EP2402707A1 - Anti-adhesion raised patterns for a safety and arming device - Google Patents

Anti-adhesion raised patterns for a safety and arming device Download PDF

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Publication number
EP2402707A1
EP2402707A1 EP11290292A EP11290292A EP2402707A1 EP 2402707 A1 EP2402707 A1 EP 2402707A1 EP 11290292 A EP11290292 A EP 11290292A EP 11290292 A EP11290292 A EP 11290292A EP 2402707 A1 EP2402707 A1 EP 2402707A1
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EP
European Patent Office
Prior art keywords
reliefs
cover
integral
arming device
rails
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Granted
Application number
EP11290292A
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German (de)
French (fr)
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EP2402707B1 (en
Inventor
Christian Pisella
Marjorie Trzmiel
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Nexter Munitions SA
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Nexter Munitions SA
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Priority to PL11290292T priority Critical patent/PL2402707T3/en
Publication of EP2402707A1 publication Critical patent/EP2402707A1/en
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Publication of EP2402707B1 publication Critical patent/EP2402707B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/34—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by a blocking-member in the pyrotechnic or explosive train between primer and main charge

Definitions

  • the technical field of the invention is that of microelectromechanical projectile safety and arming devices.
  • the safety and arming devices are intended to isolate the detonator and the explosive charge of a projectile and to allow communication between these two components of the pyrotechnic chain only when (according to the standards such as STANAG # 4157) at least two distinct shooting environment conditions appear.
  • MEMS technology Micro Electro Mechanical Systems
  • the insulation between the detonator and the loading is carried out most often by means of a plate also called screen, drawer or barrier, obstructing a light making communicate these two components of the pyrotechnic chain.
  • a plate also called screen, drawer or barrier, obstructing a light making communicate these two components of the pyrotechnic chain.
  • the barrier is then subjected to undesirable adhesion effects for optimal, safe and reliable operation of the DSA.
  • the invention proposes to solve the problems of adhesion of thick moving parts of the barrier type by equipping the areas of the DSA in contact with the barrier means reducing adhesion and friction.
  • the proposed solution is to greatly reduce the contact surfaces between the barrier or other moving elements of the DSA that are in contact with the surfaces of the substrate.
  • the subject of the invention is thus a safety and arming device of microelectromechanical technology for a projectile comprising at least three substrate layers: a bottom, a cover and an intermediate layer comprising at least one moving part with respect to different substrate layers, safety and arming device characterized in that the bottom and the cover comprise reliefs, the reliefs being regularly distributed on the bottom and the cover so that the moving part is always, during its displacement , maintained in equilibrium between the reliefs of the bottom and the reliefs of the lid, the reliefs secured to the bottom being in contact with a lower face of the movable part and the integral reliefs of the lid being in contact with an upper face of the movable part.
  • the reliefs are made in the form of at least two rails integral with the bottom and at least two rails secured to the cover, rails parallel thereto and oriented logitudinally. following the path that the moving element must follow.
  • the reliefs are made under the form of studs, evenly distributed over all the surfaces of the bottom and the cover traversed by the movable element.
  • the studs may be in the form of half-spheres.
  • the figure 1 schematically shows a security device and armament 1 of MEMS technology which comprises three layers, namely a bottom 2, a cover 3 and an intermediate layer 4.
  • the device is pierced from one side by a light 5 (visible on the figure 2 ) for passing a trigger element of the pyrotechnic chain as an optical signal for example.
  • the intermediate layer 4 comprises a frame 4a delimiting a rectangular cavity 8 in which there is a barrier which will be referred to hereinafter as the mobile part 6.
  • This device is made according to the MEMS technologies which are well known to those skilled in the art, that is to say which implement micro-machining or micro-etching of a substrate (for example silicon). Concretely the intermediate layer 4 will be performed independently and the movable portion 6 will be machined at the same time as the frame 4a.
  • the bottom 2 and the cover 3 will be machined elsewhere and the three layers 2, 3 and 4 will then be assembled by gluing. It is clear that MEMS components are made using techniques similar to those of integrated circuits. The device 1 is therefore not made alone but simultaneously to many copies on a common medium (generally called Wafer).
  • the assembly of the intermediate layer 4, the bottom 2 and the lid 3 will be made simultaneously for several devices by assembling three Wafers to each other. At the same time, many devices will be realized.
  • the bottom 2 of the device and the lid 3 have on their inner face reliefs 7a and 7b having an anti-adhesion or anti-friction function. These reliefs are in contact with the lower face of the movable part 6 for the bottom 2 and with the upper face of the movable part 6 for the cover 3.
  • the figure 2 shows the device 1 in the armed position, ie the moving part 6 not covering the light 5.
  • a complete security and arming device includes other means, such as motor means, locks and springs ...
  • the object of the present invention is not the complete mechanism of such a device and reference may be made to the patent texts: EP1780495 , EP1780496 , EP2077431 and FR2932561 which describe such MEMS devices more fully.
  • the movement of the mobile part may be obtained for example by micro-motor means (not shown), such as electrostatic combs.
  • the anti-adhesion reliefs are rails 7a and 7b of square section which are placed parallel to each other and over the entire length of the cavity 8 of the intermediate layer 4, length on which the mobile part 6 is called to move.
  • the total surface of the rails 7 in contact with the movable portion 6 is significantly lower than the area of the upper and lower faces of the movable portion 6. It will also be noted that the movable portion 6 is pinched between the rails 7b carried by the cover 3 and the rails 7a carried by the bottom 2. The movement of the movable part 6 is thus guided by both the bottom and the cover and the reduced contact surface can greatly reduce friction.
  • the means of the invention make it possible to position the device indifferently on its lower face, its upper face or even on its edge.
  • the mobile part 6 is in all cases maintained between the reliefs 7a of the bottom and 7b of the lid.
  • FIGS 3 and 4 show an alternative embodiment of the first embodiment in which the rails 7 are trapezoidal section. It goes without saying that rails 7 of triangular or semi-circular section are also conceivable (embodiments not shown).
  • the movable part 6 is, for all the positions it occupies during its displacement, maintained in equilibrium between the reliefs 7a integral with the bottom 2 and the reliefs 7b integral with the cover 3.
  • the skilled person will distribute the reliefs evenly on all the surfaces of the bottom 2 and lid 3 which receive the part 6.
  • the number and spacing of the reliefs will depend on the dimensions of this moving part 6.
  • Figures 5 and 6 show a device according to a second embodiment.
  • This mode differs from the previous one only in the structure of the anti-adhesion reliefs which are here not rails but pads 9a and 9b, regularly distributed on all the surfaces of the bottom 2 and the cover 3 traversed by the movable element 6.
  • the studs here have the shape of half-spheres and they are evenly distributed over the entire surface of the bottom 2 and the cover 3 in the manner of a carpet of spikes.
  • the pads 9a are integral with the bottom 2 and the pads 9b are integral with the cover 3.

Abstract

The device (1) has a bottom layer (2), a top layer (3) and an intermediate layer (4) incorporating a mobile part (6) with respect to different layers of substrate. The bottom and top layers incorporate raised patterns formed of rails (7a, 7b) and studs. The patterns are evenly spaced over the bottom and the top layers such that the mobile part is maintained in equilibrium between the patterns of the bottom and the top layers. The patterns of the bottom layer are in contact with a lower face of the mobile part, and the patterns of the top layer contact an upper face of the mobile part.

Description

Le domaine technique de l'invention est celui des dispositifs de sécurité et d'armement de technologie micro électromécanique pour projectile.The technical field of the invention is that of microelectromechanical projectile safety and arming devices.

Les dispositifs de sécurité et d'armement (ou DSA) ont pour but d'isoler le détonateur et le chargement explosif d'un projectile et de ne permettre la communication entre ces deux composantes de la chaîne pyrotechnique qu'exclusivement lorsque (selon les normes actuelles telles que le STANAG n°4157) au moins deux conditions d'environnement de tir distinctes apparaissent.The safety and arming devices (or DSA) are intended to isolate the detonator and the explosive charge of a projectile and to allow communication between these two components of the pyrotechnic chain only when (according to the standards such as STANAG # 4157) at least two distinct shooting environment conditions appear.

On cherche aujourd'hui à réaliser ces dispositifs à l'aide de la technologie MEMS (Micro Electro Mechanical Systems) qui permet une forte miniaturisation propice à l'intégration sur des projectiles de moyen calibre par exemple. L'isolation entre détonateur et chargement est réalisée le plus souvent au moyen d'une plaque aussi appelée écran, tiroir ou barrière, obstruant une lumière faisant communiquer ces deux composantes de la chaîne pyrotechnique. On pourra considérer le brevet EP1780496 qui décrit un tel dispositif connu.Today we seek to achieve these devices using MEMS technology (Micro Electro Mechanical Systems) which allows a strong miniaturization suitable for integration on medium caliber projectiles for example. The insulation between the detonator and the loading is carried out most often by means of a plate also called screen, drawer or barrier, obstructing a light making communicate these two components of the pyrotechnic chain. We can consider the patent EP1780496 which describes such a known device.

Ces barrières pouvant arrêter un effet pyrotechnique sont de relativement forte épaisseur au regard de la taille d'un dispositif de sécurité d'armement MEMS. Or, l'échelle à laquelle sont construits les MEMS fait que les comportements des mécanismes diffèrent sensiblement des comportements connus pour les mécanismes réalisés à l'échelle centimétrique.These barriers can stop a pyrotechnic effect are relatively thick in view of the size of a MEMS arming security device. However, the scale at which the MEMS are constructed makes that the behavior of the mechanisms differs substantially from the known behaviors for the mechanisms made at the centimetric scale.

Ainsi, les phénomènes d'adhérence pour les pièces épaisses deviennent prépondérants. A l'échelle MEMS, deux surfaces planes mises en contact adhérent l'une à l'autre relativement fortement ce qui gène les mouvements relatifs suivant ces plans. Ce problème est particulièrement présent lorsque l'élément mobile est en contact avec le substrat du MEMS.Thus, the phenomena of adhesion for thick parts become preponderant. At the MEMS scale, two plane surfaces put in contact adhere to each other relatively strongly which causes the relative movements in these planes. This problem is particularly present when the movable element is in contact with the MEMS substrate.

La barrière est alors soumise à des effets d'adhérence indésirables pour un fonctionnement optimal, sûr et fiable du DSA.The barrier is then subjected to undesirable adhesion effects for optimal, safe and reliable operation of the DSA.

L'invention se propose de solutionner les problèmes d'adhérence des pièces mobiles de forte épaisseur du type barrière en équipant les zones du DSA en contact avec la barrière de moyens réduisant l'adhérence et les frottements.The invention proposes to solve the problems of adhesion of thick moving parts of the barrier type by equipping the areas of the DSA in contact with the barrier means reducing adhesion and friction.

La solution proposée consiste à réduire fortement les surfaces de contact entre la barrière ou d'autres éléments mobiles du DSA qui sont en contact avec les surfaces du substrat.The proposed solution is to greatly reduce the contact surfaces between the barrier or other moving elements of the DSA that are in contact with the surfaces of the substrate.

L'invention a ainsi pour objet un dispositif de sécurité et d'armement de technologie micro électromécanique pour un projectile comportant au moins trois couches de substrat: un fond, un couvercle ainsi qu'une couche intermédiaire comportant au moins une partie mobile par rapport aux différentes couches de substrat, dispositif de sécurité et d'armement caractérisé en ce que le fond et le couvercle comportent des reliefs, les reliefs étant régulièrement répartis sur le fond et le couvercle de telle sorte que la partie mobile soit toujours, lors de son déplacement, maintenue en équilibre entre les reliefs du fond et les reliefs du couvercle, les reliefs solidaires du fond étant en contact avec une face inférieure de la partie mobile et les reliefs solidaires du couvercle étant en contact avec une face supérieure de la partie mobile.The subject of the invention is thus a safety and arming device of microelectromechanical technology for a projectile comprising at least three substrate layers: a bottom, a cover and an intermediate layer comprising at least one moving part with respect to different substrate layers, safety and arming device characterized in that the bottom and the cover comprise reliefs, the reliefs being regularly distributed on the bottom and the cover so that the moving part is always, during its displacement , maintained in equilibrium between the reliefs of the bottom and the reliefs of the lid, the reliefs secured to the bottom being in contact with a lower face of the movable part and the integral reliefs of the lid being in contact with an upper face of the movable part.

Selon un premier mode de réalisation de ce dispositif de sécurité et d'armement, les reliefs sont réalisés sous la forme d'au moins deux rails solidaires du fond et d'au moins deux rails solidaires du couvercle, rails parallèles entres eux et orientés logitudinalement suivant la trajectoire que doit suivre l'élément mobile.According to a first embodiment of this safety and arming device, the reliefs are made in the form of at least two rails integral with the bottom and at least two rails secured to the cover, rails parallel thereto and oriented logitudinally. following the path that the moving element must follow.

Selon un second mode de réalisation de ce dispositif de sécurité et d'armement, les reliefs sont réalisés sous la forme de plots, régulièrement répartis sur toutes les surfaces du fond et du couvercle parcourues par l'élément mobile.According to a second embodiment of this safety and arming device, the reliefs are made under the form of studs, evenly distributed over all the surfaces of the bottom and the cover traversed by the movable element.

Selon une variante, les plots pourront avoir la forme de demi sphères.According to one variant, the studs may be in the form of half-spheres.

L'invention sera mieux comprise à la lecture du complément de description suivante en référence aux dessins annexés dans lesquels :

  • la figure 1 représente un dispositif de sécurité et d'armement selon un premier mode de réalisation et suivant une vue en coupe transversale suivant le plan AA, plan de coupe dont la trace est repérée à la figure 2,
  • la figure 2 représente le dispositif de sécurité et d'armement selon ce premier mode de réalisation, dispositif en position armée, et représenté en coupe longitudinale suivant le plan BB, plan de coupe dont la trace est repérée à la figure 1,
  • la figure 3 représente le dispositif de sécurité d'armement selon une variante du premier mode de réalisation représenté en coupe transversale suivant le plan CC, plan de coupe dont la trace est repérée à la figure 4,
  • la figure 4 représente cette même variante du dispositif de sécurité d'armement représenté en coupe longitudinale suivant le plan DD, plan de coupe dont la trace est repérée à la figure 3,
  • la figure 5 représente le dispositif de sécurité d'armement selon un second mode de réalisation et représenté en coupe transversale suivant le plan EE, plan de coupe dont la trace est repérée à la figure 6, et
  • la figure 6 représente ce second mode de réalisation, en coupe longitudinale suivant le plan FF, plan dont la trace est repérée à la figure 5.
The invention will be better understood on reading the additional description which follows with reference to the appended drawings in which:
  • the figure 1 represents a safety and arming device according to a first embodiment and in a cross-sectional view along the plane AA, section plane whose trace is marked at the figure 2 ,
  • the figure 2 represents the safety and arming device according to this first embodiment, device in the armed position, and shown in longitudinal section along the plane BB, cutting plane whose trace is marked at the figure 1 ,
  • the figure 3 represents the arming safety device according to a variant of the first embodiment shown in cross-section along the plane CC, section plane whose trace is marked at the figure 4 ,
  • the figure 4 represents the same variant of the arming security device shown in longitudinal section along the plane DD, cutting plane whose trace is located at the figure 3 ,
  • the figure 5 represents the arming safety device according to a second embodiment and shown in cross section along the plane EE, section plane whose trace is marked at the figure 6 , and
  • the figure 6 represents this second embodiment, in longitudinal section along the plane FF, plane whose trace is located at the figure 5 .

La figure 1 montre de façon schématique un dispositif de sécurité et d'armement 1 de technologie MEMS qui comporte trois couches, à savoir un fond 2, un couvercle 3 et une couche intermédiaire 4. Le dispositif est percé de part en part par une lumière 5 (visible sur la figure 2) destinée à laisser passer un élément déclencheur de la chaîne pyrotechnique comme un signal optique par exemple. La couche intermédiaire 4 comporte un cadre 4a délimitant une cavité rectangulaire 8 dans laquelle se situe une barrière qui sera dénommée dans la suite du document partie mobile 6.The figure 1 schematically shows a security device and armament 1 of MEMS technology which comprises three layers, namely a bottom 2, a cover 3 and an intermediate layer 4. The device is pierced from one side by a light 5 (visible on the figure 2 ) for passing a trigger element of the pyrotechnic chain as an optical signal for example. The intermediate layer 4 comprises a frame 4a delimiting a rectangular cavity 8 in which there is a barrier which will be referred to hereinafter as the mobile part 6.

Ce dispositif est réalisé suivant les technologies MEMS qui sont bien connues de l'Homme du Métier, c'est à dire qui mettent en oeuvre des micro-usinages ou micro-gravures d'un substrat (par exemple le silicium). Concrètement la couche intermédiaire 4 sera réalisée de façon indépendante et la partie mobile 6 sera usinée en même temps que le cadre 4a.This device is made according to the MEMS technologies which are well known to those skilled in the art, that is to say which implement micro-machining or micro-etching of a substrate (for example silicon). Concretely the intermediate layer 4 will be performed independently and the movable portion 6 will be machined at the same time as the frame 4a.

Le fond 2 et le couvercle 3 seront usinés par ailleurs et les trois couches 2, 3 et 4 seront ensuite assemblées par collage. Il est clair que les composants MEMS sont réalisés suivant des techniques proches de celles des circuits intégrés. Le dispositif 1 n'est donc pas réalisé seul mais simultanément à de nombreux exemplaires sur un support commun (dénommé généralement Wafer).The bottom 2 and the cover 3 will be machined elsewhere and the three layers 2, 3 and 4 will then be assembled by gluing. It is clear that MEMS components are made using techniques similar to those of integrated circuits. The device 1 is therefore not made alone but simultaneously to many copies on a common medium (generally called Wafer).

L'assemblage de la couche intermédiaire 4, du fond 2 et du couvercle 3 sera réalisé simultanément pour plusieurs dispositifs par l'assemblage de trois Wafers les uns aux autres. On réalisera ainsi simultanément de nombreux dispositifs.The assembly of the intermediate layer 4, the bottom 2 and the lid 3 will be made simultaneously for several devices by assembling three Wafers to each other. At the same time, many devices will be realized.

Bien entendu des moyens de maintien temporaires (non représentés) sont prévus entre la partie mobile 6 et le cadre 4a afin de permettre les positionnements et assemblage des Wafers les uns sur les autres.Of course temporary holding means (not shown) are provided between the movable portion 6 and the frame 4a to allow positioning and assembly of Wafers on each other.

Si on considère donc maintenant un seul dispositif 1, le fond 2 du dispositif ainsi que le couvercle 3 comportent sur leur face interne des reliefs 7a et 7b ayant une fonction anti-adhérence ou anti frottement. Ces reliefs sont en contact avec la face inférieure de la partie mobile 6 pour le fond 2 et avec la face supérieure de la partie mobile 6 pour le couvercle 3.If we now consider only one device 1, the bottom 2 of the device and the lid 3 have on their inner face reliefs 7a and 7b having an anti-adhesion or anti-friction function. These reliefs are in contact with the lower face of the movable part 6 for the bottom 2 and with the upper face of the movable part 6 for the cover 3.

La figure 2 montre le dispositif 1 en position armée, c'est à dire la partie mobile 6 ne couvrant pas la lumière 5.The figure 2 shows the device 1 in the armed position, ie the moving part 6 not covering the light 5.

Pour la clarté de la présentation de l'invention, le dispositif représenté est ici extrêmement simplifié car on n'a fait figurer que la partie mobile 6 et la lumière 5. Il est bien entendu qu'un dispositif de sécurité et d'armement complet comporte d'autres moyens, tels que des moyens moteurs, des verrous et des ressorts...For the clarity of the presentation of the invention, the device shown here is extremely simplified because it has shown only the movable portion 6 and the light 5. It is understood that a complete security and arming device includes other means, such as motor means, locks and springs ...

L'objet de la présente invention n'est pas le mécanisme complet d'un tel dispositif et on pourra se reporter aux textes des brevets : EP1780495 , EP1780496 , EP2077431 et FR2932561 qui décrivent de tels dispositifs MEMS de façon plus complète. Le mouvement de la partie mobile pourra être obtenu par exemple par des moyens micro-moteurs (non représentés), tels que des peignes électrostatiques.The object of the present invention is not the complete mechanism of such a device and reference may be made to the patent texts: EP1780495 , EP1780496 , EP2077431 and FR2932561 which describe such MEMS devices more fully. The movement of the mobile part may be obtained for example by micro-motor means (not shown), such as electrostatic combs.

Selon ce premier mode de réalisation, les reliefs antiadhérence sont des rails 7a et 7b de section carrée qui sont placés parallèlement entre eux et sur toute la longueur de la cavité 8 de la couche intermédiaire 4, longueur sur laquelle la partie mobile 6 est appelée à se déplacer.According to this first embodiment, the anti-adhesion reliefs are rails 7a and 7b of square section which are placed parallel to each other and over the entire length of the cavity 8 of the intermediate layer 4, length on which the mobile part 6 is called to move.

On notera que la surface totale des rails 7 en contact avec la partie mobile 6 est notablement plus faible que l'aire des faces supérieure et inférieure de la partie mobile 6. On notera aussi que la partie mobile 6 est pincée entre les rails 7b portés par le couvercle 3 et les rails 7a portés par le fond 2. Le mouvement de la partie mobile 6 est donc guidé à la fois par le fond et le couvercle et la surface de contact réduite permet de réduire fortement les frottements.Note that the total surface of the rails 7 in contact with the movable portion 6 is significantly lower than the area of the upper and lower faces of the movable portion 6. It will also be noted that the movable portion 6 is pinched between the rails 7b carried by the cover 3 and the rails 7a carried by the bottom 2. The movement of the movable part 6 is thus guided by both the bottom and the cover and the reduced contact surface can greatly reduce friction.

On notera que les moyens de l'invention permettent de positionner le dispositif indifféremment sur sa face inférieure, sa face supérieure voire même sur sa tranche. La partie mobile 6 est dans tous les cas maintenue entre les reliefs 7a du fond et 7b du couvercle.It will be noted that the means of the invention make it possible to position the device indifferently on its lower face, its upper face or even on its edge. The mobile part 6 is in all cases maintained between the reliefs 7a of the bottom and 7b of the lid.

Les figures 3 et 4 montrent une variante de réalisation du premier mode de réalisation dans laquelle les rails 7 sont de section trapézoïdale. Il va de soi que des rails 7 de section triangulaire ou semi circulaire sont également envisageables (modes de réalisation non représentés).The Figures 3 and 4 show an alternative embodiment of the first embodiment in which the rails 7 are trapezoidal section. It goes without saying that rails 7 of triangular or semi-circular section are also conceivable (embodiments not shown).

Conformément à l'invention, il est donc préférable que la partie mobile 6 soit, pour toutes les positions qu'elle occupe lors de son déplacement, maintenue en équilibre entre les reliefs 7a solidaires du fond 2 et les reliefs 7b solidaires du couvercle 3.According to the invention, it is therefore preferable that the movable part 6 is, for all the positions it occupies during its displacement, maintained in equilibrium between the reliefs 7a integral with the bottom 2 and the reliefs 7b integral with the cover 3.

Il est aisé d'obtenir un tel équilibre avec des rails s'étendant le long de toute la cavité 8 et régulièrement répartis sur la largeur de cette cavité.It is easy to obtain such a balance with rails extending along the entire cavity 8 and regularly distributed over the width of this cavity.

Avec des reliefs ayant d'autre formes (comme cela sera décrit plus loin en référence aux figures 5 et 6), il suffit là encore que la répartition soit telle que la partie mobile 6 soit toujours maintenue en équilibre entre les reliefs 7a solidaires du fond 2 et les reliefs 7b solidaires du couvercle 3.With reliefs having other shapes (as will be described later with reference to Figures 5 and 6 ), it suffices again that the distribution is such that the movable part 6 is always maintained in equilibrium between the reliefs 7a integral with the bottom 2 and the reliefs 7b integral with the lid 3.

Il suffit pour chaque position de la partie mobile 6 de considérer le polygone de sustentation de cette partie mobile qui est formé par les reliefs sur le fond 2 d'une part et le polygone de sustentation formé par les reliefs du couvercle 3 d'autre part.It suffices for each position of the mobile part 6 to consider the support polygon of this movable part which is formed by the reliefs on the bottom 2 on the one hand and the support polygon formed by the reliefs of the lid 3 on the other hand .

Si ces deux polygones de sustentation ont toujours une partie commune (en considérant la projection géométrique de ces deux polygones sur le plan de la partie mobile), la partie mobile est effectivement maintenue (ou pincée) entre fond 2 et couvercle 3.If these two levitation polygons always have a common part (considering the geometric projection of these two polygons on the plane of the moving part), the moving part is actually maintained (or pinched) between bottom 2 and lid 3.

Concrètement et de façon simple, l'Homme du Métier répartira les reliefs de façon régulière sur toute les surfaces du fond 2 et du couvercle 3 qui reçoivent la partie mobile 6. Le nombre et l'espacement des reliefs dépendra des dimensions de cette partie mobile 6.Specifically and in a simple manner, the skilled person will distribute the reliefs evenly on all the surfaces of the bottom 2 and lid 3 which receive the part 6. The number and spacing of the reliefs will depend on the dimensions of this moving part 6.

A titre d'exemple les figures 5 et 6 montrent un dispositif selon un second mode de réalisation.For example, Figures 5 and 6 show a device according to a second embodiment.

Ce mode ne diffère du précédent que par la structure des reliefs antiadhérence qui sont ici non pas des rails mais des plots 9a et 9b, régulièrement répartis sur toutes les surfaces du fond 2 et du couvercle 3 parcourues par l'élément mobile 6.This mode differs from the previous one only in the structure of the anti-adhesion reliefs which are here not rails but pads 9a and 9b, regularly distributed on all the surfaces of the bottom 2 and the cover 3 traversed by the movable element 6.

Les plots ont ici la forme de demi-sphères et ils sont répartis de manière homogène sur toute la surface du fond 2 et du couvercle 3 à la manière d'un tapis de picots. Les plots 9a sont solidaires du fond 2 et les plots 9b sont solidaires du couvercle 3.The studs here have the shape of half-spheres and they are evenly distributed over the entire surface of the bottom 2 and the cover 3 in the manner of a carpet of spikes. The pads 9a are integral with the bottom 2 and the pads 9b are integral with the cover 3.

On notera que la surface de contact entre fond 2, partie mobile 6 et couvercle 3 est limitée aux seuls points de tangence entre les demi-sphères et la partie mobile 6.It will be noted that the contact surface between the bottom 2, the moving part 6 and the cover 3 is limited only to the points of tangency between the half-spheres and the movable part 6.

Il est bien entendu possible de donner aux plots des formes différentes : pyramidales, coniques ou tronconiques.It is of course possible to give the pads different shapes: pyramidal, conical or frustoconical.

Claims (4)

Dispositif de sécurité et d'armement (1) de technologie micro électromécanique pour un projectile comportant au moins trois couches de substrat: un fond (2), un couvercle (3) ainsi qu'une couche intermédiaire (4) comportant au moins une partie mobile (6) par rapport aux différentes couches de substrat, dispositif de sécurité et d'armement caractérisé en ce que le fond (2) et le couvercle (3) comportent des reliefs (7a, 7b, 9a, 9b), les reliefs (7a, 7b, 9a, 9b) étant régulièrement répartis sur le fond et le couvercle de telle sorte que la partie mobile (6) soit toujours, lors de son déplacement, maintenue en équilibre entre les reliefs (7a, 9a) du fond (2) et les reliefs (7b, 9b) du couvercle (3), les reliefs (7a, 9a) solidaires du fond étant en contact avec une face inférieure de la partie mobile (6) et les reliefs (7b, 9b) solidaires du couvercle (3) étant en contact avec une face supérieure de la partie mobile (6).Security and arming device (1) of microelectromechanical technology for a projectile comprising at least three substrate layers: a bottom (2), a cover (3) and an intermediate layer (4) comprising at least a part mobile device (6) with respect to the different substrate layers, safety and arming device, characterized in that the base (2) and the cover (3) comprise reliefs (7a, 7b, 9a, 9b), the reliefs ( 7a, 7b, 9a, 9b) being evenly distributed on the bottom and the cover so that the moving part (6) is always, during its displacement, maintained in equilibrium between the reliefs (7a, 9a) of the bottom (2 ) and the reliefs (7b, 9b) of the lid (3), the reliefs (7a, 9a) integral with the bottom being in contact with a lower face of the movable part (6) and the reliefs (7b, 9b) integral with the lid (3) being in contact with an upper face of the movable part (6). Dispositif de sécurité (1) et d'armement selon la revendication 1, caractérisé en ce que les reliefs (7a, 7b) sont réalisés sous la forme d'au moins deux rails (7a) solidaire du fond et d'au moins deux rails (7b) solidaires du couvercle, rails parallèles entres eux et orientés logitudinalement suivant la trajectoire que doit suivre l'élément mobile (6).Security device (1) and arming device according to claim 1, characterized in that the reliefs (7a, 7b) are in the form of at least two rails (7a) integral with the bottom and at least two rails (7b) integral with the cover, parallel rails between them and oriented logitudinalement along the path that must follow the movable member (6). Dispositif de sécurité et d'armement (1) selon la revendication 1, caractérisé en ce que les reliefs (9a, 9b) sont réalisés sous la forme de plots, régulièrement répartis sur toutes les surfaces du fond et du couvercle parcourues par l'élément mobile.Security and arming device (1) according to claim 1, characterized in that the reliefs (9a, 9b) are made in the form of studs, regularly distributed over all the surfaces of the bottom and the cover traversed by the element. mobile. Dispositif de sécurité et d'armement (1) de technologie micro électromécanique selon la revendication 3, caractérisé en ce que les plots ont la forme de demi sphères.Security and arming device (1) of microelectromechanical technology according to claim 3, characterized in that the pads have the shape of half-spheres.
EP11290292.9A 2010-07-02 2011-06-30 Anti-adhesion raised patterns for a safety and arming device Active EP2402707B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11290292T PL2402707T3 (en) 2010-07-02 2011-06-30 Anti-adhesion raised patterns for a safety and arming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1002813A FR2962209B1 (en) 2010-07-02 2010-07-02 RELIEF ANTI ADHERENCE FOR SAFETY AND ARMING DEVICE

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EP2402707A1 true EP2402707A1 (en) 2012-01-04
EP2402707B1 EP2402707B1 (en) 2013-08-07

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US (1) US9194682B2 (en)
EP (1) EP2402707B1 (en)
ES (1) ES2431937T3 (en)
FR (1) FR2962209B1 (en)
PL (1) PL2402707T3 (en)

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CN114061386A (en) * 2021-11-17 2022-02-18 南京理工大学 MOEMS fuse safety device with state monitoring function

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Also Published As

Publication number Publication date
US20120000388A1 (en) 2012-01-05
FR2962209A1 (en) 2012-01-06
EP2402707B1 (en) 2013-08-07
ES2431937T3 (en) 2013-11-28
FR2962209B1 (en) 2012-07-13
PL2402707T3 (en) 2013-12-31
US9194682B2 (en) 2015-11-24

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