EP1014495B1 - Connecting spring - Google Patents

Connecting spring Download PDF

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Publication number
EP1014495B1
EP1014495B1 EP99420245A EP99420245A EP1014495B1 EP 1014495 B1 EP1014495 B1 EP 1014495B1 EP 99420245 A EP99420245 A EP 99420245A EP 99420245 A EP99420245 A EP 99420245A EP 1014495 B1 EP1014495 B1 EP 1014495B1
Authority
EP
European Patent Office
Prior art keywords
branch
supporting arm
spring
zone
pinch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99420245A
Other languages
German (de)
French (fr)
Other versions
EP1014495A1 (en
Inventor
Bernard Bechaz
Stéphane Prost
Philippe France
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB France SAS
Original Assignee
ABB Entrelec SAS
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Publication date
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Publication of EP1014495A1 publication Critical patent/EP1014495A1/en
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Publication of EP1014495B1 publication Critical patent/EP1014495B1/en
Anticipated expiration legal-status Critical
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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
    • H01R4/48455—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a leaf spring to bias the conductor toward the busbar insertion of a wire only possible by pressing on the spring
    • 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
    • H01R4/4811—Spring details
    • H01R4/4816—Spring details the spring shape preventing insertion of the conductor end when the spring is unbiased
    • 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
    • H01R4/4846—Busbar details

Definitions

  • the present invention relates to a connection spring making it possible to make an electrical connection of a stripped wire in a terminal block for electrical conductor.
  • the pinch branch is moved to allow insertion of the wire to be connected.
  • a screwdriver usually comes to control this movement by acting at the level of the elastic bow.
  • problems can occur when you connect the bare end of a driver. If the spring is not fully maneuvered, it may happen that introducing the end of the conductor, it comes to push the branch pinch the spring and fold it. Releasing the spring, this one just stick the poorly connected conductor against a wall of the housing and the operator believes that he has made a good connection. However, the contact electric is bad and the connection terminal can burn. This problem happens especially with massive drivers.
  • connection terminal comprising the connection spring is usually placed in an insulating housing. It is sometimes provided in this housing to make a support for receiving the free end of the branch of pinching when the spring is bandaged. However, when the spring is, for one reason or another, deformed, it may be that the free end of the pinch branch, instead of coming to rest on the support made level of housing, come under this support. This results in a deformation even more important of the connection spring and / or a wedging of this spring in the housing.
  • DE-C-19646103 shows a spring according to the preamble of claim 1.
  • the present invention aims to provide a new connection device providing better guidance and support of the pinch branch when the spring is stressed and released.
  • this device will be of a lower cost price than known spring devices, and can be adapted to the case where the bar link is placed above the compression spring, as shown in EP-0 735 629.
  • the present invention proposes a spring of connection for making an electrical connection of a bare wire in an electrical conductor connection terminal made in a flat elastic material, which has a support arm intended for come to bear against a fixed conductive part of the terminal of connection as well as a rear branch, facing the branch support, connected by an elastic connection zone to the latter and the free end is bent towards the support branch to form a mobile pinch branch, presenting on the side of its free end, a substantially flat portion provided with an opening for the passage of the conductive fixed part and the stripped wire so that the edge of the opening located on the side of the free end of the pinch branch movable comes to maintain the stripped end of the wire in support against the part fixed conductor, a connecting zone connecting the two branches elastically.
  • the support branch is provided with a zone of guide extending substantially parallel to the pinch leg, on the opposite side to the back branch.
  • the guiding is carried out at the connection spring.
  • This position minimizes the amount of material needed for realization of the guiding function.
  • the surplus of material used to realize the guide area on the connecting spring can easily be less than the amount of material generally used for guidance on the conductive fixed part.
  • the guidance zone can also easily extend over the entire width of the spring. This ensures support reliable pinch branch.
  • connection spring In one embodiment of the connection spring, the area of guidance extends substantially perpendicular to the support branch.
  • the guide zone is advantageously attached to the branch support distance from the free edge of the bearing branch bearing against the fixed conductive part.
  • the guide zone advantageously comprises a window in which pass the conductive fixed part and the stripped wire to Connect.
  • the guide zone is obtained by cutting at the level of the branch of support then by folding.
  • the cut made in the support branch is advantageously U-shaped, the base of the U being located on the side of the free end of the support branch.
  • connection terminal for an electrical conductor which comprises a connection spring such as described above.
  • a connection terminal can take place in any type of electrical device requiring the connection of a wire. It can for example be a switch, a circuit breaker, etc .... such a connection terminal is particularly suitable for a block of junction. It is then arranged in an insulating housing. Preferably, this insulating housing has a support on which comes to support a free end of the guide region of the connection spring.
  • FIGS 1 to 3 show a connection spring 2 according to the invention.
  • This spring 2 is in the form of a loop presenting a fixed support branch 4 and a rear branch 5 which faces the branch 4.
  • a connecting zone 8 connects the two branches 4 and 5 forming a loop.
  • the free end of the rear branch 5 is folded towards the support branch 4.
  • the folded part forms a pinch branch mobile 6, which extends substantially perpendicular to the branch 4.
  • the spring is made of a strip of flat material, for for example, a strip of steel sheet.
  • the pinch branch 6 has an opening of pinch 10 of substantially rectangular shape.
  • This opening 10 has a pinch edge 12 on the free end side of the pinch branch, and a stop edge 14 on the side of the 8. As can be seen in FIGS. 4 and 5, this opening 10 is intended to receive the free end of the support branch 4, a connecting bar 16, as well as the stripped end of a wire 18.
  • connection spring according to the invention also has a guide zone 20.
  • the latter extends from the branch 4 substantially parallel to the pinch branch 6 and just below this branch 6.
  • the area 20 extends outwardly of the spring 2, that is to say, on the side opposite to the connecting zone 8 and to the rear branch 5. This zone of guide 20 is oriented towards the outside of the loop.
  • the guiding zone is substantially U-shaped. free ends of the branches of the U are attached to the support branch 4 thus defining an opening 22. The latter is intended to receive the bar 16 and the end of a stripped wire 18 (Figure 5).
  • the guide zone 20 is obtained by making a cut in the flat material from which the spring 2 is made, then by a folding.
  • the cutout is U-shaped and is made at the level of the support leg 4, the base of the U being oriented towards the free end of the strip of flat material, and the branches of the U being substantially parallel at the edges of this strip of material.
  • the end of the material strip is then folded towards the outside of the loop so as to form the zone of guidance as can be seen in the drawing.
  • the ends of the branches of the guide zone 20 are bent.
  • Figures 4 and 5 show the spring described above in position in a connection terminal.
  • the latter has a insulating housing made of synthetic material obtained by molding. Housing is provided in this housing to receive, in known manner, the spring of connection 2. Protrusions 24 are provided to guarantee a good positioning and a good hold of the connection spring in its housing.
  • a support 26 is also provided in the insulating housing and is placed so that the free end of the guide zone 20 comes take support on this support 26.
  • the link 16 is here very simple. Indeed, at the level of support branch 4, it is in the form of a flat blade. The support branch 4 comes to bear on one side of this blade that passes through openings 10 and 22. In the relaxed position shown in Figure 4, the pinch edge abuts against the bar 16.
  • the spring 2 is put under constraint.
  • the end of a screwdriver is used 28 that just pushes the pinch branch 6 so that the opening 10 of the pinch branch 6 comes next to the opening 22 of the guiding zone 20.
  • the connection zone 8 then has tendency to return the connection spring 2 to its position shown on Figure 4.
  • the two openings being opposite each other, the end of a bare wire 18 is introduced.
  • the pinch branch 6 comes, as known, pinch the end of the wire bare against the bar 16.
  • the fact of providing the guide zone on the spring itself makes it possible to save material, and thus to achieve a connection terminal with connection spring at a lower cost. In indeed, very little material is needed to achieve the guidance zone 20 compared to the amount of material needed to achieve a guiding the pinch branch at the conductive bar.
  • the guide zone 20 is also easy to make. Indeed, a cutting and folding are sufficient for its realization.
  • the guide zone 20 ensuring perfect guidance of the branch pinch, it virtually eliminates any risk of jamming the pinch branch when maneuvering it.

Landscapes

  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Multi-Conductor Connections (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Description

La présente invention concerne un ressort de connexion permettant de réaliser une connexion électrique d'un fil dénudé dans une borne de raccordement pour conducteur électrique.The present invention relates to a connection spring making it possible to make an electrical connection of a stripped wire in a terminal block for electrical conductor.

Il est connu d'utiliser des ressorts pour venir maintenir l'extrémité d'un conducteur dénudé contre un rail d'amenée de courant dans une borne de raccordement. Les documents DE 3 727 091 et DE 4 237 733 décrivent des bornes de raccordement de ce type. On trouve dans ces documents un ressort de pincement réalisé dans un matériau élastique plat formé en un genre de boucle. Le ressort de pincement présente une branche de butée destinée à venir en appui sur un rail de courant, ainsi qu'une branche de pincement repliée depuis la partie de dos du ressort de pincement en s'étendant transversalement au rail d'amenée de courant, ainsi qu'un arc élastique reliant ensemble par l'arrière la partie de dos et la branche de butée. La branche de pincement est munie d'une cavité de pincement. Cette dernière est traversée par le rail d'amenée du courant. Le ressort est tel que lorsque l'extrémité dénudée d'un conducteur électrique est introduite dans la cavité de pincement, le ressort vient plaquer l'extrémité dénudée de ce fil contre le rail d'amenée de courant.It is known to use springs to maintain the end of a stripped conductor against a power supply rail in a connection terminal. Documents DE 3 727 091 and DE 4,237,733 describe connection terminals of this type. We find in these documents a pinch spring made of a material flat elastic formed into a kind of loop. The pinch spring has a stop branch intended to rest on a rail of current, as well as a pinch branch bent from the back part of the pinch spring extending transversely to the feed rail of current, as well as an elastic arch connecting together from behind the part back and the stop branch. The pinch branch is provided with a pinch cavity. The latter is crossed by the feed rail of the current. The spring is such that when the bare end of a conductor electric is introduced into the pinch cavity, the spring comes press the stripped end of this wire against the power supply rail.

Au cours d'une connexion, la branche de pincement est déplacée pour permettre l'introduction du fil à connecter. Un tournevis vient généralement commander ce mouvement en agissant au niveau de l'arc élastique. Avec de tels dispositifs de connexion, des problèmes peuvent survenir lorsqu'on vient raccorder l'extrémité dénudée d'un conducteur. Si le ressort n'est pas manoeuvré à fond, il peut arriver, qu'en introduisant l'extrémité du conducteur, celui-ci vienne pousser la branche de pincement du ressort et plier celle-ci. En relâchant le ressort, celui-ci vient plaquer le conducteur mal raccordé contre une paroi du boítier et l'opérateur croít qu'il a réalisé une bonne connexion. Toutefois, le contact électrique est mauvais et la borne de raccordement peut griller. Ce problème arrive notamment avec des conducteurs massifs.During a connection, the pinch branch is moved to allow insertion of the wire to be connected. A screwdriver usually comes to control this movement by acting at the level of the elastic bow. With such connection devices, problems can occur when you connect the bare end of a driver. If the spring is not fully maneuvered, it may happen that introducing the end of the conductor, it comes to push the branch pinch the spring and fold it. Releasing the spring, this one just stick the poorly connected conductor against a wall of the housing and the operator believes that he has made a good connection. However, the contact electric is bad and the connection terminal can burn. This problem happens especially with massive drivers.

La borne de raccordement comportant le ressort de connexion est généralement placée dans un boítier isolant. Il est parfois prévu dans ce boítier de réaliser un support pour recevoir l'extrémité libre de la branche de pincement lorsque le ressort est bandé. Toutefois, lorsque le ressort est, pour une raison ou une autre, déformé, il se peut que l'extrémité libre de la branche de pincement, au lieu de venir en appui sur le support réalisé au niveau du boítier, vienne sous ce support. Il en résulte une déformation encore plus importante du ressort de connexion et/ou un coincement de ce ressort dans le boítier.The connection terminal comprising the connection spring is usually placed in an insulating housing. It is sometimes provided in this housing to make a support for receiving the free end of the branch of pinching when the spring is bandaged. However, when the spring is, for one reason or another, deformed, it may be that the free end of the pinch branch, instead of coming to rest on the support made level of housing, come under this support. This results in a deformation even more important of the connection spring and / or a wedging of this spring in the housing.

Pour résoudre ces problèmes, il est connu de venir guider la branche de pincement. Dans les documents de l'art antérieur précités, cette fonction de guidage est assurée par une partie du rail d'amenée de courant, appelée aussi barrette. Cette dernière est alors pliée deux fois : une fois pour former une face latérale dont l'arête supérieure sert au guidage de la branche de pincement du ressort et une seconde fois pour former la branche d'appui pour le fil dénudé, ou inversement. Une figure du document DE-196 41 206 montre bien un tel pliage.To solve these problems, it is known to come to guide the pinch branch. In the documents of the aforementioned prior art, this Guiding function is provided by a portion of the current supply rail, also called barrette. The latter is then folded twice: once to form a lateral face whose upper edge serves to guide the pinch branch of the spring and a second time to form the support branch for bare wire, or vice versa. A figure from Document DE-196 41 206 shows such a folding.

Dans cette solution, seul le bord supérieur de la barrette sert au guidage du ressort. Seul le bord supérieur de toute une partie latérale de la barrette est utile. On dépense alors beaucoup de matériau uniquement pour réaliser une arête de guidage. Ceci renchérit le coût de la barrette.In this solution, only the upper edge of the bar is used for spring guide. Only the upper edge of a whole lateral part of the bar is useful. We spend a lot of material just to make a guide edge. This increases the cost of the bar.

Un autre inconvénient de cette solution est que le guidage de la branche de pincement n'est réalisé que d'un seul côté. Le premier problème évoqué ci-dessus (conducteur venant plier la branche de pincement lors de son introduction) n'est alors que partiellement résolu. En effet, si un conducteur massif vient en appui du côté opposé au bord de guidage de la barrette, la branche de pincement peut tout de même être déformée.Another disadvantage of this solution is that the guidance of the pinch branch is made only from one side. The first problem mentioned above (driver coming to bend the pinch branch when its introduction) is only partially solved. Indeed, if a solid conductor comes to bear on the opposite side to the guide edge of the barrette, the pinch branch can still be deformed.

Un autre inconvénient de cette solution est qu'elle est uniquement adaptée au cas où la barrette se trouve en dessous du ressort de connexion c'est-à-dire du côté de la zone élastique reliant la branche d'appui à la branche de pincement. Cette solution n'est pas du tout adaptée à un montage d'une barrette au-dessus du ressort, comme montré dans le document EP-0 735 629.Another disadvantage of this solution is that it is only adapted to the case where the bar is below the spring connection that is to say on the side of the elastic zone connecting the branch of support to the pinch branch. This solution is not at all adapted to a mounting of a bar over the spring, as shown in EP-0 735 629.

Le document DE-C-19646103 montre un ressort selon le préambule de la revendication 1.DE-C-19646103 shows a spring according to the preamble of claim 1.

La présente invention a pour but de fournir un nouveau dispositif de connexion assurant un meilleur guidage et support de la branche de pincement lorsque le ressort est mis sous contrainte et relâché. Avantageusement, ce dispositif sera d'un prix de revient moins élevé que les dispositifs à ressort connus, et pourra être adapté au cas où la barrette de liaison est placée au-dessus du ressort de compression, comme montré dans le document EP-0 735 629.The present invention aims to provide a new connection device providing better guidance and support of the pinch branch when the spring is stressed and released. Advantageously, this device will be of a lower cost price than known spring devices, and can be adapted to the case where the bar link is placed above the compression spring, as shown in EP-0 735 629.

À cet effet, la présente invention propose un ressort de connexion permettant de réaliser une connexion électrique d'un fil dénudé dans une borne de raccordement pour conducteur électrique, réalisé dans un matériau élastique plat, qui présente une branche d'appui destinée à venir en appui contre une partie fixe conductrice de la borne de raccordement ainsi qu'une branche arrière, faisant face à la branche d'appui, reliée par une zone de liaison élastique à cette dernière et dont l'extrémité libre est recourbée vers la branche d'appui pour former une branche de pincement mobile, présentant du côté de son extrémité libre, une partie sensiblement plane munie d'une ouverture destinée au passage de la partie fixe conductrice et du fil dénudé de telle sorte que l'arête de l'ouverture située du côté de l'extrémité libre de la branche de pincement mobile vienne maintenir l'extrémité dénudée du fil en appui contre la partie fixe conductrice, une zone de liaison reliant les deux branches élastiquement.For this purpose, the present invention proposes a spring of connection for making an electrical connection of a bare wire in an electrical conductor connection terminal made in a flat elastic material, which has a support arm intended for come to bear against a fixed conductive part of the terminal of connection as well as a rear branch, facing the branch support, connected by an elastic connection zone to the latter and the free end is bent towards the support branch to form a mobile pinch branch, presenting on the side of its free end, a substantially flat portion provided with an opening for the passage of the conductive fixed part and the stripped wire so that the edge of the opening located on the side of the free end of the pinch branch movable comes to maintain the stripped end of the wire in support against the part fixed conductor, a connecting zone connecting the two branches elastically.

Selon l'invention, la branche d'appui est munie d'une zone de guidage s'étendant sensiblement parallèlement à la branche de pincement, du côté opposé à la branche arrière.According to the invention, the support branch is provided with a zone of guide extending substantially parallel to the pinch leg, on the opposite side to the back branch.

Ainsi, le guidage est réalisé au niveau du ressort de connexion. Cette position permet de minimiser la quantité de matériau nécessaire à la réalisation de la fonction de guidage. Le surplus de matériau utilisé pour réaliser la zone de guidage sur le ressort de connexion peut facilement être moindre que la quantité de matériau généralement utilisée pour le guidage sur la partie fixe conductrice. La zone de guidage peut aussi facilement s'étendre sur toute la largeur du ressort. Ceci permet d'assurer un support fiable de la branche de pincement.Thus, the guiding is carried out at the connection spring. This position minimizes the amount of material needed for realization of the guiding function. The surplus of material used to realize the guide area on the connecting spring can easily be less than the amount of material generally used for guidance on the conductive fixed part. The guidance zone can also easily extend over the entire width of the spring. This ensures support reliable pinch branch.

Dans une forme de réalisation du ressort de connexion, la zone de guidage s'étend sensiblement perpendiculairement par rapport à la branche d'appui.In one embodiment of the connection spring, the area of guidance extends substantially perpendicular to the support branch.

La zone de guidage se rattache avantageusement à la branche d'appui à distance du bord libre de la branche d'appui venant en appui contre la partie fixe conductrice.The guide zone is advantageously attached to the branch support distance from the free edge of the bearing branch bearing against the fixed conductive part.

Pour permettre un guidage et un support symétrique de la branche de pincement, la zone de guidage comporte avantageusement une fenêtre dans laquelle passent la partie fixe conductrice et le fil dénudé à connecter.To allow guidance and symmetrical support of the pinch branch, the guide zone advantageously comprises a window in which pass the conductive fixed part and the stripped wire to Connect.

Dans une forme de réalisation préférentielle du ressort selon l'invention, la zone de guidage est obtenue par découpe au niveau de la branche d'appui puis par pliage. Dans ce cas, la découpe réalisée dans la branche d'appui est avantageusement en forme de U, la base du U étant située du côté de l'extrémité libre de la branche d'appui.In a preferred embodiment of the spring according to the invention, the guide zone is obtained by cutting at the level of the branch of support then by folding. In this case, the cut made in the support branch is advantageously U-shaped, the base of the U being located on the side of the free end of the support branch.

L'invention concerne également une borne de raccordement pour conducteur électrique qui comporte un ressort de connexion tel que décrit ci-dessus. Une telle borne de raccordement peut prendre place dans tout type d'appareil électrique nécessitant de réaliser la connexion d'un fil. Il peut par exemple s'agir d'un commutateur, d'un disjoncteur, etc.... Une telle borne de raccordement est particulièrement adaptée à un bloc de jonction. Elle est alors disposée dans un boítier isolant. De préférence, ce boítier isolant présente un support sur lequel vient prendre appui une extrémité libre de la zone de guidage du ressort de connexion.The invention also relates to a connection terminal for an electrical conductor which comprises a connection spring such as described above. Such a connection terminal can take place in any type of electrical device requiring the connection of a wire. It can for example be a switch, a circuit breaker, etc .... such a connection terminal is particularly suitable for a block of junction. It is then arranged in an insulating housing. Preferably, this insulating housing has a support on which comes to support a free end of the guide region of the connection spring.

De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé, représentant à titre d'exemple non limitatif, une forme de réalisation d'un ressort de connexion selon l'invention.

  • Figures 1 à 3 sont des vues d'un ressort selon l'invention respectivement en perspective, en vue de face et en vue de dessus,
  • Figure 4 est une vue en coupe longitudinale du ressort des figures 1 à 3 en position montée contre une barrette, et
  • Figure 5 est une vue correspondant à la figure 4, le ressort de connexion étant en position précontrainte.
    • In any case, the invention will be better understood with the aid of the description which follows, with reference to the appended schematic drawing, representing by way of nonlimiting example, an embodiment of a connection spring according to the invention. .
  • Figures 1 to 3 are views of a spring according to the invention respectively in perspective, in front view and in plan view,
  • Figure 4 is a longitudinal sectional view of the spring of Figures 1 to 3 in position mounted against a bar, and
  • Figure 5 is a view corresponding to Figure 4, the connecting spring being in prestressed position.

    • Les figures 1 à 3 montrent un ressort de connexion 2 selon l'invention. Ce ressort 2 se présente en forme de boucle présentant une branche d'appui fixe 4 et une branche arrière 5 qui fait face à la branche d'appui 4. Une zone de liaison 8 relie les deux branches 4 et 5 en formant une boucle. L'extrémité libre de la branche arrière 5 est repliée vers la branche d'appui 4. La partie repliée forme une branche de pincement mobile 6, qui s'étend sensiblement perpendiculairement à la branche d'appui 4. Le ressort est réalisé dans une bande de matériau plat, par exemple, une bande de tôle en acier.Figures 1 to 3 show a connection spring 2 according to the invention. This spring 2 is in the form of a loop presenting a fixed support branch 4 and a rear branch 5 which faces the branch 4. A connecting zone 8 connects the two branches 4 and 5 forming a loop. The free end of the rear branch 5 is folded towards the support branch 4. The folded part forms a pinch branch mobile 6, which extends substantially perpendicular to the branch 4. The spring is made of a strip of flat material, for for example, a strip of steel sheet.

    La branche de pincement 6 présente une ouverture de pincement 10 de forme sensiblement rectangulaire. Cette ouverture 10 comporte une arête de pincement 12 du côté de l'extrémité libre de la branche de pincement, et une arête de butée 14 du côté de la zone de liaison 8. Comme on peut le voir sur les figures 4 et 5, cette ouverture 10 est destinée à recevoir l'extrémité libre de la branche d'appui 4, une barrette de liaison 16, ainsi que l'extrémité dénudée d'un fil 18.The pinch branch 6 has an opening of pinch 10 of substantially rectangular shape. This opening 10 has a pinch edge 12 on the free end side of the pinch branch, and a stop edge 14 on the side of the 8. As can be seen in FIGS. 4 and 5, this opening 10 is intended to receive the free end of the support branch 4, a connecting bar 16, as well as the stripped end of a wire 18.

    Le ressort de connexion selon l'invention présente également une zone de guidage 20. Cette dernière s'étend à partir de la branche d'appui 4 sensiblement parallèlement à la branche de pincement 6 et juste en dessous de cette branche 6. Par rapport à la branche d'appui 4, la zone de guidage 20 s'étend vers l'extérieur du ressort 2, c'est-à-dire, du côté opposé à la zone de liaison 8 et à la branche arrière 5. Cette zone de guidage 20 est orientée vers l'extérieur de la boucle.The connection spring according to the invention also has a guide zone 20. The latter extends from the branch 4 substantially parallel to the pinch branch 6 and just below this branch 6. In relation to the support branch 4, the area 20 extends outwardly of the spring 2, that is to say, on the side opposite to the connecting zone 8 and to the rear branch 5. This zone of guide 20 is oriented towards the outside of the loop.

    La zone de guidage présente sensiblement une forme de U. Les extrémités libres des branches du U sont rattachées à la branche d'appui 4 définissant ainsi une ouverture 22. Cette dernière est destinée à recevoir la barrette 16 ainsi que l'extrémité d'un fil dénudé 18 (figure 5).The guiding zone is substantially U-shaped. free ends of the branches of the U are attached to the support branch 4 thus defining an opening 22. The latter is intended to receive the bar 16 and the end of a stripped wire 18 (Figure 5).

    La zone de guidage 20 est obtenue en réalisant une découpe dans le matériau plat à partir duquel est réalisé le ressort 2, puis par un pliage. La découpe est en forme de U et est réalisée au niveau de la branche d'appui 4, la base du U étant orientée vers l'extrémité libre de la bande de matériau plat, et les branches du U étant sensiblement parallèles aux bords de cette bande de matériau. L'extrémité de la bande de matériau est alors repliée vers l'extérieur de la boucle de manière à former la zone de guidage telle qu'on peut la voir sur le dessin. Les extrémités des branches de la zone de guidage 20 sont coudées.The guide zone 20 is obtained by making a cut in the flat material from which the spring 2 is made, then by a folding. The cutout is U-shaped and is made at the level of the support leg 4, the base of the U being oriented towards the free end of the strip of flat material, and the branches of the U being substantially parallel at the edges of this strip of material. The end of the material strip is then folded towards the outside of the loop so as to form the zone of guidance as can be seen in the drawing. The ends of the branches of the guide zone 20 are bent.

    Les figures 4 et 5 montrent le ressort décrit ci-dessus en position dans une borne de raccordement. Cette dernière comporte un boítier isolant en matière synthétique obtenu par moulage. Un logement est prévu dans ce boítier pour recevoir, de manière connue, le ressort de connexion 2. Des saillies 24 sont prévues pour garantir un bon positionnement et un bon maintien du ressort de connexion dans son logement. Un support 26 est également prévu dans le boítier isolant et est placé de telle sorte que l'extrémité libre de la zone de guidage 20 vienne prendre appui sur ce support 26.Figures 4 and 5 show the spring described above in position in a connection terminal. The latter has a insulating housing made of synthetic material obtained by molding. Housing is provided in this housing to receive, in known manner, the spring of connection 2. Protrusions 24 are provided to guarantee a good positioning and a good hold of the connection spring in its housing. A support 26 is also provided in the insulating housing and is placed so that the free end of the guide zone 20 comes take support on this support 26.

    La barrette de liaison 16 est ici de forme très simple. En effet, au niveau de la branche d'appui 4, elle se présente sous la forme d'une lame plane. La branche d'appui 4 vient prendre appui sur une face de cette lame qui passe dans les ouvertures 10 et 22. Dans la position relâchée montrée à la figure 4, l'arête de pincement vient en butée contre la barrette 16.The link 16 is here very simple. Indeed, at the level of support branch 4, it is in the form of a flat blade. The support branch 4 comes to bear on one side of this blade that passes through openings 10 and 22. In the relaxed position shown in Figure 4, the pinch edge abuts against the bar 16.

    Pour réaliser une connexion, le ressort 2 est mis sous contrainte. Pour ce faire, on utilise par exemple l'extrémité d'un tournevis 28 qui vient pousser la branche de pincement 6 de telle sorte que l'ouverture 10 de la branche de pincement 6 vienne en regard de l'ouverture 22 de la zone de guidage 20. La zone de liaison 8 a alors tendance à ramener le ressort de connexion 2 dans sa position montrée sur la figure 4. Les deux ouvertures étant l'une face à l'autre, l'extrémité d'un fil dénudé 18 est introduite. En retirant l'extrémité du tournevis 28, la branche de pincement 6 vient, de manière connue, pincer l'extrémité du fil dénudé contre la barrette 16.To make a connection, the spring 2 is put under constraint. For this purpose, for example, the end of a screwdriver is used 28 that just pushes the pinch branch 6 so that the opening 10 of the pinch branch 6 comes next to the opening 22 of the guiding zone 20. The connection zone 8 then has tendency to return the connection spring 2 to its position shown on Figure 4. The two openings being opposite each other, the end of a bare wire 18 is introduced. By removing the end of the screwdriver 28, the pinch branch 6 comes, as known, pinch the end of the wire bare against the bar 16.

    Pendant tout le mouvement de la branche de pincement 6, tant lorsque le ressort 2 est mis en contrainte que lorsque le ressort est relâché pour venir pincer l'extrémité du fil dénudé contre la barrette 16, la branche de pincement 6 est guidée sur la zone de guidage 20. Il est donc inutile de prévoir un guidage au niveau de la barrette 16 ou du boítier isolant. De plus, le guidage réalisé par la zone de guidage 20 est réalisé sur toute la largeur de la branche de pincement 6. On a donc un guidage symétrique par rapport à l'axe de cette branche 6. La course de la branche de pincement 6 est ainsi bien maítrisée.During the whole movement of the pinch branch 6, both when the spring 2 is stressed only when the spring is released to pinch the end of the stripped wire against the bar 16, the branch pinch 6 is guided on the guide zone 20. It is therefore unnecessary to provide guidance at the bar 16 or the insulating housing. Of moreover, the guidance provided by the guiding zone 20 is carried out all over the width of the pinch branch 6. So we have symmetrical guidance relative to the axis of this branch 6. The race of the branch of pinch 6 is well controlled.

    En outre, le fait de prévoir la zone de guidage sur le ressort lui-même permet de réaliser une économie de matériau, et donc de réaliser une borne de raccordement avec ressort de connexion à un coût moindre. En effet, très peu de matériau est nécessaire pour réaliser la zone de guidage 20 si l'on compare à la quantité de matériau nécessaire pour réaliser un guidage de la branche de pincement au niveau de la barrette conductrice. La zone de guidage 20 est également facile à réaliser. En effet, une découpe et un pliage suffisent à sa réalisation.In addition, the fact of providing the guide zone on the spring itself makes it possible to save material, and thus to achieve a connection terminal with connection spring at a lower cost. In indeed, very little material is needed to achieve the guidance zone 20 compared to the amount of material needed to achieve a guiding the pinch branch at the conductive bar. The guide zone 20 is also easy to make. Indeed, a cutting and folding are sufficient for its realization.

    Dans le cas où la lame de tournevis 28 ne manoeuvre pas suffisamment la branche de pincement 6, l'extrémité du fil dénudé 18 vient en appui sur l'extrémité de la branche de pincement en dehors de la fenêtre 10 prévue pour son passage. La présence de la zone de guidage empêche alors la branche de pincement 6 de plier sous l'effort exercé par l'extrémité du fil dénudé. Lorsque l'opérateur retire la lame de tournevis 28, le fil n'est pas maintenu dans la borne de raccordement. Une légère traction sur le fil permet de le retirer hors du boítier. Par rapport aux bornes de raccordement à ressort de ce type de l'art antérieur, on supprime ainsi le risque de déformer la branche de pincement et de venir coincer l'extrémité du fil dénudé entre la branche de pincement déformée et une paroi du boítier isolant. Le support 26 sur lequel vient reposer la zone de guidage 20 permet d'augmenter sensiblement la résistance à la déformation de la branche de pincement 6. Toutefois, sa présence est optionnelle car la zone de guidage 20 peut encaisser les efforts qui sont généralement mis en oeuvre lors de l'introduction, même en poussant fort, d'une extrémité dénudée d'un câble.In the case where the screwdriver blade 28 does not maneuver sufficiently the pinch branch 6, the end of the stripped wire 18 comes resting on the end of the pinch branch outside the window 10 planned for his passage. The presence of the guide zone prevents then the pinch branch 6 to bend under the force exerted by the end bare wire. When the operator removes the screwdriver blade 28, the wire is not maintained in the connection terminal. A slight pull on the wire remove it from the housing. Compared to connection terminals spring of this type of the prior art, thus eliminating the risk of deform the pinch branch and come jam the end of the wire stripped between the deformed pinch branch and a wall of the housing insulating. The support 26 on which the guide zone 20 comes to rest significantly increases the resistance to deformation of the pinch branch 6. However, its presence is optional because the zone guide 20 can cash out the efforts that are usually put in during the introduction, even when pushing hard, from one end stripped of a cable.

    La zone de guidage 20 assurant un parfait guidage de la branche de pincement, on élimine quasiment tout risque de coincement de la branche de pincement lors de la manoeuvre de celle-ci.The guide zone 20 ensuring perfect guidance of the branch pinch, it virtually eliminates any risk of jamming the pinch branch when maneuvering it.

    Comme il va de soi, l'invention ne se limite pas à la forme de réalisation décrite ci-dessus à titre d'exemple non limitatif ; elle en embrasse au contraire toutes les variantes dans le cadre des revendications ci-après.It goes without saying that the invention is not limited to the form of embodiment described above by way of non-limiting example; she on the contrary embraces all variants within the scope of the claims below.

    Claims (8)

    1. Connecting spring (2) which makes it possible to make an electrical connection of a bared wire (18) in a connecting terminal for an electrical conductor and which is made from a flat elastic material and has a supporting arm (4) which is intended to rest against a fixed conductive part (16) of the connecting terminal and also a rear arm (5) which faces the supporting arm (4) and is linked to the latter by an elastic linking zone (8) and whose free end is bent over towards the supporting arm (4) so as to form a movable pinching arm (6) and which has, close to its free end, a substantially flat part provided with an opening (10) which is intended for the passage of the fixed conductive part (16) and of the bared wire (18) in such a way that the edge (12) of the opening (10) which is situated close to the free end of the movable pinching arm (6) keeps the bared end of the wire (18) resting against the fixed conductive part (16), the supporting arm (4) being provided with a guiding zone (20),
      characterised in that the guiding zone extends substantially parallel to the pinching arm (6) on the opposite side to the rear arm (5).
    2. Connecting spring (2) according to claim 1, characterised in that the guiding zone (20) extends substantially perpendicularly in relation to the supporting arm (4).
    3. Connecting spring (2) according to claim 1 or 2, characterised in that the guiding zone (20) is fastened to the supporting arm (4) at a distance from the free edge of said supporting arm (4) which rests against the fixed conductive part (16).
    4. Connecting spring (2) according to one of claims 1 to 3, characterised in that the guiding zone (20) has a window (22) into which the fixed conductive part (16) and the bared wire (18) to be connected pass.
    5. Connecting spring (2) according to one of claims 1 to 4, characterised in that the guiding zone (20) is obtained by cutting out at the level of the supporting arm (4) and then by folding.
    6. Connecting spring (2) according to claim 5, characterised in that the cut-out made in the supporting arm (4) is in the form of a U, the base of the U being situated close to the free end of the supporting arm.
    7. Connecting terminal for an electrical conductor, characterised in that it has a connecting spring (2) according to one of claims 1 to 6.
    8. Junction block having an insulating case and at least one connecting terminal according to claim 7, characterised in that the insulating case has a support (26) on which a free end of the guiding zone (20) rests.
    EP99420245A 1998-12-23 1999-12-15 Connecting spring Expired - Lifetime EP1014495B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9816585 1998-12-23
    FR9816585A FR2787932B1 (en) 1998-12-23 1998-12-23 CONNECTION SPRING

    Publications (2)

    Publication Number Publication Date
    EP1014495A1 EP1014495A1 (en) 2000-06-28
    EP1014495B1 true EP1014495B1 (en) 2005-02-09

    Family

    ID=9534630

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP99420245A Expired - Lifetime EP1014495B1 (en) 1998-12-23 1999-12-15 Connecting spring

    Country Status (7)

    Country Link
    US (1) US6196883B1 (en)
    EP (1) EP1014495B1 (en)
    BR (1) BR9905928A (en)
    CA (1) CA2293179C (en)
    DE (1) DE69923651T2 (en)
    ES (1) ES2237062T3 (en)
    FR (1) FR2787932B1 (en)

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    FR2815177B1 (en) * 2000-10-10 2005-02-11 Entrelec Sa CONNECTING SPRING AND CONNECTING BLOCK USING SUCH A SPRING
    DE10153170C1 (en) * 2001-10-27 2003-02-20 Phoenix Contact Gmbh & Co Electrical spring clamp for connecting electrical conductor with printed circuit board has bearing arm provided with integral solder pins for direct mounting on latter
    DE10238661B3 (en) * 2002-08-23 2004-02-26 Lumberg Connect Gmbh & Co. Kg Electrical contacting device, in particular for connecting a voltage source to an electronic circuit
    DE102005056325B4 (en) * 2005-11-25 2007-08-30 Phoenix Contact Gmbh & Co. Kg PCB terminal for PCB connection
    TWM335050U (en) * 2007-10-08 2008-06-21 Hon Hai Prec Ind Co Ltd Electrical connector
    EP2384788B1 (en) * 2010-05-04 2012-09-26 Sorin CRM SAS Screwless system for quick connection of a probe connector to a generator of an implantable medical device
    JP2013235681A (en) * 2012-05-07 2013-11-21 Yazaki Corp Electric wire holding structure
    US9943685B2 (en) 2015-04-23 2018-04-17 Cyberonics, Inc. Lead engagement devices and methods for electrical stimulation and/or monitoring systems
    EP3206260A1 (en) * 2016-02-15 2017-08-16 ABB Schweiz AG Electrical apparatus having a terminal for connection by pressure with a support clip guiding and limiting the resilient deformation of the contact spring
    DE102019125895B4 (en) * 2019-09-26 2021-06-10 Bjb Gmbh & Co. Kg Connection terminal with insertion funnel

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    Also Published As

    Publication number Publication date
    FR2787932A1 (en) 2000-06-30
    CA2293179C (en) 2004-07-20
    US6196883B1 (en) 2001-03-06
    FR2787932B1 (en) 2001-03-09
    DE69923651T2 (en) 2005-06-30
    EP1014495A1 (en) 2000-06-28
    DE69923651D1 (en) 2005-03-17
    BR9905928A (en) 2000-08-08
    CA2293179A1 (en) 2000-06-23
    ES2237062T3 (en) 2005-07-16

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