FR3006853A1 - BOX IN PARTICULAR FOR ELECTRICAL EQUIPMENT USED HORIZONTALLY AND VERTICALLY - Google Patents

Abstract

Box (10), comprising a main door (16) pivotable about an axis (36), a secondary door (18) slidably mounted on the main door for access to a predefined region (110) of the interior ( 14) of the cabinet. The main door has a latch (56) for locking the secondary door (18), and a lumen (80) shaped to guide an operating member (66) connected to the latch (56) between a first position in which the latch locks the secondary door (18) in the closed position and a second position in which the latch allows the opening of the secondary door, in a path of which at least a portion extends in a direction (88) inclined with respect to said axis ( 36), when the operating element (66) moves from its first to its second position. The opening of the secondary door thus requires a voluntary action against gravity, whether the cabinet is positioned "standing" or "lying down".

Description

The present invention relates to the field of enclosures, in particular those intended to house human-machine interfaces, for example interfaces intended to control equipment of electricity distribution network, such as remote control interfaces of the switches.

A remote control interface of the switches is a telecontrol device used for the remote control of switches using the analog or digital radio network, or the switched telephone network, or a specialized telephone connection, the GSM / GPRS network, or a IP network. STATE OF THE PRIOR ART In the field of cabinets intended to house human-machine interfaces, there is a need for cabinets offering at least two access levels, namely a first level, called "level 1", in which only a part of the interface such as a control panel is accessible, and a second level, called "level 2", in which the entire interface is accessible.

This requires that such a cabinet be equipped with a main closure device allowing alternately to protect and give access to the entire interface for level 2 access, as well as a closure device secondary to alternatively protect and provide access to only part of the interface for level 1 access.

In the case of switch remote control interfaces, level 1 is generally accessible to the operating agents of the electricity distribution network while level 2 is reserved for maintenance agents only.

For the sake of simplicity of use, it is further desirable that upon opening of the main closure device, the secondary closure device automatically cease to protect the aforementioned part of the interface to ensure accessibility of this part of the interface. It is also desirable to limit the risk of inadvertent movement of the secondary closure device while the main closure device is open. For the sake of compactness of the cabinet and ease of use, it is further desirable that the main and secondary closure devices are both permanently connected to a chassis of the cabinet. It is indeed desirable to avoid the use of a removable device, which requires space to store the device when it opens and requires tedious dismantling and reassembly operations. In particular, there is a need for a cabinet which can be used in two positions characterized respectively by orientations of the box orthogonal to each other, typically a "standing" position corresponding to a so-called "vertical" orientation and a "lying" position. Corresponding to a so-called "horizontal" orientation. SUMMARY OF THE INVENTION The object of the invention is in particular to provide a simple, economical and effective response to these needs. It proposes for this purpose a box, comprising: - a frame defining an interior space of said box, - a main door mounted on said frame and movable between an open position and a closed position by rotation about a pivot axis intended to extend vertically when said box is arranged in a first orientation called "vertical orientation" and intended to extend horizontally when said box is disposed in a second orientation called "horizontal orientation" orthogonal to said first orientation, and - a secondary door mounted on said main door and movable between an open position in which said secondary door allows access to a predefined region of said interior space of the cabinet through an orifice formed in said main door, and a position in which said secondary door closes said orifice. According to the invention, said main door comprises: - a locking latch for locking said secondary door in the closed position, and - support means for supporting and guiding said locking latch, and comprising guiding means for an actuating member connected to said locking latch, said guiding means being shaped to guide said actuating member between a first position in which said latch latch blocks said secondary door in the closed position and a second position in which said latch of locking allows the opening of said secondary door. In addition, said guide means are shaped to guide said operating element along a path of which at least a portion extends in a direction inclined relative to said axis of pivoting of said main door, when said operating element moves from its first to his second position.

The invention thus provides a housing that can be used in two orthogonal orientations with each other, in each of which the opening of the secondary door requires a displacement of an element, called an "operating element", along an upward trajectory and thus going to the against the force of gravity, so that such an opening requires voluntary action on the part of an agent. The aforementioned ascension trajectory is in fact defined by the portion of the trajectory of the operating element oriented in a direction inclined with respect to the axis of pivoting of the main door. In a preferred embodiment of the invention, said latch latch includes a latch latch member, and said guide means is shaped to guide said operating member between said first position thereof and a third position in which said latch latch locks said secondary door in the closed position, and said latch latch member occupies a position for locking said latch latch. The latch locking member thus locks the secondary door in its closed position. In the preferred embodiment of the invention, said frame comprises a retaining means of said latch locking member for locking said main door in the closed position when said operating element is in said third position. The latch locking member thus also locks the main door in its closed position.

According to a preferred feature of the invention: - said guide means are formed of a light formed in said main door and comprising first and second sections extending orthogonally to said pivot axis and connected to one to the another by an oblique section defining said portion of the trajectory of the operating element which extends in said direction inclined relative to said pivot axis, and - said operating element is engaged in said light. The aforementioned light thus allows access to the locking latch from outside the cabinet while the latch can be disposed inside the cabinet.

In this case, one of said first and second sections advantageously comprises a notch arranged substantially in the extension of said oblique section of said light and defining said first position of the operating element. According to a preferred feature of the invention, said locking latch comprises a hook which cooperates with a hook secured to said secondary door so as to retain said secondary door in the closed position when said operating element is in any one of said first and third positions, and so as to allow the opening of said secondary door when said operating element is in said second position.

Thus, the locking latch is positioned so that the hook of the locking latch engages with the hook of the secondary door to lock the secondary door in the closed position when the operating element is in one of the latches. from his first and third positions. On the other hand, when the operating element is in its second position, the locking latch is positioned so that the hook of the locking latch is no longer engaged with the hook of the secondary door so as to allow the opening of the secondary door. Furthermore, the box preferably comprises means for retaining said main door in the closed position, said retaining means being independent of said locking latch.

In the particular case where the frame comprises a retaining means of the latch locking element as described above, the retaining means of the main door can maintain the latter in the closed position even when the element of actuation of the latch is in one of its first and second positions, and that the retaining means of the latch locking member is inoperative. According to a preferred feature of the invention, said secondary door is slidably movable in a direction substantially parallel to said pivot axis of said main door. The possibility of opening and closing the secondary door by a simple sliding movement of the latter makes the cabinet particularly compact. In this case, said support means furthermore advantageously comprise: a first guide secured to a guiding pin engaged in a lumen formed in said latching latch so that said guiding pin moves along said latch lumen; when said actuating member moves from one position to another of said first, second and third positions, and a second guide arranged between said first guide and said guide means of the operating element, and delimiting a passage space for said latch latch so as to allow a movement of the locking latch parallel to said pivot axis of said main door. According to a preferred feature of the invention, said main door comprises ventilation openings extending in a direction inclined with respect to said pivot axis of said main door.

The ventilation openings thus operate in a comparable manner when the cabinet adopts its "vertical" orientation and when it adopts its "horizontal" orientation. For this purpose, the direction of the ventilation openings is preferably inclined substantially at 45 degrees with respect to said pivot axis.

Furthermore, the cabinet preferably comprises a retaining rod articulated on said frame on the one hand and on said main door on the other hand so as to limit the angular travel of said main door when opening the latter. The retaining rod thus simplifies and secures the manipulation of the main door, in the two possible orientations of the cabinet. Furthermore, the box preferably comprises support means for at least one human-machine interface system, for example for controlling electrical distribution network equipment, such as a remote control interface of the switches.

The box according to the invention can indeed be advantageously used to house a man-machine interface. In this case, the predefined region of the interior space of the cabinet, accessible by the secondary door, is preferably used to house a control panel of said interface.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood, and other details, advantages and characteristics thereof will appear on reading the following description given by way of nonlimiting example and with reference to the appended drawings in which: Figure 1 is a schematic perspective view of a box according to a preferred embodiment of the invention, the main door is in the closed position; Figure 2 is a schematic perspective view of the cabinet of Figure 1, the main door is in the open position; Figures 3 to 5 are respectively enlarged views of details III, IV and V of Figure 1; Figures 6 and 7 are respectively enlarged views of details VI and VII of Figure 2; Figures 8a and 8b are schematic perspective views of the locking latch of the cabinet of Figure 1, shown isolated; Figures 9a and 9b are schematic perspective views of a gripping member and retaining the secondary door of the box of Figure 1, shown isolated; Figure 10 is a schematic exploded perspective view of a portion of the cabinet of Figure 1, illustrating in particular the main and secondary doors; Figure 11a is a schematic view of the front of the cabinet of Figure 1, illustrating the outer face of said main door, when the locking latch is in its third position corresponding to the level 0 accessibility; Figure 11b is a schematic front view of said main door of the cabinet of Figure 1, illustrating the inner face of this main door, when the locking latch is in its third position corresponding to the level 0 accessibility; Figure 12a is an enlarged view of detail Xlla of Figure 11a; FIG. 12b is a view on a larger scale of the detail Xllb of FIG. 11b; Figure 13a is a schematic view of the front of the cabinet of Figure 1, illustrating the outer face of said main door, when the locking latch is in its first position corresponding to the level 2 of accessibility; Figure 13b is a schematic front view of said main door of the cabinet of Figure 1, illustrating the inner face of the main door, when the locking latch is in its first position corresponding to the level 2 of accessibility; Figure 14a is an enlarged view of the detail XlVa of Figure 13a; Figure 14b is an enlarged view of the detail XlVb of Figure 13b; Figure 15a is a schematic view of the front of the cabinet of Figure 1, illustrating the outer face of said main door, when the locking latch is in its second position corresponding to the level 1 accessibility; Figure 15b is a schematic front view of said main door of the cabinet of Figure 1, illustrating the inner face of the main door, when the locking latch is in its second position corresponding to the level 1 accessibility; Fig. 16a is an enlarged view of detail XVIa of Fig. 15a; Figure 16b is an enlarged view of detail XVIb of Figure 15b. In all of these figures, identical references may designate identical or similar elements. DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT FIGS. 1 and 2 illustrate a box 10, for example intended to house equipment for an electricity distribution network (not visible in the figures for the sake of clarity). The box 10 is for example a remote control interface box 400 A switches, or ITI, including such as described in the patent application FR 13 01001 filed April 30, 2013 and entitled "fixing a battery of variable size in an electric box ". The cabinet 10 comprises a frame 12 delimiting an interior space 14 of the cabinet, a main door 16 pivotally mounted on the frame 12, and a secondary door 18. The frame 12 includes, for example, support elements for equipment for a distribution network. electricity, such as a remote control interface of the switches. These support elements comprise for example rails 19a, pins 19b, and a shelf 19c (Figure 2). The frame 12 and the main door 16 are for example made of metal.

By way of example, the frame 12 is generally in the form of a rectangular parallelepiped, and thus comprises a bottom wall 20 (FIG. 1), an upper wall 22 (FIG. 2), and two lateral walls 24a and 24b (FIGS. 1 and 2). and a bottom wall 26 (Figure 2). The denomination of the walls forming the frame 12 is arbitrarily chosen with reference to a "standing" or "vertical" positioning of the box 10 as illustrated in FIG. 2, but the box is also intended to adopt a "lying" or "lying" positioning. horizontal ", in which case the side walls 24a and 24b are respectively in the low and high positions, and the lower walls 20 and upper 22 in lateral positions, so that the opening of the main door 16 is then performed by a rotation down this door.

The main door 16 comprises, for example, a plate 28 provided with flanges 30a, 30b, 30c, 30d (FIG. 2) extending substantially orthogonally to the plate 28 so as to define the thickness of the main door 16 and intended to come superimpose on corresponding edges 32a, 32b, 32c, 32d of the frame 12. The main door 16 is advantageously articulated on a side wall 24a of the frame 12 by means of hinges 34 (FIGS. 2 and 6) defining a pivot axis 36 of the main door 16 and allowing a rotational movement of the main door 16 between a closed position (Figure 1) and an open position (Figure 2). The secondary door 18 comprises a plate 38 which is preferably made of a transparent material such as glass or plastic. This plate 38 is mounted in rails 40a, 40b (FIGS. 2 and 10) fixed on an inner face of the plate 28 of the main door on either side of a substantially rectangular orifice 41 (FIG. to allow sliding of the secondary door 18, preferably parallel to the pivot axis 36, between a closed position (Figures 1, 2, 12a and 12b) in which the plate 38 closes the orifice 41 and a position of opening (Figures 15a and 15b) in which the plate 38 is at least partially offset from the orifice 41. The secondary door 18 further comprises a handle 42 projecting outwardly of the cabinet (Figure 1) intended to allow an agent for manipulating the secondary door 18, a hook 44 (FIG. 2) for blocking the secondary door 18 in the closed position, as will become more clearly apparent in the following, and a protective wall 46. The handle 42, the hook 44 and the protective wall 4 6 are for example formed in the same room, shown isolated in Figures 9a and 9b, thus forming a member 48 for gripping and retaining the secondary door.

More specifically, this gripping and retaining member 48 takes the form of an oblong metal plate 50 having at one of its longitudinal ends an enlarged portion 52 provided with a slot 54 open towards the other longitudinal end of the plate 50 so as to define the hook 44. In addition, the plate 50 has a first lateral rim curved in a first direction and forming the handle 42, as well as a second opposite lateral edge curved in an opposite direction and forming the protective wall 46. The box 10 comprises a locking latch 56 (Figure 2) intended in particular to ensure the locking of the secondary door 18 in the closed position, as will become more clearly apparent in the following.

The locking latch 56, shown isolated in FIGS. 8a and 8b, takes the form of an oblong metal plate 58, presenting at one of its ends a longitudinal slot 60, and at its other end, an end tab 62 provided with an eye 64 and offset from the plane of the plate 58. The locking latch 56 further comprises an actuating element 66 (Figures 1 and 8a) taking for example the shape of a pin extending into protruding from a face of the plate 58, near the end tongue 62 and in the opposite direction to the latter, and a tab forming a hook 68 (Figures 8a and 8b) extending substantially orthogonal to the plate 58 from a side edge thereof and in the opposite direction to the pin forming the actuating element 66, for example near the light 60.

As shown in Figures 2 and 10, the main door 16 further comprises a first guide 70 fixed to the plate 28 forming the main door 16 and associated with a guide pin 72 connecting the first guide 70 to said plate 28. The door main 16 includes a second guide 74 also fixed to the plate 28 and defining therewith a passage space for the locking latch 56 providing a game in a direction parallel to the pivot axis 36. In addition, the flange 30a of the main door 16 located on the opposite side to the pivot axis 36 has a slot 76 (Figures 1 and 4). The corresponding edge 32a of the frame 12 comprises a similar slot 78 (FIG. 1), opposite which the slot 76 of the main door 16 is positioned when the latter is in the closed position, to allow the passage of the end tongue 62 of the locking latch 56 jointly through these two slots 76 and 78. The main door 16 further comprises a light 80 (Figures 1 and 3) for receiving the actuating element 66. This light 80 is formed within of the plate 28 forming the main door and comprises two substantially straight sections 82 and 84, respectively called "first section" and "second section" in the following, and which extend orthogonally to the pivot axis 36, as well as an oblique section 86 which extends in a direction 88 inclined relative to the pivot axis 36 so as to connect to each other the first and second sections 82 and 84 (Figure 3). The light 80 has a notch 87 provided in the extension of the oblique section 86 adjacent to the first section 82. The notch 87 defines a first position P1 of the operating element 66, while the end of the second section 84 opposite to the oblique section 86 defines a second position P2 of the operating element 66, and that the end of the first section 82 opposite the oblique section 86 defines a third position P3 of the operating element 66, in the terminology of the invention. The main door 16 also includes two retaining latches 90a, 90b for retaining the main door in the closed position (Figures 2 and 10). These latches are slidably mounted in a direction orthogonal to the pivot axis 36 and parallel to the plate 28 forming the main door 16. These latches each comprise an end tongue 92a, 92b intended to engage in a corresponding slot 94a 94b formed in the edge 32a of the frame 12 (Figure 2). The main door 16 preferably comprises return means which urge the two retaining latches 90a, 90b in the direction opposite to the pivot axis 36, that is to say in the direction of the slots 94a, 94b when the door main 16 is in the closed position. The main door 16 further comprises an eye 96 which is positioned facing an eye 98 of the frame 12, for example arranged at the edge 32a extending in the extension of the lower wall 20 of the frame, when the main door 16 is in the closed position, to allow the establishment of a seal through these two eyes 96 and 98 so as to prevent the opening of the cabinet 10 by an unauthorized person. Furthermore, the box 10 comprises a retaining rod 100 (FIGS. 2 and 7), a first end of which is articulated to the frame 12, for example to the edge 32d of the lower wall 20 of this frame, and whose second end comprises a pin 102 engaged in a light 104 extending orthogonally to the pivot axis 36 and parallel to the plate 28 forming the main door 16. The retaining rod 100 thus limits the pivoting of the main door 16 by abutment of the pin 102 in the end of the light 104 located on the side of the pivot axis 36. The light 104 is for example formed in a bracket 106 fixed to the plate 28. The main door 16 further comprises vents 108 which preferably extend in a direction inclined at 45 degrees relative to the pivot axis 36, so as to have comparable efficiency, that the cabinet adopts a "vertical" orientation or a orientat "horizontal" ion.

Figures 2 and 10 provide an understanding of the assembly of the main 16 and secondary 18 doors from the elements described above. In particular, the locking latch 56 is placed against the inner face of the plate 28 forming the main door 16 so that the pin forming the operating element 66 is engaged in the light 80 of the plate 28, then the guides 70 and 74 are fixed to the plate 28 so as to cover the latch 56 and so that the guiding pin 72 connecting the first guide 70 to the plate 28 is engaged in the slot 60 of the latch 56, and that the second guide 74 hold the latch 56 substantially in contact with the plate 28.

Figures 11a to 16b illustrate the operation of the cabinet 10. As an illustration, this box 10 is shown in its "vertical" position but its use would be similar in the "horizontal" position. FIGS. 11a to 12b show the box 10 in a first state corresponding to a so-called "level 0" level of accessibility, in which the main 16 and secondary 18 doors are in the closed position, so that only visual access is possible to a predefined region 110 of the interior space 14 of the cabinet 10, located opposite the secondary door 18, because of the transparent nature of the plate 38 forming this secondary door. When the box 10 contains equipment for electricity distribution network, such as a remote control interface of the switches, this predefined region 110 is preferably intended to house a control panel of said equipment. Visual indicators, lights or screens, relating to the operation of the equipment, can thus be monitored through the transparent secondary door 18.

In this first state, the locking latch 56 is positioned so that the operating member 66 is in its third position at the end of the first section 82 of the lumen 80 (FIG. 12a) and so that the tab end 62 (FIGS. 12a and 12b) passes through respective slots 76 and 78 of the main door 16 and the frame 12 (FIG. 2). The locking latch 56 thus locks the main door in the closed position. The slot 78 of the frame 12 thus forms a "retaining means" of the end tongue 62 in the terminology of the invention. The locking latch 56 can also be locked by means of a padlock 112 whose handle 114 passes through the eye 64 of the end tongue 62. For this reason, the end tongue 62 forms a "Latch lock member" in the terminology of the invention.

In addition, the hook 68 of the latch 56 is engaged with the hook 44 of the secondary door 18 so as to prevent the sliding of the latter and to block in its closed position (Figure 12b). In order to further secure the cabinet 10, a seal 116 can be put in place through the eyes 96 and 98. Figures 13a to 14b illustrate the passage of the cabinet 10 to a second state corresponding to a level of accessibility called "level 2 "allowing access to the entire interior space 14 of the cabinet while ensuring the maintenance of the secondary door 18 in the closed position. This level of accessibility is typically reserved for maintenance personnel. The transition to this second state from the first state described above can be performed as follows. The seal 116 and the padlock 112 are first removed, if necessary.

Then, the operating member 66 is moved along the first section 82 of the lumen 80 from its third position to its first position within the slot 87 (Fig. 14a). This displacement causes a displacement of the assembly of the locking latch 56, during which the guiding pin 72 slides along the slot 60 of the locking latch 56 and thus participates with the second guide 74 in guiding this latch. The locking latch 56 thus reaches a position (FIG. 14b) in which the end tongue 62 no longer passes through the respective slots 76 and 78 of the main door 16 and the frame 12 and in which the hook 68 of the locking latch 56 continues to be engaged with the hook 44 of the secondary door 18 so as to prevent the sliding of the latter.

To open the main door 16, it is then sufficient to actuate the retaining latches 90a, 90b in the direction of the pivot axis 36 to momentarily disengage the respective end tongues 92a, 92b of these latches out of the slots 94a, 94b of the frame 12, and simultaneously pull on the main door 16 so as to cause the pivoting thereof around the pivot axis 36. The angular travel of the main door 16 is then advantageously limited by the retaining rod 100 The return of the box 10 to the first state corresponding to the "level 0" accessibility from the second state corresponding to "level 2" can be operated by following the steps described above in the reverse order. Figures 15a to 16b illustrate the passage of the cabinet 10 to a third state corresponding to a level of accessibility called "level 1" allowing access only to the predefined region 110 of the interior space 14 of the cabinet while ensuring the maintenance of the main door 16 in the closed position. When the box 10 contains equipment for electricity distribution network, such as a remote control interface of the switches, this "level 1" accessibility is advantageously intended to allow an actuation of integrated control means to the control panel housed in the predefined region 110. This level of accessibility is thus typically intended for operating personnel. The transition to this third state from the first state described above can be performed as follows. The padlock 112 is first removed, if necessary.

Then the operating element 66 is moved successively along the first section 82, the oblique section 86, and the second section 84 of the light 80 to go from its third position to its second position (Figure 16a). This displacement causes a displacement of the assembly of the locking latch 56, during which the guiding pin 72 slides along the light 60 of the locking latch 56 and thus participates in guiding this latch together with the second guide 74. The locking latch 56 thus reaches a position (FIG. 16b) in which the end tongue 62 no longer passes through the respective slots 76 and 78 of the main door 16 and the frame 12 and in which the hook 68 of the locking latch 56 is no longer engaged with the hook 44 of the secondary door 18 so as to allow the sliding of the latter to its open position illustrated in Figures 15a and 15b. In this open position, the door is retained by the handle 42 which abuts against the lower edge of the orifice 41 provided in the plate 28. The main door 16 continues to be held in the closed position by the latches retaining 90a and 90b, and the seal 116 can be held in place if necessary. The return of the box 10 to the first state corresponding to the "level 0" accessibility from the third state corresponding to "level 1" can be operated by following the steps described above in the reverse order after having replaced the secondary door 18 in the position of sliding closure of this door in the direction of the latch 56. In the terminology of the invention, the light 80 constitutes "guide means" of the operating element 66, while the assembly formed by the light 80 and the guides 70 and 74 and the guide pin 72 constitutes "support means" for the latch 56. It is remarkable that the light 80 is shaped so that the trajectory followed by the element 66 to reach its second position (Figure 16a), from any of these first and third positions, comprises an upward portion corresponding to the oblique section 86, whatever e is the "vertical" or "horizontal" orientation of the cabinet 10. Indeed, in the case of a "standing" positioning of the cabinet, the upward portion of the trajectory of the operating element 66 corresponds to a displacement towards the top and to the right in the illustrated example, whereas in the case of a "lying" positioning of the cabinet, the upward portion of the trajectory of the operating element 66 corresponds to a displacement upwards and towards the left in the example shown. The unlocking of the secondary door 18 thus systematically requires a voluntary action on the part of an agent, going against the force of gravity.

Claims (12)

REVENDICATIONS1. Box (10), comprising: a frame (12) defining an interior space (14) of said box, a main door (16) mounted on said frame and movable between an open position and a closed position by rotation around a pivot axis (36) intended to extend vertically when said box is arranged in a first orientation called "vertical orientation" and intended to extend horizontally when said box is arranged in a second orientation called "horizontal orientation" orthogonal to said first orientation, - a secondary door (18) mounted on said main door (16) and movable between an open position in which said secondary door allows access to a predefined region (110) of said interior space (14). box through an orifice (41) formed within said main door (16), and a closed position in which said secondary door (18) obturates e said orifice (41), characterized in that said main door comprises: - a locking latch (56) for locking said secondary door (18) in the closed position, and - support means (70, 72, 74 , 80) for supporting and guiding said locking latch (56), and including guiding means (80) for an actuating member (66) connected to said latch latch, said guiding means being shaped to guide said latch an actuating member (66) between a first position (P1) in which said latch latch secures said secondary door (18) in the closed position and a second position (P2) in which said latch latch permits opening of said door secondary, said guide means being shaped to guide said operating element (66) in a path of which at least a portion extends in a direction (88) inclined relative to said pivot axis (36) of the ladi the main door (16), when said operating element (66) moves from its first (P1) to its second position (P2). The enclosure of claim 1, wherein said latch latch (56) includes a latch latch member (62), and said guide means (80) is shaped to guide said latch member (66) between said first latch member (62). position (P1) thereof and a third position (P3) wherein: - said latch (56) locks said secondary door (18) in the closed position, and - said latch lock member (62) occupies a position in which the latter allows the locking of said locking latch (56). 10 A cabinet according to claim 2, wherein said frame (12) includes means (78) for retaining said latch locking member (62) for locking said main door (16) in the closed position when said latch member maneuver (66) is in said third position (P3). 15 A cabinet according to claim 2 or 3, wherein - said guide means is formed of a lumen (80) formed within said main door (16) and comprising first (82) and second (84) sections which extend orthogonally to said pivot axis (36) and which are connected to each other by an oblique section (86) defining said portion of the path of the operating member (66) which extends along said direction (88) inclined with respect to said pivot axis (36), and - said operating member (66) is engaged in said lumen (80). 2 5 5. Box according to claim 4, wherein one (82) of said first and second sections comprises a notch (87) arranged substantially in the extension of said oblique section (86) of said light (80) and defining said first position (P1) of the operating element (66). 6. Box according to any one of claims 2 to 5 taken in combination with claim 2, wherein said locking latch (56) comprises a hook (68) which cooperates with a hook (44) integral with said secondary door ( 18) so as to retain said secondary door in the closed position when said operating element (66) is in any one of said first (P1) and third (P3) positions, and so as to allow the opening of said door secondary when said operating element is in said second position (P2). 7. Box according to any one of claims 1 to 6, comprising means (90a, 90b) for retaining said main door (16) in the closed position, said retaining means being independent of said locking latch (56). 8. Box according to any one of claims 1 to 7, wherein said secondary door (18) is slidably movable in a direction substantially parallel to said pivot axis (36) of said main door (16). The enclosure of claim 8, wherein said support means further comprises: a first guide (70) integral with a guide pin (72) engaged in a lumen (60) formed in said locking latch (56); ) so that said guiding pin (72) moves along said latch latch lumen (60) when said operating member (66) moves from one position to another of said first (P1) second (P2) and third (P3) positions, and - a second guide (74) arranged between said first guide (70) and said guide means (80) of the operating element, and defining a passage space for said latch locking device (56) to allow movement of the latch latch parallel to said pivot axis (36) of said main door (16). 10. Box according to any one of claims 1 to 9, wherein said main door (16) comprises vents (108) extending in a direction inclined relative to said pivot axis of said main door. 11. Box according to any one of claims 1 to 10, comprising a retaining rod (100) articulated on said frame (12) on the one hand and on said main door (16) on the other hand so as to limit the angular stroke of said main door when opening the latter. 12. Box according to any one of claims 1 to 11, comprising support means (19a, 19b, 19c) for at least one human-machine interface system, such as a remote control interface of the switches.