FR2608847A1 - CONNECTING CONNECTOR FOR ELECTRICAL APPARATUS INSTALLED BY CLAMPING ON A MOUNTING RAIL, AND ELECTRIC APPARATUS CLEAR FOR THE IMPLEMENTATION OF SUCH A CONNECTING CONNECTOR - Google Patents

Abstract

THIS IS TO ENSURE ONE OR MORE ELECTRICAL LINKS BETWEEN TWO ELECTRICAL APPLIANCES 10A, 10B JOINTLY CONNECTED TO A MOUNTING RAIL 11. ACCORDING TO THE INVENTION, A LINK CONNECTOR 15 IS IMPLEMENTED FOR THIS EFFECT. IS ENGAGED FOR PART UNDER BOX 12 OF ONE AND THE OTHER OF THE ELECTRICAL APPLIANCES 10A, 10B, AND WHICH SUPPORTS ONE OR MORE CONNECTION BODIES 20 SPECIFIC TO THE ELECTRICAL LINKS TO BE ESTABLISHED. APPLICATION TO ELECTRICAL DEVICES TO BE MOUNTED BY SNAPPING ON A MOUNTING RAIL, AND, FOR EXAMPLE, TO ELECTRICAL SURVEILLANCE DEVICES.

Description

Connecting connector for electrical appliance to be installed by

  The present invention generally relates to electrical devices adapted to be fitted by snapping onto any mounting rail, such as to be fitted to a mounting rail, and to electrical apparatus suitable for implementing such a connection connector. this is the case, for example, in cabinets, called electrical cabinets, in which can be grouped

  a number of such devices.

  Such electrical devices are commonly called * modular *, in that o, all the same transverse profile, they each have a length that is a multiple

  of the same common basic module & set.

  Arranged one after the other on the same mounting rail, it may be necessary to establish one to

the other of the electrical connections.

  This is the case, for example, for electrical equipment intended for the equipment of an installation in which there is to monitor the state of opening or closing of various contacts scattered at various points,

  and, if necessary, to trigger an alarm accordingly.

  At least two separate electrical appliances are in effect to be used, one for the sole purpose of supplying the household with the other. a certain number of monitoring loops, and, secondly, the management of these, it being understood that, depending on the power of which the first is capable, it is possible for --- to be joined to this second apparatus a third, which, constituting only a simple extension of the preceding one, is only proper to the service of a certain

  number of additional monitoring loops.

  To date, when electrical connections are to be established between electrical devices thus staggered along a same mounting rail, these electrical connections are usually made using bridges each made by a wire.

  Such an arrangement has various disadvantages.

  First, in the electrical connection & establish between a component of one device and a component of the other,

  it leads to a multiplication of points of contact.

  Indeed, even if such components are usually directly reported on a map, that is to say on a support plate also carrying a clean printed circuit & their service, which implies for each of these constituents a first point of contact, it is necessary, for the connection of the wire providing the electrical connection concerned, to implement, on the same card, a connection terminal, for example a screw connection terminal, specific to the connection of this wire, which implies, in addition, a second point of contact between such a connection terminal and the card concerned.and a third point of contact between the wire and this connection terminal, that is, for the entire electrical connection

  thus achieved, a total of six points of contact.

  this inevitably results in a relatively high passage resistance which can lead to a harmful voltage drop, especially when, as is the case in electronics, the corresponding currents are

low voltage.

  In addition, the electrical connections thus made are difficult to perform, long and costly, especially when the accessibility to the electrical appliances concerned is measured, as is the case for example when these electrical appliances are installed at the bottom of an electrical cabinet , and their good execution depends on

  the operator who ensures the realization.

  Finally, in spite of the identification usually provided to obviate this difficulty, errors of connection are always possible, in particular when, for a repair, it

  you have to unplug a device to replace it with another one.

  The present invention generally has the

  object a provision to avoid these disadvantages.

  More specifically, it firstly relates to a connection connector for electrical apparatus snap-fitting on a mounting rail, this connection connector being generally characterized in that it comprises a base of insulating material, which is clean & housed under the housings of two successive electrical devices, between such housings and the underlying mounting rail, being engaged partly in a recess provided for this purpose in the housing of one of said electrical devices and partly in a recess also provided for this purpose in the casing of the other of these, and, carried by said base, at least one metal connection member, which, & each of the transverse ends of this base , has a contact piece specific to an electrical connection with a contact track provided for this purpose in the recess of the casing of the corresponding electrical apparatus; it also relates to an electrical device snap-fitting on a mounting rail specific to the implementation

  of such a connection connector.

  In practice, the connection connector according to the invention comprises, parallel to each other, several connecting members, which are all identical to each other, and whose contact parts are elastically deformable substantially perpendicular to the base which carries them, for their application under elastic pressure with the corresponding contact tracks of the device

concerned.

  For example, in a preferred embodiment, these connecting members are in the form of simple metal pins round wire

suitably conformed.

  Anyway, for the implementation of such a connection connector, an electrical device according to the invention comprises, jointly, at least one of the transverse ends of its boot, at the base of which ci, a recess, in which can engage such a connector, and in which opens at least one contact track, and, in practice, a plurality of such contact tracks, & reason for one per connection member

  carried by said link connector.

  For example, when such an electrical apparatus comprises, for the support and / or the service of one or more components, a printed circuit board, or card ', these contact tracks can very simply be carried by this printed circuit board. , and it is this one that leads directly into the recess

corresponding of its case.

  Anyway, for the electrical connections & establish between two electrical devices & establishment by snapping on a mounting rail, it is sufficient, thanks to the connection connector according to the invention, to snap one of these electrical apparatus on this mounting rail, to slide such a connection connector under the housing of this electrical device, and then to latch on the mounting rail the second electrical device concerned, either directly on the connection connector , or at a distance from the latter, its snapping on the mounting rail then being followed by a sliding along the latter until engagement of its housing on said

link connector.

  The assembly, thus simplified, is very easy and fast, and it does not require any particular skill or any

specific tool.

  It can be applied both to the initial installation of the electrical appliances concerned and any subsequent intervention on these, such as those necessary for example for their maintenance or replacement. In all cases, complementary shaped provisions, keyed to be provided for this purpose between the connector and the electrical devices likely to be concerned, there is no risk of poor connection between these electrical devices.

260,884?

  In addition, the number of contact points involved in the electrical connection established between a constituent of one of the two electrical appliances concerned and a constituent of the other of these is advantageously reduced to four, no connection terminal, to screw or other, not involved in such an electrical connection, which advantageously reduces the passage resistance of the assembly. Finally, covered by the boltier even electrical appliances concerned, the electrical connections thus provided between these electrical devices are advantageously inaccessible in normal operation, which, in particular, puts them advantageously & protected from inadvertent accidental intervention, and, therefore, constitutes a

guaranteed for their durability.

  The characteristics and advantages of the invention

  will emerge from the description which follows,

  By way of example, with reference to the appended diagrammatic drawings, in which: FIG. 1 is a perspective view, shown in place on a mounting rail, of two electrical appliances fitted to the implementation of a connection connector according to FIG. 'invention; Figure 2 is a lower scale and with a local cutaway, an elevational view of these electrical devices, along the arrow II of Figure 1; FIG. 3 is the scale of FIG. 1, a perspective view, seen from a first side, of the connection connector used between these electrical appliances; Figure 4 is a perspective view, on the opposite side to the previous one, of this connection connector; Figure 4a shows, on a larger scale, Figure 4; Figure 5 is a larger scale, a plan view, along the arrow V of Figure 3; Figure 6 is a cross-sectional view along the line VI-VI of Figure S; Figure 7 is a longitudinal sectional view along the broken line VII-VII of Figure 5; Figure 8 is a perspective view of one of the connecting members that comprises such a connecting connector; Figure 9 is a partial side elevational view along the line IX-IX of Figure 2, one of the two electrical devices shown in Figure 2; Figures 10 and 11 are, in the manner of Figure 9, partial side elevational views respectively along the lines X-X and XI-XI of Figure 2, the other of the two electrical appliances concerned; Figure 12 is, along the arrow XII of Figure 9, a partial view from below of the electrical apparatus shown in Figure 9; FIGS. 13A, 13B are plan views which illustrate two successive phases of the own assembly process and the implementation of a connection connector

according to the invention.

  As can be seen in these figures, and more particularly in FIGS. 1 and 2, it is a matter of providing one or more electrical connections between two electrical appliances 10, in this case electrical appliances 10A and 10B. , of the type & snap fit on a mounting rail 11, it being understood that, as will appear later, a higher number

  such electrical apparatus 10 may be concerned.

  These electrical devices 10 being known by themselves, and not falling under the present invention, they

  will not be described in all their details here.

  Only the necessary elements will be described

understanding of the invention.

  To do this, it will be sufficient to indicate that they each comprise a box 12 of the same type and cover the mounting rail 11 by detachably gripping the one or more components to be connected.

  electrically & one or more constituents of the other.

  In practice, the casing 12 has the same transverse contour for the one and the other of the electrical appliances concerned, and its length, possibly different from - one to the other of these, is a multiple of one module of

base common to all.

  The embodiment shown illustrates more particularly, by way of example, the case where, as is usual, each of the electrical apparatus 10 concerned comprises, in its casing 12, for the support and / or the service of its constituents, a 'card' 13, that is to say

a printed circuit board.

  The mounting rail 11 is not concerned either

by the present invention.

  In the embodiment shown, it is a symmetrical rail, that is to say a rail whose wings, of the same height, are each provided with a square back along their edge , in opposite directions, one by

report to the other.

  But it could as well be an asymmetrical rail, that is to say a rail whose wings, different heights, have their return in square led

towards each other.

  According to the invention, for the electrical connections to be established between the electrical devices 10 concerned, in this case between the electrical devices 10A and 10B, which are of different types, a connection connector 15 is used which includes on the one hand, a base of insulating material 16, which is adapted to be housed, in the manner of a drawer, under the housings 12 of these two electrical devices O10A, lOB successive between such housings 12 and the mounting rail 11 underlying, being engaged in part in a recess 17A provided for this purpose in the housing 12 of the electrical apparatus 1OA and partly in a recess 17B also provided for this purpose in the housing 12 of the electrical apparatus 1B, and, on the other hand, carried by said base 16, at least one metal connection member, which, at each of the transverse ends of this base 16, has a contact piece 21, own and an electrical connection with a track of co ntact 22 provided for this purpose in the recess 17A, 17B of the housing 12 of the corresponding electrical apparatus 10A, 10B. In practice, the connection connector 15 comprises, parallel to one another, several

identical connection.

  For example, in the embodiment shown in FIGS. 3, 4, there are thus three

connection 20.

  Each of them consists of a round wire pin, Figure 8, and it comprises, in one piece, a middle portion 23, by which, as described later, it is subject to the base 16 which carries set, and each arranged respectively at the ends of this middle part 23, two wings which form the pieces of

contact 21.

  For example, and as shown, these wings each form an acute angle V, of the order of 30, with the part

median 23 that they frame.

  In the embodiment shown, these wings, which are each connected by a broad rounded fillet at the middle part 23, each extend, at their free end, beyond a substantially rounded fillet, by

  a return parallel to themselves.

  In any event, each of the contact pieces 21 thus has a connection member 20 is elastically deformable substantially perpendicular to

the base 16 carrying the assembly.

  The connection members 20 thus comprising the connecting connector 15 according to the invention are each individually housed in recesses 25 of its base 16, which, elongated in the form of a slot, parallel to each other, at a distance from one another , all open on the surface of this base 16, and only the contact pieces 21 that form, as previously described, at their ends, these connecting members 20, emerge from these

recesses 25.

  In the embodiment shown, the base 16, of generally parallelepipedal contour, without regard to a usual draft angle, comprises a plate 26, in which are formed the preceding recesses, and at the periphery of this plate 26, for support on the rail

mounting 11, a skirt 27.

  In practice, in this embodiment, on two of the opposite sides of the plate 26, which, with respect to the elongation direction of the mounting rail 11, form the transverse sides of this plate 26, the skirt 27 is largely indented. The recesses 25 extend parallel to the other two sides of the plate 26, and therefore, parallel to the

longitudinal sides of it.

  In the embodiment shown, they are at

number of hui.t.

  At each of at least some of these recesses 25,

  it is associated on the base 16, a marker 29.

  it is, in the embodiment shown, globally hemispherical bosses projecting on a facet 30 of the plate 26, which, arranged along one of the transverse sides of this plate 26, is slightly

  shrinkage relative to its upper surface.

  In practice, in the embodiment shown, there is thus associated a reference mark 29 to three of the recesses 25, those actually concerned by the three connecting members 20 implemented in this form of

production.

  In any event, each of the recesses 25 in the base 16 has, transversely and symmetrically, on either side of its elongation direction, three openings, namely an expansion 32 in its median zone, and two shoes 33 arranged, each respectively, at its ends. The punches to be used for the formation of these recesses 25 during the molding of the assembly are

thus advantageously reinforced.

  In the embodiment shown, each of the connection members 20 is engaged by its middle portion 23, under a hook 35 present for this purpose at the bottom of the recess 25 in which it is housed, in favor

  corresponding blooming 32 of this recess 25.

  From one recess 25 to the other, the hooks 35 are arranged back to back, and they each have an oblique engagement face 36, directed inwardly of the corresponding recess 25, and a retaining facet 37, which, parallel to the bottom of this recess 35, extends at a distance thereof substantially equal to the diameter of the wire

  round of which are constituted the connecting members 20.

  In practice, for each recess 25, the hook 35 extends transversely beyond the center line of a

such recess 25.

  As it is easy to understand, the expansion 32 to the advantage of which such a hook 35 also facilitates the establishment of a connection member 20 in such a recess 25, this implementation. place involving a temporary elastic deformation of the middle portion 23 of such a connecting member 20, until its

  local engagement under this hook 35.

  For the rest, that is to say in their current part, between their openings 32, 33, the recesses have a width barely greater than the diameter of the round wire of which the connecting members 20 are constituted, for

a good maintenance of these.

  In the embodiment shown, the base 16 of the connecting connector 15 according to the invention has, laterally projecting, along at least one of its

  longitudinal sides, a tongue 39.

  In practice, in this embodiment, such a tongue 39 is provided only along one of the

  longitudinal sides of the base 16, at the base thereof.

  Furthermore, in this embodiment, this tongue 39 comprises two successive sections 39A, 39B of different heights HA, HB, forming, in its zone

median, a march 40.

  In practice, these sections 39A, 39B extend substantially each length relative to the base 16, and that 39A, which is disposed on the side of the electrical apparatus 10A, has a mean height HA lower than the average height. HB of that, 39B, located on the side of

the electric appliance lOB.

  Finally, for its guidance along the mounting rail 11, the base 16 of the connecting connector 15 according to the invention has, projecting on its lower surface, in the embodiment shown, along one to the

  less than its longitudinal sides, at least one lug 42.

  In practice, in this embodiment, two lugs 42 are thus provided, at a distance from one another, along only one of the longitudinal sides of the base 16, that

  along which is already present the tongue 39.

  As a corollary, the recess 17A that the casing 12 of the electrical apparatus 10A for the engagement of the connection connector 15 according to the invention has a transverse contour of which at least a portion is in the profile of the base 16 of this connector link 15, and, in particular, this transverse contour has, laterally, in correspondence with the tongue 39 of this connection connector 15, a recess 41 whose height H'A, given the footprint of the box 12 on the mounting rail 11, corresponds to the height HA of the lower section 39A of this tongue 39, while being slightly greater than it. In practice, the housing of the electrical apparatus 10A thus has a recess 17A that at one of its transverse ends, that concerned by the connector

  link 15 at the base of this transverse end.

  By cons, and for reasons that will appear below, the housing 12 of the electrical apparatus 10B has a recess at one and the other of its transverse ends. Thus, besides the recess 17B that it has at its transverse end concerned by the connection connector 15, it has a recess 17'B & its end

  transverse transverse, Figures 1 and 11.

  As previously, the transverse contour of these recesses 17B, 17'B is at least partly to the profile of the base 16 of the connection connector 15, and in particular, it has, laterally, in correspondence with the tongue 39 of this connector link 15, a recess 42 ', 42 "whose height H'B corresponds, under the same conditions as above, to the height HB of the section of larger

height 39B of this tongue 39.

  Thus, depending on the electrical apparatus 10A or 10B concerned, the height H'A, H'B of the lateral recess 41, 42 ', 42 "of the recess 17A, 17B or 17'B of such an electrical appliance corresponds to one or the other of the heights HA, HB of the tongue 39 of the base 16 of the connector of

link 15.

  This tongue 30 is, therefore, in the embodiment shown, and as it will appear better

later, a foolproof.

  Be that as it may, the contact tracks 22 with which the electrical devices 10A, 10B are provided are in practice present on the lower surface of their circuit board or circuit board 13, which extends largely for this purpose in the recess 17A, 17B or 17'B

  corresponding, at the top of it.

  Preferably, and as shown, it is provided, transversely, in such a recess 17A, 17B or 17'B, a stop 44 adapted to limit the engagement of a connector

link 15.

  This is, in practice, an internal partition of the

box 12 concerned.

  For the implementation of the connection connector 15 according to the invention, it is firstly done, in the usual manner, to the establishment, by snapping, of the apparatus

  10A on the mounting rail 11, Figure 13A.

  The connecting member 15 is then in turn applied, by the edge of its skirt 27, against this mounting rail 11, with contact of its lugs 42 with the edge of the wing

corresponding to it.

  It then suffices to slide the connection connector 15 along the mounting rail 11, along the arrow F1 of FIG. 13A, until it half engages in the corresponding recess 17A of the housing 12 of

  the electrical apparatus 10A, FIG. 13B.

  Given the arrangements described above, this commitment can only be made in a definite orientation, for which the tongue 39 of the connection connector 15 is on the same side as the recess 41 of the recess 17A of the housing 12 of the appliance electrical 1OA, with its lower section 39A directed towards the latter. It suffices, finally, to put in turn in place on the mounting rail 11, by snapping, the device

Electric lOB.

  As shown diagrammatically by the arrow F2 in FIG. 13B, on which the electrical apparatus 10B is only shown schematically in broken lines by its outline, this installation can be done directly on the connection connector 15,

by pivoting around it.

  Alternatively, it may be remote from the connector 15, and then simply slide the electrical device 10 along the mounting rail 11 until it engages the part of the connector of connection 15 protruding from the housing 12 of

the electrical apparatus 10A.

  As it is easy to understand, this engagement of the electrical apparatus 10B on the connection connector 15 is made possible by the height, suitable for this purpose, of the lateral recess 42 'of the recess 17B corresponding

of its case 12.

  In all cases, the electrical devices 10A, 1B, once set up, are joined, one after the other, and their shoemakers 12 therefore cover

  completely the connection connector 15.

  As a corollary, their contact tracks 22 having been arranged accordingly, the electrical connections sought between these electrical devices 10A, 10B are then ensured by the connection members 20 that

  comprises the connection connector 15 according to the invention.

  Indeed, by construction, the projection D1 formed by the rest of the contact parts 21 of these connection members 20 on the plate 26 of the base 16 of the connecting connector 15 which carries them, Figure 6, is greater than the distance D2 separating this plate 26 from the printed circuit board or plate 13 of the electrical devices A, 10 B, when, FIG. 2, the connection connector 15 is

  inserted under the box 12 of these.

  Given the elasticity of these contact parts 21, they are then elastically applied to the contact tracks 22 concerned, their implantation having been

planned accordingly.

  It goes without saying, however, that the invention is not limited to the case where only two electrical devices 10A, 10B

are concerned.

  On the contrary, it can extend as well to a

  higher number of electrical appliances.

  For example, and as shown schematically in dashed lines in Figure 1, a third electrical apparatus C, forming a kind of extension of the apparatus

  electrical lOB, can be considered.

  This is the reason why the electrical apparatus lOB has a recess 17B, 17'B to one and the other of

its transverse ends.

  By its recess 17'B, it can in fact be implemented a second connector 15 according to the invention, clean & ensure between him and the device

  electrical 10C the necessary electrical connections.

  By the keying shapes to which the tongue 39 of such a connection connector 15 corresponds, it is impossible in practice for a direct connection to be established between, for example, an electrical apparatus 10A and an electrical apparatus 10OC. All electrical devices with front indications to read and therefore all be set up in the same orientation on the mounting rail

  11, there is no ambiguity on this subject.

  In practice, for the electrical connections to be established between the electrical apparatus 10B and the electrical apparatus 1 OC which forms an extension, a number of connection members

  more than three may be necessary.

  This is the reason why the base 16 of the connection connector 15 according to the invention comprises in

  waiting for a greater number of recesses 25.

  The present invention is not limited to the embodiments described and shown, but encompasses

any variant of execution.

  In particular, the connecting members that comprises the connector of the invention according to the invention, instead of consisting of pins in the manner of rubbers as more particularly described and shown, could consist for example of clips coming s' Socket on the end of the card or corresponding printed circuit board. Similarly, the implementation of such a printed circuit board or circuit board is not essential, and it could be substituted for specific contact tracks, to which the constituents concerned would be

  each individually appropriately connected.

Claims (21)

  1. Connection connector for electrical appliance snap fit on a mounting rail, characterized in that it comprises a base (16) of insulating material, which is clean & lodge under the housings (12) of two successive electrical apparatuses (10A, 10B) between such housings (12) and the underlying mounting rail (11), being engaged in part in a recess (17A) provided for this purpose in the casing (12) of the electrical apparatus (10A) and partly in a recess (17B) also provided for this purpose in the housing (12) of the electrical apparatus (10B) and, carried by said base (16), at least one connection member metal member (20) which, at each of the transverse ends of this base (16), has a contact piece (21) suitable for electrical connection with a contact track (22) provided for this purpose in the recess (17A). 17B) of the casing (12) of the corresponding electrical apparatus (1OA, 10B). 2. Connection connector according to claim 1, characterized in that each of the contact pieces (21) of said connecting member (20) is elastically deformable   substantially perpendicular to said base (16).   3. Link connector according to any one of   claims 1, 2, characterized in that said organ   connection (20) comprises, in one piece, a middle portion (23), by which it is secured to the base (16), and each disposed respectively at the ends of said middle portion (23), two wings, who form the contact parts (21).   4. Link connector according to claim 3, characterized in that said wings each form an acute angle (V) with the middle portion (23) they frame. 5. Link connector according to any one of   claims 3, 4, characterized in that said wings are   each extend by a return (24) parallel to themselves. 6. Link connector according to any one of   Claims 3 to 5, characterized in that said   connection (20) is a round wire pin.   7. Link connector according to any one of   Claims 2 to 6, characterized in that said   connection (20) is housed in a recess (25) of the base (16) which, elongated in the form of a slot, opens out on the surface thereof, and only the contact pieces (21) which it   emerging form of this recess (25).   8. Connection connector according to claim 7, characterized in that said recess (25) has three openings, one (32) in its central zone, and two,   (33>, each respectively at its ends.   9. Link connector according to any one of   claims 7, 8, characterized in that by its part   median (23), the connecting member (20) is snapped under a hook (35) present for this purpose at the bottom of the recess (25) in which it is housed.   10. Link connector according to any one of   Claims 1 to 9, characterized in that it comprises   parallel to each other, several organs of connection (20).   11. Connection connector according to the claims   7 and 10, taken together, characterized in that, its base (16) having a plurality of recesses (25), it is associated, at least some of said recesses (25), on   said base (16), a mark (29).   12. Link connector according to any one of   claims I to 11, characterized in that, along   at least one of its longitudinal sides, its base (16)   present, laterally projecting, a tongue (39).   13. Connection connector according to claim 12, characterized in that said tongue (39) comprises two successive sections (39A, 39B) of different heights,   forming, in its median zone, a step (40).   14. Link connector according to any one of   claims 12, 13, characterized in that said   tongue (39) extends to the base of the base (16).   15. Link connector according to any one of   claims 1 to 14, characterized in that for its   guided along the mounting rail (11), the base (16) has, projecting on its lower surface, along at least one of its longitudinal sides, at least one lug (42). 16. An electrical appliance which is snap-fitted on a mounting rail, of the type comprising, in a housing (12), for serving one or more components, at least one contact track (22), characterized in that that for implementation of a connector   linker (15) according to any one of the claims   1 to 15, the housing (12) has, at its base, at at least one of its transverse ends, a recess (17A, 17B, 17'B) into which said contact track (22) opens and in which which can engage said connector link (15).   Electrical apparatus according to claim 16, characterized in that the transverse contour of said recess (17A, 17B, 17'B) is at least partly in the profile of the base (16) of the connecting connector (15), and , in particular, the latter having a laterally protruding tongue (39) according to claim 12, it has, laterally, in correspondence, a recess (41, 42 ', 42 ") whose height corresponds to that of this tongue ( 39). Electrical apparatus according to claim 17, characterized in that said tongue (39) comprising, according to claim 13, two successive sections (39A, 39B) of different heights (HA, HB), the height (H'A, H'B) of said lateral recess (41, 42 ', 42 ")   corresponds to one or the other of these.   19. Electrical apparatus according to any one of   Claims 16 to 18, characterized in that it is provided   transversely, in its recess, a stop (44) clean   to limit the engagement of a connection connector (15).   20. Electrical apparatus according to any one of   Claims 16 to 19, characterized in that a   recess (17B, 17'B) at one and the other of its transverse ends. 21. Electrical apparatus according to any one of   Claims 16 to 20, characterized in that, comprising,   in its casing (12), for the serving and / or support of its component (s), a printed circuit board (13), this printed circuit board (13) opens into its recess (17A, 17B, 17'B and the corresponding contact track (22) is present at its lower surface.