JPH10100849A - Gas generating device for air bag device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the gas generating device for an air bag device, which is furnished with expansion characteristics responding to various conditions at the time of actuating the air bag device. SOLUTION: The gas generating device for an air bag device is provided with a pressure container 1 containing inflammable gas, an ignitor 113 for igniting inflammable gas, and with gas blow-out holes 141 for inducing gas body burned by the ignitor 113, and the pressure container 1 has both a primary combustion chamber 11 capable of being communicated with the gas blow-out holes 141, and a secondary combustion chamber 12 capable of being linked with the primary combustion camber 11, and a linking condition between the primary combustion chamber 11 and the secondary combustion chamber 12 is kept under control in response to specified conditions. By this constitution, the blow-out speed of combustion gas which comes out of the pressure container 1, and goes in an air bag, can be made variable, so that the expansion of the air bag can thereby be adjusted in speed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airbag apparatus which is mounted on a vehicle or the like and protects the occupant by injecting and inflating a gas into an airbag interposed between the occupant and a vehicle interior member at the time of a collision. The present invention relates to a gas generator for use.

[0002]

2. Description of the Related Art Conventionally, a gas generating device for an airbag device has used an inert gas such as a compressed nitrogen gas or an argon gas as a gas to be used. However, a device using a combustible gas mixture has been used. It is disclosed in Japanese Unexamined Patent Publication No. 5-278554. This is because the combustible gas mixture contained in the pressure vessel is ignited from one end face side and burned, and when the gas pressure increases due to the temperature rise due to combustion,
The pressure destroys the other end face of the pressure vessel, from which combustion gas flows into the airbag to inflate the airbag, thereby realizing an airbag device with a high initial response speed. it can.

[0003]

However, in the conventional airbag device disclosed in Japanese Patent Application Laid-Open No. 5-278554, the airbag is inflated by the ignition of the gas mixture, and the airbag is inflated until the inflation is completed. The inflation characteristics of the bag follow the characteristics designed in advance, and the characteristics are fixed at the design stage. The inflation characteristics of the airbag are not always determined uniquely depending on various conditions such as the vehicle speed when the airbag device is activated and individual differences such as the occupant's seating position and physique. It is desired to provide an airbag device that ensures a degree of freedom during operation of the airbag device so that inflation characteristics corresponding to the conditions can be appropriately realized.

SUMMARY OF THE INVENTION [0004] The present invention is to solve such a conventional problem, and to provide a gas generator for an airbag device capable of realizing inflation characteristics corresponding to various conditions at the time of operation of the airbag device. With the goal.

[0005]

In order to solve this problem, a gas generator for an airbag device according to the present invention comprises a container body for containing a combustible gas mixture, and the combustible gas mixture. An igniter for igniting the gas container; and a gas ejection port for introducing a combustion gas body, which is burned by the ignition of the igniter and whose gas pressure has been increased due to a temperature rise due to combustion, into the airbag, the container comprising: On the body,
At least one container chamber that can communicate with the gas ejection port, and at least one other container chamber that can cooperate with the gas ejection port-side container chamber, and the one of the one container chamber corresponds to a predetermined condition. The gist of the invention is to control the state of cooperation between the container chamber and the other container chamber so that the inflated state of the airbag is controlled.

[0006] According to this aspect, it is possible to vary the ejection speed of the combustion gas that exits from the container body and enters the airbag, and the expansion speed of the airbag is adjusted.

In another aspect of the present invention, a container body for containing a combustible gas mixture, an apparatus body for containing the container body, and an igniter for igniting the combustible gas mixture are provided. A gas outlet for introducing a combustion gas body, which is burned by ignition by the igniter and whose gas pressure has been increased by a temperature rise due to the combustion, into the airbag, and a gas outlet between the gas outlet and the airbag. An outlet provided in the device main body portion for guiding the combustion gas body to the outside,
The gist of the invention is that the state of communication between the outlet and the outside is controlled in accordance with a predetermined condition to control the state of inflation of the airbag.

[0008] According to this aspect, a part of the combustion gas body exiting the container body and entering the airbag is discharged to the outside of the apparatus as required, and the ejection speed or the ejection amount can be changed, and the inflation of the airbag can be changed. The speed is adjusted.

According to the present invention, inflation characteristics corresponding to various conditions at the time of operating the airbag device can be realized.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A gas generator for an airbag device according to a first aspect of the present invention includes a container body for containing a combustible gas mixture and a container body for igniting the combustible gas mixture. An igniter, and a gas ejection port for introducing a combustion gas body, which is burned by the ignition of the igniter and whose gas pressure has been increased due to a temperature rise due to the combustion, into the airbag, the container body includes: At least one container chamber that can communicate with the jet port and at least one other container chamber that can cooperate with the gas jet-side container chamber, and the one container chamber corresponds to a predetermined condition. The inflated state of the airbag is controlled by controlling the cooperative state of the airbag and the other container chamber, and between the combustion of one container chamber and the combustion of the other container chamber. The time difference between An effect that it is possible to vary the ejection velocity of the combustion gases bodies entering the air bag out of the Ri container body.

According to a second aspect of the present invention, in the gas generator for an airbag device according to the first aspect, the one container chamber has a smaller volume than the other container chamber. The container chamber is provided with an igniter to form a combustion chamber, and has an effect of increasing the pressure increasing speed by the combustion gas.

According to a third aspect of the present invention, in the gas generating apparatus for an airbag device according to the second aspect, the one container chamber and the other container chamber are adjacent to each other via a partition, and the partition is connected to the partition. A sealing hole for guiding the combustion flame of the one container room to the other container room, a nozzle portion for introducing the combustion gas generated in the other container room into the one container room, and sealing the nozzle portion And a shutter member provided adjacent to the ignition hole and closing the ignition hole between a fully opened state and a minimum area.

According to a fourth aspect of the present invention, in the gas generating apparatus for an airbag device according to the second aspect, the shutter member normally keeps the fuse hole fully opened in a normal state, while the vehicle crashes. Depending on the degree of closure, when the vehicle crashes at high speed, the spill hole is closed so as to have a minimum area, otherwise the spill hole is closed to a predetermined area between the fully open state and the minimum area. It is set to work as much as possible.

According to a fifth aspect of the present invention, in the gas generator for an airbag device according to the second aspect, the inertia moving inside the one container chamber in the axial direction of the one container chamber is provided. A motion member is provided, and when the vehicle collides, the inertial motion member moves in the traveling direction by an inertial force according to the vehicle speed to reduce the volume of the primary combustion chamber.

According to a sixth aspect of the present invention, in the gas generating device for an airbag device according to the fifth aspect, the inertial motion member is provided inside the one container chamber. It is biased and fixed at the position that maximizes the volume.

According to a seventh aspect of the present invention, in the gas generator for an airbag device according to the fifth or sixth aspect, the one container chamber extends in the axial direction of the container main body inside the container main body. It was installed.

According to an eighth aspect of the present invention, in the gas generator for an airbag device according to the fifth or sixth aspect, the one container chamber is provided inside the container body with respect to the axial direction of the container body. It is installed so as to extend in a direction almost at right angles.

According to a ninth aspect of the present invention, in the gas generator for an airbag device according to the second aspect, a plurality of squib holes are provided on a side wall of the one container chamber at predetermined intervals in a longitudinal direction. On the other hand, an inertial motion member that moves in the axial direction of the one container room is provided inside the one container room, and when the vehicle collides, the inertial motion member moves in the traveling direction according to the vehicle speed. The inertia force reduces the volume of the primary combustion chamber and blocks a predetermined number of the plurality of squib holes.

According to a tenth aspect of the present invention, in the gas generator for an airbag device according to the fifth aspect, the inertial motion member is provided inside the one container chamber.
The one container room is maximized in volume and biased and fixed at a position to open all the squib holes.

According to an eleventh aspect of the present invention, in the gas generator for an airbag device according to the ninth or tenth aspect, the squib is formed to extend in a longitudinal direction of the one container chamber. It is composed of a slit portion.

According to a twelfth aspect of the present invention, in the gas generating device for an airbag device according to the second aspect, the one container chamber and the other container chamber are adjacent to each other via a partition wall. An igniter is provided in each of the one container chamber and the other container chamber, and the partition wall has a flaring hole for guiding the combustion flame of the one container chamber to the other container chamber, and an ignition port formed in the other container chamber. A nozzle portion for introducing the burned combustion gas into the one container chamber, a partition wall sealing plate for sealing the nozzle portion, and sensor means for detecting a collision of an automobile and controlling the operation of each of the igniters. It is.

According to a thirteenth aspect of the present invention, there is provided a gas generator for an airbag device according to the twelfth aspect,
The sensor means activates all the igniters when the vehicle collides at a high speed, and activates only the igniter in one of the container chambers when the vehicle collides at a medium speed, depending on the degree of collision of the vehicle. When a collision occurs, only the igniter in the other container chamber is set to operate.

According to a fourteenth aspect of the present invention, in the gas generator for an airbag device according to the twelfth or thirteenth aspect, a combustion chamber is formed inside the one container chamber. An igniter is provided.

According to a fifteenth aspect of the present invention, in the gas generating device for an airbag device according to the second aspect, the one container chamber extends from one end to the other end in the longitudinal direction of the container body. In addition, an igniter is provided in each of the inside of the squib and the inside of the vessel body outside the squib, and a combustion gas generated in the vessel body is provided at an end of the vessel body on the side of the ejection hole. A nozzle part to be introduced into the diffuser,
A partition sealing plate for sealing the nozzle portion is provided, and sensor means for detecting collision of the vehicle and controlling the operation of each of the igniters is provided.

According to a sixteenth aspect of the present invention, there is provided a gas generator for an airbag device according to the fifteenth aspect,
The sensor means activates all the igniters when the vehicle collides at a high speed, and activates the igniter provided inside the squib when the vehicle collides at a medium speed, according to the degree of collision of the vehicle. In other cases, only the igniter provided inside the container body outside the squib is set to operate.

According to a seventeenth aspect of the present invention, there is provided a container body for containing a combustible gas mixture, an apparatus body for containing the container body, and an ignition for igniting the combustible gas mixture. A gas discharge port for introducing a combustion gas body, which is burned by ignition by the igniter and whose gas pressure is increased by a temperature rise due to the combustion, into the airbag, and a gas discharge port and the airbag. An outlet provided in the main body portion between the outlet and the outlet of the combustion gas body to the outside, the communication state between the outlet and the outside is controlled corresponding to a predetermined condition, whereby the airbag of the airbag is The inflation state is controlled, and has an effect that an inflation characteristic corresponding to various conditions at the time of operating the airbag device can be realized by partially discharging the combustion gas to the outside of the device.

[0027] The invention according to claim 18 of the present invention is the gas generator for an airbag device according to claim 17, wherein
A shutter member is provided near the outlet of the apparatus main body to close the outlet between a fully opened state and a fully closed state.

According to a nineteenth aspect of the present invention, there is provided a gas generator for an airbag device according to the seventeenth aspect,
The shutter member keeps the outlet fully open in the normal state, while depending on the degree of collision of the vehicle, closes the outlet completely when the vehicle collides at a high speed, otherwise the outlet is closed. Is set so as to operate in a predetermined closed state between the fully open state and the fully closed state.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. (Embodiment 1) FIG.
2 and 3 show the configuration of the gas generator for an airbag device according to the first embodiment of the present invention.
In addition, this gas generator is installed with its long axis direction arranged transversely to the running direction of the automobile. In FIG. 1, reference numeral 1 denotes a closed cylindrical pressure vessel, which includes a small-diameter, small-capacity primary combustion chamber 11 and a large-diameter, large-capacity secondary combustion chamber 12. 14 is a plurality of gas blowing holes 1
This is a diffuser having 41 and is provided so as to surround the primary combustion chamber 11 at one end of the pressure vessel 1.

The primary combustion chamber 11 is formed by attaching a cylindrical member having a bottom to the outside of one end of the pressure vessel 1 by welding, screws, or the like. On the top wall is a first nozzle 111
Igniter 113 having a sealing plate 112 integrally provided therewith
Is attached and closed. First nozzle 111
The igniter 113 inserted in the first combustion chamber 1 has its ignition section 113a disposed in the primary combustion chamber 11 and is connected to an ignition sensor (not shown) to be heated by a signal from the ignition sensor.
1 to ignite the combustible gas mixture.
In addition, the igniter 113 and the sealing plate 112 may be separate bodies.

The secondary combustion chamber 12 is provided in the main body of the pressure vessel 1, and the partition wall 1 is provided between the primary combustion chamber 11 and the secondary combustion chamber 12.
21. The partition 121 has a second nozzle 122 formed at the center thereof, and a fire hole 123 formed at a part around the second nozzle 122. The second nozzle 122 is 1
It is sealed by a partition sealing plate 124 on the side of the next combustion chamber 11. The fuse hole 123 can be opened and closed by a shutter member 125 constituting an inertial moving body on the side of the secondary combustion chamber 12.

Here, as shown in FIGS. 2 and 3, the shutter member 125 is formed of a substantially U-shaped member, and one end thereof is pivotally supported by a partition 121 via a rotation pin 126. It is attached so as to be rotatable around 126 as a rotation center. Note that the shutter member 125 is not limited to the V-shape, and can be changed to various shapes as long as the mechanism is the same. Further, in the partition wall 121, the spill hole 123 is provided.
As shown in FIGS. 2 and 3, first and second stopper pins 127 and 128 are mounted on both sides of the shutter member 125, respectively, and the operating range of the shutter member 125 is regulated by the stopper pins 127 and 128. That is, as shown in FIG. 2, the shutter member 125 has one side edge center portion abutting on the first stopper pin 127, and
23 is displaced from the fully opened position in a direction to appropriately close it. If the squib 123 is completely closed, the flame does not pass through. Therefore, as shown in FIG. 3, the rotation end of the shutter member 125 is moved so that the shutter member 125 does not completely block the squib 123. 2 stopper pins 12
8 to secure a minimum opening area in the squib 123. As shown in FIGS. 2 and 3, a leaf spring fixing pin 129 is attached to the partition 121, and the leaf spring 1 is disposed between the leaf spring fixing pin 129 and the shutter member 125.
30 is interposed, and the shutter member 125 is
Is pressed against the stopper pin 127 of the
Is kept fully open. Further, in order to prevent the shutter member 125 from rattling in the left-right direction, a gap is provided between the pins 127, 128, and 129 so as not to hinder the movement of the shutter member 125, and the ring-shaped shutter pressing plate 131 is provided. Installed.

The other end of the pressure vessel 1 has a pressure vessel 1
A gas injection port for filling a combustible gas mixture therein is provided, and is sealed as shown in FIG. 4 after gas injection.

Next, the operation of the first embodiment will be described with reference to FIG. When the vehicle collides, the speed of the vehicle becomes substantially zero, and an inertial force corresponding to the traveling speed is generated in the shutter member 125 in the traveling direction. Accordingly, the shutter member 125 is displaced in a direction in which the opening area of the ignition hole 123 is reduced with the rotation pin 126 as a rotation fulcrum.

At about the same time, a signal is applied to the igniter 113 from an ignition circuit (not shown) to ignite and burn the combustible mixed gas in the primary combustion chamber 11. Due to the combustion, the pressure in the primary combustion chamber 11 rapidly rises, and the igniter 123
The sealing plate 112 integrated with the gasket is broken, and the combustion gas flows through the first nozzle 111 and the diffuser 14 from the gas outlet 141 toward the airbag (not shown).

At the same time as the sealing plate 112 is torn, a flame is blown from the ignition hole 123 narrowed by the shutter member 125 to ignite and burn the combustible mixed gas in the secondary combustion chamber 12. As a result, the partition wall sealing plate 124 is broken by the pressure increase due to the combustion in the secondary combustion chamber 12, and the combustion gas flows into the primary combustion chamber 11 through the second nozzle 122 and is generated in the primary combustion chamber 11. Through the first nozzle 111 and the diffuser 14 together with the remaining gas, the gas flows out from the gas outlet 141 toward the airbag. This series of operations is performed in an extremely short time.

As described above, in the first embodiment, the opening speed of the ignition hole 123 is controlled by the shutter member 125 according to the collision speed of the vehicle, so that the pressure rising speed of the primary combustion chamber 11 is changed. Thus, the inflation state of the airbag is controlled. Therefore, the airbag can be inflated and deployed according to the collision speed.

(Embodiment 2) FIGS. 4 and 5 show the configuration of a gas generator for an airbag device according to a second embodiment. The gas generator is installed with its long axis direction oriented vertically to the running direction of the vehicle. In FIG. 4, reference numeral 2 denotes a pressure vessel, which includes a primary combustion chamber 21 having a small diameter and a small capacity, and a secondary combustion chamber 22 having a large diameter and a large capacity. 23 is a plurality of gas blowing holes 2
This is a diffuser having 31 and is provided so as to surround the primary combustion chamber 21 at one end of the pressure vessel 2.

The primary combustion chamber 21 is formed by attaching a cylindrical member inserted into and out of the pressure vessel 2 to one end of the pressure vessel 2 by welding, screws, or the like. The outer top wall has a first nozzle 211 on which a sealing plate 212 is provided.
Is attached and closed. Igniter 213 inserted into first nozzle 211
The ignition part 213a is arranged in the primary combustion chamber 21,
Further, it is connected to an ignition circuit 24, is heated by the signal, and ignites the combustible gas mixture in the primary combustion chamber 21.

A second nozzle 214 is formed on the bottom wall of the primary combustion chamber 21 disposed inside the pressure vessel 2. A partition member 216 constituting an inertial motion member is loaded in the primary combustion chamber 21 with a coil spring 215 interposed therebetween, and the second nozzle 214 is closed. The partition member 216 is a cup-shaped member slidable in the primary combustion chamber 21, and has an opening 21 communicating with the second nozzle 214 at the center of the bottom surface thereof.
7 is formed, and this opening 217 is
Inside 16 is sealed by a partition sealing plate 218, and a fire hole 219 is formed in a part of the periphery. In the primary combustion chamber 21, the coil spring 215 is disposed on the igniter 213 side, and the partition member 216 is pressed and urged by the coil spring 215 and disposed on the second nozzle 214 side.

Next, the operation of the second embodiment will be described with reference to FIGS. In FIG. 4, when an automobile collides, an inertial force is generated in the partition member 216 in the traveling direction, and the partition member 216 is moved toward the igniter 213 while compressing the coil spring 215 by the inertial force according to the vehicle speed, and the primary combustion is performed. The volume of the chamber 21 is reduced.

On the other hand, at substantially the same time, an ignition signal from the ignition circuit 24 is input to the igniter 213 and the ignition unit 213
a is heated and ignites the gas mixture. At this time, since the volume of the mixed gas in the primary combustion chamber 21 is reduced,
The boosting speed of the next combustion chamber 21 sharply increases, and the igniter 213
The sealing plate 212 integrated with the gasket is broken, and the combustion gas flows out from the gas outlet 231 toward the airbag (not shown) through the first nozzle 211 and the diffuser 23.

At the same time as the sealing plate 212 is broken, a flame is blown from the ignition hole 219 of the partition member 216, and
The combustible mixed gas in the next combustion chamber 22 is ignited and burned. As a result, as shown in FIG. 5, the pressure rise due to the combustion in the secondary combustion chamber 22 causes the partition wall sealing plate 218 of the opening 217 in the bottom wall of the partition member 216 to be broken, and the combustion gas is discharged to the second nozzle 21.
4, the gas flows into the primary combustion chamber 21 and flows out from the gas outlet 231 through the first nozzle 211 and the diffuser 23 together with the remaining gas generated in the primary combustion chamber 21 toward the airbag. This series of operations is performed in an extremely short time.

As described above, in the second embodiment, the inflating state of the airbag is controlled by controlling the combustion speed by reducing the volume of the primary combustion chamber according to the vehicle speed at the time of collision. Therefore, the airbag can be inflated and deployed according to the collision speed.

(Embodiment 3) FIGS. 6, 7, 8 and 9 show a configuration of a gas generator for an airbag apparatus according to a third embodiment. In addition, this gas generator is installed with its long axis direction arranged transversely to the traveling direction of the automobile. In FIG. 6, reference numeral 3 denotes a pressure vessel, which includes a small-diameter, small-capacity primary combustion chamber 31 and a large-diameter, large-capacity secondary combustion chamber 32. Reference numeral 33 denotes a diffuser provided at one end of the pressure vessel 3,
Is the gas outlet.

The pressure vessel 3 has a nozzle 321 at one end, and the nozzle 321 is connected to the sealing plate 3 from the outside.
22. The diffuser 33 is provided outside the nozzle 321. In addition, pressure vessel 3
A part of the peripheral surface of the igniter 31 is located at a predetermined position on the nozzle 321 side.
1 is attached, and its ignition part 311a is arranged in the pressure vessel 3. The igniter 311 includes an ignition circuit 34
, And is heated by the signal to ignite the combustible gas mixture in the pressure vessel 3.

The primary combustion chamber 31 has a cylindrical member mounted inside the pressure vessel 3 by welding, screws or the like so as to surround the igniter 311, and is formed toward the short axis direction of the pressure vessel 3. . On the peripheral wall, as shown in FIG.
In the longitudinal direction of the primary combustion chamber 31, a plurality of squib holes 312
Are drilled. Coil spring 31 in primary combustion chamber 31
The partition member 314 that constitutes an inertial motion member with the intermediary 3 interposed therebetween is loaded. This partition member 314 is used for the primary combustion chamber 31.
It is a cup-shaped member that can slide inside. The coil spring 313 is arranged on the igniter 311 side, and the partition wall member 314 is pressed against the coil spring and fitted therein. Here, the partition member 314 is pressed against the peripheral wall of the pressure vessel 3 so as not to move in a normal state. The partition member 3
A cutout 314a is provided in a part of the opening end of the 14
When the collision speed of the automobile is high and the partition member 314 moves to the minimum volume of the primary combustion chamber 31, the opening area of the ignition hole 312 that achieves the fastest combustion speed is ensured.

In this manner, the primary combustion chamber 31 is included in the main body of the pressure vessel 3, and the periphery thereof is the secondary combustion chamber 32.

Next, the operation of the third embodiment will be described with reference to FIGS. In FIG. 6, when an automobile collides, an inertial force is generated in the partition member 314 in the traveling direction, and the partition member 314 is moved toward the igniter 311 while compressing the coil spring 313 by the inertial force according to the vehicle speed, and the primary combustion is performed. As the volume of the chamber 31 is reduced, the opening area of the surrounding squib 312 is reduced.

At about the same time, an ignition signal from the ignition circuit 34 is input to the igniter 311 and the ignition unit 311
a is heated and ignites the gas mixture. At this time, since the volume of the mixed gas in the primary combustion chamber 31 and the opening area of the squib 312 are reduced, the pressure increasing speed of the primary combustion chamber 31 changes. As a result, the sealing plate 322 is opened by the pressure increase due to the combustion of the secondary combustion chamber 32, and the combustion gas passes through the nozzle 321 and the diffuser 33 and passes through the gas blowout hole 331.
From the airbag (not shown). This series of operations is performed in a very short time.

As described above, in the third embodiment, both the volume of the primary combustion chamber 31 and the opening area of the squib 312 are simultaneously reduced according to the vehicle speed at the time of collision. Thus, the combustion state of the entire system is controlled, and the inflation speed of the airbag is controlled.

In this embodiment, the primary combustion chamber 31 is provided with a sintering hole 312 individually. Therefore, the inflation speed of the airbag is controlled stepwise by changing the opening area stepwise. On the other hand, as shown in FIG. 9, by forming the squib 312 in a slit shape and changing its opening area continuously, the inflation speed of the airbag is continuously controlled. Is also good.

(Embodiment 4) FIG. 10 shows a configuration of a gas generator for an airbag apparatus according to a fourth embodiment. In FIG. 10, reference numeral 4 denotes a pressure vessel, the inside of which is divided by a partition wall 44 into a first combustion chamber 41 having a small capacity and a second combustion chamber 42 having a large capacity. Partition wall 4
A nozzle (second nozzle) 421 is formed at the center of 4, and is sealed by a partition sealing plate 422 on the first combustion chamber 41 side. The communication hole 423 is provided around the nozzle 421.
Is provided, and both combustion chambers 41 and 42 are ventilated. Note that these communication holes 423 do not allow the flame to pass through, but allow the filling gas to pass freely. Reference numeral 43 denotes a diffuser provided on one end side of the pressure vessel 4, and reference numeral 431 denotes a gas outlet thereof.

In this pressure vessel 4, the first combustion chamber 4
A first nozzle 411 is provided on an end surface on one side.
11 is sealed by a sealing plate 412 from the outside. Further, a first igniter 413 is attached in the vicinity of the nozzle 411, and its igniter 413a is connected to the first combustion chamber 41.
Is located within. The diffuser 43 uses this nozzle 4
11 and the outside of the igniter 413. A second igniter 424 is attached to the end face on the side of the second combustion chamber 42, and an ignition part 424 a is arranged in the second combustion chamber 42. The two igniters 413 and 424 are connected to a sensor-unit circuit 45 that senses the magnitude of the impact and determines an ignition condition. It is heated by a signal from the circuit 45 and ignites the combustible gas mixture in each of the combustion chambers 41 and 42.

Next, the operation of the fourth embodiment will be described with reference to FIG. In FIG. 10, at the time of a vehicle collision, the sensor-unit circuit 45 makes a judgment in accordance with the vehicle speed (impact or inertial force), and when the vehicle speed is close to a preset value, the first combustion chamber 41 is set to a predetermined value. If smaller, the second combustion chamber 42 is selectively ignited and burned, and if larger than the set value, the first and second combustion chambers 4
1, 42 are simultaneously ignited and burned.

When only the first combustion chamber 41 is ignited, the combustion time is short and the pressure increasing speed is high because the volume of the combustion chamber 41 is small. For this reason, the opening of the sealing plate 412 is fast, and the rise of the inflation of the airbag is fast. Almost simultaneously with the opening of the sealing plate 412, the partition wall sealing plate 422 is opened, and a flame is blown into the second combustion chamber 42 from the second nozzle 421 to be ignited and burned. The combustion gas in the second combustion chamber 42 passes through the second nozzle 421, the first combustion chamber 41, the first nozzle 411, and the diffuser 43 after the combustion gas in the first combustion chamber 41, and passes through the gas outlet 431. Spilled, allowing for a set rise inflation.

When only the second combustion chamber 42 is ignited, the volume of the combustion chamber 42 is large, the combustion takes time, the pressure rise time becomes long, and it takes time until the partition wall sealing plate 422 is opened. For this reason, it takes time to burn (pressurize) the entire system including the first combustion chamber 41, and the opening time of the sealing plate 412 is delayed, so that the expansion whose rise is gradual with respect to the set value is possible.

When the first and second combustion chambers 41 and 42 are ignited and burned at the same time, the speed is faster than in the case of the two combustion chambers.

As described above, in the fourth embodiment, the two combustion chambers 41 and 42 that can communicate with the pressure vessel 4 and the two igniters 413 and 42 corresponding to the combustion chambers 41 and 42, respectively.
4 is provided, and the sensor-unit circuit 45 ignites one or both of the combustion chambers 41 and 42 according to the magnitude of the vehicle speed at the time of the collision, and controls the inflation speed of the airbag.

(Embodiment 5) FIG. 11 shows a configuration of a gas generator for an airbag apparatus according to a fifth embodiment. In FIG. 11, reference numeral 5 denotes a pressure vessel, which includes a first combustion chamber 51 having a small volume and second and third combustion chambers 52 and 53 having a relatively large volume. 54 is a pressure vessel 5
Is a diffuser provided at one end side, and 541 is a gas blowing hole thereof.

The first combustion chamber 51 is formed by attaching a cylindrical member inserted into and out of the pressure vessel 5 to one end face of the pressure vessel 5 by welding, screws, or the like. A first nozzle 511 is provided on the outer top wall, and a first igniter 512 integrally provided with a sealing plate is attached thereto and closed. Igniter 512 inserted into first nozzle 511
Has its ignition part 512a disposed in the primary combustion chamber 51,
Further, it is connected to the sensor unit circuit 55, is heated by the signal, and ignites the combustible gas mixture in the first combustion chamber 51. A second nozzle 513 is formed on a bottom wall of the first combustion chamber 51 disposed in the pressure vessel 5, and the nozzle 513 is sealed by a first partition wall sealing plate 514 on the first combustion chamber 51 side, In addition, a fire hole 515 is formed in a part of the periphery.

The second and third combustion chambers 52 and 53 are
A partition wall 521 provided in the main body at a longitudinally intermediate portion thereof.
Thereby, it is divided into two. Here, the first
One communicating with the combustion chamber 51 is a second combustion chamber 52, and the other is a third combustion chamber 53. A third nozzle 522 is formed at the center of the partition wall 521, and this nozzle 522 is provided on the second combustion chamber 52 side with a second partition wall sealing plate 523.
Is sealed. In addition, one or more communication holes 524 are provided around the nozzle 522, and the second and third communication holes 524 are provided.
The combustion chambers 52 and 53 are ventilated. It should be noted that these communication holes 524 do not allow a flame to pass through, but allow gas to pass freely. A second igniter 531 and a gas filling port 532 are provided on an end face of the third combustion chamber 53, and gas to be charged is supplied to the second combustion chamber 5 through the gas filling port 532.
2. It is possible to proceed to the first combustion chamber 51 via the ignition hole 515.

The two igniters 512 and 531 sense the magnitude of the impulse and determine the ignition condition.
5 is connected.

Next, the operation of the fifth embodiment will be described. When a car crashes, the sensor-unit circuit 55
In step (3), a judgment is made according to the vehicle speed (impact or inertial force). If the vehicle speed is close to a predetermined value, the first combustion chamber 51 is ignited and the third combustion chamber 53 is ignited and burned. When it is larger than the set value, the first and third combustion chambers 51 and 53 are simultaneously ignited and burned.

When only the first combustion chamber 51 is ignited, the combustion time is short and the pressure increasing speed is high because the volume of the combustion chamber 51 is small. Therefore, the opening of the sealing plate is fast, and the inflation of the airbag is quickly started. Almost simultaneously with the opening of the sealing plate, the opening of the first partition sealing plate 514 is performed, and a flame is blown into the second combustion chamber 52 from the second nozzle 513 to be ignited and burned. The combustion gas in the second combustion chamber 52 follows the combustion gas in the first combustion chamber 51, and then flows from the second nozzle 513 to the first combustion chamber 5.
1. Through the first nozzle 511 and the diffuser 54, the gas flows out of the gas blowout hole 541, and the expansion at the set rise is enabled.

When only the third combustion chamber 53 is ignited, the volume of the combustion chamber 53 is large, the combustion takes time, the pressure rise time becomes long, and it takes time until the second partition wall sealing plate 524 is opened. . Therefore, the first combustion chamber 51 and the second combustion chamber 52
It takes time to burn (pressurize) the entire system including the pressure, and the opening time of the sealing plate is delayed, so that the expansion with a slow rise relative to the set value is possible.

When the first combustion chamber 51 and the third combustion chamber 53 are simultaneously ignited and burned, the speed becomes faster than in the case of the two combustion chambers.

As described above, in the fifth embodiment, the first, second, and third combustion chambers 51, which can communicate with the pressure vessel 5,
52, 53 and two igniters 512, 531 corresponding to the first and third combustion chambers 51, 53 are provided, and the first or third combustion is performed by the sensor-unit circuit 55 according to the magnitude of the vehicle speed at the time of collision. The inflation rate of the airbag is controlled by igniting the chambers 51, 53 or both.

(Embodiment 6) FIG. 12 shows a configuration of a gas generator for an airbag device according to a sixth embodiment. In FIG. 12, 6 is a pressure vessel, and 63 is a diffuser.

The pressure vessel 6 is provided with a nozzle 622 on one end face thereof, and the nozzle 622 is sealed with a sealing plate 623 from the outside. In addition, this nozzle 6
First and second igniters 611 and 621 are attached to both sides of the fuel cell 22, and their ignition parts 611 a and 621 a are arranged in the first and second combustion chambers 61 and 62. The diffuser 63 includes the nozzle 622 and the first and second igniters 61.
1, 621 are provided outside. Two igniters 61
1, 621 is connected to a sensor-unit circuit (not shown) for detecting the magnitude of the impact and judging an ignition condition, and is heated by the signal to ignite the combustible gas mixture in each combustion chamber 61, 62. Has become.

In the pressure vessel 6, a first igniter 61
A fire tube 612 is provided on 1 and extends to the longitudinal end of the pressure vessel 6. In addition, both ends of the squib 612 are fixed to both ends of the pressure vessel 6 so as not to be moved by an external force such as vibration. A squib 613 is provided at the tip of the squib 612 (on the side opposite to the igniter). Thus, the first combustion chamber 61 is formed in the squib 612, and the second combustion chamber 62 is formed around the first combustion chamber 61. Here, the volume of the first combustion chamber 61 is sufficiently smaller than the volume of the second combustion chamber 62.

Next, the operation of the sixth embodiment will be described. In FIG. 12, when a vehicle crashes,
The unit circuit makes a decision according to the vehicle speed (impact or inertia force). If the vehicle speed is close to a preset value, the first combustion chamber 61 is ignited. If it is larger than the set value, the first and second combustion chambers 61 and 62 are simultaneously ignited and burned.

When only the first combustion chamber 61 is ignited, the combustion speed is very high, and the gas in the second combustion chamber 62 is agitated by the flame blown out from the squib 613, so that the combustion is efficiently performed. A high pressure rise speed is obtained, and the airbag inflation rises quickly.

When only the second combustion chamber 62 is ignited, the volume of the combustion chamber 62 is large, and it takes a long time for combustion.
The time to reach the opening pressure of 3 becomes longer. by this,
Expansion with a slow rise is possible.

When the first combustion chamber 61 and the second combustion chamber 62 are simultaneously ignited and burned, the speed is faster than in the case of the two combustion chambers, so that the expansion can be made to rise above the set value.

As described above, in the sixth embodiment, the two combustion chambers 61 and 62 that can communicate with the pressure vessel 6 and the two igniters 611 and 62 corresponding to the combustion chambers 61 and 62, respectively.
1, the sensor-unit circuit ignites one or both of the combustion chambers 61 and 62 in accordance with the magnitude of the vehicle speed at the time of the collision to control the inflation speed of the airbag.

(Embodiment 7) FIG. 13 shows a configuration of a gas generator for an airbag device according to a seventh embodiment. In addition, this gas generator is installed with its long axis direction arranged transversely to the traveling direction of the automobile. In FIG. 13, reference numeral 7 denotes a pressure vessel, which is a small-diameter and small-volume primary combustion chamber 71 and a large-diameter and large-volume secondary combustion chamber 7.
2 is provided. Reference numeral 73 denotes a diffuser provided on one end side of the pressure vessel 7 so as to surround the primary combustion chamber 71, and reference numeral 740 denotes a gas outlet thereof.

The primary combustion chamber 71 is formed by attaching a cylindrical member inserted into and out of the pressure vessel 7 to one end of the pressure vessel 7 by welding, screws, or the like. Pressure vessel 7
A first nozzle 71 is provided at the center of the top wall protruding outside the
1 is provided. A second nozzle 712 is formed at the center of the bottom wall arranged in the pressure vessel 7, and a fire hole 713 is formed around the second nozzle 712. Second nozzle 7
Reference numeral 12 is sealed by a sealing plate 714 on the primary combustion chamber 71 side.

A bush 732 is fixed to the center of the top plate 731 of the diffuser 73, and one or a plurality of gas vent holes 733 are provided around the bush 732. Top plate 731
A shutter member 734 attached to the bush 732 and rotatable by inertia about the center of the top plate 731 is provided on the inner side of the bush 732 as shown in FIGS. The shutter member 734 is made of a plate material, and gas vent holes 735 corresponding to the gas vent holes 733 of the top plate 731 are provided on both sides of the rotation center. In a normal state, the shutter member 734 is provided with the gas vent hole 735 and the top plate 731.
A stopper pin 736 is provided on the top plate 731 side so that the gas vent hole 733 coincides with the gas vent hole 733 and can be maintained in a fully opened state.
8 is arranged to define the fixed position. In such a top plate 731, the igniter 715 is inserted leaving a slight gap 739 in the hole of the bush 732, and the primary combustion chamber 7
1 to block the first nozzle 712, and
15a is arranged in the primary combustion chamber 71. The igniter 715 is connected to an ignition sensor (not shown), is heated by the signal, and ignites the combustible gas mixture in the primary combustion chamber 71.

Next, the operation of the seventh embodiment will be described. In FIG. 13, when the gas generator operates at the time of collision of the automobile, the shutter member 734 rotates (moves) against the pressing force of the leaf spring 738 in response to the impact (or inertial force). Gas vent hole 73 on shutter member 734 side
By the movement of 5, as shown in FIG. 15 or FIG.
All or a part of the fully opened gas vent hole 733 of the top plate 731 of the diffuser 73 is closed.

That is, when the impact is equal to or greater than the set value, the shutter member 734 moves until it is restricted by the stopper pin 736, and as shown in FIG.
The side vent hole 733 is completely closed, the combustion gas flows out of the original gas outlet 740 into the airbag, and the airbag is inflated in a preset state. 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, and the displacement between the gas vent hole 733 on the top plate 731 side and the gas vent hole 735 on the shutter member 734 side causes the displacement shown in FIG. As shown in FIG.
33 is partially opened, the gas amount corresponding to the opening area is released to the outside of the airbag unit, the gas amount is adjusted, and the airbag is inflated.

When the sealing plate is opened, as shown in FIG. 17, the igniter 715 is pushed by the high-pressure combustion gas toward the top plate 731 of the diffuser 73, and is received with the bush 732 expanded. . Thereby, the nozzle 7
It does not hinder the outflow of gas from 11. Further, since the bush 732 has its hole expanded by press-fitting the igniter 715, the rotation of the shutter member 734 is prevented, and the opening area of the gas vent hole 733 is maintained and fixed.

As described above, in the seventh embodiment, the shutter member 734 capable of controlling the opening area of the gas vent hole 733 in accordance with the vehicle speed at the time of collision is provided on the top plate 731 of the diffuser 73, and Controlling the inflation state of the airbag by selectively allowing gas to escape.

[0084]

According to the present invention, as is apparent from the above-described embodiments, the airbag deployment speed can be controlled in accordance with the speed at the time of vehicle collision or the size and position of the occupant. Inflation characteristics corresponding to various conditions at the time of operation of the bag device can be realized.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view illustrating a configuration of a gas generator for an airbag device according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing an aspect of the gas generator for an airbag device when the vehicle is running.

FIG. 3 is a partial cross-sectional view showing a mode at the time of a vehicle collision in the gas generator for an airbag device.

FIG. 4 is a partial cross-sectional view illustrating a configuration of a gas generator for an airbag device according to a second embodiment of the present invention.

FIG. 5 is a partial cross-sectional view showing a mode at the time of a vehicle collision in the gas generator for an airbag device.

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

FIG. 7 is a partial cross-sectional view showing an aspect of the gas generator for an airbag device when the vehicle is running.

FIG. 8 is a partial cross-sectional view showing a mode at the time of a vehicle collision in the gas generator for an airbag device.

FIG. 9 is a partial cross-sectional view of the gas generator for the airbag device, with a part thereof changed.

FIG. 10 is a partial sectional view showing a configuration of a gas generator for an airbag device according to a fourth embodiment of the present invention.

FIG. 11 is a partial sectional view showing a configuration of a gas generator for an airbag device according to a fifth embodiment of the present invention.

FIG. 12 is a partial sectional view showing a configuration of a gas generator for an airbag device according to a sixth embodiment of the present invention.

FIG. 13 is a partial cross-sectional view illustrating a configuration of a gas generator for an airbag device according to a seventh embodiment of the present invention.

FIG. 14 shows a gas generator for the airbag device.
Partial cross-sectional view showing an aspect when driving a car

FIG. 15 shows a gas generator for the airbag device.
Partial sectional view showing an aspect at the time of an automobile collision

FIG. 16 shows a gas generator for the airbag device,
Partial sectional view showing an aspect at the time of an automobile collision

FIG. 17 In the gas generator for the airbag device,
Partial sectional view showing an aspect at the time of an automobile collision

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 pressure vessel 11 primary combustion chamber 111 first nozzle 112 sealing plate 113 igniter 113 a ignition part 12 secondary combustion chamber 121 partition 122 second nozzle 123 firing hole 124 partition sealing plate 125 shutter member (inertial moving body) 126 Rotating pin 127 First stopper pin 128 Second stopper pin 129 Leaf spring fixing pin 130 Leaf spring 131 Shutter presser plate 14 Diffuser 141 Gas outlet 2 Pressure vessel 21 Primary combustion chamber 211 First nozzle 212 Seal plate 213 Ignition device 213a Ignition unit 214 Second nozzle 215 Coil spring 216 Partition member (inertial motion member) 217 Opening 218 Partition sealing plate 219 Firing hole 22 Secondary combustion chamber 23 Diffuser 231 Gas blowing hole 24 Ignition circuit 3 Pressure vessel 31 1 Next combustion chamber 311 Igniter 311a point Fire part 312 Fire hole 313 Coil spring 314 Partition member (inertial movement member) 314a Notch 32 Secondary combustion chamber 321 Nozzle 322 Seal plate 33 Diffuser 331 Gas blowout hole 34 Ignition circuit 4 Pressure vessel 41 First combustion chamber 411 First Nozzle 412 Seal plate 413 First igniter 413a Ignition part 42 Second combustion chamber 421 Second nozzle 422 Partition wall sealing plate 423 Communication hole 424 Second igniter 424a Ignition part 43 Diffuser 431 Gas outlet hole 44 Partition 45 sensor Unit circuit 5 Pressure vessel 51 First combustion chamber 511 First nozzle 512 First igniter 512a Ignition unit 513 Second nozzle 514 First partition wall sealing plate 515 Fire hole 52 Second combustion chamber 521 Partition wall 522 Third Nozzle 523 Second partition sealing plate 524 Communication hole 53 Third combustion chamber 31 Second igniter 532 Gas filling port 54 Diffuser 541 Gas outlet 55 Sensor unit circuit 6 Pressure vessel 61 First combustion chamber 611 First igniter 611a Ignition section 612 Fire tube 613 Fire hole 62 Second combustion chamber 621 Second igniter 621a Ignition section 622 Nozzle 63 Diffuser 7 Pressure vessel 71 Primary combustion chamber 711 First nozzle 712 Second nozzle 713 Fire port 714 Seal plate 715 Ignition section 715a Ignition section 72 Secondary combustion chamber 73 Diffuser 731 Top plate 732 Bush 733 Gas vent hole 734 Shutter member 735 Gas vent hole 736 Stopper pin 737 Leaf spring pin 738 Leaf spring 739 Gap 740 Gas outlet

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigeru Takeyama 3-10-1, Higashi-Mita, Tama-ku, Kawasaki-shi, Kanagawa Prefecture Inside Matsushita Giken Co., Ltd. (72) Inventor Hiroyuki Takahashi Shimomachiyaichi, Chigasaki-shi, Kanagawa Prefecture 1-1 1-1 Miyata Kogyo Co., Ltd. (72) Inventor Yasushi Yasui 1-1 1-1 Shimomachiya, Chigasaki City, Kanagawa Prefecture (72) Inventor Mitsugu Tsugigi Shimomachiya Chichizaki City, Kanagawa Prefecture No. 1-1, Miyata Kogyo Co., Ltd.

Claims (19)

[Claims] 1. A container body for accommodating a combustible gas mixture, an igniter for igniting the combustible gas mixture, and a gas pressure which is burned by the ignition of the igniter and which is heated by the combustion to increase the temperature. A gas outlet for introducing the increased combustion gas body into the airbag, at least one container chamber communicable with the gas outlet in the container body, and the gas outlet side. The airbag having at least one other container chamber that can cooperate with the container chamber, and the cooperative state between the one container chamber and the other container chamber is controlled in accordance with a predetermined condition. A gas generator for an airbag device, wherein the inflated state of the gas is controlled. 2. The one container chamber is formed to have a smaller volume than the other container chamber, and the one container chamber is provided with an igniter to form a combustion chamber. Item 2. A gas generator for an airbag device according to Item 1. 3. The one container chamber and the other container chamber are adjacent to each other with a partition wall interposed therebetween, and the partition wall has a flaring hole for guiding the combustion flame of the one container chamber to the other container chamber. A nozzle part for introducing the combustion gas generated in the container chamber into the one container chamber, a partition wall sealing plate for sealing the nozzle part, 3. The gas generator for an airbag device according to claim 2, further comprising a shutter member that closes between the area and the shutter member. 4. The shutter member maintains a spill hole in a fully open state in a normal state, and has a minimum area when the vehicle collides at a high speed according to the degree of collision of the vehicle. 3. The airbag device according to claim 2, wherein the airbag device is set to be closed, and otherwise operate so as to set the spill hole to a predetermined area between the fully open state and the minimum area. Gas generator. 5. An inertial motion member that moves in the axial direction of the one container chamber is provided inside the one container chamber, and when the vehicle collides, the inertial motion member moves in the traveling direction according to the vehicle speed. 3. The gas generator for an airbag device according to claim 2, wherein the gas generator moves by force to reduce the volume of the primary combustion chamber. 6. The air according to claim 5, wherein the inertial motion member is biased and fixed inside the one container chamber to a position where the volume of the one container chamber is maximized. Gas generator for bag device. 7. The gas generator for an airbag device according to claim 5, wherein the one container chamber is provided inside the container main body so as to extend in the axial direction of the container main body. 8. The container chamber according to claim 5, wherein said one container chamber extends inside the container body in a direction substantially perpendicular to the axial direction of the container body.
The gas generator for an airbag device as described in the above. 9. A side wall of the one container chamber is provided with a plurality of fire holes at predetermined intervals in a longitudinal direction, and inside the one container chamber is an axial direction of the one container chamber. An inertial motion member that moves in the direction of the vehicle. When the vehicle collides, the inertial motion member moves in the traveling direction by an inertial force according to the vehicle speed to reduce the volume of the primary combustion chamber, and 3. The gas generator for an airbag device according to claim 2, wherein a predetermined number of the ignition holes are closed. 10. The inertial motion member is biased and fixed inside the one container chamber at a position where the volume of the one container chamber is maximized and all the ignition holes are opened. The gas generator for an airbag device according to claim 5, wherein 11. The gas generator for an airbag device according to claim 9, wherein said ignition hole comprises a slit portion formed to extend in a longitudinal direction of said one container chamber. 12. The one container room and the other container room are adjacent to each other via a partition, and the one container room and the other container room are respectively provided with an igniter, and the partition has the igniter. A fuse hole for guiding the combustion flame of one container room to the other container room, a nozzle portion for introducing the combustion gas generated in the other container room to the one container room, and a partition seal for sealing the nozzle portion 3. The gas generator for an airbag device according to claim 2, further comprising a plate and sensor means for detecting a collision of the vehicle and controlling the operation of each of the igniters. 13. The sensor means activates all the igniters when the vehicle collides at a high speed and only activates the igniter in one of the container chambers when the vehicle collides at a medium speed, according to the degree of collision of the vehicle. 13. The gas generator for an airbag device according to claim 12, wherein the gas generator is set to be activated so that when a collision occurs at a low speed, only the igniter of the other container chamber is activated. 14. The gas generator for an airbag device according to claim 12, wherein a combustion chamber is formed inside the one container chamber, and an igniter is provided in the combustion chamber. . 15. The one container chamber is formed of a squib that extends from one end to the other in the longitudinal direction of the container body, and the inside of the squib and the inside of the container body outside the squib are respectively provided. An igniter is provided, a nozzle portion for introducing the combustion gas generated in the container body to the diffuser, and a partition wall sealing plate for sealing the nozzle portion are provided at an end of the container body on the side of the ejection hole. 3. A gas generator for an airbag device according to claim 2, further comprising sensor means for detecting a collision of the igniter and controlling the operation of each of said igniters. 16. The sensor means is provided inside the squib according to the degree of collision of the vehicle when all the igniters are activated when the vehicle collides at a high speed and when the vehicle collides at a medium speed. The air according to claim 15, wherein the igniter is set to be activated, and otherwise, only the igniter provided inside the container body outside the squib is activated. Gas generator for bag device. 17. A container body for containing a combustible gas mixture, an apparatus body for containing the container body, an igniter for igniting the combustible gas mixture, and burning by ignition by the igniter A gas outlet for introducing a combustion gas body having an increased gas pressure due to a temperature rise due to combustion into the airbag, and the combustion provided on the apparatus main body between the gas outlet and the airbag. A discharge port for discharging a gas body to the outside, wherein a communication state between the discharge port and the outside is controlled in accordance with a predetermined condition, whereby an inflation state of the airbag is controlled. Gas generator for an airbag device. 18. The gas for an airbag device according to claim 17, wherein a shutter member for closing the outlet between a fully opened state and a fully closed state is provided near the outlet of the apparatus main body. Generator. 19. The shutter member maintains the outlet in a fully open state in a normal state, and completely closes the outlet when the vehicle collides at a high speed, according to the degree of collision of the vehicle. 18. The gas generator for an airbag device according to claim 17, wherein in the case, the gas outlet is set to operate so as to set the outlet to a predetermined closed state between a fully opened state and a fully closed state.