EP3520177B1 - Electrical connection system comprising an additional leaf spring - Google Patents

Electrical connection system comprising an additional leaf spring Download PDF

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Publication number
EP3520177B1
EP3520177B1 EP16787343.9A EP16787343A EP3520177B1 EP 3520177 B1 EP3520177 B1 EP 3520177B1 EP 16787343 A EP16787343 A EP 16787343A EP 3520177 B1 EP3520177 B1 EP 3520177B1
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EP
European Patent Office
Prior art keywords
electrical connection
connection system
conductive
additional
conductive strip
Prior art date
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Application number
EP16787343.9A
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German (de)
French (fr)
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EP3520177A1 (en
Inventor
Romain Villard
Yannick VILLARDIER
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TE Connectivity Services GmbH
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TE Connectivity Services GmbH
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Publication of EP3520177A1 publication Critical patent/EP3520177A1/en
Application granted granted Critical
Publication of EP3520177B1 publication Critical patent/EP3520177B1/en
Active legal-status Critical Current
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H01R4/48185—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar adapted for axial insertion of a wire end
    • H01R4/48275—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar adapted for axial insertion of a wire end with an opening in the housing for insertion of a release tool
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/4809—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/22—Bases, e.g. strip, block, panel
    • H01R9/24—Terminal blocks
    • H01R9/26—Clip-on terminal blocks for side-by-side rail- or strip-mounting
    • H01R9/2608—Fastening means for mounting on support rail or strip
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/22—Bases, e.g. strip, block, panel
    • H01R9/24—Terminal blocks
    • H01R9/26—Clip-on terminal blocks for side-by-side rail- or strip-mounting
    • H01R9/2691—Clip-on terminal blocks for side-by-side rail- or strip-mounting with ground wire connection to the rail

Definitions

  • the present invention relates to an electrical connection system for an electrical device such as a terminal block, the system comprising an additional leaf spring.
  • junction block comprising an electrical connection system making it possible to electrically connect an electrical conductor and a support rail.
  • This type of terminal block also includes other sockets for connecting electrical conductors with conductive strips included in the body of the block.
  • the number of outlets implies a particular geometry of the terminal block so as not to exceed the template required in an electrical box.
  • the sizing of the electrical connection system can prove to be delicate.
  • the system must include a certain number of parts to ensure good electrical contact between the electrical conductor and the support rail.
  • the present invention aims to resolve all or part of the drawbacks mentioned above.
  • the present invention relates to an electrical connection system as described in claim 1.
  • This arrangement makes it possible to design a simple and reliable electrical connection system. Indeed, the fact of having a single conductive bar electrically connecting the support rail and the electrical conductor allows a good electrical connection while reducing the number of parts of the system to a minimum.
  • Material savings can be achieved as well as the reduction in transformations of the base materials used in the manufacture of the conductive bar, the leaf spring and the additional leaf spring.
  • the clamping device is a device equivalent to the leaf spring, this device being arranged to hold the conductive portion in the position of connection with the conductive bar.
  • the additional leaf spring can be qualified as a leaf spring for retaining the portion of the support rail. In fact in this case, the qualifier “additional” no longer applies to this leaf spring.
  • the clamping device is a screw clamping device.
  • the leaf spring and the additional leaf spring are identical. This arrangement makes it possible to standardize this part, which reduces the number of references and facilitates the management of the parts during the manufacture of the electrical connection system.
  • the conductive bar has a longitudinal contact surface on which the electrical contact location and the cooperation zone are formed.
  • This arrangement makes it possible to produce a conductive bar having a simple geometry, such as a folded longitudinal blade. The manufacture of the conductive bar is thus facilitated.
  • the cooperation zone extends at least partly in the same plane as the extension plane of the electrical contact location.
  • the cooperation zone extends at least partly in a plane transverse to the extension plane of the electrical contact location.
  • This arrangement also allows a simple installation of the connecting bar in the junction block and thus to save space compared to a bar to which are added ancillary devices for connection with the support rail and the electrical conductor.
  • the portion of the support rail and the conductive portion of the electrical conductor can thus be easily arranged close to one another.
  • the electrical contact location extends rectilinearly along a profile generating at least one groove. This arrangement allows better holding in position of the conductive portion.
  • the cooperation zone comprises a first part and a second part, the first part being able to cooperate with a first complementary part of the portion of the support rail extending along a first plane and the second part being able to cooperate with a second complementary part of the portion of the support rail extending along a second plane transverse to the first plane.
  • This cooperation in two transverse parts allows proper positioning of the respective support rail and the electrical connection system in the cooperation position.
  • the support branch extends in a plane transverse to the extension plane of the additional support branch.
  • This arrangement makes it possible to design a junction block in which the direction of insertion of the electrical conductor can be adapted according to the geometric constraints.
  • the conductive bar has a passage opening for the insertion of the conductive portion in the connection position.
  • This arrangement allows the realization of the conductive bar in a single piece having no point of weakness because the current can always be transmitted in sufficient quantity by the two side branches generated by the opening.
  • the conductive bar comprises a first part and a second part, the first part being opposite the second part.
  • This arrangement enables a compact electrical connection system to be produced. This arrangement also makes it possible to adapt the position of the leaf spring and of the additional leaf spring according to the geometric constraints due to the shape of the terminal block.
  • the conductive bar has a general U-shape.
  • This arrangement makes it possible to produce the conductive bar from a rectilinear blade which is then folded. This arrangement allows a saving in material because a base sheet cut into rectilinear blades generates little scrap, that is to say loss of material.
  • the additional support branch extends in the extension of the second part of the conductive bar, the cooperation zone being provided in the first part of the conductive bar.
  • This arrangement makes it possible to produce a clamp for holding the portion of the support rail in position with the cooperation zone and the additional clamping branch.
  • the conductive bar consists of a folded conductive blade.
  • the manufacture of the conductive bar is easy since it is made from a cut sheet which is then folded to give the conductive bar its final shape.
  • the conductive bar consists of a conductive blade.
  • This arrangement facilitates the manufacture of the conductive bar because it comes from a flat blade which is then transformed.
  • the mass production of this single conductive part therefore makes it possible to save production time and reduce conversion costs compared to a system comprising several conductive parts.
  • a saving in material is achieved because a base sheet can generate a large number of blades, material waste being reduced.
  • the conductive blade is included in a rectangular outline.
  • the blade is a rectangle, it is easy to find an arrangement of the cutouts to be made on the base sheet to minimize scrap and produce the most conductive bars.
  • the conductive bar comprises a recess adapted for the force engagement of a fixing part of the support branch and / or comprises an additional recess adapted to the interlocking by force of an additional fixing part of the additional support branch.
  • the depression is achieved by cutting the conductive blade.
  • the depression is thus carried out during the cutting of the conductive blade, which limits the manufacturing time.
  • the cutout creates a through opening in the conductive bar.
  • the present invention also relates to a terminal block comprising an insulating body in which an electrical connection system as described above is provided.
  • the insulating body comprises a support portion of the support branch and / or an additional support portion of the additional support branch.
  • This arrangement makes it possible to ensure the locking of the support branch during the stressing of the clamping branch and the same for the additional support branch and the additional support portion.
  • an electrical device 1 such as a junction block 3 comprises an insulating body 5 and an electrical connection system 7, the electrical connection system 7 being provided in the insulating body 5.
  • the terminal block 3 includes sockets 9 for electrical conductors. Two sockets 9 are connected by a connecting bar 11 to establish electrical contact between two corresponding conductors.
  • the terminal block 3 also has a socket 9 'for an electrical conductor 13 intended to be electrically connected to a support rail 15 on which the terminal block 3 is removably fixed.
  • the electrical conductor 13 has at one end a conductive portion 13 ', for example a metal tip.
  • the metal tip is designed to be inserted into an insertion channel 17 of the socket 9 'where it is held in position by the electrical connection system 7.
  • the socket 9 'further comprises an operating channel 19 into which a user can insert a screwdriver type tool for the removal of the electrical conductor 13.
  • the electrical connection system 7 comprises a conductive bar 21 arranged to transmit a current between the conductive portion 13 'of the electrical conductor 13 and a portion 15' of the support rail 15.
  • the support rail 15 thus has a dual function since it allows the fixing of the junction block 3 and it is also used to be electrically connected to the electrical conductor 16.
  • the electrical connection system 7 also comprises a clamping device 22 of the leaf spring type 23 arranged to hold the conductive portion 13 'in a position of connection with the conductive bar 21 as illustrated in figures 1, 2 , 7, 8 .
  • any other type of clamping device 22 could be used provided that the clamping device 22 is arranged to hold the conductive portion 13 'in a position of connection with the conductive bar 21.
  • a clamping device 22 screw could for example be used.
  • the leaf spring 23 comprises a support branch 23 'arranged to be mounted on the conductive bar 21.
  • the conductive bar 21 has a recess 25 or a through opening resulting from a cutout suitable for force-fitting. of a fixing part 27 of the support branch 23 '.
  • the leaf spring 23 also comprises a clamping branch 23 "joined by an articulation 23 '" to the support branch 23'.
  • the clamping branch 23 is arranged to hold the conductive portion 13 'in the connection position.
  • the operating channel 19 is arranged so as to allow the movement of the clamping branch 23 "for the removal of the electrical conductor 13.
  • the insulating body 5 has a support portion 29 of the support branch 23 'whose function is to block the support branch 23' during the movement of the clamping branch 23 ".
  • the conductive bar 21 has a folded end portion 31 generating a first part 33 ′ of a cooperation zone 35 or cooperation projection 33 and a second part 37 ′ of the cooperation zone 35 or cooperation stop 37.
  • This first part 33 'of the conductive bar 21 is arranged to cooperate with a first complementary part 39 of the support rail 15 extending along a first plane 39'.
  • This second part 37 'of the conductor bar 21 is arranged to cooperate with a second complementary part 41 of the support rail 15 extending along a second plane 41' transverse to the first plane 39 '.
  • the conductive bar 21 also has a longitudinal contact surface 43 on which are formed an electrical contact location 45 with the conductive portion 13 'in the connection position, the cooperation projection 33 and the cooperation stop 37.
  • the electrical contact location 45 extends in a rectilinear manner along a profile generating one or more grooves for better retention of the conductive portion 13 'in the connection position.
  • the conductive bar 21 also has a passage opening 47 for the insertion of the conductive portion 13 'in the connection position. This passage opening 47 results for example from a cut made before folding the conductive bar 21.
  • the electrical connection system 7 also comprises a holding device 49 arranged to hold the support rail 15 in a position of cooperation with the conductive bar 21.
  • the cooperation takes place by contact, which allows current transmission between the conductive bar 21 and the support rail 15.
  • the conductive bar 21 comprises a first part 51 and a second part 53 at least partially opposite the first part 51.
  • the first part 51 comprises the longitudinal contact surface 43 and the second part 53 cooperates with the holding device 49.
  • the fact of having these two parts 51, 53 makes it possible to produce a compact electrical connection system 7 and / or s '' adapt to geometric constraints imposed on the terminal block 3.
  • the conductive bar 21 can thus be obtained by cutting in a base sheet and then by folding.
  • the conductive bar may have a general U-shape.
  • the first part 51 the second part 53 are each formed in a different branch of the U.
  • the general U-shape of the conductive bar 21 is obtained from a conductive blade cut from a base sheet.
  • the blade is included in a rectangular outline, which saves material by limiting scraps during cutting. When cutting, through openings are also created.
  • This arrangement makes it possible to maintain a large section for good current transmission once the conductive strip 21 is folded.
  • the conductive bar 21 once folded also has good strength and does not risk being deformed during assembly in the junction block 3.
  • the retaining device comprises an additional leaf spring 57.
  • This additional leaf spring 57 may be similar to the leaf spring holding the conductive portion 13 'in the connection position.
  • the additional leaf spring 57 comprises an additional support leg 57 'provided with an additional fixing part 60 arranged to be fixed to an additional recess 59 of the conductive bar 21 in a similar manner to the leaf spring 23 of the conductive portion 13 '.
  • the additional leaf spring 57 also comprises an additional clamping branch 57 "arranged to cooperate with the portion 15 'of the support rail 15 in the cooperating position.
  • the additional leaf spring 57 comprises an articulation 57 "'.
  • the additional clamping branch 57" maintains the portion 15' of the support rail 15 in the cooperative position.
  • the electrical connection system 7 obtained therefore comprises few parts, is compact and is able to comply with geometric constraints of lack of space for its integration into the junction block.

Description

La présente invention concerne un système de liaison électrique pour un appareil électrique tel qu'un bloc de jonction, le système comprenant un ressort à lames additionnel.The present invention relates to an electrical connection system for an electrical device such as a terminal block, the system comprising an additional leaf spring.

Il est connu d'utiliser un bloc de jonction comprenant un système de liaison électrique permettant de raccorder électriquement un conducteur électrique et un rail de support.It is known to use a junction block comprising an electrical connection system making it possible to electrically connect an electrical conductor and a support rail.

Ce type de bloc de jonction comprend également d'autres prises de raccordement de conducteurs électriques avec des barrettes conductrices comprises dans le corps du bloc.This type of terminal block also includes other sockets for connecting electrical conductors with conductive strips included in the body of the block.

Le nombre de prises implique une géométrie particulière du bloc de jonction pour ne pas dépasser le gabarit requis dans un coffret électrique. Notamment le dimensionnement du système de liaison électrique peut s'avérer délicat.The number of outlets implies a particular geometry of the terminal block so as not to exceed the template required in an electrical box. In particular, the sizing of the electrical connection system can prove to be delicate.

En effet, le système doit comprendre un certain nombre de pièces pour assurer un bon contact électrique entre le conducteur électrique et le rail de support.Indeed, the system must include a certain number of parts to ensure good electrical contact between the electrical conductor and the support rail.

La présente invention vise à résoudre tout ou partie des inconvénients mentionnés ci-dessus.The present invention aims to resolve all or part of the drawbacks mentioned above.

A cet effet, la présente invention concerne un système de liaison électrique tel que décrit dans la revendication 1.To this end, the present invention relates to an electrical connection system as described in claim 1.

Cette disposition permet de concevoir un système de liaison électrique simple et fiable. En effet, le fait de disposer d'une barrette conductrice unique reliant électriquement le rail de support et le conducteur électrique permet une bonne liaison électrique tout en réduisant le nombre de pièces du système au minimum.This arrangement makes it possible to design a simple and reliable electrical connection system. Indeed, the fact of having a single conductive bar electrically connecting the support rail and the electrical conductor allows a good electrical connection while reducing the number of parts of the system to a minimum.

Des économies de matières peuvent être réalisées ainsi que la diminution des transformations des matériaux de bases utilisés lors de la fabrication de la barrette conductrice, du ressort à lames et du ressort à lames additionnel.Material savings can be achieved as well as the reduction in transformations of the base materials used in the manufacture of the conductive bar, the leaf spring and the additional leaf spring.

Selon un autre aspect de l'invention, le dispositif de serrage est un dispositif équivalent au ressort à lames, ce dispositif étant agencé pour maintenir la portion conductrice en position de liaison avec la barrette conductrice.According to another aspect of the invention, the clamping device is a device equivalent to the leaf spring, this device being arranged to hold the conductive portion in the position of connection with the conductive bar.

Dans ce cas, le ressort à lames additionnel peut être qualifié de ressort à lames de maintien de la portion du rail de support. En effet dans ce cas, le qualificatif « additionnel » ne s'applique plus à ce ressort à lames.In this case, the additional leaf spring can be qualified as a leaf spring for retaining the portion of the support rail. In fact in this case, the qualifier “additional” no longer applies to this leaf spring.

Selon cet autre aspect de l'invention, le dispositif de serrage est un dispositif de serrage à vis.According to this other aspect of the invention, the clamping device is a screw clamping device.

Selon un aspect de l'invention, le ressort à lames et le ressort à lames additionnel sont identiques. Cette disposition permet de standardiser cette pièce, ce qui réduit le nombre de références et facilite la gestion des pièces lors de la fabrication du système de liaison électrique.According to one aspect of the invention, the leaf spring and the additional leaf spring are identical. This arrangement makes it possible to standardize this part, which reduces the number of references and facilitates the management of the parts during the manufacture of the electrical connection system.

Selon un aspect de l'invention, la barrette conductrice présente une surface de contact longitudinale sur laquelle sont ménagés l'emplacement de contact électrique et la zone de coopération.According to one aspect of the invention, the conductive bar has a longitudinal contact surface on which the electrical contact location and the cooperation zone are formed.

Cette disposition permet de réaliser une barrette conductrice présentant une géométrie simple, telle qu'une lame longitudinale pliée. La fabrication de la barrette conductrice en est ainsi facilitée.This arrangement makes it possible to produce a conductive bar having a simple geometry, such as a folded longitudinal blade. The manufacture of the conductive bar is thus facilitated.

Selon un aspect de l'invention, la zone de coopération s'étend au moins en partie dans le même plan que le plan d'extension de l'emplacement de contact électrique.According to one aspect of the invention, the cooperation zone extends at least partly in the same plane as the extension plane of the electrical contact location.

Selon un autre aspect de l'invention, la zone de coopération s'étend au moins en partie dans un plan transversal au plan d'extension de l'emplacement de contact électrique.According to another aspect of the invention, the cooperation zone extends at least partly in a plane transverse to the extension plane of the electrical contact location.

Cette disposition permet également une implantation simple de la barrette de liaison dans le bloc de jonction et ainsi de réaliser un gain de place par rapport à une barrette à laquelle sont ajoutés des dispositifs annexes de raccordement avec le rail de support et le conducteur électrique.This arrangement also allows a simple installation of the connecting bar in the junction block and thus to save space compared to a bar to which are added ancillary devices for connection with the support rail and the electrical conductor.

La portion du rail de support et la portion conductrice du conducteur électrique peuvent ainsi être disposées aisément à proximité l'une de l'autre.The portion of the support rail and the conductive portion of the electrical conductor can thus be easily arranged close to one another.

De préférence, l'emplacement de contact électrique s'étend de manière rectiligne selon un profil engendrant au moins une rainure. Cette disposition permet un meilleur maintien en position de la portion conductrice.Preferably, the electrical contact location extends rectilinearly along a profile generating at least one groove. This arrangement allows better holding in position of the conductive portion.

Selon un aspect de l'invention, la zone de coopération comprend une première partie et une deuxième partie, la première partie étant apte à coopérer avec une première partie complémentaire de la portion du rail de support s'étendant selon un premier plan et la deuxième partie étant apte à coopérer avec une deuxième partie complémentaire de la portion du rail de support s'étendant selon un deuxième plan transversal au premier plan.According to one aspect of the invention, the cooperation zone comprises a first part and a second part, the first part being able to cooperate with a first complementary part of the portion of the support rail extending along a first plane and the second part being able to cooperate with a second complementary part of the portion of the support rail extending along a second plane transverse to the first plane.

Cette coopération selon deux parties transversales permet un bon positionnement respectif du rail de support et du système de liaison électrique en position de coopération.This cooperation in two transverse parts allows proper positioning of the respective support rail and the electrical connection system in the cooperation position.

Le risque de mouvement intempestif en position de coopération et donc d'interruption de contact électrique entre le rail de support et la barrette conductrice est ainsi limité.The risk of unwanted movement in the cooperation position and therefore of interruption of electrical contact between the support rail and the conductive bar is thus limited.

Selon un aspect de l'invention, la branche d'appui s'étend dans un plan transversal au plan d'extension de la branche d'appui additionnelle.According to one aspect of the invention, the support branch extends in a plane transverse to the extension plane of the additional support branch.

Cette disposition permet de concevoir un bloc de jonction dans lequel la direction d'insertion du conducteur électrique peut être adaptée selon les contraintes géométriques.This arrangement makes it possible to design a junction block in which the direction of insertion of the electrical conductor can be adapted according to the geometric constraints.

Selon un aspect de l'invention, la barrette conductrice présente une ouverture de passage pour l'insertion de la portion conductrice en position de liaison.According to one aspect of the invention, the conductive bar has a passage opening for the insertion of the conductive portion in the connection position.

Cette disposition permet la réalisation de la barrette conductrice en une seule pièce ne présentant pas de point de faiblesse car le courant peut toujours être transmis en quantité suffisante par les deux branches latérales engendrées par l'ouverture.This arrangement allows the realization of the conductive bar in a single piece having no point of weakness because the current can always be transmitted in sufficient quantity by the two side branches generated by the opening.

Selon l'invention, la barrette conductrice comprend une première partie et une deuxième partie, la première partie étant en regard de la deuxième partie.According to the invention, the conductive bar comprises a first part and a second part, the first part being opposite the second part.

Cette disposition permet de réaliser un système de liaison électrique compact. Cette disposition permet en outre d'adapter la position du ressort à lames et du ressort à lames additionnel selon les contraintes géométriques dues à la forme du bloc de jonction.This arrangement enables a compact electrical connection system to be produced. This arrangement also makes it possible to adapt the position of the leaf spring and of the additional leaf spring according to the geometric constraints due to the shape of the terminal block.

Selon l'invention, la barrette conductrice présente une forme générale en U.According to the invention, the conductive bar has a general U-shape.

Cette disposition permet de réaliser la barrette conductrice à partir d'une lame rectiligne qui est ensuite pliée. Cette disposition permet une économie de matière car une tôle de base découpée en lames rectilignes engendre peu de chute, c'est-à-dire de perte de matière.This arrangement makes it possible to produce the conductive bar from a rectilinear blade which is then folded. This arrangement allows a saving in material because a base sheet cut into rectilinear blades generates little scrap, that is to say loss of material.

Selon l'invention, la branche d'appui additionnelle s'étend dans le prolongement de la deuxième partie de la barrette conductrice, la zone de coopération étant ménagée dans la première partie de la barrette conductrice.According to the invention, the additional support branch extends in the extension of the second part of the conductive bar, the cooperation zone being provided in the first part of the conductive bar.

Cette disposition permet de réaliser une pince de maintien en position de la portion du rail de support avec la zone de coopération et la branche de serrage additionnelle.This arrangement makes it possible to produce a clamp for holding the portion of the support rail in position with the cooperation zone and the additional clamping branch.

Ainsi la portion du rail de support est maintenue en position de coopération de manière efficace.Thus the portion of the support rail is kept in the cooperative position effectively.

Selon un aspect de l'invention, la barrette conductrice est constituée d'une lame conductrice pliée.According to one aspect of the invention, the conductive bar consists of a folded conductive blade.

La fabrication de la barrette conductrice est aisée puisqu'elle est réalisée à partir d'une tôle découpée qui est ensuite pliée pour conférer à la barrette conductrice sa forme finale.The manufacture of the conductive bar is easy since it is made from a cut sheet which is then folded to give the conductive bar its final shape.

Selon un aspect de l'invention, la barrette conductrice est constituée d'une lame conductrice.According to one aspect of the invention, the conductive bar consists of a conductive blade.

Cette disposition facilite la fabrication de la barrette conductrice car elle provient d'une lame plane qui est ensuite transformée. La fabrication en série de cette pièce conductrice unique permet donc de gagner en temps de production et de réduire les coûts de transformation par rapport à un système comprenant plusieurs pièces conductrices.This arrangement facilitates the manufacture of the conductive bar because it comes from a flat blade which is then transformed. The mass production of this single conductive part therefore makes it possible to save production time and reduce conversion costs compared to a system comprising several conductive parts.

Egalement, une économie de matière est réalisée car une tôle de base peut engendrer un nombre important de lames, les chutes de matière étant réduites.Also, a saving in material is achieved because a base sheet can generate a large number of blades, material waste being reduced.

Selon un aspect de l'invention, la lame conductrice est comprise dans un contour rectangulaire.According to one aspect of the invention, the conductive blade is included in a rectangular outline.

En effet, puisque la lame est un rectangle, il est aisé de trouver une disposition des découpes à réaliser sur la tôle de base pour minimiser les chutes et produire le plus de barrettes conductrices.Indeed, since the blade is a rectangle, it is easy to find an arrangement of the cutouts to be made on the base sheet to minimize scrap and produce the most conductive bars.

Selon un aspect de l'invention, la barrette conductrice comprend un enfoncement adapté pour l'emboitement à force d'une partie de fixation de la branche d'appui et/ou comprend un enfoncement additionnel adapté pour l'emboitement à force d'une partie de fixation additionnelle de la branche d'appui additionnelle.According to one aspect of the invention, the conductive bar comprises a recess adapted for the force engagement of a fixing part of the support branch and / or comprises an additional recess adapted to the interlocking by force of an additional fixing part of the additional support branch.

Cette disposition permet un montage simple et fiable du ressort à lames et/ou du ressort à lames additionnel sur la barrette conductrice. La fabrication du système de liaison électrique en est ainsi simplifiée.This arrangement allows simple and reliable mounting of the leaf spring and / or the additional leaf spring on the conductive bar. The manufacture of the electrical connection system is thus simplified.

Selon un aspect de l'invention, l'enfoncement est réalisé par une découpe de la lame conductrice. L'enfoncement est ainsi réalisé lors de la découpe de la lame conductrice, ce qui limite le temps de fabrication.According to one aspect of the invention, the depression is achieved by cutting the conductive blade. The depression is thus carried out during the cutting of the conductive blade, which limits the manufacturing time.

De préférence, la découpe engendre une ouverture traversante dans la barrette conductrice.Preferably, the cutout creates a through opening in the conductive bar.

La présente invention concerne également un bloc de jonction comprenant un corps isolant dans lequel est ménagé un système de liaison électrique tel que décrit précédemment.The present invention also relates to a terminal block comprising an insulating body in which an electrical connection system as described above is provided.

Selon un aspect de l'invention, le corps isolant comprend une portion de support de la branche d'appui et/ou une portion de support additionnelle de la branche d'appui additionnelle.According to one aspect of the invention, the insulating body comprises a support portion of the support branch and / or an additional support portion of the additional support branch.

Cette disposition permet d'assurer le blocage de la branche d'appui lors de la sollicitation de la branche de serrage et de même pour la branche d'appui additionnelle et la portion de support additionnelle.This arrangement makes it possible to ensure the locking of the support branch during the stressing of the clamping branch and the same for the additional support branch and the additional support portion.

De toute façon l'invention sera bien comprise à l'aide de la description qui suit en référence aux dessins schématiques annexés représentant, à titre d'exemple non limitatif, une forme d'exécution de ce système de liaison électrique.In any event, the invention will be clearly understood with the aid of the description which follows with reference to the appended schematic drawings showing, by way of non-limiting example, an embodiment of this electrical connection system.

Le document US 5 890 916 A décrit un système de connexion électrique pour un appareil électrique tel qu'un bloc de jonction qui présente une zone de coopération agencée pour coopérer avec un segment d'un rail de support, cependant le problème de limiter le matériau nécessaire à la réalisation de la barre conductrice n'est pas abordé.

  • Figure 1 est une vue de face d'un système de liaison électrique, d'un rail de support et d'un conducteur électrique.
  • Figure 2 est une vue en perspective du système de liaison électrique, du rail de support et du conducteur électrique.
  • Figure 3 est un vue de face d'un bloc de jonction comprenant le système de liaison électrique.
  • Figure 4 est une vue de détail de la figure 3 centrée sur le système de liaison électrique.
  • Figure 5 est une vue en perspective du bloc de jonction comprenant le système de liaison électrique.
  • Figure 6 est une vue de détail de la figure 5 centrée sur le système de liaison électrique.
  • Figure 7 est une vue de face du système de liaison électrique et du rail de support.
  • Figure 8 est une vue en perspective du système de liaison électrique.
The document US 5,890,916 A describes an electrical connection system for an electrical device such as a terminal block which has a cooperation zone arranged to cooperate with a segment of a support rail, however the problem of limiting the material necessary for the realization of the bar driver is not discussed.
  • Figure 1 is a front view of an electrical connection system, a support rail and an electrical conductor.
  • Figure 2 is a perspective view of the electrical connection system, the support rail and the electrical conductor.
  • Figure 3 is a front view of a terminal block comprising the electrical connection system.
  • Figure 4 is a detail view of the figure 3 centered on the electrical connection system.
  • Figure 5 is a perspective view of the terminal block comprising the electrical connection system.
  • Figure 6 is a detail view of the figure 5 centered on the electrical connection system.
  • Figure 7 is a front view of the electrical connection system and the support rail.
  • Figure 8 is a perspective view of the electrical connection system.

Comme illustré aux figures 1 à 8, un appareil électrique 1 tel qu'un bloc de jonction 3 comprend un corps isolant 5 et un système de liaison électrique 7, le système de liaison électrique 7 étant ménagé dans le corps isolant 5.As shown in figures 1 to 8 , an electrical device 1 such as a junction block 3 comprises an insulating body 5 and an electrical connection system 7, the electrical connection system 7 being provided in the insulating body 5.

Le bloc de jonction 3 comprend des prises 9 pour des conducteurs électriques. Deux prises 9 sont reliées par une barre de liaison 11 pour établir un contact électrique entre deux conducteurs correspondants.The terminal block 3 includes sockets 9 for electrical conductors. Two sockets 9 are connected by a connecting bar 11 to establish electrical contact between two corresponding conductors.

Le bloc de jonction 3 présente également une prise 9' pour un conducteur électrique 13 destiné à être connecté électriquement à un rail de support 15 sur lequel est fixé de manière amovible le bloc de jonction 3.The terminal block 3 also has a socket 9 'for an electrical conductor 13 intended to be electrically connected to a support rail 15 on which the terminal block 3 is removably fixed.

Cette connexion électrique est établie par le système de liaison électrique 9 comme détaillé ci-après. Le conducteur électrique 13 présente à une extrémité une portion conductrice 13' par exemple un embout métallique.This electrical connection is established by the electrical connection system 9 as detailed below. The electrical conductor 13 has at one end a conductive portion 13 ', for example a metal tip.

L'embout métallique est agencé pour être inséré dans un canal d'insertion 17 de la prise 9' où il est maintenu en position par le système de liaison électrique 7.The metal tip is designed to be inserted into an insertion channel 17 of the socket 9 'where it is held in position by the electrical connection system 7.

La prise 9' comprend en outre un canal de manœuvre 19 dans lequel un utilisateur peut introduire un outil de type tournevis pour le retrait du conducteur électrique 13.The socket 9 'further comprises an operating channel 19 into which a user can insert a screwdriver type tool for the removal of the electrical conductor 13.

Comme illustré aux figures 1 à 8, le système de liaison électrique 7 comprend une barrette conductrice 21 agencée pour transmettre un courant entre la portion conductrice 13' du conducteur électrique 13 et une portion 15' du rail de support 15.As shown in figures 1 to 8 , the electrical connection system 7 comprises a conductive bar 21 arranged to transmit a current between the conductive portion 13 'of the electrical conductor 13 and a portion 15' of the support rail 15.

Le rail de support 15 a ainsi une double fonction puisqu'il permet la fixation du bloc de jonction 3 et il est aussi utilisé pour être raccordé électriquement au conducteur électrique 16.The support rail 15 thus has a dual function since it allows the fixing of the junction block 3 and it is also used to be electrically connected to the electrical conductor 16.

Le système de liaison électrique 7 comprend également un dispositif de serrage 22 de type ressort à lames 23 agencé pour maintenir la portion conductrice 13' en une position de liaison avec la barrette conductrice 21 comme illustré aux figures 1, 2, 7, 8.The electrical connection system 7 also comprises a clamping device 22 of the leaf spring type 23 arranged to hold the conductive portion 13 'in a position of connection with the conductive bar 21 as illustrated in figures 1, 2 , 7, 8 .

Selon d'autres alternatives non détaillées, tout autre type de dispositif de serrage 22 pourrait être utilisé pourvu que le dispositif de serrage 22 soit agencé pour maintenir la portion conductrice 13' en une position de liaison avec la barrette conductrice 21. Un dispositif de serrage 22 à vis pourrait par exemple être utilisé.According to other alternatives, not detailed, any other type of clamping device 22 could be used provided that the clamping device 22 is arranged to hold the conductive portion 13 'in a position of connection with the conductive bar 21. A clamping device 22 screw could for example be used.

Le ressort à lames 23 comprend une branche d'appui 23' agencée pour être montée à la barrette conductrice 21. Pour ce faire la barrette conductrice 21 présente un enfoncement 25 ou une ouverture traversante issue d'une découpe adaptée pour l'emboitement à force d'une partie de fixation 27 de la branche d'appui 23'.The leaf spring 23 comprises a support branch 23 'arranged to be mounted on the conductive bar 21. To do this, the conductive bar 21 has a recess 25 or a through opening resulting from a cutout suitable for force-fitting. of a fixing part 27 of the support branch 23 '.

Le ressort à lames 23 comprend également un branche de serrage 23" jointe part une articulation 23'" à la branche d'appui 23'. La branche de serrage 23" est agencée pour maintenir la portion conductrice 13' en position de liaison.The leaf spring 23 also comprises a clamping branch 23 "joined by an articulation 23 '" to the support branch 23'. The clamping branch 23 "is arranged to hold the conductive portion 13 'in the connection position.

En effet la branche d'appui 23' est fixe par rapport à la barrette conductrice 21 et l'articulation 23'" impose une contrainte sur la portion conductrice 13' par l'intermédiaire de la branche de serrage 23".Indeed, the support branch 23 'is fixed relative to the conductive bar 21 and the articulation 23' "imposes a constraint on the conductive portion 13 'via the clamping branch 23".

Le canal de manœuvre 19 est disposé de manière à permettre le déplacement de la branche de serrage 23" pour le retrait du conducteur électrique 13.The operating channel 19 is arranged so as to allow the movement of the clamping branch 23 "for the removal of the electrical conductor 13.

Le corps isolant 5 présente une portion de support 29 de la branche d'appui 23' ayant pour fonction de bloquer la branche d'appui 23' lors du déplacement de la branche de serrage 23".The insulating body 5 has a support portion 29 of the support branch 23 'whose function is to block the support branch 23' during the movement of the clamping branch 23 ".

La barrette conductrice 21 présente une portion extrême pliée 31 engendrant une première partie 33' d'une zone de coopération 35 ou avancée de coopération 33 et une deuxième partie 37' de la zone de coopération 35 ou butée de coopération 37.The conductive bar 21 has a folded end portion 31 generating a first part 33 ′ of a cooperation zone 35 or cooperation projection 33 and a second part 37 ′ of the cooperation zone 35 or cooperation stop 37.

Cette première partie 33' de la barrette conductrice 21 est agencée pour coopérer avec une première partie complémentaire 39 du rail de support 15 s'étendant selon un premier plan 39'.This first part 33 'of the conductive bar 21 is arranged to cooperate with a first complementary part 39 of the support rail 15 extending along a first plane 39'.

Cette deuxième partie 37' de la barrette de conductrice 21 est agencée pour coopérer avec une deuxième partie complémentaire 41 du rail de support 15 s'étendant selon un deuxième plan 41' transversal au premier plan 39'.This second part 37 'of the conductor bar 21 is arranged to cooperate with a second complementary part 41 of the support rail 15 extending along a second plane 41' transverse to the first plane 39 '.

La barrette conductrice 21 présente également une surface de contact longitudinale 43 sur lequel sont ménagés un emplacement de contact électrique 45 avec la portion conductrice 13' en position de liaison, l'avancée de coopération 33 et la butée de coopération 37.The conductive bar 21 also has a longitudinal contact surface 43 on which are formed an electrical contact location 45 with the conductive portion 13 'in the connection position, the cooperation projection 33 and the cooperation stop 37.

L'emplacement de contact électrique 45 s'étend de manière rectiligne selon un profil engendrant une ou plusieurs rainures pour un meilleur maintien de la portion conductrice 13' en position de liaison.The electrical contact location 45 extends in a rectilinear manner along a profile generating one or more grooves for better retention of the conductive portion 13 'in the connection position.

La barrette conductrice 21 présente en outre une ouverture de passage 47 pour l'insertion de la portion conductrice 13' en position de liaison. Cette ouverture de passage 47 résulte par exemple d'une découpe effectuée avant pliage de la barrette conductrice 21.The conductive bar 21 also has a passage opening 47 for the insertion of the conductive portion 13 'in the connection position. This passage opening 47 results for example from a cut made before folding the conductive bar 21.

Le système de liaison électrique 7 comprend également un dispositif de maintien 49 agencé pour maintenir le rail de support 15 en une position de coopération avec la barrette conductrice 21.The electrical connection system 7 also comprises a holding device 49 arranged to hold the support rail 15 in a position of cooperation with the conductive bar 21.

La coopération se fait par contact, ce qui permet une transmission du courant entre la barrette conductrice 21 et le rail de support 15.The cooperation takes place by contact, which allows current transmission between the conductive bar 21 and the support rail 15.

La barrette conductrice 21 comprend une première partie 51 et une deuxième partie 53 au moins partiellement en regard de la première partie 51.The conductive bar 21 comprises a first part 51 and a second part 53 at least partially opposite the first part 51.

La première partie 51 comprend la surface de contact longitudinale 43 et la deuxième partie 53 coopère avec le dispositif de maintien 49. Le fait de disposer de ces deux parties 51, 53 permet de réaliser un système de liaison électrique 7 compact et/ou de s'adapter à des contraintes géométriques imposées au bloc de jonction 3.The first part 51 comprises the longitudinal contact surface 43 and the second part 53 cooperates with the holding device 49. The fact of having these two parts 51, 53 makes it possible to produce a compact electrical connection system 7 and / or s '' adapt to geometric constraints imposed on the terminal block 3.

La barrette conductrice 21 peut ainsi être obtenue par une découpe dans une tôle de base puis par pliage.The conductive bar 21 can thus be obtained by cutting in a base sheet and then by folding.

Comme illustré aux figures 1 à 6, la barrette conductrice peut présenter une forme générale en U. La première partie 51 la deuxième partie 53 sont chacune ménagée dans une branche différente du U.As shown in figures 1 to 6 , the conductive bar may have a general U-shape. The first part 51 the second part 53 are each formed in a different branch of the U.

La forme générale en U de la barrette conductrice 21 est obtenue à partir d'une lame conductrice découpée dans une tôle de base. La lame est comprise dans un contour rectangulaire ce qui permet une économie de matière en limitant les chutes lors de la découpe. Lors de la découpe les ouvertures traversantes sont aussi créées.The general U-shape of the conductive bar 21 is obtained from a conductive blade cut from a base sheet. The blade is included in a rectangular outline, which saves material by limiting scraps during cutting. When cutting, through openings are also created.

Alternativement, il est possible comme illustré aux figures 7 et 8 de prévoir une barrette conductrice 21 avant pliage comprenant plusieurs portions transversales reliées les unes aux autres pour engendrer une liaison latérale 55 après pliage.Alternatively, it is possible as illustrated in figures 7 and 8 to provide a conductive bar 21 before folding comprising several transverse portions connected to each other to generate a lateral connection 55 after folding.

Cette disposition permet de maintenir une section importante pour une bonne transmission du courant une fois la barrette conductrice 21 pliée. La barrette conductrice 21 une fois pliée présente également une bonne solidité et ne risque pas d'être déformée lors du montage dans le bloc de jonction 3.This arrangement makes it possible to maintain a large section for good current transmission once the conductive strip 21 is folded. The conductive bar 21 once folded also has good strength and does not risk being deformed during assembly in the junction block 3.

Le dispositif de maintien comprend un ressort à lames additionnel 57. Ce ressort à lames additionnel 57 peut être similaire au ressort à lames maintenant la portion conductrice 13' en position de liaison.The retaining device comprises an additional leaf spring 57. This additional leaf spring 57 may be similar to the leaf spring holding the conductive portion 13 'in the connection position.

Cette disposition permet une standardisation de cette pièce et l'utilisation d'une référence en moins pour la gestion de pièces par le fabricant, le dispositif de maintien 49 étant identique au ressort à lames 23.This arrangement allows standardization of this part and the use of one less reference for the management of parts by the manufacturer, the holding device 49 being identical to the leaf spring 23.

Le ressort à lames additionnel 57 comprend une branche d'appui additionnelle 57' pourvue d'une partie de fixation additionnelle 60 agencée pour être fixée à un enfoncement additionnel 59 de la barrette conductrice 21 de manière similaire au ressort à lames 23 de la portion conductrice 13'.The additional leaf spring 57 comprises an additional support leg 57 'provided with an additional fixing part 60 arranged to be fixed to an additional recess 59 of the conductive bar 21 in a similar manner to the leaf spring 23 of the conductive portion 13 '.

La branche d'appui 57' s'étend dans le prolongement de la deuxième partie 53 de la barrette conductrice 21. Cette disposition permet également de réduire la taille et donc la matière nécessaire à la fabrication de la barrette conductrice 21.The support branch 57 'extends in the extension of the second part 53 of the conductive bar 21. This arrangement also makes it possible to reduce the size and therefore the material necessary for the manufacture of the conductive bar 21.

Le ressort à lames additionnel 57 comprend également une branche de serrage additionnelle 57" agencée pour coopérer avec la portion 15' du rail de support 15 en position de coopération.The additional leaf spring 57 also comprises an additional clamping branch 57 "arranged to cooperate with the portion 15 'of the support rail 15 in the cooperating position.

De la même manière que le ressort à lames 23, le ressort à lames additionnel 57 comprend une articulation 57"'. Ainsi la branche de serrage additionnelle 57" maintien la portion 15' du rail de support 15 en position de coopération.In the same way as the leaf spring 23, the additional leaf spring 57 comprises an articulation 57 "'. Thus the additional clamping branch 57" maintains the portion 15' of the support rail 15 in the cooperative position.

Le système de liaison électrique 7 obtenu comprend donc peu de pièces, est compact et est apte à respecter des contraintes géométriques de manque de place pour son intégration dans le bloc de jonction.The electrical connection system 7 obtained therefore comprises few parts, is compact and is able to comply with geometric constraints of lack of space for its integration into the junction block.

Comme il va de soi, l'invention ne se limite pas à la seule forme d'exécution de ce système de liaison électrique, décrit ci-dessus à titre d'exemple, elle en embrasse au contraire toutes les variantes de réalisation telles que définies dans les revendications.As goes without saying, the invention is not limited to the sole embodiment of this electrical connection system, described above by way of example, it embraces on the contrary all the variant embodiments thereof as defined. in the claims.

Claims (8)

  1. An electrical connection system (7) for an electrical apparatus (1) such as a junction block (3), the electrical connection system (7) comprising:
    - a conductive strip (21) having an electrical contact location (45) arranged to cooperate with a conductive portion (13') of an electrical conductor (13) in a connection position and a cooperation area (35) arranged to cooperate with a portion (15') of a support rail (15) in a cooperation position, the conductive strip (21) comprising a first portion (51) and a second portion (53), the first portion (51) being facing the second portion (53), the conductive strip (21) having a U-like general shape,
    - a clamping device (22) arranged to hold the conductive portion (13') in the connection position, such as a leaf spring (23) comprising a bearing branch (23') arranged to be mounted to the conductive strip (21) and a clamping branch (23") arranged to hold the conductive portion (13') in the connection position,
    - a holding device (49) arranged to hold the cooperation position with the portion (15') of the support rail (15),
    the holding device (49) comprising an additional leaf spring (57) provided with an additional bearing branch (57') arranged to be mounted to the conductive strip (21) and an additional clamping branch (57") arranged to cooperate with the portion (15') of the support rail (15) in the cooperation position, the additional bearing branch (57') extending in the extension of the second portion (53) of the conductive strip (21), the cooperation area (35) being formed in the first portion (51) of the conductive strip (21).
  2. The electrical connection system (7) according to claim 1, wherein the conductive strip (21) has a longitudinal contact surface (43) on which are formed the electrical contact location (45) and the cooperation area (35).
  3. The electrical connection system (7) according to any of claims 1 or 2, wherein the cooperation area (35) comprises a first portion (33') and a second portion (37'), the first portion (33') being able to cooperate with a first complementary portion (39) of the portion (15') of the support rail (15) extending in a first plane (39') and the second portion (37') being able to cooperate with a second complementary portion (41) of the portion (15') of the support rail (15) extending along a second plane (41') transverse to the first plane (41).
  4. The electrical connection system (7) according to any of claims 1 to 3, wherein the bearing branch (23') extends in a plane transverse to the extension plane of the additional bearing branch (57').
  5. The electrical connection system (7) according to any of claims 1 to 4, wherein the conductive strip (21) has a passage opening (47) for the insertion of the conductive portion (13') in the connection position.
  6. The electrical connection system (7) according to any of claims 1 to 5, wherein the conductive strip (21) is constituted by a folded conductive blade.
  7. The electrical connection system (7) according to any of claims 1 to 6, wherein the conductive strip (21) comprises a depression (25) adapted for the forced fitting of a fixing portion (27) of the bearing branch (23') and/or comprises an additional depression (59) adapted for the forced fitting of an additional fixing portion (60) of the additional bearing branch (57').
  8. A junction block (1) comprising an insulating body (5) in which is formed an electrical connection system (7) according to any of claims 1 to 7.
EP16787343.9A 2016-09-29 2016-09-29 Electrical connection system comprising an additional leaf spring Active EP3520177B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2016/073300 WO2018059696A1 (en) 2016-09-29 2016-09-29 Electrical connection system comprising an additional leaf spring

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EP3520177A1 EP3520177A1 (en) 2019-08-07
EP3520177B1 true EP3520177B1 (en) 2020-11-11

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US20190229440A1 (en) 2019-07-25
WO2018059696A1 (en) 2018-04-05
CN109845038A (en) 2019-06-04
CN109845038B (en) 2021-04-13
US10985475B2 (en) 2021-04-20
EP3520177A1 (en) 2019-08-07

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