CN1074367C - air bag gas generator - Google Patents
air bag gas generator Download PDFInfo
- Publication number
- CN1074367C CN1074367C CN96180486A CN96180486A CN1074367C CN 1074367 C CN1074367 C CN 1074367C CN 96180486 A CN96180486 A CN 96180486A CN 96180486 A CN96180486 A CN 96180486A CN 1074367 C CN1074367 C CN 1074367C
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- CN
- China
- Prior art keywords
- gas
- ignition device
- booster explosive
- accommodating chamber
- container
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
An airbag inflator comprising: a housing; an ignition device accommodating chamber formed in the housing; an ignition device installed in the ignition device accommodating chamber; a gas generating device; and a cooling and purification device. Wherein the ignition device comprises an explosive transfer container and an igniter, the explosive transfer container is provided with a cup body for containing the explosive transfer and a cover for sealing the cup body. In which gas generated by a gas generating device is introduced into an airbag, thereby protecting an occupant from an impact. The booster container includes a cup body portion and a lid portion, the bottom portion and the lid portion of the cup body portion being outwardly bent to form outwardly convex surfaces, and the container being elastically fixed between a top wall portion of the ignition device accommodating chamber and the igniter.
Description
The present invention relates to an air bag gas generator and impacted, particularly the structure of the ignition device of gas generator with the protection occupant.
Fig. 1 is the section drawing of the embodiment of a gas generator.Fig. 2 is the section drawing of the booster explosive container of gas generator.Fig. 3 is the section drawing of a traditional gas generator.In these accompanying drawings, reference number 1 is represented discharge orifice; 2: housing; 3: the ignition device accommodating chamber; 6: firing unit; 7: the booster explosive container; 8: gas generant; 10: cooling system conditioner; 11: filter; 12: booster explosive; 19: one cups; 20: one lids; 24: one top wall portions; With 25: one bottoms.
The example of traditional air bag gas generator is shown in Fig. 3.This gas generator comprises: a housing 31 has a gas discharge outlet 30; One igniting device accommodating chamber 32 is positioned at the core of housing 31; One igniting device 33 is installed in the ignition device accommodating chamber 32; One cartridge case 34 comprises a gas generating unit, produces the gas generant of gas during promptly by ignition device, and cooling and clean-up device, and promptly cooling system conditioner 35 and filter 36 are used to cool off and purify the gas that produces.
Ignition device 33 comprises a booster explosive container 38, and it comprises booster explosive 37 and firing unit 39, and firing unit 39 is lighted booster explosive 37 by a signal excitation.
When a sensor (not shown) detects one when impacting, sensor signal is sent to firing unit 39, and it is energized and lights booster explosive 37 then.When lighting booster explosive, produce High Temperature High Pressure flame, this flame enters combustion chamber 41 by opening 40, and the wall of cartridge case 34 breaks, and gas generant then ignites.Then, gas generant burning produces gas, and the through port from the combustion chamber cup 42 that forms combustion chamber enters coolant filtration device chamber 43 then.Gas is cooled and removes residue of combustion during by cooling system conditioner 35.When gas when the filter 36, remaining residue of combustion is further removed, and the gas with clean of cooling flows through gas discharge outlet 30 and enters the air bag (not shown).The gas swelling gasbag that flows into forms air cushion between occupant and rigid structure.
In the air bag gas generator that uses in automobile, part is assembled together.For example, booster explosive container and firing unit are installed in the igniter device accommodating chamber, make them contact with each other.
Because can be gapped between the tolerance of part itself and the stack-mounted error part.For example the booster explosive container may move in this gap or rum point firearm and damaging.
In order to prevent that inner body need be fixed because of the contacting of vibration inner body displacement or disengaging and correlated parts.Therefore, use cushion.
In above-mentioned traditional gas generator, a pad 45 is installed in booster explosive container 38 and forms between the cannulated threaded part 44 of ignition device accommodating chamber 32.This pad 45 makes booster explosive container 38 flexibly be pressed on the firing unit 39, prevents moving of booster explosive container 38, and prevents booster explosive container 38 rum point firearms 39.
When the automobile that air bag gas generator is installed caught fire, gas generator was heated, and caused that its inside reaches hundreds of degree.Under this high temperature, gas generant in the gas generator and booster explosive spontaneous combustion, housing can destroy, and the part of destruction can disperse out.
For preventing this situation, automotive ignition material (AIM) 23 is installed in the booster explosive container, as shown in Figure 2.The burning-point of AIM is low, can light before gas generant and booster explosive spontaneous combustion.This AIM lights the burning that guarantees booster explosive and gas generant, thereby prevents its spontaneous combustion and damage housing.AIM passes to AIM near the outer wall setting of housing well with the heat that guarantees the gas generator outside.
Traditional gas generator need be at the pad between booster explosive container and the cannulated threaded part, and this has increased the quantity and the stack-mounted time of part.
Pad between booster explosive container and cannulated threaded part hinders the conduction of heat, and the heat that hinders the gas generator outside is delivered to AIM, and this has postponed the point of ignition of AIM.
Therefore the purpose of this invention is to provide a new-type air bag gas generator, it has solved the problem of above-mentioned traditional air bag gas generator.
Comprise according to air bag gas generator of the present invention: a housing has gas discharge outlet; One igniting device accommodating chamber is formed on the core of housing; One igniting device is installed in the ignition device accommodating chamber; One gas generating unit is lighted by ignition device and to be produced gas; And one the cooling and clean-up device, be used to cool off the gas that produces with the Purge gas generating means, wherein ignition device comprises a booster explosive container and a firing unit, and the booster explosive container has cup that holds booster explosive and the lid that seals cup, and firing unit is lighted booster explosive by a signal excitation; Wherein the gas that is produced by gas generating unit owing to impact is introduced an air bag, thereby the protection occupant avoids impacting; Wherein the booster explosive container comprises a cup section and a cap, and the bottom of cup section or cap form cambered outwards surface to excurvation, and container flexibly is fixed between the top wall portion and firing unit of ignition device accommodating chamber.
The booster explosive container that is used for this gas generator, the bottom of lid or cup has protruding surface.This protruding bottom surface can elastic deformation when being under pressure.The distortion of this nonreentrant surface applies elastic force to the top wall portion and the firing unit of ignition device accommodating chamber.Like this, the booster explosive container flexibly is fixed between the top and firing unit of ignition device accommodating chamber.
Because above-mentioned structure, the present invention can cancel the pad that is installed between booster explosive container and the ignition device accommodating chamber top wall portion.This helps reducing the quantity and the stack-mounted time of part.
In addition,, improved heat conduction, made the heat in the gas generator outside can pass to AIM effectively, thereby fire in proper time point owing to cancelled the pad that is installed between booster explosive container and the ignition device accommodating chamber top wall portion.This can guarantee safety.
A preferred embodiment of the present invention is described with reference to the accompanying drawings.
Fig. 1 is the section drawing of gas generator of the present invention.This gas generator comprises: a housing 2 has gas discharge outlet 1; One igniting device accommodating chamber 3 is formed on the core of housing 2; One combustion chamber 4 is along the periphery formation of ignition device accommodating chamber 3; One coolant filtration device chamber 5 forms along combustion chamber 4 peripheries; One igniting device, promptly a firing unit 6 and a booster explosive container 7 are installed in the ignition device accommodating chamber 3; One cartridge case 9 is installed in the combustion chamber 4, wherein loads gas generant 8, and gas generant 8 is lighted by ignition device, and produces gas; And cooling system conditioner 10 and filter 11, be installed in the coolant filtration device chamber 5, with the burning gases that produce in cooling and the purification cartridge case.
Ignition device accommodating chamber 3 is formed by central tube portion 13.Combustion chamber 4 is formed by central tube portion 13 and the fire ring 14 outside central tube portion.Coolant filtration device chamber 5 forms by fire ring 14 with around the outer wall section 15 in fire ring 14 outsides.Coolant filtration device chamber 5 is divided into upper chamber and lower chamber by a baffle plate 16.
One passage 17 is arranged between ignition device accommodating chamber 3 and combustion chamber 4, be used for the flame that ignition device accommodating chamber 3 produces is delivered to combustion chamber 4.The gas through port 18 that a plurality of circumferential formation along fire ring 14 are arranged between combustion chamber 4 and the coolant filtration device chamber 5, the burning gases that are used to combustion chamber 4 is produced pass through.In addition, the gas discharge outlet 1 that has a plurality of edges circumferentially to form between coolant filtration device chamber 5 and the air bag.
Fig. 2 is mounted in the section drawing of the booster explosive container 7 in the gas generator of the present invention.Booster explosive container 7 constitutes by cup 19 is combined with lid 20, and they are made by flake aluminum.
Filling seed materials in the cup 19 of booster explosive container 7, it is 20 airtight with covering, and the flange 22 of lid presses and fixing cup flange 21.Cup flange and lid flange also can be by adhesive agents, and heat seal and ultra-sonic welded combine.
Filling booster explosive 12 and AIM23 (auto ignition material) in the booster explosive container 7.It is distolateral that AIM is positioned at the sealing of cup 19, promptly is positioned at roof 24 1 sides of ignition device accommodating chamber.
Outside nonreentrant surface is formed when lid 20 is installed on the cup 19 on bottom 25.
When booster explosive container 7 and firing unit 6 were assembled in the gas generator, booster explosive container 7 at first inserted in the ignition device accommodating chamber 3.The closed end of the cup of booster explosive container is with after the top wall portion 24 of ignition device accommodating chamber contacts, and firing unit 6 inserts, and the head 26 of firing unit is pressed at the bottom of the lid of booster explosive container 25, up to the flange 27 of firing unit 6 and step part 28 engagements of central tube portion 13.At this moment, the flanging portion 29 of central tube portion 13 is bent.
The lid end 25 elastic deformation when being subjected to the pressure of firing unit head 26.The distortion of bottom 25 produces elastic force to the top wall portion 24 and the firing unit 6 of ignition device accommodating chamber.Like this, booster explosive container 7 flexibly is retained between the top and firing unit of ignition device accommodating chamber.
In the gas generator of said structure, when the sensor (not shown) detected an impact, its signal was sent to firing unit 6, and firing unit is energized and lights booster explosive 12 to produce thermal-flame.Flame enters combustion chamber 4 by passage 17, makes the wall of cartridge case break and lights the gas generant 8 that is contained in the cartridge case.The burning of gas generant 8 produces gas, evenly enters coolant filtration device chamber 5 by gas through port 18.Gas is by cooling system conditioner 10, and gas is cooled therebetween, and residue of combustion is further removed.When gas passed through filter 11, all the other residue of combustions were removed.Become cooling and clean burning gases enter the air bag (not shown) by gas discharge outlet 1, and swelling gasbag fills up to form one between occupant and rigid structure, thereby prevents that the occupant is not hit.
Claims (1)
1. an air bag gas generator comprises:
One housing has gas discharge outlet;
One igniting device accommodating chamber is formed on the core of housing;
One igniting device is installed in the ignition device accommodating chamber;
One gas generating unit is lighted by ignition device and to be produced gas; And
One cooling and clean-up device is used to cool off the gas that produces with the Purge gas generating means;
Wherein, ignition device comprises a booster explosive container and a firing unit, and the booster explosive container has cup that holds booster explosive and the lid that seals cup, and firing unit is lighted booster explosive by a signal excitation;
The gas that is produced by gas generating unit owing to impact is introduced into an air bag, thereby the protection occupant avoids impacting;
The booster explosive container comprises a cup section and a cap, and the bottom of cup section or cap form cambered outwards surface to excurvation, and container flexibly is fixed between the top wall portion and firing unit of ignition device accommodating chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96180486A CN1074367C (en) | 1996-10-29 | 1996-10-29 | air bag gas generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96180486A CN1074367C (en) | 1996-10-29 | 1996-10-29 | air bag gas generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1234776A CN1234776A (en) | 1999-11-10 |
| CN1074367C true CN1074367C (en) | 2001-11-07 |
Family
ID=5127922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96180486A Expired - Lifetime CN1074367C (en) | 1996-10-29 | 1996-10-29 | air bag gas generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1074367C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006002435A1 (en) * | 2006-01-12 | 2007-07-26 | Takata-Petri Ag | Method for producing a gas generator and gas generator produced by the method |
| CN105818779A (en) * | 2016-04-20 | 2016-08-03 | 芜湖金鹏汽车部件有限公司 | Intelligent gas generation device special for automobile safety air bag |
| CN111516633A (en) * | 2020-05-15 | 2020-08-11 | 湖北航鹏化学动力科技有限责任公司 | Pyrotechnic gas generator for safety air bag |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0478745A (en) * | 1990-07-19 | 1992-03-12 | Nippon Oil & Fats Co Ltd | Gas generator |
| JPH07112651A (en) * | 1993-10-19 | 1995-05-02 | Nissan Motor Co Ltd | Car instrument panel structure |
| CN1124019A (en) * | 1994-01-27 | 1996-06-05 | 大赛璐化学工业株式会社 | Gas generator for air bag |
-
1996
- 1996-10-29 CN CN96180486A patent/CN1074367C/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0478745A (en) * | 1990-07-19 | 1992-03-12 | Nippon Oil & Fats Co Ltd | Gas generator |
| JPH07112651A (en) * | 1993-10-19 | 1995-05-02 | Nissan Motor Co Ltd | Car instrument panel structure |
| CN1124019A (en) * | 1994-01-27 | 1996-06-05 | 大赛璐化学工业株式会社 | Gas generator for air bag |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1234776A (en) | 1999-11-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Osaka Japan Patentee after: Daicel Chem Address before: Osaka Japan Patentee before: Daicel Chemical Industries Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20011107 |
|
| EXPY | Termination of patent right or utility model |