PLUG BASE WITH SECURITY SHUTTER
DESCRIPTIVE MEMORY The present invention relates to a plug-in base, applicable to domestic electrical installations and the like, at low voltage, provided with a safety shut-off device, designed so that only the interior area where they are located can be accessed. contacts where the pegs of the pegs will fit when they are properly introduced, the two pegs in unison. The essential characteristics of this plug socket are described below. The possibility of accidentally accessing the interior of the body of a socket, with a metal object, such as a punch, a fork or any similar object within the reach of children, is a risk factor due to the concrete fact that there is a lamentable and serious domestic accident due to the action of the electric current. That is why, taking into account the existing basic standards regarding safety in low voltage electrical installations, it is necessary that the aforementioned
Sockets are provided with a safety device that prevents access to these aforementioned elements and can not be introduced unconsciously into the base, thus preventing them from touching the internal contacts. This safety device, however, will be designed to allow the 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, sufficiently takes care of the requirements of security and suitable connection, offering to install an element of total guarantee in its operation, to be placed in the facilities, especially domestic and similar, as previously It has been indicated. The obturator device is designed to be installed inside the base, below its upper plate, which plate has suitable openings for use in the connection of standardized plugs, known as "Swiss" or "Brazilian" type, pins provided with two cylindrical pins, located symmetrically with respect to an imaginary central axis of
symmetry, and a third spike, identical to the previous ones, for grounding, located on the axis of symmetry itself.
In this basic model for a plug known as "Swiss type" or "Brazilian type", the sealing device protects the incorrect or accidental access to the interior by the circular openings for the introduction of the corresponding dowels of the plug, intended for electrical connection. With regard to the third opening, intended for the passage of the pin that corresponds to the grounding of the electrical device, the shutter mechanism does not regulate the access by the same, since the ground contact located inside the base of the The plug is not connected to any electrical conductor and does not represent any danger.
In order to describe in detail the essential characteristics of the plug base 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 the aforementioned base. In said drawings, Figure 1 is a perspective view of the base, showing all of its components located at
explosion mode, and the location of each of them with respect to the rest; Figure 2 is a perspective view, and also with the elements located by way of explosion of the components that make up the security shutter device, but viewed below, that is, by its bottom face; Figure 3 is a view of the assembly, sectioned according to an imaginary vertical plane parallel to the plane passing through the centers of the entry holes of the electrical connection pins; Figure 4 is a view, through the lower face, of the obturator placed in its shutter, and in the closed position of the openings of the base; Figure 5 is a view complementary to the previous figure, of the obturator in the displaced position, allowing access through the openings of the base; Figure 6 is a view of the assembly, sectioned according to an imaginary vertical plane, perpendicular to the axis of symmetry and passing through the centers of the entry holes of the electrical connection pins. In this
figure represents an element, type punch, located to the outside and initiating its entry through an opening; Figure 7 is a section of the assembly, equivalent to that of the previous figure, showing the sequence of the introduction of an element through the opening of the base and coming to touch the shutter; Figure 7 bis is a detail, in larger size, of the contact zone between the element that is inserted and the obturator, according to Figure 7; Figure 8 is a section of the same assembly, similar to that of figures 6 and 7, but showing the element that has been introduced through the opening of the base resting on the obturator and moving it in a swinging direction, without allowing access inland; Figure 8 bis is a detail, in larger size, of the contact zone between the introduced element and the displaced obturator, according to Figure 8; Figure 9 is a view similar to that of the sectioned assembly, of Figures 7 and 8, but with the element introduced through the other opening of the base; Figure 9 bis is a detail, in larger size, of the contact area between the element introduced through
of the other slot and that has displaced the shutter, according to Figure 9; Figure 10 is a view of the assembly, sectioned according to the section plane of figures 6 to 9. In this figure the two connection pins are represented according to the dihedral projection of the section made. Both pins are located above the base and in the corresponding place to be introduced through the corresponding openings; Figure 11 is a view similar to that of the previous figure, of the sectioned assembly, but with the pins beginning to enter their corresponding openings and touching the upper face of the shutter; and Finally, Figure 12 is a view similar to the two previous figures, and in which the connecting pins have already displaced the obturator and have been fitted in the contacts of the base. According to the drawings that have been enumerated and with the initial description, the plug socket with safety shutter object of the present invention is essentially characterized by being constituted by a base body (1) on which a cover plate will fit. (2), both remaining
perfectly subject by the joint action of closing lugs (3) of the cover plate (2), which are fixed by pressure on the corresponding lateral projections (4) that the base body (1) has inside its upper edge. The cover plate (2), of rectangular profile, has on its upper face an elongated hexagonal recess (2a), in whose bottom the three circular openings are arranged, in the normalized position for the sockets of the "Swiss" type or "Brazilian". Two of these openings (5) are located symmetrically with respect to the vertical imaginary plane of symmetry, of reference AA (See Figure 1), and through them the appropriate cylindrical pins (6) that will establish the electrical connection will be introduced. The third circular opening (7), positioned symmetrically on said vertical plane AA, presents the introduction of the grounding pin, not shown in the drawings. This opening is located in the opposite half of the bottom of the cavity (2a). In its lower face, the cover plate (2) has a wide smooth area (8) limited by the lugs (3), two of which are stiffened by two triangular flanges (9).
Said lugs (3) also serve as a guide for the assembly of the shutter (10) and of the shutter plate (11). This shutter plate (11) has a practically rectangular contour and coincides with the smooth zone (8) of the lower face of the cover (2), being provided with two angular recesses (12), coinciding with two of the closing lugs ( 3) and the side flanges (13) on one side and other smaller flanges (14) on the opposite side, which will position this shutter plate (11) against the inside of the upper part (15) of the side walls of the base body (1). ). The shutter plate (11) is fixed and fixed when resting on the inner walls (16) of the base body (1) .. The shutter plate (11) has two circular openings (17), coinciding in dimensions and position with the openings (5) that the cover plate (2) has for the passage of the electrical connection pins (6), and a third circular opening (18) coinciding with the opening (7), for grounding. On its lower face, the shutter plate (11) has hollow cylindrical projections, two of them coinciding (19) around the openings (17) and the third (20), of
lower height, coinciding around the hole (18) grounding. Likewise, the shutter plate (11) has inside it a rectangular projection (21), provided with a support bracket (22), which will serve as a stop and positioner of a cylindrical spring (23) of the shutter (10). This obturator (10) is of a substantially rectangular shape, its width coinciding with the inner width of the shutter plate (11), so that, placed inside it, as indicated in figures 4 and 5, it is guided on its sides, being able to move along said shutter plate (11). The obturator (10) has two circular areas (24) with an inclined surface, in the form of a ramp, as well as an elongated central opening (25) as a housing, where the cylindrical spring (23) will be located, which, for its expansive action, will maintain at all times the shutter located in the area of shutter plate (11) where the two openings (17) are located, so as to close the possible access through said openings (17) into the interior of the base body (1) of the device. Thus, when joining and being fixed and subject to pressure, the cover plate (2) and the cover plate (11),
the shutter (10) is located inside, being able to move from the position in which it obstructs the access through the openings (5) and (17), according to figure 4, to the position in which it leaves said access free, according to Figure 5. This displacement will occur only when the two electrical connection pins (6) are inserted through the openings (5) of the lid plate (2) in unison, these pins pressing on the inclined surface in ramp of the two circular zones (24) of the obturator (10), causing, by pressure, the displacement of said obturator, overcoming the action of the cylindrical spring (23) that kept it in its initial position of obturation. This action is represented in figures 10 to 12. When the previously described displacement of the obturator (10) is made, the opening (24a) arranged next to one of the circular areas (24) will be located under the corresponding opening (5) and the cover plate (2) and its corresponding opening (17) of the shutter plate (11), allowing free insertion by them of the pin (6) of the pin. With the obturator (10) in its permanent initial sealing position, according to Figure 4, and
maintained therein by the action of the cylindrical spring (23), the access to the interior of the base body (1) remains closed. If an element (26) is accidentally inserted through one of the circular openings (5) of the cover plate (2), which action is represented in sequence in figures 6 to 8, this element (26) will impinge on a of the circular areas (24) of inclined surface of the obturator (10), without being able to move it, but only, due to the unilateral pressure exerted, will cause its displacement in the swinging direction (fig.8), making it fit over the opening (17) of the shutter plate (11), also preventing passage into the base body (1). Inside this base body (1) there are located the tabiquillos (16) that will maintain positioned and fixed the shutter plate (11) on them supported, as well as other tabiquillos (27) that delimit the zones of accommodation of the electrical contacts ( 28) and the contact (29), identical to the previous ones, for the ground connection. These electrical contacts (28), and ground (29), are of the type of elastic clamp, which is fixed on the top of each clamping body (30) in which, the cables to be screwed are introduced, operation that is executed by means of the action of screws of embornado (31).
Having sufficiently described the plug base with safety shutter object of the present invention, 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 of the materials used, will not alter the essential nature of the device. the same, being summarized in the following claims.