CN101041347A

CN101041347A - Air bag gas generator and air bag apparatus

Info

Publication number: CN101041347A
Application number: CN 200710096761
Authority: CN
Inventors: 中岛祯浩; 大路信之; 岩井保范; 胜田信行
Original assignee: Daicel Chemical Industries Ltd
Current assignee: Daicel Corp
Priority date: 1998-09-28
Filing date: 1999-09-28
Publication date: 2007-09-26
Also published as: CN101112888B; CN101041346A; CN101112888A

Abstract

The present invention provides an air bag system or, specifically, a gas generator including two or more combustion chambers, namely a gas generator for air bag formed by enclosing an ignition means operated by impact and a gas generating means generating combustion gas which is ignited by the ignition means and burned so as to expand an air bag in a housing havingn a gas exhaust port, characterized in that two combustion chambers which store a gas generating means are provided in the housing concentrically and adjacently to each other in the radial direction of the housing, a communicating hole enabling these combustion chambers to communicate with each other is also provided in the housing, wherein two ignitors are included, two different gas generating means are included, an ignitor having a lead wire is included, combustion chambers and igniting means are provided in an internal cylindrical member, and an automatic firing material is included, whereby occupants can be arrested effectively.

Description

The gas generator and the airbag apparatus that are used for air bag

The application is to be that September 28, application number in 1999 are 200510008129.8, name is called dividing an application of " gas generator and the airbag apparatus that are used for air bag " applying date.

Technical field

The present invention relates to a kind of gas-bag system; it is confining guard (restrain) rider effectively; specifically; relate to the gas generator that comprises two or more combustion chambers; the gas generator that comprises two firing units comprises the gas generator of two kinds of gas with various generating devices, comprises the gas generator of the firing unit with lead; the gas generator that is included and have the gas generator of combustion chamber and igniting element in the cylinder element and comprise auto ignition material.

Background technology

Be installed in the gas-bag system in the various vehicle that comprise automobile, be used for when vehicle high-speed crash, utilize fast aeration air bag (airbag) thus to prevent the rider owing to damage on the hard thing as bearing circle, Windshield etc. of inertial impaction in the vehicle.This gas-bag system generally includes the gas generator that bumps and start and discharge gas owing to the vehicle, and introduces gas with inflatable air bag.

Even when rider's physique (for example; no matter the height of its sitting height; no matter be adult or child etc.), sitting posture (for example; posture before bearing circle) difference; also require this gas-bag system can protect the rider safely, also suggestion also can start when applying an as far as possible little impact airbag system in the starting stage that starts.Such gas-bag system is described in JP-A 8-207696, among the US-A 4998751 and 4950458.JP-A 8-207696 has proposed a kind of gas generator, and one of them firing unit makes two kinds of generation of gas agent capsules igniting produce gas with minute two-stage.US-A 4998751 and 4950458 discloses a kind of gas generator, and the startup of two combustion chambers with the control gaseous producer wherein is provided, thereby divides two-stage to produce gas by the burning expansion of gas generant.

Yet these gas generators all have shortcoming, and as the inner structure complexity, volume of a container is big, and manufacturing cost is high.

Furtherly, a kind of gas generator is disclosed in JP-A 9-183359 and DE-B 19620758, two combustion chambers of stored-gas propellant are provided in a casing, firing unit is arranged in each combustion chamber, regulating the run up time of each firing unit, thus the output of adjustments of gas producer.Yet, in any gas generator,, being difficult to assembling (manufacturing) because the firing unit that is arranged in the respective combustion chamber is to be provided with separately, the complex structure volume of gas generator itself is doted on greatly.

Of the present invention open

Therefore; the invention provides a kind of gas generator; it can apply an as far as possible little collision in the starting stage of its startup and start, the output of adjustments of gas producer and increase time of output in a wide range, even when rider's physique (for example; no matter the height of its sitting height; no matter be adult or child etc.), sitting posture (for example, the posture before bearing circle) difference, also can protect the rider safely; and can limit the overall dimensions of container, have simple structure and be easy to make.

The gas generator that is used for air bag of the present invention is provided with two combustion chambers at casing, it is characterized in that the structure of two set combustion chambers.Specifically, also can light a fire respectively and light the generation of gas element that is contained in each combustion chamber by different igniting elements.

According to the present invention, a kind of gas generator that is used for air bag is provided, be included in the casing of one or more gas discharge outlets, the igniting element that can start because of collision, thereby can and light the generation of gas element that produces the burning gases that make airbag aeration by the igniting element igniting, wherein, in casing, to such an extent as to be used for two combustion chambers of stored-gas generating device radially adjacent one another are at casing is set with one heart, the intercommunicating pore that can be communicated with is set between combustion chamber.

Furtherly, according to the invention provides a kind of gas generator with air bag, comprise the igniting element that can start because of collision, thereby can and light the generation of gas element that produces the burning gases that make the airbag aeration in the casing by the igniting element igniting, cylindrical and the axle core length of casing is greater than its external diameter, wherein, in casing, be provided with in the axial of casing and/or radially adjacent one another are with one heart to such an extent as to be used for two combustion chambers of stored-gas generating device, the intercommunicating pore that is communicated with between the combustion chamber is set.

Can constitute like this,, form a cylindrical combustion chamber and an annular combustor to such an extent as to two combustion chambers are provided with one heart in the axial of casing and/or radially adjacent one another are.

As mentioned above, by in casing, forming two combustion chambers, can make the inner structure of gas generator simply and respectively light gas generant in the respective combustion chamber.

The burning gases that the above-mentioned gas generating device is produced by its burning make airbag aeration with the protection rider.Therefore, thus comprise that when lighting the generation of gas element by firing unit igniting and the flame assistant lighted, the burning gases that produced by the burning of flame assistant are used to light the generation of gas element, are not directly used in and make airbag aeration when igniting element.At this on the one hand, both all can distinguish clearly mutually.Furtherly, two combustion chambers in the casing are specifically designed to the stored-gas generating device.At this on the one hand, even igniting element comprises the flame assistant, and the flame assistant is installed in the space (calling supply room in the following text) of qualification, and the combustion chamber of this flame assistant supply room and stored-gas generating device also can be distinguished clearly mutually.

When the igniting element that is used to light a fire and light the generation of gas element comprised the two or more firing unit that can start because of collision, in order to install easily, preferably causing at one provided in the axial direction the firing unit of alignment mutually in the ring.Furtherly, when also comprising because of the startup of firing unit, igniting element lighted a fire and during the flame assistant lighted, the flame assistant that preferably will be used for each firing unit separates, and by each firing unit separated ignition and lighting, the flame that the flame assistant of a firing unit is produced can directly not make the flame assistant igniting of any other firing unit.Because this structure, for example, can be in separate firing unit supply room the set-point firearm, and the flame assistant is set in the firing unit chamber, the flame assistant perhaps is set, the startup that the flame assistant can the response point firearm and light a fire and light in separate combustion chamber.

As mentioned above, when the flame assistant of each firing unit is separated, be stored in two generation of gas elements in the combustion chamber and be separately positioned on the torch ignition that the flame assistant burning of appropriate section produces and light.Like this, because the flame assistant in each part is lighted in response to the startup of firing unit, the generation of gas element in each supply room is lighted respectively, and the startability of gas generator can randomly be controlled.

Therefore, by utilizing the structure of gas generator of the present invention, by changing the corresponding igniting timing (timing) of each firing unit, the flame assistant of corresponding each firing unit can be lighted respectively, can stagger when the igniting of the generation of gas element in each combustion chamber and comburimeter (staggered), therefore, the randomly output of adjustments of gas producer.

When two combustion chambers are set in casing, combustion chamber can firing unit axially on be provided with, another combustion chamber can upwards be provided with in the footpath of igniting element.When it is characterized in that wanting the startability of adjustments of gas producer, when being time dependent gas discharge rate, be loaded in have at least in burning velecity, composition, proportion of composing and the amount of two generation of gas elements in the combustion chamber one different, corresponding generation of gas element can be in the optional time by the ground igniting with light.Furtherly, in each combustion chamber, can produce the generation of gas element of gas with various amount in the storage unit time.

As the generation of gas element, except that based on the inorganic azide that has been widely adopted-as sodium azide-the nitrine gas generant, can also use not non-nitrine gas propellant based on inorganic azide.Yet from a security point of view, the non-nitrine gas propellant is preferred, as non-nitrine gas generation composite, can use, for example, comprise itrogenous organic substance, as tetrazolium, triazole or its slaine, oxygen containing oxidant is as the composite of alkali nitrates, use triaminoguanidine nitrate, carbonohydrazides (carbohydroazide), nitroguanidine, etc. act as a fuel and nitrogenous source, use the nitrate, chlorate, perchlorate of alkalies or alkaline earth composite as oxidizer.Can suitably select the generation of gas element according to requirements such as burning velecity, avirulence, combustion temperature, decomposition initial temperatures.In respective combustion chamber, use when having the generation of gas element of different burning velecitys, can use and have different the composition or the different generation of gas element of composition ratio itself, for example, can use as the inorganic azide of inorganic sodium azide or as the non-azide of nitroguanidine and act as a fuel and nitrogenous source.In addition, can use by the composite profile being changed over ball shape, sheet shape; The generation of gas element that hollow circle tube, dish, single hole body or porous body get, or change the generation of gas element that its face area obtains by changing the formed body size.More particularly, when the formation of generation of gas element had the porous body of a plurality of through holes, the setting in hole was not particularly limited, yet, for the performance of stabilizing gas producer, the distance that is preferably formed between external end and the hole heart equates substantially with distance between each center, hole.Specifically, for example on cylindrical cross-sectional plane, preferred construction is such, and a hole is arranged on central authorities, and around six holes were arranged on, the center in each hole such as was at the summit of the equilateral triangle of pitch of holes.Furtherly, 18 holes that center on a centre hole also can be set by this way.Yet the quantity in hole and structure can be determined according to manufacturing complexity, manufacturing cost and the performance of gas generant, have no particular limits.

In above-mentioned two combustion chambers, this cooling element of cooling element that the combustion chamber that is arranged on radial outside can be included in the box perispore side is to be that purpose is arranged in the casing with cooling and/or purifying by the burning gases that the gas generant burning produces.For example, except that the cooling vessel of the filter of purifying burning gases commonly used and/or cooling combusting gas, can also use the wire gauze of making by suitable material, again the filter that obtains of punch forming through forming the wire gauze of annular, stratiform.The laminated metal silk screen can preferably form cylinder by the stainless steel cloth with flush joint (plain stitch), again an end of cylinder is repeatedly rolled over outwardly to form an annular lamina, then, lamina punch forming in a die head is obtained, perhaps form cylinder by stainless steel cloth with flush joint, from radial punch at cylinder to form plate body, the cylindrical shape that plate body is rolled into stratiform is to form lamina, punch forming obtains in die head then.Furtherly, can use at the outside and inboard cooling vessel with dual structure of different stratiform wire gauzes, it has the function of the inboard cooling element of protection and suppresses the function that outside cooling element expands.In this case, can support the neighboring of cooling element with skin to limit its expansion as laminated metal silk screen body, perforated cylinder body, endless belt body.

In a kind of like this gas generator: the different streams of burning gases in each combustion chamber that are stored in two generation of gas element burning generations in the combustion chamber reach gas discharge outlet, to such an extent as to be stored in a generation of gas element in the combustion chamber not can because of the burning gases that produce in another combustion chamber by direct-fire with light, generation of gas element in the combustion chamber burns in mode fully independently in each combustion chamber, therefore, the generation of gas element is lighted a fire and is lighted in failure-free mode more in each combustion chamber.So even obviously stagger the run up time of two firing units, the flame of generation of gas element can not lighted the generation of gas element in second combustion chamber yet in by first combustion chamber of the firing unit igniting that at first starts, to such an extent as to can obtain stable output.For example, can directly introduce cooling element with the formation stream and with the burning gases that produce in first combustion chamber by stream formation element is set in casing, thereby obtain this gas generator.

Above-mentioned casing can obtain like this: by methods such as casting, forging or punch formings, formation has the diffusion shell of one or more gas discharge outlets and forms the capsul of storage area with the diffusion shell, and connects two shells.The connection of two shells can realize by various welding methodes, as electricity bundle (electronicbeam) welding, laser welding, TIG flash welding, projection welding etc.Form diffusion shell and capsul by various steel plate punch formings and can make manufacturing process simple, reduce manufacturing cost as stainless steel sheet.Furtherly, two hull shapes are become simple shape,, can make the punching press of shell easier as cylindrical shape.As for the material of diffusion shell and capsul, corrosion-resistant steel is preferred, and nickel-plate steel plate also is an acceptable.

In above-mentioned casing, also having installed can be because of detecting the igniting element that collision starts, lights a fire and lights the generation of gas element.In gas generator of the present invention, as igniting element, use electronic ignition type igniting element, this igniting element is activated because of the electric signal from the crash sensor of detecting collision.Electronic ignition type igniting element comprises a firing unit, this firing unit is started by the electric signal from electronic sensor, sensor utilizes as electricity mechanisms such as semiconductor acceleration sensors and comes special detecting collision, igniting element also comprises a flame assistant, and the flame assistant is lighted a fire by the startup of firing unit and lighted.

The above-mentioned gas generator that is used for air bag is contained in the module cover with air bag (bag), with gas and the inflation of introducing the gas generator generation, thereby forms airbag apparatus.In this airbag apparatus, gas generator starts when the collision alarm that detects in response to crash sensor, and burning gases are discharged from the gas discharge outlet on the casing.Burning gases flow into air bag, and air bag breaks the module lid and inflates, and form air cushion with the collision between hard thing and the rider in the absorption vehicle.

Below another aspect of the present invention will be described.Above-described parts and its combination will be utilized aspect corresponding.The feature of respective parties face will be described below.

Next, the gas generator that comprises two or more combustion chambers is described.

A kind of gas generator is provided, can different timing (timing) and or energy under light generation of gas element in each combustion chamber, can also make the generation of gas element igniting that is stored in each combustion chamber and light at different timing (timing).

That is to say, according to the present invention, the igniting element that can be activated because of collision has been installed in having the casing of gas discharge outlet, be characterised in that by igniting element igniting and the gas generator of lighting and produce the generation of gas element of the burning gases that make airbag aeration: in casing, limit one or two or a plurality of combustion chamber that is used for the stored-gas generating device, be stored in generation of gas element in each combustion chamber and light a fire individually by the igniting element in each combustion chamber and light, be stored in generation of gas element in each combustion chamber at least at burning velecity, shape, form, one of composition ratio and amount are different from the generation of gas element in another combustion chamber.

For example be provided with in casing under the situation of two combustion chambers, combustion chamber can be provided with like this: they are provided with one heart, to such an extent as to upwards adjacent one another are in the footpath of casing, and intercommunicating pore is set between combustion chamber.

As mentioned above, at least in the generation of gas element that one of burning velecity, shape, composition, composition ratio and amount are different from another combustion chamber is stored in a plurality of combustion chambers in the casing, therefore, the startability of gas generator, the amount of particularly discharging gas over time can be by lighting a fire in the optional time and lighting the generation of gas element and regulate respectively.In each combustion chamber, can load the different generation of gas element of gas flow that takes place in the unit time.Like this, under the situation of the gas generator that is used for gas of the generation of gas element of use identical type, its startability is according to determining clearly the run up time of the igniting element in each combustion chamber in different combustion chambers.Yet, when having loaded the generation of gas element of the combustion characteristic (as burning velecity, shape, composition, composition ratio and amount) that can provide different mutually in the combustion chamber, according to the present invention, even the run up time of igniting element is identical, the also startability of adjustments of gas producer freely.Therefore, when run up time of point of adjustment firearm with when being stored in generation of gas element in each combustion chamber, can be on a large scale the startability of adjustments of gas producer subtly.Particularly in changing each combustion chamber under the situation of the shape of generation of gas element, can realize by the thickness or the face area that change the generation of gas element, under the situation of the amount of generation of gas, the weight that is stored in the generation of gas element in each combustion chamber can be different from other chamber in changing each combustion chamber.

In aforesaid gas generator, in casing, define a plurality of combustion chambers, and when having loaded generation of gas element in the different combustion chambers with different burning velecitys, burning velecity (Vs) with respect to the generation of gas element that stores the medium and small burning velecity of any combustion chamber, be stored in the burning velecity (Vl) of the generation of gas element of the large-scale combustion speed in another combustion chamber, ratio (Vl/Vs) can be adjusted to greater than 1 to less than in 14 the scope.For example, under the situation that casing is separated into two combustion chambers (i.e. first and second combustion chambers), in first combustion chamber and second burning, the first generation of gas element and the second generation of gas element are set respectively, the burning velecity of the first generation of gas element and the second generation of gas element can be adjusted to (mm/ second) in 3: 40 to 40: 3 the scope.

Furtherly, when having loaded respectively in a plurality of combustion chambers when having difform generation of gas element, be stored in a generation of gas element in the combustion chamber and can on thickness and/or face area, differ from one another with the generation of gas element that is stored in another combustion chamber.For example, if in each combustion chamber, use the generation of gas element of different-thickness, with respect to little thickness (Ts) the generation of gas element that is stored in the combustion chamber, be stored in heavy gauge (Tl) the generation of gas element in another combustion chamber, ratio (Tl/Ts) can be adjusted between 1 to 100.More particularly, when in casing, limiting first combustion chamber and second combustion chamber, and the first generation of gas element and the second generation of gas element are set in first combustion chamber and second combustion chamber respectively, the ratio of the thickness of the thickness of the first generation of gas element and the second generation of gas element can be adjusted between 0.1: 10 to 10: 1.0.In perforated cylinder shape generation of gas element, the thickness of generation of gas element can utilize method shown in the embodiment to measure.

When in a plurality of combustion chambers, having loaded the different generation of gas element of unit weight face area respectively, with respect to little face area (Ss) the generation of gas element that is stored in the combustion chamber, be stored in high surface area (Sl) the generation of gas element in another combustion chamber, ratio (Sl/Ss) can be adjusted to greater than 1 to less than in 50 the scope.

As mentioned above, in a plurality of combustion chambers, stored in the gas generator of generation of gas element of difformity and/or amount, when axially being shorter than it and radially (for example being arranged on chaufeur gas generator at one's side) of gas generator, the total surface area (TS1) that is stored in a generation of gas element in the combustion chamber and the ratio that is stored in the total surface area (TS2) of the gaseousness element in another combustion chamber (TS1: TS2) can be adjusted in 1: 50 to 50: 1 the scope; When axially being longer than it and radially (for example being arranged on passenger's gas generator at one's side) of gas generator, can be adjusted in 1: 300 to 300: 1 the scope.

Under the situation of the amount of the generation of gas element in changing each combustion chamber, when axially being shorter than it and radially (for example being arranged on chaufeur gas generator at one's side) of gas generator, the total weight (g) that is stored in a generation of gas element in the combustion chamber (TW1) with (TW2) ratio of the total weight (g) that is stored in the generation of gas element in another combustion chamber (TW1: TW2) can be adjusted in 1: 50 to 50: 1 the scope; When axially being longer than it and radially (for example being arranged on passenger's gas generator at one's side) of gas generator, can be adjusted in 1: 300 to 300: 1 the scope.

Form at the generation of gas element under the situation of porous body, when in each combustion chamber, using different generation of gas elements, perforated cylinder shape generation of gas element (as the seven apertures in the human head cylindrical shape) can be stored, bill of store hole circle tubular generation of gas element in another combustion chamber in a combustion chamber.

In a plurality of combustion chambers in the gas generator of stored-gas generating device, the burning gases that can not produce because of another combustion chamber when one of them combustion chamber are during by direct-fire, and the generation of gas element in each combustion chamber can be lighted fully separately in each combustion chamber.Therefore, in this case, failure-free mode separated ignition and light generation of gas element in each combustion chamber more.So, even under situation about obviously staggering the run up time that is stored in the igniting element in the different combustion chambers, the flame that produces gas in the combustion chamber of being lighted a fire by starting ignition element at first can not lighted the generation of gas element in other combustion chamber, the stable operation that therefore obtains output.

Furtherly, according to the present invention, in aforesaid gas generator, provide the gas generator that is used for air bag, wherein in casing, placed two or more igniting elements, it is characterized in that on the casing gas discharge outlet and as the combination of the packing element of the sealing band of confining gas discharge orifice.

That is to say, the invention provides a kind of gas generator that is used for air bag, has the igniting element that two or more can start because of collision, can and light and produce the generation of gas element of the burning gases that make airbag aeration by igniting element igniting, with and on have the casing of a plurality of gas discharge outlets, casing has formed outer casing container, wherein, gas discharge outlet is sealed so that box house pressure is maintained predetermined level by packing element, the fracture pressure that packing element is broken can be divided multistage adjusting by gas discharge outlet and/or packing element, thereby when each igniting element is activated, the maximum internal pressure that suppresses casing is poor, in two or the many combustion chambers each all is mounted with the generation of gas element, the generation of gas element is at burning velecity, shape, form, at least one aspect of composition ratio and amount is different, the time separated ignition that the generation of gas element in each combustion chamber can be chosen wantonly and lighting.

The invention provides a kind of gas generator that is used for air bag, in having the casing of gas discharge outlet, comprise: the igniting element that can start because of collision, and can be by igniting element igniting and light and produce the generation of gas element of the burning gases that are used to make airbag aeration, it is characterized in that: in casing, the combustion chamber of two stored-gas generating devices provides with one heart, to such an extent as to the footpath at casing is upwards adjacent one another are, the intercommunicating pore that can be communicated with is set between combustion chamber, is mounted with respectively at burning velecity in two combustion chambers, shape, form, proportion of composing with the amount in have a different generation of gas element at least.

The present invention also provides a kind of gas generator that is used for air bag, in having the casing of gas discharge outlet, comprise: the igniting element that can start because of collision, and can be by igniting element igniting and light and produce the generation of gas element of the burning gases that are used to make airbag aeration, it is characterized in that: in casing, the combustion chamber that is used for the stored-gas generating device is separated into two or more chambers, be stored in generation of gas element in each chamber by the firing unit separated ignition in each chamber and lighting, and in unit time produces the generation of gas element of the gas of different amounts in each chamber.

As mentioned above, when in casing, providing a plurality of combustion chambers and when being mounted with different generation of gas elements respectively, be stored in each combustion chamber the generation of gas element by different igniting elements at the same time or a period of time back separated ignition and lighting at interval.The thickness of the opening diameter (perforated area) by the control gaseous discharge orifice and/or the sealing band of confining gas discharge orifice, the pressure in the time of can making the burning of generation of gas element in the casing (calling the burning internal pressure in the following text) evenly and make combustion performance stable.In this gas generator, each in two or more combustion chambers all is mounted with the generation of gas element, produces the gas of different amounts from each combustion chamber respectively with in unit time.The adjusting of above-mentioned fracture pressure can realize by opening diameter and/or perforated area that two or more gas discharge outlets are set.Therefore, consider the diameter of two perforates adjacent one another are of the gas discharge outlet of two or more perforates, the ratio of preferred major diameter gas discharge outlet and minor diameter gas discharge outlet is 4/1 to 1.1/1, and the ratio of perforated area is 97/3 to 3/97.Furtherly, can regulate fracture pressure by the thickness that two kinds of packing elements are set.Therefore, consider two kinds of thickness of two kinds of packing elements, the preferred ratio of thickness is 1.1/1 to 12/1.

Furtherly, in gas generator of the present invention, be mounted with different generation of gas element mutually in a plurality of combustion chambers respectively, the opening diameter of gas discharge outlet and/or perforated area can be provided with two or more, and the thickness of packing element also can be provided with two or more.Again furtherly, packing element is preferably and comprises that thickness is that sealing layer and the thickness of 20 to 200 μ m is the tack coat of 5 to 100 μ m or the sealing band of adhesion layer.In the present invention, the thickness of sealing band is meant the thickness that comprises sealing layer and tack coat or adhesion layer.In packing element as sealing band, can regulate fracture pressure by the size and/or the thickness of gas discharge outlet, but be not to be the maximum internal pressure (calling the burning maximum internal pressure in the following text) in adjustments of gas generating device when burning casing and the combustion performance of gas generating device.

The gas generator that describes below comprises two combustion chambers.

According to the present invention, as a solution, a kind of gas generator that is used for air bag is provided, in having the casing of gas discharge outlet, has the igniting element that can start because of collision, by the igniting element igniting with light and produce the generation of gas element of the burning gases that make airbag aeration, wherein, igniting element comprises two or more firing units that can start because of collision, and firing unit is in axially alignment mutually.That is to say, the gas generator that is used for airbag aeration provided by the invention comprises: in the casing of band gas discharge outlet, the igniting element that can start because of collision, by igniting element igniting with light and produce the generation of gas element of the burning gases that make airbag aeration, wherein, igniting element has two firing units that can start because of collision, and firing unit connects into an integral body by resin.

Furtherly, according to the present invention, provide a kind of gas generator that is used for air bag, two or more firing units of the igniting element of the above-mentioned gas generator that is used for air bag are installed in one to be caused in the ring, and alignment mutually in the axial direction.

Again furtherly, according to the present invention, a kind of gas generator that is used for air bag is provided, and two or more firing units of the igniting element of the above-mentioned gas generator that is used for air bag so constitute: firing unit forms an integral body by resin, and alignment mutually in the axial direction.

Furtherly, according to the present invention, two or more firing units of the igniting element of the above-mentioned gas generator that is used for air bag form an integral body by resin, and be installed in one and cause in the ring, and alignment mutually in the axial direction.

As mentioned above, in gas generator of the present invention,, in the time of on the control unit that firing unit is connected to airbag apparatus, can pull out lead from same direction on same plane and be used for connecting because two or more firing units that align mutually in the axial direction are provided.

Furtherly, when two or more firing units are installed in one when causing that ring is gone up and/or forming integral body with resin, the fitting operation of assembling gas generator becomes easy.

Furtherly,, do not need to make in advance the interior shape that causes ring consistent, as long as it is just enough greater than the size of firing unit at least to cause the inner space of encircling with the profile of firing unit when two or more firing units are installed in one when causing ring and going up.In addition, when resin in the firing unit forms one when whole, no matter the gas generator of which kind of pattern all need not the firing unit retaining element.

According to the present invention, as a kind of alternative solution, a kind of gas generator that is used for air bag is provided, in having the casing of gas discharge outlet, has the igniting element that can start because of collision, by igniting element igniting with light and produce the generation of gas element of the burning gases that make airbag aeration, wherein igniting element comprises two or more firing units that can start because of collision, and firing unit forms an integral body by resin.

According to the present invention, as an alternative solution again, a kind of gas generator that is used for air bag is provided, in having the casing of gas discharge outlet, has the igniting element that can start because of collision, by igniting element igniting with light and produce the generation of gas element of the burning gases that make airbag aeration, wherein igniting element comprises two or more firing units that can start because of collision, and firing unit is installed in one to be caused in the ring.

As mentioned above, cause in the ring because two or more firing unit forms an integral body by resin or is installed in one, it is easy that the installation of gas generator becomes.

Further go up and says, according to the present invention, provide a kind of gas generator that is used for air bag, two or more firing units of the igniting element of the above-mentioned gas generator that is used for air bag are caused at one by resin and form integral body in the ring.

Therefore, in the time of when two or more firing units are fixed on an initiation ring by resin in, do not need to make in advance the interior shape that causes ring consistent, as long as the inner space of initiation ring is just enough greater than the size of firing unit at least with the profile of firing unit.In addition, when resin in the firing unit forms one when whole, no matter the gas generator of which kind of pattern all need not the firing unit retaining element.

In gas generator of the present invention, as igniting element, electronic ignition type igniting element because of from detecting collision the electric signal actuation signal of crash sensor etc.) be activated.Electronic ignition type igniting element comprises the electric signal of exporting based on the electron type sensor and is activated, the electron type sensor only utilizes the electricity mechanism detecting collision as semiconductor acceleration sensor, also comprises the flame assistant of lighting a fire and lighting because of the startup of firing unit.

At the gas generator that is used for air bag of the present invention, element the element in such scheme is not particularly limited, the similar elements of the known gas generator that is used for air bag also can adopt, and any improvement of being undertaken by those skilled in that art to these elements is all included.

Therefore, the gas generator that is used for air bag of the present invention can so be constructed: for example comprise two or more igniting elements, two or more generation of gas elements (two or more combustion chambers and gas generant), they are by corresponding igniting element separated ignition and lighting, thereby produce the burning gases that make airbag aeration.

The gas generator that describes below is included in a combustion chamber and an igniting element in the inner cylindrical element.

The gas generator that is used for air bag of the present invention is a kind of like this gas generator, and wherein two combustion chambers are set in the casing, it is characterized in that the structure that is provided with of two combustion chambers.The generation of gas element separated ignition that can utilize different igniting elements to make to be stored in the different combustion chambers and lighting.

That is to say, according to the present invention, a kind of gas generator that is used for air bag is provided, in having the casing of gas discharge outlet, has the igniting element that can start because of collision, by igniting element igniting with light and produce the generation of gas element of the burning gases that make airbag aeration, wherein, two combustion chambers of stored-gas generating device are set in the casing, between combustion chamber, be provided with intercommunicating pore, one in two combustion chambers is provided at upper space one side that is arranged at the inner cylindrical element in the casing, and igniting element is provided at lower space one side of inner cylindrical element, and upper space and lower space are limited by partition.

Furtherly, according to the present invention, a kind of gas generator that is used for air bag is provided, in having the casing of gas discharge outlet, has the igniting element that can start because of collision, by igniting element igniting with light and produce the generation of gas element of the burning gases that make airbag aeration, wherein, in casing, two combustion chambers of stored-gas generating device are provided with one heart, to such an extent as to the footpath at casing is upwards adjacent one another are, between combustion chamber, be provided with intercommunicating pore, the interior side combusion chamber of two combustion chambers is provided at upper space one side that is arranged at the inner cylindrical element in the casing, and igniting element is provided at lower space one side of inner cylindrical element, and upper space and lower space are limited by partition.

Furtherly, according to the present invention, a kind of gas generator that is used for air bag is provided, in having the casing of gas discharge outlet, has the igniting element that can start because of collision, by igniting element igniting with light and produce the generation of gas element of the burning gases that make airbag aeration, form cylindrical box axle center length greater than external diameter, a plurality of gas discharge outlets are arranged on its perisporium, wherein, on the casing, two combustion chambers of stored-gas generating device provide with one heart, to such an extent as in the axial of casing or radially adjacent one another are, between combustion chamber, be provided with intercommunicating pore, the interior side combusion chamber of two combustion chambers is provided at upper space one side that is arranged at the inner cylindrical element in the casing, and igniting element is provided at lower space one side of inner cylindrical element, and upper space and lower space are limited by partition.

As mentioned above, by side combusion chamber and igniting element in the axial upper and lower that limits the space that element forms is provided with, can make the inner structure simplification of gas generator.

Furtherly, as mentioned above, by two combustion chambers are set in casing with one heart, inner structure that can gas generator is simplified, and lights the generation of gas element in the respective combustion chamber separately.

The gas generator that is used for air bag of the present invention comprises the gas generator with said structure, it is characterized in that being provided with the structure of a combustion chamber and each igniter element, and the method for fixing two or more igniting elements.

Like this, according to the present invention, at the above-mentioned gas generator that is used for air bag, a kind of gas generator that is used for air bag is provided, wherein, igniting element comprises two or more firing units that can start because of collision, and each firing unit is provided at one to be caused in the ring, and fixes by covering the firing unit retaining element that causes the ring upper surface.Furtherly, provide a kind of gas generator that is used for air bag, wherein two or more firing units are provided at one to be caused in the ring.

As mentioned above, with firing unit retaining element while attachment point firearm, it is simple that its structure and manufacturing become.

Furtherly, according to the present invention, at the above-mentioned gas generator that is used for air bag, a kind of gas generator that is used for air bag is provided, wherein, one in two combustion chambers is provided at the outside that is arranged at the inner cylindrical element in the casing, and the inner space of inner cylindrical element is separated loop member and is defined as another combustion chamber and igniting element supply room with stripper loop element ingear seal cup element, has stored the igniting element that comprises firing unit in supply room.Furtherly, provide a kind of gas generator that is used for air bag, wherein, the engagement of the ladder notch portion of the inner periphery surface of stripper loop element and inner cylindrical element.Furtherly, provide a kind of gas generator that is used for air bag, wherein, the circumferential edges of seal cup element is bent, and the curve of circumferential edges is installed in the groove on the inside face of inner cylindrical element.

Furtherly, according to the present invention, at the above-mentioned gas generator that is used for air bag, a kind of gas generator that is used for air bag is provided, wherein the firing unit in the igniting element is by covering the firing unit retaining element supporting that causes the ring upper surface, the seal cup element has a firing unit receiving port that extends to the firing unit retaining element, an O-type ring is arranged on by the firing unit retaining element, in the space that firing unit receiving port and firing unit constitute, O-type ring is between firing unit retaining element and firing unit receiving port, between firing unit retaining element and the firing unit, seal between firing unit receiving port and the firing unit.

Furtherly, according to the present invention, at the above-mentioned gas generator that is used for air bag, provide a kind of gas generator that is used for air bag, wherein O-type ring places between the inner wall surface of installation curve of the curve of circumferential edges of seal cup portion and inner cylindrical element.

As mentioned above, owing to use seal cup element, will O-type ring do not place the installation portion of seal cup and inner cylindrical element with ad hoc structure.Therefore, the diameter of gas generator can be littler.In addition, because mode that can vapor seal keeps igniting element, burning in response to the flame assistant of firing unit can realize equably, because the burning of flame assistant, internal pressure raises, therefore expansion is radially pressed to the curve that the seal cup element is installed with the inner wall surface of inner cylindrical element, to such an extent as to further strengthened vapor seal, the burning of flame assistant can be carried out equably.

Furtherly, as mentioned above,, two or more firing units can be separated fully owing to use firing unit retaining element and seal cup element simultaneously with O-type ring.

The gas generator of being carried electric signal by lead is described below.

According to the present invention, a kind of gas generator that is used for air bag is provided, in having the casing of gas discharge outlet, has the igniting element that can start because of collision, by igniting element igniting with light and produce the generation of gas element of the burning gases that make airbag aeration, wherein, in casing, be provided with two combustion chambers of stored-gas generating device, igniting element comprises two or more firing units that can be activated because of electric signal, carry the lead of electric signal to link to each other with each firing unit, lead is pulled out from same direction on same plane.

As igniting element, in gas generator of the present invention, use electronic ignition type igniting element, igniting element is started by the electric signal (actuation signal) from the crash sensor of detecting collision.Electronic ignition type igniting element comprises firing unit, firing unit can also comprise the flame assistant of lighting a fire and lighting because of in response to the startup of firing unit because of only utilizing electric signal as the electronic sensor of the electricity mechanism detecting collision of semiconductor acceleration sensor to start.

Furtherly, in two or more firing units, carry the lead of electric signal preferably to connect through adaptor union, adaptor union is provided with in same plane abreast.

Furtherly, in two or more firing units, carry the lead of electric signal preferably to connect through adaptor union, lead is connected device from pulling out perpendicular to the axial same direction of casing.

Furtherly, two firing units preferably are provided in the initiation ring of axially aligning, so that install.

Furtherly, two of the stored-gas generating device are provided with one heart, to such an extent as to directly upwards adjacent one another are at casing, the intercommunicating pore that can be communicated with each other is set between combustion chamber.

Furtherly, according to the present invention, a kind of gas generator that is used for air bag is provided, in having the casing of gas discharge outlet, has the igniting element that can start because of collision, by igniting element igniting with light and produce the generation of gas element of the burning gases that make airbag aeration, wherein, in casing, be provided with two combustion chambers of stored-gas generating device, the intercommunicating pore that can be communicated with each other is set between combustion chamber, igniting element comprises two or more firing units that can be activated because of electric signal, carry the lead of electric signal to link to each other with each firing unit, lead is arranged on same plane, to such an extent as to connect a firing unit lead line of centers be connected another firing unit the cross one another angle of line of centers be 180 to spend or littler.

The line of centers of lead is meant the line by the center of two leads that connect each firing unit.Two cross one another angles of line of centers are 180 degree or littler, preferred 90 degree or littler, further preferred 50 or 45 degree or littler.

Furtherly, at the above-mentioned gas generator that is used for air bag, a kind of gas generator that is used for air bag is provided, on its cylindrical shape perisporium, have in the casing of a plurality of gas discharge outlets, has the igniting element that can start because of collision, by igniting element igniting with light and produce the generation of gas element of the burning gases that make airbag aeration, the axle core length of casing is greater than its external diameter, wherein, in casing, the combustion chamber of two stored-gas generating devices is provided with one heart, to such an extent as in the axial of casing and/or radially adjacent one another are, be provided with intercommunicating pore between two combustion chambers.

According to the present invention, the structure of the lead by improve connecting two or more firing units, two or multiple conducting wires can be pulled out from same direction on same plane, therefore, can make the assembling process of airbag apparatus of using gases producer simple and easy, can also make the designs simplification of device.

Gas generator with auto ignition material is described below.

Gas generator of the present invention has two combustion chambers corresponding to such gas generator in casing, after gas generator is activated, and can the remaining generation of gas element of smokeless combustion.Therefore, in the disposal of airbag apparatus from now on, process such as discarded, there is not inconvenient part.

That is to say, according to the present invention, a kind of gas generator that is used for air bag is provided, in having the casing of a plurality of gas discharge outlets, has the igniting element that can start because of collision, by igniting element igniting with light and produce the generation of gas element of the burning gases that make airbag aeration, wherein, in casing, define the combustion chamber of two stored-gas generating devices, between two combustion chambers, be provided with intercommunicating pore, stored auto ignition material (AIM) in a combustion chamber therein, can automatically be lighted a fire and light because of the heat of conduction.For example, if the generation of gas element that is stored in a plurality of combustion chambers was lighted in each combustion chamber in the different time, auto ignition material (AIM) preferably is stored in the generation of gas element with in the combustion chamber that postpones to light.In this case, the conduction of auto ignition material (AIM) heat that can produce owing to the burning of the gas generant of lighting is earlier lighted a fire and is lighted.Preferably the-generation of gas element that need light earlier-igniting element be activated back 100 milliseconds or longer after, auto ignition material makes the gas generant igniting.Furtherly, auto ignition material can be provided with like this: with firing unit combination collocation in the igniting element with igniting with light (or start gas generator after remaining) the generation of gas element that needs to postpone to light.

Can obtain such gas generator: in each combustion chamber at different time points combustion gas body generating device, for example, by the structure igniting element, make it to comprise by firing unit and started and the flame assistant of being lighted a fire and lighting, the flame assistant that distributes each firing unit to be being lighted a fire separately in each firing unit and to be lighted, with the flame assistant in difference is distinguished the combustion flame igniting and light the generation of gas element that is stored in a plurality of combustion chambers.

For example, be provided with in the casing in the gas generator of combustion chamber of two stored-gas generating devices, the first generation of gas element that need at first light is arranged in the different combustion chambers with the second generation of gas element that needs to postpone to light, first igniting element that makes the igniting of the first generation of gas element and second igniting element that makes the igniting of the second generation of gas element are set again, and auto ignition material (AIM) is arranged in the firing unit or second igniting element that is contained in second combustion chamber.As auto ignition material (AIM), the material that the heat along the casing conduction that uses energy to produce owing to the burning of the first generation of gas element is lighted a fire and lighted.

In casing, under the situation of the combustion chamber of two stored-gas generating devices of formation,, further between the combustion chamber in casing intercommunicating pore is set to such an extent as to two combustion chambers can provide upwards adjacent one another are in the footpath of casing with one heart.

Can be used for auto ignition material of the present invention (AIM) and can adopt such material, it at least can be owing to lighting a fire through the heat of combustion (i.e. conduction heat) of (burning at first) generation of gas elements of conduction such as casing and lighting.For example, cellulose nitrate.

Yet, certainly according to the kind of used generation of gas element, transmit heat of combustion transport element (as casing), change with respect to storing the distance that need at first light the position of generation of gas element.Therefore, need suitably select and adopt according to design.

Specifically,

The 1st of the present invention, a kind of gas generator that is used for air bag is provided, in having the casing of gas discharge outlet, have: the igniting element that can excite because of collision, and can be by igniting element igniting and light and produce the generation of gas element of the burning gases that are used to make airbag aeration, wherein, in casing, the combustion chamber of two stored-gas generating devices provides with one heart, to such an extent as to the footpath at casing is upwards adjacent one another are, between combustion chamber, provide the intercommunicating pore that can be communicated with.

2. the 1st of the present invention's the gas generator that is used for air bag wherein further is provided for cooling off the cooling element of the burning gases that produced by the burning of generation of gas element at the radial outside of combustion chamber in the perisporium side of casing.

3. gas generator that is used for air bag, in having the casing of a plurality of gas discharge outlets, its perisporium has: the igniting element that can excite because of collision, and can be by igniting element igniting and light and produce the generation of gas element of the burning gases that are used to make airbag aeration, cylindrical and the axle core length of casing is greater than its external diameter, wherein, be provided with in the axial of casing and/or radially adjacent one another are with one heart to such an extent as to be used for two combustion chambers of stored-gas generating device, the intercommunicating pore that can be communicated with is provided between combustion chamber.

4. the 1st of the present invention's the gas generator that is used for air bag wherein in casing, further defines on the same axle of two combustion chambers and stores the cooling system conditioner supply room that is used for purifying and cooling combusting gas.

5. the gas generator that is used for air bag of any one in the present invention 1-4 item, wherein, igniting element comprises two or more firing units that can excite because of collision, corresponding firing unit is provided at a firing unit to be caused on the ring, to such an extent as to alignment mutually in the axial direction.

6. the 5th of the present invention's the gas generator that is used for air bag, wherein, igniting element comprises the transmission explosive that can be stimulated and light a fire and light because of firing unit, the transmission explosive that is used for each firing unit is spaced, and by each firing unit separated ignition with light.

7. the 6th of the present invention's the gas generator that is used for air bag wherein, is stored in the torch ignition that two generation of gas elements in the combustion chamber produce by the burning of the transmission explosive of appropriate section respectively and lights.

8. the gas generator that is used for air bag of any one in the present invention 1-7 item, wherein, a combustion chamber in two combustion chambers be provided at igniting element axially, another burning is provided at igniting element radially.

9. the gas generator that is used for air bag of any one among the 1st of the present invention, wherein, be stored in have at least in burning velecity, composition, proportion of composing and the amount of two generation of gas elements in the combustion chamber one different.

10. the gas generator that is used for air bag of any one among the 1st of the present invention, wherein, be stored in the different streams of burning gases in each combustion chamber that two generation of gas elements burnings in the combustion chamber produce and reach gas discharge outlet, be stored in a generation of gas element in the combustion chamber not because of the burning gases that produce in another combustion chamber by direct-fire.

11. the gas generator that is used for air bag that the present invention is the 10th wherein, forms element formation stream to such an extent as to stream is set in the casing, therefore, the burning gases as-is condition that produces in the combustion chamber is directed to cooling element.

12. the gas generator that is used for air bag of any one in the present invention 1-11 item, wherein, igniting element comprises two or more firing units that can excite because of collision, and firing unit is by covering the firing unit retaining element supporting that causes the ring upper surface, and is fixed on one and causes on the ring.

13. the gas generator that is used for air bag of any one in the present invention 1-12 item, wherein, firing unit is provided at one to be caused on the ring, alignment mutually in the axial direction, and each firing unit is with respect to the eccentricity of central axis setting of casing.

14. the gas generator that is used for air bag of any one in the present invention 1-13 item, wherein, igniting element comprises two or more firing units that can excite because of collision, and different firing units has different output.

15. the gas generator that is used for air bag of any one in the present invention 1-14 item, wherein, igniting element comprises two or more firing units that can excite because of electric signal, and the lead of transmission of electric signals is connected respectively on the firing unit, and lead is pulled out from same direction on same plane.

16. the gas generator that is used for air bag of any one in the present invention 1-15 item, wherein, igniting element comprises two or more firing units that can excite because of electric signal, and the lead of transmission of electric signals is connected on the firing unit through adaptor union respectively, and adaptor union is provided with at grade abreast.

17. the gas generator that is used for air bag of any one in the present invention 1-16 item, wherein, igniting element comprises two or more firing units that can excite because of electric signal, the lead of transmission of electric signals is connected on the firing unit through adaptor union respectively, and lead is from being pulled out by adaptor union perpendicular to the axial same direction of casing.

18. the gas generator that is used for air bag of any one in the present invention 1-17 item, wherein, igniting element comprises two or more firing units that can excite because of electric signal, the lead of transmission of electric signals is connected on the firing unit through adaptor union respectively, and adaptor union has the setting element that can only connect a firing unit.

19. the gas generator that is used for air bag that the present invention is the 18th, wherein, setting element is shaped to the shape of adaptor union, and this shape is with respect to each bonded assembly firing unit and difference.

20. the present invention the 17th or 18 s' the gas generator that is used for air bag, wherein, setting element is to form groove and/or projection on adaptor union, to such an extent as to respect to each bonded assembly firing unit in the position and/or different in shape.

21. the present invention the 1st or 2 s' the gas generator that is used for air bag, wherein, a combustion chamber in two combustion chambers is provided at the inner cylindrical element outside that is positioned in the casing, and the inner space of inner cylindrical element is defined as another combustion chamber and igniting element supply room by the next door.

22. the gas generator that is used for air bag that the present invention is the 21st, wherein, the next door comprise on the inner cylindrical element inner periphery surface ladder notch portion ingear stripper loop element and with stripper loop element ingear seal cup element, the circumferential edges of seal cup portion is bent, and circumferential edges is installed in the groove on the inner cylindrical element inner periphery surface.

23. the gas generator that is used for air bag that the present invention is the 22nd, wherein, igniting element comprises the firing unit that can excite because of electric signal, firing unit is supported and covers on the firing unit retaining element that causes the ring upper surface, cause on the ring to such an extent as to be fixed to, the seal cup element has the firing unit receiving port that extends to the firing unit retaining element, O-type ring is provided at by the firing unit retaining element, in the space that firing unit receiving port and firing unit form, O-type ring is sealed between firing unit retaining element and the firing unit receiving port, between firing unit retaining element and firing unit, seal between firing unit receiving port and the firing unit.

24. the gas generator that is used for air bag of any one in the present invention 1-23 item, wherein, the cylindrical shape cooling element that is used for the burning gases that purifying and/or cooling produce by generation of gas element burning is placed in the casing, and the burning gases that produce in two combustion chambers are all by same cooling element.

25. the gas generator that is used for air bag of any one in the present invention 1-24 item, wherein, be stored in two generation of gas elements in the combustion chamber and lighted in corresponding combustion chamber in the different time, the conduction of the heat that can produce because of the gas generant burning of lighting is earlier lighted a fire and lighted auto ignition material (AIM) to be arranged in the combustion chamber that has stored the generation of gas element that will postpone to light.

26. an airbag apparatus comprises:

The gas generator that is used for air bag;

The crash sensor that is used for detecting collision and energizing gas producer;

Be introduced in the gas that produces in the gas generator and make it inflatable air bag;

Be used to store the module cover of air bag,

The gas generator that wherein is used for air bag is any one the gas generator that is used for air bag of the present invention 1-25 item.

27. gas generator that is used for air bag, in having the casing of gas discharge outlet, have: the igniting element that can excite because of collision, and can be by igniting element igniting and light and produce the generation of gas element of the burning gases that are used to make airbag aeration, wherein, in casing, limit the combustion chamber of two or more stored-gas generating devices, be stored in generation of gas element in the respective combustion chamber by the igniting element separated ignition in the respective combustion chamber and lighting, be stored in the burning velecity of the generation of gas element in each combustion chamber, shape, form, proportion of composing with the amount in have at least one different.

28. gas generator that is used for air bag, in having the casing of gas discharge outlet, have: the igniting element that can excite because of collision, and can be by igniting element igniting and light and produce the generation of gas element of the burning gases that are used to make airbag aeration, wherein, in casing, to such an extent as to it is adjacent one another are casing is axial that the combustion chamber of two stored-gas generating devices provides with one heart, the intercommunicating pore that can be communicated with is provided between combustion chamber, has been stored in the burning velecity of the generation of gas element in each combustion chamber, shape, form, proportion of composing with the amount in have at least one different.

29. gas generator that is used for air bag, in having the casing of gas discharge outlet, have: the igniting element that can excite because of collision, and can be by igniting element igniting and light and produce the generation of gas element of the burning gases that are used to make airbag aeration, wherein, in casing, limit the combustion chamber of two or more stored-gas generating devices, be stored in generation of gas element in each combustion chamber by the igniting element separated ignition in the respective combustion chamber and lighting, the amount that is stored in the generation of gas element gas that in unit time produces in respective combustion chamber in each combustion chamber differs from one another.

30. gas generator that is used for air bag, have on it and have the igniting element that two or more can excite because of collision in casing of a plurality of gas discharge outlets, can light a fire respectively and light and produce the generation of gas element of the burning gases that make airbag aeration by igniting element, casing has formed outer casing container, wherein, gas discharge outlet is sealed so that box house pressure is maintained predetermined level by packing element, the fracture pressure that packing element is broken can be divided multistage adjusting by control gaseous discharge orifice and/or packing element, thereby when each igniting element is excited, the maximum internal pressure that suppresses casing is poor, each that is limited in the casing two or the many combustion chambers has all stored the generation of gas element, be stored in the burning velecity of the generation of gas element in two combustion chambers, shape, form, have at least in proportion of composing and the amount one different, the time separated ignition that the generation of gas element in the respective combustion chamber can be chosen wantonly and lighting.

31. gas generator that is used for air bag, have on it and have the igniting element that two or more can excite because of collision in casing of a plurality of gas discharge outlets, can light a fire respectively and light and produce the generation of gas element of the burning gases that make airbag aeration by igniting element, casing has formed outer casing container, wherein, gas discharge outlet is sealed so that box house pressure is maintained predetermined level by packing element, the fracture pressure that packing element is broken can be divided multistage adjusting by control gaseous discharge orifice and/or packing element, thereby when each igniting element is excited, the maximum internal pressure that suppresses casing is poor, is loaded in the burning velecity of the generation of gas element in the respective combustion chamber, shape, form, proportion of composing with the amount in have at least one different.

32. the gas generator that is used for air bag of any one in the present invention 27-31 item, wherein, the shape difference of the generation of gas element in each combustion chamber is meant the thickness or the face area difference of gas generant, and the amount difference of generation of gas element refers to vary in weight in the respective combustion chamber.

33. the gas generator that is used for air bag of any one in the present invention 27-32 item, wherein, loaded the generation of gas element that burning velecity differs from one another in a plurality of combustion chambers, burning velecity (Vs) with respect to the generation of gas element that stores the medium and small burning velecity of any combustion chamber, be stored in the burning velecity (Vl) of the generation of gas element of the large-scale combustion speed in another combustion chamber, ratio (Vl/Vs) greater than 1 in less than 14 scope.

34. the gas generator that is used for air bag of any one in the present invention 27-33 item, wherein, loaded the generation of gas element that shape differs from one another in a plurality of combustion chambers, be stored in a generation of gas element in the combustion chamber at thickness and/or the face area difference generation of gas element in being stored in another combustion chamber not.

35. the gas generator that is used for air bag of any one in the present invention 27-34 item, wherein, loaded the generation of gas element that thickness differs from one another in a plurality of combustion chambers, with respect to little thickness (Ts) the generation of gas element that is stored in the combustion chamber, ((Tl) generation of gas element, ratio (Tl/Ts) is adjusted between 1 to 100 to be stored in heavy gauge in another combustion chamber.

36. the gas generator that is used for air bag of any one in the present invention 27-35 item, wherein, loaded the generation of gas element that the face area of unit weight differs from one another in a plurality of combustion chambers, with respect to little face area (Ss) the generation of gas element that is stored in the combustion chamber, be stored in high surface area (Sl) the generation of gas element in another combustion chamber, ratio (Sl/Ss) is adjusted to greater than 1 to less than in 50 the scope.

37. the gas generator that is used for air bag of any one in the present invention 27-36 item, wherein, gas generator axially be shorter than it radially, loaded the generation of gas element that shape and/or amount differ from one another in a plurality of combustion chambers, the total surface area (TS1) that is stored in a generation of gas element in the combustion chamber and the ratio that is stored in the total surface area (TS2) of the gaseousness element in another combustion chamber (TS1: TS2) be adjusted in 1: 50 to 50: 1 the scope.

38. the gas generator that is used for air bag of any one in the present invention 27-37 item, wherein, gas generator axially be shorter than it radially, loaded the generation of gas element that shape and/or amount differ from one another in a plurality of combustion chambers, the total surface area (TS1) that is stored in a generation of gas element in the combustion chamber and the ratio that is stored in the total surface area (TS2) of the gaseousness element in another combustion chamber (TS1: TS2) be adjusted in 1: 300 to 300: 1 the scope.

39. the gas generator that is used for air bag of any one in the present invention 27-38 item, wherein, gas generator axially be shorter than it radially, loaded the generation of gas element that weight differs from one another in a plurality of combustion chambers, the total weight (TW1) that is stored in a generation of gas element in the combustion chamber and the ratio that is stored in the total weight (TW2) of the generation of gas element in another combustion chamber (TW1: TW2) be adjusted in 1: 50 to 50: 1 the scope.

40. the gas generator that is used for air bag of any one in the present invention 27-39 item, wherein, gas generator axially be shorter than it radially, loaded the generation of gas element that weight differs from one another in a plurality of combustion chambers, the total weight (TW1) that is stored in a generation of gas element in the combustion chamber and the ratio that is stored in the total weight (TW2) of the generation of gas element in another combustion chamber (TW1: TW2) be adjusted in 1: 300 to 300: 1 the scope.

41. an airbag apparatus comprises:

The gas generator that is used for air bag;

Be used to store the module cover of air bag,

The gas generator that wherein is used for air bag be the present invention 27-40 item any one in the gas generator of air bag.

42. gas generator that is used for air bag, in having the casing of gas discharge outlet, have: the igniting element that can excite because of collision, and can be by igniting element igniting and light and produce the generation of gas element of the burning gases that are used to make airbag aeration, wherein, igniting element comprises two or more firing units that can excite because of collision, and firing unit is alignment mutually in the axial direction.

43. the gas generator that is used for air bag that the present invention is the 42nd, wherein, the two or more firing units in the igniting element are installed in one to be caused in the ring, to such an extent as to alignment mutually in the axial direction.

44. the gas generator that is used for air bag that the present invention is the 42nd, wherein, the two or more firing units in the igniting element form an integral body by resin, to such an extent as to alignment mutually in the axial direction.

45. the gas generator that is used for air bag that the present invention is the 42nd, wherein, the two or more firing units in the igniting element are caused in the ring at one by resin and form an integral body, to such an extent as to alignment mutually in the axial direction.

46. gas generator that is used for air bag, in having the casing of gas discharge outlet, have: the igniting element that can excite because of collision, and can be by igniting element igniting and light and produce the generation of gas element of the burning gases that are used to make airbag aeration, wherein, igniting element comprises two or more firing units that can excite because of collision, and firing unit forms an integral body by resin.

47. gas generator that is used for air bag, in having the casing of gas discharge outlet, have: the igniting element that can excite because of collision, and can be by igniting element igniting and light and produce the generation of gas element of the burning gases that are used to make airbag aeration, wherein, igniting element comprises two or more firing units that can excite because of collision, and firing unit is installed in one to be caused in the ring.

48. the gas generator that is used for air bag that the present invention is the 47th, wherein, the two or more firing units in the igniting element are caused in the ring at one by resin and form an integral body.

49. the gas generator that is used for air bag of any one in the present invention 42-48 item, have two or more igniting elements, thereby and by corresponding igniting element separated ignition with light the two or more generation of gas elements that produce the burning gases make airbag aeration.

50. the gas generator that is used for air bag of any one in the present invention 42-49 item, wherein, to such an extent as to provide firing unit to be in alignment with each other in the axial direction on an initiation ring, each firing unit is with respect to the eccentricity of central axis setting of casing.

51. the gas generator that is used for air bag of any one in the present invention 42-50 item, wherein, igniting element comprises two or more firing units that can excite because of collision, and the operation output of corresponding firing unit differs from one another.

52. an airbag apparatus comprises:

The gas generator that is used for air bag;

Be used to store the module cover of air bag,

The gas generator that wherein is used for air bag be the present invention 42-51 item any one in the gas generator of air bag.

53. gas generator that is used for air bag, in having the casing of gas discharge outlet, have: the igniting element that can excite because of collision, and can be by igniting element igniting and light and produce the generation of gas element of the burning gases that are used to make airbag aeration, wherein, in casing, the combustion chamber of two or more stored-gas generating devices is provided, the intercommunicating pore that can be communicated with is provided between combustion chamber, one in two combustion chambers is provided at upper space one side that is arranged at the inner cylindrical element in the casing, igniting element is provided at lower space one side of inner cylindrical element, and upper space and lower space are limited by partition.

54. gas generator that is used for air bag, in having the casing of gas discharge outlet, have: the igniting element that can excite because of collision, and can be by igniting element igniting and light and produce the generation of gas element of the burning gases that are used to make airbag aeration, wherein, in casing, to such an extent as to it is directly upwards adjacent at casing that the combustion chamber of two or more stored-gas generating devices provides with one heart, the intercommunicating pore that can be communicated with is provided between combustion chamber, the inner combustion chamber of two combustion chambers is provided at upper space one side that is arranged at the inner cylindrical element in the casing, igniting element is provided at lower space one side of inner cylindrical element, and upper space and lower space are limited by partition.

55. gas generator that is used for air bag, in having the casing of a plurality of gas discharge outlets, its perisporium has: the igniting element that can excite because of collision, and can be by igniting element igniting and light and produce the generation of gas element of the burning gases that are used to make airbag aeration, cylindrical and the axle core length of casing is greater than its external diameter, wherein, in casing, to such an extent as to being used for two combustion chambers of stored-gas generating device is provided with one heart in the axial of casing and/or radially adjacent one another are, the intercommunicating pore that can be communicated with is provided between combustion chamber, the inner combustion chamber of two combustion chambers is provided at upper space one side that is arranged at the inner cylindrical element in the casing, igniting element is provided at lower space one side of inner cylindrical element, and upper space and lower space are limited by partition.

56. the gas generator that is used for air bag of any one in the present invention 53-55 item, wherein, igniting element comprises two or more firing units that can excite because of collision, and each firing unit is fixed on and causes on the ring, and is fixed by covering the firing unit retaining element that causes the ring upper surface.

57. the gas generator that is used for air bag that the present invention is the 56th, wherein, two or more firing units are provided at one to be caused on the ring.

58. the gas generator that is used for air bag of any one in the present invention 53-57 item, wherein, a combustion chamber in two combustion chambers is provided at the inner cylindrical element outside that is positioned in the casing, the inner space of inner cylindrical element is separated loop member and is divided into another combustion chamber and igniting element supply room with stripper loop element ingear seal cup element, has stored the igniting element that comprises firing unit in supply room.

59. the gas generator that is used for air bag that the present invention is the 6th, wherein, the ladder notch portion engagement on stripper loop element and the inner cylindrical element inner periphery surface.

60. the gas generator that is used for air bag of any one in the present invention 58-59 item, wherein, the circumferential edges of seal cup portion is bent, and the curve of circumferential edges is installed in the groove on the inner cylindrical element inner periphery surface.

61. the gas generator that is used for air bag of any one in the present invention 53-60 item, wherein, firing unit in the igniting element is supported to cover on the firing unit retaining element that causes the ring upper surface and be fixed to and causes on the ring, the seal cup element has a firing unit receiving port that extends to the firing unit retaining element, an O-type ring is arranged on by the firing unit retaining element, in the space that firing unit receiving port and firing unit constitute, O-type ring is between firing unit retaining element and firing unit receiving port, between firing unit retaining element and the firing unit, seal between firing unit receiving port and the firing unit.

62. the gas generator that is used for air bag of any one in the present invention 53-61 item, wherein, O-type ring places between curve and inner cylindrical element and the inner wall surface that curve cooperates of circumferential edges of seal cup portion.

63. an airbag apparatus comprises:

The gas generator that is used for air bag;

Be used to store the module cover of air bag,

The gas generator that wherein is used for air bag be the present invention 53-62 item any one in the gas generator of air bag.

64. gas generator that is used for air bag, in having the casing of gas discharge outlet, have: the igniting element that can excite because of collision, and can be by igniting element igniting and light and produce the generation of gas element of the burning gases that are used to make airbag aeration, wherein, in casing, two combustion chambers that are used for the stored-gas generating device are provided, the intercommunicating pore that can be communicated with is provided between combustion chamber, igniting element comprises two or more firing units that can excite because of electric signal, the lead of transmission of electric signals is connected respectively on the firing unit, and lead is pulled out from same direction on same plane.

65. the gas generator that is used for air bag that the present invention is the 64th, wherein, igniting element comprises two or more firing units that can excite because of electric signal, and the lead of transmission of electric signals is connected on the firing unit through adaptor union respectively, and adaptor union is provided with at grade abreast.

66. the present invention the 64th or 65 s' the gas generator that is used for air bag, wherein, igniting element comprises two or more firing units that can excite because of electric signal, on adaptor union was connected to separately firing unit, lead was from being pulled out by adaptor union perpendicular to the axial same direction of casing respectively for the lead of transmission of electric signals.

67. the gas generator that is used for air bag of any one in the present invention 64-66 item, wherein, firing unit is provided at one to be caused on the ring, alignment mutually in the axial direction, and each firing unit is with respect to the eccentricity of central axis setting of casing.

68. the gas generator that is used for air bag of any one in the present invention 64-67 item, wherein, the combustion chamber of two stored-gas generating devices provides with one heart, to such an extent as to upwards adjacent one another are in the footpath of casing, the intercommunicating pore that can be communicated with is provided between combustion chamber.

69. gas generator that is used for air bag, in having the casing of gas discharge outlet, have: the igniting element that can excite because of collision, and can be by igniting element igniting and light and produce the generation of gas element of the burning gases that are used to make airbag aeration, wherein, in casing, two combustion chambers that are used for the stored-gas generating device are provided, the intercommunicating pore that can be communicated with is provided between combustion chamber, igniting element comprises two or more firing units that can excite because of electric signal, the lead of transmission of electric signals is connected respectively to separately on the firing unit, lead is arranged on same plane, to such an extent as to connect a firing unit lead line of centers be connected another firing unit the cross one another angle of line of centers be 180 the degree or littler.

70. the gas generator that is used for air bag of any one in the present invention 64-69 item, in having the casing of a plurality of gas discharge outlets, its perisporium has: the igniting element that can excite because of collision, and can be by igniting element igniting and light and produce the generation of gas element of the burning gases that are used to make airbag aeration, cylindrical and the axle core length of casing is greater than its external diameter, wherein, in casing, be provided with in the axial of casing and/or radially adjacent one another are with one heart to such an extent as to be used for two combustion chambers of stored-gas generating device, the intercommunicating pore that can be communicated with is provided between combustion chamber.

71. gas generator that is used for air bag, in having the casing of gas discharge outlet, have: the igniting element that can excite because of collision, and can be by igniting element igniting and light and produce the generation of gas element of the burning gases that are used to make airbag aeration, wherein, in casing, be separated into and provide two or more combustion chambers that are used for the stored-gas generating device, the intercommunicating pore that can be communicated with is provided between combustion chamber, in a combustion chamber, is provided with and is lighted a fire and light auto ignition material (AIM) because of the heat conduction.

72. the gas generator that is used for air bag that the present invention is the 71st, wherein, the generation of gas element that is stored in a plurality of combustion chambers was lighted in corresponding combustion chamber in the different time, and the conduction of the heat that can produce because of the gas generant burning of lighting is earlier lighted a fire and lighted auto ignition material (AIM) to be arranged in the combustion chamber that has stored the generation of gas element that will postpone to light.

73. the gas generator that is used for air bag that the present invention is the 72nd, wherein, auto ignition material the igniting element of the generation of gas element that need light earlier be excited back 100 milliseconds or longer after, make the gas generant igniting.

74. the present invention the 72nd or 73 s' the gas generator that is used for air bag wherein, is provided with auto ignition material and combines with igniting and light with firing unit in the igniting element and need the generation of gas of lated sparking element.

75. the gas generator that is used for air bag of any one in the present invention 71-74 item, wherein, the gas generator of the combustion chamber of two stored-gas generating devices is provided in the casing, the generation of gas element that need at first light is arranged in the different combustion chambers with the generation of gas element that need to postpone to light, with as the first generation of gas element and the second generation of gas element.

76. the gas generator that is used for air bag of any one among the 1st 71-75 of the present invention, wherein, in casing, the combustion chamber of two stored-gas generating devices provides with one heart, to such an extent as to the footpath at casing is upwards adjacent one another are, between combustion chamber, provide the intercommunicating pore that can be communicated with.

77. the gas generator that is used for air bag of any one in the present invention 71-76 item, wherein, igniting element comprises and can be excited the transmission explosive of lighting a fire and lighting because of firing unit, the transmission explosive that is used for each firing unit is spaced, and, be stored in the torch ignition that the generation of gas element in a plurality of combustion chambers produces by the burning of the transmission explosive of appropriate section respectively and light by each firing unit separated ignition and lighting.

78. an airbag apparatus comprises:

The gas generator that is used for air bag;

Be used to store the module cover of air bag,

The gas generator that wherein is used for air bag be the present invention 71-77 item any one in the gas generator of air bag.

The accompanying drawing summary

Fig. 1 is the sectional side elevation of an embodiment of gas generator of the present invention;

Fig. 2 is the back view of gas generator of the present invention;

Fig. 3 is the partial enlarged drawing of gas generator of the present invention;

Fig. 4 is the sectional side elevation of another embodiment of the present invention's gas generator of being used for air bag;

Fig. 5 is the operation output curve diagram of the present invention's gas generator of being used for air bag;

Fig. 6 is the sectional side elevation of another embodiment of the present invention's gas generator of being used for air bag;

Fig. 7 is the sectional side elevation of another embodiment of the present invention's gas generator of being used for air bag;

Fig. 8 is the sectional side elevation of another embodiment of the present invention's gas generator of being used for air bag;

Fig. 9 is the sectional side elevation of another embodiment of the present invention's gas generator of being used for air bag;

Figure 10 is the transparent view that shows the open mode of partition (partition wall) main portion;

Figure 11 (a)-(d) is the transparent view that shows the open mode of setting element (positioning means) main portion;

Figure 12 is the sectional side elevation of another embodiment of the present invention's gas generator of being used for air bag;

Figure 13 is the sectional side elevation of another embodiment of the present invention's gas generator of being used for air bag;

Figure 14 is the scheme drawing of airbag apparatus of the present invention;

Figure 15 is the sectional side elevation of another embodiment of gas generator of the present invention;

Figure 16 is the sectional side elevation of another embodiment of gas generator of the present invention;

Figure 17 is the sectional side elevation of another embodiment of the present invention's gas generator of being used for air bag;

Figure 18 is the sectional side elevation of another embodiment of the present invention's gas generator of being used for air bag;

Figure 19 is the sectional side elevation of another embodiment of gas generator of the present invention;

Figure 20 (a)-(c) is the cutaway view of the main portion of breaking part (opening portion);

Figure 21 is the sectional side elevation that is provided with the embodiment of (arranged) auto ignition material (automatic ignition material);

Figure 22 is a scheme drawing of measuring the method for perforated cylinder shape gas generant thickness;

Figure 23 is the sectional side elevation of another embodiment of gas generator of the present invention;

Figure 24 is used for the method that explanation is installed to firing unit initiation ring shown in Figure 23 (initiator collar);

Figure 25 is used for the method that explanation is installed to firing unit initiation ring shown in Figure 23 (initiator collar);

Figure 26 is the sectional side elevation of another embodiment of the present invention's gas generator of being used for air bag.

Reference number in the accompanying drawing is described below.

3 casings

5a first combustion chamber

5b second combustion chamber

7 partitions

9a first gas generant

9b second gas generant

12a first firing unit

The 12b secondary igniter

13 cause ring

22 cooling vessels/filter

40 resins (resin)

105a first combustion chamber

105b second combustion chamber

107 partitions

113 cause ring

122 cooling vessels/filter

305a first combustion chamber

305b second combustion chamber

307 partitions

The 309a gas generant

The 309b gas generant

312a first firing unit

The 312b secondary igniter

313 cause ring

350 separate ring (sectioning circular member)

360 cup seals

361 cup seals

308 igniting element supply rooms

382 firing unit connecting elements

50a, the 50b lead

51a, the 51b attaching parts

385 auto ignition materials (AIM)

The embodiment of the invention is described in detail

Below in conjunction with the embodiment in the accompanying drawing gas generator that the present invention is used for air bag is described.

Fig. 1 is the sectional side elevation of first embodiment of the present invention's gas generator of being used for air bag, has described a kind of structure that is particularly suitable for being arranged on driver side.

Gas generator comprises casing 3, casing 3 is connected to form by diffusion shell (diffusershell) 1 that has gas discharge outlet and capsul (closure shell) 2, capsul 2 has formed inner accepting space with diffusion shell 1, gas generator also comprises the cylindrical circular basically inner cylindrical element 4 that is arranged in the casing 3, therefore, the outside by inner cylindrical element 4 has formed first combustion chamber.In addition, be provided with ladder recess (stepped notch) portion 6 in the inner cylindrical element inboard, basically rounded tabular partition 7 is arranged on the ladder notch portion, partition further is divided into two chambers with the inside of inner cylinder, forms the second combustion chamber 5b of diffusion side (upside) and the igniting element supply room 8 of sealing shell-side (downside) respectively.Consequently, in this gas generator, in casing 3, provide the first combustion chamber 5a and the second combustion chamber 5b with one heart, and be provided with at the casing radially adjoining.The igniting element that essential factor is impacted and start is lighted (burn) and produces the gas generant of burning gases that (9a 9b) is stored in first and second combustion chambers, essential factor is impacted and the igniting element that starts (actuated) is stored in the igniting element supply room 8.Provide a through hole 10 on the inner cylindrical element 4 that limits the first combustion chamber 5a and the second combustion chamber 5b, through hole is by sealing band 11 sealings.When gas generant was lighted, sealing band 11 broke, and two combustion chambers are communicated with by through hole 10.Can adjust the material and the thickness of sealing band, make that the gas generant 9a when burning sealing band in the first combustion chamber 5a does not break, and when the gas generant 9b among the second combustion chamber 5b is lighted, break.In the present embodiment, used thickness is the stainless steel strip of 40 μ m.In addition, because perforated area is greater than gas discharge outlet 26b, through hole 10 does not play control combustion chamber 5b internal pressure.

Igniting element comprises two electronic ignition type firing unit 12a and 12b, and firing unit is because sensor is activated because of the actuation signal of surveying output, and firing unit is parallel to each other on an initiation ring 13, thereby exposes head.As mentioned above, two firing units are fixed on and cause on the ring 13, thereby provide two firing unit 12a and 12b to form single element by causing on the ring 13 at one.Specifically, in gas generator shown in this figure, because causing the size of ring 13 can insert in the inner cylindrical element 4, by making inner cylindrical element 4 lower ends curl (crimpig), firing unit can be fixed easily and reliably, thereby inserts the fixing ring that causes in inner cylinder 4 backs at the initiation ring 13 with two firing unit 12a and 12b.In addition, (12a, in the time of 12b), the direction of each firing unit is easy to control when two firing units are set in initiation ring 13.As shown in the figure, two firing units depart from the center shaft setting of casing.Under the situation that the direction of firing unit 12a and 12b is alignd, shown in the back view of the gas generator of present embodiment, point of connection firearm (12a and 12b) can be pulled out from conplane same direction with the lead 50 of control element (not shown) as shown in Figure 2.In Fig. 2, lead 50 is connected to each firing unit through adaptor union 50a, and (12a, 12b), adaptor union is parallel to each other in same plane.Because it is L shaped that adaptor union forms, perpendicular to casing axially (be casing radially) transmit the lead of electric signal (actuation signal) to firing unit, at this moment, the lead that connects each firing unit is pulled out from same direction.

In this embodiment, basically cylindrical circular separation cylinder (separating cylinder) 14 is arranged in the space of causing between ring 13 and the partition 7, therefore, surround a firing unit 12b (calling " secondary igniter " in the following text), define the first flame assistant supply room 15a in its outside respectively, side defines the second flame assistant supply room 15b within it, firing unit and be stored in each supply room with the flame assistant that firing unit constitutes igniting element.Therefore, with firing unit constitute igniting element the flame assistant (16a, 16b) separated into reliably two firing units (12a, 12b).When the flame assistant 16a among the first flame assistant supply room 15a was lighted, the sealing band that is used for the flame transfer hole 17 on the closed cylinder element 4 broke, and therefore, the first flame assistant supply room 15a is communicated with the first combustion chamber 5a.When the flame assistant 16b among the second flame assistant supply room 15b was lighted, the sealing band that is used to seal the flame transfer hole 19 on the partition 7 broke, and therefore, the second flame assistant supply room 15b is communicated with the second combustion chamber 5b.Therefore, in this gas generator, when the first firing unit 12a is lighted the flame that (startup) produces, igniting or light flame assistant 16a among the first supply room 15a, then, flame is by the flame transfer hole 17 on the inner cylindrical element 4, lights a fire and lights the gas generant 9a that 7 holes are arranged that is stored among the first combustion chamber 5a, and the footpath that the first combustion chamber 5a is positioned at chamber 15a upwards.In addition, secondary igniter 12b lights a fire and lights the second flame assistant 16b that is stored among the supply room 15b, flame is by the axial flame transfer hole 19 of supply room 15b, the igniting and light the single hole gas generant 9b that is stored among the second combustion chamber 5b, the second combustion chamber 5b is positioned on its extending direction.The burning gases that produce among the second combustion chamber 9b flow into the first combustion chamber 5a by (the diffusion shell-side 1) through hole 10 on the inner cylindrical element 4.

Specifically, in gas generator shown in Figure 1, in order to stablize startability, it is that the secondary igniter 12b and the first firing unit 12a light a fire simultaneously that a kind of situation is arranged, and still, the former 12b can not be activated before latter 12a.That is to say that the gas generant 9b that is stored among the second combustion chamber 5b lights simultaneously or lights with the gas generant 9a that is stored among the first combustion chamber 5a after delay a period of time.When the gas generant 9a among the first combustion chamber 5a was lighted before the second gas generant 9b, as previously described, sealing band 11 can not break because of the burning of the first gas generant 9a, only can break because of the burning of the second gas generant 9b.Furtherly, in this gas generator shown in the drawings, so be arranged on to cause and separate cylinder 14 between ring and the partition, as shown in the enlarged drawing of main portion among Fig. 3, to such an extent as to provide one corresponding to the hole portion 21 that separates cylinder 14 profiles at the lower surface of partition 7 and the upper surface of initiator 13, the top and bottom of separating cylinder 14 are fixed on corresponding hole portion.Separate cylinder 14 by being provided with by this way, the flame that flame assistant in one of them flame assistant supply room produces can directly not lighted the flame assistant in another flame assistant supply room, is stored in the burning of the flame assistant that two gas generants in the combustion chamber are distinguished by difference and is lighted a fire and light.Usually, when the flame assistant in separating cylinder 14 (the second flame assistant supply room just) is lighted, the gaseous tension that burning produces makes and separates cylinder in radial expansion, but, by mode shown in Figure 3 the separation cylinder is set, the upper and lower end that separates cylinder is supported on the perisporium of hole portion securely, corresponding site is chimeric, like this, place (interposing) partition and cause between the ring and compare with separating cylinder simply, can prevent burning gases and the leakage that transmits flame effectively.

In addition, in casing 3, be provided with common cooler/filter 22, with purifying and the cooling by gas generant (9a, 9b) the burning gases of Chan Shenging, the inner periphery surface of diffusion shell 1 side is covered by anti-short-circuit component 23, therefore, burning gases can not pass through between the top inner surface 28 of the end face of cooling vessel/filter 22 and diffusion shell 1.At the arranged outside skin 24 of cooling vessel/filter 22, to prevent the outside expansion of passing through generation of filter 22 owing to burning gases or analogue.For example, outer 24 can be formed by the wire gauze body of stratification, also can form, perhaps by making ribbon element be configured as band shape inhibition (suppressing) the layer formation that annular is obtained with preset width by the perforated cylinder shape element that many through holes are arranged on all wall surfaces.The outside outer 24 further forms gap 25, makes the whole surface that burning gases can filter 22 pass through.Discharge orifice 26 on the diffusion shell is sealed to stop entering of outer gas by sealing band 27.Sealing band 27 breaks when discharging gas.The purpose of sealing band 27 is that gas generant and outside moisture are isolated, but to as the control of performances such as combustion pressure without any influence.

In the gas generator that constitutes in the above described manner, in being arranged on igniting element supply room 8 and when the first firing unit 12a that separates cylinder 14 outsides is activated, being stored in flame assistant 16a among the first flame assistant supply room 15a is lighted a fire and is lighted, therefore, flame passes through the flame transfer hole 17 on the inner cylindrical element 4, and lights the first gas generant 9a of the cylindrical shape seven apertures in the human head that is stored among the first combustion chamber 5a.The secondary igniter 12b that centers on when separated cylinder 14 is started simultaneously, or be activated when being activated after the back postpones a period of time at the first firing unit 12a, being stored in flame assistant 16b among the second flame assistant supply room 15b is lighted a fire and is lighted, therefore, torch ignition and the first gas generant 9b that lights the cylindrical shape single hole that is stored among the first combustion chamber 5b.Therefore, the point of ignition of two some device 12a and 12b is adjusted.That is to say that the output form of gas generator (startability) can randomly be regulated by restarting secondary igniter after being activated at first firing unit or starting first and second firing units simultaneously.Therefore, in all cases, under the situations such as speed when bumping (impact) and ambient temperature, the air bag in the airbag apparatus cited below is most suitably inflated as the vehicle.Specifically, in gas generator shown in this figure, combustion chamber (5a, 5b) gas generant (the 9a of Cai Yonging, 9b) have configurations differing from one, first gas generant 9a of perforated cylinder shape and columnar second gas generant of single hole be stored in respectively the first combustion chamber 5a and and the second combustion chamber 5b in.Furtherly, ((9a 9b) is respectively 35 grams and 6 and restrains to be stored in gas generant among the first combustion chamber 5a and the second combustion chamber 5b for 5a, 5b) the amount difference of the gas generant in to be stored in each combustion chamber.Therefore, in this gas generator, can regulate output form more accurately.Certainly, also can change the shape, composition, composition ratio, amount etc. of gas generant to obtain required output form.

The startability of aforesaid gas generator also can be confirmed by the gas cylinder combustion experiment of describing below.

＜gas cylinder (tank) combustion experiment 〉

It is 60 liters SUS (corrosion-resistant steel) gas cylinder that the gas generator that is used for air bag is installed in volume, at room temperature with behind the gas cylinder good seal, is connected on the external electrical firing circuit.By setting-up time, when electronic igniting circuit switch open (use electronic igniting circuit) to 0 the time, the variation that the gas cylinder internal pressure rises is measured in the 0-200 millisecond by the pressure sensor that is placed on separately in the gas cylinder.The data that at every turn record are converted into storage pressure/time curve with computing machine at last, obtain the curve (calling " gas cylinder curve " in the following text) of the performance of estimation generation of gas formed body.After burning is finished,, carry out gas analysis to measure CO, NO to discharging the gas sample in the gas cylinder _XDeng.

Embodiment 2

Fig. 4 is the sectional side elevation of another embodiment of the present invention's gas generator of being used for air bag.Gas generator in the figure is the same with gas generator shown in Figure 1, and its structure also is particularly suitable for being arranged on driver side.Yet, gas generator is different from gas generator shown in Figure 1 shown in this figure, in the first combustion chamber 5a, be provided with stream and form element (flow passage forming member) 51, the burning gases that formed generation in stream 52, the second combustion chamber 5b between the surface that forms element 51 at stream and the top 28 of diffusion shell inside face this stream 52 of flowing through.

It is annular that stream forms element 51, be to obtain by the neighboring of circular element and inside circumference bending, therefore formed internal perisporium 53 and periphery wall 54, the abutment wall 56 that forms spaces with the inside face top 28 of spreading shell is integrally formed on the ring portion 55, and ring portion 55 connects two all wall surfaces.Stream forms element 51 and supports (hold) inner cylindrical element 4 and internal perisporium 53, and abutment wall 56 is contacted with the inside face top of diffusion shell, therefore, has obtained fixing space between the inside face top of ring portion 55 and diffusion shell.Because formed a plurality of through holes 57 on abutment wall, gas flow path 52 can be played in this space.Because the burning of the gas generant 9b among the second combustion chamber 5b, gas flow path 52 is communicated with by the through hole on the cylinder element 4 10 with the second combustion chamber 5b.So the burning gases via through holes 10 that produces in the second combustion chamber 5b is discharged to gas flow path 52,, discharge from gas discharge outlet 26 again by cooling vessel/filter 22.

In the gas generator that constitutes in the above described manner, the first combustion chamber 5a and the second combustion chamber 5b can be interconnected by the mesh space of cooling vessel/filter 22, yet, be stored in burning gases that the gas generant in each combustion chamber the produces cooling vessel/filter of flowing through, and discharge from gas discharge outlet 26.Therefore, the flame that produces at the gas generant of at first lighting a fire and lighting can not make the gas generant igniting that is stored in another combustion chamber.The single hole gas generant 9a that is stored among the first combustion chamber 5a only can be activated because of the igniting of the first firing unit 12a, and the porous gas propellant 9b that is stored among the second combustion chamber 5b only can be activated because of the igniting of the first firing unit 12b.

Therefore, even under the situation of (staggering) is significantly staggered in the startup timing of two firing unit 12a and 12b, in gas generator shown in this figure, the flame of the gas generant of the firing unit igniting that at first is activated can not lighted the gas generant that is stored in another combustion chamber yet, so, in the gas cylinder combustion experiment, can obtain stable gas cylinder curve.This is particularly advantageous for the situation that starts secondary igniter 12b after the schedule time that starts the first firing unit 12a.Equally, in gas generator shown in Figure 4, because the not sealed sealing of through hole 10, do not using stream to form under the situation of element, the burning gases that produce in the first combustion chamber 5a can be by the through hole 10 on the inner cylindrical element 4, thus igniting and light gas generant 9b among the second combustion chamber 5b.Yet (5a when having formed as the different stream in the present embodiment in 5b), by cooling vessel/filter 22 and be discharged from, but can not make gas generant 9b igniting among the second combustion chamber 5b at the burning gases that produce in a combustion chamber 5a at each combustion chamber.The result who does like this is, the gas generant 9b that is stored among the second combustion chamber 5a can randomly light a fire and lights by starting secondary igniter 12a.In the gas generator of present embodiment, the not sealed sealing of through hole 10.But even under 10 sealed the osed top situations in hole, the gas generant in each combustion chamber also can separated ignition and is lighted.Therefore, according to the actual conditions that the vehicle bump, can adjust the output performance of gas generator to greatest extent.

Here, in the gas generator shown in Figure 4, be arranged among the second combustion chamber 5b, do not separate in the cylinder 14 and be not arranged on by the flame assistant 16b of secondary igniter 12b igniting.By flame assistant 16b is set by this way, because the startup of secondary igniter 12b is fought when being lighted by point, flame can be lighted the gas generant 9b that is stored in second combustion chamber equably as flame assistant 16b.Furtherly, flame assistant 16b can directly not lighted by the flame of the flame assistant 16a among the first flame assistant supply room 15a.In Fig. 4, the parts identical with Fig. 1 have omitted its description here with identical numeral.

Below, the gas generator that use is had structure shown in Figure 4 carries out above-mentioned gas cylinder combustion experiment, and its startability of description is please referring to Fig. 5.In this experiment, have difform gas generant and join in the corresponding combustion chamber with different amounts.In gas cylinder curve shown in Figure 5, gas generant 9a's in first combustion chamber among the 5a---face area of unit weight gas generant---be less than gas generant 9b among the second combustion chamber 5b, addition ratio between the gas generant, i.e. the first gaseousness agent is 35/6 to the ratio of second gas generant.

In Fig. 5, " A igniting " expression has only the gas generant 9a among the first combustion chamber 5a to be lighted the gas cylinder curve of acquisition owing to the startup of the first firing unit 12a in the gas generator shown in Figure 4.It is comparatively mild that this gas cylinder curve rises.This is because the gas generant 9a among the 5a---face area of unit weight gas generant---is less than gas generant 9b among the second combustion chamber 5b in first combustion chamber, can be after igniting ignition combustion at a heat.

(12a 12b) is activated and lights simultaneously gas generant (9a, the gas cylinder curve that 9b) is obtained among the first and second combustion chamber 5a and the 5b simultaneously and " A+B (simultaneously) igniting " expression is when first and second firing units.In this gas cylinder curve, (12a, in the time of 12b), storage pressure sharply rises simultaneously when actuation signal sends to two firing units.This is because the gaseousness agent 9b among the 5b has bigger in second combustion chamber---the face area of unit weight gas generant, thus when igniting, discharged burning gases by ignition combustion at a heat simultaneously.Because the burning gases that the gas generant 9a among the first combustion chamber 5a produces produce continuously, therefore, a period of time has been kept in the rising of delivery curve (gas cylinder curve).

" A+B (T millisecond delay) igniting " expression first firing unit 12a is activated and at first behind the first gas generant 9a among ignition chamber's combustion chamber 5a behind the T millisecond, secondary igniter 12b is activated and lights the gas cylinder curve that gas generant obtained among the second combustion chamber 5b.This curve is identical with gas cylinder curve " A igniting " basically before the T millisecond, still, is activated back (after being the T millisecond) gas cylinder curve at secondary igniter 12b and rises at a heat.This is because gas generant 9b burning has increased the gas flow that produces sharp among the second combustion chamber 5b.Here, in " A+B (T millisecond delay) igniting " gas cylinder curve, peak output value (X kPa) is higher than the peak output value (YkPa) in " A+B (simultaneously) igniting " gas cylinder curve.This is because under the situation of " A+B (simultaneously) igniting ", two combustion chamber (5a, gas generant (A 5b), 9b) light at a heat, and on the other hand, " A+B (T millisecond delay) igniting " then is that the second gas generant 9b among the second combustion chamber 5b postpones to be lighted a fire afterwards and light than the first gas generant 9a among the first combustion chamber 5a, so the heat that produces is remained on the level continuously.

As mentioned above, in " A+B (T millisecond delay) igniting " shown in Figure 5, secondary igniter 12b is activated after the first firing unit 12a is activated the T millisecond.Delay can be set at optional time gap by the point of adjustment ignition circuit.Decision circuitry judge the vehicle when bump speed or rider's attitude (as the height of people's sitting height, or the attitude that the motorist kept), or similar situation at that time to be setting suitable delay time and actuation point device, thereby can make air bag in all cases with the modes of inflation inflation of optimum.

Embodiment 3

Fig. 6 is the sectional side elevation of another embodiment of the present invention's gas generator of being used for air bag.The structure of this gas generator is particularly suitable for being arranged on passenger's side.

The casing 103 of gas generator shown in this figure is cylindrical, its core length is greater than the diameter of its outermost, on its perisporium, have a plurality of gas discharge outlets, gas generator also has the igniting element that starts because of collision, thereby because of igniting element igniting with light the gas generant (9a that produces the burning gases that make airbag aeration, 9b), the cooling vessel/filter of the burning gases of cooling and/or purified gases propellant generation.Then, be arranged on two combustion chamber (105a in the casing 103,105b) be formed separately and be cylindrical combustion chamber 105a and annular combustor 105b, casing 103 axially on adjacent and concentric mutually, intercommunicating pore 110 is set makes between combustion chamber 105a and the 105b and be communicated with.

Gas generator in the present embodiment is axially elongated, because casing is oval tubular in the axial direction.The gas generator of this shape can have simple structure, and be easy to make, simultaneously, as mentioned above, by combination collocation cylindrical combustion chamber 105a and these two combustion chambers of annular combustor 105b are set, their with one heart adjacent and two combustion chambers are interconnected, the randomly output of adjustments of gas producer and the output timing (timing) of rising.

Then, igniting element comprises two or more owing to the firing unit that starts of collision, and (12a 12b) is arranged on and causes in the ring 113 and be parallel to each other corresponding firing unit, forms an assembly and is easy to assemble.In addition, be fixed on cause in the ring 113 and be stored in firing unit in the casing (12a, 12b), with respect to the axle of casing with one heart.

Furtherly, being essentially columnar cooling vessel/filter 122 is arranged in the casing 103, relative with the inside circumference of casing (oppose) formed a plurality of exhausr ports 126 on the inside circumference of casing, obtain predetermined gap between filter 122 and casing inside circumference.The first combustion chamber 105a be defined and installed cooling vessel/filter the space adjacent, comprise that (12a, igniting element 12b) is provided with two firing units with one heart, and is adjacent with the first combustion chamber 105a.Because the footpath that the second combustion chamber 105b is limited to igniting element is upwards, makes the first combustion chamber 105a and the second combustion chamber 105b, axially adjacent mutually at casing 103.Different gas generant (9a, 9b) join first and second combustion chambers respectively, in the gas generator shown in this figure, second gas generant of columnar pory first gas generant 9a and columnar single hole is stored in respectively among the first combustion chamber 105a and the second combustion chamber 105b.

Above-mentioned igniting element comprises the flame assistant, the flame assistant because firing unit (12a, startup 12b) is lighted a fire and is lighted, and make gas generant (105a by its flame, 105b) igniting, the flame assistant is spaced and is used for each firing unit, and lights a fire individually and light each firing unit.The space that storage is separated the flame assistant that is used for each firing unit is limited by cylinder element, the first flame assistant supply room 115a that stores the first flame assistant 116a is communicated with the first combustion chamber 105a by the flame transfer hole 119 that is positioned on the next door 107, next door 107 is arranged between the igniting element and the first combustion chamber 105a, the second flame assistant supply room 115b that stores the second flame assistant 116b is communicated with the second combustion chamber 105b by the flame transfer hole 117 that forms on the cylinder element 104, and cylinder element 104 defines supply room 115b.When sealing band 11 broke owing to the burning of gas generant 9b, the first combustion chamber 105a and second combustion chamber can be communicated with by through hole 110.

In gas generator shown in this figure, when the first firing unit 12a is activated, the first flame assistant 116a among the first flame assistant supply room 115a is lighted a fire and is lighted, and flame is by 119 igniting of the flame transfer hole on the next door element 107 and light the gas generant 9a that is stored among the first combustion chamber 105a.When the cooling vessel of flowing through/filter 122, burning gases are purified and cool off, and discharge from gas discharge outlet 126.On the other hand, when secondary igniter 16b started, the second flame assistant 116b among the second flame assistant supply room 115b was lighted a fire and is lighted, torch ignition and the gas generant 9b that lights among the second combustion chamber 105b.The through hole 110 of the burning gases that produce in the second combustion chamber 105b on through 107 flows through the first combustion chamber 105a, is purified when the cooling vessel of flowing through/filter 122 and cools off, and then, discharges from gas discharge outlet 126.When the same cooling vessel of flowing through/filter 122, the burning gases that first gas generant and second gas generant produce all are purified and cool off.In the present embodiment, gas discharge outlet 126 is by sealing band 127 sealings.Sealing band 127 is used to make gas generant and outside moisture content to isolate, and can break because of the flame that the gas generant burning produces, and discharges burning gases.Therefore the combustion performance (burning internal pressure) that sealing band 127 can not the control gaseous propellant.Furtherly, flame transfer hole 119 and flame transfer hole 117 are respectively by sealing band 20 and 18 sealings.

In addition, the intercommunicating pore 161 of two Room is set on the dividing element (sectioning member) 160 in the space of separating the first combustion chamber 105b and installation cooling vessel/filter 122, (105a, the burning gases that produce in 105b) reach the space of installation cooling vessel/filter 122 through intercommunicating pore 161 at first combustion chamber and second combustion chamber.According to this embodiment, on dividing element 160, form and the essentially identical intercommunicating pore 161 of cooling vessel/filter 122 internal diameter sizes.The gas generant 9a in first combustion chamber on intercommunicating pore 161, places wire gauze 162, so that can not move to the side of installation cooling vessel/filter 122 when burning.For this wire gauze 162, can be the wire gauze of any kind of, needing only its mesh size is enough to prevent moving of the first gas generant 9a in combustion process, and does not have ventilation resistance (draft resistance) with the control combustion performance.

As mentioned above, in gas generator shown in this figure, be stored in respective combustion chamber (105a, gas generant (9a 105b), 9b) by regulating two firing unit (12a, run up time 12b) and light a fire and light, therefore, the output form of gas generator (Starting mode) can randomly be regulated.Therefore, in all cases, under the various situations such as speed when bumping (impact) and ambient temperature, the air bag in the airbag apparatus cited below is most suitably inflated as the vehicle.

In the embodiment shown in fig. 6, two combustion chambers can be directly upwards adjacent mutually at casing, also can be as shown in Figure 7, and adjacent mutually on axially at casing.Therefore, in gas generator shown in Figure 7, the second combustion chamber 105b ' extends on casing is axial, and by the partition 107 ' bending that limits the first combustion chamber 105a ' and igniting element and limit the second combustion chamber 105b ' in the axial direction, therefore make its end form flange shape, and make it to contact with the inside circumference of casing.Consequently, in gas generator shown in Figure 7, second combustion chamber with extending axially, that is to say a side that extends to first combustion chamber, therefore, first combustion chamber and second combustion chamber are radial and axial adjacent one another are casing.Furtherly, in this embodiment, if on perisporium, provide next door 107 (the flanged end extension in next door to be contacted, as shown in Figure 8 with dividing element 160, the first combustion chamber 105a " (with the second combustion chamber 105b ") (footpath at casing is upwards adjacent mutually, and with one heart.Therefore, the increase of the volume of second combustion chamber can not lacked than gas generator shown in Figure 7.Especially, because gas generator shown in Fig. 7 and 8 can increase the volume of second combustion chamber, this is especially easily under the situation of a large amount of use second gas generants.In addition, in the gas generator shown in Fig. 7 and 8, according to the mode identical with gas generator shown in Figure 6, nature can obtain such gas generator that is used for air bag, this gas generator can have simple form and can be littler, randomly adjustments of gas producer output form (startability).In gas generator shown in Fig. 7 and 8, identical reference number represent with Fig. 6 in components identical, it is described in this and is omitted.

Embodiment 4

Fig. 9 is the sectional side elevation of another embodiment of the present invention's gas generator of being used for air bag.The structure of gas generator shown in this Fig is particularly suitable for being arranged on driver side, and its mode is identical with the mode of Fig. 1 and gas generator shown in Figure 4.

In gas generator shown in this figure, the first gas combustion chamber 305a and the second gas combustion chamber 305b are separated by inner cylindrical element 304, and are arranged in the casing 3, and be therefore, adjacent with one heart mutually.Ladder notch portion 306 is arranged on the inner periphery surface of inner cylindrical element 304 with predetermined height, and the partition 307 that limits the second combustion chamber 305b and igniting element supply room 308 is arranged on the ladder notch portion 306.In this embodiment, partition 307 is shown in the transparent view of open mode of Figure 10, by constituting with the ladder notch portion 306 ingear stripper loop elements 350 of inner cylindrical element 304 and with stripper loop element 350 ingear seal cup elements 360.Stripper loop element 350 forms dull and stereotyped annular basically, has peristome 351, it is interior for the flame assistant supply room 361 that seal cup element 360 cited below is installed, stripper loop element 350 also has annular opening portion 352, obtain by digging out an annular basal surface, the top that is used for storing spot firearm 312b, and the second flame assistant transfer hole 319 that extends and pass annular opening central authorities basically.In addition, seal cup element 360 has cylindrical shape flame assistant supply room 361, be installed in the aperture portion 351 of stripper loop element 350, and cylindrical shape firing unit receiving port 362, this receiving port forms on the position with respect to the annular opening portion 352 of stripper loop element 350, and extends to the side with respect to flame assistant supply room 361.The first flame assistant 316a is stored in the flame assistant supply room 361, and secondary igniter 312b is installed in the firing unit receiving port 362.Be installed in the aperture portion 351 of stripper loop element 350 by flame assistant supply room 361 seal cup element 360, stripper loop element 350 and seal cup element 360 are meshing with each other, and the upper end that upwards is installed to the secondary igniter 312b of firing unit receiving port 362 is exposed to the annular opening portion 352 of stripper loop element 350.

As shown in Figure 9, by stripper loop element 350 and seal cup element 360 partition 307 that constitutes and ladder notch portion 306 engagements that on inner cylindrical element 304 inner periphery surfaces, form.That is to say that the periphery supporting of stripper loop element 350 is on ladder recess 306, and seal cup element 360 is by being supported with stripper loop element 350 contact surfaces.Furtherly, the periphery of seal cup element 360 is by being bent to form towards firing unit receiving port 362 equidirectionals, and curve 363 is installed in the groove (groove) 364 of perimeter surface in the inner cylindrical element 304.Therefore, stripper loop element 350 is by seal cup element 360 supporting, prevent its casing 3 axially on move.In addition, be installed to by the curve on the periphery that makes seal cup element 360 363 in the groove 364 of same periphery of inner cylindrical element 304, partition 307 (being seal cup element 360) and inner cylindrical element 304 are meshing with each other very close to each other.Therefore, in inner cylindrical element 304, be provided at the igniting element supply room 308 on the sealing shell-side 2 and be provided at the second combustion chamber 305b that spreads on the shell-side 1 and separate fully by the igniting element hermetically-sealed construction that comprises seal cup element 360 and groove 364 combinations.

The firing unit receiving port 362 that forms on seal cup element 360 so constitutes, make its skirt section scatter as flabellum (fan), O-shape ring 381 side that sets within it, like this, it and be stored between the secondary igniter 312b that stores in mouthfuls 362, and the sealing between receiving port 362 and the secondary igniter 312b has just realized.Because O-shape ring 381 compresses contact below with the firing unit retaining element of mentioning, firing unit retaining element 382 is with two firing unit (312a, 312b) be installed to one and cause in the ring 313, secondary igniter 312 is arranged on by the firing unit receiving port 362 of annular opening portion 352, seal cup element, O-shape ring 381 and firing unit and installs in 382 spaces that limited.So the first firing unit 312a and secondary igniter 312b are separated with the hermetically-sealed construction (to call " firing unit hermetically-sealed construction " in the following text) of firing unit retaining element 382 reliably by the skirt section that comprises firing unit receiving port 362, O-shape ring 381.Therefore, any one firing unit starts the space that the flame that is produced can not flow directly into another firing unit of storage.

Furtherly, in the present embodiment, two

firing unit

312a and 312b are installed in the same initiation ring 313, are easy to be arranged in the casing guaranteeing.Specifically, in the present embodiment, two

firing unit

312a and 312b by with cause 382 supportings of ring 313 ingear firing unit retaining elements, and be fixed to and cause in the ring 313.Firing unit retaining element 382 forms such shape, covers the upper surface of causing ring 313, and has a hole portion 384 and a supporting shoulder 383 by each firing unit top.Being arranged on two firing unit 312a causing in the

ring

313 and 312b is fixed to and is installed to outwardly on the firing unit retaining element 382 that causes on the ring 313.Cause in the ring 313 by using 382, two firing unit 312a of above-mentioned firing unit retaining element and 312b easily to be assembled into.In the gas generator shown in this embodiment, the first firing unit 312a forms different shapes with secondary igniter 312b, and its output form is also different, yet, also can use firing unit with identical output form.

In the start-up course of gas generator shown in the present embodiment, because first firing unit is started the torch ignition of generation and lights the first flame assistant 316a.Because firing unit hermetically-sealed construction, the flame that the first flame assistant 316a produces can not flow into the space that stores secondary igniter, because the igniting element hermetically-sealed construction that curve 363 on the seal cup element 360 and the groove on the inner cylindrical element 304 364 constitute does not flow into the second combustion chamber 305b yet.Therefore, the flame that the first flame assistant 316a produces can only flow into the first combustion chamber 305a by the first flame transfer hole 317 on the periphery of inner cylindrical element 304, lights a fire and lights the first gas generant 309a, thereby produce burning gases.The flame that secondary igniter 312b is started generation can only flow into the second combustion chamber 305b by the second flame transfer hole 319 that forms in the annular opening portion 352 on the stripper loop element 350, lights a fire and lights the second gas generant 309b, thereby produce burning gases.Specifically, in the gas generator shown in the present embodiment, the second flame assistant is not set, the second gas generant 309a is directly started the torch ignition of generation by secondary igniter 312b and is lighted.

The burning gases that the first gas generant 309a and the second gas generant 309b produce are purified by common cooler/filter 22 time and cool off, the gap 25 of flowing through, and discharge from gas discharge outlet 26.The burning gases that produce when the flame of firing unit and flame assistant by the time, the sealing

band

318 and 320 that seals the first and second flame transfer holes breaks, when burning gases by the time, the sealing band 27 of confining gas discharge orifice 26 breaks.

As mentioned above, when adjusting the point of ignition of gas generant 309a and 309b, thereby when just changing the startability of adjusting gas generator by the time of being excited that makes respective point firearm 312a and 312b, position at set-point firearm 312a and 312b forms setting element, the lead 15 of each firing unit of appointment connection '.Such setting element can be by using dissimilar adaptor union 16 ' realize on each firing unit, for example, and shown in the transparent view of the open mode of the main portion shown in Figure 11 a to 11d.In the setting element shown in Figure 11 a, its structure is such, on adaptor union, form a detent (or protruding projection) 17 ', on each firing unit, form detent (or projection) 17 ' locator protrusions (or groove) 18 ' be different.That is to say that the position of the groove on each adaptor union changes, when being installed to adaptor union 16 ' on the gas generator, if adaptor union 16 ' is not mounted in its normal direction, then adaptor union can not be installed in an orderly manner, can hinder mutually.In the setting element shown in Figure 11 b, only on an adaptor union 21 ', provide detent (or projection 19 ').That is to say, adaptor union 21a ' with groove (or projection) 19 ' can mesh with the firing unit 22 ' that projection (or groove) 20 ' is not provided at side, yet, do not have the adaptor union 21b ' of groove (or projection) 19 ' not mesh with the firing unit 22 ' that projection (or groove) 20 ' is arranged at side.Therefore, when assembling, find mounted connector 21 ' dislocation easily.In Figure 11 c, in each adaptor union, the shape at connection and engagement position 23 ' has nothing in common with each other.In Figure 11 d, the two-phase adaptor union is merged into one, further forms detent (or projection).In this setting element, can also suitably use to prevent connection error bonded assembly element.

In the gas generator shown in this embodiment, the first gas generant 309a and the second gas generant 309b light a fire and light owing to the first firing unit 312a and secondary igniter 312b start respectively, yet, it is that only the first firing unit 312a is activated and lights a fire that a kind of situation is arranged, thereby only makes the gas generant 309a igniting among the first combustion chamber 305a and light.This is equivalent to the second gas generant 309b and secondary igniter 312b is not lighted, and left behind.In this case, can give the processing of vehicle from now on, make troubles in the process such as discarded, therefore, preferably after starting gas generator (only referring to the first firing unit 312a), start secondary igniter 312b, the gas generant 309b among the second combustion chamber 305b is burnt in time delay (as 100 milliseconds or the longer) after-burning longer than normal delay point of ignition (as the 10-40 millisecond).After this, as shown in figure 12, can in the second combustion chamber 305b, provide auto ignition material 385, the transmission of the heat of combustion that auto ignition material 385 will produce owing to first gas generant 309 and lighted a fire and light.In this case, after the first firing unit 312a is activated, after the time longer, finish the igniting of the second gas generant 309b by auto ignition material 385 than the delay time (being the time gap that each firing unit is activated) of the normal startup secondary igniter 312b that is scheduled to.That is to say that for the startability of adjustments of gas producer, this is different from the retarded combustion (being the delay start of secondary igniter 312b) of the second gas generant 309b.When the start-up circuit that randomly postpones secondary igniter 312b during with the startability of adjustments of gas producer, the second gas generant 309b is not lighted a fire and is lighted.In this case, auto ignition material can be provided with the secondary igniter combination collocation.

The first combustion chamber 305a and the second combustion chamber 305b are limited by inner cylindrical element 304.Through hole 310 is arranged on the inner cylindrical element 304, and through hole 310 is by stainless steel sheet 311 sealings.Stainless steel sheet 311 is bonded on the inner cylindrical element 304 by the bonding material as adhesives and so on, and through hole 310 has only because the burning of the second gas generant 309b just can be opened, can be owing to the burning of the first gas generant 309a is opened.Through hole 310 is sealed by this way by stainless steel sheet 311, thereby is to light the second gas generant 309b because can prevent the flame that the burning of the first gas generant 309a produces by the through hole 310 inflows second combustion chamber 305b.Therefore, as long as this function can be guaranteed, except that this structure of stainless steel sheet 311 sealing through holes, fracture plate welds, bonds or is heat sealed on the inner cylindrical element with sealing through hole 310, or on the periphery of inner cylindrical element 304, provide recess, or the perisporium that forms inner cylindrical element 304 is so that its certain a part of thinner thickness, thus realize above-mentioned functions, wherein, the fracture plate meeting is owing to the pressure of the burning generation of second gas generant breaks, peels off (peel), melts or comes off.In addition, as shown in figure 13, can be provided be essentially annular guar plate (shielding) 386 to cover the through hole on the inner cylindrical element 304.Specifically, in gas generator shown in Figure 13, the sealing band of sealing through hole 310 is protected by guar plate 386, even first gas generant 309a burning has produced burning gases, sealing band can not break because of the burning of first gas generant yet.As mentioned above, in the present embodiment, 310 burnings because of the second gas generant 309b of the through hole on the inner cylindrical element 304 are broken, and can not break because of the burning of the first gas generant 309a.Therefore, the burning gases that at first produce in the first combustion chamber 305a can not flow into the second combustion chamber 305b, the gas generant 309b among the second combustion chamber 305b owing to secondary igniter 312b be excited (being the burning of auto ignition material 385 sometimes) put to fight and lighted.The burning gases that second gas generant 309b burning produces flow into the first combustion chamber 305a, and the through hole 310 through opening owing to burning, and be cooled device/filter 22 purifying and cooling are discharged from gas discharge outlet 26 then again.In Fig. 9-13, identical numeral and figure components identical, at this moment it be described in and be omitted.

Embodiment 5

Figure 14 is the scheme drawing of airbag apparatus of the present invention, comprises the igniting element of an electronic ignition type.

Airbag apparatus comprises gas generator 200, crash sensor 201, control unit 202, module cover (module case) and air bag 204.As for gas generator 200, use gas generator shown in Figure 1, regulate its startability, the starting stage in that gas generator starts, rider (occupant) is applied an as far as possible little collision.

Crash sensor 201 can constitute as semi-conductor type acceleration pick-up (acceleration sensor).This semi-conductor type acceleration pick-up so constitutes, to such an extent as to four semiconductor strain gauges that form on silicon substrate, when applying an acceleration/accel, silicon substrate can bend, and these semiconductor strain gauges are bridge joints.When applying acceleration/accel, produce pencil damage (beam defect) and stress on its surface.Because stress, the resistance of semiconductor strain gauge changes, and resistance variations is as being detected with the proportional voltage signal of acceleration/accel.

Control unit 202 has an igniting decision circuitry, is input to the igniting decision circuitry from the signal of semi-conductor type acceleration pick-up.When surpassing a certain value from the collision alarm of sensor 201, judging unit begins to calculate immediately, when result of calculation during above a certain value, sends an actuation signal to the firing unit 12 of gas generator 200.The control unit 20 of gas generator and firing unit 12 are connected by lead, and lead is stretched out in conplane same direction by the adaptor union of point of connection firearm 12.

Module cover 203 comprises module lid (cover) 205 by forming as polyurethane.Air bag 204 and gas generator 200 are stored in the module cover 203, therefore, can constitute a pad mould (pad module).When being installed to automobile driver at one's side the time, this a kind of pad mould is installed on the bearing circle 207 usually.

Air bag 204 is formed by nylon (as nylon 66), polyester etc., and air bag sack 206 centers on the discharge orifice of gas generator, and is fixed to folded state on the flange portion of gas generator.

When bump took place automobile, when the semi-conductor type acceleration pick-up detects collision alarm, this signal was sent to control unit 202, and when the collision alarm from sensor surpassed a certain value, control unit 202 began calculating.When result of calculation surpasses a certain value, to the firing unit 12 output actuation signals of gas generator 200.Therefore, firing unit 12 is activated, and makes the gas generant igniting, and gas is lighted and produced to gas generant.Gas is discharged in the air bag 204, and air bag breaks module lid 205, to put on the air, therefore, forms air cushion (cushion) to absorb the collision between bearing circle and the rider.

The gas generator embodiment that will describe below comprises two or more combustion chambers, each gas generator comprises two firing units, each gas generator comprises two different generation of gas elements, each gas generator comprises the firing unit with a lead, each gas generator has combustion chamber and igniting element in inner cylindrical element, each gas generator comprises auto ignition material.

Embodiment 6

Among the embodiment 1 that mentions in the above, the first gas generant 9a of perforated cylinder shape has seven holes, can be stored among the first combustion chamber 5a, and the columnar second gas generant 9b of single hole can be stored among the second combustion chamber 5b.As the columnar gas generant of single hole, can use, for example, its internal diameter is 0.5-1.5mm, preferred 0.8mm, and external diameter is 2-3mm, preferred 2.4mm, long 2-6mm, the gas generant of preferred 4mm, further, as seven apertures in the human head cylindrical shape gas generant, can use, for example, its internal diameter is 0.6-0.7mm, and external diameter is 5-5.3mm, the gas generant of long 5mm.As mentioned above,, be stored in after gas generant in the respective compartments takes fire, can change the occurring mode of burning gases by in each combustion chamber, storing gas generant respectively with difformity and different rate of burninies.By changing composition and proportion of composing or its amount, after corresponding gas generant begins to burn by this way, can realize adjusting to the burning gases occurring mode.

First gas generant that is shaped to perforated cylinder shape is by as shown in figure 22 method, specific its thickness.

As shown in figure 22, when at cross-sectional plane being when forming seven through holes on the circular organizator, is provided with a center through hole at the organizator center, other six holes be arranged on medium pore around.In Figure 22, centre distance (b), this center, two holes between corresponding two holes around being arranged on equate with the distance (c) at organizator edge, and furtherly, medium pore also equates with the width between centers between each hole (a) on every side.Comprise (a) and (b) and equilateral triangle (a) and comprise that (b), (c) and equilateral triangle (c) are mutually together.From medium pore six equilateral triangles are set, the center in six holes is arranged on the summit of equilateral triangle on every side.That is to say that in the above-mentioned gas propellant, distance (a) is (b) and (a) corresponding to the thickness of gas generant, further preferred these thickness (i.e. (a) (b) and (a)) are equal mutually.

As other embodiment of organizator, around the medium pore 18 holes can be arranged.The quantity in hole and structure is set is advantageously provided as stated above.The quantity in hole and structure is set can determines by the cooperation relation that is easy between process gas propellant, productive costs and the performance is not particularly limited.

Embodiment 7

In the embodiment shown in fig. 4, can in first combustion chamber and second combustion chamber, use dissimilar gas generants.As mentioned above, by in each combustion chamber, using different gas generants, in the identical mode of embodiment 1, even be stored in after gas generant in each chamber takes fire, also can change the occurring mode of burning gases, thereby can regulate the inflation mode with selecting.

Embodiment 8

In Fig. 6, even in the gas generator of two combustion chambers in limiting casing, when in respective combustion chamber, using dissimilar gas generants, be stored in after gas generant in each chamber takes fire, also can change the occurring mode of burning gases, therefore, the inflation mode of air bag also can be regulated.

Embodiment 9

In Fig. 9, use dissimilar gas generants in two combustion chambers that in casing, separate and form, its mode is identical with embodiment 1, even after the gas generant in each combustion chamber takes fire, also can change the occurring mode of burning gases, therefore, the inflation mode of air bag also can be regulated.

Embodiment 10

Specifically, the gas generator that is used for air bag shown in this figure the has been characterised in that combination collocation gas discharge outlet that forms on casing of gas generator shown in Figure 1 and the packing element of these discharge orifices of sealing is as sealing band.

By connection have gas discharge outlet diffusion shell 1 and with the diffusion shell in form in the casing 3 that the capsul 2 of interior storage space forms, gas generator has and is essentially columnar inner cylindrical element 4, thereby defines first combustion chamber in its outside.In addition, provide the ladder notch portion in the inner cylindrical element inboard, dull and stereotyped circular next door is arranged on notch portion, and the next door further is divided into inner cylinder inside two chambers, thereby forms second combustion chamber and igniting element supply room 8 at diffusion shell-side and sealing shell-side respectively.Therefore, in this gas generator, the first combustion chamber 5a and the second combustion chamber 5b provide in casing 3 with one heart, and in the radially adjoining setting of casing.Burning gases-be stored in first and second combustion chambers are lighted and produced to the igniting element of gas generant (9a, 9b)-will be started because of collision, will be stored in because of the firing unit that collision starts in the igniting element supply room 8.

In this embodiment, can also in first combustion chamber and second combustion chamber, use dissimilar gas generants, therefore, can most suitably change the inflation mode of air bag.

Provide through hole 10 on the inner cylindrical element 4 that limits the first combustion chamber 5a and the second combustion chamber 5b, through hole is by sealing band 11 sealings.Because when gas generant was lighted, sealing band 11 broke, two combustion chambers are communicated with by through hole 10.Should regulate the thickness of the material of sealing band, so that sealing band breaks when only the gas generant 9b in the second combustion chamber 5b is lighted.In the present embodiment, used thickness is the corrosion-resistant steel sealing band of 40 μ m.In addition, because the perforated area of through hole 10, does not therefore have the function of control combustion chamber 5b internal pressure greater than gas discharge outlet 26b.

Igniting element comprise two electronic ignition type firing units (12a, 12b), firing unit survey based on sensor and output and actuation signal is activated, firing unit provides in causing ring 13 in parallel to each other, thereby exposes its head.As mentioned above, owing to provide two

firing unit

12a and 12b in an initiation ring 13, two firing units have become one and have been fixed on the element that causes in the ring 13, therefore, are easy to be installed in the gas generator.Especially, in the gas generator shown in this figure, cause the size of ring and can insert in the inner cylindrical element 4.Therefore, by the lower end of the inner cylindrical element 4 of curling, firing unit can firmly fix easily, and (12a, the ring of igniting behind the initiation ring 13 12b) is fixed thereby have two firing units when inserting.When in causing ring 13 two

firing unit

12a and 12b being set, the direction of each firing unit is determined easily.

In this embodiment, being essentially columnar separation cylinder 14 is arranged in the space of causing between ring 13 and the next door 7, thereby centered on a firing unit 12b (calling secondary igniter in the following text), the first flame assistant supply room 15a and the second flame assistant supply room 15b are limited at its outside and inboard respectively, firing unit and be stored in the corresponding supply room with the flame assistant that firing unit constitutes igniting element.So, with firing unit constitute the flame assistant 16a of igniting element and 16b be separated into reliably two corresponding firing units (12a, 12b).When the flame assistant 16a in being stored in the first flame assistant supply room 15a was lighted, the sealing band 18 of the flame transfer hole on the sealing inner cylindrical element 4 broke, and therefore, the first flame assistant supply room 15a is communicated with the first combustion chamber 5a.Furtherly, when the flame assistant 16b in being stored in the second flame assistant supply room 15b was lighted, the sealing band 20 of the flame transfer hole 19 on the sealing next door 7 broke, and therefore, the second flame assistant supply room 15b is communicated with the second combustion chamber 5b.So, when the first firing unit 12a is lighted a fire (startup), start gas generator, torch ignition and light the flame assistant 16a that is stored among the supply room 15a, flame is by the flame transfer hole 17 on the inner cylindrical element 4, and lighting a fire and lighting is stored in the seven apertures in the human head gas generant 9a that is arranged in the supply room 15a first combustion chamber 5a radially.Secondary igniter 12b lights a fire and lights the second flame assistant 16b that is stored among the supply room 15b, flame is by the flame transfer hole 19 of supply room 15b on axially, lights a fire and lights the single hole gas generant 9b that is stored among (disposed on an extensionthereof) the second combustion chamber 5b that is positioned over its extension.The burning gases that produce among the second combustion chamber 9b pass through the through hole 10 of diffusion shell-side 1 on the inner cylindrical element 4, and flow into the first combustion chamber 5a.Especially, in gas generator shown in Figure 15, be provided with the separation cylinder 14 that causes between ring and the next door 7, to such an extent as to the lower surface of next door 7 and the upper surface that causes ring 13 provide corresponding to the hole portion 21 of separating cylinder 14 profiles, the top and bottom of separating cylinder 14 are suitable for corresponding hole portion.Separate cylinder 14 owing to be provided with by this way, the flame of the flame assistant that produces in flame assistant supply room can directly not lighted the flame assistant in another flame assistant supply room, is stored in the torch ignition that two gas generants in the combustion chamber produce by the burning of the flame assistant of zones of different respectively and lights.That is to say, when the flame assistant burns in separation cylinder 14 (i.e. the second flame assistant supply room), the pressure of the gas that burning produces makes separates the cylinder radial expansion, by the separation cylinder is set, the upper end of separation cylinder and bottom are bearing in suitable appropriate section securely by the perisporium of hole portion, therefore, place partition and cause between the ring and compare, can prevent burning gases and the leakage that transmits flame effectively with separating cylinder simply.

Purifying and cooling are arranged in the casing 3 by the cooling vessel/filter 22 of the burning gases that the gas generant burning produces, the inner circumferential surface of diffusion shell-side 1 one sides has covered anti-short-circuit component 23, therefore, burning gases can not pass through between the inside face 28 at the end face of cooling vessel/filter 22 and diffusion shell-side 1 top.Expand by producing for suppressing inside face 28 and filter 22 because burning gases etc., at cooling vessel/filter 22 arranged outside skins 24.For example, outer 24 can be formed by wire gauze, can also be formed by the perforated cylinder shape element that many through holes are arranged at all wall surfaces, perhaps by making the ribbon element with preset width be configured as the banded limiting layer formation that annular is obtained.The outside outer 24 forms gap 25, to such an extent as to burning gases can be by the whole surface of filter 22.

Gas generator of the present invention is characterised in that the sealing band that is formed at the gas discharge outlet on the diffusion shell-side 1 and/or seals it.As shown in figure 15, the gas discharge outlet 26a of two kinds of different-diameters and 26b are provided on the gas generator diffusion shell perisporium, can make a plurality of these mutually the same two kinds of discharge orifices.In this case, the diameter of gas discharge outlet 26a is greater than the diameter of gas discharge outlet 26b, and the quantity of respective aperture equates that the total open area of gas discharge outlet 26a is greater than gas discharge outlet 26b.In this embodiment, the diameter of gas discharge outlet 26a can be set at 3.0mm Φ, and hole count can be set at 10, and the diameter of gas discharge outlet 26b can be set at 2mm Φ, and hole count can be set at 6.In order to prevent that gas generant is subjected to external environment condition,, sealing band 27 is pasted on discharge orifice 26a and the 26b from diffusion shell 1 surrounding wall portion inner periphery surface as the influence of casing outside humidity.The width of sealing band 27 is enough to seal simultaneously and is arranged on axially last two kinds of gas discharge outlets of gas generator, preferably in upper end or the lower end of each gas discharge outlet 26a and 26b, and leave the well-to-do of 2-3mm between sealing band upper end or the lower end, the preferred sealing band that uses comprises that thickness is the alumiseal layer of 20 μ m to 200 μ m, with thickness be tack coat or the adhesion layer of 5 to 100 μ m, yet as long as can obtain required effect, the kind and the structure of sealing band are not particularly limited.In the present embodiment, use and to have tack coat or the adhesion layer that aluminium lamination that thickness is 50 μ m and thickness are 50 μ m.In the present embodiment, respective row outlet 26a and 26b be arranged on the gas generator casing axially, yet in order to obtain effect of the present invention, for example, the mode that the respective row outlet can circumference alternately is arranged on diffusion shell surrounding wall portion.Because the collocation of the combinations thereof of gas discharge outlet and sealing band, the pressure that is used to sealing band is broken can the branch two-stage be regulated.

In this structure, when gas generator is activated, for example, after making the firing unit energising of the seven apertures in the human head gas generant igniting among the combustion chamber 5a, when 30 milliseconds of constant durations start the firing unit of single hole gas generant igniting among the combustion chamber 5b, the burning [surface of the gas generant among the perforated area of gas discharge outlet 26a (diameter and hole count) and the combustion chamber 5a is relevant, and the burning [surface of the gas generant among the perforated area of gas discharge outlet 26b (diameter and hole count) and the combustion chamber 5b is relevant.Prior art is used the discharge orifice that a kind of aperture is only arranged, therefore, perforated area or only relevant with the face area of gas generant among the combustion chamber 5a, or relevant with all gas propellant face area among burning 5a and the 5b.In this case, when the gas generant among the combustion chamber 5a was lighted, the former was an optimum condition, yet, when the gas generant among combustion chamber 5b or combustion chamber 5a and the 5b was lighted simultaneously, combustion pressure raise too many, to such an extent as to the gas generator with excessive output can be provided.In addition, under one situation of back, when the gas generant among the combuster 5a at first burnt, in contrast, output became too little, to such an extent as to be difficult to obtain enough restraint performances in the airbag aeration initial stage.

According to the present invention, as described in present embodiment, because provide two kinds of discharge orifices with different perforated areas to be associated with the face area of gas generant in each combustion chamber, the mode that can optimize makes airbag aeration, and needn't take the timing of gas generant igniting into account.In this case, the perforated area of gas discharge outlet is set at two kinds, yet the fracture pressure by further increase kind and the multistage adjusting sealing band of branch can suppress because the output difference that ambient temperature produces.

In the gas generator that constitutes in the above described manner, in being arranged on igniting element supply room 8 and separate cylinder 14 outsides the first firing unit 12a when starting, being stored in flame assistant 16a among the first flame assistant supply room 15a is lighted a fire and is lighted, flame is lighted first gas generant with seven holes that is stored among the first combustion chamber 5a by the flame transfer hole 17 on the inner cylindrical element 4.When the secondary igniter 12b that is centered on by separation cylinder 14 starts, be stored in flame assistant 16b among the second flame assistant supply room 15b and lighted a fire and light, torch ignition and light the columnar second gas generant 9b of the single hole that is stored among the second combustion chamber 5b.By after starting first firing unit, starting secondary igniter, perhaps start first and second firing units simultaneously, come the igniting timing of point of adjustment firearm 12a and 12b, make the output performance (startability) of gas generator randomly to regulate, therefore, as car speed when bump takes place and ambient temperature etc. under the various situations, below the inflation of air bag of said airbag apparatus can be only.Especially, in the gas generator shown in this figure, corresponding combustion chamber (5a, 5b) use difform gas generant (9a, 9b), the columnar second gas generant 9b of first gas generant 9a of perforated cylinder shape and single hole is stored in respectively among the first combustion chamber 5a and the second combustion chamber 5b.Furtherly, (5a, 5b) the amount difference of the gas generant in store 35g and 6g gas generant 9a and 9b respectively in the first combustion chamber 5a and the second combustion chamber 5b to be stored in each combustion chamber.Therefore, at this gas generator, output form can accurately be regulated.Certainly, can suitably change shape, composition, proportion of composing and the amount etc. of gas generant to obtain required output form.

According to the present invention, as mentioned above since combination collocation two or more firing units and two or more gas discharge outlets, the internal pressure uniformization during the gas generator operation can the smooth combustion performance.

Gas generator shown in Figure 16 has and same structure shown in Figure 15, exception be that gas discharge outlet on the diffusion shell of casing and the formation of sealing its sealing band change to some extent, with components identical among Figure 15 with identical numeral, omitted its description here.Figure 16 is equivalent to such an embodiment, and the perforated area of each discharge orifice is identical, yet the thickness difference of sealing band is regulated fracture pressure with minute two-stage.In this case, gas discharge outlet 26a and 26b axially are provided with perpendicular to casing, and the thickness of the sealing band 27b of confining gas discharge orifice 26b is greater than the sealing band 27a of confining gas discharge orifice 26a.Yet for the thickness of output performance (operating characteristic) sealing band of adjustments of gas producer is restricted, the internal pressure when lighting gas generant is regulated by the perforated area of gas discharge outlet.Equally, sealing band to the burning maximum internal pressure without any influence.The perforated area of gas discharge outlet 26a and 26b (diameter and hole count) is identical.In this case, for example, regulate discharge orifice 26a and sealing band 27a and thickness, so that when the gas generant 9a among the combustion chamber 5a is lighted, the sealing band 27a of confining gas discharge orifice 26a all breaks.When the gas generant 9b among the combustion chamber 5b is lighted in succession, or when the gaseousness agent 9a among combustion chamber 5a and the combustion chamber 5b and 9b are lighted simultaneously, produce higher burning internal pressure.In this case, thicker sealing band 27b pastes on the gas discharge outlet 26b, all breaks so that cover sealing band 27a and the 27b of all gas discharge orifice 26a and 26b.That is to say that the gas generant 9a burning that the thickness of the sealing band 27a on the gas discharge outlet 26a is adjusted among the combustion chamber 5a time is broken, the sealing band 27b on the gas discharge outlet 26b needn't break.Therefore because the face area of the gas generant among the combustion chamber 5a only the perforated area with discharge orifice 26a is relevant, gas generant has presented the burning of optimizing.Furtherly, when the gas generant 9b among the combustion chamber 5b postpones to light, or the gas generant 9a in two combustion chambers and 9b are when being lighted simultaneously, produce higher combustion pressure, make the sealing band 27b on the gas discharge outlet 26b break, the rising of internal pressure is restricted, and can realize that air bag randomly inflates, and needn't take point of ignition into account.As shown in figure 15, in this case, the material of sealing band and structure are provided with the mode of gas discharge outlet etc., be not by the limiting factor (s) of the required effect of acquisition, and can use optional specification.In addition, by dividing multistage change thickness, can obtain to be subjected to the less gas generator of influence of ambient temperature etc. in the same way.

In two embodiment shown in Figure 15 and 16, only exemplified the single kind of mode that changes the perforated area of gas discharge outlet or only change the thickness of sealing band, yet, can simultaneously dual mode be changed or adjust.

Embodiment 11

Figure 17 is the sectional side elevation of another embodiment of the present invention's gas generator of being used for air bag, shows another embodiment.The structure of this gas generator is particularly suitable for being arranged on the passenger at one's side.

On the perisporium of the casing 103 of gas generator shown in this figure a plurality of gas discharge outlets are arranged, perisporium is cylindrical, its core length is greater than its external diameter, this gas generator has the igniting element that can start because of collision, thereby can and light the gas generant that produces the burning gases that make airbag aeration by igniting element igniting, and be used to cool off and/or the cooling vessel/filter 122 of the burning gases that purifying is produced by gas generant.(105a 105b) provides two combustion chambers in the casing 103 with one heart, and therefore, axially adjacent mutually at casing 103 provides one to allow the intercommunicating pore 110 that is communicated with between combustion chamber 105a and the 105b.

The gas generator of present embodiment is axially longer, because casing has formed oval tubular in the axial direction.In the gas generator of this shape, a kind of simple in structure, gas generator of being easy to make can be provided, simultaneously, by two mutual

adjacent burning

105a and 105b being provided with one heart and two combustion chambers being interconnected, the output of gas generator and the timing (timing) of output rising can randomly be regulated.

Because igniting element comprises two or more firing units that can start because of collision, (12a 12b) is provided at one and causes on the ring 113 and be parallel to each other corresponding firing unit, is easy to form assembly.

Furtherly, in casing 103, be essentially of the inner circumferential surface setting of columnar cooling vessel/filter 122, on casing, formed a plurality of gas discharge outlet 126a and 126b, between filter 122 and casing inside circumference, guaranteed predetermined gap 125 with respect to casing.The first combustion chamber 105a is adjacent with the space that stores cooling vessel/filter 122, comprises that (12a, igniting element 12b) is provided with two firing units with one heart, and adjacent with the first combustion chamber 105a.In addition, the second combustion chamber 105b of annular is limited to igniting element radially, the first combustion chamber 105a and the second combustion chamber 105b casing axially on adjacent one another are.Different gas generant (9a, 9b) be loaded in respectively in first and second combustion chambers, in gas generator shown in this figure, the columnar second gas generant 9b of first gas generant 9a of perforated cylinder shape and single hole is stored in respectively among the first combustion chamber 105a and the second combustion chamber 105b.Therefore, the output performance of gas generator can be only.

Above-mentioned igniting element comprises can be because of firing unit (12a, thereby 12b) started and light a fire and light with its flame make gas generant (105a, 105b) Dian Huo flame assistant is for each firing unit, the flame assistant is spaced from each other, separated ignition and lighting in each firing unit.The space that stores the flame assistant of first firing unit is limited by circle tube element, store the first flame assistant supply room 115a of the first flame assistant 116a, by being arranged on the flame transfer hole 119 on the partition 107 between the igniting element and the first combustion chamber 105a, be communicated with the first combustion chamber 105a, store the first flame assistant supply room 115b of the second flame assistant 116b, by being arranged on the flame transfer hole 117 on the cylinder element 104, be communicated with the first burning 105b.The first combustion chamber 105a and the second combustion chamber 105b are communicated with by the through hole on the partition 107 110.

In gas generator shown in this figure, when the first firing unit 12a is activated, flame assistant 116a among the first flame assistant supply room 115a is lighted a fire and is lighted, flame is by the flame transfer hole 119 on the partition 107, igniting and light the gas generant 9a that is arranged among the first combustion chamber 105a, thus burning gases produced.When by cooling vessel/filter 122, burning gases are purified and cool off, and discharge from gas discharge outlet then.On the other hand, when secondary igniter 12b was activated, the flame assistant 116b among the second flame assistant supply room 115b was lighted a fire and is lighted, its torch ignition and light the gas generant 9b that is arranged among the second combustion chamber 105b.The burning gases that produce in the second combustion chamber 105b flow through the through hole 110 on the partition 107 by the first combustion chamber 105a inboard, and when by cooling vessel/filter 122, burning gases are purified and cool off, and discharge from gas discharge outlet then.Furtherly, in gas generator shown in this figure, be communicated with through hole 110 sealing bands 111 sealing of first combustion chamber and second combustion chamber, sealing band 111 has only when the gas generant in second combustion chamber burns and just breaks.In addition, in gas generator shown in this figure, the mode identical with gas generator shown in Figure 14, gas discharge outlet comprises the gas discharge outlet 126b of large diameter gas discharge outlet 126a and minor diameter, they are by sealing band 127 sealings.Equally, in embodiment illustrated in fig. 17, also can be identical by the thickness that keeps sealing band, and the perforated area of gas discharge outlet is set at shown in Figure 15 two kinds, thereby always can the most suitably regulate the output of optimization, and needn't take fracture pressure and the gas generant 9a of combustion chamber 105a and 105b and the combustion-delaying time timing (timing) of 9b of control sealing band into account.Gas discharge outlet is positioned on the cylindrical box upper perimeter wall, and the face area of the gas generant 9a among the combustion chamber 105a is relevant with gas discharge outlet 126a, and the face area of the gas generant 9b among the burning 105b is relevant with the perforated area of gas discharge outlet 126b.Because it is identical with gas generator shown in Figure 15 that it starts principle, omit its detailed description here.

In addition, on the dividing element 160 in the space that limits the first combustion chamber 105a and storage cooling vessel/filter 122, provide the intercommunicating pore 161 that is communicated with two Room, (105a, 105b) the middle burning gases that produce reach the space of storage cooling vessel/filter 122 by intercommunicating pore 161 at first and second combustion chambers.According to this embodiment, its size intercommunicating pore 161 substantially the same with cooling vessel/filter 122 internal diameters is formed on the dividing element 160.Wire gauze 162 is placed on the intercommunicating pore 161, and therefore, when burning, the gas generant 9a among the first combustion chamber 105a can not move to a side of storage cooling vessel/filter 122.Wire gauze that can any kind does not move in combustion process as long as its mesh is enough to prevent the first gas generant 9a as wire gauze 162, and does not control the ventilation resistance of combustion performance.

As mentioned above, in gas generator shown in this figure, by regulating two firing unit (12a, run up time 12b), be stored in respective combustion chamber (105a, (9a 9b) is lighted a fire respectively and is lighted gas generant 105b), to such an extent as to the output form of gas generator (startability) can randomly be regulated.Therefore, under the situations such as car speed as the generation bump time and ambient temperature, can make the air bag of the airbag apparatus of mentioning below inflating expanded in only mode.

In Figure 17, two combustion chambers that provide in casing are axially upwards adjacent one another are with the footpath casing.Specifically, in gas generator shown in Figure 17, by making the first combustion chamber 105a and in partition 107 bendings that axially limit the igniting element and the second combustion chamber 105b, thereby formation flanged end, and make it to contact with the inside circumference of casing, the second combustion chamber 105b extends on casing is axial.Therefore, in gas generator shown in Figure 17, second combustion chamber extends in the axial direction, that is to say, extends to the side of first combustion chamber, thereby first combustion chamber and second combustion chamber are axially upwards adjacent one another are with the footpath.Because gas generator shown in Figure 17 can increase the volume of second combustion chamber, under the situation of using a large amount of second gas generants, they are very easily.

Figure 18 is the cut-away view of an embodiment of gas generator; main with the rider on the mode confining guard co-pilot seat shown in Figure 17; the structure of illustrated embodiment is such; each discharge orifice perforated area remains unchanged as Figure 16, but the thickness that changes its sealing band is to regulate fracture pressure.Be that gas discharge outlet 126a and 126b axially are provided with perpendicular to casing, with respect to the thickness of the sealing band 127a of confining gas discharge orifice 126a, the thickness of the sealing band 127b of confining gas discharge orifice 126b is bigger.The perforated area of gas discharge outlet 126a and 126b (diameter and hole count) is identical.In the start-up course of gas generator shown in Figure 180, identical reference number represent with Fig. 3 in components identical, here the descriptions thereof are omitted.In addition, because the structure of gas discharge outlet and sealing band is identical with Figure 16 with operation, at this, its relevant description that starts is also omitted.

In the situation of the gas generator of the rider on Figure 17 and confining guard co-pilot seat shown in Figure 180; perforate kind by further increase discharge orifice and further increase the kind of sealing band thickness can be carried out specific adjusting in an identical manner to avoid the influence of ambient temperature etc.Certainly, the simultaneously perforated area of combination collocation discharge orifice and the thickness of sealing band.

Embodiment 12

Figure 19 is the sectional side elevation of another embodiment of the present invention's gas generator of being used for air bag.The structure of gas generator shown in this figure is the same with gas generator shown in Figure 15 and 16 to be particularly suitable for being arranged on chaufeur at one's side.

The structure of gas generator shown in Figure 19 is same as shown in Figure 15, difference is inner cylindrical element inside is separated into the structure of the partition of second combustion chamber and igniting element supply room, therefore, identical reference number is represented the components identical with Figure 15, in that the descriptions thereof are omitted a bit.

Specifically, the structure of gas generator is such shown in this figure, the partition 307 that the inner cylindrical element inboard is defined as dull and stereotyped ring of being basically of second combustion chamber and igniting element supply room comprises: with the ladder notch portion 306 ingear stripper loop elements 350 of inner cylindrical element 304 and with stripper loop element 350 ingear seal cup elements 360, as shown in Figure 2 shown in the transparent view of open mode.

As shown in figure 19, ladder notch portion 306 engagements that form on the partition 307 that comprises stripper loop element 350 and seal cup element 360 and inner cylindrical element 304 inner periphery surfaces.The periphery that is stripper loop element 350 is by 306 supportings of ladder notch portion, and seal cup element 360 contacts and is supported with stripper loop element 350.Furtherly, the periphery of seal cup element 360 is being by being bent to form with firing unit receiving port 362 equidirectionals, and curve 363 is installed in the groove 364 on inner cylindrical element 304 inner periphery surfaces.Therefore, stripper loop element 350 is by seal cup element 360 supporting, prevent casing 3 axially on move.Furtherly, in the groove of the inner periphery surface by the curve 363 on seal cup element 360 peripheries being installed to inner cylindrical element 304, partition 307 (being seal cup element 360) and inner cylindrical element 304 mesh very close to each otherly.Therefore, in inner cylindrical element 304, the reliable in structure ground that the second combustion chamber 305b in igniting element supply room 308 in the sealing shell-side 2 and the diffusion shell-side 1 is made up of the combination collocation that comprises seal cup element 360 and groove 364 separates.

The structure of the firing unit receiving port 362 that forms on seal cup element 360 is such, scatter as flabellum in its skirt section, O-shape ring 381 side that sets within it, like this, it and be stored between the secondary igniter 312b that stores in mouthfuls 362, and store mouthfuls 362 and secondary igniter 312b between sealing just realized.Because O-shape ring 381 compresses contact below with the firing unit retaining element of mentioning 382, firing unit retaining element 382 is with two firing unit (312a, 312b) be installed to one and cause in the ring 313, secondary igniter 312 is arranged on by the firing unit receiving port 362 of the annular opening portion 352 of stripper loop element, seal cup element, O-shape ring 381 and firing unit and installs in 382 spaces that limited.When the sealing band 320 of the second flame transfer hole 319 in the annular opening portion 352 of sealing stripper loop element 350 broke owing to secondary igniter 312b starts, restricted space was communicated with the second combustion chamber 305b.The first firing unit 312a and secondary igniter 312b by the hermetically-sealed construction of the skirt section that comprises firing unit receiving port 362, O-shape ring 381 and firing unit retaining element 382 (with call in the following text " the firing unit hermetically-sealed construction) separate reliably.Therefore, a firing unit starts the space that the flame that produces can not flow directly into another firing unit of storage.The shape of firing unit retaining element 382 can cover the top of causing ring 313, has a hole portion 384 and a bearing shoulder 383 by the top of each firing unit.Be arranged on two firing unit 312a causing in the ring 313 and 312b and be fixed to and be installed to outwardly on the firing unit retaining element 382 that causes on the ring 313, two firing unit 312a and 312b are easy to be assembled into and cause in the ring 313.In addition, in the gas generator shown in this embodiment, the first firing unit 312a is different with the size of secondary igniter 312b, has different output, yet, also can use firing unit with identical output.

In gas generator shown in this figure, with same way as shown in Figure 15, can regulate many

gas discharge outlet

26a and 26b on the casing, make it to have two or more opening diameters and/or perforated area.Therefore, when starting each igniting element, it is poor and make internal pressure equalization when gas generator starts to suppress the maximum internal pressure of casing, and the gas generator with smooth combustion performance is provided.In the gas generator of present embodiment, with same way as shown in Figure 16, can remain unchanged by the perforated area that makes each gas discharge outlet, change thickness as the sealing member of sealing band 27, regulating fracture pressure, thus the box house difference of pressure when suppressing each igniting element and starting.Furtherly, can realize opening diameter and/or the control of perforated area and the control of sealing member thickness simultaneously to gas discharge outlet.

Embodiment 13

In the air bag gas generator shown in the foregoing description 10-12, can provide in addition by the optional structure of making shown in Figure 20-21.

＜relate to the embodiment of combustion chamber through hole 〉

Figure 20 shows another embodiment of perforate part, thereby these holes are to be opened by the burning of second gas generant first combustion chamber is communicated with second combustion chamber.

Figure 20 a shows a kind of structure, the partition 504 (comprising inner casing) that limits first combustion chamber 550 and second combustion chamber 560 go up form hole portion 505 by the suitable shutter that forms 590 from outer side covers, shutter forms by ribbon element being shaped to ring-type, therefore, the flame of first gas generant can direct contact.Reference number 522 expressions second gas generant.Figure 20 b shows another kind of structure, thereby forms recess 512 aperture portion 505 on the perisporium of partition 504.Figure 20 c shows a kind of like this structure, and the thinner thickness of the perisporium part of partition 504 forms aperture portion 505.

Therefore, in the gas generator of the foregoing description 10-12, the aperture portion that is communicated with first combustion chamber and second combustion chamber forms by the mode of Figure 20, thereby is communicated with first combustion chamber and second combustion chamber.

＜relate to the embodiment of the location structure of firing unit and cable 〉

In the foregoing description 10-12, also can adopt and shown in Figure 3 carry location structure between cable actuation signal and that be attached thereto at two firing units with to each firing unit.

As mentioned above, in the gas generator shown in the embodiment 10-12, when the setting element that makes with each firing unit bonded assembly cable is provided, can obtain such gas generator that is used for air bag, reliably the startup of adjustments of gas producer.

As shown in Figure 3, the lead that connects each firing unit is pulled out from conplane same direction, specifically, as shown in the figure, preferably connects every lead through adaptor union, same plane parallel adaptor union is set.Adaptor union is preferably from pulling out every lead perpendicular to the axial equidirectional of casing.

＜relate to the embodiment of auto ignition material (AIM) 〉

Figure 21 shows a kind of gas generator that is used for air bag, and the auto ignition material (AIM) 385 that wherein is stored in second combustion chamber will be lighted a fire because of the heat of combustion that produces from the first next gas generant of casing 1 transmission such as grade.Because the burning of first gas generant, gas generator shown in this embodiment is lighted the gas generant 309b that is stored among the second combustion chamber 305b indirectly, when having only the first gas generant 309a to be lighted, after starting gas generator, gas generant 309b also is in the state of not lighted.This embodiment is described with reference to the gas generator that is used for air bag shown in Figure 12.

At the gas generator that is used for air bag shown in Figure 12, by starting the first firing unit 312a and secondary igniter 312b respectively, the first gas generant 309a and the second gas generant 309b are lighted a fire separately and are lighted usually.Sometimes, only first firing unit is by electric current energising igniting, has only the first gas generant 309a among the first combustion chamber 305a to be lighted a fire and lights.That is to say that the second gas generant 309b and secondary igniter 312b are not lighted, remainingly get off.So can in from now on processing, process such as discarded, can have a negative impact in this case, therefore, after gas generator (having only the first firing unit 312a) starts, preferably than normal delay point of ignition (as the 10-40 millisecond) after longer delay time (as 100 milliseconds or longer) start secondary igniter 312b, make the gas generant 309b burning among the second combustion chamber 305b.Therefore, as shown in figure 21, can in the second combustion chamber 305b auto ignition material 385 be set, these materials will be lighted a fire and lighted because of the conduction of the heat of combustion of the first gas generant 309a.In this case, the igniting of the second gas generant 309b that causes owing to the igniting of auto ignition material is to carry out after longer delay time than the normal scheduled delay that starts secondary igniter 312b after starting the first firing unit 312a (be between the firing unit startup at interval).In the process of the function circuit that randomly postpones secondary igniter 312b with the operating characteristic of adjustments of gas producer, the second gas generant 309b can not lighted a fire and lighted because of auto ignition material 385.In addition, auto ignition material 385 can be provided with the secondary igniter combination collocation.

This embodiment has carried out special description according to gas generator shown in Figure 12, in addition, in gas generator shown in

embodiment

10,11 and 13, also can in second combustion chamber auto ignition material be set.In this case, even second gas generant is not lighted after starting gas generator, because the conduction of the heat that the burning of first gas generant produces, second gas generant also can be lighted.

Embodiment 14

Figure 14 shows the embodiment of airbag apparatus of the present invention, and wherein airbag apparatus structurally comprises the gas generator that uses electronic ignition type igniting element.

Airbag apparatus comprises gas generator 200, crash sensor 201, control unit 202, module cover 203 and air bag 204.In gas generator 200, use the described gas generator of Fig. 1, its startability is the starting stage that starts at gas generator, applies to the rider that an as far as possible little impact regulates.

Crash sensor 201 can comprise, as the semi-conductor type acceleration pick-up.This semi-conductor type acceleration pick-up so constitutes, to such an extent as to four semiconductor strain gauges that form on silicon substrate, when applying an acceleration/accel, silicon substrate can bend, and these semiconductor strain gauges are bridge joints.When applying acceleration/accel, produce pencil damage and stress on its surface.Because stress, the resistance of semiconductor strain gauge changes, and resistance variations is as being detected with the proportional voltage signal of acceleration/accel.

Control unit 202 has an igniting decision circuitry, is input to the igniting decision circuitry from the signal of semi-conductor type acceleration pick-up.When surpassing a certain value from the collision alarm of sensor 201, judging unit begins to calculate immediately, when result of calculation during above a certain value, sends an actuation signal to the firing unit 12 of gas generator 200.

Module cover 203 comprises module lid 205 by forming as polyurethane.Air bag 204 and gas generator 200 are stored in the module cover 203, therefore, can constitute a pad mould.When being installed to automobile driver at one's side the time, this a kind of pad mould is installed on the bearing circle usually.

Air bag 204 is formed by nylon (as nylon 66), polyester etc., and air bag outlet 206 centers on the discharge orifice of gas generator, and is fixed to folded state on the flange portion of gas generator.

When automobile bumped, when semi-conductor type acceleration pick-up 201 detects collision alarm, this signal was sent to control unit 202, and when the collision alarm from sensor surpassed a certain value, control unit 202 began calculating.When result of calculation surpasses a certain value, to the firing unit 12 output actuation signals of gas generator 200.Therefore, firing unit 12 is activated, and makes the gas generant igniting, and gas is lighted and produced to gas generant.Gas is discharged in the air bag 204, and air bag breaks module lid 205, to put on the air, therefore, forms air cushion to absorb the impact between bearing circle and the rider.

Embodiment 15

In Fig. 1, igniting element comprises that (12a, 12b), firing unit is because sensor is activated because of the actuation signal that detects output two electronic ignition type firing units, and firing unit is parallel to each other to be fixed on one and to cause and encircle on 13, thereby axially aligning and exposing head.

The method of using above-mentioned initiation to encircle 13

attachment point firearm

12a and 12b is below described.As shown in Figure 2, at first firing

unit

12a and 12b are embedded into and cause in the ring 13, then, insert in the inner cylindrical element 4 of gas generators causing ring 13 to form an integral body.At this moment, separate in order to make

firing unit

12a and 12b, firing unit 12b is inserted into and separates in the cylinder 14.Afterwards, encircle 13 with fixing the initiation, can fix two firing units easily and reliably by the lower end of the inner cylindrical element 4 of curling.

In addition, (12a 12b) is fixed on when causing in the ring 13, can control the direction of each firing unit when two firing units that are provided with.In Fig. 1, two firing units are provided with one heart with respect to the center shaft of casing.(12a, under the situation of direction alignment 12b), shown in the back view of Fig. 2, (12a 12b) can pull out from same direction from same plane with the lead 50 of control unit (not shown) the point of connection firearm making two firing units.In Fig. 2, lead 50 through each

adaptor union

50a and 50b be connected to each firing unit (12a, 12b) on, adaptor union provides at grade and be arranged in parallel.L shaped by connecting these two adaptor unions to form, can be to the lead of firing unit transmission of electric signals (actuation signal) from pulling out perpendicular to the axial direction of casing (be casing radially), the lead that is connected to each firing unit also can be pulled out from same direction.

Embodiment 16

Figure 23 is the sectional side elevation of another embodiment of gas generator of the present invention, has only the mounting portion of firing unit to be different from the gas generator that is used for air bag shown in Figure 1.

Igniting element comprises two electronic ignition type firing unit (12a, 12b), the actuation signal that firing unit is exported based on detection by sensor starts, and firing unit is done as a wholely to be fixed on one by resin and to cause in the ring 13, parallel to each other in the axial direction and the alignment, expose its head.

Two

firing unit

12a and 12b do as a wholely to be fixed on one with resin 40 and to cause in the ring 13, this structure can with as following method realize.As shown in figure 24, at first prepare one within it portion the initiation ring 13 of recess (recess) space 13a is arranged, firing

unit

12a and 12b insert in the recess space 13a, afterwards, as shown in figure 25, inject resin 40 to make it sclerosis in recess space 13a.

Cause the installation portion of the shape and size of ring 13 corresponding to casing 3, recess space 13a needn't be suitable with the profile of firing

unit

12a and 12b at least less than firing

unit

12a and 12b.

Resin 40 is thermoplastic base resin or thermosetting resin, can use room temperature vulcanizing type or heat curing type, in case of necessity, can sneak into hardener, hardening accelerator etc.

As mentioned above, (12a, 12b), two firing units are fixed on and cause in the ring 13, have formed an element, therefore are easy to be assembled in the gas generator by provide two firing units with an integral body in an initiation ring 13.Especially, in gas generator shown in Figure 23, (12a after initiation ring 13 12b) inserts in the inner cylindrical element 4, will encircle 13 by the lower end of the inner cylindrical element 4 of curling with fixing the initiation having two monolithic devices firing units.

In addition, as Fig. 1 and 2, (12a, in the time of 12b), the direction of each firing unit is easy to control when two firing units are set in an initiation ring 13.

In addition, in gas generator shown in Figure 23, being arranged on initiation ring 13 places by this way with the cylinder 14 that separates between the partition 7, provide corresponding to the hole portion 21 that separates cylinder 14 profiles at the lower surface of partition 7 or the upper surface (surface of hardening resin 40) that causes ring 13, be embedded into corresponding hole portion with the upper end that will separate cylinder 14 or lower end.

Above-mentioned igniting element shown in Figure 23,24 and 25 so constitutes, and comprises two or more firing units that start because of collision, and (12a 12b) is fixed on one by resin 40 and causes in the ring 13 each firing unit.Furtherly, be installed in one cause in the ring 113 and be stored in each firing unit in the casing (12a, 12b) eccentric a little with respect to the axle of casing.

In the present embodiment, shown in Figure 23-25, igniting element comprises two or more firing units that start because of collision, and (12a 12b) is installed in one by resin 40 and causes in the ring each firing unit.In embodiment illustrated in fig. 26, because firing unit is fixing by resin 40, so set-point firearm retaining element especially.In gas generator shown in the present embodiment, the first firing unit 312a is different with the size of secondary igniter 312b, has different operation output, also can use the firing unit with same operation output.

Embodiment 17

In gas generator shown in Figure 9, two combustion chambers and igniting element supply room are arranged in the casing 3, and casing 3 is formed by connecting by the diffusion shell 1 with gas discharge outlet with the capsul 2 that the diffusion shell forms the storage area.The first combustion chamber 305a is made of the casing 3 and the columnar inner cylindrical element 304 of being essentially of portion that sets within it.Provide the partition 307 that is essentially dull and stereotyped annular inner cylindrical element is further divided into two chambers by the ladder notch portion in inner cylindrical element 304 inboards, the second combustion chamber 305b igniting element supply room 308 is separately positioned on diffusion shell 1 one sides and capsul 2 one sides.Therefore, in this gas generator, the first combustion chamber 305a and the second combustion chamber 305b are arranged in the casing 3 with one heart, and radially adjacent one another are at casing 3.

In the first and

second combustion chamber

305a and 305b, (309a, 309b), the igniting element that gas generant will be started because of collision is lighted, and in igniting element supply room 308, has stored the igniting element that will be started because of collision to have stored gas generant.

Provide a through hole 310 on the inner cylindrical element 304 that limits the first combustion chamber 305a and the second combustion chamber 305b, this through hole is by sealing band 311 sealings.Because when gas generant was lighted, this sealing band broke, two combustion chambers are interconnected by through hole 310.Can regulate the material and the thickness of sealing band 311, allow and have only that sealing band 311 just can break when the gas generant 309b among the second combustion chamber 305b burns.In this embodiment, use the thick corrosion-resistant steel sealing band of 40 μ m.The perforated area of through hole 310 does not have the function of the control second combustion chamber 305b internal pressure greater than the perforated area of gas discharge outlet 26.

Igniting element so constitutes, and firing unit and flame assistant are stored in the igniting element supply room.

By the first firing unit 312a and secondary igniter 312b are set, and centered on, so formed igniting element supply room 308 by the partition that causes ring 313, inner cylindrical element 304 and be essentially dull and stereotyped annular.In addition, shown in the open mode transparent view of Figure 10, the partition 307 that is essentially dull and stereotyped annular by with inner cylindrical element 304 on ladder notch portion 306 ingear stripper loop elements 350 and constitute with stripper loop element 350 ingear seal cup elements 360.

Two electronic ignition

type firing unit

312a and 312b are provided at one in the mode that is parallel to each other to be caused in the ring 313, and exposes its head.Provide firing

unit

312a and 312b by causing in the ring 313 at one in the above described manner, two firing units are fixed in the initiation ring and form an element, therefore are easy to be assembled in the gas generator.Specifically, in gas generator shown in Figure 9, can insert in the inner cylindrical element 304 by making the size that causes ring 313, insert inner cylinder 304 with after fixing initiation ring 313 at initiation ring with two

firing unit

312a and 312b, by being curled in the lower end of inner cylindrical element 304, two firing units can be fixed easily and reliably.Furtherly, when on causing ring 313 two firing units being set, the direction of each firing unit is easy to control.

The stripper loop element 350 that constitutes partition 307 is shaped to and is essentially dull and stereotyped annular, has an aperture portion 351 that the flame assistant supply room 361 of seal cup element 360 inwardly is installed, by digging out the top of the 352 storing spot firearm 312b of annular distance portion that an annular basal surface forms, the second flame transfer hole 319 passes from annular distance portion 352 centers basically.

Seal cup element 360 has one and is columnar flame assistant supply room 361 substantially, it is installed in the aperture portion 351 of stripper loop element 350 to protrude into the second combustion chamber 305b, also has cylindrical shape firing unit receiving port 362, it forms on the position with respect to the annular distance portion 352 of stripper loop element 350, and extends with respect to flame assistant supply room 361 1 sides.

Flame assistant 316a is stored in the flame assistant supply room 361, and secondary igniter 312b inwardly is installed in the firing unit receiving port 362.Be installed in the aperture portion 351 of stripper loop element 350 by the flame assistant supply room 361 with seal cup element 360, stripper loop element 350 and seal cup element 360 are meshing with each other.The top that inwardly is installed to the secondary igniter 312b of firing unit receiving port 362 is projected in the annular distance portion 352 of stripper loop element 350.

As shown in Figure 9, mesh by stripper loop element 350 and seal cup element 360 partition 307 that constitutes and the ladder recess 306 that inner cylindrical element 304 inner periphery surfaces form.Therefore, the periphery of stripper loop element 350 is by 306 supportings of ladder notch portion, and seal cup element 360 contacts supporting with stripper loop element 350.

Furtherly, the periphery of seal cup element 360 and firing unit receiving port 362 be towards same direction bending, and curve 363 is embedded in the groove 364 of inner periphery surface of inner cylindrical element 304.Therefore, stripper loop element 350 is by seal cup element 360 supporting, and prevent casing 3 axially on move.Furtherly, by the curve on the periphery of seal cup element 360 363 being embedded in the groove of inner cylindrical element 304 inner periphery surfaces, partition 307 (being the seal cup element) and inner cylindrical element 304 are meshing with each other.

Therefore, in inner cylindrical element 304, the igniting element supply room 308 of capsul 2 one sides separates reliably with the igniting element hermetically-sealed construction that the second combustion chamber 305b that spreads shell 1 one sides is made of seal cup element 360 and groove 364.

The firing unit that forms on the above-mentioned seal cup element 360 stores mouth 362 and so constitutes, scatter as flabellum in its skirt section, O-shape ring 381 side that sets within it, like this, it and be stored between the secondary igniter 312b that stores in mouthfuls 362, and store mouthfuls 362 and secondary igniter 312b between sealing just realized.

Furtherly, because O-shape ring 381 compresses contact two

firing unit

312a and 312b are fixed to a firing unit retaining element 382 that causes in the ring 313, secondary igniter 312 is arranged on by the firing unit receiving port 362 of the annular opening portion 352 of stripper loop element, seal cup element, O-shape ring 381 and firing unit and installs in 382 spaces that limited.

Therefore, being arranged on the two firing unit 312a and the 312b that cause in the ring 313 is fixed on the firing unit retaining element 382 that is embedded into initiation ring 313 outwardly.Cause in the ring 313 by using 382, two firing unit 312a of above-mentioned firing unit retaining element and 312b to be easy to be assembled into.In addition, in the gas generator shown in this embodiment, the first firing unit 312a forms different sizes with secondary igniter 312b, has different output, in addition, also can use the firing unit with identical output.

Because secondary igniter 312b is activated, the sealing band 320 of the second flame transfer hole 319 in the annular distance portion 352 of sealing stripper loop element 350 breaks, and therefore, the interior volume of Xian Dinging is communicated with the second combustion chamber 305b by this way.The first firing unit 312a and secondary igniter 312b are separated reliably by the hermetically-sealed construction of being made up of skirt section, O-shape ring 381 and the firing unit retaining element 382 of firing unit receiving port 362 (calling the firing unit hermetically-sealed construction in the following text).Therefore, firing unit flame of being activated generation can not flow directly into the space that stores another firing unit.

Be used for purifying and cooling by gas generant (309a, 309b) burning gases of Chan Shenging cooling vessel/filter 22 be arranged in the casing 3, the inner circumferential surface of diffusion shell-side 1 one sides has covered anti-short-circuit component 23, therefore, burning gases can not pass through between the inside face 28 at the end face of cooling vessel/filter 22 and diffusion shell-side 1 top.Expand by producing for suppressing inside face 28 and filter 22 because burning gases etc., at cooling vessel/filter 22 arranged outside skins 24.For example, outer 24 can be formed by wire gauze, can also be formed by the perforated cylinder shape element that many through holes are arranged at all wall surfaces, perhaps by making the ribbon element with preset width be configured as the banded limiting layer formation that annular is obtained.The outside outer 24 forms gap 25, to such an extent as to burning gases can be by the whole surface of filter 22.

Embodiment 18

As firing unit 12a shown in Figure 1 and 12b during, shown in the back view of the gas gas generator of the present invention of Fig. 2, the lead 50a and the 50b of firing

unit

12a and 12b and control unit (not shown) pulled out from the same direction in same plane in same direction alignment.In Fig. 2, lead 50a and 50b are connected on corresponding firing unit 12a and the 12b through corresponding adaptor union 51a and 51b, and adaptor union 51a and 51b are parallel to each other at grade.By forming adaptor union 51a and 51b L shaped, carry the lead 50a of electric signal (actuation signal) and the 50b can be to firing unit from pulling out perpendicular to the axial direction of casing (be casing radially), (in this case, the lead 50a and the interlaced angle of 50b that connect two

firing unit

12a and 12b are 0 degree), at this moment, lead 50a and the 50b that connects the respective point firearm pulls out from same direction.

Embodiment 19

By shown in Figure 8 with firing unit (12a, identical with mode shown in Figure 2 12b) under the situation of aliging on the same direction, the lead 50a and the 50b of firing

unit

12a and 12b and control unit (not shown) pulled out from the same direction in same plane.In Fig. 2, lead 50a and 50b are connected on corresponding firing unit 12a and the 12b through corresponding adaptor union 51a and 51b, and adaptor union 51a and 51b are parallel to each other at grade.By forming adaptor union 51a and 51b L shaped, carry the lead 50a of electric signal (actuation signal) and the 50b can be to firing unit from pulling out perpendicular to the axial direction of casing (be casing radially), at this moment, lead 50a and the 50b that connects the respective point firearm pulls out from same direction.

Embodiment 20

In

firing unit

312a and 312b shown in Figure 7, the same with the back view of embodiment 18 shown in Figure 2, can pull out from lead 50a and the 50b of the same direction in a

plane firing unit

12a and 12b and control unit (not shown).

Lead

50a and 50b are connected on corresponding firing unit 12a and the 12b through corresponding adaptor union 51a and 51b, and adaptor union 51a and 51b are parallel to each other at grade.By forming adaptor union 51a and 51b L shaped, carry the lead 50a of electric signal (actuation signal) and the 50b can be to firing unit from pulling out perpendicular to the axial direction of casing (be casing radially), at this moment, lead 50a and the 50b that connects the respective point firearm pulls out from same direction.

Embodiment 21

In Figure 13, the control unit 202 of gas generator is connected through adaptor union with the lead that firing unit 12 is pulled out by the same direction in the same plane.

Embodiment 22

The spark delay of auto ignition material shown in Figure 12 is definite by factors such as the coefficient of conductivity of the heat-transfer matcrial (for example casing) of the heat of combustion that transmits first gas generant, distances.In this embodiment, use the non-nitrine gas propellant as gas generant, casing and/or inner cylindrical element are equivalent to transmit the at first conductive material of the heat of combustion of the gas generant of burning.Auto ignition material preferably is arranged near the housing of second combustion chamber, further preferably contacts with housing.Auto ignition material can utilize bonded assembly mode to be arranged in second combustion chamber, also can be by auto ignition material being put into independent container, and container is put into modes such as second combustion chamber be provided with.But it is contacted with heat conducting material.

Therefore, in the gas generator that auto ignition material is set in the above described manner, even after gas generator is activated, have only the first gas generant 309a to be lighted, the second gas generant 309b among the second combustion chamber 305b is not lighted, and second gas generant also can be lighted indirectly because of the burning of the first gas generant 309a, therefore, after starting gas generator, carry out from now on processing and discarded etc. under can situation without any trouble.

In Figure 12, reference number 23 expression short-circuit components, it prevents that burning gases from passing through from the end of cooling vessel/filter 22 with spreading between the shell top inner surface.

Claims

1. gas generator that is used for air bag comprises:

The casing that has gas discharge outlet;

Be in the inner cylindrical element in the described casing, its be positioned at casing axially on; This inner cylindrical element defines first combustion chamber in its outside, and also side defines second combustion chamber and igniting element supply chamber within it;

First igniting element is positioned at this igniting element supply chamber, thereby it makes airbag aeration because of gas generator that impact starts only directly to light in described first combustion chamber;

Second igniting element is positioned at this igniting element supply chamber, thereby it optionally makes airbag aeration because of the gas generator that impact starts only directly to light in described second combustion chamber;

Wherein provide the intercommunicating pore that can be interconnected between described first combustion chamber and described second combustion chamber in the casing.

2. the gas generator that is used for air bag of claim 1, wherein the burning gases that produce of first combustion chamber and second combustion chamber pass through gas discharge outlet after by described cooling element.

3. the gas generator that is used for air bag of claim 1, wherein the burning gases green phase that produces of first combustion chamber and second combustion chamber with cooling element.