FR2722034A1 - DEVICE FOR COUPLING A PAIR OF MODULES AND ITS APPLICATION TO COMPLEMENTARY ELECTRICAL CONNECTORS - Google Patents

Abstract

The device comprises two complementary auxiliary blocks (3, 4, 5). A first block (3) is associated with a base (1) and a second (4,5) is associated with a plug (2) to be coupled. The first block (3) is provided with a pin (31) comprising a longitudinal groove (3132) and a groove in a central zone. The second block comprises two parts (4, 5), movable with respect to one another, the second (5) acting as an elastic lever (540). Both have an orifice of section complementary to the pin (31). The groove traps the movable part (5) to achieve locking. The pin (31) is provided with a screw thread for fixing the base (1) on a panel (6). Application in particular to aeronautical connectors.

Description

The present invention relates to a device for coupling a pair of

  additional modules and more particularly a pair of modules provided

coders.

  The invention is particularly applicable to electrical connectors

  complementary to quick coupling.

  In the case of connectors, "complementary" means the most

  often male and female connectors.

  In addition to the characteristics and properties specific to the functions to be fulfilled by electrical connectors (quality of electrical contacts, etc.), a number of requirements are most often added, some of which may moreover prove contradictory with each other or with the characteristics and / or properties

mentioned above.

  In the following. to fix ideas and without this being limiting in anything that is the scope of the invention, it will be considered the case of complementary electrical connectors First, it is most often necessary to provide the

  connectors to be coupled with a polarizing function.

  Many types of polarizing devices are known, in particular in the field of electrical connectors. The most common technique used is to use shaped connectors

  asymmetrical or with marks to align.

  Most of the polarizing devices of the known art correctly fulfill the function assigned to them. However, they present limited possibilities. In general, the only function assigned to these polarizers is to avoid plugging the connector of the first type upside down, to be coupled to a connector of a second type, for example a male connector to a female connector. . This is for example, in computer science, the case of connectors used to establish so-called "serial" or "parallel" links. Other connection devices include lugs or projections. on connectors of a first type, of profile complementary to grooves or notches made on connectors of a second type. This is the case, for example connectors used in particular in telephony or in the field of transmissions, commercially available under the

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  RJxx references, references in which xx is a representative number of the

  number of contacts the connector has.

  There are also connectors of substantially circular cross section.

  This is the case of sockets commonly called "DIN" in the audio frequency domain. The role of the polarizer is then to orient correctly, around

  of an axis of symmetry, the male and female sockets, one relative to the other.

  However, if there is in a complex connection device, for example a so-called patch cabinet in computer or telephone applications, different signal configurations for each connector, or at least for part of the connectors associated with this cabinet, it it is necessary to distinguish as many pairs of connectors, male and female, as there are separate signal configurations. It is easy to realize that the polarizing devices of the known art cannot solve the problem posed, that is to say the correct pairing of connectors of distinct configurations. We can naturally mark or identify each connector differently, but this

  solution, necessary for the identification of connectors, does not offer any security.

  Indeed, it does not "physically" prohibit an incorrect connection. One could also think of using connectors of distinct conformations (form, number of contacts, etc.) for each configuration of different signals, but

  this solution is not industrially viable.

  Second, it is necessary to lock the connectors, once

the coupling achieved.

  The locking operation, and moreover the dual unlocking operation, must be able to be carried out in a simple manner and offer all

  guaranteed security and reliability.

  Third, it is often necessary to attach one of the two parts of the connector to a panel or printed circuit boards. We generally speak of a base for the fixed part and a plug for the mobile part. We will speak in what follows, for the sake of simplification, of housings, these housings, of complementary type, which can moreover be indifferently associated with contacts

males or females.

  However, it may be necessary to modify the wiring, when the architecture of a system evolves, for example the architecture of a computer network. It may, in particular, be necessary to change the connection of a cable, that is to say to change the location of the male connector associated with this cable (naturally assuming that the connectors fixed to panels are of the female type) It is therefore desirable that the connector mounted on said panel can be removable, or

  at the very least can be assembled and disassembled, without requiring complex operations.

  This also implies that the "keying function", which has been

  mentioned above, cannot lead to fixed solutions.

  Last but not least, it is desirable to promote modularity as well as the standardization aspect of the devices and

organs used.

  It is indeed imperative, for most industrial applications,

  to use connectors meeting standards or at least de facto standards.

  They must therefore be able to adapt to many conditions of use and

  including various technological environments.

  European patent application EP-A-0 416 769 (AMP INC.) Discloses a connector comprising means offering modifiable polarization possibilities as well as simultaneously the possibility of locking. However, these means are complex and based on conventional screwing members. This arrangement involves relatively long operations to lock or unlock the

  two parts of the connector and, above all, to change the polarization position.

  According to this patent application, the means of polarization and

  locking devices are fixed, or at least semi-fixed, associated with the housings.

  This solution is therefore not optimized and offers little flexibility. It does not allow

  no longer high standardization and modularity.

  The invention aims to overcome the drawbacks presented by the devices

coupling of the known art.

  It also aims to respond simultaneously to the needs that are felt in the field of connectivity, and some of which

have just been recalled.

  To do this, the invention provides to provide each of the complementary boxes (base and plug) with at least one auxiliary block, these auxiliary blocks being paired to fulfill the polarizing function. More specifically, two types of auxiliary, complementary blocks are provided, each type

  being associated with one or the other of complementary boxes.

  In a preferred embodiment of the invention, these auxiliary blocks also fulfill the simultaneous functions of locking the connectors and

  for fixing the bases on a panel or similar element.

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  The invention therefore relates to a modular connection element, characterized in that it comprises on at least one of its lateral faces a groove

receiving an auxiliary unit.

  Another subject of the invention is a device for coupling a pair of modules of complementary types, of a first and of a second type, comprising at least one keying member, said complementary modules being able to be coupled by insertion of one of the modules in the other in a direction parallel to an insertion axis, characterized in that it comprises - at least one auxiliary block of a first type associated with a module of said first type comprising a pin s' extending along a longitudinal axis parallel to the insertion axis and provided with a section of a first particular profile; - At least one auxiliary block of a second type associated with a module of said second type comprising at least first means provided with a first orifice having a section of a second particular profile, complementary to said first particular profile; so as to define a particular keying combination from a predetermined set; and in that said first and second type auxiliary blocks are associated two by two and placed opposite one another, so that said coupling of the complementary modules of the pair is authorized if, and only if, said particular profiles associated with each of the auxiliary blocks are in spatial positions complementary to each other, authorizing the insertion of said pin in said first orifice. by translation along said longitudinal axis The invention finally relates to an electrical connector consisting of a

  base and a plug comprising such a coupling device.

  It is therefore easy to see that the invention perfectly achieves the aims

  that it has set, in particular it allows great modularity.

  The invention will be better understood and other characteristics and advantages

  will appear on reading the description which follows with reference to the appended figures,

  and among which: - Figures la and lb illustrate an embodiment, according to a preferred embodiment of the invention, of a connector housing used as a base and provided with auxiliary blocks of a first type, said blocks being dismantled and mounted, respectively; - Figure Ic illustrates a detail of said auxiliary blocks of a first type;

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  - Figures 2a to 2c illustrate an exemplary embodiment, according to a preferred embodiment of the invention, of a connector housing, of a second type, used as a plug and provided with auxiliary blocks of a second type, said blocks being disassembled and assembled, respectively; - Figures 3a to 3d illustrate the main phases of coupling of the complementary housings of a connector according to the invention; - Figure 4 illustrates, in perspective, a connector including the housings

  complementary are fully mated.

  - Figure 5 illustrates the uncoupling of complementary housings from a connector; - Figure 6 illustrates a support panel comprising several

  connectors comprising a coupling device according to the invention.

  We will assume in what follows that the base is formed by the female type housing of a connector. Such a base, produced in accordance with

  the invention is illustrated by Figures la to lc.

  The base consists of a female type housing 1 which includes a main body 10. It should be clear that the term "female" here designates the configuration of the housing itself and not the nature of the contact elements 1000 arranged at the bottom of the housing. 'A cavity 100 open on the front of the housing 1 and which is intended to receive the additional housing to be coupled, as will be specified below, in an insertion direction parallel to an axis which will be called below

insertion axis Ai.

  The configuration of the housing 1 can be arbitrary, with the exception of the following arrangement which constitutes a first important characteristic of the preferred embodiment according to the invention: the body 10 of the housing 1 comprises, at least on one of the lateral zones, a slide, and preferably two, 101 and

  102, arranged symmetrically, on either side of the body 10 of the housing 1.

  In these slides, 101 and 102, auxiliary blocks 30 (for example, in the direction of the arrows shown in FIG. 1a, that is to say perpendicular both to the lateral axes At and to the insertion Ai) of rectangular parallelepiped shape as illustrated in FIGS. 1 a and 1 b) comprising a pad 300 of shape complementary to that of the slides, 101 and 102. The pads 300 of the auxiliary blocks 3 as well as the lips of the slides, 101 and 102, advantageously include locking notches 3000 (Figure la) and 1020, respectively. These notches are provided with complementary profiles so that the blocks 30 cannot freely exit from the slides, 101 and 102, once

  inserted. The blocking is reversible, it suffices to exert a traction to loosen them.

  The loosening is authorized by the elasticity of the material used, in a conventional manner

a plastic material.

  The assembly is completed by a stop 1020, disposed at the bottom of the slide 102. Naturally, a similar arrangement (not visible in FIG. La)

  is retained for the slideway 101. These stops are advantageously arranged "head-

  spade "in the sense that one of the stops, 1020, is on the upper part (in FIG. 1a) of the body 10 of the base 1, and the other (not visible) on the lower part of this same body Block 3 on the left (in Figure la) is inserted from bottom to

  top and block 3 right from top to bottom, as shown by arrows f and f.

  According to another characteristic of the invention, each of the blocks 30 is provided, on its front face, with a pin 31. This extends in directions, respective axes A and A '(parallel to the direction of insertion, Ai), of a male type housing (not shown in the figures) in housing 1 (opening 100), when the blocks

  auxiliaries 3 are inserted in the slides, 101 and 102.

  In the example described, the pins 31, of circular section, are plugged into the body 30 of the block and comprise four main parts: a base 301 provided with a thread, a rear zone 311, a groove 312 of section smaller than

  other zones of the pin and a front zone 313 of end 3130 rounded.

  According to an additional characteristic of the invention, these pins 31 are provided, in the front zone, with a flat part 3131 and with a first longitudinal groove 3132. The latter advantageously extends, in the rear zone 311, by a second groove longitudinal 3110, aligned on the first groove 3132 relative to the axes A and A '. Preferably, the pawns are

  longitudinally striated on their outer surface.

  The usefulness of these provisions will appear in the description which follows.

  Finally, washers 32 are also provided, intended to be screwed

  on the threaded bases 301. As will be shown, also in the description

  below, these washers 32, cooperating with the threaded portion 310 of the pins 31, make it possible to fix the base, that is to say the housing 1, on a panel, a circuit

  printed or any other suitable medium.

  An exemplary embodiment according to a preferred embodiment of a male type 2 housing, or plug, intended to be coupled to the female housing 1, or base, which comes

  to be described with reference to Figures l a to I c, is illustrated by Figures 2a to 2c.

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  It comprises a main body 20, the front face of which is provided with a projecting member 200 intended to be inserted into the cavity 100 of a type housing.

  female 1, provided with electrical contact elements 2000.

  As before, according to one of the important characteristics of the invention, the body is provided with at least one lateral slide and, preferably, two slides arranged on either side, 201 and 202. We have also retained the

  "head to tail" provision mentioned above.

  In these slides, 201 and 202, auxiliary blocks are inserted. In reality, these blocks consist of two main parts, 4 and 5, cooperating one

  with the other, as well as with the auxiliary blocks 3 associated with the box I (Figures la -

  lb) playing the role of base. The slides, 201 and 202, are fitted with stops 2010 and

  2020, analogously to the slides 101 and 102 (Figures la and lb).

  The first part, 4, consists of a body 40, of generally rectangular parallelepiped shape (in the example illustrated). It is provided with a lateral pad 400 intended to be inserted in one of the slides, 201 or 202, so

  similar to what has been described for the pad 3 (Figures la and lb).

  Although they were not represented so as not to overload the figures. piece 4 and the slides. 201 and 202, are provided with locking notches, in a manner similar to that which has been described for the blocks 3 and the slides 101 and 102

(Figure la and 1 c).

  This part 4 plays the role of a keying element. To do this, it is provided, in a central region with an orifice 401 which pierces it right through, along axes A and A 'which coincide with the axes of the same references as those associated with the pins 31 (Figures la and lb), when the male and female housings are coupled, that is to say parallel to the direction of insertion Ai. The orifices 401 have a section of the same shape as those of the front part 313 of the pins 31 (FIGS. 1a and 1b). Preferably, the section is circular. In this case, the diameter of the orifices is equal to or slightly greater than the outside diameter of the aforementioned front part 313. The wall of the orifice 401 is advantageously striated in a direction parallel to the axes A and A '. In addition, to play the role of a polarizer, the wall of the orifice 401 has a protuberance 4010, of profile complementary to the groove 3132 (FIGS. 1a and 1b) and extending along a

  direction parallel to axes A and A ', that is to say along the insertion axis Ai.

  The angular orientation of these protrusions 4001, around these same axes, must correspond to that of the corresponding grooves 3132 (FIGS. 1a and 1b), or more exactly must be the complement. This provision allows the insertion of

pins 31 in the holes 401.

  A second part 5 is provided to complete the auxiliary block associated with the plug 2. This part 5 is intended to be slid inside the first part 4. To do this, the part 4 is provided with a slot 404, extending along a lateral axis At, perpendicular to the axis Ai-, and the part 5 of a flattened body 50, of

  suitable dimensions to be able to be inserted into said slot 404.

  The part 5 also comprises two guide tabs, upper 51 and lower 52, intended to be slid into grooves, 401 and 402, formed in the upper and lower walls, respectively, of the part 4. It finally comprises a lateral wing 53 , substantially flat and parallel to the axis At, lateral wing 53 extending by a part 54 folded towards the part 5. The latter has a central cutout 540 recessed towards the part 5. The material making up the part has elastic properties . It is for example a plastic material. The

  cut 540, as will be explained. acts as a leaf spring.

  The flattened body 50 is provided. in a central area, from an orifice 500 the

  piercing in a direction parallel to the axis Ai.

  Figure 2b illustrates the position reached by the elements 4 and 5, when they are mounted. In this figure. once the part 5, for example the part on the left, is fully inserted into the slide 202 (according to the arrow f down) and the part 4 is slid inside the latter, the orifices 401 and 500 are in alignment with each other (axes A and A '). However, for reasons which

  will be explained below, the profiles of the orifices 401 and 500 are not identical.

  If we again consider the auxiliary block on the left (in Figure 2b), composed of parts 4 and 5, the right part of the orifice 500 is adapted to the contour of the front part 313 of the pin which corresponds to it 31 (Figures la and lb), while the left part is provided with an oblong shape extending towards the lateral wing 53 and ending in a substantially planar and vertical wall. It follows that, along the axis At, the dimension of the orifice 500 is greater than the diameter of the pin 31 or, more generally, than the dimension of the pin 31 along this same axis. It also follows that the piece 5 can "play" along the axis At, even when the pawn

  31 was inserted through the two parts. via ports 401 and 500.

  Figure 2c illustrates sheet 2 mounted in rear perspective view.

  We will now illustrate the main phases of mating

  of a plug 2 on a base 1 with reference to Figures 3a to 3d.

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  In these figures, the elements common to Figures la to 2c have the same references and will only be described again as necessary. In addition, only the elements essential for a good understanding of the invention have been referenced,

  this not to overload the figures.

  In Figure 3a, there is shown the base I and the plug 2 in the disconnected state. In addition, the base 1 has been mounted on a panel 6, a printed circuit

  or similar item. Appropriate orifices were made on this panel, 60.

  61 and 62, to allow the body 10 of the base 1 to pass, on the one hand, and the pins 31, on the other hand. Indeed, according to an important characteristic of the invention, the device used for coupling can also be used for fixing the base 2 to the aforementioned panel 6. More precisely, the threaded base 310 of the pin 31 and

  nut 32 are used for this purpose.

  FIG. 3b illustrates a phase during which both a pre-guiding and a polarizing operation are carried out. Indeed, the pins 31, which serve as guide fingers, are introduced into the orifices 401. The insertion can only be effective if the position of the grooves 3132 of the ends 313 of pins 31 corresponds to the angular position relative to the axes A and A 'of the protrusions 4001 (FIGS. 2a and 2b). It is also necessary that the profiles of the above-mentioned growths 4001 and of the

  grooves 3132 are complementary.

  It is therefore easy to see that the coding is not carried out in all or nothing, as in the devices of the known art using profiles

  additional connectors (base parts and plug).

  We can play on the angular position of the pair "excrescence 4001 -

  groove 401 ". We can also provide several pairs distributed along the walls, knowing that an area is reserved for the flats 3131. We can finally play, in a

to some extent, on the profiles.

  Even by providing, for reasons of standardization for example or simplicity of construction, only one groove 3110 per pin 31, it can be seen that the number of possible combinations is important if two devices are used, located on either side. another of the members to be coupled, as illustrated in the figures. In the phase illustrated in FIG. 3c, the pins 31 have completely passed through the two parts 4 and 5, via the orifices 401 and 500 (FIGS. 2a and 2b). The flats 3131 begin to press on the elastic tabs formed by the central cutouts 540, which has the effect of exerting a force tending to spread the pieces 5 in a direction parallel to the axis At However, the walls of the orifices

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  500, facing the body 20 of the plug 1 are in contact with the outer surfaces of the ends 313 of the pins 31. The striated surfaces in contact slide

on top of each other.

  This elastic compression allows a guiding effect of the plug 2 during coupling with the base 1. It is also during this phase that

  the electrical contacts are coupled.

  Finally, just before the coupling is fully achieved, phase illustrated in Figure 3d, the grooves 312 formed on the middle part of the pins 31, pass at the level of the orifices 500. The thickness of the grooves 312 is sufficient for the parts 5 pushed outwardly by the elastic tabs 540 can slide therein in a translational movement along the axis At, until the flats rest on the flat walls of the orifices 500. This operation allows locking plug 2 automatically on the base 1, since it prohibits any movement along the axis Ai. front or rear. Part 5 therefore serves as a lock

mobile.

  To complete the description, we must add that the outgrowths

  4001 (Figures 2a and 2b) engaged during this final phase in the

  grooves 3110 made in the rear parts 311 of the pins 31.

  Figure 4 illustrates in perspective a coupled connector, that is to say in the state reached in the phase illustrated in Figure 3d. Only the reference signs essential for a good understanding of the invention have been shown in this figure. From this latter state, FIG. 5 illustrates the phase of uncoupling a plug 1 from the base 2. The latter is fixed to a

  support 6 or similar, as before.

  It is first necessary to unlock the coupling device. To do this, the levers 54 are pressed in antagonistic directions, fp and f'p, but parallel to the transverse axis At. This action has the effect of spreading, by a translational movement along this axis At, but in opposite directions (arrows fe and f'e) the bodies 50 of the parts 5, the tabs forming a spring 540 resting on the flats 3131 of the pins 31. It has been indicated, in relation to the

  description of FIG. 2a, that the orifice 500, drilled in the body 50 of the part 5,

  was provided with an oblong shape which allowed a limited clearance of this part in the slot 404 of part 4, precisely along the transverse axis At. The plate 50 therefore leaves the groove 312 of the pin 31 (see figure la for example ). If a tensile force is exerted on the body 20 of the plug 2 (either directly or through it 2722034 through the parts 5), the latter will then be able to be disengaged and the disconnection or decoupling carried out, the groove 312 no longer retaining the pin 31 prisoner. At the end of this uncoupling action, the plug 2 and the base are

  found in the state illustrated in Figure 3a.

  Fig. 6 schematically illustrates a complete panel 6, supporting three rows of connectors RC1 to RC3. The boxes are arranged vertically, side by side. Although three connectors have been shown in each row, this number is purely arbitrary. The same is true for the number of rows and

the orientation of the connectors.

  We can note that. although the connectors belonging to two successive rows, for example RC2 and Rc3, are arranged in proximity relation, the fact that the lugs 54 form a withdrawal towards the bodies of the connectors makes it possible to apprehend them because there remains a space "e" between two rows for y

  slide a tool or a finger with one hand.

  Each pair of "socket - plug" to pair, constituting a particular connector, is associated with a specific combination of coding, that is to say,

  auxiliary blocks 3, on the one hand. and 4 - 5. on the other hand. also specific. As indicated. the coding positions are determined by

  the angular position of the couple "groove - protuberance", and possibly by their number and the profile of this elements. It is therefore necessary to identify each combination unambiguously and easily. For example, the auxiliary blocks of two types, 3 on the one hand and 4 - 5 on the other, can be assigned color codes, each color being associated with a particular combination. This arrangement offers immediate visibility and great simplicity of implementation. Other types of marking can naturally be used engravings, bar codes, etc.

  It has been seen from reading the above description that

  the invention does achieve the goals it has set for itself. With a minimum of parts, it is possible simultaneously to perform the functions of precise coupling, locking, polarization and fixing of the housings on a panel or similar element, while offering great flexibility (high number of polarization positions in particular) and without increasing the complexity of manufacturing operations and their cost. The aspect

modular is also kept.

  Finally, the device according to the invention allows operations

  quick and easy coupling.

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  The materials which can be used in the context of the invention can be chosen from a wide range of materials. This choice, purely technological, is within the reach of the skilled person. The device according to the invention is moreover not associated, on this particular point, with any specific requirement except that the legs 540 must have elastic properties. These elements can therefore advantageously be made of plastic materials or of metal such as steel. The other elements (body of the auxiliary blocks, slides, pins) can be made of plastic, metal (steel, etc.) or an alloy. In reality, the choice will most often be imposed by standards or the field

application aims.

  It should be clear that the invention is not limited to only the examples of

  embodiments precisely described, in particular in relation to FIGS. 1 to 6.

  In particular, the auxiliary blocks of the first type, 3, and of the second type, 4-5, are entirely interchangeable between housings of the male and female types, the slides 101, 102 (figures la lc) or 201 and 202 (figures 2a and 2b) can be standardized. The auxiliary block. 3, that is to say of the first type, is more particularly intended for boxes used as a base since it allows the fixing of these boxes on a panel, with no additional members except

with a simple nut 32.

  The invention applies more particularly, although not exclusively, to the field of connectors, and more particularly to the field

  aeronautical, civil or military connectivity.

Claims (19)

  1. Modular connection element (1, 2), characterized in that it comprises on at least one of its lateral faces a groove (101, 201, 202) of   reception of an auxiliary unit (3, 4).   2. Modular element according to claim 1, characterized in that it comprises a front part for connection to a connection element of the complementary type (2) and in that it forms a base (1) for connection by addition of at least one of said auxiliary blocks (3), this auxiliary block being provided with fixing means (31, 32) of the modular element on a panel (6) provided with an opening (60) for passage of said front part of connection to a   connection element of complementary type (2).   3. Modular element forming a connection base (1) according to claim 2, characterized in that said auxiliary block (3) comprises a finger (31) for guiding the coupling of a connection element of the type complementary (2).   4. modular element forming a connection base (1) according to claim 2, characterized in that, said panel (6) being provided with at least one second opening (61, 62), said fixing means consist of a pin (31), plugged into the auxiliary block (3) and provided with a thread (310), the pin (31) being inserted into said second opening (61, 62), the fixing means further comprising a nut ( 32) able to be screwed onto the thread (310) of the pin (3) to trap said panel (6).   5. Modular element according to claim 1, characterized in that it forms connection plug (2) by adding at least one auxiliary unit (4) provided with a receiving cavity (401) of a guide finger (31) carried by a complementary type connection element (1), so that said auxiliary unit (4) guide block shape.   6. Modular element forming connection plug (2) according to claim 5, characterized in that said auxiliary guide block (4) is provided with a movable lock (5) opening into the receiving cavity (401) of the finger guide (31).   7. Modular element forming connection plug (2) according to claim 6, characterized in that said auxiliary guide block (4) comprises a spring element (540) pushing said movable latch (5) in a position 14 2722034   at least partially closing said cavity (401) for receiving the guide finger (31). 8. Modular element forming connection plug (2) according to claim 7, characterized in that said movable lock (5) is extended by an operating lug (53, 54) capable of pushing the movable lock (5) into a position   releasing said cavity (401) for receiving the guide finger (31).   9. Connection device comprising a first modular element (1) and a second modular element (2) according to claim 1, characterized in that said first modular element (1) is provided with at least a first auxiliary block (3) comprising a guide finger (31), in that the second modular element (2) is provided with at least one second auxiliary block (4) comprising a cavity (401) for receiving said guide finger (31) and in that that said guide fingers (31) and receiving cavity (401) cooperate to guide the elements   modular (1, 2) when they are coupled.   10. Connection device according to claim 9, characterized in that said guide finger (31) is provided with an annular groove (312) for receiving a movable lock (5) opening into said reception cavity (401) of the guide finger (31), carried by the second auxiliary block (4). so as to allow the   locking of the two connection elements (1, 2).   11. Connection device according to claim 10, characterized in that the introduction of said guide finger (31) pushes the movable lock (5) up   snapping it into said groove (312) of the guide finger (31).   12. Device for coupling a pair of modules of complementary types (1, 2), of a first and of a second type, comprising at least one keying member (3, 4, 5), said complementary modules (1, 2) can be coupled by insertion of one of the modules in the other in a direction parallel to an insertion axis (Ai), characterized in that it comprises - at least one auxiliary block of a first type (3) associated with a module of said first type (1) comprising a pin (31) extending along a longitudinal axis (A, A ') parallel to the insertion axis (Ai) and provided with a section of a first profile (3132, 3110) particular; - at least one auxiliary block of a second type associated with a module of said second type comprising at least first means (4) provided with a first orifice (401) having a section of a particular second profile, complementary to said first profile particular; 2722034   so as to define a particular keying combination from a predetermined set; and in that said first (3) and second (4) types auxiliary blocks are associated two by two and placed opposite one another, so that said coupling of complementary modules (1, 2) of the pair is authorized if, and only if, said particular profiles (401, 3132, 3110) associated with each of the auxiliary blocks (3, 4) are in spatial positions complementary to each other, allowing insertion of said pin (31) in said first orifice (401), by   translation along said longitudinal axis (A. S ').   13. Device according to claim 12, characterized in that said pin (31) has a circular section of determined diameter and comprises at least one longitudinal groove (3132. 3110) determining said first particular profile, and in that said first orifice (401) has a also circular section, of diameter slightly greater than said determined diameter, and is provided with a protrusion (4010) on its internal wall of profile complementary to the profile of said groove (3132, 3110), the angular positions relative of the groove (3132, 3110) and the projection (4010) having to be spatially complementary to each other   so as to define said particular keying combination.   14. Device according to claim 12, characterized in that the first means (4) of the auxiliary block of the second type comprise a body (40) of substantially rectangular parallelepiped shape comprising a slot (404) extending in a direction orthogonal to said axis transverse (5t), in that said auxiliary block of the second type further comprises second means comprising a flat body (50) intended to be inserted into said slot (404) and provided with a second orifice (500), of form oblong along said transverse axis (Ai) so as to allow itself to be traversed by said pin (31) during the coupling of said pair of complementary modules (1, 2), while allowing a translation of determined amplitude of said body (50 ) along the transverse axis (At), in that said second means (5) further comprise an elastic lever (540) folded back on the side opposite to said insertion, so as to press on the pin (31) when the latter spring of said first and second ports (404, 500) during coupling and   guide the modules (1, 2) during coupling.   15. Device according to claim 14, characterized in that the pin   further comprises a flat (3131) on which said elastic lever (540) rests.   16. Device according to claims 14 or 15, characterized in that the   pin has an annular groove (312) in a central zone and in that, 16 2722034   when the coupling of said pair of complementary modules (1I, 2) is carried out, said elastic lever (540), exerting a repulsive force by pressing on the pin (31), induces a translational movement of the body (50) of the second means (5), along a first direction of said transverse axis (At), so that the latter engages in said annular groove (312) of the pin (31) and causes locking of said pair of modules   complementary (1, 2) in the coupled state.   17. Device according to claim 16, characterized in that said second means (5) are further provided with an unlocking control member (53, 54), acting on said body (50), so as to release it from said groove (312), in translation in a second direction, opposite to said first direction, when it is subjected to a pressure force (fi) in this same second direction. and to allow uncoupling of said pair of complementary modules (1. 2). when simultaneously exerting an extraction force (ftr). parallel to the insertion axis (Ai) and in a direction opposite to the insertion. said body (50) returning to its initial position when the pressure force (fp) is released. by the effect of said elastic lever (540) pressing on the pawn (31).   18. Device according to claim 12, characterized in that said auxiliary block of the first type (3) comprises a body (30) of rectangular parallelepiped shape, in that the pin (31) is inserted into this body (30) and in what the basics   (310) of the pin (31), in an area contiguous to said body (30), is provided with a thread.   so as to allow the attachment of the module of said first type (1) to which it is   associated on a panel (6). a nut (32) tightening the panel on the body (30).   19. Device according to any one of claims 12 to 18.   characterized in that said auxiliary blocks of the first (3) and second (4, 5) types are removable, in that the bodies (10, 20) of the modules (1, 2) comprise slides (101, 102, 201, 202), in that the body (30) of said auxiliary blocks (3) of the first type and the body (40) of the first means (4) of said auxiliary blocks of the second type are both provided with pads (300, 4001) allowing an insertion in the slides (101, 102, 201, 202) so as to secure them so   reversible to the modules (1, 2) with which they are associated.   Device according to claim 19, characterized in that it is further provided with locking notches (1020, 3000) allowing temporary locking   said auxiliary blocks (3, 4, 5) in said slides (101, 102, 201, 202). 17 2722034   21. Electrical connector comprising boxes of complementary types (1, 2), characterized in that it comprises a device   coupling (3, 4, 5) according to any one of claims 12 to 20.