CN1721236A - Method for manufacturing multistage gas generator for air bag - Google Patents
Method for manufacturing multistage gas generator for air bag Download PDFInfo
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- CN1721236A CN1721236A CNA2005100848295A CN200510084829A CN1721236A CN 1721236 A CN1721236 A CN 1721236A CN A2005100848295 A CNA2005100848295 A CN A2005100848295A CN 200510084829 A CN200510084829 A CN 200510084829A CN 1721236 A CN1721236 A CN 1721236A
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Abstract
The invention discloses a method of making a multistage airbag gas generator. The generator comprises a cylindrical shell. The shell comprises a diffusion shell body including multiple air outlet openings on a cylindrical sidewall and a sealing shell body forming an inner space with the diffusion shell body. The generator also comprises multiple combustion chambers arranged in the shell used to contain gas generant and ignition devices arranged in each combustion chamber for igniting and combusting the gas generant; wherein, the shell is made up by friction welding to joint the diffusion shell body and the sealing shell body and the friction welding is made when the sealing shell body is fixed.
Description
The application is one and divides an application that the application number of corresponding female case is 00804365.5, and the applying date is on February 15th, 2000, and denomination of invention is " multistage gas generator for air bag and an airbag apparatus ", and the application people is a Daisel chemical industry Co., Ltd.
Technical field
The present invention relates generally to a kind of multistage gas generator for air bag and a kind of airbag apparatus that adopts this gas generator, and be particularly related to a kind of method of making multistage gas generator for air bag.
Background technology
A kind of gas-bag system, be installed in and comprise automobile on interior multiple vehicle, be intended to by means of a kind of when the vehicle at high speed collides by gas rapid inflatable air bag (capsule device) come the holding rider and bump against owing to inertia such as on the hard thing in the such car of control wheel, windscreen and come to harm so that prevent the rider.This gas-bag system generally comprises a gas generator, and started in response to the collision of vehicle and discharged gas, and an air bag, feed is gone into charge air conditioning.
Even people wish such gas-bag system rider's state (such as, sitting height is greatly or little, is adult or children etc.), give birth to appearance (such as, grip the posture of control wheel) etc. also can shield and sustain the rider safely when having nothing in common with each other.So, a kind of gas-bag system is proposed usually always, on the starting stage of starting, apply as far as possible little bump for the rider.Set forth to some extent in JP-A8-207696, US-A 4998751 and 4950458 at all gases producer among a kind of like this system.JP-A8-207696 proposes a kind of gas generator, one of them pilot burner two kinds of generation of gas agent capsules that ignite, so that gas takes place on two stages.US-A 4998751 and US-A 4950458 proposes a kind of gas generator, wherein places the starting that two combustion chambers are used for the control gaseous producer, so that because the flame of the expansion of gas generant and on two stages gas takes place.
Secondly, in JP-A 9-183359, and in DE-B 19620758, set forth a kind of gas generator, two combustion chambers that wherein store gas generant are provided with among the device shell and a pilot burner is configured among each combustion chamber, so that can regulate the triggering time limit of each pilot burner, thereby the output of adjustments of gas producer.
But, more than these common gas generators be not a kind of multistage gas generator for air bag, simple in structure and be easy to make, and can suppress the overall dimensions of container (device shell).
Summary of the invention
According to the present invention, a kind of method of making multistage gas generator for air bag is provided, producer has a cylindrical shape device shell, the device shell comprises a diffusion housing, have many exhausr ports that are formed on the cylinder side wall, a casing forms an inner space with the diffusion housing; Be arranged on the many combustion chambers that are used to put gas generant among the device shell; Ignition device is arranged on and is used to ignite in each combustion chamber and the burning gases propellant, and wherein the device shell is by engaging the diffusion housing with friction welding and casing is made, and friction welding is carried out when casing is fixed.
Preferably, one within it the side inner shell that is formed with a combustion chamber be arranged among the device shell, and inner shell is engaged in casing by friction welding when inner shell is provided with prejudicially with respect to device shell central axis, perhaps friction welding is carried out when casing is fixed.
Preferably, casing comprises that a flange portion is used for gas generator is installed on a module housing, and flange is formed with a localization part, and casing is by being fixed with localization part location casing.
The invention provides a kind of multistage gas generator for air bag, wherein, on the starting stage of starting, gas generator is given the passenger with as far as possible little bump by starting, and (such as sitting height is to be greatly little according to passenger's physique, adult or children) and the variation of sitting posture (such as being close to control wheel), the starting output of gas generator and the time limit that output increases can at random be regulated so that shield and sustain the passenger safely, and gas generator is made because of simple in structure being easy to, the overall dimensions of container (device shell) can be suppressed, and last, the volume ratio of each combustion chamber can at random be regulated.
The invention is characterized in a kind of inner structure, specifically, a kind of can be furnished with the arrangement structure that suppresses the gas generator overall dimensions in the multistage gas generator for air bag of many combustion chambers and at random regulate each combustion chamber of each volume ratio of combustion chamber one in device shell inboard.
In other words, multistage pyrotechnic gas generator of the present invention has: a cylindrical shape device shell, and it comprises a diffusion housing, has many exhausr ports that are formed on the cylinder side wall, and a casing, forms an inner space with the diffusion housing; Many combustion chambers are used to put gas generant, are arranged among the cylindrical shape device shell; And ignition device, be arranged among each combustion chamber to ignite and the burning gases propellant, wherein, in the device shell, at least among each combustion chamber is arranged on the inboard of an inner shell that is provided with prejudicially with respect to device shell central axis, for the ignition device of each combustion chamber setting is provided with prejudicially with respect to device shell central axis, wherein inner shell is provided with a bore portions, and when bore portions was opened, gas can flow being formed between each combustion chamber in the inner shell inboard and the outside.
Secondly, in gas generator of the present invention, be provided with one and be communicated with eyelet, allow being interconnected between each combustion chamber.
One material (AIM) that ignites automatically because the heat that transmits and ignited and burn, can be arranged among any one among two combustion chambers.
The present invention also provides a kind of multi-stage gasbag device, comprising: aforesaid gas generator; One signal output apparatus that ignites, be furnished with as many with each pilot burner of ignition device, one promptly export each output that each energizing signal is given each pilot burner when bump; And many leads with adaptor union, each pilot burner and each output are connected to each other by each lead with adaptor union, and each adaptor union comprises device for limiting, is used for the exclusive connection mode between one of one of definite each adaptor union and each output.
Above gas generator can also comprise that a cylindrical shape filter is used for purifying and/or cooling triggers gas, one or two axial end surface of filter can be made for the bevelled end surface, on axial direction of extension, narrow down gradually and be an acute angle with respect to the interior angle on interior periphery surface, an and supporting part, be opposite to the inclined end portion surface of filter, can be arranged on (a kind of self-constriction formula fil) among the device shell.In the present invention, the major part of inner shell outer surface can be present in the gas generant in the inner shell outside and insert adiabatic layer in the middle of not needing by direct contact.Gas generant is contacted with and is communicated with the outer surface that eyelet is provided with the inner shell at place.One inner shell wallboard is present between first gas generant and another second gas generant of at first burning.Even first gas generant has burnt, second gas generant also will never take fire before starting one second pilot burner, and second gas generant is that starting second pilot burner burns before reaching an ignition temperature by the temperature at second gas generant owing to heat conduction.
After first gas generant was ignited, if gas generator stops and second gas generant that do not ignite, then second gas generant was ignited after about 10 seconds.
In the present invention, generally preferably, inner shell has drum, and its upper end is an osed top and its horizontal section is circular.The horizontal cross sectional geometry of inner shell can be made for multiple shape, such as rectangle and ellipse.But, in view of easy connection, wish the horizontal section of inner shell is made for annular arrangement.Inner shell is arranged among the device shell prejudicially with respect to device shell central axis.That is, inner shell among the device shell, be provided with so that the center of inner shell do not coincide with the center of device shell, and inner shell is provided with prejudicially with respect to cylindrical shape device shell.Therefore, even the aspect of device shell is oval basically, under the situation about departing from each other at the center of the center of aspect and inner shell, inner shell and device shell also depart from.In addition, the central axis of device shell stipulated according to the aspect of cylindrical body specially, even and the device shell has a flange is used for the device shell is installed on module, this flange is not considered when regulation device shell central axis yet.
The ignition device that is arranged in each combustion chamber comprises a pilot burner, by the telecommunications work song with the starting.Each pilot burner can be provided be centered in the device shell axially.The casing that constitutes the device shell can comprise a lasso and partly be used for fixing pilot burner, and pilot burner can be fixed in the lasso part.In the case, preferably all are included in that pilot burner all is fixed in an independent lasso part in each ignition device.This is because when casing was made to such an extent that comprise the lasso part, by in advance many pilot burners being fixed in the lasso part, these many pilot burners just can be fixed among the device shell so that constitute casing with independent single job, are convenient to manufacturing like this.
Be arranged on prejudicially that inner shell among the device shell has drum and inner shell comprises a bore portions, owing to the gas generant among one of each combustion chamber of burning is opened.Inner shell can be made for another shape as mentioned above.But, in view of being connected in casing easily, preferably planar cross-sectional is an annular arrangement.Inner shell makes gas to flow through and be formed on each combustion chamber in the inboard and outside of inner shell by opening bore portions.This bore portions can be by making many eyelets and by adopting each disrumpent feelings these eyelets of sealing to constitute on inner shell periphery wallboard.Opened by the gas generant that disrumpent feelings each eyelet of osed top can be specially be arranged among each combustion chamber of inner shell inboard by burning.Eyelet is because the burning gases propellant, is opened by breaking, peel off, burn out or throwing off disrumpent feelings such as the pressure that causes owing to the burning gases propellant.In addition, this can be by being achieved for inner shell configuration a kerf or by the thickness that reduces a part of inner shell.One covers plate can be arranged on the bore portions outside, and this covers plate and can prevent to be arranged on the flame that takes place among the combustion chamber in the inner shell outside and be contacted with bore portions.Bore portions can be made consequently just owing to the gas generant among one of each combustion chamber of burning is opened.
As mentioned above, inner shell is arranged among the device shell prejudicially with respect to device shell central axis, and the ignition device that is arranged among each combustion chamber is provided with prejudicially with respect to device shell central axis.Because this structure, might be suppressed to minimum to the size of device shell, and combustion chamber is at volume, it is maximum that the alerting ability of aspects such as layout can reach.That is, in the time of among two combustion chambers are formed on the device shell, by inner shell being set in the device shell prejudicially and forming one first combustion chamber and form one second combustion chamber on its outside on the inboard, the volume ratio of first and second combustion chambers can arbitrarily change by the volume that changes inner shell.At this moment, also be provided with prejudicially with respect to device shell central axis if be arranged on the pilot burner of the ignition device among each combustion chamber, the pilot burner that then is arranged among first combustion chamber will can not hinder the volume that increases second combustion chamber.Therefore, in the present invention, might make the alerting ability of first and second combustion chambers become maximum at aspects such as volumes.
Secondly, the invention provides a kind of multistage gas generator for air bag, in the combustion chamber of inner shell inboard, is furnished with the material (AIM) that ignites automatically, ignited because burning is arranged on the heat that gas generant took place among the combustion chamber in the inner shell outside and burnt, but also a kind of multistage gas generator for air bag is provided, the material (AIM) that wherein ignites automatically is included among the ignition device that is arranged in the interior side combusion chamber of inner shell.That is in most of the cases, when the multiple stage gas generator was started, all ignition devices were all by starting and the gas generant among institute's combuster is all burned.But, under certain starting conditions, have a kind of situation, one of the burning of wherein just respectively igniting device is had a mind to starting with the gas generant among the selected combustion chamber that burns.In the case, Yu Xia ignition device that is not started and gas generant can bring inconvenience when cleaning after a while or recovery.Therefore, preferably ignite after the gas generator and burn them in starting.So, by the material that ignites automatically (AIM) is set in combustion chamber and/or burning installation, even when gas generant among any one and/or ignition device in each combustion chamber not burned and stayed when getting off, also might since burning among another combustion chamber the heat that gas generant caused (heat of transmission) and ignite at a time limit place that postpones and burning gases take place and/or detonator.Therefore, equally in the present invention, among combustion chamber that is arranged on the inner shell both sides and/or ignition device, the material (AIM) that ignites automatically preferably is set, ignited because burning is arranged on the heat that gas generant took place in the combustion chamber in the inner shell outside and burnt.As the material that ignites automatically (AIM), preferential employing is compared with gas generant or transmission gunpowder with the lower temperature material that ignited.Gas generant is ignited by automatic detonator (AIM) after triggering gas generant.That is, be different from for the starting ability of adjustments of gas propellant and have a mind to the gas generant that ignites of starting time limit of delayed ignition device by the material that ignites the automatically gas generant that ignites.Separatedly carry out when starting after each pilot burner when having a mind to by igniting of AIM, with the start-up function of adjustments of gas producer through sufficient a period of time.Therefore, after an ignition device was at first by starting, remaining gas generant will not ignited by the material that ignites automatically before another ignition device was started with the time limit of having a mind to postpone.
The device shell can by employing such as friction welding, electron beam welding, laser welding, TIG welding and the so multiple welding method of protrusion welding engages the diffusion housing and casing is made.In the middle of these welding methodes, when two housings are engaged to form the device shell by friction welding, preferably when fixing casing, carry out friction welding.Generally, two housings are articulate on terminal stage.And by being engaged in friction welding in this way when the fixing casing, even get so that ignition device when being provided with prejudicially when casing one side's deviation of gravity center, two housings also can stably be engaged.In other words, friction welding is fixing at one and carries out under the situation that another part rotates.If one the center of gravity that remains to be rotated departs to some extent, then be difficult to stably carry out friction welding.So in the present invention, stable friction welding is achieved by carrying out friction welding when fixing casing one side.
When friction welding is carried out during at fixing casing, the flange portion that preferably is used for gas generator is installed on module housing is arranged on casing, and flange portion is shaped on the direction and/or the position of the casing of being fixed when a localization part is used to be defined in friction welding.When flange portion had many projections radially and is used for that gas generator is fixed in module housing, localization part was achieved by making non-symmetrical toward each other each projection.When a projection only was set, this projection itself can be a localization part.By making the flange portion that has localization part in this way, when inner shell was fixed within the device shell by friction welding, the engage position of device shell was always constantly determined with respect to the inner shell that is rotated.Therefore, might be fixed on inner shell on one direction and/or position of being scheduled to reliably.By make localization part on flange portion, flange portion both had been used for the location and also had been used to install gas generator.In the present invention, for when the friction welding on predetermined direction and/or position fixing casing, might replace flange certainly and on another part such, make localization part such as a peripheral wallboard and lower surface.
Secondly, be arranged on ignition device among the combustion chamber and can comprise that the injection direction restraint device is used to limit because the injection direction of the starting flame that ignition device took place.The injection direction restraint device is used to limit because the injection direction of the starting flame that ignition device took place, that is ignites and the injection direction of the flame of burning gases propellant.
The injection direction restraint device can surround the ignition device of at least a portion generation flame, and comprises a hollow body, has two or more flame transmission eyelets and is used for the flame jet direction is restricted to a required direction.Some examples of this injection direction restraint device are some reflection plates; One cylindrical element can surround whole ignition device; And a cup-like containers etc., can surround the part that the ignition device at place takes place flame.
Adopt this injection direction restraint device, might be limited to the flame jet direction of ignition device along the direction on combustion chamber interior wall plate surface." along the direction on combustion chamber interior wall plate surface " is to move on the direction that coincides with the interior wall plate surface configuration when referring to flame jet.By limiting the flame jet direction of ignition device in this way, gas generant among the combustion chamber best might burn, even ignition device is not arranged on the center of combustion chamber, perhaps combustion chamber is not circular and gas generant and the distance that is arranged between the ignition device of each corner of combustion chamber are quite gratifying.
As the injection direction restraint device, each exhausr port can distribute so that make away from the quantity of the exhausr port of first pilot burner can be big or its whole orifice area can be bigger, rather than mode very.Preferably these are combined to constitute the injection direction restraint device.
The output that is arranged on the ignition device among each combustion chamber can differ from one another.When ignition device also comprises a transmission gunpowder except each pilot burner with different outputs, material, shape or the quantity that just might regulate the transmission gunpowder, thereby the output of adjusting ignition device.
It is inboard so that realize and the stablizing and be connected smoothly of casing that one back-up ring can be arranged on inner shell.Back-up ring can be a gas generant connecting element that is shown among this embodiment.When by equipped inner shells such as friction welding, crimping operation, resistance welding, concavo-convex joint and casing, back-up ring remains on gas generant among the inner shell, so that gas generant can direct contact in casing, be used for putting ignition device but also obtain a space at inner shell.Adopt this back-up ring, can simplify assembling operation.Particularly when two or the filling direction of multiple gases propellant when being different during in assembling among as the present invention, it is effectively adopting back-up ring.Back-up ring can have a container shapes of being made by aluminium or iron, perhaps can be a kind of porous mass of being made by wire gauze etc.
Being included in pilot burner among the ignition device in a single day receives from the gas generator energizing signal of outputs such as a control setup and promptly is triggered.Therefore, one is used to pass out cable connection from the energizing signal of controlling device etc. in each pilot burner.Because gas generator of the present invention comprises two or more ignition device, so also just comprise two or more pilot burner.Draw each cable that is connected in each pilot burner on same direction, gas generator can easily be installed on module subsequently.
In multi-stage gasbag producer of the present invention, ignition device among being arranged on each combustion chamber comprises one when remaining to be connected in each pilot burner by the cable that the pilot burner and that an electric signal is triggered is used to transmit this electric signal by a connector, preferably, this adaptor union has certain position device, can be cable connection in being a pilot burner.That is, being connected in each pilot burner,, just can not obtain a required triggering output always if the cable of a mistake is connected to one of each pilot burner to transmit by means of regulate triggering the time limit among each cable of different energizing signal.So each pilot burner is furnished with each and remains to be connected in specially the registration device of one of each cable, this can prevent to connect error.This registration device can by between pilot burner and the adaptor union and the part that respectively plugs together that is used to be connected pilot burner and cable be made for difformity at each pilot burner, perhaps by making each groove of having diverse location and/or shape and/or each adaptor union of each projection, and be achieved.In addition, many cables of each pilot burner can come together in an adaptor union and adaptor union can be made registration device.Being arranged on registration device on the adaptor union of the present invention, also to comprise wherein more any factor of determining whether a latch or a socket can couple together all be different all situations, such as wherein connecting adaptor union and to the shape and size of the part (plug-in strip or charged latch) of its energy supply, perhaps the shape and size of adaptor union in the case all are different a kind of situations.That is, be included in and form the exclusive any means that are connected combination between cable and the pilot burner.
If adopt a kind of gas generator, it comprises a device shell, have many combustion chambers in the device shell and gas generant that time per unit takes place in each combustion chamber amount of gas differs from one another, the gas generant that differs from one another such as at least one direction among burning velecity, composition, ratio of component, shape and quantity each side, the triggering performance of gas generator then, particularly free air capacity can be regulated over time significantly and at random.When the gas generant among each combustion chamber is ignited independently with time limit arbitrarily and burns, ignited independently and the ignition device that burns is arranged among each combustion chamber.As gas generant, the inorganic azide that might use usually and be used widely is such as the azide base gas generant based on sodium azide, perhaps not based on the non-azide based gas generant of inorganic azide.If consider safety, non-azide based gas generant preferably.Gas generant is according to such as burning velecity, avirulence, combustion temperature, these demands of kick off temperature and suitably selected.When gas generant has different burning velecitys at each combustion chamber, might act as a fuel by employing such as the such azide of sodium azide, such as such non-azides such as nitroguanidines and adopt gas generant with different compositions or ratio of component itself with nitrogenous source, the perhaps shape of preparation wherein, such as granular, sheet, hollow short cylinder, discoid, bulk, porous block, the gas generant that can be changed or skin area can be changed by the size of molded products with single eyelet.Particularly when gas generant is made for a kind of porous blocks with many through holes, although the layout of each eyelet is unrestricted, but preferably the distance between the distance between the outer end of molded products and the eyelet center and each eyelet center is equal to each other basically, so that the performance of gas generator is stablized.More specifically say, at a kind of its cross-sectional plane is in the cylindrical molded products of circle, best structure is to cause an eyelet arrangement in the center and six eyelets are made around this eyelet, so that the center of each eyelet is exactly each equidistant leg-of-mutton center between each eyelet.Secondly, what can expect is, an eyelet is set in the center and around this central aperture 18 eyelets is set.The quantity of eyelet and the layout of eyelet are definite according to taking all factors into consideration easy degree, cost of manufacture and performance that gas generant makes, and therefore, the quantity of eyelet and the layout of eyelet are unrestricted.
At a kind of gas generator (pyrotechnic gas generator) that adopts the solid gas propellant to be used for obtaining making the gas of air bag bulging, a fil or a coolant preferably are used to purify or cool off the burning gases that take place owing to the burning gases propellant usually.Therefore, in gas generator of the present invention, when purifying and/or cool off the burning gases that take place owing to the burning gases propellant, can adopt the filter of making by the wire gauze of extrusion stratification.If this filter is made for the self-constriction structure, wherein filter can be owing to the pressure of burning gases pressure radially pushed outwards and its upper and lower two ends are compressed by the surface, inside of device shell, then the channelling of burning gases just can be prevented from and any special component is not set between the inner surface of filter end surface and device shell.A kind of like this self-constriction structure can narrow down to cause each inner surface gradually by the upper and lower internal table face tilt that makes the device shell, and by the upper and lower end surface that makes filter tilt so that with the upper and lower surface in alignment of device shell, and be achieved.The inboard of filter and the outside can be made for different stratification wire screen integral body forming a triplen, so that the outside that can present the defencive function of filter and filter, the inboard of filter can present the repression of swelling function of filter.The repression of swelling function can present by outer periphery so that the repression of swelling that supports filter with the skin of being made by the wire gauze block of stratification, porous circular cylinder block, endless belt block etc.
Among many combustion chambers are arranged on the device shell and burning gases when taking place owing to the gas generant of burning among each combustion chamber as mentioned above, preferably the burning gases of discharging from each combustion chamber flow through a shared fil.If all burning gases flow to this shared filter, it is just much of that a fil then is set among the device shell, and the result is, whole volume can reduce, and manufacturing cost also can reduce.Secondly, the burning gases that flow through shared filter can be discharged from being formed in the shared exhausr port of one on the device shell (respectively).
The gas that above-mentioned air bag gas generator is taken place with a gas generator is admitted to so that the air bag of bulging (capsule device) is received among the module housing, thereby constitute airbag apparatus.In this airbag apparatus, gas generator is started when an impact microphone detects bump, thereby discharges burning gases from device shell exhausr port.Burning gases flow into air bag so that air bag breaks through a module housing and a bulging, thereby form a cushion to absorb bump between the rigid component of passenger and vehicle.
According to the present invention, a kind of multistage gas generator for air bag is provided, wherein the overall dimensions of container can suppress, simple in structure, and gas generator can be easy to make, gas generator gives the passenger as far as possible little bump when being started in the starting stage of starting, and, according to the variation of passenger figure (sitting height is height or low, adult or children) and sitting posture (such as being close to control wheel), the starting output of gas generator and the time limit that output increases can be regulated arbitrarily so that shield and sustain the passenger safely.
Secondly, in gas generator of the present invention, at least one combustion chamber is provided with prejudicially with respect to the device shell, and the ignition device that provides for each combustion chamber is arranged among the device shell prejudicially with respect to the device shell.Because these characteristics might make the alerting ability of combustion chamber become maximum in the size that it directly makes progress at the suppressing unit shell.
The gas generator of eccentric structure can by comprise AIM, a kind of adaptor union, a kind of will be in the self-constriction formula fil that is illustrated after a while, perhaps its combination.This gas generator also can be achieved by being combined in the some other parts described in the present technique specification sheets.
According to the present invention, air bag gas generator comprises many pilot burners, each energizing signal outputs to each pilot burner from the signal output apparatus that ignites respectively, each pilot burner is eliminated with the error that is connected of igniting between the signal output apparatus output, and the multiple stage gas generator always can be with required output starting.Therefore, among can regulating starting output and exporting the multiple stage airbag apparatus that increases the time limit, always can obtain required start-up function.
Secondly, just when filter radially expands owing to triggering passing through of gas, surface contact between two members can be kept because the inclined end portion surface of filter is contacted with the supporting part among the device shell, thereby, can avoid triggering the channelling of gas effectively.Because filter is a member that can expand, thus do not need very high assembling to join precision, and the assembling operation of loader shell can carry out easily.
Description of drawings
Fig. 1 is a vertical cross section view, shows an embodiment of a kind of gas generator of the present invention;
Fig. 2 is the plan view of embodiment;
Fig. 3 is a partial cross sectional views of gas generator of the present invention;
Fig. 4 is a back view of gas generator of the present invention;
Fig. 5 is a fragmentary, perspective view, shows registration device;
Fig. 6 is a partial cross sectional views, shows a self-constriction constitutional formula fil;
Fig. 7 is the back view of gas generator, shows a localization part;
Fig. 8 is a vertical cross section view, shows another embodiment of gas generator of the present invention;
Fig. 9 is a view, shows the structure of a kind of airbag apparatus of the present invention;
Figure 10 is a schematic vertical cross section view, shows an embodiment of airbag apparatus of the present invention;
Figure 11 is a perspective schematic view, shows another embodiment of airbag apparatus;
Figure 12 is a perspective schematic view, shows an embodiment of inhibiting device;
Figure 13 is a perspective schematic view, shows another embodiment of inhibiting device;
Figure 14 is a perspective schematic view, shows another embodiment of airbag apparatus;
Figure 15 is a perspective schematic view, shows the another embodiment of airbag apparatus;
Figure 16 is a perspective schematic view, shows the another embodiment of airbag apparatus;
Figure 17 is a perspective schematic view, shows another embodiment of airbag apparatus;
Figure 18 is a vertical cross section view, shows another embodiment of gas generator of the present invention;
Figure 19 is a vertical cross section view, shows the embodiment of a kind of gas generator of the present invention;
Figure 20 is a vertical cross section view, shows an embodiment of filter of the present invention;
Figure 21 is a vertical cross section view, shows another embodiment of fil;
Figure 22 is a vertical cross section view, shows another embodiment of gas generator;
Figure 23 is a vertical cross section view, shows the another embodiment of gas generator;
Figure 24 is a vertical cross section view, shows another embodiment of gas generator;
Figure 25 is a vertical cross section view, shows another embodiment of gas generator;
Figure 26 be among Figure 25 shown in the transparent inside view of gas generator;
Figure 27 is a vertical cross section view, shows another embodiment of gas generator;
Figure 28 is a vertical cross section view, shows an embodiment of gas generator of the present invention;
Figure 29 is the decomposition diagram of a main portion, shows a partition;
Figure 30 is the decomposition diagram of a main portion, shows registration device;
Figure 31 is a vertical cross section view, shows another embodiment of a kind of air bag gas generator;
Figure 32 is a vertical cross section view, shows the another embodiment of air bag gas generator;
Figure 33 be among Figure 31 shown in the transparent inside view of gas generator;
Figure 34 is the plan view of the present invention with the plate of turning back.
The specific embodiment
Symbol description
1 diffusion housing
2 casings
3 device shells
4 inner shells
5 bore portions
8 transmission gunpowder
10 exhaust outlets
25 cooling agents/cleaner
32 flanges
50 first combustion chambers
51 first igniters
52 first gases generate agent
60 second combustion chambers
61 second igniters
62 second gases generate agent
101 air bag gas generators
102 triggering signal output devices
103 air bags
107 triggering signal outputs
108 igniters
109 leads
110 connectors
301 diffusion housings
302 casings
303 device shells
305 filters
309 gases generate agent
311 igniters
The inclined end face of 351 filters
352,452,552,652,652 inclined surfaces (supporting part)
353 filter supporting arrangements
The sloping portion of 453,553,653,753 device shells
803 device shells
822 cooling agents/cleaner
1105a first combustion chamber
1105b second combustion chamber
1107 partitions
1109a first gas generates agent
1109b second gas generates agent
1112a first pilot burner
1112b second pilot burner
1113 firing device lassos
1185 materials (AIM) that ignite automatically
The specific embodiment
A kind of multistage gas generator for air bag of the present invention will be illustrated according to some embodiment that are shown in each figure below.
Eccentric structure embodiment
Fig. 1 is a vertical cross section view, shows an embodiment of gas generator of the present invention.Gas generator shown among Fig. 1 has a kind of structure that is suitable for being arranged on person for driving a car's one side.
In Fig. 1, gas generator comprises a cylindrical shape device shell 3, adopts welded joint and makes; One diffusion housing 1 has an exhausr port 10; And a casing 2, form an inner reception space with the diffusion housing.One valve protection cap shape inner shell 4, its horizontal profile are one circular and its upper end is an osed top, are provided with prejudicially and are fixed within the device shell 3 with respect to the central axis of device shell.Inner shell can suitably be changed according to the volume ratio of each required combustion chamber with respect to the eccentric degree of device shell.Eccentric degree can be according to device shell in-to-in structure, and whether analogy exists one coolant/fil 25, is changed.Such as, when coolant/fil 25 lay so that when being opposite to a peripheral panel surfaces as the inside of gas generator shown among Fig. 1, eccentric degree can suitably be selected in one 10 to 75% scope.But, because this digital scope may be according to the size change of pilot burner etc., so in the gas generator shown among Fig. 1, number range is expressed as the degree of eccentricity index of inner shell 4.
Inner shell horizontal profile shape can be made for such as multiple shapes such as rectangle and ellipses.Consider to be engaged in casing 2 etc. easily that the horizontal profile shape of inner shell preferably is made for circular.In other words, when inner shell 4 was engaged in casing 2 by friction welding, the horizontal plane section shape of inner shell 4 need be circular.Secondly, when these members were engaged by laser welding, needing to keep the laser emission distance was unmodified.
The inner shell 4 that defines first combustion chamber 50 and second combustion chamber 60 is provided with prejudicially with respect to the central axis of device shell 3.Second combustion chamber 60 that is arranged within the inner shell 4 also is an accentric with respect to device shell 3.Each pilot burner is separately positioned among first combustion chamber 50 and second combustion chamber 60, and in the middle of them, and being arranged on second pilot burner 61 among second combustion chamber, to be arranged on respect to device shell 3 central axis B are centers of accentric second combustion chamber 60.As a result, owing to the flame that takes place of starting second pilot burner 61 second gas generant 62 that can burn equably.Secondly, second pilot burner 61 and be arranged among first combustion chamber 50 first pilot burner 51 the two all be eccentric the setting with respect to device shell 3 central axis.Owing to respect to device shell 3 central axis first and second pilot burners and inner shell are set prejudicially, can enlarge the change of the volume ratio of first and second combustion chambers, and device shell 3 can be suppressed to Min. in its size that directly makes progress.
Among each pilot burner that is arranged among the combustion chamber separately, be arranged among first combustion chamber 50 first pilot burner 51 around first pilot burner 51 and above have transmission gunpowder 8.Transmission gunpowder 8 is received among the transmission gunpowder container 26 so that gas generator is assembled easily, and can prevent to transmit gunpowder 8 when the transmission gunpowder is contained within the automobile because impact that is produced or vibration and disperse within first combustion chamber 50, have consequently worsened about first gas generant 52 performance of igniting.Transmission gunpowder container 26 is made by aluminium, and the thickness that has (supposeing about 200 μ m) causes container 26 easily because transmission gunpowder 8 breaks in the burning among the transmission gunpowder container 26 arrives with transmission flame around it.For second combustion chamber, a kind of optional such as the transmission gunpowder that is arranged among first combustion chamber 50.This be because, second gas generant 62 ignites easily compared with first gas generant 52, and the pressure of second combustion chamber constantly increase under the leak free state until disrumpent feelings 7 that is used to seal following inner shell 4 one eyelets 6 break till.Even also can not break when disrumpent feelings the 7 interior pressure when first combustion chamber 50 increases owing to the burning of first gas generant 52, break and more increase Shi Caihui in the interior pressure of inner pressure ratio first combustion chamber 50 of second combustion chamber 60.But, the transmission gunpowder can be adopted with the need.
One cylindrical element 36 is arranged among first combustion chamber 50 so that around first pilot burner 51 be arranged on the radial outside of first pilot burner, 51 tops transmission gunpowder 8.Cylindrical element 36 is made for up and down, and two ends all are the drums of freely opening, one end not interband unoccupied place is sleeved on the outer periphery of the part that first pilot burner 51 assembles with it, and the other end gives clamping by clamper 11, and the latter is arranged on the inner near surface of diffusion housing 1 top plate portion and is fixed in a preposition.Cylindrical element 36 is shaped on many flame transmission eyelets 37 at its peripheral wallboard place.Owing to the flame that the burning of transmitting gunpowder 8 takes place is spouting from each flame transmission eyelet 37, then igniting and burning is arranged on first gas generant of cylindrical element outside.Preferably, cylindrical element is to use the material the same with device shell 3 materials to make.
Particularly in being shown in the gas generator of this embodiment, first combustion chamber 50 is made for the annular that is similar to the reaping hook shape shown among Fig. 2, come out and the annular inner edge of reaping hook shape is the punching out of circular ground, first gas generant 52 promptly is arranged among this combustion chamber.Therefore, unlike second combustion chamber 60, in first combustion chamber 50, the distance between the gas generant 52 and first pilot burner 51 changes according to the position that gas generant puts the place.So when first pilot burner 51 was ignited, first gas generant 52 was ignited unevenly and is burnt.Reason for this reason, the direction that is formed in each flame transmission eyelet 37 on the inner circular barrier part 36 peripheral wallboards is limited, so that the flame that transmits gunpowder 8 is being gone up ejaculation along the direction of first combustion chamber, 50 inner wall surface 50a (be shown in each arrow Fig. 2 among direction).Under this configuration, the gas generant 52 that is positioned at second combustion chamber 60 (being inner shell 4) back also can burn equably.In this embodiment, inner wall surface 50a coincides with a surface of coolant/fil 25.
Another example as the injection direction restraint device, replace inner circular barrier part 36, might adopt a cup-like containers, be used for going up the flame that penetrates first ignition device (Fig. 1 first pilot burner 51 and transmission gunpowder 8) having a nozzle on its peripheral wallboard along the direction of first combustion chamber, 50 inner wall surface 50a (be shown in Fig. 2 among direction) with each arrow.Therefore, can seal at least as the cup-like containers of injection direction restraint device and to enclose first pilot burner 51 and transmission gunpowder 8 injection direction, and be used around being contained in (being positioned on) first ignition device with restriction flame.Even when adopting a kind of like this injection direction restraint device, also preferably, first ignition device of the portion that sets within it comprises and should be made it to ignite and the biography medicine gunpowder that burns and the starting device of pilot burner by pilot burner.
Another example of injection direction restraint device is the plate 99 of turning back of one shown among Figure 34, can be on the direction of representing with each arrow reflect flame with the restriction direction.Such as, a spill plate can be placed between combustion chamber and the device shell.Turning back plate can be at fil with interior or beyond fil.The plate of turning back plays the effect of flame direction that first pilot burner is come from control, also plays the effect of the gas flow that control takes place by the burning gases propellant.
The inner shell that defines first combustion chamber 50 and second combustion chamber 60 has above-mentioned valve protection cap shape, and many bore portions 5 are formed on its peripheral wallboard.Bore portions make so that they only because second gas generant 62 that burning is arranged among second combustion chamber 60 just is opened, and can not be opened owing to first gas generant 52 that burning is arranged among first combustion chamber 50.In the present embodiment, each bore portions 5 comprises many eyelet 6 and a kind of disrumpent feelings 7 of being used to seal these eyelets that are formed on the inner shell 4 peripheral wallboards.As disrumpent feelings 7, employing be a kind of stainless sealing band (stainles sseal tape).Make for disrumpent feelings 7 to such an extent that consequently it just opens each eyelet 6 when making it to break, peel off, burn or throwing off owing to burning second gas generant 62, and can be not destroyed owing to burning first gas generant 52.In addition, the other method that makes it to open by first gas generant 52 as each bore portions that prevents inner shell 4, must cover each bore portions 5 that plate or similar component cover inner shell 4 with a kind of, this plate is the plate that covers that has suitable shape by making, such as by a ribbon-shaped members is made for annular, and obtain, so that the flame that causes owing to burning first gas generator is unlikely to direct contact bore portions 5.
In addition, each bore portions 5 can also be by as making a kind of otch 12 or by being embodied as the local thickness that reduces inner shell periphery wallboard shown among Fig. 3 b on the peripheral wallboard of the inner shell that is shown in 4 among Fig. 3 a.When each bore portions was opened, first combustion chamber 50 and second combustion chamber 60 communicated with each other, and the burning gases that take place among second combustion chamber 60 pass first combustion chamber 50, subsequently outside the displacer shell 1.
One gas generant connecting element 14 is arranged on and is used for safety within the inner shell 4 and successfully is connected casing 2.When inner shell 4 friction weldings during in casing 2, gas generant connecting element 14 is used for preventing that gas generant 62 direct contacts are in casing 2 and the installing space that is used to guarantee to guarantee in the space that is formed by inner shell 4 second pilot burner 61.When inner shell 4 was loaded on casing 2, it not only can be installed by above-mentioned friction welding, also can also be installed by resistance welding, crimping, concavo-convex joint etc.In the case, by adopting gas generant connecting element 14, also can simplify assembling operation.As gas generant connecting element 14, can be an aluminum tube device, the thickness that has causes it to be destroyed by the burning of gas generant 62 easily.In addition, might adopt some suitable members, such as the porous member that uses wire gauze (material, shape etc. are all unrestricted) to achieve the above object.When using gases propellant connecting element 14 not, a kind of single hole cylindrical shape gas generant 62 is made for a gas generant solid, and having with inner shell 4 inner spaces is the identical shape of shape, and this solid can be arranged within the inner shell 4.In the case, gas generant connecting element 14 can omit.
In the present embodiment, the lasso part 2a of casing 2 is made for the size that can fix two pilot burners 51 and 61 side by side.Under this configuration, if two pilot burners 51 and 61 originally were fixed in lasso part 2a by crimping or similar technology, and lasso part 2a is shaped on circular cylindrical shell part 2b to constitute casing 2 with being integral, and then two pilot burners 51 and 61 can be fixed in casing 2.Though first pilot burner 51 and second pilot burner 61 are drawn to such an extent that have same size in the drawings, they can have different output for combustion chamber separately.
In this embodiment, shown among the backplan of Fig. 4, be connected to each cable 15 that pilot burner 51 and 61 is used to transmit cranking signal and draw in same direction.Registration device is formed on the position that pilot burner 51 and 61 is provided with the place, so that corresponding each cable 15 can stipulate to be connected in corresponding each pilot burner.Shown among the main portion enlarged view of Fig. 5 a to 5d, this registration device can have difform each adaptor union 16 and is achieved by adopting for pilot burner separately.In the registration device among being shown in Fig. 5 a, each adaptor union 16 is shaped on location groove (or projection) 17, and differs from one another for corresponding pilot burner corresponding to the projection (or groove) 18 of each location groove (or each projection) 17.That is the position of the groove of corresponding pilot burner (or projection) 17 is changed, so that when each adaptor union 16 was assemblied in gas generator, if each adaptor union 16 does not assemble in correct direction, each adaptor union can hinder mutually and can not correctly install.In the registration device among being shown in Fig. 5 b, just among each adaptor union 21 is furnished with a location groove (or projection) 19.That is an adaptor union with groove (or projection) 19 can be connected in the pilot burner with projection (or groove) 20, but an adaptor union 21B who does not have groove (or projection) 19 can not be connected in the pilot burner 22a with projection (or groove) 20.As a result, when assembling, can find the connection error of each adaptor union 21 easily.In Fig. 5 c, the connecting bridge 23 of each adaptor union itself differs from one another.In Fig. 5 d, two adaptor unions are made for one, and make a location groove (or projection) 24.As registration device, also can suitably adopt other to be used to eliminate the device of adaptor union connection error.
One coolant/fil 25 purifies/cools off the burning gases that take place owing to the burning gases propellant as being used to, and is arranged among the device shell 3.The gas that takes place owing to burning first and second gas generants flows through coolant/fil 25 jointly.In order to prevent to cause burning gases to flow through the channelling in the space between coolant/fil 25 end surfaces and the inner surface of diffusion housing 1 top board, the surface of interior periphery up and down of coolant/fil 25 and the surface, inside of device shell can cover with an aduncate flange shape channelling and prevent part.
One skin 27 be used to prevent coolant/pass filter 25 since burning gases pass through expand.This skin not only can use the wire gauze block of a stratification to be made, but also can use a perforated cylinder spare that is provided with many through holes in its peripheral wall part surface, and perhaps one comprises that endless belt-shaped band shape with preset width suppresses layer.Outer being provided with in its outside has clearance of predetermined width 28, so that burning gases can flow through the whole surface of fil.Being formed in the exhausr port 10 of diffusion on the housing 1 is closed by a sealant tape 29 and is used to prevent that extraneous air from entering.This sealant tape 29 breaks when gas is discharged.The purpose of sealant tape 29 is that the atmosphere gas propellant is not subjected to external moisture, and that sealant tape 29 does not influence is any such as pressing such property regulation in the burning.The two all flows through exhausr port 10 gas that gas that first gas generant 52 that burns is caused and burning second gas generant 62 are caused.
Shown among Fig. 6 or other drawings, as being used to purify and/or the filter of cooling combusting gas, can be self-constriction formula filter 30, its upper and lower end surface is a bevelled on the peripheral direction externally.When adopting self-constriction formula filter 30, preferably last the and inside face 31 of device shell is that bevelled so that device shell narrow down gradually.As a result, the upper and lower end surface of filter 30, when radially outwards pushing by burning gases, the surface, inside 31 of the device shell that reclines, and might prevent burning gases channelling betwixt.
Just like above-mentioned, in the gas generator among being shown in Fig. 1, pilot burner 51,61 and inner shell 4 are eccentric settings with respect to device shell 3.In a kind of like this gas generator, when diffusion housing 1 and casing 2 are engaged by friction welding since when carrying out friction welding fixing casing, two housings can stably be joined together.Particularly when inner shell 4 directly is loaded on casing 2 by friction welding, shown among Fig. 7, preferably casing 2 is provided with a flange portion 32 and is used for gas generator is loaded on module housing, and its each periphery is made the localization part 34 of otch and is formed on the part such as a projection 33 that constitutes flange portion 32.If localization part 34 is made in this way, then be fixed on the unmodified direction according to localization part 34 at any time, so inner shell 4 can be loaded on preposition reliably owing to casing 2.
In the gas generator of making in the above described manner, when being arranged on when being configured in exterior first combustion chamber of inner shell 4 50 in-to-ins first pilot burners 51 by starting, first gas generant 52 among the combustion chamber 50 is fired and burn with the generation burning gases.Owing between inner shell 4 and coolant/fil 25, guarantee the gap that a gas can flow through, so burning gases can flow through whole coolant/fil 25.When burning gases flow through coolant/fil 25, gas was purified and cools off, and then discharged from exhausr port 10.
On the other hand, when second pilot burner 61 within being arranged on inner shell 4 was started, second gas generant was ignited and is burnt so that burning gases to take place.These burning gases can be opened the bore portions 5 of inner shell 4, and flow to first combustion chamber 50 from bore portions 5.After this, burning gases flow through coolant/fil 25 and discharge from exhausr port 10 as the burning gases of first gas generant 52.The sealant tape 29 of sealing exhausr port 10 since occur in burning gases among the device shell 3 pass through break.Second gas generant 62 is because of starting second pilot burner and ignited and burn, and directly not burned because of the burning of first gas generant 52.This be because, the bore portions 5 of inner shell 4 is only because of the burning of second gas generant is opened, and is not opened because of the burning of first gas generant 52.But, shown among Fig. 8, when the material that ignites automatically (AIM) 35, remaining the heat of combustion of first gas generant 52 that transmitted by device shell 1 grade makes it to ignite, when being received among second combustion chamber 60, second gas generant 62 can be burned indirectly by the burning of first gas generant 52.
That is in the above-mentioned multistage gas generator of a kind of air bag, first and second gas generants 52 and 62 are ignited respectively by first and second pilot burners independently and are burnt.But, have a kind of situation to be, only allow wittingly current direction first pilot burner 51 with ignite only and first combustion chamber 50 that burns among gas generant 52.That is second gas generant 62 and second pilot burner 61 stay wittingly and will not burn.In the case, bring inconvenience in the time of can or restoring in cleaning after a while.Therefore, preferably, at starting gas generator (just first pilot burner) afterwards, the gas generant 62 of second combustion chamber 60 was burnt on the time limit (such as 100 milliseconds or more) that ignite the time limit than the normal delay that is used to start second pilot burner 61 (such as 10 to 40 milliseconds) more postpone.So the material 35 that ignites automatically remains to be ignited by the heat of combustion that transmits first gas generant 52 and burn, be arranged in the gas generator that is shown among Fig. 8.Second gas generant 62 is started since first pilot burner 51, through after the abundant long duration that being longer than the delay time limit that second pilot burner 61 is started after lagging behind in a schedule time (that is the starting between two pilot burners at interval), ignited by the material 35 that ignites automatically.That is this burning that is different from second gas generant 62 is delayed (in other words, igniting of second pilot burner is delayed) so that the situation of adjustments of gas producer starting ability.Secondly, gas generant 62 is postponed so that the material 35 that will never be ignited automatically during the adjustments of gas producer starting ability ignites and burns artificially at the starting current that leads to second pilot burner 61.Automatically the material 35 that ignites can combine with second pilot burner 61.
According to the gas generator of making in the above described manner, the output mode of gas generator (starting ability) can be by at random regulating igniting the time limit of two pilot burners 51 and 61, such as by at first start first and second pilot burners 51 and 61 the two one of or by starting the two simultaneously, and regulated.Therefore, under the multiple conditions such as the speed of a motor vehicle such as collision time the and ambient temperature, can the most suitably make the design of air bag in the described after a while airbag apparatus.Particularly be shown in the gas generator among Fig. 1, because two combustion chamber configuration diametrically, the height of gas generator can control to minimum.
Equally, the shape of gas generant, component, ratio of components and quantity etc. can suitably be changed so that obtain needed output mode.
A kind of embodiment of airbag apparatus
Fig. 9 shows an embodiment of a kind of airbag apparatus according to the invention, and situation is that this airbag apparatus designs to such an extent that comprise that consequently one adopts the gas generator of electric ignition type ignition device.
Airbag apparatus comprises a gas generator 200, one impact microphone 201, one control setups, 202, one module housing 203 and air bags 204.In gas generator 200, adopt with reference to the described gas generator of Fig. 1 and its starting ability regulate so that apply as far as possible little bump in the starting stage of starting gas generator to the occupant.
When semiconductor-type acceleration pick-up 201 detects when bump constantly at auto against, signal is transmitted to control setup 202, and control setup 202 began to calculate in the moment that the bump signal that comes from sensor surpasses certain numerical value.When the result who calculates surpassed certain numerical value, it was to pilot burner 51, the 61 output energizing signal of gas generator 200.Therefore, pilot burner 51,61 gas generant that is triggered so that ignites, concurrent angry body and gas generant blazes up.This gas is discharged into air bag 204.Air bag consequently expands so as to breaking through module housing 205, thereby forms a kind of shock-absorbing cushion between control wheel 207 and the rider.
The gas generator of eccentric structure can be achieved by AIM, connection eyelet, adaptor union, self-constriction formula fil or its certain combination.Gas generator can also be by being achieved in conjunction with some other parts described in this specification sheets.
The present invention includes a kind of gas generator or a kind of airbag apparatus, contain AIM, be communicated with eyelet, adaptor union, self-constriction formula fil.Be suitable for eccentric structure and can combine use at this AIM that illustrates, connection eyelet, adaptor union, self-constriction formula fil.
(AIM)
That is a kind of air bag gas generator of the present invention comprises a device shell, includes an exhausr port; Ignition device is received among the device shell and a chance bump is promptly ignited; And gas generant, be received among the device shell and make it to ignite and burn and take place with so that the burning gases of airbag inflation by ignition device, two combustion chambers that are used to put gas generant in the producer are arranged among the device shell with separating, and are made it to ignite and the material that ignites automatically (AIM) that burns is arranged among any one of two combustion chambers by the heat of transmission.
The one connection eyelet that allows to interconnect between two combustion chambers also can be provided with.
Such as, if the gas generant that is received within many combustion chambers is burned at different time limit places in each combustion chamber, then preferably, the material (AIM) that ignites automatically is arranged on wherein to put and remains among the combustion chamber of the gas generant that burnt at the time limit place that postpones.In the case, igniting material (AIM) automatically can be by making it to ignite and burn by the transmission heat that takes place of the at first burned gas generant of burning.Preferably, the material that ignites automatically can be located firing gas generant and burning in the time limit that postpones after 100 milliseconds of moment that the ignition device that leaves the at first burned gas generant that is used to ignite is started or longer time.Secondly, the material that ignites automatically can be provided with in conjunction with a pilot burner, this pilot burner be included in to ignite in a time limit place that postpones and the ignition device of the gas generant of burn burned (perhaps after the starting gas generator, still staying) among.
The gas generator of gas generant can be achieved by a kind of gas generator in different each combustion chambers of time limit place's burning, an ignition device comprises one and remains owing to the starting one pilot burner transmission gunpowder that ignited and burn among the latter, this transmission gunpowder branch gives each pilot burner and is ignited independently in each pilot burner and burn, and the gas generant that is received among many combustion chambers should be made it to ignite and burn by the flame that burning in different piece respectively be transmitted gunpowder and caused.
Such as, two combustion chambers that are used for putting gas generant are arranged on the gas generator among the device shell therein, Ran Shao first gas generant and among second gas generant of the time limit place's burning that postpones is separately positioned on two combustion chambers at first, and ignite second ignition device of second gas generant of first ignition device of first gas generant that is provided for igniting and being used to, the material (AIM) that ignites automatically is arranged among the pilot burner that is included within second combustion chamber or second ignition device.As the material that ignites automatically (AIM), adopt because the heat via the transmission of device shell that burning first gas generant is taken place makes it to ignite and the material of fuel.
Two combustion chambers that are used to put gas generant ground close to each other that can make progress in the footpath of device shell is arranged among the device shell with one heart, and can be provided with one and allow the connection eyelet that is communicated with between two combustion chambers.
As the material that ignites automatically (AIM) that can be used among the present invention, can be a kind of material of igniting and burning of can making it by the heat output (promptly transmitting heat) of (the at first burning) gas generant that transmits from device shell etc. at least.An example of this material is a nitrocellulose.
But, since these certainly can according to various gases used propellants, be used to transmit heat output heat transfer piece (such as the device shell), leave the distance that puts the gas generant position that remains at first to be burnt etc. and changed, so must suitably be adopted at design phase.
Above-mentioned air bag gas generator is introduced the gas that taken place by gas generator together with one so that the air bag (capsule device) that expands is housed among the module housing, thereby constitutes airbag apparatus.In this airbag apparatus, gas generator is started in response to an impact microphone detects bump, thereby discharges burning gases from device shell exhausr port.Burning gases flow through air bag so that air bag and break through a module housing and expand, and are used for absorbing bump thereby form a cushion between passenger and automobile rigid component.
AIM embodiment 1
Figure 28 is a vertical cross section view, shows another embodiment of air bag gas generator of the present invention.The gas generator that is shown among this figure has the structure that is suitable for being arranged on driver's one side.
In the gas generator among being shown in this figure, one first combustion chamber 1105a and one second combustion chamber 1105b are defined by an inner circular barrier part 1104, and are provided with close to each otherly with one heart in a device shell 803.Inner cylindrical 1104 portion's periphery surface within it has and is provided with a step otch 1106 in predetermined height.One is used to define the partition 1107 that the second combustion chamber 1105b and an ignition device put chamber 1108 is arranged within the step otch 1106.In the present embodiment, shown in a decomposition diagram among Figure 29, partition 1107 comprises a circular bulk-breaking 1150 that cuts, and engages the step otch 1106 of inner circular barrier part 1104; And a calotte sealing member 1160, engage the circular bulk-breaking 1150 that cuts.The circular bulk-breaking 1150 that cuts has flat basically circle, and comprises a bore portions 1150, and a transmission gunpowder of calotte sealing member 1160 puts part 1161 and inwardly is fitted into wherein; One circular eyelet 1152 has a lower surface, has circular cavity and is used to put, pilot burner 1112b; And one second flame transmission eyelet 1119, pass the center of circular basically eyelet 1152.Calotte sealing member 1160 comprises and is fitted into the circular cylindrical shape transmission gunpowder that cuts among bulk-breaking 1150 bore portions 1151 and put in the second combustion chamber 1105b and puts part 1161, and one the cylindrical shape pilot burner put aperture 1162, be formed in be opposite to circular cut the position of bulk-breaking 1150 circular eyelets 1152 and stretch to leave the opposite side that the transmission gunpowder puts part 1161.One first transmission gunpowder 1116a is received within the transmission gunpowder and puts among the part 1161, and one second pilot burner 1112b is fitted into pilot burner and puts among the part 1162.Circular cut bulk-breaking 1150 and calotte sealing member 1160 is engaged with each other so that the transmission gunpowder of calotte sealing member 1160 puts part 1161 and is fitted among the circular bore portions 1151 of cutting bulk-breaking 1150.Pass pilot burner and put the circular eyelet 1152 that the 1162 second equipped pilot burner 1112b tops, aperture put in circular section bulk-breaking 1150.
Comprise that the circular partition 1107 that cuts bulk-breaking 1150 and calotte sealing member 1160 is formed in the lip-deep step otch 1106 of inner circular barrier part 1104 interior peripheries as being engaged in shown among Figure 28.That is circular bulk-breaking 1150 periphery edges that cut are supported by step otch 1106, and calotte sealing member 1160 cuts bulk-breaking 1150 by circle and reclined and support.The edge of one calotte sealing member, 1160 peripheries make so that bending putting on the identical direction in hole 1162 with pilot burner, and a bending part 1163 is fitted to the lip-deep groove 1164 of the interior periphery that is formed in inner circular barrier part 1104.Under this configuration, circular cut that bulk-breaking 1150 is supported by calotte sealing member 1160 so that it is in mobile stoped of device shell 803 on axially.Secondly, by the bending part 1163 of calotte sealing member 1160 periphery edges being fitted among the groove 1164 on inner circular barrier part 1104 interior periphery surfaces, partition 1107 (that is calotte sealing member 1160) and inner cylinder 1104 are engaged with each other and do not have the gap.Therefore, in inner circular barrier part 1104, be arranged on ignition device on casing 802 1 sides and put chamber 1108 and be arranged on the second combustion chamber 1105b on diffusion housing 801 1 sides and cut branch reliably by the ignition device hermetically-sealed construction that comprises calotte sealing member 1160 and groove 1164 and come.
Being formed in igniting within the calotte sealing member 1160 puts aperture 1162 have a skirt section of scattering as a covering of the fan, and its inboard, promptly put aperture 1162 and be received within pilot burner and put between the aperture 1162, O shape circle 1181 is set is used to seal pilot burner and puts space between the aperture 1162 and the second pilot burner 1112b at pilot burner.Secondly, because O shape circle 1181 also is pressed on the pilot burner connecting element 1182 that will mention below one,, puts among the space that aperture 1162, O shape circle 1181 and pilot burner connecting element 1182 form the second pilot burner 1112b so being arranged on the pilot burner that cuts circular eyelet 1152, the calotte sealing member of bulk-breaking by circle.When once the starting second pilot burner 1112b, sealing is formed in the circular sealant tape 1120 that cuts second flame transmission eyelet 1119 in the bulk-breaking 1150 circular eyelets 1152 and is broken through, and the spatial communication that forms is in the second combustion chamber 1105b.The first pilot burner 1112a and the second pilot burner 1112b are by comprising that pilot burner puts the hermetically-sealed construction (being called " pilot burner hermetically-sealed construction " from now on) of 1162 skirt sections, aperture, O shape circle 1181 and pilot burner connecting element 1182 and separate each other reliably.Under this configuration, because the starting flame that arbitrary pilot burner took place will directly not flow to the space that another pilot burner puts the place.
In addition in the present embodiment, two pilot burner 1112a and 1112b are fixed in independent initiation lasso 1113 so that each pilot burner and can be easily positioned among the device shell.Particularly in the present embodiment, two pilot burner 1112a and 1112b supports and are fixed in initiation lasso 1113 by engaging the pilot burner connecting element 1182 that causes lasso 1113.Pilot burner connecting element 1182 is made for and a kind ofly covers the shape that causes lasso 1113 upper faces, and has some each pilot burner tops and can insert wherein eyelet 1184, is supporting each shoulder 1183 like this.Being arranged on two pilot burner 1112a causing lasso 1113 and 1112b is fixed in and is sleeved on the pilot burner connecting element 1182 that causes on the lasso 1113.Adopt 1182, two pilot burner 1112a of such pilot burner connecting element and 1112b easily to be assembled into and cause lasso 1113 the insides.In being shown in the gas generator of present embodiment.The first pilot burner 1112a and the second pilot burner 1112b differ from one another in shape and starting output facet, but also can adopt two pilot burners with same starting output.
When starting is shown in the gas generator of present embodiment,, the flame that takes place of the starting first pilot burner 1112a is arranged on the first transmission gunpowder of pilot burner top owing to igniting and burn.The flame that takes place owing to the burning first transmission gunpowder will never flow to the space that the second pilot burner 1112b puts the place because of the pilot burner hermetically-sealed construction, also can not flow to the second combustion chamber 1105b because comprising the ignition device hermetically-sealed construction of calotte sealing member 1160 bending parts 1163 and inner circular barrier part 1104 grooves 1164.Therefore, owing to burning first flame that takes place of transmission gunpowder passes the flame transmission eyelet 1117 that is formed on the inner circular barrier part 1104 peripheral wallboards and flows to the first combustion chamber 1105a only, and ignite and the first gas generant 1109a that burns so that burning gases to take place.One as the starting second pilot burner 1112b and the flame that takes place passes to be formed in and circularly cuts second flame transmission eyelet 1119 in the bulk-breaking 1150 circular eyelets and flow to the second combustion chamber 1105b only, and ignite and the second gas generant 1109b that burns so that burning gases to take place.Particularly in gas burner of the present invention, the second transmission gunpowder is not set, and the second gas generant 1109a is ignited by a flame that takes place as the starting second pilot burner 1112b directly and is burnt.
The burning gases that take place owing to the burning first gas generant 1109a and the second gas generant 1109b pass a common coolant/pass filter 822 then and purify betwixt and cooled off burning gases, and the latter also is discharged from from exhausr port 826 after by gap 825.Seal when the sealant tape 1118 of first and second flames transmission eyelet and 1120 burning gases when the flames of pilot burner and transmission gunpowder pass and broken through, and the sealant tape 827 that seals exhausr port 826 is broken through when burning gases pass.
Like this, staggered when the starting time limit of pilot burner 1112a and 1112b, and the igniting the time limit of gas generant 1109a and 1109b, the i.e. starting ability of gas generator, when being adjusted, make registration device in case for corresponding pilot burner 1112a and 1112b determine each lead 815 of regulation '.Such as shown among the decomposition diagram of each main portion among Figure 30 a to 30d, registration device can have difform adaptor union 816 ' be achieved by adopting for each pilot burner.Under the registration device situation that is shown among Figure 30 a, each adaptor union be shaped on location groove (or projection) 817 ', and corresponding to each location groove (or projection) 817 ' each projection (or groove) 818 ' the position be different for each pilot burner.That is, the groove of each adaptor union (or projection) 817 ' the position so change, if so that each adaptor union 816 ' each adaptor union 816 ' be not contained in when being loaded on gas generator on the correct direction, then each adaptor union hinders each other and can not correctly install.In the registration device among being shown in Figure 30 b, each adaptor union 816 ' among have only one be provided with location groove (or projection) 819 '.That is, one have groove (or projection) 819 ' adaptor union 821A ' can be connected in one do not have projection (or groove) 820 ' pilot burner 822b ', and one do not have groove (or projection) 819 ' adaptor union 821B ' can not be connected in one have projection (or groove) 820 ' pilot burner 822a '.As a result, assembling the time can easily find each adaptor union 821 ' connection error.In Figure 30 c, the connecting bridge 823 of each adaptor union ' itself differ from one another.In Figure 30 d, two adaptor unions are made for an adaptor union, and make a location groove (or projection) 824 '.As registration device, also can suitably adopt other to be used to eliminate the device of adaptor union connection error.
That is in the gas generator of present embodiment, the first and second propellant 1109a and 1109b can be ignited respectively by the first and second pilot burner 1112a and 1112b and be burnt independently in addition.In some cases, electric current only puts on the first pilot burner 1112a so that only ignite and burn the first gas generant 1109a of burning among the 1105a.In other words, the second gas generant 1109b and the second pilot burner 1112b stay and will not burn.This situation brings inconvenience in the time of can or restoring in cleaning after a while.Therefore, preferably, ignite the time limit of the normal delay that starts the second pilot burner 1112b afterwards compared with the body producer of taking offence (just the first pilot burner 1112a) afterwards of the gas generant 1109b among the second combustion chamber 1105b located to be burnt in time limit (such as 100 milliseconds or more) that (such as 10 to 40 milliseconds) more postpone.So, owing to the transmission of the heat output of the first gas generant 1109a makes it to ignite and the material 1185 that ignites automatically that burns is arranged among the present invention.In this case, the second gas generant 1109b is through more being made it to ignite by the material 1185 that ignites automatically after the adequate time, and this time is longer than and is used for the normal scheduled delay that starts the second pilot burner 1112b after the starting first pilot burner 1112a (that is the starting time interval between two pilot burners).That is it is different from following situation, and promptly the second gas generant 1109b burned at the time limit place that postpones (that is second pilot burner is ignited at the time limit place that postpones) is so that the starting ability of adjustments of gas producer.Can at random be postponed starting ability with the adjustments of gas producer though lead to the second pilot burner 1112b starting current, the second gas generant 1109b is never made it to ignite and burn by the material 1185 that ignites automatically.In addition, can the material 1185 that ignite automatically be set in conjunction with the second pilot burner 1112b.
Automatically ignite time limit of igniting of material is to be determined by heat transfer material (such as the device shell) permeability of heat that transmits the first gas generant heat output, distance etc.In this embodiment, the non-azide based gas generant is as gas generant.Being used to transmit at first, the heat transfer material of the heat output of the gas generant of burning is device shell and/or inner circular barrier part.Preferably, the material that ignites automatically is arranged among second combustion chamber near on the position of each housing, and more preferably, the material that ignites automatically is contacted with housing.
Automatically the material that ignites can be arranged among second combustion chamber by bonding, ignites automatically just perhaps that material can be put another container into and container can be placed among second combustion chamber.Preferably, the material that ignites automatically is contacted with heat transfer material.
Automatically in the gas generator that the material that ignites therein is provided with as mentioned above like that, even be that the first gas generant 1109a is burned and the second gas generant 1109b that be arranged among the second combustion chamber 1105b stays in the time of will not burning after triggering gas generator, also might fire second gas generant indirectly owing to the burning of the first gas generant 1109a, and after the starting gas generator, cleaning and restore can be carried out and not have any problem.
The first combustion chamber 1105a and the second combustion chamber 1105b are defined by inner circular barrier part 1104, and inner circular barrier part 1104 is furnished with a through hole 1110, are sealed by a stainless steel plate 1111.Stainless steel plate 1111 is by being adhered to inner circular barrier part 1104 such as the such bond of viscose glue, and 1110 burnings by the second gas generant 1109b of through hole make it to open, and is never made it to open by the burning of the first gas generant 1109a.It is to flow to second combustion chamber 1105b with burn second gas generant 1109b owing to the flame that burning first gas generation agent 1109a causes by through hole 1110 in order to prevent that through hole 1110 gives the osed top reason by stainless steel plate 111.Therefore, if can guarantee so a kind of function, then replace with stainless steel plate 1111 sealing through holes 1110, one can be by because the disrumpent feelings plate that the pressure that causes of burning second gas generant etc. make it disrumpent feelings, peel off, burn or break away from can weld, bonding or heat seal mode is sealed through hole 1110, perhaps the peripheral wallboard of inner circular barrier part 1104 can be provided with a kerf, and perhaps the peripheral wall plate thickness of inner circular barrier part 1104 can be made thinnerly in the part.Secondly, shown among Figure 31, one basically ring-type cover plate 1186 be provided with so that cover the through hole 1110 that is formed on the inner circular barrier part 1104.Particularly in the gas generator among being shown in Figure 31; even burning gases are owing to the burning first gas generant 1109a takes place; because the sealant tape of sealing through hole 1110 is protected by covering plate 1186, so it can be not destroyed owing to burning first gas generant.As mentioned above, in the present embodiment, the through hole 1110 of inner circular barrier part 1104 is opened owing to burning second gas generant only, and will never be opened owing to burning first gas generant.Therefore, even burning gases at first occur among the first combustion chamber 1105a, it also will never flow to the second combustion chamber 1105b, and the gas generant 1109b among the second combustion chamber 1105b is ignited owing to start the second pilot burner 1112b (material 1185 that ignites automatically in some cases burns) and burns.The burning gases that taken place by the second gas generant 1112b flow through because the through hole 1110 that burning second gas generant is opened and flow through the first combustion chamber 1105a, then, are purified and are cooled off and from exhausr port 826 discharges by coolant/fil 822.
In Figure 28, on behalf of a channelling, numeral 823 prevent part, is used to prevent that burning gases from passing through between coolant/fil end surface and the inner surface of diffusion housing top board.
Adaptor union
The invention provides a kind of multiple stage gas generating unit, wherein, comprise in the airbag apparatus of an air bag gas generator one and to comprise many pilot burners, and wherein each cranking signal outputs to each pilot burner from the signal output apparatus that ignites, each pilot burner and the connection error of igniting between the signal output apparatus are eliminated, and airbag apparatus always can be with a required output starting.
The invention provides a kind of multiple stage airbag apparatus, wherein, comprise in the gas generating unit of a multiple stage air bag gas generator one and to comprise many pilot burners, and wherein each cranking signal outputs to each pilot burner from the signal output apparatus that ignites by a lead with adaptor union, adaptor union is set device for limiting, and when ignite signal output apparatus and each pilot burner coupled together by each lead, connecting device separately was defined as special combination.
In other words, airbag apparatus of the present invention is a kind of multiple stage airbag apparatus, comprises a multiple stage gas generator, stores many electric ignition type pilot burners in one device shell; One output unit that ignites is furnished with each pilot burner of equal amount and is used for one and promptly exports each output that a starting signal is given each pilot burner when bump; And many leads with adaptor union, each pilot burner and each output are coupled together by each lead with adaptor union in this airbag apparatus, and described each adaptor union has a device for limiting, has stipulated the pilot burner and a kind of special connection mode of output separately separately.
Device for limiting can be formed on the adaptor union at least one end that is arranged on the lead that connects pilot burner and output, and perhaps device for limiting can be formed on the lead that connects pilot burner and output and be provided with on the guided connector of at least one.
Lead can be provided with identically with the quantity of electric ignition type pilot burner among being arranged on gas generator.The time limit of igniting of each is individually regulated according to the environmental conditions of starting during airbag apparatus among many pilot burners.
When pilot burner comprised a junction branch and is used for that pilot burner is connected in adaptor union, device for limiting can be formed on the connecting bridge of each adaptor union with being connected from output and stretch on the adaptor union of lead of each pilot burner.When output comprises one when the connecting bridge that is interconnected in adaptor union is arranged, device for limiting can be formed on the connecting bridge of each output with being connected from gas generator and stretch on the adaptor union of lead of output.Guided connector can comprise a latch partial sum one jack part, these parts comprise each connecting bridge, device for limiting can be formed on each connecting bridge of latch partial sum jack part of guided connector, and guided connector connects lead that stretches out from gas generator and the lead that stretches out from output.
Each current-carrying part is present in adaptor union and above the connecting bridge, each current-carrying part forms by connection adaptor union and connecting bridge and contacts with each other, so that can be transferred to first pilot burner from the signal that ignites of the signal output apparatus output of igniting.In the case, device for limiting can be by changing shape, quantity and being present at least a being achieved in these several factors of position of the current-carrying part above the adaptor union.Such as, the current-carrying part of adaptor union has the shape of protrusion or recessed shape, and is connected in the current-carrying part that is made for recessed shape or protrudes the connecting bridge of shape.Adaptor union on being arranged on each lead be by Plastic Parts make the time, this Plastic Parts can be furnished with a device for limiting, and many adaptor unions can be joined to one another by device for limiting.Many leads meet at an adaptor union, and this adaptor union is furnished with a device for limiting.
As mentioned above, in the multi-stage gasbag device, be used for lead so that ignite signal output apparatus and pilot burner and transmit cranking signal if having the adaptor union of device for limiting, then might stipulate the special connection mode of a kind of each pilot burner, each adaptor union and each starting output unit.
In this multiple stage airbag apparatus, might adopt a kind of gas generator, it has a cylindrical shape device shell, comprises a diffusion housing, comprises an exhausr port; And a casing, collaborative diffusion housing forms an inner space.Many pilot burners can dispose on the direction identical with device columella line, and are arranged among the casing.
Secondly, the present invention also provides a kind of multistage gas generator for air bag, comprises a device shell, has an exhausr port; Many pilot burners are received among the device shell and remain and started by each electric signal; And gas generant, be received among the device shell and remain and make it burning and/or expand so that gas takes place to trigger by the starting pilot burner, each pilot burner comprises a junction branch in the producer, be used to be connected in and be arranged on each adaptor union that can transmit from each lead termination of an energizing signal of the signal output apparatus output of igniting, and this connecting bridge is furnished with a device for limiting, allows each adaptor union to have only a kind of connection mode.Particularly, this multiple stage air bag gas generator can preferentially be used for the multiple stage airbag apparatus.
In other words, this gas generator has connecting bridge when gas generator is assembled into when the airbag apparatus the inside is gone, be used to be connected in and be arranged on each adaptor union that can transmit from each lead termination of an energizing signal of the signal output apparatus output of igniting, and this connecting bridge is furnished with a device for limiting, makes it possible to just connect an adaptor union.As an example of device for limiting, each current-carrying part in each pilot burner, acceptance comes the cranking signal of self-ignition signal output apparatus, is differing from one another for each pilot burner aspect shape, quantity and/or the position.Under this configuration, have only corresponding specific adaptor union to be connected.In addition, the shape of pilot burner connecting bridge can be made for the shape that just complementally is fitted to this specific adaptor union.Under one situation of back, a groove and/or a projection can be formed on the connecting bridge, so that its position and/or shape differ from one another at each pilot burner place.
As long as it is enough good that this gas generator comprises two or more pilot burner, and be used for starting gas takes place so that the gas generator that air bag (capsule device) is expanded can be solid gas propellant or gas-pressurized.And gas generator can be made for or is suitable for being arranged on driver's one side or is suitable for being arranged on shape on passenger's one side.The structure that this gas generator preferably has causes in the device shell and is provided with and the as many combustion chamber of pilot burner, and the burned and expansion at each pilot burner place of the gas generant among each combustion chamber.
Secondly, the invention provides a kind of method of attachment, be used for connecting the signal output apparatus (output) and can preferentially use pilot burner among above-mentioned multiple stage airbag apparatus of igniting.
That is, the invention provides a kind of method of attachment, connecting one comprises a control setup and is used to send one and ignites signal to many pilot burner and many ignition devices that are included in this gas generator that are included among the gas generator, each pilot burner is connected in an ignition device output unit by a lead with a connector in the method, and the various connection modes of each pilot burner and each output are stipulated by device for limiting.
As for device for limiting, be arranged on current-carrying part on each pilot burner and make to such an extent that be at each pilot burner and differ from one another aspect shape, quantity and/or the position.In addition, device for limiting can be by making adaptor union and connecting bridge so that complementally equipped each other being achieved, and therefore its combination is only one.Particularly, back one situation can be by making a groove and/or a projection is achieved on connecting bridge, and this connecting bridge differs from one another in each its position, pilot burner place and/or vpg connection.
Usually, each module that comprises gas generator and air bag (capsule device) aspect size and dimension according to such as driver's one side or the such position that is set up of passenger's one side and different, but multiple stage airbag apparatus of the present invention no matter the shape and size of module can adopt.Equally, the gas generator that is used for the multiple stage air bag of the present invention can be applied to such as any device that is suitable for driver's one side, passenger's one side and back seat and regardless of the variation of shape and size.
In this multiple stage airbag apparatus, any cranking signal output unit is as long as to comprise many cranking signal outputs all be operable for it, can regulate and this output unit can detect bump and output cranking signal from the output time limit of the cranking signal of each output output.Therefore, the cranking signal output unit detects the bump part as long as it comprises one, and a part that is used to judge the bump degree and controls output signal, just can use, and whether with two parts are made with being integral or separated the structure-irrelevant of making.
In above-mentioned multiple stage airbag apparatus, for pattern is put in the exhibition of optimizing air bag (capsule device), when the cranking signal output unit detects when bump, the output time limit of cranking signal is regulated, and also regulated the starting time limit that is included in each pilot burner among the gas generator.At this moment, is furnished with device for limiting respectively owing to connect each adaptor union of each lead of ignite signal output apparatus and each pilot burner, so sent to specific pilot burner reliably from the cranking signal of cranking signal output unit output, that is, original plan remains the pilot burner that started, and can not cause any variation of airbag apparatus starting ability owing to the connection error of ignite signal output apparatus and pilot burner.Therefore, in this multiple stage airbag apparatus, pattern is put in the exhibition of preferential air bag more reliably.
Adaptor union embodiment
The multistage gas generator of airbag apparatus of the present invention will be illustrated below according to the embodiment that is shown among the drawing.Figure 10 is a vertical cross section view, shows an embodiment of multiple stage airbag apparatus of the present invention.
Be shown in the gas generator that multiple stage airbag apparatus among Figure 10 comprises a multiple stage air bag, contain two pilot burner 108a and 108b, and a cranking signal output unit 102 be used for giving each pilot burner according to bump output cranking signal.Therewith, the gas generator 101 of multiple stage air bag remains by introducing together with one owing to start the air bag 103 that starting gas that gas generator takes place makes it to expand and be housed among the module housing 104.
Cranking signal output unit 102 comprises an impact microphone 105, can detect bump; And a control setup 106, be used for from impact microphone incoming signal and the output cranking signal that ignites.
In having the multiple stage airbag apparatus of above structure, when semiconductor acceleration detector 105 detects bump during at auto against, its signal is sent to control setup 106, and when the bump signal from sensor surpassed certain numerical value, control setup 106 began to calculate.If result of calculation surpasses certain numerical value, then regulated starting time limit, and cranking signal is exported to pilot burner 108a and 108b.Therefore, pilot burner 108a and 108b ignited by starting and each gas generant that burns so that burning gases take place.This gas is injected air bag 103, and air bag breaks through module housing 129 and expand, and then forms a cushion that is used to absorb bump between control wheel 130 and passenger.
From the cranking signal of control setup 106 output is one to be arranged on output 107 outputs among each pilot burner 108a and the 108b among the control setup 106.The number of each output is put should be greater than the quantity of the pilot burner 108 that is included in gas generator 101, that is two or more in the present invention.In order to regulate the starting time limit of each pilot burner, can be exported at different time limit places from each cranking signal of output 107a and 107b.From each cranking signal of output 107a and 107b output by to pass to pilot burner 108a and the 108b that is included among the gas generator 101 with the lead 109a of pilot burner 108a and the same quantity setting of 108b and 109b.In the case, if off-square lead 109 is connected in any pilot burner mistakenly, then can not obtain required starting output.So the lead 109a and the 109b that are used to connect output 107a and 107b and pilot burner 108a and 108b are furnished with adaptor union 110a and 110b, and adaptor union 110a and 110b are furnished with device for limiting.In this configuration, the cranking signal of exporting from the first output 107a is sent to the first pilot burner 108a reliably, and is sent to the second pilot burner 108b reliably from the cranking signal of second output 107b output.Device for limiting can be according to the structure of pilot burner 108 and control setup 106 or be used to be connected pilot burner 108 and output 107 lead 109 shape and make differently.
In the multiple stage airbag apparatus of Figure 10, shown among Figure 11, when adaptor union 110a and 110b are loaded on respectively the lead 109a that stretches out from output 107a and 107b and the termination of 109b, and each adaptor union 110a and 110b be when being connected in the connecting bridge 111a of pilot burner 108a and 108b and 111b, and adaptor union 110a and 110b and connecting bridge 110a and 111b can be furnished with as the device for limiting shown among Figure 12 and 13.When the adaptor union 110 of lead 109 is connected in pilot burner in this way, adopt a current-carrying part, that is a conduction pin 112, it receives the starting output from control setup 106.
In the device for limiting among being shown in Figure 12, each connecting bridge shape differs from one another at each pilot burner place, perhaps a groove and/or a projection make so that its each position and/or each shape differ from one another at each pilot burner place.Under the situation that is shown in the device for limiting among Figure 12 a, each is located groove (or each projection) and is formed on adaptor union 110a and the 110b, and differs from one another at each pilot burner place corresponding to each position of locating each projection (or each groove) 118 places of groove (or each projection) 117.In the device for limiting among being shown in this figure, the position of each adaptor union groove (or projection) 117 differs from one another, so that when adaptor union 110a and 110b were loaded on gas generator, if each adaptor union is not contained on the correct direction, each adaptor union will hinder each other and can not install correctly.In the device for limiting among being shown in Figure 12 b, just an adaptor union 110b is furnished with a location groove (or projection) 119.That is, the one adaptor union 110b with groove (or projection) 119 can be connected in a pilot burner 108a who does not have a projection (or groove) 120, but an adaptor union 110a who does not have groove (or projection) 119 cannot be connected in a pilot burner 108b with projection (or groove) 120.As a result, the connection error of each adaptor union can be found when assembling easily.In Figure 12 c, the shape of adaptor union 110a and 110b connecting bridge 116 differs from one another.In Figure 12 d, two adaptor unions are made for an adaptor union, and make a location groove (or projection) 124.
As the gas generator that is shown among Figure 11, when conduction pin 112 is provided as current-carrying part on the connecting bridge that adaptor union connects the place and the current-carrying part (conduction pin 112) of connecting bridge 111 is connected in the current-carrying part of adaptor union 110 so that electric current can flow the time, shape, quantity or the position of conduction pin 112 can change in each pilot burner, and in view of the above, shape, quantity and the position of adaptor union 110 current-carrying parts can change.
Figure 13 shows a kind of pattern of respectively conducting electricity pin that differs from one another at each pilot burner place.Figure 13 a shows that conduction pin 112 shapes of pilot burner 108a and 108b are different, and Figure 13 b shows that the conduction pin 112 of pilot burner 108a and 108b is formed on the different positions.Each conducts electricity this pattern of pin as long as each pilot burner has the conduction pin that differs from one another and just can suitably be adopted.In the case, shape, position or the quantity of adaptor union 110a and 110b current-carrying part are regulated according to the pattern of pilot burner 108a and 108b conduction pin 112.When pilot burner 108a and 108b conduction pin 112 was formed in as the diverse location place shown among Figure 13 b, adaptor union 110a and 110b also can couple together shown among Figure 13 c like that.
When device for limiting being set as mentioned above when connecting each pilot burner and adaptor union 110a and 110b, adaptor union 110a and 110b preferably design so that be connected in the lead 109a of each adaptor union 110a and 110b and 109b draws on same direction and and then this direction perpendicular to the central axis of device shell.
Secondly, in the multiple stage airbag apparatus among being shown in Figure 10, when the end of lead 109a and 109b is furnished with adaptor union 113a and 113b, and adaptor union 113a and 113b be during as the connecting bridge 114a that is connected to output 107a and 107b shown among Figure 14 and 114b, and adaptor union 113a and 113b and connecting bridge 114a and 114b can be furnished with respectively and be similar to those the device for limiting that is shown in each pilot burner among Figure 12.That is the connecting bridge 114a of output 107a and 107b and the shape of 114b are different at each adaptor union 113a with the 113b place, perhaps are formed in position and/or vpg connection different each groove and/or projection.According to the connecting bridge 114a of output 107a and 107b and 114b in the case, adaptor union 113a and 113b are formed separately processing to have each position and/or to be made for the shape of each groove and/or each projection.Secondly, when conduction pin 115a that has the effect of playing current-carrying part as connecting bridge 114a and the 114b of output 107a and 107b and 115b, conduction pin 115a and 115b can be made for the pattern that is shown among Figure 13.Like this, the adaptor union 113 of lead 109 is connected under the situation of multiple stage airbag apparatus of the signal output apparatus that ignites (control setup 106 among the present embodiment) therein, by being connecting bridge 114a and 114b and adaptor union 113a and the 113b configuration device for limiting of output 107a and 107b, lead 109a is connected in the first output 107a by adaptor union 113a, and lead 109b is connected in the second output 107b by adaptor union 113b.Therefore, when pilot burner 108a and 108b are connected to lead 109a and 109b, be shown in device for limiting among Figure 12 and 13 by configuration, inerrably inputed to the first pilot burner 108a from the cranking signal of first output 107a output, and inerrably inputed to the second pilot burner 108b from the cranking signal of second output 107b output.In this configuration, in the multiple stage airbag apparatus, can obtain required start-up function reliably.
Secondly, during multiple stage air bag among being shown in Figure 10 is provided with, shown among Figure 15, when guided connector (way-connector) 125a and 125b are connected in the centre portion of each lead and each lead when being connected the output 107a of the signal output apparatus that ignites (control setup 106 among the present embodiment) and 107b and multiple stage air bag gas generator (pilot burner 108 among the present embodiment), guided connector 125a and 125b also can be furnished with device for limiting.That is, among device for limiting such as Figure 12 and 13 on the illustrated latch 125a1 and a socket 125a2 who is arranged on guided connector 125a, and on the latch 125b1 and socket 125b2 of guided connector 125b.This device for limiting can be by the shape of adaptor union itself or by forming or not forming recessed or protrusion, perhaps shape by regulating the conduction pin etc. so that latch 125a1 can only be connected in socket 125a2 and latch 125b1 can only be connected in socket 125b2, are achieved.Say that more specifically shown among Figure 16 (a), the position at conduction pin 121 places of latch 125a1 and 125b1 can be set to such an extent that differ from one another at each guided connector 125a and 125b place.In addition, shown among Figure 16 (b), the shape of the conduction pin 121 of latch 125a1 and 125b1 is made at each guided connector 125a and 125b place and is differed from one another.Perhaps as shown among Figure 16 (c), the shape of adaptor union 125a and 125b can be made and differ from one another.Such as, shown among Figure 17, pilot burner 126a and the 126b among being arranged on gas generator can not adopt during each adaptor union of direct connection yet to the method for these guided connectors configuration device for limiting.In other words, when each pilot burner comprises one when being used to connect the connecting bridge of adaptor union, device for limiting can adopt as the method shown among Figure 12 and 13 and be disposed, but, then be difficult to each adaptor union is directly connected in pilot burner 126a and 126b when when lead 127a shown among Figure 17 and 127b are directly connected in pilot burner 126a and 126b.So the lead 127a and the 127b that stretch out from pilot burner 26a and 126b are furnished with adaptor union 128a and 128b in its termination, and guided connector 125a and 125b are connected in each adaptor union.Guided connector 125a is connected in adaptor union 128a and guided connector 125b is being connected in adaptor union 128b if each adaptor union is furnished with device for limiting respectively, and then the cranking signal that sends from the first lead 126a is passed to the first pilot burner 126a reliably and passed to the second pilot burner 126b reliably from the cranking signal that lead 126b sends.
Because above-mentioned structure and method, in this multiple stage airbag apparatus, eliminated the connection error of output and pilot burner, and each pilot burner cranking signal of control setup 106 output 107a and 107b output can pass to required pilot burner from the signal output apparatus that ignites.Therefore, according to this multiple stage airbag apparatus, can obtain required start-up function reliably.
Figure 18 is a vertical cross section view, shows an a kind of embodiment who preferentially is used for the multiple stage airbag apparatus of above-mentioned multiple stage airbag apparatus.That is in this gas generator, the multiple stage air bag is furnished with device for limiting, and the adaptor union 110a that can stipulate to be loaded on the termination that is connected in each lead of signal output apparatus that ignites also can be connected each adaptor union with 110b, just like top described.
In this gas generator, two combustion chamber 133a, b being used to put each gas generant are arranged among the device shell 132, are arranged on that two pilot burner 135a, the b of gas generant 134a, b put wherein among each combustion chamber and be used to burn.Each pilot burner that is arranged among the device shell can be started independently, and when a pilot burner is started, and the gas generant among combustion chamber is ignited and burns.That is, this gas generant adaptive so that combustion chamber 133a, b among gas generant 134a, b only make it to ignite and burn by among two pilot burners 135 any.Therefore,, also just regulated the burning time limit of gas generant 134a, b among each combustion chamber, and because this characteristic if regulated the starting time limit of pilot burner 135a, b, also can the adjustments of gas producer and the start-up function of airbag apparatus.Say that more specifically when the first pilot burner 135a was started, transmission gunpowder 136 was burned, flame is injected the first combustion chamber 133a from first flame transmission eyelet 150 and is received within gas generant 134a among first combustion chamber to ignite and to burn.The second pilot burner 135b and first pilot burner simultaneously or started more a little later, and flame flow is crossed second flame transmission eyelet 150b and is injected second combustion chamber.Second gas generation agent flame thus makes it to ignite and burns with generation starting gas, and this gas flows through the through hole 152 of inner circular barrier part 151 and inject the first combustion chamber 133a.Flow through coolant/fil 137 at gas and be cleaned and cool off and discharge owing to the burning first gas generant 134a and second gas generate starting gas that agent 134b takes place from exhausr port 153.
In this gas generator, can be ignited owing to starting pilot burner 135 and burn can be combined among the pilot burner 135 with the transmission gunpowder 136 of burning gas generating agent effectively.When gas generant 134 burnings have also also produced residues of combustion, can be provided with one and be used for the fil of purification of combustion remnants, and a kind of coolant that is used for cooling combusting gas can be set.In the present embodiment, adopted the coolant/fil 137 that is used to purify with cooling combusting gas.
In this gas generator, two pilot burners are received among each pilot burner lasso 138 respectively and are arranged among the device shell 132.In the pilot burner lasso, the position that pilot burner puts the place is furnished with a junction and divides 139.Each adaptor union 110 of the termination of each lead 109 that stretches out from the signal output apparatus that ignites is connected to each connecting bridge when adopting this gas generator to make airbag apparatus.
In gas generator of the present invention, connecting bridge 139 be furnished with a device for limiting 140 so that many be used for each cranking signal being passed to the adaptor union 110a-b of pilot burner 135a～b from the signal output apparatus that ignites in the middle of, the adaptor union 110a that can be connected to connecting bridge 140 can be stipulated.That is the device for limiting 140 of pilot burner 110a, b is made differently at each pilot burner 110a, b place.Such as, shown among Figure 12, the shape of connecting bridge 139a, the b of pilot burner 125a, b can be made to such an extent that differ from one another, and perhaps can make each groove and/or each projection with diverse location and/or shape.Secondly, shown among Figure 13, the shape, position etc. that put in each pilot burner conduction pin 141 of each adaptor union 139a, b can be set to such an extent that differ from one another at each pilot burner 135a, b place.
Though the gas generator that is suitable for being arranged on driver's one side has been described in the present embodiment, but a kind of long in the axial direction gas generator that is suitable for being arranged on passenger's one side, perhaps a kind of gas-pressurized that adopts replaces the solid gas propellant, as long as gas generator comprises two or more pilot burners, all can adopt.
Two pilot burners can always not be provided with at grade shown among Figure 18, and each pilot burner also can be arranged on the different planes, such as on the upper face and lower surface of gas generator.
Self-constriction formula fil
The filter of a kind of air bag gas generator of the present invention is cylindrical shape on the whole basically, and arbitrary at least axial end surface is made to such an extent that consequently be bevelled and outwards gradually narrow diametrically.This filter is because because of starting the radially outwards expansion of starting gas that gas generator takes place.Because this expansion, filter recline supporting part and/or supporting member in the device shell, and filter shrinks in the axial direction owing to the inclination of end surface, and when the starting gas generator, can prevent the starting gas channelling at filter end surface place.
That is, the filter of air bag gas generator of the present invention is arranged among the device shell of air bag gas generator, and cylindrical filter is used for purifying and/or cooling triggers gas, and one or two axial end surface of filter is made in that axially the interior angle with respect to the interior periphery surface is an acute angle along stretching inclined end portion surface more and more narrow on the direction.Particularly because this filter is because one when the starting gas of starting gas generator that is generation and outwards expand diametrically, so preferably, filter is made by many wire rods, and make diametrically expansible can contract.
This filter comprises anyly having that the body of taking offence is together worn and the filter aperture crossed, such as the fil that when the temperature of gas is very high, is used to cool off starting gas, a kind ofly in addition be used to purify the fil that is included in the residues of combustion of starting among the gas, and a kind of coolant/fil with these two kinds of functions.Filter is a cylindrical shape on the whole basically, and one or two axial end surface of filter is made for the bevelled end surface.Each bevelled end surface tilts to such an extent that consequently narrow down gradually extending axially on the direction of filter.More specifically say, if the top end surface is a bevelled, it tilt so that outwards fall diametrically, and if following end surface is a bevelled, it tilt so that outwards go up diametrically.That is filter comprises a sloping portion, is shaped on a bevelled end surface, and a straight base portion, is connected in sloping portion vertically to form a periphery surface.Sloping portion can be provided with on the both sides that are arranged on straight base portion in the axial direction, perhaps on any side of straight base portion.
This filter can be made to constitute a kind of wire-mesh filter of stratification by being a kind of wire gauze of being made by every kind of wire rod of cylindric ground stratification, then this fil of compression molding.Preferably a kind of stainless steel metal silk screen of example of a wire gauze of making by each wire rod, and, can adopt SUS 304, SUS 310S, SUS 316 (Japanese Industrial Standards' standard) etc. as the corrosion-resistant steel of wire gauze material.SUS 304 (18Cr-8Ni-0.06C) shows good corrosion resistance as a kind of austenitic stainless steel.If this a kind of filter of being made by each wire rod is made to such an extent that expand at least diametrically and shunk, then can obtain further significantly effect.
Secondly, the invention provides a kind of air bag gas generator, be used to adopt above-mentioned filter to prevent to start the channelling of gas effectively.
That is air bag gas generator of the present invention comprises, have in the device shell of an exhausr port one, and an ignition device, one works as bump is promptly started; One gas generant is used for owing to the starting ignition device triggers gas so that airbag inflation; An and cylindrical filter, be used for purifying and/or cooling triggering gas, in this producer, among described fil, one or two axial end surface is made for that the interior angle with respect to the interior periphery surface is an acute angle extending axially bevelled end surface more and more narrow on the direction, and a supporting part that is opposite to the inclined end portion surface of fil is present among the device shell.
As the supporting part that is arranged among this device shell, such as, be opposite to the inner surface of device shell on filter inclined end portion surface, that is filter inclined end portion surface be provided with place and filter be provided with the position axially on the surface, inside, one has the inclined surface with filter inclined end portion surface same tilt degree basically, is made for the supporting part of device shell.In addition, one cleaner supporting spare, has an inclined side that is opposite to fil inclined end portion surface, being arranged on the filter end surface axially goes up among the device shell and make on the side at place on fil inclined end portion surface, and therefore, the inclined surface of filter device supporting member can be above supporting part.
As filter, can use its vertically the end surface of opposite sides thereof be made for a kind of of inclined end portion surface, in addition, can use its any one among the end surface of the opposed both sides of axle to be made for the filter on inclined end portion surface.In other words, this fil comprises that one forms the straight base portion and the sloping portion that is shaped on an inclined end portion surface of periphery surface.Sloping portion is provided with on the one or both sides of straight portion in the axial direction.When adopting when being shaped on the filter on inclined end portion surface (sloping portion), be arranged on each supporting part in the device shell and be arranged on the both sides vertically that filter is provided with the place at its axial two end surface places.When employing was shaped on the filter of inclined surface (sloping portion) at its axial end surface place, the supporting part that is arranged in the device shell was arranged on axially going up of fil and filter inclined surface (sloping portion) side.In this situation be, preferably, one back-up ring with an annular section and an outer periphery wallboard is arranged on the opposed vertically side of device shell internal support part, that is on the opposed side with respect to the inclined end portion surface of filter end surface, and the internal table of back-up ring outer periphery wallboard is in the face of placing the outer peripheral surfaces of filter.Replacing back-up ring is set, is not that filter inclined end portion surface is made external diameter on the end surface at place and can be made more greatly so that the recline surface, inside of device shell periphery wallboard of this end surface.
When the straight portion of not wishing filter expands and be out of shape, such as when wishing between inner surface of device shell and filter outer surface, to guarantee a space, straight portion can be provided with an expansion restraining device at its outer peripheral surfaces place, comprise that one has the stamping metal piece of perforated cylinder shape or a rolling piece to stop its expansion.In the case, just the sloping portion of filter expands, and supporting part (material) and supported by the latter then reclines.
Gas generant of the present invention is not subjected to the restriction of its global shape.Therefore, such as, the gas generator of axially long drum had or have radially that the gas generator of the drum of broad all can adopt.As the ignition device that is arranged in the device shell, as long as it one when the bump promptly started, can adopt any usefulness so that the known pilot burner of starting gas takes place gas generant, all pilot burners that is triggered by a kind of electric signal of the time exporting by bump, perhaps a kind of described pilot burner with because starting pilot burner and being ignited and the combination of the transmission gunpowder that burns.
Be received within and be used among the device shell once starting gas taking place and make some examples of the gas generant of airbag inflation be when the starting ignition device: a kind of solid gas propellant, ignited and burnt so that starting gas to take place by the ignition device that is started; A kind of gas-pressurized is heated and expands and gas has taken place; And a kind of combination.As gas generant, can adopt a kind of usually widely use based on azide base gas generant such as the such inorganic azide of sodium azide, perhaps a kind of non-non-azide based gas generant based on inorganic azide.Secondly, as gas-pressurized, can adopt a kind of known gas such as oxygen and noble gas mixtures.That is gas generator of the present invention can these two be achieved by a kind of pyrotechnic gas generator that adopts the solid gas propellant and a kind of hybrid gas generator that adopts gas-pressurized and solid gas propellant.
Gas generator of the present invention is so starting, promptly after ignition device is started, by gas generant starting gas takes place, and is purified when starting gas flows through filter and cools off, and then, gas is discharged from exhausr port.When starting gas flows through filter, filter expands diametrically owing to start the pressure of gas, but in this gas generator, filter one or two end surface vertically be made for so that outside gradually narrow inclined surface diametrically, and the supporting part with the inclined surface that is opposite to the filter inclined surface is arranged among the device shell.Therefore, the filter inclined surface of the Peng Zhanging supporting part in the device shell that reclines diametrically, and filter is because this inclination and contraction is arranged in the axial direction slightly.Thus, the end surface of filter is effectively made it to be contacted with supporting part under pressure, and can prevent the channelling of starting gas between filter inclined surface (that is end surface) and the supporting part.
Also realized in having the gas generator of said structure: manufacturing cost can be reduced by adopting a kind of starting gas cleaning and/or cooling method, in the method one tilt so that at the device columella among the supporting part that narrows down gradually on the direction of extension is arranged on the device shell, because of starting gas by at the cylindrical filter of radial expansion since the inclination of supporting part can shrink in the axial direction and the supporting part that reclines, thereby and prevent to trigger gas and flow through between filter and the supporting part.
Aforesaid gas generator is received among the module housing together with the air bag that is made it to expand by the gas that gas generator took place (capsule device), and combined with the starting gas generator, thereby constitute airbag apparatus with the impact microphone that is used to detect certain bump at least.In this airbag apparatus, gas generator is started when impact microphone detects bump, thereby discharges burning gases from the exhausr port of device shell.Burning gases flow to air bag so that air bag and break through a module housing and expand and form in passenger and the vehicle cushion between the rigid component and absorb bump.
Self-constriction formula fil embodiment 1
Figure 19 is a vertical cross section view, shows an embodiment of a kind of air bag gas generator of the present invention.Particularly, be shown in gas generator among this figure and be and a kind ofly the pyrotechnic gas generator of starting gas takes place, and have a kind of structure on being longer than axially on its diametric(al) by burning.
In the gas generator among being shown in present embodiment, one have an exhausr port 310 diffusion housing 301 and one and the collaborative casing 302 that forms an inner space of diffusion housing be engaged with each other to constitute a columnar basically device shell 303.One among the inner cylindrical that is provided with many through holes 302 on its peripheral wallboard is arranged on device shell 303 with one heart.The outside of inner circular barrier part is made for one first combustion chamber 305a.The inside of inner circular barrier part comprises that by one the partition 321 of a sealing calotte spare 306 and a circular cut piece 307 is divided into two chambers, and two chambers are located adjacent one another in the axial direction.Chamber near diffusion housing 301 is one second combustion chamber 305b, and another chamber near casing 302 to be an ignition device put chamber 308.Some gas generants 309 are arranged among first and second combustion chambers, and are arranged on some gas generants among each combustion chamber because starting is arranged on each ignition device puts two pilot burner 311a, b among the chamber and ignited independently and burn.
A kind of filter 350 of one embodiment of the present invention is used among the device shell 303.Figure 20 shows a part sectional view of filter 350.Have on the whole in the filter of drum basically, its opposed vertically each end surface is a bevelled, is axially narrowing down gradually on the direction of extension, and to form a bevelled end surface 351, its interior angle θ with respect to the interior periphery surface is an acute angle.Say that more specifically its top end surface tilts to such an extent that consequently outwards fall diametrically, and following end surface tilts to such an extent that consequently outwards go up diametrically.This filter 350 can be wire gauze that cylindric ground stratification made by multiple wire rod with the wire-mesh filter that forms stratification compression molding fil then.As described among Figure 19, filter 350 is arranged among the device shell so that is opposite to the interior periphery surface of device shell 301.One supporting member 353 has an inclined surface 352 that is opposite to filter one inclined end portion surface 351, among the fil end surface is arranged on the device shell on axially.The inclined surface 352 of supporting member 353 plays the effect of a supporting part of filter 350.That is, in this embodiment, adopted its opposed vertically end to be made for the filter on inclined end portion surface 351, and each cleaner supporting device 353 is arranged among the device shell on the opposed vertically both sides of fil.The filter 350 inclined end portion surfaces 351 that the inclined surface 352 of filter supporting member 353 reclines and expands diametrically.
One partition 321, the inside of defining the inner circular barrier part becomes the second combustion chamber 305b and ignition device puts chamber 308, comprises the flat basically tabular circular cut piece 307 of a sealing housing 306 and.One is arranged on the transmission gunpowder of sealing among the calotte spare 306 puts part 312 and combines with it so that stretch out from a bore portions 313 of circular cut piece 307.Partition 321 is engaged in and is fixed in a step otch 314 of inner circular barrier part.Sealing calotte spare 306 comprises one and puts in cylindrical shape that the transmission gunpowder puts an opposed side of part 312 and ignite and put aperture 315, and one second pilot burner 311b is received within pilot burner and puts among the aperture 315.
The first pilot burner 311a and the second pilot burner 311b are received within one to be caused among the lasso 316, and is supported and be fixed in it by a pilot burner connecting element 317 that covers lasso 316.The pilot burner of sealing calotte spare 306 is put aperture 315 and is positioned near the pilot burner connecting element 317, and O shape circle 325 is provided with therebetween.Under this configuration, realized between the first pilot burner 311a and the second pilot burner 311b and the sealing between the second combustion chamber 305b and the device shell.
This gas generator is started as follows, promptly one as the starting first pilot burner 311a, be received within sealing calotte spare 306a transmission gunpowder and put the first transmission gunpowder 318 among the part 312 and ignited and burn, flame enters the first combustion chamber 305a to ignite and to burn the first gas generant 309a from first flame transmission eyelet 319a that is arranged among the inner circular barrier part 304.Be received within ignition device and put the second pilot burner 311b among the chamber 308 and the first pilot burner 311a simultaneously or be later than the first pilot burner 311a slightly and started, flame enters the second combustion chamber 305b from second flame transmission eyelet 319b that is formed on the circular cut piece 307, thereby burns the second gas generant 309b.The starting gas that takes place owing to burning second gas generant enters the first combustion chamber 305a from the through hole 320 that is arranged on the inner circular barrier part 304.
The starting gas that takes place owing to the burning first gas generant 309a and the second gas generant 309b flow through be provided with so that radially around the filter 350 in the first combustion chamber 305a outside, and during this period, collect residues of combustion and refrigerating gas.At this moment, filter 350 is because pressure of starting gas etc. and a little outwards expanding diametrically.Dilated filter reclines and is arranged on the axial filter supporting member 353 of fil and by its supporting, and can prevent to cause starting gas to flow through the starting gas channelling in gap between filter end face surface and the filter supporting member 353.That is filter 350 is a kind of self-constriction formula filters, and self shrinks owing to start passing through of gas.The starting gas that has flow through filter 350 breaks through the sealant tape 322 of sealing exhausr port 310, and emits from the device shell by exhausr port 310.
In the gas generator of present embodiment, can adopt known gas generant 309a, b, transmission gunpowder 318, pilot burner 311a, b etc.
In the present embodiment, might use the filter of on the one side, being furnished with inclined surface as described among Figure 21, that is be a kind of filter 355, it is cylindrical shape on the whole basically, and its end surface vertically is adjusted to bevelled, narrow down gradually on the direction to form an inclined end portion surface 351 extending axially, the latter is an acute angle with respect to the interior angle θ on interior periphery surface.But, in the case, shown among Figure 22, being arranged on 353 of filter supporting members among the device shell 303 is arranged on filter inclined end portion surface 351 and makes on the side at place, and a back-up ring 324, comprise that an annular section 323b and has the panel surfaces part 323a of inside and outside periphery, be arranged on (that is on casing 302 1 sides) on the opposed side.The recline inside surface of back-up ring outer periphery wallboard 323a and, one outer periphery skirt section 354 of filter by its supporting.
In the gas generator among being shown in Figure 22, if starting gas is owing to burning first and second gas generants take place, then when gas when being shown in gas generator among Figure 19 and flowing through filter, starting gas outwards expands filter 355 diametrically.The recline surface, inside of back-up ring 324 outer periphery wallboards of the filter 355 of the Peng Zhanging inclined surface 352 of filter supporting member 353 that reclines at 351 places, its inclined end portion surface radially, outer periphery skirt section 354.Therefore, this filter 355 also becomes a kind of self-constriction formula filter, pass through oneself's contraction owing to be formed in the inclined end portion surface 352 on the end surface of top because of starting gas.
The embodiment 2 of self-constriction formula fil
Gas generator among a kind of Figure 23 of being shown in is characterised in that, an inclined surface 452 tilts to such an extent that consequently outwards narrow down gradually diametrically, is formed on the surface, inside of device shell 403.This inclined surface 452 is formed in the inboard filter inclined surface of device shell vertically and makes on the side at place.In the present embodiment, inclined surface plays the effect of filter one supporting part, and this forms owing to sloping portion, and the latter tilts into a chamfer shape at the periphery edge of device shell 403 1 circular portions 461.
In the gas generator among being shown in this embodiment, device shell 403 comprises that one has the diffusion housing 401 and one and the collaborative casing 402 that forms an inner space of diffusion housing of an exhausr port 410.One columnar basically inner circular barrier part 404 is furnished with many through holes 420 at its peripheral wallboard place, be arranged among the device shell 403, and the outside of cylindrical element forms a combustion chamber 405 and its inboard and forms an ignition device and put chamber 408.A kind of being used for is received among the combustion chamber 405 by the gas generant 409 that starting gas takes place in burning.One ignition device comprises a pilot burner 411 and a transmission gunpowder 418 is arranged on ignition device and puts among the chamber 408.As being shown in it among Figure 21 is that the side place filter 355 of being furnished with inclined surface is disposed radially the outside at combustion chamber 405, that is this filter 355, it is cylindrical shape on the whole basically, and its end surface vertically is a bevelled, narrow down gradually on the direction to form an inclined end portion surface 351 extending axially, the latter is an acute angle with respect to the interior angle θ on interior periphery surface.
Particularly in this embodiment, as the filter supporting member shown among the embodiment 1 be not arranged on filter 355 inclined end portion surfaces 351 axially on.This be because, the inclined surface 452 that filter inclined end portion surface is reclined is provided with place and inclined end portion surface 351 at a filter 355 and makes the position at place and be formed on the device shell.Therefore, in this embodiment, inclined surface 452 plays the effect of the supporting part of filter 355.
In the present embodiment, the diffusion housing 401 that constitutes the device shell comprises circular portion 461, forms a top surface; One sloping portion 453, tilt so that from the outer periphery of circular portion diametrically as an outside expansion of fan; One peripheral wallboard 462 begins bending and stretches downwards from a termination of sloping portion; And a flange portion 463, begin bending from the lower end of peripheral wallboard and radially stretch to outside the device shell.Casing 402 comprises an annular section, and the heart partly locates to be provided with an eyelet 464 therein, wherein comprises inner circular barrier part 404; One peripheral wallboard 466, the device shell axially on rise from the outer periphery edge of annular section; And a flange portion 467, begin bending from the upper end of outer periphery wallboard and radially stretch to outside the device shell.The peripheral part of two housings is engaged with each other by multiple welding method and constitutes the device shell.Diffusion housing 401 is shaped on many exhausr ports 410 and is used for discharging starting gas in its peripheral wallboard surface, and each exhausr port is sealed by moisture seal adhesive tape 422.A kind of can be by the starting gas adhesive tape that makes it to break as sealant tape 422.
In the device shell of so making, the surface, inside of diffusion housing 401 sloping portions 453 also is made for just like same the inclined surface of the such downward expansion of fan, and more specifically says, is made for radially outside and downward-sloping inclined surface 452.Filter 355 is arranged among the device shell 403 so that its inclined end portion surface 351 is opposite to inclined surface 452.Be formed in the inner lip-deep inclined surface 452 of device shell, inclined surface as embodiment 1 filter supporting member, play the effect of filter one supporting member, and recline and support because pass through of gas of starting and the outside filter inclined end portion surface 351 of expansion diametrically.
Equally, in the present embodiment, gas generator among being shown in Figure 22, one ring washer 424, comprise the set within it panel surfaces 423 at portion periphery and outer periphery place of a flat tabular annular section 426 and, be arranged on the side of not making the inclined end portion surface, on the end surface of filter 355.The recline inside surface of back-up ring 424 outer periphery wallboards 423 and, the outer periphery skirt section of filter by its supporting.
According to the gas generator that is shown in this figure, when pilot burner 411 is started, the transmission gunpowder 418 that is arranged on pilot burner 411 tops is ignited and is burnt, and flame internally the through hole 420 of cylindrical element 404 injected the combustion chamber 405 that wherein puts gas generant 409.The flame that injects the transmission gunpowder 418 of combustion chamber ignites and burning gases propellant 409, thereby is used to make the starting gas of airbag inflation.This starting gas is cleaned when it flows through filter 355 and cools off, and breaks through sealant tape 422 and discharge from exhausr port 410.
When starting gas flow through filter 355, filter radially outwards expanded owing to pressure.If filter 355 radially outwards expands, its inclined end portion surface 351 inclined surface 452 on the inner surface of device shell that reclines, and might prevent the channelling of starting gas between the inner surface of filter end surface (inclined end portion surface 351) and device shell.
Therefore, in the gas generator among being shown in this embodiment, because filter inclined end portion surface 351 is pressed in the inclined surface 452 on the inner surface of device shell, so might prevent the channelling of starting gas on filter 355 end face surface one special member need be set and be used to support filter 355.
Equally, in this gas generator, can adopt a kind of known gas generant 409, transmission gunpowder 418, pilot burner 411 etc.
Self-constriction formula fil embodiment 3.
Figure 24 shows a kind of air bag gas generator of another embodiment of the present invention.Be shown in the gas generator among Figure 24, gas generator among being shown in Figure 23, the surface, inside of one device shell 503 is shaped on inclined surface 552a, b, and the inclined end portion surface 551a, the b that are arranged on the end surface of filter 550 are supported by inclined surface 552a, b.
Gas generator among being shown in embodiment 2 is shown in gas generator among the present embodiment and adopts and be furnished with each inclined end portion surface 551 at its each axial end surface place.The inclined surface 551 that is formed on each axial end surface opposite sides thereof of filter tilts to such an extent that consequently radially outwards narrow down gradually, top end surface 551a tilts to such an extent that consequently outwards fall diametrically, and following end surface 551b tilts to such an extent that consequently outwards go up diametrically.The bottom of the filter of present embodiment is made to such an extent that consequently can radially outwards expand.
Inclined surface 552a, the b that can support filter 550 is formed on the surface, inside of device shell 503 so that is opposite to inclined end portion surface 551a, the b of filter.Particularly in this embodiment, because filter is furnished with each inclined end face surface 551 at the opposite sides thereof place of its each axial end surface, be formed in diffusion housing 501 inner surfaces and casing 502 inner surfaces above the two so be opposite to inclined surface 552a, the b of filter 550 inclined end portion surface 551a, b.More specifically say, diffusion housing 501 and casing 502 are as using multiple sheet metal to make by compression molding among the embodiment 2, and each sloping portion 553 is provided with at filter 550 each inclined surface on the side at place and is formed on the housing, that is in the present embodiment the diffusion housing 501 and casing 502.In Figure 24, sloping portion 553a, b are formed in the diffusion housing 501 between a circular portion 561 and the peripheral wallboard 562, and in the casing 502 between an annular section 565 and the peripheral wallboard 566.
The two is made for each inclined end portion surface 551 the upper and lower end surface of filter 550.Filter 550 is arranged among the device shell so that top inclined end portion surface 551a is opposite to diffusion housing 501 inner surperficial inclined surface 552a, and following inclined end portion surface 551b is opposite to the inclined surface 552 of casing.One dilation 556 that expand diametrically, the filter bottom be provided with so that the recline surface, inside of casing periphery wallboard 566 of the outer periphery of this dilation.
According to the gas generator of the present embodiment of so making, when transmission gunpowder 518 because starting pilot burner 511 and ignited and when burning, the flame through hole 520 of cylindrical element 504 internally injects combustion chamber 505, thereby ignites and burning gases propellant 509.The starting gas that takes place owing to burning gases propellant 509 is cleaned when gas flows through filter 550 and cools off, and gas breaks through sealant tape 522 and discharges from exhausr port 510.Filter 550 radially expands owing to start passing through of gas, and be arranged on the lip-deep inclined surface 552a in inside, the b that inclined surface 551a, b on the filter 550 upper and lower ends recline and be arranged on two housings, and might prevent the channelling of starting gas between filter 550 end surfaces and the device shell 503 inner surfaces.
Particularly in the gas generator among being shown in Figure 24, the outer periphery of filter 550 lower expansion part is contacted with the surface, inside of device shell periphery wallboard 566.Therefore, when filter 550 since starting gas pass through to expand the time, its part is contacted with the surface, inside of device shell periphery wallboard, and might suppress further to be out of shape and to control expanded size.Under this preparation, might stably guarantee the contact condition between filter 550 and the inclined surface 552.
About present embodiment, wherein the upper and lower inner surface of device shell be furnished with so that the gas generant of the inclined surface that narrows down gradually diametrically can adopt a kind of structure that is shown among Figure 25.
Except layout and quantity such as each combustion chamber and each pilot burner, the gas generator that is shown among Figure 25 is with a kind of difference that is shown among Figure 24, an one diffusion housing 601 and a casing 602 are joined together by friction welding, and the filter (Figure 20) of not being furnished with dilation at place, its underpart is used as filter 650.Figure 26 is the diagrammatic plan view that is shown in the air bag gas generator among Figure 25.
In the gas generator of this embodiment, diffusion housing 601 has an exhausr port 610 and casing 602 has a flange portion 667, is engaged with each other by friction welding, thereby constitutes a device shell 603.Aperture, one top osed top cylinder device shell 625 is arranged among the device shell 603 prejudicially with respect to device shell central axis.The outside of inner casing 625 forms one first combustion chamber 605a, and the inboard of inner casing 625 forms one second combustion chamber 605b.Each electric ignition type pilot burner 611 remains by the telecommunications work song with starting, and each gas generant 609a, b remain because each pilot burner of starting and ignited and burn all is received within respectively among combustion chamber 605a, the b.Particularly, shown among Figure 26, the pilot burner 611a among the first combustion chamber 605a is arranged on the inboard of the inner circular barrier part 604 that the transmission of a flame wherein eyelet 619 is provided with prejudicially with respect to peripheral wallboard.One transmission gunpowder 618 remains to be ignited and burnt by pilot burner 611a, is arranged on pilot burner 611a top.Be not arranged among the second combustion chamber 605b though transmit gunpowder in the drawings, can be provided with when needing.
Inner casing 625 has defined the first combustion chamber 605a and the second combustion chamber 605b, with and be furnished with a peripheral wallboard of a bore portions 660.Bore portions is sealed by a sealant tape 622 or analogue.Be used for the sealant tape 622 of closed orifices part 660 or analogue make so that can owing to burning be received among the second combustion chamber 605b the second gas generant 609b and by explosion, peel off, burn or throw off.Bore portions 660 is made to such an extent that consequently it can be owing to gas generant 609a among the burning first combustion chamber 605a opens.
In the gas generator among being shown in Figure 25, device shell 603 engages diffusion housing 601 by rubbing and casing 602 is made.Diffusion housing 601 is shaped on a sloping portion 653a, and it tilts to such an extent that consequently narrow down gradually towards top surface 661 from peripheral wallboard 662.Casing 602 also is shaped on a sloping portion 653b, and it tilts to such an extent that consequently narrow down gradually towards lower surface 665 from peripheral wallboard 666.The surface, inside of sloping portion 653a, the b of two housings is each inclined surface 652, be opposite to each inclined end portion surface 651 of filter 650, and these inclined surfaces 652 plays the effect of the supporting part of filter 650.In the drawings, sloping portion 653a, b make by bending each housing, but also may make each sloping portion by crooked each housing.
As the filter 350 shown among Figure 20, its upper and lower end respectively is shaped on inclined end portion surface 651, is arranged among the device shell 603.In the drawings, filter 350 be provided with so that its inclined end portion surface, top 351 be opposite to the inclined surface 652a of diffusion shell, and its following inclined end portion surface 351 is opposite to the inclined surface 652b of casing 602.
In this gas generator, when the first pilot burner 611a was started, the first transmission gunpowder 618 was ignited and is burnt.The flame of transmission gunpowder 618 is discharged from the direction of representing with the arrow among Figure 26 so that flame comes out and centers on inner casing 625 from the flame that is provided with prejudicially with respect to inner circular barrier part 604 transmission eyelet 619.The flame of discharging from flame transmission eyelet 619 ignite and the first combustion chamber 605a that burns among gas generant 609a.The second pilot burner 611b and the first pilot burner 611a are simultaneously or move back in it slightly and started.The second gas generator 609b among the second combustion chamber 605b is ignited owing to start pilot burner 611b and is burnt, thereby starting gas takes place.Be arranged on the inner casing 625 peripheral wallboards bore portions 620 owing to the starting gas pressure be opened.By means of this aperture, the starting gas that takes place owing to the burning second gas generant 609b flows to the first combustion chamber 605a.
Because the starting gas that the burning first gas generator 609a and the second gas generator 609b are taken place is cleaned when gas flows through fil 350 and cools off, and gas breaks through sealant tape 622 and discharge from exhausr port 610.Equally, in the gas generator among being shown in this figure, filter 350 radially outwards expands owing to start passing through of gas, be formed in inclined end portion surface 351 on the upper and lower end surface and be pressed in inclined surface 652a, b in the device shell, that is supporting part, and might prevent between filter 350 end surfaces and the device shell 603 inner surfaces channelling of starting gas.
Self-constriction formula fil embodiment 4
Figure 27 is a vertical cross section view, shows another embodiment of gas generator that adopts filter of the present invention.The gas generator that is shown among this embodiment is longer than its internal diameter in the axial direction.
In the gas generator among being shown in Figure 27, a filter puts container 702 (after this being called " filtering container "), puts filter 750 therein, is connected in the aperture, an end 730 of a cylindrical element 701 vertically, thereby constitutes a device shell 703.Aperture, the other end 731 is sealed by an annular element 732, and an ignition device container 704 is set among the latter.
In the device shell, gas generant 709 remains burning so that starting gas to take place, and is received among the cylindrical element 701.The effect of the combustion chamber 705 that gas generant burns is therein played in the inner space of cylindrical element 701.One circular porous plate 733 launches on diametric(al), is arranged in the combustion chamber 705 on the end on filtering container 702 1 sides.Gas generant 709 among the combustion chamber 705 is supported by porous plate 733.
Ignition device container 704 is fitted among the annular element 732, and sealing puts in an end surface of combustion chamber 705.One ignition device puts chamber 708, separates with combustion chamber 705, is arranged on this end surface inboard.Ignition device comprises a pilot burner 711 and a transmission gunpowder 718, is received within ignition device and puts among the chamber 708.Many flame transmission eyelets 719 are formed on the peripheral wallboard of ignition device container 704, and the flame that takes place owing to the starting ignition device injects combustion chamber 705 from each flame transmission eyelet 719, thereby ignite and burning gases propellant 709.
Filtering container 702 is drum on the whole basically, its vertically the periphery edge of opposed each end surface be shaped on each sloping portion 753, be made for like chamfer shape and tilt so that container axially on narrow down gradually.One through hole 734 is formed on the end surface of filtering container 702 on device shell one side, is used for gas generator is installed on module and surface, the other end is provided with a thru-bolt 735.Many exhausr ports 710 are formed on the peripheral wallboard.The inner space of filtering container 702 is communicated in combustion chamber 705 via the through hole 734 that is formed on the device shell end surface.In the drawings, the formation of filtering container 702 be because, comprise that with one device that sloping portion 753 and contains the end surface 739 of thru-bolt 735 covers the smooth beginning portion that seals the cup-shaped spare that comprises a peripheral panel surfaces 736, a sloping portion 753 and a device shell-side end surface 737.
Be shown in the filter of the present invention 350 among Figure 20, that is be basically on the whole drum and tilt so that each inclined end portion surface 351 of on axial direction of extension, narrowing down gradually be formed in a kind of filter on its opposed vertically each end surface, be received among the filtering container 702.Filter 350 be provided with so that its inclined end portion surface 351 be opposite to the surface, inside of filtering container 702 sloping portions 753 that is inclined surface 752.One gap 741 has a predetermined width, guarantees between the interior wall plate surface of filter outer peripheral surfaces and filtering container 702.
In starting during this gas generator, when pilot burner 711 during by starting, transmission gunpowder 718 is ignited and is burnt, and its flame injects combustion chamber 705 from the flame transmission eyelet 719 of ignition device container 704.Gas generant 709 is made it to ignite and burn by transmission gunpowder 718 flames that inject combustion chamber, thereby starting gas takes place.Starting gas flows to filtering container 702, and is cleaned when gas flows through filter 350 and cools off, and discharges from exhausr port 710.Because filter 350 is flow through in starting, filter 350 expands on diametric(al), its inclined end portion surface 351 supporting part (that is inclined surface 752) that on the surface, inside of filtering container 702 sloping portions 753, reclines, and shrink in the axial direction.As a result, filter 350 effectively is pressed in the surface, inside of filtering container 702, and might prevent to start the channelling of gas by between two members.
A kind of gas generator with many pilot burners
Secondly, the present invention comprises a kind of air bag gas generator, comprises a device shell, has many deflation holes and forms an outer hull container and put two or more ignition device so that one ignite at once when bump; And a kind of gas generant, ignited independently and burn so that be used to make the burning gases of air bag bulging by ignition device, each exhausr port is sealed by sealing arrangement so that the internal pressure of device shell is remained in setting pressure in the producer, and by control each exhausr port and/or sealing arrangement, thereby be used for a disrumpent feelings pressure of disrumpent feelings sealing arrangement and can eliminate the difference of device shell maximum internal pressure when each ignition device is triggered in a plurality of stage adjusted.
Figure 32 is a vertical cross section view, shows a kind of air bag gas generator that meets another embodiment of the present invention.Being shown in gas generator among this embodiment has equally and a kind ofly is particularly suitable for being configured on driver's one side.
What specifically, be shown in that gas generator among this embodiment is characterised in that a kind of two combustion chambers is provided with configuration and a kind of method for making among the device shell.
Equally in the present embodiment; be formed in the deflation hole 1210 of diffusion on the housing 1201 and have two kinds of different exhausr port 1210a of diameter and 1210b, and these exhausr ports are all sealed by sealant tape 1229 so that atmosphere gas propellant 1252 is not subjected to such as the such such environmental effects of the humidity outside the device shell.By two kinds of different exhausr port 1210a of internal diameter (and orifice area) and 1210b are set, press (smooth combustion performance) in the burning in the time of can the balance starting among the device shell 1203.
That is, in being shown in than the gas generator among the embodiment, in a cylindrical shape device shell 1203-this device shell is to be used for forming the casing 1202 of an inner storage space and these housings being used friction welding and obtain with diffusion housing 1201 by engaging a diffusion housing 1201 and with many exhausr ports 1210, the cylindrical shape inner casing 1204 that has an annulus and have a bottle cap shape of a closed upper end on the horizontal section dispose prejudicially with respect to the central axis of device shell and fix, thereby forms one first combustion chamber 1250 in the inner casing outside and at inner casing inboard formation one second combustion chamber 1260.
The inner casing 1204 that is configured among the device shell 1203 can suitably be changed according to required volume ratio of combustion chamber etc. with respect to the degree of eccentricity of device shell 1203, and can be according to device shell 1203 in-to-in structures, such as whether having coolant/fil 1225, and changed.As an example, the gas generator among being shown in this figure when coolant/fil 1225 disposes to such an extent that be opposite to a peripheral panel surfaces of device shell 1203, might suitably be selected degree of eccentricity in the scope between one 10 and 75%.But, because this scope can be changed because of the size of pilot burner 1251 and 1261 etc., so this scope just is shown in a kind of appraisal of inner casing 1204 degree of eccentricitys in the gas generator among Figure 32.
Inner casing 1204 can be made with multiple shape aspect the horizontal section, such as rectangle, Long Circle etc., so that be engaged in casing 1202 etc. easily, preferably makes with toroidal.In other words, the horizontal cross sectional geometry of inner casing 1204 must be a toroidal when engaging inner casing 1204 and casing 1202 by friction welding, and equally when engaging by laser welding, and transmitting range that must maintenance laser is constant.
As noted above, in this embodiment, first combustion chamber 1250 and second combustion chamber 1260 are defined by inner casing 1204.That is first combustion chamber 1250 is arranged on the outside of inner casing 1204, and second combustion chamber 1260 is arranged on the inboard of inner casing 1204.Volume ratio between first combustion chamber 1250 and the second combustion chamber 1260 (volume of first combustion chamber: the volume of second combustion chamber) be set at 3.3: 1 in the present embodiment, and it also can be suitably 1: selected in 1 to 1: 1.1 the scope.But, still about volume ratio, selected scope can suitably be changed owing to the shape of the size of pilot burner 1251,1261 and gas generant 1252,1262.Therefore, above scope shows the scope that can select in the gas generator structure in being shown in figure.
As noted above, gas generant 1252,1262 stores respectively among second combustion chamber 1260 and first combustion chamber 1250 separated by inner casing 1204.Respectively, first gas generant 1252 stores among first combustion chamber 1250 and second gas generant 1262 stores among second combustion chamber 1260.In the present embodiment, first gas generant 1252 and second gas generant 1262 are of similar shape etc.The gas generant that differs from one another aspect various at least one in burning velecity, composition, ratio of component and quantity each side can store among combustion chamber separately.
Inner casing 1204 has defined first combustion chamber 1250 and second combustion chamber 1260, dispose prejudicially with respect to device shell 1203 central axis, and second combustion chamber 1260 that is arranged on inner casing 1204 inboards is accentrics with respect to device shell 1203.Each pilot burner is configured among first combustion chamber 1250 and second combustion chamber 1260 respectively, be configured in second pilot burner 1261 among second combustion chamber 1260 be arranged on respect in device shell 1203 central axis accentrics second combustion chamber 1260 in the heart.Therefore, owing to triggering flame that pilot burner 1261 takes place second gas generant 1262 that can burn equably.And second pilot burner 1261 and be arranged among first combustion chamber 1250 first pilot burner 1251 the two all dispose prejudicially with respect to device shell 1203 central axis.As noted above, green phase disposes first and second pilot burners and inner casing 1204 prejudicially for device shell 1203 central axis, can do greatlyyer in the difference scope aspect first and second volumes ratio of combustion chamber, and the size of device shell 1203 on diametric(al) can be limited as much as possible.
In each pilot burner among disposing combustion chamber separately, the pilot burner 1251 that is configured among first combustion chamber 1250 has a transmission gunpowder 1208, is configured on the periphery and upper direction of combustion chamber.Convenience when assembling gas generator, perhaps in order to prevent to transmit gunpowder because bump that applies when being contained on the vehicle and vibration and at random among first combustion chamber 1250, and for the performance of igniting that prevents first gas generant 1252 incurs loss, transmission gunpowder 1208 stores among a transmission gunpowder container 1226.Transmission gunpowder container 1226 since combustion arrangement therein transmission gunpowder 1208 and make by aluminium and to be easy to break with a certain thickness (such as about 200 μ m) so that the flame biography to its periphery.On the other hand, a kind of transmission gunpowder in second combustion chamber 1260, might not needing among being configured in first combustion chamber 1250.This be because, second gas generant 1262 is ignited than being easier to compared with first gas generant 1252, and the pressure of second combustion chamber constantly increases under sealing state till until an eyelet 1206 that is used to seal the following stated inner casing 1204 disrumpent feelings 1207 broken.Even disrumpent feelings 1207 does not break when the interior pressure of combustion chamber 1250 increases owing to burning first gas generant 1252 yet, but when more increasing, the interior pressure that the inner pressure ratio of second combustion chamber 1260 plays first combustion chamber 1250 can break.Can use the transmission gunpowder when but, needing.
One cylindrical element 1236 is placed among first combustion chamber 1250 so that centers on first pilot burner 1251 outside diametrically and the transmission gunpowder 1208 that is arranged on the pilot burner top.Cylindrical element 1236 is made for a drum of freely opening at place, upper and lower two ends, and one end thereof is fitted to the outer periphery of the part that pilot burner 1251 is housed from the outside so that does not form the gap.And the other end is set to such an extent that supported so that be fixed on a predetermined position by a ring washer 1211 that is arranged on diffusion housing 1201 top interior near surfaces.Many flames transmission eyelets 1237 are formed on the peripheral wallboard of cylindrical element 1236, and because the flame that burning transmission gunpowder 1208 takes place penetrates from flame transmission eyelet 1237 consequently ignites and first gas generant on being arranged on outside the cylindrical element of burning.Preferably, cylindrical element 1236 is by making with device shell 1203 material identical materials.
Specifically, in the gas generator among being shown in this embodiment, first combustion chamber 1250, shown in a plane of perspectivity view among Figure 33, be made for an annular that is similar to crescent-shaped that obtains by the inboard of stamping one circle roundly, and first gas generant 1252 is placed on wherein.Therefore, different with second combustion chamber 1260 in first combustion chamber 1250, the distance between gas generant 1252 and the pilot burner 1251 becomes along with being used to store the position of gas generant 1252.Therefore, when igniting pilot burner 1251, igniting and burning of first gas generant 1252 carried out equably.Then, flame transmission eyelet 1237 is arranged on the inner circular barrier part 1236 peripheral wallboards, has limited flame direction so that the flame of guiding transmission gunpowder 1208 on the direction shown in the arrow among by Figure 33.So, might be in a part that covers by second combustion chamber 1260 (that is inner casing 1204) burning gases propellant 1252 equably.Secondly, replace inner circular barrier part 1236, can adopt to have to be formed in an injection direction restraint device (not shown) of some eyelets on the direction shown in the arrow among Figure 33.The injection direction restraint device can limit owing to the direction that triggers the jet flames that first ignition device (pilot burner 1251 among Figure 32 and transmission gunpowder 1208) takes place first gas generant 1252 that is used to ignite, so that burn first gas generant 1252 effectively.As the injection direction restraint device, such as, can be a cup-like containers, an end sealed by a cylindrical element and therein a nozzle that is used for going up guiding ignition device flame in required direction (by the direction shown in the arrow among Figure 33) be arranged on a peripheral wall plate portion.In the case, the injection direction restraint device is used in and installs to such an extent that surround under the state of (covering) first ignition device.Equally under the situation that adopts above injection direction restraint device, preferably dispose within it first ignition device of side comprise pilot burner and the transmission gunpowder that is ignited and burn owing to trigger pilot burner.
The inner casing 1204 that has defined first combustion chamber 1250 and second combustion chamber 1260 is made for a bottle cap shape of as above pointing out, and many bore portions 1205 are formed on its peripheral wallboard.Bore portions 1205 design so that just first gas generant 1252 that can not store owing to burning among first combustion chamber 1250 is opened because burning stores that second gas generant 1262 among second combustion chamber 1260 just is opened.In the present embodiment, bore portions 1205 comprises and manyly is arranged on the eyelet 1206 on the inner casing 1204 peripheral wallboards and is used to seal disrumpent feelings 1207 of eyelet, and a kind of corrosion-resistant steel sealing tape is as disrumpent feelings 1207.Design for disrumpent feelings 1207 consequently just owing to burning second gas generant 1262 is just broken, peels off, burns out or remove so that open eyelet 1206, but can not broken owing to burning first gas generant 1252.
Above inner casing 1204 is freely opened bottom 1213 by the connection one and is fixed in casing 1202.When casing 1202 comprised the lasso part 1202a that is used for fixing pilot burner, inner casing 1204 can be loaded on lasso part 1202a.In the gas generator among being shown in Figure 32, casing 1202 make so that engage one with being integral and have and can be fixed on the circular lasso part that is engaged on the circular cylindrical shell part 1202b lower surface that spreads housing 1201 to two pilot burners, and inner casing 1204 is engaged in lasso part 1202a.Lasso part 1202a can be with on the round-formed lower surface that is formed in circular cylindrical shell body portion 1202b integratedly that can be fixed at each pilot burner place, and can be formed on the lower surface of circular cylindrical shell body portion 1202b with being integral.Under such a case, except the lasso part 1202a of casing, inner casing 1204 can directly be contained on the lower surface of circular cylindrical shell body portion.
In the present embodiment, the joint of inner casing 1204 and casing 1202 except friction welding, crimping operation, resistance welding etc., can be achieved by a kind of concavo-convex joint.Particularly, engaging by friction welding under the situation of the two, preferably under the state of fixing casing 1202, realizing.So, even when the two axial centre part of inner casing 1204 and casing 1202 is not in alignment with each other, also can stably carry out friction welding.In other words, be at fixing inner casing 1204 and rotate when carrying out under the state of casing 1202 in friction welding, thereby the centre-of gravity shift of casing 1202 is opened center of turn and can not be carried out stable friction welding.Therefore, in the present invention, friction welding is at fixing casing 1202 and rotates under the state of inner casing 1204 and carry out.Secondly, when friction welding, preferably locate and fixing casing 1202 so that always inner casing 1204 is contained in a position of determining.So preferably a location device suitably is arranged on the casing 1202.One gas generant connecting element 1214 be configured among the inner casing 1204 in case safely with successfully realize being connected to casing 1202.Using of gas generant connecting element 1214 is in order to prevent that gas generant 1262 is at friction welding inner casing 1204 direct contact inner casing 1204 and lay the space in order to obtain as pilot burner 1261 in the interior volume that is formed by inner casing 1204 during in casing 1202.When inner casing 1204 is installed in casing 1202, except above friction welding, also may waits and install by a kind of concavo-convex joint and crimping operation, resistance welding.In the case, adopt gas generant connecting element 1214 also to improve the assembling performance.As an example, gas generant connecting element 1214 is taked a metal cylinder cover at this, make and have the thickness that can be destroyed easily by aluminium owing to burning gases propellant 1262, secondly, take a suitable member, can reach above-indicated purpose (regardless of material, shape etc.), such as a kind of porous member of making by wire gauze.In addition, when not using above gas generant connecting element 1214, might make gas generant by a single group hole circle tubular gas generant 1262 being made for the shape identical with inner casing 1204 inner spaces obtain and it is placed among the inner casing 1204.In the case, can remove gas generant connecting element 1214 from.
In the present embodiment, the lasso part 1202a of casing 1202 makes with the size that can fix two pilot burners 1251 and 1261 in the horizontal direction.So, two pilot burners 1251 and 1261 are fixed in lasso part 1202a by crimping operation etc. earlier, then, this lasso part 1202 is shaped on circular cylindrical shell body portion 1202b with being integral so that forms casing 1202, thereby and two pilot burners 1251 and 1261 can be fixed in casing 1202.In the drawings, first pilot burner 1251 draws with identical size with second pilot burner 1261, and but, they can structurally design to such an extent that consequently have different output at each combustion chamber place.Secondly, in this embodiment, a cable 1215 is connected in each pilot burner 1251 and 1261 so that transmit energizing signal, draws on same direction.
One coolant/fil 1225 is used to purify and cool off the burning gases that take place owing to the burning gases propellant as filter among being configured in device shell 1203.The two all flows through coolant/fil 1225 owing to the gas separately that takes place of burning first and second gas generants.In order to prevent channelling, that is, prevent that burning gases from passing through between coolant/fil 1225 end surfaces and the inner surface of diffusion housing 1225 top plate portion, the upper and lower interior periphery surface of coolant/fil 1225 and the surface, inside of device shell can cover with a kind of cylindrical shape channelling with inward flange and prevent part.Particularly, in the gas generator among being shown in Figure 32, a kind of self-constriction formula coolant/fil 1225 is in the outside convergent that directly makes progress at upper and lower two ends.One gap 1228 is though a latus rectum of burning gases is formed in the outside of coolant/fil 1225.
Such as, in the gas generator among being shown in Figure 32, pilot burner 1251,1261 and inner casing 1204 dispose prejudicially with respect to device shell 1203.In above gas generator, when diffusion housing 1201 and casing 1202 were engaged by friction welding, the joint of two housings can be by fixing casing 1,202 one sides and stably being achieved when the friction welding.Specifically, when inner casing 1204 directly is loaded on casing 1202 by friction welding, shown among Figure 32, preferably, one flange portion 1232 that is used for gas generator is installed on module housing is arranged on casing 1,202 one sides, and a localization part is formed on the part that constitutes flange portion 1232, such as, one by making its periphery edge formation otch make an outshot 1233 etc.Under situation about making in this way, owing to casing 1202 is always determined to be fixed on the localization part on the direction one, so inner casing 1204 can be installed in a position of determining reliably.
In with the gas generator made from upper type, when first pilot burner 1251 among being configured in first combustion chamber 1250 that is arranged on inner casing 1204 outsides was triggered, first gas generant 1252 among the combustion chamber 1225 was ignited and burns so that burning gases take place.One minim gap obtain between inner casing 1204 and coolant/fil 1225 and this gap permission gas flow between coolant/fil 1225 and inner casing 1204, thereby and, burning gases can effectively utilize all surfaces of fil 1225.Burning gases are cleaned when flowing through coolant/fil 1225 and cool off, and after this discharge from exhausr port 1210.
On the other hand, when second pilot burner 1261 among being configured in inner casing 1204 was triggered, second gas generant 1262 was ignited and burns so that burning gases take place.Burning gases are opened the bore portions 1205 of inner casing 1204 and are flow to first combustion chamber 1250 from bore portions 1205.After this, it flows through coolant/fil as the burning gases of first gas generant 1252 are done, and discharges from exhausr port 1210.Sealing tape 1229 has sealed exhausr port 1210, is broken owing to the passing through of burning gases of being taken place in the device shell 1203.Second gas generant 1262 is ignited owing to second pilot burner 1261 that has been triggered and is burnt, and will never be directly burned once working as burning first gas generant 1252.This be because, the bore portions of inner casing 1,204 1205 just can be owing to burning first gas generant 1252 is opened because burning second gas generant just is opened.
In with the gas generator made from upper type, the time limit of igniting of two pilot burners is regulated to such an extent that consequently trigger second pilot burner 1261 or trigger first pilot burner 1251 simultaneously and second pilot burner 1261 after triggering first pilot burner 1251, and thereby the way of output of gas generator (operating characteristic) can leave selectively to be regulated consequently, such as vehicle under the such multiple condition of speed, the ambient temperature in when collision, can in the following airbag apparatus of pointing out, the most compatibly be engaged in the bulging of air bag.Specifically, in the gas generator among being shown in Figure 32, two combustion chamber configuration diametrically, thereby the height of gas generator can be limited as much as possible.
In the same gas generator among being shown in this figure, many exhausr ports 1210 that are formed on the device shell 1203 structurally design so that its orifice diameter and/or orifice area be controlled at two or multiple within.Therefore, the difference that the device shell is pressed in the most following when each ignition device is triggered is eliminated, and presses in when gas generator is started to be able to balance, and a kind of air bag gas generator with smooth combustion performance so just is provided.Secondly, same in meeting the gas generator of this embodiment, seal the thickness of tape such sealing arrangement 1229 so that regulate disrumpent feelings pressure by changing such as a kind of by the orifice area of each exhausr port 1210 is set at unmodified, can eliminate the difference of device shell maximum internal pressure when each ignition device is triggered.Secondly, might control the orifice diameter of exhausr port 1210 and/or these two aspects of thickness of orifice area and sealing arrangement 1229 certainly.
Claims (3)
1. method of making multistage gas generator for air bag, producer has a cylindrical shape device shell, and the device shell comprises a diffusion housing, has many exhausr ports that are formed on the cylinder side wall, and a casing forms an inner space with the diffusion housing; Be arranged on the many combustion chambers that are used to put gas generant among the device shell; Ignition device is arranged on and is used to ignite in each combustion chamber and the burning gases propellant, and wherein the device shell is by engaging the diffusion housing with friction welding and casing is made, and friction welding is carried out when casing is fixed.
2. according to the method for the described manufacturing multistage gas generator for air bag of claim 1, wherein one within it the side inner shell that is formed with a combustion chamber be arranged among the device shell, and inner shell is engaged in casing by friction welding when inner shell is provided with prejudicially with respect to device shell central axis, perhaps friction welding is carried out when casing is fixed.
3. according to the method for claim 1 or 2 described manufacturing multistage gas generator for air bag, wherein casing comprises that a flange portion is used for gas generator is installed on a module housing, flange is formed with a localization part, and casing is by being fixed with localization part location casing.
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3790999 | 1999-02-16 | ||
| JP37909/99 | 1999-02-16 | ||
| JP57127/99 | 1999-03-04 | ||
| JP78306/99 | 1999-03-23 | ||
| JP165924/99 | 1999-06-11 | ||
| JP167317/99 | 1999-06-14 | ||
| JP265998/99 | 1999-09-20 | ||
| JP342150/99 | 1999-12-01 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN008043655A Division CN1216759C (en) | 1999-02-16 | 2000-02-15 | Gas generator for multi-stage air bag and air bag device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1721236A true CN1721236A (en) | 2006-01-18 |
Family
ID=35911962
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100848276A Expired - Lifetime CN100335317C (en) | 1999-02-16 | 2000-02-15 | Multistage air bag apparatus, connector and multistage gas generator for air bag |
| CNA2005100848295A Pending CN1721236A (en) | 1999-02-16 | 2000-02-15 | Method for manufacturing multistage gas generator for air bag |
| CNB2005100848280A Expired - Lifetime CN1326726C (en) | 1999-02-16 | 2000-02-15 | Gas generator for air bag and air bag apparatus |
| CNB2005100848261A Expired - Lifetime CN100439159C (en) | 1999-02-16 | 2000-02-15 | Filtering device, gas generator for air bag, air bag apparatus and method for purifying triggering gas |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100848276A Expired - Lifetime CN100335317C (en) | 1999-02-16 | 2000-02-15 | Multistage air bag apparatus, connector and multistage gas generator for air bag |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100848280A Expired - Lifetime CN1326726C (en) | 1999-02-16 | 2000-02-15 | Gas generator for air bag and air bag apparatus |
| CNB2005100848261A Expired - Lifetime CN100439159C (en) | 1999-02-16 | 2000-02-15 | Filtering device, gas generator for air bag, air bag apparatus and method for purifying triggering gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (4) | CN100335317C (en) |
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| CN113200013A (en) * | 2020-01-16 | 2021-08-03 | 宁波均胜汽车安全系统有限公司 | Safety air bag |
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| TWI449639B (en) * | 2011-11-28 | 2014-08-21 | Mosa Ind Corp | Hybrid inflator of airbag |
| CN105184896B (en) * | 2015-10-08 | 2019-01-15 | 珠海市杰理科技股份有限公司 | Collision detecting device, the automobile data recorder comprising it and collision detection processing method |
| JP6933527B2 (en) * | 2017-08-14 | 2021-09-08 | 株式会社ダイセル | Gas generator |
| JP7066850B2 (en) * | 2018-07-10 | 2022-05-13 | オリンパス株式会社 | Phototherapy support device, phototherapy system and phototherapy support method |
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| JPH0658370U (en) * | 1993-01-20 | 1994-08-12 | 日本精工株式会社 | Starter |
| JP2700100B2 (en) * | 1993-05-28 | 1998-01-19 | 日本工機株式会社 | Igniter |
| US5847310A (en) * | 1993-12-28 | 1998-12-08 | Nippon Kayaku Kabushiki-Kaisha | Squib for an air bag with an auto ignition composition |
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| JP2989788B2 (en) * | 1996-10-31 | 1999-12-13 | ダイセル化学工業株式会社 | Gas generator and airbag device for airbag |
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2000
- 2000-02-15 CN CNB2005100848276A patent/CN100335317C/en not_active Expired - Lifetime
- 2000-02-15 CN CNA2005100848295A patent/CN1721236A/en active Pending
- 2000-02-15 CN CNB2005100848280A patent/CN1326726C/en not_active Expired - Lifetime
- 2000-02-15 CN CNB2005100848261A patent/CN100439159C/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113200013A (en) * | 2020-01-16 | 2021-08-03 | 宁波均胜汽车安全系统有限公司 | Safety air bag |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100439159C (en) | 2008-12-03 |
| CN1326726C (en) | 2007-07-18 |
| CN1721234A (en) | 2006-01-18 |
| CN100335317C (en) | 2007-09-05 |
| CN1721235A (en) | 2006-01-18 |
| CN1721233A (en) | 2006-01-18 |
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