), so that the pins (18) can interlock in the established area (8a) of the connection contacts (8).

In the event that it is desired to plug a pin (27) of flat pins (19), the action unison of these on the ramp areas (20) and (21) of the plug (11) is similar, being represented in the sequence of figures 18 to 21, being represented in figures 22 and 22bis, the way in which the lower end of the flat tang (19) rests on the ramp (21), not on its bottom but on the edge of its edges. side walls (22), since being this type of pin (27) of flat pins (19), of smaller distance between pins than that of the pin (26), of cylindrical pins (18), it will be able in this way, press on the obturator (11), which will be identical for both types of plugs, and therefore, of indistinct use.

These flat pins (19) will interlock in the internal clip (8b) of the connection contacts (8), suitably located inside the base body (1).

Having sufficiently described the plug base with safety shutter object of this utility model, it should be noted that any variation in the dimensions, shapes, appearance and exterior finish of the different components of the device, as well as the type of materials used, will not alter the essentiality thereof, being summarized in the claims that follow.

Claims (1)

1. CLAIMS Ia. - Plug socket with safety shutter, formed by a base body (1) and a cover plate (2), provided on this cover plate (2) with the appropriate openings for the plugging of standard pins of the so-called "bipolar" type. , as well as those of the so-called "American" type, provided with the first of two cylindrical pins (18) and the second ones with flat pins (19), and optionally with a third grounding pin, arranging the two openings on the cover plate (2). mixed (13) / (13a), circular hole the first (13) and rectangular hole the second (13a) tangent to the previous one, characterized by having a sealing device that prevents accidental access of any object through any of the openings ( 13) / (13a) of the cover plate (2), for passage of the circular (18) or rectangular (1 9) electrical connection pins, device that is located under the cover plate (2) positioned and guided by the tabiquillos (14) of its back and leaning on the tabiq uillos (7) that has the base body (1) inside it, so that the shutter (11) itself can be moved, as required, to allow access to the interior of the base body (1), or to prevent, by sealing, said access, leaving the whole device, obturator (11) and its cylindrical spring (12), positioned between the cover plate (2) and the upper part of the base (7) of the base body (1). 2a.- Plug socket with safety shutter, according to the previous claim, characterized in that the shutter (11) is of a prismatic shape and suitable dimensions to allow its placement under the cover plate (2) and to be able to slide, guided by its tabs (14) across the width thereof, said shutter (11) being provided with a ramp , descendant to the outside (20), at one end, and at the opposite end a ramp (21), descendant towards the interior, with two side walls (22), having its bottom (lia) open, in order to allow, when the obturator moves, the passage of the shank that has been supported on the ramp (21) or its walls (22), also being provided with a projection (23) on one of its sides, where the cylindrical spring will be housed ( 12), retained by the projection (23a), this cylindrical spring carrying out an expansion action that keeps the shutter (11), with its ramp zones (20) and (21), under the openings (13) / (13a) of the cover plate (2), preventing passage into the base body (1). 3a.- Plug socket with safety shutter, according to the preceding claim, characterized in that the cylindrical spring (12) of the shutter (11) is located at its opposite end against a vertical tabiquillo (24), located on the back of the plate of lid (2), said spring being perfectly located and held laterally, between the tabiquillos (24) and the appendix (23), both when it is in its expansion position, keeping the obturator (11) in the sealing position, and when it is in the compressed position, as the shutter (11) has been displaced to allow access to the inside of the base body (1). 4a. - Plug socket with safety shutter, according to claims Ia and 2a, characterized in that the shutter (11) has on one of its lower edges, under one of the side walls (22), an elongated rectangular socket (22a), which it will allow, when the pegs of the pins (26) and (27) have been correctly introduced, the sliding of the obturator (11) in its lateral movement, saving the locking flange (7b) located in the upper edge of the small partition (7) of the base body (1), flange (7b) that has held the obturator (11) in its initial sealing position. 5a. - Plug socket with safety shutter, according to claims Ia and 2a, characterized in that the accidental introduction of a foreign element (25) through one of the openings (13) / (13a), will cause the displacement in the rolling direction of the shutter (11), which will continue to prevent access to the interior of the base body (1), being immobilized by being fitted under the aforementioned opening (13) / (13a), the trailing edge (21a) of the inclined ramp (21) of the obturator (11) against the flange (21b) that the cover plate (2) possesses. 6a.- Plug socket with safety shutter, according to the preceding claim, characterized in that the accidental introduction of a foreign element (25) through the opening (13/13 a) opposite to that of the previous claim, will cause the displacement, also in rolling, the obturator (11) that will continue to prevent access to the interior of the base body (1), being immobilized by fitting the breakwater (20a) of the ramp (20) after the projection (20b) that the cover plate (2) has on its lower face, next to said opening (13) / (13a) and at the same time the lower rear part of the shutter (11) it fits against the locking flange (7b). 7a. - Plug socket with safety shutter, according to claims Ia to 3a, characterized in that in the correct action to carry out the connection of the plug (26) of cylindrical pins (18), introducing them through the openings (13) , these pins (18) will impact directly on the ramps (20) and (21) of the obturator (11), causing, by pressure, the displacement thereof in the longitudinal direction, overcoming the action of the cylindrical spring (12), and leaving open the passage towards the inside of the base body (1), so that the said cylindrical pins (18) interlock in the central area (8a) of the connection contacts (8). 8a.- Plug socket with safety shutter, according to the preceding claim characterized in that in the action for the connection of the pin (27) of flat pins (19), introducing them through the openings (13a), these pins (19) ) will impinge on the ramp (20) and on the side walls (22) of the ramp (21), thus being compensated the shortest distance between these flat pins (19), and therefore the same shutter (11) is valid for both types of spikes, also causing by pressure, the displacement of the shutter (11), which will leave open the passage towards the contacts (8) located inside the body base (1), interlocking these flat pins (19) in the internal clip (8b) of the contact (8). 9a. -Base plug with safety shutter, according to claim Ia, whose base body (1) has inside the tabiquillos (7) for the positioning of the connection contacts (8), characterized by being also provided with the tabiquillos (7a) for the positioning of the grounding contact (15), located under the opening (17) that for this purpose have the variants of cover plate (2b) and (2c), for base with grounding, presenting also the base the variants of cover plate of narrow module and rectangular contour (2) and (2b) and those of wide module and square contour (2a) and (2c), for which, the base will also present the corresponding variants of base bodies (1) and (Ib), for narrow module and (la) and (le) for wide module, while the base bodies (la) and (le) will be those arranged for the base variants with socket ground, being provided with tabiquillos (7a) for the positioning of the contact (15). 10a. - Plug socket with safety shutter, according to the previous claims, characterized in that the shutter (11) only exerts its closing action of the passage through the openings (13) / (13a), which give access to the electrical contacts ( 8), not closing, in the base versions with grounding, the access through the opening (17) to the contact (15), since no protection is necessary due to its neutral character.