EP0505728B1 - Allumeur à percussion pour un générateur de gaz pyrotechnique muni d'une amorce - Google Patents

Allumeur à percussion pour un générateur de gaz pyrotechnique muni d'une amorce Download PDF

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Publication number
EP0505728B1
EP0505728B1 EP92102830A EP92102830A EP0505728B1 EP 0505728 B1 EP0505728 B1 EP 0505728B1 EP 92102830 A EP92102830 A EP 92102830A EP 92102830 A EP92102830 A EP 92102830A EP 0505728 B1 EP0505728 B1 EP 0505728B1
Authority
EP
European Patent Office
Prior art keywords
guide opening
gas generator
pin
impact
transmission element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92102830A
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German (de)
English (en)
Other versions
EP0505728A1 (fr
Inventor
Artur Föhl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TRW Occupant Restraint Systems GmbH
Original Assignee
TRW Occupant Restraint Systems GmbH
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 TRW Occupant Restraint Systems GmbH filed Critical TRW Occupant Restraint Systems GmbH
Publication of EP0505728A1 publication Critical patent/EP0505728A1/fr
Application granted granted Critical
Publication of EP0505728B1 publication Critical patent/EP0505728B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/10—Percussion caps

Definitions

  • the invention relates to an impact igniter with an associated impact pin, which is guided axially displaceably in a bore of a component, in a pyrotechnic gas generator provided with a primer in a restraint system for vehicles.
  • Such a blow igniter for a gas generator is known from "Japanese Patent Summaries", Vol. 4, No. 143 (M-811), April 7, 1989.
  • the pyrotechnic gas generator cartridge is triggered mechanically by the impact of an impact element.
  • the blow must be very precisely on the center of the primer.
  • the striking element is provided with a striking pin part in order to transmit the stroke to the center of the primer.
  • the impact element must be precisely guided and aligned with the center of the primer. This can only be achieved through tight component and assembly tolerances.
  • a cartridge for automatic or semi-automatic firearms is known from US Pat. No. 4,686,905. It has a piston part containing gunpowder with an ignition pin protruding therefrom. The piston part is arranged in a bore in the cartridge, in which a striking element assigned to the ignition pin is also guided. The piston part, the firing pin and the striking element assigned to the firing pin are guided in the cartridge.
  • the invention has for its object to ensure a reliable ignition even without adhering to tight assembly and component tolerances in a blow igniter of the type specified.
  • a percussion transmission element designed as a ball or pin is received in a guide opening of the gas generator housing opposite to the striking surface of the primer, with its free end facing away from the striking surface of the primer (18)
  • Guide opening muzzle plane protrudes and is arranged opposite to the striker, the surface of which lies opposite the free end of the striking transmission element and is substantially larger than the cross-sectional area of this free end, and that the gas generator and the striker are located in two assemblies of a back tensioning device, which are separate along the muzzle plane of the guide opening Seat belt system are arranged.
  • the impact transmission element is aligned precisely in the center of the primer and held in this position.
  • a blow to the protruding free end of the impact transmission element therefore has a reliable ignition and result.
  • the blow now does not have to be centered in the axis of the primer; rather, it is sufficient if a blunt impact piece, an anvil, lever or the like hits the free end of the impact transmission element.
  • the gas generator is accommodated in a displaceable block, for example a back tensioning device engaging on the buckle of the seat belt system.
  • the exact alignment of the primer on the gas generator would require a high component and assembly tolerance for a firing pin guided in a fixed part.
  • the cylindrical housing 10 of a pyrotechnic gas generator is inserted into a bore 12 of an assembly, which is, for example, a back tensioning device in a vehicle seat belt system.
  • the housing 10 of the gas generator is secured in the bore 12 by two pins 14.
  • the gas generator is provided with a pyrotechnic charge 16 and with a primer 18.
  • the pyrotechnic charge 16 and the primer 18 are of conventional design and are therefore not described in detail.
  • the housing 10 of the gas generator has a guide opening 20 opposite the central area of the impact surface of the primer 18, in which a ball 22 is received. This ball 22 protrudes from the guide opening 20, which is narrowed at its outer end, for example by caulking, so that the ball 22 is held in it.
  • a striking part 24 is indicated, which is part of a mechanical triggering device.
  • the ball 22 forms a impact transmission element which is precisely aligned with the primer 18 through the guide opening 20 and held in this position.
  • Fig. 2 shows an embodiment with a impact transmission element, which is not designed as a ball, but as a pin 26.
  • This pin 26 has at its end opposite the primer 18 a widened and rounded head which is received in an extension of the guide opening 20.
  • the end of the pin 26 facing away from the primer 18 protrudes from the guide opening 20 which is designed as a stepped bore in order to secure the pin 26 in its interior.
  • an impact part 24 is driven with its blunt end against the end of the impact transmission element protruding from the guide opening 20, namely the pin 26, for triggering the gas generator.
  • FIG. 3 shows the use of a gas generator of the type shown in FIG. 1 in a rear tensioning device of a seat belt system for vehicles.
  • a cylinder block 32 On a load-bearing part 30, which is screwed to the vehicle body, a cylinder block 32 is guided to be displaceable in the direction of the vehicle floor.
  • the buckle 34 of the seat belt system is anchored to the cylinder block 32.
  • the gas generator 36 which is designed analogously to FIG. 1, is accommodated in a chamber 38 of the cylinder block 32.
  • a piston 42 is received in the cylinder bore 40 of the cylinder block 32 and is connected to the fitting part 30 via a rigid piston rod 44.
  • a vehicle sensitive Trigger mechanism 46 is attached to the fitting part 30.
  • the striking piece 48 comprises a swivel-mounted striking piece 48 which, under the action of a compression spring 49, can be moved against one end of a striking pin 50 which is received in a cylindrical guide bore and the other end of which is directly opposite the ball 22 of the gas generator 36.
  • the striking pin 50 thus corresponds to the striking part 24 indicated in FIG. 1.
  • the pivotable striking piece 48 is held in its rest position shown in FIG. 3 by a not shown locking mechanism; the locking of the striker 48 is overcome by a vehicle-sensitive mass, so that it is driven by the prestressed spring 49 against the adjacent end of the striker 50, so that the blunt end of the striker hits the ball 22 and drives it into the striker 18.
  • the gas generator 36 is ignited; the gases generated by it are fed through the chamber 38 of the cylinder bore 40 and drive the cylinder block 32 - since the piston 42 is fixed to the fitting part 30 - towards the vehicle floor, the lock 34 being taken along and the belt slack being pulled out of the seat belt system.

Claims (5)

  1. Amorce à percussion comportant une tige de percussion associée (24 ; 50) guidée coulissante axialement dans un alésage d'un composant d'un générateur pyrotechnique de gaz équipé d'une capsule d'amorçage (18) et faisant partie d'un système de retenue pour véhicules, caractérisée en ce qu'un élément de transmission de la percussion conformé en bille (22) ou en broche (26) est logé dans une ouverture de guidage (20) du boîtier (10) du générateur de gaz de manière à être en face de la surface de percussion de la capsule d'amorçage (18), son extrémité libre tournée à l'opposé de la surface de percussion de la capsule d'amorçage (18) dépassant du plan débouchant de l'ouverture de guidage (20) et étant disposée en face de la tige de percussion (24 ; 50) dont la surface située en face de l'extrémité libre de l'élément de transmission de la percussion (22 ; 26) est notablement plus grande que la surface en coupe transversale de cette extrémité libre, et en ce que le générateur de gaz (36) et la tige de percussion (24 ; 50) sont disposés dans deux modules (30, 32) d'un dispositif de rétraction d'un système de ceinture de sécurité qui sont séparés le long du plan débouchant de l'ouverture de guidage (20).
  2. Amorce à percussion selon la revendication 1, caractérisée en ce que les modules (30, 32) sont déplaçables l'un par rapport à l'autre le long du plan débouchant.
  3. Amorce à percussion selon la revendication 2, caractérisée en ce que l'ouverture de guidage (20) est rétrécie à l'extrémité extérieure et l'élément sphéroïdal de transmission de la percussion (22) est retenu par le rétrécissement dans l'ouverture de guidage (20).
  4. Amorce à percussion selon la revendication 1, caractérisée en ce que l'élément de transmission de la percussion est conformé en broche (26) dont l'extrémité intérieure qui est en face de la capsule d'amorçage (18) est arrondie.
  5. Amorce à percussion selon la revendication 4, caractérisée en ce que l'ouverture de guidage (20) est conformée en alésage étagé qui est rétréci du côté extérieur et la broche (26) comporte une tête élargie qui est logée dans la partie large de l'ouverture de guidage.
EP92102830A 1991-03-25 1992-02-20 Allumeur à percussion pour un générateur de gaz pyrotechnique muni d'une amorce Expired - Lifetime EP0505728B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9103660U 1991-03-25
DE9103660U DE9103660U1 (fr) 1991-03-25 1991-03-25

Publications (2)

Publication Number Publication Date
EP0505728A1 EP0505728A1 (fr) 1992-09-30
EP0505728B1 true EP0505728B1 (fr) 1994-04-20

Family

ID=6865656

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92102830A Expired - Lifetime EP0505728B1 (fr) 1991-03-25 1992-02-20 Allumeur à percussion pour un générateur de gaz pyrotechnique muni d'une amorce

Country Status (9)

Country Link
US (1) US5233925A (fr)
EP (1) EP0505728B1 (fr)
JP (1) JPH0718671B2 (fr)
CZ (1) CZ281958B6 (fr)
DE (2) DE9103660U1 (fr)
ES (1) ES2034927T3 (fr)
HU (1) HU216936B (fr)
PL (1) PL167792B1 (fr)
RU (1) RU2060179C1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9103660U1 (fr) * 1991-03-25 1991-05-29 Trw Repa Gmbh, 7077 Alfdorf, De
DE4213265C2 (de) † 1992-04-22 1996-02-29 Hs Tech & Design Treibgasgeneratoranordnung
FR2707752B1 (fr) * 1993-06-28 1995-09-22 Giat Ind Sa Chaîne d'amorçage de sécurité pour charge explosive.
DE4328760A1 (de) * 1993-08-26 1995-03-02 Trw Repa Gmbh Einrichtung zur Befestigung einer allgemein zylindrischen Gasgeneratorpatrone in einer Gurtstraffer-Antriebseinheit
US5568940A (en) * 1994-07-27 1996-10-29 Trw Vehicle Safety Systems Inc. Belt tightener for a vehicle safety belt system
FR2732108B1 (fr) * 1995-03-21 1997-06-13 Ruggieri Inflammateur mecanique
WO1999000275A1 (fr) * 1997-06-27 1999-01-07 Atlantic Research Corporation Generateur de gaz a excitation electrique et sortie modulable
US8397639B2 (en) 2011-04-08 2013-03-19 Autoliv Asp, Inc. Initiator with molded ESD dissipater
CZ306706B6 (cs) * 2012-11-15 2017-05-17 Brano A.S. Závěs motorové kapoty automobilu s aktivní ochranou chodců

Family Cites Families (21)

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Publication number Priority date Publication date Assignee Title
DE91698C (fr) *
US120196A (en) * 1871-10-24 Improvement in primers for cartridges
DE913317C (de) * 1941-08-12 1954-06-10 Aeg Anordnung fuer als Gleichrichter oder als Wechselrichter arbeitende Umformungseinrichtungen
US2669929A (en) * 1947-03-13 1954-02-23 George O Shull Safety device
US2708409A (en) * 1947-05-08 1955-05-17 Charles A Borcher Delayed firing device for a demolition cord
US2715365A (en) * 1947-05-09 1955-08-16 Ii Paul Leon Godchaux Demolition firing device
US2592623A (en) * 1948-02-16 1952-04-15 Norman K Turnbull Primer assembly for artillery ammunition
FR1056737A (fr) * 1951-06-13 1954-03-02 Const Mecaniques Et D Armement Perfectionnement aux porte-amorces
DE913137C (de) * 1952-10-02 1954-06-08 Lothar Bartsch Einrichtung zum Zuenden der Treibladung von Geschuetzmunition
US3855900A (en) * 1959-01-07 1974-12-24 Aircraft Armaments Inc System for primer actuation of bolt
US3638964A (en) * 1969-08-12 1972-02-01 Eaton Yale & Towne Vehicle safety apparatus having expandable confinement
US3706463A (en) * 1970-02-24 1972-12-19 Martin Lipkin Inflatable safety balloon with inertial means of actuation
US3732820A (en) * 1971-06-28 1973-05-15 G Hendricks Ball anvil primer
US3822896A (en) * 1972-09-19 1974-07-09 G Hallberg Automatically releasable safety device for vehicles
CH581307A5 (fr) * 1973-10-05 1976-10-29 Valinor Anstalt
US4049935A (en) * 1974-06-11 1977-09-20 Allied Chemical Corporation Pressure switch with diaphragm
US4421031A (en) * 1981-05-01 1983-12-20 Pocal Industries, Inc. Percussion fuse for training projectiles
DE3413484C2 (de) * 1984-02-04 1994-04-28 Britax Kolb Gmbh & Co Sicherheitsgurtaufrollautomat mit integrierten Gurtstrammelementen
US4686905A (en) * 1985-07-26 1987-08-18 Attila Szabo Cartridge for frangible projectile
JPS6432447A (en) * 1987-07-29 1989-02-02 Hitachi Ltd Infrared-ray remote control transmitter for magnetic recording and reproducing device
DE9103660U1 (fr) * 1991-03-25 1991-05-29 Trw Repa Gmbh, 7077 Alfdorf, De

Also Published As

Publication number Publication date
HU216936B (hu) 1999-10-28
DE59200121D1 (de) 1994-05-26
CZ281958B6 (cs) 1997-04-16
PL293898A1 (en) 1992-10-05
PL167792B1 (pl) 1995-11-30
JPH05187797A (ja) 1993-07-27
JPH0718671B2 (ja) 1995-03-06
EP0505728A1 (fr) 1992-09-30
US5233925A (en) 1993-08-10
CZ89792A3 (en) 1993-06-16
RU2060179C1 (ru) 1996-05-20
HU9201001D0 (en) 1992-06-29
ES2034927T3 (es) 1994-10-01
HUT63699A (en) 1993-09-28
DE9103660U1 (fr) 1991-05-29
ES2034927T1 (es) 1993-04-16

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