ES2260822T3 - CABLE CLAMP AND ELECTRICAL EQUIPMENT EQUIPPED WITH SUCH CABLE CLAMP. - Google Patents

Abstract

THIS SUBJECTABLE IS OF THE TYPE THAT CARRIES A ROD FOR THE ELECTRICAL CABLE TO BE CONNECTED TO THE ELECTRICAL DEVICE IN QUESTION. ACCORDING TO THE INVENTION, TO APPLY, IN THE APPLICATION, TO THIS ELECTRICAL CABLE (23), ONE OR OTHER OF AT LEAST TWO DIFFERENT GUIDELINES, THE SUBJECTABLE (26) CARRIES, IN ONE PIECE AT LEAST TWO RODS (28A, 28B) WHOSE LIFTING ADDRESSES ARE THE SAME DIFFERENT, WITH, FOR FIXING TO THE BOX (11) OF THE ELECTRICAL DEVICE (10) IN QUESTION, AT LEAST ONE FIREPLACE (30). APPLICATION IN PARTICULAR, IN THE MOVES OF MOBILE MULTIPLE TAKES.

Description

Cable clamp and electrical appliance equipped with such cable clamp.

The present invention is referred to in a manner general to electrical appliances whose users have to equip them, themselves, of an electric cable for putting in functioning.

Even though they can be used equally in a fixed position or installation, it is, in the most usual case, of mobile electrical appliances, such as, for example, sockets or multi-socket plug bases.

The rules in force in this regard require that the box of these electrical appliances be equipped with a device retention, commonly referred to as a cable clamp device, which, for obvious security reasons, must be able to ensure strong retention of the electric cable in the case of that, accidentally or involuntarily, it becomes subject to a traction and / or a torsion that can cause, in case Otherwise, the boot.

One such cable clamp device it comprises, in the most frequent case, a simple appropriate cap for a device for tightening the electric cable.

The rules require that this device tighten affect the sheath of insulating material comprising usually the electric cable, as is the case in cables flexible electric.

These oblige, consequently, to meet a certain number of other requirements, such as following: how to perform the protection of the electric cable as far as traction and torsion are concerned, it must be easy to recognize, the cable clamp device, or at least one of its constituents, and this consists, in the most frequent case, in a plate or on a sole that underpins or serves as a electric cable counter-stop when this is tightened by the cap, must be incorporated or fixed permanently to one of the constituent parts of the device electric in question, or, more precisely, to one of the parties constitutive of the casing or box thereof; the device of cable tightening must be adaptable to different types of susceptible electrical cables used in practice, and their effectiveness should not depend on the set of constituent parts of the electrical device box; the clamping device of cable must be of insulating material or comprise a protection insulator for those of its constituents that are made of metal; Y the latter, which include eventual screws of tighten, they must be isolated from the ground circuit correspondent.

It is, on the other hand, that, in order to facilitate the use of the electrical appliance considered, it is desirable that the output of your electric cable can be made following, at choice, one or another of several orientations different.

So, for example, in the Request for European Patent No. 0681248, which refers to a connector, has been provided that this output is done axially or laterally.

To do this, a single piece that comprises laterally opercles susceptible to get down, one of which is destined to be removed for a side outlet of the electric cable, which, consequently, does not constitutes a cable clamping device to the extent that, On the one hand, it does not satisfy at least certain requirements remembered here in the above, and in that, on the other hand, on the contrary, it participates in the constitution of the cashier's connector in question.

When, being a clamping device of real cable, and it is contemplated to have the possibility of having several possible orientations for the electric cable, you can to think, not to have to use equally more than one piece, in retaking the usual cap in the matter, and in anticipating for him several possible implantations in the device box electrical, following the guidelines that must be satisfied to the electric cable

This arrangement leads to multiply so the fixing points to be provided for the bonnet.

On the other hand, it does not allow to satisfy with all security one of the requirements remembered here in the above.

Indeed, if the electrical appliance is supplied with the cap of your cable clamping device mounted on a certain good of their positions, and if the user wants the electrical cable output is done following an orientation that does not corresponds to this position, it is not necessarily evident to he who must disassemble this cap and place it in position corresponding to the orientation you have chosen for the cable electric.

There is, therefore, in this case, the risk of that the cable clamp device is not put into practice effective way, to the detriment of security.

The present invention aims at a in general, a provision that allows, on the contrary, to provide of several possible orientations for the electric cable, at the same time that all the requirements that have to be met in matter of cable clamping devices.

More precisely, it has, first, for object a cable clamp device that is intended to equip the box of any electrical appliance and that is of the gender comprising a cap of a device tighten the electrical cable to be attached to this device electric, such that this cable clamping device it is characterized, in a general way, that, in order to impose on the electric cable in question, as desired, a another of at least two different orientations, this one comprises, in one piece, at least two caps whose addresses of elongation or longitudinal extension are different from each other, to know: a cap named here, for simple convenience, central cap, and at least one cap named here, by simple comfort, side cap, provided, for fixing to the electrical appliance box, of at least one chimney; has yet by object any electrical device whose box is equipped with such a cable clamping device for the maintenance of the electrical cable to be attached.

Briefly, the cable clamp device according to the invention comprises, in itself, although advantageously in the form of a single piece, a cap for each of the possible orientations for the electric cable is Mandatory disassembly for placement of this cable instead electric, and there is only one way to replace it later instead, which, for the benefit of security, allows guarantee with all certainty that, whatever the orientation maintained by the electric cable, it will be installed in practice effectively.

On the other hand, the very fact that caps thus presented participate in the constitution of a single piece, the number of fixing points to be provided for the whole it is advantageously minimized.

In practice, the number of these points of fixation can, advantageously, be reduced to two, to the benefit of both of the price of the set as of security.

Finally, whatever the orientation that keep the electric cable, the curvature that will be imposed on it so it will only advantageously involve its own drivers, and not its sheath.

It can thus be advantageously reduced corresponding radius of curvature, for the benefit of a reduction of the bulkiness or space occupied in plant by the set.

Preferably, to reduce, accordingly, the space occupied in height by the set, is planned, of according to the invention, which, while guaranteeing the tightening that the unique piece that forms, according to the invention, the whole of the caps comes into contact with the wall of the box on which it is placed, when the electric cable that has to be enclosed is an electrical cable of minimum diameter.

Preferably, finally, to minimize also the bulk due to the clamping device of cable inside the electrical appliance box, it is planned, according to a development of the invention, which, when the cable tightening device comprises a central cap and two side caps, side caps diverge one with respect to the other from the central cap, in order to that, in the event of the presence of a fixing terminal for the electric cable, this fixing terminal can find more Easily place between its lateral branches if desired.

Briefly, the provision according to the invention advantageously allows the realization of a device cable tightening particularly interesting from the point of economic view, as well as from the point of view of the security, minimization of occupied space and simplicity of use

The characteristics and advantages of the invention will also be revealed from the description that continue, provided by way of example and with reference to accompanying schematic drawings, in which:

Figure 1 is a perspective view of a electrical appliance equipped with a cable clamping device according to the invention;

Figure 2 is a partial view and in fragmented perspective, on a larger scale, of this apparatus electric, with the cable clamp device comprising tight on the electrical cable to which it is connected;

Figure 3 is a perspective view, to the same scale as that of Figure 2, of this clamping device of cable and of the part of the electrical device box on which has been provided;

Figure 4 is a perspective view, to different scale, of this cable clamp device, represented in isolation and seen from above;

Figure 5 is another perspective view of the same, seen from below;

Figures 6 and 7 are sectional views transversal of the same, following, each one of them respectively, lines VI-VI and VII-VII of the Figure 4;

Figure 8 is a plan view of this cable tightening device following arrow VIII of the Figure 2, installed in its place in the electrical appliance box considered, for a first orientation of the electric cable to which squeeze

Figure 9 is a cross-sectional view, to different scale, from the set, following the line IX-IX of Figure 8;

Figure 10 is a plan view, analogous to that of Figure 8, for another orientation of the electric cable
co;

Figure 11 is a cross-sectional view of the set, to the scale of Figure 9 and following the line XI-XI of Figure 10, for this other orientation of the electric cable;

Figures 12 and 13 are partial views in cutting of the set following, each of them respectively, lines XII-XII and XIII-XIII of the Figure 11;

Figure 14 is a cross-sectional view, analogous to that of Figure 11, for another electrical cable; Y

Figure 15 is a partial perspective view of a variant embodiment of the electrical appliance box of according to the invention.

These figures illustrate, by way of example, the application of the invention to the case in which the electrical apparatus 10 of This is a multi-socket socket or socket.

This electrical apparatus 10 comprises, therefore both, on the front of a housing or box 11 and, more precisely, on the upper face 12 of this box 11, a plurality of wells or cavities 13, at the bottom of each of the which intervenes a socket or base 14 of electrical outlet.

In the embodiment shown, the box 11 is, as a whole, parallelepipedic and is formed by a part, by a socket 15, which forms its bottom wall by itself 16 and that incorporates the essentials of the necessary mechanisms, and, by another part, by a cover or cover 18, which constitutes its face upper 12 together with the receptacles 13, and that is installed duly, removably, on socket 15.

In the embodiment that has been represented, the cover 18 extends over the entire height of the box 11 and, as a consequence, the socket 15 is reduced, as far as essential, to the back wall 16.

The cover 18 therefore includes, in addition to upper face 12, two longitudinal faces 19 and, alternately with these, two transverse faces 20.

In the embodiment shown, the deck 18 fits over socket 15 and, to bring this to out, it has, on its periphery or contour, a flange 22.

The joint, removable, joint cover 18 on the socket 15 can be done, for example, by adjustment by elastic jump and / or threading.

The corresponding provisions that are not relevant to the present invention will not be described here.

In practice, the electrical device that is thus consider it is mobile, although it can be used in the same way a fixed position or installation.

To service the various sockets 14 of electrical outlet comprising, an electric cable is provided 23 which, in the embodiment shown, consists of a flexible electrical cable comprising or enclosing, within a sheath of insulating material 24, the various electrical conductors 25 needed.

Its box 11 is therefore equipped with a cable tightening device 26, suitable for securing this electric cable 23.

In the embodiment shown, this cable tightening device 26 intervenes within the same box 11.

For example, and as represented, this it has been provided on the bottom wall 16 thereof.

But of course, others can be considered dispositions

In a manner known per se, the device Cable tightening 26 comprises at least one cap 28A, 28B suitable for the tightening of the electric cable 23, so that this tightening is done, in practice, in cooperation with the wall background 16 on which it is arranged.

In order to impose on the electric cable 23, as desired, one or the other of at least two different orientations,  the cable clamping device 26 comprises, in one piece, according to the invention, at least two caps 28A, 28B whose Longitudinal extension directions are different from each other, to know: a 28A cap, named here, for simple convenience, central cap, and at least one 28B cap, named here, for simple convenience, side hat, with at least one chimney 30 for fixing to the box 11 of the electrical apparatus 10.

By extension or extension address longitudinal for a cap 28A, 28B means here the general direction according to which such a cap 28A extends, 28B.

In the embodiment shown, the cable clamping device 26 comprises, according to a general U-configuration, three caps 28A, 28B, namely: the central cap 28A and two side caps 28B, and, taken individually, these various caps 28A, 28B are all, noticeably rectilinear.

In practice, extension addresses Longitudinal of these caps 28A, 28B are globally orthogonal to the orientations chosen as possible for the electric cable 23.

However, in the embodiment represented, each of the side caps 28B forms with the center cap 28A at an angle A slightly greater than 90º, at deviate outward as you move away from this central cap 28A.

The two side caps 28B diverge, by therefore, one with respect to the other counting from the central cap 28A.

In the embodiment that has been represented, angle A is the same for both of these two side caps 28B.

In any case, the two side caps they are, in practice, substantially coplanar.

The cable clamping device 26 according to the invention therefore has, in the embodiment shown, a plane of symmetry M which, being perpendicular to its central cap 28A,
passes through the middle of it.

This plane of symmetry M has been represented schematically in dashed lines for tracing in Figure 8.

Tilt abstraction set out below, the lower face 31B of the side caps 28B is noticeably at the same level than the bottom face 31A of the center cap 28A.

But yes, in the embodiment that has been represented, the center cap 28A has a height noticeably constant throughout its length, it does not happen same with the side caps 28B, whose height, by the on the contrary, it decreases progressively from the central cap 28A.

For the center cap 28A, the upper face 32A is therefore substantially parallel to the lower face 31A.

On the contrary, for the side caps 28B, the upper face 32B progressively approaches the face bottom 31B as it moves away from the center cap 28A.

In addition to its lower faces 31A, 31B and higher 32A, 32B, caps 28A, 28B comprise, respectively, side faces 33A, 33B which, in the embodiment, are substantially parallel to each other, if some are abstracted eventual remains of molding.

In the embodiment shown, the cable clamping device 26 according to the invention It comprises two chimneys 30.

One of these chimneys 30 intervenes substantially at the junction of the central cap 28A with one of the side caps 28B, half width of these caps 28A, 28B, that is, half the distance between their faces lateral 33A, 33B, and, in the same way, the other of these chimneys 30 is located substantially at the junction of the hat center 28A with the other side caps 28B, half width of these caps 28A, 28B, that is, at medium distance between its lateral faces 33A, 33B.

In practice, chimneys 30 extend substantially perpendicular to the plane of the caps 28A, 28B.

At its mouth of entrance 35, which is located on the side of the upper face 32A, 32B of the caps 28A, 28B, chimneys 30 present, slightly delayed or in incoming with respect to this inlet mouth 35, a neck 36 of the lower section of the passage section than these present in its main part, for the support of head 37 of a screw 38.

At least one of the caps 28A, 28B of the cable clamping device 26 according to the invention, and, preferably, as depicted, each of these caps 28A, 28B, has at least one recess 40A, 40B forming a hollow, in its lower face 31A, 31B.

In practice, in the embodiment that it has been represented, it is planned, in this way, only one recess in caps 28A, 28B.

The recesses 40B are noticeably aligned with each other from the side caps 28B.

For example, and as represented, the recesses 40A, 40B have a circle arc profile.

These extend significantly in the area average of the caps 28A, 28B, halfway between ends of these.

In the embodiment shown, at minus one of the caps 28A, 28B of the clamping device 26 cable according to the invention, and preferably as each of these caps 28A, 28B has been represented, comprises, forming a hollow in its lower face 31A, 31B, on all for reasons of molding, a drain 42A, 42B, from what results that this forms, substantially in parallel with its direction of longitudinal extension, and substantially parallel to each other, two walls 43A, 43B.

The notch 40A, 40B affects, of course, of different way to one and another of these walls 43A, 43B, and the outer surface of these forms the lateral faces 33A, 33B corresponding.

In the embodiment that has been represented, at least one of the caps 28A, 28B of the cable clamping device 26 according to the invention and, preferably, as depicted, each of these caps 28A, 28B, comprising, forming a hole in your face bottom 31A, 31B, an incision 44A, 44B that extends, substantially in parallel with its extension address longitudinal, at least a part of its length, substantially at half distance between its walls 43A, 43B.

For center cap 28A, incision 44A it only extends in a part of the length and, for side caps 28B, on the contrary, extends in the all of it.

More precisely, incision 44A that presents the central cap 28A only extends in the middle part of its length, between the two chimneys 30, some distance from these, and, on the contrary, the incision B presented by the side caps 28B extends throughout its entire length, crossing chimney 30 from part to part correspondent.

For center cap 28A, incision 44A extends closer to the innermost wall 43A.

For side caps 28B, the incision 44B extends substantially midway between the walls 43B.

As indicated above, the cable clamping device 26 according to the invention is provided on bottom wall 16 of box 11.

This one is attached to it with the help of two screws 38, at the rate of one for each chimney 30.

In practice, and as represented, the plane of symmetry M of the cable clamping device 26 is then extend parallel to the direction of extension longitudinal of the box 11.

More precisely, the center cap 28A of the cable tightening device 26 is then noticeably parallel to one of the transverse faces 20 of the cover 18 of this box 11, near it, and therefore corresponds to an exit axial for the electric cable 23.

As a result, the caps laterals 28B then extend slightly obliquely with with respect to the longitudinal faces 19 of the cover 18 of the box 11, in the vicinity of these, and each of them corresponds, respectively, to a side outlet for the electric cable 2. 3.

Opercles 47A, 47B are planned in correspondence, on the transverse face 20 involved of the cover 18 and on its longitudinal faces 19.

These are, for example, susceptible operculums of going down or to be trimmed.

In Figures 1 and 2, the operculum 47A of the face Transverse 20 has been supposedly eliminated.

For each of the chimneys 30 of the cable tightening device 26, the box 11 presents, on the other part, protruding from its bottom wall 16, that is, protruding from the socket 15 that constitutes this bottom wall 16, a stud or stud 48 on which the device 26 of cable tightening by means of one of such chimneys 30.

This stud 48, which is hollow, serves as housing a drilled insert 49 with which the stem 50 of the screw 38 is imprisoned by threading correspondent.

For each of the caps 28A, 28B of the cable tightening device 26, the box 11 also presents protruding from its bottom wall 16, a rib 51A, 51B that is extends parallel to the walls 43A, 43B of one of said caps 28A, 28B, between these walls 43A, 43B.

Along its free edge, this rib 51A, 51B presents a recess 52A, 52B which, in the manner of recess 40A, 40B of the caps 28A, 28B of the device 26 cable clamp, has a circle arc contour, but that follows a concavity that is turned in the opposite direction to this one last.

The rib 51A corresponding to the cap center 28A of the cable clamping device 26 extends from one to another of two slats 53 that are parallel to each other and perpendicular to this rib 51A, and which are arranged, each one of them, respectively, some distance from the two lugs 48, among these.

The two ribs 51B corresponding to the two side caps 28B extend opposite one with with respect to the other, from the two studs 48.

Preferably, and this is the case in the form of preferred embodiment, between the clamping device 26 of cable and the bottom wall 16 of the box 11 involved means of tilting 54.

In the embodiment represented, these tilting means 54 comprise, on the lower face 31A of the central cap 28A of the cable clamping device 26, a tilting projection 55 shaped dihedral, whose edge is extends parallel to the longitudinal extension direction of this central cap 28A, of both parts of each of chimneys 30, and by virtue of which the clamping device 26 cable is likely to be supported on the bottom wall 16 of box 11, and, at the same time, there is a game J between each of these chimneys 30 of the cable clamping device 26 and the pin corresponding 48 of box 11, at least transversely with with respect to the corresponding tilting axis, that is, at less following a direction perpendicular to the central cap 28A, as shown in Figure 8 for one of these chimneys 30 and for one of these studs 48.

Finally, in the embodiment represented, box 11 presents, protruding from its wall of bottom 16 and, therefore, protruding from the socket or base 15 that constitutes this bottom wall 16, a connection terminal 56 to which are connected, respectively, each of the conductors electrical 25 of the electric cable 23.

In the embodiment shown, this connection terminal 56 extends a certain distance from the cable tightening device 26.

But, due to the divergence between side caps 28B, this may be, if desired, more or less coupled between the latter.

For the connection of the electric cable 23, it is it is necessary to disassemble the clamping device 26 from cable.

It is necessary, in effect, that the electric cable 23 fits under one or the other of the caps 28A, 28B of this cable tightening device 26.

After connection of the electric cable 23, the cable tightening device 26 is placed back in its place.

In Figures 1 to 9, it has been assumed that the power cord 23 has been attached under the center cap 28A of cable clamping device 26.

The orientation imposed on the electric cable 23 It then corresponds to an axial outlet for it.

As will be appreciated, walls 43A of the central cap 28A of the cable tightening device 26, by one part, and the corresponding rib 51A of the box 11, by on the other hand, they then impose a path on the electric cable 23 in zigzag, for the benefit of its retention.

In Figures 10 to 14 it has been assumed, as variant, that the electric cable 23 has been coupled under one or another of the side caps 28B of the clamping device 26 of cable.

The orientation imposed in this way to the cable electric 23 then corresponds to a side outlet for East.

As before, and as can be seen in the Figure 13, the walls 43B of the side cap 28B involved, on the one hand, and the corresponding rib 51B of the box 11, by on the other hand, they impose a path or zigzag tour.

Preferably, for such lateral exit of the electric cable 23, the tightening of screws 38 is continued until that the cable clamping device 26 rests on the wall of bottom 16 of box 11 by its tilting boss 55.

Accordingly, by construction, this tilting projection 55 is separated from the axes of the studs 48 and, therefore, separated from the plane according to which they exercise their effect screws 38.

Next, the tightening device 26 of cable tilts roughly in the direction of recess 52B of the ribs 51B if, as shown in Figure 14, the electric cable 23 has a sufficiently small diameter so that it comes into contact with the bottom wall 16 of the box 11 before coming into contact with it.

Of course, the tilting of the device 26 cable tightening is done in the opposite direction to the previous one in if, on the contrary, and as represented in the Figure 11, the electric cable 23 has a diameter of important enough to come into contact with it before coming into contact with the bottom wall 16 of the box eleven.

But, in any case, the electric cable 26 is find tight tight.

In both cases, the tilting of the cable tightening device 26 looks authorized by incisions 44B of side caps 28B, such that these are coupled by these incisions 44B on the ribs 51B of the box 11.

It is to be emphasized, on the other hand, that, if desired, the cable clamp device 26 according to the invention allows, advantageously, to tighten simultaneously, at at least two different directions, at least two electrical wires different, namely: an electric power cable and at least one grounding electrical cable.

In the embodiment variant shown in Figure 15, the bottom wall 16 of the box 11 presents, protruding from the base of the lugs 48, a rib 58 that is extends from either side of its 48 lugs and that goes in particular, up to the gaps 53 that flank the rib 51A by its ends.

This rib 58 is intended to serve as support to the tilting boss 55 of the clamping device 26 cable, whose tilting plane is thus slightly enhanced or elevated, without the mode of implementation of this cable tightening device 26 is modified by it.

The expression must therefore be understood "bottom wall 16" in a broader sense, in particular when it has been indicated that the tilting boss 55 of the cable clamping device 26 rests on this wall of fund 26, which must then be interpreted so that eventually understand, for this purpose, rib 58.

In addition, in this variant embodiment they have provided other ribs protruding from the bottom wall 16 of the box 11, in order to impart rigidity to this bottom wall 26.

Of course, the present invention is not limited. to the embodiments that have been described and represented, but which encompasses all execution variants.

In particular, instead of understanding a tilting projection on the cable clamping device, the tilting means involved between this cable and the box could also, in the same way, comprise a projection of tilt over this box.

Claims (25)

1. A cable tightening device that is intended to equip the housing or box of any electrical appliance and which is of the genre comprising a cap suitable for tightening the electrical cable to be connected in this electrical appliance, characterized in that , in order to impose on the electric cable (23) in question, as desired, one or the other of at least two different orientations, this comprises, in one piece, at least two caps (28A, 28B) whose directions elongation or longitudinal extension are different from each other, namely: a cap (28A) called here central cap and at least one cap (28B) called here side cap, with at least one chimney (30) for attachment to the box ( 11) of the electrical apparatus (10). 2. A cable clamping device according to claim 1, characterized in that the chimney (30) extends substantially perpendicular to the plane of the caps (28A, 28B). 3. A cable clamping device according to any one of claims 1 and 2, characterized in that, at its inlet opening (35), the chimney (30) has a neck (36) of a lower section of the passage step section that presents in its main part. 4. A cable tightening device according to any one of claims 1 to 3, characterized in that the chimney (30) substantially intervenes in the union of the central cap (28A) with the side cap (28B). A cable tightening device according to any one of claims 1 to 4, characterized in that the side cap (28B) forms a certain angle (A) with the center cap (28A). A cable tightening device according to claim 5, characterized in that the side cap (28B) forms an angle slightly greater than 90 ° with the center cap (28A). 7. A cable clamping device according to one of claims 1 to 6, characterized in that at least one of the caps (28A, 28B) has at least one recess (40A, 40B) in its lower face (31A, 31B ). A cable tightening device according to claim 7, characterized in that each of the caps (28A, 28B) has at least one recess (40A, 40B) in its lower face (31A, 31B). 9. A cable clamping device according to any one of claims 1 to 8, characterized in that at least one of the caps (28A, 28B) comprises, forming a recess in its lower face (31A, 31B), a recess (42A, 42B), so that it forms, consequently, substantially parallel with its longitudinal extension direction and substantially parallel with one another, two walls (43A, 43B). 10. A cable clamping device according to claim 9, characterized in that each of the caps (28A, 28B) comprises, forming a recess in its lower face (31A, 31B), a recess (42A, 42B). 11. A cable clamping device according to any one of claims 1 to 10, characterized in that at least one of the caps (28A, 28B) comprises, forming a recess in its lower face (31A, 31B), an incision (44A, 44B) which extends, substantially in parallel with its direction of elongation or longitudinal extension, by at least a part of its length. 12. A cable clamping device according to claim 11, characterized in that each of the caps (28A, 28B) comprises, forming a recess in its lower face (31A, 31B), an incision (44A, 44B). 13. A cable clamping device according to claim 12, characterized in that, for the central cap (28A), the incision (44A) only extends over a part of the length, and, for the side cap (44B ) extends throughout it. 14. A cable clamping device according to any one of claims 1 to 13, characterized in that it comprises, following a general U-configuration, three caps (28A, 28B), namely: a central cap (28A) and two side caps (28B). 15. A cable clamping device according to claims 6 and 14, taken together, characterized in that the side caps (28B) diverge with respect to each other from the central cap (28A). 16. A cable clamping device according to claims 4 and 14, taken together, characterized in that it comprises two chimneys (30), one at the junction of the central cap (28A) with one of the side caps (28B), and the other at the junction of this central cap (28A) with the other of the side caps (28B). 17. A cable clamping device according to claims 13, 14 and 16, taken together, characterized in that the incision (44A) having the central cap (28A) only extends in a middle part of its length, between the two chimneys (30), at a certain distance from them, and the incision (44B) presented by the side caps (28B) extends over its entire length, crossing the corresponding chimney (30). 18. A cable tightening device according to any one of claims 14 to 17, characterized in that it has a plane of symmetry (M) that is perpendicular to its central cap (28A) and passes through the middle area of the latter. 19. An electrical apparatus of the genre to which an electrical cable is connected and which is provided, by equipping its housing or box, for the fastening of this electrical cable, with a cable clamp device, characterized in that this cable clamp device ( 26) is in accordance with any one of claims 1 to 18. 20. An electrical apparatus according to claim 19, characterized in that its housing (11) has a bottom wall (16) and the cable clamping device (26) is provided on this bottom wall (16). 21. An electrical apparatus according to claim 20, characterized in that, for each of the chimneys (30) of the cable clamping device (26), the box (11) has, protruding from its bottom wall (16) , a block or stud (48), on which the cable clamping device (26) is coupled by means of one of said chimneys (30). 22. An electrical apparatus according to any one of claims 19 to 21, characterized in that, for each of the caps (28A, 28B) of the cable tightening device (26), the box (11) has, protruding from its bottom wall (16), a rib (51A, 51B) that extends parallel to the walls (43A, 43B) of one of said caps (28A, 28B), between these walls (43A, 43B). 23. An electrical apparatus according to claim 22, characterized in that each rib (51A, 51B) comprising the housing (11) has a recess (52A, 52B) along its free edge. 24. An electrical apparatus according to any one of claims 20 to 23, characterized in that, between the cable clamp device (26) and the bottom wall (16) of the housing (11), tilting means (54) are involved. ). 25. An electrical apparatus according to claim 24, characterized in that the tilting means (54) comprise, on the lower face (31A) of the central cap (28A) of the cable clamp device (26), a tilting projection (55) by means of which the cable clamping device (26) is able to rest on the bottom wall (16) of the box (11), and, together, there is a play (J) between each of the chimneys (30) of the cable clamping device (26) and the corresponding pin (48) of the box (11), at least transversely with respect to the corresponding tilting axis.