WO2023218137A1 - Percussion pyrotechnic device for a pyrotechnic gas generator and associated coupling device for coupling between an airbag and a pyrotechnic gas generator - Google Patents

Percussion pyrotechnic device for a pyrotechnic gas generator and associated coupling device for coupling between an airbag and a pyrotechnic gas generator Download PDF

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Publication number
WO2023218137A1
WO2023218137A1 PCT/FR2023/000074 FR2023000074W WO2023218137A1 WO 2023218137 A1 WO2023218137 A1 WO 2023218137A1 FR 2023000074 W FR2023000074 W FR 2023000074W WO 2023218137 A1 WO2023218137 A1 WO 2023218137A1
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WO
WIPO (PCT)
Prior art keywords
pyrotechnic
percussion
coupling
coupling device
percussion device
Prior art date
Application number
PCT/FR2023/000074
Other languages
French (fr)
Inventor
Pierre-Yves Le Guen
Thomas THOUVENY
Annabelle LABRUNE
Maurice Kahn
Original Assignee
Hippy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hippy filed Critical Hippy
Publication of WO2023218137A1 publication Critical patent/WO2023218137A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/268—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous release of stored pressurised gas
    • B60R21/274—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous release of stored pressurised gas characterised by means to rupture or open the fluid source
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/015—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with shock-absorbing means
    • A41D13/018—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches with shock-absorbing means inflatable automatically
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
    • A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
    • A41D13/0506—Hip
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D2200/00—Components of garments
    • A41D2200/10—Belts

Definitions

  • TITLE Pyrotechnic percussion device, for a pyrotechnic gas generator, and associated coupling device for coupling between an inflatable bag and a pyrotechnic gas generator
  • the invention relates to a pyrotechnic percussion device for a pyrotechnic gas generator, as well as to a coupling device for coupling between an inflatable bag and a pyrotechnic gas generator.
  • the invention finds an application for an inflatable protection system, and in particular an individual inflatable protection system which provides an inflatable bag to inflate in the event of a fall, for cushioning purposes and therefore protection of the wearer while minimizing the risks. injury at the time of impact on the ground.
  • This invention is particularly of interest for the protection of elderly people whose constitution and bones become fragile as they age and possibly whose sense of balance diminishes, in particular with walking disorders and certain diseases such as Parkinson's. .
  • a favorite, and non-limiting, application concerns the protection of the hips and pelvis, to prevent fracture of the upper part of the femur, or neck of the femur.
  • a pyrotechnic gas generator comprises a gas cartridge containing a gas under pressure and having a mouth closed by a shutter element, and a pyrotechnic percussion device comprising a pyrotechnic charge which can be activated by an electrical signal, via a connection cable, during a predetermined condition (for example in the event of a fall detected by a suitable detector).
  • This pyrotechnic percussion device comprises a perforator which is moved to pierce the shutter element under the effect of the combustion gases generated by the pyrotechnic charge.
  • Document FR3055858 describes an example of an inflatable protection system which comprises a tubular "T" body having two opposite axial orifices, with a proximal axial orifice in which the mouth of the gas cartridge is mounted, and a distal axial orifice in on which the pyrotechnic percussion device is mounted, and a radial orifice which communicates with the inflatable bag.
  • tubular “T” body is poorly suited, in terms of bulk, to be worn by a person, for example within a belt placed around the waist.
  • the invention proposes to respond to this replacement problem, by proposing a pyrotechnic percussion device and an associated coupling device which make it possible to easily change the pyrotechnic gas generator after activation and inflation of the inflatable bag.
  • Another aim of the invention is to reduce the bulk of the inflatable protection system, and in particular of the coupling device and the pyrotechnic gas generator.
  • a pyrotechnic percussion device for a pyrotechnic gas generator, comprising a body internally housing a pyrotechnic charge and a perforator, said body being extended by a proximal tip delimiting an interior channel capable of being placed in communication with a gas cartridge, in which said proximal end piece has an outer circumferential section, framed by two seals, at least one radial exhaust hole being provided in said outer circumferential section between the two seals, the at least one hole d radial exhaust opening into said interior channel.
  • Such a solution is particularly advantageous because it will make it possible to reduce the bulk of the pyrotechnic percussion device, and therefore of the pyrotechnic gas generator as a whole, by offering a radial exhaust, between the two seals, through the hole or holes ( s) radial exhaust provided in a proximal endpiece adapted to be connected to the gas cartridge.
  • This solution thus makes it possible to reduce the length of the pyrotechnic gas generator, and to facilitate the replacement of this pyrotechnic gas generator.
  • the outer circumferential section has a peripheral groove in which the at least one radial exhaust hole is provided.
  • Such a peripheral groove makes it possible to recess the radial exhaust hole(s), and thus be able to use smaller seals to improve radial compactness.
  • the two seals are O-rings.
  • the proximal end piece internally has a coupling portion shaped for coupling to a mouth of the gas cartridge.
  • This coupling portion promotes tight mounting of the proximal endpiece on the mouth of the gas cartridge; this coupling portion can for example be shaped for coupling by screwing onto the mouth, or alternatively a bayonet coupling or any coupling shape.
  • the body is extended by a distal tip, opposite the proximal tip, this distal tip having a reversible locking element to allow reversible locking of the pyrotechnic percussion device on a complementary locking orifice of a device coupling for an inflatable bag.
  • the pyrotechnic percussion device can be easily locked onto the coupling device which forms an interfacing element (or intermediate element) between this pyrotechnic percussion device and the inflatable cushion; thus the assembly of the pyrotechnic percussion device is made easier and more reliable, because it will suffice to ensure this locking, concomitantly with the tight communication necessary for an escape of the pressurized gas towards the inflatable bag.
  • the reversible locking element is a rotation locking element comprising an oblong stop element adjacent to a peripheral groove, such as for example a quarter turn rotation locking element.
  • Such rotation locking consists of locking by a simple rotation which will abut complementary elements, such as for example by a rotation of 90 degrees (quarter turn) or any other suitable angle.
  • the reversible locking element is chosen from a bayonet locking element, a screw locking element, a snap-fit locking element.
  • the invention also relates to a pyrotechnic gas generator comprising a gas cartridge and a pyrotechnic percussion device according to the invention as described above, this gas cartridge containing a gas under pressure and having a mouth provided internally of a shutter element, and in which this mouth is mounted in the proximal tip of the pyrotechnic percussion device to be in communication with its internal channel, and the perforator is adapted to pierce the shutter element at the activation of the pyrotechnic charge to put the pressurized gas into communication with the internal channel for exhaust through the at least one radial exhaust hole.
  • the invention also relates to a coupling device for coupling between an inflatable bag and a pyrotechnic percussion device according to the invention as described above, this coupling device comprising:
  • connection interface having an interface opening shaped for a tight connection with an inflation valve of the airbag
  • connection interface a mounting sleeve secured to the connection interface, extending along a main axis and capable of internally receiving the outer circumferential section of the proximal end of the pyrotechnic percussion device; wherein the mounting socket comprises a cylindrical wall traversed by at least one outlet in communication with the interface opening.
  • this coupling device forms an interfacing element between the pyrotechnic percussion device (and therefore the pyrotechnic gas generator) and the inflatable cushion, and moreover this coupling device is complementary in its design to that of the pyrotechnic percussion device, because once these two devices are coupled, the radial exhaust hole(s) provided in the proximal end will be in sealed communication with the mounting socket and especially with the orifice(s). (s) outlet, so that the gas under pressure can escape from the gas cartridge towards the airbag.
  • this coupling device comprises a plate secured to the connection interface and spaced from the mounting socket along the main axis, said plate being provided with a complementary locking orifice centered on the main axis and capable of cooperating with a reversible locking element of the pyrotechnic percussion device to allow reversible locking of the pyrotechnic percussion device on said plate.
  • Such a plate with its complementary locking orifice, is particularly advantageous for locking the pyrotechnic percussion device on the coupling device, and therefore blocking translation in both directions of translation along the main axis (or longitudinal axis ), thus making it more reliable and easier to maintain and seal.
  • a slot is provided in the plate to open into the complementary locking orifice in order to allow the passage of at least one connection cable exiting the pyrotechnic percussion device.
  • Such a slot is thus very practical for passing at least one connection cable and thus facilitate assembly, without having to dismantle or partially disconnect this at least one connection cable.
  • the complementary locking orifice is delimited internally by an oblong periphery to be able to cooperate in locking with the reversible locking element which is a rotation locking element comprising an oblong stop element adjacent to a groove peripheral.
  • the complementary locking orifice is shaped to be able to cooperate in locking with the reversible locking element chosen from a bayonet locking element, a screw locking element, a snap-in locking element.
  • the plate is connected to the mounting socket by a chute which extends the mounting socket to the plate; which is advantageous for guiding the pyrotechnic percussion device towards the complementary locking orifice.
  • the at least one outlet orifice extends radially relative to the main axis; in other words it extends in a direction orthogonal to the main axis.
  • connection interface comprises a base having an upper face from which the mounting socket projects, and a lower face opposite the upper face and in which the interface opening in communication with the 'at least one outlet of the mounting socket.
  • the invention also relates to an inflatable protection system comprising a coupling device according to the invention, and an inflatable bag, in which the connecting interface of the coupling device is secured to an inflation valve of the airbag so that this inflation valve is in tight connection with the interface opening and with the at least one outlet orifice.
  • the inflatable protection system further comprises a pyrotechnic percussion device according to the invention, in which the outer circumferential section of the proximal end of the pyrotechnic percussion device is mounted in a sealed manner in the mounting socket of the coupling device, so that the at least one radial exhaust hole is in communication with the at least one outlet orifice and therefore with the inflation valve of the airbag.
  • the inflatable protection system, the distal tip of the pyrotechnic percussion device is held and locked on the plate of the coupling device for blocking in translation along the main axis, by cooperation between the element of reversible locking of said distal tip and the complementary locking orifice of said plate.
  • the pyrotechnic percussion device comprises at least one connection cable which exits from its distal tip and which is engaged through the slot made in the plate.
  • the inflatable protection system further comprises a gas cartridge containing a gas under pressure and having a mouth provided internally with a closing element, where this mouth is mounted in the proximal end of the pyrotechnic device of percussion to be in communication with its interior channel, and the perforator is adapted to pierce the shutter element upon activation of the pyrotechnic charge to put the pressurized gas into communication with the interior channel for exhaust through the at least one radial exhaust hole in order to inflate the airbag.
  • the invention finally relates to an individual safety device comprising an individual accessory capable of being worn on a wearer, this individual accessory supporting at least one inflatable protection system according to the invention.
  • this individual accessory is a belt capable of being worn around the wearer's waist, for protection of the wearer's pelvis or hips during inflation of the inflatable bag of the at least one inflatable protection system .
  • FIG 1 is a schematic view of a coupling device according to the invention, mounted on an inflatable bag, seen from the exterior side of the inflatable bag;
  • FIG 2 is a schematic view is a schematic view of the coupling device of Figure 1, mounted on the airbag, view from the inside of the airbag;
  • FIG 3 is a schematic view of a pyrotechnic gas generator according to the invention, comprising a gas cartridge coupled to a pyrotechnic percussion device according to the invention, with the coupling device of Figure 1 during a phase connection;
  • FIG 4 is a schematic view of the pyrotechnic gas generator of Figure 3 connected and locked to the coupling device;
  • FIG 5 is a schematic view of the pyrotechnic gas generator alone
  • FIG 6 is a schematic exploded view in axial section of the pyrotechnic gas generator
  • FIG 7 is a schematic view in assembly and in axial section of the pyrotechnic gas generator
  • FIG 8 is a schematic view of the pyrotechnic percussion device (without the gas cartridge) before its connection to the coupling device;
  • FIG 9 is another schematic view of the pyrotechnic percussion device before its connection to the coupling device
  • FIG 10 is another schematic view, from below this time, of the pyrotechnic percussion device before its connection to the coupling device;
  • FIG 11 is a schematic view of the pyrotechnic percussion device during its connection to the coupling device
  • FIG 12 is another schematic view of the pyrotechnic percussion device during its connection to the coupling device
  • FIG 13 is a schematic view of the pyrotechnic percussion device at the end of its connection and its locking on the coupling device;
  • FIG 14 is a schematic view of a personal safety device comprising a belt integrating two inflation systems according to the invention
  • FIG 15 is a schematic view of the personal safety device of Figure 14, without the pyrotechnic gas generators on the two inflation systems.
  • an inflatable protection system mainly comprises four elements:
  • an inflatable bag 1 (partially visible in Figures 1 and 2) having an inflation valve 10 for introducing gas under pressure in order to inflate said inflatable bag 1;
  • a gas cartridge 2 containing a gas under pressure and having a mouth 20 provided internally with a sealing element 21, in order to seal the evacuation of the gas under pressure;
  • a pyrotechnic percussion device 3 coupled to the gas cartridge 2 to together form a pyrotechnic gas generator 4;
  • the pyrotechnic percussion device 3 comprises a cylindrical body 30 internally housing a pyrotechnic charge 31 and a perforator 32 (shown schematically in Figures 6 and 7), this pyrotechnic charge 31 being connected to at least one connection cable 33 exiting the pyrotechnic device percussion 3 for a connection with an activation unit (not illustrated) adapted to activate the pyrotechnic charge 31 by an electrical signal, via the at least one connection cable 33, so that the perforator 32 can be moved to pierce the closing element 21 of the gas cartridge 2 under the effect of the combustion gases generated by the pyrotechnic charge 31.
  • This at least connection cable 33 ends in a connection member 330 (illustrated in Figure 4) plug or connector type, male or female.
  • This body 30 extends along a longitudinal axis a coupling on the mouth 20 of the gas cartridge 2. If the mouth 20 of the gas cartridge 2 is in the form of a threaded mouth (in other words with an external thread 22 shown schematically in Figure 6), then the coupling portion 36 has a thread adapted for coupling by screwing onto this threaded mouth. Thus, this interior channel 35 is able to be placed in communication with the gas cartridge 2, in other words the mouth 20 of the gas cartridge 2 is able to be mounted in the proximal end piece 34 to be in communication with its internal channel 35.
  • This proximal end piece 34 has an outer circumferential section 37, of cylindrical shape, framed by two seals 38 (which are here O-rings) and in which is formed a peripheral groove 39 in which at least one radial exhaust hole 40 is provided. ; this at least one radial exhaust hole 40 thus being provided between the two seals 38 to open into the internal channel 35.
  • the perforator 32 is located opposite the closing element 21 in order to be able to pierce the latter so that the gas under pressure is released. 'evacuates into the internal channel 35 and escapes radially through the at least one radial exhaust hole 40, between the two seals 38.
  • the at least one radial exhaust hole 40 comprises several radial exhaust holes 40 distributed over the circumference of the peripheral groove 39.
  • This body 30 is extended longitudinally by a distal tip 41, opposite the proximal tip 34, this distal tip 41 having a reversible locking element 42 to allow reversible locking of the pyrotechnic percussion device 3 on a complementary locking orifice 50 of the coupling device 5 described in more detail later.
  • the at least one connection cable 33 opens or exits from this distal tip 41.
  • the coupling device 5 comprises a connection interface 51 having an interface opening 52 (visible in Figures 2 and 10) shaped for a tight connection with the inflation valve 10 of the inflatable bag 1.
  • This connection interface 51 comprises a base 53 in the form of a plate intended to be housed in an integral and sealed manner in an opening of the inflation valve 10, for example between two walls or sheets of the inflatable bag 1 (in Figure 2 only one wall or sheet is illustrated) .
  • This base 53 has two opposite faces, which are:
  • the coupling device 5 further comprises two members which are integral with the connection interface 51 and which project from the upper face 530 of the base 53, namely:
  • this plate 55 spaced from the mounting socket 54 along the main axis, this plate 55 being provided with the complementary locking orifice 50 centered on the main axis and capable of cooperating with the reversible locking element 42 of the pyrotechnic percussion device 3 to allow reversible locking of the pyrotechnic percussion device 3 on this plate 55.
  • the mounting socket 54 comprises a cylindrical wall traversed by at least one outlet orifice 56 (visible in Figures 2, 8 and 10) in communication with the interface opening 52, and thus the inflation valve 10 is in connection sealed with the interface opening 52 and with this at least one outlet 56.
  • this at least one outlet 56 comprises a single outlet 56 in the form of a window.
  • this at least one outlet 56 is provided on the underside, on the side of the base 53, in order to put the interior of the mounting socket 54 in communication with the interface opening 52, and therefore in purpose to put the interior of the mounting socket 54 in communication with the inflation valve 10 of the inflatable bag 1.
  • the distal tip 41 is held and locked on the complementary locking orifice 50, by cooperation between the reversible locking element 42 and the complementary locking orifice 50, thus blocking the pyrotechnic percussion device 3 in translation along of the longitudinal axis X in both directions;
  • the outer circumferential section 37 of the proximal end piece 34 is mounted in a sealed manner in the mounting socket 54, with the two seals 38 which ensure this sealing by being fitted in an adjusted manner inside the mounting socket 54, and so that the at least one radial exhaust hole 40 is in communication with the at least one outlet orifice 56 and therefore with the inflation valve 10 of the inflatable bag 1.
  • peripheral groove 39 is positioned at the level of the at least one outlet orifice 56, so that the radial exhaust of the gas under pressure through of the at least one radial exhaust hole 40 extends towards the inflation valve 10 of the inflatable bag 1 to inflate the latter.
  • the plate 55 is connected to the mounting socket 54 by a channel 57 which extends the mounting socket 54 to the plate 55.
  • This channel 57 therefore projects from the upper face 530 of the base 53, and it serves to guide the pyrotechnic percussion device 3 (and therefore the pyrotechnic gas generator 4) during its coupling with the coupling device 5.
  • the chute 57 has the shape of a half-cylinder having the same diameter as the socket assembly 54.
  • a slot 58 is provided in the plate 55, for example in a median plane including the main axis, to open into the complementary locking orifice 50.
  • a slot 58 thus allows passage of at least one connection cable 33 emerging from the pyrotechnic percussion device 3, when coupling the pyrotechnic percussion device 3 to the coupling device 5, as illustrated in Figure 3.
  • connection member 330 which is at the end of the at least one connection cable 33, is too large to pass through the complementary locking orifice 50, then this slot 58 will make it possible to place the distal tip 41 through the complementary locking orifice 50 without having to disconnect the connection member 330 from the at least one connection cable 33.
  • the reversible locking element 42 provided on the distal tip 41 is a quarter-turn rotation locking element, and it comprises an oblong stop element 43 adjacent to a peripheral groove 44.
  • This oblong stop element 43 is substantially rectangular in shape, and it has two rectilinear longitudinal sides in its length and two arcuate lateral sides in its width; the arcuate lateral sides conforming to a circular contour, and preferably a circular contour of the same diameter as that of the body 30.
  • the complementary locking orifice 50 has a shape complementary to that of the oblong stop element 43 and is thus delimited internally by an oblong periphery to be able to cooperate in locking with the reversible locking element 42.
  • This oblong periphery is therefore of substantially rectangular in shape, and it has two rectilinear longitudinal edges in its length and two arcuate lateral edges in its width; the arcuate side edges conforming to a circular outline of substantially the same diameter as that of the arcuate side sides.
  • the oblong stop element 43 is aligned with the complementary locking orifice 50 (as illustrated in Figures 3, 8, 9, 11 and 12) to be able to pass through, then the pyrotechnic percussion device 3 is turned a quarter turn (90 degrees) in order to block it (as illustrated in Figures 4 and 13).
  • a boss 59 can be placed behind the plate 55 and present a concave bearing surface, having an arcuate shape complementary to that of the arcuate lateral sides of the oblong stop element 43, so that once locked by a quarter turn , one of these arcuate lateral sides is housed and wedged on this concave bearing surface of the boss 59 (as visible in Figure 13), thus making the holding in position and the locking of the pyrotechnic percussion device 3 more reliable.
  • the reversible locking element and the complementary locking orifice are shaped to together form a bayonet locking means, a screw locking means, or a snap-fit locking means.
  • such an inflatable protection system can be integrated into a belt 6 capable of being worn around the waist of the wearer, thus forming an individual safety device 7 for protection of the pelvis or hips of the wearer during inflation of the inflatable bag 1.
  • the inflatable bag 1 can be folded or rolled up to occupy a restricted space within the belt 6.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

The invention relates to a percussion pyrotechnic device (3) for a pyrotechnic gas generator (4), comprising a body (30) internally housing a pyrotechnic charge and a perforator, said body being extended by a proximal end piece (34) delimiting an interior channel able to be placed in communication with a gas cartridge (2), wherein said proximal end piece has an exterior circumferential section (37), flanked by two seals (38), at least one radial exhaust hole (40) being provided in said exterior circumferential section between the two seals, the at least one radial exhaust hole opening into said interior channel. The invention finds an application in an inflatable protection system, particularly a personal inflatable protection system having an airbag to be inflated in the event of a fall.

Description

DESCRIPTION DESCRIPTION
TITRE : Dispositif pyrotechnique de percussion, pour un générateur de gaz pyrotechnique, et dispositif d'accouplement associé pour un accouplement entre un coussin gonflable et un générateur de gaz pyrotechnique TITLE: Pyrotechnic percussion device, for a pyrotechnic gas generator, and associated coupling device for coupling between an inflatable bag and a pyrotechnic gas generator
[Domaine technique] [Technical area]
L'invention se rapporte à un dispositif pyrotechnique de percussion, pour un générateur de gaz pyrotechnique, ainsi qu'à un dispositif d'accouplement pour un accouplement entre un coussin gonflable et un générateur de gaz pyrotechnique. The invention relates to a pyrotechnic percussion device for a pyrotechnic gas generator, as well as to a coupling device for coupling between an inflatable bag and a pyrotechnic gas generator.
L'invention trouve une application pour un système de protection gonflable, et en particulier un système de protection gonflable individuelle qui propose un coussin gonflable à gonfler en cas de chute, à des fins d'amortissement et donc de protection du porteur en minimisant les risques de blessure au moment de l'impact au sol. The invention finds an application for an inflatable protection system, and in particular an individual inflatable protection system which provides an inflatable bag to inflate in the event of a fall, for cushioning purposes and therefore protection of the wearer while minimizing the risks. injury at the time of impact on the ground.
Cette invention présente notamment un intérêt pour la protection des personnes âgées dont la constitution et les os se fragilisent en vieillissant et éventuellement dont le sens de l'équilibre s'amenuise, en particulier avec des troubles de la marche et certaines maladies comme celle de Parkinson. This invention is particularly of interest for the protection of elderly people whose constitution and bones become fragile as they age and possibly whose sense of balance diminishes, in particular with walking disorders and certain diseases such as Parkinson's. .
Une application favorite, et non limitative, concerne la protection des hanches et du bassin, pour prévenir de la fracture de la partie supérieure du fémur, ou col du fémur. A favorite, and non-limiting, application concerns the protection of the hips and pelvis, to prevent fracture of the upper part of the femur, or neck of the femur.
[Etat de la technique] [State of the art]
De manière connue, un générateur de gaz pyrotechnique comprend une cartouche de gaz contenant un gaz sous pression et ayant une embouchure fermée par un élément d'obturation, et un dispositif pyrotechnique de percussion comprenant une charge pyrotechnique qui peut être activée par un signal électrique, via un câble de connexion, lors d'une condition prédéterminée (par exemple en cas de chute détectée par un détecteur adéquat). Ce dispositif pyrotechnique de percussion comprend un perforateur qui est déplacé pour percer l'élément d'obturation sous l'effet des gaz de combustion généré par la charge pyrotechnique. In known manner, a pyrotechnic gas generator comprises a gas cartridge containing a gas under pressure and having a mouth closed by a shutter element, and a pyrotechnic percussion device comprising a pyrotechnic charge which can be activated by an electrical signal, via a connection cable, during a predetermined condition (for example in the event of a fall detected by a suitable detector). This pyrotechnic percussion device comprises a perforator which is moved to pierce the shutter element under the effect of the combustion gases generated by the pyrotechnic charge.
Il est ainsi nécessaire d'accoupler de manière étanche le générateur de gaz pyrotechnique au coussin gonflable afin que le gaz sous pression contenu dans la cartouche de gaz s'échappe dans le coussin gonflable lorsque la charge pyrotechnique est activée. Le document FR3055858 décrit un exemple de système de protection gonflable qui comprend un corps tubulaire en « T » ayant deux orifices axiaux opposés, avec un orifice axial proximal dans lequel est montée l'embouchure de la cartouche de gaz, et un orifice axial distal dans lequel est monté le dispositif pyrotechnique de percussion, et un orifice radial qui communique avec le coussin gonflable. It is thus necessary to tightly couple the pyrotechnic gas generator to the inflatable bag so that the pressurized gas contained in the gas cartridge escapes into the inflatable bag when the pyrotechnic charge is activated. Document FR3055858 describes an example of an inflatable protection system which comprises a tubular "T" body having two opposite axial orifices, with a proximal axial orifice in which the mouth of the gas cartridge is mounted, and a distal axial orifice in on which the pyrotechnic percussion device is mounted, and a radial orifice which communicates with the inflatable bag.
Cependant, un tel système est peu pratique à utiliser, surtout lorsqu'on doit remplacer la cartouche de gaz et le dispositif pyrotechnique de percussion après un déclenchement, car il faut retirer l'un puis l'autre ; et par ailleurs le corps tubulaire en « T » est peu adapté, en terme d'encombrement, pour être porté par une personne, par exemple au sein d'une ceinture placée autour de la taille. However, such a system is impractical to use, especially when you have to replace the gas cartridge and the pyrotechnic percussion device after triggering, because you have to remove one then the other; and moreover the tubular “T” body is poorly suited, in terms of bulk, to be worn by a person, for example within a belt placed around the waist.
Le document US2022/0095709 propose quant à lui une intégration d'un générateur de gaz pyrotechnique dans une ceinture pour le déploiement d'un coussin gonflable qui a vocation à protéger les hanches et le bassin de son porteur. Cependant, la solution proposée dans ce document est peu adaptée pour un remplacement aisé après un déclenchement. Document US2022/0095709 proposes the integration of a pyrotechnic gas generator into a belt for the deployment of an inflatable bag which is intended to protect the hips and pelvis of its wearer. However, the solution proposed in this document is not very suitable for easy replacement after a trip.
[Résumé de l'invention] [Summary of the invention]
L'invention propose de répondre à ce problème de remplacement, en proposant un dispositif pyrotechnique de percussion et un dispositif d'accouplement associé qui permettent de changerfacilement le générateur de gaz pyrotechnique après activation et gonflement du coussin gonflable. The invention proposes to respond to this replacement problem, by proposing a pyrotechnic percussion device and an associated coupling device which make it possible to easily change the pyrotechnic gas generator after activation and inflation of the inflatable bag.
Un autre but de l'invention est de réduire l'encombrement du système de protection gonflable, et en particulier du dispositif d'accouplement et du générateur de gaz pyrotechnique. Another aim of the invention is to reduce the bulk of the inflatable protection system, and in particular of the coupling device and the pyrotechnic gas generator.
A cette fin, l'invention propose un dispositif pyrotechnique de percussion, pour un générateur de gaz pyrotechnique, comprenant un corps logeant intérieurement une charge pyrotechnique et un perforateur, ledit corps étant prolongé par un embout proximal délimitant un canal intérieur apte à être mis en communication avec une cartouche de gaz, dans lequel ledit embout proximal présente une section circonférentielle extérieure, encadrée par deux joints, au moins un trou d'échappement radial étant prévu dans ladite section circonférentielle extérieure entre les deux joints, l'au moins un trou d'échappement radial débouchant dans ledit canal intérieur. To this end, the invention proposes a pyrotechnic percussion device, for a pyrotechnic gas generator, comprising a body internally housing a pyrotechnic charge and a perforator, said body being extended by a proximal tip delimiting an interior channel capable of being placed in communication with a gas cartridge, in which said proximal end piece has an outer circumferential section, framed by two seals, at least one radial exhaust hole being provided in said outer circumferential section between the two seals, the at least one hole d radial exhaust opening into said interior channel.
Une telle solution est particulièrement avantageuse car elle va permettre de réduire l'encombrement du dispositif pyrotechnique de percussion, et donc du générateur de gaz pyrotechnique dans sa globalité, en proposant un échappement radial, entre les deux joints, au travers du ou des trou(s) d'échappement radial prévu(s) dans un embout proximal adapté pour être connecté à la cartouche de gaz. Cette solution permet ainsi de réduire la longueur du générateur de gaz pyrotechnique, et de faciliter le remplacement de ce générateur de gaz pyrotechnique. Such a solution is particularly advantageous because it will make it possible to reduce the bulk of the pyrotechnic percussion device, and therefore of the pyrotechnic gas generator as a whole, by offering a radial exhaust, between the two seals, through the hole or holes ( s) radial exhaust provided in a proximal endpiece adapted to be connected to the gas cartridge. This solution thus makes it possible to reduce the length of the pyrotechnic gas generator, and to facilitate the replacement of this pyrotechnic gas generator.
Selon une caractéristique, la section circonférentielle extérieure présente une rainure périphérique dans laquelle est prévu l'au moins un trou d'échappement radial. According to one characteristic, the outer circumferential section has a peripheral groove in which the at least one radial exhaust hole is provided.
Une telle rainure périphérique permet de mettre en retrait le ou les trou(s) d'échappement radial, et ainsi pouvoir utiliser des joints plus petits pour améliorer la compacité radiale. Such a peripheral groove makes it possible to recess the radial exhaust hole(s), and thus be able to use smaller seals to improve radial compactness.
Dans une réalisation particulière, les deux joints sont des joints toriques.In a particular embodiment, the two seals are O-rings.
Selon une possibilité, l'embout proximal présente intérieurement une portion d'accouplement conformée pour un accouplement sur une embouchure de la cartouche de gaz. According to one possibility, the proximal end piece internally has a coupling portion shaped for coupling to a mouth of the gas cartridge.
Cette portion d'accouplement favorise le montage étanche de l'embout proximal sur l'embouchure de la cartouche de gaz ; cette portion d'accouplement pouvant par exemple être conformée pour un accouplement par vissage sur l'embouchure, ou en variante un accouplement à baïonnette ou toute au forme d'accouplement. This coupling portion promotes tight mounting of the proximal endpiece on the mouth of the gas cartridge; this coupling portion can for example be shaped for coupling by screwing onto the mouth, or alternatively a bayonet coupling or any coupling shape.
Selon une autre possibilité, le corps est prolongé par un embout distal, opposé à l'embout proximal, cet embout distal présentant un élément de verrouillage réversible pour permettre un verrouillage réversible du dispositif pyrotechnique de percussion sur un orifice de verrouillage complémentaire d'un dispositif d'accouplement pour un coussin gonflable. According to another possibility, the body is extended by a distal tip, opposite the proximal tip, this distal tip having a reversible locking element to allow reversible locking of the pyrotechnic percussion device on a complementary locking orifice of a device coupling for an inflatable bag.
Ainsi, le dispositif pyrotechnique de percussion peut être verrouillé aisément sur le dispositif d'accouplement qui forme un élément d'interfaçage (ou élément intermédiaire) entre ce dispositif pyrotechnique de percussion et le coussin gonflable ; ainsi le montage du dispositif pyrotechnique de percussion est facilité et fiabilisé, car il suffira d'assurer ce verrouillage, concomitamment à la mise en communication étanche nécessaire pour un échappement du gaz sous pression en direction du coussin gonflable. Thus, the pyrotechnic percussion device can be easily locked onto the coupling device which forms an interfacing element (or intermediate element) between this pyrotechnic percussion device and the inflatable cushion; thus the assembly of the pyrotechnic percussion device is made easier and more reliable, because it will suffice to ensure this locking, concomitantly with the tight communication necessary for an escape of the pressurized gas towards the inflatable bag.
Selon une variante, l'élément de verrouillage réversible est un élément de verrouillage par rotation comprenant un élément de butée oblong adjacent à une gorge périphérique, comme par exemple un élément de verrouillage par rotation d'un quart de tour. According to a variant, the reversible locking element is a rotation locking element comprising an oblong stop element adjacent to a peripheral groove, such as for example a quarter turn rotation locking element.
Un tel verrouillage par rotation consiste à verrouiller par une simple rotation qui va mettre en butée des éléments complémentaires, comme par exemple par une rotation de 90 degrés (quart de tour) ou tout autre angle adapté. Selon d'autres variantes, l'élément de verrouillage réversible est choisi parmi un élément de verrouillage à baïonnette, un élément de verrouillage par vissage, un élément de verrouillage à encliquetage. Such rotation locking consists of locking by a simple rotation which will abut complementary elements, such as for example by a rotation of 90 degrees (quarter turn) or any other suitable angle. According to other variants, the reversible locking element is chosen from a bayonet locking element, a screw locking element, a snap-fit locking element.
L'invention se rapporte également à un générateur de gaz pyrotechnique comprenant une cartouche de gaz et un dispositif pyrotechnique de percussion conforme à l'invention tel que décrit ci-dessus, cette cartouche de gaz contenant un gaz sous pression et présentant une embouchure munie intérieurement d'un élément d'obturation, et dans lequel cette embouchure est montée dans l'embout proximal du dispositif pyrotechnique de percussion pour être en communication avec son canal intérieur, et le perforateur est adapté pour percer l'élément d'obturation à l'activation de la charge pyrotechnique pour mettre en communication le gaz sous pression avec le canal intérieur pour un échappement au travers de l'au moins un trou d'échappement radial. The invention also relates to a pyrotechnic gas generator comprising a gas cartridge and a pyrotechnic percussion device according to the invention as described above, this gas cartridge containing a gas under pressure and having a mouth provided internally of a shutter element, and in which this mouth is mounted in the proximal tip of the pyrotechnic percussion device to be in communication with its internal channel, and the perforator is adapted to pierce the shutter element at the activation of the pyrotechnic charge to put the pressurized gas into communication with the internal channel for exhaust through the at least one radial exhaust hole.
L'invention concerne aussi un dispositif d'accouplement pour un accouplement entre un coussin gonflable et un dispositif pyrotechnique de percussion conforme à l'invention tel que décrit ci-dessus, ce dispositif d'accouplement comprenant : The invention also relates to a coupling device for coupling between an inflatable bag and a pyrotechnic percussion device according to the invention as described above, this coupling device comprising:
- une interface de liaison présentant une ouverture d'interface conformée pour une liaison étanche avec une valve de gonflage du coussin gonflable, - a connection interface having an interface opening shaped for a tight connection with an inflation valve of the airbag,
- une douille de montage solidaire de l'interface de liaison, s'étendant selon un axe principal et apte à recevoir intérieurement la section circonférentielle extérieure de l'embout proximal du dispositif pyrotechnique de percussion ; dans lequel la douille de montage comprend une paroi cylindrique traversée par au moins un orifice de sortie en communication avec l'ouverture d'interface. - a mounting sleeve secured to the connection interface, extending along a main axis and capable of internally receiving the outer circumferential section of the proximal end of the pyrotechnic percussion device; wherein the mounting socket comprises a cylindrical wall traversed by at least one outlet in communication with the interface opening.
Autrement dit, ce dispositif d'accouplement forme un élément d'interfaçage entre le dispositif pyrotechnique de percussion (et donc le générateur de gaz pyrotechnique) et le coussin gonflable, et de surcroît ce dispositif d'accouplement est complémentaire dans sa conception de celle du dispositif pyrotechnique de percussion, car une fois ces deux dispositifs accouplés, le ou les trou(s) d'échappement radial prévu(s) dans l'embout proximal vont être en communication étanche avec la douille de montage et surtout avec le ou les orifice(s) de sortie, afin que le gaz sous pression puisse s'échapper de la cartouche de gaz en direction du coussin gonflable. In other words, this coupling device forms an interfacing element between the pyrotechnic percussion device (and therefore the pyrotechnic gas generator) and the inflatable cushion, and moreover this coupling device is complementary in its design to that of the pyrotechnic percussion device, because once these two devices are coupled, the radial exhaust hole(s) provided in the proximal end will be in sealed communication with the mounting socket and especially with the orifice(s). (s) outlet, so that the gas under pressure can escape from the gas cartridge towards the airbag.
Selon une autre possibilité, ce dispositif d'accouplement comprend un plateau solidaire de l'interface de liaison et espacé de la douille de montage le long de l'axe principal, ledit plateau étant muni d'un orifice de verrouillage complémentaire centré sur l'axe principal et apte à coopérer avec un élément de verrouillage réversible du dispositif pyrotechnique de percussion pour permettre un verrouillage réversible du dispositif pyrotechnique de percussion sur ledit plateau. According to another possibility, this coupling device comprises a plate secured to the connection interface and spaced from the mounting socket along the main axis, said plate being provided with a complementary locking orifice centered on the main axis and capable of cooperating with a reversible locking element of the pyrotechnic percussion device to allow reversible locking of the pyrotechnic percussion device on said plate.
Un tel plateau, avec son orifice de verrouillage complémentaire, est particulièrement avantageux pour un verrouillage du dispositif pyrotechnique de percussion sur le dispositif d'accouplement, et donc un blocage en translation dans les deux sens de translation selon l'axe principal (ou axe longitudinal), fiabilisant et facilitant ainsi le maintien et l'étanchéité. Such a plate, with its complementary locking orifice, is particularly advantageous for locking the pyrotechnic percussion device on the coupling device, and therefore blocking translation in both directions of translation along the main axis (or longitudinal axis ), thus making it more reliable and easier to maintain and seal.
Dans une réalisation particulière, une fente est ménagée dans le plateau pour déboucher dans l'orifice de verrouillage complémentaire afin de permettre un passage d'au moins un câble de connexion sortant du dispositif pyrotechnique de percussion. In a particular embodiment, a slot is provided in the plate to open into the complementary locking orifice in order to allow the passage of at least one connection cable exiting the pyrotechnic percussion device.
Une telle fente est ainsi très pratique pour faire passer l'au moins un câble de connexion et ainsi faciliter le montage, sans avoir à démonter ou déconnecter en partie cet au moins un câble de connexion. Such a slot is thus very practical for passing at least one connection cable and thus facilitate assembly, without having to dismantle or partially disconnect this at least one connection cable.
Dans un mode de réalisation particulier, l'orifice de verrouillage complémentaire est délimité intérieurement par un pourtour oblong pour pouvoir coopérer en verrouillage avec l'élément de verrouillage réversible qui est un élément de verrouillage par rotation comprenant un élément de butée oblong adjacent à une gorge périphérique. In a particular embodiment, the complementary locking orifice is delimited internally by an oblong periphery to be able to cooperate in locking with the reversible locking element which is a rotation locking element comprising an oblong stop element adjacent to a groove peripheral.
En variante, l'orifice de verrouillage complémentaire est conformé pour pouvoir coopérer en verrouillage avec l'élément de verrouillage réversible choisi parmi un élément de verrouillage à baïonnette, un élément de verrouillage par vissage, un élément de verrouillage à encliquetage. Alternatively, the complementary locking orifice is shaped to be able to cooperate in locking with the reversible locking element chosen from a bayonet locking element, a screw locking element, a snap-in locking element.
Avantageusement, le plateau est relié à la douille de montage par une goulotte qui prolonge la douille de montage jusqu'au plateau ; ce qui est avantageux pour guider le dispositif pyrotechnique de percussion en direction de l'orifice de verrouillage complémentaire. Advantageously, the plate is connected to the mounting socket by a chute which extends the mounting socket to the plate; which is advantageous for guiding the pyrotechnic percussion device towards the complementary locking orifice.
Selon une possibilité, l'au moins un orifice de sortie s'étend radialement par rapport à l'axe principal ; autrement dit il s'étend selon une direction orthogonale à l'axe principal. According to one possibility, the at least one outlet orifice extends radially relative to the main axis; in other words it extends in a direction orthogonal to the main axis.
Selon une autre possibilité, l'interface de liaison comprend une embase présentant une face supérieure de laquelle fait saillie la douille de montage, et une face inférieure opposée à la face supérieure et dans laquelle est prévue l'ouverture d'interface en communication avec l'au moins un orifice de sortie de la douille de montage. L'invention se rapporte également à un système de protection gonflable comprenant un dispositif d'accouplement selon l'invention, et un coussin gonflable, dans lequel l'interface de liaison du dispositif d'accouplement est solidarisée sur une valve de gonflage du coussin gonflable de sorte que cette valve de gonflage est en liaison étanche avec l'ouverture d'interface et avec l'au moins un orifice de sortie. According to another possibility, the connection interface comprises a base having an upper face from which the mounting socket projects, and a lower face opposite the upper face and in which the interface opening in communication with the 'at least one outlet of the mounting socket. The invention also relates to an inflatable protection system comprising a coupling device according to the invention, and an inflatable bag, in which the connecting interface of the coupling device is secured to an inflation valve of the airbag so that this inflation valve is in tight connection with the interface opening and with the at least one outlet orifice.
Selon une caractéristique, le système de protection gonflable comprend en outre un dispositif pyrotechnique de percussion conforme à l'invention, dans lequel la section circonférentielle extérieure de l'embout proximal du dispositif pyrotechnique de percussion est montée de manière étanche dans la douille de montage du dispositif d'accouplement, de sorte que l'au moins un trou d'échappement radial est en communication avec l'au moins un orifice de sortie et donc avec la valve de gonflage du coussin gonflable. According to one characteristic, the inflatable protection system further comprises a pyrotechnic percussion device according to the invention, in which the outer circumferential section of the proximal end of the pyrotechnic percussion device is mounted in a sealed manner in the mounting socket of the coupling device, so that the at least one radial exhaust hole is in communication with the at least one outlet orifice and therefore with the inflation valve of the airbag.
Selon une autre caractéristique, le système de protection gonflable, l'embout distal du dispositif pyrotechnique de percussion est maintenu et verrouillé sur le plateau du dispositif d'accouplement pour un blocage en translation selon l'axe principal, par coopération entre l'élément de verrouillage réversible dudit embout distal et l'orifice de verrouillage complémentaire dudit plateau. According to another characteristic, the inflatable protection system, the distal tip of the pyrotechnic percussion device is held and locked on the plate of the coupling device for blocking in translation along the main axis, by cooperation between the element of reversible locking of said distal tip and the complementary locking orifice of said plate.
Selon une autre caractéristique, le dispositif pyrotechnique de percussion comprend au moins un câble de connexion qui sort de son embout distal et qui est engagé au travers de la fente ménagée dans le plateau. According to another characteristic, the pyrotechnic percussion device comprises at least one connection cable which exits from its distal tip and which is engaged through the slot made in the plate.
Selon une autre caractéristique, le système de protection gonflable comprend en outre une cartouche de gaz contenant un gaz sous pression et présentant une embouchure munie intérieurement d'un élément d'obturation, où cette embouchure est montée dans l'embout proximal du dispositif pyrotechnique de percussion pour être en communication avec son canal intérieur, et le perforateur est adapté pour percer l'élément d'obturation à l'activation de la charge pyrotechnique pour mettre en communication le gaz sous pression avec le canal intérieur pour un échappement au travers de l'au moins un trou d'échappement radial afin de gonfler le coussin gonflable. According to another characteristic, the inflatable protection system further comprises a gas cartridge containing a gas under pressure and having a mouth provided internally with a closing element, where this mouth is mounted in the proximal end of the pyrotechnic device of percussion to be in communication with its interior channel, and the perforator is adapted to pierce the shutter element upon activation of the pyrotechnic charge to put the pressurized gas into communication with the interior channel for exhaust through the at least one radial exhaust hole in order to inflate the airbag.
L'invention concerne enfin un appareil de sécurité individuelle comprenant un accessoire individuel apte à être porté sur un porteur, cet accessoire individuel supportant au moins un système de protection gonflable selon l'invention. The invention finally relates to an individual safety device comprising an individual accessory capable of being worn on a wearer, this individual accessory supporting at least one inflatable protection system according to the invention.
Dans une application avantageuse, cet accessoire individuel est une ceinture apte à être portée autour de la taille du porteur, pour une protection du bassin ou des hanches du porteur lors d'un gonflage du coussin gonflable de l'au moins un système de protection gonflable. [Brève description des figures] In an advantageous application, this individual accessory is a belt capable of being worn around the wearer's waist, for protection of the wearer's pelvis or hips during inflation of the inflatable bag of the at least one inflatable protection system . [Brief description of the figures]
D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description détaillée ci-après, d'un exemple de mise en œuvre non limitatif, faite en référence aux figures annexées dans lesquelles : Other characteristics and advantages of the present invention will appear on reading the detailed description below, of a non-limiting example of implementation, made with reference to the appended figures in which:
[Fig 1] est une vue schématique d'un dispositif d'accouplement selon l'invention, monté sur un coussin gonflable, vue côté extérieur du coussin gonflable ; [Fig 1] is a schematic view of a coupling device according to the invention, mounted on an inflatable bag, seen from the exterior side of the inflatable bag;
[Fig 2] est une vue schématique est une vue schématique du dispositif d'accouplement de la Figure 1, monté sur le coussin gonflable, vue côté intérieur du coussin gonflable ; [Fig 2] is a schematic view is a schematic view of the coupling device of Figure 1, mounted on the airbag, view from the inside of the airbag;
[Fig 3] est une vue schématique d'un générateur de gaz pyrotechnique selon l'invention, comprenant une cartouche de gaz accouplée à un dispositif pyrotechnique de percussion selon l'invention, avec le dispositif d'accouplement de la Figure 1 pendant une phase de connexion ; [Fig 3] is a schematic view of a pyrotechnic gas generator according to the invention, comprising a gas cartridge coupled to a pyrotechnic percussion device according to the invention, with the coupling device of Figure 1 during a phase connection;
[Fig 4] est une vue schématique du générateur de gaz pyrotechnique de la Figure 3 connecté et verrouillé sur le dispositif d'accouplement ; [Fig 4] is a schematic view of the pyrotechnic gas generator of Figure 3 connected and locked to the coupling device;
[Fig 5] est une vue schématique du générateur de gaz pyrotechnique seul ; [Fig 5] is a schematic view of the pyrotechnic gas generator alone;
[Fig 6] est une vue schématique en éclatée et en coupe axiale du générateur de gaz pyrotechnique ; [Fig 6] is a schematic exploded view in axial section of the pyrotechnic gas generator;
[Fig 7] est une vue schématique en assemblée et en coupe axiale du générateur de gaz pyrotechnique ; [Fig 7] is a schematic view in assembly and in axial section of the pyrotechnic gas generator;
[Fig 8] est une vue schématique du dispositif pyrotechnique de percussion (sans la cartouche de gaz) avant sa connexion sur le dispositif d'accouplement ; [Fig 8] is a schematic view of the pyrotechnic percussion device (without the gas cartridge) before its connection to the coupling device;
[Fig 9] est une autre vue schématique du dispositif pyrotechnique de percussion avant sa connexion sur le dispositif d'accouplement ; [Fig 9] is another schematic view of the pyrotechnic percussion device before its connection to the coupling device;
[Fig 10] est une autre vue schématique, de dessous cette fois, du dispositif pyrotechnique de percussion avant sa connexion sur le dispositif d'accouplement ; [Fig 10] is another schematic view, from below this time, of the pyrotechnic percussion device before its connection to the coupling device;
[Fig 11] est une vue schématique du dispositif pyrotechnique de percussion pendant sa connexion sur le dispositif d'accouplement ; [Fig 11] is a schematic view of the pyrotechnic percussion device during its connection to the coupling device;
[Fig 12] est une autre vue schématique du dispositif pyrotechnique de percussion pendant sa connexion sur le dispositif d'accouplement ; [Fig 12] is another schematic view of the pyrotechnic percussion device during its connection to the coupling device;
[Fig 13] est une vue schématique du dispositif pyrotechnique de percussion à la fin de sa connexion et de son verrouillage sur le dispositif d'accouplement ; [Fig 13] is a schematic view of the pyrotechnic percussion device at the end of its connection and its locking on the coupling device;
[Fig 14] est une vue schématique d'un appareil de sécurité individuelle comprenant une ceinture intégrant deux systèmes de gonflage selon l'invention ; [Fig 15] est une vue schématique de l'appareil de sécurité individuelle de la Figure 14, sans les générateurs de gaz pyrotechnique sur les deux systèmes de gonflage. [Fig 14] is a schematic view of a personal safety device comprising a belt integrating two inflation systems according to the invention; [Fig 15] is a schematic view of the personal safety device of Figure 14, without the pyrotechnic gas generators on the two inflation systems.
[Description détaillée d'un ou plusieurs modes de réalisation de l'invention] [Detailed description of one or more embodiments of the invention]
En référence aux Figures, un système de protection gonflable selon un exemple de réalisation de l'invention, comprend principalement quatre éléments :With reference to the Figures, an inflatable protection system according to an exemplary embodiment of the invention mainly comprises four elements:
- un coussin gonflable 1 (visible partiellement sur les Figures 1 et 2) présentant une valve de gonflage 10 pour une introduction de gaz sous pression afin de gonfler ledit coussin gonflable 1 ; - an inflatable bag 1 (partially visible in Figures 1 and 2) having an inflation valve 10 for introducing gas under pressure in order to inflate said inflatable bag 1;
- une cartouche de gaz 2 contenant un gaz sous pression et présentant une embouchure 20 munie intérieurement d'un élément d'obturation 21, afin de sceller l'évacuation du gaz sous pression ; - a gas cartridge 2 containing a gas under pressure and having a mouth 20 provided internally with a sealing element 21, in order to seal the evacuation of the gas under pressure;
- un dispositif pyrotechnique de percussion 3 accouplé à la cartouche de gaz 2 pour former ensemble un générateur de gaz pyrotechnique 4 ; et - a pyrotechnic percussion device 3 coupled to the gas cartridge 2 to together form a pyrotechnic gas generator 4; And
- un dispositif d'accouplement 5 pour un accouplement entre le coussin gonflable 1 et le dispositif pyrotechnique de percussion 3. - a coupling device 5 for coupling between the inflatable bag 1 and the pyrotechnic percussion device 3.
Le dispositif pyrotechnique de percussion 3 comprend un corps 30 cylindrique logeant intérieurement une charge pyrotechnique 31 et un perforateur 32 (illustrés schématiquement sur les Figures 6 et 7), cette charge pyrotechnique 31 étant raccordée à au moins un câble de connexion 33 sortant du dispositif pyrotechnique de percussion 3 pour une liaison avec une unité d'activation (non illustrée) adaptée pour activer la charge pyrotechnique 31 par un signal électrique, via l'au moins un câble de connexion 33, de sorte que le perforateur 32 peut être déplacé pour percer l'élément d'obturation 21 de la cartouche de gaz 2 sous l'effet des gaz de combustion généré par la charge pyrotechnique 31. Cet au moins câble de connexion 33 se termine par un organe de connexion 330 (illustrée sur la Figure 4) de type prise ou connectique, mâle ou femelle. The pyrotechnic percussion device 3 comprises a cylindrical body 30 internally housing a pyrotechnic charge 31 and a perforator 32 (shown schematically in Figures 6 and 7), this pyrotechnic charge 31 being connected to at least one connection cable 33 exiting the pyrotechnic device percussion 3 for a connection with an activation unit (not illustrated) adapted to activate the pyrotechnic charge 31 by an electrical signal, via the at least one connection cable 33, so that the perforator 32 can be moved to pierce the closing element 21 of the gas cartridge 2 under the effect of the combustion gases generated by the pyrotechnic charge 31. This at least connection cable 33 ends in a connection member 330 (illustrated in Figure 4) plug or connector type, male or female.
Ce corps 30 s'étend le long d'un axe longitudinal X et il est prolongé longitudinalement par un embout proximal 34 délimitant un canal intérieur 35 et qui présente intérieurement une portion d'accouplement 36 (en communication avec le canal intérieur 35) conformée pour un accouplement sur l'embouchure 20 de la cartouche de gaz 2. Si l'embouchure 20 de la cartouche de gaz 2 se présente sous la forme d'une embouchure filetée (autrement dit avec un filetage externe 22 schématisé sur la Figure 6), alors la portion d'accouplement 36 présente un taraudage adapté pour un accouplement par vissage sur cette embouchure filetée. Ainsi, ce canal intérieur 35 est apte à être mis en communication avec la cartouche de gaz 2, autrement dit l'embouchure 20 de la cartouche de gaz 2 est apte à être montée dans l'embout proximal 34 pour être en communication avec son canal intérieur 35. This body 30 extends along a longitudinal axis a coupling on the mouth 20 of the gas cartridge 2. If the mouth 20 of the gas cartridge 2 is in the form of a threaded mouth (in other words with an external thread 22 shown schematically in Figure 6), then the coupling portion 36 has a thread adapted for coupling by screwing onto this threaded mouth. Thus, this interior channel 35 is able to be placed in communication with the gas cartridge 2, in other words the mouth 20 of the gas cartridge 2 is able to be mounted in the proximal end piece 34 to be in communication with its internal channel 35.
Cet embout proximal 34 présente une section circonférentielle extérieure 37, de forme cylindrique, encadrée par deux joints 38 (qui sont ici des joints toriques) et dans laquelle est ménagée une rainure périphérique 39 dans laquelle est prévu au moins un trou d'échappement radial 40 ; cet au moins un trou d'échappement radial 40 étant ainsi prévu entre les deux joints 38 pour déboucher dans le canal intérieur 35. This proximal end piece 34 has an outer circumferential section 37, of cylindrical shape, framed by two seals 38 (which are here O-rings) and in which is formed a peripheral groove 39 in which at least one radial exhaust hole 40 is provided. ; this at least one radial exhaust hole 40 thus being provided between the two seals 38 to open into the internal channel 35.
Ainsi, lorsque l'embout proximal 34 est accouplé sur l'embouchure 20 de la cartouche de gaz 2, le perforateur 32 se situe en face de l'élément d'obturation 21 afin de pouvoir percer ce dernier pour que le gaz sous pression s'évacue dans le canal intérieur 35 et s'échappe radialement au travers de l'au moins un trou d'échappement radial 40, entre les deux joints 38. Dans l'exemple illustré, l'au moins un trou d'échappement radial 40 comprend plusieurs trous d'échappement radial 40 réparties sur la circonférence de la rainure périphérique 39. Thus, when the proximal end piece 34 is coupled to the mouth 20 of the gas cartridge 2, the perforator 32 is located opposite the closing element 21 in order to be able to pierce the latter so that the gas under pressure is released. 'evacuates into the internal channel 35 and escapes radially through the at least one radial exhaust hole 40, between the two seals 38. In the example illustrated, the at least one radial exhaust hole 40 comprises several radial exhaust holes 40 distributed over the circumference of the peripheral groove 39.
Ce corps 30 est prolongé longitudinalement par un embout distal 41, opposé à l'embout proximal 34, cet embout distal 41 présentant un élément de verrouillage réversible 42 pour permettre un verrouillage réversible du dispositif pyrotechnique de percussion 3 sur un orifice de verrouillage complémentaire 50 du dispositif d'accouplement 5 décrit plus en détail ultérieurement. L'au moins un câble de connexion 33 débouche ou sort de cet embout distal 41. This body 30 is extended longitudinally by a distal tip 41, opposite the proximal tip 34, this distal tip 41 having a reversible locking element 42 to allow reversible locking of the pyrotechnic percussion device 3 on a complementary locking orifice 50 of the coupling device 5 described in more detail later. The at least one connection cable 33 opens or exits from this distal tip 41.
Le dispositif d'accouplement 5 comprend une interface de liaison 51 présentant une ouverture d'interface 52 (visible sur les Figures 2 et 10) conformée pour une liaison étanche avec la valve de gonflage 10 du coussin gonflable 1. Cette interface de liaison 51 comprend une embase 53 en forme de plaque destinée à être logée de manière solidaire et étanche dans une ouverture de la valve de gonflage 10, par exemple entre deux parois ou feuilles du coussin gonflable 1 (sur la Figure 2 une seule paroi ou feuille est illustrée). The coupling device 5 comprises a connection interface 51 having an interface opening 52 (visible in Figures 2 and 10) shaped for a tight connection with the inflation valve 10 of the inflatable bag 1. This connection interface 51 comprises a base 53 in the form of a plate intended to be housed in an integral and sealed manner in an opening of the inflation valve 10, for example between two walls or sheets of the inflatable bag 1 (in Figure 2 only one wall or sheet is illustrated) .
Cette embase 53 présente deux faces opposées, qui sont : This base 53 has two opposite faces, which are:
- une face supérieure 530 tournée vers l'extérieur du coussin gonflable 1 ; et - an upper face 530 facing the outside of the inflatable bag 1; And
- une face inférieure 531 tournée vers l'intérieur du coussin gonflable 1 et dans laquelle est prévue l'ouverture d'interface 52. - a lower face 531 facing the inside of the inflatable bag 1 and in which the interface opening 52 is provided.
Le dispositif d'accouplement 5 comprend en outre deux organes qui sont solidaires de l'interface de liaison 51 et qui font saillie de la face supérieure 530 de l'embase 53, à savoir : The coupling device 5 further comprises two members which are integral with the connection interface 51 and which project from the upper face 530 of the base 53, namely:
- une douille de montage 54 s'étendant selon un axe principal (qui en situation est confondu avec l'axe longitudinal X du dispositif pyrotechnique de percussion 3) et apte à recevoir intérieurement la section circonférentielle extérieure 37 de l'embout proximal 34 du dispositif pyrotechnique de percussion ; - a mounting socket 54 extending along a main axis (which in the situation is merged with the longitudinal axis
- un plateau 55 espacé de la douille de montage 54 le long de l'axe principal, ce plateau 55 étant muni de l'orifice de verrouillage complémentaire 50 centré sur l'axe principal et apte à coopérer avec l'élément de verrouillage réversible 42 du dispositif pyrotechnique de percussion 3 pour permettre un verrouillage réversible du dispositif pyrotechnique de percussion 3 sur ce plateau 55. - a plate 55 spaced from the mounting socket 54 along the main axis, this plate 55 being provided with the complementary locking orifice 50 centered on the main axis and capable of cooperating with the reversible locking element 42 of the pyrotechnic percussion device 3 to allow reversible locking of the pyrotechnic percussion device 3 on this plate 55.
La douille de montage 54 comprend une paroi cylindrique traversée par au moins un orifice de sortie 56 (visible sur les Figures 2, 8 et 10) en communication avec l'ouverture d'interface 52, et ainsi la valve de gonflage 10 est en liaison étanche avec l'ouverture d'interface 52 et avec cet au moins un orifice de sortie 56. Dans l'exemple illustré, cet au moins un orifice de sortie 56 comprend un unique orifice de sortie 56 en forme de fenêtre. The mounting socket 54 comprises a cylindrical wall traversed by at least one outlet orifice 56 (visible in Figures 2, 8 and 10) in communication with the interface opening 52, and thus the inflation valve 10 is in connection sealed with the interface opening 52 and with this at least one outlet 56. In the example illustrated, this at least one outlet 56 comprises a single outlet 56 in the form of a window.
Autrement dit, cet au moins un orifice de sortie 56 est ménagé sur le dessous, du côté de l'embase 53, afin mettre en communication l'intérieur de la douille de montage 54 avec l'ouverture d'interface 52, et donc en finalité mettre en communication l'intérieur de la douille de montage 54 avec la valve de gonflage 10 du coussin gonflable 1. In other words, this at least one outlet 56 is provided on the underside, on the side of the base 53, in order to put the interior of the mounting socket 54 in communication with the interface opening 52, and therefore in purpose to put the interior of the mounting socket 54 in communication with the inflation valve 10 of the inflatable bag 1.
La conformation de ce dispositif d'accouplement 5, dont la distance entre la douille de montage 54 et le plateau 55, est telle que lors de l'accouplement du dispositif pyrotechnique de percussion 3 (et donc du générateur de gaz pyrotechnique 4) sur le dispositif d'accouplement 5 : The conformation of this coupling device 5, the distance between the mounting sleeve 54 and the plate 55, is such that when coupling the pyrotechnic percussion device 3 (and therefore the pyrotechnic gas generator 4) on the coupling device 5:
- l'embout distal 41 est maintenu et verrouillé sur l'orifice de verrouillage complémentaire 50, par coopération entre l'élément de verrouillage réversible 42 et l'orifice de verrouillage complémentaire 50, bloquant ainsi en translation le dispositif pyrotechnique de percussion 3 le long de l'axe longitudinal X selon les deux sens ; et- the distal tip 41 is held and locked on the complementary locking orifice 50, by cooperation between the reversible locking element 42 and the complementary locking orifice 50, thus blocking the pyrotechnic percussion device 3 in translation along of the longitudinal axis X in both directions; And
- la section circonférentielle extérieure 37 de l'embout proximal 34 est montée de manière étanche dans la douille de montage 54, avec les deux joints 38 qui assurent cette étanchéité en étant montés de manière ajustée à l'intérieur de la douille de montage 54, et de sorte que l'au moins un trou d'échappement radial 40 est en communication avec l'au moins un orifice de sortie 56 et donc avec la valve de gonflage 10 du coussin gonflable 1. - the outer circumferential section 37 of the proximal end piece 34 is mounted in a sealed manner in the mounting socket 54, with the two seals 38 which ensure this sealing by being fitted in an adjusted manner inside the mounting socket 54, and so that the at least one radial exhaust hole 40 is in communication with the at least one outlet orifice 56 and therefore with the inflation valve 10 of the inflatable bag 1.
Ainsi, la rainure périphérique 39 se positionne au niveau de l'au moins un orifice de sortie 56, de sorte que l'échappement radial du gaz sous pression au travers de l'au moins un trou d'échappement radial 40 se prolonge en direction de la valve de gonflage 10 du coussin gonflable 1 pour gonfler ce dernier. Thus, the peripheral groove 39 is positioned at the level of the at least one outlet orifice 56, so that the radial exhaust of the gas under pressure through of the at least one radial exhaust hole 40 extends towards the inflation valve 10 of the inflatable bag 1 to inflate the latter.
De manière avantageuse, le plateau 55 est relié à la douille de montage 54 par une goulotte 57 qui prolonge la douille de montage 54 jusqu'au plateau 55. Cette goulotte 57 fait donc saillie de la face supérieure 530 de l'embase 53, et elle sert au guidage du dispositif pyrotechnique de percussion 3 (et donc du générateur de gaz pyrotechnique 4) lors de son accouplement avec le dispositif d'accouplement 5. La goulotte 57 présente une forme de demi-cylindre ayant le même diamètre que la douille de montage 54. Advantageously, the plate 55 is connected to the mounting socket 54 by a channel 57 which extends the mounting socket 54 to the plate 55. This channel 57 therefore projects from the upper face 530 of the base 53, and it serves to guide the pyrotechnic percussion device 3 (and therefore the pyrotechnic gas generator 4) during its coupling with the coupling device 5. The chute 57 has the shape of a half-cylinder having the same diameter as the socket assembly 54.
Par ailleurs, une fente 58 est ménagée dans le plateau 55, par exemple dans un plan médian incluant l'axe principal, pour déboucher dans l'orifice de verrouillage complémentaire 50. Une telle fente 58 permet ainsi un passage de l'au moins un câble de connexion 33 sortant du dispositif pyrotechnique de percussion 3, lors de l'accouplement du dispositif pyrotechnique de percussion 3 sur le dispositif d'accouplement 5, comme illustré sur la Figure 3. Furthermore, a slot 58 is provided in the plate 55, for example in a median plane including the main axis, to open into the complementary locking orifice 50. Such a slot 58 thus allows passage of at least one connection cable 33 emerging from the pyrotechnic percussion device 3, when coupling the pyrotechnic percussion device 3 to the coupling device 5, as illustrated in Figure 3.
En effet, si l'organe de connexion 330, qui est au bout de l'au moins un câble de connexion 33, est trop gros pour passer au travers de l'orifice de verrouillage complémentaire 50, alors cette fente 58 va permettre de placer l'embout distal 41 au travers de l'orifice de verrouillage complémentaire 50 sans avoir à débrancher l'organe de connexion 330 de l'au moins un câble de connexion 33. Indeed, if the connection member 330, which is at the end of the at least one connection cable 33, is too large to pass through the complementary locking orifice 50, then this slot 58 will make it possible to place the distal tip 41 through the complementary locking orifice 50 without having to disconnect the connection member 330 from the at least one connection cable 33.
Dans l'exemple illustré, l'élément de verrouillage réversible 42 prévu sur l'embout distal 41 est un élément de verrouillage par rotation d'un quart de tour, et il comprend un élément de butée oblong 43 adjacent à une gorge périphérique 44. In the example illustrated, the reversible locking element 42 provided on the distal tip 41 is a quarter-turn rotation locking element, and it comprises an oblong stop element 43 adjacent to a peripheral groove 44.
Cet élément de butée oblong 43 est de forme substantiellement rectangulaire, et il présente dans sa longueur deux côtés longitudinaux rectilignes et dans sa largeur deux côtés latéraux arqués ; les côtés latéraux arqués épousant un contour circulaire, et de préférence un contour circulaire de même diamètre que celui du corps 30. This oblong stop element 43 is substantially rectangular in shape, and it has two rectilinear longitudinal sides in its length and two arcuate lateral sides in its width; the arcuate lateral sides conforming to a circular contour, and preferably a circular contour of the same diameter as that of the body 30.
L'orifice de verrouillage complémentaire 50 est de forme complémentaire à celle de l'élément de butée oblong 43 et est ainsi délimité intérieurement par un pourtour oblong pour pouvoir coopérer en verrouillage avec l'élément de verrouillage réversible 42. Ce pourtour oblong est donc de forme substantiellement rectangulaire, et il présente dans sa longueur deux bords longitudinaux rectilignes et dans sa largeur deux bords latéraux arqués ; les bords latéraux arqués épousant un contour circulaire de sensiblement même diamètre que celui des côtés latéraux arqués. Ainsi, lors de l'accouplement du dispositif pyrotechnique de percussion 3 sur le dispositif d'accouplement 5, l'élément de butée oblong 43 est aligné avec l'orifice de verrouillage complémentaire 50 (comme illustré sur les Figures 3, 8, 9, 11 et 12) pour pouvoir passer au travers, puis le dispositif pyrotechnique de percussion 3 est tourné d'un quart de tour (90 degrés) afin de le bloquer (comme illustré sur les Figures 4 et 13). The complementary locking orifice 50 has a shape complementary to that of the oblong stop element 43 and is thus delimited internally by an oblong periphery to be able to cooperate in locking with the reversible locking element 42. This oblong periphery is therefore of substantially rectangular in shape, and it has two rectilinear longitudinal edges in its length and two arcuate lateral edges in its width; the arcuate side edges conforming to a circular outline of substantially the same diameter as that of the arcuate side sides. Thus, when coupling the pyrotechnic percussion device 3 to the coupling device 5, the oblong stop element 43 is aligned with the complementary locking orifice 50 (as illustrated in Figures 3, 8, 9, 11 and 12) to be able to pass through, then the pyrotechnic percussion device 3 is turned a quarter turn (90 degrees) in order to block it (as illustrated in Figures 4 and 13).
Un bossage 59 peut être placé derrière le plateau 55 et présenter une surface d'appui concave, ayant une forme arquée complémentaire à celle des côtés latéraux arqués de l'élément de butée oblong 43, de sorte qu'une fois verrouillé par quart de tour, l'un de ces côtés latéraux arqués se loge et se coince sur cette surface d'appui concave du bossage 59 (comme visible sur la Figure 13), fiabilisant ainsi le maintien en position et le verrouillage du dispositif pyrotechnique de percussion 3. A boss 59 can be placed behind the plate 55 and present a concave bearing surface, having an arcuate shape complementary to that of the arcuate lateral sides of the oblong stop element 43, so that once locked by a quarter turn , one of these arcuate lateral sides is housed and wedged on this concave bearing surface of the boss 59 (as visible in Figure 13), thus making the holding in position and the locking of the pyrotechnic percussion device 3 more reliable.
Dans des variantes non illustrées, l'élément de verrouillage réversible et l'orifice de verrouillage complémentaire sont conformés pour former ensemble un moyen de verrouillage à baïonnette, un moyen de verrouillage par vissage, ou un moyen de verrouillage à encliquetage. In variants not illustrated, the reversible locking element and the complementary locking orifice are shaped to together form a bayonet locking means, a screw locking means, or a snap-fit locking means.
En référence aux Figures 14 et 15, un tel système de protection gonflable peut être intégré à une ceinture 6 apte à être portée autour de la taille du porteur, formant ainsi un appareil de sécurité individuelle 7 pour une protection du bassin ou des hanches du porteur lors d'un gonflage du coussin gonflable 1. Le coussin gonflable 1 peut être plié ou enroulé pour occuper un espace restreint au sein de la ceinture 6. With reference to Figures 14 and 15, such an inflatable protection system can be integrated into a belt 6 capable of being worn around the waist of the wearer, thus forming an individual safety device 7 for protection of the pelvis or hips of the wearer during inflation of the inflatable bag 1. The inflatable bag 1 can be folded or rolled up to occupy a restricted space within the belt 6.
Dans cette application de protection du bassin ou des hanches, il est envisageable, comme dans l'exemple illustré, d'avoir deux tels systèmes de protection gonflable 1, à droite et à gauche. In this application for protecting the pelvis or hips, it is possible, as in the example illustrated, to have two such inflatable protection systems 1, on the right and on the left.

Claims

REVENDICATIONS
1. Dispositif pyrotechnique de percussion (3), pour un générateur de gaz pyrotechnique (4), comprenant un corps (30) logeant intérieurement une charge pyrotechnique (31) et un perforateur (32), ledit corps (30) étant prolongé par un embout proximal (34) délimitant un canal intérieur (35) apte à être mis en communication avec une cartouche de gaz (2), dans lequel ledit embout proximal (34) présente une section circonférentielle extérieure (37), encadrée par deux joints (38), au moins un trou d'échappement radial (40) étant prévu dans ladite section circonférentielle extérieure (37) entre les deux joints (38), l'au moins un trou d'échappement radial (40) débouchant dans ledit canal intérieur (35). 1. Pyrotechnic percussion device (3), for a pyrotechnic gas generator (4), comprising a body (30) internally housing a pyrotechnic charge (31) and a perforator (32), said body (30) being extended by a proximal end piece (34) delimiting an interior channel (35) capable of being placed in communication with a gas cartridge (2), in which said proximal end piece (34) has an outer circumferential section (37), framed by two seals (38 ), at least one radial exhaust hole (40) being provided in said outer circumferential section (37) between the two seals (38), the at least one radial exhaust hole (40) opening into said internal channel ( 35).
2. Dispositif pyrotechnique de percussion (3) selon la revendication 1, dans lequel la section circonférentielle extérieure (37) présente une rainure périphérique (39) dans laquelle est prévu l'au moins un trou d'échappement radial (40). 2. Pyrotechnic percussion device (3) according to claim 1, wherein the outer circumferential section (37) has a peripheral groove (39) in which the at least one radial exhaust hole (40) is provided.
3. Dispositif pyrotechnique de percussion (3) selon la revendication 1 ou 2, dans lequel l'embout proximal (34) présente intérieurement une portion d'accouplement (36) conformée pour un accouplement sur une embouchure (20) de la cartouche de gaz (2), par exemple un accouplement par vissage. 3. Pyrotechnic percussion device (3) according to claim 1 or 2, in which the proximal endpiece (34) internally has a coupling portion (36) shaped for coupling to a mouth (20) of the gas cartridge (2), for example a screw coupling.
4. Dispositif pyrotechnique de percussion (3) selon l'une quelconque des revendications 1 à 3, dans lequel le corps (30) est prolongé par un embout distal (41), opposé à l'embout proximal (34), ledit embout distal (41) présentant un élément de verrouillage réversible (42) pour permettre un verrouillage réversible du dispositif pyrotechnique de percussion (3) sur un orifice de verrouillage complémentaire (50) d'un dispositif d'accouplement (5) pour un coussin gonflable (1). 4. Pyrotechnic percussion device (3) according to any one of claims 1 to 3, in which the body (30) is extended by a distal tip (41), opposite the proximal tip (34), said distal tip (41) having a reversible locking element (42) to enable reversible locking of the pyrotechnic percussion device (3) on a complementary locking orifice (50) of a coupling device (5) for an inflatable bag (1 ).
5. Dispositif pyrotechnique de percussion (3) selon la revendication 4, dans lequel l'élément de verrouillage réversible (42) est un élément de verrouillage par rotation comprenant un élément de butée oblong (43) adjacent à une gorge périphérique (44), comme par exemple un élément de verrouillage par rotation d'un quart de tour. 5. Pyrotechnic percussion device (3) according to claim 4, in which the reversible locking element (42) is a rotational locking element comprising an oblong stop element (43) adjacent to a peripheral groove (44), such as for example a locking element by rotating a quarter turn.
6. Dispositif pyrotechnique de percussion (3) selon la revendication 4, dans lequel l'élément de verrouillage réversible est choisi parmi un élément de verrouillage à baïonnette, un élément de verrouillage par vissage, un élément de verrouillage à encliquetage. 6. Pyrotechnic percussion device (3) according to claim 4, wherein the reversible locking element is chosen from a bayonet locking element, a screw locking element, a snap locking element.
7. Générateur de gaz pyrotechnique (4) comprenant une cartouche de gaz (2) et un dispositif pyrotechnique de percussion (3) conforme à l'une quelconque des revendications 1 à 6, ladite cartouche de gaz (2) contenant un gaz sous pression et présentant une embouchure (20) munie intérieurement d'un élément d'obturation (21), dans lequel ladite embouchure (20) est montée dans l'embout proximal (34) du dispositif pyrotechnique de percussion (3) pour être en communication avec son canal intérieur (35), et le perforateur (32) est adapté pour percer ledit élément d'obturation (21) à l'activation de la charge pyrotechnique (31) pour mettre en communication le gaz sous pression avec le canal intérieur (35) pour un échappement au travers de l'au moins un trou d'échappement radial (40). 7. Pyrotechnic gas generator (4) comprising a gas cartridge (2) and a pyrotechnic percussion device (3) according to any one of claims 1 to 6, said gas cartridge (2) containing a gas under pressure and having a mouth (20) provided internally with a closing element (21), in which said mouth (20) is mounted in the proximal tip (34) of the pyrotechnic percussion device (3) to be in communication with its interior channel (35), and the perforator (32) is adapted to pierce said shutter element (21) upon activation of the pyrotechnic charge (31) to put the gas under pressure into communication with the interior channel (35). ) for exhaust through the at least one radial exhaust hole (40).
8. Dispositif d'accouplement (5) pour un accouplement entre un coussin gonflable (1) et un dispositif pyrotechnique de percussion (3) conforme à l'une quelconque des revendications 1 à 6, ledit dispositif d'accouplement (5) comprenant :8. Coupling device (5) for coupling between an inflatable bag (1) and a pyrotechnic percussion device (3) according to any one of claims 1 to 6, said coupling device (5) comprising:
- une interface de liaison (51) présentant une ouverture d'interface (52) conformée pour une liaison étanche avec une valve de gonflage (10) du coussin gonflable (1),- a connection interface (51) having an interface opening (52) shaped for a tight connection with an inflation valve (10) of the inflatable bag (1),
- une douille de montage (54) solidaire de l'interface de liaison (51), s'étendant selon un axe principal et apte à recevoir intérieurement la section circonférentielle extérieure (37) de l'embout proximal (34) du dispositif pyrotechnique de percussion (3) ; dans lequel la douille de montage (54) comprend une paroi cylindrique traversée par au moins un orifice de sortie (56) en communication avec l'ouverture d'interface (52). - a mounting sleeve (54) integral with the connection interface (51), extending along a main axis and capable of internally receiving the outer circumferential section (37) of the proximal endpiece (34) of the pyrotechnic device percussion (3); wherein the mounting socket (54) comprises a cylindrical wall traversed by at least one outlet (56) in communication with the interface opening (52).
9. Dispositif d'accouplement (5) selon la revendication 8, comprenant un plateau (55) solidaire de l'interface de liaison (51) et espacé de la douille de montage (54) le long de l'axe principal, ledit plateau (55) étant muni d'un orifice de verrouillage complémentaire (50) centré sur l'axe principal et apte à coopérer avec un élément de verrouillage réversible (42) du dispositif pyrotechnique de percussion (3) pour permettre un verrouillage réversible du dispositif pyrotechnique de percussion (3) sur ledit plateau (55). 9. Coupling device (5) according to claim 8, comprising a plate (55) integral with the connection interface (51) and spaced from the mounting socket (54) along the main axis, said plate (55) being provided with a complementary locking orifice (50) centered on the main axis and capable of cooperating with a reversible locking element (42) of the pyrotechnic percussion device (3) to allow reversible locking of the pyrotechnic device percussion (3) on said plate (55).
10. Dispositif d'accouplement (5) selon la revendication 9, dans lequel une fente (58) est ménagée dans le plateau (55) pour déboucher dans l'orifice de verrouillage complémentaire (50) afin de permettre un passage d'au moins un câble de connexion (33) sortant du dispositif pyrotechnique de percussion (3). 10. Coupling device (5) according to claim 9, in which a slot (58) is provided in the plate (55) to open into the complementary locking orifice (50) in order to allow a passage of at least a connection cable (33) exiting the pyrotechnic percussion device (3).
11. Dispositif d'accouplement (5) selon la revendication 9 ou 10, dans lequel l'orifice de verrouillage complémentaire (50) est délimité intérieurement par un pourtour oblong pour pouvoir coopérer en verrouillage avec l'élément de verrouillage réversible (42) qui est un élément de verrouillage par rotation comprenant un élément de butée oblong (43) adjacent à une gorge périphérique (44). 11. Coupling device (5) according to claim 9 or 10, in which the complementary locking orifice (50) is delimited internally by an oblong periphery to be able to cooperate in locking with the reversible locking element (42) which is a twist lock element comprising an oblong stop element (43) adjacent to a peripheral groove (44).
12. Dispositif d'accouplement (5) selon la revendication 9 ou 10, dans lequel l'orifice de verrouillage complémentaire (50) est conformé pour pouvoir coopérer en verrouillage avec l'élément de verrouillage réversible choisi parmi un élément de verrouillage à baïonnette, un élément de verrouillage par vissage, un élément de verrouillage à encliquetage. 12. Coupling device (5) according to claim 9 or 10, in which the complementary locking orifice (50) is shaped to be able to cooperate in locking with the reversible locking element chosen from a bayonet locking element, a screw locking element, a snap locking element.
13. Dispositif d'accouplement (5) selon l'une quelconque des revendications 9 à 12, dans lequel le plateau (55) est relié à la douille de montage (54) par une goulotte (57) qui prolonge la douille de montage (54) jusqu'au plateau (55). 13. Coupling device (5) according to any one of claims 9 to 12, in which the plate (55) is connected to the mounting socket (54) by a chute (57) which extends the mounting socket ( 54) to the plate (55).
14. Dispositif d'accouplement (5) selon l'une quelconque des revendications 8 à 13, dans lequel l'au moins un orifice de sortie (56) s'étend radialement par rapport à l'axe principal. 14. Coupling device (5) according to any one of claims 8 to 13, wherein the at least one outlet orifice (56) extends radially relative to the main axis.
15. Dispositif d'accouplement (5) selon l'une quelconque des revendications 8 à 14, dans lequel l'interface de liaison (51) comprend une embase (53) présentant une face supérieure (530) de laquelle fait saillie la douille de montage (54), et une face inférieure (531) opposée à la face supérieure (530) et dans laquelle est prévue l'ouverture d'interface (52) en communication avec l'au moins un orifice de sortie (56) de la douille de montage (54). 15. Coupling device (5) according to any one of claims 8 to 14, in which the connection interface (51) comprises a base (53) having an upper face (530) from which the socket projects. mounting (54), and a lower face (531) opposite the upper face (530) and in which the interface opening (52) is provided in communication with the at least one outlet orifice (56) of the mounting socket (54).
16. Système de protection gonflable comprenant un dispositif d'accouplement (5) selon l'une quelconque des revendications 8 à 15 et un coussin gonflable (1), dans lequel l'interface de liaison (51) du dispositif d'accouplement (5) est solidarisée sur une valve de gonflage (10) du coussin gonflable (1) de sorte que ladite valve de gonflage (10) est en liaison étanche avec l'ouverture d'interface (52) et avec l'au moins un orifice de sortie (56). 16. Inflatable protection system comprising a coupling device (5) according to any one of claims 8 to 15 and an inflatable bag (1), in which the connection interface (51) of the coupling device (5 ) is secured to an inflation valve (10) of the inflatable bag (1) so that said inflation valve (10) is in tight connection with the interface opening (52) and with the at least one orifice exit (56).
17. Système de protection gonflable selon la revendication 16, comprenant en outre un dispositif pyrotechnique de percussion (3) conforme à l'une quelconque des revendications 1 à 6, dans lequel la section circonférentielle extérieure (37) de l'embout proximal (34) du dispositif pyrotechnique de percussion (3) est montée de manière étanche dans la douille de montage (54) du dispositif d'accouplement (5), de sorte que l'au moins un trou d'échappement radial (40) est en communication avec l'au moins un orifice de sortie (56) et donc avec la valve de gonflage (10) du coussin gonflable (1). 17. Inflatable protection system according to claim 16, further comprising a pyrotechnic percussion device (3) according to any one of claims 1 to 6, in which the outer circumferential section (37) of the proximal tip (34 ) of the pyrotechnic percussion device (3) is mounted sealingly in the mounting socket (54) of the coupling device (5), so that the at least one radial exhaust hole (40) is in communication with the at least one outlet port (56 ) and therefore with the inflation valve (10) of the airbag (1).
18. Système de protection gonflable selon la revendication 17, dans lequel le dispositif pyrotechnique de percussion (3) est conforme à la revendication 4 et le dispositif d'accouplement (5) est conforme à la revendication 9, de sorte que l'embout distal (41) du dispositif pyrotechnique de percussion (3) est maintenu et verrouillé sur le plateau (55) du dispositif d'accouplement (5) pour un blocage en translation selon l'axe principal, par coopération entre l'élément de verrouillage réversible (42) dudit embout distal (41) et l'orifice de verrouillage complémentaire (50) dudit plateau (55). 18. Inflatable protection system according to claim 17, in which the pyrotechnic percussion device (3) conforms to claim 4 and the coupling device (5) conforms to claim 9, so that the distal tip (41) of the pyrotechnic percussion device (3) is held and locked on the plate (55) of the coupling device (5) for blocking in translation along the main axis, by cooperation between the reversible locking element ( 42) of said distal tip (41) and the complementary locking orifice (50) of said plate (55).
19. Système de protection gonflable selon la revendication 18, dans lequel le dispositif d'accouplement (5) est conforme à la revendication 10, et le dispositif pyrotechnique de percussion (3) comprend au moins un câble de connexion (33) qui sort de son embout distal (41) et qui est engagé au travers de la fente (58) ménagée dans le plateau (55). 19. Inflatable protection system according to claim 18, in which the coupling device (5) conforms to claim 10, and the pyrotechnic percussion device (3) comprises at least one connection cable (33) which emerges from its distal tip (41) and which is engaged through the slot (58) formed in the plate (55).
20. Système de protection gonflable selon l'une quelconque des revendications 17 à 19, comprenant en outre une cartouche de gaz (2), ladite cartouche de gaz (2) contenant un gaz sous pression et présentant une embouchure (20) munie intérieurement d'un élément d'obturation (21), dans lequel ladite embouchure (20) est montée dans l'embout proximal (34) du dispositif pyrotechnique de percussion (3) pour être en communication avec son canal intérieur (35), et le perforateur (32) est adapté pour percer ledit élément d'obturation (21) à l'activation de la charge pyrotechnique (31) pour mettre en communication le gaz sous pression avec le canal intérieur (35) pour un échappement au travers de l'au moins un trou d'échappement radial (40) afin de gonfler le coussin gonflable (1). 20. Inflatable protection system according to any one of claims 17 to 19, further comprising a gas cartridge (2), said gas cartridge (2) containing a gas under pressure and having a mouth (20) provided internally with a closing element (21), in which said mouth (20) is mounted in the proximal tip (34) of the pyrotechnic percussion device (3) to be in communication with its internal channel (35), and the perforator (32) is adapted to pierce said shutter element (21) upon activation of the pyrotechnic charge (31) to put the gas under pressure into communication with the internal channel (35) for exhaust through the other minus a radial exhaust hole (40) in order to inflate the airbag (1).
21. Appareil de sécurité individuelle (7) comprenant un accessoire individuel (6) apte à être porté sur un porteur, ledit accessoire individuel (6) supportant au moins un système de protection gonflable conforme à la revendication 20. 21. Personal safety device (7) comprising an individual accessory (6) capable of being worn on a wearer, said individual accessory (6) supporting at least one inflatable protection system according to claim 20.
22. Appareil de sécurité individuelle (7) selon la revendication 21, dans lequel ledit accessoire individuel (6) est une ceinture apte à être portée autour de la taille du porteur, pour une protection du bassin ou des hanches du porteur lors d'un gonflage du coussin gonflable (1) de l'au moins un système de protection gonflable. 22. Personal safety device (7) according to claim 21, wherein said individual accessory (6) is a belt capable of being worn around the waist of the wearer, for protection of the pelvis or hips of the wearer during a inflation of the airbag (1) of the at least one inflatable protection system.
PCT/FR2023/000074 2022-05-10 2023-05-04 Percussion pyrotechnic device for a pyrotechnic gas generator and associated coupling device for coupling between an airbag and a pyrotechnic gas generator WO2023218137A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2204399A FR3135379B1 (en) 2022-05-10 2022-05-10 Pyrotechnic percussion device, for a pyrotechnic gas generator, and associated coupling device for coupling between an inflatable bag and a pyrotechnic gas generator
FRFR2204399 2022-05-10

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WO2023218137A1 true WO2023218137A1 (en) 2023-11-16

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PCT/FR2023/000074 WO2023218137A1 (en) 2022-05-10 2023-05-04 Percussion pyrotechnic device for a pyrotechnic gas generator and associated coupling device for coupling between an airbag and a pyrotechnic gas generator

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002145004A (en) * 2000-08-29 2002-05-22 Daicel Chem Ind Ltd Inflator
FR3055858A1 (en) 2016-09-14 2018-03-16 Dorel France PYROTECHNIC GAS DISPENSER AND CORRESPONDING PUERICULTURE DEVICE
US20220095709A1 (en) 2020-09-30 2022-03-31 Toyoda Gosei Co., Ltd. Wearable airbag device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002145004A (en) * 2000-08-29 2002-05-22 Daicel Chem Ind Ltd Inflator
FR3055858A1 (en) 2016-09-14 2018-03-16 Dorel France PYROTECHNIC GAS DISPENSER AND CORRESPONDING PUERICULTURE DEVICE
US20220095709A1 (en) 2020-09-30 2022-03-31 Toyoda Gosei Co., Ltd. Wearable airbag device

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FR3135379B1 (en) 2024-05-17

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