CN100417553C - Double-stage ignition type safety airbag gas generator - Google Patents
Double-stage ignition type safety airbag gas generator Download PDFInfo
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- CN100417553C CN100417553C CNB200510021482XA CN200510021482A CN100417553C CN 100417553 C CN100417553 C CN 100417553C CN B200510021482X A CNB200510021482X A CN B200510021482XA CN 200510021482 A CN200510021482 A CN 200510021482A CN 100417553 C CN100417553 C CN 100417553C
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Abstract
The two-stage igniting safety airbag air generator in improved structure has two completely independent igniting and air generating devices, one shared filter and one air exhauster, as well as one increased spring between the right and left closure plates to reduce air escape speed and instantaneous impact force for protecting the safety of the rider more effectively. The air generator may fill the airbag for the first time and the second time in different modes, and this results in mild filling and raised protecting effect.
Description
[technical field]
The present invention relates to a kind of gas generator that is used for safety air bag.
[background technology]
At present, safety air bag has been widely used on the various vehicles, has made very big contribution for reducing personal casualty and alleviating in the traffic accident personnel's extent of injury, and has become the standard configuration that becomes car gradually.In order to improve the protection efficient of safety air bag to greatest extent, safety air bag is progressively to variation, intelligent direction development.
Traditional safety air bag is that mesosomatous people has the better protect effect to major part by M-F statistics design-calculated among most people's average condition parameter (as height, body weight etc.) and the person for driving a car.As shown in Figure 1, be present electrode ignition formula front-row occupant air-cushion inflator generally to be used.It mainly is made up of base 1, housing 2, jam 3, filter 4, gas generant composition in accordance 5, expansion combustion medicine 6, plug 7, seal strip 8, building paper 9, igniting primer 10, igniting primer base 11, squib 12, O type groove 13, short circuit device 14, seal cup 15.When automobile generation head-on crash; surpass predefined outburst threshold values as impact strength; then ECU gives ignition tube 12 energisings; the flame ignition that produces after ignition tube 12 is got angry expands combustion medicine 6; light gas generant composition in accordance 5 after breaking through building paper 9 after expansion combustion medicine 6 is got angry; produce a large amount of gases after gas generant composition in accordance 5 is got angry and pour the nylon airbag, the nylon airbag of turgor is isolated occupant and automotive trim, thereby realizes the protection to the occupant.Just finish the chemical reaction of aerogenesis after this gas generator is once lighted a fire, thereby finished its mission.
Along with the further research of people to air bag for protection mechanism, find that the impulsive force of this safety air bag effect is very big, easily the occupant is caused damage, particularly bigger to children and women of short and small stature damage, sometimes or even fatal.For avoiding the generation of this accident, car production producer has increased a kind of switch to the safety air bag of the front-seat front passenger's seat on the car specially, is commonly called as to be " safety air bag switch ".If children or women of short and small stature are sitting in the position of front-seat front passenger's seat; then must close " safety air bag switch "; even the front-row occupant side airbag also can not worked in traffic accident; but; this comes down to have wasted this safety convenience instrument of safety air bag, and does not take the other technologies means that protection is provided to the personnel that are sitting in front-seat front passenger's seat.
For finishing this difficult situation, technical personnel is always in effort.Along with development of technology and scientific research personnel's in-depth study, invented the type of releiving, the intelligent safety air bag of states such as size that to determine speed, the expansion of air-bag deployment according to situations such as occupant's stature height, body weight, seat appearances finally.The gas generator of supporting this safety air bag arises at the historic moment, the front-seat front passenger's seat air-cushion inflator of Here it is two-stage ignition type.The front-row occupant air-cushion inflator of double-stage ignition as shown in Figure 2.Comprise ignition part 16, cavity liner 7, gas generant composition in accordance 18, closure plate seat 19, filter 20, dividing plate 21, housing 22, the producer tail that this gas generator is similar to Fig. 1 forms being combined in together of tail.The work characteristics of this producer is can light a fire respectively or igniting simultaneously in two ends.Volume for fear of product is excessive, guarantee that again gas production rate is enough, people generally adopt the mode that reduces the two ends explosive load to make double-stage ignition type gas generator shown in Figure 2 at present, and two-stage staggers several milliseconds and lights a fire to a few tens of milliseconds, make airbag can realize twice inflation, slowed down once inflation and had the shortcoming that inflation is too fast, impulsive force is excessive.
Obviously, existing double-stage ignition type gas generator is to be developed by single-stage ignition type gas generator, and it has two covers independence and essentially identical ignition system fully, will have generally difference also only is how many doses of gas generant composition in accordance has difference.
[summary of the invention]
Purpose of the present invention, provide a kind of simple in structure, cost is low, more help protecting occupant's double-stage ignition type front passenger's seat air-cushion inflator.
For achieving the above object, the present invention proposes a kind of double-stage ignition type safety airbag gas generator, two independently igniting and aerogenesis apparatus, filtering installations about comprising, and described left and right igniting and aerogenesis apparatus are divided into described filtering installation two ends; Described filtering installation comprises left closure plate seat 29 and right closure plate seat 39, left closure plate 31 and right closure plate 41, filter 32, and described filter is a hollow, is limited between described left closure plate seat 29 and the right closure plate seat 39, the inner cavity that forms; Described left closure plate seat offers left closure plate hole in filter hollow correspondence position, and described left closure plate area is slightly larger than described left closure plate hole area, is closed in right side, described left closure plate hole; Described right closure plate seat offers right closure plate hole in filter hollow correspondence position, and described right closure plate area is slightly larger than described right closure plate hole area, is closed in left side, described right closure plate hole.
Above-mentioned gas generator also comprises spring 33, and described both ends of the spring connects described left closure plate, right closure plate respectively, and forces in described left closure plate, right closure plate under the state of nature respectively, presses the described left closure plate of sealing hole, right closure plate hole respectively.
Above-mentioned gas generator, also comprise left packing seal 30 and right packing seal 40, described left packing seal is arranged between described left closure plate seat and the left closure plate, be used to strengthen the sealing between described left closure plate seat and the left closure plate, described right packing seal is arranged between described right closure plate seat and the right closure plate, is used to strengthen the sealing between described right closure plate seat and the right closure plate.
Owing to adopted above scheme, brought following beneficial effect:
Double-stage ignition type safety airbag gas generator of the present invention includes two covers fully independently igniting and aerogenesis apparatus and a cover filter and an exhaust gear only arranged, and simple in structure, cost is low.Because set up spring between the left and right closure plate, gas generator produces the moment that a large amount of gases are washed closure plate open, the antagonistic force of spring, the speed that can slow down gas evolution reduces the instant impact that airbag ejects, and is more conducive to protect occupant's personal safety.Two cover ignition devices and aerogenesis apparatus can act on separately, can't cause that another set of device is excited; Also can two covering devices simultaneously or the igniting of staggering the time excite and act on; The used gas producing medicinal of two covering devices can equivalent, also can inequality; Therefore utilize this gas generator can realize in many ways to airbag once or defuelling; thereby can realize according to the protection needs of automobile front-row occupant and inflate, make the protection effect of safety air bag better, secondary action is littler in the mode of more releiving than common air bag.
[description of drawings]
Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.
The air-cushion inflator structural representation of the common one pole igniting of Fig. 1,
The structural representation of the air-cushion inflator of the common double-stage ignition of Fig. 2,
Fig. 3 structural principle scheme drawing of the present invention,
The mode of operation scheme drawing of Fig. 4 left end separated ignition of the present invention,
The mode of operation scheme drawing of Fig. 5 right-hand member separated ignition of the present invention,
Fig. 6 left end of the present invention, right-hand member are lighted a fire simultaneously or are staggered the time the ignition operation scheme drawing.
Wherein, 26 left side ignition parts, 36 right parts, 27 left cavity liners, 37 right cavity liners, 28 gas generant composition in accordance, 29 left closure plate seats, 39 right closure plate seats, 31 left closure plates, 41 right closure plates, 32 filters, 33 springs, 35 housings, 30 left packing seals, the 40 right packing seals of getting angry.
[specific embodiment]
Embodiment one: this example is a preferred embodiment, as shown in Figure 3, comprise left side ignition part 26 and right part 36, left cavity liner 27 and right cavity liner 37, gas generant composition in accordance 28, left packing seal 30 and right packing seal 40, left closure plate seat 29 and right closure plate seat 39, left closure plate 31 and right closure plate 41, filter 32, spring 33, the housing 35 of getting angry; Filter two ends are respectively by left closure plate seat, right closure plate seat limits, be fixedly set in the housing, spring is arranged in the filter, left side closure plate, right closure plate is connected in the two ends of spring, and be pressed on left closure plate seat under the state of nature respectively, on the right closure plate seat, left side cavity liner, right cavity liner respectively with left closure plate seat, right closure plate seat is affixed, left side ignition part, right ignition part is arranged at the left side of housing respectively, right two ends, gas generant composition in accordance are filled in by left side ignition part, left side cavity liner, housing surrounds in the left cavity that forms and by getting angry part in the right side, right cavity liner, housing surrounds in the right cavity that forms.Left side packing seal is arranged on left closure plate seat or the left closure plate, is used to strengthen the sealing between described left closure plate seat and the left closure plate, and right packing seal is arranged on right closure plate seat or the right closure plate, is used to strengthen the sealing between right closure plate seat and the right closure plate.
Can see by Fig. 3, the producer of this structure be actually by about two covers independently igniting and aerogenesis apparatus constitute a but shared sets filtering device.This filtering installation comprises filter 32 and left closure plate 31, right closure plate 41, left packing seal 30, right packing seal 40, left closure plate seat 29, right closure plate seat 39, and usual left and right two closure plates withstand tightly by spring 33 and lean on mutually with left and right closure plate seat.
This producer is when the left end separated ignition, and closure plate 31 back gases in the gas compression of a generation left side enter filter 32 after rushing out in the left closure plate hole, and right closure plate 41 then tightly is pressed on the right closure plate seat 39.Because closure plate is isolated flame, makes the medicament of right-hand member can not ignited by fire; Same, when the right-hand member separated ignition, left end is not lighted yet.When left end igniting earlier, right-hand member is representative type double-stage ignition type gas generator when lighting a fire again; When left and right end is lighted a fire simultaneously, be equivalent to single-stage ignition type gas generator again.
Above-mentioned sparking mode is listed as follows:
| Sequence number | Firing sequence | Mode of operation | Applicable scope | Diagrammatic sketch |
| 1 | The left end separated ignition | Weak breath amount single-stage ignition type producer | Be applicable to short and small occupant | As shown in Figure 4 |
| 2 | The right-hand member separated ignition | Weak breath amount single-stage ignition type producer | Be applicable to short and small occupant | As shown in Figure 5 |
| 3 | Left end is igniting earlier, the right-hand member after ignition | The double-stage ignition type producer | Be applicable to most people | As shown in Figure 6 |
| 4 | Right-hand member is igniting earlier, the left end after ignition | The double-stage ignition type producer | Be applicable to most people | Be similar to Fig. 6 |
| 5 | Left end and right-hand member are lighted a fire simultaneously | Atm number single-stage ignition type producer | Be applicable to the adult | Fig. 6 |
Therefore different as the explosive load of left end and right-hand member, then this structure can be made the bigger product of gas production rate variation range, applicable to the airbag of all size.
Claims (3)
1. double-stage ignition type safety airbag gas generator, two independently igniting and aerogenesis apparatus, filtering installations about comprising, described left and right igniting and aerogenesis apparatus are divided into described filtering installation two ends; It is characterized in that: described filtering installation comprises left closure plate seat (29) and right closure plate seat (39), left closure plate (31) and right closure plate (41), filter (32), described filter is a hollow, be limited between described left closure plate seat (29) and the right closure plate seat (39) the inner cavity that forms; Described left closure plate seat offers left closure plate hole in filter hollow correspondence position, and described left closure plate area is slightly larger than described left closure plate hole area, is closed in right side, described left closure plate hole; Described right closure plate seat offers right closure plate hole in filter hollow correspondence position, and described right closure plate area is slightly larger than described right closure plate hole area, is closed in left side, described right closure plate hole.
2. gas generator as claimed in claim 1, it is characterized in that: also comprise spring (33), described both ends of the spring connects described left closure plate, right closure plate respectively, and forces in described left closure plate, right closure plate under the state of nature respectively, presses the described left closure plate of sealing hole, right closure plate hole respectively.
3. gas generator as claimed in claim 1 or 2, it is characterized in that: also comprise left packing seal (30) and right packing seal (40), described left packing seal is arranged between described left closure plate seat and the left closure plate, be used to strengthen the sealing between described left closure plate seat and the left closure plate, described right packing seal is arranged between described right closure plate seat and the right closure plate, is used to strengthen the sealing between described right closure plate seat and the right closure plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510021482XA CN100417553C (en) | 2005-08-10 | 2005-08-10 | Double-stage ignition type safety airbag gas generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510021482XA CN100417553C (en) | 2005-08-10 | 2005-08-10 | Double-stage ignition type safety airbag gas generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1911712A CN1911712A (en) | 2007-02-14 |
| CN100417553C true CN100417553C (en) | 2008-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510021482XA Active CN100417553C (en) | 2005-08-10 | 2005-08-10 | Double-stage ignition type safety airbag gas generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102529874A (en) * | 2012-03-12 | 2012-07-04 | 浙江大学 | External air bag restraint system for automobile |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7712778B2 (en) * | 2007-10-29 | 2010-05-11 | Autoliv Asp, Inc. | Dual stage cylindrical inflator with outside to inside axial flow |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4590041A (en) * | 1984-11-21 | 1986-05-20 | Morton Thiokol, Inc. | Gas bag inflators |
| CN2223706Y (en) * | 1994-11-07 | 1996-04-03 | 钟延沁 | Safety air bag device for preventing automobiles from collision |
| US6000718A (en) * | 1997-03-06 | 1999-12-14 | Automotive Systems Laboratory, Inc. | End cap assembly for airbag inflator |
| CN1556760A (en) * | 2001-08-16 | 2004-12-22 | О | Compact multi-level inflator |
-
2005
- 2005-08-10 CN CNB200510021482XA patent/CN100417553C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4590041A (en) * | 1984-11-21 | 1986-05-20 | Morton Thiokol, Inc. | Gas bag inflators |
| CN2223706Y (en) * | 1994-11-07 | 1996-04-03 | 钟延沁 | Safety air bag device for preventing automobiles from collision |
| US6000718A (en) * | 1997-03-06 | 1999-12-14 | Automotive Systems Laboratory, Inc. | End cap assembly for airbag inflator |
| CN1556760A (en) * | 2001-08-16 | 2004-12-22 | О | Compact multi-level inflator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102529874A (en) * | 2012-03-12 | 2012-07-04 | 浙江大学 | External air bag restraint system for automobile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1911712A (en) | 2007-02-14 |
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