US20150107477A1 - Igniting unit, especially for an inflator, inflator, airbag module, vehicle safety system and method of manufacturing an igniting unit - Google Patents
Igniting unit, especially for an inflator, inflator, airbag module, vehicle safety system and method of manufacturing an igniting unit Download PDFInfo
- Publication number
- US20150107477A1 US20150107477A1 US14/499,322 US201414499322A US2015107477A1 US 20150107477 A1 US20150107477 A1 US 20150107477A1 US 201414499322 A US201414499322 A US 201414499322A US 2015107477 A1 US2015107477 A1 US 2015107477A1
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- US
- United States
- Prior art keywords
- cap
- igniting unit
- electric igniter
- inflator
- igniter
- 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.)
- Abandoned
Links
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- 238000002485 combustion reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000004449 solid propellant Substances 0.000 description 3
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- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
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- -1 titanium hydride potassium perchlorate Chemical compound 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/10—Initiators therefor
- F42B3/12—Bridge initiators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14336—Coating a portion of the article, e.g. the edge of the article
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
-
- 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
-
- 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
- B60R21/264—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 generation of gas, e.g. pyrotechnic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/10—Initiators therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/10—Initiators therefor
- F42B3/12—Bridge initiators
- F42B3/128—Bridge initiators characterised by the composition of the pyrotechnic material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/10—Initiators therefor
- F42B3/195—Manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3481—Housings or casings incorporating or embedding electric or electronic elements
-
- 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
- B60R2021/26029—Ignitors
-
- 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
- B60R2021/26029—Ignitors
- B60R2021/26052—Ignitors using fluid materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/10—Initiators therefor
- F42B3/12—Bridge initiators
- F42B3/125—Bridge initiators characterised by the configuration of the bridge initiator case
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
Definitions
- the invention relates to an igniting unit, especially for an inflator, comprising an electric igniter having a first inner cap which forms a space for being filled with a booster propellant charge with a second outer cap.
- the invention relates to an inflator, an airbag module and a vehicle safety system.
- the invention relates to a method of manufacturing an igniting unit.
- Occupant restraint systems for motor vehicles usually include airbag modules comprising an airbag which is inflated in the case of crash so as to reduce the probability of a collision of body parts of a vehicle occupant with a vehicle component.
- airbag modules comprising an airbag which is inflated in the case of crash so as to reduce the probability of a collision of body parts of a vehicle occupant with a vehicle component.
- inflators comprising a combustion chamber which is filled with solid propellant and has a discharge end are provided.
- Inflators include at least one igniting unit for igniting the solid propellant, for example.
- GTMS glass to metal seal
- the invention is based on the idea to provide an igniting unit, especially for an inflator, wherein an electric igniter has a first inner cap which delimits a space for being filled with a booster propellant charge with a second outer cap.
- the second cap is an electrically non-conductive insulating cap.
- the igniting unit consists of an electric igniter and a second or additional cap, wherein the first cap of the electric igniter and the second additional cap delimit a space or a chamber, resp., adapted to be filled with a booster propellant charge.
- the booster propellant charge can also be referred to as booster charge.
- it can be igniter propellants such as ZPP (zirconium potassium perchlorate) and/or THPP (titanium hydride potassium perchlorate).
- electric standard igniters are thus provided with an additional cap so that between the first cap pertaining to the electric standard igniter and the second additional cap an appropriate space for being filled with a booster propellant charge can be formed, the second or additional cap being in the form of an electric insulating cap.
- the electric standard igniters may be so called GTMS (glass to metal seal) or PTMS (plastic to metal seal) igniters.
- the cap of the electric igniter i.e. the first inner cap of the igniting unit, can be made of metal and/or plastic material.
- the second outer, i.e. additional cap is an electrically non-conductive insulating cap.
- this second cap is made of plastic material at Least in portions, but in portions it could as well be made of metal.
- the second cap as electrically non-conductive insulating cap in the form of an outer cap of the igniting unit, in the mounted state of the igniter in an inflator the igniting unit and components surrounding the igniter, respectively, which might contact the second cap or outer cap are prevented from making an electrically conductive connection to the igniting unit or the igniter, respectively.
- the electric potential of the vehicle mass otherwise would be laid directly onto the second cap or outer cap so that triggering of the igniter or the igniting unit might be impaired.
- the second cap or outer cap can have a cylindrical, especially circular-cylindrical peripheral wall, for example, said cylindrical peripheral wall including an orifice on at least one longitudinal side.
- the orifice width and the diameter of the second cap can be larger than the outer dimensions of the first cap.
- the first cap too, can have a cylindrical or circular-cylindrical peripheral wall, the outer diameter and the outer cross-section of the first cap, resp., being smaller than the inner diameter and the orifice width, resp., of the second cap so that the first cap may project into a space formed by the peripheral wall and an end wall or a cover of the second cap.
- the first cap and the second cap have inner and outer dimensions so that the second cap can be put over the first cap or the first cap can be press-fitted into the second cap.
- the second cap forms a space for being filled with a booster propellant charge with the first cap.
- the first cap delimits such space together with the second cap.
- the space is delimited and formed, resp., especially by the side wall or peripheral wall of the second cap, the end wall or the cover surface of the second cap as well as the end wall or the cover surface, resp., of the first cap.
- the second cap is connected to the electric igniter by plastic insert molding.
- a plastic base is formed which connects the second cap to the electric igniter.
- GTMS glass to metal seal
- the second cap can be connected to the electric igniter by material connection, especially by laser or ultrasonic welding, or by positive and/or friction-type connection, especially by press-fitting or adhesive bonding.
- material connection especially by laser or ultrasonic welding, or by positive and/or friction-type connection, especially by press-fitting or adhesive bonding.
- PTMS plastic to metal seal
- the space formed or the chamber is filled with 30 to 1500 mg, especially with 200 to 1200 mg, especially 300 to 1000 mg, in particular 350 to 500 mg of booster propellant charge or booster charge. Accordingly, with the help of the igniting unit according to the invention a large amount of booster charge can be made available, wherein the contact between the bridge wire of the electric igniter and the pyrotechnics of the electric igniter is not affected.
- the pyrotechnical charge of the electric igniter is merely provided in a space that is formed or delimited with the aid of the first cap of the electric igniter. The booster charge therefore is separated from the pyrotechnical charge of the electric igniter.
- the first cap of the electric igniter therefore separates the booster charge of the igniting unit from the pyrotechnical charge of the electric igniter.
- the igniting unit according to the invention also chemically incompatible booster and pyrotechnical charges can be kept separately from each other.
- the booster propellant charge in addition to the pyrotechnically activatable booster charge a substantially inert material or a material decelerating combustion, for example in the form of a separate layer including such inert material or by means of individual molds thereof.
- This inert material can have a cooling effect during combustion of the pyrotechnical components of the igniting unit so that the temperature generated in total by the igniting unit can be reduced for particular applications. It is also imaginable that in the space originally formed for the booster propellant charge solely only such inert material is provided, i.e. no more pyrotechnical booster charge is taken up.
- the ignition can be configured to be not only directed forward but also spherical.
- the efficient direction for ignition of a solid propellant in a combustion chamber of an inflator by the igniting unit design according to the invention cannot only take place in the axial longitudinal direction but also in the radial direction.
- variable filling of the igniting unit is possible, as the contact of pyrotechnical charge of the electric igniter with the bridge wire thereof is provided independently of the filling of the space with a booster propellant charge.
- an auto-ignition function outside the electric standard igniter can be integrated.
- an advanced igniting means for example by means of an inserted advanced ignition tablet including a known advanced ignition means can be accommodated without said advanced ignition means having to be integrated in the pre-fabricated standard igniter.
- Such advanced ignition means can be required to stand a so called “bonfire test” as qualification feature for an igniting unit and, respectively, for an entire inflator.
- Such inflator according to the invention thus includes an igniting unit according to the invention.
- an airbag module includes an igniting unit according to the invention and/or an inflator according to the invention.
- the vehicle safety system includes an igniting unit according to the invention and/or an inflator according to the invention and/or an airbag module according to the invention.
- the vehicle safety system can be a vehicle occupant restraint system, for example an airbag and/or a seat belt.
- the igniting unit can be used, for instance, within the scope of a belt tensioning system.
- the vehicle safety system can be a further comprehensive personal safety system, for example for persons who may collide with the vehicle.
- a hood stay system in which the igniting unit initiates a stroke movement of a piston preferably guided in a cylinder is mentioned, thereby the hood of the vehicle being lifted so as to form an extended crush zone for a person colliding with the vehicle.
- personal safety systems which can be worn by a person to be protected and can be integrated in clothes, for example, including inflatable means such as an inflatable airbag helmet for cyclists or outer clothing for bikers, are an imaginable application.
- the object is achieved by the features of claim 9 and/or 11 .
- the second cap in the form of an outer cap is filled with the booster propellant charge.
- the prefabricated electric igniter is press-fitted into the second cap such that the first cap of the electric igniter and the second cap form a space which is filled with the booster propellant charge.
- the outer cap is connected to the electric igniter.
- different connecting methods can be applied.
- the outer cap can be connected to the electric igniter preferably by plastic insert molding.
- the second cap is first filled with the booster propellant charge or booster charge, resp., so that in a second step the electric igniter can be press-fitted into the filled second cap. Press-fit of the first cap within the second cap is brought about so that plastic material can subsequently be injection-molded around the second cap.
- a plastic base is formed to connect the outer cap or second cap, resp., to the electric igniter.
- the booster charge can be pellets or tablets, for example, which can be filled into the second cap or into the outer cap in a simple manner.
- the outer cap can be connected to the electric igniter preferably either by material connection, by laser or ultrasonic welding, in that the outer cap is laser-welded or ultrasonic-welded at least in portions to the first cap of the electric igniter.
- the connection of the outer cap to the electric PTMS igniter can also be a positive and/or friction-type connection.
- a robust press-fit connection can be obtained already in that the prefabricated electric igniter is press-fitted into the outer cap as described already in the foregoing.
- the outer cap can also be bonded to the cap of the electric PTMS igniter by an adhesive in the contact area.
- FIG. 1 shows a longitudinal sectional view across an igniter unit comprising a GTMS (glass to metal seal) igniter;
- GTMS glass to metal seal
- FIG. 2 shows a longitudinal sectional view across an igniter unit comprising a PTMS (plastic to metal seal) igniter;
- PTMS plastic to metal seal
- FIG. 3 shows a longitudinal sectional view across another embodiment of an igniter unit comprising a PTMS (plastic to metal seal) igniter.
- PTMS plastic to metal seal
- FIG. 1 illustrates an igniting unit 10 , especially for an inflator (not shown), an electric igniter 11 including a first cap 12 which delimits a space 14 for being filled with a booster propellant charge with a second cap 13 .
- the second cap 13 is in the form of an electrically non-conductive insulating cap.
- the electric igniter 11 can be an electrically/pyrotechnically prefabricated standard igniter. So called GTMS (glass to metal seal) standard igniters and PTMS (plastic to metal seal) standard igniters are known.
- FIG. 1 includes an electric igniter of the “GTMS standard igniter” type.
- the electric igniter 11 includes a cap 12 which may be manufactured of metal and/or plastic.
- the first cap 12 comprises a side or peripheral wall 15 and a cover 16 .
- the cover 16 is in the form of a flat end wall.
- the peripheral wall 15 on the other hand, has a rotation-cylindrical, especially circular-cylindrical shape.
- an electrically conductive bridge wire 18 projecting into the space 17 and into the pyrotechnical charge, respectively.
- the bridge wire is connected, preferably welded, to the two pins 19 in an electrically conductive manner. With the aid of a metallic ring 20 and a pressure glazing 21 the pins 19 are connected to the first cap 12 of the electric igniter 11 .
- This electric igniter 11 is a prefabricated known GTMS standard igniter, as mentioned already.
- the second cap 13 which is formed as electric insulating cap and is preferably made of plastic material, but which could also be made of metal, forms the outer cap of the igniting unit 10 .
- the outer cap or second cap 13 in turn comprises a peripheral wall 22 , which in the shown example is circular-cylindrical, as well as a cover 23 which is a substantially flat end wall.
- An orifice 27 into which the electric igniter 11 and the first cap 12 of the electric igniter 11 , resp., projects is formed on the side of the second cap 13 opposed to the cover 23 .
- the orifice 27 is formed.
- the inner diameter or the opening width of the peripheral wall 22 of the second cap 13 is larger than the outer diameter of the peripheral wall 15 of the first cap 12 so that the electric igniter 11 and the first cap 12 of the electric igniter 11 , resp., can be inserted or press-fitted into the orifice 27 of the second cap 13 .
- Both caps 12 and 13 are formed to be preferably rotationally symmetric relative to the central axis M. Furthermore, the first cap 12 of the electric igniter 11 is formed concentrically with respect to the central axis M and to the second cap 13 .
- the space 14 for being filled with a booster propellant charge or booster charge, resp., is thus delimited or formed by the first cap 12 and the second cap 13 .
- the space 14 is formed by the cover 16 of the first cap 12 as well as the cover 23 and the peripheral 22 of the second cap.
- parts of the booster propellant charge are provided between the peripheral wall 22 of the second cap 13 and the peripheral wall 15 of the first cap 12 in the area in which the two caps 12 , 13 are press-fitted into each other.
- this area there is provided no gap, at least no such gap into which parts of the propellant charge might get. Due to the strongly enlarged representation of FIG. 1 this could be interpreted in a misleading manner. Consequently, the outer diameter of the peripheral wall 15 of the first cap 12 is smaller only to such extent, compared to the inner diameter of the peripheral wall 22 of the second cap 13 , that the two caps 12 , 13 can be easily pressed into each other in terms of process.
- the space 14 is configured so that it can be filled with 30 to 1500 mg, especially 200 to 1200 mg, especially 300 to 1000 mg, in particular 350 to 500 mg of booster propellant charge.
- the second cap 13 made of plastic which is formed as outer cap is filled with the booster charge.
- the electric igniter 11 especially the first cap 12 of the electric igniter 11 is press-fitted into the second cap 13 and the orifice 27 of the second cap 13 , resp., so that the first cap 12 and the second cap 13 form the space 14 which is already filled with the booster propellant charge.
- the plastic cap 13 is connected to the electric igniter 11 by plastic insert molding.
- a plastic base 24 connecting the outer cap or second cap 13 to the electric igniter 11 is formed by plastic insert molding.
- the first cap 12 includes an inclined end flange 25 .
- the second cap 13 also includes such inclined end flange 26 .
- plastic insert molding plastic material flows into the clearance formed by the two end flanges 25 and 26 so that a proper connection of the outer plastic cap 13 to the electric igniter 11 is provided.
- the igniting unit 10 is configured to be electrically insulated, i.e. electrically non-conductive, with the exception of the two electrically conductive pins 19 .
- FIGS. 2 and 3 shows an igniting unit 10 , especially for an inflator (not shown) which substantially corresponds to the structure of FIG. 1 , but especially comprises an electric igniter 11 of the PTMS (plastic to metal seal) type standard igniter described in the foregoing.
- the individual components of the igniting units 10 of the FIGS. 2 and 3 having the same function as those of FIG. 1 are provided with identical reference numerals and the description of figures of FIG. 1 is referred to in this respect.
- FIGS. 2 and 3 Compared to FIG. 1 :
- the first cap 12 is substantially made completely of plastic and not of metal.
- the restriction “substantially” has to be understood to the effect that the first cap 12 may be made of a plastic material which is merely doped with minimal metallic particles so as to meet particular requirements concerning electrostatics and electrostatic discharges, however no large-surface continuous metallic areas on or in the first cap 12 are meant in this case.
- FIGS. 2 and 3 Another crucial difference consists in the fact that the two electrically conductive pins 19 in FIGS. 2 and 3 are not connected to a metal ring or fastened in a pressure glazing, i.e. they are not connected to the first cap of the electric igniters with the aid of a metal ring as well as a pressure glazing. Rather, in each of the FIGS. 2 and 3 both pins 19 are embedded in a plastic body 28 or a surrounded by the same by injection-molding.
- the plastic body 28 is configured so that in the area opposite to the bridge wire 18 it has a pre-shaped conical geometry that is advantageous to the further mounting of the igniting unit 10 , e.g. in an inflator.
- the plastic base 24 of the igniting unit 10 must first be manufactured, in addition to the electric igniter 11 there, by a separate plastic insert molding process.
- the plastic body 28 of the FIGS. 2 and 3 is connected to the first cap 12 , especially by ultrasonic welding, and together with the latter forms an enclosing outer housing of the prefabricated electric igniter 11 , wherein, as afore-described, the two pins 19 are embedded in the plastic body and extend across the same in parallel to the central axis M. Further in the inner space 17 of the electric igniter 11 two beds or layers of pyrotechnics are shown which are also referred to as primary and secondary charges and may have different chemical compositions.
- the second cap 13 in the form of an outer cap is filled with the booster charge.
- the electric igniter 11 especially the first cap 12 of the electric igniter 11 is press-fitted into the second cap 13 and the orifice 27 of the second cap 13 , resp., so that the first cap 12 and the second cap 13 form the space 14 which is filled already with the booster propellant charge.
- the second cap 13 is already connected to the electric igniter 11 .
- the cap 13 can be further connected to the igniter 11 by material connection by laser or ultrasonic welding. Concerning the afore-mentioned pressing operation also a parallel or subsequent bonding process is imaginable.
- FIGS. 2 and 3 differ by the illustrated form of the second cap 13 which in FIG. 3 includes an inclined end flange 26 that is adjacent to a complementary inclined end flange 25 of the first cap 12 of the electric igniter 11 .
- a beading connection can be provided by beading an area of the retaining component which exerts a retaining force on the inclined end flange 26 , the retaining force causing sufficient force connection of the end flange 26 to the end flange 25 .
- the afore-mentioned laser or ultrasonic welding process for connecting the second cap 13 to the first cap 12 might be dispensed with, where appropriate.
- the inflators, airbag modules and vehicle safety systems according to the invention are provided with igniting units 10 according to the invention in accordance with the embodiment shown in FIGS. 1 to 3 .
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Manufacturing & Machinery (AREA)
- Air Bags (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/697,319 US11940255B2 (en) | 2013-10-21 | 2019-11-27 | Igniting unit, especially for an inflator, inflator, airbag module, vehicle safety system and method of manufacturing an igniting unit |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201310017383 DE102013017383A1 (de) | 2013-10-21 | 2013-10-21 | Anzündeinheit, insbesondere für einen Gasgenerator, Gasgenerator, Gassackmodul, Fahrzeugsicherheitssystem und Verfahren zur Herstellung einer Anzündeinheit |
DE102013017383.3 | 2013-10-21 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/697,319 Division US11940255B2 (en) | 2013-10-21 | 2019-11-27 | Igniting unit, especially for an inflator, inflator, airbag module, vehicle safety system and method of manufacturing an igniting unit |
Publications (1)
Publication Number | Publication Date |
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US20150107477A1 true US20150107477A1 (en) | 2015-04-23 |
Family
ID=52774838
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/499,322 Abandoned US20150107477A1 (en) | 2013-10-21 | 2014-09-29 | Igniting unit, especially for an inflator, inflator, airbag module, vehicle safety system and method of manufacturing an igniting unit |
US16/697,319 Active 2035-08-27 US11940255B2 (en) | 2013-10-21 | 2019-11-27 | Igniting unit, especially for an inflator, inflator, airbag module, vehicle safety system and method of manufacturing an igniting unit |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/697,319 Active 2035-08-27 US11940255B2 (en) | 2013-10-21 | 2019-11-27 | Igniting unit, especially for an inflator, inflator, airbag module, vehicle safety system and method of manufacturing an igniting unit |
Country Status (3)
Country | Link |
---|---|
US (2) | US20150107477A1 (zh) |
CN (2) | CN109017667A (zh) |
DE (1) | DE102013017383A1 (zh) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018109719A1 (de) | 2018-04-23 | 2019-10-24 | Joyson Safety Systems Germany Gmbh | Anzünder für einen Gasgenerator eines Gassackmoduls und Verfahren zum Herstellen eines Anzünders |
US20200103207A1 (en) * | 2013-10-21 | 2020-04-02 | Trw Airbag Systems Gmbh | Igniting unit, especially for an inflator, inflator, airbag module, vehicle safety system and method of manufacturing an igniting unit |
US11267573B2 (en) * | 2016-09-02 | 2022-03-08 | Daicel Corporation | Small flying vehicle equipped with airbag device |
EP4122778A1 (en) * | 2021-04-19 | 2023-01-25 | Autoliv ASP, Inc. | Initiator for a gas generator of vehicle safety device |
WO2023171689A1 (ja) * | 2022-03-11 | 2023-09-14 | 日本化薬株式会社 | 点火装置 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102015014124A1 (de) * | 2015-11-03 | 2017-05-04 | Ems-Patvag s.r.o. | Zündkapsel für Insassen-Rückhaltesysteme |
JP6758329B2 (ja) * | 2016-02-10 | 2020-09-23 | 日本化薬株式会社 | ガス発生器 |
DE102017130969A1 (de) | 2017-12-21 | 2019-06-27 | Trw Airbag Systems Gmbh | Anzündeinheit, Gasgenerator, Gassackmodul, Fahrzeugsicherheitssystem und Verfahren zum Herstellen einer Anzündeinheit |
DE102019123755A1 (de) * | 2019-09-05 | 2021-03-11 | Auto-Kabel Management Gmbh | Pyrotechnische Zündpille sowie Verfahren zur Herstellung einer pyrotechnischen Zündpille |
MX2022013494A (es) * | 2020-04-28 | 2022-11-16 | Schott Ag | Encendedor para dispositivos de proteccion de pasajeros y metodo para producir el mismo. |
CN113280698A (zh) * | 2021-06-02 | 2021-08-20 | 北京理工大学 | 一种基于束能脊筋结构的传爆药壳 |
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US7343859B2 (en) * | 2003-11-10 | 2008-03-18 | Honda Motor Co., Ltd. | Squib |
EP2589920A2 (en) * | 2011-11-02 | 2013-05-08 | Indet Safety Systems a.s. | High performance initiator |
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2013
- 2013-10-21 DE DE201310017383 patent/DE102013017383A1/de not_active Ceased
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- 2014-09-29 US US14/499,322 patent/US20150107477A1/en not_active Abandoned
- 2014-10-20 CN CN201810791270.7A patent/CN109017667A/zh active Pending
- 2014-10-20 CN CN201410559186.4A patent/CN104567555A/zh active Pending
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2019
- 2019-11-27 US US16/697,319 patent/US11940255B2/en active Active
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US5142982A (en) * | 1990-01-25 | 1992-09-01 | Bayern-Chemie Gesellschaft Fur Flugchemische Antriebe Mbh | Ignition device |
US5140906A (en) * | 1991-11-05 | 1992-08-25 | Ici Americas, Inc. | Airbag igniter having double glass seal |
US5621183A (en) * | 1995-01-12 | 1997-04-15 | Trw Inc. | Initiator for an air bag inflator |
US7343859B2 (en) * | 2003-11-10 | 2008-03-18 | Honda Motor Co., Ltd. | Squib |
EP2589920A2 (en) * | 2011-11-02 | 2013-05-08 | Indet Safety Systems a.s. | High performance initiator |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20200103207A1 (en) * | 2013-10-21 | 2020-04-02 | Trw Airbag Systems Gmbh | Igniting unit, especially for an inflator, inflator, airbag module, vehicle safety system and method of manufacturing an igniting unit |
US11940255B2 (en) * | 2013-10-21 | 2024-03-26 | Trw Airbag Systems Gmbh | Igniting unit, especially for an inflator, inflator, airbag module, vehicle safety system and method of manufacturing an igniting unit |
US11267573B2 (en) * | 2016-09-02 | 2022-03-08 | Daicel Corporation | Small flying vehicle equipped with airbag device |
DE102018109719A1 (de) | 2018-04-23 | 2019-10-24 | Joyson Safety Systems Germany Gmbh | Anzünder für einen Gasgenerator eines Gassackmoduls und Verfahren zum Herstellen eines Anzünders |
EP4122778A1 (en) * | 2021-04-19 | 2023-01-25 | Autoliv ASP, Inc. | Initiator for a gas generator of vehicle safety device |
WO2023171689A1 (ja) * | 2022-03-11 | 2023-09-14 | 日本化薬株式会社 | 点火装置 |
Also Published As
Publication number | Publication date |
---|---|
CN109017667A (zh) | 2018-12-18 |
US20200103207A1 (en) | 2020-04-02 |
US11940255B2 (en) | 2024-03-26 |
DE102013017383A1 (de) | 2015-04-23 |
CN104567555A (zh) | 2015-04-29 |
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