EP0012696A1 - Water-tight electromagnetic relay - Google Patents

Water-tight electromagnetic relay Download PDF

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Publication number
EP0012696A1
EP0012696A1 EP79401021A EP79401021A EP0012696A1 EP 0012696 A1 EP0012696 A1 EP 0012696A1 EP 79401021 A EP79401021 A EP 79401021A EP 79401021 A EP79401021 A EP 79401021A EP 0012696 A1 EP0012696 A1 EP 0012696A1
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EP
European Patent Office
Prior art keywords
relay according
housing
coil
relay
conductive
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Granted
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EP79401021A
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German (de)
French (fr)
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EP0012696B1 (en
Inventor
Raymond Bernier
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Individual
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Individual
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Priority to AT79401021T priority Critical patent/ATE1260T1/en
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Publication of EP0012696B1 publication Critical patent/EP0012696B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/026—Details concerning isolation between driving and switching circuit

Definitions

  • the present invention relates to a sealed electro-magnetic relay, in particular of small dimensions, intended in particular for telephony.
  • a "miniature" relay is known, the drive members of which are housed in a plastic casing composed of two half-shells topped with a cover. In this relay, the fixed and movable contacts are external to the half-shells and the seal against liquids is not achieved.
  • Known hermetic relays generally include a metal base on which the drive members and contacts are fixed, and a metal cover welded to the base. The electrical outlets are mounted on the base and isolated from it by means of glass beads. This solution is not favorable to an economic and automated construction.
  • the object of the present invention is to provide a tight miniature relay of very simple construction and capable of satisfactorily solving the abovementioned problems.
  • the sealed electromagnetic relay comprises in a multi-sided housing, motor members comprising in particular a coil and a magnetic circuit for actuating at least one movable conductive blade cooperating with fixed contacts, and output connections projecting from said housing . It is characterized in that at least one of the faces of the housing comprises a cheek embedded in said housing, conductive bars being overmolded in said cheek and opening on the one hand inside the housing to form the contacts and d on the other hand outside the housing to form part of the aforementioned connections.
  • a perfectly sealed housing is thus obtained, in particular thanks to a subsequent welding of the cheek.
  • the outputs of the conductive bars are also perfectly sealed, due to their overmoulding in the cheek.
  • the aforementioned conductive bars are arched within the overmolding in the cheek to open out inside the housing perpendicular to said cheek.
  • the ends of the conductive bars opening into the interior of the housing are curved, their convexity being directed towards the movable conductive strip, so as to facilitate contact with this strip.
  • the aforementioned conductive bars are doubly arched at their outlet from the housing to come into alignment with connection terminals of the relay coil.
  • the relay coil is overmolded in the housing, 'together with the magnetic circuit, in a mass of substantially parallelipiped insulating material serving as a support for this magnetic circuit which is L-shaped and whose two branches are supported on two sides of the coil overmolding.
  • a first branch of the magnetic circuit is transverse to the axis of the coil and carries a magnetic core coaxial with the coil and a second branch of said circuit extends parallel to the coil to the end of the latter.
  • the relay comprises an armature sensitive to the action of the coil for actuating the conductive blade.
  • This armature is articulated around an axis substantially coinciding with the end of the second branch of the magnetic circuit and comprises a pusher arm of non-magnetic material which extends along said second branch.
  • This non-magnetic material avoids any loss of flux as it usually occurs with magnetic materials.
  • this material has a certain electricity to exert a spring effect on the movable conductive blades and more surely ensure contact.
  • the push arm has a bent branch in which a magnetic plate is molded.
  • the actuating frame normally having to have a bend, this bend is located in the non-magnetic part constituting the pusher arm, and is obtained by molding, which avoids having to bend a fragile metal part.
  • the overmolding of the metal plate inside this bend ensures the electrical isolation of the plate from the moving blades located at a short distance.
  • the aforementioned armature is fixed to the cheeks by means of pivot devices, so as to obtain an excellent mechanical operation of this member.
  • each movable conductive strip comprises a partially flattened cylindrical rod, the cylindrical part of this rod constituting a mobile contact.
  • This embodiment makes it possible to obtain both sufficient flexibility of the movable blades and good cooperation with the fixed contacts.
  • each movable conductive strip is bent in a U, the cylindrical ends of this strip constituting a double contact, which considerably improves the probability of good contact.
  • the relay comprises a plastic housing formed by a belt 1 and two cheeks 2 embedded on two of the sides of the housing by means of shoulders 3 ( Figures 3 and 4).
  • a coil 4 is overmolded in the belt 1, the overmolding being substantially parallelepipedic.
  • This overmolding includes a magnetic circuit 5 in L, a first branch 6 of which extends transversely to the coil and of which a second branch 7 extends parallel to the coil up to the end of the latter.
  • a core 8, coaxial with the coil, is fixed by one end to the branch 6 of the circuit 5 and it has at its other end a pole shoe 9.
  • the coil wire is connected to output connections 11 protruding under the relay and molded into the belt 1.
  • a movable frame 12 consists of a push arm 13 made of relatively flexible plastic material and a magnetic plate 14.
  • the push arm 13 has a bent end 15 and the plate 14 is overmolded with the arm 13 inside of this elbow.
  • the arm 13 In the vicinity of the elbow 15, the arm 13 has two lateral bearings 16 cooperating with pivots 17 formed on the cheeks 2 in the vicinity of the free end of the magnetic circuit 5 (Fig. 6 and 7). These bearings are positioned so that the axis they define coincides with the ideal theoretical axis of rotation 20 (fig. 1).
  • the elbow 15 has an angle slightly greater than 90 ° and the pivots 1.7 are located so that the arm 13 comes to extend along the branch 7 of the circuit 5, the plate 14 being spaced from the opening 9.
  • each of the cheeks 2 are overmolded two conductive bars 18, 19 arched inside the overmolding to come out inside the housing perpendicular to the cheek and constitute fixed contacts 21, 22 respectively.
  • the aforementioned terminals are in two parts corresponding to different metals, which does not change the principle of bending.
  • connection lugs 23, 24 The other end of the bars 18, 19 opens at the bottom of the relay, by the edge of the cheek 2, to form connection lugs 23, 24.
  • the bars 18, 19 have a double curvature in Z so that the tabs 23, 24 are aligned with the connections 11 of the coil.
  • the result of this double curvature is a fold 25 which forms a wedge to slightly distance the relay from a printed circuit board 26 on which it is fixed.
  • the folds therefore play the role of "washing pins" after welding (fig. 5 ).
  • a third conductive bar 27 has its two ends which exit in the same way as those of the previous bars.
  • On its end 28 inside the housing is welded a movable conductive strip 29 produced from a partially flattened round wire.
  • the cylindrical part 31 of this blade is inserted between the contacts 21 and 22 suitably offset for this purpose.
  • the projecting parts 21 and 22 are curved (FIG. 4), their convexity being directed towards the blade 29.
  • the movable blade can be constituted by a round wire 129 curved in a U and flattened except at its ends 131a, 131b (FIG. 8). This duplication of contacts considerably improves the probability of a good contact.
  • connection tabs from the bars 18, 19, 27 are thinned as shown on the tab 32 ( Figure 4).
  • This arrangement makes it possible both to carry out the double bending in Z in a wide and resistant part of the conductive terminal, to provide a tab of small dimension which is easily inserted into a common orifice of a printed circuit board, and provide, along the length of the thinning, a greater spacing between the relay and the board 26 than that formed by the fold 25.
  • the fixed rest contact 21 is positioned so that the movable contact 31 comes to bear on it in the rest position of the relay (FIG. 1), that is to say when the magnetic plate 14 is not stressed.
  • the wafer 14 When the coil 4 is excited, the wafer 14 is attracted by the opening 9 and the frame 12 pivots around its lateral pivots. The push-arm 13 then lifts the blade 29, so that the movable contact 21 comes to bear on the fixed working contact 22. The angular travel of the armature 12 is provided a little greater than what would be necessary, so as to obtain good contact in the working position, the excess travel being absorbed by the elasticity of the blade 29 and of the pusher arm 13.
  • a first assembly comprises the belt 1, the coil 4 with its connections 11, and the magnetic circuit 5 with the core 8.
  • a second assembly comprises the frame 12, consisting of the push-arm 13 molded onto the wafer 14.
  • the manufacture of this part by overmolding avoids having to bend a relatively fragile metal part.
  • a third set consists of one (or two) cheek (s) 2 in which the conductive bars are molded.
  • the cheeks 2 are set in according to the arrows F (FIG. 3), then they are welded by a known method.
  • legs 23, 24 and 32 are folded in Z as indicated above, so as to put them at the same pitch as the connections 11 of the coil, for example at a pitch of 2.54 mm.
  • the relay obtained is perfectly waterproof and lends itself very well to automated manufacturing.

Abstract

Relais miniature étanche dont les organes sont logés dans un boîtier en matière plastique. Ce boîtier comporte une ceinture (1) dans les parois de laquelle le circuit magnétique (5), la bobine (4) et les connexions (11) de celle-ci sont surmoulés et une ou deux joues (2) soudées à la ceinture (1) et dans lesquelles les contacts fixes (21, 22) et les pièces (28) de fixation et d'articulation de contacts mobiles (31) sont surmoulés. Application aux relais téléphoniques.Watertight miniature relay whose organs are housed in a plastic case. This housing comprises a belt (1) in the walls of which the magnetic circuit (5), the coil (4) and the connections (11) thereof are overmolded and one or two cheeks (2) welded to the belt ( 1) and in which the fixed contacts (21, 22) and the parts (28) for fixing and articulation of mobile contacts (31) are overmolded. Application to telephone relays.

Description

La présente invention concerne un relais électro-magnétique étanche, en particulier de petites dimensions, destiné notamment à la téléphonie.The present invention relates to a sealed electro-magnetic relay, in particular of small dimensions, intended in particular for telephony.

On a utilisé différentes architectures de relais, visant à résoudre les problèmes d'encombrement et de protection des organes du relais contre la poussière et autres souces de contamination, notamment par les matières servant à l'isolement ou au collage des fils de bobinage, tout en assurant un bon isolement des parties conductrices, un fonctionnement efficace des contacts et un rendement magnétique satisfaisant. Ces divers problèmes deviennent de plus en plus critiques au fur et à mesure de la réduction de taille du relais, notamment lorsqu'il s'agit de réaliser un relais hermétique de très petite taille, dont les sorties sont par exemple aptes à coopérer avec une grille normalisée au pas de 2,54 mm (pas le plus réduit actuellement utilisé).Different relay architectures have been used, aiming to solve the problems of space and protection of the relay members against dust and other sources of contamination, in particular by the materials used for the insulation or the bonding of the winding wires, all by ensuring good insulation of the conductive parts, efficient operation of the contacts and satisfactory magnetic efficiency. These various problems become more and more critical as the size of the relay is reduced, in particular when it is a question of producing a very small hermetic relay, the outputs of which are, for example, capable of cooperating with a standard grid 2.54 mm pitch (the smallest pitch currently used).

On connaît un relais "miniature" dont les organes moteurs sont logés dans un boîtier en matière plastique composé de deux demi-coquilles coiffées d'un couvercle. Dans ce relais, les contacts fixes et mobiles sont extérieurs aux demi-coquilles et l'étanchéité vis-à-vis des liquides n'est pas réalisée. Les relais hermétiques connus comprennent généralement une embase métallique sur laquelle sont fixés les organes moteurs et les contacts, et d'un couvercle métallique soudé à l'embase. Les sorties électriques sont montées sur l'embase et isolées de celle-ci au moyen de perles de verre. Cette solution n'est pas favorable à une construction économique et automatisée.A "miniature" relay is known, the drive members of which are housed in a plastic casing composed of two half-shells topped with a cover. In this relay, the fixed and movable contacts are external to the half-shells and the seal against liquids is not achieved. Known hermetic relays generally include a metal base on which the drive members and contacts are fixed, and a metal cover welded to the base. The electrical outlets are mounted on the base and isolated from it by means of glass beads. This solution is not favorable to an economic and automated construction.

Il faut noter que l'application de plus en plus fréquentes des techniques de soudage " à la vague" des relais sur des cartes de circuits imprimés rend impérative l'étanchéité du relais vis-à-vis du flux de soudage et du liquide de lavage.It should be noted that the increasingly frequent application of "wave" welding techniques of relays on printed circuit boards makes imperative to seal the relay with respect to the welding flux and the washing liquid.

Le but de la présente invention est de réaliser un relais miniature étanche de construction très simple et apte à résoudre de manière satisfaisante les problèmes susvisés.The object of the present invention is to provide a tight miniature relay of very simple construction and capable of satisfactorily solving the abovementioned problems.

Suivant l'invention, le relais électromagnétique étanche comprend dans un boîtier multifaces, des organes moteurs comprenant notamment une bobine et un circuit magnétique pour actionner au moins une lame conductrice mobile coopérant avec des contacts fixes, et des connexions de sortie faisant saillie hors dudit boîtier. Il est caractérisé en ce qu'au moins l'une des faces du boîtier comprend une joue encastrée dans ledit boîtier, des barres conductrices étant surmoulées dans ladite joue et débouchant d'une part à l'intérieur du boîtier pour constituer les contacts et d'autre part à l'extérieur du boîtier pour constituer une partie des connexions précitées.According to the invention, the sealed electromagnetic relay comprises in a multi-sided housing, motor members comprising in particular a coil and a magnetic circuit for actuating at least one movable conductive blade cooperating with fixed contacts, and output connections projecting from said housing . It is characterized in that at least one of the faces of the housing comprises a cheek embedded in said housing, conductive bars being overmolded in said cheek and opening on the one hand inside the housing to form the contacts and d on the other hand outside the housing to form part of the aforementioned connections.

On obtient ainsi un boîtier parfaitement étanche, notamment grâce à un soudage ultérieur de la joue. Les sorties des barres conductrices sont également parfaitement étanches, en raison de leur surmoulage dans la joue.A perfectly sealed housing is thus obtained, in particular thanks to a subsequent welding of the cheek. The outputs of the conductive bars are also perfectly sealed, due to their overmoulding in the cheek.

Suivant une réalisation préférée de l'invention, les barres conductrices précitées sont cambrées au sein du surmoulage dans la joue pour déboucher à l'intérieur du boîtier perpendiculairement à ladite joue.According to a preferred embodiment of the invention, the aforementioned conductive bars are arched within the overmolding in the cheek to open out inside the housing perpendicular to said cheek.

Les extrémités des barres venant en saillie à l'intérieur du boîtier constituent les contacts fixes. D'autre part, ce cambrage interne à la joue empêche tout glissement longitudinal accidentel de barres conductrices après surmoulage.The ends of the bars projecting inside the housing constitute the fixed contacts. On the other hand, this internal arching in the cheek prevents any accidental longitudinal sliding of the conducting bars after overmolding.

De préférence, les extrémités des barres conductrices débouchant à l'intérieur du boîtier sont incurvées, leur convexité étant dirigée vers la lame conductrice mobile , de manière à faciliter le contact avec cette lame.Preferably, the ends of the conductive bars opening into the interior of the housing are curved, their convexity being directed towards the movable conductive strip, so as to facilitate contact with this strip.

Suivant une réalisation avantageuse de l'invention, les barres conductrices précitées sont doublement cambrées à leur sortie hors du boîtier pour venir s'aligner avec des bornes de connexion de la bobine du relais.According to an advantageous embodiment of the invention, the aforementioned conductive bars are doubly arched at their outlet from the housing to come into alignment with connection terminals of the relay coil.

L'ensemble des connexions du relais peut donc venir s'insérer dans le quadrillage normalisé d'une planche de circuit imprimé. En outre, ce repli en Z ménage, sous le boîtier du relais, l'équivalent d'une cale d'épaisseur qui éloigne le boîtier de la planche et joue le rôle d'un pion de lavage.All of the relay connections can therefore be inserted into the standardized grid of a printed circuit board. In addition, this Z-shaped fold saves, under the relay box, the equivalent of a shim which moves the box away from the board and plays the role of a washing pin.

Suivant une réalisation préférée de l'invention, la bobine du relais est surmoulée dans le boîtier, 'ensemble avec le circuit magnétique, dans une masse de matière isolante sensiblement parallélipipédique servant de support à ce circuit magnétique qui est en L et dont les deux branches s'appuient sur deux faces du surmoulage de la bobine.According to a preferred embodiment of the invention, the relay coil is overmolded in the housing, 'together with the magnetic circuit, in a mass of substantially parallelipiped insulating material serving as a support for this magnetic circuit which is L-shaped and whose two branches are supported on two sides of the coil overmolding.

Une première branche du circuit magnétique est transversale à l'axe de la bobine et porte un noyau magnétique coaxial à la bobine et une seconde branche dudit circuit s'étend parallèlement à la bobine jusqu'à l'extrémité de celle-ci.A first branch of the magnetic circuit is transverse to the axis of the coil and carries a magnetic core coaxial with the coil and a second branch of said circuit extends parallel to the coil to the end of the latter.

Ces dispositions assurent une fixation et une protection étanche parfaite de la bobine, en même temps qu'une excellente fixation du circuit magnétique.These provisions provide perfect sealing and protection of the coil, as well as excellent fixing of the magnetic circuit.

Suivant une réalisation perfectionnée de l'invention, le relais comprend une armature sensible à l'action de la bobine pour actionner la lame conductrice.Cette armature est articulée autour d'un axe coïncidant sensiblement avec l'extrémité de la seconde branche du circuit magnétique et comprend un bras-poussoir en matériau non magnétique qui s'étend le long de ladite seconde branche.According to an improved embodiment of the invention, the relay comprises an armature sensitive to the action of the coil for actuating the conductive blade. This armature is articulated around an axis substantially coinciding with the end of the second branch of the magnetic circuit and comprises a pusher arm of non-magnetic material which extends along said second branch.

Ce matériau non magnétique évite toute perte de flux comme il s'en produit habituellement avec les matériaux magnétiques.This non-magnetic material avoids any loss of flux as it usually occurs with magnetic materials.

De plus, ce matériau présente une certaine électricité pour exercer un effet de ressort sur les lames conductrices mobiles et assurer plus sûrement le contact.In addition, this material has a certain electricity to exert a spring effect on the movable conductive blades and more surely ensure contact.

De préférence le bras-poussoir comporte une branche coudée dans laquelle est surmoulée une plaquette magnétique.Preferably, the push arm has a bent branch in which a magnetic plate is molded.

L'armature d'actionnement devant normalement présenter un coude, ce coude est situé dans la partie non-magnétique constituant le bras-poussoir, et est obtenu par moulage, ce qui évite d'avoir à plier une pièce métallique fragile. En outre, le surmoulage de la plaquette métallique à l'intérieur de ce coude assure l'isolement électrique de la plaquette vis-à-vis des lames mobiles situées à faible distance.The actuating frame normally having to have a bend, this bend is located in the non-magnetic part constituting the pusher arm, and is obtained by molding, which avoids having to bend a fragile metal part. In addition, the overmolding of the metal plate inside this bend ensures the electrical isolation of the plate from the moving blades located at a short distance.

Suivant une réalisation perfectionnée de l'invention, l'armature précitée est fixée sur les joues par l'intermédiaire de dispositifs à pivot, de manière à obtenir un fonctionnement mécanique excellent de cet organe.According to an improved embodiment of the invention, the aforementioned armature is fixed to the cheeks by means of pivot devices, so as to obtain an excellent mechanical operation of this member.

Suivant un autre perfectionnement de l'invention, chaque lame conductrice mobile comprend une tige cylindrique partiellement aplatie, la partie cylindrique de cette tige constituant un contact mobile.According to another improvement of the invention, each movable conductive strip comprises a partially flattened cylindrical rod, the cylindrical part of this rod constituting a mobile contact.

Cette réalisation permet d'obtenir à la fois une souplesse suffisante des lames mobiles et une bonne coopération avec les contacts fixes.This embodiment makes it possible to obtain both sufficient flexibility of the movable blades and good cooperation with the fixed contacts.

L'invention prévoit encore que chaque lame conductrice mobile soit pliée en U, les extrémités cylindriques de cette lame constituant un contact double, ce qui améliore considérablement la probabilité d'un bon contact.The invention also provides that each movable conductive strip is bent in a U, the cylindrical ends of this strip constituting a double contact, which considerably improves the probability of good contact.

D'autres particularités et avantages de l'invention ressortiront encore de la description détaillée qui va suivre.Other features and advantages of the invention will emerge from the detailed description which follows.

Aux dessins annexés, donnés à titre d'exemple non limitatif:

  • la figure 1 est une vue en coupe longitudinale d'un relais conforme à l'invention,
  • - la figure 2 est une vue en coupe suivant II-II de la figure 1, les joues étant supposées enlevées,
  • - la figure 3 est une vue en coupe suivant III-III de la figure 1, en cours de fabrication, à l'encastrement des joues,
  • - la figure 4 est une vue en perspective d'une joue avec son équipement complet,
  • - la figure 5 est une vue en coupe partielle suivant V-V de la figure 1,
  • - la figure 6 est une vue éclatée, en coupe suivant VI-VI de la figure 1,
  • - la figure 7 est une vue en coupe suivant VII-VII de la figure 6,
  • - la figure 8 est une vue en perspective d'une réalisation particulière d'une lame mobile,
  • - la figure 9 est une vue en perspective du relais, avec arrachement partiel.
In the accompanying drawings, given by way of nonlimiting example:
  • FIG. 1 is a view in longitudinal section of a relay according to the invention,
  • FIG. 2 is a sectional view along II-II of FIG. 1, the cheeks being assumed to be removed,
  • FIG. 3 is a sectional view along III-III of FIG. 1, during manufacture, when the cheeks are embedded,
  • FIG. 4 is a perspective view of a cheek with its complete equipment,
  • FIG. 5 is a partial sectional view along VV of FIG. 1,
  • FIG. 6 is an exploded view, in section along VI-VI of FIG. 1,
  • FIG. 7 is a sectional view along VII-VII of FIG. 6,
  • FIG. 8 is a perspective view of a particular embodiment of a movable blade,
  • - Figure 9 is a perspective view of the relay, partially cut away.

En référence aux figures 1 à 5, le relais comprend un boîtier en matière plastique formé d'une ceinture 1 et de deux joues 2 encastrées sur deux des faces du boîtier par l'intermédiaire d'épaulements 3 (figures 3 et 4).Referring to Figures 1 to 5, the relay comprises a plastic housing formed by a belt 1 and two cheeks 2 embedded on two of the sides of the housing by means of shoulders 3 (Figures 3 and 4).

Une bobine 4 est surmoulées dans la ceinture 1, le surmoulage étant sensiblement parallélépipédique. Ce surmoulage inclut un circuit magnétique 5 en L dont une première branche 6 s'étend transversalement à la bobine et dont une seconde branche 7 s'étend parallèlement à la bobine jusqu'à l'extrémité de celle-ci.A coil 4 is overmolded in the belt 1, the overmolding being substantially parallelepipedic. This overmolding includes a magnetic circuit 5 in L, a first branch 6 of which extends transversely to the coil and of which a second branch 7 extends parallel to the coil up to the end of the latter.

Un noyau 8, coaxial à la bobine, est fixé par une extrémité à la branche 6 du circuit 5 et il présente à son autre extrémité un épanouissement polaire 9.A core 8, coaxial with the coil, is fixed by one end to the branch 6 of the circuit 5 and it has at its other end a pole shoe 9.

Le fil de la bobine est relié à des connexions de sortie 11 faisant saillie sous le relais et surmoulées dans la ceinture 1.The coil wire is connected to output connections 11 protruding under the relay and molded into the belt 1.

L'ensemble qui vient d'être décrit, à l'exception des joues 2, est entièrement surmoulé avec la ceinture 1.The assembly which has just been described, with the exception of the cheeks 2, is entirely overmolded with the belt 1.

Une armature mobile 12 se compose d'un bras-poussoir 13 en matière plastique relativement souple et d'une plaquette magnétique 14. Le bras-poussoir 13 présente une extrémité coudée 15 et la plaquette 14 est surmoulée avec le bras 13 à l'intérieur de ce coude.A movable frame 12 consists of a push arm 13 made of relatively flexible plastic material and a magnetic plate 14. The push arm 13 has a bent end 15 and the plate 14 is overmolded with the arm 13 inside of this elbow.

Au voisinage du coude 15, le bras 13 présente deux paliers latéraux 16 coopérant avec des pivots 17 ménagés sur les joues 2 au voisinage de l'extrémité libre du circuit magnétique 5 (Fig. 6 et 7). Ces paliers sont positionnés de manière que l'axe qu'ils définissent coïncide avec l'axe théorique idéal de rotation 20 (fig. 1).In the vicinity of the elbow 15, the arm 13 has two lateral bearings 16 cooperating with pivots 17 formed on the cheeks 2 in the vicinity of the free end of the magnetic circuit 5 (Fig. 6 and 7). These bearings are positioned so that the axis they define coincides with the ideal theoretical axis of rotation 20 (fig. 1).

Le coude 15 présente un angle un peu supérieur à 90° et les pivots 1.7 sont situés de telle manière que le bras 13 vienne s'étendre le long de la branche 7 du circuit 5, la plaquette 14 étant écartée de l'épanouissement 9.The elbow 15 has an angle slightly greater than 90 ° and the pivots 1.7 are located so that the arm 13 comes to extend along the branch 7 of the circuit 5, the plate 14 being spaced from the opening 9.

Dans chacune des joues 2 sont surmoulées deux barres conductrices 18, 19 cambrées à l'intérieur du surmoulage pour venir déboucher à l'intérieur du boîtier perpendiculairement à la joue et constituer des contacts fixes 21, 22 respectivement. Dans l'exemple représenté à la figure 3, les bornes précitées sont en deux parties correspondant à des métaux différents, ce qui ne modifie pas le principe du cambrage.In each of the cheeks 2 are overmolded two conductive bars 18, 19 arched inside the overmolding to come out inside the housing perpendicular to the cheek and constitute fixed contacts 21, 22 respectively. In the example shown in Figure 3, the aforementioned terminals are in two parts corresponding to different metals, which does not change the principle of bending.

L'autre extrémité des barres 18, 19 débouche en bas du relais, par la tranche de la joue 2, pour constituer des pattes de connexion 23, 24.The other end of the bars 18, 19 opens at the bottom of the relay, by the edge of the cheek 2, to form connection lugs 23, 24.

A leur sortie de la joue, les barres 18, 19 présentent une double courbure en Z pour que les pattes 23, 24 se trouvent alignées avec les connexions 11 de la bobine . Il résulte de cette double courbure un repli 25 qui forme cale pour éloigner légèrement le relais d'une planche de circuit imprimé 26 sur laquelle il est fixé. Les replis jouent donc le rôle de "pions de lavage" après soudure.(fig. 5).At their exit from the cheek, the bars 18, 19 have a double curvature in Z so that the tabs 23, 24 are aligned with the connections 11 of the coil. The result of this double curvature is a fold 25 which forms a wedge to slightly distance the relay from a printed circuit board 26 on which it is fixed. The folds therefore play the role of "washing pins" after welding (fig. 5 ).

Une troisième barre conductrice 27 a ses deux extrémités qui sortent de la même façon que celles des barres précédentes. Sur son extrémité 28 intérieure au boîtier est soudée une lame conductrice mobile 29 réalisée à partir d'un fil rond partiellement aplati. La partie cylindrique 31 de cette lame s'intercale entre les contacts 21 et 22 convenablement décalés à cet effet. Pour obtenir un meilleur contact, les parties en saillie 21 et 22 sont incurvées (figure 4), leur convexité étant dirigée vers la lame 29.A third conductive bar 27 has its two ends which exit in the same way as those of the previous bars. On its end 28 inside the housing is welded a movable conductive strip 29 produced from a partially flattened round wire. The cylindrical part 31 of this blade is inserted between the contacts 21 and 22 suitably offset for this purpose. To obtain better contact, the projecting parts 21 and 22 are curved (FIG. 4), their convexity being directed towards the blade 29.

Suivant une variante de réalisation, la lame mobile peut être constituée par un fil rond 129 courbé en U et aplati sauf à ses extrémités 131a, 131b (figure 8). Ce dédoublement des contacts améliore considérablement la probabilité d'un bon contact.According to an alternative embodiment, the movable blade can be constituted by a round wire 129 curved in a U and flattened except at its ends 131a, 131b (FIG. 8). This duplication of contacts considerably improves the probability of a good contact.

Suivant une autre variante de réalisation de l'invention, les pattes de connexions issues des barres 18, 19, 27 sont amincies de la manière représentée sur la patte 32 (figure 4). Cette disposition permet à la fois de réaliser le double cambrage en Z dans une partie large et résistante de la borne conductrice, de ménager une patte de petite dimension venant s'insérer facilement dans un orifice courant d'une planche de circuit imprimé, et de procurer, suivant la longueur de l'amincissement, un espacement plus important entre le relais et la planche 26 que celui formé par le repli 25.According to another alternative embodiment of the invention, the connection tabs from the bars 18, 19, 27 are thinned as shown on the tab 32 (Figure 4). This arrangement makes it possible both to carry out the double bending in Z in a wide and resistant part of the conductive terminal, to provide a tab of small dimension which is easily inserted into a common orifice of a printed circuit board, and provide, along the length of the thinning, a greater spacing between the relay and the board 26 than that formed by the fold 25.

Le contact fixe de repos 21 est positionné de manière que le contact mobile 31 vienne s'appuyer sur lui en position de repos du relais (figure 1) c'est-à-dire quand la plaquette magnétique 14 n'est pas sollicitée.The fixed rest contact 21 is positioned so that the movable contact 31 comes to bear on it in the rest position of the relay (FIG. 1), that is to say when the magnetic plate 14 is not stressed.

Quand la bobine 4 est excitée, la plaquette 14 est attirée par l'épanouissement 9 et l'armature 12 pivote autour de ses pivots latéraux. Le bras-poussoir 13 soulève alors la lame 29, de sorte que le contact mobile 21 vient s'appuyer sur le contact fixe de travail 22. La course angulaire de l'armature 12 est prévue un peu supérieure à ce qui serait nécessaire, de manière à obtenir un bon contact en position de travail, l'excès de course étant absorbé par l'élasticité de la lame 29 et du bras-poussoir 13.When the coil 4 is excited, the wafer 14 is attracted by the opening 9 and the frame 12 pivots around its lateral pivots. The push-arm 13 then lifts the blade 29, so that the movable contact 21 comes to bear on the fixed working contact 22. The angular travel of the armature 12 is provided a little greater than what would be necessary, so as to obtain good contact in the working position, the excess travel being absorbed by the elasticity of the blade 29 and of the pusher arm 13.

En position de travail, aucune perte de flux ne se produit par l'intermédiaire de l'armature 12, puisque le bras-poussoir 13, situé au voisinage de la bobine, est en matériau non magnétique.In the working position, no loss of flow occurs through the frame 12, since the pusher arm 13, located in the vicinity of the coil, is made of non-magnetic material.

Malgré le voisinage de la palette 14 et du circuit électrique constitué par la lame 29, le recouvrement de cette palette par le repli coudé 15 assure un excellent isolement électrique.Despite the proximity of the pallet 14 and the electrical circuit formed by the blade 29, the covering of this pallet by the bent fold 15 provides excellent electrical insulation.

Pour fabriquer le relais, un prépare trois ensemblessurmoulés suivant la technique classique.To make the relay, a set of three overmoulded sets is prepared using the classic technique.

Un premier ensemble comprend la ceinture 1, la bobine 4 avec ses connexions 11, et le circuit magnétique 5 avec le noyau 8.A first assembly comprises the belt 1, the coil 4 with its connections 11, and the magnetic circuit 5 with the core 8.

Un second ensemble comprend l'armature 12, constituée du bras-poussoir 13 surmoulé sur la plaquette 14. La fabrication de cette pièce par surmoulage évite d'avoir à couder une pièce métallique relativement fragile.A second assembly comprises the frame 12, consisting of the push-arm 13 molded onto the wafer 14. The manufacture of this part by overmolding avoids having to bend a relatively fragile metal part.

Enfin, un troisième ensemble est constitué par une (ou deux) joue(s) 2 dans lesquelles sont surmoulées les barres conductrices.Finally, a third set consists of one (or two) cheek (s) 2 in which the conductive bars are molded.

Après avoir convenablement mis en place l'armature 12, on encastre les joues 2 suivant les flèches F (fig. 3), puis on les soude par un procédé connu.After having properly fitted the frame 12, the cheeks 2 are set in according to the arrows F (FIG. 3), then they are welded by a known method.

Enfin, on replie en Z les pattes 23, 24 et 32 comme indiqué plus haut, de manière à les mettre au même pas que les connexions 11 de la bobine, par exemple au pas de 2,54 mm.Finally, the legs 23, 24 and 32 are folded in Z as indicated above, so as to put them at the same pitch as the connections 11 of the coil, for example at a pitch of 2.54 mm.

Le relais obtenu est parfaitement étanche et se prête très bien à une fabrication automatisée.The relay obtained is perfectly waterproof and lends itself very well to automated manufacturing.

Claims (16)

1. Relais électromagnétique étanche comprenant, dans un boîtier multifaces, des organes moteurs comprenant notamment une bobine et un circuit magnétique pour actionner au moins une lame conductrice mobile coopérant avec des contacts fixes, et des connexions de sortie faisant saillie hors dudit boîtier, caractérisé en ce qu'au moins l'une des faces du boîtier comprend une joue (2) encastrée dans ledit boîtier, des barres conductrices (18, 19, 27) étant surmoulées dans ladite joue (2) et débouchant d'une part à l'intérieur du boîtier pour constituer les contacts (21, 22, 31) et d'autre part à l'extérieur du boîtier pour constituer une partie (23, 24, 34) des connexions précitées.1. Sealed electromagnetic relay comprising, in a multi-sided housing, motor members comprising in particular a coil and a magnetic circuit for actuating at least one movable conductive blade cooperating with fixed contacts, and output connections projecting from said housing, characterized in that at least one of the faces of the housing comprises a cheek (2) embedded in said housing, conductive bars (18, 19, 27) being overmolded in said cheek (2) and opening on the one hand to the inside the housing to form the contacts (21, 22, 31) and on the other hand outside the housing to form a part (23, 24, 34) of the aforementioned connections. 2. Relais conforme à la revendication 1, caractérisé en ce que les barres conductrices (18, 19, 27) précitées sont cambrées au sein du surmoulage dans la joue (2) pour déboucher à l'intérieur du boîtier perpendiculairement à ladite joue (2).2. Relay according to claim 1, characterized in that the aforesaid conductive bars (18, 19, 27) are bent within the overmolding in the cheek (2) to open out inside the housing perpendicular to said cheek (2 ). 3. Relais conforme à la revendication 2, caractérisé en ce que les barres conductrices (18, 19) relatives aux contacts fixes (21,22) sont en deux parties assemblées au sein du surmoulage et faites de métaux différents.3. Relay according to claim 2, characterized in that the busbars (18, 19) relating to the fixed contacts (21,22) are in two parts assembled within the overmolding and made of different metals. 4. Relais conforme à l'une des revendications 2 ou 3, caractérisé en ce que les extrémités des barres conductrices (18, 19) débouchant à l'intérieur du boîtier et relatives aux contacts fixes sont incurvées, leur convexité étant dirigée vers la lame conductrice mobile (29).4. Relay according to one of claims 2 or 3, characterized in that the ends of the conductive bars (18, 19) opening into the interior of the housing and relating to the fixed contacts are curved, their convexity being directed towards the blade mobile conductor (29). 5. Relais conforme à l'une des revendications 2 à 4, caractérisé en ce que la barre conductrice (27) relative au contact mobile (31) sert, par sa partie (28) débouchant dans le boîtier, de support à la barre conductrice mobile (29).5. Relay according to one of claims 2 to 4, characterized in that the conductive bar (27) relating to the movable contact (31) serves, by its part (28) opening into the housing, to support the conductive bar mobile (29). 6. Relais conforme à l'une des revendications 1 à 5, caractérisé en ce que les barres conductrices (18, 19, 27) précitées sont doublement cambrées à leur sortie hors du boîtier pour venir s'aligner avec des bornes de connexion (11) de la bobine (4) du relais.6. Relay according to one of claims 1 to 5, characterized in that the aforesaid conductive bars (18, 19, 27) are doubly arched at their outlet from the housing to come into alignment with connection terminals (11 ) of the relay coil (4). 7. Relais conforme à l'une des revendications 1 à 6, caractérisé en ce que la bobine (4) du relais est surmoulée dans le boîtier ensemble avec le circuit magnétique (5).7. Relay according to one of claims 1 to 6, characterized in that the coil (4) of the relay is molded into the housing together with the magnetic circuit (5). 8. Relais conforme à la revendication 7, caractérisé en ce que le circuit magnétique (5) est en L, deux branches du L s'appuyant sur deux faces du surmoulage de la bobine (4).8. Relay according to claim 7, characterized in that the magnetic circuit (5) is in L, two branches of L resting on two faces of the overmolding of the coil (4). 9. Relais conforme à la revendication 8, caractérisé en ce qu'une première branche (6) du circuit magnétique (5) est transversale à l'axe de la bobine (4) et porte un noyau magnétique (8) coaxial à la bobine (4), une seconde branche (7) dudit circuit (5) s'étendant parallèlement à la bobine (4) jusqu'à l'extrémité de celle-ci.9. Relay according to claim 8, characterized in that a first branch (6) of the magnetic circuit (5) is transverse to the axis of the coil (4) and carries a magnetic core (8) coaxial with the coil (4), a second branch (7) of said circuit (5) extending parallel to the coil (4) up to the end of the latter. 10. Relais conforme à la revendication 9, caractérisé en ce qu'il comprend une armature (12) sensible à l'action de la bobine (4) pour actionner la lame conductrice (29), cette armature (12) étant articulée autour d'un axe théorique (20) coïncidant sensiblement avec l'extrémité de la seconde branche (7) du circuit magnétique (5) et comprenant au moins un bras-poussoir (13) en matériau non magnétique qui s'étend le long de ladite secunde branche (7).10. Relay according to claim 9, characterized in that it comprises an armature (12) sensitive to the action of the coil (4) for actuating the conductive blade (29), this armature (12) being articulated around '' a theoretical axis (20) substantially coinciding with the end of the second branch (7) of the magnetic circuit (5) and comprising at least one push arm (13) of non-magnetic material which extends along said second branch (7). 11. Relais conforme à la revendication 10, caractérisé en ce que le bras-poussoir (13) est en matériau élastique.11. Relay according to claim 10, characterized in that the push arm (13) is made of elastic material. 12. Relais conforme à l'une des revendications 10 ou 11, caractérisé en ce que le bras-poussoir (13) comporte une branche coudée (15) dans laquelle est surmoulée une plaquette magnétique (14).12. Relay according to one of claims 10 or 11, characterized in that the push-arm (13) comprises a bent branch (15) in which is molded a magnetic plate (14). 13. Relais conforme à l'une des revendications 10 à 12, caractérisé en ce que l'armature (12) précitée est fixée sur les joues (2) par l'intermédiaire de dispositifs à pivot (16, 17).13. Relay according to one of claims 10 to 12, characterized in that the aforementioned armature (12) is fixed to the cheeks (2) by means of pivot devices (16, 17). 14. Relais conforme à la revendication 13, caractérisé en ce que les dispositifs à pivot (16, 17) sont positionnés de manière que leur axe commun coïncide avec l'axe théorique (20) précité.14. Relay according to claim 13, characterized in that the pivot devices (16, 17) are positioned so that their common axis coincides with the aforementioned theoretical axis (20). 15. Relais conforme à l'une des revendications 1 à 14, caractérisé en ce que chaque lame conductrice mobile (29) comprend une tige cylindrique partiellement aplatie, la partie cylindrique de cette tige constituant un contact mobile (31).15. Relay according to one of claims 1 to 14, characterized in that each movable conductive strip (29) comprises a partially flattened cylindrical rod, the cylindrical part of this rod constituting a mobile contact (31). 16. Relais conforme à la revendication 15, caractérisé en ce que chaque lame conductrice mobile (129) est pliée en U, les extrémités cylindriques (131a, 131b) de cette lame constituant un contact mobile.16. Relay according to claim 15, characterized in that each movable conductive strip (129) is folded in a U, the cylindrical ends (131a, 131b) of this strip constituting a movable contact.
EP79401021A 1978-12-15 1979-12-14 Water-tight electromagnetic relay Expired EP0012696B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79401021T ATE1260T1 (en) 1978-12-15 1979-12-14 WATERPROOF ELECTROMAGNETIC RELAY.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7836378A FR2444335A1 (en) 1978-12-15 1978-12-15 WATERPROOF ELECTRIC-MAGNETIC RELAY OF VERY SMALL DIMENSIONS
FR7836378 1978-12-15

Publications (2)

Publication Number Publication Date
EP0012696A1 true EP0012696A1 (en) 1980-06-25
EP0012696B1 EP0012696B1 (en) 1982-06-23

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ID=9216535

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79401021A Expired EP0012696B1 (en) 1978-12-15 1979-12-14 Water-tight electromagnetic relay

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Country Link
US (1) US4321569A (en)
EP (1) EP0012696B1 (en)
JP (1) JPS5583119A (en)
AT (1) ATE1260T1 (en)
BE (1) BE880255A (en)
CA (1) CA1139342A (en)
CH (1) CH634951A5 (en)
DE (2) DE2950199C2 (en)
DK (1) DK534379A (en)
ES (1) ES486896A1 (en)
FR (1) FR2444335A1 (en)
GB (1) GB2040578B (en)
IT (1) IT1120213B (en)
PT (1) PT70546A (en)

Cited By (6)

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Publication number Priority date Publication date Assignee Title
EP0075393A1 (en) * 1981-09-22 1983-03-30 International Standard Electric Corporation Electromagnetic relay and method of making it
EP0089553A2 (en) * 1982-03-22 1983-09-28 Siemens Aktiengesellschaft Contactor composed of parts which fit into each other
GB2139423A (en) * 1983-02-28 1984-11-07 Matsushita Electric Works Ltd Electromagnetic relay
FR2622739A1 (en) * 1987-11-03 1989-05-05 Serd Soc Et Realisa Disjonct MAGNETIC TRIGGER AND METHOD OF MANUFACTURING
EP0336445A2 (en) * 1988-04-07 1989-10-11 OMRON Corporation Electromagnetic relay
WO1991015866A1 (en) * 1990-04-09 1991-10-17 Siemens Aktiengesellschaft Electromagnetic relay and process for manufacturing it

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JPS5678784A (en) * 1979-11-29 1981-06-27 Mitsubishi Electric Corp Smalllsized elevator device and its installing method
DE3176825D1 (en) * 1980-09-01 1988-09-01 Fujitsu Ltd Electromagnetic relay and method of manufacturing the same
JPS57118927A (en) * 1981-01-09 1982-07-24 Nissan Motor Co Ltd Four-wheel drive car
JPS57118928A (en) * 1981-01-09 1982-07-24 Nissan Motor Co Ltd Four-wheel drive car
JPS5863523A (en) * 1981-10-12 1983-04-15 Nissan Motor Co Ltd Four-wheel drive car
DE3202580C2 (en) * 1982-01-27 1986-10-30 Siemens AG, 1000 Berlin und 8000 München Relay with bridge contact arrangement and method for their manufacture
CA1237915A (en) * 1984-04-14 1988-06-14 Kiyokazu Okubo Four-wheel drive system
DE8438436U1 (en) * 1984-04-18 1987-10-22 Hengstler Bauelemente Gmbh, 7209 Wehingen, De
DE59900886D1 (en) * 1998-07-27 2002-03-28 Siemens Ag SWITCHGEAR WITH A HOUSING LOWER PART AS A BUILDING UNIT AND RELATED PRODUCTION METHOD
US20170129353A1 (en) * 2015-11-05 2017-05-11 Nexans Power supply assembly intended to recharge electric batteries for electric motor vehicles

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GB822652A (en) * 1957-03-01 1959-10-28 Telephone Mfg Co Ltd Improvements in or relating to electromagnetic relays
US3295078A (en) * 1964-12-16 1966-12-27 Guardian Electric Mfg Company Relay
FR2086307A1 (en) * 1970-04-24 1971-12-31 Gruner Kg Relais Fabrik
FR2181822A1 (en) * 1972-03-17 1973-12-07 Int Standard Electric Corp
FR2294534A1 (en) * 1974-12-13 1976-07-09 Matsushita Electric Works Ltd ELECTROMAGNETIC RELAY
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0075393A1 (en) * 1981-09-22 1983-03-30 International Standard Electric Corporation Electromagnetic relay and method of making it
EP0089553A2 (en) * 1982-03-22 1983-09-28 Siemens Aktiengesellschaft Contactor composed of parts which fit into each other
EP0089553A3 (en) * 1982-03-22 1985-07-03 Siemens Aktiengesellschaft Contactor composed of parts which fit into each other
GB2139423A (en) * 1983-02-28 1984-11-07 Matsushita Electric Works Ltd Electromagnetic relay
FR2622739A1 (en) * 1987-11-03 1989-05-05 Serd Soc Et Realisa Disjonct MAGNETIC TRIGGER AND METHOD OF MANUFACTURING
EP0336445A2 (en) * 1988-04-07 1989-10-11 OMRON Corporation Electromagnetic relay
EP0336445A3 (en) * 1988-04-07 1991-07-10 OMRON Corporation Electromagnetic relay
WO1991015866A1 (en) * 1990-04-09 1991-10-17 Siemens Aktiengesellschaft Electromagnetic relay and process for manufacturing it
US5289145A (en) * 1990-04-09 1994-02-22 Siemens Aktiengesellschaft Electromagnetic relay and a method for its production

Also Published As

Publication number Publication date
ATE1260T1 (en) 1982-07-15
IT7951068A0 (en) 1979-12-12
DE2950199A1 (en) 1980-06-26
DE2950199C2 (en) 1986-08-07
ES486896A1 (en) 1980-06-16
FR2444335A1 (en) 1980-07-11
CA1139342A (en) 1983-01-11
IT1120213B (en) 1986-03-19
FR2444335B1 (en) 1981-08-14
JPS5583119A (en) 1980-06-23
DE7935129U1 (en) 1982-07-15
EP0012696B1 (en) 1982-06-23
PT70546A (en) 1980-01-01
US4321569A (en) 1982-03-23
DK534379A (en) 1980-06-16
CH634951A5 (en) 1983-02-28
BE880255A (en) 1980-03-17
GB2040578A (en) 1980-08-28
GB2040578B (en) 1983-04-13

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