EP0163586A2 - Piezoelectric ignition device - Google Patents

Piezoelectric ignition device Download PDF

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Publication number
EP0163586A2
EP0163586A2 EP85420078A EP85420078A EP0163586A2 EP 0163586 A2 EP0163586 A2 EP 0163586A2 EP 85420078 A EP85420078 A EP 85420078A EP 85420078 A EP85420078 A EP 85420078A EP 0163586 A2 EP0163586 A2 EP 0163586A2
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EP
European Patent Office
Prior art keywords
sheath
sleeve
anvil
stopper
piezoelectric element
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.)
Withdrawn
Application number
EP85420078A
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German (de)
French (fr)
Other versions
EP0163586A3 (en
Inventor
Ichikawa Masaharu
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.)
Intermatch SA
KK Piem Riken
PIEM RIKEN KK
Original Assignee
Intermatch SA
KK Piem Riken
PIEM RIKEN KK
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.)
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Publication date
Application filed by Intermatch SA, KK Piem Riken, PIEM RIKEN KK filed Critical Intermatch SA
Publication of EP0163586A2 publication Critical patent/EP0163586A2/en
Publication of EP0163586A3 publication Critical patent/EP0163586A3/en
Withdrawn legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23QIGNITION; EXTINGUISHING-DEVICES
    • F23Q3/00Igniters using electrically-produced sparks
    • F23Q3/002Igniters using electrically-produced sparks using piezoelectric elements

Definitions

  • the present invention relates to a piezoelectric ignition device, in particular, although not exclusively, for a gas lighter.
  • the piezoelectric ignition devices generally comprise a tubular sheath mounted axially movable between two extreme positions, respectively extended and retracted, in a tubular body closed by a bottom, at one of its ends, this tubular sheath containing, starting from its outer end, an anvil made of electrically conductive material, a piezoelectric element and a cylindrical element forming a stopper, also made of an electrically conductive material, these three members being axially connected to the sheath by being pressed axially, one against the other, a striker associated with spring means being provided to strike against the stopper at the end of the re-entering stroke of the sleeve, the first part of which is used to band the associated spring means to the striker while other spring means normally tend to return and maintain the sheath in its extreme out position.
  • the axial immobilization of the metal cylinder is generally obtained by an internal shoulder of the bore of the sheath while those of the piezoelectric element and the anvil are generally obtained using an adhesive resin.
  • the layer formed by the adhesive resin has the advantage of constituting a good insulator between the two poles of the piezoelectric element, but it also has the drawback of being long and difficult to install, of being fragile, to break easily and, by its rigidity, to limit the deformations of the piezoelectric element which has the effect of weakening the electric power of the piezoelectric element until rendering the igniter unusable.
  • the present invention aims to remedy all these drawbacks.
  • the internal transverse dimensions of the sheath are slightly smaller than the transverse dimensions of the stopper, the piezoelectric element and the anvil, so that their axial fixation in the sheath is ensured by simple wedging or radial stress, used to generate their axial pressurization.
  • the sheath is made of an elastically deformable material improving the radial stressing of the three members.
  • a material which is perfectly suitable for making up the sheath is a polyamide or a polyacetaJ.
  • the anvil carries at least one radial notch and, on the other hand, the sheath has a lateral window capable of receiving and retaining the notch of the anvil after axial tensioning of the sheath.
  • this device essentially comprises a tubular body (2) closed, at one of its ends, by a bottom (2a) and in which is mounted a tubular sheath (3) axially movable between two extreme positions, exit and return respectively.
  • the figure of the drawing shows the body (2) and the sleeve (3) in the extended position of the sleeve (3) relative to the body (2). It is further specified that the axial movement of the sheath (3) relative to the body (2) is relative, that is to say that it can result either from a displacement of the sheath (3), or from a displacement of the body (2).
  • anvil (4) Inside the sheath (3) are housed, starting from the outer end of the latter, an anvil (4) of metal or other electrically conductive material, a piezoelectric element (5) and a stopper (6) also made of metal or other electrically conductive material.
  • the anvil (4) carries, at its end corresponding to the external end of the sheath (3), a radial tab (7) constituting one of the electrodes of this ignition device.
  • an axially movable striker (8) Inside the inner end of the sheath (3) and of the body (2), is also housed an axially movable striker (8), with which is associated a helical spring (9) compressed between it and the bottom (2a ) of the body (2).
  • this device results from the increase in the mutual engagement of the sheath (3) and of the body (2) against the springs (9) and (11), which are compressed by this increase in engagement means, not described here, having the effect of allowing the striker (8) to be driven by the sheath (3) to the vicinity of its re-entrant end of travel and its release when the sheath (3) reaches its end of travel re-entrant, so that the rebound of the spring (9) projects the striker (8) against the stopper (6).
  • These means are described in detail in European patent application No. 84420149.1 in the name of the Applicant.
  • the object of the present application relates to the axial fixing of the anvil (4), of the piezoelectric element (5) and of the stopper (6) in the sheath (3), it being recalled that this axial position must allow axial pressurization of these three elements, that is to say generate between them an axial stress.
  • the external transverse dimensions of the anvil (4), of the piezoelectric element (5) and the stopper (6) are slightly greater than those of each bore of the sleeve (3), respectively (3a) and (3b), provided to receive them. It follows that the engagement of these three organs (4,5,6) in the sleeve (3) generates, on each of them, a radial stress intended to ensure its axial fixing and also making it possible to generate between them the axial stress necessary for the operation of this device.
  • the axial immobilization of the stopper (6) in the direction of the arrow (12) is advantageously obtained by a shoulder (13) provided inside the bore (3b) of the sleeve ( 3) and cooperating with a shoulder (6a) of the stopper (6).
  • the conditions of axial stressing of the members (4,5,6) are improved by the use, for the production of the sheath (3), of a deformable elastic material such as, for example, a polyamide or a polyacetal.
  • a piezoelectric ignition device of simple constitution is thus obtained, easy to manufacture, since it is no longer necessary to inject an adhesive with all the drawbacks associated with this injection and which, moreover, has the advantage to allow regular and unsurprising manufacturing and, therefore, to obtain a reliable device and safe operation.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Lighters Containing Fuel (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

This device is of the type comprising a tubular sleeve (3), mounted axially movably between two extreme positions, in a tubular body (2) closed by a bottom (2a), this tubular sleeve (3) containing an anvil (4) made of electrically conductive material, a piezoelectric element (5) and a cylindrical element (6) forming a stop, these three members (4, 5, 6) being connected axially to the sleeve (3), being pressed axially against one another, a striker (8) associated with spring means (9) being provided to come to strike against the stop (6) at the reentrant limit of travel of the sleeve (3), the first travel part of which is turned to account for tensing the spring means (9) associated with the striker, while other spring means (11) tend normally to bring the sleeve (3) back into and keep it in its extreme outward position. The internal transverse dimensions of the sleeve (3) are slightly smaller than the transverse dimensions of the stop (6), of the piezoelectric element (5) and of the anvil (4) so that their axial fixing in the sleeve (3) is brought about by simple radial stress, turned to account for putting them under axial pressure. <IMAGE>

Description

La présente invention concerne un dispositif d'allumage piézo-électrique, notamment, quoique non exclusivement, pour briquet à gaz.The present invention relates to a piezoelectric ignition device, in particular, although not exclusively, for a gas lighter.

Les dispositifs d'allumage piézo-électrique comprennent, généralement, un fourreau tubulaire monté axialement mobile entre deux positions extrêmes, respectivement sortie et rentrée, dans un corps tubulaire fermé par un fond, à l'une de ses extrémités, ce fourreau tubulaire contenant, en partant de son extrémité externe, une enclume en matière conductrice de l'électricité, un élément piézo-électrique et un élément cylindrique formant butoir, également en une matière conductrice de l'électricité, ces trois organes étant liés axialement au fourreau en étant pressés axialement l'un contre i'autre, un percuteur associé à des moyens à ressort étant prévu pour venir frapper contre le butoir en fin de course rentrante du fourreau, dont la première partie de course est mise à profit pour bander les moyens à ressort associés au percuteur tandis que d'autres moyens à ressort tendent normalement à ramener et maintenir le fourreau dans sa position extrême sortie.The piezoelectric ignition devices generally comprise a tubular sheath mounted axially movable between two extreme positions, respectively extended and retracted, in a tubular body closed by a bottom, at one of its ends, this tubular sheath containing, starting from its outer end, an anvil made of electrically conductive material, a piezoelectric element and a cylindrical element forming a stopper, also made of an electrically conductive material, these three members being axially connected to the sheath by being pressed axially, one against the other, a striker associated with spring means being provided to strike against the stopper at the end of the re-entering stroke of the sleeve, the first part of which is used to band the associated spring means to the striker while other spring means normally tend to return and maintain the sheath in its extreme out position.

Dans ce type de dispositif, l'immobilisation axiale du cylindre métallique est généralement obtenue par un épaulement interne de l'alésage du fourreau tandis que celles de l'élément piézo-électrique et de l'enclume sont généralement obtenues à l'aide d'une résine adhésive. La couche formée par la résine adhésive présente l'avantage de constituer un bon isolant entre les deux pôles de l'élément piézo-électrique mais elle présente aussi l'inconvénient d'être longue et délicate à mettre en place, d'être fragile, de se briser facilement et, par sa rigidité, de limiter les déformations de l'élément piézo-électrique ce qui a pour effet d'affaiblir la puissance électrique de l'élément piézo-électrique jusqu'à rendre inutilisable l'allumeur.In this type of device, the axial immobilization of the metal cylinder is generally obtained by an internal shoulder of the bore of the sheath while those of the piezoelectric element and the anvil are generally obtained using an adhesive resin. The layer formed by the adhesive resin has the advantage of constituting a good insulator between the two poles of the piezoelectric element, but it also has the drawback of being long and difficult to install, of being fragile, to break easily and, by its rigidity, to limit the deformations of the piezoelectric element which has the effect of weakening the electric power of the piezoelectric element until rendering the igniter unusable.

La présente invention vise à remédier à tous ces inconvénients. A cet effet, dans le dispositif qu'elle concerne et qui est du type précité, les dimensions transversales intérieures du fourreau sont légèrement inférieures aux dimensions transversales du butoir, de l'élément piézo-électrique et de l'enclume, de telle sorte que leur fixation axiale dans le fourreau est assurée par simple coincement ou contrainte radiale, mis à profit pour engendrer leur mise sous pression axiale.The present invention aims to remedy all these drawbacks. To this end, in the device which it relates to and which is of the aforementioned type, the internal transverse dimensions of the sheath are slightly smaller than the transverse dimensions of the stopper, the piezoelectric element and the anvil, so that their axial fixation in the sheath is ensured by simple wedging or radial stress, used to generate their axial pressurization.

Pour améliorer encore la fixation du butoir métallique, de l'élément piézo-électrique et de l'enclume dans leur logement dans le fourreau, suivant une forme d'exécution simple de l'invention, le fourreau est réalisé en une matière élastiquement déformable améliorant la mise sous contrainte radiale des trois organes.To further improve the fixing of the metal buffer, the piezoelectric element and the anvil in their housing in the oven reau, according to a simple embodiment of the invention, the sheath is made of an elastically deformable material improving the radial stressing of the three members.

Une matière convenant parfaitement à la constitution du fourreau est un polyamide ou un polyacétaJ.A material which is perfectly suitable for making up the sheath is a polyamide or a polyacetaJ.

Pour améliorer encore la tenue des trois organes dans le fourreau en améliorant les conditions de leur mise sous pression axiale, suivant une forme d'exécution perfectionnée de l'invention, d'une part, l'enclume porte au moins un cran radial et, d'autre part, le fourreau comporte une fenêtre latêrale apte à recevoir et retenir le cran de l'enclume après mise en tension axiale du fourreau.To further improve the behavior of the three members in the sheath by improving the conditions of their axial pressurization, according to an improved embodiment of the invention, on the one hand, the anvil carries at least one radial notch and, on the other hand, the sheath has a lateral window capable of receiving and retaining the notch of the anvil after axial tensioning of the sheath.

De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé dont l'unique figure représente, à titre d'exemple non limitatif, une forme d'exécution de ce dispositif d'allumage piézo-électrique.In any case, the invention will be clearly understood with the aid of the description which follows, with reference to the appended schematic drawing, the single figure of which represents, by way of nonlimiting example, an embodiment of this device piezoelectric ignition.

Comme le montre cette figure, ce dispositif comprend essentiellement un corps tubulaire (2) fermé, à l'une de ses extrémités, par un fond (2a) et dans lequel est monté un fourreau tubulaire (3) axialement mobile entre deux positions extrêmes, respectivement sortie et rentrée. La figure du dessin montre le corps (2) et le fourreau (3) dans la position sortie du fourreau (3) par rapport au corps (2). Il est en outre précisé que le mouvement axial du fourreau (3) par rapport au corps (2) est relatif, c'est-à-dire qu'il peut résulter soit d'un déplacement du fourreau (3), soit d'un déplacement du corps (2).As this figure shows, this device essentially comprises a tubular body (2) closed, at one of its ends, by a bottom (2a) and in which is mounted a tubular sheath (3) axially movable between two extreme positions, exit and return respectively. The figure of the drawing shows the body (2) and the sleeve (3) in the extended position of the sleeve (3) relative to the body (2). It is further specified that the axial movement of the sheath (3) relative to the body (2) is relative, that is to say that it can result either from a displacement of the sheath (3), or from a displacement of the body (2).

A l'intérieur du fourreau (3) sont logés, en partant de l'extrémité externe de ce dernier, une enclume (4) en métal ou autre matière conductrice de l'électricité, un élément piézo-électrique (5) et un butoir (6) également en métal ou autre matière conductrice de l'électricité. L'enclume (4) porte, à son extrémité correspondant à l'extrémité externe du fourreau (3), une patte radiale (7) constituant l'une des électrodes de ce dispositif d'allumage.Inside the sheath (3) are housed, starting from the outer end of the latter, an anvil (4) of metal or other electrically conductive material, a piezoelectric element (5) and a stopper (6) also made of metal or other electrically conductive material. The anvil (4) carries, at its end corresponding to the external end of the sheath (3), a radial tab (7) constituting one of the electrodes of this ignition device.

Ces trois organes (4,5,6) sont liés axialement au fourreau (3) et doivent en outre être pressés axialement l'un contre l'autre.These three members (4,5,6) are connected axially to the sleeve (3) and must also be pressed axially against each other.

A l'intérieur de l'extrémité interne du fourreau (3) et du corps (2), est en outre logé un percuteur (8) axialement mobile, auquel est associé un ressort hélicoidal (9) comprimé entre lui et le fond (2a) du corps (2).Inside the inner end of the sheath (3) and of the body (2), is also housed an axially movable striker (8), with which is associated a helical spring (9) compressed between it and the bottom (2a ) of the body (2).

Un second ressort (11), concentrique au ressort (9), comprimé entre le fond (2a) du corps (2) et l'extrémité interne du fourreau (3), tend constamment à ramener et maintenir ce dernier dans sa position sortie telle qu'illustrée sur le dessin.A second spring (11), concentric with the spring (9), compressed between the bottom (2a) of the body (2) and the internal end of the sheath (3), constantly tends to return and maintain the latter in its extended position as as illustrated in the drawing.

Le fonctionnement de ce dispositif résulte de l'augmentation de l'engagement mutuel du fourreau (3) et du corps (2) à l'encontre des ressorts (9) et (11), qui sont comprimés par cette augmentation de l'engagement des moyens, non décrits ici, ayant pour effet de permettre l'entraînement du percuteur (8) par le fourreau (3) jusqu'au voisinage de sa fin de course rentrante et sa libération lorsque le fourreau (3) atteint sa fin de course rentrante, de telle sorte que la détente du ressort (9) projette le percuteur (8) contre le butoir (6). Ces moyens sont décrits de façon détaillée dans la demande de brevet européen n° 84420149.1 au nom de la Demanderesse.The operation of this device results from the increase in the mutual engagement of the sheath (3) and of the body (2) against the springs (9) and (11), which are compressed by this increase in engagement means, not described here, having the effect of allowing the striker (8) to be driven by the sheath (3) to the vicinity of its re-entrant end of travel and its release when the sheath (3) reaches its end of travel re-entrant, so that the rebound of the spring (9) projects the striker (8) against the stopper (6). These means are described in detail in European patent application No. 84420149.1 in the name of the Applicant.

L'objet de la présente demande concerne la fixation axiale de l'enclume (4), de l'élément piézo-électrique (5) et du butoir (6) dans le fourreau (3), étant rappelé que cette position axiale doit permettre une mise sous pression axiale de ces trois éléments, c'est-à-dire engendrer entre eux une contrainte axiale.The object of the present application relates to the axial fixing of the anvil (4), of the piezoelectric element (5) and of the stopper (6) in the sheath (3), it being recalled that this axial position must allow axial pressurization of these three elements, that is to say generate between them an axial stress.

Pour permettre d'obtenir ce résultat sans avoir recours à un quelconque adhésif introduit entre ces trois organes (4,5,6) et le fourreau (3), selon l'invention, les dimensions transversales externes de l'enclume (4), de l'élément piézo-électrique (5) et du butoir (6) sont légèrement supérieures à celles de chaque alésage du fourreau (3), respectivement (3a) et (3b), prévus pour les recevoir. Il en résulte que l'engagement de ces trois organes (4,5,6) dans le fourreau (3) engendre, sur chacun d'eux, une contrainte radiale destinée à assurer sa fixation axiale et permettant aussi d'engendrer entre eux la contrainte axiale nécessaire au fonctionnement de ce dispositif.To allow this result to be obtained without using any adhesive introduced between these three members (4,5,6) and the sheath (3), according to the invention, the external transverse dimensions of the anvil (4), of the piezoelectric element (5) and the stopper (6) are slightly greater than those of each bore of the sleeve (3), respectively (3a) and (3b), provided to receive them. It follows that the engagement of these three organs (4,5,6) in the sleeve (3) generates, on each of them, a radial stress intended to ensure its axial fixing and also making it possible to generate between them the axial stress necessary for the operation of this device.

Comme le montre la figure du dessin, l'immobilisation axiale du butoir (6) dans le sens de la flèche (12) est avantageusement obtenue par un épaulement (13) prévu à l'intérieur de l'alésage (3b) du fourreau (3) et coopérant avec un épaulement (6a) du butoir (6).As shown in the figure of the drawing, the axial immobilization of the stopper (6) in the direction of the arrow (12) is advantageously obtained by a shoulder (13) provided inside the bore (3b) of the sleeve ( 3) and cooperating with a shoulder (6a) of the stopper (6).

Les conditions de mise sous contrainte axiale des organes (4,5,6) sont améliorées par l'utilisation, pour la réalisation du fourreau (3), d'une matière élastique déformable telle que, par exemple, un polyamide ou un polyacétal.The conditions of axial stressing of the members (4,5,6) are improved by the use, for the production of the sheath (3), of a deformable elastic material such as, for example, a polyamide or a polyacetal.

Ces conditions sont encore améliorées en prévoyant, d'une part, sur l'enclume (4), au moins un et de préférence deux organes radiaux (14) diamétralement opposés présentant une rampe d'introduction (14a) et un cran d'arrêt (14b) et, d'autre part, des fenêtres (15) prévues dans la paroi de l'alésage (3a) du fourreau (3) servant à loger l'enclume (4), ces fenêtres (15) étant évidemment aménagées aux emplacements permettant l'engagement en elles des organes (14), après mise en tension axiale du fourreau (3).These conditions are further improved by providing, on the one hand, on the anvil (4), at least one and preferably two radially opposite radial members (14) having an insertion ramp (14a) and a stop notch (14b) and, on the other hand, windows (15) provided in the wall of the bore (3a) of the sheath (3) used to house the anvil (4), these windows (15) being obviously arranged at locations allowing the engagement in them of the members (14), after axial tensioning of the sheath (3).

On obtient ainsi un dispositif d'allumage piézo-électrique de constitution simple, facile à fabriquer, puisqu'il n'est plus nécessaire d'injecter un adhésif avec tous les inconvénients liés à cette injection et qui, en outre, présente l'avantage de permettre une fabrication régulière et sans surprise et, par conséquent, d'obtenir un dispositif fiable et d'un fonctionnement sûr.A piezoelectric ignition device of simple constitution is thus obtained, easy to manufacture, since it is no longer necessary to inject an adhesive with all the drawbacks associated with this injection and which, moreover, has the advantage to allow regular and unsurprising manufacturing and, therefore, to obtain a reliable device and safe operation.

Il faut noter d'ailleurs que la contrainte radiale engendrée par le fourreau (3) sur l'élément piézo-électrique (5) assure une parfaite isolation électrique entre les deux corps de ce dernier.It should also be noted that the radial stress generated by the sheath (3) on the piezoelectric element (5) ensures perfect electrical insulation between the two bodies of the latter.

Claims (4)

1 - Dispositif d'allumage piézo-électrique du type comprenant un fourreau tubulaire (3) monté axialement mobile entre deux positions extrêmes, respectivement sortie et rentrée, dans un corps tubulaire (2) fermé par un fond (2a), à l'une de ses extrémités, ce fourreau tubulaire (3) contenant, en partant de son extrémité externe, une enclume (4) en matière conductrice de l'électricité, un élément piézo-électrique (5) et un élément cylindrique (6) formant butoir, également en une matière conductrice de l'électricité, ces trois organes (4, 5, 6) étant liés axialement au fourreau (3) en étant pressés axialement l'un contre l'autre, un percuteur (8) associé à des moyens à ressort (9) étant prévu pour venir frapper contre le butoir (6) er fin de course rentrante du fourreau (3), dont la première partie de course est mise à profit pour bander les moyens à ressort (9) associés au percuteur tandis que d'autres moyens à ressort (11) tendent normalement à ramener et maintenir le fourreau (3) dans sa position extrême sortie, caractérisé en ce que les dimensions transversales intérieures du fourreau (3) sont légèrement inférieures aux dimensions transversales du butoir (6), de l'élément piézo-électrique (5) et de l'enclume (4), de telle sorte que leur fixation axiale dans le fourreau (3) est assurée par simple coincement ou contrainte radiale, mis à profit pour engendrer leur mise sous pression axiale.1 - Piezoelectric ignition device of the type comprising a tubular sheath (3) mounted axially movable between two extreme positions, respectively extended and retracted, in a tubular body (2) closed by a bottom (2a), one from its ends, this tubular sheath (3) containing, starting from its external end, an anvil (4) of electrically conductive material, a piezoelectric element (5) and a cylindrical element (6) forming a stopper, also in an electrically conductive material, these three members (4, 5, 6) being axially connected to the sheath (3) by being pressed axially one against the other, a striker (8) associated with means to spring (9) being provided to strike against the stopper (6) er returning end of the sleeve (3), the first part of which is used to band the spring means (9) associated with the striker while other spring means (11) normally tend to bring and hold the sheath (3) in its extreme extended position, characterized in that the internal transverse dimensions of the sleeve (3) are slightly smaller than the transverse dimensions of the stopper (6), of the piezoelectric element (5) and of the anvil (4), such that their axial fixing in the sleeve (3) is ensured by simple wedging or radial stress, used to generate their axial pressurization. 2 - Dispositif selon la revendication 1, caractérisé en ce que le fourreau (3) est réalisé en une matière élastiquement déformable améliorant la mise sous contrainte radiale des trois organes (4, 5, 6).2 - Device according to claim 1, characterized in that the sheath (3) is made of an elastically deformable material improving the radial stressing of the three members (4, 5, 6). 3 - Dispositif selon la revendication 2, caractérisé en ce que le fourreau (3) est en polyamide ou en polyacétal.3 - Device according to claim 2, characterized in that the sheath (3) is made of polyamide or polyacetal. 4 - Dispositif selon la revendication 2 ou la revendication 3, caractérisé en ce que le fourreau (3) présente, du côté de son extrémité interne, un épaulement d'arrêt (13) apte à coopérer avec un épaulement (6a) du butoir (6) pour s'opposer à son déplacement en direction (12) de l'extrémité interne du fourreau et en ce que d'une part, l'enclume (4) porte au moins un cran radial (14) et, d'autre part, le fourreau (3) comporte une fenêtre latérale (15) apte à recevoir et retenir le cran (14) de l'enclume (4) après mise en tension axiale du fourreau (3).4 - Device according to claim 2 or claim 3, characterized in that the sheath (3) has, on the side of its internal end, a stop shoulder (13) adapted to cooperate with a shoulder (6a) of the stopper ( 6) to oppose its movement in the direction (12) of the internal end of the sheath and in that on the one hand, the anvil (4) carries at least one radial notch (14) and, on the other hand, the sheath (3) has a side window (15) capable of receiving and retaining the notch (14) of the anvil (4) after axial tensioning of the sheath (3).
EP85420078A 1984-05-28 1985-04-29 Piezoelectric ignition device Withdrawn EP0163586A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP77093/84U 1984-05-28
JP1984077093U JPS60190056U (en) 1984-05-28 1984-05-28 Piezoelectric element mounting device in piezoelectric igniter

Publications (2)

Publication Number Publication Date
EP0163586A2 true EP0163586A2 (en) 1985-12-04
EP0163586A3 EP0163586A3 (en) 1986-12-17

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EP85420078A Withdrawn EP0163586A3 (en) 1984-05-28 1985-04-29 Piezoelectric ignition device

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EP (1) EP0163586A3 (en)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2650654A1 (en) * 1989-08-02 1991-02-08 Laforest Sa Piezoelectric mechanism for gas cigarette lighters

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH683455A5 (en) * 1991-03-13 1994-03-15 Laforest Bic Sa A piezoelectric mechanism for gas lighters.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1182762A (en) * 1968-02-16 1970-03-04 Brush Clevite Company Ltd Piezoelectric Unit
FR2028096A1 (en) * 1969-01-10 1970-10-09 Brush Clevite Cy Ltd
DE2127824A1 (en) * 1970-06-05 1972-04-13 Vernitron Ltd., Thornhill, Southampton, Hampshire (Großbritannien) Piezoelectric gas lighter
US3771943A (en) * 1971-03-23 1973-11-13 Ranson Corp Lighter
FR2270526A1 (en) * 1974-05-09 1975-12-05 Rv Const Electriques

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1182762A (en) * 1968-02-16 1970-03-04 Brush Clevite Company Ltd Piezoelectric Unit
FR2028096A1 (en) * 1969-01-10 1970-10-09 Brush Clevite Cy Ltd
DE2127824A1 (en) * 1970-06-05 1972-04-13 Vernitron Ltd., Thornhill, Southampton, Hampshire (Großbritannien) Piezoelectric gas lighter
US3771943A (en) * 1971-03-23 1973-11-13 Ranson Corp Lighter
FR2270526A1 (en) * 1974-05-09 1975-12-05 Rv Const Electriques

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2650654A1 (en) * 1989-08-02 1991-02-08 Laforest Sa Piezoelectric mechanism for gas cigarette lighters

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PT80442A (en) 1985-06-01
JPS60190056U (en) 1985-12-16
EP0163586A3 (en) 1986-12-17
AU4301585A (en) 1985-12-05
DK203885D0 (en) 1985-05-08
DK203885A (en) 1985-11-29
PT80442B (en) 1986-10-28

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