EP0035189A1 - Pushbutton for a control keyboard and method of manufacturing such a pushbutton - Google Patents

Pushbutton for a control keyboard and method of manufacturing such a pushbutton Download PDF

Info

Publication number
EP0035189A1
EP0035189A1 EP81101212A EP81101212A EP0035189A1 EP 0035189 A1 EP0035189 A1 EP 0035189A1 EP 81101212 A EP81101212 A EP 81101212A EP 81101212 A EP81101212 A EP 81101212A EP 0035189 A1 EP0035189 A1 EP 0035189A1
Authority
EP
European Patent Office
Prior art keywords
piston
button
contact
push button
mold
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.)
Granted
Application number
EP81101212A
Other languages
German (de)
French (fr)
Other versions
EP0035189B1 (en
Inventor
Jean-François Daroux
Hervé Allmendinger
Gilbert Schneider
Guy Wotling
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.)
ALE International SAS
Original Assignee
Telic Alcatel SA
La Telephone Industrielle et Commerciale Telic Alcatel SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Telic Alcatel SA, La Telephone Industrielle et Commerciale Telic Alcatel SA filed Critical Telic Alcatel SA
Publication of EP0035189A1 publication Critical patent/EP0035189A1/en
Application granted granted Critical
Publication of EP0035189B1 publication Critical patent/EP0035189B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • 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
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/02—Energy stored by the attraction or repulsion of magnetic parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2221/00—Actuators
    • H01H2221/036—Return force
    • H01H2221/04—Return force magnetic

Definitions

  • the present invention relates to a push button for a control keyboard, comprising at least one pair of electrical contacts brought into contact by acting on the push button, and to a method for manufacturing such a push button.
  • the components of a push button are usually assembled either by crimping the metal parts on the body of the push button, or by nesting the metal parts between two plastic parts.
  • the object of the invention is to simplify manufacture, by simultaneously positioning and calibrating the different parts constituting the push button.
  • the subject of the invention is a push button for a control keyboard, comprising at least one pair of electrical contacts secured to a support part and brought into contact by acting on the push button, a button body constituted by a sliding piston.
  • a cover the cover having a magnetic surface cooperating with a metal counter plate integral with the piston to constitute a magnetic return device for the push button, characterized in that the electrical contact support part and the metal counter plate are assembled on the piston of the button by overmolding.
  • FIGS. 1 and 2 there is shown a keyboard 1 provided with its identical pushbuttons 2 arranged in several rows above a printed circuit 3 with outputs 4. One of the push-buttons is shown in section in Figure 2.
  • This push button is shown in enlarged view in ' Figure 3 with its separate elements and in Figure 4 after assembly of its elements. It comprises a button head 2 which may possibly consist of two parts 5 and 7 obtained during a double injection molding operation, for example, in order to mark the key; the lower part 7 is mounted by clipping onto a vertical piston 6, forming the body of the button, by means of two hooks 8 formed on the edge of the piston ,. which engage in two notches 10 formed inside the head.
  • This piston 6 is slidably mounted in a cylinder 9 forming a guide barrel. The latter is integral with the cover 11 of the keyboard and clearly protrudes above the upper level of the cover.
  • the counter plate 14 and the contact parts 15 are assembled at the base of the piston 6 by means of an insulating head 18 produced during the molding of the button piston, as will be seen below.
  • the shape of the counterplate 14 is shown in Figure 5; it comprises a central orifice 19 for the passage of the piston 6 and the cutouts 20, 21 making it possible to pre-wire the contact blades 16 and 17 during assembly.
  • the shape of the contact piece 15 is shown in Figure 6; it includes a central part 22 provided with an orifice 50 for the passage of the piston 6 and two lateral tabs 16, 17 forming contact springs and terminated by contact pads 23, 24 intended to come into contact with metallized pads of the circuit printed 3 (fig. 4).
  • Figure 4 shows the push button in the rest position. In this position, the piston 6 is held in the high position by magnetic attraction between the metal counter plate 14 and the magnetic sheet 13. If the push button is pressed, the counter plate 14 is detached from the magnetic sheet 13 and closing of the contacts 23, 24 with the printed circuit 3. When the push button is released, the latter rises with an abrupt movement ensuring an abrupt rupture of the contact.
  • the barrel 9 while guiding the piston 6 makes it possible to obtain a seal against the run-off of a liquid on the top of the cover 11.
  • the fixing by overmolding of the contact piece 15 and the counter-plate 14 on the piston 6 of the button ensures perfect retention of the contact springs and a guarantee of good establishment of the electrical contact.
  • the clipping of the button head 2 on the piston of the button ensures both a good fixing of these elements as well as a possibility of interchanging the button heads.
  • FIG. 7 illustrates the process for overmolding the blades of contact on the push-button piston by means of a two-part mold 25, 26, as shown, which ensures, during the molding of the piston, the overmolding of the counterplate 14 and of the contact piece 15.
  • the metal counter plates 14 and the contact pieces 15 are presented in the form of continuous strips between the two half-shells 25, 26 of the mold.
  • the lower half-shell 26 has a housing in the shape of the contact piece 15, having a central stud 27 for the central hole 50 of the contact piece 15 and two lateral passages 28, 29 for receiving the two lateral branches 16 respectively. , 17 of the contact part. These lateral corridors have their inclined bottom so as to allow the bending of the lateral branches 16, 17 of the contact part when the mold is closed.
  • the upper half-shell 25 ′ has the complementary shape.
  • the lower half-shell 26 also has six punches 31 for fixing the contact piece 15, so that the metal counter plate 14 and the contact piece 15 are in perfect contact with one another.
  • the upper half-shell 25 comprises a vertical housing 32, in which the button piston 6 is molded, and two pins 33 for guiding the parts. These two pins 33 pass through holes 34 in the strip of counter plates, then through holes 35 in the strip of contact pieces, then slide in two lateral grooves 36 in the lower half-shell 26 so as to position these four elements one above the other.
  • the third phase consists of injecting plastic material into the mold. Once this material has cooled sufficiently, after demolding and cutting the counter-plates and contact parts at their intermediate connections in the strips, a push button assembled with its counter-plate and its contact part is obtained.
  • a cavity 32 by means of the stud 27 is formed at the base of the piston so as to allow it to be grasped and moved in the transfer chain, during the assembly operation of the control keyboard.
  • the counterplate 14 with two lugs 39 on which the corners 41 of the contact piece will be folded down to reinforce the fixing of these pieces to one another.
  • the plastic material includes these pins which ensures good support after cooling.
  • the invention applies to any keyboard with push-buttons for electric or electronic machines. It also applies to an isolated push button, the keyboard then comprising only one pair of contacts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Push-Button Switches (AREA)
  • Manufacture Of Switches (AREA)

Abstract

1. A push-button (2) for a control keyboard comprising at least one pair of electric contacts (23, 24) which are integral with a support piece (15) and which are brought into contact with a printed circuit (3) by depressing the push-button (2), a body of a button constituted by a piston (6) sliding in a cover (11), the cover having a magnetic surface (13) which co-operates with a metal backing plate (14) integral with the piston (6) to constitute a magnetic push-button (2) return device, characterized in that the electric contact (23, 24) support piece (15) and the metal backing plate (14) are assembled on the piston (6) of the push-button by a moulding process.

Description

La présente invention concerne un bouton-poussoir pour clavier de commande, comportant au moins une paire de contacts électriques mis en contact en agissant sur le bouton-poussoir et un procédé de fabrication d'un tel bouton-poussoir.The present invention relates to a push button for a control keyboard, comprising at least one pair of electrical contacts brought into contact by acting on the push button, and to a method for manufacturing such a push button.

Les éléments constitutifs d'un bouton-poussoir sont habituellement assemblés soit par sertissage des pièces métalliques sur le corps du bouton-poussoir, soit par imbrication des pièces métalliques entre deux pièces plastiques.The components of a push button are usually assembled either by crimping the metal parts on the body of the push button, or by nesting the metal parts between two plastic parts.

Le but de l'invention est de simplifier la fabrication, en réalisant simultanément le positionnement et le calibrage des différentes pièces constituant le bouton-poussoir.The object of the invention is to simplify manufacture, by simultaneously positioning and calibrating the different parts constituting the push button.

L'invention a pour objet un bouton-poussoir pour clavier de commande, comportant au moins une paire de contacts électriques solidaires d'une pièce support et mis en contact en agissant sur le bouton-poussoir, un corps de bouton constitué par un piston coulissant dans un capot, le capot présentant une surface magnétique coopérant avec une contre-plaque métallique solidaire du piston pour constituer un dispositif de rappel magnétique du bouton-poussoir, caractérisé par le fait que la pièce support de contact électrique et la contre-plaque métallique sont assemblées sur le piston du bouton par surmoulage.The subject of the invention is a push button for a control keyboard, comprising at least one pair of electrical contacts secured to a support part and brought into contact by acting on the push button, a button body constituted by a sliding piston. in a cover, the cover having a magnetic surface cooperating with a metal counter plate integral with the piston to constitute a magnetic return device for the push button, characterized in that the electrical contact support part and the metal counter plate are assembled on the piston of the button by overmolding.

L'invention a également pour objet un procédé de fabrication d'un tel bouton-poussoir caractérisé par le fait qu'il consiste

  • - à présenter dans une chaîne de transfert une bande de contre-plaques et une bande de pièces support de contact,
  • - à positionner une pièce support de contact et une contre-plaque entre deux demi-coquilles d'un moule pour le piston, ce moule étant muni de couloirs inclinés qui servent à loger les lames de contact,
  • - à rapprocher les deux demi-coquilles du moule de façon à plaquer les deux éléments l'un sur l'autre,
  • - à injecter de la matière plastique dans le moule;
  • - et à monter le piston sur le capot et la tête de bouton sur le piston.
The invention also relates to a method of manufacturing such a push button, characterized in that it consists
  • to present in a transfer chain a strip of counter plates and a strip of contact support parts,
  • to position a contact support piece and a counter plate between two half-shells of a mold for the piston, this mold being provided with inclined passages which serve to house the contact blades,
  • - bringing the two half-shells of the mold together so as to press the two elements one on the other,
  • - inject plastic material into the mold;
  • - and to mount the piston on the cover and the button head on the piston.

L'invention va être précisée par la description donnée ci-après d'un mode préféré de réalisation de l'invention, en référence au dessin annexé dans lequel :

  • Les figures 1 et 2 sont respectivement une vue de dessus et une vue en élévation partiellement coupée d'un clavier à boutons-poussoirs selon l'invention.
  • La figure 3 est une vue éclatée montrant les divers éléments constitutifs d'un bouton-poussoir.
  • La figure 4 est une vue en élévation et en coupe d'un bouton-poussoir selon la figure 3.
  • La figure 5 est une vue de dessus d'une contre-plaque métallique montrant le piston dudit bouton-poussoir.
  • La figure 6 est une vue en plan d'une pièce support de contact.
  • La figure 7 est une vue éclatée montrant le moule utilisé pour l'assemblage du bouton-poussoir.
The invention will be clarified by the description given below of a preferred embodiment of the invention, with reference to the accompanying drawing in which:
  • Figures 1 and 2 are respectively a top view and a partially cut elevation view of a push button keyboard according to the invention.
  • Figure 3 is an exploded view showing the various components of a push button.
  • FIG. 4 is a view in elevation and in section of a push button according to FIG. 3.
  • Figure 5 is a top view of a metal counter plate showing the piston of said push button.
  • Figure 6 is a plan view of a contact support part.
  • Figure 7 is an exploded view showing the mold used for the assembly of the push button.

Dans les figures 1 et 2 on a représenté un clavier 1 muni de ses boutons-poussoirs 2 identiques disposés en plusieurs rangées au-dessus d'un circuit imprimé 3 avec sorties 4 . L'un des boutons-poussoirs est représenté en coupe en figure 2.In FIGS. 1 and 2 there is shown a keyboard 1 provided with its identical pushbuttons 2 arranged in several rows above a printed circuit 3 with outputs 4. One of the push-buttons is shown in section in Figure 2.

Ce bouton-poussoir est représenté en vue agrandie sur' la figure 3 avec ses éléments séparés et sur la figure 4 après assemblage de ses éléments. Il comprend une tête de bouton 2 qui peut être constituée éventuellement de deux parties 5 et 7 obtenues lors d'une opération de moulage par double injection, par exemple, afin de réaliser le marquage de la touche ; la partie inférieure 7 est montée par clipsage sur un piston vertical 6, formant le corps du bouton, au moyen de deux crochets 8 ménagés sur le bord du piston,. qui viennent s'engager dans deux encoches 10 ménagées à l'intérieur de la tête. Ce piston 6 est monté coulissant dans un cylindre 9 formant fût de guidage. Ce dernier fait corps avec le capot 11 du clavier et dépasse nettement au-dessus du niveau supérieur du capot. Sous le capot 11 sont placées deux plaques ou feuilles, l'une métallique 12 jouant le rôle de shunt magnétique, l'autre en élastomère magnétique 13. Cette dernière coopére avec une contre-plaque métallique 14 pour le rappel magnétique du bouton-poussoir. Sous cette contre-plaque 14 est disposée une pièce de contact 15 faisant partie d'une pièce découpée puis métallisée dont la forme est représentée figure 6 ; cette pièce de contac-t 1<5 est munie de lames de contact 16 et 17 coopérant avec le circuit imprimé 3.This push button is shown in enlarged view in 'Figure 3 with its separate elements and in Figure 4 after assembly of its elements. It comprises a button head 2 which may possibly consist of two parts 5 and 7 obtained during a double injection molding operation, for example, in order to mark the key; the lower part 7 is mounted by clipping onto a vertical piston 6, forming the body of the button, by means of two hooks 8 formed on the edge of the piston ,. which engage in two notches 10 formed inside the head. This piston 6 is slidably mounted in a cylinder 9 forming a guide barrel. The latter is integral with the cover 11 of the keyboard and clearly protrudes above the upper level of the cover. Under the cover 11 are placed two plates or sheets, one metallic 12 playing the role of magnetic shunt, the other made of magnetic elastomer 13. The latter cooperates with a metallic counter plate 14 for the magnetic return of the push button. Under this counter plate 14 is disposed a contact piece 15 forming part a cut out piece then metallized, the shape of which is shown in FIG. 6; this contact piece 1 <5 is provided with contact blades 16 and 17 cooperating with the printed circuit 3.

La contre-plaque 14 et les pièces de contact 15 sont assemblées à la base du piston 6 au moyen d'une tête isolante 18 réalisée lors du moulage du piston de bouton, comme on le verra plus loin.The counter plate 14 and the contact parts 15 are assembled at the base of the piston 6 by means of an insulating head 18 produced during the molding of the button piston, as will be seen below.

La forme de la contre-plaque 14 est représentée sur la figure 5 ; elle comporte un orifice central 19 pour le passage du piston 6 et des découpes 20, 21 permettant de réaliser un précambrage des lames de contact 16 et 17 lors de l'assemblage.The shape of the counterplate 14 is shown in Figure 5; it comprises a central orifice 19 for the passage of the piston 6 and the cutouts 20, 21 making it possible to pre-wire the contact blades 16 and 17 during assembly.

La forme de la pièce de contact 15 est représentée sur la figure 6 ; elle comprend une partie centrale 22 munie d'un orifice 50 pour le passage du piston 6 et deux pattes latérales 16, 17 formant ressorts de contact et terminées par des plots de contact 23, 24 destinés à venir en contact avec des plots métallisés du circuit imprimé 3 (fig.4).The shape of the contact piece 15 is shown in Figure 6; it includes a central part 22 provided with an orifice 50 for the passage of the piston 6 and two lateral tabs 16, 17 forming contact springs and terminated by contact pads 23, 24 intended to come into contact with metallized pads of the circuit printed 3 (fig. 4).

La figure 4 représente le bouton-poussoir en position repos. Dans cette position le piston 6 est maintenu en position haute par attraction magnétique entre la contre-plaque métallique 14 et la feuille magnétique 13. Si l'on appuie sur le bouton-poussoir, on obtient le décollement de la contre-plaque 14 de la feuille magnétique 13 et la fermeture des contacts 23, 24 avec le circuit imprimé 3. Lorsque l'on lâche le bouton-poussoir celui-ci remonte d'un mouvement brusque assurant une rupture brusque du contact.Figure 4 shows the push button in the rest position. In this position, the piston 6 is held in the high position by magnetic attraction between the metal counter plate 14 and the magnetic sheet 13. If the push button is pressed, the counter plate 14 is detached from the magnetic sheet 13 and closing of the contacts 23, 24 with the printed circuit 3. When the push button is released, the latter rises with an abrupt movement ensuring an abrupt rupture of the contact.

Le fût 9 tout en assurant le guidage du piston 6 permet d'obtenir une étanchéité au ruissellement d'un liquide sur le dessus du capot 11.The barrel 9 while guiding the piston 6 makes it possible to obtain a seal against the run-off of a liquid on the top of the cover 11.

La fixation par surmoulage de la pièce de contact 15 et de la contre-plaque 14 sur le piston 6 du bouton assure un parfait maintien des ressorts de contact et une garantie de bon établissement du contact électrique.The fixing by overmolding of the contact piece 15 and the counter-plate 14 on the piston 6 of the button ensures perfect retention of the contact springs and a guarantee of good establishment of the electrical contact.

Le clipsage de la tête de bouton 2 sur le piston du bouton assure à la fois une bonne fixation de ces éléments ainsi qu'une possibilité d'interchanger les têtes de bouton.The clipping of the button head 2 on the piston of the button ensures both a good fixing of these elements as well as a possibility of interchanging the button heads.

La figure 7 illustre le procédé de surmoulage des lames de contact sur le piston de bouton-poussoir au moyen d'un moule en deux parties 25, 26, comme représenté, qui assure lors du moulage du piston simultanément le surmoulage de la contre-plaque 14 et de la pièce de contact 15.FIG. 7 illustrates the process for overmolding the blades of contact on the push-button piston by means of a two-part mold 25, 26, as shown, which ensures, during the molding of the piston, the overmolding of the counterplate 14 and of the contact piece 15.

Les contre-plaques métalliques 14 et les pièces de contact 15 sont présentées sous forme de bandes continues entre les deux demi-coquilles 25, 26 du moule.The metal counter plates 14 and the contact pieces 15 are presented in the form of continuous strips between the two half-shells 25, 26 of the mold.

La demi-coquille inférieure 26 comporte un logement de la forme de la pièce de contact 15, présentant un téton central 27 pour le trou central 50 de la pièce de contact 15 et deux couloirs latéraux 28, 29 pour recevoir respectivement les deux branches latérales 16, 17 de la pièce de contact. Ces couloirs latéraux ont leur fond incliné de façon à permettre le cambrage des branches latérales 16, 17 de la pièce de contact lors de la fermeture du moule. La demi-coquille supérieure 25 'comporte la forme complémentaire. La demi-coquille inférieure 26 présente également six poinçons 31 pour la fixation de la pièce de contact 15, afin que la contre-plaque métallique 14 et la pièce de contact 15 soient en parfait contact l'une contre l'autre.The lower half-shell 26 has a housing in the shape of the contact piece 15, having a central stud 27 for the central hole 50 of the contact piece 15 and two lateral passages 28, 29 for receiving the two lateral branches 16 respectively. , 17 of the contact part. These lateral corridors have their inclined bottom so as to allow the bending of the lateral branches 16, 17 of the contact part when the mold is closed. The upper half-shell 25 ′ has the complementary shape. The lower half-shell 26 also has six punches 31 for fixing the contact piece 15, so that the metal counter plate 14 and the contact piece 15 are in perfect contact with one another.

La demi-coquille supérieure 25 comporte un logement vertical 32, dans lequel est moulé le piston de bouton 6, et deux tétons 33 de guidage des pièces. Ces deux tétons 33 passent dans des trous 34 de la bande de contre-plaques, puis dans des trous 35 de la bande de pièces de contact, puis coulissent dans deux gorges latérales 36 de la demi-coquille inférieure 26 de façon à positionner ces quatre éléments les uns au-dessus des autres.The upper half-shell 25 comprises a vertical housing 32, in which the button piston 6 is molded, and two pins 33 for guiding the parts. These two pins 33 pass through holes 34 in the strip of counter plates, then through holes 35 in the strip of contact pieces, then slide in two lateral grooves 36 in the lower half-shell 26 so as to position these four elements one above the other.

La mise en oeuvre du procédé de surmoulage est réalisée en trois phases de la façon suivante :

  • La première phase consiste à présenter dans une chaîne de transfert une bande de contre-plaques assemblées par des liaisons 37 et une bande de pièces de contact assemblées par des liaisons 38, ces éléments étant positionnés l'un par rapport à l'autre et par rapport aux deux demi-coquilles du moule au moyen des deux tétons de guidage 33. La deuxième phase d'assemblage proprement dite consiste à rapprocher les deux demi-coquilles du moule de façon à assurer simultanément :
  • - le positionnement de la contre-plaque 14 par rapport à la pièce de contact 15, d'une part, et de ces deux éléments par rapport au moule d'autre part,
  • - le placage de ces deux éléments l'un sur l'autre à l'aide des six poinçons de fixation 31,
  • - le cambrage des ressorts de contact réalisé au moyen des découpes 20, 21 obtenues dans la contre-plaque et des couloirs 28, 29 prévus dans les demi-coquilles.
The implementation of the overmolding process is carried out in three phases as follows:
  • The first phase consists in presenting in a transfer chain a strip of counter-plates assembled by connections 37 and a strip of contact pieces assembled by connections 38, these elements being positioned relative to each other and by relative to the two half-shells of the mold by means of the two guide pins 33. The second assembly phase proper consists in bringing the two half-shells of the mold together so as to simultaneously ensure:
  • the positioning of the counter plate 14 relative to the contact piece 15, on the one hand, and of these two elements relative to the mold on the other hand,
  • the plating of these two elements one on the other using the six fixing punches 31,
  • - the bending of the contact springs produced by means of the cutouts 20, 21 obtained in the counter-plate and of the passages 28, 29 provided in the half-shells.

La troisième phase consiste à injecter de la matière plastique dans le moule. Une fois cette matière suffisamment refroidie, après démoulage et découpe des contre-plaques et des pièces de contact au niveau de leurs liaisons intermédiaires dans les bandes, on obtient un bouton-poussoir assemblé avec sa contre-plaque et sa pièce de contact.The third phase consists of injecting plastic material into the mold. Once this material has cooled sufficiently, after demolding and cutting the counter-plates and contact parts at their intermediate connections in the strips, a push button assembled with its counter-plate and its contact part is obtained.

Au cours de l'opération de moulage, une cavité 32 à l'aide du téton 27 est ménagée à la base du piston de façon à permettre de saisir et déplacer ce dernier dans la chaîne de transfert, lors de l'opération de montage du clavier de commande.During the molding operation, a cavity 32 by means of the stud 27 is formed at the base of the piston so as to allow it to be grasped and moved in the transfer chain, during the assembly operation of the control keyboard.

Le procédé selon l'invention permet ainsi de réaliser en une seule opération :

  • - le surmoulage de la pièce de contact et de la contre-plaque sur le piston de bouton,
  • - le cambrage des lames de contact,
  • - le positionnement avec calibrage des différentes pièces assemblées.
The method according to the invention thus makes it possible to carry out in a single operation:
  • - the overmolding of the contact piece and the counterplate on the button piston,
  • - the arching of the contact blades,
  • - positioning with calibration of the various assembled parts.

Les opérations de fixation, positionnement et cambrage étant menées automatiquement en une seule fois, au lieu de trois opérations séparées, il en résulte un gain de temps et de coût en production appréciable. De plus le calibrage et le cambrage sont réalisés avec une meilleure précision.The fixing, positioning and bending operations being carried out automatically at one time, instead of three separate operations, this results in significant time and cost savings in production. In addition, calibration and arching are performed with better precision.

On peut également munir la contre-plaque 14 de deux ergots 39 sur lesquels seront rabattus des coins 41 de la pièce de contact pour renforcer la fixation de ces pièces l'une sur l'autre. Lors de l'opération de moulage, la matière plastique englobe ces ergots ce qui assure un bon maintien après refroidissement.It is also possible to provide the counterplate 14 with two lugs 39 on which the corners 41 of the contact piece will be folded down to reinforce the fixing of these pieces to one another. During the molding operation, the plastic material includes these pins which ensures good support after cooling.

L'invention s'applique à tout clavier à touches enfonçables pour machines électriques ou électroniques. Elle s'applique également à un bouton-poussoir isolé, le clavier ne comportant alors qu'une seule paire de contacts.The invention applies to any keyboard with push-buttons for electric or electronic machines. It also applies to an isolated push button, the keyboard then comprising only one pair of contacts.

Claims (5)

1/ Bouton-poussoir pour clavier de commande, comportant au moins une paire de contacts électriques (16, 17) solidaires d'une pièce support (15) et mis en contact avec un circuit imprimé (3) en agissant sur le bouton-poussoir, un corps de bouton constitué par un piston (6) coulissant dans un capot (11), le capot présentant une surface magnétique (13) coopérant avec une contre-plaque métallique (14) solidaire du piston pour constituer un dispositif de rappel magnétique du bouton-poussoir, caractérisé par le fait que la pièce support de contact électrique (15) et la contre-plaque métallique (14) sont assemblées sur le piston du bouton par surmoulage.1 / Push button for control keyboard, comprising at least one pair of electrical contacts (16, 17) secured to a support piece (15) and brought into contact with a printed circuit (3) by acting on the push button , a button body consisting of a piston (6) sliding in a cover (11), the cover having a magnetic surface (13) cooperating with a metal counter plate (14) integral with the piston to constitute a magnetic return device of the push button, characterized in that the electrical contact support part (15) and the metal counter plate (14) are assembled on the piston of the button by overmolding. 2/ Bouton-poussoir selon l'une des revendications 1, caractérisé par le fait que la pièce support de contact électrique (15) comprend une partie centrale avec une fenêtre (50) pour le passage du piston de bouton et deux lames latérales (16, 17) de sens opposés formant ressort et supportant les contacts proprement dits.2 / Push button according to one of claims 1, characterized in that the electrical contact support part (15) comprises a central part with a window (50) for the passage of the button piston and two lateral blades (16 , 17) in opposite directions forming a spring and supporting the contacts themselves. 3/ Bouton-poussoir selon l'une des revendications 1 ou 2, caractérisé par le fait que la contre-plaque (14) comporte des découpes (20, 21) de sens opposé permettant un précambrage des lames de contact.3 / Push button according to one of claims 1 or 2, characterized in that the counter-plate (14) comprises cutouts (20, 21) in opposite directions allowing pre-wiring of the contact blades. 4/ Procédé de fabrication d'un bouton-poussoir selon l'une des revendications précédentes,
caractérisé par le fait qu'il consiste - à présenter dans une chaîne de transfert une bande de contre-plaques métalliques et une bande de pièces support de contact, - à positionner une pièce support de contact et une contre-plaque entre deux demi-coquilles (25, 26) d'un moule pour le piston (6), le moule étant muni de couloirs (28, 29) inclinés qui servent à loger les lames de contact , - à rapprocher les deux demi-coquilles (25, 26) du moule de façon à plaquer les deux éléments l'un sur l'autre, - à injecter de la matière plastique dans le moule, - et à monter le piston (6) sur le capot et la tête (2) de bouton sur le piston. 4 / A method of manufacturing a push button according to one of the preceding claims,
characterized by the fact that it consists - to present in a transfer chain a strip of metal counter plates and a strip of contact support parts, - Positioning a contact support piece and a counter plate between two half-shells (25, 26) of a mold for the piston (6), the mold being provided with inclined passages (28, 29) which serve to accommodate contact blades, - bringing the two half-shells (25, 26) closer to the mold so as to press the two elements one on the other, - to inject plastic material into the mold, - And to mount the piston (6) on the cover and the button head (2) on the piston. 5/ Procédé selon la revendication 4, caractérisé par le fait que les éléments sont assemblés en même temps que le moulage du corps du bouton.5 / A method according to claim 4, characterized in that the elements are assembled at the same time as the molding of the button body.
EP81101212A 1980-02-27 1981-02-20 Pushbutton for a control keyboard and method of manufacturing such a pushbutton Expired EP0035189B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8004307A FR2476900A1 (en) 1980-02-27 1980-02-27 PUSH BUTTON FOR CONTROL KEYBOARD AND METHOD OF MAKING SAME
FR8004307 1980-02-27

Publications (2)

Publication Number Publication Date
EP0035189A1 true EP0035189A1 (en) 1981-09-09
EP0035189B1 EP0035189B1 (en) 1984-07-04

Family

ID=9239038

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81101212A Expired EP0035189B1 (en) 1980-02-27 1981-02-20 Pushbutton for a control keyboard and method of manufacturing such a pushbutton

Country Status (5)

Country Link
EP (1) EP0035189B1 (en)
JP (1) JPS56136417A (en)
DE (1) DE3164499D1 (en)
ES (1) ES499831A0 (en)
FR (1) FR2476900A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2544545A1 (en) * 1983-04-18 1984-10-19 Gerard Michel Operating keypad for electrical or electronic devices
EP0189132A2 (en) * 1985-01-22 1986-07-30 Lexmark International, Inc. Magnetically snap actuated contact keyboard apparatus
GB2183916A (en) * 1985-11-13 1987-06-10 Devlin Electronics Limited Improvements relating to keypads
FR2602909A1 (en) * 1986-08-14 1988-02-19 Schoeller & Co Elektrotech METHOD FOR MANUFACTURING TOUCH CONTACTING ARRANGEMENT AND PROVISIONING TOUCH CONTACTORS
US20120025935A1 (en) * 2010-07-30 2012-02-02 Hon Hai Precision Industry Co., Ltd. Magnetic switch apparatus
DE102017114189A1 (en) * 2017-06-27 2018-12-27 Cherry Gmbh Carrier element for a keyboard, keyboard and method for producing a keyboard

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB926353A (en) * 1958-12-08 1963-05-15 Kooperativa Foerbundet Improvements in key mechanisms particularly for operating electrical contact means

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6815907A (en) * 1968-11-08 1970-05-12
FR2044038A5 (en) * 1969-05-05 1971-02-19 Crouzet & Cie
GB1326963A (en) * 1971-03-03 1973-08-15 Burgess Micro Switch Co Ltd Operating members for snapaction switches and a method of making said members
US3826885A (en) * 1972-06-23 1974-07-30 Wild Rover Corp Pushbutton switch having spider-shaped contact contact carrier
DE2313750A1 (en) * 1973-03-20 1974-10-03 Leo Dr Steipe SWITCH OR PRESSURE CONTACT WITH ENERGY STORAGE AND JUMPING POINT
US3942145A (en) * 1974-09-03 1976-03-02 Teletype Corporation Snap-action switch
US3934104A (en) * 1974-09-23 1976-01-20 Stout Glenn M Push-button switch
FR2395546A2 (en) * 1977-06-22 1979-01-19 Serras Paulet Edouard ALPHANUMERIC KEYPAD WITH PRESSURE KEYS FOR ELECTRICAL OR ELECTRONIC MACHINE
JPS5256377A (en) * 1976-11-06 1977-05-09 Matsushita Electric Ind Co Ltd Method of manufacturing push type switch

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB926353A (en) * 1958-12-08 1963-05-15 Kooperativa Foerbundet Improvements in key mechanisms particularly for operating electrical contact means

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2544545A1 (en) * 1983-04-18 1984-10-19 Gerard Michel Operating keypad for electrical or electronic devices
EP0189132A2 (en) * 1985-01-22 1986-07-30 Lexmark International, Inc. Magnetically snap actuated contact keyboard apparatus
EP0189132A3 (en) * 1985-01-22 1989-03-22 International Business Machines Corporation Magnetically snap actuated contact keyboard apparatus
GB2183916A (en) * 1985-11-13 1987-06-10 Devlin Electronics Limited Improvements relating to keypads
GB2183916B (en) * 1985-11-13 1990-02-07 Devlin Electronics Limited Improvements relating to telephone keypads
FR2602909A1 (en) * 1986-08-14 1988-02-19 Schoeller & Co Elektrotech METHOD FOR MANUFACTURING TOUCH CONTACTING ARRANGEMENT AND PROVISIONING TOUCH CONTACTORS
US20120025935A1 (en) * 2010-07-30 2012-02-02 Hon Hai Precision Industry Co., Ltd. Magnetic switch apparatus
DE102017114189A1 (en) * 2017-06-27 2018-12-27 Cherry Gmbh Carrier element for a keyboard, keyboard and method for producing a keyboard

Also Published As

Publication number Publication date
ES8206086A1 (en) 1982-06-16
ES499831A0 (en) 1982-06-16
FR2476900B1 (en) 1982-06-25
FR2476900A1 (en) 1981-08-28
DE3164499D1 (en) 1984-08-09
EP0035189B1 (en) 1984-07-04
JPS56136417A (en) 1981-10-24

Similar Documents

Publication Publication Date Title
EP0591074B1 (en) Moulded case circuit breaker with auxiliary contacts
FR2929043A1 (en) MOBILE CONTACT HOLDER OF AN ELECTRICAL INSTALLATION AND METHOD FOR ASSEMBLING THE MOBILE CONTACT HOLDER.
EP0035189B1 (en) Pushbutton for a control keyboard and method of manufacturing such a pushbutton
EP0185721B1 (en) Keyboard for the control box of an electric apparatus
BE1014955A3 (en) Housing with connection terminals.
FR2517109A1 (en) MULTIPLE MINIATURE SWITCH, HAVING A TILTING MANEUVER, AND METHOD FOR IMPLEMENTING SUCH A SWITCH
CA2280401A1 (en) Command key with integrated lighting and process for manufacturing the said key
FR2673485A1 (en) CIRCUIT BREAKER CONNECTING ROD FOR AUTOMATIC MOUNTING.
EP0223891B1 (en) Moulding equipment for the injection moulding of plastic materials
EP0403358A1 (en) Neutral and phase circuit breaker
FR2482363A1 (en) ELECTRICAL SWITCH WITH VERTICAL PUSH-BUTTON
FR2650116A1 (en) PUSH BUTTON SWITCH
EP0551777B1 (en) Switch apparatus for electromagnetic and manual control
FR2801720A1 (en) MANUAL PUSH-BUTTON SOLENOID VALVE
US2938985A (en) Push button switch
FR2518311A1 (en) POLARIZED RELAY
KR101951687B1 (en) Manufacturing method of metal button for portable device
FR2735945A1 (en) Push button appts for control or signalling equipment
FR2526996A1 (en) ELECTRIC SWITCH PROVIDED IN PARTICULAR WITH A CONTROL PUSH-BUTTON AND A MAGNET
EP0278850B1 (en) Electrical switch with a modular structure
FR2551601A1 (en) DEVICE FOR CAPACITIVE SWITCH FOR LOW PROFILE KEYBOARD
EP0435131B1 (en) Keybord with captive keys
FR2463974A1 (en) Vandal proof telephone pushbutton keyboard - has pushbutton inner portion telescoping into outer portion to limit pressure applied to switch contacts
FR2474957A1 (en) TOUCH KEYBOARD MECHANISM
FR2729795A1 (en) Mechanical wire termination and contact insertion machine for connector boxes

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE GB IT

17P Request for examination filed

Effective date: 19820209

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: LA TELEPHONIE INDUSTRIELLE ET COMMERCIALE TELIC AL

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE DE GB IT

REF Corresponds to:

Ref document number: 3164499

Country of ref document: DE

Date of ref document: 19840809

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19891231

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19900208

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19900222

Year of fee payment: 10

ITTA It: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19910220

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19910228

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19911101