EP1220254A1 - Electromechanical contactor having a play to allow the clamping of conductors - Google Patents

Abstract

The electromagnetic command contactor has conductors gripped between a first jaw (60) belonging to a container and a second jaw (59) belonging to the body (12). The body is assembled in a container by gripping (61) with a play allowing the conductor grip jaws to grip the assembly grip.

Description

• au moins une paire de conducteurs présentant chacun une partie extrême dont le bout porte ou forme un contact fixe ;
• au moins un pont de contact apte à occuper une position de fermeture dans laquelle il établit une connexion électrique entre les contacts fixes, et une position d'ouverture dans laquelle il se trouve à distance desdits contacts fixes ;
• un électro-aimant comprenant une bobine, une armature fixe associée à ladite bobine, une armature mobile, ledit électro-aimant admettant une position de repos dans laquelle les armatures sont écartées l'une de l'autre, et une position de travail dans laquelle les armatures se trouvent plaquées l'une contre l'autre ;
• un actionneur couplé à ladite armature mobile pour entraíner ledit pont de contact ; et
• une carcasse portant ladite bobine, et assemblée audit boítier.

The invention relates to an electromechanically controlled contactor of the type comprising, in a fixed housing:

• at least one pair of conductors each having an end part whose end carries or forms a fixed contact;
• at least one contact bridge capable of occupying a closed position in which it establishes an electrical connection between the fixed contacts, and an open position in which it is spaced from said fixed contacts;
• an electromagnet comprising a coil, a fixed armature associated with said coil, a movable armature, said electromagnet admitting a rest position in which the armatures are spaced from each other, and a working position in which the frames are pressed against each other;
• an actuator coupled to said movable armature to drive said contact bridge; and
• a carcass carrying said coil, and assembled to said housing.

This type of contactor, known from document FR-2 652 947, has a a number of drawbacks.

When the contact bridge is in the closed position, it is subject to resistance to opening which tends to keep it stuck to fixed contacts.

When the contact bridge is driven to its open position, the presence of this resistance temporarily keeps the bridge of contact with fixed contacts, which causes a displacement of the conductors which tend to accompany the contact bridge before coming off suddenly.

This results in a lack of precision and speed of operation of the contactor because the separation of the contact bridge and the fixed contacts is delayed. This affects the reliability of the contactor.

The invention aims to overcome in particular the aforementioned drawbacks, by offering a contactor that is reliable, precise and fast, while presenting a simple structure facilitating its assembly.

• chaque conducteur se trouve immobilisé en étant serré entre une première mâchoire appartenant au boítier et une deuxième mâchoire appartenant à la carcasse ;
• ladite carcasse est assemblée au boítier par l'intermédiaire d'au moins un moyen de serrage ;
• il existe entre le boítier et la carcasse, au niveau dudit moyen de serrage, un jeu apte à permettre le serrage du conducteur entre les mâchoires au moyen dudit moyen de serrage.

To this end, the invention proposes a contactor of the aforementioned type, characterized in that:

• each conductor is immobilized by being clamped between a first jaw belonging to the housing and a second jaw belonging to the carcass;
• said carcass is assembled to the housing by means of at least one clamping means;
• there is between the housing and the carcass, at said clamping means, a clearance capable of allowing the clamping of the conductor between the jaws by means of said clamping means.

So the conductors are held firmly, so that the separation of contact bridge and fixed contacts, when ordering the opening by the electromagnet is both immediate and abrupt.

The tightening of the conductors between pre-existing parts, namely the housing and coil housing, requires no new parts. The mounting the contactor is therefore not complicated.

According to one embodiment, the carcass comprises a base which has at least one foot forming said second jaw, projecting longitudinally towards said first jaw, and in that the housing comprises, opposite said foot, at least one tab forming said first jaw, projecting longitudinally from the housing to said carcass.

The contactor is for example bipolar, and therefore comprises two pairs of conductors. The base then includes in particular four feet substantially parallel, while the housing has four legs facing each other said feet for tightening the four conductors.

In addition, the base may have, between two adjacent feet, a housing adapted to receive said fixed frame.

This housing comprises for example an extended abutment surface between said feet, against which is likely to be pressed said fixed frame in the working position of the electromagnet, while it is provided between said abutment surface and said armature fixes a clearance in the rest position of the electromagnet.

According to one embodiment, said clamping means is a screw.

The housing has for example a through hole forming a passage for the screw, while the base has, for example opposite said hole through, a threaded bore adapted to receive said screw, coaxial with said hole crossing.

The through hole is for example made in a projecting chimney of the case towards the carcass.

The bore is, for its part, practiced for example in a barrel which is provided the base, facing said chimney.

Preferably, the housing has a capacity to flex, in line with said clamping means, in the direction of the carcass.

And, when the tightening means is a screw, the housing is suitable, thanks to its own elasticity, to slow down the free rotation of the screw and thus maintain constant tightening the conductors.

According to one embodiment, each conductor has a part end whose end carries or forms said fixed contact, the conductor being immobilized, by being clamped between said jaws, at this part extreme.

• la figure 1 est une vue en perspective éclatée d'un contacteur conforme à l'invention ;
• la figure 2 est une vue en perspective d'un contacteur conforme à l'invention, assemblé, et dont le corps de boítier est partiellement arraché pour laisser entrevoir des éléments constitutifs du contacteur ; ce dernier est représenté suivant un mode de fonctionnement du type « à fermeture », en position de repos de l'armature mobile de son électro-aimant ;
• la figure 3 est une représentation du contacteur de la figure 2 suivant un autre angle de vue ;
• la figure 4 est une vue similaire à la figure 2, sur laquelle le contacteur est représenté en position de travail de l'armature mobile ;
• la figure 5 est une représentation du contacteur de la figure 4 suivant le même angle de vue qu'à la figure 3 ;
• la figure 6 est une représentation schématique en coupe partielle du contacteur des figures 2 à 5, dans la position des figures 2 et 3 ;
• la figure 7 est une représentation schématique du conducteur similaire à la figure 6, dans la position des figures 4 et 5 ;
• les figures 8 à 11 sont des vues analogues respectivement aux figures 2 à 7, le contacteur étant représenté suivant un mode de fonctionnement du type « à ouverture » ;
• les figures 12 et 13 sont des représentations schématiques analogues respectivement aux figures 6 et 7, du contacteur représenté sur les figures 8 à 11 ;
• la figure 14 est une représentation en perspective en arraché du contacteur de la figure 2, suivant un autre angle de vue ; et
• la figure 15 est une représentation partielle du contacteur de la figure 14, suivant un autre angle de vue.

Other objects and advantages of the invention will become apparent in the light of the following description of embodiments of the invention, provided by way of nonlimiting examples, description made with reference to the appended drawings in which:

• Figure 1 is an exploded perspective view of a contactor according to the invention;
• Figure 2 is a perspective view of a contactor according to the invention, assembled, and the housing body is partially broken away to allow glimpses of the constituent elements of the contactor; the latter is shown in an operating mode of the "closing" type, in the rest position of the movable armature of its electromagnet;
• Figure 3 is a representation of the contactor of Figure 2 from another angle of view;
• Figure 4 is a view similar to Figure 2, in which the contactor is shown in the working position of the movable frame;
• Figure 5 is a representation of the contactor of Figure 4 from the same angle of view as in Figure 3;
• Figure 6 is a schematic representation in partial section of the contactor of Figures 2 to 5, in the position of Figures 2 and 3;
• Figure 7 is a schematic representation of the conductor similar to Figure 6, in the position of Figures 4 and 5;
• Figures 8 to 11 are views similar to Figures 2 to 7 respectively, the contactor being shown in an operating mode of the "opening"type;
• Figures 12 and 13 are schematic representations similar to Figures 6 and 7, respectively, of the contactor shown in Figures 8 to 11;
• Figure 14 is a perspective view in cutaway of the contactor of Figure 2, from another angle of view; and
• Figure 15 is a partial representation of the contactor of Figure 14, from another angle of view.

In the figures is shown a control switch 1 electromechanical of the type designed in particular to connect to the electrical distribution an electrical appliance (not shown).

The contactor 1 comprises a housing 2 in which is housed an electromagnet 3, the power supply of which controls the operation of the electrical appliance.

The housing 2 comprises a housing body 4 intended to be fixed so removable on a rail of an electrical cabinet (not shown) by means of a hanging system composed of a pair of claws 5, 6 facing each other, one of which 5 at least is sliding, and is biased towards the other 6 by a return spring 7. The housing 2 further comprises a cover 8 which surmounts the housing body 4 being both fitted and snapped into it. The cover 8 is in hat shape and has a nose 9 intended to be engaged in the window a faceplate (not shown) of the electrical cabinet, to provide access to the less visible to contactor 1.

The electromagnet 3 comprises on the one hand, a fixed part 10 including a coil 11 supported by a carcass 12 fixed to the housing 2 and a fixed armature 13 associated with the coil 11, and, on the other hand, a movable armature 14 located opposite the fixed frame 13.

The movable frame 14 is able to assume a rest position (FIGS. 2, 3, 6, 8, 9, 12, 14) in which it is separated from the fixed frame 13 by being located at an air gap therefrom, and a working position (FIGS. 4, 5, 7, 10, 11, 13) in which it is pressed against the fixed frame 13. The movable armature 14 is biased towards its rest position by a spring reminder 15 which bears against the housing body 4.

In the rest position, the movable armature 14 is retracted into the nose 9 of cover 8, which thus forms a housing for receiving it (FIGS. 2, 8).

An actuator 16 is coupled to the movable frame 14 to drive a contact bridge 17, 17 ′ capable of establishing an electrical connection between a first and a second conductor 18, 19, mounted in the housing body 4, and located opposite.

As it appears in FIG. 1, the contactor 1, of the bipolar type, comprises two first conductors 18 and two second conductors 19.

For its connection to the electrical network, the contactor 1 comprises two first power terminals 20 disposed on the same side of the housing 2, and one of which is intended to connect one of the first conductors 18 to a pole of the network, while the other is intended to connect the other first conductor 18 to another pole of the network.

Two second power terminals 21 are also provided for similarly connect the second conductors 19 to the device electric.

As it appears in Figure 1, each power terminal 20, 21 is arranged to pinch a bare electrical wire from the electrical network.

For this purpose, each terminal 20, 21 has a connection element mobile 22 slidably mounted in the housing body 4, the sliding of this element 22 being controlled by a clamping screw 23 engaged in a hole 24 of the cover 8, and which, bearing on the conductor 18, 19, causes by its rotation the pinching of the bare wire between the connection element 22 and the conductor 18, 19, on which the connection element 22 is engaged.

Each power terminal 20, 21 is mounted in the housing body 4 next to a window 25 made therein for the passage of the bare wire electrical network correspondent.

In order to confuse the user of contactor 1 when connecting this to the network or to the electrical device, the connection element 22 has a projection 26 forming a flap capable of closing the window 25 during sliding of element 22 (FIG. 2).

The contactor 1 further comprises two control terminals 27 for the connection of the coil to a supply control circuit thereof.

Each first conductor 18 has an end portion 28, the door end or forms a fixed contact 29, while each second conductor 19 has an end portion 30 disposed opposite the end portion 28 of the first conductor 18, this end portion 30 also carrying or forming a fixed contact 31.

Each contact bridge 17, 17 'is in the form of a conductive strip whose ends carry or form a movable contact 32, 33 can be applied against a fixed contact 29, 31 to connect between them the conductors 18, 19.

The contact bridge 17, 17 'is able to occupy a closed position in which it establishes an electrical connection between the fixed contacts 29, 31 via, respectively, movable contacts 32, 33, and a position opening in which it is remote from the conductors 18, 19, these movable contacts 32, 33 then being spaced from the fixed contacts 29, 31.

The positions of the contact bridge 17, 17 'are controlled by the electromagnet 3, and more specifically by the movement of the movable armature 14.

There are two operating modes of contactor 1, namely a operating mode called "closing", and operating mode called "Open".

In the closing type operating mode, the contact bridge 17 is arranged to occupy its closed position, that is to say connect the fixed contacts 29, 31, in the working position of the movable armature 14, as it appears in Figures 4 and 5, as well as in Figure 7. Such a contact bridge 17 is said to be of the "closing" type.

In the rest position of the movable armature 14, the contact bridge 17 occupies its open position, as it appears in Figures 2 and 3, as well as in figure 6.

In the working position of the movable armature 14, the contact bridge 17 occupies its closed position, as it appears in FIGS. 4, 5, as well as in figure 7.

In the opening operating mode, the contact bridge, referenced 17 'for clarity, is arranged to occupy its position of closing, that is to say to connect the fixed contacts 29, 31, in the position of rest of the movable armature 14, as it appears in FIGS. 8 and 9, as well as in FIG. 12. Such a contact bridge 17 ′ is said to be of the “opening” type.

In the working position of the movable armature 14, the contact bridge 17 ' occupies its open position, as it appears in Figures 10 and 11, as well as in Figure 13.

The contactor 1 is arranged to operate both when opening and when closure, as shown in what follows.

The actuator 16 has a U-shaped section and includes a transverse base forming a contact carrier block 34 of which project two branches opposite parallels 35 which each have one end 36 engaged on the end of a transverse rod 37 passing through a bore of the movable frame 14, so that the actuator 16 is coupled to the movable armature 14.

The contact holder block 34 includes two paired contact holders 38 located substantially in the extension of the branches 35.

Each contact carrier 38 comprises two superimposed compartments, know an upper compartment 39 adapted to receive a contact bridge 17 of the closing type, as well as a lower compartment 40 adapted to receive a bridge contact type 17 'of the opening type.

The upper compartment 39 and the lower compartment 40 are separated from each other by a partition 41 having two opposite faces respectively forming a first abutment surface 42 looking towards the movable frame 14, and a second abutment surface 43 looking towards the opposite.

The upper compartment 39 is delimited longitudinally on the one hand by the first abutment surface 42, on the other hand by a transverse face 44 in look of it, and, transversely, by two upper walls 75, longitudinal, opposite.

In closing operating mode, a contact bridge 17 of the type closure is inserted in the upper compartment 39 when requested towards its closed position by a contact spring 45 operating at the compression, which is associated with it, and which rests on the one hand on the bridge of contact 17, and on the other hand against the transverse face 44, so that the assembly contact bridge 17- spring 45 is embedded in the contact holder block 34.

In order to avoid any movement of the contact spring 45, its end located on the side of the transverse face 44 is fitted onto a protruding stud 76 of it, while its opposite end is housed in a reserve in hollow 77 formed in the contact bridge 17, while being held there by through the upper walls 75.

Accompanying the movable frame 14, the contact block 34 moves longitudinally in a space 46 formed between, on the one hand the electromagnet 3, more particularly the fixed frame 13, and on the other hand a bottom wall 47 of the body 4.

In the working position of the movable frame 14, as it appears on the Figures 4, 5, 7, the contact bridge 17 is pressed against the conductors 18.19 and held in this position by means of the contact spring 45 which is compressed between the contact bridge 17 and the face 44.

When the movable armature 14 returns to its rest position, towards which it is stressed by the return spring 15, the contact bridge 17 is located detached from the conductor 18, 19 while being driven towards its open position by the actuator 16, by means of the first abutment surface 42, against which is is placed against the contact bridge 17 by the trigger of the contact spring 45 (Figures 2, 3, 6).

The lower compartment 40 is delimited longitudinally, on the one hand by the partition 41, and on the other hand by a wall 48 substantially parallel to the partition 41, forming a free end of the actuator 16, and separating the lower compartment 40 from the bottom wall 47. The compartment lower 40 is delimited transversely by two lower walls 78, longitudinal, opposite.

In the operating mode with contactor 1 opening, a bridge contact 17 'with opening is inserted in the lower compartment 40.

In the rest position of the movable frame 14, as it appears on the FIGS. 8, 9, 12, the contact bridge 17 ′ is glued against the conductors 18, 19 while being held in this position by a contact spring 49 to compression which is supported on the one hand on the contact bridge 17 ', and on the other hand on a bearing surface 50 of the bottom wall 47 of the housing body 4, turned to the movable frame 14.

In order to allow this arrangement, there is between the second surface of stop 43 and this bearing surface 50 a space adapted to receive the spring contact 49.

It is thus made in the wall 48 of the lower compartment 40, a hole through 51 in which is engaged the contact spring 49, so that this is not on board the contact holder block 34, but is independent of the latter.

Thus, in the rest position, the movable armature 14 is not stressed towards this position only by its return spring 15.

When the movable armature 14 passes into its working position, as it appears in Figures 10, 11, 13, the actuator 16 drives the contact bridge 17 ' towards its open position against its contact spring 49, by means of the second abutment surface 43 and against the return spring 15.

The wall 48 makes it possible in particular to stiffen the contact holder block 34, while that the through hole 51, which here has a diameter slightly greater than that of the spring 49, makes it possible to avoid any bending and any untimely escape of it.

And, in order to avoid any movement of the contact spring 49, its end located on the side of the bottom wall 47 is fitted on a pin 52 projecting from the bottom wall 47 of the housing body 4 (Figures 8, 9), while its end opposite is housed in recess 77 formed in the contact bridge 17 ', while being held there by means of the lower walls 78.

Furthermore, the spring 49 has, without stress, a propeller pitch, that is to say a distance between two successive turns, of value less than that of the thickness of the partition 48, so as to avoid any risk of engagement of the spring 49 with the partition 48 between two successive turns.

The electromagnet 3 will now be described in more detail.

The carcass 12 is of substantially I-shaped section, and comprises a base 54 and a plate 55 connected by a central core 56 hollow around which is wound the coil 11 which is trapped between the base 54 and the plate 55.

Each frame 13, 14 has an E-shaped section, and has two end branches 57 framing the coil 11 and its carcass 12, thus that a central branch 58 engaged inside the core 56.

The carcass 12 has four feet 59 which project from the base 54 in direction of the bottom wall 47 of the housing body 4.

The latter includes four legs 60, arranged opposite feet 59. The legs 60 project from the bottom wall 47 with which they are coming from material, towards the carcass 12.

The extreme part 30, 31 of each conductor 18, 19 is located immobilized by being clamped, near the fixed contact 29, 31, between a first jaw belonging to the housing 2 and formed by one of the legs 60, and a second jaw belonging to the carcass 12, and formed by the foot 59 corresponding.

The assembly of the carcass 12 to the housing body 4 and the tightening of end portions 28, 30 of the conductors 18, 19 are secured by two screws 61.

Each screw 61 is inserted into a through hole 62 made in the bottom wall 47 of the housing body 4, and forming a passage for the screw 61, the latter being also engaged in a threaded bore 63 of the base 54, located in look of the through hole 62 and coaxial with it.

To guide the screw during assembly of the carcass 12 to the housing body 4, the through hole 62 is made in a chimney 64 projecting from the bottom wall 47 towards the carcass 12.

The bore 63 is made in a barrel 65 projecting from the base 54 towards the bottom wall 47, facing the chimney 64.

When the carcass 12 is assembled to the housing body 4, the end portions 28, 30 of the conductors 18, 19 being arranged between the jaws 59, 60, there are between the housing body 4 and the carcass 12, at level of the screw 61, a clearance J suitable for allowing the tightening of the end parts 28, 30 between the jaws 59, 60 by means of the screws 61.

Here, the clearance J is the distance which separates the chimney 64 from the barrel 65 when assembly of the carcass 12 to the housing body 4 is carried out, at least before that the conductors 18, 19 are not tightened.

In addition, in order to maintain a tension on the screws 61 making it possible to avoid their loosening, the bottom wall 47 has a capacity to flex during tightening the screws 61, towards the carcass 12.

Thus, by its own elasticity, the bottom wall 47 exerts on the screws 61 a traction which slows down their free rotation.

When the conductors 18, 19 are tightened, the clearance J can cancel each other out, in particular by bending the bottom wall 47, the chimney 64 and the barrel 65 then coming into contact. This prevents excessive tightening of the screws 61, which could damage or even break the housing body 4.

Furthermore, the actuator 16 is guided in its movement by grooves provided for this purpose in the housing body, while it is biased towards the rest position by the return spring 15 which is compressed, in the space 46, between the contact carrier block 34 and the bottom wall 47 of the body housing 4.

To ensure its guidance, the return spring 15 is firstly inserted in the bore of a cylindrical well 66 produced in the contact holder block 34 and located between contact holders 38.

The return spring 15 is on the other hand fitted onto a stud 53 forming a stop for the spring 15, and projecting from the bottom wall 47 with which it came from.

The contactor 1 comprises other constituent elements, which are described succinctly now.

Among other things, there is provided a plate 67 snapped into the body of case 4, on which is slidably mounted a pusher 68 movable between three stable positions, i.e. an automatic operating position, a forced operation position, as well as a deactivation position.

The plate 67 also forms a guide for a lever 69, one of which end is fitted onto rod 37, while the other end forms a retractable indicator 70 capable of appearing or disappearing, depending on the position of the movable frame 14, opposite a window 71 closed by a flap 72 allowing access to the pusher 68.

Furthermore, the base 54 of the carcass 12 has, between two feet 59 adjacent located on the same side of the base 54, a housing 73 in which is introduced the fixed frame 13.

This housing 73 has an extended transverse abutment surface 74 between the feet 59, looking towards the bottom wall 47 of the housing body 4, and against which the fixed frame 13 is pressed in the working position of the frame 14.

On the other hand, in the latter's rest position, there is a clearance between the fixed armature 13 and this abutment surface 73, while the contact-carrying block 34 is pressed against a rib 79 of the base 54 (Figures 6, 15 especially).

According to a first alternative embodiment not shown, each door contact 38 includes a single compartment of the lower compartment type 40 described above and adapted to receive both a contact bridge of the type to closing than an opening type contact bridge.

In this case, the first abutment surface 42 is carried by the wall 48 of the compartment, while the second abutment surface 43 is formed by an upper transverse face of the compartment, opposite the first abutment surface 42.

Furthermore, it is possible, depending on the configuration of the contactor 1, to use only one clamping screw 61, or use a number strictly greater than two.

In addition, in order to simplify the manufacture of the contactor 1, it can be advantageous to produce the thread of the bore 63 during assembly, at by means of the screw 61 itself, the latter then exercising a function additional tap.

And, according to a second variant embodiment not shown, it is also possible to replace screws 61 by other tightening means analogues to achieve the same result. We can in particular use rivets or nails.

According to a third alternative embodiment, the conductors are found immobilized by being clamped between the jaws 59, 60, elsewhere than at their ends, depending on the configuration of the contactor, shape or arrangement conductors.

According to a fourth variant not shown, the contactor is multipolar, for example of the quadrupole type, the contact block comprising for this purpose two pairs of contact carriers, one of these pairs operating by example on opening, while the other of these pairs works on closing.

It is of course possible to combine the different variants without departing from the scope of the invention.

Claims (11)

Electromechanically controlled contactor, comprising, in a fixed housing (2): at least one pair of conductors (18, 19) carrying or forming a fixed contact (29, 31); at least one contact bridge (17, 17 ') capable of occupying a closed position in which it establishes an electrical connection between the fixed contacts (29, 31), and an open position in which it is located at a distance from said contacts fixed contacts (29, 31); an electromagnet (3) comprising: a coil (11); a fixed frame (13) associated with said coil (11); a movable frame (14); said electromagnet (3) admitting a rest position in which the armatures (13, 14) are spaced from each other, and a working position in which the armatures (13, 14) are pressed against it one against the other; an actuator (16) coupled to said movable frame (14) to drive said contact bridge (17, 17 '); a carcass (12) carrying said coil (11), and assembled to said housing (2); said contactor (1) being characterized in that : each conductor (18, 19) is immobilized by being clamped between a first jaw (60) belonging to the housing (2) and a second jaw (59) belonging to the carcass (12); said carcass (12) is assembled to the housing (2) by means of at least one clamping means (61); there is between the housing (2) and the carcass (12), at said clamping means (61), a clearance (J) adapted to allow the clamping of said conductor (18, 19) between the jaws (59, 60) by means of said clamping means (61). Contactor according to claim 1, characterized in that said carcass (12) comprises a base (54) which has at least one foot (59) forming said second jaw, projecting longitudinally towards said first jaw, and in that the housing ( 2) comprises, facing said foot (59), at least one tab (60) forming said first jaw, projecting longitudinally from the housing (2) towards said carcass (12). Contactor according to claim 2, characterized in that , said contactor (1) comprising two pairs of conductors (18, 19), said base (54) comprises four feet (59) substantially parallel, while the housing (2) comprises four legs (60) opposite said feet (59) for tightening the four conductors (18, 19). Contactor according to claim 3, characterized in that said base (54) has, between two adjacent feet (59), a housing (73) adapted to receive said fixed frame (13). Contactor according to claim 4, characterized in that said housing (73) has an abutment surface (74) extended between said feet (59), against which said fixed armature (13) can be pressed against in the working position. the electromagnet (3), while there is provided between said abutment surface (74) and said fixed armature (14) a clearance in the rest position of the electromagnet (3). Contactor according to one of claims 1 to 5, characterized in that said clamping means (61) is a screw. Contactor according to one of claims 2 to 5, characterized in that said clamping means (61) is a screw, and in that said housing (2) has a through hole (62) forming a passage for the screw (61 ), and in that said base (54) has, opposite said through hole (62), a bore (63) adapted to receive said screw (61), coaxial with said through hole (62). Contactor according to claim 7, characterized in that said through hole (62) is made in a chimney (64) projecting from the housing (2) towards the carcass (12). Contactor according to claim 8, characterized in that said bore (63) is formed in a barrel (65) which is provided with the base (54), facing said chimney (64). Contactor according to one of claims 1 to 9, characterized in that the housing (2) has a capacity to flex, in line with said clamping means (61), in the direction of the carcass (12). Contactor according to one of claims 1 to 10, characterized in that each conductor (18, 19) has an end part (28, 30) the end of which forms or carries said fixed contact (29, 31), and in that the conductor (13, 19) is immobilized, being clamped between said jaws (59, 60), at its end portion (28, 30).

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