EP2402706B1 - Sicherheits- und Zündvorrichtung mit Trägheitsschloss in MEMS-Technologien - Google Patents

Sicherheits- und Zündvorrichtung mit Trägheitsschloss in MEMS-Technologien Download PDF

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Publication number
EP2402706B1
EP2402706B1 EP11290293.7A EP11290293A EP2402706B1 EP 2402706 B1 EP2402706 B1 EP 2402706B1 EP 11290293 A EP11290293 A EP 11290293A EP 2402706 B1 EP2402706 B1 EP 2402706B1
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EP
European Patent Office
Prior art keywords
safety
lock
arming device
integral
arming
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.)
Active
Application number
EP11290293.7A
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English (en)
French (fr)
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EP2402706A1 (de
Inventor
Christian Pisella
Christophe Kergueris
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.)
Nexter Munitions SA
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Nexter Munitions SA
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Publication date
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Priority to PL11290293T priority Critical patent/PL2402706T3/pl
Publication of EP2402706A1 publication Critical patent/EP2402706A1/de
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Publication of EP2402706B1 publication Critical patent/EP2402706B1/de
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Classifications

    • 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 technical field of the invention is that of microelectromechanical projectile safety and arming devices.
  • the purpose of the safety and arming devices is to isolate the detonator from the explosive charge of a projectile and to allow communication between these two components of the pyrotechnic chain only when (according to current standards such as STANAG No. 4157) at least two distinct shooting environment conditions are met.
  • the insulation between detonator and loading is most often achieved by means of a plate also called screen or drawer obstructing a light communicating these two components.
  • the shooting environment conditions used to authorize the removal of the drawer are often as illustrated EP-2077431 on the one hand, the acceleration along the firing axis and, on the other hand, the acceleration of the projectile's rotation on its axis due to its gyrostabilization (shooting in a rifled barrel).
  • the patent EP-2077431 uses these two stresses to, initially, release an inertial lock with flyweight thanks to the acceleration along the axis of fire then, in a second time, to slide transversely the drawer in a position releasing the light thanks to the acceleration in rotation.
  • the device has two disadvantages.
  • the drawer is hooked only to the inertial lock.
  • the transverse forces received by the drawer as a result of the shocks received by the device are therefore communicated by the drawer latch that may be deflected and blocked and not be able to be released during the shooting.
  • the bolt weight is subjected after unlocking to the transverse forces due to the rotation of the projectile. These transverse forces cause the weight to the drawer and can lead to its unlocking and even its positioning in front of the light, thus disrupting the boot.
  • a security and arming device comprising a mobile screen immobilized by an inertial lock.
  • the arming of the screen is provided by a gas generator.
  • a gas generator Such a device is not implemented in a projectile subjected to an acceleration of rotation and the problem that seeks to solve the invention does not arise for this device.
  • the implementation of a gas generator to move the screen is a complex and expensive solution that is made necessary by the lack of sufficient centrifugal inertia.
  • the invention proposes to solve the problems encountered in a device as described by EP-2077431 , on the one hand by joining the lock with the body of the device and on the other hand by guiding the weight of the latch on its path.
  • the subject of the invention is thus a device for securing and cocking microelectromechanical technology for a projectile, a device incorporating a slideway that can be movable under the effect of the centrifugal acceleration relative to the body of the device and immobilized in a position by at least one inertial lock, lock comprising at least one means ensuring its locking in the unlocked position, characterized in that the inertial lock comprises a flyweight having at least one straight groove whose longitudinal axis is parallel to the direction of movement of the lock, groove in which is positioned a pin fixed guide secured to the safety and arming device, the groove having a length sufficient to allow movement of the weight relative to the pin, the slide being in its secured position secured to the body of the safety device and arming by means of a fastening means integral with the weight.
  • the hooking means comprises at least one first lug corresponding with at least one first integral hook shape of the drawer and at least one second lug corresponding with at least one second hook form integral with the safety device body and arming, the first and second lugs being oriented in the same direction, ends of the lugs oriented opposite the direction of movement of the release of the flyweight.
  • the guide pin may comprise a rectangular section occupying substantially the entire width of the groove.
  • the weight is suspended between at least two springs whose main axis of deformation is parallel to the direction of movement of the lock.
  • a safety and arming device 1 is mounted on an explosive projectile and separates a detonator placed for example below the device (mark D) and an explosive charge placed above the device (mark E). Projectile, detonator and explosive charge are not shown.
  • the safety and arming device 1 is made, just like that described by the patent EP-2077431 , according to MEMS technology (micro-machined or microgravity device on a substrate).
  • the body 2 comprises two holes 3 arranged on either side of the spool 4.
  • the axis 21 of these holes 3, and thus the direction of action of the pyrotechnic chain (DE), is thus substantially parallel to the plane of the spool 4 .
  • the detonator D must have the minimum size to ensure operation and it will be coupled to an explosive charge or a pyrotechnic relay E appropriate. It has been verified that by using a detonator comprising a 10 milligram output stage of Hexogen coupled to a very insensitive relay, for example in HNS (hexanotrostilbene), it was possible to make holes 3 (or transmission channels) of less than 1 mm 2 section (channel diameter of the order of mm) while ensuring the desired initiation transmission.
  • HNS hexanotrostilbene
  • the body 2 has a substantially parallelepiped shape.
  • the body 2 is pierced on either side of the drawer 4 by the aligned holes 3 and which materialize a light through the body 2 which constitutes the direction of action 21 of the pyrotechnic chain.
  • the interior of the body 2 comprises the drawer 4 which is disposed substantially in the center of the device 1 and an inertial lock 20 disposed on one side of the body.
  • the drawer 4 has a hook 5 on its rear side facing the latch 20 and two notches 6 on two other sides opposite the flanges of the body 2 carrying the holes 3.
  • the inside of the body 2 also comprises two micro-machined elastic strips 7 with the body 2, lamellae which are inclined in the direction of movement of the slide and facing each other. These strips 7 have substantially the orientation of the notches 6 of the drawer 4. They will be deformed by the passage of the drawer 4 and will then be housed in the notches 6.
  • the hook 5 is engaged in a first lug 8 integral with a flyweight 9 of the inertial lock 20.
  • the flyweight 9 carries a second lug 10, symmetrically disposed at the first lug 8 relative to a direction 22 of displacement of the flyweight 9.
  • This second lug 10 is engaged in a second corresponding hook 11 secured to the body 2.
  • the set of these hooks and lugs is named attachment means 12.
  • the weight 9 is placed laterally to the drawer and to move in the same plane as that of the drawer 4 but in a direction perpendicular to the movement of the drawer 4. Thus the assembly remains compact, the thickness of the device is not increased by the race of the weight 9.
  • the flyweight 9 is retained at each of its ends and along the same longitudinal axis 22 by two springs 15 and 16.
  • the weight 9 comprises a groove 13 oriented along the longitudinal axis 22. This groove 13 transversely traverses the flyweight 9 from side to side. go. Inside the groove 13 is positioned a fixed guide pin 14 which is integral with the body 2 at a bottom wall 23 on which is positioned the body 2 and the various moving parts (slide 4, weight 9 ).
  • the lower part of the weight 9 comprises a pair of tongues 17. On either side of the lower spring 16 are two walls of the body which have notches 18 for receiving the tongues 17. The assembly formed by the tongues 17 and the notches 18 is a locking means of the inertial lock 20 in its unlocked position.
  • the drawer 4 is secured to the body 2 of the device by the attachment means 12.
  • the inertial lock 20 and in particular the weight 9 is not removed by the spool 4 of its position aligned along the axis 22 as a result of the shocks that can receive the device 1 during the logistic and postage phases of the projectile in a weapon.
  • the figure 2 shows the device when firing the projectile.
  • the acceleration due to the firing generates an effort P
  • This displacement of the flyweight causes the lugs 8 and 10 of the hooking means 12 to disengage from the hooks 5 and 11.
  • the lugs 8 and 10 and the hooks 5 and 11 are placed so that the recess (or ends) of the hooks is oriented downwards and that of the lugs upwards.
  • the upper spring is then extended while the lower spring 16 is in compression.
  • Such mounting of the weight 9 between two springs 15 and 16 mounted in opposition allows to limit the buckling of the compression spring, to improve the guiding accuracy and especially to control the stiffness desired for the inertial lock.
  • the weight 9 is guided by the pin 14 which is positioned in the groove 13, aligned with the axis 22 which is also that of the springs and the inertia force P.
  • the inertial lock 20 is locked by the engagement of the tongues 17 in the notches 18.
  • the spool 4 is free in translation and under the effect of the centrifugal acceleration R due to the rotation of the projectile it will be able to slide to the end of the body 2 of the device placed opposite the inertial lock 20 .
  • the safety and arming device 1 should not be in an armed position before the projectile has left the barrel of the weapon.
  • a braking means not shown but described in the patent EP 2077431 will slow the travel of the drawer 4 so that it reaches its end position in contact with a stop 25 once the projectile out of the tube.
  • the figure 3 shows the device 1 in the armed position.
  • the drawer 4 is then abutted 25 in the body 2.
  • the slats 7 are engaged in the notches 6 and lock the drawer 4 in the armed position.
  • the holes 3 are then released and the initiation of the detonator D will be able to cause the detonation of the explosive charge E.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Emergency Lowering Means (AREA)
  • Toys (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Claims (4)

  1. Vorrichtung (1) zum Sichern und Scharfmachen mit mikroelektromechanischer Technologie für ein Projektil, wobei die Vorrichtung (1) ein Schubfach (4) einschließt, welches unter der Einwirkung der Zentrifugalbeschleunigung in Bezug auf den Körper (2) der Vorrichtung (1) beweglich sein kann und durch mindestens einen Trägheitsverschluss (20) in einer Sicherheitsposition festgelegt werden kann, wobei der Verschluss (20) mindestens ein Mittel (17 und 18) umfasst, welches dessen Blockierung in entriegelter Position gewährleistet, wobei die Vorrichtung (1) dadurch gekennzeichnet ist, dass der Trägheitsverschluss (20) ein Fliehgewicht (9) umfasst, welches mindestens eine gerade Nut (13) aufweist, deren Längsachse (22) parallel zur Bewegungsrichtung des Verschlusses verläuft, wobei sich in der Nut (13) ein fester Führungszapfen (14) positioniert, welcher mit der Vorrichtung (1) zum Sichern und Scharfmachen fest verbunden ist, wobei die Nut (13) eine Länge aufweist, welche ausreicht, um die Verlagerung des Fliehgewichts (9) in Bezug auf den Zapfen (14) zu ermöglichen, wobei das Schubfach (4) in seiner Sicherheitsposition fest mit dem Körper (2) der Vorrichtung (1) zum Sichern und Scharfmachen mit Hilfe eines fest mit dem Fliehgewicht verbundenen Festhakmittels (12) verbunden ist.
  2. Vorrichtung (1) zum Sichern und Scharfmachen nach Anspruch 1, dadurch gekennzeichnet, dass das Festhakmittel (12) mindestens einen ersten Vorsprung (8), welcher mit mindestens einer ersten Hakenform (5) in Verbindung steht, welche mit dem Schubfach (4) fest verbunden ist, und mindestens einen zweiten Vorsprung (10) umfasst, welcher mit mindestens einer zweiten Hakenform (11) in Verbindung steht, welche fest mit dem Körper (2) der Vorrichtung (1) zum Sichern und Scharfmachen verbunden ist, wobei der erste und zweite Vorsprung (8 und 10) in die gleichen Richtungen ausgerichtet sind, wobei die Enden der Vorsprünge (8 und 10) in die zur Entriegelungsbewegung des Fliehgewichts entgegengesetzte Richtung ausgerichtet sind.
  3. Vorrichtung (1) zum Sichern und Scharfmachen nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Führungszapfen (14) einen rechteckigen Abschnitt umfasst, welcher im Wesentlichen die gesamte Breite der Nut (13) einnimmt.
  4. Vorrichtung (1) zum Sichern und Scharfmachen nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Fliehgewicht (4) zwischen mindestens zwei Federn (15, 16) aufgehängt ist, deren Hauptverformungsachse (22) parallel zur Bewegungsrichtung des Verschlusses verläuft.
EP11290293.7A 2010-07-02 2011-06-30 Sicherheits- und Zündvorrichtung mit Trägheitsschloss in MEMS-Technologien Active EP2402706B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11290293T PL2402706T3 (pl) 2010-07-02 2011-06-30 Urządzenie zabezpieczające i uzbrajające z blokadą inercyjną w technologii MEMS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1002825A FR2962210A1 (fr) 2010-07-02 2010-07-02 Dispositif de securite et d'armement a verrou inertiel de technologie mems

Publications (2)

Publication Number Publication Date
EP2402706A1 EP2402706A1 (de) 2012-01-04
EP2402706B1 true EP2402706B1 (de) 2015-02-25

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US (1) US8656837B2 (de)
EP (1) EP2402706B1 (de)
ES (1) ES2533677T3 (de)
FR (1) FR2962210A1 (de)
PL (1) PL2402706T3 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3007125B1 (fr) 2013-06-18 2016-01-08 Tronic S Microsystems Sequenceur pour dispositif securise de mise a feu
CN109297374B (zh) * 2018-10-18 2020-06-02 北京理工大学 一种“三明治”式mems安全系统一体化装置及其方法
CN109186344B (zh) * 2018-10-30 2020-06-02 北京理工大学 一种单口径通用的mems安全系统及方法
CN110132074B (zh) * 2019-06-12 2020-06-26 北京理工大学 一种应用于弹药的可恢复电磁式mems安全系统及其实现方法
CN110701966A (zh) * 2019-09-30 2020-01-17 湖北三江航天红林探控有限公司 一种基于电抜销器的滑块式保险隔离装置
CN113218257B (zh) * 2020-01-21 2022-10-04 北京理工大学重庆创新中心 一种嵌入式电磁驱动平面mems安全系统及其控制方法
CN117337266A (zh) * 2021-09-29 2024-01-02 麦斯卓微电子(南京)有限公司 Mems组件和工艺流程

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3603259A (en) * 1968-06-26 1971-09-07 Avco Corp Fuze setback and angular acceleration detent
US4195575A (en) * 1977-10-03 1980-04-01 Motorola, Inc. Mechanical time delay safety and arming mechanism
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
US6321654B1 (en) * 2000-02-22 2001-11-27 The United States Of America As Represented By The Secretary Of The Army Microelectromechanical systems (MEMS) -type devices having latch release and output mechanisms
FR2892810B1 (fr) 2005-10-27 2010-05-14 Giat Ind Sa Dispositif de securite pyrotechnique a ecran micro usine
FR2926134B1 (fr) * 2008-01-07 2010-03-26 Nexter Munitions Dispositif de securite et d'armement micro-usine ou micro-grave
FR2932561B1 (fr) * 2008-06-11 2010-08-20 Nexter Munitions Micro initiateur securise

Also Published As

Publication number Publication date
FR2962210A1 (fr) 2012-01-06
ES2533677T3 (es) 2015-04-14
PL2402706T3 (pl) 2015-07-31
US20120000389A1 (en) 2012-01-05
US8656837B2 (en) 2014-02-25
EP2402706A1 (de) 2012-01-04

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