EP1548394A1 - Igniter head for a hand grenade and hand grenade provided with such an igniter head - Google Patents

Igniter head for a hand grenade and hand grenade provided with such an igniter head Download PDF

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Publication number
EP1548394A1
EP1548394A1 EP04360112A EP04360112A EP1548394A1 EP 1548394 A1 EP1548394 A1 EP 1548394A1 EP 04360112 A EP04360112 A EP 04360112A EP 04360112 A EP04360112 A EP 04360112A EP 1548394 A1 EP1548394 A1 EP 1548394A1
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EP
European Patent Office
Prior art keywords
ignition
fire
barrel
slider
hand grenade
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04360112A
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German (de)
French (fr)
Inventor
Philippe Guyon
Serge Delcleve
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.)
DIXI MICROTECHNIQUES S.A.S.
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Dixi Microtechniques SA
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Filing date
Publication date
Application filed by Dixi Microtechniques SA filed Critical Dixi Microtechniques SA
Publication of EP1548394A1 publication Critical patent/EP1548394A1/en
Withdrawn legal-status Critical Current

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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
    • F42C14/00—Mechanical fuzes characterised by the ammunition class or type
    • F42C14/02—Mechanical fuzes characterised by the ammunition class or type for hand grenades

Definitions

  • the present invention relates to an igniter plug for hand grenade comprising at least one hollow body of axis A, a trigger lever articulated by relative to the body and biased by at least one return blade between a position secure position and a percussive position, a safety pin coupled to the lever of trigger to lock it in the secure position and at least one firing pin associated with said return blade, ignition means consisting of at least so-called primary components and means for interrupting the ignition arranged for be movable between a storage position in which they form a barrier of fire intended to prevent the passage of fire from the means of ignition towards said grenade by hand, this storage position being maintained by said trigger lever as long as it is in a secure position, and an ignition position in which said fire barrier clears to allow the passage of fire from the means of ignition towards said hand grenade with a view to its explosion, this ignition position being biased by at least one return member when said release lever leaves his secure position.
  • the invention also relates to a hand grenade equipped with an igniter plug as defined
  • This type of igniter plug is commonly found on all grenades. hand well known in the field of armament. Once the safety pin removed, the user must hold the release lever firmly against the pomegranate to prevent firing, which is triggered as soon as the trigger is released, also releasing the striker. This safety pin can be removed easily or even unexpectedly, for example in the event of a fall, risking to even hurt to kill the hand grenade user and / or people relatives. Today, we are trying to strengthen the safety of lighter plugs for avoid these risks of accident.
  • solutions are to prevent the accidental removal of the pin from as in US-A-3,865,027 and US-A-3,765,337.
  • solutions consist in blocking the percussion mechanism as in the publications CH-A-466 094, US-A-1,521,996 and GB-A-1,232,283.
  • Other solutions still consist in offsetting the firing pin or the primer with respect to the chain pyrotechnic as in US-A-2,737,116, US-A-4,730,559 and FR 2,825,462.
  • this solution does not meet certain security conditions stipulated in particular in the American standard STANAG 4497 in force. Indeed, this standard requires that the firing of the hand grenade be controlled by two events and that the pyrotechnic chain is interrupted in a position of security or storage of the hand grenade provided with its lighter plug.
  • interruption of the pyrotechnic chain a physical separation between so-called primary, highly sensitive components such as primers, igniters, detonators, etc. and the so-called secondary less sensitive components such as relays, retarders, charges, etc. of this pyrotechnic chain.
  • This constraint related to the purpose of the interruption of the pyrotechnic chain is to avoid firing accidental secondary components in the case where the primary components would be initiated while the hand grenade equipped with its igniter plug is in storage or security position.
  • Some solutions consist of housing part of the components of the chain pyrotechnics in a slide movable transversely between a position of storage in which the components of the pyrotechnic chain are not aligned and an ignition position in which they are aligned, as in the publication FR-A-2 500 620.
  • Other solutions consist in providing a mechanical member interposed in the pyrotechnic chain and movable transversely between a position storage and an ignition position, as in publications FR-A-2 216 548 and FR-A-2 696 823.
  • these various solutions are complex and expensive to make.
  • the solution described in the publication FR-A-2 216 548 does not meet standards as it does not provide separation effective mechanics between the components of the pyrotechnic chain. These solutions are not satisfactory.
  • the present invention aims to solve this problem by proposing an igniter plug ensuring the interruption of the pyrotechnic chain and comprising a device for three-level safety preventing accidental firing of the hand grenade, while by allowing the reversibility of the safety device, this igniter plug being a simple, reliable and economical design.
  • the invention relates to an igniter plug of the kind indicated in preamble, characterized in that the means for interrupting the ignition comprise at least one movable slider transversely in a transverse housing of the body, this slide being provided with at least one fire screen forming the barrier of fire in storage position, a bore releasing a passage of fire in position ignition and a protruding outer end cooperating with the lever of triggering and in that the body has a distal cavity disposed in the extension of the housing opposite the trigger lever and able to receive the return member cooperating with the inner end of the slide.
  • the fire screen and the bore are distant from one another. distance substantially equal to the stroke between the two positions of the slide, this stroke that can be limited by a shoulder provided on said slide and adapted to cooperate with a wall of said body.
  • the means for interrupting the ignition may also comprise at least one sealing member disposed between the body and the slide.
  • the slide is advantageously made of a selected fire-resistant material among the group comprising at least metals and metal alloys, this material which may be, for example, Zamac®.
  • the thickness of the slider, in particular in the area of the fire screen, is also chosen to withstand fire.
  • the means for interrupting the ignition are at least disposed downstream at least so-called primary components of the ignition means.
  • the igniter plug comprises a barrel hollow axis A housed inside the body and provided in the lower part of a mouthpiece intended to be attached to the hand grenade, the body and the barrel being rotatable relative to each other between a passive position in which the barrel prevents removing the safety pin and an active position in which the barrel allows the removal of the safety pin.
  • the barrel advantageously comprises a through bore of axis A adapted to receive the ignition means and a transverse recess arranged opposite the housing traversed by said slide, this recess being arranged to allow and limit the relative rotation of the body relative to the barrel by a predefined angle ⁇ less than 90 ° and for example equal to 60 °.
  • the barrel may comprise in the upper part at least one stop stop adapted to prevent the firing pin provided on the return blade from striking the ignition means when the barrel is in the passive position and at least one notch able to authorize the percussion when the barrel is in the active position.
  • the invention relates to a hand grenade characterized in that it is equipped with an igniter plug as defined above.
  • the igniter plug 1 is intended for equipped with a hand grenade with at least one explosive charge.
  • ignition means 12 of this explosive charge 11, forming part of the chain pyrotechnic, are dissociated from the hand grenade 10 and housed in the cap igniter 1.
  • pyrotechnic chain the set of primary components and secondary from the head primer to the explosive charge.
  • the objective of the invention is to centralize at least the so-called primary components very sensitive like primers, igniters, etc. in the igniter plug 1 to have no in the hand grenade 10 itself more than so-called secondary components therefore less sensitive like the powder of the explosive charge 11 and possibly one or more retarders, relays, amplifiers, etc.
  • Some components such as relays and / or amplifiers can of course be also housed in the ignition plug 1 in addition to the components primary ignition means 12, in particular to ensure the transmission or the amplification of the ignition of the components between the igniter plug 1 and the hand grenade 10.
  • the igniter plug 1 comprises a hollow body 4 of axis A adapted to receive said ignition means 12 consisting essentially of primary components, such as minus one or more primers, one or more igniters, etc., and optionally secondary components, such as at least one or more relays, retarders, amplifiers, etc., these components being for example superimposed on column.
  • ignition means 12 may comprise the same components as those equipping the current hand grenades 10.
  • the igniter plug 1 comprises known manner a striker 2 for striking the top of the ignition means 12, for example, its head primer, in order to initiate its ignition, this striker 2 being provided on a return blade 22 movable between a secure position and a position impacted, its secure position being locked by a safety pin 3 and / or provided by a trigger lever 20 held manually when the safety pin 3 is removed.
  • This trigger lever 20 commonly called a spoon, has a shape substantially in inverted L, the small branch extending over the top of the plug igniter 1 and the large branch extending to the side extending along a part of the hand grenade 10.
  • the lever of trigger 20 is articulated around a pivot 40 secured to the body 4 and biased in pivoting essentially by the return blade 22, assisted by the slide 70 described further, if the safety pin 3 is removed and if it is not maintained manually against the hand grenade 10.
  • This return blade 22 is disposed under the trip lever 20, pivotally mounted about an axis 41 secured to the body 4, symmetrical to the pivot 40, and biased towards the release lever 20 by a helical spring (not shown) disposed about the axis 41.
  • Striker 2 consists of a salient and pointed element, obtained for example in cutting and folding an area of the return blade 22 or by any added element on this return blade 22. It is positioned on this return blade 22 has a distance D of the axis 41 substantially equal to the distance d between this axis 41 of the axis A of the body 4 coincides with the axis of the hand grenade 10. This position allows him to be aligned with the ignition means 12 in the impact position.
  • the safety pin 3 consists of a substantially U-shaped rod, the two parallel branches 30, 31 of the U being housed in orifices provided in the body 4 of the igniter cap 1, delimiting two parallel bores 42, 43 arranged on both sides of the return blade 22 (see Fig. 3A, 3B).
  • the inner bore 42 receives the inner branch 30 of the safety pin 3 and the outer bore 43 receives its outer branch 31.
  • This safety pin 3 comprises, at the base of the U, a 32 loop arranged to receive a gripping ring 33. In inert position, this gripping ring 33 can be immobilized in a recess (not shown) provided for this purpose in the body 4.
  • This igniter plug 1 comprises a first safety mechanism 5 arranged to cooperate with the safety pin 3, this safety mechanism 5 being mobile, by manual action, between at least one passive position in which it prevents the removing the safety pin 3 and an active position in which it allows it.
  • this safety mechanism 5 comprises a hollow cylinder 50 traversed by a bore 52 of axis A adapted to receive the ignition means 12 and finished at the bottom by a tip 51 intended to be fixedly attached to said hand grenade 10, for example by screwing.
  • This barrel 50 is housed inside the body 4 with a relative degree of rotation between these two pieces around the axis A.
  • the cylinder 50 has a peripheral groove 53 of semicircular section and disposed opposite the inner bore 42.
  • This peripheral groove 53 comprises, in a predefined zone, a lateral clearance 53a, forming a section groove oblong (see Fig. 3A, 3B).
  • This lateral clearance 53a is arranged in such a way in the active position of the barrel 50, it is aligned with the bottom of the internal bore 42 and releases the passage for the inner branch 30 of the safety pin 3.
  • This inner branch 30 has, moreover, a recess 30a forming a stop intended to be supported on the barrel 50 when it is in the passive position.
  • the internal bore 42 provided in the body 4 is an oblong section bore substantially equal to twice the diameter of the inner branch 30 of the pin of safety 3 and the cylinder 50 has a diameter such that in the passive position it is salient in this internal bore 42 and does not allow the removal of the safety pin 3 and that active position it is flush with this bore 42 and allows the removal of the pin 3.
  • This cylinder 50 also comprises, in the upper part, at least one and in the example two stop stops 58, 58 'successive able to stop the pivoting of the return blade 22 to prevent striker 2 from striking the ignition means 12 when the cylinder 50 is in the passive position and at least one notch 59 adapted to allow the percussion when the cylinder 50 is in the active position.
  • the first stop 58 ' is a shoulder located on the path of the tail 22' of the return blade 22 and the second stop 58 is a shoulder located on the path of the return blade 22.
  • the igniter plug 1 comprises a second safety mechanism called an 6 and arranged to cooperate with the safety mechanism 5.
  • This locking member 6 is movable, by manual action, between at least two stable positions, a storage position in which it blocks the mechanism of security 5 in its passive position and an activation position in which it blocks the safety mechanism 5 in its active position, as well as a position intermediate in which it releases the security mechanism 5 allowing it to be Maneuvered between his passive and active positions.
  • This locking member 6 comprises a push button 60 housed in a bore blind 45 provided in the body 4 parallel to the axis A, at least one ball of blocking 61, housed in an orifice 46 provided in the body 4 and communicating with the blind bore 45 and the cylinder 50, as well as at least one return element 62 arranged to urge the push button 60 out of its bore 45.
  • This push button 60 is guided axially in the blind bore 45 of the body 4. It has at its free end a marker 67, for example black, the body of the push button 60 being for example of red color.
  • a marker 67 for example black
  • the body of the push button 60 being for example of red color.
  • the armed position of the Igniter plug 1 is easily recognizable by the red color of the button pusher 60 which appears when it is released in the activation position.
  • It includes in its non-free end an axial housing 63 for receiving the return element 62 against the bottom of the bore 45.
  • This return element 62 is constituted compression spring or any other equivalent element symbolized on the Figures 1B and 2B by its axis features.
  • this push button 60 comprises three peripheral zones of different diameters 64, 65, 66, intended for cooperate with the locking ball 61 to define the three positions of the organ of 6 lock, corresponding to three levels of 60 push button output 4. From top to bottom, with reference to FIGS.
  • this button pusher 60 has an area of smaller diameter 64 corresponding to the position intermediate, delimited by the bottom of the blind bore 45 and in which the button pusher 60 is substantially flush with the body 4, an area of average diameter 65 corresponding to the storage position in which the push button 60 exceeds about 2 to 3 mm from body 4 (see Figs 1A and 1B) and a larger diameter area 66 corresponding to the activation position in which the push button 60 protrudes by about 8 to 10 mm from the body 4 (see Fig. 2, 4 and 6).
  • the cylinder 50 has a first lateral hole 54 disposed opposite the orifice 46 of the body 4 and able to receive the locking ball 61, when it is in the passive position, this which corresponds to the storage position of the push button 60 (see Figs 1A and 1B).
  • This barrel 50 also has a second hole 55 lateral deeper than the first 54, intended to receive the locking ball 61 when it is in the active position, which corresponds to the activation position of the pushbutton 60 (see Figs 2A and 2B).
  • the two holes 54, 55 are separated by an angle less than 90 ° and for example equal to 60 °.
  • the transition from the passive position to the active position of the barrel 50 is obtained by a rotational movement of the body 4 relative to the barrel 50 about the axis A, exerted manually directly on the body 4 or through the hand grenade 10 on the barrel 50.
  • the barrel 50 of the safety mechanism 5 also comprises a return element 56 coaxial with the axis A and arranged to solicit this cylinder 50 to its passive position.
  • This return element 56 consists of a spiral spring wound around the barrel 50, one end of this spring being fixed to the body 4 and the other end to the barrel 50. Its activation will be explained later with reference to the functioning of the igniter plug 1.
  • the igniter plug 1 comprises a third mechanism of security called ignition interruption means 7 associated with the means 12.
  • These means for interrupting the ignition 7 are arranged to be moving between a storage position in which they form a fire barrier intended to prevent the passage of fire from the ignition means 12 to the grenade at hand 10 and an ignition position in which the fire barrier clears for allow the passage of the fire from the ignition means 12 to the hand grenade 10 for turn on the explosive charge 11 and detonate it.
  • the means for interrupting the ignition 7 comprise a slider 70 arranged transversely in the body 4 the igniter plug 1 along an axis B perpendicular to the axis A and provided with a outer end adapted to cooperate with the trip lever 20 and a inner end coupled to a return member 71.
  • This slider 70 is maintained in the retracted position corresponding to its storage position by the lever of tripping 20 which bears directly on the outer end of the slider 70, as long as this trip lever 20 is in the secured position obtained either by the safety pin 3 which locks both the return blade 22 and the lever of trigger 20, or by manual pressure of the trigger lever 20 against hand grenade 10 (Fig. 5A).
  • This slider 70 moves along the axis B in its output position corresponding to its ignition position under the action of its organ as soon as the release lever 20 leaves the safe position (FIG. 5B).
  • This slide 70 is provided with an anti-fire screen 72 forming the fire barrier in safety position and a bore 73 releasing a fire passage in position ignition.
  • the spacing E between the fire screen 72 and the bore 73 corresponds substantially to the stroke C of the slider 70 between its two positions, this stroke C being limited for example by a shoulder 75 arranged to abut against a wall 49 of the body 4 forming a stop in translation along the axis B.
  • Other equivalent embodiments may also be suitable.
  • the body 4 also has a distal cavity 48 arranged in the extension of the housing 47 opposite the trigger lever 20 to receive the body of recall 73 consisting for example of a compression spring.
  • this distal cavity 48 is delimited by a cap 48 'reported recess audit body by screwing for example.
  • the recess 57 provided in the barrel 50 is partially open radially to allow relative rotation between the body 4 and the cylinder 50 by limiting the angular deflection to a predefined angle ⁇ less than 90 ° and for example substantially equal to 60 °.
  • Sealing members for example in the form of an O-ring housed in a peripheral groove 74 between the housing 47 and the slider 70 and a washer 76 provided between the cavity 48 and the slider 70 may be provided to protect a part of the components of the pyrotechnic chain of external aggressions, in particular of the humidity.
  • the slider 70 is made of a fire resistant material selected from the group comprising at least metals and metal alloys, such as for example steel, brass, Zamac®, etc. This slider 70 must also have dimensions sufficient to withstand fire and in particular a thickness adapted at least in the area of its fire screen and defined according to the chosen subject. For economic reasons, it will be chosen to make the slider 70 into Zamac® with a thickness equal to 4 mm for example, these choices being in no way limiting.
  • the slider 70 is disposed between the means ignition 12 and the tip 51 that is downstream at least of the primary components included in these ignition means 12 and upstream only components provided in both the tip 51 of the igniter plug 1 and in the Hand Grenade 10. This provision thus ensures the interruption of the pyrotechnic chain of the hand grenade 10 equipped with its lighter plug 1 in secure position or storage.
  • the safety pin 3 housed in the body 4 of the igniter cap 1 locks the return blade 22 associated with the lever of triggering 20.
  • the barrel 50 of the safety mechanism 5 is locked in passive position by the push button 60 preventing the removal of the pin from security 3 (Fig. 3A).
  • the locking ball 61 positioned between the diameter zone means 65 and the first hole 54 secures the cylinder 50 to the body 4 ( Figure 1B).
  • the landmark 67 of this push button 60 is visible and slightly protruding on the upper body 4 of the igniter plug 1.
  • the slider 70 of the ignition interruption means 7 is locked in the retracted position corresponding to its storage position by the lever 20, the fire screen 72 being centered on the axis A (FIG 5A) for interrupt the pyrotechnic chain.
  • the hand grenade 10 equipped with its lighter plug 1 is totally secure, can not under any circumstances to be struck even in case of false manipulation or fall.
  • the fire screen 72 prevents the firing of the hand grenade 10 even in the case of initiation inadvertent ignition means 12.
  • the user must then turn the body 4 relative to the barrel 50, or vice versa via the hand grenade 10, an angle ⁇ substantially equal to 60 ° to bring the barrel 50 in its active position (FIG 3B), delimited by the recess 57 provided in the barrel 50.
  • the arrow F shows the direction of rotation of the barrel 50 relative to the body 4. If the body 4 is rotated relative to the cylinder 50, the direction of rotation is reversed. During this relative rotation, the push button 60 remains in its intermediate position, the locking ball 61 preventing its ascent. As soon as the rotation is made, the second hole 55 of the barrel 50 is placed in view of the orifice 46 to receive the locking ball 61 which locks in its active position.
  • the locking ball 61 can not lodge in the second hole 55 of the cylinder 50 and block the latter in its active position. As a result, the barrel 50 automatically returns to its passive position under the effect from its spiral spring 56. At the same time, the push button 60 can not be move to its activation position and then returns to its storage position replacing the ignition plug 1 in the secure position (see Fig. 1A, 1B, 6A).
  • the user can either continue the process or return to the secure position as in FIGS. 1A, 1B by pressing the pushbutton 60 to allow the automatic return of the barrel 50 in the passive position.
  • the user must remove the safety pin 3 by the gripping ring 33 with one hand while holding the trigger lever 20 against the hand grenade 10 with the other hand. In this position halfway between the armed position and the position impacted, the slider 70 is always returned guaranteeing the interruption of the chain pyrotechnic.
  • the trigger lever 20 releases the slide 70 which automatically translates into output position corresponding to its ignition position under the action of its organ spring 71 of a stroke C to present its bore 73 substantially in the axis A thus allowing the passage of the fire from the ignition means 12 to the hand grenade 10 generating his firing.
  • the slider 70 contributes to the pivoting of the trip lever 20.
  • the arming of a hand grenade 10 by means of of the igniter plug 1 according to the invention becomes a totally thought-out act and voluntary and can not operate unexpectedly. Indeed, its firing can not be initiated than by the combination of two independent events: the first event being the rotation of the barrel 50 after depression of the push button 60, and the second event being the release of the trip lever 20 after removal of the safety pin 3.
  • this igniter plug 1 ensuring the interruption of the pyrotechnic chain, allows to meet perfectly the standards in force.
  • the igniter plug 1 according to the invention is designed to be easily reversible until the user has released the release lever 20, for put the hand grenade 10 equipped with its lighter plug 1 in position totally secure.
  • the design of this igniter plug 1 presents the advantage of being simple, reliable and economical.

Abstract

An ignition cap (1) for a hand grenade (10), comprising a hollow body (4), a lever (20) with a spring strip (22) and a security pin (3), has an igniter (12) with a primer and an interrupter (7) that acts as a fire barrier in the storage position. The interrupter is in the form of a spring-loaded slider (70) of a metal such as zamac, with a fire-proof screen (72) and an aperture (73) that allows fire through when aligned with the primer. The security pin can only be removed after releasing a lock (6) and rotating the barrel (50) of the igniter.

Description

La présente invention concerne un bouchon allumeur pour grenade à main comportant au moins un corps creux d'axe A, un levier de déclenchement articulé par rapport au corps et sollicité par au moins une lame de rappel entre une position sécurisée et une position percutée, une goupille de sécurité couplée au levier de déclenchement pour le verrouiller dans la position sécurisée et au moins un percuteur associé à ladite lame de rappel, des moyens d'allumage constitués au moins de composants dits primaires et des moyens d'interruption de l'allumage agencés pour être mobiles entre une position de stockage dans laquelle ils forment une barrière de feu destinée à empêcher le passage du feu des moyens d'allumage vers ladite grenade à main, cette position de stockage étant maintenue par ledit levier de déclenchement tant qu'il est en position sécurisée, et une position d'allumage dans laquelle ladite barrière de feu s'efface pour autoriser le passage du feu des moyens d'allumage vers ladite grenade à main en vue de son explosion, cette position d'allumage étant sollicitée par au moins un organe de rappel lorsque ledit levier de déclenchement quitte sa position sécurisée. L'invention concerne également une grenade à main équipée d'un bouchon allumeur tel que défini ci-dessus.The present invention relates to an igniter plug for hand grenade comprising at least one hollow body of axis A, a trigger lever articulated by relative to the body and biased by at least one return blade between a position secure position and a percussive position, a safety pin coupled to the lever of trigger to lock it in the secure position and at least one firing pin associated with said return blade, ignition means consisting of at least so-called primary components and means for interrupting the ignition arranged for be movable between a storage position in which they form a barrier of fire intended to prevent the passage of fire from the means of ignition towards said grenade by hand, this storage position being maintained by said trigger lever as long as it is in a secure position, and an ignition position in which said fire barrier clears to allow the passage of fire from the means of ignition towards said hand grenade with a view to its explosion, this ignition position being biased by at least one return member when said release lever leaves his secure position. The invention also relates to a hand grenade equipped with an igniter plug as defined above.

Ce type de bouchon allumeur se trouve de manière courante sur toutes les grenades à main bien connues dans le domaine de l'armement. Une fois la goupille de sécurité enlevée, l'utilisateur doit maintenir fermement le levier de déclenchement contre la grenade pour éviter sa mise à feu, laquelle se déclenche dès que le levier de déclenchement est libéré, libérant également le percuteur. Cette goupille de sécurité peut être retirée facilement voire inopinément par exemple en cas de chute, risquant de blesser même de tuer l'utilisateur de la grenade à main et/ou les personnes proches. On cherche aujourd'hui à renforcer la sécurité des bouchons allumeur pour éviter ces risques d'accident. This type of igniter plug is commonly found on all grenades. hand well known in the field of armament. Once the safety pin removed, the user must hold the release lever firmly against the pomegranate to prevent firing, which is triggered as soon as the trigger is released, also releasing the striker. This safety pin can be removed easily or even unexpectedly, for example in the event of a fall, risking to even hurt to kill the hand grenade user and / or people relatives. Today, we are trying to strengthen the safety of lighter plugs for avoid these risks of accident.

Certaines solutions consistent à empêcher le retrait accidentel de la goupille de sécurité comme dans les publications US-A-3 865 027 et US-A-3 765 337. D'autres solutions consistent à bloquer le mécanisme de percussion comme dans les publications CH-A-466 094, US-A-1 521 996 et GB-A-1 232 283. D'autres solutions encore consistent à désaxer le percuteur ou l'amorce par rapport à la chaíne pyrotechnique comme dans les publications US-A-2 737 116, US-A-4 730 559 et FR 2 825 462.Some solutions are to prevent the accidental removal of the pin from as in US-A-3,865,027 and US-A-3,765,337. solutions consist in blocking the percussion mechanism as in the publications CH-A-466 094, US-A-1,521,996 and GB-A-1,232,283. Other solutions still consist in offsetting the firing pin or the primer with respect to the chain pyrotechnic as in US-A-2,737,116, US-A-4,730,559 and FR 2,825,462.

Les dispositifs de sécurité des solutions mentionnées ci-dessus n'assurent qu'un seul niveau de sécurité, ce qui est nettement insuffisant pour éviter les risques d'accident. Seul le dispositif de sécurité décrit dans la publication FR 2 825 462, du même titulaire que la présente invention, permet d'atteindre trois niveaux de sécurité, d'où une sécurité optimale pour les utilisateurs de grenades à main.The security features of the solutions mentioned above only ensure a single level of safety, which is clearly insufficient to avoid the risk of accidents. Only the security device described in the publication FR 2 825 462, of the same the present invention, makes it possible to achieve three levels of security, hence optimal security for users of hand grenades.

Toutefois, cette solution ne permet pas de répondre à certaines conditions de sécurité stipulées notamment dans la norme américaine STANAG 4497 en vigueur. En effet, cette norme impose que la mise à feu de la grenade à main soit commandée par deux évènements distincts et que la chaíne pyrotechnique soit interrompue en position de sécurité ou de stockage de la grenade à main pourvu de son bouchon allumeur. On entend par interruption de la chaíne pyrotechnique, une séparation physique entre les composants dits primaires très sensibles comme les amorces, les inflammateurs, les détonateurs, etc. et les composants dits secondaires moins sensibles comme les relais, les retardateurs, les charges, etc. de cette chaíne pyrotechnique. Cette contrainte liée à l'interruption de la chaíne pyrotechnique a pour objectif d'éviter la mise à feu accidentelle des composants secondaires dans le cas où les composants primaires seraient initiés alors que la grenade à main équipée de son bouchon allumeur est en position de stockage ou de sécurité. However, this solution does not meet certain security conditions stipulated in particular in the American standard STANAG 4497 in force. Indeed, this standard requires that the firing of the hand grenade be controlled by two events and that the pyrotechnic chain is interrupted in a position of security or storage of the hand grenade provided with its lighter plug. We means by interruption of the pyrotechnic chain, a physical separation between so-called primary, highly sensitive components such as primers, igniters, detonators, etc. and the so-called secondary less sensitive components such as relays, retarders, charges, etc. of this pyrotechnic chain. This constraint related to the purpose of the interruption of the pyrotechnic chain is to avoid firing accidental secondary components in the case where the primary components would be initiated while the hand grenade equipped with its igniter plug is in storage or security position.

Certaines solutions consistent à loger une partie des composants de la chaíne pyrotechnique dans un coulisseau mobile transversalement entre une position de stockage dans laquelle les composants de la chaíne pyrotechnique ne sont pas alignés et une position d'allumage dans laquelle ils sont alignés, comme dans la publication FR-A-2 500 620. D'autres solutions consistent à prévoir un organe mécanique interposé dans la chaíne pyrotechnique et mobile transversalement entre une position de stockage et une position d'allumage, comme dans les publications FR-A-2 216 548 et FR-A-2 696 823. Toutefois, ces différentes solutions sont complexes et coûteuses à réaliser. De plus, la solution décrite dans la publication FR-A-2 216 548 ne permet pas de répondre aux normes étant donné qu'elle n'assure pas une séparation mécanique effective entre les composants de la chaíne pyrotechnique. Ces solutions ne sont dons pas satisfaisantes.Some solutions consist of housing part of the components of the chain pyrotechnics in a slide movable transversely between a position of storage in which the components of the pyrotechnic chain are not aligned and an ignition position in which they are aligned, as in the publication FR-A-2 500 620. Other solutions consist in providing a mechanical member interposed in the pyrotechnic chain and movable transversely between a position storage and an ignition position, as in publications FR-A-2 216 548 and FR-A-2 696 823. However, these various solutions are complex and expensive to make. In addition, the solution described in the publication FR-A-2 216 548 does not meet standards as it does not provide separation effective mechanics between the components of the pyrotechnic chain. These solutions are not satisfactory.

La présente invention vise à résoudre ce problème en proposant un bouchon allumeur assurant l'interruption de la chaíne pyrotechnique et comprenant un dispositif de sécurité à trois niveaux évitant la mise à feu accidentelle de la grenade à main, tout en autorisant la réversibilité du dispositif de sécurité, ce bouchon allumeur étant d'une conception simple, fiable et économique.The present invention aims to solve this problem by proposing an igniter plug ensuring the interruption of the pyrotechnic chain and comprising a device for three-level safety preventing accidental firing of the hand grenade, while by allowing the reversibility of the safety device, this igniter plug being a simple, reliable and economical design.

Dans ce but, l'invention concerne un bouchon allumeur du genre indiqué en préambule, caractérisé en ce que les moyens d'interruption de l'allumage comportent au moins un coulisseau mobile transversalement dans un logement transversal du corps, ce coulisseau étant pourvu au moins d'un écran anti-feu formant la barrière de feu en position de stockage, d'un alésage libérant un passage de feu en position d'allumage et d'une extrémité extérieure saillante coopérant avec le levier de déclenchement et en ce que le corps comporte une cavité distale disposée dans le prolongement du logement à l'opposé du levier de déclenchement et apte à recevoir l'organe de rappel coopérant avec l'extrémité intérieure du coulisseau. For this purpose, the invention relates to an igniter plug of the kind indicated in preamble, characterized in that the means for interrupting the ignition comprise at least one movable slider transversely in a transverse housing of the body, this slide being provided with at least one fire screen forming the barrier of fire in storage position, a bore releasing a passage of fire in position ignition and a protruding outer end cooperating with the lever of triggering and in that the body has a distal cavity disposed in the extension of the housing opposite the trigger lever and able to receive the return member cooperating with the inner end of the slide.

Dans une forme de réalisation préférée, l'écran anti-feu et l'alésage sont distants d'un entraxe sensiblement égal à la course entre les deux positions du coulisseau, cette course pouvant être limitée par un épaulement prévu sur ledit coulisseau et apte à coopérer avec une paroi dudit corps.In a preferred embodiment, the fire screen and the bore are distant from one another. distance substantially equal to the stroke between the two positions of the slide, this stroke that can be limited by a shoulder provided on said slide and adapted to cooperate with a wall of said body.

Les moyens d'interruption de l'allumage peuvent également comporter au moins un organe d'étanchéité disposé entre le corps et le coulisseau.The means for interrupting the ignition may also comprise at least one sealing member disposed between the body and the slide.

Le coulisseau est avantageusement réalisé dans une matière résistante au feu choisie parmi le groupe comprenant au moins les métaux et les alliages métalliques, cette matière pouvant être par exemple du Zamac®. L'épaisseur du coulisseau, notamment dans la zone de l'écran anti-feu, est également choisie pour résister au feu.The slide is advantageously made of a selected fire-resistant material among the group comprising at least metals and metal alloys, this material which may be, for example, Zamac®. The thickness of the slider, in particular in the area of the fire screen, is also chosen to withstand fire.

Les moyens d'interruption de l'allumage sont au moins disposés en aval au moins des composants dits primaires des moyens d'allumage.The means for interrupting the ignition are at least disposed downstream at least so-called primary components of the ignition means.

Dans la forme de réalisation préférée, le bouchon allumeur comporte un barillet creux d'axe A logé à l'intérieur du corps et pourvu en partie inférieure d'un embout destiné à être fixé à la grenade à main, le corps et le barillet étant mobiles en rotation l'un par rapport à l'autre entre une position passive dans laquelle le barillet empêche le retrait de la goupille de sécurité et une position active dans laquelle le barillet autorise le retrait de la goupille de sécurité.In the preferred embodiment, the igniter plug comprises a barrel hollow axis A housed inside the body and provided in the lower part of a mouthpiece intended to be attached to the hand grenade, the body and the barrel being rotatable relative to each other between a passive position in which the barrel prevents removing the safety pin and an active position in which the barrel allows the removal of the safety pin.

Le barillet comporte avantageusement un alésage traversant d'axe A apte à recevoir les moyens d'allumage et un évidement transversal disposé en regard du logement traversé par ledit coulisseau, cet évidement étant agencé pour autoriser et limiter la rotation relative du corps par rapport au barillet d'un angle α prédéfini inférieur à 90° et par exemple égal à 60°. The barrel advantageously comprises a through bore of axis A adapted to receive the ignition means and a transverse recess arranged opposite the housing traversed by said slide, this recess being arranged to allow and limit the relative rotation of the body relative to the barrel by a predefined angle α less than 90 ° and for example equal to 60 °.

Le barillet peut comporter en partie supérieure au moins une butée d'arrêt apte à empêcher le percuteur prévu sur la lame de rappel de frapper les moyens d'allumage lorsque le barillet est en position passive et au moins une encoche apte à autoriser la percussion lorsque le barillet est en position active.The barrel may comprise in the upper part at least one stop stop adapted to prevent the firing pin provided on the return blade from striking the ignition means when the barrel is in the passive position and at least one notch able to authorize the percussion when the barrel is in the active position.

Dans ce but également, l'invention concerne une grenade à main caractérisée en ce qu'elle est équipée d'un bouchon allumeur tel que défini ci-dessus.For this purpose also, the invention relates to a hand grenade characterized in that it is equipped with an igniter plug as defined above.

La présente invention et ses avantages apparaítront mieux dans la description suivante d'un mode de réalisation, donné à titre d'exemple non limitatif, en référence aux dessins annexés, dans lesquels :

  • les figures 1A et 1B sont des vues en coupe axiale du bouchon allumeur selon l'invention, assemblé à une grenade à main, en position sécurisée, respectivement selon les lignes de coupe AA et BB, la figure 1B étant agrandie,
  • les figures 2A et 2B sont des vues similaires à celles des figures 1A et 1B, en position armée,
  • les figures 3A et 3B sont des vues en coupe transversale du bouchon allumeur selon la ligne de coupe CC des figures 1 et 2, illustrant respectivement les positions passive et active du barillet correspondant aux positions sécurisée et armée du bouchon allumeur,
  • la figure 4 est une vue similaire aux figures 1A et 2A, en cours de percussion,
  • les figures 5A et 5B sont des vues en coupe transversale du bouchon allumeur selon les axes DD respectivement des figures 1A et 4, illustrant respectivement les positions de stockage et d'allumage des moyens d'interruption de l'allumage, et
  • les figures 6A et 6B sont des vues en coupe axiale agrandies du bouchon allumeur de la figure 4, le levier de déclenchement étant retiré, illustrant respectivement les positions bloquée et percutée dudit bouchon allumeur.
The present invention and its advantages will appear better in the following description of an embodiment, given by way of non-limiting example, with reference to the appended drawings, in which:
  • FIGS. 1A and 1B are views in axial section of the igniter plug according to the invention, assembled with a hand grenade, in the secured position, respectively along the AA and BB cutting lines, FIG. 1B being enlarged,
  • FIGS. 2A and 2B are views similar to those of FIGS. 1A and 1B, in the armed position,
  • FIGS. 3A and 3B are cross-sectional views of the igniter plug along the section line CC of FIGS. 1 and 2, respectively illustrating the passive and active positions of the barrel corresponding to the secured and armed positions of the igniter plug,
  • FIG. 4 is a view similar to FIGS. 1A and 2A, during percussion,
  • FIGS. 5A and 5B are cross-sectional views of the igniter plug along the axes DD respectively of FIGS. 1A and 4, respectively illustrating the storage and ignition positions of the means for interrupting ignition, and
  • FIGS. 6A and 6B are enlarged axial sectional views of the igniter plug of FIG. 4, the release lever being removed, respectively illustrating the locked and impacted positions of said igniter plug.

En référence aux figures, le bouchon allumeur 1 selon l'invention est destiné à équiper une grenade à main 10 pourvue au moins d'une charge explosive 11. Les moyens d'allumage 12 de cette charge explosive 11, faisant partie de la chaíne pyrotechnique, sont dissociés de la grenade à main 10 et logés dans le bouchon allumeur 1. On appelle "chaíne pyrotechnique" l'ensemble des composants primaires et secondaires allant de l'amorce de tête à la charge explosive. L'objectif de l'invention est de centraliser au moins les composants dits primaires très sensibles comme les amorces, les inflammateurs, etc. dans le bouchon allumeur 1 pour n'avoir dans la grenade à main 10 proprement dite plus que des composants dits secondaires donc moins sensibles comme la poudre de la charge explosive 11 et éventuellement un ou plusieurs retardateurs, relais, amplificateurs, etc. Certains composants secondaires comme les relais et/ou amplificateurs peuvent bien entendu être également logés dans le bouchon allumeur 1 en complément des composants primaires des moyens d'allumage 12, notamment pour assurer la transmission voire l'amplification de l'allumage des composants entre le bouchon allumeur 1 et la grenade à main 10.With reference to the figures, the igniter plug 1 according to the invention is intended for equipped with a hand grenade with at least one explosive charge. ignition means 12 of this explosive charge 11, forming part of the chain pyrotechnic, are dissociated from the hand grenade 10 and housed in the cap igniter 1. We call "pyrotechnic chain" the set of primary components and secondary from the head primer to the explosive charge. The objective of the invention is to centralize at least the so-called primary components very sensitive like primers, igniters, etc. in the igniter plug 1 to have no in the hand grenade 10 itself more than so-called secondary components therefore less sensitive like the powder of the explosive charge 11 and possibly one or more retarders, relays, amplifiers, etc. Some components such as relays and / or amplifiers can of course be also housed in the ignition plug 1 in addition to the components primary ignition means 12, in particular to ensure the transmission or the amplification of the ignition of the components between the igniter plug 1 and the hand grenade 10.

Le bouchon allumeur 1 comporte un corps 4 creux d'axe A apte à recevoir lesdits moyens d'allumage 12 constitués essentiellement de composants primaires, tels qu'au moins une ou plusieurs amorces, un ou plusieurs inflammateurs, etc., et éventuellement des composants secondaires, tels qu'au moins un ou plusieurs relais, retardateurs, amplificateurs, etc., ces composants étant par exemple superposés en colonne. Ces moyens d'allumage 12 peuvent comporter les mêmes composants que ceux équipant les grenades à main 10 actuelles. Le bouchon allumeur 1 comporte de manière connue un percuteur 2 destiné à frapper le dessus des moyens d'allumage 12, par exemple son amorce de tête, en vue d'initier son allumage, ce percuteur 2 étant prévu sur une lame de rappel 22 mobile entre une position sécurisée et une position percutée, sa position sécurisée étant verrouillée par une goupille de sécurité 3 et/ou assurée par un levier de déclenchement 20 maintenu manuellement lorsque la goupille de sécurité 3 est retirée.The igniter plug 1 comprises a hollow body 4 of axis A adapted to receive said ignition means 12 consisting essentially of primary components, such as minus one or more primers, one or more igniters, etc., and optionally secondary components, such as at least one or more relays, retarders, amplifiers, etc., these components being for example superimposed on column. These ignition means 12 may comprise the same components as those equipping the current hand grenades 10. The igniter plug 1 comprises known manner a striker 2 for striking the top of the ignition means 12, for example, its head primer, in order to initiate its ignition, this striker 2 being provided on a return blade 22 movable between a secure position and a position impacted, its secure position being locked by a safety pin 3 and / or provided by a trigger lever 20 held manually when the safety pin 3 is removed.

Ce levier de déclenchement 20, appelé communément une cuillère, a une forme sensiblement en L inversé, la petite branche s'étendant sur le dessus du bouchon allumeur 1 et la grande branche s'étendant sur le côté en se prolongeant le long d'une partie de la grenade à main 10. A l'extrémité de sa petite branche, le levier de déclenchement 20 est articulé autour d'un pivot 40 solidaire du corps 4 et sollicité en pivotement essentiellement par la lame de rappel 22, aidé par le coulisseau 70 décrit plus loin, si la goupille de sécurité 3 est retirée et s'il n'est pas maintenu manuellement contre la grenade à main 10. Cette lame de rappel 22 est disposée sous le levier de déclenchement 20, montée pivotante autour d'un axe 41 solidaire du corps 4, symétrique au pivot 40, et sollicitée en direction du levier de déclenchement 20 par un ressort hélicoïdal (non représenté) disposé autour de l'axe 41.This trigger lever 20, commonly called a spoon, has a shape substantially in inverted L, the small branch extending over the top of the plug igniter 1 and the large branch extending to the side extending along a part of the hand grenade 10. At the end of its small branch, the lever of trigger 20 is articulated around a pivot 40 secured to the body 4 and biased in pivoting essentially by the return blade 22, assisted by the slide 70 described further, if the safety pin 3 is removed and if it is not maintained manually against the hand grenade 10. This return blade 22 is disposed under the trip lever 20, pivotally mounted about an axis 41 secured to the body 4, symmetrical to the pivot 40, and biased towards the release lever 20 by a helical spring (not shown) disposed about the axis 41.

Le percuteur 2 est constitué d'un élément saillant et pointu, obtenu par exemple en découpant et en pliant une zone de la lame de rappel 22 ou par tout élément rapporté sur cette lame de rappel 22. Il est positionné sur cette lame de rappel 22 a une distance D de l'axe 41 sensiblement égale à la distance d séparant cet axe 41 de l'axe A du corps 4 confondu avec l'axe de la grenade à main 10. Cette position lui permet d'être aligné avec les moyens d'allumage 12 en position percutée. Striker 2 consists of a salient and pointed element, obtained for example in cutting and folding an area of the return blade 22 or by any added element on this return blade 22. It is positioned on this return blade 22 has a distance D of the axis 41 substantially equal to the distance d between this axis 41 of the axis A of the body 4 coincides with the axis of the hand grenade 10. This position allows him to be aligned with the ignition means 12 in the impact position.

La goupille de sécurité 3 est constituée d'une tige sensiblement en forme de U, les deux branches 30, 31 parallèles du U étant logées dans des orifices prévus dans le corps 4 du bouchon allumeur 1, délimitant deux alésages 42, 43 parallèles disposés de part et d'autre de la lame de rappel 22 (cf. fig. 3A, 3B). L'alésage intérieur 42 reçoit la branche intérieure 30 de la goupille de sécurité 3 et l'alésage extérieur 43 reçoit sa branche extérieure 31. Ainsi, le levier de déclenchement 20 et la lame de rappel 22 sont verrouillés par la branche extérieure 31 de la goupille de sécurité 3 positionnée entre eux. Cette goupille de sécurité 3 comporte, à la base du U, une boucle 32 agencée pour recevoir un anneau de préhension 33. En position inerte, cet anneau de préhension 33 peut être immobilisé dans un évidement (non représenté) prévu à cet effet dans le corps 4.The safety pin 3 consists of a substantially U-shaped rod, the two parallel branches 30, 31 of the U being housed in orifices provided in the body 4 of the igniter cap 1, delimiting two parallel bores 42, 43 arranged on both sides of the return blade 22 (see Fig. 3A, 3B). The inner bore 42 receives the inner branch 30 of the safety pin 3 and the outer bore 43 receives its outer branch 31. Thus, the trigger lever 20 and the blade of return 22 are locked by the outer branch 31 of the safety pin 3 positioned between them. This safety pin 3 comprises, at the base of the U, a 32 loop arranged to receive a gripping ring 33. In inert position, this gripping ring 33 can be immobilized in a recess (not shown) provided for this purpose in the body 4.

Ce bouchon allumeur 1 comporte un premier mécanisme de sécurité 5 agencé pour coopérer avec la goupille de sécurité 3, ce mécanisme de sécurité 5 étant mobile, par action manuelle, entre au moins une position passive dans laquelle il empêche le retrait de la goupille de sécurité 3 et une position active dans laquelle il l'autorise. Il comporte un barillet 50 creux traversé par un alésage 52 d'axe A apte à recevoir les moyens d'allumage 12 et terminé en partie inférieure par un embout 51 destiné à être fixé solidairement à ladite grenade à main 10, par exemple par vissage. Ce barillet 50 est logé à l'intérieur du corps 4 moyennant un degré de rotation relative entre ces deux pièces autour de l'axe A.This igniter plug 1 comprises a first safety mechanism 5 arranged to cooperate with the safety pin 3, this safety mechanism 5 being mobile, by manual action, between at least one passive position in which it prevents the removing the safety pin 3 and an active position in which it allows it. he comprises a hollow cylinder 50 traversed by a bore 52 of axis A adapted to receive the ignition means 12 and finished at the bottom by a tip 51 intended to be fixedly attached to said hand grenade 10, for example by screwing. This barrel 50 is housed inside the body 4 with a relative degree of rotation between these two pieces around the axis A.

Le barillet 50 comporte une rainure périphérique 53, de section semi-circulaire et disposée en regard de l'alésage intérieur 42. Cette rainure périphérique 53 comporte, dans une zone prédéfinie, un dégagement latéral 53a, formant une rainure de section oblongue (cf. fig. 3A, 3B). Ce dégagement latéral 53a est disposé de telle manière qu'en position active du barillet 50, il est aligné avec le fond de l'alésage intérieur 42 et libère le passage pour la branche intérieure 30 de la goupille de sécurité 3. Cette branche intérieure 30 comporte, par ailleurs, un décrochement 30a formant une butée destinée à être en appui sur le barillet 50 quand il est en position passive. Ainsi, l'alésage intérieur 42 prévu dans le corps 4 est un alésage de section oblongue sensiblement égal à deux fois le diamètre de la branche intérieure 30 de la goupille de sécurité 3 et le barillet 50 a un diamètre tel qu'en position passive il est saillant dans cet alésage intérieur 42 et n'autorise pas le retrait de la goupille de sécurité 3 et qu'en position active il est affleurant à cet alésage 42 et autorise le retrait de la goupille 3. Ce barillet 50 comporte également, en partie supérieure, au moins une et dans l'exemple deux butées d'arrêt 58, 58' successives aptes à arrêter le pivotement de la lame de rappel 22 pour empêcher le percuteur 2 de frapper les moyens d'allumage 12 lorsque le barillet 50 est en position passive et au moins une encoche 59 apte à autoriser la percussion lorsque le barillet 50 est en position active. La première butée 58' est un épaulement situé sur le trajet de la queue 22' de la lame de rappel 22 et la seconde butée 58 est un épaulement situé sur le trajet de la lame de rappel 22.The cylinder 50 has a peripheral groove 53 of semicircular section and disposed opposite the inner bore 42. This peripheral groove 53 comprises, in a predefined zone, a lateral clearance 53a, forming a section groove oblong (see Fig. 3A, 3B). This lateral clearance 53a is arranged in such a way in the active position of the barrel 50, it is aligned with the bottom of the internal bore 42 and releases the passage for the inner branch 30 of the safety pin 3. This inner branch 30 has, moreover, a recess 30a forming a stop intended to be supported on the barrel 50 when it is in the passive position. So, the internal bore 42 provided in the body 4 is an oblong section bore substantially equal to twice the diameter of the inner branch 30 of the pin of safety 3 and the cylinder 50 has a diameter such that in the passive position it is salient in this internal bore 42 and does not allow the removal of the safety pin 3 and that active position it is flush with this bore 42 and allows the removal of the pin 3. This cylinder 50 also comprises, in the upper part, at least one and in the example two stop stops 58, 58 'successive able to stop the pivoting of the return blade 22 to prevent striker 2 from striking the ignition means 12 when the cylinder 50 is in the passive position and at least one notch 59 adapted to allow the percussion when the cylinder 50 is in the active position. The first stop 58 'is a shoulder located on the path of the tail 22' of the return blade 22 and the second stop 58 is a shoulder located on the path of the return blade 22.

Le bouchon allumeur 1 comporte un deuxième mécanisme de sécurité appelé organe de verrouillage 6 et agencé pour coopérer avec le mécanisme de sécurité 5. Cet organe de verrouillage 6 est mobile, par action manuelle, entre au moins deux positions stables, une position de stockage dans laquelle il bloque le mécanisme de sécurité 5 dans sa position passive et une position d'activation dans laquelle il bloque le mécanisme de sécurité 5 dans sa position active, ainsi qu'une position intermédiaire dans laquelle il libère le mécanisme de sécurité 5 lui permettant d'être manoeuvré entre ses positions passive et active.The igniter plug 1 comprises a second safety mechanism called an 6 and arranged to cooperate with the safety mechanism 5. This locking member 6 is movable, by manual action, between at least two stable positions, a storage position in which it blocks the mechanism of security 5 in its passive position and an activation position in which it blocks the safety mechanism 5 in its active position, as well as a position intermediate in which it releases the security mechanism 5 allowing it to be Maneuvered between his passive and active positions.

Cet organe de verrouillage 6 comporte un bouton poussoir 60 logé dans un alésage borgne 45 prévu dans le corps 4 parallèlement à l'axe A, au moins une bille de blocage 61, logée dans un orifice 46 prévu dans le corps 4 et communiquant avec l'alésage borgne 45 et le barillet 50, ainsi qu'au moins un élément de rappel 62 agencé pour solliciter le bouton poussoir 60 vers l'extérieur de son alésage 45. This locking member 6 comprises a push button 60 housed in a bore blind 45 provided in the body 4 parallel to the axis A, at least one ball of blocking 61, housed in an orifice 46 provided in the body 4 and communicating with the blind bore 45 and the cylinder 50, as well as at least one return element 62 arranged to urge the push button 60 out of its bore 45.

Ce bouton poussoir 60 est guidé axialement dans l'alésage borgne 45 du corps 4. Il comporte à son extrémité libre un repère 67 par exemple de couleur noire, le corps du bouton poussoir 60 étant par exemple de couleur rouge. Ainsi, la position armée du bouchon allumeur 1 est facilement reconnaissable par la couleur rouge du bouton poussoir 60 qui apparaít lorsqu'il est sorti en position d'activation. Il comporte dans son extrémité non libre un logement axial 63 destiné à recevoir l'élément de rappel 62 en appui contre le fond de l'alésage 45. Cet élément de rappel 62 est constitué d'un ressort de compression ou de tout autre élément équivalent symbolisé sur les figures 1B et 2B par ses traits d'axe. Dans sa partie médiane, ce bouton poussoir 60 comporte trois zones périphériques de diamètres différents 64, 65, 66, destinées à coopérer avec la bille de blocage 61 pour définir les trois positions de l'organe de verrouillage 6, correspondant à trois niveaux de sortie du bouton poussoir 60 par rapport audit corps 4. De haut en bas, en référence aux figures 1B et 2B, ce bouton poussoir 60 comporte une zone de plus petit diamètre 64 correspondant à la position intermédiaire, délimitée par le fond de l'alésage borgne 45 et dans laquelle le bouton poussoir 60 est sensiblement affleurant au corps 4, une zone de diamètre moyen 65 correspondant à la position de stockage dans laquelle le bouton poussoir 60 dépasse d'environ 2 à 3 mm du corps 4 (cf. fig. 1A et 1B) et une zone de plus grand diamètre 66 correspondant à la position d'activation dans laquelle le bouton poussoir 60 dépasse d'environ 8 à 10 mm du corps 4 (cf. fig. 2, 4 et 6).This push button 60 is guided axially in the blind bore 45 of the body 4. It has at its free end a marker 67, for example black, the body of the push button 60 being for example of red color. Thus, the armed position of the Igniter plug 1 is easily recognizable by the red color of the button pusher 60 which appears when it is released in the activation position. It includes in its non-free end an axial housing 63 for receiving the return element 62 against the bottom of the bore 45. This return element 62 is constituted compression spring or any other equivalent element symbolized on the Figures 1B and 2B by its axis features. In its middle part, this push button 60 comprises three peripheral zones of different diameters 64, 65, 66, intended for cooperate with the locking ball 61 to define the three positions of the organ of 6 lock, corresponding to three levels of 60 push button output 4. From top to bottom, with reference to FIGS. 1B and 2B, this button pusher 60 has an area of smaller diameter 64 corresponding to the position intermediate, delimited by the bottom of the blind bore 45 and in which the button pusher 60 is substantially flush with the body 4, an area of average diameter 65 corresponding to the storage position in which the push button 60 exceeds about 2 to 3 mm from body 4 (see Figs 1A and 1B) and a larger diameter area 66 corresponding to the activation position in which the push button 60 protrudes by about 8 to 10 mm from the body 4 (see Fig. 2, 4 and 6).

Le barillet 50 comporte un premier trou 54 latéral disposé en regard de l'orifice 46 du corps 4 et apte à recevoir la bille de blocage 61, quand il est en position passive, ce qui correspond à la position de stockage du bouton poussoir 60 (cf. fig. 1A et 1B). Ce barillet 50 comporte également un second trou 55 latéral plus profond que le premier 54, destiné à recevoir la bille de blocage 61 quand il est en position active, ce qui correspond à la position d'activation du bouton poussoir 60 (cf. fig. 2A et 2B). Les deux trous 54, 55 sont distants d'un angle inférieur à 90° et par exemple égal à 60°. Le passage de la position passive à la position active du barillet 50 est obtenu par un mouvement de rotation du corps 4 par rapport au barillet 50 autour de l'axe A, exercé manuellement directement sur le corps 4 ou par l'intermédiaire de la grenade à main 10 sur le barillet 50.The cylinder 50 has a first lateral hole 54 disposed opposite the orifice 46 of the body 4 and able to receive the locking ball 61, when it is in the passive position, this which corresponds to the storage position of the push button 60 (see Figs 1A and 1B). This barrel 50 also has a second hole 55 lateral deeper than the first 54, intended to receive the locking ball 61 when it is in the active position, which corresponds to the activation position of the pushbutton 60 (see Figs 2A and 2B). The two holes 54, 55 are separated by an angle less than 90 ° and for example equal to 60 °. The transition from the passive position to the active position of the barrel 50 is obtained by a rotational movement of the body 4 relative to the barrel 50 about the axis A, exerted manually directly on the body 4 or through the hand grenade 10 on the barrel 50.

Le barillet 50 du mécanisme de sécurité 5 comporte également un élément de rappel 56 coaxial à l'axe A et agencé pour solliciter ce barillet 50 vers sa position passive. Cet élément de rappel 56 est constitué d'un ressort à spirale enroulé autour du barillet 50, une extrémité de ce ressort étant fixée au corps 4 et l'autre extrémité au barillet 50. Sa mise en action sera expliquée plus loin en référence au fonctionnement du bouchon allumeur 1.The barrel 50 of the safety mechanism 5 also comprises a return element 56 coaxial with the axis A and arranged to solicit this cylinder 50 to its passive position. This return element 56 consists of a spiral spring wound around the barrel 50, one end of this spring being fixed to the body 4 and the other end to the barrel 50. Its activation will be explained later with reference to the functioning of the igniter plug 1.

Le bouchon allumeur 1 selon l'invention comporte un troisième mécanisme de sécurité appelé moyens d'interruption de l'allumage 7 associés aux moyens d'allumage 12. Ces moyens d'interruption de l'allumage 7 sont agencés pour être mobiles entre une position de stockage dans laquelle ils forment une barrière de feu destinée à empêcher le passage du feu des moyens d'allumage 12 vers la grenade à main 10 et une position d'allumage dans laquelle la barrière de feu s'efface pour autoriser le passage du feu des moyens d'allumage 12 vers la grenade à main 10 pour allumer la charge explosive 11 et la faire exploser.The igniter plug 1 according to the invention comprises a third mechanism of security called ignition interruption means 7 associated with the means 12. These means for interrupting the ignition 7 are arranged to be moving between a storage position in which they form a fire barrier intended to prevent the passage of fire from the ignition means 12 to the grenade at hand 10 and an ignition position in which the fire barrier clears for allow the passage of the fire from the ignition means 12 to the hand grenade 10 for turn on the explosive charge 11 and detonate it.

En référence plus particulièrement aux figures 5A et 5B, les moyens d'interruption de l'allumage 7 comportent un coulisseau 70 disposé transversalement dans le corps 4 du bouchon allumeur 1 selon un axe B perpendiculaire à l'axe A et pourvu d'une extrémité extérieure apte à coopérer avec le levier de déclenchement 20 et d'une extrémité intérieure couplée à un organe de rappel 71. Ce coulisseau 70 est maintenu en position rentrée correspondant à sa position de stockage par le levier de déclenchement 20 qui appuie directement sur l'extrémité extérieure du coulisseau 70, tant que ce levier de déclenchement 20 est en position sécurisée obtenue soit par la goupille de sécurité 3 qui verrouille à la fois la lame de rappel 22 et le levier de déclenchement 20, soit par pression manuelle de ce levier de déclenchement 20 contre la grenade à main 10 (fig. 5A). Ce coulisseau 70 se déplace selon l'axe B dans sa position sortie correspondant à sa position d'allumage sous l'action de son organe de rappel 71 dès que le levier de déclenchement 20 quitte la position sécurisée (fig. 5B). Ce coulisseau 70 est pourvu d'un écran anti-feu 72 formant la barrière de feu en position de sécurité et d'un alésage 73 libérant un passage de feu en position d'allumage. Dans cet exemple, l'entraxe E séparant l'écran anti-feu 72 et l'alésage 73 correspond sensiblement à la course C du coulisseau 70 entre ses deux positions, cette course C étant limitée par exemple par un épaulement 75 agencé pour buter contre une paroi 49 du corps 4 formant un arrêt en translation selon l'axe B. D'autres formes de réalisation équivalentes peuvent également convenir. Il est guidé au travers du corps 4 par un logement 47 transversal débouchant du côté du levier de déclenchement 20 et au travers du barillet 50 par un évidement 57 transversal. Le corps 4 comporte également une cavité distale 48 disposée dans le prolongement du logement 47 à l'opposé du levier de déclenchement 20 pour recevoir l'organe de rappel 73 constitué par exemple d'un ressort de compression. Pour des questions de montage, cette cavité distale 48 est délimitée par un capuchon 48' creux rapporté audit corps par vissage par exemple. L'évidement 57 prévu dans le barillet 50 est partiellement ouvert radialement pour autoriser la rotation relative entre le corps 4 et le barillet 50 en limitant le débattement angulaire à un angle α prédéfini inférieur à 90° et par exemple sensiblement égal à 60°. Des organes d'étanchéité, par exemple sous la forme d'un joint torique logé dans une rainure périphérique 74 entre le logement 47 et le coulisseau 70 et d'une rondelle 76 prévue entre la cavité 48 et le coulisseau 70, peuvent être prévus pour protéger une partie des composants de la chaíne pyrotechnique des agressions extérieures, notamment de l'humidité. Le coulisseau 70 est réalisé dans une matière résistante au feu choisie parmi le groupe comprenant au moins les métaux et les alliages métalliques, tels que par exemple l'acier, le laiton, le Zamac®, etc. Ce coulisseau 70 doit également avoir des dimensions suffisantes lui permettant de résister au feu et notamment une épaisseur adaptée au moins dans la zone de son écran anti-feu et définie en fonction de la matière choisie. Pour raisons économiques, on choisira de réaliser le coulisseau 70 en Zamac® avec une épaisseur égale à 4 mm par exemple, ces choix n'étant aucunement limitatifs. Dans l'exemple représenté, le coulisseau 70 est disposé entre les moyens d'allumage 12 et l'embout 51 c'est à dire en aval au moins des composants primaires inclus dans ces moyens d'allumage 12 et en amont uniquement des composants secondaires prévus à la fois dans l'embout 51 du bouchon allumeur 1 et dans la grenade à main 10. Cette disposition permet ainsi de garantir l'interruption de la chaíne pyrotechnique de la grenade à main 10 équipée de son bouchon allumeur 1 en position sécurisée ou de stockage.With particular reference to FIGS. 5A and 5B, the means for interrupting the ignition 7 comprise a slider 70 arranged transversely in the body 4 the igniter plug 1 along an axis B perpendicular to the axis A and provided with a outer end adapted to cooperate with the trip lever 20 and a inner end coupled to a return member 71. This slider 70 is maintained in the retracted position corresponding to its storage position by the lever of tripping 20 which bears directly on the outer end of the slider 70, as long as this trip lever 20 is in the secured position obtained either by the safety pin 3 which locks both the return blade 22 and the lever of trigger 20, or by manual pressure of the trigger lever 20 against hand grenade 10 (Fig. 5A). This slider 70 moves along the axis B in its output position corresponding to its ignition position under the action of its organ as soon as the release lever 20 leaves the safe position (FIG. 5B). This slide 70 is provided with an anti-fire screen 72 forming the fire barrier in safety position and a bore 73 releasing a fire passage in position ignition. In this example, the spacing E between the fire screen 72 and the bore 73 corresponds substantially to the stroke C of the slider 70 between its two positions, this stroke C being limited for example by a shoulder 75 arranged to abut against a wall 49 of the body 4 forming a stop in translation along the axis B. Other equivalent embodiments may also be suitable. He is guided through of the body 4 by a transverse housing 47 opening on the side of the lever of trigger 20 and through the cylinder 50 by a recess 57 transverse. The body 4 also has a distal cavity 48 arranged in the extension of the housing 47 opposite the trigger lever 20 to receive the body of recall 73 consisting for example of a compression spring. For questions of assembly, this distal cavity 48 is delimited by a cap 48 'reported recess audit body by screwing for example. The recess 57 provided in the barrel 50 is partially open radially to allow relative rotation between the body 4 and the cylinder 50 by limiting the angular deflection to a predefined angle α less than 90 ° and for example substantially equal to 60 °. Sealing members, for example in the form of an O-ring housed in a peripheral groove 74 between the housing 47 and the slider 70 and a washer 76 provided between the cavity 48 and the slider 70 may be provided to protect a part of the components of the pyrotechnic chain of external aggressions, in particular of the humidity. The slider 70 is made of a fire resistant material selected from the group comprising at least metals and metal alloys, such as for example steel, brass, Zamac®, etc. This slider 70 must also have dimensions sufficient to withstand fire and in particular a thickness adapted at least in the area of its fire screen and defined according to the chosen subject. For economic reasons, it will be chosen to make the slider 70 into Zamac® with a thickness equal to 4 mm for example, these choices being in no way limiting. In the example shown, the slider 70 is disposed between the means ignition 12 and the tip 51 that is downstream at least of the primary components included in these ignition means 12 and upstream only components provided in both the tip 51 of the igniter plug 1 and in the Hand Grenade 10. This provision thus ensures the interruption of the pyrotechnic chain of the hand grenade 10 equipped with its lighter plug 1 in secure position or storage.

Le fonctionnement du bouchon allumeur 1 de l'invention est à présent décrit en référence aux figures.The operation of the igniter plug 1 of the invention is now described in reference to the figures.

En position sécurisée (cf. fig. 1A, 1B, 3A, 5A), la goupille de sécurité 3 logée dans le corps 4 du bouchon allumeur 1 verrouille la lame de rappel 22 associée au levier de déclenchement 20. Le barillet 50 du mécanisme de sécurité 5 est verrouillé en position passive par le bouton poussoir 60 empêchant le retrait de la goupille de sécurité 3 (fig. 3A). La bille de blocage 61 positionnée entre la zone de diamètre moyen 65 et le premier trou 54 solidarise le barillet 50 au corps 4 (fig. 1B). Le repère 67 de ce bouton poussoir 60 est visible et légèrement saillant sur le haut du corps 4 du bouchon allumeur 1. Le coulisseau 70 des moyens d'interruption de l'allumage 7 est verrouillé en position rentrée correspondant à sa position de stockage par le levier de déclenchement 20, l'écran anti-feu 72 étant centré sur l'axe A (fig. 5A) pour interrompre la chaíne pyrotechnique. Dans cette configuration, la grenade à main 10 équipée de son bouchon allumeur 1 est totalement sécurisée, ne pouvant en aucun cas être percutée même en cas de fausse manipulation ou de chute. De plus, l'écran anti-feu 72 empêche la mise à feu de la grenade à main 10 même en cas d'initiation intempestive des moyens d'allumage 12. In the secured position (see Fig. 1A, 1B, 3A, 5A), the safety pin 3 housed in the body 4 of the igniter cap 1 locks the return blade 22 associated with the lever of triggering 20. The barrel 50 of the safety mechanism 5 is locked in passive position by the push button 60 preventing the removal of the pin from security 3 (Fig. 3A). The locking ball 61 positioned between the diameter zone means 65 and the first hole 54 secures the cylinder 50 to the body 4 (Figure 1B). The landmark 67 of this push button 60 is visible and slightly protruding on the upper body 4 of the igniter plug 1. The slider 70 of the ignition interruption means 7 is locked in the retracted position corresponding to its storage position by the lever 20, the fire screen 72 being centered on the axis A (FIG 5A) for interrupt the pyrotechnic chain. In this configuration, the hand grenade 10 equipped with its lighter plug 1 is totally secure, can not under any circumstances to be struck even in case of false manipulation or fall. In addition, the fire screen 72 prevents the firing of the hand grenade 10 even in the case of initiation inadvertent ignition means 12.

Pour amener le bouchon allumeur 1 de sa position sécurisée illustrée aux figures 1A et 1B à la position percutée illustrée à la figure 6B, l'utilisateur de la grenade à main 10 doit effectuer plusieurs manipulations volontaires, réfléchies et chronologiques.To bring the igniter plug 1 of its secure position illustrated in FIGS. 1A and 1B at the impact position shown in Figure 6B, the user of the hand grenade 10 must perform several deliberate, thoughtful and chronological manipulations.

Il doit tout d'abord amener ce bouchon allumeur 1 en position armée illustrée aux figures 2A et 2B qui lui permettra d'enlever la goupille de sécurité 3 pour atteindre la position percutée. Pour ce faire, il doit déverrouiller le barillet 50 en appuyant sur le bouton poussoir 60 pour l'amener dans sa position intermédiaire, délimitée par le fond de l'alésage borgne 45. Dans cette position intermédiaire, la bille de blocage 61 recule dans son orifice 46 pour se loger dans l'espace libre ménagé entre la zone de plus petit diamètre 64 du bouton poussoir 60 et l'alésage borgne 45. Ainsi, la bille de blocage 61 sort du premier trou 54 libérant le barillet 50. L'utilisateur doit ensuite tourner le corps 4 par rapport au barillet 50, ou l'inverse par l'intermédiaire de la grenade à main 10, d'un angle α sensiblement égal à 60° pour amener le barillet 50 dans sa position active (fig. 3B), délimitée par l'évidement 57 prévu dans le barillet 50. En référence aux figures 3A et 5A, la flèche F montre le sens de rotation du barillet 50 par rapport au corps 4. Si le corps 4 est tourné par rapport au barillet 50, le sens de rotation est inversé. Pendant cette rotation relative, le bouton poussoir 60 reste dans sa position intermédiaire, la bille de blocage 61 empêchant sa remontée. Dès que la rotation est effectuée, le deuxième trou 55 du barillet 50 se place en regard de l'orifice 46 pour recevoir la bille de blocage 61 qui le verrouille dans sa position active. Ce deuxième trou 55 étant plus profond que le premier 54, la bille de blocage 61 y pénètre davantage autorisant la remontée automatique du bouton poussoir 60 dans sa position d'activation sous l'action de son élément de rappel 62, la bille de blocage 61 étant positionnée entre la zone de plus grand diamètre 66 et ce trou 55. Dans cette position, le repère 67 du bouton poussoir 60 dépasse très nettement du haut du corps 4 indiquant que le bouchon allumeur 1 est en position armée (cf. fig. 2A, 2B, 4, 6B). It must first bring this lighter plug 1 in the illustrated armed position to 2A and 2B which will allow it to remove the safety pin 3 to reach the percussive position. To do this, he must unlock the cylinder 50 by pressing the push button 60 to bring it into its intermediate position, delimited by the bottom of the blind bore 45. In this intermediate position, the locking ball 61 back in its hole 46 to lodge in the free space between the area of smaller diameter 64 of the push button 60 and the blind bore 45. Thus, the ball of blocking 61 out of the first hole 54 releasing the barrel 50. The user must then turn the body 4 relative to the barrel 50, or vice versa via the hand grenade 10, an angle α substantially equal to 60 ° to bring the barrel 50 in its active position (FIG 3B), delimited by the recess 57 provided in the barrel 50. With reference to FIGS. 3A and 5A, the arrow F shows the direction of rotation of the barrel 50 relative to the body 4. If the body 4 is rotated relative to the cylinder 50, the direction of rotation is reversed. During this relative rotation, the push button 60 remains in its intermediate position, the locking ball 61 preventing its ascent. As soon as the rotation is made, the second hole 55 of the barrel 50 is placed in view of the orifice 46 to receive the locking ball 61 which locks in its active position. This second hole 55 being deeper than the first hole 54, the ball of blocking 61 penetrates further allowing the automatic raising of the button push 60 in its activation position under the action of its return element 62, the locking ball 61 being positioned between the larger diameter zone 66 and this hole 55. In this position, the marker 67 of the push button 60 exceeds very clearly from the upper body 4 indicating that the igniter cap 1 is in position army (see Fig. 2A, 2B, 4, 6B).

Si l'utilisateur ne tourne pas le barillet 50 suffisamment, soit d'une course angulaire inférieure à l'angle α par exemple de 60°, la bille de blocage 61 ne peut pas se loger dans le deuxième trou 55 du barillet 50 et bloquer ce dernier dans sa position active. De ce fait, le barillet 50 revient automatiquement dans sa position passive sous l'effet de son ressort à spirale 56. Simultanément, le bouton poussoir 60 ne peut pas se déplacer dans sa position d'activation et revient alors dans sa position de stockage replaçant le bouchon allumeur 1 en position sécurisée (cf. fig. 1A, 1B, 6A).If the user does not turn the barrel 50 sufficiently, either of an angular stroke less than the angle α for example of 60 °, the locking ball 61 can not lodge in the second hole 55 of the cylinder 50 and block the latter in its active position. As a result, the barrel 50 automatically returns to its passive position under the effect from its spiral spring 56. At the same time, the push button 60 can not be move to its activation position and then returns to its storage position replacing the ignition plug 1 in the secure position (see Fig. 1A, 1B, 6A).

Quand le bouchon allumeur 1 est en position armée telle qu'illustrée par les figures 2A, 2B, l'utilisateur peut soit continuer le processus, soit revenir en position sécurisée comme aux figures 1A, 1B en enfonçant le bouton poussoir 60 pour autoriser le retour automatique du barillet 50 en position passive. Pour continuer le processus, il doit retirer la goupille de sécurité 3 par l'anneau de préhension 33 à l'aide d'une main tout en maintenant le levier de déclenchement 20 contre la grenade à main 10 avec l'autre main. Dans cette position à mi-chemin entre la position armée et la position percutée, le coulisseau 70 est toujours rentré garantissant l'interruption de la chaíne pyrotechnique.When the igniter plug 1 is in the armed position as illustrated by the figures 2A, 2B, the user can either continue the process or return to the secure position as in FIGS. 1A, 1B by pressing the pushbutton 60 to allow the automatic return of the barrel 50 in the passive position. To continue the process, he must remove the safety pin 3 by the gripping ring 33 with one hand while holding the trigger lever 20 against the hand grenade 10 with the other hand. In this position halfway between the armed position and the position impacted, the slider 70 is always returned guaranteeing the interruption of the chain pyrotechnic.

Tant que l'utilisateur n'a pas lâché le levier de déclenchement 20, il peut revenir en arrière et replacer le bouchon allumeur 1 en position sécurisée, même après avoir retiré et jeté la goupille de sécurité 3. Il lui suffit pour cela d'enfoncer le bouton poussoir 60 pour libérer le barillet 50 lui permettant de revenir automatiquement dans sa position passive sous l'action de son ressort à spirale 56. Ainsi, si l'utilisateur lâche le levier de déclenchement 20, le percuteur 2 prévu sur la lame de rappel 22 ne pourra pas percuter l'amorce de tête des moyens d'allumage 12, cette lame de rappel 22 étant arrêtée dans son mouvement par deux butées 58, 58' mécaniques successives prévues en partie supérieure du barillet 50. Donc même, si la libération du levier de déclenchement 20 autorise le déplacement du coulisseau 70 en position d'allumage, le bouchon allumeur 1 et la grenade à main 10 restent sécurisés puisque les moyens d'allumage 12 ne peuvent pas être initiés (cf. fig. 6A). Cette réversibilité permet à l'utilisateur de replacer son bouchon allumeur 1 en position sécurisée (fig. 1A, 1B) en repositionnant le levier de déclenchement 20 et la lame de rappel 22 en position inerte, provoquant la rentrée du coulisseau 70 en position de stockage, et en verrouillant cette position par une goupille de sécurité 3.As long as the user has not released the trip lever 20, he can return to back and replace the igniter plug 1 in a secure position, even after removed and discarded the safety pin 3. All he has to do is press the button push 60 to release the cylinder 50 allowing it to automatically return to its passive position under the action of its spiral spring 56. Thus, if the user loose the trip lever 20, the striker 2 provided on the return blade 22 does not will not be able to hit the head start of the ignition means 12, this reminder blade 22 being stopped in its movement by two stops 58, 58 'successive mechanical provided in the upper part of the cylinder 50. So even if the release of the lever of triggering 20 allows the displacement of the slider 70 in the ignition position, the igniter cap 1 and the hand grenade 10 remain secure since the means 12 can not be initiated (see Fig. 6A). This reversibility allows the user to replace its ignition plug 1 in the secure position (FIG 1A, 1B) in repositioning the release lever 20 and the return blade 22 in position inert, causing retraction of the slider 70 in the storage position, and locking this position by a safety pin 3.

A partir de la position armée, si l'utilisateur souhaite poursuivre le processus et passer en position percutée, il doit lâcher le levier de déclenchement 20 et lancer la grenade à main 10 hors de sa portée qui va exploser dans un laps de temps prédéterminé. En lâchant le levier de déclenchement 20, la lame de rappel 22 pivote autour de son axe 41 sous l'action de son ressort hélicoïdal jusqu'à frapper l'amorce de tête des moyens d'allumage 12 à l'aide de son percuteur 2 (cf. fig. 6B). Dans sa rotation, elle entraíne le levier de déclenchement 20 qui pivote autour de son axe 40. Simultanément, le levier de déclenchement 20 libère le coulisseau 70 qui translate automatiquement en position sortie correspondant à sa position d'allumage sous l'action de son organe ressort 71 d'une course C pour présenter son alésage 73 sensiblement dans l'axe A autorisant ainsi le passage du feu des moyens d'allumage 12 vers la grenade à main 10 générant sa mise à feu. Dans sa translation, le coulisseau 70 contribue au pivotement du levier de déclenchement 20.From the armed position, if the user wishes to continue the process and move in the impacted position, he must let go of the release lever 20 and throw the grenade 10 out of range that will explode within a predetermined period of time. In releasing the release lever 20, the return blade 22 pivots about its axis 41 under the action of its helical spring until hitting the head primer means ignition 12 with its striker 2 (see Fig. 6B). In her rotation, she coaches the trip lever 20 which pivots about its axis 40. Simultaneously, the trigger lever 20 releases the slide 70 which automatically translates into output position corresponding to its ignition position under the action of its organ spring 71 of a stroke C to present its bore 73 substantially in the axis A thus allowing the passage of the fire from the ignition means 12 to the hand grenade 10 generating his firing. In its translation, the slider 70 contributes to the pivoting of the trip lever 20.

On constate de cette description que l'armement d'une grenade à main 10 au moyen du bouchon allumeur 1 selon l'invention devient un acte totalement réfléchi et volontaire et ne peut s'opérer inopinément. En effet, sa mise à feu ne peut être initiée que par la combinaison de deux évènements indépendants : le premier événement étant la rotation du barillet 50 après enfoncement du bouton poussoir 60, et le second évènement étant le relâchement du levier de déclenchement 20 après retrait de la goupille de sécurité 3. De plus, ce bouchon allumeur 1 assurant l'interruption de la chaíne pyrotechnique, permet de répondre parfaitement aux normes en vigueur. It can be seen from this description that the arming of a hand grenade 10 by means of of the igniter plug 1 according to the invention becomes a totally thought-out act and voluntary and can not operate unexpectedly. Indeed, its firing can not be initiated than by the combination of two independent events: the first event being the rotation of the barrel 50 after depression of the push button 60, and the second event being the release of the trip lever 20 after removal of the safety pin 3. In addition, this igniter plug 1 ensuring the interruption of the pyrotechnic chain, allows to meet perfectly the standards in force.

Enfin, le bouchon allumeur 1 selon l'invention est conçu pour être facilement réversible tant que l'utilisateur n'a pas lâché le levier de déclenchement 20, pour remettre la grenade à main 10 équipée de son bouchon allumeur 1 en position totalement sécurisée. De plus, la conception de ce bouchon allumeur 1 présente l'avantage d'être simple, fiable et économique.Finally, the igniter plug 1 according to the invention is designed to be easily reversible until the user has released the release lever 20, for put the hand grenade 10 equipped with its lighter plug 1 in position totally secure. In addition, the design of this igniter plug 1 presents the advantage of being simple, reliable and economical.

La présente invention n'est pas limitée à l'exemple de réalisation décrit mais s'étend à toute modification et variante évidentes pour un homme du métier tout en restant dans l'étendue de la protection définie dans les revendications annexées.The present invention is not limited to the embodiment described but extends to any modification and variation obvious to a person skilled in the art while remaining within the scope of protection defined in the appended claims.

Claims (13)

Bouchon allumeur (1) pour grenade à main (10) comportant au moins un corps (4) creux d'axe A, un levier de déclenchement (20) articulé par rapport au corps (4) et sollicité par au moins une lame de rappel (22) entre une position sécurisée et une position percutée, une goupille de sécurité (3) couplée au levier de déclenchement (20) pour le verrouiller dans la position sécurisée et au moins un percuteur associé à ladite lame de rappel (22), des moyens d'allumage (12) constitués au moins de composants dits primaires et des moyens d'interruption de l'allumage (7) agencés pour être mobiles entre une position de stockage dans laquelle ils forment une barrière de feu destinée à empêcher le passage du feu des moyens d'allumage (12) vers ladite grenade à main (10), cette position de stockage étant maintenue par ledit levier de déclenchement (20) tant qu'il est en position sécurisée, et une position d'allumage dans laquelle ladite barrière de feu s'efface pour autoriser le passage du feu des moyens d'allumage (12) vers ladite grenade à main (10) en vue de son explosion, cette position d'allumage étant sollicitée par au moins un organe de rappel (71) lorsque ledit levier de déclenchement (20) quitte sa position sécurisée, caractérisé en ce que lesdits moyens d'interruption de l'allumage (7) comportent au moins un coulisseau (70) mobile transversalement dans un logement (47) transversal dudit corps (4), ce coulisseau (70) étant pourvu au moins d'un écran anti-feu (72) formant ladite barrière de feu en position de stockage, d'un alésage (73) libérant un passage de feu en position d'allumage et d'une extrémité extérieure saillante coopérant avec ledit levier de déclenchement (20), et en ce que ledit corps (4) comporte une cavité (48) distale disposée dans le prolongement dudit logement (47) à l'opposé du levier de déclenchement (20) et apte à recevoir ledit organe de rappel (71) coopérant avec l'extrémité intérieure dudit coulisseau (70). Ignition cap (1) for hand grenade (10) having at least one body (4) hollow axis A, a release lever (20) articulated relative to the body (4) and biased by at least one return blade (22) between a secure position and an impacted position, a safety pin (3) coupled to the release lever (20) to lock it in the secured position and at least one striker associated with said return blade (22), ignition means (12) consisting of at least so-called primary components and ignition interruption means (7) arranged to be movable between a storage position in which they form a fire barrier to prevent the passage of the ignition means (12) to said hand grenade (10), said storage position being maintained by said release lever (20) as long as it is in a secure position, and an ignition position in which said fire barrier fades for autori the passage of the fire from the ignition means (12) towards said hand grenade (10) with a view to its explosion, this ignition position being solicited by at least one return member (71) when said tripping lever ( 20) leaves its secure position, characterized in that said ignition interruption means (7) comprise at least one slider (70) movable transversely in a housing (47) transverse of said body (4), said slider (70). ) being provided with at least one fire screen (72) forming said fire barrier in the storage position, a bore (73) releasing a fire passage in the ignition position and a cooperating projecting outer end with said release lever (20), and in that said body (4) has a distal cavity (48) disposed in line with said housing (47) opposite the trigger lever (20) and adapted to receive said return member (71) co-operating with the inner end of said orlisseau (70). Bouchon allumeur selon la revendication 1, caractérisé en ce que l'écran anti-feu (72) et l'alésage (73) sont distants d'un entraxe (E) sensiblement égal à la course (C) entre les deux positions dudit coulisseau (70).Ignition cap according to claim 1, characterized in that the fire screen (72) and the bore (73) are spaced apart by a distance (E) substantially equal to the stroke (C) between the two positions of said slide (70). Bouchon allumeur selon la revendication 2, caractérisé en ce que ledit coulisseau (70) comporte un épaulement (75) apte à coopérer avec une paroi (49) dudit corps (4) pour former une butée en translation limitant la course (C) dudit coulisseau (70).Ignition cap according to claim 2, characterized in that said slider (70) comprises a shoulder (75) adapted to cooperate with a wall (49) of said body (4) to form a stop in translation limiting the stroke (C) of said slider (70). Bouchon allumeur selon la revendication 1, caractérisé en ce que lesdits moyens d'interruption de l'allumage (7) comportent au moins un organe d'étanchéité (74, 76) disposé entre ledit corps (4) et ledit coulisseau (70).Igniter plug according to claim 1, characterized in that said ignition interruption means (7) comprise at least one sealing member (74, 76) disposed between said body (4) and said slider (70). Bouchon allumeur selon la revendication 1, caractérisé en ce que ledit coulisseau (70) est réalisé dans une matière résistante au feu choisie parmi le groupe comprenant au moins les métaux et les alliages métalliques.Ignition cap according to claim 1, characterized in that said slider (70) is made of a fire-resistant material selected from the group consisting of at least metals and metal alloys. Bouchon allumeur selon la revendication 1, caractérisé en ce que ledit coulisseau (70) est réalisé en partie ou en totalité en Zamac® .Ignition cap according to claim 1, characterized in that said slider (70) is made partly or wholly of Zamac®. Bouchon allumeur selon la revendication 1, caractérisé en ce que l'épaisseur du coulisseau (70) au moins dans la zone de son écran anti-feu est choisie pour résister au feu.Ignition cap according to claim 1, characterized in that the thickness of the slide (70) at least in the area of its fire screen is selected to withstand fire. Bouchon allumeur selon la revendication 1, caractérisé en ce que les moyens d'interruption de l'allumage (7) sont disposés en aval au moins des composants dits primaires desdits moyens d'allumage (12).Ignition plug according to claim 1, characterized in that the ignition interruption means (7) are arranged downstream at least of the so-called primary components of said ignition means (12). Bouchon allumeur selon la revendication 1, caractérisé en ce qu'il comporte un barillet (50) creux d'axe A logé à l'intérieur dudit corps (4) et pourvu en partie inférieure d'un embout (51) destiné à être fixé à ladite grenade à main (10), le corps (4) et le barillet (50) étant mobiles en rotation l'un par rapport à l'autre entre une position passive dans laquelle le barillet (50) empêche le retrait de la goupille de sécurité (3) et une position active dans laquelle le barillet (50) autorise le retrait de la goupille de sécurité (3).Ignition cap according to claim 1, characterized in that it comprises a hollow cylinder (50) of axis A housed inside said body (4) and provided in the lower part with a tip (51) intended to be fixed. said hand grenade (10), the body (4) and the barrel (50) being rotatable relative to each other between a passive position in which the barrel (50) prevents removal of the pin safety device (3) and an active position in which the cylinder (50) allows the removal of the safety pin (3). Bouchon allumeur selon la revendication 9, caractérisé en ce que ledit barillet (50) comporte un alésage (52) traversant d'axe A apte à recevoir lesdits moyens d'allumage (12) et un évidement (57) transversal disposé en regard dudit logement (47) traversé par ledit coulisseau (70), cet évidement (57) étant agencé pour autoriser et limiter la rotation relative dudit corps (4) par rapport audit barillet (50) d'un angle α prédéfini.Ignition cap according to claim 9, characterized in that said barrel (50) has a bore (52) passing through axis A adapted to receive said ignition means (12) and a transverse recess (57) arranged opposite said housing (47) traversed by said slider (70), this recess (57) being arranged to allow and limit the relative rotation of said body (4) relative to said barrel (50) by a predetermined angle α. Bouchon allumeur selon la revendication 10, caractérisé en ce que l'angle α prédéfini est inférieur à 90°.Igniter plug according to claim 10, characterized in that the predefined angle α is less than 90 °. Bouchon allumeur selon la revendication 9, caractérisé en ce que ledit barillet (50) comporte en partie supérieure au moins une butée d'arrêt (58, 58) apte à empêcher le percuteur (2) prévu sur ladite lame de rappel (22) de frapper lesdits moyens d'allumage (12) lorsque le barillet (50) est en position passive et au moins une encoche (59) apte à autoriser la percussion lorsque le barillet (50) est en position active.Ignition cap according to claim 9, characterized in that said cylinder (50) has in the upper part at least one stop (58, 58) adapted to prevent the striker (2) provided on said return blade (22) of knocking said ignition means (12) when the barrel (50) is in the passive position and at least one notch (59) adapted to allow percussion when the barrel (50) is in the active position. Grenade à main (10), caractérisée en ce qu'elle est équipée d'un bouchon allumeur (1) selon l'une quelconque des revendications 1 à 12.Hand Grenade (10), characterized in that it is equipped with an igniter plug (1) according to any one of Claims 1 to 12.
EP04360112A 2003-12-23 2004-12-21 Igniter head for a hand grenade and hand grenade provided with such an igniter head Withdrawn EP1548394A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0315267A FR2864220B1 (en) 2003-12-23 2003-12-23 IGNITION CAP FOR HAND GRENADE AND HAND GRANADE EQUIPPED WITH SUCH A PLUG
FR0315267 2003-12-23

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WO2012080998A1 (en) * 2010-12-12 2012-06-21 Israel Military Industries Ltd. Grenade mechanism

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FR3037644B1 (en) 2015-06-22 2017-07-21 Etienne Lacroix Tous Artifices S A IGNITER CAP WITHOUT PIN FOR GRANADA AND ANSI EQUIPPED GRENADA

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FR2696823A1 (en) * 1992-10-12 1994-04-15 Sae Alsetex Stopper with pyrotechnic circuit breaker esp. for hand grenade - has circuit breaker formed by fixed perforated plate and moving shutter controlled by spring after locking rod has been released
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012080998A1 (en) * 2010-12-12 2012-06-21 Israel Military Industries Ltd. Grenade mechanism
US8661979B2 (en) 2010-12-12 2014-03-04 Israel Military Industries Ltd. Grenade mechanism
AU2010365632B2 (en) * 2010-12-12 2016-04-21 Imi Systems Ltd. Grenade mechanism

Also Published As

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FR2864220A1 (en) 2005-06-24

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