WO2001002793A1 - Inflammateur et procede de fabrication - Google Patents

Inflammateur et procede de fabrication Download PDF

Info

Publication number
WO2001002793A1
WO2001002793A1 PCT/JP2000/004338 JP0004338W WO0102793A1 WO 2001002793 A1 WO2001002793 A1 WO 2001002793A1 JP 0004338 W JP0004338 W JP 0004338W WO 0102793 A1 WO0102793 A1 WO 0102793A1
Authority
WO
WIPO (PCT)
Prior art keywords
cup
squib
embolus
electrode pins
wire
Prior art date
Application number
PCT/JP2000/004338
Other languages
English (en)
Japanese (ja)
Inventor
Junya Amano
Hiroshi Hori
Original Assignee
Nippon Kayaku Kabushiki-Kaisha
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 Nippon Kayaku Kabushiki-Kaisha filed Critical Nippon Kayaku Kabushiki-Kaisha
Priority to EP00942414A priority Critical patent/EP1209436A1/fr
Priority to KR1020027000001A priority patent/KR20020025178A/ko
Publication of WO2001002793A1 publication Critical patent/WO2001002793A1/fr

Links

Classifications

    • 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
    • F42B3/198—Manufacture of electric initiator heads e.g., testing, machines
    • 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
    • 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
    • F42B3/124—Bridge initiators characterised by the configuration or material of the bridge

Definitions

  • the present invention relates to a squib used for a gas generator that operates an occupant safety protection device such as an automobile seat belt pretensioner or an airbag.
  • a seat belt pretensioner or an airbag is known as a device that protects an occupant from an impact caused by a car collision. These pretensioners are operated by a large amount of gas introduced from the gas generator to protect occupants. Further, the gas generator is provided with a type, a gas generating agent, etc., and ignites and burns the gas generating agent by igniting the squib at the time of collision to rapidly generate a large amount of gas.
  • a squib used for a gas generator there is a squib in which an ignition powder is stored and an embolus which is inserted into the cup and seals the ignition powder is formed of plastic resin or the like. Further, the embolus has two electrode pins penetrating the embolus. Each of these electrode pins protrudes into the cup and electrically connects the bridge to the tip. The electric wire is covered with an ignition ball in contact with the ignition charge.
  • the igniter ball is made of a material with excellent ignition sensitivity. It ignites by the heat generated by the bridge and ignites the ignition charge.
  • This squib is attached to the gas generator and is energized by a collision signal from a collision sensor, causing the bridge wire to generate heat.
  • the heated wire ignites the ignition ball, and then ignites and burns the igniting charge.
  • the gas generating agent is ignited and burned by the generated pressure and heat generated by the burning of the igniting agent.
  • the ignition method used in conventional resin squeegees is stable ignition sensitivity. For the purpose of igniting, the ignition ball is ignited by the heat of the bridge wire, and the ignition charge is subsequently ignited.
  • An object of the present invention is to provide an environmentally friendly squib while reducing costs. Disclosure of the invention
  • the squib of the present invention relates to a squib used for a gas generator that operates an occupant protection device such as an automobile seat belt pretensioner or an airbag.
  • the squib of the present invention comprises: a cup; an igniting agent charged in the cup ⁇ ; an embolus for closing an opening of the cup; two electrode pins inserted into the embolus; and the two electrodes in the cup. It includes a bridge line connected between the electrode pins and ignited when energized.
  • the two electrode pins are inserted into the embolus so as to form a protrusion projecting from one end of the embolus on the cup side.
  • the electric bridge is connected between the protruding portions of the electrode pins.
  • the power lines and the protrusions are embedded in the ignition powder.
  • the electron beam and the igniting agent are brought into contact with each other under a predetermined contact pressure. Enclosed in the cup.
  • the method for manufacturing a squib of the present invention relates to a method for manufacturing a squib used for a gas generator for operating an occupant protection device such as a seat belt pretensioner wear bag of an automobile.
  • the method for manufacturing a squib of the present invention comprises the steps of loading a resin between each electrode pin and the outer periphery thereof except for both ends of two parallel electrode pins to form an embolus, and forming one end of the embolus. Connecting the two ends of the bridge wire to the protruding portions of the respective electrode pins protruding from the plug, inserting the bridge side of the embolus into the power cup, and connecting the bridge wire and the protruding portion inside the cup. Embedding the ignition plug into the cup so that the bridge and the ignition powder are sealed in the cup under a predetermined contact pressure with each other. And the step of causing
  • the contact area between the electric bridge wire and the ignition charge can be increased. Then, when an igniting agent having a component that is ignited by the heat of the bridge wire is used, the igniting agent around the bridge wire is ignited by the heat of the electric wire due to energization of each electrode pin. can do. Since the electric bridge wire and the igniting agent are sealed in the power switch in a state where a predetermined contact pressure acts on each other, the igniting agent is stably ignited even if only the electric wire is heated. can do.
  • the electric wire is connected between the projecting portions of the electrode pins and is located at a position protruding from the embolus, in the assembling step of inserting the embolus into the forceps and fitting the embolus and the cup, It can be adjusted to obtain a predetermined contact pressure.
  • a flat welding surface is arranged along the axis of each electrode pin, leaving a predetermined constant gap h and arranged substantially on the same plane. It is provided continuously, and these welding surfaces are It is preferable that both ends of the storage bridge are connected to each other.
  • the substantial length of the bridge wire is determined by the gap h between the welding surfaces. If the connection position of the bridge is within the welding surface, the substantial length of the bridge is h, and a substantially predetermined length h of the electrode wire can be obtained. Therefore, the power line can be easily connected to each electrode pin without increasing the accuracy of the connection position of the power line, and a predetermined resistance value of the power line can be secured. In addition, it is preferable that the foremost part of the projecting portion of each of the electrode pins is folded back so as to cover the connecting portion of the electric wire. With this configuration, it is possible to prevent the connecting portion of the electric bridge line from coming off due to contact resistance with the ignition agent in the step of embedding and embedding the electric wire in the ignition agent.
  • the electric bridge wire is connected to the projecting portions in a relaxed state in which no tension acts between the projecting portions of the respective electrode pins, and then sealed in the cup.
  • the loading density of the ignition powder in the forceps is 2 mg / mm 3 or more and dmg Zmm 3 or less so that the electric wire and the ignition powder are sealed in a state where a predetermined contact pressure acts on each other.
  • the igniting agent has a component that ignites by the heat generated by the electric bridge wire, and is in a powdery or granular form.
  • the dressing preferably has zirconium as a component.
  • FIG. 1 is a partial sectional view of a squib of the present invention as viewed from the front.
  • No. 2 The figure is an exploded view of the squib shown in FIG.
  • FIG. 3 is a partial sectional view of the squib embolus shown in FIG. 1 as viewed from above.
  • FIGS. 4 (a), 4 (b), 4 (c), and 4 (d) show a method of manufacturing a squib.
  • FIGS. 4 (a) and 4 (b) ) Is a front view
  • FIG. 4 (c) is a cross-sectional view as viewed from above
  • FIG. 4 (d) is a partial cross-sectional view as viewed from the front.
  • FIGS. 1 is a partial sectional view of a squib of the present invention as viewed from the front.
  • FIG. 3 The figure is an exploded view of the squib shown in FIG.
  • FIG. 3 is a partial sectional view of the squi
  • FIGS. 5 (a), 5 (b), 5 (c) and 5 (d) show the method of manufacturing the squib
  • Fig. 5 (c) is a partial sectional view from the front
  • Fig. 5 (d) is a partial sectional view from the top.
  • FIGS. 6 (a), 6 (b), and 6 (c) are views showing a method for manufacturing a squib, and are partial cross-sectional views as viewed from the front.
  • Fig. 7 (a) is a diagram showing the connection of the electric bridge lines in a conventional squib.
  • FIG. 7 (b) is a diagram showing a connection state of the electric bridge line in the squib of the present invention.
  • FIG. 8 is a partial sectional view of another squib of the present invention viewed from the front.
  • FIG. 9 is an exploded view of the squib shown in FIG.
  • FIG. 10 is a partial sectional view of a gas generator using the squib of the present invention as viewed from the front.
  • the squib 1 shown in FIG. 1 includes a cup 2, an ignition charge 3, an embolus 4, two electrode pins 5 and 6, and an electric wire 7.
  • the squib 1 is designed to reduce the manufacturing cost by forming the cup 2 and the plug 4 from resin.
  • the cup 2 is formed by a bottom portion 2b and a cylindrical portion, and is ignited. Drug 3 is loaded. Further, a convex shape 8 is formed along the inner circumference at the end of the cup 2 on the opening 2a side. This is because when the embolus 4 is inserted into the cup 2, the convex shape 8 of the forceps 2 is fitted into the mounting groove 19 provided at a predetermined position of the embolus 4, and Is provided to maintain a predetermined position in the force switch 2.
  • cup 2 examples include PBT (polybutylene terephthalate), PET (polyethylene terephthalate), PA6 (nylon 6), PA 66 (nylon 66), PPS (polyphenylene sulfide), and P PO (polyphenylene sulfide). It is composed of a resin containing a reinforcing material such as glass fiber in a resin such as poly (phenylene oxide).
  • the embolus 4 is composed of a cylindrical portion 16 inserted into the cup 2, and a flange portion 18 protruding in the diameter increasing direction at one end of the cylindrical portion 16 and continuing to the cylindrical portion 16. You. An annular mounting groove 19 into which the convex shape 8 of the cup 2 is fitted is formed on the outer periphery of the cylindrical portion 16. Further, the flange portion 18 has a tapered surface 21 whose diameter decreases toward the opposite side to the cylindrical portion 16.
  • the embolus 4 is made of, for example, a resin such as PBT, PET, PA6, PA66, PSS, PPP or the like containing a reinforcing material such as glass fiber.
  • the two electrode pins 5 and 6 are arranged in parallel with the axis of the column 16 of the embolus 4, penetrate the embolus 4 ⁇ , and protrude from both ends of the embolus 4.
  • Each of the electrode pins 5 and 6 has a curved portion 45 that curves outward in the flange portion 18.
  • Each of these electrode pins 5, 6 is formed of a single conductive round bar made of stainless steel, an alloy of iron and nickel, or the like.
  • a welding surface 24 is provided continuously at the tip of the projecting portion 23 of each of the electrode pins 5 and 6 projecting in the axial direction from the other end of the cylindrical portion 16.
  • These welding surfaces 24 are planes along the axis of each of the electrode pins 5 and 6, They are arranged side by side on a substantially same plane with a predetermined constant gap h. Such a plane can be easily formed by crushing the tips of the protruding portions 23 of the electrode pins 5 and 6 in the radial direction by press molding or the like.
  • Each of the welding surfaces 24 is formed so that the electric bridge line 7 vertically crosses the gap h between the welding surfaces 24 at the tips of the protrusions 23 in a relaxed state in which substantially no tension acts. Spanned between. Then, as shown in FIG. 3, while maintaining the slackened state in which substantially no tension acts on the electric bridge wire 7, the respective ends are welded to the respective welding surfaces 24 by welding or the like. Welded.
  • the welded portion 25 of the electric bridge wire 7 is covered by a folded portion 24 a that is a tip of the welding surface 24, which is also the tip of the projecting portion 23. As described above, if the bridge 7 is connected to the welding surface 24, as shown in FIG.
  • the substantial length of the wiring 7 is determined by the gap between the welding surfaces 24.
  • the distance is determined by h. Regardless of the position in the welding surface 24 where the connecting position of the bridge wire 7 bridged between the welding surfaces 24 vertically crosses the gap h, all the lengths of the substantial The length h is obtained, and a substantially predetermined length h of the electrode wire can be obtained without increasing the accuracy of the connection position of the power line 7. Accordingly, the electric wire 7 can be easily connected to each of the electrode pins 5 and 6, and a predetermined resistance value of the electric wire 7 can be secured.
  • the wire 7 When the welded portion 25 of the bridge wire 7 is covered by the folded portion 24 a at the end of each welding surface 24, the wire 7 is sunk into the igniting charge 3 and embedded therein. In the process, the welding portion 25 of the power line 7 can be prevented from coming off due to contact resistance with the igniter 3. -Then, the bridge wire 7 generates heat by energizing the electrode pins 5 and 6 shown in FIG.
  • the resistance value [ ⁇ / mm] of the electric wire 7 per unit length is determined to be a predetermined value so that this calorific value becomes a calorific value capable of igniting the ignition charge 3.
  • the predetermined resistance value [QZmm] is determined by the relationship between the cross-sectional shape and thickness of the electrode wire 7, the current value [A] supplied to the electrode pins 5, 6, and the like. Further, the material of the electric wire 7 has such a strength that the electric wire 7 is not cut when the plug 4 is inserted into the cup 2 while having the predetermined resistance value [ ⁇ ]. Material is selected.
  • the bridge wire 7 is formed of nickel and chrome alloy wire having excellent heat generation and strength.
  • the electric wire 7 is embedded in the igniting charge 3 so that the contact area with the igniting charge 3 is increased to efficiently ignite the igniting charge 3.
  • the igniting powder 3 in the cup 2 dinoreconium (Zr), tundane stainless steel (W), potassium perchlorate (KCIO ,,) was used as a component, and fluorine rubber, nitrocellulose, or the like was used as a binder. Preferably, one is used.
  • the composition ratio of zirconium, tungsten, and potassium perchlorate is determined so that the heat generated by the bridge 7 can ignite sufficiently.
  • Zr: W: KC 1 ⁇ ,, 3: 3.5: 3.5 by weight ratio.
  • the ignition charge 3 is used to increase the contact area with the electric bridge line 7 and to prevent the electric bridge line 7 from being cut when inserting the embolus 4 into the forceps 2. It is preferably in the form of granules or granules.
  • a pretensioner that protects the occupants of a car must be activated within a few milliseconds (ms) after a car collision. For this reason, a squib that ignites and burns a gas generating agent in a gas generator also needs to have the sensitivity to ignite within a few milliseconds (ms). Therefore, by setting the charging density of the igniting agent loaded in the cup 2 to 2 mg / mm : i or more and dmgZmm 3 or less, the predetermined contact pressure between the bridge bridge 7 and the igniting agent 3 is obtained. By sealing the battery in a state in which igniting occurs, the structure was such that the ignition current could be stably ignited by energizing 'current value (A) x several milliseconds (ms)' to the bridge wire.
  • A energizing 'current value
  • the loading density of the ignition powder was a 2 mg / mm 3 or more 4MgZmm 3 or less, 1 5 mm 3 or more spatial volume within the cup 1 20 mm 3 or less, the ignition agent amount to a 5 Omg than 48 Omg less preferable.
  • the bridge wire has a diameter of ⁇ 20 m or more and 29 / m or less, and a length of the wire is 0.5 or more and 1.2 mm or less.
  • the cutting of the tamping wire 7 is effective if the loading density (apparent specific gravity) of the igniting charge 3 is 1.3 mgZmm 3 or less. Can be prevented. Then, after submerge the bridge wire 7 in igniting agent 3, further by advancing the embolic 4 in the cup 2, the high loading density of the ignition powder 3 to 2m GZmm 3 or more 4MgZmm 3 below Umate optimum Then, raise the embolus 4 to SmgZmrn 3 and fit it into the cup 2 to maintain that state.
  • the squib of the present invention can ignite and burn the igniting charge 3 without providing an ignition ball containing a harmful substance to the railway bridge 7. Therefore, there is no need to provide ignition balls containing harmful substances, so low cost and environmentally friendly squibs have been provided.
  • FIG. 4 a method for manufacturing the squib 1 of the present invention will be described with reference to FIGS. 4 to 6.
  • the squib i of the present invention is manufactured by performing the following steps.
  • FIGS. 4 to 6 members having the same functions as those shown in FIGS. 1 to 3 are denoted by the same reference numerals.
  • one conductive rod 40 made of stainless steel or an alloy of iron and nickel is prepared.
  • the conductive rod 40 is bent into a U-shape by press molding or the like.
  • Two parallel electrode pins 5, 6 having a straight portion and a bent portion 46 are formed.
  • One end of each of the electrode pins 5, 6 remains connected by a U-shaped bent portion 46.
  • a symmetrical curved portion 45 is formed on a part of the linear portion of each of the electrode pins 5 and 6 by breath molding or the like. In this manner, two parallel electrode pins 5, 6 having the curved portion 45 and the first and second linear portions 5a, 6a, 5b, 6b sandwiching the curved portion 45 are provided. Is formed. The electrode pins 5, 6 are still connected by a U-shaped bend 46.
  • the embolus 4 It is formed by using two molds 41 and 42 having continuous first and second molding spaces 43 and 44 corresponding to the cylindrical portion 16 and the flange portion 18 of FIG.
  • the first linear portions 5a, 6a of the electrode pins 5, 6 are arranged in parallel along the axis of the first mold space 43.
  • the curved portion 45 of each of the electrode pins 5, 6 is arranged in the second mold space 44. Ends of the first and second linear portions 5a, 6a, 5b, 6b of the electrode pins 5, 6 are projected from the first and second mold spaces 43, 44. In this state, the resin is injected into the first and second mold spaces 43 and 44 and loaded.
  • the electrode pins 5 and 6 and the cured resin are peeled off from each of the molds 41 and 42.
  • an embolus 4 as shown in Fig. 4 (d) is obtained.
  • Each of the electrode pins 5, 6 penetrates through the embolus 4 and protrudes from both ends, and is integrated with the embolus 4.
  • the bent portions 46 on the first linear portions 5a, 6a side of the electrode pins 5, 6 projecting from the cylindrical portion 16 of the embolus 4 are cut, and are independent from each other. Form each electrode pin 5,6.
  • the bent portion 46 is cut leaving a length capable of forming the welding surface 24 at the tip of the protruding portion 23 of each of the electrode pins 5 and 6 protruding from the cylindrical portion 16 of the embolus 4.
  • each protruding portion 23 is crushed in the radial direction by press molding or the like to form a welding surface 24 along the axis of each of the electrode pins 5 and 6.
  • the accuracy of the surface roughness and the parallelism of the welding surfaces 24 is ensured so that the welding surfaces 24 are arranged on the same plane with a predetermined gap h therebetween.
  • both ends of the bridge wire 7 are welded to the welding surface 24 at the tip of each protrusion 23 by welding or the like.
  • the electric bridge wire 7 is bridged between the welding surfaces 24 so as to vertically traverse the gap h between the welding surfaces 2, and in a relaxed state where substantially no tension acts, both ends thereof are It is welded to the welding surface 24 of the projection 23.
  • the welding wire 24 can be welded to any position on the welding surface 24.
  • the actual length is the same.
  • the wire bridge 7 is welded to a position on the welding surface 24 such that the wire bridge 7 projects from the end of the embolus 4 by 0.5 to 4.0 mm.
  • the tip of the welding surface 24 of each projection 23 is folded back so as to cover the welded portion 25 of the electric bridge line 7. Then, the welded portion 25 of the electric wire 7 is wrapped by the folded portion 24a.
  • Step of embedding the electric wire 7 and the projecting portion 23 in the igniting charge 3 As shown in FIG. 6 (a), prepare the cup 2 containing the igniting charge 3.
  • the cup 2 is formed at the same time as each of the above steps or in advance in a cup shape using a resin material such as PBT, PET, PA6, PA66, PPS, and PPO containing a reinforcing material such as glass fiber.
  • the igniting agent 3 is stored in the cup 2 in a non-pressurized state using a powdered or granulated material.
  • the embolus 4 is further pushed into the bottom 2b side of the cup 2 to gradually increase the loading density of the powdery or granular ignition powder 3.
  • the electric bridge ⁇ ⁇ ⁇ has a projecting shape in which the electric bridge 7 protrudes from the embolus 4 together with the respective projecting parts 23, the contact with the igniting agent 3 is made within the power switch 2. The pressure is gradually increased.
  • the bridge wire 7 is installed between the electrode pins 5 and 6 in a slack state where the tension is not applied to the bridge wire 7, the bridge wire 7 is pushed into the cup 2 and rises to the extent of the contact pressure. Therefore, the bridge 7 will not be cut.
  • the convex shape 8 of the cup 2 is fitted into the mounting groove 19 of the embolus 4.
  • the embolus 4 is maintained in a predetermined position on the cup 2.
  • the charging density of the igniting agent 3 in the cup 2 becomes a desired charging density, and the electric wire 7 comes into contact with the igniting agent 3 at a desired contact pressure.
  • the squib 1 in which the embolus 2 and the cup 2 are integrated is assembled.
  • the electric bridge 7 and the ignition charge 3 are sealed in a state where a predetermined contact pressure is generated.
  • the ignition charge 3 is stabilized by the current of (A) X several milliseconds (ms) for the electric wire 7. If it can be ignited, it is not necessary to seal the power line 7 and the igniting charge 3 at a predetermined contact pressure with each other.
  • the squib 1 of the present invention uses the cup 2 made of resin, for example, a metal cup, a cup having a double structure made of metal and resin, or the like can be used. Further, in the squib 1 of the present invention, the welding portion 2 of the electric bridge wire 7 is folded by folding back the tip 24 a of the welding surface 24 which is also the tip of the projecting portion 23 of each of the electrode pins 5 and 6. Although it is a configuration that protects the welding wire 5, if the bridge wire 7 can sufficiently withstand the contact resistance and contact pressure with the igniting agent 3, it is not always necessary to turn the tip of the welding surface 24.
  • FIGS. 8 and 9 members having the same functions as those shown in FIGS. 1 and 2 are denoted by the same reference numerals.
  • FIGS. 8 and 9 are different from FIGS. 1 and 2 in the shapes of the cup 71 and the embolus 72.
  • the cup 71 of the squib 31 has a cylindrical portion 71c and a stepped portion 71d extending from the cylindrical portion 71c while being larger in diameter than the cylindrical portion 71c on the opening 7la side. I have.
  • An annular mounting groove 32 is formed in the inner periphery of the cylindrical portion 71c, and a thin rupture portion 33 is formed in the bottom portion 71b.
  • the cylindrical portion 7 1 c has an inner surface along a contour of a cylindrical portion 7 2 a of an embolus 72 described later, and the stepped portion 7 1 d has a ring of a flange portion 72-b of an embolus 72 described later. It has an inner surface.
  • the embolus 72 of the squib 31 is a stepped cylindrical body that closely contacts the contour of the inner surface of the stepped cup 71.
  • the embolus 72 is composed of a cylindrical portion 72 a and a flange portion 72 b protruding at one end of the cylindrical portion 72 a in the radially expanding direction and continuing with the cylindrical portion 72 a.
  • a ridge 34 fitted into the mounting groove 32 of the cup 71 is provided along the outer periphery of the cylindrical portion 72a.
  • Squib 31 is assembled as follows.
  • the bridge 7 side of the embolus 72 is inserted into the cup 71.
  • Embolus 7 2 Protruding from the column 7 2 a
  • the cylindrical part 72 a of the embolus 72 is inserted into the cup 71 while the projecting part 23 and the bridge wire 7 are sunk into the ignition powder 3 of the cup 71.
  • the plug 72 is pushed into the bottom 71 b side of the cup 71 to gradually increase the charge density of the powdery or granular igniter 3.
  • the embolus 72 When the embolus 72 reaches a predetermined position in the cup 71, that is, when the ignition charge reaches a predetermined loading density, the ridges 34 of the embolus 72 are inserted into the mounting grooves 32 of the cup 71. Fit in.
  • the stepped portion 71d of the force cap 71 closely contacts the flange portion 72b of the plug 72, and the cylindrical portion 71c of the cup 71 is connected to the cylindrical portion 72a of the plug 72. It will be in close contact.
  • the cup 71 and the embolus 72 are engaged with each other at a predetermined position to form an integrated squib 31.
  • the same effect as that of the squib 1 shown in FIGS. 1 and 2 can be obtained.
  • the embolus 72 and the cup 71 are in close contact with each other from the cylindrical portion 71 c of the cup 71 to the opening 71 a, and the sealing property is enhanced by increasing the contact area between the embolus 72 and the cup 71.
  • the gas generator shown in FIG. 10 operates a seat belt pretensioner of an automobile, and includes a squib 1, a holder 52, a gas generating agent 61, and a housing 62.
  • the holder 52 is a holder for mounting the squib 1, and has a first stepped portion 58 which is a mounting seat of the squib 1 on an inner peripheral surface, and a tapered surface from the top of the flange portion 18 of the squib 1.
  • 21 is a cylindrical body having a second step portion 59 which is in close contact with a part of 21.
  • the inside of the holder 52 is The space provided with the second step portion 59 side from the seat 58 becomes a space 55 for accommodating the flange portion 18 of the squib 1, and the opposite side is the electrode pins 5, 6. There is a space 5 6 for storing
  • the mounting seat 58 is provided with a seal ring 57.
  • the squib 1 is inserted into the holder 52 from the side of the second step portion 59, and the taper surface 21 of the flange portion 18 is brought into contact with the scenery ring 57 so that the mounting seat 5 is mounted. It is set at 8.
  • the end of the holder 52 on the side where the squib 1 is inserted has a first caulking portion 54 caulked along the shape of the flange portion 18 of the squib 1.
  • Electrode pins 5 and 6 are housed in a space 56 in the holder 52 opposite to the mounting seat 58.
  • the housing 62 is for accommodating the squib 1 together with the gas generating agent 61, and is a metal-made bottomed cylindrical housing. Gas is discharged from the housing 62 of the gas generator G to the outside of the seat belt pre-tensioner 1 from the housing 62 of the gas generator G. A hole 62a is formed. The gas emission holes 62 a are closed by a thin burst plate 63 made of aluminum or the like.
  • the side of the holder 52 from which the squib 1 protrudes is inserted into the housing 62.
  • the opening of the housing 62 is closed by the holder 52.
  • a second caulking portion 53 caulked along the opening of the housing 62 is provided on the outer periphery of the holder 152.
  • the gas generator G having the above configuration ignites and burns the igniting charge 3 by the heat generated by the power wire 7 when the electrode pins 5 and 6 of the squib 1 are energized.
  • the flame from the squib 1 ignites and burns the gas generating agent 61 to generate a large amount of gas.
  • the squib of the present invention can also be applied to a gas generator for inflating and deploying an airbag due to an automobile collision.
  • This gas generator is available for the driver's seat, the passenger seat or for a side collision.
  • the gas generated by burning the gas generating agent inflates and deploys the airbag.
  • the squib is mounted in the gas generator housing.
  • a gas generating agent, a filter, and the like are arranged in the housing.
  • the gas generated by the squib is combusted through the transfer agent or directly by the squib to generate a large amount of gas for inflating and deploying the airbag.
  • a powder or granule containing zirconium as an igniting agent is used, and the space volume of the cup (mm 3 ), the amount of the igniting agent (mg), the diameter of the bridge wire ⁇ ( ⁇ ⁇ ), Select the length (mm) of the bridge wire as appropriate, and assemble a squib with a loading density of ignition charge 3 of 2 mg / mm 3 or more and 4 mg / mm 3 or less. I prepared it.
  • the space volume in Cup 2 was set to 120 mm 3
  • the loading amount of Ignition Charge 3 was set to 240 mg in order to set the charge density of the ignition charge to 2 mgZmm 3 .
  • the space volume 30 mm 3 in the cup 2 was loaded with the ignition agent 3 and 1 2 Omg.
  • the space volume 3 0 mm 3 in the cup 2 was set to the loading amount of ignition powder 3 and 9 Omg.
  • the squib of the present invention stably ignites the ignition powder without covering the electric wire with an ignition ball containing a harmful substance, and provides a gas generator for protecting and concealing a shellfish such as a seat belt pretensioner pair bag. Operation is guaranteed, reducing costs and making it an ideal eco-friendly squib

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Air Bags (AREA)
  • Automotive Seat Belt Assembly (AREA)

Abstract

Cette invention concerne un inflammateur que l'on utilise avec une source de gaz afin d'actionner un dispositif de sécurité dans un véhicule tel qu'un dispositif de prétension de ceinture de sécurité ou un airbag. Cet inflammateur comprend une coupelle (2), un agent d'allumage (3) placé dans la coupelle (2), un bouchon (4) fermant une ouverture de la coupelle (2), deux broches d'électrodes (5, 6) traversant le bouchon (4), et un fil de pontage (7) connecté entre les deux broches d'électrodes (5, 6) dans la coupelle (2) et servant à l'allumage lorsque mis sous tension. Les deux broches d'électrodes (5, 6) traverse le bouchon (4) et forment des protubérances (23)sur le côté coupelle dudit bouchon (4). Le fil de pontage (7) est connecté entre les protubérances (23) des broches d'électrodes (5, 6). Le fil de pontage (7) et les protubérances (23) sont noyés dans l'agent d'allumage (3), tandis que le fil de pontage (7) et l'agent d'allumage (3) sont scellés dans la coupelle (2) de manière qu'ils maintiennent entre eux une pression de contact prédéterminée.
PCT/JP2000/004338 1999-07-02 2000-06-30 Inflammateur et procede de fabrication WO2001002793A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP00942414A EP1209436A1 (fr) 1999-07-02 2000-06-30 Inflammateur et procede de fabrication
KR1020027000001A KR20020025178A (ko) 1999-07-02 2000-06-30 스퀴브 및 스퀴브의 제조방법

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11188929A JP2001021293A (ja) 1999-07-02 1999-07-02 スクイブ、及びスクイブの製造方法
JP11/188929 1999-07-02

Publications (1)

Publication Number Publication Date
WO2001002793A1 true WO2001002793A1 (fr) 2001-01-11

Family

ID=16232373

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2000/004338 WO2001002793A1 (fr) 1999-07-02 2000-06-30 Inflammateur et procede de fabrication

Country Status (6)

Country Link
EP (1) EP1209436A1 (fr)
JP (1) JP2001021293A (fr)
KR (1) KR20020025178A (fr)
CZ (1) CZ20014541A3 (fr)
TW (1) TW482889B (fr)
WO (1) WO2001002793A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7267056B2 (en) 2002-03-29 2007-09-11 Toyota Jidosha Kabushiki Kaisha Initiator

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002060728A1 (fr) * 2001-01-29 2002-08-08 Nippon Kayaku Kabushiki-Kaisha Generateur de gaz
CZ20033416A3 (en) * 2001-05-15 2004-04-14 Nippon Kayaku Kabushiki-Kaisha Gas generator
JP3864823B2 (ja) 2002-03-28 2007-01-10 トヨタ自動車株式会社 イニシエータ、インフレータおよび車両の乗員頭部保護エアバッグ装置
EP1541429B1 (fr) * 2002-07-19 2006-06-21 Nippon Kayaku Kabushiki Kaisha Generateur de gaz
US7007973B2 (en) * 2003-04-22 2006-03-07 Key Safety Systems, Inc. Tubular dual stage inflator
JP3822875B2 (ja) 2004-01-13 2006-09-20 三桜工業株式会社 プリテンショナーのガスジェネレータ取付け構造及び取付け方法
DE602005024757D1 (de) 2004-11-30 2010-12-30 Weatherford Lamb Nicht-explosiver Zweikomponenteninitiator
FR2885684B1 (fr) * 2005-05-10 2012-04-27 Davey Bickford Initiateur electrique a structure plastique et fonctionnement rapide et generateur de gaz comportant un tel initiateur
JP4644296B2 (ja) 2009-07-29 2011-03-02 昭和金属工業株式会社 ガス発生器
JP5637763B2 (ja) * 2010-08-06 2014-12-10 タカタ株式会社 プリテンショナ、シートベルトリトラクタ、シートベルト装置、およびプリテンショナの組立方法
DE102013020526A1 (de) * 2013-12-11 2015-06-11 Trw Airbag Systems Gmbh Polkörper für einen pyrotechnischen anzünder eines gasgenerators, anzünder, gasgenerator und gassackmodul mit einem derartigen polkörper
JP6616250B2 (ja) * 2016-06-21 2019-12-04 株式会社東海理化電機製作所 ウェビング巻取装置及びその製造方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3837332A1 (de) * 1988-11-03 1990-05-10 Kostal Leopold Gmbh & Co Kg Sprengkapsel
JPH0328182U (fr) * 1989-07-31 1991-03-20
JPH0338722U (fr) * 1989-08-19 1991-04-15
JPH0358511U (fr) * 1989-10-12 1991-06-07
US5140906A (en) * 1991-11-05 1992-08-25 Ici Americas, Inc. Airbag igniter having double glass seal
US5798476A (en) * 1996-03-25 1998-08-25 Trw Inc. Initiator for an air bag inflator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3837332A1 (de) * 1988-11-03 1990-05-10 Kostal Leopold Gmbh & Co Kg Sprengkapsel
JPH0328182U (fr) * 1989-07-31 1991-03-20
JPH0338722U (fr) * 1989-08-19 1991-04-15
JPH0358511U (fr) * 1989-10-12 1991-06-07
US5140906A (en) * 1991-11-05 1992-08-25 Ici Americas, Inc. Airbag igniter having double glass seal
US5798476A (en) * 1996-03-25 1998-08-25 Trw Inc. Initiator for an air bag inflator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7267056B2 (en) 2002-03-29 2007-09-11 Toyota Jidosha Kabushiki Kaisha Initiator

Also Published As

Publication number Publication date
TW482889B (en) 2002-04-11
EP1209436A1 (fr) 2002-05-29
CZ20014541A3 (cs) 2002-05-15
JP2001021293A (ja) 2001-01-26
KR20020025178A (ko) 2002-04-03

Similar Documents

Publication Publication Date Title
JP4244365B2 (ja) 着火薬組成物、及びその着火薬組成物を用いた点火具
US5821446A (en) Inflator for an inflatable vehicle occupant protection device
WO2001002793A1 (fr) Inflammateur et procede de fabrication
WO2001031282A1 (fr) Amorceur de type electrique et pretensionneur
JPWO2007083663A1 (ja) ガスアクチュエータ用小型ガス発生器及びプリテンショナーシステム
US7125041B2 (en) Gas generator
EP1591159A1 (fr) Generateur de gaz
WO2001051192A1 (fr) Generateur de gaz
WO2010079710A1 (fr) Générateur de gaz
EP0864843B1 (fr) Générateur de gaz, p.ex. pour véhicule, comportant un allumeur du type à pont et méthode de fabrication d'un tel allumeur
JP2003025950A (ja) ガス発生器
WO2004012965A1 (fr) Generateur de gaz
WO2002100800A1 (fr) Composition d'agent d'allumage, et outil d'allumage utilisant ladite composition
US6979024B2 (en) Gas generator for seat belt pretensioner
JP2010143270A (ja) ガス発生器
WO2023100407A1 (fr) Générateur de gaz
JP2015157618A (ja) ガス発生器
JP2000329500A (ja) スクイブ
JP6869879B2 (ja) 点火器
JP2010260388A (ja) ガス発生器
EP1498686A1 (fr) Generateur de gaz
JP7434111B2 (ja) ガス発生器
WO2022239790A1 (fr) Ensemble allumeur et dispositif de génération de gaz
JP2000292098A (ja) スクイブ
WO2024090470A1 (fr) Générateur de gaz

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CA CZ KR US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: PV2001-4541

Country of ref document: CZ

WWE Wipo information: entry into national phase

Ref document number: 1020027000001

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 2000942414

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1020027000001

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 10019279

Country of ref document: US

WWP Wipo information: published in national office

Ref document number: PV2001-4541

Country of ref document: CZ

WWP Wipo information: published in national office

Ref document number: 2000942414

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 2000942414

Country of ref document: EP

WWR Wipo information: refused in national office

Ref document number: 1020027000001

Country of ref document: KR