EP2462403B1 - Safety priming device for ammunition - Google Patents

Safety priming device for ammunition Download PDF

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Publication number
EP2462403B1
EP2462403B1 EP10725123.3A EP10725123A EP2462403B1 EP 2462403 B1 EP2462403 B1 EP 2462403B1 EP 10725123 A EP10725123 A EP 10725123A EP 2462403 B1 EP2462403 B1 EP 2462403B1
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EP
European Patent Office
Prior art keywords
slide
recess
axis
closure element
priming
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EP10725123.3A
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German (de)
French (fr)
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EP2462403A1 (en
Inventor
Jean-Luc Renaud-Bezot
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Junghans T2M SAS
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Junghans T2M SAS
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Publication of EP2462403A1 publication Critical patent/EP2462403A1/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
    • 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
    • F42C15/24—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by inertia means
    • 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
    • F42C15/24—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by inertia means
    • F42C15/26—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by inertia means using centrifugal force

Definitions

  • the invention relates to a priming safety device for ammunition using the technology of micro-mechatronic silicon systems.
  • the environment of rotating ammunition such as projectiles mortars, shells or other types of ammunition, is characterized, in use, by the presence of axial acceleration forces and centrifugal forces.
  • a munition in a launcher tube or in a thruster is subjected to axial acceleration forces at the moment of its departure into the tube and to centrifugal forces resulting from the rotational movement produced for example during the displacement of the ammunition in the tube, by helical grooves in the inner wall of the tube.
  • the ammunition usually includes a firing rocket of an explosive charge carried by the ammunition.
  • the firing rocket includes one or more safety devices to prevent the explosive charge from being accidentally activated during handling by storage or transport by persons.
  • DSA triggering safety devices
  • MEMS use Silicon micromachining techniques to integrate sensor and actuator functions sometimes with associated electronics.
  • the most common MEMS sensors are accelerometers in airbag, geophone, and gyrometer applications.
  • MEMS can combine mechanical, optical, electromagnetic technology elements with electronics or mechanics on semiconductor substrates.
  • the invention proposes a munitions priming security device as defined by the claims.
  • a main objective of the invention lies in the realization of a boot safety device at low cost and high reliability.
  • Another object of the invention lies in the use of at least one technology different from that of silicon for at least one of the security devices of the priming device. It is therefore to seek to add to a MEMS technology using a semiconductor substrate (for example silicon) for one of the securities, a different technology for another security.
  • a semiconductor substrate for example silicon
  • the figure 1a represents a side view of a boot safety device according to the invention.
  • the figure 1b is an exploded view showing the different elements of the security slide of the figure 1a .
  • the safety device of the figure 1a comprises a central element 10 sandwiched along a plane S between an upper closure element 12 and a lower closure element 14.
  • the elements 10, 12, 14 have rectangular parallelepiped shapes.
  • the central element 10 in the form of a frame along a main axis XX ', comprises a rectangular opening 20 having four walls, two first walls parallel to the main axis XX' and two second walls perpendicular to said main axis XX '.
  • the walls of the opening 20 form with a lower surface 24 of the upper closure element 12 and an upper surface 26 of the lower closure element 14, a recess 28 containing a slider 30 of rectangular parallelepiped shape (see FIG. figure 1a ) in two planes of symmetry of the slide passing respectively by the main axis XX 'and an axis YY' perpendicular to the main axis XX '.
  • the slider 30 is integral with a 36 of the two second walls of the opening (20) perpendicular to the main axis XX 'via a spring 46, of axis of elasticity parallel to the main axis XX '.
  • the slider 30 has a hole 44, of axis V ⁇ / 'perpendicular to the plane S of the sandwich.
  • the axis VV 'of the hole 44 is offset, from the spring side 46, by a certain distance from the axis YY' of the slide.
  • the slider 30 is held in position in the recess 28 by an inertial lock 40 inserted in the hole 44 of the slider.
  • the inertial lock is itself secured to the lower closure element 14.
  • the figure 2a represents a partial view of the device of the figure 1a in longitudinal section along a plane P parallel to the main axis XX 'of the central element 10 and passing through the axis VV' of the hole 44 of the slider 30.
  • the Figures 2b and 2c respectively show a view from above and a front view of an inertial lock of the device of the figure 1 at.
  • the inertial lock 40 of circular cylindrical shape, of axis of revolution CC, 'comprises, from one of its two ends to the other, a rod 50 of circular cylindrical section, of the same diameter D1 as the diameter of the hole 44. of the slider 30, followed by a head 52 of the same circular cylindrical shape but of diameter D2 greater than the diameter D1 to form a circular edge 54 of abutment on the circular edge 58 of the hole 44 of the slider on the side of the lower closure element 14.
  • the rod 50 can slide freely in the hole 44 of the slide according to a translation axis EE '.
  • the figure 2d shows a partial view in cross-section, along the same plane P parallel to the main axis XX ', of the lower closure element 14.
  • the lower closure element 14 (see figure 2d ) has, on the side of its upper surface 26, a high recess 60 separated from a lower recess 64 by a partition wall 62 in a plane parallel to the plane S of the sandwich.
  • the high recess 60 and the low recess 64 are of the same circular cylindrical shape with axes of revolution collinear with the translation axis EE.
  • the upper recess 60 and the lower recess 64 of the lower closure element 14 have the same diameter D2 as the head 52 of the inertial lock 40.
  • the head 52 of the inertial lock 40 can slide without resistance into one or other of the recesses, bottom 64 and top 60, of the lower closure element 14.
  • the length L of the rod 50 is slightly less than the thickness E of the movable member 30 to prevent the breaking of the wall 62 during the production of the sandwich.
  • FIGS. 3a, 3b and 3c show others partial views in longitudinal section of the device of the figure 1a .
  • Figures 3a, 3b and 3c are views in longitudinal section along the plane P parallel to the main axis XX 'passing through the axis VV' of the hole 44 of the slider 30.
  • the boot safety device is for example used in a rocket of rotating ammunition.
  • the ignition safety device is inserted between a detonator DT and a pyrotechnic receiver RP aligned along a detonation axis ZZ 'perpendicular to the plane S of the sandwich as represented in FIG. figure 1a to activate a pyrotechnic charge of the ammunition.
  • the detonator DT is disposed on the side of the upper closure element 12 and the pyrotechnic receiver RP on the side of the lower closure element 14.
  • the device according to the invention is configured so that, when the first and second safeties are activated, the rod 50 of the inertial lock is inserted into the hole 34 of the slider 30 to hold it in position in the recess 28, the head 52 said inertial lock being inserted into the top recess 60 of the lower closure element 14.
  • a first phase corresponding for example to a storage period of the device (or the ammunition comprising the safety device), represented in FIG. figure 3a , the safety device is at rest, it undergoes no acceleration.
  • the slider 30 is held in position in the recess 28 of the central element 10 by the rod 50 of the inertial lock 40 inserted into the hole 34 of the slider.
  • the head 52 of the inertial lock 40 is inserted into the top recess 60 of the lower closure element 14 preventing the lateral displacement of the inertial lock parallel to the main axis XX '.
  • the inertial lock 40 is locked in translation by its head 52 inserted into the top recess 60 of the lower closure element 14, along the axis VV ', in the two opposite directions, in one direction, through the wall 62 of the lower closure element 14 and, in the other opposite direction, by the circular edge 58 of the hole 34 of the slider 30, the circular abutment edge 54 of the inertial lock 40 abuts on said circular edge 58 of the hole 34.
  • the first security formed by the rod 50 of the inertial lock inserted in the hole 34 of the slide to keep it in position in the recess 28 and the second security formed by the slider 30 separating the detonator from the pyrotechnic receiver are activated.
  • the detonation waves OD produced by an accidental activation of the detonator DT directed towards the pyrotechnic receiver RP are blocked or very damped by the presence of the slider 30 between the detonator DT and the pyrotechnic receiver RP which can not be activated. .
  • the boot safety device equipping for example the fuze of a munition, receives a transverse acceleration Acct according to the detonation axis ZZ 'and in a direction from the lower closure element 14 towards the element of upper closure 12.
  • the inertia of the inertial lock 40 produces a force Ft exerted via its head 54 on the partition wall 62 of the lower closure element 14.
  • the force Ft breaks said partition wall 62 releasing the inertial lock 40 in translation along the detonation axis ZZ ', which moves in the lower recess 64 of the lower closure element 14
  • the rod 50 then fires from the hole 34 releasing the slide 30 from its locked position in the recess 28 of the central element 10. The first security of the device is then deactivated.
  • a third phase represented in figure 3b in addition to the transverse acceleration Acct, the safety device undergoes a lateral acceleration Accl perpendicular to the translation axis EE ', for example due to a lateral movement movement of the safety device from one initial position to another position.
  • the slider 30, by its inertia tends to remain in its initial position.
  • a relative displacement of the slider 30 in the recess 28 occurs.
  • the detection device is preferably disposed in the munition so as to undergo acceleration in a direction such that the slide tends to compress the spring 46.
  • the figure 4 shows the device of the figure 1b in the security position deactivated.
  • the figure 4 represents the central element 10 and the slide 30 compressing the spring 46 during the lateral acceleration Accl.
  • the closing elements 12, 14 are configured to transmit the detonation waves of the detonator to the pyrotechnic receiver.
  • the pyrotechnic charge of the munition can be activated by the activation of the detonator DT.
  • the manufacture of the boot safety device comprises at least steps for producing the different elements of the silicon substrate device and producing the metal inertial lock.
  • the device is made by assembling the sandwich comprising the metal inertial lock 40 inside the silicon substrate device.
  • the sandwich is compressed and heated to make the assembly.
  • Other methods of assembly can also be used such as the use of ultrasound, or by pressing.
  • a plurality of elements of the same type namely, the central element 10 comprising the spring 46 and the movable element 30, the upper closure element 12, the lower closure element 14 can be made collectively each respectively on a silicon wafer. Then, after introduction of the metal inertial locks for all devices, assembling the wafer to obtain a plurality of boot safety devices. In a final step, the assembled wafers are cut to separate the various safety devices.
  • the material of the movable member 40 is not limited to the metal and may be selected from metals, plastics, ceramics. The material will be chosen according to the application and the physical phenomenon to be detected.
  • the boot safety device according to the invention is associated with an ammunition rocket such as a shell or a rocket.
  • a shell When a shell is propelled by its explosive charge, it produces a first transverse acceleration Acct unlocking the first inertial safety and a lateral acceleration Accl produced by the rotation of the shell printed by the internal grooves of the barrel unlocking the second security by the moving the slider in the movable member.
  • the axis of rotation of the munition and the axis of the slide 30 must be shifted to cause a lateral acceleration Accl sufficient to move the slide in the recess 28.
  • the boot safety device according to the invention makes it possible to reduce the manufacturing costs of rotating ammunition while obtaining a high level of reliability.

Description

L'invention concerne un dispositif de sécurité d'amorçage pour munition utilisant la technologie des systèmes micro-mécatroniques du silicium.The invention relates to a priming safety device for ammunition using the technology of micro-mechatronic silicon systems.

L'environnement des munitions tournantes tels que les projectiles des mortiers, obus ou autres types de munitions, est caractérisé, lors de leur utilisation, par la présence de forces d'accélération axiale et de forces centrifuges. Par exemple, une munition dans un tube lanceur ou dans un propulseur est soumise à des forces d'accélération axiale au moment de son départ dans le tube et à des forces centrifuges issues du mouvement de rotation produits par exemple, lors du déplacement de la munition dans le tube, par des rainures hélicoïdales dans la paroi internes du tube.The environment of rotating ammunition such as projectiles mortars, shells or other types of ammunition, is characterized, in use, by the presence of axial acceleration forces and centrifugal forces. For example, a munition in a launcher tube or in a thruster is subjected to axial acceleration forces at the moment of its departure into the tube and to centrifugal forces resulting from the rotational movement produced for example during the displacement of the ammunition in the tube, by helical grooves in the inner wall of the tube.

Les munitions comportent habituellement une fusée d'amorçage d'une charge explosive portée par la munition. La fusée d'amorçage comporte un ou plusieurs dispositifs de sécurité pour éviter que la charge explosive ne soit activée par accident lors des manipulations de stockage ou de transport par des personnes.The ammunition usually includes a firing rocket of an explosive charge carried by the ammunition. The firing rocket includes one or more safety devices to prevent the explosive charge from being accidentally activated during handling by storage or transport by persons.

La miniaturisation, la fiabilité, la reproductibilité des systèmes de sécurité conduisent les concepteurs des fusées de munitions à utiliser des dispositif de sécurité d'amorçage (DSA) en technologie des systèmes micro-électro-mécaniques ou d'acronyme MEMS pour MicroElectroMechanical System en langue anglaise.The miniaturization, reliability, reproducibility of security systems lead the designers of ammunition rockets to use triggering safety devices (DSA) in micro-electro-mechanical systems or MEMS acronyms for MicroElectroMechanical System in language English.

Les MEMS utilisent des techniques de micro-usinage sur Silicium pour intégrer des fonctions capteurs et actionneurs parfois avec une électronique associée. Les capteurs MEMS les plus courants sont les accéléromètres dans des applications d'airbag, géophone, gyromètre.MEMS use Silicon micromachining techniques to integrate sensor and actuator functions sometimes with associated electronics. The most common MEMS sensors are accelerometers in airbag, geophone, and gyrometer applications.

Les MEMS peuvent associer des éléments de technologie mécaniques, optiques, électromagnétiques à de l'électronique ou de la mécanique sur des substrats semi-conducteurs.MEMS can combine mechanical, optical, electromagnetic technology elements with electronics or mechanics on semiconductor substrates.

Les prescripteurs, dans le domaine des munitions utilisant des MEMS, demandent une plus grande fiabilité des sécurités d'amorçage pouvant présenter parfois des causes de défaillance communes.Prescribers, in the field of ammunition using MEMS, require greater reliability of booting safeguards that can sometimes have common causes of failure.

Le document US 6 064 013 A divulgue un dispositif de sécurité d'amorçage de munitions.The document US 6,064,013 A discloses an ammunition boot safety device.

Pour pallier les inconvénients des dispositifs de sécurité de l'état de l'art l'invention propose un dispositif de sécurité d'amorçage de munition tel que défini par les revendications.To overcome the drawbacks of state of the art security devices, the invention proposes a munitions priming security device as defined by the claims.

Un principal objectif de l'invention réside dans la réalisation d'un dispositif de sécurité d'amorçage à faible coût et grande fiabilité.A main objective of the invention lies in the realization of a boot safety device at low cost and high reliability.

Un autre objectif de l'invention réside dans l'utilisation d'au moins une technologie différente de celle du silicium pour au moins une des sécurités du dispositif d'amorçage. Il est donc rechercher d'adjoindre à une technologie MEMS utilisant un substrat semi-conducteur (par exemple en silicium) pour une des sécurités, une technologie différente pour une autre sécurité.Another object of the invention lies in the use of at least one technology different from that of silicon for at least one of the security devices of the priming device. It is therefore to seek to add to a MEMS technology using a semiconductor substrate (for example silicon) for one of the securities, a different technology for another security.

L'invention sera mieux comprise à l'aide d'un exemple de réalisation d'un dispositif de sécurité d'amorçage en référence aux dessins indexés dans lesquels :

  • la figure 1a représente une vue latérale d'un dispositif de sécurité d'amorçage selon l'invention ;
  • la figure 1b représente une vue éclatée montrant les différents éléments du diapositif de sécurité de la figure 1a ;
  • la figure 2a représente un vue partielle du dispositif de la figure 1a en coupe longitudinale ;
  • les figures 2b et 2c montrent respectivement une vue de dessus et une vue de face d'un verrou inertiel du dispositif de la figure 1 a ;
  • les figures 3a, 3b et 3c montrent d'autres des vue partielles en coupe longitudinal du dispositif de la figure 1a et ;
  • la figure 4 montre le dispositif de la figure 1b en positon sécurités désactivées.
The invention will be better understood with the aid of an exemplary embodiment of a boot safety device with reference to the indexed drawings in which:
  • the figure 1a represents a side view of a boot safety device according to the invention;
  • the figure 1b is an exploded view showing the different elements of the security slide of the figure 1a ;
  • the figure 2a represents a partial view of the device of the figure 1a in longitudinal section;
  • the Figures 2b and 2c respectively show a view from above and a front view of an inertial lock of the device of the figure 1 at ;
  • the Figures 3a, 3b and 3c show others partial views in longitudinal section of the device of the figure 1a and;
  • the figure 4 shows the device of the figure 1b in security position deactivated.

La figure 1a représente une vue latérale d'un dispositif de sécurité d'amorçage selon l'invention.The figure 1a represents a side view of a boot safety device according to the invention.

La figure 1b représente une vue éclatée montrant les différents éléments du diapositif de sécurité de la figure 1a.The figure 1b is an exploded view showing the different elements of the security slide of the figure 1a .

Le dispositif de sécurité de la figure 1a comporte un élément central 10 pris en sandwich selon un plan S entre un élément de fermeture supérieur 12 et un élément de fermeture inférieur 14.The safety device of the figure 1a comprises a central element 10 sandwiched along a plane S between an upper closure element 12 and a lower closure element 14.

Dans cet exemple de réalisation les éléments 10, 12,14 ont des formes parallélépipédiques rectangulaires.In this embodiment, the elements 10, 12, 14 have rectangular parallelepiped shapes.

L'élément central 10, sous forme de cadre selon un axe principal XX', comporte une ouverture rectangulaire 20 ayant quatre parois, deux premières parois parallèles à l'axe principal XX' et deux secondes parois perpendiculaires audit axe principal XX'.The central element 10, in the form of a frame along a main axis XX ', comprises a rectangular opening 20 having four walls, two first walls parallel to the main axis XX' and two second walls perpendicular to said main axis XX '.

Les parois de l'ouverture 20 forment avec une surface inférieure 24 de l'élément de fermeture supérieur 12 et une surface supérieure 26 de l'élément de fermeture inférieur 14, un évidement 28 contenant un coulisseau 30 de forme de parallélépipédique rectangulaire (voir figure 1a) selon deux plans de symétrie du coulisseau passant respectivement par l'axe principal XX' et un axe YY' perpendiculaire à l'axe principal XX'.The walls of the opening 20 form with a lower surface 24 of the upper closure element 12 and an upper surface 26 of the lower closure element 14, a recess 28 containing a slider 30 of rectangular parallelepiped shape (see FIG. figure 1a ) in two planes of symmetry of the slide passing respectively by the main axis XX 'and an axis YY' perpendicular to the main axis XX '.

Le coulisseau 30 est solidaire d'une 36 des deux secondes parois de l'ouverture (20) perpendiculaires à l'axe principal XX' par l'intermédiaire d'un ressort 46, d'axe d'élasticité parallèle à l'axe principal XX'.The slider 30 is integral with a 36 of the two second walls of the opening (20) perpendicular to the main axis XX 'via a spring 46, of axis of elasticity parallel to the main axis XX '.

Le coulisseau 30 comporte un trou 44, d'axe V\/' perpendiculaire au plan S du sandwich. L'axe VV' du trou 44 est décalé, du côte ressort 46, d'une certaine distance de l'axe YY' du coulisseau.The slider 30 has a hole 44, of axis V \ / 'perpendicular to the plane S of the sandwich. The axis VV 'of the hole 44 is offset, from the spring side 46, by a certain distance from the axis YY' of the slide.

Le coulisseau 30 est maintenu en position dans l'évidement 28 par un verrou inertiel 40 inséré dans le trou 44 du coulisseau. Le verrou inertiel est lui-même solidaire de l'élément de fermeture inférieur 14.The slider 30 is held in position in the recess 28 by an inertial lock 40 inserted in the hole 44 of the slider. The inertial lock is itself secured to the lower closure element 14.

La figure 2a représente un vue partielle du dispositif de la figure 1a en coupe longitudinale selon un plan P parallèle à l'axe principal XX' de l'élément central 10 et passant par l'axe VV' du trou 44 du coulisseau 30.The figure 2a represents a partial view of the device of the figure 1a in longitudinal section along a plane P parallel to the main axis XX 'of the central element 10 and passing through the axis VV' of the hole 44 of the slider 30.

Les figures 2b et 2c montrent respectivement une vue de dessus et une vue de face d'un verrou inertiel du dispositif de la figure 1 a.The Figures 2b and 2c respectively show a view from above and a front view of an inertial lock of the device of the figure 1 at.

Le verrou inertiel 40, de forme cylindrique circulaire, d'axe de révolution CC,' comporte, d'une de ses deux extrémités à l'autre, une tige 50 de section cylindrique circulaire, de même diamètre D1 que le diamètre du trou 44 du coulisseau 30, suivie d'une tête 52 de même forme cylindrique circulaire mais de diamètre D2 supérieur au diamètre D1 pour former un bord circulaire 54 de butée sur le bord 58 circulaire du trou 44 du coulisseau du côté de l'élément de fermeture inférieur 14.The inertial lock 40, of circular cylindrical shape, of axis of revolution CC, 'comprises, from one of its two ends to the other, a rod 50 of circular cylindrical section, of the same diameter D1 as the diameter of the hole 44. of the slider 30, followed by a head 52 of the same circular cylindrical shape but of diameter D2 greater than the diameter D1 to form a circular edge 54 of abutment on the circular edge 58 of the hole 44 of the slider on the side of the lower closure element 14.

La tige 50 peut coulisser librement dans le trou 44 du coulisseau selon un axe de translation EE'.The rod 50 can slide freely in the hole 44 of the slide according to a translation axis EE '.

La figure 2d montre une vue partielle en coupe transversale, selon le même plan P parallèle à l'axe principal XX', de l'élément de fermeture inférieur 14.The figure 2d shows a partial view in cross-section, along the same plane P parallel to the main axis XX ', of the lower closure element 14.

L'élément de fermeture inférieur 14 (voir figure 2d) comporte, du côté de sa surface supérieure 26, un évidement haut 60 séparé d'un évidement bas 64 par une paroi de séparation 62 dans un plan parallèle au plan S du sandwich. L'évidement haut 60 et l'évidement bas 64 sont de même forme cylindrique circulaire d'axes de révolution colinéaires à l'axe de translation EE.The lower closure element 14 (see figure 2d ) has, on the side of its upper surface 26, a high recess 60 separated from a lower recess 64 by a partition wall 62 in a plane parallel to the plane S of the sandwich. The high recess 60 and the low recess 64 are of the same circular cylindrical shape with axes of revolution collinear with the translation axis EE.

L'évidement haut 60 et l'évidement bas 64 de l'élément de fermeture inférieur 14 ont le même diamètre D2 que la tête 52 du verrou inertiel 40.The upper recess 60 and the lower recess 64 of the lower closure element 14 have the same diameter D2 as the head 52 of the inertial lock 40.

La tête 52 du verrou inertiel 40 peut glisser sans résistance dans l'un ou l'autre des évidements, bas 64 et haut 60, de l'élément de fermeture inférieur 14.The head 52 of the inertial lock 40 can slide without resistance into one or other of the recesses, bottom 64 and top 60, of the lower closure element 14.

La longueur L de la tige 50 est légèrement inférieure à l'épaisseur E de l'élément mobile 30 pour éviter la cassure de la paroi 62 lors de la réalisation du sandwich.The length L of the rod 50 is slightly less than the thickness E of the movable member 30 to prevent the breaking of the wall 62 during the production of the sandwich.

Les figures 3a, 3b et 3c montrent d'autres des vues partielles en coupe longitudinale du dispositif de la figure 1a.The Figures 3a, 3b and 3c show others partial views in longitudinal section of the device of the figure 1a .

Les vues des figures 3a, 3b et 3c sont des vues en coupe longitudinale selon le plan P parallèle à l'axe principal XX' passant par l'axe VV' du trou 44 du coulisseau 30.The views of Figures 3a, 3b and 3c are views in longitudinal section along the plane P parallel to the main axis XX 'passing through the axis VV' of the hole 44 of the slider 30.

Nous allons par la suite expliquer le fonctionnement du dispositif de sécurité d'amorçage selon l'invention en se référant aux figures 3a, 3b et 3c. Le dispositif de sécurité d'amorçage est par exemple utilisé dans une fusée de munition tournante. Dans ce type d'application, le dispositif de sécurité d'amorçage est inséré entre un détonateur DT et un récepteur pyrotechnique RP alignés selon un axe de détonation ZZ' perpendiculaire au plan S du sandwich tel que représentés à la figure 1a pour activer une charge pyrotechnique de la munition.We will then explain the operation of the boot safety device according to the invention with reference to the Figures 3a, 3b and 3c . The boot safety device is for example used in a rocket of rotating ammunition. In this type of application, the ignition safety device is inserted between a detonator DT and a pyrotechnic receiver RP aligned along a detonation axis ZZ 'perpendicular to the plane S of the sandwich as represented in FIG. figure 1a to activate a pyrotechnic charge of the ammunition.

Le détonateur DT est disposé du côté de l'élément supérieur de fermeture 12 et le récepteur pyrotechnique RP du côté de l'élément inférieur de fermeture 14.The detonator DT is disposed on the side of the upper closure element 12 and the pyrotechnic receiver RP on the side of the lower closure element 14.

Le dispositif selon l'invention est configuré pour que, lorsque la première et la deuxième sécurités sont activées, la tige 50 du verrou inertiel soit insérée dans le trou 34 du coulisseau 30 pour le maintenir en position dans l'évidement 28, la tête 52 dudit verrou inertiel étant insérée dans l'évidement haut 60 de l'élément inférieur de fermeture 14.The device according to the invention is configured so that, when the first and second safeties are activated, the rod 50 of the inertial lock is inserted into the hole 34 of the slider 30 to hold it in position in the recess 28, the head 52 said inertial lock being inserted into the top recess 60 of the lower closure element 14.

Dans une première phase, correspondant par exemple à une période de stockage du dispositif (ou de la munition comportant le dispositif de sécurité), représentée à la figure 3a, le dispositif de sécurité est au repos, il ne subit aucune accélération.In a first phase, corresponding for example to a storage period of the device (or the ammunition comprising the safety device), represented in FIG. figure 3a , the safety device is at rest, it undergoes no acceleration.

Dans cette première phase, l'axe de détonation ZZ' traverse une partie centrale du coulisseau 30 qui sépare le détonateur DT du récepteur pyrotechnique RP. Le coulisseau 30 est maintenu en position dans l'évidement 28 de l'élément central 10 par la tige 50 du verrou inertiel 40 insérée dans le trou 34 du coulisseau.In this first phase, the detonation axis ZZ 'passes through a central portion of the slider 30 which separates the detonator DT from the pyrotechnic receiver RP. The slider 30 is held in position in the recess 28 of the central element 10 by the rod 50 of the inertial lock 40 inserted into the hole 34 of the slider.

La tête 52 du verrou inertiel 40 est insérée dans l'évidement haut 60 de l'élément de fermeture inférieur 14 empêchant le déplacement latéral du verrou inertiel parallèlement à l'axe principal XX'.The head 52 of the inertial lock 40 is inserted into the top recess 60 of the lower closure element 14 preventing the lateral displacement of the inertial lock parallel to the main axis XX '.

Le verrou inertiel 40 est bloqué en translation par sa tête 52 insérée dans l'évidement haut 60 de l'élément inférieur de fermeture 14, selon l'axe VV', dans les deux directions opposées, dans une direction, par la paroi 62 de l'élément inférieur de fermeture 14 et, dans l'autre direction opposée, par le bord circulaire 58 du trou 34 du coulisseau 30, le bord circulaire de butée 54 du verrou inertiel 40 butant sur ledit bord circulaire 58 du trou 34.The inertial lock 40 is locked in translation by its head 52 inserted into the top recess 60 of the lower closure element 14, along the axis VV ', in the two opposite directions, in one direction, through the wall 62 of the lower closure element 14 and, in the other opposite direction, by the circular edge 58 of the hole 34 of the slider 30, the circular abutment edge 54 of the inertial lock 40 abuts on said circular edge 58 of the hole 34.

Dans cette première phase, la première sécurité formée par la tige 50 du verrou inertiel inséré dans le trou 34 du coulisseau pour le maintenir en position dans l'évidement 28 et la deuxième sécurité formée par le coulisseau 30 séparant le détonateur du récepteur pyrotechnique sont activées.In this first phase, the first security formed by the rod 50 of the inertial lock inserted in the hole 34 of the slide to keep it in position in the recess 28 and the second security formed by the slider 30 separating the detonator from the pyrotechnic receiver are activated.

Dans ce premier état, les ondes de détonation OD produites par une activation accidentelle du détonateur DT dirigées vers le récepteur pyrotechnique RP sont bloquées ou très amortie par la présence du coulisseau 30 entre le détonateur DT et le récepteur pyrotechnique RP qui ne pourras pas être activé.In this first state, the detonation waves OD produced by an accidental activation of the detonator DT directed towards the pyrotechnic receiver RP are blocked or very damped by the presence of the slider 30 between the detonator DT and the pyrotechnic receiver RP which can not be activated. .

Dans une deuxième phase représentée à la figure 3b, le dispositif de sécurité d'amorçage, équipant par exemple la fusée d'une munition, reçoit une accélération transversale Acct selon l'axe de détonation ZZ' et dans une direction allant de l'élément de fermeture inférieur 14 vers l'élément de fermeture supérieur 12. L'inertie du verrou inertiel 40 produit une force Ft exercée par l'intermédiaire de sa tête 54 sur la paroi de séparation 62 de l'élément de fermeture inférieur 14.In a second phase represented at figure 3b , the boot safety device, equipping for example the fuze of a munition, receives a transverse acceleration Acct according to the detonation axis ZZ 'and in a direction from the lower closure element 14 towards the element of upper closure 12. The inertia of the inertial lock 40 produces a force Ft exerted via its head 54 on the partition wall 62 of the lower closure element 14.

Lorsque l'accélération Acct est suffisante, la force Ft brise ladite paroi de séparation 62 libérant le verrou inertiel 40 en translation selon l'axe de détonation ZZ', qui se déplace dans l'évidement bas 64 de l'élément de fermeture inférieur 14. La tige 50 sorts alors du trou 34 libérant le coulisseau 30 de sa positon verrouillée dans l'évidement 28 de l'élément central 10. La première sécurité du dispositif est alors désactivée.When the Acct acceleration is sufficient, the force Ft breaks said partition wall 62 releasing the inertial lock 40 in translation along the detonation axis ZZ ', which moves in the lower recess 64 of the lower closure element 14 The rod 50 then fires from the hole 34 releasing the slide 30 from its locked position in the recess 28 of the central element 10. The first security of the device is then deactivated.

Dans une troisième phase représentée à la figure 3b, en plus de l'accélération transversale Acct, le dispositif de sécurité subit une accélération latérale Accl perpendiculaire à l'axe de translation EE', par exemple due à un mouvement de déplacement latéral du dispositif de sécurité d'une position initiale vers une autre position. Le coulisseau 30, par son inertie tend à se maintenir dans sa position initiale. Il se produit, dans cette deuxième phase, un déplacement relatif du coulisseau 30 dans l'évidement 28.In a third phase represented in figure 3b , in addition to the transverse acceleration Acct, the safety device undergoes a lateral acceleration Accl perpendicular to the translation axis EE ', for example due to a lateral movement movement of the safety device from one initial position to another position. The slider 30, by its inertia tends to remain in its initial position. In this second phase, a relative displacement of the slider 30 in the recess 28 occurs.

Le dispositif de détection est de préférence disposé dans la munition de façon à subir une accélération dans un sens tel que le coulisseau tende à comprimer le ressort 46.The detection device is preferably disposed in the munition so as to undergo acceleration in a direction such that the slide tends to compress the spring 46.

Le coulisseau 30, libéré dans la deuxième phase du verrou inertiel 40, se déplace, dans la troisième phase, dans le sens de compression du ressort 46 libérant l'espace dans l'évidement 28 entre le détonateur DT et le récepteur pyrotechnique RP qui n'ont comme obstacle que les éléments de fermeture 12, 14 de l'élément central 10 désactivant ainsi la deuxième sécurité du dispositif.The slider 30, released in the second phase of the inertial lock 40, moves, in the third phase, in the direction of compression of the spring 46 releasing the space in the recess 28 between the detonator DT and the pyrotechnic receiver RP which have as an obstacle only the closure elements 12, 14 of the central element 10 thus deactivating the second security of the device.

La figure 4 montre le dispositif de la figure 1b en position sécurités désactivées. La figure 4 représente l'élément central 10 et le coulisseau 30 comprimant le ressort 46 lors de l'accélération latérale Accl.The figure 4 shows the device of the figure 1b in the security position deactivated. The figure 4 represents the central element 10 and the slide 30 compressing the spring 46 during the lateral acceleration Accl.

Les éléments dé fermeture 12, 14 sont configurés de façon à transmettre les ondes de détonation du détonateur vers le récepteur pyrotechnique.The closing elements 12, 14 are configured to transmit the detonation waves of the detonator to the pyrotechnic receiver.

Dans une dernière phase, les deux sécurités du dispositif de sécurité étant désactivées, la charge pyrotechnique de la munition peut être activée par l'activation du détonateur DT.In a last phase, the two safeties of the safety device being deactivated, the pyrotechnic charge of the munition can be activated by the activation of the detonator DT.

La fabrication du dispositif de sécurité d'amorçage comporte au moins des étapes de réalisation des différents éléments du dispositif en substrat de silicium et la réalisation du verrou inertiel en métal.The manufacture of the boot safety device comprises at least steps for producing the different elements of the silicon substrate device and producing the metal inertial lock.

Le dispositif est réalisé par assemblage du sandwich comportant le verrou inertiel 40 métallique à l'intérieur du dispositif en substrat de silicium.The device is made by assembling the sandwich comprising the metal inertial lock 40 inside the silicon substrate device.

Par exemple dans un procédé d'assemblage de la colle CI est appliquée sur les bords inférieurs 100 et supérieurs 102 de l'élément central 10 en forme de cadre (voir figures 1 a et 1 b) puis le sandwich est comprimé et chauffe pour réaliser l'assemblage. D'autres procédés d'assemblage peuvent être aussi utilisé tels que l'utilisation d'ultrasons, ou par pressage.For example in a method of assembling the CI glue is applied to the lower edges 100 and upper 102 of the central element 10 shaped frame (see figures 1 a and 1 b) then the sandwich is compressed and heated to make the assembly. Other methods of assembly can also be used such as the use of ultrasound, or by pressing.

Dans une réalisation dite en collectif, une pluralité d'éléments du même type, à savoir, l'élément central 10 comportant le ressort 46 et l'élément mobile 30, l'élément de fermeture supérieur 12, l'élément de fermeture inférieur 14, peuvent être réalisés en collectif chacun respectivement sur un wafer de silicium. Puis, après introductions des verrous inertiels en métal pour l'ensemble des dispositifs, assemblage des wafer pour obtenir une pluralité de dispositifs de sécurité d'amorçage. Dans une dernière étape les wafer assemblés sont découpés pour séparer les différents dispositifs de sécurité.In a collective embodiment, a plurality of elements of the same type, namely, the central element 10 comprising the spring 46 and the movable element 30, the upper closure element 12, the lower closure element 14 can be made collectively each respectively on a silicon wafer. Then, after introduction of the metal inertial locks for all devices, assembling the wafer to obtain a plurality of boot safety devices. In a final step, the assembled wafers are cut to separate the various safety devices.

Le matériau de l'élément mobile 40 n'est pas limitatif au métal et peut être est choisi parmi les métaux, les matières plastiques, les céramiques. Le matériau sera choisi en fonction de l'application et du phénomène physique à détecter.The material of the movable member 40 is not limited to the metal and may be selected from metals, plastics, ceramics. The material will be chosen according to the application and the physical phenomenon to be detected.

En pratique, le dispositif de sécurité d'amorçage selon l'invention est associé à une fusée de munition telle qu'un obus ou une roquette.In practice, the boot safety device according to the invention is associated with an ammunition rocket such as a shell or a rocket.

Lorsqu'un obus est propulsé par sa charge explosive, il se produit une première accélération transversale Acct déverrouillant la première sécurité inertielle puis une accélération latérale Accl produite par la rotation de l'obus imprimée par les rainures internes du canon déverrouillant la deuxième sécurité par le déplacement du coulisseau dans l'élément mobile. A cet effet, l'axe de rotation de la munition et l'axe du coulisseau 30 doivent être décalés pour provoquer une accélération latérale Accl suffisante pour déplacer le coulisseau dans l'évidement 28.When a shell is propelled by its explosive charge, it produces a first transverse acceleration Acct unlocking the first inertial safety and a lateral acceleration Accl produced by the rotation of the shell printed by the internal grooves of the barrel unlocking the second security by the moving the slider in the movable member. For this purpose, the axis of rotation of the munition and the axis of the slide 30 must be shifted to cause a lateral acceleration Accl sufficient to move the slide in the recess 28.

Le dispositif de sécurité d'amorçage selon l'invention permet de diminuer les coûts de fabrication des munitions tournantes tout en obtenant un niveau de fiabilité élevée.The boot safety device according to the invention makes it possible to reduce the manufacturing costs of rotating ammunition while obtaining a high level of reliability.

Claims (7)

  1. A priming safety device for ammunition using silicon micro-mechatronic systems technology with at least two priming safeties designed to be deactivated by as many independent external physical events, comprising at least one movable element (40), along an axis of translation EE', for deactivating at least one of said priming safeties by the action on said movable element of one of the physical events, with said movable element being an inertial lock (40) forming a first safety, with the physical event acting on said movable element being an axial acceleration force (Ft), along said axis of translation EE' of said movable element for deactivating said first safety, wherein said axial acceleration force (Ft) can be caused by a translational movement of the ammunition along the same axis EE',
    said device comprising a central element (10) sandwiched, along a plane S perpendicular to the axis of translation EE', between an upper closure element (12) and a lower closure element (14), said central element (10) comprising an opening (20) forming, with said upper closure element (12) and said lower closure element (14), a recess (28) containing a slide (30) designed to slide in said recess (28) in the plane S of the sandwich, said slide (30) forming a second device safety, said second safety being deactivated by the presence of a lateral acceleration force (Accl), perpendicular to the axis of translation EE" of said movable element (40), that can be caused by a rotational movement of the ammunition, said slide (30) comprising a hole (44), with an axis VV' perpendicular to the plane S of the sandwich, said slide (30) being held in position in said recess (28) by said inertial lock (40) inserted into said hole (44) of said slide, said inertial lock itself being rigidly connected to the lower closure element (14), said device being characterised in that said lower closure element (14) comprises, on its upper surface (26), an upper recess (60) separated from a lower recess (64) by a separation wall (62) in a plane parallel to the plane S of the sandwich, with said upper recess (60) and said lower recess (64) having the same circular cylindrical shape with axes of revolution collinear to the axis of translation EE', said upper recess (60) and said lower recess (64) of said lower closure element (14) having the same diameter D2 as the head (52) of said inertial lock (40), said head (52) of said inertial lock (40) being designed to freely slide in either one of said lower (64) and upper (60) recesses of said lower closure element (14).
  2. The priming safety device according to claim 1, characterised in that said movable element (40) is made from a material other than silicon, with the material of said movable element (40) being selected from among metals, plastic materials and ceramics.
  3. The priming safety device according to claim 1 or 2, characterised in that said central element (10) is in the form of a frame along a main axis XX' having a rectangular shaped opening (20) comprising four walls, two first walls parallel to said main axis XX' and two second walls perpendicular to said main axis XX', with said walls forming, with a lower surface (24) of said upper closure element (12) and an upper surface (26) of said lower closure element (14), said recess (28) containing said rectangular parallelepiped shape slide (30), said slide (30) being able to slide in said recess (28) between said two first walls (32, 34) of said opening (20) parallel to said main axis XX'.
  4. The priming safety device according to claim 3, characterised in that said slide (30) is rigidly connected to one (36) of said two second walls of said opening (20) perpendicular to said main axis XX' by means of a spring (46), with an axis of elasticity parallel to said main axis XX'.
  5. The priming safety device according to any one of claims 1 to 4, characterised in that said circular cylindrical shaped inertial lock (40), with an axis of revolution CC', comprises, from one of its two ends to the other, a rod (50) of circular cylindrical cross-section that has the same diameter D1 as the diameter of said hole (44) of said slide (30), followed by a head (52) with the same circular cylindrical shape but with a diameter D2 that is greater than the diameter D1 so as to form a circular abutment edge (54) on the circular edge (58) of said hole (44) of said slide on the side of said lower closure element (14).
  6. The priming safety device according to claim 1, characterised in that it is configured so that, when said first and said second safeties are activated, said rod (50) of said inertial lock (40) is inserted into said hole (44) of said slide so as to hold it in position in said recess (28), with said head (52) of said inertial lock being inserted into said upper recess (60) of said lower closure element (14).
  7. The priming safety device according to any one of claims 2 to 6, characterised in that said central element (10), said slide (30), said spring (46) and said closure elements (12, 14) are made from silicon and said movable element (40) is made from steel.
EP10725123.3A 2009-08-04 2010-06-10 Safety priming device for ammunition Active EP2462403B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0903848A FR2948993A1 (en) 2009-08-04 2009-08-04 PRIMING SECURITY DEVICE FOR ROTATING AMMUNITION
PCT/EP2010/058180 WO2011015399A1 (en) 2009-08-04 2010-06-10 Safety priming device for rotating ammunition

Publications (2)

Publication Number Publication Date
EP2462403A1 EP2462403A1 (en) 2012-06-13
EP2462403B1 true EP2462403B1 (en) 2014-03-12

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EP10725123.3A Active EP2462403B1 (en) 2009-08-04 2010-06-10 Safety priming device for ammunition

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US (1) US8820240B2 (en)
EP (1) EP2462403B1 (en)
ES (1) ES2466740T3 (en)
FR (1) FR2948993A1 (en)
IL (1) IL217906A (en)
WO (1) WO2011015399A1 (en)
ZA (1) ZA201201354B (en)

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Publication number Priority date Publication date Assignee Title
IL249976B (en) * 2017-01-08 2022-02-01 Israel Aerospace Ind Ltd Safety device
CN109029137B (en) * 2018-09-11 2020-03-31 西安交通大学 Two-way drive MEMS security device

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Publication number Priority date Publication date Assignee Title
US5705767A (en) * 1997-01-30 1998-01-06 The United States Of America As Represented By The Secretary Of The Army Miniature, planar, inertially-damped, inertially-actuated delay slider actuator
US6167809B1 (en) * 1998-11-05 2001-01-02 The United States Of America As Represented By The Secretary Of The Army Ultra-miniature, monolithic, mechanical safety-and-arming (S&A) device for projected munitions
US6622629B2 (en) * 2001-10-17 2003-09-23 Northrop Grumman Corporation Submunition fuzing and self-destruct using MEMS arm fire and safe and arm devices
FR2932561B1 (en) * 2008-06-11 2010-08-20 Nexter Munitions MICRO INITIATOR SECURE

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FR2948993A1 (en) 2011-02-11
WO2011015399A1 (en) 2011-02-10
ZA201201354B (en) 2012-11-28
EP2462403A1 (en) 2012-06-13
ES2466740T3 (en) 2014-06-11
US20120266771A1 (en) 2012-10-25
IL217906A0 (en) 2012-03-29
US8820240B2 (en) 2014-09-02
IL217906A (en) 2015-06-30

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