JP3519564B2 - Gas generator for airbag device and airbag inflation method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air bag device mounted on a vehicle or the like, which protects an occupant by injecting a pressure fluid into an air bag interposed between an occupant and a vehicle interior member to inflate the air bag in the event of a collision. TECHNICAL FIELD The present invention relates to a gas generator for use and an airbag inflation method.

[0002]

2. Description of the Related Art Conventionally, a gas generator for an airbag device has used an inert gas such as compressed nitrogen gas or argon gas as a gas to be used. However, a device using a combustible gas mixture is specially used. It is disclosed in Kaihei 5-278554. This is because the flammable gas mixture contained in the pressure vessel is ignited from one end face side of the pressure vessel and burned, and when the gas pressure increases due to the temperature rise due to the combustion, the other pressure of the pressure vessel is increased by the pressure. The end surface of the is destroyed, and the combustion gas flows from there into the airbag to inflate the airbag.

[0003]

However, in the conventional device disclosed in Japanese Patent Laid-Open No. 5-278554,
In the initial state of igniting the combustible gas mixture, of the gases in the pressure vessel, the gas on the igniter side burns, but the gas on the opposite end face side tends to burn less easily There is a problem that it is difficult to effectively use the gas mixture, or it takes time to increase the pressure in the pressure vessel, resulting in a long initial response time.

Further, in this type of gas generator for an air bag device, it is required that the initial response speed of the air bag is high at the time of its operation, while the completion time of inflation of the air bag depends on the size and shape of the vehicle. It was also necessary to be able to change variously according to the airbag capacity and speed set for each vehicle type due to differences and the like.

Further, in the conventional device disclosed in the above publication, the airbag is inflated by ignition of the gas mixture, and the inflation characteristics of the airbag until the inflation is completed follow the previously designed characteristics. Yes, its characteristics are fixed at the design stage. The inflation characteristic of the airbag is not necessarily uniquely determined by various conditions such as the vehicle speed when the airbag device is operated, the seating position of the occupant, and the difference in the physical constitution of the occupant. It is desired to provide an airbag device that ensures the degree of freedom when operating the airbag device so that the inflation characteristics corresponding to the above can be appropriately realized.

The present invention is to solve such a conventional problem, and its main purpose is to provide a fluid mixture (hereinafter referred to as a fluid mixture) after combustion of a combustible fluid mixture in a gas generator for an airbag device. , Combustion fluid mixture) can be efficiently and quickly sent to the airbag, and the completion time of inflation of the airbag can be variously changed by a simple configuration. In a gas generator for an air bag device, it is to realize an expansion characteristic corresponding to various conditions when the air bag device is operated.

[0007]

In order to achieve the above object, the present invention provides a gas generating device for an air bag device, wherein a first chamber is provided on an end surface of the housing means on the first ventilation opening side, By providing a closing member in the first ventilation opening,
First, the flammable fluid in the first chamber is ignited, and the ignited combustion fluid mixture is introduced into the second chamber to send the combustion fluid mixture to the airbag. By providing a quick start-up of combustion, with a simple configuration, it is possible to quickly send only the combustion fluid mixture to the airbag, and a highly reliable gas generator for the airbag device with a high response speed is realized. can do.

The present invention also relates to a gas generator for an air bag device, wherein when a flammable fluid in the first chamber is ignited and the ignited combustion fluid mixture is introduced into the second chamber, the third ventilation opening is provided. Through this, the outflow direction of the fluid ejected from the first chamber to the second chamber is controlled, and the inflation characteristic time of the airbag can be set variously.

Further, according to the present invention, in a gas generator for an air bag device, a communication state between the first chamber and the second chamber is controlled in accordance with a predetermined condition. The expansion state can be controlled in various ways.

Further, according to the present invention, in the gas generator for the air bag device, the open state is controlled under a predetermined condition, and the inflated state of the air bag can be variously controlled.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention includes a first chamber which contains a flammable fluid and has a first vent opening communicating with an airbag, a flammable fluid and an inert fluid . of
A second chamber that accommodates at least one and is larger than the first chamber, a first closing member that closes the first ventilation opening, an ignition means that ignites a flammable fluid in the first chamber, and the first chamber . Room and
A second ventilation opening communicating with the second chamber; and the second communication
A second closing member for closing the air opening, the first chamber,
It has a third ventilation opening communicating with the second chamber.
(3) Does the ventilation opening have a smaller cross-sectional area than the second ventilation opening?
Alternatively, the length is configured to be long, and by burning at least a part of the combustible fluid in the first chamber, the fluid in the first chamber and the second chamber is discharged through the first ventilation opening,
Inflating the airbag, and inflating the airbag in the first chamber
When the flammable fluid burns, the first chamber forms a closed space.
Ru gas generator der airbag device, characterized in that form. This allows the combustion fluid mixture to be quickly fed into the airbag. Also, in the first room
When the combustible fluid burns, the first chamber forms a closed space
To deliver the combustion fluid mixture into the airbag.
In addition to being able to speed up the loading,
When the flammable fluid in the room is ignited, its combustion fluid mixture
Is introduced into the second room through the third ventilation opening, and has a simple structure
Can burn the flammable fluid in the second chamber, etc.
Has the effect of.

[0012]

The invention according to claim 2 of the present invention is
In the configuration described in 1 , the second closing member is provided outside the first chamber, and the closing portion can be easily attached.

The invention according to claim 3 of the present invention is a claim
In the configuration described in 1 , the second closing member is provided inside the first chamber, and the breaking pressure value of the second closing member can be directional.

According to a fourth aspect of the present invention, in the structure according to the first aspect, the second closing member is more likely to be broken by the pressure from the second chamber side than the first chamber side. The combustion fluid mixture can be quickly fed into the airbag.

[0016]

The invention according to claim 5 of the present invention is
In the configuration described in any one of 1 to 4 , the third ventilation opening is a ventilation opening formed in the side wall of the first chamber, and the second chamber can be burned with a simple configuration.

The invention according to claim 6 of the present invention is
In the configuration described in any one of 1 to 4 , the third ventilation opening is a ventilation opening formed in the second closing member, and can burn the combustible fluid in the second chamber with a simple configuration.

The invention according to claim 7 of the present invention is
In the configuration according to any one of 1 to 4 , the third ventilation opening is a gap formed between the second closing member and the first chamber, and the combustible fluid in the second chamber has a simple configuration. Can be burned.

According to an eighth aspect of the present invention, in the structure according to any one of the first to seventh aspects, the first closing member is destroyed by a pressure increase in the first chamber, The combustion fluid mixture can be immediately delivered to the airbag.

According to a ninth aspect of the present invention, in the structure according to any one of the first to eighth aspects, the second closing member is destroyed by the pressure difference between the first chamber and the second chamber. The combustion fluid mixture in the second chamber can be immediately sent to the airbag.

[0022]

According to a tenth aspect of the present invention, in the structure according to any one of the first to ninth aspects, a plurality of fluid diffusion holes are provided in the radial direction outside the end face provided with the first ventilation opening. It is possible to buffer the inertial force due to the fluid jet from the first ventilation opening.

The invention described in claim 11 of the present invention, in the structure according to any one of claims 1 to 10, at least one of the first chamber and the second chamber, the oxidizing gas or an oxidizing agent A flammable fluid that has a gas and an inert gas and is easy to handle and easily available can be used.

According to a twelfth aspect of the present invention, in the structure according to the first aspect, the third ventilation opening for communicating the first chamber with the second chamber and the third ventilation opening are connected with each other. And a control means for controlling the inflating state of the airbag, which is a gas generating device for an airbag device, which varies the outflow speed of the combustion fluid mixture entering the airbag. be able to.

According to a thirteenth aspect of the present invention, in the configuration according to the twelfth aspect , the control means includes a shutter member that closes the third ventilation opening between the fully opened state and the minimum area. However, in the normal state, while keeping the third ventilation opening fully open, depending on the degree of collision of the vehicle,
When the vehicle collides at high speed, the third ventilation opening is closed to the minimum area, otherwise, the third ventilation opening is operated to have a predetermined area between the fully opened state and the minimum area. A gas generator for an airbag device, which can control the inflation characteristics of the airbag by controlling combustion in the second chamber.

According to a fourteenth aspect of the present invention, in the structure according to the twelfth aspect , the control means is an inertial movement member provided inside the first chamber and movable in the axial direction of the first chamber. When an automobile crashes, the inertial motion member moves in the running direction,
A gas generator for an air bag device, characterized by moving by an inertial force according to a vehicle speed to reduce the volume of the first chamber, and an initial response time can be changed according to a vehicle speed.

According to a fifteenth aspect of the present invention, in the construction according to the fourteenth aspect , the inertial motion member is urged to a position where the volume of the first chamber is maximized inside the first chamber. It was done.

According to a sixteenth aspect of the present invention, in the structure according to the fourteenth or fifteenth aspect , the first chamber is installed inside the second chamber so as to extend in the axial direction of the second chamber. It is a thing.

According to a seventeenth aspect of the present invention, in the structure according to the fourteenth or fifteenth aspects, the first chamber is substantially perpendicular to the axial direction of the second chamber inside the second chamber. It was installed extending in the direction of.

According to an eighteenth aspect of the present invention, in the structure according to any one of the fourteenth to seventeenth aspects, a third ventilation opening is provided in the side wall of the first chamber at a predetermined interval in the longitudinal direction. The inertial motion member is configured to close a predetermined number of third ventilation openings according to the degree of impact.

According to a nineteenth aspect of the present invention, in the structure according to the eighteenth aspect , the inertial motion member maximizes the volume of the first chamber and opens all the third ventilation openings. It was urged by.

According to a twentieth aspect of the present invention, in the structure according to the eighteenth or nineteenth aspect , the third ventilation opening is composed of a slit portion formed to extend in the longitudinal direction of the first chamber. Is.

According to a twenty-first aspect of the present invention, in the configuration according to the first aspect, there is provided a discharging means for discharging the gas body to the outside between the first ventilation opening and the airbag, and further, the predetermined means. And a control means for controlling a communication state between the derivation means and the outside in accordance with the condition of 1., and the control means is a gas generator for an airbag device, which is characterized by controlling an inflated state of the airbag. By releasing a part of the combustion fluid mixture to the outside of the device, it is possible to realize the expansion characteristic corresponding to various conditions during the operation of the airbag device.

According to a twenty-second aspect of the present invention, in the configuration according to the twenty- first aspect, the control means has an outlet and shutter means adjustable between a fully open state and a fully closed state,
The shutter means keeps the outlet in a fully open state in a normal state, and completely closes the outlet when the vehicle collides at a high speed depending on the degree of collision of the vehicle, and otherwise, the outlet is closed. Is a gas generator for an air bag device that adjusts so as to have a predetermined open state between a fully open state and a fully closed state, and can realize inflation characteristics corresponding to various conditions during operation.

The invention according to claim 23 of the present invention is a claim
In the structure according to Item 1, the ignition part of the ignition means is extended to the first chamber, and a convex curved part is provided on an inner wall surface facing the ignition part of the first chamber to accelerate an initial response speed. You can

The invention of claim 24 of the present invention accommodates a combustible fluid, a first chamber having a first ventilation opening leading to the air bag, the least of the combustible fluid and inert fluid
Also accommodates one, a second chamber larger than the first chamber, a first closing member for closing the first ventilation opening, a second ventilation opening for communicating the first chamber and the second chamber, A second closing member for closing the second ventilation opening, a third ventilation opening communicating with the first chamber and the second chamber and having a cross-sectional area smaller than or longer than the second ventilation opening; An ignition means for igniting a combustible fluid in one chamber, and at least a part of the combustible fluid in the first chamber is burned by the ignition means, and the fluid in the second chamber is expanded by the third ventilation opening. And the fluid in the first chamber is discharged from the first ventilation opening, and the fluid in the second chamber is discharged from the first ventilation opening via at least the second ventilation opening to inflate the airbag. This is a gas generator for airbag devices that reduces the initial response time and It can be ignited retardant fluid.

The invention described in claim 25 of the present invention, in the configuration of claim 24, which has a third vent opening is set to the second chamber of the central axis on flammable second chamber The fluid can be burned at a high speed, and the pressure increase in the second chamber can be reduced.

The invention of claim 26 of the present invention, in the configuration of claim 24, wherein is obtained by setting the third vent opening at a position deviated from the central axis of the second chamber, the second chamber The combustion speed of the combustible fluid or the pressure increase in the second chamber can be slightly slowed.

The invention of claim 27 of the present invention, in the configuration of claim 24, wherein is obtained by setting the mouth axes of the third vent opening in parallel with the center axis of the second chamber, the second The burning rate of the combustible fluid in the chamber or the pressure rise in the second chamber can be controlled.

The invention of claim 28 of the present invention has the structure according to claim 24, wherein, to set the mouth axes of the third vent opening in a direction intersecting the central axis of the second chamber, the The burning rate of the combustible fluid in the second chamber or the pressure increase in the second chamber can be controlled to be somewhat delayed.

The invention of claim 29 of the present invention, in the configuration of claim 24, wherein the second chamber is a cylindrical shape,
The mouth axis of the third ventilation opening is set in the circumferential direction of the second chamber so that the burning speed of the combustible fluid in the second chamber or the pressure increase in the second chamber is delayed to some extent. You can control.

According to a thirtieth aspect of the present invention, in the structure according to the twenty- fourth aspect, a plurality of third ventilation openings are provided,
Each of the third vent openings has its mouth axis set in multiple directions in a regular or irregular manner, and the combustion speed of the combustible fluid in the second chamber or the second pressure increase in the chamber can be varied. You can control.

The invention of claim 31 of the present invention, in the structure according to any of claims 24 to 30, the outflow direction of the fluid spewing from the first chamber through the third ventilation opening into the second chamber polarized countercurrent to the flow path deflecting means are those having a can control the pressure rise in the combustion rate or the second chamber of the second chamber of the combustible fluid.

According to a thirty-second aspect of the present invention, in the structure according to the thirty- first aspect, the flow path deflecting means is the first chamber.
When at least one of the protruding portions provided on at least one of the second chamber, the plate member, which is selected from any one of the mesh body, or a metal thin wire, the burning rate of the second chamber of the combustible fluid Alternatively, the pressure increase in the second chamber can be controlled.

The invention of claim 33 of the present invention, in the structure according to any of claims 24 32, the total cross-sectional area of the third ventilation opening, 20 m from 0.10 mm ²
The burn rate of the combustible fluid in the room can be controlled as efficiently as possible because it is set within the range of m ² .

According to a thirty-fourth aspect of the present invention, in the structure according to any one of the twenty-fourth to thirty- third aspects, the length of the third ventilation opening is set within the range of 0.2 mm to 100 mm. Therefore, the combustion speed of the combustible fluid in the room can be controlled as efficiently as possible.

The invention of claim 35 of the present invention, wherein the structure of claim 24 wherein the combustion fluid to cool the combustion fluid mixture introduced from the first chamber through the third ventilation opening into the second chamber It is provided with a mixture cooling means, and can control the burning speed of the combustible fluid in the second chamber or the pressure increase in the second chamber, and can lower the temperature of the combustion fluid mixture.

The invention described in claim 36 of the present invention, in the configuration of claim 35, the combustion gas cooling means is at least one collision provided on at least one of the first chamber and the second chamber One of a piece, a plate, a mesh, or a fine metal wire, which controls the burning speed of the combustible fluid in the second chamber or the pressure increase in the second chamber, and a combustion fluid mixture. The temperature of can be effectively lowered.

According to a thirty-seventh aspect of the present invention, in the structure according to any one of the twenty-fourth to thirty- sixth aspects, the second ventilation opening is opened after a predetermined time has elapsed after the operation of the ignition means. It is a gas generator for an airbag device set to, and a gas body can be quickly introduced into the airbag.

The invention of claim 38 of the present invention, in the configuration of claim 37, wherein, the second closing member, which pressure in the first chamber is broken when it reaches a predetermined value,
Achieves quick rising fluid introduction into the airbag.

According to a thirty-ninth aspect of the present invention, in the structure according to the thirty-seventh aspect , the second closing member is mechanically broken, and a fluid having a fast rising speed is introduced into the airbag. To do.

The invention as set forth in claim 40 of the present invention has a first chamber having a first ventilation opening, and a second chamber having at least one second and third ventilation opening, respectively. A portion of the combustion products produced in the first chamber is introduced into the second chamber through the third vent opening, and the combustion products produced in the second chamber are passed through the third vent opening to the second vent opening. The combustion product introduced into the first chamber and produced in the first chamber and the second chamber is a gas generating device for an airbag device which is discharged from the first ventilation opening, and has a simple structure to form the two chambers. The combustible fluid contained in the air can be burned and introduced into the airbag.

[0054]

[0055]

(Embodiment 1) Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the configuration of an airbag device according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes the entire airbag device.
Reference numeral 2 denotes a module case in the shape of a square cylinder with a bottom, which constitutes the outer shell of the airbag device 1. The module case 2 has an air bag 3 attached thereto and a plurality of fluid supply holes 4. The airbag 3 is normally folded. The gas generator 100 for an airbag device is inserted in the module case 2 so as to seal the module case 2. Gas generator 100 for airbag device
Has a second chamber 5 forming a pressure vessel containing a combustible fluid mixture 7. The one end 5a of the second chamber 5 has a fluid filling port 6 for filling the combustible fluid mixture 7, and the fluid filling port 6 is sealed after the fluid filling. Reference numeral 8 is a first ventilation opening formed in the other end portion 5b of the second chamber 5. Reference numeral 9 denotes a first chamber which is attached to the inside of the other end 5b of the second chamber 5 by welding, screws or the like so as to surround the first ventilation opening 8. The first chamber 9 and the second chamber 5 have a partition wall 9a.
It is divided by. The partition wall 9 a has a second ventilation opening 11 and at least one third ventilation opening 10 which are closed by a second closing member 12. 13 is the first ventilation opening 8
Is a first closing member that closes up. Reference numeral 14 is an igniter, and an igniter 14a is provided in the first chamber 9. In addition, in the present embodiment, the igniter 14 and the first closing member 13 may be separate bodies. The breaking pressure of the first closing member 13 is set so as to break when the volume ratio of the combustion fluid mixture in the first chamber 9 reaches at least one half. The igniter 14 ignites the combustible fluid mixture in the first chamber 9 by a signal from an impact sensor or a deceleration sensor (not shown). Reference numeral 15 is a diffuser mounted outside the other end 5b of the second chamber 5 so as to surround the first ventilation opening 8 and has a plurality of fluid diffusion holes 16 in the radial direction. Here, the means for igniting the combustible fluid mixture 7 in the first chamber 9 may be a squib.

As the combustible fluid mixture 7, a mixture containing an inert fluid, a combustible fluid and an oxidant fluid is used.
The inert fluid is preferably nitrogen or argon, helium or mixtures thereof. The flammable fluid may be hydrogen or lower hydrocarbons, lower alcohols, lower ethers or mixtures thereof. The oxidizing fluid is preferably oxygen. Air may be used as a mixture of the inert fluid and the oxidizing fluid. As the combustible fluid mixture 7, it is also possible to use a mixed fluid which does not contain an inert fluid, has a small amount of combustible fluid, and has an oxidizing fluid amount sufficiently larger than the amount required to burn the combustible fluid. Further, the combustible fluid mixture 7 may have a composition such that the combustible fluid falls within the combustion range immediately before or at the same time as the ignition of the combustible fluid.
In this case, the oxidant fluid or a mixture of the oxidant fluid and the inert fluid is mixed with the flammable fluid immediately before or at the same time as the ignition of the flammable fluid.

Further, the combustible fluid mixture 7 may be a gas mixture or a liquid mixture. In addition,
In the embodiment of the present invention, the example in which the combustible fluid mixture is contained in both of the two chambers is shown, but the chamber which does not ignite is not necessarily the combustible fluid mixture. In this case, a fluid mixture containing no combustible fluid or containing a combustible fluid but having a concentration below the combustion limit is contained. In this case, a blocking member is also provided in the third ventilation opening to prevent the fluid in each chamber from mixing. As a means for breaking the closing member provided in the third ventilation opening, a known means such as a mechanical breaking means such as a piston or a means for breaking due to a pressure difference can be used.

Next, the operation of the first embodiment will be described. In each of the following drawings, parts denoted by the same reference numerals indicate the same constituent elements. When the vehicle rapidly decelerates due to a collision or the like, the igniter 14 ignites the combustible fluid mixture 7 in the first chamber 9 by a signal from the impact sensor or the deceleration sensor. As a result, the combustible fluid mixture 7 in the first chamber 9 burns, the heat generated by the combustion raises the temperature of the fluid, and the pressure in the first chamber 9 increases. When the volume ratio of the combustion fluid mixture in the first chamber 9 reaches at least one-half, the fragile portion of the first closing member 13 is destroyed and the combustion fluid mixture is removed from the inside of the first chamber 9. It is introduced into the airbag 3 through the first ventilation opening 8, the diffuser 15, and the module case 2. Here, the combustion fluid mixture is a fluid mixture generated by burning the combustible fluid mixture 7.

Meanwhile, at least a part of the combustion fluid mixture in the first chamber 9 is introduced into the second chamber 5 through the third ventilation opening 10, and the combustible fluid mixture in the second chamber is introduced. Start burning of 7. On the other hand, the combustion fluid mixture flows out due to the breakage of the first closing member 13, so that the pressure in the first chamber 9 sharply decreases. Therefore, the pressure difference between the second chamber 5 and the first chamber 9 becomes large. When the pressure difference reaches a predetermined value, the second
The fragile part of the blocking member 12 is destroyed. As a result, the combustion fluid mixture in the second chamber 5 is introduced into the airbag 3 through the second ventilation opening 11, the first chamber 9, the first ventilation opening 8, the diffuser 15 and the module case 2. It The pressure of the second chamber 5 is temporarily reduced by the outflow of the combustion fluid mixture from the second ventilation opening 11. However, since the unburned combustible fluid in the second chamber 5 continues to burn, the unburned combustible fluid in the second chamber burns out while keeping the pressure in balance or slightly rising. The combustion fluid mixture mixture is supplied to the airbag 3.

However, when it is desired to accelerate the combustion in the second chamber 5, the second closing member 12 is broken even if the pressure in the first chamber 9 is higher than the pressure in the second chamber 5. Good. That is,
Before the destruction of the first closing member 13 or simultaneously, the second closing member 1
It destroys 2. The second closing member 12 includes the first,
The pressure may be destroyed by utilizing the pressure difference between the second chambers, or may be mechanically destroyed by receiving a signal from an external sensor (not shown).

FIG. 2 shows a temporal change in pressure increase in the first chamber 9 and the second chamber 5 in the first embodiment. However, in this figure, the first closing member 13 and the second closing member 12 are set so as not to be destroyed together, and the volume of the first chamber 9 is set to approximately 1/10 of the volume of the second chamber 5. And evaluated in an independent state. As is clear from the comparison between points P and Q in this figure, the time required to reach the predetermined burst pressure is faster (tQ-tP) in the first chamber 5 having the smaller volume than in the second chamber 9. I understand.

FIG. 3 shows the first chamber 9 in the above embodiment.
9 shows a modification of the second closing member 12. The second closing member 120 is joined (not shown) to the partition wall 90a on the first chamber 90 side of the partition wall 90a of the first chamber 90 and at the end thereof. Further, the second ventilation opening 110 of the partition wall 90a is composed of a plurality of small-diameter openings. That is, the first chamber 90
When the pressure inside is higher than the pressure inside the second chamber 5, the pressure is applied to the second ventilation opening 110 having a small diameter, so that the second closing member 120 can set the breaking pressure high. On the contrary, when the pressure in the second chamber 5 is higher, the pressure is received by the opening having a large diameter, so that the breaking pressure of the second closing member 120 can be set low. Other configurations are the same as those in FIG. In FIG. 3, when the combustible fluid mixture 7 is ignited by the igniter 14, the pressure in the first chamber 90 increases. At this time, since the second closing member 120 receives pressure from the second ventilation opening 110 having a small diameter, the second closing member 120 is broken by the pressure in the second chamber relatively lower than the pressure in the first chamber 90. It will not be done. On the other hand, when the first closing member 13 is broken due to the increase in the pressure inside the first chamber 90, the pressure inside the first chamber 90 sharply decreases. Therefore, the second closing member 120 receives pressure with a diameter larger than that of the second ventilation opening 110, so that the second closing member 120 is easily broken. Thus, FIG.
With the configuration shown in FIG. 2, the second closing member 120 can be broken at the same time as or immediately after the first closing member 13 is broken, and the combustion fluid mixture in the second chamber 5 can be quickly converted into an airbag. Can be introduced.

FIG. 4 shows the first chamber 9 in the above embodiment.
And another modification of the second closing member 12 is shown. In FIG. 4, the second ventilation opening 111 provided in the partition wall 91a includes an opening portion 111a having a small outer diameter and a spherical portion 111 having a larger inner diameter and formed into a spherical shape.
It is divided into b. The second closing member 120 is joined so as to cover the spherical surface portion 111b. Other configurations are the same as those in FIG. In FIG. 4, when the combustible fluid mixture 7 is ignited by the igniter 14, the pressure in the first chamber 91 increases. At this time, the second closing member 120 is separated from the partition wall 91a.
The spherical portion 111b is pressed. Therefore, since the pressure of the second closing member 120 is received by the opening 111a, the second closing member 120 is not destroyed.
On the other hand, when the first closing member 13 is destroyed due to the increase in the pressure inside the first chamber 91, the pressure inside the first chamber 91 suddenly decreases. Therefore, the pressure in the second chamber 5 is relatively increased, and the second closing member 120 increases the pressure in the spherical portion 1 having a large diameter.
Since it is received by 11b, the second closing member 120 is easily broken. As described above, according to the configuration shown in FIG. 4, the second closing member 120 can be broken at the same time as or immediately after the first closing member 13 is broken, and the combustion fluid mixing in the second chamber 5 can be performed. The body can be quickly introduced into the airbag.

FIG. 5 shows the first chamber 9 in the above embodiment.
And another modification of the second closing member 12 is shown. The second closing member 121 joined so as to close the second ventilation opening 11 has an opening 121a having a small diameter formed at the center thereof. Other configurations are the same as those in FIG. In the configuration of FIG. 5, instead of the third ventilation opening 10 of FIG.
A small diameter opening 121 formed in the second closing member 121.
It acts and has the same effect as in FIG. 1, except that a is fulfilled.

As another method, instead of joining the entire circumference of the second closing member 121 to the partition wall 92a, a gap is provided without joining at least a part thereof, and this gap is provided in the third ventilation opening 10
May be used instead of.

In the first embodiment, the combustion speed is increased by igniting in the first chamber, which is a substantially closed space smaller than the second chamber, so that the first closing member is quickly destroyed and the initial Although the response speed is short, the initial response speed can be further increased by providing a convex portion on the inner wall surface near the ignition portion in the first chamber.

(Second Embodiment) Next, a second embodiment of the present invention will be described. FIG. 6 shows the configuration of a gas generator for an airbag device according to the second embodiment of the present invention. The present embodiment is different from the first embodiment in that the first chamber 94 is formed in an elongated cylindrical shape in which the end of the second chamber 5 opposite to the first ventilation opening 8 is opened. Not having the second closing member, and the first closing member 13
Is joined to the outside of the first ventilation opening 8.
The other configuration is the same as that of the first embodiment shown in FIG. 1, and the same components are designated by the same reference numerals.

In FIG. 6, when the combustible fluid mixture 7 in the first chamber 94 is ignited by the igniter 14 and burned, the combustion fluid mixture in the first chamber 94 becomes the first at its open end. The flammable fluid mixture 7 in the second chamber 5 is ignited. On the other hand, the pressure increase in the first chamber 94 increases the pressure of the first closing member 1.
3 is destroyed so that the combustion fluid mixture in the first chamber 94 and subsequently the combustion fluid mixture in the second chamber 5 passes from the first ventilation opening 8 through the fluid diffusion hole 16 of the diffuser 15 to the airbag. Will be introduced to.

As described above, according to the second embodiment, the first chamber 94 is formed in the elongated cylindrical shape, so that the first chamber 94 does not have the second closing member, and the first chamber 94 does not have the second closing member. The same effect as that of the first chamber 9 can be obtained.

In the second embodiment described above,
By appropriately setting the length and diameter of the first chamber 94, the timing of breaking the first closing member 13 and the timing of introducing the combustion fluid mixture into the second chamber 5 can be changed.

Further, in the first and second embodiments, it is preferable to provide means for confining the destroyed first closing member 13 or means for fixing the destroyed first closing member 13.

Next, third to ninth embodiments of the present invention will be described with reference to FIGS. These embodiments are provided with a structure for variously controlling the inflation characteristics of the airbag. In the following description of each embodiment, the configuration in the first embodiment is the basic, and the same parts and members are designated by the same reference numerals.

(Third Embodiment) FIG. 7 shows the structure of an airbag device according to a third embodiment of the present invention.
In FIG. 7, reference numeral 20 indicates the entire airbag device.
Reference numeral 2 denotes a module case that forms an outer shell of the airbag device 20. The module case 2 has an air bag 3 attached thereto and a plurality of fluid supply holes 4. 10
Reference numeral 0 is a gas generator for an airbag device. Reference numeral 5 is a second chamber having a cylindrical shape. The second chamber 5 has a central axis C,
It has a long axis L and a short axis S. Reference numeral 6 denotes a fluid filling port for filling the gas generating apparatus 100 for an airbag device with the combustible fluid mixture 7, which is sealed after filling. Reference numeral 8 is a first ventilation opening, and 9 is a first chamber provided on the opposite side of the second chamber 5 from the fluid filling port 6. Further, 11 is a second ventilation opening, 12
Is a second closing member attached to the partition wall 9a so as to close the second ventilation opening 11. A first closing member 13 closes the first ventilation opening 8 and is integrated with the igniter 14. Reference numeral 14a is an ignition portion of the igniter 14 provided in the first chamber 9. In the present embodiment, the igniter 1
4 and the first closing member 13 may be separate bodies. The means for igniting the combustible mixture 7 in the first chamber 9 may be a squib.

In the third embodiment, the second closing member 1
The center of 2 coincides with the central axis C of the second chamber 5, and one third ventilation opening 22 is provided therein.

Here, the second closing member 12 is destroyed by the pressure difference between the first chamber 9 and the second chamber 5 at the same time as the opening of the first closing member 13 or thereafter. Alternatively, the piston may be mechanically opened after a predetermined time has elapsed. It is to be noted that only the third ventilation opening 22 communicates the first chamber 9 and the second chamber 5 until a predetermined time has elapsed. In the combustion of the combustible fluid mixture 7 in the first chamber 9, the first chamber 9 substantially forms a closed space. Therefore, the initial response time of this device is not delayed. 4th to 1st illustrated below
The same applies to each of the embodiments up to 4.

The third ventilation opening 22 has a smaller cross-sectional area and / or a longer length than the second ventilation opening 11. When the third ventilation opening 22 is composed of a plurality of pieces, it is preferable that the total cross-sectional area thereof is smaller than the cross-sectional area of the second ventilation opening 11.

The cross-sectional area of the third ventilation opening 22 is 0.10 to 0.10.
It is desirable to set 20 mm ² and the length within the range of 0.2 to 100 mm. If the cross-sectional area of the third ventilation opening 22 is smaller than these numerical values and the length is long, the first chamber 9
It becomes difficult to introduce the combustion fluid mixture generated in step 2 into the second chamber 5. On the contrary, if the cross-sectional area is larger and the length is shorter than these numerical values, when the pressure in the first chamber 9 rises due to the operation of this device, the gas is ejected from the first chamber 9 to the second chamber 5. Too much combustion fluid mixture. This is not preferable because the pressure in the first chamber 9 will not rise. The combination of the cross-sectional area and the length of the third ventilation opening 22 is preferably long when the cross-sectional area is large and short when the cross-sectional area is small.

In such a structure, when the vehicle is rapidly decelerated due to a collision or the like, the igniter 14 ignites the combustible gas mixture 7 in the first chamber 9 by a signal from an impact sensor or deceleration sensor (not shown). The heat generated by the combustion of the combustible fluid mixture 7 increases the pressure in the first chamber 9 and destroys the first closing member 13. Then, the combustion fluid mixture is introduced into the airbag 3 from the first ventilation opening 8 through the diffuser 15 and the module case 2.

On the other hand, at least a part of the combustion fluid mixture in the first chamber 9 passes from the third ventilation opening 22 provided on the central axis C and the major axis L of the second chamber 5 to the second ventilation opening 22. Room 5
It is introduced into the inside along the central axis and the major axis direction. The introduced combustion fluid mixture ignites the combustible fluid mixture 7 in the second chamber 5. In the present embodiment, the combustion fluid mixture spreads quickly and efficiently in the second chamber 5, so that the combustible mixed fluid 7 in the second chamber 5 can be burned quickly. Therefore, the inflation completion time of the airbag can be set short.

Here, if the mouth axis of the third ventilation opening 22 is provided parallel to the central axis direction C of the second chamber 5, it does not necessarily have to be located on the central axis. In this case,
Compared with the case where the third ventilation opening 22 is on the central axis of the second chamber 5, the discharge of the combustion fluid mixture into the second chamber 5 is suppressed, so that the flammability of the second chamber 5 side is increased. The mixed fluid 7 can be burned slowly. Therefore, in this case, the inflation completion time of the airbag 3 can be set to be relatively long.

(Fourth Embodiment) FIG. 8 shows the structure of an airbag device according to a fourth embodiment of the present invention.
The same components as those in the third embodiment are designated by the same reference numerals. 25
Is an airbag device according to the present embodiment.

In this embodiment, a plurality of third ventilation openings 26 are provided by mechanical perforation on the entire wall surface around the second ventilation opening 11 of the partition wall 9a. In addition, this partition 9a
It is also possible to provide a large number of third ventilation openings according to the present exemplary embodiment by configuring at least a part of the porous material such as a sintered metal. The third ventilation opening may be provided not only on the partition wall 9a but also on the second closing member 12.

In such a structure, when the vehicle is decelerated rapidly due to a collision or the like, as shown in the third embodiment,
The combustion fluid mixture is introduced into the airbag 3 from the first chamber 9.

On the other hand, at least a part of the combustion fluid mixture in the first chamber 9 is jetted in a direction intersecting with the central axis C of the second chamber 5 through the large number of third ventilation openings 26.
This combustion fluid mixture initiates the combustion of the combustible fluid mixture 7 in the second chamber 5. In the present embodiment, since the spread of the combustion fluid mixture in the central axis direction C is suppressed, the combustible mixed fluid 7 on the second chamber 5 side can be burned slowly. Therefore, in this case, the airbag 3
The expansion completion time can be set longer.

(Fifth Embodiment) FIG. 9 shows the structure of an airbag device according to a fifth embodiment of the present invention.
The same components as those in the third embodiment are designated by the same reference numerals. 27
Is an airbag device according to the present embodiment.

In this embodiment, as shown in FIG. 10, the third ventilation openings 28 are arranged at equal intervals at three locations on the partition wall 9a.
Is provided with three vent pipes 28a with their tip openings 28b oriented in the circumferential direction.

In such a structure, when the vehicle is rapidly decelerated due to a collision or the like, the combustion fluid mixture is introduced into the airbag 3 from the first chamber 9 as shown in the third embodiment.

On the other hand, at least part of the combustion fluid mixture in the first chamber 9 is introduced into the second chamber 5 via the third ventilation opening 28. At this time, the second chamber 5 has a cylindrical shape, and the combustion fluid mixture is introduced in the circumferential direction. In this embodiment, since the spread of the combustion fluid mixture in the central axis direction is suppressed, the combustible mixture fluid 7 on the second chamber side can be burned slowly. Therefore, in this case, the inflation completion time of the airbag can be set longer.

In this embodiment, as the third ventilation opening 28, the air guide tube 28 whose tip opening 28b is oriented in the circumferential direction.
Although “a” is provided, it may not be provided and the mouth axis of the third ventilation opening may be set so as to eject the combustion fluid mixture in the circumferential direction. Further, the third ventilation openings 28 are not limited to three locations, and any number can be provided.

(Sixth Embodiment) FIG. 11 shows the structure of an airbag device according to a sixth embodiment of the present invention. The same components as those in the third embodiment are designated by the same reference numerals.
Reference numeral 31 is an airbag device according to the present embodiment.

In this embodiment, the partition wall 9a has the ventilation opening 11 on the major axis L and the central axis C of the second chamber 5. A third ventilation opening 22 is provided at the center of the second closing member 12 that closes the ventilation opening 11. Here, the flow path deflecting means 33 is arranged on the second chamber 5 side of the third ventilation opening 22. As shown in FIG. 12, the flow path deflecting means 33 is composed of a circular metal plate 331 having a diameter smaller than that of the ventilation opening 11 and three leg members 332 arranged on one surface thereof. Each leg member 332 tapers outwardly,
The end side thereof is further bent outward in parallel with the circular metal plate 331. These leg members 332 are joined across the second closing member 12 at the partition wall 9a.

In such a structure, when the vehicle rapidly decelerates due to a collision or the like, the combustion fluid mixture is introduced into the airbag 3 from the first chamber 9 as shown in the third embodiment.

On the other hand, at least part of the combustion fluid mixture in the first chamber 9 passes through the third ventilation opening 22 on the central axis C and the major axis L of the second chamber 5 to the second Introduced into chamber 5. The combustion fluid mixture is ejected toward the central axis and the long axis of the second chamber 5. Here, the flow path is deflected by colliding with the circular metal plate 331 of the flow path deflecting means 33. That is,
It is guided in the direction of the short axis S of the second chamber 5. In the present embodiment, since the spread of the combustion fluid mixture is suppressed, the combustible mixture fluid 7 on the second chamber 5 side can be burned slowly. Therefore, in this case, the inflation completion time of the airbag 3 can be set longer.

(Seventh Embodiment) FIG. 13 shows the structure of an airbag device according to a seventh embodiment of the present invention. The same components as those in the third embodiment are designated by the same reference numerals.
Reference numeral 40 denotes the airbag device according to the present embodiment.

The center of the second closing member 12 coincides with the central axis C and the long axis L of the second chamber 5, and the third ventilation opening 22 is provided therein. The flow path deflecting means 36 is arranged on the second chamber 5 side of the third ventilation opening 22. As shown in FIG. 14, the flow path deflecting means 36 includes a ring member 361, a circular member 362, and an arm portion 363. The ring member 361 has substantially the same diameter as the minor axis direction of the second chamber 5.
The circular member 362 is connected to the center of the ring member 361 by four arm portions 363. Flow path deflecting means 36
Is placed and joined in front of the top wall of the first chamber, and the circular portion 36
2 is arranged to face the third ventilation opening 22. The circular member 362 is preferably smaller than the second ventilation opening 11.

In such a structure, when the vehicle rapidly decelerates due to a collision or the like, the combustion fluid mixture in the first chamber 9 is introduced into the airbag 3 as shown in the third embodiment.

On the other hand, at least a part of the combustion fluid mixture in the first chamber 9 passes through the third ventilation opening 22 on the central axis C and the long axis L of the second chamber 5 and then into the second chamber. 5 is introduced. The combustion fluid mixture is ejected toward the central axis direction of the second chamber 5. Here, the circular portion 36 of the flow path deflecting means 36
2 and the flow path is deflected. That is, the second chamber 5
Is guided in the direction of the short axis of. In the present embodiment, since the spread of the combustion fluid mixture is suppressed,
The combustible mixed fluid 7 on the second chamber side can be burned slowly. Therefore, in this case, the inflation completion time of the airbag 3 can be set longer.

(Embodiment 8) FIG. 15 shows the structure of an airbag device according to an eighth embodiment of the present invention. The same components as those in the third embodiment are designated by the same reference numerals.
Reference numeral 50 is an airbag device according to the present embodiment.

In this embodiment, in the second chamber 5,
A plurality of partition plates 52 functioning as flow path deflecting means are installed at regular intervals in the major axis direction of the second chamber 5.
The partition plate 52 connects the second chamber 5 to a plurality of combustion blocks b1, b.
It is divided into 2, b3, b4, and b5. A communication hole 53 for communicating the plurality of combustion blocks b1 to b5 is formed in each of the partition plates 52. The communication hole 53 is
Each partition plate 52 is formed at a predetermined position deviated from the center position of the partition plate 52 in the peripheral direction, and the communication holes 53 provided in the plurality of partition plates 52 are adjacent to each other. It is installed so as to take a mutually offset position (that is, to be in an offset state).

In such a structure, when the vehicle rapidly decelerates due to a collision or the like, the combustion fluid mixture is introduced into the airbag 3 from the first chamber 9 as shown in the third embodiment.

On the other hand, at least part of the combustion fluid mixture is introduced into the second chamber 5 via the third ventilation opening 22. The combustion fluid mixture ignites the combustible fluid mixture 7 in the second chamber 5. In this case, the second chamber 5 is divided into a plurality of combustion blocks b1 to b5 by a plurality of partition plates 52, and further, from the combustion blocks b1 to b5 by the communication holes 53 formed in the partition plate 52.
Are connected in a meandering state. Therefore, the flow channel in the second chamber 5 is deflected, and the flow channel of the fluid in the second chamber 5 is substantially lengthened. As a result, it takes longer to burn the combustible fluid mixture 7 in the second chamber 5. Further, the partition plate 52 can also serve as a combustion fluid mixture cooling member that deprives the heat of the high temperature combustion fluid mixture ejected from the first chamber 9 to the second chamber 5.

In this embodiment, at least two communication holes 53 may be arranged on the same straight line. Further, all the communication holes 53 may be arranged on the same line. Further, the communication holes 53 arranged on the same straight line may be arranged on the central axis of the second chamber 5. In these cases, the second chamber 5 in this order
The time taken to burn the combustible fluid mixture therein can be reduced. Further, at least one partition plate 52 may have a plurality of communication holes 53.

(Ninth Embodiment) FIG. 16 shows the structure of an airbag device according to a ninth embodiment of the present invention. The same components as those in the third embodiment are designated by the same reference numerals.
Reference numeral 65 is an airbag device according to the present embodiment.

In this embodiment, a cap body (or dome body) 66 formed of a metal mesh is provided in the first chamber 9 at the portion extending from the tip of the first chamber 9 to the inside of the second chamber 5. It is attached in a state of being worn on. The cap body 66 is attached to the first chamber 9 by welding or the like.

In such a structure, when the vehicle rapidly decelerates due to a collision or the like, the combustion fluid mixture is introduced into the airbag 3 from the first chamber 9 as shown in the third embodiment.

On the other hand, at least part of the combustion fluid mixture is introduced into the second chamber 5 through the third ventilation opening 22 formed in the second closing member 12. The combustion fluid mixture ignites the combustible fluid mixture 7 in the second chamber 5.
In this case, the following two steps will be performed.
First, in the inside of the second chamber, since the cap body 66 is attached to the outlet of the first chamber 9 on the side of the second chamber 5, once inside the cap body 66, the flammable fluid mixture 7 Is burned. Then, the combustible fluid mixture 7 in the entire second chamber 9 is burned. Therefore, the combustion speed of the combustible fluid mixture 7 in the second chamber 5 can be reduced by an appropriate ratio, and the combustion time can be prolonged appropriately. Further, the cap body 66 can also serve as a combustion fluid mixture cooling member that removes heat of the high temperature combustion fluid mixture ejected from the first chamber 9 to the second chamber 5.

In the present embodiment, the cap body 66 may be a thin metal wire. It is desirable to use a thin metal wire that does not burn and has a wire diameter. The thin metal wire may be loaded only in the vicinity of the first chamber 9 or the third ventilation opening 22, or may be loaded in the second chamber 5 so as to have a uniform or arbitrary density gradient. Good.

In each of the above-described sixth and subsequent embodiments, the flow path deflecting member and the combustion fluid mixture cooling member may be used as a combination of the respective embodiments, and the installation location is also Either one of the first chamber 9 and the second chamber 5 may be provided, or both may be provided.

Further, as the combustion fluid mixture cooling member,
A substance that absorbs latent heat, such as a phase change or an endothermic agent, may be disposed on the inner surfaces of the first chamber 9 and the second chamber 5. Examples of these include calcium hydroxide, magnesium hydroxide, hydrates of sodium carbonate, and the like. These substances absorb heat from the hot combustion fluid mixture and generate gas, which serves to lower the temperature of the combustion fluid mixture. Other means for lowering the temperature of the combustion fluid mixture include a filter made of a metal mesh, the module case 2 and the diffuser 15, and a heat absorbing substance may be added to these.

Next, the tenth to thirteenth embodiments of the present invention will be described with reference to FIGS. 17 to 23. These embodiments correspond to various conditions such as the vehicle speed at the time of operating the airbag device, or the seating position of the occupant and individual differences in physique.
Means for controlling the inflation state of the airbag are provided.

(Tenth Embodiment) FIGS. 17 and 18 show the structure of a gas generator for an air bag device according to a tenth embodiment of the present invention. The gas generator is arranged such that its major axis direction is perpendicular to the traveling direction of the automobile. In FIG. 17, reference numeral 155 denotes a gas generator, which has a first chamber 155A having a small volume,
And a second chamber 155B having a large volume. 151
Reference numeral 5 is a diffuser having a plurality of fluid ejection ports 1516.

The first chamber 155A has a first ventilation opening 101, and a first closing member 102 integrally provided with an igniter 103 is attached and closed there. Igniter 103
The ignition part 103a is provided in the first chamber 155A. The igniter 103 ignites the combustible fluid mixture in the first chamber 155A by a signal from an ignition circuit (not shown). The igniter 103 and the first closing member 10
2 may be a separate body.

A partition 104 separates the first chamber 155A and the second chamber 155B. The partition 104 is provided with a second ventilation opening 105 in the center thereof.
106 is a third vent opening for introducing the combustion fluid mixture into the second chamber 155B. The second ventilation opening 105 is closed by the second closing member 107 on the first chamber 105A side. The third ventilation opening 106 can be opened and closed by a shutter member 108 that constitutes an inertial moving body on the second chamber 155B side.

Here, as shown in FIG. 18, the shutter member 108 is made up of a substantially V-shaped member, one end of which is pivotally supported by the partition wall 104 via a rotary pin 126, and the rotary pin 126 is rotated. It is rotatably mounted as a center. Note that the shutter member 108 is not limited to the dogleg shape, and can have various shapes as long as it has a similar mechanism. In addition, in the partition wall 104, as shown in FIG.
Stopper pins 127 and 128 are attached. These stopper pins 127 and 128 regulate the operation range of the shutter member 108. That is, as shown in FIG. 18, the shutter member 108 is displaced in a direction in which one side edge central portion of the shutter member 108 is brought into contact with the first stopper pin 127 to fully open the third ventilation opening 106 and to close the third ventilation opening 106. To do. Note that when the third ventilation opening 106 is completely closed, the combustion fluid mixture mixture is removed from the second chamber 15
It becomes impossible to introduce to 5B. Therefore, the shutter member 10
2 so that 8 does not completely block the third vent opening 106
The minimum opening area is secured by using the stopper pin 128 of. Further, as shown in FIG. 18, a leaf spring fixing pin 129 is attached to the partition wall 104. A leaf spring 130 is interposed between the leaf spring fixing pin 129 and the shutter member 108, and the shutter member 108 is normally pressed against the first stopper pin 127 to fully open the third ventilation opening 106. keeping. In order to prevent the shutter member 108 from rattling in the left-right direction, the pins 127, 128, and 129 are attached to the shutter member 1.
A ring-shaped shutter pressing plate 131 is attached with a gap provided so as not to hinder the movement of 08.

Next, the operation of the tenth embodiment will be described with reference to FIG. When a vehicle collides, an inertial force corresponding to the traveling speed is generated in the shutter member 108 in the traveling direction. This causes the shutter member 108 to rotate the rotary pin 1.
It is displaced in a direction in which the opening area of the third ventilation opening 106 is reduced (direction of arrow A in the figure) with 26 as a pivot.

On the other hand, almost at the same time, the igniter 103 causes the first chamber 15 to move in response to a signal from an ignition circuit not shown.
Ignite 5A flammable fluid mixture. Due to the heat generated by the combustion, the pressure in the first chamber 155A rapidly increases, and the first closing member 102 is destroyed. Then, the combustion fluid mixture in the first chamber 155A is introduced into the airbag (not shown) through the first ventilation opening 101 and the diffuser 1515.

On the other hand, at least a part of the combustion fluid mixture mixture formed in the first chamber 155A passes through the third ventilation opening 106 narrowed by the shutter member 108 and is introduced into the second chamber 155B. It The combustion fluid mixture ignites the combustible fluid mixture in the second chamber 155B. When the second closing member 107 is destroyed by the pressure difference generated between the first chamber 155A and the second chamber 155B, the second chamber 15
The combustion fluid mixture in 5B is introduced into the airbag through the second ventilation opening 105, the first ventilation opening 101, the diffuser 1515.

As described above, in the tenth embodiment, the shutter member 108 controls the opening area of the third ventilation opening 106 according to the collision speed of the automobile, and the first chamber 155 is controlled.
By changing the boosting speed of A, the inflation state of the airbag is controlled. Therefore, the airbag can be inflated and deployed according to the collision speed.

(Embodiment 11) FIG. 19 shows the first embodiment of the present invention.
1 shows a configuration of a gas generator for an airbag device according to the first embodiment. The gas generator is arranged such that its major axis direction is parallel to the traveling direction of the automobile. In FIG. 19, reference numeral 165 denotes a gas generator, which includes a first chamber 165A having a small volume and a second chamber 165B having a large volume. Reference numeral 1615 is a diffuser having a plurality of fluid ejection ports 1616.

The first chamber 165A has a first ventilation opening 211.
And a first closing member 212 integrally provided with an igniter 213 is attached and closed. The igniter 213 inserted through the first ventilation opening 211 has the ignition part 21.
3a is located in the first chamber 165A. Igniter 2
13 ignites the combustible fluid mixture in the first chamber 165A in response to a signal from the ignition circuit 1624.

A fourth ventilation opening 214 is formed in the bottom wall of the first chamber 165A arranged in the second chamber 165. A partition member 216, which constitutes an inertial motion member by interposing a coil spring 215, is loaded in the first chamber 165A. The partition member 216 is a cup-shaped member that can slide in the first chamber 165A, and has a second ventilation opening 217 communicating with the fourth ventilation opening 214 at the center of the bottom surface thereof. The second ventilation opening 217 is closed by the second closing member 218. Further, the partition member 216 has a third ventilation opening 219. In the first chamber 165A,
The coil spring 215 is arranged on the igniter 213 side, and the partition wall member 216 is arranged on the second ventilation opening 214 side while being pressed and biased by the coil spring 215.

Next, the operation of the eleventh embodiment will be described with reference to FIG. When a vehicle collides, an inertial force is generated in the partition member 216 in the traveling direction. The partition wall member 216 is moved toward the igniter 213 side while compressing the coil spring 215 by the inertial force according to the vehicle speed, and the first chamber 165 is moved.
Reduce the volume of A.

On the other hand, almost simultaneously with this, the ignition circuit 162
The signal from the ignition chamber 165 causes the ignition portion 213a to move to the first chamber 165.
Ignite the combustible fluid mixture in A. At this time, since the volume of the combustible mixed fluid in the first chamber 165A is reduced, the pressurization rate of the first chamber 165A rapidly increases. As a result, the first closing member 212 is broken more quickly.
The combustion fluid mixture in the first chamber 165A is introduced into the airbag (not shown) through the first ventilation opening 211 and the diffuser 1615.

On the other hand, at least a part of the combustion fluid mixture in the first chamber 165A is introduced into the second chamber 165B via the third ventilation opening 219. Combustion fluid mixture 166
Ignites the combustible fluid mixture in the second chamber 165B. As a result, the second closing member 218 is destroyed by the differential pressure generated between the first chamber 165A and the second chamber 165B. The combustion fluid mixture is introduced into the airbag through the second ventilation opening 214, the first ventilation opening 211 and the diffuser 1615.

As described above, in the eleventh embodiment, by reducing the volume of the first chamber 165A in accordance with the vehicle speed at the time of collision, it becomes possible to control the response time until the airbag starts to inflate. .

(Embodiment 12) FIG. 21 shows the first embodiment of the present invention.
The structure of the gas generator for airbag apparatuses in 2nd Embodiment is shown. The gas generator is arranged such that its major axis direction is perpendicular to the traveling direction of the automobile. In FIG. 21, the gas generator 175 includes a first chamber 175A having a small volume and a second chamber 175 having a large volume.
B and. 1715 is a diffuser, and 1
Reference numeral 716 is a fluid ejection port provided in the diffuser 1715.

The gas generator 175 has a second ventilation opening 32 closed at one end by a second closing member 322.
Have one. Further, the first ventilation opening 323 is provided with a first closing member 324. First closing member 324
Are formed integrally with the igniter 311. 311a
Is an ignition part provided in the first chamber 175A of the igniter 311. The igniter 311 is adapted to ignite the combustible fluid mixture in the first chamber 175A in response to a signal from the ignition circuit 1734.

The first chamber 175A has a gas generator 175.
It is provided in the short axis direction of. A plurality of third ventilation openings 312 are formed in the peripheral wall in the longitudinal direction of the first chamber 175A. A partition member 314, which constitutes an inertial motion member by interposing a coil spring 313, is loaded in the first chamber 175A. The partition member 314 is a cup-shaped member that can slide in the first chamber 175A. The coil spring 313 is arranged on the igniter 311 side, and the partition wall member 314 is pressed and biased by the coil spring 313 to be fitted therein. Here, the partition member 314 is pressed against the peripheral wall of the second chamber 175 so as not to move in the normal state. The collision speed of the automobile is high, and the partition member 3
Even when 14 moves until the volume of the first chamber 175A is minimized, the opening area of the third ventilation opening 312 is secured by a predetermined amount.

Next, the operation of the twelfth embodiment will be described. When a vehicle collides, an inertial force is generated in the partition wall member 314 in the traveling direction. The partition wall member 314 compresses the coil spring 313 by the inertial force according to the vehicle speed, and the igniter 3
By moving to the 11 side, the volume of the first chamber 175A is reduced, and the opening area of the surrounding third ventilation opening 312 is reduced.

On the other hand, almost simultaneously with this, the ignition circuit 173 is
The signal from the ignition unit 311a causes the first chamber 175 to
Ignite the combustible fluid mixture in A. At this time, since the volume of the combustible mixed fluid in the first chamber 175A is reduced, the pressurization rate of the first chamber 175A rapidly increases. As a result, the first closing member 324 is broken more quickly.
The combustion fluid mixture in the first chamber 175A is connected to the first ventilation opening 3
It is introduced into an airbag (not shown) through 23.

On the other hand, at least a part of the combustion fluid mixture mixture in the first chamber 175A is introduced into the second chamber 175B via the third ventilation opening 312. The combustion fluid mixture ignites the combustible fluid mixture in the second chamber 175B. The pressure in the second chamber 175B increases due to the combustion, and when the pressure reaches a predetermined value, the second closing member 322 is destroyed. The combustion fluid mixture formed in the second chamber 175B is introduced into the airbag via the second ventilation opening 321.

As described above, in the twelfth embodiment, both the volume of the first chamber 175A and the opening area of the third ventilation opening 312 of the twelfth embodiment are adjusted according to the vehicle speed at the time of the collision. By controlling the inflation state, the combustion state of the entire device is controlled and the inflation characteristic of the airbag is controlled.

In the present embodiment, the third ventilation opening 312 is individually provided in the first chamber 175A and the opening area of the third ventilation opening 312 is changed stepwise to control the inflation rate of the airbag stepwise. However, instead of this, the third ventilation opening 312 may be formed in a slit shape and the opening area thereof may be continuously changed to continuously control the inflation rate of the airbag. .

(Embodiment 13) FIG. 22 shows the first embodiment of the present invention.
The structure of the gas generator for airbag apparatuses in 3rd Embodiment is shown. The gas generator is arranged such that its major axis direction is perpendicular to the traveling direction of the automobile. In FIG. 22, reference numeral 185 denotes a gas generator, which includes a first chamber 185A having a small volume and a second chamber 185B having a large volume. 1815 is a diffuser provided at one end of the second chamber 185. Diffuser 1
815 has a plurality of fluid ejection ports 1816.

The first chamber 185A has a first ventilation opening 71.
1 is provided. Further, the first chamber 185A has a partition wall 7
Have 04. The partition wall 704 has a second ventilation opening 712 and a third ventilation opening 713. . The second ventilation opening 712 is closed by a second closing member 714.

On the top plate 731 of the diffuser 1815,
A bush 732 is fixed to the center thereof, and at least one fluid drain hole 733 is provided around the bush 732. Inside the top plate 731, a shutter member 734 attached to the bush 732 and rotatable by inertia around the center of the top plate 731 is provided, as shown in FIG. The shutter member 734 is made of a plate material, and has fluid drain holes 735 on both sides of the center of rotation that coincide with the fluid drain holes 733 of the top plate 731. In the normal state, the shutter member 734 has the fluid drain hole 735 and the fluid drain hole 733 of the top plate 731 aligned with each other, and holds the fully open state.
The stopper pin 736 and the leaf spring pin 737 define the normal position. In the top plate 731, the igniter 715 leaving a slight gap 739 in the hole of the bush 732.
Has been inserted. The first closing member 716 is the first chamber 1
The first ventilation opening 711 of 85A is closed. Igniter 7
The ignition part 715a of 15 is provided in the first chamber 185A. The igniter 715 is connected to an ignition circuit (not shown), and ignites the combustible fluid mixture in the first chamber 185A by the signal thereof.

Next, the operation of the thirteenth embodiment will be described. When the gas generator operates during a vehicle collision, the shutter member 734 rotates (in the direction of arrow B in FIG. 23) against the pressing force of the leaf spring 738 in response to an impact (or inertial force). Moving. By moving the shutter member 734, all or part of the fluid vent hole 733 that was fully opened in the top plate 731 of the diffuser 1815 is closed.

That is, when the impact is a predetermined set value or more, the shutter member 734 moves until it is restricted by the stopper pin 736. That is, the fluid vent hole 733 on the top plate 731 side is completely closed, and the combustion fluid mixture is introduced into the airbag from the original first ventilation opening 1816. When the impact is equal to or less than the set value, the movement amount of the shutter member 734 changes according to the impact. Top 7
The fluid drain hole 733 on the 31st side and the fluid drain hole 735 on the shutter member 734 side are partially displaced, so that the fluid drain hole 733 on the top plate 731 side is partially opened. Then, a fluid amount corresponding to the opening area is released to the outside of the airbag unit, the fluid amount is adjusted, and the airbag is inflated.

When the first closing member 716 is opened, the igniter 715 is pushed to the top plate 731 side of the diffuser 1815 by the high pressure combustion fluid mixture, and the bush 732 is pressed.
It can be received in a state where it is pushed open. Bush 732
Since the hole is expanded by press fitting the igniter 715,
The shutter member 734 is prevented from rotating, and the fluid drain hole 73
The opening area of 3 is maintained and fixed.

As described above, in the thirteenth embodiment, the shutter member 734 capable of controlling the opening area of the fluid drain hole 733 according to the vehicle speed at the time of collision is provided on the top plate 731 of the diffuser 1815, and the combustion fluid By selectively letting the mixture escape, the inflated state of the airbag can be controlled.

In the present embodiment, the shutter member rotates (or moves) in response to an impact (or inertial force), which means that the shutter member 734 is rotated (or moved) by electric rotating means. You may allow it. In this case, the rotating means may be a means that detects a collision of a vehicle and rotates the shutter member 734 according to the magnitude of the impact. Alternatively, the state of the occupant (boarding position, whether the occupant is an adult or a child, etc.) may be sensed in advance, and the shutter member 734 may be rotated correspondingly.

[0143]

As is apparent from the above embodiments, the present invention has a first chamber having a first ventilation opening, a second chamber larger than the first chamber, and a flammable chamber in the first chamber. A means for igniting the volatile fluid mixture, igniting the combustible fluid mixture in the first chamber to quickly introduce the combustion fluid mixture into the airbag through the first vent opening and at least the combustion fluid mixture. The airbag device is characterized in that a part of the airbag device is introduced into the second chamber, and an airbag device having a fast initial response speed can be realized. Further, the combustion in the second chamber is controlled by devising the setting position of the third ventilation opening for introducing the combustion fluid mixture into the second chamber and further providing the deflecting means and the combustion fluid mixture cooling means. be able to. Further, it is possible to provide control means for controlling the communication state of the third ventilation opening corresponding to a predetermined condition, and to control the inflation characteristic of the airbag by this control means.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the configuration of an airbag device according to a first embodiment of the present invention.

FIG. 2 is a characteristic diagram showing a relationship between fluid pressure and time in an independent state of the first chamber and the second chamber in the second chamber in the same embodiment.

FIG. 3 is an enlarged partial vertical cross-sectional view showing a modified example of the first chamber and the second closing member in the same embodiment.

FIG. 4 is an enlarged partial vertical cross-sectional view showing another modified example of the first chamber and the second closing member in the same embodiment.

FIG. 5 is an enlarged partial vertical cross-sectional view showing still another modified example of the first chamber and the second closing member in the same embodiment.

FIG. 6 is a vertical cross-sectional view showing the configuration of a gas generator for an airbag device according to a second embodiment of the present invention.

FIG. 7 is a vertical cross-sectional view showing the configuration of an airbag device according to a third embodiment of the present invention.

FIG. 8 is a vertical cross-sectional view showing the configuration of an airbag device according to a fourth embodiment of the present invention.

FIG. 9 is a vertical sectional view showing the configuration of an airbag device according to a fifth embodiment of the present invention.

FIG. 10 is a cross-sectional view seen from the second chamber, showing the structure of the third ventilation opening in the gas generator of the airbag device.

FIG. 11 is a vertical cross-sectional view showing the configuration of an airbag device according to a sixth embodiment of the present invention.

FIG. 12 is a perspective view showing a structure of flow path deflecting means in the gas generating apparatus for an airbag device.

FIG. 13 is a vertical cross-sectional view showing the configuration of an airbag device according to a seventh embodiment of the present invention.

FIG. 14 is a front view showing the structure of a flow path deflecting means in the gas generating apparatus for an airbag device.

FIG. 15 is a vertical cross-sectional view showing the configuration of the airbag device according to the eighth embodiment of the present invention.

FIG. 16 is a vertical cross-sectional view showing the configuration of an airbag device according to a ninth embodiment of the present invention.

FIG. 17 is a partially cutaway vertical sectional view showing the structure of a gas generator for an airbag device according to a tenth embodiment of the present invention.

FIG. 18 is a lateral cross-sectional view showing the structure of a shutter member in the same gas generating apparatus for an airbag device as seen from a second chamber.

FIG. 19 is a partially cutaway vertical sectional view showing the structure of a gas generator for an airbag device according to an eleventh embodiment of the present invention.

FIG. 20 is a partially cutaway vertical cross-sectional view showing a mode of the gas generator for the airbag apparatus during a vehicle collision.

FIG. 21 is a partially cutaway vertical sectional view showing the configuration of a gas generator for an airbag device according to a twelfth embodiment of the present invention.

FIG. 22 is a partially cutaway vertical sectional view showing a configuration of an airbag device according to a thirteenth embodiment of the present invention.

FIG. 23 is a cross-sectional view seen from a diffuser showing a structure of a shutter member in the gas generator for the airbag device.

[Explanation of symbols]

1, 20, 25, 27, 29, 31, 40, 50, 65
Airbag device 2 Module case 3 Airbag 4 Fluid supply hole 5 Second chamber 5a Second chamber end 5b Second chamber end 6 Fluid filling port 7 Flammable fluid mixture 8 First ventilation opening 9, 90, 91, 92, 94 First chamber 9a, 90a, 91a, 92a Partition wall 10, 22 Third ventilation opening 11, 110, 111 Second ventilation opening 12, 120, 121 Second closing member 13 First closing Member 14 Igniter 15 Diffuser 16 Fluid diffusion hole 52 Partition plate 53 Communication hole 66 Cap body 100 Gas generator 155 Gas generator 155A First chamber 155B Second chamber 101 First ventilation opening 102 First blocking member 103 Igniter 103a Ignition part 104 Partition wall 105 Second ventilation opening 106 Third ventilation opening 107 Second closing member 108 Shutter member (inertial motion body) 126 Rotating pin 127 First Stopper pin 128 second stopper pin 129 leaf spring fixing pin 130 leaf spring 131 shutter pressing plate 1515 diffuser 1516 fluid ejection port 165 second chamber 165A first chamber 165B second chamber 211 first ventilation opening 212 first Closing member 213 Igniter 213a Ignition part 214 Fourth ventilation opening 215 Coil spring 216 Partition member (inertial motion member) 217 Second ventilation opening 218 Second closing member 219 Third ventilation opening 1615 Diffuser 1616 First ventilation opening 1624 Ignition circuit 175 Second chamber 175A First chamber 175B Second chamber 311 Ignition device 311a Ignition unit 312 Third ventilation opening 313 Coil spring 314 Partition member (inertial movement member) 321 Second ventilation opening 322 Second blocking member 323 First ventilation Opening 324 First closing member 1715 Diff User 1716 first ventilation opening 185 second chamber 185A first chamber 185B second chamber 711 first ventilation opening 712 second ventilation opening 713 third ventilation opening 714 second closing member 715 igniter 715a ignition part 716th One closing member 1815 Diffuser 1816 First ventilation opening 731 Top plate 732 Bushing 733 Fluid drain hole 734 Shutter member 735 Fluid drain hole 736 Stopper pin 737 Leaf spring pin 738 Leaf spring 739 Gap

─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yoshikazu Kawauchi 3-10-1 Higashisanda, Tama-ku, Kawasaki City, Kanagawa Prefecture Matsushita Giken Co., Ltd. (72) Inventor Kiyoshi Yamamori Tama-ku, Kawasaki City, Kanagawa Prefecture 3-10-10 Higashi Mita Matsushita Giken Co., Ltd. (72) Inventor Satoru Eto 1-1 1-1 Shimomachiya, Chigasaki-shi, Kanagawa Miyata Industry Co., Ltd. (72) Inventor Hiroyuki Takahashi Kanagawa 1-1, Shimomachiya, Chigasaki City Miyata Industry Co., Ltd. (72) Inventor, Mitsuru Tsuki Kanagawa Prefecture 1-1-1, Shimomachiya, Chigasaki City Miyata Industry Co., Ltd. (72) Inventor Usui Isu Kanagawa Prefecture 1-1 1-1 Shimomachiya, Chigasaki City Miyata Industry Co., Ltd. (56) Reference JP-A-6-144147 (JP, A) JP-A-7-329692 (JP, A) JP-A-7-2045 (JP , A) Actual Kaihei 3-50566 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60R 21/26

Claims (40)

(57) [Claims] 1. A first chamber that contains a flammable fluid and has a first ventilation opening that communicates with an airbag, and a first chamber that contains at least one of a flammable fluid and an inert fluid, and is larger than the first chamber. A second chamber, a first closing member that closes the first ventilation opening, an ignition unit that ignites a combustible fluid in the first chamber, and the first chamber and the second chamber communicate with each other. Second
A ventilation opening and a second closing member for closing the second ventilation opening.
And a third chamber communicating with the second chamber.
There is a ventilation opening, and the third ventilation opening is the second ventilation opening.
The cross-sectional area is smaller than or longer than the mouth , and at least a part of the combustible fluid in the first chamber is burned to remove the fluid in the first chamber and the second chamber from each other. It is discharged through one ventilation opening to inflate the airbag, and the flammable fluid in the first chamber burns.
A gas generator for an air bag device , wherein the first chamber forms a closed space during firing . 2. The second closing member is outside the first chamber.
The gas generator for an airbag device according to claim 1, wherein the gas generator is provided on the side . 3. The second closing member is inside the first chamber .
The gas generator for an airbag device according to claim 1 , wherein the gas generator is provided on the side . 4. The second closing member is closer to the first chamber side.
It is easy to break due to the pressure from the second chamber side
The gas generator for an airbag device according to claim 1 , wherein the gas generator is provided as described above. 5. The third ventilation opening is on the side of the first chamber.
A vent opening formed in the wall.
The gas generator for an airbag device according to any one of 1 to 4 . 6. The third ventilation opening is the second closing member.
2. A ventilation opening formed in
5. The gas generator for an airbag device according to any one of 4 to 4 . 7. The third ventilation opening is the second closing member.
And a gap formed between the first chamber and the first chamber.
The gas generator for an airbag device according to any one of claims 1 to 4, which is a characteristic of the gas generator. 8. The first closing member is provided in the first chamber.
The device according to claim 1, wherein the device is destroyed by an increase in pressure.
8. A gas generator for an airbag device according to any one of 7) . 9. The second closing member and the first chamber
Characterized by being destroyed by the pressure difference in the second chamber
The gas generator for an airbag device according to any one of claims 1 to 8 . 10. An end face provided with the first ventilation opening
Fluid diffusion with multiple radial fluid diffusion holes on the outside
The gas generator for an airbag device according to any one of claims 1 to 9, further comprising a member . 11. The number of the first chamber and the second chamber is small.
At least one is oxidant gas or oxidant gas and inert gas
The gas generator for an airbag device according to any one of claims 1 to 10, further comprising: 12. The first chamber and the second chamber communicate with each other.
The third ventilation opening and the communication state of the third ventilation opening are controlled.
And a control means for controlling the airbag.
The gas generator for an air bag device according to claim 1, wherein an inflated state is controlled . 13. The control means controls the third ventilation opening.
Equipped with a shutter member that closes between the fully open state and the minimum area
In the normal state, the shutter member is opened by the third vent.
The car crashed at high speed while keeping the mouth fully open
When closing the third vent opening to a minimum area
Otherwise, depending on the extent of the car collision,
The third ventilation opening is provided with a predetermined area between the fully opened state and the minimum area.
13. The gas generator for an air bag device according to claim 12 , wherein the gas generator operates according to an area . 14. The control means is provided inside the first chamber.
An inertial movement of the first chamber that is movable in the axial direction.
The inertial motion member includes a member,
It moves in the traveling direction by the inertial force according to the speed,
13. The gas generator for an air bag device according to claim 12, wherein the volume of the chamber is reduced . 15. The inertial motion member is provided in the first chamber.
Characterized by being biased to a position that maximizes volume
The gas generator for an airbag device according to claim 14 . 16. The first chamber is the interior of the second chamber.
Is installed so as to extend in the axial direction of the second chamber.
The gas generator for an airbag device according to claim 14 or 15 , characterized in that . 17. The first chamber is the interior of the second chamber.
In a direction substantially perpendicular to the axial direction of the second chamber
15. The apparatus according to claim 14, which is installed so as to extend to
A gas generator for an air bag apparatus of the other 15, wherein. 18. The third ventilation is provided on a side wall of the first chamber.
A plurality of openings are provided at predetermined intervals in the longitudinal direction,
The inertial motion member collides with a predetermined number of the third ventilation openings.
It is closed according to the degree of
7. The gas generator for an airbag device according to any one of 7 . 19. The inertial motion member is provided in the first chamber.
Maximize the volume and open all the third vent openings
The device is urged to a releasing position.
8. The gas generator for an airbag device according to 8. 20. The third vent opening is of the first chamber.
It consists of a slit part that extends in the longitudinal direction.
20. The gas generator for an airbag device according to claim 18, which is characterized in that . 21. The first ventilation opening and the airbag
Has a discharging means for discharging the gas body to the outside,
Communication between the derivation means and the outside according to predetermined conditions
For controlling the air,
The inflated state of the bag is controlled to control the bag.
A gas generator for an airbag device as described. 22. The control means sets the outlet to a fully open state.
The shutter means is provided for adjusting the fully closed state.
The outlet means keeps the outlet fully open in the normal state.
On the other hand, when the car collides at high speed,
Fully closed, otherwise in a car crash
Depending on the degree, the outlet is placed between a fully open state and a fully closed state.
22. The gas generator for an air bag device according to claim 21, wherein the gas generator is adjusted so as to be in a predetermined open state . 23. An ignition part of the ignition means is provided in the first chamber.
An inner wall extending inwardly and facing the ignition part of the first chamber
The gas generator for an air bag device according to claim 1, wherein a convex curved portion is provided on the surface . 24. A flammable fluid is contained and is passed through an airbag.
The first chamber with a first ventilation opening
The first chamber contains at least one of the active fluid and
A larger second chamber and a first chamber for closing the first vent opening
The closing member communicates with the first chamber and the second chamber.
A second ventilation opening and a second closure for closing the second ventilation opening
A member, the first chamber and the second chamber are communicated with each other,
A cross-sectional area smaller or longer than the second ventilation opening
Three vent openings and ignite flammable fluid in the first chamber
An ignition means, and the interior of the first chamber by the ignition means
Burning at least a portion of the flammable fluid
The third ventilation opening to expand the fluid in the second chamber.
Fluid in the first chamber from the first vent opening.
The fluid in the second chamber is discharged and at least the second fluid is discharged.
The air is discharged from the first ventilation opening through the air opening.
A gas generator for an airbag device, which is characterized by inflating a bag. 25. The third vent opening is of the second chamber.
25. The gas generator for an airbag device according to claim 24, wherein the gas generator is set on the central axis . 26. The third vent opening is of the second chamber.
Characterized by being set at a position off the central axis
The gas generator for an airbag device according to claim 24 . 27. The axis of the third ventilation opening is the second chamber.
It is set parallel to the central axis of
24. The gas generator for an airbag device according to 24 . 28. The axis of the third ventilation opening is the second axis.
Characterized by setting in the direction intersecting with the central axis of the room
The device for an airbag device according to claim 24 . 29. The second chamber has a cylindrical shape,
(3) The mouth axis of the ventilation openings should be oriented in the circumferential direction of the second chamber.
25. The gas generator for an airbag device according to claim 24, which is set . 30. A plurality of the third ventilation openings are provided, and the third ventilation opening is provided.
Each mouthpiece of the three ventilation openings can be regular or irregular
Claims characterized by being set in multiple directions
Item 24. The gas generator for an airbag device according to Item 24 . 31. The first vent through the third vent opening.
Deflection the outflow direction of the fluid ejected from the chamber to the second chamber
3. A flow path deflecting means according to claim 2 is provided.
31. The gas generator for an airbag device according to any one of 4 to 30 . 32. The flow path deflecting means is provided with the first chamber.
At least a cord provided on at least one of the second chamber
Any of the protruding piece, plate, mesh, or thin metal wire
32. The gas generator for an air bag device according to claim 31 , wherein the gas generator is selected from the above. 33. The total cross-sectional area of the third ventilation openings is
0.10 mm ² From 20 mm ² Is set within the range
33. The gas generator for an airbag device according to claim 24, wherein 34. The length of the third ventilation opening is 0.2 m.
The feature is that it is set within the range of m to 100 mm.
34. The gas generator for an airbag device according to claim 24 . 35. The first vent through the third vent opening.
Combustion gas for cooling the fluid ejected from the chamber to the second chamber
25. The gas generator for an airbag device according to claim 24, further comprising cooling means . 36. The combustion gas cooling means comprises:
At least one of the chamber and the second chamber
Also has one protruding piece, plate, mesh, or thin metal wire
36. The gas generator for an air bag device according to claim 35 , wherein the gas generator is selected from one of the two . 37. The second ventilation opening of the ignition means.
After operation, it is set to open after a predetermined time
The gas generator for an airbag device according to any one of claims 24 to 36, wherein 38. The second closing member is provided in the first chamber.
Is characterized in that it is destroyed when the pressure reaches a predetermined value.
38. The gas generator for an airbag device according to claim 37 . 39. The second closing member is mechanically broken.
38. The gas generator for an airbag device according to claim 37, wherein: 40. A first vent opening for containing a combustible fuel.
Having a first chamber and at least one second, each
And a second chamber having three ventilation openings, the first chamber having
A part of the generated combustion products is discharged through the third ventilation opening.
Is introduced into the second chamber and generated in the second chamber.
The generated combustion products are discharged from the second ventilation opening to the first chamber.
Is introduced into and generated in the first chamber and the second chamber
Combustion products are released from the first vent opening.
A gas generator for an airbag device , characterized by: