WO2002092400A1 - Generateur de gaz - Google Patents
Generateur de gaz Download PDFInfo
- Publication number
- WO2002092400A1 WO2002092400A1 PCT/JP2002/004684 JP0204684W WO02092400A1 WO 2002092400 A1 WO2002092400 A1 WO 2002092400A1 JP 0204684 W JP0204684 W JP 0204684W WO 02092400 A1 WO02092400 A1 WO 02092400A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cup
- igniter
- gas generator
- base end
- embolus
- Prior art date
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
- F42B3/103—Mounting initiator heads in initiators; Sealing-plugs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R22/00—Safety belts or body harnesses in vehicles
- B60R22/34—Belt retractors, e.g. reels
- B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
- B60R22/4628—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators
-
- 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
Definitions
- the present invention activates an automobile safety device having a movable portion such as a seat belt pretensioner, an occupant forward movement restraint device, a movable headrest, and a battery current interrupter in an emergency (at the time of an automobile collision).
- the present invention relates to a small gas generator used for the purpose. Background art
- These gas generators are mounted on a cylinder, for example, and are used for driving bistons by the pressure of the generated gas and for activating the above-mentioned vehicle safety device by the driving force.
- an igniter that ignites when energized is fixed to a first fixed portion inside a holder via a first seal member by caulking or the like. It has a structure in which the base end of this force-up is fixed to the second fixed portion outside the holder by a caulking or the like via a second seal member.
- the gas generator In order to fix the gas generator containing the gas generating agent to the holder in a state in which it is isolated from the outside air, the gas generator is provided separately from the first fixing portion for fixing the inner igniter, and the outer holder base end. And a second fixing portion for fixing the fixing member.
- the holder is provided with a first seal member between the igniter and the holder and a second seal member between the cup and the holder.
- This conventional gas generator has a fixed part at two places and a sealed part at two places, and the two parts must be fixed and sealed securely.
- the two fixed parts exist separately, so the outer diameter is inevitably large. And it was difficult to respond to miniaturization and high output of the equipment.
- the present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a gas generator which can share a structure for fixing a igniter and a cup to a holder and can surely seal the holder.
- the above-mentioned safety device can use a thin cylinder, and the same amount of gas generating agent can be used to obtain a higher output than before. is there. Disclosure of the invention
- a gas generator includes a first cup having a bottomed cylindrical shape that stores a gas generating agent that generates gas by combustion, and an igniter that is partially inserted into the first power cup. And a holder for covering the igniter and holding a proximal end of the first cup, wherein the proximal end of the first force-up and the igniter are directed toward the igniter of the holder. It is fixed by tightening.
- the igniter and the base end of the first cup are fixed together by tightening toward the igniter of the holder, the igniter and the base end of the first cup are fixed to the holder in one place. This simplifies the production and simplifies the structure, which makes it possible to reduce the size of the gas generator.
- a see-through member is disposed between the base end of the first cup and the ignition device.
- a seal member acts between the base end of the first power cup and the igniter, and the gas generating agent in the first cup is sealed with the igniter covered.
- the igniter includes: a second cup containing an igniting agent; and an embolus holding the second cup.
- the outside of the second forcep is inserted in the fitted state Since the second nip containing the igniting agent is inserted into the first nip containing the gas generating agent in a fitted state, the first cup is guided by the second cup, and the first nip is introduced. It is held by the igniter and fixed to the holder. Further, in order to reinforce the second cup with the first cup, it is preferable that the outer circumference of the second cup and the inner circumference of the first force cup are substantially the same.
- the gas generator of the present invention is such that the base end of the first cup is inserted so as to abut against the embolus, and the seal member is disposed at a boundary between the second cup and the embolus. It is.
- the base end of the first forcep abuts the embolus, so that the position of the seal member such as the O-ring is stabilized.
- the base end of the first cup and the embolus with which the base end abuts are formed on tapered surfaces. Abutment between the base end of the first cup and the embolus. The condition can be stabilized. Further, the tapered surface facilitates the storage of the gas generating agent in the first cup.
- the igniter and the base end of the first cup are fixed by caulking the holder toward the igniter.
- the abutment between the base end of the first cup and the embolus is formed in a tapered surface, and the holder can be firmly tightened together by swaging from the holder force toward the embolus.
- FIG. 1 is a sectional view of a gas generator according to an embodiment of the present invention.
- FIG. 2 is a sectional view of an igniter used in the gas generator of FIG. Fig. 3
- FIG. 4 is a cross-sectional view of another example of the igniter used for the gas generator.
- FIG. 4 is a table summarizing the specifications of the gas generator used in the 10 cc bomb test as an example.
- FIG. 5 is a diagram showing the results of a 10 cc bomb test.
- FIG. 6 is a schematic diagram of a measuring device used for a 10 cc bomb test.
- FIG. 1 is a cross-sectional view of a gas generator
- FIG. 2 is a cross-sectional view of an igniter.
- the gas generator 1 includes a first cup 2, a gas generating agent 3, an igniter 4, and a honoreda 5.
- the first cup 2 includes a cylindrical portion 2a, a bottom portion 2b on the distal end or upper end side of the cylindrical portion 2a, and a diameter-enlarging soot portion 2c on the base end or lower end side of the cylindrical portion 2a. It has a bottomed cylindrical shape as a whole.
- the material of the first cup 2 is preferably a metal material such as stainless steel, aluminum, brass, or iron, but may be made of resin.
- a plurality of linear notches 2 d extending radially from the center are provided on the outer surface of the bottom 2 b of the first cup 2.
- the enlarged skirt 2c of the first cup 2 functions as a tapered flange supported by the igniter 4 and the holder 5, which will be described later.
- the gas generating agent 3 is accommodated in a state of directly contacting the inner periphery of the first cup 2.
- the notch 2 d is broken, and a seat belt pretensioner (not shown), an occupant forward movement restraint device, a movable headrest, a battery current interrupter, etc. Gas is released directly to any vehicle safety device.
- the igniter 4 passes an ignition charge 11, a second cup 12 in which the ignition charge 11 is stored, and a current for igniting the ignition charge 11.
- the two pins 13 and 14 erected for power supply, the plug 15 to which the pins 13 and 14 are attached, and the plug 1 that covers and holds the lower part of the second cup 12 And 6.
- the igniting agent 11 for example, an agent containing zirconium, tungsten, potassium perchlorate, and a binder can be used.
- the second cup 12 has a bottomed cylindrical shape in which an inner cup 12 a made of metal and an outer cup 12 b made of insulating resin are stacked.
- the ignition powder 11 is accommodated inside the second cup 12 and closed with a metal plug 15.
- a pin 13 is joined to the lower part of the plug 15 in an upright state, and a pin 14 penetrates through a through hole 15 a at the center of the plug 15 via a glass seal 15 b which is an insulator. It is installed in.
- a bridge 17 that generates heat when energized is attached.
- the lower end of the metal inner cup 12a and the lower periphery of the plug 15 are joined by laser welding 18 or the like.
- the embolus 16 is a resin molded body that covers and holds the lower end side of the second cup 12 and the portions of the pins 13 and 14 that protrude from the plug 15.
- the outer periphery of the embolus 16 has a step 16 a at the boundary with the second cup 12, an enlarged taper 16 b, a large-diameter cylinder 16 c, and a reduced-diameter taper 16 d And a small-diameter cylindrical portion 16 e.
- Examples of the resin used for the resin molding of the embolus 16 include polybutylene terephthalate, polyethylene terephthalate, nylon 6, nylon 66, nylon 12, polyphenylene sulfide, polyphenylene oxide, polyethylene imide, and polyether. Resins such as imid, polyetheretherketone, polyethersulfone, and the like containing glass fiber, carbon, and the like are included.
- the outer circumference of the second cup 12 fits into the inner circumference of the first cup 2. Have been. It is preferable that both are brought into close contact with each other, and the gap between the two is preferably 1 mm or less, more preferably 0.2 mm or less.
- the enlarged skirt portion 2c of the first cup 2 has a length along the enlarged seal portion 16b of the embolus 16 (see FIG. 2).
- An O-ring 19 as a sealing member is fitted in the step 16a (see FIG. 2) at the boundary of the embolus 16 with the second cup 12, and the expanded skirt of the first cup 2 2 Crushed at the root of c.
- the holder 5 is made of a metal material such as stainless steel, annealed aluminum, brass, or iron, or a hard resin.
- the holder 5 has a first hole 2 into which the large-diameter cylindrical portion 16b, the reduced-diameter portion 16c, and the small-diameter cylindrical portion 16d of the outer peripheral portion of the plug 16 of the igniter 4 are fitted. 1, a second hole 22 for fitting the shorting clip 6 from below, and a protruding portion 23 extending upward from the first hole 21 and capable of being pressed inward. I have.
- the holder 5 positions the igniter 4 at the center of the first cup 2, fixes the position of the first cup 2, and holds the plug 16 of the igniter 4.
- the shorting clip 6 is attached to keep the two pins 13 and 14 of the igniter 4 short.
- the shorting clip 6 is used to prevent malfunction due to static electricity or the like until the gas generator 1 is mounted in a proper state.
- the gas generator 1 configured as described above can be manufactured by the following procedure.
- the second cup 12 of the igniter 4 is fitted into the first cup 2.
- the set of the first cup 2 and the igniter 4 is fitted into the first hole 21 of the holder 5, and the projection 23 is crimped to the plug 16 of the igniter 4, thereby forming the first cup 2.
- the O-ring 19 interposed between the first cup 2 and the igniter 4 is in a crushed state, and the first ring 2 and the second cup 12 of the igniter 4 Seal the gap.
- the operation of the gas generator 1 will be described.
- the gas generator 1 When the gas generator 1 is connected to the connector in a normal state, the short circuit by the shorting clip 6 is released.
- a collision sensor (not shown) detects a collision of the vehicle, electricity is supplied to pins 13 and 14 provided on the igniter 4. Then, the electric wire 17 in the igniter 4 generates heat, and the ignition charge 11 ignites.
- the fragile portion at the bottom of the second cup 12 is broken, and high-temperature and high-pressure gas or particles are sprayed on the gas generating agent 3 in the first forcep 2 at a stretch. Then, the gas generating agent 3 is ignited.
- the large amount of gas generated in the first cup 2 by the combustion of the gas generating agent 3 rapidly increased the internal pressure of the first cup 2, and eventually the notch provided in the bottom 2b of the first cup 2
- vehicle safety devices such as a seat velvet pretensioner, an occupant forward movement restraint device, a movable headrest, and a battery current interrupter.
- the gas generating agent that can be used in the gas generator of the present invention contains, for example, a nitrogen-containing organic compound and an inorganic compound, and an additive can be added as needed.
- Nitrogen-containing organic compounds mainly function as fuel components.
- the inorganic compound mainly functions as an oxidizing agent component.
- Examples of the nitrogen-containing organic compound include at least one selected from the group consisting of aminotetrazole, guanidine nitrate, and nitroguanidine. I can do it.
- Examples of the inorganic compound include at least one selected from the group consisting of strontium nitrate, ammonium nitrate, potassium nitrate, ammonium perchlorate, and potassium perchlorate.
- An additive is molybdenum trioxide, which is a self-igniting catalyst.
- binders such as are elevation Gerare, as a binder, Guagamu, methylcellulose, carboxymethyl Chino receptacle Honoré loin, nitro cell Honoré loin, water 'I 1 production cell Honoré loin ether Honoré And at least one selected from the group consisting of polyethylene glycol.
- Suitable gas generating agents include gas containing 5-aminotetrazole and guanidine nitrate as nitrogen-containing organic compounds, strontium nitrate and ammonium perchlorate as inorganic compounds, molybdenum trioxide as a self-igniting catalyst, and guar gum as a binder. Agent. More preferably, 10 to 30% by mass of 5-aminotetrazole as a nitrogen-containing organic compound, 15 to 35% by mass of guanidine nitrate, and 10 to 30% by mass of strontium nitrate as an inorganic compound.
- a method for producing these gas generating agents 3 will be described. Quantitatively measure each component of gas generating agent 3. After weighing, mix each component thoroughly with a V-type mixer. 10 to 30% by weight of water is added to the mixture and further mixed. The wet mixture is kneaded with a kneader to obtain a sticky mass. This is formed into a desired shape by a vacuum extruder. This is dried at 60 ° C. for 15 hours and then at 100 ° C. for 5 hours to obtain a desired gas generating agent 3. Further, smokeless explosives conventionally used can also be favorably used as the gas generating agent 3. The effects of the gas generator 1 according to the above-described embodiment will be described below.
- the gas generator 1 can be formed by caulking at a single point because caulking is performed by caulking the protruding portions 23 of the two. Compared to the conventional example that requires caulking at two places, such as the holder and the igniter, and the holder and the first cup, it is possible to securely fix it with a simple structure.
- the gas generating agent 3 accommodated in the first cup 2 is an O-ring that is pushed between the second forceps 12 of the igniter 4 and the enlarged skirt portion 2c of the first cup 2. In 19 it will be located in a closed space. As described above, the gas generating agent 3 accommodated in the first forceps 2 is hermetically sealed by the seal at one place, and no outside air enters from the igniter 4 side. Sealability is improved.
- the second cup 12 of the igniter 4 is fitted into the first cup 2 and both are in close contact, so that the first cup 2 is also supported by the igniter 4, Even if the cup 2 is elongated in the axial direction as shown in the figure, it is stable against external forces and the like.
- the embodiment of the present invention is not limited to the above, and may be modified as follows, for example.
- a hermetic seal type as shown in FIG. 2 is advantageous in that it expands in the radial direction and does not extend in the axial direction, but an ignition ball as shown in FIG. It may be of a formula.
- FIG. 3 two pins 3 2 and 3 2 protrude from the embolus 3 1, and an electric bridge plug 3 3 is attached to the tip of the two pins 3 2 and 3 2.
- An ignition ball 34 is formed around it.
- the second cup 35 is attached to the plug 31 so that the ignition ball 34 comes into contact with the igniting agent 36 in the second cup 35 to form an ignition ball type igniter.
- the fixing of the first cup 2 and the igniter 4 by the holder 5 is preferably performed by caulking.
- caulking There is no particular limitation on the means of joint fastening other than caulking as long as it can be fixed stably.For example, by screwing a cap nut-shaped thing into the holder, the first cup 2 and the igniter 4 are attached to the holder 5. They may be fastened together.
- the sealing member is not particularly limited as long as it has a sealing property.
- the O-ring 19, the first cup 2 is made by baking rubber or the like in an O-shape, Examples thereof include a silicone adhesive and an epoxy adhesive.
- FIG. 4 shows an example of the gas generator according to the present invention used for the 10 cc bomb test and the specifications of the conventional gas generator used for the seat belt pretensioner.
- the gas generator according to the present invention is different from a conventional gas generator.
- the amount of gas generating agent is the same as that of the gas generator used in the conventional seat belt pretensioner.
- a pressure measurement pump made of a material such as robust stainless steel is used for the lOcc bomb test.
- the gas generator is attached to the bomb jig provided on this pressure measurement bomb.
- a jig which is larger by 0.2 to 0.4 mm than the outer diameter of the cup portion of the gas generator is used.
- this gas generator is connected to the generation of a constant current pulse with an ignition current cable, and an ignition current (0.8 A X 2 ms) is supplied to activate the gas generator.
- the pressure of the combustion gas from the gas generator is measured by a measuring instrument such as an oscilloscope via a pressure sensor provided in the combustion chamber.
- the output of the gas generator is measured in this way. The results are shown in FIG.
- the gas generator according to the present invention can be reduced in size as compared with the conventional gas generator of the related art, and even if the same amount of gas generating agent is used, the cylinder is assumed to have the same size. It can be seen that since the inner diameter of the bomb jig can be reduced, high output (high maximum generated pressure) can be obtained. Industrial applicability
- the structure can be simplified by sharing the structure for fixing the igniter and the cup to the holder, and the sealing performance is improved. It works.
- the gas generator according to the present invention has a high output because the cylinder inner diameter of the vehicle safety device used can be made smaller than the conventional gas generator even with the same gas generating agent amount. (High maximum generated pressure).
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Automotive Seat Belt Assembly (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02769601A EP1396394A4 (en) | 2001-05-15 | 2002-05-15 | GAS PRODUCERS |
JP2002589311A JPWO2002092400A1 (ja) | 2001-05-15 | 2002-05-15 | ガス発生器 |
US10/477,265 US20040160046A1 (en) | 2001-05-15 | 2002-05-15 | Gas generator |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001-144135 | 2001-05-15 | ||
JP2001144135 | 2001-05-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002092400A1 true WO2002092400A1 (fr) | 2002-11-21 |
Family
ID=18990135
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/004684 WO2002092400A1 (fr) | 2001-05-15 | 2002-05-15 | Generateur de gaz |
Country Status (6)
Country | Link |
---|---|
US (1) | US20040160046A1 (ja) |
EP (1) | EP1396394A4 (ja) |
JP (1) | JPWO2002092400A1 (ja) |
CN (1) | CN1509240A (ja) |
CZ (1) | CZ20033416A3 (ja) |
WO (1) | WO2002092400A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7161790B2 (en) | 2002-12-26 | 2007-01-09 | Honda Motor Co., Ltd. | Ignition device for bus connection |
WO2020149399A1 (ja) * | 2019-01-18 | 2020-07-23 | 日本化薬株式会社 | ガス発生器 |
WO2021039328A1 (ja) * | 2019-08-30 | 2021-03-04 | 株式会社ダイセル | 点火器保持構造 |
WO2022168795A1 (ja) * | 2021-02-04 | 2022-08-11 | 株式会社ダイセル | 点火器組立体、及びガス発生器 |
US12134365B2 (en) | 2019-01-18 | 2024-11-05 | Nippon Kayaku Kabushiki Kaisha | Gas generator |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4907931B2 (ja) * | 2005-09-15 | 2012-04-04 | 日本化薬株式会社 | ガス発生器 |
DE102006002435A1 (de) * | 2006-01-12 | 2007-07-26 | Takata-Petri Ag | Verfahren zur Herstellung eines Gasgenerators und mittels des Verfahrens hergestellter Gasgenerator |
CN101121396B (zh) * | 2006-08-09 | 2010-05-12 | 比亚迪股份有限公司 | 气体发生器用电点火管及其发火方法 |
DE102007057551B4 (de) * | 2007-11-29 | 2011-11-24 | Diehl Bgt Defence Gmbh & Co. Kg | Miniaturisiertes Kraftelement |
JP5381932B2 (ja) * | 2010-03-02 | 2014-01-08 | 豊田合成株式会社 | ガス発生装置 |
JP5450306B2 (ja) * | 2010-07-29 | 2014-03-26 | 株式会社ダイセル | ガス発生器 |
CZ22999U1 (cs) * | 2011-11-02 | 2011-11-28 | Indet Safety Systems A. S. | Výkonný iniciátor pro vysoké navážky pyrotechnické slože |
DE102012010608A1 (de) * | 2012-05-16 | 2013-11-21 | Trw Airbag Systems Gmbh | Anzünder und Verfahren zur Herstellung eines Anzünders für einen Gasgenerator |
CN110530605B (zh) * | 2019-08-23 | 2021-07-13 | 南京理工大学 | 一种水下航行器排气实验装置 |
CN114407824B (zh) * | 2021-12-14 | 2022-12-02 | 均胜汽车安全系统(长兴)有限公司 | 一种兼具传火和点爆功能点火管的气体发生器 |
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- 2002-05-15 CN CNA028101235A patent/CN1509240A/zh active Pending
- 2002-05-15 US US10/477,265 patent/US20040160046A1/en not_active Abandoned
- 2002-05-15 WO PCT/JP2002/004684 patent/WO2002092400A1/ja not_active Application Discontinuation
- 2002-05-15 CZ CZ20033416A patent/CZ20033416A3/cs unknown
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7161790B2 (en) | 2002-12-26 | 2007-01-09 | Honda Motor Co., Ltd. | Ignition device for bus connection |
WO2020149399A1 (ja) * | 2019-01-18 | 2020-07-23 | 日本化薬株式会社 | ガス発生器 |
JP2020116968A (ja) * | 2019-01-18 | 2020-08-06 | 日本化薬株式会社 | ガス発生器 |
JP7266412B2 (ja) | 2019-01-18 | 2023-04-28 | 日本化薬株式会社 | ガス発生器 |
US12134365B2 (en) | 2019-01-18 | 2024-11-05 | Nippon Kayaku Kabushiki Kaisha | Gas generator |
WO2021039328A1 (ja) * | 2019-08-30 | 2021-03-04 | 株式会社ダイセル | 点火器保持構造 |
JP2021037793A (ja) * | 2019-08-30 | 2021-03-11 | 株式会社ダイセル | 点火器保持構造 |
WO2022168795A1 (ja) * | 2021-02-04 | 2022-08-11 | 株式会社ダイセル | 点火器組立体、及びガス発生器 |
JP7553375B2 (ja) | 2021-02-04 | 2024-09-18 | 株式会社ダイセル | 点火器組立体、及びガス発生器 |
Also Published As
Publication number | Publication date |
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US20040160046A1 (en) | 2004-08-19 |
EP1396394A1 (en) | 2004-03-10 |
JPWO2002092400A1 (ja) | 2004-08-26 |
CZ20033416A3 (en) | 2004-04-14 |
CN1509240A (zh) | 2004-06-30 |
EP1396394A4 (en) | 2004-12-08 |
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