EP0302070B1 - Miniature switch with sudden break - Google Patents

Miniature switch with sudden break Download PDF

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Publication number
EP0302070B1
EP0302070B1 EP87902544A EP87902544A EP0302070B1 EP 0302070 B1 EP0302070 B1 EP 0302070B1 EP 87902544 A EP87902544 A EP 87902544A EP 87902544 A EP87902544 A EP 87902544A EP 0302070 B1 EP0302070 B1 EP 0302070B1
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EP
European Patent Office
Prior art keywords
common terminal
blade
switch
force
fixed
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EP87902544A
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German (de)
French (fr)
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EP0302070A1 (en
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Roger Vialy
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Individual
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Individual
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/14—Operating parts, e.g. push-button
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/36—Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/14—Operating parts, e.g. push-button
    • H01H13/18—Operating parts, e.g. push-button adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift

Definitions

  • the present invention relates to miniature snap switches. They include, inside a molded plastic case, a tilting blade mechanism actuated by an external pusher, this blade, pivoting on a common terminal, provides electrical continuity alternately between the common terminal and two separate terminals.
  • This device comprises, an elastic movable blade 18 fig. 3 articulated in the notches 12 and 13 formed on either side in the common terminal 14 fig.1.
  • the position of these notches and the length of the arms 15 and 16 of the blade 18, determine an elastic deformation of these arms, thus creating a reaction force on the terminal 10.
  • a spring 19 placed under the blade 18 is opposed to the displacement pusher 9; fig. 2 shows that the downward movement of the pusher causes the moving contact 8 to pass abruptly from 10 to 11, when the arms 17 of the blade 18 exceed the notch 12. Electrical continuity is then ensured between the common terminal 14 and the terminal 11.
  • the contact force of 8 is then a result of the tension of the arms 15 and 16 of the moving blade.
  • the action force F on the pusher is usually represented as a function of its travel C by a diagram.
  • Fig. 4 shows the diagram corresponding to the type of switch shown on board 1/3
  • the action force on the pusher increases from 20 to 21, tipping point of the movable blade when the arms 17 exceed the notch 12, the movable contact 8 suddenly goes from 10 to 11.
  • the force of action drops at point 22, because it is reduced by the force necessary to tension the arm 16. From 22 to 23 the force of action increases again regularly, until that the spring 19 is fully compressed as shown in fig. 2.
  • the action force is increased at 25 by the tension of the arm 16 then decreases again until 20.
  • the displacement from 20 to 27 is usually called the approach race, from 27 to 26 after the race, from 27 to 28 the differential race.
  • This diagram shows a relatively large increase in the force of action, which is not favorable for sensitive switches where a low operating force is sought.
  • any significant variation in the control forces results in increased fatigue of the mechanical components, therefore a decrease in the longevity of the product.
  • the object of the invention is to create a snap-action switch having a large adaptability, a relatively constant operating force, a low manufacturing cost, a limited number of parts particularly suitable for automated manufacturing and assembly, and good electrical, mechanical and reliability performance.
  • the invention shown in plate 2/3 fig. 5, 6, and 7 in positions comparable to those of the board 1/3 consists of a movable blade 38, articulated in the notch 32 of a common inclined terminal 34, by its pivoting part 36.
  • This blade is held in tension by a leaf-shaped spring 35, fixed by various known means to the inclined terminal 34, and the other free end of which, shouldered, is engaged in a slot 33 in the movable blade 38.
  • This configuration has the particularity , the progressive detachment of the leaf spring 35 from the inclined terminal 34, as the plunger 39 is pressed in. This has the effect of varying the fictitious installation point of the leaf spring 35 on the inclined terminal 34, which corresponds to their point of tangency , until tilting 8 on contact 31.
  • this leaf spring is to provide a relatively constant tensile force, since its active length increases at the same time as its bending. As a result, the operating force on the pusher varies little. This ability will be better understood on examining the diagram in FIG. 8. Operation takes place within a small range of force variation. Indeed, the variation of the force of action in its extreme values: minimum 49 and 44, maximum 41 and 43, is proportionally smaller than in the case cited in fig. 4.
  • the shape and dimensions of the leaf spring and of the movable blade, their physical characteristics, determine the values of the reaction force on the pusher and of the traction force on the movable blade, on which the bearing forces on the contacts.
  • the inclination of the common terminal determines the variation of the operating force. The choice of these characteristics will be made according to the need.
  • the inclination can vary from 35 ° to 75 °, the large angles favor the constancy of the maneuvering force and vice versa.
  • the invention by its construction, allows high intensity currents.
  • the central part 36 of the movable blade 38 which is the main conductor of the current, has no spring function. Consequently, the blade may have a sufficient cross section, and be made of a metal having good electrical conductivity.
  • the leaf spring 35 will be formed from a metal having good mechanical characteristics and more particularly those of resistance to fatigue, even to the detriment of its electrical conductivity, since it is not the main conductor of the electric current.
  • the invention provides ease of mounting the device.
  • the movable blade 38, the common terminal 34 and the leaf spring 35 which is integral with it, constitute a homogeneous one-piece sub-assembly. Indeed we can see in fig. 7, that the leaf spring 35, by its tension, pulls the movable blade 38 in the notch 32 and maintains it in the represented position by pressing against an edge formed in the movable blade 38. the free end of the spring blade 35, engaged up to its shoulders in the lumen 33 of the movable blade 38, forms therewith a flexible articulation.
  • This sub-assembly can easily be introduced into the switch housing manually, or with automatic means.
  • the invention also relates to construction features which make it possible, at a lower cost, to solve certain problems linked to the assembly of the product as well as to the mounting of its accessories. Plate 3/3, fig. 9, 10, 11 and 12 explain these characteristics in detail.
  • Fig. 9 shows, by way of example, a miniature switch equipped with a lever 51 with roller 61. This lever pivots about an axis 60 which can, at will, be placed in the other holes 52 of the housing assembly. cover, in order to be able to vary the operating force and the stroke of the lever.
  • Fig. 12 is a section showing the same axis 60 also used as the pivot axis of the roller 61.
  • This axis which is molded in a suitable thermoplastic material with a single press stroke, thanks to the accordion shape of its central part, can , due to its elasticity, be sufficiently reduced in length, to penetrate the yoke formed by the cover-box or by the lever. Placed in alignment with the concordant holes of the housing or the lever yoke, it returns to its initial dimension to serve as a pivot for the lever 51 and the roller 61.
  • the characteristic of this axis is that it can be dismantled and reassembled without deterioration, to change or replace the lever or the roller, manually with simple means.
  • the production of the invention does not pose any particular problem for the industry specializing in the manufacture of this type of product.
  • the leaf spring 35 must be assembled on the common terminal 34 so that: the two parts are properly aligned, the leaf spring can be detached from the common terminal and the electrical connection between the two parts is perfect. It is recommended to bend the end of the leaf spring at around 45 °, P fig. 7, in order to facilitate the introduction of the leaf spring into the slot 33.

Abstract

Switch of the tilting blade type wherein the spring blade (35) provides for the tension of the moving blade (38) and the return of the pusher (39); under the action of the pusher (39) the spring blade (35) separates progressively from the inclined terminal (34); the inclination value is given for products in compliance with standard (DIN 41635, shape A); the closure system of the case comprises flanges which retain the cover; the shaft of the accessories is cast in a single operation.

Description

La présente invention concerne les commutateurs miniatures à rupture brusque. Ils comprennent, à l'intérieur d'un boitier en matière plastique moulée, un mécanisme à lame basculante actionnée par un poussoir extérieur, cette lame, pivotant sur une borne commune, assure la continuité électrique alternativement entre la borne commune et deux bornes distinctes.The present invention relates to miniature snap switches. They include, inside a molded plastic case, a tilting blade mechanism actuated by an external pusher, this blade, pivoting on a common terminal, provides electrical continuity alternately between the common terminal and two separate terminals.

Les principes de fonctionnement de ces appareils sont bien connus et décrits dans de nombreux brevets. On peut citer à titre d'exemple, les brevets français suivants : FR-A 1 182 508, FR-A-2 072 376, FR-A-2 472 827 FR-A-2 531 262.The operating principles of these devices are well known and described in numerous patents. By way of example, mention may be made of the following French patents: FR-A 1,182,508, FR-A-2,072,376, FR-A-2,472,827 FR-A-2,531,262.

Leur utilisation comme composants d'automatismes doit satisfaire aux conditions d'agrément des normes internationales, dont en particulier : interchangeabilité, isolation électrique, fiabilité, absence de point d'équilibre, faible force de manoeuvre, fort pouvoir de coupure.Their use as automation components must meet the conditions of approval of international standards, including in particular: interchangeability, electrical insulation, reliability, absence of equilibrium point, low operating force, high breaking capacity.

Le grand développement du marché ayant induit une forte concurrence, les constructeurs ont été amenés à concevoir des produits du plus faible coût de revient. Pour cela, ces produits doivent comporter un nombre minimum de pièces dont les formes doivent être compatibles avec les moyens automatiques de fabrication de montage et de contrôle.The great development of the market having induced strong competition, manufacturers were led to design products with the lowest cost price. For this, these products must include a minimum number of parts, the shapes of which must be compatible with automatic means of assembly and control manufacturing.

Un des mécanismes parmi les plus simples est décrit dans le brevet français FR-A-1 182 508 demandé le 03/09/57. Son principe qui a servi de base à plusieurs types de produits, fabriqués actuellement en très grandes quantités, est rappelé dans les figures de la planche 1/3 :One of the simplest mechanisms is described in French patent FR-A-1,182,508 applied for on 03/09/57. Its principle, which has served as the basis for several types of products, currently produced in very large quantities, is recalled in the figures on plate 1/3:

Ce dispositif comprend, une lame mobile élastique 18 fig. 3 articulée dans les encoches 12 et 13 formées de part et d'autre dans la borne commune 14 fig.1. La position de ces encoches et la longueur des bras 15 et 16 de la lame 18, déterminent une déformation élastique de ces bras, créant ainsi une force de réaction sur la borne 10. Un ressort 19 placé sous la lame 18 s'oppose au déplacement du poussoir 9; la fig. 2 montre que le déplacement du poussoir vers le bas provoque le passage brusque du contact mobile 8 de 10 en 11, lorsque les bras 17 de la lame 18 dépassent l'encoche 12. La continuité électrique est alors assurée entre la borne commune 14 et la borne 11. La force de contact de 8 est alors une résultante de la tension des bras 15 et 16 de lame mobile.This device comprises, an elastic movable blade 18 fig. 3 articulated in the notches 12 and 13 formed on either side in the common terminal 14 fig.1. The position of these notches and the length of the arms 15 and 16 of the blade 18, determine an elastic deformation of these arms, thus creating a reaction force on the terminal 10. A spring 19 placed under the blade 18 is opposed to the displacement pusher 9; fig. 2 shows that the downward movement of the pusher causes the moving contact 8 to pass abruptly from 10 to 11, when the arms 17 of the blade 18 exceed the notch 12. Electrical continuity is then ensured between the common terminal 14 and the terminal 11. The contact force of 8 is then a result of the tension of the arms 15 and 16 of the moving blade.

On représente habituellement la force d'action F sur le poussoir en fonction de sa course C par un diagramme. La fig. 4 montre le diagramme correspondant au type de commutateur représenté à la planche 1/3 La force d'action sur le poussoir augmente de 20 à 21, point de basculement de la lame mobile lorsque les bras 17 dépassent l'encoche 12, le contact mobile 8 passe brusquement de 10 en 11. La force d'action chute au point 22, car elle est diminuée de la force nécessaire à la tension du bras 16. De 22 à 23 la force d'action croît de nouveau régulièrement, jusqu'à ce que le ressort 19 soit totalement comprimé comme le montre la fig. 2. Au retour le processus s'inverse, de 23 à 24 la force d'action décroît; quand les bras 17 dépassent l'encoche 12 le contact 8 passe brusquement de 11 en 10. La force d'action est augmentée en 25 de la tension du bras 16 puis décroît de nouveau jusqu'en 20. Dans cette représentation graphique, le déplacement de 20 à 27 s'appelle habituellement la course d'approche, de 27 à 26 l'après-course, de 27 à 28 la course différentielle. Ce diagramme montre une augmentation relativement importante de la force d'action, ce qui n'est pas favorable pour les commutateurs sensibles où l'on cherche une faible force de manoeuvre. De plus, toute variation importante des forces de commande a pour conséquence une fatigue accrue des organes mécaniques, donc une diminution de la longévité du produit.The action force F on the pusher is usually represented as a function of its travel C by a diagram. Fig. 4 shows the diagram corresponding to the type of switch shown on board 1/3 The action force on the pusher increases from 20 to 21, tipping point of the movable blade when the arms 17 exceed the notch 12, the movable contact 8 suddenly goes from 10 to 11. The force of action drops at point 22, because it is reduced by the force necessary to tension the arm 16. From 22 to 23 the force of action increases again regularly, until that the spring 19 is fully compressed as shown in fig. 2. On the return the process is reversed, from 23 to 24 the force of action decreases; when the arms 17 exceed the notch 12 the contact 8 suddenly changes from 11 to 10. The action force is increased at 25 by the tension of the arm 16 then decreases again until 20. In this graphical representation, the displacement from 20 to 27 is usually called the approach race, from 27 to 26 after the race, from 27 to 28 the differential race. This diagram shows a relatively large increase in the force of action, which is not favorable for sensitive switches where a low operating force is sought. In addition, any significant variation in the control forces results in increased fatigue of the mechanical components, therefore a decrease in the longevity of the product.

La grande variété d'applications industrielles de ce type de produit demande une large souplesse d'adaptation. On devra pouvoir faire varier dans de grandes proportions ses caractéristiques.The wide variety of industrial applications for this type of product requires a wide flexibility of adaptation. We must be able to vary its characteristics in large proportions.

L'invention a pour objet de créer un commutateur à rupture brusque ayant une large capacité d'adaptation, une force de manoeuvre relativement constante, un coût de fabrication bas, un nombre limité de pièces particulièrement adaptées à la fabrication et au montage automatisés, et de bonnes performances électriques, mécaniques et de fiabilité.The object of the invention is to create a snap-action switch having a large adaptability, a relatively constant operating force, a low manufacturing cost, a limited number of parts particularly suitable for automated manufacturing and assembly, and good electrical, mechanical and reliability performance.

L'invention représentée à la planche 2/3 fig. 5, 6, et 7 dans des positions comparables à celles de la planche 1/3 se compose d'une lame mobile 38, articulée dans l'encoche 32 d'une borne commune inclinée 34, par sa partie pivotante 36. Cette lame est maintenue en tension par un ressort en forme de lame 35, fixé par divers moyens connus à la borne inclinée 34, et dont l'autre extrémité libre, épaulée, est engagée dans une lumière 33 de la lame mobile 38. Cette configuration a comme particularité, le décollement progressif du ressort-lame 35 de la borne inclinée 34, au fur et à mesure de l'enfoncement du poussoir 39. Ce qui a pour conséquence de faire varier le point d'encastrement fictif du ressort-lame 35 sur la borne inclinée 34, qui correspond à leur point de tangence, jusqu'au basculement de 8 sur le contact 31.The invention shown in plate 2/3 fig. 5, 6, and 7 in positions comparable to those of the board 1/3 consists of a movable blade 38, articulated in the notch 32 of a common inclined terminal 34, by its pivoting part 36. This blade is held in tension by a leaf-shaped spring 35, fixed by various known means to the inclined terminal 34, and the other free end of which, shouldered, is engaged in a slot 33 in the movable blade 38. This configuration has the particularity , the progressive detachment of the leaf spring 35 from the inclined terminal 34, as the plunger 39 is pressed in. This has the effect of varying the fictitious installation point of the leaf spring 35 on the inclined terminal 34, which corresponds to their point of tangency , until tilting 8 on contact 31.

La propriété caractéristique de ce ressort-lame est de fournir une force de tension relativement constante, car sa longueur active augmente en même temps que sa flexion. Il en résulte que la force de manoeuvre sur le poussoir varie peu. Cette aptitude sera mieux comprise à l'examen du diagramme de la fig. 8. Le fonctionnement s'effectue dans une petite plage de variation de forces. En effet, la variation de la force d'action dans ses valeurs extrèmes : minimales 49 et 44, maximales 41 et 43, est proportionnellement plus faible que dans le cas cité fig. 4.The characteristic property of this leaf spring is to provide a relatively constant tensile force, since its active length increases at the same time as its bending. As a result, the operating force on the pusher varies little. This ability will be better understood on examining the diagram in FIG. 8. Operation takes place within a small range of force variation. Indeed, the variation of the force of action in its extreme values: minimum 49 and 44, maximum 41 and 43, is proportionally smaller than in the case cited in fig. 4.

La forme et les dimensions du ressort-lame et de la lame mobile, leurs caractéristiques physiques, déterminent les valeurs de la force de réaction sur le poussoir et de la force de traction sur la lame mobile, dont dépendent les forces d'appui sur les contacts. L'inclinaison de la borne commune détermine la variation de la force de manoeuvre. Le choix de ces caractéristiques sera fait en fonction du besoin.The shape and dimensions of the leaf spring and of the movable blade, their physical characteristics, determine the values of the reaction force on the pusher and of the traction force on the movable blade, on which the bearing forces on the contacts. The inclination of the common terminal determines the variation of the operating force. The choice of these characteristics will be made according to the need.

Le produit représenté, à titre d'exemple, satisfait à la Norme Internationale DIN 41635, forme A, s'applique aussi bien aux commutateurs à forte intensité de courant et grand écartement de contacts. qu'aux commutateurs sensibles à faible force de manoeuvre. Dans ce cas l'inclinaison du plan de la borne commune 34, sur lequel se déroule le ressort-lame 35 , par rapport à la position moyenne de la lame mobile 38 définie par une horizontale du boitier, et comprise entre 40° et 50° angle a fig. 5. Cette valeur est optimale pour l'application considérée. Dans les autres cas, l'inclinaison peut varier de 35° à 75°, les grands angles favorisent la constance de la force de manoeuvre et inversement.The product shown, by way of example, meets the International Standard DIN 41635, form A, applies equally to switches with high current intensity and large contact gap. than sensitive switches with low operating force. In this case the inclination of the plane of the common terminal 34, on which the leaf spring 35 takes place, relative to the average position of the movable blade 38 defined by a horizontal of the case, and between 40 ° and 50 ° angle a fig. 5. This value is optimal for the application considered. In the other cases, the inclination can vary from 35 ° to 75 °, the large angles favor the constancy of the maneuvering force and vice versa.

L'invention, par sa construction, permet les courants de fortes intensités. La partie centrale 36 de la lame mobile 38, qui est le conducteur principal du courant, n'a pas de fonction ressort. En conséquence la lame peut avoir une section suffisante, et être constituée d'un métal ayant une bonne conductibilité électrique. Par contre, le ressort-lame 35 sera formé d'un métal ayant de bonnes caractéristiques mécaniques et plus particulièrement celles de résistance à la fatigue, même au détriment de sa conductibilité électrique, car il n'est pas le conducteur principal du courant électrique.The invention, by its construction, allows high intensity currents. The central part 36 of the movable blade 38, which is the main conductor of the current, has no spring function. Consequently, the blade may have a sufficient cross section, and be made of a metal having good electrical conductivity. On the other hand, the leaf spring 35 will be formed from a metal having good mechanical characteristics and more particularly those of resistance to fatigue, even to the detriment of its electrical conductivity, since it is not the main conductor of the electric current.

L'invention apporte une facilité de montage de l'appareil. La lame mobile 38, la borne commune 34 et le ressort-lame 35 qui lui est solidaire, constituent un sous-ensemble monobloc homogène. En effet on peut voir dans la fig. 7, que le ressort-lame 35, par sa tension, tire la lame mobile 38 dans l'encoche 32 et la maintient dans la position réprésentée en s'appuyant contre une arête formée dans la lame mobile 38. l'extrémité libre du ressort-lame 35, engagée jusqu'à ses épaulements dans la lumière 33 de la lame mobile 38, forme avec celui-ci une articulation souple. Ce sous-ensemble peut s'introduire facilement dans le boitier du commutateur manuellement, ou avec des moyens automatiques. Le montage ultérieur du contact fixe 30 et du poussoir 39, dégage l'arête de la lame mobile 38 du ressort-lame 35 et ainsi arme la lame mobile 38 pour assurer la force de contact nécessaire. Ce système de sous-assemblage permet un auto-centrage de la lame mobile 38 sur la borne commune 34 par la tension du ressortlame 35. De ce fait, la largeur de la lame-mobile 38 peut-être maximale, ce qui est favorable pour les caractéristiques mécaniques et électriques du produit.The invention provides ease of mounting the device. The movable blade 38, the common terminal 34 and the leaf spring 35 which is integral with it, constitute a homogeneous one-piece sub-assembly. Indeed we can see in fig. 7, that the leaf spring 35, by its tension, pulls the movable blade 38 in the notch 32 and maintains it in the represented position by pressing against an edge formed in the movable blade 38. the free end of the spring blade 35, engaged up to its shoulders in the lumen 33 of the movable blade 38, forms therewith a flexible articulation. This sub-assembly can easily be introduced into the switch housing manually, or with automatic means. The subsequent mounting of the fixed contact 30 and of the pusher 39 releases the edge of the movable blade 38 from the leaf spring 35 and thus arms the movable blade 38 to ensure the necessary contact force. This sub-assembly system allows self-centering of the movable blade 38 on the common terminal 34 by the tension of the leaf spring 35. As a result, the width of the movable blade 38 may be maximum, which is favorable for the mechanical and electrical characteristics of the product.

L'invention porte également sur des particularités de construction qui permettent à un moindre coût, de résoudre certains problèmes liés à l'assemblage du produit ainsi qu'au montage de ses accessoires. La planche 3/3, fig. 9, 10, 11 et 12 expose en détail ces caractéristiques.The invention also relates to construction features which make it possible, at a lower cost, to solve certain problems linked to the assembly of the product as well as to the mounting of its accessories. Plate 3/3, fig. 9, 10, 11 and 12 explain these characteristics in detail.

Le montage des leviers qui sont les accessoires pricipaux des commutateurs miniatures, doit pouvoir aussi être réalisé par l'utilisateur. La fig. 9 représente, à titre d'exemple, un commutateur miniature équipé d'un levier 51 à galet 61. Ce levier pivote autour d'un axe 60 qui peut, à volonté, être placé dans les autres trous 52 de l'ensemble boitier-couvercle, afin de pouvoir faire varier la force de manoeuvre et la course d'action du levier. La fig. 12 est une coupe qui montre le même axe 60 utilisé également comme axe de pivotement du galet 61. Cet axe qui est moulé dans une matière thermoplastique adéquate d'un seul coup de presse, grâce à la forme en accordéon de sa partie centrale, peut, du fait de son élasticité, être suffisamment réduit en longueur, pour pénétrer dans la chape formée par le boitier-couvercle ou par le levier. Placé en alignement avec les trous concordants du boitier ou de la chape du levier, il reprend sa dimension initiale pour servir de pivot au levier 51 et au galet 61. La caractéristique de cet axe est de pouvoir être démonté et remonté sans détérioration, pour changer ou remplacer le levier ou le galet, manuellement avec des moyens simples.The assembly of the levers which are the main accessories of the miniature switches, must also be able to be carried out by the user. Fig. 9 shows, by way of example, a miniature switch equipped with a lever 51 with roller 61. This lever pivots about an axis 60 which can, at will, be placed in the other holes 52 of the housing assembly. cover, in order to be able to vary the operating force and the stroke of the lever. Fig. 12 is a section showing the same axis 60 also used as the pivot axis of the roller 61. This axis which is molded in a suitable thermoplastic material with a single press stroke, thanks to the accordion shape of its central part, can , due to its elasticity, be sufficiently reduced in length, to penetrate the yoke formed by the cover-box or by the lever. Placed in alignment with the concordant holes of the housing or the lever yoke, it returns to its initial dimension to serve as a pivot for the lever 51 and the roller 61. The characteristic of this axis is that it can be dismantled and reassembled without deterioration, to change or replace the lever or the roller, manually with simple means.

L'assemblage du couvercle 58 sur le boitier 57 se fait en général par rivets ou par fusion de plots, ce qui rend le démontage impossible. La coupe fig. 11 montre un autre moyen de tenue du couvercle. lorsque le boitier 57 est en matière thermoplastique. Les tenons 54 et 59 ainsi que la cheminée 62 du trou de fixation, voir fig. 9, guident et maintiennent le couvercle contre le boitier. Pour cela, la cheminée 62 ainsi que les tenons 54 et 59, se terminent en forme de collerette. Les trous correspondants du couvercle sont côniques et se terminent par un dégagement. Au montage, une pression modérée suffit pour enclencher le couvercle sur le boitier. Ce moyen de fixation tolère quelques démontages, et autorise si nécessaire, un soudage par fusion des tenons avec le couvercle. Les cônes dans les tenons sont prévus pour faciliter le démoulage de la collerette sans détérioration de celle-ci.

  • La fig. 1 est la coupe d'un commutateur en position contact haut.
  • La fig. 2 est la coupe d'un commutateur en position contact bas.
  • La fig. 3 est une perspective de l'organe de rupture brusque de 1 ou 2.
  • La fig. 4 est le diagramme course-force de manoeuvre de 1 et 2.
  • La fig. 5 est la coupe de commutateur objet de l'invention contact haut.
  • La fig. 6 est la coupe de commutateur objet de l'invention contact bas.
  • La fig. 7 est une perspective de l'organe de rupture brusque de 6 ou 7.
  • La fig. 8 est le diagramme course-force de manoeuvre de 6 et 7.
  • La fig. 9 montre le commutateur vue de face avec levier.
  • La fig. 10 le représente vue de gauche.
  • La fig. 11 est la coupe selon AA′.
  • La fig. 12 est la coupe selon BB′.
The assembly of the cover 58 on the housing 57 is generally done by rivets or by fusion of studs, which makes disassembly impossible. The cut fig. 11 shows another means of holding the cover. when the housing 57 is made of thermoplastic material. The pins 54 and 59 as well as the chimney 62 of the fixing hole, see fig. 9, guide and hold the cover against the housing. For this, the chimney 62 as well as the studs 54 and 59, end in the form of a collar. The corresponding holes in the cover are tapered and terminate in a clearance. During assembly, moderate pressure is enough to snap the cover onto the housing. This fixing means tolerates some disassembly, and allows if necessary, fusion welding of the studs with the cover. The cones in the studs are provided to facilitate demoulding of the collar without deterioration of the latter.
  • Fig. 1 is the section through a switch in the high contact position.
  • Fig. 2 is the section through a switch in the low contact position.
  • Fig. 3 is a perspective of the abrupt rupture member of 1 or 2.
  • Fig. 4 is the maneuvering stroke-force diagram of 1 and 2.
  • Fig. 5 is the switch section object of the invention high contact.
  • Fig. 6 is the switch section of the invention, low contact.
  • Fig. 7 is a perspective of the abrupt rupture member of 6 or 7.
  • Fig. 8 is the maneuvering stroke-force diagram of 6 and 7.
  • Fig. 9 shows the switch front view with lever.
  • Fig. 10 represents the view from the left.
  • Fig. 11 is the section along AA ′.
  • Fig. 12 is the section along BB ′.

La réalisation de l'invention ne pose pas de problème particulier à l'industrie spécialisée dans la fabrication de ce type de produit. On devra réaliser l'assemblage du ressort-lame 35 sur la borne commune 34 de telle sorte que : les deux pièces soient bien alignées,le ressort-lame puisse se décoller librement de la borne commune et que la liaison électrique entre les deux pièces soit parfaite. Il est recommandé de plier l'extrémité du ressort-lame à environ 45°, P fig. 7, afin de faciliter l'introduction du ressort-lame dans la lumière 33.The production of the invention does not pose any particular problem for the industry specializing in the manufacture of this type of product. The leaf spring 35 must be assembled on the common terminal 34 so that: the two parts are properly aligned, the leaf spring can be detached from the common terminal and the electrical connection between the two parts is perfect. It is recommended to bend the end of the leaf spring at around 45 °, P fig. 7, in order to facilitate the introduction of the leaf spring into the slot 33.

L'invention, dont les dessins sont appropriés à une réalisation industrielle, s'applique préférentiellement aux produits conformes à la Norme Internationale DIN 41635, forme A et assimilés.The invention, the drawings of which are suitable for industrial production, preferably applies to products conforming to International Standard DIN 41635, form A and the like.

Claims (6)

1. Quick-break switch, equipped with a control lever (51) or not, comprising a case (57) closed by a lid (58) in which a push-button (39) causes a mobile blade (38) with contacts (8), which ensure the electric continuity alternately between a common terminal (34) and one of two fixed terminals (30 or 31)to pivot in a notch (32) of the common terminal (34), a blade spring (35) fixed to one end of the common terminal (34) ensures, by the other free end, a tractive force on the mobile blade (38) and a reaction force on the push-button (39), wherein the blade spring (35) is fixed to the common terminal in such a mainer that it separates progressively from the slanted common terminal by increasing its active length, as the push-button is pressed in.
2. Switch as claimed in claim 1, wherein the plane of the common terminal (31) on which the blade spring (35) unwinds is slanted with respect to the mean position of the mobile blade (38) and more particularly by an angle of 50 plus or minus 5 .
3. Switch as claimed in claim 1, wherein the blade spring (35) fixed to the common terminal (34) holds the mobile blade (38) in a balanced position against the support formed by the edge (40) of the mobile blade (38), when this sub-assembly is out of the case, (figure 7).
4. Switch as claimed in claim 1, wherein the centering studs (54 or 59) as well as the chimney (62) of the plastic material case (57) are made in a single moulding operation.
5. Switch as claimed in claim 1, wherein the centering studs (54 or 59) as well as the chimney (42) of the plastic material case (57) have collars which are compressed on fitting the lid and which then free themselves to retain it when it is in position.
6. Switch with a control lever (51) carrying a roller (61) as claimed in claim 1, wherein the plastic material shaft (60) of the lever (51) and the roller (61) have a central portion compressible into concertina shape, which allow them to be moulded in a single operation.
EP87902544A 1986-04-16 1987-04-14 Miniature switch with sudden break Expired - Lifetime EP0302070B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8605673A FR2597658B1 (en) 1986-04-16 1986-04-16 SWITCHED MINIATURE SWITCH
FR8605673 1986-04-16

Publications (2)

Publication Number Publication Date
EP0302070A1 EP0302070A1 (en) 1989-02-08
EP0302070B1 true EP0302070B1 (en) 1991-11-21

Family

ID=9334417

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87902544A Expired - Lifetime EP0302070B1 (en) 1986-04-16 1987-04-14 Miniature switch with sudden break

Country Status (7)

Country Link
US (1) US5082997A (en)
EP (1) EP0302070B1 (en)
JP (1) JPH01502788A (en)
AU (1) AU7285887A (en)
DE (1) DE3774705D1 (en)
FR (1) FR2597658B1 (en)
WO (1) WO1987006388A1 (en)

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DE3827481A1 (en) * 1988-08-12 1990-02-15 Hartmann Kg Eduard ELECTRIC SWITCH
DE8915158U1 (en) * 1989-12-23 1990-02-08 Graesslin Kg, 7742 St. Georgen, De
FR2676585B1 (en) * 1991-05-15 1993-12-10 Roger Vialy JOINT BLADE-TERMINAL JOINT FOR SWITCH.
FR2702304B1 (en) * 1993-03-05 1995-06-16 Sextant Avionique MICRO SWITCH BLADE ARTICULATION.
DE9305074U1 (en) * 1993-04-02 1993-06-09 Schaltbau Ag, 8000 Muenchen, De
FR2716746B1 (en) * 1993-04-07 1997-01-10 Roger Vialy Snap-action microswitch with friction contacts.
JP3691059B2 (en) * 1993-08-03 2005-08-31 オッター コントロールズ リミテッド Improvements related to electrical switches
JPH08171832A (en) * 1994-10-18 1996-07-02 Matsushita Electric Ind Co Ltd Switch
US7275562B2 (en) * 2001-10-17 2007-10-02 Agilent Technologies, Inc. Extensible spiral for flex circuit
US6894241B1 (en) * 2004-02-26 2005-05-17 Tsung-Mou Yu Resilient switching device
FR2868874B1 (en) * 2004-04-09 2010-09-10 Itt Mfg Enterprises Inc ELECTRICAL SWITCH OF NORMALLY CLOSED TYPE
TWI264025B (en) * 2004-06-28 2006-10-11 Hon Hai Prec Ind Co Ltd Push switch
WO2014069907A1 (en) 2012-11-05 2014-05-08 주식회사 대동 High load switch for vehicle

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Also Published As

Publication number Publication date
AU7285887A (en) 1987-11-09
DE3774705D1 (en) 1992-01-02
WO1987006388A1 (en) 1987-10-22
JPH01502788A (en) 1989-09-21
FR2597658B1 (en) 1992-09-11
EP0302070A1 (en) 1989-02-08
US5082997A (en) 1992-01-21
FR2597658A1 (en) 1987-10-23

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