EP3227966B1 - Electrical connection element penetrating an electrical wire insulation sheath - Google Patents

Description

TECHNICAL FIELD TO WHICH THE INVENTION RELATES

The present invention relates generally to the field of electrical equipment which comprises so-called “insulation piercing” electrical connection elements making it possible to connect said equipment automatically (without tools) to the electrical supply wires coming from the network.

It relates more precisely to an electrical connection element with an insulating sheath piercing, in accordance with the preamble of claim 1.

It also relates to an electrical device comprising such an electrical connection element.

The invention finds a particularly advantageous application in the production of electrical terminals for outlets or electrical switching devices such as simple switches or two-way switches.

TECHNOLOGICAL BACKGROUND

In general, an “insulation piercing” electrical connection element is intended to make an electrical connection between an electrical device and an electrical wire comprising a conductive core surrounded by an insulating sheath.

When inserting the electric wire into the insertion slot of this electrical connection element, the cutting edge of the insertion slot pierces the insulating sheath of the electrical wire and comes into contact with the conductive core of the electrical wire.

The slot for introducing the connection element must thus be flexible enough to allow easy insertion of the electric wire while maintaining sufficient pressure on the conductive core of this electric wire to ensure good electrical contact between the stripped core. wire and the cutting edge of the slot for introducing the connection element in order to have the lowest possible contact resistance and to avoid overheating.

In addition, this connection element must ensure good transmission of the electric current from the electric wire thus connected to the electrical operating elements of the equipment provided with this electrical connection element.

Finally, this connection element has a compact shape allowing its use in a small space.

We know in particular from the document EP1484818 or document US5330367 such a connection element which however has the drawback of being made entirely from a material having high electrical conductivity, which makes it expensive to manufacture. In addition, the document GB1276449 relates to a clamping member for connecting electrical conductors without stripping them first. The latter member is defined as consisting of three tabs forming two clamping slots arranged side by side, which can be independent of each other both as regards the elastic properties of the material and its thickness.

OBJECT OF THE INVENTION

In order to remedy the aforementioned drawback of the state of the art, the present invention proposes a novel electrical connection element in which the quantity of material having high electrical conductivity is reduced, which makes it particularly economical.

More particularly, according to the invention there is provided an electrical connection element according to claim 1.

The electrical connection element according to the invention thus allows the establishment of an electrical connection of good quality between the conductive wire and that of the two separate parts of the connection element which is made of the material having the highest electrical conductivity. higher, while being particularly economical to manufacture.

It also retains a particularly compact shape.

Other advantageous characteristics of the connection element according to the invention may be those described in claims 2 to 17.

The invention further relates to an electrical apparatus as described in claims 18 and 19.

DETAILED DESCRIPTION OF AN EXAMPLE OF AN IMPLEMENTATION

The description which will follow with reference to the appended drawings, given by way of nonlimiting examples, will make it clear what the invention consists of and how it can be implemented.

• la figure 1 est une vue schématique en perspective d'un premier mode de réalisation de l'élément de connexion électrique selon l'invention,
• la figure 2 est une vue schématique de face de l'élément de connexion électrique de la figure 1,
• la figure 3 est une vue schématique du dessus de l'élément de connexion électrique de la figure 1,
• la figure 4 est une vue schématique en perspective de l'élément de connexion électrique de la figure 1 au-dessus duquel est disposé un fil électrique prêt à son introduction dans cet élément,
• la figure 5 est une vue schématique en perspective de l'élément de connexion de la figure 4 après connexion du fil électrique,
• la figure 6 est une vue schématique de face de l'élément de connexion électrique de la figure 5, le fil électrique étant représenté en coupe selon le plan P de la figure 7,
• la figure 7 est une vue schématique du dessus de l'élément de connexion électrique de la figure 5,
• la figure 8 est une vue schématique en perspective de l'élément de connexion électrique de la figure 1 au-dessus duquel sont disposés deux fils électriques avant leur introduction dans cet élément,
• la figure 9 est une vue schématique en perspective de l'élément de connexion électrique de la figure 8 après connexion des deux fils électriques,
• la figure 10 est une vue schématique de face de l'élément de connexion électrique de la figure 9, le fil électrique étant représenté en coupe selon le plan N de la figure 11,
• la figure 11 est une vue schématique du dessus de l'élément de connexion électrique de la figure 9,
• la figure 12 est une vue schématique en perspective avant, vue de dessus, d'un deuxième mode de réalisation de l'élément de connexion électrique selon l'invention,
• la figure 13 est une vue schématique en perspective arrière de l'élément de connexion électrique de la figure 12,
• la figure 14 est une vue schématique en perspective avant, vue de dessous, de l'élément de connexion électrique de la figure 12,
• la figure 15 est une vue schématique de dessus de l'élément de connexion électrique de la figure 12,
• la figure 16 est une vue schématique de face de l'élément de connexion électrique de la figure 12,
• la figure 17 est une vue schématique en perspective avant d'un troisième mode de réalisation de l'élément de connexion selon l'invention
• la figure 18 est une vue schématique en perspective, vue de dessous, de l'élément de connexion électrique de la figure 17,
• la figure 19 est une vue schématique de dessus de l'élément de connexion électrique de la figure 17,
• la figure 20 est une vue schématique de dessous de l'élément de connexion électrique de la figure 17,
• la figure 21 est une vue schématique de profil de l'élément de connexion électrique de la figure 17,
• la figure 22 est une vue schématique en perspective avant d'un quatrième mode de réalisation de l'élément de connexion selon l'invention,
• la figure 23 est une vue schématique en éclaté de l'élément de de la figure 22,
• la figure 24 est une vue schématique en perspective, vue de dessous, de l'élément de connexion électrique de la figure 22,
• la figure 25 est une vue schématique en éclaté de l'élément de connexion électrique de la figure 24, et
• la figure 26 est une vue schématique de face de l'élément de connexion électrique de la figure 22,
• la figure 27 est une vue schématique en perspective d'un cinquième mode de réalisation de l'élément de connexion selon l'invention,
• la figure 28 est une vue schématique de face de l'élément de connexion de la figure 27,
• la figure 29 est une vue schématique de dessus de l'élément de connexion de la figure 27,
• la figure 30 est une vue schématique de face de l'élément de connexion de la figure 27 avec un fil électrique inséré vu en coupe,
• la figure 31 est une vue schématique de face de l'élément de connexion de la figure 27 avec deux fils électriques identiques insérés vus en coupe,
• la figure 32 est une vue schématique de face de l'élément de connexion de la figure 27 avec deux fils électriques de sections différentes insérés vus en coupe.

In the accompanying drawings:

• the figure 1 is a schematic perspective view of a first embodiment of the electrical connection element according to the invention,
• the figure 2 is a schematic front view of the electrical connection element of the figure 1 ,
• the figure 3 is a schematic view from above of the electrical connection element of the figure 1 ,
• the figure 4 is a schematic perspective view of the electrical connection element of the figure 1 above which is an electric wire ready for its introduction into this element,
• the figure 5 is a schematic perspective view of the connection element of the figure 4 after connecting the electric wire,
• the figure 6 is a schematic front view of the electrical connection element of the figure 5 , the electric wire being shown in section along the plane P of the figure 7 ,
• the figure 7 is a schematic view from above of the electrical connection element of the figure 5 ,
• the figure 8 is a schematic perspective view of the electrical connection element of the figure 1 above which are arranged two electric wires before their introduction into this element,
• the figure 9 is a schematic perspective view of the electrical connection element of the figure 8 after connecting the two electric wires,
• the figure 10 is a schematic front view of the electrical connection element of the figure 9 , the electric wire being shown in section along the plane N of the figure 11 ,
• the figure 11 is a schematic view from above of the electrical connection element of the figure 9 ,
• the figure 12 is a schematic front perspective view, top view, of a second embodiment of the electrical connection element according to the invention,
• the figure 13 is a schematic rear perspective view of the electrical connection element of the figure 12 ,
• the figure 14 is a schematic front perspective view, seen from below, of the electrical connection element of the figure 12 ,
• the figure 15 is a schematic top view of the electrical connection element of the figure 12 ,
• the figure 16 is a schematic front view of the electrical connection element of the figure 12 ,
• the figure 17 is a schematic front perspective view of a third embodiment of the connection element according to the invention
• the figure 18 is a schematic perspective view, seen from below, of the electrical connection element of the figure 17 ,
• the figure 19 is a schematic top view of the element of electrical connection of the figure 17 ,
• the figure 20 is a schematic view from below of the electrical connection element of the figure 17 ,
• the figure 21 is a schematic side view of the electrical connection element of the figure 17 ,
• the figure 22 is a schematic front perspective view of a fourth embodiment of the connection element according to the invention,
• the figure 23 is a schematic exploded view of the element of the figure 22 ,
• the figure 24 is a schematic perspective view, seen from below, of the electrical connection element of the figure 22 ,
• the figure 25 is an exploded schematic view of the electrical connection element of the figure 24 , and
• the figure 26 is a schematic front view of the electrical connection element of the figure 22 ,
• the figure 27 is a schematic perspective view of a fifth embodiment of the connection element according to the invention,
• the figure 28 is a schematic front view of the connection element of the figure 27 ,
• the figure 29 is a schematic top view of the connection element of the figure 27 ,
• the figure 30 is a schematic front view of the connection element of the figure 27 with an inserted electric wire seen in section,
• the figure 31 is a schematic front view of the connection element of the figure 27 with two identical electric wires inserted seen in section,
• the figure 32 is a schematic front view of the connection element of the figure 27 with two electric wires of different sections inserted seen in section.

On the figures 1 to 32 , different embodiments of an electrical connection element 10 have been shown; 110; 210; 310; 410 which advantageously constitutes an electrical terminal of an electrical device such as a socket or any switch. It makes it possible to connect at least one electric wire 1, 2, 1A, 2A, 3A coming from the network to an electric component of said apparatus for its power supply.

Each electric wire 1, 2, 1A, 2A, 3A shown in the figures 4 to 11 and 30 to 32 comprises a conductive core 3, 4, 1B, 2B, 3B surrounded by an insulating sheath 5, 6, 1C, 2C, 3C.

This electrical connection element 10; 110; 210; 310; 410 has a first slot 11; 111; 211; 311; 411 introducing at least a first electric wire 1; 1A isolated. This slot 11; 111; 211; 311; 411 is delimited between two edges 11A, 11B; 111A, 111B; 211A, 211B; 311A, 311B; 411A, 411B of the connection element arranged vis-à-vis, at least one of which is cutting.

The term “cutting edge” is used here to mean an edge delimiting the slot of the connection element which is adapted to pass through the insulating sheath 5, 6; 1C, 2C, 3C of electric wire 1, 2; 1A, 2A, 3A to reach the conductive core 3, 4; 1B, 2B, 3B of this electric wire 1, 2; 1A, 2A, 3A.

To this end, in the first and fifth embodiments of the connection element 10; 410 shown on figures 1 to 11 and 27 to 32 , the cutting edge of the slot 11; 411 has cutouts 13; 413 which tear the insulating sheath 5 of the electric wire 1 as it passes through the slot, as explained below.

In the other three embodiments of the connection element 110; 210; 310 represented on figures 12 to 26 , the thickness itself of the cutting edge is thin enough to tear the insulating sheath, even in the absence of such cuts.

More particularly, the cutting edge can then be obtained by a striking process: the cutting edge is crushed so as to refine its thickness and facilitate tearing or cutting of the insulating sheath 5, 6.

The cutting edge delimiting this first slot 11; 411 is thus adapted to pierce the insulating sheath 5, 1C of the first electric wire 1 when it is introduced into this first slot 11; 411 so as to come into contact with the conductive core 3; 1B in order to establish an electrical contact between the latter and said electrical connection element. The electrical connection element 10; 410 is thus a so-called insulating sheath piercing element.

This is more particularly represented on the figures 5 to 7 and 30 to 32 , in the case of the first and fifth embodiments. However, the insertion of the electric wires is similar in the other embodiments.

Remarkably, said two edges 11A, 11B; 111A, 111B; 211A, 211B; 311A, 311B; 411A, 411B facing each other which delimit the first slot 11; 111; 211; 311; 411 of the electrical connection element 10; 110; 210; 310; 410 belong respectively to two parts 30, 40; 130, 140; 230, 240; 330, 340; 430, 440 separate from the electrical connection element 10; 110; 210; 310, 410 made from two materials having different electrical conductivities.

Preferably, one 30; 130; 230; 330; 430 of these two parts 30, 40; 130, 140; 230, 240; 330, 340; 430, 440 of the electrical connection element 10; 110; 210; 310; 410 is made of a material exhibiting high electrical conductivity, while the other 40; 140; 240; 340; 440 of these two parts 30, 40; 130, 140; 230, 240; 330, 340; 430, 440 is made of a material exhibiting low electrical conductivity.

For example, part 30; 130; 230; 330; 430 having the highest electrical conductivity, is made of copper or an alloy containing copper, preferably brass, while the other part 40; 140; 240; 340; 440 is made of stainless steel, steel or any other metal alloy having sufficient flexibility.

It is thus possible to optimize the electrical performance of the material chosen having the greatest electrical conductivity, so as to ensure satisfactory conduction of electricity between each electrical wire 1, 2; 1A, 2A, 3A introduced into the electrical connection element 10; 110; 210; 310; 410 and the latter at lower cost because the volume of this material used is limited.

In addition, as will be explained later, it is possible to optimize the mechanical performance of the material having the lowest electrical conductivity, so as to facilitate the introduction of each electrical wire 1, 2; 1A, 2A, 3A in the electrical connection element 10; 110; 210; 310; 410 and to ensure good contact between this electric wire 1, 2; 1A, 2A, 3A and the part of the electrical connection element 10; 110; 210; 310; 410 produced in the material having the greatest electrical conductivity.

Advantageously, the edge 11A; 111A; 211A; 311A; 411A ( figures 1, 2 , 12 , 22 , 27 at 29 ) cutting which delimits the slot 11; 111; 211; 311; 411 belongs to that 30; 130; 230; 330; 430 of the two distinct parts of the electrical connection element which is made of the material having the greatest electrical conductivity. This makes it possible to establish electrical contact satisfactory between the electrical connection element and the conductive core of the electrical wire.

As explained in more detail later, the cutting edge 11A; 111A; 211A; 311A; 411A of the first slot 11; 111; 211; 311; 411 cuts the insulating sheath 5, 1C of the electric wire 1; 1A when the latter is introduced into this first slot 11; 111; 211; 311; 411.

According to the different embodiments shown here, the electrical connection element 10; 110; 210; 310; 410 has two slots 11, 21; 111, 121; 211, 221; 311, 321; 411, 421 distinct each intended to accommodate an electric wire 1, 2; 1A, 2A, 3A, one of the electric wires 1, 2; 1A, 2A, 3A coming directly from the network and the other being intended to establish the connection of said electrical connection element with another electrical connection element.

This connection element 10; 110; 210; 310; 410 then advantageously constitutes an electrical transplanting terminal making it possible to establish an electrical connection between two electrical wires 1, 2; 1A, 2A, 3A ( figures 4 to 11 and 30 to 32). By virtue of such a terminal, two electrical devices can be connected in series to the electrical network.

The second slot 21; 121; 221; 321; 421 is identical to the first slot 11; 111; 211; 311; 411 in the sense that it is delimited by two other edges 21A, 21B; 121A, 121B; 221A, 221B; 321A, 321B; 421A, 421B facing the electrical connection element 10; 110; 210; 310; 410 one of which is a sharp edge.

The first and second slots 11, 21; 111, 121; 211, 221; 311, 321; 411, 421 are distinct in that they can each be deformed without the other deforming. At least one of the edges 11B; 111B; 211B; 311B; 411B of the first slot 11 is adapted to move independently of the edges 21A, 21B; 121A, 121B; 221A, 221B; 321A, 321B; 421A, 421B of the second slot 21; 121; 221; 321; 421. Likewise, at least one of the edges 21B; 121B; 221B; 321B; 421B of the second slot 21; 121; 221; 321; 421 is adapted to move independently of the edges 11A, 11B; 111A, 111B; 211A, 211B; 311A, 311B; 411A, 411B of the first slot 11; 111; 211; 311; 411.

Among the edges of the first and second slots 11, 21; 111, 121; 211, 221; 311, 321; 411, 421, there are at least two, each belonging to a slot 11, 21; 111, 121; 211, 221; 311, 321; 411, 421 different, which are discontinuous, that is to say, do not extend in the continuity of one another.

More precisely here, said first 11; 111; 211; 311; 411 and second 21; 121; 221; 321; 421 slots are arranged side by side, so as to extend along two longitudinal axes X1, X2; X11, X12; X21, X22; X31, X32; X41, X42 separate. These longitudinal axes X1, X2; X11, X12; X21, X22; X31, X32; X41, X42 are here parallel, as shown in the figures 2 , 16 , 17 , 22 and 28 .

In the case of the first, second and third embodiments, the edges of each slot 11, 21; 111, 121; 211, 221 are mutually parallel and extend along the longitudinal axis X1, X2; X11, X12; X21, X22 of the corresponding slot.

In the case of the fourth and fifth embodiments in which the edges of each slot 311, 321; 411, 421 form a slight angle between them, the longitudinal axes X31, X32; X41, X42 of the two slots 311, 321; 411, 421 are parallel to this angle.

Concretely, the electrical connection element 10; 110; 210; 310; 410 is formed by assembling said two parts 30, 40; 130, 140; 230, 240; 330, 340; 430, 440 distinct.

It comprises a central part 30; 130; 230; 330; 430 and a peripheral part 40; 140; 240; 340; 440 which frames the central part 30; 130; 230; 330: 430.

Said first 11; 111; 211; 311; 411 and second 21; 121; 221; 321; 421 slots are respectively delimited between two edges 11A, 21A; 111A, 121A; 211A, 221A; 311A, 321A; 411A, 421A opposite of this central part 30; 130; 230; 330; 430 and two edges 11B, 21B; 111B, 121B; 211B, 221B; 311B, 321B; 411B, 421B opposite this peripheral part 40; 140; 240; 340; 440.

The different embodiments shown in the figures are distinguished by the shape and the relative arrangement of the central and peripheral parts of the connection element.

Whatever the embodiment considered, the central part 30; 130; 230; 330; 430 is in the form of a tab 30A; 130A; 230A; 330A; 430A with an elongated shape. This tab 30A; 130A; 230A; 330A; 430A, and therefore the central part 30; 130; 230; 330; 430 have a support branch 31; 131; 231; 331; 431 and a functional branch 32; 132; 232; 332; 432.

The functional branch 32; 132; 232; 332; 432 has longitudinal edges which constitute said opposite edges of said central portion 30; 130; 230; 330; 430 of the electrical connection element 10; 110; 210; 310; 410 which respectively form one 11A; 111A; 211A; 311A; 411A of edges 11A, 11B; 111A, 111B; 211A, 211B; 311A, 311B; 411A, 411B of the first slot 11; 111; 211; 311; 411 and one 21A; 121A; 221A; 321A; 421A of edges 21A, 21B; 121A, 121B; 221A, 221B; 321A, 321B; 421A, 421B of the second slot 21; 121; 221; 321; 421.

These edges 11A, 21A; 111A, 121A; 211A, 221A; 311A, 321A; 411A, 421A of the central part 30; 130; 230; 330; 430 are exclusively carried by the functional branch 32; 132; 232; 332; 432. The edges of the support branch 31; 131; 231; 331; 431 do not participate in the delimitation of the slots of the connection element.

In the first, second and fifth embodiments shown in figures 1 to 16 and 27 to 32 , the tab 30A; 130A; 430A is bent in the shape of an L, the branches of this L defining the support branch 31; 131; 431 and the functional branch 32; 132; 432.

In the third embodiment, shown in figures 17 to 21 , the functional branch 232 of the tongue 230A is formed by the folding back at an acute angle of one of the ends of this tongue 230A. It is similar to the functional branch of the first and second embodiments.

The support branch 231 here has a more complex shape. It comprises a flat part 231A adjacent to the functional branch 232 and a curved part 231B whose free end 231C passes through a window 234 of the flat part 231A (see figure 18 ).

This particular shape makes it possible to define, at the level of the window 234 of the tongue 230A, a receptacle for receiving an electrical connection pin (not shown) of an electrical device ( figures 19 and 20 ). This is a connection pin of rectangular or circular section. The curved portion 231B of the tongue 230A establishes electrical contact between the receptacle for receiving the electrical connection element 210 and this connection pin.

In the fourth embodiment, shown in figures 22 to 26 , the functional branch 332 is formed by the folding at a right angle of one of the ends of the tongue 330A. It is similar to the functional branch of the first, second and third embodiments.

The support branch 331 also has a complex shape. It comprises a base 331A adjacent to the functional branch 332 and a rear part 331B which extends parallel to the functional branch 332, on the same side of the base 331A as this functional branch 332. The free end 331C of the rear part 331B forms a return to the functional branch 332 and extends parallel to the base 331A (see figures 23 and 25 ) of support branch 331.

Whatever the embodiment considered, the two support branches 31; 131; 231; 331; 431 and functional 32; 132; 232; 332; 432 of the central part 30; 130; 230; 330; 430 are connected continuously by an elbow 33; 133; 233; 333; 433 ( figures 1 , 4 , 8 , 12, 14, 16 , 18 , 23 , 26 and 27 ).

The tab 30A; 130A; 230A; 330A; 430A constituting the central part 30; 130; 230; 330; 430 is thick and rigid so that it does not deform easily (at least it does not deform when inserting an electric wire in one of the two slots). This central part 30; 130; 230; 330; 430 is made of the material having the greatest electrical conductivity, preferably brass.

The edge 11A; 111A; 211A; 311A; 411A of the first slot 11; 111; 211; 311; 411 and the edge 21A; 121A; 221A; 321A; 421A of the second slot 21; 121; 221; 321; 421 formed by the longitudinal edges of the functional branch 32; 132; 232; 332; 432 of the central part 30; 130; 230; 330; 430 are sharp here, that is to say adapted to pass through the insulating sheath of the electric wire to establish an electric contact with the conductive core of this electric wire.

As mentioned above, this cutting edge can include cutouts (case of the first and fifth embodiments) and / or be made sharp by a striking method (case of the other embodiments).

In the latter case, the thickness of the cutting edge is for example refined from a thickness between 0.5 and 0.6 millimeter corresponding to the thickness at the center of the tongue 30A; 130A; 230A; 330A; 430A to achieve the thickness of 0.3 millimeter.

Thus, the cutting edge of the tongue has a thickness similar to that of the edge of the slot formed by the peripheral part, as explained below.

The cutting edge can also be sharp because of its low original thickness.

The peripheral part 40; 140; 240; 340; 440 is a leaf spring 40A; 140A; 240A; 340A; 440A generally U-shaped. It comprises a base 41; 141; 241; 341; 441 from which rise two side wings 42; 142; 242; 342; 442 arranged opposite. The side wings 42; 142; 242; 342; 442 frame the functional branch 32; 132; 232; 332; 432 of the central part 30; 130; 230; 330; 430 of the electrical connection element 10; 110; 210; 310; 410 ( figures 1 , 4 and 8 , 12, 17, 22 and 27 especially).

In the first, second, fourth and fifth embodiments, the side wings 42; 142; 342; 442 are connected to the base 41, 141, 341; 441 by elbows adapted to deform elastically to form pivot hinges so that, as will be described in more detail later, the introduction of an electric wire 1, 2; 1A, 2A, 3A in one of the slots 11, 21; 111, 121; 311, 321; 411, 421 of the electrical connection element 10; 110; 310; 410, causes the separation of the side wing 42; 142; 342; 442 corresponding of the functional branch 32; 132; 332; 432 of the central part 30; 130; 330; 430 ( figures 6 , 10 and 30 at 32 ).

The spacing of the side wings 42; 142; 342; 442 is not done in the same way depending on the embodiment considered, as will be described in more detail later.

In the third embodiment of figures 17 to 21 , the base 241 has a curved shape. This base 241 and the side wings 242 are also adapted to deform elastically to allow the introduction of the electric wire 1, 2 into one of the slots 211, 221, as will be described in more detail later.

Whatever the embodiment, each side wing 42; 142; 242; 342; 442 of the leaf spring 40A; 140A; 240A; 340A; 440A has a main part 44; 144; 244; 344; 444 from which extends a post 43; 143; 243; 343; 443 in the direction of functional branch 32; 132; 232; 332; 432 of the central part 30; 130; 230; 330; 430 connection element electric 10; 110; 210; 310; 410.

The amount 43; 143; 243; 343; 443 of each side wing 42; 142; 242; 342; 442 is re-entering in the sense that it forms an elbow from the main part 44; 144; 244; 344; 444, to go to the functional branch 32; 132; 232; 332; 432 of the central part 30; 130; 230; 330; 430 (see in particular figures 3 , 7 , 11 , 12 , 17 , 22 and 27 ).

In the first, second, fourth and fifth embodiments, apart from any deformation due to the insertion of an electric wire in one of the slots of the connection element, the main part 44; 144; 344; 444 of each side wing 42; 142; 342; 442 of the peripheral part 40; 140; 340; 440 of the electrical connection element 10; 110; 310; 410 extends substantially orthogonally to the base 41; 141; 341; 441 of this peripheral part 40; 140; 340; 440 and also substantially orthogonally to the main faces of the functional branch 32; 132; 332; 432 of the central part 30; 130; 330; 430 of the electrical connection element. The main parts 44; 144; 344; 444 of the side wings 42; 142; 342; 442 are parallel.

In the third embodiment of the connection element 210, the main part 244 of each side wing 242 of the peripheral part 240 of the electrical connection element 210 extends substantially orthogonally to the main faces of the functional branch 232 of the central part 230 of the electrical connection element. The main parts 244 of the side wings 242 are parallel.

In the first, second, third and fourth embodiments, apart from the bend formed by each upright, the latter extends perpendicularly to the main part 44; 144; 244; 344 of the side wing 42; 142; 242; 342 corresponding. It thus extends along a mean plane coinciding with the mean plane of the functional branch 32; 132; 232; 332 of the central part 30; 130; 230; 330 of the electrical connection element 10; 110; 210; 310 ( figures 7 , 15 , 19 and 22 ). Each amount 43; 143; 243; 343 is here formed by the folding of a portion of the side wing 42; 142; 242; 342 corresponding.

In the fifth embodiment, the uprights 443 extend at an angle, towards each other and towards the interior of the peripheral part 440.

These amounts 443 are here obtained by making a puncture in the main part 444 of each side wing 442.

The free edge of each of these uprights 43; 143; 243; 343; 443 extends vis-à-vis one of the longitudinal edges of the functional branch 32; 132; 232; 332; 432 of the central part 30; 130; 230; 330; 430 of the electrical connection element 10; 110; 210; 310; 410.

These free edges of the uprights 43; 143; 243; 343; 443 constitute said edges facing the peripheral part 40; 140; 240; 340; 440 of the electrical connection element 10; 110; 210; 310; 410 which respectively form the other edge 11B; 111B; 211B; 311B; 411B of the first slot 11; 111; 211; 311; 411 and the other edge 21B; 121B; 221B; 321B; 421B of the second slot 21; 121; 221; 321; 421.

They are also sharp here.

They have for example cutouts 13, 23; 413, 423, as in the first and fifth embodiments, and / or a very thin thickness giving them a sharp character. This thickness may for example be the initial thickness of the stainless steel sheet used to manufacture the leaf spring. This thickness is for example about 0.4 millimeter.

Thus, they delimit, with said opposite longitudinal edges of the functional branch 32; 132; 232; 332; 432 of the central part 30; 130; 230; 330; 430 of the electrical connection element 10; 110; 210; 310; 410, the first 11; 111; 211; 311; 411 and second 21; 121; 221; 321; 421 slots for introducing this electrical connection element 10; 110; 210; 310; 410.

Each first and second slot 11, 21; 111, 121; 211, 221; 311, 321; 411, 421 opens out on one side into a mouth 11C, 21C; 111C, 121C; 211C, 221C; 311C, 321C; 411C, 421C access for the electric wire 1, 2 (see in particular figures 1, 2 , 4, 5 , 6 , 8, 9, 10 , 13, 14 , 17, 18 , 22, 24 and 28 ).

More precisely, here, the first and second slots 11, 21; 111, 121; 211, 221; 311, 321; 411, 421 each have a mouth 11C, 21C; 111C, 121C; 211C, 221C; 311C, 321C; 411C, 421C in V-shaped profile, extended by an interior part 14, 24; 114, 124; 214, 224; 314, 324; 414, 424 ( figures 1, 2 , 4 , 8 , 16 , 17 , 26 and 28 ) along which the edges 11A, 11B, 21A, 21B; 111A, 111B, 121A, 121B; 211A, 211B, 221A, 221B of the slot 11, 21; 111, 121; 211, 221 are parallel (first, second and third embodiments), or along which the edges 311A, 311B, 321A, 321B of each slot 311, 321 form an angle between them such that the width of the corresponding slot decreases in the direction of insertion of the electric wire (fourth embodiment, see figure 26 ) or along which the edges 411A, 411B, 421A, 421B of each slot 411, 421 form between them an angle such that the width of the corresponding slot increases in the direction of insertion of the electric wire (fifth embodiment, see figure 28 ).

The edges of the slots of the connection element are considered here in their position at rest, that is to say in the absence of any electric wire inserted in these slots.

In the first and fifth embodiments of the electrical connection element, at the junction between the mouth 11C, 21C; 411C, 421C and the inner part 14, 24; 414, 424 of each slot 11, 21; 411, 421, edges 11A, 11B, 21A, 21B; 411A, 411B, 421A, 421B of each slot 11, 21; 411, 421 are provided with cutouts 13, 23; 413, 423 ( figures 1 and 2 ) facilitating the piercing of the electric wire when it is introduced into the corresponding slot.

In the other embodiments, the cutting edges 111A, 111B, 121A, 121B; 211A, 211B, 221A, 221B; 311A, 311B, 321A, 321B of the slots 111, 121; 211, 221; 311, 321 has a reduction in their thickness over all or part of their length, so as to facilitate the drilling of the electric wires.

As a variant, it is conceivable that the edges of each slot each have a cutting area and a non-cutting area.

For example, the edge of the mouth of each slot located on the central part of the connection element is sharp, for example with cutouts, and the edge of the inner part of the slot located on the central part is not sharp. not sharp.

On the other hand, the edge of the mouth of each slot located on the peripheral part of the connection element is not sharp and the edge of the inner part of the slot located on the peripheral part is sharp.

In this way, when the electric wire is introduced into the mouth of the slot, the peripheral part of the connection element pushes the electric wire against the cutting central part, then, when the electric wire is introduced into the inner part of the slit is the central part which pushes the electric wire against the cutting peripheral part.

Thus, the two parts, central and peripheral, cross in turn the insulating sheath of the electric wire to come into contact with the conductive core of the electric wire. The electrical contact is then established in a particularly reliable manner.

Whatever the embodiment of the electrical connection element envisaged, from a mechanical point of view, the central part 30; 130; 230; 330; 430 has a much greater rigidity than the peripheral part 40; 140; 240; 340; 440 of the electrical connection element 10; 110; 210; 310; 410. The peripheral part 40; 140; 240; 340; 440 of the electrical connection element 10; 110; 210; 310; 410 is adapted to deform during the introduction of the electric wires 1, 2; 1A, 2A, 3A in the first and second slots 11, 21; 111, 121; 211, 221; 311, 321; 411, 421 while the central part 30; 130; 230; 330; 430 does not deform.

In general, the central part 30; 130; 230; 330; 430 is secured to the peripheral part 40; 140; 240; 340; 440.

More precisely, said tongue 30A; 130A; 230A; 330A; 430A is secured to said leaf spring 40A; 140A; 240A; 340A; 440A exclusively at the level of the support branch 31; 131; 231; 331; 431 of the tab.

In the first, fourth and fifth embodiments, the central part 30; 330; 430 of the electrical connection element 10; 310; 410 is secured to the base 41, 341; 441 of the peripheral part 40; 340; 440 exclusively at the level of the support branch 31; 331; 431 of this central part 30; 330; 430. The side wings 42; 342 442 of the peripheral part 40; 340; 440 are each adapted to pivot about a pivot axis P1, P2; P31, P32; P41, P42 orthogonal or substantially orthogonal to the longitudinal axis X1, X2; X31, X32; X41, X42 of the slot 11, 21; 311, 321; 411, 421 matching ( figures 1 , 22 and 28 ).

More precisely, in the first and the fifth embodiments, the support branch 31; 431 of the central part 30 is in contact with the base 41; 441 of the peripheral part 40; 440. The functional branch 32; 432 of the central part 30; 430 then rises from this base 41; 441 of the peripheral part 40; 440, on the same side of this base 41; 441 as the side wings 42; 442 of the peripheral part 40; 440. The base 41; 441 of the peripheral part 40; 440 is near elbow 33; 433 connecting the functional branch 32; 432 to the support branch 31; 431.

In the fourth embodiment, the situation is different, because the orientation of the U-shaped peripheral part 340 with respect to the functional branch 332 of the central part 330 is reversed.

Here, it is the free end 331C of the rear part 331B of the support branch 331 of the central part 330 which is in contact with the base 341 of the peripheral part 340. In this case, the base 341 of the part peripheral 340 extends near the free end of the functional branch 332 of the central part 330. The base 341 does not however cover the free end of the functional branch 332. On the contrary, it extends back from this free end, so as to leave free access to the slots 311, 321.

The joining of the central and peripheral parts is here achieved by means of a link preventing any relative movement of the central part 30; 330; 430 and the peripheral part 40; 340; 440. This may for example be a fixing by embedding, clinching, jogging, welding or riveting.

Thus, advantageously, the side wings 42; 342; 442 of the peripheral part 40; 340; 440 of the electrical connection element 10; 310; 410 are mechanically independent of the functional branch 32; 332; 432 of the central part 30; 330; 430.

They are each adapted to pivot about the pivot axis P1, P2; P31, P32; P41, P42 orthogonal to the longitudinal axis X1, X2; X31, X32; X41, X 42 of the slot 11, 21; 311, 321; 411, 421 corresponding, thanks to the elbow connecting this side wing to the base of the peripheral part.

In the case of the fourth and fifth embodiments, the pivot axis P31, P32; P41, P42 is orthogonal to the longitudinal axis X31; X32; X41, X42 of the corresponding slot, at the exact angle existing between the edges of this slot.

Accordingly, when an electric wire 1 is introduced into the first slot 11; 311; 411 ( figures 4 to 7 ), only the edge 11B, 311B; 411B of this first slot 11; 311; 411 belonging to the peripheral part 40; 340; 440 of the electrical connection element 10; 310; 410 moves so as to allow the insertion of the electric wire (the other edge 11A; 311A; 411A belonging to the central part 30; 330; 430 does not move).

In doing so, the first slot 11; 311; 411 of corresponding introduction opens, without affecting the opening of the second slot 21; 321; 421 who remains in its initial state. This is particularly visible on the figure 6 for the first embodiment and on the figure 30 for the fifth embodiment.

In the first embodiment, the electric wire 1, 2 is introduced at the mouth 11C, 21C of one of the slots 11, 21 which is located as close as possible to the free end of the lateral wings 42 of the peripheral part. 40. This free end of the side wings 42 being located as far as possible from the elbow connecting the side wing 42 and the base 41 of the peripheral part 40, the electric wire 1, 2 is introduced on the side of the slot 11, 21 where the side wing 42 is the easiest to move away from the central part 30. The insertion of the electric wire is facilitated.

In this configuration, the more the electric wire 1, 2 is pushed into the slot of the connection element, the greater the stress exerted by the edges of the slot on the electric wire, because the edges of each slot are here parallel.

In order to prevent the deformation of the side wings 442 of the connection element 410 from becoming plastic and therefore irreversible, which may be the case during the insertion of an electric wire of large diameter, it is provided in the fifth embodiment that the edges of each slit 411, 421 are not parallel, but inclined towards each other so that they are closest at the level of the mouth 411C, 421C of each slit, and move away from each other in the direction of insertion of the electric wire in the slot 411, 421.

Thus, the stress exerted by the edges of the slot 411, 421 on the electric wire 1A, 2A, 3A, and vice versa, the stress exerted by the electric wire 1A, 2A, 3A on the edges of the slot 411; 421 is limited when the electric wire is inserted into the slot, even for an electric wire of large diameter, for example of diameter greater than 2.5 millimeters.

In the fourth embodiment, on the contrary, the electric wire 1, 2 is introduced at the mouth 311C, 321C of one of the slots 311, 321 which is located at the furthest from the free end of the side wings 342 of the peripheral part 340, that is to say the closest to the elbow connecting the side wing 342 and the base 341 of the peripheral part 340. The electric wire 1, 2 is therefore introduced on the side of the slot 311, 321 where the side flange 342 is the most difficult to move away from the central part 330. The piercing, or the tearing of the insulating sheath of the electric wire is thus facilitated. Furthermore, the edges of the slot 311, 321 here form a slight angle between them, so that the inner part 314, 324 of the slot 311, 321 is slightly wider at the junction with the mouth 311C, 321C of the slot. The insertion of the electric wire is thus facilitated.

When introducing a second electric wire 2 into the second slot 21; 321; 421, only the edge 21B; 321B; 421B of this second slot 21; 321; 421 belonging to the peripheral part 40; 340; 440 of the electrical connection element 10; 310; 410 moves so as to allow the insertion of the electric wire (the other edge 21A; 321A; 421A belonging to the central part 30; 330; 430 does not move). In doing so, the second slot 21; 321; 421 corresponding opens, without affecting the opening of the first slot 11; 311; 411. The connection established between the electric wire 1; 1A and the electrical connection element by inserting the latter into the first slot 11; 311 is thus not disturbed. This is particularly visible on figures 10 , 31 and 32 .

In the second and third embodiments, the central part 130; 230 of the electrical connection element 110; 210 is not secured to the base 141; 241 of the peripheral part 140; 240. The side wings 142, 242 of the peripheral part 140; 240 are each adapted to pivot about a pivot axis P11, P12; P21, P22 parallel to the longitudinal axis X11, X12; X21, X22 of slot 111, 121; 211, 221 corresponding.

In this configuration, the stress exerted by the edges of the slot on the electric wire does not depend on the insertion distance of the electric wire along the slot. This stress remains constant regardless of the position of the electric wire in the slot of the connection element.

More precisely, in the second embodiment of the connection element 110 according to the invention, the peripheral part 140 comprises an additional wall 150 ( figures 14, 15 ), which extends from the base 141, perpendicular to the latter, between the two side wings 142. This additional wall 150 is separate from the side wings 142 and is only connected to the latter via the intermediary of the base 141. It also extends perpendicular to the side wings 142.

Here, the central part 130 of the electrical connection element 110 is made integral with the additional wall 150 exclusively at the level of the support branch of this central part 130.

More precisely, the support branch 131 of the central part 130 is in contact with the additional wall 150 of the peripheral part 140. Here, the functional branch 132 of the central part 130 then rises from this additional wall 150 of the part. peripheral 140, on the side of the lateral wings 142 of the peripheral part.

The central and peripheral parts are also joined together by means of a connection preventing any relative movement of the central part 130 and the peripheral part 140. This can be, for example, a fixing by embedding, clinching, jogging, welding, or riveting.

Thus, advantageously, the side wings 142 of the peripheral part 140 of the electrical connection element 110 are mechanically independent of the functional branch 132 of the central part 130. They are each adapted to pivot about the pivot axis P11, P12 parallel to the longitudinal axis X11, X12 of the corresponding slot 111, 121, thanks to the elbow connecting this side wing 142 to the base 141 of the peripheral part 140.

Finally, in the third embodiment, the central part 230 of the electrical connection element 210 is made integral with the side walls 242 of the peripheral part 240 exclusively at the level of the support branch of this central part 230.

More precisely, here the tongue 230A forming the central part 230 comprises, along the longitudinal edges of the flat part 231A of the support branch 231, two flanges 235 which run along, without touching them, the lateral wings 242 of the peripheral part 240 The end of this rim 235 closest to the base 241 of the peripheral part 240 comprises a tab 236 ( figures 17, 18 ) which comes to rest against the adjacent side wing 242 of the peripheral part 240 and is provided with means of cooperation with an opening 246 of this adjacent side wing 242 to secure the central and peripheral parts of the connection element 210.

The support branch 231 of the central part 230 is therefore here in contact with the side wings 242 at the level of the tabs 236.

Advantageously, as in the other embodiments, the side wings 242 of the peripheral part 240 of the electrical connection element 210 are mechanically independent of the functional branch 232 of the central part 230. They are each adapted to pivot around it. a pivot pin P21, P22 ( figures 17 , 22 ) parallel to the longitudinal axis X21, X22 of the corresponding slot 211, 221, thanks to the cooperation of the tab 236 of the central part 230 and the opening 246 of the peripheral part 240.

Accordingly, in the second and third embodiments, when an electric wire 1 is introduced into the first slot 111; 211, only the edge 111B; 211B of this first slot 111; 211 belonging to the peripheral part 140; 240 of the electrical connection element 110; 210 moves so as to allow the insertion of the electric wire (the other edge 111A; 211A belonging to the central part 130; 230 does not move). In doing so, the first slot 111; 211 of corresponding introduction opens, without affecting the opening of the second slot 121; 221 which remains in its initial position.

When introducing a second electric wire 2 into the second slot 121; 221, only edge 121B; 221B of this second slot 121; 221 belonging to the peripheral part 140; 240 of the electrical connection element 110; 210 moves so as to allow the insertion of the electric wire (the other edge 121A; 221A belonging to the central part 130; 230 does not move). In doing so, the second slot 121; 221 corresponding opens, without affecting the opening of the first slot 111, 121. The connection established between the electric wire 1 and the connection element 110; 210 electric by inserting it into the first slot 111; 211 is thus not disturbed.

Whatever the embodiment of the connection element according to the invention, it is therefore possible to connect the two electric wires 1, 2 successively, without the connection of the second wire disturbing the connection of the first wire, like the show them figures 6 and 10 for the first embodiment.

This is also made possible by means of stiffening the connection element 10; 110; 210; 310; 410. These stiffening means block the transmission of the deformation from one of the side wings to the other side wing. More precisely, they block the transmission of the separation movement of one of the lateral wings during the opening of one of the slits for the insertion of an electric wire to the other lateral wing delimiting the other slit. .

These means of stiffening the connection element 10; 110; 210; 310; 410 include internal abutment elements against which said side wings 42; 142; 242; 342; 442 come to support when they are deformed towards the inside of the connection element.

More specifically, here, in the first, second, fourth and fifth embodiments, the tab 30A; 330A; 430A which forms the central part 30; 130; 330; 430 has side projections 35; 135; 335; 435 ( figures 1 and 2 ) which form said internal stop members for the side wings 42; 142; 342; 442 of the peripheral part 40; 140; 340; 440.

In the absence of an electric wire introduced into the electrical connection element 10; 110; 310; 410, the side wings 42; 142; 342; 442 of the peripheral part 40; 140; 340; 440 thus remain in abutment against the lateral projections 35, 135, 335; 435 of the central part 30; 130; 330; 430.

In addition, particularly advantageously, the side projections 35; 135; 335; 435 stiffen the whole of the electrical connection element, in particular during the insertion of an electrical wire in only one of the two slots 11, 21; 111, 121; 211, 221; 311, 321; 411, 421.

In the first, second, fourth and fifth embodiments of the connection element 10; 110; 310; 410, the side projections 35; 135; 335; 435 in fact oppose the deformation of the side wing 42; 142; 342; 442 adjacent to the slot in which no electric wire is introduced.

When the electric wire 1; 1A ( figures 6 and 30 ) is for example introduced into the first slot 11; 111; 311; 411 of the connection element 10; 110; 310; 410 while no electric wire is introduced into the second slot 21; 121; 321; 421, the side wing 42; 142; 342; 442 adjacent to the first slot 11; 111; 311; 411 is deformed to allow the passage of the electric wire 1; 1A, and departs from the functional branch 32; 132; 332; 432 of the central part 30; 130; 330; 430 of the connection element.

This side wing 42; 142; 342; 442 adjacent to the first slot 11; 111; 311; 411 is connected to the other side wing adjacent to the second slot 21; 121; 321; 421 by the base 41; 141; 341; 441 of the peripheral part 40; 140; 340; 440. Thus, the deformation of the side wing 42; 142; 342; 442 adjacent to the first slot 11; 111; 311; 411 could, in the absence of side projections 35; 135; 335; 435, cause the deformation of the other side wing 42; 142; 342; 442 adjacent to the second slot 21; 121; 321; 421 towards the inside of the connection element.

The other side wing 42; 142; 342; 442 adjacent to the second slot 21; 121; 321; 421 would then tend to approach the functional branch 32; 132; 332; 432 of the central part 30; 130; 330; 430 of the connection element. Here, the side projections 35, 135, 335, 435 of the central part prevent this deformation of the other side wing 42; 142; 342; 442 adjacent to the second slot 21; 121; 321; 421 in the case described here.

They also prevent the deformation of the first side wing in the event that the electric wire is only introduced into the second slot.

In the third embodiment, the curved part 231B of the support branch 231 of the tongue 230A in fact forms such internal stop elements.

In this third embodiment, the stiffening of the connection element 210 is further improved by the use of tabs 236 which limit the movement of each side wing 242 of the peripheral part 240 towards the outside of the element. connection 210.

These tabs 236 thus form external stop elements limiting the deformation of each lateral wing 242 of the peripheral part 240 towards the outside.

As a variant, the leaf spring forming the peripheral part can also be prestressed so that the lateral wings enclose the lateral projections of the tongue.

On the example of the first embodiment shown in figure 10 , the two electric wires 1, 2 used are identical. As a variant, however, the two electrical wires introduced into the first and second slots of the electrical connection element may have different sections. In addition, they can be made of different materials and / or have different stiffness or flexibility characteristics.

This is particularly shown in the case of the fifth embodiment, on the figure 32 .

The geometry of the connection element 410 according to the fifth embodiment, in which the edges of each slot are inclined towards each other so as to come close to the mouth 411C, 421C of each slot 411 , 421 is particularly advantageous for accommodating electric wires 1A, 3A of different diameters, because this insertion is then possible without deforming the side wings 442 irreversibly. Electric wires of different diameters are in fact inserted more or less far from the mouth 411C, 421C, in the corresponding slot.

In practice, during the implementation of the electrical connection element 10; 110; 210; 310; 410, the user introduces the first electric wire 1; 1A in the first slot 11; 111; 211; 311; 411.

During this insertion movement, the electric wire 1; 1A extends perpendicular to the longitudinal axis X1; X11; X21; X31; X 41, X42 of slot 11; 111; 211; 311; 411, and parallel to the side wings 42; 142; 242; 342; 442 of the peripheral part of the connection element. This electric wire is moved in translation in the corresponding slot while keeping this orientation.

During this insertion movement, the insulating sheath 5; 1C of this first electric wire 1; 1A comes into contact with the edges 11A, 11B; 111A, 111B; 211A, 211B; 311A, 311B; 411A, 411B of the first slot 11; 111; 211; 311; 411 at the mouth 11C; 111C; 211C; 311C; 411C of the first slot 11; 111; 211; 311; 411.

In the first and fifth embodiments, the cutouts 13; 413 present on the edges 11A, 11B; 411A, 411B of the first slot 11; 411 pierce the insulating sheath until the edges 11A, 11B; 411A, 411B of the first slot 11; 411 come into contact with the conductive core 3; 1B of the first electric wire 1; 1A.

In the other embodiments, the thin thickness of the edges of the slot is sufficient to cut the insulating sheath of the electric wire.

The conductive core 3, 1B of the electric wire 1; 1A exhibiting significant hardness, when the edge 11B; 111B; 211B; 311B; 411B of the slot 11; 111; 211; 311; 411, belonging to amount 43; 143; 243; 343; 443 of the side wing 42; 142; 242; 342; 442 of the peripheral part 40; 140; 240; 340; 440, comes into contact with the conductive core 3, 1B, it causes either the elastic deformation of the elbow connecting this side wing 42; 142; 342; 442 at base 41; 141; 341; 441 of the peripheral part 40; 140; 340; 440 (first, second, fourth and fifth embodiments) is the deformation of the side wing 242 itself (third embodiment), so that said side wing 42; 142; 242; 342; 442 moves away from the central part 30; 130; 230; 330; 430 to allow the conductive core 3; 1B of electric wire 1; 1A to be routed in the interior part 14; 114; 214; 314; 414 of the first slot 11; 111; 211; 311; 411.

Finally, when the user releases the pressure exerted on the electric wire 1 for its introduction, the conductive core 3; 1B thereof is clamped between the edges 11A, 11B; 111A, 111B; 211A, 211B; 311A, 311B; 411A, 411B of the first slot 11; 111; 211; 311; 411 because the edge 11B; 111B; 211B; 311B; 411B belonging to amount 43; 143; 243; 343; 443 of the side wing 42; 142; 242; 342; 442 of the peripheral part 40; 140; 240; 340; 440 tends to return towards the central part 30; 130; 230; 330; 430.

This edge 11B; 111B; 211B; 311B; 411B therefore plates the conductive core 3; 1C of electric wire 1; 1A against the edge 11A; 111A; 211A; 311A; 411A of the first slot 11; 111; 211; 311; 411 belonging to functional branch 32; 132; 232; 332; 432 of the central part 30; 130; 230; 330; 430 of the electrical connection element.

In the second, third and fourth embodiments, the electric wire cannot pass through the connection element 110; 210.

In the second and third embodiments, this is due to the fact that the orientation of the U formed by the leaf spring 140A; 240A positions the base 141; 241 on the path of the electric wire.

More precisely, in the second embodiment, the base 141 of the peripheral part of the connection element forms an obstacle preventing the path of the electric wire in a straight line through the slot and the connection element.

In the third embodiment, the tongue 230A comprises, at the level of the window 234 of the flat part 231A of the support branch 231, along the edge of this window 234 oriented towards the functional branch 232, a wall 238 which s 'extends between the functional branch 232 and the curved portion 231B.

This wall 238 forms a stop for the electric wire and ensures that the latter does not obstruct the receiving cell formed at the level of the window 234.

In the fourth embodiment, it is the rear part 331B of the support branch 331 which extends parallel to the functional branch 332, on the same side of the base 331A as this functional branch 332, and thus forms an obstacle preventing the passage of the electric wire through the connection element when it is inserted into one of the slots of this connection element.

The introduction of the second electric wire 2 is done in a similar manner.

Advantageously according to the invention, only the central part of the element electrical connection is made of a material having high electrical conductivity, which is economical. Further, since the peripheral part of the electrical connection element is made of a material different from that of the central part, it is possible to improve the reliability of the electrical connection element by using, for this peripheral part, a less good conductor material, but having mechanical qualities ensuring effective clamping of the electric wire between the edges of the corresponding slot.

As a further variant, it is possible to envisage different arrangements as regards the geometry of the electrical connection element.

For example, the lateral wings of the peripheral part may not be parallel to each other at rest, that is to say in the absence of an electric wire inserted into the connection element.

Claims (19)

1. An insulation-displacement electrical connection element (10; 110; 210; 310; 410) including a first slot (11; 111; 211; 311; 411) and a second slot (21; 121; 221; 321; 421) for inserting at least one insulated electric wire (1, 2; 1A, 2A, 3A), each slot being defined by two facing edges (11A, 11B, 21A, 21B; 111A, 111B, 121A, 121B; 211A, 211B, 221A, 221B; 311A, 311B, 321A, 321B; 411A, 411B, 421A, 421B) with at least one edge that is sharp, said two edges (11A, 11B; 111A, 111B; 211A, 211B; 311A, 311B; 411A, 411B) of each of the first and second slots belonging respectively to two portions (30, 40; 130, 140; 230, 240; 330, 340; 430, 440) of the electrical connection element (10; 110; 210; 310; 410) comprising a central portion (30; 130; 230; 330; 430) bordered by a peripheral portion (40; 140; 240; 340; 440), the edges defining said first and second slots (11, 21; 111, 121; 211, 221; 311, 321; 411, 421) being formed by two opposite edges of the central portion (30; 130; 230; 330; 430) respectively facing two edges of the peripheral portion (40; 140; 240; 340; 440), said central portion (30; 130; 230; 330; 430) being in the form of a tongue (30A; 130A; 230A; 330A; 430A) and said peripheral portion (40; 140; 240; 340; 440) being in the form of a spring blade (40A; 140A; 240A; 340A; 440A) that is generally U-shaped with a base (41; 141; 241; 341; 441) from which there extend two opposite flanges (42; 142; 242; 342; 442) that border said tongue (30A; 130A; 230A; 330A; 430A), the electrical connection element being characterized in that said two portions (30, 40; 130, 140; 230, 240; 330, 340; 430, 440) are distinct and are made out of two respective materials that present different electrical conductivities.
2. An electrical connection element (10; 110; 210; 310; 410) according to claim 1, wherein said sharp edge forms part of that one of the two distinct portions (30, 40; 130, 140; 230, 240; 330, 340; 430; 440) of the electrical connection element (10; 110; 210; 310; 410) that is made out of the material that presents the greater electrical conductivity.
3. An electrical connection element (10; 110; 210; 310; 410) according to claim 1 or claim 2, wherein said first and second slots (11, 21; 111, 121; 211, 221; 311, 321; 411, 421) are arranged side-by-side, in such a manner as to extend along two distinct longitudinal axes (X1, X2; X11, X12; X21, X22; X31, X32; X41, X42) .
4. An electrical connection element (10; 110; 210; 310; 410) according to any one of claims 1 to 3, wherein the central portion (30; 130; 230; 330; 430) is made out of a material that presents electrical conductivity that is greater than the electrical conductivity of the material out of which the peripheral portion (40; 140; 240; 340; 440) is made.
5. An electrical connection element (10; 110; 210; 310; 410) according to any one of claims 1 to 4, wherein each flange (42; 142; 242; 342; 442) of the peripheral portion (40; 140; 240; 340; 440) includes a post (43; 143; 243; 343; 443) that projects towards the tongue (30A; 130A; 230A; 330A; 430A), the free flanks of each of the posts (43; 143; 243; 343; 443) forming the facing edges of said peripheral portion (40; 140; 240; 340; 440) of the electrical connection element (10; 110; 210; 310; 410), and wherein the tongue (30A; 130A; 230A; 330A; 430A) includes two longitudinal edges that form said opposite edges of the central portion (30; 130; 230; 330; 430).
6. An electrical connection element (10; 110; 210; 310; 410) according to any one of claims 1 to 5, wherein said tongue (30A; 130A; 230A; 330A; 430A) comprises a functional branch (32; 132; 232; 332; 432) and a support branch (31; 131; 231; 331; 431), said functional branch (32; 132; 232; 332; 432) including said two longitudinal edges that form said opposite edges of the central portion (30; 130; 230; 330; 430), and wherein said tongue (30A; 130A; 230A; 330A; 430A) is secured to said spring blade (40A; 140A; 240A; 340A; 440A) exclusively via the support branch (31; 131; 231; 331; 431) of the tongue.
7. An electrical connection element (10; 310) according to claim 6, wherein said support branch (31; 331; 431) of the tongue (30A; 330A; 430A) is applied against the base (41; 341; 441) of said spring blade (40A; 340A; 440A) in order to secure said support branch (31; 331; 431) to the spring blade.
8. An electrical connection element (110) according to claim 6, wherein said support branch (131) of the tongue (130A) is applied against an additional wall (150) of said spring blade (140A) in order to secure said support branch (131) to the spring blade, which additional wall extends from the base (141) of the spring blade (140A) between the two flanges (142).
9. An electrical connection element (210) according to claim 6, wherein said support branch (231) of the tongue (230A) includes two tabs (236) that are adapted for retaining co-operation with two openings (246) in the flanges (242) of the spring blade (240A) in order to secure said support branch (231) to the spring blade.
10. An electrical connection element (10; 310; 410) according to any one of claims 1 to 9, wherein each of the flanges (42; 342; 442) of the peripheral portion (40; 340; 440) is adapted to pivot about a pivot axis (P1, P2; P31, P32; P41, P42) that is orthogonal or substantially orthogonal to a longitudinal axis (X1, X2; X31, X32; X41, X42) of the corresponding slot (11, 21; 311, 321; 411, 421) .
11. An electrical connection element (110; 210) according to any one of claims 1 to 9, wherein each of the flanges (142; 242) of the peripheral portion (140; 240) is adapted to pivot about a pivot axis (P11, P12; P21, P22) that is parallel or substantially parallel to the longitudinal axis (X11, X12; X21, X22) of the corresponding slot (111, 121; 211, 221).
12. An electrical connection element (10; 110; 210; 310; 410) according to any preceding claim, wherein both facing edges (11A, 11B, 21A, 21B; 111A, 111B, 121A, 121B; 211A, 211B, 221A, 221B; 311A, 311B, 321A, 321B; 411A, 411B, 421A, 421B) of each slot (11, 21; 111, 121; 211, 221; 311, 321; 411, 421) are sharp edges.
13. An electrical connection element (10; 110; 210; 310; 410) according to any preceding claim, wherein one (30; 130; 230; 330; 430) of the two distinct portions of the connection element (10; 110; 210; 310; 410) is made out of an alloy containing copper, while the other (40; 140; 240; 340; 440) of the two distinct portions is made out of stainless steel or out of steel.
14. An electrical connection element (10; 110; 210; 310; 410) according to any preceding claim, wherein stiffener means are provided for stiffening the connection element (10; 110; 210; 310; 410), which stiffener means block the transmission of the deformation from one of the flanges (42; 142; 242; 342; 442) of the connection element to the other flange (42; 142; 242; 342; 442).
15. An electrical connection element (10; 110; 210; 310; 410) according to the preceding claim, wherein said stiffener means for stiffening the connection element (10; 110; 210; 310; 410) comprise internal abutment elements against which said flanges (42; 142; 242; 342; 442) come to bear when they are deformed towards the inside of the connection element.
16. An electrical connection element (10; 110; 210; 310; 410) according to the preceding claim, wherein said internal abutment elements comprise lateral projections (35; 135; 235; 335; 435) that extend from the central portion (30; 130; 230; 330; 430) of the connection element towards the flanges (42; 142; 242; 342; 442) of the peripheral portion (40; 140; 240; 340; 440).
17. An electrical connection element (210) according to any one of claims 14 to 16, wherein said stiffener means further comprise external abutment elements that limit the deformation of each flange (242) of the peripheral portion (240) towards the outside.
18. An electrical accessory including an electrical connection element (10, 110, 210, 310, 410) according to any preceding claim, forming a connection terminal for connecting it to an electricity network.
19. An electrical accessory according to claim 18, wherein the tongue (230A) of the connection element (210) forming the connection terminal presents a shape that defines a reception socket for receiving an electrical connector pin of another electrical accessory.

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